Image holder unit and image forming apparatus

Abstract

The invention discloses an image holding body unit and an image forming apparatus. The image holding body unit includes: an image holding body that holds an image on a surface; a conduction member that ensures conduction of the image holding body through a contact with the image holding body; and a shape part which enables the contact to be visually recognized.

Description

Technical Field

[0001] The present disclosure relates to an image holding unit and an image forming apparatus. Background Art

[0002] For example, Japanese Patent Gazette No. 2008-57616 discloses a structure as follows, which is a rotating shaft support device, comprising a substantially hollow cylindrical bearing component that rotatably supports the rotating shaft and a retaining component that mounts and fixes the bearing component. The rotating shaft support device is characterized in that a bearing break portion formed by cutting off a portion of the bearing component is provided on the bearing component, the rotating shaft passes through the bearing break portion and is mounted in the bearing component, and a bearing fitting portion formed by cutting off a portion of the retaining component is provided on the retaining component, and the bearing component on which the rotating shaft is mounted is clamped in the bearing fitting portion. Summary of the invention

[0003] Here, in the manufacturing process of the image holder unit in which the image holder holding the image on the surface is rotatably accommodated in the accommodation member by the support member, it is necessary to confirm whether the conductive member for making the image holder conductive contacts the image holder. In the case where the conductive member cannot be confirmed by the conductive inspection after assembly, in order to identify the cause, it is necessary to disassemble and confirm the presence or absence of the contact point between the conductive member and the image holder, etc., which reduces the workability. On the other hand, if the contact point can be confirmed during the assembly process, the case where the conductive member cannot be confirmed in the conductive inspection is reduced, and the reduction of the workability of the manufacturing process can be suppressed.

[0004] An object of the present invention is to facilitate the confirmation of contact points, compared with a structure in which the confirmation of contact points cannot be performed in an assembled state.

[0005] According to a first aspect of the present invention, there is provided an image holding unit comprising:

[0006] An image holder that holds an image on a surface; a conductive member that ensures conduction of the image holder through a contact point with the image holder; and a shape portion that enables the contact point to be visually recognized.

[0007] According to a second aspect of the present invention, in the image holder unit according to the first aspect, the shape portion is located in the same direction as a storage direction in which the image holder is stored in a storage member that stores the image holder.

[0008] According to a third aspect of the present invention, in the image holder unit according to the second aspect, a member for positioning a support member that supports the image holder relative to the storage member is notched at a position determined with respect to the storage direction.

[0009] According to a fourth aspect of the present invention, in the image holding body unit according to any one of the first to third aspects, the shape portion is notched in the direction of the rotation axis of the image holding body to the position of the contact point.

[0010] According to a fifth aspect of the present invention, in the image holding body unit based on any one of the first to fourth aspects, when the conductive component is pulled out from the image forming device on which the image holding body unit is installed, the conduction of the image holding body is cut off before the shape portion is exposed from the image forming device.

[0011] According to a sixth aspect of the present invention, there is provided an image forming device comprising: an image forming unit, which forms an image; and an image retaining body unit, which constitutes a part of the image forming unit and is pluggable relative to a device body having the image forming unit, and the image retaining body unit comprises: an image retaining body, which retains an image on a surface; a conductive component, which ensures conductivity of the image retaining body through a contact point with the image retaining body; and a shape portion, which enables the contact point to be visually identified.

[0012] (Effect)

[0013] According to the first aspect, the contact points can be easily checked compared to a structure in which the contact points cannot be checked in an assembled state.

[0014] According to the second aspect, the shape portion is located in the same direction as the storage direction of the image holder in the storage member for storing the image holder, and the work of checking the contact point in the assembly stage can be performed more easily than in a case without this structure.

[0015] According to the third aspect, the support member for positioning the image holder relative to the housing member is notched at a position determined with respect to the housing direction, thereby improving the assembly workability of the photosensitive drum 11 compared to a case without such a structure.

[0016] According to the fourth aspect, the shape portion is notched toward the direction of the rotation axis of the image holding member up to the position of the contact point, and the visibility when checking the contact point can be improved compared to a case without such a structure.

[0017] According to the fifth aspect, when the conductive component is pulled out from the image forming device on which the image holding body unit is installed, the conduction of the image holding body is cut off before the shape portion is exposed from the image forming device, thereby improving the safety when the image holding body unit is pulled out from the image forming device compared to a case where this structure is not provided.

[0018] According to the sixth aspect, compared with a structure in which the contact point cannot be checked in the assembled state, the contact point can be checked easily. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of an image forming apparatus to which this embodiment is applied.

[0020] Figure 2 This is a diagram for explaining the structure of the photoconductor unit.

[0021] Figure 3 It is a perspective view showing a photosensitive body unit.

[0022] Figure 4 This is an exploded perspective view for explaining the assembly procedure of the photosensitive body unit.

[0023] Figure 5 It is a perspective view showing the assembled state of the photoconductor unit.

[0024] Figure 6 It is a perspective view showing the assembled state of the photoconductor unit.

[0025] Figure 7 It is a perspective view showing the assembled state of the photoconductor unit.

[0026] Figure 8 It is a perspective view for explaining access to the contact points in the photoreceptor unit in an assembled state.

[0027] Fig. 9 This is a diagram for explaining the switching of the GND conduction from ON to OFF when the photosensitive body unit is pulled out from the main body of the image forming apparatus. Fig. 9 (a) shows a state where the photosensitive body unit is accommodated in the main body. Fig. 9 (b) shows a state where the photosensitive body unit is pulled out from the main body to a position where the notch is not exposed. DETAILED DESCRIPTION

[0028] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the size, thickness, etc. of each part in the drawings referred to in the following description may be different from the actual size.

[0029] <Image Forming Apparatus 100 >

[0030] Figure 1 1 is a schematic diagram showing the structure of an image forming apparatus 100 to which the present embodiment is applied.

[0031] like Figure 1 As shown in FIG. 1 , the image forming apparatus 100 includes: a document reading device 1 for reading information of a document G; an image forming unit 2 for forming an image on a recording paper S based on the information of the document read by the document reading device 1 (read image); and a paper feeding unit 3 for feeding the recording paper S fed to the image forming unit 2. In the image forming apparatus 100, the image forming unit 2 and the paper feeding unit 3 are housed inside a main body 101, and the document reading device 1 is disposed above the main body 101. The main body 101 has a discharge storage unit 102 on its upper surface for discharging and storing the recording paper S on which an image is formed.

[0032] The document reading device 1 has a housing 103. In addition, the document reading device 1 has a light-transmitting document table 105 on which a document G is placed, and a document cover 106 that covers the document table 105 and can be opened and closed relative to the housing 103, on the upper surface of the housing 103. The document cover 106 is provided with: an automatic document conveying unit 107 that conveys the document G to a reading position and discharges the read document G; a document tray 108 that loads the document G conveyed by the automatic document conveying unit 107; and a storage unit 109 that stores the document G discharged from the automatic document conveying unit 107.

[0033] The image forming section 2, for example in an electronic photography method, comprises: an image forming unit 20 that forms colorant images of yellow (Y), magenta (M), cyan (C), and black (K); an intermediate transfer unit 26 that conveys the colorant image formed by the image forming unit 20 until it is transferred to a recording paper S; and a fixing unit 27 that fixes the colorant image transferred from the intermediate transfer unit 26 to the recording paper S.

[0034] The image forming unit 20 includes a photosensitive body unit 4 indicated by a dotted line corresponding to each color. Each of the photosensitive body units 4 is attachable to and detachable from the main body 101 , and a user can perform an attaching and detaching operation of the photosensitive body unit 4 .

[0035] The paper feed section 3 includes a draw-out storage body 31 capable of loading a plurality of recording papers S of a predetermined size, type, etc., and a delivery device 32 for delivering the recording papers S stored in the storage body 31 one by one to a delivery path. Between the paper feed section 3 and the image forming section 2, a supply delivery path 28 is provided for delivering the recording papers S delivered from the paper feed section 3 to a secondary transfer position.

[0036] Next, the basic operation of image forming apparatus 100 will be described.

[0037] First, in the document reading device 1, the user places the document G on either the document table 105 or the document tray 108. Then, when the user operates an operation button (not shown) or the like to receive an instruction to read the document, the reading operation of the document G starts. That is, the document reading device 1 obtains the read information of the document G. Then, the image forming unit 2 performs an image forming operation based on the read information of the document G received from the document reading device 1. At this time, in coordination with the operation of the image forming unit 2, the recording paper S is fed out from the paper feeding unit 3. And, after the toner image is fixed on the recording paper S by the image forming unit 2, it is discharged to the discharge storage unit 102. The above image forming operation is repeated in the same manner as the number of sheets of the document G and the number of sheets of image formation.

[0038] Next, refer to Figure 2 The image forming unit 20 to which the present embodiment is applied will be described. More specifically, the photosensitive body unit 4 constituting a part of the image forming unit 20 will be described. The photosensitive body unit 4 is an example of an image holding body unit.

[0039] Figure 2 This is a diagram for explaining the structure of the photoconductor unit 4 , and is a diagram when the image forming apparatus 100 is viewed from the front side.

[0040] like Figure 2 As shown in the figure, the photosensitive drum 11 that rotates in the direction indicated by the arrow is provided in the photosensitive unit 4. In addition, the photosensitive unit 4 includes a charging roller 12, an exposure device 13, a developing device 14, a transfer roller 15, and a cleaning device 16 as components arranged around the photosensitive drum 11. In addition, the photosensitive unit 4 may have a structure other than a structure including all these components or a structure without some of them.

[0041] The photosensitive drum 11 is composed of a cylindrical body, and a photosensitive layer (not shown) is formed on the surface of the cylindrical body.

[0042] The charging roller 12 is composed of a conductive rubber roller or the like, and charges the photosensitive drum 11 .

[0043] The exposure device 13 irradiates the photosensitive drum 11 charged by the charging roller 12 with light from a light source such as a laser light source or an LED (Light Emitting Diode), and forms an electrostatic latent image on the surface of the photosensitive drum 11 .

[0044] The developing device 14 causes toner to adhere to the surface of the photosensitive drum 11, and develops the electrostatic latent image formed on the photosensitive drum 11 with toner of a predetermined color. Thus, a toner image is formed on the surface of the photosensitive drum 11 in the present embodiment.

[0045] The developer is stored in the developing device 14. The developer of the present embodiment is composed of a magnetic carrier and a colored toner, and is a so-called two-component developer.

[0046] Furthermore, in the present embodiment, a developer container 19 is provided that contains a developer to be supplied to the developing device 14. In the present embodiment, new developer is supplied from the developer container 19 to the developing device 14 through a developer conveying path (not shown).

[0047] The transfer roller 15 is composed of a conductive rubber roller or the like.

[0048] In this embodiment, the area where the transfer roller 15 and the photosensitive drum 11 face each other is a transfer portion T. A transfer bias is applied to the transfer roller 15. The toner image on the surface of the photosensitive drum 11, that is, the toner image held by the photosensitive drum 11, is transferred to the belt of the intermediate transfer unit 26 at the transfer portion T.

[0049] The cleaning device 16 is provided with a contact member 16A arranged to be in contact with the photosensitive drum 11 , and the cleaning device 16 removes attached matter such as toner on the photosensitive drum 11 .

[0050] Next, the specific structure of the photoconductor unit 4 will be described.

[0051] Figure 3 It is a perspective view showing the photoconductor unit 4 .

[0052] Figure 3 The photosensitive body unit 4 shown includes a housing 41 , a bearing 42 , a conductive member 43 , and a cover 44 in addition to the above-mentioned photosensitive drum 11 .

[0053] The housing 41 is a component that constitutes the main body of the photosensitive body unit 4 and supports components such as the photosensitive drum 11. More specifically, the housing 41 includes support pieces 411 and 412 for supporting one end 111 and the other end 112 of the photosensitive drum 11. Figure 3 In the figure, one end portion 111 of the photosensitive drum 11 is located on the left side, and the other end portion 112 is located on the right side.

[0054] The bearing 42 is a resin component provided on the support pieces 411 and 412 of the housing 41. More specifically, the bearing 42 is composed of a bearing 421 corresponding to the support piece 411 and a bearing 422 corresponding to the support piece 412. The bearings 421 and 422 are different components.

[0055] That is, the bearing 421 is attached to the one end portion 111 of the photosensitive drum 11 via the support piece 411 , and the bearing 422 is attached to the other end portion 112 of the photosensitive drum 11 via the support piece 412 .

[0056] In this way, the one end portion 111 of the photoconductor drum 11 is rotatably supported by the supporting piece 411 via the bearing 421 , and the other end portion 112 is rotatably supported by the supporting piece 412 via the bearing 422 .

[0057] The bearing 421 is an example of a supporting member. In addition, the housing 41 is an example of a housing member and an example of a member for positioning.

[0058] The conductive member 43 is connected to the contact member 113 (see FIG. Figure 4 In this embodiment, the conductive member 43 is provided on the side of the one end portion 111 of the photosensitive drum 11 (see Figure 3 on the left side of the image).

[0059] To further explain, the conductive member 43 has a contact point 114 (see Figure 4 ) contacting the spring portion 431 (refer to Figure 7 ) and a mounting portion 432 mounted on the housing 41.

[0060] The cover 44 is a resin member that covers the spring portion 431 of the conductive member 43. The cover 44 is provided on the support piece 411 side of the housing 41 on which the conductive member 43 is provided, but may be provided on the support piece 412 side.

[0061] Next, use Figures 4 to 7 The structure of the photoconductor unit 4 according to the present embodiment will be described.

[0062] Figure 4 This is an exploded perspective view for explaining the assembly procedure of the photoconductor unit 4 , and shows the photoconductor drum 11 , the housing 41 , and the bearings 42 ( 421 , 422 ). Figures 5 to 7 It is a perspective view showing the assembled state of the photoconductor unit.

[0063] like Figure 4 As shown, the support pieces 411 and 412 of the housing 41 are located at the ends of the housing 41. Moreover, the support pieces 411 and 412 are annular portions with a notch in a portion. More specifically, a notch 413 is formed in the support piece 411, and a notch 414 is formed in the support piece 412. The position of the notch 413 of the support piece 411 and the position of the notch 414 of the support piece 412 are in the same direction as each other.

[0064] The opening length of the notches 413, 414 of the housing 41 is smaller than the diameter of the photosensitive drum 11. The supporting pieces 411, 412 have inner circumferential surfaces corresponding to the outer diameters of the bearings 421, 422. The supporting pieces 411, 412 are deformable, and the circumferential length of the notches 413, 414 can be changed.

[0065] The photosensitive drum 11 is accommodated in the housing 41 from the lateral direction A by utilizing the notches 413 and 414 of the support pieces 411 and 412. That is, one end 111 of the photosensitive drum 11 is inserted into the support piece 411 through the notch 413 of the support piece 411, and the other end 112 is inserted into the support piece 412 through the notch 414 of the support piece 412. Thus, the workability of assembling the photosensitive drum 11 to the housing 41 is improved.

[0066] The lateral direction A mentioned here is an example of a storage direction. The storage direction refers to a direction in which the housing 41 storing the photosensitive drum 11 stores the photosensitive drum 11, and may also refer to an assembly direction of the photosensitive drum 11.

[0067] Here, as described above, the bearings 421 and 422 are components that support the photosensitive drum 11. The bearing 421 is positioned relative to the housing 41 in the circumferential direction by the support piece 411, and the bearing 422 is positioned relative to the housing 41 in the circumferential direction by the support piece 412. In other words, the housing 41 includes the support piece 411, which is a component that positions the bearing 421 relative to the housing 41, and the support piece 412, which is a component that positions the bearing 422 relative to the housing 41.

[0068] Furthermore, the support piece 411 is provided with a notch 413, and the support piece 412 is provided with a notch 414. The notches 413 and 414 are provided at the same position with respect to the lateral direction A.

[0069] Thus, the support piece 411 is an example of a member that positions the bearing 421 relative to the housing 41. The member mentioned here includes, for example, a case where the support piece 411 and the housing 41 are separate members and the support piece 411 is attached to the housing 41, or a case where the support piece 411 and the housing 41 are integrally formed.

[0070] When focusing on the support piece 411 of the housing 41 in this state, the inner diameter of the support piece 411 and the outer diameter of the end portion 111 of the photosensitive drum 11 are not of corresponding sizes. More specifically, the outer diameter of the end portion 111 of the photosensitive drum 11 is smaller than the inner diameter of the support piece 411. Figure 5 As shown, the outer peripheral surface of the one end portion 111 is not in close contact with the inner peripheral surface of the support piece 411 , but a gap G1 is formed between the support piece 411 and the one end portion 111 along the circumferential direction.

[0071] Similarly, in the supporting piece 412 of the housing 41, the outer diameter of the other end portion 112 of the photosensitive drum 11 is smaller than the inner diameter of the supporting piece 412. Figure 5 As shown, a gap G2 is formed between the support piece 412 and the other end portion 112 along the circumferential direction.

[0072] return Figure 4The bearing 421 is attached to the one end 111 of the photosensitive drum 11 accommodated in the housing 41 from the axial direction B1. Similarly, the bearing 422 is attached to the other end 112 of the photosensitive drum 11 accommodated in the housing 41 from the axial direction B2.

[0073] In this way, when the photosensitive drum 11 and the bearings 421 and 422 are stored in the housing 41, Figure 6 As shown, the photosensitive drum 11 is rotatably held via bearings 421 and 422 .

[0074] Reference Figure 6 , the contact member 113 of the photosensitive drum 11 is exposed. As described above, the contact member 113 is a member for GND (ground) conduction, and is connected to the conduction member 43 (refer to Figure 3 )connect.

[0075] In addition, the contact member 113 is removed from the photosensitive drum 11 before the bearing 421 is mounted on the one end portion 111 of the photosensitive drum 11, and after the bearing 421 is mounted on the one end portion 111 from the axial direction B1, the contact member 113 is inserted through the through hole 424 (see FIG. Figure 4 ) is installed on one end portion 111 of the photosensitive drum 11.

[0076] Here, if Figure 4 As shown in FIG. 1 , a notch 423 is formed in the bearing 421. The notch 423 is formed so as to reduce the thickness in the same direction as the axial direction B1 shown in the figure.

[0077] To further explain, the notch 423 is formed in a manner extending radially from the through hole 424. Figure 6 As shown, the position of the notch 423 on the bearing 421 is in the same direction as the notch 413 of the support sheet 411 .

[0078] More specifically, when the bearing 421 is positioned relative to the housing 41 , the position of the notch 423 in the circumferential direction is substantially the same as the notch 413 of the support piece 411 .

[0079] The same direction mentioned here is not necessarily completely the same, and there may be a degree of mismatch that does not impair workability when the contact point 114 is visually recognized and confirmed through the notch 423 during the assembly stage. The notch 423 of the bearing 421 is an example of a shape portion.

[0080] like Figure 7 As shown, the conductive member 43 is mounted so that the spring portion 431 contacts the contact point 114 of the contact point member 113 when the photosensitive drum 11 and the bearings 421 and 422 are accommodated in the housing 41. The mounting portion 432 of the conductive member 43 is mounted to the housing 41.

[0081] The photosensitive drum 11 and the contact member 113 are examples of an image holding member.

[0082] exist Figure 7 In the state shown, by installing the cover 44, it becomes Figure 3 The photosensitive body unit 4 is shown in the assembled state. Figure 8 Access to the contact point 114 in the photoconductor unit 4 will be described.

[0083] Figure 8 1 is a perspective view for explaining access to the contact point 114 in the photoconductor unit 4 in the assembled state.

[0084] like Figure 8 As shown, in the assembled photoconductor unit 4 , the contact state between the spring portion 431 and the contact point 114 can be visually recognized through the notch 423 of the bearing 421 .

[0085] To further explain, in the assembly operation of the photosensitive body unit 4, the notch 423 of the bearing 421 is formed in the same direction as the notch 413 of the housing 41. In other words, the notch 423 of the bearing 421 is located in the lateral direction A (refer to Figure 4 ) in the same direction.

[0086] Therefore, during the assembly of the photosensitive body unit 4, the contact points can be visually checked without changing the posture of the housing 41, etc. That is, during the assembly of the photosensitive body unit 4, the contact points can be visually checked.

[0087] In this way, the assembly direction of the photosensitive drum 11 with respect to the housing 41 and the direction in which the notch 423 of the bearing 421 is located coincide with each other, thereby enabling assembly and visual confirmation to be performed simultaneously.

[0088] In addition, the notch 423 of the bearing 421 is used to allow the contact point 114 (see Figure 4 ) can be formed in a manner that can be visually recognized, but in this embodiment, the notch 423 is cut to the contact point 114 (refer to Figure 4 ). Therefore, compared with the case where the contact point 114 is not cut, it becomes easier to detect the wrong assembly by visual inspection.

[0089] In addition, in this embodiment, if Figure 8 As shown, the notch 413 of the housing 41 and the notch 423 of the bearing 421 are in the lateral direction A (refer to Figure 4 ), but not limited thereto. For example, the notch 413 of the housing 41 and the notch 423 of the bearing 421 may be formed in different directions, for example, in a manner of being offset within 90 degrees. In this case, visual confirmation of the contact point can also be performed during the assembly operation.

[0090] Fig. 9 1 is a diagram for explaining the switching of the GND (ground) conduction from ON to OFF when the photosensitive body unit 4 is pulled out from the main body 101 of the image forming apparatus 100. Fig. 9 (a) shows a state where the photosensitive body unit 4 is accommodated in the main body 101. Fig. 9 (b) shows a state where the photoconductor unit 4 is pulled out to a position where the cutout 423 is not exposed from the main body 101 .

[0091] like Fig. 9 As shown in (a), when the photosensitive body unit 4 is stored in the main body 101, the GND conduction is ON. On the other hand, as shown in (b), when the photosensitive body unit 4 is pulled out from the main body 101, the GND conduction is cut off and turned OFF, and the notch 423 is exposed by the subsequent pulling out.

[0092] Thus, in this embodiment, when the photosensitive body unit 4 is pulled out from the main body 101, the GND conduction is turned off before the notch 423 is exposed. Therefore, even if the user who pulls out the photosensitive body unit 4 touches the spring portion 431 from the notch 423 (see Figure 7 ) has no effect.

[0093] Such GND conduction ON / OFF switching may be realized by a structure that performs ON / OFF switching mechanically according to the position of the photosensitive body unit 4 , or may be realized by a structure that performs ON / OFF switching of the GND conduction by control corresponding to the detection result of a position sensor.

[0094] Incidentally, the switching of the GND conduction from OFF to ON when the photosensitive body unit 4 is mounted on the main body 101 of the image forming apparatus 100 is performed when the main body 101 is inserted to a position where the notch 423 is not exposed (see Fig. 9 (b) is carried out.

[0095] <Note>

[0096] (((1)))An image holding unit comprising:

[0097] an image holder that holds the image on the surface;

[0098] a conductive member that ensures conduction of the image holding member through a contact point with the image holding member; and

[0099] A shape portion enables the contact point to be visually recognized.

[0100] (((2)))The image holding body unit according to (((1))), characterized in that:

[0101] The shape portion is located in the same direction as a storage direction in which the image holder is stored in a storage member that stores the image holder.

[0102] (((3)))The image holding body unit according to (((2))), characterized in that:

[0103] A member for positioning a supporting member that supports the image holding member relative to the housing member is provided with a notch at a position determined with respect to the housing direction.

[0104] (((4))) The image holding body unit according to any one of (((1))) to (((3))), characterized in that:

[0105] The shape portion is cut out in the direction of the rotation axis of the image holding body to the position of the contact point.

[0106] (((5))) The image holding body unit according to any one of (((1))) to (((4))), characterized in that:

[0107] When the conductive member is pulled out from the image forming apparatus to which the image holding body unit is mounted, the conduction of the image holding body is cut off before the shape portion is exposed from the image forming apparatus.

[0108] (((6)))An image forming apparatus comprising:

[0109] an image forming unit that forms an image;

[0110] an image holding body unit, the image holding body unit constituting a part of the image forming unit and being pluggable and removable relative to a device main body having the image forming unit,

[0111] The image holding unit comprises:

[0112] an image holder that holds the image on the surface;

[0113] a conductive member that ensures conduction of the image holding member through a contact point with the image holding member; and

[0114] A shape portion enables the contact point to be visually recognized.

[0115] According to (((1))), the contact points can be easily checked compared to a structure in which the contact points cannot be checked in an assembled state.

[0116] According to (((2))), the shape portion is located in the same direction as the storage direction of the image holder in the storage member that stores the image holder, and the work of checking the contact points in the assembly stage can be easily performed compared to a case without this structure.

[0117] According to (((3))), the support member for positioning the image holder relative to the housing member is notched at a position determined with respect to the housing direction, and thus the assembly workability of the photosensitive drum 11 can be improved compared with a case without such a structure.

[0118] According to (((4))), the shape portion is notched toward the direction of the rotation axis of the image holding member up to the position of the contact point, and the visibility when checking the contact point can be improved compared to a case where this structure is not provided.

[0119] According to (((5))), when the conductive component is pulled out from an image forming device on which an image retaining body unit is installed, the conduction of the image retaining body is cut off before the shape portion is exposed from the image forming device, thereby improving the safety when the image retaining body unit is pulled out from the image forming device, compared with a case where this structure is not provided.

[0120] According to (((6))), the contact points can be easily checked compared to a structure in which the contact points cannot be checked in an assembled state.

Claims

1. An image holding unit, characterized in that: have: an image holder that holds the image on the surface; a conductive member that ensures conduction of the image holding member through a contact point with the image holding member; and A shape portion enables the contact point to be visually recognized.

2. The image holding body unit according to claim 1, wherein: The shape portion is located in the same direction as a storage direction in which the image holder is stored in a storage member that stores the image holder.

3. The image holding body unit according to claim 2, wherein: A member for positioning a supporting member that supports the image holding member relative to the housing member is provided with a notch at a position determined with respect to the housing direction.

4. The image holding body unit according to any one of claims 1 to 3, wherein: The shape portion is cut out in the direction of the rotation axis of the image holding body to the position of the contact point.

5. The image holding body unit according to any one of claims 1 to 4, wherein: When the conductive member is pulled out from the image forming apparatus to which the image holding body unit is mounted, the conduction of the image holding body is cut off before the shape portion is exposed from the image forming apparatus.

6. An image forming device, characterized in that: have: an image forming section that forms an image; and an image holding body unit, the image holding body unit constituting a part of the image forming unit and being pluggable and removable relative to a device main body having the image forming unit, The image holding unit comprises: an image holder that holds the image on the surface; a conductive component, the conductive component ensuring conduction of the image holding body through a contact point with the image holding body; as well as A shape portion enables the contact point to be visually recognized.

Images