Power tool
AssigneeKoki Holdings Co., Ltd.
InventorsSatoshi Yamaguchi, Yoshikazu Kawano, Kazuhiko Funabashi
Life of this patent
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Abstract
A power tool which brakes a motor without turning off a trigger switch when a trouble occurs in the motor is provided. The power tool (10) comprises: a motor (20) that rotates by supply of electricity from a power source (PS); a controller (38) for controlling the rotation of the motor; a switch (12) for switching on and off of power supply from the power source to the motor manually; first braking means (23) for braking the motor when the switch (12) is switched from on to off; and second braking means (23, 45) for braking the motor (20) on the basis of a prescribed signal from the controller when the switch (12) is in an on state.
Claims10
A power tool comprising:
- a motor accommodated in a housing, the motor rotating with electric power supplied from a power source;
- a control circuit configured to control rotation of the motor;
- a switch configured to be manually switched between on and off of power supply from the power source to the motor;
- a first braking part configured to brake the motor when the switch is switched from on to off;
- and
- a second braking part configured to brake the motor on the basis of a predetermined signal from the control circuit when the switch is in an on state, wherein
- the first braking part comprises a first closed circuit formed when the switch is switched,
- the second braking part comprises a second closed circuit generated by the control circuit, and
- the first closed circuit and the second closed circuit are provided at the control circuit.
Dependencies are inferred from the claim text.