| 摘要 |
PURPOSE:To reduce the number of parts and the cost and to simplify assembling by forming a regulating part, which regulates the movement of a driving ring, and a pressing part, which presses the ring in the direction of the optical axis, in a turning barrel as one body. CONSTITUTION:A fixed pawl 2b which regulates the movement of a zoom gear 10 as the driving ring and a pressing pawl 2c which presses the gear 10 in the direction of the optical axis are formed with a resin together with a turning barrel 2 as one body and can be deformed elastically in directions of arrows B and B' and arrows C and C' respectively. The gear 10 is inserted and set easily from the right of the barrel 2, and its movement is regulated by the pawl 2b. In this state, the pressing pawl 2c presses always the gear 10, and therefore, the rotatory force of the gear 10 is transmitted to the barrel 2 by the frictional force between the gear 10 and the pawl 2c. Thus, parts which are provided independently of the barrel conventionally are formed together with the barrel as one body to reduce the number of parts and the cost, and assembling is simplified. |
