Developing cartridge

Abstract

The utility model relates to a developing box detachably mounted in imaging equipment, which comprises a shell used for accommodating a developing agent; a developing roller for carrying a developer and rotatable about a rotational axis extending in a longitudinal direction; the guide part is used for being matched with a guide rail in the imaging equipment so as to guide the developing box; parameter information of the developing box is stored in the chip, and the chip is provided with an electric contact part used for establishing communication connection with imaging equipment; a conductive assembly having a power receiving member for receiving power in contact with a power output member in the image forming apparatus; when observed in the direction perpendicular to the rotation axis, a maximum area is defined by the rotation axis of the developing roller, the two outermost points of the electric contact part and the two outermost points of the electric power receiving part, at least one part of the guide part is located outside the area, the design can reduce the influence of vibration of the guide part on the electric power receiving part, and the electric power receiving part can be prevented from being damaged. Therefore, the contact stability of the power receiving member and the imaging device is improved.

Description

[0001] This utility model claims the priority of a prior Chinese application with an application number of 202420132304.2, a filing date of January 18, 2024, and an invention title of "Developing Cartridge", and the entire content of the prior application is cross-referenced in this application. Technical Field

[0002] This utility model relates to the field of electrophotographic imaging, and particularly to a developing cartridge that can be detachably installed in an electrophotographic imaging device. Background Art

[0003] A developing cartridge is a container used in electrophotographic imaging devices such as laser printers and copiers (hereinafter referred to as "imaging devices"). The developing cartridge includes consumable parts such as a developing roller and a doctor blade. The developing roller is rotatably arranged and is used to carry the developer contained in the developing cartridge. The doctor blade contacts the developing roller and is used to adjust the thickness of the developer on the surface of the developing roller.

[0004] As is well known, when the imaging device performs development, the developing roller and the photosensitive drum approach each other, and by forming an electric field force of a predetermined magnitude and direction between the developing roller and the photosensitive drum arranged opposite to the developing roller, the developer reaches the surface of the photosensitive drum from the surface of the developing roller. Thus, the electrostatic latent image on the surface of the photosensitive drum is developed; when the imaging device does not require development, the separation mechanism in the developing cartridge receives a separation force from the imaging device, forcing the developing cartridge to move relative to the photosensitive drum. In this way, the developing roller and the photosensitive drum are separated from each other. When the imaging device needs to perform development again, the separation mechanism no longer receives the separation force, or under the action of a reset member provided in the developing cartridge, the developing cartridge approaches the photosensitive drum, and in this way, the developing roller and the photosensitive drum approach each other again.

[0005] For this reason, in a preferred embodiment, the developing cartridge is further provided with a developing roller electrical contact and a doctor blade electrical contact respectively for receiving power from the imaging device; in addition, the developing cartridge further includes a guiding portion for guiding the installation of the developing cartridge and a chip for establishing a communication connection between the developing cartridge and the imaging device. In this preferred embodiment, in a plane perpendicular to the rotation axis of the developing roller, the respective electrical contacts, the chip, and the rotation axis of the developing roller enclose a largest area, and the guiding portion is located within the area.

[0006] As described above, the developing cartridge needs to experience multiple movements of the developing roller and the photosensitive drum approaching and separating from each other in the imaging device. During this movement process, the developing roller electrical contact and the doctor blade electrical contact will respectively rub against the corresponding power output members in the imaging device, which may cause wear of the developing roller electrical contact, the doctor blade electrical contact, and the power output members, and may even cause at least one of the developing roller electrical contact and the doctor blade electrical contact to be offset. Summary of the Utility Model

[0007] In view of this, the present utility model provides a developing cartridge adopting the following technical solutions to solve at least one of the above technical problems. The specific solutions are as follows:

[0008] A developing cartridge is detachably installed in an imaging device. The developing cartridge includes: a housing for accommodating a developer; a developing roller for carrying the developer and rotatable about a rotation axis extending in the longitudinal direction; a guiding portion for cooperating with a guide rail in the imaging device to guide the developing cartridge; a chip storing parameter information of the developing cartridge and provided with an electrical contact portion for establishing a communication connection with the imaging device; and a conductive assembly having a power receiving member for contacting a power output member in the imaging device to receive power. When observing in a direction perpendicular to the rotation axis, a maximum area is enclosed by the rotation axis of the developing roller, the outermost two points of the electrical contact portion, and the outermost two points of the power receiving member. At least a part of the guiding portion is located outside this area.

[0009] Further, in the longitudinal direction, the electrical contact portion and the conductive assembly are located on the same side of the developing cartridge. The imaging device is provided with a first power output member and a second power output member, and the absolute value of the voltage output by the first power output member is lower than the absolute value of the voltage output by the second power output member. The developing roller is arranged opposite to a photosensitive drum outside the developing cartridge, and the developer can develop an electrostatic latent image formed on the surface of the photosensitive drum. The developing cartridge further includes a separation mechanism for receiving a separation force from the imaging device to force the developing roller and the photosensitive drum to separate from each other. When the power receiving member contacts the second power output member to receive power, when observing in the longitudinal direction, the distance from the power receiving member to the separation mechanism is not less than the distance from the guiding portion to the separation mechanism.

[0010] Further, in the longitudinal direction, the electrical contact portion and the conductive assembly are located on the same side of the developing cartridge. The imaging device is provided with a first power output member and a second power output member, and the absolute value of the voltage output by the first power output member is lower than the absolute value of the voltage output by the second power output member. The developing roller is arranged opposite to a photosensitive drum outside the developing cartridge, and the developer can develop an electrostatic latent image formed on the surface of the photosensitive drum. The developing cartridge further includes a separation mechanism for receiving a separation force from the imaging device to force the developing roller and the photosensitive drum to separate from each other. When the power receiving member contacts the first power output member to receive power, when observing in the longitudinal direction, the distance from the power receiving member to the separation mechanism is not greater than the distance from the guiding portion to the separation mechanism.

[0011] Further, in the longitudinal direction, the electrical contact portion and the conductive component are located on the same side of the developing cartridge; the imaging device is provided with a first power output member and a second power output member, and the absolute value of the voltage output by the first power output member is lower than the absolute value of the voltage output by the second power output member; when the power receiving member contacts the second power output member to receive power, when observed in the longitudinal direction, the contact position between the power receiving member and the second power output member has a projection on a plane perpendicular to the longitudinal direction, and the straight line where the connection line between the center point of the projection and the center points of all the electrical contact portions is L1, and the rotation center of the developing roller and the guiding portion are respectively located on both sides of the straight line L1.

[0012] Further, in the longitudinal direction, the electrical contact portion and the conductive component are located on the same side of the developing cartridge; the imaging device is provided with a first power output member and a second power output member, and the absolute value of the voltage output by the first power output member is lower than the absolute value of the voltage output by the second power output member; when the power receiving member contacts the first power output member to receive power, when observed in the longitudinal direction, the contact position between the power receiving member and the first power output member has a projection on a plane perpendicular to the longitudinal direction, and the straight line where the connection line between the center point of the projection and the center points of all the electrical contact portions is L1, and the rotation center of the developing roller and the guiding portion are both located on the same side of the straight line L1.

[0013] Further, the developing cartridge further includes a doctor blade, the doctor blade is fixedly arranged on the housing and is used for adjusting the thickness of the developer on the surface of the developing roller; the power receiving member contacts the first power output member or the second power output member to receive power, and the conductive component further includes a first conductive member for electrically connecting with the power receiving member, and the first conductive member supplies power to the doctor blade at least by contacting the doctor blade.

[0014] Further, the doctor blade includes a blade holder and a blade, the blade is supported by the blade holder, the blade holder is fixedly installed on the housing, the blade contacts the surface of the developing roller, and the power supplied by the first conductive member to the doctor blade is then supplied to the developing roller by the blade.

[0015] Further, the conductive component further includes a second conductive member, the first conductive member is provided with a first power output portion and a second power output portion, wherein the first power output portion realizes electrical connection with the doctor blade by contacting the doctor blade; the second conductive member is provided with an intermediate power receiving portion and an intermediate power output portion, the intermediate power receiving portion is used for directly or indirectly contacting the second power output portion to receive power, and the intermediate power output portion is used for directly or indirectly supplying power to the developing roller.

[0016] Further, the conductive component further includes a voltage regulator disposed between the first conductive member and the developing roller; when the power receiving member contacts the first power output member to receive power, the voltage regulator is configured to raise the voltage output by the first conductive member to be substantially the same as the voltage output by the second power output member; when the power receiving member contacts the second power output member to receive power, the voltage regulator is configured to lower the voltage output by the first conductive member to be substantially the same as the voltage output by the first power output member.

[0017] Further, the first conductive member and the power receiving member are integrally formed. Description of the Drawings

[0018] Figure 1 is a perspective view of the developing cartridge according to Embodiment 1 of the present invention.

[0019] Figure 2 and Figure 3 is an exploded view of some components in the developing cartridge according to Embodiment 1 of the present invention.

[0020] Figure 4 is a plan view of the developing cartridge according to Embodiment 1 of the present invention as viewed in the longitudinal direction.

[0021] Figure 5 is a plan view of the deformed structure of the developing cartridge according to Embodiment 1 of the present invention as viewed in the longitudinal direction.

[0022] Figure 6 is a plan view of the developing cartridge according to Embodiment 2 of the present invention as viewed in the longitudinal direction.

[0023] Figure 7 is a plan view of the deformed structure of the developing cartridge according to Embodiment 2 of the present invention as viewed in the longitudinal direction. Detailed Description of the Embodiments

[0024] The embodiments of the present invention will be described in detail below with reference to the drawings.

[0025] Embodiment 1

[0026] [Overall Structure of the Developing Cartridge]

[0027] As Figure 1 shown, the developing cartridge 100 includes a housing 1, a developing roller 11, a blade 2, and an end cap 7. The housing is configured to accommodate a developer. The developing roller 11 is rotatably disposed in the housing 1 and is configured to carry the developer. The blade 2 is fixedly mounted on the housing 1 and contacts the developing roller 11 to adjust the thickness of the developer on the surface of the developing roller 11. The end cap 7 is fixedly mounted on the housing 1, and the developing roller 11 is directly or indirectly supported by the end cap 7.

[0028] In one embodiment, the developing cartridge 100 is independently provided as a product and is detachably mounted to an imaging device provided with a photosensitive drum. Thus, the developing roller 11 is disposed opposite to the photosensitive drum. When the imaging device performs development, the developer carried by the developing roller 11 can develop the electrostatic latent image formed on the surface of the photosensitive drum outside the developing cartridge 100.

[0029] In one embodiment, the developing cartridge 100 needs to be first detachably mounted to a drum cartridge provided with a photosensitive drum. At this time, the developing cartridge 100 and the drum cartridge together form a processing cartridge, the developing roller and the photosensitive drum are disposed opposite to each other, and then the drum cartridge and the developing cartridge are together detachably mounted to the imaging device. When the imaging device performs development, the developer carried by the developing roller 11 can also develop the electrostatic latent image formed on the surface of the photosensitive drum.

[0030] In one embodiment, the developing cartridge 100 and a drum cartridge provided with a photosensitive drum are combined with each other to form a processing cartridge, and the developing cartridge 100 is not detachable relative to the drum cartridge. At this time, the developing roller and the photosensitive drum are also disposed opposite to each other. The processing cartridge is detachably mounted to the imaging device. When the imaging device performs development, the developer carried by the developing roller 11 can also develop the electrostatic latent image formed on the surface of the photosensitive drum.

[0031] Regardless of the form in which the developing cartridge 100 is provided, the developing cartridge 100 can be detachably mounted to the imaging device. During the installation and removal of the developing cartridge 100, the guiding portion 72 provided on the end cap 7 cooperates with the guide rail in the imaging device to guide the developing cartridge 100, and finally ensures that the developing cartridge 100 moves along a predetermined path.

[0032] When the imaging device does not perform development, the separating mechanism 9 is used to receive the separating force from the imaging device to force the developing cartridge 100 to move relative to the photosensitive drum, thereby realizing the separation of the developing roller 11 and the photosensitive drum from each other; when the imaging device needs to perform development again, the separating mechanism 9 no longer receives the separating force, and the developing cartridge 100 moves relative to the photosensitive drum again under the action of a separately provided resetting member, thereby realizing the approaching of the developing roller 11 and the photosensitive drum to each other. In other embodiments, the separating mechanism 9 can also realize the approaching of the developing roller 11 and the photosensitive drum by receiving the combining force from the imaging device.

[0033] Such as Figure 1 and Figure 3As shown, the developing roller 11 rotates about a rotation axis L extending in the longitudinal direction. The developing cartridge 100 further includes a driving force receiving member 14 for receiving a driving force from the imaging device. The driving force received by the driving force receiving member 14 can be used to directly drive the developing roller 11 to rotate, or can drive the developing roller 11 to rotate through a driving force transmission assembly 12. For the convenience of description, hereinafter, along the longitudinal direction, the side where the driving force receiving member 14 is provided is the driving side / left side, and the side where the driving force receiving member 14 is not provided is the non-driving side / right side, that is, the driving side and the non-driving side are arranged oppositely.

[0034] In one embodiment, the separating mechanism 9 includes at least one of a left separating mechanism 9a provided on the driving side and a right separating mechanism 9b provided on the non-driving side. The developing cartridge 100 further includes a reset member 91 for forcing the separating mechanism 9 to reset. Preferably, the left separating mechanism 9a and the right separating mechanism 9b are provided simultaneously, so that the developing roller 11 and the photosensitive drum can be separated more thoroughly.

[0035] The doctor blade 2 includes a blade holder 21 and a blade 22. The blade 22 is supported by the blade holder 21. The blade holder 21 is fixedly installed on the housing 1. The blade 22 contacts the surface of the developing roller 11 and is used to adjust the thickness of the developer on the surface of the developing roller 11. In the doctor blade 2, at least the blade 22 is made of a conductive material. Preferably, the doctor blade 2 is entirely made of a conductive material, which is beneficial for the doctor blade 2 to receive electricity more conveniently.

[0036] The developing cartridge 100 further includes a chip 8 storing parameter information of the developing cartridge 100. The chip 8 is provided with a plurality of electrical contact portions 81 for making electrical contact with the imaging device. When the developing cartridge 100 is in a state of being installed in the imaging device, the electrical contact portions 81 contact the needles in the imaging device, so that the developing cartridge 100 / chip 8 and the imaging device establish a communication connection.

[0037] In some embodiments, the developing cartridge 100 further includes a powder filling port 13 provided on the housing 1 and a sealing member 15 for sealing the powder filling port 13. Along the longitudinal direction, at least a part of the powder filling port 13 or at least a part of the sealing member 15 is not blocked by the end cap 7. Or rather, along the longitudinal direction, at least a part of the powder filling port 13 or at least a part of the sealing member 15 is exposed outside the developing cartridge, so that the user can supplement the developer into the housing 1 without removing the end cap 7. Preferably, the entire sealing member 15 is exposed outside the developing cartridge.

[0038] Further, the imaging device is further provided with a first power output member for supplying power to the developing roller 11 and a second power output member for supplying power to the doctor blade 2, and the voltages supplied by the first power output member and the second power output member are different; the developing cartridge 100 further includes a conductive component 4. When the developing cartridge 100 is in a state of being installed in the imaging device, the conductive component 4 contacts one of the power output members (the first power output member and the second power output member) to receive power. At the same time, the conductive component 4 also supplies power to the developing roller 11 and the doctor blade 2. Hereinafter, an example in which the conductive component 4 contacts the second power output member (simply referred to as the power output member) will be described.

[0039] [Conductive component]

[0040] As Figure 2 shown, the conductive component 4 at least includes an electrically connected first conductive member 41 and a power receiving member 44. The power receiving member 44 is used to contact the power output member to receive power. The first conductive member 41 also at least contacts the doctor blade 2. In this way, the power received by the power receiving member 44 can be supplied to the doctor blade 2 through the first conductive member 41, and the power is then supplied to the developing roller 11 by the blade 22.

[0041] In one embodiment, as Figure 2 shown, the first conductive member 41 is provided with a first power output portion 411 and a second power output portion 412. Among them, the first power output portion 411 realizes electrical connection with the doctor blade 2 by contacting the doctor blade 2. In this way, the first power output portion 411 can supply power to the doctor blade, and the second power output portion 412 is directly or indirectly electrically connected to the developing roller 11 to realize the first conductive member 41 supplying power to the developing roller 11.

[0042] In one embodiment, in the manner that the first conductive member 41 indirectly supplies power to the developing roller 11, the conductive component 4 further includes a second conductive member 42, as Figure 2 shown, the second conductive member 42 is provided with an intermediate power receiving portion 421 and an intermediate power output portion 422. Among them, the intermediate power receiving portion 421 is used to directly or indirectly contact the second power output portion 412 to receive power, and the intermediate power output portion 422 is used to directly or indirectly supply power to the developing roller 11.

[0043] Further, the developing cartridge 100 further includes a conductive bracket 3 provided on the non-driving side. The conductive bracket 3 is fixedly connected to the end cap 7 and is used to rotatably support the developing roller 11, as Figure 2As shown, the conductive bracket 3 is provided with a bracket-side power receiving part 31 and a bracket-side power output part 32. Among them, the bracket-side power receiving part 31 is used to receive power by contacting the intermediate power output part 422, and the bracket-side power output part 32 is used to supply power to the developing roller 11 by contacting the developing roller 11.

[0044] It can be seen that in the conductive component 4 provided with the second conductive member 42 and the conductive bracket 3, the power received by the power receiving member 44 will be sequentially supplied to the developing roller 11 through the first conductive member 41, the second conductive member 42 and the conductive bracket 3. Although this method prolongs the power supply path, it can improve the design freedom of each component in the conductive component 4, so that each component in the conductive component 4 does not have to be restricted by the structure on the conductive side.

[0045] In some embodiments, the power receiving member 44 and the first conductive member 41 are integrally formed. At this time, the power receiving member 44 will become a part of the first conductive member 41, and the first conductive member 41 is installed on the end cap 7 or the housing 1 through the installation part 413 provided therein.

[0046] As described above, the voltage supplied by the first power output member and the voltage supplied by the second power output member are different. When the conductive component 4 is provided with only one power receiving member 44, and the power received by the power receiving member 44 is supplied to the doctor blade 2 while being supplied to the developing roller 11, the voltage finally received by one of the doctor blade 2 and the developing roller 11 is always different from its predetermined voltage. To ensure the stable developing quality of the developing cartridge 100, in a preferred manner, the conductive component 4 further includes a voltage regulating member 43 provided therein. The voltage regulating member 43 is used to regulate the voltage output by the first conductive member 41 so that the voltage regulated by the voltage regulating member 43 can be basically consistent with the voltage output by the first power output member or the voltage output by the second power output member.

[0047] Generally, the absolute value of the voltage output by the first power output member is lower than the absolute value of the voltage output by the second power output member. In this way, when the power receiving member 44 contacts the first power output member to receive power, the voltage regulating member 43 is used to raise the voltage output by the first conductive member 41 to be basically consistent with the voltage output by the second power output member; when the power receiving member 44 contacts the second power output member to receive power, the voltage regulating member 43 is used to lower the voltage output by the first conductive member 41 to be basically consistent with the voltage output by the first power output member; the voltage output by the first power output member and the voltage output by the second power output member can be positive voltage or negative voltage.

[0048] From the perspective of simplifying the overall structure of the conductive component 4, preferably, the power receiving member 44 receives power by contacting the second power output member. At this time, the voltage regulating member 43 is disposed in the path of supplying power from the first conductive member 41 to the developing roller 11. In other words, the voltage regulating member 43 is disposed between the first conductive member 41 and the developing roller 11. The voltage regulating member 43 is configured as an impedance element, or the voltage regulating member 43 is configured to include at least one of an impedance element, a semiconductor element, and other electronic elements.

[0049] However, when the voltages output by the first power output member and the second power output member are substantially the same, the voltage regulating member 43 does not have to be provided.

[0050] [Position of the guiding portion]

[0051] When the developing cartridge 100 is in a state of being installed in the imaging device, the developing cartridge 100 is supported by the guiding portion 72. When the separating mechanism 9 receives a separating force and forces the developing cartridge 100 to move relative to the photosensitive drum, the entire developing cartridge 100 is guided by the guiding portion 72. As Figure 4 shown, when viewed from right to left along the longitudinal direction, a maximum area Q is enclosed by passing through the rotation axis L of the developing roller, the outermost two points of the electrical contact portion 81, and the outermost two points of the power receiving member 44. At least a part of the guiding portion 72 is located outside the area Q. In this way, the influence of the vibration generated by the guiding portion 72 during movement on the power receiving member 44 can be reduced. In particular, when the entire guiding portion 72 is located outside the area Q, it is more beneficial to reduce the influence of the vibration on the power receiving member 44.

[0052] As Figure 4 shown, the power receiving member 44 is exposed outward through the exposure hole 71 provided in the end cap 7, and the power receiving member 44 is configured as a non-point-shaped body, and the electrical contact portion 81 is also configured as a non-point-shaped body. Therefore, in Figure 4 , the outermost two points of the power receiving member 44 and the outermost two points of the electrical contact portion 81 are both spaced apart from each other. The line segment s1 connects the rotation axis L of the developing roller and one outermost point of the electrical contact portion 81, the line segment s2 connects the other outermost point of the electrical contact portion 81 and one outermost point of the power receiving member 44, and the line segment s3 connects the other outermost point of the power receiving member 44 and the rotation axis L of the developing roller. In this way, the area Q enclosed by the line segments s1, s2, and s3 is the largest.

[0053] Embodiment 2

[0054] As Figure 6 shown, next, Embodiment 2 of the present application will be introduced. For the parts that are the same as those in Embodiment 1, they will not be described again in this embodiment. The difference from Embodiment 1 is that the power receiving member 44 receives power by contacting the first power output member.

[0055] As Figure 6 shown, in this embodiment, the developing cartridge 100 is provided with a guiding portion 72 for cooperating with a rail in an imaging device. During the installation and removal of the developing cartridge 100, the developing cartridge 100 is guided to move along a predetermined path. In a plane perpendicular to the longitudinal direction, the distance from the power receiving member 44 to the separating mechanism 9 is not greater than the distance from the guiding portion 72 to the separating mechanism 9.

[0056] When observing the developing cartridge 100 along a direction perpendicular to the rotation axis L of the developing roller 1, a maximum area Q is enclosed by passing through the rotation axis L of the developing roller, the outermost two points of the electrical contact portion 81, and the outermost two points of the power receiving member 44. At least a part of the guiding portion 72 is located outside the area Q. Thus, it is possible to reduce the influence of the vibration generated during the cooperative movement of the guiding portion 72 and the rail on the electrical contact between the power receiving member 44 and the first power output member, and avoid poor electrical contact between the power receiving member 44 and the first power output member; when the entire guiding portion 72 is located outside the area Q, the influence of the vibration on the electrical contact between the power receiving member 44 and the first power output member is smaller.

[0057] [Other descriptions]

[0058] Based on the above-mentioned Embodiment 1 and Embodiment 2, the guiding portion 72 can be provided as one or more, and the components in the developing cartridge 100 also have the following positional relationship:

[0059] When the power receiving member 44 contacts the second power output member to receive power, as Figure 4 and Figure 5 shown, when observing the developing cartridge 100 along the longitudinal direction, the contact position between the power receiving member 44 and the second power output member has a projection on a plane perpendicular to the longitudinal direction. The straight line where the connection line between the center point P of the projection and the center point M of all the electrical contact portions 81 is located is L1. The rotation center L of the developing roller 11 and the guiding portion 72 are respectively located on both sides of the straight line L1.

[0060] When the power receiving member 44 contacts the first power output member to receive power, as Figure 6 and Figure 7 shown, when observing the developing cartridge 100 along the longitudinal direction, the contact position between the power receiving member 44 and the first power output member has a projection on a plane perpendicular to the longitudinal direction. The straight line where the connection line between the center point P of the projection and the center point M of all the electrical contact portions 81 is located is L1. The rotation center L of the developing roller 11 and the guiding portion 72 are both located on the same side of the straight line L1.

[0061] [Beneficial effects]

[0062] 1. At least a part of the guiding portion 72 is located outside the region Q. During the process of the developing roller 11 and the photosensitive drum separating from each other and then approaching each other again, the influence of the vibration generated by the guiding portion 72 on the power receiving member 44 can be reduced. Thus, the power receiving member 44 can maintain good contact with the power output member in the imaging device.

[0063] 2. The conductive assembly 4 only needs to be provided with one power receiving member 44, which is beneficial to simplifying the structure of the conductive assembly 4.

[0064] 3. On the basis of point 2, only the contact accuracy between one power receiving member 44 and the corresponding power output member needs to be considered, rather than the contact accuracy between two power receiving members 44 and the corresponding power output members respectively. Obviously, the risk of the disengagement of one power receiving member from its corresponding power output member is lower.

[0065] 4. In Embodiment 1, as Figure 4 shown, in a plane perpendicular to the longitudinal direction, the distance from the power receiving member 44 to the separating mechanism 9 is not less than the distance from the guiding portion 72 to the separating mechanism 9. Thus, when the separating mechanism 9 receives the separating force applied by the imaging device, the influence of the vibration on the power receiving member 44 can also be reduced.

Claims

1. A developing cartridge detachably mounted in an imaging apparatus, characterized in that, The developing cartridge includes: A housing for containing a developer; A developing roller for carrying the developer and rotatable about a rotation axis extending in a longitudinal direction; A guiding portion for cooperating with a guide rail in an imaging device to guide the developing cartridge; A chip storing parameter information of the developing cartridge and provided with an electrical contact portion for establishing a communication connection with the imaging device; A conductive assembly having a power receiving member for contacting a power output member in the imaging device to receive power; When viewed in a direction perpendicular to the rotation axis, a maximum area is enclosed by the rotation axis of the developing roller, the outermost two points of the electrical contact portion, and the outermost two points of the power receiving member, and at least a part of the guiding portion is located outside this area.

2. The developing cartridge according to claim 1, wherein In the longitudinal direction, the electrical contact portion and the conductive assembly are located on the same side of the developing cartridge; A first power output member and a second power output member are provided in the imaging device, and the absolute value of the voltage output by the first power output member is lower than the absolute value of the voltage output by the second power output member; The developing roller is disposed opposite to a photosensitive drum outside the developing cartridge, and the developer can develop an electrostatic latent image formed on the surface of the photosensitive drum; The developing cartridge further includes a separating mechanism for receiving a separating force from the imaging device to force the developing roller and the photosensitive drum to separate from each other. When the power receiving member contacts the second power output member to receive power, when viewed in the longitudinal direction, the distance from the power receiving member to the separating mechanism is not less than the distance from the guiding portion to the separating mechanism.

3. The developing cartridge according to claim 1, wherein In the longitudinal direction, the electrical contact portion and the conductive assembly are located on the same side of the developing cartridge; A first power output member and a second power output member are provided in the imaging device, and the absolute value of the voltage output by the first power output member is lower than the absolute value of the voltage output by the second power output member; The developing roller is disposed opposite to a photosensitive drum outside the developing cartridge, and the developer can develop an electrostatic latent image formed on the surface of the photosensitive drum; The developing cartridge further includes a separating mechanism for receiving a separating force from the imaging device to force the developing roller and the photosensitive drum to separate from each other. When the power receiving member contacts the first power output member to receive power, when viewed in the longitudinal direction, the distance from the power receiving member to the separating mechanism is not greater than the distance from the guiding portion to the separating mechanism.

4. The developing cartridge according to claim 1, wherein, In the longitudinal direction, the electrical contact portion and the conductive assembly are located on the same side of the developing cartridge; A first power output member and a second power output member are provided in the imaging device, and the absolute value of the voltage output by the first power output member is lower than the absolute value of the voltage output by the second power output member; When the power receiving member contacts the second power output member to receive power, when viewed in the longitudinal direction, the contact position of the power receiving member and the second power output member has a projection on a plane perpendicular to the longitudinal direction, and the straight line where the connection line between the center point of the projection and the center points of all electrical contact portions is L1, and the rotation center of the developing roller and the guiding portion are respectively located on both sides of the straight line L1.

5. The developing cartridge according to claim 1, wherein, In the longitudinal direction, the electrical contact portion and the conductive assembly are located on the same side of the developing cartridge; A first power output member and a second power output member are provided in the imaging device, and the absolute value of the voltage output by the first power output member is lower than the absolute value of the voltage output by the second power output member; When the power receiving member receives power by contacting the first power output member, when observed in the longitudinal direction, the contact position of the power receiving member and the first power output member has a projection on a plane perpendicular to the longitudinal direction, and the straight line where the connection line between the center point of the projection and the center points of all the electrical contact parts is L1, and the rotation center of the developing roller and the guiding part are both located on the same side of the straight line L1.

6. The developing cartridge according to any one of claims 2-5, characterized in that, The developing cartridge further includes a doctor blade, which is fixedly arranged on the housing and is used to adjust the thickness of the developer on the surface of the developing roller; The power receiving member receives power by contacting the first power output member or the second power output member, and the conductive assembly further includes a first conductive member for electrically connecting with the power receiving member, and the first conductive member supplies power to the doctor blade by at least contacting the doctor blade.

7. The developing cartridge according to claim 6, wherein The doctor blade includes a blade holder and a blade, the blade is supported by the blade holder, the blade holder is fixedly installed on the housing, the blade contacts the surface of the developing roller, and the power supplied from the first conductive member to the doctor blade is then supplied from the blade to the developing roller.

8. The developing cartridge according to claim 6, characterized in that, The conductive assembly further includes a second conductive member, the first conductive member is provided with a first power output portion and a second power output portion, wherein the first power output portion realizes electrical connection with the doctor blade by contacting the doctor blade; The second conductive member is provided with an intermediate power receiving portion and an intermediate power output portion, the intermediate power receiving portion is used to receive power by directly or indirectly contacting the second power output portion, and the intermediate power output portion is used to supply power directly or indirectly to the developing roller.

9. The developing cartridge according to claim 6, wherein, The conductive assembly further includes a voltage regulator disposed between the first conductive member and the developing roller; When the power receiving member receives power by contacting the first power output member, the voltage regulator is used to raise the voltage output by the first conductive member to be substantially the same as the voltage output by the second power output member; When the power receiving member receives power by contacting the second power output member, the voltage regulator is used to lower the voltage output by the first conductive member to be substantially the same as the voltage output by the first power output member.

10. The developing cartridge according to claim 6, characterized in that, The first conductive member and the power receiving member are integrally formed.

Images