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Optical scanning apparatus and image forming apparatus including the same

A technology of optical scanning and optical box, applied in the direction of optics, optical components, instruments, etc., can solve the problem of increasing the size of imaging equipment, and achieve the effect of suppressing the increase in size

Active Publication Date: 2014-06-18
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the size of the optical scanning device and the imaging apparatus including the optical scanning device increases

Method used

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  • Optical scanning apparatus and image forming apparatus including the same
  • Optical scanning apparatus and image forming apparatus including the same
  • Optical scanning apparatus and image forming apparatus including the same

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0029] Overall structure of imaging device 100

[0030] The image forming apparatus 100 according to the present embodiment functions as a color laser printer. The overall structure of the imaging device 100 will be described. Figure 16 is a schematic sectional view of the imaging apparatus 100 . The image forming apparatus 100 mainly includes four photosensitive drums 80 (80a, 80b, 80c, and 80d) as photoreceptors, an optical scanning device S1, an intermediate transfer belt 90, a feed cassette 91, a fixing unit 95, and a secondary transfer roller 94 . Around the respective photosensitive drums 80 of the image forming apparatus 100 are arranged charging rollers 81 (81a, 81b, 81c, and 81d), developing rollers 82 (82a, 82b, 82c, and 82d), and primary transfer rollers 83 (83a, 83b, 83c and 83d), which serve as processing units for processing the photosensitive drum 80.

[0031] An optical scanning device S1 serving as an exposure unit is arranged below the photosensitive dru...

no. 2 example

[0083] A second embodiment will now be described. Components similar to those of the first embodiment are denoted by the same reference numerals, and thus descriptions thereof are omitted.

[0084] Figure 13A is a perspective view of the optical box 109. While four light source units 21 are positioned relative to a single optical box 9 in the first embodiment, two light source units 21 ( 21A and 21B) are positioned relative to the optical box 109 in the second embodiment. Therefore, only one optical scanning system is supported on one side of the rotating polygon mirror 5 in the optical box 109 . Figure 13B The surrounding areas of the contact portions 31A, 31B, 32A, 32B, 51A, 51B, 52A, and 52B of the optical box 109 viewed from the optical axis direction are shown. When the two light source units 21A and 21B are positioned by a single optical box 109 , an effect similar to that of the first embodiment can be obtained by forming the abutment portions 31A to 52B on the pos...

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PUM

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Abstract

The invention relates to an optical scanning apparatus and a method for manufacturing an optical box. The optical scanning apparatus includes first and second light source units including respective light sources; a rotating polygon mirror that performs deflection scanning of laser beams emitted from the light sources included in the first and second light source units; and a positioning member including a first abutting portion on which the first light source unit abuts and a second abutting portion on which the second light source unit abuts, the positioning member positioning the first and second light source units. The first and second light source units are positioned by the positioning member and arranged next to each other in a rotation axis direction of the rotating polygon mirror. The positioning member is a single member disposed between the first and second light source units in the rotation axis direction.

Description

technical field [0001] The present invention relates to an optical scanning device included in an electrophotographic image forming apparatus such as a laser printer or a digital copier. Background technique [0002] One example of an optical scanning device included in an electrophotographic image forming apparatus is configured such that a plurality of light source units are supported in an optical box. Japanese Patent Laid-Open No. 2008-268239 discloses a method of positioning and fixing a light source unit when arranging the light source unit in the direction of the rotation axis of a rotating polygon mirror. Figure 14 It is a perspective view of a part of the optical scanning device disclosed in Japanese Patent Laid-Open No. 2008-268239. Such as Figure 14 As shown, a tunnel-shaped hollow area in which a plurality of light source units 71K and 71M are arranged close to each other in the Z direction (rotation axis direction) is formed in the side surface of the optical ...

Claims

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Application Information

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IPC IPC(8): G02B26/12
Inventor 室谷拓丹羽邦博阿左见纯弥西口哲也小林久伦
Owner CANON KK
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