| 摘要 |
PURPOSE:To improve reliability by providing a sensing mechanism having a weight to be swung by a predetermined or stronger impact an output member to be pivoted by the swinging, and a safety mechanism removing from the weight by the pivoting. CONSTITUTION:A sensing mechanism 3 has a frame 31, a weight 32, a firing lever 33 and a spring 34. A safety mechanism 4 has a lock cam 41, a lock lever 42 and a spring 43. When a predetermined or stronger impact is input, the weight 32 is swung against an energizing force of the spring 34 at a pin 35 as a center. In this case, since an swing center of the weight 32 is offset from a center of gravity, an inertial moment of the weight 32 is operated at the swing of the weight 32. Since the weight 32 is not swung by an instantaneous predetermined or stronger impact but swung only by a predetermined or stronger impact which is continued to a certain degree, impact sensing performance is improved. |
