| 摘要 |
PURPOSE:To prevent the adverse influence of flash at the time of molding when the mount for optical apparatus is molded of plastics by providing a sliding surface which is recessed in the regions of the die parting lines of dies at the time of molding. CONSTITUTION:The lens mount 1 molded of the plastic has the plural die parting lines 1c. The die parting lines 1c are positioned in the regions of all the recessed parts 1b. In other words, the recessed parts 1b are formed on the sliding surface 1a where the die parting lines 1c are generated so that the die parting lines 1c exist in the positions recessed from a reference plane 1a. Thus, the adverse influence of the flash generated in the die parting line position is eliminated and simultaneously the adverse influence of foreign mater, such as dust, is eliminated. |
