| 摘要 |
A device for controlling the locking and unlocking operations of a gear wheel-rotary disc assembly comprises a ball for circulating screw having one end thereof coupled to a rotating coupling member. The screw is in turn rotatably engaged in a fixed ring-nut, which is housed in the bed of the device, to allow the screw to be axially driven, under the control of a driving motor. With respect to prior like devices, the inventive device allows the rotary disc to be driven quicker and more accurately from a locking position to an unlocking position thereof. <IMAGE> |
