Seat back assembly

Abstract

To provide a seat back assembly with a simple structure.SOLUTION: A seat back assembly comprises a backrest, a headrest which is attached to an upper end part of the backrest so as to make it possible to slide, a side wing which is disposed on a side part of the backrest and makes it possible to fold and expand to the backrest and a driving member which is disposed on the backrest or the headrest and moves along with the headrest for the backrest. The seat back assembly further comprises an elastic member which is disposed between the side wing and the backrest. The expanded side wing is folded into the backrest by being driven by the elastic member when the headrest slides down. The folded side wing expands to the backrest by being pushed by the elastic member when the headrest slides up.SELECTED DRAWING: Figure 1

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 technology]

[0002] A child car seat is a device that is assembled in a vehicle and secures a child on the child car seat by a restraining device to ensure the safety of the child. Child car seats can minimize the injury of children in the event of emergency braking or accidental collision, and therefore are widely accepted by consumers and widely used around the world.

[0003] Current child car seats usually include a seat, a backrest connected to the seat, and a headrest and side wings connected to the backrest. The headrest and side wings are generally adjustable relative to the backrest to accommodate children of different body sizes. In one child car seat currently on the market, the side wings can be pivoted by adjusting the height of the headrest relative to the backrest, thereby achieving the purpose of adjusting the height of the headrest and the width of the side wings simultaneously. However, such a child car seat has a complicated 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 [Problem 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] In order to achieve the above object, the present disclosure provides a seat back assembly including a backrest, a headrest, and side wings. The headrest is slidably attached to an upper end of the backrest, and the side wings are disposed on the sides of the backrest and can be folded and deployed relative to the backrest. The seat back assembly further includes a drive member disposed on the backrest or the headrest and movable together with the headrest relative to the backrest. The headrest has at least an initial position close 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 slides to a position between the initial position and the operating position. The drive member drives the side wings to deploy relative to the backrest when the headrest slides away from the backrest beyond the operating position.

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

[0009] Preferably, the lower ends of the side wings are 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 disposed at the rear of the seat back, the drive member being slidably sleeved on the guide post.

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

[0013] Preferably, the drive member urges the side wings to deploy against the backrest when the headrest slides away from the backrest past the operative position.

[0014] Preferably, the side wing includes a pressure-receiving structure that protrudes in a direction toward the drive member, and the headrest drives the side wing to deploy against the backrest via pressure of the pressure-receiving structure by the drive member.

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

[0016] Preferably, a limiting device is provided between the side wing and the backrest for limiting the width of folding and unfolding of the side wing relative to the backrest.

[0017] Preferably, the seat back assembly of the present disclosure further includes an elastic member disposed between the side wings and the backrest, the elastic member having a tendency to constantly urge the side wings to fold against the backrest.

[0018] Preferably, the limiting device includes a slot structure and a protrusion structure disposed within and slidable within the slot structure, the slot structure being disposed in one of the backrest and the side wing, and the protrusion structure being attached to the other of the backrest and the side wing.

[0019] Preferably, the elastic member is disposed at the rear of the side wing, one end of the elastic member is connected to the protruding structure, and the other end of the elastic member is connected to the side wing.

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

[0021] Preferably, the extension direction of the slot structure and the movement direction 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, with the lower end of the backrest 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 together 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 is away from the backrest and beyond the operating position. Thus, when the height of the headrest is adjusted, the headrest can be driven to deploy the two side wings via the driving member, thereby simultaneously adjusting the width between the two side wings while the headrest is adjusted, thereby providing ease of use and easy operation for children with different body sizes. Meanwhile, 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 seen that a child car seat having the seat back assembly of the present disclosure provides the same technical advantages. [Brief description of the drawings]

[0025] [Figure 1] FIG. 1 is a schematic diagram of the three-dimensional structure of the two side wings of the child seat of the present disclosure in a folded state against the backrest. [Diagram 2] FIG. 2 is a three-dimensional structural schematic diagram of the child car seat of the present disclosure, in which the headrest and upper part of the backrest structure are hidden. [Diagram 3] FIG. 3 is a schematic plan view of the child car seat of the present disclosure, seen 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 car seat of the present disclosure, seen from the rear, with the protruding structure hidden and the headrest in the operating position. [Diagram 5] FIG. 5 is a schematic diagram of the three-dimensional structure of the child car seat of the present disclosure as viewed from another angle. [Figure 6] FIG. 6 is a three-dimensional structural schematic diagram of the child car seat of the present disclosure when the protruding structure is hidden and the headrest has been slid away from the backrest and beyond the operating position. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] In order to better explain the technical contents and structural features of the present disclosure, embodiments are described in detail in conjunction with the accompanying drawings below.

[0027] As shown in Figs. 1 to 6, a child seat 100 of the present disclosure includes a seat back assembly 10 and a seat body 20. The seat back assembly 10 is disposed at the upper end of the seat body 20, and is supported and fixed 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, whereby the height of the headrest 12 is adjustable relative to the backrest 11. The side wings 13 are disposed at the sides of the backrest 11 and are foldable and unfoldable relative to the backrest 11, whereby the side wings 13 are foldable and unfoldable relative to the backrest 11. Preferably, the side wings 13 are disposed on the left and right sides of the backrest 11, respectively, and the included angle between the plane where the side wings 13 are located and the plane where 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 a child to sit in. The user can adjust the headrest 12 on the backrest 11, and the headrest 12 can rise and fall on the backrest 11, thereby making the headrest 12 correspond 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 can be unfolded or folded against the backrest 11 and can be adjusted 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, but not limited to, the position of the headrest 12 on the backrest 11 can be adjusted to easily adjust the height of the headrest 12. It should be noted that the backrest 11, the headrest 12, and the side wings 13 of the present disclosure are implemented by known structures, and the relevant details thereof are omitted here. The seat back assembly 10 will be described in further detail below in combination with Figures 1 to 6.

[0028] 2 to 6, the seat back assembly 10 further includes a drive member 14 disposed on the headrest 12 and moving together with the headrest 12 relative to the backrest 11. The headrest 12 has at least an initial position (see FIG. 3) close to the backrest 11 and an operating position (see FIGS. 4 and 5) for driving the side wings 13 to unfold relative to the backrest 11. When the headrest 12 slides to a position between the initial position and the operating position, the side wings 13 are folded onto the backrest 11, and when the headrest 12 slides away from the backrest 11 beyond the operating position, the drive member 14 drives the side wings 13 to unfold relative to the backrest 11. Therefore, when the height of the headrest 12 is adjusted, the headrest 12 can be driven to deploy the two side wings 13 via the driving member 14, thereby synchronously adjusting the width between the two side wings 13 while the headrest 12 is adjusted, thereby providing ease of use and easy operation for children of different body sizes. Meanwhile, the two side wings 13 can be driven to deploy by only one driving member 14, thus significantly simplifying the structure of the seat back assembly 10. Specifically, the side wings 13 are rotatably attached to the backrest 11 to facilitate the adjustment of folding and deployment. Preferably, the preferred method for realizing the rotatable attachment of the side wings 13 to the backrest 11 is to pivotally connect the lower ends of the side wings 13 to the backrest 11. Therefore, the connecting relationship between the side wings 13 and the backrest 11 is simple, and easy to install and arrange.

[0029] As shown in FIG. 2 to FIG. 6, the driving member 14 is slidably mounted on the backrest 11 so as to enable the headrest 12 to rapidly drive and move the driving member 14. Preferably, in order to enable the driving member 14 to slide more smoothly on the backrest 11, the seat back assembly 10 further includes a guide post 15 disposed at the rear of the backrest 11, and the driving member 14 is slidably fitted on the guide post 15. Preferably, the guide post 15 is disposed on both the left and right sides of the rear of the backrest 11, respectively. The guide post 15 is, for example, but not limited to, a tubular plastic rod or a tubular metal rod, and the driving member 14 is, for example, but not limited to, a tubular plastic member or a tubular metal member. In order to enhance the structural stability of the two guide posts 15, a connecting rod 16 is mounted between the two guide posts 15. In addition, the upper part of the guide post 15 does not exceed the side wing 13 so as to minimize undesirable effects on the appearance of the child car seat 10, and in this embodiment, the upper part of the guide post 15 is, for example, but not limited to, approximately flush with the upper part of the side wing 13. 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 driving member 14 is correspondingly driven to slide on the guide post 15, so that the driving member 14 slides upward directly and quickly together with the headrest 12. It should be noted that in this embodiment, the driving member 14 can be disposed on the headrest 12 by a flexible member. For example, the driving member 14 can be connected to the headrest 12 by a rope or a steel wire. According to actual requirements, the driving member 14 may also be disposed on the headrest 12 by a rigid member. For example, the driving member 14 may be attached to the headrest 12 by a flexible pin. Alternatively, the drive member 14 may be, for example but not limited to, a part of the headrest 12. In other embodiments, the drive member 14 may be further disposed on the backrest 11 as long as it can move together with the headrest 12.Preferably, in this embodiment, when the headrest 12 is in the initial position, the headrest 12 is located close to the backrest 11, in which case the headrest 12 is suitable for, for example, but not limited to, a small child. When the headrest 12 is in the operating position, the headrest 12 is not too far from the backrest 11, in which case the child seat 100 is suitable for, for example, but not limited to, a small to medium sized child. The above operating positions can be adjusted according to the requirements of different applications.

[0030] As shown in FIG. 2 to FIG. 6, when the headrest 12 slides away from the backrest 11 and passes the operating position, the driving member 14 pushes the side wing 13 to unfold it relative to the backrest 11. Therefore, the transmission relationship between the driving member 14 and the side wing 13 is simple and the arrangement is convenient. Specifically, the side wing 13 is provided with a pressing structure 131 protruding in a direction approaching the driving member 14. The headrest 12 drives the side wing 13 to unfold it relative to the backrest 11 by the driving member 14 pressing the pressing structure 131, so that the driving member 14 easily presses the side wing 13 by the pressing structure 131 to unfold it. For example, in this embodiment, the pressing structure 131 is a sheet-like structure. According to actual needs, the pressing structure 131 may be, for example, but not limited to, a block-like structure or a pin-like structure. In order to provide better pressing coordination between the pressed structure 131 and the driving member 14, the driving member 14 is connected to, for example, but not limited to, a pressing part (not shown). It should be noted that the pressing part is located directly below the pressed structure 131, and the pressing part moves together with the driving member 14, and the driving member 14 drives the side wing 13 to deploy by the mutual pressing between the pressing part and the pressed structure 131. Preferably, the pressing part is included in, for example, the driving member 14, but not limited to this. More specifically, when the headrest 12 is in the initial position, the pressed structure 131 is above the driving member 14. The pressed structure 131 is provided with an inclined surface structure 132, and the driving member 14 faces the inclined surface structure 132. The driving member 14 can easily drive the side wing 13 to rotate and deploy through the inclined surface structure 132. According to actual requirements, the inclined surface structure 132 can be disposed on the driving member 14, which can also achieve the purpose of easily driving the rotation and deployment of the side wing 13.

[0031] As shown in Fig. 2 to Fig. 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 the normal use of the side wing 13. To enable the side wing 13 to be automatically folded relative to the backrest 11 in a normal state, the seat back assembly 10 further includes an elastic member 18 disposed between the side wing 13 and the backrest 11, where the elastic member 18 has a tendency to drive the side wing 13 to be always folded 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 protruding structure 172 disposed in the slot structure 171 and slidable in the slot structure 171. The slot structure 171 is disposed in the side wing 13, and the protruding structure 172 is attached to the backrest 11, so that the limiting device 17 has a simple structure and is convenient to be disposed and attached. According to actual requirements, in other embodiments, the slot structure 171 can be disposed in the backrest 11, and the protruding structure 172 can be attached to the side wing 13, so as to achieve the purpose of limiting the width of the folding and unfolding of the side wing 13. For example, but not limited to, the protruding structure 172 is a pin. More specifically, the elastic member 18 is disposed in the rear of the side wing 13, one end of the elastic member 18 is connected to the protruding structure 172, and the other end of the elastic member 18 is connected to the side wing 13. Since the elastic member 18 is disposed at the rear of the side wing 13, it is easy to hide the elastic member 18, and the structure of the seat back assembly 10 becomes more compact. In order 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 protruding 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, but not limited to, a tension spring, a compression spring, or a torsion spring. The extension direction of the slot structure 171 and the movement direction of the driving member 14 are arranged to cross each other so as to allow the side wings 13 to rotate smoothly for unfolding or folding when the protruding structure 172 slides in the slot structure 171.

[0032] The operating principle of the child seat 100 of the present disclosure will be described in combination with FIG. 1 to FIG. 6. To use the child seat 100, the headrest 12 is lifted or pressed downward according to the child's body size so that the headrest 12 corresponds to the child's head. As shown in FIG. 3, when the headrest 12 is in the low position, that is, when the headrest 12 is between the initial position and the operating position, the driving member 14 is away from the pressing structure 131, so the driving member 14 does not press the pressing 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 surrounded by the two side wings 13, the backrest 11, and the seat body 20 is relatively small, and therefore the child seat 100 of the present disclosure is suitable for children with smaller body sizes to sit on. When the headrest 12 is adjusted from a low position to a high position, that is, when the headrest 12 is lifted along the direction F1 in FIG. 3, the headrest 12 drives the driving member 14 to move upward so that the driving member 14 gradually approaches the pressing structure 131. When the headrest 12 reaches the operating position, the driving member 14 presses the inclined surface structure of the pressing structure 131, and the state of the child seat 100 in this case is shown in FIG. 4 and FIG. 5. When the headrest 12 is continuously lifted along the direction F2 in FIG. 4 and FIG. 5, the driving member 14 starts to press the pressing structure 131 when the headrest 12 exceeds the operating position, so that the side wings 13 rotate relative to the backrest 11 and unfold. In this case, the cavity jointly surrounded by the two side wings 13, the backrest 11, and the seat body 20 gradually increases. Meanwhile, the protrusion structure 172 slides within the slot structure 171, and the protrusion structure 172 presses and compresses the elastic member 18. In this case, the state of the child seat 100 becomes as shown in Fig. 6, and the child seat 100 is suitable for a child with a larger body size to sit on.

[0033] When the child seat 100 is no longer in use, the headrest 12 is adjusted to a low position, which moves the driving member 14 away from the pressing structure 131 and restores the elastic member 18 to its original state, which drives the side wings 13 to fold against the backrest 11, thus resetting the child seat 100 of the present disclosure for next use.

[0034] Compared with the prior art, the seat back assembly 10 of the present disclosure further includes a driving member 14 disposed on the headrest 12 and moving together with the headrest 12 relative to the backrest 11. The headrest 12 has at least an initial position close to the backrest 11 and an operating position for driving the side wings 13 to unfold relative to the backrest 11. The side wings 13 are folded onto the backrest 11 when the headrest 12 is located between the initial position and the operating position, and the driving member 14 drives the side wings 13 to unfold relative to the backrest 11 when the headrest 12 is moved away from the backrest 11 beyond the operating position. Thus, when the height of the headrest 12 is adjusted, the headrest 12 can drive the two side wings 13 to unfold via the driving member 14, thereby simultaneously adjusting the width between the two side wings 13 while the headrest 12 is adjusted, providing ease of use and simple operation for children of different body sizes. Meanwhile, since the headrest 12 can be adjusted and the two side wings 13 can be simultaneously driven to deploy by only one driving member 14, the structure of the seat back assembly 10 is significantly simplified.

[0035] It should be noted that the child seat 100 having the seat back assembly 10 of the present disclosure achieves the same technical effect.

[0036] This specification also discloses the following invention.

[0037] (1) A seat back assembly, comprising: With a backrest, A headrest slidably attached to an upper end of the backrest; A side wing is disposed on a side of the backrest and is foldable and deployable relative to the backrest; a drive member disposed on the backrest or the headrest and adapted to move together with the headrest relative to the backrest; The seat back assembly further includes an elastic member disposed between the side wing and the backrest, The deployed side wings are driven by an elastic member to be folded into the backrest when the headrest slides downward, A seat back assembly, characterized in that the folded side wings are pushed by an elastic member and unfolded against the backrest when the headrest slides upward.

[0038] (2) A seat back assembly as described in (1), characterized in that the side wing is rotatably attached to the backrest.

[0039] (3) The seat back assembly described in (1), wherein the drive member is slidably attached to the backrest.

[0040] (4) The seat back assembly described in (1), further comprising a guide post disposed at a rear portion of the backrest, the drive member being slidably fitted onto the guide post.

[0041] (5) The seat back assembly according to (4), wherein the guide post extends in the height direction of the backrest.

[0042] (6) The seat back assembly described in (1), characterized in that the headrest has an operating position that drives the side wings to deploy relative to the backrest, and the drive member drives the side wings to deploy relative to the backrest when the headrest slides away from the backrest and passes the operating position.

[0043] (7) The seat back assembly described in (1), characterized in that the side wing is provided with a pressure-receiving structure that protrudes in a direction toward the drive member, and the headrest drives the side wing to deploy against the backrest through pressure from the drive member against the pressure-receiving structure.

[0044] (8) A seat back assembly as described in (1), characterized in that one of the driving member and the pressed structure is provided with an inclined surface structure, and the other of the driving member and the pressed structure faces the inclined surface structure.

[0045] (9) A seat back assembly as described in (1), characterized in that a limiting device for limiting the width of folding and unfolding of the side wing relative to the backrest is provided between the side wing and the backrest.

[0046] (10) The seat back assembly described in (9), characterized in that the limiting device comprises a slot structure and a protrusion structure disposed within and slidable within the slot structure, the slot structure being disposed in one of the backrest and the side wing, and the protrusion structure being attached to the other of the backrest and the side wing.

[0047] (11) The seat back assembly described in (10), characterized in that the elastic member is arranged at the rear of the side wing, one end of the elastic member is connected to the protrusion structure, and the other end of the elastic member is connected to the side wing.

[0048] (12) The seat back assembly described in (11), characterized in that a stop block is provided at the rear of the side wing, and the other end of the elastic member is connected to the stop block.

[0049] (13) The seat back assembly described in (10), characterized in that the extension direction of the slot structure and the movement direction of the drive member are arranged to intersect.

[0050] The preferred embodiments of the present disclosure have been disclosed above and should not be construed as limitations on the claimed invention. Therefore, all equivalent modifications to the claimed invention should be included within the scope of the present disclosure.

Claims

1. 1. A seat back assembly comprising: With a backrest, A headrest slidably attached to an upper end of the backrest; A side wing is disposed on a side of the backrest and is foldable and deployable relative to the backrest; a drive member disposed on the backrest or the headrest and adapted to move together with the headrest relative to the backrest; The seat back assembly further includes an elastic member disposed between the side wing and the backrest, The deployed side wings are driven by an elastic member to be folded into the backrest when the headrest slides downward, When the headrest slides upward, the folded side wings are pushed by an elastic member and deployed against the backrest. A seat back assembly comprising:

2. The side wings are rotatably attached to the backrest.

2. The seat back assembly of claim 1.

3. The drive member is slidably attached to the backrest.

2. The seat back assembly of claim 1.

4. The seat back further includes a guide post disposed at a rear portion of the seat back, and the driving member is slidably fitted onto the guide post.

2. The seat back assembly of claim 1.

5. The guide post extends in the height direction of the backrest.

5. The seat back assembly of claim 4.

6. The headrest has an operating position that drives the side wings to deploy relative to the backrest, and the drive member drives the side wings to deploy relative to the backrest when the headrest slides away from the backrest and passes the operating position.

2. The seat back assembly of claim 1.

7. The side wing is provided with a pressure-receiving structure that protrudes in a direction approaching the driving member, and the headrest drives the side wing to be deployed relative to the backrest through the pressure of the pressure-receiving structure by the driving member.

2. The seat back assembly of claim 1.

8. One of the driving member and the pressed structure is provided with an inclined surface structure, and the other of the driving member and the pressed structure faces the inclined surface structure.

2. The seat back assembly of claim 1.

9. A limiting device is provided between the side wing and the backrest for limiting the width of folding and unfolding of the side wing relative to the backrest.

2. The seat back assembly of claim 1.

10. the limiting device comprises a slot structure and a protrusion structure disposed within and slidable within the slot structure, the slot structure being disposed on one of the backrest and the side wing, and the protrusion structure being attached to the other of the backrest and the side wing; 10. The seat back assembly of claim 9.

11. The elastic member is disposed at the rear of the side wing, one end of the elastic member is connected to the protruding structure, and the other end of the elastic member is connected to the side wing.

11. The seat back assembly of claim 10.

12. A stop block is provided at the rear of the side wing, and the other end of the elastic member is connected to the stop block.

12. The seat back assembly of claim 11.

13. The extension direction of the slot structure and the movement direction of the drive member are arranged to intersect.

11. The seat back assembly of claim 10.

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