JP4315338B2 - Airbag device - Google Patents

Description

  The present invention relates to an airbag device for a driver's seat.

2. Description of the Related Art Conventionally, as an airbag device for an automobile driver's seat, a decorative member is fixed to a portion on the steering shaft extension of a steering device, and the airbag is folded and stored around the center member. Although there are things covered with a cover, the decorative member with multiple functions such as a horn (warf) function is heavy, so it pops out with the airbag when it is deployed, or a cover for holding the decorative member There was a problem such as being scattered and hitting a passenger.
Therefore, it is known that when the airbag is deployed, the cover is opened by inflating the airbag so that they are not easily scattered, and at the same time, the decorative member does not jump out to the passenger side together with the airbag. ing.

FIG. 16 shows an example of an airbag apparatus. As shown in the figure, a decorative member 21R provided at the central portion of the steering handle 24R is fitted into a guide sleeve 10R made of an inelastic material attached to the handle shaft, and an occupant-side end 22R of the sleeve 10R is connected to the decorative member. By forming the diameter smaller than the diameter of 10R, when the airbag 1R is deployed as shown, the decorative member 21R is held by the sleeve 10R so as not to move together with the deployed airbag 1R. (See Patent Document 1).
German Patent No. 1974991C2

  However, in the above-described conventional one, not only the guide sleeve 10R made of an inelastic material is separately provided, but also the guide sleeve 10R needs to be processed so as to accommodate and hold the decorative member 21R in the guide sleeve 10R. Therefore, there is a problem that the production is complicated and the manufacturing cost is high.

  The present invention has been made to solve the above-mentioned problems of the prior art, and its purpose is to scatter an airbag cover having a decorative member when the airbag is deployed, so that the mounting member is attached together with the airbag. An airbag device that can be prevented from jumping out to the occupant side is realized with a simple configuration, and its manufacturing cost is greatly reduced as compared with a conventional structure.

According to a first aspect of the present invention, there is provided an inflator for generating a gas, an airbag that can be inflated by the gas generated by the inflator, an airbag cover that can be folded and stored and expanded when the airbag is inflated, and a central portion In an airbag device comprising a base plate having an opening for fitting an inflator to the cushion plate and a cushion plate for sandwiching the airbag between the base plate, the cushion plate is disposed on a surface facing the base plate. A central portion of the airbag cover that is formed with a concave portion for accommodating the clamping portion having a depth substantially equal to the thickness of the clamping portion of the connecting member and that is expanded by a tear line or the like when the airbag is inflated. Is attached to the connecting member sandwiched between the base plate and the cushion plate together with the airbag. The airbag is configured to hold the central portion of the airbag cover when the airbag is deployed when the airbag is inflated forward beyond the central portion of the airbag cover by the gas from the inflator. Device.
The invention according to claim 2 is characterized in that a hole or a recess is provided in the connecting member, and a protrusion engageable with the hole or the recess is provided in the concave portion of the cushion plate. An airbag device.
The invention according to claim 3 is the airbag device according to claim 1, wherein the connecting member is fastened and fixed to the inflator fixing bolt in the concave portion.
The invention of claim 4 is an airbag device according to any one of claims 1 to 3, wherein the connecting member is a metal member.

The present invention provides a connecting member that immobilizes and fixes a decorative member mounting portion at the center of an airbag cover when the airbag is inflated and deployed using an air bag using a base plate and a cushion plate for tightly fixing an inflator. Similarly, since it is fixed tightly, the connecting member can be firmly attached to the base plate without using any special means by sharing the attachment parts.
Therefore, the decorative member or the like can be prevented from jumping out to the passenger together with the airbag when the airbag is deployed with a simple configuration, and the airbag device can be manufactured at low cost by simplifying the configuration.

Hereinafter, an airbag device for a driver's seat according to an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a front view showing a mounted state of the airbag device, and FIG. 2 is a cutaway side view showing a main part of the airbag device.

  As shown in FIGS. 1 and 2, the airbag device of the present embodiment is incorporated in a vehicle steering device, and includes a support member 20, a center member 30, an airbag 40, and an airbag cover 50. ing.

  The support member 20 is a member that is attached to an end portion side of a steering shaft (not shown) and is disposed at a substantially central portion of the steering wheel 10. In the present embodiment, the support member 20 is connected to the base plate 16 and the cushion plate 22. And a member 28.

FIG. 3 is a perspective view showing the back surface of the base plate 16.
The base plate 16 is formed in a substantially disk shape, and a hole 16h into which the inflator 18 can be fitted is formed at the center thereof, and an airbag cover mounting piece 16a and a base plate 16 are formed on the back side thereof. A mounting piece 16b for mounting itself is cut and raised from the disk surface. In this specification, for convenience, the driver's seat side is referred to as the front side, and the opposite side is referred to as the back side.

4 is a perspective view of the connecting member 28 shown in FIG. 2. FIG. 4A shows the first embodiment, and FIG. 4B shows the second embodiment.
As shown in FIGS. 4A and 4B, the connecting members 28 and 28 'are bent at substantially right angles to the central portions 28a and 28a' having holes 28ah and 28ah 'into which the mounting bolts 27 are fitted. It is composed of a plate-shaped metal piece composed of formed leg portions 28b and 28b ′ and mounting legs 28c and 28c ′ bent at substantially right angles to the leg portions 28b and 28b ′. In addition, the mounting leg 28c according to the first embodiment is formed with a hole or recess 28d for positioning when combined with the cushion plate 22, as will be described later. Further, the mounting foot 28c 'according to the second embodiment is formed with a mounting hole 28e' corresponding to a mounting hole 22a 'of a cushion plate 22' and a mounting hole 16c of the base plate 16 which will be described later. It has come to be tightened together.

FIG. 5 shows a cushion plate according to the first embodiment, FIG. 5A is a rear view thereof, FIG. 5B is a side view showing a part of the cushion plate, and FIG. 6 is a cushion plate according to the second embodiment. FIG. 6A is a rear view of the cushion plate according to the second embodiment, and FIG. 6B is a side view showing a part thereof in cross section.
The cushion plate 22 according to the first embodiment has a substantially rectangular shape as shown in FIG. 5A, which is a rear view thereof, and an insertion hole 22h of the inflator 18 is provided at the center, and the insertion hole 22h each corner around the hole 22a for inserting a screw or rivet 22 e, etc. for attaching the cushion plate 22 to the base plate 16 is provided.
Further, the back surface of the cushion plate 22 constitutes a contact surface 22b that can contact the front surface side of the base plate 16 via the airbag 40, and the contact surface 22b is a side view of FIG. 5B. As is apparent, a concave portion 22c formed by drawing, for example, is formed. The concave portion 22 c is formed to a depth substantially equal to the thickness of the mounting foot 28 c of the connecting member 28 when the cushion plate 22 is connected to the base plate 16. The concave portion 22c is formed with a convex portion 22d that can be engaged with and engage with a hole or recess 28d provided in the attachment leg 28c of the connecting member.

With this configuration, when connecting the base plate 16 and the cushion plate 22, the airbag 40 can be sandwiched and fixed between the surface of the base plate 16 and the abutting surface 22b of the cushion plate, and the surface side of the base plate 16 can be The attachment legs 28c of the connecting member 28 can be sandwiched and fixed between the concave portions 22c of the cushion plate 22.
Here, in the cushion plate 22 of the first embodiment, when the projection 22d is engaged with the hole or recess 28d of the coupling member 28, the coupling member 28 is clamped between the base plate 16 and the cushion plate 22. The positioning of the connecting member 28 can be easily performed.

  6A and 6B show a cushion plate 22 'according to the second embodiment. In the figure, “'” is attached to the same reference numerals in the same or corresponding portions as in FIGS. 5A and 5B. In the second embodiment and the first embodiment of the cushion plate, the concave portion and the mounting hole are arranged outside the concave portion 22c in the first embodiment, whereas the concave portion and the mounting hole are arranged outside the concave portion 22c. The embodiment is different in that the mounting hole 22a ′ is disposed in the concave portion 22c ′, and is the same in other points. When the cushion plate 22 ′ according to the second embodiment is used, the connection member 28 ′ according to the second embodiment is used at the same time to connect the base plate 16 and the cushion plate 22 ′ to the surface of the base plate 16. And the cushion plate abutment surface 22′b, and the attachment leg 28c ′ of the connecting member 28 ′ is sandwiched between the surface side of the base plate 16 and the concave portion 22c ′ of the cushion plate 22 ′. Further, screws are inserted into the mounting holes 22a ′ of the cushion plate 22 ′, the holes 28e ′ of the connecting member 28 ′, and the holes 16c of the base plate 16 and fastened together.

  The inflator 18 is formed in a substantially thick disk shape, and is configured such that gas can be injected when a predetermined impact is detected. The inflator 18 passes through the hole 16h of the base plate 16 and is in close contact with the back surface side of the base plate 16, and is fixed together with the cushion plates 22, 22 'and the like by mounting bolts via the mounting hole 16c of the pace plate 16. The That is, the inflator 18 is fixed in a state of being protruded and disposed on the front side of the pace plate 16, and the jet gas from the inflator 18 is jetted on the front side of the base plate 16.

  In the present embodiment, the center member 30 includes a center main body 32 and a horn switch mechanism 34 attached to the center main body 32 as shown in FIG. The center member 30 may have a decorative shape such as, for example, an emblem of an automobile, instead of or in addition to the horn switch mechanism 34.

  As shown in FIG. 7, the center main body 32 is formed in a substantially bowl shape, and the surface side, that is, the driver side, is open. An insertion hole 32ah through which the mounting bolt 27 can be inserted is formed in the bottom portion 32a of the center main body 32.

  Therefore, the center member 30 inserts the bolt 35 from the hole 32ah in the bottom 32a of the center body 32 into the hole 52h in the central recess 52 of the airbag cover 50 and the connection holes 28ah and 28ah 'in the connection members 28 and 28'. Further, by fastening the nut 27 to the bolt 35 from the back side of the connecting member 28, the bolts 35 are attached and fixed to the connecting members 28 and 28 'via the central recess 52 of the airbag cover 50, and thus the steering wheel 10 is fixed. Of the steering shaft 12, that is, on the axial extension of the steering shaft 12.

  As shown in FIG. 2, the horn switch mechanism 34 includes an operation portion 34a for closing the opening of the center main body portion 32, a biasing portion 34b such as a spring for biasing the operation portion 34a toward the surface side, and a horn. A contact portion that is electrically connected through an electric wire and opens and closes in response to a pushing operation of the operation portion 34 a is provided, and is incorporated in the center main body portion 32. Then, by pushing and operating the operation portion 34a disposed at a substantially central portion of the steering wheel 10, the contact of the contact portion is closed and a sound is generated.

FIG. 8A is a cross-sectional view showing the airbag 40 of the first example used in the present embodiment, and FIG. 8B is a rear view showing the airbag 40.
As shown in FIGS. 8A and 8B, the airbag 40 is configured to be inflatable and deployable in a bag shape. More specifically, for example, it is formed in a bag shape that can be developed into a flat spherical shape (ellipsoidal shape) by sewing two substantially circular outer peripheral edge portions together.

  On the back side of the airbag 40. An airbag attachment hole 42ha is formed in the substantially central portion. In FIG. 8A, a small hole 42hb formed on the outer periphery of the airbag attachment hole 42ha is a screw fixing hole.

  The airbag 40 is sandwiched between the peripheral edge portion of the airbag attachment hole 42ha between the peripheral surface of the hole 16h of the base plate 16 and the contact surfaces or back surfaces 22b, 22b 'of the cushion plates 22, 22'. Attached to the support member 20. In this state, the gas ejection portion of the inflator 18 (the front side portion of the inflator) is disposed in the airbag 40, and the ejection gas from the inflator 18 is introduced into the airbag 40, so that the airbag 40 is removed from the steering device. It can be inflated and deployed in the form of a bag toward the driver's seat.

  Further, a through hole 44h is formed on the back side of the airbag 40, that is, on the opposite side of the airbag 40 from the inflating and deploying direction. The through hole 44 h has an opening shape and a size that can penetrate the center member 30. In the present embodiment, the through hole 44h is formed at a substantially intermediate position between the airbag attachment hole 42ha and the outer peripheral edge portion of the airbag 40 in the rear view. An annular reinforcing cloth is sewn on the outer periphery of the through hole 44h.

  The airbag 40 is attached to the base plate 16 and the cushion plate 22, folded in a state where the connecting member 28 is exposed to the outside of the airbag 40 through the through hole 44 h, and when the airbag 40 is inflated and deployed, the connecting member The through hole 44h can pass through the concave portion 52 in the center of the stationary airbag cover.

FIG. 9A is a perspective view showing an airbag 40 according to the second embodiment, and FIG. 9B is a cross-sectional view showing the airbag 40.
The airbag of the second embodiment is different from the airbag of the first embodiment in that it includes a cylindrical body 46.

  The airbag main body portion 42 ′ is formed in a bag shape that can be developed into a flat spherical shape (ellipsoidal shape) by sewing the outer peripheral circular portions of two substantially circular cloths together. An air bag mounting hole 42ha 'is formed in a substantially central portion on the back side of the air bag main body 42', and a small screw hole 42ha 'is formed around the air bag mounting hole 42ha'. .

Also in the airbag 40 ′ of the second embodiment, the peripheral edge portion of the airbag mounting hole 42ha ′ is separated from the surface of the peripheral edge of the hole 16h of the base plate 16 and the contact surface or back surface 22b, 22b ′ of the cushion plates 22, 22 ′. The airbag 40 ′ is attached to the support members 20, 20 ′ so as to be sandwiched between them. A gas ejection portion (a front side portion of the inflator) of the inflator 18 is disposed in the airbag 40, and the ejection gas from the inflator 18 is introduced into the airbag 40, so that the airbag 40 is directed from the steering device toward the driver seat. This is similar to the airbag of the first embodiment in that it can be inflated and deployed in a bag shape.
Further, the insertion hole 43h ′ at the substantially central portion on the surface of the main body portion 42 ′ of the airbag 40 ′ of the second embodiment also has an opening shape and size through which the concave portion 52 can pass.

  FIG. 10A is a perspective view of the airbag cover 50. The airbag cover 50 is formed in a substantially bowl shape by resin as shown in the figure, and has a substantially truncated cone-shaped recess 52 for accommodating the center member 30 at the center thereof as already described.

The airbag cover 50 covers the airbag 40 folded around the connecting members 28 and 28 ′, and the bolts 27 are inserted into the mounting holes 52 h of the recess 52 to connect the connecting members 28 and 28 ′. In addition to being fixed, it is fixed to the base plate 16 via the mounting piece 16a as will be described later.
In the state where the center member 30 is attached to the recess 52 of the airbag cover, the surface of the operation portion 34a is substantially flush with the surface of the airbag cover 50 as shown in FIG.

  FIG. 10B is a rear view of the airbag cover. As shown in the figure, a groove that can be cut (broken) on the back surface of the airbag cover 50 leaving a central recess 52 fixed by the connecting members 28 and 28 'when the airbags 40 and 40' are inflated and deployed. A shaped tear line is formed. That is, on the back surface of the airbag cover 50, when receiving the inflation pressure of the airbag, a circular tear line Lc around the central recess 52, and the central cover 52a can be divided into a plurality of cover pieces 50a, leaving the central portion. A series of tear lines including a plurality of, for example, four tear runs L1 to L4 extending radially from the tear line Lc are provided. Further, the airbag cover 50 is divided into cover pieces 50a when the airbag 40 is inflated, and mounting pieces 50b provided for the respective cover pieces 50a are made of metal base plates so that they can be opened independently. It is individually screwed to each mounting piece 16a which is cut and raised from the 16 disc portions and formed to protrude from the back side of the base plate 16.

FIG. 11 is a perspective view similar to FIG. 10A, showing another embodiment of the airbag cover. The airbag cover 50 is also provided with a circular tear line Lc around the central recess 52 and a plurality of, for example, four tear runs L1 to L4 extending radially from the tear line Lc. The only difference from the bag cover 50 is that the cut portion 52c is previously formed on a part of the circular tear line Lc around the central recess 52, and the other configurations are the same.
By providing the cutting portion 52c in the tear line Lc of the airbag cover 50 as described above, the opening piece (cover piece) 50a of the airbag cover 50 can be opened more smoothly and reliably when the airbag is inflated.
Further, since the cut portion 52c is blocked by the decorative member, it cannot be seen from the outside, and there is no possibility that the appearance of the airbag device is impaired.

In the above configuration, when the airbags 40 and 40 'are inflated and deployed, the airbag cover 50 is pushed and broken by the tear line L portion around the center member 30 by the force, and the broken cover piece breaks the bowl-shaped central recess 52. Leave each open outward. At that time, the cover pieces 50a are completely separated from each other and are provided with tear lines so that they can be opened independently, and the mounting pieces 16a of the base plate 16 are made of a plastically deformable material and are deformed once. mounting piece 16 a that is to not be back.

  FIG. 12 is a view of each cover piece 50a in an opened state as viewed from the base plate 16 side. As shown in the figure, the airbag cover 50 is divided into cover pieces 50a when the airbags 40 and 40 'are inflated, and the mounting pieces 16a are kept in a twisted deformation state so that the airbags 40 and 40' It is configured to be able to expand smoothly under pressure from the inflator 18.

When the airbag is inflated, a hole (or a slit) 44h (first embodiment) formed in the airbag (the first embodiment) or a portion of the cylindrical body 46 (second embodiment) is left behind on the airbag cover. When passing around the central recess 52, the airbag 40 is guided outwardly by a truncated cone-shaped surface whose diameter gradually increases toward the front side outside the back surface of the central recess 52, and expands outward. That is, the airbags 40 and 40 'are inflated while passing through the fixed central recess 52 of the airbag cover (first embodiment) or while passing (second embodiment).
In addition, when the airbag is inflated in this manner, the speed of the inflation of the airbag forward is slightly delayed due to the resistance when passing through the airbag. For this reason, the airbag is inflated in the lateral direction first, and the pressure at which the inflating airbag 40, 40 ′ directly hits the driver can be reduced.

Next, the assembly procedure of the airbag device will be described.
When the first and second airbags 40, 40 ′ are assembled, first, the airbag 40 (first embodiment) or the airbag main body 42 and the cylindrical body 46 (second embodiment) are attached to the surface side of the base plate 16. In the airbag cover 50, the through hole 44h (first embodiment) of the airbag 40 or the insertion hole 43h (second embodiment) of the cylindrical body 46 is formed in the concave portion 52 of the cover. The mounting legs 28c and 28c 'of the connecting members 28 and 28' are fitted into the concave portions 22c and 22c 'on the back surface of the cushion plates 22 and 22', respectively, and in this state, the airbag mounting hole 42ha is stored. The base plate 16 and the cushion plate 22 are sandwiched between the peripheral portion of the hole 16h of the base plate 16 and the contact surfaces 22b and 22b 'of the cushion plates 22 and 22'. , 22 '. Thereafter, the nut 25 is screwed into the mounting bolt 27 protruding into the airbag cover 50 from the back side using the inflator 18 mounting hole 16h of the base plate 16, and the horn switch mechanism 34 is assembled in the center main body 32. The base plate 16, the cushion plate 22, and the inflator are screwed.

  At this time, the connecting members 28, 28 ′ are arranged in the airbag 40 through the airbag mounting hole 42 ha (first embodiment), or the airbag mounting hole 42 ha ′ of the tubular body 46. And it is made to arrange | position in the cylindrical body 46 through the front end side opening part 46a (2nd Example). Further, the opening 46a on the distal end side of the cylindrical body 46 is formed so as to have a diameter smaller than the maximum diameter of the concave portion 52 at the center of the airbag cover 50 or is sandwiched, and the airbag is inflated. The cylindrical body 46 is prevented from coming out of the central recess 52. Thereby, the assembly of the airbag apparatus shown in FIG. 2 is completed.

The deployment operation of this airbag device will be described.
First, the inflator 18 is ignited by the impact detection at the time of a vehicle collision or the like, gas is generated by the inflator 18, and this gas is introduced into the airbags 40 and 40 ′. Airbag cover 50 receives the force when the air bag 40, 40 'begins to expand along the tear line L1~L4 and LC, i.e. cracking leaving a central recess 52, the cover piece 50a is Expands radially.

  After the airbag cover 50 is broken, at the initial stage where the airbag 40 of the first embodiment begins to expand, the airbag 40 slightly expands around the inflator 18 as shown in FIG.

Further, when gas is introduced into the airbag 40 of the first embodiment, as shown in FIG. 14, the recess 52 pulls out the through hole 44 h and the airbag 40 is inflated.
Similarly, when gas is introduced into the airbag 40 ′ of the second embodiment, the airbag 40 ′ is inflated while the recess 52 enters the cylindrical body 46, as shown in FIG.
After the airbag is inflated to some extent, in the airbag 40 of the first embodiment, the portion that is unevenly distributed below the concave portion 52, that is, the front side portion and the lower portion of the airbag 40 continue to be mainly inflated. As shown in FIG. 14, the airbag 40 is inflated and deployed into a flat spherical shape, which is a natural inflated shape, by pushing away the portion of the bag 40 in which the through-hole 44h is formed from above. Further, in the case of the airbag 40 ′ of the second embodiment, it is inflated and deployed into a flat spherical shape as shown in FIG.

In the airbag 40 of the first embodiment, after the airbag 40 has been inflated to some extent, the through hole 44h is located on the back side of the airbag 40, so that excessive gas leakage does not occur from the through hole 44h. Further, it is possible to prevent the leaked gas from being sprayed on the driver. When the inflation of the airbag 40 is completed, the gas in the airbag 40 is discharged through the through-hole 44h on the back side.
Further, in the airbag 40 ′ of the second embodiment, the distal end opening 46 a of the cylindrical body 46 prevents the recess 52 from passing through, so the airbag 40 ′ does not expand beyond the length of the cylindrical body 46. .

  According to the airbag device configured as described above, the center member 30 can be attached so that it cannot be ejected when the airbags 40 and 40 ′ are deployed. The airbag 40 can be inflated and deployed without flying out.

  Further, in the present embodiment, the central recess 52 of the airbag cover 50 is attached and fixed to the base plate 16 for attaching the inflator via the connecting members 28 and 28 '. The connecting members 28 and 28' are fixed to the base plate. 16 and the cushion plates 22 and 22 'can be attached at the same time as the airbag 40, thereby simplifying the structure by simplifying the fixing means of the recess 52 and sharing parts for attachment. be able to.

It is a front view which shows the airbag apparatus of this invention. It is sectional drawing which shows the principal part of the airbag apparatus of this invention. It is a perspective view of the back surface of a base plate. It is a perspective view of a connection member. The cushion plate which concerns on a 1st Example is shown, FIG. 5A is the back view, FIG. 5B is a side view. The cushion plate which concerns on a 2nd Example is shown, FIG. 6A is the back view, FIG. 6B is a side view. It is sectional drawing of a center member main body. The airbag which concerns on 1st Example is shown, FIG. 8A is the sectional drawing, FIG. 8B is the back view. The airbag which concerns on 2nd Example is shown, FIG. 9A is the perspective view, FIG. 9B is the sectional drawing. The airbag cover of a 1st Example is shown, FIG. 10A is the perspective view, FIG. 10b is the back view. It is a perspective view of the airbag cover of a 2nd Example. It is the figure which looked at the mode of expansion of an air bag cover when an air bag inflated from the back side of a base plate. It is sectional drawing which shows the initial state of the expansion | swelling of the airbag of 1st Example. It is sectional drawing which shows a state when the airbag of 1st Example has completed expansion | swelling. It is sectional drawing which shows a state when the airbag of 2nd Example has completed expansion | swelling. It is sectional drawing of the conventional airbag apparatus.

Explanation of symbols

10 ... steering wheel, 16 ... base Supureto, 18 ... inflator, 20 ... support member, 22, 22 '... cushion plate, 28, 28' ... connection member, 30- .. Center member, 32... Center main body, 40... Airbag, 46 .. cylindrical body, 50.

Claims (4)

An inflator that generates gas, an airbag that can be inflated by the gas generated by the inflator, an airbag cover that can be folded and stored to expand when the airbag is inflated, and an inflator to be fitted in the center In an airbag device comprising: a base plate having an opening of: and a cushion plate for sandwiching the airbag between the base plate;
The cushion plate has a concave portion for accommodating the clamping portion having a depth substantially equal to the thickness of the clamping portion of the connecting member on a surface facing the base plate , and a tear line when the airbag is inflated. The central portion of the airbag cover that is expanded by, for example, is connected to the connecting member sandwiched between the base plate and the cushion plate together with the airbag, and the airbag passes over the central portion of the airbag cover by the gas from the inflator. The airbag device according to claim 1, wherein when the airbag is inflated forward, the connecting member holds a central portion of the airbag cover when the airbag is deployed.   The airbag device according to claim 1, wherein a hole or a recess is provided in the connecting member, and a protrusion that can be engaged with the hole or the recess is provided in the concave portion of the cushion plate.   The airbag device according to claim 1, wherein the connecting member is fastened and fixed to a bolt for fixing an inflator in the concave portion. Airbag device according to any one of 3 claims 1, wherein the connecting member is a metal member.

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