CN2872420Y - Developing roller installation structure with limited compression - Google Patents
Developing roller installation structure with limited compression Download PDFInfo
- Publication number
- CN2872420Y CN2872420Y CN 200620006421 CN200620006421U CN2872420Y CN 2872420 Y CN2872420 Y CN 2872420Y CN 200620006421 CN200620006421 CN 200620006421 CN 200620006421 U CN200620006421 U CN 200620006421U CN 2872420 Y CN2872420 Y CN 2872420Y
- Authority
- CN
- China
- Prior art keywords
- developer roll
- rubber layer
- decrement
- developing roller
- locating sleeve
- 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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Abstract
A decrement-limitable developing roller installation structure comprises a OPC drum, a developing roller contact with OPC drum and a powder outlet blade elastically contact with the developing roller. The developing roller includes condensable rubber layers with a steel shaft and a circular steel shaft. The outer surface radius of the rubber layer is larger than the outer surface radius of a locating sleeve. The radius difference of the above two is equivalent to the decrement of the rubber layer. The utility model can limit the decrement of the rubber layer through the locating sleeve, avoid greater developing roller wear because of too much decrement of the rubber layer and also avoid the increase of powdered carbon box unit torque.
Description
Technical field
The utility model relates to the developer roll mounting structure in a kind of laser cartridge, especially a kind of developer roll mounting structure of the limited decrement of having improved.
Background technology
Electrophotographic image generates equipment by increasingly extensive use, and wherein laser printer is again that a kind of common electrophotographic image generates equipment, and its employed cartridge is removable to be installed on the laser printer, is used for providing carbon dust to laser printer.
A kind of contact cartridge is arranged in the existing cartridge, shown in Fig. 1, this type of contact cartridge generally comprises the developer roll 2, of an electronic photographic sensitive drum 1, and photosensitive drums 1 Elastic Contact and developer thickness adjusted part (calling the powder delivery cutter in the following text) 3 of developer roll 2 Elastic Contact or the like, for for purpose of brevity, interior and the closely-related element of the present invention of the contact cartridge that only drawn among Fig. 1, the element that other and the present invention have nothing to do is not done and is given unnecessary details.Wherein, developer roll 2 is made up of a steel axle 21 and the rubber layer 22 that is looped around on the steel axle, and rubber layer 22 can produce certain elastic deformation.3 on powder delivery cutter comprises knife rest 31 and is fixed on blade 32 on the knife rest 31, and knife rest 31 is made by rigid metallic material, and 32 on blade is made (also can be the comparatively soft alloy material of quality) by flexible materials such as plastics or resins.
In working order down, photosensitive drums 1 all is in rotation status with developer roll 2, blade 32 and developer roll 2 Elastic Contact (the certain compression of rubber layer 22 generations this moment, belong to sliding friction relation between blade 32 and the developer roll 2), thus control is attached to the thickness of the developer on the developer roll 2 (for example carbon dust etc.); Simultaneously, in working order down, developer roll 2 also with photosensitive drums 1 Elastic Contact (rubber layer 22 produces certain compression, belongs to rolling friction between developer roll 2 and the photosensitive drums 1 and concerns), make developer to be sent to photosensitive drums 1 and develop from developer roll 2.
Yet, in the mounting structure of above-mentioned developer roll 2, because developer roll 2 all keeps the Elastic Contact relation with photosensitive drums 1, powder delivery cutter 3, promptly, rubber layer 22 produces certain compression, therefore when developer roll 2 is in the duty of rotation, all keep certain friction force between developer roll 2 and photosensitive drums 1 and the powder delivery cutter 3, friction can make developer roll 2 produce certain wearing and tearing for a long time.If photosensitive drums 1, developer roll 2 exceed certain error range with the process of powder delivery cutter 3, the decrement of the rubber layer 22 on the developer roll 2 may exceed predetermined decrement so, make the friction force between developer roll 2 and photosensitive drums 1 and the powder delivery cutter 3 enlarge markedly, especially the force of sliding friction between powder delivery cutter 3 and the developer roll 2 sharply increases, the wearing and tearing meeting of developer roll 2 is more serious, the moment of torsion of toner cartridge assembly also will increase simultaneously, easily cause the distortion of driving members such as gear, make cartridge not work normally.
Therefore, provide a kind of developer roll mounting structure of decrement that limits in fact for necessary.
Novel content
The purpose of this utility model is a kind of developer roll mounting structure that limits decrement of design.
For achieving the above object, the developer roll mounting structure of the limited decrement that provides of the utility model comprise photosensitive drums, with the developer roll of photosensitive drums Elastic Contact, with the powder delivery cutter of developer roll Elastic Contact and the locating sleeve that is arranged on the developer roll two ends.Described developer roll comprises the steel axle and around the compressible rubber layer of steel axle, the outside surface radius of described rubber layer is greater than the outside surface radius of locating sleeve, and the radius difference of the two equals the decrement of described rubber layer.
The developer roll mounting structure that limits decrement described in the utility model has limited the decrement of rubber layer by locating sleeve, has avoided aggravating owing to decrement is excessive the wearing and tearing of developer roll, has also avoided the increase of toner cartridge assembly moment of torsion simultaneously.
Description of drawings
Fig. 1 is the schematic perspective view of existing developer roll mounting structure;
Fig. 2 is the schematic perspective view that limits the developer roll mounting structure of decrement described in the utility model;
Fig. 3 is that locating sleeve described in the utility model is installed in the stereographic map on the developer roll;
Fig. 4 is the stereographic map of locating sleeve described in the utility model;
Below in conjunction with the diagram and preferred embodiment the utility model is described in further detail.
Embodiment
With reference to shown in Figure 2, the developer roll mounting structure that limits decrement described in the utility model comprise photosensitive drums 1, with the developer roll 2 of photosensitive drums 1 Elastic Contact, with the powder delivery cutter 3 of developer roll 2 Elastic Contact and the locating sleeve 4 that is arranged on developer roll 2 two ends.
In conjunction with reference to Fig. 3, shown in Figure 4, powder delivery cutter 3 comprises knife rest 31 and blade 32; Developer roll 2 comprises steel axle 21 and around the radially compressible rubber layer 22 of steel axle 21, the both ends of the surface 23,24 of rubber layer 22 all do not exceed the scope of blade 32 both ends of the surface 33,34.Locating sleeve 4 is the annulus of rigidity (can be that comparatively hard resin etc. is made), and its internal diameter equals or be slightly smaller than the external diameter of steel axle 21.Locating sleeve 4 is near the both ends of the surface 23,24 of rubber layer 22.Suppose that the decrement that the rubber layer 22 of developer roll 2 is scheduled to is P, and the outside surface radius of rubber layer 22 and locating sleeve 4 is for being respectively R and r, then the size of decrement P should satisfy following relation: P=R-r, and promptly decrement P equals outside surface radius poor of rubber layer 22 and locating sleeve 4.
Obviously, after adopting above-mentioned mounting structure, even the manufacturing dimension between developer roll 2 and the powder delivery cutter 3 has than mistake and may surpass the predetermined decrement P of rubber layer 22 time, blade 3 cover 4 that will be positioned withstands and makes decrement be unlikely to surpass the P value, locating sleeve 4 promptly can limit the decrement of rubber layer 22 thus, makes its decrement be no more than predetermined in advance P value.Same, the foozle between photosensitive drums 1 and the developer roll 2 also can limit by locating sleeve 4, prevents the excessive and wearing and tearing of aggravation developer roll 2 of decrement, and the while has also been avoided the increase of toner cartridge assembly moment of torsion.
Technical conceive of the present utility model is not limited in the foregoing description, can also obtain many different embodiment according to design of the present utility model, and suchlike minor alteration and equivalent transformation all should be included within the scope that claim protects.
Claims (2)
1, can limit the developer roll mounting structure of decrement, it comprises:
Developer roll, it comprises the steel axle and is looped around compressible rubber layer on the steel axle;
Photosensitive drums, itself and above-mentioned developer roll Elastic Contact; And
The powder delivery cutter, it comprises knife rest and is fixed on blade on the knife rest, the rubber layer Elastic Contact of blade and above-mentioned developer roll, and the both ends of the surface of described rubber layer do not exceed the scope of blade both ends of the surface;
It is characterized in that: the two ends of described developer roll are provided with the locating sleeve of rigidity respectively, and the outside surface radius of described rubber layer is greater than the outside surface radius of locating sleeve, and the radius difference of the two equals the predetermined decrement of described rubber layer.
2, the developer roll mounting structure that limits decrement according to claim 1 is characterized in that: described locating sleeve is near two end faces of rubber layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620006421 CN2872420Y (en) | 2006-02-26 | 2006-02-26 | Developing roller installation structure with limited compression |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620006421 CN2872420Y (en) | 2006-02-26 | 2006-02-26 | Developing roller installation structure with limited compression |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2872420Y true CN2872420Y (en) | 2007-02-21 |
Family
ID=37740766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620006421 Expired - Fee Related CN2872420Y (en) | 2006-02-26 | 2006-02-26 | Developing roller installation structure with limited compression |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2872420Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103885309A (en) * | 2014-03-10 | 2014-06-25 | 珠海天威飞马打印耗材有限公司 | Powder feeding roller and processing box |
-
2006
- 2006-02-26 CN CN 200620006421 patent/CN2872420Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103885309A (en) * | 2014-03-10 | 2014-06-25 | 珠海天威飞马打印耗材有限公司 | Powder feeding roller and processing box |
| CN103885309B (en) * | 2014-03-10 | 2017-11-28 | 珠海天威飞马打印耗材有限公司 | Powder feeding roller and handle box |
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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: 20070221 |