Electric working machine, illuminator attachment, and method of radiating light from electric working machine

Patent metadata

Field	Value
Publication number	US-11280488-B2
Application number	US-202117154090-A
Country	US
Kind code	B2
Filing date	Jan 21, 2021
Priority date	Jan 20, 2020
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

An electric working machine according to one aspect of the present disclosure includes a motor, a driving mechanism, a housing, a grip, a first light emitter, and a light guide. The first light emitter emits light. The light guide has a ring-shape. The light guide is extending along an outer circumference of the housing. The light guide includes a light entering surface receiving the light emitted from the first light emitter. While propagating the light entered from the light entering surface in the light guide, the light guide radiates the light from a surface of the light guide.

First claim

What is claimed is:

1. An electric working machine comprising:
a motor;
a driving mechanism configured to transmit rotational force of the motor to a tool;
a housing accommodating the motor and the driving mechanism therein;
a grip configured to be held by a user of the electric working machine;
a first light emitter configured to emit light;
a light guide (1) having a ring-shape, (2) extending along an outer circumference of the housing, (3) including a light entering surface configured to receive the light emitted from the first light emitter, and (4) being configured such that while propagating the light entering the light entering surface in the light guide, the light guide radiates the light from a surface of the light guide; and
a reflector configured to reflect the light radiated in a first direction from the light guide toward a second direction, the second direction being opposite the first direction.

2. The electric working machine according to claim 1 ,
wherein the light guide has a center axis, and
wherein the first direction and the second direction intersect with a first virtual plane orthogonal to the center axis.

3. The electric working machine according to claim 1 ,
wherein the reflector includes an annular member having a ring-shape, and
wherein the light guide is arranged so as to face the annular member.

4. The electric working machine according to claim 3 ,
wherein the annular member includes a groove arranged along a circumferential direction of the annular member, and
wherein the light guide is fitted into the groove.

5. The electric working machine according to claim 4 , further comprising
a cover having a ring-shape, the cover having a light transmittance of more than zero, the cover being detachably attached to the reflector so as to cover the light guide over a circumferential direction of the light guide.

6. The electric working machine according to claim 1 ,
wherein the first light emitter is provided to the reflector.

7. The electric working machine according to claim 6 ,
wherein the reflector is integrally molded with an insulating material.

8. The electric working machine according to claim 7 ,
wherein the insulating material contains resin.

9. The electric working machine according to claim 7 ,
wherein the reflector includes a first conductor trace integrally provided to a surface of the reflector, the first conductor trace being electrically coupled to the first light emitter.

10. The electric working machine according to claim 7 , further comprising
a second light emitter provided to the reflector, the second light emitter being configured to emit additional light.

11. The electric working machine according to claim 10 ,
wherein the reflector includes a second conductor trace provided to a surface of the reflector, the second conductor trace being electrically coupled to the second light emitter.

12. The electric working machine according to claim 1 further comprising
a second light emitter configured to emit additional light.

13. The electric working machine according to claim 12 ,
wherein an optical axis of the additional light intersects with a center axis of the light guide.

14. The electric working machine according to claim 1 , further comprising
an engaged portion,
wherein the reflector includes an engaging portion configured to be engaged with the engaged portion, and
wherein the reflector is detachably attached to the electric working machine by the engaging portion engaged with the engaged portion.

15. The electric working machine according to claim 1 ,
wherein the first light emitter includes a light emitting diode.

16. An electric working machine comprising:
a motor;
a driving mechanism configured to transmit rotational force of the motor to a tool;
a housing accommodating the motor and the driving mechanism therein;
a grip configured to be held by a user of the electric working machine;
a first light emitter configured to emit light, the first light emitter being provided to the housing; and
an illuminator attachment including a light guide, the illuminator attachment having a ring-shape and being configured to be detachably attached to the housing,
wherein the light guide (1) has a ring-shape, (2) extends along an outer circumference of the housing, (3) includes a light entering surface configured to receive the light emitted from the first light emitter, and (4) is configured such that while propagating the light entering the light entering surface in the light guide, the light guide radiates the light from a surface of the light guide.

17. The electric working machine according to claim 16 ,
wherein the illuminator attachment includes at least one support,
wherein the at least one support includes a supporting surface, and
wherein the supporting surface is configured to come in contact with a surface of the housing.

18. The electric working machine according to claim 17 ,
wherein the at least one support is configured to be elastically deformed by being pressed from the surface of the housing in response to the illuminator attachment being arranged at a specified position, and
wherein the illuminator attachment arranged at the specified position is configured to be attached to the housing by biasing force applied to the surface of the housing from the at least one support elastically deformed.

19. The electric working machine according to claim 17 ,
wherein the at least one support includes two or more supports arranged to be separated from each other along a circumferential direction of the illuminator attachment.

20. An electric working machine comprising:
a motor;
a driving mechanism configured to transmit rotational force of the motor to a tool;
a housing accommodating the motor and the driving mechanism therein;
a grip configured to be held by a user of the electric working machine;
a first light emitter configured to emit light,
the first light emitter being provided to the housing:
an attachment auxiliary part configured to be detachably attached to the housing; and
an illuminator attachment (1) configured to be detachably attached to the attachment auxiliary part, (2) having a ring-shape, and (3) including a light guide,
wherein the light guide (1) has a ring-shape, (2) extends along an outer circumference of the housing, (3) includes a light entering surface configured to receive the light emitted from the first light emitter, and (4) is configured such that while propagating the light entering the light entering surface in the light guide, the light guide radiates the light from a surface of the light guide.

21. An electric working machine comprising:
a motor;
a driving mechanism configured to transmit rotational force of the motor to a tool;
a housing accommodating the motor and the driving mechanism therein;
a grip configured to be held by a user of the electric working machine;
a first light emitter configured to emit light; and
a light guide (1) having a ring-shape, (2) extending along an outer circumference of the housing, (3) including a light entering surface configured to receive the light emitted from the first light emitter, (4) being configured such that while propagating the light entering the light entering surface in the light guide, the light guide radiates the light from a surface of the light guide, and (5)
having a center axis,
wherein a plane including the light entering surface intersects the center axis.

Assignees

• Makita Corp

Inventors

• Niwa Akira

Classifications

• B25B23/18 Primary

  Devices for illuminating the head of the screw or the nut · CPC title

• F21V13/045

  for portable lighting devices · CPC title

• F21V2200/20

  of light guides of a generally planar shape · CPC title

• B25B21/00

  Portable power-driven screw or nut setting or loosening tools; (details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00; {for mounting or dismounting wheels B60B29/006}); Attachments for drilling apparatus serving the same purpose (machines B23P19/06) · CPC title

• B25B21/02

  with means for imparting impact to screwdriver blade or nut socket · CPC title