JPH0358640U

JPH0358640U -

Info

Publication number: JPH0358640U
Application number: JP10141790U
Authority: JP
Priority date: 1990-09-27
Filing date: 1990-09-27
Publication date: 1991-06-07
Anticipated expiration: 1997-12-13
Also published as: JPH075480Y2

Description

[Brief explanation of the drawing]

第１図は従来の画像形成装置における光学系装
置を示す説明図、第２図はこの考案の一実施例で
ある画像形成装置たとえば電子複写機を示す説明
図、第３図及び第４図は前記電子複写機における
露光装置を示す斜視図、並びに、第５図は焦点調
整装置を示すブロツク図である。１４……第２のミラー、１９……感光体、２０
……レンズ、４３……第１のマイクロスイツチ、
４４……ミラー移動モータ、４７……レンズ移動
モータ、４８……第２のマイクロスイツチ、４９
……演算制御装置、５０……メモリ。 FIG. 1 is an explanatory diagram showing an optical system device in a conventional image forming apparatus, FIG. 2 is an explanatory diagram showing an image forming apparatus such as an electronic copying machine which is an embodiment of this invention, and FIGS. 3 and 4 are FIG. 5 is a perspective view showing an exposure device in the electronic copying machine, and a block diagram showing a focus adjustment device. 14... Second mirror, 19... Photoreceptor, 20
...lens, 43...first micro switch,
44... Mirror moving motor, 47... Lens moving motor, 48... Second micro switch, 49
... Arithmetic control unit, 50 ... Memory.

Claims

[Claims for Utility Model Registration] An optical system for forming a document image from a document onto an image carrier through a mirror and a lens, an adjustment state for adjusting the initial position of the optical system, and an adjustment state for adjusting the initial position of the optical system, and In an image forming apparatus in which the state of image formation on an image carrier can be independently set, when the image forming apparatus is in the adjustment state, the first optical path length from the document to the lens, and the first optical path length from the lens to the The position of at least one of the mirror and the lens is changed to change the ratio to the second optical path length up to the image carrier, and the optical system forms an image of the document on the image carrier in an appropriate state. a setting means for setting a specific position; a detection means for detecting that the mirror and the lens are at a reference position; when the image forming apparatus is in an image forming state;
Depending on the setting state by the setting means, the mirror and the lens are moved from a reference position detected by the detection means to the specific position so that the specific position of the mirror and the lens is the initial position at the time of image formation. Calculate the amount of movement required to move,
A control means for outputting a control signal according to the amount of movement; and a moving means for moving the mirror and the lens from the reference position to the specific position in accordance with the control signal output from the control means. Features of the image forming device.