Patent ID: 7103273

Claim:
An AF driving mechanism of a single lens reflex camera comprising: a motor at least one portion of which is positioned at the bottom of a camera body, a rotating shaft of said motor being perpendicular to an optical axis of a lens barrel mounted on said camera body; a worm gear that is provided on said rotating shaft; a first cylindrical member that includes a wheel gear which is in engagement with said worm gear, said wheel gear being formed on an outer surface of said first cylindrical member; an AF coupler that includes a joint portion for connecting to said lens barrel; a second cylindrical member that supports said AF coupler; and a connecting member that connects said first cylindrical member and said second cylindrical member; wherein said AF driving mechanism is provided in a space which is defined by a lower portion of the arc periphery of a lens mount and a tangent of the point which is on the periphery of a lens mount and which is closest to the bottom of said camera body.