| 摘要 |
<p>PURPOSE:To minimize the number of the parts and to securely load the trigger of one reciprocating operation of the operation button by installing one pair or more with the lock position of two defective tooth parts as a pair, by corresponding to two positions of the operation rod and by using the rotation force of the motor for shifting two defective tooth parts. CONSTITUTION:When an operation button 27 is pushed in, a protrusion 28a of an operation rod 28 and an engagement of an engaged protrusion 24b are disengaged, a cam gear 21 is rotated slightly in the counterclockwise direction by means of the energizing force of a spring 26, a tooth part 22a is meshed with a drive gear 20 and the rotation force is transmitted. When the operation button 27 continues to be pushed, the meshing of the tooth part 22a of the cam gear 21 and the drive gear 20 is ended, the protrusion 28a is engaged with an engaged protrusion 24c and the further rotation is rejected. When the operation button 27 is returned from the above condition, the engagement between the protrusion 28a and the engaged protrusion 24c is released, the cam gear 21 is rotated by means of the meshing of a drive gear 20 with the tooth part 22b of the cam gear 21 and the rotation is ended at the position where the engaged protrusion 24a and the protrusion 28a are engaged.</p> |
