Support structure for airbag apparatus

A support structure for an airbag apparatus, the support structure comprising:

• the airbag apparatus that includes a bag holder in its front portion and functions as a damper mass of a dynamic damper;
• a supporting member that includes a shaft portion, the shaft portion including a flange at a rear end and extending in a front-rear direction while being passed through the bag holder, the supporting member being attached to a metal core of a steering wheel at a front end of the shaft portion;
• a slider that is fitted around the shaft portion to be slidable in the front-rear direction;
• a damper holder that is attached to the airbag apparatus while covering part in the front-rear direction of the slider;
• and
• an annular elastic member that is arranged between the slider and the damper holder and functions as a spring of the dynamic damper, wherein
• the elastic member includes protrusions that protrude rearward from the elastic member so as to contact the flange, thereby partially filling a gap between the elastic member and the flange,
• the protrusions are spaced apart from each other in a circumferential direction of the elastic member,
• the protrusions extend radially with an axis of the supporting member serving as a center,
• the elastic member includes auxiliary projections, each auxiliary projection being located between adjacent two of the protrusions,
• the auxiliary protrusions protrude rearward so as to contact the flange, thereby partially filling the gap, and
• the auxiliary protrusions do not extend radially with the axis serving as a center.

A support structure for an airbag apparatus, the support structure comprising:

• the airbag apparatus that includes a bag holder in its front portion and functions as a damper mass of a dynamic damper;
• a supporting member that includes a shaft portion, the shaft portion including a flange at a rear end and extending in a front-rear direction while being passed through the bag holder, the supporting member being attached to a metal core of a steering wheel at a front end of the shaft portion;
• a slider that is fitted around the shaft portion to be slidable in the front-rear direction;
• a damper holder that is attached to the airbag apparatus while covering part in the front-rear direction of the slider;
• and
• an annular elastic member that is arranged between the slider and the damper holder and functions as a spring of the dynamic damper, wherein
• the elastic member includes protrusions that protrude rearward from the elastic member so as to contact the flange, thereby partially filling a gap between the elastic member and the flange,
• the protrusions are spaced apart from each other in a circumferential direction of the elastic member,
• the protrusions extend radially with an axis of the supporting member serving as a center, the gap between the elastic member and the flange is a rear gap,
• the protrusions that partially fill the rear gap are rear protrusions,
• the elastic member includes front protrusions that protrude outward in a radial direction of the shaft portion from the elastic member so as to contact the damper holder, thereby partially filling a front gap between the elastic member and the damper holder, and
• the front protrusions are spaced apart from each other in the circumferential direction.