| 摘要 |
PROBLEM TO BE SOLVED: To drive a photographing lens, a sector and the like on the respective optimum conditions thereof by a single motor. SOLUTION: A 1st motor gear 7 and a 2nd motor gear 8 are fixed to the motor shaft 1 of the stepping motor M which can be normally and reversely rotated. The photographing lens is driven by the gear 7 through a 1st transmission gear 9, a 1st driving ring 11 and a focusing ring 12. Besides, the sector is driven by the gear 8 through a 2nd transmission gear 12, a 2nd driving ring 15 and a sector ring 16. Then, the reduction ratios of respective transmission system columns are set to be different so that the conditions for driving the photographing lens and the sector become optimal.
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