A stroller brake structure

Abstract

The application discloses a baby carriage brake structure, which comprises a wheel body frame, a rolling wheel body and a brake device. The rolling wheel body and the brake device are installed on the wheel body frame. The wheel body frame moves by rolling the rolling wheel body. The brake device is connected with the rolling wheel body to control the activity state of the rolling wheel body. The brake device comprises a pedal assembly, a brake wire, a driving rotating part and a follow-up plug-in part group. The brake wire is connected with the pedal assembly and the driving rotating part respectively. The pedal assembly pulls the brake wire to drive the driving rotating part to rotate relative to the follow-up plug-in part group. The follow-up plug-in part group is pushed into the socket by the driving rotating part to limit the rotation of the rolling wheel body. The pedal rotating part of the baby carriage brake structure can be continuously stepped in the same direction to realize the locking or loosening state of the rolling wheel body, and the operation is very convenient.

Description

[Technical Field]

[0001] This invention mainly relates to a brake structure for children's strollers. [Background Technology]

[0002] A children's vehicle is a tool vehicle used for children's play, including children's bicycles, strollers, baby walkers, tricycles, and electric toy cars. A braking device is one of the essential safety features of a children's vehicle, because parents may not always be beside the vehicle when it is stopped. If parked on a slope and the parents cannot hold onto the frame, the vehicle may roll and tip over, posing a significant danger to the child. Therefore, choosing a suitable braking system is crucial to ensuring children's safety.

[0003] Existing braking mechanisms mostly use brake pads to brake the wheels. However, with increased use, these brake pads inevitably wear down, and worn-out pads may no longer provide adequate braking, potentially leading to accidents for children riding in strollers. Therefore, there is an urgent need to develop a new braking mechanism for strollers to overcome the shortcomings of current applications. [Summary of the Invention]

[0004] To address at least one of the aforementioned problems, this invention proposes a novel structural solution. The present invention provides a brake structure for a children's stroller that employs the following technical solution:

[0005] A children's vehicle braking structure includes a wheel frame, a roller body, and a braking device. The roller body and the braking device are mounted on the wheel frame. The wheel frame moves by the rotation of the roller body. The braking device is connected to the roller body to control the movement of the roller body.

[0006] The braking device includes a pedal assembly, a brake cable, a drive component, and a follower plug assembly. The brake cable is connected to the pedal assembly and the drive component respectively. The pedal assembly pulls the brake cable to drive the drive component to rotate relative to the follower plug assembly.

[0007] The roller body is provided with a socket, and the follower plug group is pushed into the socket by the drive component to limit the rotation of the roller body;

[0008] The pedal assembly includes a pedal pivot, a cable holder, a fitting holder, a first spring, and a cross tube. The pedal pivot has a cavity, and the cross tube passes through the cavity to allow the pedal pivot to rotate relative to the cross tube.

[0009] The horizontal tube has a cavity and a guide block, with the guide block located inside the cavity. The guide block has a sliding surface and an inner recess. The pedal component has an elastic fastener, which has a first end and a second end, with a gap between the first end and the second end. The elastic fastener is connected to the pedal component through the second end. The pedal component drives the elastic fastener to connect with the guide block, so that the first end engages with the sliding surface to adjust the movement of the pedal component. The horizontal tube is connected to a brake cable, and the rotating horizontal tube pulls the brake cable to rotate the drive component.

[0010] Preferably, the guide surface includes a first guide surface and a second guide surface, the bottom ends of the first guide surface and the second guide surface intersect to form an angle, the top ends of the first guide surface and the second guide surface have a gap, and the concave part is located in the gap.

[0011] Preferably, the cavity has a first wall, a second wall, and a third wall, the first wall facing the first guide surface, the second wall facing the second guide surface, and the third wall facing the concave position; the third wall extends to the guide block with a apex angle, and the apex angle extends into the concave position.

[0012] Preferably, the horizontal tube is a hollow structure, the accessory seat is placed inside the horizontal tube, the accessory seat has a movable cavity to accommodate the pull cable seat and the first spring, the brake cable is connected to the pull cable seat to drive the pull cable seat to move in the movable cavity, and the two ends of the first spring respectively abut against the pull cable seat and the wall of the movable cavity to adjust the movement state of the pull cable seat.

[0013] Preferably, the horizontal tube is provided with a coil spring, which is connected to the horizontal tube and the treadle. The treadle is adjusted in rotational position relative to the horizontal tube by means of the coil spring.

[0014] Preferably, the horizontal tube is provided with a slot, and the tread mechanism is provided with a guide groove; the pull cable seat is provided with a protrusion, which passes through the slot and is connected to the guide groove. The rotating tread mechanism drives the protrusion to move through the guide groove, thereby driving the pull cable seat to move within the movable cavity.

[0015] Preferably, the wheel frame includes a front wheel frame and a rear wheel frame, each of which is independently equipped with a braking device and a roller body. The braking device is connected to control the movement state of the roller body to adjust the movement state of the wheel frame.

[0016] Preferably, the follower plug assembly includes a lower pressure seat, a top pressure block, and a plug-in rod, with the plug-in rod connected to the lower pressure seat via the top pressure block; the drive component is provided with a first protruding tooth, and the lower pressure seat is provided with a second protruding tooth. The first protruding tooth is provided with a first pressing surface, and the second protruding tooth is provided with a second pressing surface. The first protruding tooth and the second protruding tooth engage to abut against the first pressing surface and the second pressing surface; the drive component rotates relative to the lower pressure seat, causing the first pressing surface and the second pressing surface to rotate and press against each other, thereby causing relative movement between the drive component and the lower pressure seat.

[0017] Preferably, the brake cable is fastened to the drive component and wound around the drive component, and the movable cable holder pulls the drive component to rotate through the brake cable.

[0018] Preferably, the roller body includes a wheel arm, a wheel body, and a pin shaft. The wheel body is hinged to the wheel arm via a pin shaft, the pin shaft is mounted on the wheel arm, and the roller body is connected to the wheel body frame via the pin shaft. The wheel arm is provided with a guide groove, and the plug rod is placed in the guide groove to allow the plug rod to move along the guide groove. A second spring is provided in the guide groove to abut against the plug rod, so as to control the connection state between the plug rod and the wheel body through the second spring.

[0019] The beneficial effects of this invention compared to the prior art are as follows:

[0020] This invention provides a brake structure for a children's stroller, comprising a wheel frame, a roller body, and a brake device. The roller body is mounted on the wheel frame to assist in its movement. The brake device is connected to the roller body, and the rolling state of the roller body can be adjusted by controlling the brake device. The brake device uses a locking method involving an elastic fastener, a cavity, and a guide block. A pedal-operated component drives the elastic fastener, causing it to move to different positions with the cooperation of the cavity and the guide block. Continuous pedaling in the same direction locks or unlocks the roller body, making operation very convenient. [Attached Image Description]

[0021] Figure 1 This is a schematic diagram illustrating the application of the stroller brake structure in a preferred embodiment of the present invention.

[0022] Figure 2 A schematic diagram of the stroller brake structure in a preferred embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the drive component and the lower pressure seat in a preferred embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the pedal assembly in a preferred embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the pedal assembly structure in a preferred embodiment of the present invention.

[0026] Figure 6 This is a schematic diagram of the first exploded state of the pedal assembly in a preferred embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the second exploded state of the pedal assembly in a preferred embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the partial position structure of the horizontal tube in a preferred embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the guide groove in a preferred embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram showing the mating connection of the top pressure block, the plug rod, and the wheel in a preferred embodiment of the present invention.

[0031] Figure 11 This is a schematic diagram of the roller structure in a preferred embodiment of the present invention.

Detailed Implementation Methods

[0032] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0033] In the description of this invention, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature, and in the description of this invention, "a number" means two or more, unless otherwise explicitly specified.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "assembly," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] In this invention, unless otherwise specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "below," and "over" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Above," "below," and "below" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and its beneficial effects clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the invention.

[0038] The preferred embodiment provided by the present invention: See Figures 1 to 11 As shown, a children's stroller braking structure includes a wheel frame 1, roller bodies 2, and a braking device 3. The roller bodies 2 and the braking device 3 are mounted on the wheel frame 1. The wheel frame 1 moves by the rotation of the roller bodies 2. The braking device 3 is connected to the roller bodies 2 to control their movement. The wheel frame 1 includes a front wheel frame 11 and a rear wheel frame 12. Each of the front wheel frame 11 and the rear wheel frame 12 is independently equipped with a braking device 3 and a roller body 2. The braking state of the front wheel frame 11 is controlled by the braking device 3, and the braking state of the rear wheel frame 12 is controlled by the braking device 3. By adjusting the braking state of the front wheel frame 11 or the rear wheel frame 12, the movement state of the entire wheel frame can be achieved, realizing a bidirectional adjustable braking function. The movement state of the roller body 2 refers to the rolling braking state and the non-braking state of the wheel body 8, and the movement state of the wheel frame refers to the braking state and the non-braking state of the wheel frame.

[0039] Braking device 3 includes pedal assembly 4, brake cable 13, drive component 5, and follower plug assembly 6. Brake cable 13 is connected to pedal assembly 4 and drive component 5 respectively. Pedal assembly 4 pulls brake cable 13 to drive component 5 to rotate relative to follower plug assembly 6. Brake cable 13 is fastened to drive component 5 and wound around drive component 5. Movable cable holder 42 pulls drive component 5 to rotate via brake cable 13.

[0040] The roller body 2 includes a wheel arm 7, a wheel body 8, and a shaft 9. The wheel body 8 is provided with a socket 81 around its circumference. The wheel body 8 is hinged to the wheel arm 7 by a pin, allowing the wheel body 8 to rotate around the wheel arm 7. The shaft 9 is installed on the wheel arm 7, and the roller body 2 is connected to the wheel frame 1 through the shaft 9. The shaft 9 passes through a lower pressure seat 61 and a top pressure block 62, allowing the lower pressure seat 61 and the top pressure block 62 to rotate around the shaft. The wheel arm 7 is provided with a guide groove 71, and the guide groove 71 has an opening for the insertion rod 63 to extend and connect with the wheel body 8. The insertion rod 63 is placed in the guide groove 71 so that the insertion rod 63 can move along the guide groove 71. A second spring 72 is provided in the guide groove 71 to abut against the insertion rod 63, so as to control the connection state between the insertion rod 63 and the wheel body 8 through the second spring 72. The guide groove 71 is provided with a support block 73, and the plug rod 63 is provided with a through groove 631. The through groove 631 passes through the plug rod 63. The plug rod 63 is placed in the guide groove 71 so that the support block 73 extends into the through groove 631. The second spring 72 is placed in the through groove 631 to abut against the support block 73 to control the extension and retraction of the plug rod 63.

[0041] The pedal assembly 4 includes a pedal rotating component 41, a cable holder 42, an accessory holder 43, a first spring 44, and a horizontal tube 45. The pedal rotating component 41 has a through cavity 46, and the horizontal tube 45 passes through the through cavity 46 to allow the pedal rotating component 41 to rotate relative to the horizontal tube 45. The horizontal tube 45 has a recessed cavity 47 and a guide block 48, with the guide block 48 disposed within the recessed cavity 47. The guide block 48 has a sliding surface 481 and an inner recess 482, the inner recess 482 being arc-shaped. The pedal rotating component 41 has an elastic fastener 49, which is a metal strip. The elastic fastener 49 has a first end 491 and a second end 492, which are the two ends of the metal strip, and there is a gap between the first end 491 and the second end 492. When the first end 491 and the second end 492 move relative to each other, elastic force is generated due to the metal toughness of the elastic fastener 49 itself. The elastic fastener 49 is connected to the pedal 41 through the second end 492. The pedal 41 drives the elastic fastener 49 to connect with the guide block 48, so that the first end 491 and the guide surface 481 make contact to adjust the movement state of the pedal 41. The horizontal tube 45 is connected to the brake cable 13. Furthermore, the pull cable seat inside the horizontal tube is connected to the brake cable, so that the rotating horizontal tube 45 pulls the brake cable 13 to pull the drive member 5 to rotate.

[0042] In the initial state, the first end 491 is located on the side of the first guide surface 483. When the foot pedal is pressed, the pedal 41 rotates around the horizontal tube 45, and the first end 491 moves towards the third wall surface 473. The first end 491 abuts against the first guide surface 483 and moves along the first guide surface 483, causing the elastic fastener 49 to generate elastic force. When the first end 491 moves to the top of the first guide surface 483, it engages with the top corner 474 under the action of elastic force and springs into the concave position 482. The top of the second guide surface 484 is higher than the top of the first guide surface 483, which can limit the first end 491 from directly springing through the concave position 482. The tops of both the first guide surface 483 and the second guide surface 484 are at a distance from the third wall surface 473 to allow the first end 491 to pass through. To further guide the first end 491 into the recessed position 482, the third wall surface 473 extends to a apex 474. The first end 491 passes over the top of the first guide surface 483 and abuts against the apex 474, then slides down the apex 474 into the recessed position 482; or the first end 491 directly touches the third wall surface 473 and moves under the action of elasticity to abut against the apex 474, then slides down the apex 474 into the recessed position 482; when the first end 491 slides into the recessed position 482, it is in the locked state of the pedal 41. When the pedal is pressed again, the pedal 41 rotates, the first end 491 of the recessed position 482 moves towards the third wall surface 473, and under the action of elasticity, passes over the top of the second guide surface 484. After the first end 491 slides along the second guide surface 484 past the included angle position 485, the elastic fastener 49 returns to its original position, and the pedal 41 returns to its initial state.

[0043] The guide surface 481 includes a first guide surface 483 and a second guide surface 484. The first guide surface 483 and the second guide surface 484 are the two sides of the guide block 48. The bottom ends of the first guide surface 483 and the second guide surface 484 intersect to form an included angle 485. The top ends of the first guide surface 483 and the second guide surface 484 are spaced apart, and the recessed position 482 is located in the space. The first end 491 of the elastic fastener 49 in the released state is located at the position of the first guide surface 483. The cavity 47 has a first wall surface 471, a second wall surface 472 and a third wall surface 473. The first wall surface 471 faces the first guide surface 483, the second wall surface 472 faces the second guide surface 484, and the third wall surface 473 faces the recessed position 482. The third wall surface 473 extends to the guide block 48 with a apex angle 474, and the apex angle 474 extends into the recessed position 482. The distance between the first wall surface 471 and the first guide surface 483 is greater than the distance between the first end 491 and the second end 492, so that the first end 491 of the elastic buckle in the initial state is located at the position of the first guide surface 483, ensuring that when the stepping member 41 drives the elastic buckle 49 to move, the first end 491 slides on the first guide surface 483. The distance between the top end of the first guide surface 483 and the first wall surface 471 is less than the distance between the bottom end of the first guide surface 483 and the first wall surface 471. The first guide surface 483 has a bend 486, and the distance from the bend 486 to its top end is equal to the distance from the first wall surface 471, so that the elastic force remains constant when the first end 491 of the elastic fastener 49 moves to the bend 486. The third wall surface 473 extends a apex 474 from the guide block 48, and the apex 474 extends into the recess 482. The apex 474 does not contact the guide block 48 to reserve space for the first end 491 to slide through. The corners of the recess 47 have an arc to facilitate the sliding of the elastic fastener 49. The distance between the top end and bottom end of the second guide surface 484 and the second wall surface 472 gradually decreases.

[0044] The horizontal tube 45 is a hollow structure, and the accessory seat 43 is placed inside the horizontal tube 45. The accessory seat 43 has a movable cavity 431 to accommodate the pull cable seat 42 and the first spring 44. The movable cavity 431 has a latch 432 for the end of the brake cable 13 to be engaged. The brake cable 13 is connected to the pull cable seat 42 to drive the pull cable seat 42 to move within the movable cavity 431. The two ends of the first spring 44 abut against the pull cable seat 42 and the wall of the movable cavity 431 respectively to adjust the movement state of the pull cable seat 42. The pull cable seat 42 is reset by the first spring 44. The wall of the movable cavity 431 and the pull cable seat 42 are provided with protrusions 433 for the first spring 44 to be sleeved to limit the installation of the first spring 44 within the movable cavity 431. The horizontal tube 45 is provided with a coil spring 451. The two ends of the coil spring 451 are connected to the horizontal tube 45 and the pedal 41 respectively. The pedal 41 adjusts its rotational position relative to the horizontal tube 45 through the coil spring 451. The pedal 41 achieves position rebound through the coil spring 451, so that the first end 491 is kept in the concave position 482 or the included angle position 485.

[0045] The horizontal tube 45 is provided with a slot 452, which is elongated to cooperate with the movement of the protrusion 421. The pedal 41 is provided with a guide groove 411 and a slot 412. The slot 412 is provided at both ends of the pedal 41, and one end of the coil spring 451 is connected to the slot 412. The pull cable seat 42 is provided with a protrusion 421, which passes through the slot 452 and is connected to the guide groove 411. The rotating pedal 41 drives the protrusion 421 to move through the guide groove 411, thereby driving the pull cable seat 42 to move within the movable cavity 431. The pedal 41 has a guide groove 411, which is cylindrical. The guide groove 411 is arranged around the cylinder so that the first end 413 and the last end 414 of the guide groove 411 form a height difference. As the pedal 41 rotates, the guide groove 411 drives the protrusion 421 to move from its first end 413 to its last end 414. The moving protrusion 421 drives the cable holder 42 to move in the movable cavity 431. The first spring 44 in the movable cavity 431 adjusts the movement of the cable holder 42 to achieve the extension and retraction control of the brake cable 13. Furthermore, the guide groove 411 is provided with a deflection angle 415. The path segment A from the beginning end 413 to the deflection angle 415 is inclined, and the path segment B from the deflection angle 415 to the end end 414 is parallel. The angle formed by the path segment A from the beginning end 413 to the deflection angle 415 and the path segment B from the deflection angle 415 to the end end 414 is an obtuse angle. When the pedal 41 starts to rotate, the inclined path segment A facilitates the movement of the protrusion 421 from the beginning end 413. When it moves to the deflection angle 415, the parallel path segment B facilitates the rapid movement of the protrusion 421 to the end end 414. The parallel and inclined shapes are based on the plane in which the pedal 41 rotates. Parallel to the plane is considered parallel, and inclined to the plane is considered inclined. When the protrusion 421 is located at the beginning 413 of the guide groove 411, it is in the loosened state; when the protrusion 421 is located at the end 414 of the guide groove 411, it is in the locked state. In the loosened state, the spring compression connected to the cable holder 42 is minimal; in the locked state, the spring compression is maximum. The brake cable uses a conventional brake cable.

[0046] The follower plug assembly 6 includes a lower pressure seat 61, a top pressure block 62, and a plug-in rod 63. The plug-in rod 63 is connected to the lower pressure seat 61 through the top pressure block 62. The drive component 5 is provided with a first protruding tooth 51, and the lower pressure seat 61 is provided with a second protruding tooth 64. The first protruding tooth 51 is provided with a first pressing surface 511, and the second protruding tooth 64 is provided with a second pressing surface 641. The first protruding tooth 51 and the second protruding tooth 64 are connected so that the first pressing surface 511 and the second pressing surface 641 abut against each other. Both the first pressing surface 511 and the second pressing surface 641 are inclined surfaces. The drive component 5 rotates relative to the lower pressure seat 61, causing the first pressing surface 511 and the second pressing surface 641 to rotate and push, so that the drive component 5 and the lower pressure seat 61 move relative to each other, increasing or decreasing the distance between the drive component 5 and the lower pressure seat 61. The plug rod 63 is connected to the lower pressure seat 61 via the top pressure block 62. The moving lower pressure seat 61 inserts the plug rod 63 into the socket 81 via the top pressure block 62. The wheel arm 7 is provided with a slot 74 for the top pressure block 62 to enter. The slot 74 restricts the movement path of the top pressure block 62. The two ends of the top pressure block 62 are connected to the plug rod 63 and the lower pressure seat 61 respectively. The top pressure block 62 is pushed to move in the slot 74 by the plug rod 63 and the lower pressure seat 61.

[0047] The brake cable 13 is fastened to the drive component 5 and is wound around the drive component 5. The movable cable holder 42 pulls the drive component 5 to rotate through the brake cable 13. The drive component 5 is provided with a groove 53 to accommodate the wound brake cable 13 and a buckle 54 for the end of the brake cable 13 to be fastened.

[0048] Action flow: The elastic fastener 49 is a metal strip. The gap between the first end 491 and the second end 492 makes the elastic fastener 49 elastic. The treadle 41 has a pedal 416. The initial position of the first end 491 of the elastic fastener 49 is located at the included angle 485. When the pedal is first stepped on, the first end 491 moves against the first guide surface 483. The change in distance between the first end 491 and the second end 492 produces elastic deformation. When the first end 491 disengages from the guide block 48 and abuts against the third wall surface 473 as the treadle 41 rotates, the treadle 41 is restricted and stops rotating. The gap between the first end 491 and the second end 492 decreases due to the elastic force. The first end 491 slides back along the top corner 474 and falls into the concave position 482. At this time, the first end 491 is restricted by the concave position 482 and remains in the concave position 482.

[0049] The protrusion 421 of the pull cable holder 42 passes through the slot 452 of the horizontal tube 45 and connects to the guide groove 411 of the pedal 41, so that the pedal 41 and the pull cable holder 42 are linked. When the first end 491 is at the included angle 485, the protrusion 421 is located at the first end 413 of the guide groove 411. As the pedal 41 rotates, the protrusion 421 moves from the first end 413 to the end 414 of the guide groove 411. The pull cable holder 42 moves along the movable cavity 431 to compress the first spring 44. At this time, the pull cable holder 42 pulls the brake cable 13 to retract. The brake cable 13 is wound around the drive member 5. The retracted brake cable 13 pulls the drive member 5 to rotate. The first tooth 5 of the drive member 5 1 engages with the second protruding tooth 64 of the lower pressure seat 61, and the first pressing surface 511 of the first protruding tooth 51 abuts against the second pressing surface 641 of the second protruding tooth 64. When the drive member 5 rotates, the first pressing surface 511 slides against the second pressing surface 641, causing the drive member 5 to move away from the lower pressure seat 61 and increase the distance between the drive member 5 and the lower pressure seat 61. The moving lower pressure seat 61 moves towards the top pressure block 62 and presses down the top pressure block 62. Since the top pressure block 62 is connected to the insertion rod 63, the insertion rod 63 will press down with the top pressure block 62, so that the end of the insertion rod 63 is inserted into the insertion port 81 of the roller, thereby restricting the rotation of the wheel body 8 and achieving a locked state, making it difficult for the wheel body frame 1 to move.

[0050] When unlocking, stepping on the pedal causes the pedal 41 to rotate, and the first end 491 located in the recessed position 482 moves towards the third wall surface 473. At the same time, under the action of elasticity, it moves towards the second guide surface 484. After disengaging from the recessed position 482, the first end 491 moves along the second guide surface 484 to reset to the included angle position 485. As the first end 491 of the recessed position 482 moves, the protrusion 421 moves from the end 414 back to the beginning 413 under the guidance of the rotating guide groove 411. The second spring 72 of the movable cavity 431 cooperates to push the pull cable seat 42 to reset. The second spring 72 of the guide groove 71 pushes the plug rod 63 to move upward. The top pressure block 62 moves upward with the plug rod 63 to push the lower pressure seat 61 to rotate and engage with the drive component 5, reducing the distance between the lower pressure seat 61 and the drive component 5, so that the end of the plug rod 63 disengages from the plug 81, and the wheel body 8 can rotate. The unlocked state is achieved, and the wheel frame 1 can move.

[0051] In the description of this specification, references to terms such as "an embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. Illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] Based on the above description of the structure and principle, those skilled in the art should understand that the present invention is not limited to the specific embodiments described above. Improvements and substitutions made using techniques known in the art based on the present invention all fall within the protection scope of the present invention and should be defined by the claims.

Claims

1. A brake structure for a children's stroller, characterized in that: It includes a wheel frame, a roller body, and a braking device. The roller body and the braking device are mounted on the wheel frame. The wheel frame moves by the rotation of the roller body. The braking device is connected to the roller body to control the movement of the roller body. The braking device includes a pedal assembly, a brake cable, a drive component, and a follower plug assembly. The brake cable is connected to the pedal assembly and the drive component respectively. The pedal assembly pulls the brake cable to drive the drive component to rotate relative to the follower plug assembly. The roller body is provided with a socket, and the follower plug group is pushed into the socket by the drive component to limit the rotation of the roller body; The pedal assembly includes a pedal pivot, a cable holder, a fitting holder, a first spring, and a cross tube. The pedal pivot has a cavity, and the cross tube passes through the cavity to allow the pedal pivot to rotate relative to the cross tube. The horizontal tube has a cavity and a guide block, with the guide block located inside the cavity. The guide block has a sliding surface and an inner recess. The pedal component has an elastic fastener, which has a first end and a second end, with a gap between the first end and the second end. The elastic fastener is connected to the pedal component through the second end. The pedal component drives the elastic fastener to engage with the guide block, so that the first end engages with the sliding surface to adjust the movement of the pedal component. The horizontal tube is connected to a brake cable, and the rotating horizontal tube pulls the brake cable to rotate the drive component. The guide surface includes a first guide surface and a second guide surface. The bottom ends of the first guide surface and the second guide surface intersect to form an angle. The top ends of the first guide surface and the second guide surface are spaced apart, and the concave part is located in the space. The cavity has a first wall, a second wall, and a third wall. The first wall faces the first guide surface, the second wall faces the second guide surface, and the third wall faces the concave position. The third wall extends a apex angle to the guide block, and the apex angle extends into the concave position. The follower plug assembly includes a lower pressure seat, a top pressure block, and a plug-in rod. The plug-in rod is connected to the lower pressure seat through the top pressure block. The drive component has a first protruding tooth, and the lower pressure seat has a second protruding tooth. The first protruding tooth has a first pressing surface, and the second protruding tooth has a second pressing surface. The first protruding tooth and the second protruding tooth engage to make the first pressing surface and the second pressing surface abut against each other. The drive component rotates relative to the lower pressure seat, causing the first pressing surface and the second pressing surface to rotate and push against each other, so that the drive component and the lower pressure seat move relative to each other. The brake cable is fastened to the drive component and wrapped around the drive component. The moving cable holder pulls the drive component to rotate through the brake cable. The roller body includes a wheel arm, a wheel body, and a pin shaft. The wheel body is hinged to the wheel arm via a pin shaft, and the pin shaft is installed on the wheel arm. The roller body is connected to the wheel body frame via the pin shaft. The wheel arm is provided with a guide groove, and the plug rod is placed in the guide groove so that the plug rod can move along the guide groove. A second spring is provided in the guide groove to abut against the plug rod, so as to control the connection state between the plug rod and the wheel body through the second spring.

2. The stroller brake structure according to claim 1, characterized in that: The horizontal tube is a hollow structure, and the accessory seat is placed inside the horizontal tube. The accessory seat has a movable cavity to accommodate the pull cable seat and the first spring. The brake cable is connected to the pull cable seat to drive the pull cable seat to move in the movable cavity. The two ends of the first spring abut against the pull cable seat and the wall of the movable cavity respectively to adjust the movement state of the pull cable seat.

3. The stroller brake structure according to claim 1, characterized in that: The horizontal tube is equipped with a coil spring, which is connected to the horizontal tube and the treadle. The treadle is adjusted in rotation relative to the horizontal tube by means of the coil spring.

4. The stroller brake structure according to claim 1, characterized in that: The horizontal tube is provided with a slot, and the tread mechanism is provided with a guide groove; the pull cable seat is provided with a protrusion, which passes through the slot and is connected to the guide groove. The rotating tread mechanism drives the protrusion to move through the guide groove, thereby moving the pull cable seat within the movable cavity.

5. The stroller brake structure according to claim 1, characterized in that: The wheel frame includes a front wheel frame and a rear wheel frame. Each of the front wheel frame and the rear wheel frame is independently equipped with a braking device and a roller body. The braking device is connected to control the movement state of the roller body to adjust the movement state of the wheel frame.

Images