JP2009214771A - Airbag device for driver's seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an airbag device for a driver's seat capable of increasing an opening area of an airbag cover and expanding a deployment area of an airbag when the airbag is deployed and expanded. <P>SOLUTION: The airbag device for the driver's seat includes: a tearing portion formed on the airbag cover, and having both ends reach at a peripheral edge portion 22 of the airbag cover through a center portion 21; a plurality of cover pieces 25 formed on the airbag cover by the tearing portion, and divided when the airbag device for the driver's seat is actuated; and a plurality of rotating members 30 surrounding the airbag and arranged in a circumferential direction at proper intervals between the airbag cover and a mounting member, mounted to the cover pieces at one end portions, and coupled to the mounting member through a hinge portion 8 at the other ends so as to rotate outward. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an airbag device for a driver's seat mounted on a steering wheel.

  For example, Patent Literature 1 is known as an airbag device for a driver's seat including a retainer, an inflator attached to the retainer, an airbag that is inflated by gas from the inflator, and a module cover that covers the airbag.

In the airbag device disclosed in Patent Document 1, the module cover that is mounted on the retainer so as to cover the airbag is configured by combining a plurality of cover pieces. Each of these cover pieces has an L shape having a fan-shaped front portion facing the occupant and a side portion erected from the arc-shaped peripheral edge of the front portion. The module cover is fixed to the retainer by covering the periphery of the retainer with the side surface portion of the module cover in which the plurality of cover pieces are combined, and tightening the outside of the side surface portion of the module cover with a tape band. In the airbag device, when gas is ejected from the inflator, the airbag is inflated and presses the module cover. Then, the front portion of the cover piece is deformed and opened in a flap shape, so that the airbag is deployed and inflated between the steering and the occupant.
JP 2000-318558 A

  In the above background art, only the front surface of the module cover is deformed by pressing from the airbag, but the side surface of the module cover is fixed to the retainer, so the inner diameter of the opened module cover is the module cover. The diameter was almost the same as or narrower than the inner diameter of the peripheral edge.

  For this reason, since the deployment area of the airbag is equal to or less than the inner diameter of the peripheral edge of the module cover, there is a tendency that the airbag is vigorously deployed and inflated toward the occupant. In particular, in consideration of the case where the occupant is in an unexpected position, there is a problem that consideration must be given to reduce the occupant's injury due to the airbag that is vigorously deployed and inflated.

  The present invention was devised in view of the above-described conventional problems, and provides an airbag device for a driver's seat that can widen an opening area of an airbag cover and expand an airbag deployment area when the airbag is deployed and inflated. The purpose is to do.

  An airbag device for a driver's seat according to the present invention includes an airbag that is deployed and inflated by gas from an inflator, a mounting member to which the airbag is attached, and the airbag that is covered and cleaved by deployment and inflation of the airbag. An airbag device for a driver's seat provided with an airbag cover that is formed on the airbag cover, and through the center portion thereof, a cleaving portion whose both ends reach the peripheral edge of the airbag cover; A plurality of cover pieces that are formed on the airbag cover by the cleavage portion and are divided when the driver airbag device is operated, and the airbag cover and the mounting member are surrounded by the airbag. Arranged at appropriate intervals in the circumferential direction, one end thereof is attached to each of the cover pieces, and the other end thereof is interposed via a hinge portion. Te, characterized in that it comprises a plurality of rotating members which are rotatably connected toward its outward-attached said mounting.

  Both the attachment member and the rotation member are preferably made of metal.

  The mounting member and the rotating member are both made of synthetic resin, and are preferably integrally molded via a hinge portion made of synthetic resin.

  In the airbag device for a driver's seat according to the present invention, when the airbag is deployed and inflated, the opening area of the airbag cover can be increased and the deployment area of the airbag can be expanded.

  Hereinafter, a preferred first embodiment of an airbag device for a driver's seat according to the present invention will be described in detail with reference to the accompanying drawings. The airbag device 1 for a driver's seat according to the present embodiment basically has an airbag 3 that is deployed and inflated by a gas from the inflator 2 and an airbag 3 as shown in FIGS. 1 to 5. An attachment member 10 and an airbag cover 20 that covers the airbag 3 and is cleaved by deployment and inflation of the airbag 3 are provided. The airbag cover 20 is formed with a cleaving portion whose both ends reach the peripheral portion 22 of the airbag cover 20 via the central portion 21 thereof. Further, the airbag cover 20 is formed with a plurality of cover pieces 25 that are divided by the cleaving portion when the driver airbag device 1 is operated. Between the airbag cover 20 and the attachment member 10, each one end is attached to each cover piece 25, and each other end is rotated outwardly to the attachment member 10 via the hinge portion 8. A plurality of pivot members 30 that are freely connected are disposed at appropriate intervals in the circumferential direction while surrounding the airbag 3.

  The attachment member 10 is made of metal and includes a bottom 12 and three side walls 13 as illustrated in FIG. The bottom portion 12 is formed in a substantially circular plane shape, and an inflator insertion port 12a is formed at the center thereof. The three side walls 13 are formed so as to rise from the periphery of the bottom portion 12 at an appropriate interval from the periphery of the bottom portion 12. A first hinge hole 14 is formed below each side wall 13 so as to protrude outward from the right end and the left end of the side wall.

  As illustrated in FIG. 2, three side opening portions 15 are formed on the periphery of the bottom portion 12 between the adjacent side walls 13 and the side walls 13. The folded airbag 3 is housed inside the attachment member 10. An upper opening 11a through which the airbag 3 is deployed and inflated is formed above the bottom 12.

  As illustrated in FIGS. 2 and 3, an opening 6 a for inserting the inflator 2 is formed in the airbag 3 so as to overlap with the attachment ring 6 from the inside of the airbag 3. The inflator 2 having the flange 2a is inserted into the bottom 12 from below the inflator insertion port 12a. Above the bottom portion 12, the inflator 2 is inserted from the opening 6 a and the airbag 3 is disposed so as to cover the inflator 2. The inflator 2 and the airbag 3 are fixedly attached to the attachment member 10 by fastening the flange 2 a and the attachment ring 6 to the bottom portion 12 with bolts 7.

  Metal rotating members 30 are respectively disposed in the three side openings 15. The peripheral side wall 11 is constituted by the three side walls 13 and the three rotating members 30. The rotating member 30 includes a lower bracket 32, an upper bracket 31, and a horn switch 40 described later.

  As shown in FIGS. 1, 2 and 3, the lower bracket 32 is formed as an arc-shaped metal wall along the periphery of the bottom portion 12, and at the center in the left-right direction, the lower bracket 32 is provided inside. A first dent 32a is formed by being recessed into a bow shape. The first recess 32a has a lower end protruding downward and abutting against the bottom 12 so that the first depression 32a has an inward fall prevention projection 32b for preventing the lower bracket 32 from falling down and rattling. It is formed. A holding portion 32c for holding the horn switch 40 is formed at the upper end of the first recess portion 32a in a substantially L-shaped side section. A first hole 32d is formed at the bottom of the holding portion 32c. A second hinge hole 35 is formed below the lower bracket 32 so as to protrude outward from the right end portion and the left end portion thereof.

  On the other hand, the upper bracket 31 is formed with an arc-shaped side wall portion 31 a along the periphery of the bottom portion 12. The side wall portion 31a is formed with a second dent portion 31b in which the center in the left-right direction is arched inward. The second recess 31b is formed with a pressing portion 31c at the lower end thereof, which is substantially the same shape as the bottom of the holding portion 32c and presses the horn switch 40 held by the holding portion 32c from above. A second hole portion 31d is formed in the pressing portion 31c. At the upper end of the side wall portion 31a, a flange portion 31e that protrudes inward from the side wall portion 31a is formed. The side wall portion 31 a is formed with a conducting portion 31 f that extends from the right end portion of the side wall portion 31 a and contacts the left end portion of the adjacent upper bracket 31. The conducting portion 31f may be formed so as to be in contact with the right end portion of the adjacent upper bracket 31 from the left end portion of the upper bracket 31.

  A horn switch 40 that closes and opens a horn circuit (not shown) is disposed between the lower bracket 32 and the upper bracket 31 by pressing in the vertical direction. Inside the horn switch 40, a coil spring 41 that is elastically deformable in the vertical direction is provided. Above the coil spring 41, an upper conductive portion 42 that contacts the pressing portion 31c is formed. An upper contact portion 42 a is formed on the upper conductive portion 42 by hanging from the edge portion.

  On the other hand, below the coil spring 41, a lower conductive portion 43 that is in contact with the holding portion 32c is formed. A lower contact portion 43a is formed in the lower conductive portion 43 so as to rise from the edge thereof. A through hole 44 penetrating in the vertical direction is formed at the center of the horn switch 40.

  The lower bracket 32, the horn switch 40, and the upper bracket 31 are arranged below the holding portion 32c from the nut body 33 that passes through the first hole portion 32d, the through hole 44, and the second hole portion 31d, and the second hole of the pressing portion 31c. The bolts 34 are inserted into the nut body 33 from the side of the part 31d. The upper bracket 31 is attached to the lower bracket 32 and consequently to the attachment member 10 in a floating state when the coil spring 41 of the horn switch 40 is biased upward.

  By pressing the pressing portion 31c of the upper bracket 31, the horn switch 40 is compressed against the elastic force of the coil spring 41, and the horn switch 40 is brought into contact with the upper contact portion 42a and the lower contact portion 43a. The horn circuit is closed and the horn is blown.

  Further, since the adjacent upper brackets 31 are electrically connected to each other via the conductive portion 31f, the horn circuit is closed regardless of which horn switch 40 is pressed.

  In this embodiment, the lower conductive portion 43 of the horn switch 40 is grounded to the vehicle body from the lower bracket 32 through the mounting member 10, and the minus side is in an electrically connected state. Absent. And since the upper bracket 31 with which the upper conduction | electrical_connection part 42 of the horn switch 40 is contact | connected is mutually connected through the conduction | electrical_connection part 31f, what is necessary is just to carry out the plus side wiring at least in any one upper bracket 32. .

  The second hinge hole 35 of the lower bracket 32 and the first hinge hole 14 of the side wall 13 are connected to each other via a rotation shaft 36. The hinge portion 8 is configured by the second hinge hole 35, the first hinge hole 14, and the rotation shaft 36. The rotating member 30 is connected to the mounting member 10 so as to be rotatable outward by the action of the inward-falling projection 32b.

  An airbag cover 20 is mounted on the upper opening 11 a of the attachment member 10. The airbag cover 20 is formed of a synthetic resin material, and is formed in a substantially circular planar shape having an inner diameter slightly larger than the outer diameter of the upper opening 11a. The airbag cover 20 includes a dish-shaped central portion 21 and a peripheral edge portion 22 that is formed around the central portion 21 and that extends gently downward from the end of the central portion 21. An annular inner wall portion 23 is suspended from the air bag cover 20 inside the peripheral edge portion 22. The airbag cover 20 is fixed with a screw 26 from the side of the flange 31e, with the flange 31e of the upper bracket 31 superimposed on the inner side of the central portion 21.

  The airbag cover 20 is fixed by screws 26 with the inner side of the inner wall portion 23 and the side wall portion 31a of the upper bracket 31 being overlapped. The airbag cover 20 fixed to the upper bracket 31 is supported in a floating state with respect to the attachment member 10 by a coil spring 41 of the horn switch 40.

  Above the pressing portion 31c of the upper bracket 31, a pressing piece 23a that presses the pressing portion 31c is formed by cutting the inner wall portion 23 so short that it does not contact the pressing portion 31c.

  When the airbag device 1 for the driver's seat presses the airbag cover 20, the pressing piece 23a presses the horn switch 40 through the pressing portion 31c, thereby closing the horn circuit and blowing the horn.

  The airbag cover 20 is formed with a cleaving portion so that the airbag cover 20 is cleaved by the pressure of the inflating airbag 3. In the present embodiment, the cleavage portion is formed as a cleavage groove 24 (so-called tear line). The cleavage groove 24 is cut in a state where the inner side is notched and the outer side is left thin. The cleavage groove 24 is engraved on a line where both ends reach the peripheral edge 22 of the airbag cover 20 via the central portion 21 of the airbag cover 20. Specifically, as shown in FIGS. 1 and 3, the cleavage groove 24 includes a lateral cleavage groove 24 a extending from the peripheral edge right end 22 b through the central portion 21 to the peripheral edge left end 22 c and a lateral cleavage. It is formed from a vertical cleavage groove 24b extending from a substantially middle position of the groove 24a to the front end 22a of the peripheral edge. The left-right direction crevice groove 24a and the up-and-down direction crevice groove 24b divide the airbag cover 20 into three for every field where each rotation member 30 was attached.

  When the driver airbag device 1 is operated, the left and right direction cleavage grooves 24a and the vertical direction cleavage grooves 24b are cleaved, and the regions are divided as cover pieces 25, respectively. When the airbag cover 20 is divided into cover pieces 25, the rotating member 30 fixed to the airbag cover 20 can be rotated with respect to the attachment member 10 and rotated outward. Moved. Then, the cover piece 25 is rotated outward together with the rotating member 30, so that the side opening 15 is opened together with the upper opening 11a when the airbag 3 is inflated.

  Next, the operation of the driver's seat airbag device 1 according to the first embodiment will be described. In production, the inflator 2 and the airbag 3 are attached to the attachment member 10. The rotating member 30 is assembled by disposing the horn switch 40 between the holding portion 32c and the pressing portion 31c and fixing the lower bracket 32 and the upper bracket 31 with the nut body 33 and the bolt body 34. The flange 31e of the upper bracket 31 and the inner side of the airbag cover 20 are fixed with screws 26, and the side wall 31a of the upper bracket and the inner side of the inner wall portion 23 of the airbag cover 20 are fixed with screws 26 to rotate. The airbag cover 20 is fixed to the member 30. A rotation member in which the airbag cover 20 is fixed to the attachment member 10 by connecting the first hinge hole 14 of the attachment member 10 and the second hinge hole 35 of the rotation member 30 via a rotation shaft 36. 30 is attached.

  The driver-seat airbag device 1 is fixed to the vicinity of the center of the steering wheel 60 via the attachment member 10.

  When the vehicle collides, the airbag 3 is deployed and inflated by the gas ejected from the inflator 2. As the airbag 3 is deployed and inflated, the left-right direction cleavage groove 24 a and the up-down direction cleavage groove 24 b are cleaved, and the airbag cover 20 is completely divided into three cover pieces 25.

  When the airbag cover 20 is divided into the cover pieces 25, the rotating member 30 fixed to the airbag cover 20 can be rotated with respect to the attachment member 10, and together with the cover pieces 25, outward. It is turned toward. Thereby, the cover piece 25 attached to each rotating member 30 falls down through the space between the steering spokes 61 from above the steering wheel 60 on the occupant facing side, as illustrated in FIG. 5B. . When the cover piece 25 is cleaved outward together with the rotating member 30, the side opening 15 is opened together with the upper opening 11 a of the attachment member 10.

  As a result, the deployment area of the airbag 3 is expanded and the momentum of the airbag 3 jumping out to the occupant side can be reduced as compared with the conventional driver airbag apparatus 1 in which only the upper opening 11a is opened. It is possible to reduce the risk of occupant injury.

  In particular, when an occupant jumps out to the side of the inflating airbag 3 due to a vehicle collision or the like, the impact received from the airbag 3 is doubled and the risk of injury is increased. However, the driver's seat airbag device 1 according to the present embodiment reduces the momentum of the airbag 3 jumping out to the occupant side, and the opened side opening 15 allows the airbag 3 to be inflated to the steering wheel 60. It is possible to escape to the area on the back side, and the risk of occupant injury can be reduced.

  In addition to this, in the present embodiment, the airbag cover 20 that has been cleaved and divided by the expansion and expansion of the airbag 3 is fixed to the rotating member 30 as the cover piece 25, respectively. The possibility that 20 is scattered can be reduced.

  In addition, by forming the inward-falling projection 32b on the lower bracket 32, it is possible to prevent the rotating member 30 from rattling, to prevent poor touch when the horn switch 40 is pressed, and to enable smooth operation of the horn switch 40. Become.

  In this embodiment, the horn switch 40 is a part of the rotating member 30 and is disposed between the upper bracket 31 and the lower bracket 32. However, the horn switch 40 may be installed on the pressing portion 31c.

  In the present embodiment, the three side walls 13 are formed on the mounting member 10, but the number of the side walls 13 is not limited to three as long as it is a plurality. Similarly, the number of the side openings 15 and the number of rotating members 30 disposed in the side openings 15 is not limited to three. And the upper bracket 31, the lower bracket 32, and the horn switch 40 which comprise the rotation member 30 are not restricted to three. In this case, with respect to the airbag cover 20 attached to the rotating member 30, it is preferable to form the cover pieces 25 divided by the cleavage grooves 24 corresponding to the number of the rotating members 30.

  In particular, in the present embodiment, the cover piece 25 is divided in three directions between the steering spokes 61 of the steering wheel 60, so that the number of the cover piece 25 and the rotating member 30 is made to correspond to the number of the steering spokes 61. However, it is not necessary to make the cover piece 25 and the rotating member 30 correspond to the number of the steering spokes 61, and the number of the cover piece 25 and the rotating member 30 may be plural.

  In the present embodiment, the tearing portion is the tearing groove 24 (the tear line) in which the inner side is notched and the outer side is left thin, but a form that is also referred to as a tear line, for example, the central portion of the airbag cover 20 is formed. By using a technique such as laser irradiation on the line that reaches both ends of the peripheral edge, a hole that passes through the airbag cover 20 or a hole that does not pass through, or a slit is placed at an appropriate interval to form a dotted line or It may be formed in a chain line shape. In addition, the shape of the cleaving portion is not limited to these, and the airbag cover 20 may be divided into a plurality of cover pieces 25. Therefore, any shape may be used as long as it can be cleaved.

  Next, 2nd Embodiment of the airbag apparatus 1 for driver's seats concerning this invention is described with reference to FIGS. Only differences from the first embodiment will be described.

  Both the attachment member 10 and the rotation member 30 are made of synthetic resin, and are integrally molded via a hinge portion 8 made of synthetic resin.

  The attachment member 10 and the rotation member 30 are formed of a hard or soft synthetic resin material. As shown in FIG. 6, the attachment member 10 includes a bottom portion 12 and a peripheral side wall portion 11 that is integrally formed along the periphery of the bottom portion 12. Side walls 13 and lower brackets 32 are alternately formed on the peripheral side wall portion 11. Between the bottom portion 12 and the lower bracket 32, the hinge portion 8 is integrally formed with the bottom portion 12 at an appropriate length so that the lower bracket 32 can rotate along the periphery of the bottom portion 12.

  As shown in FIG. 8, the hinge portion 8 is a type (a) in which a side section is formed in an approximately L shape and the corner portion 50 is formed in a thin shape, and the corner portion 50 is diagonally scraped off from the outside. The shape (b) is formed, and the corner portion 50 is formed in various shapes such as the type (c) in which the corner portion 50 is formed in the same thickness as the bottom portion 12 and the peripheral wall 13.

  As shown in FIG. 6, the lower bracket 32 is formed by a region partitioned by the fracture line 51 in the peripheral side wall portion 11. Specifically, the lower bracket 32 includes a pair of first break lines 51a that are appropriately cut downward from the upper end edge of the peripheral side wall portion 11 at an interval longer than the hinge portion 8, and a first break. The line 51 a is formed in a region partitioned by a pair of second break lines 51 b formed obliquely downward from the lower end of the line 51 toward both ends of the hinge 8 and the hinge 8. The breaking line 51 is formed by being cut into a groove shape so as to be broken by the expansion and inflation of the airbag 3.

  A holding portion 32 c that holds the horn switch 40 is formed at the upper end portion of the lower bracket 32 by projecting the periphery thereof outward.

  In the driver's seat airbag device 1 according to the second embodiment, the attachment member 10 and the lower bracket 32 of the rotating member 30 are made of synthetic resin and are integrally molded via the hinge portion 8. During the operation of the driver airbag device 1, the tear groove 24 of the airbag cover 20 is torn and the fracture line 51 of the mounting member 10 is also torn.

  In the airbag device 1 for a driver's seat, the rotation member 30 fixed to the airbag cover 20 is rotated with respect to the attachment member 10 by breaking the break line 51 as the cover piece 25 is divided. It becomes possible and is rotated outward together with the cover piece 25 at its upper end. When the cover piece 25 is cleaved outward together with the rotating member 30, the side opening 15 is opened together with the upper opening 11 a of the mounting member 10, so that the opening area is widened and the airbag 3 is expanded. Thus, it is possible to reduce the momentum of the airbag 3 that protrudes upward and faces the occupant, and to reduce the risk of injury to the occupant.

  In addition, since the attachment member 10 and the rotation member 30 are also formed of a synthetic resin material, the upper opening portion 11a and the side opening portion 15 are opened at a speed higher than that of a metal member. For this reason, it can further relieve | moderate that the airbag 3 which expand | swells instantaneously jumps out to the passenger | crew side vigorously. Moreover, by integrally molding with a synthetic resin material, the number of parts can be reduced, and parts can be formed easily and inexpensively. And since the side wall 13 and the lower bracket 32 are connected by the fracture line 51, it is possible to provide a function for preventing the turning member 30 from falling down and preventing rattling.

  In this embodiment, since the attachment member 10 and the rotation member 30 are made of synthetic resin, it is preferable to configure the horn circuit separately. Further, by forming the mounting member 10 and the rotating member 30 with a conductive synthetic resin material, it is also possible to form a horn circuit including the mounting member 10 and the rotating member 30 as in the first embodiment. It becomes.

  Next, a modified example of the driver airbag device 1 according to the second embodiment will be described with reference to FIG. In FIG. 7A, the lower bracket 32 includes a pair of first slits 52 a that are appropriately formed downward from the upper end edge of the peripheral side wall portion 11 at intervals longer than the hinge portion 8, and the first bracket 52. The slit 52 a is formed in a region partitioned by a pair of second slits 52 b formed obliquely downward from the lower end of the slit 52 toward both ends of the hinge 8 and the hinge 8. The first slit 52a and the second slit 52b constitute a slit 52.

  In FIG. 7B, the lower bracket 32 includes a pair of first slits 52 a formed from the upper end edge of the peripheral side wall portion 11 to the lower end edge downward at a longer interval than the hinge portion 8, and the first bracket 52. The second slit 52b is formed from the lower end portion of the slit 52a toward the both ends of the hinge portion 8 along the periphery of the bottom portion 12, and the region is defined by the hinge portion 8.

  In FIG. 7C, the slits 52 having the same shape as the above-described (b) are formed. In addition, as shown in FIG. 5C, a fracture piece 52c that connects the upper end of the lower bracket 32 and the upper end edge of the side wall 13 is formed at the upper end of the first slit 52a. The broken piece 52c can have the function of preventing rattling and falling down of the rotating member 30 in which the horn switch 40 is disposed.

  The effect of the said modification is the same as the effect of the airbag apparatus 1 for driver's seats concerning 2nd Embodiment.

  In the first and second embodiments and the modifications described above, the rotating member 30 is formed by including the lower bracket 32, the upper bracket 31, and the horn switch 40, but is formed only by the lower bracket 32. May be. In this case, the airbag cover 20 is fixed to the upper end portion of the lower bracket 32 for each region constituting each cover piece 25.

  The driver-seat airbag device described above is a preferred example of the present invention, and other embodiments can be implemented or performed by various methods. In particular, the present invention is not limited to the detailed shape, size, configuration, and the like of the components shown in the accompanying drawings unless otherwise stated in the present specification. In addition, expressions and terms used in the present specification are for the purpose of explanation, and are not limited thereto unless otherwise specified.

1 is a perspective view showing a driver's seat airbag device according to a first embodiment of the present invention. It is a sectional side view which shows the airbag apparatus for driver's seats of FIG. It is a disassembled perspective view which shows the airbag apparatus for driver's seats of FIG. FIG. 2 is a plan view showing a state in which the driver airbag device of FIG. 1 is attached to a steering wheel. FIG. 2 is a side view showing a state in which the driver airbag device of FIG. 1 is attached to a steering wheel. It is a disassembled perspective view of the airbag apparatus for driver's seats concerning 2nd Embodiment of this invention. It is a perspective view which shows the modification of the attachment member of the airbag apparatus for driver's seats of FIG. It is a sectional side view of the modification of the hinge part of the airbag apparatus for driver's seats of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Driver airbag apparatus 2 Inflator 3 Airbag 7 Bolt 8 Hinge part 10 Attachment member 11 Peripheral side wall part 13 Side wall 20 Airbag cover 25 Cover piece 30 Turning member 31 Upper bracket 32 Lower bracket 32b Inclination prevention protrusion 36 times Driving shaft 60 Steering

Claims (3)

For a driver's seat comprising an airbag that is deployed and inflated by gas from an inflator, a mounting member to which the airbag is attached, and an airbag cover that is covered with the airbag and that is torn by deployment and inflation of the airbag An airbag device,
A cleavage portion formed on the airbag cover, via its central portion, with both ends reaching the peripheral edge of the airbag cover;
A plurality of cover pieces formed on the airbag cover by the cleaving portion and divided when the driver airbag device is activated;
Between the airbag cover and the mounting member, the airbag cover is disposed at an appropriate interval in the circumferential direction while surrounding the airbag, and one end thereof is attached to each of the cover pieces. An airbag device for a driver's seat, comprising: a plurality of rotating members whose end portions are rotatably connected to the mounting member outwardly via hinges.   The driver seat airbag device according to claim 1, wherein both the attachment member and the rotation member are made of metal.   2. The driver airbag apparatus according to claim 1, wherein the attachment member and the rotation member are both made of synthetic resin and are integrally formed through a hinge portion made of synthetic resin.

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