CN113247076B

CN113247076B - Baby stroller seat assembly and baby stroller

Info

Publication number: CN113247076B
Application number: CN202010087653.3A
Authority: CN
Inventors: 刘修平
Original assignee: SUNNYLOVE BABY PRODUCTS ZHUHAI CO LTD
Current assignee: SUNNYLOVE BABY PRODUCTS ZHUHAI CO LTD
Priority date: 2020-02-12
Filing date: 2020-02-12
Publication date: 2025-01-24
Anticipated expiration: 2040-02-12
Also published as: CN113247076A

Abstract

The invention relates to a baby carriage seat assembly and a baby carriage, wherein the seat assembly comprises a seat part and a backrest part, the inclination angle of the backrest part relative to the seat part is adjustable, a handrail part is rotatably arranged relative to the seat part, a joint assembly is used for connecting the backrest part, the handrail part and the seat part together, the joint assembly comprises a first locking and unlocking part, a second locking and unlocking part and an actuating piece, the first locking and unlocking part and the second locking and unlocking part are connected with the actuating piece, the actuating piece rotates synchronously with the backrest part, the first operating piece is connected with the actuating piece through a force transmission piece and is configured to drive the actuating piece to move through the force transmission piece when the first operating piece moves to a first unlocking position, so that the first locking and unlocking part is unlocked through the movement of the actuating piece, the inclination angle of the backrest part relative to the seat part is allowed to be adjusted, and drive the actuating piece to rotate in the process that the backrest part rotates and folds back towards the seat part through the rotation of the actuating piece.

Description

Baby carriage seat assembly and baby carriage

Technical Field

The present disclosure relates to the technical field of child products, and more particularly, to a stroller seat assembly and a stroller.

Background

In order to improve riding comfort, the existing baby carriage designs a structure with an adjustable backrest inclination angle, the backrest is erected when a baby sits on the baby carriage in daily life, and the backrest is adjusted backwards after the baby falls asleep. Moreover, folding is also required when the stroller is to be carried or stored. In order to achieve these two functions, the existing strollers require a complex mechanism to design and are difficult to operate.

Disclosure of Invention

Embodiments of the present disclosure provide a stroller seat assembly and a stroller that can more conveniently adjust and fold the seat assembly.

An aspect of an embodiment of the present disclosure provides a stroller seat assembly comprising:

A seat part;

a backrest portion having an adjustable inclination angle with respect to the seat portion;

a armrest part which is arranged between the seat part and the backrest part and is rotatably arranged relative to the seat part;

The joint assembly is used for connecting the backrest part, the armrest part and the seat part together and comprises a first locking and unlocking part, a second locking and unlocking part and an actuating part which synchronously rotates along with the backrest part, and the first locking and unlocking part and the second locking and unlocking part are connected with the actuating part;

A force transmitting member;

The first operating member is connected with the actuating member through the force transmission member and is configured to drive the actuating member to move through the force transmission member when moving to the first unlocking position, so that the first locking and unlocking component is unlocked through the movement of the actuating member, the inclination angle of the backrest part relative to the seat part is allowed to be adjusted, and the actuating member is driven to rotate in the process that the backrest part rotates and folds back towards the seat part, so that the second locking and unlocking component is unlocked through the rotation of the actuating member, and the armrest part is allowed to rotate and fold back towards the seat part.

In some embodiments, the backrest portion comprises a U-shaped tube, and two ends of the U-shaped tube are respectively connected with two side ends of the seat portion along the width direction of the seat assembly through one joint assembly;

The first operating piece is arranged in the middle of the transverse tube of the U-shaped tube, the force transmission piece is arranged in the U-shaped tube in a penetrating mode, and the force transmission piece is connected with the first operating piece and respectively connected with the actuating pieces on two sides.

In some embodiments, the first operating member is disposed on top of the cross tube, a first end of the first operating member is rotatably connected to the cross tube, and the axis of rotation is aligned with the direction of extension of the cross tube, and a second end of the first operating member is a free end configured to reach the first unlocked position upon movement in a direction away from the cross tube.

In some embodiments, the joint assembly further comprises:

a first joint member connected to the side end of the seat portion, and

The second joint piece comprises a first cover body part and a first connecting part which are connected with each other, the first cover body part is buckled on the inner side of the first joint piece along the width direction of the seat assembly, and the first connecting part is connected with the backrest part;

the inner side of the first cover body is provided with a first chute, and the actuating piece is movably arranged in the first chute.

In some embodiments, the joint assembly further comprises a first joint member coupled to a lateral end of the seat portion;

The first lock unlocking member includes:

a plurality of first clamping grooves which are arranged on the inner side surface of the first joint piece along the width direction of the seat assembly and are arranged at intervals along the rotation direction of the backrest part, and

The boss is fixed on the actuating piece and is configured to be embedded into one of the first clamping grooves when the first operating piece is in the first locking position so as to fix the backrest part relative to the seat part, and is separated from the first clamping groove when the first operating piece is in the first unlocking position so as to adjust the inclination angle of the backrest part.

In some embodiments, the actuator rotates with the backrest portion, and the second lock unlocking member comprises:

the first lug is fixed on the outer side of the actuating piece in the width direction and is provided with a first inclined plane;

a thrust component arranged outside the actuator along the width direction, provided with a second bump on the side facing the first bump, provided with a second inclined surface, provided with a second clamping groove along the circumferential direction, and

A locking block connected with the armrest part and configured to be embedded into the second locking groove when the first operation piece is at the first locking position so as to fix the armrest part relative to the seat part;

The first inclined surface is contacted with the second inclined surface in the process that the backrest part continuously rotates beyond the steepest inclination angle gear, and the clamping block is separated from the second clamping groove through the motion coordination of the first inclined surface and the second inclined surface so as to enable the second locking, unlocking and unlocking.

In some embodiments, the thrust assembly includes:

A first thrust disk including a disk body and a second bump provided on a side of the disk body facing the first bump, and

The second thrust disc is coaxially arranged with the first thrust disc, a second clamping groove is arranged on the side wall of the second thrust disc, the groove bottom of the second clamping groove is an inclined plane, and the radial dimension of the groove bottom is gradually increased from outside to inside along the width direction;

In the process that the first operating piece is in the first unlocking position and the backrest rotates and folds back towards the seat part, the first inclined plane and the second inclined plane are matched with each other in movement, so that the first thrust disc and the second thrust disc jointly move outwards along the width direction, and the clamping block is pushed to be separated from the second clamping groove through the groove bottom of the second clamping groove.

In some embodiments, the end of the clamping block is provided with an inclined plane and is matched with the bottom of the second clamping groove.

In some embodiments, the second protrusions are provided in two and are disposed in central symmetry with respect to a centerline of the thrust assembly, the centerline of the thrust assembly being coincident with the axis of rotation of the backrest portion and the armrest portion.

In some embodiments, the joint assembly further comprises:

The first joint piece comprises a first connecting part, a second connecting part, a first connecting part and a second connecting part, wherein the first connecting part is connected with the first connecting part;

the clamping block is slidably arranged in the guide groove.

In some embodiments, the joint assembly further comprises:

A first joint member connected to the side end of the seat portion, the first joint member including a first disk portion coaxially provided, a shaft portion extending at least in the width direction toward the outside of the first disk portion, and an annular first flange portion provided on the side surface of the first disk portion facing outward in the width direction and located radially outward of the shaft portion, and

A cover coaxially provided with the first joint member, the cover including a second disk portion and an annular second flange portion, the second flange portion being in contact with the first flange portion;

The third joint piece is arranged between the first disc part and the second disc part along the width direction and sleeved on the circumferential outer sides of the first flange part and the second flange part, the inner walls of the first flange part and the second flange part are provided with inner splines, the thrust component is sleeved on the shaft part, the outer wall of the thrust component is provided with outer splines matched with the inner splines, and the thrust component is enabled to move along the width direction through the motion matching of the first inclined plane and the second inclined plane, so that the clamping block is separated from the second clamping groove.

In some embodiments, the joint assembly further includes a first reset element disposed between the thrust assembly and the cover configured to reset the thrust assembly after the back portion and the armrest portion are deployed relative to the seat portion.

Another aspect of the embodiments of the present disclosure provides a stroller including the above-described embodiment.

In some embodiments, further comprising a frame configured to support the stroller seat assembly, the joint assembly further comprising:

The first joint piece is connected with the side end of the seat part and is provided with a mounting hole along the rotation axis of the backrest part and the armrest part;

A third lock unlocking member including a shaft and a hole provided on the frame, the shaft passing coaxially through the first joint member and the shaft being movably provided along the rotation axis with respect to the first joint member, and

The stroller seat assembly includes a frame, a first locking position configured to lock the stroller seat assembly to the frame, a second locking position configured to lock the stroller seat assembly to the frame, and a second unlocking position configured to unlock the stroller seat assembly from the frame.

In some embodiments, the second operating member is provided with a third inclined surface, and the third locking and unlocking part further includes:

the sleeve piece is coaxially and fixedly arranged in the mounting hole and penetrates through the second operation piece, and a guide groove is formed in the side wall of the sleeve piece along the rotation axis;

the pin shaft penetrates through the shaft and the guide groove along the radial direction, and the outer side wall of the pin shaft is contacted with the third inclined surface;

the second operating piece is configured to enable the pin shaft to be in contact with the lowest position of the third inclined surface when in the second locking position, and the pin shaft is driven to move along the guide groove through the third inclined surface in the process of moving from the second locking position to the second unlocking position so as to drive the shaft to retract and separate from the hole.

In some embodiments, the third ramp increases in thickness from bottom to top along the axis of rotation to cause the pin to retract inwardly by sliding upwardly when the second operating member is depressed.

In some embodiments, the second operating member is provided with a first through hole along the rotation axis, both sides of the first through hole are provided with third inclined planes with consistent inclination angles, and both ends of the pin shaft are respectively overlapped on the third inclined planes on both sides.

In some embodiments, the actuating member is provided with a second chute on the inner side in the width direction;

the second operating piece is movably arranged in the second sliding groove, and the moving direction of the second operating piece is consistent with that of the actuating piece.

In some embodiments, the joint assembly further comprises:

a second joint member provided on the inner side of the first joint member in the width direction and connected to the backrest portion, a stopper portion provided between the second joint member and the second operation member and configured to restrict the second operation member in the second locking position, and

The second reset element is arranged between the second operating piece and the actuating piece and is configured to reset the second operating piece when the first operating piece is in the first locking position and reset the first operating piece when the second operating piece is in the second locking position.

In some embodiments, the joint assembly further comprises:

The second joint piece is arranged on the inner side of the first joint piece in the width direction and is connected with the backrest part;

a fixing member provided at an inner end portion of the sleeve member and configured to fix the sleeve member to the second joint member, and

And a third reset element disposed within the sleeve member and between the fixing member and an end of the shaft, configured to reset the shaft.

The baby carriage seat assembly comprises a first operating piece, a second locking and unlocking piece and a second handrail, wherein the first operating piece is configured to drive the actuating piece to move through a force transmission piece when moving to a first unlocking position, the first locking and unlocking piece is unlocked through the movement of the actuating piece, the inclination angle of the backrest relative to the seat is allowed to be adjusted, and in the process that the backrest rotates and folds back towards the seat, the actuating piece is driven to rotate through the backrest, the second locking and unlocking piece is unlocked through the rotation of the actuating piece, and the handrail rotates and folds back towards the seat. The seat assembly can conveniently adjust the inclination angle of the backrest part, and when the first operation piece is positioned at the first unlocking position, the whole seat assembly is folded back to be folded, so that the mechanism can be simplified, the operation is easy, and the adjustment and folding of the seat assembly are more convenient.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate and explain the present disclosure, and together with the description serve to explain the present disclosure. In the drawings:

FIG. 1 is a perspective view of some embodiments of a stroller seat assembly of the present disclosure;

FIG. 2 is an exploded view of some embodiments of a stroller seat assembly of the present disclosure;

FIG. 3 is a schematic elevational view of the back portion of some embodiments of the disclosed stroller seat assembly;

FIG. 4 is a schematic rear view of the back portion of some embodiments of the stroller seat assembly of the present disclosure;

FIG. 5 is a cross-sectional view of a first operator mounted to a back portion in some embodiments of the stroller seat assembly of the present disclosure;

FIG. 6 is a cross-sectional view of the first operating member of FIG. 5 raised relative to the backrest portion;

FIG. 7 is a schematic side elevational view of some embodiments of a stroller seat assembly of the present disclosure;

FIG. 8 is an inside view of the first lock release member with the first operator in the first locked position;

FIG. 9 is an outside view of the first lock release member with the first operating member in the first locked position;

FIG. 10 is an enlarged view of K of FIG. 4, corresponding to the first operating member being in the first locked position;

FIG. 11 is an inside view of the first locking and unlocking member when the first operating member is moved to the first unlocked position;

FIG. 12 is an outside view of the first locking and unlocking member when the first operating member is moved to the first unlocked position;

FIG. 13 is a schematic view showing a state in which the first operating member is moved to the first unlocking position;

FIG. 14 is a schematic view of the backrest in three recline gears;

FIG. 15 is an inside view of the second lock release member with the first operating member in the first locked position;

FIG. 16 is an outside view of the second lock release member with the first operating member in the first locked position;

Fig. 17 is a perspective view of the second lock unlocking member in a locked state with the first operating member in the first locked position;

FIG. 18 is an inside view of the second lock release member in an unlocked state with the first operator in the first unlocked position;

FIG. 19 is an outside view of the second lock release member in an unlocked state with the first operator in the first unlocked position;

FIG. 20 is a perspective view of the second lock release member in an unlocked state with the first operating member in the first unlocked position;

FIG. 21 is a schematic view of the backrest portion folded back toward the armrest portion;

FIG. 22 is a schematic view of both the back and armrest portions folded back toward the seat portion;

FIG. 23 is a schematic view of the second operating member in a second locked position;

Fig. 24 is a schematic structural view of the third lock unlocking member when the second operating member is in the second locked position;

FIG. 25 is a perspective view of the mating structure of the sleeve member, shaft and pin with the second operating member in the second locked position;

FIG. 26 is a cross-sectional view of the joint assembly with the second operating member in the second locked position;

FIG. 27 is a view of the medial side of the joint assembly in section with the second operating member in the second locked position;

FIG. 28 is a schematic view of the second operating member in a second locked position with the second operating member engaged with the actuating member;

FIG. 29 is a schematic view of the second operating member in a second unlocked position;

FIG. 30 is a schematic view of the third locking and unlocking member when the second operating member is in the second unlocked position;

FIG. 31 is a perspective view of the mating structure of the sleeve member, shaft and pin when the second operating member is in the second unlocked position;

FIG. 32 is a cross-sectional view of the joint assembly with the second operating member in the second unlocked position;

FIG. 33 is a view of the inside of the joint assembly in section with the second operating member in the second unlocked position;

FIG. 34 is a schematic view of the second operating member engaged with the actuating member when the second operating member is in the second unlocked position;

FIG. 35 is a schematic view of the construction of the second operating member;

FIG. 36 is a schematic view of the structure of the actuator;

FIG. 37 is a schematic view of the structure of a second articular component;

FIG. 38 is a schematic view of the first articular component mounted to the seat portion;

FIG. 39 is a schematic view of a third articular component;

FIG. 40 is a schematic view of a first thrust disc;

FIG. 41 is a schematic view of the structure of the cover;

fig. 42 is an exploded view of one embodiment of the stroller of the present disclosure as an assembly.

Detailed Description

The present disclosure is described in detail below. In the following paragraphs, the different aspects of the embodiments are defined in more detail. Aspects so defined may be combined with any other aspect or aspects unless explicitly stated to be non-combinable. In particular, any feature or features may be combined with one or more other features may be desired and advantageous.

The terms "first," "second," and the like in this disclosure are merely for convenience of description to distinguish between different constituent components having the same name, and do not denote a sequential or primary or secondary relationship.

In the description of the present disclosure, it should be understood that the directions or positional relationships indicated by the terms "inner", "outer", "top", "bottom", "front", "rear", "left" and "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present disclosure, and do not indicate or imply that the apparatus referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present disclosure. Where the orientations of "front", "rear", "left" and "right" are defined in terms of the direction in which the infant sits in the seat assembly. Wherein, the length direction refers to the front-back direction of the baby carriage seat assembly, and the width direction refers to the left-right direction of the baby carriage seat assembly.

The present disclosure provides a stroller including a frame configured to support a seat assembly, the frame enabling travel of the stroller when subjected to an external force, and a stroller seat assembly (hereinafter referred to as a "seat assembly") integrally mountable on the frame for seating a baby or child, e.g., detachably mountable.

Fig. 1 to 42 are schematic structural views of a stroller seat assembly of the present disclosure. In some embodiments, as shown in FIG. 1, the seat assembly includes a seat portion 3, a back portion 12, an armrest portion 2, a footrest portion 4, a joint assembly B, a force transfer member 11, and a first operating member A.

The backrest portion 13 is connected above the rear end of the seat portion 3, and the inclination angle with respect to the seat portion 3 is adjustable. At least one U-shaped framework 1 is rotatably arranged on the backrest part 13, and the framework 1 is fixed on the roof and is used for realizing the folding and unfolding of the roof. The armrest portion 2 is provided between the seat portion 3 and the backrest portion 13, and is rotatably provided with respect to the seat portion 3. The footrest section 4 is connected below the front end of the seat section 3.

The joint assembly B connects the backrest portion 13, the armrest portion 2, and the seat portion 3 together, and the backrest portion 13 and the armrest portion 2 are detachably provided. The joint assembly B includes a first lock unlocking member, a second lock unlocking member, and an actuator 16, both of which are connected to the actuator 16, and the actuator 16 rotates synchronously with the backrest portion 13. Preferably, the center line of the joint assembly B coincides with the rotational axes of the backrest portion 13 and the armrest portion 2 to simplify the structure.

The first operating member a is connected to the actuating member 16 via a force transmitting member 11, for example, the force transmitting member 11 may be an elongated structure capable of transmitting force, such as a wire rope, a chain, a fiber rope, etc. The first operating member a has two positions including a first locked position and a first unlocked position.

The first operating member a is configured to fix the backrest portion 13, the armrest portion 2 and the seat portion 3 when in the first locked position, and to move the actuating member 16 by the force transmitting member 11 when moving to the first unlocked position to unlock the first locking and unlocking member by the movement of the actuating member 16, allowing adjustment of the inclination of the backrest portion 13 relative to the seat portion 3, continuous adjustment or multi-shift adjustment, for example, unlocking the first locking and unlocking member by the movement of the actuating member 16, and to move the actuating member 16 by the movement of the actuating member 13 during the first operating member a in the first locked position with the first locking and unlocking member in an unlocked state and the backrest portion 13 being turned back toward the seat portion 3, to unlock the second locking and unlocking member by the rotation of the actuating member 16, allowing the armrest portion 2 to be turned back toward the seat portion 3, at which time the armrest portion 2 and the backrest portion 13 can both be turned back relative to the seat portion 3 to effect folding of the seat portion due to the first locking and unlocking member being unlocked.

The seat assembly of this embodiment of this disclosure can conveniently adjust the inclination of back to conveniently turn back the whole seat assembly and receive when first operating member is in first unblock position and close, can simplify the mechanism, easily operation makes the regulation of seat assembly and receive and close more convenient.

As shown in fig. 2, the backrest part 13 comprises a U-shaped pipe, both ends of which are respectively connected with both side ends of the seat part 3 in the width direction of the seat assembly through a joint assembly B, and the U-shaped pipe comprises two vertical pipes and a transverse pipe connected with the top ends of the two vertical pipes. The first operating member A is arranged in the middle of the transverse tube of the U-shaped tube, the force transmission member 11 is arranged in the U-shaped tube in a penetrating way, and the force transmission member 11 is connected with the first operating member A and respectively connected with the actuating members 16 at two sides.

By penetrating the force transmission member 11 into the U-shaped tube of the backrest portion 13, the guiding action of the U-shaped tube can be fully utilized when the force transmission member 11 is pulled, the force transmission member 11 is not pulled out, reliability of locking and unlocking can be provided, and the structure of the seat assembly can be simplified.

For supporting the back of the occupant, the backrest portion 13 further includes a support member, both ends of which in the width direction are connected to two vertical pipes of the U-shaped pipe. For example, the support member may be made of a flexible material, such as a support cloth or a support net, which may reduce the weight of the seat assembly for easy portability, or a rigid material, such as a plastic support plate, etc.

The force transmission members 11 may be connected in two ways, that is, two force transmission members 11 are adopted, the two force transmission members 11 are respectively located at two sides in the U-shaped pipe, one end of each force transmission member 11 is connected with the first operation member a, and the other end is connected with the actuation member 16. And secondly, a complete force transmission piece 11 is adopted, two ends of the force transmission piece 11 are respectively connected with two actuating pieces 16, and the middle part of the force transmission piece passes through the first operating piece A.

As shown in fig. 3 and 4, the first operating member a is provided at the top of the cross tube, a first end of the first operating member a is rotatably connected to the cross tube, and a rotation axis coincides with an extending direction of the cross tube, and a second end of the first operating member a is a free end configured to reach the first unlock position when moving in a direction away from the cross tube.

The structure realizes unlocking by pulling the first operating member A upwards, so that a user can more conveniently perform unlocking operation, the inclination angle of the backrest 13 can be adjusted when the backrest 13 is in the standing position of the trolley, the operating angle is proper, the backrest 13 can be easily and manually forced to adjust the inclination angle by the first operating member A in the first unlocking position, and the backrest 13 can be continuously pushed towards the seat 3 when the backrest 13 is in the steepest gear, so that the seat assembly is integrally folded back, and the operation is convenient.

As shown in fig. 10, the first operating member a includes a pulling member 6 and a protecting member 5, and the protecting member 5 is fastened to the pulling member 6 to cover the inner structure of the pulling member 6. In order to fix the first operating element a on the transverse tube of the U-shaped tube of the backrest portion 13, the arcuate mounting plate 10 is fixed on the U-shaped tube, the pulling element 6 may have a rectangular structure with an arc, a first end of the pulling element 6 is rotatably fixed on the mounting plate 10, a second end is a free end, and the pulling element 6 and a second end of the buckling element 5 may be integrally lifted upward to achieve unlocking.

As shown in fig. 5, two guide posts 101 are provided on the mounting plate 10 at intervals along the extending direction of the horizontal pipe. Two guide grooves 61 are formed in the inner side face of the pulling member 6 at intervals along the extending direction of the transverse tube, the guide grooves 61 can be of a U-shaped structure, the guide grooves 61 extend along the length direction of the seat assembly, the guide grooves 61 are located on the inner side of the guide posts 101, openings are formed in the side walls of the guide grooves 61, one force transmission member 11 penetrates into the guide grooves 61 from an opening in the top of the pulling member 6, penetrates through the openings in the side walls of the guide grooves 61, penetrates through the U-shaped tube of the backrest 13 after being guided by the guide posts 101, and finally is connected with the actuating members 16 on the same side.

As shown in fig. 6, when the second end of the first operating member a is pulled upwards, the force transmitting member 11 is pulled upwards, so that the actuating member 16 is driven to move upwards to unlock.

As shown in fig. 38, the joint assembly B further includes a first joint member 40 and a second joint member 17. The first joint member 40 is connected to the side end of the seat portion 3, and one first joint member 40 is provided at each of the end portions of the seat portion 3 on both sides in the width direction, and the first joint member 40 and the seat portion 3 may be fixedly connected or integrally formed. The backrest part 13, the second articulation part 17 and the actuating part 16 are always at the same angle. As shown in fig. 37, the second joint member 17 includes a first cover portion 171 and a first connection portion 172 that are connected to each other, the first cover portion 171 may be a circular cover that is fastened to the inner side of the first joint member 40 in the width direction of the seat assembly, the first connection portion 172 is connected to the backrest portion 13, the first connection portion 172 may be a tubular structure, and a U-shaped tube of the backrest portion 13 may be inserted into the first connection portion 172 and fixed by a quick-fastening structure or a fastener.

As shown in fig. 8, a first chute 173 is provided on the inner side of the first cover 171, and the actuator 16 is movably disposed in the first chute 173. Since the second joint member 17 is connected to the U-shaped tube of the backrest 13, the force transmitting member 11 can be directly connected to the actuating member 16 after passing through the U-shaped tube, the structure is simple, the force transmitting is stable, and the actuating member 16 can be prevented from being jammed during unlocking by the guiding action of the first chute 173.

The specific structural form of each lock unlocking member will be given in detail below.

In some embodiments, as shown in FIG. 9, the joint assembly B further includes a first articular component 40 coupled to a lateral end of the seat portion 3. The first locking and unlocking means includes a plurality of first catching grooves 401, for example, rectangular, triangular or trapezoidal catching grooves, provided on an inner side surface of the first joint member 40 in the width direction of the seat assembly and spaced apart in the rotation direction of the backrest portion 13, and a boss 161 fixed to the actuating member 16 and configured to be caught in one of the first catching grooves 401 when the first operating member a is in the first locking position so as to fix the backrest portion 13 with respect to the seat portion 3, and to be disengaged from the first catching groove 401 when the first operating member a is in the first unlocking position so as to perform inclination adjustment of the backrest portion 13.

As shown in fig. 9, a boss 161 is provided on the outer side surface of the actuator 16 in the width direction, and the boss 161 may be fixed to the actuator 16 or integrally formed. Alternatively, the boss 161 may be provided at the bottom of the actuator 16.

When the first operating element a is in the first locking position as shown in fig. 10, the second operating element 14 is engaged with the second joint element 17, and the actuating element 16 is positioned at the bottommost end under the action of the second restoring element 15, and the boss 161 is engaged into one of the first engaging grooves 401, so that the backrest portion 13 is fixed with respect to the seat portion 3, as shown in fig. 8 and 9.

When the first operating member a is pulled up to the first unlocking position as shown in fig. 13, the actuating member 16 moves up under the traction of the force transmitting member 11 and is disengaged from the first catching groove 401 as shown in fig. 11 and 12, the rotational constraint on the backrest portion 13 is released, and the backrest portion 13 can be tilt-adjusted. As shown in fig. 14, when the boss 161 is fitted into the rightmost first card slot 401, the backrest 13 is positioned at the steepest angular shift, when the boss 161 is fitted into the leftmost first card slot 401, the backrest 13 is positioned at the slowest angular shift, and when the boss 161 is fitted into the middle first card slot 401, the backrest 13 is positioned at the middle angular shift.

In some embodiments, as shown in FIG. 17, the actuator 16 rotates with the second articulation piece 17 and the backrest portion 13, and the second lock unlocking member includes a first tab 163, a thrust assembly, and a snap block 30.

The first protrusion 163 is fixed to the outer side of the actuating member 16 in the width direction, a first slope is provided on the first protrusion 163, and the first protrusion 163 may be fixed to the actuating member 16 or integrally provided with the actuating member 16, and more preferably, the boss 161, the first protrusion 163 and the actuating member 16 are integrally formed.

As shown in fig. 16, a thrust member is provided on the outer side of the actuator 16 in the width direction, the thrust member is provided with a second projection 322 on the side facing the first projection 163, the second projection 322 is provided with a second inclined surface 3222, the thrust member is provided with a second locking groove 331 in the circumferential direction, and an engaging block 30 is connected to the armrest portion 2 and configured to be fitted into the second locking groove 331 when the first operating member a is in the first locking position so as to fix the armrest portion 2 with respect to the seat portion 3.

When the boss 161 is embedded in the first clamping groove 401 at the rightmost side, the backrest 13 is positioned at the steepest inclination gear, and the first inclined surface and the second inclined surface are about to be contacted. The first inclined surface is configured to contact the second inclined surface 3222 during the continuous rotation of the backrest portion 13 beyond the steepest inclination angle gear position of the inclination angle, and disengage the engagement block 30 from the second engagement groove 331 by the movement cooperation of the first and second inclined surfaces 3222 to unlock the second locking and unlocking member.

This embodiment can convert the upward movement of the actuating member 16 into the first locking and unlocking member, and convert the rotational movement of the backrest portion 13 driving the actuating member 16 into the unlocking force of the second locking and unlocking member, so that the unlocking of the two locking and unlocking structures is relatively independent, and the adjustment and folding of the seat assembly can be more reliable.

Still referring to FIG. 17, the thrust assembly includes a first thrust disc 32 and a second thrust disc 33.

As shown in fig. 40, the first thrust disc 32 includes a disc body 321 and a second bump 322, the second bump 322 is disposed on a side of the disc body 321 facing the first bump 163, a plane 3221 and a second inclined plane 3222 are disposed on the second bump 322 along a circumferential direction of the disc body 321, and in a process that the first operating element a is in the first unlocking position and the backrest portion 13 rotates toward the seat portion 3, the first inclined plane and the second inclined plane 3222 move relatively along the circumferential direction, and when reaching the plane 3221, the second locking and unlocking component is unlocked and is stably in the unlocking position.

Preferably, as shown in fig. 40, two second protrusions 322 are provided and are disposed in a central symmetry manner with respect to the center line of the thrust assembly, so that the inclination directions of the second inclined surfaces 3222 on the two second protrusions 322 are the same. Accordingly, the first bump 163 is also provided in two. Wherein the centre line of the thrust assembly coincides with the axis of rotation of the backrest part 13 and the armrest part 2. By providing the two second projections 322, the first projections 163 can apply axial thrust to both sides of the first thrust disk 32, so that the applied force is more stable, and thus unlocking of the second locking and unlocking member is more reliable.

As shown in fig. 17, the second thrust disk 33 is coaxially disposed with the first thrust disk 32, a second clamping groove 331 is provided on a sidewall of the second thrust disk 33, a groove bottom of the second clamping groove 331 is an inclined surface, and a radial dimension of the groove bottom gradually increases from outside to inside along a width direction. The outer end face of the first thrust disk 32 in the width direction is provided with teeth 3221, and the end face of the second thrust disk 33 facing the first thrust disk 32 is also provided with teeth so that the first thrust disk 32 and the second thrust disk 33 are fitted together, and in any state of the backrest 13, the first thrust disk 32 and the second thrust disk 33 are rigidly contacted, have no relative displacement, can synchronously move in the axial direction, and cannot rotate under the clamping position of the pin shaft 18. In addition, in any state of the backrest portion 13, the first thrust disk 32 and the second thrust disk 33 are both proximate to the actuator 16 under the action of the first return element 36.

As shown in fig. 15 and 16, when the first operating element a is in the first locking position, the engagement block 30 is fitted into the second engagement groove 331 by the third reset element 29 to fix the armrest portion 2 with respect to the seat portion 3.

As shown in fig. 17 to 20, in the process of turning back the backrest part 13 toward the seat part 3 when the first operating member a is in the first unlocking position, the backrest part 13 drives the actuator 16 to rotate, and the movement cooperation of the first inclined surface and the second inclined surface 3222 causes the first thrust disc 32 and the second thrust disc 33 to move outward in the width direction together so as to push the engaging block 30 out of the second engaging groove 331 through the groove bottom of the second engaging groove 331, referring to fig. 20. Since the rotational restriction on the armrest portion 2 is released, as shown in fig. 21, the armrest portion 2 can be rotationally retracted toward the seat portion 3, and at this time, the backrest portion 13 can be rotationally retracted toward the seat portion 3 in a state where it is also in contact restriction. As shown in fig. 22, the seat member is in a fully folded-back state.

Further, an inclined surface is disposed at an end of the engaging block 30 and is matched with a bottom of the second engaging groove 331. The structure can enable the bottom of the second clamping groove 331 to provide a more stable driving force for the clamping block 30 so as to realize unlocking.

As shown in fig. 18 and 39, the joint assembly B further includes a third joint member 31, where the third joint member 31 includes a ring portion 311 and a second connection portion 312 that are connected to each other, the ring portion 311 is coaxially sleeved outside the thrust assembly and is located outside the first joint member 40 in the width direction, the second connection portion 312 is connected to the armrest portion 2, the armrest portion 2 may have a U-shaped structure, the second connection portion 312 may have a tubular structure, and an end portion of the U-shaped structure may be inserted into the second connection portion 312 and connected by a fastener or a quick-insertion structure. The inner wall of the annular portion 311 is provided with a guide groove 313 extending along the inside of the second connecting portion 312. Wherein the engaging block 30 is slidably disposed in the guide groove 313.

As shown in fig. 18, a fourth restoring member, such as a spring or the like, is provided between the bottom of the guide groove 313 and the engagement block 30 to fit the engagement block 30 into the guide groove 313 after the seat assembly is unfolded.

As shown in fig. 26, the joint assembly B further includes a first joint member 40 connected to the side end of the seat portion 3, the first joint member 40 including a first disk portion 400 coaxially provided, a shaft portion 402 and an annular first flange portion 403, the shaft portion 402 extending at least in the width direction toward the outside of the first disk portion 400, the first flange portion 403 being provided on the side surface of the first disk portion 400 in the width direction outward and being located radially outward of the shaft portion 402, and a cover 38 coaxially provided with the first joint member 40, the cover 38 including a second disk portion 381 and an annular second flange portion 382, the second flange portion 382 being provided opposite to and abutting the first flange portion 403.

The third joint member 31 is disposed between the first disc portion 400 and the second disc portion 381 in the width direction and sleeved on the circumferential outer sides of the first flange portion 403 and the second flange portion 382, as shown in fig. 41, the inner walls of the first flange portion 403 and the second flange portion 382 are provided with internal splines, the thrust assembly is sleeved on the shaft portion 402, and the outer wall of the thrust assembly is provided with external splines matched with the internal splines, so that the thrust assembly moves in the width direction through the motion matching of the first inclined surface and the second inclined surface 3222, and the engaging block 30 is separated from the second clamping groove 331.

Specifically, the first thrust plate 32 and the second thrust plate 33 are coaxially provided on the shaft portion 402, and the outer peripheral side wall of the second thrust plate 33 is provided with external splines, and the first thrust plate 32 is capable of biasing the second thrust plate 33 to move in a space formed by the first flange portion 403 and the second flange portion 382.

As shown in fig. 20, the joint assembly B further includes a first return element 36, such as a spring, sleeved outside the shaft 402 and between the thrust assembly and the cover 38, configured to return the thrust assembly after the backrest portion 13 and the armrest portion 2 are deployed relative to the seat portion 3. To improve stability of the reduction, the joint assembly B further includes a second reduction element 34, the first reduction element 36 is sleeved outside the second reduction element 34, the first reduction element 36 abuts against the second thrust disc 33, and the second reduction element 34 abuts against the first thrust disc 32.

To prevent the thrust assembly from rotating in the circumferential direction, the shaft portion 402 is provided with a plurality of key grooves 404 at intervals in the circumferential direction, as shown in fig. 38. As shown in fig. 40, the first thrust disk 32 is provided with a through hole 3212 in the axial direction, and a plurality of protrusions 3213 that are engaged with the key grooves 404 are provided on the inner wall of the through hole 3212 at intervals. As shown in fig. 32, a thrust member 35 is provided between the first return element 36 and the cover 38, and the thrust member 35 is inserted through the shaft 402 and is engaged with the shaft 402 by a key groove to prevent circumferential rotation.

Next, the present disclosure also provides a stroller including the above-described embodiment of the stroller seat assembly.

In some embodiments, the stroller further comprises a frame configured to support the stroller seat assembly. As shown in fig. 23 to 35, the joint assembly B further includes a first joint member 40, a third lock unlocking member, and a second operating member 14.

Wherein, as shown in fig. 38, the first joint member 40 is connected to the side end of the seat portion 3, and the first joint member 40 is provided with a mounting hole 405 along the rotational axis of the backrest portion 13 and the armrest portion 2.

As shown in fig. 26, the third lock unlocking member includes a shaft 23 and a hole provided on the vehicle frame, the shaft 23 coaxially passing through the first joint member 40, and the shaft 23 being movably provided along the rotation axis with respect to the first joint member 40 to achieve unlocking of the third lock unlocking member.

The second operating member 14 is configured to extend the end of the axle 23 outwardly to engage the aperture to secure the stroller seat assembly relative to the frame in the second locked position and retract the axle 23 out of engagement with the aperture to allow the stroller seat assembly to be removed from the frame as a whole and folded back upon removal when moved to the second unlocked position.

As shown in fig. 26 to 28, the second operating member 14 is provided with a third inclined surface 141, and the third locking and unlocking member further includes a sleeve member 39 coaxially and fixedly provided in the mounting hole 405, the inner end of the sleeve member 39 passing through the actuating member 16 and the second operating member 14 in sequence, a guide groove 394 is provided on a side wall of the sleeve member 39 along the rotation axis, and the pin 18 passes through the shaft 23 and the guide groove 394 in the radial direction, and an outer side wall of the pin 18 contacts the third inclined surface 141.

Wherein the second operating member 14 is configured to bring the pin 18 into contact with the lowermost position of the third ramp 141 in the second locked position, and to drive the pin 18 along the guide slot 394 by the third ramp 141 to retract the shaft 23 out of the bore during movement from the second locked position to the second unlocked position.

This embodiment enables movement of the pin 18 through the third ramp 141 during movement of the second operating member 14 to move the shaft 23 within the sleeve member 39 to effect locking of the shaft 23 to the frame when the seat assembly is extended into the aperture in the frame and to effect separation of the shaft 23 from the frame when the seat assembly is retracted out of the aperture in the frame.

As shown in fig. 28, the third inclined surface 141 gradually increases in thickness along the rotation axis from bottom to top to retract the pin 18 inwardly by sliding upward when the second operating member 14 is pressed. This structure is easy to apply force to the second operating members 14 to effect unlocking, and the seat assembly can be detached by applying pressing force to both the second operating members 14 simultaneously by providing one second operating member 14 on both the left and right sides of the seat portion 3.

As shown in fig. 28, the second operating member 14 is provided with a first through hole 142 along the rotation axis, for example, a oblong hole extending along the moving direction of the second operating member 14 is used, both sides of the first through hole 142 are provided with third inclined surfaces 141 with identical inclination angles, and both ends of the pin 18 are respectively overlapped on the third inclined surfaces 141 on both sides. The structure can enable the pin shaft 18 to move in the guide groove 394 more stably, the stress is balanced, and clamping stagnation is not easy to occur.

Further, as shown in fig. 27 and 28, the actuating member 16 is provided with a second through hole 162 along the rotation axis, for example, an oblong hole extending along the moving direction of the second operating member 14 is adopted, and the inner end of the sleeve member 39 sequentially passes through the second through hole 162 and the first through hole 142, and the oblong hole can provide a guide for the movement of the second operating member 14.

As shown in fig. 26, the joint assembly B further includes a second joint member 17 provided on the inner side of the first joint member 40 in the width direction and connected to the backrest portion 13, a fixing member 20 provided on the inner side end portion of the sleeve member 39 and configured to fix the sleeve member 39 to the second joint member 17, and a third restoring element 22, such as a spring, provided in the sleeve member 39 and located between the fixing member 20 and the end portion of the shaft 23 and configured to restore the shaft 23 when the second operating member 14 is in the second locking position.

Specifically, as shown in fig. 25, the sleeve member 39 is provided with a threaded section 393, a main body section 391 and a thrust section 392 in this order from inside to outside in the axial direction, and a guide groove 394 is provided in the main body section 391 and penetrates along the threaded section 393. The sleeve member 39 is threaded into the mounting hole 405 from the outside of the cover 38 until it passes out of the second knuckle member 17, and the securing member 20 includes a nut that is threaded onto the threaded section 393 outside of the second knuckle member 17 to secure the sleeve member 39.

As shown in fig. 28 and 36, the actuating member 16 is provided with a second slide groove 164 on the inner side in the width direction, the second operating member 14 is movably provided in the second slide groove 164, and the second operating member 14 coincides with the moving direction of the actuating member 16.

As shown in fig. 27, the joint assembly B further includes a second joint member 17 provided on the inner side of the first joint member 40 in the width direction and connected to the backrest portion 13, a stopper portion 144 provided between the second joint member 17 and the second operation member 14, for example, the stopper portion 144 is a stepped structure provided on the second operation member 14 and configured to stopper the second operation member 14 in the second locking position, and a second return element 15, for example, a spring provided between the second operation member 14 and the actuator 16, for example, between the bottom of the second operation member 14 and the actuator 16, configured to return the second operation member 14 when the first operation member a is in the first locking position, and to return the first operation member a when the second operation member 14 is in the second locking position.

The principle of the detachment of the seat assembly from the frame is specifically described below.

As shown in fig. 7, the second operating member 14 is located between the second and third joint members 17 and 31. As shown in fig. 23, when the second operating member 14 is in the second locked position, it is moved upward by the two second return elements 15 until the stopper 144 abuts against the second joint member 17, at which time the top of the second operating member 14 protrudes outward. As shown in fig. 24 and 25, the two ends of the pin 18 overlap the third inclined surfaces 141 on the two sides, respectively, and the shaft 23 extends out of the sleeve member 39 under the action of the third reset element 22, and drives the pin 18 to be at the lowest position of the third inclined surfaces 141. As shown in fig. 28, the second through hole 162 and the first through hole 142 are offset from each other in the height direction. At this point, the outer end of the axle 23 extends into a hole in the frame, leaving the seat assembly in a locked condition.

When the seat assembly is required to be detached from the frame, as shown in fig. 29, both hands simultaneously press the second operating members 14 on both sides of the seat plate portion 3, as shown in fig. 30, and in the course of the downward movement of the second operating members 14, the second restoring element 15 is compressed, and the pin shaft 18 moves upward along the third inclined surface 141 while moving inward in the width direction, driving the shaft 23 to move inward, as shown in fig. 31 and 32. At this point, the axle 23 is retracted inwardly and out of the aperture in the frame to unlock the third lock unlocking member and the frame assembly is removed from the frame.

The above describes in detail a stroller seat assembly and stroller provided by the present disclosure. Specific examples are set forth herein to illustrate the principles and embodiments of the present disclosure, and the above examples are merely intended to aid in understanding the methods of the present disclosure and the core ideas thereof. It should be noted that it would be apparent to those skilled in the art that various improvements and modifications could be made to the present disclosure without departing from the principles of the present disclosure, and such improvements and modifications would be within the scope of the claims of the present disclosure.

Claims

1. A baby stroller seat assembly, comprising:

Seat section (3);

A backrest portion (13) whose inclination angle relative to the seat portion (3) is adjustable;

An armrest portion (2) is disposed between the seat portion (3) and the backrest portion (13), and is rotatably disposed relative to the seat portion (3);

A joint assembly (B) connects the backrest portion (13), the armrest portion (2) and the seat portion (3), the joint assembly (B) comprising a first locking and unlocking component, a second locking and unlocking component and an actuating member (16) that rotates synchronously with the backrest portion (13), the first locking and unlocking component and the second locking and unlocking component are both connected to the actuating member (16); the joint assembly (B) further comprises: a first joint member (40) connected to a side end of the seat portion (3); and a second joint member (17) comprising a first cover portion (171) and a first connecting portion (172) that are connected to each other, the first cover portion (171) being buckled onto the inner side of the first joint member (40) along the width direction of the seat assembly, the first connecting portion (172) being connected to the backrest portion (13); a first sliding groove (173) being provided on the inner side of the first cover portion (171), the actuating member (16) being movably arranged in the first sliding groove (173);

a force transmission member (11); and

The first operating member (A) is connected to the actuating member (16) via the force transmission member (11), and is configured to, when moving to a first unlocking position, drive the actuating member (16) to move via the force transmission member (11), so that the first locking and unlocking member is unlocked by the movement of the actuating member (16), allowing the inclination angle of the backrest portion (13) relative to the seat portion (3) to be adjusted; and drive the actuating member (16) to rotate during the process of the backrest portion (13) rotating and folding back toward the seat portion (3), so that the second locking and unlocking member is unlocked by the rotation of the actuating member (16), allowing the armrest portion (2) to rotate and fold back toward the seat portion (3);

The first locking and unlocking component comprises: a plurality of first slots (401), which are arranged on the inner side surface of the first joint member (40) along the width direction of the seat assembly and are arranged at intervals along the rotation direction of the backrest portion (13); and a boss (161), which is fixed to the actuator (16) and is configured to be embedded in one of the first slots (401) when the first operating member (A) is in the first locking position, so that the backrest portion (13) is fixed relative to the seat portion (3); and to be disengaged from the first slot (401) when the first operating member (A) is in the first unlocking position, so as to adjust the inclination angle of the backrest portion (13).

2. The baby stroller seat assembly according to claim 1, characterized in that the backrest portion (13) comprises a U-shaped tube, and both ends of the U-shaped tube are connected to two side ends of the seat portion (3) along the width direction of the seat assembly through one of the joint components (B);

The first operating member (A) is arranged at a middle position of the transverse tube of the U-shaped tube, the force transmission member (11) is inserted into the U-shaped tube, the force transmission member (11) is connected to the first operating member (A), and is respectively connected to the actuating members (16) on both sides.

3. The stroller seat assembly according to claim 2 is characterized in that the first operating member (A) is arranged at the top of the cross tube, the first end of the first operating member (A) is rotatably connected to the cross tube, and the rotation axis is consistent with the extension direction of the cross tube, and the second end of the first operating member (A) is a free end, which is configured to reach the first unlocking position when moving in a direction away from the cross tube.

4. The baby stroller seat assembly according to claim 1, characterized in that the actuating member (16) rotates together with the backrest portion (13), and the second locking and unlocking component comprises:

a first protrusion (163) fixed to the outer side of the actuating member (16) along the width direction, the first protrusion (163) being provided with a first inclined surface;

a thrust assembly, arranged on the outer side of the actuating member (16) along the width direction, the thrust assembly being provided with a second protrusion (322) on the side facing the first protrusion (163), the second protrusion (322) being provided with a second inclined surface (3222), and a second groove (331) being provided in the circumferential direction of the thrust assembly; and

a snap-fit block (30) connected to the armrest portion (2) and configured to be embedded in the second snap-fit groove (331) when the first operating member (A) is in a first locking position, so as to fix the armrest portion (2) relative to the seat portion (3);

The first inclined surface is constructed to contact the second inclined surface (3222) when the backrest portion (13) continuously rotates beyond the steepest inclination angle, and the engaging block (30) is disengaged from the second engaging groove (331) through the movement coordination of the first inclined surface and the second inclined surface (3222), so that the second locking and unlocking component is unlocked.

5. The baby stroller seat assembly according to claim 4, wherein the thrust assembly comprises:

A first thrust plate (32) comprising a plate body (321) and the second protrusion (322), wherein the second protrusion (322) is arranged on a side of the plate body (321) facing the first protrusion (163); and

A second thrust plate (33) is coaxially arranged with the first thrust plate (32), the second clamping groove (331) being provided on the side wall of the second thrust plate (33), the bottom of the second clamping groove (331) being an inclined surface, and the radial dimension of the bottom of the groove gradually increasing from the outside to the inside along the width direction;

When the first operating member (A) is in the first unlocking position and the backrest portion (13) is rotated and folded back toward the seat portion (3), the movement of the first inclined surface and the second inclined surface (3222) cooperate to cause the first thrust plate (32) and the second thrust plate (33) to move outwardly along the width direction together, so as to push the engaging block (30) out of the second engaging groove (331) through the groove bottom of the second engaging groove (331).

6. The baby stroller seat assembly according to claim 5, characterized in that an end portion of the engaging block (30) is provided with an inclined surface, and matches with a groove bottom of the second engaging groove (331).

7. The baby stroller seat assembly according to claim 4, characterized in that two second protrusions (322) are provided and are centrally symmetrically arranged relative to the center line of the thrust assembly, and the center line of the thrust assembly is consistent with the rotation axis of the backrest portion (13) and the armrest portion (2).

8. The baby stroller seat assembly according to claim 4, characterized in that the joint assembly (B) further comprises:

The third joint component (31) comprises an annular portion (311) and a second connecting portion (312) which are connected to each other, wherein the annular portion (311) is coaxially sleeved outside the thrust assembly and is located outside the first joint component (40) along the width direction, and the second connecting portion (312) is connected to the armrest portion (2); the inner wall of the annular portion (311) is provided with a guide groove (313) extending inside the second connecting portion (312);

Wherein, the engaging block (30) is slidably disposed in the guide groove (313).

9. The baby stroller seat assembly according to claim 8, characterized in that the joint assembly (B) further comprises:

a first joint component (40) connected to a side end of the seat portion (3), the first joint component (40) comprising a coaxially arranged first disc portion (400), a shaft portion (402) and an annular first flange portion (403), the shaft portion (402) extending at least along the width direction toward the outside of the first disc portion (400), the first flange portion (403) being arranged on a side surface of the first disc portion (400) facing outward along the width direction and being radially located outside the shaft portion (402); and

a cover body (38) coaxially arranged with the first joint component (40), the cover body (38) comprising a second disc portion (381) and an annular second flange portion (382), the second flange portion (382) abutting against the first flange portion (403);

Wherein, the third joint component (31) is arranged between the first disc portion (400) and the second disc portion (381) along the width direction, and is sleeved on the circumferential outer side of the first flange portion (403) and the second flange portion (382); the inner walls of the first flange portion (403) and the second flange portion (382) are provided with internal splines, the thrust assembly is sleeved on the shaft portion (402), and the outer wall of the thrust assembly is provided with external splines that cooperate with the internal splines, so that the thrust assembly can be moved along the width direction through the movement cooperation of the first inclined surface and the second inclined surface (3222), thereby causing the locking block (30) to disengage from the second locking groove (331).

10. The baby stroller seat assembly according to claim 9 is characterized in that the joint assembly (B) further includes a first resetting element (36), which is arranged between the thrust assembly and the cover body (38) and is configured to reset the thrust assembly after the backrest portion (13) and the armrest portion (2) are unfolded relative to the seat portion (3).

11. A baby stroller, characterized by comprising the baby stroller seat assembly according to any one of claims 1 to 10.

12. The stroller according to claim 11, further comprising a frame configured to support the stroller seat assembly, the joint assembly (B) further comprising:

A first joint component (40) connected to a side end of the seat portion (3), wherein the first joint component (40) is provided with a mounting hole (405) along a rotation axis of the backrest portion (13) and the armrest portion (2);

a third locking and unlocking component, comprising a shaft (23) and a hole provided on the frame, wherein the shaft (23) coaxially passes through the first joint component (40), and the shaft (23) is movably arranged along the rotation axis relative to the first joint component (40); and

The second operating member (14) is configured to, when in the second locking position, cause the end of the shaft (23) to extend outward to cooperate with the hole so as to fix the baby stroller seat assembly relative to the frame; and when moving to the second unlocking position, cause the shaft (23) to retract to disengage from the hole so as to allow the baby stroller seat assembly to be detached from the frame.

13. The baby stroller according to claim 12, characterized in that the second operating member (14) is provided with a third inclined surface (141), and the third locking and unlocking component further comprises:

A sleeve member (39) is coaxially fixed in the mounting hole (405) and passes through the second operating member (14); a guide groove (394) is provided on a side wall of the sleeve member (39) along the rotation axis;

A pin shaft (18) passes through the shaft (23) and the guide groove (394) in a radial direction, and an outer side wall of the pin shaft (18) contacts the third inclined surface (141);

The second operating member (14) is configured to make the pin shaft (18) contact the lowest position of the third inclined surface (141) when in the second locking position; and in the process of moving from the second locking position to the second unlocking position, the pin shaft (18) is driven by the third inclined surface (141) to move along the guide groove (394) to drive the shaft (23) to retract and disengage from the hole.

14. The baby carriage according to claim 13, characterized in that the thickness of the third inclined surface (141) gradually increases from bottom to top along the rotation axis, so that when the second operating member (14) is pressed, the pin shaft (18) can be retracted inward by sliding upward.

15. The baby carriage according to claim 13, characterized in that a first through hole (142) is provided on the second operating member (14) along the rotation axis, third inclined surfaces (141) with the same inclination angle are provided on both sides of the first through hole (142), and two ends of the pin shaft (18) are respectively overlapped on the third inclined surfaces (141) on both sides.

16. The baby carriage according to claim 12, characterized in that a second sliding groove (164) is provided on the inner side of the actuating member (16) along the width direction;

The second operating member (14) is movably disposed in the second sliding groove (164), and the second operating member (14) and the actuating member (16) move in the same direction.

17. The baby stroller according to claim 16, characterized in that the joint assembly (B) further comprises:

a second joint component (17) disposed on the inner side of the first joint component (40) along the width direction and connected to the backrest portion (13); a limiting portion (144) is provided between the second joint component (17) and the second operating component (14) and is configured to limit the second operating component (14) in the second locking position; and

A second resetting element (15) is provided between the second operating member (14) and the actuating member (16), and is configured to reset the second operating member (14) when the first operating member (A) is in the first locking position; and to reset the first operating member (A) when the second operating member (14) is in the second locking position.

18. The baby stroller according to claim 13, characterized in that the joint assembly (B) further comprises:

A second joint component (17) is disposed on the inner side of the first joint component (40) along the width direction and is connected to the backrest portion (13);

a fixing member (20), disposed at an inner end portion of the sleeve member (39), and configured to fix the sleeve member (39) to the second joint member (17); and

A third resetting element (22) is disposed in the sleeve member (39) and is located between the fixing member (20) and the end of the shaft (23), and is configured to reset the shaft (23).