| 摘要 |
PURPOSE:To perform operation control with high accuracy by providing an interlocking member which is provided integrally with an optical member and a clamping means which fixes the optical member, moved by a driving means, continuously at a desired position by clamping the interlocking member. CONSTITUTION:A laminate type piezoelectric element 7 is fixed in the recessed part 4d of a holding member 4. The laminate type piezoelectric element 7 is an actuator which varies in its lengthwise size when a voltage is applied between its electrodes. When the voltage is applied to the laminate type piezoelectric element, the holding member 4 receives its elongation on its wall 4e, and consequently a holding part 4a rotates around a neck 4f as shown by an arrow. The gap quantity between holding parts 4a and 5a increases and the held member 3 is released from being clamped, so a photographic lens barrel 1 is guided in a guide hole 1a by a guide bar 8 to become freely movable in the direction of the optical axis. Consequently, the operation control over the optical member of the camera is performed with high accuracy. |
