CN120922214A

CN120922214A - Barrows

Info

Publication number: CN120922214A
Application number: CN202511140710.9A
Authority: CN
Inventors: 李照国; 孙光
Original assignee: Goodbaby Child Products Co Ltd
Current assignee: Goodbaby Child Products Co Ltd
Priority date: 2025-08-14
Filing date: 2025-08-14
Publication date: 2025-11-11

Abstract

This invention relates to a trolley, comprising a front support, a rear support, a push rod frame, and a linkage frame. The upper part of the front support is rotatably connected to the upper part of the rear support about a first axis. The push rod frame is rotatably connected to the rear support about a second axis. The linkage frame is movably connected between the lower parts of the front support and the push rod frame. When the push rod frame rotates backward relative to the rear support to retract, the linkage frame is driven by the upward movement of the lower part of the push rod frame, causing the front support and the rear support to retract relative to each other in the front-rear direction. When the trolley is unlocked, the push rod frame can flip backward under its own weight, thereby causing the various rods on the trolley to move relative to each other and gradually retract, thus realizing automatic folding or assisted folding of the trolley. This simplifies the folding process, allowing the entire folding operation to be completed with one hand, bringing convenience to the user's daily use.

Description

Barrows

Technical Field

The invention relates to a trolley, in particular to a foldable trolley.

Background

In the prior art, carts have typically had a foldable frame to fold them up for reduced space usage when they are carried on a daily basis or not in use. However, the structure of the existing carts on the market is various, and when the carts are folded, the folding operation can be realized only by completely manually driving each rod member to move relatively by an operator, and the folding operation is often performed in multiple steps and is usually completed by two hands, so that the carts are inconvenient for daily use of users.

Disclosure of Invention

The invention aims to provide a novel-structure trolley, so that the trolley is convenient to fold.

In order to achieve the aim, the technical scheme is that the trolley comprises an unfolding state and a folding state, the trolley comprises a front support, a rear support, a push rod frame and a linkage frame, the upper portion of the front support is rotationally connected with the upper portion of the rear support around a first axial lead, the push rod frame is rotationally connected to the rear support around a second axial lead, the linkage frame is movably connected between the front support and the lower portion of the push rod frame, and when the push rod frame is rotationally folded backwards relative to the rear support, the linkage frame is driven by upward movement of the lower portion of the push rod frame to enable the front support and the rear support to be folded mutually along the front-rear direction.

In some embodiments, the front part of the linkage frame is rotatably connected to the front bracket around a third axis, the rear part of the linkage frame is rotatably connected to the lower part of the push rod frame around a fourth axis, and when the push rod frame is folded back relative to the rear bracket, the lower part of the push rod frame and the rear part of the linkage frame move upwards to drive the front bracket and the rear bracket to fold in the front-back direction.

In some embodiments, the second axis, the third axis, and the fourth axis are all vertically lower than the first axis when the cart is in the expanded state and in the collapsed state.

In some embodiments, the cart is in an expanded state with the fourth axis vertically lower than the second axis, and in a collapsed state with the fourth axis higher than the second axis.

In some embodiments, when the cart is in the unfolded state, the connection line between the third axis and the second axis forms an axis connection line, the fourth axis is located below the axis connection line, and when the cart is converted from the unfolded state to the folded state, the front support moves in a direction away from the rear support and then moves in a direction approaching the rear support.

In some embodiments, the projection of the third axis and the fourth axis in a vertical plane forms a first connection line, the projection of the second axis and the fourth axis in the vertical plane forms a second connection line, an included angle between the first connection line and the second connection line is 150-180 degrees, and the whole push rod frame extends linearly.

In some embodiments, the cart further comprises a seat assembly, the seat assembly comprises a seat frame and a sliding member, the sliding member is rotatably arranged on the front bracket, the seat frame can be relatively slidably connected with the sliding member along the length direction of the seat frame, and the rear part of the seat frame is rotatably connected with the linkage frame or the push rod frame, or the rear part of the seat frame, the rear part of the linkage frame and the lower part of the push rod frame are jointly rotatably connected around the fourth axis.

In some embodiments, the rear portion of the seat frame is rotatably connected to the push rod frame about a fifth axis, the fifth axis being located between the second axis and the fourth axis along a length extension of the push rod frame.

In some embodiments, the sliding member is rotatably connected to the front bracket about a sixth axis, wherein the sixth axis is always located above the third axis along a length extension of the front bracket, and/or a distance between the sixth axis and the second axis is smaller than a distance between the sixth axis and the third axis.

In some embodiments, the cart further comprises a push handle rack, the lower portion of the push handle rack and the upper portion of the push rod rack are rotatably connected around a seventh axis, wherein projections of the fourth axis, the second axis and the seventh axis on the same vertical plane are arranged in a collinear manner.

In some embodiments, the rear bracket comprises a rear bracket body and a connecting end protruding from the rear bracket body towards the direction of the front bracket, the rear bracket body and the upper part of the front bracket are rotatably connected around the first axial line, the push rod frame is rotatably connected on the connecting end around the second axial line, wherein in the unfolded state of the cart, the second axial line is positioned on the front side of the rear bracket body, and the distance between the third axial line and the fourth axial line is larger than the distance between the fourth axial line and the second axial line.

Due to the application of the technical scheme, the trolley provided by the embodiment of the invention has the advantages that when the push rod frame is folded in a backward relative rotation manner relative to the rear support, the lower part of the push rod frame can drive the linkage frame to move in the upward movement process, and the linkage frame moves to drive the front support and the rear support to fold in the front-rear direction, so that the trolley is converted from an unfolded state to a folded state, and the trolley is folded. Like this, after the shallow unblock, push rod frame can overturn backward under the dead weight effect to drive each member relative motion on the shallow and draw in gradually, and then realize the automatic folding of shallow or the folding of supplementary shallow, this makes the folding step of shallow simplified, and the folding operation of whole shallow can be accomplished to the singlehanded, brings convenience for user's daily use.

Drawings

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

Fig. 1 is a schematic perspective view of a cart in an unfolded state according to an embodiment of the present invention;

FIG. 2 is an exploded schematic view of the cart of FIG. 1;

FIG. 3 is a schematic side elevational view of the cart of FIG. 1;

FIG. 4 is a schematic perspective view of the cart of FIG. 1 after the handle frame is turned over and folded relative to the pusher frame;

FIG. 5 is a schematic side view of the cart of FIG. 4;

FIG. 6 is a schematic perspective view of the push rod frame turned back on the basis of FIG. 4 to enable the cart to be folded;

FIG. 7 is a schematic side elevational view of the cart of FIG. 6;

FIG. 8 is a schematic perspective view of the cart of FIG. 1 in a folded state;

FIG. 9 is a schematic side elevational view of the cart of FIG. 8;

FIG. 10 is a schematic diagram of a front view of the cart of FIG. 8;

FIG. 11 is a schematic top view of the cart of FIG. 8;

FIG. 12 is a schematic side view of a cart in an expanded state according to another embodiment of the invention;

in the above figures:

1. Front support, 11, front strut, 12, front cross bar;

2. A rear bracket; 21, a rear strut, 22, a connecting end, 23, a rear cross bar;

3. Push rod rack, 31, push rod;

4. a push handle rack 41 and a push handle bar;

5. A linkage frame, a linkage rod and a linkage rod;

6. seat assembly 61, slide member 62, seat bar;

10. Front wheel assembly, 20, rear wheel assembly;

X1, a first axis, X2, a second axis, X3, a third axis, X4 and a fourth axis;

X5, a fifth axis, X6, a sixth axis, X7, a seventh axis.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art. The description of these embodiments is provided to assist understanding of the present invention, but is not intended to limit the present invention. In addition, technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

The orientations indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc., are defined herein with reference to orientations that an operator is standing on one side of the cart and observing when the cart is pushed against, based on the cart being in an unfolded state, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Referring to fig. 1 to 11, a cart having an unfolded state and a folded state includes a front frame 1, a rear frame 2, a push rod frame 3, and a link frame 5, wherein a front wheel assembly 10 is provided at a lower portion of the front frame 1, a rear wheel assembly 20 is provided at a lower portion of the rear frame 2, an upper portion of the front frame 1 and an upper portion of the rear frame 2 are rotatably connected about a first axis X1, the push rod frame 3 is rotatably connected to the rear frame 2 about a second axis X2, and the link frame 5 is movably connected between the front frame 1 and the push rod frame 3. When the push rod frame 3 rotates backwards relative to the rear support 2 to be folded, the lower part of the push rod frame 3 moves upwards, and the linkage frame 5 is driven by the push rod frame 3 to move relative to the front support 1, so that the front support 1 and the rear support 2 rotate mutually to be folded along the front-rear direction. Thus, when the trolley is folded, when the push rod frame 3 is turned backwards, the trolley can be converted from the unfolding state to the folding state, and the trolley is folded.

In this embodiment, when the cart is in an unfolded state, the linkage frame 5 extends approximately along the front-rear direction, the front portion of the linkage frame 5 is rotatably connected to the front bracket 1 around the third axis X3, the rear portion of the linkage frame 5 is rotatably connected to the lower portion of the push rod frame 3 around the fourth axis X4, and when the push rod frame 3 is folded in a rearward direction relative to the rear bracket 2, the lower portion of the push rod frame 3 and the rear portion of the linkage frame 5 move upward, so as to drive the front bracket 1 and the rear bracket 2 to be folded gradually along the front-rear direction.

In this embodiment, as shown in fig. 3 and 9, when the cart is in an unfolded state and in a folded state, the second axis X2, the third axis X3 and the fourth axis X4 are all lower than the first axis X1 in the vertical direction, so that the distance between the second axis X2 and the fourth axis X4 on the push rod frame 3 can be sufficiently small, the rod section on the push rod frame 3 above the second axis X2 can be sufficiently long, and in the unfolded state, the push rod frame 3 is generally arranged in a gradually inclined and extended manner from front to back, so that when the locking mechanism on the cart is unlocked, the push rod frame 3 can be turned back relative to the rear bracket 2 by virtue of self gravity without applying external force, and other rods on the cart are driven to rotate, so that the cart can realize automatic folding or auxiliary folding by virtue of self weight, and the folding operation of the cart is more convenient and labor-saving.

In this embodiment, when the cart is in an unfolded state, the fourth axis X4 is located between the second axis X2 and the third axis X3, and the fourth axis X4 is lower than the second axis X2 in the vertical direction, as shown in fig. 3, a connecting line between the second axis X2 and the third axis X3 forms an axis connecting line L0, and the fourth axis X4 is located below the axis connecting line L0, when the cart is converted from the unfolded state to the folded state, the front bracket 1 moves in a direction away from the rear bracket 2 and then moves in a direction approaching the rear bracket 2 under the action of the push rod frame 3 and the linkage frame 5. When the cart is in a folded state, after the push rod frame 3 is overturned relative to the rear support 2 around the second axial line X2, the fourth axial line X4 is higher than the second axial line X2 along the vertical direction, as shown in FIG. 9, the push rod frame 3 and the linkage frame 5 can be tightly folded with the front support 1 and the rear support 2, so that the thickness of the folded cart is reduced as much as possible, and the whole structure of the cart is smoother and more compact.

In this embodiment, when the cart is in the unfolded state, the connection line between the third axis X3 and the fourth axis X4 is projected in a vertical plane to form a first connection line L1, and the connection line between the second axis X2 and the fourth axis X4 is projected in the vertical plane to form a second connection line L2, where the angle α between the first connection line L1 and the second connection line L2 is 150 ° to 180 °, that is, when the cart is in the unfolded state, the extending direction of the linkage frame 5 and the length extending direction of the push rod frame 3 are located in the same line, or close to the same line, which further makes the distance between the second axis X2 and the fourth axis X4 small enough, and the length of the rod segment located behind the second axis X2 on the push rod frame 3 can be far greater than the length of the rod segment located in front of the second axis X2, so that the push rod frame 4 is more favorable to fold back relative to the rear support 2 by self gravity, and meanwhile, the whole push rod frame 4 is more convenient to extend in a straight line when being formed. In this embodiment, the length of the first connecting line L1 is greater than that of the second connecting line L2, and the connecting line between the front bracket 1 and the rear bracket 2 of the linkage frame 5 and the push rod frame 3 is smooth, so that the overall appearance line of the cart is smoother and the structure is simpler.

Referring to the drawings, the cart further includes a seat assembly 6, the seat assembly 6 including a seat frame 62 and a slider 61, the slider 61 being rotatably provided on the front frame 1, the seat frame 62 being relatively slidably coupled to the slider 61 in a longitudinal direction thereof, and a rear portion of the seat frame 62 being rotatably coupled to the link frame 5 or rotatably coupled to the push rod frame 3, or a rear portion of the seat frame 62, a rear portion of the link frame 5 and a lower portion of the push rod frame 3 being rotatably coupled together about a fourth axis X4. Specifically, in the embodiment shown in fig. 1 to 11, the rear portion of the seat frame 62, the rear portion of the link frame 5 and the lower portion of the pusher frame 3 are rotatably connected together about a fourth axis X4, and in the other embodiment shown in fig. 12, the rear portion of the seat frame 62 is rotatably connected to the lower portion of the pusher frame 3 about a fifth axis X5, and the fifth axis X5 is located between the second axis X2 and the fourth axis X4. When the push rod frame 3 is turned backwards around the second axis line X2 relative to the rear bracket 2 to fold, the push rod frame 3 drives the rear part of the seat frame 62, or drives the rear part of the seat frame 62 to move upwards through the linkage frame 5, so that the seat frame 62 is driven to turn and slide relative to the sliding piece 61, and the seat frame 62 and the front bracket 1 are folded mutually.

The sliding member 61 is rotatably connected to the front bracket 1 around a sixth axis X6, and in the extending direction along the length of the front bracket 1, the sixth axis X6 is always located above the third axis X3, and the distance between the sixth axis X6 and the second axis X2 is smaller than the distance between the sixth axis X6 and the third axis X3, so that the seat frame 62 can be at a higher height position on the front bracket 1, and at the same time, when the cart is folded, the seat frame 62 can be folded in the front side of the linkage frame 5, so that each rod can be folded in sequence in the front-rear direction.

The trolley further comprises a push handle frame 4, the lower part of the push handle frame 4 is rotatably connected with the upper part of the push rod frame 3 around a seventh axis X7, and projections of the fourth axis X4, the second axis X2 and the seventh axis X7 in the same vertical plane are arranged in a collinear way, namely the push rod frame 3 integrally extends along the same straight line direction. When the trolley is folded, the push handle frame 4 and the push rod frame 3 rotate mutually to fold, so that the whole trolley has larger dead weight, and after the trolley is unlocked, the push handle frame 4 and the push rod frame 3 can be overturned and folded more smoothly relative to the rear bracket 2.

In the cart of the embodiment, the components are specifically configured as follows:

Referring to fig. 2, the front bracket 1 includes two sets of front struts 11 respectively disposed at left and right sides and extending in an up-down direction, and front cross bars 12 respectively disposed between lower portions of the two sets of front struts 11 and extending in the left-right direction, a front wheel assembly 10 is disposed at a bottom of each set of front struts 11, the rear bracket 2 includes a rear bracket body, and connection ends 22 respectively formed by protruding from the rear bracket body toward the front bracket 1, where the rear bracket body includes two sets of rear struts 21 respectively disposed at left and right sides and extending in the up-down direction, and rear cross bars 22 respectively disposed between lower portions of the two sets of rear struts 21 and extending in the left-right direction, and each set of rear struts 21 is provided with a connection end 22 at an upper portion thereof. In the unfolded state of the cart, the connecting end 22 is spaced from the top of the rear strut 21, and the connecting end 22 extends obliquely forward and downward from the rear strut 21.

The push rod frame 3 includes two sets of push rods 31 respectively disposed at the left and right sides and extending in the up-down direction, and the push rod frame 4 includes a U-shaped push rod, the lower ends of the left and right sides of which are respectively rotatably connected with the upper ends of the two sets of push rods 31. The linkage frame 5 comprises two linkage rods 51 respectively arranged at the left side and the right side, a seat frame 62 in the seat assembly 6 is a U-shaped rod with an opening arranged backwards, the sliding piece 61 is specifically a sliding sleeve, and two side rods of the U-shaped rod of the seat frame 62 are respectively sleeved with the sliding piece 61 in a sliding way. On each of the left and right sides of the cart, the upper portion of the front strut 11 is rotatably connected to the upper portion of the rear strut 21, the push rod 31 is rotatably connected to the lower end portion of the connection head 22, and the link rod 51 is rotatably connected between the front strut 11 and the lower portion of the push rod 31. The front struts 11 on each side are rotatably connected with sliders 61, and the seat frame 62 is slidably connected with the sliders 61 on both sides and rotatably connected with the push rods 31 on both sides.

Referring to fig. 1 to 3, in the unfolded state of the cart of this embodiment, the front frame 1 and the rear frame 2 are relatively unfolded along the front-rear direction and supported on the ground by the front wheel assembly 10 and the rear wheel assembly 20, the push rod frame 3 and the push rod frame 4 are relatively unfolded and gradually extend upwards from front to rear along the same length direction, the linkage frame 5 is connected between the front frame 1 and the lower portion of the push rod frame 3 and is in a shape of extending upwards and backwards, and the whole appearance of the cart is compact. When the cart needs to be folded, the push handle frame 4 is turned over and folded relative to the push handle frame 3, as shown in fig. 4 and 5, then an operator can loosen his hands, the push handle frame 3 and the push handle frame 4 are turned back relative to the rear bracket 2 under the action of dead weight, the lower part of the push handle frame 3 moves upwards to drive the rear part of the linkage frame 5 to move upwards, the linkage frame 5 rotates relative to the front bracket 1 to drive the front bracket 1 and the rear bracket 2 to rotate relatively and move relatively in the front-rear direction, as shown in fig. 6 and 7, during which the rear part of the seat frame 62 moves upwards and the seat frame 62 slides relative to the sliding piece 61 and rotates relative to the front bracket 1, and finally the front bracket 1, the rear bracket 2, the push handle frame 3 and the push handle frame 4 are folded together in the front-rear direction, and the seat frame 62 and the linkage frame 5 are folded between the front bracket 1 and the rear bracket 2, as shown in fig. 8-11. When specifically setting up, can also set up the carrying strap in the position department that front support 1 and rear support 2 upper portion rotated and be connected, after the shallow is folding like fig. 6, 7 state, the operator just can upwards mention this shallow through carrying the strap for the shallow is accomplished and is folded up, and mentions the shallow simultaneously, and this is more convenient when daily use, especially when only can vacate single hand and fold the shallow, and the folding convenience of this shallow has brought very big facility for the user.

It is to be understood that the same or similar parts in the above embodiments may be referred to each other, and that in some embodiments, the same or similar parts in other embodiments may be referred to.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. If a definition used herein contradicts or is inconsistent with a definition set forth in other publications, the definition used herein should prevail.

It should also be noted that "rotational connection" in the above embodiments refers to a pivotal connection unless the context clearly indicates otherwise.

As used in this specification and in the claims, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus.

It is further understood that the term "plurality" in this disclosure means two or more, and other adjectives are similar thereto. "and/or" describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate that there are three cases of a alone, a and B together, and B alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. The singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It is further understood that the terms "first," "second," and the like are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the expressions "first", "second", etc. may be used entirely interchangeably. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.

The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A trolley having an unfolded state and a folded state, characterized in that: the trolley includes a front support, a rear support, a push rod frame, and a linkage frame; the upper part of the front support is rotatably connected to the upper part of the rear support about a first axis; the push rod frame is rotatably connected to the rear support about a second axis; and the linkage frame is movably connected between the lower parts of the front support and the push rod frame, such that when the push rod frame rotates backward relative to the rear support to retract, the linkage frame is driven by the upward movement of the lower part of the push rod frame, causing the front support and the rear support to retract relative to each other in the front-rear direction.

2. The trolley according to claim 1, characterized in that: the front part of the linkage frame is rotatably connected to the front support about a third axis, and the rear part of the linkage frame is rotatably connected to the lower part of the push rod frame about a fourth axis; when the push rod frame rotates and retracts relative to the rear support, the lower part of the push rod frame and the rear part of the linkage frame both move upward, driving the front support and the rear support to retract in the front-rear direction.

3. The trolley according to claim 2, characterized in that: when the trolley is in an unfolded state and in a folded state, the second axis line, the third axis line and the fourth axis line are all lower than the first axis line in the vertical direction.

4. The trolley according to claim 2, characterized in that: when the trolley is in the unfolded state, the fourth axis is lower than the second axis in the vertical direction; when the trolley is in the folded state, the fourth axis is higher than the second axis.

When the trolley is in the unfolded state, the line connecting the third axis and the second axis forms an axis line, and the fourth axis is located below the axis line. When the trolley is transitioning from the unfolded state to the folded state, the front support first moves away from the rear support and then moves closer to the rear support.

5. The trolley according to claim 2, characterized in that: the third axis centerline and the fourth axis centerline are projected into a vertical plane and then connected to form a first connecting line; the second axis centerline and the fourth axis centerline are projected into the vertical plane and then connected to form a second connecting line; the included angle between the first connecting line and the second connecting line is 150° to 180°; the push rod frame extends in a straight line as a whole.

6. The trolley according to claim 2, characterized in that: the trolley further includes a seat assembly, the seat assembly including a seat frame and a sliding member, the sliding member being rotatably disposed on the front support, the seat frame being slidably connected to the sliding member along its own length direction, and the rear part of the seat frame being rotatably connected to the linkage frame or rotatably connected to the push rod frame, or the rear part of the seat frame, the rear part of the linkage frame and the lower part of the push rod frame being rotatably connected together around the fourth axis.

7. The trolley according to claim 6, characterized in that: the rear part of the seat frame is rotatably connected to the push rod frame about a fifth axis, and the fifth axis is located between the second axis and the fourth axis along the length extension direction of the push rod frame.

8. The trolley according to claim 6, characterized in that: the sliding member is rotatably connected to the front support about a sixth axis, wherein, along the length extension direction of the front support, the sixth axis is always located above the third axis, and/or, the distance between the sixth axis and the second axis is less than the distance between the sixth axis and the third axis.

9. The trolley according to claim 6, characterized in that: the trolley further includes a push handle frame, the lower part of the push handle frame being rotatably connected to the upper part of the push rod frame about a seventh axis, wherein the fourth axis, the second axis and the seventh axis are collinearly arranged in the projection of the same vertical plane.

10. The trolley according to claim 2, characterized in that: the rear support includes a rear support body and a connecting end extending from the rear support body toward the front support; the rear support body is rotatably connected to the upper part of the front support about the first axis; the push rod frame is rotatably connected to the connecting end about the second axis; wherein, when the trolley is in the unfolded state, the second axis is located on the front side of the rear support body; the distance between the third axis and the fourth axis is greater than the distance between the fourth axis and the second axis.