| 摘要 |
PROBLEM TO BE SOLVED: To provide a reflector movable type head lump facilitating molding of a screw insertion hole, and smoothly and easily inserting an aiming screw into the screw insertion hole without using a push-on fixture. SOLUTION: The aiming screw 30 wherein the screw insertion hole 10a is structured by a cylindrical portion 50 and the whole body is formed by synthetic resin is provided with a supported portion 34 supported by the cylindrical portion 50, a male thread portion 32 in front of the supported portion 34, and a crown-shaped bevel gear 35 behind the supported portion 34. At a front end side of the supported portion 34, an elastic locking piece is formed, which is elastically deformed to pass through the screw insertion hole 10a and engaged with a front end of the cylindrical portion 50 to prevent the aiming screw 30 from coming off backward. At a rear end side of the supported portion 34, an elastic rib 35 is formed, which press-contacts with the rear end of the cylindrical portion 50 and positions and fixed the aiming screw 30. |
