Linkage brake mechanism and stroller

Abstract

The utility model discloses a linkage brake mechanism and a stroller. A first locking and unlocking mechanism and a second locking and unlocking mechanism are correspondingly configured to be independently used for linkage of brake and brake release of a first wheel and a second wheel respectively. Namely, a user can brake or unlock the first wheel and the second wheel only by operating the corresponding locking and unlocking mechanism, so that misoperation of the user can be effectively avoided, and safety and reliability in use are guaranteed; in addition, the first locking and unlocking mechanism and the second locking and unlocking mechanism are independent of each other, and have the advantage of being stable and reliable in structure.

Description

[Technical field]

[0001] The utility model relates to the technical field of baby carriages, in particular to a linkage brake mechanism and a baby carriage. [Background technology]

[0002] In the prior art, in order to achieve safe parking of baby strollers, the common method is to brake the wheels. The braking and release of many baby strollers are achieved by a driving pedal, which is generally pressed from the front to brake, and the pedal needs to be hooked with the foot to reset it when releasing the brake. However, the release method of hooking the foot upward has the defects of being weak and inconvenient, and it is also easy to scratch the operator's shoe surface or toes. Because of this, the operator will find such braking and unlocking operations troublesome, and is often reluctant to use the brakes when parking, which poses a potential danger to the child passengers.

[0003] In addition, Chinese patent CN96221321.7 discloses a wheel brake device for a stroller, wherein a wheel groove is provided on the wheel, a brake block is inserted in the wheel groove, and a wheel seat is connected to a wheel axle; a pedal is provided on the wheel seat, a spring is provided between the pedal and the wheel seat, and a spring is provided between the brake hook and the wheel seat; a one-way circulation groove is provided on the wall of the pedal, and a hook convex pin is inserted in the one-way circulation groove. After pressing the pedal once, it is released, so that the wheel is in a braking state, and after pressing the pedal once again, it is released, and the wheel is out of the brake. It can be seen that in the above scheme, the braking and brake release actions are both realized by the user operating the same pedal, that is, the pedal can be switched between braking and brake release by acting on it twice in succession. With this structural scheme, it has a high requirement for the spring provided between the pedal and the wheel seat, and the cooperation of the hook convex pin and the one-way circulation groove must also be reliable, otherwise the braking and brake release will be in an unstable state, so there is a certain safety hazard.

[0004] For this reason, the present invention is studied and proposed in view of the above-mentioned problems. [Contents of the utility model]

[0005] The utility model aims to overcome the deficiencies of the prior art and provides a linkage brake mechanism, which configures the first locking and unlocking mechanism and the second locking and unlocking mechanism to be respectively and independently used for linkage braking and releasing of the first wheel and the second wheel, that is, the user can brake or release the first wheel and the second wheel only by operating the corresponding locking and unlocking mechanism, which can effectively avoid the user's misoperation and ensure safe and reliable use, stable and reliable structure, and easy operation.

[0006] The utility model provides a child stroller which adopts the linkage brake mechanism, so that the child stroller has the characteristics of convenient operation and safe and reliable use.

[0007] The utility model is realized by the following technical solutions:

[0008] A linkage brake mechanism, comprising a first wheel frame 1 connected to a first wheel 11 and a second wheel frame 2 connected to a second wheel 21; a first brake nail 12 is slidably provided on the first wheel frame 1, and the first brake nail 12 has a braking position and a brake release position, a first brake hole 111 is provided on the first wheel 11, and when the first brake nail 12 is in the braking position, the locking end of the first brake nail 12 is inserted into the first brake hole 111; when the first brake nail 12 is in the brake release position, the locking end of the first brake nail 12 is disengaged from the first brake hole 111, and the first wheel frame 1 is also provided with a first locking and unlocking mechanism 13 for positioning the first brake nail 12 in the braking position or the brake release position; a second brake nail 22 is slidably provided on the second wheel frame 2, and the second brake nail 22 has a braking position and a brake release position, a second brake hole 211 is provided on the second wheel 21, and the second brake nail 22 is in the braking position When the first and second brake nails 22 are in the braking position, the locking end of the second brake nail 22 is disengaged from the second brake hole 211. The second wheel frame 2 is also provided with a second locking and unlocking mechanism 23 for positioning the second brake nail 22 in the braking position or the braking position; and also includes a linkage member 3 for linking the first locking and unlocking mechanism 13 with the second locking and unlocking mechanism 23 so that the first and second brake nails 12, 22 are in the braking position or the braking position at the same time; the first locking and unlocking mechanism 13 and the second locking and unlocking mechanism 23 are configured as follows: when the first locking and unlocking mechanism 13 or the second locking and unlocking mechanism 23 is operated so that the first and second brake nails 12, 22 are in the braking position at the same time, the second locking and unlocking mechanism 23 or the first locking and unlocking mechanism 13 is operated accordingly so that the first and second brake nails 12, 22 are in the braking position at the same time.

[0009] As described above, a linkage brake mechanism, the first locking and unlocking mechanism 13 includes a first locking and unlocking member 131 movably arranged on the first wheel frame 1 and a first protrusion 121 arranged on the first brake nail 12, the first locking and unlocking member 131 is provided with a first braking support position 132 and a first brake release support position 134 for cooperating with the first protrusion 121 to position the first brake nail 12 in the braking position and the brake release position respectively, the first locking and unlocking member 131 is provided with a first unlocking inclined surface 133 for cooperating with the first protrusion 121 to drive the first brake nail 12 to slide accordingly when the first locking and unlocking member 131 moves relative to the first wheel frame 1; the first locking and unlocking mechanism 13 also includes a first reset member 135 for driving the first brake nail 12 to elastically reset; the linkage member 3 is used to link the first locking and unlocking member 131 with the second locking and unlocking mechanism 23.

[0010] As described above, a linkage brake mechanism, the second locking and unlocking mechanism 23 includes a second locking and unlocking member 231 movably arranged on the second wheel frame 2 and a second protrusion 221 arranged on the second brake nail 22, the second locking and unlocking member 231 is provided with a second brake support position 232 and a second brake release support position 234 for cooperating with the second protrusion 221 to position the second brake nail 22 in the braking position and the brake release position respectively, and a second unlocking inclined surface 233 is provided on the second locking and unlocking member 231 and located between the second brake support position 232 and the second brake release support position 234 for cooperating with the second protrusion 221 to drive the second brake nail 22 to slide accordingly when the second locking and unlocking member 231 moves relative to the second wheel frame 2; the second locking and unlocking mechanism 23 also includes a second reset member 235 for driving the second brake nail 22 to elastically reset; the linkage member 3 is used to link the first locking and unlocking member 131 with the second locking and unlocking member 231.

[0011] As described above, in a linked brake mechanism, the first brake support position 132 is located above the first brake release support position 134, and the second brake support position 232 is located below the second brake release support position 234; the first locking and unlocking member 131 and the second locking and unlocking member 231 are configured as follows: when the second locking and unlocking member 231 is operated to slide downward relative to the second wheel frame 2 and the first locking and unlocking member 131 is linked to slide upward relative to the first wheel frame 1, the first brake nail 12 and the second brake nail 22 can be positioned in the braking position; when the first locking and unlocking member 131 is operated to slide downward relative to the first wheel frame 1 and the second locking and unlocking member 231 is linked to slide upward relative to the second wheel frame 2, the first brake nail 12 and the second brake nail 22 can be positioned in the brake release position.

[0012] In the linkage brake mechanism as described above, the first wheel frame 1 is provided with a first mounting groove 14 for the first locking and unlocking member 131 to slide and guide therein, and the second wheel frame 2 is provided with a second mounting groove 24 for the second locking and unlocking member 231 to slide and guide therein.

[0013] As described above, a linkage brake mechanism is provided, a first guide structure 15 is provided between the first wheel frame 1 and the first locking and unlocking member 131, the first guide structure 15 includes a first guide rod 151 provided on the first wheel frame 1 and a first strip hole 152 provided on the first locking and unlocking member 131 and for the first guide rod 151 to pass through and cooperate with; a second guide structure 25 is provided between the second wheel frame 2 and the second locking and unlocking member 231, the second guide structure 25 includes a second guide rod 251 provided on the second wheel frame 2 and a second strip hole 252 provided on the second locking and unlocking member 231 and for the second guide rod 251 to pass through and cooperate with.

[0014] In the linkage brake mechanism as described above, the first locking and unlocking member 131 is slidably disposed on the first wheel frame 1 and located on the inner side of the first wheel 11 , and the second locking and unlocking member 231 is slidably disposed on the second wheel frame 2 and located on the inner side of the second wheel 21 .

[0015] In the linkage brake mechanism as described above, the upper ends of the first locking and unlocking member 131 and the second locking and unlocking member 231 are both provided with operating ends.

[0016] In the linkage brake mechanism as described above, the linkage member 3 includes a sheath and a rope movably inserted into the sheath, and two ends of the rope are respectively connected to the first locking and unlocking mechanism 13 and the second locking and unlocking mechanism 23 .

[0017] The utility model also provides a child stroller, comprising a frame using the linkage brake mechanism as described above.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] 1. The utility model configures the first locking and unlocking mechanism and the second locking and unlocking mechanism to be respectively and independently used for linkage braking and releasing of the first wheel and the second wheel, that is, the user can brake or release the first wheel and the second wheel only by operating the corresponding locking and unlocking mechanism, which can effectively avoid the user's misoperation and ensure safe and reliable use. It is easy to use and has a stable and reliable structure.

[0020] 2. The structures of the first locking and unlocking mechanism and the second locking and unlocking mechanism in the present invention are basically the same, which can effectively reduce the mold opening cost.

[0021] 3. In the utility model, the first brake support position and the first brake release support position cooperate with the first protrusion respectively to position the first brake nail in the braking position and the brake release position respectively, and the second brake support position and the second brake release support position cooperate with the second protrusion respectively to position the second brake nail in the braking position and the brake release position respectively, thereby ensuring that the first brake nail and the second brake nail are stably and reliably in the corresponding braking position or the brake release position, ensuring normal braking and brake release.

[0022] 4. In the utility model, the first locking and unlocking member is located on the inner side of the first wheel, and the second locking and unlocking member is located on the inner side of the second wheel, which can reduce the probability of the first locking and unlocking member and the second locking and unlocking member being collided or interfered with by other foreign objects, extend their service life, and play a certain protective role.

Brief Description of the Drawings

[0023] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0024] Figure 1 It is a three-dimensional diagram of the utility model.

[0025] Figure 2 It is a structural schematic diagram of the utility model.

[0026] Figure 3 It is an exploded view of the first locking and unlocking mechanism in the utility model.

[0027] Figure 4 It is an exploded view of the second locking and unlocking mechanism in the utility model.

[0028] Figure 5 It is an exploded view of the utility model.

[0029] Figure 6 It is a schematic diagram of the state of the utility model when it is in a braking state.

[0030] Figure 7 It is a schematic diagram of the state of the utility model when it is in the brake release state.

[0031] Figure 8 This is a three-dimensional diagram of the utility model linkage brake mechanism when applied to a child stroller. [Specific implementation method]

[0032] The following is combined with Figure 1-8 The implementation modes of the present utility model are described in detail.

[0033] like Figure 1-7As shown, the utility model provides a linkage brake mechanism, comprising a first wheel frame 1 connected to a first wheel 11 and a second wheel frame 2 connected to a second wheel 21; a first brake nail 12 is slidably provided on the first wheel frame 1, and the first brake nail 12 has a braking position and a brake release position, a first brake hole 111 is provided on the first wheel 11, and when the first brake nail 12 is in the braking position, the locking end of the first brake nail 12 is inserted into the first brake hole 111; when the first brake nail 12 is in the brake release position, the locking end of the first brake nail 12 is disengaged from the first brake hole 111, and the first wheel frame 1 is also provided with a first locking and unlocking mechanism 13 for positioning the first brake nail 12 in the braking position or the brake release position; a second brake nail 22 is slidably provided on the second wheel frame 2, and the second brake nail 22 has a braking position and a brake release position, a second brake hole 211 is provided on the second wheel 21, and the second brake nail 22 is in When the brake is in the braking position, the locking end of the second brake nail 22 is inserted into the second brake hole 211; when the second brake nail 22 is in the brake release position, the locking end of the second brake nail 22 is separated from the second brake hole 211, and the second wheel frame 2 is also provided with a second locking and unlocking mechanism 23 for positioning the second brake nail 22 in the braking position or the brake release position; it also includes a linkage member 3 for linking the first locking and unlocking mechanism 13 with the second locking and unlocking mechanism 23 so that the first brake nail 12 and the second brake nail 22 are in the braking position or the brake release position at the same time; the first locking and unlocking mechanism 13 and the second locking and unlocking mechanism 23 are configured as follows: when the first locking and unlocking mechanism 13 or the second locking and unlocking mechanism 23 is operated to make the first brake nail 12 and the second brake nail 22 in the braking position at the same time, the second locking and unlocking mechanism 23 or the first locking and unlocking mechanism 13 is operated accordingly to make the first brake nail 12 and the second brake nail 22 in the brake release position at the same time. The utility model configures the first locking and unlocking mechanism and the second locking and unlocking mechanism respectively and independently for linkage braking and releasing of the first wheel and the second wheel, that is, the user can brake or release the first wheel or the second wheel only by operating the corresponding locking and unlocking mechanism, which can effectively avoid the user's misoperation and ensure safe and reliable use; in addition, the first locking and unlocking mechanism and the second locking and unlocking mechanism are mechanisms independently arranged, and have the characteristics of stable and reliable structure.

[0034] like Figure 1 , 2As shown in , 3 and 5, in order to better brake and release the first wheel, the first locking and unlocking mechanism 13 includes a first locking and unlocking member 131 movably arranged on the first wheel frame 1 and a first protrusion 121 arranged on the first brake nail 12, the first locking and unlocking member 131 is provided with a first braking support position 132 and a first brake release support position 134 for cooperating with the first protrusion 121 to position the first brake nail 12 at the braking position and the brake release position respectively, the first locking and unlocking member 131 is provided with a first unlocking inclined surface 133 for cooperating with the first protrusion 121 to drive the first brake nail 12 to slide accordingly when the first locking and unlocking member 131 moves relative to the first wheel frame 1; the first locking and unlocking mechanism 13 also includes a first reset member 135 for driving the first brake nail 12 to elastically reset; the linkage member 3 is used to link the first locking and unlocking member 131 with the second locking and unlocking mechanism 23. In order to release the brake better, the first protrusion 121 has a protruding inclined surface for cooperating with the first unlocking inclined surface 133, which is not shown in the figure. In order to improve the reset effect, the first reset member 135 is a spring or the like.

[0035] like Figure 1 , 2 As shown in , 4 and 5, in order to better brake and release the second wheel, the second locking and unlocking mechanism 23 includes a second locking and unlocking member 231 movably arranged on the second wheel frame 2 and a second protrusion 221 arranged on the second brake nail 22, the second locking and unlocking member 231 is provided with a second braking support position 232 and a second brake release support position 234 for cooperating with the second protrusion 221 to position the second brake nail 22 in the braking position and the brake release position respectively, and a second unlocking inclined surface 233 is provided on the second locking and unlocking member 231 and located between the second braking support position 232 and the second brake release support position 234, which is used to cooperate with the second protrusion 221 to drive the second brake nail 22 to slide accordingly when the second locking and unlocking member 231 moves relative to the second wheel frame 2; the second locking and unlocking mechanism 23 also includes a second reset member 235 for driving the second brake nail 22 to elastically reset; the linkage member 3 is used to link the first locking and unlocking member 131 with the second locking and unlocking member 231. In order to release the brake better, the second protrusion 221 has a protruding inclined surface for cooperating with the second unlocking inclined surface 233, which is not shown in the figure. In order to improve the reset effect, the second reset member 235 is a spring or the like.

[0036] For the convenience of operation, the first brake support position 132 is located above the first brake release support position 134, and the second brake support position 232 is located below the second brake release support position 234; the first locking and unlocking member 131 and the second locking and unlocking member 231 are configured as follows: when the second locking and unlocking member 231 is operated to slide downward relative to the second wheel frame 2 and the first locking and unlocking member 131 is linked to slide upward relative to the first wheel frame 1, the first brake nail 12 and the second brake nail 22 can be positioned in the braking position, such as Figure 6 When the first locking and unlocking member 131 is operated to slide downward relative to the first wheel frame 1 and the second locking and unlocking member 231 is linked to slide upward relative to the second wheel frame 2, the first brake nail 12 and the second brake nail 22 can be positioned in the brake release position, such as Figure 7 In some embodiments, the positions of the first locking and unlocking mechanism 13 and the second locking and unlocking mechanism 23 may also be swapped. The operating principle at this time is opposite to the above-mentioned operating principle, which will not be described again here.

[0037] like Figure 3 As shown, in order to make the structure more stable, the first wheel frame 1 is provided with a first mounting groove 14 for guiding the first locking and unlocking member 131 to slide therein, which can guide and limit the movement path of the first locking and unlocking member 131, ensuring that the first brake support position 132, the first unlocking slope 133, and the first brake release support position 134 of the first locking and unlocking member 131 are stably and reliably used in conjunction with the first protrusion 121, while also making the structure more compact.

[0038] like Figure 4 As shown, the second wheel frame 2 is provided with a second mounting groove 24 for guiding the second locking and unlocking member 231 to slide therein, which can guide and limit the movement path of the second locking and unlocking member 231, ensure that the second brake support position 232, the second unlocking slope 233, and the second brake release support position 234 of the second locking and unlocking member 231 are stably and reliably used in conjunction with the second protrusion 221, and at the same time, it can also make the structure more compact.

[0039] like Figure 3 As shown, a first guide structure 15 is provided between the first wheel frame 1 and the first locking and unlocking member 131. The first guide structure 15 includes a first guide rod 151 provided on the first wheel frame 1 and a first strip hole 152 provided on the first locking and unlocking member 131 and for the first guide rod 151 to pass through and cooperate with, and can guide and limit the movement path of the first locking and unlocking member 131. In this embodiment, when the first guide rod 151 abuts against the upper end of the first strip hole 152, the first brake release support position 134 is used in conjunction with the first protrusion 121; when the first guide rod 151 abuts against the lower end of the first strip hole 152, the first brake support position 132 is used in conjunction with the first protrusion 121.

[0040] like Figure 4 As shown, a second guide structure 25 is provided between the second wheel frame 2 and the second locking and unlocking member 231. The second guide structure 25 includes a second guide rod 251 provided on the second wheel frame 2 and a second strip hole 252 provided on the second locking and unlocking member 231 and for the second guide rod 251 to pass through and cooperate with, and can guide and limit the movement path of the second locking and unlocking member 231. In this embodiment, when the second guide rod 251 abuts against the upper end of the second strip hole 252, the second brake support position 232 is used in conjunction with the second protrusion 221; when the second guide rod 251 abuts against the lower end of the second strip hole 252, the second brake release support position 234 is used in conjunction with the second protrusion 221.

[0041] like Figure 1 As shown, the first locking and unlocking member 131 can be slidably disposed on the first wheel frame 1 and located on the inner side of the first wheel 11, and the second locking and unlocking member 231 can be slidably disposed on the second wheel frame 2 and on the inner side of the second wheel 21, which can reduce the probability of the first locking and unlocking member and the second locking and unlocking member being collided or interfered with by other foreign objects, extend their service life, and play a certain protective role.

[0042] like Figure 1-4 As shown, in order to facilitate the user's foot operation, the upper ends of the first locking and unlocking member 131 and the second locking and unlocking member 231 are both provided with operating ends. Furthermore, the upper part of the operating end has friction grooves for increasing friction, which effectively prevents the user's foot from slipping with the operating end.

[0043] like Figure 1-7 As shown, in order to reduce manufacturing costs and ensure smooth movement of the rope, the linkage member 3 includes a sheath and a rope movably inserted into the sheath, and both ends of the rope are respectively connected to the first locking and unlocking mechanism 13 and the second locking and unlocking mechanism 23.

[0044] like Figure 1-8 As shown, the utility model is a child stroller, comprising a frame using the linkage brake mechanism as described above. Since the child stroller adopts the linkage brake mechanism, the child stroller has the characteristics of easy operation and safety and reliability.

Claims

1. A linkage brake mechanism, characterized in that It comprises a first wheel frame (1) connected to a first wheel (11) and a second wheel frame (2) connected to a second wheel (21); A first brake nail (12) is slidably provided on the first wheel frame (1), and the first brake nail (12) has a braking position and a brake release position. A first brake hole (111) is provided on the first wheel (11), and when the first brake nail (12) is in the braking position, the locking end of the first brake nail (12) is inserted into the first brake hole (111); when the first brake nail (12) is in the brake release position, the locking end of the first brake nail (12) is separated from the first brake hole (111). The first wheel frame (1) is also provided with a first locking and unlocking mechanism (13) for positioning the first brake nail (12) in the braking position or the brake release position; A second brake nail (22) is slidably provided on the second wheel frame (2), the second brake nail (22) has a braking position and a brake release position, a second brake hole (211) is provided on the second wheel (21), and when the second brake nail (22) is in the braking position, the locking end of the second brake nail (22) is inserted into the second brake hole (211); When the second brake nail (22) is in the brake-release position, the locking end of the second brake nail (22) is disengaged from the second brake hole (211), and the second wheel frame (2) is also provided with a second locking and unlocking mechanism (23) for positioning the second brake nail (22) in the brake position or the brake-release position; It also includes a linkage member (3) for linking the first locking and unlocking mechanism (13) with the second locking and unlocking mechanism (23) so that the first brake nail (12) and the second brake nail (22) are simultaneously in a braking position or a brake-release position; The first locking and unlocking mechanism (13) and the second locking and unlocking mechanism (23) are configured such that when the first locking and unlocking mechanism (13) or the second locking and unlocking mechanism (23) is operated so that the first brake nail (12) and the second brake nail (22) are simultaneously in the braking position, the second locking and unlocking mechanism (23) or the first locking and unlocking mechanism (13) is correspondingly operated so that the first brake nail (12) and the second brake nail (22) are simultaneously in the brake releasing position.

2. A linkage brake mechanism according to claim 1, characterized in that The first locking and unlocking mechanism (13) comprises a first locking and unlocking member (131) movably arranged on the first wheel frame (1) and a first protrusion (121) arranged on the first brake nail (12); the first locking and unlocking member (131) is provided with a first brake support position (132) and a first brake release support position (134) for cooperating with the first protrusion (121) to position the first brake nail (12) at a braking position and a brake release position respectively; the first locking and unlocking member (131) is provided with a first brake support position (132) and a first brake release support position (134) for cooperating with the first protrusion (121) to position the first brake nail (12) at a braking position and a brake release position respectively; A first unlocking inclined surface (133) is provided between the first locking and unlocking member (132) and the first brake release support position (134) for cooperating with the first protrusion (121) to drive the first brake nail (12) to slide accordingly when the first locking and unlocking member (131) moves relative to the first wheel frame (1); the first locking and unlocking mechanism (13) also includes a first reset member (135) for driving the first brake nail (12) to elastically reset; the linkage member (3) is used to link the first locking and unlocking member (131) with the second locking and unlocking mechanism (23).

3. A linkage brake mechanism according to claim 2, characterized in that The second locking and unlocking mechanism (23) comprises a second locking and unlocking member (231) movably arranged on the second wheel frame (2) and a second protrusion (221) arranged on the second brake nail (22); the second locking and unlocking member (231) is provided with a second brake support position (232) and a second brake release support position (234) for cooperating with the second protrusion (221) to position the second brake nail (22) at a braking position and a brake release position respectively; the second locking and unlocking member (231) is provided with a second brake support position (232) and a second brake release support position (234) for cooperating with the second protrusion (221) to position the second brake nail (22) at a braking position and a brake release position respectively; A second unlocking inclined surface (233) is provided between the first locking and unlocking member (232) and the second brake release support position (234) for cooperating with the second protrusion (221) to drive the second brake nail (22) to slide accordingly when the second locking and unlocking member (231) moves relative to the second wheel frame (2); the second locking and unlocking mechanism (23) also includes a second reset member (235) for driving the second brake nail (22) to elastically reset; the linkage member (3) is used to link the first locking and unlocking member (131) with the second locking and unlocking member (231).

4. A linkage brake mechanism according to claim 3, characterized in that The first brake support position (132) is located above the first brake release support position (134), and the second brake support position (232) is located below the second brake release support position (234); the first locking and unlocking member (131) and the second locking and unlocking member (231) are configured such that: when the second locking and unlocking member (231) is operated to slide downward relative to the second wheel frame (2) and the first locking and unlocking member (131) is linked to slide upward relative to the first wheel frame (1), the first brake nail (12) and the second brake nail (22) can be positioned at the brake position; when the first locking and unlocking member (131) is operated to slide downward relative to the first wheel frame (1) and the second locking and unlocking member (231) is linked to slide upward relative to the second wheel frame (2), the first brake nail (12) and the second brake nail (22) can be positioned at the brake release position.

5. A linkage brake mechanism according to claim 3, characterized in that The first wheel frame (1) is provided with a first mounting groove (14) for the first locking and unlocking member (131) to slide and guide therein, and the second wheel frame (2) is provided with a second mounting groove (24) for the second locking and unlocking member (231) to slide and guide therein.

6. A linkage brake mechanism according to claim 5, characterized in that A first guide structure (15) is provided between the first wheel frame (1) and the first locking and unlocking member (131), and the first guide structure (15) comprises a first guide rod (151) provided on the first wheel frame (1) and a first strip-shaped hole (152) provided on the first locking and unlocking member (131) and for the first guide rod (151) to pass through and cooperate with; a second guide structure (25) is provided between the second wheel frame (2) and the second locking and unlocking member (231), and the second guide structure (25) comprises a second guide rod (251) provided on the second wheel frame (2) and a second strip-shaped hole (252) provided on the second locking and unlocking member (231) and for the second guide rod (251) to pass through and cooperate with.

7. A linkage brake mechanism according to claim 3, characterized in that The first locking and unlocking member (131) is slidably arranged on the first wheel frame (1) and is located inside the first wheel (11), and the second locking and unlocking member (231) is slidably arranged on the second wheel frame (2) and is located inside the second wheel (21).

8. A linkage brake mechanism according to claim 3, characterized in that The upper ends of the first locking and unlocking member (131) and the second locking and unlocking member (231) are both provided with operating ends.

9. A linkage brake mechanism according to claim 1, characterized in that The linkage member (3) comprises a sheath and a rope movably inserted into the sheath, and two ends of the rope are respectively connected to a first locking and unlocking mechanism (13) and a second locking and unlocking mechanism (23).

10. A baby stroller, characterized in that A vehicle frame comprising a linkage brake mechanism as claimed in any one of claims 1 to 9.

Images