CN102955393A - Imaging device - Google Patents
Imaging device Download PDFInfo
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- CN102955393A CN102955393A CN2011102449581A CN201110244958A CN102955393A CN 102955393 A CN102955393 A CN 102955393A CN 2011102449581 A CN2011102449581 A CN 2011102449581A CN 201110244958 A CN201110244958 A CN 201110244958A CN 102955393 A CN102955393 A CN 102955393A
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- imaging device
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- roll shaft
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Abstract
The invention provides an imaging device. The imaging device comprises 1, a photoreceptive unit which is provided with a photoreceptor, 2, a developing unit which comprises a housing, a developing roller and a pair of support platforms, wherein the developing roller is arranged in the housing; two ends of the developing roller respectively support two opposite side walls of the housing; developing roller parts stretching out of the two opposite side walls are provided respectively with annular bearings; and the pair of support platforms are oppositely arranged on outer surfaces of the two opposite side walls, and 3, two side plates which are respectively located at outer sides of the two opposite side walls of the developing unit, wherein two side plates comprise a pair of developing roller shaft support parts and a pair of pressing parts, wherein the developing roller is supported on the pair of developing roller shaft support parts by the annular bearings; one end of each one of the pair of pressing parts is fixedly arranged on the corresponding one of the two side plates and the other end of each one of the pair of pressing parts elastically presses the corresponding one of the pair of support platforms of the developing unit; and when the pair of pressing parts elastically press the pair of support platforms, the annular bearings move along the pair of developing roller shaft support parts and can rotate relatively to the pair of developing roller shaft support parts.
Description
Technical field
The present invention relates to a kind of imaging device, relate in particular to a kind of imaging device that is removably installed in the image forming apparatus.
Background technology
In recent years, in the image forming apparatus of electronics description mode, because the integrated imaging devices such as developing cell and photo-conductor unit and useless toner accepting box have been used in the requirement of the miniaturization of equipment.In this imaging device, the developer roll by developing cell provides toner and develops to the photoreceptor of photosensitive unit.
Developing cell generally includes developer roll, supply roller and toner cartridge etc., and photo-conductor unit generally includes photoreceptor, live part and cleaning member etc.
The toner that developing cell will be filled in the toner cartridge offers developer roll by the supply roller, and the toner that adheres on the surface of developer roll forms the thin layer of uniform thickness by the development blade, and so that toner frictional electrification.
In the photo-conductor unit, the Surface Contact live part of the photoreceptor that is driven in rotation is by the voltage of live part output with the electric polarity identical polar of toner, so that the uniform surface of photoreceptor ground is charged.Form electrostatic latent image by this charged photosensitive surface of laser scanning, the developer roll of developing cell is pressed to photoreceptor, so that the charged toner on the developer roll transfers on the photosensitive surface that forms electrostatic latent image, thereby forms toner image at photoreceptor.
In the prior art, this push action that developer roll is pressed towards photosensitive drums, as the patent of patented claim mandate publication number CN101308351 is disclosed, realize at the bearing 18a of developer roll central shaft 17 by the direct press sleeve of extrusion spring 18b as pressing component, the periphery of bearing 18a is roughly square, as shown in Figure 1.But, since the spring energized imbalance that the factors such as twisting of extrusion spring cause, the square rim of bearing 18a, especially four corners, easily rub with the support frame that is formed at the process cartridge frame body sidewall of supporting this bearing, cause the abrasion of bearing outer rim, state such as Fig. 2 arrow A place.In addition, because square bearing 18a can't freely rotate in framework, so the central shaft 17 of bearing 18a and the developer roll that rotated by gear drive relatively rotates, and therefore, bearing inner wall also can wear away, shown in Fig. 2 arrow B.
Summary of the invention
In view of above problem, the present invention proposes a kind of imaging device, and wherein pressing component is not directly pressed the bearing of developer roll, thereby can reduce at developer roll in the process that photosensitive drums is pressed the abrasion of bearing.
The invention provides a kind of imaging device, comprising: photosensitive unit, it has photoreceptor; Developing cell, it comprises housing, developer roll and a pair of supporting platform, described developer roll is contained in the described housing, the development roll shaft two ends of this developer roll are supported in respectively the relative two side of described housing and should the development roll shaft expose on the part of two side and are separately installed with circular bearing, and described a pair of supporting platform relatively is arranged on the outside wall surface of described two side; Lay respectively at the biside plate in the outside, described two side of described two developing cells, described biside plate is oppositely arranged, and comprises a pair of development roll shaft support sector that lays respectively on the described biside plate and be oppositely arranged; And a pair of pressing component; Described photoreceptor rotatably is supported at described biside plate, described developer roll rotatably is supported on described a pair of development roll shaft support sector by described bearing, one end of described a pair of pressing component is fixedly arranged on respectively described biside plate, the other end respectively elasticity is pressed the described a pair of supporting platform of described developing cell, when described pressing component elasticity is pressed described supporting platform, described bearing moves along described development roll shaft support sector, and can rotate with respect to described development roll shaft support sector, so that described developer roll is pressed and pressure contact with it towards described photoreceptor.
According to the imaging device of above-mentioned formation, can effectively reduce the abrasion of the bearing of development roll shaft.
Description of drawings
Fig. 1 illustrates the structural representation that pressing component in the prior art is pressed bearing.
Fig. 2 is the schematic diagram that the abrasion situation of prior art centre bearer in supporting frame is shown.
Fig. 3 is the side view of formation that the chief component of the imaging device in the embodiment of the present invention is shown.
Fig. 4 is the stereographic map that the developing cell in the imaging device that Fig. 3 shows is shown.
Fig. 5 is the stereographic map that the side plate of the imaging device that Fig. 3 shows is shown.
Fig. 6 is the stereographic map that a distolateral sidewall of developing cell housing is shown.
Fig. 7 is the stereographic map that developer roll and photoreceptor crimped status are shown.
Fig. 8 is the sectional view that is illustrated in developer roll and photoreceptor.
Fig. 9 is the schematic diagram that development roll shaft support sector profile is shown.
Embodiment
Below, with reference to the accompanying drawings embodiments of the present invention are specifically described.
Fig. 3 is the formation side view that the chief component of the imaging device 1 in the embodiment of the present invention is shown.As shown in Figure 3, imaging device 1 include photosensitive unit 2, developing cell 3 and from the both end sides of photosensitive unit 2 and developing cell 3 length directions to its biside plate of supporting 4 (Fig. 3 illustrates one of them side plate).The photoreceptor 21 of photosensitive unit 2 is rotatably fixed to prop up by the sensitization axon and is held on the biside plate 4.Imaging device 1 is detachable with respect to image forming apparatus.
Fig. 4 shows the stereographic map of developing cell 3.Developing cell 3 has housing 30, and developer roll 31 is contained in the housing 30, and is supported at by development roll shaft 32 on the relative two side of housing 30.The part encapsulation that the two side is exposed at the two ends of the length direction of development roll shaft 32 has bearing 33, and bearing 33 forms circular.Relatively be provided with a pair of supporting platform 34 on the outside wall surface of the two side of the housing 30 of developing cell 3.This is used for bearing from the elasticity of pressing member 5 pressing to supporting platform 34, after will specifically describe pressing member 5.
Fig. 5 is the stereographic map that the side plate 4 of the imaging device 1 that Fig. 3 shows is shown.The side plate 4 that Fig. 5 shows is relative with a sidewall of the housing 30 of developing cell 3, and another side plate 4 that figure does not show then another sidewall with the housing 30 of developing cell 3 is relative.Description for side plate shown in Figure 54 also is applicable to another side plate that figure does not show.As shown in Figure 5, this side plate 4 is provided with for the sensitization axon support sector 42 of the sensitization axon of supporting photoreceptor 21 and supports the development roll shaft support sector 41 that development roll shaft 32 exposes the bearing 33 of installing on the part of developing cell housing 30.Also be provided with accordingly sensitization axon support sector 42 and development roll shaft support sector 41 on the side plate 4 that another figure does not show.Wherein label 5 shows pressing component 5 residing positions.Pressing component 5 one ends are fixedly arranged on side plate 4, and the other end is pressed the supporting platform 34 of the housing 30 of being located at developing cell 3.
The supporting platform 34 of 5 pairs of developing cells 3 of pressing component carries out elasticity to be pressed, so that the bearing 33 that is supported in the development roll shaft support sector 41 moves along development roll shaft support sector 41, presses towards photoreceptor 21 thereby drive developer roll 31.The elasticity of pressing component 5 is by being pressed with multiple implementation, and for example, pressing component 5 can comprise elastic rubber member cylindraceous or spiral helicine spring member for example, or other has a member that elasticity is pressed effect.
Fig. 6 is the stereographic map of a distolateral sidewall that the housing of developing cell is shown.As shown in Figure 6, one end of pressing component 5 presses on the supporting platform 34 of outside wall surface of the two side of the housing 30 that is located at developing cell 3, thereby developing cell 3 drives the developer roll 31 that is contained in wherein and presses towards photoreceptor 21 elasticity of photosensitive unit 2, realizes the pressure contact of developer roll 31 and photoreceptor 21.Fig. 7 is the stereographic map that developer roll 31 and photoreceptor 21 crimped status are shown.
Below with reference to Fig. 8 the relation of bearing 33 with development roll shaft support sector 41 described.As shown in Figure 8, circular bearing 33 is supported in the development roll shaft support sector 41 that is arranged at accordingly biside plate 4, and under the effect that the elasticity of pressing member 5 is pressed, bearing 33 can move along development roll shaft support sector 41, and bearing 33 can rotate with respect to development roll shaft support sector 41, so that developer roll 31 is pressed the state that becomes with it pressure contact towards photoreceptor 21.There is multiple implementation in development roll shaft support sector 41, for example, can be the elliptical hole that is opened in described biside plate 4, oval through hole or two D through hole, also can form have elliptical slot, the member of oval-shaped slot or two D shape grooves, as long as so that bearing 33 can in development roll shaft support sector 41, be free to slide and rotate.Fig. 9 shows the enforceable shape of several development roll shaft support sectors, and wherein, a represents that shape, the b of oval through hole or oval-shaped slot represent that shape, the c of elliptical hole or elliptical slot represent the shape of two D through holes or two D shape grooves.Because the bearing 33 of annular can be free to slide in development roll shaft support sector 41, the abrasion of the outer rim of bearing reduce, in addition, bearing 33 is driven by the friction force of development roll shaft and rotates together and can freely rotate in development roll shaft support sector 41, can effectively reduce like this abrasion that cause that relatively rotate between the inwall of bearing 33 and the development roll shaft 32.
In addition, pressing member 5 to press direction preferably consistent along the moving direction of development roll shaft support sector 41 with bearing 33, can utilize fully like this elasticity pressing force of pressing member 5, so that developer roll 31 more fully, stably with photoreceptor 21 crimping, the quality that image forms also can be improved.
As usually the arranging of prior art, also can be provided with ways on the biside plate 4 in addition, ways can guide developing cell 3 to do the motion of prescribed direction.The ways that the through hole type is arranged that prior art is commonly used.Fig. 5 shows ways 43 and is formed the through hole that is opened in accordingly on the biside plate 4.Ways 43 is used for supporting being arranged on the fulcrum on the two side of developing cell 3, so that fulcrum can move relative to ways 43.In the present embodiment, for so that developer roll 31 more stably is pressed towards photoreceptor 21, it is consistent that the fulcrum of being located at the two side of developing cell is pressed direction along the moving direction of ways and the elasticity of described pressing component.Can be with reference to the description to development roll shaft support sector 41, ways 43 can be the elliptical hole that is opened in described biside plate 4, oval through hole or two D through hole, also can form the member of the elliptical slot, oval-shaped slot or the two D shape grooves that have.Certainly, this ways also can constitute the structure that other regulations that can guide developing cell 3 to carry out certain orientation are moved.
Described imaging device is applicable to various image forming apparatus, such as printer, duplicating machine, facsimile recorder etc. in the present embodiment.
Although explain in detail and described the present invention in the explanation of accompanying drawing and front, this description is considered to illustrative rather than restrictive.Embodiment can be implemented with other various forms, in the scope that does not break away from inventive concept, can carry out various omissions, replacement, change.
Claims (10)
1. an imaging device is characterized in that, comprising:
Photosensitive unit, it has photoreceptor;
Developing cell, it comprises housing, developer roll and a pair of supporting platform, described developer roll is contained in the described housing, the development roll shaft two ends of this developer roll are supported in respectively the relative two side of described housing and should the development roll shaft expose on the part of two side and are separately installed with circular bearing, and described a pair of supporting platform relatively is arranged on the outside wall surface of described two side;
Lay respectively at the biside plate in the outside, described two side, described biside plate is oppositely arranged, and comprises a pair of development roll shaft support sector that lays respectively on the described biside plate and be oppositely arranged; And
A pair of pressing component;
Described photoreceptor rotatably is supported at described biside plate, described developer roll rotatably is supported on described a pair of development roll shaft support sector by described bearing, one end of described a pair of pressing component is fixedly arranged on respectively described biside plate, the other end respectively elasticity is pressed the described a pair of supporting platform of described developing cell
When described pressing component elasticity is pressed described supporting platform, described bearing along described development roll shaft support sector do mobile, and can rotate with respect to described development roll shaft support sector so that described developer roll towards described photoreceptor press and pressure contact.
2. imaging device as claimed in claim 1 is characterized in that, the direction that described bearing moves along described development roll shaft support sector is consistent with the direction that the elasticity of described pressing component is pressed.
3. imaging device as claimed in claim 1 is characterized in that, described development roll shaft support sector is the elliptical hole that is opened in described biside plate, oval through hole or two D through hole.
4. imaging device as claimed in claim 1 is characterized in that, described developer roll support sector forms and is located at described both sides
The member with elliptical slot, oval-shaped slot or two D shape grooves on the plate.
5. such as the described imaging device of claim 1-4, it is characterized in that, it is to be formed by described pressing component included spring or elastic caoutchouc that the described elasticity of described pressing component is pressed.
6. such as the described imaging device of claim 1-4, it is characterized in that, described biside plate also comprises respectively the sporting ways of guiding described developing cell work regulation.
7. imaging device as claimed in claim 6, it is characterized in that, described developing cell also has fulcrum on the outside wall surface that is separately positioned on described two side, corresponding with described ways, described fulcrum is supported at described ways, and can move with respect to described ways, this moving direction is consistent with the direction that the elasticity of described pressing component is pressed.
8. imaging device as claimed in claim 7 is characterized in that, described ways is the elliptical hole that is opened in described biside plate, oval through hole or two D through hole.
9. imaging device as claimed in claim 7 is characterized in that, described ways forms the member with elliptical slot, oval-shaped slot or two D shape grooves that is located on the described biside plate.
10. an image forming apparatus is characterized in that, it comprises dismountable such as imaging device as described in the claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102449581A CN102955393A (en) | 2011-08-25 | 2011-08-25 | Imaging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102449581A CN102955393A (en) | 2011-08-25 | 2011-08-25 | Imaging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102955393A true CN102955393A (en) | 2013-03-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102449581A Pending CN102955393A (en) | 2011-08-25 | 2011-08-25 | Imaging device |
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| CN (1) | CN102955393A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01149076A (en) * | 1987-12-07 | 1989-06-12 | Ricoh Co Ltd | Electrostatic recording apparatus using contact developing system |
| EP1519248A1 (en) * | 2003-09-25 | 2005-03-30 | Canon Kabushiki Kaisha | Process cartridge and electrophotographic image forming apparatus |
| US20060275052A1 (en) * | 2005-05-31 | 2006-12-07 | Brother Kogyo Kabushiki Kaisha | Process cartridge, photosensitive member cartridge, developer cartridge and developer cartridge for use in image forming apparatus |
| US20070280736A1 (en) * | 2004-04-16 | 2007-12-06 | Sharp Kabushiki Kaisha | Image Forming Apparatus |
| JP2008139818A (en) * | 2006-11-02 | 2008-06-19 | Ricoh Co Ltd | Developing device, process cartridge and image forming apparatus |
| US20090074449A1 (en) * | 2007-09-19 | 2009-03-19 | Canon Kabushiki Kaisha | Image forming apparatus |
-
2011
- 2011-08-25 CN CN2011102449581A patent/CN102955393A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01149076A (en) * | 1987-12-07 | 1989-06-12 | Ricoh Co Ltd | Electrostatic recording apparatus using contact developing system |
| EP1519248A1 (en) * | 2003-09-25 | 2005-03-30 | Canon Kabushiki Kaisha | Process cartridge and electrophotographic image forming apparatus |
| US20070280736A1 (en) * | 2004-04-16 | 2007-12-06 | Sharp Kabushiki Kaisha | Image Forming Apparatus |
| US20060275052A1 (en) * | 2005-05-31 | 2006-12-07 | Brother Kogyo Kabushiki Kaisha | Process cartridge, photosensitive member cartridge, developer cartridge and developer cartridge for use in image forming apparatus |
| JP2008139818A (en) * | 2006-11-02 | 2008-06-19 | Ricoh Co Ltd | Developing device, process cartridge and image forming apparatus |
| US20090074449A1 (en) * | 2007-09-19 | 2009-03-19 | Canon Kabushiki Kaisha | Image forming apparatus |
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Application publication date: 20130306 |