| 摘要 |
PROBLEM TO BE SOLVED: To drive a barrier opening/closing mechanism by the motive power of a zoom motor while realizing the reduction of cost and the miniaturization of a camera by providing a zoom gear train with a planet gear mechanism constituted so that the motive power of the zoom motor can be switchably transmitted to a zoom mechanism and the barrier opening/closing mechanism. SOLUTION: The zoom motor 18 is driven to be normally rotated, a sun gear 2802 is driven to be rotated through a 1st gear train 22A, and an arm 2806 is integrally rocked with a planet gear 2808. A gear train 34 is driven integrally with the rocking of the arm 2806 through a 1st gear 3401, and an arm for opening/closing a barrier 36 is rocked integrally with a 5th gear 3405 so as to move the barrier 26 to an opening position. The motor 18 is continued to be driven, the planet gear 2808 is meshed with a 6th gear 2206, and a 2nd gear train 22B is rotated to drive a zoom mechanism, so that a lens barrel is advanced from a housing position. The trailing end of a lock pin 32 is advanced with the advance of the lens barrel, and the leading end of the pin 32 is engaged with a notched part, whereby the arm 2806 can not be rocked.
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