WO2013010452A1 - 清洁刮刀 - Google Patents

清洁刮刀 Download PDF

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Publication number
WO2013010452A1
WO2013010452A1 PCT/CN2012/078556 CN2012078556W WO2013010452A1 WO 2013010452 A1 WO2013010452 A1 WO 2013010452A1 CN 2012078556 W CN2012078556 W CN 2012078556W WO 2013010452 A1 WO2013010452 A1 WO 2013010452A1
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WO
WIPO (PCT)
Prior art keywords
blade
mounting groove
cleaning blade
elastic member
cleaning
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Application number
PCT/CN2012/078556
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English (en)
French (fr)
Inventor
苏健强
Original Assignee
珠海天威飞马打印耗材有限公司
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Publication of WO2013010452A1 publication Critical patent/WO2013010452A1/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
    • G03G21/0005—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium
    • G03G21/0011—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium using a blade; Details of cleaning blades, e.g. blade shape, layer forming
    • G03G21/0029—Details relating to the blade support

Definitions

  • the present invention relates to a cleaning blade, and more particularly to a cleaning blade for removing developer remaining on a photosensitive member.
  • the present application claims priority to Chinese Patent Application No. 2011-10200942.0, entitled “Cleaning Scraper”, which is incorporated herein by reference.
  • An electrophotographic image forming apparatus such as a laser printer, is an apparatus that forms an image on an image forming medium such as paper by a process of charging, exposing, developing, transferring, fixing, and cleaning using an electrophotographic principle.
  • the developer required for imaging is usually provided by a developer cartridge detachably mounted to the image forming apparatus.
  • the surface of the photosensitive member such as the photosensitive drum, is uniformly charged with a predetermined charge by means of a charging device, such as a corona discharge method; during exposure, a selective exposure is applied to the surface of the photosensitive member that has been charged with a uniform predetermined charge.
  • a charging device such as a corona discharge method
  • the electric charge of the exposed region will be grounded, so that the surface of the photosensitive member after exposure forms an electrostatic latent image corresponding to the charge distribution to be formed by the image; during the development process,
  • the developer such as carbon powder, for forming a visible image is sent to the electrostatic latent image area of the surface of the photosensitive member by a force such as an electric field force, so that the electrostatic latent image is visualized; a process of transferring a developer on an electrostatic latent image on a surface of a photosensitive member to an image forming medium such as paper by a transfer device such as a transfer roller; and transferring the developer onto the image forming medium by a fixing device during a fixing process Secure on the image forming medium.
  • the cleaning process the developer remaining on the surface of the photosensitive member is scraped off by a cleaning device such as a cleaning blade to prevent the residual developer from entering the next image forming cycle, causing printing defects.
  • the prior art cleaning blade is fixed, and the positional relationship between the cleaning blade and the photosensitive member is also fixed. Therefore, the cleaning effect varies depending on the geometry of the cleaning blade and the photosensitive member, assembly error, and the like. It is possible that the cleaning blade is subjected to different pressures due to these errors and eventually causes the blade to flip. In addition, the tool holder is made of metal and the price is relatively expensive.
  • Fig. 12 is a view showing the structure of a cleaning blade 10 of the prior art, comprising a metal holder 11 and a plastic blade 12 which is fixed to the metal holder 11 by casting or bonding.
  • Figure 13 is a positional relationship of the cleaning blade shown in Figure 12 and the photosensitive member 2 in operation, the cleaning blade 10 is fixed to the casing 3 of the developer cartridge by screws, and the photosensitive member 2 is rotatably disposed by the positioning pin 21
  • the position of the photosensitive member 2 on the housing 3 is determined, so that the relative position between the cleaning blade 1 and the photosensitive member 2 is fixed, between the plastic blade 12 of the cleaning blade 10 and the photosensitive member 2.
  • Contact pressure cannot be adjusted automatically.
  • Such a cleaning blade has a problem that the blade is turned over due to excessive contact pressure and assembly pressure, and the cleaning effect is poor due to insufficient pressure.
  • a cleaning blade including a tool holder and a blade, and an elastic member is further disposed between the blade and the blade holder, and the blade is movable through the elastic member Grounded on the tool holder.
  • the tool holder has a mounting groove for accommodating the blade, the elastic member is positioned at a bottom of the mounting groove, a part of the blade is located in the mounting groove, and the The inner side of the blade is resiliently supported on the resilient member to effect reciprocation of the blade within the mounting slot.
  • the bottom of the mounting groove is formed with a positioning post
  • the elastic element is a spring sleeved on the positioning post
  • the length of the spring when unstressed is greater than the length of the positioning post length
  • the resilient element is an elastomeric rubber post that is inserted into the locating aperture.
  • the elastic members have at least two.
  • the elastic member is a toothed elastic rubber strip fixed to the bottom of the mounting groove.
  • the tool holder is an injection molded part made of a plastic material by an injection molding process. Since the price of plastic raw materials is lower than that of metal materials and the injection molding process is highly efficient, the manufacturing cost is low.
  • the invention has the beneficial effects that: since the blade is disposed on the tool holder through the elastic member, the blade can reciprocate relative to the tool holder by the action of the elastic member, and when the cleaning blade is installed in the developer cartridge or in the image forming apparatus, The adjustment of the elastic member can always maintain a proper contact pressure between the blade and the photosensitive member, thereby avoiding the problem that the blade is turned over due to excessive contact pressure or the cleaning effect is not good due to insufficient contact pressure.
  • Figure 1 is a perspective view of a first embodiment of the present invention.
  • Figure 2 is a cross-sectional view of the mounting groove of the first embodiment shown in Figure 1.
  • Figure 3 is an exploded perspective view of the first embodiment of Figure 1.
  • Figure 4 is an enlarged view of the spring in the first embodiment shown in Figure 3.
  • Figure 5 is a schematic view showing the working principle of the first embodiment shown in Figure 1.
  • Figure 6 is an exploded perspective view of a second embodiment of the present invention.
  • Figure 7 is a cross-sectional view of the mounting groove of the second embodiment shown in Figure 6.
  • Figure 8 is an enlarged view of the elastic rubber column in the second embodiment shown in Figure 6.
  • Figure 9 is an exploded perspective view of a third embodiment of the present invention.
  • Figure 10 is a cross-sectional view of the mounting groove of the third embodiment shown in Figure 9.
  • Figure 11 is an enlarged view of the toothed elastic rubber strip in the third embodiment shown in Figure 9.
  • Figure 12 is a schematic view showing the structure of a cleaning blade of the prior art.
  • Figure 13 is a schematic view showing the positional relationship of the cleaning blade and the photosensitive member shown in Figure 12 during operation.
  • a first embodiment of the cleaning blade of the present invention comprises a tool holder 4 and an insert 1 which is an injection molded part made of a plastic material by an injection molding process, and the blade 1 is a sheet of PU material.
  • the tool holder 4 has a mounting groove 41 for accommodating the blade 1, and a spring 5 positioned at the bottom of the mounting groove 41 is disposed between the blade 1 and the tool holder 4, and the number of the springs 5 is two or more.
  • the bottom of the mounting groove 41 is formed with a plurality of positioning posts 42 corresponding to the springs 5.
  • the positioning posts 42 are evenly distributed at the bottom of the mounting slots 41.
  • Each spring 5 is sleeved on a positioning post 42 for positioning.
  • the length is greater than the length of the positioning post 42.
  • a portion of the blade 4 is located in the mounting groove 41, and the inner side of the blade 4 is elastically supported on the spring 5, and the reciprocation of the blade 1 in the mounting groove 41 can be achieved by the action of the spring 5.
  • the above cleaning blade can be installed in a developer cartridge or used inside an image forming apparatus.
  • the holder 4 of the cleaning blade when mounted in the developer cartridge, the holder 4 of the cleaning blade is fixed to the casing 3 of the developer cartridge by screws or the like, and the photosensitive member 2 is rotatably provided on the casing 3.
  • the spring 5 is first mounted on the evenly distributed positioning post 42 on the bottom of the mounting groove 41, and then the blade 1 is mounted into the mounting groove 41 so that the inner side of the blade 1 is in contact with the spring 5, and the outer side is in contact with the photosensitive member 2.
  • the elastic force of the spring 5 is used to maintain a proper contact pressure between the blade 1 and the photosensitive member 2 to compensate for manufacturing errors and assembly errors of the respective components.
  • two or more positioning holes 43 are formed at the bottom of the mounting groove 41 of the tool holder 4, and the elasticity as an elastic member is provided between the blade 1 and the tool holder 4.
  • the rubber column 6, the number of the elastic rubber columns 6 corresponds to the number of the positioning holes 43, and each of the elastic rubber posts 6 is inserted into a positioning hole 43.
  • a toothed elastic rubber strip 7 as an elastic member is disposed between the blade 1 and the tool holder 4, and the toothed elastic rubber strip 7 is directly fixed by mounting or the like.
  • the above embodiments are only preferred embodiments of the present invention.
  • the present invention may further have more variations, for example, changes in the positioning structure of the bottom of the tool holder mounting groove, and changes in the type and number of elastic members. Variations in the material of the tool holder, and the like, can achieve the object of the present invention without departing from the scope of the present invention.
  • the cleaning blade of the present invention can be manufactured and used industrially.
  • the adjustment of the elastic member can maintain a proper contact pressure between the blade and the photosensitive member, thereby preventing the blade from being turned over due to excessive contact pressure or The problem of poor cleaning due to insufficient contact pressure. Therefore, the present invention has industrial applicability.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Cleaning In Electrography (AREA)

Abstract

本发明公开了一种清洁刮刀，用于除去光敏元件上残留的显影剂。该清洁刮刀包括刀架（4）和刀片（1），所述刀片（1）与刀架（4）之间还设置有弹性元件（5），所述刀片（1）通过所述弹性元件（5）可活动地设置在所述刀架（4）上。所述刀架（4）上具有容纳所述刀片（1）的安装槽（41），所述弹性元件（5）定位于所述安装槽（41）的底部，所述刀片（1）的一部分位于所述安装槽（41）内，并且该刀片（1）的内侧边弹性地支撑在所述弹性元件（5）上，以实现刀片（1）在所述安装槽（41）内的往复运动。

Description

清洁刮刀 技术领域
本发明涉及一种清洁刮刀，更具体地，涉及一种用于除去光敏元件上残留的显影剂的清洁刮刀。本申请要求于2011年07月18日提交中国专利局、申请号为201110200942.0、名称为“清洁刮刀”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
背景技术
电子照相式的成像设备，如激光打印机，是一种利用电子照相原理，至少经过充电、曝光、显影、转印、定影、清洁的过程，在图像形成介质如纸张上形成图像的设备。成像所需的显影剂通常由可拆卸地安装至成像设备的显影剂盒来提供。
　　在充电过程，通过充电装置，利用如电晕放电方式对光敏元件如感光鼓的表面均匀地充上预定的电荷；在曝光过程，对已充上均匀预定电荷的光敏元件表面进行选择性的曝光，由于光敏元件的光敏特性，被曝光的区域的电荷将被接地消去，这样，在曝光后光敏元件表面形成一对应于所欲形成图像的由电荷分布所表征的静电潜像；在显影过程，通过显影装置，把用于形成可视图像的显影剂如碳粉，配合作用力如电场力的作用送到光敏元件的表面的静电潜像区，使得上述的静电潜像获得可视化；在转印过程，通过转印装置，如转印辊，把光敏元件表面的静电潜像上的显影剂转移到图像形成介质如纸张上；在定影过程，通过定影装置把转移到图像形成介质上的显影剂牢固于图像形成介质上。在清洁过程，通过清洁装置如清洁刮刀，将光敏元件表面残留的显影剂刮掉，以免使残留显影剂进入下一个成像周期，造成打印缺陷。
　　现有技术的清洁刮刀都是固定式的，它与光敏元件之间的位置关系也是固定的，因此，清洁的效果会因为清洁刮刀和光敏元件的几何尺寸、装配误差等等因素而不同，还有可能因为这些误差而导致清洁刮刀受到不同的压力而最终导致刀片翻转。另外，刀架为金属材料，价格比较贵。
　　图12是现有技术的一种清洁刮刀10的结构，包括金属刀架11和塑料刀片12，塑料刀片12通过浇铸或者粘接的方式固定在金属刀架11上。图13是图12所示的清洁刮刀与光敏元件2在工作时的位置关系，清洁刮刀10通过螺钉固定在显影剂盒的壳体3上，而光敏元件2通过定位销21可转动地设置在壳体3上，光敏元件2在壳体3上的位置是确定的，因此清洁刮刀1与光敏元件2之间的相对位置是固定的，清洁刮刀10的塑料刀片12与光敏元件2之间的接触压力不能自动调节。这种清洁刮刀存在着由零部件生产误差及装配误差而引起的因接触压力过大而使刀片翻转或者因压力不够而导致清洁效果欠佳的问题。
 技术问题
本发明的目的在于提供一种能够自动调节接触压力的清洁刮刀，以解决现有技术存在的因刀片与光敏元件之间接触压力过大而使得刀片翻转或者因压力不够而导致清洁效果欠佳的问题。
技术解决方案
为解决上述技术问题，本发明采用了以下技术方案：提供一种清洁刮刀，包括刀架和刀片，所述刀片与刀架之间还设置有弹性元件，所述刀片通过所述弹性元件可活动地设置在所述刀架上。
　　作为对上述技术方案的进一步改进，所述刀架上具有容纳所述刀片的安装槽，所述弹性元件定位于所述安装槽的底部，所述刀片的一部分位于所述安装槽内，并且该刀片的内侧边弹性地支撑在所述弹性元件上，以实现刀片在所述安装槽内的往复运动。
　　在一种实施例中，所述安装槽的底部形成有定位柱，所述弹性元件为套置于所述定位柱上的弹簧，所述弹簧在未受力时的长度大于所述定位柱的长度。
　　在另一种实施例中，所述弹性元件为插置于所述定位孔的弹性橡胶柱。
　　在上述两种实施例中，优选地，所述弹性元件至少有两个。
　　在又一种实施例中，所述弹性元件为固定在所述安装槽底部的齿形弹性橡胶条。
　　优选地，所述刀架为采用塑胶材料通过注塑工艺制成的注塑件。因为塑胶原材料价格相比金属材料价格低而且注塑工艺生产效率高，因此制造成本较低。
 有益效果
本发明的有益效果在于：由于刀片通过弹性元件设置在刀架上，通过弹性元件的作用，刀片能够相对于刀架实现往复移动，当清洁刮刀安装在显影剂盒内或成像设备当中时，通过弹性元件的调节，刀片与光敏元件之间可始终保持合适的接触压力，可避免因接触压力过大而使刀片翻转或者因接触压力不够而导致清洁效果欠佳的问题。
附图说明
图1是本发明的第一种实施例的立体图。
　　图2是图1所示第一种实施例的安装槽处的剖视图。
　　图3是图1所示第一种实施例的零件分解图。
　　图4是图3所示第一种实施例中的弹簧的放大图。
　　图5是图1所示第一种实施例的工作原理示意图。
　　图6是本发明的第二种实施例的零件分解图。
　　图7是图6所示第二种实施例的安装槽处的剖视图。
　　图8是图6所示第二种实施例中的弹性橡胶柱的放大图。
　　图9是本发明的第三种实施例的零件分解图。
　　图10是图9所示第三种实施例的安装槽处的剖视图。
　　图11是图9所示第三种实施例中的齿形弹性橡胶条的放大图。
　　图12是现有技术的一种清洁刮刀的结构示意图。
　　图13是图12所示清洁刮刀与光敏元件在工作时的位置关系示意图。
 本发明的实施方式
下面将详细描述本发明的各种实施方式，其中的实施例结合附图进行说明并在下文中描述。尽管本发明将结合示例性实施方式进行说明，应当理解本发明不限于这些示例性实施方式。相反，本发明不仅包括这些实施方式，而且还包括各种变形、改进。
　　实施例一
　　参见图1至图4，本发明清洁刮刀的第一种实施例包括了刀架4和刀片1，刀架4为采用塑胶材料通过注塑工艺制成的注塑件，刀片1为PU材料的片体。刀架4上具有容纳刀片1的安装槽41，刀片1与刀架4之间设置有定位于安装槽41底部的弹簧5，弹簧5的数量有两个或两个以上。安装槽41的底部形成有数量与弹簧5对应的定位柱42，定位柱42在安装槽41底部均匀分布，每根弹簧5套置在一根定位柱42上实现定位，弹簧在未受力时的长度大于定位柱42的长度。刀片4的一部分位于安装槽41内，并且该刀片4的内侧边弹性地支撑在弹簧5上，通过弹簧5的作用，可实现刀片1在安装槽41内的往复运动。
　　上述清洁刮刀可以安装在显影剂盒内或者成像设备内部进行使用。参见图5，当安装在显影剂盒内时，清洁刮刀的刀架4通过螺钉等方式固定在显影剂盒的壳体3上，而光敏元件2可转动地设置在壳体3上。先将弹簧5安装到安装槽41底部上均匀分布的定位柱42上，再将刀片1安装到安装槽41内，使刀片1的内侧边与弹簧5接触，外侧边与光敏元件2接触，利用弹簧5的弹力使刀片1与光敏元件2之间保持合适的接触压力，以弥补各零件的制造误差及装配误差。
　　实施例二
　　参见图6至图8，在本实施例中，刀架4的安装槽41的底部形成有两个或两个以上的定位孔43，刀片1与刀架4之间设有作为弹性元件的弹性橡胶柱6，弹性橡胶柱6的数量与定位孔43的数量相对应，每根弹性橡胶柱6插置于一个定位孔43内。这种结构的清洁刮刀安装在显影盒内时，刀片1的内侧边与弹性橡胶柱6接触，外侧边与光敏元件2接触，利用弹性橡胶柱6的弹力使刀片1与光敏元件2之间保持合适的接触压力，以弥补各零件的制造误差及装配误差。
　　实施例三
　　参见图9至图11，在本实施例中，刀片1与刀架4之间设有作为弹性元件的齿形弹性橡胶条7，该齿形弹性橡胶条7直接通过粘接等方式固定在安装槽41的底部。这种结构的清洁刮刀安装在显影盒内时，刀片1的内侧边与齿形弹性橡胶条7的齿形部分接触，外侧边与光敏元件2接触，利用齿形弹性橡胶条7的弹力使刀片1与光敏元件2之间保持合适的接触压力，以弥补各零件的制造误差及装配误差。
　　当然，上述实施方式仅是本发明优选的实施方式，实际应用时，本发明还可以有更多的变化，例如，刀架安装槽底部定位结构的变化，弹性元件的类型和数量上的变化，刀架材质上的变化等等，类似这样的改变也能实现本发明的目的，都不脱离本发明的保护范围。
 工业实用性
本发明的清洁刮刀可以在工业上制造和使用。当本发明的清洁刮刀安装在显影剂盒内或成像设备当中时，通过弹性元件的调节，刀片与光敏元件之间可始终保持合适的接触压力，可避免因接触压力过大而使刀片翻转或者因接触压力不够而导致清洁效果欠佳的问题。因此本发明具备工业实用性。

Claims (7)

  1. 清洁刮刀，包括刀架和刀片，其特征在于：所述刀片与刀架之间还设置有弹性元件，所述刀片通过所述弹性元件可活动地设置在所述刀架上。
  2. 根据权利要求1所述的清洁刮刀，其特征在于：所述刀架上具有容纳所述刀片的安装槽，所述弹性元件定位于所述安装槽的底部，所述刀片的一部分位于所述安装槽内，并且该刀片的内侧边弹性地支撑在所述弹性元件上，以实现刀片在所述安装槽内的往复运动。
  3. 根据权利要求2所述的清洁刮刀，其特征在于：所述安装槽的底部形成有定位柱，所述弹性元件为套置于所述定位柱上的弹簧，所述弹簧在未受力时的长度大于所述定位柱的长度。
  4. 根据权利要求2所述的清洁刮刀，其特征在于：所述安装槽的底部形成有定位孔，所述弹性元件为插置于所述定位孔的弹性橡胶柱。
  5. 根据权利要求3或4所述的清洁刮刀，其特征在于：所述弹性元件至少有两个。
  6. 根据权利要求2所述的清洁刮刀，其特征在于：所述弹性元件为固定在所述安装槽底部的齿形弹性橡胶条。
  7. 根据权利要求1所述的清洁刮刀，其特征在于：所述刀架为注塑件。
PCT/CN2012/078556 2011-07-18 2012-07-12 清洁刮刀 WO2013010452A1 (zh)

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CN102331702A (zh) * 2011-07-18 2012-01-25 珠海天威飞马打印耗材有限公司 清洁刮刀
JP5936370B2 (ja) 2012-01-25 2016-06-22 キヤノン株式会社 クリーニング装置、プロセスカートリッジ、画像形成装置
CN108127817B (zh) * 2017-12-27 2019-09-24 台州金福桂再生资源利用有限公司 一种弯曲废旧塑料的刮洗设备

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CN201373981Y (zh) * 2009-03-17 2009-12-30 珠海赛纳科技有限公司 一种显影盒
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