CN101097424A - Electrostatic charger - Google Patents
Electrostatic charger Download PDFInfo
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- CN101097424A CN101097424A CNA2007101096849A CN200710109684A CN101097424A CN 101097424 A CN101097424 A CN 101097424A CN A2007101096849 A CNA2007101096849 A CN A2007101096849A CN 200710109684 A CN200710109684 A CN 200710109684A CN 101097424 A CN101097424 A CN 101097424A
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- cleaning element
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- roller
- pin
- electrostatic charger
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Abstract
An electrostatic charger according to the present invention includes a needle electrode, a support, and a cleaning member. The needle electrode has a linear array of needles. The support can move along the linear array. The cleaning member is supported by the support rotatably on an axis perpendicular to the linear array. While the support is moving with the cleaning member along the linear array, the cleaning member rotates, with the needles sinking in order into and subsequently coming in order out of the cleaning member. When the cleaning member makes each rotation while moving with the support, some of the needles sink in positions into the cleaning member where any other needles did not sink when the cleaning member made the previous rotation.
Description
Technical field
The present invention relates to a kind of electrostatic charger, described electrostatic charger is used for charging on the outside surface of the photoreceptor of electrophotographic imaging forming apparatus to reach unified electromotive force.
Background technology
Electrophotographic imaging forming apparatus comprises photoreceptor and electrostatic charger, and described electrostatic charger is used for the outside surface of described photoreceptor is charged to reach unified electromotive force.Described charger can be the contactless charger that does not contact with photoreceptor.Contactless charger comprises electrode.High pressure is applied to impels electrode discharge on the electrode, so that to the outside surface charging of photoreceptor.
The charger electrode can be the needle electrode with pin.Described pin is arranged towards the direction that outside surface stretches out and move perpendicular to the surface on the edge of photoreceptor.The part pin of generation high-voltage electric field attracts the dust in the environment.A large amount of dusts on the pin stop them fully to discharge.
JP-H11-338265A discloses a kind of general electrostatic charger, and it comprises needle electrode and a pair of liner that is supported on electrode needle array both sides.Liner makes it touch pin in order along the mobile of faller gill row, thereby removes the dust on the pin.
The charger liner is made by felted terxture or analog, so it is very not flexible.This makes the most advanced and sophisticated easily deformable of electrode needle.If liner is made up of felted terxture, pin touches felted terxture and the felted terxture fiber that cuts off generation may adhere on the pin so.Liner touches the sidepiece that is parallel to the faller gill row of pin.This makes and is easy to cling dust because the generation high-voltage electric field makes most on the whole surface of needle tip in the whole surface that can not clean needle tip reliably.
The assignee of present patent application has proposed a kind of image processing system, and described image processing system comprises photoreceptor and electrostatic charger, and wherein said electrostatic charger comprises needle electrode and cleaning element.Electrode has row's pin, and each pin all stretches out towards the outside surface of photoreceptor.Cleaning element is supported movably along the pin array between the surface of electrode and photoreceptor.When cleaning element when the pin array moves, the outside surface that needle tip is absorbed in cleaning element in order shifts out from its outside surface subsequently.This makes the whole surface of needle tip touch cleaning element, thereby does not make pin distortion and do not making fiber adhere to the whole surface that can clean needle tip under the situation on the pin reliably.
Cleaning element can comprise roller and axle.Roller has the hole of a perforation, and axle is suitable for being force-fitted in the described hole.In this case, if used the environment change of electrostatic charger, if perhaps charger has used for a long time, roller may be damaged when cleaning element moves so.If roller is damaged, the efficient that cleans electrode needle so can reduce, and frequently changes the efficient that cleaning element can reduce imaging device, makes the cost of device increase.
Summary of the invention
An object of the present invention is to provide a kind of like this electrostatic charger, described electrostatic charger can not make pin distortion and not make fiber cling the whole surface of cleaning its electrode needle tip under the situation of pin reliably.
Another object of the present invention provides a kind of like this electrostatic charger, and described electrostatic charger can clean its electrode needle efficiently, and comprises the cleaning element with long life.
Electrostatic charger according to the present invention comprises needle electrode, support and cleaning element.Needle electrode has the pin of line spread.Support can move along this line spread.Cleaning element by support rotatably be supported on perpendicular to this line spread the axle on.When support when line spread moves with cleaning element, the cleaning element rotation, pin is trapped in the cleaning element and then in order to come out from cleaning element in order.When making each rotation when cleaning element moves with support, some pins are trapped in such position of cleaning element, and wherein the pin without any other is trapped in described position when cleaning element is finished last rotation.
Description of drawings
Fig. 1 is the front view that comprises according to the xsect of the image processing system of the electrostatic charger of first embodiment of the invention.
Fig. 2 A is the front view according to the xsect of the electrostatic charger of first embodiment.Fig. 2 B is that right view is amplified in the part of charger.
Fig. 3 is the enlarged side view according to the part of the electrostatic charger of first embodiment, has shown the clean operation of the clearer of charger.
Fig. 4 is the right view according to the electrostatic charger of first embodiment.
Fig. 5 is the right view according to the electrostatic charger of second embodiment of the invention.
Fig. 6 is the partial side view according to the electrostatic charger of third embodiment of the invention.
Fig. 7 is used to show that when roller is finished each rotation electrode needle enters the key diagram of the different circumferential lengths of clearer.
Fig. 8 is the front view according to the clearer of the electrostatic charger of four embodiment of the invention.
Fig. 9 A and 9B are respectively according to the side view of the rotor of the clearer of the electrostatic charger of the 4th embodiment and front view.
Fig. 9 C and 9D are side view and the front views according to the axle of the clearer of the electrostatic charger of the 4th embodiment.
Figure 10 A-10C is the front view according to the clearer of the electrostatic charger of the 4th embodiment, has shown the order of roller assembling.
Figure 11 is the front view according to the clearer of the electrostatic charger of fifth embodiment of the invention.
Embodiment
Describe with reference to the accompanying drawings and implement best mode of the present invention.
Fig. 1 has shown the image processing system 100 that comprises according to the electrostatic charger 1 of first embodiment of the invention.Device 100 is forming image on a piece of paper such as OHP or on another recording medium, and described image is the image information of selecting from duplicating machine pattern, printer mode and facsimile recorder pattern about the user.Device 100 can be on the two sides of a piece of paper print image.
A pair of pressure roller 51 (resist rollers) is supported on the S1 of paper feeding path.When the initiate key on the pressing operation panel, paper-sheets rolling wheel 22 begins paper feeding to pressure roller 51.
When the front end of paper feeding reached pressure roller 51, described pressure roller 51 did not rotate.When the end of paper between drum and transfer device 34 when being formed on the front end coupling of the toner image on the photosensitive drums 31, pressure roller begins rotation.
The view data that is read by original paper reader 10 can be through the Flame Image Process about the condition by the guidance panel input.Subsequently, view data is used as print data and is sent to laser scan unit 37.Electrostatic charger 1 charges to the face of cylinder of photosensitive drums 31 and presets electromotive force.Scanning element 37 forms electrostatic latent image via polygon prism and the surperficial mode of lens (not shown) irradiation drum by the laser beam based on view data on the charging surface of drum 31.Subsequently, the toner that is bonded on the face of cylinder of MG roller 33A of developing apparatus 33 is attracted and is bonded on the face of cylinder of drum 31 according to the lip-deep electromotive force of drum gap, makes this sub-image be counted as toner image.
After transfer step, paper is by fixing device 36, described fixing device 36 heating and push paper so as to dissolve toner image and with image fixing on paper.Subsequently, transfer roller 41 is sent to delivery tray 42 with paper.
With reference to Fig. 2 A, 2B and 4, electrostatic charger 1 comprises needle electrode 2, retainer 3, support 4, clearer 5, operating axis 6 and shell 7.Charger 1 is positioned at the top of photosensitive drums 31.
Retainer 3 is formed by resin or other insulating material, and comprises support section 3A and terminal part 3B.Support section 3A maintains needle electrode 2 and is longer than distance between both least significant end pin 2A of electrode.Dash area among Fig. 2 A is represented the shape of cross section perpendicular to the support section 3A of directions X.Maintain the terminal (not shown) among the terminal part 3B, described terminal connection electrode 2 and high-voltage power supply (not shown).
The bottom of support 4 is opened wide, and is supported on the outside of support section 3A of the end face of this part slidably.Support 4 has protruding 4A and the 4B that is right after its inner surface formation.Support section 3A is between the inner surface of support 4.Edge, the right side on support section 3A top (left side among Fig. 2 A) is between the top of support 4 inside surface and protruding 4A.The top of support section 3A and the left side of bottom (right side among Fig. 2 A) edge is between the top of support 4 inside surface and protruding 4B.This avoided support 4 with respect to support with the directions X axle on move angularly and move perpendicular to these directions.
Support 4 has the hole 4C that connects its top.The rear end of operating axis 6 is fixed among the 4C of hole.With reference to Fig. 4, the leading section of axle 6 is outstanding from the front end of retainer 3.
Shell 7 spreads all over the whole length of retainer 3 and covers support 4.Shell 7 protection needle electrodes 2.
When the terminal via terminal part 3B was applied to needle electrode 2 with high pressure, the electric field that is applied concentrated on the tip of electrode needle 2A, so that described tip is easy to discharge.This impels pin 2A to the discharge of the face of cylinder of photosensitive drums 31, presets electromotive force so that this surface is charged to.
Perpendicular to the xsect of the support section 3A of directions X is consistent between two least significant end pin 2A at least in shape.As has been elaborated, support 4 is supported on the outside of support section 3A and prevents and moving angularly on the axle of directions X and on perpendicular to these directions with respect to retainer 3.Support 4 can slide on directions X along support section 3A between two least significant end pin 2A at least.
Fig. 3 has shown the clean operation of clearer 5.The tip of electrode needle 2A is trapped in the external cylindrical surface of roller 5, and this roller is rotatably supported by support 4.When support 4 moved with roller 5 on directions X, needle tip was trapped in the roller surface in order.When roller 5 is mobile on directions X, thereby it rotates and makes pin 2A arrive the roller surface owing to drag effect.When roller 5 was mobile on each directions X, it finished repeatedly rotation.
With reference to Fig. 4, operating axis 6 is positioned at the top of electrostatic charger 1 and spreads all over the roughly whole length of retainer 3.Such as has been elaborated, the rear end of axle 6 is fixed among the hole 4C (Fig. 2 A) of support 4.Retainer 3 also is included in the installation portion 9 that its front end forms, and the shape of its outer shape and terminal part 3B much at one.Bearing element 8 is fixed on the rear end of installation portion 9.Bearing element 8 is the same with support 4, and has the hole 4C that connects its top.Support sector 9 has the supporting 9A that forms on its top.
The operator cleans needle electrode 2 by drawing handle 6A to make operating axis 6 reciprocating modes on directions X.This makes support 4 reciprocal along the support section 3A of retainer 3 with clearer 5, so the tip of electrode needle 2A is absorbed in the external cylindrical surface of rotation roller 5 in order.
When the bottom of electrode needle 2A was trapped in the clearer 5 in order or comes out from clearer 5, the whole surface of pin part touched roller 5.This has guaranteed do not make pin 2A distortion and do not making fiber adhere to the whole surface that can clean the pin part under the situation on them.
Cleaning element of the present invention is that clearer 5 is unimportant, and importantly this element is a rotor by support 4 rotatable supports.
Fig. 5 has shown the electrostatic charger 1A according to second embodiment of the invention.Charger 1A comprises the thread spindle 61 of charger 1 operating axis 6 of replacement shown in Fig. 2-4.But charger 1A also comprises as being used to make a motor with reciprocating movement 62 of the power source of 61 rotations.The support 4 of charger 1A has the threaded hole 4C that runs through its top.Threaded hole 4C engages with axle 61.
Support 4 prevents to move angularly with respect to the axle of retainer 3 on directions X.The torque axis of thread spindle 61 becomes along the power of axle traversing carriage.But motor with reciprocating movement 62 rotates thread spindle 61 so that support 4 is reciprocal on directions X on two-way.Can automated cleaning needle electrode 2 by the mode that activates motor 62 at the fixed time.
Described device 100 has power supply.But motor with reciprocating movement 62 can be small-sized and be suitable for electrostatic charger 1A.Miniature motor 62 can be electrically connected with power supply when charger 1A is installed on the device 100.Perhaps, motor 62 can be installed on the device 100.In this case, the rear end of thread spindle 61 can be with the output shaft mechanical connection of motor 62 when charger 1A is installed on the device 100.
Fig. 6 has shown the electrostatic charger 1B according to third embodiment of the invention.Except that the circumferential length of the clearer 105 of charger 1B is provided with as follows, be similar to charger 1 on the charger 1B structure.
The electrode needle 2A of electrostatic charger 1B has 15 ° inclination angle, and arranges with the needle gage P of 2.0mm.It is 1.0mm that clearer 105 is so supported so that pin 2A is absorbed in the depth capacity of this roller by support 4.When each pin 2A was trapped in the roller 105 the darklyest, the length Q on the directions X that the xsect of pin has in the external cylindrical surface place of roller calculated as follows.
Q＝2×1.0×tan(15°/2)＝0.263(mm)
The circumferential length R of clearer 105 be configured to be different from the set-point α of needle gage P and needle gage P and positive integer n product and.Circumferential length R is represented by following formula.
R＝nP+α(α≠P)
Especially, the circumferential length R of clearer 105 is set to 18.84mm (diameter is 6mm).18.84mm circumferential length R be as set-point α 0.84 with the needle gage P of 2.0mm and as 9 product of positive integer n and.
If the circumferential length R of clearer 105 is products of needle gage P and positive integer n, so when roller 105 is finished each rotation, electrode needle 2A is absorbed in the identical position, position that other electrode needle 2A is absorbed in when finishing last rotation when this roller.
The circumferential length R of clearer 105 be such so that: when finishing each rotation when this roller moves on directions X, electrode needle 2A is absorbed in when roller 105 is finished last rotation any other electrode needle 2A and is not absorbed in wherein position.This makes roller 105 can more effectively touch pin 2A, therefore can clean the tip of pin more efficiently.The damage that this has also prevented roller 105 external cylindrical surfaces has prolonged life-span of this roller whereby.
Preferably set-point is greater than the length Q on the directions X and deduct the remainder of length Q less than needle gage P.In this case, the circumferential length R of clearer 105 is represented by following formula.
R＝nP+α(Q＜α＜P-Q)
Q＜α if satisfy condition＜P-Q, α ≠ P so satisfies condition.
Fig. 7 has shown that electrode needle 2A is trapped in circumferential lengths different in the clearer when roller is finished each rotation.Finish when rotating for the first time when clearer 1 05, electrode needle 2A is trapped in the position 102 of this roller.
Under the condition of α=Q, finish when rotating for the second time when clearer 105, electrode needle 2A will be trapped in position 202.Under the condition of α＜Q, finish when rotating for the second time when roller 105, electrode needle 2A will be trapped in the position that the position 202 from Fig. 7 moves right.Especially, with this understanding, electrode needle 2A will be trapped in such position, described position with finish other electrode needle 2A is absorbed in when rotating for the first time location overlap or consistent when roller 105.
Under the condition of α=P-Q, finish when rotating for the second time when clearer 105, electrode needle 2A will be trapped in position 302.Under the situation of α＞P-Q, finish when rotating for the second time when clearer 105, electrode needle 2A will be trapped in the position that the position 302 from Fig. 7 is moved to the left.Especially, with this understanding, electrode needle 2A will be trapped in such position, described position with finish other electrode needle 2A is absorbed in when rotating for the first time location overlap or consistent when roller 105.
Such as has been elaborated, preferably: set-point α is greater than the length Q on the directions X and deduct remainder (Q＜α＜P-Q) of length Q less than needle gage P.In this case, when clearer 105 was finished each rotation, electrode needle 2A was trapped in that scope 402 position that other electrode needle 2A is absorbed in when finishing last the rotation when roller 105 in this roller is neither overlapping not to be comprised yet.This makes roller 1 05 be easy to touch the tip of pin 2A, therefore can clean described tip more efficiently.This has also prevented the damage of the external cylindrical surface of roller 105, so the life-span of this roller is longer.
Fig. 8 has shown the clearer 205 according to the electrostatic charger 1C of four embodiment of the invention.Roller 205 comprises cylindrical rotor 205A and axle 205B.Except that rotor 205A can move, be similar to charger 1 on the charger 1C structure in the specialized range of the Y direction of roller 205.The tip of the electrode needle 2A of charger 1C is trapped in the external cylindrical surface of rotor 205A.
Roll shaft 205B runs through rotor hole 205H perpendicular to directions X, and is rotatably supported by the two ends of support 204.Axle 205B is equipped with E ring 205E and 205F in the outside at the two ends of support 204. Ring 205E and 205F avoid a 205B axially to move with respect to support 204.
With reference to Fig. 9 B, for instance, the internal diameter L1 of roller rotor 205A is 3.5mm, its permissible error 0.0 and+0.5mm between.With reference to Fig. 9 B, for instance, the external diameter L2 of rotor 205A is 6.0mm, wherein permissible error-0.3 and+0.3mm between.With reference to Fig. 9 D, for instance, the diameter L3 of roll shaft 205B is 3.0mm, its permissible error-0.25 and+0.25mm between.
Spacing between the inner cylinder face of the face of cylinder of roll shaft 205B and roller rotor 205A makes that rotor is easier to move vertically with respect to axle.Because axle 205B is not press fit with rotor 205A, so even more than 205 cleaning of clearer electrode needle 2A, the external cylindrical surface of rotor also is not easy to damage.
Roll shaft 205B has the rib 205C that forms thereon, and described rib 205C is between E ring 205E and 205F.E ring 205D is fixed on the face of cylinder of the axle 205B between rib 205C and the E ring 205F.Roller rotor 205A is between rib 205C and E ring 205D.Between rib 205C and E ring 205D apart from the length K 2 of K1 greater than rotor 205A, make rotor 205A between rib 205C and E ring 205D, axially to move with respect to electrode needle 2A.
Because roller rotor 205A can axially move in specialized range with respect to electrode needle 2A, rotor moves on the Y direction when clearer 205 is mobile on directions X.Therefore, the position that is trapped among the rotor 205A of pin 2A is different on the Y direction.This has reduced pin 2A greatly and has been trapped among the rotor 205A and the frequency of coming out from rotor 205A on the same radial plane of rotor.As a result, can more effectively clean the tip of pin 2A, prevent the damage on the face of cylinder of rotor 205A, therefore prolong the life-span of roller 205.This has prevented the decline of imaging efficiency aspect and the increase of the cost aspect that caused by frequent substitution roller 205.
Figure 10 A-1OC has shown the assembling sequence of clearer 205.For instance, roller 205 can be assembled in the following manner.At first, will be inserted among the rotor hole 205H away from the end of the roll shaft 205B of rib 205C.Secondly, E ring 205D is fixed on the assigned address of this axial region.Next, the end of axle 205B is inserted in the hole at support 204 two ends.Next, E ring 205E and 205F are fixed on the axle 205B in support 204 outsides.
In the fabrication phase that rib 205C is integrally formed with roll shaft 205B, make rib 205C be accurately positioned with respect to axle.So accurately be provided with one of a plurality of extreme positions, roller rotor 205A axially moves with respect to electrode needle 2A between described extreme position.In assembling stage location, E is encircled 205D and be fixed on the 205B, therefore be easy to calibration at other extreme position of this stage.As a result, extreme position accurately is set.
Between the face of cylinder of the inner peripheral surface of rotor hole 205H and roll shaft 205B, can insert supporting or other sliding members, so roller rotor 205A can axially move with respect to electrode needle 2A.
Figure 11 has shown the clearer 305 according to the electrostatic charger 1D of fifth embodiment of the invention.Roller 305 comprises rotor 305A, axle 305B and as the pressure spring 305G of flexible member.Except that rotor 305A is the truncated cone of axial bias, be similar to charger 1C on the charger 1D structure.
The rib 305C of roll shaft 305B is near the end of roller rotor 305A, on the described end diameter less than the other end.Axle 305B between the abutting end of pressure spring 305G bigger rotor-end and support 204 on the diameter.Spring 305G is towards as the rib 305C of retainer bias rotor 305A axially.
Mobile on directions X when clearer 305, when electrode needle 2A was trapped among the roller rotor 305A simultaneously, pin 2A was to the trochoidal surface pressurization of rotor 305A.With respect to the biasing force of pressure spring 305G, pressure impels rotor 305A axially away from rib 305C.As a result, pin 2A is absorbed in along the helical on the rotor surface.
When support 204 has moved on to the end of support section 3A, do not have electrode needle 2A to be trapped in roller rotor 305A, so the biasing force of pressure spring 305G impel rotor to move axially towards rib 305C.When support 204 was moved to the other end by this end from support section 3A, pin 2A was absorbed in once more along the helical of the coned face of rotor 305A.
This has reduced the frequency that electrode needle 2A is trapped in such position greatly, and described position is identical with the position that other electrode needle 2A has been trapped among the roller rotor 305A.As a result, can more effectively clean pin 2A, and prevent the damage of the conical surface of rotor 305A, therefore prolong the life-span of clearer 305.
The above-mentioned explanation of embodiment should be considered to illustrate various aspects, is nonrestrictive.Scope of the present invention is defined by claims, but not is defined by embodiment, and is intended to comprise the equivalents and all modifications in the claim scope of scheme in the claim.
Claims (9)
1. electrostatic charger comprises:
Needle electrode with pin of line spread;
Along this line spread support movably; And
Rotatably be supported on perpendicular to the cleaning element on the axle of this line spread by support;
Wherein, when support with cleaning element when line spread moves, the cleaning element rotation is trapped in the cleaning element and subsequently to come out from this cleaning element in order with hour hands in order; And
Wherein, when cleaning element was finished each rotation when moving with support, some pins were trapped in position such in the cleaning element, and wherein the pin without any other is absorbed in this position when cleaning element is finished last rotation.
2. electrostatic charger according to claim 1, wherein said cleaning element comprises:
Axle by stent support; And
Has the rotor that connects the boring that forms;
This runs through the boring perpendicular to described line spread;
This rotor can move in specialized range along this axle.
3. electrostatic charger according to claim 2 wherein is formed with the gap between the inner peripheral surface of the outer peripheral face of described axle and described rotor.
4. electrostatic charger according to claim 2 also comprises being arranged on being used to limit the limiter that described rotor moves in specialized range along axle on the described axle.
5. electrostatic charger according to claim 4, wherein said limiter are the ribs that forms on the outside surface of described axle.
6. electrostatic charger according to claim 4, wherein said limiter are the retainers that is fixed on the described axle.
7. electrostatic charger according to claim 1, wherein said cleaning element has such circumferential length, so that: when this cleaning element is finished each rotation when described line spread moves, some pins are trapped in position such in this cleaning element, and wherein the pin without any other is trapped in described position when cleaning element is finished last rotation.
8. electrostatic charger according to claim 7, wherein said pin are with constant spacing arrangement, and the circumferential length of wherein said cleaning element is to be different from the set-point of this spacing and the sum of products of this spacing and positive integer.
9. electrostatic charger according to claim 8, the length that wherein said set-point parallels with line spread at cleaning element outer peripheral face place greater than the cross section that sinks into each pin in the cleaning element the darklyest, and deduct the remainder of the length that is parallel to line spread for less than described spacing fixed number.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006178681 | 2006-06-28 | ||
| JP2006178681A JP4241770B2 (en) | 2006-06-28 | 2006-06-28 | Charging device |
| JP2006178682 | 2006-06-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101097424A true CN101097424A (en) | 2008-01-02 |
| CN100561369C CN100561369C (en) | 2009-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101096849A Active CN100561369C (en) | 2006-06-28 | 2007-06-27 | Electrostatic charger |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4241770B2 (en) |
| CN (1) | CN100561369C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106527074A (en) * | 2015-09-09 | 2017-03-22 | 夏普株式会社 | Charging device, image forming unit, and image forming apparatus |
| CN107436546A (en) * | 2016-05-25 | 2017-12-05 | 夏普株式会社 | Corona discharge assembly and the image processing system for possessing the corona discharge assembly |
-
2006
- 2006-06-28 JP JP2006178681A patent/JP4241770B2/en active Active
-
2007
- 2007-06-27 CN CNB2007101096849A patent/CN100561369C/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106527074A (en) * | 2015-09-09 | 2017-03-22 | 夏普株式会社 | Charging device, image forming unit, and image forming apparatus |
| US10268134B2 (en) | 2015-09-09 | 2019-04-23 | Sharp Kabushiki Kaisha | Charging device, image forming unit comprising the same, and image forming apparatus comprising the same |
| CN106527074B (en) * | 2015-09-09 | 2019-10-11 | 夏普株式会社 | Charging system, image forming unit and image forming apparatus |
| CN107436546A (en) * | 2016-05-25 | 2017-12-05 | 夏普株式会社 | Corona discharge assembly and the image processing system for possessing the corona discharge assembly |
| CN107436546B (en) * | 2016-05-25 | 2020-11-20 | 夏普株式会社 | Corona discharge device and image forming apparatus including the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100561369C (en) | 2009-11-18 |
| JP4241770B2 (en) | 2009-03-18 |
| JP2008009088A (en) | 2008-01-17 |
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