CONSTRUCTION OF SCREW DRIVER ROTATION

摘要

PURPOSE:To enable to make fine adjustment for adjusting screws independently of more or less position shift of the adjusting screws. CONSTITUTION:A tip 22 of a screw driver shaft 40 is formed so that it fits to head groove shape of an adjusting screw 6a and the like. A sleeve 21 is inserted to the tip 22 freely slidably. A recess of taper shape toward inside is formed at the end in contact with the head of the adjusting screw 6a of the sleeve 21 so that it can contact with the head of the screw 6a on a circle or circumference. A spring 24 is contacted with another end of the sleeve 21 and the spring 24 is inserted to the external circumference of the driver shaft 40, and presses the sleeve 21 to the screw 6a. A shaft 26 is linked to the opposite side of the tip 22 of the drive shaft 40 via a spring joint 25. The shaft 26 is linked to a pulse motor and the like. Since the sprig joint 25 has a flexibility orthogonal to the shaft, even if the screw 6 has more or less position shift, the sleeve 21 can smoothly be fitted to the head of the screw 6a.