| 摘要 |
PROBLEM TO BE SOLVED: To prevent the scattering of broken pieces of a squib cup to a bag by forming, on the squib cup, a groove for breaking the squib cup into broken pieces of a size not passable of the hole of an injection part at ignition of an igniter. SOLUTION: A ring-like groove 171 having a diameter larger than the inside diameter of a base seat is formed on the end surface 11a of a squib cup 11, and the thickness of the thin part 171a of the groove 171 is set smaller than the thickness of the squib cup 11. When the squib cup 11 is broken by the pressure of the gas generated by the ignition of an igniter 12, the squib cup 11 is easily cut in the part of the groove 171. A broken piece 21 ruptured from the end surface 11a has a disc-like form. The diameter (r) of the groove 171 is designed so that the broken piece 21 has a size not passable of the hole of a screen (the hole of an injection part). According to such a constitution, the broken piece 21 can be surely prevented from being scattered to the back through the hole of the screen or the discharge port of a diffuser. |
