Child safety seat

Abstract

Disclosed in the present application is a child safety seat, comprising: a seat portion; a backrest portion, which is pivotally connected to the seat portion and pivots relative to the seat portion between an unfolded position and a folded position; and a locking mechanism operable to lock or unlock the pivot between the backrest portion and the seat portion, wherein a mounting block is provided at a lower end of the backrest portion, and a mounting groove for accommodating the mounting block is provided at a rear end of the seat portion. The locking mechanism comprises a movable locking portion and a locking counterpart cooperating with the locking portion, wherein the locking portion is disposed on one of the mounting block and the mounting groove, the locking counterpart is disposed on the other one of the mounting block and the mounting groove, and when the backrest portion pivots towards the unfolded position, the mounting block is inserted into the mounting groove to allow the locking portion to be engaged with the locking counterpart.

Description

Child safety seats Technical Field

[0001] This invention relates to the field of children's products, and in particular to a child safety seat. Background Technology

[0002] Some foldable child safety seats on the market use a pivot connection between the backrest and seat cushion. When not in use, the backrest can be rotated towards the seat to fold, thus saving storage space. However, existing foldable child safety seats still occupy a considerable amount of space when folded, and their structure is not compact enough. Summary of the Invention

[0003] According to one aspect of the present invention, a child safety seat is provided, comprising a backrest, a seat, and a pivoting mechanism. The seat includes a seat body and a pair of armrests located on either side of the seat body. The backrest includes a first backrest and a second backrest connected to the first backrest, the first backrest being connected to the armrests, and the second backrest having a pair of side wings. The pivoting mechanism is disposed between the first backrest and the seat to allow the backrest to rotate relative to the seat between an unfolded position and a folded position. When the backrest is in the folded position, the first backrest is located between the pair of armrests, and the seat body is located between the pair of side wings.

[0004] Optionally, the lower end of the side wing has a positioning part, which is configured to restrict the movement of the backrest relative to the seat body when the backrest is in the folded position.

[0005] Optionally, the positioning part is a receiving recess, which is provided on the inner side of the side wing and configured to receive part of the seat body when the backrest is in the folded position.

[0006] Optionally, the pivoting mechanism includes a pivot hole and a pivot member that mates with the pivot hole. The pivot hole is located on one of the first backrest portion and the armrest portion, and the pivot member is located on the other of the first backrest portion and the armrest portion.

[0007] Optionally, the child safety seat also includes a locking mechanism. The locking mechanism is located between the first backrest and the seat, and is operable to lock rotation between the backrest and the seat. The locking mechanism is spaced apart from the pivoting mechanism, allowing the backrest to be positioned in the unfolded position when the locking mechanism locks the pivoting between the backrest and the seat; and allowing the backrest to pivot to the folded position when the locking mechanism releases the lock between the backrest and the seat.

[0008] Optionally, the first backrest has a protruding mounting block, and the seat body has a mounting groove; the locking mechanism includes an operable locking part and a matching locking part that cooperates with the locking part, the locking part being disposed on one of the mounting block and the mounting groove, and the matching locking part being disposed on the other of the mounting block and the mounting groove, wherein when the backrest is in the unfolded position, the mounting block is inserted into the mounting groove to allow the locking part to engage with the matching locking part.

[0009] Optionally, the mounting block is located at the lower end of the first backrest and is provided with a handle. When the backrest is in the folded position, the handle is exposed outside the mounting groove.

[0010] Optionally, the mounting block has a partition groove, and a guide rib is formed in the mounting groove. The top of the guide rib is an arc surface. When the backrest is in the unfolded position, the guide rib is inserted into the partition groove to guide the mounting block to pivot in the mounting groove.

[0011] Optionally, the mounting block has a receiving groove extending in the lateral direction, a locking part is disposed in the receiving groove and can extend and retract inward and outward along the receiving groove, and a locking part is a recess formed on the inner wall of the mounting groove; wherein, the recess has a protruding limiting part inside to divide the recess into a first recess and a second recess, and when the locking part extends into the first recess or the second recess, the backing part is in the unfolded position.

[0012] Optionally, the locking part has a limiting groove extending in its length direction, and the backing part has a limiting pin, which passes through the limiting groove to limit the extension and retraction stroke of the locking part; wherein, when the locking part extends into the first recess, at least a portion of the limiting groove is located in the recess, so that the limiting pin can be positioned from the first recess to the second recess by deforming into the receiving groove when it abuts the limiting part.

[0013] According to one aspect of the present invention, a child safety seat is provided, comprising: a backrest, a seat, a pivoting mechanism, and a locking mechanism. The backrest has side wings on both sides, and a receiving recess at the lower end of each side wing. The pivoting mechanism is disposed between the backrest and the seat to allow the backrest to rotate relative to the seat between an unfolded position and a folded position. The locking mechanism is disposed between the backrest and the seat, and is operable to lock the rotation between the backrest and the seat. When the locking mechanism locks the backrest and the seat, the backrest is allowed to be positioned in one of a plurality of unfolded positions; when the locking mechanism releases the lock between the backrest and the seat, the backrest is allowed to pivot to a folded position, wherein the receiving recess is configured to receive a portion of the seat body when the backrest is in the folded position.

[0014] According to another aspect of the present invention, a child safety seat is provided, comprising: a backrest, a seat, a pivoting mechanism, and a locking mechanism. The pivoting mechanism is disposed between the backrest and the seat to allow the backrest to rotate relative to the seat between an unfolded position and a folded position; the locking mechanism is disposed between the backrest and the seat and is operable to lock the rotation between the backrest and the seat; when the locking mechanism locks the backrest and the seat, it allows the backrest to be positioned in one of a plurality of unfolded positions; when the locking mechanism releases the lock between the backrest and the seat, it allows the backrest to pivot to a folded position.

[0015] According to one aspect of this disclosure, a child safety seat is proposed, comprising: a seat portion, a backrest portion pivotally connected to the seat portion and pivoting relative to the seat portion between an unfolded position and a folded position; a locking mechanism operable to lock or release the pivoting between the backrest portion and the seat portion, wherein the lower end of the backrest portion is provided with a mounting block, and the rear end of the seat portion is provided with a mounting groove for receiving the mounting block; wherein the locking mechanism includes a movable locking portion and a matching locking portion cooperating with the locking portion, the locking portion being disposed in one of the mounting block and the mounting groove, and the matching locking portion being disposed in the other of the mounting block and the mounting groove, wherein during the pivoting of the backrest portion toward the unfolded position, the mounting block is inserted into the mounting groove to allow the locking portion to engage with the matching locking portion.

[0016] In one embodiment, the locking part is disposed on the mounting block, and the locking part is a recess formed in the mounting groove. The recess has a plurality of locking slots, so that the locking part can be inserted into different locking slots to lock the backing part in different unfolded positions.

[0017] In one embodiment, the recess is provided with a protruding limiting portion inside to divide the recess into the plurality of locking grooves.

[0018] In one embodiment, the lower part of the backrest is provided with a backrest pivot structure, and the lateral sides of the seat are provided with seat pivot structures. A pivot shaft passes through and connects the backrest pivot structure and the seat pivot structure, so that the backrest is pivotally connected to the seat. The lateral area of ​​the seat pivot structure is larger than the lateral area of ​​the backrest pivot structure, so that a seat belt guide channel is formed between the lower front edge of the backrest and the front edge of the seat pivot structure. Moreover, when the backrest is locked in different unfolded positions, the position of the lower front edge of the backrest relative to the front edge of the seat pivot structure changes, causing the lateral area of ​​the seat belt guide channel to change.

[0019] In one embodiment, the backrest is provided with a pair of side wings, and the inner side surface of the lower end of the side wings is provided with a receiving recess, the receiving recess being configured to receive a portion of the seat when the backrest is in the folded position.

[0020] In one embodiment, the lower end of the backrest is provided with a handle, which is configured to protrude between the backrest and the seat when the backrest is pivoted relative to the seat to the folded position.

[0021] In one embodiment, the handle is disposed on the mounting block, and the mounting groove is provided with a handle receiving groove. The handle receiving groove is configured to receive and avoid the handle during the process of the backrest pivoting relative to the seat to the unfolded position.

[0022] In one embodiment, the handle receiving slot is provided with a blocking structure, which is configured to prevent the backrest from pivoting from the unfolded position toward a direction away from the seat.

[0023] In one embodiment, the blocking structure is the inner wall of the handle receiving groove.

[0024] In one embodiment, the seat portion is provided with a cup, which is slidably disposed on the seat portion via a sliding mechanism. The sliding mechanism includes: a limiting groove formed in one of the seat portion and the cup; and a fastener connected to the other of the seat portion and the cup and sliding along the limiting groove. The limiting groove is provided with a limiting structure, which is configured to hold the fastener at at least one position in the limiting groove.

[0025] In one embodiment, the limiting structure is a limiting protrusion disposed near the two ends of the limiting groove.

[0026] In one embodiment, the mounting block has a partition groove, and a guide rib is formed in the mounting groove. The top of the guide rib is an arc surface. When the backrest is in the unfolded position, the guide rib is inserted into the partition groove to guide the mounting block into the mounting groove.

[0027] In one embodiment, the mounting block has a receiving groove extending in a lateral direction, and the locking part is disposed in the receiving groove and can extend or retract into the mounting block along the receiving groove.

[0028] In one embodiment, the locking part has a limiting groove extending in its length direction, and the backing part has a limiting pin that passes through the limiting groove to limit the extension and retraction stroke of the locking part; wherein, when the locking part extends into one of the locking slots, at least a portion of the limiting groove is located within the recess, such that when the limiting pin abuts against the limiting part, it can deform into the receiving groove to position the locking part from one of the locking slots to the other locking slot.

[0029] In one embodiment, the locking part is disposed on the mounting block, and the locking part is a recessed part formed in the mounting groove. The recessed part is provided with a limiting member, so that the insertion end of the locking part can abut against the limiting member, so that the backrest part stays in different unfolded positions.

[0030] In one embodiment, the limiting member is fixed to the inner bottom surface of the recess.

[0031] In one embodiment, the limiting member has a fixing protrusion and the recessed portion has a fixing recess, the fixing protrusion being able to engage with the fixing recess so that the limiting member is fixed to the recess.

[0032] In one embodiment, the limiting member includes a damping pad that abuts against the insertion end of the locking portion and a mounting pad for fixing the damping pad thereon, the fixing protrusion being disposed on the mounting pad.

[0033] In one embodiment, the damping pad and the mounting pad can be integrally formed as the limiting member.

[0034] In one embodiment, a retaining mechanism is provided between the backrest and the seat, the retaining mechanism being configured to elastically hold the backrest and the seat in the folded position when the backrest is pivoted relative to the seat.

[0035] In one embodiment, the retaining mechanism includes: a retaining elastic member disposed in one of the backrest portion and the seat portion, and a retaining structure disposed in the other of the backrest portion and the seat portion, wherein the retaining elastic member is configured to engage or disengage with the retaining structure after elastic deformation.

[0036] In one embodiment, the retaining elastic element includes a spring sheet and an elastic element protrusion disposed on the spring sheet, the retaining structure being a retaining hole, and the elastic element protrusion being able to be inserted into the retaining hole.

[0037] In one embodiment, the backrest portion is provided with a backrest portion pivot structure, the seat portion is provided with a seat portion pivot structure, a pivot shaft passes through and connects the backrest portion pivot structure and the seat portion pivot structure, such that the backrest portion is pivotally connected to the seat portion, wherein the retaining elastic member is provided in one of the backrest portion pivot structure and the seat portion pivot structure, and the retaining recess is provided in the other of the backrest portion pivot structure and the seat portion pivot structure.

[0038] In one embodiment, the backrest further includes: a first backrest assembly pivotally connected to the seat portion; a second backrest assembly movably disposed on the first backrest assembly and movable between a first position and a second position; and an operating mechanism including: a release operating member disposed on the second backrest assembly; and a first release driving member, wherein when the second backrest assembly is in the first position, the first release driving member engages with the locking portion so that the release operating member can drive the locking portion to release; and when the second backrest assembly moves away from the first position, the first release driving member disengages from the locking portion.

[0039] In one embodiment, the operating mechanism further includes a back-mounted component locking member disposed on the first back-mounted component or the second back-mounted component, for operably locking movement between the first back-mounted component and the second back-mounted component; and a second release drive member connected to the release drive member and the back-mounted component locking member, wherein the release drive member is configured to drive the back-mounted component locking member to release the lock between the first back-mounted component and the second back-mounted component via the second release drive member.

[0040] In one embodiment, the locking part is provided with a mating groove, and the first release drive member includes: a linkage structure pivotally connected to the first backing component, and an operation traction member disposed between the release operation member and the linkage structure, such that the release operation member drives the linkage structure through the operation traction member. A first movable end of the linkage structure is connected to the operation traction member, and a second movable end of the linkage structure can drive the locking part to disengage from the mating part. When the second backing component is located in the first position, the second movable end of the linkage structure can be inserted into the mating groove of the locking part, so that the second movable end of the linkage structure can drive the locking part. When the second backing component moves away from the first position, the second movable end of the linkage structure disengages from the mating groove.

[0041] In one embodiment, the first backrest assembly is a backrest body; the second backrest assembly is a headrest plate, the headrest plate being slidably disposed on the backrest body, and the backrest assembly locking member being a headrest locking pin; the backrest body includes a slide groove that allows the headrest plate to slide and a plurality of position slots arranged on both sides of the slide groove, the headrest locking pin being able to extend out of the headrest plate and insert into one of the plurality of position slots on the backrest body, so that the headrest plate is held in one of the plurality of position slots relative to the backrest body.

[0042] In another embodiment, this disclosure provides a seat back assembly, comprising: a seat portion; a first back assembly pivotally connected to the seat portion; a second back assembly slidably disposed on the first back assembly and slidable between a first position and a second position; a release operation member disposed on the second back assembly; a locking portion disposed on the first back assembly for operably locking the first back assembly and the seat portion; and a first release drive member, wherein when the second back assembly is in the first position, the first release drive member engages with the locking portion so that the release operation member can drive the locking portion to release; and when the second back assembly moves away from the first position, the first release drive member disengages from the locking portion.

[0043] In one embodiment, the seat backrest assembly further includes a backrest assembly locking member disposed on the first backrest assembly or the second backrest assembly for operably locking the sliding between the first backrest assembly and the second backrest assembly; and a second release drive member connected to the release drive member and the backrest assembly locking member, wherein the release drive member is configured to drive the backrest assembly locking member to release the lock between the first backrest assembly and the second backrest assembly via the second release drive member.

[0044] The foregoing and other objects, features, aspects and advantages of the invention will become more apparent from the following detailed description of the invention taken in conjunction with the accompanying drawings. Attached Figure Description

[0045] The accompanying drawings are included herein to provide a further understanding of the invention and are incorporated in and form a part of this specification. The drawings illustrate embodiments of the invention and, together with the following description, serve to illustrate the concept of the invention.

[0046] In the attached diagram:

[0047] Figure 1 shows a perspective view of the child safety seat according to the first embodiment in the unfolded position;

[0048] Figure 2 shows a perspective view of the child safety seat according to the first embodiment in the folded position;

[0049] Figure 3 shows a cross-sectional view of the child safety seat in Figure 2 along section line II;

[0050] Figure 4 shows a rear view of the child safety seat according to the first embodiment in the folded position;

[0051] Figure 5 shows a perspective view of the seat portion of a child safety seat according to the first embodiment;

[0052] Figure 6 shows a bottom view of the child safety seat according to the first embodiment in the folded position;

[0053] Figure 7 shows a rear view of a child safety seat according to the first embodiment;

[0054] Figure 8 shows a cross-sectional view of Figure 7;

[0055] Figure 9 shows an exploded perspective view of a child safety seat according to the first embodiment;

[0056] Figure 10 shows a side view of the backrest in a first angular position according to the first embodiment;

[0057] Figure 11 shows a cross-sectional view of the child safety seat in Figure 10 along section line II-II;

[0058] Figure 12 shows a side view of the backrest in a second angular position according to the first embodiment;

[0059] Figure 13 shows a cross-sectional view of the child safety seat in Figure 12 along section line II-II;

[0060] Figure 14 shows a front perspective view of a child safety seat according to the second embodiment;

[0061] Figure 15 shows a front exploded perspective view of a child safety seat according to the second embodiment;

[0062] Figure 16 shows a bottom view of the child safety seat according to the second embodiment in the folded position;

[0063] Figure 17 shows a top view of the child safety seat according to the second embodiment in the folded position;

[0064] Figure 18 shows a cross-sectional view of the child safety seat in Figure 14 in the unfolded position along section line III-III;

[0065] Figure 19 shows a cross-sectional view of the child safety seat in the folded position according to Figure 18;

[0066] Figure 20 is a perspective view of a child safety seat with a carrying handle, wherein the backrest is pivoted relative to the seat to the unfolded position;

[0067] Figures 21 to 23 show side views and enlarged sectional views of the backrest and seat in different unfolded positions, wherein Figure 21 shows the backrest pivoted relative to the seat in an upright position, Figure 22 shows the backrest pivoted relative to the seat in a moderately tilted position, and Figure 23 shows the backrest pivoted relative to the seat in a further tilted position.

[0068] Figure 24 is a perspective view of a child safety seat with a carrying handle, wherein the backrest is pivoted relative to the seat to a folded position.

[0069] Figure 25 shows the mounting block on the backrest where the handle is located;

[0070] Figure 26 is an exploded view of the mounting block for the handle and backrest shown in Figure 25;

[0071] Figures 27 to 29 show the handle being accommodated in the handle receiving slot when the backrest is pivoted to three different unfolded positions.

[0072] Figures 30 and 31 show a seat with a cup holder, wherein Figure 30 shows the cup holder in the storage position and Figure 31 shows a cup holder in the use position.

[0073] Figure 32 is a top view of the seat section shown in Figure 31 after the seat cover has been removed;

[0074] Figure 33 shows a perspective view of a cup according to one embodiment.

[0075] Figure 34 is a perspective view of a child safety seat equipped with a retaining mechanism, wherein the backrest is pivoted relative to the seat to the unfolded position;

[0076] Figure 35 is a perspective view of a child safety seat equipped with a retaining mechanism, wherein the backrest is pivoted relative to the seat to a folded position;

[0077] Figure 36 is an exploded view of the pivot point where the backrest and seat of the child safety seat shown in Figure 34 are connected.

[0078] Figure 37 is an exploded view of the backrest pivot structure and the retaining elastic member, in which a portion of the housing of the backrest pivot structure is removed.

[0079] Figure 38 is a view of the seat pivot structure and the retaining structure.

[0080] Figure 39 is a partial cross-sectional view showing the fit between the retaining elastic element and the retaining structure.

[0081] Figure 40 is a perspective view of the backrest of a child safety seat equipped with an operating mechanism.

[0082] Figure 41 is a rear view of the backrest shown in Figure 40, in which the headrest panel has been removed.

[0083] Figure 42 shows the structure of the operating mechanism and its positional relationship with the locking part.

[0084] Figures 43 to 45 are partial cross-sectional views of the backrest with an operating mechanism. Figure 43 shows the operating mechanism in the lowest position relative to the backrest. Figure 44 shows the operating mechanism in the state of pivoting between the backrest and the seat and allowing the headrest to move relative to the backrest. Figure 45 shows the operating mechanism in the state of the headrest relative to the backrest in a higher position.

[0085] Figure 46 is a partial view of the back part with a locking mechanism.

[0086] Figure 47 is a partial view of the seat section with a limiting member.

[0087] Figure 48 is a sectional view and a partial enlarged view of the connection between the backrest in Figure 46 and the seat in Figure 47.

[0088] Figures 49A to 49C show the positions of the locking part relative to the limiting member when the backrest and seat are in different unfolded positions. Figure 49A shows the backrest pivoting relative to the seat in an upright position, Figure 49B shows the backrest pivoting relative to the seat in a moderately tilted position, and Figure 49C shows the backrest pivoting relative to the seat in a maximum tilted position.

[0089] Figure 50 shows one embodiment of the limiting member.

[0090] Figures 51A and 51B show another embodiment of the limiting member.

[0091]

List of Reference Numerals

[0092] The present invention will now be described in detail with reference to the accompanying drawings.

[0093] Although the invention can easily have many different embodiments, several specific embodiments are shown in the accompanying drawings and will be described in detail herein. It should be understood that this specification should be regarded as an example of the principles of the invention and is not intended to limit the invention to the drawings shown herein.

[0094] Unless otherwise defined, the terms "first," "second," and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "an" or "a" and similar terms do not necessarily indicate a quantity limitation. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the element or object listed after the word and its equivalents, without excluding other elements or objects. In the embodiments shown in the drawings, directional representations such as up, down, left, right, front, and rear are not absolute but relative, used to explain the structure and movement of different components in the invention. These representations are appropriate when the components are in the positions shown in the figures. However, if the description of the component positions changes, then these representations are considered to change accordingly. In this disclosure, "forward" refers to the direction the front of the vehicle is pointing when the child safety seat is installed in the vehicle seat, i.e., the positive direction on the X-axis in the figures. "Rearward" refers to the direction opposite to "forward," i.e., the negative direction on the X-axis in the figures. The X-axis direction is also called the "front-rear direction." "Lateral" and "left-right" refer to directions orthogonal to the front-back direction, i.e., the Y-axis direction in the diagram. The Z-axis direction is a vertical direction perpendicular to the horizontal plane. "Outer side" refers to the side away from the child when the child is sitting in the child safety seat, and "inner side" refers to the side closer to the child when the child is sitting in the child safety seat.

[0095] One known foldable booster seat includes a backrest and a seat. A protruding connecting shaft is located on the upper surface of the seat, through which the backrest is pivotally connected. However, the folded size is still not compact enough and occupies a significant amount of space. Furthermore, the gap between the backrest and the connecting shaft is large, posing a risk of pinching a child. In another known foldable child safety seat, the tilt angle of the backrest relative to the seat cannot be adjusted when the seat is not folded. Additionally, in some child safety seats, when folded, the side panels on the backrest interfere with the upper surface of the seat or the armrests, resulting in a large gap between the front surface of the backrest and the upper surface of the seat after folding.

[0096] Figures 1 to 13 show a child safety seat 1 according to a first embodiment of this application.

[0097] Referring to Figure 1, the child safety seat 1 has a backrest 100 and a seat 200. The backrest 100 supports the child's back, and the seat 200 is for the child to sit on. A headrest 300 may be provided on the upper part of the backrest 100 along its length in the Z-axis direction, and side wings 120 are provided on both sides along the Y-axis direction for lateral protection of the child. A pivoting mechanism 130 is provided between the backrest 100 and the seat 200. The backrest 100 is connected to the seat 200 via the pivoting mechanism 130 and is pivotable relative to the seat 200 between an unfolded position (e.g., see Figure 1) and a folded position (e.g., see Figure 2). The unfolded position refers to the position where the backrest 100 is pivoted relative to the seat 200 to a position suitable for a child to sit in. For example, the angle between the backrest 100 and the seat 200 is approximately 90 degrees, as shown in the upright position in Figure 10 or Figure 21; or the angle between the backrest 100 and the seat 200 is slightly more than 90 degrees, as shown in the moderately reclined position in Figure 12 or 22; or the angle between the backrest 100 and the seat 200 is significantly more than 90 degrees, as shown in the further reclined position in Figure 23. Therefore, there can be multiple unfolded positions to meet the different needs of children. The folded position refers to the position where the backrest 100 pivots towards the seat 200 until the two are close together and can no longer pivot towards each other, as shown in Figure 2, to reduce the space occupied by the child safety seat 1. The backrest 100 includes a first backrest 100A and a second backrest 100B. In this embodiment, the second backrest portion 100B and the first backrest portion 100A are integral parts. The first backrest portion 100A is pivotally connected to the seat portion 200 via a pivoting mechanism 130, and the second backrest portion 100B is located above the first backrest portion 100A. In other embodiments, the second backrest portion 100B and the first backrest portion 100A may also be separate parts. For example, the second backrest portion 100B may be slidably disposed on the first backrest portion 100A, thereby allowing adjustment of the backrest length to accommodate children of different ages (not shown).

[0098] As shown in Figure 1, side wings 120 are provided on the left and right sides of the second backrest portion 100B. The portion of the backrest portion 100 located between the side wings 120 is the second backrest portion 100B, and the portion extending downwards from the second backrest portion 100B to the lower end of the backrest portion 100 is the first backrest portion 100A. Optionally, a positioning portion 122 is provided at the lower end of the side wings 120 to restrict movement between the backrest portion 100 and the seat portion 200 when the backrest portion 100 is in the folded position. In this embodiment, the positioning part 122 is a receiving recess provided on the inner side surface of the side wing part 120. The wall thickness of the side wing part 120 at the receiving recess is relatively thin. The distance between the receiving recess surface of the left side wing part 120 and the receiving recess surface of the right side wing part 120 is greater than the average distance between the inner sides of the left and right side wing parts 120, so that when the backrest part 100 is in the folded position, a portion of the seat part 200 can be accommodated in the receiving recess, that is, a pair of receiving recesses clamp the seat part 200 from the left and right directions, thereby reducing the lateral swaying of the backrest part 100 relative to the seat part 200 and improving the stability of the child safety seat 1 when folded. The width of the portion of the seat part 200 that is accommodated in the pair of receiving recesses is less than the distance between the surfaces of the pair of receiving recesses, but greater than the average distance between the inner sides of the left and right side wing parts 120. In other embodiments, the positioning part 122 can also be a fastening mechanism such as a hook or Velcro. When the backrest 100 is in the folded position, the positioning part 122 engages with the seat 200, thereby restricting the pivoting movement between the backrest 100 and the seat 200 to prevent the backrest 100 from pivoting from the folded position to the unfolded position. In still some embodiments, Velcro or other hooks can be provided on the surface of the receiving recess shown in FIG1 to simultaneously restrict the lateral movement and pivoting movement of the backrest 100.

[0099] The seat 200 includes a seat body 210 and an armrest 150 protruding from the upper surface of the seat body 210. The seat body 210 carries a child through its upper surface, and the upper surface of the armrest 150 is used to support the child's hands. A U-shaped groove is provided below for the vehicle seat belt to pass through, so that the child and the child safety seat 1 can be secured together to the vehicle seat using the vehicle seat belt.

[0100] Referring to Figure 1, when the backrest 100 is in the unfolded position, the backrest 100 and the upper surface of the seat 200 form an inclination angle of 90 to 110 degrees, ensuring that the child can sit comfortably and safely. The side wings 120 are located on the left and right sides of the child, and the distance between the left and right side wings 120 gradually increases from back to front. Referring further to Figure 2, when the backrest 100 is in the folded position, the backrest 100 pivots towards the upper surface of the seat 200, so that the backrest 100 and the seat 200 are closely or nearly closely fitted. At this time, a portion of the front end of the seat body 210 is located between the pair of side wings 120, and the first backrest 100A is located between the pair of armrests 150. The side wings 120 do not interfere with the seat body 210 and the armrests 150, thereby making the backrest 100 and the seat 200 more compact, thus reducing the overall thickness of the child safety seat 1 after folding and saving storage space. In addition, since a pair of side wings 120 are located on both sides of the seat body 210 and a pair of armrests 150 are located on both sides of the first backrest 100A, the lateral movement of the backrest 100 relative to the seat 200 is restricted, which improves the stability in the stowed state.

[0101] Optionally, referring to Figure 1, a locking mechanism 140 may be provided between the backrest 100 and the seat 200. The rear end of the seat 200 engages with the lower end of the backrest 100, and the locking mechanism 140 can position the backrest 100 in one or more tilted unfolded positions to accommodate different sitting postures of children.

[0102] According to this embodiment, as shown in FIG1, the seat portion 200 has pivot portions 220 on both the left and right sides for pivotally connecting to the backrest portion 100. The pivot portions 220 are provided on the armrest portion 150, which is configured to protrude upward along the Z-axis direction from both sides of the seat body 210 of the seat portion 200. Corresponding to the pivot portions 220, the backrest portion 100 has a pivot mechanism 130 at its lower part along the length direction of the Z-axis. The pivot mechanism 130 is, for example, configured as a triangular pivot lug, extending forward along the X-axis direction from the backrest body 110 of the backrest portion 100.

[0103] To facilitate the placement and pivoting of the pivoting mechanism 130, as shown in Figure 1, two pivoting portions 220 are respectively provided with recesses 221 on their facing sides along the X-axis. The recesses 221 are configured to open upwards along the Z-axis, and their shape and size are adapted to the shape and size of the pivoting mechanism 130. Referring to Figure 3, the pivoting mechanism 130 is an acute-angled triangle with a first side 135 and a second side 136. The lower side of the recess 221 along the Z-axis forms an obtuse angle and constitutes the pivoting boundary of the pivoting mechanism 130. The lower side includes a first wall portion 223 and a second wall portion 224. The pivoting mechanism 130 can pivot about the pivot axis formed by the pivot member 132. In Figure 3, the backrest 100 can pivot to be substantially parallel to the seat 200 via a pivot mechanism 130. The first side 135 of the pivot mechanism 130 is close to the first wall 223 of the recess 221, and the second side 136 is away from the second wall 224, thereby making the folded child safety seat 1 more compact. In the folded position, referring to Figures 2 and 6, the side wings 120 of the backrest 100 are offset from the seat body 210 and armrest 150 of the seat 200, and the headrest 300 of the backrest 100 is offset from the seat body 210 of the seat 200 to avoid interference between components. For example, the headrest 300 is generally located in front of the seat 200, the opening width between the two side wings 120 gradually increases to avoid the seat 200, and the pivot 220 of the seat 200 is located behind the side wings 120 along the X-axis. As can also be seen from Figure 6, there is a gap 310 between the headrest 300 and the seat 200, a gap 121 between the side wing 120 and the seat 200, and the armrest 150 with the pivot 220 is spaced apart from the side wing 120 along the X-axis.

[0104] The pivot mechanism 130 is provided with a pivot hole 131. A pivot member 132, such as a bolt, can pass through the pivot hole 131 and engage with a connecting hole 222 provided in the recess 221, thereby combining the backrest 100 and the seat 200 into a foldable child safety seat 1. Using the pivot member 132 as a pivot axis, the backrest 100 can be folded from the unfolded position shown in FIG1 to the folded position shown in FIG2, and vice versa.

[0105] Referring to Figures 1, 2, 4, 5, and 7, the lower end of the backrest 100, below the pivot 132 along the Z-axis, is inserted into the rearward end of the seat 200 along the X-axis. This lower end has a locking mechanism 140 located at the junction of the backrest 100 and the seat 200, locking them relative to each other in the unfolded position. The lower end of the first backrest 100A has a protruding mounting block 142, and the rear of the seat 200 has a recessed mounting groove 211. Referring to Figure 7, when the backrest 100 is in the unfolded position, the mounting block 142 is inserted into the mounting groove 211, allowing the locking part 141 (described later) to engage with the locking part 213 (described later). Referring to Figure 3, when the locking mechanism 140 is unlocked, the backrest 100 pivots from the unfolded position to the folded position, and the mounting block 142 disengages from the mounting groove 211 and is exposed outside the seat 200. Optionally, the mounting block 142 may also be provided with a handle (described below) for carrying the folded child safety seat 1. For example, the handle may be a groove provided on the front surface of the mounting groove 211. When the backrest 100 is in the unfolded position, the handle is hidden inside the mounting groove 211 for a more aesthetically pleasing appearance. When the backrest 100 is in the folded position, the handle is exposed between the backrest 100 and the seat 200 for easy carrying by the user.

[0106] Optionally, as shown in FIG9, a protruding guide rib 217 is formed in the mounting groove 211. The top of the guide rib 217 is an arc surface. The mounting block 142 has a dividing groove 1424 in the middle of the transverse direction. The dividing groove 1424 sets the mounting block 142 into two segments separated in the Y-axis direction. When the backrest 100 pivots from the folded position to the unfolded position, the guide rib 217 cooperates with the dividing groove 1424 to guide the mounting block 142 into the mounting groove 211 of the seat 200 (see FIG4 and FIG5). In some embodiments, when the backrest 100 is in the unfolded position with the largest tilt angle, the surface of the mounting block 142 abuts against the inner sidewall of the mounting groove 211 to prevent the backrest 100 from pivoting excessively away from the seat 200.

[0107] The locking mechanism 140 can be integrally formed with the backing portion 100 as shown in FIG2. The mounting block 142 of the locking mechanism 140 extends rearward from the backing portion 100 along the X-axis direction. As shown in the locking mechanism 140 on the right side of FIG2, the mounting block 142 includes a receiving groove 1421 extending along the Y-axis direction. One end of the receiving groove 1421 has an opening 1423 and the other end is closed. The receiving groove 1421 has a window 1422 in the Z-axis direction.

[0108] Referring to the locking mechanism 140 on the left side of Figure 2, the locking mechanism 140 includes a locking part 141, which can be in the form of a locking lever. In the folded position shown in Figure 2, the insertion end 1411 of the locking part 141 protrudes from the opening 1423. According to this disclosure, the main cross-section of the insertion end 1411 is circular, but it can also be other shapes. The locking part 141 also includes a release operation part 143, which protrudes from the window 1422 and is located on one side of the window 1422, thereby forming a notch 144 in the window 1422. The user can insert their finger into the notch 144 and press the release operation part 143, thereby causing the locking part 141 to slide along the receiving groove 1421 until the insertion end 1411 of the locking part 141 retracts into the mounting block 142.

[0109] Referring to Figure 5, a locking portion 213 is provided on the sidewall 2111 extending along the X-axis of the mounting groove 211 for inserting the insertion end 1411 of the locking portion 141 in Figure 2. The locking portion 213 is a long strip-shaped recess 213, with both ends of the recess 213 adapted to be circular for the locking portion 141. The locking portion 213 includes a limiting portion 214 in the middle, which divides the locking portion 213 into multiple locking slots, for example, the multiple locking slots can be a first recess 215 and a second recess 216. The limiting portion 214 is, for example, a protrusion, with its two sides forming two envelope circles together with the first recess 215 and the second recess 216, such that the cross-sectional diameter of the two envelope circles is substantially equal to the diameter of the insertion end 1411 of the locking portion 141. In Figure 5, the locking part 213 is inclined at an angle relative to the horizontal plane of the seat part 200. The centers of the envelope circles of the first recess 215 and the second recess 216 are respectively located on the envelope circle with the engagement hole 222 as the center and the radius r, so that the backrest part 100 can be locked relative to the seat part 200 at different adjustment angle positions (see the description of Figures 10 to 13 below).

[0110] According to this disclosure, more than two recesses may be provided to offer more adjustment angles for the backrest 100, or only one recess may be provided.

[0111] A guide groove 212 is provided in the seat body 210, extending from the outer surface of the seat body 210, for example, at the end corner in FIG. 5, to the locking part 213. The guide groove 212 and the locking part 213 together form an insertion channel for the insertion end 1411, and a barrier part 2121 is formed between the guide groove 212 and the locking part 213. According to this disclosure, the guide groove 212 has a slope, and a corresponding slope is provided on the insertion end 1411 of the locking part 141 into the locking part 213 (see FIG. 8 and 9). That is, the insertion end 1411 of the locking part 141 forms a guide slope, and the seat part 200 forms a guide groove 212 corresponding to the guide slope. The guide slope facilitates the locking part 141 sliding into the guide groove 212.

[0112] As shown in Figures 7 and 8, the locking mechanism 140 provided on the backrest 100 is inserted into the mounting groove 211 in the seat 200 and locked. In this case, the release operation part 143 of the locking part 141, marked with an exemplary arrow, is exposed from the window 1422 of the mounting block 142 of the locking mechanism 140. To release the lock, the user can insert a finger into the notch 144 and press the release operation part 143 in the direction of the arrow, causing the locking part 141 to move in the direction of the arrow, ultimately causing the insertion end 1411 to disengage from the locking part 213, thereby disengaging the backrest 100 from the seat 200 and pivoting and folding it relative to the seat 200. As shown in the cross-sectional view of Figure 8, a receiving groove 148 is provided in the receiving end 1412 of the locking part 141 opposite to the insertion end 1411 for receiving a reset member 149 in the form of a compression spring. One end of the compression spring abuts against the bottom of the receiving groove 148, and the other end abuts against the mounting block 142. The reset member 149 keeps the insertion end 1411 of the locking part 141 protruding from the mounting block 142 to prevent the insertion end 1411 from retracting into the mounting block 142.

[0113] When the child safety seat 1 is switched from the unfolded position to the folded position, the release operation part 143 can be pressed to overcome the force of the reset member 149, causing the insertion end 1411 of the locking part 141 to retract into the mounting block 142. At this time, when the backrest 100 is pivoted relative to the seat 200, the insertion end 1411 of the locking part 141 can pass over the barrier part 2121 (see FIG. 5) between the guide groove 212 and the locking part 213, move from the locking part 213 to the guide groove 212, and then move out of the seat 200 along the guide groove 212, realizing the folded position of the backrest 100 and the seat 200.

[0114] Referring to Figures 8 and 9, the locking mechanism 140 also has a limiting pin 145. The limiting pin 145 passes through the mounting block 142 and is inserted into the limiting groove 146 provided in the locking part 141. The limiting groove 146 extends along the moving direction of the locking part 141, that is, along the Y-axis direction. By inserting the limiting pin 145 into the limiting groove 145, the stroke of the locking part 141 and the unlocking operation part 143 is limited, so as to ensure the stability and reliability of the reciprocating motion of the locking part 141.

[0115] In other words, the locking part 141 has a limiting groove 146 extending in its length direction, and the backing part 100 has a limiting pin 145, which passes through the limiting groove 146 to limit the extension and retraction stroke of the locking part 141. When the locking part 141 extends into the first recess 215, at least a portion of the limiting groove 146 is located in the recess 213, so that the limiting pin 145 can be positioned from the first recess 215 to the second recess 216 by deforming into the receiving groove 1421 when it abuts against the limiting part 214.

[0116] The locking part 141 may also include a protrusion 147, the height of which along the Z-axis is greater than that of the insertion end 1411, so that it can abut against the side wall 2111 of the mounting groove 211 in the insertion state shown in FIG8, thereby preventing the insertion end 1411 of the locking part 141 from touching the side wall 2111 under the action of the reset member 149.

[0117] When the backrest 100 and seat 200 are combined into the unfolded position, the backrest 100 pivots upward relative to the seat 200 via the pivoting mechanism 130. The insertion end 1411 of the locking part 141 first enters the guide groove 212. The sloped insertion end 1411 and the guide groove 212, which has the same slope, complement each other. The insertion end 1411 slides along the ramp across the guide groove 212, and after passing the barrier part 2121 of the guide groove 212, it falls into the locking part 213 and locks, thus realizing the unfolded position. The movement of the insertion end 1411 in the locking part 213 will be described in detail later with reference to Figures 10 to 13.

[0118] Figures 10 to 13 exemplarily illustrate two angular positions of the child safety seat 1 in the unfolded position.

[0119] Figures 10 and 11 show the first angular position, where the backrest 100 is substantially perpendicular to the seat 200. Figure 11 is a cross-sectional view of Figure 10, showing the child safety seat 1 cut along the Z-axis from, for example, the position of the limiting groove 146 in Figure 8. In this case, the insertion end 1411 of the locking part 141 is located in the first recess 215. Relative to the folded position of Figure 3, the first side 135 of the pivoting mechanism 130 is away from the first wall portion 223 of the recess 221 in Figure 11, while the second side 136 is close to the second wall portion 224 and still has pivoting space to achieve the second angular position.

[0120] Figures 12 and 13 show the second angular position, where the backrest 100 and the seat 200 form an obtuse angle. In this case, the insertion end 1411 of the locking part 141 overcomes the obstruction of the limiting part 214 by, for example, by the user swinging the backrest 100, moves into the second recess 216 and locks. Compared to Figure 11, the second side 136 of the pivoting mechanism 130 is almost against the second wall 224 in Figure 13, thereby reaching the limit pivoting position.

[0121] Figures 14 to 19 illustrate a child safety seat 1 according to a second embodiment of this application. For the sake of brevity, only the differences from the first embodiment will be described in detail.

[0122] According to this embodiment, at a position near the junction of the seat portion 200 and the backrest portion 100, a pivot portion 220 is provided on each side of the seat portion 200 along the Y-axis direction. The pivot portion 220 is, for example, configured as a triangular pivot lug, and a connecting hole 222 is provided at the upper end of the pivot lug. The pivot portion 220 also has a recess 221, which is formed on the two outer surfaces of the seat portion 200 along the Y-axis direction and has an arc-shaped bottom wall 225.

[0123] The backrest portion 100 correspondingly has a pivot mechanism 130, which has a pivot hole 131 for pivoting the seat portion 200. The pivot mechanism 130 is configured to extend downward along the Z-axis direction from below the armrest portion 150, and its lower arcuate portion 133 near the bottom wall 225 is received in a recess 221, corresponding to the arcuate shape of the bottom wall 225, so that the recess 221 does not interfere with the pivoting of the pivot mechanism 130. According to this embodiment, the inner surface of the pivot member 132 of the pivot portion 220 can be flush with the inner surface of the side wing portion 120.

[0124] Referring to Figures 16 and 17, since the armrest 150 is integrated into the side wing 120 of the backrest 100, the child safety seat 1 is more streamlined when folded. The side wing 120 can be integrally molded into multiple structural components, thereby reducing the number of independent parts and simplifying manufacturing. According to the second embodiment, the structure of the locking mechanism 140 is basically the same as that in the first embodiment, and will not be described again.

[0125] Figure 18 shows a cross-sectional view along section line III-III in Figure 14, and Figure 19 is a view of the backrest 100 in Figure 18 after it has been folded.

[0126] In the unfolded position shown in Figure 18, the first wall portion 223 of the pivot portion 220 is away from the first side 135 of the pivot mechanism 130, and the second wall portion 224 is close to the second side 136 of the pivot mechanism 130. In the folded position shown in Figure 19, the first wall portion 223 of the pivot portion 220 is close to the first side 135 of the pivot mechanism 130, and the second wall portion 224 is away from the second side 136 of the pivot mechanism 130. Therefore, the pivot portion 220 can pivot within the range defined by the first side 135 and the second side 136 of the pivot mechanism 130, thereby preventing the backrest portion 200 from overturning.

[0127] According to this disclosure, a pivoting mechanism 130 may be disposed between the backrest portion 100 and the seat portion 200 to allow the backrest portion 100 to rotate relative to the seat portion 200 between an unfolded position and a folded position. A locking mechanism 140 may be disposed between the backrest portion 100 and the seat portion 200 and spaced apart from the pivoting mechanism 130. The locking mechanism 140 is operable to lock the rotation between the backrest portion 100 and the seat portion 200. When the locking mechanism 140 locks the backrest portion 100 and the seat portion 200, the backrest portion 100 is allowed to be positioned in one of a plurality of unfolded positions, and when the locking mechanism 140 releases the lock between the backrest portion 100 and the seat portion 200, the backrest portion 100 is allowed to pivot to a folded position.

[0128] The backrest 100 and seat 200 form a seesaw-like structure via a pivoting mechanism 130. The seat 200 forms the base of the seesaw, and the pivoting part 220 of the seat 200 forms a pivot support on the base and supports the pivoting mechanism 130 on the backrest 100, allowing the backrest 100 to pivot back and forth between the unfolded position and the folded position. This achieves a simple foldable child safety seat 1, and the user can change the state of the child safety seat 1 with minimal force.

[0129] By providing a pivoting mechanism 130 between the backrest 100 and the seat 200, a simple pivotal connection between the two is achieved, thus effectively enabling the backrest 100 and seat 200 to be folded and stored, improving the user experience. Furthermore, this application also includes a locking mechanism 130 to lock the backrest 100 and seat 200 in the unfolded position, ensuring reliability and safety during seating. The mechanism according to this disclosure is not only simple in structure and easy to manufacture and assemble, but also provides reliable and stable locking and unlocking.

[0130] Figures 20 to 23 illustrate another embodiment of the pivotal connection between the backrest 100 and the seat 200. The backrest 100 has a backrest pivot structure 160 at its lower part, and the seat 200 has seat pivot structures 230 on both sides laterally. A pivot shaft 240 passes through and connects the backrest pivot structure 160 and the seat pivot structure 230, thereby pivoting the backrest 100 to the seat 200.

[0131] In this embodiment, as shown in Figures 21 to 23, the recess 213 may be provided with multiple locking slots, so that the locking part 141 can be inserted into different locking slots to lock the backing part 100 in different unfolded positions.

[0132] For example, as shown in Figures 21 to 23, the locking part 213 includes two pairs of protruding limiting parts 214, which divide the locking part 213 into three locking slots, which are separated by the limiting parts 214. When the locking part 141 is inserted into the locking part 213, it can deform by being pressed against the limiting parts 214, thereby moving between the three locking slots.

[0133] As shown in Figure 21, when the backrest 100 pivots to the upright position relative to the seat 200, the locking part 141 is inserted into the upper right locking groove in Figure 21 and locked in the locking groove by the limiting part 214, thereby locking the backrest 100 relative to the seat 200 in the upright position.

[0134] As shown in Figure 22, when the backrest 100 pivots relative to the seat 200 to a moderately tilted position, the locking part 141 moves from the upper right locking groove to the middle locking groove and is locked in the locking groove by the limiting part 214, thereby locking the backrest 100 relative to the seat 200 at a moderately tilted position.

[0135] As shown in Figure 23, when the backrest 100 pivots relative to the seat 200 to a further tilted position, the locking part 141 moves from the middle locking groove to the lower right corner locking groove and is locked in the locking groove by the limiting part 214, thereby locking the backrest 100 relative to the seat 200 at the further tilted position.

[0136] As shown in Figures 21 to 23, the lateral area of ​​the seat pivot structure 230 is larger than the lateral area of ​​the backrest pivot structure 160, so that a seat belt guide channel 250 for the vehicle seat belt (not shown) to pass through is formed between the lower front edge 170 of the backrest 100 and the front edge 231 of the seat pivot structure 230.

[0137] Furthermore, as shown in Figures 21 to 23, when the backrest 100 is locked in different unfolded positions, the position of the lower front edge 170 of the backrest 100 relative to the front edge 231 of the seat pivot structure 230 changes, causing the size of the seat belt guide channel 250 to change.

[0138] For example, as shown in Figure 21, when the backrest 100 pivots relative to the seat 200 to an upright position, the lower front edge 170 of the backrest 100 is closer to the front edge 231 of the seat pivot structure 230, which makes the lateral area of ​​the seat belt guide channel 250 smaller. As a result, the range of motion of the seat belt (not shown) within the seat belt guide channel 250 is smaller or it is clamped, which makes the child securely fixed by the seat belt when the backrest 100 is in an upright position.

[0139] As shown in Figures 22 and 23, when the backrest 100 is pivoted relative to the seat 200 to a moderately tilted or further tilted position, the lower front edge 170 of the backrest 100 is positioned further away from the front edge 231 of the seat pivot structure 230, resulting in a larger lateral area of ​​the seat belt guide channel 250. Consequently, the seat belt (not shown) has a greater range of motion within the seat belt guide channel 250 and will not be trapped. This allows children a certain degree of freedom when the backrest 100 is in a moderately tilted or further tilted position, making the ride more comfortable.

[0140] To facilitate the handling of the folded child safety seat 1, as shown in Figures 20 and 24, a handle 400 is provided at the lower end of the backrest 100. The handle 400 is arranged such that when the backrest 100 is pivoted relative to the seat 200 to the folded position, the handle 400 protrudes between the backrest 100 and the seat 200 (see Figure 24), allowing the user to grasp the handle 400 through the space between the backrest 100 and the seat 200, thereby lifting the folded child safety seat 1 with the help of the handle 400.

[0141] As shown in Figures 25 and 26, when a mounting block 142 is provided at the lower end of the backrest 100, the handle 400 can be provided on the mounting block 142.

[0142] The handle 400 can also be formed as a single component and connected to the lower end of the backrest 100 or the mounting block 142. For example, as shown in FIG26, the handle 400 can be a U-shaped handle piece, which is fixed to the mounting block 142 by means of fasteners such as screws or rivets.

[0143] As previously described, when the backrest 100 is in the unfolded position, the mounting block 142 of the backrest 100 is inserted into the mounting groove 211 of the seat 200. In this case, to avoid interference between the handle 400 provided on the mounting block 142 and the mounting groove 211, as shown in FIG24, a handle receiving groove 2112 is provided in the mounting groove 211. This groove is configured such that, during the process of the backrest 100 pivoting relative to the seat 200 to the unfolded position, the handle receiving groove 2112 can accommodate and avoid the handle 400. Moreover, since the handle receiving groove 2112 can accommodate the handle 400, when the backrest 100 is in the unfolded position, the handle 400 is hidden in the handle receiving groove 2112, thereby making the child safety seat 1 more aesthetically pleasing. As shown in FIG24, when the backrest 100 is in the folded position, the handle 400 disengages from the handle receiving groove 2112 and is exposed outside the seat 200 for the user to grip. Optionally, a handle 400 is mounted protrudingly on the front of the mounting block 142 (i.e., on the side near the support surface of the backrest 100), and when the backrest 100 is in the folded position, the handle 400 is located between the backrest 100 and the seat 200 for easy gripping by the user.

[0144] Figures 27 to 29 show the handle 400 being accommodated in the handle receiving slot 2112 when the backrest 100 is pivoted to three different unfolded positions.

[0145] As shown in Figure 27, when the backrest 100 is pivoted to the upright position, the handle 400 is not only accommodated in the handle receiving groove 2112, but the distance between the handle 400 and the inner wall 2113 of the handle receiving groove 2112 is also relatively large, so that the backrest 100 can pivot to a relatively inclined unfolded position.

[0146] As shown in Figure 28, when the backrest 100 is pivoted to a moderately tilted position, the handle 400 is still accommodated in the handle receiving groove 2112, but the handle 400 moves with the backrest 100 to a position close to the inner wall 2113 of the handle receiving groove 2112. At this time, since there is still a certain distance between the handle 400 and the inner wall 2113 of the handle receiving groove 2112, the backrest 100 can pivot to a more tilted unfolded position.

[0147] As shown in Figure 29, when the backrest 100 pivots to a further tilted position, the handle 400 is still accommodated in the handle receiving groove 2112, but the handle 400 moves with the backrest 100 to approach the inner wall 2113 of the handle receiving groove 2112.

[0148] In the event of a traffic accident, if the backrest 100 is compressed and continues to pivot in a more inclined direction than designed (i.e., away from the seat 200), the handle 400 will abut against the inner wall 2113 of the handle receiving groove 2112, preventing the backrest 100 from pivoting further. Therefore, the inner wall 2113 of the handle receiving groove 2112 constitutes a blocking structure that prevents the backrest 100 from pivoting from the unfolded position away from the seat 200.

[0149] Of course, the blocking structure according to this disclosure is not limited to this. The handle receiving groove 2112 may be provided with other forms of blocking structure 2113. For example, the blocking structure 2113 may also be a blocking protrusion provided in the handle receiving groove 2112 to block the handle 400 or a hook that can hook the handle 400.

[0150] To increase the convenience of the child safety seat 1, as shown in Figures 30 and 31, the seat portion 200 may be provided with a cup 500 for placing items such as cups. The cup 500 is slidably disposed on the seat portion 200 via a sliding mechanism 600, so that the cup 500 has a usage position extending out of the seat portion 200 (see Figure 31) and a storage position retracted into the seat portion 200 (see Figure 30).

[0151] The sliding mechanism 600 may include a limiting groove 610 formed in the seat portion 200 and a fastener 620 connected to the cup 500. The fastener 620 may slide along the limiting groove 610 to allow the cup 500 to slide relative to the seat portion 200.

[0152] It should be understood that the limiting groove 610 can also be formed on the cup 500. Correspondingly, the fastener 620 is connected to the seat part 200.

[0153] Fastener 620 can be a component of various forms such as screws or rivets, as long as it can be connected to cup 500 and engaged in retaining groove 610 without disengaging from retaining groove 610.

[0154] As shown in Figures 30 and 31, a limiting groove 610 is formed in the upper cover 201 of the seat portion 200. In this embodiment, the cup 500 can be retracted into the interior of the seat portion 200, which is composed of the upper cover 201 and the lower cover 202 (see Figure 32), when in the storage position.

[0155] In other embodiments, the limiting groove 610 may be formed on the lower cover 202 of the seat portion 200.

[0156] In order to limit the sliding stroke of the cup 500 so that the cup 500 can be held in, for example, a use position or a storage position, a limiting structure 611 is provided in the limiting groove 610, which can hold the fastener 620 connected to the cup 500 in at least one position of the limiting groove 610, thereby holding the cup 500 in the desired position.

[0157] As shown in Figures 30 and 31, the limiting structure 611 consists of limiting protrusions 611 located near the two ends of the limiting groove 610. Because the limiting protrusions 611 reduce the width of the limiting groove 610, the fastener 620 is blocked by the limiting protrusions 611 when passing through the portion of the limiting groove 610 where the limiting protrusions 611 are located, thus maintaining the fastener 620 and the connected cup 500 in that position. When the user applies a large force to the cup 500, the fastener 620 connected to the cup 500 can then push aside the limiting protrusions 611 and slide through the portion of the limiting groove 610 where the limiting protrusions 611 are located. This design allows the cup 500 to remain in its usage position, storage position, or other desired position when not subjected to significant external force, preventing the cup 500 from accidentally sliding to an unsuitable position.

[0158] It should be understood that the limiting structure 611 according to this disclosure is not limited to a limiting protrusion, and other structures can be adopted. For example, the limiting structure 611 can be one or more transverse grooves (not shown) communicating with the limiting groove 610, wherein the extending direction of the transverse groove is perpendicular to the extending direction of the limiting groove 610. In one embodiment, the transverse groove is located at the end of the limiting groove 610. When the fastener 620 connected to the cup 500 slides to the end of the limiting groove 610 and enters the transverse groove, the fastener 620 and the cup 500 connected thereto can remain at the end of the limiting groove 610.

[0159] The cup 500 can be placed at the two front corners of the seat 200, as shown in Figures 32 and 33, or it can be placed on the left and right sides of the seat 200.

[0160] To make the sliding of the cup 500 smoother, as shown in Figure 32, a track rib 203 is formed on the lower cover 202 of the seat portion 200, and the bottom surface of the cup 500 abuts against the track rib 203.

[0161] Figure 34 shows a cup 500 according to the present disclosure, wherein the cup 500 is provided with a cup receiving groove 510 for placing cups and other items and a cup protrusion 520 for connecting fasteners 620 (see Figure 32).

[0162] In other embodiments, the cup 500 may not have the aforementioned cup protrusion 520, and the fastener 620 may be connected to the body of the cup 500.

[0163] Some child car seats have backrests that don't fit snugly together with the seat after pivoting to the folding position, or the folded seat unfolds to some extent when lifted, making it inconvenient for users to carry. To address this, a folding locking device can be installed between the backrest and the seat. However, when the child car seat is unfolded, the user must first release the folding locking device, which affects the user experience. Furthermore, the complex structure of the folding locking device not only hinders production and assembly but also increases overall production costs.

[0164] The child safety seat 1 according to this disclosure provides a retaining mechanism that can be applied to the child safety seat of any of the above embodiments. The retaining mechanism is disposed between the backrest portion 100 and the seat portion 200. The retaining mechanism is configured such that when the backrest portion 100 is pivoted relative to the seat portion 200 to a folded position, the retaining mechanism elastically holds the backrest portion 100 and the seat portion 200 in the folded position.

[0165] In this disclosure, "elastically held" means that the holding mechanism can provide a holding elastic force to hold the backrest 100 and the seat 200 in a folded position. When the force causing the backrest 100 to disengage from the folded position relative to the seat 200 is less than this holding elastic force, the backrest 100 and the seat 200 will remain in the folded position. When the force causing the backrest 100 to disengage from the folded position relative to the seat 200 is greater than this holding elastic force, the backrest 100 and the seat 200 disengage from the folded position, allowing the backrest 100 to pivot relative to the seat 200 toward an unfolded position.

[0166] The retaining mechanism according to this disclosure has the effect that, when the backrest 100 is pivoted relative to the seat 200 to the folded position, the retaining elastic force provided by the retaining mechanism can elastically hold the backrest 100 and the seat 200 in the folded position to prevent them from accidentally moving away from each other. When the user needs to unfold the child safety seat 1, he only needs to apply a slight force to the backrest 100 and / or the seat 200, which is sufficient to overcome the retaining elastic force provided by the retaining mechanism to disengage the backrest 100 and the seat 200 from the folded position.

[0167] Figures 34 to 39 illustrate one embodiment of the retaining mechanism according to the present disclosure, wherein the retaining mechanism is disposed at a position where the backrest portion 100 and the seat portion 200 are pivotally connected.

[0168] As shown in Figure 34, the backrest 100 is provided with a backrest pivot structure 160, and the seat 200 is provided with a seat pivot structure 230. A pivot shaft 240 passes through and connects the backrest pivot structure 160 and the seat pivot structure 230, so that the backrest 100 is pivotally connected to the seat 200. In this case, the retaining mechanism can be provided at the position where the backrest pivot structure 160 and the seat pivot structure 230 are pivotally connected.

[0169] Of course, this disclosure is not limited thereto. In other embodiments where the backrest 100 and the seat 200 are pivotally connected by other structures, the retaining mechanism may be provided in other structures. Alternatively, the retaining mechanism may not be provided at the pivotal position between the backrest 100 and the seat 200, but at another position where the backrest 100 and the seat 200 are in close contact. For example, the retaining mechanism may be provided between the positioning portion (i.e., the receiving recess) 122 of the aforementioned side wing 120 and the seat 200 it holds.

[0170] As shown in Figure 35, the retaining mechanism includes a retaining elastic element 180 and a retaining structure 260.

[0171] The retaining elastic member 180 can be provided in one of the backrest portion 100 and the seat portion 200, and the retaining structure 260 can be provided in the other of the backrest portion 100 and the seat portion 200. The retaining elastic member 180 is configured to engage or disengage with the retaining structure 260 after elastic deformation.

[0172] When the backrest 100 is provided with a backrest pivot structure 160, the seat 200 is provided with a seat pivot structure 230, and the backrest 100 is pivotally connected to the seat 200 via the backrest pivot structure 160 and the seat pivot structure 230, the elastic member 180 is provided in one of the backrest pivot structure 160 and the seat pivot structure 230, and the recess 260 is provided in the other of the backrest pivot structure 160 and the seat pivot structure 230.

[0173] Figures 36 to 39 illustrate one embodiment of retaining elastic element 180 and retaining structure 260.

[0174] As shown in Figure 37, the retaining elastic member 180 is installed inside the backrest pivot structure 160, and includes a spring plate 182 and an elastic member protrusion 181 provided on the spring plate 182. The spring plate 182 is fixed to the backrest pivot structure 160 by a retaining pin. At a position corresponding to the elastic member protrusion 181, the backrest pivot structure 160 is formed through an exposure hole 161, through which the elastic member protrusion 181 is exposed on the outside of the backrest pivot structure 160 (see Figure 36).

[0175] The elastic protrusion 181 can move by means of the elastic deformation of the spring sheet 182.

[0176] As shown in Figure 38, the retaining structure 260 is a retaining hole provided in the pivoting structure 230 of the seat portion. The retaining hole 260 can be a through hole or a blind hole, as long as it can receive the elastic member protrusion 181.

[0177] When the backrest 100 is pivoted relative to the seat 200 to the folded position, the elastic protrusion 181 exposed on the outside of the backrest pivot structure 160 can be inserted into the retaining hole 260, as shown in FIG39. The retaining elastic member 180 engages with the retaining structure (i.e., the retaining hole) 260, so that the backrest 100 and the seat 200 are elastically held in the folded position.

[0178] As shown in Figure 39, the elastic protrusion 181 has a spherical surface, and the edge of the retaining hole 260 has a rounded structure. Therefore, when the backrest 100 and / or the seat 200 are moved away from each other by a sufficiently large force applied by the user, the spherical surface of the elastic protrusion 181 interacts with the rounded structure at the edge of the retaining hole 260, causing the elastic protrusion 181 to move out of the retaining hole 260 under the pressure of the rounded structure. That is, the retaining elastic member 180 disengages from the retaining structure (i.e., the retaining hole) 260 after elastic deformation, allowing the backrest 100 and the seat 200 to disengage from the folded position.

[0179] To facilitate user operation, the child safety seat 1 according to this disclosure may employ an operating mechanism 700 to release the pivot between the backrest 100 and the seat 200 and to adjust the extension length of the backrest 100.

[0180] The backrest portion 100 also includes a first backrest assembly 110 and a second backrest assembly 320. The first backrest assembly 110 is pivotally connected to the seat portion 200, and the second backrest assembly 320 is slidably connected to the first backrest assembly 110 and can extend relative to the first backrest assembly 110 away from the seat portion 200. That is, the second backrest assembly 320 can move relative to the first backrest assembly 110 between a first position and a second position. The first position refers to the lowest position, in which the first backrest assembly 110 can only be raised relative to the second backrest assembly 320 and cannot be lowered further. The second position refers to the highest position, in which the first backrest assembly 110 can only be lowered relative to the second backrest assembly 320 and cannot be raised further.

[0181] The first backrest component 110 can be the backrest body 110; the second backrest component 320 can be the headrest plate 320, or another backrest plate different from the backrest body 110. The following description takes the example where the second backrest component 320 is a headrest plate and the operating mechanism 700 can be used to adjust the height of the headrest part 300.

[0182] Figures 40 to 45 illustrate one embodiment of the operating mechanism 700.

[0183] As shown in Figure 40, a headrest 300 that can move vertically is installed on the upper part of the backrest 100. It can be held in multiple positions relative to the backrest body 110 to adjust the height of the headrest 300.

[0184] In the embodiment shown in Figure 40, the headrest 300 includes a headrest plate 320 located at its lower part, which is vertically movably disposed on the backrest body 110 of the backrest 100, so that the headrest 300 can move more smoothly vertically. It should be understood that the headrest 300 may not have a headrest plate 320, and the headrest 300 may achieve smooth movement through other devices such as guide rails disposed on the backrest body 110.

[0185] The operating mechanism 700 includes a release operation member 710 and a first release drive member disposed at the headrest plate 320 (i.e., the second backrest assembly 320). When the headrest plate 320 (i.e., the second backrest assembly 320) is in the first position, the first release drive member engages with the locking portion 141 of the locking mechanism 140, so that the release operation member 710 can drive the locking portion 141 to release; when the headrest plate 320 (i.e., the second backrest assembly 320) moves away from the first position, the first release drive member disengages from the locking portion 141.

[0186] The first unlocking drive includes a linkage structure 720 pivotally connected to the backrest body 110 (i.e., the first backrest assembly 110) and an operating traction member 730 disposed between the unlocking operation member 710 and the linkage structure 720, so that the unlocking operation member 710 drives the linkage structure 720 through the operating traction member 730. The first movable end 721 of the linkage structure 720 is connected to the operating traction member 730, and the second movable end 722 of the linkage structure 720 can drive the locking part 141 to disengage from the locking part 213. When the headrest plate 320 (i.e., the second backrest assembly 320) is in the first position, the second movable end 722 of the linkage structure 720 can be inserted into the mating groove 1413 of the locking part 141, so that the second movable end 722 of the linkage structure 720 can drive the locking part 141; when the headrest plate 320 (i.e., the second backrest assembly 320) is away from the first position, the second movable end 722 of the linkage structure 720 disengages from the mating groove 1413.

[0187] Specifically, as shown in Figures 40 and 41, the headrest 300 is provided with a release operation member 710, which allows the user to adjust the height of the headrest 300 by applying force to the release operation member 710.

[0188] As shown in Figure 42, the linkage structure 720 is provided on the backrest body 110 and can drive the locking part 141, thereby enabling the operating mechanism 700 to release the pivot between the backrest part 100 and the seat part 200.

[0189] An operating traction member 730 is provided between the release operation member 710 and the linkage structure 720 so that the release operation member 710 drives the linkage structure 720 through the operating traction member 730. This allows the user to release the pivot between the backrest 100 and the seat 200 and adjust the height of the headrest 300 simply by applying force to the release operation member 710.

[0190] The operating traction component 730 can be in the form of a rigid component such as a tie rod as shown in Figure 42, or it can be in the form of a flexible component such as a rope.

[0191] For user convenience, as shown in Figure 42, the operating mechanism 700 may further include an operating reset member 731, which is disposed between the backrest body 110 and the operating traction member 730, and is configured to tend to return the operating traction member 730 to its initial position. It should be understood that the operating reset member 731 may also be disposed between the headrest 300 and the release operating member 710, and is configured to tend to return the release operating member 710 to its initial position. The operating reset member 731 may be an elastic element such as a spring, pneumatic rod, or hydraulic rod.

[0192] Since the user needs to apply force to the release mechanism 710 multiple times when adjusting the headrest 300 to different heights, in order to avoid unintentionally releasing the pivot between the backrest 100 and the seat 200 during this process, the operating mechanism 700 according to this disclosure is configured such that when the headrest 320 is held in the lowest position relative to the backrest body 110, the operating mechanism 700 can drive the locking part 141 to release the pivot between the backrest 100 and the seat 200; when the headrest 320 is moved away from the lowest position relative to the backrest body 110, the operating mechanism 700 can only adjust the height of the headrest 320 relative to the backrest body 110, but cannot drive the locking part 141. "Lowest position" means that when the headrest 320 is in this position, it can only be raised and cannot be lowered further relative to the backrest body 110.

[0193] Figure 42 illustrates one embodiment of the operating mechanism 700 according to this disclosure.

[0194] As shown in Figure 42, the linkage structure 720 of the operating mechanism 700 is pivotally connected to the back body 110. The first movable end 721 of the linkage structure 720 is connected to the operating traction member 730, and the second movable end 722 is configured to drive the locking part 141 to move in the unlocking direction D2, thereby disengaging the locking part 141 from the locking part 213 (see Figure 8), as shown in Figure 44.

[0195] The linkage structure 720 can adopt the structure of an approximately triangular linkage piece as shown in Figure 42, or other suitable structures, as long as it can convert the movement of the operating traction member 730 into the movement of the locking part 141 toward the unlocking direction D2.

[0196] In the embodiment shown in FIG42, when the user applies an upward force to the release operation member 710, causing the release operation member 710 to move upward in the movement direction D1, the release operation member 710 drives the first movable end 721 of the linkage structure 720 through the operation traction member 730. As a result, the linkage structure 720 pivots in the pivoting direction E. The movement of the second movable end 722 of the linkage structure 720 further drives the locking part 141 to move in the release direction D2 until the locking part 141 disengages from the locking part 213 (see FIG8), thereby allowing the backrest part 100 to pivot relative to the seat part 200.

[0197] Figure 43 shows the insertion end 1411 of the locking part 141 extending out of the mounting block 142 to engage with the locking part 213. Figure 44 shows the insertion end 1411 of the locking part 141 retracting into the mounting block 142 to disengage from the locking part 213.

[0198] As shown in Figures 43 and 44, when there are two locking parts 141, there are also two linkage structures 720, so that the two second movable ends 722 of the two linkage structures 720 can drive the two locking parts 141 to move inward toward each other, so that the insertion end 1411 of the locking part 141 retracts into the mounting block 142.

[0199] In this embodiment, a locking reset member 1414 may be provided between the two locking parts 141, which is configured to tend to extend the insertion end 1411 of the locking part 141 out of the mounting block 142. The locking reset member 1414 may be an elastic element such as a spring, a pneumatic rod, or a hydraulic rod.

[0200] In this disclosure, the cooperation relationship between the second movable end 722 of the linkage structure 720 and the locking part 141 requires that the movement of the second movable end 722 can drive the locking part 141 only when the headrest 320 is held in the lowest position relative to the backrest body 110.

[0201] Therefore, in the embodiment shown in FIG42, the locking part 141 is provided with a mating groove 1413, which is configured such that when the headrest 320 is held in the lowest position relative to the backrest body 110, the second movable end 722 of the linkage structure 720 can be inserted into the mating groove 1413, so that the second movable end 722 of the linkage structure 720 can drive the locking part 141; when the headrest 320 is raised relative to the backrest body 110 and leaves the lowest position, for example, when the headrest 320 is raised relative to the backrest body 110 to another higher position, the second movable end 722 of the linkage structure 720 disengages from the mating groove 1413 (see FIG45), at which time the second movable end 722 cannot drive the locking part 141. In this way, when the user adjusts the headrest 320 to the lowest position, applying force to the release operation member 710 can release the pivot between the backrest 100 and the seat 200, so that the backrest 100 pivots relative to the seat 200 to the folded position. When the user adjusts the headrest 320 to a higher position, even if force is applied to the release mechanism 710, the pivot between the backrest 100 and the seat 200 will not be released.

[0202] Once the headrest 320 is adjusted to a suitable position, the operating mechanism 700 further includes a backrest component locking member 740 and a second release drive member 750 to maintain it in that position. The backrest component locking member 740 is disposed on the first backrest component 110 or the second backrest component 320 and is used to operably lock movement between the first backrest component 110 and the second backrest component 320. The second release drive member 750 connects the release operation member 710 and the second locking member (backrest component locking member). The release operation member 710 is configured to release the lock between the first backrest component 110 and the second backrest component 320 by driving the backrest component locking member 740 through the second release drive member 750.

[0203] Additionally, the backrest body 110 (i.e., the first backrest assembly 110) includes a slide groove 111 that allows the headrest plate 320 (i.e., the second backrest assembly 320) to slide, and a plurality of position slots 190 arranged on both sides of the slide groove 111. The backrest assembly locking member 740 can extend out of the headrest plate 320 and insert into one of the plurality of position slots 190 on the backrest body 110, so that the headrest plate 320 is held in one of the plurality of positions relative to the backrest body 110.

[0204] Specifically, as shown in Figures 43 to 45, the backrest component locking member 740 is a headrest locking pin 740 movably disposed on the headrest plate 320 (i.e., the second backrest component 320). It can extend out of the headrest plate 320 and insert into one of the plurality of vertically arranged position slots 190 on the backrest body 110 (i.e., the first backrest component 110) to prevent the headrest plate 320 from moving relative to the backrest body 110, so that the headrest plate 320 is held in one of the plurality of positions relative to the backrest body 110.

[0205] To facilitate the operation of the headrest locking pin 740 for gear switching, the operating mechanism 700 may also include a headrest traction member 750 (i.e., a second release drive member 750), which is disposed between the operating traction member 730 and the headrest locking pin 740, so that the operating traction member 730 drives the headrest locking pin 740 to retract the headrest plate 320 through the headrest traction member 750, thereby allowing the headrest plate 320 to move relative to the backrest body 110, thereby adjusting the height of the headrest plate 320 relative to the backrest body 110.

[0206] In one embodiment, the headrest traction member 750 is an elastic traction member, which allows the headrest locking pin 740 to retract the headrest plate 320 and move relative to the backrest body 110 only after the operating traction member 730 has moved the linkage structure 720 upward to disengage the second movable end 722 of the linkage structure 720 from the mating groove 1413. In other words, the elastic headrest traction member 750 allows the user to release the pivot between the backrest part 100 and the seat part 200 without adjusting the height of the headrest plate 320 relative to the backrest body 110.

[0207] Of course, the headrest traction member 750 can also be a non-elastic or rigid traction member such as a steel wire, which allows the user to adjust the height of the headrest plate 320 relative to the backrest body 110 while releasing the pivot between the backrest part 100 and the seat part 200.

[0208] A locking pin reset element (not shown) may be provided between the headrest plate 320 and the headrest locking pin 740, which is configured to tend to extend the headrest locking pin 740 out of the headrest plate 320. The locking pin reset element may be an elastic element such as a spring, pneumatic rod or hydraulic rod.

[0209] The following describes, with reference to Figures 43 to 45, how to release the pivot between the backrest 100 and the seat 200 and how to adjust the height of the headrest 300.

[0210] As shown in Figure 43, the headrest plate 320 is in the lowest position relative to the backrest body 110. At this time, the second movable end 722 of the linkage structure 720 is inserted into the mating groove 1413 of the locking part 141, so that the second movable end 722 of the linkage structure 720 can drive the locking part 141. Moreover, the headrest locking pin 740 extends out of the headrest plate 320 and is inserted into the lowest position position groove 190 on the backrest body 110, thereby keeping the headrest plate 320 in the lowest position relative to the backrest body 110.

[0211] As shown in Figure 44, when the user applies an upward force to the release mechanism 710, the release mechanism 710 drives the operating traction member 730 to move upward. Then, on one hand, the operating traction member 730 drives the linkage structure 720, which in turn drives the insertion end 1411 of the locking part 141 to retract into the mounting block 142, thereby allowing the backrest 100 to pivot relative to the seat part 200. On the other hand, the operating traction member 730 drives the headrest locking pin 740 to retract the headrest plate 320 via the headrest traction member 750, allowing the headrest plate 320 to move relative to the backrest body 110, thereby adjusting the height of the headrest plate 320 relative to the backrest body 110.

[0212] As shown in Figure 45, when the user continues to apply an upward force to the release mechanism 710, the release mechanism 710 drives the operating traction member 730 to continue moving upward. On one hand, the linkage structure 720 moves upward together with the operating traction member 730, causing its second movable end 722 to disengage from the mating groove 1413. The linkage structure 720 can no longer drive the locking part 141. Therefore, under the elastic force of the locking reset member 1414, the insertion end 1411 of the locking part 141 extends out of the mounting block 142, thereby locking the pivoting of the backrest 100 relative to the seat 200. On the other hand, when the headrest plate 320 reaches a suitable height relative to the backrest body 110, the headrest locking pin 740 can extend out of the headrest plate 320 and insert into the corresponding position slot 190 on the backrest body 110, thereby keeping the headrest plate 320 in the corresponding position relative to the backrest body 110.

[0213] In another embodiment, this disclosure proposes a seat backrest assembly, comprising: a seat portion 200, a first backrest assembly 110 (i.e., a backrest body 110), a second backrest assembly 320 (i.e., a headrest 320), a release operation member 710, a locking part 141, and a first release drive member. The first backrest assembly 110 is pivotally connected to the seat portion 200, and the second backrest assembly 320 is slidably disposed on the first backrest assembly 110 and is slidable between a first position and a second position. The release operation member 710 is disposed on the second backrest assembly 320. The locking part 141 is disposed on the first backrest assembly 110 for operably locking the first backrest assembly 110 and the seat portion 200. Furthermore, when the second backrest assembly 320 is in the first position, the first release drive engages with the locking part 141 so that the release operation member 710 can drive the locking part 141 to release; when the second backrest assembly 320 is away from the first position, the first release drive separates from the locking part 141.

[0214] Additionally, the seat backrest assembly may also include a backrest assembly locking member 740 (i.e., a headrest locking pin 740) and a second release drive member 750 (i.e., a headrest traction member 750). The backrest assembly locking member 740 is disposed on the first backrest assembly 110 or the second backrest assembly 320 for operably locking the sliding between the first backrest assembly 110 and the second backrest assembly 320. The second release drive member 750 connects the release operation member 710 and the backrest assembly locking member 740. The release operation member 710 is configured to release the lock between the first backrest assembly 110 and the second backrest assembly 320 by actuating the backrest assembly locking member 740 via the second release drive member 750.

[0215] In order to enable the backrest 100 to be locked in different unfolded positions relative to the seat 200, an embodiment in which a limiting part 214 is provided in the recess 213 on the seat 200 to restrict the locking part 141 provided on the backrest 100 has been described above with reference to Figures 5 to 13 and Figures 21 to 23.

[0216] Below, Figures 46 to 51B show another embodiment of the engagement between the locking part 141 on the backrest 100 and the recess 213 on the seat 200.

[0217] Unlike the recessed portion 213 in the previous embodiment, the recessed portion 213 in this embodiment is provided with a limiting member 218 made of a soft material. For example, one side of the limiting member 218 is fixed to the inner bottom surface of the recessed portion 213 by adhesive or interference fit, and the other side faces the locking portion 141 and is formed with a rough surface made of a soft material such as silicone or rubber.

[0218] As shown in Figure 48, after the insertion end 1411 of the locking part 141 is inserted into the recess 213, it abuts against the rough surface of the limiting member 218. Because the limiting member 218 applies frictional resistance to the insertion end 1411 of the locking part 141 to prevent it from moving along the extending direction of the recess 213, the backrest 100 can remain in different unfolded positions relative to the seat 200. Furthermore, since the rough surface of the limiting member 218 is made of a soft material, when the locking part 141 extends into the recess 213 under the drive of a spring or the like, the limiting member 218 can buffer the impact between the locking part 141 and the recess 213, achieving a beneficial effect of vibration reduction and noise reduction.

[0219] During the installation of the child safety seat 1, the seat portion 200 is first anchored to the car seat using anchoring fasteners such as ISOFIX connectors. Then, when the child sits on the seat portion 200 and leans back against the backrest portion 100, the backrest portion 100 rotates to the target angle to conform to the car seat back due to the push of the child's back, thus eliminating the need for manual adjustment of the backrest portion 100 angle. Moreover, during the rotation of the backrest portion 100, the limiting member 218 provides uniform frictional resistance to the movement of the locking portion 141 along the recess 213, and holds the backrest portion 100 at the target angle, preventing the backrest portion 100 from swaying freely relative to the seat portion 200.

[0220] On the other hand, when it is necessary to adjust the unfolded position of the backrest 100 relative to the seat 200, the user can press the release operation part 143 (see Figure 46, which can be the same as the release operation part 143 in the aforementioned embodiment) with their finger in the direction of the arrow, causing the locking part 141 to retract and disengage from the limiting member 218, so that the backrest 100 can pivot freely relative to the seat 200. When the backrest 100 is pivoted to the appropriate position relative to the seat 200, the user no longer presses the release operation part 143, and the locking part 141 will extend under the action of the reset member 149 (see Figure 48, which can be the same as the reset member 149 in the aforementioned embodiment), and its insertion end 1411 abuts against the limiting member 218, thereby causing the backrest 100 to remain in that position relative to the seat 200. This not only allows for stepless limiting of the pivot angle of the backrest 100 relative to the seat 200, but also avoids the backrest 100 from being too loose and difficult to limit its pivot angle relative to the seat 200, thus affecting the user experience.

[0221] Of course, the user can also directly apply a pivoting force to the backrest 100. When the force can overcome the resistance exerted by the limiting member 218 on the insertion end 1411 of the locking member 141, the backrest 100 pivots relative to the seat 200. Therefore, the seat 200 does not need to be provided with the release operation part 143, thereby simplifying the structure of the seat 200.

[0222] Figures 49A to 49C show the positional relationship between the locking part 141 and the limiting member 218 when the backrest 100 and the seat 200 are in different unfolded positions.

[0223] As shown in Figure 49A, when the backrest 100 pivots to the upright position relative to the seat 200, the locking part 141 abuts against the upper right part of the limiting member 218, thereby keeping the backrest 100 in the upright position relative to the seat 200.

[0224] As shown in Figure 49B, when the backrest 100 pivots relative to the seat 200 to a moderately tilted position, the locking part 141 abuts against the middle portion of the limiting member 218, thereby causing the backrest 100 to remain in the moderately tilted position relative to the seat 200. The moderately tilted position is located between the upright position and the maximum tilted position, and there can be multiple such positions.

[0225] As shown in Figure 49C, when the backrest 100 pivots relative to the seat 200 to the maximum tilt position, the locking part 141 abuts against the lower left part of the limiting member 218, thereby causing the backrest 100 to remain at the maximum tilt position relative to the seat 200.

[0226] As shown in Figures 47 and 48, the limiting member 218 can be fixed to the inner bottom surface of the recess 213 by means of gluing, screwing, riveting or interference fit.

[0227] Of course, this disclosure is not limited thereto. The limiting member 218 may also be fixed to the inner peripheral surface of the recess 213, as long as it can apply resistance to the insertion end 1411 of the locking part 141.

[0228] To facilitate fixing the limiting member 218 to the recess 213, as shown in FIG50, the limiting member 218 may include a damping pad 2181 that contacts the insertion end 1411 of the locking part 141 and a mounting pad 2182 for fixing the damping pad 2181 thereon.

[0229] The damping pad 2181 can be a sheet-like soft rubber pad, for example, it can be made of materials such as silicone, rubber or TPE.

[0230] The damping pad 2181 can be fixed to the mounting pad 2182 by means of adhesive or secondary injection molding.

[0231] The mounting pad 2182 can be secured to the recess 213 in various ways. In one embodiment, the mounting pad 2182 has a fixing protrusion 218A, and the recess 213 has a fixing recess 213A (see FIG. 50). By engaging the fixing protrusion 218A to the fixing recess 213A, the mounting pad 2182 and the damping pad 2181 thereon are secured to the recess 213.

[0232] Of course, this disclosure is not limited to this.

[0233] Mounting pad 2182 can be fixed to recess 213 by means of adhesive, screwing, riveting or interference fit.

[0234] In another embodiment, the damping pad 2181 and the mounting pad 2182 can be integrally formed as a limiting member 218, thereby increasing the thickness of the soft rubber material.

[0235] In this alternative embodiment, as shown in FIG51A, the limiting member 218 is provided with a fixing protrusion 218A, which can engage with the fixing recess 213A of the recess 213 so that the limiting member 218 is fixed to the recess 213.

[0236] To increase the resistance exerted by the limiting member 218 on the insertion end 1411 of the locking part 141, the contact surface between the damping pad 2181 and the insertion end 1411 of the locking part 141 may be provided with raised texture. As shown in FIG51B, the rough surface of the limiting member 218 that contacts the insertion end 1411 may form an anti-slip pattern 218B. The anti-slip pattern 218B may take the form of multiple groove structures, multiple raised structures, or a combination of both.

[0237] In one embodiment, the end face of the insertion end 1411 of the locking part 141 that contacts the limiting member 218 can be formed to have a larger area, thereby increasing the contact surface between the insertion end 1411 and the limiting member 218, thereby increasing the sliding resistance applied by the limiting member 218 to the insertion end 1411 and providing cushioning against impacts to the bottom wall of the recess 213.

[0238] The foregoing embodiments and advantages are merely exemplary and should not be considered as limiting the invention. The description herein is intended to be illustrative and not to limit the scope of the claims. Various alternatives, modifications, and alterations will be apparent to those skilled in the art. The features, structures, methods, and other characteristics of the exemplary embodiments described herein can be combined in various ways to obtain other and / or alternative exemplary embodiments.

[0239] Since the features of the invention can be embodied in various forms without departing from the nature of the invention, it should also be understood that the above embodiments are not limited to any of the details described above, unless otherwise stated, and should be broadly interpreted as falling within the scope defined by the appended claims. Therefore, all modifications and alterations falling within the scope and limits of the claims or equivalents thereof should be covered by the appended claims.

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