| 摘要 |
PURPOSE:To enable easy coupling between a driver bitt and a screw by forming an internal space in a driven clutch part for fixing a coupling pin as projected into said space and providing, on the other hand, a pin on a clutch shaft. CONSTITUTION:A driven clutch part 32 is so provided on the lower part of a driving clutch as to be freely rotatable. A clutch shaft 29 is inserted in the driven clutch part 32 and that a spring 33 is fitted between the shaft 29 and the driving clutch part 30. Also, the driven clutch part 32 has a hollow part and a coupling pin 34 is so provided as to be projected thereto. This coupling pin 34 has a semi-spherical part on the end thereof and gears with a pin 35 on the clutch shaft 29, thereby always transmitting the rotation of the clutch shaft 29 to the driven clutch part 32. Furthermore, a connecting mechanism is connected to the driven clutch part 32 and the rotation of a motor is transmitted to a driver bitt.
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