JPH08324372A - Seat back structure of vehicular seat - Google Patents

Abstract

PURPOSE: To replace partially without replacing the whole seat back after the expansion of air air bag by providing a back board corresponding to the air bag, with a bend part bent by the expansion pressure of the air bag so as to expand the air bag outward. CONSTITUTION: At the time of expansion, an air bag 3 bends a deforming part 11A outward into the opened state from the bend part 11C of a back board 1 by the expansion pressure so as to open an air bag storage part (a), and the air bag 3 protrudes outside to expand. The state of the air bag 3 before assembling a seat back SB is shown, and the air bag 3 is assembled onto the back board 1 side together with an inflator 4 and the like. The back board 1 having this air bag 3 and the like is assembled last to form the seat back SB. After the expansion of the air bag 3, the seat back SB is placed again in a usable state by partial replacement.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat back of a vehicle (automobile) seat, and more particularly to a seat back structure for protecting an occupant in a vehicle side collision.

[0002]

2. Description of the Related Art Conventionally, there is an air bag mounted on a seat for protecting an occupant from a door and a side wall of a vehicle body which is deformed by a side impact load during a side collision of an automobile. This detects an impact on a side door or the like with a detection sensor and outputs the detection signal to an inflator, which causes the detonator to explode to inflate the airbag. As a result, direct contact between the deformed side door and the like and the occupant is prevented, and the occupant is protected.

[0003]

A device for protecting an occupant in the event of a side collision by means of the above-mentioned airbag is, for example, as disclosed in Japanese Patent Laid-Open No. 4-50052, an airbag is a seat cushion or a seat back. It is a structure that is built in the inside and when the airbag inflates, breaks the outer skin that constitutes the seat cushion and seat back and projects to the outside.

Therefore, the airbag is used as a seat cushion,
Since the seat cushion is incorporated into the seat back, the ease of assembling the seat cushion and the like is poor, and after the airbag is inflated, the seat cushion and the like cannot be used, and the seat cushion and the like must be entirely replaced.

Therefore, the present invention aims to improve the assemblability of a seat back having a side impact airbag so that after the airbag is inflated, the seat back can be partially replaced without replacing the entire seat back. To aim.

[0006]

A seat back structure for a vehicle seat according to the present invention for achieving the above object comprises:
A backboard that is detachably attached to a frame that forms a seatback and forms a side surface from the back of the seatback, and an airbag storage portion is formed between a side surface portion of the backboard that is located on the door side, and the backside. A support plate integrally formed with the board and detachably attached to the frame, and an airbag having an inflator which is stored in the airbag storage section and outputs a detection signal of a detection sensor. Is characterized by being provided with a bent portion that is bent by the inflation pressure of the airbag so that the airbag is inflated toward the outside.

[0007]

When the load at the time of a side collision is applied to the side door or the like, the detection sensor detects and the inflator outputs and the airbag is inflated. The backboard is bent from the bent portion by the pressure due to the inflation of the airbag, and the airbag between the support plate and the backboard is projected and inflated to protect the occupant.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vehicle seat having a seat back (SB) according to the present invention, in which (1) is a seat back (S).
The seat back (S
The main body (10) which constitutes the back and back of (B), and this main body (1
0) right and left side portions integrally forming the outer surface of the seat back (SB) (11A) (11B) (12)
It consists of and.

The air bag (3) is provided inside the door (side door) and the side surface portions (11A) (11B) on the side wall of the vehicle body.
Built-in, the side parts (11A) (11B) are the main body (1
0) side fixed part (11B) and a deformed part (11A) integrally formed on the fixed part (11B) through a thin-walled bent part (11C). )
Expands to protect the occupant, as shown by the chain line. In the figure, (SC) indicates a seat cushion.

FIG. 2 shows the seat back frame (6),
The state where the backboard (1) is attached is shown. The backboard (1) has the airbag (3) and the like previously incorporated therein, and the backboard (1) is detachably attached to the frame (6). Is configured to get.

The side portion (11) of the backboard (1)
A bearing plate (2) with a fitting portion (20) that fits into the frame (6) is provided on the side of (A) (11B), and this bearing plate (2) and the side surface portion of the backboard (1) ( 11
An air bag storage portion (a) is formed between A) and (11B), and the air bag (3) and the like are stored in the air bag storage portion (a).

Although not shown, the backboard (1)
It is also optional to provide the frame (6) corresponding to the side surface portion (12) of the frame with the same support plate (2), and the backboard (1) is provided with the hook pieces (65) (65). ), And by a screw or the like, it is detachably attached to the reinforcing rod (64) integrated with the frame (6).

FIG. 3 shows a state in which the airbag (3) is built in, and the airbag (3) is folded to form the module (5).
The module (5) is stored in the airbag storage part (a), and one end of the module (5) is hooked on a hook (13) provided on the deformation part (11A) of the backboard (1). There is. Further, an inflator (4) that outputs a detection signal of a detection sensor that detects a load at the time of a side collision is connected to the airbag (3), and the module (5) is provided.
Is fixed to a bracket (51) which is integrally connected to the bearing plate (2).

In FIG. 3, (6A) in the figure is a raised portion on the seat side of the seat back (SB) on the door side, and (6B).
Is a raised portion on the opposite side, (61) is a spring stretched around the frame (6), (62) is a foam cushion body, and (6)
3) shows the epidermis covering the cushion body (62), respectively.

When the airbag (3) is inflated, the bending pressure (11C) of the backboard (1) is caused by the inflation pressure.
As shown in the chain line in FIG. 3, the deformed portion (11A) is outwardly bent to open the air bag storage portion (a) so that the air bag (3) becomes the chain line in FIGS. As shown, it projects outward and expands.

FIG. 4 shows a state of the airbag (3) before the seat back (SB) is assembled, and the airbag (3) is incorporated on the backboard (1) side together with the inflator (4) and the like. The seat back (SB) is formed by finally assembling the back board (1) having the airbag (3) and the like.

Since the backboard (1) and the support plate (2) are detachably attached to the frame (6) of the seat back (SB), as shown by the chain lines in FIGS. After inflating the bag (3), the seat back (S
B) is ready for use.

[0018]

According to the present invention, an air bag or the like is provided on the back board side, and the back board is detachably attached to the frame. Therefore, the air bag or the like is incorporated into the back board in advance and the back board is attached. As a result, the seat back is assembled. Therefore, the assembling property of the seat back having the airbag is improved.

In addition, after the airbag is inflated due to a side collision, the seat back can be reused by replacing only the back board with the airbag.

[Brief description of drawings]

FIG. 1 is a perspective view of a seat back according to the present invention.

FIG. 2 is a perspective view of a seat back frame to which a back board incorporating an airbag is attached.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a sectional view showing an essential part of the present invention.

[Explanation of symbols]

 1 Backboard 2 Bearing plate 3 Airbag 6 Frame I Airbag storage

Claims (2)

[Claims] 1. An airbag storage portion is provided between a backboard which is detachably attached to a frame constituting a seatback and constitutes a side surface from a back surface of the seatback, and a side surface portion of the backboard located on a door side. The air bag includes a support plate that is configured and integrally attached to the backboard and is detachably attached to the frame, and an air bag that has an inflator that is housed in the air bag housing and outputs a detection signal of a detection sensor. A seat back structure for a vehicle seat, characterized in that the corresponding back board is provided with a bent portion that is bent by the inflation pressure of the airbag and the airbag is inflated toward the outside. 2. The bent portion of the backboard is formed by reducing the thickness of the backboard, and the backboard bent by the bent portion is provided with a hook for hooking an airbag module. The seat back structure of the vehicle seat described.