CN201194069Y - Developing device for laser printer - Google Patents
Developing device for laser printer Download PDFInfo
- Publication number
- CN201194069Y CN201194069Y CNU2008200471264U CN200820047126U CN201194069Y CN 201194069 Y CN201194069 Y CN 201194069Y CN U2008200471264 U CNU2008200471264 U CN U2008200471264U CN 200820047126 U CN200820047126 U CN 200820047126U CN 201194069 Y CN201194069 Y CN 201194069Y
- Authority
- CN
- China
- Prior art keywords
- developer roll
- powder
- sealing
- paper used
- flexure strip
- 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
Links
Images
Abstract
The utility model discloses a developing unit for a laser printer comprising a powder bin and a development roller. The two shaft ends of the development roller are respectively supported by the powder bin frame, and the roll surfaces of the two shaft ends facing to the powder bin are sealed by arc seals. The gap between one side of the middle shaft of the development roller and the powder discharging chamber is sealed by a powder discharging knife composed of a rigid bracket and a elastic sheet. One end of the rigid bracket on the cross section of the development roller is supported on the powder bin holder frame, and the other end is freely mounted. One end of the elastic sheet on the cross section of the development roller is fixed on the free end of the rigid bracket and the other end keeps elastic contact with the development roller surface as a free mounting mode. The parts of the free end of the elastic sheet corresponding to the arc seals are filled into the space between the arc seals and the roller surface of the development roller corresponding to the arc seals. The development device can effectively prevent the carbon powder leakage phenomena from the shaft end of the development roller.
Description
Technical field
The utility model relates to for example developing apparatus of laser printer of electrophotographic image forming, particularly is equipped with to be passed to photosensitive drums becomes the developer roll of visual image with the conversion electrostatic latent image developing apparatus to carbon dust and so on developer.
Background technology
Electrophotographic image forming, for example laser printer is the photosensitive drums that has predetermined potential by the laser scanning irradiation, forms electrostatic latent image on its surface.This electrostatic latent image is developed with predetermined carbon dust, and then will be transferred on the paper, the image fixing of transfer printing acquisition, become the visual image that naked eyes can be observed afterwards,---signal---conversion between the image that realizes image thus through the image that develops.
Common laser printer is provided with charging roller, photosensitive drums, laser scanning mechanism, developing apparatus, transfer roll and fixing roller etc. in its casing.
Photosensitive drums charges to predetermined potential by charging roller, and response is formed corresponding to the electrostatic latent image for the treatment of print image by laser scanning mechanism emitted laser bundle.
Store carbon dust in the container that developing apparatus is established within it, and utilize powder feeding roller and developer roll carbon dust to be sent to the photosensitive drums that has electrostatic latent image.
The visual image that forms on the photosensitive drums is transferred on the paper between photosensitive drums and the transfer roll by transfer roll, utilizes fixing roller that the carbon dust image on the paper is given photographic fixing at last.
Above-mentioned developing apparatus, utilize the powder storehouse to bear the storage task of carbon dust on the one hand, on the other hand, powder feeding roller and developer roll are arranged at the inside of developing apparatus simultaneously, realize carbon dust transmission between developer roll and photosensitive drums by powder feeding roller and developer roll, finish the conversion between photosensitive drums electrostatic latent image and the visual image in transhipment between powder feeding roller and the developer roll and carbon dust.Developing apparatus comprises powder storehouse, powder feeding roller and developer roll on the whole.Can achieve a fixed connection by bearing pin and pin-and-hole between the graphics processing unit at itself and photosensitive drums place, what this mode obtained is the integral type laser printer processing box; Perhaps respectively as the individual components manufacturing, separate accumulating or sale, and fit assembling when installation, what this mode obtained is split type laser printer processing box.
For example, domestic application for a patent for invention CN00128815.6 discloses a kind of developing apparatus.This developing apparatus utilizes a kind of low friction scraper to adjust the thickness of carbon dust layer on the developer roll.An edge of the long side direction of this low friction scraper contacts with the roll surface of developer roll, and relative edge contacts with biasing member.The elastic acting force perpendicular to the developer roll axis that applies by biasing member makes low friction scraper be resisted against the developer roll roll surface.Biasing member is the arciform bow spring of likeness in form, and the outside at its bow abdomen middle part removably is fixed on the developing device frame, and bow body two ends are resisted against the relative edge of aforementioned low friction scraper along last.Biasing member is about 1400g to the elastic acting force numerical value that low friction scraper applies.Thus, biasing member is by the contact of bow body two ends with low friction scraper, two contact points of the elastic force of bow spring generation by its end are passed on the low friction scraper, impel low friction scraper to adjust in real time between itself and the developer roll surface, reach and keep the uniform purpose of developer roll surface carbon powder layer thickness because of developer roll rotates the gap variation that forms.Yet, because having, the workplace of developer roll is not shorter than for example length of paper fabric width of recording medium, adjust of the face length adaptation of the length of the mission requirements low friction scraper of carbon dust layer thickness on the developer roll entire working surface with developer roll, therefore, the elastic force transmitting effect mode of this two point form, especially spread out of under near the state that a little is positioned at the low friction scraper two ends at acting force, center section between the acting force receiving station of low friction scraper will bear uneven acting force, cause low friction scraper stress maldistribution easily and deformation takes place, for example its middle part forms on perpendicular to the direction on long limit and upwarps or recessed, and then cause that developer roll surface carbon powder layer thickness becomes inhomogeneous along the distribution of developer roll on axially, the print image shade that becomes is differed.
On the said structure basis, also have further improvement to low friction scraper, spongy layer for example is set with sponge is outside to contact the thin slice that developing roller surface is provided for controlling powder outlet quantity being positioned on low friction scraper.Yet also there is certain shortcoming in this adjustment, shows as in its developer roll rotary course, and spongy layer and thin slice have the movement tendency that departs from the developer roll surface under the effect of developer roll skin-friction force.Series of solutions is to depart from the direction of motion on developer roll surface at spongy layer and thin slice, on the low friction scraper support anti-slip component is set, and departs from the motion on developer roll surface to hinder spongy layer and thin slice.But,, use bow spring near the low friction scraper stress point, to form big pressure easily, and then produce big friction force as what above introduce.This friction force causes thin slice to produce stress concentrated and generation cripling or bending easily, causes uneven contact condition between low friction scraper and the developer roll, causes print quality to descend.Simultaneously, also there is the anxiety of carbon dust leakage in the developer roll axial end portion.
The utility model content
The utility model purpose is to provide for example developing apparatus of laser printer of a kind of electrophotographic image forming, the thickness of carbon dust layer reaches uniform state on this developing apparatus scalable developer roll, and can stop to leak from the developer roll axial end portion phenomenon of carbon dust effectively.
According to above-mentioned purpose, the utility model laser printer developing apparatus comprises by powder storehouse seat and surrounds the powder storehouse forms and be used to adsorb carbon dust and it is passed to the developer roll of photosensitive drums place photosensitive unit.Two axle heads of developer roll are supported on respectively on the respective frame that is used for powder storehouse seat is provided support, and these two axle heads each is sealed by the arc strip of paper used for sealing towards the roll surface in powder storehouse.The developer roll body of roll is arranged in the powder delivery chamber that is provided with on the seat of powder storehouse.Developer roll axis one side is sealed by the powder delivery cutter with the gap between the powder delivery chamber.The powder delivery cutter is made of rigid support and flexure strip.On the seat framework of powder storehouse, and its other end freely suspends rigid support at the end bearing on the developer roll axis xsect.The end of flexure strip on developer roll axis xsect is fixed on the rigid support free end, and its other end keeps the Elastic Contact of circumscribed form with the developer roll surface in the mode that freely suspends.The flexure strip free end is axially clogged between the roll surface corresponding to the arc strip of paper used for sealing of arc strip of paper used for sealing and developer roll with the acute angle form corresponding to the position of arc strip of paper used for sealing along developer roll.
Preferably, aforementioned laser printer developing apparatus, its flexure strip keeps on the contrary to the sense of rotation of its free-ended bearing of trend with developer roll from its stiff end.
According to qualifications, aforementioned laser printer developing apparatus, its flexure strip free end keeps integrated connection with the flexure strip free end corresponding to the position outside the arc strip of paper used for sealing corresponding to the position of arc strip of paper used for sealing.
Laser printer developing apparatus of the present utility model, along developer roll axially, clog the flexure strip free end between the corresponding roll surface of arc strip of paper used for sealing and developer roll with the acute angle form corresponding to the position of arc strip of paper used for sealing, in other words, on the axial cross section of developer roll, the flexure strip free end is rendered as by the crossing acute angle that constitutes in the two side of flexure strip corresponding to the position of arc strip of paper used for sealing, and the flexure strip free end is extending in parallel the rectangle frame that constitutes under the state corresponding to the two side that the position outside the arc strip of paper used for sealing is rendered as by flexure strip.Under this structural regime, flexure strip as powder delivery cutter component parts occurs with integrally-built form, just it is corresponding to the part outside the arc strip of paper used for sealing, that is corresponding to the position of the developer roll body of roll, keep one-piece construction with between the position corresponding to the arc strip of paper used for sealing, so, its position corresponding to the developer roll body of roll forms Elastic Contact with developer roll and then bears the task of the entrained carbon dust layer in developer roll surface being carried out thickness adjusted, its position corresponding to the arc strip of paper used for sealing is clogged between the corresponding roll surface of arc strip of paper used for sealing and developer roll, the result, axial along developer roll, the slit that originally was present between flexure strip and the arc strip of paper used for sealing is just sealed by the flexure strip of integrated structure, and feasible slit thus the possibility of carbon dust leakage occurs and stopped.
The drawing explanation
Fig. 1 the utility model laser printer developing apparatus fragmentary, perspective view one.
Fig. 2 the utility model laser printer developing apparatus fragmentary, perspective view two has omitted developer roll among the figure.
Fig. 3 the utility model laser printer developing apparatus fragmentary, perspective view three has omitted developer roll and powder delivery cutter among the figure.
Fig. 4 a the utility model developing apparatus constitutes part powder delivery cutter skeleton view one.
Fig. 4 b the utility model developing apparatus constitutes part powder delivery cutter skeleton view two.
Fig. 4 c the utility model developing apparatus constitutes the vertical skeleton view of part powder delivery cutter.
Fig. 5 a the utility model developing apparatus constitutes part powder delivery cutter and developer roll fit structure view.
Fig. 5 b the utility model developing apparatus constitutes part powder delivery cutter and developer roll mated condition skeleton view.
Fig. 6 a the utility model developing apparatus constitutes the deformation skeleton view one of part powder delivery cutter under mated condition.
Fig. 6 b the utility model developing apparatus constitutes the deformation skeleton view two of part powder delivery cutter under mated condition.
Embodiment
Referring to Fig. 1～6, show the relevant view of the utility model laser printer developing apparatus and corresponding construction parts thereof.
This developing apparatus A comprises that structurally at least one outer wall 102 by powder storehouse seat 101 surrounds the airtight powder storehouse 109 that forms, powder feeding roller (powder feeding roller be positioned at 109 inside, powder storehouse and do not illustrate in the drawings) and developer roll 105.109 inside, powder storehouse have the cavity that can store carbon dust.Powder feeding roller is wholy set in the inside in powder storehouse 109, two axle head is supported on respectively on two opposed bulkheads 103,104 of powder storehouse seat, it can be rotated under the driving force effect that printer provides, and then near the carbon dust of 109 inside, powder storehouse is sent to developer roll 105 from distance developer roll 105 positions far away.The body of roll of developer roll 105 is basically being arranged in the powder delivery chamber 106 in powder storehouse 109 across mode, and the part of its body of roll is positioned at powder storehouse 109 and is tightly connected with powder storehouse 109 in other words, and a part then is exposed to 109 outsides, powder storehouse.The axis of developer roll 105 is parallel to powder feeding roller, and two axle head is supported on respectively on two opposed bulkheads 103,104 of powder storehouse seat.Keep predetermined spacing distance between two bulkheads 103,104 on the central axis direction of developer roll 105, the length of this distance adapts with developer roll 105 ALs, so that the predetermined space that holds developer roll 105 to be provided.The surface of bulkhead 103,104 is all perpendicular to the axis of developer roll 105.Be supported on respectively at two axle heads of developer roll 105 under the state on two bulkheads 103,104 of powder storehouse seat 101, between same corresponding with it two bulkheads 103,104, each provides sealing by an arc strip of paper used for sealing 108 to developer roll 105 towards powder storehouse 109 and corresponding to the roll surface of these two axle heads.
Under confined state, developing apparatus A integral body is positioned in the corresponding frame (not shown) of laser printer, and keeps developer roll 105 to belong to the bulging face of the photosensitive drums of photosensitive unit towards the exposed part adjacency outside the powder delivery chamber 106.Developer roll 105 can rotate under the driving force effect that laser printer provides, the carbon dust that powder feeding roller is transmitted is adsorbed on the cylinder roller surface of self with electrostatic means, regulate the carbon dust layer thickness and the distributing homogeneity of roll surface simultaneously by powder delivery cutter 107, reach after the predetermined requirement, carbon dust is transferred to the bulging face of potential difference as the photosensitive drums on its carbon dust suction-operated basis, and then, electrostatic latent image is converted into the visible carbon dust image of vision by the electrostatic latent image on the carbon dust covering photosensitive drums drum face.
In the present embodiment, powder delivery cutter 107 constitutes (seeing shown in Fig. 4 a, b, the c) by the rigid support 110 of stainless steel and so on material preparation and the flexure strip 111 of resinous material preparation.On the cross section perpendicular to developer roll 105 axis, an end 1101 of rigid support 110 is supported on the powder storehouse seat 101 of developing apparatus A, and the other end 1102 freely suspends.On same cross-sectional, one end 1111 of flexure strip 111 is fixed on the free end 1102 of rigid support 110 by bonding way, its other end 1112 keeps freely suspending, and be divided into two parts, one is the sealing 1113 corresponding to arc strip of paper used for sealing 108, its two accent powder portion 1114 for being used to regulate the carbon dust layer thickness corresponding to developer roll 105 bodies of roll.On the axial cross section of developer roll 105, sealing 1113 is rendered as by the two side of flexure strip 111 and intersects the acute angle that constitutes, and obtains after the part of this acute angle by excision flexure strip 111.On the axial cross section of developer roll 105, the two side of transferring powder portion 1114 to be rendered as by flexure strip 111 is extending in parallel the rectangle frame that constitutes under the state.Keep integrated type of attachment between sealing 1113 and the accent powder portion 1114, that is to say sealing 1113 and transferring powder portion 1114 is two close-connected parts that belong to flexure strip 111, does not have the slit between the two.Under powder delivery cutter 107 is assembled to state among the developing apparatus A, bearing of trend to its free end 1112 keeps opposite (shown in Fig. 5 a) with the sense of rotation α of developer roll 105 to flexure strip 111 from its stiff end 1111, and the free end 1112 of flexure strip 111 developer roll 105 axially on clog between the roll surface corresponding to arc strip of paper used for sealing 108 of arc strip of paper used for sealing 108 and developer roll 105 with the acute angle form corresponding to the sealing 1113 of arc strip of paper used for sealing 108, that is to say that sealing 1113 is plugged into by its acute angle top between the roll surface corresponding to arc strip of paper used for sealing 108 of arc strip of paper used for sealing 108 and developer roll 105 (shown in Fig. 5 b).
Referring to Fig. 1,5a, b, 6a, b, under confined state, developer roll 105 roll surface tops are sealed by powder delivery cutter 107 with the gap between the powder delivery chamber 106.Simultaneously powder delivery cutter 107 and developer roll 105 are radially between the roll surface on top, in the axial length range of developer roll 105, under the state of developer roll 105 rotations, the relation that keeps mutual sliding friction, specifically be exactly by powder delivery cutter 107 constitute part flexure strip 111 by its transfer powder portion 1114 in the whole axial length range of developer roll 105 with developer roll 105 radially the roll surface on top keep the relation of sliding friction.Fig. 5 a, b, 6a, b have schematically described the metamorphosis of the powder delivery cutter 107 under mated condition.Flexure strip 111 in being assembled to developing apparatus A before integral body be rendered as a plate form, and under confined state, because it transfers powder portion 1114 to keep sliding friction with the roll surface of developer roll 105, that is to say and transfer powder portion 1114 to have Elastic Contact, therefore transfer powder portion 1114 can produce back to the bending district 112 of developer roll 105 roll surfaces because of the buffer brake that developer roll 105 roll surfaces apply and (see Fig. 5 a) at its position with developer roll 105 roll surfaces formation contact with the roll surface of developer roll 105.
Claims (3)
1. laser printer developing apparatus, comprise by powder storehouse seat and surround the powder storehouse forms and be used to adsorb carbon dust and it is passed to the developer roll of photosensitive drums place photosensitive unit, two axle heads of described developer roll be supported on respectively on the respective frame that is used for described powder storehouse seat is provided support and their each is sealed by the arc strip of paper used for sealing towards the roll surface in described powder storehouse, the described developer roll body of roll is arranged in the powder delivery chamber that is provided with on the seat of described powder storehouse, described developer roll axis one side is sealed by the powder delivery cutter with the gap between the described powder delivery chamber, described powder delivery cutter is made of rigid support and flexure strip, described rigid support at the end bearing on the described developer roll axis xsect on the seat framework of described powder storehouse and its other end freely suspends, the end of described flexure strip on described developer roll axis xsect is fixed on the described rigid support free end and its other end keeps the Elastic Contact of circumscribed form in the mode that freely suspends with described developer roll surface, it is characterized in that described flexure strip free end axially clogs between the roll surface corresponding to described arc strip of paper used for sealing of described arc strip of paper used for sealing and described developer roll with the acute angle form corresponding to the position of described arc strip of paper used for sealing along described developer roll.
2. laser printer developing apparatus according to claim 1 is characterized in that described flexure strip keeps on the contrary to the sense of rotation of its free-ended bearing of trend with described developer roll from its stiff end.
3. laser printer developing apparatus according to claim 2 is characterized in that described flexure strip free end keeps integrated connection with described flexure strip free end corresponding to the position outside the described arc strip of paper used for sealing corresponding to the position of described arc strip of paper used for sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200471264U CN201194069Y (en) | 2008-04-25 | 2008-04-25 | Developing device for laser printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200471264U CN201194069Y (en) | 2008-04-25 | 2008-04-25 | Developing device for laser printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201194069Y true CN201194069Y (en) | 2009-02-11 |
Family
ID=40393601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200471264U Expired - Fee Related CN201194069Y (en) | 2008-04-25 | 2008-04-25 | Developing device for laser printer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201194069Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8417131B2 (en) | 2009-12-25 | 2013-04-09 | Brother Kogyo Kabushiki Kaisha | Developing device |
| US8781377B2 (en) | 2009-12-25 | 2014-07-15 | Brother Kogyo Kabushiki Kaisha | Developing device |
| CN113777897A (en) * | 2021-08-16 | 2021-12-10 | 珠海天威飞马打印耗材有限公司 | Modified carbon powder and carbon powder box |
-
2008
- 2008-04-25 CN CNU2008200471264U patent/CN201194069Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8417131B2 (en) | 2009-12-25 | 2013-04-09 | Brother Kogyo Kabushiki Kaisha | Developing device |
| US8781377B2 (en) | 2009-12-25 | 2014-07-15 | Brother Kogyo Kabushiki Kaisha | Developing device |
| US9280082B2 (en) | 2009-12-25 | 2016-03-08 | Brother Kogyo Kabushiki Kaisha | Developing device |
| CN113777897A (en) * | 2021-08-16 | 2021-12-10 | 珠海天威飞马打印耗材有限公司 | Modified carbon powder and carbon powder box |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2869939Y (en) | Developing case for laser printer | |
| CN1983058B (en) | Image developing apparatus and image forming apparatus using the same | |
| CN103365146B (en) | Image forming apparatus | |
| CN201194069Y (en) | Developing device for laser printer | |
| CN1912772A (en) | Image forming apparatus | |
| CN102236296A (en) | Regulating device, image bearing member cleaning device, developing device, cleaning device, process cartridge and image forming apparatus | |
| CN200972573Y (en) | Developing box for laser printer | |
| CN103186073A (en) | Developer storage container, image forming unit and image forming apparatus | |
| EP1815299B1 (en) | Imaging methods, imaging member charging methods, and image engines | |
| CN109669336A (en) | A kind of toner cartridge of wear-resisting type | |
| CN102375377B (en) | Developing box and imaging device | |
| CN201149638Y (en) | Developing device for electronic photography image-forming apparatus | |
| CN201707547U (en) | Carbon powder box for laser printers | |
| CN201054076Y (en) | Developing device for electronic photography imaging apparatus | |
| CN101661262A (en) | Image forming apparatus and image forming unit | |
| CN201210228Y (en) | Developing device for laser printer | |
| CN202196265U (en) | Charging device, develop box and image forming device | |
| CN2924595Y (en) | Developing unit for electronic photography image-forming equipment | |
| CN200997046Y (en) | Developer for electronic camera imager | |
| CN207689833U (en) | A kind of bulging powder integral type toner cartridge | |
| CN101452243A (en) | Developing apparatus | |
| CN201820086U (en) | Powder output knife and carbon powder box | |
| CN201181395Y (en) | Developing case for laser printer | |
| CN201247387Y (en) | Processing box for electrophotography imaging apparatus | |
| CN201654469U (en) | Developing cartridge and processing cartridge containing same |
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: 20090211 |