CN202494867U

CN202494867U - Developing roller

Info

Publication number: CN202494867U
Application number: CN2012200193994U
Authority: CN
Inventors: 吉占稳
Original assignee: HANGZHOU KEWEI DIGITAL TECHNOLOGY Co Ltd
Current assignee: HANGZHOU KEWEI DIGITAL TECHNOLOGY Co Ltd
Priority date: 2012-01-17
Filing date: 2012-01-17
Publication date: 2012-10-17
Anticipated expiration: 2022-01-17

Abstract

The utility model relates to the technical field of internal structures of printers and duplicators, in particular to a developing roller. The developing roller comprises a roll shaft, wherein a foamed layer or a rubber layer is sleeved outside the roll shaft; and a resin layer is coated outside the foamed layer or the rubber layer. In the developing roller, the resin layer is coated outside the foamed layer or the rubber layer, so that physical damages to carbon powder are reduced, and fuzziness of images developed on paper caused by pollution of pollutants on a photosensitive drum is avoided; the problem of easiness in generating indentations which are difficult to recover caused by rolling of the surface of the developing roller by the photosensitive drum, a scraping plate and a supply roller is solved; preferably, the foamed layer or the rubber layer and the roll shaft have detachable structures, so that the entire foamed layer or rubber layer is detached from the roll shaft when the resin layer on the surface is damaged.

Description

A kind of developer roll

Technical field

The utility model relates to the inner structure technical field of printer, duplicating machine, specifically, relates to a kind of developer roll.

Background technology

Toner cartridge is the core imaging device of printer, duplicating machine, and developer roll is one of them vitals.The main effect of developer roll is to adhere to developer (such as carbon dust); Its principle of work is: to photosensitive drum charging after certain potentials; On photosensitive drums, form electrostatic latent image through exposure machine, after the developer roll that has carried developer contacted and has the photosensitive drums of electrostatic latent image, developer was attached to the photosensitive drums sub-image; Obtain required influence, through fixing roller the developer photographic fixing on paper.

The most structure of the developer roll that uses at present is; On metal or rigid plastic axle, cover one deck rubber layer; There is big problem in the developer roll of this structure, and the state limit that 1. developer roll must the limit keeps being adjacent to photosensitive drums during work rotates, the part carbon dust herein through compress repeatedly and rub after receive physical damage; Form sticking carbon piece of aggegation heat or carbon granules that all size differs, cause the carbon dust deterioration; 2. rubber layer can penetrate multiple pollutant, and developer roll pollutes photosensitive drums when contacting with photosensitive drums, make the photosensitive drum surface charging property inhomogeneous, causes photographic fixing image blurring on paper; 3. the rubber layer of developer roll surface is easy to generate the impression problem that is difficult to restore because receiving photosensitive drums, scraper plate and donor rollers rolls, and the impression tendency that has distortion to increase, influences fixing quality.

The utility model content

The purpose of the utility model is to overcome the deficiency of prior art, adapts to the needs of reality, and a kind of developer roll is provided.

In order to realize the purpose of the utility model, the technical scheme that the utility model adopts is:

A kind of developer roll comprises roll shaft, and said roll shaft outer cover is equipped with foaming layer or rubber layer, and said foaming layer or rubber layer are externally coated with resin bed.

Said foaming layer or rubber layer and roll shaft are demountable structure, and said foaming layer or rubber layer and externally coated resin bed are become one.

Said foaming layer or rubber layer and roll shaft are through being threaded.

Said foaming layer or rubber layer are plugged on through slot and grafting auricle with roll shaft.

The beneficial effect of the utility model is:

Through at the outside coated with resins layer of foaming layer or rubber layer, reduced the physical damage that carbon dust receives, avoided the contaminants photosensitive drums, cause photographic fixing image blurring on paper; Reduce developing roller surface because receiving photosensitive drums, scraper plate and donor rollers rolls, be easy to generate the impression problem that is difficult to restore; Foaming layer or rubber layer and roll shaft are demountable structure, when the resin bed on surface is damaged, foaming layer or rubber layer are unloaded from roll shaft, and integral replacing gets final product.

Description of drawings

Fig. 1 is one of sectional structure synoptic diagram of the utility model;

Fig. 2 be the utility model the sectional structure synoptic diagram two;

Fig. 3-1 be the utility model the sectional structure synoptic diagram three;

Fig. 3-2 analyses and observe enlarged diagram for the A-A of Fig. 3-1;

Fig. 4-1 be the utility model the sectional structure synoptic diagram four;

Fig. 4-2 analyses and observe enlarged diagram for the B-B of Fig. 4-1.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is further specified:

Embodiment one: referring to Fig. 1.

A kind of developer roll comprises roll shaft 1, and said roll shaft 1 outer cover is equipped with foaming layer 2, and said foaming layer 2 is externally coated with resin bed 3.

Foaming layer 2 is a demountable structure with roll shaft 1, and said foaming layer 2 is become one with externally coated resin bed 3.

Wherein, roll shaft 1 adopts conductive material, such as conducting metals such as iron, stainless steels.Foaming layer 2 is sleeved on the outside of roll shaft 1, can reduce the use amount of resin bed 3, because the cost of resin bed 3 is higher usually, and seriously polluted, is employed in the mode of foaming layer 2 outside coated with resins layers 3, can reduce cost, and reduces and pollutes.Foaming layer 2, resin bed 3 can contain other compositions such as conductive agent as required.Through at the outside coated with resins layer 3 of foaming layer, reduced the physical damage that carbon dust receives, avoided the contaminants photosensitive drums, cause photographic fixing image blurring on paper; Reduce developing roller surface because receiving photosensitive drums, scraper plate and donor rollers rolls, be easy to generate the impression problem that is difficult to restore.Foaming layer 2 is a demountable structure with roll shaft 1, when the resin bed 3 on surface is damaged, foaming layer 2 is unloaded from roll shaft 1, and integral replacing gets final product.

In the present embodiment, said foaming layer 2 and roll shaft 1 are through being threaded.

Embodiment two: referring to Fig. 2.

Present embodiment and embodiment one are basic identical, and its something in common is not given unnecessary details, and difference only is that in the present embodiment, said roll shaft 1 outer cover is equipped with rubber layer 4, and said rubber layer 4 is externally coated with resin bed 3.With respect to foaming layer 2, rubber layer 4 is more common materials.

Embodiment three: referring to Fig. 3-1, and Fig. 3-2.

Present embodiment and embodiment one are basic identical, and its something in common is not given unnecessary details, and difference only is that in the present embodiment, said foaming layer 2 is plugged on through slot and grafting auricle with roll shaft 1.Shown in Fig. 3-2, roll shaft 1 surface has slot, and there is the grafting auricle of protrusion on foaming layer 2 surfaces, and the two can be plugged on together.

Embodiment four: referring to Fig. 4-1, and Fig. 4-2.

Present embodiment and embodiment one are basic identical, and its something in common is not given unnecessary details, and difference only is that in the present embodiment, said rubber layer 4 is plugged on through slot and grafting auricle with roll shaft 1.

What the embodiment of the utility model announced is preferred embodiment; But be not limited thereto, those of ordinary skill in the art is very easily according to the foregoing description; Understand the spirit of the utility model; And make different amplifications and variation, but only otherwise break away from the spirit of the utility model, all in the protection domain of the utility model.

Claims

1. a developer roll comprises roll shaft, it is characterized in that: said roll shaft outer cover is equipped with foaming layer or rubber layer, and said foaming layer or rubber layer are externally coated with resin bed.

2. a kind of developer roll according to claim 1 is characterized in that: said foaming layer or rubber layer and roll shaft are demountable structure, and said foaming layer or rubber layer and externally coated resin bed are become one.

3. a kind of developer roll according to claim 2 is characterized in that: said foaming layer or rubber layer and roll shaft are through being threaded.

4. a kind of developer roll according to claim 2 is characterized in that: said foaming layer or rubber layer are plugged on through slot and grafting auricle with roll shaft.