| 摘要 |
<p>PURPOSE:To automatically lock and unlock a correction optical system without any troublesome operation by operating a switch for photography preparing operation start and a lock means associating with the state change of the switch. CONSTITUTION:A latch solenoid 428 is fed with electricity associating with a switch for starting photographic operation so that the magnetic force of a permanent magnet is canceled, and then a slider 428a is moved with the energizing force of a coil spring 42 as shown by an arrow 423, i.e. in an unlocking direction; and a plate 424 abuts on a shaft 426 and an unlocked state is entered. Further, the latch solenoid 428 is fed with electricity so as to increase the magnetic force of the permanent magnet and then the slider 428a receives the force as shown by an arrow 422 to lock a recessed part 420 as an engaged part. Thus, the plunger type solenoid 428 is fed with electricity only when the two locked and unlocked states are switched and no electric feeding is required to maintain the two states.</p> |
