Baby stroller seat assembly and baby stroller

Abstract

The present disclosure relates to a baby stroller seat assembly and a baby stroller, wherein the seat assembly comprises: a seat portion, a backrest portion, wherein the inclination angle relative to the seat portion is adjustable; an armrest portion, which is rotatably arranged relative to the seat portion; a joint assembly, which connects the backrest portion, the armrest portion and the seat portion together, the joint assembly comprising a first locking and unlocking component, a second locking and unlocking component and an actuating member, wherein the first locking and unlocking component and the second locking and unlocking component are both connected to the actuating member, and the actuating member rotates synchronously with the backrest portion; a first operating member, which is connected to the actuating member via a force transmitting member, and is configured to drive the actuating member to move via the force transmitting member when moving to a first unlocking position, so as to unlock the first locking and unlocking component via the movement of the actuating member, thereby allowing the inclination angle of the backrest portion relative to the seat portion to be adjusted; and to drive the actuating member to rotate during the process of the backrest portion rotating and folding back toward the seat portion, so as to unlock the second locking and unlocking component via the rotation of the actuating member, thereby allowing the armrest portion to rotate and fold back toward the seat portion.

Description

Technical Field

[0001] The present disclosure relates to the technical field of children's products, and in particular to a baby stroller seat assembly and a baby stroller. Background Art

[0002] In order to improve the riding comfort, the current baby stroller is designed with a structure with adjustable backrest inclination. The backrest is upright when the baby is sitting in daily life, and the backrest is adjusted backward after the baby falls asleep. In addition, the baby stroller needs to be folded when it needs to be carried or stored. In order to achieve these two functions, the current baby stroller needs to be designed with a complex mechanism and is also difficult to operate. Summary of the invention

[0003] The embodiments of the present disclosure provide a baby stroller seat assembly and a baby stroller, which can more conveniently adjust and fold the seat assembly.

[0004] One aspect of an embodiment of the present disclosure provides a baby stroller seat assembly, comprising:

[0005] Seating Department;

[0006] The backrest is adjustable in inclination relative to the seat;

[0007] An armrest portion, disposed between the seat portion and the backrest portion, and rotatably disposed relative to the seat portion;

[0008] A joint assembly connects the backrest, the armrest and the seat together, the joint assembly includes a first locking and unlocking component, a second locking and unlocking component and an actuating member that rotates synchronously with the backrest, and the first locking and unlocking component and the second locking and unlocking component are both connected to the actuating member;

[0009] Force transmission parts;

[0010] The first operating member is connected to the actuator through a force transmission member, and is configured to drive the actuator to move through the force transmission member when moving to the first unlocking position, so as to unlock the first locking and unlocking component through the movement of the actuator, allowing the inclination angle of the backrest portion relative to the seat portion to be adjusted; and to drive the actuator to rotate during the process of the backrest portion rotating and folding back toward the seat portion, so as to unlock the second locking and unlocking component through the rotation of the actuator, allowing the armrest portion to rotate and fold back toward the seat portion.

[0011] In some embodiments, the backrest portion includes a U-shaped tube, and both ends of the U-shaped tube are connected to two side ends of the seat portion along the width direction of the seat assembly through a joint assembly respectively;

[0012] The first operating member is arranged at the middle position of the horizontal tube of the U-shaped tube, the force transmission member is passed through the U-shaped tube, the force transmission member is connected to the first operating member, and is respectively connected to the actuating members on both sides.

[0013] In some embodiments, the first operating member is disposed at the top of the transverse tube, the first end of the first operating member is rotatably connected to the transverse tube, and the rotation axis is consistent with the extension direction of the transverse tube, and the second end of the first operating member is a free end, which is configured to reach a first unlocking position when moving in a direction away from the transverse tube.

[0014] In some embodiments, the joint assembly further comprises:

[0015] A first joint member connected to a side end of the seat portion; and

[0016] The second joint component comprises a first cover portion and a first connection portion which are connected to each other, the first cover portion is buckled on the inner side of the first joint component along the width direction of the seat assembly, and the first connection portion is connected to the backrest portion;

[0017] Wherein, a first sliding groove is provided on the inner side of the first cover body, and the actuating member is movably arranged in the first sliding groove.

[0018] In some embodiments, the joint assembly further includes: a first joint member connected to a side end of the seat portion;

[0019] The first locking and unlocking component comprises:

[0020] A plurality of first slots are provided on the inner side surface of the first joint member along the width direction of the seat assembly and are arranged at intervals along the rotation direction of the backrest portion; and

[0021] The boss is fixed on the actuator and is configured to be embedded in one of the first slots when the first operating member is in the first locking position to fix the backrest portion relative to the seat portion; and to be disengaged from the first slot when the first operating member is in the first unlocking position to adjust the inclination of the backrest portion.

[0022] In some embodiments, the actuator rotates together with the backrest portion, and the second locking and unlocking component includes:

[0023] A first protrusion is fixed on the outer side of the actuating member along the width direction, and a first inclined surface is provided on the first protrusion;

[0024] A thrust assembly is arranged outside the actuator along the width direction, the thrust assembly is provided with a second protrusion on the side facing the first protrusion, the second protrusion is provided with a second inclined surface, and a second groove is provided in the circumferential direction of the thrust assembly; and

[0025] A locking block connected to the armrest portion and configured to be embedded in the second locking groove when the first operating member is in the first locking position, so as to fix the armrest portion relative to the seat portion;

[0026] The first inclined surface is constructed to contact the second inclined surface when the backrest continues to rotate beyond the steepest inclination angle, and the engaging block is disengaged from the second slot through the movement coordination of the first inclined surface and the second locking release.

[0027] In some embodiments, the thrust assembly includes:

[0028] A first thrust plate, comprising a plate body and a second protrusion, wherein the second protrusion is arranged on a side of the plate body facing the first protrusion; and

[0029] The second thrust plate is coaxially arranged with the first thrust plate, and a second clamping groove is arranged on the side wall of the second thrust plate, the bottom of the second clamping groove is an inclined surface, and the radial dimension of the bottom of the groove gradually increases from the outside to the inside along the width direction;

[0030] When the first operating member is in the first unlocked position and the backrest portion is rotated back toward the seat portion, the movement of the first inclined surface and the second inclined surface cooperates to move the first thrust plate and the second thrust plate outward along the width direction together to push the locking block out of the second locking slot through the bottom of the second slot.

[0031] In some embodiments, an end of the engaging block is provided with an inclined surface, and matches with the bottom of the second engaging groove.

[0032] In some embodiments, two second protrusions 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 and the armrest portion.

[0033] In some embodiments, the joint assembly further comprises:

[0034] The third joint part comprises an annular portion and a second connecting portion connected to each other, the annular portion is coaxially sleeved outside the thrust assembly and located outside the first joint part in the width direction, and the second connecting portion is connected to the armrest portion; the inner wall of the annular portion is provided with a guide groove extending inside the second connecting portion;

[0035] Wherein, the engaging block is slidably arranged in the guiding groove.

[0036] In some embodiments, the joint assembly further comprises:

[0037] a first joint member connected to a side end of the seat portion, the first joint member comprising a first disc portion, a shaft portion and an annular first flange portion which are coaxially arranged, the shaft portion at least extending toward the outside of the first disc portion along the width direction, the first flange portion being arranged on a side surface of the first disc portion facing outward along the width direction and being radially located outside the shaft portion; and

[0038] A cover body is coaxially arranged with the first joint part, the cover body comprises a second disc portion and an annular second flange portion, the second flange portion abuts against the first flange portion;

[0039] Among them, the third joint part is arranged between the first disc part and the second disc part in the width direction, and is sleeved on the circumferential outer side 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 internal splines, the thrust assembly is sleeved on the shaft part, 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, so that the locking block can be disengaged from the second locking groove.

[0040] In some embodiments, the joint assembly further comprises a first resetting element disposed between the thrust assembly and the cover body, and configured to reset the thrust assembly after the backrest portion and the armrest portion are unfolded relative to the seat portion.

[0041] Another aspect of the embodiments of the present disclosure provides a baby stroller, comprising the baby stroller seat assembly of the above embodiments.

[0042] In some embodiments, the invention further comprises a frame configured to support a baby carriage seat assembly, and the joint assembly further comprises:

[0043] A first joint part connected to a side end of the seat part, the first joint part having a mounting hole along a rotation axis of the backrest part and the armrest part;

[0044] A third locking and unlocking component includes a shaft and a hole provided on the frame, the shaft coaxially passes through the first joint component, and the shaft is movably provided along the rotation axis relative to the first joint component; and

[0045] The second operating member is configured to, when in the second locking position, cause the end of the shaft 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 to retract to disengage from the hole so as to allow the baby stroller seat assembly to be detached from the frame.

[0046] In some embodiments, the second operating member is provided with a third inclined surface, and the third locking and unlocking component further comprises:

[0047] A sleeve member is coaxially fixed in the mounting hole and passes through the second operating member, and a guide groove is provided on the side wall of the sleeve member along the rotation axis;

[0048] A pin shaft passes through the shaft and the guide groove in a radial direction, and an outer side wall of the pin shaft contacts the third inclined surface;

[0049] Among them, the second operating member is configured to make the pin shaft contact with the lowest position of the third inclined surface 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 is driven to move along the guide groove through the third inclined surface to drive the shaft to retract and disengage from the hole.

[0050] In some embodiments, the thickness of the third inclined surface gradually increases from bottom to top along the rotation axis, so that when the second operating member is pressed, the pin shaft can be retracted inward by sliding upward.

[0051] In some embodiments, a first through hole is provided on the second operating member along the rotation axis, third inclined surfaces with the same inclination angle are provided on both sides of the first through hole, and both ends of the pin shaft are respectively overlapped on the third inclined surfaces on both sides.

[0052] In some embodiments, a second slide groove is provided on the inner side of the actuating member along the width direction;

[0053] The second operating member is movably disposed in the second sliding groove, and the moving directions of the second operating member and the actuating member are consistent.

[0054] In some embodiments, the joint assembly further comprises:

[0055] A second joint component is provided on the inner side of the first joint component along the width direction and is connected to the backrest portion, a limiting portion is provided between the second joint component and the second operating component and is configured to limit the second operating component in the second locking position; and

[0056] The second resetting element is disposed between the second operating member and the actuating member, and is configured to reset the second operating member when the first operating member is in the first locking position; and reset the first operating member when the second operating member is in the second locking position.

[0057] In some embodiments, the joint assembly further comprises:

[0058] A second joint component is disposed on the inner side of the first joint component along the width direction and connected to the backrest portion;

[0059] a fixing member, disposed at an inner end portion of the sleeve member, configured to fix the sleeve member to the second joint member; and

[0060] The third resetting element is disposed in the sleeve member and between the fixing member and the end of the shaft, and is configured to reset the shaft.

[0061] In the baby stroller seat assembly of the disclosed embodiment, the first operating member is configured to, when moving to the first unlocking position, drive the actuator to move through the force transmission member, so that the first locking and unlocking component is unlocked by the movement of the actuator, allowing the inclination of the backrest relative to the seat portion to be adjusted; and in the process of the backrest rotating and folding back toward the seat portion, the actuator is driven to rotate through the backrest, so that the second locking and unlocking component is unlocked by the rotation of the actuator, allowing the armrest portion to rotate and fold back toward the seat portion. This seat assembly can conveniently adjust the inclination of the backrest, and when the first operating member is in the first unlocking position, the entire seat assembly can be conveniently folded back for folding, which can simplify the mechanism, facilitate operation, and make the adjustment and folding of the seat assembly more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0063] Figure 1 are perspective views of some embodiments of the baby stroller seat assembly disclosed herein;

[0064] Figure 2 Exploded views of some embodiments of the baby stroller seat assembly of the present disclosure;

[0065] Figure 3 It is a front structural schematic diagram of a backrest in some embodiments of the baby stroller seat assembly disclosed herein;

[0066] Figure 4 It is a schematic diagram of the back structure of the backrest in some embodiments of the baby stroller seat assembly disclosed herein;

[0067] Figure 5 It is a cross-sectional view of a first operating member installed on a backrest portion in some embodiments of the baby stroller seat assembly disclosed herein;

[0068] Figure 6 for Figure 5 A cross-sectional view showing the first operating member being lifted relative to the backrest;

[0069] Figure 7 It is a side structural schematic diagram of some embodiments of the baby stroller seat assembly disclosed in the present invention;

[0070] Figure 8 The first operating member is in the first locking position, and is an inner side perspective view of the first locking and unlocking component;

[0071] Fig. 9 The first locking and unlocking component is viewed from an outer side when the first operating member is in the first locking position;

[0072] Fig.10 for Figure 4 The enlarged view at K in FIG. 1 corresponds to a schematic diagram of the first operating member being in the first locking position;

[0073] Fig.11 The first operating member is moved to the first unlocking position, and is an inner side perspective view of the first locking and unlocking component;

[0074] Fig.12 The first locking and unlocking component is viewed from an outer side when the first operating member moves to the first unlocking position;

[0075] Fig.13 is a schematic diagram of a state when the first operating member moves to a first unlocking position;

[0076] Fig.14 It is a schematic diagram of the backrest being in three tilt adjustment positions;

[0077] Fig.15 The inside perspective view of the second locking and unlocking component when the first operating member is in the first locking position;

[0078] Fig.16 The first operating member is in the first locking position, and is viewed from the outside of the second locking and unlocking member;

[0079] Fig.17 is a three-dimensional diagram showing that when the first operating member is in the first locking position, the second locking and unlocking member is in a locked state;

[0080] Fig.18 is an inner side perspective view showing that the second locking and unlocking component is in an unlocked state when the first operating member is in a first unlocking position;

[0081] Fig.19 An outer perspective view showing that the second locking and unlocking component is in an unlocked state when the first operating member is in a first unlocking position;

[0082] Fig. 20 is a three-dimensional diagram showing that when the first operating member is in the first unlocking position, the second locking and unlocking member is in the unlocking state;

[0083] Fig.21 A schematic diagram of the backrest being folded back toward the armrest;

[0084] Fig. 22 A schematic diagram showing that the backrest and the armrest are both folded back toward the seat;

[0085] Fig.23 is a schematic diagram of the second operating member being in the second locking position;

[0086] Fig.24 is a structural schematic diagram of the third locking and unlocking component when the second operating member is in the second locking position;

[0087] Fig.25 It is a three-dimensional diagram of the matching structure of the sleeve member, the shaft and the pin shaft when the second operating member is in the second locking position;

[0088] Fig.26 is a cross-sectional view of the joint assembly when the second operating member is in the second locking position;

[0089] Fig. 27 is a medial perspective view of the joint assembly after being cut away when the second operating member is in the second locking position;

[0090] Fig.28is a structural schematic diagram of the cooperation between the second operating member and the actuating member when the second operating member is in the second locking position;

[0091] Fig.29 is a schematic diagram of the second operating member being in a second unlocking position;

[0092] Fig.30 is a structural schematic diagram of the third locking and unlocking component when the second operating member is in the second unlocking position;

[0093] Fig.31 It is a three-dimensional diagram of the matching structure of the sleeve member, the shaft and the pin shaft when the second operating member is in the second unlocking position;

[0094] Fig.32 is a cross-sectional view of the joint assembly when the second operating member is in a second unlocking position;

[0095] Fig.33 is a cutaway inner side perspective view of the joint assembly when the second operating member is in the second unlocking position;

[0096] Fig.34 is a structural schematic diagram of the cooperation between the second operating member and the actuating member when the second operating member is in the second unlocking position;

[0097] Fig.35 is a structural schematic diagram of a second operating member;

[0098] Fig.36 is a schematic diagram of the structure of the actuator;

[0099] Fig.37 is a schematic structural diagram of a second joint component;

[0100] Fig.38 is a schematic diagram of the structure in which the first joint component is installed on the seat portion;

[0101] Fig.39 is a schematic structural diagram of the third joint;

[0102] Fig.40 is a structural schematic diagram of the first thrust plate;

[0103] Fig.41 is a schematic diagram of the structure of the cover;

[0104] Fig.42 FIG. 1 is an exploded view of a baby stroller according to the present disclosure as an embodiment of an assembly. DETAILED DESCRIPTION

[0105] The present disclosure is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Each aspect so defined can be combined with any other aspect or aspects, unless explicitly stated not to be combined. In particular, any feature that is considered to be preferred or advantageous can be combined with one or more other features that are considered to be preferred or advantageous.

[0106] The terms "first", "second", etc. that appear in the present disclosure are only for the convenience of description to distinguish different components with the same name, and do not indicate a sequence or a primary and secondary relationship.

[0107] In the description of the present disclosure, it should be understood that the terms "inside", "outside", "top", "bottom", "front", "back", "left" and "right" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present disclosure. Among them, the directions "front", "back", "left" and "right" are all defined by the direction in which the baby sits in the seat assembly. Among them, the length direction refers to the front-to-back direction of the baby stroller seat assembly, and the width direction refers to the left-to-right direction of the baby stroller seat assembly.

[0108] The present disclosure provides a baby stroller, which includes a frame and a baby stroller seat assembly (hereinafter referred to as the "seat assembly"). The frame is configured to support the seat assembly, and the frame enables the baby stroller to move when an external force is applied. The seat assembly can be installed as a whole on the frame for an infant or child to sit on, for example, in a detachable manner.

[0109] Figures 1 to 42 FIG. 1 is a schematic diagram of the structure of the baby stroller seat assembly of the present invention. Figure 1 As shown, the seat assembly includes: a seat portion 3, a backrest portion 12, an armrest portion 2, a footrest portion 4, a joint assembly B, a force transmission member 11 and a first operating member A.

[0110] The backrest 13 is connected to the upper part of the rear end of the seat part 3, and the inclination angle relative to the seat part 3 is adjustable. At least one U-shaped frame 1 is rotatably arranged on the backrest 13, and the frame 1 is fixed on the canopy to realize the folding and unfolding of the canopy. The armrest 2 is arranged between the seat part 3 and the backrest 13, and is rotatably arranged relative to the seat part 3. The footrest 4 is connected to the lower part of the front end of the seat part 3.

[0111] The joint assembly B connects the backrest 13, the armrest 2 and the seat 3 together, and the backrest 13 and the armrest 2 are detachably arranged. The joint assembly B includes a first locking and unlocking component, a second locking and unlocking component and an actuator 16, and the first locking and unlocking component and the second locking and unlocking component are both connected to the actuator 16, and the actuator 16 rotates synchronously with the backrest 13. Preferably, the center line of the joint assembly B is consistent with the rotation axis of the backrest 13 and the armrest 2 to simplify the structure.

[0112] 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 a thin and long structure capable of transmitting force, such as a steel wire rope, a chain, or a fiber rope. The first operating member A has two positions, including a first locking position and a first unlocking position.

[0113] The first operating member A is configured to fix the backrest 13, the armrest 2 and the seat 3 when it is in the first locking position; and when it moves to the first unlocking position, the force transmission member 11 drives the actuator 16 to move, so that the first locking and unlocking component is unlocked by the movement of the actuator 16, allowing the inclination angle of the backrest 13 relative to the seat 3 to be adjusted, and continuous adjustment or multi-stage adjustment can be performed, for example, the first locking and unlocking component is unlocked by the movement of the actuator 16; and when the first operating member A is in the first locking position so that the first locking and unlocking component is in an unlocked state, and the backrest 13 is rotated and folded back toward the seat 3, the backrest 13 drives the actuator 16 to move, so that the second locking and unlocking component is unlocked by the rotation of the actuator 16, allowing the armrest 2 to rotate and fold back toward the seat 3. At this time, since the first locking and unlocking component is also unlocked, the armrest 2 and the backrest 13 can both be folded back relative to the seat 3 to achieve folding of the seat component.

[0114] The seat assembly of this embodiment of the present disclosure can conveniently adjust the inclination angle of the backrest portion, and when the first operating member is in the first unlocking position, the entire seat assembly can be conveniently folded back for folding, which can simplify the mechanism, facilitate operation, and make the adjustment and folding of the seat assembly more convenient.

[0115] like Figure 2 As shown, the backrest 13 includes a U-shaped tube, and the two ends of the U-shaped tube are connected to the two side ends of the seat part 3 along the width direction of the seat assembly through a joint assembly B; the U-shaped tube includes two vertical tubes and a horizontal tube connected to the top ends of the two vertical tubes. The first operating member A is arranged in the middle position of the horizontal tube of the U-shaped tube, and 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 actuators 16 on both sides.

[0116] By passing the force transmission member 11 through the U-shaped tube of the backrest 13, the guiding function of the U-shaped tube can be fully utilized when the force transmission member 11 is pulled, and the force transmission member 11 will not fall out, thereby providing reliability of locking and unlocking and simplifying the structure of the seat assembly.

[0117] In order to support the back of the occupant, the backrest 13 further includes a support member, and the two ends of the support member in the width direction are connected to the two vertical tubes of the U-shaped tube. For example, the support member can be made of a flexible material, such as a support cloth or a support net, which can reduce the weight of the seat assembly and is easy to carry; or the support member can be made of a rigid material, such as a plastic support plate.

[0118] The force transmission member 11 can be connected in two ways: first, two force transmission members 11 are used, and the two force transmission members 11 are respectively located on both sides of the U-shaped tube, and one end of each force transmission member 11 is connected to the first operating member A, and the other end is connected to the actuating member 16. Second, a complete force transmission member 11 is used, and the two ends of the force transmission member 11 are respectively connected to the two actuating members 16, and the first operating member A is passed through the middle.

[0119] like Figure 3 and Figure 4 As shown, 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 a first unlocking position when moving in a direction away from the cross tube.

[0120] This structure realizes unlocking by pulling the first operating member A upwards, which enables the user to perform the unlocking operation more conveniently. The inclination angle of the backrest 13 can be adjusted when the stroller is in a standing position. The operating angle is suitable, and it is easy to apply force to the backrest 13 by hand when the first operating member A is in the first unlocking position to adjust the inclination angle of the backrest 13; and when the backrest 13 is in the steepest gear, continue to push it toward the seat part 3, so that the seat assembly can be folded back as a whole, which is easy to operate.

[0121] like Fig.10 As shown, the first operating member A includes: a pull member 6 and a protective member 5, and the protective member 5 is buckled on the pull member 6 to cover the structure inside the pull member 6. In order to fix the first operating member A on the horizontal tube of the U-shaped tube of the backrest 13, an arc-shaped mounting plate 10 is fixed on the U-shaped tube, and the pull member 6 can be a rectangular structure with an arc. The first end of the pull member 6 is rotatably fixed on the mounting plate 10, and the second end is a free end. The second ends of the pull member 6 and the buckling member 5 can be lifted upward as a whole to achieve unlocking.

[0122] like Figure 5As shown, two guide posts 101 are provided at intervals along the extension direction of the transverse tube on the mounting plate 10. Two guide grooves 61 are provided at intervals along the extension direction of the transverse tube on the inner side surface of the pull member 6. The guide groove 61 may be a U-shaped structure. The guide groove 61 extends along the length direction of the seat assembly. The guide groove 61 is located on the inner side of the guide post 101, and an opening is provided on the side wall of the guide groove 61. After a force transmission member 11 passes through the opening at the top of the pull member 6 into the guide groove 61, it passes through the opening on the side wall of the guide groove 61, and passes through the U-shaped tube of the backrest 13 after being guided by the guide post 101, and finally connects with the actuator 16 on the same side.

[0123] like Figure 6 As shown, when the second end of the first operating member A is pulled upward, the force transmission member 11 is pulled upward, thereby driving the actuating member 16 to move upward to achieve unlocking.

[0124] like Fig.38 As shown, the joint assembly B also includes: a first joint component 40 and a second joint component 17. The first joint component 40 is connected to the side end of the seat portion 3. The seat portion 3 is provided with a first joint component 40 at each end along the width direction. The first joint component 40 and the seat portion 3 can be fixedly connected or integrally formed. The backrest portion 13, the second joint component 17 and the actuator 16 are always at the same angle. Fig.37 As shown, the second joint component 17 includes a first cover body portion 171 and a first connecting portion 172 which are connected to each other. The first cover body portion 171 can be a circular cover, which is snapped onto the inner side of the first joint component 40 along the width direction of the seat assembly; the first connecting portion 172 is connected to the backrest portion 13, and the first connecting portion 172 can be a tubular structure. The U-shaped tube of the backrest portion 13 can be inserted into the first connecting portion 172 and fixed by a quick-fit structure or fasteners.

[0125] Among them, Figure 8 As shown, a first slide groove 173 is provided on the inner side of the first cover body 171, and the actuator 16 is movably arranged in the first slide groove 173. Since the second joint 17 is connected to the U-shaped tube of the backrest 13, the force transmission member 11 can be directly connected to the actuator 16 after passing through the U-shaped tube, the structure is simple, the force transmission is stable, and the guiding effect of the first slide groove 173 can prevent the actuator 16 from getting stuck during the unlocking process.

[0126] The specific structural forms of each locking and unlocking component will be given in detail below.

[0127] In some embodiments, Fig. 9As shown, the joint assembly B further includes: a first joint member 40 connected to the side end of the seat portion 3. The first locking and unlocking component includes: a plurality of first slots 401, for example, rectangular, triangular or trapezoidal slots, provided on the inner side surface of the first joint member 40 along the width direction of the seat assembly, and spaced along the rotation direction of the backrest portion 13; and a boss 161, fixed on the actuator 16, 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 of the backrest portion 13.

[0128] like Fig. 9 As shown, the boss 161 is arranged on the outer side of the actuator 16 along the width direction, and the boss 161 can be fixed on the actuator 16 or integrally formed. Optionally, the boss 161 can also be arranged at the bottom of the actuator 16.

[0129] like Fig.10 As shown, when the first operating member A is in the first locking position, as shown in Figure 8 and Fig. 9 As shown, the second operating member 14 is engaged with the second joint member 17 , and the actuating member 16 is located at the bottom under the action of the second reset element 15 . At this time, the boss 161 is engaged in one of the first slots 401 , so that the backrest portion 13 is fixed relative to the seat portion 3 .

[0130] like Fig.13 As shown in FIG. 1 , when the first operating member A is moved upward to the first unlocking position, as shown in FIG. Fig.11 and Fig.12 As shown, the actuating member 16 moves upward under the traction of the force transmission member 11 and disengages from the first slot 401, thereby releasing the rotation constraint on the backrest portion 13, and the backrest portion 13 can be adjusted in inclination. Fig.14 As shown, when the boss 161 is embedded in the first slot 401 on the far right, the backrest 13 is located at the steepest inclination angle; when the boss 161 is embedded in the first slot 401 on the far left, the backrest 13 is located at the gentlest inclination angle; when the boss 161 is embedded in the first slot 401 in the middle, the backrest 13 is located at the middle inclination angle.

[0131] In some embodiments, Fig.17 As shown, the actuating member 16 rotates together with the second joint member 17 and the backrest portion 13 , and the second locking and unlocking component includes: a first protrusion 163 , a thrust assembly and a snap block 30 .

[0132] The first protrusion 163 is fixed to the outer side of the actuator 16 along the width direction. The first protrusion 163 is provided with a first inclined surface. The first protrusion 163 can be fixed to the actuator 16 or integrally provided with the actuator 16. More preferably, the boss 161, the first protrusion 163 and the actuator 16 are integrally formed.

[0133] like Fig.16 As shown, the thrust assembly is arranged on the outer side of the actuator 16 along the width direction, and the thrust assembly is provided with a second protrusion 322 on the side facing the first protrusion 163, and the second protrusion 322 is provided with a second inclined surface 3222, and the thrust assembly is provided with a second slot 331 in the circumferential direction; and the locking block 30 is connected to the armrest portion 2 and is configured to be embedded in the second slot 331 when the first operating member A is in the first locking position, so as to fix the armrest portion 2 relative to the seat portion 3.

[0134] When the boss 161 is inserted into the first slot 401 on the far right, the backrest 13 is at the steepest inclination gear, and the first inclined surface and the second inclined surface are about to contact. The first inclined surface is configured to contact the second inclined surface 3222 during the continuous rotation of the backrest 13 beyond the steepest inclination gear, and the engaging block 30 is disengaged from the second slot 331 through the movement cooperation of the first inclined surface and the second inclined surface 3222, so that the second locking and unlocking component is unlocked.

[0135] This embodiment can convert the upward movement of the actuator 16 into a first locking and unlocking component, and convert the rotational movement of the actuator 16 driven by the backrest 13 into an unlocking force of the second locking and unlocking component, so that the unlocking of the two locking and unlocking structures is relatively independent, which can make the adjustment and folding of the seat assembly more reliable.

[0136] Still refer to Fig.17 The thrust assembly includes: a first thrust plate 32 and a second thrust plate 33 .

[0137] Among them, Fig.40 As shown, the first thrust plate 32 includes a plate body 321 and a second protrusion 322. The second protrusion 322 is arranged on the side of the plate body 321 facing the first protrusion 163. A plane 3221 and a second inclined surface 3222 are provided on the second protrusion 322 along the circumference of the plate body 321. When the first operating member A is in the first unlocking position and the backrest portion 13 rotates toward the seat portion 3, the first inclined surface and the second inclined surface 3222 move relative to each other 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.

[0138] Preferably, if Fig.40As shown, two second protrusions 322 are provided, and they are centrally symmetrically arranged relative 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. Correspondingly, two first protrusions 163 are also provided. The center line of the thrust assembly is consistent with the rotation axis of the backrest 13 and the armrest 2. By providing two second protrusions 322, the first protrusion 163 can apply axial thrust to both sides of the first thrust plate 32, so that the force application is more stable, thereby making the unlocking of the second locking and unlocking component more reliable.

[0139] like Fig.17 As shown, the second thrust plate 33 is coaxially arranged with the first thrust plate 32, and a second slot 331 is arranged on the side wall of the second thrust plate 33, and the bottom of the second slot 331 is an inclined surface, and the radial dimension of the bottom of the slot gradually increases from the outside to the inside along the width direction. The first thrust plate 32 is provided with teeth 3221 on the outer end surface along the width direction, and the second thrust plate 33 is also provided with teeth on the end surface facing the first thrust plate 32, so that the first thrust plate 32 and the second thrust plate 33 are embedded together, and when the backrest portion 13 is in any state, the first thrust plate 32 and the second thrust plate 33 are in rigid contact, without relative displacement, can be synchronously moved along the axial direction, and cannot rotate under the locking position of the pin shaft 18. In addition, when the backrest portion 13 is in any state, the first thrust plate 32 and the second thrust plate 33 are close to the actuator 16 under the action of the first reset element 36.

[0140] like Fig.15 and Fig.16 As shown, when the first operating member A is in the first locking position, the engaging block 30 is embedded in the second engaging groove 331 under the action of the third resetting element 29 to fix the armrest portion 2 relative to the seat portion 3 .

[0141] like Figures 17 to 20 As shown in FIG. 1 , when the first operating member A is in the first unlocking position, the backrest portion 13 is rotated and folded back toward the seat portion 3, and the backrest portion 13 drives the actuating member 16 to rotate. The movement of the first inclined surface and the second inclined surface 3222 cooperates to make the first thrust plate 32 and the second thrust plate 33 move outward 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. Fig. 20 Since the rotation constraint on the armrest 2 is released, Fig.21 As shown, the armrest portion 2 can be rotated and retracted toward the seat portion 3, and the backrest portion 13 is also in a contact restrained state and can be rotated and retracted toward the seat portion 3. Fig. 22 As shown, the seat part is in the fully folded-back state.

[0142] Furthermore, the end of the engaging block 30 is provided with an inclined surface, and matches with the bottom of the second engaging slot 331. This structure enables the bottom of the second engaging slot 331 to provide a more stable driving force for the engaging block 30 to achieve unlocking.

[0143] like Fig.18 and Fig.39 As shown, the joint assembly B also includes a third joint component 31, and the third joint component 31 includes an annular portion 311 and a second connecting portion 312 that are connected to each other. The annular portion 311 is coaxially sleeved outside the thrust assembly and is located on the outside of the first joint component 40 along the width direction. The second connecting portion 312 is connected to the armrest portion 2. The armrest portion 2 can adopt a U-shaped structure. The second connecting portion 312 can adopt a tubular structure. The end of the U-shaped structure can be inserted into the second connecting portion 312 and connected by a fastener or a quick-insert structure. The inner wall of the annular portion 311 is provided with a guide groove 313 extending inside the second connecting portion 312. Among them, the locking block 30 can be slidably arranged in the guide groove 313.

[0144] like Fig.18 As shown, a fourth reset element, such as a spring, is provided between the bottom of the guide groove 313 and the engaging block 30 to enable the engaging block 30 to be embedded in the guide groove 313 after the seat assembly is unfolded.

[0145] like Fig.26 As shown, the joint assembly B also includes: a first joint component 40, which is connected to the side end of the seat portion 3, the first joint component 40 includes a coaxially arranged first disc portion 400, a shaft portion 402 and an annular first flange portion 403, the shaft portion 402 extends at least along the width direction toward the outside of the first disc portion 400, the first flange portion 403 is arranged on the side surface of the first disc portion 400 facing outward along the width direction, and is radially located outside the shaft portion 402; and a cover body 38, which is coaxially arranged with the first joint component 40, the cover body 38 includes a second disc portion 381 and an annular second flange portion 382, ​​the second flange portion 382 is arranged opposite to and abuts against the first flange portion 403.

[0146] The third joint part 31 is disposed between the first disc part 400 and the second disc part 381 along the width direction, and is sleeved on the circumferential outer side of the first flange part 403 and the second flange part 382; Fig.41 The first flange portion 403 and the second flange portion 382 have internal splines on their inner walls, the thrust assembly is sleeved on the shaft portion 402, and the outer wall of the thrust assembly has external splines that cooperate with the internal splines, so that the thrust assembly can move 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.

[0147] Specifically, the first thrust plate 32 and the second thrust plate 33 are coaxially sleeved on the shaft portion 402 , and an external spline is provided on the outer peripheral side wall of the second thrust plate 33 . The first thrust plate 32 can apply force to the second thrust plate 33 to move in the space enclosed by the first flange portion 403 and the second flange portion 382 .

[0148] like Fig. 20 As shown, the joint assembly B further includes a first resetting element 36, such as a spring, which is sleeved outside the shaft portion 402 and disposed 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. In order to improve the stability of the reset, the joint assembly B further includes a second resetting element 34, the first resetting element 36 is sleeved outside the second resetting element 34, the first resetting element 36 abuts against the second thrust plate 33, and the second resetting element 34 abuts against the first thrust plate 32.

[0149] In order to prevent the thrust assembly from rotating in the circumferential direction, Fig.38 As shown, the shaft portion 402 is provided with a plurality of keyways 404 at intervals along the circumferential direction. Fig.40 As shown, the first thrust plate 32 is provided with a through hole 3212 along the axial direction, and a plurality of protrusions 3213 cooperating with the key slot 404 are arranged at intervals on the inner wall of the through hole 3212. Fig.32 As shown, a thrust piece 35 is provided between the first reset element 36 and the cover body 38 . The thrust piece 35 is passed through the shaft portion 402 , and is also matched with the shaft portion 402 through a keyway to prevent circumferential rotation.

[0150] Secondly, the present disclosure also provides a baby stroller, comprising the baby stroller seat assembly of the above embodiment.

[0151] In some embodiments, the stroller further comprises a frame configured to support a stroller seat assembly. Figures 23 to 35 As shown, the joint assembly B further includes: a first joint component 40 , a third locking and unlocking component and a second operating component 14 .

[0152] Among them, Fig.38 As shown, the first joint component 40 is connected to the side end of the seat portion 3 , and the first joint component 40 is provided with a mounting hole 405 along the rotation axis of the backrest portion 13 and the armrest portion 2 .

[0153] like Fig.26 As shown, the third locking and unlocking component includes a shaft 23 and a hole provided on the frame, 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 to achieve unlocking of the third locking and unlocking component.

[0154] 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 completely removed from the frame, and the seat assembly can be folded after removal.

[0155] like Figure 26 to Figure 28 As shown, the second operating member 14 is provided with a third inclined surface 141, and the third locking and unlocking component also includes: a sleeve member 39, which is coaxially fixed in the mounting hole 405, and the inner end of which passes through the actuator 16 and the second operating member 14 in sequence, and a guide groove 394 is provided on the side wall of the sleeve member 39 along the rotation axis; a pin shaft 18, which radially passes through the shaft 23 and the guide groove 394, and the outer side wall of the pin shaft 18 contacts the third inclined surface 141.

[0156] In which, 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 to move along the guide groove 394 through the third inclined surface 141 to drive the shaft 23 to retract and disengage from the hole.

[0157] This embodiment can drive the pin shaft 18 to move through the third inclined surface 141 during the movement of the second operating member 14, thereby driving the shaft 23 to move in the sleeve member 39, so that the shaft 23 is locked with the frame when it protrudes out of the seat assembly and enters the hole on the frame, and the shaft 23 is separated from the frame when it retracts the seat assembly and detaches from the hole on the frame.

[0158] like Fig.28 As shown, the thickness of the third inclined surface 141 gradually increases from bottom to top along the rotation axis, so that the pin shaft 18 can be retracted inward by sliding upward when the second operating member 14 is pressed. This structure makes it easy to apply force to the second operating member 14 to achieve unlocking, and a second operating member 14 is provided on both sides of the seat portion 3. By applying pressing force to the two second operating members 14 at the same time, the seat assembly can be disassembled.

[0159] like Fig.28 As shown, the second operating member 14 is provided with a first through hole 142 along the rotation axis, for example, an oblong hole extending along the moving direction of the second operating member 14 is used, and both sides of the first through hole 142 are provided with third inclined surfaces 141 with the same inclination angle, and the two ends of the pin shaft 18 are respectively overlapped on the third inclined surfaces 141 on both sides. This structure can make the movement of the pin shaft 18 in the guide groove 394 more stable, the force is balanced, and it is not easy to get stuck.

[0160] Furthermore, if Fig. 27 and Fig.28As shown, a second through hole 162 is opened on the actuator 16 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 passes through the second through hole 162 and the first through hole 142 in sequence, and the oblong hole can provide guidance for the movement of the second operating member 14.

[0161] like Fig.26 As shown, the joint assembly B also includes: a second joint component 17, which is arranged on the inner side of the first joint component 40 along the width direction and is connected to the backrest portion 13; a fixing component 20, which is arranged at the inner end of the sleeve component 39 and is configured to fix the sleeve component 39 on the second joint component 17; and a third resetting element 22, such as a spring, which is arranged in the sleeve component 39 and is located between the fixing component 20 and the end of the shaft 23, and is configured to reset the shaft 23 when the second operating component 14 is in the second locking position.

[0162] Specifically, Fig.25 As shown, the sleeve member 39 is provided with a threaded section 393, a main section 391 and a thrust section 392 in sequence from the inside to the outside along the axial direction, and a guide groove 394 is provided on the main section 391 and passes through the threaded section 393. The sleeve member 39 passes through the mounting hole 405 from the outside of the cover body 38 until it passes through the second joint member 17, and the fixing member 20 includes a nut, which is screwed with the threaded section 393 outside the second joint member 17 to achieve the fixing of the sleeve member 39.

[0163] like Fig.28 and Fig.36 A second slide groove 164 is provided on the inner side of the actuator 16 along the width direction, and the second operating member 14 is movably provided in the second slide groove 164 , and the moving directions of the second operating member 14 and the actuator 16 are consistent.

[0164] like Fig. 27 As shown, the joint assembly B also includes: a second joint component 17, which is arranged on the inner side of the first joint component 40 along the width direction and is connected to the backrest portion 13, and a limiting portion 144 is provided between the second joint component 17 and the second operating component 14, for example, the limiting portion 144 is a step structure provided on 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, such as a spring, which is provided between the second operating component 14 and the actuator 16, for example, provided between the bottom of the second operating component 14 and the actuator 16, and is configured to reset the second operating component 14 when the first operating component A is in the first locking position; and reset the first operating component A when the second operating component 14 is in the second locking position.

[0165] The principle of disassembling the seat assembly from the vehicle frame is described in detail below.

[0166] like Figure 7As shown, the second operating member 14 is located between the second joint member 17 and the third joint member 31. Fig.23 As shown, when the second operating member 14 is in the second locking position, it moves upward under the action of the two second reset elements 15 until the limiting portion 144 abuts against the second joint member 17, and the top of the second operating member 14 protrudes outward. Fig.24 and Fig.25 As shown, the two ends of the pin 18 are respectively overlapped on the third inclined surfaces 141 on both sides, and the shaft 23 extends out of the sleeve member 39 under the action of the third reset element 22, and at the same time drives the pin 18 to the lowest position of the third inclined surface 141. Fig.28 Shown, the second through hole 162 and the first through hole 142 are staggered in height. At this moment, the outer end of axle 23 extends into the hole on the frame, so that the seat assembly is in a locked state.

[0167] When the seat assembly needs to be removed from the frame, Fig.29 As shown, both hands simultaneously press the second operating members 14 on both sides of the seat plate 3, as shown in FIG. Fig.30 As shown in FIG. 1 , during the downward movement of the second operating member 14, the second reset element 15 is compressed, and the pin 18 moves upward along the third inclined surface 141 and moves inward along the width direction, driving the shaft 23 to move inward, as shown in FIG. Fig.31 and Fig.32 At this time, the shaft 23 is retracted inwardly and disengaged from the hole on the frame, so that the third locking and unlocking component is unlocked, and the frame assembly can be removed from the frame.

[0168] The above is a detailed introduction to a baby stroller seat assembly and a baby stroller provided by the present disclosure. Specific embodiments are used herein to illustrate the principles and implementation methods of the present disclosure. The description of the above embodiments is only used to help understand the method and core idea of ​​the present disclosure. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present disclosure, several improvements and modifications can be made to the present disclosure, and these improvements and modifications also fall within the scope of protection of the claims of the present disclosure.

Claims

1. A baby stroller seat assembly, characterized in that: include: 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) connecting 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 both being connected to the actuating member (16); The joint assembly (B) further comprises: a first joint component (40) connected to a side end of the seat portion (3); and a second joint component (17) comprising a first cover portion (171) and a first connection portion (172) connected to each other, wherein the first cover portion (171) is buckled onto the inner side of the first joint component (40) along the width direction of the seat assembly, and the first connection portion (172) is connected to the backrest portion (13); a first slide groove (173) is provided on the inner side of the first cover portion (171), and the actuator (16) is movably arranged in the first slide 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 component via a joint component (B) respectively; 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 baby stroller seat assembly according to claim 2, characterized in that: The first operating member (A) is arranged at the top of the transverse tube, the first end of the first operating member (A) is rotatably connected to the transverse tube, and the rotation axis is consistent with the extension direction of the transverse 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 transverse 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, characterized in that: 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: The end of the locking block (30) is provided with an inclined surface, and matches with the bottom of the second locking 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, characterized in that: The joint assembly (B) further comprises 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 in that: The invention comprises a baby carriage seat assembly as described in any one of claims 1 to 10.

12. The baby stroller according to claim 11, characterized in that: Also includes a frame configured to support the baby carriage 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 stroller 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 inwardly by sliding upward.

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

16. The baby stroller 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).

Images