CN112278063B - Baby carriage - Google Patents

Abstract

The present application provides a stroller comprising: a cart, infant seat, and a braking mechanism; the trolley comprises a frame, wheels and a trolley handle; the braking mechanism is provided with a triggering component and a braking component; the trigger assembly has a first position and a second position; when both the pushing handle and the triggering component are in an initial state, the triggering component is positioned at a first position, so that the triggering component can periodically act on the braking component under the driving of rotation of the wheel, and the wheel is correspondingly braked in a spot braking mode; when the cart handle is controlled by a user to move in an operable manner, the trigger assembly is positioned at the second position so as to release the transmission fit between the trigger assembly and the wheels, and the wheels are correspondingly not restrained by braking, so that the cart is driven to move under the pushing of the user. The baby carriage is driven by a hand pushing mode, is simple in structure and convenient to operate, meets the use habit of a user, greatly simplifies the starting and stopping modes of the existing baby carriage, and is convenient and safe to operate.

Description

Baby carriage

Technical Field

The invention relates to the technical field of strollers, in particular to a stroller.

Background

The baby carriage is an indispensable child-care tool for modern families, and various types of baby carriages are available on the market, and have various functional forms, such as folding type, so as to be convenient to carry, or applicable type, and have light weight, simple appearance structure, simple operation and the like. According to the functional requirements of users, the strolling type baby carriage is generally divided into a strolling type baby carriage for walking or a fast walking type sports type baby carriage, and the strolling type baby carriage has various characteristics and meets the use requirements of different crowds.

At present, brake safety is a common problem of the baby carriage. In the aspect of a brake device, a shifting block foot brake mode is generally adopted, the main braking modes are friction braking, and the braking modes comprise disc braking, drum braking, disc braking or other traditional braking modes, however, the automatic safety protection cannot be realized in the mode, an automatic feedback system is not available, so that the automatic safety protection capability is lacked, and the mode requiring manual braking has great potential safety hazards. For example, when a brake block is shifted by a foot, the brake block is braked at one side at the beginning, and the brake block is braked at one side more than one side after the improvement, although the convenience is improved, the baby carriage cannot be controlled by accident sliding due to the fact that the manual brake is needed and forgetting is unavoidable.

In contrast, automatic braking based on chip control to achieve safety, such as speed sensors, inertial sensors, distance sensors, etc., is also occurring. But the brake is automatically controlled by the electronic chip, the manufacturing cost is high, the brake is limited by factors such as power supply, wiring and the like, and the structure and the connection mode are complex, so that the car body is heavy to a certain extent. The habit of the user on the baby carriage cannot be met, and therefore the structural design is also needed to be carried out from various aspects to meet the rationality of use.

Disclosure of Invention

The invention discloses a baby carriage, which is simple in structure and convenient to operate, and aims to solve the problems that the braking of the existing baby carriage is limited and the safety protection is lacking.

The invention adopts the following scheme:

the present application provides a stroller comprising: a cart, infant seat, and a braking mechanism; the trolley comprises a trolley frame, wheels arranged on the trolley frame and a trolley handle capable of moving relative to the trolley frame; the infant seat is configured on the trolley; the braking mechanism is provided with a triggering component which is linked with the trolley handle and a braking component which is arranged on the frame and can be controlled by the triggering component; the trigger assembly has a first position reset to be in driving engagement with the wheel in an initial state and a second position moved away from the wheel under the driving of the push handle bar to release the driving engagement; when both the pushing handle and the triggering component are in an initial state, the triggering component is located at a first position, so that the triggering component can periodically act on the braking component under the driving of rotation of the wheel, and the wheel is correspondingly braked in a point braking mode; when the cart handle is controlled by a user to move in an operable manner, the trigger assembly is located at the second position so as to release the transmission fit between the trigger assembly and the wheels, and the wheels are correspondingly free from the brake constraint, so that the cart is driven to move under the pushing of the user.

As a further improvement, the cart handle is arranged on the frame in a lever manner; the frame is provided with a supporting point, the trolley handle is hinged to the supporting point and is obliquely arranged on the frame, one side, close to a user, of the trolley handle is a power arm end, and one side, close to the trigger assembly, of the trolley handle is a resistance arm end.

As a further improvement, the trigger component comprises a sliding rod arranged at the end of the resistance arm and a cam rotatably arranged on the sliding rod; the cam is matched with the brake assembly, and correspondingly the cam can be contacted and matched with the brake assembly under the driving of the sliding rod.

As a further improvement, the frame comprises a front frame and a rear frame, and the front frame and the rear frame are butted to form a V-shaped bracket; the baby seat comprises a front frame, a rear frame, a support frame, a push handle and a support frame, wherein the support frame is transversely arranged between the front frame and the rear frame and used for bearing and configuring the baby seat, and the push handle and the rear frame are approximately in a V shape.

As a further improvement, the bottom of the rear frame is provided with two rear wheels in a combined way through a relatively transverse shaft body, and the front frame is correspondingly provided with two front wheels with adjustable intervals, so that the two front wheels are close to or far from each other and correspondingly form a tricycle or a quadricycle with the rear wheels.

As a further improvement, the shaft body is rotatably sleeved on the rear frame, and the rear wheels are fastened on two sides of the shaft body; the brake assembly comprises a brake pin which is elastically arranged between the shaft body and the rear frame, one end of the brake pin is arranged outside the frame so as to be controlled by the cam, and the other end of the brake pin is opposite to the shaft body and can drive the end part of the brake pin to abut against the shaft body when the cam abuts against the brake pin so as to limit the rotation of the shaft body.

When the trigger assembly is located at the first position, the cam is linked with the shaft body through the transmission assembly, so that the shaft body can drive the cam to rotate, at the moment, the outer periphery of the cam at least at a high position can be at least abutted to the brake pin to limit the rotation of the shaft body, and the outer periphery of the cam at least at a low position can be avoided from the brake pin.

As a further improvement, the transmission assembly at least comprises a first gear sleeved on the shaft body and a second gear which is configured on the trigger assembly and can be meshed with the first gear and the cam; the second gear is rotatably arranged on one side of the trigger assembly through a bearing and is always meshed with the cam; the second gear can move along with the trigger assembly, the second gear is meshed with the first gear correspondingly when the trigger assembly is located at a first position, and the second gear moves to avoid the first gear when the trigger assembly is located at a second position.

As a further improvement, the two sides of the shaft body are respectively provided with a transmission component, a triggering component and a braking component which are in linkage fit with each other.

As a further improvement, the support frame is vertically provided with a sleeve pipe, and the bottom of the infant seat is arranged in the sleeve pipe in a penetrating manner and can rotate relative to the opening direction of the sleeve pipe so as to adjust the sitting and lying angle of the infant seat; and, the ferrule is provided with a locking member, the end of the locking member can penetrate into the interior along the outer side of the ferrule to be abutted to the bottom of the baby seat; the bottom of the infant seat is correspondingly provided with a pair of spacing members arranged at intervals to limit the threshold value of the rotation of the infant seat in the sleeve pipe.

By adopting the technical scheme, the invention can obtain the following technical effects:

The baby carriage is driven in a hand-pushing mode, is simple in structure and convenient to operate, and meets the use habit of a user. When the stroller is not used, the stroller handle and the trigger assembly are both in initial states, and the corresponding trigger assembly is located at a first position, so that the trigger assembly can periodically act on the brake assembly under the driving of rotation of wheels, and the wheels are braked in a spot braking mode, so that unconstrained free sliding of the stroller is greatly avoided when a user does not drive the stroller to move (for example, the stroller handle is released by sliding on a slope or the user is released by releasing the stroller handle to cause uncontrolled movement), a good fool-proof protection effect is achieved, and the safety performance is good. When the baby carriage is used, the handcart handle is controlled by a user to move in an operable mode, the corresponding trigger assembly is positioned at the second position, the transmission fit between the trigger assembly and the wheels is relieved, the wheels are not constrained by the braking of the trigger assembly and the braking assembly, the handcart is driven to move under the pushing of the user, the pushing and the use of the baby carriage are realized, the operation of the user on the handlebar is ensured when the baby carriage is used, the working use or the braking stop of the handcart is controlled, the starting and stopping modes of the existing baby carriage are greatly simplified, and the baby carriage is convenient and safe to operate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a stroller in accordance with an embodiment of the present invention in a first viewing angle;

FIG. 2 is a schematic view of a stroller in accordance with an embodiment of the present invention in a second view;

FIG. 3 is a schematic view of a stroller according to an embodiment of the present invention in a third view;

FIG. 4 is a schematic view of a stroller according to an embodiment of the present invention in a fourth view;

FIG. 5 is a partial enlarged view at I in FIG. 4;

FIG. 6 is a schematic view of a stroller in accordance with an embodiment of the present invention in other viewing angles;

FIG. 7 is a schematic diagram showing the cooperation between a handlebar and a trigger assembly of a stroller in accordance with an embodiment of the present invention, wherein the lower diagram is a schematic diagram showing a state in which the trigger assembly is switched from a first position to a second position in the upper diagram, and an arrow direction of the lower diagram indicates a force and movement direction;

FIG. 8 is an enlarged view of a portion of FIG. 7 at II;

FIG. 9 is a schematic view of a stroller in accordance with an embodiment of the present invention in which the trigger assembly is in a second position;

FIG. 10 is a cross-sectional view of a trigger assembly, a transmission assembly, and a brake assembly of a stroller in accordance with an embodiment of the present invention;

FIG. 11 is a schematic view of the structure of FIG. 10 from other perspectives, wherein other stroller components are omitted for ease of illustration;

fig. 12 is a schematic view of the trigger assembly of fig. 9 in a first position.

Icon: 1-an infant seat; 11-limiting parts; 12-sliding shaft; 2-a frame; 21-a front frame; 22-a rear frame; 23-a support frame; 231-ferrule; 232-locking member; 24-shaft body; 25-front wheels; 26-rear wheels; 3-pushing the handle bar; a 4-trigger assembly; 41-a sliding rod; 42-cam; 43-half box; 5-a brake assembly; 51-a brake pin; 52-; 6-a transmission assembly; 61-a first gear; 62-a second gear; a-supporting point.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Examples

Referring to fig. 1 to 11, the present embodiment provides a stroller including: a trolley, a baby seat 1 and a braking mechanism. The cart includes a frame 2, wheels disposed on the frame 2, and a cart handle 3 movable relative to the frame 2. The infant seat 1 is disposed on a cart. The braking mechanism is provided with a triggering component 4 which is linked with the trolley handle 3 and a braking component 5 which is arranged on the frame 2 and can be controlled by the triggering component 4. The trigger assembly 4 has a first position in which it is reset into driving engagement with the wheel in an initial condition and a second position in which it is moved away from the wheel to release the driving engagement under the actuation of the trolley handle 3. When both the trolley handle 3 and the trigger assembly 4 are in an initial state, the trigger assembly 4 is located at a first position, so that the trigger assembly 4 can periodically act on the brake assembly 5 under the driving of rotation of wheels, and correspondingly, the wheels are braked in a spot brake mode. When the trolley handle 3 is controlled by a user to move in an operable manner, the trigger assembly 4 is positioned at the second position to release the transmission fit between the trigger assembly 4 and the wheels, and correspondingly the wheels are not restricted by braking, so that the trolley is driven to move under the pushing of the user.

In the embodiment, the stroller is driven by a hand pushing mode, so that the stroller is simple in structure and convenient to operate, and the use habit of a user is met. When the stroller is not used, the stroller handle 3 and the trigger assembly 4 are in an initial state, and the corresponding trigger assembly 4 is located at a first position, so that the trigger assembly 4 can periodically act on the brake assembly 5 under the driving of rotation of wheels to brake the wheels in a spot brake mode, and therefore when a user does not drive the stroller to move, unconstrained free sliding of the stroller is greatly avoided, a good foolproof protection effect is achieved, and the safety performance is good. When the baby carriage is used, the trolley handle 3 is controlled by a user to move in an operable mode, the corresponding trigger assembly 4 is positioned at the second position, the transmission fit between the trigger assembly 4 and the wheels is relieved, the wheels are not constrained by the braking of the trigger assembly 4 and the braking assembly 5, the movement of the baby carriage is driven under the pushing of the user, the pushing of the baby carriage is realized, the operation of the user on the trolley handle 3 is ensured, the working use or the braking stop of the baby carriage is controlled, the starting and stopping modes of the conventional baby carriage are greatly simplified, and the operation is convenient and safe.

In one embodiment, the trolley handle 3 is arranged on the frame 2 in a lever-like manner. The frame 2 is provided with a supporting point A, the trolley handle 3 is hinged to the supporting point A and is obliquely arranged on the frame 2, one side, close to a user, of the trolley handle 3 is a power arm end, and one side, close to the trigger assembly 4, of the trolley handle 3 is a resistance arm end. Wherein, the cart handle 3 is positioned at one side of the power arm end and is close to the user, thereby being convenient for the user to press or push the cart handle 3 in an operable way. When the trolley is used by a user, the trolley handle 3 body at the power arm end is pressed, so that the trolley handle 3 can perform lever motion by taking the supporting point A as a fulcrum, the trigger assembly 4 is driven to be switched from the first position to the second position in a labor-saving mode, the transmission between the trigger assembly 4 and the wheels is correspondingly relieved, the wheels are not constrained by the brake assembly 5, and the trolley is driven to move by flexible rotation. When the user does not use, the trigger component 4 resets to the initial state to drive the handlebar 3 to return to the position department that does not press, corresponding trigger component 4 moves to the first position, if take place the wheel rotation this moment, trigger component 4 can act on brake component 5, and is periodic non-sustainable trigger brake component 5, realizes the braking mode of some forms of stopping, promotes braking effect and security performance.

Referring to fig. 4 and 9, in one embodiment, the trigger assembly 4 includes a sliding rod 41 disposed at the end of the resistance arm and a cam 42 rotatably disposed on the sliding rod 41. The cam 42 is matched with the brake assembly 5, and the cam 42 can be matched with the brake assembly 5 in a contact way under the driving of the sliding rod 41. Specifically, when the trigger assembly 4 is located at the first position, the cam 42 can be linked with the wheel, and the cam 42 is driven by the wheel to rotate relatively, so that at least part of the outer periphery of the cam 42 can act on the brake assembly 5 during rotation, and further brake the wheel. The sliding rod 41 is elastically disposed on the frame 2, so as to elastically return to the initial state when the cart handle 3 is not driven by a user, and the triggering component 4 is correspondingly located at the first position.

Referring to fig. 2,3 and 6, in a preferred embodiment, the frame 2 includes a front frame 21 and a rear frame 22, and the front frame 21 and the rear frame 22 are abutted to form a V-shaped bracket. Wherein a supporting frame 23 for supporting and disposing the infant seat 1 is transversely arranged between the front frame 21 and the rear frame 22, and the cart handle 3 and the rear frame 22 are approximately V-shaped. So that the front frame 21, the rear frame 22, the support frame 23, and the handle 3 form a smooth frame structure.

In one embodiment, the bottom of the rear frame 22 is assembled with two rear wheels 26 through a relatively transverse shaft 24, and the front frame 21 is correspondingly provided with two front wheels 25 with adjustable spacing, so that the two front wheels 25 are close to or far from each other to form a tricycle or a quadricycle with the rear wheels 26. Through the position adjustment between the front wheels 25, the handcart can be changed between a three-wheel support and a four-wheel support, and is suitable for working in different modes. Wherein, in particular, the front frame 21 and the rear frame 22 are both approximately U-shaped brackets, and the two U-shaped openings are mutually butted, so that the frame 2 is approximately an inverted V-shaped base, wherein the supporting frame 23 is transversely arranged at the U-shaped openings to form an integral frame in a surrounding way, wherein the supporting point A is arranged at the butted area of the front frame 22 and the rear frame 22 near one side of the front frame 21. And the cart handle 3 is hinged at the supporting point A and is arranged on one side of the rear frame 22 in a substantially inclined way, so that a smooth V-shaped structure is formed with the rear frame 22. It should be noted that, the two front wheels 25 are movably sleeved at the U-shaped cross bar of the front frame 21, and can be fastened on the front frame 21 relatively after adjusting the relative position between them, so as to realize stable three-wheel or four-wheel supporting movement.

In one embodiment, the axle 24 is rotatably journaled to the rear frame 22 and the rear wheels 26 are secured to either side of the axle 24. The brake assembly 5 includes a brake pin 51 elastically disposed between the shaft 24 and the rear frame 22, wherein one end of the brake pin 51 is disposed outside the frame to be controlled by the cam 42, and the other end is opposite to the shaft 24 and is capable of driving the end of the brake pin 51 to abut against the shaft 24 when the cam 42 abuts against the brake pin 51, so as to limit the rotation of the shaft 24. When the trigger assembly 4 is located at the first position, the cam 42 is linked with the shaft body 24 through the transmission assembly 6, so that the shaft body 24 can drive the cam 42 to rotate, at this time, at least the outer periphery of the cam 42 at a high position can at least abut against the brake pin 51 to limit the rotation of the shaft body 24, and at least the outer periphery of the cam 42 at a low position can avoid the brake pin 51. Thus, the cam 42 is ensured to be able to periodically press or separate from the brake pin 51 when rotating in association with the rear wheel 26, and the rotating shaft 24 is resistance braked by triggering the brake pin 51 to abut against the shaft 24. It should be noted that the brake pin 51 is disposed at the rear frame 22 by a return spring (not shown) and is spaced from the shaft 24 when not triggered by the cam 42, and is pressed against the shaft 24 when triggered by the cam 42, thereby restricting free rotation of the shaft 24. In other embodiments, the brake pin 51 may be directly linked to the brake disc at the rear wheel 26, so as to directly perform periodic spot braking on the rear wheel 26, which falls within the protection scope of the present disclosure.

In one embodiment, the transmission assembly 6 preferably includes at least a first gear 61 sleeved on the shaft body 24 and a second gear 62 configured on the trigger assembly 4 and capable of meshing with the first gear 61 and the cam 42. Wherein the second gear 62 is rotatably disposed on the trigger assembly 4 side by a bearing (not shown) and is always engaged with the cam 42. The second gear 62 is able to follow the movement of the trigger assembly 4, corresponding to the second gear 62 meshing with the first gear 61 when the trigger assembly 4 is in the first position, and the second gear 62 moving out of the way with the first gear 61 when the trigger assembly 4 is in the second position. Specifically, one end of the sliding rod 41 is disposed at one end of the resistance arm of the handlebar 3, the other end of the sliding rod is guided through the rear frame 22 and is provided with a hollow half-box 42 at the end, the rod body of the sliding rod 41 is sleeved with a compression spring (not shown), one end of the compression spring is disposed on the rod body in an abutting manner, the other end of the compression spring is disposed on the rear frame 22 in an abutting manner, and the compression spring is always in a compressed state, so that the sliding rod 41 is driven by the abutting of the compression spring, and correspondingly, the trigger assembly 4 is reset to an initial state. The cam 42 and the second gear 62 are rotatably disposed in the half-box 42, and can move along with the half-box 42 to avoid the second gear 62 from being in contact with the first gear 61, so as to release the transmission engagement between the axle 24/rear wheel 26 and the second gear 62/cam 42.

It should be noted that, in particular, the two sides of the shaft body 24 are respectively provided with a transmission component 6, a triggering component 4 and a braking component 5 which are mutually in linkage fit. The cart handle 3 is approximately U-shaped, and one side of the opening end of the cart handle 3 is hinged at a supporting point a on the frame 2, so that a user can operate the cart handle 3 to synchronously switch the positions of the two trigger components 4, or synchronously make the trigger components 4 and the opposite limiting components cooperate for braking.

Referring to fig. 9 and 12, in the present embodiment, the support frame 23 is vertically configured with a sleeve 231, and the bottom of the infant seat 1 is disposed in the sleeve 231 in a penetrating manner and can rotate relative to the opening direction of the sleeve 231 to adjust the sitting and lying angle of the infant seat 1. And, a locking member 232 is provided on the nipple 231, and an end of the locking member 232 can be penetrated into the inside along the outside of the nipple 231 to be abutted to the bottom of the infant seat 1. The bottom of the infant seat 1 is correspondingly provided with a pair of spaced apart stops 11 to limit the threshold at which the infant seat 1 rotates within the nipple 231. In particular, the sleeve 231 is a hollow arc tube, the bottom of the infant seat 1 has a sliding shaft 12 slidably sleeved in the arc tube, and the limiting member 11 is generally a fin-shaped block configured at two opposite ends of the sliding shaft 12, so as to limit the rotation angle of the infant seat 1 relative to the sleeve 231, and further ensure the safe adjustment of the infant seat 1. Preferably, the user secures the infant seat 1 to the ferrule 231 and the support frame 23 by the locking member 232 while the infant seat 1 is approximately 170 ° to 175 ° from the horizontal, which is appropriate for the sleeping posture angle of the infant. When the baby sitting posture angle is to be switched, the user can rotate the baby seat 1 to 130-135 degrees with the horizontal plane by releasing the fastening of the locking piece 232, and then the fastening of the baby seat 1 is realized through the locking piece 232, so that the comfort of the baby carriage is greatly improved, and the user can operate and adjust the required angle. The locking member 232 is in a locking manner of fastening by threads, so that a user can conveniently fasten and adjust the locking member.

It should be mentioned that the infant seat 1 is generally in the shape of an arc-shaped shell, which conforms to the sitting and lying posture of an infant and meets the requirements of ergonomics. Wherein the infant seat 1 is provided with a protective fence and leg guard rails to ensure the safety of the infant. And, the main part that is the shallow handle 3 of U type form sets up to the fretwork body of rod that has the radian, improves the discernment degree of product, and does benefit to user's grasp and hand push. In addition, the cart handle 3 is provided with a car light at the front side for illumination.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention.

Claims (2)

1. A stroller, comprising:

A cart including a frame, wheels disposed on the frame, and a cart handle movable relative to the frame;

an infant seat disposed on the cart;

The braking mechanism is provided with a triggering component which is linked with the trolley handle and a braking component which is arranged on the frame and can be controlled by the triggering component;

The trigger assembly has a first position reset to be in driving engagement with the wheel in an initial state and a second position moved away from the wheel under the driving of the push handle bar to release the driving engagement; wherein,

When both the pushing handle and the triggering component are in an initial state, the triggering component is positioned at a first position, so that the triggering component can periodically act on the braking component under the driving of rotation of the wheel, and the wheel is correspondingly braked in a spot braking mode;

When the cart handle is controlled by a user to move in an operable manner, the trigger assembly is positioned at a second position so as to release the transmission fit between the trigger assembly and the wheels, and the wheels are correspondingly not restrained by braking so as to drive the cart to move under the pushing of the user; the frame is provided with a supporting point, the trolley handle is hinged to the supporting point and is obliquely arranged on the frame, one side of the trolley handle, which is close to a user, is a power arm end, and one side of the trolley handle, which is close to the trigger component, is a resistance arm end; the frame comprises a front frame and a rear frame, wherein the front frame and the rear frame are butted to form a V-shaped bracket; the baby seat comprises a front frame, a rear frame, a support frame, a push handle, a rear frame, a front wheel and a rear wheel, wherein the support frame is transversely arranged between the front frame and the rear frame and used for bearing and configuring the baby seat, the push handle and the rear frame are approximately in a V shape, the bottom of the rear frame is provided with two rear wheels in a combined mode through a relatively transversely arranged shaft body, the front frame is correspondingly provided with two front wheels with adjustable intervals, and the two front wheels are close to or far from the corresponding front wheels and form a tricycle or a quadricycle with the rear wheels; the brake assembly comprises a brake pin, a cam, a transmission assembly, a first gear, a second gear, a first gear and a second gear, wherein the brake pin is elastically arranged between a shaft body and a rear frame, one end of the brake pin is arranged outside the frame so as to be controlled by the cam, the other end of the brake pin is opposite to the shaft body and can drive the end of the brake pin to abut against the shaft body when the cam abuts against the brake pin so as to limit the rotation of the shaft body; the second gear is rotatably arranged on one side of the trigger assembly through a bearing and is always meshed with the cam; the second gear can move along with the trigger assembly, the second gear is meshed with the first gear correspondingly when the trigger assembly is located at the first position, the second gear moves to avoid the first gear when the trigger assembly is located at the second position, and transmission assemblies, trigger assemblies and braking assemblies which are in linkage fit with each other are arranged on two sides of the shaft body.

2. The stroller of claim 1, wherein the support frame is vertically configured with a ferrule, the bottom of the infant seat being disposed through the ferrule and rotatable relative to the direction of opening of the ferrule to adjust the sitting and lying angle of the infant seat; and

The ferrule is provided with a locking piece, and the end part of the locking piece can penetrate into the interior along the outer side of the ferrule so as to be abutted to the bottom of the infant seat; the bottom of the infant seat is correspondingly provided with a pair of spacing members arranged at intervals to limit the threshold value of the rotation of the infant seat in the sleeve pipe.