CN201402370Y - Doctor blade - Google Patents
Doctor blade Download PDFInfo
- Publication number
- CN201402370Y CN201402370Y CN2009200556267U CN200920055626U CN201402370Y CN 201402370 Y CN201402370 Y CN 201402370Y CN 2009200556267 U CN2009200556267 U CN 2009200556267U CN 200920055626 U CN200920055626 U CN 200920055626U CN 201402370 Y CN201402370 Y CN 201402370Y
- Authority
- CN
- China
- Prior art keywords
- powder delivery
- delivery cutter
- blade
- lamellar body
- cutter according
- 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 - Lifetime
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
- G03G15/0812—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the developer regulating means, e.g. structure of doctor blade
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
The utility model relates to a doctor blade which is arranged in a laser printer cartridge. A blade of the doctor blade is provided with a fixing part for fixing the blade and a suspension arm part extending from the fixing part. An outer end of the suspension arm part is provided with a contact part for being contacted with a developer roller. The suspension arm part is a cambered surface shapedsheet body which can be bent towards or away from the developer roller. During the assembly of the cartridge using the doctor blade, the doctor blade is contacted with the developer roller, the suspension arm part of the doctor blade undergoes elastic deformation under a pressure, the arched cambered surface is more beneficial for the conversion of the elastic deformation into potential energy stored for the doctor blade, and the doctor blade and the developer roller contacted with the doctor blade are then caused to output constant pressure, therefore, the uniformity of toner control can be ensured and the improvement of the printing quality is under best guaranty.
Description
Technical field
The utility model relates to the laser printing technology field, specifically a kind of powder delivery cutter that is installed in the laser printer carbon powder box.
Background technology
Laser printer is one of present most widely used computing machine output peripheral equipment, and it utilizes the physics, the principles of chemistry of light, electricity, heat by interaction output character or image.Basic process can be divided into seven steps such as charging, exposure, development, transfer printing, photographic fixing, the electricity that cleans, disappears.At first, photosensitive drum surface is charged equably by charging roller.Laser scanner is launched the laser through ovennodulation that contains image information to photosensitive drums, forms and the electrostatic latent image for the treatment of that duplicating image is corresponding at photosensitive drum surface.Then, from the carbon dust of developer roll then be adsorbed on and make electrostatic latent image convert visual image on the photosensitive drum surface.Along with the rotation of photosensitive drums, replace to transfer roll at the visual image that photosensitive drum surface forms by carbon dust.Through the effect of transfer roll transfer voltage, visual image is transferred on the recording medium such as paper, with after after warm-up mill and backer roll carry out heating and pressurizing to the visual image on the recording medium, the visual image full solidification that carbon dust is formed is on recording medium.So basic imaging action has just been finished.
In above-mentioned print procedure, convert the electrostatic latent image on the photosensitive drums to visual image, must depend on the adsorbed carbon dust of developer roll.These carbon dusts are stored in the toner, and by the transport supply of powder feeding roller realization to developer roll.Developer roll is adsorbed on its surface by Electrostatic Absorption effectiveness with carbon dust, and when when keeping the powder delivery cutter of Elastic Contact with developer roll, the carbon dust on developer roll surface is wipeed off equably to suitable thickness.This shows that utilizing the control of powder delivery cutter and making the carbon dust layer that it is suitable that the developer roll surface has all even thickness of one deck is the good key of print quality.
Existing powder delivery cutter mainly contains two kinds on adhesive tape type and all-metal type, and two kinds of powder delivery cuttves all have fixed part that is used to be fixed and the bracketed part that stretches out from this fixed part, and the outer end of this bracketed part has the contact site that contacts with developer roll.As Fig. 1, the fixed part of adhesive tape type powder delivery cutter utilizes screw and pressing plate to be fixed on blade support or the powder box framework, bracketed part stretches out from its fixed part straightly, the adhesive tape of materials such as terminal contact site employing polyurethane that contacts with developer roll of bracketed part or silicon rubber, adhesive tape and bracketed part normally viscose glue are connected.As Fig. 2 and Fig. 3, all-metal type powder delivery cutter relatively simple for structure, its fixed part adopts welding or bonding way to be fixed on blade support or the powder box framework, the bracketed part of this powder delivery cutter stretches out or to angle of developer roll direction bending, the contact site of bracketed part outer end and developer roll is formed in one in the evagination circular arc of bracketed part or flanging wedge angle from its fixed part is straight.Above-mentioned two kinds of powder delivery knife structures are unfavorable for that all the powder delivery cutter keeps stabilized uniform elastic force to developer roll, and also can have influence on the sealing effectiveness of powder delivery cutter to whole toner to the structure of developer roll direction bending.
The utility model content
The purpose of this utility model provides that a kind of mechanical property is more stable, elastic force powder delivery cutter more uniformly, can keep more lasting and stable elastic force export to developer roll.
To achieve these goals, the utility model has adopted following technical scheme: a kind of powder delivery cutter is provided, comprise blade, this blade have the fixed part that is used to be fixed and with the bracketed part that stretches out from this fixed part, the outer end of this bracketed part has the contact site that contacts with developer roll, and described bracketed part is the arc surfaced lamellar body.
Described arc surfaced lamellar body is towards the bending of developer roll direction or deviate from the bending of developer roll direction.
Described fixed part is the planar shaped lamellar body, and the plane at this planar shaped lamellar body place can be cut tangent or mutually with described arc surfaced lamellar body.
For different cartridge structures, the length difference of the bracketed part of powder delivery cutter.In order to reach potential energy deposit and elastic force output preferably, according to test findings and practical experience, the radius-of-curvature of arc surfaced lamellar body adopts 5 millimeters～50 millimeters, can obtain print quality preferably.
Described arc surfaced lamellar body is an arc on its xsect, the centering angle of this arc is an acute angle, keeps circumscribed contact towards developing roller surface with the developer roll surface so that guarantee described bracketed part outer end.
Described arc surfaced lamellar body is that surface coated has the sheet metal of wearing layer and/or insulation course or the elastic sheet of other material.Wherein, sheet metal is preferably stainless steel substrates.Surface coated wearing layer or insulation course can reach even more ideal control powder effect.
Described contact site can be formed in one in the evagination circular arc of described bracketed part outer end or flanging wedge angle, also can be adhesive tape such as the polyurethane that is pasted on described bracketed part outer end or silicon rubber.
Further, described powder delivery cutter also comprises the blade support that is connected with its fixed part, and the type of attachment of this blade support and described fixed part can be connected for welding, screwing or viscose glue.Wherein be welded as preferred version, simple in structure because of it, assembly is few and cost is low.
The cartridge of having used the utility model powder delivery cutter is when assembling, the powder delivery cutter contacts with developer roll, the bracketed part pressurized of powder delivery cutter produces elastic deformation, shape such as arc cambered surface more help this elastic deformation is converted to the potential energy of powder delivery cutter self deposit, make powder delivery cutter pair developer roll output constant compression force contacted with it, thereby guaranteed the even of control powder, made print quality obtain best assurance.
Description of drawings
Fig. 1 is the structural representation of existing a kind of adhesive tape type powder delivery cutter;
Fig. 2 is the structural representation of existing a kind of all-metal type powder delivery cutter;
Fig. 3 is the structural representation of existing another kind of all-metal type powder delivery cutter;
Fig. 4 is the stereographic map of the embodiment one of the utility model powder delivery cutter;
Fig. 5 is the cross-sectional view of the embodiment one of the utility model powder delivery cutter;
Fig. 6 is the stereographic map of the embodiment two of the utility model powder delivery cutter;
Fig. 7 is the cross-sectional view of the embodiment two of the utility model powder delivery cutter;
Fig. 8 is the stereographic map of the embodiment three of the utility model powder delivery cutter;
Fig. 9 is the stereographic map of the embodiment four of the utility model powder delivery cutter;
Figure 10 is the cross-sectional view of the embodiment five of the utility model powder delivery cutter;
Figure 11 is the cross-sectional view of the embodiment six of the utility model powder delivery cutter;
Figure 12 is that powder delivery cutter shown in Figure 4 is at cartridge assembling process front-back direction comparison diagram;
Figure 13 is that powder delivery cutter shown in Figure 9 is at cartridge assembling process front-back direction comparison diagram.
Embodiment
Embodiment one
Referring to Fig. 4, the powder delivery cutter of present embodiment comprises support 1 and the stainless steel blade 2 by being fixedly welded on support 1, and this stainless steel blade 2 has the fixed part 21 that is used to be fixed and from fixed part 21 outwardly directed bracketed parts 22.This fixed part 21 is the planar shaped lamellar body, and bracketed part 22 is the arc surfaced lamellar body towards the bending of developer roll direction, and bracketed part 22 is one-body molded with fixed part 21, and the plane at the cambered surface at these bracketed part 22 places and fixed part 21 places is tangent.The outer end of bracketed part 22 has the contact site 23 that contacts with developer roll, and this contact site 23 is formed in one in the evagination circular arc of described bracketed part outer end.
Referring to Fig. 4, in order to reach potential energy deposit and elastic force output preferably, according to test findings and practical experience, the span of the radius of curvature R of bracketed part 22 is 5 millimeters～50 millimeters, can obtain print quality preferably.
Continuation is referring to Fig. 4, and bracketed part 22 is an arc on its xsect, and the centering angle β of this arc is an acute angle, keeps circumscribed the contact so that guarantee the evagination arc-shaped surface of contact site 23 with the developer roll surface.
Bracketed part 22 is a stainless steel substrates, and its surface can be coated with wearing layer and/or insulation course, to reach even more ideal control powder effect.Need to prove that stainless steel is a kind of preferred version of elastic sheet, obviously, can also adopt the elastic sheet of other metals or other material to replace stainless steel substrates.
Figure 12 shows the powder delivery cutter of present embodiment at cartridge assembling process front-back direction comparison diagram, and wherein dot-and-dash line is represented is blade position before the assembling, and solid line is represented is blade position after the assembling.The powder delivery cutter of present embodiment by with blade 2 towards the crooked circular arcs of developer roll 8, raised blade 2 and developer roll 8 contacted positions, having guaranteed has certain compress variation between developer roll 8 and the blade 2, thereby the elastic force that guarantees the powder delivery cutter is exported.
Embodiment two
Referring to Fig. 6, the powder delivery cutter of present embodiment comprises support 1 and by being adhesively fixed in the stainless steel blade 3 of support 1, and this stainless steel blade 3 has the fixed part 31 that is used to be fixed and from fixed part 31 outwardly directed bracketed parts 32.This fixed part 31 is the planar shaped lamellar body, the arc surfaced lamellar body of bracketed part 32 for deviating from the bending of developer roll direction, and bracketed part 32 is one-body molded with fixed part 31, and the plane at the cambered surface at these bracketed part 32 places and fixed part 31 places is tangent.The outer end of bracketed part 32 has the contact site 33 that contacts with developer roll, and this contact site 23 is formed in one in the flanging wedge angle of described bracketed part outer end.
Referring to Fig. 7, in order to reach potential energy deposit and elastic force output preferably, according to test findings and practical experience, the span of the radius of curvature R of bracketed part 32 is 5 millimeters～50 millimeters, can obtain print quality preferably.
Continuation is referring to Fig. 7, and bracketed part 32 is an arc on its xsect, and the centering angle β of this arc is an acute angle, keeps circumscribed the contact so that guarantee the flanging wedge angle of contact site 33 with the developer roll surface.
Bracketed part 32 is a stainless steel substrates, and its surface can be coated with wearing layer and/or insulation course, to reach even more ideal control powder effect.This stainless steel substrates can adopt the elastic sheet of other metals or other material to replace equally.
Embodiment three
Referring to Fig. 8, the fixed part 41 of the blade 4 of present embodiment powder delivery cutter, bracketed part 42 and support 1 are identical with embodiment one, blade 4 is with the difference of the blade 2 of embodiment one, and the contact site 43 of blade 4 has made the flanging wedge angle form of the contact site 33 in the middle of embodiment illustrated in fig. 6 two the blade 3 into.
Embodiment four
Referring to Fig. 9, the fixed part 51 of the blade 5 of present embodiment powder delivery cutter, bracketed part 52 and support 1 are identical with embodiment two, blade 5 is with the difference of the blade 3 of embodiment two, and the contact site 53 of blade 5 has made the evagination arc form of the contact site 23 in the middle of embodiment illustrated in fig. 4 one the blade 2 into.
Figure 13 shows the powder delivery cutter of present embodiment at cartridge assembling process front-back direction comparison diagram, and wherein dot-and-dash line is represented is blade position before the assembling, and solid line is represented is blade position after the assembling.
Embodiment five
Referring to Figure 10, the general configuration of present embodiment powder delivery cutter is identical with embodiment one, and the key distinction is that the cambered surface at bracketed part 62 places of present embodiment powder delivery cutter is cut mutually with the plane at fixed part 61 places.
Embodiment six
Referring to Figure 11, the general configuration of present embodiment powder delivery cutter is identical with embodiment two, and the key distinction is that the cambered surface at bracketed part 72 places of present embodiment powder delivery cutter is cut mutually with the plane at fixed part 71 places.
More than enumerated several embodiment of the present utility model, it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model protection domain.Should be noted that, for the person of ordinary skill of the art, under the prerequisite that does not break away from inventive concept of the present utility model, can also make some distortion and improvement, for example: blade be not limited to welding of the foregoing description and bonding mode being connected of support, can also utilize the fixing method of screw and pressing plate to realize; The contact site of blade also can adopt the form of adhesive tape such as the polyurethane that is pasted on the bracketed part outer end or silicon rubber; The utility model powder delivery cutter can not comprise holder part, and the fixed part of powder delivery cutter can directly be fixed on the cartridge framework by screw etc.More than these distortion and improving all within protection domain of the present utility model.
Claims (10)
1. powder delivery cutter, comprise blade, this blade has fixed part that is used to be fixed and the bracketed part that stretches out from this fixed part, and the outer end of this bracketed part has the contact site that contacts with developer roll, it is characterized in that described bracketed part is the arc surfaced lamellar body.
2. powder delivery cutter according to claim 1 is characterized in that: described arc surfaced lamellar body is towards the bending of developer roll direction or deviate from the bending of developer roll direction.
3. powder delivery cutter according to claim 1 is characterized in that: described fixed part is the planar shaped lamellar body, and the plane at this planar shaped lamellar body place is tangent with described arc surfaced lamellar body or cut mutually.
4. powder delivery cutter according to claim 1 is characterized in that: the radius-of-curvature of described arc surfaced lamellar body is 5 millimeters～50 millimeters.
5. powder delivery cutter according to claim 1 is characterized in that: described arc surfaced lamellar body is an arc on its xsect, and the centering angle of this arc is an acute angle.
6. powder delivery cutter according to claim 1 is characterized in that: described arc surfaced lamellar body is the elastic sheet that surface coated has wearing layer and/or insulation course.
7. powder delivery cutter according to claim 6 is characterized in that: described elastic sheet is a stainless steel substrates.
8. powder delivery cutter according to claim 1 is characterized in that: described contact site is formed in one in the evagination circular arc of described bracketed part or flanging wedge angle.
9. powder delivery cutter according to claim 1 is characterized in that: described contact site is the adhesive tape that is pasted on described bracketed part.
10. powder delivery cutter according to claim 1 is characterized in that: this powder delivery cutter also comprises the blade support that is connected with described fixed part, and this blade support is that welding, screwing or viscose glue are connected with the type of attachment of described fixed part.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200556267U CN201402370Y (en) | 2009-04-24 | 2009-04-24 | Doctor blade |
| PCT/CN2010/071963 WO2010121544A1 (en) | 2009-04-24 | 2010-04-21 | Developer layer-thickness regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200556267U CN201402370Y (en) | 2009-04-24 | 2009-04-24 | Doctor blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201402370Y true CN201402370Y (en) | 2010-02-10 |
Family
ID=41662168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200556267U Expired - Lifetime CN201402370Y (en) | 2009-04-24 | 2009-04-24 | Doctor blade |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN201402370Y (en) |
| WO (1) | WO2010121544A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010121544A1 (en) * | 2009-04-24 | 2010-10-28 | 珠海天威飞马打印耗材有限公司 | Developer layer-thickness regulator |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07219339A (en) * | 1994-01-31 | 1995-08-18 | Canon Inc | Elastic blade, manufacture thereof and developing device |
| JP2001109259A (en) * | 1999-10-04 | 2001-04-20 | Canon Inc | Developer regulating member, developing device and process cartridge as well as image forming device |
| JP4452978B2 (en) * | 2003-10-07 | 2010-04-21 | ブラザー工業株式会社 | Development unit, image forming apparatus |
| CN201402370Y (en) * | 2009-04-24 | 2010-02-10 | 珠海天威飞马打印耗材有限公司 | Doctor blade |
-
2009
- 2009-04-24 CN CN2009200556267U patent/CN201402370Y/en not_active Expired - Lifetime
-
2010
- 2010-04-21 WO PCT/CN2010/071963 patent/WO2010121544A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010121544A1 (en) * | 2009-04-24 | 2010-10-28 | 珠海天威飞马打印耗材有限公司 | Developer layer-thickness regulator |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010121544A1 (en) | 2010-10-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100210 |
|
| CX01 | Expiry of patent term |