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

Claim 14:
15. 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: a light transmission portion through which light emitted from the LED chip passes, and an inner cylindrical portion disposed radially inside with respect to the circular ring portion, wherein
the light transmission portion includes a light entrance surface facing the LED chip and a light exit surface from which light emitted from the LED chip and incident on the light entrance surface is output, and
an uneven portion is formed on the light entrance surface; wherein
the inner cylindrical portion includes a cover slope that totally reflects light from the LED chip forward.