WO2012113300A1 - 处理盒 - Google Patents

处理盒 Download PDF

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Publication number
WO2012113300A1
WO2012113300A1 PCT/CN2012/071150 CN2012071150W WO2012113300A1 WO 2012113300 A1 WO2012113300 A1 WO 2012113300A1 CN 2012071150 W CN2012071150 W CN 2012071150W WO 2012113300 A1 WO2012113300 A1 WO 2012113300A1
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WO
WIPO (PCT)
Prior art keywords
developing roller
powder
toner
axial
developing
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PCT/CN2012/071150
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English (en)
French (fr)
Inventor
吴鸣
周宏辉
Original Assignee
珠海天威飞马打印耗材有限公司
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Application filed by 珠海天威飞马打印耗材有限公司 filed Critical 珠海天威飞马打印耗材有限公司
Publication of WO2012113300A1 publication Critical patent/WO2012113300A1/zh

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/18—Mechanical 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
    • G03G21/1803—Arrangements or disposition of the complete process cartridge or parts thereof
    • G03G21/1814—Details of parts of process cartridge, e.g. for charging, transfer, cleaning, developing

Definitions

  • the invention relates to a processing box used in combination with a laser printer, and is particularly suitable for a processing box of a laser printer capable of realizing small-format paper printing.
  • the present invention is based on a Chinese patent application filed on Feb. 25, 2011, filed on Jan. 25, 2011, the content of which is hereby incorporated by reference.
  • the process cartridge is the most important consumable component, and the process cartridge applies carbon powder to the electrostatic latent image formed on the photosensitive drum for development, and the toner consumed by the development is processed by the powder silo in the processing cartridge.
  • the process cartridge is composed of a drum assembly and a developing assembly.
  • the drum assembly includes at least a photosensitive drum, usually a charging roller and a cleaning blade.
  • the developing assembly includes at least a powder magazine and a developing roller, and further includes a powder feeding roller and a powder discharging knife.
  • the structure of the process box is divided into two types: one-piece type and split type: the integrated process box, the drum assembly and the developing unit are not separable; the split type process box, the drum unit and the developing unit are detachably assembled and can be replaced separately. .
  • Figures 1 and 2 show the construction of a split cartridge development assembly.
  • the frame 1 of the developing assembly (the cover of the frame is omitted in the figure) has a powder bin 2 for storing toner, and the side wall of the powder bin 2 is provided with a shaft hole 21 for mounting the stirring frame, and the stirring frame is not shown in the drawing.
  • a powder feed roller 3 is attached to the side of the powder container 2, and when the agitator is stirred in the powder container 2, the toner falls onto the powder feed roller 3.
  • a rotatable developing roller 4 is disposed side by side with the powder feeding roller 3, and when toner is adhered to the powder feeding roller 3, the toner on the powder feeding roller 3 is conveyed to the developing roller 4.
  • the frame 1 is mounted with a knife holder 5, and the powder discharging knife 6 is mounted on the tool holder 5, and the knife edge portion of the powder discharging knife 6 is pressed against the developing roller 4, and the powder discharging knife is used for scraping off excess toner on the developing roller. Make the toner thickness uniform.
  • the drum assembly of the process cartridge is attached to the outside of the developing roller 4, and includes a photosensitive drum adjacent to the developing roller 4, a charging roller for negatively charging the photosensitive drum, and a residual charging roller for scraping off the photosensitive drum. Toner cleaner for toner.
  • the laser irradiates the surface of the photosensitive drum with laser light with image information, and forms a latent image in the area where the surface of the photosensitive drum is irradiated, that is, the electric charge in the exposed area disappears, is electrically neutral, and the non-exposed area is negatively charged.
  • the developing roller 4 is supplied with power through a conductive sheet connected between the laser printer power supply mechanism and the blade holder 5, so that the toner on the developing roller 4 is negatively charged. According to the principle of electric charge in the electric field, the toner on the developing roller 4 will move to the exposed area on the photosensitive drum under the electric field force, and the non-exposed area has no toner, which is the developing process. Then, the paper as the printing medium passes under the photosensitive drum, the toner is transferred onto the paper, and finally, the toner is heated and fixed, and then printed on the paper.
  • the processing box for laser printers on the market is mainly suitable for A4 (or A3) format printing, and the corresponding laser printer and the processing box installed in the laser printer are designed according to the A4 (or A3) format requirements, including the box body.
  • the general A4 format printable width is about 210mm, according to the principle of laser printing, the width of the developing roller in the axial direction, the photosensitive drum
  • the printable area in the axial direction is also at least 210 mm, and the A5 format only needs to print about 148 mm, which makes the area at both ends of the developing roller (ie, the area beyond 148 mm) always participate in development, but the toner is not transferred to On the drum, when A5 paper is printed for a long time, the toner will accumulate in the area at both ends of the developing roller, or even be dispersed, or transferred to the non-printing area, which will affect the printing effect.
  • the processing box for A5 or smaller format can also be completely redesigned, and the structure of the toner cartridge can be completely modified, such as using a shorter length of photosensitive drum, developing roller, charging roller, powder feeding roller, etc., however, All parts of this solution require a complete redesign and re-development of the mold at a very high cost.
  • Another object of the present invention is to provide a toner cartridge that can print a web of paper on a large format laser printer.
  • the present invention provides a process cartridge comprising a powder silo, a powder outlet is provided on the powder silo; a developing roller, the developing roller is rotatably mounted on the powder discharging port; a powder discharging knife, and a powder discharging knife controlling the developing roller
  • the thickness of the toner layer on the surface; the photosensitive drum, the developing roller conveys the toner to the photosensitive drum; the axial blocking structure of the developing zone, and the axial partitioning structure of the developing zone has a toner partition width in the axial direction of the developing roller, in the toner partition width
  • the axial blocking structure of the developing zone blocks the passage of the toner from the powder outlet to the photosensitive drum.
  • the developing zone axial partitioning structure comprises two facets respectively covering the axial end portions of the developing roller facing the powder discharging port side of the powder bin, and the face bodies respectively pass through a groove provided on the frame of the process cartridge
  • the hole insertion is installed in the frame of the process cartridge, and the outer seal fixing portion connected to the face body is sealingly mounted on the outer port of the slot.
  • the two dough bodies can block the toner conveyed from the powder outlet to the both ends of the developing roller shaft, so that no toner is involved in the development at both ends of the developing roller shaft, and the printable width is only the middle of the developing roller shaft.
  • the width of the toner is conveyed at one end, and the print width is reduced.
  • the face body of the solution is fixed on the process box by inserting, and when the face body is not inserted and installed in the process box, the process box is suitable for large-format paper printing, and the process box is suitable for small size after the face body is inserted into the process box. Paper printing.
  • the external seal fixing portion is used to prevent toner from leaking out of the slot.
  • the dough is a PET film sheet; the outer sealing portion is a plastic plate with a glue on one side.
  • the structure is simple in design and reliable in use.
  • the developing area axial partitioning structure comprises two retractable surface bodies respectively blocking the axial ends of the developing roller on the side of the developing roller facing the powder discharging port of the powder bin, and the retractable surface body can be developed along the same
  • the roller axially expands and contracts, one end of the retractable surface body near the shaft end is a fixed end, the end of the retractable surface body away from the shaft end is a movable end, the movable end is provided with a toggle handle, and the movable handle is limited to one on the processing box frame In the groove provided along the axial direction of the developing roller.
  • the toner which is conveyed from the powder outlet to a portion of the surface of the developing roller can be cut off to reduce the printable width. Since the telescopic body can be stretched and folded, in the printing process, according to the printing needs, the width of the telescopic body can be adjusted by the movable handle to realize printing of a variety of webs.
  • the retractable dough is a plastic film that is foldable and expandable in the axial direction of the developing roller.
  • the plastic film is low in cost and easy to manufacture, and can be made into a plastic film satisfying a certain hardness and toughness according to the performance requirements of the internal parts of the process box, so that the plastic film can be flexibly stretched and easily controlled.
  • the cutting edge at the end portions in the longitudinal direction of the powder discharging blade is tangent to the surface of the developing roller;
  • the cutting edge at the intermediate portion in the longitudinal direction of the powder discharging blade is a curved curved edge, and the curved curved portion The edge is lifted up for a position beyond the tangent point.
  • the powder discharging knife in the present embodiment will scrape off the toner on the two ends of the axial end of the developing roller, and the middle portion of the developing roller will have a certain thickness of carbon powder in the axial direction, so that only the developing roller has a middle portion of the axial direction.
  • the printable width is reduced, enabling printing on small sheets of paper.
  • the peripheral wall of the developing roller is convexly arranged in the axial direction, and the middle portion of the developing roller conveys toner toward the photosensitive drum, and the two ends of the axial end of the developing roller do not convey toner to the photosensitive drum.
  • the middle portion of the developing roller in the axial direction is a convex portion, the distance from the photosensitive drum is relatively close, so that the toner on the developing roller is conveyed onto the photosensitive drum; and both ends of the axial ends of the developing roller are concave portions, which are combined with the photosensitive drum Farther away, the toner on the developing roller cannot be transferred to the photosensitive drum, so that the width of the middle portion of the developing roller in the axial direction is the printable width, enabling printing of small-format paper.
  • a further solution is that the two sections of the axial end of the developing roller are covered with a protective cover.
  • the concave surface at both ends of the axial end of the developing roller is wrapped by a protective cover which does not have the performance of conveying toner, so that the concave portion is not contaminated with toner, no toner is accumulated, and does not participate in any development.
  • the developing portion axial partitioning structure includes a working section in the axial direction of the developing roller, and the outer surface is coated with a coating made of a printable material, and the outer surface of the axial end of the developing roller is covered with two surfaces.
  • the coating on the outer surface of the developing roller has a function of transporting toner to the photosensitive drum. If the coating material cannot convey the toner, printing cannot be achieved, and the surface of the coating which cannot convey the toner does not have the problem of toner accumulation.
  • the coating of the printing material is a coating of the semiconductor material capable of adsorbing the carbon powder, and the coating of the printing material is not a coating of the non-semiconductor material which is not adsorbable.
  • the axial partitioning structure of the developing area blocks the passage of the toner from the powder outlet to the photosensitive drum, the portion where the carbon powder is cut off is the unprintable area, and the portion where the carbon powder is not blocked is the normal printing area, thereby
  • the print width can be adjusted without the need to redesign the process cartridge and all parts of the printer, and no toner is deposited in the non-printing area.
  • Figure 1 is a perspective view of a conventional process cartridge developing assembly
  • Figure 2 is a perspective view of the developing unit of Figure 1 from another perspective;
  • Figure 3 is a schematic structural view of a developing assembly of the first embodiment of the process cartridge of the present invention.
  • Figure 4 is a schematic view showing the axial partition structure of the developing zone between the powder feeding roller and the developing roller in the developing unit of the first embodiment
  • Figure 5 is a schematic structural view of the axial blocking structure of the developing zone of the first embodiment
  • FIG. 6 is a schematic structural view of a developing assembly of Embodiment 2;
  • Figure 7 is a view showing the axial partition structure of the developing zone of the second embodiment
  • Figure 8 is a schematic view showing the structure of the powder discharging knife and the tool holder of the third embodiment
  • Figure 9 is a schematic view showing the structure of the powder discharging knife, the tool holder and the developing roller of the third embodiment
  • Figure 10 is a partial enlarged view of A in Figure 9;
  • Figure 11 is a schematic view showing the structure of a developing roller of the fourth embodiment.
  • Figure 12 is a schematic structural view of a developing roller of Embodiment 5.
  • the process cartridge of the present invention is composed of a drum assembly including a photosensitive drum, and the developing assembly includes a developing roller which is disposed in parallel with the developing roller in the axial direction. Since the improvement of the present invention is only in the developing assembly portion of the process cartridge, the drawings of the embodiments of the present invention are omitted from the drawings for the sake of clarity of explanation, and the description of the assembly relationship between the drum assembly and the developing assembly is omitted. The improved portion of the developing assembly will be described in detail.
  • the developing assembly of the process cartridge of this embodiment On the frame 1 of the developing assembly, there is a powder bin 2 for storing toner, and the powder bin 2 has a shaft hole 21 for rotatably mounting the stirring frame.
  • the mixing frame is not shown in the drawing, and the powder bin 2 side is A powder feed roller 3 is rotatably mounted. When the agitator rotates, the toner in the powder compartment 2 is dropped onto the powder feed roller 3.
  • the developing roller 4 disposed in parallel with the powder feeding roller 3 is rotatably mounted on the frame 1, and when toner is present on the powder feeding roller 3, the toner on the powder feeding roller 3 is conveyed to the developing roller 4.
  • a frame 5 is provided on the frame 1, and the upper end of the powder discharging blade 6 is fixed to the blade holder 5, and the blade at the lower end of the powder discharging blade 6 is pressed against the upper surface of the developing roller 4.
  • the powder discharging knife 6 is for controlling the adsorption of the toner on the surface of the developing roller to make the thickness of the carbon powder layer uniform.
  • each of the developing zone axial partition structures 7 has a rectangular PET film 71, and a sealing plug 72 fixedly connected to the rectangular PET film 71.
  • Two rectangular PET films are respectively inserted from the two slits 11 and interposed between the powder feeding roller and the developing roller, and block the conveyance of the toner at both axial end portions of the powder feeding roller and both axial ends of the developing roller.
  • One side 721 of the sealing plug 72 is provided with an adhesive, and the side surface 721 of the sealing plug is attached to the outer surface of the bottom of the frame, and the slot 11 is sealed by the sealing plug to prevent powder leakage.
  • the toner transfer between the axial end portions of the powder feeding roller 3 and the axial end portions of the developing roller 4 is blocked, and there is no carbon in the width of the partition.
  • the powder forms an unprintable area, thereby reducing the printable width.
  • the length value of the rectangular PET film 71 in the axial direction of the developing roller can be appropriately selected to realize printing of A5 or smaller paper.
  • the developing assembly of the process cartridge of the present embodiment has a powder bin 2 for storing toner on the frame 1, and a powder hole 2 for rotatably mounting the stirring frame in the powder bin 2, which is not shown in the drawing.
  • the mixing rack is detached, and the powder feeding roller 3 is rotatably attached to the powder compartment 2 side.
  • the agitator rotates, the toner in the powder compartment 2 is sent to the powder feed roller 3.
  • the developing roller 4, which is in close proximity to the powder feeding roller 3, is rotatably mounted on the frame 1, and when toner is present on the powder feeding roller 3, the toner on the powder feeding roller 3 is conveyed to the developing roller 4.
  • the frame 1 has a blade holder 5, and the upper end of the powder discharging blade 6 is fixed to the blade holder 5, and the blade edge of the lower end of the powder discharging blade 6 is pressed against the surface of the developing roller 4.
  • the powder discharging knife 6 is for controlling the toner adsorbed on the surface of the developing roller so that the thickness of the carbon powder layer is made uniform.
  • each of the developing zone axial partitioning structures 8 has a rectangular plastic film 81, and the outer side of the rectangular plastic film 81 is fixed to the frame 1 at the axial ends of the developing roller 4, and the inner side of the rectangular plastic film 81 is sent.
  • each rectangular plastic film 81 is adjusted in the axial direction by the straight strip handle 82, and the plastic film is unfolded or gathered in the axial direction.
  • the upper and lower ends of a straight strip handle 82 of each rectangular plastic film 81 protrude from the outside of the frame 1 from the corresponding two slots 11 at the top and bottom of the frame 1.
  • the different states of use of the two plastic films 81 are shown in one figure.
  • the plastic film 81 on the left side is in an unfolded state, and the toner transfer at the left end between the powder feed roller 3 and the developing roller 4 is interrupted, and the plastic film 81 on the right side is in a folded state, between the powder feed roller 3 and the developing roller 4.
  • the toner transfer at the right end is not blocked.
  • the plastic film 81 of this embodiment has a certain toughness and hardness, and is easy to stretch and gather.
  • the two plastic films 81 are gathered by the movement of the straight strip handle in the slot, so that the axial length of the developing roller is large, so as to realize large-format printing; the straight strip handle is in the slot.
  • the straight strip handle can be fixed by attaching a sealing film strip, and the slot is sealed to prevent powder leakage.
  • the sealing film strip can be a PET film with a glue on one side.
  • the improvement of the process cartridge of this embodiment is the powder discharging knife 6.
  • the axial partition structure of the developing zone is the structure of the blade 6 of the powder discharging knife.
  • the blade of the powder discharging knife 6 is close to the short protruding portion 62 of the axial end of the developing roller which is tangential to the surface of the developing roller, and the middle portion of the blade of the powder discharging knife 6 is connected with a raised tail at the cutting point. Long extension 61.
  • the powder discharging blade 6 scrapes off the toner on the surface of the developing roller 4, so that the toner on the developing roller 4 corresponding to the short protruding section 62 is used.
  • the blade of the powder discharging blade 6 has a tail portion exceeding the cutting point position and contacts the surface of the developing roller 4, the contact area of the blade with the toner on the developing roller 4 is large, and the carbon powder is not easily scraped off, which may be caused by the blade edge.
  • the tail portion is slightly held up by a certain thickness of toner so that the blade of the powder discharging blade 6 is offset from the surface of the developing roller 4, so that toner remains on the surface of the developing roller 4 corresponding to the long projecting portion 61.
  • the carbon powder at both ends of the developing roller 4 is scraped off, and the toner in the intermediate portion of the developing roller 4 is uniformly distributed, so that only in the width range of the intermediate portion of the developing roller 4, the developing roller 4 and the photosensitive drum to achieve electrostatic development.
  • the area corresponding to the width of the short protruding edge 62 of the powder discharging blade is an unprintable area, which reduces the printing width and realizes printing of small-sized paper.
  • the improvement of the process cartridge of this embodiment is the developing roller 4.
  • the developing portion axial partitioning structure is a convex stepped structure of the developing roller 4.
  • the peripheral wall of the developing roller 4 has a convex step shape, and the middle peripheral wall is a convex portion 42, and the two peripheral walls adjacent to the both ends are concave portions 41.
  • the developing roller 4 adopts such a convex-like structure, and during the action of the developing roller 4 with the photosensitive drum, since the concave portion 41 is far away from the photosensitive drum, only the toner of the peripheral wall of the convex portion 42 corresponds to the process of conveying the toner.
  • the toner is conveyed to the surface of the photosensitive drum, and the toner of the peripheral wall of the developing roller recess 41 cannot be conveyed to the surface of the photosensitive drum, so that the width of the electrostatically developed region is the width of the peripheral wall of the developing portion 52 of the developing roller, which reduces the printing width, thereby achieving a small width.
  • Printing of paper is conveyed to the surface of the photosensitive drum, and the toner of the peripheral wall of the developing roller recess 41 cannot be conveyed to the surface of the photosensitive drum, so that the width of the electrostatically developed region is the width of the peripheral wall of the developing portion 52 of the developing roller, which reduces the printing width, thereby achieving a small width. Printing of paper.
  • the recessed portion 41 of the developing roller 4 described above and the surface of the protective cover does not have the function of adsorbing carbon powder, and may be made of an insulating material body.
  • the improvement of the process cartridge of this embodiment is the developing roller 4'.
  • the development area axial partition structure is the structure of the developing roller 4'.
  • the structure of the developing roller generally includes an inner core, a conductive sponge rubber material, and a coating containing a semiconductor material coated on the outermost layer.
  • the iron core is used to conduct electric current
  • the conductive sponge rubber layer is used for transporting electric charges
  • the coating layer of the semiconductor material has a thickness of about 2 to 10 ⁇ m, which has a function of transporting carbon powder, and carries the carbon powder onto the photosensitive drum to participate in development.
  • the developing roller 4' of the present embodiment is a coating coated on the peripheral wall of the axial intermediate portion 42' as a coating for transporting the semiconductor material of the carbon powder, and is coated on the peripheral wall of the both end portions 41'.
  • a coating of carbon powder such as a coating of a non-semiconductor material.
  • the above embodiments mainly provide a structure for blocking the transmission of the toner layer in the passage of the processing cartridge from the powder outlet to the photosensitive drum, so that the width of the printing web can be adjusted, so that the processing cartridge can be loaded.
  • Print small-format paper into a laser printer and print well.
  • the process cartridges in the first embodiment and the second embodiment may omit the powder feeding roller, and may also set the axial blocking structure of the developing zone on the developing roller and the output roller. These changes can also achieve the object of the invention between the powder ports or on the powder outlet.
  • the present invention is not limited to the above embodiment, for example, the axial blocking structure of the developing zone is not disposed to be distributed at the axial end positions of the developing roller, and may be concentrated on one side of the developing roller axial direction, and the corresponding laser of the laser printer
  • the scanning area is adapted for adaptation, and such changes are also intended to be included within the scope of the claims of the present invention.
  • the invention not only changes the overall structural size of the process cartridge, but also improves some of the components, and effectively and reasonably changes the large-format printing structure into a small-format printing structure, thereby avoiding the quality of the small-format printing in the prior art. defect.
  • the invention has reasonable design, convenient use, cost saving and good printing effect.

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  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)
  • Cleaning In Electrography (AREA)
  • Electrophotography Configuration And Component (AREA)

Description

处理盒 技术领域
本发明涉及一种与激光打印机配套使用的处理盒，尤其适用于可实现小幅面纸张打印的激光打印机的处理盒。本发明基于申请日为2011年02月25日、申请号为201110046531.0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。
 背景技术
在激光打印机的成像装置中，处理盒是最重要的消耗部件，处理盒将碳粉敷设于形成在感光鼓上的静电潜像上进行显影，显影所消耗的碳粉由处理盒内的粉仓提供。处理盒由鼓组件和显影组件组成。鼓组件至少包括感光鼓，通常还有充电辊以及清洁刮刀。显影组件至少包括粉仓和显影辊，还包括送粉辊以及出粉刀。处理盒的结构分为一体式和分体式两种：一体式的处理盒，鼓组件和显影组件不可拆分；分体式的处理盒，鼓组件和显影组件可拆卸地装配在一起，可分别更换。
图1、2示出了一种分体式处理盒显影组件的结构。显影组件的框架1（图中略去框架的盖体）中有一个用于存储碳粉的粉仓2，粉仓2侧壁设有用于安装搅拌架的轴孔21，图中未示出搅拌架。在粉仓2一侧安装有一个送粉辊3，当搅拌架在粉仓2内进行搅拌时，碳粉落到送粉辊3上。与送粉辊3并排设置有可旋转的显影辊4，当送粉辊3上粘有碳粉时，送粉辊3上的碳粉被传送到显影辊4上。框架1上安装有刀架5，出粉刀6安装在刀架5上且出粉刀6的刀口部抵压在显影辊4上，出粉刀用于刮去显影辊上多余的碳粉，使碳粉厚度均匀。
该处理盒的鼓组件连接在显影辊4的外侧，包括与显影辊4靠近的感光鼓，用于给感光鼓充负电的充电辊，以及用于刮去转印完成后残留在感光鼓上的碳粉的清洁刮刀。
在打印机打印过程中，激光器向感光鼓表面照射带有图像信息的激光，在感光鼓表面被照射的区域形成潜影，即曝光区域电荷消失，呈电中性，非曝光区域带负电。另外，激光打印机工作过程中,通过连接在激光打印机供电机构和刀架5之间的导电片对显影辊4进行供电，使得显影辊4上的碳粉带负电。根据电荷在电场中的原理，显影辊4上的碳粉将在电场力作用下移动到感光鼓上曝光区域，而非曝光区域无碳粉，此即为显影过程。然后，作为打印介质的纸张从感光鼓下方经过，碳粉将转印到纸张上，最后，碳粉经过加热定影后在纸张上，完成打印。
目前，市面上激光打印机用处理盒主要适用于A4（或A3）幅面的打印，相应的激光打印机以及激光打印机内安装的处理盒的尺寸结构按照满足A4（或A3）幅面要求设计，包括盒体长度、显影辊长度、感光鼓轴向上的曝光尺寸，以及激光头与之对应的扫描宽度等。
 技术问题
随着各种使用需求的增加，A5或者更小幅面的打印纸张越来越多。直接用A4（或A3）幅面的处理盒来打印小幅面的纸张，容易出现一些打印缺陷：一般A4幅面可打印宽度为210mm左右，根据激光打印原理，显影辊在轴向上的宽度、感光鼓在轴向上的可打印区域也至少要达到210mm，而A5幅面只需要打印148mm左右，这使得显影辊两端的区域（即超过148mm外的区域）始终参与显影，但是碳粉不会被传送到感光鼓上，长期打印A5纸张时，碳粉必会在显影辊两端的区域形成堆积，甚至飘散出来，或者转印到非打印区域，影响打印效果。另一方面，A5或者更小幅面专用的处理盒也可以全部重新设计，将粉盒的结构全部做修改，如用较短长度的感光鼓、显影辊、充电辊、送粉辊等，但是，此方案所有零件需要全面重新设计，重新开发模具，成本非常高。
技术解决方案
本发明的另一目的是提供一种在大幅面激光打印机上可调打印幅面纸张的碳粉盒。
为实现上述的目的，本发明提供的处理盒，包括粉仓，粉仓上设有出粉口；显影辊，显影辊可旋转地安装在出粉口；出粉刀，出粉刀控制显影辊表面的碳粉层厚度；感光鼓，显影辊向感光鼓传送碳粉；显影区轴向隔断结构，显影区轴向隔断结构在显影辊的轴向上具有碳粉隔断宽度，在碳粉隔断宽度内，显影区轴向隔断结构隔断碳粉自出粉口到达感光鼓的通道。
一个优选的方案是，显影区轴向隔断结构包括分别遮挡在显影辊面对粉仓出粉口一侧的轴向两端部位的两个面体，面体分别通过一个设置在处理盒框架上的槽孔***安装在处理盒框架内，与面体相连的外部密封固定部密封安装在槽孔的外端口上。
采用以上技术方案，两个面体可隔断自出粉口传送到显影辊轴两端部的碳粉，于是，在显影辊轴两端部没有碳粉参与显影，可打印的宽度只是显影辊轴中间一端被传送碳粉的宽度，打印幅面减小。根据设计面体隔断的宽度，可得到需要打印的幅面要求。另外，此方案的面体通过***方式固定在处理盒上，当面体没有***安装在处理盒内时，处理盒适用于大幅面纸张打印，当面体***安装到处理盒内后，处理盒适用于小幅面纸张打印。采用的外部密封固定部防止碳粉从槽孔中漏出。
进一步的方案是，面体为PET薄膜片；外部密封固定部为一面带有粘胶的塑料板。使用时，结构设计简单，使用可靠。
另一个优选的方案是，显影区轴向隔断结构包括分别遮挡在显影辊面对粉仓出粉口一侧的显影辊轴向两端部位的两个可伸缩面体，可伸缩面体可沿所显影辊轴向伸缩，可伸缩面体靠近轴端头的一端为固定端，可伸缩面体远离轴端头的一端为活动端，活动端设有拨动手柄，活动手柄被限制在处理盒框架上的一个沿显影辊轴向设置的凹槽内。
由上述方案可见，采用的可伸缩面体展开时，能将自出粉口传送到显影辊表面的部分区域的碳粉隔断，减小可打印宽度。由于伸缩面体可伸展和收拢，所以在打印过程中，可根据打印需要，通过活动手柄调节伸缩面体所隔断的宽度，实现多种幅面纸张的打印。
进一步的方案是，可伸缩面体为在显影辊轴向上可折叠、可展开的塑料薄膜。塑料薄膜成本低、制作容易，可根据处理盒内部零部件性能要求，制作满足一定硬度和韧性的塑料薄膜，使得此塑料薄膜伸缩自如，易于控制。
又一个优选的方案是，位于出粉刀的长度方向的两端部位上的刀刃与显影辊表面相切；位于出粉刀的长度方向的中间部位上的刀刃为弧形弯边，弧形弯边为超出切点位置向上翘起一段。当刀刃与显影辊表面相切时，显影辊表面的碳粉很容易被出粉刀刮掉；而，当刀刃在超出切点位置带有一翘起的尾部时，出粉刀与碳粉之间的接触面积增大，刮力减小，会在显影辊表面留有碳粉。从而，本方案中的出粉刀将会刮掉显影辊轴向端部的两段上的碳粉，而显影辊轴向中段将会留有一定厚度的碳粉，使得只有显影辊轴向中段为可打印区域，减小了可打印宽度，可实现小幅面纸张的打印。
又一个优选的方案是，显影辊周壁在轴向上呈凸阶状，显影辊轴向中段向感光鼓传送碳粉，显影辊轴向端部的两段不向感光鼓传送碳粉。由于显影辊轴向中段为凸部，其与感光鼓距离较近，使得显影辊上的碳粉被传送到感光鼓上；而显影辊轴向两端部的两端为凹部，其与感光鼓距离较远，显影辊上的碳粉不可传送到感光鼓上，从而显影辊轴向中段的宽度为可打印宽度，实现了小幅面纸张的打印。
进一步的方案是，显影辊轴向端部的两段包覆防护套。采用不具有传送碳粉性能的防护套将显影辊轴向端部的两端的凹面包裹起来，使得凹面部分不会沾染碳粉，无碳粉堆积，不参与任何显影。
又一个优选的方案是，显影区轴向隔断结构包括显影辊轴向中间的工作段外表面包覆由可实现打印材料制成的涂层，显影辊轴向端部的两段外表面包覆由不可实现打印材料制成的涂层。显影辊外表面的涂层具有向感光鼓传送碳粉的作用，如果涂层材料不能传送碳粉，则不可实现打印，而且不能传送碳粉的涂层表面不会出现碳粉堆积的问题。
再一个优选的方案是，可实现打印材料的涂层为可吸附碳粉的半导体材料涂层，不可实现打印材料的涂层为不可吸附碳粉的非半导体材料涂层。
 有益效果
由上述方案可见，显影区轴向隔断结构隔断碳粉自出粉口到达感光鼓的通道，碳粉被隔断的部分为不可打印区域，碳粉没有被隔断的部分为正常打印区域，从而，在不需要对处理盒以及打印机的所有零件进行重新设计开发的情况下，可实现打印幅面宽度的调节，且非打印区域不会堆积碳粉。
 附图说明
图1是现有处理盒显影组件的立体图；
图2是图1示显影组件另一视角的立体图；
图3是本发明处理盒实施例一的显影组件的结构示意图；
图4是实施例一的显影组件内送粉辊和显影辊之间安装显影区轴向隔断结构的示意图；
图5是实施例一的显影区轴向隔断结构的结构示意图；
图6是实施例二的显影组件的结构示意图；
图7是实施例二的显影区轴向隔断结构的展示图；
图8是实施例三的出粉刀以及刀架的结构示意图；
图9是实施例三的出粉刀及刀架和显影辊的结构示意图；
图10是图9中的A局部放大图；
图11是实施例四的显影辊的结构示意图；
图12是实施例五的显影辊的结构示意图；
以下结合附图及各实施例对本发明作进一步说明。
 本发明的实施方式
本发明的处理盒由鼓组件与显影组件组成，鼓组件包括感光鼓，显影组件包括显影辊，感光鼓与显影辊在轴向平行布置。由于本发明的改进仅在于处理盒的显影组件部位，因此为说明问题清楚起见，本发明各实施例的附图略去鼓组件，也略去了对鼓组件与显影组件装配关系的说明，仅对显影组件的改进部分加以详细说明。
实施例一
如图3所示，本实施例处理盒的显影组件。在显影组件的框架1上有一个存储碳粉的粉仓2，粉仓2内有用于可旋转地安装搅拌架的轴孔21，在图中未示出搅拌架，在粉仓2一侧可旋转地安装有送粉辊3。当搅拌架旋转时，粉仓2中的碳粉被抛落在送粉辊3上。
与送粉辊3平行设置的显影辊4可旋转地安装在框架1上，当送粉辊3上有碳粉时，送粉辊3上的碳粉传送到显影辊4上。
在框架1上有刀架5，出粉刀6上端固定在刀架5上，出粉刀6下端的刀刃抵压在显影辊4的上表面。出粉刀6用于控制显影辊表面吸附碳粉，使碳粉层的厚度均匀。
如图3、4和5所示，在框架1的底部开设两个槽孔11，两个槽孔11的位置约对应于显影辊4轴向两端的位置，二个显影区轴向隔断结构7分别***安装在两个槽孔11内，固定在框架1上。每一个显影区轴向隔断结构7有一个矩形PET膜片71，与矩形PET膜片71固定连接的密封塞板72。两个矩形PET膜片分别从两个槽孔11***且插在送粉辊和显影辊之间，隔断送粉辊的轴向两端部与显影辊轴向两端部的碳粉的传送。密封塞板72的一侧面721设有粘胶，密封塞板的侧面721粘贴在框架底部外表面上，通过密封塞板将槽孔11密封，防止漏粉。
本实施例在使用了显影区轴向隔断结构7之后，隔断了送粉辊3轴向两端部和显影辊4轴向两端部之间的碳粉传送，隔断的宽度内不会有碳粉，形成不可打印区域，从而使得可打印的宽度减小。根据需要，适当选取矩形PET膜片71在显影辊轴向上的长度值，可实现A5或者更小幅面纸张的打印。
实施例二
如图6所示，本实施例处理盒的显影组件在框架1上有一个存储碳粉的粉仓2，粉仓2内有用于可旋转地安装搅拌架的轴孔21，在图中未示出搅拌架，在粉仓2一侧可旋转地安装有送粉辊3。当搅拌架旋转时，粉仓2中的碳粉被送到送粉辊3上。
与送粉辊3并行靠近的显影辊4可旋转地安装在框架1上，当送粉辊3上有碳粉时，送粉辊3上的碳粉传送到显影辊4上。
框架1上有刀架5，出粉刀6上端固定在刀架5上，出粉刀6下端的刀刃抵压在显影辊4的表面。出粉刀6用于控制显影辊表面吸附的碳粉，使使碳粉层的厚度均匀。
如图6、7所示，在框架1的顶部和底部分别开设两个槽孔11，每两个槽孔11的位置大致对应于显影辊4轴向的两端，二个显影区轴向隔断结构8分别***安装在顶部和底部的两个槽孔11内，并固定在框架1上。每个显影区轴向隔断结构8有一个矩形塑料薄膜81，矩形塑料薄膜81的外侧边固定在显影辊4轴向两端所在位置的框架1上，矩形塑料薄膜81的内侧边在送粉辊3和显影辊4之间，且矩形塑料薄膜81的内侧边通过直条状手柄82来调节在轴向上的位置，实现塑料薄膜沿轴向的展开或收拢。每一个矩形塑料薄膜81的一个直条状手柄82的上下两端分别自框架1的顶部和底部对应的两个槽孔11伸出框架1外。
如图7所示，为了清楚展示显影区轴向隔断结构8的使用原理，将两个塑料薄膜81不同的使用状态放入一幅图中进行说明。位于左侧的塑料薄膜81处于展开状态，隔断了送粉辊3和显影辊4之间左端的碳粉传送，位于右侧的塑料薄膜81处于收拢状态，送粉辊3和显影辊4之间右端的碳粉传送不受阻隔。本实施例的塑料薄膜81具有一定的韧性和硬度，便于伸展和收拢。
使用时，通过直条状手柄在槽孔内的移动，将两个塑料薄膜81均收拢，使显影辊轴向工作长度较大，以实现大幅面的打印；通过直条状手柄在槽孔内的移动，将两个塑料薄膜81在显影辊轴向上展开，从而使显影辊轴向工作长度相对缩短，减小了打印宽度，可实现小幅面的打印。
在框架1顶部和底部的槽孔11的外端口上，可通过粘贴密封膜条，将直条手柄固定，且密封槽孔以防止漏粉。密封膜条可为一侧设有粘胶的PET薄膜。
实施例三
如图8、9和10所示，本实施例处理盒的改进之处在于出粉刀6。显影区轴向隔断结构是出粉刀6刀刃处的结构。出粉刀6的刀刃靠近显影辊轴向两端的部位恰好与显影辊表面相切的短伸出段62，而出粉刀6的刀刃中间段均为在切点处衔接一翘起的尾部的长伸出段61。
当出粉刀6的刀刃恰好与显影辊4上表面相切时，出粉刀6刮除显影辊4表面的碳粉，所以，位于短伸出段62所对应的显影辊4上的碳粉被刮掉；当出粉刀6的刀刃带有超过切点位置的尾部在接触显影辊4表面时，刀刃与显影辊4上碳粉的接触面积较大，碳粉不易刮掉，会因为刀刃的尾部被一定厚度的碳粉稍微托起，使得出粉刀6刀刃偏离显影辊4表面，从而在长伸出段61所对应的显影辊4表面留有碳粉。
所以，在传送碳粉过程中，显影辊4两端部碳粉被刮掉，显影辊4中间部留有厚度均匀的碳粉，从而，只是在显影辊4中间部的宽度范围内，显影辊4与感光鼓实现静电显影功能。对应于出粉刀短伸出边62的宽度范围内的区域为不可打印区域，减小了打印宽度，实现了小幅面纸张的打印。
实施例四
如图11所示，本实施例处理盒的改进之处在于显影辊4。显影区轴向隔断结构是显影辊4的凸阶状结构。显影辊4周壁呈凸阶状，中间的一段周壁为凸部42，分别靠近两端的两段周壁为凹部41。显影辊4采用这种凸阶状结构，显影辊4在与感光鼓作用过程中，由于凹部41距离感光鼓距离较远，所以在传送碳粉过程中，只有凸部42周壁的碳粉相对应地传送到感光鼓表面，显影辊凹部41周壁的碳粉不能被传送到感光鼓表面，使得静电显影的区域的宽度为显影辊凸部42周壁的宽度，减小了打印宽度，从而实现了小幅面纸张的打印。
还可以在上述的显影辊4的凹部41包覆防护套，此种防护套表面不具有吸附碳粉的功能，可采用绝缘材料体制成。
实施例五
如图12所示，本实施例处理盒的改进之处在于显影辊4’。显影区轴向隔断结构是显影辊4’的结构。
公知显影辊的结构一般包括内层的铁芯，导电海绵橡胶物质和包覆在最外层的含半导体物质的涂层。铁芯用于传导电流，导电海绵橡胶层用于传输电荷，半导体物质的涂层的厚度约为2-10μm，其具有运送碳粉的功能，将碳粉运载到感光鼓上参与显影。
本实施例的显影辊4’是在轴向中间段42’的周壁上包覆的涂层为可运送碳粉的半导体物质的涂层，而在两端部41’的周壁上包覆不能运送碳粉的涂层，如采用非半导体物质的涂层。从而，显影辊与感光鼓的显影工作宽度为显影辊的中间段42’所对应的宽度，从而实现小幅面纸张的打印。
当然，也可以将显影辊4’导电橡胶海绵层的结构加以改进，使得只有中间段是可正常传输电荷的导电橡胶海绵物质，而在两端部为不可进行传输电荷的绝缘橡胶物质，这样，也可以实现小幅面纸张打印。
综上所述，以上各实施例主要是在处理盒的自出粉口到达感光鼓的通道内，设置可隔断部分碳粉传输的结构，来实现打印幅面的宽度调整，使得该处理盒可装入激光打印机中打印小幅面纸张，且打印效果好。当然，上述实施例实际应用时还可以有更多的变化，例如，实施例一和实施例二中的处理盒可以省略送粉辊，还可将显影区轴向隔断结构设置在显影辊与出粉口之间，或者设置在出粉口上，这些改变同样可以实现本发明的目的。
最后需要强调的是，本发明不限于上述实施方式，如显影区轴向隔断结构不是设置成分布在显影辊轴向两端位置，可集中在显影辊轴向的一侧，激光打印机相应的激光扫描区域进行适应性调整，这些变化也应该包括在本发明权利要求的保护范围内。
 工业实用性
本发明在不改变处理盒整体结构尺寸的情况下，只对部分零部件进行改进，将大幅面打印结构有效、合理地改变成可小幅面打印结构，避免了现有技术中小幅面打印出现的品质缺陷。本发明设计合理、使用方便，节省成本，打印效果好。

Claims (10)

  1. 处理盒，包括
    粉仓，所述粉仓上设有出粉口；
    显影辊，所述显影辊可旋转地安装在所述出粉口；
    出粉刀，所述出粉刀控制所述显影辊表面的碳粉层厚度；
    感光鼓，所述显影辊向所述感光鼓传送碳粉；
    其特征在于：
    显影区轴向隔断结构，所述显影区轴向隔断结构在所述显影辊的轴向上具有碳粉隔断宽度，在所述碳粉隔断宽度内，所述显影区轴向隔断结构隔断碳粉自所述出粉口到达所述感光鼓的通道。
  2. 根据权利要求1所述的处理盒，其特征在于：
    显影区轴向隔断结构包括
    分别遮挡在所述显影辊面对所述粉仓出粉口一侧的轴向两端部位的两个面体，所述面体分别通过一个设置在处理盒框架上的槽孔***安装在处理盒框架内，与所述面体相连的外部密封固定部密封安装在槽孔的外端口上。
  3. 根据权利要求2所述的处理盒，其特征在于：
    所述面体为PET薄膜片；
    所述外部密封固定部为一面带有粘胶的塑料板。
  4. 根据权利要求1所述的处理盒，其特征在于：
    显影区轴向隔断结构包括
    分别遮挡在所述显影辊面对所述粉仓出粉口一侧的显影辊轴向两端部位的两个可伸缩面体，所述可伸缩面体可沿所述显影辊轴向伸缩，所述可伸缩面体靠近轴端头的一端为固定端，所述可伸缩面体远离轴端头的一端为活动端，所述活动端设有拨动手柄，所述活动手柄被限制在处理盒框架的一个沿显影辊轴向设置的凹槽内。
  5. 根据权利要求4所述的处理盒，其特征在于：
    所述可伸缩面体为在所述显影辊轴向上可折叠、可展开的塑料薄膜。
  6. 根据权利要求1所述的处理盒，其特征在于：
    显影区轴向隔断结构包括
    位于所述出粉刀的长度方向的两端部位上的刀刃与所述显影辊表面相切；
    位于所述出粉刀的长度方向的中间部位上的刀刃为弧形弯边，所述弧形弯边为超出切点位置向上翘起一段。
  7. 根据权利要求1所述的处理盒，其特征在于：
    所述显影辊周壁在轴向上呈凸阶状，所述显影辊轴向中段向所述感光鼓传送碳粉，所述显影辊轴向端部的两段不向所述感光鼓传送碳粉。
  8. 根据权利要求7所述的处理盒，其特征在于：
    所述显影辊轴向端部的两段包覆防护套。
  9. 根据权利要求1所述的处理盒，其特征在于：
    显影区轴向隔断结构包括
    所述显影辊轴向中间的工作段外表面包覆由可实现打印材料制成的涂层，所述显影辊轴向端部的两段外表面包覆由不可实现打印材料制成的涂层。
  10. 根据权利要求9所述的处理盒，其特征在于：
    所述可实现打印材料的涂层为可吸附碳粉的半导体材料涂层，所述不可实现打印材料的涂层为不可吸附碳粉的非半导体材料涂层。
PCT/CN2012/071150 2011-02-25 2012-02-15 处理盒 WO2012113300A1 (zh)

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