Power Tool

摘要

A power tool includes: a rechargeable battery; a motor; a drive circuit; an operation unit; a battery state detection circuit; a control circuit; and an interruption circuit. The battery state detection circuit detects a battery voltage, and when the detected battery voltage is lower than or equal to a prescribed voltage, the battery state detection circuit outputs a low-voltage signal. The control means outputs a control signal to the drive circuit instructing to drive the motor when the operation unit is operated and halts the output of the control signal to the drive circuit instructing to halt driving the motor in response to the low-voltage signal. The interruption circuit outputs an interruption signal to the drive circuit in response to the low-voltage signal to thereby interrupt the drive circuit and halt driving the motor irrespective of whether or not the control signal is outputted to the drive circuit.

主权项

1. A power tool comprising:
a rechargeable battery; a motor; a drive unit configured to drive the motor; an operation unit that is operated by an operator; a battery status detector configured to detect a battery status, wherein when the detected battery status indicates that further discharge from the rechargeable battery should be prohibited, the battery status detector is configured to output an alert signal, wherein both a hardware solution and a software solution are employed in duplicate to assure prohibition of further discharge from the rechargeable battery in response to the alert signal.