JPS649255U

JPS649255U -

Info

Publication number: JPS649255U
Application number: JP10186387U
Authority: JP
Priority date: 1987-07-03
Filing date: 1987-07-03
Publication date: 1989-01-18

Description

[Brief explanation of the drawing]

第１図は本考案のミラーの支持構造を示す斜視
図、第２図および第３図は、それぞれ本考案の第
２図に示される保持用ブラケツトにより感光体ド
ラムに影響される不用光の状態の説明図、第４図
は本考案の保持用ブラケツトの別の実施例の斜視
図、第５図は第４図に対応する不用光の状態の説
明図、第６図および第７図は、それぞれ本考案の
保持用ブラケツトの他の構成を示す斜視図、第８
図は本考案が適用される複写機の説明図、第９図
は感光体ドラムの画像領域に対する画像情報の照
射の状態を示すグラフ、第１０図は従来例の装置
におけるミラーの支持構造を示す斜視図、第１１
図は第１０図の場合の保持用ブラケツトに反射さ
れる光の状態を示す説明図である。図中の符号、１……複写機、１１……プラテン
、１５……レンズ、２０……ミラー、２２……保
持用ブラケツト、２３……孔、２４……スプリン
グ、２５……遮光板、２７……低反射部材、２８
……照明側光規制部材、３０……感光体ドラム、
３１……画像領域、Ｌｍ……不用光。 FIG. 1 is a perspective view showing the mirror support structure of the present invention, and FIGS. 2 and 3 show the state of unnecessary light affected by the photoreceptor drum by the holding bracket shown in FIG. 2 of the present invention, respectively. 4 is a perspective view of another embodiment of the holding bracket of the present invention, FIG. 5 is an explanatory view of the state of unnecessary light corresponding to FIG. 4, and FIGS. 6 and 7 are: FIG. 8 is a perspective view showing other configurations of the holding bracket of the present invention, respectively;
The figure is an explanatory diagram of a copying machine to which the present invention is applied, FIG. 9 is a graph showing the state of irradiation of image information onto the image area of the photoreceptor drum, and FIG. 10 is a diagram showing a mirror support structure in a conventional device. Perspective view, 11th
This figure is an explanatory diagram showing the state of light reflected by the holding bracket in the case of FIG. 10. Symbols in the figure: 1... Copying machine, 11... Platen, 15... Lens, 20... Mirror, 22... Holding bracket, 23... Hole, 24... Spring, 25... Light blocking plate, 27 ...Low reflective material, 28
...Illumination side light regulating member, 30...Photoreceptor drum,
31...Image area, Lm...Unwanted light.

Claims

[Claims for Utility Model Registration] (1) Image formation using a method in which a photoconductor drum is irradiated with a light image of a copy material through an optical system including a plurality of mirrors to form an electrostatic latent image on the photoconductor drum. In the apparatus, among the plurality of mirrors included in the optical system,
To prevent the light incident on the holding bracket of the mirror that ultimately reflects the light image and irradiates the photoreceptor drum from reflecting toward the image area of the photoreceptor drum. 1. An optical device such as a copying machine, characterized in that a means is provided for preventing unnecessary light from affecting an image area of a photoreceptor drum. (2) A holding bracket that supports the mirror is arranged at a predetermined angle with respect to the optical axis, and the light image reflected on the inner wall of the holding bracket is placed outside the image area of the photoreceptor drum. An optical device such as a copying machine according to claim 1, characterized in that the optical device is configured to be reflective. (3) A practical use characterized in that a light-shielding plate is arranged to protrude from the inner wall of a holding bracket that supports the mirror, and the light-shielding plate prevents the light image from being irradiated onto the photoreceptor drum. An optical device such as a copying machine according to claim 1 of the patent registration claim.