A collapsible stroller

Abstract

The utility model relates to a kind of collapsible baby carriage, including frame main body and seat subassembly, frame main body includes foot rest group, handle group, first locking device, seat subassembly includes chair seat, backrest, second locking device and limiting mechanism, seat subassembly is equipped with rotating member, rotating member is connected with traction rope, rotating member and seat subassembly between being equipped with stop structure, stop structure can limit the rotation range of rotating member to make rotating member have first rotation stroke and second rotation stroke, when rotating member rotates in first rotation stroke, traction rope unlocks second locking device;When rotating member rotates in second rotation stroke, traction rope drives limiting mechanism to remove the restriction between chair seat and backrest to rotation angle;Seat subassembly and frame main body between still being equipped with first linkage mechanism.The setting of stop structure can avoid user in daily adjustment backrest angle due to misoperation and cause baby carriage to suddenly fold to lead to pinching or toppling, improve the security and reliability of use.

Description

Technical Field

[0001] This utility model relates to the field of children's vehicles, specifically a foldable children's vehicle. Background Technology

[0002] With the improvement of people's living standards, strollers have become an essential item for infants and toddlers. In current technology, strollers typically unlock the frame by operating a handle or button, thus folding the frame. Additionally, some strollers have adjustable backrest angles to accommodate children in different sitting, lying, and other postures.

[0003] However, the backrest angle adjustment function and the frame folding function of strollers are often controlled by separate mechanisms, which are cumbersome to operate. Users need to perform unlocking, adjustment, and folding actions separately, resulting in multiple steps, complex operation, and inconvenience. If the two functions are simply integrated into a control structure, it is easy to accidentally trigger the entire stroller's folding mechanism when only the backrest angle needs to be adjusted, causing inconvenience and even safety risks. Utility Model Content

[0004] The purpose of this utility model is to provide a foldable stroller that, through optimized structural design, achieves convenient operation of backrest adjustment and frame folding functions while ensuring safety.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a foldable stroller, including a frame body and a seat assembly. The frame body has a footrest assembly and a handlebar assembly that can move relative to each other. A first locking device is provided between the footrest assembly and the handlebar assembly. The seat assembly includes a seat and a backrest that can rotate relative to each other. A second locking device and a limiting mechanism for limiting the rotation angle between the seat and the backrest are provided between the seat and the backrest. The seat assembly is also rotatably connected to a rotating component. The rotating component is connected to a traction rope. A stop structure is provided between the rotating component and the seat assembly. The stop structure can limit the rotation range of the rotating component so that the rotating component can rotate in a first rotation stroke or release the restriction on the rotation range of the rotating component so that the rotating component can enter a second rotation stroke. When the rotating component rotates in the first rotation stroke, the traction rope unlocks the second locking device. When the rotating component rotates in the second rotation stroke, the traction rope unlocks the second locking device and drives the limiting mechanism to release the restriction on the rotation angle between the seat and the backrest. A first linkage mechanism is also provided between the seat assembly and the frame body, which can drive the first locking device to unlock when the backrest rotates to a preset angle.

[0006] As a further optimization of this utility model, the chair seat is provided with a chair seat rotating seat, the second locking device includes a first slot provided on the chair seat rotating seat, the backrest is provided with a first locking member, the first locking member extends into the first slot to restrict the relative rotation between the backrest and the chair seat rotating seat, and one end of the traction rope is connected to the first locking member for pulling the first locking member out of the first slot.

[0007] As a further optimization of this utility model, the limiting mechanism includes a limiting groove formed on the rotating seat of the chair, and the backrest is provided with a second locking member. The second locking member extends into the limiting groove in the limiting state and can slide along the length direction of the limiting groove.

[0008] As a further optimization of this utility model, a second linkage mechanism is provided between the first locking member and the second locking member, which enables the first locking member to drive the second locking member to disengage from the limiting groove when the rotating member rotates to the second rotation stroke.

[0009] As a further optimization of this utility model, the second linkage mechanism includes a linkage groove formed on one of the first locking member and the second locking member, and an extension portion extending into the linkage groove on the other one. When the rotating member rotates during the first rotation stroke, the extension portion slides in the linkage groove; when the rotating member rotates during the second rotation stroke, the extension portion slides to the end of the linkage groove and presses against the groove wall to push the second locking member to move.

[0010] As a further optimization of this utility model, the stop structure includes a first stop block disposed on the rotating member and capable of rotating with the rotating member, and a second stop block disposed on the seat assembly. The first stop block and the second stop block can move relative to each other so that they are aligned or staggered. When they are aligned, the second stop block is located on the rotation path of the first stop block and abuts against the first stop block when the rotating member rotates to a preset angle.

[0011] As a further optimization of this utility model, the rotating member is provided with a guide groove in the left-right direction, the first stop block has a guide portion extending into the guide groove, the guide portion is connected to an elastic member, and the elastic member pushes the first stop block so that the first stop block is aligned with the second stop block.

[0012] As a further optimization of this utility model, the seat assembly includes a mounting base detachably connected to the backrest, the mounting base having a mounting groove, the rotating member being rotatably connected in the mounting groove, and the second stop block being disposed on the mounting base.

[0013] As a further optimization of this utility model, the first locking device includes a handle rotating seat on the handle assembly and a tripod rotating seat on the tripod assembly and rotatably connected to the handle rotating seat. The handle rotating seat is provided with a second slot, and the tripod rotating seat is provided with a third slot. The handle rotating seat and the tripod rotating seat are provided with a third locking member. The third locking member can be inserted into the second slot and the third slot to restrict the relative rotation of the handle rotating seat and the tripod rotating seat.

[0014] As a further optimization of this utility model, the chair seat is provided with a chair seat rotating seat, and the backrest is provided with a backrest rotating seat rotatably connected to the chair seat rotating seat. The first linkage mechanism includes an unlocking component movably connected to the chair seat rotating seat. One end of the unlocking component abuts against a third locking component. The unlocking component is provided with a first inclined surface, and the backrest rotating seat is provided with a second inclined surface that cooperates with the first inclined surface. When the backrest rotates to a preset angle, the second inclined surface rotates with the backrest rotating seat and pushes the first inclined surface, causing the unlocking component to move outward and push the third locking component to disengage from the second or third slot.

[0015] Compared with existing technologies, this utility model has the following advantages: By setting a stop structure, the rotating part is placed in the first rotation stroke, realizing the angle adjustment of the backrest under the constraint of the limiting mechanism. When the stroller needs to be folded, the user must release the restriction of the stop structure on the rotating part, allowing the rotating part to enter the second rotation stroke. At this time, the traction rope further drives the limiting mechanism to release the rotation constraint on the backrest, allowing the backrest to rotate to the preset folding angle. The first linkage mechanism then triggers the unlocking of the first locking device of the frame, thereby completing the folding action of the entire stroller. The stop structure effectively avoids accidental activation of the folding mechanism due to user error when adjusting the backrest angle, reducing the safety risk of pinching or tipping caused by sudden folding of the stroller, and improving the safety and reliability of use. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0017] Figure 2 This is a three-dimensional schematic diagram of the seat assembly in this utility model;

[0018] Figure 3 This is an exploded view of the stop structure of this utility model;

[0019] Figure 4 This is an exploded view of the second locking device and the limiting mechanism in this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the rotating component, traction rope, second locking device, and limiting mechanism in this utility model.

[0021] Figure 6 This is a schematic diagram of the structure in which the first stop block and the second stop block are aligned.

[0022] Figure 7 This is a schematic diagram of the structure in which the first stop block and the second stop block are arranged in a staggered manner in this utility model;

[0023] Figure 8 This is an exploded view of the present invention. Figure 1 ;

[0024] Figure 9 This is an exploded view of the present invention. Figure 2 . Detailed Implementation

[0025] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0026] This utility model discloses a foldable stroller, including a frame body 1 and a seat assembly 2. The frame body 1 has a footrest assembly 11 and a handlebar assembly 12 that are capable of relative movement. A first locking device 3 is provided between the footrest assembly 11 and the handlebar assembly 12. The seat assembly 2 includes a seat 21 and a backrest 22 that are capable of relative rotation. A second locking device 4 and a limiting mechanism 5 for limiting the rotation angle of the seat 21 and the backrest 22 are provided between them. The seat assembly 2 is also rotatably connected to a rotating component 61, which is connected to a traction rope 62. A stop structure 9 is provided between the rotating component 61 and the seat assembly 2, which can limit the rotation angle of the seat assembly 2. The rotation range of the rotating component 61 is restricted so that the rotating component 61 can rotate in the first rotation stroke or the restriction on the rotation range of the rotating component 61 can be released so that the rotating component 61 can enter the second rotation stroke. When the rotating component 61 rotates in the first rotation stroke, the traction rope 62 unlocks the second locking device 4. When the rotating component 61 rotates in the second rotation stroke, the traction rope 62 unlocks the second locking device 4 and drives the limiting mechanism 5 to release the restriction on the rotation angle between the seat 21 and the backrest 22. The seat assembly 2 and the frame body 1 are also provided with a first linkage mechanism 7 that can drive the first locking device 3 to unlock when the backrest 22 rotates to a preset angle.

[0027] like Figures 1 to 9As shown in the embodiment, the foot assembly 11 is connected to the front and rear wheels, and the handle assembly 12 is connected to the armrest structure. The foot assembly 11 and the handle assembly 12 achieve relative folding movement through a hinge shaft, thereby realizing unfolding or folding. The first locking device 3 is used to lock the relative position of the two when the stroller is unfolded to ensure stable driving; when folded, the first locking device 3 needs to be unlocked to allow the frame to fold. The seat 21 and the backrest 22 are rotatably connected. The second locking device 4 can lock the backrest 22 at a certain angle position to prevent the backrest 22 and the seat 21 from rotating relative to each other during use. The limiting mechanism 5 can limit the maximum rotation angle of the backrest 22 within the normal use range. When the limiting mechanism 5 is activated, the backrest 22 cannot rotate to the predetermined angle to drive the first locking device 3 to unlock. In this embodiment, the rotating component 61 is a lever, which is mounted on the seat assembly 2 and can rotate relative to the seat assembly 2. One end of the traction rope 62 is connected to the rotating component 61, so that when the rotating component 61 rotates, it can pull the traction rope 62, thereby unlocking the second locking device 4 and the drive limiting mechanism 5 to release the rotation restriction on the backrest 22. The stop structure 9 is disposed between the rotating component 61 and the seat assembly 2. In the initial state, the stop structure 9 restricts the rotation angle of the rotating component 61, allowing it to rotate only within the first rotation stroke. The user can actively release this restriction, allowing the rotating component 61 to enter the second rotation stroke. The first linkage mechanism 7 can drive the first locking device 3 to unlock when the backrest 22 rotates to a predetermined angle close to lying flat or folded, improving the ease of unlocking.

[0028] One embodiment of this utility model is used as follows: When the user needs to adjust the angle of the backrest 22, the user operates the rotating component 61. At this time, the stop structure 9 is not released. The rotating component 61 rotates within the first rotation stroke and pulls the second locking device 4 to unlock it through the traction rope 62. The backrest 22 can rotate within a certain angle range under the constraint of the limiting mechanism 5, thereby realizing the angle adjustment of the backrest 22. When the user needs to fold up the whole vehicle, the user first releases the restriction of the stop structure 9, and then operates the rotating component 61 to enter the second rotation stroke. The traction rope 62 pulls further, keeping the second locking device 4 in the unlocked state while pulling the limiting mechanism 5 to release the rotation restriction on the backrest 22. The backrest 22 can continue to rotate until the preset folding angle is reached, and the first locking device 3 on the frame is unlocked through the first linkage mechanism 7, thereby making the footrest assembly 11 and the handlebar assembly 12 foldable and foldable.

[0029] By setting the stop structure 9, the rotating part 61 is placed in the first rotation stroke, realizing the angle adjustment of the backrest 22 under the constraint of the limiting mechanism 5. When the stroller needs to be folded, the user must release the restriction of the stop structure 9 on the rotating part 61, allowing the rotating part 61 to enter the second rotation stroke. At this time, the traction rope 62 further drives the limiting mechanism 5 to release the rotation constraint on the backrest 22, so that the backrest 22 can rotate to the preset folding angle. The first linkage mechanism 7 triggers the unlocking of the first locking device 3 of the frame, thereby completing the folding action of the entire stroller. The setting of the stop structure 9 effectively avoids the user accidentally activating the folding mechanism due to misoperation when adjusting the angle of the backrest 22, reducing the safety risk of pinching or tipping caused by the sudden folding of the stroller, and improving the safety and reliability of use.

[0030] The seat 21 is provided with a seat rotation seat 211. The second locking device 4 includes a first slot 41 provided on the seat rotation seat 211. The backrest 22 is provided with a first locking member 42. The first locking member 42 extends into the first slot 41 to restrict the relative rotation between the backrest 22 and the seat rotation seat 211. One end of the traction rope 62 is connected to the first locking member 42 and is used to pull the first locking member 42 out of the first slot 41.

[0031] The chair seat swivel base 211 serves as the swivel support base for the backrest 22, and is provided with a first slot 41. For example... Figure 4 , Figure 8 As shown in the embodiment, the first slot 41 has multiple slots arranged along the rotation trajectory of the backrest 22. The first slot 41 is used to cooperate with the first locking member 42 to lock the backrest 22 at different angular positions. The first locking member 42 is disposed on the backrest 22 or its connecting bracket and can move linearly relative to the backrest 22. One end of the locking member can extend into the first slot 41 under the action of an elastic element, thereby restricting the rotation of the backrest 22 relative to the seat swivel base 211 and achieving angle locking. One end of the traction rope 62 is connected to the first locking member 42, and the other end is connected to the rotating member 61. When the rotating member 61 rotates, external force acts on the first locking member 42 through the traction rope 62, causing it to disengage from the first slot 41, releasing the lock, and allowing the backrest 22 to rotate freely.

[0032] The limiting mechanism 5 includes a limiting groove 51 formed on the seat rotation seat 211, and the backrest 22 is provided with a second locking member 52. The second locking member 52 extends into the limiting groove 51 in the limiting state and can slide along the length direction of the limiting groove 51.

[0033] like Figure 8As shown in the embodiment, the limiting groove 51 is an elongated groove extending along an arc trajectory, the center of which coincides with or is concentrically arranged with the relative rotation axis between the backrest 22 and the seat 21. The length direction of the limiting groove 51 corresponds to the allowable normal adjustment angle range of the backrest 22, and the two ends of the limiting groove 51 respectively define the minimum and maximum use angles. The second locking member 52 is disposed on the backrest 22 or its connecting bracket and rotates synchronously with the backrest 22. One end of the second locking member 52 extends into the limiting groove 51 and forms a motion constraint with the side wall of the limiting groove 51. In the limited state, the second locking member 52 can slide within the length direction of the limiting groove 51. When the backrest 22 rotates to either end of the limiting groove 51, the second locking member 52 abuts against the groove end, preventing further rotation and achieving mechanical limiting.

[0034] A second linkage mechanism 8 is provided between the first locking member 42 and the second locking member 52, which enables the first locking member 42 to drive the second locking member 52 to disengage from the limiting groove 51 when the rotating member 61 rotates to the second rotation stroke.

[0035] When the rotating member 61 enters the second rotation stroke, the second linkage mechanism 8 can drive the second locking member 52 to disengage from the limiting groove 51 through the further movement of the first locking member 42, thereby releasing the restriction on the rotation angle of the backrest 22, so that the backrest 33 continues to rotate and triggers the folding of the whole vehicle.

[0036] The second linkage mechanism 8 includes a linkage groove 81 formed on one of the first locking member 42 and the second locking member 52, and an extension part 82 extending into the linkage groove 81 on the other of the two. When the rotating member 61 rotates during the first rotation stroke, the extension part 82 slides within the linkage groove 81; when the rotating member 61 rotates during the second rotation stroke, the extension part 82 slides to the end of the linkage groove 81 and presses against the groove wall of the linkage groove 81 to push the second locking member 52 to move.

[0037] As shown in Figure 4, Figure 5 , Figure 8 , Figure 9 As shown in the embodiment, the linkage groove 81 is a long strip-shaped through groove or recess, and has a clear starting end and ending end. The extension part 82 is a protruding structure whose size is adapted to the width of the linkage groove 81, and can extend into and slide along the linkage groove 81.

[0038] In one embodiment, when the user operates the rotating member 61 and the rotating member 61 is in the first rotation stroke, the traction rope 62 pulls the first locking member 42 to move, causing it to disengage from the first slot 41, thereby unlocking the backrest angle adjustment. At this time, the extension part 82 slides in the linkage groove 81, but since the linkage groove 81 has sufficient length, the extension part 82 has not yet reached the end of the groove, the second locking member 52 is not pushed and remains in the limiting groove 51, and the rotation angle of the backrest 22 is still restricted. After the user releases the restriction of the stop structure 9, they continue to operate the rotating part 61, so that the rotating part 61 is in the second rotation stroke. At this time, the traction rope 62 further pulls the first locking part 42 to generate additional displacement. The extension part 82 continues to slide in the linkage groove 81 until it contacts the end wall of the linkage groove 81, generating top pressure and transmitting it to the second locking part 52, pushing it to move out of the limit groove 51. The rotation restriction of the backrest 22 is released, and it can continue to rotate to the preset closing angle, thereby triggering the first linkage mechanism 7 to unlock the frame.

[0039] As shown in Figure 4, Figure 5 , Figure 8 , Figure 9 As shown, in this embodiment, the linkage groove 81 is provided on the second locking member 52, and the extension part 82 is provided on the first locking member 42. The same function can also be achieved by providing the linkage groove 81 on the first locking member 42 and the extension part 82 on the second locking member 52.

[0040] The second linkage mechanism 8 can also be implemented in other ways, such as by hinged one or more connecting rods to the first locking member 42 and the second locking member 52 respectively. When the rotating member 61 enters the second rotation stroke, the first locking member 42 continues to move and pushes or pulls the second locking member 52 through the connecting rod to disengage it from the limiting groove 51.

[0041] Alternatively, the first locking member 42 and the second locking member 52 can be unlocked in different rotational strokes using other methods. For example, the traction rope can be divided into two traction ends of different lengths near the first locking member 42, with one traction end connected to the first locking member 42 and the other traction end connected to the second locking member 52. During the first rotational stroke, only one traction end of the rotating member 61 is subjected to force, causing the first locking member 42 to disengage from the first slot 41. After entering the second rotational stroke, the traction rope continues to pull, and the other traction end begins to be subjected to force, causing the second locking member 52 to disengage from the limiting slot 51.

[0042] The stop structure 9 includes a first stop block 91 disposed on the rotating member 61 and capable of rotating with the rotating member 61, and a second stop block 92 disposed on the seat assembly 2. The first stop block 91 and the second stop block 92 can move relative to each other so that they are aligned or staggered. When they are aligned, the second stop block 92 is located on the rotation path of the first stop block 91 and abuts against the first stop block 91 when the rotating member 61 rotates to a preset angle.

[0043] like Figure 6 , Figure 7 As shown, in this embodiment, a stop structure 9 is formed by providing a first stop block 91 on the rotating member 61 and a second stop block 92 on the seat assembly 2. The user can limit the rotation range of the rotating member 61 by controlling whether the two are aligned. When aligned, the second stop block 92 abuts against the first stop block 91 at a preset angle, preventing the rotating member 61 from entering the second rotation stroke; when misaligned, the rotating member 61 can continue to rotate to the second rotation stroke, thus entering the folded state.

[0044] The rotating member 61 has a guide groove 93 in the left-right direction. The first stop block 91 has a guide portion 94 that extends into the guide groove 93. The guide portion 94 is connected to an elastic member 95. The elastic member 95 pushes the first stop block 91 so that the first stop block 91 is aligned with the second stop block 92.

[0045] like Figure 3 As shown in the embodiment, the guide groove 93 is formed on the rotating member 61 in the left-right direction. The guide part 94 extends into the guide groove 93 and slides with the groove wall, so that the first stop block 91 can only slide along the length direction of the guide groove 93. The elastic member 95 is connected between the first stop block 91 and the rotating member 61. When no external force is applied, the elastic member 95 continuously pushes the first stop block 91 to slide along the guide groove 93 to a preset alignment position, thereby limiting the stroke of the rotating member 61. The user needs to actively slide the first stop block 91 to offset it before entering the second rotation stroke, thus ensuring the safety and reliability of use.

[0046] The seat assembly 2 includes a mounting base 63 detachably connected to the backrest 22. The mounting base 63 has a mounting groove 631, and the rotating component 61 is rotatably connected within the mounting groove 631. The second stop block 92 is disposed on the mounting base 63. By providing a detachable mounting base 63 on the backrest 22, rotatably connecting the rotating component 61 to its mounting groove 631, and disposing of the second stop block 92 on the mounting base 63, an integrated operation control unit is formed. This achieves stable installation of the rotating component 61 and reliable execution of the stop function, improving product maintainability and production assembly efficiency.

[0047] The first locking device 3 includes a handlebar rotating seat 31 mounted on the handlebar assembly 12 and a tripod rotating seat 32 mounted on the tripod assembly 11 and rotatably connected to the handlebar rotating seat 31. The handlebar rotating seat 31 has a second slot 33, and the tripod rotating seat 32 has a third slot 34. Both the handlebar rotating seat 31 and the tripod rotating seat 32 are equipped with a third locking member 35, which can be inserted into the second slot 33 and the third slot 34 to restrict the relative rotation of the handlebar rotating seat 31 and the tripod rotating seat 32. By providing a second slot 33 on the handlebar rotating seat 31, a third slot 34 on the tripod rotating seat 32, and a third locking member 35 that can be inserted into both slots, a reliable mechanical locking device is formed. When the frame is unfolded, the two slots align, and the third locking member 35 is simultaneously inserted to achieve locking; when folded, the third locking member 35 disengages from at least one slot to release the lock. The structure is simple and stable.

[0048] The seat 21 is provided with a seat rotating seat 211, and the backrest 22 is provided with a backrest rotating seat 221 rotatably connected to the seat rotating seat 211. The first linkage mechanism 7 includes an unlocking member 71 movably connected to the seat rotating seat 211. One end of the unlocking member 71 abuts against the third locking member 35. The unlocking member 71 is provided with a first inclined surface 711, and the backrest rotating seat 221 is provided with a second inclined surface 2211 that cooperates with the first inclined surface 711. When the backrest 22 rotates to a preset angle, the second inclined surface 2211 rotates with the backrest rotating seat 221 and pushes the first inclined surface 711, causing the unlocking member 71 to move outward and push the third locking member 35 out of the second slot 33 or the third slot 34.

[0049] like Figure 8 , Figure 9 As shown in the embodiment, an unlocking member 71 is movably connected to the seat rotating base 211, and a first inclined surface 711 is provided on it, which cooperates with a second inclined surface 2211 provided on the backrest rotating base 221. When the backrest 22 rotates to a preset closing angle, the second inclined surface 2211 pushes the first inclined surface 711, causing the unlocking member 71 to move outward and push the third locking member 35 out of the slot, thereby automatically unlocking the frame.

[0050] like Figure 8 , Figure 9 As shown in the embodiment, the frame is also equipped with an unlocking button 10 that can unlock the first locking device 3. The unlocking button 10 is directly or indirectly connected to the third locking member 35 in the first locking device 3, and drives the third locking member 35 to disengage from the slot. When the seat assembly 2 is not installed on the frame, the unlocking button 10 allows the user to unlock the frame to fold it up, enhancing the practicality and flexibility of the product.

[0051] The above description only discloses preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent changes made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A foldable stroller, characterized in that, The vehicle includes a frame body (1) and a seat assembly (2). The frame body (1) has a footrest assembly (11) and a handlebar assembly (12) that are capable of relative movement. A first locking device (3) is provided between the footrest assembly (11) and the handlebar assembly (12). The seat assembly (2) includes a seat (21) and a backrest (22) that are capable of relative rotation. A second locking device (4) and a limiting mechanism (5) for limiting the rotation angle between the seat (21) and the backrest (22) are provided. The seat assembly (2) is also rotatably connected to a rotating component (61). The rotating component (61) is connected to a traction rope (62). A stop structure (9) is provided between the rotating component (61) and the seat assembly (2). The stop structure (9) can limit rotation. The rotation range of component (61) is such that component (61) rotates in the first rotation stroke or the rotation range restriction of component (61) is released so that component (61) can enter the second rotation stroke. When component (61) rotates in the first rotation stroke, the traction rope (62) unlocks the second locking device (4). When component (61) rotates in the second rotation stroke, the traction rope (62) unlocks the second locking device (4) and the drive limiting mechanism (5) releases the restriction on the rotation angle between the seat (21) and the backrest (22). A first linkage mechanism (7) is also provided between the seat assembly (2) and the frame body (1) so that the first locking device (3) can be unlocked when the backrest (22) rotates to a preset angle.

2. The foldable stroller according to claim 1, characterized in that, The seat (21) is provided with a seat rotation seat (211), and the second locking device (4) includes a first slot (41) provided on the seat rotation seat (211). The backrest (22) is provided with a first locking member (42). The first locking member (42) extends into the first slot (41) to restrict the relative rotation between the backrest (22) and the seat rotation seat (211). One end of the traction rope (62) is connected to the first locking member (42) and is used to pull the first locking member (42) away from the first slot (41).

3. A foldable stroller according to claim 2, characterized in that, The limiting mechanism (5) includes a limiting groove (51) opened on the seat rotation seat (211), and the backrest (22) is provided with a second locking member (52). The second locking member (52) extends into the limiting groove (51) in the limiting state and can slide along the length direction of the limiting groove (51).

4. A foldable stroller according to claim 3, characterized in that, A second linkage mechanism (8) is provided between the first locking member (42) and the second locking member (52) so that the first locking member (42) can drive the second locking member (52) to disengage from the limiting groove (51) when the rotating member (61) rotates to the second rotation stroke.

5. A foldable stroller according to claim 4, characterized in that, The second linkage mechanism (8) includes a linkage groove (81) formed on one of the first locking member (42) and the second locking member (52), and an extension part (82) extending into the linkage groove (81) on the other of the two. When the rotating member (61) rotates during the first rotation stroke, the extension part (82) slides in the linkage groove (81); when the rotating member (61) rotates during the second rotation stroke, the extension part (82) slides to the end of the linkage groove (81) and presses against the groove wall of the linkage groove (81) to push the second locking member (52) to move.

6. A foldable stroller according to claim 1, characterized in that, The stop structure (9) includes a first stop block (91) disposed on the rotating member (61) and capable of rotating with the rotating member (61). The seat assembly (2) is provided with a second stop block (92). The first stop block (91) and the second stop block (92) can move relative to each other so that they are aligned or staggered. When they are aligned, the second stop block (92) is located on the rotation path of the first stop block (91) and abuts against the first stop block (91) when the rotating member (61) rotates to a preset angle.

7. A foldable stroller according to claim 6, characterized in that, The rotating member (61) has a guide groove (93) in the left-right direction. The first stop block (91) has a guide part (94) that extends into the guide groove (93). The guide part (94) is connected to an elastic member (95). The elastic member (95) pushes the first stop block (91) so that the first stop block (91) is aligned with the second stop block (92).

8. A foldable stroller according to claim 7, characterized in that, The seat assembly (2) includes a mounting base (63) detachably connected to the backrest (22), the mounting base (63) having a mounting groove (631), the rotating member (61) being rotatably connected in the mounting groove (631), and the second stop block (92) being provided on the mounting base (63).

9. A foldable stroller according to claim 1, characterized in that, The first locking device (3) includes a handle rotating seat (31) provided on the handle assembly (12) and a tripod rotating seat (32) provided on the tripod assembly (11) and rotatably connected to the handle rotating seat (31). The handle rotating seat (31) is provided with a second slot (33), and the tripod rotating seat (32) is provided with a third slot (34). The handle rotating seat (31) and the tripod rotating seat (32) are provided with a third locking member (35). The third locking member (35) can be inserted into the second slot (33) and the third slot (34) to restrict the relative rotation of the handle rotating seat (31) and the tripod rotating seat (32).

10. A foldable stroller according to claim 9, characterized in that, The seat (21) is provided with a seat rotating seat (211), and the backrest (22) is provided with a backrest rotating seat (221) rotatably connected to the seat rotating seat (211). The first linkage mechanism (7) includes an unlocking member (71) movably connected to the seat rotating seat (211). One end of the unlocking member (71) abuts against the third locking member (35). The unlocking member (71) is provided with a first inclined surface (711), and the backrest rotating seat (221) is provided with a second inclined surface (2211) that cooperates with the first inclined surface (711). When the backrest (22) rotates to a preset angle, the second inclined surface (2211) rotates with the backrest rotating seat (221) and pushes the first inclined surface (711), so that the unlocking member (71) moves outward and pushes the third locking member (35) out of the second slot (33) or the third slot (34).

Images