JPH10287196A - Vehicular seat equipped with air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce parts in number for an air bag device provided for a vehicular seat, and make a seat back frame side mounting portion simpler in structure. SOLUTION: Let a seat back frame 11 be integrally formed into a frame shape, a housing recessed place 11b housing an air bag device 10d is formed at one side of the frame 11, first mounting parts 11d to which an inflator 16 integrally combined with an air bag 15 is mounted, and second mounting parts 11e to which an air bag lid 17 is mounted, are provided for the housing recessed place 11b. The inflator 17 is mounted to the first mounting parts 11d integrally with the air bag 15, and the air bag lid 17 is mounted to the second mounting parts 11e. By this constitution, since the case of the air bag device 10d and a mounting portion at the frame 11 side, can be eliminated, the parts of the air bag 10d can thereby be reduced in number, and members at the frame 11 side can also be cut, the mounting structure of the air bag device can thereby be made simpler.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat equipped with an airbag device.

[0002]

2. Description of the Related Art As one type of vehicle seat, Japanese Patent Application Laid-open No.
As shown in JP-A-169264, an airbag device is housed on one side of a seatback constituting a vehicle seat, and the airbag device is operated at the time of a side collision of the vehicle to move the airbag to the vehicle body. There is a vehicle seat equipped with an airbag device configured to be deployed between a side wall portion of a vehicle and a seated person, such as a side wall portion and a vehicle door, to prevent a direct impact from the side wall portion of the vehicle to a seated person.

In the vehicle seat of this type, as shown in the above-mentioned publication, a mounting portion on the seat back side for mounting the airbag device is formed in the seat back frame. Are formed completely independently of the respective components of the airbag device.

That is, in the vehicle seat of this type, the mounting portion of the airbag device formed on one side of the seatback frame constituting the seatback includes a side panel fixed to one side of the seatback frame. ,
And an airbag module mounting portion fixed to the side panel.

On the other hand, the airbag device comprises an inflator, a storage container for storing the inflator, an airbag, and an airbag lid for covering an opening of the storage container. The airbag is attached to the module mounting portion, the airbag is connected to the inflator, and the airbag lid is fixed to the airbag module mounting portion in this state, whereby the airbag is mounted on the seatback frame side.

[0006]

As described above, in the conventional vehicle seat equipped with the airbag device, a plurality of components are required to form the mounting portion on the seatback frame side, and the airbag device is required. Has a large number of component parts. Further, since the number of components of these components and components is large, the mounting structure of the airbag device becomes complicated, the mounting accuracy is reduced, and the manufacturing cost of the components and components is increased, and The number of management steps also increases. Accordingly, it is an object of the present invention to address these issues.

[0007]

The present invention relates to a vehicle seat equipped with an airbag device, and more particularly, to a vehicle seat having an airbag device housed on one side of a seatback constituting a vehicle seat. A vehicle seat of a type equipped with an airbag device configured to operate the airbag device at the time of a side collision to deploy the airbag between a side wall portion of the vehicle and a seated person.

According to the present invention, there is provided a vehicle seat of the type described above, wherein a seat back frame constituting the seat back is integrally formed into a frame shape, and an airbag device is provided on one side of the seat back frame. An accommodating recess that opens to the outside for accommodating is formed, and an attaching portion for attaching an inflator integrated with the airbag is provided on an inner wall portion of the accommodating recess. In the attached state, the airbag device is housed in a housing recess of the seat back frame.

In a vehicle seat equipped with an airbag device according to the present invention, when the airbag device is provided with an airbag grid, a second seat for attaching the airbag grid to an opening edge of the housing recess. A configuration in which two mounting portions are provided can be adopted.

In the vehicle seat equipped with the airbag device according to the present invention, one or a plurality of hooking claws are formed so as to protrude from one side edge of the airbag grid, and the second mounting portion is provided. Is formed in a locking hole in which the locking claw is locked, and the locking claw of the airbag lid is locked in the locking hole, so that the airbag lid is opened at the opening edge of the accommodation recess. It can be configured to be attached to the.

[0011]

In the vehicle seat equipped with the airbag device configured as described above, the seatback frame itself integrally formed in a frame shape constitutes an attachment portion of the airbag device, It also functions as a case for an airbag device. For this reason, it is not necessary to configure the seatback-side mounting portion of the airbag device with a member separate from the seatback frame, and the case of the airbag device itself can be omitted.

Therefore, according to the vehicle seat, the number of components of the airbag device itself can be reduced, and the components at the mounting portion of the airbag device on the seatback frame side can be omitted. This allows
The mounting structure of the airbag device is simplified, the mounting accuracy is improved, the manufacturing cost of the seat is reduced, and the quality control man-hour is also reduced.

Further, in the vehicle seat, since a part of the seat back frame also serves as a case of the airbag device, a conventional case formed by welding a press-formed product of an iron plate is used. There is no burr,
There is no occurrence of damage to the airbag due to burrs during deployment of the airbag, and stable deployment performance of the airbag can be ensured.

In the vehicle seat, since the seat back frame is a frame-shaped integrally molded product,
The cross-sectional structure of the frame can be easily configured to have a high rigidity cross-sectional structure, and the cross-sectional structure can be easily configured to be reinforced by interposing a rib or the like. It can be significantly improved.

[0015] The seat back frame is cast from a material such as aluminum light alloy or magnesium alloy.
Since it can be easily formed by injection molding using a magnesium alloy, a synthetic resin, or the like as a material, the cost can be significantly reduced in addition to the elimination of the mounting portion, and the weight can be significantly reduced.

In the vehicle seat, one or a plurality of engaging claws are formed so as to protrude from one side edge of the air bag grid, and the second attaching portion at the opening edge of the housing recess is connected to the engaging claw. Is formed in a hook hole to be hooked, and by hooking a hook claw of an airbag lid in the hook hole,
By adopting a configuration in which the airbag grid is attached to the opening edge of the accommodation recess, the workability of mounting the airbag grid can be remarkably improved as compared with the conventional mounting means in which the airbag grid is mounted by caulking a plurality of rivets. At the same time, it is possible to eliminate scattering due to breakage of each rivet when the airbag is deployed.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 shows an example of a vehicle seat equipped with an airbag device according to the present invention. The vehicle seat includes a seat cushion 10a and a seat back 10b.
, A headrest 10c, and an airbag device 10d, and the seat back 10b is attached to the rear end of the seat cushion 10a so as to be rotatable in the front-rear direction via a reclining mechanism (not shown). The headrest 10c is mounted at the top of the seat back 10b so as to be vertically adjustable. The vehicle seat is mounted on the vehicle floor via a pair of left and right seat tracks 10e supporting a seat cushion 10a.

The seat back 10b is shown in FIGS.
As shown in FIG. 4, the seat back frame 11, the cushion pad 12, the seat cover 13, and the back board 14 are provided. Seat back frame 11
Is a frame-shaped member integrally formed by injection molding using a magnesium alloy as a material.
Is formed in a U-shaped cross section, and a concave portion that opens laterally is formed on a side portion of the frame body 11a. A plurality of ribs are provided inside the recess, the upper part of the side is formed in the accommodation recess 11b, and the lower part is formed in the mounting part 11c of the upper arm (not shown) which is mounted on the seat track 10e side. ing.

In the vehicle seat, the seat back frame 11 is an injection-molded article made of a magnesium alloy, but instead of this, the seat back frame 11 is usually formed by casting using an aluminum alloy or a magnesium alloy as a material. Alternatively, it may be formed by injection molding using various synthetic resins as materials.

Housing recess 11 of seat back frame 11
b denotes an airbag 15 constituting the airbag device 10d.
And the inflator 16, and the housing recess 1
A pair of upper and lower mounting holes 11d is formed in the inner wall of 1b. Each mounting hole 11d forms a mounting portion of the inflator 16, and corresponds to a first mounting portion of the present invention.
At the opening edge of the rear side wall of the housing recess 11b, locking holes 11e extending in the left-right direction are formed at three upper and lower locations. Each hook hole 11 e is provided with an air bag grid 17.
, And corresponds to the second mounting portion of the present invention.

The airbag device 10d includes the airbag 1
5, the inflator 16 and the air back grid 17 do not include a conventional air bag case, and the air bag case is also used as the housing recess 11b of the seat back frame 11.

The airbag 15 constituting the airbag device 10d has a storage portion 15b for a tubular inflator 16 at an end of an airbag body 15a. The inflator 16 is housed in the housing recess 11 b of the seat back frame 11 in a state where the inflator 16 is inserted into the housing portion 15 b of the airbag 15. The housed inflator 16 includes a pair of upper and lower bolts 16b provided on an inflator body 16a.
Is inserted into each mounting hole 11d of the accommodation recess 11b, and a nut 16c is screwed to a tip of each bolt 16b, thereby being attached to the inner wall portion of the accommodation recess 11b integrally with the airbag 15. .

The air back grid 17 is formed of a plate-shaped lid body 17a having substantially the same shape as the opening of the accommodation recess 11b of the seat back frame 11, and three upper and lower portions on the rear end edge of the lid body 17a. Each of the hooks 17b has a front end projecting inward. Each hooking claw 17b has a claw portion 17c at its tip. Each claw portion 17c can be inserted into each of the hook holes 11e on the seatback 11 side, and in the inserted state, each of the claw portions 17c is hooked on the opening edge of the front end side of each of the hook holes 11e. .

A cushion pad 12 is placed and mounted on the seat back frame 11 in which the air bag device 10d is accommodated, and the cushion pad 1
2 together with a seat cover 13, and a back board 14 is attached to the back side thereof. In this state, the airbag device 10d is
The side cover body 13 that constitutes the seat cover 13 on the side
a, 13b, both side cover bodies 13
The sewn portions 13c of the a and 13b are configured as easily breakable portions.

In the vehicle seat constructed as described above, the airbag device 10d is provided in the accommodation recess 11b of the seatback frame 11 at the side of the seatback 11 as shown in FIG.
At the time of the side collision of the vehicle,
The inflator 16 of the airbag device 10d detonates based on the detection signal from the impact detection sensor, and the airbag 15
The airbag body 15a is inflated.

When the airbag body 15a is inflated, the lid body 17 of the airbag lid 17 is moved by the inflation pressure.
a pivots outward from the base end of each hooking claw 17b as a base to open the opening of the accommodation recess 11b and break the seam 13c of the cover 13a, 13b on both sides of the seat cover 13. I do.

As a result, as shown in FIG. 4, the airbag body 15a protrudes outward from the open portion of the housing recess 11b and deploys forward at the side of the seated occupant. Protect from.

By the way, in the vehicle seat,
The seat back frame 11, which is integrally formed in a frame shape, constitutes a mounting portion of the airbag device 10d and also functions as an airbag case of the airbag device 10d. For this reason, the seat back side mounting portion of the airbag device 10d does not need to be formed as a separate member from the seatback frame 11, and the airbag device 10d is not required.
d The own airbag case can be omitted.

Therefore, according to the vehicle seat, the number of components of the airbag device 10d can be reduced, and the components of the mounting portion on the seatback frame 11 side can be omitted. As a result, the mounting structure of the airbag device 10d is simplified, the mounting accuracy is improved, and the seat back frame 1 is mounted.
1. The manufacturing cost of the airbag device 10d is reduced, and the quality control man-hour is also reduced.

Further, in the vehicle seat, since the recess 11b of the seat back frame 11 also serves as the airbag case of the airbag device 10d, a conventional press-formed iron plate is welded. There are no burrs due to welding like an airbag case, and the airbag 1
There is no occurrence of damage due to burrs at the time of deployment of the airbag 5, and stable deployment performance of the airbag 15 can be ensured.

Further, in the vehicle seat, since the seat back frame 11 is a frame-shaped integrally molded product, as shown in the drawing, the cross-sectional structure of the frame main body 11a is configured to have a highly rigid cross-sectional structure, and By constructing a reinforced cross-sectional structure with ribs or the like interposed therebetween, the lateral rigidity of the seat back frame 11 can be significantly improved.

The seat back frame 11
Can be easily molded by casting using aluminum light alloy, magnesium alloy or the like, or by injection molding using magnesium alloy or synthetic resin as a material. The cost can be significantly reduced, and the weight can be significantly reduced.

In the vehicle seat, a plurality of latching claws 17b are formed at the edge of the lid body 17a of the airbag lid 17 so as to protrude therefrom, and the opening edge of the housing recess 11b of the seatback frame 11 is formed. Hook hole 1
1e, and each hooking claw 17 of the air bag grid 17 is formed.
Since the airbag lid 17 is attached to the seat back frame 11 by hooking the airbag lid 17 into each of the hook holes 11e, the airbag lid 17 is attached to the seat back frame 11 as compared with the conventional attachment means in which the airbag lid 17 is attached with a plurality of rivets. The workability of attaching the grid 17 can be remarkably improved, and scattering due to breakage of each rivet when the airbag 15 is deployed can be eliminated.

[Brief description of the drawings]

FIG. 1 is a perspective view of a vehicle seat equipped with an airbag device according to an example of the present invention.

FIG. 2 is a partial perspective view of a seat back frame constituting the seat, and an exploded perspective view of an airbag device.

FIG. 3 is a partial cross-sectional plan view showing an accommodation state of the airbag device in the seat.

FIG. 4 is a partial cross-sectional plan view corresponding to FIG. 3 and showing an operating state of the airbag device in the seat.

[Explanation of symbols]

10a: seat cushion, 10b: seat back, 1
0c: headrest, 10d: airbag device, 10e
... Seat track, 11 ... Seat back frame, 11
a ... frame body, 11b ... accommodation recess, 11c ... attachment site, 11d ... attachment hole, 11e ... hook hole, 12 ... cushion pad, 13 ... seat cover, 13a, 13b ... side cover body, 13c ... stitching part , 14 ... backboard, 15
... airbag, 15a ... airbag body, 15b ... storage part, 16 ... inflator, 16a ... inflator body,
16b: bolt, 16c: nut, 17: air bag grid, 17a: lid body, 17b: hook, 17c ...
Claw part.

Claims (3)

[Claims] An airbag device is housed on one side of a seatback constituting a vehicle seat, and the airbag device is actuated at the time of a side collision of the vehicle to move the airbag between a side wall portion of the vehicle and a seated person. In a vehicle seat equipped with an airbag device configured to be deployed in, a seatback frame constituting the seatback is integrally formed into a frame shape,
A storage recess is formed on one side of the seat back frame, the storage recess being open to the outside for storing the airbag device, and a mounting portion for mounting an inflator integrated with the airbag is provided on an inner wall portion of the storage recess. A vehicle seat equipped with an airbag device, wherein the airbag device is housed in a housing recess of the seatback frame in a state where the inflator is integrally attached to the airbag at a mounting portion. 2. A vehicle seat equipped with the airbag device according to claim 1, wherein:
A vehicle seat equipped with an airbag device, further comprising a second mounting portion for mounting an airbag grid constituting the airbag device. 3. A vehicle seat equipped with the airbag device according to claim 2, wherein one or a plurality of engaging claws are formed so as to protrude from one side edge of the airbag grid, and the second mounting is performed. The airbag lid is formed in a hooking hole in which the hooking hook is hooked, and the hooking hook of the airbag lid is hooked in the hooking hole, whereby the airbag lid is opened at the opening edge of the housing recess. A vehicle seat equipped with an airbag device, which is attached to a part.