CN116039749A

CN116039749A - Brake device and children's shallow

Info

Publication number: CN116039749A
Application number: CN202111270114.4A
Authority: CN
Inventors: 严思建
Original assignee: Zhongshan Shaoxiawang Plastic Products Co ltd
Current assignee: Zhongshan Shaoxiawang Plastic Products Co ltd
Priority date: 2021-10-28
Filing date: 2021-10-29
Publication date: 2023-05-02
Also published as: CN216468052U

Abstract

The invention discloses a braking device, which comprises a frame component connected to a frame main body, wherein a fork component is connected below the frame component, the fork component comprises a fork rotationally connected to the frame component, wheels are connected to the fork, and a braking component capable of braking the wheels when operated is arranged among the wheels, the fork and the frame component. The invention also provides a child stroller, which comprises a frame main body, wherein the frame main body is provided with a reversing device with two working states, and at least one of two opposite sides of the child stroller in the front-back direction of the frame main body is provided with the brake device. The invention aims to overcome the defects of the prior art and provides a brake device with convenient and stable brake. The invention also provides a child cart with convenient braking and stable braking.

Description

Brake device and children's shallow

[ field of technology ]

The invention relates to a brake device and a child stroller.

[ background Art ]

The prior braking device has the patent number of CN210416705U and the patent notice date of 2020.04.28, and comprises a frame component connected to a frame main body and a fork component connected below the frame component, wherein the fork component comprises a fork, wheels arranged on the fork and a rotating shaft fixedly connected above the fork, the frame component comprises a pipe joint pivotally connected with the rotating shaft, the fork component also comprises a brake disc arranged on the wheels, a brake piece detachably connected with the brake disc and a first connecting component connected with the brake piece and capable of driving the brake piece to act; the frame assembly further comprises a second connecting assembly which is detachably connected with the first connecting assembly and can exert force on the first connecting assembly to enable the first connecting assembly to act; the second connecting component comprises a driving rod which is rotatably arranged on the frame main body and provided with a bending part, a second elastic piece which can enable the driving rod to rotate so as to enable the bending part to move in a direction away from the first connecting component, and a pedal which can enable the driving rod to rotate so as to enable the bending part to move towards the first connecting component, wherein when the brake device is in a braking state, the bending part applies force to the first connecting component; the part of the first connecting assembly, which is directly forced by the bending part, is provided with a pit, and when the brake device is in a braking state, the force application part of the part on the bending part is clamped into the pit. When the brake device is used, the bending part is clamped into the concave pit, and the bending part and the concave pit are worn after being used repeatedly, so that the brake device is unstable in braking.

[ invention ]

The invention aims to overcome the defects of the prior art and provides a brake device with convenient and stable brake.

The invention also provides a child cart with convenient braking and stable braking.

The invention is realized by the following technical scheme:

the first aspect of the present invention provides a brake device, comprising a frame assembly 1 connected to a frame body, a fork assembly 2 is connected below the frame assembly 1, the fork assembly 2 comprises a fork 21 rotatably connected to the frame assembly 1, a wheel 22 is connected to the fork 21, a brake assembly 3 capable of braking the wheel 22 when operated is arranged between the wheel 22, the fork 21 and the frame assembly 1, the brake assembly 3 comprises a locking position 31 arranged on the wheel 22, a locking piece 32 capable of being locked into the locking position 31 to prevent the wheel 22 from rotating is slidably connected to the fork 21, a connecting piece 33 capable of sliding relative to the fork is connected to the frame assembly 1, an abutting surface 331 abutting against the locking piece 32 and enabling the locking piece 32 to abut against and slide when the fork 21 rotates relative to the frame assembly 1 is arranged on the connecting piece 33, a driving piece 34 capable of driving the locking piece 33 capable of sliding relative to the frame assembly 1 when the locking piece 33 moves relative to the frame assembly 1 is connected to the frame assembly 1, and the locking piece 33 is driven to slide relative to the frame assembly 32 when the locking piece 33 is driven to slide relative to the frame assembly 1.

An elastic reset piece 35 capable of driving the latch piece 32 to reset is arranged between the wheel fork 21 and the latch piece 32.

The locking piece 32 comprises a locking piece 321 which is connected to the wheel fork 21 in a sliding way, the locking piece 321 is provided with a locking part 3211 which can be inserted into the locking position 31 when the locking piece 321 moves, and the wheel fork 21 is also provided with a driving piece 322 which is mutually propped against the propping surface 331 and drives the locking piece 321 to slide after being driven by the propping surface 331.

The locking plate 321 is provided with a guide post 3213, the driving plate 322 is provided with a first guide chute 3223 for sliding the guide post 3213, the fork 21 is provided with a second guide chute 211 which is mutually inclined with the first guide chute 3223 and can be used for vertically sliding the guide post 3213, the guide post 3213 sequentially penetrates into the first guide chute 3223 and the second guide chute 211, and when the driving plate 322 slides obliquely relative to the fork 21, the chute wall of the first guide chute 3223 pushes the guide post 3213 to slide in the second guide chute 211 so that the locking plate 321 vertically slides relative to the fork 21; or, the driving plate 322 is provided with a first inclined sliding surface 3222, the locking plate 321 is provided with a second inclined sliding surface 3212 matched with the first inclined sliding surface 3222, and when the driving plate 322 slides obliquely relative to the fork 21, the first inclined sliding surface 3222 pushes the second inclined sliding surface 3212 to enable the locking plate 321 to slide vertically relative to the fork 21.

The upper end of the driving piece 322 is provided with a protruding part 3221 which extends transversely, the wheel fork 21 is also connected with a sliding block 4 which can slide relatively to the wheel fork, the protruding part 3221 on the driving piece 322 transversely penetrates through the sliding block 4 and is fixedly connected with the sliding block 4, the protruding part 3221 protrudes out of the sliding block 4 to be mutually propped against the propping surface 331 of the connecting piece 33, and a guiding component 5 which can guide the sliding block 4 to slide is further arranged between the sliding block 4 and the wheel fork 21.

The frame assembly 1 comprises a connecting rod 11 capable of being connected to a frame main body, a mounting seat 12 is connected to the lower end of the connecting rod 11, the mounting seat 12 is rotationally connected with a wheel fork 21, and a connecting piece 33 is slidably connected in the mounting seat 12.

The mounting seat 12 is connected with a support rod 13 extending transversely, the driving piece 34 comprises an operation part 341 rotatably connected to the support rod 13, a pull rope 342 capable of pulling the connection piece 33 to slide relative to the mounting seat 12 when the operation part 341 rotates relative to the support rod 13 is arranged between the operation part 341 and the connection piece 33, and an elastic piece 343 capable of driving the connection piece 33 to reset is arranged between the mounting seat 12 and the abutting surface 331 of the connection piece 33.

The operation part 341 comprises a movable sleeve 3411 movably connected to the support rod 13, the movable sleeve 3411 is provided with a clamping part 34111, the support rod 13 is also rotatably connected with a pedal 3412, the pedal 3412 is provided with a bayonet 34121 capable of accommodating the clamping part 34111, an elastic part 3413 capable of enabling the clamping part 34111 to keep a clamping state is further arranged between the movable sleeve 3411 and the support rod 13, the guy rope 342 is connected to the movable sleeve 3411, the clamping part 34111 is provided with a third inclined sliding surface 34112, and the pedal 3412 is provided with a fourth inclined sliding surface 34122 which is matched with the third inclined sliding surface 34112 and drives the movable sleeve 3411 to transversely slide in the process of rotating the pedal 3412 relative to the support rod 13.

The fork 21 is provided with an inclined chute 212 for sliding the driving plate 322 and a straight chute 213 for sliding the locking plate 321, the elastic resetting piece 35 is arranged between the top surface of the driving plate 322 and the fork 21, and the fork 21 is also provided with a third guiding chute 214 for guiding the locking part 3211 to slide.

In another aspect, the present invention provides a stroller comprising a frame body, wherein the frame body is provided with a reversing device having two working states, at least one of two opposite sides of the frame body in a front-rear direction is provided with the braking device, when the reversing device is in a first state, the mutual rotation relationship between the wheel 22 and the fork 21 on one side is limited to move directionally, the mutual rotation relationship between the wheel 22 and the fork 21 on the other side is released to move universally relative to the frame assembly 1, and when the reversing device is in a second state, the mutual rotation relationship between the wheel 22 and the fork 21 on the other side is released to move universally relative to the frame assembly 1, and the mutual rotation relationship between the wheel 22 and the fork 21 on the other side is limited to move directionally.

Compared with the prior art, the invention has the following advantages: when the wheel fork is in sliding relative to the frame assembly, the locking piece can be clamped into the locking position on the wheel, at the moment, the wheel and the wheel fork are in a locked state, the wheel and the wheel fork stop rotating, the frame assembly and the frame main body of the braking device are used for stopping the vehicle, the vehicle can be driven by the driving piece to stop the vehicle no matter the wheel fork and the wheel are in a universal moving state or an oriented moving state, the operation is convenient, and the abutting surface on the locking piece and the connecting piece mutually abuts against each other when the wheel fork is used, even if the locking piece slides against the abutting surface when the wheel fork rotates relative to the frame assembly, the locking piece and the abutting surface are not separated, the locking piece and the abutting surface can be pulled up easily, the braking is not influenced even if the locking piece and the abutting surface appear, and the braking is more stable.

[ description of the drawings ]

FIG. 1 is one of the perspective views of the brake apparatus of the present invention;

FIG. 2 is a second perspective view of the brake device of the present invention;

FIG. 3 is an exploded view of one of the wheels, fork and brake assembly of the brake apparatus of the present invention;

FIG. 4 is a second exploded view of the wheel, fork and brake assembly of the brake apparatus of the present invention;

FIG. 5 is a cross-sectional view of one of the wheels, fork and brake assembly of the brake apparatus of the present invention;

FIG. 6 is a second cross-sectional view of the wheel, fork and brake assembly of the brake apparatus of the present invention;

FIG. 7 is a third exploded view of the wheel, fork and brake assembly of the brake apparatus of the present invention;

FIG. 8 is a perspective view of a guide assembly of the brake apparatus of the present invention;

fig. 9 is an exploded view of the support rod, the stay, and the operating part of the brake device according to the present invention.

[ detailed description ] of the invention

The invention is further described below with reference to the accompanying drawings:

as shown in fig. 1 to 9, the present invention provides a brake device, comprising a frame component 1 connected to a frame body, a fork component 2 is connected below the frame component 1, the fork component 2 comprises a fork 21 rotatably connected to the frame component 1, the fork 21 is connected with a wheel 22, a brake component 3 capable of braking the wheel 22 when operated is arranged between the wheel 22, the fork 21 and the frame component 1, the brake component 3 comprises a locking position 31 arranged on the wheel 22, the fork 21 is slidably connected with a locking piece 32 capable of being locked into the locking position 31 to prevent the wheel 22 from rotating, the frame component 1 is connected with a connecting piece 33 capable of sliding relative to the fork, the connecting piece 33 is provided with an abutting surface 331 which abuts against the locking piece 32 and can enable the locking piece 32 to slide when the fork 21 rotates relative to the frame component 1, the frame component 1 is also connected with a driving surface 331 capable of driving the locking piece 33 to slide relative to the frame component 1 when the locking piece 33 is driven to slide relative to the frame component 1, and the locking piece 33 is driven to slide relative to the frame component 32.

When the wheel fork 32 is in sliding relative to the frame assembly 1, the locking piece 32 can be clamped into the locking position 31 on the wheel 22, the wheel 22 and the wheel fork 21 are in a locked state, the wheel 22 stops rotating relative to the wheel fork 21, the frame assembly 1 and the frame main body using the brake device can park through the driving of the driving piece 34 no matter the wheel fork 21 and the wheel 22 are in a universal moving state or an oriented moving state, the operation is convenient, the locking piece 32 is in mutual abutting with the abutting surface 331 on the connecting piece 33 when the connecting piece 33 slides relative to the wheel fork 21, and even if the locking piece 32 slides against the abutting surface 331 when the wheel fork 21 rotates relative to the frame assembly 1, the locking piece 32 and the abutting surface 331 are not easily influenced by abrasion, and the abrasion of the locking piece 32 and the abutting surface 331 can not be easily influenced even if the locking piece 32 and the abutting surface 331 are not easily pulled and the brake 32 are not influenced.

As shown in fig. 3, an elastic reset member 35 capable of driving the latch member 32 to reset is provided between the fork 21 and the latch member 32. When the driving member 34 is not subjected to external force, the elastic reset member 35 can drive the locking member 32 to slide downwards relative to the fork 21 for reset, and the locking member 32 can drive the connecting member 33 to move downwards for reset when sliding downwards.

As shown in fig. 3, 4 and 7, the latch 32 includes a latch plate 321 slidably connected to the fork 21, the latch plate 321 is provided with a locking portion 3211 capable of being inserted into the locking position 31 when the latch plate 321 moves, and the fork 21 is further provided with a driving plate 322 that abuts against the abutment surface 331 and drives the latch plate 321 to slide after being driven by the abutment surface 331. When braking is needed, an external force is applied to the driving piece 34, the driving piece 34 can move relative to the frame assembly 1, in the process of moving the driving piece 34, the driving piece 34 drives the connecting piece 33 to slide relative to the frame assembly 1, in the process of sliding the connecting piece 33 relative to the frame assembly 1, the abutting surface 331 on the connecting piece 33 drives the driving piece 322 to move relative to the fork 21, the locking piece 321 slides relative to the fork 21 under the driving of the driving piece 322 when the driving piece 322 slides relative to the fork 21, the locking part 3211 on the locking piece 321 is clamped into the locking position 31 on the wheel 22 when following the action of the locking piece 321, at the moment, the wheel 22 cannot rotate relative to the fork 21, the fork assembly 2 is in a locking state, and the child cart with the braking device is used for braking. When a person brakes, only external force is applied to the driving piece 34, so that the driving piece 34 can move relative to the frame assembly 1, and the operation is convenient. The locking position 31 is a circular arc clamping groove, and the locking part 3211 is a cylinder which is matched with the circular arc clamping groove in shape, so that the locking position is convenient to clamp into the clamping groove.

As shown in fig. 4 and 7, the locking plate 321 is provided with a guide post 3213, the driving plate 322 is provided with a first guide chute 3223 capable of sliding the guide post 3213 laterally, the fork 21 is provided with a second guide chute 211 which is inclined with the first guide chute 3223 and capable of sliding the guide post 3213 vertically, the guide post 3213 sequentially penetrates into the first guide chute 3223 and the second guide chute 211, and when the driving plate 322 slides obliquely relative to the fork 21, the groove wall of the first guide chute 3223 pushes the guide post 3213 to slide in the second guide chute 211 so that the locking plate 321 slides vertically relative to the fork 21. When the driving plate 322 slides obliquely upward relative to the fork 21, the groove wall of the first guide chute 3223 on the driving plate 322 pushes the guide post 3213 to slide upward in the second guide chute 211, so that the locking piece 321 slides upward, and therefore, the locking portion 3211 on the locking piece 321 can be locked into the locking position 31 on the wheel 22 in the vertical direction. Of course, another driving structure may be adopted for driving the locking plate 321 by the driving plate 322, for example, a first inclined sliding surface 3222 is provided on the driving plate 322, a second inclined sliding surface 3212 matching with the first inclined sliding surface 3222 is provided on the locking plate 321, and when the driving plate 322 slides, the first inclined sliding surface 3222 can push the second inclined sliding surface 3212, so that the locking plate 321 slides upwards, and further the locking portion 3211 is locked with the locking position 31. In this embodiment, the driving plate 322 drives the locking plate 321 by combining the two driving structures, so that the locking plate 321 slides more smoothly and stably.

As shown in fig. 8, the upper end of the driving plate 322 is provided with a protruding portion 3221 extending transversely, the fork 21 is further connected with a sliding block 4 capable of sliding relative to the protruding portion 3221 on the driving plate 322 transversely penetrates through the sliding block 4 and is fixedly connected with the sliding block 4, the protruding portion 3221 protrudes out of the sliding block 4 to abut against the abutting surface 331 of the connecting piece 33, and a guiding component 5 capable of guiding the sliding block 4 to slide is further arranged between the sliding block 4 and the fork 21. The slider 4 is fixedly connected with the bulge 3221, after the bulge 3221 is pushed by the abutting surface 331, the slider 4 slides relative to the wheel fork 21 through the guide assembly 5, so that the situation that the bulge 3221 is laterally turned over to cause unsmooth clamping can be avoided, the braking device is more stable during braking, and the safety of the child cart is ensured. The guide assembly 5 is a guide slide block and a guide chute arranged on the slide block 4 and the wheel fork 21. The bottom surface of the projection 3221 is always in an abutting state with the abutting surface 331 of the connector 33.

As shown in fig. 1, the frame assembly 1 includes a connecting rod 11 capable of being connected to a frame body, a mounting seat 12 is connected to a lower end of the connecting rod 11, the mounting seat 12 is rotatably connected to a fork 21, and a connecting member 33 is slidably connected to the mounting seat 12. The mounting seat 12 is fixedly connected with a mounting sleeve 121, the mounting sleeve 121 is externally connected with a rotating bearing 122, the fork 21 is provided with a containing groove 215 capable of containing the rotating bearing 122, and the inner wall of the containing groove 215 is connected with an outer ring on the rotating bearing 122. The inner ring of the rotary bearing 122 is fitted over the outer side of the mounting sleeve 121, and the outer ring of the rotary bearing 122 is connected to the inner wall of the receiving groove, so that the fork 21 can rotate relative to the mounting sleeve 121 following the outer ring of the rotary bearing 122. The connecting piece 33 is connected with a shaft pin 332 transversely penetrating through the mounting sleeve 121, the mounting sleeve 121 is provided with a strip-shaped hole 1211 for guiding the shaft pin 332 to move inside, and the fit of the shaft pin 332 and the strip-shaped hole 1211 is used for limiting the moving range of the connecting piece 33 and preventing the connecting piece 33 from being separated from the mounting sleeve 121.

As shown in fig. 6, the mounting base 12 is connected with a supporting rod 13 extending transversely, the driving member 34 includes an operating portion 341 rotatably connected to the supporting rod 13, a cable 342 capable of pulling the connecting member 33 to slide relative to the mounting base 12 when the operating portion 341 rotates relative to the supporting rod 13 is disposed between the operating portion 341 and the connecting member 33, and an elastic member 343 capable of driving the connecting member 33 to return is disposed between the mounting base 12 and the abutting surface 331 of the connecting member 33. The elastic member 343 is a spring for driving the connecting member 33 to return when the operation portion 341 is not subjected to an external force. When the operation part 341 is stepped on when braking is needed, the operation part 341 rotates relative to the support rod 13 and pulls the pull rope 342 to move, the pull rope 342 pulls the connecting piece 33 to slide upwards relative to the mounting seat 12 in the moving process, and the abutting surface 331 of the connecting piece 33 and the locking piece 32 abut against each other, so that the locking piece 32 can move upwards along with the connecting piece 33 and be clamped into the locking position 31 on the wheel 22 in the moving process of the connecting piece 33.

As shown in fig. 6, the operation portion 341 includes a movable sleeve 3411 movably connected to the support rod 13, the movable sleeve 3411 is provided with a clamping portion 34111, the support rod 13 is further rotatably connected with a pedal 3412, the pedal 3412 is provided with a bayonet 34121 capable of accommodating the clamping portion 34111, an elastic member 3413 capable of maintaining the clamping portion 34111 in a clamping state is further provided between the movable sleeve 3411 and the support rod 13, the cable 342 is connected to the movable sleeve 3411, the clamping portion 34111 is provided with a third inclined sliding surface 34112, and the pedal 3412 is provided with a fourth inclined sliding surface 34122 which is matched with the third inclined sliding surface 34112 and drives the movable sleeve 3411 to slide transversely in the process of rotating the pedal 3412 relative to the support rod 13. The operation portion 341 has at least two states, one being an initial state and one being a rotational state. When the operation portion 341 is in the initial state, the engagement portion 34111 of the movable sleeve 3411 is engaged with the bayonet 34121 of the pedal 3412. When the operating portion 341 moves from the initial state to the rotating state, the pedal 3412 is rotated relative to the supporting rod 13 by the external force, and the fourth inclined sliding surface 34122 on the pedal 3412 cooperates with the third inclined sliding surface 34112 on the clamping portion 34111 during the rotation of the pedal 3412, so that the movable sleeve 3411 slides laterally relative to the supporting rod 13, and the cable 342 moves along with the movable sleeve 3411 and pulls the connecting member 33 to slide vertically relative to the mounting seat 12.

As shown in fig. 4, the fork 21 is provided with an inclined chute 212 for sliding the driving plate 322 and a straight chute 213 for sliding the locking plate 321, the elastic restoring member 35 is disposed between the top surface of the driving plate 322 and the fork 21, and the fork 21 is further provided with a third guiding chute 214 for guiding the locking portion 3211 to slide. The inclined chute 212 is used for guiding the sliding direction of the driving piece 322 relative to the fork 21, the straight chute 213 is used for guiding the sliding direction of the locking piece 321 relative to the fork 21, and the third guiding chute 214 is used for guiding the sliding direction of the locking portion 3211 and limiting the sliding range of the locking portion 3211 relative to the fork 21.

Another advantage of the present invention is that a stroller is provided that includes a frame body having a reversing device with two operating states, wherein the stroller is provided with a brake device as described above on at least one of two opposite sides of the frame body in a front-to-rear direction, and wherein when the reversing device is in a first state, the relative rotational relationship between the wheel 22 and the fork 21 on one side is restricted to move in a directional manner, and the relative rotational relationship between the wheel 22 and the fork 21 on the other side is released to move in a universal manner relative to the frame assembly 1, and when the reversing device is in a second state, the relative rotational relationship between the wheel 22 and the fork 21 on the other side is released to move in a universal manner relative to the frame assembly 1, and the relative rotational relationship between the wheel 22 and the fork 21 on the other side is restricted to move in a directional manner. The brake device in this embodiment may be provided at the front wheel, or may be provided at the rear wheel, or both the front wheel and the rear wheel. The steering device is used for controlling the front wheel and the rear wheel from universal direction to directional direction or from directional direction to universal direction. The reversing device is of a traditional hand push rod reversing structure, for example, a locating hole is formed in a wheel fork, a locating pin capable of sliding is arranged in a mounting seat, when the locating pin is matched with the locating hole, the wheel fork cannot rotate relative to a frame assembly, at the moment, the wheel can rotate relative to the wheel fork to directionally move, when the locating pin is separated from the locating hole, the wheel fork can rotate circumferentially relative to the frame assembly in the horizontal plane direction, and at the moment, the wheel can realize universal movement. When the hand push rod of the child trolley is positioned above the rear wheel, a child sitting in the child trolley faces forwards, a adult is positioned on one side of the rear wheel, at the moment, the front wheel of the child trolley is released, the front wheel can freely rotate, and the rear wheel can only move directionally. When the hand push rod is switched to the front wheel, children sitting in the children cart face to adults, the adults are positioned on one side of the front wheel, the front wheel is locked at the moment, the front wheel can only move directionally, the rear wheel is released, and the rear wheel can move universally.

Claims

1. A brake apparatus, characterized in that: comprises a frame component (1) connected to a frame main body, a wheel fork component (2) is connected below the frame component (1), the wheel fork component (2) comprises a wheel fork (21) rotationally connected to the frame component (1), the wheel fork (21) is connected with a wheel (22), a brake component (3) capable of braking the wheel (22) when operated is arranged between the wheel (22), the wheel fork (21) and the frame component (1), the brake component (3) comprises a locking position (31) arranged on the wheel (22), the wheel fork (21) is connected with a locking piece (32) which can be blocked into the locking position (31) to prevent the wheel (22) from rotating, the frame component (1) is connected with a connecting piece (33) which can be driven by the wheel fork, the connecting piece (33) is provided with a locking piece (33) which is mutually abutted against and can drive a locking piece (32) against a movable frame component (1) when the wheel fork (21) is rotated against the frame component (1) to drive a locking piece (32) against a locking piece (331) which can drive the frame component (1) to slide against the frame component (1), when the connecting piece (33) is driven to slide relative to the frame assembly (1), the abutting surface (331) drives the locking piece (32) to slide, so that the locking piece (32) is locked into the locking position (31).

2. A brake apparatus according to claim 1, wherein: an elastic reset piece (35) capable of driving the locking piece (32) to reset is arranged between the wheel fork (21) and the locking piece (32).

3. A brake apparatus according to claim 2, wherein: the locking piece (32) comprises a locking piece (321) which is connected to the wheel fork (21) in a sliding mode, a locking portion (3211) which can be inserted into the locking position (31) when the locking piece (321) is moved is arranged on the locking piece (321), and a driving piece (322) which is propped against the propping surface (331) and drives the locking piece (321) to slide after being driven by the propping surface (331) is arranged on the wheel fork (21).

4. A brake arrangement according to claim 3, wherein: the locking piece (321) is provided with a guide post (3213), the driving piece (322) is provided with a first guide chute (3223) which can enable the guide post (3213) to slide, the fork (21) is provided with a second guide chute (211) which is mutually inclined with the first guide chute (3223) and can enable the guide post (3213) to vertically slide, the guide post (3213) is sequentially arranged in the first guide chute (3223) and the second guide chute (211) in a penetrating way, and when the driving piece (322) slides obliquely relative to the fork (21), the chute wall of the first guide chute (3223) pushes the guide post (3213) to slide in the second guide chute (211) so that the locking piece (321) slides vertically relative to the fork (21); or, the driving piece 322 is provided with a first inclined sliding surface (3222), the locking piece (321) is provided with a second inclined sliding surface (3212) matched with the first inclined sliding surface (3222), and when the driving piece (322) slides obliquely relative to the fork (21), the first inclined sliding surface (3222) pushes the second inclined sliding surface (3212) to enable the locking piece (321) to slide vertically relative to the fork (21).

5. The brake apparatus of claim 4, wherein: the upper end of the driving piece (322) is provided with a protruding part (3221) which transversely extends, the wheel fork (21) is also connected with a sliding block (4) which can slide relative to the wheel fork, the protruding part (3221) on the driving piece (322) transversely penetrates through the sliding block (4) and is fixedly connected with the sliding block (4), and the protruding part (3221) protrudes out of the sliding block (4) to be in contact with the sliding block (4).

6. A brake apparatus according to claim 1, wherein: the frame assembly (1) comprises a connecting rod (11) capable of being connected to a frame main body, a mounting seat (12) is connected to the lower end of the connecting rod (11), the mounting seat (12) is rotationally connected with a fork (21), and a connecting piece (33) is slidably connected in the mounting seat (12).

7. The brake apparatus of claim 6, wherein: the mounting seat (12) on be connected with transversely extending bracing piece (13), driving piece (34) including rotating operation portion (341) of being connected on bracing piece (13), operation portion (341) and connecting piece (33) between be equipped with can pulling connecting piece (33) gliding cable (342) relative mount seat (12) when operation portion (341) rotate relative bracing piece (13), mount pad (12) and connecting piece (33) support and be equipped with between face (331) that supports that can order about connecting piece (33) to reset elastic component (343).

8. The brake apparatus of claim 7, wherein: the operation part (341) comprises a movable sleeve (3411) movably connected to the supporting rod (13), the movable sleeve (3411) is provided with a clamping part (34111), the supporting rod (13) is further rotationally connected with a pedal plate (3412), the pedal plate (3412) is provided with a bayonet (34121) capable of accommodating the clamping part (34111), an elastic part (3413) capable of enabling the clamping part (34111) to keep a clamping state is further arranged between the movable sleeve (3411) and the supporting rod (13), a guy cable (342) is connected to the movable sleeve (3411), the clamping part (34111) is provided with a third inclined sliding surface (34112), and the pedal plate (3412) is provided with a fourth inclined sliding surface (34122) which is matched with the third inclined sliding surface (34112) and drives the movable sleeve (3411) to transversely slide in the process of rotating relative to the supporting rod (3412).

9. The brake apparatus of claim 4, wherein: the wheel fork (21) is provided with an inclined chute (212) which can be used for sliding the driving piece (322) and a straight chute (213) which can be used for sliding the locking piece (321), the elastic resetting piece (35) is arranged between the top surface of the driving piece (322) and the wheel fork (21), and the wheel fork (21) is also provided with a third guide chute (214) which is used for guiding the locking part (3211) to slide.

10. The utility model provides a children's shallow, includes the frame main part, the frame main part on be equipped with the switching-over device that has two kinds of operating condition, its characterized in that: the stroller is provided with a brake device according to any one of claims 1 to 9 on at least one of the opposite sides of the frame body in the front-rear direction, and when the reversing device is in the first state, the relative rotational relationship between the wheel (22) and the fork (21) on one side is restricted to move in a direction, and the relative rotational relationship between the wheel (22) and the fork (21) on the other side is released to move in a direction which is universal with respect to the frame assembly (1), and when the reversing device is in the second state, the relative rotational relationship between the wheel (22) and the fork (21) on the other side is released to move in a direction which is universal with respect to the frame assembly (1).