CN203480212U - Hard charging roller with long service life and high charging quality - Google Patents

Abstract

The utility model discloses a hard charging roller with a long service life and high charging quality. The hard charging roller comprises a base roller which is provided with a convex rib covered by a rubber layer, a groove corresponding to the convex rib is arranged in an inner duct of the rubber layer, a conducting coating is coated on the outer surface of the rubber layer, and the conducting coating is a conducting water-soluble coating. By adopting the technical scheme, the convex rib is additionally arranged on the base roller, so that even if the base roller and the rubber layer loosen, the hard charging roller can ensure the charging effect of a photosensitive drum, and the charging quality is not affected, thus, the service life of the charging roller is prolonged.

Description

A kind of long service life, the high hard charging roller of charging quality

Technical field:

The utility model relates to a kind of long service life, the high hard charging roller of charging quality.

Background technology:

In general, in the image processing system of electrofax mode, electrostatic latent image is formed on to photosensitive drum surface, by toner, the electrostatic latent image of photosensitive drum surface is developed, at photosensitive drum surface, form toner image, toner image is transferred to recording chart from photosensitive drums, and recording chart is heated and pressurizeed, and make toner image to recording chart.

Formation for electrostatic latent image is all by charging roller, photosensitive drums to be charged, make photosensitive drum surface charged, then carry out exposure-processed, obtain electrostatic latent image, so will obtain that precision is high, the prerequisite of the measured electrostatic latent image of matter is that charging roller must be to photosensitive drum surface charging evenly.Current hard charging roller consists of standard shaft, rubber layer and conductive coating, standard shaft is the smooth smooth face of cylinder, this standard shaft structure in use for some time, because charging roller and photosensitive drums are moving to nip drum for a long time, there will be because standard shaft produces and becomes flexible with rubber layer, affect the charging effect of charging roller to photosensitive drums, when serious, even producing rolls skids, photosensitive drum surface can not be recharged, the hard charging roller that now can only more renew, so the hard charging roller of this kind of structure is shorter serviceable life.

Summary of the invention:

The purpose of this utility model is in order to overcome the shortcoming of above-mentioned prior art, and a kind of long service life, the high hard charging roller of charging quality are provided.

For achieving the above object, the technical scheme that the utility model provides is: a kind of long service life, the high hard charging roller of charging quality, include standard shaft, on standard shaft, be provided with convex tendon, on standard shaft, cover rubber layer, and the inner duct of rubber layer is provided with the groove corresponding with convex tendon, at the outside surface of rubber layer, be coated with conductive coating.

Described conductive coating is conductivity water soluble paint.

Adopt after technique scheme, by set up convex tendon on standard shaft, even if order occurs loosening to standard shaft and rubber layer, hard charging roller also can guarantee the charging effect to photosensitive drums, and charging quality can not be affected, that is to say, extended the serviceable life of hard charging roller.

Accompanying drawing explanation:

Fig. 1 is the structural representation of image processing system;

Fig. 2 is the structural representation of the utility model hard charging roller;

Fig. 3 is the decomposition chart of the utility model hard charging roller.

Embodiment:

Referring to accompanying drawing, describe embodiment of the present utility model in detail.

The structure > of < image processing system

Fig. 1 means the structural drawing of image processing system.

With reference to Fig. 1, the image processing system of present embodiment comprises: for reading the original document reading apparatus B of the image of original copy; And apparatus main body A, the original image being read by original document reading apparatus B or the image that receives from outside are formed into recording chart with colored or monochromatic record.

In original document reading apparatus B, after original copy being placed on original copy holding tray 41, original copy pick-up roller 44 is pressed into original copy surface rotation, and original copy is drawn from coiling 41, original copy 46 of separate roller 45 and separating pads by and after separated one by one, be sent to transfer path 47.

In transfer path 47, the front end of original copy and registration roller 49 butts, the front end of original copy and registration roller 49 parallel aligned, original copy is transmitted by registration roller 49 and by reading guide 51 with read between glass 52 afterwards.Now, the light of the light source of the first scanner section 53 is irradiated to original copy surface via reading glass 52, its reflected light incides the first scanner section 53 via reading glass 52, this reflected light is drawn guided imaging lens 55 by the catoptron of first and second scanner section 53,54 reflection, by imaging len 55 by the image imaging of original copy to CCD (Charge Coup1edDevice) 56.CCD 56 reads the image of original copy the view data that output represents original image.And then original copy is transmitted by transfer roller 57, and be discharged to ADF dish 59 via exit roller 58.

In addition, this image processing system can read the original copy being placed on manuscript table glass 61.Specifically, registration roller 49, reading guide 51, ADF dish 59 and more integrated than the parts of their top sides, and become, can be opened and closed pivotal support at the lid of the rear side of original document reading apparatus B, if open the lid of this upside, manuscript table glass 61 is open, original copy can be placed on manuscript table glass 61.Placed original copy and closed after lid, first and second scanner section 53,54 moves to sub scanning direction, simultaneously by the original copy face exposure on 53 pairs of manuscript table glass 61 of the first scanner section, by first and second scanner section 53,54, the reflected light from original copy surface is drawn to guided imaging lens 55, by imaging len 55 by the image imaging of original copy to CCD 56.Now, it is mobile that first and second scanner section 53,54 maintains predetermined length velocity relation each other, the position relationship of first and second scanner section 53,54 is always maintained so that do not change according to the length of the catoptrical light path of the order of original copy surface → first and second scanner section 53,54 → imaging len, 55 → CCD 56, thereby the focus of the image of the original copy on CCD 56 is always correctly maintained.

The image of the original copy reading so all sends to the apparatus main body A of image processing system as view data, in apparatus main body A, record an image on recording chart.

On the other hand, the apparatus main body A of this image processing system comprises laser explosure device 1, developing apparatus 2a, 2b, 2c, 2d, photosensitive drums 3a, 3b, 3c, 3d, charging roller 5a, 5b, 5c, 5d, cleaning device 4a, 4b, 4c, 4d, intermediate transfer belting 8, fixing device 12, sheet feeding 18, paper feed tray 10 and ADF dish 15 etc.

The view data of processing in this image processing system is data corresponding to coloured image of all kinds with having used black (K), cyan (C), magenta (M), yellow (Y), or the data for example, with the monochrome image that has used monochromatic (black) corresponding.Therefore, developing apparatus 2a, 2b, 2c, 2d, photosensitive drums 3a, 3b, 3c, 3d, charging roller 5a, 5b, 5c, 5d and cleaning device 4a, 4b, 4c, 4d arranges respectively 4 to form and 4 kinds of corresponding latent images of all kinds, " a " corresponding to black, " b " corresponding to cyan, " c " corresponding to magenta, " d " corresponding to yellow, and formed 4 image stations.In addition, in the following description, general name developing apparatus 2a, 2b, 2c, is called " developing apparatus 2 " during 2d, general name photosensitive drums 3a, 3b, 3c, during 3d, be called " photosensitive drums 3 ", general name charging roller 5a, 5b, 5c, is called " charging roller 5 " during 5d, general name cleaning device 4a, 4b, 4c, is called " cleaning device 4 " during 4d.

Photosensitive drums 3 is configured in the substantial middle of apparatus main body A.

Charging roller 5 is to be the charged mechanism of predetermined potential for making the surface uniform of photosensitive drums 3 charged.

Laser explosure device 1 is the laser scan unit (LSU) with laser diode and catoptron, according to view data, is exposed in charged photosensitive drums 3 surfaces, forms in its surface the electrostatic latent image corresponding with view data.

Developing apparatus 2 develops by (K), (C), (M) and toner (Y) electrostatic latent image being formed in photosensitive drums 3.

Cleaning device 4 for remove and be recovered in develop and image transfer printing after remain in the toner on photosensitive drums 3 surfaces.

Above photosensitive drums 3, configure intermediate transfer belting 8.This intermediate transfer belting 8 comprises intermediate transfer belt 7, intermediate transfer belt driven roller 21, driven voller 22, intermediate transfer rollers 6a, 6b, 6c, 6d and intermediate transfer belt cleaning device 9.In addition, general name intermediate transfer rollers 6a, 6b, 6c, is called " intermediate transfer rollers 6 " during 6d.

The tenters such as intermediate transfer belt driven roller 21, intermediate transfer rollers 6 and driven voller 22 also support intermediate transfer belt 7, and make intermediate transfer belt 7 to arrow C directional ring around movement.

Intermediate transfer rollers 6 is across intermediate transfer belt 7 and photosensitive drums 3 crimping.Therefore, this intermediate transfer rollers 6 is applied for the toner image of photosensitive drums 3 being transferred to the transfer bias of intermediate transfer belt 7.

Intermediate transfer belt 7 is set to and each photosensitive drums 3a, 3b, 3c, 3d contact, by by each photosensitive drums 3a, 3b, 3c, the toner image on 3d surface is overlapping being transferred on intermediate transfer belt 7 successively, and form colored toner image (above-mentioned toner image of all kinds).The film of this intermediate transfer belt 7 used thickness 100 μ m～150 μ m left and right and form endless belt-shaped.

The transfer printing of the toner image from photosensitive drums 3 to intermediate transfer belt 7, is undertaken by the intermediate transfer rollers 6 that is crimped onto intermediate transfer belt 7 inner faces.In intermediate transfer rollers 6, for transfer printing toner image, be applied with high-tension transfer bias (with the high voltage of charged polarity (-) opposite polarity (+) of toner).

Intermediate transfer rollers 6 is to take the roller that the axle of metal (such as stainless steel) system of diameter 8～1Omm is basis and the covering of its surperficial resilient material by electric conductivity (such as EPDM and polyurathamc etc.).By the resilient material of this electric conductivity, can apply equably high voltage to recording chart.

As mentioned above, each photosensitive drums 3a, 3b, 3c, the toner image on 3d surface is folded at intermediate transfer belt 7 upper quilt layers, becomes by the represented colored toner image of view data.Stacked like this toner image of all kinds is transmitted together with intermediate transfer belt 7, and is transferred on recording chart by the secondary transfer printing device 11 contacting with intermediate transfer belt 7.

The transfer roll 11a of intermediate transfer belt 7 and secondary transfer printing device 11 crimping and form clamping zone each other.In addition on the transfer roll 11a of secondary transfer printing device 11, apply for the toner image of all kinds on intermediate transfer belt 7 being transferred to voltage on recording chart (with the high voltage of charged polarity (-) opposite polarity (+) of toner).And then, in order stably to obtain this clamping zone, make the transfer roll 11a of secondary transfer printing device 11 and any in intermediate transfer belt driven roller 21 for hard material (metal etc.), another soft material (elastic caoutchouc roller or foaminess resin roll etc.) such as be resilient roller.

In addition, sometimes the toner image on intermediate transfer belt 7 is not transferred on recording chart by secondary transfer printing device 11 and toner remains in the situation on intermediate transfer belt 7 completely, and this remaining toner can become the reason that produces the colour mixture of toner in ensuing operation.Therefore, by intermediate transfer belt cleaning device 9, remove and reclaim remaining toner.

In intermediate transfer belt cleaning device 9, for example as cleaning member, be provided with the cleaning balde contacting with intermediate transfer belt 7, at the position of cleaning balde contact, by driven voller 22, supported the inboard of intermediate transfer belt 7.

Paper feed tray 10 is the dishes for put paper, is arranged on the downside of the image forming part of apparatus main body A.In addition the ADF dish 15 of, being located at the upside of image forming part is for placing with the state that faces down the dish of printing complete recording chart.

In addition, in apparatus main body A, be provided with sheet feeding 18, for the recording chart of paper feed tray 10 is sent to ADF dish 15 via secondary transfer printing device 11 and fixing device 12.This sheet feeding 18 has the paper transport path S of S word shape, along paper transport path S, disposes pick-up roller 16, registration roller 14, fixing device 12, transfer roller 13 and exit roller 17 etc.

Pick-up roller 16 is arranged on the end of paper feed tray 10, for recording chart being one by one supplied to from paper feed tray 10 to the suction roller of paper transport path S.

Transfer roller 13 is that along paper transport path, S arranges in many places for promoting the little forming roll of the transmission of auxiliary record paper.

The recording chart that registration roller 14 makes to send temporarily stops and the front end of the recording chart that aligns, so that the clamping zone that the colored toner image on intermediate transfer belt 7 is asked at intermediate transfer belt 7 and secondary transfer printing device 11 is transferred to the mode on recording chart, as one man adjust transfer sheet on opportunity with the rotation of photosensitive drums 3 and intermediate transfer belt 7.

Fixing device 12 the has received transfer printings recording chart of toner image, the clamping zone that this recording chart is clipped in to 32 of warm-up mill 31 and backer rolls transmits, to recording chart heating and pressurization, and to the toner image on recording chart.

Recording chart after toner image of all kinds is discharged on ADF dish 15 by exit roller 17.

In addition, in this image processing system, also can only utilize an image to form station and form monochrome image, monochrome image is transferred on the intermediate transfer belt 7 of intermediate transfer belting 8.This monochrome image also with coloured image similarly, from intermediate transfer belt 7, be transferred to recording chart, and photographic fixing is to recording chart.

In addition, not only record recto, when carrying out two-sided printing, the image that is recorded recto by 12 pairs of fixing devices has carried out after photographic fixing, at exit roller 17 transfer sheets by paper transport path S midway, after being stopped, exit roller 17 makes it reverse rotation, make recording chart through reversing paths Sr, make the positive and negative reversion of recording chart, recording chart is directed to registration roller 14, with record recto similarly at the back side of recording chart document image and make it photographic fixing, then recording chart is discharged to ADF dish 15.

In above-mentioned parts, hard charging roller 5 is primary importance parts, its charging effect quality on photosensitive drums 3 is the quality of direct follow-up each step of impact, hard charging roller 5 structures of the present utility model as shown in Figures 2 and 3, include standard shaft a1, on standard shaft a1, be provided with convex tendon a2, rubber layer a3 covers on standard shaft a1, and the inner duct of rubber layer a3 is provided with the groove a4 corresponding with convex tendon a2, outside surface at rubber layer a3 is coated with conductive coating a5, and described conductive coating a5 is conductivity water soluble paint.The existence of convex tendon a2 can be played and prevent that rubber layer a3 from rolling occurring and skid, and guarantees the charging quality of 5 pairs of photosensitive drums 3 of charging roller, thereby improves print quality.

The above, be only preferred embodiment of the present utility model, not the utility model done to any pro forma restriction.Any those of ordinary skill in the art, do not departing from technical solutions of the utility model scope situation, all can utilize method and the technology contents of above-mentioned announcement to make many possible changes and modification to technical solutions of the utility model, or be revised as the equivalent embodiment of equivalent variations.Therefore the content that does not depart from technical solutions of the utility model every, the equivalence of doing according to shape, structure and the principle of the utility model changes, and all should be covered by protection domain of the present utility model.

Claims (2)

1. a long service life, the high hard charging roller of charging quality, include standard shaft, it is characterized in that: on standard shaft, be provided with convex tendon, on standard shaft, cover rubber layer, and the inner duct of rubber layer is provided with the groove corresponding with convex tendon, at the outside surface of rubber layer, be coated with conductive coating.

2. a kind of long service life according to claim 1, the high hard charging roller of charging quality, is characterized in that: described conductive coating is conductivity water soluble paint.

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