Seat back assembly

Abstract

Seat back assembly provided. [Solution] The seat back assembly comprises a backrest, a headrest slidably attached to the upper end of the backrest, side wings positioned on the sides of the backrest and foldable and unfoldable relative to the backrest, and a drive member positioned on the backrest or headrest and moving relative to the backrest together with the headrest. Between the side wings and the backrest is a limiting device that limits the width of folding and unfolding of the side wings relative to the backrest, and the limiting device includes a slot structure and a projection structure positioned within the slot structure and slidable within the slot structure. The slot structure is positioned on one of the backrest and the side wing, and the projection structure is attached to the other of the backrest and the side wing, and the drive member drives the side wings to unfold relative to the backrest when the headrest slides away from the backrest.

Description

Technical Field

[0001] The present invention relates to the field of child seats, and more particularly to a seat back assembly and a child seat.

Background Art

[0002] A child seat is a device that is assembled in a vehicle and secures a child on the child seat by a restraint device to ensure the safety of the child. A child seat can minimize the injury of a child in case of an emergency brake or a collision due to an accident, and thus is widely accepted by consumers and widely used around the world.

[0003] Current child seats generally include a seat, a backrest connected to the seat, and a headrest and a side wing connected to the backrest. The headrest and the side wing are generally adjustable relative to the backrest to fit children of different body sizes. In one currently commercially available child seat, the side wing can be pivoted by adjusting the height of the headrest relative to the backrest, thereby achieving the purpose of simultaneously adjusting the height of the headrest and the width of the side wing. However, such a child seat has a complex structure that cannot be easily operated.

[0004] Therefore, in order to solve the above problems, a seat back assembly and a child seat having a simple structure are needed.

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present disclosure is to provide a seat back assembly having a simple structure.

[0006] Another object of the present disclosure is to provide a child seat having a simple structure. [Means for solving the problem]

[0007] To achieve the above objective, this disclosure provides a seatback assembly including a backrest, a headrest, and side wings. The headrest is slidably attached to the upper end of the backrest, and the side wings are positioned on the sides of the backrest and can be folded and unfolded relative to the backrest. The seatback assembly further includes a drive member positioned on the backrest or headrest and movable relative to the backrest together with the headrest. The headrest has at least an initial position close to the backrest and a working position that drives the side wings to unfold relative to the backrest. The side wings fold onto the backrest when the headrest slides to a position between the initial position and the working position. The drive member drives the side wings to unfold relative to the backrest when the headrest slides away from the backrest beyond the working position.

[0008] Preferably, the side wings are rotatably mounted to the backrest.

[0009] Preferably, the lower end of the side wing is pivotally connected to the backrest.

[0010] Preferably, the drive member is slidably mounted to the backrest.

[0011] Preferably, the seat back assembly of the present disclosure further includes a guide post located at the rear of the backrest, and the drive member is slidably fitted onto the guide post.

[0012] Preferably, the guidepost extends in the direction of the height of the backrest.

[0013] Preferably, the drive member pushes the side wings to extend them relative to the backrest when the headrest slides away from the backrest and exceeds its operating position.

[0014] Preferably, the side wings include a press-to-depressor structure that protrudes toward the drive member, and the headrest is driven to extend the side wings toward the backrest via the press of the press-to-depressor structure by the drive member.

[0015] Preferably, the pressed structure is located above the drive member when the headrest is in its initial position, and one of the drive member and the pressed structure is provided with an inclined surface structure, while the other of the drive member and the pressed structure faces the inclined surface structure.

[0016] Preferably, a limiting device is provided between the side wings and the backrest to limit the width to which the side wings can be folded and extended relative to the backrest.

[0017] Preferably, the seatback assembly of the present disclosure further includes an elastic member positioned between the side wings and the backrest, the elastic member having a constant tendency to drive the side wings to fold relative to the backrest.

[0018] Preferably, the limiting device includes a slot structure and a projection structure disposed within and slidable within the slot structure, wherein the slot structure is located on one of the backrest and the side wing, and the projection structure is attached to the other of the backrest and the side wing.

[0019] Preferably, the elastic member is positioned at the rear of the side wing, with one end of the elastic member connected to a projection structure and the other end of the elastic member connected to the side wing.

[0020] Preferably, the elastic member is a spring.

[0021] Preferably, the extension direction of the slot structure and the direction of motion of the drive member are arranged to intersect.

[0022] The child seat of the present disclosure includes a seat body and the above-mentioned seat back assembly, and the lower end of the backrest is attached to the seat body.

[0023] Compared with the prior art, the seat back assembly of the present disclosure further includes a driving member disposed on the headrest and moving with the headrest relative to the backrest. The headrest has at least an initial position close to the backrest relative to the backrest and an operating position for driving the side wings to deploy relative to the backrest. The side wings are folded onto the backrest when the headrest is located between the initial position and the operating position, and the driving member drives the side wings to deploy relative to the backrest when the headrest moves away from the backrest and exceeds the operating position. Therefore, when the height of the headrest is adjusted, the headrest can drive the two side wings to deploy through the driving member, thereby simultaneously adjusting the width between the two side wings while the headrest is being adjusted, thereby providing ease of use and simple operation for children of different body sizes. On the other hand, the two side wings can be simultaneously driven to deploy by only one driving member, thus significantly simplifying the structure of the seat back assembly.

[0024] It can be understood that the child seat having the seat back assembly of the present disclosure provides the same technical effect.

Brief Description of the Drawings

[0025] [Figure 1] FIG. 1 is a schematic three-dimensional structure diagram of two side wings folded against the backrest of the child seat of the present disclosure. [Figure 2] FIG. 2 is a schematic three-dimensional structure diagram of the child seat of the present disclosure with the headrest and the upper partial structure of the backrest hidden. [Figure 3] FIG. 3 is a schematic plan structure diagram of the child seat of the present disclosure viewed from the rear with the protrusion structure hidden and the headrest in the initial position. [Figure 4] FIG. 4 is a schematic plan view of the child seat of the present disclosure as viewed from the rear, with the protruding structure hidden and the headrest in the operating position. [Figure 5] FIG. 5 is a schematic three-dimensional view of the child seat of the present disclosure as viewed from another angle. [Figure 6] FIG. 6 is a schematic three-dimensional view of the child seat of the present disclosure when the protruding structure is hidden and the headrest slides away from the backrest and exceeds the operating position.

MODE FOR CARRYING OUT THE INVENTION

[0026] In order to better explain the technical content and structural features of the present disclosure, embodiments will be described in detail together with the following attached drawings.

[0027] As shown in Figures 1 to 6, the child seat 100 of the present disclosure includes a seat back assembly 10 and a seat body 20. The seat back assembly 10 is positioned at the upper end of the seat body 20 and is supported and secured by the seat body 20. Specifically, the seat back assembly 10 includes a backrest 11, a headrest 12, and side wings 13. The headrest 12 is slidably attached to the upper end of the backrest 11, thereby allowing the height of the headrest 12 to be adjusted relative to the backrest 11. The side wings 13 are positioned on the sides of the backrest 11 and are foldable and unfoldable relative to the backrest 11, thereby allowing the side wings 13 to be foldable and unfoldable relative to the backrest 11. Preferably, the side wings 13 are positioned on both the left and right sides of the backrest 11, and the included angle between the plane on which the side wings 13 are located and the plane on which the backrest 11 is located is constant, and the two side wings 13, the backrest 11 and the seat body 20 together enclose an open cavity for seating a child. The user can adjust the headrest 12 on the backrest 11, and the headrest 12 can be raised and lowered on the backrest 11, thereby accommodating the headrest 12 to the child's head and providing ease of use for children of different body sizes. Furthermore, the user can adjust the side wings 13 via the backrest 11, and the side wings 13 are extendable or foldable relative to the backrest 11 and adjustable according to the size of the open cavity, thereby providing ease of use for children of different body sizes and providing better protection for the child seated in the child seat 100. For example, the position of the headrest 12 on the backrest 11 can be adjusted to easily adjust the height of the headrest 12, but is not limited to this. The backrest 11, headrest 12, and side wings 13 of this disclosure are implemented by known structures, and their relevant details are omitted here. The seat back assembly 10 is described in more detail below in conjunction with Figures 1 to 6.

[0028] As shown in Figures 2 to 6, the seatback assembly 10 further includes a drive member 14 positioned on the headrest 12 and moving with the headrest 12 relative to the backrest 11. The headrest 12 has at least an initial position close to the backrest 11 (see Figure 3) and an operating position (see Figures 4 and 5) that drives the side wings 13 to unfold relative to the backrest 11. The side wings 13 fold onto the backrest 11 when the headrest 12 slides to a position between the initial position and the operating position, and the drive member 14 drives the side wings 13 to unfold relative to the backrest 11 when the headrest 12 slides away from the backrest 11 and passes the operating position. Therefore, when the height of the headrest 12 is adjusted, the headrest 12 can be driven via the drive member 14 to extend the two side wings 13, thereby synchronously adjusting the width between the two side wings 13 while the headrest 12 is being adjusted, thereby providing ease of use and simple operation for children of different body sizes. Alternatively, the two side wings 13 can be driven to extend by only one drive member 14, thus significantly simplifying the structure of the seat back assembly 10. Specifically, the side wings 13 are rotatably mounted to the backrest 11 to facilitate adjustment of folding and extending. Preferably, a preferred method for achieving rotatable mounting of the side wings 13 to the backrest 11 is to pivotally connect the lower end of the side wings 13 to the backrest 11. Thus, the connection between the side wings 13 and the backrest 11 is simple and easy to install and position.

[0029] As shown in Figures 2 to 6, the drive member 14 is slidably mounted on the backrest 11 so as to enable the headrest 12 to quickly drive and move the drive member 14. Preferably, to enable the drive member 14 to slide more smoothly on the backrest 11, the seat back assembly 10 further includes guide posts 15 located at the rear of the backrest 11, and the drive member 14 is slidably fitted onto the guide posts 15. Preferably, the guide posts 15 are located on both the left and right sides of the rear of the backrest 11. The guide posts 15 are, for example, tubular plastic rods or tubular metal rods, but are not limited to these, and the drive member 14 is, for example, a tubular plastic member or a tubular metal member, but are not limited to these. To increase the structural stability of the two guide posts 15, a connecting rod 16 is mounted between the two guide posts 15. Furthermore, the upper part of the guide post 15 does not extend beyond the side wing 13 to minimize any undesirable impact on the appearance of the child seat 10. In this embodiment, the upper part of the guide post 15 is, for example, substantially coplanar with the upper part of the side wing 13, but is not limited to these. Specifically, the guide post 15 extends in the height direction of the backrest 11. Therefore, when the headrest 12 is adjusted away from the backrest 11, the drive member 14 is driven accordingly to slide along the guide post 15, thereby allowing the drive member 14 to slide directly and quickly upward with the headrest 12. In this embodiment, the drive member 14 can be positioned on the headrest 12 by a flexible member. For example, the drive member 14 can be connected to the headrest 12 by a rope or steel wire. Depending on the actual requirements, the drive member 14 may be positioned on the headrest 12 by a rigid member. For example, the drive member 14 may be attached to the headrest 12 by a flexible pin. Alternatively, the drive member 14 may, for example, be part of the headrest 12, but is not limited thereto. In other embodiments, the drive member 14 may be further positioned on the backrest 11, insofar as it can move together with the headrest 12.Preferably, in this embodiment, when the headrest 12 is in its initial position, it is positioned close to the backrest 11, in which case the headrest 12 is suitable, for example, for small children, but is not limited thereto. When the headrest 12 is in its operating position, it is not far from the backrest 11, and the child seat 100 is suitable, for example, for small to medium-sized children, but is not limited thereto. The above operating positions can be adjusted according to the requirements of different applications.

[0030] As shown in Figures 2 to 6, when the headrest 12 slides away from the backrest 11 and exceeds its operating position, the drive member 14 pushes the side wings 13 to extend them toward the backrest 11. Therefore, the transmission relationship between the drive member 14 and the side wings 13 is simple and the arrangement is convenient. Specifically, the side wings 13 are provided with a pressable structure 131 that protrudes toward the drive member 14. The headrest 12 drives the side wings 13 so that they extend toward the backrest 11 when the drive member 14 presses the pressable structure 131, thereby allowing the drive member 14 to easily press and extend the side wings 13 with the pressable structure 131. For example, in this embodiment, the pressable structure 131 is a sheet-like structure. Depending on the actual needs, the pressable structure 131 may be, for example, a block-like structure or a pin-like structure, but is not limited to these. To provide better pressing coordination between the pressed structure 131 and the drive member 14, the drive member 14 is connected to, for example, a pressing portion (not shown). The pressing portion is located directly below the pressed structure 131 and moves together with the drive member 14, and the drive member 14 drives the side wings 13 to deploy through mutual pressing between the pressing portion and the pressed structure 131. Preferably, the pressing portion is included in, for example, the drive member 14, but is not limited thereto. More specifically, when the headrest 12 is in its initial position, the pressed structure 131 is above the drive member 14. The pressed structure 131 is provided with an inclined surface structure 132, and the drive member 14 faces the inclined surface structure 132. The drive member 14 can easily drive the side wings 13 via the inclined surface structure 132 to rotate and deploy them. Depending on the actual requirements, the inclined surface structure 132 can be positioned on the drive member 14, and similarly, the objective of easily driving the rotation and deployment of the side wings 13 can be achieved.

[0031] As shown in Figures 2 to 6, a limiting device 17 is provided between the side wing 13 and the backrest 11 to limit the width of folding and unfolding of the side wing 13 relative to the backrest 11. The side wing 13 can rotate within a certain range by the limiting device 17, thus preventing excessive folding and unfolding of the side wing 13 and ensuring normal use of the side wing 13. To enable the side wing 13 to automatically fold relative to the backrest 11 in its normal state, the seat back assembly 10 further includes an elastic member 18 positioned between the side wing 13 and the backrest 11, where the elastic member 18 has a tendency to drive the side wing 13 to always fold relative to the backrest 11. Thus, the unfolded side wing 13 can be automatically reset by the elastic member 18, facilitating the automatic folding of the side wing 13. Specifically, the limiting device 17 includes a slot structure 171 and a projection structure 172 that is positioned within the slot structure 171 and is slidable within the slot structure 171. The slot structure 171 is positioned on the side wing 13, and the projection structure 172 is attached to the backrest 11, thereby giving the limiting device 17 a simple structure and convenient positioning and attachment. Depending on the actual requirements, in other embodiments, the slot structure 171 can be positioned on the backrest 11 and the projection structure 172 can be attached to the side wing 13 to achieve the objective of limiting the width of folding and unfolding the side wing 13. For example, the projection structure 172 is a pin, but is not limited thereto. More specifically, an elastic member 18 is positioned at the rear of the side wing 13, with one end of the elastic member 18 connected to the projection structure 172 and the other end of the elastic member 18 connected to the side wing 13. Since the elastic member 18 is positioned at the rear of the side wing 13, it is easy to conceal the elastic member 18, and the structure of the seat back assembly 10 becomes more compact. To easily attach the elastic member 18 to the side wing 13, a stop block 133 is provided at the rear of the side wing 13. One end of the elastic member 18 is connected to the projection structure 172, and the other end of the elastic member 18 is connected to the stop block 133.For example, in this embodiment, the elastic member 18 is a spring such as a tension spring, compression spring, or torsion spring, but is not limited to these. The extension direction of the slot structure 171 and the direction of motion of the drive member 14 are intersecting in order to allow the side wing 13 to rotate smoothly for deployment or folding as the projection structure 172 slides within the slot structure 171.

[0032] The operating principle of the child seat 100 of this disclosure will be explained in conjunction with Figures 1 to 6. In order to use the child seat 100, the headrest 12 is raised or pressed downward according to the child's body size so that the headrest 12 accommodates the child's head. As shown in Figure 3, when the headrest 12 is in a low position, i.e., when the headrest 12 is between the initial position and the operating position, the drive member 14 is away from the pressed structure 131 and therefore does not press the pressed structure 131. Since the elastic member 18 is not pressed, the two side wings 13 are folded onto the backrest 11 by the elastic member 18. In this case, the cavity jointly enclosed by the two side wings 13, the backrest 11, and the seat body 20 is relatively small, and therefore the child seat 100 of this disclosure is suitable for seating children with smaller body sizes. When the headrest 12 is adjusted from a low position to a high position, that is, when the headrest 12 is raised along direction F1 in Figure 3, the headrest 12 drives the drive member 14 upward so that the drive member 14 gradually approaches the pressed structure 131. When the headrest 12 reaches the operating position, the drive member 14 presses against the inclined surface structure of the pressed structure 131, the state of the child seat 100 in this case is shown in Figures 4 and 5. When the headrest 12 is continuously raised along direction F2 in Figures 4 and 5, the drive member 14 begins to push against the pressed structure 131 once the headrest 12 has passed the operating position, causing the side wings 13 to rotate and unfold relative to the backrest 11. In this case, the cavity jointly enclosed by the two side wings 13, the backrest 11, and the seat body 20 gradually increases in size. Meanwhile, the projection structure 172 slides within the slot structure 171, and the projection structure 172 presses against and compresses the elastic member 18. In this case, the child seat 100 is in the state shown in Figure 6, and the child seat 100 is suitable for seating larger-sized children.

[0033] When the child seat 100 is no longer in use, the headrest 12 is adjusted to a lower position, which causes the drive member 14 to disengage from the pressed structure 131, and the elastic member 18 to return to its original position. The restored elastic member 18 drives the side wings 13 to fold against the backrest 11, thus enabling the child seat 100 of the present disclosure to be reset for the next use.

[0034] Compared to prior art, the seatback assembly 10 of this disclosure further includes a drive member 14 positioned on the headrest 12 and moving with the headrest 12 relative to the backrest 11. The headrest 12 has at least an initial position close to the backrest 11 and a working position that drives the side wings 13 to unfold relative to the backrest 11. The side wings 13 are folded over the backrest 11 when the headrest 12 is positioned between the initial position and the working position, and the drive member 14 drives the side wings 13 to unfold relative to the backrest 11 when the headrest 12 moves away from the backrest 11 and beyond the working position. Thus, when the height of the headrest 12 is adjusted, the headrest 12 can be driven via the drive member 14 to unfold the two side wings 13, thereby simultaneously adjusting the width between the two side wings 13 while the headrest 12 is being adjusted, providing ease of use and simple operation for children of different body sizes. On the other hand, since the headrest 12 can be adjusted and the two side wings 13 can be deployed simultaneously by a single drive member 14, the structure of the seat back assembly 10 is significantly simplified.

[0035] Furthermore, a child seat 100 having the seat back assembly 10 of this disclosure achieves the same technical effect.

[0036] The following is an example of the claims as originally filed. [Example 1] A seat back assembly, The backrest and, A headrest is slidably attached to the upper end of the aforementioned backrest, Side wings positioned on the sides of the backrest and foldable and unfoldable relative to the backrest, The backrest or headrest comprises a drive member that is positioned on the backrest or headrest and moves with respect to the backrest together with the headrest, The headrest has at least an initial position close to the backrest and an operating position that drives the side wings to extend relative to the backrest, the side wings are folded onto the backrest when the headrest slides to a position between the initial position and the operating position, and the drive member drives the side wings to extend relative to the backrest when the headrest slides away from the backrest and passes the operating position. A seat back assembly characterized by the following features. [Example 2] The seat back assembly according to Embodiment 1, characterized in that the side wings are rotatably attached to the backrest. [Example 3] The seat back assembly according to Embodiment 1 or 2, characterized in that the lower end of the side wing is pivotably connected to the backrest. [Example 4] The seat back assembly according to any one of Embodiments 1 to 3, characterized in that the drive member is slidably attached to the backrest. [Example 5] The seat back assembly according to any one of Embodiments 1 to 4, further comprising a guide post positioned at the rear of the backrest, wherein the drive member is slidably fitted onto the guide post. [Example 6] The seat back assembly according to Embodiment 5, characterized in that the guide post extends in the height direction of the backrest. [Example 7] The seat back assembly according to any one of Embodiments 1 to 6, characterized in that the drive member pushes the side wing to extend it relative to the backrest when the headrest slides away from the backrest and exceeds the operating position. [Example 8] The seat back assembly according to Embodiment 7, characterized in that the side wing is provided with a pressure-receiving structure that protrudes toward the drive member, and the headrest is driven to extend the side wing toward the backrest via the pressure of the pressure-receiving structure by the drive member. [Example 9] The seat back assembly according to Embodiment 8, characterized in that the pressed structure is located above the drive member when the headrest is in the initial position, an inclined surface structure is provided on one of the drive member and the pressed structure, and the other of the drive member and the pressed structure faces the inclined surface structure. [Example 10] A seat back assembly according to any one of Embodiments 1 to 9, characterized in that a limiting device for limiting the width of folding and unfolding the side wings relative to the backrest is provided between the side wings and the backrest. [Example 11] The seat back assembly according to Embodiment 10, further comprising an elastic member positioned between the side wings and the backrest, wherein the elastic member has a tendency to always drive the side wings to fold relative to the backrest. [Example 12] The seat back assembly according to Embodiment 11, characterized in that the limiting device comprises a slot structure and a projection structure disposed within the slot structure and slidable within the slot structure, wherein the slot structure is disposed on one of the backrest and the side wing, and the projection structure is attached to the other of the backrest and the side wing. [Example 13] The seat back assembly according to Embodiment 12, characterized in that the elastic member is positioned at the rear of the side wing, one end of the elastic member is connected to the projection structure, and the other end of the elastic member is connected to the side wing. [Example 14] The seat back assembly according to Embodiment 12 or 13, characterized in that the extending direction of the slot structure and the direction of motion of the drive member are arranged to intersect. [Example 15] The seat back assembly according to any one of Examples 11 to 14, characterized in that the elastic member is a spring. [Example 16] A child car seat including a seat back assembly and a seat body, The seat back assembly is as described in any of Examples 1 to 15, and the lower end of the backrest is attached to the seat body. A child car seat characterized by the following features.

[0037] Preferred embodiments of the present disclosure are disclosed above and should not be construed as limitations on the invention described in the claims. Accordingly, all equivalent modifications to the invention described in the claims should be included within the scope of the present disclosure.

Claims

1. The backrest and, A headrest is slidably attached to the upper end of the aforementioned backrest, Side wings are positioned on the sides of the backrest and are foldable and unfoldable relative to the backrest, The device comprises a drive member positioned on the backrest or the headrest and moving together with the headrest relative to the backrest, A limiting device is provided between the side wing and the backrest to limit the width of the side wing's folding and unfolding relative to the backrest. The limiting device includes a slot structure and a projection structure disposed within the slot structure and slidable within the slot structure. The slot structure is located on one of the backrest and the side wing, and the projection structure is attached to the other of the backrest and the side wing. The drive member drives the side wings to extend relative to the backrest when the headrest slides away from the backrest. A seat back assembly characterized by the following features.

2. The seat back assembly according to claim 1, characterized in that the side wings are rotatably attached to the backrest, and the lower ends of the side wings are pivotally connected to the backrest.

3. The seat back assembly according to claim 1, characterized in that the drive member is slidably attached to the backrest.

4. The seat back assembly according to claim 1, further comprising a guide post located at the rear of the backrest, wherein the drive member is slidably fitted onto the guide post, and the guide post extends in the height direction of the backrest.

5. The seat back assembly according to claim 1, wherein the side wing includes a press-to-depression structure that protrudes toward the drive member, and the headrest drives the side wing to extend toward the backrest via the press of the press-to-depression structure by the drive member.

6. The seat back assembly according to claim 5, characterized in that one of the drive member and the pressed structure is provided with an inclined surface structure, and the other of the drive member and the pressed structure faces the inclined surface structure.

7. The seat back assembly according to claim 1, characterized in that the extending direction of the slot structure and the direction of motion of the drive member are arranged to intersect.

8. The system further comprises an elastic member positioned between the side wing and the backrest, The seat back assembly according to claim 1, characterized in that the elastic member is positioned at the rear of the side wing, one end of the elastic member is connected to the projection structure, and the other end of the elastic member is connected to the side wing.

9. The elastic member has a tendency to drive the side wings to always fold in relation to the backrest. The folded side wings are pushed by the drive member and unfold relative to the backrest when the headrest slides upward, and at this time the elastic member is compressed. The seatback assembly according to claim 8, characterized in that when the headrest slides downward, the compressed elastic member returns to its original state, and the unfolded side wings are driven by the elastic member to fold against the backrest.

10. A child seat comprising a seat body and a seat back assembly according to any one of claims 1 to 9, A child car seat characterized in that the lower end of the backrest is attached to the seat body.

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