CN203941384U - The uniform charging roller of a kind of charging - Google Patents
The uniform charging roller of a kind of charging Download PDFInfo
- Publication number
- CN203941384U CN203941384U CN201420202240.5U CN201420202240U CN203941384U CN 203941384 U CN203941384 U CN 203941384U CN 201420202240 U CN201420202240 U CN 201420202240U CN 203941384 U CN203941384 U CN 203941384U
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- CN
- China
- Prior art keywords
- spongy layer
- charging
- charging roller
- photosensitive drums
- stage casing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
The utility model discloses the uniform charging roller of a kind of charging, include mandrel, spongy layer and conduction surface layer, spongy layer is wrapped on the surface of mandrel, the surface coverage of spongy layer has conduction surface layer, in mandrel stage casing, be distributed with the resistance to deformation ring of more than one opposing spongy layer radial deformation, adopt after technique scheme, owing to increasing some resistance to deformation rings in mandrel stage casing, when charging roller and photosensitive drums are to pressing, because of stage casing distortion, cause stage casing to contact with photosensitive drums insufficient, now due to the existence of resistance to deformation ring, resistance to deformation ring can radially outward prop up, hinder the distortion of spongy layer, compensate the deflection in spongy layer stage casing simultaneously, ordering about stage casing fully contacts with photosensitive drums, effectively guarantee that each position of charging roller and photosensitive drum surface fully contacts, guarantee that charging roller is abundant to photosensitive drum surface, effectively, charging equably, improve the band electricity quality of photosensitive drums.
Description
Technical field:
The utility model relates to the uniform charging roller of a kind of charging.
Background technology:
Conventionally, in utilizing imaging device such as the duplicating machine of the use toner of Electrostatic Electron photography, facsimile recorder, printer etc., toner is supplied to developing apparatus to carry out continuous image printing by comprising the toner feed device of toner Cartridge etc.
The imaging process of this imaging device generally includes following steps: charging, exposure, development, transfer printing, separation, clean, remove electric charge and photographic fixing.
More specifically, in imaging process, the photosensitive drum surface being driven in rotation is recharged roller charge equably (charge step).So the photosensitive drum surface of charging uses the laser beam irradiation of exposure device to form electrostatic latent image (step of exposure).Subsequently, the electrostatic latent image in photosensitive drums is developed device development to form toner image (development step) at photosensitive drum surface.
Toner image in photosensitive drums is transferred device and is transferred to (transfer step) on recording materials, then, is transferred to toner image on recording materials by fixing device heats photographic fixing to recording materials (photographic fixing step).
On the other hand, the remaining toner that remains in photosensitive drum surface after transfer step cleans and uses predetermined collection partly to collect (cleaning) with cleaning device.Photosensitive drum surface after clean is removed residual electric charge to prepare imaging operation (electric charge removing step) next time by charge removing device.
Above-mentioned in steps in, charging roller charges to photosensitive drum surface under 500V～1000V voltage, first step as print procedure, the quality of its charging effect directly affects follow-up implementation quality and final print quality in steps, for fear of occurring that charging roller is inhomogeneous to photosensitive drum charging, must guarantee that charging roller surface is with uniform electric charge, it is very high that this just requires charging roller surface quality to require, also require charging roller fully to contact with photosensitive drums simultaneously, can not there is contacting blind spot, otherwise, blind spot place will produce print defect, during printing, there will be the bad problem of periodically drawing a portrait.
The surface of at present conventional charging roller 01 is axial linear structure, as shown in Figure 1, it consists of mandrel 02, elastic sponge layer 03 and conduction surface layer 04, during spongy layer 03 suit, easily produces knob gauffer, in addition because sponge is flexible, when workman is set with, elongated sometimes, cause spongy layer 03 diameter to diminish, if contraction in length, will cause spongy layer 03 diameter to become large.While pressing rotation with 05 pair of photosensitive drums, as shown in Figure 2, because photosensitive drums 05 is also axial direct linear structure, article two, the surface of roll body is to after pressing, be subject to the impact of charging roller 01 intensity, its two ends can guarantee abundant contact, but middle part there will be the phenomenon of indent, effect as shown in phantom in Figure 2, whether whole piece roll body is fully difficult to guarantee to press contacts, some place there will be and not reach or inadequate situation, cause 01 pair of photosensitive drums 05 of this place's charging roller fill less than electricity or charge insufficient, directly cause affecting follow-up electrostatic latent image quality, the quality of development and photographic fixing, affect the whole print quality of printer.
Utility model content:
The purpose of this utility model is in order to overcome the shortcoming of above-mentioned prior art, and a kind of charging roller that guarantees fully to charge in photosensitive drums workspace is provided.
For achieving the above object, the technical scheme that the utility model provides is: the uniform charging roller of a kind of charging, include mandrel, spongy layer and conduction surface layer, spongy layer is wrapped on the surface of mandrel, the surface coverage of spongy layer has conduction surface layer, is distributed with the resistance to deformation ring of more than one opposing spongy layer radial deformation in mandrel stage casing.
In the both sides of spongy layer, fixed cover is equipped with spacing ring.
The arch shape that resistance to deformation ring cross sectional shape is rounding off.
Spongy layer is foam sponge layer.
Adopt after technique scheme, owing to increasing some resistance to deformation rings in mandrel stage casing, when charging roller and photosensitive drums are to pressing, because of stage casing distortion, cause stage casing to contact with photosensitive drums insufficient, now due to the existence of resistance to deformation ring, resistance to deformation ring can radially outward prop up, hinder the distortion of spongy layer, compensate the deflection in spongy layer stage casing simultaneously, ordering about stage casing fully contacts with photosensitive drums, effectively guarantee that each position of charging roller and photosensitive drum surface fully contacts, guarantee that charging roller is abundant to photosensitive drum surface, effectively, charging equably, improve the band electricity quality of photosensitive drums.
Accompanying drawing explanation:
Fig. 1 is prior art charging roller structural drawing;
Fig. 2 is prior art charging roller and the photosensitive drums structural drawing during to press fit;
Fig. 3 is the laser beam printer structural drawing that adopts the utility model charging roller;
Fig. 4 is the sectional structure chart of the utility model charging roller;
Fig. 5 is the A part enlarged drawing of Fig. 4.
Embodiment:
Preferred forms of the present utility model is described below with reference to accompanying drawings.
Fig. 3 illustrates the constructed profile as the signal structure of the laser beam printer (being designated hereinafter simply as " printer ") 1 of image processing system according to this embodiment.
This printer 1 receives image information from the image information generator (not shown) such as being located at the outside principal computer of printer 1. and printer 1 according to received image information, is carried out a series of images formation processing for the upper formation of recording materials (recording medium) P in sheet image by known electrophotographic system.
Laser beam printer 1 comprises handle box 4, and described handle box 4 accommodates rotatable electronic photographic sensitive drum 2, charging mechanism 8 and the developing device 3 as the drum type of sub-image load bearing component.In addition, printer 1 comprises laser scanner unit (being designated hereinafter simply as " scanner ") 5, it,, according to the image information from the input of image information generator, forms the electrostatic latent image corresponding with image information on the outer surface of photosensitive drums 2 by exposure-processed.Printer 1 also comprises the rotatable transfer member 6 of roller shape of realizing to the processing of recording materials P transferred image, and with heat and pressure, realizes that photographic fixing is processed, to be used as image heater fixing device 7 on the recording materials P to its transferred image.
Handle box 4 is printed owner's body and removably supports.Image processing system part beyond printer main body formation processing box.When needing the repairing of photosensitive drums 2 and when to the safeguarding of developing device 3 replenishment developers, opened can open and can close by the lid 9 of printer body supports after, can replace handle box 4 with new handle box, carry out and safeguard rapidly and simply thus.
Charging mechanism 8 critical pieces are charging roller 81, charging roller 81 is suitable for by apply the bias voltage (regulated bias) of regulation before the exposure-processed at scanner 5 from source power supply, make the outer surface of photosensitive drums 2 during rotation be charged to the Potential distribution of regulation, in order to make photosensitive drums 2 surface chargings even, require charging roller 81 surface quality very high, can not there is scratch, pit, gauffer, the defect of trachoma etc., otherwise, photosensitive drums 2 surface charge skewness after charging, electrostatic latent image degree of accuracy after exposure is looked into very much again, when serious, even cause printing peculiar word or pattern.
Scanner 5 is exported according to the time period electric data image signal of series of the image information from image information generator and modulated laser La.By being located at the window 4a in handle box, laser La scans and exposes the charging region on the outer surface of photosensitive drums 2.Thus, the electrostatic latent image corresponding with image information is formed on the outer surface of photosensitive drums 2.
Next, a series of images formation processing in printer 1 is described.When pressing the start button (not shown) being located in printer, photosensitive drums 2 starts rotation.Photosensitive drums 2 is the circumferential speed rotation with regulation along the clockwise direction shown in arrow K1.Meanwhile, by being applied in the charging mechanism 8 of the bias voltage of regulation, the outer surface of photosensitive drums 2 is charged to the Potential distribution of regulation.
Next, according to the image information from image information generator, the charging region on the outer surface of 5 pairs of photosensitive drums 2 of scanner is scanned and exposes.Therefore, the electrostatic latent image corresponding with described image information is formed on the described charging region of photosensitive drums 2.The developer that this electrostatic latent image is developed device 3 develops and as toner image and visual.
Meanwhile, by the driven feed rolls 12 of the timing to be scheduled to from feeding box 11 1 time periods ground feeding recording materials P.In feeding box 11, comprise multiple and be layered in recording materials P wherein.Feeding box 11 is removably supported by printer.The recording materials P supplying with from feeding box 11 is regularly fed to the transfer printing pressing part being formed between photosensitive drums 2 and transfer member 6 with the control of being scheduled to 12a by registration roller (resist roller), and be held and carry by transfer printing pressing part.When recording materials P is held and carries by transfer printing pressing part, the toner image in photosensitive drums 2 is transferred to recording materials P successively by transfer member 6.
After the recording materials P that is transferred toner image stands toner image heating and photographic fixing processing in fixing device 7, by the photographic fixing distributing roller 10 rotatably being supported, and be discharged to outside printer by paper outlet roller 13.The recording materials P being discharged from rests on the paper output tray 14 that is attached to printer top surface.In this way, complete a series of image formation processing.
Fixing device 7 comprises fixing roller 15 and pressure roll 16.Fixing roller 15 is by the rotatably supported roller shape of not shown structure parts, and can be by not shown driver axial-rotation.The toner in this fixing roller 15 with the formation unfixed toner image that not shown heating element carries with heating and the recording medium that partly transmits from transfer nip of photographic fixing, thus by image fixing to recording medium.
As fixing roller 15, can use the roller shape parts that for example formed by metal-cored and elastic layer.Metal-coredly by metals such as iron, stainless steel, aluminium, formed.Elastic layer is by forming such as silicon rubber, fluororubber elastomeric material.When heating element is never during illustrated power supply service voltage, heating element produces heat.Heating element can be used Halogen lamp LED, infrared lamp etc.
Pressure roll 16 is supported and presses the roller shape parts of fixing roller 15 rotatably by not shown pressure elements.This pressure roll 16 is actuated to rotate along with the rotation of fixing roller 15.Pressure contact portion between fixing roller 15 and pressure roll 16 divides formation fusing nip portion.
When toner image is heated by fixing roller 15 and when photographic fixing is upper to recording medium P, pressure roll 16 is by being pressed onto the toner of fusing the upper toner image that helps of recording medium P to recording medium P.
Pressure roll 16 can be used the roller shape parts with fixing roller 15 with same structure.In pressure roll 16, also can comprise heating element.As this heating element, can use and heating element identical in fixing roller 15.
In fixing device 7, the recording medium of the toner image that transfer printing has on it is when the fusing nip portion, and the toner that forms toner image is by photographic fixing and be pressed onto on recording medium, thus toner image by photographic fixing to recording medium.On it, print and have the recording medium of image to be discharged to paper output tray 14 by paper outlet roller 13.
The above-mentioned charging roller 81 of the present embodiment includes mandrel 811, spongy layer 812 and conduction surface layer 813, spongy layer 812 is foam sponge layer, spongy layer 812 is wrapped on the surface of mandrel 811, the surface coverage of spongy layer 812 has conduction surface layer 813, in mandrel 811 stage casings, be distributed with the resistance to deformation ring 814 of four opposing spongy layer 812 radial deformations, the arch shape that resistance to deformation ring 814 cross sectional shapes are rounding off, this resistance to deformation ring 814 is made by PU or silica gel, large 0.1～the 0.25mm of radius ratio mandrel 811 of resistance to deformation ring 814, be that resistance to deformation ring 814 protrudes 0.1～0.25mm on mandrel 811 surfaces, resistance to deformation ring 814 can be propped up spongy layer 812 like this, make radially outward slight predeformation of spongy layer 812, when 81 pairs of photosensitive drums 2 and charging rollers are pressed, the deflection of predeformation can compensating charge roller 81 stage casings distortion, guarantee that charging roller 81 and photosensitive drums 2 repeat contact charging, in the both sides of spongy layer 812, fixed cover is equipped with spacing ring 815, be provided with after spacing ring 815, the spongy layer 812 of charging roller 81 and conduction surface layer 813 length will be defined, guarantee that spongy layer 812 and conduction surface layer 813 can not be elongated or shorten when suit, affect diameter data.
Produce the process of above-mentioned charging roller: 1. in the stage casing of mandrel, put four resistance to deformation rings, four resistance to deformation rings are evenly spaced apart, 2. put spongy layer, spongy layer wraps whole resistance to deformation rings, 3. on spongy layer, put conduction surface layer, 4. at spongy layer both sides suit spacing ring, spacing ring diameter is suitable with conduction surface layer, limits the length of spongy layer and conduction surface layer simultaneously.
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 (4)
- One kind charging uniform charging roller, include mandrel, spongy layer and conduction surface layer, spongy layer is wrapped on the surface of mandrel, and the surface coverage of spongy layer has conduction surface layer, it is characterized in that: the resistance to deformation ring that is distributed with more than one opposing spongy layer radial deformation in mandrel stage casing.
- 2. the uniform charging roller of a kind of charging according to claim 1, is characterized in that: the arch shape that resistance to deformation ring cross sectional shape is rounding off.
- 3. the uniform charging roller of a kind of charging according to claim 1, is characterized in that:
- 4. the uniform charging roller of a kind of charging according to claim 1, is characterized in that: spongy layer is foam sponge layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420202240.5U CN203941384U (en) | 2014-04-23 | 2014-04-23 | The uniform charging roller of a kind of charging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420202240.5U CN203941384U (en) | 2014-04-23 | 2014-04-23 | The uniform charging roller of a kind of charging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203941384U true CN203941384U (en) | 2014-11-12 |
Family
ID=51860687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420202240.5U Expired - Fee Related CN203941384U (en) | 2014-04-23 | 2014-04-23 | The uniform charging roller of a kind of charging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203941384U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103955125A (en) * | 2014-04-23 | 2014-07-30 | 佛山市埃申特科技有限公司 | Charging roller capable of uniformly charging |
-
2014
- 2014-04-23 CN CN201420202240.5U patent/CN203941384U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103955125A (en) * | 2014-04-23 | 2014-07-30 | 佛山市埃申特科技有限公司 | Charging roller capable of uniformly charging |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141112 Termination date: 20170423 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |