Airbag unit

1. An airbag unit comprising:

an airbag that covers, upon being unfolded, at least a part of a hood or a windshield outside a vehicle;

a gas generator that ejects gas into the airbag;

a cover bottom member that accommodates therein the airbag yet to be expanded and the gas generator;

a cover lid member that covers the cover bottom member in which the airbag is accommodated; and

a bracket removably supported by a body of the vehicle, and removably supporting the cover bottom member and the cover lid member;

wherein

the cover lid member has a mounting part that projects from at least one side of the cover lid member in a width direction thereof to engage with a cowl cover disposed in an area between the hood and the windshield of the vehicle, with the mounting part being mounted in contact with a lower portion of the cowl cover,

the airbag travels through an opening formed in a central region of the cowl cover during inflation.

2. The airbag unit according to claim 1 , further comprising a stopper fixed to at least one of the cover bottom member, the cover lid member, and the bracket, so as to oppose a surface of the cover bottom member and the cover lid member extending in a longitudinal direction.

3. The airbag unit according to claim 2 ,

wherein the stopper is fixed to the cover bottom member and the cover lid member on a side of the hood.

4. The airbag unit according to claim 1 ,

wherein a cover bottom plate of the cover bottom member and the bracket may be formed such that a central portion in the longitudinal direction is elevated upward with respect to end portions.