CN203241701U - Developing roll in laser printer - Google Patents
Developing roll in laser printer Download PDFInfo
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- CN203241701U CN203241701U CN 201320230359 CN201320230359U CN203241701U CN 203241701 U CN203241701 U CN 203241701U CN 201320230359 CN201320230359 CN 201320230359 CN 201320230359 U CN201320230359 U CN 201320230359U CN 203241701 U CN203241701 U CN 203241701U
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- magnetic
- elastomer layer
- metal shaft
- magnetosphere
- core
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- Magnetic Brush Developing In Electrophotography (AREA)
Abstract
The utility model discloses a developing roll in a laser printer. The developing roll comprises a magnetic core, wherein the magnetic core consists of a metal shaft core and a magnetic layer fixedly arranged on the metal shaft core, a plurality of magnetic electrodes are arranged on the magnetic layer, an elastomer layer made of conductive materials is wrapped on the magnetic core, and the metal shaft core and the elastomer layer are electrically connected. As the magnetic electrodes are additionally arranged inside the traditional rubber developing roll, the surface of the elastomer layer has certain magnetic field intensity, magnetic single-component carbon powder can be adsorbed on the surface of the elastomer layer of the developing roll, so that a powder delivery roll is not needed to be used for delivering powder so as to further reduce the rotating torque, on the other hand, the magnetic field power stressed by the carbon powder is beneficial to sealing of powder, therefore, the risk of leaking the powder can be greatly reduced. Compared with the developing roll in which the elastomer layer is wrapped outside an aluminum pipe of the magnetic roll, the technique requires that a rubber layer with the thickness of less than 2mm is wrapped outside the thin-wall aluminum pipe with 0.8-1.5mm, the technical difficulty is large, and the aluminum pipe is easily deformed to cause the quality problem in the transmission process.
Description
Technical field
The utility model relates to a kind of developer roll, particularly the developer roll in a kind of laser printer.
Background technology
In the existing laser printing technology, come minute to have two kinds by mode: a kind of is the contact type developing mode, and another kind is non-contact type developing mode.
Contact type developing mode principle of work is: developer roll mostly is metal-cored rubber roll, very large bulk resistor is arranged, directly contact with developer roll by photosensitive drums, charged toner on the developer roll is adsorbed on the graphics field and video picture by electric field force, this mode must have the powder feeding roller of porous to contact with developer roll, therefore moment of torsion is large, and because carbon dust is not subject to magnetic field force, thereby be transported in the process of photosensitive drums by the powder storehouse at this carbon dust, easily fly out from developer roll, therefore be easy to cause the Lou situation of powder, thereby require very high to powder storehouse sealed junction, need in toner cartridge, paste felt, the sealing scraping blade, for fear of the problems referred to above, the applicant had designed a kind of developer roll that solves the problems of the technologies described above (patent No.: 201120025866.X title: a kind of developing apparatus of carrying magnetic rubber roll) in the past, but there is defective in said structure, this developer roll is because be the aluminium pipe structure of shell, thickness is 0.8-1.5mm approximately, in establish magnetic pole, magnetic pole maintains static moving, and requires thin-wall aluminium pipe outsourcing one deck at about 0.8-1.5mm less than the thick rubber layer of 2mm, technology difficulty is very big, and aluminum pipe very easily is out of shape and causes quality problem in transmission process.
Thereby the design people has designed a kind of novel band magnetic rubber roll now, and it cooperates the work of magnetic carbon dust, when powder feeding, can strengthen the magnetic carbon dust to the adhesion of developer roll by magnetic field force, thereby guarantee that the magnetic carbon dust is difficult for flying out from developer roll, thereby greatly simplified hermetically-sealed construction, need not paste felt, the sealing scraping blade, and the steady product of quality, to save manually, bisque is thin, controllability is strong, and has avoided the problem of aluminum pipe distortion.
The utility model content
In order to overcome the deficiencies in the prior art, the utility model provides the developer roll in a kind of new laser printer, can significantly reduce driving torque by this developer roll, simplify hermetically-sealed construction, need not paste felt, the sealing scraping blade, and the steady product of quality, to save manually, bisque is thin, controllability is strong, and has avoided the problem of aluminum pipe distortion.
The technical scheme that its technical matters that solves the utility model adopts is:
Developer roll in a kind of laser printer, it is characterized in that: comprise magnetic core, this magnetic core comprises the metal shaft core and is fixed in magnetosphere on the metal shaft core, magnetosphere is provided with some magnetic poles, be enclosed with the elastomer layer that conductive material is made on the described magnetic core, and metal shaft core and elastomer layer electric connection.
Described magnetosphere is the magnetosphere that conductive material is made, and described metal shaft core is electrically connected by this magnetosphere and elastomer layer, and described elastomer layer is wrapped on the described magnetosphere.
Described metal shaft core comprises a circular shaft and is arranged at divider on the circular shaft, be fixed with magnetic stripe between two dividers, described magnetosphere is made of magnetic stripe, and the outside surface of described divider and magnetic stripe is coated with the elastomer layer that described conductive material is made, and described magnetic pole is arranged on the magnetic stripe.
Described metal shaft core comprises the mounting hole that is arranged at the metal shaft in-core, is provided with magnetic stripe in the mounting hole, and described magnetosphere is made of magnetic stripe, is coated with the elastomer layer that described conductive material is made on the described metal shaft core, and described magnetic pole is arranged on the magnetic stripe.
Described magnetospheric body resistivity is 10
3-10
11Ω cm.
The body resistivity of described elastomer layer is 10
3-10
11Ω cm.
The thickness of described elastomer layer is 0.5-5mm.
The magnetic induction density of described magnetic pole is 500-2000Gs.
The beneficial effects of the utility model are: owing to having added magnetic pole in traditional rubber developer roll inside, therefore has certain magnetic field intensity on the elastomer layer surface, the magnetic mono-component carbon dust will be adsorbed to the elastomer layer surface of developer roll, thereby just do not need to come powder feeding with powder feeding roller, and then the moment of torsion of minimizing rotation, on the other hand because carbon dust has been subject to magnetic field force, and this power helps to seal powder, therefore can greatly reduce the risk of leaking powder, need not paste felt, the sealing scraping blade, and the steady product of quality, to save manually, bisque is thin, controllability is strong, and the coated elastomer rubber layer causes technology difficulty large outside having solved magnetic roller aluminium pipe, aluminum pipe very easily is out of shape the problem that causes print quality to reduce in transmission process.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the cross sectional view of embodiment one of the present utility model;
Fig. 2 is the cross sectional view of embodiment two of the present utility model;
Fig. 3 is the cross sectional view of embodiment three of the present utility model.
Embodiment
The utility model discloses the developer roll in a kind of laser printer, comprise magnetic core, this magnetic core comprises metal shaft core 1 and is fixed in magnetosphere 2 on the metal shaft core 1, magnetosphere 2 is provided with some magnetic poles, be enclosed with the elastomer layer 3 that conductive material is made on this magnetic core, and metal shaft core 1 is electrically connected with elastomer layer 3.
With reference to Fig. 1, Fig. 1 is the cross sectional view of the utility model specific embodiment one, and core is that a metal round roller is as the metal shaft core 1 of this developer roll, for carrying the developer roll remaining part and remaining part can both being rotated with metal shaft core 1 in the middle of it; These metal shaft core 1 preferred steel, certainly also other metal, such as aluminium, copper etc., metal shaft core 1 is coated with one deck magnetosphere 2, this magnetosphere 2 (also can adopt the mode of other modes as adopting magnetic stripe to paste) by the mold integral injection moulding certainly on metal shaft core 1, this mode forming, cost is low, this magnetosphere 2 is provided with four magnetic poles, certainly the number of magnetic pole is not construed as limiting the utility model yet, also can be sextupole, or the ends of the earth etc., in this example, magnetosphere 2 needs conduction, thereby in this example, magnetosphere 2 adopts special material to make, this material comprises the nylon mixed ferrite and the electrically conductive graphite powder consists of, its part by weight is, nylon: ferrite: electrically conductive graphite powder or conductive black=0.5-1.5:7-9:0.5-1.5, optimum ratio, nylon: ferrite: electrically conductive graphite powder or conductive black=1:8:1, thereby not only can magnetize, can also conduct electricity, and elastomer layer 3 coats and is fixed on the outside of described magnetosphere 2, and can rotate with described metal shaft core 1 and described magnetic field generating apparatus, this elastomer layer 3 is also made for conductive material, thereby after 1 energising of metal shaft core, the impressed voltage that puts on the metal shaft core 1 can be conducting on the elastomer layer 3 by magnetosphere 2, certainly, elastomer layer 3 can be made of elastomeric material hybrid conductive carbon black or dag, and elastomeric material can adopt silica gel, PU glue, butadiene acrylonitrile rubber etc., also plastic cement or other macromolecular material, the magnetic mono-component carbon dust that is adsorbed onto elastomer layer 3 surfaces when magnetosphere 2 is after forming conforming layer by control powder device, and developer roll rotates and the magnetic mono-component carbon dust is sent to developing location and current potential sub-image that photosensitive drum surface is formed develops, and more unnecessary carbon dust is taken back the powder storehouse.
Preferred as this example, the body resistivity of magnetosphere 2 is 10
3-10
11Ω cm, certainly, the body resistivity of magnetosphere 2 is lower, and its conductive effect is better, and still, the shared ratio of electrically conductive graphite powder or conductive black just needs larger, and this moment, ferritic ratio must reduce, thereby cause again magnetic field force to reduce; And the body resistivity of magnetosphere 2 is higher, and its conductive capability is just less certainly, does not reach again the required effect of this developer roll, thereby process the design people's test of many times, and its numerical value is 10
3-10
11Could satisfy all requirements in the Ω cm.
Preferred as this example, the body resistivity of elastomer layer 3 is 10
3-10
11Ω cm, certainly, the body resistivity of elastomer layer 3 is lower, and its conductive effect is better, and still, the shared ratio of electrically conductive graphite powder just needs larger, and the elasticity of the electrically conductive graphite powder is many elastomer layer 3 must reduce, and the hardness of roller can increase greatly; And the body resistivity of elastomer layer 3 is higher, and its conductive capability is just less certainly, does not reach again the required effect of this developer roll, thereby process the design people's test of many times, and its numerical value is 10
3-10
11Could satisfy all requirements in the Ω cm.
Preferred as this example, the thickness of elastomer layer 3 is 0.5-5mm, elastomer layer 3 thickness are too thick, the distance that is attached to magnetic carbon dust on the elastomer layer 3 and magnetosphere 2 is far away, can greatly weaken the absorption affinity of magnetic carbon dust, causes the magnetic carbon dust easily to fly out from roller, and it is too thin, difficulty is large on the technique, thereby through test, the thickness of elastomer layer 3 is that 0.5-5mm is best.
Preferred as this example, the magnetic induction density of magnetic pole is 500-2000Gs, for this structure, larger numerical value of magnetic induction density needs of magnetic pole could adsorb the magnetic carbon dust on the elastomer layer 3 well, thereby it has the minimum of a test, but be subjected to materials limitations, magnetic induction density is limited, thereby it has a mxm..
With reference to Fig. 2, Fig. 2 is the cross sectional view of the utility model specific embodiment two, this embodiment two is with the difference of embodiment one, metal shaft core 1 comprises a circular shaft 4 and is arranged at divider 5 on the circular shaft 4,5 of two dividers are fixed with magnetic stripe 6, magnetic stripe 6 is bonded on the metal shaft core 1 by glue, magnetosphere 2 is made of magnetic stripe 6, the outside surface of divider 5 and magnetic stripe 6 is coated with the elastomer layer 3 that described conductive material is made, magnetic pole is arranged on the magnetic stripe 6, in the said structure, metal shaft core 1 can directly contact with elastomer layer 3 by divider 5, thereby magnetosphere 2 can make without conductive material, can be directly in purchasing on the market common core material, thereby convenient buying.
With reference to Fig. 3, Fig. 3 is the cross sectional view of the utility model specific embodiment three, this embodiment three is with the difference of embodiment one, metal shaft core 1 comprises the mounting hole that is arranged in the metal shaft core 1, be provided with magnetic stripe 6 in the mounting hole, described magnetosphere 2 is made of magnetic stripe 6, be coated with the elastomer layer 3 that described conductive material is made on the described metal shaft core 1, described magnetic pole is arranged on the magnetic stripe 6, in the said structure, the outside surface of metal shaft core 1 can directly contact with elastomer layer 3 fully, thereby magnetosphere 2 can make without conductive material, can be directly in purchasing on the market common core material, thereby convenient buying, and compare and only depend on divider 5 to contact with elastomer layer 3 among the embodiment two, this structural metal axle core 1 is larger with elastomer layer 3 surface of contact, and conductive effect is better.
In sum: the utility model is owing to having added magnetic pole in rubber layer inside, and magnetic pole can rotate synchronously with rubber layer, different from traditional magnetic pole use-pattern, magnetic pole maintained static when traditional approach all was work, rotated work by aluminum pipe or aluminum pipe and outer field elastomer layer 3.Although this kind structure exists because magnetic pole is moving in not stall, and the magnetic field force that the carbon dust on the developing location is subject to has fluctuation, this does not affect print quality.Because:
1, this developer roll also the complexed metal cutter control powder, therefore can be controlled at the carbon dust layer on elastomer layer 3 surfaces approximately about 0.01mm because the elastic force of metal is large, therefore the difference that picture adopts surperficial obvious " magnetic fringe " Qu Yufei " magnetic fringe " district that occurs of magnetic roller of the development of beating can not occur, the instability that is therefore caused by " magnetic fringe " can be got rid of.
2, because the carbon dust layer is very thin, so the frictional electrification efficient of carbon dust and steel edge is high, and basic all carbon dusts are all with very high electric charge behind powder outlet cutter, and at this moment carbon powder particle is subjected to having the greatest impact of electric field force, and the impact of magnetic field force then reduces greatly.
3, number of magnetic poles is more, and the influence of fluctuations that magnetic pole produces is less, and the number of magnetic poles general control is at the 4-10 utmost point in the reality, and the magnetic field intensity between every utmost point can be too not low yet, so the fluctuation of magnetic pole is also little on the impact of quality.
In summary it can be seen, magnetic core ceaselessly rotates the magnetic carbon dust that causes when work although this kind structure might exist has fluctuation at the magnetic field force that developing location is subject to, but this fluctuation does not cause the substantial effect to print quality in this kind structure, experimental result has also proved this result.
Developer roll in above a kind of laser printer that the utility model embodiment is provided, be described in detail, used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (8)
1. the developer roll in the laser printer, it is characterized in that: comprise magnetic core, this magnetic core comprises the metal shaft core and is fixed in magnetosphere on the metal shaft core, magnetosphere is provided with some magnetic poles, be enclosed with the elastomer layer that conductive material is made on the described magnetic core, and metal shaft core and elastomer layer electric connection.
2. the developer roll in a kind of laser printer according to claim 1, it is characterized in that: described magnetosphere is the magnetosphere that conductive material is made, described metal shaft core is electrically connected by this magnetosphere and elastomer layer, and described elastomer layer is wrapped on the described magnetosphere.
3. the developer roll in a kind of laser printer according to claim 1, it is characterized in that: described metal shaft core comprises a circular shaft and is arranged at divider on the circular shaft, be fixed with magnetic stripe between two dividers, described magnetosphere is made of this magnetic stripe, the outside surface of described divider and magnetic stripe is coated with the elastomer layer that described conductive material is made, and described magnetic pole is arranged on the magnetic stripe.
4. the developer roll in a kind of laser printer according to claim 1, it is characterized in that: described metal shaft core comprises the mounting hole that is arranged at the metal shaft in-core, be provided with magnetic stripe in the mounting hole, described magnetosphere is made of magnetic stripe, be coated with the elastomer layer that described conductive material is made on the described metal shaft core, described magnetic pole is arranged on the magnetic stripe.
5. the developer roll in a kind of laser printer according to claim 2, it is characterized in that: described magnetospheric body resistivity is 10
3-10
11Ω cm.
6. the developer roll to 4 arbitrary described a kind of laser printers according to claim 1, it is characterized in that: the body resistivity of described elastomer layer is 10
3-10
11Ω cm.
7. the developer roll to 4 arbitrary described a kind of laser printers according to claim 1, it is characterized in that: the thickness of described elastomer layer is 0.5-5mm.
8. the developer roll to 4 arbitrary described a kind of laser printers according to claim 1, it is characterized in that: the magnetic induction density of described magnetic pole is 500-2000Gs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320230359 CN203241701U (en) | 2013-04-28 | 2013-04-28 | Developing roll in laser printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320230359 CN203241701U (en) | 2013-04-28 | 2013-04-28 | Developing roll in laser printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203241701U true CN203241701U (en) | 2013-10-16 |
Family
ID=49318976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320230359 Expired - Fee Related CN203241701U (en) | 2013-04-28 | 2013-04-28 | Developing roll in laser printer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203241701U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103246190A (en) * | 2013-04-28 | 2013-08-14 | 珠海市奔码打印耗材有限公司 | Developing roller used in laser printer |
| CN104693808A (en) * | 2015-03-16 | 2015-06-10 | 珠海天威飞马打印耗材有限公司 | Developing roller and manufacturing method thereof |
-
2013
- 2013-04-28 CN CN 201320230359 patent/CN203241701U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103246190A (en) * | 2013-04-28 | 2013-08-14 | 珠海市奔码打印耗材有限公司 | Developing roller used in laser printer |
| WO2014176851A1 (en) * | 2013-04-28 | 2014-11-06 | 珠海市奔码打印耗材有限公司 | Developing roller in laser printer |
| CN104693808A (en) * | 2015-03-16 | 2015-06-10 | 珠海天威飞马打印耗材有限公司 | Developing roller and manufacturing method thereof |
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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: 20131016 Termination date: 20150428 |
|
| EXPY | Termination of patent right or utility model |