| 摘要 |
The inventions relates to a power hand tool having a rotational shaft driven by a driving unit, wherein the hand tool comprises a sensor for detecting a movement of a housing, a speed control unit for controlling the speed of the rotational shaft and a protection circuit set up to control the speed control unit for protecting a user of the hand tool based on the detected movement, wherein the protection circuit is set up to decrease the speed of the rotational shaft (preferably via the speed control unit) by a variable amount to different speed levels above zero, wherein the variable amount is depending on the amount of the detected movement. The invention further relates to an according method and to a battery for such a hand tool. |
