| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical element switch device where the occurrence of a shock is prevented and heat generation is suppressed at the time of switching an optical element by driving the movement of a moving member by a motor and converting a rotary operation into a linear operation during a driving transmission route to the moving member. SOLUTION: When a crank 8 rotates with the rotary shaft 91 of a pulse motor 9 as the center, a roller 7 moves in an oblong hole 62 of a plate 6 while it turns in the longitudinal direction. Since a balancer is installed in the other end part of the crank 8, the balance of the crank 8 is kept with the rotary shaft 91 of the pulse motor 9 as the center. A straight line connecting the center of the roller 7 at one end part of the crank 8 and the center of the rotary shaft 91 of the pulse motor 9 becomes parallel to a direction where a moving block 3 moves Namely, since power is supplied to the pulse motor 9 only when a prism 1 and a prism 2 are switched, the rise of the temperature of the pulse motor 9 can be suppressed to be low.
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