| 摘要 |
PURPOSE:To improve positioning accuracy, to facilitate an accuracy adjustment, and to simplify a structure by engaging a positioning projection with one of positioning grooves and positioning a switch with the energizing force in a different direction from the moving direction of the switch. CONSTITUTION:A 1st positioning groove 13 which engages the positioning projection 5 at a stationary position and a 2nd positioning groove 14 which engages the projection at a switching position are formed in either of a fixed-side switching element 2 and a moving-side switching element 3 and the positioning projection 5 is engaged with the 1st positioning groove 13 or 2nd positioning groove 14 at the stationary position or switching position without fail. Each of the positioning grooves 13 and 14 is provided with an energizing means 9 which energizes the positioning projection 5 relatively and the switch is positioned with the energizing force in the different direction from the moving direction. Consequently, the switching is facilitated with the simple structure without spoiling the accuracy of optical path switching. |
