JP6157283B2 - Airbag device - Google Patents

Description

  The present invention relates to an airbag device including an engagement member that engages an engagement portion.

  Conventionally, a module main body, which is a main body provided with a folded airbag and an inflator for supplying gas to the airbag, is attached to a boss portion which is a support portion constituting a part of a steering wheel as a steering wheel of an automobile. An airbag device configured as described above is used.

  As such an airbag device, the boss portion is provided with a snap lock spring (wire) as an engaging member, and a hook which is an engaging portion protruding from the module body is pushed in the handle shaft direction to the snap lock spring. The structure which attaches a module main body to a boss | hub part by one-touch by hooking is known (for example, refer patent document 1).

Japanese Patent No. 3566693 (page 7-10, Fig. 1-3)

  In such a configuration, when removing the airbag device once attached to the boss portion, the snap lock spring is pushed against the urging force and elastically deformed using, for example, an engagement release tool such as a driver. Thus, the snap lock spring is separated from the front end side of the hook so that the engagement of the hook can be released. In such an operation, the driver comes off without properly contacting the snap lock spring, and the driver is placed in the peripheral module part such as the inflator, connector, wire harness or horn switch contact part or spring located in the periphery. It is desirable to avoid contact.

  The present invention has been made in view of such points, and the module portion of the disengagement tool when the disengagement tool pushes the contact portion to disengage the engagement portion by the engagement member. An object of the present invention is to provide an airbag device that can prevent contact with the airbag.

The airbag apparatus according to claim 1 is a case in which a folded airbag is stored, a main body portion including a module portion disposed in the case, a support portion to which the main body portion is attached, the case, and the case. An engagement part provided on at least one of the support parts, an engagement member provided on the other of the case and the support part and engaging the engagement part, and the case and the support part A contact portion that is disposed at a position facing each other and that can be pushed to release the engagement of the engagement portion by the engagement member, and a position between the contact portion and the module portion. And the engagement part tool pushed along the direction which pushes the said contact part and the guard part which prevents the contact with the said module part are comprised.

  According to a second aspect of the present invention, there is provided the airbag apparatus according to the first aspect, further comprising a guide portion that guides the disengagement tool to the contact portion.

According to the airbag device of the first aspect, the contact portion is pushed between the contact portion disposed at a position where the case and the support portion face each other and the module portion of the main body portion. The engagement portion is pushed by the engagement member, and the contact portion is pushed by the engagement release tool to release the engagement of the engagement portion by the engagement member. It can be reliably prevented by the guard portion that the disengagement tool pushed into is slipped and contacts the module portion.

According to the airbag device of the second aspect, in addition to the effect of the airbag device of the first aspect, the engagement release tool is guided to the contact portion by the guide portion, whereby the engagement release tool is moved to the guard portion. The engagement released by pushing the contact part with the engagement release tool and releasing the engagement of the engagement part by the engagement member. Contact of the tool to the module part can be prevented more reliably.

The main-body part of 1st Embodiment of the airbag apparatus of this invention is shown, (a) is a top view shown from the bottom, (b) is sectional drawing of the II equivalent position of (a), (c) is It is sectional drawing of the II-II equivalent position of (a). It is a perspective view which shows a part of airbag apparatus same as the above. It is a perspective view which shows the state before the attachment to the support part of the main-body part of an airbag apparatus same as the above. It is a front view which shows the handle | steering_wheel provided with the airbag apparatus same as the above. It is a perspective view which shows a handle same as the above from the lower part. It is sectional drawing which shows 2nd Embodiment of the airbag apparatus of this invention. It is sectional drawing which shows 3rd Embodiment of the airbag apparatus of this invention.

  Hereinafter, a first embodiment of an airbag device of the present invention will be described with reference to the drawings.

1 to 5, reference numeral 10 denotes a steering wheel as a steering wheel. The steering wheel 10 is disposed in front of an occupant in a driver's seat of an automobile, and a steering wheel main body 11 serving as a support portion as a steering wheel main body, and the steering wheel. such is composed of a module body 12 is a body portion mounted on the passenger side of the wheel body 11. The steering wheel main body 11 and the module main body 12 constitute an airbag device 13.

  The steering wheel 10 is attached to a steering shaft as a steering device (not shown) that is normally provided in an inclined state. Hereinafter, the module body 12 side is referred to as the occupant side, the front side or the rear side, the steering shaft side. Is the vehicle body side, back side or front side, the longitudinal direction along the steering shaft is the axial direction, and other directions such as the longitudinal direction and the vertical direction are described based on the straight direction of the vehicle body on which the steering wheel 10 is provided. To do.

  The steering wheel body 11 includes an annular rim portion (ring portion) 15, a boss portion (mount portion) 16 as a support portion located inside the rim portion 15, and the rim portion 15 and the boss portion 16. For example, two spoke parts 17 in this embodiment.

  The steering wheel body 11 includes a metal core 21, a soft cover 22 that integrally covers a part of the core 21, and a cover as a cover that covers the back side of the core 21. Body 24 and so on.

  The cored bar 21 corresponds to the rim part 15, the boss part 16 and the spoke part 17, and includes a rim cored bar (not shown), a bossed cored bar 26 as a support part body, and a spoked cored bar 27 as a connecting part as a whole. It is formed substantially symmetrical.

  The boss cored bar 26 is also referred to as a boss plate or the like. The bossed cored bar main body 32 is a supporting body integrally including a cylindrical boss 31 fitted to the steering shaft. An extending portion 33 extending from the plurality of engaging claws 34 as an engaging portion for attaching and holding the module main body 12 to the steering wheel main body 11 and the module main body. Positioning hole 35 as an attaching portion for positioning 12 with respect to steering wheel body 11, a plurality of fixed contacts 36 constituting a horn switch, and a plurality of spring receiving portions 37 that elastically receive module body 12 I have. The boss core 26 is formed integrally with the annular rim core and the spoke core 27 radially disposed on both sides by inserting the boss 31 in the mold and insert molding such as magnesium alloy. ing.

  The boss cored bar main body 32 is formed in a longitudinal shape on both sides, and both sides are continuous with the spoke cored bar 27.

  The extending portion 33 includes side extending portions 38 and 38 extending from both upper side portions of the boss core metal main body portion 32, and a lower extension extending from the lower central portion of the boss core metal main body portion 32. Parts 39 and 39.

  Each side portion extending portion 38 extends in the left-right direction at a position substantially flush with the upper edge portion of the boss core metal body portion 32, and is spaced above the spoke core metal 27.

  The lower extension portions 39 are spaced apart from each other on both sides of the central portion of the boss core metal main body portion 32 in both sides, and extend downward in the longitudinal direction.

  The engaging claw portions 34 include a side engaging claw portions 41 and 41 which are a pair of side engaging portions located at the distal end portion on each side extending portion 38 and a lower end portion of each lower extending portion 39. And a lower engaging claw portion 42 that is a lower engaging portion that connects the two.

  Each side portion engaging claw portion 41 can also be called a one-touch hook, and is formed by being folded back toward the central portion side in both sides with respect to each side portion extending portion 38.

  The lower engagement claw portion 42 can be called a one-touch hook, and is formed by being folded back upward with respect to each lower extension portion 39.

  The engaging claws 41 and 42 (engaging claw portions 34) are engaged with the module main body 12 so that the module main body 12 is relatively positioned with respect to the steering wheel main body 11 (boss metal core 26). It is designed to keep it in the front direction.

  The positioning holes 35 are formed on both sides of the boss core metal main body 32 with the boss 31 interposed therebetween, penetrating in the front-rear direction. Accordingly, the positioning holes 35 and 35 position the module main body 12 in the vertical and horizontal directions with respect to the steering wheel main body 11 (boss core metal 26) and guide the module main body 12 so as to be movable in the front-rear direction. Yes.

  The fixed contact 36 is formed of a conductive metal member or the like, and is provided with one side fixed contact 47, 47 located at a continuous portion with the spoke core 27 on both sides of the boss core main body 32. And a lower fixed contact (not shown) located in the vicinity of the lower end of the extended portion 33, and protrudes toward the front side.

  The spring receiving portions 37 are disposed in the vicinity of the fixed contact 36, respectively.

  The spoke mandrel 27 is formed on both sides of the upper side of the boss mandrel main body 32 and extending in the left and right directions with the lower position of each engaging claw 34 as a base end. It is bent into a vertical wall shape so as to gradually protrude in the front direction from one end continuous with the portion 32 to the other end continuous with the rim cored bar. The spoke mandrel 27 is provided with holes 51 formed so as to penetrate the cover body 24 and the both sides of the module body 12, that is, in the middle of both ends, along the left and right sides. Yes.

  The covering portion 22 is softly formed of urethane, for example, soft foamed polyurethane, so as to cover the outer peripheral portion of the rim core metal and the outer peripheral portion of the spoke core metal 27 on the rim portion 15 side.

  The cover body 24 is also called a body cover, a lower cover, or a back cover, and covers the back side, that is, the back side of the boss portion 16 side of the steering wheel body 11 and the boss portion 16 side of the spoke portion 17, and has an insulating property. A thermoplastic resin is integrally formed by injection into a mold. The cover body 24 is provided with guide hole portions 53 formed on both side portions facing the outer side portion of the spoke mandrel 27 so as to penetrate along the left and right side directions. These guide hole portions 53 face the side of each hole portion 51 of the spoke metal core 27, and communicate with these hole portions 51 to form a tool access hole 54 as a guide portion. Therefore, the tool access hole 54 is formed along the left and right side directions.

  On the other hand, the module main body 12 includes a base plate 61 as a housing body and an airbag cover 62 as a covering body that houses a folded airbag (not shown), an inflator 65 disposed in the case 64, and There is no retainer. Since the module body 12 is formed substantially symmetrically, only one side is shown in FIG. 1 and the other side is not shown for the sake of clarity.

  The base plate 61 is also called a back plate or a back holder, and also serves as a horn plate of a horn mechanism, and is integrally injection-molded with, for example, a synthetic resin. The base plate 61 includes a substrate portion 66 as a case body, and a peripheral wall portion 67 raised to the front side over the entire peripheral portion on the surface side of the substrate portion 66.

  The base plate portion 66 is provided with an inflator mounting portion 69 at a substantially central portion. Although not shown, the inflator mounting portion 69 is provided with a circular inflator mounting hole and 4 surrounding the inflator mounting hole. A mounting hole is formed at each location. The board portion 66 is integrally provided with a fixing portion 70 as an attachment mechanism for attaching the module main body 12 to the steering wheel main body 11 so as to be able to advance and retreat.

  These fixing portions 70 are provided on both side portions of the base plate 61 (as first and second attachment mechanisms), respectively, and on the lower side portion of the base plate (third And a lower fixing portion 74 (as an attachment mechanism). The fixing portions 73, 73, and 74 each include a wire 76 as an engaging member, a mounting base portion 77 integral with a substrate portion 66 to which the wire 76 is attached, and a coil spring 78 as a biasing means. ing.

  Each wire 76 can also be called a one-touch wire, and is formed of an elastically deformable wire, and a pair of linearly engaging receiving portions 81 and one end portions of the engaging receiving portions 81 are curved. An elastic connecting portion 82 as an engaging biasing means for connecting and biasing the engagement receiving portions 81 in directions away from each other, and contact portions where the other ends of the engagement receiving portions 81 are bent, respectively. As an operation unit 83. That is, these wires 76 are formed in a substantially U shape. The wires 76 are provided in one of the engagement receiving portions 81 and the engagement claw portions 34 (engagement claw portions 41, 41, 42) are engaged with the one engagement receiving portion 81. Each wire 76 is elastically deformed so that the operation portion 83 (one operation portion 83) approaches the operation portion 83 (the other operation portion 83) provided in the other engagement receiving portion 81, thereby engaging. The engagement of the claw part 34 (engagement claw parts 41, 41, 42) can be released. In particular, each wire 76 disposed in each side fixing portion 73 uses an engagement releasing tool T such as a minus driver inserted from the outside of the cover body 24 (the steering wheel 10) through the tool access hole 54. The engaging claw portion 34 (each side engaging claw portion 41) is engaged by pushing the operation portion 83 against the biasing force so that the one operating portion 83 approaches the other operating portion 83. Is to be canceled.

  Each mounting base 77 has an opening 85 as an engagement member mounting portion for mounting the wire 76, an exposure opening 86 as a guide opening for exposing the operation portions 83 and 83 of the wire 76, and a coil spring 78. A spring receiving portion 87 as a biasing means mounting portion for mounting and a movable contact 88 are provided. Further, a guide projection 89 for guiding the module main body 12 relative to the steering wheel main body 11 protrudes from the attachment base 77 of each side fixing portion 73.

  Each opening 85 is opened across the substrate portion 66 and the peripheral wall portion 67 of the base plate 61. That is, these openings 85 are formed by cutting out the outer edge of the base plate 61. In addition, these openings 85 bring the engagement receiving portion 81 forming a pair of wires 76 into a state of being close to each other against the urging force, and one of the engagement receiving portions positioned relatively outside the base plate 61. In a state where the portion 81 can move in the direction approaching the other engagement receiving portion 81 relatively inside the base plate 61 against the biasing force and a part of the one engagement receiving portion 81 is exposed. I support it. Then, the opening 85 of the side fixing portion 73 supports the engagement receiving portion 81 in the vertical direction along the surface direction of the substrate portion 66 of the base plate 61 as the longitudinal direction, and the opening 85 of the lower fixing portion 74 is The engagement receiving portion 81 is supported with both side directions as the longitudinal direction.

  The exposure opening 86 guides and supports the operation portion 83 continuous to the engagement receiving portion 81 in a state where it can be exposed, that is, pushed, and is opened in a slit shape at a position separated from the opening 85. Yes. The exposed opening 86 of each side fixing portion 73 is opened along the left and right sides, that is, along the opening direction of the tool access hole 54, and the exposed opening 86 of the lower fixing portion 74 is opened along the up and down direction. Yes. A guard portion 91 is raised from the substrate portion 66 at a position adjacent to the exposed opening 86 of each side fixing portion 73. Each guard portion 91 prevents the disengagement tool T inserted from the tool access hole 54 from coming into contact with the inflator 65 and the like. It is formed in a plate shape extending along a direction intersecting (orthogonal) with the direction, and is substantially perpendicular to each side fixing portion 73 with respect to the back surface of the substrate portion 66, and each side fixing portion 73 It is located in the vicinity of the end of the exposed opening 86, that is, on the inner side in both sides, and protrudes to the back side from the mounting base 77 and the operation parts 83. That is, the guard portion 91 and the side fixing portions 73 continuously surround the upper side of the operation portion 83 exposed from the exposure opening 86 and the inner side in both side directions in an L shape. Therefore, these guard portions 91 are disposed between the wire 76 and the inflator 65 and the like, and are along the outer edge portion of the inflator mounting portion 69 of the substrate portion 66. Further, each guard portion 91 is disposed in contact with or close to an operation portion 83 (the other operation portion 83) provided in the other engagement receiving portion 81 of the wire 76. Further, these guard portions 91 are located opposite to the tool access hole 54 and have an area larger than the opening area of the tool access hole 54 (hole portion 51 and guide hole portion 53).

  Each movable contact 88 faces the fixed contact 36 of the horn mechanism disposed on the steering wheel main body 11 side, and constitutes a horn switch together with these fixed contacts 36.

  The coil spring 78 is for urging the module main body 12 to the front side with respect to the steering wheel main body 11, one end is held by the spring receiving portion 87, and the steering wheel main body 11 (boss core metal 26) The other end is held by the spring receiving portion 37.

  The peripheral wall portion 67 surrounds the airbag in a folded state, and is located in a direction along the protruding direction of the airbag. A plurality of hook portions 93 and a plurality of locking receiving portions 94 for engaging and holding the airbag cover 62 are provided outside the peripheral wall portion 67, respectively.

  The hook portions 93 are formed in an L shape projecting from the outer surface of the peripheral wall portion 67, and are respectively spaced apart from each other on both sides and the lower portion of the peripheral wall portion 67.

  The latch receiving portion 94 is recessed at a position between the hook portions 93 and 93 across the base plate portion 66 at a position closer to the base end side, that is, the front end side than the hook portion 93 of the peripheral wall portion 67, and opens forward. doing.

  The airbag cover 62 is integrally formed of an insulating synthetic resin, and covers a front plate part 95 as a cover main body that covers a part of the front side of the steering wheel main body 11, and a back side of the front plate part 95. There is provided a mounting plate portion 96 as a mounting wall portion projecting downward in a rectangular tube shape from a certain front side.

  On the front surface which is the back surface of the front plate portion 95, a groove-shaped tear line (not shown) having a small thickness is formed in a substantially H shape in a front view at a position surrounded by the mounting plate portion 96. The bag is configured to be cleaved and deployed along the tear line when the bag is inflated.

  The mounting plate portion 96 is located outside the peripheral wall portion 67 of the base plate 61, and is formed along the outer shape of the peripheral wall portion 67. Further, the mounting plate 96 is provided with an insertion opening 97 into which the hook portion 93 of the base plate 61 is inserted and engaged, and a locking projection 98 to be engaged with each locking receiving portion 94, respectively. Yes.

  The inflator 65 includes a disk-shaped inflator main body 65a and a flange 65b that protrudes from the inflator main body 65a to the outer peripheral side. The inflator body 65a is provided with gas injection ports (not shown) located on the front side of the flange 65b, and the flange 65b is provided with four mounting holes (not shown). Further, a contact portion 65c is provided at the bottom of the inflator main body portion 65a. A wire harness is connected to the contact portion 65c via a connector (not shown), and the inflator 65 is electrically connected to the control device via the wire harness. The module unit M is configured by the operation unit including the inflator 65, the connector, the wire harness, and the like, and the horn switch including the coil spring 78, the movable contact 88, and the like. Therefore, the module part M is located substantially on the extension direction of each tool access hole 54, and each guard part 91 is opened between the module part M and each tool access hole 54. It is located along the direction intersecting (orthogonal) the direction.

  The airbag is formed into a flat bag shape by, for example, a single or a plurality of base fabrics, and although not shown, similar to the inflator mounting portion 69 of the base plate 61, a circular inflator mounting hole, Four mounting holes are provided so as to surround the inflator mounting hole.

  The retainer has a ring shape, and includes a retainer base (not shown) formed of a metal plate or the like, and four mounting bolts 101 fixed to the retainer base. The retainer base is formed with a circular inflator attachment hole at the center. Further, the mounting bolts 101 are provided on the back side so as to surround the inflator mounting holes, and the nuts 102 are respectively screwed together.

  Then, the retainer is inserted inside the airbag, and the airbag is folded into a predetermined shape while the retainer mounting bolt 101 is pulled out from the mounting hole. Further, the airbag cover 62 is covered with the folded airbag, and the insertion opening 97 and the locking protrusion 98 of the mounting plate portion 96 of the airbag cover 62 are connected to the hook portion 93 and the locking portion of the peripheral wall portion 67 of the base plate 61. The hook portion 93 is inserted into and locked into the insertion opening 97 while being inserted into the insertion opening 97 while being inserted into the mounting hole while inserting the retainer mounting bolt 101 into the mounting hole while aligning with the receiving portion 94. Is inserted and locked in the locking receiving portion 94, and the airbag cover 62 and the base plate 61 are fixed to each other with one touch (snap-in).

  Further, the inflator 65 is combined from the back side of the base plate 61 while inserting the mounting hole into the mounting bolt 101 protruding to the back side of the base plate 61, and the nut 102 is screwed onto the mounting bolt 101 and tightened. In this state, a part on the front side of the inflator main body portion 65a provided with the gas injection port of the inflator 65 is inserted into the inside of the airbag from the inflator mounting hole, and the module main body 12 is configured.

  On the other hand, the cover body 24 is combined with the steering wheel body 11 from the back side, and the cover body 24 is attached to the steering wheel body 11 while being positioned.

  Then, the boss 31 of the steering wheel body 11 is fitted to the steering shaft, and is fastened and fixed with a nut (not shown).

  The module main body 12 can be attached to the steering wheel main body 11 from the front side only by one touch. That is, when the module main body 12 is pushed into the steering wheel main body 11 from the front side, the engagement claw portions 41, 41, 42 provided on the core metal 21 are engaged with one engagement receiving portion 81 of each wire 76 of the fixing portion 70. The module main body 12 is engaged with the steering wheel main body 11 at three places on both sides and the lower side, and is supported to prevent the module main body 12 from coming off.

  More specifically, when the module main body 12 is pushed in, the engaging claws 41, 41, 42 enter the opening 85, and one engagement receiving portion 81 of the wire 76 is connected to the other engagement receiving portion 81 side, that is, The module main body 12 is pressed in a direction intersecting (orthogonal) with the direction in which the module main body 12 is pushed in and moved against the urging force of the elastic connecting portion 82. When the module body 12 is fully pushed in and the engaging claws 41, 41, 42 pass through the wire 76, the wire 76 is restored and deformed by the urging force of the elastic connecting portion 82, and one of the engagement receiving portions 81 is Moving in a direction away from the engagement receiving portion 81, the engagement claw portions 41, 41, 42 are engaged. In this state, one of the engagement receiving portions 81 is urged in the direction in which the engagement amount is increased by the urging force of the elastic connecting portion 82, and each engagement receiving portion 81 has an engagement claw. The portions 41, 41, 42 are surely prevented from coming off in the front direction, and are prevented from coming off unexpectedly.

  Further, in this state, each guide protrusion 89 of the module main body 12 is inserted into each positioning hole 35 of the steering wheel main body 11 so as to be able to advance and retreat, and guides along the front-rear direction.

  Further, each coil spring 78 of the module main body 12 is supported in contact with each spring receiving portion 37 of the steering wheel main body 11, and each movable contact 88 of the module main body 12 is supported by the biasing force of the coil spring 78. It is supported in a state of being separated from each of the fixed contacts 36.

  Further, the steering wheel 10 including the module main body 12 is configured to be attached to the steering shaft by, for example, performing electrical wiring on the contact portion 65c of the inflator 65 and the like.

  The steering wheel 10 configured as described above is operated when the occupant in the driver's seat holds the rim portion 15 and rotates. Further, when one of the movable contacts 88 comes into contact with the fixed contact 36 by pushing the airbag cover 62 of the module body 12 that also serves as a pushing portion against the urging force of the coil spring 78, the vehicle body side The horn device is blown.

  On the other hand, in the event of a frontal collision of the vehicle, gas is rapidly injected from the inflator 65 into the airbag, and the airbag stored in a folded state is rapidly inflated. Then, due to the inflation pressure of the airbag, the airbag cover 62 is cleaved along the tear line to form an airbag outlet, and the airbag protrudes from the outlet and inflates and deploys in front of the occupant. It is designed to protect and constrain.

  Further, when the module body 12 is removed from the steering wheel body 11, when the disengagement tool T is inserted from the tool access holes 54 (the guide hole 53 and the hole 51) located on both sides, the tool access hole 54 ( With the guide hole 53 and the hole 51), the disengagement tool T is guided linearly to one operation part 83 of the wires 76 on both sides. Therefore, when the inserted disengagement tool T is pushed into contact with one operation portion 83, one operation portion 83 (one engagement receiving portion 81) is moved to the other operation portion 83 (the other engagement portion 83). When the wire 76 is elastically deformed so as to approach the receiving portion 81) (FIG. 2) and one of the engagement receiving portions 81 does not face the back side of the side engaging claw portion 41, the module body 12 The engagement at each side portion engaging claw portion 41 is released, and the upper side portion of the module main body 12 can be moved in the front direction with respect to the steering wheel main body 11. As a result, since the lower wire 76 is only engaged with the lower engaging claw portion 42, the module main body 12 is slid toward the clock 12 o'clock position of the rim portion 15, thereby 12 can be removed from the steering wheel body 11.

  That is, by providing a guard portion 91 that prevents the engagement release tool T and the module portion M from contacting each other between the operation portion 83 of the wire 76 and the module portion M of the module body 12, the engagement release tool T When one of the operating portions 83 is pushed to release the engagement of the side engaging claws 41 by the wires 76, the disengagement tool T pushed in to push the operating portion 83 is operated by this operating portion. Even if it slips off from 83, the guard part 91 reliably prevents the disengagement tool T from coming into contact with the module part M by receiving the tip of the disengagement tool T. it can.

  In particular, the module part M includes delicate operation parts such as an inflator 65, a connector, and a wire harness, and a horn switch that may impair the expected operation due to misalignment. Therefore, these parts are engaged by the guard part 91. The release tool T can be reliably protected, and the module part M can be reliably operated.

  Further, the engagement release tool T is guided to the operation portion 83 by the tool access hole 54, in other words, the operation portion 83 and each guard portion 91 are arranged on the movement locus of the engagement release tool T according to the tool access hole 54. As a result, the disengagement tool T is guided in the direction of the guard portion 91, and it is more difficult to advance to the module portion M more securely. It is possible to more reliably prevent the disengagement tool T from being brought into contact with the module part M by mistake when releasing the engagement of the part engagement claw part 41.

  Furthermore, by providing each guard part 91 continuously with each side fixing part 73, it is possible to prevent a gap from being formed between the guard part 91 and the side fixing part 73, and from this clearance, the disengagement tool It can prevent more reliably that T moves to the module part M side and contacts the module part M.

  In the first embodiment, there is an advantage that the guard unit 91 is provided on the module body 12 side in that the guard unit 91 can maintain a certain positional relationship with respect to the module unit M. As in the second embodiment shown in FIG. 6, even if the guard 91 is protruded from the steering wheel body 11 (the boss core 26), the same effect can be obtained.

  Further, as in the third embodiment shown in FIG. 7, the guard portion 91 not only receives the disengagement tool T so as not to move further to the module portion M side, for example, but is arranged in an inclined shape, for example. Thus, the disengagement tool T may be guided so as to escape (deflection) in a direction different from that of the module part M. For example, the disengagement tool T may be formed in a pocket shape to receive and position the engagement disengagement tool T. It may be configured.

  In each of the above embodiments, the wire 76 is provided on the case 64 (base plate 61) and the engaging claw 34 is provided on the steering wheel main body 11 (boss metal core 26). (Boss core metal 26), engaging claw 34 may be provided on case 64 (base plate 61), and wire 76 is provided on case 64 (base plate 61) and steering wheel body 11 (boss metal core 26). The engaging claw 34 may be provided on the steering wheel main body 11 (boss core metal 26) and the case 64 (base plate 61). That is, one of the wire 76 and the engaging claw 34 is provided on at least one of the case 64 (base plate 61) and the steering wheel body 11 (boss core metal 26), and the other is provided on the case 64 (base plate 61) and the steering. It can be provided on the other side of the wheel body 11 (the boss core 26).

  In addition, the operation unit 83 is provided integrally with the engagement receiving unit 81 of the wire 76. However, the operation unit 83 may not be integrated with the wire 76 as long as the wire 76 can be deformed against urging by pressing. Good.

  Further, although the wire 76 is used as the engagement member, the engagement portion (engagement claw portion 34) is engaged with the engagement portion (engagement claw portion 34) and pushed by the contact portion by the engagement release tool T. The wire 76 is not limited as long as the engagement can be released.

  In each of the above-described embodiments, the airbag device 13 is suitably used not only for the steering wheel 10 but also for an airbag device for a passenger seat disposed in, for example, an instrument panel. It is possible.

  The present invention can be applied to, for example, a steering wheel of an automobile provided with an airbag device.

11 Steering wheel body as support
12 Module main body
13 Airbag device
34 Engaging claw as an engaging part
54 Tool access hole as guide
64 cases
76 Wire as engaging member
83 Operation part as contact part
91 Guard part M Module part T Disengagement tool

Claims (2)

A case containing a folded airbag, and a main body provided with a module portion arranged in the case;
A support part to which the main body part is attached;
An engaging portion provided in at least one of the case and the support portion;
An engagement member that is provided on the other of the case and the support portion and engages the engagement portion;
A contact portion that is disposed at a position where the case and the support portion face each other and is pushed to release the engagement of the engagement portion by the engagement member; and
A guard portion that is positioned between the abutting portion and the module portion and is pushed along a direction in which the abutting portion is pushed and a guard portion that prevents contact between the module portion and the module portion; An airbag device characterized by the above. The airbag device according to claim 1, further comprising a guide portion that guides the disengagement tool to the contact portion.

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