Baby stroller

Abstract

The stroller comprises a stroller frame, the stroller frame comprises a front support, a rear support and a push rod, two of the front support, the rear support and the push rod are rotationally connected, the third one of the front support, the rear support and the push rod is rotationally connected with any one of the front support and the rear support, or the three of the front support, the rear support and the push rod are coaxially and rotationally connected; the stroller further comprises a first locking mechanism, and the first locking mechanism is arranged between the push rod and the rear support. When the stroller is in a folded state, the front support, the rear support and the push rod are close to each other, and the first locking mechanism is in a locked state, so that when the stroller is unfolded, the push rod drives the rear support to synchronously rotate in the direction away from the front support, the rear support cannot be close to the front support under the action of self gravity, and unfolding operation of the stroller is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of children's products, and in particular to a children's stroller. Background Art

[0002] Strollers provide great convenience for adults to take children out. To facilitate the carrying and storage of strollers, most strollers can be folded. The stroller frame of a stroller generally includes a front bracket, a rear bracket and a push rod that are rotatably connected to each other. In the prior art, when the stroller is unfolded from a folded state, the rear bracket is not easy to rotate in a direction away from the front bracket under the action of its own gravity, which makes the unfolding operation of the stroller inconvenient. Summary of the invention

[0003] The purpose of the present invention is to provide a child stroller which is easy to unfold and operate in view of the deficiencies in the prior art.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A baby stroller has an unfolded state and a folded state, the baby stroller comprises a stroller frame, the stroller frame comprises a front bracket, a rear bracket and a push rod, two of the front bracket, the rear bracket and the push rod are rotatably connected, the third is rotatably connected to any of the two, or the three are coaxially rotatably connected; the baby stroller also comprises a first locking mechanism, the first locking mechanism is arranged between the push rod and the rear bracket; when the baby stroller is in the folded state, the front bracket, the rear bracket and the push rod are close to each other, and the first locking mechanism is in a locked state, so that when the baby stroller is unfolded, the push rod drives the rear bracket to rotate synchronously in a direction away from the front bracket.

[0006] In some embodiments, when the child stroller is in the unfolded state, the first locking mechanism is in the unlocked state.

[0007] In some embodiments, when the stroller is folded from an unfolded state, the push rod rotates in a direction toward the rear support; when the push rod is rotated toward the rear support by a set angle or rotated to a position basically close to the rear support, the first locking mechanism is in a locked state.

[0008] In some embodiments, when the child stroller is unfolded from a folded state, the push rod and the rear bracket both rotate in a direction away from the front bracket, and the push rod rotates in a direction away from the rear bracket; when the rear bracket rotates to a set position, the push rod rotates in a direction away from the rear bracket to drive the first locking mechanism to automatically unlock.

[0009] In some embodiments, the first locking mechanism includes a first locking member movably disposed on one of the rear bracket and the push rod, and a second locking member disposed on the other and adapted to the first locking member; when the first locking mechanism is in a locked state, the first locking member cooperates with the second locking member; when the first locking mechanism is in an unlocked state, the first locking member is separated from the second locking member.

[0010] In some embodiments, the second locking member is a locking slot, and the first locking mechanism further includes a first elastic member, which is disposed against the first locking member to drive the first locking member to automatically move in a direction of being inserted into the locking slot.

[0011] In some embodiments, the child stroller also includes a second locking mechanism arranged between the front bracket and the rear bracket to lock the relative position between the two, and the second locking mechanism includes a third locking piece movably arranged between the front bracket and the rear bracket; when the second locking mechanism is in a locked state, the third locking piece cooperates with the front bracket and the rear bracket respectively; when the second locking mechanism is in an unlocked state, the third locking piece cooperates with one of the front bracket and the rear bracket and disengages from the other.

[0012] In some embodiments, when the second locking mechanism is in an unlocked state, the third locking member cooperates with the rear bracket, and the third locking member disengages from the front bracket; the first locking member can be slidably disposed on the third locking member, and the locking groove is disposed on the push rod.

[0013] In some embodiments, a push rod joint is fixedly provided at one end of the push rod, a front bracket joint is fixedly provided at one end of the front bracket, a rear bracket joint is fixedly provided at one end of the rear bracket, a column portion is fixedly provided on the push rod joint, the front bracket joint and the rear bracket joint are both sleeved on the column portion and can be rotatably provided around the column portion, and the locking groove is provided on the column portion and is concave inwardly from the outer circumference of the column portion;

[0014] When the first locking mechanism is in an unlocked state, the first locking member is disposed against the outer peripheral surface of the column portion.

[0015] In some embodiments, a locking portion is provided at one end of the first locking member, and when the first locking mechanism is in a locked state, the locking portion is inserted into the locking groove; when the first locking mechanism is in an unlocked state, the locking portion is disengaged from the locking groove;

[0016] The locking portion is provided with inclined surfaces at opposite sides, and the distance between the inclined surfaces at the two sides gradually increases from the outer end to the inner end of the locking portion;

[0017] From the bottom of the locking groove to the top of the locking groove, the distance between the two side walls of the locking groove gradually increases.

[0018] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: when the stroller of the present invention is in the folded state, the position between the push rod and the rear bracket is locked by the first locking mechanism, so that when the stroller is unfolded from the folded state and the push rod rotates in the direction away from the front bracket, the rear bracket can be driven to rotate in the direction away from the front bracket synchronously, so that the rear bracket will not be close to the front bracket under the action of its own gravity, making the unfolding operation of the stroller convenient and facilitating the use of the stroller. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attached Figure 1 is a three-dimensional schematic diagram of the child stroller of this embodiment in an unfolded state;

[0020] Attached Figure 2 is a schematic side view of the child stroller of this embodiment in an unfolded state;

[0021] Attached Figure 3 is a front view schematic diagram of the child stroller of this embodiment in an unfolded state;

[0022] Attached Figure 4 For attachment Figure 2 Schematic cross-sectional view along line AA (enlarged view);

[0023] Attached Figure 5 For attachment Figure 3 Schematic cross-sectional view along line AA (enlarged view);

[0024] Attached Figure 6 is a three-dimensional schematic diagram of the child stroller of this embodiment when switching between an unfolded state and a folded state;

[0025] Attached Figure 7 is a side view schematic diagram of the child stroller of this embodiment when switching between an unfolded state and a folded state;

[0026] Attached Figure 8 is a front view schematic diagram of the child stroller of this embodiment when switching between an unfolded state and a folded state;

[0027] Attached Fig. 9 For attachment Figure 8 Schematic cross-sectional view along line AA (enlarged view);

[0028] Attached Fig.10is a three-dimensional schematic diagram of the child stroller of this embodiment in a folded state;

[0029] Attached Fig.11 is a schematic side view of the child stroller of this embodiment in a folded state;

[0030] Attached Fig.12 is a front view schematic diagram of the child stroller of this embodiment in a folded state;

[0031] Attached Fig.13 For attachment Fig.12 Schematic cross-sectional view along line AA (enlarged view).

[0032] Among them: 11, front bracket; 111, front bracket joint; 12, rear bracket; 121, rear bracket joint; 13, push rod; 131, push rod joint; 132, upper push rod; 133, lower push rod; 134, column; 134a, locking groove; 21, first locking member; 211, locking portion; 211a, inclined surface; 22, first elastic member; 3, third locking member; 31, slide groove; 4, fourth locking member; 5, rotating shaft; 6, front wheel assembly; 7, rear wheel assembly. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] like Figures 1 to 13 As shown, the child stroller of the present invention has an unfolded state and a folded state, and includes a stroller frame having an unfolded state and a folded state, a front wheel assembly 6 arranged at the bottom front portion of the stroller frame, and a rear wheel assembly 7 arranged at the bottom rear portion of the stroller frame.

[0035] The cart frame includes a front bracket 11, a rear bracket 12 and a push rod 13. Two of the front bracket 11, the rear bracket 12 and the push rod 13 are rotatably connected, the third is rotatably connected to any of the two, or the three are coaxially rotatably connected. The front wheel assembly 6 is arranged at the lower part of the front bracket 11, and the rear wheel assembly 7 is arranged at the lower part of the rear bracket 12.

[0036] In this embodiment, a front bracket joint 111 is fixedly provided at the upper end of the front bracket 11, a rear bracket joint 121 is fixedly provided at the upper end of the rear bracket 12, and a push rod joint 131 is fixedly provided at the lower end of the push rod 13. The front bracket joint 111, the rear bracket joint 121 and the push rod joint 131 are coaxially rotatably connected via a rotating shaft 5.

[0037] The push rod 13 can be a single rod. The push rod 13 can also be formed by a plurality of rods being sequentially rotated or slidably connected. This arrangement can reduce the structural volume of the folded stroller.

[0038] In this embodiment, the push rod 13 includes an upper push rod 132 and a lower push rod 133. The lower portion of the upper push rod 132 is rotatably connected to the upper portion of the lower push rod 133. The push rod joint 131 is fixedly arranged at the lower portion of the lower push rod 133.

[0039] When the stroller is in the unfolded state, the rear support 12 and the push rod 13 are both away from the front support 11, and the push rod 13 is away from the rear support 12. When the stroller is in the folded state, the rear support 12 and the push rod 13 are both close to the front support 11. When the stroller is folded from the unfolded state, the push rod 13 rotates downward, that is, in the direction of approaching the rear support 12, and the rear support 12 rotates forward, that is, in the direction of approaching the front support 11. When the stroller is unfolded from the folded state, the push rod 13 and the rear support 12 rotate backward, that is, in the direction away from the front support 11.

[0040] The stroller further includes a first locking mechanism, which is disposed between the push rod 13 and the rear bracket 12, and has a locked state and an unlocked state. When the first locking mechanism is in the locked state, the relative position between the push rod 13 and the rear bracket 12 is locked by the first locking mechanism, and the push rod 13 and the rear bracket 12 form a whole, and when the push rod 13 rotates relative to the front bracket 11, the rear bracket 12 can be driven to rotate synchronously relative to the front bracket 11. When the first locking mechanism is in the unlocked state, the push rod 13 and the rear bracket 12 can rotate relative to each other.

[0041] When the stroller is in the folded state, the first locking mechanism is in the locked state. Thus, when the stroller is unfolded from the folded state and the push rod 13 rotates backward away from the front bracket 11, the rear bracket 12 can be driven to rotate backward away from the front bracket 11 synchronously, so that the rear bracket 12 will not rotate forward and approach the front bracket 11 under its own gravity, which facilitates the unfolding operation of the stroller.

[0042] When the stroller is in the unfolded state, the first locking mechanism is in the unlocked state. When the stroller is folded from the unfolded state, in the initial process when the push rod 13 rotates downward to approach the rear support 12, the rear support 12 can remain stationary relative to the front support 11, so that during the rotation of the push rod 13, the front wheel assembly 6 and the rear wheel assembly 7 are both supported on the ground, which facilitates the folding operation of the stroller.

[0043] When the stroller is folded from the unfolded state, after the push rod 13 rotates a set angle, or when the push rod 13 rotates to a position substantially close to the rear bracket 12, the first locking mechanism can be locked. In this way, the push rod 13 and the rear bracket 12 form a whole, so that when either of them rotates forward to be close to the front bracket 11, the other can be driven to rotate forward synchronously to be close to the front bracket 11, which makes the folding operation of the stroller convenient. Preferably, when the push rod 13 rotates to a position substantially close to the rear bracket 12, the first locking mechanism is locked from the unlocked state.

[0044] When the stroller is unfolded from the folded state, after the push rod 13 drives the rear frame 12 to rotate to the set position, the first locking mechanism can be unlocked, so that the push rod 13 can rotate relative to the rear frame 12 until the push rod 13 rotates to the unfolded position. The set position means that a relatively large angle is formed between the rear frame 12 and the front frame 11, so that the front wheel assembly 6 and the rear wheel assembly 7 can be stably supported on the ground.

[0045] Preferably, the push rod 13 drives the rear bracket 12 to rotate to the position when the rear bracket 12 is in the unfolded state, so that the first locking mechanism is unlocked. That is, the above-mentioned set position is the position when the rear bracket 12 is in the unfolded state.

[0046] Moreover, in this embodiment, when the rear bracket 12 remains stationary and the push rod 13 continues to rotate in the previous direction, the first locking mechanism can be automatically unlocked, which makes the unlocking operation of the first locking mechanism convenient and simplifies the structure of the child stroller.

[0047] In other embodiments, an unlocking mechanism may also be separately provided to drive the first locking mechanism to unlock.

[0048] The first locking mechanism includes a first locking member 21 movably disposed on one of the rear bracket 12 and the push rod 13 and a second locking member disposed on the other and adapted to the first locking member 21. When the first locking mechanism is in a locked state, the first locking member 21 cooperates with the second locking member to lock the relative position between the push rod 13 and the rear bracket 12, so that the two cannot rotate relative to each other. Fig. 9 and Fig.13 When the first locking mechanism is in the unlocked state, the first locking member 21 is disengaged from the second locking member, and the push rod 13 can rotate relative to the rear bracket 12, as shown in FIG. Figure 5 shown.

[0049] Specifically, a locking portion 211 is provided at one end of the first locking member 21, and the second locking member is a locking groove 134a. When the first locking mechanism is in a locked state, the locking portion 211 is inserted into the locking groove 134a, such as Fig. 9 and Fig.13When the first locking mechanism is in the unlocked state, the locking portion 211 is disengaged from the lock groove 134a, as shown Figure 5 shown.

[0050] The locking part 211 is provided with inclined surfaces 211a on opposite sides thereof, and the distance between the inclined surfaces 211a on both sides gradually increases from the outer end to the inner end of the locking part 211. The outer end here refers to an end away from the center of the first locking member 21 in the length direction, and the inner end is arranged relative to the outer end, and refers to an end close to the center of the first locking member 21 in the length direction. The arrangement of the inclined surfaces 211a enables, when the first locking mechanism is in the locked state, one of the rear bracket 12 and the push rod 13 remains stationary, and a force is applied to the other to make the two rotate relative to each other, so that the first locking member 21 can automatically disengage from the locking groove 134a, so that the first locking mechanism is unlocked, so that the unlocking operation and unlocking structure of the first locking mechanism are very simple, and the structural volume of the child stroller can be reduced.

[0051] From the bottom of the locking groove 134a to the top of the groove, the distance between the two side walls of the locking groove 134a gradually increases, that is, the two side walls of the locking groove 134a are both inclined, so that it is easier to make the locking portion 211 escape from the locking groove 134a.

[0052] The first locking mechanism further includes a first elastic member 22 , which is disposed against the first locking member 21 . The elastic force of the first elastic member 22 drives the first locking member 21 to automatically move in a direction in which the locking portion 211 is inserted into the locking slot 134 a .

[0053] The specific structure of the first locking mechanism is not limited to the structure given in this embodiment, and other structures may also be used. For example, one of the first locking member and the second locking member is in the form of a hook, and the other is in the form of a hanging column. When the first locking mechanism is in a locked state, the hook is clamped on the hanging column. When the first locking mechanism is in an unlocked state, the hook is detached from the hanging column. The first locking structure may also be a magnetic structure, a buckle structure, a fixing rope or the like arranged between the push rod 13 and the rear bracket 12, as long as the push rod 13 and the rear bracket 12 can be fixed together when the child stroller is in a folded state, so that when the child stroller is unfolded, the push rod 13 and the rear bracket 12 can be moved together in a direction away from the front bracket first, so as to facilitate the unfolding operation of the child stroller.

[0054] The stroller further includes a second locking mechanism, which is disposed between the front bracket 11 and the rear bracket 12, and has a locked state and an unlocked state. When the second locking mechanism is in the locked state, the relative position between the front bracket 11 and the rear bracket 12 is locked by the second locking mechanism, so that the two cannot rotate relative to each other. When the second locking mechanism is in the unlocked state, the front bracket 11 and the rear bracket 12 can rotate relative to each other.

[0055] The second locking mechanism includes a third locking member 3 movably disposed between the front bracket 11 and the rear bracket 12. When the second locking mechanism is in a locked state, the third locking member 3 cooperates with the front bracket 11 and the rear bracket 12 respectively, thereby locking the position between the front bracket 11 and the rear bracket 12. Figure 4 When the second locking mechanism is in the unlocked state, the third locking member 3 cooperates with one of the front bracket 11 and the rear bracket 12 and disengages from the other.

[0056] Specifically, the outer periphery of the third locking member 3 may be provided with ratchet teeth, and the front bracket joint 111 and the rear bracket joint 121 are both provided with tooth grooves that match the ratchet teeth. When the second locking mechanism is in a locked state, the ratchet teeth of the third locking member 3 are respectively engaged with the tooth grooves on the front bracket joint 111 and the rear bracket joint 121. When the second locking mechanism is in an unlocked state, the ratchet teeth of the third locking member 3 are engaged with the tooth grooves on the front bracket joint 111 and are disengaged from the tooth grooves on the rear bracket joint 121; or, the ratchet teeth of the third locking member 3 are engaged with the tooth grooves on the rear bracket joint 121 and are disengaged from the tooth grooves on the front bracket joint 111.

[0057] In this embodiment, the third locking member 3 can be slidably arranged between the front bracket joint 111 and the rear bracket joint 121 along the axis of the rotating shaft 5. By sliding the third locking member 3 along the axis of the rotating shaft 5, the second locking mechanism is locked or unlocked.

[0058] When the second locking mechanism is in the unlocked state, the third locking member 3 cooperates with the rear bracket 12 and disengages from the front bracket 11. The third locking member 3 is provided with a slide groove 31, and the first locking member 21 can be slidably arranged in the slide groove 31 along the extension direction of the slide groove 31, and the sliding direction of the first locking member 21 is perpendicular to the sliding direction of the third locking member 3. The locking groove 134a is provided on the push rod 13.

[0059] Specifically, a column 134 is fixedly provided on the push rod joint 131, and the front bracket joint 111 and the rear bracket joint 121 are both sleeved on the column 134 and can be rotatably provided around the column 134. A locking groove 134a is provided on the column 134 and is recessed inward from the outer circumference of the column 134. When the first locking mechanism is in the unlocked state, the outer end of the locking portion 211 is released from the locking groove 134a and abuts against the outer circumference of the column 134.

[0060] The second locking mechanism further includes a second elastic member (not shown in the figure), one end of which is disposed on the third locking member 3, and in this embodiment, the other end of the second elastic member is disposed against the rear bracket joint 121. The elastic force of the second elastic member drives the third locking member 3 to automatically slide toward the direction close to the front bracket joint 111.

[0061] The stroller further includes a third locking mechanism, which is disposed between the front bracket 11 and the push rod 13, and has a locked state and an unlocked state. When the third locking mechanism is in the locked state, the relative position between the front bracket 11 and the push rod 13 is locked by the third locking mechanism, so that the two cannot rotate relative to each other. When the third locking mechanism is in the unlocked state, the front bracket 11 and the push rod 13 can rotate relative to each other.

[0062] The third locking mechanism includes a fourth locking member 4 movably disposed between the front bracket 11 and the push rod 13. When the third locking mechanism is in a locked state, the fourth locking member 4 cooperates with the front bracket 11 and the push rod 13, respectively, thereby locking the position between the front bracket 11 and the push rod 13. Figure 4 When the third locking mechanism is in the unlocked state, the fourth locking member 4 cooperates with one of the front bracket 11 and the push rod 13 and disengages from the other.

[0063] Specifically, as in the second locking mechanism, the outer periphery of the fourth locking member 4 may be provided with ratchets, and the front bracket joint 111 and the push rod joint 131 are both provided with tooth grooves that match the ratchets. When the third locking mechanism is in a locked state, the ratchets of the fourth locking member 4 are respectively engaged with the tooth grooves on the front bracket joint 111 and the push rod joint 131. When the third locking mechanism is in an unlocked state, the ratchets of the fourth locking member 4 are engaged with the tooth grooves on the front bracket joint 111 and are disengaged from the tooth grooves on the push rod joint 131; or, the ratchets of the fourth locking member 4 are engaged with the tooth grooves on the push rod joint 131 and are disengaged from the tooth grooves on the front bracket joint 111.

[0064] In this embodiment, the fourth locking member 4 can be slidably arranged between the front bracket joint 111 and the push rod joint 131 along the axis of the rotating shaft 5. By sliding the fourth locking member 4 along the axis of the rotating shaft 5, the third locking mechanism is locked or unlocked.

[0065] The third locking mechanism further includes a third elastic member (not shown in the figure), one end of which is arranged on the fourth locking member 4, and the other end of the third elastic member is abutted against the rear bracket joint 121 or the push rod joint 131. The elastic force of the third elastic member drives the fourth locking member 4 to automatically slide in the direction of putting the third locking mechanism in the locked state.

[0066] The child stroller may further include an unlocking mechanism. When the third locking mechanism is in a locked state, the unlocking mechanism can be driven to unlock the third locking mechanism. The unlocking mechanism may adopt a structure in the prior art.

[0067] The second locking mechanism can be unlocked from the locked state by the unlocking mechanism. A linkage mechanism can also be provided between the push rod 13 and the second locking mechanism, and when the push rod 13 rotates toward the direction of approaching the rear bracket 12 after the third locking mechanism is unlocked, the second locking mechanism is unlocked by the linkage mechanism, and the linkage mechanism can adopt the structure in the prior art.

[0068] When the stroller is in the unfolded state, the second locking mechanism and the third locking mechanism are both in the locked state, and the first locking mechanism is in the unlocked state. Figure 1 to Figure 5 shown.

[0069] When the stroller is folded, the upper push rod 132 is rotated to be close to the lower push rod 133. After the unlocking mechanism is operated to unlock the third locking mechanism, the push rod 13 is rotated downward as a whole to be close to the rear bracket 12. At this time, the rear bracket 12 remains stationary. During the rotation of the push rod 13, the first locking member 21 moves along the outer peripheral surface of the column 134. When the push rod 13 is rotated to a position close to the rear bracket 12, the locking portion 211 of the first locking member 21 faces the locking groove 134a. The first locking member 21 slides under the elastic force of the first elastic member 22, so that the locking portion 211 is inserted into the locking groove 134a, and the first locking mechanism is in a locked state. Figure 6 to Figure 9 At this time, the second locking mechanism is in an unlocked state.

[0070] Since the first locking mechanism is in the locked state, the rear bracket 12 and the push rod 13 form a whole, so that either the rear bracket 12 or the push rod 13 can rotate in the direction of approaching the front bracket 11, driving the other of the rear bracket 12 and the push rod 13 to rotate synchronously in the same direction. Until the front bracket 11, the rear bracket 12 and the push rod 13 are closely together, the child stroller is in the folded state. During this process, the first locking mechanism is always in the locked state, and finally the folded child stroller is folded. Figure 10 to Figure 13 shown.

[0071] When the stroller is unfolded from the folded state, the push rod 13 is rotated backward, that is, in a direction away from the front bracket 11, driving the rear bracket 12 to rotate synchronously in the same direction until the rear bracket 12 rotates to the unfolded position. At this time, the second locking mechanism is in a locked state, locking the relative position between the front bracket 11 and the rear bracket 12. When the push rod 13 continues to rotate in the previous direction, the first locking member 21 can be disengaged from the locking groove 134a, and the first locking mechanism is in an unlocked state, so that the push rod 13 can rotate relative to the rear bracket 12 and away from the rear bracket 12 until the push rod 13 rotates to the unfolded position. The upper push rod 132 is rotated in a direction away from the lower push rod 133, so that the stroller is in the unfolded state.

[0072] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A baby stroller, characterized in that: The stroller has an unfolded state and a folded state, and includes a stroller frame, the stroller frame includes a front bracket, a rear bracket and a push rod, two of the front bracket, the rear bracket and the push rod are rotatably connected, the third is rotatably connected to any of the two, or the three are coaxially rotatably connected; the stroller also includes a first locking mechanism, which is arranged between the push rod and the rear bracket; when the stroller is in the folded state, the front bracket, the rear bracket and the push rod are close to each other, and the first locking mechanism is in a locked state, so that when the stroller is unfolded, the push rod drives the rear bracket to rotate synchronously in a direction away from the front bracket.

2. The baby stroller according to claim 1, characterized in that: When the child stroller is in the unfolded state, the first locking mechanism is in the unlocked state.

3. The baby stroller according to claim 2, characterized in that: When the stroller is folded from the unfolded state, the push rod rotates in a direction close to the rear bracket; when the push rod rotates toward the rear bracket by a set angle or rotates to a position basically close to the rear bracket, the first locking mechanism is in a locked state.

4. The stroller according to claim 2, characterized in that: When the stroller is unfolded from a folded state, the push rod and the rear bracket both rotate in a direction away from the front bracket, and the push rod rotates in a direction away from the rear bracket; when the rear bracket rotates to a set position, the push rod rotates in a direction away from the rear bracket to drive the first locking mechanism to automatically unlock.

5. The stroller according to any one of claims 1 to 4, characterized in that: The first locking mechanism comprises a first locking member movably arranged on one of the rear bracket and the push rod, and a second locking member arranged on the other and adapted to the first locking member; When the first locking mechanism is in a locked state, the first locking piece cooperates with the second locking piece; when the first locking mechanism is in an unlocked state, the first locking piece is separated from the second locking piece.

6. The stroller according to claim 5, characterized in that: The second locking member is a locking slot, and the first locking mechanism further includes a first elastic member, which is disposed against the first locking member to drive the first locking member to automatically move in a direction of being inserted into the locking slot.

7. The stroller according to claim 6, characterized in that: The stroller further comprises a second locking mechanism disposed between the front support and the rear support to lock the relative position between the two, the second locking mechanism comprising a third locking member movably disposed between the front support and the rear support; When the second locking mechanism is in a locked state, the third locking member cooperates with the front bracket and the rear bracket respectively; When the second locking mechanism is in the unlocked state, the third locking member is engaged with one of the front bracket and the rear bracket and is disengaged from the other.

8. The stroller according to claim 7, characterized in that: When the second locking mechanism is in an unlocked state, the third locking piece cooperates with the rear bracket, and the third locking piece disengages from the front bracket; the first locking piece can be slidably arranged on the third locking piece, and the locking groove is arranged on the push rod.

9. The stroller according to claim 8, characterized in that: A push rod joint is fixedly provided at one end of the push rod, a front bracket joint is fixedly provided at one end of the front bracket, a rear bracket joint is fixedly provided at one end of the rear bracket, a column portion is fixedly provided on the push rod joint, the front bracket joint and the rear bracket joint are both sleeved on the column portion and can be rotatably provided around the column portion, and the locking groove is provided on the column portion and is concave inwardly from the outer circumference of the column portion; When the first locking mechanism is in an unlocked state, the first locking member is disposed against the outer peripheral surface of the column portion.

10. The baby stroller according to claim 6, characterized in that: A locking portion is provided at one end of the first locking member, and when the first locking mechanism is in a locked state, the locking portion is inserted into the locking groove; when the first locking mechanism is in an unlocked state, the locking portion is disengaged from the locking groove; The locking portion is provided with inclined surfaces at opposite sides, and the distance between the inclined surfaces at the two sides gradually increases from the outer end to the inner end of the locking portion; From the bottom of the locking groove to the top of the locking groove, the distance between the two side walls of the locking groove gradually increases.

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