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Light guide, lighting device, and image reading device

A technology for lighting devices and light guides, applied in image communication, electrical components, etc., can solve problems such as difficulty in obtaining light quantity, light leakage, etc.

Active Publication Date: 2018-04-10
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, if a protrusion is provided on the light guide, part of the light traveling through the light guide leaks to the outside through the protrusion.
As a result, in the lighting device described in Patent Document 1, it is difficult to obtain a sufficient amount of light

Method used

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  • Light guide, lighting device, and image reading device
  • Light guide, lighting device, and image reading device
  • Light guide, lighting device, and image reading device

Examples

Experimental program
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Embodiment Construction

[0039] Next, an illumination device and an image reading device having a light guide according to an embodiment of the present invention will be described.

[0040] (Structure of image reading device)

[0041] figure 1 It is a configuration diagram of the image reading device 10 including the illumination device 27 according to one embodiment of the present invention. In the following, the vertical direction is defined as the z-axis, and the moving direction of the slide units 18 and 20 (that is, the sub-scanning direction) is defined as the x-axis. A direction perpendicular to the x-axis and the z-axis (that is, the main scanning direction) is defined as the y-axis. The x-axis, y-axis, and z-axis are orthogonal to each other.

[0042] like figure 1 As shown, the image reading device 10 has a main body 12 , a platen glass 16 , slide units 18 and 20 , an imaging lens 22 , and an imaging element 24 .

[0043] The main body 12 is a rectangular parallelepiped casing provided ...

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PUM

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Abstract

The present invention provides a light guide, a lighting device, and an image reading device capable of irradiating a large amount of light. The light guide is characterized in that it has: a plurality of first fixing parts for fixing the first light guide part to the base member and arranged along the first direction on the first light guide part; and a plurality of second fixing parts. The fixing part is used to fix the second light guide part to the base member and is arranged on the second light guide part along the first direction; the plurality of first fixing parts and the plurality of second fixing parts are arranged in the first direction. Alternate upward configuration.

Description

technical field [0001] The present invention relates to a light guide, an illuminating device used in an image reading device for irradiating a document with light to read image information, and an image reading device having the above light guide and illuminating device. Background technique [0002] As an invention related to a conventional light guide, for example, an illuminating device described in Patent Document 1 is known. on the light guide bracket. [0003] However, in the lighting device described in Patent Document 1, in order to suppress bending of the two light guides due to changes in the ambient temperature, the side surfaces of the two light guides extend substantially over the entire lengths of the two light guides. Protrusions are provided. The protrusion is held by the light guide holder. Thus, it is possible to suppress the occurrence of bending in the two light guides. [0004] However, if a protrusion is provided on the light guide, part of the lig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N1/028
CPCH04N1/02815H04N1/02825H04N1/0283H04N1/02835H04N2201/02431H04N2201/02433H04N2201/02435
Inventor 板垣洋一田中聪子
Owner KONICA MINOLTA INC