Airbag unit, fastening structure, and fastening member

An airbag unit comprising:

• an airbag;
• a cover part which covers the airbag;
• a fitting member which is fitted on a front side of the cover part;
• and
• a fastening member which fastens the fitting member on a back side of the cover part,
• wherein the fastening member includes
• a first fastening part which is inserted from a side into a first locking part provided on the fitting member, in a state in which the first locking part penetrates the cover part to a back side of the cover part,
• a second fastening part which is inserted from the side into a second locking part provided on the fitting member, in a state in which the second locking part penetrates the cover part to the back side of the cover part, and
• a connecting part which connects a base end part of the first fastening part and a base end part of the second fastening part,
• wherein external shapes of the first fastening part and the second fastening part are mutually different,
• wherein the first fastening part includes a non-insertable part which is formed to be non-insertable into the first locking part from a side opposite to a correct side,
• wherein the first locking part includes a first inserted part and a second inserted part arranged in an inserting direction of the first fastening part, and
• wherein the non-insertable part is formed to be insertable into the first inserted part from the correct side, and non-insertable into the second inserted part from the side opposite to the correct side.

An airbag unit comprising:

• an airbag;
• a cover part which covers the airbag;
• a fitting member which is fitted on a front side of the cover part;
• and
• a fastening member which fastens the fitting member on a back side of the cover part,
• wherein the fastening member includes
• a first fastening part which is inserted from a side into a first locking part provided on the fitting member, in a state in which the first locking part penetrates the cover part to a back side of the cover part,
• a second fastening part which is inserted from the side into a second locking part provided on the fitting member, in a state in which the second locking part penetrates the cover part to the back side of the cover part, and
• a connecting part which connects a base end part of the first fastening part and a base end part of the second fastening part,
• wherein external shapes of the first fastening part and the second fastening part are mutually different,
• wherein at least one of the first and second fastening parts includes a disengagement preventing part which prevents the one of the first and second fastening parts from disengaging from the locking part through which the one of the first and second fastening parts is inserted,
• wherein the disengagement preventing part includes a first contact part provided on a tip end part side of at least one of the first and second fastening parts, and the first contact part makes contact with the tip end part side of the locking part through which the at least one of the first and second fastening parts is inserted,
• wherein the first contact part includes
• a contact part on a first tip end part side provided on the tip end part side of the first fastening part, and
• a contact part on a second tip end part side provided on the tip end part side of the second fastening part, and
• wherein the contact parts on the first and second tip end part sides are provided at mutually different positions along the direction in which the first and second fastening parts extend.

A fastening structure comprising:

• a cover part which covers an airbag;
• a first locking part and a second locking part provided on a fitting member which is fitted on a front side of the cover part;
• and
• a fastening member which fastens the fitting member on a back side of the cover part,
• wherein the fastening member includes
• a first fastening part which is inserted from a first side of the fitting member into the first locking part to a first inserted position in a state in which the first locking part penetrates the cover part to a back side of the cover part,
• a second fastening part which is inserted from the first side of the fitting member into the second locking part to a second inserted position in a state in which the second locking part penetrates the cover part to the back side of the cover part, and
• a connecting part which connects a base end part of the first fastening part and a base end part of the second fastening part, to form the fastening member into an approximate U-shape that fastens the fitting member on the back side of the cover part viewed in a direction generally perpendicular to the back side of the cover part,
• wherein external shapes and or sizes of the first fastening part and the second fastening part are mutually different to prevent insertion to the first and second fully inserted positions, respectively, when the fastening member is inserted into the first and second locking parts at an incorrectly oriented setting, and
• wherein the incorrectly oriented setting of the fastening member includes at least one of the first fastening part being inserted into the second locking part, the second fastening part being inserted into the first locking part, and the first and second fastening parts being inserted from an incorrect, second side of the fitting member opposite to the first side.