| 摘要 |
PROBLEM TO BE SOLVED: To enhance shock resistance, when electric current or voltage is interrupted by providing cushioning member, such as a spring or a cushioning member of rigidity lower than a mechanism system forming material between mechanism parts for triggering a drive power source such as hydraulic pressure, air pressure or a spring or between frames for engaging these mechanism parts. SOLUTION: A rotational level 31, rotated by an armature 1 for attracting an electromagnetic coil 41, rotates a hook 32 to release the engagement with a lever 34, and a spring 36 moves a link 35 to open an air valve. An armature- positioning pin 11, mounted on a portion 101 of a frame for adjusting a gap 37 between the rotational lever 31 and the hook 32, is composed of a cushioning material such as a rubber or metallic member coated therewith. A spring constant, etc., of the positioning pin 11 is set, corresponding to the angular frequency of input acceleration. A spring may be sandwiched between the positioning pin 11 and the frame and adjusted by a nut also. A slit which is fixed with a rubber, etc., may be disposed on the contact part of the hook 32 for contacting/separating to from the armature.
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