Patent ID: 7905512

Claim:
A vehicular instrument panel, comprising: a door portion provided on the instrument panel at a position corresponding to an air bag; and a tear line provided on the instrument panel to define a boundary between the door portion and the instrument panel, the tear line comprising: an exploding section having first protrusions and first recesses, wherein the exploding section is configured to be torn firstly upon inflation of the air bag; sidewall sections having second protrusions and second recesses, wherein the sidewall sections are configured to be torn secondly upon the inflation of the air bag; a hinge section having third protrusions and third recesses, wherein the hinge section is configured to be torn thirdly upon the inflation of the air bag; and the first protrusions having a thickness equal to a thickness of the second protrusions, the first protrusions having a length equal to a length of the third protrusions, and a thickness of the third protrusions being greater than the thickness of the first protrusions and the thickness of the second protrusions, wherein the tear line is configured to be torn upon collision.