JPS6138632U

JPS6138632U - Copy machine magnification mechanism

Info

Publication number: JPS6138632U
Application number: JP12268184U
Authority: JP
Inventors: 進渡部
Original assignee: 富士ゼロックス株式会社
Priority date: 1984-08-10
Filing date: 1984-08-10
Publication date: 1986-03-11

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案変倍機構の一実施例を示す正面図、第２
図は複写機の光学系部分を示す図面、第３図は光学系に
おける物点、像点およびレンズの位置関係を示す区面、
第４図はミラー回動手段を示す図面、第５図はレンズ駆
動ケーブル上における各部材の配置位置関係を説明する
ための図面である。１・・・・・・複写機本体、２・・・・・・プラテンガ
ラス、３・・・・・・原稿、４・・・・・・照明ランプ
、５・・・・・・第１ミラー、６・・・・・・第２ミラ
ー、７・・・・・・第３ミラー、８・・・・・・レンズ
、９・・・・・・第４ミラー、１０・・・・・・ドラム
状感光体、１１・・・・・・第１走査部材、１２・・・
・・・第２走査部材、１ゴ・・・・・・光軸、１４・・
・・・・ミラー保持部材、１５・・・・・・カム（ミラ
ー回動手段）、１６・・・・・・カムフオロワ（ミラー
回動手段）、１７・・・・・・レンズ駆動ケーブル、１
８・・・・・・レンズマウント、１９・・・・・・レン
ズマウント案内軸、２０・・・・・・駆動モータ、２１
・・・・・・貫通孔、２２．２３・・・・・・球体、２
４・・・・・・反射光。Figure 1 is a front view showing one embodiment of the variable power mechanism of the present invention;
The figure is a diagram showing the optical system part of the copying machine, and Figure 3 is a section showing the positional relationship of the object point, image point, and lens in the optical system.
FIG. 4 is a drawing showing the mirror rotation means, and FIG. 5 is a drawing for explaining the arrangement positional relationship of each member on the lens drive cable. 1...Copy machine body, 2...Platen glass, 3...Original, 4...Illumination lamp, 5...First mirror , 6... Second mirror, 7... Third mirror, 8... Lens, 9... Fourth mirror, 10... Drum-shaped photoreceptor, 11...first scanning member, 12...
...Second scanning member, 1 go...Optical axis, 14...
... Mirror holding member, 15 ... Cam (mirror rotation means), 16 ... Cam follower (mirror rotation means), 17 ... Lens drive cable, 1
8... Lens mount, 19... Lens mount guide shaft, 20... Drive motor, 21
...Through hole, 22.23...Sphere, 2
4...Reflected light.

Claims

[Scope of utility model registration request]

An optical system for projecting an image of a document onto a drum-shaped photoreceptor is provided, and between a lens in the optical system and the drum-shaped photoreceptor, light from the lens is reflected and directed to the drum-shaped photoreceptor. In a copying machine with one mirror interposed, a mirror holding member that holds the one mirror and changes the conjugate length during zooming by moving parallel to the optical axis of the lens, and this mirror holding member and a mirror rotating means that rotates the mirror according to the movement of the mirror and always directs the reflected light of the mirror in a direction toward the center of the drum-shaped photoreceptor. A variable magnification mechanism for a copying machine, characterized in that the lens is moved during magnification by being driven by a cable with a large play, first determining the position of the mirror holding member, and then adjusting the lens position.