JPH1071909A - Air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and strongly attach a film-like switch to the backside of the cover body of an air bag device. SOLUTION: A membrane switch 16 is locked and held in the switch holding part 17a of a backup plate 17 so as to be moved. The outer peripheral part of the switch holding part 17a is welded to the backside of the covering part 31 of a cover body 21 and the membrane switch 16 is held between the switch holding part 17a and the cover body 21 so as to be moved. An extension part 17b is extended from the switch holding part 17a and an oblong hole is formed in the extension part 17b. The extension part 17b is held between a base plate 11 and the attaching part 11b of the cover body 21 and a rivet R is inserted into the oblong hole and fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, there has been known an airbag device provided on a boss portion of a steering wheel to protect a driver of an automobile from a collision impact or the like. The airbag device includes an inflator that injects gas, a bag-shaped airbag that is folded and stored, a cover body that covers the airbag, and a base plate to which the inflator, the airbag, and the cover body are attached. It has. When detecting the collision of the vehicle, the airbag device injects gas from an inflator, breaks the cover body at a predetermined tear line by the pressure of the inflation of the airbag, and deploys the cover body into a door shape. , And inflated and deployed in front of the occupant.

In this type of airbag device,
In order to improve the operability of a switch such as a horn, there is known a configuration in which a switch is operated by pushing a cover body of an airbag device.

In this respect, for example, a configuration described in Japanese Patent Application Laid-Open No. 7-40838 is known. In this configuration,
A membrane switch is attached to the back of the cover, and the back of the switch is covered with a rigid panel. When the cover is pushed, a membrane switch (membrane switch) is interposed through the cover. It pushes and closes the circuit.

[0005]

However, as in the conventional configuration described in Japanese Patent Application Laid-Open No. 7-40838, a film-like switch is directly attached to the back surface of the cover body, and the film-like switch of this film-like switch is mounted. In the configuration in which the back surface is covered with the rigid panel, there is a problem that handling of the membrane-shaped switch is complicated and the work of attaching the switch to the cover is complicated. Further, when the airbag is inflated and deployed and the cover body is broken and deployed, the cover body is curved, and the curvature of the switch and the rigid panel attached to the cover body is changed or reversed, so that the cover body of the switch and the rigid panel is formed. The stress will be concentrated on the part to be attached to the base. Therefore,
It is necessary to firmly attach the switch and the rigid panel to the cover body, and there is a problem that the manufacturing cost increases. In particular, when the temperature is low, for example, minus 40 ° C., the resin elongation, that is, the amount of elastic deformation becomes small, and there is a problem that a large stress is applied to the mounting portion when the cover body is unfolded. In addition, when there is a large temperature change, there is a problem that the horn may be activated when the airbag shrinks, deforms the cover body, or presses the rigid panel, and the horn is not intended. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an airbag device which can easily and firmly hold a switch with good operability.

[0007]

According to the first aspect of the present invention, there is provided an airbag device, which comprises an airbag which is inflated and deployed by inflow of gas, a deformable covering portion which covers the airbag, and a mounting piece which is continuous with the covering portion. , A mounting member to which a mounting piece of the cover body is mounted, a switch holding portion disposed between the airbag and the coating portion and fixed to the coating portion, and the switch. A deformable support member extending from a holding portion and having an extending portion attached to at least one of the attachment member and the cover body; and a film-like member held between the switch holding portion and the covering portion. And a switch.

In this configuration, when the cover of the cover is pushed, the switch is pressed through the cover, and the switch is closed with at least a part of the switch deformed. Further, when gas flows into the airbag, the covering portion breaks at a predetermined position due to the pressure at which the airbag inflates and deploys, and deploys together with the support member to which the switch is attached to form a projecting opening of the airbag. The membrane-like switch is held between the switch holding portion of the support member and the cover of the cover body, so that the switch can be easily handled, the airbag device can be easily assembled, and the cover body can be easily assembled. Even when is bent and deformed such that the curvature changes due to the influence of heat or the like, the concentration of stress on the switch is suppressed, and the switch does not come off or the operation feeling does not change.

According to a second aspect of the present invention, there is provided the airbag apparatus according to the first aspect, wherein the membrane-like switch comprises:
It is movably engaged and held by the switch holding section.

In this configuration, since the switch is movably held by the switch holding portion, even when the switch holding portion is deformed, the concentration of stress on the switch is suppressed, and the switch is held at the time of deployment. Even when the part is separated from the cover, the switch is held by the switch holding part. Further, since the switch is engaged and held by the switch holding portion, the assembly of the airbag device is facilitated.

According to a third aspect of the present invention, in the airbag apparatus of the first or second aspect, the extended portion of the switch holding portion is movably attached to at least one of the attachment member and the attachment piece. It is something that can be done.

In this configuration, the stress applied to the extending portion during deployment is reduced, and the mounting member is securely held.

[0013]

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

In FIG. 2, reference numeral 1 denotes a steering wheel of an automobile. The steering wheel 1 includes a steering wheel body 2, an airbag device (airbag module) 4 mounted on the occupant side of the steering wheel body 2, and the like. It is composed of The steering wheel 1 is normally attached to the vehicle body in an inclined state. Hereinafter, the occupant side, which is the front side of the airbag device 4, will be on the upper side, and the vehicle body side, which is the bottom side of the airbag device 4, will be on the lower side. It will be described as.

The steering wheel body 2 is
The rim 5 has an annular shape, a boss 6 located inside the rim 5, and four spokes 7 connecting the rim 5 and the boss 6. A boss fitted to a steering shaft (not shown) is provided below the boss 6 on the vehicle body side, and a boss plate (not shown) is integrally attached to the boss by welding or the like. . The core metal of the spoke portion 7 is connected to the boss plate, and the core metal of the rim portion 5 is connected to the core metal of the spoke portion 7. Further, a skin portion 8 made of a soft foamed polyurethane resin or the like is formed on an outer peripheral portion of the core metal of the rim portion 5 and an outer peripheral portion of a portion of the spoke metal 7 on the rim portion 5 side. .

The airbag device 4 is mounted above the boss 6, and as shown in FIGS. 1 to 3, an inflator 12 and an airbag 14 are mounted on a base plate 11 as a mounting member. Base plate 11
, Retainer 15, membrane switch as switch
Backup plate as support member with 16 attached
17 and a cover 21 are attached.

The base plate 11 is formed by bending a steel plate and forming an upper plate portion 11a having a substantially rectangular planar shape.
A substantially rectangular cylindrical peripheral wall portion 11b that extends downward from the peripheral portion of 11a
Are formed. In addition, a circular hole-shaped inflator mounting hole 11c is formed in the center of the upper plate portion 11a, and a plurality of bolt through holes 11d are formed around the inflator mounting hole 11c. ing. Further, a pair of bracket mounting portions 11f on both sides is provided on the peripheral wall portion 11b.
A nut is integrally mounted inside the bracket mounting portion 11f, and a plurality of rivet through holes 11h are formed in the peripheral wall portion 11b at predetermined intervals. Further, the front and rear peripheral wall portions 11b are provided with rivet through holes 11h.
A lock receiving portion 11i is formed between the members.
The base plate 11 is
The steering wheel body 2 is fixed to a pair of brackets on both sides provided on a boss plate of the steering wheel body 2 by bolts screwed to the nuts of f.

The inflator 12 has a substantially cylindrical inflator body 12a, and gas injection ports 12b for injecting gas are formed radially at predetermined intervals on an upper portion of the inflator body 12a. From the inflator body 12a, a flange portion 12 for attachment toward the outer peripheral side is formed.
and a plurality of bolt holes 12d are formed in the flange portion 12c. In addition, the inflator body 12
a is provided with a starting portion (igniter, squib) connected to a lead wire 12e led out from the lower side of the inflator body 12a, and a medicine is provided so as to surround the starting portion. The pellets are filled, and by applying electric energy to the starting portion, the reaction of the drug pellets is started, and a large amount of inert gas, for example, nitrogen gas, is instantaneously generated and ejected from the gas injection port 12b. ing. An inflator cover 12g that covers a lower portion of the inflator 12 is attached to the inflator 12, and a leading end of the lead wire 12e is
Connector 12h is attached.

On the other hand, the airbag 14 is formed in a bag shape by, for example, superposing two circular base cloths of the same outer shape made of a woven cloth or the like and sewing the outer periphery thereof. Also airbag
A circular opening 14c into which the upper half of the inflator 12 is inserted is provided in the center of the lower surface of the inflator 12, and a plurality of bolt holes 14d are formed around the opening 14c. At the same time, a deaeration port (not shown) is formed at a position separated from the opening 14c. Further, an annular reinforcing cloth 14g is stacked on each of the opening 14c and the deaeration port,
It is sewn together and reinforced.

The retainer 15 has an annular base portion.
15a. The base portion 15a has a planar outer shape of a rectangular shape with rounded corners, a circular inside opening, and a plurality of through holes (not shown) formed in the planar portion of the base portion 15a. They are formed at equal intervals.
The mounting bolts 24
And are integrally fixed by spot welding or the like.
Also, each mounting bolt 24 has a nut shown in FIG.
25 is screwed.

The cover 21 is integrally formed of a synthetic resin such as a soft thermoplastic elastomer by injection molding or the like, and covers a part of the boss 6 and the spokes 7 of the steering wheel body 2. 31 and this covering part 31
Mounting piece 32 which has a substantially rectangular cylindrical shape and protrudes downward from the back surface of
And

On the surface (upper surface) of the covering portion 31 of the cover body 21, a circular circular portion 31a is formed substantially at the center, and the four spoke portions 7 are covered from the circular portion 31a. A curved surface portion 31b that is continuous with the skin portion 8 is formed. Also, the back surface (lower surface) of the covering portion 31 of the cover body 21
A tear line 36 is formed inside the mounting piece 32, is formed to be substantially H-shaped in a plane, and is recessed, and is more vulnerable than the other part of the covering part 31. I have. That is, the tear line 36 includes a transverse portion 36a extending in the longitudinal direction on both sides, and a pair of vertical portions 36b provided on both ends of the transverse portion 36a and extending along the inside of the mounting piece 32. When the airbag 14 is inflated, the covering portion 31 is cleaved along the tear line 36 to form a pair of front and rear door pieces 37a and 37b that extend forward and backward. In addition,
The cross section 36a of the tear line 36 is deflected to the rear of the vehicle (to the front of the occupant) from the center of the covering section 31 and bypasses the circular section 31a to be curved toward the front. I have. Also, the terminal portion 36c of each vertical portion 36b is gently inverted so that the tip is parallel to the vertical portion 36b,
When the door pieces 37a and 37b are formed, the break is prevented from propagating to portions other than the tear line 36, and the end portions 36c on both sides are connected so that the door pieces 37a and 37b do not separate from the cover body 21. ing.

Further, the covering portion 31 of the cover body 21 includes
Located on the back side of the substantially circular portion 31a, the switch
Are formed. The switch disposing portion 38 is formed with an operating portion 38a having a substantially circular shape and formed in a thin thickness, and a rib portion (welding margin) 38b surrounding the operating portion 38a in a substantially C-shaped plane. The portion surrounded by the rib portion 38b is a horn switch operating portion (horn operating range) that can be elastically deformed in the vertical direction. A groove 38c is formed between the operation part 38a and the rib 38b. Further, a large number of projections (not shown) project from the operation section 38a toward the lower side, and a virtual surface connecting the tips of these projections is set as a cylindrical surface or a flat surface. Note that the entire lower surface of the operation unit 38a may have the same shape as the virtual surface.

On the other hand, the mounting piece 32 of the cover body 21 has a substantially rectangular cylindrical shape fitted to the outside of the peripheral wall 11b of the base plate 11, and the rivet through hole 32a communicating with the rivet through hole 11h of the peripheral wall 11b. Are formed at predetermined intervals, and a pair of cutout portions 32b for mounting portions are formed on both sides to be fitted to the bracket mounting portions 11f on both sides. Further, locking projections 32c shown in FIG. 1 protrude from the front and rear mounting pieces 32 between the rivet through holes 32a.

Further, the backup plate 17 is shown in FIG.
As shown in FIGS. 3 and 4, etc., a switch holding portion 17a having a substantially circular planar shape and an extension portion 17b extending from the switch holding portion 17a are integrally formed of a synthetic resin or the like. . Further, the hardness of the backup plate 17 is formed so as to be equal to or higher than the hardness of the covering portion 31 of the cover body 21. On the upper surface of the switch holding portion 17a, a holding rib (welding margin) 17c is formed in a substantially C-shape in a plane substantially along the periphery of the switch holding portion 17a and substantially all around except the portion on the extension portion 17b side. At the same time, a plurality of engagement holding portions 17d project from the holding rib 17c toward the inside of the switch holding portion 17a at predetermined intervals. Further, a mounting portion 17e projecting toward both sides is formed at the tip of the extension portion 17b. Further, a pair of elliptical fixing holes 17f are formed in the mounting portion 17e near both ends, and a pair of rectangular fixing holes are located inside the fixing holes 17f. An engagement hole 17g is formed. The fixing hole 17f and the engaging hole 17g are formed in an elongated shape along the extending direction of the extending portion 17b.

On the other hand, the membrane switch 16 constitutes a horn switch of an automobile, and has a planar elliptical (thin) film shape, that is, a sheet-like or sheet-like switch which is elastically deformable or flexible. It has a main body 16a and a projecting portion 16b extending from the switch main body 16a. Then, the projecting portion 16b was aligned with the portion where the holding rib 17c was not formed, and the switch main body 16a was loosely fitted inside the holding rib 17c of the backup plate 17 and protruded from the holding rib 17c. Engagement holding part 17d
The upper surface is abutted against and is loosely held. Further, the switch body 16a includes a pair of sheets made of a polyester resin film body, such as polyethylene terephthalate (PET) resin, which are superimposed on each other, and a conductive film such as a copper foil is adhered to opposing surfaces of these sheets. It is formed by wearing. Furthermore, spacers such as silicone rubber which are compressible and deformable are arranged at regular intervals in a dot shape between these conductive films, and the conductive films are separated from each other in a state where no force is applied, so that the switch body is formed.
With the 16a pressed, the conductive films contact each other to close the switch (circuit). In addition, these conductive films have lead wires 16d positioned at the protruding portions 16b, respectively.
Is connected to a horn circuit on the vehicle body side via a connector provided at the end of the lead wire 16d.

Next, an assembly process of the airbag device 4 will be described.

First, in order to attach the airbag 14 to the base plate 11, the retainer 15 is inserted into the inside of the airbag 14 through the opening 14c, and the bolt hole 14 of the airbag 14 is inserted.
Each of the mounting bolts 24 is inserted into d, and the opening 14c of the airbag 14 is aligned with the inner peripheral edge of the base 15a of the retainer 15. Subsequently, the mounting bolts 24 protruding from the airbag 14 are inserted into the bolt through holes 11d of the base plate 11 from above, and the inflator mounting holes of the base plate 11 are inserted.
Align 11c with opening 14c of airbag 14.

Subsequently, the airbag 14 is connected to the base plate.
The base plate 11 is folded so as to fit in the outer peripheral shape of the upper plate portion 11a of the base plate 11 so as to be wound in a petal shape around the inflator mounting hole 11c of the base plate 11.

On the other hand, the membrane switch 16 is loosely fitted movably within a predetermined range inside the holding rib 17c of the backup plate 17 while bending the switch body 16a, and is engaged and held by the engagement holding portion 17d.

Then, the backup plate 17 to which the membrane switch 16 is attached is mounted on the cover body from the back side.
21 and insert the membrane switch 16 into the cover 21
, The switch holding portion 17a along the switch mounting portion 38, the extension portion 17b along the mounting piece portion 32, and the holding rib 17c of the backup plate 17 with the cover member.
It is fixed to the rib portion 38b by welding or the like. In this state,
The switch body 16a of the membrane switch 16 is a cover
It is held so as to be movable along the surface direction between 21 and the backup plate 17.

Subsequently, the peripheral wall 11b of the base plate 11 to which the folded airbag 14 is attached is fitted inside the mounting piece 32 of the cover 21, and the airbag 14 is attached to the cover 21.
Cover with. At this time, the locking projection 32c protruding from the mounting piece 32 of the cover body 21 is engaged with the locking receiving portion 11i of the peripheral wall portion 11b of the base plate 11 through the engagement holes 17g on both sides of the backup plate 17. Then, positioning and temporary fixing are performed.

Then, in this state, the rivet R is inserted into the rivet through hole 32a from outside the mounting piece 32 of the cover body 21, and the rivet of the peripheral wall portion 11b of the base plate 11 is inserted through the fixing hole 17f of the backup plate 17. By inserting and caulking through the through hole 11h, the cover
The 21 mounting pieces 32 are fixed.

Further, in this state, the membrane switch
The switch holding portion 17a of the backup plate 17 to which the 16 is attached is located between the circular portion 31a of the cover body 21 and the airbag 14 on the upper plate portion 15e of the retainer 15.

Subsequently, from the back side of the base plate 11,
The inflator body 12a of the inflator 12 is inserted into the opening 14c of the airbag 14 through the inflator mounting hole 11c, and the mounting bolt 24 protruding below the base plate 11 is inserted into the bolt through hole 12d of the flange 12c. ,
By tightening and fixing with the nut 25, the airbag device 4 is assembled as shown in FIG.

In the airbag device 4, the bracket mounting portion 11f of the base plate 11 is fixed to the bracket of the steering wheel main body 2 with bolts, and is fixed to the steering wheel main body 2, and the connector of the membrane switch 16 is connected. By connecting 12h to a cable reel device such as a clock spring device or a slip ring device via a wire harness, the membrane switch 16 is connected to the circuit of the horn device provided on the vehicle body side. I have.

The circular portion 31 of the covering portion 31 of the cover body 21
When a is pressed with a finger or the like, the horn switch operation section is bent downward and elastically deformed. Then, the protrusion provided on the back surface of the circular portion 31a presses the upper surface of the membrane switch 16 whose lower surface is supported by the backup plate 17 and deforms so as to compress the thickness, and the opposing conductive films come into contact with each other. In this state, the circuit is closed and the horn is blown.

When a vehicle collides, an inflator is activated by a signal from a collision diagnosis unit (not shown).
When the igniter 12 is activated and the charged propellant reacts, an inert gas such as nitrogen gas rapidly flows into the airbag 14 through a gas injection port 12b formed on the peripheral surface of the inflator 12. Inflated and folded airbag
14 expands rapidly.

Then, due to the pressure of the inflation of the airbag 14, the covering portion 31 of the cover body 21 is cut along the tear line 36 in a substantially H-shape, and a pair of front and rear door pieces 37a and 37b are formed. Further, the door pieces 37a and 37b rotate together with the backup plate 17 to which the membrane switch 16 is attached while being curved in the front-rear direction to form a projecting opening of the airbag 14. The projecting opening of the airbag 14 is formed from the projecting opening. Protrudes and inflates and deploys to the front side of the occupant to reduce the impact of the collision.

When the door pieces 37a and 37b of the covering portion 31 of the cover body 21 are deployed by operating the airbag device 4, the backup plate attached along the inner surface of one of the door pieces 37a. 17 is exposed on the outer surface side, and the door piece 37a is curved so that the curvature is inverted. Therefore, stress is concentrated on the holding rib 17c of the switch holding portion 17a, which is the mounting portion of the backup plate 17, and the fixing hole 17f and the engaging hole 17g of the extension portion 17b. Hole
The fixing hole 17f and the engaging hole 17g are formed in an elongated shape along the extending direction (development direction) of the extending portion 17b. As the position shifts due to sliding, the stress is relieved.

As described above, according to the present embodiment, the membrane switch 16 is arranged on the back surface side of the cover body 21 and the back surface of the membrane switch 16 is supported by the backup plate 17, so that operability and operational feeling are improved. In addition to realizing a good horn switch, when the airbag device 4 is operated and the door pieces 37a and 37b of the covering portion 31 of the cover body 21 are deployed, the stress applied to the backup plate 17 attached to the cover body 21 is increased. The structure can be simplified without unnecessarily increasing the strength of the mounting structure of the backup plate 17, that is, the membrane switch 16,
Manufacturing costs can be reduced. On the other hand, the membrane switch 16 and the backup plate 17
The influence on the deployment of the door pieces 37a, 37b can also be reduced, so that the airbag 14 can be deployed quickly and smoothly.

The membrane switch 16 is movably held by the engagement holding portion 17d of the backup plate 17, and is movably held between the backup plate 17 and the cover 21, so that the door piece The deformation (bending) of the membrane switch 16 due to stress is suppressed without being affected by the unfolding of the portion 37a and even when the cover body 21 is slightly deformed (linear expansion) due to a normal temperature change or the like. Can be prevented from being closed unexpectedly. Further, since the membrane switch 16 is engaged and held by the engagement holding portion 17d of the backup plate 17, the assembling becomes easy, and when the switch holding portion 17a of the backup plate 17 comes off the cover body 21, Also, the membrane switch 16 can be held.

Further, since the number of components does not increase and the structure does not become complicated, the manufacturing cost can be reduced.

In the above embodiment, a plurality of engagement holding portions 17d for engaging and holding the membrane switch 16 are projected from the backup plate 17, and the outer peripheral portion of the switch holding portion 17a of the backup plate 17 is provided. Is welded to the cover body 21, and the membrane switch 16 is movably held between the backup plate 17 and the cover body 21, but the structure is such that the membrane switch 16 is movably held to prevent concentration of stress. If so, various structures can be adopted. For example, as shown in FIGS. 5 and 6, the holding rib of the switch holding portion 17a of the backup plate 17 is provided.
An intermediate step 17h is formed at 17c, a flat lid 41 is fitted and welded to the intermediate step 17h, and the membrane switch 16 can be moved between the lid 41 and the backup plate 17. Can also be held. In this embodiment, the lid 41 is formed of a soft resin or the like which is easily deformed, and is not welded to the cover 21, but is welded only to the backup plate 17.

Further, in each of the above-described embodiments, a code groove for inserting the lead wire 16d of the membrane switch 16 is formed in the extension portion 17b of the backup plate 17, so that the lead is formed when the airbag device 4 is assembled. Line 16
d can be easily protected.

Further, the backup plate in each of the above-described embodiments is formed of the same olefin-based thermoplastic elastomer resin as that of the cover body 21 and various thermoplastic elastomer resins such as polyester-based, polyamide-based, and styrene-based resins. Alternatively, a thermoplastic or two-component reactive polyurethane resin or the like can be used. further,
This backup plate can be formed of only a resin, a member such as a glass plate, an aramid resin net, a metal plate such as iron or aluminum, or a combination of these members and a resin.

The airbag 14 can be folded in a petal shape, or a plurality of airbag fabrics can be stacked on the inflator 12 so as to be folded in one or two rows.

[0048]

According to the airbag device of the first aspect, by pushing the cover of the cover, the switch can be pressed through the cover to close the switch.
Then, the switch is supported by the support member and locally deformed by applying a force, thereby improving responsiveness and improving operational feeling. In addition, since the membrane switch is held between the switch holding portion of the support member and the covering portion of the cover member, the switch can be easily handled, the assembly of the airbag device can be facilitated, and the cover member can be easily assembled. Even when the switch is unfolded or deformed so as to change the curvature due to the influence of heat, concentration of stress on the switch can be suppressed, and disconnection of the switch and a change in operation feeling can be prevented. Therefore,
There is no need to fix the switch more strongly than necessary, and the manufacturing cost can be reduced.

According to the airbag device of the second aspect,
In addition to the effect of claim 1, since the switch is movably held by the switch holding portion, even when the switch holding portion is deformed, the concentration of stress on the switch can be suppressed and the switch holding portion is covered when the switch is deployed. Even when separated from the body, the switch can be held in the switch holding portion. Further, since the switch is engaged with and held by the switch holding portion, the airbag device can be easily assembled.

According to the airbag device of the third aspect,
In addition to the effects of claim 1 or 2, the extension of the switch holding portion is movably attached to at least one of the mounting member and the mounting piece, so that stress applied to the extension at the time of deployment is reduced, and mounting is performed. The member can be securely held.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of an airbag device of the present invention.

FIG. 2 is a plan view of a steering wheel equipped with the airbag device.

FIG. 3 is an exploded perspective view of the airbag device.

FIG. 4 is a perspective view of a support member of the airbag device.

FIG. 5 is an exploded perspective view showing another embodiment of the airbag device of the present invention.

FIG. 6 is a cross-sectional view of a part of the airbag device.

[Explanation of symbols]

 4 Airbag device 11 Base plate as mounting member 14 Airbag 16 Membrane switch as switch 17 Backup plate as support member 17a Switch holding portion 17b Extension 21 Cover body 31 Covering portion 32 Mounting piece

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshihiko Kakihata 218 Aoshima-cho, Fuji-shi, Shizuoka Prefecture Japan Plastics Co., Ltd.

Claims (3)

[Claims] 1. A cover body provided with an airbag which is inflated and deployed by inflow of gas, a deformable covering portion for covering the airbag, and a mounting piece portion continuous with the covering portion, and a mounting piece portion of the cover body. A switch holding portion disposed between the airbag and the covering portion and fixed to the covering portion; and a switch holding portion extending from the switch holding portion and extending from the switch holding portion. An airbag device, comprising: a deformable support member provided with an extending portion attached to at least one of them; and a membrane-like switch held between the switch holding portion and the covering portion. 2. The airbag device according to claim 1, wherein the membrane-shaped switch is movably engaged and held by the switch holding portion. 3. The airbag device according to claim 1, wherein the extended portion of the switch holding portion is movably attached to at least one of the attachment member and the attachment piece.