Stroller

Abstract

The utility model discloses a kind of child stroller, it relates to stroller technical field.The technical solution points thereof include folding frame and folding seat pocket;Folding frame includes frame folding joint, front support assembly, rear support assembly and upper support assembly;Folding seat pocket includes seat pocket folding joint, seat rod assembly, handrail assembly and backrest assembly;Folding frame is folded, and front support assembly rotates to lower, and drives folding seat pocket to rotate;Folding seat pocket is initiated folding by the upward rotation of seat rod assembly relative to backrest assembly.The utility model can realize the automatic folding of whole vehicle by the folding mode and gravity effect of folding frame and folding seat pocket, it is simple and convenient to operate, and simple structure can reduce cost.

Description

Technical Field

[0001] This utility model relates to the field of children's vehicle technology, and more specifically, to a children's stroller. Background Technology

[0002] A Chinese patent with authorization announcement number CN223456989U discloses an automatically foldable child stroller, which includes a frame unit, a foldable child seat, and a locking mechanism. The frame unit includes a push rod assembly, a front support assembly, a rear support assembly, and a frame folding linkage assembly. The foldable child seat includes a fixed seat, a seat surface that rotates relative to the fixed seat, and a backrest frame. The locking mechanism includes a backrest locking assembly, a seat surface locking assembly, and a frame locking assembly. The backrest frame is unlocked by the backrest frame unlocking component of the backrest locking assembly, and the seat surface and frame unit are unlocked by the seat surface unlocking component of the seat surface locking assembly.

[0003] However, the stroller in the aforementioned patent still has the following problems: the locking mechanism integrates three locking components, which are linked to unlock, resulting in a relatively complex structure, and the child seat cannot be folded separately. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a children's stroller that can achieve automatic folding of the whole stroller by means of folding frame and folding seat and gravity. It is simple and convenient to operate, and the simple structure can reduce costs.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A stroller includes a folding frame and a folding seat; the folding frame includes a frame folding joint, a front support assembly, a rear support assembly, and an upper support assembly; the folding seat includes a seat folding joint, a seat post assembly, an armrest assembly, and a backrest assembly. The frame folding joint includes a frame joint base and a frame movable joint, and the frame movable joint is connected to the push rod assembly; The seat folding joint includes a seat joint base that is circumferentially linked to the movable joint of the frame. When the folding frame is folded, the front support assembly rotates forward and downward, causing the folding seat to rotate; The folding seat is initiated by rotating the seat post assembly upward relative to the backrest assembly.

[0006] Furthermore, the front support assembly is fixedly connected to the frame joint base, and the stroller also includes a limiting member that can contact the seat post assembly; The upper support assembly drives the folding seat pocket to rotate until the seat pole assembly contacts the limiting member, causing the folding seat pocket to fold.

[0007] Furthermore, the limiting member is disposed on the front support assembly, and the limiting member includes a limiting rod located below the seat post assembly.

[0008] Furthermore, the seat folding joint also includes a first seat movable joint connected to the seat post assembly, a second seat movable joint connected to the armrest assembly, and a third seat movable joint connected to the backrest assembly. A seat joint locking component is provided between the second seat joint and the seat joint base, and a seat joint unlocking component is provided on the first seat joint. A backrest angle adjustment component is provided between the third seat joint and the seat joint base.

[0009] Furthermore, the seat joint locking assembly includes a locking block and a first elastic member, a first locking groove is provided in the seat joint base to support the locking block and the first elastic member, and a second locking groove is provided in the second seat movable joint to cooperate with the locking block. Under the elastic force of the first elastic element, the locking block moves along the first locking groove to be embedded in the second locking groove, thereby achieving locking; The seat joint unlocking component drives the locking block to move out of the second locking groove, thereby unlocking the seat.

[0010] Furthermore, a movable block that contacts the locking block is provided in the second locking groove, and the seat joint unlocking component unlocks by driving the locking block to move away from the second locking groove through the movable block.

[0011] Furthermore, the seat joint unlocking component includes an unlocking plate fixedly disposed on the end face of the first seat movable joint, and the unlocking plate is provided with an unlocking drive inclined surface.

[0012] Furthermore, the backrest angle adjustment assembly includes an adjustment block disposed within the third seat pocket movable joint, and the adjustment block is provided with an adjustment latch embedded in the seat pocket joint base; The end face of the seat joint base is provided with an adjustment arc groove, and the inner circumferential side wall of the adjustment arc groove is provided with multiple slots that cooperate with the adjustment lock tongue.

[0013] Furthermore, the front support assembly is fixedly connected to the frame joint base, and the rear support assembly is rotatably connected to the frame joint base; the folding frame also includes a front wheel assembly rotatably connected to the front support assembly, a rear wheel assembly connected to the rear support assembly, and a frame linkage assembly; When the upper support assembly rotates and folds relative to the front support assembly, the frame linkage assembly drives the front wheel assembly to rotate and fold relative to the front support assembly, and the frame linkage assembly also drives the rear support assembly to rotate and fold relative to the front support assembly.

[0014] Furthermore, the frame linkage assembly includes a first drive member and a linkage assembly that is rotatably connected to the first drive member and the front wheel assembly respectively; The first driving member is fixedly connected to the upper support assembly; or, the first driving member is rotatably connected to the front support assembly, and the upper support assembly is provided with a driving surface that can rotate to contact the first driving member. The frame linkage assembly further includes a first driven member rotatably connected to the first driving member and the linkage assembly respectively, and the first driven member is rotatably connected to the rear support assembly; or, the frame linkage assembly further includes a second driving member fixedly connected to the first driving member, and a second driven member fixedly disposed on the rear support assembly, the second driving member engaging with the second driven member and transmitting driving force.

[0015] In summary, this utility model has the following beneficial effects: 1. For folding seats, folding is initiated by the seat post assembly rotating upward relative to the backrest assembly; for folding frames, folding is initiated by the upper support assembly rotating forward and downward. Therefore, although there is no linkage unlocking structure between the seat folding joint and the frame folding joint, the automatic folding of the entire vehicle can be achieved through the folding method of the folding frame and folding seat, as well as the effect of gravity, or simply by setting a limiting rod on the front support assembly that contacts the seat post assembly. The operation is simple and convenient, and the simple structure can reduce costs. 2. A seat joint locking component and a backrest angle adjustment component are respectively installed in the seat folding joint. The seat joint locking component and the backrest angle adjustment component are independent of each other. This allows the seat rod component to unlock the armrest component and drive the armrest component to fold towards the backrest component during the rotation and folding process. It also allows the angle of the backrest component to be adjusted independently, thus optimizing the user experience. 3. During the rotation and folding process, the seat pole assembly drives the canopy pole assembly to slide and retract via the support rod, which optimizes the folded volume, facilitates storage, and improves the user experience; 4. The frame linkage component enables automatic folding of the front wheel assembly and the rear support assembly, which simplifies operation, optimizes user experience, and optimizes the size of the frame after folding, making it easier to store. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the stroller structure in Example 1. Figure 1 ; Figure 2This is a schematic diagram of the stroller structure in Example 1. Figure 2 ; Figure 3 This is a schematic diagram of the stroller structure in Example 1. Figure 3 ; Figure 4 This is a schematic diagram of the folding frame in Example 1; Figure 5 This is a schematic diagram of the frame folding joint and frame linkage mechanism in Example 1. Figure 1 ; Figure 6 This is a schematic diagram of the frame folding joint and frame linkage mechanism in Example 1. Figure 2 ; Figure 7 This is a schematic diagram of the folding seat pocket in Example 1; Figure 8 This is a schematic diagram of the seat folding joint in Example 1. Figure 1 ; Figure 9 This is a schematic diagram of the seat folding joint in Example 1. Figure 2 ; Figure 10 This is a schematic diagram of the structure of the second seat movable joint and movable block in Example 1; Figure 11 This is a schematic diagram of the structure of the first seat joint and the seat joint drive in Embodiment 1; Figure 12 This is a schematic diagram of the seat folding joint in Example 1. Figure 3 ; Figure 13 This is a schematic diagram of the backrest angle adjustment component in Example 1; Figure 14 This is a schematic diagram of the stroller in Example 2; Figure 15 This is a schematic diagram of the stroller in Example 3.

[0017] In the diagram: 1. Frame folding joint; 11. Frame joint base; 111. Axle tube; 12. Frame movable joint; 121. First drive surface; 122. Second drive surface; 13. Drive seat; 2. Front support assembly; 21. Front wheel assembly; 211. Front wheel axle; 212. Extension arm; 22. Limiting rod; 3. Rear support assembly; 31. Rear wheel assembly; 4. Upper support assembly; 51. First drive member; 511. Axle hole; 52. First follower; 53. First connecting rod; 54. Second connecting rod; 55. Second drive member; 56. Second follower; 6. Seat folding joint; 61. Seat joint base; 611. First locking groove; 612. Adjustment arc groove; 613. Slot. 62. First seat pocket movable joint; 621. Unlocking plate; 622. Unlocking drive ramp; 63. Second seat pocket movable joint; 631. Second locking groove; 632. Third clearance arc groove; 633. Limiting groove; 634. First protrusion; 635. Second protrusion; 64. Third seat pocket movable joint; 641. First clearance arc groove; 642. Second clearance arc groove; 643. Guide groove; 65. Locking block; 66. First elastic element; 67. Movable block; 671. Limiting rib; 68. Adjusting block; 681. Adjusting latch; 69. Second elastic element; 7. Seat post assembly; 71. Footrest assembly; 8. Armrest assembly; 9. Backrest assembly; 91. Canopy rod assembly; 92. Support rod. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law. Example 1:

[0020] A type of stroller, referring to Figures 1 to 13 The bicycle includes a folding frame and a folding seat, which are detachably connected. Specifically, the folding frame includes a frame folding joint 1, a front support assembly 2, a front wheel assembly 21, a rear support assembly 3, a rear wheel assembly 31, an upper support assembly 4, and a frame linkage assembly. The folding seat includes a seat folding joint 6, a seat post assembly 7, a footrest assembly 71, an armrest assembly 8, a backrest assembly 9, and a canopy rod assembly 91.

[0021] Reference Figures 1 to 13In this embodiment, the seat folding joint 6 and the frame folding joint 1 are detachably connected by a locking component, thereby realizing the detachable connection between the folding seat and the folding frame. The folding seat is folded around the seat folding joint 6, and the folding frame is folded around the frame folding joint 1. There is no linkage unlocking structure between the seat folding joint 6 and the frame folding joint 1, which simplifies the structure, facilitates assembly, and reduces costs.

[0022] Reference Figures 1 to 6 In this embodiment, the front support assembly 2, the rear support assembly 3, and the upper support assembly 4 are respectively connected to the frame folding joint 1, realizing the rotational connection between the upper support assembly 4 and the front support assembly 2, and the rotational connection between the rear support assembly 3 and the front support assembly 2; the front wheel assembly 21 is rotatably connected to the bottom of the front support assembly 2, and the rear wheel assembly 31 is connected to the bottom of the rear support assembly 3.

[0023] Reference Figures 1 to 6 Specifically, the frame folding joint 1 includes a frame joint base 11, a frame movable joint 12, and a drive seat 13. The frame joint base 11 is fixedly connected to the front support assembly 2, the frame movable joint 12 is fixedly connected to the upper support assembly 4, and the drive seat 13 is fixedly connected to the rear support assembly 3. The frame movable joint 12 is rotatably connected to the frame joint base 11, thereby achieving a rotatable connection between the upper support assembly 4 and the front support assembly 2. The rear support assembly 3 is rotatably connected to the frame joint base 11, thereby achieving a rotatable connection between the rear support assembly 3 and the front support assembly 2. In addition, a locking component is provided inside the frame folding joint 1, and a corresponding unlocking component is provided on the upper support assembly 4. When the upper support assembly 4 is folded, the locking component inside the frame folding joint 1 is unlocked, allowing the upper support assembly 4 to rotate relative to the front support assembly 2. The unlocking component and the locking component are existing technologies and will not be described in detail here.

[0024] Reference Figures 1 to 6 Specifically, in this embodiment, the frame linkage assembly is connected to the front support assembly 2, the front wheel assembly 21, and the rear support assembly 3, and receives the driving force from the upper support assembly 4. When the upper support assembly 4 rotates and folds relative to the front support assembly 2, the frame linkage assembly drives the front wheel assembly 21 to rotate and fold relative to the front support assembly 2, and the frame linkage assembly drives the rear support assembly 3 to rotate and fold relative to the front support assembly 2. That is, in this embodiment, the frame linkage assembly can realize the automatic folding of the front wheel assembly 21 and the rear support assembly 3, thereby simplifying operation, optimizing user experience, and optimizing the volume of the folded front wheel assembly 21, making it convenient for storage.

[0025] Reference Figures 1 to 6Preferably, in this embodiment, the two front wheels of the front wheel assembly 21 are omnidirectional wheels; rotating the folded front wheels to be perpendicular to the rear wheels of the rear wheel assembly 31 can further optimize the volume of the frame after folding and facilitate storage.

[0026] Reference Figures 1 to 6 Specifically, in this embodiment, the frame linkage assembly includes a first driving member 51, a first driven member 52, and a linkage assembly, the linkage assembly including a first link 53 and a second link 54; wherein, the first driving member 51 is rotatably connected to the frame joint base 11; specifically, a shaft tube 111 is provided inside the frame joint base 11, and a shaft hole 511 is provided on the first driving member 51 to cooperate with the shaft tube 111; the first driving member 51 is sleeved on the shaft tube 111 through the shaft hole 511 and can rotate around the shaft tube 111; one end of the first driven member 52 is rotatably connected to the first driving member 51, and the other end is rotatably connected to the first link 53; and the middle position of the first driven member 52 is rotatably connected to the drive seat 13; the first link 53 is fixedly connected to the second link 54, and the second link 54 is rotatably connected to the front wheel assembly 21.

[0027] Reference Figures 1 to 6 The frame movable joint 12 is provided with a driving surface that can rotate to contact the first driving member 51; that is, the driving surface contacts the first driving member 51 to transmit driving force, so that the first driving member 51 rotates; specifically, the end face of the frame movable joint 12 is provided with an arc-shaped protrusion, and the two ends of the arc-shaped protrusion form the first driving surface 121 and the second driving surface 122 respectively, and a clearance stroke is formed between the first driving surface 121 and the second driving surface 122.

[0028] Reference Figures 1 to 6 The upper bracket assembly 4 is folded by rotating it downwards in a counterclockwise direction. When the first driving surface 121 rotates to contact the first driving member 51, the upper bracket assembly 4 continues to rotate, driving the first driving member 51 to rotate in a counterclockwise direction. After the first driving member 51 rotates, it drives the front wheel assembly 21 to rotate in a counterclockwise direction through the first driven member 52 and the connecting rod assembly. It also drives the rear bracket assembly 3 to rotate in a clockwise direction through the first driven member 52, thereby realizing the folding of the frame.

[0029] Reference Figures 1 to 6When unfolded, the upper support assembly 4 is rotated upwards clockwise. When the second driving surface 122 rotates to contact the first driving member 51, the upper support assembly 4 continues to rotate, driving the first driving member 51 to rotate clockwise. After the first driving member 51 rotates, it drives the front wheel assembly 21 to rotate clockwise through the first driven member 52 and the connecting rod assembly, and drives the rear support assembly 3 to rotate counterclockwise through the first driven member 52, thereby realizing the unfolding of the frame. In the unfolded state, the rotation axis between the first driving member 51 and the frame joint base 11, the rotation axis between the first driving member 51 and the first driven member 52, and the rotation axis between the first driven member 52 and the drive seat 13 are all on the same straight line, and form a triangle with the rotation axis between the drive seat 13 and the rear support assembly 3, thus forming an unfolded and locked state, improving stability and safety.

[0030] Reference Figures 1 to 6 In this embodiment, the first drive component 51 is loosely fitted onto the frame joint base 11, and then receives the driving force from the upper bracket assembly 4 by contacting the drive surface. This facilitates assembly and avoids interference. In other optional embodiments, the first drive component 51 can also be fixedly connected to the frame movable joint 12, in which case the upper bracket assembly 4 and the first drive component 51 rotate synchronously. This is not a limitation.

[0031] Reference Figures 1 to 6 Specifically, the front wheel assembly 21 includes a front wheel axle 211 rotatably connected to the front bracket assembly 2, and an extension arm 212 rotatably connected to the second link 54 is provided on the front wheel axle 211. The extension arm 212 is rotatably connected to the second link 54, which has the advantages of simple structure and convenient assembly.

[0032] Reference Figures 1 to 6 Preferably, when the frame is in the unfolded state, the angle between the front support assembly 2 and the first link 53 is less than or equal to 15°, which makes the frame structure more compact; specifically, as shown in the example Figure 2 As shown, in the unfolded state, the front support assembly 2 and the first connecting rod 53 are arranged almost parallel to each other; in this embodiment, the front support assembly 2 is U-shaped, including a horizontal bar and two vertical bars; the first connecting rod 53 is also U-shaped, including a horizontal bar and two vertical bars; that is, in the unfolded state, the angle between the vertical bars of the front support assembly 2 and the vertical bars of the first connecting rod 53 is less than or equal to 15°.

[0033] Reference Figures 1 to 13The seat folding joint 6 includes a seat joint base 61, a first seat movable joint 62 connected to the seat post assembly 7, a second seat movable joint 63 connected to the armrest assembly 8, and a third seat movable joint 64 connected to the backrest assembly 9; wherein, the foot support assembly 71 is rotatably connected to the seat post assembly 7, the canopy rod assembly 91 is slidably connected to the backrest assembly 9, and the canopy rod assembly 91 is provided with a support rod 92 between the first seat movable joint 62; in addition, the foot support assembly 71 and the canopy rod assembly 91 can be rotated and adjusted independently.

[0034] Reference Figures 1 to 13 The first seat joint 62, the second seat joint 63, the third seat joint 64, and the seat joint base 61 are arranged sequentially along the axial direction, and the first seat joint 62, the second seat joint 63, and the third seat joint 64 can rotate around the same pivot axis respectively; the seat joint base 61 is connected to the frame joint 12 through a locking assembly, so the seat joint base 61 and the frame joint 12 are linked in the circumferential direction.

[0035] Reference Figures 1 to 13 In this embodiment, a seat joint locking component is provided between the second seat joint 63 and the seat joint base 61, and a seat joint unlocking component is provided on the first seat joint 62; that is, when the first seat joint 62 rotates, it drives the seat joint unlocking component to rotate, and the seat joint unlocking component drives the seat joint locking component to unlock, so that the second seat joint 63 can rotate; a backrest angle adjustment component is provided between the third seat joint 64 and the seat joint base 61, so that the angle of the backrest component 9 can be adjusted.

[0036] Reference Figures 1 to 13 In this embodiment, a seat joint locking component and a backrest angle adjustment component are respectively provided in the seat folding joint 6. The seat joint locking component and the backrest angle adjustment component are independent of each other. This allows the seat rod component 7 to unlock the armrest component 8 and drive the armrest component 8 to fold towards the backrest component 9 during the rotation and folding process. It also allows the angle of the backrest component 9 to be adjusted independently, thus optimizing the user experience. Moreover, during the rotation and folding process, the seat rod component 7 drives the canopy rod component 91 to slide and retract through the support rod 92, which can optimize the folded volume, facilitate storage, and optimize the user experience.

[0037] Reference Figures 1 to 13Specifically, in this embodiment, the seat joint locking assembly includes a locking block 65 and a first elastic member 66. A first locking groove 611 is provided in the seat joint base 61 to support the locking block 65 and the first elastic member 66. The first locking groove 611 extends along the pivot axis of the seat folding joint, so the locking block 65 can move axially along the first locking groove 611. The first elastic member 66 is a spring, one end of which contacts the locking block 65, and the other end contacts the inner end face of the first locking groove 611. The first locking groove 611 has an end face opening, so the elastic force of the first elastic member 66 makes the locking block 65 tend to extend out of the end face opening.

[0038] Reference Figures 1 to 13 The second seat movable joint 63 is provided with a second locking groove 631 that cooperates with the locking block 65. When the locking block 65 extends out from the first locking groove 611 and is embedded in the second locking groove 631, the locking block 65 is simultaneously located in the first locking groove 611 and the second locking groove 631, thereby achieving locking and preventing the second seat movable joint 63 from rotating relative to the seat joint base 61.

[0039] Reference Figures 1 to 13 The third seat joint 64 is located between the second seat joint 63 and the seat joint base 61. Therefore, the locking block 65 needs to pass through the third seat joint 64. In order to avoid interference, the third seat joint 64 is provided with a first clearance arc groove 641.

[0040] Reference Figures 1 to 13 In this embodiment, the seat joint unlocking component includes an unlocking plate 621 fixedly disposed on the end face of the first seat movable joint 62. The unlocking plate 621 is arc-shaped and is provided with an unlocking drive inclined surface 622. Preferably, in this embodiment, a movable block 67 that contacts the locking block 65 is also provided in the second locking groove 631.

[0041] Reference Figures 1 to 13 The seat post assembly 7 drives the first seat pocket movable joint 62 to rotate upward in a clockwise direction to fold. After the unlocking drive ramp 622 rotates to contact the movable block 67, the seat post assembly 7 continues to rotate, and the unlocking drive ramp 622 drives the movable block 67 and the locking block 65 to move axially. After the locking block 65 moves to disengage from the second locking groove 631, the second seat pocket movable joint 63 can be unlocked, and the second seat pocket movable joint 63 can rotate upward in a clockwise direction relative to the seat pocket joint base 61 to fold.

[0042] Reference Figures 1 to 13In this embodiment, a movable block 67 is provided between the unlocking plate 621 and the locking block 65. The movable block 67 is used to transmit the driving force, which allows the size of the unlocking drive ramp 622 to be controlled. This ensures that the driving force can be transmitted smoothly, avoiding jamming due to excessive resistance, and also optimizes the rotation angle of the first seat pocket movable joint 62 during the unlocking process, achieving a smooth rotation and folding process. Of course, in other optional embodiments, the unlocking drive ramp can also be in direct contact with the unlocking block, which is not a limitation here.

[0043] Reference Figures 1 to 13 Preferably, the end face of the second seat movable joint 63 is provided with a first protrusion 634 communicating with the second locking groove 631, and the first protrusion 634 is embedded in the first clearance arc groove 641; that is, the second locking groove 631 extends from the second seat movable joint 63 to the first protrusion 634; by using the first protrusion 634 to extend the second locking groove 631 to be close to and dock with the first locking groove 611, it can not only increase the contact length between the locking block 65 and the second locking groove 631 and improve the stability of locking, but also facilitate the locking block 65 to be quickly inserted into the second locking groove 631 during the reset process and relock.

[0044] Reference Figures 1 to 13 Preferably, the sidewall of the movable block 67 is symmetrically provided with limiting ribs 671, and the inner sidewall of the second locking groove 631 is provided with a limiting groove 633 that cooperates with the limiting ribs 671; one end of the limiting groove 633 is open and the other end is closed, and the closed inner end face forms a moving stop surface; under the elastic force of the first elastic member 66, the locking block 65 drives the movable block 67 to move until the limiting ribs 671 contact the moving stop surface; that is, when the seat mechanism is in the unfolded state, the limiting ribs 671 contact the moving stop surface, thereby maintaining stability.

[0045] Reference Figures 1 to 13 Specifically, the end face of the second pocket movable joint 63 is provided with a third clearance arc groove 632 that cooperates with the unlocking plate 621. The third clearance arc groove 632 communicates with the second locking groove 631. The unlocking plate 621 is embedded in the third clearance arc groove 632, thereby contacting the movable block 67 in the second locking groove 631 and driving the movable block 67 to move. Preferably, the end face of the second pocket movable joint 63 is provided with a second protrusion 635 that communicates with the third clearance arc groove 632. The third pocket movable joint 64 is provided with a second clearance arc groove 642 that cooperates with the second protrusion 635. The second clearance arc groove 642 communicates with the first clearance arc groove 641.

[0046] Reference Figures 1 to 13When the first seat pocket movable joint 62 rotates, the unlocking plate 621 rotates along the third clearance arc groove 632. After the unlocking drive inclined surface 622 contacts the movable block 67, it drives the movable block 67 to move to achieve unlocking. When the unlocking plate 621 contacts the end face of the third clearance arc groove 632, the second seat pocket movable joint 63 has been unlocked. Then the unlocking plate 621 drives the second seat pocket movable joint 63 to rotate and fold, realizing the linkage of the folding process. In addition, the contact between the unlocking plate 621 and the end face of the third clearance arc groove 632 also plays a limiting role, preventing the seat pole assembly 7 and the armrest assembly 8 from getting too close after folding.

[0047] Reference Figures 1 to 13 In this embodiment, the backrest angle adjustment assembly includes an adjustment block 68 disposed within the third seat pocket movable joint 64. The third seat pocket movable joint 64 is provided with a guide groove 643 that cooperates with the adjustment block 68. That is, the adjustment block 68 can move linearly along the guide groove 643, and the direction of movement of the adjustment block 68 is perpendicular to the pivot axis of the seat pocket folding joint. The adjustment block 68 extends into the backrest rod of the backrest assembly 9, and a second elastic member 69 is disposed between the adjustment block 68 and the backrest rod. The second elastic member 69 is a spring, and the elastic force of the spring causes the adjustment block 68 to tend to move downward toward the inner end face of the guide groove 643.

[0048] Reference Figures 1 to 13 The adjusting block 68 is provided with an adjusting latch 681 extending along the pivot axis and embedded in the seat joint base 61; the end face of the seat joint base 61 is provided with an adjusting arc groove 612, and the inner circumferential side wall of the adjusting arc groove 612 is provided with a plurality of slots 613 that cooperate with the adjusting latch 681.

[0049] Reference Figures 1 to 13 Under the elastic force of the second elastic element 69, the adjusting latch 681 is inserted into one of its slots 613, so that the backrest assembly 9 cannot rotate relative to the seat joint base 61, and the backrest angle is fixed. The backrest assembly 9 is provided with an unlocking wrench (not shown in the figure), and a cable located inside the backrest assembly 9 is provided between the unlocking wrench and the adjusting block 68. The driving force of the unlocking wrench is transmitted to the adjusting block 68 through the cable, so that the adjusting block 68 moves upward until the adjusting latch 681 disengages from the slot 613 and is located in the adjusting arc groove 612. The adjusting arc groove 612 provides a clearance stroke, so that the backrest assembly 9 can rotate relative to the seat joint base 61, thereby adjusting the backrest angle. After the backrest assembly 9 is rotated by a certain angle, the adjusting block 68 moves downward to reset under the action of the elastic force, so that the adjusting latch 681 is inserted into the corresponding slot 613, thereby maintaining the angle of the backrest assembly 9.

[0050] Reference Figures 1 to 13In this embodiment, three slots 613 are provided, so the backrest assembly 9 has three adjustable angles. In other optional embodiments, the number of slots 613 can be adjusted as needed, and is not limited here. The third seat pocket movable joint 64 is provided with a first clearance arc groove 641 and a second clearance arc groove 642. In the unlocked state, the third seat pocket movable joint 64 can rotate relative to the seat pocket joint base 61 to independently adjust the backrest angle, without being affected by other joints and components. Reference Figures 1 to 13 When the folding seat and folding frame are both in the unfolded state, fold the upper bracket assembly 4 and unlock the frame folding joint 1. Then, rotate the upper bracket assembly 4 forward and downward to fold the frame. When the upper bracket assembly 4 rotates, it causes the folding seat to rotate.

[0051] For the unfolded folding seat, gravity enables it to fold automatically during rotation.

[0052] That is, when the unfolded folding seat rotates with the upper support assembly 4, the seat post assembly 7 rotates relative to the backrest assembly 9 under the gravity of the seat post assembly 7, and unlocks the armrest assembly 8, thereby realizing the automatic folding of the seat and the synchronous folding of the frame and the seat.

[0053] Depending on the weight of the seat post assembly 7, there are two folding processes.

[0054] The first scenario is that when the seat post assembly 7 rotates to a near-vertical position, it cannot continue to rotate under its own weight, while the backrest assembly 9 and armrest assembly 8 continue to rotate. In this case, the seat post assembly 7 rotates relative to the backrest assembly 9 and unlocks the armrest assembly 8, thus achieving automatic folding of the seat pocket.

[0055] The second method involves rotating the seat post assembly 7 beyond the vertical position, switching the rotation direction of the seat post assembly 7 downwards, and under the action of gravity, rotating the seat post assembly 7 relative to the backrest assembly 9, and unlocking the armrest assembly 8 to achieve automatic folding of the seat pocket.

[0056] Of course, in other alternative embodiments, if the automatic folding of the seat is not achieved by gravity, the seat post assembly 7 can be manually rotated to fold the unfolded seat after the frame is folded, and there is no limitation on this.

[0057] Therefore, although there is no linkage unlocking structure between the seat folding joint 6 and the frame folding joint 1, the entire vehicle can be automatically folded by the folding method of the folding frame and the folding seat, as well as by gravity. The operation is simple and convenient, and the simple structure can reduce costs. Of course, the seat can also be folded actively first, and then the frame can be folded. In this case, the upper bracket assembly 4 will drive the folded seat to rotate, thereby folding the entire vehicle. There are no restrictions on this. Example 2:

[0058] A type of stroller, referring to Figures 1 to 14 Based on Embodiment 1, the difference between this embodiment and Embodiment 1 is that: in this embodiment, the front support assembly 2 is provided with a limiting member that can contact the seat post assembly 7; specifically, the limiting member includes a limiting rod 22 located below the seat post assembly 7; the limiting member is used to contact the seat post assembly, so the specific structure is not limited to the limiting rod in this embodiment; in other optional embodiments, the limiting member can also be installed on other components of the stroller, as long as it can contact the seat post assembly to achieve the limiting function, and there is no limitation here.

[0059] Reference Figures 1 to 14 When both the folding seat and the folding frame are in the unfolded state, the upper support assembly 4 is folded to unlock the frame folding joint 1. Then, the upper support assembly 4 is rotated forward and downward to fold the frame. When the upper support assembly 4 rotates, it causes the folding seat to rotate. When the seat post assembly 7 contacts the limit rod 22, it can no longer rotate, while the backrest assembly 9 continues to rotate downward with the upper support assembly 4, thereby unlocking the folding seat and folding the frame and seat simultaneously.

[0060] Reference Figures 1 to 14 For the folding seat, folding is initiated by the seat post assembly 7 rotating upward relative to the backrest assembly 9; for the folding frame, folding is initiated by the upper support assembly 4 rotating forward and downward. Therefore, although there is no linkage unlocking structure between the seat folding joint 6 and the frame folding joint 1, the automatic folding of the entire vehicle can be achieved simply by setting a limiting rod 22 on the front support assembly 2 that contacts the seat post assembly 7. The operation is simple and convenient, and the simple structure can reduce costs. The use of the limiting rod 22 also makes the folded seat more compact. Example 3:

[0061] A type of stroller, referring to Figures 1 to 15 Based on Embodiment 1 or Embodiment 2, the difference between this embodiment and Embodiment 1 or Embodiment 2 is that: in this embodiment, the frame linkage assembly eliminates the first driven member between the first driving member 51 and the first connecting rod 53, and also includes a second driving member 55 fixedly connected to the first driving member 51, and a second driven member 56 fixedly mounted on the rear support assembly 3; that is, the upper support assembly 4, the first driving member 51 and the second driving member 55 rotate synchronously, the first driving member 51 is directly rotatably connected to the first connecting rod 53 and drives the front wheel assembly 21 to rotate and fold, and the second driving member 55 engages with the second driven member 56 and drives the rear support assembly 3 to rotate and fold.

[0062] Reference Figures 1 to 15In this embodiment, the first driving member 51 and the linkage assembly form the first linkage path, and the second driving member 55 and the second driven member 56 form the second linkage path. The two linkage paths are independent of each other, which simplifies the structure and reduces the probability of linkage mechanism failure. Moreover, even if the first linkage path fails, the frame can be folded through the second linkage path, which facilitates transportation and maintenance.

[0063] Reference Figure 15 Specifically, in this embodiment, the second driving member 55 and the second driven member 56 are driven by gear meshing, which makes the structure simple and the transmission stable. In other optional embodiments, the second driving member 55 and the second driven member 56 can also be driven by other means of engagement, which is not limited here.

Claims

1. A stroller, comprising a folding frame and a folding seat; the folding frame comprising a frame folding joint, a front support assembly, a rear support assembly, and an upper support assembly; the folding seat comprising a seat folding joint, a seat post assembly, an armrest assembly, and a backrest assembly; The frame folding joint includes a frame joint base and a frame movable joint, and the frame movable joint is connected to the push rod assembly; The seat folding joint includes a seat joint base that is circumferentially linked to the movable joint of the frame. Its features are: When the folding frame is folded, the front support assembly rotates forward and downward, causing the folding seat to rotate; The folding seat is initiated by rotating the seat post assembly upward relative to the backrest assembly.

2. The stroller according to claim 1, characterized in that: The seat folding joint also includes a first seat movable joint connected to the seat post assembly, a second seat movable joint connected to the armrest assembly, and a third seat movable joint connected to the backrest assembly. A seat joint locking component is provided between the second seat joint and the seat joint base, and a seat joint unlocking component is provided on the first seat joint. A backrest angle adjustment component is provided between the third seat joint and the seat joint base.

3. The stroller according to claim 2, characterized in that: The seat joint locking assembly includes a locking block and a first elastic element. The seat joint base is provided with a first locking groove that supports the locking block and the first elastic element. The second seat movable joint is provided with a second locking groove that cooperates with the locking block. Under the elastic force of the first elastic element, the locking block moves along the first locking groove to be embedded in the second locking groove, thereby achieving locking; The seat joint unlocking component drives the locking block to move out of the second locking groove, thereby unlocking the seat.

4. The stroller according to claim 3, characterized in that: The second locking groove is provided with a movable block that contacts the locking block. The seat joint unlocking component unlocks the seat by driving the locking block to move away from the second locking groove through the movable block.

5. The stroller according to claim 2, characterized in that: The seat joint unlocking component includes an unlocking plate fixedly disposed on the end face of the first seat movable joint, and the unlocking plate is provided with an unlocking drive slope.

6. The stroller according to claim 2, characterized in that: The backrest angle adjustment component includes an adjustment block disposed in the third seat pocket joint, and the adjustment block is provided with an adjustment latch embedded in the seat pocket joint base; The end face of the seat joint base is provided with an adjustment arc groove, and the inner circumferential side wall of the adjustment arc groove is provided with multiple slots that cooperate with the adjustment lock tongue.

7. The stroller according to claim 1, characterized in that: The front support assembly is fixedly connected to the frame joint base, and the rear support assembly is rotatably connected to the frame joint base; the folding frame also includes a front wheel assembly rotatably connected to the front support assembly, a rear wheel assembly connected to the rear support assembly, and a frame linkage assembly. When the upper support assembly rotates and folds relative to the front support assembly, the frame linkage assembly drives the front wheel assembly to rotate and fold relative to the front support assembly, and the frame linkage assembly also drives the rear support assembly to rotate and fold relative to the front support assembly.

8. The stroller according to claim 7, characterized in that: The frame linkage assembly includes a first drive component and a linkage assembly that is rotatably connected to the first drive component and the front wheel assembly, respectively. The first driving member is fixedly connected to the upper support assembly; or, the first driving member is rotatably connected to the front support assembly, and the upper support assembly is provided with a driving surface that can rotate to contact the first driving member. The frame linkage assembly further includes a first driven member rotatably connected to the first driving member and the linkage assembly respectively, and the first driven member is rotatably connected to the rear support assembly; or, the frame linkage assembly further includes a second driving member fixedly connected to the first driving member, and a second driven member fixedly disposed on the rear support assembly, the second driving member engaging with the second driven member and transmitting driving force.

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