Airbag device provided to steering wheel
To provide an airbag device provided in a steering wheel, which enables an airbag module to be made smaller so as to be compatible with a steering wheel having a smaller center pad than conventional ones. The airbag device includes an airbag module containing an airbag cushion and a cylindrical inflator that supplies inflator gas to the airbag cushion, a damper unit that dampens vibrations transmitted between the airbag module and the steering wheel, a mounting member formed of a plate material and to which the inflator and the damper unit are assembled, and an elastic member that is provided between the mounting member and the steering wheel and elastically holds the airbag module to the steering wheel. The mounting member is formed with a circular through-hole part for press-fitting the inflator to secure the inflator, and a retaining part for holding the damper unit.
1 . An airbag device provided in a steering wheel, comprising:
an airbag module containing an airbag cushion and a cylindrical shaped inflator that supplies inflator gas to the airbag cushion;
a functional component provided between the airbag module and the steering wheel; and
a monolithic mounting member formed of a pressed plate material to which the inflator and the functional component are assembled, wherein the mounting member has formed thereon:
a retaining part for retaining the functional component;
a circular through-hole part into which the inflator is press-fit to secure the inflator, the circular through-hole part including:
a circular hole formed in the mounting member penetrating in an axial direction perpendicular to a center of a bottom surface of the inflator and into which the inflator is pressed; and
an annular rib formed on an inner circumferential edge of the circular hole and pressed onto a circumferential side surface of the inflator, wherein the annular rib is directly connected to the retaining part via a solid wall; and
a flat part on an outer circumference of the circular through-hole part, wherein the retaining part is provided so as to have a step with regard to the flat part, and wherein the step is characterized by the solid wall extending from the flat part and forming an inner groove part, the retaining part being formed on this inner groove part.
2 . The airbag device provided in a steering wheel according to claim 1 , wherein an annular stopper is provided on the circumferential side surface of the inflator between the annular rib and a gas discharge hole of the inflator.
3 . The airbag device provided in a steering wheel according to claim 1 , wherein the functional component is a damper unit that dampens vibration transmitted between the airbag module and the steering wheel, is provided between the mounting member and the steering wheel, and includes an elastic member that elastically holds the airbag module on the steering wheel.
4 . The airbag device provided in a steering wheel according to claim 1 , wherein the airbag module is provided with a securing member attached and secured to the mounting member, and wherein a first end of the functional component is held between the securing member and the mounting member, and a second end is held on the steering wheel.
5 . The airbag device provided in a steering wheel according to claim 4 , wherein the airbag module is provided with a cover for covering the airbag cushion and this cover is attached to the securing member.
6 . The airbag device provided in a steering wheel according to claim 1 , wherein the mounting member is provided with an annular reinforcing wall part surrounding a flat part of the mounting member and the retaining part.
7 . The airbag device provided in a steering wheel according to claim 6 , wherein the airbag module is provided with a cover for covering the airbag cushion and this cover is attached to the reinforcing wall part.
8 . An airbag device provided in a steering wheel, comprising:
an airbag module containing an airbag cushion and a cylindrical shaped inflator that supplies inflator gas to the airbag cushion;
a functional component provided between the airbag module and the steering wheel; and
a monolithic mounting member formed of a pressed plate material to which the inflator and the functional component are assembled, wherein the mounting member has formed thereon:
a retaining part for retaining the functional component; and
a circular through-hole part into which the inflator is press-fit to secure the inflator, the circular through-hole part including:
a circular hole formed in the mounting member penetrating in an axial direction perpendicular to a center of a bottom surface of the inflator and into which the inflator is pressed; and
an annular rib formed on an inner circumferential edge of the circular hole and pressed onto a circumferential side surface of the inflator, wherein the annular rib is directly connected to the retaining part via a solid wall, the solid wall being parallel to the annular rib and perpendicular to the retaining part.
9 . The airbag device provided in a steering wheel of claim 8 , wherein peripheral portions of the solid wall extend out from the annular rib in two directions to form an inner groove part, the retaining part being formed on the inner groove part.
10 . The airbag device provided in a steering wheel of claim 9 , wherein the peripheral portions of the solid wall extend out from the annular rib in the two directions to a periphery of the mounting member.
11 . An airbag device provided in a steering wheel, comprising:
an airbag module containing an airbag cushion and a cylindrical shaped inflator that supplies inflator gas to the airbag cushion;
a functional component provided between the airbag module and the steering wheel; and
a monolithic mounting member formed of a pressed plate material to which the inflator and the functional component are assembled, wherein the mounting member has formed thereon:
a retaining part for retaining the functional component;
a flat part parallel to the retaining part; and
a circular through-hole part into which the inflator is press-fit to secure the inflator, the circular through-hole part including:
a circular hole formed in the mounting member penetrating in an axial direction perpendicular to the flat part and into which the inflator is pressed; and
an annular rib formed on an inner circumferential edge of the circular hole and pressed onto a circumferential side surface of the inflator, wherein the annular rib is directly connected to the retaining part via a solid wall extending from the flat part to the retaining part.
12 . The airbag device provided in a steering wheel of claim 11 , wherein the solid wall extends out from the annular rib in two directions to form an inner groove part, the retaining part being formed on the inner groove part.
13 . The airbag device provided in a steering wheel of claim 12 , wherein the solid wall extends out from the annular rib in the two directions to a periphery of the mounting member.