| 摘要 |
PURPOSE:To obtain a transitting device for driving power which is small in size, is hard to generate unnecessary pressure and abrasion and decreases the reduction in transmission efficiency by so constituting the same that a driving shaft and a driven shaft are butted on the same axial line parallel with the optical axis and driving force is transmitted by the intermeshing thereof. CONSTITUTION:When an interchangeable lens 2 is pressed to a camera body against the pressures of springs 8, 15 and the lens 2 is rotated, a positioning part 10 is inserted into a positioning recess 64 by the pressure of the springs 8, 15 at the time when the recess 64 turns round to a positioning member 9, then the lens 2 is locked in the predetermined position. In this time, a movable electrode 26 contacts with a stationary electrode 27 and a motor 22 begins to run. At the moment when the positions of an engaging pawl 17 and an engaging recess 62 mate, the pawl and recess are intermeshed by the effect of the spring 15 by which driving force is transmitted to the interchangeable lens side. Since a driving shaft 13 and the 2nd driving shaft 60 are held engaged at the axial line parallel with the optical axis, unnecessary pressure and abrasion are hard to be generated and the reduction in transmission efficiency is less. |
