Drum cartridge and process cartridge

Abstract

The utility model relates to a drum box and a processing box with the drum box, the drum box is suitable for imaging equipment, and the drum box comprises a drum shell; a photosensitive drum whose rotation axis extends in the longitudinal direction; the charging part is in contact with the photosensitive drum and is used for charging the surface of the photosensitive drum; a first conductive member having a power receiving portion for receiving power from the image forming apparatus, the first conductive member supplying power to the charging member; a driving force transmission device for transmitting a driving force between the photosensitive drum and the charging member, the driving force transmission device including: a first driving member provided to rotate along with rotation of the photosensitive drum; the second driving part is coaxially arranged with the charging part, is matched with the first driving part and is used for receiving the driving force from the first driving part so as to drive the charging part to rotate; when the drum box is installed at the preset position of the imaging equipment, the power receiving part faces upwards, so that residual carbon powder on the surface of the charging part can be effectively removed, and the charging efficiency of the charging part on the photosensitive drum is prevented from being reduced.

Description

Technical Field

[0001] The utility model relates to the field of electrophotographic imaging, in particular to a drum cartridge for an electrophotographic imaging device and a processing cartridge having the drum cartridge. Background Art

[0002] A photosensitive drum is a photosensitive member on which an electrostatic latent image can be formed on its surface. During the imaging process of an electrophotographic imaging device (hereinafter referred to as "imaging device"), the surface of the photosensitive drum is first charged by a charging member, and then a laser beam carrying imaging information selectively irradiates the surface of the photosensitive drum. In this way, an electrostatic latent image will be formed on the surface of the photosensitive drum. Subsequently, under the action of the electric field force between the developing roller and the photosensitive drum, the toner carried by the developing roller reaches the surface of the photosensitive drum, and the electrostatic latent image is developed. Under the action of the electric field force between the transfer member and the photosensitive drum in the imaging device, the developed electrostatic latent image is transferred onto the imaging medium.

[0003] In the prior art, the charging member is in contact with the photosensitive drum, and under the action of the frictional force between the charging member and the photosensitive drum, the charging member is driven to rotate; during the transfer process, there is always a small amount of toner remaining on the surface of the photosensitive drum, and these remaining toner may reach the surface of the charging member as the photosensitive drum rotates. Finally, the charging efficiency of the charging member for the photosensitive drum will decrease.

[0004] For this reason, there has been a solution of providing a cleaning member in contact with the charging member. The cleaning member can clean the remaining toner adhered to the surface of the charging member, thereby improving the charging efficiency of the charging member for the photosensitive drum; however, to improve the cleaning efficiency of the cleaning member, the cleaning member needs to be in close contact with the charging member. As a result, the rotational resistance of the charging member will increase, and finally, the charging efficiency of the charging member for the photosensitive drum will decrease. Summary of the Utility Model

[0005] In view of this, the utility model provides a drum cartridge adopting the following technical solution, which can effectively remove the remaining toner on the surface of the charging member while effectively preventing the charging efficiency of the charging member for the photosensitive drum from decreasing. The specific solution is as follows:

[0006] A drum cartridge, applicable to an imaging device, the drum cartridge comprising: a drum housing; a photosensitive drum rotatably disposed in the drum housing, the rotation axis of which extends in the longitudinal direction; a charging member rotatably disposed in the drum housing, in contact with the photosensitive drum and configured to charge the surface of the photosensitive drum; a first conductive member having a power receiving portion for receiving power from the imaging device, the first conductive member supplying power to the charging member; a driving force transmission device for transmitting a driving force between the photosensitive drum and the charging member, the driving force transmission device comprising: a first driving member configured to rotate following the rotation of the photosensitive drum; a second driving member coaxially disposed with the charging member and cooperating with the first driving member for receiving the driving force from the first driving member to drive the charging member to rotate; in a state where the drum cartridge is installed at a predetermined position of the imaging device, the power receiving portion faces upward.

[0007] In some embodiments, both the first driving member and the second driving member are configured as gears.

[0008] In some embodiments, one of the first driving member and the second driving member is configured as a protrusion, and the other is configured as a groove cooperating with the protrusion.

[0009] In some embodiments, the drum cartridge further comprises spacer members disposed at two longitudinal ends of the charging member, the spacer members being configured to adjust the contact pressure between the photosensitive drum and the charging member.

[0010] In some embodiments, the charging member comprises a rotating shaft and a coating layer coated on the outer side in the radial direction of the rotating shaft, the coating layer being configured to contact the surface of the photosensitive drum, and the outer diameter of the spacer member is smaller than the outer diameter of the coating layer.

[0011] In some embodiments, the charging member comprises a rotating shaft and a coating layer coated on the outer side in the radial direction of the rotating shaft, the coating layer being configured to contact the surface of the photosensitive drum, and the hardness of the spacer member is greater than the hardness of the coating layer.

[0012] In some embodiments, the drum cartridge further comprises a cleaning member extending in the longitudinal direction, the cleaning member being in contact with the surface of the charging member.

[0013] The present utility model further provides a processing cartridge, the processing cartridge comprising a developing cartridge and the drum cartridge as described above; the developing cartridge comprising: a developing housing for storing toner; a developing roller rotatably disposed in the developing housing for carrying the toner and supplying the toner to the photosensitive drum.

[0014] In some embodiments, the processing cartridge further comprises: a second conductive member for receiving power from the imaging device and supplying the power to the developing roller; the orientation of the power receiving portion is not parallel to the surface of the second conductive member for receiving power.

[0015] In some embodiments, the processing cartridge further includes: a first conductive member having a power receiving portion for receiving power from the imaging device, the first conductive member supplying power to the charging member; a chip storing parameter information of the processing cartridge and having an electrical contact portion for making electrical contact with a stylus in the imaging device, the parameter information being obtainable by the imaging device through electrical contact between the electrical contact portion and the stylus; in a state where the processing cartridge is installed at a predetermined position of the imaging device, the orientations of both the electrical contact portion and the power receiving portion are upward. Description of the Drawings

[0016] Figure 1 is a perspective view of the processing cartridge according to Embodiment 1 of the present invention.

[0017] Figure 2 is a perspective view of the processing cartridge according to Embodiment 1 of the present invention with the developing housing and the drum housing hidden.

[0018] Figure 3 is a cross-sectional view taken along the Figure 1 AA direction in

[0019] Figure 4A is a side view of the photosensitive drum, the charging member, and the driving force transmission device according to Embodiment 2 of the present invention, observed in a direction perpendicular to the longitudinal direction.

[0020] Figure 4B is a side view of the driving force transmission device according to Embodiment 2 of the present invention, observed in the longitudinal direction.

[0021] Figure 5A is a side view of the photosensitive drum, the charging member, and the driving force transmission device according to Embodiment 3 of the present invention, observed in a direction perpendicular to the longitudinal direction.

[0022] Figure 5B is a side view of the driving force transmission device according to Embodiment 3 of the present invention, observed in the longitudinal direction. Detailed Description of the Embodiments

[0023] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] [Embodiment 1]

[0025] (Overall Structure of the Processing Cartridge)

[0026] As shown in Figure 1As shown, the processing cartridge C includes a developing cartridge 100, a drum cartridge 200, a first end cap 300, and a second end cap 400. The first end cap 300 and the second end cap 400 are respectively located at both ends of the processing cartridge C. The developing cartridge 100 includes a developing housing 11 and a developing roller 12 rotatably provided in the developing housing 11. The drum cartridge 200 includes a drum housing 21 and a photosensitive drum 22 rotatably provided in the drum housing 21. Under the action of the electric field force between the developing roller 12 and the photosensitive drum 22, the developing roller 12 is used to supply the toner stored in the developing housing 11 to the photosensitive drum 22, so that the electrostatic latent image formed on the surface of the photosensitive drum 22 is developed. The developing housing 11 and the drum housing 21 are directly or indirectly connected through the first end cap 300 and the second end cap 400. In this way, the developing cartridge 100 and the drum cartridge 200 are combined with each other.

[0027] Furthermore, the processing cartridge C further includes a driving force receiving assembly (including at least one of a first driving force receiving member 15 and a second driving force receiving member 222). The driving force receiving assembly is used to receive the driving force from the driving force output member in the imaging device to directly or indirectly drive the developing roller 12 and the photosensitive drum 22 to rotate.

[0028] To make the following description clearer, it is defined that the rotation axis of the developing roller 12 or the rotation axis of the photosensitive drum 22 extends in the longitudinal direction. The side where the driving force receiving assembly is provided is the left side / driving side, the side opposite to the left side is the right side / non-driving side, the direction intersecting the longitudinal direction is the transverse direction, and the direction intersecting both the longitudinal direction and the transverse direction is the vertical direction. Specifically, the transverse direction is parallel to the arrangement direction of the developing housing 11 and the drum housing 21, or the transverse direction is parallel to the arrangement direction of the developing roller 12 and the photosensitive drum 22. The developing housing 11 is located behind the drum housing 21, or in other words, the developing roller 12 is located behind the photosensitive drum 22. In the state where the processing cartridge C is installed in the imaging device, the height direction of the processing cartridge C is the vertical direction. The side where the photosensitive drum 22 is provided is the lower side, and the side opposite to the lower side is the upper side.

[0029] (Conductive structure of the charging member)

[0030] Such as Figure 2 and Figure 3As shown, the processing cartridge C further includes a first conductive member 24, a second conductive member 28, a power transmission member, and a charging member 23 rotatably disposed in the drum housing 21. The first conductive member 24 is configured to receive power from the imaging device and supply the power to the charging member 23. The second conductive member 28 is configured to receive power from the imaging device and supply the power to the developing roller 12. The charging member 23 is configured to charge (apply charges to) the surface of the photosensitive drum 22, and includes a rotating shaft 232 and a coating layer 231 coated on the radially outer side of the rotating shaft 232. The coating layer 231 contacts the surface of the photosensitive drum 22. With the rotation of the photosensitive drum 22, under the action of the frictional force between the photosensitive drum 22 and the coating layer 231, the charging member 23 also starts to rotate.

[0031] As Figure 1 As shown, the processing cartridge C further includes a chip 6 configured to establish a communication connection with the imaging device. The chip 6 stores parameter information of the processing cartridge C (such as at least one of the model, service life, manufacturer, etc. of the processing cartridge C), and is provided with at least one electrical contact portion 61. The electrical contact portion 61 is configured to make electrical contact with a stylus in the imaging device, so that the imaging device can obtain the parameter information.

[0032] Generally, the coating layer 231 is made of an elastic conductive material, and the rotating shaft 232 is also made of a conductive material. The first conductive member 24 has a power receiving portion 241 configured to receive power from the imaging device and a power contact portion 242 configured to make electrical contact with the power transmission member. The power transmission member is configured to transmit the power received by the power receiving portion 241 to the charging member 23. In this embodiment, in a state where the drum cartridge 200 / processing cartridge C is installed at a predetermined position of the imaging device, the orientations of both the electrical contact portion 61 and the power receiving portion 241 are upward. The second conductive member 28 is configured to receive power from the imaging device to directly or indirectly supply the power to the developing roller 12.

[0033] Continuing as Figure 2 As shown, the processing cartridge C further includes a left support member 26L, a right support member 26R, a left elastic member 25L, and a right elastic member 25R. The charging member 23 is rotatably supported by the left support member 26L and the right support member 26R. One end of the left elastic member 25L abuts against the left support member 26L, and one end of the right elastic member 25R abuts against the right support member 26R. Thus, under the action of the elastic forces generated by the left elastic member 25L and the right elastic member 25R, the charging member 23 and the photosensitive drum 22 can maintain close contact. Further, both the right support member 26R and the right elastic member 25R are made of a conductive material. The power transmission member at least includes the right support member 26R and the right elastic member 25R. The power received by the power receiving portion 241 is transmitted to the charging member 23 sequentially through the power contact portion 242, the right elastic member 25R, and the right support member 26R.

[0034] The orientation of the power receiving portion 241 is not parallel to the orientation of the surface of the second conductive member 28 for receiving power. Specifically, the orientation of the surface of the second conductive member 28 for receiving power is parallel to the longitudinal direction. For example, the surface of the second conductive member 28 for receiving power faces rightward, and the power receiving portion 241 faces upward. In this way, the two power output members for supplying power to the power receiving portion 241 and the second conductive member 28 in the imaging device can be separately arranged without interfering with each other; along the longitudinal direction, the power receiving portion 241 is closer to the driving end than the surface of the second conductive member 28 for receiving power. Thus, in the direction intersecting the longitudinal direction, the two power output members will also be arranged in a staggered manner, which is more conducive to preventing the two power output members from interfering with each other.

[0035] (Structure for preventing reduction in charging efficiency of charging member)

[0036] After the electrostatic latent image on the surface of the photosensitive drum 22 is developed by the toner carried by the developing roller 12, the toner on the surface of the photosensitive drum 22 is then transferred to the imaging medium. Although a cleaning blade (not shown) for cleaning the photosensitive drum 22 can also be provided in the drum cartridge 200, there will still be residual toner on the surface of the photosensitive drum 22. With the rotation of the photosensitive drum 22, under the action of the frictional force, the residual toner may be transferred to the surface of the charging member 23 (the surface of the coating layer 231). During the subsequent charging of the photosensitive drum 22 by the charging member 23, these residual toner may reduce the charging efficiency of the charging member 23 for the photosensitive drum 22.

[0037] As Figure 2 shown, the processing cartridge C further includes a driving force transmission device 3 for transmitting the driving force between the photosensitive drum 22 and the charging member 23. Specifically, the driving force transmission device 3 includes a mutually cooperating first driving member 223 and a second driving member 233. Among them, the first driving member 223 is arranged to rotate following the rotation of the photosensitive drum 22, and the second driving member 233 is coaxially arranged with the charging member 23. Preferably, the first driving member 223 is fixedly arranged on the photosensitive drum 22, or rather, the first driving member 223 receives the driving force from the second driving force receiving member 222, and the second driving member 233 is coaxially arranged with the rotating shaft 232. The second driving member 233 receives the driving force from the first driving member 223 to drive the charging member 23 to rotate.

[0038] In this embodiment, the first driving member 223 includes a first main body 2231 and a plurality of driving portions 2232 arranged along the circumference of the first main body 2231. The second driving member 233 includes a second main body 2331 (as Figure 4A shown) and a plurality of driven portions 2332 arranged along the circumference of the second main body 2331. As Figure 2 shown, both the first driving member 223 and the second driving member 233 are arranged as gears, and the driving portions 2232 and the driven portions 2332 mesh with each other.

[0039] In some embodiments, the first driving member 223 and the second driving member 233 are both configured as helical gears to achieve a function of stably transmitting driving force between the first driving member 223 and the second driving member 233 .

[0040] This embodiment can produce the following beneficial effects:

[0041] On the one hand, the driving force for driving the charging member 23 to rotate also includes the force transmitted from the first driving member 223 to the second driving member 233. Accordingly, the friction force can be reduced, and the risk of residual toner adhering to the charging member 23 when the photosensitive drum 22 rotates can be reduced.

[0042] Secondly, the contact pressure between the photosensitive drum 22 and the charging member 23 can be reduced by adjusting at least one of the diameter of the first driving member 223 and the diameter of the second driving member 233 to overcome the elastic force of the elastic member 25L / 25R, thereby reducing the risk of residual toner adhering to the charging member 23.

[0043] [Example 2]

[0044] Different from the first embodiment, one of the driving part 2232 and the driven part 2332 in this embodiment is configured as a protrusion, and the other is configured as a groove that matches the protrusion, such as Figure 4A and Figure 4B As shown, the driving portion 2232 is a groove arranged on the circumference of the first body 2231 , and the driven portion 2332 is a protrusion arranged on the circumference of the second body 2331 .

[0045] In some embodiments, the groove 2232 is configured to be spherical, and the protrusion 2332 is configured to be spherical or conical, etc., which can enter the groove, as long as the driving force can be transmitted between the first driving member 223 and the second driving member 233.

[0046] [Example 3]

[0047] Different from the above-mentioned embodiment, the driving part 2232 and the driven part 2332 in this embodiment are both configured as protrusions. For example, the driving part 2232 and the driven part 2332 are both configured as protruding strips, such as Figure 5A and Figure 5B As shown, when cut along the radial direction of the first driving member 223 / the second driving member 233 , the cross-sectional shape of the driving portion 2232 and the driven portion 2332 is a triangle or a trapezoid or other irregular shapes.

[0048] In some embodiments, when both the driving part 2232 and the driven part 2332 are provided as straight teeth or protrusions similar to straight teeth, during the process of transmitting the driving force by the driving part 2232 and the driven part 2332, no component of the driving force will be generated in the longitudinal direction. Therefore, the risk of the photosensitive drum 22 and the charging member 23 moving in the longitudinal direction can be eliminated.

[0049] [Embodiment 4]

[0050] Based on the above embodiments, as Figure 2 and Figure 3 shown, the drum cartridge 200 involved in this embodiment further includes a cleaning member 27 that contacts the surface of the charging member 23 (the surface of the coating layer 231). The cleaning member 27 extends in the longitudinal direction and is used to remove the residual toner attached to the surface of the charging member 23. Even if there is a restraining force that inhibits the rotation of the cleaning member 27 between the cleaning member 27 and the surface of the charging member 23, due to the provision of the above-mentioned driving force transmission device 3, the charging member 23 can still rotate at a predetermined speed, that is, the angular velocity ratio between the charging member 23 and the photosensitive drum 22 will still remain unchanged.

[0051] [Embodiment 5]

[0052] Based on the above embodiments, the drum cartridge 200 in this embodiment further includes spacers 4 provided at both longitudinal ends of the charging member 23. Specifically, the spacers 4 are sleeves installed on the charging member 23, and the outer diameter of the spacers 4 is smaller than the outer diameter of the coating layer 231. In this way, the spacers 4 can be used to adjust the contact pressure between the photosensitive drum 22 and the charging member 23 to reduce the risk of the residual toner on the surface of the photosensitive drum 22 adhering to the charging member 23.

[0053] In some embodiments, the hardness of the spacers 4 is greater than the hardness of the coating layer 231 to more effectively adjust the contact pressure between the photosensitive drum 22 and the charging member 23.

[0054] Since the photosensitive drum 22 is made of a metal material and the coating layer 231 is made of an elastic material, under the action of the contact pressure between the photosensitive drum 22 and the charging member 23, the coating layer 231 will undergo elastic deformation. Therefore, it should be understood that the adjustment of the contact pressure between the photosensitive drum 22 and the charging member 23 can also be understood as the adjustment of the elastic deformation amount of the charging member 23 / coating layer 231.

[0055] [Other Explanations]

[0056] Based on the inventive concept of the present utility model, the driving force can be transmitted between the first driving member 223 and the second driving member 233 in a direct contact manner, or can also be transmitted through an intermediate member. For example, the driving force is transmitted between them by means of chain drive, belt drive, etc. In addition, the first driving member 223 and the second driving member 233 can also transmit the driving force in a non-contact manner. For example, the driving force is transmitted between them by means of magnetic drive, as long as it can ensure that the angular velocity ratio between the charging member 23 and the photosensitive drum 22 remains unchanged.

[0057] Continuing as Figure 2 shown, the processing cartridge C further includes a stirring member 14, a powder feeding roller 13 and a driving force transmission assembly 16 provided in the developing cartridge 100. The driving force transmission assembly 16 is used to receive the driving force of the first driving force receiving member 15 and transmit the driving force to the stirring member 14, the powder feeding roller 13 and the developing roller 12. Among them, the driving force transmission assembly 16 includes a first driving force transmission portion 161, a second driving force transmission portion 162, a third driving force transmission portion 163, a fourth driving force transmission portion 164 and a fifth driving force transmission portion 165. The third driving force transmission portion 163 is coaxially arranged with the stirring member 14, the fourth driving force transmission portion 164 is coaxially arranged with the powder feeding roller 13, and the fifth driving force transmission portion 165 is coaxially arranged with the developing roller 12. The first driving force transmission portion 161 is used to directly or indirectly transmit the driving force to the fifth driving force transmission portion 165, and the second driving force transmission portion 162 is used to directly or indirectly transmit the driving force to the third driving force transmission portion 163 and the fourth driving force transmission portion 164.

[0058] In some embodiments, the first driving force transmission portion 161 and the second driving force transmission portion 162 are coaxially arranged. That is to say, the first driving force transmission portion 161 and the second driving force transmission portion 162 will directly receive the driving force from the first driving force receiving member 15. Thus, the overall structure of the driving force transmission assembly 16 can be optimized.

[0059] In some embodiments, the driving force transmission assembly 16 can also be provided with a sixth driving force transmission portion (not shown) coaxial with the first driving force transmission portion 161 and the second driving force transmission portion 162. Along the direction from left to right, the diameters of the first driving force transmission portion 161, the second driving force transmission portion 162 and the sixth driving force transmission portion decrease in sequence. At this time, the first driving force transmission portion 161 can be directly combined with the fifth driving force transmission portion 165, the second driving force transmission portion 162 can be directly combined with the fourth driving force transmission portion 164, and the sixth driving force transmission portion can be directly combined with the third driving force transmission portion 163. Since the diameter of the sixth driving force transmission portion is the smallest, the third driving force transmission portion 163 will have higher design freedom and installation freedom.

[0060] In addition, when the processing cartridge C is installed in the imaging device and the processing cartridge C needs to be developed, the developing roller 12 and the photosensitive drum 22 are in contact with each other. However, when the processing cartridge C does not need to be developed, in order to prevent the developing roller 12 and the photosensitive drum 22 from being in contact with each other for a long time and the surface of the photosensitive drum 22 from being contaminated by the toner carried by the developing roller 12, the developing roller 12 and the photosensitive drum 22 need to be separated from each other to prevent the toner carried by the developing roller 12 from reaching the surface of the photosensitive drum 22.

[0061] In some embodiments, as Figure 2 shown, the processing cartridge C further includes a separating mechanism 5 that is movably arranged. The separating mechanism 5 is used to receive the separating force applied by a force-applying member in the imaging device. When the processing cartridge C does not need to be developed, the force-applying member applies a separating force to the separating mechanism 5, forcing one of the developing housing 11 and the drum housing 21 to move relative to the other, thereby separating the developing roller 12 and the photosensitive drum 22 from each other.

[0062] In some embodiments, an electric adjustment device may also be provided in the processing cartridge C. When the processing cartridge C does not need to be developed, the electric adjustment device is used to control the developing roller 12 to be grounded, so that the electric field force between the developing roller 12 and the photosensitive drum 22 is not sufficient to cause the toner carried by the developing roller 12 to reach the surface of the photosensitive drum 22, and it can also prevent the surface of the photosensitive drum 22 from being contaminated by the toner carried by the developing roller 12.

[0063] It is known that when the processing cartridge C is installed at a predetermined position in the imaging device, the photosensitive drum 22 also needs to be electrically connected to the grounding member of the imaging device. In this way, when the surface of the photosensitive drum 22 is irradiated by the laser beam carrying imaging information emitted by the imaging device, an electrostatic latent image is formed at the irradiated part, and the toner carried by the developing roller 12 can reach the area where the electrostatic latent image is located under the action of the electric field force. Therefore, based on the inventive concept of the above deformation method, the electric adjustment device can also be used to control whether the photosensitive drum 22 is grounded to achieve the purpose of preventing the toner carried by the developing roller 12 from reaching the surface of the photosensitive drum 22. For example, when the processing cartridge C does not need to be developed, the electric adjustment device controls the photosensitive drum 22 not to be grounded. In this way, the electric field force between the developing roller 12 and the photosensitive drum 22 is also not sufficient to cause the toner carried by the developing roller 12 to reach the surface of the photosensitive drum 22.

[0064] In the processing cartridge C provided with the electric adjustment device, when the processing cartridge C does not develop, the developing housing 11 and the photosensitive housing 21 no longer need to move relative to each other, and thus there is no need to provide the separating mechanism 5. Therefore, the structure of the processing cartridge C can be simplified.

[0065] In some embodiments, at least one of the first end cap 300 and the second end cap 400 may also be integrally formed with at least one of the developing housing 11 and the drum housing 21, and this design can also simplify the structure of the processing cartridge C.

[0066] In some embodiments, the developing cartridge 100 and the drum cartridge 200 may also be separately provided, that is, the developing cartridge 100 and the drum cartridge 200 are no longer combined with each other through the first end cap 300 and the second end cap 400, but are combined in a detachable manner. At this time, the developing cartridge 100 and the drum cartridge 200 may be combined with each other before being installed in the imaging device, and then installed in the imaging device as a whole, or the drum cartridge 200 may be first installed in the imaging device, and then the developing cartridge 100 may be detachably installed on the drum cartridge 200, or the drum cartridge 200 may be fixed in the imaging device, and the user only needs to install and remove the developing cartridge 100 each time. Therefore, whether the developing cartridge 100 is provided or not, the driving force transmission device 3 of the present invention can be applied to the drum cartridge 200.

Claims

1. A drum cartridge, suitable for an imaging device, characterized in that: Drum Cartridge Includes: Drum shell; a photosensitive drum rotatably disposed in the drum housing with its rotation axis extending in the longitudinal direction; A charging member is rotatably disposed in the drum housing, contacts the photosensitive drum, and is used to charge the surface of the photosensitive drum; a first conductive member having a power receiving portion for receiving power from the image forming device, the first conductive member supplying power to the charging member; A driving force transmission device, used for transmitting driving force between the photosensitive drum and the charging member, the driving force transmission device comprising: A first driving member, configured to rotate following the rotation of the photosensitive drum; The second driving member is coaxially arranged with the charging member and cooperates with the first driving member to receive the driving force from the first driving member to drive the charging member to rotate; In a state where the drum cartridge is mounted to a predetermined position of the image forming apparatus, the electric-power receiving portion faces upward.

2. The drum cartridge according to claim 1, characterized in that The first driving member and the second driving member are both configured as gears.

3. The drum cartridge according to claim 1, characterized in that One of the first driving member and the second driving member is configured as a protrusion, and the other is configured as a groove matched with the protrusion.

4. The drum cartridge according to claim 1, wherein: The drum cartridge further includes spacers provided at both ends of the charging member in the longitudinal direction, the spacers being used to adjust the contact pressure between the photosensitive drum and the charging member.

5. The drum cartridge according to claim 4, characterized in that The charging member includes a rotating shaft and a covering layer covering the radially outer side of the rotating shaft, wherein the covering layer is used to contact the surface of the photosensitive drum, and the outer diameter of the spacer is smaller than the outer diameter of the covering layer.

6. The drum cartridge according to claim 4, characterized in that The charging member includes a rotating shaft and a covering layer covering the radially outer side of the rotating shaft, wherein the covering layer is used to contact the surface of the photosensitive drum, and the hardness of the spacer is greater than that of the covering layer.

7. The drum cartridge according to any one of claims 1 to 6, characterized in that: The drum cartridge further includes a cleaning member extending in a longitudinal direction and contacting a surface of the charging member.

8. A process cartridge, characterized in that The process cartridge comprises a developing cartridge and a drum cartridge according to any one of claims 1 to 7; the developing cartridge comprises: A developing housing for storing toner; The developing roller is rotatably arranged in the developing housing, and is used for carrying carbon powder and supplying carbon powder to the photosensitive drum.

9. The process cartridge according to claim 8, wherein: The process box also includes: a second conductive member for receiving power from the image forming device and supplying the power to the developing roller; The direction of the power receiving portion is not parallel to the direction of the surface of the second conductive member for receiving power.

10. The process cartridge according to claim 8, wherein: The process box also includes: a first conductive member having a power receiving portion for receiving power from the image forming device, the first conductive member supplying power to the charging member; A chip storing parameter information of the process cartridge, having an electrical contact portion for electrically contacting a contact pin in an imaging device, wherein the imaging device can obtain the parameter information through the electrical contact portion electrically contacting the contact pin; In a state where the process cartridge is mounted to a predetermined position of the image forming apparatus, the orientation of the electric contact portion and the orientation of the electric-power receiving portion are both upward.

Images