| 摘要 |
An electric power tool (1) includes a motor (18,25,56,79,93) as a driving source, a first operation switch (11,31,51), a first semiconductor switch (Q1), and a second semiconductor switch (Q2,Q20,Q30). The first operation switch is operated by a user to be turned ON/OFF. The first semiconductor switch, provided on a current path from the power source (7,41,52,87,92) to the motor, includes at least one semiconductor switching device. When the first operation switch is OFF, the first semiconductor switch is turned OFF to interrupt the current path. When the first operation switch is ON, the first semiconductor switch is turned ON to close the current path. The second semiconductor switch is provided on the current path in series with the first semiconductor switch and includes at least one semiconductor switching device. The second semiconductor switch closes/interrupts the current path by being turned ON/OFF in accordance with an input control signal. |
