Brake mechanism for a child's pushchair

Abstract

The application discloses a brake mechanism of a child stroller, which comprises two wheel assemblies, a connecting piece, two locking pieces, two driving pieces and a rigid linkage piece. The wheel assembly comprises a wheel seat and a wheel body rotatably connected with the wheel seat. The two ends of the connecting piece are respectively connected with the two wheel seats. The two locking pieces are movably arranged on the corresponding wheel seats and have a brake position for locking the wheel body to limit the rotation of the wheel body and a brake release position for releasing the wheel body to allow the rotation of the wheel body. The two driving pieces are used for driving the corresponding locking pieces to switch between the brake position and the brake release position, and one of the driving pieces is provided with an operation part. The linkage piece is arranged in the connecting piece and connected with the two driving pieces at two ends to realize the synchronous rotation of the two driving pieces. Compared with the prior art, the linkage piece will not be bent under stress, the synchronism of the two driving pieces is ensured, and the synchronism of the brake and the brake release of the two wheel assemblies is improved.

Description

Technical Field

[0001] This application relates to the technical field of stroller technology, specifically a braking mechanism for a children's stroller. Background Technology

[0002] Existing braking mechanisms used in strollers or children's vehicles, such as the one disclosed in patent document CN221393647U, involve a braking mechanism between the two rear wheels of the stroller frame connected by a steel cable. Due to the long distance between the two rear wheels, the steel cable will bend to a certain extent, affecting the effective length, which in turn reduces the synchronicity of braking and releasing of the two rear wheels. Utility Model Content

[0003] This application provides a braking mechanism for a child stroller that improves the synchronization of braking and releasing.

[0004] This application provides a braking mechanism for a child stroller, comprising: Two wheel assemblies, each wheel assembly including a wheel seat and a wheel body rotatably connected to the wheel seat; The connector has two wheel seats connected to its two ends respectively; Two locking components are movably mounted on the corresponding wheel seats, and have a braking position to lock the wheel body and restrict its rotation, and a releasing position to release the wheel body and allow it to rotate; Two drive units are used to drive the corresponding locking unit to switch between the braking position and the releasing position, and one of the drive units has an operating part; A rigid linkage is disposed inside the connecting member, with its two ends connected to the two driving members respectively, so as to realize the synchronous rotation of the two driving members.

[0005] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0006] Optionally, the driving member is rotatably mounted on the wheel seat, the locking member is horizontally slidably arranged on the wheel seat, and a transmission member is provided between the driving member and the corresponding locking member. The driving member drives the locking member to switch between the braking position and the releasing position through the transmission member.

[0007] Optionally, both the driving component and the transmission component can rotate around a horizontal axis. The transmission component is provided with a plurality of ratchet teeth arranged circumferentially, and the driving component is provided with a pawl that engages with the ratchet teeth. During braking or releasing the brake, the driving component drives the transmission component to rotate synchronously.

[0008] Optionally, the braking mechanism includes a first elastic element that acts on the driving member to reset it. After the braking or releasing operation is completed, the driving member rotates in the opposite direction under the action of the first elastic element, while the transmission member remains stationary.

[0009] Optionally, the transmission member has a plurality of alternating and spaced braking and releasing positions that abut against the locking member, and a guide ramp is provided between adjacent braking and releasing positions.

[0010] Optionally, the braking mechanism includes a second elastic element that acts on the locking member to bring it closer to the transmission member.

[0011] Optionally, the wheel seat is provided with a limiting part that limits the rotation angle of the drive component.

[0012] Optionally, the outer and inner portions of the wheel seat, the outer and inner portions and the drive member are connected by a sleeve, and the drive member is located between the outer and inner portions and is axially limited by the outer and inner portions.

[0013] Optionally, the connector includes a connecting pipe and plugs fitted at both ends of the connecting pipe, the plugs having radially enlarged blocking portions that restrict the wheel seat from disengaging from the connector.

[0014] Optionally, the blocking part is provided with an anti-rotation part to restrict the rotation of the wheel seat relative to the connecting member.

[0015] The braking mechanism of the stroller in this application has a rigid linkage structure with poor bending and ductility, thereby ensuring the synchronization of the two drive components and improving the synchronization of braking and releasing of the two wheel assemblies. Attached Figure Description

[0016] Figure 1 This is a structural view of a children's stroller according to an embodiment of this application; Figure 2 for Figure 1 A partial structural view of a children's stroller after the handlebars have been removed, viewed from above. Figure 3 for Figure 1 Exploded view of the wheel body and wheel seat in the wheel assembly; Figure 4 for Figure 1 Exploded view of the wheel body, outer side and other components of the wheel assembly; Figure 5 for Figure 2 A cross-sectional view along the AA direction; Figure 6 This is a structural view of the transmission component in a braking mechanism according to an embodiment of this application; Figure 7This is a partial structural view of the braking mechanism of this application when the outer part is removed and the locking member is in the released position. Figure 8 This is a partial structural view of the braking mechanism of this application when the outer part is removed and the locking member is in the braking position. Figure 9 For Figure 2 Partial bottom view (after removing the pedals); Figure 10 for Figure 9 Partial sectional view along the BB direction; Figure 11 This is an exploded view of the connecting pipe, plug, and linkage component in the braking mechanism of this application; Figure 12 for Figure 10 Enlarged view of section C.

[0017] The annotations in the figure are explained as follows: 100. Frame; 110. Front leg; 111. Front wheel; 120. Rear leg; 130. Handlebars; 300. Wheel assembly; 310. Wheel seat; 311. Outer side; 312. Inner side; 313. Connecting seat; 314. Main body; 320. Wheel body; 321. Locking groove; 323. Axle; 400. Connector; 410. Connecting pipe; 420. Plug; 421. Body; 422. Blocking part; 423. Anti-rotation part; 500. Locking element; 510. Second elastic element; 600, Driving component; 610, Operating part; 620, Pawl; 630, First elastic component; 700. Linkage component; 710. Arc groove; 810. First fastener; 820. Second fastener; 900, Transmission component; 901, Racket; 902, Brake position; 903, Brake release position; 904, Guide ramp. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or it can be connected to a component in between. When a component is said to be "set on" another component, it can be directly set on the other component or it may be set to a component in between.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] In this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number or order of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] like Figure 1 As shown, the stroller includes a frame 100, which includes a front leg 110, a rear leg 120, and a handle 130. The bottom of the front leg 110 is equipped with a front wheel 111, and the rear legs 120 are two oppositely arranged and equipped with a braking mechanism.

[0023] like Figures 2-12 This application provides a braking mechanism, which includes a wheel assembly 300, a connecting member 400, two locking members 500, two driving members 600, and a linkage member 700. For example... Figure 2 and Figure 3 As shown, there are two wheel assemblies 300. Each wheel assembly 300 includes a wheel seat 310 and a wheel body 320 rotatably connected to the wheel seat 310. The wheel seat 310 and the corresponding rear leg 120 are fixedly connected. The wheel body 320 has an axle 323 and locking grooves 321 arranged circumferentially along the axle 323. The stroller of this application is placed on a horizontal plane, and the axle extends in the horizontal direction.

[0024] like Figure 3 and Figure 4As shown, each wheel seat 310 is movably disposed within a locking member 500. The locking member 500 has a braking position for inserting into a locking groove 321 to lock the wheel body 320 and restrict its rotation, and a releasing position for disengaging from the locking groove 321 to release the wheel body 320 and allow its rotation. The position switching of the locking member 500 is achieved by a driving member 600. The driving member 600 rotates relative to the wheel seat 310. For ease of operation, at least one of the driving members 600 has an operating part 610, such as a pedal for stepping or flicking as shown in the figure.

[0025] The two ends of the connector 400 are respectively connected to the two wheel seats 310. The connector 400 is a hollow structure with a rigid linkage 700 inside. The two ends of the linkage 700 are respectively connected to the two driving components 600 to realize the synchronous rotation of the two driving components 600. "Rigid" is understood as not deforming when subjected to external force, and the deformation includes bending and tension. The specific structure is described in the following embodiment. In the braking mechanism of this application, the linkage is a rigid structure with poor bending and ductility. Compared with the existing steel rope, it eliminates the possibility of bending under force, thereby ensuring the synchronicity of the two driving components and improving the synchronicity of braking and releasing of the two wheel assemblies.

[0026] like Figure 11 and Figure 12 As shown, the connector 400 includes a hollow connecting tube 410 and plugs 420 fitted at both ends of the connecting tube 410. The connecting tube 410 extends along the axis of the wheel axle 323. The wheel seat 310 includes an outer portion 311 and an inner portion 312. The outer portion 311, the inner portion 312, and the drive member 600 pass through the outer periphery of the connecting tube 410. The outer portion 311, the inner portion 312, and the connector 400 are fixed in the axial and circumferential directions, as described below. The drive member 600 is located between the outer portion 311 and the inner portion 312 and is axially limited by the outer portion 311 and the inner portion 312. The drive member 600 rotates about the axis of the connecting tube 410.

[0027] In one embodiment, the inner side 312 and the connecting tube 410 are fixedly connected by a first fastener 810, such as a rivet or bolt.

[0028] In one embodiment, the outer portion 311 includes an axially arranged connecting seat 313 and a main body 314, the connecting seat 313 being located outside the main body 314, and the two being separately connected, for example by bolts. The main body 314 and the inner portion 312 axially limit the drive member 600.

[0029] In one embodiment, the wheel body 320 and the wheel seat 310 are detachably connected, wherein a retaining ring is movably provided on the connecting seat 313 and a retaining groove is provided on the wheel axle 323, and the retaining ring and the retaining groove cooperate to prevent the wheel body 320 from coming off.

[0030] The plug 420 has a hollow structure, including a tubular body 421 nested within the connecting tube 410, and a blocking portion 422 extending radially out of the connecting tube 410. The blocking portion 422 abuts against the body 314 of the wheel seat 310 to prevent the wheel seat 310 from disengaging from the connector 400. In one embodiment, the blocking portion 422 is provided with an anti-rotation portion 423, which is a slot. A locking block adapted to the slot is provided on the body 314, thereby restricting the rotation of the body 314 relative to the connector 400. The connecting tube 410 is a metal cylindrical tube, and the plug 420 is made of plastic.

[0031] In one embodiment, the linkage 700 is made of a rigid circular tube, with both ends inserted into the body 421 of the plug 420. The drive member 600 is fixedly connected to the linkage 700 by a second fastener 820, such as a pin. In another embodiment, the wheel seat 310 is provided with a limiting part to restrict the rotation angle of the drive member 600. The first fastener 810 radially penetrates the linkage 700 and also serves as the limiting part. The linkage 700 has an arc-shaped groove 710 extending circumferentially and cooperating with the first fastener 810. like Figures 5-8 As shown, in one embodiment, the locking member 500 is horizontally slidably arranged on the wheel seat 310. A transmission member 900 is provided between the driving member 600 and the corresponding locking member 500. The driving member 600 drives the locking member 500 to switch between a braking position and a releasing position through the transmission member 900. Specifically, the transmission member 900 is a ratchet and is rotatably sleeved on the outer periphery of the connecting pipe 410. Multiple circumferentially arranged ratchet teeth 901 are provided on the inner side of the ratchet along the axial direction. A pawl 620 that cooperates with the ratchet teeth 901 is rotatably provided on the driving member 600. A torsion spring acting on the pawl 620 is provided between the pawl 620 and the driving member 600, so that the pawl 620 and the ratchet teeth 901 cooperate. Braking positions 902 and releasing positions 903 that cooperate with the locking member 500 are alternately arranged circumferentially on the outer side of the ratchet along the axial direction. A guide slope 904 is provided between adjacent braking positions 902 and releasing positions 903. Brake position 902 and release position 903 are slots, and corresponding locking parts 500 are provided with locking blocks that cooperate with the slots.

[0032] The braking mechanism also includes a first elastic element 630 and a second elastic element 510. The first elastic element 630 acts on the drive member 600 to reset it. The first elastic element 630 is, for example, a torsion spring disposed between the inner side 312 and the drive member 600. The second elastic element 510 acts on the locking member 500 to bring it closer to the transmission member 900. The second elastic element 510 is, for example, a cylindrical spring disposed within the wheel seat 310.

[0033] Actual braking and releasing operations: In the initial state, the locking member 500 and the releasing position 903 are engaged, corresponding to the locking member 500 being in the releasing position. During braking: force is applied to the driving member 600, causing the driving member 600 to rotate forward once, compressing the first elastic member 630. The pawl 620 drives the ratchet to rotate forward, and through the guide ramp 904, it drives the locking member 500 to slide and finally switch to the next braking position 902. When the external force is released, the first elastic member 630 resets and drives the driving member 600 to rotate in the opposite direction to reset. During this process, the pawl 620 rotates until it re-engages with the next ratchet.

[0034] When releasing the brake, follow the braking procedure again. The locking part 500 and the next release position 903 will cooperate, and the corresponding locking part 500 will be in the release position.

[0035] The braking mechanism of the stroller in this application has a rigid linkage structure with poor bending and ductility. Compared with existing steel cables, it eliminates the possibility of bending under stress, thereby ensuring the synchronization of the two drive components and improving the synchronization of braking and releasing of the two wheel assemblies.

[0036] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0037] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are quite specific and detailed. However, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A braking mechanism for a stroller, characterized in that, include: Two wheel assemblies, the wheel assembly including a wheel seat and a wheel body rotatably connected to the wheel seat; The connector has two wheel seats connected to its two ends respectively; Two locking elements are horizontally slidably arranged on the corresponding wheel seats, and have a braking position to lock the wheel body and restrict its rotation, and a releasing position to release the wheel body and allow it to rotate. Two driving components are used to drive the corresponding locking components to switch between the braking position and the releasing position. One of the driving components has an operating part and the driving component is rotatably mounted on the wheel seat about a horizontal axis. A rigid linkage is disposed inside the connecting member, with its two ends connected to two driving members respectively, so as to realize the synchronous rotation of the two driving members; A transmission component is disposed between the driving component and the locking component. The driving component drives the locking component to switch between a braking position and a releasing position through the transmission component. The transmission component can rotate around a horizontal axis and is provided with multiple ratchet teeth arranged circumferentially. The driving component is provided with a pawl that cooperates with the ratchet teeth. During braking or releasing operations, the driving component drives the transmission component to rotate synchronously.

2. The braking mechanism of the stroller according to claim 1, characterized in that, The braking mechanism includes a first elastic element that acts on the driving member to reset it. After the braking or releasing operation is completed, the driving member rotates in the opposite direction under the action of the first elastic element, while the transmission member remains stationary.

3. The braking mechanism of the stroller according to claim 1, characterized in that, The transmission component has multiple alternating and spaced braking and releasing positions that abut against the locking component, and a guide ramp is provided between adjacent braking and releasing positions.

4. The braking mechanism of the stroller according to claim 1, characterized in that, The braking mechanism includes a second elastic element that acts on the locking member to bring it closer to the transmission member.

5. The braking mechanism of the stroller according to claim 1, characterized in that, The wheel seat is provided with a limiting part that limits the rotation angle of the driving component.

6. The braking mechanism of the stroller according to claim 1, characterized in that, The outer and inner sides of the wheel seat, the outer and inner sides and the drive component are connected by a sleeve, the drive component is located between the outer and inner sides and is axially limited by the outer and inner sides.

7. The braking mechanism of the stroller according to claim 6, characterized in that, The connector includes a connecting pipe and plugs fitted at both ends of the connecting pipe. The plugs have radially enlarged blocking portions that restrict the wheel seat from disengaging from the connector.

8. The braking mechanism of the stroller according to claim 7, characterized in that, The blocking part is provided with an anti-rotation part that restricts the rotation of the wheel seat relative to the connecting member.

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