Drum cartridges and process cartridges

Abstract

The electrical contact surface of the storage medium is disposed on the outer surface of the drum frame, and a structure is provided in which the electrical contact surface can contact an electrical terminal of the image forming device even when the developing cartridge is attached. [Solution] This drum cartridge has a drum frame 21 to which a developer cartridge can be attached, a photosensitive drum, and a first storage medium 29. The developer cartridge can be attached to the drum frame 21. The photosensitive drum is located at one end 211 of the drum cartridge in the first direction. The first storage medium 29 has a first electrical contact surface. The first electrical contact surface is located on the exposed outer surface of the drum frame 21 when the developer cartridge is attached to the drum frame 21. Therefore, even when the developer cartridge is attached, the first electrical contact surface can be brought into contact with an electrical terminal of the image forming device.

Description

[Technical Field]

[0001] The present invention relates to a drum cartridge and a process cartridge. [Background technology]

[0002] Conventionally, there are known process cartridges that can be attached to and detached from electrophotographic image forming apparatuses such as laser printers and LED printers. The process cartridge has a developer cartridge and a drum cartridge. The developer cartridge has a developer roller. The drum cartridge has a photosensitive drum. When the developer cartridge is attached to the drum cartridge, the surface of the photosensitive drum faces the surface of the developer roller.

[0003] A process cartridge having a developing cartridge and a drum cartridge is described in, for example, Patent Document 1. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-249802 Summary of the Invention [Problem to be solved by the invention]

[0005] Conventionally, developer cartridges having a storage medium have been known. The storage medium is, for example, an IC chip. Various pieces of information related to the developer cartridge are stored in the storage medium. In recent years, image forming devices have come to handle a large amount of information not only about the developer cartridge but also about the drum cartridge. For this reason, there is a demand for the drum cartridge to be equipped with a storage medium. However, when the developer cartridge is attached to the frame (drum frame) of the drum cartridge, part of the outer surface of the drum frame is covered by the developer cartridge.

[0006] The object of the present invention is to provide a structure in which the electrical contact surface of the storage medium is arranged on the outer surface of the drum frame, and the electrical contact surface can contact the electrical terminal of the image forming device even when the developing cartridge is installed. [Means for solving the problem]

[0007] In order to solve the above problem, the first invention of the present application is a drum cartridge comprising: a drum frame into which a developing cartridge can be attached, the drum frame including one end in a first direction and another end spaced apart from the one end in the first direction; a photosensitive drum rotatable about a first axis extending in a second direction, the photosensitive drum located at the one end; and a first storage medium including a first electrical contact surface located on the exposed outer surface of the drum frame when the developing cartridge is attached to the drum frame.

[0008] The second invention of the present application is a process cartridge comprising: a drum cartridge having a drum frame including one end in a first direction and another end remote from the one end in the first direction; a photosensitive drum rotatable about a first axis extending in a second direction, the photosensitive drum located at the one end of the drum frame; and a first storage medium including a first electrical contact surface; and a developer cartridge attachable to the drum frame, the developer cartridge comprising: a casing capable of storing toner, the casing including one end in the first direction and another end remote from the one end in the first direction; a developing roller rotatable about a second axis extending in the second direction, the developing roller located at the one end of the casing; and a second storage medium including a second electrical contact surface located on the outer surface of the casing, wherein the first storage medium is located on the exposed outer surface of the drum frame when the developer cartridge is attached to the drum frame. [Effects of the Invention]

[0009] According to the first and second inventions of the present application, an electrical contact surface is arranged on the outer surface of the drum frame, and the electrical contact surface can be brought into contact with an electrical terminal of the image forming device even when a developing cartridge is attached. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 2 is a perspective view of the process cartridge. [Figure 2] FIG. 2 is a perspective view of the drum cartridge. [Figure 3] FIG. 2 is a perspective view of the drum cartridge. [Figure 4] FIG. 2 is an exploded perspective view of the drum cartridge. [Figure 5] FIG. 1 is an external view of an IC chip. [Figure 6] FIG. 2 is a plan view of the process cartridge as viewed from the drum bottom plate side. [Figure 7] FIG. 2 is a plan view of the process cartridge as viewed from the opposite side to the drum bottom plate. [Figure 8] FIG. 2 is a plan view of the process cartridge as viewed from the first connecting plate side (one end side in the first direction). [Figure 9] FIG. 10 is a plan view of the process cartridge as viewed from the second connecting plate side (the other end side in the first direction). [Figure 10] FIG. 10 is a plan view of the process cartridge as viewed from the first drum side plate side (one side in the second direction). [Figure 11] FIG. 10 is a plan view of the process cartridge as viewed from the second drum side plate side (the other side in the second direction). [Figure 12] FIG. [Figure 13] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0012] In the following description, the direction in which the handle of the drum cartridge and the photosensitive drum are aligned will be referred to as the "first direction." The direction in which the rotation axis of the photosensitive drum extends will be referred to as the "second direction." The direction intersecting with the drum bottom plate of the drum cartridge will be referred to as the "third direction." In the following embodiments, the first direction and the second direction intersect (preferably perpendicular), the second direction and the third direction intersect (preferably perpendicular), and the third direction intersect (preferably perpendicular) with the first direction.

[0013] <1. About the process cartridge> FIG. 1 is a perspective view of a developer cartridge 1 mounted in a drum cartridge 2. Hereinafter, the cartridge in which the developer cartridge 11 is mounted in the drum cartridge 2 will be referred to as a process cartridge 100. The process cartridge 100 is a replaceable unit used in an electrophotographic image forming apparatus. Examples of electrophotographic image forming apparatuses include laser printers and LED printers. The image forming apparatus has a frame that holds the process cartridge 100. The process cartridge 100 is detachably attached to the frame of the image forming apparatus. Note that a process cartridge 100 is provided for each color of toner. For example, an image forming apparatus that uses four colors of toner has four process cartridges 100 attached to it.

[0014] As shown in FIG. 1, the process cartridge 100 has a developer cartridge 1 and a drum cartridge 2. The developer cartridge 1 is detachable from the drum cartridge 2. Therefore, it is possible to replace only one of the developer cartridge 1 and the drum cartridge 2 with a new one. This allows the user of the image forming device to effectively utilize the lifespan of both the developer cartridge 1 and the drum cartridge 2.

[0015] <2. About the drum cartridge> <2-1. Drum cartridge configuration> 2 and 3 are perspective views of the drum cartridge 2. Fig. 4 is an exploded perspective view of the drum cartridge 2. The drum cartridge 2 transfers toner supplied from the developer cartridge 1 onto printing paper via a photosensitive drum 22. As shown in Figs. 2 to 4, the drum cartridge 2 of this embodiment has a drum frame 21, a photosensitive drum 22, a transfer roller 23, a transport roller 24, a gear unit 25, a charger 26, a first pressing member 27, and a second pressing member 28.

[0016] The drum frame 21 is a frame onto which the developing cartridge 1 can be attached. As shown in FIG. 4, the drum frame 21 of this embodiment is composed of two members: a frame main body 31 and a frame cover 32. The frame cover 32 is fixed to the frame main body 31. The photosensitive drum 22 and the transfer roller 23 are located between the frame main body 31 and the frame cover 32. However, the drum frame 21 may be composed of a single member, or may be composed of three or more members.

[0017] 2 and 3, the drum frame 21 has one end 211 in the first direction and another end 212 that is spaced apart from the one end in the first direction. The one end 211 is closer to the photosensitive drum 22 than the other end 212. The drum frame 21 has a recess 210 between the one end 211 and the other end 212, into which the developing cartridge 1 is inserted.

[0018] The drum frame 21 includes a first drum side plate 41 , a second drum side plate 42 , a first connecting plate 43 , a second connecting plate 44 , and a drum bottom plate 45 .

[0019] The first drum side plate 41 is located at one end of the drum frame 21 in the second direction. The first drum side plate 41 extends in the first and third directions. When the developer cartridge 1 is attached to the drum frame 21, the first drum side plate 41 covers a portion of a gear cover 152 of the developer cartridge 1, which will be described later. When the developer cartridge 1 is attached to the drum frame 21, the first drum side plate 41 and a first developer side plate 111 of the developer cartridge 1, which will be described later, face each other in the second direction. The first drum side plate 41 has a first guide groove 411. When the developer cartridge 1 is attached to the drum cartridge 2, one end of the developer roller shaft 132, which will be described later, in the second direction fits into the first guide groove 411.

[0020] The second drum side plate 42 is located at the other end of the drum frame 21 in the second direction. The second drum side plate 42 extends in the first and third directions. The first drum side plate 41 and the second drum side plate 42 are spaced apart in the second direction. The photosensitive drum 22 and the transfer roller 23 are located between the first drum side plate 41 and the second drum side plate 42. When the developer cartridge 1 is attached to the drum cartridge 2, the first drum side plate 41 covers a portion of the outer surface of a second developer side plate 112 of the casing 11 (described later). When the developer cartridge 1 is attached to the drum frame 21, the second drum side plate 42 and the second developer side plate 112 of the developer cartridge 1 face each other in the second direction. The second drum side plate 42 has a second guide groove 421. When the developer cartridge 1 is attached to the drum cartridge 2, the other end of the developer roller shaft 132 in the second direction fits into the second guide groove 421.

[0021] The first connecting plate 43 is located at one end 211 of the drum frame 21 in the first direction. The first connecting plate 43 extends in the second direction between one end of the first drum side plate 41 in the first direction and one end of the second drum side plate 42 in the first direction. The one end of the first drum side plate 41 in the first direction and the one end of the second drum side plate 42 in the first direction are connected by the first connecting plate 43. A portion of the outer surface of the photosensitive drum 22 is covered by the first connecting plate 43. In this embodiment, the first connecting plate 43 is formed by a portion of the frame main body 31 and a portion of the frame cover 32. However, the first connecting plate 43 may be formed as a single member.

[0022] The second connecting plate 44 is located at the other end 212 in the first direction of the drum frame 21. The second connecting plate 44 extends in the second direction between the other end in the first direction of the first drum side plate 41 and the other end in the first direction of the second drum side plate 42. The other end in the first direction of the first drum side plate 41 and the other end in the first direction of the second drum side plate 42 are connected by the second connecting plate 44. The photosensitive drum 22 and the transfer roller 23 are located between the first connecting plate 43 and the second connecting plate 44.

[0023] The second connecting plate 44 has a handle 441. That is, the drum frame 21 has the handle 441 on the outer surface of the other end 212 in the first direction. A user of the image forming apparatus holds this handle 441 when installing or removing the process cartridge 100 to or from the image forming apparatus.

[0024] The drum bottom plate 45 extends in the first and second directions between the first drum side plate 41, the second drum side plate 42, the first connecting plate 43, and the second connecting plate 44. The first drum side plate 41 and the second drum side plate 42 are connected by the drum bottom plate 45. The drum bottom plate 45 has a conveying opening 451 and a first opening 452.

[0025] The conveying opening 451 is an opening that penetrates the drum bottom plate 45 in the third direction. The conveying opening 451 is located between the transfer roller 23 and the conveying roller 24 in the first direction. The drum bottom plate 45 also has a plurality of guide ribs 453 that protrude toward the inside of the conveying opening 451. The printing paper conveyed by the conveying roller 24 is guided to the conveying opening 451 while coming into contact with the plurality of guide ribs 453. The printing paper that passes through the conveying opening 451 is then inserted between the photosensitive drum 22 and the transfer roller 23.

[0026] The first opening 452 is an opening that penetrates the drum bottom plate 45 in the third direction. The first opening 452 is located between the transport opening 451 and the first drum side plate 41. The transport opening 451 and the first opening 452 are adjacent to each other in the second direction. When the developer cartridge 1 is attached to the drum frame 21, an electrical contact surface 181 of an IC chip 18 mounted on the developer cartridge 1 (described later) is exposed from the first opening 452. Therefore, the electrical contact surface 181 can come into contact with an electrical terminal of the image forming device without being blocked by the drum bottom plate 45.

[0027] The drum bottom plate 45 also has a notch 454 that connects to the first opening 452. The notch 454 is recessed in a first direction from the first opening 452 toward a gear portion 25, which will be described later. When the developer cartridge 1 is attached to the drum cartridge 2, a protrusion 153 of a gear cover 152 of the developer cartridge 1, which will be described later, fits into the notch 454. This positions the electrical contact surface 181 relative to the first opening 452.

[0028] The photosensitive drum 22 is a drum that can rotate about a rotation axis (first axis) that extends in the second direction. The photosensitive drum 22 is located at one end 211 of the drum frame 21 in the first direction. The photosensitive drum 22 is also arranged along a first connecting plate 43. When the developer cartridge 1 is attached to the drum cartridge 2, the outer circumferential surface of the developing roller 13 (described later) and the outer circumferential surface of the photosensitive drum 22 come into contact with each other.

[0029] The photosensitive drum 22 of this embodiment has a drum main body 221 and a drum shaft 222. The drum main body 221 is a cylindrical member extending in the second direction. The outer peripheral surface of the drum main body 221 is covered with a photosensitive material. The drum shaft 222 is a columnar member extending in the second direction along the rotation axis of the photosensitive drum 22. The drum shaft 222 is inserted into a through-hole provided in the center of the drum main body 221. The drum main body 221 is fixed to the drum shaft 222 so as not to rotate relative to it.

[0030] One end of the drum shaft 222 in the second direction is fixed to a drum gear 251. The drum gear 251 belongs to a gear unit 25, which will be described later, and is rotatable about a first axis. Therefore, the drum shaft 222 and the drum main body 221 are rotated by being driven by the gear unit 25. Note that the drum shaft 222 does not have to penetrate the drum main body 221 in the second direction. For example, a pair of drum shafts 222 may extend in the second direction from both ends of the drum main body 221 in the second direction.

[0031] The drum shaft 222 is made of, for example, a conductive metal. The drum shaft 222 is connected to the ground terminal of the image forming apparatus, so that the drum shaft is maintained at a reference voltage.

[0032] The transfer roller 23 is a roller that can rotate about a rotation axis (transfer roller axis) that extends in the second direction. The transfer roller 23 is located at one end 211 of the drum frame 21 in the first direction. The transfer roller 23 is also arranged along the first connecting plate 43. The outer circumferential surface of the photosensitive drum 22 and the outer circumferential surface of the transfer roller 23 come into contact with each other. When the printing paper passes between the photosensitive drum 22 and the transfer roller 23, the transfer roller 23 presses the printing paper against the outer circumferential surface of the photosensitive drum 22. As a result, the toner adhering to the surface of the photosensitive drum 22 is transferred to the printing paper.

[0033] In this way, the drum cartridge 2 of this embodiment has the transfer roller 23. Therefore, when the drum cartridge 2 is replaced, the transfer roller 23 can also be replaced at the same time.

[0034] The transport roller 24 is a roller that can rotate about a rotation axis (transport roller axis) that extends in the second direction. The transport roller 24 is arranged along the transport opening 451. The photosensitive drum 22 and the transport roller 24 are arranged parallel to each other and spaced apart in the first direction. The transfer roller 23 and the transport roller 24 are also arranged parallel to each other and spaced apart in the first direction. The transport roller 24 rotates while contacting the printing paper. The printing paper is sent between the photosensitive drum 22 and the transfer roller 23 by contacting the transport roller 24 with the multiple ribs 116 of the developing cartridge 1.

[0035] As described above, the drum cartridge 2 of this embodiment has the transport roller 24. Therefore, when the drum cartridge 2 is replaced, the transport roller 24 can also be replaced at the same time.

[0036] The gear portion 25 is located on the first drum side plate 41. The gear portion 25 has a plurality of gears including the drum gear 251 described above, and a coupling 252. The plurality of gears are housed in a space formed between the frame main body 31 and the frame cover 32. The coupling 252 is exposed from the frame cover 32. When the process cartridge 100 is mounted in the image forming apparatus, a drive shaft of the image forming apparatus is connected to the coupling 252. Then, rotation of the drive shaft is transmitted to the plurality of gears including the drum gear 251 via the coupling 252.

[0037] The gears included in the gear unit 25 may transmit a rotational force by meshing of teeth, or may transmit a rotational force by friction.

[0038] The charger 26 is located at one end 211 of the drum frame 21 in the first direction. The charger 26 is arranged along the photosensitive drum 22. The charger 26 uniformly charges the surface of the photosensitive drum 22. In this embodiment, a scorotron charger is used as the charger 26. If a non-contact charger such as a scorotron charger is used, the surface of the photosensitive drum 22 can be charged without applying pressure. Therefore, deformation and damage to the photosensitive drum can be suppressed. However, instead of the non-contact charger, a contact charger such as a charging roller may be used.

[0039] The drum cartridge 2 also has a charging electrode 261. The charging electrode 261 is an electrode for supplying power to the charger 26. The charging electrode 261 is located on the outer surface of the second drum side plate 42. The charging electrode 261 is made of, for example, metal or conductive resin. The charging electrode 261 is in electrical contact with the charger 26. The charging electrode 261 also has a charging contact surface 262. When the process cartridge 100 is installed in the image forming apparatus, the charging contact surface 262 comes into contact with an electrode provided in the image forming apparatus. This allows power to be supplied from the image forming apparatus to the charger 26.

[0040] In this way, the drum cartridge 2 of this embodiment has the charger 26. Therefore, when the drum cartridge 2 is replaced, the charger 26 can also be replaced at the same time.

[0041] The first pressing member 27 and the second pressing member 28 are located at the other end 212 in the first direction of the drum frame 21. The first pressing member 27 protrudes in the first direction from one end in the second direction of the second connecting plate 44 toward the photosensitive drum 22. The second pressing member 28 protrudes in the first direction from the other end in the second direction of the second connecting plate 44 toward the photosensitive drum 22. The first pressing member 27 and the second pressing member 28 may be integral with the second connecting plate 44 or may be separate components.

[0042] When the developer cartridge 1 is attached to the drum frame 21, the casing 11 of the developer cartridge 1 comes into contact with the first pressing member 27 and the second pressing member 28. This presses the developer cartridge 1 toward one end 211 of the drum frame 21 in the first direction. As a result, the developer roller 13 is pressed toward the photosensitive drum 22.

[0043] <2-2.About IC chips> The drum cartridge 2 further includes an IC chip 29. The IC chip 29 is a plate-shaped storage medium (first storage medium). The IC chip 29 stores various information related to the drum cartridge 2 (for example, information related to the lifespan of components such as the photosensitive drum 22 and the charger 26).

[0044] FIG. 5 is an external view of the IC chip 29. As shown in FIG. 5, the IC chip 29 has a plurality of electrical contact surfaces 291 (first electrical contact surfaces). The plurality of electrical contact surfaces 291 are arranged in the second direction or the third direction. However, the number of electrical contact surfaces 291 that the IC chip 29 has may be one. The electrical contact surface 291 is made of a conductive metal. When the process cartridge 100 is installed in the image forming apparatus, the electrical contact surface 291 comes into contact with an electrical terminal provided on the image forming apparatus. This establishes electrical continuity between the electrical terminal and the electrical contact surface 291. As a result, the image forming apparatus can at least one of read information from the IC chip 29 and write information to the IC chip 29.

[0045] When the developer cartridge 1 is attached to the drum frame 21, the IC chip 29 is located on the exposed outer surface of the drum frame 21. Specifically, the IC chip 29 is fixed to the exposed outer surface of the drum frame 21. In this way, even when the developer cartridge 1 is attached to the drum frame 21, the electrical contact surface 291 of the IC chip 29 can be brought into contact with the electrical terminals of the image forming device. The IC chip 29 can be fixed to the drum frame 21 by, for example, adhesive or screwing.

[0046] Specifically, the multiple electrical contact surfaces 291 have an SIO (data) terminal 291A, a GND (ground) terminal 291B, an SCK (serial clock) terminal 291C, and a PWR (power) terminal 291D. The multiple electrical contact surfaces 291 are arranged in the first direction in the following order: SIO (data) terminal 291A, GND (ground) terminal 291B, SCK (serial clock) terminal 291C, and PWR (power) terminal 291D.

[0047] However, the arrangement order of the SIO (data) terminal 291A, GND (ground) terminal 291B, SCK (serial clock) terminal 291C, and PWR (power supply) terminal 291D is not limited to that in the above embodiment.

[0048] For example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the following order: SIO (data) terminal 291A, GND (ground) terminal 291B, PWR (power supply) terminal 291D, and SCK (serial clock) terminal 291C.

[0049] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the following order: SIO (data) terminal 291A, SCK (serial clock) terminal 291C, GND (ground) terminal 291B, and PWR (power supply) terminal 291D.

[0050] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the following order: SIO (data) terminal 291A, SCK (serial clock) terminal 291C, PWR (power supply) terminal 291D, and GND (ground) terminal 291B.

[0051] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the following order: SIO (data) terminal 291A, PWR (power) terminal 291D, GND (ground) terminal 291B, and SCK (serial clock) terminal 291C.

[0052] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the following order: SIO (data) terminal 291A, PWR (power) terminal 291D, SCK (serial clock) terminal 291C, and GND (ground) terminal 291B.

[0053] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the order of GND (ground) terminal 291B, SIO (data) terminal 291A, SCK (serial clock) terminal 291C, and PWR (power) terminal 291D.

[0054] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the following order: GND (ground) terminal 291B, SIO (data) terminal 291A, PWR (power supply) terminal 291D, and SCK (serial clock) terminal 291C.

[0055] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the order of GND (ground) terminal 291B, SCK (serial clock) terminal 291C, SIO (data) terminal 291A, and PWR (power) terminal 291D.

[0056] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the following order: GND (ground) terminal 291B, SCK (serial clock) terminal 291C, PWR (power supply) terminal 291D, and SIO (data) terminal 291A.

[0057] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the following order: GND (ground) terminal 291B, PWR (power) terminal 291D, SIO (data) terminal 291A, and SCK (serial clock) terminal 291C.

[0058] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the following order: GND (ground) terminal 291B, PWR (power) terminal 291D, SCK (serial clock) terminal 291C, and SIO (data) terminal 291A.

[0059] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the following order: SCK (serial clock) terminal 291C, SIO (data) terminal 291A, GND (ground) terminal 291B, and PWR (power) terminal 291D.

[0060] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the following order: SCK (serial clock) terminal 291C, SIO (data) terminal 291A, PWR (power supply) terminal 291D, and GND (ground) terminal 291B.

[0061] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the following order: SCK (serial clock) terminal 291C, GND (ground) terminal 291B, SIO (data) terminal 291A, and PWR (power) terminal 291D.

[0062] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the following order: SCK (serial clock) terminal 291C, GND (ground) terminal 291B, PWR (power supply) terminal 291D, and SIO (data) terminal 291A.

[0063] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the following order: SCK (serial clock) terminal 291C, PWR (power supply) terminal 291D, SIO (data) terminal 291A, and GND (ground) terminal 291B.

[0064] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the following order: SCK (serial clock) terminal 291C, PWR (power supply) terminal 291D, GND (ground) terminal 291B, and SIO (data) terminal 291A.

[0065] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the following order: PWR (power supply) terminal 291D, SIO (data) terminal 291A, GND (ground) terminal 291B, and SCK (serial clock) terminal 291C.

[0066] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the order of PWR (power supply) terminal 291D, SIO (data) terminal 291A, SCK (serial clock) terminal 291C, and GND (ground) terminal 291B.

[0067] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the following order: PWR (power supply) terminal 291D, GND (ground) terminal 291B, SIO (data) terminal 291A, and SCK (serial clock) terminal 291C.

[0068] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the order of PWR (power supply) terminal 291D, GND (ground) terminal 291B, SCK (serial clock) terminal 291C, and SIO (data) terminal 291A.

[0069] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the order of PWR (power supply) terminal 291D, SCK (serial clock) terminal 291C, SIO (data) terminal 291A, and GND (ground) terminal 291B.

[0070] Furthermore, for example, the multiple electrical contact surfaces 291 may be arranged in the first direction in the order of PWR (power supply) terminal 291D, SCK (serial clock) terminal 291C, GND (ground) terminal 291B, and SIO (data) terminal 291A.

[0071] The following describes the positions on the outer surface of the drum frame 21 where the IC chip 29 can be placed.

[0072] (a) When placed on the drum bottom plate Fig. 6 is a plan view of the process cartridge 100 as seen from the drum bottom plate 45 side. Positions 29(A) to 29(F) where the IC chip 29 can be placed are indicated by dashed lines in Fig. 6. Also, in Fig. 6, the transport path 9 for the print paper is indicated by a two-dot chain line.

[0073] The IC chip 29 can be disposed on the outer surface of the drum bottom plate 45, for example, as in positions 29(A) to 29(F). In this manner, the electrical contact surface 181 of the IC chip 18 of the developer cartridge 1 (described later) and the electrical contact surface 291 of the IC chip 29 of the drum cartridge 2 face the same direction. Therefore, when the process cartridge 100 is inserted into the image forming apparatus, these two electrical contact surfaces 181, 291 can be moved in the same direction and in the same posture. This makes it easy to reliably bring the electrical contact surface 181 into contact with an electrical terminal of the image forming apparatus and the electrical contact surface 291 into contact with another electrical terminal of the image forming apparatus at the same time.

[0074] Furthermore, the direction of the force that the electrical contact surface 181 receives from the electrical terminal of the image forming apparatus is the same as the direction of the force that the electrical contact surface 291 receives from the electrical terminal of the image forming apparatus, which makes it easy to position the process cartridge 100 relative to the image forming apparatus.

[0075] In the cases of positions 29(A) to 29(C), 29(E), and 29(F), the electrical contact surface 291 is located outside the conveying opening 451 in the second direction. Specifically, in the cases of positions 29(A) to 29(C), the electrical contact surface 291 is located between the conveying opening 451 and the other end of the drum frame 21 in the second direction in the second direction. In addition, in the cases of positions 29(E) and 29(F), the electrical contact surface 291 is located between the conveying opening 451 and one end of the drum frame 21 in the second direction in the second direction. In other words, the electrical contact surface 291 is located on the outer surface of the drum bottom plate 45 at a position that avoids the print paper transport path 9. This prevents the conveyed print paper from coming into contact with the electrical contact surface 291.

[0076] In particular, in the case of position 29(B), the electrical contact surface 291 is located on the opposite side of the first opening 452 with respect to the conveying opening 451. That is, when the developing cartridge 1, which will be described later, is attached to the drum frame 21, at least a portion of the electrical contact surface 291 is located on the opposite side of the conveying opening 451 from the electrical contact surface 181 exposed to the first opening 452. In this way, the electrical contact surfaces come into contact with the electrical terminals on both sides of the conveying opening 451 in the second direction. This prevents the electrical contact surfaces 181 and 291 from tilting relative to the image forming apparatus.

[0077] Furthermore, in the case of position 29(D), the electrical contact surface 291 is located, in the first direction, between the conveying opening 451 and one end 211 of the drum frame 21 in the first direction. In this case as well, the position of the electrical contact surface 291 is a position that avoids the print paper conveyance path 9. Therefore, the conveyed print paper can be prevented from coming into contact with the electrical contact surface 291. Furthermore, the user holds the handle 441 provided on the other end 212 of the drum frame 21 in the first direction. Therefore, by placing the electrical contact surface 291 at position 29(D), it is possible to prevent the user from coming into contact with the electrical contact surface 291.

[0078] In the case of position 29(D), at least a part of the electrical contact surface 291 may be located on the opposite side of the photosensitive drum 22 with respect to the transfer roller 23. In addition, in the case of position 29(D), the electrical contact surface 291 and the photosensitive drum 22 may overlap in the third direction. In addition, in the case of position 29(D), the position of the electrical contact surface 291 is preferably the center of the drum bottom plate 45 in the second direction. Specifically, it is preferable that at least one of the multiple electrical contact surfaces 291 of the IC chip 29 overlaps in the first direction with the center of the conveying opening 451 in the second direction. However, the position of the electrical contact surface 291 may be off-center of the drum bottom plate 45 in the second direction.

[0079] The drum bottom plate 45 has a first end 455 and a second end 456. The first end 455 is located on one side of the drum frame 21 in the second direction. The second end 456 is located on the other side of the drum frame 21 in the second direction. That is, the first end 455 is closer to the drum gear 251 than the second end 456. The first end 455 and the second end 456 are spaced apart in the second direction. The electrical contact surface 291 may be located on the outer surface of the first end 455, as in positions 29(A), 29(B), and 29(C). The electrical contact surface 291 may also be located on the outer surface of the second end 456, as in positions 29(E) and 29(F). In the cases of positions 29(E) and 29(F), transmission of vibrations from the drum gear 251 to the electrical contact surface 291 can be suppressed.

[0080] (b) When placed on the opposite side of the drum bottom plate Fig. 7 is a plan view of the process cartridge 100 as seen from the opposite side to the drum bottom plate 45. In Fig. 7, positions 29(G) to 29(J) where the IC chip 29 can be placed are indicated by dashed lines.

[0081] The electrical contact surface 291 may be arranged on the end surface of the first drum side plate 41, the second drum side plate 42, the first connecting plate 43, or the second connecting plate 44 opposite the drum bottom plate 45 in the third direction, as in positions 29(G) to 29(J).

[0082] The electrical contact surface 291 may be located on the outer surface of the one end 211 of the drum frame 21 in the first direction, as shown at positions 29(G) and 29(I). A user holds a handle 441 provided on the other end 212 of the drum frame 21. Therefore, by arranging the electrical contact surface 291 on the outer surface of the one end 211 of the drum frame 21, it is possible to prevent the user from touching the electrical contact surface 291.

[0083] Furthermore, the electrical contact surface 291 may be located on the outer surface of the other end 212 of the drum frame 21 in the first direction, as in positions 29(H) and 29(J). In this way, when the process cartridge 100 is mounted in the image forming apparatus, it is possible to prevent the electrical contact surface 291 from coming into contact with a part of the image forming apparatus.

[0084] (c) When placed on the first connecting plate Fig. 8 is a plan view of the process cartridge 100 as seen from the first connecting plate 43 side (one end side in the first direction). In Fig. 8, positions 29(K) and 29(L) where the IC chip 29 can be placed are indicated by dashed lines.

[0085] The electrical contact surface 291 may be disposed on the outer surface of the first connecting plate 43, as shown at positions 29(K) and 29(L). That is, the electrical contact surface 291 may be located on the outer surface of one end 211 of the drum frame 21 in the first direction. A user holds a handle 441 provided on the other end 212 of the drum frame 21. Therefore, by disposing the electrical contact surface 291 on the outer surface of the one end 211 of the drum frame 21, it is possible to prevent the user from coming into contact with the electrical contact surface 291.

[0086] In the cases of positions 29(K) and 29(L), the electrical contact surface 291 and the handle 441 held by the user are located at opposite ends of the drum cartridge 2 in the first direction. Also, the distance between the first connecting plate 43 and the photosensitive drum 22 in the first direction is shorter than the distance between the first connecting plate 43 and the handle 441 in the first direction. In this way, by moving the electrical contact surface 291 away from the handle 441, it is possible to prevent the user from coming into contact with the electrical contact surface 291.

[0087] The first connecting plate 43 has a first end 431 and a second end 432. The first end 431 is located on one side of the drum frame 21 in the second direction. The second end 432 is located on the other side of the drum frame 21 in the second direction. That is, the first end 431 is closer to the drum gear 251 than the second end 432. A portion of the outer surface of the drum gear 251 is covered by the first end 431. The first end 431 and the second end 432 are spaced apart in the second direction. The electrical contact surface 291 may be located on the outer surface of the first end 431, as at position 29(K). Alternatively, the electrical contact surface 291 may be located on the outer surface of the second end 432, as at position 29(L). In the case of position 29(L), transmission of vibrations from the drum gear 251 to the electrical contact surface 291 can be suppressed.

[0088] (d) When placed on the second connecting plate 9 is a plan view of the process cartridge 100 as seen from the second connecting plate 44 side (the other end side in the first direction). In FIG. 9, positions 29(M) to 29(Q) where the IC chip 29 can be placed are indicated by dashed lines.

[0089] The electrical contact surface 291 may be disposed on the outer surface of the second connecting plate 44, as in positions 29(M) to 29(Q). That is, the electrical contact surface 291 may be located on the outer surface of the other end 212 of the drum frame 21 in the first direction. In this way, when the process cartridge 100 is mounted in the image forming apparatus, it is possible to prevent the electrical contact surface 291 from coming into contact with a part of the image forming apparatus.

[0090] In particular, in the case of positions 29(M), 29(N), 29(P), and (Q), electrical contact surface 291 is positioned at a distance from handle 441 in the second direction. That is, electrical contact surface 291 is positioned at a different position from handle 441 in the second direction. This makes it possible to prevent the user from touching electrical contact surface 291.

[0091] The second connecting plate 44 has a first end 442 and a second end 443. The first end 442 is located on one side of the drum frame 21 in the second direction. The second end 443 is located on the other side of the drum frame 21 in the second direction. That is, the first end 442 is closer to the drum gear 251 than the second end 443. The first end 442 and the second end 443 are spaced apart in the second direction. The electrical contact surface 291 may be located on the outer surface of the first end 442, as at position 29(M). Alternatively, the electrical contact surface 291 may be located on the outer surface of the second end 443, as at position 29(Q). In the case of position 29(Q), transmission of vibrations from the drum gear 251 to the electrical contact surface 291 can be suppressed.

[0092] (e) When placed on the side panel of the first drum Fig. 10 is a plan view of the process cartridge 100 as seen from the first drum side plate 41 side (one side in the second direction). In Fig. 10, positions 29(R) and 29(S) where the IC chip 29 can be placed are indicated by dashed lines.

[0093] The electrical contact surface 291 may be located on the outer surface of the first drum side plate 41, as in positions 29(R) and 29(S). In this way, the electrical contact surface 291 and the charging contact surface 262 are located on opposite sides in the second direction. Therefore, when the process cartridge 100 is installed in the image forming apparatus, the electrical contact surface 291 is pressed toward the electrical terminals of the image forming apparatus by the force received when the charging contact surface 262 comes into contact with the electrical terminals of the image forming apparatus. This allows the electrical contact surface 291 to be stably brought into contact with the electrical terminals of the image forming apparatus.

[0094] (f) When placed on the side panel of the second drum Fig. 11 is a plan view of the process cartridge 100 as seen from the second drum side plate 42 side (the other side in the second direction). In Fig. 11, positions 29(T) to 29(V) where the IC chip 29 can be placed are indicated by dashed lines.

[0095] The electrical contact surface 291 may be located on the outer surface of the second drum side plate 42, as in positions 29(T) to 29(V). In this way, the electrical contact surface 291 and the charged contact surface 262 are located on the same side in the second direction. Therefore, when the process cartridge 100 is inserted into the image forming apparatus, the electrical contact surface 291 and the charged contact surface 262 can be moved in the same direction and in the same posture. This makes it easy to reliably bring the electrical contact surface 291 into contact with an electrical terminal of the image forming apparatus and the charged contact surface 262 into contact with another electrical terminal of the image forming apparatus at the same time.

[0096] Furthermore, the direction of the force that the electrical contact surface 291 receives from the electrical terminal of the image forming apparatus is the same as the direction of the force that the charging contact surface 262 receives from the electrical terminal of the image forming apparatus, which makes it easy to position the process cartridge 100 relative to the image forming apparatus.

[0097] In the case of position 29(U), at least a portion of the electrical contact surface 291 is located between the charged contact surface 262 and the drum shaft 222. In the case of position 29(T), at least a portion of the electrical contact surface 291 is located on the opposite side of the drum shaft 222 from the charged contact surface 262.

[0098] <3. About the developing cartridge> 12 and 13 are perspective views of the developer cartridge 1. The developer cartridge 1 attached to the drum cartridge 2 will be described below using the first, second, and third directions described above. The developer cartridge 1 supplies toner, which is a developer, to the photosensitive drum 22 of the drum cartridge 2. As shown in FIGS. 12 and 13, the developer cartridge 1 of this embodiment has a casing 11, an agitator 12, a development roller 13, a supply roller 14, a gear portion 15, a development electrode 16, a supply electrode 17, and an IC chip 18.

[0099] The casing 11 is a housing capable of containing toner. The casing 11 has a first developer side plate 111 and a second developer side plate 112. The first developer side plate 111 is located at one end of the casing 11 in the second direction. The second developer side plate 112 is located at the other end of the casing 11 in the second direction. The first developer side plate 111 and the second developer side plate 112 are spaced apart in the second direction. The gear portion 15 is located on the outer surface of the first developer side plate 111. The developer electrode 16 and the supply electrode 17 are located on the outer surface of the second developer side plate 112. A storage chamber 113 is provided inside the casing 11. The toner is stored in the storage chamber 113. The casing 11 also has an opening 114. The opening 114 is located at one end of the casing 11 in the first direction. The storage chamber 113 communicates with the outside via the opening 114.

[0100] The casing 11 also has a handle 115. Of the one end and the other end of the casing 11 in the first direction, the handle 115 is located at the other end that is farther from the developing roller 13. A user of the image forming apparatus holds this handle 115 when attaching or detaching the developing cartridge 1 to or from the drum cartridge 2. The casing 11 also has a plurality of ribs 116. The plurality of ribs 116 are located on the outer surface of the casing 11 at both ends in the third direction, on the outer surface farther from the developing roller 13. The plurality of ribs 116 are aligned at intervals from one another in the second direction. Each rib 116 protrudes from the outer surface of the casing 11 in the third direction.

[0101] The agitator 12 has an agitator shaft 121 and an agitating blade 122. The agitator shaft 121 is rotatable about a rotation axis extending in the second direction. The agitating blade 122 extends radially outward from the agitator shaft 121. At least a portion of the agitator shaft 121 and the agitating blade 122 are located within the storage chamber 113. One end of the agitator shaft 121 in the second direction is fixed to an agitator gear included in the gear unit 15. Therefore, the agitator shaft 121 and the agitating blade 122 rotate when driven by the gear unit. When the agitating blade 122 rotates, the toner in the storage chamber 113 is agitated.

[0102] The developing roller 13 is a roller that can rotate about a rotation axis (second axis) that extends in the second direction. The developing roller 13 is located in an opening 114 of the casing 11. That is, the developing roller 13 is located at one end of the casing 11 in the first direction. When the developing cartridge 1 is attached to the drum cartridge 2, the surface of the developing roller 13 comes into contact with the surface of the photosensitive drum 22, which will be described later.

[0103] The developing roller 13 has a developing roller main body 131 and a developing roller shaft 132. The developing roller main body 131 is a cylindrical member extending in a first direction. The developing roller main body 131 is made of, for example, elastic rubber. The developing roller shaft 132 is a cylindrical member that penetrates the developing roller main body 131 in the first direction. The developing roller shaft 132 is made of, for example, metal or conductive resin. The developing roller main body 131 is fixed to the developing roller shaft 132 so as not to rotate relative to it.

[0104] One end of the developing roller shaft 132 in the second direction is fixed to a developing roller gear included in the gear portion 15. Therefore, the developing roller shaft 132 and the developing roller main body 131 are rotated by the driving of the gear portion 15. Note that the developing roller shaft 132 does not have to penetrate the developing roller main body 131 in the second direction. For example, a pair of developing roller shafts 132 may extend in the second direction from both ends of the developing roller main body 131 in the second direction.

[0105] The supply roller 14 is located between the developing roller 13 and the storage chamber 113. The supply roller 14 is a roller that can rotate about a rotation axis (supply roller axis) that extends in the second direction. The supply roller 14 has a supply roller main body 141 and a supply roller shaft 142. The supply roller main body 141 is a cylindrical member that extends in the first direction. The outer circumferential surface of the supply roller main body 141 contacts the outer circumferential surface of the developing roller main body 131. The material of the supply roller main body 141 is, for example, elastic rubber. The supply roller shaft 142 is a cylindrical member that penetrates the supply roller main body 141 in the first direction. The material of the supply roller shaft 142 is, for example, metal or conductive resin. The supply roller main body 141 is fixed to the supply roller shaft 142 so as not to rotate relative to it.

[0106] One end of the supply roller shaft 142 in the second direction is fixed to a supply roller gear included in the gear unit 15. Therefore, the supply roller shaft 142 and the supply roller main body 141 are rotated by the driving of the gear unit 15. Note that the supply roller shaft 142 does not have to penetrate the supply roller main body 141 in the second direction. For example, a pair of supply roller shafts 142 may extend in the second direction from both ends of the supply roller main body 141 in the second direction.

[0107] When the gear portion 15 is driven, toner is supplied from the storage chamber 113 in the casing 11 to the outer circumferential surface of the developing roller 13 via the supply roller 14. At this time, the toner is frictionally charged between the supply roller 14 and the developing roller 13. Meanwhile, a bias voltage is applied to the developing roller shaft 132 of the developing roller 13. Therefore, the toner is attracted to the outer circumferential surface of the developing roller main body 131 by the electrostatic force between the developing roller shaft 132 and the toner.

[0108] The developing cartridge 1 also has a layer thickness regulating blade (not shown). The layer thickness regulating blade shapes the toner supplied to the outer peripheral surface of the developing roller main body 131 to a uniform thickness. The toner on the outer peripheral surface of the developing roller main body 131 is then supplied to the photosensitive drum 22 (described later). At this time, the toner moves from the developing roller main body 131 to the photosensitive drum 22 in accordance with the electrostatic latent image formed on the outer peripheral surface of the photosensitive drum 22. As a result, the electrostatic latent image is visualized on the outer peripheral surface of the photosensitive drum 22.

[0109] The gear unit 15 is located on the outer surface of the first developing device side plate 111 of the casing 11. The gear unit 15 has a plurality of gears including the above-mentioned agitator gear, developing roller gear, and supply roller gear, a coupling 151, and a gear cover 152. The gear cover 152 is fixed to the first developing device side plate 111 of the casing 11 by, for example, screws. At least some of the plurality of gears are located between the first developing device side plate 111 and the gear cover 152. The coupling 151 is exposed from the gear cover 152. When the process cartridge 100 is installed in the image forming apparatus, a drive shaft of the image forming apparatus is connected to the coupling 151. Then, rotation of the drive shaft is transmitted to the plurality of gears including the agitator gear, developing roller gear, and supply roller gear via the coupling 151.

[0110] The gears included in the gear unit 15 may transmit a rotational force by meshing of teeth, or may transmit a rotational force by friction.

[0111] The developing electrode 16 is an electrode for supplying power to the developing roller 13. The developing electrode 16 is located on the outer surface of the second developing side plate 112 of the casing 11. The developing electrode 16 is made of, for example, metal or conductive resin. The developing electrode 16 is in electrical contact with the other end of the developing roller shaft 132 in the second direction, and rotatably supports the other end of the developing roller shaft 132 in the second direction. The developing electrode 16 also has a developing contact surface 161. When the process cartridge 100 is installed in the image forming apparatus, the developing contact surface 161 comes into contact with an electrical terminal provided in the image forming apparatus. This allows power to be supplied from the image forming apparatus to the developing roller shaft 132.

[0112] The supply electrode 17 is an electrode for supplying power to the supply roller 14. The supply electrode 17 is located on the outer surface of the second developing side plate 112 of the casing 11. The supply electrode 17 is made of, for example, metal or conductive resin. The supply electrode 17 is in electrical contact with the other end of the supply roller shaft 142 in the second direction, and rotatably supports the other end of the supply roller shaft 142 in the second direction. The supply electrode 17 also has a supply contact surface 181. When the process cartridge 100 is installed in the image forming apparatus, the supply contact surface 181 comes into contact with an electrode provided in the image forming apparatus. This supplies a bias voltage from the image forming apparatus to the supply roller shaft 142. As a result, a bias voltage is generated between the developing roller 13 and the supply roller 14.

[0113] The IC chip 18 is a plate-shaped storage medium (second storage medium). The IC chip 18 stores various information related to the developer cartridge 1 (for example, information related to the lifespan of components such as the developing roller 13). As shown in FIG. 13, the IC chip 18 is located at one end of the casing 11 in the second direction. In this embodiment, the IC chip 18 is fixed to one of the outer surfaces at both ends of the gear cover 152 in the third direction, the outer surface farther from the developing roller 13. However, the IC chip 18 may also be fixed to one of the outer surfaces at both ends of the casing 11 in the third direction, the outer surface farther from the developing roller 13.

[0114] The IC chip 18 has a plurality of electrical contact surfaces 181 (second electrical contact surfaces). The plurality of electrical contact surfaces 181 are aligned in the second direction. Each electrical contact surface 181 is perpendicular to the third direction. However, the number of electrical contact surfaces 181 that the IC chip 18 has may be one. The electrical contact surface 181 is made of a conductive metal. When the process cartridge 100 is installed in the image forming apparatus, the electrical contact surface 181 comes into contact with an electrical terminal provided on the image forming apparatus. This establishes electrical continuity between the electrical terminal and the electrical contact surface 181. As a result, the image forming apparatus can at least one of read information from the IC chip 18 and write information to the IC chip 18.

[0115] <4. Modifications> Although the first and second embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments.

[0116] For example, in the above embodiment, the IC chip having the electrical contact surface is fixed to the outer surface of the drum frame. However, it is also possible to fix only the electrical contact surface to the outer surface of the drum frame, and to position the rest of the IC chip elsewhere in the drum cartridge.

[0117] Furthermore, the first direction and the second direction do not have to be perpendicular to each other. Furthermore, the second direction and the third direction do not have to be perpendicular to each other. Furthermore, the first direction and the third direction do not have to be perpendicular to each other.

[0118] Furthermore, the detailed shapes of the developing cartridge and drum cartridge may differ from those shown in the drawings of the present application. Furthermore, the elements appearing in the above-described embodiments and modifications may be combined as appropriate within the scope of not causing any contradiction. [Explanation of symbols]

[0119] 1 Developer cartridge 2 drum cartridges 9 Transport Route 11 Casing 12 Agitator 13 Developing roller 14 Supply roller 15 Gear section 16 Development electrode 17 Supply electrode 18 IC chip 21 Drum Frame 22 Photosensitive drum 23 Transfer roller 24 Conveyor roller 25 Gear section 26 Charger 27 First pressing member 28 Second pressing member 29 IC chip 31 Frame body 32 Frame cover 41 First drum side plate 42 Second drum side plate 43 1st connection plate 44 2nd connecting plate 45 Drum bottom plate 100 Process cartridge 181 Electrical Contact Surface 210 recess 211 One end 212 Other end 221 Drum body 222 Drum shaft 251 Drum Gear 252 Coupling 261 Charged Electrode 291 Electrical Contact Surface 441 Handle 451 Conveyor opening 452 First Opening

Claims

1. a drum frame into which the developing cartridge can be mounted, the drum frame including one end in a first direction and another end spaced apart from the one end in the first direction; a photosensitive drum rotatable about a first axis extending in a second direction, the photosensitive drum being located at the one end; a first storage medium including a first electrical contact surface located on an exposed outer surface of the drum frame when the developer cartridge is attached to the drum frame; A drum cartridge comprising:

2. 2. The drum cartridge according to claim 1, wherein the second direction is a direction intersecting the first direction.

3. 3. The drum cartridge according to claim 1, wherein the first electrical contact surface is located on an outer surface of the one end portion.

4. 4. The drum cartridge according to claim 3, wherein the drum frame has a handle located on the outer surface of the other end.

5. 3. The drum cartridge according to claim 1, wherein the first electrical contact surface is located on an outer surface of the other end portion.

6. The drum frame is A first drum side plate; a second drum side plate spaced apart from the first drum side plate in the second direction, the photosensitive drum being positioned between the second drum side plate and the first drum side plate; a first connecting plate that connects the first drum side plate and the second drum side plate, the first connecting plate being located at the one end and covering a part of the outer surface of the photosensitive drum; and 4. The drum cartridge according to claim 3, wherein the first electrical contact surface is located on an outer surface of the first connecting plate.

7. The drum frame is a second connecting plate that connects the first drum side plate and the second drum side plate, the second connecting plate being located at the other end, and the photosensitive drum being located between the second connecting plate and the first connecting plate in the first direction, 7. The drum cartridge according to claim 6, wherein the drum frame has a handle located on an outer surface of the second connecting plate.

8. 8. The drum cartridge according to claim 7, wherein the distance between the first connecting plate and the photosensitive drum in the first direction is shorter than the distance between the first connecting plate and the handle in the first direction.

9. the photosensitive drum has a drum shaft extending in the second direction, 9. The drum cartridge according to claim 8, wherein a distance between the first connecting plate and the drum shaft in the first direction is shorter than a distance between the first connecting plate and the handle in the first direction.

10. the photosensitive drum has a drum gear rotatable about the first shaft and positioned on one side of the drum frame in the second direction; The first connecting plate is a first end portion located on one side of the drum frame in the second direction and covering a portion of an outer surface of the drum gear; a second end separated from the first end in the second direction; and 10. The drum cartridge according to claim 6, wherein the first electrical contact surface is located on an outer surface of the first end portion.

11. the photosensitive drum has a drum gear rotatable about the first shaft and positioned on one side of the drum frame in the second direction; The first connecting plate is a first end portion located on one side of the drum frame in the second direction and covering a portion of an outer surface of the drum gear; a second end separated from the first end in the second direction; and 10. The drum cartridge according to claim 6, wherein the first electrical contact surface is located on an outer surface of the second end portion.

12. The drum frame is A first drum side plate; a second drum side plate spaced apart from the first drum side plate in the second direction, the photosensitive drum being positioned between the second drum side plate and the first drum side plate; a first connecting plate that connects the first drum side plate and the second drum side plate, the first connecting plate being located at the one end and covering a part of the photosensitive drum; a second connecting plate that connects the first drum side plate and the second drum side plate, the second connecting plate being located at the other end, and the photosensitive drum being located between the second connecting plate and the first connecting plate in the first direction, 6. The drum cartridge according to claim 5, wherein the first electrical contact surface is located on an outer surface of the second connecting plate.

13. 13. The drum cartridge according to claim 12, wherein the drum frame has a handle located on an outer surface of the second connecting plate.

14. 14. The drum cartridge according to claim 13, wherein the first electrical contact surface is spaced apart from the handle in the second direction.

15. the photosensitive drum has a drum gear rotatable about the first shaft and positioned on one side of the drum frame in the second direction; The second connecting plate is a first end portion located on one side of the drum frame in the second direction; a second end separated from the first end in the second direction; and 15. The drum cartridge according to claim 12, wherein the first electrical contact surface is located on an outer surface of the first end portion.

16. the photosensitive drum has a drum gear rotatable about the first shaft and positioned on one side of the drum frame in the second direction; The second connecting plate is a first end portion located on one side of the drum frame in the second direction; a second end separated from the first end in the second direction; and 15. The drum cartridge according to claim 12, wherein the first electrical contact surface is located on an outer surface of the second end portion.

17. a charger for charging the surface of the photosensitive drum, the charger being located at the one end; a charging electrode for supplying power to the charger, the charging electrode having a charging contact surface; Furthermore, The drum frame is A first drum side plate; a second drum side plate spaced apart from the first drum side plate in the second direction, the photosensitive drum being positioned between the second drum side plate and the first drum side plate; and the charging contact surface is located on the outer surface of the second drum side plate; 3. The drum cartridge according to claim 1, wherein the first electrical contact surface is located on an outer surface of the second drum side plate.

18. 18. The drum cartridge according to claim 17, wherein the charger is a scorotron charger.

19. the photosensitive drum has a drum shaft extending in the second direction, 19. The drum cartridge according to claim 17 or 18, wherein at least a portion of the first electrical contact surface is located between the charging contact surface and the drum shaft.

20. the photosensitive drum has a drum shaft extending in the second direction, 19. The drum cartridge according to claim 17 or 18, wherein at least a portion of the first electrical contact surface is located on the opposite side of the drum shaft to the charging contact surface.

21. a charger for charging the surface of the photosensitive drum, the charger being located at the one end; a charging electrode for supplying power to the charger, the charging electrode having a charging contact surface; Furthermore, The drum frame is A first drum side plate; a second drum side plate spaced apart from the first drum side plate in the second direction, the photosensitive drum being positioned between the second drum side plate and the first drum side plate; and the charging contact surface is located on the outer surface of the second drum side plate; 3. The drum cartridge according to claim 1, wherein the first electrical contact surface is located on an outer surface of the first drum side plate.

22. 22. The drum cartridge according to claim 21, wherein the charger is a scorotron charger.

23. a transfer roller rotatable about a transfer roller axis extending in the second direction and positioned at the one end; a conveying roller rotatable about a conveying roller axis extending in the second direction and positioned at a distance from the transfer roller in the first direction; Furthermore, The drum frame is A first drum side plate; a second drum side plate spaced apart from the first drum side plate in the second direction, the photosensitive drum being positioned between the second drum side plate and the first drum side plate; a drum bottom plate connecting the first drum side plate and the second drum side plate, the drum bottom plate having a conveying opening positioned between the transfer roller and the conveying roller in the first direction; and 3. The drum cartridge according to claim 1, wherein the first electrical contact surface is located on an outer surface of the drum bottom plate.

24. the developer cartridge includes a second storage medium having a second electrical contact surface; the drum bottom plate has a first opening; 24. The drum cartridge according to claim 23, wherein the second electrical contact surface is exposed from the first opening when the developer cartridge is attached to the drum frame.

25. 25. A process cartridge according to claim 24, wherein at least a portion of the first electrical contact surface is located on the opposite side of the second electrical contact surface with respect to the conveying opening when the developer cartridge is attached to the drum frame.

26. 25. The drum cartridge according to claim 23, wherein at least a part of the first electrical contact surface is located on the opposite side of the photosensitive drum with respect to the transfer roller.

27. The photosensitive drum is a drum gear rotatable about the first shaft, the drum gear being located on one side of the drum frame in the second direction; and The drum bottom plate is a first end portion located on one side of the drum frame in the second direction; a second end separated from the first end in the second direction; and 27. The drum cartridge according to claim 23, wherein the first electrical contact surface is located on an outer surface of the first end portion.

28. The photosensitive drum is a drum gear rotatable about the first shaft, the drum gear being located on one side of the drum frame in the second direction; and The drum bottom plate is a first end portion located on one side of the drum frame in the second direction; a second end separated from the first end in the second direction; and 27. The drum cartridge according to claim 23, wherein the first electrical contact surface is located on an outer surface of the second end portion.

29. a transfer roller rotatable about a transfer roller axis extending in the second direction, the transfer roller being located at the one end; 23. The drum cartridge according to claim 1, further comprising:

30. a conveying roller that is rotatable about a conveying roller axis that extends in the second direction and is positioned at a distance from the photosensitive drum in the first direction; 23. The drum cartridge according to claim 1, further comprising:

31. a transfer roller rotatable about a transfer roller axis extending in the second direction and positioned at the one end; a conveying roller rotatable about a conveying roller axis extending in the second direction and positioned at a distance from the photosensitive drum in the first direction; Furthermore, 23. The drum cartridge according to claim 1, wherein the drum frame has a transport opening located between the pre-transfer roller and the transport roller in the first direction.

32. the developer cartridge includes a second storage medium having a second electrical contact surface; The drum frame is A first drum side plate; a second drum side plate spaced apart from the first drum side plate in the second direction, the photosensitive drum being positioned between the second drum side plate and the first drum side plate; a drum bottom plate connecting the first drum side plate and the second drum side plate, the drum bottom plate having a conveying opening positioned between the transfer roller and the conveying roller in the first direction, the drum bottom plate having a first opening; and 32. The drum cartridge according to claim 1, wherein the second electrical contact surface is exposed from the first opening when the developer cartridge is attached to the drum frame.

33. 33. The drum cartridge according to claim 1, further comprising a charger for charging the surface of the photosensitive drum, the charger being located at the one end.

34. 34. The drum cartridge according to claim 33, wherein the charger is a scorotron charger.

35. The developing cartridge is a developing roller rotatable about a second axis extending in the second direction; and a pressing member that presses the developing roller toward the photosensitive drum when the developing cartridge is attached to the drum frame, the pressing member being located at the other end 35. The drum cartridge according to claim 1, further comprising:

36. 28. The drum cartridge according to claim 23, wherein the first electrical contact surface is located outside the transport opening in the second direction.

37. 27. The drum cartridge according to claim 23, claim 24, or claim 26, wherein the first electrical contact surface is located between the transport opening and the one end in the first direction.

38. 38. The drum cartridge according to claim 37, wherein the first electrical contact surface and the photosensitive drum overlap in a third direction that intersects with the first direction and the second direction.

39. 39. The drum cartridge according to claim 37 or 38, wherein the first electrical contact surface is located at the center of the drum bottom plate in the second direction.

40. 40. A drum cartridge as described in any one of claims 1 to 35 or any one of claims 36 to 39, wherein the first storage medium having the first electrical contact surface is fixed to the outer surface of the drum frame.

41. a drum frame including one end in a first direction and another end spaced apart from the one end in the first direction; a photosensitive drum rotatable about a first axis extending in a second direction, the photosensitive drum being located at the one end of the drum frame; a first storage medium including a first electrical contact surface; a drum cartridge comprising: a housing capable of containing toner, the housing including one end in the first direction and another end spaced apart from the one end in the first direction; a developing roller rotatable about a second axis extending in the second direction, the developing roller being located at the one end of the housing; a second storage medium including a second electrical contact surface located on an outer surface of the housing; a developing cartridge that is mountable to the drum frame; Equipped with a developing cartridge mounted on the drum frame, the developing cartridge being attached to the drum frame, the first storage medium being located on an exposed outer surface of the drum frame;

42. 42. A process cartridge according to claim 41, wherein said second direction is a direction intersecting said first direction.

43. The drum cartridge is a transfer roller rotatable about a transfer roller axis extending in the second direction and positioned at the one end; a conveying roller rotatable about a conveying roller axis extending in the second direction and positioned at a distance from the transfer roller in the first direction; Furthermore, The drum frame is A first drum side plate; a second drum side plate spaced apart from the first drum side plate in the second direction, the photosensitive drum being positioned between the second drum side plate and the first drum side plate; a drum bottom plate connecting the first drum side plate and the second drum side plate, the drum bottom plate having a conveying opening positioned between the transfer roller and the conveying roller in the first direction, the drum bottom plate having a first opening; and 43. A process cartridge according to claim 41 or 42, wherein said second electrical contact surface is exposed from said first opening when said developing cartridge is mounted on said drum frame.

44. the developer cartridge includes a developer electrode for supplying power to the developer roller, the developer electrode having a developer contact surface; The drum frame is A first drum side plate; a second drum side plate spaced apart from the first drum side plate in the second direction, the photosensitive drum being positioned between the second drum side plate and the first drum side plate; and The housing includes: a first developing side plate facing the first drum side plate when the developing cartridge is attached to the drum frame; a second developer side plate spaced apart from the first developer side plate in the second direction, the second developer side plate facing the second drum side plate when the developer cartridge is attached to the drum frame; and the developer contact surface is located on an outer surface of the second developer side plate, 44. A process cartridge according to claim 41, wherein said first electrical contact surface is located on an outer surface of said first drum side plate.

45. The developing cartridge is a supply roller rotatable about a supply roller axis extending in the second direction; a supply electrode for supplying power to the supply roller, the supply electrode having a supply contact surface; Furthermore, 45. A process cartridge according to claim 44, wherein said supply electrode is located on an outer surface of said second developing side plate.

46. the developer cartridge includes a developer electrode for supplying power to the developer roller, the developer electrode having a developer contact surface; The drum frame is A first drum side plate; a second drum side plate spaced apart from the first drum side plate in the second direction, the photosensitive drum being positioned between the second drum side plate and the first drum side plate; and The housing includes: a first developing side plate facing the first drum side plate when the developing cartridge is attached to the drum frame; a second developer side plate spaced apart from the first developer side plate in the second direction, the second developer side plate facing the second drum side plate when the developer cartridge is attached to the drum frame; and the developer contact surface is located on an outer surface of the second developer side plate, 44. A process cartridge according to claim 41, wherein said first electrical contact surface is located on an outer surface of said second drum side plate.

47. The developing cartridge is a supply roller rotatable about a supply roller axis extending in the second direction; a supply electrode for supplying power to the supply roller, the supply electrode having a supply contact surface; Furthermore, 47. A process cartridge according to claim 46, wherein said supply electrode is located on an outer surface of said second developing side plate.

48. The drum cartridge is a transfer roller rotatable about a transfer roller axis extending in the second direction and positioned at the one end; a conveying roller rotatable about a conveying roller axis extending in the second direction and positioned at a distance from the transfer roller in the first direction; Furthermore, The drum frame is A first drum side plate; a second drum side plate spaced apart from the first drum side plate in the second direction, the photosensitive drum being positioned between the second drum side plate and the first drum side plate; a drum bottom plate connecting the first drum side plate and the second drum side plate, the drum bottom plate having a conveying opening positioned between the transfer roller and the conveying roller in the first direction, the drum bottom plate having a first opening; and the first electrical contact surface is located on the outer surface of the drum bottom plate; 44. A process cartridge according to claim 41, wherein the second electrical contact surface is exposed from the first opening when the developer cartridge is mounted on the drum frame.

49. A process cartridge according to claim 48, wherein at least a portion of the first electrical contact surface is located on the opposite side of the second electrical contact surface with respect to the transport opening when the developer cartridge is attached to the drum frame.

Images