Lighting device for vacuum cleaner

Abstract

The present invention aims to provide a lighting device for a vacuum cleaner capable of improving the visibility of the dust on the surface to be cleaned. A light guide plate (105) which guides light from light sources (108) at both ends towards the direction of advancing of a suction tool (100), and reflection surface grooves (107) having plural types of reflection surfaces formed on a reverse side of the light guide plate (105) are provided, thereby forming light rays radiating to a floor surface (111) from three directions and lighting the surface to be cleaned, i.e., the floor surface (111), in front of the suction tool (110) over a wide range, which makes shadows of the dust be easily recognized by sight and improves the visibility.

Description

technical field [0001] The present invention relates to a lighting device for a suction appliance for a vacuum cleaner. Background technique [0002] Conventionally, in the vacuum cleaner suction tool, in order to improve the visibility of the dust on the surface to be cleaned, a suction nozzle of the vacuum cleaner equipped with a lighting device has been proposed as the suction tool. [0003] That is, if Figure 8 As shown, the suction tool 202 of the existing vacuum cleaner has a suction port 203 on the bottom surface, and a pair of lighting devices 204 are arranged in a manner that the optical axes of each other are substantially parallel to each other and the ground is also substantially parallel to the front. The ground of the irradiation area 205 is illuminated. [0004] Patent Document 1: Japanese Utility Model Registration No. 3138321 [0005] However, in the above-mentioned conventional vacuum cleaner suction tool, there is still room for improvement from the vie...

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Problems solved by technology

[0005] However, in the suction tool of the above-mentioned existing vacuum cleaner, there is still room for improvement from the viewpoint of improving the visibility of dust on the surface to be cleaned.

[0006] That is, in the suction tool of the above-mentioned existing vacuum cleaner, the lighting device is arranged on the front surface of the suction tool in such a way that the optical axes of the pair of lighting devices are parallel to the ground and the optical axes of the pair of lighting devices are parallel to each other. On the surface to be cleaned in the vicinity of the central part of the front of the appliance, there is a large area that is not illuminated by the light irradiated from the pair of lighting devices, so that there is no way to pass through the pair of lighting devices that is not illuminated by the pair of lighting devices. Illumination by dust existing in the part illuminated by the irradiated light

Therefore, there is a problem that the user cannot reliably visually recognize the dust present at the portion not illuminated by the light irradiated from the pair of lighting devices.

In addition, the shadow of the dust formed by the light irradiated from the pair of lighting devices is short and difficult for the user to find, so the dust may remain.

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