Drum cartridge, process cartridge, and electrophotographic image forming apparatus

Abstract

The utility model provides a drum box, a processing box and electrophotographic imaging equipment, the drum box comprises a photosensitive drum and a drum frame, the drum frame comprises two side plates distributed along the axial direction of the photosensitive drum, and one side of each side plate back to the photosensitive drum is provided with a supporting part and a clamping part; in the installation direction of the drum box, the photosensitive drum is rotationally connected with the downstream ends of the two side plates, the clamping part is located at the downstream end of the supporting part, and the top of the upstream end of the supporting part is provided with an abutting supporting face. A positioning supporting surface is arranged at the bottom of the supporting part, and the clamping part downwards protrudes out of the positioning supporting surface; in the installation direction, the positioning supporting face extends to the upstream end of the supporting part, or the bottom of the upstream end of the supporting part is provided with an inclined face inclined to the installation direction, the downstream end of the inclined face is located on the upper side of the extending face of the positioning supporting face, and the free end of the inclined face is located on the extending face or located on the lower side of the extending face. The processing box is provided with the drum box, the processing box is arranged in the electrophotographic imaging equipment, and the drum box has the advantages of optimized stress, high compatibility and low production cost.

Description

Technical Field

[0001] The utility model relates to the technical field of electrophotographic imaging, and specifically, to a processing cartridge provided with a drum cartridge, an electrophotographic imaging device provided with the above-mentioned processing cartridge, and an electrophotographic imaging device provided with the above-mentioned processing cartridge. Background Art

[0002] An electrophotographic imaging device (such as a laser printer) is a device that forms an image on an image forming medium (such as paper) by using the principle of electrophotography and at least going through the processes of charging, exposure, development, transfer, fixing, and cleaning. The material device of the printing consumables used on the electrophotographic imaging device is generally called a processing cartridge. The setting of the processing cartridge enables users to maintain the electrophotographic imaging device to a certain extent by themselves without relying on professional maintenance personnel, thereby improving the convenience of using the electrophotographic imaging device.

[0003] As Figure 1 and Figure 2 shown, a type of existing processing cartridge 9 includes a developing cartridge 91 and a drum cartridge 92. Among them, the developing cartridge 91 and the drum cartridge 92 are detachably connected. The developing cartridge 91 includes a cartridge body 911, a developing roller 912 installed on the cartridge body 911, etc. A guiding member 913 is provided at one end of the side portion of the cartridge body 911 close to the developing roller 912, and a supported member 914 is provided at one end of the side portion of the cartridge body 911 away from the developing roller 912; the drum cartridge 92 includes a drum frame 921, a photosensitive drum 922 installed on the drum frame 921, etc. A guiding groove 9212 is provided at one end of the inner side of the side plate 9211 of the drum frame 921 close to the photosensitive drum 922, a supporting surface 9213 is provided at the top of the end of the side plate 9211 of the drum frame 921 away from the photosensitive drum 922, and a protruding structure 9214 is provided at the bottom. When the developing cartridge 91 and the drum cartridge 92 are assembled, the guiding member 913 on the cartridge body 911 is slidably inserted into the guiding groove 9212 on the side plate 9211 of the drum frame 921 to guide the developing roller 912 to move towards the photosensitive drum 922 until the developing roller 912 is adjacent to the photosensitive drum 922; when the developing cartridge 91 is assembled onto the drum frame 921, the supported member 914 on the cartridge body 911 is adjacent to the supporting surface 9213 on the side plate 9211 of the drum frame 921, so that the supporting surface 9213 supports the cartridge body 911 through the supported member 914; when the processing cartridge 9 is installed in the electrophotographic imaging device, the positioning guide rail 93 and the pressing member 94 in the electrophotographic imaging device cooperate to fix the processing cartridge 9, so that the developing cartridge 91 is pressed tightly on the drum frame 921, and the protruding structure 9214 on the drum frame 921 abuts against the card slot 931 of the positioning guide rail 93. At this time, the force-bearing situation of the processing cartridge 9 is as follows:

[0004] First, since the surface of the developing roller 912 is elastic and the developing roller 912 needs to be in close contact with the photosensitive drum 922 during operation, in this case, the developing roller 912 will be subjected to a backward reaction force Fb, causing a tendency for the developing roller 912 and the photosensitive drum 922 to separate from each other. In addition, when the photosensitive drum 922 rotates driven by the driving force within the electrophotographic imaging device, the developing roller 912 will be driven by the photosensitive drum 922 to rotate synchronously. Therefore, a rotational torque M will be generated in the direction of the line L connecting the axes of the photosensitive drum 922 and the developing roller 912. The rotational torque M will cause the rear end of the developing cartridge 91 to tend to swing upward with the guiding member 913 as a fulcrum and will also cause the developing cartridge 91 to retract, thus resulting in a tendency for the developing roller 912 and the photosensitive drum 922 to separate from each other.

[0005] Second, under the action of the pressing member 94 within the electrophotographic imaging device, the supporting member 914 of the processing cartridge 9 will be subjected to an inclined downward force and thus abut against the supporting surface 9213 of the drum holder 921, causing the supporting surface 9213 to be subjected to a pressure F composed of the gravity of the developing cartridge 91 and the force applied by the pressing member 94. The pressure F can be decomposed into a first pressure F1 perpendicular to the supporting surface 9213 and a second pressure F2 parallel to the supporting surface 9213. Since there is a certain distance between the supporting member 914 and the guiding member 913, under the action of the first pressure F1, the developing cartridge 91 generates a downward rotational torque to resist the rotational torque M. At the same time, the second pressure F2 can resist the reaction force Fb. In addition, since the supporting member 914 is in contact with the supporting surface 9213, the supporting surface 9213 will simultaneously generate a backward reaction force F3 on the supporting member 914 to prevent the supporting member 914 from moving forward, but the reaction force F3 can be offset by changing the friction angle between the supporting member 914 and the supporting surface 9213.

[0006] Furthermore, the convex structure 9214 on the drum rack 921 will engage and abut against the card slot 931 on the positioning guide rail 93 to support the processing cartridge 9. However, when the convex structure 9214 engages and abuts against the card slot 931, under the influence of the card slot 931, the convex structure 9214 will receive a supporting force F4 from the inclined plane of the card slot 931. And when the pressure F is greater, the corresponding supporting force F4 received by the convex structure 9214 will also be greater. The supporting force F4 will be decomposed into a third component force F5 in the horizontal direction and a fourth component force F6 in the vertical direction, thereby forcing the processing cartridge 9 and the positioning guide rail 93 to abut tightly against each other. However, during the actual operation of the processing cartridge 9, the processing cartridge 9 usually needs to have a certain buffer movement space to ensure the normal operation of the processing cartridge 9. However, due to the influence of the third component force F5, the convex structure 9214, the card slot 931, etc., it is easy for the processing cartridge 9 to be overly fixed on the positioning guide rail 93, resulting in insufficient or disappearance of the buffer movement space between the drum cartridge 92 and the positioning guide rail 93, thereby affecting the imaging quality. In addition, the design of the convex structure 9214 will increase the structural complexity of the drum rack 921, thereby increasing the production difficulty and production cost. Moreover, the setting of the convex structure 9214 will also reduce the versatility and compatibility of the processing cartridge 9, thereby increasing the user's usage cost, and whether the convex structure 9214 is too high or too low will also affect the matching accuracy between the processing cartridge 9 and the positioning guide rail 93. Therefore, the existing structural design of the drum rack 921 is not optimized and reasonable enough. Summary of the Invention

[0007] The first object of the present utility model is to provide a drum cartridge with optimized force, strong compatibility and low production cost.

[0008] The second object of the present utility model is to provide a processing cartridge provided with the above-mentioned drum cartridge.

[0009] The third object of the present utility model is to provide an electrophotographic imaging device provided with the above-mentioned processing cartridge.

[0010] To achieve the main object of the present utility model, the present utility model provides a drum cartridge, comprising a photosensitive drum and a drum frame. The drum frame includes two side plates which are distributed along the axial direction of the photosensitive drum. One side of the side plates facing away from the photosensitive drum has a supporting portion and a clamping portion; in the installation direction of the drum cartridge, the photosensitive drum is rotatably connected to the downstream ends of the two side plates respectively. The clamping portion is located at the downstream end of the supporting portion, and the top of the upstream end of the supporting portion has an abutting supporting surface; one side of the side plate facing the photosensitive drum has a developing cartridge guiding groove which is located between the photosensitive drum and the abutting supporting surface; wherein, the bottom of the supporting portion has a positioning supporting surface, and the clamping portion protrudes downward from the positioning supporting surface; in the installation direction, the positioning supporting surface extends to the upstream end of the supporting portion, or the bottom of the upstream end of the supporting portion has an inclined surface which is inclined to the installation direction, and the positioning supporting surface and the inclined surface are distributed in a bent shape. Along the installation direction, the downstream end of the inclined surface is located above the extension surface of the positioning supporting surface, and the upstream end of the inclined surface is located on the extension surface or below the extension surface.

[0011] As can be seen from the above, the supporting portion is used to cooperate with the chute portion of the positioning guide rail in the electrophotographic imaging device through its own positioning supporting surface to achieve the support of the drum cartridge and ensure the matching accuracy between the drum cartridge and the positioning guide rail; the clamping portion is used to cooperate with the clamping portion of the positioning guide rail to achieve the positioning and limiting of the drum cartridge and ensure that the drum cartridge can be accurately installed on the machine; the developing cartridge guiding groove is used to cooperate with the guiding member on the developing cartridge to guide the developing roller of the developing cartridge into contact with the photosensitive drum; and through the design of the positioning supporting surface or the inclined surface, it can be avoided that it contacts with the card slot on the positioning guide rail, optimize the force on the drum cartridge, and then there is a certain buffer space between the installed drum cartridge and the positioning guide rail, ensuring the imaging quality and the reliability of the work. Moreover, the design of the positioning supporting surface or the inclined surface can simplify and optimize the structure of the drum frame, reduce its production difficulty and production cost, and also improve the versatility and compatibility of the drum cartridge and the processing cartridge provided with this drum cartridge, reducing the user's use cost.

[0012] A preferred solution is that among the two supporting portions, the positioning supporting surface of one supporting portion extends to the downstream end of this supporting portion, and the other supporting portion has an inclined surface.

[0013] As can be seen from the above, the structures of the two supporting portions can be flexibly changed to better adapt to different models of electrophotographic imaging devices, thereby enhancing the versatility and compatibility of the drum cartridge and the processing cartridge provided with this drum cartridge, etc.

[0014] Another preferred solution is that the developing cartridge guiding groove extends from the top surface of the supporting portion to the bottom surface of the supporting portion and towards the photosensitive drum in an inclined manner to the installation direction.

[0015] As can be seen from the above, this design can keep the developing roller of the developing cartridge in close contact with the photosensitive drum on the drum frame, thereby ensuring the imaging quality and ensuring the compactness and reliability of the assembly between the developing cartridge and the drum frame.

[0016] Another preferred solution is that the drum holder further includes a holding member, the holding member is connected between the two side plates, a biasing mechanism is provided on the holding member, and a clamping position is formed among the two side plates, the holding member, the biasing mechanism and the developing cartridge guiding groove; a holding portion is formed on the holding member; along the installation direction, the holding member is located at the upstream end of the supporting portion.

[0017] As can be seen from the above, the design of the holding member and the holding portion thereon makes it more convenient to load and unload the processing cartridge provided with this drum holder; the biasing mechanism is used to cooperate with the developing cartridge guiding groove to enable the developing roller of the developing cartridge installed on the drum holder to be in close contact with the photosensitive drum on the drum holder, thereby ensuring the imaging quality.

[0018] A further solution is that the biasing mechanism includes a push block and an elastic member, the push block is slidably connected to the holding member, the elastic member is connected between the push block and the holding member, and the elastic member forces the push block to move towards the upstream end of the supporting portion.

[0019] As can be seen from the above, through the design of the biasing mechanism, the developing roller of the developing cartridge installed on the drum holder can be in close contact with the photosensitive drum on the drum holder.

[0020] Another preferred solution is that a photosensitive drum gear is installed at one end of the photosensitive drum; the photosensitive drum gear is provided with a driving force receiving head, and the driving force receiving head penetrates through the side plate arranged close to the photosensitive drum gear.

[0021] As can be seen from the above, this design enables the photosensitive drum to be accurately linked with the developing roller, and enables the electrophotographic imaging device to drive the photosensitive drum to rotate through the driving force receiving head.

[0022] Another preferred solution is that the clamping portion is in the shape of an annular column, and the end of the photosensitive drum or the photosensitive drum gear is rotatably connected to the clamping portion.

[0023] As can be seen from the above, the shape design of the clamping portion is beneficial to optimizing the structure of the drum holder and better supporting the photosensitive drum and the photosensitive drum gear.

[0024] A further solution is that the drum cartridge further includes a charging roller, a waste powder bin, a cleaning blade and a cleaning roller, the charging roller is installed between the two side plates, the charging roller charges the photosensitive drum, the waste powder bin is installed on the drum holder, the photosensitive drum is located at the entrance of the waste powder bin, the cleaning blade is installed on the drum holder and / or the waste powder bin, the edge of the cleaning blade is adjacent to the photosensitive drum, the edge of the cleaning blade and the waste powder bin enclose an entrance, the first end of the cleaning roller is installed on the first side plate, the second end of the cleaning roller is installed on the second side plate, and the cleaning roller is adjacent to the charging roller.

[0025] As can be seen from the above, the charging roller is used to charge the photosensitive drum, and cooperate with the light received by the photosensitive drum to form an electrostatic latent image on the surface of the photosensitive drum; the waste powder bin can cooperate with the cleaning blade to recycle the residual waste powder on the photosensitive drum to improve the imaging quality; the cleaning roller is used to remove the waste powder adhered to the charging roller to improve the imaging quality.

[0026] To achieve another object of the present invention, the present invention provides a processing cartridge, including a developing cartridge. The developing cartridge includes a cartridge body and a developing roller. A guiding member and a supported member are provided on the side of the cartridge body. The developing roller is rotatably installed on the cartridge body. Among them, the processing cartridge further includes the above-mentioned drum cartridge. The cartridge body is installed on the drum rack. The guiding member is slidably inserted into the guiding groove of the developing cartridge. The supported member is adjacent to the abutting support surface. The developing roller can be adjacent to the photosensitive drum.

[0027] As can be seen from the above, the processing cartridge provided with the above-mentioned drum cartridge can optimize its own force in the electrophotographic imaging device, make its own structure more optimized and reasonable, and have lower production difficulty and production cost. At the same time, it can also improve its own versatility and compatibility to be applicable to more models of electrophotographic imaging devices.

[0028] To achieve another object of the present invention, the present invention provides an electrophotographic imaging device, including a body. A processing cartridge installation cavity is provided inside the body. A positioning guide rail and a pressing member are provided in the processing cartridge installation cavity. The positioning guide rail has a chute portion and a clamping portion. The clamping portion is located at the end of the chute portion. Among them, the above-mentioned processing cartridge is installed in the processing cartridge installation cavity. The support portion is slidably inserted into the chute portion. The positioning support surface is adjacent to the chute portion. The clamping portion is clamped in the clamping portion. The pressing member abuts against the supported member and cooperates with the positioning guide rail to fix the processing cartridge.

[0029] As can be seen from the above, by setting the above-mentioned processing cartridge, the force of the processing cartridge in the electrophotographic imaging device can be optimized, the imaging quality can be improved, and at the same time, the user's usage cost can be reduced and the user's experience can be improved. Description of the Drawings

[0030] Figure 1 It is a cross-sectional view of the assembly of the existing drum cartridge and the positioning guide rail.

[0031] Figure 2 It is a schematic diagram of the force of the existing drum cartridge.

[0032] Figure 3 It is a schematic diagram of the structure of the assembly of the drum cartridge and the positioning guide rail in the drum cartridge embodiment of the present invention.

[0033] Figure 4 It is a schematic diagram of the structure of the drum cartridge in the first perspective of the drum cartridge embodiment of the present invention.

[0034] Figure 5It is a schematic structural diagram of the drum cartridge of the embodiment of the utility model drum cartridge from a second perspective.

[0035] The following further describes the present utility model in conjunction with the accompanying drawings and embodiments. Specific embodiments

[0036] Embodiment of the drum cartridge

[0037] Referring to Figures 3 to 5 , the drum cartridge 100 includes a drum frame 1, a photosensitive drum 2, and a charging roller 3. The drum frame 1 includes a frame body 110, a holding member 12, and a biasing mechanism 13; the frame body 110 includes two side plates 11 and a connecting plate. The two side plates 11 are axially distributed at both ends of the photosensitive drum 2 along the axis X of the photosensitive drum, and the connecting plate is connected between the two side plates 11. Among them, the two side plates 11 and the connecting plate can be integrally formed or a split assembly structure. Along the installation direction Y of the drum frame 1 to the electrophotographic imaging device, the connecting plate is preferably located at the downstream end of the side plate 11.

[0038] One side of the side plate 11 facing away from the photosensitive drum 2 has a support portion 111 and a clamping portion 112, and the support portion 111 protrudes from the side plate 11 facing away from the photosensitive drum 2 in the axial direction X of the photosensitive drum 2. The bottom of the support portion 111 has a positioning support surface 1111, and the positioning support surface 1111 is used to cooperate and connect with the guiding support surface 102 of the sliding groove portion on the positioning guide rail 10 in the electrophotographic imaging device to achieve stable support for the drum frame 1. Among them, as an optional solution, along the installation direction Y of the drum frame 1, the positioning support surface 1111 extends from the downstream end of the support portion 111 to the upstream end of the support portion 111, that is, the entire bottom surface of the support portion 111 is the positioning support surface 1111; and as another optional solution, in the installation direction Y of the drum frame 1, the bottom of the upstream end of the support portion 111 has an inclined surface 1112, the inclined surface 1112 is inclined to the installation direction Y, and the positioning support surface 1111 and the inclined surface 1112 are bent. In addition, along the installation direction Y, the downstream end of the inclined surface 1112 is located above the positioning support surface 1111, and the upstream end of the inclined surface 1112 is located on the extension surface of the positioning support surface 1111 or below the extension surface of the positioning support surface 1111. For example, in this embodiment, the downstream end of the inclined surface 1112 is located below the extension surface of the positioning support surface 1111.

[0039] By setting the positioning support surface 1111 to extend to the downstream end of the support portion 111 or by providing an inclined surface 1112 on the support portion 111, the drum holder 1 can be smoothly installed on the positioning guide rail 10 and is not prone to jamming. At the same time, it can avoid damage to the drum holder 1 and / or the positioning guide rail 10 caused by the influence of jamming. Moreover, this design can simplify the structure of the drum holder 1, reduce the production difficulty and production cost of the drum holder 1, and can improve the versatility and compatibility of the drum holder 1, so that the drum cartridge 100 and the processing cartridge provided with this drum cartridge can be applicable to more models of electrophotographic imaging devices. In addition, compared with the existing raised structure provided at the bottom of the upstream end of the support portion 111, and the raised structure abuts against the card slot 103 on the positioning guide rail 10, in this embodiment, by setting the entire bottom surface of the support portion 111 as the positioning support surface 1111 or by providing an inclined surface at the bottom of the upstream end of the support portion 111, it can effectively avoid the reaction force exerted by the card slot 103 of the positioning guide rail 10 on the drum holder 1, thereby avoiding the drum holder 1 from being overly fixed under the combined action of the positioning guide rail 10 and the pressing member 104 of the electrophotographic imaging device, so as to ensure that the drum cartridge 100 and the processing cartridge provided with this drum cartridge 100 have a certain buffer movement space relative to the positioning guide rail 10, so as to ensure the forming quality and the drum cartridge 100 can work normally and stably.

[0040] It should be noted that both of the two support portions 111 can be provided with only the positioning support surface 1111, that is, the positioning support surfaces 1111 of the two support portions 111 both extend from the downstream end of the support portion 111 to the upstream end of the support portion 111; or, both of the two support portions 111 can be provided with the positioning support surface 1111 and the inclined surface 1112. Of course, as another optional solution, as in this embodiment, the positioning support surface 1111 on the first support portion 111 extends from the downstream end of the support portion 111 to the upstream end of the support portion 111, while the second support portion 111 is provided with the positioning support surface 1111 and the inclined surface 1112. It can be seen that the structures of the two support portions 111 can be flexibly changed to better adapt to different models of electrophotographic imaging devices, so as to improve the versatility and compatibility of the drum cartridge 100 and the processing cartridge provided with this drum cartridge 100, etc.

[0041] Along the installation direction Y of the drum holder 1, the clamping portion 112 is located at the downstream end of the support portion 111. Among them, the clamping portion 112 is preferably in a ring-shaped columnar shape. The clamping portion 112 protrudes away from the photosensitive drum 2 in the axial direction X of the photosensitive drum 2, and the clamping portion 112 protrudes downward from the positioning support surface 1111 of the support portion 111. The clamping portion 112 is used to cooperate and connect with the engaging portion 101 of the positioning guide rail 10 in the electrophotographic imaging device, so that the drum holder 1 can be reliably clamped and assembled into the electrophotographic imaging device. At the same time, the clamping portion 112 also complements the positioning support surface 1111 on the support portion 111 to reduce the possibility of misalignment or movement of the drum holder 1 after being installed in the electrophotographic imaging device.

[0042] In addition, along the installation direction Y of the drum frame 1, the top of the upstream end of the support portion 111 has an abutting support surface 1113, and the abutting support surface 1113 is used to abut against the supported member 105 on the developing cartridge. When the pressing member 105 in the electrophotographic imaging device presses down the supported member 105, the supported member 105 will press down and abut against the abutting support surface 113, thereby applying a pressing force to the processing cartridge to cooperate with the positioning guide 10 to fix the processing cartridge (for the partial force of the processing cartridge, please refer to the background art).

[0043] On one side of the side plate 11 facing the other side plate 11, a developing cartridge guide groove is formed. The developing cartridge guide groove extends from the top surface of the support portion 111 to the bottom surface of the support portion 111 and then to the engaging portion 112, being inclined to the installation direction Y of the drum frame 1. The developing cartridge guide groove is used to cooperate with the guide member on the developing cartridge, so that the developing cartridge can be better assembled onto the drum frame 1, and the developing roller on the developing cartridge can be in close contact with the photosensitive drum 2 on the drum frame 1, ensuring the imaging quality while also ensuring the compactness and reliability of the assembly between the developing cartridge and the drum frame 1.

[0044] The holding member 12 is connected between the two side plates 11. Preferably, along the installation direction Y of the drum frame 1, the holding member 12 is located at the downstream end of the support portion 111 to expand the space between the photosensitive drum 2 and the holding member 12, so that a larger-capacity powder cartridge can be provided for the developing cartridge. Among them, the holding member 12 preferably forms a holding portion 121 at its middle part, making it easier for the user to operate when loading and unloading the drum cartridge 100.

[0045] The biasing mechanism 13 is preferably provided on the holding member 12 and is located on the side of the holding member 12 facing the developing cartridge guide groove; among them, a clamping position is formed among the two side plates 11, the holding member 12, the biasing mechanism 13 and the developing cartridge guide groove, and this clamping position is used to accommodate and fix the developing cartridge. The biasing mechanism 13 is used to cooperate with the developing cartridge guide groove to enable the developing roller of the developing cartridge installed on the drum frame 1 to be in close contact with the photosensitive drum 2 on the drum frame 1, thereby ensuring the imaging quality; preferably, the biasing mechanism 13 includes a push block 131 and an elastic member. The push block 131 is slidably connected to the holding member 12, so that the slider can move towards or away from the clamping position. The elastic member is connected between the push block 131 and the holding member 12, and the elastic member is used to force the push block 131 to move towards the upstream end of the support portion 111, that is, the elastic member is used to force the push block 131 to move towards the developing cartridge in the clamping position, thereby pushing the developing cartridge towards the photosensitive drum 2, so that the developing roller of the developing cartridge can be in close contact with the photosensitive drum 2.

[0046] The first end of the photosensitive drum 2 is rotatably mounted on the first side plate 11, and the second end of the photosensitive drum 2 is rotatably mounted on the second side plate 11; preferably, the photosensitive drum 2 and the annular columnar clamping portion 112 are coaxially arranged, that is, the first end of the photosensitive drum 2 is rotatably connected to the first clamping portion 112, and the second end of the photosensitive drum 2 is rotatably connected to the second clamping portion 112.

[0047] A photosensitive drum gear 21 is mounted on the first end of the photosensitive drum 2. The photosensitive drum gear 21 is used to mesh with a developing roller gear on the developing roller of the developing cartridge, so that the photosensitive drum 2 and the developing roller can rotate synchronously in opposite directions. Preferably, the photosensitive drum gear 21 is provided with a driving force receiving head 22. The driving force receiving head 22 penetrates through the side plate 11 disposed near the photosensitive drum gear 21 and the annular columnar clamping portion 112 on the side plate 11. The driving force receiving head 22 is used to dock with a corresponding driving head in the electrophotographic imaging device, so that the electrophotographic imaging device can drive the photosensitive drum 2 to rotate. The first end of the charging roller 3 is mounted on the first side plate 11, and the second end of the charging roller 3 is mounted on the second side plate 11. The charging roller 3 charges the photosensitive drum 2.

[0048] Preferably, the drum cartridge 100 further includes a waste toner bin 4, a cleaning blade 5, and a cleaning roller 6. The waste toner bin 4 is mounted on the drum frame 1. The cleaning blade 5 is mounted on the drum frame 1 and / or the waste toner bin 4. The blade portion of the cleaning blade 5 is adjacent to the photosensitive drum 2. The blade portion of the cleaning blade 5 and the waste toner bin 4 enclose an inlet. The photosensitive drum 2 is located at the inlet of the waste toner bin 4. The waste toner bin 4 can cooperate with the cleaning blade 5 to recover the residual waste toner on the photosensitive drum 2 to improve the imaging quality. The first end of the cleaning roller 6 is mounted on the first side plate 11, and the second end of the cleaning roller 6 is mounted on the second side plate 11. The cleaning roller 6 is adjacent to the charging roller 3. The cleaning roller 6 is used to remove the waste toner adhered to the charging roller 3 to improve the imaging quality. Preferably, the waste toner bin 4 is provided with a powder dumping port for dumping the recovered waste toner in the waste toner bin 4, thereby extending the service life of the drum cartridge 100; a sealing plug 41 is detachably mounted on the powder dumping port. The sealing plug 41 is used to seal the powder dumping port when the drum cartridge 100 is in a state of not cleaning the waste toner to prevent waste toner leakage, thereby ensuring the imaging quality.

[0049] In summary, through the design of the drum cartridge 100, its structure is more optimized and reasonable, and the production difficulty and production cost are lower. Moreover, the versatility and compatibility of the drum cartridge 100 can be improved, so that the processing cartridge provided with the drum cartridge 100 can be applicable to more models of electrophotographic imaging devices.

[0050] Processing Cartridge Embodiment

[0051] The processing cartridge includes a developing cartridge and the drum cartridge described in the above drum cartridge embodiments. The developing cartridge includes a cartridge body and a developing roller. The developing roller is rotatably mounted on the cartridge body. The cartridge body is preferably detachably mounted to the drum frame. In addition, a guiding member and a supported member are provided on the side of the cartridge body. When the developing cartridge is assembled with the drum cartridge, the guiding member of the cartridge body is slidably inserted into the developing cartridge guiding groove of the drum frame, the supported member abuts against the supporting surface on the supporting portion of the drum frame, and the pushing block of the pushing mechanism on the drum frame presses the cartridge body, so as to force the developing roller to be in close contact with the photosensitive drum. Among them, the developing roller is provided with a developing roller gear meshing with the photosensitive drum gear at the end of the photosensitive drum gear, so that the developing roller can keep relative synchronous rotation with the photosensitive drum through the developing roller gear and the photosensitive drum gear. By providing the above drum cartridge, the structure of the processing cartridge is more optimized and reasonable, and the production difficulty and production cost are lower, and the versatility and compatibility of the processing cartridge can be improved, so that the processing cartridge can be applied to more models of electrophotographic imaging devices.

[0052] Embodiment of electrophotographic imaging device

[0053] The electrophotographic imaging device includes a body, and a processing cartridge installation cavity is provided in the body; wherein, a positioning guide rail and a pressing member are provided in the processing cartridge installation cavity. The positioning guide rail has a chute portion and a clamping portion. Along the installation direction of the drum cartridge, the clamping portion is located at the end (i.e., the downstream end) of the chute portion. The processing cartridge described in the above processing cartridge embodiments is installed in the processing cartridge installation cavity. When the processing cartridge is installed in the processing cartridge installation cavity, the supporting portion of the drum frame is slidably inserted into the chute portion of the positioning guide rail, and the positioning supporting surface of the supporting portion abuts against the guiding supporting surface of the chute portion, while the clamping portion is clamped in the clamping portion to realize the positioning of the drum frame; the pressing member abuts against the supported member of the developing cartridge and cooperates with the positioning guide rail to fix the processing cartridge. It can be seen that by providing the above processing cartridge, the force on the processing cartridge in the electrophotographic imaging device can be optimized, the imaging quality can be improved, and at the same time, the use cost of the user can be reduced and the user experience can be enhanced.

[0054] Finally, it should be emphasized that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A drum box, comprising a photosensitive drum and a drum frame, wherein the drum frame comprises two side plates, the two side plates are distributed along the axial direction of the photosensitive drum, and the side of the side plate facing away from the photosensitive drum has a supporting portion and a clamping portion; In the installation direction of the drum box, the photosensitive drum is rotatably connected to the downstream ends of the two side plates respectively, the clamping portion is located at the downstream end of the supporting portion, and the top of the upstream end of the supporting portion has an abutting supporting surface; The side plate has a developer box guide groove on one side facing the photosensitive drum, and the developer box guide groove is located between the photosensitive drum and the abutting support surface; Features: The bottom of the support portion has a positioning support surface, and the clamping portion protrudes downward from the positioning support surface; In the installation direction, the positioning support surface extends to the upstream end of the support portion, or The bottom of the upstream end of the support portion has an inclined surface, which is inclined to the installation direction. The positioning support surface and the inclined surface are bent. Along the installation direction, the downstream end of the inclined surface is located on the upper side of the extended surface of the positioning support surface, and the upstream end of the inclined surface is located on the extension surface or on the lower side of the extension surface.

2. The drum cartridge according to claim 1, characterized in that: Among the two support parts, the positioning support surface of one support part extends to the downstream end of the support part, and the other support part has the inclined surface.

3. The drum cartridge according to claim 1, characterized in that: The developing cartridge guide groove is inclined with respect to the mounting direction and extends from the top surface of the supporting portion toward the bottom surface of the supporting portion and toward the photosensitive drum.

4. The drum cartridge according to claim 1, wherein: The drum frame further comprises a holding member, the holding member is connected between the two side plates, a biasing mechanism is provided on the holding member, and a clamping position is formed between the two side plates, the holding member, the biasing mechanism and the developing box guide groove; The holding piece is formed with a holding portion; Along the installation direction, the holding member is located at the upstream end of the supporting portion.

5. The drum cartridge according to claim 4, characterized in that: The biasing mechanism comprises: A push block, the push block is slidably connected to the holding piece; An elastic member is connected between the push block and the holding member, and the elastic member forces the push block to move toward the upstream end of the support portion.

6. The drum cartridge according to claim 1, characterized in that: A photosensitive drum gear is installed at one end of the photosensitive drum; The photosensitive drum gear is provided with a driving force receiving head, and the driving force receiving head penetrates the side plate arranged near the photosensitive drum gear.

7. The drum cartridge according to claim 6, characterized in that: The clamping portion is in the shape of an annular column, and the end of the photosensitive drum or the photosensitive drum gear is rotatably connected to the clamping portion.

8. The drum cartridge according to any one of claims 1 to 7, characterized in that: The drum box also includes: A charging roller, which is installed between the two side plates and charges the photosensitive drum; A waste toner bin, wherein the waste toner bin is mounted on the drum frame, and the photosensitive drum is located at the entrance of the waste toner bin; a cleaning scraper, the cleaning scraper being mounted on the drum frame and / or the waste toner bin, the blade of the cleaning scraper being adjacent to the photosensitive drum, and the blade of the cleaning scraper and the waste toner bin forming the inlet; A cleaning roller, wherein a first end of the cleaning roller is mounted on the first side plate, a second end of the cleaning roller is mounted on the second side plate, and the cleaning roller is adjacent to the charging roller.

9. A processing cartridge, comprising a developing cartridge, the developing cartridge comprising a cartridge body and a developing roller, the side of the cartridge body being provided with a guide and a supported member, the developing roller being rotatably mounted on the cartridge body, characterized in that: The processing box also includes a drum box as described in any one of claims 1 to 8, the box body is installed on the drum frame, the guide member is slidably inserted in the developer box guide groove, the supported member is adjacent to the abutment support surface, and the developing roller can be adjacent to the photosensitive drum.

10. An electronic photographic imaging device, comprising a body, a process cartridge installation cavity is provided in the body, a positioning rail and a pressure member are provided in the process cartridge installation cavity, the positioning rail has a slide groove portion and a clamping portion, the clamping portion is located at the end of the slide groove portion, characterized in that: The processing box as described in claim 9 is installed in the processing box installation cavity, the supporting part is slidably inserted in the sliding groove part, the positioning supporting surface is adjacent to the sliding groove part, the clamping part is clamped in the clamping part, and the pressure-applying component abuts against the supported part and cooperates with the positioning guide rail to fix the processing box.

Images