CN201156167Y

CN201156167Y - Developer roller and processing box

Info

Publication number: CN201156167Y
Application number: CNU2008200444943U
Authority: CN
Inventors: 白利民
Original assignee: Print Rite Technology Development Co Ltd of Zhuhai
Current assignee: Shanghai Agger Photosensitive Material Co Ltd
Priority date: 2008-02-28
Filing date: 2008-02-28
Publication date: 2008-11-26
Anticipated expiration: 2018-02-28

Abstract

The utility model relates to a developing roller and a processing box which are used by an electric-statically printed image-processing system. The developing roller comprises a drum, a magnetic core and a flange; wherein, the magnetic core is arranged in the drum; the flange is fixed on the end of the drum; the flange made of electric-conductive material is provided with a tubular spring bearing seat. The structure of the end of the developing roller is simplified, the original insulated resin flange is replaced by the flange made of electroconductive material, the structure of which is improved, and the improved flange is provided with the tubular spring bearing seat in order to introduce the voltage bias of the developing roller into the drum.

Description

Developing roller and processing box

Technical Field

The utility model relates to an improved developing roller and use this kind of developing roller's processing box.

Background

An electrophotographic image forming apparatus is a device that forms an image on a recording medium using an electrophotographic image forming method. Examples of the electrophotographic image forming apparatus include an electrophotographic copying machine, an electrophotographic printer, a facsimile machine, and the like.

Further, the process cartridge is a cartridge that combines at least the developing device and the electrophotographic photosensitive drum, and is detachably mounted on a main body of the electrophotographic image forming apparatus.

Currently, image forming apparatuses using an electrophotographic image forming method are widely used. The image forming apparatus performs image recording by: forming a latent image by light irradiation corresponding to an image signal on the electrophotographic photosensitive drum; feeding the developer to the electrophotographic photosensitive drum by rotation of the developer supporting member; a developing bias is applied to transfer the developer image onto the recording medium.

Such an electrophotographic image forming apparatus using the electrophotographic image forming method uses a process cartridge in which an electrophotographic photosensitive drum and a process means acting on the electrophotographic photosensitive drum are integrally formed in the process cartridge, and the process cartridge is detachably mounted in a main body of the electrophotographic image forming apparatus. Fig. 1 and 2 of the present application are respectively fig. 2 and 3 of the specification of chinese patent application with publication number CN 1356598A. Fig. 1 shows the structure of the developing roller and the photosensitive drum of the process cartridge. The photosensitive drum 51 is rotatably supported by a cartridge holder 59 of the process cartridge. The separators 52 and 53 are mounted at both ends of the developing roller 50, which allows the developing roller 50 to be disposed at a predetermined distance from the photosensitive drum 51. The developing roller 50 includes: a roller cylinder 57 made of an aluminum pipe; a magnetic core 56 disposed within the roller 57;

flanges

54 and 55 made of resin; a roller electrode 58 for applying a bias to the developing roller 50, and other auxiliary members. Fig. 2 shows the mechanism of the flange 54 and the roller electrode 58. The roller electrode 58 includes: a contact portion 58a that is in conduction with the roller 57; the contact portion 58b is electrically connected to a developing bias electrode 60 formed on the cartridge holder 59, and a developing bias voltage from the main body of the electrophotographic image forming apparatus is applied to the contact portion 58 b. A roller electrode 58 is disposed on the flange 54. On the surface of the flange 54, a groove 54a is formed in the shape of the roller electrode 58. The flange 54 is fitted into the roller cylinder 57 with a press-fit, and the roller electrode 58 is fitted into the groove 54a, while the contact portion 58a and the inner circumferential surface of the roller cylinder 57 are in contact with each other to conduct. The above-described developing roller 50 is rotatably provided on the process cartridge frame 59 as shown in fig. 1, and the roller electrode 58 and the developing bias electrode 60 are conducted.

The processing box with the structure has the following defects: the developing roller end portion structure is complicated. During installation, the roller electrode (typically a spring) is pre-loaded onto the flange, the roller flange is reloaded into the roller cylinder, and finally the developing bias electrode is installed. When the developing bias electrode is mounted, the roller electrode is prevented from being twisted and exposed, and the mounting process is complicated.

Disclosure of Invention

The first purpose of the utility model is to provide a developing roller with simple structure;

a second object of the present invention is to provide a process cartridge using the developing roller of such a structure.

In order to achieve the first objective, the present invention provides the following technical solutions:

a developing roller comprising

A roller;

a magnetic core arranged in the roller and a flange fixed at the end of the roller;

wherein,

the one flange made of an electrically conductive material has a tubular spring receptacle.

The end structure of the developing roller is simplified, the original insulating resin flange is changed into a flange made of a conductive material, and the flange structure is improved, and the improved flange is provided with a tubular spring bearing seat so as to lead the developing roller into the roller in a biased manner through a conductive spring.

In order to achieve the second objective, the present invention provides the following technical solution:

a process cartridge comprising

The box body consists of a cylindrical shell-shaped bin body for containing developer and developing frames positioned at two ends of the bin body;

the developing roller is positioned in the bin body, can be rotatably supported on the developing frame and comprises a roller, a magnetic core arranged in the roller and flanges fixed at two ends of the roller;

a developing bias electrode fixed on the developing frame at a position of one shaft end of the developing roller;

said one flange of electrically conductive material having a tubular spring receptacle;

one end of a conductive spring is fixed on the developing bias electrode, and the other end of the conductive spring is sleeved on the spring bearing seat in an electrically connected mode.

The utility model discloses the developing roller end structure of processing box obtains simplifying, changes original insulating resin flange into the flange of making by conductive material, makes the developing bias voltage arrive the roller through developing bias voltage electrode, conductive spring, flange.

Drawings

FIG. 1 is a cross-sectional view of a prior art process cartridge component;

FIG. 2 is a perspective view of a roller flange and roller electrode of a prior art process cartridge;

FIG. 3 is an exploded view of the process cartridge component of the present invention;

FIG. 4 is a cross-sectional view of a process cartridge component of the present invention;

fig. 5 is a perspective view of the conductive flange of the process cartridge of the present invention.

The present invention will be further explained with reference to the drawings and examples.

Detailed Description

Referring to fig. 3 and 4, since most of the structures of the present invention are the same as those of the prior art, for the sake of clarity, parts such as the bin body are omitted in fig. 3 and 4, and only the differences between the embodiments of the present invention and the prior art and the related parts are illustrated. The process cartridge of this embodiment includes a photosensitive drum (not shown), a developing roller 5, a flange 4, a conductive spring 3, a developing bias electrode 2, and a developing frame 1. The developing roller 5 is used to develop an electrostatic latent image formed on the photosensitive drum. The flange 4 is made of a conductive material such as aluminum, and is provided at one end portion of the developing roller 5. Referring to fig. 5, the flange 4 has a tubular spring receiving seat 41 at one end, and the conductive spring 3 is sleeved on the spring receiving seat 41 in an electrically connected manner at one end. The conductive spring 3 is electrically connected to the developing bias electrode 2 provided on the right developing frame 1, and the pair of developing frames 1 support the developing roller 5. The conductive spring 3 has one end fixed to the developing bias electrode 2 and the other free end in contact with the flange 4. The developing bias electrode 2 fixes one end of the conductive spring 3 by a plurality of claws that protrude.

Of course, the structural composition of the process cartridge of the present invention is not limited to the above-described embodiments. Obvious modifications to the above-described embodiments, as well as other variations that do not depart from the gist of the invention, are intended to be within the scope of the appended claims.

Claims

1. A developing roller comprising

A roller;

the method is characterized in that:

2. A process cartridge comprising

the method is characterized in that:

one end of a conductive spring is fixed on the developing bias electrode, and the other end is electrically connected

The spring bearing seat is sleeved with the spring.

3. A process cartridge according to claim 2,

the method is characterized in that:

the developing bias electrode fixes one end of the coil spring by a plurality of claws that protrude.