Light scanning device and image forming apparatus

An optical scanning device and deflection scanning technology, which is applied in the field of optical scanning devices and image forming devices, can solve the problems of reduced scanning accuracy of light beams, bending of the first imaging lens, and reduced optical performance of the first imaging lens, and achieve the goal of improving scanning accuracy Effect

Active Publication Date: 2016-12-07
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the existing optical scanning device, there is the following problem: when the ambient temperature changes, due to the difference in the linear expansion coefficient between the lower imaging lens (hereinafter referred to as the fi

Method used

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  • Light scanning device and image forming apparatus
  • Light scanning device and image forming apparatus
  • Light scanning device and image forming apparatus

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0020] "Implementation Mode One"

[0021] figure 1 It is a schematic configuration diagram showing the image forming apparatus 1 in the embodiment. The image forming apparatus 1 is a color printer of a tandem system, and includes an image forming unit 3 in a box-shaped housing 2. The image forming unit 3 transfers and forms an image on the recording paper P based on image data transmitted from an external device such as a computer connected to a network. Below the image forming section 3, an optical scanning device 4 for irradiating a light beam (laser) is arranged, and above the image forming section 3, a transfer belt 5 is arranged. Below the optical scanning device 4, a paper storage section 6 for storing recording paper P is arranged, and on the side of the paper storage section 6, a manual paper feed section 7 is arranged. On the upper side of the transfer belt 5, a fixing section 8 that performs a fixing process on the image transferred and formed on the recording paper P...

Example Embodiment

[0036] "Implementation Mode Two"

[0037] Figure 5 The second embodiment is shown. In this embodiment, the bonding area of ​​each upper bonding portion 52 and the lower imaging lens 42a is different from that of the first embodiment. In addition, the structure of this embodiment is the same as that of the first embodiment except for this point. In the following embodiments, the same components as those in the first embodiment are given the same reference numerals, and detailed descriptions thereof are omitted.

[0038] That is, in the present embodiment, the bonding area of ​​each upper bonding portion 52 and the lower imaging lens 42a is set to be larger than the bonding area of ​​each lower bonding portion 51 and the lower imaging lens 42a. Accordingly, it is possible to strengthen the adhesive force of the pair of upper adhesive portions 52 to the two imaging lenses 42a and 42b, thereby reliably suppressing the bending deformation of the lower imaging lens 42a caused by the e...

Example Embodiment

[0039] "Implementation Mode Three"

[0040] Image 6 The third embodiment is shown. In this embodiment, the lower adhesive portion 51 is more easily deformed in the main scanning direction than the upper adhesive portion 52, which is different from the above-described embodiments. In addition, the structure of this embodiment is the same as that of the first embodiment except for this point.

[0041] That is, in this embodiment, the bonding area between each lower bonding portion 51 and the lower imaging lens 42a is equal to the bonding area between each upper bonding portion 52 and the lower imaging lens 42a, and the lower side The interval h2 between the imaging lens 42a and the bottom wall of the housing 44 is set to be sufficiently larger (for example, twice or more) than the interval h1 between the lower imaging lens 42a and the upper imaging lens 42b. Accordingly, the lower adhesive portion 51 is more easily deformed than the upper adhesive portion 52 in the main scanning d...

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PUM

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Abstract

The invention provides a light scanning device and an image forming apparatus. The light scanning device includes a first imaging lens, and a second imaging lens. The first imaging lens has a bottom surface adhesively secured to a housing via a plurality of adhesion portions. The second imaging lens has a bottom surface adhesively secured to a top surface of the first imaging lens via a plurality of adhesion portions. The plurality of the adhesion portions interposed between the first imaging lens and the housing are symmetrically located with respect to a center position of the first imaging lens in a main-scanning direction. The adhesion portions interposed between the first imaging lens and the second imaging lens are symmetrically located with respect to the center position of the first imaging lens in the main-scanning direction, and are located outside in the main-scanning direction with respect to the adhesion portions between the first imaging lens and the housing. According to the invention, the first lens is prevented from being deformed due to the different linear expansion coefficients of the first imaging lens and the housing when the environmental temperature changes.

Description

technical field [0001] The present invention relates to an optical scanning device and an image forming apparatus including the optical scanning device. Background technique [0002] Conventionally, there is known an optical scanning device in which imaging lenses are stacked in multiple stages on the bottom wall of a housing. This optical scanning device includes: a light source unit that emits a plurality of light beams; and a deflection unit that deflects and scans the plurality of light beams emitted from the light source unit along a main scanning direction. The plurality of light beams deflected and scanned by the deflection unit are imaged on the scanned surface through their corresponding imaging lenses. [0003] An example in which imaging lenses are stacked in two stages above and below is proposed. [0004] The two imaging lenses have the same shape, and three cylindrical protrusions are formed on the lower surface of each imaging lens. Adhesive portions made o...

Claims

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Application Information

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IPC IPC(8): G03G15/04
CPCG02B26/125G02B7/025G02B7/028G02B26/123G03G15/04072H04N1/06H04N1/113G03G15/04036G03G15/04045G03G15/0435
Inventor 中野一成
Owner KYOCERA DOCUMENT SOLUTIONS INC
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