JP7318436B2 - drum cartridge - Google Patents

Description

The present disclosure relates to drum cartridges.

2. Description of the Related Art Conventionally, electrophotographic image forming apparatuses such as laser printers and LED printers are known. The image forming apparatus has a drum cartridge. A drum cartridge has a plurality of photosensitive drums. A plurality of developer cartridges are detachable from the drum cartridge. When the developing cartridge is attached to the drum cartridge, the developing roller of the developing cartridge and the photosensitive drum of the drum cartridge come into contact with each other.

A drum cartridge is described in Patent Document 1, for example.

JP 2019-28345 A

Further, as described in Japanese Patent Application Laid-Open No. 2002-200013, a developing cartridge having a toner memory is known. The toner memory stores various information regarding the developing cartridge.

Further, in the example described in Patent Document 1, information stored in a toner memory is transmitted to the image forming apparatus via the drum cartridge in a state where the drum cartridge with the developing cartridge is attached to the image forming apparatus. do. Specifically, the drum cartridge is electrically connected to the photosensitive drum, a toner connector electrically connected to the toner memory, a relay board for relaying information stored in the toner memory, and the image forming apparatus. It has a main body connector, a first harness that electrically connects the toner connector and the relay board, and a second harness that electrically connects the relay board and the main body connector.

However, in the example described in Japanese Patent Application Laid-Open No. 2002-100001, when the toner is discharged out of the developing cartridge, the relay board may be contaminated by the toner adhering to the relay board.

An object of the present disclosure is to make it difficult for the toner discharged outside the developing cartridge to adhere to the relay substrate.

A first aspect of the present application provides a drum cartridge including a photosensitive drum, a drum memory, a drum frame, a first connector, a relay board, and a second connector. The photosensitive drum is rotatable about a drum shaft extending in a first direction. The drum memory stores information about the photosensitive drum. The drum frame has a slot into which a developer cartridge having a toner memory for storing information about the developer cartridge can be loaded. The drum frame has a first frame, a second frame, a third frame and a fourth frame. The first frame is positioned at one end of the photosensitive drum in the first direction. The second frame is positioned at the other end of the photosensitive drum in the first direction. The third frame connects one end of the first frame in a second direction crossing the first direction and one end of the second frame in the second direction. The fourth frame connects the other end of the first frame in the second direction and the other end of the second frame in the second direction. The first connector is located on the second frame and is electrically connectable to the toner memory of the developing cartridge when the developing cartridge is attached to the drum frame. The relay board is electrically connectable to the first connector and the drum memory. The second connector is a second connector electrically connectable to a body connector of the image forming apparatus in a state where the drum cartridge is attached to the body frame of the image forming apparatus, and is located on the fourth frame. A second connector that is electrically connectable to the first connector through the relay board. The photosensitive drum and the slot are positioned between the third frame and the fourth frame in the second direction. The relay board is positioned on the outer surface of the fourth frame.

According to a second aspect of the present application, in the drum cartridge according to the first aspect, the photosensitive drum faces the developing roller when the developing cartridge having the developing roller is mounted in the slot. The fourth frame is positioned between the relay board and the photosensitive drum and the developing roller in the second direction when the developing cartridge is installed in the slot.

According to a third aspect of the present application, in the drum cartridge according to the first aspect or the second aspect, the drum frame rotatably holds the plurality of photosensitive drums arranged in the second direction.

According to a fourth aspect of the present application, in the drum cartridge according to the first aspect or the second aspect, the drum frame can mount a plurality of the developing cartridges corresponding to the plurality of the photosensitive drums.

According to a fifth aspect of the present application, the drum cartridge according to the fourth aspect comprises a plurality of first connectors corresponding to a plurality of developer cartridges.

According to a sixth aspect of the present application, in the drum cartridge according to any one of the first to fifth aspects, the third frame is located upstream of the body frame of the image forming apparatus in a mounting direction of the drum cartridge. Located in The fourth frame is positioned downstream in the mounting direction of the drum cartridge with respect to the body frame of the image forming apparatus.

According to a seventh aspect of the present application, in the drum cartridge according to any one of the first to sixth aspects, the second connector is located at one end of the outer surface of the fourth frame in the first direction. . The relay board is positioned at the other end of the outer surface of the fourth frame in the first direction.

According to an eighth aspect of the present application, the drum cartridge of the seventh aspect further comprises a handle. The handle is located on the fourth frame. The handle is positioned between the second connector and the relay board in the first direction.

According to a ninth aspect of the present application, the drum cartridge according to any one of the first to eighth aspects further includes a first wire and a second wire. The first wire is a first wire that connects the relay board and the first connector, is positioned on the second frame, and extends in the second direction. The second wire is a second wire that connects the relay board and the second connector, is positioned on the fourth frame, and extends in the first direction.

According to a tenth aspect of the present application, in the drum cartridge of the ninth aspect, the first wire is positioned on the inner surface of the second frame.

According to an eleventh aspect of the present application, in the drum cartridge of the ninth or tenth aspect, the second wire has a first portion and a second portion. The first portion is located on the outer surface of the fourth frame. The second portion is located on the inner surface of the fourth frame.

According to a twelfth aspect of the present application, in the drum cartridge according to any one of the first to eleventh aspects, the drum frame has a cover that covers the relay board.

According to a thirteenth aspect of the present application, in the drum cartridge according to any one of the first to twelfth aspects, the drum memory is located on the relay board.

According to a fourteenth aspect of the present application, the drum cartridge according to any one of the first to thirteenth aspects further comprises a thermistor located on the relay board.

According to a fifteenth aspect of the present application, in the drum cartridge of the fourteenth aspect, the thermistor is positioned on the drum memory.

According to a sixteenth aspect of the present application, in the drum cartridge according to any one of the first to fifteenth aspects, the relay board is inclined with respect to the second direction.

According to the first to sixteenth aspects of the present application, the toner discharged outside the developing cartridge is less likely to adhere to the relay board.

According to the second aspect of the present application, it is possible to prevent the relay board from being soiled by toner leaking from the developing roller.

According to the eighth aspect of the present application, it becomes easier for the user to grip the central portion of the outer surface of the fourth frame in the first direction.

According to the twelfth aspect of the present application, the toner discharged outside the developing cartridge is less likely to adhere to the relay board.

According to the sixteenth aspect of the present application, the area of the relay substrate can be increased. In addition, since it is easy to secure a space outside the relay board, the wiring connected to the relay board can be easily bent in the space outside the relay board.

1 is a schematic diagram of an image forming apparatus; FIG. 3 is a perspective view of a drum cartridge; FIG. FIG. 4 is a perspective view of the drum cartridge, showing a state in which one developing cartridge is removed; FIG. FIG. 4 is a perspective view of the drum cartridge, showing a state in which a cover is removed; It is a perspective view of a circuit part. 4 is a cross-sectional view of part of the drum cartridge; FIG. 4 is a plan view of a relay board; FIG. FIG. 4 is a perspective view of a cover;

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

In the following description, the direction in which the rotation center axis (drum axis) of the photosensitive drum of the drum cartridge extends is referred to as "first direction". Also, the direction in which the plurality of photosensitive drums are arranged is referred to as the "second direction". The first direction and the second direction intersect, more preferably orthogonal. Further, a direction intersecting, more preferably perpendicular to, the first direction and the second direction is defined as a "third direction".

<1. Configuration of Image Forming Apparatus>
FIG. 1 is a schematic diagram of an image forming apparatus 1. As shown in FIG. The image forming apparatus 1 is an electrophotographic printer. Examples of the image forming apparatus 1 include laser printers and LED printers. As shown in FIG. 1, the image forming apparatus 1 includes a drum cartridge 10 and an image forming apparatus main body 2. As shown in FIG. The image forming apparatus main body 2 includes a main body frame 99 . The drum cartridge 10 is attachable to and detachable from the body frame 99 of the image forming apparatus body 2 . The image forming apparatus main body 2 has a control section 3 .

<2. Configuration of Drum Cartridge>
The configuration of the drum cartridge 10 will be described below. FIG. 2 is a perspective view of the drum cartridge 10. FIG. FIG. 3 is a perspective view of the drum cartridge 10, showing how one developer cartridge 13 is removed. FIG. 4 is a perspective view of the drum cartridge 10, showing a state in which a cover 14, which will be described later, is removed. The drum cartridge 10 includes four photosensitive drums 11 (see FIG. 1), a drum frame 12, four developer cartridges 13, a cover 14, and a circuit section 100 (see FIG. 5 described later). Each developer cartridge 13 also has a toner memory 15 .

Each of the four photosensitive drums 11 has a cylindrical outer peripheral surface centered on a drum axis, which is a rotation center axis extending in the first direction. The outer peripheral surface of the photoreceptor drum 11 is covered with a photosensitive material. Each of the four photosensitive drums 11 is rotatable around a drum shaft extending in the first direction.

The drum frame 12 is a frame that rotatably holds the four photosensitive drums 11 . The drum frame 12 holds the plurality of photoreceptor drums 11 spaced apart from each other in the second direction. The drum frame 12 has a first frame 12a, a second frame 12b, a third frame 12c and a fourth frame 12d.

The first frame 12a is positioned at one end of the photosensitive drum 11 in the first direction. The second frame 12b is positioned at the other end of the photosensitive drum 11 in the first direction. The second frame 12b is positioned apart from the first frame 12a in the first direction. The first frame 12a and the second frame 12b are parallel to each other.

The third frame 12c connects one end of the first frame 12a in the second direction and one end of the second frame 12b in the second direction. The third frame 12c is positioned upstream in the mounting direction of the drum cartridge 10 with respect to the body frame of the image forming apparatus body 2 . The fourth frame 12d connects the other end of the first frame 12a in the second direction and the other end of the second frame 12b in the second direction. The fourth frame 12 d is located downstream of the body frame 99 of the image forming apparatus body 2 in the mounting direction of the drum cartridge 10 . The fourth frame 12d is positioned apart from the third frame 12c in the second direction. The third frame 12c and the fourth frame 12d are parallel to each other.

Also, as shown in FIGS. 1 and 3, the drum frame 12 has a plurality of slots 130 . The plurality of slots 130 are spaced apart in the second direction. The developer cartridge 13 is installed in the slot 130 . Therefore, a plurality of developer cartridges 13 can be attached to the drum frame 12 . When the developing cartridge 13 is installed in the slot 130, the outer peripheral surface of the photoreceptor drum 11 and the outer peripheral surface of the developing roller 18 of the developing cartridge 13 come into contact with each other.

In a state where a plurality of developer cartridges 13 are attached to the drum frame 12, each developer cartridge 13 is positioned between the inner surface of the first frame 12a and the inner surface of the second frame 12b in the first direction. Further, in a state in which a plurality of developer cartridges 13 are attached to the drum frame 12, the respective developer cartridges 13 are spaced apart in the second direction between the third frame 12c and the fourth frame 12d.

The cover 14 covers a portion of the circuit section 100 (see FIG. 5) located on the outer surface of the fourth frame 12d. The cover 14 will be detailed later.

<3. Schematic Configuration of Circuit Section>
Next, a schematic configuration of the circuit section 100 will be described.

FIG. 5 is a perspective view of the circuit section 100. FIG. The circuit section 100 has a relay board 101 , a drum memory 102 , a plurality of first connectors 103 , second connectors 104 , first wires 105 , second wires 106 and a thermistor 107 .

The drum memory 102 is a storage medium from which information can be read and written. The second connector 104 is electrically connected to the control section 3 of the image forming apparatus main body 2 when the drum cartridge 10 is attached to the main body frame 99 of the image forming apparatus main body 2 . Each of the plurality of first connectors 103 is electrically connected to the toner memory 15 when the developing cartridge 13 is attached to the drum cartridge 10 . In this embodiment, since the number of developing cartridges 13 attached to the drum cartridge 10 is four, the number of first connectors 103 is also four.

The first wires 105 electrically connect the relay board 101 and each of the plurality of first connectors 103 . A second wire 106 electrically connects the relay board 101 and the second connector 104 .

Each of the developer cartridges 13 has a toner circuit board (not shown), a toner memory 15 (see FIG. 1), and a toner-side connector 16 (see FIG. 3). The toner memory 15 is a storage medium from which information can be read and written. The toner-side connector 16 contacts and is electrically connected to the first connector 103 of the drum cartridge 10 when the developing cartridge 13 is attached to the drum cartridge 10 .

With such a configuration, when the developing cartridges 13 are attached to the drum cartridges 10, the toner circuit board of each developing cartridge 13 and the relay board 101 are electrically connected. Further, when the drum cartridge 10 having a plurality of developing cartridges 13 attached thereto is attached to the image forming apparatus main body 2, the controller 3 (see FIG. 1) of the image forming apparatus main body 2 and the relay board 101 are electrically connected. connected. As a result, the toner circuit board of each developing cartridge 13 and the controller 3 of the image forming apparatus main body 2 are electrically connected via the relay board 101 . That is, the relay board 101 relays exchange of information between the toner circuit board of each developing cartridge 13 and the controller 3 of the image forming apparatus main body 2 .

<4. Detailed Configuration of Circuit Section>
Next, the circuit section 100 will be described in more detail. As shown in FIG. 5 , the relay board 101 is a circuit board electrically connected to a plurality of first connectors 103 and second connectors 104 . As shown in FIG. 4, the relay board 101 is positioned on the outer surface of the other end of the fourth frame 12d of the drum frame 12 in the first direction.

FIG. 6 is a cross-sectional view of part of the drum cartridge 10. As shown in FIG. Specifically, FIG. 6 is a cross-sectional view when the drum cartridge 10 is cut perpendicular to the first direction. As shown in FIG. 6, the relay board 101 is inclined with respect to the second direction. The outer surface of the other end in the first direction of the fourth frame 12 d of the drum frame 12 is also inclined along the relay board 101 . Specifically, the outer surface of the other end of the fourth frame 12d in the first direction is inclined so as to approach the third frame 12c toward one side in the third direction. The relay board 101 inclines along the fourth frame 12d. Incidentally, as shown in FIGS. 3 and 6 , the relay board 101 is normally covered with a cover 14 .

The relay board 101 is a board that electrically relays information between the first connector 103 and the second connector 104 . As shown in FIG. 5 , the relay board 101 and the first connector 103 are electrically connected via the first wire 105 . Also, the relay board 101 and the second connector 104 are electrically connected via the second wire 106 . The first wire 105 and the second wire 106 are, for example, wire harnesses including a plurality of conductors.

FIG. 7 is a plan view of the relay substrate 101. FIG. As shown in FIG. 7, the drum memory 102 is located on the relay board 101 . More specifically, the drum memory 102 is positioned on the outer surface of the other end of the relay substrate 101 in the second direction. The drum memory 102 stores various information regarding the drum cartridge 10 . For example, the drum memory 102 stores at least one of information for identifying the drum cartridge 10 and information indicating characteristics of the drum cartridge 10 . The information for identifying the drum cartridge 10 is, for example, at least one of a manufacturing serial number of the drum cartridge 10 and an identification code indicating that it is a genuine product. The information indicating the characteristics of the drum cartridge 10 includes, for example, the compatible model of the drum cartridge 10, the specifications of the drum cartridge 10, the service life of the photosensitive drum 11, the charging characteristics of the photosensitive drum 11, information indicating whether it is a new product, and the photosensitive drum. It is at least one of the number of rotations of the body drum 11, the charging time of the photosensitive drum 11, the number of printed sheets, and the error history.

The first connector 103 is a portion that is electrically connected to the toner connector 16 (see FIG. 3) when the developer cartridge 13 is attached to the slot 130 of the drum frame 12 . Each first connector 103 is located at the other end of the slot 130 in the first direction. Each first connector 103 is fixed to the surface of the drum frame 12, for example. However, the first connector 103 may be immovably fixed to the drum frame 12 or may be held slightly movably.

A first wire 105 connecting the relay board 101 and the first connector 103 is located on the inner surface of the second frame 12b of the drum frame 12 . The first wire 105 extends in the second direction.

The second connector 104 is a body-side connector (not shown) positioned inside the image forming apparatus main body 2 when the drum cartridge 10 with the developing cartridge 13 attached thereto is attached to the main body frame 99 of the image forming apparatus main body 2 . It is the part that is electrically connected to the The body-side connector is electrically connected to the controller 3 . The second connector 104 is located on the outer surface of one end of the fourth frame 12d of the drum frame 12 in the first direction.

A second wire 106 connecting the relay board 101 and the second connector 104 extends in the first direction. The second wire 106 has a first portion 106a and a second portion 106b. The first portion 106 a of the second wire 106 is closer to the relay board 101 than the second portion 106 b and is located on the outer surface of the fourth frame 12 d of the drum frame 12 . The second portion 106b is a portion of the second wire 106 other than the first portion 106a, and is positioned on the inner surface of the fourth frame 12d of the drum frame 12. As shown in FIG.

As shown in FIG. 7, the thermistor 107 is located on the relay board 101 . More specifically, thermistor 107 is positioned on the outer surface of the other end of relay board 101 in the second direction. The thermistor 107 is a sensor that detects the temperature of the atmosphere inside the image forming apparatus main body 2 . As described above, the relay board 101 is normally covered with the cover 14 . Therefore, toner is less likely to adhere to the relay board 101 and the thermistor 107 .

More specifically, the relay board 101 is provided with a connector 111 connected to one end of the first wire 105 and a connector 112 connected to one end of the second wire 106 on the outer surface of the relay board 101 . ing. A first wire 105 extending from the connector 111 has a first portion positioned in the inner space of the cover 14 and a second portion positioned outside the inner space of the cover 14 . A portion of the first portion of the first wire 105 is bent. A second portion of the first wire 105 extends in a second direction. Also, the second wire 106 extending from the connector 112 has a first portion positioned in the inner space of the cover 14 and a second portion positioned outside the inner space of the cover 14 . A first portion of the second wire 106 bends in the interior space of the cover 14 . A second portion of the second wire 106 extends in a second direction.

Here, the outer surface of the other end of the relay board 102 in the second direction is exposed to the internal space of the cover 14 . Since the relay board 102 is inclined with respect to the second direction, the relay board 102 is located between the inner surface of the cover 14 and the outer surface of the other end of the relay board 102 in the second direction. A wider space (internal space) is ensured compared to the case of a configuration that is perpendicular to two directions. Therefore, the first portion of the first wire 105 and the first portion of the second wire 106 are naturally bent in the desired direction.

FIG. 8 is a perspective view of the cover. The cover 14 has ribs 14a that contact the first portion of the second wire 106 when attached to the fourth frame 12d. A first portion of the second wire 106 is bent in a desired direction by being guided by the ribs 14a of the cover 14 . This reduces the risk of the first portion of the second wire 106 being caught in the gap between the cover 14 and the fourth frame 12d.

As described above, the second connector 104 is positioned at one end of the fourth frame 12d in the first direction, and the relay board 101 is positioned at the other end of the fourth frame 12d in the first direction. In other words, the second connector 104 and the relay board 101 are not positioned on the outer surface of the central portion of the fourth frame 12d in the first direction. In this embodiment, the handle 19 used when the user grips the drum cartridge 10 is positioned at the center of the fourth frame 12d in the first direction. Handle 19 is positioned between second connector 104 and relay board 101 in the first direction. Thus, the second connector 104, the relay board 101, and the handle 19 are positioned on the outer surface of the fourth frame 12d.

<5. Summary>
As described above, the drum cartridge 10 of this embodiment includes the photosensitive drum 11, the drum memory 102, the drum frame 12, the first connector 103, the relay board 101, and the second connector 104. . Photoreceptor drum 11 and slot 130 are positioned between third frame 12c and fourth frame 12d of drum frame 12 in the second direction. The relay board 101 is positioned on the outer surface of the fourth frame 12 d of the drum frame 12 . This makes it difficult for the toner discharged from the developing cartridge 13 to adhere to the relay board 101 .

Further, in the drum cartridge 10 of the present embodiment, the photosensitive drum 11 faces the developing roller 18 when the developing cartridge 13 is mounted in the slot 130 . When the developer cartridge 13 is installed in the slot 130, the fourth frame 12d is positioned between the relay board 101 and the photosensitive drum 11 and the developer roller 18 in the second direction. As a result, it is possible to prevent the relay board 101 from being soiled by the toner leaked from the developing roller 18 .

Further, the drum cartridge 10 of this embodiment has a handle 19 . This makes it easier for the user to grip the central portion of the outer surface of the fourth frame 12d in the first direction.

Further, in the drum cartridge 10 of this embodiment, the drum frame 12 has a cover 14 that covers the relay board 101 . This makes it difficult for toner to adhere to the relay board 101 .

Further, in the drum cartridge 10 of the present embodiment, the relay board 101 is inclined with respect to the second direction. As a result, wiring such as wires connected to the relay board 101 can be bent in a desired direction without difficulty. Also, the area of the relay substrate 101 can be increased.

<6. Variation>
Although one embodiment of the present disclosure has been described above, the present disclosure is not limited to the above embodiment. Some modifications are briefly described below.

In the above embodiment, the drum memory 102 and the thermistor 107 are separately located on the relay board 101 . Alternatively, however, a thermistor 107 may be located on the drum memory 102 .

The thermistor 107 may be omitted.

The relay board 101 may be positioned perpendicular to the second direction.

Further, the detailed shape of each part constituting the drum cartridge and the image forming apparatus may be different from the shape shown in each drawing of the present application. Also, the elements appearing in the above embodiments and modifications may be appropriately combined as long as there is no contradiction.

Reference Signs List 1 image forming apparatus 2 image forming apparatus main body 3 control unit 10 drum cartridge 11 photoreceptor drum 12 drum frame 12a first frame 12b second frame 12c third frame 12d fourth frame 13 developing cartridge 14 cover 14a rib 15 toner memory 16 toner side connector 19 handle 21 photosensitive drum 100 circuit section 101 relay board 102 drum memory 103 first connector 104 second connector 105 first wire 106 second wire 107 thermistor 130 slot

Claims (15)

a photoreceptor drum rotatable about a drum shaft extending in a first direction;
a drum memory that stores information about the photosensitive drum;
A drum frame having a slot capable of mounting a developing cartridge having a toner memory for storing information about the developing cartridge,
a first frame located at one end of the photosensitive drum in the first direction;
a second frame located at the other end of the photosensitive drum in the first direction;
a third frame connecting one end of the first frame in a second direction intersecting the first direction and one end of the second frame in the second direction;
a fourth frame connecting the other end of the first frame in the second direction and the other end of the second frame in the second direction;
a drum frame having
a first connector positioned on the second frame, the first connector being electrically connectable to the toner memory of the developing cartridge in a state where the developing cartridge is mounted on the drum frame;
a relay board electrically connectable to the first connector and the drum memory;
a second connector electrically connectable to a body connector of the image forming apparatus in a state where the drum cartridge is attached to the body frame of the image forming apparatus, the second connector being positioned on the fourth frame; a second connector electrically connectable to the first connector via the relay substrate;
A drum cartridge comprising
the photosensitive drum and the slot are positioned between the third frame and the fourth frame in the second direction;
The relay board is positioned on the outer surface of the fourth frame ,
A drum cartridge , further comprising a thermistor positioned on the relay board . The drum cartridge according to claim 1,
In a state in which the developing cartridge having the developing roller is mounted in the slot, the photosensitive drum faces the developing roller,
The fourth frame is positioned between the relay board and the photosensitive drum and the developing roller in the second direction when the developing cartridge is mounted in the slot. drum cartridge. The drum cartridge according to claim 1 or 2,
A drum cartridge, wherein the drum frame rotatably holds the plurality of photosensitive drums arranged in the second direction. The drum cartridge according to claim 1 or 2,
A drum cartridge, wherein the drum frame is mountable with a plurality of the developing cartridges corresponding to the plurality of the photosensitive drums. A drum cartridge according to claim 4,
A drum cartridge comprising a plurality of said first connectors corresponding to a plurality of said developing cartridges. The drum cartridge according to any one of claims 1 to 5,
The third frame is positioned upstream in a mounting direction of the drum cartridge with respect to the body frame of the image forming apparatus,
A drum cartridge, wherein the fourth frame is positioned downstream in a mounting direction of the drum cartridge with respect to the body frame of the image forming apparatus. The drum cartridge according to any one of claims 1 to 6,
the second connector is positioned at one end of the outer surface of the fourth frame in the first direction;
The drum cartridge, wherein the relay board is positioned at the other end of the outer surface of the fourth frame in the first direction. A drum cartridge according to claim 7,
The drum cartridge, further comprising a handle positioned on the fourth frame, the handle being positioned between the second connector and the relay board in the first direction. The drum cartridge according to any one of claims 1 to 8,
a first wire connecting the relay board and the first connector, the first wire being positioned on the second frame and extending in the second direction;
a second wire connecting the relay board and the second connector, the second wire being positioned on the fourth frame and extending in the first direction;
A drum cartridge further comprising: A drum cartridge according to claim 9,
The drum cartridge, wherein the first wire is positioned on the inner surface of the second frame. 11. The drum cartridge according to claim 9 or 10,
The second wire is
a first portion positioned on the outer surface of the fourth frame;
a second portion located on the inner surface of the fourth frame;
A drum cartridge comprising: The drum cartridge according to any one of claims 1 to 11,
The drum cartridge, wherein the drum frame has a cover that covers the relay board. The drum cartridge according to any one of claims 1 to 12,
The drum cartridge, wherein the drum memory is positioned on the relay board. A drum cartridge according to any one of claims 1 to 13 ,
A drum cartridge, wherein the thermistor is positioned on the drum memory. A drum cartridge according to any one of claims 1 to 14 ,
The drum cartridge, wherein the relay board is inclined with respect to the second direction.

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