Electric power tool
AssigneeMakita Corporation
InventorsAkifumi Tomita, Yusuke Hirata, Shingo Kamiya
Life of this patent
Estimating the term…
Abstract
An electric power tool has an electric motor disposed in a main body and a power supply circuit electrically connected to the electric motor by wires to supply electric power to the electric motor. A switch is disposed in the power supply circuit so as to electrically open and close the power supply circuit. A movable member is supported by the main body, a detector is disposed in the main body to detect a movement of the movable member and the switch is configured to electrically open the power supply circuit when the detector detects the movement of the movable member. The wires connected to the electric motor are not connected to the detector so that the length of the wires is shortened.
Claims15
An electric power tool comprising:
- a tool;
- a main body supporting the tool;
- an electric motor disposed in the main body and configured to drive the tool;
- a trigger supported by the main body and configured to be manually activated and deactivated by an operator;
- a power supply circuit electrically connected to the electric motor and configured to supply electric power to the electric motor;
- a movable member including a shaft supported by the main body and configured to rotate with respect to the main body around the shaft;
- a detector disposed in the main body and configured to detect a rotational movement of the movable member;
- a first switch disposed in the power supply circuit to electrically open and close the power supply circuit;
- and
- a controller electrically connected to the first switch and the detector and configured to control the first switch to:
- (i) electrically close the power supply circuit when the trigger is activated, (ii) electrically open the power supply circuit when the trigger is deactivated, and (iii) electrically open the power supply circuit when the detector detects the movement of the movable member while the trigger is activated.
Dependencies are inferred from the claim text.