Baby carriage

Abstract

The utility model discloses a baby carriage, which has an unfolded state and a folded state and comprises a frame component, a handrail component, a first locking component and a backrest component. The handrail assembly is rotationally connected with the frame assembly; the first locking assembly has a locking state for locking the armrest assembly and the frame assembly and an unlocking state for unlocking the armrest assembly and the frame assembly; the backrest assembly is rotationally connected with the frame assembly, the backrest assembly gets close to the frame assembly when moving in the folding direction, and the backrest assembly is configured to be capable of driving the first locking assembly to unlock the armrest assembly and the frame assembly when moving in the folding direction and is in transmission connection with the armrest assembly after the armrest assembly and the frame assembly are unlocked. According to the baby carriage provided by the embodiment of the utility model, when the baby carriage is folded, the backrest assembly drives the armrest assembly to be folded together, so that the folding steps of the baby carriage are reduced, and the use experience of a user is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of children's products, especially a baby carriage. BACKGROUND

[0002] The baby carriage is a kind of transportation tool designed for children, and it is convenient for children to go out and play.The existing baby carriage mainly includes front frame, front wheel, main frame, rear frame and rear wheel, in order to improve the comfort of riding, the main frame is provided with seat with backrest and handrail.In order to make the baby carriage convenient to carry and store, some baby carriages with folding structure appear in the related technology.However, the existing baby carriage folding structure is complex, and the steps of folding baby carriage are complicated, which reduces the user's experience. SUMMARY

[0003] The utility model aims at at least one of the technical problems in the related art is solved.To this end, one purpose of the utility model is to provide a baby carriage, when folding, the backrest assembly drives the handrail assembly to fold together, reducing the steps of folding baby carriage, improving the user's experience.

[0004] According to the baby carriage of the utility model embodiment, the baby carriage has unfolded state and folded state, and the baby carriage comprises:

[0005] Frame assembly;

[0006] Handrail assembly, the handrail assembly is rotatably connected with the frame assembly;

[0007] First locking assembly, the first locking assembly has the locking state of locking the handrail assembly and the frame assembly and the unlocking state of unlocking the handrail assembly and the frame assembly;

[0008] Backrest assembly, the backrest assembly is rotatably connected with the frame assembly, and the backrest assembly is close to the frame assembly when moving along folding direction, and the backrest assembly is configured to drive the first locking assembly to unlock the handrail assembly and the frame assembly when moving along the folding direction, and the backrest assembly is in transmission connection with the handrail assembly after the handrail assembly and the frame assembly are unlocked.

[0009] According to the baby carriage of the utility model embodiment, when folding, the backrest drives the handrail to fold together, reduces the steps of folding baby carriage, reduces the operation difficulty of folding baby carriage, and improves the user's experience.

[0010] In addition, the baby carriage according to the above embodiment of the utility model can also have the following additional technical features:

[0011] In some embodiments, the stroller comprises a first pivot axis, the armrest assembly is rotatably connected to the frame assembly about the first pivot axis, the first locking assembly comprises a locking block, the locking block is movably connected to the armrest assembly along a direction parallel to the first pivot axis, the frame assembly is provided with a first locking groove, the locking block is arranged in the first locking groove in the locked state, and the locking block is arranged out of the first locking groove in the unlocked state.

[0012] In some embodiments, the backrest assembly is rotatably connected to the frame assembly about the first pivot axis, an end of the locking block is provided with a wedge surface, the backrest assembly is opposite to the wedge surface in the folding direction, and the backrest assembly can abut against the wedge surface and drive the locking block to be arranged out of the first locking groove when the backrest assembly moves in the folding direction.

[0013] In some embodiments, the backrest assembly is provided with a clearance groove, and the locking block is arranged in the clearance groove.

[0014] In some embodiments, the clearance groove is an arc-shaped groove extending along a direction around the first pivot axis, a length of the clearance groove along the direction around the first pivot axis is greater than a length of the locking block, and the locking block is slidable along the clearance groove in the unfolded state.

[0015] In some embodiments, the first locking assembly further comprises a transmission member, the transmission member is connected to the armrest assembly, the transmission member is rotatably connected to the frame assembly about the first pivot axis, the backrest assembly is rotatably connected to the frame assembly about the first pivot axis, and the transmission member is opposite to the backrest assembly along a direction parallel to the first pivot axis; one of the backrest assembly and the transmission member is provided with a positioning protrusion, and the other is provided with a positioning groove, and the positioning protrusion is detachably embedded in the positioning groove along a direction around the first pivot axis.

[0016] In some embodiments, the transmission member comprises a main body and an elastic portion, the elastic portion and the main body are distributed along a direction parallel to the first pivot axis, and the elastic portion and the main body are spaced apart along the direction parallel to the first pivot axis to form an elastic groove, and the positioning groove is arranged on a side of the elastic portion away from the main body.

[0017] In some embodiments, the positioning groove comprises a plurality of first grooves, the plurality of first grooves are distributed along a direction around the first pivot axis, and the positioning protrusion is selectively embedded in the first grooves in the unfolded state.

[0018] In some embodiments, the positioning groove comprises a second groove, the second groove is arranged at an end of the elastic portion in the folding direction, and the positioning protrusion is embedded in the second groove after the armrest assembly and the frame assembly are unlocked.

[0019] In some embodiments, the first rotating shaft is connected with the transmission member, an outer circumferential surface of the first rotating shaft is provided with a sliding portion, the frame assembly is provided with a mounting hole, the first rotating shaft is rotationally fitted in the mounting hole, and a circumferential surface of the mounting hole is provided with a sliding groove, and the sliding portion is slidable along the sliding groove.

[0020] In some embodiments, the armrest assembly comprises a first cylinder portion, the transmission member comprises a second cylinder portion, and the first cylinder portion is arranged in the second cylinder portion; and the first cylinder portion and the second cylinder portion are connected by a key.

[0021] In some embodiments, the first cylinder portion is provided with an elastic protrusion, and the second cylinder portion is provided with a positioning hole, and the elastic protrusion is detachably inserted into the positioning hole.

[0022] In some embodiments, in the unfolded state, the first locking assembly is in the locked state, the backrest assembly is separated from the armrest assembly, and the backrest assembly is rotatable within a predetermined angle range.

[0023] In some embodiments, the stroller further comprises a second locking assembly, the second locking assembly is arranged on the backrest assembly and switches between locking and unlocking the backrest assembly and the frame assembly.

[0024] In some embodiments, the frame assembly is provided with a plurality of second locking grooves in the rotating direction of the backrest assembly, the second locking assembly comprises a bolt, the bolt is movable in a direction parallel to the rotating axis of the backrest assembly, and the bolt is selectively arranged in the second locking grooves in the unfolded state.

[0025] In some embodiments, the frame assembly comprises a seat cushion and a fixed seat, the fixed seat is connected to the rear end of the seat cushion, and the armrest assembly and the backrest assembly are rotationally connected to the fixed seat. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a perspective view of a stroller in some embodiments of the utility model, and the stroller is in an unfolded state.

[0027] Figure 2 is Figure 1 is a partial enlarged view of the A area of the ring.

[0028] Figure 3 is a perspective view of a stroller in some embodiments of the utility model, and the stroller is in a folded state.

[0029] Figure 4 is an exploded view of a stroller in some embodiments of the utility model, and the stroller is in a folded state.

[0030] Figure 5is another explosion map of the child bicycle in some embodiments of the utility model, and the child bicycle is in the folding state.

[0031] Figure 6 is a schematic view of the handrail assembly of the child bicycle in some embodiments of the utility model.

[0032] Figure 7 is Figure 6 is a partial enlarged schematic view of the circle B area.

[0033] Figure 8 is another schematic view of the handrail assembly of the child bicycle in some embodiments of the utility model.

[0034] Figure 9 is Figure 8 is a partial enlarged schematic view of the circle C area.

[0035] Figure 10 is a schematic view of the locking block of the child bicycle in some embodiments of the utility model.

[0036] Figure 11 is another schematic view of the locking block of the child bicycle in some embodiments of the utility model.

[0037] Figure 12 is a schematic view of the transmission part of the child bicycle in some embodiments of the utility model.

[0038] Figure 13 is another schematic view of the transmission part of the child bicycle in some embodiments of the utility model.

[0039] Figure 14 is a schematic view of the fixed seat of the child bicycle in some embodiments of the utility model.

[0040] Figure 15 is another schematic view of the fixed seat of the child bicycle in some embodiments of the utility model.

[0041] Figure 16 is a schematic view of the backrest assembly of the child bicycle in some embodiments of the utility model.

[0042] Figure 17 is Figure 16 is a partial enlarged schematic view of the circle D area.

[0043] Figure 18 is a schematic view of the backrest assembly of the child bicycle in some embodiments of the utility model.

[0044] Figure 19 is Figure 18 is a partial enlarged schematic view of the circle E area.

[0045] The drawings show: child's car 100, frame assembly 10, fixed seat 11, first locking groove 111, mounting hole 112, sliding groove 113, second locking groove 114, armrest assembly 20, swing arm 21, crossbeam 22, first cylinder part 23, elastic convex part 231, moving groove 201, first slot hole 202, second slot hole 203, first locking assembly 30, locking block 31, first positioning block 311, second positioning block 312, wedge surface 313, transmission member 32, main body part 321, elastic part 322, first groove part 3221, second groove part 3222, second cylinder part 323, positioning hole 3231, backrest assembly 40, give way groove 41, second locking assembly 42, bolt 421, first rotating shaft 50, sliding part 51. DETAILED DESCRIPTION

[0046] The embodiments of the present application are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0047] The child's car 100 according to the embodiments of the present application comprises: a frame assembly 10, an armrest assembly 20, a first locking assembly 30 and a backrest assembly 40.

[0048] In combination Figures 1 to 3 , specifically, the child's car 100 has an unfolded state and a folded state, as shown in Figure 1 , in the unfolded state, the armrest assembly 20 and the backrest assembly 40 surround a use space, and a user can sit in the use space; as shown in Figure 3 , in the folded state, the armrest assembly 20 and the backrest assembly 40 are folded and folded relative to the frame assembly 10. The armrest assembly 20 is rotationally connected to the frame assembly 10, and the first locking assembly 30 has a locked state and an unlocked state. In the locked state, the first locking assembly 30 locks the armrest assembly 20 and the frame assembly 10; in the unlocked state, the first locking assembly 30 unlocks the armrest assembly 20 and the frame assembly 10.

[0049] Among them, the first locking assembly 30 can be used to lock the armrest assembly at the armrest unfolded position, specifically, in the locked state, the position of the armrest assembly 20 relative to the frame assembly 10 is fixed, and the armrest assembly 20 is locked in the unfolded state; in the unlocked state, the armrest assembly 20 is unlocked, and the armrest assembly 20 can rotate between the armrest folded position and the armrest unfolded position.

[0050] In addition, the backrest assembly 40 is rotationally connected to the frame assembly 10, and the backrest assembly 40 is folded along the folding direction (refer to the drawing Figure 1When the child stroller 100 is folded, the backrest assembly 40 is first rotated towards the folding direction, and the backrest assembly 40 can drive the first locking assembly 30 to unlock the handle assembly 20 and the frame assembly 10 in the process of rotating the backrest assembly 40 towards the folding direction, so that the handle assembly 20 can be rotated towards the folding direction. Then, the backrest assembly 40 continues to rotate towards the folding direction and drives the handle assembly 20 to rotate towards the folding direction, and the backrest assembly 40 and the handle assembly 20 are folded and close to the frame assembly 10, thereby achieving the purpose of folding the handle assembly 20 by the backrest assembly 40.

[0051] According to the child stroller 100, the backrest assembly 40 drives the handle assembly 10 to fold together when the child stroller 100 is folded, the folding steps of the child stroller 100 are reduced, the operation difficulty of folding the child stroller 100 is reduced, and the use experience of the user is improved.

[0052] Optionally, a part of the first locking assembly 30 is arranged inside the handle assembly 20 and arranged in the frame assembly 10 in the locked state to limit the handle assembly 20 to be fixed on the frame assembly 10, and the first locking assembly 30 is withdrawn from the frame assembly 10 in the unlocked state, and the handle assembly 20 can be rotated relative to the frame assembly 10.

[0053] Optionally, the first locking assembly 30 is fixedly connected with the backrest assembly 40 after being unlocked, another part of the first locking assembly 30 is fixedly connected with the handle assembly 20, the backrest assembly 40 continues to rotate towards the folding direction to the folded state, the force of the backrest assembly 40 driving the first locking assembly 30 to rotate is converted into the force of the first locking assembly 30 driving the handle assembly 20 to rotate, the first locking assembly 30 drives the handle assembly 20 to rotate towards the folding direction to the folded state, and the folding of the handle assembly 20 by the backrest assembly 40 is achieved.

[0054] In combination with Figure 5 , Figure 7 , Figure 10 and Figure 15In some embodiments, the stroller 100 includes a first pivot 50, an armrest assembly 20 rotatably connected to the frame assembly 10 about the first pivot 50, and a first locking assembly 30 including a locking block 31 movably connected to the armrest assembly 20 in a direction parallel to the first pivot 50. The frame assembly 10 is provided with a first locking groove 111. In the locked state, the locking block 31 passes through the first locking groove 111, and in the unlocked state, it exits the first locking groove 111. In the locked state, the locking block 31 passes through the first locking groove 111, restricting the armrest assembly 20 from rotating about the first pivot 50, and the armrest assembly 20 is fixed in position relative to the frame assembly 10, located in the armrest extended position. When changing from the locked state to the unlocked state, the locking block 31 moves in a direction parallel to the first pivot 50 and exits the first locking groove 111, releasing the fixation of the armrest assembly 20 relative to the frame assembly 10, allowing the armrest assembly 20 to rotate relative to the frame assembly 10.

[0055] The first rotating shaft 50 can be set to be along the attached Figure 4 Extending horizontally in the middle, parallel to the first axis of rotation 50, can be referenced in the appendix. Figure 4 In the left-right direction. For example, the frame assembly 10 may include a fixed base 11, and the armrest assembly 20 may include a swing arm 21. One end of the swing arm 21 is rotatably connected to the fixed base 11 along an axis extending in the left-right direction. The swing arm 21 has a moving groove 201 extending in the left-right direction. A locking block 31 may be disposed in the moving groove 201 and is movable in the left-right direction. Alternatively, the frame assembly 10 may include two fixed bases 11 distributed in the left-right direction, and the armrest assembly 20 may include two swing arms 21 distributed in the left-right direction. The two swing arms 21 are rotatably connected to the two fixed bases 11 respectively, and at least one end of the swing arm 21 is provided with a locking block 31.

[0056] In addition, such as Figure 6 The handrail assembly 20 also includes a crossbeam 22, which extends in the left-right direction and connects to the other ends of the two swing arms 21 respectively.

[0057] Combination Figures 9 to 11Optionally, the locking block 31 can move along the left-right direction to switch between the locked state and the unlocked state. The locking block 31 can be provided with a first positioning block 311, the sidewall of the moving groove 201 can be provided with a first slot hole 202, the first slot hole 202 can be arranged to extend along a direction parallel to the rotation center axis of the armrest assembly 20, and the first positioning block 311 can be slidably positioned in the first slot hole 202 to limit the range of movement of the locking block 31. In addition, the locking block 31 can also be provided with a second positioning block 312, the second positioning block 312 and the first positioning block 311 can be respectively arranged on two opposite sides of the locking block 31, and the sidewall of the moving groove 201 can be provided with a second slot hole 203, the second slot hole 203 can be arranged to extend along a direction parallel to the rotation center axis of the armrest assembly 20, and the second positioning block 312 can be slidably positioned in the second slot hole 203.

[0058] Further, the first locking assembly 30 can further include a spring (not shown in the figure), the spring can be arranged in the sliding groove 201 and has an elastic force for driving the locking block 31 to extend out of the moving groove 201 and move to the locked state. When the stroller 100 is folded, the backrest assembly 40 rotates in the folding direction and unlocks the locking block 31, the backrest assembly 40 presses the locking block 31, and the locking block 31 presses the spring; when the backrest assembly 40 switches from the folded state to the unfolded state, the spring releases the elastic force to drive the locking block 31 to move and extend into the first locking slot 111, so that the locking block 31 restores to the locked state, ensuring that the armrest assembly 20 is fixed relative to the frame assembly 10 in the unfolded state.

[0059] In combination with Figure 4 , Figure 5 and Figure 10 and Figure 11 , in some embodiments, the backrest assembly 40 is rotationally connected to the frame assembly 10 about the first rotation shaft 50, the end of the locking block 31 is provided with a wedge surface 313, the backrest assembly 40 is opposite to the wedge surface 313 in the folding direction, and the backrest assembly 40 can abut against the wedge surface 313 and drive the locking block 31 to exit the first locking slot 111 when the backrest assembly 40 moves in the folding direction. In the locked state, the end of the locking block 31 is arranged in the first locking slot 111, and the wedge surface 313 at the end of the locking block 31 is arranged opposite to the backrest assembly 40; when the backrest assembly 40 moves in the folding direction, the backrest assembly 40 will abut against the wedge surface 313, and under the action of the wedge surface 313, a part of the force applied by the backrest assembly 40 to the locking block 31 in the folding direction will be converted into a force in the extension direction of the locking block 31, thereby driving the locking block 31 to move towards the unlocked state and driving the locking block 31 to exit the first locking slot 111, thereby achieving the unlocking of the armrest assembly 20.

[0060] In combination with the foregoing, the locking block 31 can include two.

[0061] In combination Figure 4 and Figure 17 In some embodiments, the backrest assembly 40 is provided with a clearance slot 41, and the locking block 31 is arranged in the clearance slot 41. Thus, when the backrest assembly 40 moves in the folding direction, one side edge of the clearance slot 41 can abut the wedge surface 313 of the locking block 31, and drive the locking block 31 to move to the unlocked state.

[0062] Further, the clearance slot 41 is arranged as an arc-shaped slot extending in the direction around the first rotation shaft 50, and the length of the clearance slot 41 in the direction around the first rotation shaft 50 is greater than the length of the locking block 31. In the unfolded state, the locking block 31 is slidable along the clearance slot 41. The backrest assembly 40 has at least two different unfolded states. When the backrest assembly 40 is adjusted to different unfolded positions or the backrest assembly 40 is folded, the locking block 31 slides in the clearance slot 41.

[0063] For example, the backrest assembly 40 is symmetrically provided with two clearance slots 41 in the left-right direction, and the locking block 31 is symmetrically provided with two in the left-right direction. The two locking blocks 31 are arc-shaped members, and the periphery of the left locking block 31 cooperates with the left clearance slot 41, and the periphery of the right locking block 31 cooperates with the right clearance slot 41. In the unfolded state, the locking block 31 extends into the first locking slot 111, and the position of the armrest assembly 20 relative to the frame assembly 10 is fixed. When the backrest assembly 40 is adjusted to different unfolded positions, the backrest assembly 40 rotates around the first rotation shaft 50 and drives the two clearance slots 41 to rotate, the left locking block 31 slides relative to the left clearance slot 41, and the right locking block 31 slides relative to the right clearance slot 41.

[0064] Optionally, in the limit unfolded state of the backrest assembly 40, one end of the locking block 31 can abut one end of the clearance slot 41; in the intermediate unfolded state of the backrest assembly 40, the locking block 31 can be located in the clearance slot 41; and in the folded state of the backrest assembly 40, the other end of the locking block 31 can abut the other end of the clearance slot 41.

[0065] In combination Figure 4 and Figure 12In some embodiments, the first locking assembly 30 further comprises a transmission member 32 connected to the armrest assembly 20, the transmission member 32 is rotatably connected to the frame assembly 10 around the first rotation shaft 50, the backrest assembly 40 is rotatably connected to the frame assembly 10 around the first rotation shaft 50, and the transmission member 32 is opposite to the backrest assembly 40 along a direction parallel to the first rotation shaft 50; one of the backrest assembly 40 and the transmission member 32 is provided with a positioning protrusion (not shown in the figure), and the other is provided with a positioning groove, the positioning protrusion is detachably embedded in the positioning groove along a direction around the first rotation shaft 50, and the backrest assembly 40 can be fixed or rotated relative to the transmission member 32. In the unfolded state, the backrest assembly 40 is rotated relative to the transmission member 32; when switching from the unfolded state to the folded state, the backrest assembly 40 is fixed relative to the transmission member 32.

[0066] In addition, the first rotation shaft 50 can be arranged on the transmission member 32, or the first rotation shaft 50 and the transmission member 32 can be integrally formed.

[0067] For example, the transmission member 32 is symmetrically arranged in the left-right direction, the backrest assembly 40 is coaxially rotatable relative to the two transmission members 32 on both sides, the backrest assembly 40 is provided with a positioning protrusion on the side surface close to the transmission member 32, the transmission member 32 is provided with a positioning groove on the periphery, and the positioning protrusion and the positioning groove are opposite along the extension direction parallel to the first rotation shaft 50. The backrest assembly 40 has at least two unfolded states, the periphery of the transmission member 32 is provided with at least two positioning grooves, and the at least two unfolded states include a first unfolded state and a second unfolded state, and the two positioning grooves include a first positioning groove and a second positioning groove. When the backrest assembly 40 is in the first unfolded state, the positioning protrusion is embedded in the first positioning groove; when the backrest assembly 40 is switched from the first unfolded state to the second unfolded state, the positioning protrusion is separated from the first positioning groove and enters the second positioning groove with the rotation of the backrest assembly 40.

[0068] Alternatively, the first rotation shaft 50 can be arranged in the left-right direction, the extension direction of the first rotation shaft 50 can be the left-right direction, the backrest assembly 40 and the transmission member 32 can be opposite in the left-right direction, and the positioning groove and the positioning protrusion can be opposite in the left-right direction. The backrest assembly 40 can be provided with a positioning groove, the transmission member 32 can be provided with a positioning protrusion, the positioning protrusion can also be detachably embedded in the positioning groove, and the backrest assembly 40 can be rotated or fixed relative to the transmission member 32.

[0069] In some embodiments, the transmission member 32 comprises a main body portion 321 and an elastic portion 322, the elastic portion 322 and the main body portion 321 are distributed along a direction parallel to the first rotation axis 50, and the elastic portion 322 and the main body portion 321 are spaced apart along the direction parallel to the first rotation axis 50 to form an elastic groove, and the positioning groove portion is arranged on the side of the elastic portion 322 away from the main body portion 321. When the backrest assembly 40 rotates, the positioning convex portion extrudes the positioning groove portion to deform the elastic portion 322, and the backrest assembly 40 continues to rotate to enable the positioning convex portion to be separated from the positioning groove portion.

[0070] Specifically, the positioning convex portion is arranged on the side of the backrest assembly 40 close to the transmission member 32, the side of the transmission member 32 close to the backrest assembly 40 is provided with the elastic portion 322, the stroller 100 is in the unfolded state, and the positioning convex portion is embedded in the positioning groove portion; when the backrest assembly 40 rotates, the positioning convex portion extrudes the positioning groove portion along the direction of rotation, and after the positioning groove portion is extruded, the elastic portion 322 deforms in the elastic groove in the direction of the main body portion 321, the positioning groove portion moves in the direction of the main body portion 321 along with the elastic portion 322, and when the backrest assembly 40 continues to rotate, the positioning convex portion is separated from the current positioning groove portion and enters the next positioning groove portion.

[0071] In some embodiments, the positioning groove portion comprises a plurality of first groove portions 3221, the plurality of first groove portions 3221 are distributed along the direction around the first rotation axis 50, and the positioning convex portion is selectively embedded in the first groove portion 3221 in the unfolded state, and the positioning convex portion is respectively located in a plurality of different first groove portions 3221 corresponding to a plurality of unfolded states of the backrest assembly 40.

[0072] For example, the side of the elastic portion 322 close to the backrest assembly 40 is provided with at least two first groove portions 3221, the at least two first groove portions 3221 comprise three first groove portions 3221, and the three first groove portions 3221 are distributed in a circumferential direction around the first rotation axis 50. In the projection in the front-rear direction, when the positioning convex portion of the backrest assembly 40 is located in the front first groove portion 3221, the backrest assembly 40 is in the minimum unfolded state; when the positioning convex portion is located in the middle first groove portion 3221, the backrest is in the intermediate unfolded state; and when the positioning convex portion is located in the rear first groove portion 3221, the backrest assembly 40 is in the maximum unfolded state.

[0073] Alternatively, the plurality of first groove portions 3221 can be two, three or even more first groove portions 3221, which can enable the backrest assembly 40 to be in different unfolded states, thereby meeting the use habits of different users and improving the user experience of using the stroller 100.

[0074] In some embodiments, the positioning groove includes a second groove 3222 at the end of the elastic part 322 along the folding direction, and the positioning protrusion is embedded in the second groove 3222 after the armrest assembly 20 and the frame assembly 10 are unlocked, so that the backrest assembly 40 is relatively fixed with the transmission member 32, and the backrest assembly 40 rotates along the folding direction to drive the armrest assembly 20 to rotate.

[0075] Specifically, the first locking assembly 30 further includes a locking block 31, and the transmission member 32 is fixedly connected with the armrest assembly 20. When the stroller 100 is folded, the backrest assembly 40 is rotated along the folding direction, the locking block 31 is removed from the locking of the armrest assembly 20 and the frame assembly 10, the armrest assembly 20 is rotatable relative to the frame assembly 10, and the positioning protrusion on the backrest assembly 40 is embedded in the second groove 3222 of the elastic part 322. When the backrest assembly 40 continues to rotate along the folding direction, the positioning protrusion presses the second groove 3222 along the folding direction, the second groove 3222 is located at the end of the elastic part 322 and cannot be pressed to deform the elastic part 322, the positioning protrusion cannot be separated from the positioning groove, the backrest assembly 40 is relatively fixed with the transmission member 32, the backrest assembly 40 drives the transmission member 32 to rotate along the folding direction, the force of the backrest assembly 40 driving the transmission member 32 to rotate is converted into the force of the transmission member 32 driving the armrest assembly 20 to rotate, the armrest assembly 20 is rotated along the folding direction under the traction of the transmission member 32, and the backrest assembly 40 drives the armrest assembly 20 to fold.

[0076] In combination with Figure 4 , Figure 12 and Figure 15 , in some embodiments, the first rotating shaft 50 is connected with the transmission member 32, the outer circumferential surface of the first rotating shaft 50 is provided with a sliding part 51, the frame assembly 10 is provided with a mounting hole 112, the first rotating shaft 50 is rotationally fitted in the mounting hole 112, the circumferential surface of the mounting hole 112 is provided with a sliding groove 113, the sliding part 51 is slidable along the sliding groove 113, and when the backrest assembly 40 is relatively fixed with the transmission member 32 and drives the transmission member 32 to rotate, the sliding part 51 slides from one end of the sliding groove 113 to the other end of the sliding groove 113.

[0077] For example, the first locking assembly 30 further comprises a locking block 31, the backrest assembly 40 is provided with a positioning protrusion, the transmission member 32 is provided with a first slot portion 3221, and the end of the elastic slot is provided with a second slot portion 3222. In the unfolded state of the stroller 100, the sliding part 51 is located at one end of the sliding groove 113, the locking block 31 passes through the transmission member 32 and the frame assembly 10, the first rotating shaft 50 is fixed relative to the position of the frame assembly 10, and the positioning protrusion can be disengaged or embedded in the first slot portion 3221. When the stroller 100 is folded, the backrest assembly 40 is rotated in the folding direction, the backrest assembly 40 drives the locking block 31 to release the locking of the armrest assembly 20 and the frame assembly 10, and at the same time, the positioning protrusion is embedded in the second slot portion 3222. The backrest assembly 40 continues to rotate in the folding direction, the positioning protrusion extrudes the second slot portion 3222 in the folding direction, the second slot portion 3222 is located at the end of the elastic portion 322, and the elastic portion 322 cannot be extruded to deform, the positioning protrusion cannot be disengaged from the positioning slot portion, and the backrest assembly 40 is relatively fixed with the transmission member 32. Continue to rotate the backrest assembly 40 to the folded state, the backrest assembly 40 drives the transmission member 32 to rotate in the folding direction, the first rotating shaft 50 rotates in the mounting hole 112, and the sliding part 51 slides with the first rotating shaft 50 from one end of the sliding groove 113 to the other end of the sliding groove 113.

[0078] Alternatively, one end of the sliding part 51 can abut against one end of the sliding groove 113 in the unfolded state of the stroller 100, so as to limit the armrest assembly 20 from rotating in the direction opposite to the folding direction; and the other end of the sliding part 51 can abut against the other end of the sliding groove 113 in the folded state, so as to limit the armrest assembly 20 and the backrest assembly 40 to be in the folded state and cannot rotate in the folding direction again.

[0079] In combination Figure 7 and Figure 13 In some embodiments, the armrest assembly 20 comprises a first cylinder portion 23, the transmission member 32 comprises a second cylinder portion 323, and the first cylinder portion 23 passes through the second cylinder portion 323, wherein the first cylinder portion 23 and the second cylinder portion 323 are key-connected, the first cylinder portion 23 and the second cylinder portion 323 are fixedly connected in the folding direction, and the first cylinder portion 23 and the second cylinder portion 323 are detachable in the direction parallel to the first rotating shaft 50.

[0080] In combination with the foregoing, the one end of the swing arm 21 is provided with a first cylinder portion 23, which can be provided with a key groove. The transmission member 32 is symmetrically provided with two in the left-right direction, the right transmission member 32 is connected with the right swing arm 21, and the left transmission member 32 is connected with the left swing arm 21. The second cylinder portion 323 can be provided with a connecting key, and the key groove and the connecting key extend in the extension direction parallel to the first rotating shaft 50. The connecting key moves in the extension direction parallel to the first rotating shaft 50 and can be installed in the key groove. When the backrest assembly 40 drives the two transmission members 32 to rotate in the folding direction, the left connecting key rotates with the left transmission member 32 to drive the left key groove to rotate, and the left key groove drives the left swing arm 21 to rotate; the right connecting key rotates with the right transmission member 32 to drive the right key groove to rotate, and the right key groove drives the right swing arm 21 to rotate, and the two transmission members 32 drive the armrest assembly 20 to rotate to the folding state. The connecting key moves in the extension direction parallel to the first rotating shaft 50, which can also disassemble the key groove, and the armrest assembly 20 can disconnect the connection with the transmission key and be disassembled.

[0081] Optionally, the first rotating shaft 50 can be provided in the left-right direction, and the extension direction of the first rotating shaft 50 can be the left-right direction. The first cylinder portion 23 can be provided with a connecting key, and the second cylinder portion 323 can be provided with a key groove. The swing arm 21 can move left or right to realize the fixing and disassembly of the transmission member 32, and realize the fixing or disassembly of the armrest assembly 20 and the transmission member 32.

[0082] In combination with Figure 7 and Figure 12 In some embodiments, the first cylinder portion 23 is provided with an elastic protrusion 231, and the second cylinder portion 323 is provided with a positioning hole 3231. The elastic protrusion 231 can be inserted into the positioning hole 3231, and the first cylinder portion 23 and the second cylinder portion 323 can be fixed or disassembled.

[0083] Specifically, the elastic protrusion 231 is arranged on the peripheral surface of the first cylinder portion 23, the positioning hole 3231 is arranged on the peripheral surface of the second cylinder portion 323, and the elastic protrusion 231 is opposite to the positioning hole 3231. The elastic protrusion 231 is inserted into the positioning hole 3231, and the first cylinder portion 23 is fixed relative to the second cylinder portion 323. When the elastic protrusion 231 is pressed, the elastic protrusion 231 is out of the positioning hole 3231, and the first cylinder portion 23 moves away from the second cylinder portion 323, and the first cylinder portion 23 can be disassembled.

[0084] Optionally, the elastic protrusion 231 can be provided as a button, which increases the portability of disassembling and assembling the armrest assembly 20, and improves the user's experience.

[0085] In some embodiments, in the unfolded state, the first locking assembly 30 is in the locked state, the backrest assembly 40 is separated from the armrest assembly 20, and the backrest assembly 40 is rotatable within a predetermined angle range, and the backrest assembly 40 cannot drive the armrest assembly 20 to rotate when the backrest assembly 40 rotates.

[0086] For example, the backrest assembly 40 has multiple unfolded states and can be switched by rotation, the first locking assembly 30 includes a locking block 31 and a transmission member 32, the locking block 31 is arranged inside the armrest assembly 20 and is movable relative to the armrest assembly 20, and the transmission member 32 is fixedly connected to the armrest assembly 20. In the locked state, the locking block 31 protrudes from the transmission member 32 and is arranged in the first locking groove 111, and the armrest assembly 20 and the transmission member 32 are locked and cannot rotate relative to the frame assembly 10. The backrest assembly 40 includes a displacement slot 41, the locking block 31 is arranged in the displacement slot 41, and the length of the displacement slot 41 is greater than the length of the locking block 31. When the backrest assembly 40 rotates within the predetermined angle range, the locking block 31 slides in the displacement slot 41, and the backrest assembly 40 is not connected to the transmission member 32, and the backrest assembly 40 cannot drive the armrest assembly 20 to rotate.

[0087] In some embodiments, the stroller 100 further includes a second locking assembly 42, which is arranged on the backrest assembly 40 and switches between the locked and unlocked states of the backrest assembly 40 and the frame assembly 10.

[0088] Specifically, in the locked state, the second locking assembly 42 is arranged in the frame assembly 10, and the relative position of the backrest assembly 40 and the frame assembly 10 is locked and fixed and cannot rotate; in the unlocked state, the second locking assembly 42 exits the frame assembly 10, and the backrest assembly 40 is rotatable relative to the frame assembly 10 and is folded in the folding direction.

[0089] Optionally, the second locking assembly 42 can include two, and the two second locking assemblies 42 can be symmetrically arranged on the backrest assembly 40 in the left-right direction, and in the locked state, the positions of the backrest assembly 40 are simultaneously locked, and in the unlocked state, the locking of the backrest assembly 40 is simultaneously unlocked.

[0090] In combination with Figure 4 , Figure 14 and Figure 19 , in some embodiments, the frame assembly 10 is provided with multiple second locking grooves 114 in the rotation direction of the backrest assembly 40, the second locking assembly 42 includes a latch 421, the latch 421 is movable in a direction parallel to the rotation axis of the backrest assembly 40, in the unfolded state, the latch 421 is selectively arranged in the second locking groove 114, and when the latch 421 is located in different second locking grooves 114, the backrest assembly 40 is located in different unfolded states.

[0091] For example, the plurality of second locking grooves 114 includes three second locking grooves 114, which are distributed circumferentially around the direction of the rotation axis of the backrest assembly 40. Before adjusting the backrest assembly 40 to different unfolded states, the latch 421 needs to be withdrawn from the current second locking groove 114 and the backrest assembly 40 needs to be unlocked, so that the backrest assembly 40 can rotate relative to the frame assembly 10. In the projection in the front-rear direction, when the latch 421 on the backrest assembly 40 is inserted into the front second locking groove 114, the backrest assembly 40 is in the minimum unfolded state; when the latch 421 is inserted into the middle second locking groove 114, the backrest is in the intermediate unfolded state; and when the latch 421 is inserted into the rear second locking groove 114, the backrest assembly 40 is in the maximum unfolded state.

[0092] Optionally, the second locking assembly 42 can include a resilient member, which can be connected to the latch 421. Pressing the resilient member can make the latch 421 withdraw from the current second locking groove 114, and the latch 421 can press the resilient member. When the backrest assembly 40 rotates to the next second locking groove 114, the resilient member is released, and the resilient member releases the elastic force to automatically insert the latch 421 into the next second locking groove 114 parallel to the direction of the rotation axis of the backrest assembly 40. The latch 421 can be a cylindrical latch 421, which has high strength and hardness. The second locking groove 114 can be a circular groove and can cooperate with the cylindrical latch 421, which can ensure the stability of the connection between the backrest assembly 40 and the frame assembly 10.

[0093] In some embodiments, the frame assembly 10 includes a seat cushion and a fixed seat 11 connected to the rear end of the seat cushion. The armrest assembly 20 and the backrest assembly 40 are rotationally connected to the fixed seat 11. In the unfolded state, the first locking assembly 30 locks the armrest assembly 20 to the fixed seat 11. In the unlocked state, the backrest assembly 40 drives the first locking assembly 30 to be unlocked, and the armrest assembly 20 rotates relative to the fixed seat 11.

[0094] For example, the fixed seat 11 is distributed with two along the left and right directions, and is arranged on the left and right sides of the cushion respectively. The armrest assembly 20 comprises two swing arms 21 distributed along the left and right directions, the swing arm 21 on the left side is rotationally connected with the fixed seat 11 on the left side, and the swing arm 21 on the right side is rotationally connected with the fixed seat 11 on the right side. The end of the swing arm 21 is provided with a first locking assembly 30. The first locking assembly 30 comprises a locking block 31 and a transmission member 32, and in the unfolded state, the two locking blocks 31 are respectively arranged in the corresponding fixed seat 11, and the corresponding swing arm 21 and the fixed seat 11 are locked. When the stroller 100 is folded, the backrest assembly 40 is rotated along the folding direction, the backrest assembly 40 drives the two locking blocks 31 to exit the corresponding fixed seat 11 respectively, and meanwhile, the two sides of the backrest assembly 40 are fixed in the relative position of the two transmission members 32, the backrest assembly 40 continues to rotate to drive the two transmission members 32 to rotate, the two transmission members 32 drive the swing arm 21 to rotate along the folding direction, and the backrest assembly 40 drives the armrest assembly 20 to rotate to the folded state.

[0095] Optionally, the fixed seat 11 can be provided with an elastic button, the cushion can be provided with a button hole, the elastic button can be arranged in the button hole, and the fixed seat 11 is fixed on the cushion; the rear end of the fixed seat 11 can be provided with a boss, the range of the backrest assembly 40 rotating backward can be limited, and the stroller 100 is in the unfolded state, and the backrest assembly 40 can abut against the boss.

[0096] The stroller 100 of one specific embodiment of the utility model is described with reference to the drawings.

[0097] Combined Figures 1 to 19 , the armrest assembly 20, the backrest assembly 40 and the first locking assembly 30 rotate around the center line of the first rotation shaft 50. The armrest assembly 20 comprises two swing arms 21 symmetrically arranged along the left and right directions, the swing arm 21 is provided with the first locking assembly 30, the first locking assembly 30 comprises a locking block 31 and a transmission member 32, and the transmission member 32 is fixedly connected with the corresponding swing arm 21. When the stroller 100 is in the unfolded state, the first cylinder portion 23 and the second cylinder portion 323 are keyed connected, the elastic convex portion 231 extends into the positioning hole 3231, the locking block 31 extends out of the transmission member 32 and is arranged in the first locking groove 111, the left side transmission member 32 and the second swing arm 21 are fixed relative to the second fixed seat 11b, the right side transmission member 32 and the swing arm 21 are fixed relative to the fixed seat 11, the locking block 31 slides in the accommodation groove 41, the backrest assembly 40 is not connected with the two transmission members 32, and the backrest assembly 40 cannot drive the armrest assembly 20 to rotate. The two sides of the backrest assembly 40 are respectively provided with a positioning convex portion (not shown in the figure), the two transmission members 32 are provided with three first groove portions 3221, and the fixed seat 11 is provided with three second locking grooves 114.

[0098] The second locking assembly 42 is symmetrically arranged in the left-right direction, and in the projection in the front-rear direction, when the positioning convex part of the backrest assembly 40 is embedded into the front first slot part 3221, the left and right latches 421 are respectively inserted into the front second locking slot 114, and the backrest assembly 40 is located in the minimum unfolding state; when the positioning convex part of the backrest assembly 40 is embedded into the middle first slot part 3221, the left and right latches 421 are respectively inserted into the middle second locking slot 114, and the backrest assembly 40 is located in the middle unfolding state; when the positioning convex part of the backrest assembly 40 is embedded into the rear first slot part 3221, the left and right latches 421 are respectively inserted into the rear second locking slot 114, and the backrest assembly 40 is located in the maximum unfolding state. When the left and right latches 421 are simultaneously withdrawn from the current second locking slot 114, rotating the backrest assembly 40 can make the positioning convex part out of the current first slot part 3221 and enter other first slot parts 3221, and the left and right latches 421 are respectively inserted into the second locking slot 114 corresponding to the first slot part 3221.

[0099] When the child bicycle 100 is folded, the left and right latches 421 are simultaneously withdrawn from the second locking slot 114, the backrest assembly 40 is rotated in the folding direction, the two sides of the backrest assembly 40 are respectively abutted with the wedge-shaped surfaces 313 of the two locking blocks 31, and the two locking blocks 31 are extruded to exit the first locking slot 111, the locking block 31 is completely located in the corresponding swing arm 21, the locking of the swing arm 21 relative to the corresponding fixed seat 11 is unlocked, the positioning convex part is out of the first positioning slot part and embedded into the second slot part 3222, the second slot part 3222 is located at the end of the elastic part 322, the backrest assembly 40 is continuously rotated and extruded to the second slot part 3222, the elastic part 322 cannot be deformed, the positioning convex part cannot be out of the second slot part 3222, and the positions of the two transmission members 32 relative to the two sides of the backrest assembly 40 are fixed; the backrest assembly 40 is continuously rotated, the two transmission members 32 are rotated with the backrest assembly 40, the first rotating shaft 50 is rotated in the mounting hole 112, and the sliding part 51 is slid in the sliding groove 113, the transmission member 32 drives the corresponding swing arm 21 to rotate in the folding direction, the effect that the backrest assembly 40 is rotated to drive the folding of the handrail assembly 20 is realized, and the folding steps of the child bicycle 100 are reduced.

[0100] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0101] In addition, the terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0102] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the communication or interaction relationship between two elements, unless otherwise explicitly limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0103] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0104] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0105] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary, and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and modify the above embodiments within the scope of the utility model.

Claims

1. A stroller (100) having an unfolded state and a folded state, characterized in that, The stroller (100) comprises: a frame assembly (10); an armrest assembly (20) rotatably connected to the frame assembly (10); a first locking assembly (30) having a locked state for locking the armrest assembly (20) and the frame assembly (10) and an unlocked state for unlocking the armrest assembly (20) and the frame assembly (10); a backrest assembly (40) rotatably connected to the frame assembly (10), the backrest assembly (40) being configured to drive the first locking assembly (30) to unlock the armrest assembly (20) and the frame assembly (10) when moving in a folding direction towards the frame assembly (10), and the backrest assembly (40) being configured to be in driving connection with the armrest assembly (20) after the armrest assembly (20) and the frame assembly (10) are unlocked.

2. The stroller (100) according to claim 1, characterized in that The stroller (100) comprises a first rotation shaft (50), the armrest assembly (20) is rotatably connected to the frame assembly (10) around the first rotation shaft (50), the first locking assembly (30) comprises a locking block (31) movably connected to the armrest assembly (20) along a direction parallel to the first rotation shaft (50), the frame assembly (10) is provided with a first locking groove (111), the locking block (31) is arranged in the first locking groove (111) in the locked state and is arranged out of the first locking groove (111) in the unlocked state.

3. The stroller (100) according to claim 2, characterized in that The backrest assembly (40) is rotatably connected to the frame assembly (10) around the first rotation shaft (50), an end of the locking block (31) is provided with a wedge surface (313), the backrest assembly (40) is opposite to the wedge surface (313) in the folding direction, and the backrest assembly (40) is configured to abut against the wedge surface (313) and drive the locking block (31) to exit the first locking groove (111) when moving in the folding direction.

4. The stroller (100) according to claim 3, characterized in that The backrest assembly (40) is provided with a clearance groove (41), and the locking block (31) is arranged in the clearance groove (41).

5. The stroller (100) according to claim 4, characterized in that The clearance groove (41) is arranged as an arc-shaped groove extending along a direction around the first rotation shaft (50), the length of the clearance groove (41) in the direction around the first rotation shaft (50) is greater than the length of the locking block (31), and the locking block (31) is slidable along the clearance groove (41) in the unfolded state.

6. The stroller (100) according to any one of claims 2-5, characterized in that, The first locking assembly (30) further comprises a transmission member (32) connected to the armrest assembly (20), the transmission member (32) is rotatably connected to the frame assembly (10) around the first rotation shaft (50), the backrest assembly (40) is rotatably connected to the frame assembly (10) around the first rotation shaft (50), and the transmission member (32) is opposite to the backrest assembly (40) along a direction parallel to the first rotation shaft (50). One of the backrest assembly (40) and the transmission member (32) is provided with a positioning protrusion, and the other is provided with a positioning groove, the positioning protrusion is detachably embedded in the positioning groove along the direction around the first rotation shaft (50).

7. The stroller (100) according to claim 6, characterized in that The transmission member (32) comprises a main body portion (321) and an elastic portion (322), the elastic portion (322) and the main body portion (321) are distributed along the direction parallel to the first rotation shaft (50), and the elastic portion (322) and the main body portion (321) are spaced apart along the direction parallel to the first rotation shaft (50) to form an elastic groove, and the positioning groove is arranged on the side of the elastic portion (322) away from the main body portion (321).

8. The stroller (100) according to claim 7, characterized in that The positioning groove comprises a plurality of first grooves (3221), the plurality of first grooves (3221) are distributed along the direction around the first rotation shaft (50), and the positioning protrusion is selectively embedded in the first groove (3221) in the unfolded state. And / or, the positioning groove comprises a second groove (3222), the second groove (3222) is arranged at the end of the elastic portion (322) along the folding direction, and the positioning protrusion is embedded in the second groove (3222) after the armrest assembly (20) and the frame assembly (10) are unlocked.

9. The stroller (100) of claim 7, wherein, The first rotation shaft (50) is connected with the transmission member (32), the outer circumferential surface of the first rotation shaft (50) is provided with a sliding portion (51), the frame assembly (10) is provided with a mounting hole (112), the first rotation shaft (50) is rotationally fitted in the mounting hole (112), and the circumferential surface of the mounting hole (112) is provided with a sliding groove (113), and the sliding portion (51) is slidable along the sliding groove (113).

10. The stroller (100) of claim 6, wherein, The armrest assembly (20) comprises a first cylinder portion (23), the transmission member (32) comprises a second cylinder portion (323), and the first cylinder portion (23) is arranged in the second cylinder portion (323). Wherein, the first cylinder portion (23) and the second cylinder portion (323) are key connected; and / or, the first cylinder portion (23) is provided with an elastic protrusion (231), the second cylinder portion (323) is provided with a positioning hole (3231), and the elastic protrusion (231) is detachably inserted into the positioning hole (3231).

11. The stroller (100) of claim 1, wherein, In the unfolded state, the first locking assembly (30) is in the locked state, the backrest assembly (40) is separated from the armrest assembly (20), and the backrest assembly (40) is rotatable within a predetermined angle range.

12. The stroller (100) of claim 1, wherein, The stroller (100) further comprises: A second locking assembly (42) is arranged on the backrest assembly (40) and switches between the states of locking and unlocking the backrest assembly (40) and the frame assembly (10).

13. The stroller (100) according to claim 12, characterized in that A plurality of second locking grooves (114) are arranged on the frame assembly (10) in the rotating direction of the backrest assembly (40), and the second locking assembly (42) comprises a bolt (421) which is movable in a direction parallel to the rotating axis of the backrest assembly (40), and the bolt (421) is selectively arranged in the second locking grooves (114) in the unfolded state.

14. The stroller (100) of claim 1, wherein, The frame assembly (10) comprises a seat cushion and a fixed seat (11), the fixed seat (11) is connected to the rear end of the seat cushion, and the armrest assembly (20) and the backrest assembly (40) are rotatably connected to the fixed seat (11).

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