WO2013029450A1 - 处理盒 - Google Patents

处理盒 Download PDF

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Publication number
WO2013029450A1
WO2013029450A1 PCT/CN2012/079360 CN2012079360W WO2013029450A1 WO 2013029450 A1 WO2013029450 A1 WO 2013029450A1 CN 2012079360 W CN2012079360 W CN 2012079360W WO 2013029450 A1 WO2013029450 A1 WO 2013029450A1
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WO
WIPO (PCT)
Prior art keywords
photosensitive drum
sleeve
magnetic
waste toner
sealing member
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Application number
PCT/CN2012/079360
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English (en)
French (fr)
Inventor
朱小磊
鲁建军
Original Assignee
珠海天威飞马打印耗材有限公司
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Publication of WO2013029450A1 publication Critical patent/WO2013029450A1/zh

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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/18Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
    • G03G21/1803Arrangements or disposition of the complete process cartridge or parts thereof
    • G03G21/1814Details of parts of process cartridge, e.g. for charging, transfer, cleaning, developing
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/10Collecting or recycling waste developer
    • G03G21/12Toner waste containers
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/18Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
    • G03G21/1803Arrangements or disposition of the complete process cartridge or parts thereof
    • G03G21/1828Prevention of damage or soiling, e.g. mechanical abrasion
    • G03G21/1832Shielding members, shutter, e.g. light, heat shielding, prevention of toner scattering

Definitions

  • the present invention relates to a process cartridge used in an image forming apparatus such as a copying machine, a printer, or a facsimile machine which forms an image by electrophotographic processing.
  • the present invention is based on a Chinese invention patent application filed on Aug. 30, 2011, and the application number is 201110252016.8, the content of which is incorporated herein by reference.
  • a conventional processing cartridge for a laser printer is mainly composed of a developing unit and an image forming unit, and the two units can perform mutual rotation of a small angle range around the same rotating shaft.
  • the developing unit mainly includes a toner hopper 5, a stirring frame 4, a powder feeding roller 3, a developing roller 2, and a toner thickness regulating plate 6, all of which are disposed in the developing frame 7.
  • the image forming unit mainly includes a waste toner box 8, a photosensitive drum 1, a charging roller 9, and a cleaning blade 10, all of which are disposed in the cleaning frame 11.
  • the toner hopper 5 provides a storage space of the toner and a suitable toner conveying passage; the stirring frame 4 uniformly distributes the toner to be used for the developing roller 2 by its own rotation; the powder feeding roller 3 passes the rotation The toner is conveyed onto the developing roller 2; the toner thickness adjusting plate 6 supplies a toner thickness adjusting function to the developing roller 2; the developing roller 2 is adjacent to the photosensitive drum 1, and the toner is adsorbed to the photosensitive drum 1 by the opposite polarity charge action The area of the electrostatic latent image on it.
  • the cylindrical surface of the charging roller 9 is pressed tightly against the cylindrical surface of the photosensitive drum 1, and a charging function is provided to the photosensitive drum 1, so that the photosensitive region of the photosensitive drum 1 carries the polarity of the charge adsorbed by the polarity and the carbon powder.
  • the same electric charge; one end of the cleaning blade 10 is in frictional contact with the cylindrical surface of the photosensitive drum 1, for scraping off the residual toner on the photosensitive drum 1, thereby ensuring the cleaning of the photosensitive drum 1.
  • the existing toner can be divided into a chemical synthesis method and a physical powder method according to a processing method.
  • the carbon powder prepared by the physical powder method generally comprises the present vinyl resin, wax, silicon powder, additive, magnetite and lubricating powder.
  • the carbon powder used in the above process cartridge is magnetic carbon powder prepared by physical pulverization, or other magnetic carbon powder with magnetic properties.
  • a A cleaning device includes a cleaning blade and a cleaning roller disposed under the cleaning blade, the cleaning roller being disposed upstream of the cleaning blade as viewed in a rotational direction of the photosensitive drum.
  • the cleaning roller is slidably in contact with the surface of the photosensitive drum and rotates as the photosensitive drum rotates to remove waste toner adhered from the surface of the photosensitive drum and dust from the paper, so that the cleaning blade can more easily clean the surface of the photosensitive drum.
  • 4,402,103 discloses a cleaning roller comprising a rotatable sleeve having a brush-like structure in contact with the photosensitive drum, the sleeve being internally provided with a plurality of a fixed magnet having a magnetic pole facing the photosensitive drum; an auxiliary cleaning roller disposed adjacent to the cleaning roller, the auxiliary cleaning roller can remove the waste toner on the cleaning roller, and the waste toner attached to the auxiliary cleaning roller is passed through a cleaner Scrape into a container that contains waste toner.
  • the cleaning roller removes the waste toner on the photosensitive drum by the brush on the sleeve, and the magnetic force generated by the internal magnet can also attract the waste toner on the photosensitive drum to the surface of the cleaning roller, thereby more effectively removing the photosensitive drum.
  • the cleaning roller is only such that the tip of the brush attached thereto slightly contacts the surface of the photosensitive drum, and does not exert excessive pressure on the surface of the photosensitive drum, so that the surface of the photosensitive drum is not deformed to affect the print quality.
  • U.S. Patent No. 4,436,412 also discloses a photosensitive drum cleaning apparatus comprising a magnetic cleaning roller having a brushless structure on its surface, the magnetic cleaning roller being internally provided with a fixed magnet, and a rotary sleeve disposed externally, through a magnet The magnetic force attracts the waste toner on the photosensitive drum to the surface of the sleeve to achieve the purpose of cleaning the photosensitive drum.
  • a brush cleaning roller having a brush attached to the surface is further disposed between the magnetic cleaning roller and the photosensitive drum transfer region, and the brush cleaning roller can transmit light, and the brush contacts the surface of the photosensitive drum and rotates therewith.
  • the cleaning device further includes a waste toner container, and when the waste toner on the magnetic cleaning roller is accumulated to a certain extent, it is transported to the waste toner container through a waste toner conveying device for storage.
  • U.S. Patent No. 7,340,203 also discloses a photosensitive drum cleaning device which also removes waste toner from the surface of the photosensitive drum by a magnetic roller having a fixed permanent magnet disposed therein, in the downstream direction of rotation of the magnetic roller sleeve.
  • a scraper is provided at a distance from the surface of the sleeve for scraping off the waste toner adhering to the surface of the sleeve.
  • a photosensitive drum cleaning device that cleans the surface of the photosensitive drum by the magnetic force of the magnetic roller is disclosed in the above-mentioned patent documents US Pat. No. 4,402,103, US Pat. No. 4,436,412, and US Pat.
  • the structure of these cleaning devices is complicated, and the requirements for manufacturing and installation are high, which is disadvantageous for the production cost.
  • the present invention provides a process cartridge comprising a photosensitive drum, a waste toner hopper for accommodating waste toner removed from the photosensitive drum, a rectangular waste toner hopper opening parallel to the axis of the photosensitive drum, and a cleaning roller, Provided in a gap with the drum axis parallel to each other at the waste toner box opening;
  • the cleaning roller includes a shaft core fixed to the waste toner box and a sleeve mounted on the shaft core and rotatable relative to the shaft core;
  • the shaft core is axially
  • the magnetic force generating device facing the photosensitive drum is provided on the cross section, so that the sleeve faces the surface of the photosensitive drum to form a magnetic surface, and generates magnetic force for adsorbing the waste powder attached to the surface of the photosensitive drum to the magnetic surface;
  • the sleeve and the waste powder a gap between the two long sides of the opening of the cartridge is respectively provided with a first sealing member and a second sealing member which are in elastic contact with
  • the magnetic surface of the cleaning roller sleeve includes a contact portion of the sleeve with the first sealing member, and a magnetic force at a contact portion of the sleeve with the first sealing member is greater than a first sealing member for the surface of the sleeve Friction.
  • the above design causes the cleaning roller sleeve to have a magnetic force at a contact portion with the first sealing member, and the magnetic force can firmly adsorb the waste toner removed from the surface of the photosensitive drum to the surface of the sleeve, and the magnetic force is greater than the first sealing member Friction on the surface of the sleeve to prevent the waste powder from being scraped off when passing through the first seal, resulting in re-contamination of the photosensitive drum.
  • the magnetic force generating device in the cleaning roller is a permanent magnet.
  • the cleaning roller utilizes a permanent magnet as a magnetic force generating device, which is advantageous in cost saving, and does not require consumption of extra energy, and is also convenient for energy saving.
  • the magnetic field of the magnetic surface of the cleaning roller sleeve is equal to or larger than the length of the photosensitive latent image forming region of the photosensitive drum in the axial direction of the sleeve.
  • This design can better absorb the waste toner or other magnetic substances on the surface of the drum to the surface of the sleeve, improving the cleaning efficiency.
  • the cleaning roller sleeve can be made of an insulating material to ensure a better cleaning effect; and the second sealing member can be made of felt or sponge, which can save cost.
  • the cleaning roller of the process cartridge of the present invention adsorbs the magnetic toner remaining on the surface of the photosensitive drum by magnetic force or the magnetic substance such as a magnetic medium for transporting the carbon powder by magnetic force, thereby achieving cleaning of the surface of the photosensitive drum; Does not contact the surface of the photosensitive drum, so as not to adversely affect the surface of the photosensitive drum; at the same time, the cleaning roller has a first sealing member and a second sealing member which are simple in structure, and is convenient to install, and also prevents waste powder from the waste toner cartridge
  • the sleeve of the cleaning roller has no magnetic force at the contact portion with the second sealing member, and the second sealing member can conveniently scrape the waste powder adhering to the surface of the sleeve, thereby achieving cleaning of the cleaning roller.
  • Figure 1 is a schematic cross-sectional view showing the structure of a conventional process cartridge
  • FIG. 2 is a schematic view showing the working principle of cleaning the surface of the photosensitive drum by the cleaning roller in the process cartridge according to the embodiment of the present invention
  • Figure 3 is a schematic view showing the structure of the cleaning roller of Figure 2, and a partial view of the working principle of cleaning the surface of the photosensitive drum;
  • Figure 4 is a front elevational view of the cleaning roller in the embodiment of the present invention.
  • Figure 5 is a perspective view showing the gear fit between the cleaning roller and the photosensitive drum in the embodiment of the present invention.
  • FIG 2 The operation principle of the photosensitive drum cleaning device of the process cartridge of the embodiment of the present invention is shown.
  • the photosensitive drum 10, the waste toner box 61, the cleaning roller 50, and the charging roller 20 are disposed in the cleaning frame 60.
  • the developing roller 30 forms a toner image 11 on the surface of the photosensitive drum 10 by a developing operation.
  • the toner image 11 is transferred onto the image forming medium 80 by the transfer operation of the transfer roller 40 while passing through the image forming medium 80, for example, paper, to form a printed image.
  • the surface of the photosensitive drum 10 is continuously adsorbed on the surface of the photosensitive drum 10 by the electrostatic electric field force on the surface of the photosensitive drum 10 due to the magnetic property remaining on the surface of the photosensitive drum 10. It is then rotated and moved closer to the cleaning roller 50 located downstream of the transfer working area.
  • the cleaning roller 50 is located at the opening 62 of the waste toner box 61. A gap is maintained between the surface of the cleaning roller 50 and the surface of the photosensitive drum 10, and a cleaning region is formed in a certain area closest to the photosensitive drum 10, in which the cleaning roller of the residual toner 12 on the surface of the photosensitive drum 10 is received.
  • the magnetic field force of 50 is larger than the electrostatic electric field force of the photosensitive drum 10.
  • the residual toner 12 When the residual toner 12 enters the cleaning area, it moves from the surface of the photosensitive drum 10 to the surface of the cleaning roller 50 by the magnetic force, thereby completing the cleaning of the surface of the photosensitive drum 10.
  • the residual carbon powder 12 is doped with other magnetic components, for example, some of the carbon powders contain magnetic carriers, and the magnetic carriers are responsible for transporting the toner to the target body, in which case This magnetic carrier can also be attracted by the magnetic force on the cleaning roller 50 and removed from the surface of the photosensitive drum 10.
  • the opening 62 is rectangular, and two slits are formed between the long side and the cleaning roller 50.
  • a first sealing member 70 and a second sealing member 80 are respectively disposed.
  • One end of the first sealing member 70 is fixed to the upper long side of the opening 62, and the other end is in sliding contact with the surface of the cleaning roller 50;
  • the second sealing member 80 is fixed at one end to the lower long side of the opening 62 and the other end to the surface of the cleaning roller 50. Sliding contact.
  • the cleaning roller 50 rotates in a direction opposite to the photosensitive drum 10, and the first sealing member 70 is located downstream of the second sealing member 80 in the rotational direction of the cleaning roller 50.
  • the first sealing member 70 and the second sealing member 80 can seal the waste toner hopper 61, preventing the residual waste toner 12 in the waste toner hopper 61 from leaking out, thereby re-contaminating the surface of the photosensitive drum 10.
  • the photosensitive drum 10 After passing through the cleaning roller 50, the photosensitive drum 10 is recharged by the charging roller 20 to form a new electronic latent image on the surface of the photosensitive drum 10, and then enters the developing area, and is developed by the developing roller 30, thereby entering a new round of imaging cycle.
  • FIG. 3 shows the structure of the cleaning roller 50 and its cleaning operation principle for the photosensitive drum 10.
  • the cleaning roller 50 includes a shaft core 51 and a sleeve 52 outside the shaft core.
  • the shaft core 51 is fixed to the process cartridge casing, and the surface of the sleeve 52 is smooth, with the shaft core 51 as an axis and rotated relative to the shaft core 51.
  • the magnetic force generating means 512 is provided on the side of the axial core 51 adjacent to the photosensitive drum 10 as viewed in the axial direction, and the magnetic force generating means 512 is a permanent magnet. In other embodiments, the magnetic force generating device may also be an electromagnet.
  • the magnetic force generating means 512 extends in the axial direction of the cleaning roller 50, and has the same polarity on the side close to the sleeve 52, and the polarity may be either the S pole or the N pole.
  • the magnetic force generating means 512 is arranged to satisfy the following requirements: 1. It forms a cleaning area between the surface of the sleeve 52 and the surface of the photosensitive drum 10, and the magnetic force of the cleaning area is sufficient to overcome the attraction of the photosensitive drum 10 to the residual toner 12. And the residual toner 12 is adsorbed on the surface of the sleeve 52; 2.
  • the length of the cleaning region in the axial direction of the sleeve 52 should be equal to or greater than the length of the surface of the photosensitive drum 10 forming the electron latent image; 3.
  • the magnetic property generated The force should cover the contact portion a of the first sealing member 70 on the surface of the cleaning roller 50, and the magnetic force here should be greater than the frictional force of the first sealing member 70 here; The magnetic force generated by it does not cover the contact portion b of the second seal member 80 on the surface of the cleaning roller 50.
  • the surface of the sleeve 52 forms two regions of the magnetic surface and the non-magnetic surface in the circumferential direction, and the magnetic surface thereof can be between the surface of the sleeve 52 and the surface of the photosensitive drum 10.
  • the cleaning area is formed, and the length of the cleaning area in the axial direction should be equal to or larger than the length of the surface of the photosensitive drum 10 forming the electron latent image area; and the contact portion a is in the range of the magnetic surface, and the contact portion b is in the range of the non-magnetic surface.
  • the advantage of this arrangement is that after the cleaning operation of the photosensitive drum 10 is completed, as the sleeve 52 rotates, the residual toner 12 first passes through the first sealing member 70, and since the magnetic surface is there, the magnetic force is greater than the first
  • the sealing seal 70 contacts the surface of the cleaning roller 50 to form a frictional force that can adsorb the residual toner 12 on the surface of the cleaning roller 50 so as not to be scraped off by the first sealing member 70, thereby causing residual carbon.
  • the powder 12 is smoothly conveyed into the waste toner box 61; and at the contact portion b, since there is no magnetic force here, there is no magnetic force, and the residual toner 12 is easily scraped off into the waste toner box 61 by the second seal.
  • the residual toner 12 is prevented from leaking out.
  • part of the residual toner 12 is naturally dropped into the waste toner box because of the attraction without magnetic force.
  • an additional cleaning device such as a blade, a brush, or the like may be disposed in the waste toner box 61 to scrape the residual toner of the non-magnetic surface into the waste toner box 61.
  • the first sealing member 70 extends in the axial direction of the sleeve 52, and the length is greater than or equal to the length of the magnetic surface of the sleeve 52.
  • the material is preferably a thin, flexible plastic blade. While ensuring good sealing performance, no excessive pressure is generated on the surface of the sleeve 52; the second sealing member 80 also extends in the axial direction of the sleeve 52, and the length is greater than or equal to the non-magnetic surface of the sleeve 52.
  • the length, the material is preferably felt or sponge, so that it can be in close contact with the surface of the sleeve 52, thereby effectively scraping the residual toner 12 adsorbed on the surface of the sleeve 52, and using felt or sponge as a material, can also be low in cost. .
  • the cleaning roller 50 which includes a core 51 and a sleeve 52, and both ends of the core 51 are provided with protrusions 54 having arcuate or half-moon grooves for fixing
  • the shaft core 51 prevents rotation thereof;
  • the sleeve 52 is provided at one end with a gear 53 that meshes with the gear 12 at one end of the photosensitive drum 10 and is rotated by the gear 12 to drive the rotation of the sleeve 52.
  • the sleeve 52 may be made of an insulating material, which can reduce or prevent static electricity generated during friction with the first seal and the second seal, thereby improving cleaning efficiency.
  • the present invention is not limited to the above technical solutions.
  • the number of magnetic force generating devices may vary, and the position and arrangement method thereof may also be changed.
  • the thickness of the sleeve may be adjusted according to the required magnetic force, etc. .
  • Such changes and equivalent transformations are intended to be included within the scope of the claims.
  • the photosensitive drum cleaning device provided by the invention has a simple structure, is convenient for processing and installation, and the cleaning effect is greatly improved.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Sustainable Development (AREA)
  • Cleaning In Electrography (AREA)

Abstract

一种处理盒,包括:感光鼓(10);废粉仓(61);清洁辊(50);相对废粉仓(61)固定的轴芯(51)及可旋转的套筒(52);轴芯(51)上设有磁性力发生装置(512),使套筒(52)面向感光鼓(10)的部分表面形成磁性面;套筒(52)与废粉仓(61)开口(62)两个长边之间的间隙处,设置有与套筒(52)表面弹性接触的第一密封件(70)和第二密封件(80);套筒(52)还包括无磁性面,第二密封件(80)与无磁性面弹性接触,第一密封件(70)与磁性面弹性接触;废粉在第一密封件(70)与磁性面接触处受到的磁性力大于第一密封件(70)对废粉的摩擦力。

Description

处理盒
本发明涉及通过电子照相处理形成图像的复印机,打印机,传真机等图像形成装置中使用的处理盒。本发明基于申请日为2011年08月30日、申请号为201110252016.8的中国发明专利申请,该申请的内容作为与本发明密切相关的参考文献引入本文。
习知的一种激光打印机用处理盒主要由显影单元和成像单元构成,两单元绕同一旋转轴可以进行小角度范围的相互转动。如图1所示,显影单元主要包括碳粉仓5、搅拌架4、送粉辊3、显影辊2及碳粉厚度调节板6,这五个部件均设置于显影框架7内。成像单元主要包括废粉仓8、感光鼓1、充电辊9和清洁刮刀10,四者均设置于清洁框架11内。
显影单元中,碳粉仓5提供碳粉的储藏空间和适宜的碳粉输送通道;搅拌架4通过自身的旋转使输往显影辊2的待用碳粉均匀分布;送粉辊3通过旋转把碳粉输送到显影辊2上;碳粉厚度调节板6对显影辊2提供碳粉厚度调节功能;显影辊2毗邻于感光鼓1,通过极性相反的电荷作用使碳粉吸附于感光鼓1上的静电潜像区域。
成像单元中,充电辊9的圆柱表面紧紧地压靠于感光鼓1的圆柱表面,并对感光鼓1提供充电功能,使感光鼓1光敏区域携带上极性与碳粉吸附的电荷极性相同的电荷;清洁刮刀10的一端与感光鼓1的圆柱表面摩擦接触,用以刮除感光鼓1上的残余碳粉,从而保证感光鼓1的清洁。
现有的碳粉按加工方法可分为化学合成法和物理粉粹法。其中采用物理粉粹法制成的碳粉其组成成分通常包括本乙烯树脂、腊、硅粉、添加剂、磁铁矿、润滑粉。上述处理盒中使用的碳粉就是采用物理粉碎法制成的磁性碳粉,或者其他带有磁性的磁性碳粉。
上述处理盒中仅通过清洁刮刀清洁感光鼓,在打印量大时,由于清洁刮刀的清理能力有限,常常会出现感光鼓表面清洁不干净的问题,因此,在美国专利US5617194中,公开了一种清洁装置,该清洁装置包括清洁刮刀和设置在清洁刮刀下方的清洁辊,沿感光鼓的旋转方向看,该清洁辊设置在清洁刮刀的上游。该清洁辊与感光鼓表面可滑动地接触,并随着感光鼓的旋转而旋转,用以移除感光鼓表面附着的废粉和来自纸张的灰尘,以便清洁刮刀更容易的清洁感光鼓表面。
但是,上述清洁辊由于要长期抵压在感光鼓表面,容易使感光鼓表面磨损或者发生细微形变,从而影响成像质量。为了解决这一问题,美国专利US4402103公开了一种清洁辊,该清洁辊包括一个可转动的套筒,表面上设置有与感光鼓接触的类似毛刷的结构,该套筒内部设置有多个固定的磁铁,其磁极朝向感光鼓;紧挨着该清洁辊还设置有附属清洁辊,该附属清洁辊可以清除清洁辊上的废粉,并通过一个清除器将附属清洁辊上附着的废粉刮除到一个容纳废粉的容器中。该清洁辊一方面通过套筒上的毛刷清除感光鼓上的废粉,同时其内部磁铁产生的磁性力也能将感光鼓上的废粉吸引到清洁辊表面,从而更高效的清除感光鼓上附着的废粉。这种清洁辊只是其上附着的毛刷尖端轻微接触感光鼓表面,不会对感光鼓表面产生过大压力,因而不会致使感光鼓表面生产形变而影响打印质量。
美国专利US4436412也公开了一种感光鼓清洁装置,该装置包括一个表面没有毛刷结构的磁性清洁辊,该磁性清洁辊内部设置有固定的磁铁,外部设置有可转动的套筒,通过磁铁的磁性力将感光鼓上的废粉吸引到套筒表面从而达到清洁感光鼓的目的。在磁性清洁辊和感光鼓转印区域之间还设置有一个表面附着有毛刷的毛刷清洁辊,该毛刷清洁辊可以透光,其毛刷与感光鼓表面接触,并随之转动,其内部设置有一个电荷消除灯,用于消除感光鼓上附着废粉的电荷,从而在磁性清洁辊之前对感光鼓进行初次清洁。该清洁装置还包括一个废粉容纳器,磁性清洁辊上的废粉积累到一定程度时,就通过一个废粉输送装置被输送到废粉容纳器中储存。
美国专利US7340203也公开了一种感光鼓清洁装置,该清洁装置也是通过一个内部设置有固定的永磁铁的磁性辊的来清除感光鼓表面的废粉,在该磁性辊套筒旋转的下游方向还设置有一个与套筒表面间隔一定距离的刮除器,用以刮除附着在该套筒表面积累的废粉。
上述专利文献US4402103、US4436412和US7340203均公开了利用磁性辊的磁场力对感光鼓表面进行清洁的感光鼓清洁装置。但是,这些清洁装置的的结构复杂,对制造和安装的要求高,不利于生产成本的节约。
为了解决上述问题,本发明的主要目的是提供一种具有结构简单、安装方便、成本低廉的感光鼓清洁装置的处理盒。
为实现上述目的,本发明提供的处理盒,包括感光鼓;废粉仓,用于容纳从感光鼓上清除下来的废粉,具有与感光鼓轴线平行的矩形的废粉仓开口;清洁辊,与感光鼓轴线平行相互保持间隙地设置在废粉仓开口处;清洁辊包括相对废粉仓固定的轴芯及一安装在轴芯上并可相对轴芯旋转的套筒;轴芯在轴向横截面上设有面向感光鼓的磁性力发生装置,使套筒面向感光鼓的部分表面形成磁性面,并产生将感光鼓表面附着的废粉吸附到磁性面的磁性力;套筒与废粉仓开口两个长边之间的间隙处,分别设置有与套筒表面弹性接触的第一密封件和第二密封件;套筒还包括无磁性面,第二密封件与无磁性面弹性接触,第一密封件与磁性面弹性接触;套筒与第一密封件接触的部分的旋转方向为从废粉仓外向废粉仓内。
进一步的,该清洁辊套筒的磁性面包括套筒与第一密封件的接触部分,并且在套筒与所述第一密封件的接触部分的磁性力大于第一密封件对套筒表面的摩擦力。
上述设计使清洁辊套筒在与第一密封件的接触部分具有磁性力,该磁性力能将从感光鼓表面清除的废粉紧紧吸附在套筒表面,并且该磁性力大于第一密封件在套筒表面的摩擦力,以防止废粉在经过第一密封件时被刮除,而导致重新污染感光鼓。
进一步的,该清洁辊中的磁性力发生装置为永磁铁。
该清洁辊利用永磁铁作为磁性力发生装置,有利于节约成本,同时,不需要消耗额外的能量,也便于节能。
进一步的,该清洁辊套筒磁性面的磁场范围在套筒的轴线方向上等于或大于感光鼓电子潜像形成区域的长度。
这种设计能将感光鼓表面的废粉或其他磁性物更好的吸附到套筒表面,提高清洁效率。
另外,该清洁辊套筒可采用绝缘材料,能保证较好的清洁效果;而且,第二密封件可采用毛毡或海绵,能节约成本 。
本发明处理盒的清洁辊通过磁性力吸附感光鼓表面附着的经过转印后残留下来的磁性碳粉或者用于运送碳粉的磁性介质等磁性物,从而实现对感光鼓表面的清洁;其表面不接触感光鼓表面,从而不会对感光鼓表面产生不利影响;同时,该清洁辊还具有结构简单的第一密封件和第二密封件,安装方便,同时也能防止废粉从废粉仓中泄露;而且,清洁辊的套筒在与第二密封件的接触部分没有磁性力,第二密封件可以方便的刮除附着在套筒表面的废粉,从而实现清洁辊的清洁。
图1是现有处理盒结构的横截面示意图;
图2是反映本发明实施例的处理盒中清洁辊对感光鼓表面进行清洁的工作原理示意图;
图3是图2中清洁辊的结构示意图,和其对感光鼓表面进行清洁的工作原理局部图;
图4是本发明实施例中清洁辊的正视图;
图5是本发明实施例中清洁辊与感光鼓之间齿轮配合情况的立体图。
以下结合附图及实施例对本发明作进一步说明。
由于本发明处理盒实施例的主要构造与现有处理盒相同,现仅对本发明对现有处理盒的改进部分加以重点说明。
图2 显示了本发明实施例的处理盒感光鼓清洁装置的工作原理。清洁框架60中设置有感光鼓10、废粉仓61、清洁辊50和充电辊20。显影辊30通过显影作业,在感光鼓10表面形成碳粉图像11。随着感光鼓10的旋转,在经过成像介质80,例如纸张时,通过转印辊40的转印作业,将碳粉图像11转印到成像介质80上形成打印图像。感光鼓10经过转印后,其表面通常会残留未转印完全的碳粉12,残留碳粉12由于具有磁性,会在感光鼓10表面静电电场力的作用下继续吸附在感光鼓10的表面并随之旋转移动,而逐渐靠近位于转印作业区域下游的清洁辊50。清洁辊50位于废粉仓61的开口62处。清洁辊50表面与感光鼓10表面之间保持一定间隙,并在最靠近感光鼓10的一定区域内形成清洁区域,在该清洁区域内,感光鼓10表面的残留碳粉12所受到的清洁辊50的磁场力大于感光鼓10的静电电场力。当残留碳粉12进入清洁区域时,在磁性力的作用下,从感光鼓10表面移动到清洁辊50表面,从而完成对感光鼓10表面的清洁。在其他实施例中,如果残留碳粉12中掺杂有其他磁性成分,例如,有一些碳粉中包含磁性载体,这些磁性载体承担着把碳粉运送到目标体上的作用,这种情况下,这种磁性载体也可以被清洁辊50上的磁性力吸引,而被从感光鼓10表面上清除。
开口62为矩形,其长边与清洁辊50之间形成有两个狭长的间隙,为了密封这两个间隙,分别设置有第一密封件70和第二密封件80。第一密封件70的一端固定于开口62的上长边处,另一端与清洁辊50表面滑动接触;第二密封件80一端固定于开口62的下长边处,另一端与清洁辊50表面滑动接触。清洁辊50以与感光鼓10相反的方向旋转,在清洁辊50的旋转方向上,第一密封件70位于第二密封件80的下游。第一密封件70和第二密封件80能密封废粉仓61,防止废粉仓61中的残留废粉12泄露出来,从而重新污染感光鼓10表面。
感光鼓10经过清洁辊50之后,被充电辊20重新充电,在感光鼓10表面形成新的电子潜像,然后进入显影区域,被显影辊30进行显影,从而进入新一轮成像循环。
图3显示了清洁辊50的结构以及其对感光鼓10的清洁工作原理。清洁辊50包括一个轴芯51和轴芯外的套筒52,轴芯51相对处理盒盒体固定不动,套筒52表面光滑,以轴芯51为轴并相对轴芯51旋转。从轴向看,轴芯51内靠近感光鼓10的一侧设置有磁性力发生装置512,磁性力发生装置512为永磁铁。在其他实施例中,磁性力发生装置也可以是电磁铁。磁性力发生装置512在清洁辊50的轴线方向上延伸,在靠近套筒52的一侧具有相同的极性,该极性可以是S极也可以是N极。磁性力发生装置512的设置应满足以下要求:1.其在套筒52表面与感光鼓10表面之间能形成清洁区域,清洁区域的磁性力足以克服感光鼓10对残留碳粉12的吸引力,并使残留碳粉12吸附在套筒52表面;2.清洁区域在套筒52的轴线方向上的长度应当等于或大于感光鼓10表面形成电子潜像区域的长度;3.其产生的磁性力应能覆盖第一密封件70在清洁辊50表面上的接触部a,并且此处的磁性力应大于第一密封件70在此处的摩擦力;4. 其产生的磁性力不覆盖第二密封件80在清洁辊50表面上的接触部b。换句话说,由于磁性力发生装置512的如上设置,套筒52表面在周向上就形成了磁性面和非磁性面二个区域,其磁性面在套筒52表面和感光鼓10表面之间能形成清洁区域,清洁区域在轴向的长度应当等于或大于感光鼓10表面形成电子潜像区域的长度;并且接触部a处于磁性面的范围内,而接触部b处于非磁性面的范围内。这样设置的好处在于:在完成对感光鼓10的清洁作业后,随着套筒52的旋转,残余碳粉12首先经过第一密封件70,由于该处为磁性面,其磁性力大于第一封密封件70接触清洁辊50表面而形成的摩擦力,该磁性力能将残留碳粉12紧紧吸附在清洁辊50表面而使其不会被第一密封件70刮除,从而使残留碳粉12被顺利输送到废粉仓61中;而在接触部b,由于此处为非磁性面,没有磁性力,残留碳粉12很容易被第二密封件刮落到废粉仓61中,从而防止残留碳粉12外泄。在第一密封件70和第二密封件80之间的非磁性面上,部分残留碳粉12会因为没有磁性力的吸引而自然掉落到废粉仓中。当然,在其他实施例中,也可以在废粉仓61中设置额外的清洁装置,例如刮片、毛刷等,将非磁性面的残留碳粉刮落到废粉仓61中。
本实施例中,第一密封件70在套筒52的轴向上延伸,长度大于或等于套筒52的磁性面长度,材料最好是薄的、有较好弹性的塑料刮片,这样能保证较好的密封性的同时,也不会对套筒52表面产生过大的压力;第二密封件80也在套筒52的轴向上延伸,长度大于或等于套筒52的非磁性面长度,材料最好是毛毡或海绵,这样,它能与套筒52表面紧密接触,从而有效刮除套筒52表面吸附的残留碳粉12,而且以毛毡或海绵作为材料,也能使成本低廉。
图4和图5反映了清洁辊50的具体结构,清洁辊50包括轴芯51和套筒52,轴芯51两端部设置有突起54,其具有弓形或半月形的凹槽,用于固定轴芯51防止其旋转;套筒52一端设置有齿轮53,其与感光鼓10一端的齿轮12相啮合,并在齿轮12的驱动下旋转,从而带动套筒52的旋转。套筒52可以由绝缘材料制成,这样可以减少或防止在与第一密封件和第二密封件的摩擦过程中产生的静电,从而提高清洁效率。
以上是对本发明的实施例以及围绕实施例的相关结构变换进行的说明。但本实用新型并不局限于上述技术方案,例如,磁性力发生装置的数量可以变化,而且其位置和排列方法也可以变化,另外,套筒的厚度可以根据需要的磁性力大小进行调整等等。此等改变以及等效变换均应包含在权利要求所述的范围之内。
本发明采用提供的感光鼓清洁装置结构简单,便于加工和安装,清洁效果大大提高。

Claims (10)

  1. 处理盒,包括
    感光鼓;
    废粉仓,用于容纳从所述感光鼓上清除下来的废粉,具有与所述感光鼓轴线平行的矩形的废粉仓开口;
    清洁辊,与所述感光鼓轴线平行相互保持间隙地设置在所述废粉仓开口处;
    所述清洁辊包括相对所述废粉仓固定的轴芯及一安装在所述轴芯上并可相对所述轴芯旋转的套筒;
    所述轴芯在轴向横截面上设有面向所述感光鼓的磁性力发生装置,使所述套筒面向所述感光鼓的部分表面形成磁性面,并产生将所述感光鼓表面附着的废粉吸附到所述磁性面的磁性力;
    其特征在于:
    所述套筒与所述废粉仓开口两个长边之间的间隙处,分别设置有与所述套筒表面弹性接触的第一密封件和第二密封件;
    所述套筒还包括无磁性面,所述第二密封件与所述无磁性面弹性接触,所述第一密封件与所述磁性面弹性接触;
    所述套筒与所述第一密封件接触的部分的旋转方向为从所述废粉仓外向所述废粉仓内。
  2. 根据权利要求1所述的处理盒,其特征在于:
    所述磁性面与所述第一密封件的接触处的所述磁性力大于所述第一密封件对所述磁性面的摩擦力。
  3. 根据权利要求1或2所述的处理盒,其特征在于:
    所述磁性力发生装置为永磁铁。
  4. 根据权利要求1或2所述的处理盒,其特征在于:
    所述磁性面的长度在所述套筒的轴向上等于或大于所述感光鼓电子潜像形成区域的长度。
  5. 根据权利要求1或2所述的处理盒,其特征在于:
    所述套筒由绝缘材料制成。
  6. 根据权利要求1或2所述的处理盒,其特征在于:
    所述第二密封件为海绵或毛毡。
  7. 根据权利要求3所述的处理盒,其特征在于:
    所述磁性面的长度在所述套筒的轴向上等于或大于所述感光鼓电子潜像形成区域的长度。
  8. 根据权利要求3所述的处理盒,其特征在于:
    所述套筒由绝缘材料制成。
  9. 根据权利要求3所述的处理盒,其特征在于:
    所述第二密封件为海绵或毛毡。
  10. 根据权利要求4所述的处理盒,其特征在于:
    所述套筒由绝缘材料制成。
PCT/CN2012/079360 2011-08-30 2012-07-30 处理盒 WO2013029450A1 (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107589653A (zh) * 2017-10-28 2018-01-16 广州欣彩电脑耗材有限公司 一种新型打印机及其无废粉仓硒鼓

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102289182B (zh) * 2011-08-30 2012-12-26 珠海天威飞马打印耗材有限公司 处理盒
CN110069000A (zh) * 2019-04-25 2019-07-30 珠海毅希科技有限公司 一种防漏粉硒鼓

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4436412A (en) * 1981-05-20 1984-03-13 Mita Industrial Company Limited Cleaning device for use on an electrostatic copying apparatus
JP2005091548A (ja) * 2003-09-16 2005-04-07 Ricoh Co Ltd クリーニング装置、プロセスカートリッジ及び画像形成装置
CN1637654A (zh) * 2003-12-22 2005-07-13 佳能株式会社 图像形成装置
CN102289182A (zh) * 2011-08-30 2011-12-21 珠海天威飞马打印耗材有限公司 处理盒

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5730868A (en) * 1980-07-31 1982-02-19 Fuji Xerox Co Ltd Cleaning and demagnetizing device in magnetography
JPS5762079A (en) * 1980-10-02 1982-04-14 Toshiba Corp Cleaning device of picture forming device
DD157737B1 (de) * 1981-03-27 1986-07-16 Secura Werke Mikroelektronik Vorrichtung zur reinigung eines elektrischen ladungsbildtraegers in kopiergeraeten
JPS58132774A (ja) * 1982-02-03 1983-08-08 Toshiba Corp 電子写真クリ−ニング装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4436412A (en) * 1981-05-20 1984-03-13 Mita Industrial Company Limited Cleaning device for use on an electrostatic copying apparatus
JP2005091548A (ja) * 2003-09-16 2005-04-07 Ricoh Co Ltd クリーニング装置、プロセスカートリッジ及び画像形成装置
CN1637654A (zh) * 2003-12-22 2005-07-13 佳能株式会社 图像形成装置
CN102289182A (zh) * 2011-08-30 2011-12-21 珠海天威飞马打印耗材有限公司 处理盒

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107589653A (zh) * 2017-10-28 2018-01-16 广州欣彩电脑耗材有限公司 一种新型打印机及其无废粉仓硒鼓

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