WO2007048325A1 - Cartouche de developpement - Google Patents

Cartouche de developpement Download PDF

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Publication number
WO2007048325A1
WO2007048325A1 PCT/CN2006/002781 CN2006002781W WO2007048325A1 WO 2007048325 A1 WO2007048325 A1 WO 2007048325A1 CN 2006002781 W CN2006002781 W CN 2006002781W WO 2007048325 A1 WO2007048325 A1 WO 2007048325A1
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WO
WIPO (PCT)
Prior art keywords
developing
unit
developing unit
photoelectric conversion
roller
Prior art date
Application number
PCT/CN2006/002781
Other languages
English (en)
French (fr)
Inventor
Benyou Jin
Xiantang Song
Original Assignee
Print-Rite Technology Development Co., Ltd Of Zhuhai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Print-Rite Technology Development Co., Ltd Of Zhuhai filed Critical Print-Rite Technology Development Co., Ltd Of Zhuhai
Publication of WO2007048325A1 publication Critical patent/WO2007048325A1/zh

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Classifications

    • 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
    • G03G21/1817—Arrangements or disposition of the complete process cartridge or parts thereof having a submodular arrangement
    • G03G21/1821—Arrangements or disposition of the complete process cartridge or parts thereof having a submodular arrangement means for connecting the different parts of the process cartridge, e.g. attachment, positioning of parts with each other, pressure/distance regulation
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1651—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for connecting the different parts
    • G03G2221/1654—Locks and means for positioning or alignment
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/18—Cartridge systems
    • G03G2221/183—Process cartridge
    • G03G2221/1853—Process cartridge having a submodular arrangement

Definitions

  • the present invention relates to a developing cartridge for a laser printer, and particularly comprising a developing unit and a photoelectric conversion unit, having a detaching device separated from a laser scanning unit, a transfer unit where the transfer roller is located, and a fixing unit where the fixing roller is located, for separating
  • the electrostatic latent image generated by the photosensitive drum is converted into a developing cartridge which is recorded as a visible image by a developer such as toner.
  • Conventional image forming apparatuses include copiers, laser printers, facsimile machines, ribbon printers, and LED printers.
  • the toner is a toner which realizes the conversion of the light-to-one image.
  • a developing roller of the drum and powder integrated image forming apparatus is disposed around the photosensitive drum to form a toner image formed on the photosensitive drum.
  • the toner of the developing roller comes from the toner hopper.
  • the toner storage capacity of the toner hopper is limited by the volume of the hopper. Therefore, the toner in the powder hopper must be supplied by a dedicated developing cartridge after it has been used up.
  • the main functional blocks of the laser image forming apparatus include: a laser scanning unit, a photoelectric conversion unit, a charging unit, a developing unit, a transfer unit, and a fixing unit.
  • the main components of the laser scanning unit are the laser generator and the light reflection transmission system.
  • the main component of the photoelectric conversion unit is a photosensitive drum.
  • the charging unit mainly includes a positive charge grid-controlled corona charging roller or other forms of charging roller.
  • the developing unit is composed of a toner storage chamber for storing toner, a developing chamber, and a developing roller.
  • the transfer unit mainly includes a transfer roller.
  • the fixing unit is composed of a heat roller and a pressure roller.
  • a common developing cartridge or process cartridge generally includes a photoelectric conversion unit, a charging unit, and a developing unit.
  • the developing cartridge includes only the developing unit, and the laser image forming apparatus is assembled by the developing cartridge including only the developing unit and the laser image forming apparatus main assembly.
  • the surface of the photosensitive drum is uniformly charged by the charging roller.
  • the laser scanner emits a modulated laser light containing image information to the photosensitive drum to form an electrostatic latent image corresponding to the image to be reproduced on the surface of the photosensitive drum.
  • the toner from the developing roller is in turn adsorbed on the surface of the photosensitive drum to convert the electrostatic latent image into a visible image.
  • the visible image formed by the toner on the surface of the photosensitive drum is transposed to the transfer roller.
  • the visible image is transferred onto a recording medium such as paper, and then the visible image formed on the recording medium is heated and pressurized by the heating roller and the pressure roller, and the visible image formed by the carbon powder is completely cured. On the recording medium. This completes a basic imaging operation.
  • connection modes of the developing unit that connects the developing unit and the photoelectric conversion unit in a movable manner is to respectively provide corresponding pin and pin holes at both axial ends of the developing unit and the photoelectric conversion unit, and between the two Set the spring.
  • the connection between the two is achieved by the cooperation of the pin and the pin hole, and the surface of the developing roller of the developing unit is kept in contact with the surface of the photosensitive drum of the photoelectric conversion unit by the action of the spring.
  • This connection allows the developing unit and the photoelectric conversion unit to rotate in a range around the axis of the pin and the pin hole even in the mounted state.
  • the developing cartridge 1 is composed of a developing unit 4 and a photoelectric conversion unit 3, and a handle 2 for carrying it is attached.
  • a photosensitive drum (not shown) is mounted on the drum shaft 33 at both ends of the photoelectric conversion unit 3, and a charging roller (not shown) for charging the photosensitive drum is built in the photoelectric conversion unit 3.
  • a developing roller for converting an electrostatic latent image of a drum surface into a visible image, a powder feeding roller for conveying toner to the developing roller, a powder container for storing toner, and a stirring frame for agitating the toner Inside the frame of the developing unit 4 (neither shown in the drawing).
  • the side of the photoelectric conversion unit frame 31 facing away from the photosensitive drum is provided with a docking chamber having a shape adapted to the developing unit frame, and the side of the developing unit 4 where the developing roller is located faces the photosensitive drum and is inserted into the docking chamber until the surface of the developing roller touches the surface of the photosensitive drum
  • the developing unit 4 is assembled in position, as shown in Fig. 1, after which the developing unit 4 is still partially exposed outside the docking bin.
  • the assembly of the assembly is achieved between the developing unit 4 and the photoelectric conversion unit 3 by means of the mutual cooperation of the bracket and the chute.
  • the lateral ends of the photoelectric conversion unit frame 31 are provided with chutes 32.
  • the lateral ends of the developing unit 4 are provided with respective support tubes 42.
  • the chute 32 is shaped like a tree fork, and is constituted by a support bar 322 and a bead 321 attached to the photoelectric conversion unit frame 31.
  • the fork of the chute 32 faces away from the side where the photosensitive drum of the photoelectric conversion unit 3 is located, and the top of the fork is directed to the side where the photosensitive drum of the photoelectric conversion unit 3 is located.
  • the bottom 323 of the chute 32 is constituted by a part of the photoelectric conversion unit frame 31.
  • the opening width of the fork 32 is larger than the diameter of the support tube 42 of the developing unit 4, and the square circumferential diameter of the bottom portion 323 corresponds to the diameter of the support tube 42 of the developing unit 4, and the middle width of the sliding groove 32 is smaller than the support of the developing unit 4.
  • the diameter of the tube 42 Thereby, at the fork portion of the chute 32, the support tube 42 of the developing unit 4 can smoothly enter therein.
  • the elastic deformation of the bead 321 is applied in a direction perpendicular to the traveling direction of the chute 32, allowing the support tube 42 of the developing unit 4 to slide.
  • the support tube 42 of the final developing unit 4 is positioned at the bottom 323 of the chute 32.
  • the attachment wrench 41 is usually attached.
  • the attachment wrench 41 is essentially a single lever.
  • the fulcrum is disposed on the outer wall of the frame of the developing unit 4, and the two force arms are distributed on both sides of the fulcrum.
  • the power arm L1 converts the externally supplied power through its force arm L2 into a function of the photoelectric conversion unit frame 31 and the developing unit frame that the developing unit 4 is withdrawn from the photoelectric conversion unit docking chamber. In this mode of action, due to the asymmetry of the retraction force of the developing unit 4, the retraction force of the developing unit 4 cannot be uniformly distributed to the support tubes 42 at both ends thereof, so that the developing unit 4 is often easily caused.
  • An object of the present invention is to provide a developing cartridge for a laser printer which can be easily detached from a developing unit and a photoelectric conversion unit.
  • the developing cartridge for a laser printer used according to the above object comprises a developing unit 4 composed of at least a developing roller, a powder feeding roller, a powder discharging knife and a toner hopper, and a photoelectric conversion unit 3 composed of a photosensitive drum and a charging roller.
  • the developing unit 4 is detachably mounted in the docking chamber of the photoelectric conversion unit 3 by the cooperation of the two symmetrical support tubes 42 provided thereon and the corresponding chutes 32 provided on the photoelectric conversion unit 3.
  • a developing mechanism for ejecting the developing unit 4 from the docking bin is provided on the frame of the developing unit 4.
  • the detaching mechanism is a caliper-like lever 5 composed of two mutually connected levers, the fulcrum is located in the middle between the two urging points where the two symmetrical support tubes 42 are in contact with the chute 32, and the resultant force is perpendicular to the direction. In the developing roller direction of the developing unit 4.
  • Figure 1 is a schematic perspective view of a conventional developing cartridge
  • Figure 2 is a partial perspective view of a conventional developing cartridge
  • Figure 3 is a schematic perspective view of the developing cartridge of the present invention.
  • Figure 4 is a schematic structural view of the exit mechanism of the developing cartridge of the present invention.
  • Figure 5 is a schematic view showing the structure of the exit mechanism of the conventional developing cartridge.
  • the developing cartridge 1 is composed of a developing unit 4 and a photoelectric conversion unit 3.
  • a photosensitive drum (not shown) is mounted on the drum shaft 33 at both end portions of the photoelectric conversion unit 3, and a charging roller (not shown) for charging the photosensitive drum is built in the photoelectric conversion unit 3.
  • a developing roller for converting an electrostatic latent image of a drum surface into a visible image, a powder feeding roller for conveying toner to the developing roller, a powder container for storing toner, and a stirring frame for agitating the toner Inside the frame of the developing unit 4 (neither shown in the drawing).
  • the side of the photoelectric conversion unit frame 31 facing away from the photosensitive drum is provided with a docking chamber having a shape adapted to the frame of the developing unit 4, and the side of the developing unit 4 where the developing roller is located faces the photosensitive drum and is inserted into the docking chamber, and the surface of the developing roller touches the surface of the photosensitive drum At this time, the developing unit 4 is assembled in position, as shown in Fig. 1, after which the developing unit 4 is still partially exposed outside the docking chamber. The assembly of the assembly is achieved between the developing unit 4 and the photoelectric conversion unit 3 by means of the mutual cooperation of the bracket and the chute.
  • the assembly method of the assembly is realized by the following structure, as shown in FIG.
  • the lateral ends of the photoelectric conversion unit frame 31 are provided with chutes 32.
  • the lateral ends of the developing unit 4 are provided with respective support tubes 42.
  • the chute 32 is shaped like a tree fork, and is constituted by a support bar 322 and a bead 321 attached to the photoelectric conversion unit frame 31.
  • the fork of the chute 32 faces away from the side where the photosensitive drum of the photoelectric conversion unit 3 is located, and the top of the fork, that is, the bottom 323 of the chute 32 points to the side where the photosensitive drum of the photoelectric conversion unit 3 is located, which is composed of the photoelectric conversion unit frame 31. Part of it is formed.
  • the width of the mouth of the chute 32 is larger than the diameter of the support tube 42 of the developing unit 4, and the square diameter of the bottom 323 corresponds to the diameter of the support tube 42 of the developing unit 4.
  • the width of the middle portion of the chute 32 is smaller than the diameter of the support tube 42 of the developing unit 4.
  • the surface of the developing roller touches the surface of the photosensitive drum, and the developing unit 4 and the photoelectric conversion unit 3 are assembled to enter the standby operation state.
  • a middle position between two stress receiving points corresponding to the two symmetrical support tubes 42 in contact with the chute 32 is provided with a retracting mechanism for ejecting the developing unit 4 from the above-mentioned docking bin.
  • the disengagement mechanism is a pliers-like composite lever 5 composed of two mutually connected levers. Its fulcrum 53 is located on the frame of the developing unit 4 corresponding to the middle portion between the two urging points where the two symmetrical support tubes 42 are in contact with the chute 32. Its power arm 52 is directed to the outside of the developing unit 4.
  • the resultant force generated by the resistance arm 51 acts on the frame of the developing unit 4, and the resultant force direction is perpendicular to the developing roller axial direction of the developing unit 4.
  • the resultant force generated by the resistance arm 51 is connected according to two symmetric support tubes 42
  • the magnitude of the resistance of the two points of force of the contact groove 32 is correspondingly distributed to the two points of force.
  • the developing unit since the clamp levers which are structurally symmetrical with each other are employed, the developing unit is only subjected to the pointing exit which is uniformly applied to the two support tubes of the developing unit when exiting the docking chamber of the photoelectric conversion unit.
  • the force of the direction and the reaction force, and the force is balanced and stably passed through the two support tubes without the shear force or the rotational moment. Therefore, the developing unit can smoothly exit the docking chamber of the photoelectric conversion unit as a whole, thereby eliminating the hysteresis caused by the single lever to the developing unit during the withdrawal process, and reducing the damage rate of the developing cartridge due to the disassembly.

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

Description

激光打印机用显影盒 技术领域
本发明涉及激光打印机用显影盒， 特别是包括显影单元和光电转换单元， 带有拆卸装置， 与激光扫描单元、 转印辊所在的转印单元以及定影辊所在 的定影单元相互分离， 用于把感光鼓产生的静电潜像转换成由碳粉等显影 剂记录为可视图像的显影盒。 背景技术
通常的影像形成装置包括复印机、 激光打印机、 传真机、 色带打印 机以及 LED打印机等。
在激光扫描或激光照排形式的影像形成装置中， 碳粉是实现图一一 光一一电一一图转换的调色剂。 通常， 鼓、 粉一体式成像装置的显影辊 就设置于感光鼓周围， 以利碳粉影像形成于感光鼓上。 显影辊的碳粉来 自碳粉仓。 碳粉仓的储粉量受仓体容积限制， 因此， 粉仓中的碳粉用尽 后须由专用的显影盒提供。
激光影像形成装置的主要功能块包括： 激光扫描单元、 光电转换单 元、 充电单元、 显影单元、 转印单元和定影单元。 激光扫描单元的主要 构件是激光发生器和光线反射透射系统。 光电转换单元的主要构件是感 光鼓。 充电单元主要包括正电荷栅控式电暈充电辊或其它形式的充电辊。 显影单元由用于储存碳粉的储粉室、 显影室和显影辊构成。 转印单元主 要包括转印辊。 定影单元由加热辊和加压辊构成。 常见的显影盒或处理 盒通常包括光电转换单元、 充电单元、 显影单元。 也有将光电转换单元、 充电单元直接设置于激光影像形成装置主机上， 而显影盒则仅包括显影 单元， 由仅包括显影单元的显影盒与激光影像形成装置主机形成总成装 配的激光影像形成装置。
在显影盒装入激光打印机的使用状态下， 感光鼓表面由充电辊均匀 地充电。 激光扫描器向感光鼓发射含有图像信息的经过调制的激光， 在 感光鼓表面形成与待复制图像对应的静电潜像。 之后， 来自显影辊的碳 粉转而吸附在感光鼓表面上使静电潜像转换成可视图像。 随着感光鼓的 旋转， 由碳粉在感光鼓表面形成的可视图像换位至转印辊。 经转印辊转
1
确 认 本 印电压的作用， 将可视图像转印至纸张等记录介质上， 随后经加热辊和 加压辊对记录介质上的可视图像进行加热加压后， 将碳粉形成的可视图 像完全固化于记录介质上。 这样完成一个基本成像操作。
以活动方式连接显影单元和光电转换单元的显影盒中，其连接方式之一是 在显影单元和光电转换单元的轴向两端分别设置相应的栓销和栓销孔，并在两 者之间设置弹簧。通过栓销和栓销孔的配合实现两者的连接，通过弹簧施加的 作用使显影单元的显影辊表面与光电转换单元的感光鼓表面保持接触。此连接 方式使显影单元和光电转换单元即使在安装状态下也可绕栓销和栓销孔所在 轴作一定范围的转动。
此外， 还有一种在安装状态下保持固定的连接方式， 如图 1、 2所示。 该 显影盒 1由显影单元 4和光电转换单元 3构成，此外还附设有方便携带的提手 2。感光鼓（图中未示出）安装在光电转换单元 3两端部的鼓轴 33上， 用于向 感光鼓充电的充电辊（图中未示出）内置于光电转换单元 3中。用于将感光鼓 鼓面的静电潜像转换成可视图像的显影辊、用于向显影辊输送碳粉的送粉辊以 及用于储藏碳粉的容粉仓和搅拌碳粉的搅拌架设置于显影单元 4框架内部（图 中均未示出）。光电转换单元框架 31背向感光鼓的一侧设置有形状与显影单元 框架适应的对接仓，显影单元 4显影辊所在的一侧面向感光鼓插入对接仓中， 至显影辊表面触及感光鼓表面时，显影单元 4装配到位， 如图 1所示， 之后显 影单元 4尚有部分敞露在对接仓外部。显影单元 4和光电转换单元 3之间通过 支架与滑槽的相互配合的方式实现总成装配。
这种总成装配方式通过如下结构实现， 如图 2所示。 光电转换单元框架 31的横向两端部设置有滑槽 32。显影单元 4的横向两端设置有相应支撑管 42。 滑槽 32形似树叉状， 它由光电转换单元框架 31上附设的支撑条 322和压条 321构成。 滑槽 32的叉口背向光电转换单元 3感光鼓所在的一侧， 其叉顶指 向光电转换单元 3感光鼓所在的一侧。 滑槽 32的底部 323由光电转换单元框 架 31的一部分构成。 滑槽 32叉口的开口宽度大于显影单元 4的支撑管 42的 直径， 其底部 323的方圆周径相应于显影单元 4的支撑管 42的直径， 滑槽 32 的中部宽度小于显影单元 4的支撑管 42的直径。由此，在滑槽 32的叉口部位， 显影单元 4的支撑管 42可以顺利进入其内。在滑槽 32中段的收缩部位，通过 压条 321的弹性变形在垂直于滑槽 32行进方向施加的弹性作用， 允许显影单 元 4的支撑管 42滑过。最终显影单元 4的支撑管 42定位于滑槽 32的底部 323。 在拆卸显影单元 4时， 通常依靠附设扳手 41。 该附设扳手 41实质上是一 个单一杠杆。其支点设置于显影单元 4框架外壁上，其两个力臂分布于支点两 侧。其动力臂 L1将外部提供的动力通过其受力臂 L2， 转化为由光电转换单元 框架 31和显影单元框架共同承受的使显影单元 4回撤出光电转换单元对接仓 的作用。在这种作用方式下， 由于显影单元 4所受回撤力的非对称性， 使显影 单元 4所受回撤力不能均匀地分布于其两端支撑管 42， 以致于往往容易造成 显影单元 4一端受力大， 另一端受力小， 受力大的一端退出滑槽 32， 受力小 的一端滞留于滑槽 32内 （参见图 5)， 并进而由此造成滑槽 32受损， 最终破 坏显影单元 4与光电转换单元 3之间的连接配位关系。 发明内容
本发明目的在于提供一种可方便拆卸其显影单元和光电转换单元的激光 打印机用显影盒。
根据上述目的采用的激光打印机用显影盒，包括至少由显影辊、送粉辊、 出粉刀和碳粉仓构成的显影单元 4和感光鼓、充电辊构成的光电转换单元 3。显影单元 4通过其上设置的两个对称的支撑管 42与光电转换单元 3上 设置的相应滑槽 32的配合， 可拆卸地安装于光电转换单元 3的对接仓中。 显影单元 4框架上设置有用于使显影单元 4退出上述对接仓的退位机构。 该退位机构是由两根相互交叉连接的杠杆构成的钳状杠杆 5， 其支点位于 两个对称支撑管 42与滑槽 32接触的两个受力点之间的中部，其产生的合 力方向垂直于显影单元 4的显影辊轴向。 附图说明
图 1现有显影盒立体结构示意图； - 图 2现有显影盒局部立体结构示意图；
图 3本发明显影盒立体结构示意图；
图 4本发明显影盒的退出机构结构示意图；
图 5现有显影盒的退出机构结构示意图。
以下结合各图及实施例对本发明作进一步说明。 具体实施方式 参见图 3、 4，显影盒 1由显影单元 4和光电转换单元 3构成。感光鼓（图 中未示出） 安装在光电转换单元 3两端部的鼓轴 33上， 用于向感光鼓充电的 充电辊（图中未示出）内置于光电转换单元 3中。用于将感光鼓鼓面的静电潜 像转换成可视图像的显影辊、用于向显影辊输送碳粉的送粉辊以及用于储藏碳 粉的容粉仓和搅拌碳粉的搅拌架设置于显影单元 4框架内部（图中均未示出）。 光电转换单元框架 31背向感光鼓的一侧设置有形状与显影单元 4框架适应的 对接仓，显影单元 4显影辊所在的一侧面向感光鼓插入对接仓中，至显影辊表 面触及感光鼓表面时， 显影单元 4装配到位， 如图 1所示， 之后显影单元 4 尚有部分敞露在对接仓外部。显影单元 4和光电转换单元 3之间通过支架与滑 槽的相互配合的方式实现总成装配。
其总成装配方式通过如下结构实现， 如图 3所示。 光电转换单元框架 31 的横向两端部设置有滑槽 32。 显影单元 4的横向两端设置有相应支撑管 42。 滑槽 32形似树叉状， 它由光电转换单元框架 31上附设的支撑条 322和压条 321构成。 滑槽 32的叉口背向光电转换单元 3感光鼓所在的一侧， 其叉顶， 即滑槽 32的底部 323指向光电转换单元 3感光鼓所在的一侧， 它由光电转换 单元框架 31的一部分形成。滑槽 32叉口的幵口宽度大于显影单元 4的支撑管 42的直径， 其底部 323的方圆周径相应于显影单元 4的支撑管 42的直径。滑 槽 32的中部宽度小于显影单元 4的支撑管 42的直径。 由此， 在滑槽 32的叉 口部位，显影单元 4的支撑管 42可以顺利进入叉口内。在滑槽 32中段的收缩 部位，通过压条 321的弹性变形在垂直于滑槽 32滑行方向向支撑管 42施加的 弹性作用， 允许显影单元 4的支撑管 42滑过。 最终显影单元 4的支撑管 42 定位于滑槽 32的底部 323， 至此， 显影辊表面触及感光鼓表面， 显影单元 4 与光电转换单元 3完成装配， 进入待机工作状态。 在显影单元 4的框架上，对应于两个对称支撑管 42与滑槽 32接触的 两个受力点之间的中部位置，设置有用于使显影单元 4退出上述对接仓的 退位机构。该退位机构是由两根相互交叉连接的杠杆构成的钳状复合杠杆 5。其支点 53位于与两个对称支撑管 42接触滑槽 32的两个受力点之间的 中部对应的显影单元 4框架上。 其动力臂 52指向显影单元 4外部。 其阻 力臂 51产生的合力可作用于显影单元 4的框架， 其合力方向垂直于显影 单元 4的显影辊轴向。该阻力臂 51产生的合力根据两个对称支撑管 42接 触滑槽 32的两个受力点的阻力大小被相应分配于这两个受力点上。 工业应用性
根据本发明的激光打印机用显影盒， 由于采用结构上相互对称的钳状杠 杆， 使得显影单元在退出光电转换单元对接仓时， 其仅受到均匀施加于显 影单元的两个支撑管上的指向退出方向的作用力和反作用力， 且该作用力 均衡稳定地通过这两个支撑管， 而不存在剪切力或旋转力矩。 因此， 显影 单元可以整体平稳地退出光电转换单元的对接仓， 从而消除单只杠杆对显 影单元在退出过程中造成的滞涩现象， 降低显影盒因拆卸造成的受损率。

Claims

权利要求书
1、 激光打印机用显影盒， 包括至少由显影辊、 送粉辊、 出粉刀和碳粉仓 构成的显影单元 （4)和感光鼓、 充电辊构成的光电转换单元 （3), 显影单元
(4)通过其上设置的两个对称的支撑管（42)与光电转换单元（3)上设置的 相应滑槽（32) 的配合可拆卸地安装于光电转换单元（3) 的对接仓中， 显影 单元（4)框架上设置有用于使显影单元（4)退出所述对接仓的退位机构， 其 特征在于所述退位机构是由两根相互交叉连接的杠杆构成的钳状杠杆（5)，所 述钳状杠杆 （5) 的支点位于所述两个对称支撑管 （42) 与滑槽 (32)接触的 两个受力点之间的中部， 所述钳状杠杆 （5)产生的合力方向垂直于显影单元
(4) 的显影辊轴向。
PCT/CN2006/002781 2005-10-29 2006-10-19 Cartouche de developpement WO2007048325A1 (fr)

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Citations (4)

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Publication number Priority date Publication date Assignee Title
US4850303A (en) * 1988-03-10 1989-07-25 Xerox Corporation Developer apparatus with removable developer waste sump
JPH0816068A (ja) * 1994-07-01 1996-01-19 Canon Inc カートリッジシャッタの開閉機構
US20020067930A1 (en) * 2000-10-31 2002-06-06 Toru Oguma Developing device, process cartridge and electrophotographic image forming apparatus
CN1431564A (zh) * 2002-01-11 2003-07-23 佳能株式会社 处理盒和电子照相成像装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4850303A (en) * 1988-03-10 1989-07-25 Xerox Corporation Developer apparatus with removable developer waste sump
JPH0816068A (ja) * 1994-07-01 1996-01-19 Canon Inc カートリッジシャッタの開閉機構
US20020067930A1 (en) * 2000-10-31 2002-06-06 Toru Oguma Developing device, process cartridge and electrophotographic image forming apparatus
CN1431564A (zh) * 2002-01-11 2003-07-23 佳能株式会社 处理盒和电子照相成像装置

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