CN120363979A

CN120363979A - Cart frame and lock release mechanism thereof

Info

Publication number: CN120363979A
Application number: CN202510083312.1A
Authority: CN
Inventors: 孙明星; 汪尔学; 胡志强; 阴洪涛
Original assignee: China Wonderland Nurserygoods Co Ltd
Current assignee: China Wonderland Nurserygoods Co Ltd
Priority date: 2024-01-24
Filing date: 2025-01-17
Publication date: 2025-07-25
Also published as: WO2025157226A1

Abstract

The present application relates to a cart frame and a release mechanism thereof, wherein the release mechanism comprises a first release member rotatably arranged on the cart frame, the first release member being drivingly connected to the folding locking mechanism to allow the lower hand frame to pivot relative to the wheel frame; a second release member rotatably arranged on the cart frame, the second release member being drivingly connected to the height adjustment locking mechanism to allow the upper hand frame to move relative to the lower hand frame; and an operating member movably arranged on the cart frame and adapted to drive any one of the first release member and the second release member to rotate. Therefore, the user can control the rotation of the first release member by driving the operating member, thereby indirectly controlling the folding locking mechanism; at the same time, the user can also control the rotation of the second release member by driving the operating member, thereby indirectly controlling the height adjustment locking mechanism. It is precisely because the user only needs to operate the above-mentioned release mechanism to control different locking mechanisms respectively, thus improving the user's operating convenience.

Description

Cart frame and lock release mechanism thereof

Technical Field

The application relates to the technical field of infant products, in particular to a cart frame and a lock releasing mechanism thereof.

Background

It has become very common and convenient for families with infants to use a child stroller as an auxiliary care tool when going out.

In order to meet the demands of users on the practicality and convenience of the child stroller, a folding locking mechanism is usually arranged on a frame of the child stroller, and the users can keep the child stroller in an unfolded state or a folded state through the folding locking mechanism. In addition, in order to improve the suitability of children's shallow, still be equipped with high adjustment locking mechanical system on children's shallow's car hand rest, the user can adjust the height of car hand rest through this mechanism to adapt to different user's needs of gripping. At present, the folding locking mechanism and the height adjusting locking mechanism of the common child cart are two independent mechanisms, and the folding locking mechanism and the height adjusting locking mechanism are realized through two independent operating mechanisms when the state of the frame or the height of the vehicle frame is adjusted. However, such a design is prone to cause inconvenience to the user.

Disclosure of Invention

In view of the above, it is desirable to provide a cart frame and a lock release mechanism thereof that can release locks for a folding lock mechanism and a height adjustment lock mechanism, respectively.

The invention provides a release lock mechanism which is suitable for a trolley frame, wherein the trolley frame comprises an upper trolley frame, a lower trolley frame, a wheel frame, a height adjustment locking mechanism and a folding locking mechanism, the upper trolley frame and the lower trolley frame are limited or allowed to move relatively through the height adjustment locking mechanism, the lower trolley frame is pivoted with the wheel frame and is limited or allowed to pivot relatively through the folding locking mechanism, the release lock mechanism comprises a first release lock piece, a second release lock piece and an operating piece, the first release lock piece is rotatably arranged on the trolley frame, the first release lock piece is in driving connection with the folding locking mechanism so as to allow the lower trolley frame to pivot relative to the wheel frame, the second release lock piece is rotatably arranged on the trolley frame, the second release lock piece is in driving connection with the height adjustment locking mechanism so as to allow the upper trolley frame to move relative to the lower trolley frame, and the operating piece is movably arranged on the trolley frame and is suitable for driving any one of the first release lock piece and the second release lock piece to rotate.

In the above-mentioned release lock mechanism, since the first release lock member is rotatably provided on the cart frame and is in driving connection with the folding lock mechanism, the second release lock member is rotatably provided on the cart frame and is in driving connection with the height adjustment lock mechanism, and the operation member is movable and is used for driving either one of the first release lock member and the second release lock member to rotate, wherein the folding lock mechanism can allow the lower cart frame to pivot relative to the wheel frame, and the height adjustment lock mechanism can allow the upper cart frame to slide relative to the lower cart frame. Therefore, the user can control the first release locking piece to rotate by driving the movement of the operating piece, and then indirectly control the folding locking mechanism, so that the trolley frame can be switched between the unfolding state and the locking state. Meanwhile, a user can control the second lock release piece to rotate by driving the movement of the operation piece, and then indirectly control the height adjustment locking mechanism, so that the height of the trolley frame is adjustable. Just because the user only needs to operate the locking mechanism and can respectively control different locking mechanisms, the operation convenience of the user is improved.

In one embodiment, the lock release mechanism further comprises a safety lock, wherein the safety lock is movably arranged on the trolley frame and can be switched between a first position and a second position, the operating piece is in driving connection with the first lock release piece through the safety lock when the safety lock is located at the first position, and the operating piece is in driving connection with the second lock release piece through the safety lock when the safety lock is located at the second position.

In one embodiment, the safety lock comprises a stirring piece, a first linkage piece and a second linkage piece, wherein the stirring piece is movably arranged on the cart frame along a first direction and can be switched between a first position and a second position, the first linkage piece is movably connected with the stirring piece along a second direction and is in driving connection with the first lock release piece, the second linkage piece is movably connected with the stirring piece along a second direction and is in driving connection with the second lock release piece, the first direction is intersected with the second direction, the operation piece can move along the second direction relative to the cart frame, when the stirring piece is located at the first position, the operation piece can be operated to push the first linkage piece to move so as to enable the first lock release piece to rotate, and when the stirring piece is located at the second position, the operation piece can be operated to push the second linkage piece to move so as to enable the second lock release piece to rotate.

In one embodiment, the first linkage member has a first abutting portion, the second linkage member has a second abutting portion, the operation member has a first driving portion and a second driving portion which are disposed at intervals, when the toggle member is located at the first position, the first abutting portion is located at the first driving portion, the second abutting portion is located at the second driving portion in a staggered manner, and when the toggle member is located at the second position, the second abutting portion is located at the second driving portion in a staggered manner, and the first abutting portion is located at the first driving portion in a staggered manner.

In one embodiment, the operating member further comprises a third driving part and a fourth driving part, the third driving part and the fourth driving part are arranged at intervals and are positioned between the first driving part and the second driving part, the first linkage member and the second linkage member are arranged at intervals and form a third avoiding part therebetween, the first linkage member further comprises a third abutting part and a fourth abutting part, when the toggle member is positioned at the first position, the third abutting part is positioned at the third driving part, the fourth driving part is positioned at the third avoiding part, and when the toggle member is positioned at the second position, the fourth abutting part is positioned at the fourth driving part, and the third driving part is positioned at the third avoiding part.

In one embodiment, a first avoidance portion is formed between the first abutting portion and the third abutting portion, a second avoidance portion is formed between the second abutting portion and the fourth abutting portion, the second avoidance portion is used for avoiding the second driving portion when the toggle member is located at the first position and the operating member is operated, and the first avoidance portion is used for avoiding the first driving portion when the toggle member is located at the second position and the operating member is operated.

In one embodiment, one of the first interlocking member and the first unlocking member has a first guiding recess, the other has a first engaging protrusion slidably disposed within the first guiding recess and extending in the first direction, and one of the second interlocking member and the second unlocking member has a second guiding recess, the other has a second engaging protrusion slidably disposed within the second guiding recess and extending in the first direction.

In one embodiment, the lock release mechanism further comprises a first elastic member, wherein the first elastic member is abutted between the cart frame and the stirring member and is used for providing elastic restoring force for the stirring member so as to enable the stirring member to be kept at the first position or the second position.

In one embodiment, the operating member has an initial position and a lock release position, when the operating member is located at the initial position, the operating member can be operated to move to push against the first linkage member or the second linkage member, and when the operating member is located at the lock release position, the operating member pushes against the first linkage member or the second linkage member.

In one embodiment, the lock release mechanism further comprises a second elastic member abutting between the cart frame and the operating member for providing an elastic restoring force to the operating member to maintain the operating member in the initial position.

In one embodiment, the operating member has an initial position and a release position, one of the first release lock member and the cart frame is provided with a first stop concave portion, the other one is provided with a first stop convex portion which is abutted against one side wall of the first stop concave portion when the operating member is switched to the initial position, the first stop convex portion is abutted against the other side wall corresponding to the first stop concave portion when the operating member is switched to the release position, the other one is provided with a second stop concave portion, and the other one is provided with a second stop convex portion which is abutted against one side wall of the second stop concave portion when the operating member is switched to the initial position, and the second stop convex portion is abutted against the other side wall corresponding to the second stop concave portion when the operating member is switched to the release position.

In one embodiment, the first locking member is provided with a first connecting portion, the first connecting portion and the rotation center of the first locking member are arranged in a staggered mode, the first connecting portion is used for connecting the folding locking mechanism, the second locking member is provided with a second connecting portion, the second connecting portion and the rotation center of the second locking member are arranged in a staggered mode, and the second connecting portion is used for connecting the height adjusting locking mechanism.

The invention also provides a trolley frame, which comprises an upper trolley frame, a lower trolley frame, a wheel frame, a folding locking mechanism, a height adjusting locking mechanism and a releasing locking mechanism as described above, wherein the upper trolley frame and the lower trolley frame are limited or allowed to move relatively through the height adjusting locking mechanism, the lower trolley frame is pivoted with the wheel frame and is limited or allowed to pivot relatively through the folding locking mechanism, and the releasing locking mechanism is arranged on the trolley frame or the wheel frame and is respectively connected with the folding locking mechanism and the height adjusting locking mechanism in a driving way so as to allow the lower trolley frame to pivot relative to the wheel frame and the upper trolley frame to move relative to the lower trolley frame.

In one embodiment, the folding locking mechanism comprises a first locking piece and a fixing piece, wherein the fixing piece is provided with a locking concave part and is installed on one of the wheel frame or the lower hand frame, the first locking piece is movably arranged on the other of the wheel frame or the lower hand frame and is in operable connection with the first releasing locking piece, when the first locking piece is inserted into the locking concave part, the lower hand frame is limited to pivot relative to the wheel frame, and when the first locking piece is retracted from the locking concave part, the lower hand frame can pivot relative to the wheel frame.

In one embodiment, the folding locking mechanism further comprises a first traction member connected between the first release locking member and the first locking member, the first release locking member driving the first locking member to retract from the locking recess via the first traction member.

In one embodiment, the height adjustment locking mechanism comprises a rider locking assembly and a locking hole, one of the upper and lower rider frames is provided with a locking hole, the other is provided with a rider locking assembly, and the rider locking assembly can be clamped with the locking hole so as to lock the upper and lower rider frames.

In one embodiment, the handle lock assembly is arranged on the upper handle frame and comprises a moving part which is movably arranged on the upper handle frame and is operatively connected with the second release lock part, the moving part is provided with a guide groove which extends obliquely relative to the moving direction of the moving part, and the second lock part is provided with a guide post which extends into the guide groove and is in sliding fit with the guide groove so as to be capable of extending into or retracting from the locking hole.

In one embodiment, the height adjustment locking mechanism further includes a second traction member, the second traction member is connected between the second lock release member and the moving member, and the second lock release member drives the moving member to move through the second traction member so as to drive the second lock member to retract from the locking hole.

In one embodiment, the locking holes are provided in plurality, and the locking holes are arranged at intervals along the sliding direction of the upper handle frame relative to the lower handle frame.

The application provides a release lock mechanism which is suitable for a trolley frame, wherein the trolley frame comprises a trolley frame, a wheel frame, a reversing locking mechanism and a folding locking mechanism, the trolley frame is rotatably arranged on the wheel frame, the reversing locking mechanism and the folding locking mechanism are arranged between the trolley frame and the wheel frame, the trolley frame can be limited or allowed to rotate relative to the wheel frame by the reversing locking mechanism to change, the trolley frame can also be limited or allowed to rotate relative to the wheel frame to fold by the folding locking mechanism, the release lock mechanism comprises a first release lock piece, a second lock piece and an operating piece, the first release lock piece is rotatably arranged on the trolley frame and is in driving connection with the reversing locking mechanism to allow the trolley frame to rotate relative to the wheel frame to change, the second lock piece is rotatably arranged on the trolley frame and is in driving connection with the folding locking mechanism to allow the trolley frame to rotate relative to fold, and the operating piece can be movably arranged on the trolley frame and selectively releases the first release lock piece.

In one embodiment, the safety lock comprises a first linkage part, a second linkage part and a toggle part, wherein the first linkage part is in driving connection with the first lock release part, the second linkage part is in driving connection with the second lock release part, the toggle part is respectively connected with the first linkage part and the second linkage part, the toggle part is movably arranged on the cart frame and can be switched between the first position and the second position so as to drive the first linkage part and the second linkage part to move along a third direction, when the toggle part is positioned at the first position, the operation part is operated to push the first linkage part to move along a fourth direction so as to enable the first lock release part to rotate, and when the toggle part is positioned at the second position, the operation part is operated to push the second linkage part to move along the fourth direction so as to enable the second lock release part to rotate, and the third direction is intersected with the fourth direction.

In one embodiment, the first locking member is provided with a first connecting portion, the first connecting portion and the rotation center of the first locking member are arranged in a staggered mode, the first connecting portion is used for connecting the reversing locking mechanism, the second locking member is provided with a second connecting portion, the second connecting portion and the rotation center of the second locking member are arranged in a staggered mode, and the second connecting portion is used for connecting the folding locking mechanism.

The application also provides a trolley frame which is provided with an unfolding state and a folding state, and comprises a trolley frame, a reversing locking mechanism, a folding locking mechanism and a releasing locking mechanism, wherein the trolley frame is rotatably arranged on the trolley frame, the reversing locking mechanism is arranged between the trolley frame and the trolley frame, the trolley frame can be limited or allowed to rotate relative to the trolley frame by virtue of the reversing locking mechanism so as to reverse, the folding locking mechanism is arranged between the trolley frame and the trolley frame, the trolley frame can be limited or allowed to rotate relative to the trolley frame by virtue of the folding locking mechanism so as to fold, and the releasing locking mechanism is arranged on the trolley frame and is respectively in driving connection with the folding locking mechanism and the releasing locking mechanism so as to allow the trolley frame to rotate relative to the trolley frame so as to reverse or fold.

In one embodiment, the handle frame and the wheel frame are pivoted to a first pivot point so that the handle frame has a first use position and a second use position relative to the wheel frame, the reversing locking mechanism comprises a first locking piece, a first clamping piece and a second clamping piece, the first clamping piece and the second clamping piece are arranged on the wheel frame at intervals around the circumference of the first pivot point, the first locking piece is arranged on the handle frame and is suitable for being clamped with the first clamping piece or the second clamping piece, when the first locking piece is clamped with the first clamping piece, the handle frame is in the first use position, and when the first locking piece is clamped with the second clamping piece, the handle frame is in the second use position.

In one embodiment, when the handle frame is in the first use position, the top of the handle frame is located on a first side of the wheel frame, and when the handle frame is in the second use position, the top of the handle frame is located on a second side of the wheel frame, wherein the first side and the second side are disposed opposite to each other with respect to a traveling direction of the cart frame.

In one embodiment, the first locking piece is provided with a locking part, the first clamping piece and the second clamping piece are both provided with a matched locking part which is suitable for being clamped with the locking part, the first locking piece is movably arranged on the handlebar frame and is provided with a first locking position and a first unlocking position, when the first locking piece is positioned at the first locking position, the locking part is clamped with the matched locking part to limit the handlebar frame to be switched between the first using position and the second using position, and when the first unlocking piece is positioned at the first unlocking position, the locking part is separated from the matched locking part to allow the handlebar frame to be switched between the first using position and the second using position.

In one embodiment, the reversing locking mechanism further comprises a first driving piece movably arranged on the handlebar frame and connected with the first locking piece, and a first traction piece respectively connected with the first driving piece and the first locking release piece, wherein when the first locking release piece rotates, the first locking release piece drives the first driving piece to move through the first traction piece so as to drive the first locking piece to move from the first locking position to the first locking release position.

In one embodiment, the handle bar and the wheel frame are pivotally connected at a first pivot point such that the handle bar has a first use position and a third use position relative to the wheel frame, and when the handle bar is in the first use position, the handle bar and the wheel frame are spaced apart from each other about the first pivot point such that the stroller frame is in the deployed state, and when the handle bar is in the third use position, the handle bar and the wheel frame are adjacent to each other about the first pivot point such that the stroller frame is in the stowed state.

In one embodiment, the folding locking mechanism comprises a second locking piece which can move relative to the handlebar frame and has a second locking position and a second unlocking position, the wheel frame comprises a rear wheel frame and a first transmission piece, one end of the first transmission piece is pivoted with the rear wheel frame, the other end of the first transmission piece is pivoted with the handlebar frame at the first pivot point, when the second locking piece is in the second locking position, the second locking piece is clamped with the first transmission piece to limit the handlebar frame to pivot relative to the first transmission piece so as to limit the handlebar frame to switch between the first using position and the third using position, and when the second locking piece is in the second unlocking position, the second locking piece is separated from the first transmission piece so as to allow the handlebar frame to pivot relative to the first transmission piece so as to allow the handlebar frame to switch between the first using position and the third using position.

In one embodiment, the first transmission member has a first recess and a second recess, the second locking member is engaged with the first recess when the cart frame is in the unfolded state, and the second locking member is engaged with the second recess when the cart frame is in the folded state.

In one embodiment, the folding locking mechanism further comprises a second driving component which is movably arranged on the handlebar frame and is in driving fit with the second locking component, a second traction component which is respectively connected with the second driving component and the second locking component, and when the second locking component rotates, the second locking component drives the second driving component to move through the second traction component so as to drive the second locking component to move from the second locking position to the second locking position.

The application provides a release lock mechanism which is suitable for a trolley frame, wherein the trolley frame comprises an upper trolley frame, a lower trolley frame and a height adjustment locking mechanism arranged between the upper trolley frame and the lower trolley frame, the upper trolley frame and the lower trolley frame are limited or allowed to move relatively through the height adjustment locking mechanism, the wheel seat is rotatably connected to the wheel frame, the wheel locking mechanism is arranged between the wheel frame and the wheel seat and used for limiting or allowing the wheel seat to rotate relative to the wheel frame, the release lock mechanism comprises a first release lock piece, a second release lock piece and an operation piece, the first release lock piece is rotatably arranged on the trolley frame and is in driving connection with the wheel locking mechanism so as to allow the wheel seat to rotate relative to the wheel frame, the second release lock piece is rotatably arranged on the trolley frame and is in driving connection with the height adjustment locking mechanism so as to allow the upper trolley frame to move relative to the lower trolley frame, and the operation piece is movably arranged on the trolley frame so as to selectively release the first release lock piece.

In one embodiment, the first locking member is provided with a first connecting portion, the first connecting portion and the rotation center of the first locking member are arranged in a staggered mode, the first connecting portion is used for connecting the wheel locking mechanism, the second locking member is provided with a second connecting portion, the second connecting portion and the rotation center of the second locking member are arranged in a staggered mode, and the second connecting portion is used for connecting the height adjusting locking mechanism.

The application also provides a trolley frame which comprises a trolley frame, a wheel carrier, a trolley seat, a wheel locking mechanism and a release locking mechanism, wherein the trolley frame comprises an upper trolley frame, a lower trolley frame and a height adjusting locking mechanism arranged between the upper trolley frame and the lower trolley frame, the upper trolley frame and the lower trolley frame are limited or allowed to move relatively through the height adjusting locking mechanism, the wheel seat is rotatably connected to the wheel carrier, the wheel locking mechanism is arranged between the wheel carrier and the wheel seat and used for limiting or allowing the wheel seat to rotate relative to the wheel carrier, and the release locking mechanism is arranged on the trolley frame and is respectively in driving connection with the wheel locking mechanism and the height adjusting mechanism so as to allow the wheel seat to rotate relative to the wheel carrier and the upper trolley frame to move relative to the lower trolley frame.

In one embodiment, the wheel locking mechanism comprises a first locking recess provided in the wheel base, a first locking member movably provided in the wheel carrier and adapted to be in locking engagement with the first locking recess, and a first traction member connected between the first lock release member and the first locking member, wherein the wheel base is restrained from rotating relative to the wheel carrier when the first locking member extends into the first locking recess to be in locking engagement, and the wheel base is permitted to rotate relative to the wheel carrier when the first lock release member drives the first locking member to retract from the first locking recess to be out of engagement by the first traction member.

In one embodiment, the first traction member is disposed within the handlebar and the wheel frame and passes through the height adjustment locking mechanism.

In one embodiment, the height adjustment locking mechanism includes a support base, the support base is provided with a first penetrating channel, the first penetrating channel is a U-shaped channel, and one end of the first traction member, which is far away from the first release locking member, extends into the first traction member from one port of the U-shaped channel and extends out from the other port of the U-shaped channel, so that the first traction member is disposed around the support base.

In one embodiment, the upper carriage can slide relative to the lower carriage, the height-adjusting locking mechanism comprises a second locking part arranged on the lower carriage, a second locking component movably arranged on the upper carriage and suitable for being in locking fit with the second locking part, and a second traction piece connected between the second locking component and the second locking component, when the second locking component stretches into the second locking part to be in locking fit, the upper carriage is limited to slide relative to the lower carriage, and when the second locking component is driven by the second traction piece to retract from the second locking component to be out of locking fit with the second locking part, the upper carriage is allowed to slide relative to the lower carriage.

In one embodiment, the height adjusting and locking mechanism further comprises a supporting seat, wherein the supporting seat is provided with a first penetrating channel and a second penetrating channel, the first penetrating channel is a U-shaped channel, the second penetrating channel is a straight-line channel, the second traction piece is accommodated in the straight-line channel, and the wheel locking mechanism comprises a first traction piece which is arranged in the wheel frame and the handlebar frame and penetrates through the U-shaped channel.

In one embodiment, the height adjustment locking mechanism comprises a first connecting seat connected with the upper handlebar frame, a second connecting seat connected with the lower handlebar frame and pivoted with the first connecting seat, and a second locking piece axially movably arranged between the first connecting seat and the second connecting seat so as to limit or allow the first connecting seat and the second connecting seat to pivot relatively.

In one embodiment, the height adjustment locking mechanism further comprises a driving piece movably arranged on one side of the first connecting seat opposite to the second connecting seat or one side of the second connecting seat opposite to the first connecting seat, the driving piece axially penetrates through the first connecting seat or the second connecting seat and abuts against the second locking piece to drive the second locking piece to move, and a second traction piece connected with the driving piece and the second locking piece, and when the second locking piece is operated, the second traction piece drives the second locking piece to move through the driving piece so as to allow the first connecting seat to pivot relative to the second connecting seat.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Moreover, the figures are not drawn to a 1:1 scale, and the relative sizes of various elements are merely exemplary in the figures, and are not necessarily drawn to true scale. In the drawings:

FIG. 1 schematically illustrates a perspective view of a cart frame in an embodiment of the application;

FIG. 2 schematically illustrates a perspective view of another view of a cart frame in an embodiment of the application;

FIG. 3 is a cross-sectional view taken along line U1-U1 of FIG. 1, with the first locking member inserted into the locking recess;

FIG. 4 is a cross-sectional view taken along line U1-U1 of FIG. 1, wherein the first locking member is retracted from the locking recess;

FIG. 5 is a perspective view of a handlebar frame of the stroller frame of FIG. 1;

FIG. 6 is a perspective view of the stroller frame of FIG. 1 from another perspective;

FIG. 7 is a perspective view of the upper one of the handle bars of FIG. 5, wherein the movable member of the height adjustment locking mechanism is assembled with the second locking member;

FIG. 8 is a perspective view of the upper one of the handle bars of FIG. 5, with the movable member of the height adjustment locking mechanism separated from the second locking member;

FIG. 9 is an enlarged schematic view of the structure at circle A in FIG. 2;

FIG. 10 is an exploded view of the release mechanism of the handlebar frame of FIG. 5;

FIG. 11 is an enlarged schematic view of the structure at circle B in FIG. 10;

FIG. 12 is a schematic view of a portion of the release mechanism with the toggle member in a first position and the operating member in an initial position;

FIG. 13 is a schematic view of a portion of the release mechanism with the toggle member in a first position and the operating member in a release position;

FIG. 14 is a schematic view of a portion of the release mechanism with the toggle member in the second position and the operating member in the initial position;

FIG. 15 is a schematic view of a portion of the release mechanism with the toggle member in the second position and the operating member in the release position;

FIG. 16 is a perspective view of a stroller frame in an expanded state with a second locking member in a second locked position according to an embodiment of the present application;

FIG. 17 is a perspective view of a stroller frame in an unfolded state with a second locking member in a second unlocked position according to an embodiment of the present application;

FIG. 18 is a side view of the stroller frame shown in FIG. 16;

FIG. 19 is an enlarged schematic view of the structure at circle A of FIG. 16;

FIG. 20 is an enlarged schematic view of the structure at circle B of FIG. 17;

FIG. 21 is a cross-sectional view of the handle bar of the stroller frame shown in FIG. 16 with the operator in an initial position;

FIG. 22 is a cross-sectional view of the handle bar of the stroller frame shown in FIG. 16 with the operating member in an unlocked position and the first release member rotated;

FIG. 23 is a perspective view of a stroller frame according to an embodiment of the present application;

FIG. 24 is a side view of a stroller frame according to an embodiment of the present application in a collapsed configuration;

FIG. 25 is a cross-sectional view taken along line U1-U1 of FIG. 18;

FIG. 26 is an enlarged schematic view of the structure at circle C of FIG. 23;

FIG. 27 is an enlarged schematic view of the structure at circle D of FIG. 21;

FIG. 28 is a cross-sectional view of the handle bar of the stroller frame shown in FIG. 16 with the operating member in an unlocked position and the second release member rotated;

FIG. 29 is a perspective view of the release mechanism in the stroller frame shown in FIG. 16;

FIG. 30 is a schematic view of a portion of the release mechanism of FIG. 29;

FIG. 31 is an exploded view of the release mechanism of FIG. 29;

FIG. 32 is a cross-sectional view of the release mechanism of FIG. 30;

FIG. 33 is a perspective view of the stroller frame in an unfolded state according to the first embodiment of the present application;

FIG. 34 is a cross-sectional view of the stroller frame shown in FIG. 33;

FIG. 35 is a perspective view of the stroller frame of FIG. 33 in a collapsed condition;

FIG. 36 is a cross-sectional view of the stroller frame shown in FIG. 34;

FIG. 37 is a cross-sectional view of a vehicle handle frame of the cart frame of FIG. 33;

FIG. 38 is a perspective view of the release mechanism in the stroller frame shown in FIG. 33;

FIG. 39 is a schematic view of a portion of the release mechanism of FIG. 38;

FIG. 40 is an exploded view of the release mechanism of FIG. 38;

FIG. 41 is a cross-sectional view of the release mechanism of FIG. 37, wherein the first release member is rotated;

FIG. 42 is a cross-sectional view of the release mechanism of FIG. 37, wherein the second release member is rotated;

FIG. 43 is a cross-sectional view of the release mechanism of FIG. 39;

FIG. 44 is a perspective view of a vehicle handle bar according to another embodiment;

FIG. 45 is a perspective view of a stroller frame according to a second embodiment of the present application;

FIG. 46 is a side view of the handlebar frame of FIG. 45;

FIG. 47 is an exploded view of the handle portion of the vehicle of FIG. 45;

FIG. 48 is a cross-sectional view of the vehicle handle shown in FIG. 45 with the second locking member in the locked position;

FIG. 49 is a cross-sectional view of a portion of the vehicle handle bar arrangement of FIG. 45 with the second locking member in the unlocked position;

fig. 50 is a sectional view showing a partial structure of a handle bar of another embodiment.

Description of the reference numerals

1000X, a cart frame; 100X, release the lock mechanism; 110X, a first release; 111X, first connecting portion, 112X, first stopping projection, 120X, second releasing lock, 121X, second connecting portion, 122X, second stopping projection, 130X, operating member, 131X, first driving portion, 132X, second driving portion, 133X, third driving portion, 134X, fourth driving portion, 135X, stopper post, 140X, safety lock, 141X, toggle member, 1411X, push portion, 142X, first connecting member, 1421X, first abutting portion, 1422X, third abutting portion, 1423X, first avoiding portion, 143X, second connecting member, 1431X, second abutting portion, 1432X, fourth abutting portion, 1433X, second avoiding portion, 144X, third avoiding portion, 150X, first elastic member, 160X, second elastic member, 171X, first fixed cover 171X1, operating hole, 172X, second fixed cover, 200X, 2121X, carriage frame, 211X, first connecting member, 1421X, first abutting portion, 1422X, second abutting portion, 1423X, second abutting portion, 1433X, second abutting portion, 1432X, first elastic member, 160X, second avoiding portion, 144X, third avoiding portion, 150X, first elastic member, 160X, first elastic member, 171X, operating hole, 172X, second fixing cover, 200X, second fixed cover, 200X, second fixed frame, 200X, second carriage frame, 200X, carriage frame, 200X, carriage frame, 200X carriage frame, carriage, 212X carriage, carriage frame, carriage frame, carriage, carriage,;

1000Y, a cart frame; 100Y, a handlebar frame; 110Y, support tube; the safety brake device comprises a 120Y, a push handle, 130Y, a fixed support seat, 140Y, a mounting seat, 200Y, a wheel carrier, 210Y, a front wheel carrier, 220Y, a rear wheel carrier, 230Y, a first transmission part, 240Y, a handrail part, 250Y, a second transmission part, 260Y, a third transmission part, 270Y, a wheel, 300Y, a reversing locking mechanism, 310Y, a first locking part, 311Y, a locking part, 320Y, a first clamping part, 330Y, a second clamping part, 301Y, a locking part, 340Y, a first driving part, 350Y, a first traction part, 360Y, a first connecting part, 370Y, a first resetting part, 400Y, a receiving locking mechanism, 410Y, a second locking part, 420Y, a second driving assembly, 421Y, a second sliding sleeve, 422Y, a second driving part, 430Y, a second traction part, 440Y, a second resetting part, 450Y, a second connecting part, 500Y, a locking mechanism, 510Y, a first locking part, a first releasing part, 520Y, a second locking part, a second sliding part, 53Y, a first connecting part, a second opening part, 35Y, a first sliding part, a second opening part, 35Y, a second opening part, a first sliding part, a second opening part, a first opening part, a second opening part, a first opening part, a second opening part, a third opening part, a fifth opening part, a fifth opening part, a second opening part, opening, a second opening part, a, opening, a second opening, a second opening part, opening, a second opening, second fifth a second fifth, second fifth, fifth;

1000Z, a cart frame; 100Z, a handlebar frame; 110Z, a boarding hand rack; 111Z, the first support tube, 112Z, the push handle tube, 120Z, the lower carriage, 121Z, the second support tube, 130Z, the height adjustment locking mechanism, 131Z, the second locking component, 1311Z, the second locking piece, 13111Z, the locking gear, 1312Z, the driving piece, 132Z, the first locking part, 133Z, the second locking part, 1331Z, the bottom second locking part, 1332Z, the middle second locking part, 1333Z, the top second locking part, 1341Z, the cover body, 1342Z, the penetrating space, 135Z, the third resetting piece, 136Z, the support seat, 1361Z, the first guiding part, 1363Z, the first pushing inclined plane, 1364Z, the second inclined plane, 1365Z, the first penetrating channel, 1366Z, the second penetrating channel, 137Z, the second traction piece, 138Z, the first connecting seat 1381Z, the first cavity 1382Z, the first locking groove, the second locking part, the first 35Z, the second 35Z, the front and back end portion, the front end portion, the back end portion, the front end portion, the back portion, the front end portion, the back portion, the front portion, the back end portion, and front portion, the front end portion, and back end portion of the front end portion, and front end portion of front end portion, and back, the vehicle wheel locking device comprises an operation hole, 382Z, a second fixed cover, 400Z, a first pivot seat, 500Z, a wheel locking mechanism, 510Z, a first locking piece, 520Z, a first locking concave part, 530Z, a second resetting piece, 540Z, a first traction piece, 600Z, a vehicle hand folding locking mechanism, 610Z, a clamping piece, 620Z, a second locking concave part, 630Z, a fixed seat, 640Z, a first resetting piece, alpha 1, a first included angle, alpha 2, a second included angle, alpha 3, a third included angle, alpha 4, a fourth included angle, F1, a first direction, F2 and a second direction.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

Fig. 1 and 2 illustrate a cart frame 1000X provided in accordance with some embodiments of the invention, the cart frame 1000X having a generally side-to-side symmetrical overall structure that may include a cart handle 200X, a wheel carriage 300X, a height adjustment locking mechanism 400X (see fig. 7 and 8), a stow locking mechanism 500X (see fig. 3 and 4), and a release locking mechanism 100X provided in accordance with some embodiments of the invention. While the cart frame 1000X is described below, the cart hand frame 200X, the wheel frame 300X, the height adjustment locking mechanism 400X, the folding locking mechanism 500X, and the lock release mechanism 100X will be described one by one.

With continued reference to fig. 1 and 2, the stroller frame 1000X can be used as a frame for a child stroller, pet stroller, cargo stroller, or the like. Wherein the wheel frame 300X and the handlebar frame 200X are pivotally connected to each other such that the stroller frame 1000X is switchable between an unfolded state and a collapsed state (in other embodiments, the collapsed state may also be referred to as a collapsed state or a folded state). Specifically, the handle 200X includes an upper handle 210X and a lower handle 220X that are relatively movable, and an end of the lower handle 220X remote from the upper handle 210X is pivotally connected to the wheel frame 300X. More specifically, the wheel frame 300X includes a front wheel frame 310X and a rear wheel frame 320X that are pivotally connected, and the lower handle frame 220X is pivotally connected to one of the front wheel frame 310X and the rear wheel frame 320X. For example, in the present embodiment, the lower handle 220X is pivotally connected to the front wheel frame 310X. The specific structure of the wheel frame 300X (including the front wheel frame 310X and the rear wheel frame 320X) and the handle frame 200X (including the upper handle frame 210X and the lower handle frame 220X) will be further described one by one.

Referring to fig. 1 and 2, in an embodiment, the front wheel frame 310X has, for example, a U-shaped structure including front bars 311X on both left and right sides and a front cross bar 312X connected between the two front bars 311X. The front rail 312X extends substantially along a first direction F1, which corresponds to the left-right direction F1. The front cross bar 312X may also be used as a foot pedal when the stroller frame 1000X is used as a frame for a stroller.

In one embodiment, at least one front wheel mount 313X is mounted to the bottom of the front wheel mount 310X. Specifically, in the present embodiment, as shown in fig. 1 and 2, two front wheel seats 313X are mounted at the bottom of the front wheel frame 310X, and the two front wheel seats 313X are arranged at intervals in the left-right direction (i.e., the first direction F1). More specifically, two front wheel seats 313X are installed at both left and right ends of the front rail 312X, and two front bars 311X are respectively connected to the front wheel seats 313X on the same side. Each front wheel mount 313X is used to mount a front wheel 610X to make the cart frame 1000X movable, respectively. Of course, in another alternative embodiment, the front wheel frame 310X may have other embodiments, for example, the front wheel frame 310X includes only two front bars 311X, one ends of the two front bars 311X are connected to form a V-shaped structure, and the bottom of the front wheel frame 310X may be centrally provided with a front wheel seat 313X. Alternatively, for example, the front wheel frame 310X includes only two front bars 311X disposed substantially parallel to each other in the left-right direction, and the two front wheel seats 313X are connected to the two front bars 311X, respectively.

Unless specifically stated or limited otherwise, the terms of orientation such as "left" and "right" with respect to the cart frame 1000X in the various embodiments of the present invention are based on the "left" and "right" orientation of the cart frame 1000X in normal operation, and the "left" and "right" directions are schematically illustrated by arrows L, R in the figures. These directional terms are used only to make the description of the embodiments of the present invention clearer and are not used to unduly limit the scope of the present invention.

In an embodiment, the rear wheel frame 320X may have a U-shaped structure, for example, and includes two rear bars 321X located at both left and right sides and a rear cross bar (not shown) connected between the two rear bars 321X, and extending along the first direction F1. Of course, in another alternative embodiment, the rear wheel frame 320X may have other embodiments, for example, the rear wheel frame 320X includes only two rear bars 321X, and one ends of the two rear bars 321X are connected to have a V-shaped structure. Specifically, referring to fig. 1 and 2, in the present embodiment, the rear wheel frame 320X may include two rear bars 321X disposed substantially in parallel in the left-right direction, and a reinforcing bar 322X connected between the two rear bars 321X. In this way, the structural stability of the rear wheel frame 320X can be improved. Specifically, the bottom ends of the two rear bars 321X are respectively provided with a rear wheel seat 323X. Each rear wheel mount 323X is used to mount a rear wheel 620X to make the cart frame 1000X movable, respectively. In this embodiment, the rear wheel 620X is larger in size than the front wheel 610X to make the overall structure of the stroller frame 1000X more stable. Of course, in another alternative embodiment, the rear wheel 620X may be the same size as or larger than the front wheel 610X.

Specifically, in the present embodiment, the upper ends of the two rear rods 321X are pivotally connected to the front rods 311X on the same side respectively and form pivot points, that is, the rear rods 321X on the same side can rotate around the corresponding pivot points with respect to the front rods 311X on the same side. In this way, the volume of the wheel frame 300X can be changed.

Referring to fig. 1 and 2, the cart hand frame 200X includes an upper cart hand frame 210X and a lower cart hand frame 220X, which are relatively movable, for example, the upper cart hand frame 210X can be slidably sleeved with the lower cart hand frame 220X, so that the height of the cart hand frame 200X relative to the ground can be changed, so that users with different heights can conveniently hold the cart hand frame 1000X, and the applicability of the cart hand frame is improved. Specifically, the upper handle 210X has, for example, a U-shaped structure including two first support tubes 211X and a push tube 212X connected between the two first support tubes 211X. The first support tubes 211X are straight tubes, and the push tube 212X has a U-shaped structure and is connected between the two first support tubes 211X for being held by a user to push the cart frame 1000X. More specifically, the lower hand rack 220X includes, for example, two second support tubes 221X, wherein upper ends of the two second support tubes 221X are slidably sleeved with the first support tube 211X on the same side, respectively, and lower ends of the two second support tubes 221X are pivotally connected with the front rod 311X on the same side, respectively. It should be noted that, the two second support tubes 221X are respectively slidably sleeved with the first support tube 211X on the same side, which includes two embodiments in which the second support tube 221X is sleeved outside the first support tube 211X, or the first support tube 211X is sleeved outside the second support tube 221X. Specifically, in the present embodiment, the principle of cooperation of the second support tube 221X and the first support tube 211X is specifically described by taking the case that the two support tubes are sleeved outside.

To prevent the cart frame 200X from rotating freely relative to the wheel frame 300X, so that the cart frame 1000X can be stably maintained in the unfolded state, in an embodiment, the cart frame 200X and the wheel frame 300X can be restricted or allowed to pivot relative to each other by the folding locking mechanism 500X. In addition, to prevent the upper carriage 210X from moving randomly relative to the lower carriage 220X, so that the carriage 200X can be stably maintained at a certain height, in one embodiment, the upper carriage 210X and the lower carriage 220X can be restrained or allowed to move relative to each other by the height adjustment locking mechanism 400X. The specific structure and operation of the folding locking mechanism 500X and the height adjustment locking mechanism 400X are further described below.

Referring to fig. 3 and 4, in one embodiment, the fold-locking mechanism 500X includes a first locking member 510X and a securing member 520X. The fixing member 520X is provided with a locking recess 521X and is mounted on one of the wheel frame 300X or the lower handle 220X, and the first locking member 510X is movably provided on the other of the wheel frame 300X or the lower handle 220X and is operatively connected with the first releasing member 110X. For example, when the fixing member 520X is provided on the wheel frame 300X, the first locking member 510X is movably provided in the lower handle 220X. Or when the fixing member 520X is provided on the lower handle 220X, the first locking member 510X is movably provided on the wheel frame 300X. Specifically, in the present embodiment, the fixing member 520X is fixedly disposed in the front rod 311X of the front wheel frame 310X, and the first locking member 510X is movably disposed in the second support tube 221X of the lower handle frame 220X. When the first locking piece 510X is inserted into and locked to the concave portion 521X (see fig. 3), the lower handle 220X is restricted from pivoting with respect to the wheel frame 300X. When the first locking piece 510X is retracted from the locking recess 521X (see fig. 4), the lower handle 220X can pivot with respect to the wheel frame 300X.

In an embodiment, the folding locking mechanism 500X further includes a first traction member 530X (see fig. 3 and 4), and the first traction member 530X is used to connect with the first locking member 510X. In this way, the user can drive the first locking member 510X out of the locking recess 521X by pulling the first pulling member 530X.

In an embodiment, the folding locking mechanism 500X further includes a third elastic member (not shown in the drawing), and the third elastic member abuts between the first locking member 510X and the lower handle 220X, so as to drive the first locking member 510X to return, so that the third elastic member constantly has a tendency to be inserted into the locking recess 521X. Specifically, the third elastic member may be an elastic member having elasticity, such as a spring or a leaf spring.

In this embodiment, in order to improve the stability of the folding locking mechanism 500X during locking, two folding locking mechanisms 500X are provided on the cart frame 1000X, and one folding locking mechanism 500X is provided between the front rod 311X and the second support tube 221X on the same side.

Referring to fig. 5-8, in one embodiment, height adjustment locking mechanism 400X includes a rider locking assembly 410X and a locking hole 420X. One of the upper and lower handle bars 210X, 220X is provided with a locking hole 420X and the other is provided with a handle lock assembly 410X. Specifically, in the present embodiment, the second support tube 221X in the lower handle 220X is provided with a locking hole 420X, the first support tube 211X in the upper handle 210X is provided with a handle lock assembly 410X, and the handle lock assembly 410X can be engaged with the locking hole 420X, so that when the first support tube 211X and the corresponding second support tube 221X are relatively moved to make the handle lock assembly 410X opposite to the locking hole 420X, the handle lock assembly 410X is inserted into the locking hole 420X to lock the upper handle 210X and the lower handle 220X. More specifically, the lock holes 420X are provided in plurality, and the plurality of lock holes 420X are provided at intervals along the sliding direction of the upper handle 210X with respect to the lower handle 220X. In this way, when the rider locking assemblies 410X are inserted into different locking holes 420X, the upper rider rack 210X may be maintained at different heights relative to the lower rider rack 220X.

Referring to fig. 7 and 8, in one embodiment, the rider locking assembly 410X is disposed in the first support tube 211X of the upper rider rack 210X, as described above. The rider locking assembly 410X includes a moving member 411X and a second locking member 412X. Wherein the moving member 411X is movably disposed in the first support tube 211X of the upper handle 210X. Specifically, the moving member 411X is provided with a guide groove 4111X, and the guide groove 4111X extends obliquely with respect to the moving direction of the moving member 411X. The second locking piece 412X has a guide post (not shown) that protrudes into the guide groove 4111X and slidably engages with the guide groove 4111X to be able to protrude into or retract from the locking hole 420X. Specifically, in one embodiment, as shown in fig. 7 and 8, the rider locking assembly 410X further includes a support seat 413X, the support seat 413X being fixedly disposed within the first support tube 211X, and the second locking member 412X being movably disposed on the support seat 413X to be capable of being inserted into the locking hole 420X or retracted from the locking hole 420X. More specifically, the rider locking assembly 410X further includes a fourth elastic member 414X (see fig. 8), the fourth elastic member 414X abutting between the support 413X and the moving member 411X for driving the moving member 411X to return so that the second locking member 412X constantly has a tendency to be inserted into the locking hole 420X. Specifically, the fourth elastic member 414X may be an elastic member having elasticity such as a spring or a leaf spring.

In one embodiment, the height adjustment locking mechanism 400X further includes a second traction member 430X (see fig. 12), and the second traction member 430X is used to connect the moving member 411X. In this way, the user can drive the moving member 411X to move by pulling the second pulling member 430X, thereby indirectly driving the second locking member 412X to retract from the locking hole 420X.

In this embodiment, in order to improve the stability of the height adjustment locking mechanism 400X during locking, two height adjustment locking mechanisms 400X are provided on the cart frame 1000X, and one of the height adjustment locking mechanisms 400X is provided between the first support tube 211X and the second support tube 221X on the same side.

In order to improve convenience for a user to unlock the folding locking mechanism 500X and the height adjustment locking mechanism 400X, in some embodiments provided by the present invention, the unlocking mechanism 100X is capable of performing unlocking operations for the folding locking mechanism 500X and the height adjustment locking mechanism 400X, respectively. Specifically, as shown in fig. 9 and 10, the lock release mechanism 100X includes a first lock release member 110X, a second lock release member 120X, and an operation member 130X. The first lock release member 110X is rotatably disposed on the cart frame 1000X, for example, may be disposed on the cart frame 200X or the wheel frame 300X. The first release lock 110X is drivingly connected to the fold lock mechanism 500X to allow the lower handle 220X to pivot relative to the wheel carriage 300X. Specifically, the first release lock 110X is drivingly connected to the first lock 510X in the folding locking mechanism 500X. The second release lock 120X is rotatably provided on the cart frame 1000X, and may be provided on the cart frame 200X or the wheel frame 300X, for example. The second release 120X is drivingly connected to the height adjustment locking mechanism 400X to allow movement of the upper handle 210X relative to the lower handle 220X. Specifically, the second lock release member 120X is drivingly connected to the moving member 411X in the height adjustment locking mechanism 400X. The operating member 130X is movably disposed on the cart frame 1000X and adapted to drive rotation of either of the first lock release member 110X and the second lock release member 120X.

Since the first release member 110X is rotatably disposed on the cart frame 1000X and is in driving connection with the first lock member 510X, the second release member 120X is rotatably disposed on the cart frame 1000X and is in driving connection with the moving member 411X, and the operating member 130X is movable and is used to drive either one of the first release member 110X and the second release member 120X to rotate. Therefore, the user can control the first lock release member 110X to rotate by driving the movement of the operation member 130X, thereby indirectly controlling the first lock member 510X in the folding locking mechanism 500X, when the first lock member 510X is inserted into the locking recess 521X, the cart frame 1000X can be maintained in the unfolded state, and when the first lock member 510X is withdrawn from the locking recess 521X, the cart frame 1000X can be switched from the unfolded state to the locked state. Meanwhile, the user can also control the second release locking member 120X to rotate by driving the movement of the operating member 130X, so as to indirectly control the moving member 411X and the second locking member 412X in the height adjustment locking mechanism 400X, when the second locking member 412X is inserted into the locking hole 420X, the upper vehicle hand frame 210X and the lower vehicle hand frame 220X cannot slide relatively, and when the second locking member 412X is retracted from the locking hole 420X, the upper vehicle hand frame 210X and the lower vehicle hand frame 220X can slide relatively, so that the height of the vehicle hand frame 200X can be adjusted. Just because the user only needs to operate the lock release mechanism 100X to control different locking mechanisms respectively, the operation convenience of the user is improved.

In order to facilitate the user's operation of the lock release mechanism 100X, as shown in fig. 9 to 11, the lock release mechanism 100X is provided on the push tube 212X of the upper handle 210X. Specifically, the first lock release member 110X and the second lock release member 120X are both disc-shaped, and are rotatably mounted on the push tube 212X by a connecting member such as a shaft pin. More specifically, the first locking member 110X is provided with a first connecting portion 111X, and the rotation centers of the first connecting portion 111X and the first locking member 110X are offset, for example, may be disposed in a straight line or may be disposed in a non-straight line, but not limited thereto. The first connection portion 111X is for connecting and receiving the engagement locking mechanism 500X. Specifically, referring to fig. 3, 12 and 13, the first connection portion 111X is connected to the first locking member 510X in the folding locking mechanism 500X through the first traction member 530X. When the first lock release member 110X rotates around its rotation center, the first connection portion 111X rotates synchronously around the rotation center of the first lock release member 110X, and further drives the first traction member 530X to move to pull the first lock release member 110X to move and retract from the locking recess 521X. Similarly, the second locking element 120X is provided with a second connecting portion 121X, and the rotation centers of the second connecting portion 121X and the second locking element 120X are offset, for example, may be disposed in a straight line or non-straight line, but not limited thereto. The second connection portion 121X is used to connect the height adjustment locking mechanism 400X. Specifically, referring to fig. 14 and 15, the second connecting portion 121X is connected to the moving member 411X in the height adjustment locking mechanism 400X by the second traction member 430X. When the second lock release member 120X rotates around its rotation center, the second connecting portion 121X rotates synchronously around the rotation center of the second lock release member 120X, so as to drive the second traction member 430X to move to pull the moving member 411X to move, and under the action of the guiding slot 4111X, the first locking member 510X is driven to move to retract from the locking hole 420X.

Specifically, in the present embodiment, the first traction member 530X and the second traction member 430X may be both traction ropes, for example. More specifically, the first release lock 110X is provided with two first connection portions 111X, and the second release lock 120X is provided with two second connection portions 121X. The two first connection portions 111X are connected to the two first traction members 530X, respectively, and the two second connection portions 121X are connected to the two second traction members 430X, respectively. Thus, when the first locking member 110X rotates, the two first locking members 510X can be simultaneously controlled to move to retreat from the corresponding locking recesses 521X. When the second locking member 120X rotates, the two moving members 411X can be controlled to move at the same time, so as to control the two second locking members 412X to retract from the corresponding locking holes 420X.

Referring to fig. 9 and 12-15, the lock release mechanism 100X further includes a safety lock 140X (in other embodiments, the safety lock 140X may also be referred to as a frame folding safety lock 140X). The safety lock 140X is movably disposed on the cart frame 1000X and is switchable between a first position and a second position. When the safety lock 140X is pushed to be located at the first position, the operating member 130X is drivingly connected to the first lock release member 110X through the safety lock 140X. When the safety lock 140X is pushed to be located at the second position, the operating member 130X is drivingly connected to the second unlocking member 120X through the safety lock 140X. Specifically, when the user needs to unlock the folding locking mechanism 500X to switch the cart frame 1000X from the unfolded state to the folded state, the safety lock 140X can be moved to the first position, so that the first unlocking member 110X can be rotated by operating the operating member 130X. When the user needs to release the locking mechanism 400X to adjust the height of the handlebar 200X, the safety lock 140X is moved to the second position, so that the second release member 120X can be rotated by operating the operating member 130X.

Referring to fig. 12 to 15, in an embodiment, the safety lock 140X includes a toggle member 141X, a first linkage member 142X, and a second linkage member 143X. Wherein the toggle member 141X is movably disposed on the cart frame 1000X (e.g., the push tube 212X) along the first direction F1 and is switchable between a first position and a second position. The first linkage member 142X is movably connected to the toggle member 141X along the second direction F2, and is in driving connection with the first lock release member 110X. The second linkage member 143X is movably connected to the toggle member 141X along the second direction F2, and is in driving connection with the second lock release member 120X. The first direction F1 intersects the second direction F2, and the operating member 130X is movable along the second direction F2 relative to the cart frame 1000X. Specifically, when the toggle member 141X is located at the first position, the operating member 130X can be operated to push the first linking member 142X to move along the second direction F2, so as to rotate the first locking member 110X. When the toggle member 141X is located at the second position, the operating member 130X can be operated to push the second linking member 143X to move along the second direction F2, so as to rotate the second lock release member 120X.

With continued reference to fig. 12-15, in one embodiment, the first linkage 142X has a first abutment 1421X and the second linkage 143X has a second abutment 1431X. The operating member 130X has a first driving portion 131X and a second driving portion 132X provided at intervals. As shown in fig. 12 and 13, when the toggle 141X is located at the first position, the first abutting portion 1421X is located at the first driving portion 131X, and the second abutting portion 1431X is offset from the second driving portion 132X. In this way, when the operating member 130X moves upward along the second direction F2, the first driving portion 131X can abut against the first abutting portion 1421X, so as to push the first linking member 142X to move along the second direction F2, and further drive the first releasing member 110X to rotate, thereby finally releasing the lock of the folding locking mechanism 500X. Meanwhile, since the second abutting portion 1431X is offset from the second driving portion 132X, when the operating member 130X moves upward along the second direction F2, the second driving portion 132X does not contact the second abutting portion 1431X, so that the second linking member 143X and the second releasing member 120X can both remain stationary, i.e. the height adjustment locking mechanism 400X is not affected when the operating member 130X is operated. As shown in fig. 14 and 15, when the toggle 141X is located at the second position, the second abutment portion 1431X is located at the second driving portion 132X, and the first abutment portion 1421X is offset from the first driving portion 131X. In this way, when the operating member 130X moves upward along the second direction F2, the second driving portion 132X can abut against the second abutting portion 1431X, so as to push the second linkage member 143X to move along the second direction F2, and further drive the second lock release member 120X to rotate, thereby finally realizing the release of the height adjustment locking mechanism 400X. Meanwhile, since the first abutting portion 1421X is offset from the first driving portion 131X, when the operating member 130X moves upward along the second direction F2, the first driving portion 131X does not contact the first abutting portion 1421X, so that both the first linking member 142X and the first releasing member 110X can remain stationary, i.e. the operating member 130X is operated, which does not affect the folding locking mechanism 500X.

Referring again to fig. 12 to 15, in an embodiment, the operation member 130X further has a third driving portion 133X and a fourth driving portion 134X. The third driving portion 133X is disposed at a distance from the fourth driving portion 134X and is located between the first driving portion 131X and the second driving portion 132X. The first linkage member 142X and the second linkage member 143X are disposed at a distance from each other, and a third avoiding portion 144X is formed therebetween. Specifically, the first linkage 142X further has a third contact portion 1422X, and the second linkage 143X further has a fourth contact portion 1432X. As shown in fig. 12 and 13, when the toggle 141X is located at the first position, the pair of third abutting portions 1422X is located at the third driving portion 133X, the pair of first abutting portions 1421X is located at the first driving portion 131X, and the pair of fourth driving portions 134X is located at the third avoiding portion 144X. Therefore, when the operating member 130X moves upward in the second direction F2, the first driving portion 131X can abut against the first abutting portion 1421X, and the third abutting portion 1422X can abut against the third driving portion 133X, thereby simultaneously pushing the first linking member 142X to move in the second direction F2. Meanwhile, in the process of moving the operating member 130X upwards along the second direction F2, the fourth driving portion 134X is gradually inserted into the third avoiding portion 144X, so that the situation that the second linkage member 143X is driven to move when the toggle member 141X is located at the first position is avoided. As shown in fig. 14 and 15, when the toggle 141X is located at the second position, the pair of fourth abutting portions 1432X is located at the fourth driving portion 134X, the pair of second abutting portions 1431X is located at the second driving portion 132X, and the pair of third driving portions 133X is located at the third escape portion 144X. Therefore, when the operating member 130X moves upward in the second direction F2, the second driving portion 132X can abut against the second abutting portion 1431X, and the fourth abutting portion 1432X can abut against the fourth driving portion 134X, thereby simultaneously pushing the second linkage member 143X to move in the second direction F2. Meanwhile, in the process of moving the operating member 130X upward along the second direction F2, the third driving portion 133X is gradually inserted into the third avoiding portion 144X, so that the situation that the first linking member 142X is driven to move when the toggle member 141X is located at the second position is avoided.

Referring to fig. 12 and 14, in an embodiment, the lock release mechanism 100X further includes a first elastic member 150X. The first elastic member 150X is abutted between the cart frame 1000X (e.g. the push tube 212X) and the striking member 141X, and is used for providing an elastic restoring force for the striking member 141X, so as to keep the striking member 141X in the first position or the second position. For example, when the first elastic member 150X is used to constantly maintain the toggle member 141X in the first position, if the locking mechanism 500X needs to be released, the operating member 130X may be directly operated (e.g. pressed or pushed upwards). If the locking mechanism 400X is to be released, the operating member 130X is operated after the toggle member 141X is moved to the second position. After the locking of the height adjustment locking mechanism 400X is completed, the toggle member 141X is released, and under the reset action of the first elastic member 150X, the toggle member 141X is automatically reset to the first position.

In one embodiment, as shown in fig. 12 and 14, a first relief portion 1423X is formed between the first abutment portion 1421X and the third abutment portion 1422X. A second escape portion 1433X is formed between the second abutment portion 1431X and the fourth abutment portion 1432X. Specifically, when the toggle member 141X is located at the first position and the operating member 130X is operated, the second avoidance portion 1433X is used to avoid the second driving portion 132X. When the toggle member 141X is located at the second position and the operating member 130X is operated, the first avoidance portion 1423X is configured to avoid the first driving portion 131X.

In one embodiment, one of the first linkage member 142X and the first lock release member 110X has a first guiding recess (not shown), and the other has a first mating protrusion (not shown). The first fitting protrusion is slidably disposed in the first guiding recess, and the first guiding recess extends along the first direction F1. Likewise, one of the second interlocking piece 143X and the second unlocking piece 120X has a second guiding recess (not shown in the figure), and the other has a second fitting projection (not shown in the figure). The second fitting protrusion is slidably disposed in the second guiding recess, and the second guiding recess extends along the first direction F1. Thus, when the toggle member 141X is switched between the first position and the second position along the first direction F1, it can drive the first linkage member 142X and the second linkage member 143X to move left and right along the first direction F1 at the same time to keep the first release member 110X and the second release member 120X stationary, at the same time, when the first linkage member 142X moves up and down along the second direction F2, the first linkage member 142X can drive the first release member 110X to rotate, and when the second linkage member 143X moves up and down along the second direction F2, the second linkage member 143X can drive the second release member 120X to rotate.

In one embodiment, the operating member 130X has an initial position (see fig. 12 and 14) and a release position (see fig. 13 and 15) when moving in the second direction F2. When the operating member 130X is located at the initial position, the operating member 130X can be operated to move to push the first linkage member 142X or the second linkage member 143X to move. In other words, when the operating element 130X is at the initial position, a gap or just contact may be left between the first driving portion 131X and the first abutting portion 1421X and between the third driving portion 133X and the third abutting portion 1422X (or between the second driving portion 132X and the second abutting portion 1431X and between the fourth driving portion 134X and the fourth abutting portion 1432X) on the operating element 130X, so that the first linkage 142X (or the second linkage 143X) may be pushed upward by pushing or pressing the operating element 130X upward. When the operating member 130X is located at the lock releasing position, the operating member 130X pushes against the first linkage member 142X or the second linkage member 143X.

Referring to fig. 11 to 13, in an embodiment, the lock release mechanism 100X further includes a second elastic member 160X, where the second elastic member 160X abuts between the cart frame 1000X and the operating member 130X, for providing an elastic restoring force to the operating member 130X so as to maintain the operating member 130X in the initial position. The second elastic member 160X may be an elastic member having elasticity such as a spring or a leaf spring. Specifically, in the present embodiment, as shown in fig. 9 and 11, the second elastic member 160X is a spring, the operation member 130X is provided with a limiting post 135X, the spring is sleeved outside the limiting post 135X, and two ends of the spring respectively abut against the operation member 130X and the pushing tube 212X.

Referring to fig. 9 and 11, in one embodiment, one of the first lock release member 110X and the cart frame 1000X is provided with a first stopper concave portion 2121X, the other is provided with a first stopper convex portion 112X, the first stopper convex portion 112X abuts against one side wall of the first stopper concave portion 2121X when the operation member 130X is switched to the initial position, and the first stopper convex portion 112X abuts against the other side wall corresponding to the first stopper concave portion 2121X when the operation member 130X is switched to the lock release position. In this way, the rotation direction of the first release lock 110X can be controlled, and the problem that the first release lock 110X cannot pull the first lock 510X out of the locking recess 521X by the first traction member 530X when rotating due to the rotation not according to the preset steering direction is avoided. Further, the distance between the opposite side walls of the first stopper concave portion 2121X defines a rotation range of the first stopper convex portion 112X about the rotation center of the first lock release 110X. Specifically, the push tube 212X is provided with a first stop concave portion 2121X, and the first release lock 110X is provided with a first stop convex portion 112X. Likewise, one of the second lock release member 120X and the cart frame 1000X is provided with a second stopper concave portion 2122X, the other is provided with a second stopper convex portion 122X, the second stopper convex portion 122X abuts against one side wall of the second stopper concave portion 2122X when the operation member 130X is switched to the initial position, and the second stopper convex portion 122X abuts against the other side wall corresponding to the second stopper concave portion 2122X when the operation member 130X is switched to the lock release position. In this way, the rotation direction of the second lock release member 120X can be controlled, so that the second lock release member 120X cannot be moved by pulling the moving member 411X by the second pulling member 430X when rotated due to the fact that the second lock release member 120X does not rotate in the preset steering direction. Further, the distance between the opposite side walls of the second stopper concave portion 2122X defines a rotation range of the second stopper convex portion 122X about the rotation center of the second lock release 120X. Specifically, the push tube 212X is provided with a second stop concave portion 2122X, and the second lock release member 120X is provided with a second stop convex portion 122X.

Referring to fig. 6 and 11, in an embodiment, the lock release mechanism 100X further includes a first fixed cover 171X and a second fixed cover 172X. The first fixed cover 171X is disposed on top of the push tube 212X, the second fixed cover 172X is disposed on bottom of the push tube 212X, and the second fixed cover 172X is provided with a through hole for the operation member 130X to pass through. The first fixing cover 171X is coupled to the second fixing cover 172X and fixed to the push tube 212X. In this way, the operating element 130X and other parts can be restricted, and the operating element 130X and other parts can be prevented from being separated from the push tube 212X. In addition, the first fixing cover 171X and the second fixing cover 172X are covered outside the first lock release member 110X, the second lock release member 120X and the safety lock 140X, so that the lock release mechanism 100X and the cart frame 1000X can be simplified and beautified. Specifically, as shown in fig. 6, the first fixed cover 171X is provided with an operation hole 1711X, and the toggle member 141X is provided with a pushing portion 1411X, and the pushing portion 1411X may pass through the operation hole 1711X to be held by a user, and the user may change the position of the toggle member 141X by pushing the pushing portion 1411X.

Fig. 16 and 17 illustrate a cart frame 1000Y provided according to some embodiments of the invention, the cart frame 1000Y having a generally side-to-side symmetrical overall structure that may be used as a frame for a child cart, pet cart, cargo cart, or the like. For example, in the present embodiment, the stroller frame 1000Y is used as a frame of a stroller to explain the structure and the operation principle thereof.

Referring to fig. 16-18, in one embodiment, a cart frame 1000Y may include, for example, a cart handle 100Y, a wheel frame 200Y, a reverse locking mechanism 300Y (see fig. 19 and 20), a fold locking mechanism 400Y (see fig. 19 and 20), and a lock release mechanism 500Y provided in accordance with some embodiments of the invention. Since the cart frame 1000Y has a symmetrical structure, the cart frame 1000Y will be described in detail below mainly by taking one side as an example, and the cart hand frame 100Y, the wheel frame 200Y, the reversing locking mechanism 300Y, the folding locking mechanism 400Y, and the unlocking mechanism 500Y will be described together.

With continued reference to fig. 16-18, in one embodiment, the cart frame 100Y is rotatably disposed on the wheel frame 200Y such that the cart frame 100Y can be rotated relative to the wheel frame 200Y for reversing, or the cart frame 100Y can be rotated relative to the wheel frame 200Y for collapsing to enable the cart frame 1000Y to be switched between an expanded state (see fig. 16 and 18) and a collapsed state (in other embodiments, the collapsed state may also be referred to as a collapsed state or a folded state) (see fig. 23 and 24). In one embodiment, as shown in fig. 16-18, the handlebar 100Y is pivotally connected to the wheel frame 200Y at a first pivot point A1 to provide the handlebar 100Y with a first use position (see fig. 16) and a second use position (not shown) relative to the wheel frame 200Y. Specifically, the handlebar 100Y is pivotable relative to the first pivot point A1 to enable the handlebar 100Y to be switched between the first use position and the second use position. In this embodiment, the top of the cart handle 100Y is located on a first side of the wheel frame 200Y when the cart handle 100Y is in the first use position, as viewed in conjunction with the orientation of the cart frame 1000Y. When the handle 100Y is in the second use position, the top of the handle 100Y is located on the second side of the wheel frame 200Y. Wherein the first side and the second side are disposed opposite to each other with respect to a traveling direction (i.e., a front-rear direction) of the cart frame 1000Y.

Unless specifically stated and limited otherwise, the terms of orientation of the cart frame 1000Y in the various embodiments of the present invention are based on the "left", "right", "front", "rear" orientation of the cart frame 1000Y in the first use position and traveling normally, and are schematically shown by arrows L, R "left", "right" and by arrows P, B "front", "rear". These directional terms are used only to make the description of the embodiments of the present invention clearer and are not used to unduly limit the scope of the present invention.

Referring to fig. 16 and 17, in an embodiment, the handle frame 100Y has, for example, a U-shaped structure including support tubes 110Y on the left and right sides and a push tube 120Y connected between the two support tubes 110Y. The support tubes 110Y are straight tube structures, and the push handle tube 120Y is U-shaped and connected between the two support tubes 110Y for being held by a user to push the cart frame 1000Y. Specifically, the push tube 120Y is connected to the top end of the support tube 110Y, and the bottom end of the support tube 110Y is pivotally connected to the first pivot point A1 with the wheel frame 200Y. Of course, in other embodiments, the supporting tube 110Y may be a non-straight tube structure, or the pushing tube 120Y may be a straight tube structure, which is not limited herein.

Referring to fig. 16 to 18, in an embodiment, the wheel frame 200Y may include a front wheel frame 210Y, a rear wheel frame 220Y, and a first transmission 230Y, for example. Wherein, the front wheel frame 210Y is pivoted with the rear wheel frame 220Y and forms a second pivot point A2, the front wheel frame 210Y is located in front of the rear wheel frame 220Y along the front-rear direction of the cart frame 1000Y, and the bottom of the front wheel frame 210Y and the bottom of the rear wheel frame 220Y are both connected with wheels 270Y. The first transmission member 230Y is pivoted between the rear wheel frame 220Y and the handle frame 100Y, and in particular, a first end of the first transmission member 230Y is pivoted with the handle frame 100Y and forms the first pivot point A1, and a second end of the first transmission member 230Y is pivoted with the rear wheel frame 220Y and forms the third pivot point A3. Thus, the above-described "first side" may be regarded as a side of the rear wheel frame 220Y away from the front wheel frame 210Y, and the "second side" may be regarded as a side of the front wheel frame 210Y away from the rear wheel frame 220Y, as viewed in conjunction with the wheel frame 200Y.

In one embodiment, the stroller frame 1000Y further includes a seat assembly (not shown) disposed on the wheel frame 200Y for seating a child. When the stroller frame 100Y is in the first use position (see fig. 16 and 18), if the user wants to push the stroller frame 1000Y to move by the stroller frame 100Y, the user needs to stand behind the stroller frame 1000Y to hold the stroller frame 100Y, and at this time, the user stands away from the face of the child. When the stroller frame 100Y is in the second use position, if the user wants to push the stroller frame 1000Y to move by the stroller frame 100Y, the user needs to stand in front of the stroller frame 1000Y to hold the stroller frame 100Y, and then the user stands facing the face of the child.

In order to avoid the hands frame 100Y from being turned at will with respect to the wheel frame 200Y for reversing, in other words, in order to enable the hands frame 100Y to be stably held in the first use position or the second use position. In one embodiment, the truck 100Y and the truck 200Y can be restrained or allowed to rotate relative to the truck 200Y by the reversing lock mechanism 300Y for reversing operations. Specifically, in the present embodiment, in order to improve the stability of the steering lock mechanism 300Y at the time of locking, two steering lock mechanisms 300Y are provided on the cart frame 1000Y and are respectively located on the left and right sides of the cart frame 1000Y.

Referring to fig. 16, 19 and 20, in an embodiment, a reversing locking mechanism 300Y is disposed between the handlebar 100Y and the wheel frame 200Y, and the reversing locking mechanism 300Y may include a first locking member 310Y, a first engaging member 320Y and a second engaging member 330Y. Wherein the first engaging member 320Y and the second engaging member 330Y are circumferentially spaced apart on the wheel frame 200Y about the first pivot point A1. The first locking member 310Y is disposed on the handlebar 100Y and adapted to engage with the first engaging member 320Y or the second engaging member 330Y. When the first locking member 310Y is engaged with the first engaging member 320Y, the handle 100Y is in the first use position. When the first locking member 310Y is engaged with the second engaging member 330Y, the handlebar 100Y is in the second use position.

Referring to fig. 19 to 22, in an embodiment, the first locking member 310Y has a locking portion 311Y, and the first engaging member 320Y and the second engaging member 330Y are each provided with a locking portion 301Y adapted to engage with the locking portion 311Y. One of the locking portion 311Y and the locking portion 301Y may be a protrusion, and the other may be a groove, where the protrusion and the groove may be locked and engaged by a concave-convex locking manner. Specifically, the first lock 310Y is movably provided on the handle 100Y and has a first lock position and a first unlock position. When the first locking member 310Y is in the first locking position, the locking portion 311Y engages with the locking portion 301Y to restrict the switching of the vehicle handle 100Y between the first use position and the second use position. When the first locking piece 310Y is in the first unlocking position, the locking portion 311Y is disengaged from the locking portion 301Y to allow the vehicle handle 100Y to be switched between the first use position and the second use position. More specifically, the first locking member 310Y is a sliding sleeve structure that is sleeved outside the support tube 110Y of the handlebar 100Y and is slidable along the length direction of the support tube 110Y, so as to be movable between a first locking position and a first unlocking position.

Referring to fig. 16, 21 and 22, in an embodiment, the reversing locking mechanism 300Y may further include a first driving member 340Y and a first traction member 350Y. The first driving member 340Y is movably disposed on the handlebar 100Y and connected to the first locking member 310Y, and the first traction member 350Y is connected to the first driving member 340Y. Thus, the first driving member 340Y is driven to move by the first traction member 350Y, so as to drive the first locking member 310Y to move. Specifically, in the present embodiment, the first driving member 340Y and the first traction member 350Y are both movably disposed in the inner cavity of the handlebar frame 100Y, and the first driving member 340Y is fixedly connected to the first locking member 310Y by passing through the handlebar frame 100Y through the first connecting member 360Y (such as a shaft or a pin). Since the support tube 110Y and the push tube 120Y are hollow tubular structures, the "inner cavity of the handlebar 100Y" may refer to the tubular inner cavity of the support tube 110Y and/or the push tube 120Y. The first driving member 340Y and the first traction member 350Y are disposed in the inner cavity of the handle 100Y, so that not only is the space utilization improved, but also the handle 100Y can be more neat and beautiful in appearance.

In one embodiment, as shown in fig. 21 and 22, a fixed support 130Y is provided in the inner cavity of the handlebar frame 100Y. Specifically, the fixed support 130Y is disposed in the support tube 110Y and is used to support the first driving member 340Y. In an embodiment, the reversing locking mechanism 300Y further includes a first restoring member 370Y, which may be, for example, a spring or a resilient restoring member such as a shrapnel. The first reset element 370Y is abutted between the first driving element 340Y and the fixed supporting seat 130Y, and is used for driving the first driving element 340Y to reset, so that the first driving element 340Y constantly has a tendency to drive the first locking element 310Y to be in the first locking position. In this way, when the pulling force acting on the first pulling member 350Y is no longer present, the first driving member 340Y can automatically reset and drive the first locking member 310Y to move to the first locking position under the reset force of the first reset member 370Y.

In one embodiment, when the handlebar 100Y is pivoted about the first pivot point A1, the handlebar 100Y also has a third use position relative to the wheel frame 200Y. Specifically, as shown in fig. 16 and 18, when the handle frame 100Y is in the first use position, the handle frame 100Y is away from the wheel frame 200Y about the first pivot point A1 to put the stroller frame 1000Y in the deployed state. As shown in fig. 23 and 24, when the handle 100Y is in the third use position, the handle 100Y is adjacent to the wheel frame 200Y about the first pivot point A1 to bring the cart frame 1000Y into the collapsed state.

Referring to fig. 16, 19, 20 and 25, in an embodiment, the wheel frame 200Y further includes a handrail member 240Y, a second transmission member 250Y and a third transmission member 260Y. Wherein, the top of the front wheel frame 210Y and the top of the rear wheel frame 220Y are both pivoted to the armrest piece 240Y and form the second pivot point A2 on the armrest piece 240Y, the first end of the second transmission piece 250Y is pivoted to the front wheel frame 210Y and forms the fourth pivot point A4, the second end of the second transmission piece 250Y extends to the rear wheel frame 220Y and is pivoted to the first end of the third transmission piece 260Y and forms the fifth pivot point A5, and the second end of the third transmission piece 260Y is pivoted to the armrest piece 240Y and forms the sixth pivot point A6. The second transmission member 250Y may be used to support the seat assembly, and when a child sits on the seat assembly, the arms thereof may be put on the armrest member 240Y, so that not only the riding comfort may be improved, but also the armrest member 240Y may have a space for restricting the riding space of the child and preventing the child from falling off the seat assembly.

Specifically, referring to fig. 19, 20 and 25, in the present embodiment, the third transmission member 260Y and the handlebar 100Y are disposed in parallel along the left-right direction and are located at the left and right sides of the first transmission member 230Y, respectively, and the first end of the third transmission member 260Y is fixedly connected to the handlebar 100Y through a fixing member (not shown) passing through the first transmission member 230Y. In the present embodiment, the connection point of the third transmission member 260Y and the handlebar 100Y is disposed coaxially with the first pivot point A1, and furthermore, the pivot point between the second transmission member 250Y and the third transmission member 260Y (i.e., the fifth pivot point A5) is disposed coaxially with the first pivot point A1.

Referring to fig. 16, 17, 19 and 20, in the present embodiment, when the handlebar 100Y is fixed relative to the first transmission member 230Y, the third transmission member 260Y and the first transmission member 230Y are also kept relatively fixed, i.e. the third transmission member 260Y is not rotatable about the first pivot point A1, so that the handlebar 240Y, the rear wheel frame 220Y, the first transmission member 230Y and the third transmission member 260Y are kept relatively fixed. At the same time, the third transmission member 260Y and the second transmission member 250Y are also kept relatively fixed, and the second transmission member 250Y can be stably supported between the front wheel frame 210Y and the rear wheel frame 220Y, and thus, the stroller frame 1000Y can be stably maintained in the unfolded state. When the handlebar 100Y rotates around the first pivot point A1 relative to the first transmission member 230Y, the handlebar 100Y can rotate around the fifth pivot point A5 and the sixth pivot point A6 simultaneously by driving the third transmission member 260Y through the fixing member. In this process, the handlebar 100Y may further push the first transmission member 230Y to pivot about the third pivot point A3, and simultaneously, the third transmission member 260Y may further drive the armrest member 240Y to rotate about the second pivot point A2, and simultaneously push the second transmission member 250Y to pivot about the fourth pivot point A4, so that the front wheel frame 210Y and the rear wheel frame 220Y rotate relative to the second pivot point A2, thereby finally achieving folding of the stroller frame 1000Y. In particular, the folding process of the cart frame 1000Y is described below.

In order to prevent the handle 100Y from being rotated at will with respect to the wheel frame 200Y to be folded, in other words, in order to enable the handle 100Y to be stably held in the first use position or the third use position. In one embodiment, the handle 100Y and the wheel frame 200Y can be restrained or allowed to rotate relative to the wheel frame 200Y by the folding lock mechanism 400Y for folding operations. Specifically, in the present embodiment, in order to improve the stability of the folding locking mechanism 400Y during locking, two folding locking mechanisms 400Y are provided on the cart frame 1000Y and are respectively located on the left and right sides of the cart frame 1000Y.

Referring to fig. 19 and 20, in one embodiment, the folding locking mechanism 400Y is disposed between the handlebar 100Y and the wheel frame 200Y, and the folding locking mechanism 400Y includes a second locking member 410Y that is movable relative to the handlebar 100Y and has a second locking position and a second unlocking position. Specifically, the second locking member 410Y is movably disposed on the third transmission member 260Y. Of course, in other embodiments, the second locking member 410Y may also be movably disposed on the handlebar 100Y, which is not particularly limited herein. Specifically, when the second locking member 410Y moves to the second locking position, the second locking member 410Y engages with the first transmission member 230Y (see fig. 19), so that the third transmission member 260Y is restricted from pivoting relative to the first transmission member 230Y, and the handle 100Y is restricted from pivoting relative to the first transmission member 230Y, and finally the handle 100Y is restricted from being switched between the first use position and the third use position. When the second locking member 410Y moves to the second unlocking position, the second locking member 410Y disengages from the first transmission member 230Y (see fig. 20), which allows the third transmission member 260Y to pivot relative to the first transmission member 230Y, and also allows the vehicle handle 100Y to pivot relative to the first transmission member 230Y, ultimately allowing the vehicle handle 100Y to switch between the first use position and the third use position.

In one embodiment, the first transmission member 230Y has a first recess (not shown) and a second recess (not shown). Specifically, the first recess and the second recess are both located at an end of the first transmission member 230Y near the first pivot point A1, and are disposed substantially opposite to each other in the circumferential direction of the first pivot point A1. When the stroller frame 1000Y is in the unfolded state, the second locking member 410Y engages with the first recess (see fig. 19) to maintain the stroller frame 1000Y in the unfolded state. When the cart frame 1000Y is in the collapsed state, the second locking member 410Y is engaged with the second recess (see fig. 26), so that the cart frame 1000Y is kept in the collapsed state, and accidental deployment of the cart frame 1000Y during transportation or storage is avoided.

Referring to fig. 19, 20, 27 and 28, in an embodiment, the folding locking mechanism 400Y further includes a second driving component 420Y and a second traction member 430Y. The second driving assembly 420Y is movably disposed on the handlebar 100Y and is in driving engagement with the second locking member 410Y, and the second traction member 430Y is connected to the second driving assembly 420Y. In this way, the second driving component 420Y can be driven to move by the second traction member 430Y, so as to drive the second locking member 410Y to move. Specifically, the second driving assembly 420Y includes a second sliding sleeve 421Y and a second driving member 422Y. The second sliding sleeve 421Y is sleeved outside the support tube 110Y of the handlebar 100Y and can slide along the length direction of the support tube 110Y, and the second sliding sleeve 421Y can be abutted or connected with the second locking member 410Y. The second driving member 422Y is movably disposed on the fixed support 130Y in the inner cavity of the handlebar frame 100Y, and is connected to the second sliding sleeve 421Y through the handlebar frame 100Y by a second connecting member 450Y (such as a shaft or a pin). The second traction member 430Y is movably disposed in the inner cavity of the handlebar 100Y and is connected to the second driving member 422Y. When the second traction member 430Y moves, the second driving member 422Y can be driven to move the second sliding sleeve 421Y, so as to drive the second locking member 410Y to move from the second locking position to the second unlocking position.

Referring to fig. 19, 20, and 27 and 28, in an embodiment, the folding locking mechanism 400Y further includes a second reset element 440Y and a fifth reset element (not shown), where the second reset element 440Y and the fifth reset element may be elastic reset elements such as a spring or a shrapnel. As shown in fig. 27 and 28, the second reset element 440Y abuts between the second driving element 422Y and the fixed supporting seat 130Y, so as to drive the second driving element 422Y to reset. The fifth restoring member provides the second locking member 410Y with an elastic restoring force biased toward the second locking position. Specifically, in the present embodiment, the second sliding sleeve 421Y drives the second locking member 410Y to move from the second locking position to the second unlocking position by pushing. Therefore, when the second driving member 422Y resets to drive the second sliding sleeve 421Y to reset, the second sliding sleeve 421Y is separated from the second locking member 410Y, and the second locking member 410Y can automatically move from the second locking position to the second locking position under the elastic restoring force of the fifth resetting member. Thus, when the pulling force acting on the second pulling member 430Y is no longer present, the second driving member 422Y can be automatically reset under the reset force of the second reset member 440Y and drives the second sliding sleeve 421Y to reset so as to disengage from the second locking member 410Y, and the second locking member 410Y can be automatically moved to the second locking position under the reset force of the fifth reset member.

The folding process of the cart frame 1000Y will be briefly described with reference to the drawings.

Referring to fig. 16, 17, 19 and 20, in this embodiment, when the stroller frame 1000Y is in the unfolded state, the second locking member 410Y is in the second locking position and extends into the first recess of the third transmission member 260Y to limit the rotation of the third transmission member 260Y and the stroller frame 100Y relative to the first transmission member 230Y about the first pivot point A1 and to limit the rotation of the third transmission member 260Y relative to the first transmission member 230Y, so that the first transmission member 230Y can form a fixed four-bar structure with the third transmission member 260Y, the armrest member 240Y and the rear wheel frame 220Y, and the second transmission member 250Y can also be stably supported between the front wheel frame 210Y and the rear wheel frame 220Y to maintain the stroller frame 1000Y in the unfolded state. Specifically, the lever between the sixth pivot point A6, the second pivot point A2, the third pivot point A3, and the first pivot point A1 (or the fifth pivot point A5) forms a four-bar structure, and two links that are adjacent and connected are relatively fixed.

When the cart frame 1000Y needs to be switched from the unfolded state to the folded state, the second locking member 410Y is driven to move to the second unlocking position, so that the second locking member 410Y is retracted from the first recess of the third transmission member 260Y. Thus, the vehicle handle 100Y and the third transmission member 260Y are both rotatable in a counterclockwise direction about the first pivot point A1 relative to the first transmission member 230Y. When the handlebar 100Y and the third transmission member 260Y are rotatable relative to the first transmission member 230Y, a movable four-bar linkage structure is formed among the armrest member 240Y, the rear wheel frame 220Y, the first transmission member 230Y and the third transmission member 260Y (or the handlebar 100Y), and two adjacent and connected links are pivotable relative to each other. In this way, the folding of the handlebar frame 100Y relative to the wheel frame 200Y and the folding of the wheel frame 200Y itself (i.e., the relative folding of the front wheel frame 210Y, the rear wheel frame 220Y, the armrest 240Y, and the like) can be achieved by the movable four-bar linkage structure.

Specifically, referring to fig. 19 and 20, during the folding process, when the handle frame 100Y and the third transmission member 260Y can both rotate around the first pivot point A1 in the counterclockwise direction relative to the first transmission member 230Y, the handle frame 100Y drives the second end of the first transmission member 230Y to rotate around the third pivot point A3 in the clockwise direction, and the third transmission member 260Y simultaneously rotates around the sixth pivot point A6 in the counterclockwise direction to drive the armrest member 240Y to rotate around the second pivot point A2 in the clockwise direction to approach the rear wheel frame 220Y for folding. In addition, when the third transmission member 260Y rotates around the first pivot point A1 (or the fifth pivot point A5), the third transmission member 260Y also drives the first end of the second transmission member 250Y to rotate around the fourth pivot point A4 in a clockwise direction to pull the front wheel frame 210Y gradually closer to the rear wheel frame 220Y for folding. In this embodiment, as shown in fig. 23, 26 and 27, when the stroller frame 100Y is in the folded state, the second recess on the second transmission member 250Y is opposite to the second locking member 410Y. When the second driving member 422Y is capable of resetting the second sliding sleeve 421Y and separating from the second locking member 410Y under the action of the second resetting member 440Y, the second locking member 410Y can move to the second locking position to extend into the second recess for locking under the elastic resetting force of the fifth resetting member, so as to limit the stroller frame 1000Y from being unfolded.

In order to improve convenience for a user to unlock the reversing lock mechanism 300Y and the folding lock mechanism 400Y, in some embodiments provided by the present invention, the unlocking mechanism 500Y can perform unlocking operations for the reversing lock mechanism 300Y and the folding lock mechanism 400Y, respectively. Specifically, the lock release mechanism 500Y can be drivingly connected to the reversing lock mechanism 300Y and the folding lock mechanism 400Y, respectively, to allow the handle frame 100Y to rotate relative to the wheel frame 200Y for reversing operation or folding operation. Specifically, as shown in fig. 16 and 17, a lock release mechanism 500Y is provided on the vehicle handle 100Y. More specifically, the push tube 120Y provided on the handle holder 100Y is provided, so that the user's operation is facilitated. Of course, in other embodiments, the lock release mechanism 500Y may be provided on the support bar or the wheel frame 200Y, which is not particularly limited herein.

Referring to fig. 16, 21 and 28, in one embodiment, the lock release mechanism 500Y includes a first lock release member 510Y, a second lock release member 520Y and an operation member 530Y. The first lock release 510Y is rotatably disposed on the handlebar 100Y and is in driving connection with the reversing locking mechanism 300Y to allow the handlebar 100Y to rotate relative to the wheel frame 200Y for reversing. Specifically, the first release lock 510Y is in driving connection with the first driver 340Y in the reverse lock mechanism 300Y. The second release lock 520Y is drivingly connected to a second drive 422Y in the stow lock mechanism 400Y to allow the vehicle handle 100Y to rotate relative to the wheel frame 200Y for stowing. Specifically, the second lock release 520Y is rotatably provided on the vehicle handle 100Y and is in driving connection with the folding lock mechanism 400Y. The operating member 530Y is movably disposed on the handle 100Y and selectively drives the first lock release member 510Y or the second lock release member 520Y to rotate. It should be noted that, in other embodiments, the first locking member 510Y may be in driving connection with the folding locking mechanism 400Y, and the second locking member 520Y may be in driving connection with the reversing locking mechanism 300Y, which is not limited herein.

Since the first release lock 510Y is rotatably provided on the handle 100Y and is in driving connection with the first driving member 340Y, the second release lock 520Y is rotatably provided on the handle 100Y and is in driving connection with the second driving member 422Y, and the operating member 530Y is movable and is used to drive either one of the first release lock 510Y and the second release lock 520Y to rotate. Therefore, the user can control the first locking member 510Y to rotate by driving the operation member 530Y, thereby indirectly controlling the first driving member 340Y and the first locking member 310Y in the locking mechanism 400Y. When the first locking member 310Y is in the first locking position, the locking portion 311Y of the first locking member 310Y is engaged with the locking portion 301Y of the first engaging member 320Y or the second engaging member 330Y, and the handle 100Y can be held in the first use position or the second use position. When the first locking member 310Y is at the first unlocking position, the locking portion 311Y of the first locking member 310Y is disengaged from the locking portion 301Y of the first engaging member 320Y or the second engaging member 330Y to unlock the vehicle handle 100Y, and the vehicle handle 100Y can be freely switched between the first use position and the second use position. Meanwhile, the user can control the second lock release member 520Y to rotate by driving the operation member 530Y, thereby indirectly controlling the second driving assembly 420Y and the second lock member 410Y in the locking mechanism 400Y. When the second locking member 410Y is in the second locking position, the stroller frame 1000Y is restricted to switch between the deployed state and the collapsed state, i.e., the stroller frame 1000Y can be maintained in the deployed state or the collapsed state. When the second lock 410Y is in the second lock release position, the stroller frame 1000Y can be allowed to switch between the deployed state and the collapsed state. Just because the user only needs to operate the lock release mechanism 500Y to control different locking mechanisms respectively, the operation convenience of the user is improved.

Referring to fig. 21 and 28 to 32, in an embodiment, the first lock release member 510Y and the second lock release member 520Y may each have a disc shape, and both may be rotatably mounted on the push tube 120Y of the handlebar frame 100Y by a shaft or a pin. Specifically, the push tube 120Y has a mounting seat 140Y therein, and the first lock release member 510Y and the second lock release member 520Y are rotatably mounted on the mounting seat 140Y. The first locking member 510Y is provided with a first connecting portion 511Y, and the first connecting portion 511Y and the rotation center of the first locking member 510Y are offset, for example, may be disposed in a straight line or non-straight line, but not limited thereto. The first connection portion 511Y is used to connect the commutation locking mechanism 300Y. Specifically, the first connection portion 511Y is connected to the first driving member 340Y through the first traction member 350Y. When the operation member 530Y drives the first lock release member 510Y to rotate about the rotation center thereof, the first connection portion 511Y rotates synchronously about the rotation center of the first lock release member 510Y, so as to drive the first traction member 350Y to move to pull the first driving member 340Y to move, and finally drive the first locking member 310Y to move from the first locking position to the first lock release position. Similarly, the second lock release member 520Y is provided with a second connecting portion 521Y, and the rotation centers of the second connecting portion 521Y and the second lock release member 520Y are offset, for example, may be disposed in a straight line or non-straight line, but not limited thereto. The second connecting portion 521Y is configured to be coupled to the engagement locking mechanism 400Y. Specifically, the second connection 521Y is connected to the second driving assembly 420Y (specifically, the second driving member 422Y) through the second traction member 430Y. Therefore, when the operating member 530Y drives the second lock release member 520Y to rotate about the rotation center thereof, the second connecting portion 521Y rotates synchronously about the rotation center of the second lock release member 520Y, so as to drive the second traction member 430Y to move to pull the second driving assembly 420Y to move, and finally push or drive the second lock member 410Y to move from the second locking position to the second lock release position.

Specifically, in the present embodiment, as shown in fig. 21 and 28, the first traction member 350Y and the second traction member 430Y may be, for example, both traction ropes. More specifically, the first releasing member 510Y is provided with two first connection portions 511Y, and the second releasing member 520Y is provided with two second connection portions 521Y. The two first connection portions 511Y are connected to the two first traction members 350Y, respectively, and the two second connection portions 521Y are connected to the two second traction members 430Y, respectively. Thus, when the first lock release 510Y rotates, the two reverse lock mechanisms 300Y can be simultaneously controlled to release the lock. When the second lock release member 520Y rotates, the two folding locking mechanisms 400Y can be controlled to release the lock at the same time.

With continued reference to fig. 21 and 28-32, in one embodiment, the lock release mechanism 500Y further includes a security lock 540Y. The safety lock 540Y is movably disposed on the handlebar 100Y and is switchable between a first position and a second position. When the safety lock 540Y is in the first position (see fig. 22), the operating member 530Y is drivingly connected to the first release member 510Y through the safety lock 540Y. When the safety lock 540Y is in the second position (see fig. 28), the operating member 530Y is drivingly connected to the second lock release member 520Y through the safety lock 540Y. Specifically, when the user needs to unlock the reverse locking mechanism 300Y to change the use direction of the vehicle handle 100Y, the safety lock 540Y can be moved to the first position, and thus the first lock release 510Y can be rotated by operating the operating member 530Y. When the user needs to unlock the folding locking mechanism 400Y to switch the cart frame 1000Y between the unfolded state and the folded state, the safety lock 540Y can be moved to the second position, so that the second unlocking member 520Y can be rotated by operating the operating member 530Y.

With continued reference to fig. 21 and 28-32, in one embodiment, the safety lock 540Y includes a first linkage 541Y, a second linkage 542Y, and a toggle 543Y. The first linkage 541Y is in driving connection with the first lock release 510Y, the second linkage 542Y is in driving connection with the second lock release 520Y, the toggle 543Y is respectively connected with the first linkage 541Y and the second linkage 542Y, and the toggle 543Y is movably disposed on the handlebar 100Y and is switchable between a first position and a second position to drive the first linkage 541Y and the second linkage 542Y to move along the first direction F1. Specifically, when the moving member 543Y is located at the first position, the operating member 530Y is operated to push the first linkage member 541Y to move along the second direction F2 so as to rotate the first lock releasing member 510Y, and when the moving member 543Y is located at the second position, the operating member 530Y is operated to push the second linkage member 542Y to move along the second direction F2 so as to rotate the second lock releasing member 520Y, wherein the first direction F1 intersects the second direction F2.

Referring again to fig. 21, 28-32, in an embodiment, the first linkage 541Y has a first abutment 5411Y, and the second linkage 542Y has a second abutment 5421Y. The operation piece 530Y has a first driving portion 531Y and a second driving portion 532Y provided at intervals. When the toggle 543Y is located at the first position, the first abutting portion 5411Y is located at the first driving portion 531Y, and the second abutting portion 5421Y is offset from the second driving portion 532Y. In this way, when the operating member 530Y moves upward along the second direction F2, the first driving portion 531Y can abut against the first abutting portion 5411Y, so as to push the first linkage member 541Y to move along the second direction F2, and further drive the first releasing member 510Y to rotate, so as to finally release the lock of the reversing locking mechanism 300Y. Meanwhile, since the second abutting portion 5421Y is offset from the second driving portion 532Y, when the operating member 530Y moves upward along the second direction F2, the second driving portion 532Y does not contact the second abutting portion 5421Y, so that both the second linking member 542Y and the second releasing member 520Y can remain stationary, i.e. the operating member 530Y is operated, which does not affect the folding locking mechanism 400Y. Similarly, when the striking element 543Y is located at the second position, the pair of second abutting portions 5421Y is located at the second driving portion 532Y, and the first abutting portion 5411Y is offset from the first driving portion 531Y. In this way, when the operating member 530Y moves upward along the second direction F2, the second driving portion 532Y can abut against the second abutting portion 5421Y, so as to push the second linking member 542Y to move along the second direction F2, and further drive the second releasing member 520Y to rotate, so as to finally release the lock of the folding locking mechanism 400Y. Meanwhile, since the first abutting portion 5411Y is offset from the first driving portion 531Y, when the operating member 530Y moves upward along the second direction F2, the first driving portion 531Y does not contact the first abutting portion 5411Y, so that both the first linkage member 541Y and the first release member 510Y can remain stationary, i.e. the operating member 530Y is operated, which does not affect the folding locking mechanism 400Y.

Referring to fig. 29 to 32, in an embodiment, the operation member 530Y further has a third driving portion 533Y and a fourth driving portion 534Y. The third driving portion 533Y is disposed apart from the fourth driving portion 534Y and is located between the first driving portion 531Y and the second driving portion 532Y. The first linkage 541Y and the second linkage 542Y are spaced apart from each other, and form a third avoiding portion 544Y therebetween. Specifically, the first linkage 541Y further has a third abutment 5412Y, and the second linkage 542Y further has a fourth abutment 5422Y. When the toggle 543Y is located at the first position, the pair of third abutting portions 5412Y is located at the third driving portion 533Y, the pair of first abutting portions 5411Y is located at the first driving portion 531Y, and the pair of fourth driving portions 534Y is located at the third avoiding portion 544Y. Therefore, when the operation piece 530Y moves upward in the second direction F2, the first driving portion 531Y can abut against the first abutting portion 5411Y, and the third abutting portion 5412Y can abut against the third driving portion 533Y, thereby simultaneously pushing the first linkage 541Y to move in the second direction F2. Meanwhile, in the process that the operating member 530Y moves upwards along the second direction F2, the fourth driving portion 534Y is gradually inserted into the third avoiding portion 544Y, so that the situation that the second linking member 542Y is driven to move when the stirring member 543Y is located at the first position is avoided. Similarly, when the catch 543Y is located at the second position, the pair of fourth abutting portions 5422Y is located at the fourth driving portion 534Y, the pair of second abutting portions 5421Y is located at the second driving portion 532Y, and the pair of third driving portions 533Y is located at the third avoiding portion 544Y. Therefore, when the operation member 530Y moves upward in the second direction F2, the second driving portion 532Y can abut against the second abutting portion 5421Y, and the fourth abutting portion 5422Y can abut against the fourth driving portion 534Y, thereby simultaneously pushing the second linkage member 542Y to move in the second direction F2. Meanwhile, in the process that the operating member 530Y moves upwards along the second direction F2, the third driving portion 533Y is gradually inserted into the third avoiding portion 544Y, so that the situation that the first linkage member 541Y is driven to move when the stirring member 543Y is located at the second position is avoided.

In an embodiment, a first relief portion is formed between the first abutment 5411Y and the third abutment 5412Y. A second relief portion is formed between the second abutting portion 5421Y and the fourth abutting portion 5422Y. Specifically, when the toggle member 543Y is located at the first position and the operating member 530Y is operated, the second avoidance portion is configured to avoid the second driving portion 532Y. When the toggle member 543Y is located at the second position and the operating member 530Y is operated, the first avoidance portion is configured to avoid the first driving portion 531Y.

Referring to fig. 21, 28 and 29, in an embodiment, the lock release mechanism 500Y further includes a third reset member 550Y, which may be an elastic member such as a spring, a shrapnel, or the like. The third restoring member 550Y is abutted between the handlebar 100Y (e.g. the handlebar 120Y) and the poking member 543Y, and is configured to provide an elastic restoring force to the poking member 543Y, so as to keep the poking member 543Y at the first position or the second position. For example, in the present embodiment, the third reset element 550Y is configured to constantly maintain the toggle element 543Y in the first position. If the reverse locking mechanism 300Y needs to be released, the operating member 530Y may be directly operated (e.g., pressed or pushed upward). If the locking mechanism 400Y is to be released, the moving member 543Y is moved to the second position, and then the operating member 530Y is operated. After the locking mechanism 400Y is released, the toggle piece 543Y is released, and under the reset action of the third reset piece 550Y, the toggle piece 543Y is automatically reset to the first position.

In one embodiment, one of the first linkage 541Y and the first lock release 510Y has a first guiding recess (not shown), and the other has a first mating protrusion (not shown). The first fitting protrusion is slidably disposed in the first guiding recess, and the first guiding recess extends along the first direction F1. Likewise, one of the second interlocking member 542Y and the second unlocking member 520Y has a second guiding recess (not shown in the figure), and the other has a second fitting projection (not shown in the figure). The second fitting protrusion is slidably disposed in the second guiding recess, and the second guiding recess extends along the first direction F1. Thus, when the toggle member 543Y is switched between the first position and the second position along the first direction F1, it can drive the first linkage member 541Y and the second linkage member 542Y to move left and right along the first direction F1 at the same time to keep the first lock release member 510Y and the second lock release member 520Y stationary, meanwhile, when the first linkage member 541Y moves up and down along the second direction F2, the first linkage member 541Y can drive the first lock release member 510Y to rotate, and when the second linkage member 542Y moves up and down along the second direction F2, the second linkage member 542Y can drive the second lock release member 520Y to rotate.

Referring to fig. 21, 22, 28 and 32, in an embodiment, the operating member 530Y has an initial position (see fig. 21 and 32) and an unlock position (see fig. 22 and 28) when moving in the second direction F2. When the operating member 530Y is located at the initial position, the operating member 530Y can be operated to move to push the first linkage 541Y or the second linkage 542Y. In other words, when the operation member 530Y is in the initial position, a gap or just contact may be left between the first driving portion 531Y and the first abutting portion 5411Y and between the third driving portion 533Y and the third abutting portion 5412Y (or between the second driving portion 532Y and the second abutting portion 5421Y and between the fourth driving portion 534Y and the fourth abutting portion 5422Y) on the operation member 530Y, and thus, the first linkage 541Y (or the second linkage 542Y) may be pushed upward by pushing or pressing the operation member 530Y upward. When the operating member 530Y is in the unlock position, the operating member 530Y pushes against the first linkage 541Y or the second linkage 542Y.

Specifically, as shown in fig. 21, 22, 28 and 32, when the toggle piece 543Y is at the first position and the operating piece 530Y is at the initial position, gaps or just contacts may be left between the first driving portion 531Y and the first abutting portion 5411Y and between the third driving portion 533Y and the third abutting portion 5412Y. At this time, the operating member 530Y may be pushed or pressed upward to move to the unlocking position, and in this process, the first linkage member 541Y is pushed against the operating member, so that the first linkage member 541Y drives the first lock release member 510Y to rotate. When the toggle member 543Y is at the second position and the operating member 530Y is at the initial position, gaps or just contact may be left between the second driving portion 532Y and the second abutment portion 5421Y and between the fourth driving portion 534Y and the fourth abutment portion 5422Y. At this time, the operating member 530Y may be pushed or pressed upward to move to the unlocking position, and in the process, the second linking member 542Y is pushed against, so that the second linking member 542Y drives the second unlocking member 520Y to rotate.

Referring to fig. 21 and 29, in an embodiment, the lock release mechanism 500Y further includes a fourth reset member 560Y, which may be an elastic member such as a spring, a shrapnel, or the like. The fourth restoring member 560Y abuts between the mounting base 140Y of the handlebar 100Y and the operating member 530Y for providing an elastic restoring force to the operating member 530Y to keep the operating member 530Y in the initial position.

Referring to fig. 21 and 31, in an embodiment, the lock release mechanism 500Y further includes a first fixed cover 571Y and a second fixed cover 572Y. The first fixing cover 571Y is disposed on the top of the pushing tube 120Y, the second fixing cover 572Y is disposed on the bottom of the pushing tube 120Y, and the second fixing cover 572Y is provided with a hole through which the operation member 530Y passes. The first fixing cover 571Y is coupled to the second fixing cover 572Y and fixed to the push tube 120Y. Thus, the operating element 530Y and other parts can be restricted, and the operating element 530Y and other parts can be prevented from being separated from the pusher tube 120Y. In addition, the first fixing cover 571Y and the second fixing cover 572Y are covered outside the first lock release 510Y, the second lock release 520Y, and the safety lock 540Y, so that the lock release mechanism 500Y and the cart frame 1000Y can be simplified and beautified. Specifically, as shown in fig. 21, the first fixing cover 571Y is provided with an operation hole 5711Y, the striking member 543Y is provided with a pushing portion 5431Y, and the pushing portion 5431Y can pass through the operation hole 5711Y for the user to hold, and the user can change the position of the striking member 543Y by pushing the pushing portion 5431Y.

The cart frame 1000Y and the lock release mechanism 500Y thereof have the following technical effects:

The cart frame 1000Y includes a lock release mechanism 500Y. In the above-described release lock mechanism 500Y, since the first release lock 510Y is rotatably provided on the cart frame 1000Y and is in driving connection with the reverse lock mechanism 300Y, the second release lock 520Y is rotatably provided on the cart frame 1000Y and is in driving connection with the folding lock mechanism 400Y, and the operation member 530Y is movable and is used to drive either one of the first release lock 510Y and the second release lock 520Y to rotate, wherein the reverse lock mechanism 300Y is capable of allowing the cart frame 100Y to rotate relative to the wheel frame 200Y to reverse, and the folding lock mechanism 400Y is capable of allowing the cart frame 100Y to rotate relative to the wheel frame 200Y to fold. Therefore, the user can control the first lock release 510Y to rotate by driving the movement of the operation member 530Y, and thus indirectly control the reversing locking mechanism 300Y, so that the handlebar 100Y of the cart frame 1000Y can be reversed. Meanwhile, the user can control the second lock release member 520Y to rotate by driving the operation member 530Y, and further indirectly control the folding locking mechanism 400Y, so that the cart frame 1000Y can be switched between the unfolded state and the folded state. Just because the user only needs to operate the lock release mechanism 500Y to control different locking mechanisms respectively, the operation convenience of the user is improved.

Fig. 33 shows a cart frame 1000Z provided according to the first embodiment of the present invention, and the cart frame 1000Z has a substantially right-left symmetrical overall structure, which can be used as a frame of a child cart, a pet cart, a cargo cart, or the like. For example, in the present embodiment, the stroller frame 1000Z is used as a frame of a stroller to explain the structure and the operation principle thereof.

Referring to fig. 33, in an embodiment, a cart frame 1000Z may include a cart frame 100Z, a wheel frame 200Z, a wheel base 230Z, and a lock release mechanism 300Z according to an embodiment of the invention. Since the cart frame 1000Z has a symmetrical structure, the cart frame 1000Z will be described in detail below mainly by taking one side as an example, and the cart hand frame 100Z, the wheel frame 200Z, the wheel base 230Z, and the lock release mechanism 300Z will be described together.

Referring to fig. 33 to 36, in an embodiment, the wheel frame 200Z and the handlebar frame 100Z are pivotally connected to each other so that the entire cart frame 1000Z has a collapsed state (in other embodiments, the collapsed state may also be referred to as a collapsed state or a folded state) (see fig. 35) and an expanded state (see fig. 33). Specifically, the handle 100Z includes an upper handle 110Z and a lower handle 120Z that are relatively movable, and the end of the lower handle 120Z remote from the upper handle 110Z is pivotally connected to the wheel frame 200Z. The wheel frame 200Z includes a front wheel frame 210Z and a rear wheel frame 220Z pivotally connected, wherein the lower handle frame 120Z, the front wheel frame 210Z, and the rear wheel frame 220Z may be pivotally connected by a first pivot mount 400Z. When the stroller frame 1000Z is switched from the unfolded state to the folded state, the front wheel frame 210Z pivots about the first pivot 400Z to approach the rear wheel frame 220Z, and the lower wheel frame 120Z pivots about the first pivot 400Z to approach the rear wheel frame 220Z. When the stroller frame 1000Z is switched from the collapsed state to the expanded state, the front wheel frame 210Z pivots about the first pivot 400Z away from the rear wheel frame 220Z, and the lower wheel frame 120Z pivots about the first pivot 400Z away from the rear wheel frame 220Z. Specifically, when the stroller frame 1000Z is in the unfolded state, a first angle α1 is formed between the front wheel frame 210Z and the rear wheel frame 220Z, and a second angle α2 is formed between the lower handle frame 120Z and the rear wheel frame 220Z. When the cart frame 1000Z is in the collapsed state, a third angle α3 is formed between the front wheel frame 210Z and the rear wheel frame 220Z, and a fourth angle α4 is formed between the lower handle frame 120Z and the rear wheel frame 220Z. Wherein α1> α3, α2> α4 (see fig. 34 and 35). Of course, in other embodiments, the lower handle 120Z may be directly pivotally connected to the front wheel frame 210Z or the rear wheel frame 220Z. The specific structure of the wheel frame 200Z (including the front wheel frame 210Z and the rear wheel frame 220Z) and the handle frame 100Z (including the upper handle frame 110Z and the lower handle frame 120Z) will be further described below.

Referring to fig. 33, in an embodiment, the front wheel frame 210Z has a U-shaped structure, for example, and includes front bars 211Z on the left and right sides and a front rail 212Z connected between the two front bars 211Z. The front rail 212Z extends substantially along a first direction F1, which corresponds to the left-right direction F1. The front rail 212Z may also be used as a foot pedal when the stroller frame 1000Z is used as a frame for a stroller.

In one embodiment, at least one wheel base 230Z (which may be referred to herein as a front wheel base 230 ZA) is mounted to the bottom of the front wheel frame 210Z. Specifically, in the present embodiment, as shown in fig. 33, two front wheel holders 230ZA are mounted to the bottom of the front wheel frame 210Z, and the two front wheel holders 230ZA are disposed at intervals in the left-right direction (i.e., the first direction F1). More specifically, two front wheel carriers 230ZA are fixedly mounted on the left and right ends of the front rail 212Z, each front wheel carrier 230ZA being adapted to mount a wheel 240Z (which may be referred to herein as a front wheel 240 ZA), respectively. Of course, in another alternative embodiment, the front wheel frame 210Z may have other embodiments, for example, the front wheel frame 210Z includes only two front bars 211Z, one ends of the two front bars 211Z are connected to form a V-shaped structure, and a front wheel seat 230ZA may be centrally installed at the bottom of the front wheel frame 210Z. Alternatively, for example, the front wheel frame 210Z includes only two front rod pieces 211Z disposed substantially parallel to each other in the left-right direction, and the two front wheel bases 230ZA are connected to the two front rod pieces 211Z, respectively.

Unless specifically stated and limited otherwise, the terms of orientation such as "left", "right" and the like with respect to the cart frame 1000Z in the various embodiments of the present invention are based on the "left", "right" orientation of the cart frame 1000Z in normal running, and are schematically shown by arrows L, R in the figures. These directional terms are used only to make the description of the embodiments of the present invention clearer and are not used to unduly limit the scope of the present invention.

With continued reference to fig. 33, in an embodiment, the rear wheel frame 220Z may also have a U-shaped structure, which includes two rear bars 221Z located on the left and right sides and a rear cross bar 222Z connected between the two rear bars 221Z, and the rear cross bar 222Z extends along the first direction F1. The bottom of rear wheel frame 220Z also mounts at least one wheel mount 230Z (which may be referred to herein as rear wheel mount 230 BZ). In the present embodiment, two rear wheel seats 230BZ are mounted to the bottom of the rear wheel frame 220Z, and the two rear wheel seats 230BZ are disposed at intervals in the left-right direction (i.e., the first direction F1). More specifically, two rear wheel seats 230BZ are respectively connected to the same-side rear rod piece 221Z, and each rear wheel seat 230BZ is respectively used for mounting a wheel 240Z (which may be referred to herein as a rear wheel 240 BZ). Specifically, the rear wheel base 230BZ is connected to the rear wheel 240BZ, and the rear wheel base 230BZ is rotatably connected to the rear wheel frame 220Z (specifically, the ipsilateral rear lever 221Z) via a connecting shaft. Of course, in another alternative embodiment, the rear wheel frame 220Z may have other embodiments, for example, the rear wheel frame 220Z includes only two rear bars 221Z, one ends of the two rear bars 221Z are connected to have a V-shaped structure, and the bottom of the rear wheel frame 220Z may be centrally mounted with one rear wheel seat 230BZ. Further, for example, the rear wheel frame 220Z includes only two rear bars 221Z disposed in parallel in the left-right direction, and the two rear wheel seats 230BZ are connected to the two rear bars 221Z, respectively.

Referring to fig. 33 and 34, in one embodiment, the cart frame 1000Z further includes a wheel locking mechanism 500Z, the wheel locking mechanism 500Z being disposed between the wheel carriage 200Z and the wheel carriage 230Z, the wheel locking mechanism 500Z being configured to limit or permit rotation of the wheel carriage 230Z relative to the wheel carriage 200Z. Specifically, in the present embodiment, as shown in fig. 34, a wheel locking mechanism 500Z is provided between the rear wheel frame 220Z and the rear wheel base 230BZ, and serves to restrict or allow the rear wheel base 230BZ to rotate relative to the rear wheel frame 220Z. When the rear wheel carrier 230BZ is fixed with respect to the rear wheel carrier 220Z, the rear wheel 240BZ is fixed with respect to the rear wheel carrier 220Z, the steering of the cart frame 1000Z is locked, and the cart frame 1000Z can advance or retreat in a straight line. When the rear wheel carrier 230BZ is rotatable with respect to the rear wheel carrier 220Z, the rear wheel 240BZ is rotatable with respect to the rear wheel carrier 220Z, so that the stroller frame 1000Z can perform a steering drift operation, which improves the flexibility of movement of the stroller frame 1000Z.

Referring to fig. 34, in one embodiment, a wheel locking mechanism 500Z includes a first locking member 510Z and a first locking recess 520Z. Wherein the wheel base 230Z, in particular the rear wheel base 230BZ, is provided with a first locking recess 520Z, i.e. the first locking recess 520Z is provided in the wheel base 230Z, and the first locking member 510Z is movably provided on the wheel frame 200Z, in particular the rear wheel frame 220Z, and adapted to be in locking engagement with the first locking recess 520Z. Specifically, when the first locking member 510Z extends into the first locking recess 520Z to be in locking engagement with the first locking recess 520Z, the wheel base 230Z (specifically, the rear wheel base 230 BZ) is restrained from rotating relative to the wheel frame 200Z (specifically, the rear wheel frame 220Z), thereby restraining the stroller frame 1000Z from drifting and turning. When the first locking member 510Z is retracted from the first locking recess 520Z to disengage the locking engagement with the first locking recess 520Z, the wheel base 230Z (specifically, the rear wheel base 230 BZ) is allowed to rotate relative to the wheel frame 200Z (specifically, the rear wheel frame 220Z), thereby allowing the stroller frame 1000Z to drift and steer.

With continued reference to fig. 34, in an embodiment, the wheel locking mechanism 500Z further includes a second reset member 530Z, where the second reset member 530Z abuts between the rear wheel frame 220Z and the first locking member 510Z, and is configured to provide an elastic restoring force to the first locking member 510Z, so that the first locking member 510Z constantly has a tendency to extend into the first locking recess 520Z. The second restoring member 530Z may be an elastic member such as a spring or a leaf spring.

In this embodiment, in order to further improve the steering flexibility of the cart frame 1000Z, the cart frame 1000Z is provided with two wheel locking mechanisms 500Z, and one of the wheel locking mechanisms 500Z is provided between the rear rod 221Z and the rear wheel base 230BZ on the same side.

Referring to fig. 33 and 34, in an embodiment, the upper cart hand frame 110Z may be movable relative to the lower cart hand frame 120Z, for example, the upper cart hand frame 110Z may be slidably sleeved with the lower cart hand frame 120Z, so that the overall height of the cart hand frame 100Z relative to the ground when the cart frame 1000Z is in the unfolded state may be adjusted, so as to facilitate the user holding with different heights, and improve the applicability of the cart frame 1000Z. In one embodiment, the upper handlebar 110Z is, for example, in a U-shaped configuration, and includes two first support tubes 111Z and a push tube 112Z connected between the two first support tubes 111Z. The first support tubes 111Z are straight tubes, and the push tube 112Z is in a U-shaped structure and is connected between the two first support tubes 111Z for being held by a user to push the cart frame 1000Z. More specifically, the lower hand rack 120Z includes, for example, two second support tubes 121Z, and upper ends of the two second support tubes 121Z are slidably sleeved with lower ends of the first support tubes 111Z on the same side, respectively, and lower ends of the two second support tubes 121Z are pivotally connected with the first pivot seat 400Z on the same side, respectively. It should be noted that the two second support tubes 121Z are respectively slidably sleeved with the first support tube 111Z on the same side, which includes two embodiments in which the second support tube 121Z is sleeved outside the first support tube 111Z, or in which the first support tube 111Z is sleeved outside the second support tube 121Z. Specifically, in the present embodiment, the principle of cooperation of the second support tube 121Z and the first support tube 111Z is specifically described by taking the case that the second support tube 121Z is sleeved outside the first support tube 111Z. Note that, the "height of the entire handlebar 100Z relative to the ground" may be regarded as a height of the push tube 112Z from the ground in the substantially vertical direction.

In order to stably maintain the upper handle bar 100Z at a desired height, i.e., to prevent the upper handle bar 110Z from sliding randomly relative to the lower handle bar 120Z, in one embodiment, as shown in fig. 34, the upper handle bar 100Z further includes a height adjustment locking mechanism 130Z, the height adjustment locking mechanism 130Z being disposed between the upper handle bar 110Z and the lower handle bar 120Z, and the upper handle bar 110Z and the lower handle bar 120Z being restrained or allowed to move relative to each other by the height adjustment locking mechanism 130Z. Specifically, the height adjustment lock mechanism 130Z has a locked state and a released state. When the height adjustment locking mechanism 130Z is in the locked state, the upper handle bar 110Z is fixed relative to the lower handle bar 120Z, and the upper handle bar and the lower handle bar are not slidable relative to each other. When the height adjustment lock mechanism 130Z is in the unlocked state, the upper handle bar 110Z can slide relative to the lower handle bar 120Z.

Referring to fig. 34, in an embodiment, the height adjustment locking mechanism 130Z includes a second locking component 131Z and a second locking portion 133Z. The second locking portion 133Z is disposed on the lower hand frame 120Z, and the second locking assembly 131Z is movably disposed on the upper hand frame 110Z and adapted to be locked with the second locking portion 133Z. Specifically, when the second locking assembly 131Z is extended into the second mating lock portion 133Z to be locked in engagement, the upper handle 110Z is restricted from sliding with respect to the lower handle 120Z. When the second locking assembly 131Z is disengaged from the second mating lock portion 133Z to be disengaged, the upper handle 110Z is allowed to slide relative to the lower handle 120Z.

In this embodiment, the second locking assembly 131Z includes a second locking piece 1311Z. Specifically, the second locking member 1311Z is provided in the upper handle 110Z and is movable relative to the upper handle 110Z and the lower handle 120Z to have a locking position and a unlocking position. More specifically, the height adjustment locking mechanism 130Z further includes a first mating lock portion 131, and the first mating lock portion 132Z is provided to the upper handle 110Z. When the second locking piece 1311Z is in the locked position, the second locking piece 1311Z is in locking engagement with the first locking portion 132Z and the second locking portion 133Z to restrict the upper handle frame 110Z from sliding relative to the lower handle frame 120Z, at which time the height adjustment locking mechanism 130Z is in a locked state, so that the height of the handle frame 100Z as a whole is fixed relative to the ground. When the second locking member 1311Z is in the unlocking position, the second locking member 1311Z releases the locking of the first locking portion 132Z and the second locking portion 133Z to allow the upper handlebar 110Z to slide relative to the lower handlebar 120Z, and at this time, the height-adjusting locking mechanism 130Z is in the unlocking state, so that the overall height of the handlebar 100Z can be adjusted to accommodate users with different heights to hold the handlebar 100Z. In the present embodiment, the first locking portion 132Z is a slot structure disposed on the first support tube 111Z in the upper handlebar 110Z, the second locking portion 133Z is a slot structure disposed on the second support tube 121Z in the lower handlebar 120Z, and when the second locking member 1311Z is at the locking position, the second locking member 1311Z passes through the first locking portion 132Z and the second locking portion 133Z to be in locking engagement with both. When the second locking piece 1311Z is in the unlocking position, the second locking piece 1311Z is retracted from the second lock fitting portion 133Z to unlock the second lock fitting portion 133Z.

In one embodiment, the second locking portions 133Z are provided in plurality (e.g., two, three or more), and the plurality of second locking portions 133Z are disposed at intervals along the sliding direction of the upper handle 110Z relative to the lower handle 120Z. Specifically, the plurality of second locking portions 133Z may be regarded as being disposed at intervals along the length direction of the second support tube 121Z. When the second locking piece 1311Z passes through the first locking portion 132Z and is respectively in plug-in engagement with the different second locking portions 133Z, the overall length of the handlebar 100Z is correspondingly different, and correspondingly, the height of the handlebar 100Z relative to the ground is different, so as to adapt to the holding of users with different heights. Specifically, referring to fig. 34 and 44, in the present embodiment, three second locking portions 133Z are provided, and the three second locking portions 133Z may be referred to as a bottom second locking portion 1331Z, a middle second locking portion 1332Z, and a top second locking portion 1333Z, respectively. Wherein, the middle second locking portion 1332Z is located between the bottom second locking portion 1331Z and the top second locking portion 1333Z, and the bottom second locking portion 1331Z is closer to the bottom end along the second support tube 121Z than the top second locking portion 1333Z. When the second locking piece 1311Z is inserted through the first locking portion 132Z and the bottom second locking portion 1331Z, the length of the handlebar 100Z is L1, the height of the push handle tube 112Z from the ground is H1, when the second locking piece 1311Z is inserted through the first locking portion 132Z and the middle second locking portion 1332Z, the length of the handlebar 100Z is L2, the height of the push handle tube 112Z from the ground is H2, and when the second locking piece 1311Z is inserted through the first locking portion 132Z and the top second locking portion 1333Z, the length of the handlebar 100Z is L3, the height of the push handle tube 112Z from the ground is H3, wherein L1< L2< L3, and H1< H2< H3.

With continued reference to fig. 34, in one embodiment, the second locking assembly 131Z further includes a driver 1312Z, the driver 1312Z being movable relative to the upper handle 110Z and operatively connected to a second locking member 1311Z. Specifically, the driver 1312Z has a locked position and an unlocked position on its path of movement. When the driver 1312Z is in the locked position, the driver 1312Z drives the second lock 1311Z in the locked position. When the driver 1312Z is in the unlocked position, the driver 1312Z drives the second lock 1311Z in the unlocked position. Thus, the user can indirectly control the position of the second locking member 1311Z by directly controlling the position of the driving member 1312Z, thereby controlling the state of the height adjustment locking mechanism 130Z. In the present embodiment, the moving direction of the driving member 1312Z is substantially the same as the length direction of the first support tube 111Z.

Referring again to fig. 34, in one embodiment, the height adjustment locking mechanism 130Z further includes a support 136Z and a guide (not shown). Specifically, the support base 136Z is disposed on the upper handlebar 110Z and has a first guiding portion 1361Z, an extending direction of the first guiding portion 1361Z is perpendicular to a moving direction of the driving member 1312Z, the second locking member 1311Z is movably disposed on the support base 136Z, and the guiding member passes through the second locking member 1311Z and extends into the first guiding portion 1361Z. More specifically, the driving member 1312Z is provided with a second guide portion (not shown) extending obliquely with respect to the moving direction of the driving member 1312Z, and the guide member can be inserted into and slidably engaged with the second guide portion. When the driver 1312Z is switched between the locked and unlocked positions, the second lock 1311Z is enabled to switch between the locked and unlocked positions by the engagement of the guides with the first and second guides 1361Z. In the present embodiment, the guide may be, for example, a pin or the like. Of course, in other embodiments, the second locking member 1311Z and the guiding member may be integrally formed, and the guiding member may be regarded as a component of the second locking member 1311Z, for example, the guiding member may be a boss integrally formed on the second locking member 1311Z, which is mainly used to pass through the first guiding portion 1361Z and the second guiding portion to guide the second locking member 1311Z to switch between the locking position and the unlocking position. In this embodiment, the first guide portion 1361Z and the second guide portion are both through hole structures.

In an embodiment, the height adjustment locking mechanism 130Z further includes a third restoring member 135Z (see fig. 34), and the third restoring member 135Z may be, for example, an elastic member such as a spring, a shrapnel, or the like. Specifically, the third restoring member 135Z is a compression spring, which abuts between the supporting seat 136Z and the driving member 1312Z, and is configured to provide an elastic restoring force to the driving member 1312Z, so that the driving member 1312Z can be maintained in the locking position, and thus, the second locking member 1311Z can be maintained in the locking position.

In the present embodiment, in order to improve stability when the upper handle frame 110Z is fixed relative to the lower handle frame 120Z, the handle frame 100Z includes two height adjustment locking mechanisms 130Z. Specifically, one of the height adjustment lock mechanisms 130Z described above is provided between the first support tube 111Z and the second support tube 121Z on the same side.

Referring to fig. 33 to 36, in an embodiment, the upper handle frame 110Z slides relative to the lower handle frame 120Z such that the handle frame 100Z has an extended state (see fig. 33) and a collapsed state (in other embodiments, the collapsed state may also be referred to as a collapsed state or a folded state, etc.) (see fig. 35). Specifically, the length of the handle 100Z in the extended state is longer than the length of the handle 100Z in the collapsed state. In the process of switching the folding state of the cart frame 1000Z, the cart hand frame 100Z can be first in the folding state, so that the volume of the cart frame 1000Z in the folding state can be further reduced. In the present embodiment, when the second locking member 1311Z passes through the first locking portion 132Z and is locked with the bottom second locking portion 1331Z, the stroller can be considered to be in an extended state, and the length of the stroller 100Z is the shortest and L1. When the second locking piece 1311Z is retracted from the second locking portion 133Z to release the locking of the second locking portion 133Z, the upper handle 110Z can slide relative to the lower handle 120Z to allow the handle 100Z to switch to the folded state. When the handle 100Z is in the folded state, the length of the handle 100Z is L0, and L0< L1.

Referring to fig. 34 and 36, in an embodiment, the cart frame 1000Z further includes a handle fold lock mechanism 600Z, and the handle fold lock mechanism 600Z is disposed on the handle frame 100Z and adapted to lock the handle frame 100Z in a folded state. Specifically, the handle folding locking mechanism 600Z includes an engaging member 610Z and a second locking recess 620Z, one of the upper handle 110Z and the lower handle 120Z is provided with the second locking recess 620Z, and the other is provided with the movable engaging member 610Z. In other words, the second locking recess 620Z is provided on one of the upper and lower hand frames 110Z and 120Z, and the engaging member 610Z is movably provided on the other of the two. Thus, the engaging member 610Z can be engaged with or disengaged from the second locking recess 620Z to limit or allow the handlebar 100Z to switch between the folded state and the extended state. Specifically, when the engaging member 610Z engages with the second locking recess 620Z, the stroller frame 100Z is locked in the folded state, so that the stroller frame 1000Z can be prevented from accidentally sliding relative to the lower stroller frame 120Z during the transferring or storing process, thereby preventing the overall volume of the stroller frame 1000Z from increasing, which makes it inconvenient to transfer or store. When the engaging piece 610Z is disengaged from the second locking recess 620Z, the vehicle handle 100Z is allowed to switch to the extended state.

With continued reference to fig. 34 and 36, in the present embodiment, the support base 136Z is provided with a second locking recess 620Z. The lower handle 120Z is provided with a through hole (not shown), and the engaging member 610Z movably penetrates through the through hole so that the engaging member 610Z can be engaged with the second locking recess 620Z. Specifically, the folding locking mechanism 600Z further includes a fixing base 630Z and a first reset member 640, where the fixing base 630Z is disposed on the lower hand frame 120Z, and the first reset member 640 is disposed between the fixing base 630Z and the engaging member 610Z and is used for providing an elastic restoring force for the engaging member 610Z, so that the engaging member 610Z constantly has a tendency to extend into the second locking recess 620Z for engaging. The first restoring member 640 may be an elastic member such as a spring or a leaf spring. Specifically, in the present embodiment, the first restoring member 640 is a compression spring, and two ends thereof abut between the engaging member 610Z and the fixing base 630Z.

Referring to fig. 34 and 36, in one embodiment, the support base 136Z is provided with a first push ramp 1363Z and a second push ramp 1364Z. When the handlebar 100Z is switched from the extended state to the folded state, the first pushing inclined surface 1363Z pushes the engaging member 610Z to guide the engaging member 610Z to be inserted into the second locking recess 620Z for engagement. The second pushing inclined plane 1364Z is formed on a side wall of the second locking recess 620Z, and when the handlebar 100Z is switched from the folded state to the extended state, the second pushing inclined plane 1364Z pushes the engaging member 610Z to guide the engaging member 610Z to retract from the second locking recess 620Z.

The following briefly describes the height adjustment process of the handle 100Z and the switching process of the handle 100Z between the extended state and the collapsed state with reference to fig. 34 and 36.

Referring to fig. 34, in the present embodiment, when the handlebar 100Z is in an extended state and the height of the handlebar 100Z relative to the ground needs to be adjusted, the user can first drive the second locking member 1311Z to retract from the second locking portion 133Z through the driving member 1312Z, so that the upper handlebar 110Z can slide freely relative to the lower handlebar 120Z for height adjustment. After the height of the upper handle frame 100Z is adjusted in place, the third reset element 135Z drives the driving element 1312Z to reset to the locking position, so as to drive the second locking element 1311Z to pass through the first locking portion 132Z again and extend into the second locking portion 133Z, and thus the upper handle frame 110Z is restricted from sliding relative to the lower handle frame 120Z, so that the upper handle frame 100Z is kept at the desired height.

Referring to fig. 34 and 36, when the user needs to switch the handle 100Z from the extended state to the folded state (from fig. 34 to fig. 36), the user can drive the second locking member 1311Z to retract from the second locking portion 133Z through the driving member 1312Z, and then the user can push the upper handle 110Z to move the upper handle 110Z toward the direction close to the bottom of the lower handle 120Z (i.e. the bottom of the second support tube 121Z), so that the overall length of the handle 100Z can be reduced to switch to the folded state. During the movement, the first pushing inclined plane 1363Z of the supporting seat 136Z abuts against the engaging member 610Z, and the engaging member 610Z is pushed to gradually retract away from the through hole along with the movement of the upper handlebar 110Z, such that the first restoring member 640 is compressed. When the engaging member 610Z passes over the first pushing inclined plane 1363Z and is aligned with the second locking recess 620Z, the first reset member 640 resets and pushes the engaging member 610Z through the through hole to extend into the second locking recess 620Z, so that the engaging member 610Z can engage with the second locking recess 620Z to limit the upper vehicle frame 110Z from sliding relative to the lower vehicle frame 120Z.

With continued reference to fig. 34 and 36, when the user needs to switch the handlebar 100Z from the folded state to the extended state (from fig. 36 to fig. 34), the user can directly pull the upper handlebar 110Z to move the upper handlebar 110Z away from the bottom of the lower handlebar 120Z, so that the overall length of the handlebar 100Z is extended to switch to the extended state. During the pulling force applied to the upper handlebar 110Z, the second pushing inclined surface 1364Z pushes the engaging member 610Z, so that the engaging member 610Z gradually retreats from the second locking recess 620Z, and during this process, the first reset member 640 is gradually compressed. When the engaging member 610Z is disengaged from the second locking recess 620Z, the upper handle 110Z may be allowed to slide with respect to the lower handle 120Z to switch to the extended state.

Referring to fig. 34 and 36, in an embodiment, an abutment 140Z is disposed in the lower handlebar 120Z, and the abutment 140Z is located near the bottom end of the second support tube 121Z and is used to abut against the support seat 136Z to limit the sliding travel of the upper handlebar 110Z. When the handlebar 100Z is in the folded state, the supporting seat 136Z abuts against the abutment 140Z.

In order to improve convenience of unlocking the wheel locking mechanism 500Z and the height adjustment locking mechanism 130Z by a user, the unlocking mechanism 300Z according to an embodiment of the present invention is capable of performing unlocking operations for the wheel locking mechanism 500Z and the height adjustment locking mechanism 130Z, respectively. Specifically, the lock release mechanism 300Z can be drivingly connected to the wheel lock mechanism 500Z and the height adjustment lock mechanism 130Z, respectively, to allow the wheel base 230Z to rotate relative to the wheel frame 200Z to provide the stroller frame 1000Z with a drift steering function, while also allowing the upper stroller frame 110Z to move relative to the lower stroller frame 120Z to change the height of the stroller frame 100Z relative to the ground. Specifically, as shown in fig. 33, a lock release mechanism 300Z is provided on the vehicle handle 100Z. More specifically, the push tube 112Z is provided on the upper handle 110Z, thus facilitating the user's operation. Of course, in other embodiments, the lock release mechanism 300Z may be disposed on the first support tube 111Z, the lower handle 120Z, or the wheel frame 200Z, which is not particularly limited herein.

Referring to fig. 34 and 37, in an embodiment, the lock release mechanism 300Z includes a first lock release member 310Z, a second lock release member 320Z, and an operation member 330Z. Wherein the first release lock 310Z is rotatably disposed on the handlebar 100Z and is in driving connection with the wheel locking mechanism 500Z to allow the wheel base 230Z to rotate relative to the wheel carriage 200Z for drift steering. Specifically, the first lock release 310Z is in driving connection with the first lock 510Z in the wheel locking mechanism 500Z. The second release lock 320Z is rotatably disposed on the rider carriage 100Z and is drivingly connected to the height adjustment locking mechanism 130Z to allow movement of the upper carriage 110Z relative to the lower carriage 120Z. Specifically, the second lock release 320Z is in driving connection with a driver 1312Z in the height adjustment locking mechanism 130Z. The operating member 330Z is movably disposed on the handle 100Z and selectively drives the first release member 310Z or the second release member 320Z to rotate. It should be noted that, in other embodiments, the first locking member 310Z may be in driving connection with the height adjustment locking mechanism 130Z, and the second locking member 320Z may be in driving connection with the wheel locking mechanism 500Z, which is not particularly limited herein.

Since the first release latch 310Z is rotatably disposed on the handle 100Z and is in driving connection with the first lock latch 510Z, the second release latch 320Z is rotatably disposed on the handle 100Z and is in driving connection with the driving member 1312Z, and the operating member 330Z is movable and is used to drive rotation of either one of the first release latch 310Z and the second release latch 320Z. Thus, the user can control the rotation of the first locking member 310Z by driving the movement of the operating member 330Z, thereby indirectly controlling the first locking member 510Z in the wheel locking mechanism 500Z. When the first locking member 510Z is extended into the first locking recess 520Z to be locked in engagement, the wheel base 230Z is restricted from rotating relative to the wheel frame 200Z, and the cart frame 1000Z can travel in a straight line. When the first locking piece 510Z is withdrawn from the first locking recess 520Z to be disengaged, the wheel base 230Z is allowed to rotate relative to the wheel frame 200Z, and the stroller frame 1000Z can be drift-steered. Meanwhile, the user can also control the second lock release member 320Z to rotate by driving the operation member 330Z, thereby indirectly controlling the second locking assembly 131Z (i.e., the driving member 1312Z and the second locking member 1311Z) in the height adjustment locking mechanism 130Z. Specifically, when the driving member 1312Z is in the locking position, the second locking member 1311Z is correspondingly in the locking position, and the second locking member 1311Z is in locking engagement with the first and second mating lock portions 132Z and 133Z such that the upper handle 110Z is restrained from movement relative to the lower handle 120Z. When the driving member 1312Z is in the unlocked position, the second locking member 1311Z is correspondingly in the unlocked position, and the second locking member 1311Z is unlocked from the first locking portion 132Z and the second locking portion 133Z, such that the upper handle 110Z is movable relative to the lower handle 120Z. Just because the user only needs to operate the lock release mechanism 300Z to control different locking mechanisms respectively, the operation convenience of the user is improved.

Referring to fig. 37 to 40, in an embodiment, the first lock release member 310Z and the second lock release member 320Z may each have a disc shape, and both may be rotatably mounted on the push tube 112Z of the handle frame 100Z by a shaft or a pin. Specifically, a mounting seat 340Z is provided in the push tube 112Z, and the first lock release member 310Z and the second lock release member 320Z are rotatably mounted on the mounting seat 340Z.

Referring to fig. 34 and 37, in an embodiment, the first lock release member 310Z is provided with a first connection portion 311Z, and the rotation centers of the first connection portion 311Z and the first lock release member 310Z are offset, for example, may be disposed in a straight line or may be disposed in a non-straight line, but not limited thereto. The first connecting portion 311Z is for connecting the wheel locking mechanism 500Z. In this embodiment, the wheel locking mechanism 500Z further includes a first traction member 540Z, and the first traction member 540Z is disposed in the wheel frame 200Z and the handlebar 100Z and passes through the first pivot 400Z and the height adjustment locking mechanism 130Z to be connected between the first release locking member 310Z and the first locking member 510Z. Specifically, one end of the first traction member 540Z is connected to the first release locking member 310Z (specifically, the first connecting portion 311Z), and the other end of the first traction member 540Z (i.e., the end far away from the first release locking member 310Z) sequentially passes through the height adjustment locking mechanism 130Z and the first pivot 400Z and then is connected to the first locking member 510Z disposed in the rear wheel frame 220Z, so that the first release locking member 310Z can drive the first locking member 510Z to retract from the first locking recess 520Z through the first traction member 540Z. Specifically, referring to fig. 34, 37 and 41, when the operating member 330Z drives the first releasing member 310Z to rotate around its rotation center, the first connecting portion 311Z rotates synchronously around the rotation center of the first releasing member 310Z, and further drives the first pulling member 540Z to move to pull the first locking member 510Z to move to retract from the first locking recess 520Z.

As shown in fig. 34 and 37, similarly, the second lock release member 320Z is provided with a second connection portion 321Z, and the rotation centers of the second connection portion 321Z and the second lock release member 320Z are offset, for example, may be disposed in a straight line or may be disposed in a non-straight line, but not limited thereto. The second connecting portion 321Z is used to connect the height adjustment locking mechanism 130Z. Specifically, in the present embodiment, the height adjustment locking mechanism 130Z further includes a second traction member 137Z, and the second traction member 137Z is disposed within the upper handle 110Z and connected between the second release locking member 320Z and the second locking assembly 131Z (specifically, the driving member 1312Z). Specifically, referring to fig. 34, 37 and 42, when the operating member 330Z drives the second lock release member 320Z to rotate around the rotation center thereof, the second connecting portion 321Z rotates synchronously around the rotation center of the second lock release member 320Z, so as to drive the second traction member 137Z to move to pull the driving member 1312Z to move, and finally drive the second locking member 1311Z to move from the locking position to the unlocking position.

Specifically, in the present embodiment, as shown in fig. 34 and 37, the first traction member 540Z and the second traction member 137Z may be, for example, both traction ropes. More specifically, the first releasing member 310Z is provided with two first connecting portions 311Z, and the second releasing member 320Z is provided with two second connecting portions 321Z. The two first connecting portions 311Z are connected to the two first traction members 540Z, respectively, and the two second connecting portions 321Z are connected to the two second traction members 137Z, respectively. Thus, when the first lock release member 310Z rotates, both wheel locking mechanisms 500Z can be simultaneously controlled to release the lock. When the second locking piece 320Z rotates, the two height adjustment locking mechanisms 130Z can be controlled to be locked simultaneously.

Referring to fig. 34, 36 and 37, in the present embodiment, a first through channel 1365Z and a second through channel 1366Z are provided on the supporting seat 136Z. Wherein, the first penetrating channel 1365Z is used for accommodating the first traction member 540Z, and the second penetrating channel 1366Z is used for accommodating the second traction member 137Z, so that the first traction member 540Z can be prevented from being entangled with other components when penetrating the height adjustment locking mechanism 130Z. Specifically, the first through-channel 1365Z is a substantially U-shaped channel, and the other end of the first traction member 540Z (i.e., the end far from the first release member 310Z) extends from one end of the U-shaped channel into the support base 136Z, then extends from the other end of the U-shaped channel and extends around the support base 136Z into the first pivot base 400Z. The first traction member 540Z is wound around the support base 136Z, so that the problem that the first traction member 540Z knots in the height adjustment locking mechanism 130Z after the height of the handlebar 100Z is lowered can be prevented. Specifically, the second through-hole 1366Z may be a substantially linear channel, and when one end of the second pulling member 137Z rotates with the second locking member 320Z, the other end of the second pulling member 137Z can be quickly operated to drive the driving member 1312Z to move through the linear channel.

Referring to fig. 37-40, in one embodiment, lock release mechanism 300Z further includes a security lock 350Z. The safety lock 350Z is movably disposed on the handlebar 100Z and is switchable between a first position and a second position. When the safety lock 350Z is in the first position (see fig. 41), the operating member 330Z is drivingly connected to the first release member 310Z via the safety lock 350Z. When the safety lock 350Z is in the second position (see fig. 42), the operating member 330Z is drivingly connected to the second release member 320Z via the safety lock 350Z. Specifically, as shown in fig. 34 and 41, when the user needs to unlock the wheel locking mechanism 500Z to provide the stroller frame 1000Z with a drift steering function, the safety lock 350Z can be moved to the first position, so that the first lock release member 310Z can be rotated by operating the operating member 330Z. As shown in fig. 34 and 42, when the user needs to release the lock height adjustment locking mechanism 130Z to adjust the height of the handle 100Z or switch the handle 100Z to the folded state, the safety lock 350Z can be moved to the second position, so that the second lock release member 320Z can be rotated by operating the operating member 330Z.

With continued reference to fig. 37-40, in one embodiment, the safety lock 350Z includes a first linkage 351Z, a second linkage 352Z, and a toggle 353Z. The first linkage member 351Z is in driving connection with the first releasing member 310Z, the second linkage member 352Z is in driving connection with the second releasing member 320Z, the poking member 353Z is respectively connected with the first linkage member 351Z and the second linkage member 352Z, and the poking member 353Z is movably arranged on the handlebar 100Z and can be switched between a first position and a second position so as to drive the first linkage member 351Z and the second linkage member 352Z to move along the first direction F1. Specifically, when the toggling member 353Z is located at the first position, the operating member 330Z is operated to push the first linking member 351Z to move along the second direction F2 so as to rotate the first releasing member 310Z, and when the toggling member 353Z is located at the second position, the operating member 330Z is operated to push the second linking member 352Z to move along the second direction F2 so as to rotate the second releasing member 320Z, wherein the first direction F1 intersects the second direction F2.

Referring to fig. 34 and 41-43, in an embodiment, the first linkage 351Z has a first abutting portion 3511Z, and the second linkage 352Z has a second abutting portion 3521Z. The operating element 330Z has a first driving portion 331Z and a second driving portion 332Z provided at intervals. When the toggle 353Z is located at the first position, the first abutment portion 3511Z is located at the first driving portion 331Z, and the second abutment portion 3521Z is offset from the second driving portion 332Z. In this way, when the operating member 330Z moves upward along the second direction F2, the first driving portion 331Z can abut against the first abutting portion 3511Z, so as to push the first linking member 351Z to move along the second direction F2, and further drive the first releasing member 310Z to rotate, thereby finally releasing the lock of the wheel locking mechanism 500Z. Meanwhile, since the second abutting portion 3521Z is offset from the second driving portion 332Z, when the operating member 330Z moves upward along the second direction F2, the second driving portion 332Z does not contact the second abutting portion 3521Z, so that both the second linking member 352Z and the second releasing member 320Z can remain stationary, i.e. the operating member 330Z is operated, which does not affect the height adjustment locking mechanism 130Z. Similarly, when the toggle 353Z is positioned at the second position, the pair of second abutment portions 3521Z is positioned at the second driving portion 332Z, and the first abutment portion 3511Z is offset from the first driving portion 331Z. In this way, when the operating member 330Z moves upward along the second direction F2, the second driving portion 332Z can abut against the second abutting portion 3521Z, so as to push the second linking member 352Z to move along the second direction F2, and further drive the second releasing member 320Z to rotate, thereby finally releasing the height adjustment locking mechanism 130Z. Meanwhile, since the first abutting portion 3511Z is offset from the first driving portion 331Z, when the operating member 330Z moves upward along the second direction F2, the first driving portion 331Z does not contact the first abutting portion 3511Z, so that both the first linking member 351Z and the first unlocking member 310Z can remain stationary, i.e. the operating member 330Z is operated, which does not affect the wheel locking mechanism 500Z.

Referring to fig. 43, in an embodiment, the operation member 330Z further has a third driving portion 333Z and a fourth driving portion 334Z. The third driving part 333Z is disposed at a distance from the fourth driving part 334Z and is located between the first driving part 331Z and the second driving part 332Z. The first linkage 351Z and the second linkage 352Z are spaced apart from each other with a third relief portion 354Z formed therebetween. Specifically, the first linkage 351Z further has a third abutment 3512Z, and the second linkage 352Z further has a fourth abutment 3522Z. When the toggle 353Z is located at the first position, the pair of third contact portions 3512Z is located at the third driving portion 333Z, the pair of first contact portions 3511Z is located at the first driving portion 331Z, and the pair of fourth driving portions 334Z is located at the third avoiding portion 354Z. Therefore, when the operation member 330Z moves upward in the second direction F2, the first driving portion 331Z can abut against the first abutting portion 3511Z, and the third abutting portion 3512Z can abut against the third driving portion 333Z, thereby simultaneously pushing the first linkage 351Z to move in the second direction F2. Meanwhile, in the process that the operating member 330Z moves upwards along the second direction F2, the fourth driving portion 334Z is gradually inserted into the third avoiding portion 354Z, so that the situation that the second linkage member 352Z is driven to move when the stirring member 353Z is located at the first position is avoided. Similarly, when the toggle 353Z is in the second position, the pair of fourth contact portions 3522Z is positioned in the fourth driving portion 334Z, the pair of second contact portions 3521Z is positioned in the second driving portion 332Z, and the pair of third driving portions 333Z is positioned in the third avoiding portion 354Z. Therefore, when the operating member 330Z moves upward in the second direction F2, the second driving portion 332Z can abut against the second abutting portion 3521Z, and the fourth abutting portion 3522Z can abut against the fourth driving portion 334Z, thereby simultaneously pushing the second linkage member 352Z to move in the second direction F2. Meanwhile, in the process that the operating member 330Z moves upwards along the second direction F2, the third driving portion 333Z is gradually inserted into the third avoiding portion 354Z, so that the situation that the first linkage member 351Z is driven to move when the stirring member 353Z is located at the second position is avoided.

In one embodiment, as shown in fig. 43, a first avoiding portion is formed between the first abutting portion 3511Z and the third abutting portion 3512Z. A second relief portion is formed between the second abutment portion 3521Z and the fourth abutment portion 3522Z. Specifically, when the toggle member 353Z is located at the first position and the operating member 330Z is operated, the second avoidance portion is configured to avoid the second driving portion 332Z. When the toggle member 353Z is located at the second position and the operating member 330Z is operated, the first avoidance portion is configured to avoid the first driving portion 331Z.

Referring to fig. 34, 37 and 38, in an embodiment, the lock release mechanism 300Z further includes a fourth restoring member 360Z, which may be an elastic member such as a spring or a shrapnel. The fourth restoring member 360Z abuts between the handle 100Z (e.g., the push tube 112Z) and the striking member 353Z, for providing an elastic restoring force to the striking member 353Z to maintain the striking member 353Z in the first position or the second position. For example, in the present embodiment, the fourth reset element 360Z is used to constantly maintain the toggle element 353Z in the first position. If the wheel locking mechanism 500Z needs to be unlocked, the operating member 330Z may be directly operated (e.g., pressed or pushed upward). If the locking mechanism 130Z is to be released, the toggle member 353Z is moved to the second position, and then the operating member 330Z is operated. After the locking of the height adjustment locking mechanism 130Z is completed, the toggle member 353Z is released, and under the reset action of the fourth reset member 360Z, the toggle member 353Z automatically resets to the second position.

In one embodiment, one of the first linkage 351Z and the first release 310Z has a first guiding recess (not shown), and the other has a first mating protrusion (not shown). The first fitting protrusion is slidably disposed in the first guiding recess, and the first guiding recess extends along the first direction F1. Likewise, one of the second interlock element 352Z and the second lock release element 320Z has a second guiding recess (not shown) and the other has a second mating protrusion (not shown). The second fitting protrusion is slidably disposed in the second guiding recess, and the second guiding recess extends along the first direction F1. Thus, when the toggle member 353Z is switched between the first position and the second position along the first direction F1, it can drive the first linkage member 351Z and the second linkage member 352Z to move left and right along the first direction F1 at the same time to keep the first release member 310Z and the second release member 320Z stationary, meanwhile, when the first linkage member 351Z moves up and down along the second direction F2, the first linkage member 351Z can drive the first release member 310Z to rotate, and when the second linkage member 352Z moves up and down along the second direction F2, the second linkage member 352Z can drive the second release member 320Z to rotate.

In one embodiment, the operating member 330Z has an initial position (see fig. 37) and an unlocked position (see fig. 41 and 42) when moving in the second direction F2. When the operating member 330Z is at the initial position, the operating member 330Z can be operated to move to push the first linkage member 351Z or the second linkage member 352Z. In other words, when the operation element 330Z is at the initial position, a gap or just contact may be left between the first driving portion 331Z and the first abutting portion 3511Z and between the third driving portion 333Z and the third abutting portion 3512Z (or between the second driving portion 332Z and the second abutting portion 3521Z and between the fourth driving portion 334Z and the fourth abutting portion 3522Z) on the operation element 330Z, so that the first linkage 351Z (or the second linkage 352Z) may be pushed upward by pushing or pressing the operation element 330Z upward. When the operating member 330Z is in the unlocked position, the operating member 330Z pushes against the first linkage 351Z or the second linkage 352Z.

Specifically, as shown in fig. 37, 41 to 43, when the toggle member 353Z is in the first position and the operating member 330Z is in the initial position, a gap or just contact may be left between the first driving portion 331Z and the first abutment portion 3511Z and between the third driving portion 333Z and the third abutment portion 3512Z. At this time, the operating member 330Z may be pushed or pressed upward to move to the unlocking position, and in this process, the first linkage member 351Z is pushed against, so that the first linkage member 351Z drives the first lock release member 310Z to rotate. When the toggle member 353Z is in the second position and the operating member 330Z is in the initial position, gaps or just contact may be left between the second driving portion 332Z and the second abutment portion 3521Z and between the fourth driving portion 334Z and the fourth abutment portion 3522Z. At this time, the operating member 330Z may be pushed or pressed upward to move to the unlocking position, and in this process, the second linking member 352Z is pushed against, so that the second linking member 352Z drives the second lock release member 320Z to rotate.

In an embodiment, as shown in fig. 37 and 39, the lock release mechanism 300Z further includes a fifth reset element 370Z, which may be an elastic element such as a spring, a shrapnel, or the like. The fifth restoring member 370Z abuts between the mounting seat 340Z of the handlebar 100Z and the operating member 330Z for providing an elastic restoring force to the operating member 330Z to keep the operating member 330Z at the initial position.

Referring to fig. 33 and 40-42, in an embodiment, the lock release mechanism 300Z further includes a first fixed cover 381Z and a second fixed cover 382Z. The first fixed cover 381Z and the second fixed cover 382Z are arranged on the upper side and the lower side of the push tube 112Z, wherein the first fixed cover 381Z is positioned at the top of the push tube 112Z, the second fixed cover 381Z is positioned at the bottom of the push tube 112Z, and a through hole for the operation piece 330Z to pass through is arranged on the second fixed cover 382Z. The first fixed cover 381Z is in connection engagement with the second fixed cover 382Z and is fixed with the push tube 112Z. In this way, the operating element 330Z and other parts can be limited, and the operating element 330Z and other parts can be prevented from being separated from the pusher tube 112Z. In addition, the first fixing cover 381Z and the second fixing cover 382Z are covered outside the first lock release member 310Z, the second lock release member 320Z and the safety lock 350Z, so that the lock release mechanism 300Z and the cart frame 1000Z can be simplified and beautified. Specifically, as shown in fig. 41 and 42, the first fixing cover 381Z is provided with an operation hole 3811Z, and the toggle member 353Z is provided with a pushing portion 3531Z, and the pushing portion 3531Z may pass through the operation hole 3811Z to be held by a user, and the user may change the position of the toggle member 353Z by pushing the pushing portion 3531Z. Of course, in other embodiments, as shown in fig. 44, the first fixing cover 381Z and the second fixing cover 382Z are disposed on the front and rear sides of the push tube 112Z, wherein the first fixing cover 381Z is located on the rear side of the push tube 112Z, the second fixing cover 382Z is located on the front side of the push tube 112Z, the first fixing cover 381Z and the second fixing cover 382Z enclose and form a through hole for the operation member 330Z to pass through together, and the first fixing cover 381Z is provided with an operation hole 3811Z.

Fig. 45 is a partial structural perspective view showing a cart frame 1000Z according to a second embodiment of the present invention. The stroller frame 1000Z is similar to the first embodiment described above and includes the stroller frame 100Z, the wheel frame 200Z, the wheel base 230Z, and the lock release mechanism 300Z. The cart frame 1000Z of the present embodiment is a modification of the cart frame 1000Z of the first embodiment described above. The structure of the components and the connection relationship between the components in the present embodiment can be referred to the description in the above first embodiment without conflict, and differences from the above first embodiment in the present embodiment will be mainly described below.

In the present embodiment, "the upper handle 110Z moves relative to the lower handle 120Z" means that the upper handle 110Z is rotatable relative to the lower handle 120Z. The upper and lower handle bars 110Z and 120Z are restrained or allowed to rotate relative to each other by a height adjustment locking mechanism 130Z. Specifically, in one embodiment, as shown in fig. 45 to 47, the height adjustment locking mechanism 130Z includes a first connection seat 138Z, a second connection seat 139Z, and a second locking piece 1311Z. The first connecting seat 138Z is connected with the upper cart frame 110Z, the second connecting seat 139Z is connected with the lower cart frame 120Z and pivotally connected with the first connecting seat 138Z, and the second locking member 1311Z is movably disposed between the first connecting seat 138Z and the second connecting seat 139Z along an axial direction to limit or allow the first connecting seat 138Z and the second connecting seat 139Z to pivot relatively, thereby limiting or allowing the upper cart frame 110Z to rotate relatively to the lower cart frame. When the upper carriage 110Z rotates relative to the lower carriage 120Z about the height adjustment locking mechanism 130Z, the height of the upper carriage 110Z (specifically, the push tube 112Z) relative to the ground can be changed (see fig. 46), so that users with different heights can be adapted to hold the push tube 112Z. In this embodiment, for clarity of understanding of the position of the upper handle 110Z after the upper handle 120Z is rotated relative to the lower handle 120Z, the different positions of the upper handle 110Z after the upper handle 120Z is rotated relative to the lower handle are marked with dashed lines in fig. 46.

Referring to fig. 47 to 49, in the present embodiment, a first cavity 1381Z is disposed on a side of the first connecting seat 138Z facing the second connecting seat 139Z, and a first locking groove 1382Z is disposed on a sidewall of the first cavity 1381Z. The second connecting seat 139Z is provided with a second chamber 1391Z on a side facing the first connecting seat 138Z, and a second locking groove (not shown) is provided on a side wall of the second chamber 1391Z. The second locking piece 1311Z is provided with a locking tooth 13111Z and has a locking position and a unlocking position. Specifically, when the second locking piece 1311Z is in the locked position, the locking tooth 13111Z simultaneously snaps into the first locking groove 1382Z and the second locking groove, which may limit the first connector seat 138Z from pivoting relative to the second connector seat 139Z. When the second locking member 1311Z is in the unlocked position, the locking tooth 13111Z is withdrawn from either the first locking slot 1382Z or the second locking slot, which may allow the first connector seat 138Z to pivot relative to the second connector seat 139Z.

With continued reference to fig. 47 to 49, in this embodiment, the height adjustment locking mechanism 130Z further includes a driving member 1312Z, where the driving member 1312Z is movably disposed on a side of the first connecting seat 138Z opposite to the second connecting seat 139Z, and the driving member 1312Z axially passes through the first connecting seat 138Z and abuts against the second locking member 1311Z to enable the second locking member 1311Z to be driven to move, so that the second locking member 1311Z can be withdrawn from the first locking groove 1382Z. Specifically, referring to fig. 42 and 47-49, the height adjustment locking mechanism 130Z further includes a second traction member 137Z, and the second traction member 137Z is connected between the driving member 1312Z and the second lock release member 320Z. When the height of the handlebar 100Z needs to be adjusted, the operating member 330Z is operated to drive the second release locking member 320Z to rotate, so that the driving member 1312Z is driven to move under the transmission action of the second traction member 137Z to push the second locking member 1311Z to completely retract into the second cavity 1391Z. Of course, in other embodiments, the driving member 1312Z may be movably disposed on a side of the second connecting seat 139Z opposite to the first connecting seat 138Z, and the driving member 1312Z passes through the second connecting seat 139Z along an axial direction and abuts against the second locking member 1311Z to be capable of driving the second locking member 1311Z to move, so that the second locking member 1311Z can be withdrawn from the second locking groove. When the height of the handlebar 100Z needs to be adjusted, the operating member 330Z is operated to drive the second release locking member 320Z to rotate, so that the second traction member 137Z is transferred to move the driving member 1312Z to push the second locking member 1311Z to completely retract into the first chamber 1381Z.

In the present embodiment, the third restoring member 135Z is axially abutted between the second locking member 1311Z and the second connecting seat 139Z and is configured to enable the second locking member 1311Z to be held in the locking position. In addition, in the present embodiment, when the height of the handlebar 100Z needs to be adjusted, the user can push the second locking member 1311Z by directly operating (e.g., pressing) the driving member 1312Z, without operating the operating member 330Z.

In this embodiment, the first traction member 540Z may be directly inserted between the first connector base 138Z and the second connector base 139Z to extend into the wheel frame 200Z through the height adjustment locking mechanism 130Z. Of course, in other embodiments, as shown in fig. 50, the height adjustment locking mechanism 130Z may further include a cover 1341Z, the cover 1341Z may be connected with the first connecting seat 138Z or the second connecting seat 139Z, for example, and a penetrating space 1342Z may be formed between the cover 1341Z and the first connecting seat 138Z or the second connecting seat 139Z, and the first traction member 540Z is penetrated in the penetrating space 1342Z. Specifically, when the driving member 1312Z is movably disposed on a side of the first connecting seat 138Z facing away from the second connecting seat 139Z, the cover 1341Z is disposed on a side of the second connecting seat 139Z facing away from the first connecting seat 138Z and forms a penetrating space 1342Z with the second connecting seat 139Z. When the driving member 1312Z is movably disposed on a side of the second connecting seat 139Z facing away from the first connecting seat 138Z, the cover 1341Z is disposed on a side of the first connecting seat 138Z facing away from the second connecting seat 139Z and forms a penetrating space 1342Z with the first connecting seat 138Z.

The cart frame 1000Z and the lock release mechanism 300Z thereof have the following technical effects:

the cart frame 1000Z includes a lock release mechanism 300Z. In the above-described release lock mechanism 300Z, since the first release lock 310Z is rotatably provided on the cart frame 1000Z and is in driving connection with the wheel lock mechanism 500Z, the second release lock 320Z is rotatably provided on the cart frame 1000Z and is in driving connection with the height adjustment lock mechanism 130Z, and the operation member 330Z is movable and is used to drive either one of the first release lock 310Z and the second release lock 320Z to rotate, wherein the wheel lock mechanism 500Z is capable of allowing the wheel 240Z to rotate with the wheel carrier 230Z relative to the rear wheel carrier 220Z to drift and turn, and the height adjustment lock mechanism 130Z is capable of allowing the upper carriage 110Z to move relative to the lower carriage 120Z. Therefore, the user can control the first lock release member 310Z to rotate by driving the operation member 330Z, and thus indirectly control the wheel locking mechanism 500Z, so that the cart frame 1000Z has a drift steering function. Meanwhile, the user can control the second lock release member 320Z to rotate by driving the operation member 330Z, and further indirectly control the height adjustment locking mechanism 130Z, so that the overall height of the handlebar 100Z is adjustable. Just because the user only needs to operate the lock release mechanism 300Z to control different locking mechanisms respectively, the operation convenience of the user is improved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims

1. A release mechanism, applicable to a cart frame, the cart frame comprising an upper hand frame, a lower hand frame, a wheel frame, a height adjustment locking mechanism and a folding locking mechanism, the upper hand frame and the lower hand frame are restricted or allowed to move relative to each other by the height adjustment locking mechanism, the lower hand frame is pivotally connected to the wheel frame and is restricted or allowed to pivot relative to each other by the folding locking mechanism, characterized in that the release mechanism comprises:

A first release member is rotatably disposed on the cart frame, wherein the first release member is drivingly connected to the folding and locking mechanism to allow the lower handle frame to pivot relative to the wheel frame;

a second release member rotatably disposed on the cart frame, the second release member being drivingly connected to the height adjustment locking mechanism to allow the upper hand frame to move relative to the lower hand frame; and

The operating member is movably disposed on the cart frame and is suitable for driving either the first releasing member or the second releasing member to rotate.

2. A release mechanism, applicable to a cart frame, the cart frame comprising a driver frame, a wheel frame, a reversing locking mechanism and a folding locking mechanism, the driver frame being rotatably arranged on the wheel frame, the reversing locking mechanism and the folding locking mechanism being arranged between the driver frame and the wheel frame, the driver frame being able to be restricted or allowed to rotate relative to the wheel frame for reversing by the reversing locking mechanism, and the driver frame being able to be restricted or allowed to rotate relative to the wheel frame for folding by the folding locking mechanism, characterized in that the release mechanism comprises:

A first release member is rotatably disposed on the cart frame and drivingly connected to the reversing locking mechanism to allow the rider frame to rotate relative to the wheel frame to change direction;

A second release member is rotatably disposed on the cart frame and drivingly connected to the folding and locking mechanism to allow the handle frame to rotate relative to the wheel frame to be folded; and

The operating member is movably arranged on the cart frame and selectively drives the first releasing member or the second releasing member to rotate.

3. The lock releasing mechanism according to claim 1 or 2 is characterized in that the lock releasing mechanism also includes a safety lock, which is movably arranged on the cart frame and can be switched between a first position and a second position; when the safety lock is located at the first position, the operating member is driven and connected to the first lock releasing member through the safety lock; when the safety lock is located at the second position, the operating member is driven and connected to the second lock releasing member through the safety lock.

4. The lock release mechanism according to claim 3, wherein the safety lock comprises:

a toggle member, movably disposed on the cart frame along a first direction and switchable between the first position and the second position;

A first linking member, movably connected to the toggle member along a second direction, and drivingly connected to the first release member; and

A second linking member, movably connected to the toggle member along a second direction, and drivingly connected to the second release member;

Wherein, the first direction intersects with the second direction, and the operating member can move along the second direction relative to the cart frame; when the toggle member is located at the first position, the operating member can be operated to push the first linking member to move and cause the first release member to rotate; when the toggle member is located at the second position, the operating member can be operated to push the second linking member to move and cause the second release member to rotate.

5. The release mechanism according to claim 1, characterized in that:

A first connecting portion is provided on the first release member, the first connecting portion is offset from the rotation center of the first release member, and the first connecting portion is used to connect the folding and locking mechanism; a second connecting portion is provided on the second release member, the second connecting portion is offset from the rotation center of the second release member, and the second connecting portion is used to connect the height adjustment locking mechanism.

6. A cart frame, characterized in that it comprises an upper hand frame, a lower hand frame, a wheel frame, a folding locking mechanism, a height adjustment locking mechanism and the release mechanism according to claim 1, wherein the upper hand frame and the lower hand frame are restricted or allowed to move relative to each other by the height adjustment locking mechanism, the lower hand frame is pivotally connected to the wheel frame and is restricted or allowed to pivot relative to each other by the folding locking mechanism, the release mechanism is arranged on the hand frame or the wheel frame and is respectively driven and connected to the folding locking mechanism and the height adjustment locking mechanism to allow the lower hand frame to pivot relative to the wheel frame and the upper hand frame to move relative to the lower hand frame.

7. A cart frame having an unfolded state and a folded state, characterized in that it comprises:

Wheel frame;

A driver frame, rotatably disposed on the wheel frame;

A reversing locking mechanism is arranged between the driver frame and the wheel frame, and the driver frame can be restricted or allowed to rotate relative to the wheel frame to change direction by the reversing locking mechanism;

a folding and locking mechanism, disposed between the rider frame and the wheel frame, wherein the rider frame can be folded by limiting or allowing the rider frame to rotate relative to the wheel frame; and

The release mechanism described in claim 2 is arranged on the rider frame and is drivingly connected to the folding locking mechanism and the release mechanism respectively, so as to allow the rider frame to rotate relative to the wheel frame to change direction or fold.

8. A release mechanism, applicable to a cart frame, the cart frame comprising a driver frame, a wheel frame, a wheel seat and a wheel locking mechanism, the driver frame comprising an upper driver frame, a lower driver frame and a height adjustment locking mechanism arranged therebetween, the upper driver frame and the lower driver frame are restricted or allowed to move relative to each other by the height adjustment locking mechanism; the wheel seat is rotatably connected to the wheel frame, the wheel locking mechanism is arranged between the wheel frame and the wheel seat and is used to restrict or allow the wheel seat to rotate relative to the wheel frame, characterized in that the release mechanism comprises:

A first release member, rotatably disposed on the cart frame and drivingly connected to the wheel locking mechanism to allow the wheel seat to rotate relative to the wheel frame;

a second release member rotatably disposed on the cart frame and drivingly connected to the height adjustment locking mechanism to allow the upper hand frame to move relative to the lower hand frame; and

9. A cart frame, characterized in that it comprises: a driver frame, a wheel frame, a wheel seat, a wheel locking mechanism and the release mechanism as described in claim 8, wherein the driver frame comprises an upper driver frame, a lower driver frame and a height adjustment locking mechanism arranged therebetween, wherein the upper driver frame and the lower driver frame are restricted or allowed to move relative to each other through the height adjustment locking mechanism; the wheel seat is rotatably connected to the wheel frame, the wheel locking mechanism is arranged between the wheel frame and the wheel seat, and is used to restrict or allow the wheel seat to rotate relative to the wheel frame, and the release mechanism is arranged on the driver frame and is drivingly connected to the wheel locking mechanism and the height adjustment mechanism respectively to allow the wheel seat to rotate relative to the wheel frame and the upper driver frame to move relative to the lower driver frame.

10. The cart frame according to claim 9, wherein the wheel locking mechanism comprises:

A first locking recess, disposed on the wheel seat;

A first locking member, movably disposed on the wheel frame and adapted to be locked with the first locking recess; and

A first traction member connected between the first release member and the first locking member;

When the first locking member extends into the first locking recess to lock the fit, the wheel seat is restricted from rotating relative to the wheel frame. When the first releasing member drives the first locking member to withdraw from the first locking recess to release the fit through the first traction member, the wheel seat is allowed to rotate relative to the wheel frame.

11. The stroller frame according to claim 10, wherein the first traction member is disposed in the rider frame and the wheel frame and passes through the height adjustment locking mechanism.

12. The cart frame according to claim 11 is characterized in that the height adjustment locking mechanism includes a support seat, the support seat is provided with a first through-channel, and the first through-channel is a U-shaped channel, and one end of the first traction member away from the first release member extends from one end of the U-shaped channel and extends from the other end of the U-shaped channel, so that the first traction member is arranged around the support seat.

13. The cart frame according to claim 9, wherein the upper handlebar is slidable relative to the lower handlebar, and the height adjustment locking mechanism comprises:

A second locking portion is provided on the lower handrail;

A second locking assembly, movably disposed on the upper hand frame and adapted to be locked with the second locking portion; and

A second traction member connected between the second release member and the second locking assembly;

When the second locking assembly extends into the second locking portion to lock the upper handrail, the upper handrail is restricted from sliding relative to the lower handrail; when the second release member drives the second locking assembly to withdraw from the second locking portion to release the engagement through the second traction member, the upper handrail is allowed to slide relative to the lower handrail; or,

The height adjustment locking mechanism comprises:

A first connecting seat connected to the upper handrail;

A second connecting seat connected to the lower hand frame and pivotally connected to the first connecting seat; and

A second locking member is movably disposed between the first connecting seat and the second connecting seat in the axial direction to limit or allow the two to pivot relative to each other;

A driving member, movably disposed on the first connecting seat or the second connecting seat, the driving member axially passes through the first connecting seat or the second connecting seat and abuts against the second locking member to drive the second locking member to move; and

The second traction member connects the driving member and the second releasing member. When the second releasing member is operated, the second traction member drives the second locking member to move through the driving member to allow the first connecting seat to pivot relative to the second connecting seat.

14. The stroller frame according to claim 13, characterized in that:

The height adjustment locking mechanism further comprises a support seat, the support seat is provided with a first through-passage and a second through-passage, the first through-passage is a U-shaped passage, the second through-passage is a straight-line passage, and the second traction member is accommodated in the straight-line passage;

The wheel locking mechanism includes a first traction member, which is arranged in the wheel frame and the driver frame and passes through the U-shaped channel.