JPH04348712A - Seat back - Google Patents

Abstract

PURPOSE:To provide the seat back which can provide an air bag mechanism in a state held surely to a rigid body without remarkably increasing thickness of the seat back. CONSTITUTION:In a frame 4, a bend part 16 protruded forward is formed, and in the rear, a space A is demarcated, and in this space A, an air bag mechanism 7 is provided by holding it by the frame 4.

Description

[Detailed description of the invention]

0001

[Purpose of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat bag, and is used as a seat bag for a front seat that has a built-in airbag mechanism for protecting rear seat occupants.

0003

[Prior Art] Conventionally, this type of seat bag was
The one shown in Japanese Unexamined Patent Publication No. 2-257910 is known. This seat bag consisted of a frame, an elastic body disposed in front of the frame, and a skin covering the frame and the elastic body.

0004

In recent years, it has become popular to install an air bag mechanism in the driver's seat from the viewpoint of passenger protection, and it is also desired to install an air bag mechanism to protect rear seat passengers. Therefore, when installing an airbag mechanism to protect passengers in the rear seats, we believe that the most effective way to operate the airbag mechanism and save space in the cabin is to incorporate the airbag mechanism into the seatbacks of the front seats. However, in the case of the above-mentioned seat bag, the frame and elastic bodies inside the seat bag get in the way, and the impact caused by the operation of the air bag mechanism needs to be supported by a rigid body, so the air bag mechanism is designed to avoid these members. It will be held and placed in a frame. As a result, the thickness of the seat back increases significantly, resulting in a loss of interior space.

[0005] Therefore, the technical object of the present invention is to provide a seat bag in which an air bag mechanism can be disposed in a state in which the seat bag is reliably held in a rigid body without significantly increasing the thickness of the seat bag. It is.

[0006]

[Structure of the invention]

[0007]

[Means for Solving the Problems] The technical means taken in the present invention to solve the above-mentioned technical problem is that a bent portion is formed in the frame and projects forward and defines a space at the rear, and and an air bag mechanism disposed at the bent portion and held by the frame at the bent portion.

[0008]

[Operation] The above technical means operates as follows. The airbag mechanism is disposed within a space defined by the bent portion of the frame, and is held by the frame at the bent portion. As a result, the air bag mechanism can be built into the seat bag without significantly increasing the thickness of the seat bag, while being reliably held on the rigid body and with a minimum increase in thickness.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, a seat 1 serving as a front seat is composed of a seat cushion 2 and a seat back 3 disposed at the rear of the seat cushion. The seat bag 3 is composed of a frame 4, an elastic body 5, and a skin 6, and has an air bag mechanism 7 for protecting rear seat occupants and a seat belt mechanism 8 for protecting front seat occupants built therein. .

As shown in FIGS. 3 and 4, the frame 4 is composed of a main frame 9 formed by bending a pipe, and a side frame 12 formed by combining two members 10 and 11. The side frame 12 is fixed to one side of the main frame 9 by welding or the like.
A seat belt mechanism 8 is supported at the upper end. Further, at the lower part of the member 10 of the side frame 12, a cross member 1 is fixed to the other side of the main frame 9 by welding or the like.
3 and 14 are formed continuously, and the cross member 13
, 14 that are connected to the other side of the main frame 9 and the lower end of the side frame 9 are formed with connecting portions 15 that are connected to the seat cushion 2 through reclining mechanisms (not shown), respectively. .

As shown in FIG. 2, the elastic body 5 is made of urethane and an S spring, as is well known in the art, and is disposed in front of the frame 4. Further, the skin 6 covers the frame 4 and the elastic body 5, and serves as the exterior of the seat bag 3.

As shown in FIGS. 1 to 4, U-shaped bent portions 16 projecting forward are formed on both sides of the main frame 4, and a space A is formed between the main frame 4 and the outer skin 6. It is clearly defined. Further, both side portions of the main frame 4 located at the bent portion 16 are connected by a reinforcing plate 17. An air bag mechanism 7 is disposed within this space A, and the air bag mechanism 7 is held on the main frame 4 by a reinforcing plate 17.

As described above, the air bag mechanism 7 is disposed within the space A defined by the bent portion 16 formed in the main frame 4. As a result, the air bag mechanism 7 can be built into the seat bag 3 with a minimum increase in thickness without significantly increasing the thickness of the seat bag 3. Further, the air bag mechanism 7 is reliably held by the reinforcing plate 17 to ensure normal operation. Furthermore, the bent portion 16
The main frame 4 is relatively easy to bend forward due to the presence of the main frame 4, and as a result, the bending portion 16 of the main frame 4 absorbs the impact from the air bag mechanism 7 when the air bag mechanism 7 is activated and the impact caused by the collision of the body. It can be effectively absorbed by bending forward, and the load input due to the impact to the reclining mechanism can be reduced.

[0015] The main frame is not limited to a pipe, but may be formed from a single plate. or,
As shown in FIG. 5, the bent portion 16 may have an L-shape formed at the upper part of the main frame 4 and opened upward.

[0016]

Effects of the Invention The present invention provides a seat back comprising a frame, an elastic body disposed in front of the frame, and a skin covering the frame and the elastic body. Since the seat bag is configured to include a forwardly projecting bent portion and an air bag mechanism disposed within the space and held by the frame at the bent portion, the following effects are achieved.

[0017] The air bag mechanism can be built into the seat bag without significantly increasing the thickness of the seat bag, while being reliably held to a rigid body and by increasing the thickness to a minimum.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a front seat employing a seat bag according to the present invention.

FIG. 2 is a longitudinal cross-sectional view of FIG. 1;

FIG. 3 is a perspective view of the frame.

FIG. 4 is an exploded perspective view of the frame.

FIG. 5 is a perspective view corresponding to FIG. 3 showing a modified example of the frame.

[Explanation of symbols]

3 Seat bag 4 Frame 5 Elastic body 6 Epidermis 7 Air bag mechanism 16　Bending part A Space

Claims (1)

[Claims] Claim 1. A seat back comprising a frame, an elastic body disposed in front of the frame, and a skin covering the frame and the elastic body, wherein the front part is formed on the frame and defines a space at the rear. a protruding bend,
and an air bag mechanism disposed within the space and held by the frame at the bent portion.