Device for protecting user's head, airbag for the same, and method of manufacturing the airbag

A head protection device comprising:

• an airbag receiving case configured to be flexibly bent around a user's neck, and including a first end and a second end configured to be releasably fastened to each other;
• an airbag folded and stored in the airbag receiving case;
• and
• an inflator part including a battery and configured to supply inflated gas to the airbag,
• wherein the airbag receiving case includes a middle part which is connected to the inflator part, a right fastening part located at the first end of the airbag receiving case, and a left fastening part located at the second end of the airbag receiving case, the right fastening part and the left fastening part releasably fastened to each other.

An airbag for head protection, the airbag comprising:

• an occipital part configured to protect a back part of a head of a user when inflated, the occipital part including an inlet through which inflated gas is configured to flow into;
• a front upper head part configured to protect a front part and an upper part of the head, the front upper head part extending from and being in communication with the occipital part, and the front upper part including an upper right edge and an upper left edge;
• a right part configured to protect a right area of the head, the right part extending from and being in communication with the occipital part, and the right part including a first right edge and a second right edge, which are both connected to the upper right edge;
• and
• a left part configured to protect a left area of the head, the left part extending from and being in communication with the occipital part, and the left part including a first left edge connected to the upper left edge and a second left edge connected to the second right edge.