A child's pushchair seat assembly

Abstract

The utility model discloses child stroller seat subassembly, including the carding seat, the seat of carding seat is connected with, and the seat part includes the bearing plate and the extension board, and the extension board lower part outside fixedly established can with the lower connecting shell of carding seat rotary connection, the extension board upper part inside fixedly established has the upper connecting shell, and the upper connecting shell is connected with the backrest part that can rotate relative to the seat part, and the backrest part includes the backrest board and sets up the connecting seat of backrest board both sides lower part, and the connecting seat is rotated and is connected with the upper connecting shell, and the lower connecting shell is equipped with first locking mechanism with carding seat between for locking seat part and carding seat, and the upper connecting shell is equipped with second locking mechanism with connecting seat between for locking backrest part and seat part, and the backrest part is equipped with the unlocking piece for unlocking second locking mechanism, and the connecting seat is equipped with first linkage between first locking mechanism and can drive first locking mechanism unlocking when backrest part relative seat part rotates and folds. The utility model discloses simple structure, and the unlocking operation is convenient.

Description

[Technical Field]

[0001] This utility model relates to a child stroller seat assembly. [Background Technology]

[0002] Strollers are common products used by infants and toddlers during their growth. Most current strollers consist of a foldable frame and a seat assembly attached to the frame. To fold the stroller, first unlock the locking mechanism between the backrest and the seat assembly, then fold the backrest onto the seat. Next, unlock the locking mechanism between the seat and the frame to allow the seat to rotate and fold onto the frame. Finally, unlock the frame's locking mechanism to complete the folding process. Therefore, current strollers involve numerous unlocking steps, making the folding operation inconvenient.

[0003] Therefore, this utility model was created based on the above-mentioned shortcomings. [Utility Model Content]

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a child stroller seat component with a simple structure and convenient unlocking operation.

[0005] This utility model is achieved through the following technical solution:

[0006] A stroller seat assembly includes a snap-fit ​​connector that snaps onto a stroller frame. A seat portion is connected to the snap-fit ​​connector. The seat portion includes a support plate and extension plates extending upward from both sides of the support plate. A lower connecting shell, rotatably connected to the snap-fit ​​connector, is fixed to the lower outer side of the extension plates. An upper connecting shell is fixed to the upper inner side of the extension plates. A backrest, rotatably unfolded or folded relative to the seat portion, is connected to the upper connecting shell. The backrest includes a backrest panel and connecting seats located on the lower sides of the backrest panel. The connecting seats are rotatably connected to the upper connecting shell. A first locking mechanism for locking the seat portion and the snap-fit ​​connector is provided between the lower connecting shell and the snap-fit ​​connector. A second locking mechanism for locking the backrest and the seat portion is provided between the upper connecting shell and the connecting seats. An unlocking element for unlocking the second locking mechanism is provided on the backrest. A first linkage element that drives the first locking mechanism to unlock when the backrest is rotatably folded relative to the seat portion is provided between the connecting seats and the first locking mechanism.

[0007] The locking seat is detachably connected to the joint seat on the stroller frame. The locking seat is provided with a third locking mechanism that can lock it onto the joint seat. The extension plate is provided with an operating member for unlocking the third locking mechanism after pressing. Furthermore, the operating end of the operating member is higher than the upper end of the joint seat.

[0008] The extension plate is also connected to an armrest on the front side. A front connecting shell is fixedly provided on the front side of the extension plate. A pivot shell that is rotatably connected to the front connecting shell is fixedly provided on the armrest. A fourth locking mechanism for locking the two is provided between the pivot shell and the front connecting shell. A second linkage component that can drive the fourth locking mechanism to unlock when the backrest is rotated and folded relative to the seat is provided between the connecting seat and the fourth locking mechanism.

[0009] The first locking mechanism includes a plurality of first locking grooves arranged circumferentially on the lower connecting shell, a plurality of first locking grooves arranged circumferentially on the locking seat, a first locking gear that can simultaneously engage with the first locking grooves and the first locking grooves is slidably arranged between the lower connecting shell and the locking seat, the first linkage is connected to the first locking gear so that when the backrest is rotated and folded, the first linkage pushes the first locking gear to disengage from the first locking groove, and a first return spring that can push the first locking gear to reset is provided between the lower connecting shell and the first locking gear.

[0010] The first linkage component includes a first linkage rod that slides through the locking seat. The first linkage rod has multiple first protrusions on one side, and each first protrusion has a first pushing inclined surface. The first locking gear has a first mating inclined surface that abuts against the first pushing inclined surface. The connecting seat has an insertion groove for the upper end of the first linkage rod to move relative to it. The front end of the insertion groove has a first pushing surface that can push the first linkage rod downward when the connecting seat rotates and folds relative to the seat part with the backrest. When the first linkage rod slides downward, the first pushing inclined surface pushes the first mating inclined surface, causing the first locking gear to disengage from the first locking groove. The locking seat has an eighth return spring that can push the first linkage rod to reset.

[0011] The joint seat is provided with a protruding locking platform, and the locking seat is provided with a slot that can be inserted and engaged with the locking platform. The third locking mechanism includes a locking block that is slidably disposed on the locking seat and can engage or disengage with a locking hole on the joint seat. The operating component includes an operating rod that can slide longitudinally within the extension plate. The operating end is disposed on the upper end of the operating rod and protrudes from the upper end of the extension plate. The lower end of the operating rod is provided with an inclined surface that can push the locking block to disengage from the locking hole when it moves downward. A second return spring that can push the operating rod upward to reset is provided between the extension plate and the operating end. A third return spring that can push the locking block to reset is provided between the locking block and the locking seat.

[0012] The second locking mechanism includes multiple second locking slots arranged circumferentially on the connecting seat, and multiple second locking slots arranged circumferentially on the upper connecting shell. A second locking gear is slidably arranged between the upper connecting shell and the connecting seat, capable of engaging with the second locking slots and the second locking slots simultaneously. A rotatable movable block is provided between the second locking gear and the bottom of the upper connecting shell. Multiple inclined slots are provided on the movable block circumferentially. An inclined protrusion that cooperates with the inclined slots is provided on the second locking gear. The unlocking component includes a handle rotatably connected to the backrest. A pull rope that can pull the movable block to rotate is provided between the handle and the movable block. When the movable block rotates, the inclined slots and inclined protrusions on it cooperate, allowing the movable block to laterally push the second locking gear out of the second locking slots. A fourth return spring that can push the second locking gear to reset is provided between the second locking gear and the bottom of the connecting seat. A fifth return spring that can push the handle to rotate and reset is provided between the handle and the backrest.

[0013] The fourth locking mechanism includes multiple fourth locking grooves arranged circumferentially on the pivot housing, and multiple fourth locking grooves arranged circumferentially on the front connecting housing. A spline that can simultaneously engage with the fourth locking grooves and the fourth locking grooves is slidably provided between the front connecting housing and the pivot housing. The second linkage is connected to the spline so that when the backrest is rotated and folded relative to the seat, the second linkage drives the spline to disengage from the fourth locking grooves. A sixth return spring that can push the spline to reset is provided between the spline and the bottom of the pivot housing.

[0014] The second linkage component includes a second linkage rod that can slide back and forth within the extension plate. The second linkage rod has multiple second protrusions on one side, and each second protrusion has a second pushing slope. The spline has a second mating slope that abuts against the second pushing slope. The connecting seat has a second pushing surface that can push the second linkage rod forward when it rotates and folds relative to the seat part along with the backrest. When the second linkage rod slides forward, the second pushing slope pushes the second mating slope, causing the spline to disengage from the fourth locking groove. The extension plate also has a seventh return spring that pushes the second linkage rod back to its original position.

[0015] The card holder is provided with an outwardly protruding positioning block, and the seat part is provided with a positioning groove that can cooperate with the positioning block to position the seat part in its unfolded position.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. This utility model relates to a stroller seat assembly that connects to the stroller frame via a snap-fit ​​connector. After connection, the snap-fit ​​connector and the stroller frame are relatively fixed. When folding the seat assembly, simply operate the unlocking mechanism to first unlock the second locking mechanism, causing the backrest to rotate towards the seat. During this rotation, the backrest, through the first linkage, unlocks the first locking mechanism between the seat and the snap-fit ​​connector. This allows the seat to rotate relative to the snap-fit ​​connector and move towards the stroller frame, achieving a linked unlocking process that is more convenient and faster for the user. When folding the stroller, the user only needs to operate the unlocking mechanism to rotate the backrest to unlock and rotate the seat, and finally operate the stroller frame to unlock and fold. The entire folding operation of the stroller is very convenient and quick.

[0018] 2. The seat of this utility model is also connected to an armrest. When the backrest is rotated and folded, the fourth locking mechanism between the armrest and the seat is unlocked through the second linkage component, so that the armrest is unlocked in conjunction with the backrest. Therefore, when the backrest is rotated and folded forward, the armrest can rotate and move towards the seat under the action of gravity after being unlocked, and the seat can rotate and move towards the frame under the action of gravity after being unlocked. This allows the user to unlock multiple parts by operating the unlocking component, making it convenient for the user to fold the seat assembly and the stroller.

[0019] 3. This utility model has a simple structure and is easy to fold, making it suitable for widespread application. [Attached Image Description]

[0020] Figure 1 This is one of the perspective views of this utility model;

[0021] Figure 2 This is the second perspective view of this utility model;

[0022] Figure 3 This is one of the exploded views of the components of this utility model;

[0023] Figure 4 This is the second exploded view of a component of this utility model;

[0024] Figure 5 This is the third exploded view of the components of this utility model;

[0025] Figure 6 This is a partial sectional view of the present invention;

[0026] Figure 7 This is a diagram of a children's stroller frame;

[0027] Figure 8 yes Figure 7 Enlarged view at point A in the middle;

[0028] Figure 9This is a schematic diagram of the present invention connected to the frame of a children's stroller.

Detailed Implementation Methods

[0029] The present invention will be further described below with reference to the accompanying drawings:

[0030] like Figures 1 to 9 As shown, a stroller seat assembly includes a locking seat 1 that can be snapped onto a stroller frame 100. When the locking seat 1 is snapped onto the stroller frame 100, the locking seat 1 and the stroller frame 100 are relatively fixed. A seat portion 2 is connected to the locking seat 1. The seat portion 2 includes a support plate 21 and extension plates 22 located on both sides of the support plate 21 and extending upward. A lower connecting shell 23 is fixedly provided on the lower outer side of the extension plate 22. The lower connecting shell 23 is rotatably connected to the locking seat 1, and a first locking mechanism 41 for locking is provided between the two. When the first locking mechanism 41 is in the locked state, the seat portion 2 and the locking seat 1 are relatively fixed, and the seat portion 2 is locked in the unfolded state relative to the stroller frame 100. An upper connecting shell 24 is fixedly provided on the inner side of the upper part of the extension plate 22. A backrest 3, which can be rotated and unfolded or folded relative to the seat part 2, is connected to the upper connecting shell 24. The backrest 3 includes a backrest plate 31 and connecting seats 32 located on the lower parts of both sides of the backrest plate 31. The connecting seats 32 are rotatably connected to the upper connecting shell 24. A second locking mechanism 42 for locking the backrest 3 and the seat part 2 is provided between the upper connecting shell 24 and the connecting seats 32. When the second locking mechanism 42 is locked, the backrest 3 is in the unfolded state relative to the seat part 2. The backrest 3 is provided with an unlocking member 5 for unlocking the second locking mechanism 42, so that the backrest 3 can rotate and fold relative to the seat part 2. A first linkage 61 is provided between the connecting seat 32 and the first locking mechanism 41, which can drive the first locking mechanism 41 to unlock when the backrest 3 rotates and folds relative to the seat part 2. The setting of the first linkage 61 enables the backrest 3 to unlock the first locking mechanism 41 when it rotates and folds, so that there is no need to perform a separate unlocking operation on the first locking mechanism 41. This makes it more convenient and faster for users to fold the stroller. When the user unlocks the second locking mechanism 42 by unlocking the unlocking piece 5 and rotates the backrest 3 forward to fold it, the first locking mechanism 41 is also unlocked. After the seat part 2 is unlocked, it can rotate relative to the locking seat 1 under its own gravity and fold towards the stroller frame 100. Therefore, the user only needs to operate the unlocking piece 5 and rotate the backrest 3 forward to realize the entire seat assembly folding towards the stroller frame 100, which brings convenience to the user.

[0031] like Figures 1 to 5As shown, an armrest 8 is also connected to the front side of the extension plate 22. The armrest 8 can be gripped by children, making it safer for children to ride in the stroller. A front connecting shell 25 is fixedly provided on the front side of the extension plate 22. A pivot shell 81 rotatably connected to the front connecting shell 25 is fixedly provided on the armrest 8. A fourth locking mechanism 44 for locking the two is provided between the pivot shell 81 and the front connecting shell 25. A second linkage 62 is provided between the connecting seat 32 and the fourth locking mechanism 44, which can drive the fourth locking mechanism 44 to unlock when the backrest 3 is rotated and folded relative to the seat part 2. When the backrest 3 is rotated and folded, the second linkage 62 drives the fourth locking mechanism 44 between the armrest 8 and the seat 2 to unlock, realizing the linkage unlocking of the armrest 8. Therefore, when the backrest 3 is rotated and folded forward, the armrest 8 can rotate and move towards the seat 2 under the action of gravity after unlocking, and the seat 2 can rotate and move towards the stroller frame 100 under the action of gravity after unlocking. This allows the user to unlock multiple parts by operating the unlocking part 5, making it convenient for the user to fold the seat assembly and the stroller.

[0032] like Figures 3 to 5 As shown, in this embodiment, the first locking mechanism 41 includes a plurality of first locking grooves 411 arranged circumferentially on the lower connecting shell 23, and a plurality of first locking grooves 412 arranged circumferentially on the locking seat 1. A first locking gear 413 is slidably arranged between the lower connecting shell 23 and the locking seat 1, capable of engaging with the first locking grooves 411 and the first locking grooves 412 simultaneously. When the first locking gear 413 engages with the first locking grooves 411 and the first locking grooves 412 simultaneously, the seat part 2 is locked and cannot rotate relative to the locking seat 1, at which time the seat part 2 can be used by a child. The first linkage 61 is connected to the first locking gear 413 so that when the backrest 3 is rotated and folded, the first linkage 61 pushes the first locking gear 413 to disengage from the first locking grooves 412. A first return spring 414 is provided between the lower connecting shell 23 and the first locking gear 413, capable of pushing the first locking gear 413 to reset. When the backrest 3 is rotated and folded, the first linkage 61 drives the first locking gear 413 to disengage from the first locking groove 412. Once the first locking gear 413 disengages from the first locking groove 412, the seat part 2 can rotate downward relative to the locking seat 1 under its own gravity, so that the seat part 2 moves closer to the stroller frame 100. At this time, the backrest 3 also moves closer to the seat part 2, realizing the folding of the seat assembly.

[0033] like Figures 3 to 6As shown, the first linkage 61 includes a first linkage rod 611 that slides through the locking seat 1. The first linkage rod 611 has a plurality of first protrusions 612 on one side. The first protrusions 612 have a first pushing slope 613. The first locking gear 413 has a first mating slope 614 that abuts against the first pushing slope 613. The connecting seat 32 has an insertion groove 615 for the upper end of the first linkage rod 611 to move relative to it. The front end of the insertion groove 615 has a first pushing surface 616 that can push the first linkage rod 611 downward when the connecting seat 32 rotates and folds relative to the seat part 2. When the first linkage rod 611 slides downward, the first pushing slope 613 pushes the first mating slope 614, causing the first locking gear 413 to disengage from the first locking groove 412. The locking seat 1 has an eighth return spring 617 that can push the first linkage rod 611 back to its original position. Specifically, when the backrest 3 is folded forward, the first pushing surface 616 on the connecting seat 32 pushes the first linkage rod 611 to slide. The first pushing inclined surface 613 on the first linkage rod 611 then pushes the first mating inclined surface 614 on the first locking gear 413, thereby disengaging the first locking gear 413 from the first locking groove 412. At this time, the first locking mechanism 41 is unlocked, and the seat 2 can rotate to approach the stroller frame 100. Furthermore, the upper end of the first linkage rod 611 is placed in the insertion groove 615. When the backrest 3 is folded forward, the first pushing surface 616 pushes the first linkage rod 611 to slide. When the backrest 3 is rotated backward to adjust the angle, the upper end of the first linkage rod 611 moves freely within the insertion groove 615 without interfering with the connecting seat 32, thus ensuring the normal operation of the backrest angle adjustment function.

[0034] like Figures 3 to 5As shown, in this embodiment, the second locking mechanism 42 includes a plurality of second locking grooves 421 arranged circumferentially on the connecting seat 32, and a plurality of second locking grooves 422 arranged circumferentially on the upper connecting shell 24. A second locking gear 423 is slidably arranged between the upper connecting shell 24 and the connecting seat 32, capable of engaging simultaneously with the second locking grooves 421 and the second locking grooves 422. A rotatable movable block 424 is provided between the second locking gear 423 and the bottom of the upper connecting shell 24. A plurality of inclined grooves 425 are arranged circumferentially on the movable block 424, and the second locking gear 423 is provided with a groove that engages with the inclined grooves 425. The inclined protrusion 426, the unlocking component 5 includes a handle 51 rotatably connected to the backrest 3, a pull rope 52 between the handle 51 and the movable block 424 that can pull the movable block 424 to rotate, when the movable block 424 rotates, the inclined groove 425 on it cooperates with the inclined protrusion 426 so that the movable block 424 can laterally push the second locking gear 423 to disengage from the second locking groove 422, a fourth return spring 427 that can push the second locking gear 423 to reset is provided between the second locking gear 423 and the bottom of the connecting seat 32, and a fifth return spring that can push the handle 51 to rotate and reset is provided between the handle 51 and the backrest 3. Specifically, when the handle 51 is turned, the pull rope 52 pulls the movable block 424 to rotate. When the movable block 424 rotates, the inclined groove 425 on it pushes against the inclined protrusion 426 on the second locking gear 423, causing the second locking gear 423 to disengage from the second locking groove 422. At this time, the second locking mechanism 42 is unlocked, and the backrest 3 can be rotated forward and folded or adjusted backward.

[0035] like Figures 3 to 5As shown, the fourth locking mechanism 44 includes a plurality of fourth locking grooves 441 arranged along the circumferential direction on the pivot housing 81, a plurality of fourth locking grooves 442 arranged along the circumferential direction on the front connecting housing 25, a spline 443 that can simultaneously engage with the fourth locking grooves 441 and the fourth locking grooves 442 is slidably arranged between the front connecting housing 25 and the pivot housing 81, the second linkage 62 is connected to the spline 443 so that when the backrest 3 is rotated and folded relative to the seat part 2, the second linkage 62 drives the spline 443 to disengage from the fourth locking grooves 442, and a sixth return spring 444 that can push the spline 443 to return to its original position is provided between the spline 443 and the bottom of the pivot housing 81. The second linkage 62 includes a second linkage rod 621 that can slide back and forth within the extension plate 22. The second linkage rod 621 has a plurality of second protrusions 622 on one side. The second protrusions 622 have a second pushing slope 623. The spline 443 has a second mating slope 624 that abuts against the second pushing slope 623. The connecting seat 32 has a second pushing surface 625 that can push the second linkage rod 621 forward when it rotates and folds with the backrest 3 relative to the seat part 2. When the second linkage rod 621 slides forward, the second pushing slope 623 pushes the second mating slope 624, causing the spline 443 to disengage from the fourth locking groove 442. The extension plate 22 also has a seventh return spring 626 that pushes the second linkage rod 621 back to its original position. When the backrest 3 is rotated and folded forward, the second pushing surface 625 on the connecting seat 32 pushes the second linkage rod 621 to slide forward, and the second pushing slope 623 on the second linkage rod 621 pushes the second mating slope 624, causing the spline 443 to disengage from the fourth locking groove 442. At this time, the fourth locking mechanism 44 is unlocked, and the armrest 8 can rotate and fold relative to the seat 2.

[0036] like Figure 1 and Figure 3 As shown, the latching seat 1 has an outwardly protruding positioning block 12, and the seat part 2 has a positioning groove 26 that cooperates with the positioning block 12 to position the seat part 2 in its unfolded position. When the seat assembly 3 is unfolded, the seat part 2 can be rotated relative to the latching seat 1 to the unfolded position by pulling the backrest 3 backward. When the set position is reached, the first locking mechanism 41 and the second locking mechanism 42 lock again. Furthermore, the positioning groove 26, in cooperation with the positioning block 12, can position the unfolded position of the seat part 2 and limit its rotation range. After the seat part 2 and backrest 3 are unfolded, the armrest 8 can be unfolded and locked by pulling it upward.

[0037] like Figures 1 to 5 and Figure 9As shown, the latching seat 1 is detachably connected to the joint seat 101 on the stroller frame 100, allowing the seat assembly to be removed from the stroller frame 100 when needed. The latching seat 1 is equipped with a third locking mechanism 43 that locks it onto the joint seat 101. The extension plate 22 is equipped with an operating member 7 that unlocks the third locking mechanism 43 when pressed. The operating end 71 of the operating member 7 is higher than the upper end of the joint seat 101. Because the operating end 71 is higher than the upper end of the joint seat 101, the user can easily touch and operate the operating end 71 when the seat assembly needs to be removed, facilitating the unlocking of the third locking mechanism 43.

[0038] like Figures 3 to 5 ,as well as Figure 8 As shown, the joint seat 101 is provided with a protruding locking platform 102, and the locking seat 1 is provided with a slot 11 that can be inserted and engaged with the locking platform 102. The third locking mechanism 43 includes a locking block 431 that is slidably disposed on the locking seat 1 and can engage or disengage from the locking hole 103 on the joint seat 101. The operating member 7 includes an operating rod 72 that can slide longitudinally within the extension plate 22. The operating end 71 is disposed at the upper end of the operating rod 72 and exposed at the upper end of the extension plate 22. The lower end of the operating rod 72 is provided with an inclined surface 73 that can push the locking block 431 to disengage from the locking hole 103 when it moves downward. A second return spring 74 that can push the operating rod 72 to return upward is provided between the extension plate 22 and the operating end 71. A third return spring 432 that can push the locking block 431 to return is provided between the locking block 431 and the locking seat 1. When the user presses the operating end 71, the operating lever 72 moves downward and pushes the locking block 431 to disengage from the locking hole 103. Once the locking block 431 disengages from the locking hole 103, the user can lift the seat assembly upward, thereby detaching the seat assembly from the stroller frame 100 as a whole.

[0039] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the invention.

Claims

1. A stroller seat assembly, characterized in that: The stroller includes a locking seat (1) that can be attached to a stroller frame (100). A seat (2) is connected to the locking seat (1). The seat (2) includes a support plate (21) and extension plates (22) that are located on both sides of the support plate (21) and extend upward. A lower connecting shell (23) that can be rotatably connected to the locking seat (1) is fixedly provided on the lower outer side of the extension plate (22). An upper connecting shell (24) is fixedly provided on the upper inner side of the extension plate (22). A backrest (3) that can be rotated and unfolded or folded relative to the seat (2) is connected to the upper connecting shell (24). The backrest (3) includes a backrest panel (31) and connecting seats (32) located on the lower sides of the backrest panel (31). 2) The connecting seat (32) is rotatably connected to the upper connecting shell (24). A first locking mechanism (41) for locking the seat part (2) and the locking seat (1) is provided between the lower connecting shell (23) and the locking seat (1). A second locking mechanism (42) for locking the backrest (3) and the seat part (2) is provided between the upper connecting shell (24) and the connecting seat (32). An unlocking member (5) for unlocking the second locking mechanism (42) is provided on the backrest (3). A first linkage member (61) that can drive the first locking mechanism (41) to unlock when the backrest (3) rotates and folds relative to the seat part (2) is provided between the connecting seat (32) and the first locking mechanism (41).

2. The stroller seat assembly according to claim 1, characterized in that: The locking seat (1) is detachably connected to the joint seat (101) on the stroller frame (100). The locking seat (1) is provided with a third locking mechanism (43) that can lock it onto the joint seat (101). The extension plate (22) is provided with an operating member (7) for unlocking the third locking mechanism (43) after pressing. The operating end (71) of the operating member (7) is higher than the upper end of the joint seat (101).

3. The stroller seat assembly according to claim 1, characterized in that: The extension plate (22) is also connected to the front side of the armrest (8). The front connecting shell (25) is fixedly provided on the front side of the extension plate (22). The armrest (8) is fixedly provided with a pivot shell (81) that is rotatably connected to the front connecting shell (25). A fourth locking mechanism (44) for locking the two is provided between the pivot shell (81) and the front connecting shell (25). A second linkage (62) that can drive the fourth locking mechanism (44) to unlock is provided between the connecting seat (32) and the fourth locking mechanism (44).

4. The stroller seat assembly according to claim 1, characterized in that: The first locking mechanism (41) includes a plurality of first locking grooves (411) arranged in the circumferential direction on the lower connecting shell (23), a plurality of first locking grooves (412) arranged in the circumferential direction on the locking seat (1), a first locking gear (413) that can simultaneously engage with the first locking grooves (411) and the first locking grooves (412) is slidably arranged between the lower connecting shell (23) and the locking seat (1), the first locking gear (413) is connected to the first locking gear (413) so that when the backrest (3) is rotated and folded, the first locking gear (413) is pushed by the first locking gear (412) to disengage from the first locking grooves (412), and a first return spring (414) that can push the first locking gear (413) to reset is provided between the lower connecting shell (23) and the first locking gear (413).

5. The stroller seat assembly according to claim 4, characterized in that: The first linkage (61) includes a first linkage rod (611) that slides through the snap-fit ​​seat (1). The first linkage rod (611) has a plurality of first protrusions (612) on one side. The first protrusions (612) have a first pushing inclined surface (613). The first locking gear (413) has a first mating inclined surface (614) that abuts against the first pushing inclined surface (613). The connecting seat (32) has an insertion groove (615) for the upper end of the first linkage rod (611) to move relative to it. The insertion slot (615) has a first pushing surface (616) at the front end that can push the first linkage rod (611) to slide downward when the connecting seat (32) rotates and folds relative to the seat part (2) along with the backrest (3). When the first linkage rod (611) slides downward, the first pushing inclined surface (613) pushes the first mating inclined surface (614) to disengage the first locking gear (413) from the first locking groove (412). The locking seat (1) is provided with an eighth return spring (617) that can push the first linkage rod (611) to reset.

6. The stroller seat assembly according to claim 2, characterized in that: The joint seat (101) is provided with a protruding locking platform (102), and the locking seat (1) is provided with a slot (11) that can be inserted and engaged with the locking platform (102). The third locking mechanism (43) includes a locking block (431) that is slidably disposed on the locking seat (1) and can engage or disengage with the locking hole (103) on the joint seat (101). The operating member (7) includes an operating rod (72) that can slide longitudinally within the extension plate (22). The operating end (71) is provided on the operating... The upper end of the operating rod (72) is exposed on the upper end of the extension plate (22). The lower end of the operating rod (72) is provided with an inclined surface (73) that can push the locking block (431) and the locking hole (103) to disengage when it moves downward. A second return spring (74) that can push the operating rod (72) to return to its original position is provided between the extension plate (22) and the operating end (71). A third return spring (432) that can push the locking block (431) to return to its original position is provided between the locking block (431) and the locking seat (1).

7. The stroller seat assembly according to claim 1, characterized in that: The second locking mechanism (42) includes a plurality of second locking grooves (421) arranged circumferentially on the connecting seat (32), a plurality of second locking grooves (422) arranged circumferentially on the upper connecting shell (24), a second locking gear (423) slidably arranged between the upper connecting shell (24) and the connecting seat (32) and capable of engaging simultaneously with the second locking grooves (421) and the second locking grooves (422), a rotatable movable block (424) arranged between the second locking gear (423) and the bottom of the upper connecting shell (24), a plurality of inclined grooves (425) arranged circumferentially on the movable block (424), and an inclined protrusion (426) arranged on the second locking gear (423) that engages with the inclined grooves (425). The unlocking component (5) includes a handle (51) rotatably connected to the backrest (3). A pull rope (52) is provided between the handle (51) and the movable block (424) to pull the movable block (424) to rotate. When the movable block (424) rotates, the inclined groove (425) and the inclined protrusion (426) on it cooperate to allow the movable block (424) to push the second locking gear (423) and the second locking groove (422) to disengage laterally. A fourth return spring (427) is provided between the second locking gear (423) and the bottom of the connecting seat (32) to push the second locking gear (423) to reset. A fifth return spring is provided between the handle (51) and the backrest (3) to push the handle (51) to rotate and reset.

8. The stroller seat assembly according to claim 3, characterized in that: The fourth locking mechanism (44) includes a plurality of fourth locking grooves (441) arranged in the circumferential direction on the pivot shell (81), a plurality of fourth locking grooves (442) arranged in the circumferential direction on the front connecting shell (25), a spline (443) that can engage with the fourth locking grooves (441) and the fourth locking grooves (442) is slidably arranged between the front connecting shell (25) and the pivot shell (81), the spline (443) is connected to the spline (443) so that when the backrest (3) is rotated and folded relative to the seat part (2), the second linkage (62) drives the spline (443) to disengage from the fourth locking grooves (442), and a sixth return spring (444) that can push the spline (443) to return to its original position is provided between the spline (443) and the bottom of the pivot shell (81).

9. The stroller seat assembly according to claim 8, characterized in that: The second linkage (62) includes a second linkage rod (621) that can slide back and forth within the extension plate (22). The second linkage rod (621) has a plurality of second protrusions (622) on one side. The second protrusions (622) have a second pushing slope (623). The spline (443) has a second mating slope (624) that abuts against the second pushing slope (623). The connecting seat (32) has a second pushing surface (625) that can push the second linkage rod (621) forward when it rotates and folds relative to the seat part (2) with the backrest (3). When the second linkage rod (621) slides forward, the second pushing slope (623) pushes the second mating slope (624) to disengage the spline (443) from the fourth locking groove (442). The extension plate (22) also has a seventh return spring (626) that pushes the second linkage rod (621) back to its original position.

10. The stroller seat assembly according to claim 1, characterized in that: The card holder (1) is provided with an outwardly protruding positioning block (12), and the seat part (2) is provided with a positioning groove (26) that can cooperate with the positioning block (12) to position the seat part (2) in the unfolded position.

Images