WO2014206206A1 - 激光打印机用感光鼓 - Google Patents

激光打印机用感光鼓 Download PDF

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Publication number
WO2014206206A1
WO2014206206A1 PCT/CN2014/079899 CN2014079899W WO2014206206A1 WO 2014206206 A1 WO2014206206 A1 WO 2014206206A1 CN 2014079899 W CN2014079899 W CN 2014079899W WO 2014206206 A1 WO2014206206 A1 WO 2014206206A1
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WIPO (PCT)
Prior art keywords
force receiving
receiving block
photosensitive drum
laser printer
along
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PCT/CN2014/079899
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English (en)
French (fr)
Inventor
杨晓锋
赖亚勇
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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 WO2014206206A1 publication Critical patent/WO2014206206A1/zh

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/75—Details relating to xerographic drum, band or plate, e.g. replacing, testing
    • G03G15/757—Drive mechanisms for photosensitive medium, e.g. gears

Definitions

  • the present invention relates to a photosensitive drum as a constituent member of a laser printer.
  • the photosensitive drum is composed of a photosensitive member and a transmission member.
  • the present invention is based on a Chinese patent application filed on Jun. 26, 2013, the application number of which is incorporated herein by reference.
  • the image forming process of the laser printer having the processing cartridge 100 as a basic constituent core is that the surface of the photosensitive drum 101 is uniformly charged by the charging roller 102.
  • the laser scanner 103 emits a modulated laser beam 104 containing image information to the outer cylindrical surface of the photosensitive drum 101, and forms a static charge distribution map having a difference in distribution on the cylindrical surface of the photosensitive drum 101 after being irradiated by the laser beam 104. That is, an electrostatic latent image corresponding to the image to be copied.
  • the developer such as the toner 106 from the developing roller 105 is transferred to the cylindrical surface of the photosensitive drum 101 while being adjusted by the powder discharging blade 113, and the electrostatic latent image is covered.
  • the photosensitive drum 101 rotates, the visible image formed by the toner 106 on the surface of the photosensitive drum is shifted to the position where the transfer roller 107 is located.
  • the toner in the form of a visible image is transferred onto the surface of the recording medium 108 such as a sheet by the action of the transfer voltage carried by the transfer roller 107, and then on the recording medium 108 via the heating roller 111 and the pressure roller 112.
  • the carbon powder is infiltrated into the fiber layer of the recording medium 108, and the visible image formed by the carbon powder is permanently solidified on the recording medium 108.
  • the transfer roller 107 After the visible image on the photosensitive drum 101 is transferred by the transfer roller 107, the residual toner 109 adhered thereto is scraped off by the waste toner blade 110 into the waste toner collection chamber, and the surface of the photosensitive drum 101 is correspondingly eliminated.
  • the electrical equipment After the electrical equipment eliminates static electricity, it returns to the standby state of no electricity and no dust. This completes a basic imaging workflow. As a result of the repeated operation of the flow, the image required by the printer can be obtained.
  • the developing roller 105 which is responsible for the developing function
  • the powder discharging blade 113 which is responsible for adjusting the thickness of the toner layer
  • the powder magazine which is responsible for the storage and supply functions of the developer are integrated into a separate developing cartridge.
  • This type of developing cartridge has the effect of storing a powder-based developer and transporting the developer to the surface of the photosensitive drum 101 to develop an electrostatic latent image.
  • the photosensitive drum 101 is disposed directly in the laser printer in advance, or is disposed in the laser printer separately from other components such as the charging roller 102 and the waste toner blade 110 as an electrophotographic image forming unit.
  • the formation of a visible image depends on the continuous rotation of the photosensitive drum 101.
  • the rotation of the photosensitive drum 101 depends on the rotational driving force generated by the laser printer and the transmission member that undertakes the driving task of the driving force.
  • the basic configuration of the photosensitive drum 101 includes a photosensitive member 114 and a transmission member 115.
  • the photosensitive member 114 is generally made of a hollow cylinder made of aluminum, that is, an aluminum cylinder.
  • a photosensitive material is coated on the outer cylindrical surface of the aluminum cylinder.
  • a transmission member 115 is mounted at one axial end of the aluminum cylinder. The transmission member 115 transmits the rotational driving force generated by the laser printer to the photosensitive drum 101 to cause the photosensitive drum 101 to rotate.
  • the configuration of the transmission member 115 is substantially in the form of a cylinder.
  • a drive gear 116 is provided on the outer cylindrical surface of the cylinder.
  • the drive gear 116 can transmit the rotational driving force obtained by the transmission member 115 to the developing roller 105 and the like (refer to FIG. 1).
  • a cylindrical force receiving block 117 is disposed at one end of the transmission member 115 facing away from the photosensitive member 114 in its own axial direction.
  • the radially outer end portion of the force receiving block 117 is provided with four slits 118 whose distribution is symmetrical with respect to the radial center of the force receiving block 117.
  • the opening 118 is open along the radial outer end of the force receiving block 117 and the side of the force receiving block 117 axially facing away from the photosensitive member 114, so that the driving tooth 120 on the laser printer driving head 119 can be inserted into the opening 118. Referring to Figures 6a, b, engagement between the drive teeth 120 and the notches 118 is achieved to obtain the rotational driving force generated by the laser printer.
  • the photosensitive drum 101 obtains a rotational driving force from a laser printer. Since the photosensitive drum 101 is pushed into the laser printer from its own radial direction during assembly, the laser printer driving head 119 first moves along the photosensitive drum 101 during the process in which the photosensitive drum 101 enters the laser printer. After the axial retraction, it rebounds to the state in which the driving teeth 120 are inserted into the slit 118. During this process, since the driving teeth 120 are moved in the radial direction of the force receiving block 117 with respect to the gap 118, the radial centers of both the driving head 119 and the force receiving block 117 are easily misaligned, so that the photosensitive drum 101 is assembled to the laser. The latter four drive teeth 120 in the printer form an asymmetrical and uneven compression on the outer walls of the respective slits 118, damaging the drive teeth 120 or the slits 118, affecting the torque transfer between the photosensitive drum 101 and the laser printer.
  • the present invention aims to provide a photosensitive drum for a laser printer.
  • the present invention has developed a photosensitive drum for a laser printer. It includes a photosensitive member and a transmission member.
  • the transmission member is fixed to one side of the photosensitive member along its length.
  • the transmission member is provided with a cylindrical force receiving block at one end of the photosensitive member along the longitudinal direction of the photosensitive member.
  • the force block is provided with a blind hole recessed in its own axial direction along the outer end wall of the photosensitive member facing away from the axial direction.
  • the blind hole has a continuous wall of holes in the axial section of the force block.
  • the number of blind holes is four. In the axial cross section of the force block, the four blind holes are symmetrically distributed with respect to the radial center of the force block.
  • the radial hole is adjacent to the radial center of the force block in the radial direction of the force block relative to the blind hole
  • the blind hole is adjacent to the outer cylindrical wall of the force block along the force block.
  • the middle part of the blind hole in the radial direction of the force block is along the circumferential direction of the force block The inside of the blind hole is narrowed.
  • the photosensitive drum of the present invention can effectively overcome the phenomenon of misalignment between the driving head and the force receiving block, so as to stably obtain the required rotational driving force from the laser printer, thereby preventing the laser printer driving head and the transmission component of the photosensitive drum from being assembled. And the transmission torque is damaged, so as to ensure the effective transmission of torque between the photosensitive drum and the laser printer, and more effectively transmit the torque transmitted from the driving teeth to the force block.
  • Figure 1 is a schematic view of the working process of the existing laser printer
  • Figure 2 is a perspective view of a photosensitive drum for a conventional laser printer
  • Figure 3 is a perspective view of a photosensitive drum for a conventional laser printer
  • Figure 4 is a perspective view of a photosensitive drum for a conventional laser printer
  • Figure 5 is a perspective view of a photosensitive drum for a laser printer of the present invention.
  • Figure 7 is a perspective view showing the process of docking the photosensitive drum of the present invention with the prior art laser printer driver.
  • the main structure of the photosensitive drum for the laser printer of the present invention is basically the same as that of the prior art in the related art, and those skilled in the art can refer to the related art materials in the related art and the introduction of the background art of the specification to know the laser printer of the present invention.
  • the basic construction condition of the photosensitive drum In view of this, the reference numerals of the members involved in the description of the photosensitive drum for the laser printer of the present invention will continue to follow the reference numerals of the same members of the background art of the present specification.
  • the original intention of the suitable solution is proposed.
  • the applicant will use the photosensitive drum for the laser printer of the present invention to ensure that the photosensitive drum obtains stable rotational driving. The structural part of the force is described in a focused manner.
  • the photosensitive drum 101 is constructed to include a photosensitive member 114 and a transmission member 115.
  • the photosensitive member 114 is a hollow cylinder made of aluminum, that is, an aluminum cylinder as its basic member. A photosensitive layer made of a photosensitive material is coated on the outer cylindrical surface of the aluminum cylinder.
  • the transmission member 115 is a constituent member of the photosensitive drum 101, and its configuration is basically a cylindrical body which is fixedly inserted into the inner cavity at one axial end of the aluminum cylinder.
  • a drive gear 116 is disposed on the outer cylindrical surface of the transmission member 115.
  • the drive gear 116 can transmit the rotational driving force obtained by the transmission member 115 to the developing roller 105 and the like (refer to FIG. 1).
  • a force receiving block 117 having a cylindrical shape is provided at one end of the transmission member 115 facing away from the photosensitive member 114 in its own axial direction.
  • the central axis of the force block 117 coincides with the central axis of the transmission member 115.
  • a blind hole 121 recessed in the axial direction of the force receiving block 117 is provided on the outer end wall 117-1 of the force receiving block 117 facing away from the photosensitive member 114 in its own axial direction.
  • the blind hole 121 does not penetrate the force receiving block 117 in the axial direction of the force receiving block 117, and extends only from the outer end wall 117-1 to the inside of the force receiving block 117 along the axial direction of the force receiving block 117.
  • the wall of the hole enclosing the blind hole 121 is in an uninterrupted continuous connection state.
  • the blind hole 121 is radially adjacent to the force receiving block 117 in the radial direction of the force receiving block 117 with respect to the blind hole 121.
  • the portion of the outer cylindrical wall of the block 117 bulges toward the outside of the blind hole 121 along the circumferential direction of the force receiving block 117 to form two expansion ports 122.
  • the blind hole 121 is radially adjacent to the radial center of the force receiving block 117 with respect to the blind hole 121, and the blind hole 121 is located in the middle of the radial direction of the force receiving block 117.
  • the neck portion 123 is formed by being narrowed toward the inside of the blind hole 121 along the circumferential direction of the force receiving block 117.
  • the number of blind holes 121 is four.
  • the four blind holes 121 are symmetrically distributed with respect to the radial center of the force receiving block 117 in a cross section perpendicular to the axial direction of the force receiving block 117.
  • the four drive teeth 120 on the laser printer drive head 119 are respectively inserted into their corresponding blind holes 121.
  • the driving tooth 120 since the blind hole 121 is radially opposed to the outer wall of the radial center of the transmission member 115 in the radial direction of the transmission member 115, the four driving teeth 120 are not inserted into the blind hole 121 and are not in the transmission member.
  • a movement is formed in the radial direction of 115 to ensure that the laser printer driving head 119 is on the same axis as the radial center of the photosensitive drum force block 117.
  • the width of the neck portion 123 in the circumferential direction of the force receiving block 117 is narrowed.
  • the moving space of the driving teeth 120 in the circumferential direction of the force receiving block 117 is directly restricted between the two walls of the neck portion 123, thereby reducing the driving teeth.
  • 120 forms a swimming gap in contact with one of the two walls of the neck portion 123 in the circumferential direction of the force receiving block 117, thereby ensuring that the driving head 119 is driven by the laser printer after the driving tooth 120 is inserted into the blind hole 121.
  • the 120 is rapidly formed in contact with one of the two walls of the neck portion 123, and the rotational driving force generated by the laser printer is efficiently transmitted to the force receiving block 117 to urge the photosensitive drum 101 to rotate.
  • the present invention is disposed on the outer end wall of the force receiving block of the photosensitive drum transmission component. A concave blind hole.
  • the middle portion of the blind hole in the radial direction of the force block is arranged to be narrowed toward the inside of the blind hole along the circumferential direction of the force block, and as a result, the middle portion of the blind hole in the radial direction of the force block is The width of the force block in the circumferential direction is narrowed.
  • this reduces the running clearance of the driving teeth before the contact with the blind hole wall in the circumferential direction of the force receiving block, so that the driving teeth and the blind hole wall can be quickly formed after the driving teeth are inserted into the blind holes.
  • the contact between them is more effective in transmitting the torque transmitted from the drive teeth to the force block.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Electrophotography Configuration And Component (AREA)

Abstract

一种激光打印机用感光鼓（101），包括光敏部件（114）和传动部件（115）。传动部件（115）被固定于光敏部件（114）沿自身长度方向的一侧。传动部件（115）沿光敏部件（114）长度方向背对光敏部件（114）的一端设置有呈圆柱形的受力块（117）。受力块（117）沿自身轴向背对光敏部件（114）的外端壁上设置有沿自身轴向内凹的盲孔（121）。盲孔（121）在受力块（117）轴向横截面上具有连续的孔壁。盲孔（121）的数量为四个。在受力块（117）轴向横截面上，四个盲孔（121）相对于受力块（117）的径向中心呈对称分布。该感光鼓（101）的受力块（117）与激光打印机驱动头（119）之间对位准确，进而可稳定地从激光打印机获取所需的旋转驱动力。

Description

激光打印机用感光鼓
本发明涉及作为激光打印机的构成部件感光鼓。该感光鼓由光敏部件和传动部件构成。本发明基于申请日为2013年06月26日、申请号为201310261346.2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。
见图1，以处理盒100为基本构成核心的激光打印机的成像过程是，感光鼓101表面由充电辊102均匀地充电。激光扫描器103向感光鼓101外圆柱面发射含有图像信息并且经过调制的激光束104，经激光束104照射后在感光鼓101的圆柱形表面形成其分布存有差异的静电荷分布图，亦即与待复制的图像对应的静电潜像。之后，自显影辊105传来的碳粉106之类的显影剂在经过出粉刀113调节层厚的状态下转而吸附在感光鼓101的圆柱形表面上，将前述静电潜像覆盖后，把其转换成可以肉眼观察的可视图像。随着感光鼓101的旋转，由碳粉106在感光鼓表面形成的可视图像换位至转印辊107所在的位置。经转印辊107所携带的转印电压的作用，将可视图像形式的碳粉转印至纸张等记录介质108的表面上，随后经加热辊111和加压辊112对记录介质108上的可视图像形式的碳粉进行加热加压后，使碳粉渗入到记录介质108的纤维层中，将碳粉形成的可视图像永久地固化于记录介质108上。前述感光鼓101上的可视图像在被转印辊107转印之后，附着于其上的残留碳粉109由废粉刮片110刮除至废粉收集仓中，感光鼓101表面经相应消电设备消除静电后恢复至无电无尘的备用状态。这样就完成了一个基本的成像工作流程。该流程反复循环运转的结果，就可以得到打印者所需要的图像。
对于上述处理盒100，不同的生产商会根据处理盒100各个构成部件的功能、使用寿命和构造特点等，结合自己的研发模式制作出集成度不同的产品。例如，把承担显影功能的显影辊105、承担调节碳粉层厚功能的出粉刀113和承担显影剂储藏、供应功能的粉仓等部件集成为独立的显影盒。这种类型的显影盒具有储藏粉末类显影剂并把显影剂输运到感光鼓101表面，使静电潜像得以显影的功效。感光鼓101则预先直接配置于激光打印机中，或者同其它部件例如充电辊102和废粉刮片110另行组配成电子照相成像单元之后再配置于激光打印机中。
前述激光打印机的工作过程，不论感光鼓101是预先配置于激光打印机中，还是同其它部件另行组配后再配置于激光打印机中，其可视图像的形成都有赖于感光鼓101的不断旋转。在这种工作方式下，感光鼓101的旋转有赖于激光打印机产生的旋转驱动力以及承担此驱动力传输任务的传动部件。
参见图2、3、4，感光鼓101的基本构成包括光敏部件114和传动部件115。光敏部件114一般采用铝材制备的空心圆筒即铝筒为基本构件。在铝筒的外圆柱面上涂覆有感光材料。在铝筒的轴向一端装设有传动部件115。传动部件115将激光打印机产生的旋转驱动力传递给感光鼓101，使感光鼓101产生旋转。
传动部件115的构造形态基本呈现为圆柱体。在该圆柱体的外圆柱面上设置有驱动齿轮116。驱动齿轮116可把传动部件115获得的旋转驱动力传递给显影辊105等部件（参阅图1）。为了从激光打印机获得旋转驱动力，在传动部件115沿自身轴向背对光敏部件114的一端设置有呈圆柱形的受力块117。受力块117的径向外端部设置有四个其分布对称于受力块117径向中心的豁口118。豁口118沿受力块117径向的外端和沿受力块117轴向背对光敏部件114的一侧都处于开放状态，便于激光打印机驱动头119上的驱动齿120能插入豁口118中，参见图6a、b，实现驱动齿120同豁口118之间的啮合，以获取激光打印机产生的旋转驱动力。
感光鼓101从激光打印机获得旋转驱动力，由于装配时感光鼓101是从自身径向上被推入激光打印机中，激光打印机驱动头119在感光鼓101进入激光打印机的过程中先是沿着感光鼓101轴向回退之后再回弹到驱动齿120插入豁口118的状态。此过程中，由于驱动齿120在受力块117径向上会相对于豁口118形成移动，导致驱动头119与受力块117两者的径向中心容易出现错位，以致感光鼓101被装配到激光打印机中之后四个驱动齿120对各自豁口118的外壁形成不对称和不均匀的压迫，损伤驱动齿120或者豁口118，影响感光鼓101同激光打印机之间的扭矩传输。
针对上述因驱动头和受力块对位不准导致感光鼓同激光打印机之间不能有效传输扭矩的问题，本发明目的在于提供一种激光打印机用的感光鼓。
为达至上述发明目的，本发明开发了一种具有针对性的激光打印机用感光鼓。它包括光敏部件和传动部件。传动部件被固定于光敏部件沿自身长度方向的一侧。传动部件沿光敏部件长度方向背对光敏部件的一端设置有呈圆柱形的受力块。受力块沿自身轴向背对光敏部件的外端壁上设置有沿自身轴向内凹的盲孔。盲孔在受力块轴向横截面上具有连续的孔壁。盲孔的数量为四个。在受力块轴向横截面上，四个盲孔相对于受力块的径向中心呈对称分布。
前述感光鼓，在其受力块轴向横截面上，相对于盲孔沿受力块径向邻近受力块径向中心的部位，盲孔沿受力块径向邻近受力块外圆柱壁的部位沿着受力块的圆周方向朝着盲孔外部膨出。在受力块轴向横截面上，相对于盲孔沿受力块径向邻近受力块径向中心的部位，盲孔介于受力块径向上的中段沿着受力块的圆周方向朝着盲孔内部收窄。
本发明的感光鼓可以有效地克服驱动头和受力块对位不准的现象，以便稳定地从激光打印机获取所需的旋转驱动力，进而避免激光打印机驱动头以及感光鼓的传动部件在装配和传输扭矩时受到损伤，以能保证感光鼓同激光打印机之间能够有效地传输扭矩，更为有效地把驱动齿传来的扭矩传递给受力块。
图1现有激光打印机工作过程示意图；
图2现有激光打印机用感光鼓透视图一；
图3现有激光打印机用感光鼓透视图二；
图4现有激光打印机用感光鼓透视图三；
图5本发明激光打印机用感光鼓透视图；
图6a、b现有激光打印机驱动头透视图一、二；
图7本发明感光鼓同现有激光打印机驱动头对接过程透视图。
下面结合附图详细描述本发明感光鼓。
参见图5、7，分别从不同透视角度示出了本发明感光鼓及其同现有激光打印机驱动头对接的透视图。
本发明激光打印机用感光鼓的主要构造方式与相近领域的现有技术基本相同，本领域技术人员可参阅相近领域现有技术的相关技术资料并结合说明书背景技术部分的介绍以获知本发明激光打印机用感光鼓的基本构造状况。鉴于此，在本发明激光打印机用感光鼓具体实施方式的描述中所涉构件的附图标记将继续沿用本发明说明书背景技术部分相同构件的附图标记。另外，根据本发明针对现有感光鼓同激光打印机之间不能有效传输扭矩的问题，提出适宜的解决方案的初衷，申请人将就本发明激光打印机用感光鼓涉及其保证感光鼓获得稳定旋转驱动力的构造部分进行重点描述。
参见图5，感光鼓101的构成包括光敏部件114和传动部件115。
光敏部件114是采用铝材制备的空心圆筒，即以铝筒作为其基本构件。在铝筒的外圆柱面上涂覆有光敏材料制备的感光层。
传动部件115是感光鼓101的构成部件，其构造形态基本呈现为圆柱体，它固定地插接于铝筒轴向一端的内腔中。在传动部件115的外圆柱面上设置有驱动齿轮116。驱动齿轮116可把传动部件115获得的旋转驱动力传递给显影辊105等部件（参阅图1）。在传动部件115沿自身轴向背对光敏部件114的一端设置有其外观呈圆柱形的受力块117。受力块117的中轴线与传动部件115的中轴线重合。
在受力块117沿自身轴向背对光敏部件114的外端壁117-1上，设置有沿受力块117轴向内凹的盲孔121。盲孔121在受力块117轴向上并不贯通受力块117，它仅沿着受力块117的轴向自外端壁117-1伸入到受力块117的内部。在垂直于受力块117轴向的横截面上，围成盲孔121的孔壁处于不间断持续连接的状态。在垂直于受力块117轴向的横截面上，相对于盲孔121沿受力块117径向邻近受力块117径向中心的部位，盲孔121沿受力块117径向邻近受力块117外圆柱壁的部位沿着受力块117的圆周方向朝着盲孔121的外部膨出，形成两个膨出口122。在垂直于受力块117轴向的横截面上，相对于盲孔121沿受力块117径向邻近受力块117径向中心的部位，盲孔121介于受力块117径向上的中段沿着受力块117的圆周方向朝着盲孔121的内部收窄，形成颈部123。盲孔121的数量为四个。在垂直于受力块117轴向的横截面上，四个盲孔121相对于受力块117的径向中心呈对称分布。
参见图7，并结合图5、6a、6b，在把感光鼓101装配到激光打印机中时，激光打印机驱动头119上的四个驱动齿120将分别插入与其对应的盲孔121中。在驱动齿120插入盲孔121的过程中，由于盲孔121在传动部件115径向上背对传动部件115径向中心的外壁的限制，四个驱动齿120插入盲孔121之后不会在传动部件115的径向上形成移动，从而保证激光打印机驱动头119与感光鼓受力块117的径向中心处于同一轴线上。
此外，在盲孔121中设置颈部123之后，颈部123在受力块117圆周方向上的宽度变窄。在此构造形态下，在驱动齿120插入盲孔121后，驱动齿120在受力块117圆周方向上的移动空间就被直接限制于颈部123的两壁之间，进而减小了驱动齿120在受力块117圆周方向上同颈部123的两壁之一形成接触之前的游动间隙，从而保证在驱动齿120插入盲孔121后由于驱动头119受激光打印机的推动而带动驱动齿120迅速形成其与颈部123的两壁之一的接触，将激光打印机产生的旋转驱动力有效传递给受力块117，促使感光鼓101旋转。
针对现有感光鼓因其受力块同激光打印机驱动头对位不准导致感光鼓同激光打印机之间不能有效传输扭矩的问题，本发明在感光鼓传动部件的受力块外端壁上设置了内凹的盲孔。在这种构造方式下，激光打印机驱动头上的驱动齿在同盲孔啮合时，在感光鼓传动部件的横向或径向上，驱动齿的位置将受到盲孔的相同方向外壁的限制，使驱动齿准确插入盲孔中，避免激光打印机驱动头与受力块的径向中心出现相互错位，保证激光打印机驱动头与受力块的径向中心处于同一轴线上，进而保证感光鼓同激光打印机之间能够有效地传输扭矩。并且，盲孔介于受力块径向上的中段被设置成沿着受力块的圆周方向朝着盲孔的内部收窄的构造形态，结果导致盲孔介于受力块径向上的中段在受力块圆周方向上的宽度变窄，如此，当激光打印机驱动头上的驱动齿在插入盲孔后，驱动齿在受力块圆周方向上的移动空间就被直接限制于盲孔变窄的两壁之间，这就减小了驱动齿在受力块圆周方向上同盲孔壁形成接触之前的游动间隙，进而在驱动齿插入盲孔后就可以迅速形成驱动齿与盲孔壁之间的接触，从而更为有效地把驱动齿传来的扭矩传递给受力块。

Claims (2)

  1. 激光打印机用感光鼓，包括光敏部件和传动部件，所述传动部件被固定于所述光敏部件沿自身长度方向的一侧，所述传动部件沿所述光敏部件长度方向背对所述光敏部件的一端设置有呈圆柱形的受力块，其特征在于，所述受力块沿自身轴向背对所述光敏部件的外端壁上设置有沿自身轴向内凹的盲孔，所述盲孔在所述受力块轴向横截面上具有连续的孔壁，所述盲孔的数量为四个，在所述受力块轴向横截面上四个所述盲孔相对于所述受力块的径向中心呈对称分布。
  2. 根据权利要求1所述感光鼓，其特征在于，在所述受力块轴向横截面上，所述盲孔沿所述受力块径向邻近所述受力块外圆柱壁的部位相对于所述盲孔沿所述受力块径向邻近所述受力块径向中心的部位沿着所述受力块的圆周方向朝着所述盲孔外部膨出，所述盲孔介于所述受力块径向上的中段相对于所述盲孔沿所述受力块径向邻近所述受力块径向中心的部位沿着所述受力块的圆周方向朝着所述盲孔内部收窄。
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