Patent ID: 7568706

Claim:
A system for converting a force applied in one direction to a rotational force comprising: a pressure part for receiving an operative force in a first direction; a motive force transfer mechanism comprising two arms joined at a pivot point and moveable relative to each other in a scissors fashion between at least two states including an uncompressed state and a compressed state, the motive force transfer mechanism being operatively coupled to the pressure part, for moving the two arms from the uncompressed state to the compressed state upon a suitable force in the first direction being received by the pressure part; a bias member that provides a bias force on at least one of the two arms, for biasing the two arms toward the uncompressed state, a spin restricting mechanism with at least two parts, a first part and a second part that are arranged to be coupled and rotate together around a shared axis in a first rotary direction, but may rotate independently around the shared axis in a second rotary direction opposite to the first rotary direction; and a linkage structure for operatively linking at least one of the two arms to the first part of the spin restricting mechanism, to communicate movement of at least one of the arms from the uncompressed state to the compressed state into rotational motion of the first part of the spin restricting mechanism in the first rotary direction.