| 摘要 |
It is an object to provide a novel technique for releasing an intervening member of a driving member. A representative screwdriver is provided with a motor and a driving mechanism. The driving mechanism has a spindle, a lock sleeve, rollers, a driving gear, a retainer and a spring receiver. When driven with the rollers held between the lock sleeve and the driving gear, the spindle is rotated in a normal direction. The lock sleeve has an inclined part and the retainer has an inclined part. The lock sleeve and the retainer move with respect to each other in the axial direction and the circumferential direction by sliding contact between the inclined parts. This relative movement in the circumferential direction is utilized to release the holding of the rollers. |
| 主权项 |
1. A power tool, which performs a prescribed operation by rotationally driving a tool accessory detachably coupled to a front end region, comprising:
a motor, and a driving mechanism that is driven by the motor and rotationally drives the tool accessory, the driving mechanism including: a tool accessory driving shaft to which the tool accessory is coupled, a driving member that is coaxially disposed with the tool accessory driving shaft and rotationally driven by the motor, and an intervening member that is disposed between the tool accessory driving shaft and the driving member and transmits rotation of the driving member to the tool accessory driving shaft when held between the tool accessory driving shaft and the driving member, while interrupting the transmission of rotation of the driving member to the tool accessory driving shaft when released from the holding, and a releasing mechanism that is driven by the motor and releases the holding. |
