CN204925623U - Developer roll, development cartridge and laser developing apparatus - Google Patents

Abstract

The utility model provides a developer roll, development cartridge and laser developing apparatus. The developer roll includes axle core and elastic layer, and the elastic layer wraps up outside the axle core, the periphery parcel of elastic layer has metal layer. Development cartridge uses foretell developer roll, and the laser developing apparatus then uses foretell development cartridge. Metal layer can effectively solve developer roll periodic horizontal informal voucher problem that appears in the developing process. In addition, the surface resistance of current elastic layer is great, and metal layer's setting can effectively reduce the surface resistance of developer roll, increases the electric conductive property of elastic layer.

Description

Developer roll, Delevoping cartridge and laser development equipment

Technical field

The utility model relates to electrophotographic image forming field, specifically, relates to a kind of developer roll, a kind ofly uses the Delevoping cartridge of this developer roll and a kind of laser development equipment using this Delevoping cartridge.

Background technology

Electrophotographic image forming is as being usually provided with a Delevoping cartridge in laser printer, and Delevoping cartridge can be dismantled in laser printer.

At present, existing Delevoping cartridge mainly comprises following two kinds of modes: the first is the jump type developing box that photosensitive drums and developing device separate; The second is the contact type developing box that photosensitive drums and developing device take the way of contact.

In the developing apparatus using contact type developing box, there is graphics processing unit and developing cell usually, the developer utilizing developing cell to provide such as carbon dust forms latent electrostatic image developing on graphics processing unit, is then transferred to medium as paper forms visual picture.Wherein, carbon dust, as consumables, after it is exhausted, needs again to supplement in developing apparatus.

Particularly, as shown in Figure 1, the groundwork process of Delevoping cartridge can be divided into charging, exposure, development, transfer printing, fixing and clean six steps.Charge step is charge equably in charging roller 4 pairs of photosensitive drums 6 surfaces.Step of exposure is the photoconductive property on the surface utilizing photosensitive drums 6, and the laser beam 31 that laser scanning system 3 produces makes the surface of photosensitive drums 6 expose, and the surface of photosensitive drums 6 forms electrostatic latent image.Development step be developer particle 1 in powder storehouse along with the rotation of developer roll 10 by electric charge on powder outlet cutter 2 extrusion friction band, and on the surface of developer roll 10, form the uniform developer layer of thickness, what charged developer particle was transferred to the surface of photosensitive drums 6 under the effect of electric field force from the surface of developer roll 10 is exposed region.Transfer step for filled by transfer roll 9 pairs of paper 7 with developer particle with contrary electric charge, the developer particle be adsorbed on the surface of photosensitive drums 6 is attracted on paper by the electric charge on paper.Fix steps is by upper fixing roller 81 and the effect of downforce roller 82, utilizes heat and pressure developer particle is melted and infiltrates in the fiber of paper.Cleaning is that the developer particle residued on the surface of photosensitive drums 6 is removed by cleaning doctor 5, forms useless powder 11 and is accommodated in waste powder hopper.It is to be noted, developing device shown in Fig. 1 and image-forming assembly are the one in existing numerous type developing apparatus, in fact, according to different real needs can integrated go out dissimilar developing apparatus, be such as do not need to arrange waste powder hopper and photosensitive drums cleaning doctor in some developing apparatuses.

In existing Delevoping cartridge, the electrofax principle that utilizes developing cell shifts the developers such as carbon dust in the process of graphics processing unit (photosensitive drums), need to consider the spacing between developing cell and graphics processing unit, excessive spacing can cause carbon dust shift less and affect print quality, if spacing is too small, certain impression can be caused to the roll body of developing roller surface (elastic layer), thus cause follow-up printing to there is unfavorable condition.In addition, in developing process, need the critical component used as photosensitive drums, charging roller, developer roll, scraper, powder outlet cutter, carbon dust etc., when wherein any part fits is not good, all easily cause the problem that development effect is not good, particularly when the grey version of printing, be easily subject to the impact of developer roll and periodically occur the situation of horizontal informal voucher.

Utility model content

Fundamental purpose of the present utility model is to provide a kind of skin hardness and strengthens, prints the developer roll that hawk is better, surfaceness is less.

Another object of the present utility model is to provide a kind of Delevoping cartridge using this developer roll.

An object more of the present utility model is to provide a kind of laser development equipment using this Delevoping cartridge.

The developer roll that the utility model provides comprises axle core and elastic layer, and elastic layer is wrapped in outside axle core; The periphery of elastic layer is enclosed with metallic diaphragm.

From such scheme, metallic diaphragm effectively can solve the horizontal informal voucher problem that developer roll periodically occurs in developing process.In addition, the surface resistance of existing elastic layer is comparatively large, and the setting of metallic diaphragm effectively can reduce the surface resistance of developer roll, increases the electric conductivity of elastic layer.In addition, metallic diaphragm obviously can improve the roughness on the elastic layer surface of existing developer roll, provides a kind of more smooth developing roller surface.In addition, metallic diaphragm can improve the skin hardness of developer roll, and this hardness is higher than the original hardness of elastic layer, therefore, it is possible to the rebound resilience problem of solution elastic layer.

A preferred scheme is, metallic diaphragm is titanium film layer.

From such scheme, although metallic diaphragm can also choose the good metallic diaphragm of other electric conductivity such as tantalum film layer or aluminum membranous layer, titanium film layer is then most preferably scheme.On the one hand, titanium film layer not only electric conductivity is good and pure titanium is easily oxidized and form fine and close oxide film, therefore it has good corrosion resistivity, thus plays certain protective effect to developer roll, extends the serviceable life of developer roll; On the other hand, titanium film layer has possessed the advantage of steel and aluminium simultaneously, i.e. light weight but hardness is high, thus can ensure the hardness number of metallic diaphragm, avoids the rebound resilience problem of elastic layer further.

A preferred scheme is, the thickness of metallic diaphragm is between 0.5 micron to 8 microns.

From such scheme, by analysis after contrast experiment, find that the performance of the surface resistance of elastic layer, hawk, contaminative is good, be better than the existing correlated performance not having the developer roll of plated film.

Preferred scheme is that the thickness of metallic diaphragm is between 1 micron to 2 microns further.

From such scheme, by analysis after contrast experiment, when the thickness of metallic diaphragm is in this interval range, find that the performance of the surfaceness of developer roll, grey version, pollutant performance is promoted further.

Further preferred scheme is that the thickness of metallic diaphragm is 1 micron.

From such scheme, by analysis after contrast experiment, find that the performance of the surfaceness of developer roll, hawk and contaminative is the most excellent, it can as most preferably scheme.

A preferred scheme is that the mode of being plated by plasma forms metallic diaphragm on elastic layer.

From such scheme, this mode easily controls the thickness of metallic diaphragm on elastic layer, and thickness is very remarkable on the impact of metallic diaphragm, therefore chooses this mode plated film and has very important practice significance.

The Delevoping cartridge that the utility model provides comprises developer roll, and developer roll comprises axle core and elastic layer, and elastic layer is wrapped in outside axle core; The periphery of elastic layer is enclosed with metallic diaphragm.

A preferred scheme is, the thickness of metallic diaphragm is between 0.5 micron to 8 microns, and metallic diaphragm is titanium film layer, and the mode of being plated by plasma forms metallic diaphragm on elastic layer.

The laser development equipment that the utility model provides comprises Delevoping cartridge, and Delevoping cartridge comprises developer roll, and developer roll comprises axle core and elastic layer, and elastic layer is wrapped in outside axle core; The periphery of elastic layer is enclosed with metallic diaphragm.

A preferred scheme is, the thickness of metallic diaphragm is between 0.5 micron to 8 microns; Metallic diaphragm is titanium film layer; The mode of being plated by plasma forms metallic diaphragm on elastic layer.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of the part-structure developing process of existing a kind of developing apparatus.

Fig. 2 is the structural drawing of the developer roll embodiment that the utility model provides.

Fig. 3 is the front view of the developer roll embodiment that the utility model provides.

Fig. 4 is the cut-open view of the developer roll embodiment that provides of the utility model circumferentially after the cutting of direction.

Below in conjunction with drawings and Examples, the utility model is described in further detail.

Embodiment

As shown in Figure 2, Figure 3 and Figure 4, the developer roll that the utility model provides comprises axle core 10 and elastic layer 20, and elastic layer 20 is wrapped in outside axle core 10, and the periphery of elastic layer 20 has metallic diaphragm 30.The mode that the utility model can be plated by plasma forms metallic diaphragm 30 on elastic layer 20, metallic diaphragm 30 is preferably titanium film layer, metallic diaphragm 30 can be tantalum film layer or aluminum membranous layer as an alternative, the metal that metallic diaphragm 30 is selected should have good electric conductivity, and this electric conductivity at least should be greater than the intrinsic electric conductivity of the elastic layer 20 of developer roll.The preferred thickness of metallic diaphragm 30 between 0.5 micron to 8 microns, in addition, as preferred scheme, the thickness of metallic diaphragm 30 between 1 micron to 2 microns, further preferably after scheme in, the thickness of metallic diaphragm 30 is 1 micron.

The Delevoping cartridge that the utility model provides comprises developer roll, and developer roll comprises axle core and elastic layer, and elastic layer is wrapped in outside axle core.Wherein, the mode can plated by plasma forms metallic diaphragm on elastic layer, and metallic diaphragm is preferably titanium film layer, and thickness is between 0.5 micron to 8 microns.In addition, as preferred scheme, the thickness of metallic diaphragm is between 1 micron to 2 microns, and in the scheme further preferably, the thickness of metallic diaphragm is 1 micron.

The laser development equipment that the utility model provides comprises Delevoping cartridge, and Delevoping cartridge comprises developer roll, and developer roll comprises axle core and elastic layer, and elastic layer is wrapped in outside axle core.Wherein, the mode can plated by plasma forms metallic diaphragm on elastic layer, and metallic diaphragm is preferably titanium film layer, and thickness is between 0.5 micron to 8 microns.In addition, as preferred scheme, the thickness of metallic diaphragm is between 1 micron to 2 microns, and in the scheme further preferably, the thickness of metallic diaphragm is 1 micron.

In order to further illustrate the excellent properties of the developer roll that the utility model provides, carry out testing characterizing to the developer roll of four kinds of different titanium film layer thicknesses respectively, obtain the data of corresponding surfaceness, surface resistance, grey version and contaminative, then these data are gathered, and the corresponding test result of these data to the existing developer roll not carrying out surface coating is compared, resulting in the data that following table gathers.

Test item	Non-surface coating	Embodiment 1	Embodiment 2	Embodiment 3	Embodiment 4
						Thicknesses of layers	There is no plated film	0.5 micron	1 micron	2 microns	8 microns
Surfaceness	Ra:0.85~1.12	Ra:0.71~0.99	Ra:0.62~0.89	Ra:0.65~0.87	Ra:2.44~2.97
						Surface resistance	20000 Europe	10000 Europe	10000 Europe	10000 Europe	10000 Europe
Ash version	Generally	Good	Excellent	Good	Good
						Contaminative	Good	Good	Excellent	Good	Good

From the data of upper table, the developer roll with titanium film layer shows more excellent characteristic compared to not having the developer roll of plated film.And as preferred scheme, when the thickness of titanium film layer is at 1 micron to 2 microns, its surfaceness obtaining developer roll is minimum, and when thickness excessive or too small after, surfaceness all can increase.In addition, most preferably scheme is the thickness of titanium film layer is 1 micron, and the surfaceness of developer roll now, surface resistance, grey version and contaminative all show the most excellent, and developer roll result of use is best.

It is the correlation technique content disclosing elastic layer in the Chinese utility model patent application of CN200980145884.7 at application number, and be the job operation disclosing a kind of periphery of developer roll in the Chinese utility model patent application of CN200410094933.8 at application number, the technology of above-mentioned two sections of patents can as prior art of the present utility model as a reference.Finally it should be noted that, the utility model is not limited to above-mentioned embodiment.The designs of the good metal of other electric conductivity of the material selection of such as metallic diaphragm etc. are also within claims of the present utility model.

Claims (10)

1. developer roll, comprising:

Axle core;

Elastic layer, described elastic layer is wrapped in outside described axle core;

It is characterized in that:

The periphery of described elastic layer is enclosed with metallic diaphragm.

2. developer roll according to claim 1, is characterized in that:

Described metallic diaphragm is titanium film layer.

3. developer roll according to claim 1, is characterized in that:

The thickness of described metallic diaphragm is between 0.5 micron to 8 microns.

4. developer roll according to claim 3, is characterized in that:

The thickness of described metallic diaphragm is between 1 micron to 2 microns.

5. developer roll according to claim 4, is characterized in that:

The thickness of described metallic diaphragm is 1 micron.

6. the developer roll according to any one of claim 1 to 5, is characterized in that:

The mode of being plated by plasma forms described metallic diaphragm on described elastic layer.

7. Delevoping cartridge, comprising:

Developer roll, described developer roll comprises axle core;

Elastic layer, described elastic layer is wrapped in outside described axle core;

It is characterized in that:

The periphery of described elastic layer is enclosed with metallic diaphragm.

8. Delevoping cartridge according to claim 7, is characterized in that:

The thickness of described metallic diaphragm is between 0.5 micron to 8 microns, and described metallic diaphragm is titanium film layer, and the mode of being plated by plasma forms described metallic diaphragm on described elastic layer.

9. laser development equipment, comprises Delevoping cartridge, and described Delevoping cartridge comprises:

Developer roll, described developer roll comprises axle core;

Elastic layer, described elastic layer is wrapped in outside described axle core;

It is characterized in that:

The periphery of described elastic layer is enclosed with metallic diaphragm.

10. laser development equipment according to claim 9, is characterized in that:

The thickness of described metallic diaphragm is between 0.5 micron to 8 microns;

Described metallic diaphragm is titanium film layer;

The mode of being plated by plasma forms described metallic diaphragm on described elastic layer.