CN2924594Y - Developing unit for laser printer - Google Patents
Developing unit for laser printer Download PDFInfo
- Publication number
- CN2924594Y CN2924594Y CN 200620061170 CN200620061170U CN2924594Y CN 2924594 Y CN2924594 Y CN 2924594Y CN 200620061170 CN200620061170 CN 200620061170 CN 200620061170 U CN200620061170 U CN 200620061170U CN 2924594 Y CN2924594 Y CN 2924594Y
- Authority
- CN
- China
- Prior art keywords
- developer
- supply roller
- scraping blade
- developing apparatus
- roll
- 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)
Abstract
The utility model provides a developing device applied to a laser printer, which comprises a developer container accommodating developing agent, a developing roller for carrying and transporting the developing agent, a developer-supply roller for supplying developing agent to the developing roller and a scraper which is elastic contacted with and can scrape the developing agent sticking on the developer-supply roller, Wherein the scraper has a bent part elastically contacting with the developer-supply roller. The developing device can avoid effectively the printing defects caused by not enough developing agent supply.
Description
Technical field
The utility model relates to a kind of developing apparatus that is used for device for image forming, and described developing apparatus adheres to developer and develops on the electrostatic latent image that is formed on the image-carrier.
Background technology
Usually, developing apparatus has developer roll, developer reservoir, developer supply roller and adjusting blade etc.Wherein, developer supply roller has function from developer to developer roll that transmit, developer roll has the function of bearing developer, and with relative configuration of photoreceptor in the image processing system, thereby can utilize developer rightly the sub-image that is formed on the photoreceptor to be developed.Regulate blade and developer roll Elastic Contact and make electric charge on the developer band that is carried on the developer roll, and regulate the bed thickness that is carried on the developer on the developer roll.Developer supply roller and developer roll are installed in the lower area of developer reservoir with contactless state, in order to make the developer on the developer supply roller be delivered to developer roll, normally the side at the close developer roll of developer supply roller is provided with a scraping blade, one end of scraping blade is installed in developer reservoir inside, the other end and developer supply roller Elastic Contact, scraping blade scrapes the developer that is carried on the developer supply roller in the developer supply roller rotation, the developer that is scraped is deposited in a side of developer roll, to guarantee having enough developer feedings to give developer roll.
Referring to Fig. 1, existing laser printer developing apparatus 1 ', comprise developer reservoir 11 ', be arranged on puddle support 12 ' in the developer reservoir 11 ', developer supply roller 14 ', with the discontiguous developer roll 17 ' of developer supply roller, control developer roll 17 ' on the adjusting blade 18 ' of developer thickness, be used to seal developer roll 17 ' both ends, the seal 16 ' of anti-leak-stopping developer.Puddle support 12 ' is stored in developer 13 ' in the developer reservoir 11 ' by stirring, and developer 13 ' is sent on the developer supply roller 14 '.Be provided with the scraping blade 15 ' of a sheet near a side of developer roll 17 ' at developer supply roller 14 ', one end of scraping blade 15 ' sticks on the interior diapire of developing apparatus 1 ', an other end and donor rollers 14 ' Elastic Contact, scrape the developer that is carried on the developer supply roller, the developer that is scraped is deposited in a side of developer roll 17 '.
But, since the scraping blade 15 ' of sheet and the end intensity of developer supply roller 14 ' Elastic Contact too a little less than, the outside surface of developer supply roller 14 ' carrying transmission developer is made by metal material simultaneously, the poor-performing of developer is transmitted in its rotation, in printing middle and later periods of developing apparatus 1 ' during along with the running out gradually of developer, developer supply roller 14 ' can't carry enough developer levels, simultaneously, scraping blade can't scrape abundant developer, thereby causes print defect.
Summary of the invention
The purpose of this utility model is to provide a kind of developing apparatus, developer supply roller in this developing apparatus can provide enough developers to developer roll by the scraping blade of bending, thereby has avoided effectively in print procedure because of the not enough print defect that causes of developer transmission.
The developing apparatus that the utility model provides comprises: developer reservoir is used for receiving photographic developer; Developer roll is used to carry and transports described developer; Developer supply roller is used for described developer replenishing to described developer roll; Scraping blade with described developer supply roller Elastic Contact, and can scrape the developer on the described developer supply roller.Wherein, described scraping blade has a sweep, described sweep and developer supply roller Elastic Contact.
According to technique scheme, the intensity of the sweep of scraping blade is greater than the intensity of the non-sweep of scraping blade, so, when the sweep of scraping blade and developer supply roller Elastic Contact, can scrape the developer that is carried in a large number on the developer supply roller, thereby provide enough developer levels to developer roll, prevent print defect.Simultaneously, when the sweep of scraping blade contacts with developer supply roller, can also prevent scraping blade scratch developer supply roller.
Description of drawings
Fig. 1 is the sectional view of existing developing apparatus main structural components;
Fig. 2 is the partial structurtes exploded view of the utility model developing apparatus;
Fig. 3 is the left view of the utility model developing apparatus scraping blade;
Fig. 4 is the sectional view of the utility model developing apparatus main structural components.
Embodiment
Referring to Fig. 2, Fig. 3, the utility model developing apparatus 1 comprises the developer reservoir 11 that is used for receiving photographic developer 13, be used to carry and transport the developer roll 17 of described developer, be used for the developer supply roller 14 of described developer replenishing to described developer roll, with be arranged on developer reservoir 11 inside, be used to stir and transmit the puddle support 12 of developer.Above developer roll 17, be provided with one and regulate blade 18, be used to control the thickness of developer on developer roll 17 outside surfaces.Be provided with seal 16 at the two ends of developer roll 17, be used to prevent that developer from leaking from these two ends.
Referring to Fig. 4, the radius of corner of the sweep 151 of scraping blade 15 equals 0.2 millimeter the best more than or equal to 0.1 millimeter, and this sweep makes scraping blade form an acute angle on xsect, and acute angle is 30 degree in this example.Sweep 151 can be avoided scratch developer supply roller 14, can increase the intensity of scraping blade 15 and developer supply roller 14 contact positions.Scraping blade 15 adopts polyethylene terephthalate materials to make, and also can adopt other metal material to make.Developer supply roller 14 is made up of a metal shaft and the cavernous body that is enclosed within on the described metal shaft outside surface, and described sponge physical efficiency increases the amount that developer supply roller 14 carries developer.The magnitude of interference greater than 0.1mm is arranged between scraping blade 15 sweeps and the developer supply roller, can scrape the required developer level of developing roller 17, thereby effectively avoided in print procedure because of the not enough print defect that causes of developer transmission to guarantee scraping blade 15.
Claims (3)
1, laser printer developing apparatus comprises:
Developer reservoir is used for receiving photographic developer;
Developer roll is used to carry and transports described developer;
Developer supply roller is used for described developer replenishing to described developer roll;
Scraping blade with described developer supply roller Elastic Contact, and can scrape the developer on the described developer supply roller;
It is characterized in that:
Described scraping blade has a sweep, described sweep and developer supply roller Elastic Contact.
2, laser printer developing apparatus according to claim 1 is characterized in that:
The radius of corner of described sweep is more than or equal to 0.1 millimeter.
3, laser printer developing apparatus according to claim 1 and 2 is characterized in that:
It is an acute angle that described sweep makes the knuckle that forms on the scraping blade xsect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620061170 CN2924594Y (en) | 2006-06-27 | 2006-06-27 | Developing unit for laser printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620061170 CN2924594Y (en) | 2006-06-27 | 2006-06-27 | Developing unit for laser printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2924594Y true CN2924594Y (en) | 2007-07-18 |
Family
ID=38261025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620061170 Expired - Fee Related CN2924594Y (en) | 2006-06-27 | 2006-06-27 | Developing unit for laser printer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2924594Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103946752A (en) * | 2011-11-29 | 2014-07-23 | 佳能株式会社 | Developing device, cartridge and electrophotographic image forming apparatus |
-
2006
- 2006-06-27 CN CN 200620061170 patent/CN2924594Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103946752A (en) * | 2011-11-29 | 2014-07-23 | 佳能株式会社 | Developing device, cartridge and electrophotographic image forming apparatus |
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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: 20070718 |