RESILIENT DRIVING FORCE MEMBER

摘要

A resilient driving force member 10 having at least one helical spring 16, each helical spring 16 having an support member 14 connected to one end thereof and an engaging portion 20 connected to the other end, the engaging portion extending further from an axis X central to the turns of the helical spring 16 than the turns, where the engaging portion 20 of the resilient driving force member 10 is adapted to engage a corner or side of another driving force member of substantially similar size having either a twisted or non-twisted recess such that, when so engaged, rotational driving force can be transferred from one driving force member to the other.