WO2012051812A1

WO2012051812A1 - Powder control device for selenium drum of laser printer

Info

Publication number: WO2012051812A1
Application number: PCT/CN2011/070662
Authority: WO
Inventors: 曹国柱
Original assignee: 珠海市奔码打印耗材有限公司
Priority date: 2010-10-23
Filing date: 2011-01-26
Publication date: 2012-04-26
Also published as: CN101976024B; CN101976024A

Abstract

A powder control device for selenium drum of laser printer has a blade supporter (1), a spongy elastomer (2) fixed on the blade supporter (1), and a thin film (3) coated on the surface of the spongy elastomer (2). Because of the good elasticity, the elastic deformation of the spongy elastomer (2) can compensate the processing errors and assembly errors of the blade supporter, the spongy elastomer itself, and the thin film. The processing precision and assembly difficulty of components are decreased. Meanwhile, the production process is simple, significantly reducing costs.

Description

Powder control device used in laser printer toner cartridge

Technical field

The invention relates to a powder control device for a laser printer and a copying machine developing assembly, in particular to a powder controlling device for a laser printer toner cartridge in a jumping development mode.

Background technique

The development method of the prior art printer is mostly the beating development, and the working principle of the beating development is as follows: the developing device adopts a magnetic roller, and the magnetic roller is composed of a fixed magnetic core rod and an outer rotatable aluminum sleeve. During operation, the toner is adsorbed on the surface of the aluminum sleeve due to the magnetic field force, and acts with the powder controlling device to produce a uniform thickness of toner less than 2 mm as the aluminum sleeve rotates, and the toner band is caused by friction. A certain amount of static electricity. The aluminum sleeve is held at a distance of about 0.3 mm from the photosensitive drum by means of a sheath or a guard wheel at both ends. In addition, an alternating developing bias is applied to the aluminum sleeve, the alternating voltage is about -800 volts to 800 volts, and the dc voltage is about -600 volts. This superimposed bias acts in conjunction with the magnetic field force to push the toner onto the drum to complete the development process.

In this development process, since the aluminum sleeve is directly in contact with the powder control device, in order to satisfy the need for the powder control device, the metal knife holder is used to stick the solid rubber strip, which has high requirements on the dimensional accuracy of the knife holder and the rubber strip, and the process is complicated. Therefore, the cost is high.

Summary of the invention

In order to overcome the deficiencies of the prior art, the present invention provides a powder control device for use in a laser printer toner cartridge with low dimensional accuracy requirements and simple process.

The technical solution adopted by the present invention to solve the technical problem thereof is:

A powder control device for use in a laser printer toner cartridge, comprising a tool holder, characterized in that: the tool holder is provided with a sponge-like elastic body, and the surface of the sponge-like elastic body is coated with a film.

Further, the sponge-like elastomer has a hardness of less than 60 HA.

Further, the film has a thickness of less than 2 mm.

The tool holder is manufactured by plastic injection molding.

The invention has the beneficial effects that the present invention adopts a structure in which a sponge-like elastic body is disposed on a blade holder and a smooth film is coated on the sponge-like elastic body. Because the spongy elastomer has good elasticity, the elastic deformation of the sponge-like elastomer can compensate the machining error or assembly error of the tool holder, the sponge-like elastic body itself, and the film, thereby reducing the processing precision and assembly difficulty of the parts. And the production process is simple, which greatly reduces the cost.

DRAWINGS

The invention will now be further described with reference to the drawings and embodiments.

Figure 1 is a schematic cross-sectional view of the present invention.

detailed description

Referring to Figure 1, the present invention discloses a powder control device for use in a laser printer toner cartridge, comprising a tool holder 1 having a sponge-like elastic body 2 on the surface thereof, the surface of the sponge-like elastic body 2 being coated with a film 3.

Further, the sponge-like elastic body 2 is made of rubber foam, and is firmly adhered to the tool holder 1 by a strong adhesive. The material used may be EPDM, PU, etc., and the sponge-like elastic body 2 has a hardness of less than 60 HA. In the present embodiment, the hardness of the sponge-like elastic body 2 is about 35 HA, and 35HA is a preferable value of the hardness of the sponge-like elastic body 2, and the sponge-like elastic body 2 has the best powder-control effect under this hardness.

Further, since the sponge-like elastic body is a hole-like structure and the surface is not smooth, in order to obtain a smooth surface, the structure is adhered to the surface of the sponge-like elastic body 2 by the film 3, and the thickness of the film 3 is less than 2 mm. The material of the film 3 may be PE, PP, polyester film or the like. In the present embodiment, the material of the film 3 is preferably PP because the PP material has excellent heat resistance, electrical insulation properties and chemical stability; the thickness of the film 3 is about 0.1 mm, and 0.1 mm is the film 3 after use detection. A preferred value for the thickness, the film 3 not only achieves the use requirements at this thickness, but also has minimal effect on the elasticity of the spongy elastomer 2.

As shown in FIG. 1, in the present embodiment, the tool holder 1 is manufactured by plastic injection molding. The above manner is a preferred mode of the embodiment, because the injection molding process is simple and the cost is low, and the plastic material such as POM and ABS can be selected for the plastic. Of course, the tool holder 1 is not limited to the manufacturing of the present method, and can also be obtained by metal material processing or the like.

The working principle of the device is as follows: the toner 5 is adsorbed on the surface of the aluminum sleeve 4 by the magnetic field force and rotates with the aluminum sleeve 4, and the sponge-like elastic body 2 in the device passes through the film 3 and the aluminum sleeve 4 wire. The toner 5 is pressed by contact, and the toner 5 is pushed into a layer of toner 5 having a thickness of less than 2 mm by the extrusion of the sponge-like elastic body 2 and the aluminum sleeve 4, and then the toner is combined by the magnetic force. Push onto the drum to complete the development process.

The foregoing is merely illustrative of the preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above-described embodiments, as long as they achieve the technical effects of the present invention by substantially the same means. The scope of protection.

Claims

A powder control device for use in a laser printer toner cartridge, comprising a tool holder, characterized in that: the knife holder is provided with a sponge-like elastic body, and the surface of the sponge-like elastic body is coated with a film.
A powder controlling device for use in a laser printer toner cartridge according to claim 1, wherein said sponge-like elastomer has a hardness of less than 60 HA.
A powder controlling device for use in a laser printer toner cartridge according to claim 1, wherein said film has a thickness of less than 2 mm.
A powder controlling device for use in a laser printer toner cartridge according to any one of claims 1 to 3, wherein the tool holder is manufactured by plastic injection molding.