JP2015189284A - steering wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress vibration of a steering wheel with stable resonance frequency.SOLUTION: A snap pin 31 (support member) of a horn switch mechanism 30 is supported by a core grid 12 in a state that the snap pin is inserted into a bag holder 21 of an air bag device. A pin holder 32 (slider) is disposed on outside of the snap pin 31 in a slidable state, and is energized rearward by a coil spring 36 (energization member). A contact holder 33 (cap member) to which a contact point terminal 34 (movable side contact part) is attached, covers respective rear end parts of the snap pin 31 and the pin holder 32 from a rear part of the pin holder 32, in a state of separating rearward from the rear end part of the pin holder 32. An annular damper holder 42 having an annular projection part 42c (engaged part) is attached to the contact holder 33. An elastic member 41 has an annular shape, and attached to outside of the pin holder 32 in a state that a movement of the elastic member in a direction along an axial line L2 is regulated, and engaged with the annular projection part 42c on an annular recess part 41d (engaging part).

Description

  The present invention relates to a steering wheel that is rotated when a traveling direction is changed in a vehicle such as a vehicle.

  One form of a steering wheel is provided with an airbag device for protecting a driver from an impact when a vehicle or other vehicle is impacted from the front (see, for example, Patent Document 1). As shown in FIG. 13, this steering wheel includes a horn switch mechanism for operating the horn device 60 in addition to the airbag device 50. The horn switch mechanism includes an elastic member 51, a support member 52, a slider 53, a spring 54, a cap member 55, and a movable contact point portion 56. The elastic member 51 has an annular shape and is attached to the bag holder 57 of the airbag device 50. The support member 52 is supported by the core metal 59 of the steering wheel while being inserted through the elastic member 51. The rear end portion of the support member 52 constitutes a fixed side contact portion 52a. The slider 53 is disposed between the elastic member 51 and the support member 52 so as to be slidable with respect to the support member 52, and is urged rearward by a spring 54. The cap member 55 covers the rear end portions of the support member 52 and the slider 53 from the rear in a state where the cap member 55 is in contact with the rear end portion of the slider 53. The movable contact point portion 56 is attached to the cap member 55 and is electrically connected to the horn device 60 via a bag holder 57 and the like.

  In the steering wheel having the horn switch mechanism having the above-described configuration, when the airbag device 50 is not pushed down, the movable contact point portion 56 moves rearward from the fixed contact point portion 52a. Both contact portions 52a and 56 are in a state where conduction is cut off, and the horn device 60 does not operate. At this time, the airbag device 50 functions as a damper mass of the dynamic damper, and the elastic member 51 functions as a spring of the dynamic damper. Therefore, when the steering wheel vibrates, the elastic member 51 vibrates with the airbag device 50 while elastically deforming at a resonance frequency equal to or close to the vibration frequency, and absorbs vibration energy of the steering wheel. This absorption suppresses (suppresses) the vibration of the steering wheel.

  On the other hand, when the airbag device 50 is pushed down, a force applied to the airbag device 50 is transmitted to the movable contact point portion 56 and the slider 53 via the cap member 55. The slider 53 is pressed by the cap member 55, and the slider 53 is slid forward against the spring 54. Further, when the movable contact point 56 moves forward together with the cap member 55 and comes into contact with the fixed contact point 52a of the support member 52, the horn device 60 is activated.

JP2013-71626A

  However, the structure of the steering wheel is a structure that always rubs against the cap member 55 in a state where the rear end portion of the slider 53 receives the weight of the airbag device 50. Therefore, when the vibration of the steering wheel is to be suppressed (vibrated) by the airbag device 50 (damper mass) and the elastic member 51 (spring), the resonance frequency is not stabilized due to the friction. Further, the resonance frequency tends to fluctuate depending on the magnitude of vibration input from the vehicle (vehicle) side. For example, when the input vibration is small, the sliding resistance of the slider 53 with respect to the cap member 55 becomes dominant with respect to the resonance frequency, and the resonance frequency tends to be relatively high.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a steering wheel capable of suppressing vibration at a stable resonance frequency.

  A steering wheel that solves the above-described problem is disposed so as to be slidable on the outside of the support member, supported by the cored bar while being inserted through the bag holder of the airbag device, and moved backward by the biasing member. An energized slider, and a cap member that covers at least each rear end portion of the support member and the slider from the rear in a state of being separated rearward from the rear end portion of the slider and has a movable contact portion attached thereto. An annular damper holder attached to the cap member and having a locked portion, and mounted on the outer periphery of the slider, mounted on the outer side of the slider in a state in which movement in the direction along its own axis is restricted. An annular elastic member locked to the locked portion at the locking portion, and when the airbag device is not pushed down, the airbag device is connected to the dynamic damper. The elastic member functions as a damper mass, and the elastic member functions as a spring of the dynamic damper. When the airbag device is pushed down, the cap member is moved forward while deforming the elastic member to move the elastic member to the rear end of the slider. Further, the horn device is operated by bringing the movable contact portion into contact with the support member by causing the slider to slide forward against the biasing member.

  According to the above configuration, when the airbag device is not pushed down, the load of the airbag device is the same as that of the cap member, the damper holder attached to the cap member, and the elastic member locked to the damper holder. It is transmitted to the slider on which the member is mounted.

  Therefore, when the steering wheel vibrates, the airbag device functions as a damper mass of the dynamic damper, and the elastic member functions as a spring of the dynamic damper. The elastic member vibrates with the airbag device and absorbs vibration energy of the steering wheel while elastically deforming at a resonance frequency equal to or close to the vibration frequency of the steering wheel. This absorption suppresses (suppresses) the vibration of the steering wheel.

  At this time, since the rear end portion of the slider is separated from the cap member, it does not rub against the cap member. No sliding resistance is generated between the rear end of the slider and the cap member. For this reason, the influence of the sliding resistance on the resonance frequency is eliminated, and the resonance frequency is stabilized. Moreover, even if the vibration input from the vehicle side changes, the resonance frequency of the target dynamic damper becomes difficult to change.

  On the other hand, when the airbag device is pushed down, the force applied to the airbag device is transmitted to the cap member, the damper holder, and the elastic member, and the elastic member is elastically deformed. With this elastic deformation, the cap member approaches the rear end of the slider with the movable contact point. When the airbag device is pushed down even after the cap member contacts the rear end of the slider, the slider is directly pressed by the cap member, and the slider is slid forward against the biasing member. When the movable contact portion moves forward together with the cap member and comes into contact with the rear end portion of the support member, the horn device is activated.

  In the steering wheel, the locked portion is configured by a protrusion protruding from an inner peripheral surface of the damper holder, and the locking portion is provided on an outer peripheral portion of the elastic member and is engaged with the protrusion. It is preferable that it is comprised by the recessed part made.

  According to said structure, the recessed part provided in the outer peripheral part of the cyclic | annular elastic member is engaged with the protrusion which protrudes from the internal peripheral surface of a damper holder, and an elastic member is appropriately latched by a damper holder. .

  In the steering wheel, an annular groove that engages with an inner periphery of the elastic member is formed on an outer peripheral portion of the slider, and movement of the elastic member along the axis is restricted by the annular groove. It is preferred that

According to said structure, the inner wall surface of the both sides of the annular groove about the direction along the axis line of an elastic member contact | abuts to an elastic member, and the movement of the direction along the axis line of the elastic member is controlled.
In the steering wheel, it is preferable that a gap is formed between the slider and a rear portion of the elastic member that is located on the rear side of the engagement portion with the annular groove.

  According to the above configuration, since the gap is formed between the rear portion of the elastic member and the slider, the elastic member can be elastically deformed even in this gap. The elastic member is more easily elastically deformed than that without a gap, and can be vibrated with the airbag device while elastically deforming the elastic member at a target resonance frequency.

  In addition, if the gap is formed at a location adjacent to the locking portion of the elastic member, when the elastic member is elastically deformed in the gap, the locking state of the locking portion with respect to the locked portion is changed to the elasticity. Under the influence of the deformation, there is a possibility that the locking part is detached from the locked part. However, the gap formed between the rear portion of the elastic member and the slider is separated from the locking portion. Therefore, the gap portion hardly affects the locking state of the locking portion with respect to the locked portion, and the locking portion is unlikely to come off the locked portion due to the gap portion.

  In the steering wheel, the support member includes an elongated main body portion and a flange portion formed at a rear end portion of the main body portion with a larger diameter than the main body portion, and the slider includes the main body portion. A cylindrical portion through which the portion is inserted, and an enlarged diameter portion that is formed at a rear end portion of the cylindrical portion and surrounds the flange portion, and the gap portion includes the rear portion of the elastic member and the slider. It is preferable to include at least one of an inner gap portion formed between the cylindrical portion and a rear gap portion formed between the rear portion of the elastic member and the enlarged diameter portion of the slider.

  According to the above configuration, when the gap portion includes the inner gap portion between the rear portion of the elastic member and the cylindrical portion of the slider, that is, radially inward of the rear portion of the elastic member, the elastic member is It is possible to elastically deform even in the inner space. A space in which the elastic member can be elastically deformed expands inward in the radial direction of the elastic member, and the elastic member is more easily elastically deformed inward in the radial direction than that in which the inner space is not formed.

  Further, when the gap portion includes a rear gap portion between the rear portion of the elastic member and the enlarged diameter portion of the slider, i.e., behind the rear portion of the elastic member, a space in which the elastic member can be elastically deformed, The elastic member expands rearward of the elastic member, and the elastic member is easily elastically deformed rearward as compared with the case where the rear gap is not formed.

In the steering wheel, the elastic member is preferably formed in a shape in which a rigidity in a direction along the axis is higher than a rigidity in a direction perpendicular to the coaxial line.
According to said structure, an elastic member becomes easier to deform | transform than with respect to the direction along an axis with respect to the direction orthogonal to an axis. Therefore, when the steering wheel vibrates in a direction perpendicular to the axis of the elastic member, for example, in the vertical direction or the left-right direction, the elastic member is elastically deformed in the same direction at the resonance frequency that is the same as or close to the vibration frequency. By vibrating with the bag device, the vibration of the steering wheel is satisfactorily suppressed.

  The steering wheel employs a structure that deforms the elastic member when the airbag device is pushed down in order to operate the horn device. Therefore, the ease of elastic deformation of the elastic member has a considerable influence on the operation load when the airbag device is pushed down. In this respect, the elastic member is less likely to be deformed in the direction along the axis than in the direction perpendicular to the axis. Therefore, the degree of influence of the elastic member on the operation load when the airbag device is pushed down is smaller than when the elastic member is more easily deformed in the direction along the axis than in the direction perpendicular to the axis.

  According to the steering wheel, vibration can be suppressed at a stable resonance frequency.

It is a figure which shows one Embodiment embodied in the steering wheel for vehicles, (a) is a side view of a steering wheel, (b) is a front view which shows the position of the airbag apparatus in a steering wheel. The partial front view of the metal core in the steering wheel of one Embodiment. The perspective view which shows the airbag apparatus in the steering wheel of one Embodiment in the state seen from diagonally forward. The perspective view which shows the horn switch mechanism in the steering wheel of one Embodiment in the state seen from diagonally forward. The fragmentary sectional view of the steering wheel of one embodiment. The disassembled perspective view of the airbag apparatus in the steering wheel of one Embodiment. The disassembled perspective view which shows the component of the horn switch mechanism in the steering wheel of one Embodiment with a bag holder. In the steering wheel of one Embodiment, the fragmentary sectional view which shows the cross-section of the horn switch mechanism attached to the bag holder. Similarly, the fragmentary sectional view which shows the cross-sectional structure in a cross section different from FIG. 8 about the horn switch mechanism attached to the bag holder. The fragmentary sectional view which expands and shows the Y section in FIG. (A)-(c) is a fragmentary sectional view in which all show the modification of an elastic member and a damper holder. The fragmentary sectional view which shows the modification of a horn switch mechanism. The fragmentary sectional view which shows the horn switch mechanism in the conventional steering wheel, and its peripheral part.

Hereinafter, an embodiment embodied in a steering wheel for a vehicle will be described with reference to FIGS.
As shown in FIG. 1 (a), a vehicle has a steering shaft (steering shaft) 14 that extends substantially in the longitudinal direction of the vehicle along the axis L1 and rotates about the coaxial line L1. It is arranged in an inclined state. A steering wheel 10 is attached to the rear end portion of the steering shaft 14.

  In this embodiment, when describing each part of the steering wheel 10, the axis L1 of the steering shaft 14 is used as a reference. The direction along the axis L1 is referred to as the “front-rear direction” of the steering wheel 10, and the direction in which the steering wheel 10 stands up among the directions along the plane perpendicular to the axis L1 is referred to as the “vertical direction”. Therefore, the front-rear direction and the vertical direction of the steering wheel 10 are slightly inclined with respect to the front-rear direction (horizontal direction) and the vertical direction (vertical direction) of the vehicle.

  3 to 10, for the sake of convenience, the front-rear direction of the steering wheel 10 matches the horizontal direction, and the vertical direction of the steering wheel 10 matches the vertical direction. The same applies to FIGS. 11 to 13.

  As shown in FIG. 1B, the steering wheel 10 includes an airbag device (airbag module) 20 at the center. As shown in FIGS. 2 and 5, the skeleton portion of the steering wheel 10 is constituted by a cored bar 12. The cored bar 12 is made of iron, aluminum, magnesium, or an alloy thereof. The cored bar 12 is attached to the steering shaft 14 at a boss portion 12 a located at the central portion thereof, and rotates integrally with the steering shaft 14.

  In the core metal 12, holding portions 12b each having a through hole 12c are provided at a plurality of locations around the boss portion 12a. As shown in FIG. 8, the inner wall surface of each through-hole 12c has a tapered shape with a diameter increasing toward the rear side. In FIG. 2, the illustration of the tapered inner wall surface is omitted.

  As shown in FIGS. 2 and 8, the clip 13 is incorporated in a state of being slightly elastically deformed on the front side of each holding portion 12 b. The clip 13 is formed by bending a wire made of a metal such as a spring rope having conductivity into a predetermined shape, and a part of the clip 13 is in contact with the core metal 12. A part of each clip 13 is located near the front of the through hole 12c.

  The vehicle is provided with a horn device 40, and a plurality of horn switch mechanisms 30 (see FIGS. 3 and 6) for operating the horn device 40 are arranged in a snap fit structure in each holding portion 12 b. 12 is attached. Each horn switch mechanism 30 has the same configuration. The airbag device 20 is supported by the cored bar 12 via these horn switch mechanisms 30. As described above, each horn switch mechanism 30 has both a function of supporting the airbag device 20 and a switch function of the horn device 40.

  Furthermore, in this embodiment, the elastic member 41 and the damper holder 42 are interposed between the bag holder 21 and each horn switch mechanism 30 in the airbag device 20. The core metal 12, the airbag device 20, the horn switch mechanism 30, the elastic member 41, the damper holder 42, and the like constitute a vibration suppression structure for suppressing, that is, suppressing vibration of the steering wheel 10. Next, each part which comprises the said damping structure is demonstrated.

<Airbag device 20>
As shown in FIGS. 3, 5, and 6, the airbag device 20 is configured by assembling a pad portion 24, a ring retainer 25, an airbag (not shown) and an inflator 23 to the bag holder 21. .

  The pad portion 24 has an outer skin portion 24a whose surface forms a design surface, and a substantially square annular housing wall portion 24b erected on the back surface side (front side) of the outer skin portion 24a. A space surrounded by the outer skin portion 24a, the accommodating wall portion 24b, and the bag holder 21 mainly constitutes a bag accommodating space x for accommodating an airbag (not shown). A thin-walled portion 24c that is pushed and broken when the airbag is deployed and inflated is formed in a portion that forms the bag housing space x of the outer skin portion 24a.

  A plurality of locking claws 24d each having a rectangular plate shape are integrally formed at the front end portion of the accommodating wall portion 24b. A locking projection 24e is formed on the front end of each locking claw 24d. The locking projection 24e protrudes outward (side away from the bag storage space x).

  Switch support portions 24f for supporting the horn switch mechanism 30 are formed at a plurality of locations of the pad portion 24, respectively. Each switch support portion 24f is formed integrally with the housing wall portion 24b so as to extend from the outer skin portion 24a of the pad portion 24 to the back surface side (front side).

  As shown in FIGS. 3, 6, and 7, the bag holder 21 is formed by performing press working, die casting, or the like using a conductive metal plate. The peripheral part of the bag holder 21 is configured as a substantially square annular peripheral fixing part 21 a for fixing the pad part 24.

  In the periphery fixing portion 21a, slit-like claw locking holes 21b are formed at positions in front of the respective locking claws 24d, and the front end portions of the respective locking claws 24d are inserted therein to be locked. Has been.

  An inner portion of the peripheral edge fixing portion 21a constitutes a pedestal portion 21c. A circular opening 21d is formed at the center of the pedestal 21c. Screw insertion holes 21e are formed at a plurality of locations in the vicinity of the peripheral edge of the opening 21d in the pedestal 21c. A part of the inflator 23 is attached to the pedestal 21c while being inserted through the opening 21d.

  More specifically, the inflator 23 has a low columnar main body 23a, and a flange portion 23b is formed on the outer peripheral surface of the main body 23a. A plurality of attachment pieces 23c are extended to the flange portion 23b outward in the radial direction of the main body 23a. In each attachment piece 23c, a screw insertion hole 23d is formed at a location in front of the screw insertion hole 21e of the bag holder 21. In the inflator 23, a portion on the rear side of the flange portion 23b is configured as a gas ejection portion 23e that ejects an expansion gas. And it is penetrated by the opening part 21d of the bag holder 21 from the front side so that the gas ejection part 23e of the inflator 23 may protrude to the bag accommodating space x side. Further, the flange 23b is brought into contact with the peripheral edge of the opening 21d. In this state, the inflator 23 is attached to the bag holder 21 together with the ring retainer 25.

  More specifically, the ring retainer 25 has a circular opening 25a equivalent to the opening 21d of the bag holder 21. Further, the ring retainer 25 has mounting screws 25b at a plurality of positions behind the screw insertion holes 21e of the bag holder 21. Between the ring retainer 25 and the bag holder 21, an opening portion of an airbag (not shown) that is folded so as to be deployed and inflated is disposed. The plurality of mounting screws 25b of the ring retainer 25 are connected to the screw insertion holes (not shown) provided in the peripheral portion of the opening of the airbag and the screw insertion holes 21e and 23d of the bag holder 21 and the inflator 23. It is inserted from the rear side. Further, the nut 26 is tightened from the front side to each of the mounting screws 25b after the insertion, whereby the airbag is fixed to the bag holder 21 via the ring retainer 25 and the inflator 23 is fixed to the bag holder 21.

  Attachment portions 21f for attaching the horn switch mechanism 30 are formed at a plurality of locations on the peripheral edge fixing portion 21a of the bag holder 21 so as to protrude outward in the radial direction of the circular opening 21d. Each attachment portion 21f is located at a location in front of the switch support portion 24f of the pad portion 24 described above. An attachment hole 21g is formed in each attachment portion 21f. A plurality of sandwiching portions 21 i extending rearward are integrally formed on the periphery of each attachment hole 21 g in the bag holder 21. In this embodiment, each clamping part 21i is formed by bending the location which opposes on both sides of each attachment hole 21g in the bag holder 21 back. As a result of the bending of each clamping part 21i, a hole 21j (see FIG. 8) is formed in the bag holder 21 on the outside of each clamping part 21i, that is, on the opposite side of the clamping part 21i from the mounting hole 21g. Yes.

<Horn switch mechanism 30>
As shown in FIGS. 4, 7 and 8, each horn switch mechanism 30 includes a snap pin 31 as a support member, a pin holder 32 as a slider, a contact holder 33 as a cap member, and a contact terminal as a movable contact portion. 34, a spring receiver 35, and a coil spring 36 as an urging member. Next, each component of the horn switch mechanism 30 will be described.

<Snap pin 31 (support member)>
The snap pin 31 is made of a conductive metal material. The support structure for the core metal 12 of the snap pin 31 will be described later. The main part of the snap pin 31 is constituted by a long body part 31f extending in the front-rear direction and having a slightly smaller diameter than the attachment hole 21g of the bag holder 21. An annular locking groove 31b is formed on the outer peripheral surface of the front end portion of the main body 31f. The snap pin 31 includes a disc-shaped flange 31a at the rear end of the main body 31f. The collar portion 31a is formed in a larger diameter than the main body portion 31f, and functions as a fixed-side contact portion. In addition, the collar part 31a may be formed in non-disk shape.

<Pin holder 32 (slider)>
As shown in FIGS. 8 to 10, the pin holder 32 is formed in a cylindrical shape with both front and rear ends opened by an insulating resin material. The pin holder 32 is disposed outside the snap pin 31, and is used as a slider that slides in the longitudinal direction (front-rear direction) of the main body 31f with respect to the snap pin 31 when the horn switch mechanism 30 is operated. In the pin holder 32, a cylindrical enlarged portion 32b having a rear end opened is formed at the rear end of the portion (hereinafter referred to as “tubular portion 32a”) where the main body portion 31f of the snap pin 31 is inserted. . The enlarged diameter portion 32b has an inner diameter slightly larger than the outer diameter of the flange portion 31a of the snap pin 31, and surrounds the flange portion 31a. In addition, when the flange part 31a of the snap pin 31 is formed in a non-disk shape, the cylindrical shape is provided on the condition that the shape of the enlarged diameter part 32b is a shape that can surround the flange part 31a. It may be changed to a different cylindrical shape.

  An annular protrusion 32c is formed on the entire outer periphery of the front portion of the cylindrical portion 32a. The annular protrusion 32 c has a function of receiving the rear end portion of the coil spring 36. A tapered portion 32d that increases in diameter toward the rear side is formed at a location on the outer periphery of the cylindrical portion 32a and slightly away from the annular protrusion 32c to the rear. And the location which is the outer side of the cylindrical part 32a, and was pinched | interposed by the annular protrusion 32c and the taper part 32d comprises the annular groove 32e with which the inner peripheral part of the elastic member 41 is engaged.

<Contact holder 33 (cap member)>
As shown in FIGS. 7 to 9, the contact holder 33 is formed of an insulating resin material. The contact holder 33 includes a top plate portion 33a having a substantially disc shape, and a substantially cylindrical peripheral wall portion 33b extending forward from the outer peripheral edge of the top plate portion 33a. The contact holder 33 is separated from the enlarged diameter portion 32b constituting the rear end portion of the pin holder 32 rearward, and at least the rear end portion (the flange portion 31a) of the snap pin 31 and at least the rear end portion (expanded portion) of the pin holder 32. The diameter part 32b) is covered from the rear. A hook portion 33c is formed at a location facing the radial direction of the peripheral wall portion 33b so as to be elastically deformable in the radial direction.

  Claw engagement holes 33d are formed at a plurality of locations that are intermediate portions in the front-rear direction of the peripheral wall portion 33b and are separated from each other in the circumferential direction. In addition, arc-shaped notches 33e are formed at a plurality of locations at the front end portion of the peripheral wall portion 33b and separated from each other in the circumferential direction (see FIG. 4).

<Contact terminal 34 (movable side contact portion)>
The contact terminal 34 is formed by pressing a strip-shaped metal plate having conductivity. The contact terminal 34 includes a main body portion 34a extending in the radial direction of the contact holder 33 and a pair of side portions 34b extending forward from both ends of the main body portion 34a.

  A plurality of contact protrusions 34c protruding forward are formed at a plurality of locations in the length direction of the main body 34a. In the main body portion 34 a, most of the portion excluding the contact protrusion 34 c is in contact with the front surface of the top plate portion 33 a of the contact holder 33.

  Each side part 34b is in contact with the inner wall surface of the peripheral wall part 33b of the contact holder 33 in an engaged state. Due to this engagement, the contact terminal 34 is mounted in a state of being positioned on the contact holder 33.

  In addition, the enlarged diameter part 32b of the pin holder 32 is interposed between each side part 34b and the collar part 31a of the snap pin 31, and the insulation state of each side part 34b and the collar part 31a is ensured. . Further, a cylindrical portion 32a of the pin holder 32, an elastic member 41, and a damper holder 42 are interposed between the side portions 34b and the main body portion 31f of the snap pin 31, and the side portions 34b and the main body portion 31f are connected to each other. Insulation is ensured.

<Spring support 35>
As shown in FIGS. 4 and 8, the spring receiver 35 is formed of a resin material having an insulating property. A part of the spring receiver 35 is constituted by an annular portion 35b having an annular shape. The outer diameter of the annular portion 35b is set to be approximately the same as the outer diameter of the coil spring 36 and the outer diameter of the rear end portion of the inner wall surface of the through hole 12c, that is, the maximum diameter of the tapered inner wall surface.

  A locking piece 35c extends forward from a plurality of locations in the circumferential direction on the front surface of the annular portion 35b. A claw portion 35d protrudes radially inward from the front end portion of each locking piece 35c. Further, on the front surface of the annular portion 35b, a plurality of engagement pieces 35e extend forward from between the locking pieces 35c adjacent in the circumferential direction. The outer surface of each engagement piece 35e constitutes a part of a tapered surface whose diameter increases toward the rear side.

  A pair of mounting portions 35f extends rearward from the annular portion 35b. Each mounting portion 35f is curved so as to bulge outward in the radial direction of the annular portion 35b, corresponding to the outer shape of the main body portion 31f of the snap pin 31.

  The spring receiver 35 is fitted to the outside of the main body portion 31f of the snap pin 31 at the annular portion 35b and the both mounting portions 35f, and the claw portions 35d enter the locking grooves 31b, so that the spring pin 35 cannot be detached from the snap pin 31. It is attached to. As described above, in the spring receiver 35, the outer surfaces of the plurality of engagement pieces 35e are intermittently arranged in the circumferential direction with the plurality of locking pieces 35c interposed therebetween. With this configuration, the spring receiver 35 as a whole has the same form as having a tapered outer surface whose diameter increases toward the rear side.

<Coil spring 36 (biasing member)>
The coil spring 36 is wound around the main body 31 f of the snap pin 31. The coil spring 36 is disposed in a compressed state between the annular protrusion 32 c of the pin holder 32 and the annular portion 35 b of the spring receiver 35.

  In this way, a plurality of single components, that is, the snap pin 31, the pin holder 32, the contact holder 33, the contact terminal 34, the coil spring 36, and the spring receiver 35 are unitized to form the horn switch mechanism 30 that is an assembly. Has been. Therefore, when the horn switch mechanism 30 is attached or replaced, the unitized horn switch mechanism 30 can be handled as one aggregate.

<Elastic member 41>
As shown in FIGS. 7, 8, and 10, the elastic member 41 is formed in a cylindrical shape in which both front and rear ends are opened by an elastic material such as rubber (for example, EPDM, silicon rubber, etc.) and elastomer. . The front inner peripheral surface of the elastic member 41 is configured by a general surface 41 a having a constant inner diameter in the direction along the axis L <b> 2 of the elastic member 41. The inner peripheral surface on the rear side of the general surface 41a of the elastic member 41 is configured by a tapered surface 41b whose diameter increases toward the rear side. When the elastic member 41 is mounted on the pin holder 32, the tapered surface 41b is inserted through the elastic member 41 from the rear. At this time, the tapered surface 41b is provided to facilitate the insertion of the pin holder 32. The elastic member 41 is attached to the outer side of the cylindrical portion 32a of the pin holder 32 by being engaged with the annular groove 32e in its inner peripheral portion. In a state where the elastic member 41 is engaged with the annular groove 32e, at least the entire general surface 41a and the front half of the tapered surface 41b are in contact with the wall surface of the annular groove 32e.

  In a state where the elastic member 41 is mounted on the pin holder 32 as described above, a portion (hereinafter referred to as “rear portion 41c”) of the elastic member 41 that is located on the rear side of the engagement portion with the annular groove 32e; A gap is formed between the pin holder 32 and the pin holder 32. This gap is constituted by an inner gap G1 and a rear gap G2. The inner gap G1 is a gap formed between the rear part 41c of the elastic member 41 and the cylindrical part 32a of the pin holder 32, and the rear gap G2 includes the rear part 41c and the enlarged diameter part 32b of the pin holder 32. It is a space | gap part formed between these.

On the outer periphery of the elastic member 41, an annular recess 41d is formed as a locking portion over the entire periphery.
The elastic member 41 constitutes a dynamic damper together with the airbag device 20 described above. In this embodiment, the elastic member 41 is made to function as a spring of a dynamic damper, and the airbag apparatus 20 is made to function as a damper mass.

  Here, by tuning the size of the elastic member 41, the thickness in the radial direction, the length in the front-rear direction, etc., the resonance frequency of the dynamic damper in the up-down direction and the left-right direction can be increased. Is set to a target vibration suppression frequency, in other words, a frequency to be controlled.

<Damper holder 42>
The damper holder 42 is formed in a substantially low cylindrical shape by an insulating resin material. The damper holder 42 is disposed between the elastic member 41 and the clamping portion 21 i in the bag holder 21 and is disposed on the rear side of the attachment portion 21 f in the bag holder 21.

  As shown in FIGS. 4 and 9, engagement claws 42 a are formed at a plurality of locations on the outer periphery of the damper holder 42 that are separated from each other in the circumferential direction. The damper claw 42 a is attached to the contact holder 33 by engaging the engaging claw 42 a with the corresponding claw engaging hole 33 d of the contact holder 33 from the inside.

  Stoppers 42b are formed at a plurality of locations on the outer peripheral portion of the front end of the damper holder 42 that are separated from each other in the circumferential direction. These stoppers 42b are engaged with the corresponding notches 33e of the contact holder 33, whereby the damper holder 42 is positioned in the front-rear direction with respect to the contact holder 33.

  As shown in FIG. 10, on the inner peripheral surface of the damper holder 42, an annular protrusion 42c is projected inward in the radial direction over the entire periphery, and the locked part is formed by the annular protrusion 42c. It is configured. The elastic member 41 is locked to the damper holder 42 by engaging the annular recess 41 d of the elastic member 41 with the annular protrusion 42 c.

  In a state where each horn switch mechanism 30 is attached to the bag holder 21 via the elastic member 41 and the damper holder 42 as described above, the elastic member 41 and the damper holder 42 are connected to the pinching portion 21 i of the bag holder 21 and the pin holder 32. The cylindrical portion 32a is sandwiched from the outside and the inside in the radial direction. Therefore, the movement of the elastic member 41 and the damper holder 42 in the radial direction is restricted by the sandwiching portion 21i and the cylindrical portion 32a.

  The elastic member 41 engaged with the annular groove 32e of the pin holder 32 is sandwiched from the front and rear by the annular protrusion 32c and the tapered portion 32d of the pin holder 32. Therefore, the movement of the elastic member 41 in the direction along the axis L2 is restricted by the annular groove 32e (the annular protrusion 32c and the tapered portion 32d).

  Further, the annular recess 41d provided on the outer peripheral portion of the elastic member 41 is engaged with the annular protrusion 42c protruding from the inner peripheral surface of the damper holder 42, whereby the elastic member 41 is locked to the damper holder 42, and It becomes difficult to come off from the damper holder 42.

  8 and 9, the pin holder 32 supports the bag holder 21 so as to be movable back and forth with respect to the snap pin 31 while preventing contact between the snap pin 31 and the bag holder 21, that is, in an insulating state. To do. Further, the pin holder 32 transmits a backward biasing force of the coil spring 36 to the flange portion 31 a of the snap pin 31.

  In addition, a pair of sandwiching portions 21 i are inserted between the damper holder 42 and the side portion 34 b of the contact terminal 34. Further, the side portion 34b is brought into contact with the outer surface of the clamping portion 21i by the hook portions 33c of the contact holder 33. Due to this contact, the bag holder 21 and the contact terminal 34 are electrically connected.

  Furthermore, the front end portion of the side portion 34b urged by the hook portion 33c is locked to the front side of the clamping portion 21i. The side portion 34b restricts the contact holder 33 and thus the horn switch mechanism 30 from moving backward from the bag holder 21.

Next, an operation of assembling the airbag device 20 to the core metal 12 via the plurality of horn switch mechanisms 30 will be described.
In this operation, the snap pin 31 for each horn switch mechanism 30 is inserted into the through hole 12c of the holding portion 12b corresponding to the core metal 12 from the rear. With this insertion, the annular portion 35b of the spring receiver 35 approaches the holding portion 12b, and the engagement piece 35e approaches the inner wall surface of the through hole 12c. Further, the front end 31 c of the main body 31 f of the snap pin 31 contacts the clip 13. Further, when the snap pin 31 or the like is moved forward against the urging force of the clip 13, the clip 13 is elastically deformed outward in the radial direction of the snap pin 31. When the snap pin 31 is moved to a position where the locking groove 31b faces the clip 13, the clip 13 tries to enter the locking groove 31b by its own elastic restoring force.

  On the other hand, the claw portion 35d of the spring receiver 35 biased forward by the coil spring 36 enters the locking groove 31b. Therefore, the clip 13 enters between the claw portion 35d and the front wall surface 31d in the locking groove 31b while compressing the coil spring 36 rearward in the process of entering the locking groove 31b. By this entry, the claw portion 35d is positioned on the rear side of the clip 13 in the locking groove 31b. In the clip 13, the portion located in front of the through hole 12 c is sandwiched from the front and rear by the claw portion 35 d urged forward by the coil spring 36 and the front wall surface 31 d of the locking groove 31 b, and the movement is restricted. On the other hand, the movement of the snap pin 31 in the front-rear direction is restricted by the clip 13 that has entered the locking groove 31b. In this way, the snap pin 31 is locked to the metal core 12 by the clip 13, so that each horn switch mechanism 30 is fastened to the metal core 12 and the airbag device 20 is attached to the metal core 12. . The structure that is locked to the core metal 12 by the elasticity of the clip 13 as the snap pin 31 is inserted is also called a snap-fit structure.

  In this assembled state, the outer surface of each engagement piece 35e contacts the inner wall surface of the through hole 12c. Further, the claw portion 35d is slightly separated forward from the rear wall surface 31e in the locking groove 31b. In this way, the spring receiver 35 is interposed between the inner wall surface of the through hole 12 c and the snap pin 31.

  In the assembled state, the snap pin 31 of each horn switch mechanism 30 locked to the core metal 12 can advance and retract the bag holder 21 of the airbag device 20 with respect to the core metal 12 via the pin holder 32. That is, it supports so that it can approach or leave | separate with respect to the metal core 12. FIG.

Next, the operation of the steering wheel 10 of the present embodiment configured as described above will be described.
In a normal state where a frontal impact (front collision) or the like is not applied to the vehicle, the airbag device 20 is in a state in which gas is not ejected from the gas ejection portion 23e of the inflator 23 and the airbag is folded. Maintained.

  When the airbag device 20 is not pushed down at the normal time, the contact protrusion 34c of the contact terminal 34 is connected to the flange 31a (fixed side contact portion) of the snap pin 31, as shown in FIGS. ) From the back. The contact terminal 34 and the snap pin 31 are disconnected from each other, and the horn device 40 does not operate. At this time, a backward biasing force of the coil spring 36 is applied via the pin holder 32 to the flange portion 31 a of the snap pin 31 locked to the core metal 12 by the clip 13.

  Further, a forward biasing force of the coil spring 36 is applied to the spring receiver 35 through the annular portion 35b, and the claw portion 35d that has entered the locking groove 31b of the snap pin 31 in the spring receiver 35 is in the locking groove 31b. The clip 13 is pressed forward. By this pressing, the clip 13 is sandwiched from the front and rear by the front wall surface 31d and the claw portion 35d in the locking groove 31b, and the movement is restricted.

Further, the pin holder 32 is interposed between the snap pin 31 and the side portion 34b of the contact terminal 34 to make them insulative.
Here, (a) the damper holder 42 is attached to the contact holder 33, (b) the elastic member 41 is mounted on the outside of the pin holder 32 in a state in which movement in the direction along the axis L2 is restricted, and (c ) The annular recess 41d of the elastic member 41 is engaged with the annular protrusion 42c of the damper holder 42. For these reasons, the load of the airbag device 20 is transmitted to the pin holder 32 through the contact holder 33, the damper holder 42 and the elastic member 41. Here, since the enlarged diameter portion 32 b of the pin holder 32 is spaced forward from the top plate portion 33 a of the contact holder 33, the load of the airbag device 20 is not directly transmitted to the pin holder 32 via the contact holder 33.

  For this reason, if vibrations in the vertical direction and the horizontal direction are transmitted to the steering wheel 10 during the normal time and during idling of the vehicle-mounted engine, the vibration is transmitted to the cored bar 12 and each horn switch. It is transmitted to the airbag device 20 via the mechanism 30.

  When vibration is transmitted to the steering wheel 10 as described above, the airbag device 20 functions as a damper mass of the dynamic damper and the elastic member 41 functions as a spring of the dynamic damper according to the vibration. The elastic member 41 vibrates (resonates) in the vertical and horizontal directions with the airbag device 20 while elastically deforming at a resonance frequency that is the same as or close to the vibration frequency of the steering wheel 10, and vibration energy of the steering wheel 10. To absorb. By this absorption, vibrations in the vertical and horizontal directions of the steering wheel 10 are suppressed (damped).

  At this time, since the enlarged diameter portion 32b of the pin holder 32 is spaced forward from the top plate portion 33a of the contact holder 33, it does not rub against the same top plate portion 33a. No sliding resistance is generated between the enlarged diameter portion 32b and the top plate portion 33a. For this reason, the influence of the sliding resistance on the resonance frequency is eliminated, and the resonance frequency is stabilized. Moreover, even if the vibration input from the vehicle side changes, the resonance frequency of the target dynamic damper is less likely to fluctuate. In particular, even if the input vibration is small, the sliding resistance is not dominant with respect to the resonance frequency, and the resonance frequency is unlikely to increase.

  Further, since the inner gap G1 is formed between the rear portion 41c of the elastic member 41 and the cylindrical portion 32a of the pin holder 32, that is, inward in the radial direction of the rear portion 41c, the elastic member 41 has the inner gap portion G1. However, it can be elastically deformed, and is more easily elastically deformed in the direction perpendicular to the axis L2 than that in which the inner space G1 is not formed. Further, since the rear gap portion G2 is formed between the rear portion 41c of the elastic member 41 and the enlarged diameter portion 32b of the pin holder 32, that is, behind the rear portion 41c, the elastic member 41 is also elastic in the rear gap portion G2. It becomes possible to deform, and it becomes easier to elastically deform in the direction along the axis L2 as compared with the case where the rear gap G2 is not formed.

  In addition, it may be possible to form a gap corresponding to the inner gap G1 or the rear gap G2 at a location adjacent to the annular recess 41d of the elastic member 41. In this case, however, if the elastic member 41 is elastically deformed in the gap. The locking state of the annular recess 41d with respect to the annular protrusion 42c is affected by the elastic deformation, and the annular recess 41d may be detached from the annular protrusion 42c. However, in the present embodiment, both the inner gap G1 and the rear gap G2 formed between the rear portion 41c of the elastic member 41 and the pin holder 32 are separated from the annular recess 41d. Therefore, the gaps (the inner gap G1 and the rear gap G2) are less likely to affect the locking state of the annular recess 41d with respect to the annular protrusion 42c, and are elastic due to the formation of the gap. The annular recess 41 d of the member 41 is unlikely to come off from the annular protrusion 42 c of the damper holder 42.

  On the other hand, when the airbag device 20 is pushed down at the normal time, a force applied to the airbag device 20 is transmitted to the contact holder 33, the damper holder 42 and the elastic member 41 in at least one horn switch mechanism 30, and the elastic member 41. Is elastically deformed. Along with this elastic deformation, the contact holder 33 approaches the enlarged diameter portion 32 b of the pin holder 32 with the contact terminal 34. When the airbag device 20 is pushed down even after the contact holder 33 contacts the enlarged diameter portion 32b, the pin holder 32 is directly pressed by the contact holder 33, and the pin holder 32 resists the coil spring 36, and the snap pin 31 is pressed. It is slid forward along the main body 31f. Further, the contact terminal 34 moves forward together with the contact holder 33.

  When at least one of the plurality of contact protrusions 34 c of the contact terminal 34 comes into contact with the flange 31 a of the snap pin 31, the core metal 12 connected to the ground GND (vehicle body ground) and the bag holder 21 are connected to the clip 13. Conduction is made through the snap pin 31 and the contact terminal 34. By this conduction, the horn switch mechanism 30 is closed, and the horn device 40 electrically connected to the bag holder 21 is activated.

  Further, when the bag holder 21 is moved forward as described above, the backward biasing force of the coil spring 36 that has been applied to the flange portion 31a of the snap pin 31 through the pin holder 32 until then disappears. For this reason, the snap pin 31 is in a state of being able to swing with the portion locked to the cored bar 12 by the clip 13 as a fulcrum. At this time, the backward urging force that has been applied to the clip 13 through the front wall surface 31d in the locking groove 31b is no longer applied, and the clip 13 can move in the locking groove 31b.

  By the way, when an impact is applied to the vehicle from the front due to a front collision or the like, the driver tends to lean forward due to inertia. On the other hand, in the airbag device 20, the inflator 23 is operated in response to the impact, and gas is ejected from the gas ejection part 23e. By supplying this gas to the airbag, the airbag is deployed and inflated. When the pressing force applied to the outer skin portion 24a of the pad portion 24 increases by the airbag, the outer skin portion 24a is broken at the thin portion 24c. The airbag continues to be deployed and inflated backward through the opening created by the break. A deployed and inflated airbag is interposed in front of the driver who leans forward due to the impact of the front collision, restrains the driver's forward tilt and protects the driver from the impact.

According to the embodiment described in detail above, the following effects can be obtained.
(1) An annular protrusion 42c (locked portion) is provided on the inner peripheral portion of the damper holder 42 attached to the contact holder 33 (cap member). The elastic member 41 is mounted on the outside of the cylindrical portion 32a of the pin holder 32 (slider) in a state where movement in the direction along the axis L2 is restricted. An annular recess 41d (locking portion) is provided on the outer peripheral portion of the elastic member 41, and the elastic member 41 is locked to the damper holder 42 by engaging the annular recess 41d with the annular protrusion 42c (FIG. 8, FIG. 9).

  Therefore, even if the top plate portion 33a of the contact holder 33 is separated rearward from the enlarged diameter portion 32b of the pin holder 32, the function of supporting the airbag device 20 on each horn switch mechanism 30 and the switch function of the horn device 40 Can be demonstrated.

  Further, by separating the top plate portion 33a from the enlarged diameter portion 32b as described above, the enlarged diameter portion 32b is not rubbed against the top plate portion 33a when the airbag device 20 cannot be pushed down. Can do. As a result, the influence of the sliding resistance on the resonance frequency can be eliminated and the resonance frequency can be stabilized. Moreover, even if the vibration input from the vehicle side changes, the resonance frequency can be made difficult to fluctuate. The vibration of the steering wheel 10 can be suppressed at a stable resonance frequency.

Further, the elastic member 41 can be appropriately locked to the damper holder 42 with a simple configuration in which the annular recess 41d is engaged with the annular protrusion 42c.
(2) The annular groove 32e with which the inner peripheral part of the elastic member 41 is engaged is formed in the outer peripheral part of the cylindrical part 32a in the pin holder 32 (FIG. 10).

  Therefore, in a state where the inner peripheral portion of the elastic member 41 is engaged with the annular groove 32e, the annular protrusion 32c and the tapered portion 32d are contacted with the inner peripheral portion of the elastic member 41 from the front and rear in the direction along the axis L2. By making contact, the movement of the elastic member 41 in the same direction can be restricted.

(3) A gap portion is formed between the pin holder 32 and a portion (rear portion 41c) located on the rear side of the engagement portion with the annular groove 32e in the elastic member 41 (FIG. 10).
Therefore, the space in which the elastic member 41 can be deformed is enlarged, the elastic member 41 is more easily elastically deformed than that in which no gap is formed, and the elastic member 41 is easily elastically deformed at a target resonance frequency. Can do.

  Unlike the case where the gap is formed at a location adjacent to the annular recess 41 d of the elastic member 41, the annular recess 41 d (locking portion) of the elastic member 41 is the annular protrusion 42 c (locked portion) of the damper holder 42. It is possible to make it difficult for the phenomenon to deviate from the above.

(4) As part of the gap, an inner gap G1 is formed between the rear portion 41c of the elastic member 41 and the cylindrical portion 32a of the pin holder 32 (FIG. 10).
Therefore, the space in which the elastic member 41 can be elastically deformed is expanded inward in the radial direction of the elastic member 41, and the elastic member 41 is elastically inward in the same radial direction as compared with the member in which the inner gap portion G1 is not formed. It can be easily deformed.

(5) A rear gap G2 is formed between the rear part 41c of the elastic member 41 and the enlarged diameter part 32b of the pin holder 32 as a part of the gap (FIG. 10).
Therefore, the space in which the elastic member 41 can be elastically deformed can be expanded rearward of the elastic member 41, and the elastic member 41 can be more easily elastically deformed rearward than that in which the rear gap portion G2 is not formed. .

In addition, the said embodiment can also be implemented as a modification which changed this as follows.
<About contact holder 33>
-In addition to each rear end part of the snap pin 31 and the pin holder 32, the contact holder 33 may cover the part before it from the back.

<About the elastic member 41>
The elastic member 41 may be formed in a shape in which the rigidity in the direction along the axis L2 is higher than the rigidity in the direction orthogonal to the coaxial line L2. For example, the elastic member 41 has the above-described shape by making the cross-sectional shape of the elastic member 41 in the cross section including the axis L2 elongated in the direction along the coaxial line L2 rather than the direction perpendicular to the coaxial line L2. It is possible.

  If it does in this way, the elastic member 41 will become easy to deform | transform rather than the direction along the axis line L2 with respect to the direction orthogonal to the axis line L2. Therefore, when the steering wheel 10 vibrates in a direction orthogonal to the axis L2 of the elastic member 41, for example, in the vertical direction or the left-right direction, the elastic member 41 is elastically elastic in the same direction at a resonance frequency that is the same as or close to the vibration frequency. By causing the airbag device 20 to vibrate while being deformed, the vibration of the steering wheel 10 is satisfactorily suppressed.

  The steering wheel 10 employs a structure that elastically deforms the elastic member 41 when the airbag device 20 is pushed down in order to operate the horn device 40. Therefore, the ease of elastic deformation of the elastic member 41 has a considerable influence on the operation load when the airbag device 20 is pushed down. In this regard, the elastic member 41 is less likely to be deformed in the direction along the axis L2 than in the direction orthogonal to the axis L2. Therefore, the degree of influence of the elastic member 41 on the operation load when the airbag device 20 is pushed down is smaller than when the elastic member 41 is more easily deformed in the direction along the axis L2 than in the direction orthogonal to the axis L2. .

  -As the elastic member 41, what has a shape different from the said embodiment may be used. Accordingly, the shapes of the pin holder 32 and the damper holder 42 may be changed. FIGS. 11A to 11C show an example.

FIG. 11A shows a modification in which a gap (a space in which the elastic member 41 can be deformed) is not formed between the rear portion 41 c of the elastic member 41 and the pin holder 32.
FIG. 11B shows a modification in which the front surface and the rear surface of the elastic member 41 are both tapered so that the diameter of the elastic member 41 decreases toward the front side. Between the rear portion 41c of the elastic member 41 and the pin holder 32, an inner gap portion G1 and a rear gap portion G2 are formed as in the above embodiment.

  FIG. 11C shows a modification in which the tapered surface 41b is formed only at the intermediate portion in the direction along the axis L2 among the inner peripheral surface of the elastic member 41. Accordingly, the shapes of the inner gap portion G1 and the rear gap portion G2 are different from the shapes of the inner gap portion G1 and the rear gap portion G2 in the above embodiment.

-A space | gap part may be comprised only by one side of the internal space | gap part G1 and the back space | gap part G2.
The elastic member 41 may be formed integrally with the cylindrical portion 32a of the pin holder 32. This can be achieved, for example, by performing so-called insert molding in which the pin holder 32 is placed in the mold as an insert member and an elastic material is injected outside the cylindrical portion 32a of the pin holder 32.

<About locking part and locked part>
-The locking portion and the locked portion are defined as the recess (annular recess 41d) and the protrusion (annular protrusion 42c) on the condition that the locking portion is locked to the locked portion. It may be changed to a different shape.

  In addition to the annular recess 41d provided over the entire circumference of the outer peripheral portion of the elastic member 41, the locking portion may be configured by a plurality of recesses provided in a state of being spaced apart from each other in the circumferential direction of the outer peripheral portion. . In this case, the locked portion is constituted by a plurality of protrusions provided in a state of being separated from each other in the circumferential direction of the inner peripheral portion of the damper holder 42, instead of the annular protrusion 42c. And each elastic part 41 is latched by the damper holder 42 because each recessed part is engaged with the corresponding protrusion.

<Others>
The pin holder 32 may be urged rearward by a spring of a different type from the coil spring or an urging member different from the spring.

  As shown in FIG. 12, a sheet 43 formed of a softer material (for example, rubber, elastomer, etc.) than the pin holder 32 is disposed between the contact holder 33 and the enlarged diameter portion 32b of the pin holder 32. May be.

  In this way, when the steering wheel 10 vibrates, the pin holder 32 is received by the soft sheet 43, thereby suppressing the hard pin holder 32 from contacting the hard contact holder 33 and generating abnormal noise. Can do. The sound produced when the hard pin holder 32 comes into contact with the soft sheet 43 is less likely to sound than the sound produced when the pin holder 32 comes into contact with the hard contact holder 33.

  The sheet 43 may be fixed to the contact holder 33 with an adhesive or the like after the contact holder 33 is formed. Further, the sheet 43 and the contact holder 33 may be integrated by performing the so-called insert molding in which the sheet 43 is disposed in the mold as an insert member and a resin material is injected around the sheet 43. .

The effect similar to the above can be obtained by forming the entire contact holder 33 with a softer material (for example, rubber, elastomer, etc.) than the pin holder 32.
The steering wheel can be applied to a steering wheel of a steering device in a vehicle other than a vehicle, such as an aircraft or a ship.

  DESCRIPTION OF SYMBOLS 12 ... Core metal, 20 ... Airbag apparatus, 21 ... Bag holder, 31 ... Snap pin (support member), 31a ... Gutter part, 31f ... Main-body part, 32 ... Pin holder (slider), 32a ... Cylindrical part, 32b ... Expanded portion, 32e ... annular groove, 33 ... contact holder (cap member), 34 ... contact terminal (movable side contact portion), 36 ... coil spring (biasing member), 40 ... horn device, 41 ... elastic member, 41c ... rear part of elastic member, 41d ... annular recess (locking part, recess), 42 ... damper holder, 42c ... annular protrusion (locked part, protruding part), G1 ... inner cavity (gap), G2 ... rear Cavity part (gap part), L1, L2 ... axis.

Claims (6)

A support member supported by the cored bar in a state inserted through the bag holder of the airbag device;
A slider that is slidably disposed outside the support member and is urged rearward by the urging member;
A cap member that covers at least each rear end portion of the support member and the slider from the rear in a state of being separated rearward from the rear end portion of the slider;
An annular damper holder attached to the cap member and having a locked portion;
An annular elastic member that is attached to the outside of the slider in a state in which movement in the direction along its own axis is restricted, and is locked to the locked portion at a locking portion provided on the outer periphery of the slider; And when the airbag device is not pressed down, the airbag device functions as a damper mass of a dynamic damper, and the elastic member functions as a spring of the dynamic damper, and when the airbag device is pressed down, the elastic member The cap member is moved forward while being deformed and brought into contact with the rear end of the slider, and the slider is slid forward against the biasing member, so that the movable contact portion is A steering wheel configured to operate a horn device in contact with a support member. The locked portion is constituted by a protrusion protruding from the inner peripheral surface of the damper holder,
The steering wheel according to claim 1, wherein the locking portion is formed by a concave portion provided on an outer peripheral portion of the elastic member and engaged with the protrusion. 2. An annular groove that engages with an inner circumferential portion of the elastic member is formed on an outer peripheral portion of the slider, and movement of the elastic member in a direction along the axis is restricted by the annular groove. Or the steering wheel of 2. 4. The steering wheel according to claim 3, wherein a gap is formed between a rear portion of the elastic member positioned rearward of an engagement portion with the annular groove and the slider. The support member includes a long main body portion, and a collar portion formed on the rear end portion of the main body portion with a larger diameter than the main body portion,
The slider includes a cylindrical portion through which the main body portion is inserted, and a diameter-enlarged portion that is formed at a rear end portion of the cylindrical portion and surrounds the flange portion,
The gap is formed between an inner gap formed between the rear part of the elastic member and the cylindrical part of the slider, and between the rear part of the elastic member and the diameter-enlarged part of the slider. The steering wheel according to claim 4, further comprising at least one of the rear gaps. The steering wheel according to any one of claims 1 to 5, wherein the elastic member is formed in a shape in which rigidity in a direction along the axis is higher than rigidity in a direction perpendicular to the coaxial line.