JPH0555945U - Seat back - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] The weight of the seat back as a whole is reduced by devising the means for tensioning the cushion spring that supports the cushion pad from behind. [Structure] Retaining portions 13a, 13b ... At the spring ends are integrally formed on a resin-molded backboard body 11, and the cushion springs 12, 12 ... Are stretched on the backboard body 11 by the retaining portions 13a, 13b. Then, the backboard body 11 is attached to the seatback frame 10 and the cushion pad 16 assembled to the seatback frame 10 is supported from behind by the cushion springs 12 and 12.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention mainly relates to an improvement for the purpose of reducing the weight of a seat back mounted on an automobile.

[0002]

[Prior Art]

 Conventionally, when assembling an automobile sheet, a cushion spring is formed by fixing both spring ends to vertical frames 1a and 1b at a vertical interval of the seat back frame 1 as shown in FIG. A seat back frame 1 in which a plurality of 2, 2, ... Is stretched is used. In order to fix the spring ends of the cushion springs 2, 2 ... To the vertical frames 1a, 1b, the metal retainers 3a, 3b ... Which insert and hold the spring ends are used, and the retainers 3a, 3b. It is performed by separately mounting the vertical frames 1a and 1b separately.

Considering the weight reduction of the seat back frame 1, the retainers 3a, 3b ... Are made of metal and a plurality of retainers 3a. This is one of the factors that increase the weight, and it is not preferable from the standpoint of assembling workability of the seat because each of them must be individually attached to the vertical frames 1a and 1b.

[0004]

[Problems to be solved by the device]

 An object of the present invention is to provide a seat back in which the tension position of the cushion spring is creatively devised in order to reduce the weight of the seat by omitting the metal retainer for tensioning the cushion spring.

[0005]

[Means for Solving the Problems]

 In the seat back according to the present invention, a pair of left and right hooking portions for holding the spring ends are integrally formed on the inner surface of the backboard body formed of a relatively hard synthetic resin at upper and lower fixed intervals. The cushion spring is stretched on the backboard body at each hooking part, and this backboard body is attached to the seat back frame to attach the cushion pad to the seat back frame. It is configured to be supported from behind by a cushion spring stretched on the board body.

[0006]

[Action]

 In this seat back, the latching part that inserts and holds the spring end of the cushion spring is provided integrally with the backboard body by resin molding, so that the cushion spring supporting the cushion pad from behind is stretched on the backboard body. Not only can the weight of the latching portion be molded with resin, but also the workability of assembling can be improved because the work of separately attaching the members for inserting and holding the spring ends can be omitted.

[0007]

【Example】

 FIG. 1 shows a seat back frame 10 for a seat back and a back board main body 11 in an unfolded state. In a seat back seat back assembled by using these, a cushion spring for supporting a cushion pad from behind as described later. 12, 12 ... A plurality of zigzag springs are stretched in parallel on the backboard body 11.

The seat back frame 10 includes a main frame 10a having a substantially quadrilateral shape, a horizontal beam plate 10b suspended and fixed on an upper side of a vertical frame of the main frame 10a, and a side for mounting a reclining mechanism attached to one vertical frame. It comprises a plate 10c and backboard fixing bracket pieces 10d, 10d ... Which are fixed upright on the lower frame of the main frame 10a at intervals.

The backboard body 11 is made of a hard polypropylene resin having a relatively high rigidity and is molded into a substantially pan shape, and both spring ends of the cushion springs 12, 12 ... A pair of left and right hooking portions 13a, 13b, ... Are integrally molded in a plurality of pairs at vertical intervals. The latching portions 13a, 13b, ... May be formed in the shape of a projecting piece in which a spring end insertion hole is provided substantially in the center of the plate surface, or a spring end engaging notch is provided on the outer edge. In addition to the latch portions 13a, 13b ... Of the spring ends, hook portions 14, 14 ... And bolt insertion holes 15, 15 ... for attaching the backboard itself to the seat back frame 10 are provided in the backboard body 11. It is divided into upper and lower parts, and they are provided on the board.

The backboard body 11 has a plurality of cushion springs 12, 12 ... Spaced by retaining the spring ends through resin-molded latching portions 13a, 13b. Multiple pieces are stretched in parallel with each other. Since the hooking portions 13a, 13b at the spring ends are integrally formed with the backboard main body 11 by a hard synthetic resin, they can be sufficiently counteracted against the pulling force by the cushion panels 12, 12.

The backboard main body 11 engages the hook portions 14, 14 ... With the transverse beam plate 10b of the seat back frame 10 from the lower side, and the bolt insertion holes 15, 15 provided in the lower portion of the backboard main body 11 The bracket pieces 10d, 10d of the seatback frame 10 are bolted with tightening bolts (not shown) inserted into the seatback frame 10 to be attached to the seatback frame 10. Note that instead of the hook portions 14, 14, ..., The upper side of the backboard body 11 may be bolted and fixed.

As shown in FIG. 2, the backboard body 11 is assembled so that a cushion pad 16 assembled to the seatback frame 10 is supported from behind by cushion springs 12, 12, .... With the cushion springs 12, 12, ..., The supporting surface of the cushion pad 16 can be sufficiently secured by the rising dimension of the hooking portions 13a, 13b.

The seat back board main body 11 is a back cover that covers the cushion pad 16 assembled to the seat back frame 10 with a seat skin (not shown) without a spine, and then conceals the spine removal part of the seat skin. Can be installed as. In this case, the backboard body 11 is used as a base material, and a covering material such as a wadding cover is attached to the outer surface of the backboard body 11. Further, the seat back frame 10 and the cushion pad 16 as well as the back board body 11 are wholly covered with the seat cover, so that the seat back can be assembled as an interior board.

In the seat back configured as described above, the cushion springs 12, 12 for supporting the cushion pad 16 from behind are provided integrally with the resin-molded backboard body 11 and the latch portions 13a, 13b, ... Since the ... Is stretched on the backboard main body 11, a heavy fastener such as a retainer used for the tension can be omitted. Therefore, not only the weight of the seat back as a whole can be reduced, but also the hooking portions 13a, 13b, ... At each spring end are integrally formed with the backboard main body 11, so that the cushion spring stoppers can be separately provided. The time and effort to install can be saved.

[0015]

[Effect of the device]

 As described above, according to the seat back according to the present invention, the overall weight can be reduced and the tensioning work of the cushion spring can be simplified.

[Brief description of drawings]

FIG. 1 is an exploded view showing a seatback frame and a backboard body used for assembling a seatback according to the present invention.

FIG. 2 is an explanatory view showing a state where a cushion pad is attached to the seat back frame and the backboard body of FIG.

FIG. 3 is an explanatory view showing a seatback frame used for assembling a seatback according to a conventional example.

[Explanation of symbols]

 10 Seat back frame 11 Back board main body 12, 12 ... Cushion springs 13a, 13b ... Spring end latching portion 16 Cushion pad

Claims (1)

[Scope of utility model registration request] 1. A pair of left and right hooking portions for inserting and holding a spring end are integrally formed on the inner surface side of a backboard main body formed of a relatively hard synthetic resin at a fixed upper and lower intervals. A cushion spring is stretched on the backboard main body at the latching part, and this backboard main body is attached to the seat back frame, and a cushion pad that is assembled to the seat back frame is stretched on the backboard main body. A seat back characterized by being assembled so as to be supported from behind by a cushion spring that has been created.