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Fixing structure, lens block, image reading unit and image forming apparatus

A technology for image reading and fixing structures, applied in image communication, installation, electrical components, etc., can solve problems such as poor accuracy, unsatisfactory resource saving, and high cost of parts reuse

Inactive Publication Date: 2008-04-16
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the parts are fixed by an adhesive, the two cannot be separated and both the base part and the package must be discarded.
The most expensive part in the image reading unit is the circuit board with the photoelectric conversion element. Although this circuit board has normal functions, it must also be discarded due to poor positional accuracy between parts
These not only cause high cost, but also are not ideal from the viewpoint of saving resources.
And it has also become the reason for the high cost of parts reuse

Method used

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  • Fixing structure, lens block, image reading unit and image forming apparatus
  • Fixing structure, lens block, image reading unit and image forming apparatus
  • Fixing structure, lens block, image reading unit and image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0134] Figure 1 to Figure 7An image forming apparatus, an image reading unit, and a lens assembly of Embodiment 1 of the first embodiment of the present invention are shown.

[0135] Such as figure 1 As shown, the image forming apparatus 1 includes: an apparatus body 2 , an automatic document feeding device 3 , an image reading unit 4 , a paper feeding unit 5 , and a writing unit 6 .

[0136] The device main body 2 is formed in a box shape, for example, and is installed on the ground or the like. The device main body 2 accommodates an image reading unit 4 , a paper feeding unit 5 and a writing unit 6 .

[0137] An automatic document feeder 3 is installed on the upper portion of the device body 2 . The automatic document feeder 3 includes a document placement plate 7 and a belt feeder 8 . The document loading plate 7 is formed in a flat plate shape, is attached to the upper part of the apparatus main body 2, and places a plurality of documents 9 on the surface. The belt f...

Embodiment 2

[0180] Refer below Figure 8 A lens unit of Embodiment 2 of the first embodiment of the present invention is explained. The same reference numerals are used for the parts having the same structure as those of the first embodiment, and repeated explanations are omitted.

[0181] Such as Figure 8 As shown, the holes 49a, 49b are blocked by the thin-walled portion 52 in this embodiment. The thickness of the thin portion 52 is thinner than the thickness of the peripheral wall of the lens barrel 39 . The thin portion 52 is flush with the inner peripheral surface of the lens barrel 39 , and a concave portion is formed from the outer peripheral surface of the lens barrel 39 . Therefore, the thin portion 52 is broken by inserting a tool 51 such as a screwdriver into the holes 49a, 49b. In this way, the holes 49 a and 49 b that are not blocked by the thin portion 52 are formed in the lens barrel 39 .

[0182] Next, the procedure for taking out the lens 40 pressed into the lens ba...

Embodiment 3

[0185] Refer below Figure 9 ~ Figure 1 2 illustrates the lens assembly of Embodiment 3 of the first embodiment of the present invention. The same reference numerals are used for the parts having the same structure as those of the first embodiment, and repeated explanations are omitted.

[0186] In this embodiment, grooves 53 are provided instead of the holes 49a and 49b. The groove 53 is provided on both the large-diameter portion 39 a and the small-diameter portion 39 b, and extends parallel to (along) the optical axis O of the lens 40 . The groove 53 opens at the edge forming the openings of the large-diameter portion 39 a and the small-diameter portion 39 b, and is recessed from the inner peripheral surface of the lens barrel 39 . The groove 53 is provided throughout the first space A and the second space B of the lens barrel 39 , that is, the groove 53 communicates the first space A and the second space B with each other. Such as Figure 10 As shown, a plurality of gr...

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PUM

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Abstract

A lens block according to the present invention includes a lens cylinder; and at least one lens accommodated in the lens cylinder and dividing a space in the lens cylinder into a first space and a second space, wherein the lens cylinder includes at least one hole into which a tool for removing the at least one lens from the lens cylinder is inserted, wherein the at least one lens is pressed into the lens cylinder from either one of the first space and the second space, and the at least one hole is formed on the other of the first space and the second space, and wherein the at least one hole is provided in a position that enables the inserted tool to contact the at least one lens through the at least one hole.

Description

technical field [0001] The present invention relates to a fixing structure, a lens assembly, an image reading unit, and an image forming device used in copiers, facsimile machines, scanning devices, and the like. Background technique [0002] Conventionally, a lens assembly of an image reading unit used in copiers, facsimile machines, scanners, etc. includes: a base member; an imaging lens system mounted on the base member; an imaging sensor having a linear photoelectric conversion element and A package that accommodates the linear photoelectric conversion element is mounted on a base member. The lens assembly of the image reading unit moves the illumination light source of the original in the sub-scanning direction, and causes the reflected light from the original to be reduced and imaged on the line-type photoelectric conversion element through an imaging lens system composed of two or more lenses, The imaging light beam formed on the linear photoelectric conversion eleme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/02G02B26/12H04N1/028
Inventor 中嶋充金谷志生小林重勇藤田茂
Owner RICOH KK