| 摘要 |
PURPOSE:To prevent the generation of noises and oscillations by varying the impressed voltages to a pair of electromagnetic coils and polarities by a control means to change the position of the movable part of a lens mechanism connected to a movable magnet, thereby adjusting a camera lens. CONSTITUTION:This mechanism has the lens mechanism 14, the movable part 18 of which is movable in the axial line direction of a lens barrel 20 and the movable magnet 32 which is formed of a permanent magnet and is fitted onto the lens barrel 20 movably in the axial line direction of a lens barrel 20 and is connected with the movable part 18 integrally. The movable magnet 32 repulse with the magnetic forces of the electromagnetic coils 22a, 22b when the voltage is impressed to the electromagnetic coils 22a, 22b, and move by overcoming the energizing force of coil springs 24a, 24b. The movable part 18 corresponding to a focusing mechanism moves in the axial line direction of the lens barrel 20. The generation of the noises and oscillation is entirely obviated in this way. |
