Patent ID: 6860653

Claim:
A camera assembly comprising: a support defining an optical axis; a traveler being reversibly movable along said optical axis, relative to said support, from a retracted position, through a plurality of intermediate positions, to an extended position, said traveler having opposed first and second contact surfaces; a guide extending outward from said support, said guide having a forward rest facing said first contact surface and a rear rest facing said second contact surface, said rests each being aligned with said optical axis; a twist ring, disposed on said guide, said twist ring being rotatable relative to said guide about said optical axis and having a cam surface engaging a cam follower of said traveler; and a biaser biasing said traveler against said rear rest, when said traveler is in said retracted position, and against said forward rest, when said traveler is in said extended position, said biaser being spaced from said rests and said contact surfaces and being joined to said twist ring.