| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a push-on fix for locking an aiming screw which can be removed easily. SOLUTION: At the peripheral edge of the center circular hole of a sheet form disk main body 12, a leaf spring form of holding piece 16 to hold an aiming screw 20 is extension formed, and at the area corresponding to the holding piece 16 in the outer peripheral edge of the disk main body 12, a leaf spring form of peripheral wall (aiming screw lock releasing claw) 18 for circular hole expanding operation is expansion formed, and this push-on fix for locking the aiming screw is provided between the peripheral edge of an aiming screw insert hole 1a and the neck of the aiming screw 20, and it holds the aiming screw 20 by preventing its removal. At the peripheral wall nonforming area in the outer peripheral edge of the disk main body 12, a cutting 19 to facilitate the elastic deformation of the holding piece 16 in the outer side in the radius direction when the circular hole 14 is expanded by expanding the peripheral wall 18 to the outer side in the radius direction, is provided.</p> |
