| 摘要 |
An inertia responsive actuating device for safety belt retractors comprises a support having a substantially circular hole and an upwardly facing conical surface surrounding the hole and sloping upwardly in all directions from the hole. An inertia mass supported on the support has a locating projection that is received in the hole and a spherical surface surrounding the projection and adapted to roll up the surface of the support in response to an inertial force on the mass. A portion of an actuator engages an upwardly facing surface on the mass and is displaceable generally upwardly in response to rolling motion of the mass. A cam surface on the upper portion of the mass cooperates with a cam follower element on the actuator such that the vertical displacement of such portion of the actuator is substantially greater than the vertical displacement of the mass itself when the mass rolls up the conical surface of the support. |
