CN201945809U - Developing device of laser printer - Google Patents
Developing device of laser printer Download PDFInfo
- Publication number
- CN201945809U CN201945809U CN2011200418029U CN201120041802U CN201945809U CN 201945809 U CN201945809 U CN 201945809U CN 2011200418029 U CN2011200418029 U CN 2011200418029U CN 201120041802 U CN201120041802 U CN 201120041802U CN 201945809 U CN201945809 U CN 201945809U
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- CN
- China
- Prior art keywords
- developer roll
- photosensitive drum
- photosensitive drums
- attached
- laser printer
- Prior art date
- 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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- Dry Development In Electrophotography (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
Abstract
The utility model discloses a developing device of a laser printer, which comprises a photosensitive drum in a selenium drum and a developing roller which can be attached with magnetic carbon powder, wherein the photosensitive drum is internally provided with one or a plurality of permanent magnets, the magnetic powder attached to the surface of the developing roller can be attached to the surface of the photosensitive drum by the permanent magnets, and the distance d between the photosensitive drum and the developing roller is more than 0mm and less than 0.4mm. The photosensitive drum is provided with at least one magnet and the magnetic powder attached to the surface of the developing roller can be attached to the surface of the photosensitive drum by the permanent magnets. Therefore, the developing roller and the photosensitive drum in the developing device can develop images without contacting with each other, and the abrasion caused by frication and big rotation torque is voided, the manufacturing accuracy and manufacturing cost to each component is reduced and the printing quality is improved.
Description
Technical field
The utility model relates to a kind of toner cartridge of laser printer, the developing apparatus in particularly a kind of toner cartridge.
Background technology
The contact visualization way is wherein a kind of main visualization way of laser printing.Laser printer such as Samsung and brother has adopted this visualization way mostly, and color printers such as Hewlett-Packard, Canon have also adopted this kind technology.
With the Samsung is example, and a bigger powder storehouse is arranged usually, interiorly with puddle support carbon dust is continuously flowed to powder feeding roller, because developer roll must lean on the continuous turning handle carbon dust of powder feeding roller to deliver to above it.Therefore powder feeding roller is many with there being the porosint of certain resistance to make.When the voltage of giving powder feeding roller with pact-500v, can make carbon dust generate electronegativity.Developer roll mostly is metal-cored rubber roll, and very big bulk resistor is arranged, and imposes-during the voltage of 300v, will transfer on the high developer roll of relative current potential for the charged toner on the powder roller to it.Elastic metallic scraper and developer roll keep minimum gap, and it also is subjected to an alternating voltage, can constantly make the carbon dust activation and it is spread to very thin one deck uniformly in the concussion.And photosensitive drums can obtain under charging roller-1400V high pressure effect-surface voltage of 800V, exposure back visuals current potential is reduced to – 50V (this is a rest potential), but not visuals (white area) Bao Chi – 800V current potential still, the ink powder Bei – 800V of Yue – 300V repels Shang the developer roll, but can be attracted and video picture by-50V, this is a developing process.This visualization way requires photosensitive drums directly to contact with developer roll, and bigger to the damage of photosensitive drums, driving torque is also big, and each parts accuracy requirement height causes the cost of manufacture height simultaneously, and print quality is also unstable.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of moment of torsion little, job stability height, the developing apparatus of the laser printer that cost is low.
The technical scheme that its technical matters that solves the utility model adopts is:
The developing apparatus of laser printer, comprise the photosensitive drums and the surperficial developer roll that can adhere to the magnetic carbon dust that are arranged in the toner cartridge, it is characterized in that: be provided with at least one permanent magnet in the described photosensitive drums, magnetic carbon dust attached to the developer roll surface can be attached to photosensitive drum surface by the permanent magnet effect, and the spacing d of photosensitive drums and developer roll is 0＜d＜0.4mm.
The spacing d of photosensitive drums and developer roll is 0.2mm.
Described developer roll can be rubber rollers.
Described developer roll can be the aluminium roller.
The beneficial effects of the utility model are: be provided with at least one permanent magnet in the photosensitive drums of the present utility model, can be attached to photosensitive drum surface by permanent magnet attached to the magnetic carbon dust on developer roll surface.Therefore developer roll and photosensitive drums needn't contact and just can realize development in the developing apparatus of this structure, the wearing and tearing that brought and big driving torque have been avoided being in contact with one another, thereby the manufacturing accuracy that has reduced each parts has simultaneously also reduced cost of manufacture, has improved print quality.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified:
Fig. 1 is an one-piece construction synoptic diagram of the present utility model.
Embodiment
With reference to Fig. 1, the utility model discloses a kind of developing apparatus of laser printer, comprise the photosensitive drums 1 and the surperficial developer roll 2 that can adhere to magnetic carbon dust 3 that are arranged in the toner cartridge, be provided with at least one permanent magnet 4 in the photosensitive drums 1, magnetic carbon dust 3 attached to developer roll 2 surfaces can be attached to photosensitive drums 1 surface by permanent magnet 4 effects, and the spacing d of photosensitive drums and developer roll is 0＜d＜0.4mm.
As shown in the figure, in present embodiment, be provided with a permanent magnet 4 in the photosensitive drums 1, this permanent magnet 4 be positioned at photosensitive drums 1 under, above-mentioned position only is an optimum position of present embodiment, certainly this permanent magnet 4 also can be positioned at other position that photosensitive drums 1 can attract magnetic carbon dust 3, be provided with developer roll 2 under the photosensitive drums 1, photosensitive drums 1 is 0.2mm with the spacing of developer roll 2, certainly, photosensitive drums 1 is to be the arbitrary numerical value in 0 to 0.4mm with the spacing of developer roll 2 in the utility model, developer roll 2 has adopted rubber rollers, the below of developer roll 2 also is provided with a powder feeding roller 5 and powder storehouse 6, and magnetic carbon dust 3 is housed in the powder storehouse 6, is provided with an elastic metallic scraper that contacts with developer roll 2 in the toner cartridge.
Below be another embodiment of the present utility model, this embodiment and a last embodiment difference are that developer roll 2 has adopted the aluminium roller, and what contact with developer roll 2 can be the elastic metallic scraper, certainly metallic spatula is preferred in this structure, the also available elastic caoutchouc scraper of this structure.
Certainly, above-mentioned only is that part embodiment is illustrated and describes, but embodiment of the present utility model is not restricted to the described embodiments, such as developer roll of the present utility model 2 can also adopt magnetic roller etc.
The course of work of this device is as follows: magnetic carbon dust 3 is adsorbed onto on the developer roll 2 from powder storehouse 6 by powder feeding roller 5, the scraper that contacts with developer roll 2 spreads to magnetic carbon dust 3 uniformly very thin one deck and makes magnetic carbon dust 3 be with electric charge, being added with a value on developer roll 2 is 300 left and right sides voltages, this voltage can guarantee that charged magnetic carbon dust 3 can be adsorbed onto developer roll 2 surfaces, prevents " fly powder " situation take place.
When magnetic carbon dust 3 is developed roller 2 and drives certain position, thereby the attraction that is subjected to the motionless permanent magnet 4 of photosensitive drums 1 internal fixation overcomes on the developer roll constraint of electric field force and jumps to photosensitive drums 1 surface, because of the non-graph area of photosensitive drum surface have very high and electrically with the magnetic carbon dust electrically charged electrical identical electric charge, thereby itself and magnetic carbon dust electrically chargedly can produce very big repulsive force each other and offset the magnetic field force that permanent magnet and magnetic carbon dust produce, and make the magnetic carbon dust can not be adsorbed on the non-graph area of photosensitive drum surface; But the voltage of the graph area after the exposure is very low, and the electric field force that is produced can't overcome the effect of magnetic field force, thereby magnetic carbon dust 3 can evenly be adsorbed on the graph area formation development on photosensitive drums 1 surface in photosensitive drums 1 rotating process.
Above-mentionedly just preferred embodiments more of the present utility model are illustrated and describe; but embodiment of the present utility model is not restricted to the described embodiments; as long as it reaches technique effect of the present utility model with essentially identical means, all should belong to protection domain of the present utility model.
Claims (4)
1. the developing apparatus of laser printer, comprise the photosensitive drums and the surperficial developer roll that can adhere to the magnetic carbon dust that are arranged in the toner cartridge, it is characterized in that: be provided with at least one permanent magnet in the described photosensitive drums, magnetic carbon dust attached to the developer roll surface can be attached to photosensitive drum surface by the permanent magnet effect, and the spacing d of photosensitive drums and developer roll is 0＜d＜0.4mm.
2. the developing apparatus of laser printer according to claim 1, it is characterized in that: the spacing d of photosensitive drums and developer roll is 0.2mm.
3. the developing apparatus of laser printer according to claim 1 and 2, it is characterized in that: described developer roll can be rubber rollers.
4. the developing apparatus of laser printer according to claim 1 and 2, it is characterized in that: described developer roll can be the aluminium roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200418029U CN201945809U (en) | 2011-02-18 | 2011-02-18 | Developing device of laser printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200418029U CN201945809U (en) | 2011-02-18 | 2011-02-18 | Developing device of laser printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201945809U true CN201945809U (en) | 2011-08-24 |
Family
ID=44473146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200418029U Expired - Fee Related CN201945809U (en) | 2011-02-18 | 2011-02-18 | Developing device of laser printer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201945809U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102073250A (en) * | 2011-02-18 | 2011-05-25 | 珠海市奔码打印耗材有限公司 | Developing device of laser printer |
| WO2013097321A1 (en) * | 2011-12-29 | 2013-07-04 | 珠海市奔码打印耗材有限公司 | Developing device with two developing rollers |
-
2011
- 2011-02-18 CN CN2011200418029U patent/CN201945809U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102073250A (en) * | 2011-02-18 | 2011-05-25 | 珠海市奔码打印耗材有限公司 | Developing device of laser printer |
| WO2012109838A1 (en) * | 2011-02-18 | 2012-08-23 | 珠海市奔码打印耗材有限公司 | Developing device for laser printer |
| WO2013097321A1 (en) * | 2011-12-29 | 2013-07-04 | 珠海市奔码打印耗材有限公司 | Developing device with two developing rollers |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110824 Termination date: 20140218 |