Child seat backrest

Abstract

The utility model discloses a child seat backrest which comprises a back plate serving as a backrest support of a human body, a pair of supporting plates are further arranged between the human body and the back plate, an elastic assembly is arranged between each supporting plate and the back plate, the two supporting plates are located on the two sides of the center line of the back plate respectively, and preferably, the two supporting plates are symmetrically arranged. In order to achieve comfort, the surfaces of the two supporting plates are covered with cloth. When a child sits on the backrest of the seat, the two supporting plates jointly support the human body, when the child inclines to one side of the seat, the elastic assembly where the pressed supporting plate is located can elastically deform, and when the back of the child is wide, the two supporting plates can be separated towards the two sides of the seat through the elastic assemblies of the two supporting plates. By arranging the two symmetrical supporting plates and the elastic assembly behind the supporting plates, a fluffy material can be replaced for buffering, and compared with a buffering structure made of the fluffy material, the buffering structure composed of hardware can protect skeletal development of children.

Description

Technical Field

[0001] The invention belongs to the field of seats, and in particular relates to a child seat backrest. Background Art

[0002] In the prior art, the backrest of the child seat is usually made of plastic, foam material or fabric to provide necessary support and comfort. These backrests generally include a fixed support frame, an adjustment device and a buffer layer.

[0003] For example, a common backrest support part is disclosed in a Chinese patent with publication number CN221437818U and invention name “child seat”.

[0004] A Chinese patent with publication number CN108248464B and invention name “a space-saving child seat for a car” discloses a soft vehicle seat and a soft child seat.

[0005] Traditional designs often have several disadvantages: first, the fixed support structure may not be able to adapt to the growth needs of children of different ages, resulting in inconvenience in adjustment; second, the fluffy material cushioning layer of the backrest may lose its elasticity over time, affecting comfort and protection performance, and thirdly, it cannot adapt to the back widths of children of different ages. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a child seat backrest which does not rely on fluffy materials to provide elasticity and can adapt to different back widths of children in view of the current status of the above-mentioned prior art.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: a child seat backrest, including a backboard as a backrest support for a human body, a pair of support plates between the human body and the backboard, an elastic component between each support plate and the backboard, and the two support plates are located on both sides of the center line of the backboard. Preferably, the two support plates are symmetrically arranged. For comfort, the surfaces of the two support plates are covered with cloth. When the child is sitting on the seat backrest, the two support plates jointly support the human body. When the child leans to one side of the seat, the elastic component where the compressed support plate is located can make elastic deformation. When the child's back is wider, the two support plates will separate to both sides of the seat by their respective elastic components.

[0008] In a preferred embodiment, the elastic component includes a first elastic unit close to the center line of the back plate and a second elastic unit far from the center line of the back plate. When a child is sitting on the seat back, the two first elastic units play a major supporting role, and the two second elastic units are subjected to less force than the first elastic units, so that the support plate can be tilted toward the human body around the center line of the back plate, further preventing the child from turning to the sides.

[0009] In a preferred embodiment, the first elastic unit includes a first base fixed on the support plate, a second base fixed on the back plate, and a pair of first springs connecting the first base and the second base; the second elastic unit includes a third base fixed on the support plate, a fourth base fixed on the back plate, and a pair of second springs connecting the third base and the fourth base.

[0010] In a preferred solution, a seat ridge is provided between the two support plates, a guide protrusion is provided on the seat ridge, and a slide groove is provided on the back plate for the guide protrusion to slide up and down. The guide protrusion slides up and down in the slide groove to raise or lower the seat ridge. The seat ridge can prevent the two support plates from touching each other.

[0011] In a preferred solution, a wave-shaped contact portion is provided between the slide groove and the guide protrusion, respectively, and the wave-shaped contact portion can increase the sense of stagnation when the seat ridge rises or falls.

[0012] In a preferred solution, the seat ridge is provided with a guide groove arranged along the length direction of the slide groove, and the back plate is provided with a bolt hooked on the edge of the guide groove. The bolt can prevent the guide protrusion from detaching from the slide groove.

[0013] In a preferred solution, the seat spine is provided with a pillow, which is located between the human body and the support plate. The pillow can prevent the two support plates from clamping the head during movement, and can also prevent the two support plates from falling off.

[0014] In a preferred solution, the support plate is provided with a first step surface facing the back plate and pressing against the guide protrusion; the support plate is also provided with a second step surface facing the human body and pressing against the guide protrusion. The first step can separate the guide protrusion from the human body to prevent the movable guide protrusion from touching the human body, and the second step surface can prevent the seat ridge from moving away from the position between the two support plates toward the back plate.

[0015] In a preferred solution, the support plate includes an inwardly turned arc portion, which can further limit the child from tipping over to the sides of the seat.

[0016] In a preferred embodiment, the axes of the first spring and the second spring are not parallel, one end of the second spring faces the inner side of the center axis of the seat, and the other end faces the outer side, that is, the second spring is tilted toward the human body so as to withstand the maximum pressure.

[0017] In summary, the utility model can not only replace the fluffy material as a buffer by setting two symmetrical support plates and the elastic component behind them, but also adapt to different back widths of children by pushing the two support plates apart. Compared with the buffer structure made of fluffy material, this buffer structure composed of hardware can protect the bone development of children. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a front structural schematic diagram of the first embodiment;

[0019] Figure 2 is a schematic diagram of the back structure of the first embodiment;

[0020] Figure 3 yes Figure 2 Schematic diagram of the decomposition of

[0021] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure of the middle part A;

[0022] Figure 5 yes Figure 4 Schematic diagram of the decomposition of

[0023] Figure 6 is a structural diagram of Embodiment 2;

[0024] Figure 7 yes Figure 6 Schematic diagram of the decomposition of

[0025] Figure 8 is an exploded schematic diagram of the second step surfaces and the seat ridges on the two support plates in the second embodiment;

[0026] Fig. 9 It is a schematic diagram of the first step surface and the seat ridge on the two support plates in the second embodiment. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0028] The figures are marked as follows: first elastic unit 1, second base 11, first spring 12, first base 13, second elastic unit 2, fourth base 21, second spring 22, third base 23, support plate 3, arc portion 31, first step surface 32, second step surface 33, back plate 4, slide groove 41, bolt 42, seat ridge 5, pillow 6, guide protrusion 7, guide groove 71, wavy contact portion 8.

[0029] The technical solution of the present utility model is described below through four embodiments, and the directional words such as "rising" and "descending" in the text are described based on the spatial state when the child seat is normally placed. Embodiment 1

[0030] like Figures 1 to 5As shown, a child seat backrest includes a backboard 4 as a backrest support for a human body, a pair of support plates 3 are provided between the human body and the backboard 4, an elastic component is provided between each support plate 3 and the backboard 4, and the two support plates 3 are located on both sides of the center line of the backboard 4. Preferably, the two support plates 3 are symmetrically arranged. For comfort, the surfaces of the two support plates 3 are covered with cloth. When a child is sitting on the seat backrest, the two support plates 3 support the human body together. When the child leans to one side of the seat, the elastic component where the compressed support plate 3 is located can make elastic deformation. When the child's back is wider, the two support plates 3 will separate to both sides of the seat by their respective elastic components.

[0031] In the embodiment, Figure 4 As shown, the elastic assembly includes a first elastic unit 1 close to the center line of the back plate 4 and a second elastic unit 2 far from the center line of the back plate 4. When a child is sitting on the seat back, the two first elastic units 1 play a major supporting role, and the two second elastic units 2 are subjected to less force than the first elastic units 1, so that the support plate 3 can be tilted toward the human body around the center line of the back plate 4, further preventing the child from turning to the sides.

[0032] In the embodiment, Figure 5 As shown, the first elastic unit 1 includes a first base 13 fixed on the support plate 3, a second base 11 fixed on the back plate 4, and a pair of first springs 12 connecting the first base 13 and the second base 11; the second elastic unit 2 includes a third base 23 fixed on the support plate 3, a fourth base 21 fixed on the back plate 4, and a pair of second springs 22 connecting the third base 23 and the fourth base 21. Embodiment 2

[0033] like Figures 6 to 9 As shown, the second embodiment adds technical features on the basis of the first embodiment, a seat ridge 5 is provided between the two support plates 3, the seat ridge 5 is provided with a guide protrusion 7, and a slide groove 41 for the guide protrusion 7 to slide up and down is provided on the back plate 4, as shown in FIG. Figure 7 The guide protrusion 7 slides up and down in the slide groove 41 to raise or lower the seat ridge 5. The seat ridge 5 can prevent the two support plates 3 from touching each other.

[0034] In the embodiment, Figure 7 As shown, a wave-shaped contact portion 8 is provided between the slide groove 41 and the guide protrusion 7, respectively, and the wave-shaped contact portion 8 can increase the sticking feeling when the seat ridge 5 rises or falls.

[0035] In the embodiment, Figure 7 As shown, the seat ridge 5 is provided with a guide groove 71 arranged along the length direction of the slide groove 41, and the back plate 4 is provided with a bolt 42 hooked on the edge of the guide groove 71. The bolt 42 can prevent the guide protrusion 7 from being separated from the slide groove 41.

[0036] In the embodiment, Figures 6 to 9 As shown, the seat spine 5 is provided with a pillow 6, which is located between the human body and the support plate 3. The pillow 6 can prevent the two support plates 3 from clamping the head during the movement, and can also prevent the two support plates 3 from falling off.

[0037] In the embodiment, Fig. 9 As shown, the support plate 3 is provided with a first step surface 32 facing the back plate 4 and resting on the guide protrusion 7; Figure 8 As shown, the support plate 3 is further provided with a second step surface 33 facing the human body and resting on the guide protrusion 7. The first step can separate the guide protrusion 7 and the human body to prevent the movable guide protrusion 7 from touching the human body, and the second step surface 33 can prevent the seat ridge 5 from moving away from the position between the two support plates 3 in the direction of the back plate 4.

[0038] In the first and second embodiments, the first spring 12 and the second spring 22 are parallel. Embodiment 3

[0039] The structure of the third embodiment is similar to that of the first embodiment, the only difference being that the axes of the first spring 12 and the second spring 22 are not parallel, one end of the second spring 22 faces the inner side of the center axis of the seat, and the other end faces the outer side. That is, the second spring 22 is tilted toward the human body so as to withstand the maximum pressure.

[0040] In the first to third embodiments, the support plate 3 includes an inwardly turned arc portion 31. The arc portion 31 can further restrict the child from tipping over to the sides of the seat. Embodiment 4

[0041] The structure of the fourth embodiment is similar to that of the first embodiment, except that the elastic component is a leaf spring connected between the support plate 3 and the back plate 4 .

[0042] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A child seat backrest, comprising a backboard (4) as a backrest support, characterized in that: A pair of support plates (3) are provided between the human body and the back plate (4), an elastic component is provided between each support plate (3) and the back plate (4), and the two support plates (3) are located on both sides of the midline of the back plate (4).

2. A child seat backrest according to claim 1, characterized in that: The elastic component comprises a first elastic unit (1) close to the center line of the back plate (4) and a second elastic unit (2) far from the center line of the back plate (4).

3. A child seat backrest according to claim 2, characterized in that: The first elastic unit (1) comprises a first base (13) fixed on the support plate (3), a second base (11) fixed on the back plate (4), and a pair of first springs (12) connecting the first base (13) and the second base (11); the second elastic unit (2) comprises a third base (23) fixed on the support plate (3), a fourth base (21) fixed on the back plate (4), and a pair of second springs (22) connecting the third base (23) and the fourth base (21).

4. A child seat backrest according to claim 3, characterized in that: A seat ridge (5) is arranged between the two support plates (3), a guide protrusion (7) is arranged on the seat ridge (5), and a slide groove (41) for the guide protrusion (7) to slide up and down is arranged on the back plate (4).

5. A child seat backrest according to claim 4, characterized in that: A wavy contact portion (8) is provided between the slide groove (41) and the guide protrusion (7).

6. A child seat backrest according to claim 5, characterized in that: The seat ridge (5) is provided with a guide groove (71) arranged along the length direction of the slide groove (41), and the back plate (4) is provided with a bolt (42) hooked on the edge of the guide groove (71).

7. A child seat backrest according to claim 6, characterized in that: The seat ridge (5) is provided with a pillow (6), and the pillow (6) is located between the human body and the support plate (3).

8. The child seat backrest according to claim 7, characterized in that: The support plate (3) is provided with a first step surface (32) facing the back plate (4) and pressing against the guide protrusion (7); the support plate (3) is also provided with a second step surface (33) facing the human body and pressing against the guide protrusion (7).

9. The child seat backrest according to claim 8, characterized in that: The support plate (3) comprises an inwardly turned arc-shaped portion (31).

10. The child seat backrest according to claim 9, characterized in that: The axes of the first spring (12) and the second spring (22) are not parallel, and one end of the second spring (22) faces the inside of the center axis of the seat, and the other end faces the outside.

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