JPS6189840U

JPS6189840U -

Info

Publication number: JPS6189840U
Application number: JP17498584U
Authority: JP
Priority date: 1984-11-20
Filing date: 1984-11-20
Publication date: 1986-06-11

Description

[Brief explanation of drawings]

第１図は本考案のクレーム対応図、第２図は本
考案に係る実施例の複写機内部概略説明図、第３
図は本実施例の変倍機構を示す側面図（曲面カム
を除く）、第４図はその縦断面図、第５図は本実
施例の曲面カムを示す斜視図である。１…スリツト露光プラテン移動型乾式電子写真
複写機、２…ケーシング、３…プラテンガラス、
４…プラテンカバー、５…原稿、６…露光ランプ
、７…第１ミラー、８…第２ミラー、９…第３ミ
ラー、１０…第４ミラー、１１…ズームレンズ、
１２…レンズマウント、１３…ドラム状感光体、
１４…帯電器、１５…現像器、１６…転写器、１
７…剥離器、１８…クリーニング器、１９…用紙
トレイ、２０…用紙、２１…給紙装置、２２…定
着器、２３…排紙装置、２４…排紙トレイ、３０
…距離調節鏡胴、３１…ズーム調節鏡胴、３２，
３３…レンズ移動シヤフト、３４，３５…プーリ
、３６…無端状ベルト、３７…ステツプピングモ
ータ、３８…曲面カム、３９…溝、４０…カムフ
オロワー、４１ａ，４１ｂ…固定部片、４２ａ，
４２ｂ…溝、４３…ねじ、４４…ワツシヤ。 Fig. 1 is a diagram corresponding to claims of the present invention, Fig. 2 is a schematic explanatory diagram of the inside of a copying machine according to an embodiment of the present invention, and Fig. 3 is a diagram corresponding to claims of the present invention.
The figure is a side view (excluding the curved cam) of the variable power mechanism of this embodiment, FIG. 4 is a longitudinal sectional view thereof, and FIG. 5 is a perspective view of the curved cam of this embodiment. 1... Slit exposure platen moving type dry electrophotographic copying machine, 2... Casing, 3... Platen glass,
4...Platen cover, 5...Original, 6...Exposure lamp, 7...First mirror, 8...Second mirror, 9...Third mirror, 10...Fourth mirror, 11...Zoom lens,
12... Lens mount, 13... Drum-shaped photoreceptor,
14...Charging device, 15...Developing device, 16...Transfer device, 1
7... Peeling device, 18... Cleaning device, 19... Paper tray, 20... Paper, 21... Paper feeding device, 22... Fixing device, 23... Paper ejection device, 24... Paper ejection tray, 30
...Distance adjustment lens barrel, 31...Zoom adjustment lens barrel, 32,
33... Lens moving shaft, 34, 35... Pulley, 36... Endless belt, 37... Stepping motor, 38... Curved cam, 39... Groove, 40... Cam follower, 41a, 41b... Fixed piece, 42a,
42b... Groove, 43... Screw, 44... Washer.

Claims

[Scope of utility model registration request]

In a variable copying magnification type copying machine using a zoom lens consisting of a distance adjusting lens barrel and a zoom adjusting lens barrel forming a threaded pair with the same distance adjusting lens barrel, the zoom lens is moved in the optical axis direction in accordance with the copying magnification. a zoom lens movement adjusting means for adjusting the position of the distance adjusting lens barrel; a cam follower provided protruding from the zoom adjusting lens barrel; and controlling the amount of rotation of the zoom adjusting lens barrel by regulating the movement of the cam follower. The curved cam is divided into multiple parts in the optical axis direction, each of which can be moved and fixed in the optical axis direction, and the focal length can be adjusted from the amount of movement of the zoom lens according to the copying magnification to the focal length according to the copying magnification. The shape is formed by rotating the zoom adjustment lens barrel by a predetermined amount in order to obtain the desired value, and by moving the divided parts, the shape can be slightly changed to absorb variations in the focal length of the zoom lens. A continuous variable magnification mechanism for copying machines.