Patent ID: 9594204
Date: 2017-03-14
CPC Classifications: A47L,F21V,F21W,F21Y,G02B

Claim:
1. A lighting device for a vacuum cleaner, the vacuum cleaner performing cleaning while a suction tool having a suction port is moved, the suction port sucking dust into a lower surface facing a surface to be cleaned, the lighting device comprising: a light guide plate provided in the suction tool, the light guide plate extends in a direction crossing a moving direction of the suction tool and parallel to the surface to be cleaned, the light guide plate guiding light so as to be reflected thereinside and emitting the guided light from an emitting surface facing the moving direction; light sources provided in both ends of the light guide plate in the extending direction; and plural reflection surface grooves formed on a reverse surface of the light guide plate which is a surface opposite to the emitting surface, wherein the reflection surface grooves have reflection surfaces reflecting light from the light sources, light reflected on the reflection surfaces and emitted from the emitting surface radiates to the surface to be cleaned from plural directions, and angles made by the reflection surfaces of respective reflection surface grooves and the reverse surface differ from one another.