Brake structure for baby stroller

Abstract

The utility model discloses a brake structure for a baby stroller, which adopts the technical scheme that when a brake treading part rotates under the action of external force and drives a brake mechanism to brake or unlock a wheel group, the brake treading part can automatically reset and lift, and particularly, the brake structure can be applied to the baby stroller. The brake treading part integrates the locking function and the unlocking function, when the brake treading part performs treading action at the initial position to achieve brake braking, the brake treading part can return to the original position, the brake treading part is treaded again to unlock brake braking, and the brake treading part returns to the initial position again. On the basis that the vamp contact requirement is eliminated, the technical effect of brake single-point control is achieved, daily use is facilitated, in conclusion, operation areas do not need to be distinguished through single-point interaction in the braking or unlocking process, brake interaction is concise, and the beneficial technical effects of being convenient to operate are achieved.

Description

Technical Field

[0001] This utility model relates to the field of infant and child product technology, and in particular to a brake structure for a baby stroller. Background Technology

[0002] As an essential item for infants and toddlers' daily outings, the safety and convenience of the braking system in strollers are always a core concern for users. Currently, most mainstream strollers on the market use mechanical brake pedals, locking or unlocking the wheels by stepping on them. However, traditional braking devices generally suffer from operational redundancy and inconvenient reset. During daily use of strollers, users still need to use their shoes to hook the pedal and release the brake in wet or muddy environments, leading to shoe damage and even operational errors. With increasing user demand for one-handed operation and contactless interaction, there is an urgent need for a technological solution that can automatically switch between braking and unlocking with a single action.

[0003] Existing technologies, exemplified by CN114802406A, propose a scheme for synchronous braking and unlocking of dual wheels through a linkage mechanism. Specifically, the first and second braking mechanisms are connected by a traction member; pressing one pedal locks both wheels, while pressing the other unlocks them. The locking and unlocking operations are performed in the same direction, avoiding the reverse pedaling action required in traditional technologies. However, while this technology partially solves the problem of the shoe upper contacting the pedals, it still suffers from a fragmented operational logic. In actual use, locking and unlocking actions must be performed separately at different locations (both pedals), requiring users to memorize the operating areas and potentially leading to misoperation in emergency situations.

[0004] In summary, existing technologies suffer from drawbacks such as complex braking interactions that require differentiation of operating areas. Users need to distinguish between the locking and unlocking pedal positions, and the operation process does not conform to the trend of single-point control in human-computer interaction. Utility Model Content

[0005] The main purpose of this invention is to propose a braking structure for baby strollers, which aims to solve the technical problem of complex braking interaction in existing technologies, requiring differentiation of operating areas.

[0006] To achieve the above objectives, this utility model proposes a braking structure for a baby stroller, comprising:

[0007] Wheel set;

[0008] Brake pedal part, the brake pedal part is rotatably set relative to the wheel assembly;

[0009] The braking mechanism is located between the wheel assembly and the brake pedal. The braking mechanism is rotatably arranged relative to the wheel assembly and the brake pedal. When the wheel assembly is unlocked, the braking mechanism locks the wheel assembly whenever the brake pedal is rotated by an external force. Correspondingly, when the wheel assembly is locked, the braking mechanism releases the lock on the wheel assembly whenever the brake pedal is rotated by an external force.

[0010] The reset mechanism automatically resets the brake pedal after it is rotated by an external force.

[0011] Furthermore, the brake pedal includes a first rotating seat and a pedal. The pedal is located on the side of the first rotating seat. When the pedal is subjected to an external force, the first rotating seat rotates relative to the wheel assembly along with the pedal.

[0012] Furthermore, the reset mechanism includes a first elastic element and a fixed structure disposed on the first rotating seat, wherein the first elastic element is at least partially mounted on the fixed structure.

[0013] Furthermore, the first elastic element is a torsion spring, and the fixing structure is a disc groove. The fixing structure includes a disc part and a wire part. When the torsion spring extends into the disc part, the end of the torsion spring extends into the wire part to form a limit.

[0014] Furthermore, the braking mechanism includes a second rotating seat and a brake pin. The second rotating seat is rotatably disposed relative to the wheel assembly, and the brake pin is movably disposed between the second rotating seat and the wheel assembly. Meanwhile, the second rotating seat is at least partially in contact with the brake pedal part. Whenever the brake pedal part is rotated by an external force, the second rotating seat rotates with the brake pedal part.

[0015] Furthermore, a second elastic element is provided between the brake pin and the wheel assembly to bring the brake pin into contact with the second rotating seat by means of elastic force.

[0016] Furthermore, the second rotating seat includes a driving high surface and a driving low surface that abut against the brake pin. When the brake pin abuts against the driving high surface, the brake pin resists the second elastic member and extends toward the wheel assembly to form a lock. When the brake pin abuts against the driving low surface, the brake pin is resisted by the second elastic member and disengages from the wheel assembly to form an unlock.

[0017] Furthermore, it also includes a fixed-point limiting mechanism, which fixes a specific rotation point of the braking mechanism. The fixed-point limiting mechanism includes a positioning tooth and a directional structure for guiding the movement of the positioning tooth. The positioning tooth moves within the range of the directional structure as the braking mechanism rotates. The positioning tooth is rotatably mounted on the braking mechanism. At the same time, the positioning tooth is located between the braking mechanism and the wheel assembly, and the directional structure is located on the wheel assembly.

[0018] Furthermore, the positioning tooth includes a first positioning angle and a second positioning angle, and the orientation structure includes an orientation track and a first impact angle and a second impact angle arranged opposite to each other. After the positioning tooth moves with the braking mechanism, during the movement of the positioning tooth along the orientation structure, the first positioning angle can abut against the first impact angle, and the second positioning angle can abut against the second impact angle.

[0019] Furthermore, the fixed-point limiting mechanism also includes a third elastic element for further adjusting the movement of the positioning teeth. The third elastic element is located between the braking mechanism and the wheel assembly, and stores elastic potential energy as the braking mechanism rotates.

[0020] This invention provides a solution where, when the brake pedal is rotated by an external force, driving the braking mechanism to brake or unlock the wheel assembly, the brake pedal automatically resets and lifts. Specifically, the brake pedal integrates locking and unlocking functions. When the brake pedal is pressed in its initial position, it achieves braking and then returns to its original position. Pressing the brake pedal again unlocks the braking, and the brake pedal returns to its initial position once more. This invention eliminates the need for contact with the shoe upper and achieves single-point brake control, making it convenient for daily use. In summary, this invention provides a simple and convenient braking interaction through single-point interaction without distinguishing operating areas. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is an exploded three-dimensional structural view of the present invention;

[0023] Figure 3 An exploded view of the three-dimensional structure of the brake pedal and the reset mechanism;

[0024] Figure 4 This is a three-dimensional structural diagram of the braking mechanism;

[0025] Figure 5 This is an exploded view of the three-dimensional structure of the braking mechanism;

[0026] Figure 6 This is a three-dimensional structural diagram of the second rotating seat;

[0027] Figure 7 A three-dimensional structural diagram of the brake pedal and the second rotating seat;

[0028] Figure 8 An exploded view of the three-dimensional structure of the wheel assembly;

[0029] Figure 9This is a schematic diagram of the planar structure of the wheel seat, the orientation structure, the third elastic element, and the positioning teeth;

[0030] Figure 10 This is a schematic diagram of the planar structure in which the positioning tooth is located at the first position of the orientation structure;

[0031] Figure 11 This is a schematic diagram of the planar structure in which the positioning tooth is located at the second position of the orientation structure;

[0032] Figure 12 This is a schematic diagram of the planar structure in which the positioning tooth is located at the third position of the orientation structure;

[0033] Figure 13 This is a schematic diagram of the planar structure in which the positioning tooth is located at the fourth position of the orientation structure;

[0034] Figure 14 This is a schematic diagram of the planar structure in which the positioning tooth is located at the fifth position of the orientation structure;

[0035] Figure 15 This is a schematic diagram of the planar structure in which the positioning tooth is located at the sixth position of the orientation structure;

[0036] Figure 16 An exploded view of the three-dimensional structure of the brake pedal and wheel assembly.

[0037] The above figures include the following reference numerals:

[0038] 1. Wheel assembly; 11. Wheel seat; 12. Wheel; 13. Limiting part; 131. First limiting wall; 132. Second limiting wall; 14. First end plate; 15. Brake lock hole; 2. Brake pedal; 21. First rotating seat; 211. First drive part; 22. Pedal; 23. Connecting piece; 231. Stop part; 232. Extension part; 24. Cover plate; 3. Braking mechanism; 31. Second rotating seat; 311. Drive high surface; 312. Drive low surface Surface; 313, Second drive unit; 314, Second end plate; 315, Synchronization point; 32, Brake pin; 4, Reset mechanism; 41, First elastic element; 42, Fixing structure; 421, Disc part; 422, Line part; 5, Fixed point limiting mechanism; 51, Positioning tooth; 511, First positioning angle; 512, Second positioning angle; 52, Orientation structure; 521, Orientation track; 522, First impact angle; 523, Second impact angle; 53, Third elastic element. Detailed Implementation

[0039] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0040] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0041] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0042] This utility model proposes a braking structure for baby strollers.

[0043] In this embodiment of the utility model, such as Figures 1 to 16 As shown, the braking structure includes a wheel assembly 1, a brake pedal 2 rotatably disposed relative to the wheel assembly 1, and a braking mechanism 3 disposed between the wheel assembly 1 and the brake pedal 2. The braking mechanism 3 is rotatably disposed relative to the wheel assembly 1 and the brake pedal 2. In the unlocked state of the wheel assembly 1, whenever the brake pedal 2 is rotated by an external force, the braking mechanism 3 locks the wheel assembly 1. Correspondingly, in the locked state of the wheel assembly 1, whenever the brake pedal 2 is rotated by an external force, the braking mechanism 3 releases the lock on the wheel assembly 1. In addition, it also includes a reset mechanism 4. After the brake pedal 2 is rotated by an external force, the reset mechanism 4 automatically resets the brake pedal 2. This utility model can automatically reset the brake pedal 2 while completing the braking or unlocking process of the wheel assembly 1 by operating the brake pedal 2, so as to form a single reciprocating cycle operation. The operation cycle logic of this utility model is simple and intuitive. When braking or unlocking is required, simply press the brake pedal 2.

[0044] It should be noted beforehand that the aforementioned brake pedal part 2 is the part that applies external force. In general use, it often requires a functional part for rotation and a functional part for pedaling force, namely the first rotating seat 21 and the pedal 22. However, in reality, the functional part for pedaling force is not a necessary component. Therefore, in some embodiments, the brake pedal part 2 only refers to the functional part for pedaling force, which is specifically represented by the first rotating seat 21. In addition, the aforementioned first rotating seat 21 and second rotating seat 31 can rotate together. From a cost perspective and considering the preferred specific structure from a mechanical structure standpoint, a first drive part 211 can be provided on the first rotating seat 21. A second driving part 313 is provided on the second rotating seat 31. When the first rotating seat 21 rotates so that the first driving part 211 abuts against the second driving part 313 of the second rotating seat 31, the first rotating seat 21 drives the second rotating seat 31 to rotate. The first driving part 211 and the second driving part 313 are respectively provided on the sides of the first rotating seat 21 and the second rotating seat 31. Preferably, the first driving part 211 and the second driving part 313 rotate in a face-to-face manner. When the plane of the first driving part 211 contacts the plane of the second driving part 313, the first driving part 211 begins to drive the second driving part 313 to rotate.

[0045] In some embodiments of this utility model, the brake pedal part 2 includes a first rotating seat 21 and a pedal 22. The pedal 22 is located on the side of the first rotating seat 21. After the pedal 22 is subjected to an external force, the first rotating seat 21 rotates relative to the wheel assembly 1 with the pedal 22.

[0046] Specifically, the reset mechanism 4 includes a first elastic element 41 and a fixing structure 42 disposed on the first rotating seat 21. The first elastic element 41 is at least partially mounted on the fixing structure 42. In this embodiment, the first rotating seat 21 performs a reset action by means of the elastic potential energy released by the first elastic element 41. The fixing structure 42 serves to accommodate the first elastic element 41 and limit the elastic distance of the first elastic element 41. In addition, the first rotating seat 21 is provided with a cover plate 24, which is used to restrict the first elastic element 41 to the fixing structure 42 and prevent it from falling out.

[0047] Furthermore, the first elastic element 41 is a torsion spring, and the fixing structure 42 is a disc groove. The fixing structure 42 includes a disc portion 421 and a wire portion 422. While the torsion spring extends into the disc portion 421, its end extends into the wire portion 422 to form a limit. Understandably, the disc portion 421 serves to accommodate the first elastic element 41 and limit its elastic distance, while the wire portion 422 fixes the end of the torsion spring. In some other embodiments of this utility model, the torsion spring can be equivalently replaced by elastic deformable components such as leaf springs, rubber bodies, or silicone bodies. What is an elastic deformable component? This is the prior art part, and will not be elaborated on. It is also worth mentioning that the function of the reset mechanism 4 is actually to rotate. When the brake pedal part 2 rotates, the reset mechanism 4 can make the brake pedal part 2 rotate. In addition to the rebound action, the rotation action can also be achieved by mechanical structure or electromagnetic action, such as by using counterweight, rack and pinion spring, electromagnet and other components. In actual production activities, the above-mentioned components can be used to adapt the present invention to obtain the reset mechanism 4 that achieves return through mechanical structure or electromagnetic action.

[0048] In some embodiments of this utility model, the braking mechanism 3 includes a second rotating seat 31 and a brake pin 32. The second rotating seat 31 is rotatably disposed relative to the wheel assembly 1, and the brake pin 32 is movably disposed between the second rotating seat 31 and the wheel assembly 1. Meanwhile, the second rotating seat 31 at least partially abuts against the brake pedal part 2. Whenever the brake pedal part 2 is rotated by an external force, the second rotating seat 31 rotates with the brake pedal part 2.

[0049] Specifically, a second elastic element (not shown) is provided between the brake pin 32 and the wheel assembly 1 for using elastic force to bring the brake pin 32 into contact with the second rotating seat 31. Under the influence of the second elastic element, the brake pin 32 will not extend toward the wheel assembly 1 before being driven by the second rotating seat 31.

[0050] More specifically, the second elastic element is a spring. Before the brake pin 32 is driven by the second rotating seat 31, the spring is in a normal extended state, and extends towards the wheel assembly 1 by resisting the brake pin 32 through its own elasticity. After the brake pin 32 is driven by the second rotating seat 31, the spring is in a compressed state, and the brake pin 32 extends into the wheel assembly 1 against the elasticity of the spring to achieve braking. In some other embodiments of this utility model, the second elastic element can also be replaced by common elastic components such as rubber, sponge, and elastic fiber to replace the spring. This is prior art and will not be described in detail.

[0051] Specifically, the second rotating seat 31 includes a driving high surface 311 and a driving low surface 312 that abut against the brake pin 32. As the second rotating seat 31 rotates, at different rotation time points, the driving high surface 311 and the driving low surface 312 abut against the second elastic member and cooperate with the second elastic member. When the brake pin 32 abuts against the driving high surface 311, the brake pin 32 resists the second elastic member and extends towards the wheel assembly 1 to form a lock. When the brake pin 32 abuts against the driving low surface 312, the brake pin 32 is resisted by the second elastic member and disengages from the wheel assembly 1 to form an unlock. More specifically, in order to make the cooperation between the brake pin 32 and the driving high surface 311 and the driving low surface 312 tighter, the transition part between the driving high surface 311 and the driving low surface 312 is set as an inclined surface. In this case, the brake pin 32 will move more smoothly between the driving high surface 311 and the driving low surface 312. Of course, it can be understood that the driving low surface 312 can also be set as an inclined surface to achieve this purpose.

[0052] In some embodiments of this utility model, a fixed-point limiting mechanism 5 is also included. The fixed-point limiting mechanism 5 fixes a specific rotation point of the braking mechanism 3. The fixed-point limiting mechanism 5 includes a positioning tooth 51 and a directional structure 52 for guiding the movement of the positioning tooth 51. The positioning tooth 51 moves within the range of the directional structure 52 as the braking mechanism 3 rotates. The positioning tooth 51 is rotatably mounted on the braking mechanism 3. At the same time, the positioning tooth 51 is located between the braking mechanism 3 and the wheel assembly 1, and the directional structure 52 is located on the wheel assembly 1.

[0053] Specifically, the positioning tooth 51 includes a first positioning angle 511 and a second positioning angle 512, and the orientation structure 52 includes an orientation track 521 and a first impact angle 522 and a second impact angle 523 arranged opposite to each other. After the positioning tooth 51 moves with the braking mechanism 3, during the movement of the positioning tooth 51 along the orientation structure 52, the first positioning angle 511 can abut against the first impact angle 522, and the second positioning angle 512 can abut against the second impact angle 523.

[0054] Specifically, the fixed-point limiting mechanism 5 also includes a third elastic element 53 for further adjusting the movement of the positioning tooth 51. The third elastic element 53 is located between the braking mechanism 3 and the wheel assembly 1, and the third elastic element 53 stores elastic potential energy as the braking mechanism 3 rotates. The specific adjustment of the positioning tooth 51 by the third elastic element 53 is explained as follows: When the first positioning angle 511 of the positioning tooth 51 collides with the first impact angle 522, the second rotating seat 31 is rotated by the third elastic element 53, and the positioning tooth 51 moves with the second rotating seat 31, so that the second positioning angle 512 abuts against the second impact angle 523. At this time, the aforementioned driving surface 311 abuts against the brake pin 32, and the wheel assembly 1 is braked. The working principle of this part will be explained in detail later. Here, it is only to point out the specific function of the third elastic element 53.

[0055] More specifically, the third elastic element 53 is a spring. The wheel assembly 1 and the second rotating seat 31 are respectively provided with a first end plate 14 and a second end plate 314 for placing the two ends of the spring. After the second rotating seat 31 rotates, the spring is compressed and stores elastic potential energy. After the rotation stops, the spring releases elastic potential energy to make the second rotating seat 31 rotate back, thereby affecting the movement of the positioning tooth 51. In some other embodiments of this utility model, the third elastic element 53 can also be replaced by common elastic components such as rubber, sponge, and elastic fiber. This is prior art and will not be described in detail.

[0056] Specifically, the angle range of the first positioning angle 511 and the second positioning angle 512 is limited to a right angle or an obtuse angle, and the angle range of the first impact angle 522 and the second impact angle 523 is limited to an acute angle. At the same time, the first positioning angle 511 and the second positioning angle 512 can be eccentrically rotated on the first impact angle 522 and the second impact angle 523, respectively. It can be understood that by limiting the angles of the first positioning angle 511 and the second positioning angle 512 so that the included angle formed on both sides is greater than the first impact angle 522 and the second impact angle 523, the first positioning angle 511 or the second positioning angle 512 can be effectively limited by the first impact angle 522 or the second impact angle 523 when the movement causes contact, which is beneficial to maintaining the stability of the positioning tooth 51 during the point movement process.

[0057] In some embodiments of this utility model, the wheel assembly 1 includes a wheel seat 11, a wheel 12, and a brake lock hole 15. The aforementioned first rotating seat 21, second rotating seat 31, and positioning tooth 51 are all movably connected to the wheel seat 11. The third elastic member 53 is disposed in the wheel seat 11, and the brake pin 32 extends into the brake lock hole 15 to brake the wheel assembly 1. This is the conventional configuration of the wheel assembly 1 of a baby stroller. This paragraph serves as a prior art description and is used in conjunction with the foregoing content for explanation.

[0058] In some embodiments of this utility model, the wheel assembly 1 is provided with a limiting part 13 for limiting the rotation angle of the first rotating seat 21. A connecting member 23 is provided between the first rotating seat 21 and the pedal 22. The connecting member 23 includes a stop part 231 and an extension part 232. When the stop part 231 abuts against the limiting part 13, the first rotating seat 21 stops moving. More specifically, the limiting part 13 includes a first limiting wall 131 and a second limiting wall 132. When the stop part 231 hits the first limiting wall 131 or the second limiting wall 132, the first rotating seat 21 stops moving. The first rotating seat 21 is restricted to rotate within a fixed angle range within the limiting part 13, so as to better realize the cyclic reciprocating operation of this utility model.

[0059] In some embodiments of this utility model, in order to achieve synchronous braking and unlocking on both sides of the baby stroller, synchronization points 315 can be set on both sides of the second rotating seat 31, and connecting lines (not shown) can be installed on the synchronization points 315 to make the movement of both sides synchronized. When the second rotating seat 31 rotates, the other side of the second rotating seat 31 rotates synchronously.

[0060] The following content serves as an explanation of the working principle of this utility model:

[0061] When the pedal 22 is pressed down by an external force (such as stepping on it or touching it with an object), the first rotating seat 21 will rotate. The first driving part 211 drives the second driving part 313, and the second rotating seat 31 rotates accordingly. The positioning tooth 51 moves from the starting point of the directional track 521 to the first impact angle 522. The brake pin 32 transitions from a state of contact with the driving lower surface 312 to the driving higher surface 311 through rotation, thereby extending the brake pin 32 into the brake lock hole 15 to form a brake. The corresponding internal workings of this utility model at this time are as follows: the first rotating seat 21... 1. Due to the action of the first elastic element 41, the pedal 22 returns to its original position, while the second rotating seat 31 begins to rotate due to the action of the third elastic element 53. During the rotation, the positioning tooth 51 moves from the first impact angle 522 to the second impact angle 523 and then stops. Since the positioning tooth 51 is stuck at the second impact angle 523, the second rotating seat 31 remains stationary, and at this time the brake pin 32 is located in the part of the drive high surface 311, and the present invention remains in a locked state. When the pedal 22 is pressed down again by external force, the first rotating seat 21 rotates again. The first drive unit 211 drives the second drive unit 313, causing the second rotating seat 31 to rotate. The positioning tooth 51 moves from the second impact angle 523 to the first impact angle 522, and the brake pin 32 transitions from abutting the drive high surface 311 to the drive low surface 312 through rotation. This releases the brake pin 32 from the brake lock hole 15. The corresponding internal workings of this invention are as follows: the first rotating seat 21 resets due to the action of the first elastic element 41, and the pedal 22 returns to its original position. Meanwhile, the second rotating seat 31, due to the action of the third elastic element 511... When the function of 3 begins to rotate, during the rotation, the positioning tooth 51 rotates around the second rotating seat 31 and moves from the position of the first impact angle 522 to the second impact angle 523, forming a rotation at the second impact angle 523. At this time, the positioning tooth 51 and the second impact angle 523 are no longer in a locked state. As the third elastic element 53 rebounds, the positioning tooth 51 returns to the starting position along the directional track 521, and at this time the brake pin 32 is located in the part of the driving low surface 312. The present invention is in an unlocked state, and at this time one cycle of the present invention is completed.

[0062] In addition, for ease of understanding, using Figures 10 to 15The main fixed-point states of the positioning tooth 51 are recorded for reference. Please refer to the attached figure for understanding the above text. At the end of a cycle, the positioning tooth 51 returns from the sixth position to the first position.

[0063] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A braking structure for a baby stroller, characterized in that, include: Wheel set; Brake pedal part, the brake pedal part is rotatably set relative to the wheel assembly; The braking mechanism is located between the wheel assembly and the brake pedal. The braking mechanism is rotatably arranged relative to the wheel assembly and the brake pedal. When the wheel assembly is unlocked, the braking mechanism locks the wheel assembly whenever the brake pedal is rotated by an external force. Correspondingly, when the wheel assembly is locked, the braking mechanism releases the lock on the wheel assembly whenever the brake pedal is rotated by an external force. The reset mechanism automatically resets the brake pedal after it is rotated by an external force.

2. The brake structure as described in claim 1, characterized in that: The brake pedal includes a first rotating seat and a pedal. The pedal is located on the side of the first rotating seat. When the pedal is subjected to an external force, the first rotating seat rotates relative to the wheel assembly along with the pedal.

3. The brake structure as described in claim 2, characterized in that: The reset mechanism includes a first elastic element and a fixed structure disposed on the first rotating seat, wherein the first elastic element is at least partially mounted on the fixed structure.

4. The brake structure as described in claim 3, characterized in that: The first elastic element is a torsion spring, and the fixing structure is a disc groove. The fixing structure includes a disc part and a wire part. When the torsion spring extends into the disc part, the end of the torsion spring extends into the wire part to form a limit.

5. The brake structure as described in claim 1, characterized in that: The braking mechanism includes a second rotating seat and a brake pin. The second rotating seat is rotatably disposed relative to the wheel assembly, and the brake pin is movably disposed between the second rotating seat and the wheel assembly. At the same time, the second rotating seat is at least partially in contact with the brake pedal part. Whenever the brake pedal part is rotated by an external force, the second rotating seat rotates with the brake pedal part.

6. The brake structure as described in claim 5, characterized in that: A second elastic element is provided between the brake pin and the wheel assembly to bring the brake pin into contact with the second rotating seat by means of elastic force.

7. The brake structure as described in claim 6, characterized in that: The second rotating seat includes a driving high surface and a driving low surface that abut against the brake pin. When the brake pin abuts against the driving high surface, the brake pin resists the second elastic member and extends toward the wheel assembly to form a lock. When the brake pin abuts against the driving low surface, the brake pin is resisted by the second elastic member and disengages from the wheel assembly to form an unlock.

8. The brake structure as described in claim 1, characterized in that: It also includes a fixed-point limiting mechanism, which fixes a specific rotation point of the braking mechanism. The fixed-point limiting mechanism includes a positioning tooth and a directional structure for guiding the movement of the positioning tooth. The positioning tooth moves within the range of the directional structure as the braking mechanism rotates. The positioning tooth is rotatably mounted on the braking mechanism. At the same time, the positioning tooth is located between the braking mechanism and the wheel assembly, and the directional structure is located on the wheel assembly.

9. The brake structure as described in claim 8, characterized in that: The positioning tooth includes a first positioning angle and a second positioning angle. The orientation structure includes an orientation track and a first impact angle and a second impact angle arranged opposite each other. After the positioning tooth moves with the braking mechanism, during the movement of the positioning tooth along the orientation structure, the first positioning angle can abut against the first impact angle, and the second positioning angle can abut against the second impact angle.

10. The brake structure as described in claim 8, characterized in that: The fixed-point limiting mechanism also includes a third elastic element for further adjusting the movement of the positioning teeth. The third elastic element is located between the braking mechanism and the wheel assembly, and stores elastic potential energy as the braking mechanism rotates.

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