Seat back

Abstract

To provide a seat back that allows for a simplified fixing structure for the backboard. [Solution] The seat back 1 has a back pad 3 supported by a back frame 2 and a back board 4 that covers the back of the back pad 3, and has a wire 3C as an engaging member that is integrated with the back pad 3 when the back pad 3 is foamed, and a C-ring R as an engaged member that is attached to the back board 4 and fixes the back board 4 to the back pad 3 by engaging with the wire 3C.

Description

Technical Field

[0001] The present invention relates to a seat back. More specifically, it relates to a seat back having a back pad supported by a back frame and a back board covering the back surface of the back pad.

Background Art

[0002] Patent Document 1 discloses a configuration in which a resin back board is attached to the back of a seat back. The back board is fixed to a back frame that forms the skeleton of the seat back. Specifically, the back board is fixed to the back frame by clips at various locations.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the configuration described in Patent Document 1, when the back frame does not extend to the location where the back board is to be fixed, it is necessary to weld fixing wires or brackets to the back frame, which causes an increase in cost and weight. Therefore, the present invention provides a seat back capable of simplifying the fixing structure of the back board.

Means for Solving the Problems

[0005] As means for solving the above problems, the seat back of the present invention takes the following means.

[0006] In other words, the first invention of the present invention is a seat back having a back pad supported by a back frame and a back board covering the back of the back pad, wherein the seat back has an engaging member that is integrated with the back pad during foam molding of the back pad and an engaged member that is attached to the back board and fixes the back board to the back pad by engaging with the engaging member.

[0007] According to the first invention, the backboard can be fixed in a state that covers the back of the back pad without welding wires or brackets to the back frame for fixing the backboard. As a result, the fixing structure of the backboard can be simplified.

[0008] The second invention of the present invention is a seat back in which, in the first invention described above, the engaging member is a wire extending along the back surface of the back pad.

[0009] According to the second invention, by making the engaging member a wire that extends along the back of the back pad, the backboard can be properly fixed over a wide area along the back of the back pad. Since the wire is not welded to the frame, a wire with a thin diameter that would be unsuitable for welding can be used, thereby simplifying the structure and reducing weight.

[0010] The third invention of the present invention is a seat back in which, in the second invention described above, the wire is provided in two vertical and horizontal directions so as to extend along the back pad in a cross shape when viewed from the rear.

[0011] According to the third invention, by arranging the wires in a cross shape, the backboard can be fixed in a properly positioned state over a wide area in the vertical and horizontal directions along the back of the back pad.

[0012] The fourth invention of the present invention is a seat back in any of the first to third inventions, wherein the back pad comprises a pad body made of foam and a backing material provided so as to be integrated along the back surface of the pad body during foam molding of the pad body.

[0013] According to the fourth invention, the surface rigidity of the back of the back pad can be increased by the back material. As a result, the backboard can be fixed to the back pad with appropriate fixing strength.

[0014] The fifth invention of the present invention is a seat back in any of the first to third inventions described above, wherein the backboard is applied to the back frame from the rear side by engagement between the engaged member and the engaging member.

[0015] According to the fifth invention, the backboard can be properly positioned and fixed in place so as to be pressed against the back frame from the rear side by the elastic force of the back pad.

[0016] The sixth invention of the present invention is a seat back that further comprises a back cover that surrounds the back pad and the back board, in any of the first to third inventions described above.

[0017] According to the sixth invention, when the engaged member of the backboard is exposed on the back of the backboard, the engaged member can be properly covered by the back cover. Therefore, the backboard can be more properly fixed to the back pad. [Brief explanation of the drawing]

[0018] [Figure 1] This is a perspective view of the seat back according to the first embodiment. [Figure 2] This is a rear view of the seatback. [Figure 3] This is a disassembled perspective view of the seat back. [Figure 4] This is a cross-sectional view taken along line IV-IV in Figure 2.

Mode for Carrying Out the Invention

[0019] Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

[0020] 《First Embodiment》 (Schematic Configuration of Seat Back 1) First, the configuration of the seat back 1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4. In the following description, when indicating directions such as front, rear, up, down, left, and right, the respective directions shown in each figure shall be referred to. The directions shown in each figure are the directions as seen from the seated occupant using the seat back 1. Also, when indicating each direction with "seat" such as "seat width direction", the respective directions based on the seat back 1 shall be referred to.

[0021] As shown in FIGS. 1 to 2, the seat back 1 according to the present embodiment is configured as the backrest of a single-seat mounted in an automobile. As shown in FIGS. 3 to 4, the seat back 1 has a metal back frame 2 forming its internal framework and a back pad 3 made of foamed urethane forming a cushion material.

[0022] ]] The seat back 1 also has a resin back board 4 covering the back surface of the back pad 3 and a fabric back cover 5 (see FIG. 4) covering so as to surround the back pad 3 and the back board 4. The back cover 5 may be made of leather material in addition to fabric. In FIGS. 1 to 2, the back cover 5 is shown in thin lines for convenience in visualizing the internal structure of the seat back 1.

[0023] As shown in FIG. 3, the back frame 2 has a pipe frame 2A assembled in a frame shape when viewed from the back and a pair of side frames 2B coupled to the left and right frame side portions of the pipe frame 2A. The pipe frame 2A forms a framework along the upper, lower, left, and right peripheral edges of the seat back 1.

[0024] The back pad 3 is assembled to the back frame 2 so as to cover it from the front of the seat. The back pad 3 is shaped so that its top, bottom, left, and right edges protrude outwards from the rear of the seat, covering the back frame 2 from the outer periphery.

[0025] The back pad 3 comprises a pad body 3A made of foamed urethane and a non-woven fabric backing material 3B integrated along the back of the pad body 3A. The back pad 3 also has two wires 3C embedded along the back of the pad body 3A, extending vertically and horizontally in a cross shape.

[0026] The backing material 3B and each wire 3C are set in a mold (not shown) during the foam molding of the back pad 3 and molded together with the pad body 3A. As a result, the backing material 3B is molded in a state where the foam resin raw material is impregnated inside and hardened as the pad body 3A is foam molded. Consequently, the backing material 3B is molded to form a layer that is harder than the pad body 3A, along the back of the pad body 3A.

[0027] The backing material 3B is a functional component that improves the sliding of the back of the back pad 3 and suppresses the generation of abnormal noises caused by the back pad 3 rubbing against the back frame 2. The backing material 3B is provided over most of the area of ​​the back pad 3, including the area that contacts the back frame 2. Specifically, the backing material 3B has a shape with a cross-shaped cut extending vertically and horizontally in the center, so that it is provided except in the area where the two wires 3C of the pad body 3A are located.

[0028] Each wire 3C is provided such that one end extends vertically through approximately the center of the pad body 3A in the seat width direction, and the other end extends horizontally through approximately the center of the pad body 3A in the seat height direction. Each wire 3C is provided in such a state that parts of it are exposed to the rear of the seat by cross-shaped grooves 3D formed on the back surface of the pad body 3A along these wires.

[0029] In other words, each wire 3C is provided embedded in the pad body 3A, with some parts exposed to the rear of the seat from the groove 3D, and the remaining parts bulging into the groove 3D. Each wire 3C is embedded in the pad body 3A so as to be exposed to the outside from the groove 3D, without protruding from the back of the pad body 3A.

[0030] The backboard 4 is made up of a single resin plate that forms a rectangular shape when viewed from the rear. Specifically, the backboard 4 consists of a flat resin plate that has a wider width and height than the pipe frame 2A described above.

[0031] The backboard 4 is fixed to the back pad 3 by crimping C-rings R to each wire 3C embedded in the back pad 3 at four locations on the top, bottom, left, and right sides of the middle section of the board. Here, each wire 3C corresponds to the "engaging member" of the present invention, and each C-ring R corresponds to the "engaged member" of the present invention.

[0032] Specifically, the backboard 4 has four through-holes 4A formed in four locations (top, bottom, left, and right) along the two wires 3C provided in the pad body 3A. These holes allow C-rings R to be inserted from the rear of the seat and crimped onto each wire 3C. The backboard 4 is fixed to the back pad 3 in a manner that covers its back by inserting the C-rings R through each through-hole 4A using a hog ringer (not shown) and crimping them onto the corresponding wires 3C in a ring shape.

[0033] As a result, the backboard 4 is fixed in a position relative to the back pad 3 in the seat height direction and the seat width direction. Specifically, as shown in Figure 4, the backboard 4 is set so that its top, bottom, left, and right peripheral edges are in contact with the back frame 2 from the rear side.

[0034] As a result, the backboard 4 is set in a state where it is sandwiched between the back frame 2 and the back pad 3 in the front-to-back direction of the seat by the elastic force exerted by the back pad 3. More specifically, the backboard 4 is set in a state where it is properly pressed against the back frame 2, while the elastic force of the back pad 3, whose surface rigidity is enhanced by the integration of the back surface material 3B, ensures appropriate fixing strength to the back pad 3.

[0035] As a result, the backboard 4 is fixed in a manner that minimizes rattling between the back pad 3 and the back frame 2. Alternatively, the backboard 4 may be secured to each wire 3C by cable ties (not shown) instead of the C-rings R.

[0036] The back cover 5 is sewn into a bag shape that opens downwards. The back cover 5 is placed over the back pad 3 and back board 4, which are assembled to the back frame 2, from above the seat, completely surrounding them.

[0037] The back cover 5 is configured such that its rear cover piece can be opened and closed relative to the cover pieces on both sides by linear fasteners (not shown). After the back cover 5 is placed over the back pad 3 and back board 4 so as to enclose them, the linear fasteners are closed to create a tight, wide, and tight fit over the entire outer surface of these components.

[0038] As a result, the backboard 4 is more securely fixed in place, making proper contact with the back pad 3 and back frame 2 from the rear. Furthermore, the tensioning of the back cover 5 protects each C-ring R that secures the backboard 4 to the back pad 3, preventing them from being visible from the outside or being detached from the outside. In this way, the backboard 4 is not directly fixed to the back frame 2, but is fixed only to the back pad 3.

[0039] In summary, the seat back 1 according to this embodiment has the following configuration. The reference numerals in parentheses below correspond to the respective configurations shown in the above embodiment.

[0040] In other words, the seat back (1) includes a back pad (3) supported by a back frame (2) and a backboard (4) that covers the back of the back pad (3). The seat back (1) also includes an engaging member (3C) that is integrated with the back pad (3) during foam molding, and an engaged member (R) that is attached to the backboard (4) and fixes the backboard (4) to the back pad (3) by engaging with the engaging member (3C).

[0041] With the above configuration, the backboard (4) can be fixed to the back frame (2) in a manner that covers the back of the back pad (3) without welding wires or brackets to the backboard (4). As a result, the fixing structure of the backboard (4) can be simplified.

[0042] Furthermore, the engaging member (3C) is a wire (3C) that extends along the back surface of the back pad (3). By making the engaging member (3C) a wire (3C) that extends along the back surface of the back pad (3), the backboard (4) can be properly fixed over a wide area along the back surface of the back pad (3). Since the wire (3C) is not welded to the frame, a wire with a thin diameter that would be unsuitable for welding can be used, thereby simplifying the structure and reducing weight.

[0043] Furthermore, two wires (3C) are provided, one vertical and one horizontal, so as to extend along the back pad (3) in a cross shape when viewed from the rear. By arranging the wires (3C) in a cross shape in this way, the backboard (4) can be properly positioned and fixed over a wide area in the vertical and horizontal directions along the back of the back pad (3).

[0044] Furthermore, the back pad (3) comprises a pad body (3A) made of foam and a backing material (3B) that is provided so as to be integrated along the back surface of the pad body (3A) during the foam molding process. With this configuration, the backing material (3B) can increase the surface rigidity of the back surface of the back pad (3). As a result, the backboard (4) can be fixed to the back pad (3) with appropriate fixing strength.

[0045] Furthermore, the backboard (4) is pressed against the back frame (2) from the rear side by the engagement of the engaged member (R) and the engaging member (3C). With the above configuration, the backboard (4) can be appropriately positioned and fixed so as to be pressed against the back frame (2) from the rear side by the elastic force of the back pad (3).

[0046] Furthermore, the seat back (1) has a back cover (5) that is fitted over the back pad (3) and the backboard (4) so ​​as to surround them. With the above configuration, when the engaged member (R) of the backboard (4) is exposed on the back surface of the backboard (4), the engaged member (R) can be properly covered by the back cover (5). Therefore, the backboard (4) can be more properly fixed to the back pad (3).

[0047] Regarding other embodiments: Although the embodiments of the present invention have been described above using one embodiment, the present invention can be implemented in various forms other than those described above.

[0048] 1. The seat back of the present invention is applicable not only to automobile seats but also to seats used in other vehicles such as trains, aircraft, and ships. Furthermore, the seat back is applicable to seats used in vehicles other than automobiles. In addition, the seat back is applicable not only to single-seater separate seats but also to bench seats that can accommodate two or more people.

[0049] 2. The combination of the engaging member integrated with the back pad and the engaged member attached to the backboard and engaged with the engaging member is not limited to the combination shown in the above embodiment. For example, if the engaging member integrated with the back pad is a wire as shown in the above embodiment, the engaged member attached to the backboard may be a clip that is mounted on a seat formed in the backboard and snap-fitted to the wire.

[0050] Furthermore, the wire (engaging member) integrated into the back pad may function as a wire to secure the backboard from the back side, in addition to the suspension wire embedded in the back pad to suspend the back cover from the front side. The wire may be made of metal or resin.

[0051] Furthermore, the engaging member integrated with the back pad may be provided with a pair of through-holes in the backing material integrated with the back of the pad body, thereby securing the back board by fastening a C-ring crimp or cable tie through the corresponding through-hole formed in the backboard.

[0052] Alternatively, the engaged member attached to the backboard may be a wire extending along the backboard, and the engaging member integrated with the back pad may be a suspension device embedded inside the pad, with the wire being hooked onto the suspension device for fastening. Alternatively, both the engaged member attached to the backboard and the engaging member integrated with the back pad may be wires, and these may be crimped and fixed with a C-ring.

[0053] The wire (engaging member) integrated into the back pad may be completely embedded inside the pad, and when the C-ring is crimped, the pad body may be gouged out to allow it to be crimped with the C-ring. Alternatively, the wire integrated into the back pad may be partially exposed, protruding from the back of the pad.

[0054] 3. The backboard does not necessarily have to be completely covered from the rear by the back cover; it may be configured so that part or all of it is not covered by the back cover and is exposed to the outside. Furthermore, the backboard may be fixed to the back pad so as not to come into contact with the back frame from the rear. [Explanation of Symbols]

[0055] 1 seat back 2 Backframes 2A Pipe Frame 2B Side Frame 3 Back pads 3A Pad Body 3B Back material 3C wire (engaging member) 3D groove 4 Backboard 4A Through-hole 5 Back cover RC ring (engaged member)

Claims

1. A seat back comprising a back pad supported by a back frame and a backboard covering the back of the back pad, An engaging member that is integrated with the back pad during foam molding of the back pad, A seat back having an engaged member attached to the backboard and which fixes the backboard to the back pad by engaging with the engaging member.

2. A seat back according to claim 1, A seat back in which the engaging member is a wire extending along the back surface of the back pad.

3. A seat back according to claim 2, The aforementioned wires are provided in two vertical and horizontal configurations along the back pad so as to extend in a cross shape when viewed from the rear, in a seat back.

4. A seat back according to any one of claims 1 to 3, The seat back has a back pad comprising a pad body made of foam and a backing material provided to be integrated along the back surface of the pad body during foam molding.

5. A seat back according to any one of claims 1 to 3, The backboard is a seat back that is pressed against the back frame from the rear side by the engagement of the engaged member and the engaging member.

6. A seat back according to any one of claims 1 to 3, A seat back further having a back cover that covers the back pad and the back board so as to surround them.

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