| 摘要 |
PROBLEM TO BE SOLVED: To provide a mirror quick return mechanism capable of an accurate, high speed operation by eliminating the occurrence of a time loss, in a method for electronically controlling rotation phase control at each operation point even in a system in which a photographing operation by motor drive is performed by normal/reverse rotation of the motor or in a system in which it is performed by unidirectional rotation of the motor. SOLUTION: A cam block CB integrally molded with a cam disk 21 provided in order to perform a series of photographing operations including the lifting of a mirror, the starting of a shutter, the lowering of the mirror and the charging of a shutter, a braking disk A23A and a braking disk B24 for determining the starting position of the lifting of the mirror and a shutter charge completion position, and a cam gear 20 for rotation interlock is constituted to cause a braking lever A27 and braking lever B33 disposed on its circumference to perform position regulation by rotation braking to the lifting position of the mirror and the shutter charge completion position and resetting for permitting rotation by unidirectional rotation of the cam block CB. COPYRIGHT: (C)2006,JPO&NCIPI
|
