Handlebar reversing mechanism of baby stroller

Abstract

The utility model provides a handle reversing mechanism of a baby stroller. The handle reversing mechanism comprises a handle, a double-lock unit and a steering joint unit. The handle is connected with the push handle, and a first limiting part is arranged on the handle; the two-lock unit comprises a wrench, a sliding piece and a reset spring, the wrench is slidably installed on the handle, a locking hole is formed in the outer wall of the wrench, the interior of the wrench is hollow, and a supporting part is arranged on the inner wall of the wrench; the sliding piece comprises a sliding body, an abutting part and a pressing part; the steering joint unit comprises a first joint seat and a locking block, and the first joint seat is fixedly connected with the handle and hinged to the bearing assembly; the sliding body abuts against the inner wall of the wrench, the pressing part stretches out of the locking hole, the sliding body can slide by a first section of distance till the abutting part is limited by the first limiting part, the locking block unlocks the second section, the handle and the first joint base rotate in the first direction, handle pushing reversing can be conducted, forward pushing and backward pushing can be met at the same time, and the use effect is good. In a narrow region, steering is not needed, and the pushing flexibility is high.

Description

Technical Field

[0001] This utility model relates to the field of baby stroller technology, and in particular to a baby stroller handle reversing mechanism. Background Technology

[0002] A baby stroller is not only a practical tool for going out, but also provides a comfortable environment for babies to rest and play, while promoting their physical and intellectual development. Therefore, a baby stroller needs to have both pushing and folding functions. Traditional baby strollers generally have a folding function, but they can only be pushed from one side. The push handle cannot simultaneously allow for forward and backward pushing, making turning difficult in confined spaces and limiting pushing flexibility. Furthermore, folding can only be done in one direction, making operation inconvenient. Utility Model Content

[0003] In view of this, the present invention proposes a handle reversing mechanism for a baby stroller to solve the technical problem mentioned in the background art that the push handle cannot simultaneously satisfy forward and backward pushing, can only push in one direction, and is relatively troublesome to turn in confined spaces, resulting in insufficient pushing flexibility.

[0004] The technical solution of this utility model is implemented as follows:

[0005] This utility model provides a handle reversing mechanism for a baby stroller, used to connect a load-bearing assembly and a push handle assembly. The handle reversing mechanism includes a handle, a double-locking unit, and a steering joint unit, wherein:

[0006] The handle is connected to the push handle, and a first limiting part is provided on the handle;

[0007] The double-lock unit includes a wrench, a slider, and a return spring. The wrench is slidably mounted on the handle, and its outer wall has a locking hole. The wrench is hollow inside and its inner wall has a support portion. The slider includes a sliding body, a contact portion, and a pressing portion. The contact portion and the pressing portion are respectively disposed at both ends of the sliding body. The contact portion is used to engage and limit the first limiting portion. The pressing portion is slidably mounted in the locking hole and protrudes from the locking hole. The pressing portion can be pressed into the locking hole under external force so that the contact portion is no longer limited by the first limiting portion.

[0008] The steering joint unit includes a first joint seat and a locking block. The first joint seat is fixedly connected to the handle and hinged to the load-bearing component. The locking block is slidably mounted on the first joint seat and is drivenly connected to the sliding member.

[0009] On the basis of the above technical scheme, preferably, the steering joint unit further comprises a first locking spring, an unlocking pull wire and a lock ring, the first locking spring is compressed between the lock block and the first joint seat to straighten the unlocking pull wire, and the unlocking pull wire is connected to the lock block and the sliding piece at two ends respectively; the lock ring is fixed on the bearing assembly and used for limiting with the lock block.

[0010] On the basis of the above technical scheme, preferably, the lock block is provided with a protruding part; an inner ring of the lock ring is provided with a second limiting part, and the second limiting part is used for limiting the protruding part.

[0011] On the basis of the above technical scheme, preferably, an inner ring of the lock ring is provided with a first guide part, and an end of the protruding part away from the second limiting part is in sliding connection with the first guide part in a guided mode.

[0012] On the basis of the above technical scheme, preferably, the steering joint unit further comprises a first reinforcing sheet, the first reinforcing sheet is inserted into the first joint seat, and the first reinforcing sheet is provided with an avoiding hole for avoiding the protruding part.

[0013] On the basis of the above technical scheme, preferably, the bearing assembly comprises a first frame, a second frame and two second joint seats, the second frame is rotationally connected with the first frame, and the two second joint seats are connected with the first frame.

[0014] The bearing assembly further comprises a reversing locking mechanism, the reversing locking mechanism is connected with the second joint seat and the second frame respectively, and is used for locking or unlocking the second joint seat and the second frame.

[0015] On the basis of the above technical scheme, preferably, the bearing assembly further comprises a second reinforcing sheet, the second reinforcing sheet is fixedly connected with the second frame and hingedly connected with the first frame, the second reinforcing sheet is provided with an arc-shaped groove, and an end of the arc-shaped groove is provided with a third limiting part in a direction away from the center of the circle.

[0016] The second joint seat is provided with a pushing groove.

[0017] The reversing locking mechanism comprises a driving plate, an unlocking push block and a sliding block, the driving plate is fixedly installed on the first joint base, the driving plate is provided with a cam groove, the cam groove comprises a far center segment and a near center segment which are connected in a smooth transition, the distance from the far center segment to the center of the first joint base is greater than the distance from the near center segment to the center of the first joint base, the unlocking push block is slidingly installed in the push groove, the unlocking push block is provided with a sliding column and a guide groove, the sliding column is slidingly installed in the cam groove, the sliding block is slidingly installed in the guide groove, the sliding block is provided with a limiting column, the limiting column is slidingly installed in the arc-shaped groove, and the unlocking push block is drivingly connected with the sliding block.

[0018] The reversing locking mechanism has the following two states:

[0019] In the locking state, the sliding column is located in the far center segment, and the limiting column is located in the third limiting part.

[0020] In the unlocking state, the sliding column is located in the near center segment, and the limiting column slides out of the third limiting part and is located in the arc-shaped groove.

[0021] On the basis of the above technical scheme, preferably, the reversing locking mechanism further comprises a second locking spring and an unlocking spring, the second locking spring is located between the unlocking push block and the sliding block, and the unlocking spring is located between the sliding block and the inner wall of the push groove.

[0022] On the basis of the above technical scheme, preferably, the minimum pushing force of the second locking spring is greater than the maximum pushing force of the unlocking spring.

[0023] The handle reversing mechanism and the installation method of the baby stroller have the following beneficial effects compared with the prior art:

[0024] (1) By abutting the sliding body against the inner wall of the wrench and extending the pressing part out of the locking hole, the sliding body can slide a first distance until the abutting part is limited by the first limiting part, the lock block is unlocked for a second time, the handle and the first joint base are rotated in a first direction, the handle reversing can be performed, and the forward pushing and the backward pushing can be simultaneously satisfied, and in a small space, the turning is not needed, and the pushing flexibility is high.

[0025] (2) In the unlocking state of the two-lock unit, the pressing part is pressed into the locking hole, the abutting part is no longer limited by the first limiting part, the sliding body can slide a second distance, the lock block is unlocked for a second time, in the state of being unlocked for a second time, the handle is rotated in a second direction, the second frame and the first frame are close to each other for folding operation, and the folding operation is the same when the baby stroller is pushed forward or backward, therefore, the folding can be performed in two directions, and the operation is more convenient.

[0026] (3) when the sliding piece moves a first distance away from the handlebar, one end of the protruding part slides to the end of the first guide part close to the inner side, and the other end of the protruding part is limited by the second limiting part, so that the protruding part can only rotate in the first direction and is limited in the second direction;

[0027] (4) when the push handle reversing operation is completed, the sliding column slides to the far center section of the cam groove, the limiting column is located in the third limiting part, the second joint seat and the second frame are locked, and the fixing during use is facilitated; when the handlebar rotates in the second direction in the unlocking state of the two-way lock unit, the sliding column slides to the near center section of the cam groove, the limiting column slides out of the third limiting part, the second joint seat and the second frame are unlocked, and the folding operation is facilitated;

[0028] (5) by means of the fact that the minimum pushing force of the second locking spring is greater than the maximum pushing force of the unlocking spring, after the second joint seat and the second frame are unlocked, the second reinforcing sheet can be unfolded without being in order, even if the unlocking push block is pressed down, the state will not be dead, and the reliability and stability of the device are improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0030] Figure 1 It is a structure schematic view of the handlebar reversing mechanism of the baby stroller in the embodiment of the present application.

[0031] Figure 2 It is an exploded view of the handlebar reversing mechanism in the embodiment of the present application.

[0032] Figure 3 It is an installation schematic view of the handlebar reversing mechanism, the push handle assembly and the bearing assembly in the embodiment of the present application.

[0033] Figure 4 It is a partial sectional view of the A part in the embodiment of the present application. Figure 3

[0034] Figure 5 It is an exploded view of the installation of the handlebar reversing mechanism, the push handle assembly and the bearing assembly in the embodiment of the present application.

[0035] Figure 6 ​Structure schematic view of the lock ring in the embodiment of the utility model;

[0036] Figure 7 Installation schematic view of the steering joint unit in the embodiment of the utility model;

[0037] Figure 8 Installation schematic view of the reversing locking mechanism and the second joint seat in the embodiment of the utility model;

[0038] Figure 9 Structure schematic of the second joint seat in the embodiment of the utility model;

[0039] Figure 10 Structure schematic view of the driving plate in the embodiment of the utility model;

[0040] Figure 11 Structure schematic view of the reversing locking mechanism in the embodiment of the utility model;

[0041] Figure 12 Connection schematic view of the second reinforcing sheet and the slide post in the embodiment of the utility model.

[0042] Mark explanation: 1-handle, 2-two way lock unit, 3-steering joint unit, 4-reversing locking mechanism;100-push handle assembly, 110-push rod, 120-connecting rod, 200-bearing assembly, 210-first frame, 220-second frame, 230-second joint seat, 231-push groove, 240-second reinforcing sheet, 241-arc-shaped groove, 242-third limiting part;

[0043] 11-first limiting part;

[0044] 21-sliding part, 211-sliding body, 212-abutting part, 213-pressing part, 214-receiving groove, 22-wrench, 221-locking hole, 222-supporting part, 23-return spring;

[0045] 31-first joint seat, 32-lock block, 321-protruding part, 33-first locking spring, 34-unlocking pull wire, 35-lock ring, 351-first guide part, 352-second limiting part, 36-first reinforcing sheet, 361-avoiding hole;

[0046] 41-driving plate, 411-cam groove, 4111-distal segment, 4112-proximal segment, 42-unlocking push block, 421-slide post, 422-guide groove, 43-sliding block, 431-limiting column, 44-second locking spring, 45-unlocking spring; DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0048] Referring to Figures 1-12 The utility model discloses a hand handle reversing mechanism of baby stroller, for connecting push handle assembly and bearing assembly,

[0049] The push handle assembly 100 includes a push rod 110 and two connecting rods 120, and the two connecting rods 120 are respectively connected with two ends of the push rod 110.

[0050] The bearing assembly 200 includes a first frame 210, a second frame 220 and two bearing joint units 230, the second frame 220 is rotationally connected with the first frame 210, the bearing joint unit 230 includes a second joint seat 230 and a lock block 32, the two second joint seats 230 are connected with the first frame 210, the second joint seat 230 is hinged with the first joint seat 31, the lock block 32 is slidingly installed on the first joint seat 31, and the lock block 32 is drivingly connected with the sliding part 21.

[0051] The hand handle reversing mechanism includes a hand handle 1, a two-way lock unit 2 and a steering joint unit 3, the hand handle 1 is connected with one end of the connecting rod 120 away from the push rod 110, and a first limiting part 11 is arranged on the hand handle 1.

[0052] The second lock unit 2 comprises a sliding piece 21, a wrench 22 and a reset spring 23; the wrench 22 is slidingly installed on the connecting rod 120, the outer wall of the wrench 22 is provided with a locking hole, the inside of the wrench 22 is hollow and the inner wall is provided with a supporting part 222; the sliding piece 21 slides between the first limiting part 11 and the end of the inner wall of the wrench 22, the first limiting part 11 can be formed by protruding inward along the inner wall of the handle 1; the sliding piece 21 comprises a sliding body 211, an abutting part 212 and a pressing part 213, the abutting part 212 and the pressing part 213 are respectively arranged at both ends of the sliding body 211, the abutting part 212 is formed by protruding in the opposite direction of the force direction of the pressing part 213, the inner wall of the pressing part 213 is excavated with a containing groove 214, the abutting part 212 is used for limiting with the first limiting part 11, the maximum distance of the abutting part 212 to the first limiting part 11 is 5mm (i.e. the first distance), the pressing part 213 is slidingly installed in the locking hole; the reset spring 23 is located between the supporting part 222 and the pressing part 213, the reset spring 23 is arranged in the containing groove 214, the containing groove 214 forms a guide, so that the pressing force of the pressing part 213 and the elastic force of the reset spring 23 are located on the same straight line;

[0053] The steering joint unit 3 comprises a first joint seat 31 and a lock block, the first joint seat 31 is connected with the handle 1;

[0054] In the locked state of the second lock unit 2, the sliding body 211 abuts against the inner wall of the wrench 22 and the pressing part 213 protrudes out of the locking hole, the abutting part 212 is limited by the first limiting part 11; in the case that the pressing part 213 is not subjected to external force, the sliding body 211 abuts against the inner wall of the wrench 22 due to the elastic force of the reset spring 23, the pressing part 213 protrudes out of the locking hole, at this time, the abutting part 212 is limited by the first limiting part 11, the maximum moving distance of the sliding body 211 is the first distance (5mm);

[0055] In the unlocked state of the second lock unit 2, the pressing part 213 is pressed into the locking hole, the abutting part 212 is no longer limited by the first limiting part 11. By applying external force to press the pressing part 213 into the locking hole, the abutting part 212 is lowered, at this time, the pressing part 213 and the locking hole maintain a nesting relationship, so that the second lock unit 2 is unlocked, the first limiting part 11 no longer limits the abutting part 212, the sliding body 211 can continue to move a second distance (5mm);

[0056] The two-way lock unit 2 has the following two states: in the locked state, the sliding piece 21 can be moved away from the handle 1 by a first distance, and when moved to the position, the lock block 32 unlocks the first section; in the unlocked state, the sliding piece 21 can continue to move away from the handle 1 by a second distance, and when moved to the position, the lock block 32 unlocks the second section;

[0057] In the state of unlocking the first section, the handle 1 and the first joint seat 31 are rotated in the first direction to perform the push handle reversing operation, and the first joint seat 31 is limited in the second direction opposite to the first direction; here, the first direction refers to the opposite rotation of the push rod 110, and is not only one of the clockwise or counterclockwise directions, for example, the forward pushing operation can be changed to the backward pushing operation, and the backward pushing operation can be changed to the forward pushing operation, and the rotation directions of the two reversing operations are both the first direction, but the rotation directions are different, so that the bidirectional reversing operation can be realized.

[0058] In the state of unlocking the second section, the handle 1 is rotated in the second direction, and the second frame 220 and the first frame 210 are close to each other to perform the folding operation.

[0059] The handle reversing mechanism of the baby stroller provided in the embodiment can realize the push handle reversing operation, and can simultaneously satisfy the forward pushing operation and the backward pushing operation, and in a small space, the reversing operation is not needed, and the pushing flexibility is high.

[0060] In the unlocked state of the two-way lock unit 2, the sliding piece 21 can continue to move away from the handle 1 by a second distance, and when moved to the position, the lock block 32 unlocks the second section, and in the state of unlocking the second section, the handle 1 is rotated in the second direction, and the second frame 220 and the first frame 210 are close to each other to perform the folding operation, and after the reversing operation is completed, the handle is reversely rotated to perform the folding operation, and the forward pushing operation or the backward pushing operation is the same, so that the folding operation can be performed in two directions, and the operation is more convenient.

[0061] In some embodiments, the turning joint unit 3 further comprises a first locking spring 33 compressed between the lock block 32 and the first joint seat 31 to straighten the unlocking pull wire 34, the unlocking pull wire 34 has two ends respectively connected to the lock block 32 and the sliding piece 21; the lock ring 35 is fixed on the second joint seat 230 and used to limit the lock block 32. When the sliding piece 21 is not subjected to external force, the pushing force of the first locking spring 33 makes the lock block 32 have a tendency to move away from the wrench 22, and the unlocking pull wire 34 is straightened. When the external force received by the sliding piece 21 is greater than the pushing force of the first locking spring 33, the sliding piece 21 can move. When the received external force disappears, the sliding piece 21 automatically resets.

[0062] In some embodiments, the lock block 32 is provided with a protruding part 321; the inner ring of the lock ring 35 is provided with a first guide part 351 and a second limiting part 2432, the second limiting part 2432 can limit the protruding part 321, the first guide part 351 is a plane intersecting the radial direction, and the minimum diameter of the second limiting part 2432 is greater than the diameter of the end of the first guide part 351 close to the inner side; when the sliding piece 21 moves a first distance away from the handle 1, one end of the protruding part 321 slides to the end of the first guide part 351 close to the inner side, and the other end of the protruding part 321 is limited by the second limiting part 2432, so that the protruding part 321 can only rotate in the first direction and is limited in the second direction, thereby making the first joint seat 31 and the sliding piece 21 only rotate in the first direction and be limited in the second direction; in the second distance state of unlocking of the lock block 32, the protruding part 321 slides to a position close to the center of the second joint seat 230, and the protruding part 321 is no longer limited by the second limiting part 2432, so that the sliding piece 21 and the second joint seat 230 can rotate in the second direction to realize the folding operation.

[0063] In some embodiments, the turning joint unit 3 further comprises a first reinforcing sheet 36 inserted into and fixed in the first joint seat 31, the first reinforcing sheet 36 is provided with an avoiding hole 361 for avoiding the protruding part 321, the protruding part 321 is located in the avoiding hole 361 and can slide along the avoiding hole 361, the length direction of the avoiding hole 361 is parallel to the diameter direction of the first joint seat 31, and the avoiding hole 361 can also guide the sliding of the protruding part 321.

[0064] In some embodiments, the handle reversing mechanism further comprises a reversing locking mechanism 4 connected with the second joint base 230 and the second frame 220 respectively, for locking the second joint base 230 and the second frame 220 when the push rod 110 completes the push handle reversing operation. By locking the second joint base 230 and the second frame 220 through the reversing locking mechanism 4 when the push rod 110 completes the push handle reversing operation, the second joint base 230 and the second frame 220 can be fixed during use, and will not be folded during pushing, thereby improving the reliability and stability of the device.

[0065] In some embodiments, the bearing assembly 200 further comprises a second reinforcing sheet 240 fixedly connected with the second frame 220 and hingedly connected with the first frame 210, wherein the second reinforcing sheet 240 is provided with an arc-shaped slot 241, one end of the arc-shaped slot 241 is provided with a third limiting portion 242 away from the center of the circle;

[0066] The second joint base 230 is provided with a pushing slot 231;

[0067] The reversing locking mechanism 4 comprises a driving plate 41, an unlocking push block 42, a sliding block 43, a second locking spring 44 and an unlocking spring 45. The driving plate 41 is fixedly installed on the first joint base 31, and is provided with a cam slot 411 including a far center segment 4111 and a near center segment 4112. The far center segment 4111 is a circular arc with a larger radius, and the near center segment 4112 is a circular arc with a smaller radius. The far center segment 4111 and the near center segment 4112 are smoothly connected. The unlocking push block 42 is slidingly installed in the pushing slot 231, and is provided with a sliding column 421 and a guide slot 422. The sliding column 421 is slidingly installed in the cam slot 411, and the sliding block 43 is slidingly installed in the guide slot 422. The sliding block 43 is provided with a limiting column 431 slidingly installed in the arc-shaped slot 241. The unlocking push block 42 is drivingly connected with the sliding block 43. The second locking spring 44 is located between the unlocking push block 42 and the sliding block 43, and the unlocking spring 45 is located between the sliding block 43 and the inner wall of the pushing slot 231.

[0068] When the push rod 110 completes the push handle reversing operation, the sliding column 421 slides to the far center segment 4111 of the cam slot 411, and the limiting column 431 is located in the third limiting portion 242, thereby locking the second joint base 230 and the second frame 220.

[0069] When the handle 1 rotates along the second direction when the two-way lock unit 2 is in the unlocked state, the slide column 421 slides to the near-center section 4112 of the cam groove 411, the limiting column 431 slides out of the third limiting part 242, and the second joint base 230 and the second frame 220 are unlocked.

[0070] The principle of the locking process of the second joint base 230 and the second frame 220 is as follows:

[0071] When the handle reversing mechanism of the baby stroller is normally used, the handle 1 can be pushed forward or backward, and at this time, the far-center section 4111 of the cam groove 411 always pushes against the slide column 421 on the unlocking push block 42, the unlocking push block 42 pushes the second locking spring 44, the second locking spring 44 pushes the slide block 43, the slide block 43 compresses the unlocking spring 45, at this time, the slide block 43 slides in the arc-shaped groove 241 to the direction away from the center of the circle, and is clamped in the third limiting part 242 of the second reinforcing sheet 240, and locking is formed.

[0072] The principle of the unlocking process of the second joint base 230 and the second frame 220 is as follows:

[0073] When the locking block 32 is unlocked to the second section, the handle 1 rotates along the second direction, at this time, the slide column 421 is located in the near-center section 4112 of the cam groove 411, the unlocking push block 42 and the second locking spring 44 are released, at this time, the unlocking spring 45 pushes the slide block 43 without resistance, at this time, the slide block 43 slides in the arc-shaped groove 241 to the direction close to the center of the circle, unlocking is formed, and the folding operation can be performed.

[0074] In some embodiments, the minimum pushing force of the second locking spring 44 is greater than the maximum pushing force of the unlocking spring 45. Through the minimum pushing force of the second locking spring 44 being greater than the maximum pushing force of the unlocking spring 45, after the second joint base 230 and the second frame 220 are unlocked, the second reinforcing sheet 240 can be unfolded without being pressed in sequence, even if the unlocking push block 42 is pressed, the state will not be dead, and the reliability and stability of the device are improved.

[0075] The working principle of the handle reversing mechanism of the baby stroller is as follows:

[0076] When the pressing part 213 is not pressed, the wrench 22 can only be pulled out by “about 5mm” in the first section, when the handle 1 is pulled out in the first section, the handle 1 can only be rotated in the first direction and cannot be rotated in the second direction, and the limiting is limited.

[0077] Pulling the wrench 22 through the unlocking pull wire 34 drives the lock block 32 to slide a first distance, and the push handle is automatically locked after being turned up to the opposite side, realizing the reversing of the handle 1. Pulling out the first distance does not unlock the second joint seat 230 and the second frame 220, and at this time the front and rear legs of the vehicle platform are still locked and safe.

[0078] Pressing the pressing part 213 and holding, and then pulling out the wrench 22 by a second distance, the lock block 32 is unlocked by a second distance, the push rod 110 is turned to a second direction while unlocking the second joint seat 230 and the second frame 220 (the unlocking and locking principles of the second joint seat 230 and the second frame 220 are described above), and continuing to turn the push rod 110, the second frame 220 and the first frame 210 are close to each other for folding operation.

[0079] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A handle reversing mechanism for a baby stroller, characterized in that, The handlebar reversing mechanism, used to connect the load-bearing assembly and the push handle assembly, includes a handlebar, a two-lock unit, and a steering joint unit, wherein: The handle is connected to the push handle, and a first limiting part is provided on the handle; The double-lock unit includes a wrench, a slider, and a return spring. The wrench is slidably mounted on the handle, and its outer wall has a locking hole. The wrench is hollow inside and its inner wall has a support portion. The slider includes a sliding body, a contact portion, and a pressing portion. The contact portion and the pressing portion are respectively disposed at both ends of the sliding body. The contact portion is used to engage and limit the first limiting portion. The pressing portion is slidably mounted in the locking hole and protrudes from the locking hole. The pressing portion can be pressed into the locking hole under external force so that the contact portion is no longer limited by the first limiting portion. The steering joint unit includes a first joint seat and a locking block. The first joint seat is fixedly connected to the handle and hinged to the load-bearing component. The locking block is slidably mounted on the first joint seat and is drivenly connected to the sliding member.

2. The handle reversing mechanism of the baby stroller as described in claim 1, characterized in that, The steering joint unit further includes a first locking spring, an unlocking cable, and a locking ring. The first locking spring is compressed between the locking block and the first joint seat to straighten the unlocking cable. The two ends of the unlocking cable are respectively connected to the locking block and the sliding member. The locking ring is fixed to the bearing assembly and is used to limit the movement between the locking block and the locking member.

3. The handle reversing mechanism of the baby stroller as described in claim 2, characterized in that, The lock block has a protrusion; the inner ring of the lock ring has a second limiting part, which is used to limit the protrusion.

4. The handle reversing mechanism of the baby stroller as described in claim 3, characterized in that, The inner ring of the locking ring is provided with a first guide portion, and the end of the protrusion away from the second limiting portion is slidably connected to the first guide portion.

5. The handle reversing mechanism of the baby stroller as described in claim 4, characterized in that, The steering joint unit also includes a first reinforcing plate, which is inserted into the first joint seat. The first reinforcing plate has a clearance hole for avoiding the protrusion.

6. The handle reversing mechanism of the baby stroller as described in any one of claims 1-5, characterized in that, The load-bearing component includes a first frame, a second frame, and two second joint seats. The second frame is rotatably connected to the first frame, and both second joint seats are connected to the first frame. It also includes a reversing locking mechanism, which is connected to the second joint seat and the second frame respectively, and is used to lock or unlock the second joint seat and the second frame.

7. The handle reversing mechanism of the baby stroller as described in claim 6, characterized in that, The load-bearing component further includes a second reinforcing plate, which is fixedly connected to the second frame and hinged to the first frame. The second reinforcing plate is provided with an arc-shaped groove, and one end of the arc-shaped groove is provided with a third limiting part in the direction away from the center. The second joint seat is provided with a push groove; The reversing locking mechanism includes a drive plate, an unlocking push block, and a slider. The drive plate is fixedly mounted on the first joint seat. The drive plate has a cam groove, which includes a distal segment and a proximal segment that are smoothly connected. The distance from the distal segment to the center of the first joint seat is greater than the distance from the proximal segment to the center of the first joint seat. The unlocking push block is slidably mounted in the push groove. The unlocking push block has a sliding post and a guide groove. The sliding post is slidably mounted in the cam groove. The slider is slidably mounted in the guide groove. The slider has a limiting post, which is slidably mounted in the arc-shaped groove. The unlocking push block is drivenly connected to the slider. The reversing locking mechanism has the following two states: In the locked state, the sliding column is located in the distal segment, and the limiting column is located in the third limiting part; In the unlocked state, the sliding column is located in the proximal section, and the limiting column slides out of the third limiting part and is located in the arc-shaped groove.

8. The handle reversing mechanism of the baby stroller as described in claim 7, characterized in that, The reversing locking mechanism further includes a second locking spring and an unlocking spring. The second locking spring is located between the unlocking push block and the slider, and the unlocking spring is located between the slider and the inner wall of the push groove.

9. The handle reversing mechanism of the baby stroller as described in claim 8, characterized in that, The minimum thrust of the second locking spring is greater than the maximum thrust of the unlocking spring.

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