Airbag and airbag apparatus

摘要

In order to provide an airbag (10) that is constructed such that a gas-discharging amount from a venthole (18) becomes largest when an occupant (P) comes in contact with a center portion, in the left and right direction, of an occupant-facing surface of the expanded airbag (10), and an airbag apparatus provided with the airbag, a hanging strap (80) that couples a center portion of a front panel (12) and a rear panel (14) is provided in the airbag (10). A lid body (60) that covers the open-and-close type venthole (18) from outside the airbag (10), and the hanging strap (80) is coupled by means of a tether (70). In a case that the airbag (10) is expanded, the hanging strap (80) and the tether (70) are tensed, and the lid body (60) is brought to a state to close the open-and-close type venthole (18). A loosening amount of the hanging strap (80) and the tether (70) becomes largest when the occupant (P) comes in contact with the center portion of the front panel (12) of the expanded airbag (10) and causes the center portion to retreat, and an opening amount of the open-and-close type venthole (18) also becomes largest.