| 摘要 |
PURPOSE:To stop the lens at accurate position, by controlling the rotation driving source and lens stopping means individually. CONSTITUTION:A supporting base 22 to which is secured a lens-barrel B of a lens 16 moving reciprocally along quide 24, 25 is secured to a moving base 23. A rotating plate 32 equipped with magnets 491, 492 and coil springs 41, 44 are provided between said moving base 23 and a unidirection rotating motor 27 which is a rotation driving source. In this setting, when a variable power button is depressed, a solenoid 50 is energized, and a stopping plate 51 rotates downward by a specified angle. At the same time, the rotating plate 32 rotates in one specified derection, and the magnet 491 reaches a corresponding hole position, before the lens 16 reaches the stopping position corresponding to the selected magnification, and issues a signal, so that the solenoid 50 is cut off, then the stopping plate 51 rotates reversely. Consequently, a roller 56 is engaged with one of stepped parts 53-55 by the action of coil springs 41, 44, and the lens 16 stops. Later, the magnet 492 reaches the corresponding hole position, and the motor 27 is stopped by the signal generated, so that the lens 16 may be stopped at a correct position. |
