| 摘要 |
PURPOSE:To adjust the contact-pressing force between a stator and a rotor excellently in a mount state by incorporating a member which makes the adjustment in a camera which uses an ultrasonic motor as the driving source for the mirror, stop, etc., so that the member can be operated from before the camera. CONSTITUTION:The ultrasonic motor 21 is fitted by a mirror box 51 so that its adjusting screw 45 is on the front surface side of the camera; and a cut hole 52a is bored in the front cover 52 of the camera. When the screw 45 is rotated, the pointed part of a rotary shaft 24c is guided to a cylinder part 28a through a pivot ball 44 and a sector gear 24 is displaced in the direction of the rotary axis to vary the elastic force of a leaf spring 40, thereby adjusting the press-contacting force of the rotor 38 to the stator 36. Consequently, while the mirror 22 and stop interlocking ring 23 are coupled as loads, the motor 21 can be adjusted to obtain the driving device with high operation accuracy. The cut hole 52a is filled with an adhesive or covered with a decorative film after the adjustment. |
