Patent ID: 11940143
Assignee: MAKITA CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  B  H | IPC B  F  H

Claim 15:
16. A power tool comprising:
a motor;
an output shaft that is rotated by a rotational force of the motor;
a chip-on-board light emitting diode disposed around the output shaft, the chip-on-board light emitting diode including: a substrate having a circular ring portion; and an LED chip disposed on a front surface of the circular ring portion;
a light cover fixed to the substrate, the light cover including: an inner cylindrical portion disposed radially inside with respect to the circular ring portion; and a light transmission portion through which light emitted from the LED chip passes, wherein the inner cylindrical portion includes a cover slope that totally reflects light from the LED chip forward;
an illuminance sensor; and
an LED control circuit configured to control an irradiation state of light emitted from the chip-on-board light emitting diode based on a detection value of the illuminance sensor.