| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure of motor with a built-in rotor that can prevent dirt in the outside from entering into the interior of motor or dropping on an image sensor attached in the interior of motor, can keep cleanliness of the image sensor, and can enhance the quality of images to be formed. SOLUTION: The structure of motor with a built-in rotor includes a lens set, and a motor that drives the lens set so as to telescopically move. Respective thread portions are formed on the motor and the lens set, and the motor drives so as to cause the lens set to move by an action of the thread portions that are screwed together. The structure of motor with a built-in rotor further includes a cover provided on the lens set, and an opening is provided in the center of the cover, the lens set including an upper end, and a lower end where the thread portions are provided. When the motor is driven so as to allow the upper end of the lens set to telescopically move from the opening of the cover, thread portions at the lower end of the lens set are hidden within the cover. COPYRIGHT: (C)2008,JPO&INPIT
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