JPH0335280A - Electrophotographic printer - Google Patents

Abstract

PURPOSE:To miniaturize a printer and to reduce cost by providing a reciprocating circuit mechanism rocking a sectorial photosensitive body part having dielectric body, centered around a turning shaft. CONSTITUTION:The photosensitive body part 1 having the dielectric body is shaped in an almost sector so that the position of the turning shaft 1a is a rivet, at its virtual cross-section and the turning mechanism rocking the photosensitive body part 1, centered around the turning shaft 1a, is provided. The dielectric photosensitive face of the photosensitive body part 1 electrified by a charger 2 is moved along a semi-circumference. Consequently, the part 1 is exposed by a printer head 3 to form a charge pattern, and developed with toner by a developing device 4. After the trandfer device 5 transfers it to a printing sheet 6, the part 1 is destaticized by an eraser 7 and cleaned by a cleaner 8. Thus, a small-sized and inexpensive printer is constituted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Minute Hand) The present invention relates to an electrophotographic printer, and more particularly to an electrophotographic printer in which the shape of the photoreceptor portion that forms the charge pattern on the dielectric material is improved.

(Prior art) Conventional printers of this type employ a cylindrical photoreceptor section that creates a charge pattern on a dielectric material, and rotate this photoreceptor drum so that it faces the rotating photoreceptor drum. Then, a charger, a printer, a developer, a transfer device, an eraser, a cleaner, etc. were installed to perform printing.

(Problems to be Solved by the Invention) The above-mentioned conventional electrophotographic printer has the disadvantage that since the photoreceptor portion is cylindrical, there is a limit to miniaturization of the device, and it is expensive.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate such drawbacks and provide an electrophotographic printer that is easy to miniaturize and is inexpensive.

(Means for Solving the Problems) In order to achieve the above object, the electrophotographic printer of the present invention creates a pattern of charges on a dielectric material, attaches toner to the pattern, and applies the toner to a printing paper 6. In a printer that transfers images onto a photoreceptor portion l having the dielectric material,
is a reciprocating circuit whose hypothetical cross section cut along a plane perpendicular to the rotation axis 1a is approximately fan-shaped with the pivot point at the rotation axis 1m, and which swings the photoreceptor part l around the rotation axis Ill. The structure shall have a moving mechanism.

(Example) Next, the present invention will be explained with reference to the drawings.

FIG. 1 is an explanatory diagram showing a main part of an embodiment of the present invention in a longitudinal sectional view.

As shown in FIG. 1, this embodiment includes a fan-shaped photoreceptor portion l whose pivot point is the position of the rotation axis 1a, and a rotating photoreceptor portion l.
A charger 2, a printer head 3, a developing device 4, a transfer device 5, an eraser 7, and a cleaner 8 are arranged on a semi-cylindrical surface at positions facing the .

By moving the photosensitive surface of the dielectric material of the photoreceptor portion l charged by the charger 2□ along a semicircle in a swing range indicated by an arrow 9, a charge pattern is created by exposure by the printer head 3. It is developed with toner by the developing device 4,
After being transferred onto printing paper 6 by a transfer device 5, the electricity is removed by an eraser 7 and cleaned by a cleaner 8.

The cleaned photoreceptor section 1 returns to its original position in the return direction of the arrow 9 and is charged again by the charger 2.

On the return path of the rotation of the photoreceptor portion l, transfer, development,
There will be no road lighting.

(Effects of the Invention) As explained above, the present invention has a structure in which a photoreceptor @O thick shape, which has conventionally been drum-shaped, is made into a fan-shaped cross section and is swung around the key position of the fan shape to perform printing. This has the effect that it is possible to provide a compact and low-cost printer.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram (longitudinal sectional view) showing a main part of an embodiment of the present invention. 1... Photoconductor 1a - Rotation shaft of photoconductor section 2... Charger 3 - Printer head 4 - Developing device 5... Transfer device 6 - Print paper 7 - Eraser 8 - Cleaner 9 -・Arrow indicating the swing range of the photoconductor part

Claims (1)

[Claims] In a printer that creates a pattern of charge on a dielectric material, attaches toner to the pattern, and transfers the toner onto printing paper, the photoreceptor section having the dielectric material is arranged in a plane perpendicular to its rotation axis. An electrophotographic printer characterized in that a cut virtual cross section is substantially fan-shaped with the position of the rotation axis as a key point, and the electrophotographic printer has a reciprocating rotation mechanism for swinging the photoreceptor part around the rotation axis.