Brake driving mechanism and stroller

Abstract

The utility model relates to the technical field of brake systems, and discloses a brake driving mechanism and a baby stroller, the driving mechanism comprises a mounting main body, a driving mechanism and a driving mechanism, the mounting main body is provided with a clamping structure; the brake pedal, the transmission connecting rod and the brake pin are all movably arranged on the mounting body, the transmission connecting rod is located between the brake pin and the brake pedal, and the brake pedal can drive the brake pin to do telescopic motion through the transmission connecting rod; wherein the brake pedal is provided with a brake position and a brake release position on the mounting main body, and the brake pedal can be switched between the brake position and the brake release position by treading down; the limiting gear is rotatably arranged on the brake pedal; when the brake pedal is stepped downwards to move to the brake position, the limiting gear is clamped to the clamping structure, and the brake pedal is kept at the brake position. The brake driving mechanism has the advantages that an existing brake driving mechanism is simplified, the whole structure is simple, the number of contained parts is small, assembling is convenient, and cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of brake systems, in particular to a brake driving mechanism and a child stroller. Background Art

[0002] The stroller is equipped with a brake system, which can brake the stroller to prevent it from rolling when parked.

[0003] Existing stroller brake systems typically involve pressing the brake pedal downward to activate the brake lock lever, and releasing the brake by lifting the brake pedal upward. This process can easily scratch or stain the operator's shoes. Consequently, brake systems have emerged on the market that require one foot to brake and another to release the brake. This means that both braking and releasing the brakes are achieved by pressing the brake pedal, without the need for lifting the foot. However, existing brake systems of this type have complex drive mechanisms and numerous components. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a driving mechanism for braking and a child stroller with a simple structure.

[0005] The technical solution adopted by the present invention to solve the technical problem is to propose a brake driving mechanism, comprising:

[0006] An installation body, wherein the installation body is provided with a clamping structure;

[0007] The brake pedal, the transmission connecting rod, and the brake pin are all movably arranged on the mounting body, and the transmission connecting rod is located between the brake pin and the brake pedal. The brake pedal can drive the brake pin to move telescopically via the transmission connecting rod. The brake pedal has a brake position and a release position on the mounting body, and pressing down the brake pedal can switch it between the brake position and the release position.

[0008] A limiting gear is rotatably provided on the brake pedal; when the brake pedal is stepped on to move to the brake position, the limiting gear is engaged with the clamping structure to keep the brake pedal in the brake position.

[0009] Furthermore, the limiting gear is arranged below the brake pedal, and a first return spring is provided at the lower end of the limiting gear, and the first return spring exerts an upward force on the limiting gear;

[0010] The brake pedal is provided with a first inclined surface, and the position-limiting gear is provided with a second inclined surface. The brake pedal can push the second inclined surface through the first inclined surface to rotate the position-limiting gear.

[0011] Furthermore, the clamping structure is configured as a clamping slot, and a third inclined surface is provided at the clamping slot;

[0012] When the second inclined surface abuts against the third inclined surface, the second inclined surface can slide along the third inclined surface, so that the limiting gear is locked in the locking groove.

[0013] Furthermore, the limiting gear is provided with a plurality of protruding teeth along its circumference, and the second inclined surface is located on the protruding teeth;

[0014] A plurality of limit grooves are provided on the mounting body. When the brake pedal is in the release position, the protruding teeth are arranged in the limit grooves so as to be movable up and down, and the limit grooves limit the rotation of the limit gears. When the brake pedal moves from the release position to the brake position, the protruding teeth disengage from the limit grooves and are locked in the clamping structure.

[0015] Furthermore, when the brake pedal is in the brake position, the brake pedal is depressed, and the brake pedal can push the limit gear through the first inclined surface, so that the protruding tooth disengages from the clamping structure, and the limit gear rotates and the first return spring is compressed; after releasing the brake pedal, the protruding tooth slides back into the limit groove, and the first return spring pushes the limit gear, so that the brake pedal is reset to the release position.

[0016] Furthermore, a boss protrudes downward from the bottom of the brake pedal, the limiting gear is rotatably mounted on the boss, and a plurality of protrusions protrude downward along the circumference of the boss on the brake pedal, and the first inclined surface is located on the protrusions.

[0017] Furthermore, a limit screw is detachably provided at the bottom of the brake pedal. When the brake pedal is in the brake-release position, the limit screw abuts against the mounting body to limit the upper limit position of the brake pedal.

[0018] A detachable bottom cover is provided on the mounting body, one end of the first return spring rests on the limit gear, and the other end of the first return spring rests on the bottom cover; when the bottom cover is removed from the mounting body, the limit gear can be installed into the mounting body or removed from the mounting body through the bottom cover.

[0019] Furthermore, the brake pedal is provided with a fourth inclined surface, one end of the transmission connecting rod is provided with a fifth inclined surface, and the other end of the transmission connecting rod is provided with a sixth inclined surface;

[0020] The fifth inclined surface movably counteracts the fourth inclined surface, and the sixth inclined surface movably counteracts the brake pin.

[0021] Furthermore, a second return spring is tensioned between the mounting body and the transmission connecting rod, and a third return spring is provided on the brake pin;

[0022] The top of the brake pin is provided with a seventh inclined surface and an eighth inclined surface adjacent to each other, and the inclination angle of the seventh inclined surface is greater than the inclination angle of the eighth inclined surface;

[0023] When the brake pedal is in the release position, the sixth inclined surface abuts against the seventh inclined surface, and when the brake pedal is depressed to move to the brake position, the sixth inclined surface detaches from the seventh inclined surface and abuts against the eighth inclined surface.

[0024] The technical solution adopted by the present invention to solve the technical problem is to provide a child stroller, which includes a front wheel group and a rear wheel group, and the front wheel group and / or the rear wheel group are equipped with the above-mentioned brake drive mechanism.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] In the present invention, the brake driving mechanism includes a mounting body, a brake pedal, a transmission connecting rod, a brake pin, and a limit gear. During use, when the brake pedal is in the release position, the brake pedal is stepped on, and the brake pedal drives the brake pin through the transmission connecting rod, so that the brake pin extends outward, thereby achieving the braking action, and the limit gear rotates and is clamped on the clamping structure on the mounting body, so that the brake pedal remains in the brake position. When the brake needs to be released, the brake pedal is stepped on, so that the limit gear is disengaged from the clamping structure, and the first return spring is compressed to release the brake pedal, and the brake pedal is reset to the release position. The function of braking once and releasing the brake once is realized, and the overall structure is simple, the number of components included is small, and the existing brake driving mechanism is simplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the driving mechanism of the brake of the utility model;

[0028] Figure 2 for Figure 1 Exploded diagram (the left side structure is omitted);

[0029] Figure 3 This is an exploded view of the installation of the main body, brake pedal and limit gear;

[0030] FIG4 is a cross-sectional view of the driving mechanism in the brake release state;

[0031] FIG5 is a cross-sectional view of the driving mechanism in a braking state;

[0032] FIG6 is a cross-sectional view of FIG5 with the brake pedal still pressed down;

[0033] Figure 7 Schematic diagram of the position of the limit gear on the brake pedal in different states;

[0034] Figure 8 Schematic diagram of the position of the limit gear on the mounting body in different states.

[0035] In the picture:

[0036] 1. Installation body; 10. Snap-fit ​​structure; 101. Third inclined surface; 11. Limiting groove; 12. Bottom cover; 13. Socket;

[0037] 2. Brake pedal; 20. Protrusion; 201. First inclined surface; 21. Boss; 22. Limit screw; 23. Fourth inclined surface;

[0038] 3. Transmission connecting rod; 30. Second return spring; 31. Fifth inclined surface; 32. Sixth inclined surface;

[0039] 4. Brake pin; 40. Third return spring; 41. Seventh inclined surface; 42. Eighth inclined surface;

[0040] 5. Limiting gear; 50. First return spring; 51. Protruding tooth; 510. Second inclined surface; 52. Connecting screw. DETAILED DESCRIPTION

[0041] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0042] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In addition, terms such as "first," "second," and "an" in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0044] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0045] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0046] like Figure 1 -As shown in Figure 6, a brake driving mechanism of this embodiment mainly includes: a mounting body 1, a brake pedal 2, a transmission connecting rod 3, a brake pin 4 and a limit gear 5.

[0047] The mounting body 1 is the mounting structure of the entire drive mechanism and can provide mounting locations for other components. When the drive mechanism is applied to the front wheel group or the rear wheel group on a child stroller, the mounting body 1 of this embodiment is a foot connecting seat, and a clamping structure 10 is provided on the mounting body 1. The clamping structure 10 in this embodiment is preferably configured as a clamping groove for the limit gear 5 to be clamped. In order to facilitate manufacturing or assembly, the mounting body 1 of this embodiment can be composed of multiple parts. For example, the mounting body 1 includes a bottom cover 12, and the bottom cover 12 is provided to facilitate the installation of the limit gear 5; the mounting body 1 includes a clamping seat 13 clamped thereto, and the brake pin 4 is arranged on the clamping seat 13 in a telescopic manner, and the clamping seat 13 is provided to facilitate the installation of the brake pin 4.

[0048] The brake pedal 2, transmission link 3, and brake pin 4 are all movably mounted on the mounting body 1, with the transmission link 3 positioned between the brake pin 4 and the brake pedal 2. The brake pedal 2 can drive the brake pin 4 to extend and retract via the transmission link 3. Specifically, the brake pedal 2 is mounted on the mounting body 1 so as to be movable. A fourth inclined surface 23 is provided near the side of the brake pedal 2. A fifth inclined surface 31 is provided at the end of the transmission link 3 near the brake pedal 2. A sixth inclined surface 32 is provided at the end of the transmission link 3 near the brake pin 4. The fifth inclined surface 31 of the transmission link 3 movably abuts against the fourth inclined surface 23 of the brake pedal 2, while the sixth inclined surface 32 of the transmission link 3 movably abuts against the brake pin 4. The brake pedal 2 compresses the fifth inclined surface 31 via the fourth inclined surface 23, causing the transmission link 3 to extend and retract. The transmission link 3 then compresses the brake pin 4 via the sixth inclined surface 32, causing the brake pin 4 to extend and retract. The extension and retraction of the brake pin 4 drives the brake components to brake and release. The brake pedal 2 has a braking position and a release position on the mounting body 1, and pressing the brake pedal 2 can switch it between the braking position and the release position. When the brake pedal 2 is in the release position, the brake pedal 2 is at the upper limit position on the mounting body 1. Specifically, a limit screw 22 is detachably provided at the bottom of the brake pedal 2. When the brake pedal 2 is in the release position, the limit screw 22 abuts against the mounting body 1, limiting the upper limit position of the brake pedal 2, that is, keeping the brake pedal 2 in the release position. When the brake pedal 2 is in the braking position, the limit gear 5 keeps the brake pedal 2 in the braking position.

[0049] The limiting gear 5 is rotatably mounted on the brake pedal 2. Specifically, a boss 21 protrudes downward from the bottom of the brake pedal 2, and the limiting gear 5 is rotatably mounted on the boss 21. A connecting screw 52 is threadedly connected to the boss 21, and the connecting screw 52 prevents the limiting gear 5 from being detached from the boss 21. During actual use, when the brake pedal 2 is in the release position and the brake pedal 2 is pressed down to move it to the braking position, the limiting gear 5 is engaged with the engaging structure 10, i.e., the engaging groove, so that the brake pedal 2 remains in the braking position. At this time, the brake pedal 2 cannot move upward to the release position because it is limited by the engaging fit between the limiting gear 5 and the engaging structure 10.

[0050] The limiting gear 5 is disposed below the brake pedal 2, and a first return spring 50 is disposed at the lower end of the limiting gear 5. One end of the first return spring 50 abuts against the bottom cover 12, and the other end of the first return spring 50 abuts against the limiting gear 5. When the bottom cover 12 is removed from the mounting body 1, the limiting gear 5 can be installed into or removed from the mounting body 1 through the bottom cover 12. The force exerted by the first return spring 50 on the limiting gear 5 is upward, that is, the first return spring 50 generates an upward thrust on the limiting gear 5. The brake pedal 2 is provided with a first bevel 201, and the limit gear 5 is provided with a second bevel 510. The brake pedal 2 can push against the second bevel 510 via the first bevel 201, causing the limit gear 5 to rotate. Since the brake pedal 2 can only move up and down and cannot rotate, the phase angle of its first bevel 201 does not change. When the second bevel 510 on the limit gear 5 abuts against the first bevel 201, and the first return spring 50 exerts an upward force on the limit gear 5, the second bevel 510 is forced to move along the first bevel 201, thereby driving the limit gear 5 to rotate. In this embodiment, the engaging structure 10 is configured as a slot, which is provided with a third bevel 101. When the second bevel 510 abuts the third bevel 101, the second bevel 510 slides along the third bevel 101, causing the limit gear 5 to be locked in the slot. At this point, the brake pedal 2 cannot be reset to the released position.

[0051] Specifically, the limit gear 5 of this embodiment is provided with a plurality of protruding teeth 51 along its circumference, with the second inclined surface 510 located on the protruding teeth 51. The accompanying drawings of this embodiment illustrate five protruding teeth 51, but the number is not limited to five. The mounting body 1 is provided with a plurality of limiting grooves 11. When the brake pedal 2 is in the released position, the protruding teeth 51 are arranged in the limiting grooves 11 for upward and downward movement. The limiting grooves 11 restrict the rotation of the limit gear 5. The limiting effect of the limiting grooves 11 ensures that the limit gear 5 cannot rotate when the brake pedal 2 is in the released position. When the brake pedal 2 is stepped on and moves from the release position to the brake position, the convex tooth 51 disengages from the first limiting groove 11. Since the second inclined surface 510 is attached to the first inclined surface 201 at this time, when the convex tooth 51 disengages from the limit groove 11, the limit gear 5 is no longer restricted in rotation by the limit groove 11, so the limit gear 5 will rotate, and the second inclined surface 510 is attached to the third inclined surface 101 of the mounting body 1. Since the first return spring 50 always pushes the limit gear 5 upward, the limit gear 5 will gradually be stuck into the clamping structure 10, i.e., the clamping groove, along the third inclined surface 101. When the limit gear 5 stops, the brake pedal 2 also stops and is restricted in the brake position and cannot be reset upward to the release position. Furthermore, when the brake pedal 2 is in the braking position, continue to press the brake pedal 2, and the brake pedal 2 can push the second inclined surface 510 on the limit gear 5 through the first inclined surface 201, so that the protruding tooth 51 disengages from the clamping structure 10, and the limit gear 5 rotates under the action of the first return spring 50 and the first inclined surface 201, and the first return spring 50 is compressed; after releasing the brake pedal 2, the protruding tooth 51 slides back into the limit groove 11, and the first return spring 50 pushes the limit gear 5, so that the brake pedal 2 is reset to the release position, and the brake pedal 2 is kept in the release position through the limit screw 22.

[0052] More specifically, the bottom of the brake pedal 2 of this embodiment has multiple protrusions 20 protruding downward along the circumference of the boss 21, and the first inclined surface 201 is located on the protrusions 20. A second return spring 30 is tensioned between the mounting body 1 and the transmission link 3, and the second return spring 30 can drive the transmission link 3 to reset. A third return spring 40 is provided on the brake pin 4, one end of the third return spring 40 abuts against the brake pin 4, and the other end of the third return spring 40 abuts against the retaining seat 13, which can drive the brake pin 4 to reset. The force of a single third return spring 40 is insufficient to simultaneously push the brake pin 4 and the transmission link 3 to reset, which can easily cause the brake pin 4 to get stuck. Therefore, in this embodiment, a second return spring 30 and a third return spring 40 are provided to act on the transmission link 3 and the brake pin 4, respectively, to ensure reliable reset and avoid getting stuck.

[0053] Preferably, the top of the brake pin 4 in this embodiment is provided with adjacent seventh and eighth inclined surfaces 41, 42, with the inclination angle of the seventh inclined surface 41 being greater than the inclination angle of the eighth inclined surface 42. When the brake pedal 2 is in the released position, the sixth inclined surface 32 abuts against the seventh inclined surface 41. When the brake pedal 2 is depressed to move it to the brake position, the sixth inclined surface 32 disengages from the seventh inclined surface 41 and abuts against the eighth inclined surface 42. In contrast, braking requires a longer travel of the brake pin 4, while releasing the brake requires a shorter travel. Therefore, the seventh and eighth inclined surfaces 41, 42, having different inclination angles, are provided. These requirements are achieved by the sixth inclined surface 32 cooperating with the seventh and eighth inclined surfaces 41, 42, respectively. Furthermore, the provision of the eighth inclined surface 42 saves space in the mounting body 1.

[0054] like Figure 7 The position of the limit gear 5 on the brake pedal 2 in different states is shown in FIG. Figure 8 The position of the limit gear 5 on the mounting body 1 in different states is shown in FIG4-FIG6: When the brake pedal 2 is in the release position, Figure 7 The first picture and Figure 8 In the position state of the first figure, the protruding tooth 51 of the limiting gear 5 is limited in the limiting groove 11, and the first inclined surface 201 is in contact with the second inclined surface 510. When the brake pedal 2 is stepped on and the brake pedal 2 is switched to the brake position, Figure 7 The second picture and Figure 8 In the second figure, the second inclined surface 510 is stuck in the slot and in contact with the third inclined surface 101. Figure 7 The third picture and Figure 8 In the position state of the third figure, the second inclined surface 510 is separated from the third inclined surface 101. When the brake pedal 2 is released, Figure 7 The fourth picture and Figure 8 In the position state of the fourth figure, the protruding tooth 51 is again engaged in the limiting groove 11, and the brake pedal 2 is kept in the release position.

[0055] The working principle of the brake driving mechanism of this embodiment is: during normal use, the driving mechanism does not brake, and the brake pedal 2 is in the release position. At this time, the protruding tooth 51 of the limit gear 5 is in the limit groove 11 of the mounting body 1, the second inclined surface 510 is in contact with the first inclined surface 201, and the limit screw 22 is against the mounting body 1, limiting the upper limit position of the brake pedal 2 (as shown in Figure 4). When braking is needed, the brake pedal 2 is stepped on, and the fourth inclined surface 23 on the brake pedal 2 pushes the fifth inclined surface 31, causing the transmission link 3 to move to the right. The transmission link 3 pushes the seventh inclined surface 41 of the brake pin 4 through the sixth inclined surface 32, causing the brake pin 4 to extend downward. The first return spring 50, the second return spring 30 and the third return spring 40 are all compressed. At the same time, the first inclined surface 201 forces the second inclined surface 510 to slide along it, and the limit gear 5 rotates. After releasing the brake pedal 2, the second inclined surface 510 will be stuck in the slot along the third inclined surface 101, so that the brake pedal 2 remains in the braking position and cannot be reset upward (as shown in Figure 5). When the brake needs to be released, the brake pedal 2 is continued to be depressed, and the brake pedal 2 causes the transmission connecting rod 3 and the brake pin 4 to have a small stroke, and the brake pedal 2 causes the protruding tooth 51 on the limit gear 5 to disengage from the engaging structure, i.e., the slot. The limit gear 5 rotates (as shown in FIG6 ). After the brake pedal 2 is released, the protruding tooth 51 slides into the limit slot 11, and the brake pedal 2 is reset to the brake release position, and the limit screw 22 limits its upper limit position.

[0056] This solution achieves the function of braking once and releasing the brakes once again, allowing for a cycle of braking and releasing without staining or scratching the user's shoe. The brake transmission mechanism has a simple overall structure and contains a small number of parts, simplifying the existing brake drive mechanism, making assembly easier and reducing costs.

[0057] When the brake drive mechanism of this embodiment is applied to a stroller, the stroller includes a front wheel set and a rear wheel set, and the brake drive mechanism of this embodiment is configured on the front wheel set and / or the rear wheel set. Two transmission connecting rods 3 and two brake pins 4 are symmetrically provided on the left and right sides of the brake pedal 2, realizing a dual-brake function with one step.

Claims

1. A brake drive mechanism, characterized in that: include: An installation body, wherein the installation body is provided with a clamping structure; The brake pedal, the transmission connecting rod, and the brake pin are all movably arranged on the mounting body, and the transmission connecting rod is located between the brake pin and the brake pedal. The brake pedal can drive the brake pin to move telescopically via the transmission connecting rod. The brake pedal has a brake position and a release position on the mounting body, and pressing down the brake pedal can switch it between the brake position and the release position. The limiting gear is rotatably arranged on the brake pedal; when the brake pedal is stepped on to move to the brake position, the limiting gear is clamped in the clamping structure to keep the brake pedal in the brake position.

2. The brake drive mechanism according to claim 1, characterized in that: The limiting gear is arranged below the brake pedal, and a first return spring is provided at the lower end of the limiting gear, and the first return spring exerts an upward force on the limiting gear; The brake pedal is provided with a first inclined surface, and the position-limiting gear is provided with a second inclined surface. The brake pedal can push the second inclined surface through the first inclined surface to rotate the position-limiting gear.

3. The brake driving mechanism according to claim 2, characterized in that: The clamping structure is configured as a clamping slot, and a third inclined surface is provided at the clamping slot; When the second inclined surface abuts against the third inclined surface, the second inclined surface can slide along the third inclined surface, so that the limiting gear is locked in the locking groove.

4. The brake driving mechanism according to claim 3, characterized in that: The limiting gear is provided with a plurality of protruding teeth along its circumference, and the second inclined surface is located on the protruding teeth; A plurality of limit grooves are provided on the mounting body. When the brake pedal is in the release position, the protruding teeth are arranged in the limit grooves so as to be movable up and down, and the limit grooves limit the rotation of the limit gears. When the brake pedal moves from the release position to the brake position, the protruding teeth disengage from the limit grooves and are locked in the clamping structure.

5. The brake driving mechanism according to claim 4, characterized in that: When the brake pedal is in the brake position, the brake pedal is depressed, and the brake pedal can push the limit gear through the first inclined surface, so that the protruding tooth disengages from the clamping structure, and the limit gear rotates and the first return spring is compressed; after releasing the brake pedal, the protruding tooth slides back into the limit groove, and the first return spring pushes the limit gear, so that the brake pedal is reset to the release position.

6. The brake drive mechanism according to any one of claims 2 to 5, characterized in that: A boss protrudes downward from the bottom of the brake pedal, and the limiting gear is rotatably mounted on the boss. A plurality of protrusions protrude downward along the circumference of the boss on the brake pedal, and the first inclined surface is located on the protrusions.

7. The brake driving mechanism according to claim 2, characterized in that: A limit screw is detachably provided at the bottom of the brake pedal. When the brake pedal is in the release position, the limit screw abuts against the mounting body to limit the upper limit position of the brake pedal. A detachable bottom cover is provided on the mounting body, one end of the first return spring rests on the limit gear, and the other end of the first return spring rests on the bottom cover; when the bottom cover is removed from the mounting body, the limit gear can be installed into the mounting body or removed from the mounting body through the bottom cover.

8. The brake driving mechanism according to claim 1, characterized in that: The brake pedal is provided with a fourth inclined surface, one end of the transmission connecting rod is provided with a fifth inclined surface, and the other end of the transmission connecting rod is provided with a sixth inclined surface; The fifth inclined surface movably counteracts the fourth inclined surface, and the sixth inclined surface movably counteracts the brake pin.

9. The brake driving mechanism according to claim 8, characterized in that: A second return spring is tensioned between the mounting body and the transmission connecting rod, and a third return spring is provided on the brake pin; The top of the brake pin is provided with a seventh inclined surface and an eighth inclined surface adjacent to each other, and the inclination angle of the seventh inclined surface is greater than the inclination angle of the eighth inclined surface; When the brake pedal is in the release position, the sixth inclined surface abuts against the seventh inclined surface, and when the brake pedal is depressed to move to the brake position, the sixth inclined surface detaches from the seventh inclined surface and abuts against the eighth inclined surface.

10. A baby stroller comprising a front wheel set and a rear wheel set, characterized in that: The front wheel assembly and / or the rear wheel assembly is provided with a brake drive mechanism as described in any one of claims 1-9.

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