Developing cartridge

Abstract

To provide a structure in which electrical contact surfaces of a coupling, a detection gear and a storage medium are appropriately arranged in a developing cartridge in order to miniaturize an image forming apparatus.SOLUTION: The developing cartridge includes a housing 10 capable of storing developer and extending in a first direction. Further, the developing cartridge 1 includes the coupling 41 positioned at the one side of the casing 10 in the first direction, the detection gear 52 positioned at the other side of the casing 10 in the first direction, and the storage medium 61 having the electrical contact surface 611 positioned at the one side of the casing 10 in the first direction. The detection gear 52 is rotatable about a rotation axis 85 extending in the first direction. The coupling 41 is rotatable about a rotation axis 83 extending in the first direction. By disposing the detection gear 52, the coupling 41, and the electric contact surface 611 on the opposite side of the casing 10 in the first direction, the end surface of the casing 10 in the first direction can be reduced.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a developing cartridge.

Background Art

[0002] Conventionally, developing cartridges detachably mountable to image forming apparatuses such as laser printers are known. A conventional developing cartridge is described, for example, in Patent Document 1. The developing cartridge accommodates toner, which is a developer. Such a developing cartridge has an electrode that receives electric power from the image forming apparatus. The electrode supplies electric power received from the image forming apparatus to the developing roller. The developing cartridge also has a coupling. The coupling receives a driving force from the image forming apparatus. Furthermore, the developing cartridge described in Patent Document 1 has a detection gear. The detection gear is a gear for notifying the image forming apparatus whether the developing cartridge is new, or notifying the specification of the developing cartridge. After the developing cartridge is mounted in the image forming apparatus, when the coupling receives a driving force from the image forming apparatus, the detection gear rotates.

[0003] Further, the developing cartridge described in Patent Document 2 includes a storage medium. The storage medium can record information such as the number of printed sheets, for example. In the developing cartridge described in Patent Document 2, a cartridge-side contact portion of an IC chip is provided on an abutting portion of the detection gear.

Prior Art Literature

Patent Literature

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problem to be Solved by the Invention

[0005] In the developing cartridge described in Patent Document 2, the coupling, detection gear, and IC chip are located on one of the first sides of the developing cartridge housing. In this case, since many components are arranged on the first side, the first side becomes larger. That is, the developing cartridge becomes larger. On the other hand, the inner surface of the image forming apparatus corresponding to the first side of the developing cartridge is provided with a drive member that sends driving force to the coupling, an actuator that detects the detection gear, and a contact part that reads information from the IC chip. Therefore, the inner surface of the image forming apparatus corresponding to the first side becomes complex, which may lead to the image forming apparatus becoming larger.

[0006] The objective of the present invention is to provide a structure in which the electrical contact surfaces of the coupling, detection gear, and storage medium are appropriately arranged in the developing cartridge in order to miniaturize the image forming apparatus. [Means for solving the problem]

[0007] To solve the above problems, the first invention of the present application is a developing cartridge comprising: a housing capable of containing a developer, the housing extending in a first direction; a coupling located on one side of the housing in the first direction, the coupling rotatable about a first axis extending in the first direction; a detection gear located on the other side of the housing in the first direction, the detection gear rotatable about a second axis extending in the first direction; and a storage medium having an electrical contact surface, the storage medium having the electrical contact surface located on one side of the housing in the first direction.

[0008] The second invention of this application is a developing cartridge of the first invention, characterized in that the storage medium is located on one side of the housing in the first direction.

[0009] The third invention of this application is a developing cartridge according to the first or second invention, characterized in that the detection gear is rotatable in accordance with the rotation of the coupling.

[0010] The fourth invention of this application is a developing cartridge of the third invention, further comprising a first shaft extending in the first direction, the first shaft being rotatable in accordance with the rotation of the coupling, and the detection gear being rotatable in accordance with the rotation of the first shaft.

[0011] The fifth invention of this application is a developing cartridge of the fourth invention, further comprising an agitator including the first shaft, the agitator being rotatable together with the first shaft in accordance with the rotation of the coupling, and the detection gear being rotatable in accordance with the rotation of the agitator.

[0012] The sixth invention of this application is a developing cartridge according to the fifth invention, characterized in that the detection gear is located on one side of the first shaft in a second direction perpendicular to the first direction, and the coupling is located on one side of the first shaft in the second direction.

[0013] The seventh invention of this application is a developing cartridge according to the fifth or sixth invention, wherein the coupling includes a coupling gear rotatable together with the coupling, and the agitator is a first agitator gear mounted on the first shaft, further including a first agitator gear located on one side of the housing in the first direction and rotatable together with the first shaft, characterized in that the coupling gear and the first agitator gear mesh together.

[0014] The eighth invention of this application is a developing cartridge according to the fifth or sixth invention, further comprising a first idler gear located on one side of the housing in the first direction, the coupling including a coupling gear that is rotatable with the coupling and meshes with the first idler gear, and the agitator including a first agitator gear mounted on the first shaft, which is located on one side of the housing in the first direction, rotatable with the first shaft and meshes with the first idler gear.

[0015] The ninth invention of this application is a developing cartridge according to any of the fifth to eighth inventions, wherein the agitator is a second agitator gear mounted on the first shaft, further comprising a second agitator gear located on the other side of the housing in the first direction and rotatable together with the first shaft, wherein the second agitator gear and the detection gear mesh together.

[0016] The tenth invention of this application is a developing cartridge according to any of the fifth to eighth inventions, further comprising a second idler gear located on the other side of the housing in the first direction and meshing with the detection gear, wherein the agitator is a second agitator gear mounted on the first shaft, located on the other side of the housing in the first direction, rotatable together with the first shaft, and meshing with the second idler gear, and further comprising a second agitator gear.

[0017] The eleventh invention of this application is a developing cartridge according to any of the first to tenth inventions, further comprising a developing roller rotatable about a rotation axis extending in the first direction, the developing roller having a roller shaft extending in the first direction, and an electrode electrically connected to the roller shaft, wherein the electrode is located on the other side of the housing in the first direction.

[0018] The twelfth invention of this application is a developing cartridge according to the eleventh invention, wherein the electrode includes a gear shaft extending in the first direction, the detection gear is rotatable with respect to the gear shaft, and the detection gear covers a portion of the circumferential surface of the gear shaft.

[0019] The thirteenth invention of this application is a developing cartridge according to any of the first to twelfth inventions, further comprising a gear cover that covers a part of the detection gear, the gear cover located on the other side of the housing in the first direction.

[0020] A fourteenth aspect of the present application provides the developing cartridge according to any one of the first to sixth aspects, wherein the housing has a first outer surface located on one side of the housing in the first direction, and a second outer surface located on the other side of the housing in the first direction, and the electrical contact surface is located on the first outer surface.

[0021] A fifteenth aspect of the present application provides the developing cartridge according to the fourteenth aspect, wherein the storage medium is located on the first outer surface.

[0022] A sixteenth aspect of the present application provides the developing cartridge according to the fourteenth or fifteenth aspect, wherein the detection gear is located on the second outer surface.

[0023] A seventeenth aspect of the present application provides the developing cartridge according to the sixteenth aspect, further comprising a second shaft located on the second outer surface, the second shaft extending in the first direction along the second axis, wherein the detection gear is rotatable about the second shaft.

[0024] An eighteenth aspect of the present application provides the developing cartridge according to the seventeenth aspect, wherein the second shaft extends from the second outer surface of the housing.

[0025] A nineteenth aspect of the present application provides the developing cartridge according to the seventeenth aspect, wherein the housing further comprises a through hole penetrating the second outer surface, and a cap attached to the through hole, and the second shaft extends from the cap.

[0026] A twentieth aspect of the present application provides the developing cartridge according to any one of the seventeenth to nineteenth aspects, further comprising: a developing roller rotatable about a rotation shaft extending in the first direction, the developing roller having a roller shaft extending in the first direction; and an electrode electrically connected to the roller shaft, wherein the electrode is located on the other side of the housing in the first direction.

[0027] The 21st invention of this application is a developing cartridge according to the 20th invention, wherein the electrode includes a gear shaft extending in the first direction, the gear shaft is the second shaft, the detection gear is rotatable with respect to the gear shaft, and the detection gear covers a portion of the circumferential surface of the gear shaft.

[0028] The 22nd invention of this application is a developing cartridge according to any of the 16th to 21st inventions, characterized in that it further comprises a gear cover that covers a part of the detection gear, and the gear cover is located on the second outer surface.

[0029] The 23rd invention of this application is a developing cartridge according to any of the 14th to 22nd inventions, characterized in that the coupling is located on the first outer surface.

[0030] The 24th invention of this application is a developing cartridge according to the 23rd invention, wherein the coupling includes a coupling gear rotatable together with the coupling, and the agitator is a first agitator gear mounted on the first shaft, further including a first agitator gear located on the first outer surface and rotatable together with the first shaft, characterized in that the coupling gear and the first agitator gear mesh together.

[0031] The 25th invention of this application is a developing cartridge according to the 23rd invention, further comprising a first idler gear located on the first outer surface, the coupling including a coupling gear that is rotatable with the coupling and meshes with the first idler gear, and the agitator including a first agitator gear mounted on the first shaft, which is located on the first outer surface, rotatable with the first shaft and meshes with the first idler gear.

[0032] The 26th invention of this application is a developing cartridge according to any of the 23rd to 25th inventions, wherein the agitator is a second agitator gear mounted on the first shaft, further comprising a second agitator gear located on the second outer surface and rotatable together with the first shaft, wherein the second agitator gear and the detection gear mesh together.

[0033] The 27th invention of this application is a developing cartridge according to any of the 23rd to 25th inventions, further comprising a second idler gear located on the second outer surface and meshing with the detection gear, wherein the agitator further comprises a second agitator gear fixed to the first shaft, located on the second outer surface, rotatable with the first shaft, and meshing with the second idler gear.

[0034] The 28th invention of this application is a developing cartridge according to the 24th or 25th invention, wherein the first shaft includes a first end in the first direction and a second end separated from the first end in the first direction, the first end penetrates the first outer surface, and the first agitator gear is mounted on the first end.

[0035] The 29th invention of this application is a developing cartridge according to the 26th or 27th invention, wherein the first shaft includes a first end in the first direction and a second end separated from the first end in the first direction, the second end penetrates the first outer surface, and the second agitator gear is mounted on the second end.

[0036] The 30th invention of this application is a developing cartridge according to any of the 1st to 29th inventions, wherein the coupling has a recess or protrusion for receiving a driving force.

[0037] The 31st invention of this application is a developing cartridge according to any of the 1st to 30th inventions, characterized in that the detection gear has a shape that represents information relating to the specifications of the developing cartridge.

[0038] The 32nd invention of this application is a developing cartridge according to the 31st invention, characterized in that the specification is the number of pages that can be printed using the developing cartridge.

[0039] The 33rd invention of this application is a developing cartridge according to any of the 1st to 30th inventions, characterized in that the detection gear is rotatable from a first position indicating that the developing cartridge is unused to a second position indicating that the developing cartridge is used.

[0040] The 34th invention of this application is a developing cartridge according to any of the 1st to 33rd inventions, characterized in that the detection gear includes a plurality of teeth, and the plurality of teeth are arranged in a part of the periphery of the detection gear.

[0041] The 35th invention of this application is a developing cartridge according to any of the 1st to 34th inventions, characterized in that the detection gear includes a projection extending in the first direction.

[0042] The 36th invention of this application is a developing cartridge according to the 35th invention, characterized in that the detection gear includes a plurality of the aforementioned protrusions.

[0043] The 37th invention of this application is a developing cartridge according to any of the 1st to 36th inventions, wherein the storage medium stores information relating to the developing cartridge.

[0044] The 38th invention of this application is a developing cartridge according to any of the 1st to 37th inventions, characterized in that the storage medium is located on one side of the housing in the first direction, and the storage medium has the electrical contact surface. [Effects of the Invention]

[0045] According to the first to thirty-eighth inventions of this application, in a developing cartridge, the coupling and the electrical contact surface of the storage medium are located on one side of the housing in the first direction, and the detection gear is located on the other side of the housing in the first direction, so that the coupling, the detection gear and the electrical contact surface of the storage medium can be efficiently arranged.

[0046] Furthermore, according to the second invention of the present application, since the storage medium is located on one side of the housing in the first direction, the coupling, the detection gear, the electrical contact surface of the storage medium, and the storage medium can be efficiently arranged.

[0047] Furthermore, according to the 20th invention of this application, since the electrode is located on the other side of the housing in the first direction, the coupling, the sensing gear, the electrical contact surface of the storage medium, and the electrode can be efficiently arranged. Moreover, since the electrical contact surface is located on one side of the housing in the first direction and the electrode is located on the other side of the housing in the first direction, electrical interference between the electrode and the electrical contact surface can be reduced.

[0048] Furthermore, according to the 21st invention of this application, the detection gear is rotatable with respect to the gear shaft that includes the electrode. Since a portion of the electrode can be used as the gear shaft on which the detection gear is rotatable, the detection gear and the electrode can be efficiently arranged on the other side of the housing in the first direction.

[0049] Furthermore, according to the 38th invention of this application, since the storage medium has an electrical contact surface, the storage medium and the electrical contact surface can be efficiently arranged on one side of the housing in the first direction. [Brief explanation of the drawing]

[0050] [Figure 1] This is a perspective view of a developing cartridge. [Figure 2] This is a perspective view of a developing cartridge. [Figure 3] This is a perspective view of a developing cartridge. [Figure 4] This is a perspective view of a developing cartridge. [Figure 5]This is a perspective view of a developing cartridge. [Figure 6] This is a conceptual diagram of a developing cartridge. [Figure 7] This is a perspective view of the modified developing cartridge and drum cartridge. [Figure 8] This diagram shows the modified developing cartridge mounted on the drum cartridge, and how the drum cartridge is mounted on the image forming apparatus. [Modes for carrying out the invention]

[0051] Preferred embodiments of the present invention will be described below with reference to the drawings. In the following embodiments, the direction in which the rotation axis of the developing roller extends will be referred to as the "first direction". The direction perpendicular to the first direction and parallel to the straight line connecting the agitator shaft 21 of the agitator 20 and the roller shaft 32 of the developing roller 30 will be referred to as the "second direction".

[0052] <1. Overall configuration of the developing cartridge> Figures 1 to 5 are perspective views of a developing cartridge 1, which is an example of the present invention. Figure 6 is a schematic diagram of the developing cartridge 1 showing the positional relationship of each gear. This developing cartridge 1 is used in an electrophotographic image forming apparatus (for example, a laser printer or an LED printer) and is a unit that supplies a developer (for example, toner) to a photosensitive drum. As shown in Figure 1, the developing cartridge 1 of this embodiment is mounted on a drawer unit 90 of the image forming apparatus.

[0053] In this embodiment, four developing cartridges 1 are mounted in one drawer unit 90. The four developing cartridges are capable of containing developers of different colors (for example, cyan, magenta, yellow, and black). The developers are, for example, toner. The drawer unit 90 has four cartridge holders 91. Each cartridge holder 91 is provided with a photosensitive drum.

[0054] The drawer unit 90 can be pulled out from the image forming apparatus, and the developing cartridge 1 can be attached to each of the four cartridge holding sections 91 of the drawer unit 90. The developing cartridge 1 can also be removed from the drawer unit 90 by pulling it out from the image forming apparatus.

[0055] As shown in Figures 2 to 5, the developing cartridge 1 of this embodiment includes a casing 10, an agitator 20, a developing roller 30, a first gear section 40, a second gear section 50, and an IC chip assembly 60.

[0056] The casing 10 is a housing capable of containing a developer (e.g., toner) for electrophotographic printing. The casing 10 has a first outer surface 11 and a second outer surface 12. The first outer surface 11 is the outer surface of one side of the casing 10 in a first direction. The second outer surface 12 is the outer surface of the other side of the casing 10 in a first direction. The first outer surface and the second outer surface are separated in a first direction. The first gear portion 40 and the IC chip assembly 60 are located on the first outer surface 11. The second gear portion 50 is located on the second outer surface 12. The casing 10 extends in a first direction between the first outer surface 11 and the second outer surface 12. Inside the casing 10 is a toner chamber 13 for containing toner. The first direction is the direction of extension of the casing 10 and the developing roller 30.

[0057] The agitator 20 is a stirring device extending in a first direction. The agitator 20 has an agitator shaft 21 and stirring blades 22. The agitator shaft 21 extends along a rotation axis 81 that extends in a first direction. The agitator shaft 21 is columnar in shape and extends along the first direction. The agitator shaft 21 constitutes the "first shaft". The stirring blades 22 spread radially outward from the agitator shaft 21. The stirring blades 22 are located inside the toner chamber 13 of the casing 10.

[0058] As shown in Figure 4, the agitator shaft 21 has a first end 211 and a second end (not shown). The first end 211 is one end of the agitator shaft 21 in a first direction. The first end 211 penetrates the first outer surface 11 of the casing 10. The first agitator gear 44, which will be described later, is mounted on the first end 211. Specifically, the first agitator gear 44 is fixed to the first end 211 so as not to move relative to it. The first agitator gear 44 is located on the first outer surface 11.

[0059] The second end is the other end of the agitator shaft 21 in the first direction. The second end penetrates the second outer surface 12 of the casing 10. As shown in Figure 5, a second agitator gear 51, which will be described later, is mounted on the second end. Specifically, the second agitator gear 51 is fixed so as not to move relative to the second end. The second agitator gear 51 is located on the second outer surface 12.

[0060] With the above configuration, the agitator shaft 21 and the stirring blades 22 rotate together with the first agitator gear 44 and the second agitator gear 51. When the agitator 20 rotates, the stirring blades 22 rotate, and the toner in the toner chamber 13 is stirred.

[0061] The developing roller 30 is a roller that can rotate around a rotation axis 82 extending in a first direction. The developing roller 30 of this embodiment has a roller body 31 and a roller shaft 32. The roller body 31 is a cylindrical member extending in a first direction. For example, elastic rubber is used as the material for the roller body 31. The roller shaft 32 is a substantially cylindrical member that penetrates the roller body 31 in a first direction. For the material for the roller shaft 32, metal or conductive resin is used. The roller body 31 is fixed to the roller shaft 32 so that it cannot rotate relative to it. Therefore, when the roller shaft 22 rotates, the roller body 21 also rotates together with the roller shaft 22.

[0062] Note that the roller shaft 22 does not necessarily have to penetrate the roller body 21 in the axial direction. For example, a pair of roller shafts 22 may extend axially from both ends of the roller body 21.

[0063] One end of the roller shaft 32 in the first direction is fixed to the developing gear 42, which will be described later, so that it cannot rotate relative to it. Therefore, when the developing gear 42 rotates, the roller shaft 32 also rotates, and the roller body 31 rotates together with the roller shaft 32.

[0064] Here, the second direction is defined as the direction parallel to the line connecting the agitator shaft 21 and the roller shaft 32 at the same position in the first direction. In the second direction, the roller shaft 32 is located on one side of the agitator shaft 21. Also, in the second direction, the agitator shaft 21 is located on the other side of the roller shaft 32. Note that the second direction is perpendicular to the first direction.

[0065] The casing 10 has an opening 14. The opening 14 connects the toner chamber 13 to the outside. The opening 14 is located at one end of the casing 10 in the second direction. The developing roller 30 is located at the opening 14. That is, the developing roller 30 is located near one end of the casing 10 in the second direction.

[0066] When the image forming apparatus is in operation, toner is supplied from the toner chamber 13 inside the casing 10 of the developing cartridge 1 to the outer surface of the developing roller 30 via a supply roller (not shown). At this time, the toner is triboelectrically charged between the supply roller and the developing roller 30. Meanwhile, a bias voltage is applied to the roller shaft 32 of the developing roller 30 by power supplied from the image forming apparatus. As a result, the electrostatic force between the roller shaft 32 and the toner attracts the toner to the outer surface of the roller body 31.

[0067] Furthermore, the developing cartridge 1 has a layer thickness regulating blade (not shown in the figure). The layer thickness regulating blade maintains a constant thickness of toner on the outer surface of the roller body 31. Subsequently, the toner on the outer surface of the roller body 31 is supplied to the photosensitive drum provided in the drawer unit 90. At this time, the toner moves from the roller body 31 to the photosensitive drum in accordance with the electrostatic latent image formed on the outer surface of the photosensitive drum. As a result, the electrostatic latent image is made visible on the outer surface of the photosensitive drum.

[0068] The first gear section 40 is located on one side of the casing 10 in the first direction. That is, the first gear section 40 is located on the first outer surface 11. Figure 4 is a perspective view of the developing cartridge 1 with the first gear section 40 disassembled. As shown in Figure 4, the first gear section 40 includes a coupling 41, a developing gear 42, an idler gear 43, a first agitator gear 44, and a first gear cover 45. Therefore, the coupling 41, developing gear 42, idler gear 43, and first agitator gear 44 are located on the first outer surface 11. Note that in Figure 4, the multiple gear teeth of each gear are not shown.

[0069] The coupling 41 is the part that first receives the driving force supplied from the image forming apparatus. The coupling 41 is capable of rotating around a rotation axis 83 that extends in a first direction. The rotation axis 83, which is the rotation center of the coupling 41, constitutes the "first axis". The coupling 41 has a coupling portion 411 and a coupling gear 412. The coupling portion 411 and the coupling gear 412 are formed, for example, from a single piece of resin.

[0070] The coupling portion 411 is provided with a fastening hole 413 that is recessed in the first direction. The fastening hole 413 is a recess for receiving driving force from the image forming apparatus. Alternatively, the coupling portion 411 may have a protrusion for receiving driving force from the image forming apparatus instead of the fastening hole 413. Furthermore, the outer circumference of the coupling gear 412 is provided with multiple gear teeth at equal intervals along its entire circumference.

[0071] When the drawer unit 90 with the developing cartridge 1 installed is housed in the image forming apparatus, the drive shaft of the image forming apparatus is inserted into the fastening hole 413 of the coupling part 411. This connects the drive shaft and the coupling part 411 so that they cannot rotate relative to each other. Therefore, when the drive shaft rotates, the coupling part 411 rotates, and the coupling gear 412 rotates together with the coupling part 411.

[0072] The developing gear 42 is a gear for rotating the developing roller 30. The developing gear 42 is capable of rotating around a rotating shaft 82 that extends in a first direction. Multiple gear teeth are provided at equal intervals around the outer circumference of the developing gear 42. At least some of the gear teeth of the coupling gear 412 and at least some of the gear teeth of the developing gear 42 mesh with each other. In addition, the developing gear 42 is fixed to one end of the roller shaft 32 of the developing roller 30 in the first direction so as not to rotate relative to it. Therefore, when the coupling gear 412 rotates, the developing gear 42 rotates, and the developing roller 30 rotates together with the developing gear 42.

[0073] The idler gear 43 is a gear that transmits the rotation of the coupling gear 412 to the first agitator gear 44. The idler gear 43 constitutes the "first idler gear". The idler gear 43 is capable of rotating around a rotation axis 84 that extends in a first direction. The idler gear 43 has a large-diameter gear section 431 and a small-diameter gear section 432 (see Figure 6) arranged in a first direction. The small-diameter gear section 432 is located on the other side of the large-diameter gear section 431 in the first direction. That is, the small-diameter gear section 432 is located between the large-diameter gear section 431 and the first outer surface 11 of the casing 10. Therefore, the large-diameter gear section 431 is located further from the first outer surface 11 than the small-diameter gear section 432. The diameter of the small-diameter gear section 432 is smaller than the diameter of the large-diameter gear section 431. In other words, the diameter of the tip circle of the small-diameter gear portion 432 is smaller than the diameter of the tip circle of the large-diameter gear portion 431. The large-diameter gear portion 431 and the small-diameter gear portion 432 are formed, for example, from a single piece of resin.

[0074] The outer circumferences of the large-diameter gear section 431 and the small-diameter gear section 432 are each provided with multiple gear teeth at equal intervals along their entire circumference. The number of gear teeth on the small-diameter gear section 432 is less than the number of gear teeth on the large-diameter gear section 431. At least some of the gear teeth of the coupling gear 412 mesh with at least some of the gear teeth of the large-diameter gear section 431. Also, at least some of the gear teeth of the small-diameter gear section 432 mesh with at least some of the gear teeth of the first agitator gear 44. When the coupling gear 412 rotates, the large-diameter gear section 431 rotates, and the small-diameter gear section 432 rotates together with the large-diameter gear section 431. As the small-diameter gear section 432 rotates, the first agitator gear 44 also rotates.

[0075] The first agitator gear 44 is a gear for rotating the agitator 20 in the toner chamber 13. The first agitator gear 44 is capable of rotating around a rotation axis 81 that extends in the first direction. Multiple gear teeth are provided at equal intervals around the outer circumference of the first agitator gear 44. As described above, at least some of the gear teeth of the small-diameter gear section 432 and at least some of the gear teeth of the first agitator gear 44 mesh with each other. The first agitator gear 44 is fixed to the second end of the agitator shaft 21 in a manner that prevents relative rotation. Therefore, when power is transmitted from the coupling 41 to the first agitator gear 44 via the idler gear 43, the first agitator gear 44 rotates, and the agitator 20 rotates together with the first agitator gear 44. In other words, the agitator 20, including the agitator shaft 21, rotates in conjunction with the coupling 41.

[0076] In this developing cartridge 1, an idler gear 43 is positioned between the coupling gear 412 and the first agitator gear 44. However, the idler gear 43 may be omitted, and the coupling gear 412 and the first agitator gear 44 may be configured to mesh directly.

[0077] The first gear cover 45 is located on one side of the casing 10 in a first direction. Specifically, the first gear cover 45 is located on the first outer surface 11. The first gear cover 45 is fixed to the first outer surface 11, for example, by screws. The coupling gear 412, developing gear 42, idler gear 43, and first agitator gear 44 are housed between the first outer surface 11 and the first gear cover 45. The fastening holes 413 of the coupling portion 411 are exposed to the outside of the first gear cover 45, as shown in Figure 2. In this embodiment, the first gear cover 45 also serves as a holder cover for holding the holder 62 of the IC chip assembly 60, which will be described later. The structure of the first gear cover 45 as a holder cover will be described later.

[0078] The second gear section 50 is located on the other side of the casing 10 in the first direction. That is, the second gear section 50 is located on the second outer surface 12. Figure 5 is a perspective view of the developing cartridge 1 with the second gear section 50 disassembled. As shown in Figure 5, the second gear section 50 has a second agitator gear 51, a detection gear 52, a conductive member 53, and a second gear cover 54. Therefore, the second agitator gear 51, the detection gear 52, and the conductive member 53 are located on the second outer surface 12. Note that the gear teeth of the second agitator gear 51 are not shown in Figure 5.

[0079] The second agitator gear 51 is a gear that transmits the rotation of the agitator shaft 21 to the detection gear 52. The second agitator gear 51 is capable of rotating around a rotation axis 81 that extends in the first direction. Multiple gear teeth are provided at equal intervals around the outer circumference of the second agitator gear 51. The gear teeth of the second agitator gear 51 and the gear teeth of the detection gear 52 mesh with each other. The second agitator gear 51 is fixed to the first end of the agitator shaft 21 in a manner that prevents relative rotation. Therefore, when the agitator shaft 21 rotates, the second agitator gear 51 also rotates.

[0080] The detection gear 52 is a gear for transmitting information about the developing cartridge 1 to the image forming apparatus. The information about the developing cartridge 1 includes, for example, whether the developing cartridge 1 is a new (unused) developing cartridge or a used developing cartridge. The information about the developing cartridge 1 also includes, for example, the specifications of the developing cartridge 1. The specifications of the developing cartridge 1 include, for example, the number of printable pages (yield) that can be produced by the developer contained in the developing cartridge 1.

[0081] The detection gear 52 is capable of rotating around a rotation axis 85 that extends in the first direction. The rotation axis 85, which is the rotation center of the detection gear 52, constitutes the "second axis". The detection gear 52 has multiple gear teeth 521. The multiple gear teeth 521 are arranged on a part of the circumference of the detection gear 52. That is, the detection gear 52 is a missing-tooth gear in which multiple gear teeth 521 are arranged on a part of its outer circumference, and the other part does not have gear teeth 521.

[0082] When the developing cartridge 1 is unused, the gear teeth of the detection gear 52 mesh with the second agitator gear 51. In this case, the detection gear 52 rotates in conjunction with the agitator 20, which includes the agitator shaft 21. Therefore, when a driving force is input to the coupling 41, the driving force is transmitted through the coupling 41, idler gear 43, first agitator gear 44, agitator 20, and second agitator gear 51, causing the detection gear 52 to rotate. In other words, the detection gear 52 can rotate in conjunction with the coupling 41.

[0083] When using the image forming apparatus, the developing cartridge 1 is mounted in the drawer unit 90, and the drawer unit 90 is stored inside the image forming apparatus to begin use. After an unused developing cartridge 1 is mounted in the drawer unit 90 and the drawer unit 90 is stored inside the image forming apparatus, when driving force is applied to the coupling 41, the detection gear 52 rotates. Subsequently, when the detection gear 52 rotates beyond a certain angle, the engagement between the second agitator gear 51 and the detection gear 52 disengages, and the detection gear 52 stops rotating.

[0084] When the developing cartridge 1 is unused, the detection gear 52 is in a first position, indicating that the developing cartridge 1 is unused. When the detection gear 52 is in the first position, its teeth mesh with the second agitator gear 51. When the developing cartridge 1 is put into use, the detection gear 52 rotates from the first position to the second position. As a result, after the developing cartridge 1 is put into use, the detection gear 52 is in a second position, indicating that the developing cartridge 1 is used. When the detection gear 52 is in the second position, its teeth do not mesh with the second agitator gear 51. In this way, the state of the detection gear 52 changes between when it is unused and when it is put into use.

[0085] Furthermore, the detection gear 52 may be a movable gear that can move in the first direction. The movable gear does not have to be a gear with missing teeth. That is, the movable gear may have multiple gear teeth arranged circumferentially on its outer surface. In this case, when the movable gear rotates, the movable gear moves toward the first direction, disengaging the movable gear from the second agitator gear 51. The movable gear may also move away from the second outer surface 12 toward the first direction. Alternatively, the movable gear may move toward the second outer surface 12 toward the first direction.

[0086] Therefore, when a used developing cartridge 1 is mounted in the drawer unit 90 and the drawer unit 90 is housed in the image forming apparatus, the detection gear 52 and the second agitator gear 51 are disengaged, and the detection gear 52 does not rotate.

[0087] Furthermore, other gears may be interposed between the second agitator gear 51 and the detection gear 52. For example, the second gear section 50 may have a second idler gear that meshes with both the second agitator gear 51 and the detection gear 52. The second idler gear is located on the second outer surface 12. The rotation of the second agitator gear 51 may be transmitted to the detection gear 52 via the second idler gear.

[0088] The conductive member 53 is a conductive member. The material used for the conductive member 53 is a conductive metal or a conductive resin. The conductive member 53 is located on the second outer surface 12 of the casing 10. The conductive member 53 has a gear shaft 531 that protrudes in a first direction. The gear shaft 531 is located on the second outer surface 12. The gear shaft 531 also extends in a first direction along the rotation axis 85 from the second outer surface 12. The rotation axis 85 constitutes the "second axis". The gear shaft 531 also constitutes the "second shaft". The sensing gear 52 is supported by the gear shaft 531 and rotates around the gear shaft 531. The conductive member 53 also has a bearing portion 532. The bearing portion 532 contacts the roller shaft 32 of the developing roller 30. A part of the conductive member 53 may also contact the roller shaft 32. Alternatively, the roller shaft 32 may be inserted into the conductive member 53, and the roller shaft 32 may come into contact with the conductive member 53.

[0089] The drawer unit 90 has a conductive lever (not shown) that contacts the gear shaft 531. When the lever contacts the gear shaft 531, the conductive member 53 and the roller shaft 32 become electrically connected to the lever. When the image forming apparatus is driven, the power supplied from the lever to the gear shaft 531 maintains the roller shaft 32 at a predetermined bias voltage. In other words, the conductive member 53, including the gear shaft 531, acts as an electrode for supplying a bias voltage to the roller shaft 32.

[0090] The second gear cover 54 is located on the other side of the casing 10 in the first direction. Specifically, the second gear cover 54 is located on the second outer surface 12. The second gear cover 54 is fixed to the second outer surface 12, for example, by screws. The second agitator gear 51, at least a portion of the sensing gear 52, and the conductive member 53 are housed between the second outer surface 12 and the second gear cover 54. Thus, the second gear cover 54 covers at least a portion of the sensing gear 52. The second gear cover 54 also has an opening 541. A portion of the sensing gear 52 and a portion of the gear shaft 531 are exposed through the opening 541. The lever contacts the sensing gear 52 or the gear shaft 531 through the opening 541.

[0091] The detection gear 52 has a projection 522. The detection gear 52 partially covers the outer circumferential surface of the gear shaft 531. In the first direction, the projection 522 is located to the other side of the multiple gear teeth 521. The projection 522 also extends in the first direction. When viewed in the first direction, the projection 522 has an arc-shaped portion centered on the rotation axis 85. The projection 522 covers a portion of the circumferential surface of the gear shaft 531. The projection 522 is rotatable together with the detection gear 52.

[0092] In an unused developing cartridge 1, a portion of the gear shaft 531 is exposed to the opening 541. That is, the lever of the drawer unit 90 comes into contact with the gear shaft 531. When the image forming apparatus is put into use and driving force is input to the coupling 41, the detection gear 52 rotates. As the detection gear 52 rotates, the projection 522 is inserted between the lever and the gear shaft 531. This prevents the lever and the gear shaft 531 from coming into contact. Subsequently, as the detection gear 52 rotates further, the lever and the gear shaft 531 come into contact again. When the detection gear 52 rotates beyond a certain angle, the detection gear 52 stops rotating. Therefore, contact between the lever and the gear shaft 531 is maintained.

[0093] In this way, as the detection gear 52 rotates, the contact state between the lever and the gear shaft 531 changes according to the shape of the detection gear 52. By recognizing this change in contact state, the image forming apparatus identifies whether the installed developing cartridge 1 is new or not, and the specifications of the developing cartridge 1. That is, the detection gear 52 has a shape that represents information about the developer of the developing cartridge 1.

[0094] In this developing cartridge 1, the detection gear 52 had one projection 522, but the present invention is not limited to this. The detection gear 52 may have multiple projections extending in the first direction instead of projection 522. Also, the circumferential position and length of projection 522 may differ from those in this embodiment. The shape of the detection gear 52 can be varied according to the specifications of the developing cartridge 1, such as the number of printable pages. Specifically, the number of projections 522, the circumferential spacing of the multiple projections 522, the circumferential length of each projection 522, the radial length of each projection 522, etc., can be varied according to the specifications. In this way, by providing variations in the number and circumferential position of projections 522, it is possible to show various specifications of the developing cartridge 1 to the image forming apparatus.

[0095] Furthermore, while the development cartridge 1 uses a projection 522 to change the contact state between the lever and the gear shaft 531, the present invention is not limited to this. For example, the contact state between the lever and the gear shaft 531 may be changed via another component that moves in conjunction with the rotation of the detection gear 52. Specifically, the detection gear 52 and the projection 522 may be separate components. In this case, the projection 522 rotates along with the detection gear 52.

[0096] For example, the detection gear 52 may have a cam, and the cam may contact the projection 522. In this case, the cam rotates together with the rotation of the detection gear 52, and the rotation of the cam causes it to contact the projection 522, thereby moving the projection 522. The projection 522 may be rotatably mounted on a shaft provided on the second outer surface 12 or the second gear cover 54. Alternatively, the shaft of the projection 522 may be inserted into a hole in the second outer surface 12 or the second gear cover 54, and the projection 522 may be held rotatably.

[0097] Furthermore, the detection gear 52 may have a shape that represents other information. For example, the detection gear 52 may have a shape that represents the color of the developer contained in the developing cartridge 1.

[0098] The IC chip assembly 60 is located on one side of the casing 10 in a first direction. That is, the IC chip assembly 60 is positioned outside the first outer surface 11 of the casing 10. As shown in Figures 2 to 5, the IC chip assembly 60 includes an IC chip 61 and a holder 62. The IC chip 61 is a storage medium. Various information about the developing cartridge 1 is recorded on the IC chip 61. The holder 62 is a member that holds the IC chip 61. The holder 62 is held by the first gear cover 45.

[0099] As shown in Figure 5, the IC chip 61 has an electrical contact surface 611. The electrical contact surface 611 is made of a conductive metal. The electrical contact surface 611 is located on one side of the casing 10 in a first direction. The electrical contact surface 611 is also located on the first outer surface 11.

[0100] The drawer unit 90 has an electrical connector. The electrical connector is made of metal, for example. When the developing cartridge 1 is installed in the drawer unit 90, the electrical connector of the drawer unit 90 makes contact with the electrical contact surface 611. This allows the image forming apparatus to read information from the IC chip 61 and write information to the IC chip 61, or at least one of the latter. The electrical connector of the drawer unit 90 is made of metal, for example. In this developing cartridge 1, both the body of the IC chip 61 and the electrical contact surface 611 of the IC chip 61 are located on one side of the casing 10 in a first direction.

[0101] At least a portion of the holder 62 is covered by the first gear cover 45. The holder 62 has three bosses 621a, 621b, and 621c. Two bosses 621a and 621b extend in a first direction toward the first gear cover 45 from the face of the holder 62 opposite to the face facing the casing 10. The two bosses 621a and 621b are aligned in a second direction. Boss 621c extends in a first direction toward the casing 10 from the face of the holder 62 facing the casing 10. Meanwhile, as shown in Figures 2 and 4, the first gear cover 45 has two through holes 451a and 451b. The two through holes 451a and 451b are aligned in a second direction. Each through hole 451a and 451b penetrates the first gear cover 45 in a first direction. The casing 10 also has a recess 15. The recess 15 is recessed in a first direction on the first outer surface 11 of the casing 10.

[0102] Boss 621a is inserted into through hole 451a. Boss 621b is inserted into through hole 451b. Boss 621c is inserted into recess 15. The size (internal dimensions) of through hole 451a is larger than the size (external dimensions) of the corresponding boss 621a. Also, the size (internal dimensions) of through hole 451b is larger than the size (external dimensions) of the corresponding boss 621b. Also, the size (internal dimensions) of recess 15 is larger than the size (external dimensions) of boss 621c. For this reason, the holder 62 is able to move slightly relative to the casing 10 and the first gear cover 45 in a direction perpendicular to the first direction. The holder 62 may also be able to move in the first direction between the first gear cover 45 and the first outer surface 11.

[0103] The number of bosses provided on the holder 62 may be one or three or more. Similarly, the number of through holes provided on the first gear cover 45 may be one or three or more. Furthermore, the shape of each of the bosses 621a, 621b, and 621c may be cylindrical or rectangular.

[0104] Furthermore, in this developing cartridge 1, the bosses 621a and 621b are inserted into the through holes 451a and 451b, respectively, but the present invention is not limited to this. The first gear cover 45 may have two recesses instead of the through holes 451a and 451b. The bosses 621a and 621b can be inserted into these two recesses, respectively.

[0105] To miniaturize the image forming apparatus, it is necessary to reduce the projected area of ​​the developing cartridge 1 in the first direction. In other words, to miniaturize the image forming apparatus, it is necessary to reduce the size of the first outer surface 11 and the second outer surface 12. On the other hand, the coupling 41, the electrical contact surface 611, and the detection gear 52 are parts that connect to the main body of the image forming apparatus. For this reason, the coupling 41, the electrical contact surface 611, and the detection gear 52 cannot be arranged in overlapping positions in the first direction.

[0106] As shown in Figure 6, in this developing cartridge 1, the detection gear 52 is located on the other side of the casing 10 in the first direction. Also, the coupling 41 and the electrical contact surface 611 of the IC chip 61 are located on one side of the casing 10 in the first direction. By arranging the coupling 41, the electrical contact surface 611, and the detection gear 52 separately on the first outer surface 11 and the second outer surface 12, the size of the first outer surface 11 and the second outer surface 12 can be reduced. Therefore, the developing cartridge 1 and the image forming apparatus can be miniaturized.

[0107] Furthermore, in this embodiment, the coupling 41 is located to one side of the agitator shaft 21 in the second direction relative to one end in the first direction. Similarly, the detection gear 52 is located to one side of the agitator shaft 21 in the second direction relative to the other end in the first direction. Thus, the coupling 41 and the detection gear 52 are positioned on the same side of the agitator shaft 21 in the second direction. This allows the length of the developing cartridge 1 in the second direction to be shortened. Therefore, the developing cartridge 1 and the image forming apparatus can be miniaturized in the second direction.

[0108] In particular, in this embodiment, since the detection gear 52 is supported by the conductive member 53, the detection gear 52 and the conductive member 53 must be located on the same outer surface of the first outer surface 11 and the second outer surface 12. On the other hand, the conductive member 53, which is an electrode, is subjected to a high-voltage bias. Therefore, if the distance between the conductive member 53 and the electrical contact surface 611 of the IC chip 61 is short, the IC chip 61 may be affected by high-frequency noise.

[0109] However, in this developing cartridge, the detection gear 52 and the conductive member 53 are located on the second outer surface 12, which is opposite in the first direction to the first outer surface 11 where the electrical contact surface 611 is located. Therefore, electrical interference between the conductive member 53 and the electrical contact surface 611 can be reduced. Furthermore, electrical interference between the conductive member 53 and the IC chip 61 can be reduced. For example, the generation of high-frequency noise in the IC chip 61 caused by high-voltage charging to the conductive member 53 can be suppressed.

[0110] In this embodiment, the entire IC chip 61 having the electrical contact surface 611 is located on the first outer surface 11 opposite to the detection gear 52 and the conductive member 53 in the first direction. However, at least the electrical contact surface 611 of the IC chip 61 may be located on the first outer surface 11, and the body of the IC chip 61 may be located on another surface of the casing 10, for example. Even in that case, electrical interference between the conductive member 53 and the electrical contact surface 611 can be reduced. Electrical interference between the conductive member 53 and the IC chip 61 can also be reduced. For example, the generation of high-frequency noise in the IC chip 61 caused by high-voltage charging to the conductive member 53 can be suppressed.

[0111] <2. Variant> Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment.

[0112] Figure 7 is a perspective view of a modified developing cartridge 1A and drum cartridge 70A. This developing cartridge 1A includes a developing roller 30A, a coupling 41A, a detection gear 52A, and an IC chip 61A. In the example in Figure 7, the developing cartridge 1A is mounted on the drum cartridge 70A, not on the drawer unit. The drum cartridge 70A has one developing cartridge holder 71A that holds one developing cartridge 1A. The developing cartridge holder 71A is provided with a photosensitive drum 72A. When the developing cartridge 1A is mounted on the drum cartridge 70A, the developing roller 30A of the developing cartridge 1A comes into contact with the photosensitive drum 72A.

[0113] Figure 8 shows how the drum cartridge 70A, which holds the developing cartridge 1A, is mounted on the image forming apparatus 100A. As shown in Figure 8, the drum cartridge 70A, which holds the developing cartridge 1A, is mounted on the drum cartridge holder 101A provided on the image forming apparatus 100A.

[0114] Thus, a developing cartridge 1A that is mounted on a drum cartridge 70A can also employ a structure equivalent to that of the developing cartridge in the above embodiment. Specifically, as shown in Figure 7, in this developing cartridge 1A as well, the coupling 41A and the electrical contact surface 611A of the IC chip 61A are located on one side of the casing 10A in the first direction. The detection gear 52A is located on the other side of the casing 10A in the first direction. By arranging the coupling 41A, the electrical contact surface 611A, and the detection gear 52A separately on one side and the other side in the first direction, the end face of the developing cartridge 1A in the first direction can be reduced. Therefore, the developing cartridge 1A and the image forming apparatus 100A can be miniaturized.

[0115] In the above embodiment, the gear shaft 531, which is the first shaft, extended from the second outer surface 12 to the other side in the first direction. However, the gear shaft 531 does not have to be in direct contact with the second outer surface 12. For example, the casing 10 may further have a through hole penetrating the second outer surface 12 and a cap attached to the through hole, and the gear shaft may extend from the cap to the other side in the first direction. In this case, for example, the cap has a gear shaft that protrudes in the first direction toward the detection gear 53. The detection gear 53 rotates about the gear shaft 531 while being supported by the gear shaft.

[0116] Furthermore, in the above embodiment, the multiple gears in the first gear section 40 and the second gear section 50 were engaged with each other by the meshing of their gear teeth. However, the multiple gears in the first gear section 40 and the second gear section 50 may also be engaged with each other by frictional force. For example, instead of multiple gear teeth, friction members (e.g., rubber) may be provided on the outer circumference of two gears that engage with each other.

[0117] Furthermore, the developing cartridge 1 in the above embodiment was mounted on a drawer unit of an image forming apparatus. However, the developing cartridge of the present invention may be mounted on the main body of an image forming apparatus that does not have a drawer unit.

[0118] Furthermore, the detailed shape of the developing cartridge may differ from the shape shown in the figures of this application. Also, the elements that appear in the above embodiments and modifications may be combined as appropriate, to the extent that no inconsistencies arise. [Explanation of Symbols]

[0119] 1.1A Developer Cartridge 10 Casing 11 First outer surface 12 Second outer surface 20 Agitators 21 Agitator Shaft 22 Agitation blades 30 Developing roller 32 Roller Shaft 41,41A coupling 42 Developing Gear 43 Idol Gear 44. First Agitator Gear 51 Second Agitator Gear 52, 52A detection gear 53 Conductive material 61,61A IC chip 211 First end 412 Coupling Gear 413 Fastening holes 451 Through hole 521 gear teeth 522 Protrusion 531 Gear shaft 611, 611A Electrical contact surface

Claims

1. It is a developing cartridge, A developing roller rotatable about a first axis extending in a first direction, the developing roller having a roller body extending in the first direction, A housing capable of containing a developer, comprising: a first side having an outer surface; a second side spaced apart from the first side in the first direction; a third side on which the developing roller is located; and a fourth side spaced apart from the third side in the second direction intersecting the first direction; A coupling that is rotatable about a second shaft extending in the first direction and spaced apart from the first shaft in the second direction, the coupling having a coupling gear located on the outer surface, A storage medium having an electrical contact surface located on the outer surface, Equipped with, The aforementioned electrical contact surface is With respect to the developing roller, the coupling gear is located further away in the second direction than the developing roller, In the second direction, it is separated from the coupling, A developing cartridge characterized in that the tip of the roller body is located further away from the outer surface in the first direction than the tip of the roller body.

2. A developing cartridge according to claim 1, A developing cartridge characterized by the absence of a photosensitive drum.

3. A developing cartridge according to claim 1, A developing cartridge characterized in that the coupling is spaced apart from the developing roller in the second direction.

4. A developing cartridge according to claim 1, An agitator rotatable about a third axis extending in the first direction in accordance with the rotation of the coupling, the agitator having an agitator shaft extending in the first direction, the agitator shaft located further in the second direction than the second axis with respect to the developing roller. A developing cartridge characterized by further comprising the following features.

5. A developing cartridge according to claim 4, The agitator gear is further rotatable together with the agitator shaft, The agitator gear is, Located on the outer surface, With respect to the developing roller, a position located further away in the second direction than the second axis, A developing cartridge characterized by the following features.

6. A developing cartridge according to claim 1, The developing roller has a roller shaft extending in the first direction, which is rotatable together with the roller body. A developing cartridge characterized in that the electrical contact surface is spaced apart from the tip of the roller shaft in the second direction.

7. A developing cartridge according to claim 1, An agitator rotatable about a third axis extending in the first direction in accordance with the rotation of the coupling, further comprising an agitator shaft extending in the first direction, the agitator shaft located further away in the second direction than the second axis with respect to the developing roller, The developing roller has a roller shaft extending in the first direction, which is rotatable together with the roller body. A developing cartridge characterized in that the second direction is defined as the direction connecting the roller shaft and the agitator shaft.

8. A developing cartridge according to claim 1, A developing cartridge comprising an idler gear rotatable with respect to an idler shaft extending in the first direction, further comprising an idler gear located on the outer surface.

9. A developing cartridge according to claim 8, A developing cartridge characterized in that the idler gear meshes with the coupling gear.

10. A developing cartridge according to claim 9, A developing cartridge characterized in that the idler gear and the coupling gear are positioned between the developing roller and the electrical contact surface in the second direction.

11. A developing cartridge according to claim 1, A developing cartridge comprising a holder for holding the electrical contact surface, further comprising a holder located on the outer surface and movable relative to the housing.

12. A developing cartridge according to claim 1, A developing cartridge further comprising a detection projection that is movable in accordance with the rotation of the coupling, and which is located on the second side of the housing.

13. A developing cartridge according to claim 1, A developing cartridge further comprising an electrode located on the second side of the housing, which is electrically connected to a component of the developing cartridge.

14. A developing cartridge according to claim 13, A developing cartridge characterized in that the electrode is electrically connected to the roller shaft of the developing roller.

15. A developing cartridge according to claim 13, A developing cartridge characterized in that a portion of the electrode is spaced apart from the developing roller in the second direction.

16. A developing cartridge according to claim 1, A developing cartridge characterized in that the second direction is perpendicular to the first direction.

17. A developing cartridge according to claim 1, The developing cartridge is characterized in that the storage medium is located on the outer surface.

18. A developing cartridge according to claim 1, The developing cartridge is characterized in that the storage medium stores information related to the developing cartridge.

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