Acceleration detector in vehicle, has spring support unit displaced from rotor along predetermined direction by preset amount so that spring effect center of torsion spring agrees with rotation center of rotor

摘要

A torsion spring (51) is supported in a housing (10) through a support unit (30b), so that biasing force of spring is dampened with respect to an acceleration. Torsion spring is formed integrally with the rotor (30). Support unit is displaced from rotation center of rotor along specific direction, so that the spring effect center of the spring, due to an input torque agrees with rotation center of rotor.