| 摘要 |
A module cover for an air bag device having a recess caused by sink occuring near a tear line at the time of hardening of an outer layer and made inconspicuous, and having a flat outer surface and a superior external appearance, which is composed of an inner hard layer and outer soft one, provided with an extending tear line for starting tearing having a ridge-like projection (1C) rising from the inner layer (1A) at the boundary surface (20) between the inner layer (1A) and outer one (1B) as well as having a groove (2A) recessed in the inner surface of the module cover, said ridge-like projection (1C) being trapezoidal in cross-section in the direction perpendicular to the extending direction thereof and an angle between the slant surface (1E) of the frustum and said boundary surface (20) near the ridge-like projection being 30 DEG or under. <IMAGE> |
