公开(公告)号：US20230366535A1

公开(公告)日：2023-11-16

申请号：US18295868

申请日：2023-04-05

Applicant: MAKITA CORPORATION

Inventor： Makoto CHIKARAISHI ,  Akihiro HOZUMI ,  Yutaka OGISO

IPC: B23Q17/24 ,  B25F5/00 ,  B25B21/02 ,  B25B23/18 ,  F21V33/00 ,  F21V19/00 ,  F21V23/04 ,  H05B47/155 ,  H05B47/105

CPC classification number: B23Q17/2404 ,  B25F5/001 ,  B25B21/02 ,  B25B23/18 ,  F21V33/0084 ,  F21V19/0015 ,  F21V23/0414 ,  H05B47/155 ,  H05B47/105

Abstract: A power tool includes a motor, an output shaft, a chip-on-board light emitting diode, and a light cover. The output shaft is rotated by a rotational force of the motor. The chip-on-board light emitting diode is disposed around the output shaft. The chip-on-board light emitting diode includes: a substrate having a circular ring portion; and an LED chip disposed on a front surface of the circular ring portion. The light cover is fixed to the substrate. The light cover includes: 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. The inner cylindrical portion includes a cover slope that totally reflects light from the LED chip forward.

公开(公告)号：US20240175571A1

公开(公告)日：2024-05-30

申请号：US18435320

申请日：2024-02-07

Applicant: MAKITA CORPORATION

Inventor： Makoto CHIKARAISHI ,  Akihiro HOZUMI ,  Yutaka OGISO

IPC: F21V33/00 ,  B25B21/02 ,  B25B23/18 ,  B25F5/00 ,  H05B47/105 ,  H05B47/155

CPC classification number: F21V33/0084 ,  B25B21/02 ,  B25B23/18 ,  B25F5/001 ,  H05B47/105 ,  H05B47/155

Abstract: A power tool includes a motor, an output shaft, a chip-on-board light emitting diode, and a light cover. The output shaft is rotated by a rotational force of the motor. The chip-on-board light emitting diode is disposed around the output shaft. The chip-on-board light emitting diode includes: a substrate having a circular ring portion; and an LED chip disposed on a front surface of the circular ring portion. The light cover is fixed to the substrate. The light cover includes: 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. The inner cylindrical portion includes a cover slope that totally reflects light from the LED chip forward.

公开(公告)号：US20240123585A1

公开(公告)日：2024-04-18

申请号：US18239959

申请日：2023-08-30

Applicant: MAKITA CORPORATION

Inventor： Yutaka OGISO ,  Makoto CHIKARAISHI

IPC: B25B23/18

CPC classification number: B25B23/18 ,  B25B21/02

Abstract: A light unit is less likely to have lower light emission performance upon receiving a shock. An electric work machine includes a motor, a housing including a motor compartment accommodating the motor and a grip protruding downward from the motor compartment, an output unit located frontward from the motor and operable with a rotational force from the motor, a substrate extending above, on a left, and on a right of the output unit, and a plurality of light emitters mounted on a front surface of the substrate at intervals in a circumferential direction of the output unit. A light emitter of the plurality of light emitters nearest an apex of the substrate immediately above the output unit is at a position shifted circumferentially by a predetermined angle from the apex.