CN101477322A - Image formation equipment - Google Patents
Image formation equipment Download PDFInfo
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- CN101477322A CN101477322A CNA2009101048990A CN200910104899A CN101477322A CN 101477322 A CN101477322 A CN 101477322A CN A2009101048990 A CNA2009101048990 A CN A2009101048990A CN 200910104899 A CN200910104899 A CN 200910104899A CN 101477322 A CN101477322 A CN 101477322A
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- powder
- roller
- photosensitive drums
- developer roll
- carbon dust
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Abstract
The invention relates to an imaging device, which comprises a charging roller, a light-sensing drum, an exposure unit, a powder bin unit, a transfer printing roller and a fixing roller, wherein the powder bin unit comprises a powder bin, a powder outlet knife, a developing roller and a powder delivery roller; the charging roller applies positive voltage to the light-sensing drum; the exposure unit irradiates light beams provided with image signals on the surface of the light-sensing drum to form an electrostatic latent image; nonmagnetic single-component electropositive carbon powder in the powder bin is sent to the surface of the developing roller through the powder delivery roller, and a uniform carbon powder layer with uniform thickness is formed on the surface of the developing roller under the control of the powder outlet knife; the carbon powder is driven to have positive electricity through friction; the developing roller applies the positive voltage; the carbon powder is transferred to the light-sensing drum from the developing roller to form a visual carbon powder image under the action of developing bias voltage; the carbon powder image on the surface of the light-sensing drum is transferred to a piece of printing paper under the action of the transfer printing roller and the light-sensing drum, and fixed by the fixing roller; and after transfer printing, residual carbon powder on the light-sensing drum is recycled by the developing roller and utilized in subsequent development. The charging roller is adopted to charge the positive electricity to the light-sensing drum, so that not only the imaging device does not generate ozone and has low energy consumption but also the charging roller is difficult to damage and convenient to replace, thereby the technical problems that the prior imaging device can generate the ozone and has high energy consumption and a charging unit is easy to damage and difficult to replace are solved.
Description
Technical field
The present invention relates to a kind of image forming apparatus.
Background technology
Existing image forming apparatus is as using the negative electricity carbon dust in the duplicating machine that adopts xerox technology or electrostatic recording system or the printer etc., use corona wire to fill negative electricity to photosensitive drums, the corona wire charging is to utilize the corona wire ionized air, make photosensitive drum surface fill the electric charge of uniform predetermined polarity with, this brings more serious problem, and corona discharge produces a large amount of ozone.Disclosed a solution among the US575246: use corona wire to fill the generation that positive electricity reduces ozone to photosensitive drums.Yet use the corona charging need be up to the voltage of 5KV, and on the actual photosensitive drums with electricity be 600V-800V, charge efficiency is low, consumed energy is many; Corona wire is also disconnected easily, and the replacing corona wire is not easy.
Summary of the invention
The invention provides a kind of image forming apparatus, can produce the fragile and not easily changeable technical matters of ozone and charhing unit to solve the conventional images forming device.
In order to solve above technical matters, the technical scheme that the present invention takes is:
A kind of image forming apparatus, comprise handle box, exposing unit, transfer roll and fixing roller, described handle box comprises charhing unit, photosensitive drums and powder warehouse receipt unit, described powder warehouse receipt unit comprises the powder storehouse, the powder delivery cutter, developer roll and powder feeding roller, it is characterized in that, described charhing unit is a charging roller, described charging roller is that photosensitive drums applies voltage, the light beam irradiates that described exposing unit will have picture signal forms electrostatic latent image in photosensitive drum surface, non-magnetic mono-component charged toner in the described powder storehouse is delivered to the control that described powder delivery cutter is passed through on the developer roll surface again by powder feeding roller, form the uniform carbon dust layer of certain thickness in described developing roller surface, make carbon dust charged by friction, described developer roll applies voltage, and under the effect of development bias voltage, carbon dust is transferred to photosensitive drums from developer roll and becomes visible carbon dust image; Under the effect of described transfer roll and photosensitive drums, the carbon dust image transfer of photosensitive drum surface is to printer paper and through the fixing roller photographic fixing, and after the transfer printing, residual carbon pruinescence developer roll is recycled on the photosensitive drums.
Also comprise cleaning unit, described cleaning unit is a Clean Brush for cleaning, and described Clean Brush for cleaning is brushed the carbon dust on charging roller surface down, and reclaims by developer roll.
Described developer roll is by the flexible member resiliency supported, and elastic force forces described developer roll to move to described photosensitive drums, keeps interference fit thereby make between developer roll and the photosensitive drums.
Described charging roller is that photosensitive drums applies positive polarity voltage, the non-magnetic mono-component carbon dust positively charged in the described powder storehouse, and described friction makes the carbon dust positively charged, and described developer roll applies positive polarity voltage.
Described handle box both sides also are provided with two relative baffle plates, and described flexible member is separately positioned on the described two relative baffle plates.
Described flexible member is stage clip or extension spring.
After having adopted technique scheme, owing to adopted charging roller to fill positive electricity to photosensitive drums, therefore, not only do not produce ozone, it is low to consume energy, and charging roller is not fragile, is convenient to change, and has solved the conventional images forming device and can produce the fragile and not easily changeable technical matters of ozone, power consumption height and charhing unit.In addition, therefore not only simple in structure because cleaning unit has only been used Clean Brush for cleaning, and also the powder under the cleaning can utilize again; At last, because developer roll is by flexible member resiliency supported developer roll, elastic force forces developer roll to move to photosensitive drums, thereby make between developer roll and the photosensitive drums and keep interference fit, therefore surface in contact has great elasticity between photosensitive drums and the developer roll, it is less to wear and tear, and can not influence picture quality, makes serviceable life of handle box increase and causes the life-span of image forming apparatus to increase.
Description of drawings
Fig. 1 is an image processing system structural representation of the present invention;
Fig. 2 is the left view of image processing system of the present invention.
Fig. 3 is the partial enlarged drawing of the I part of Fig. 2.
Embodiment
As Fig. 1, shown in 2, a kind of image forming apparatus 101, comprise handle box 10, exposing unit 8, powder warehouse receipt unit, developer roll 4, transfer roll 7, fixation unit 156 and cleaning unit 3, handle box 10 comprises charhing unit, photosensitive drums and powder warehouse receipt unit, charhing unit is a charging roller 2, powder warehouse receipt unit comprises powder storehouse (not shown on the figure), powder delivery cutter 6, developer roll 4 and powder feeding roller 5, charging roller 2 applies positive polarity voltage for photosensitive drums 1, the light beam irradiates that exposing unit 8 will have picture signal forms the invisible electrostatic latent image of naked eyes in photosensitive drums 1 surface, non-magnetic mono-component positive electricity carbon dust in the powder storehouse is delivered to the control that powder delivery cutter 6 is passed through on developer roll 4 surfaces again by powder feeding roller 5, surface at developer roll 4 forms the uniform carbon dust layer of certain thickness, make the carbon dust positively charged by friction, developer roll 4 applies positive polarity voltage, under the effect of development bias voltage, carbon dust is transferred to photosensitive drums 1 from developer roll 4 and becomes visible carbon dust image; Under the effect of transfer roll 7 and photosensitive drums 1, the carbon dust image transfer on photosensitive drums 1 surface is to printer paper and through fixation unit 156 photographic fixing, cleaning unit is a Clean Brush for cleaning 3, under the carbon dust brush of Clean Brush for cleaning 3 with charging roller 2 surfaces, and by developer roll 4 recovery, equilibrium and stability that charging roller 2 charges for photosensitive drums 1 have been guaranteed like this, and the carbon dust that is brushed down is got back on photosensitive drums 1 surface, finally other the residual carbon dust with photosensitive drums 1 surface is developed roller 4 recyclings, thereby has improved the service efficiency of carbon dust greatly.Developer roll 4 is by flexible member 260 resiliency supported, and elastic force forces described developer roll 4 to move to described photosensitive drums 1, keeps interference fit thereby make between developer roll 4 and the photosensitive drums 1.
In charge step, photosensitive drums 1 is recharged the voltage that roller 2 is filled predetermined polarity with.Charging roller 2 applies positive polarity voltage V1, and like this, the photosensitive drums 1 that contacts with charging roller 2 is filled with the positive polarity voltage that approaches V1 numerical value.Because charging roller 2 is in contact with one another with photosensitive drums 1, so the electric charge of charging roller 2 directly is launched into the surface of photosensitive drums 1, and can the ionization ambient air, so do not produce ozone, and the charge efficiency height.Charging roller 2 by the baffle plate on the handle box 10 in the image processing system 101 110 with baffle plate 110 relative another baffle plates (not shown on the figure) on fixed bit 210 location, if change charging roller 2, only need take off the replacing that above-mentioned baffle plate can be realized charging roller.
In step of exposure, exposing unit 8, the light beam irradiates that will have picture signal are in photosensitive drums 1 surface, and territory, the non-exposed area voltage on photosensitive drums 1 surface remains unchanged, and the voltage of exposure area reduces, and therefore forms the invisible electrostatic latent image of naked eyes on photosensitive drums 1 surface.
In development step, the lip-deep electrostatic latent image that is formed on photosensitive drums 1 is become visible carbon dust image.The non-magnetic mono-component positive electricity carbon dust that is arranged in the powder storehouse is delivered to the control that powder delivery cutter 6 is passed through on developer roll 4 surfaces again by powder feeding roller 5, formed the uniform carbon dust layer of certain thickness on the surface of developer roll 4, and make the carbon dust positively charged by friction, developer roll 4 applies positive polarity voltage V2, under the effect of development bias voltage, carbon dust is transferred on the photosensitive drums 1 from developer roll 4, so above-mentioned electrostatic latent image becomes visible carbon dust image.For the picture quality that obtains, the location between developer roll 4 and the photosensitive drums 1 is most important, only guaranteed developer roll 4 and photosensitive drums 1 fully contact and contact force evenly constant, just can guarantee the efficient of developing.The present invention is by as Fig. 2, the 260 resiliency supported developer rolls 4 of flexible member shown in 3, and elastic force forces described developer roll 4 to move to described photosensitive drums 1, thereby makes and keep interference fit between developer roll 4 and the photosensitive drums 1.Come to introduce in detail the elasticity location of developer roll 4 below again.
Be illustrated in figure 3 as the left view of image processing system of the present invention, handle box 10 in the image processing system 101 has baffle plate 110, described baffle plate 110 is provided with: the fixed bit 230 of photosensitive drums 1, the support component 240 of development roll shaft 14a, the fixed bit 250 of flexible member 260 and powder feeding roller 5, this flexible member 260 is spring or stage clip, has on the baffle plate (not shown on the figure) of handle box 10 other ends and the identical said elements of baffle plate 110 symmetries.
The relative position of photosensitive drums 1 fixed bit 230 and powder feeding roller 5 fixed bits 250 remains constant in the image processing system course of work.Photosensitive drums 1 is fixed on the handle box 10 by the fixed bit 230 of the photosensitive drums 1 on baffle plate 110 and another baffle plate (not shown on the figure) relative with baffle plate 110; Powder feeding roller 5 goes up powder feeding roller 5 fixed bits 250 by baffle plate 110 with another baffle plate (not shown on the figure) relative with baffle plate 110 and is fixed on the handle box 10.Therefore, photosensitive drums 1 remains constant with the relative position of powder feeding roller 5.
Be illustrated in figure 3 as the partial enlarged drawing of I part among Fig. 2, developer roll 4 by support component 240 resiliency supported on baffle plate 110 and another baffle plate (not shown on the figure) relative with baffle plate 110 in image processing system, flexible member 260 applies elastic force for support component 240, the direction of this elastic force is pointed to photosensitive drums 1 along the line direction in photosensitive drums 1 and developer roll 4 axle center.
In transfer step, the carbon dust image transfer that is formed on photosensitive drums 1 surface is to printer paper P.As shown in Figure 2, the printer paper P in the paper disc 152 is sent transfer position along path C by paper-feed roll 154 by pickup roller 153.Apply negative polarity transfer voltage V3 to transfer roll 7, make the back side of printer paper P be filled with negative charge, the carbon dust image of negative charge and positive electricity attracts each other, thereby the carbon dust image is transferred on the printer paper P.Wherein after the transfer printing, the carbon dust that is not diverted on photosensitive drums 1 surface, reclaim (development-cleaning procedure) by developer roll 4, because of pressure between charging roller 2 and the photosensitive drums 1 adheres to the carbon dust on charging roller 2 surfaces, then clean by Clean Brush for cleaning 3, under the carbon dust brush of Clean Brush for cleaning 3 with charging roller 2 surfaces, return photosensitive drums 1 surface at last and reclaim by developer roll 4.Thus, can guarantee that charging roller 2 fills satisfied electromotive force with to photosensitive drum surface, thereby obtain preferable image.
In the photographic fixing step, be transferred to the carbon dust image on the printer paper P, under the effect of fixation unit 156, the carbon dust image is fixed on the printer paper P, pass through exit roller 158 again, the printer paper P that will have type information discharges image processing system.
Claims (6)
1, a kind of image forming apparatus, comprise handle box, exposing unit, transfer roll and fixing roller, described handle box comprises charhing unit, photosensitive drums and powder warehouse receipt unit, described powder warehouse receipt unit comprises the powder storehouse, the powder delivery cutter, developer roll and powder feeding roller, it is characterized in that, described charhing unit is a charging roller, described charging roller is that photosensitive drums applies voltage, the light beam irradiates that described exposing unit will have picture signal forms electrostatic latent image in photosensitive drum surface, non-magnetic mono-component charged toner in the described powder storehouse is delivered to the control that described powder delivery cutter is passed through on the developer roll surface again by powder feeding roller, form the uniform carbon dust layer of certain thickness in described developing roller surface, make carbon dust charged by friction, described developer roll applies voltage, and under the effect of development bias voltage, carbon dust is transferred to photosensitive drums from developer roll and becomes visible carbon dust image; Under the effect of described transfer roll and photosensitive drums, the carbon dust image transfer of photosensitive drum surface is to printer paper and through the fixing roller photographic fixing, and after the transfer printing, residual carbon pruinescence developer roll is recycled on the photosensitive drums.
2, image forming apparatus as claimed in claim 1 is characterized in that, also comprises cleaning unit, and described cleaning unit is a Clean Brush for cleaning, and described Clean Brush for cleaning is brushed the carbon dust on charging roller surface down, and reclaims by developer roll.
3, image forming apparatus as claimed in claim 1 is characterized in that, described developer roll is by the flexible member resiliency supported, and elastic force forces described developer roll to move to described photosensitive drums, keeps interference fit thereby make between developer roll and the photosensitive drums.
4, image forming apparatus as claimed in claim 1 is characterized in that, described charging roller is that photosensitive drums applies positive polarity voltage, the non-magnetic mono-component carbon dust positively charged in the described powder storehouse, and described friction makes the carbon dust positively charged, and described developer roll applies positive polarity voltage.
5. image forming apparatus as claimed in claim 3 is characterized in that, described handle box both sides also are provided with two relative baffle plates, and described flexible member is separately positioned on the described two relative baffle plates.
6. as claim 3 or 5 described image forming apparatus, it is characterized in that described flexible member is stage clip or extension spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101048990A CN101477322A (en) | 2009-01-09 | 2009-01-09 | Image formation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101048990A CN101477322A (en) | 2009-01-09 | 2009-01-09 | Image formation equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101477322A true CN101477322A (en) | 2009-07-08 |
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ID=40838053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009101048990A Pending CN101477322A (en) | 2009-01-09 | 2009-01-09 | Image formation equipment |
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| Country | Link |
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| CN (1) | CN101477322A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893838A (en) * | 2010-05-05 | 2010-11-24 | 珠海天威飞马打印耗材有限公司 | Processing box |
| CN101893836A (en) * | 2010-04-01 | 2010-11-24 | 珠海天威飞马打印耗材有限公司 | Processing box |
| CN102141769A (en) * | 2011-04-19 | 2011-08-03 | 珠海天威飞马打印耗材有限公司 | Processing box for laser printer |
| CN110928154A (en) * | 2019-12-13 | 2020-03-27 | 上海旷沃科技有限公司 | Voltage-based selenium drum service life detection method |
| WO2022262246A1 (en) * | 2021-06-16 | 2022-12-22 | 珠海天威飞马打印耗材有限公司 | Process cartridge and electronic imaging device |
-
2009
- 2009-01-09 CN CNA2009101048990A patent/CN101477322A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893836A (en) * | 2010-04-01 | 2010-11-24 | 珠海天威飞马打印耗材有限公司 | Processing box |
| CN101893836B (en) * | 2010-04-01 | 2011-11-16 | 珠海天威飞马打印耗材有限公司 | Processing box |
| CN101893838A (en) * | 2010-05-05 | 2010-11-24 | 珠海天威飞马打印耗材有限公司 | Processing box |
| CN102141769A (en) * | 2011-04-19 | 2011-08-03 | 珠海天威飞马打印耗材有限公司 | Processing box for laser printer |
| CN110928154A (en) * | 2019-12-13 | 2020-03-27 | 上海旷沃科技有限公司 | Voltage-based selenium drum service life detection method |
| WO2022262246A1 (en) * | 2021-06-16 | 2022-12-22 | 珠海天威飞马打印耗材有限公司 | Process cartridge and electronic imaging device |
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Open date: 20090708 |