JPH11169259A - Frame structure of seat back - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the comfortableness of sitting by providing one support wire with bent part on a frame body, and supporting the upper part of a pad by this support wire. SOLUTION: One support wire 1 is formed of bent parts 10 provided under a pair of support cylinders 20 and bent in down U-shape for hooking a backboard 4, and linear parts 11 provided between the lateral bent parts 10 and outside of the lateral bent parts 10 to prevent the deformation of a pad. Such a support wire 1 is horizontally erected in the upper part of a frame body 2, and both ends of the support wire 1 are welded to the frame body 2. According to this, since the number of part items can be reduced to reduce the number of welding and the weight, the deflection is longitudinally increased, so that a seat back with satisfactory cushioning property in the upper part of the seat back and satisfactory comfortableness of sitting can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame structure constituting a seat back (backrest) of an automobile seat (seat).

[0002]

2. Description of the Related Art A vehicle seat, for example, a front seat has a headrest provided on a seat back, and a frame of the seat back has a structure as shown in FIG.

In FIG. 5, (HD) denotes a headrest, and stays (S) and (S) of the headrest are substantially inverted U.
It is inserted through support cylinders (20) (20) fixed vertically in the top part of the character-shaped frame body (2).

On the upper part of the frame main body (2), two support wires are erected in an upper and lower two-stage manner.
The deformation of the foam pad (3) shown in FIG.

Further, a gap between a back board (not shown) fixed to the back surface of the frame body (2) and the pad (3) by the lower support wire (1B) is prevented, and the upper end of the back board is moved downward. On the support wire (1B).

In FIG. 5, (2A) is a connecting rod (2) for integrally connecting both free ends of the frame body (2).
1) shows a side plate, and (22) shows a wire for supporting a pad.

The pad (3) for enclosing the frame body (2) is configured as shown in FIG. The pad (3) covers the front side of the frame body (2) and supports the back of the occupant, and the left and right sides are integrally provided on the left and right sides to cover the side plates (21) and (21). Part (32), top (34) and this top (34)
And a tongue piece (30) integrally formed with the frame body (2) to cover the upper rear surface of the frame body (2), and bent inward from the left and right side portions (32) to cover the left and right sides of the rear surface of the frame body (2). Left and right, bent portions (31), (31), and lower bent portion (31) covering the lower rear portion of frame body (2)
(31) and a lower bent portion (33) covering the lower rear portion of the frame body (2).

Accordingly, slits (30A) and (30A) are provided on the right and left sides of the tongue piece (30) in the vertical direction.
The slits (30A) and (30A) make it easier to remove the foam-molded pad (3) from the mold, and to make it easier for the pad (3) to be encapsulated in the frame body (2).

[0009]

The frame of the seat back on which the back board is mounted using the above-mentioned pad (3) has two support wires (1A) (1) as described above.
B) is installed on the upper part of the frame.

Therefore, the two support wires (1)
A) Since the upper portion of the front portion (35) of the pad (3) is supported by the (1B), the upper portion of the seating surface of the seat back becomes hard, and there is a problem that the sitting comfort is poor. That is, the amount of bending at the upper portion of the seat back is small due to the two support wires (1A) and (1B).

In addition, two support wires (1A)
Since (1B) is used, the number of parts and the number of welds are increased, and there is a problem that the weight is increased.

Accordingly, an object of the present invention is to improve the sitting comfort by eliminating the number of components in a seatback frame having a pad and a backboard as described above.

[0013]

A frame structure of a seat back according to the present invention for achieving the above object has a support wire extending laterally above an upper portion of a frame body.
The support wire is provided below each of the support cylinders, and is bent downward in a U-shape to hook the backboard, between the left and right bent portions, and outside the left and right bent portions. And a linear portion for preventing deformation of the pad.

Since an integral support wire is used and the support wire has a bent portion, the amount of deflection in the front-rear direction is increased, and the cushioning property of the upper portion of the seat back is improved.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a frame structure of a seat back according to the present invention, which is enclosed by a conventional pad (3) shown in FIG.
By attaching the backboard and covering the skin,
The seat back (SB) shown in FIG. 2 is formed.

In FIG. 1, the same reference numerals as in FIG. 5 denote the same members, and a description thereof will be omitted. That is, the frame structure according to the present invention is the same as the conventional two support wires (1A).
Instead of (1B), one support wire (1) is used.

This support wire (1) is connected to each support cylinder (2).
0) A bent portion (1) provided below (20) and bent downward in a U-shape for hooking a backboard (4) described later.
0) (10) and the left and right bent portions (10) (10)
The straight portions (11), (11), (1) which are located between and outside the left and right bent portions (10), (10) to prevent deformation of the pad.
1).

The lower ends (tips) of the bent portions (10) and (10) are connected to the conventional support wire (1B),
Each of the straight portions (11) is laterally laid on the upper portion of the frame body (2) at a predetermined distance from the top of the frame body (2) so as to function as the support wire (1A). I have.

That is, the distance between the lower end of the bent portion (10) and the top of the frame body (2) is the same as the distance between the support wire (1B) and the top of the frame body (2). The distance between the straight portion (11) and the top of the frame body (2) is the same as the distance between the support wire (1A) and the top of the frame body (2). Are welded to the frame body (2).

In front of the bent portions (10) and (10),
As shown in FIGS. 2 to 4, the lower ends of the stays (S) and (S) of the headrest (HD) are located. The stays (S) and (S) of the headrest (HD) are the support cylinders (20) and (2).
0), it is movable in the vertical direction and is fixed at a desired position by a stopper (not shown). In FIG. 2, (S
C) shows a seat cushion.

FIG. 3, FIG.
As shown in FIG. 4, a hook (40) provided inside the upper end of the backboard (4) is hooked, and the upper edge of the backboard (4) presses the lower end of the tongue piece (30) of the pad (3). And the pad (3) is covered with a skin (36). Then, the epidermis (3) covering the tongue piece (30)
The terminal of 6) is also bound to the bent portions (10) and (10) by a hog ring or the like.

On the other hand, the straight portion (1) of the support wire (1)
1), (11) and (11) are located inside the tongue piece (30) and support the tongue piece (30) so that the tongue piece (30) is not bent inward by an external force from the back side of the seat back (SB). ing.

In FIG. 3, the same symbols as those in FIG. 6 denote the same members, and a description thereof will be omitted.

[0024]

According to the present invention, a single support wire with a bent portion is provided on the frame body, and the upper portion of the pad is supported by the support wire, so that the cushioning property of the upper portion of the seat back is improved. A seat back with good sitting comfort can be provided.

Furthermore, unlike the conventional case, since two support wires are not used, the number of parts and the number of welds can be reduced, and the weight can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of the present invention.

FIG. 2 is a perspective view showing a use state of the present invention.

FIG. 3 is a sectional view taken along the line III-III of FIG. 2;

FIG. 4 is a partial sectional view of FIG. 3;

FIG. 5 is a perspective view of a conventional product.

FIG. 6 is a perspective view of a pad used in a conventional product.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support wire 2 Frame main body 3 Pad 4 Backboard 10 Support wire bent part 11 Support wire straight part

Claims (1)

[Claims] 1. A pair of right and left headrest support tubes are fixed vertically to the top of a substantially U-shaped frame body, and a backboard is mounted on the back side of the frame body. In a frame structure of a seat back covered with a foam pad in which a tongue piece covering a side upper portion is integrally formed, a support wire is laid laterally on an upper portion of the frame body, and the support wire is A bent portion provided below each support tube and bent in a U-shape to hook the back board, and between the left and right bent portions and the left and right bent portions are provided outside. A frame structure for a seat back, comprising: a straight portion for preventing deformation of a pad.