Wheel set brake mechanism and baby carriage

Abstract

The wheel set brake mechanism comprises a driving piece and a brake assembly, the brake assembly comprises a driving pin, a traction piece, a pushing piece, a pushing piece and a locking piece, the driving pin is connected with one end of the traction piece, the other end of the traction piece is connected with the pushing piece, and the pushing piece is movably arranged in a wheel seat of the baby carriage; the pushing part is movably arranged in the pushing part and connected with the locking part, the driving part drives the driving pin of the brake assembly to move, the pushing part is driven to move through the traction part, and then the pushing part drives the locking part to move so as to lock or unlock the wheels. The one-step double-brake function can be achieved, the structure is simple, and operation is convenient.

Description

[0001] This application is a divisional application of Chinese patent application 202111230214.4, filed on October 21, 2021, entitled "Wheel Braking Mechanism and Baby Stroller". Technical Field

[0002] This invention relates to a stroller, and more particularly to a wheel brake mechanism and a stroller having the mechanism. Background Technology

[0003] Existing strollers generally have a braking mechanism. When the stroller stops, simply pressing the brake pedal locks the wheels, preventing movement and accidents, thus improving safety. However, existing stroller braking mechanisms generally come in two types: one locks a single wheel, requiring two separate brakes for each rear wheel; the other locks both wheels simultaneously. Both types suffer from complex structures and inconvenient operation. Furthermore, existing strollers typically have swivel wheels at the front but not at the rear, making them inconvenient and less flexible for certain maneuvers, such as lateral movement. Some strollers with swivel wheels at both the front and rear lack a directional mechanism for the rear wheels, allowing them to easily rotate during forward movement, further hindering the stroller's movement. Therefore, these strollers all present inconveniences in use. Summary of the Invention

[0004] The purpose of this invention is to provide a wheel brake mechanism that achieves dual braking with a single pedal press, has a simple structure, and is easy to operate.

[0005] Another objective of this invention is to provide a baby stroller that is simple in structure and easy to operate.

[0006] To achieve the above objectives, the present invention provides a wheel brake mechanism suitable for locking the wheels of a stroller, comprising a drive member and a brake assembly. The brake assembly includes a drive pin, a traction member, a pusher member, a pusher member, and a locking member. The drive pin is connected to one end of the traction member, and the other end of the traction member is connected to the pusher member. The pusher member is movably disposed within the wheel seat of the stroller. The pusher member is movably disposed within the pusher member and is connected to the locking member. The drive member drives the drive pin of the brake assembly to move, thereby driving the pusher member to move via the traction member. The pusher member drives the pusher member to move, and the pusher member drives the locking member to move, thereby locking or unlocking the wheel.

[0007] Compared with the prior art, this invention uses a driving component to drive a driving pin to move, which in turn drives a traction component. The traction component is flexible and can extend to the wheel to pull the pushing component. The pushing component then drives a pusher and a locking component located near the wheel, so that the locking component can lock the wheel. Therefore, the user only needs to step on the driving component to lock the wheel, which can achieve the function of one step for two brakes. The structure is simple and the operation is convenient.

[0008] Preferably, there are two brake assemblies, and the drive member simultaneously drives the drive pins of both brake assemblies to move.

[0009] Preferably, the pushing member is provided with an inclined groove, and the jacking member is provided with a movable pin, which is movably inserted into the inclined groove so that the jacking member moves closer to or away from the axle of the wheel.

[0010] Specifically, the locking part is fitted inside the pushing part, and when the pushing part drives the pushing part to move, the locking part moves closer to or further away from the wheel axle along with the pushing part.

[0011] Specifically, the locking member and the pushing member are movably connected, and a reset member is provided between the locking member and the pushing member. The locking member has a T-shaped structure and has a vertical axis and a horizontal axis. The vertical axis is movably sleeved with the pushing member, and the horizontal axis extends out of the pushing member. One end of the reset member abuts against the end of the vertical axis, and the other end abuts against the inner bottom of the pushing member.

[0012] Preferably, the driving component has a pair of symmetrical driving grooves, and a driving shaft is provided on the outer side of the driving pin perpendicular to its own central axis. The driving shaft is movably inserted into the driving groove so that when the driving component rotates, it drives the driving pin to move through the driving groove. By setting the driving groove, the driving groove can convert the torque of the driving component's rotation into an axial tension force on the driving pin, thereby causing the driving pin to stretch the traction component, which in turn stretches the pushing component, causing the pushing component to drive the pushing component and the locking component, thus achieving the purpose of driving the locking component to move.

[0013] Preferably, it also includes an elastic element disposed between the two drive pins. The elastic element can provide a resilient force to reset the two drive pins, enabling the drive pins to perform repetitive actions.

[0014] Preferably, the traction member includes a first traction member and a second traction member, one end of the first traction member is connected to a drive pin, the other end of the first traction member is rotatably connected to one end of the second traction member, and the other end of the second traction member is connected to a pusher.

[0015] Specifically, the first traction member has a connector, the second traction member has a pivot joint, and a receiving portion is provided between the first and second traction members. The connector is disposed within the receiving portion, and the pivot joint is rotatably disposed within the receiving portion, so that the first and second traction members can be connected. Through the cooperation of the receiving portion and the pivot joint, and because the pivot joint can rotate freely within the receiving portion, the connection of the first and second traction members can prevent the first traction member from twisting due to the rotation of the wheel, thus avoiding affecting the operation of the drive pin and drive components.

[0016] Specifically, the pusher has a receiving protrusion, and the second traction member has a pivot joint, which is disposed within the receiving protrusion to connect the pusher and the second traction member. Through the cooperation of the receiving protrusion and the pivot joint, since the pivot joint can rotate freely within the receiving protrusion, the connection between the second traction member and the pusher can prevent the second traction member from twisting due to the rotation of the wheel.

[0017] Specifically, when the locking member and the pusher move closer to the axle of the rear wheel, the locking member retracts into the pusher, and the reset member is squeezed; when the locking member and the pusher move away from the axle of the rear wheel, the reset member extends under its own elastic force, causing the locking member to extend.

[0018] Specifically, the pivot joint is a spherical head.

[0019] Preferably, the wheel brake mechanism also includes a rear leg tube, which is mounted on the stroller frame, and the wheel seat is rotatably fitted onto the rear leg tube, with a housing located inside the rear leg tube.

[0020] Specifically, the wheel assembly braking mechanism also includes a first sleeve and a second sleeve. The first sleeve is fixed inside the rear foot tube, and the second sleeve is built inside the rear foot tube and rotatably connected to the first sleeve. The first sleeve and the second sleeve form an internal space through which the first traction member and the second traction member can pass, and the accommodating part is located inside the internal space.

[0021] Preferably, the wheel brake mechanism also includes a resilient reset element that provides a resilient force to reset the pusher element.

[0022] Preferably, the wheel hub has engagement holes distributed around the wheel's rolling axis, with the openings of the engagement holes facing outwards. A locking element enters the engagement hole from the opening to lock the wheel or exits the engagement hole to release the wheel.

[0023] Preferably, the drive unit has a sleeve-like structure and is rotatably fitted onto the crossbar of the stroller frame, with the drive unit extending into a foot pedal for stepping.

[0024] A locking assembly is provided between the drive unit and the frame to lock or unlock the drive unit.

[0025] Specifically, the locking assembly includes a locking pin on the drive member and two locking recesses on the frame. When the drive member rotates to the position where the wheel is locked, the locking pin engages with one of the locking recesses to position the drive member. When the drive member rotates to the position where the wheel is unlocked, the locking pin engages with the other locking recess to position the drive member. By setting the locking pin to engage with the locking recesses, the drive member can keep the wheel locked without requiring the user to apply force to the drive member, improving ease of use. When unlocking, it can also ensure the stability of the drive member and prevent accidental rotation of the drive member that could cause the wheel to lock accidentally.

[0026] Specifically, the locking pin is movably disposed on the drive member, and the locking assembly also includes a compression spring disposed between the locking pin and the drive member to drive the locking pin to extend.

[0027] Specifically, a guide groove is provided on one side of the drive member. The guide groove is located between two locking recesses. When the drive member rotates and releases the wheel, the locking pin slides along the guide groove to the other locking recess. When the drive member rotates and locks the wheel, the locking pin slides along the guide groove to one of the locking recesses.

[0028] Specifically, the stroller has a wheel seat, and the direction of movement of the pusher within the wheel seat is perpendicular to the direction of movement of the pusher.

[0029] A stroller includes a frame and a pair of omnidirectionally rotatable front wheels, and also includes a pair of rear wheels and a wheel brake mechanism, which is mounted on the frame and can lock both rear wheels simultaneously to prevent the rear wheels from rolling.

[0030] Preferably, the stroller also includes a wheel alignment mechanism, with the rear wheels pivotally connected to the stroller's wheel seats. The wheel seats are omnidirectionally mounted on the frame. The wheel alignment mechanism simultaneously limits the rotation of both wheel seats to prevent the rear wheels from rotating omnidirectionally, or simultaneously releases the limits to allow the wheel seats to rotate omnidirectionally. By allowing the wheel seats to rotate omnidirectionally relative to the frame, the stroller can move laterally, possessing a drifting ability. Simultaneously, by using the wheel alignment mechanism to lock or unlock the wheel seats, this drifting or non-drifting function can be switched at any time, greatly improving ease of use and flexibility.

[0031] Specifically, the wheel set orientation mechanism includes an operating part, a third traction member, a positioning pin, and a return spring. The operating part is connected to one end of the third traction member, and the other end of the third traction member is connected to the positioning pin. The return spring provides an elastic force to reset the positioning pin. The positioning pin can be inserted into the wheel seat to position the rear wheel or removed from the wheel seat to release the rear wheel.

[0032] Specifically, the operating part is movably mounted on the stroller frame, and the operating part is symmetrically provided with two inclined slides. The end of the third traction member is provided with a moving head, which is movably mounted on the stroller frame and movably inserted into the inclined slide.

[0033] Specifically, a bearing is installed between the frame and the wheel well. By installing the bearing, the rotation between the frame and the wheel well can be made more stable and smooth, ensuring that the wheel well can rotate in all directions.

[0034] Specifically, the frame has a rear leg tube, the wheel hub has a pivot sleeve that is pivotally connected to the rear leg tube, and the bearing is located between the pivot sleeve and the rear leg tube.

[0035] Specifically, the circumferentially toothed structure of the wall surface in contact with the bearing outer wall of the pivot sleeve. By adding the toothed structure, the deformation of the pivot sleeve can be increased, thereby preventing the pivot sleeve from cracking and extending its service life.

[0036] A stroller includes: a frame; wheels connected to the frame; and a wheel braking mechanism including: a drive member rotatably connected to the frame; a brake assembly connected to the drive member; and a locking assembly disposed between the drive member and the frame. The locking assembly includes a locking pin disposed on the drive member, a guide groove, and two locking recesses disposed on the frame. The locking pin is movably disposed on the drive member, and the guide groove is disposed between the two locking recesses. When the drive member rotates and drives the brake assembly to lock the wheels, the locking pin slides along the guide groove toward one of the locking recesses to position the drive member. When the drive member rotates and drives the wheels to release, the locking pin slides along the guide groove toward the other locking recess to position the drive member. Attached Figure Description

[0037] Figure 1 This is a perspective view of the front of the stroller of the present invention.

[0038] Figure 2 This is a three-dimensional view of the rear side of the stroller of the present invention.

[0039] Figure 3 This is a perspective view of the rear wheel and wheel assembly braking mechanism of the stroller of the present invention.

[0040] Figure 4 This is a structural diagram of the rear wheel and wheel assembly braking mechanism of the stroller of the present invention.

[0041] Figure 5 This is a cross-sectional view of the rear wheel and wheel assembly braking mechanism of the stroller of the present invention.

[0042] Figure 6 This is a side sectional view of the rear wheel, wheel assembly braking mechanism, and wheel assembly orientation mechanism of the stroller of the present invention.

[0043] Figure 7 This is a diagram showing the internal structure of the rear leg tube of the stroller of the present invention.

[0044] Figure 8 This is a structural diagram of the pusher, pusher, and locking components of the stroller of the present invention.

[0045] Figure 9 This is a structural diagram of the rear wheel and wheel assembly braking mechanism of the stroller of the present invention without the drive component.

[0046] Figure 10 This is a structural diagram of the upper half of the drive component of the wheel brake mechanism of the stroller of the present invention.

[0047] Figure 11 This is a state diagram of the locking component 410 of the stroller of the present invention after the pedal is pressed.

[0048] Figure 12 This is a state diagram of the locking assembly 410 of the baby stroller after the foot pedal is lifted according to the present invention.

[0049] Figure 13 This is a diagram showing the state of the wheel brake mechanism of the stroller of the present invention when the rear wheels are released.

[0050] Figure 14 This is a diagram showing the state of the wheel brake mechanism of the stroller of the present invention when the rear wheels are locked.

[0051] Figure 15 This is a perspective view of the wheel brake mechanism of the stroller of the present invention when the rear wheel is released.

[0052] Figure 16 This is a structural diagram of the bearing inside the wheel seat of the stroller of the present invention.

[0053] Figure 17 This is a side sectional view of the wheel group orientation mechanism of the stroller of the present invention when the rear wheels are locked.

[0054] Figure 18 This is an internal structural diagram of the operating part of the wheel alignment mechanism of the stroller of the present invention.

[0055] stroller 100

[0056] Frame 1, Front wheel 2, Rear wheel 3, Wheelset brake mechanism 4, Wheelset steering mechanism 5

[0057] Wheel seat 11, horizontal tube 12, elongated hole 12a

[0058] Wheel seat 31, engagement hole 32, pivot sleeve 31a, bearing 33, toothed structure 311

[0059] Drive component 41, drive pin 42, locking component 43, elastic component 44, pushing component 45, elastic reset component 46, rear foot tube 47, first traction component 48, second traction component 49, locking assembly 410, pedal 411, pushing component 412, inclined groove 412a, receiving protrusion 412b, reset component 413, first sleeve 414, second sleeve 415, drive inclined groove 41a, drive shaft 42a, moving pin 45a, receiving part 48a, pivot joint 49a, pivot joint 49b, locking recess 410a, locking pin 410b, compression spring 410c, guide groove 410d

[0060] Operating unit 51, third traction component 52, positioning pin 53, return spring 54, inclined slide 51a, moving head 52a Detailed Implementation

[0061] To illustrate the technical content, structural features, and effects of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0062] like Figure 1 and Figure 2 As shown, the stroller 100 of the present invention includes a frame 1, a pair of omnidirectionally rotatable front wheels 2, a pair of rear wheels 3, a wheel assembly braking mechanism 4, and a wheel assembly directional mechanism 5. The rear wheels 3 are pivotally connected to the wheel seats 31 in a rolling manner. The wheel seats 31 are omnidirectionally rotatable on the frame 1, and the rolling axis of the rear wheels 3 is perpendicular to the rotation center axis of the wheel seats 31. The wheel assembly braking mechanism 4 is disposed on the frame 1 and can simultaneously lock both rear wheels 3 to prevent the rear wheels 3 from rolling, or simultaneously release the lock to allow the rear wheels 3 to roll. The wheel assembly directional mechanism 5 is disposed on the frame 1 and can simultaneously limit the two rear wheels 3 to prevent the rear wheels 3 from omnidirectionally rotating around the rotation center axis of the wheel seats 31, or simultaneously release the limit to allow the rear wheels 3 to omnidirectionally rotate around the rotation center axis of the wheel seats 31. Specifically, as follows:

[0063] Combination Figure 1 and Figure 2 And see Figures 3 to 8The wheel assembly braking mechanism 4 includes a drive member 41 and a braking assembly. In this embodiment, since there are two rear wheels 3, there are two braking assemblies. The two braking assemblies are symmetrically arranged and both are driven by the same drive member 41, with each braking assembly controlling one rear wheel 3. Each braking assembly includes a drive pin 42, a traction member, a locking member 43, an elastic member 44, a pushing member 45, an elastic reset member 46, and a pushing member 412. The wheel assembly braking mechanism 4 can simultaneously lock or release the two rear wheels 3. Specifically, wheel seats 11 are provided on both sides of the rear end of the frame 1, and a cross tube 12 is provided between the two wheel seats 11. The drive member 41 has a sleeve-like structure and can be rotatably fitted onto the cross tube 12 around its central axis. The drive member 41 extends into a pedal 411 for stepping. The drive pin 42 is axially movable within the cross tube 12 along its central axis. The drive member 41 can simultaneously drive both drive pins 42 to move. An elastic element 44 is disposed between the two drive pins 42, providing an elastic force to reset the drive pins 42, allowing them to repeat their action. Since the two brake assemblies are symmetrically arranged, their locking or unlocking structures for the two rear wheels 3 are identical on both sides; therefore, only one side of the brake assembly will be described below. The drive pin 42 is connected to one end of a traction member, which is located inside the transverse tube 12. The other end of the traction member is connected to a pusher 412, which is movably disposed within the wheel seat 31 of the stroller. A pusher 45 is movably disposed within the pusher 412, and the direction of movement of the pusher 412 within the wheel seat 31 is perpendicular to the direction of movement of the pusher 45. The pusher 45 is connected to a locking element 43. The drive element 41 can simultaneously drive the drive pins 42 of both brake assemblies to move, thereby driving the pusher 412 to move via the traction member, which in turn drives the locking element 43 to move, thus locking or unlocking the rear wheel 3 located on the same side. The pushing member 412 has a sloping groove 412a, and the pushing member 45 has a movable pin 45a. The movable pin 45a is movably inserted into the sloping groove 412a, so that the pushing member 45 moves closer to the rear wheel 3. The locking member 43 is movably connected to the pushing member 45. A reset member 413 is provided between the locking member 43 and the pushing member 45. Specifically, the locking member 43 has a T-shaped structure, wherein the vertical shaft is movably sleeved with the pushing member 45, the horizontal shaft of the locking member 43 extends out of the pushing member 45, one end of the reset member 413 abuts against the end of the vertical shaft, and the other end abuts against the inner bottom of the pushing member 45. The reset member 413 is a compression spring. More specifically, the push member 45 has an accommodating space inside, which extends through one end of the push member 45. The reset member 413 is built into the accommodating space of the push member 45. When the locking member 43 and the push member 45 move closer to the axle of the rear wheel 3, the locking member 43 retracts into the push member 45, and the reset member 413 is squeezed. Conversely, when the locking member 43 and the push member 45 move away from the axle of the rear wheel 3, the reset member 413 extends under its own elastic force, causing the locking member 43 to extend.The elastic reset member 46 provides an elastic force to reset the locking member 43, allowing the locking member 43 to automatically disengage from the rear wheel 3. The elastic reset member 46 is disposed within the wheel seat 31, with one end abutting against the push member 45 and the other end abutting against the inner wall of the wheel seat 31; the elastic reset member 46 is a compression spring. When the push member 45 is driven towards the axle of the rear wheel 3, the elastic reset member 46 is compressed; conversely, when the driving force of the push member 45 disappears, the elastic reset member 46, under its own elastic force, will move the push member 45 and the locking member 43 away from the rear wheel 3.

[0064] Please see again Figures 9 to 10 More specifically, a pair of symmetrical drive grooves 41a are provided on the wall of the drive member 41, and the distance between the same end of the two drive grooves 41a is smaller than the distance between the other ends. The drive pin 42 is provided with a drive shaft 42a, and the central axis of the drive shaft 42a is perpendicular to the moving direction of the drive pin 42. An elongated hole 12a extending along the central axis of the horizontal tube 12 is provided on the horizontal tube 12. The drive shaft 42a is movably inserted into the elongated hole 12a and simultaneously inserted into the drive groove 41a, so that when the drive member 41 rotates, it drives the drive pin 42 to move through the drive groove 41a. By providing the drive groove 41a, the drive groove 41a can convert the torque of the drive member 41 rotation into an axial tension force on the drive pin 42, thereby causing the drive pin 42 to stretch the traction member, and then the traction member to stretch the locking member 43, thus achieving the purpose of driving the locking member 43 to move.

[0065] For example Figure 6 and Figure 7As shown, the wheel brake mechanism 4 also includes a rear foot tube 47, which is fixedly mounted on the wheel seat 11 of the frame 1 and extends downward from the wheel seat 11. The rear wheel seat 31 is rotatably sleeved on the rear foot tube 47. The traction components include a first traction component 48 and a second traction component 49, both of which are steel wires. One end of the first traction component 48 is connected to the drive pin 42, and the other end of the first traction component 48 extends into the rear foot tube 47 and is rotatably connected to one end of the second traction component 49. The other end of the second traction component 49 is connected to the pusher 412. More specifically, the first traction component 48 is located at one end of the rear foot tube 47, and a connector 48b is provided at one end of the first traction component 48. The connector 48b is integrally connected to the first traction component 48. A pivot joint 49a is provided at one end of the second traction component 49, and the pivot joint 49a is integrally connected to the second traction component 49. The pivot joint 49a is a spherical head. A receiving portion 48a is provided between the first traction member 48 and the second traction member 49. The receiving portion 48a has a hollow structure, and both its upper and lower ends have openings that extend through the inside and outside. A connector 48b passes through the opening at the upper end of the receiving portion 48a and is engaged within it. A pivot connector 49a passes through the opening at the lower end of the receiving portion 48a and is rotatably engaged within it, thereby connecting the first traction member 48 and the second traction member 49. The receiving portion 48a is suspended within the rear leg tube 47. Specifically, the pivot connector 49a is rotatably disposed within the receiving portion 48a, and the spherical surface of the pivot connector 49a makes point contact with the bottom surface of the receiving portion 48a to reduce the frictional area and allow for smoother rotation of the pivot connector 49a. The traction line of the second traction member 49 is led outward through the opening at the lower end of the receiving portion 48a. The receiving portion 48a cooperates with the pivot joint 49a. Since the pivot joint 49a can rotate freely within the receiving portion 48a, the connection between the first traction member 48 and the second traction member 49 can prevent the first traction member 48 from twisting due to the rotation of the rear wheel seat 31, thus avoiding affecting the operation of the drive pin 42 and the drive member 41. The wheel assembly brake mechanism 4 also includes a first sleeve 414 and a second sleeve 415. The first sleeve 414 is fixed inside the rear foot tube 47, and the second sleeve 415 is built into the rear foot tube 47 and rotatably connected to the first sleeve 414. The first sleeve 414 and the second sleeve 415 form an internal space that allows the first traction member 48 and the second traction member 49 to pass through. The receiving portion 48a is located within the internal space. By providing a first sleeve 414 and a second sleeve 415, and allowing the second sleeve 415 to rotate relative to the first sleeve 414, the receiving portion 48a can be protected, and the problem of interference caused by the rotation of the wheel seat 31 can be solved. When the wheel seat 31 rotates, the receiving portion 48a, the connector 48b, and the first sleeve 414 will not rotate, while the pivot joint 49a and the second sleeve 415 will rotate with the wheel seat 31.

[0066] like Figure 7and Figure 16 As shown, a bearing is provided between the frame 1 and the wheel seat 31. Specifically, the bearing 33 is located between the rear leg tube 47 and the wheel seat 31. By providing the bearing 33, the rotation between the rear leg tube 47 and the wheel seat 31 can be made more stable and smooth, ensuring that the wheel seat 31 can rotate in all directions. Specifically, the wheel seat 31 has a pivot sleeve 31a that is pivotally connected to the rear leg tube 47. The bearing 33 is located inside the pivot sleeve 31a, and the wall surface of the pivot sleeve 31a that contacts the outer wall of the bearing 33 has a circumferential toothed structure 311. By adding the toothed structure 311, the deformation of the pivot sleeve 31a can be increased, thereby preventing the pivot sleeve 31a from breaking and extending its service life.

[0067] Please also refer to Figure 6 More specifically, the pusher 412 has an outwardly protruding receiving protrusion 412b, and the other end of the second traction member 49 has a pivot joint 49b, which is a spherical head. The pivot joint 49b is rotatably disposed within the receiving protrusion 412b and makes spherical contact with the receiving protrusion 412b, connecting the pusher 412 and the second traction member 49. One end of the elastic reset member 46 abuts against the end of the pusher 45, and the other end abuts against the wheel seat 31. By engaging the receiving protrusion 412b with the pivot joint 49b, since the pivot joint 49b can rotate freely within the receiving protrusion 412b, the second traction member 49, after being connected to the pusher 412, can be prevented from twisting due to the rotation of the wheel.

[0068] For example Figure 11 and Figure 12 As shown, a locking assembly 410 is provided between the drive member 41 and the frame 1 to lock or unlock the drive member 41. Specifically, the locking assembly 410 includes a locking pin 410b movably disposed on the drive member 41, two locking recesses 410a disposed on the crossbar of the frame, and a compression spring 410c. The compression spring 410c is disposed between the locking pin 410b and the drive member 41 to drive the locking pin 410b to extend. When the drive member 41 rotates to the position of locking the rear wheel, the locking pin 410b engages with one of the locking recesses 410a to position the drive member 41; when the drive member 41 rotates to the position of unlocking the rear wheel, the locking pin 410b engages with the other locking recess 410a to position the drive member 41. This allows the drive member 41 to keep the wheel locked without requiring the user to apply force to the drive member 41, improving ease of use. The drive member 41 is also provided with a guide groove 410d on one side. The guide groove 410d is located between two locking recesses 410a. When the drive member 41 rotates and releases the rear wheel, the locking pin 410b can slide along the guide groove 410d to the other locking recess 410a. When the drive member 41 rotates and locks the rear wheel, the locking pin 410b slides along the guide groove 410d to one of the locking recesses 410a, thereby guiding the drive member 41 when it rotates.

[0069] Please see again Figures 13 to 15 The hub of the rear wheel 3 is provided with engagement holes 32 circumferentially distributed around the rolling shaft of the rear wheel 3. The opening of the engagement holes 32 faces outward. The transverse shaft of the locking member 43 can enter the engagement holes 32 to lock the rear wheel 3 or exit the engagement holes 32 to release the rear wheel 3.

[0070] Please see again Figure 17 and Figure 18 The wheel alignment mechanism 5 includes an operating part 51, a third traction member 52, a positioning pin 53, and a return spring 54. The third traction member 52 is made of steel wire. The operating part 51 is located on the armrest of the stroller 100 and connected to one end of the third traction member 52. The positioning pin 53 is located near the rear wheel 3 and is movably mounted on the frame 1. The other end of the third traction member 52 extends to the vicinity of the rear wheel 3 and is connected to the positioning pin 53. The return spring 54 provides an elastic force to reset the positioning pin 53. The return spring 54 is located between the positioning pin 53 and the wheel seat 11. The positioning pin 53 can be inserted into the positioning hole of the wheel seat 31 and position the rear wheel 3 (i.e., the rear wheel 3 is in a locked state), or it can be removed from the wheel seat 31 and release the rear wheel 3 (i.e., the rear wheel 3 is in a released state, at which time the four wheels can rotate in all directions to achieve a drifting function). The operating part 51 is movably mounted on the push handle of the stroller frame 1 of the stroller 100. The operating part 51 has two symmetrically arranged oblique grooves 51a, with the distance between their ends on the same side being less than the distance between their ends on the opposite side. The end of the third traction member 52 has a moving head 52a, which is movably mounted on the frame 1. The moving head 52a moves perpendicular to the moving direction of the operating part 51, and the moving heads 52a of the two third traction members 52 are movably inserted into the oblique grooves 51a. Therefore, when the user presses the operating part 51, the oblique grooves 51a can move the two moving heads 52a closer together or further apart, thereby subjecting the two third traction members 52 connected to their respective moving heads 52a to a pulling force, thus driving the positioning pin 53.

[0071] In summary, and referring to the accompanying drawings, when the stroller needs to be braked, pressing the pedal causes the drive member 41 to rotate on the horizontal tube 12. The drive groove 41a of the drive member 41 drives the drive shaft 42a from one end of the drive groove 41a to the other end, causing the drive pin 42 to move. The drive pin 42 then drives the first traction member 48, which in turn drives the second traction member 49. The second traction member 49 drives the pusher 412, which in turn drives the pusher 45 through the groove 412a and the moving pin 45a. The pusher 45 then drives the locking member 43, which then enters the engagement hole 32 of the rear wheel 3, thus locking the rear wheel 3. At this time, the rear wheel 3 cannot roll, the stroller 100 is in a braked state, and cannot move. When unlocking is required, the pedal needs to be lifted, causing the pedal to drive the drive member 41. The drive member 41 can be reset under the action of the elastic member 44, thereby releasing the first traction member 48 and the second traction member 49. Under the action of the elastic reset member 46, the push member 412 and the push member 45 are reset. At this time, the locking member 43 exits the engagement hole 32, thereby releasing the rear wheel 3, and the stroller 100 can then drive.

[0072] When the stroller 100 needs to be set to a drifting state, while keeping the wheel brake mechanism 4 released from the rear wheel 3, operate the operating part 51. The operating part 51 moves the third traction member 52, causing the positioning pin 53 to disengage from the positioning hole of the wheel seat 31. This allows the rear wheel 3 to rotate around the rear foot tube 47. As the wheel seat 31 rotates, it causes the second sleeve 415 to rotate relative to the first sleeve 414, and the pivot joint 49a of the second traction member 49 can rotate within the receiving part 48a. At this time, both the front wheel 2 and the rear wheel 3 of the stroller 100 can rotate, allowing the stroller 100 to perform drifting maneuvers such as lateral movement. When the operating part 51 is released, the positioning pin 53, under the action of its reset elasticity, inserts into the positioning hole of the wheel seat 31, thereby relocking the rear wheel 3. At this time, the rear wheel 3 of the stroller 100 can only roll and cannot rotate, and the stroller 100 is in a non-drifting state.

[0073] Compared with the prior art, this invention utilizes a driving member 41 to drive two driving pins 42 to move, causing the two driving pins 42 to drive traction members respectively. Taking advantage of the flexible extension characteristic of the traction members, the two traction members can extend to the rear wheel 3 and pull the pushing member 412. The pushing member 412 then drives the pushing member 45 and locking member 43 located near the rear wheel 3, allowing the two locking members 43 to lock the rear wheel 3 located on the same side. Therefore, the user only needs to step on one driving member 41 to simultaneously lock both rear wheels 3, achieving a double-brake function with a single step. Furthermore, the structure is simple and easy to operate. In addition, by allowing the wheel seat 31 to rotate omnidirectionally relative to the frame 1, the stroller 100 can move laterally, thus possessing drifting ability. Simultaneously, the wheel set orientation mechanism 5 locks or unlocks the wheel seat 31, allowing this drifting or non-drifting function to be switched at any time, greatly improving the convenience and flexibility of use.

[0074] The above-disclosed examples are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention shall still fall within the scope of the present invention.

Claims

1. A wheel brake mechanism for locking the wheels of a stroller, characterized in that: The device includes a drive unit and a brake assembly. The brake assembly includes a drive pin, a traction member, a pusher member, a pusher member, and a locking member. The drive pin is connected to one end of the traction member, and the other end of the traction member is connected to the pusher member. The pusher member is movably disposed within the wheel seat of the stroller. The pusher member is movably disposed within the pusher member and is connected to the locking member. The drive unit drives the drive pin of the brake assembly to move, thereby driving the pusher member to move via the traction member. The pusher member drives the pusher member to move, and the pusher member drives the locking member to move, thereby locking or unlocking the wheel.

2. The wheel brake mechanism as described in claim 1, characterized in that: The number of brake assemblies is two, and the driving member simultaneously drives the driving pins of both brake assemblies to move.

3. The wheel brake mechanism as described in claim 1, characterized in that: The pushing member is provided with an inclined groove, and the jacking member is provided with a movable pin. The movable pin is movably inserted into the inclined groove so that the jacking member moves closer to or away from the axis of the wheel.

4. The wheel brake mechanism as described in claim 1, characterized in that: The locking member is partially sleeved within the pushing member. Correspondingly, when the pushing member drives the pushing member to move, the locking member moves closer to or further away from the axle of the wheel along with the pushing member.

5. The wheel brake mechanism as described in claim 4, characterized in that: The locking member is movably connected to the pushing member, and a reset member is provided between the locking member and the pushing member. The locking member has a T-shaped structure and has a vertical axis and a horizontal axis. The vertical axis is movably sleeved with the pushing member, and the horizontal axis extends out of the pushing member. One end of the reset member abuts against the end of the vertical axis, and the other end abuts against the inner bottom of the pushing member.

6. The wheel brake mechanism as described in claim 1, characterized in that: The driving component is provided with a pair of symmetrical driving grooves. The driving pin is provided with a driving shaft on its outer side perpendicular to its own central axis. The driving shaft is movably inserted into the driving groove so that the driving pin can be driven to move through the driving groove when the driving component rotates.

7. The wheel brake mechanism as described in claim 1, characterized in that: It also includes an elastic element disposed between the two drive pins to provide a resilient force for resetting the two drive pins.

8. The wheel brake mechanism as described in claim 1, characterized in that: The traction component includes a first traction component and a second traction component. One end of the first traction component is connected to the drive pin, and the other end of the first traction component is rotatably connected to one end of the second traction component. The other end of the second traction component is connected to the pusher component.

9. The wheel brake mechanism as described in claim 8, characterized in that: The first traction member has a connector, the second traction member has a pivot joint, and a receiving portion is provided between the first traction member and the second traction member. The connector is disposed in the receiving portion, and the pivot joint is rotatably disposed in the receiving portion so that the first traction member and the second traction member can be connected.

10. The wheel brake mechanism as described in claim 8, characterized in that: The pusher has a receiving protrusion, and the second traction member has a pivot joint, which is disposed in the receiving protrusion to connect the pusher and the second traction member.

11. The wheel brake mechanism as described in claim 5, characterized in that: When the locking member and the pushing member move closer to the axle of the rear wheel, the locking member retracts into the pushing member, and the reset member is squeezed; when the locking member and the pushing member move away from the axle of the rear wheel, the reset member extends under its own elastic force, causing the locking member to extend.

12. The wheel brake mechanism as described in claim 9, characterized in that: The wheel assembly braking mechanism also includes a rear leg tube, which is mounted on the stroller frame. The wheel seat is rotatably fitted onto the rear leg tube, and the receiving portion is disposed inside the rear leg tube.

13. The wheel brake mechanism as described in claim 12, characterized in that: The wheel assembly braking mechanism further includes a first sleeve and a second sleeve. The first sleeve is fixed inside the rear foot tube, and the second sleeve is built inside the rear foot tube and rotatably connected to the first sleeve. The first sleeve and the second sleeve form an internal space that allows the first traction member and the second traction member to pass through. The receiving part is located within the internal space.

14. The wheel brake mechanism as described in claim 4, characterized in that: The wheel assembly braking mechanism further includes an elastic reset member that provides an elastic force to reset the push member.

15. The wheel brake mechanism as described in claim 1, characterized in that: The wheel hub is provided with engagement holes distributed around the wheel's rolling axis. The openings of the engagement holes face outwards. The locking member enters the engagement hole through the opening to lock the wheel or exits the engagement hole to release the wheel.

16. The wheel brake mechanism as described in claim 1, characterized in that: The drive unit has a sleeve-like structure and is rotatably fitted onto the crossbar of the stroller frame, and the drive unit extends into a foot pedal for stepping.

17. The wheel brake mechanism as described in claim 16, characterized in that: A locking assembly is provided between the drive unit and the vehicle frame to lock or unlock the drive unit.

18. The wheel brake mechanism as described in claim 17, characterized in that: The locking assembly includes a locking pin disposed on the drive member and two locking recesses disposed on the frame. When the drive member is rotated to the position of locking the wheel, the locking pin engages with one of the locking recesses to position the drive member; when the drive member is rotated to the position of releasing the wheel, the locking pin engages with the other locking recess to position the drive member.

19. The wheel brake mechanism as described in claim 18, characterized in that: The locking pin is movably disposed on the drive member, and the locking assembly further includes a compression spring disposed between the locking pin and the drive member to drive the locking pin to extend.

20. The wheel brake mechanism as described in claim 18, characterized in that: The drive member is also provided with a guide groove on one side, which is located between the two locking recesses. When the drive member rotates and releases the wheel, the locking pin slides along the guide groove toward the other locking recess. When the drive member rotates and locks the wheel, the locking pin slides along the guide groove toward one of the locking recesses.

21. The wheel brake mechanism as described in claim 18, characterized in that: The stroller has a wheel seat, and the direction of movement of the pusher within the wheel seat is perpendicular to the direction of movement of the pusher.

22. A stroller comprising a frame and a pair of omnidirectionally rotatable front wheels, characterized in that: It also includes a pair of rear wheels and a wheel brake mechanism as described in any one of claims 1 to 21, the wheel brake mechanism being mounted on the frame and capable of simultaneously locking both rear wheels to prevent the rear wheels from rolling.

23. The stroller as described in claim 22, characterized in that: The stroller also includes a wheel alignment mechanism. The rear wheel is pivotally connected to the wheel seat of the stroller. The wheel seat is omnidirectionally mounted on the frame. The wheel alignment mechanism simultaneously limits the two wheel seats to prevent omnidirectional rotation of the wheel seats, or simultaneously releases the limits to allow omnidirectional rotation of the wheel seats.

24. The stroller as described in claim 23, characterized in that: The wheel alignment mechanism includes an operating part, a third traction member, a positioning pin, and a return spring. The operating part is connected to one end of the third traction member, and the other end of the third traction member is connected to the positioning pin. The return spring provides an elastic force to reset the positioning pin. The positioning pin can be inserted into the wheel seat to position the rear wheel or removed from the wheel seat to release the rear wheel.

25. The stroller as described in claim 24, characterized in that: The operating part is movably mounted on the vehicle frame, and the operating part is symmetrically provided with two inclined sliding grooves. The end of the third traction member is provided with a moving head, which is movably mounted on the vehicle frame and movably inserted into the inclined sliding groove.

26. The stroller as described in claim 23, characterized in that: A bearing is provided between the frame and the wheel seat. The frame has a rear leg tube. The wheel seat has a pivot sleeve that is pivotally connected to the rear leg tube. The bearing is located between the pivot sleeve and the rear leg tube.

27. The stroller as described in claim 26, characterized in that: The wall surface of the pivot sleeve that contacts the outer wall of the bearing has a toothed structure in the circumferential direction.

28. A stroller, comprising: Frame; Wheels, connected to the vehicle frame; as well as Wheelset braking mechanism, including: A drive unit, which is rotatably connected to the vehicle frame; Braking assembly, the braking assembly being connected to the drive member; and A locking assembly is disposed between the drive member and the vehicle frame. The locking assembly includes a locking pin and a guide groove disposed on the drive member, and two locking recesses disposed on the vehicle frame. The locking pin is movably disposed on the drive member, and the guide groove is disposed between the two locking recesses. When the drive member rotates and drives the brake assembly to lock the wheel, the locking pin slides along the guide groove toward one of the locking recesses to position the drive member; when the drive member rotates and drives the wheel to release, the locking pin slides along the guide groove toward the other locking recess to position the drive member.

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