| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter change-over device that reduces a transmission loss of driving force in an initial operation position of an operation arm, and can curb increase in a minimum operation voltage.SOLUTION: A filter change-over device comprises: a change-over member 2 that has a filter 2A and a transparent glass plate 2B lined in one axis direction; a support member 3 that supports the change-over member 2 freely slidable along the one axis direction; and an operation drive unit 4 that slides the change-over member 2 toward the one axis direction. The operation drive unit 4 comprises: a driving shaft that performs a reciprocal rotation drive; and an operation arm 5 whose one end side is mounted to the driving shaft and tip end side slides, and the operation arm 5 comprises: a first boss 5A; and a second boss 5B. The first boss 5A is connected to the change-over member 2 via a long hole 20 extending in a direction crossing the one direction, and the second boss 5B abuts against an abutting section 21 crossing the one direction in the change-over member 2 at an initial operation position of the operation arm 5.SELECTED DRAWING: Figure 3 |
