QUICK RETURNING DEVICE OF SINGLE-LENS REFLEX CAMERA

PURPOSE:To prevent a main movable mirror from rocking after returning and the main ovable mirror and a subordinate movable mirror from coming into contact with each other, by providing a quick returning mechanism which returns the subordinate movable mirror firstly and the main movable mirror secondarily to the returning behavior from an exposure state to a subject observation state. CONSTITUTION:When releasing operation is performed and the main movable mirror A and subordinate movable mirror B are put off an optical path of photography, one terminal of a lever 43 which constitute a cam part engages a main mirror driving pin 34. Then, a mirror driving lever 27 returns to a return position after exposure is completed. Consequently, the subordinate movable mirror returns to an observation position and the lever 43 is rotated counterclockwise with a subordinate mirror driving pin 38a. Therefore, the one terminal of the lever 43 disengages from the main mirror driving pin 34 and the main movable mirror A also returns to the observation position for the 1st time. Consequently, the rocking of the main movable mirror after its return and the contacting with each other of both mirrors are prevented.