JPH0267352U - - Google Patents
Info
- Publication number
- JPH0267352U JPH0267352U JP14636588U JP14636588U JPH0267352U JP H0267352 U JPH0267352 U JP H0267352U JP 14636588 U JP14636588 U JP 14636588U JP 14636588 U JP14636588 U JP 14636588U JP H0267352 U JPH0267352 U JP H0267352U
- Authority
- JP
- Japan
- Prior art keywords
- reflecting mirror
- holding member
- lens
- reflecting
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims description 3
- 108091008695 photoreceptors Proteins 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Optical Systems Of Projection Type Copiers (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Variable Magnification In Projection-Type Copying Machines (AREA)
Description
第１図は本発明実施例による露光装置の要部を
示す斜視図、第２図は第１図に示した要部の駆動
機構を示す斜視図、第３図は第１図中、符号で
示す方向の矢視図、第４図は第３図中、符号―
で示す方向の矢視断面図、第５図Ａは第２図中
、符号で示す箇所の詳細を示す斜視図、第５図
Ｂは第５図Ａ中、符号Ｂ―Ｂで示す方向の矢視断
面図、第６図は第２図に示した駆動機構の作用を
説明するための線図、第７図は第２図に示した駆
動機構の作用を説明するフローチヤート、第８図
は変倍露光装置を用いた画像形成装置の一例を説
明するための模型図、第９図は露光装置における
変倍時での光学部材の移動状態を説明するための
線図である。
１……複写機、２……感光体、４……露光装置
、４Ｃ……第１ミラー、４Ｄ……レンズ、１１…
…第１ミラー支持ユニツト、１１Ａ……第１ミラ
ー保持部、１１Ｂ……レンズ保持部、１１Ｂ１，
１１Ｂ２……ガイド軸、１２……レンズ保持部材
、１２Ｂ……カムフオロワ、１３……不動部、１
３Ａ……カム溝、１５……コグベルト、１６，１
７……ベルトプーリー、１８……ウオームホイー
ル、駆動モータ、２０……ウオームギヤ、３１…
…ホームセンサ、１１０……ボス部、１１０Ａ…
…係止歯、１２０……遮光板、１２１……凹凸部
。
FIG. 1 is a perspective view showing the main parts of an exposure apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view showing the drive mechanism of the main parts shown in FIG. 1, and FIG. The arrow view in the direction shown in Fig. 4 is indicated by the symbol - in Fig. 3.
5A is a perspective view showing the details of the parts indicated by the symbols in FIG. 2, and FIG. 5B is a sectional view taken in the direction indicated by the symbols BB in FIG. 6 is a diagram for explaining the operation of the drive mechanism shown in FIG. 2, FIG. 7 is a flowchart for explaining the operation of the drive mechanism shown in FIG. 2, and FIG. 8 is a diagram for explaining the operation of the drive mechanism shown in FIG. FIG. 9 is a schematic diagram illustrating an example of an image forming apparatus using a variable magnification exposure device, and FIG. 9 is a diagram illustrating a state of movement of an optical member during variable magnification in the exposure device. DESCRIPTION OF SYMBOLS 1... Copying machine, 2... Photoreceptor, 4... Exposure device, 4C... First mirror, 4D... Lens, 11...
...first mirror support unit, 11A...first mirror holding section, 11B...lens holding section, 11B1,
11B2... Guide shaft, 12... Lens holding member, 12B... Cam follower, 13... Fixed part, 1
3A...Cam groove, 15...Cog belt, 16,1
7... Belt pulley, 18... Worm wheel, drive motor, 20... Worm gear, 31...
...Home sensor, 110...Boss part, 110A...
... Locking tooth, 120 ... Light shielding plate, 121 ... Uneven part.
Claims (1)
反射鏡間に位置するレンズを介して感光体上に投
影するための光学部材を備え、変倍時には、これ
ら光学部材の位置を変位させることができる変倍
露光装置において、 上記複数の反射鏡のうち、原稿面からの反射光
を最初に反射する第１の反射鏡と、 上記第１の反射鏡を上記反射光の光軸方向に平
行する状態で移動可能に支持する第１反射鏡保持
部材と、 上記第１反射鏡保持部材の後方に位置するレン
ズを上記第１の反射鏡保持部材の移動量から得れ
る比率に応じた量を以つて第１反射鏡保持部材の
移動方向に移動させるレンズ保持部材と、 上記第１反射鏡およびレンズを共に、配置する
筐体で構成された第１反射鏡支持ユニツトとを備
え、 上記第１反射鏡支持ユニツトにおける上記レン
ズの配置箇所表面には、遮光用の凹凸部を形成し
たことを特徴とする画像形成装置における変倍露
光装置。[Claims for Utility Model Registration] It is equipped with an optical member for projecting the reflected light from the document surface onto a photoreceptor through a plurality of reflecting mirrors and a lens located between the reflecting mirrors. In a variable magnification exposure apparatus capable of displacing the position of a member, a first reflecting mirror that first reflects light reflected from a document surface among the plurality of reflecting mirrors; A first reflecting mirror holding member movably supported in a state parallel to the optical axis direction of the light, and a lens located behind the first reflecting mirror holding member are obtained from the movement amount of the first reflecting mirror holding member. a first reflecting mirror supporting unit comprising a lens holding member that moves the first reflecting mirror holding member in the movement direction by an amount corresponding to a ratio of the first reflecting mirror holding member; and a casing in which both the first reflecting mirror and the lens are arranged; A variable magnification exposure device for an image forming apparatus, characterized in that a light-shielding uneven portion is formed on a surface of the first reflecting mirror support unit where the lens is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988146365U JP2509339Y2 (en) | 1988-11-09 | 1988-11-09 | Variable magnification exposure device in image forming apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988146365U JP2509339Y2 (en) | 1988-11-09 | 1988-11-09 | Variable magnification exposure device in image forming apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0267352U true JPH0267352U (en) | 1990-05-22 |
| JP2509339Y2 JP2509339Y2 (en) | 1996-09-04 |
Family
ID=31415785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988146365U Expired - Lifetime JP2509339Y2 (en) | 1988-11-09 | 1988-11-09 | Variable magnification exposure device in image forming apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2509339Y2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5611084A (en) * | 1979-07-08 | 1981-02-04 | Hamanaka Kk | Handicraft blank set and doll preparing handicraft method which use said set |
| JPS6389831A (en) * | 1986-10-03 | 1988-04-20 | Sharp Corp | Lens unit |
| JPS63105133U (en) * | 1986-12-26 | 1988-07-07 |
-
1988
- 1988-11-09 JP JP1988146365U patent/JP2509339Y2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5611084A (en) * | 1979-07-08 | 1981-02-04 | Hamanaka Kk | Handicraft blank set and doll preparing handicraft method which use said set |
| JPS6389831A (en) * | 1986-10-03 | 1988-04-20 | Sharp Corp | Lens unit |
| JPS63105133U (en) * | 1986-12-26 | 1988-07-07 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2509339Y2 (en) | 1996-09-04 |
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