| 摘要 |
PURPOSE:To effectively suppress vibrations that can not be ignored which are caused by a subordinate reflecting mirror and to eliminate camera shake by providing a main balance weight which suppresses a camera shake caused principally by a main reflecting mirror and a subordinate balance weight which suppresses a camera shake caused principally by the subordinate reflecting mirror. CONSTITUTION:When the main balance weight 12 rotates counterclockwise, a shaft 16 which supports the subordinate balance weight 13 rotatably rotates counterclockwise around a pin shaft 11 together with the main balance weight 12. The bent part 13B of the subordinate balance weight 13 which engages a fixed pin 17 through an engagement groove 13C by the rotation of the shaft 16 revolves counterclockwise around the pin shaft 11 and also is rotated and displayed counterclockwise around the shaft 16 at the same time. The whole subordinate balance weight 13 is rotated and displayed counterclockwise around the shaft along with the bent part 13B. Then, when the main balance weight 12 moves to a lower position, the subordinate balance weight 13 reaches a shelter position parallel to the top surface of the main balance weight 12.
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