Drum box and processing box

Abstract

This utility model relates to a drum housing and a processing box having the drum housing. The drum housing includes: a drum shell having a support surface; a photosensitive drum rotatably disposed in the drum shell for forming an electrostatic latent image that can be developed by toner; a cleaning blade supported by the support surface and fixedly installed in the drum shell, having a blade for removing residual toner from the surface of the photosensitive drum, with a waste toner receiving cavity formed between the cleaning blade and the drum shell for accommodating residual toner; a cleaning scraper mounted on a mounting surface formed in the drum shell, with a waste toner inlet formed between the cleaning scraper and the blade to allow residual toner to enter the waste toner receiving cavity; and a reference line K2 perpendicular to the support surface is drawn through the rotation axis of the photosensitive drum, with the cleaning scraper and the blade located on the same side of the reference line K2. This design allows the processing box itself to also accommodate residual toner, reducing the quality requirements of the toner, thereby reducing user operating costs and improving user experience.

Description

Technical Field

[0001] This utility model relates to the field of electrophotographic imaging technology, and in particular to a processing box and drum box that can be detachably installed in an imaging device. Background Technology

[0002] A processing cartridge is a consumable that can be detachably installed in electrophotographic imaging devices such as laser printers and copiers. The processing cartridge has a photosensitive drum that can form an electrostatic latent image on its surface. During the imaging process of the processing cartridge, toner develops the electrostatic latent image and then transfers it. However, some toner always remains on the surface of the photosensitive drum (referred to as "residual toner").

[0003] In order not to affect the imaging of the photosensitive drum in the next cycle, the residual toner needs to be removed. Accordingly, the processing box needs to be equipped with a waste toner bin that can hold the residual toner. However, this will increase the volume of the processing box and is not conducive to the miniaturization of the processing box.

[0004] To address this, processing cartridges have been developed to transfer residual toner to storage within imaging devices. However, due to the limited space within imaging devices, the volume of the waste toner storage unit within the imaging device is also strictly limited. Once the quality of the toner (transfer rate) deteriorates, excessive residual toner will cause the waste toner storage unit to become full. Moreover, this method requires a structure to transfer waste toner from the processing cartridge to the waste toner storage unit, making the structure of the imaging device more complex. Utility Model Content

[0005] In view of the above, this utility model provides a drum housing adopting the following technical solution to solve the above-mentioned technical problems. The specific solution is as follows:

[0006] A drum housing includes: a drum shell having a support surface; a photosensitive drum rotatably disposed within the drum shell for forming an electrostatic latent image that can be developed by toner; a cleaning blade supported by the support surface and fixedly mounted within the drum shell, having a blade for removing residual toner from the surface of the photosensitive drum, a waste toner receiving cavity for accommodating residual toner formed between the cleaning blade and the drum shell; a cleaning squeegee mounted on a mounting surface formed within the drum shell, a waste toner inlet formed between the cleaning squeegee and the blade allowing residual toner to enter the waste toner receiving cavity; and a reference line K2 perpendicular to the support surface, passing through the rotation axis of the photosensitive drum, with the cleaning squeegee and the blade located on the same side of the reference line K2.

[0007] In some embodiments, the direction parallel to the rotation axis of the photosensitive drum is the left-right direction, the side with the photosensitive drum is the bottom, and the side without the photosensitive drum is the top; along the up-down direction, the reference line K2 is located below the mounting surface.

[0008] In some implementations, the mounting surface is exposed without any obstruction before the cleaning blade is installed.

[0009] In some embodiments, the direction parallel to the rotation axis of the photosensitive drum is the left-right direction, the side where the photosensitive drum is provided is the lower side, and the side where the photosensitive drum is not provided is the upper side; the drum housing has a main body and a side body, at least a portion of the waste powder receiving cavity is opposite to the main body along the direction intersecting the left-right direction, the side body is located at at least one of the two ends of the main body along the left-right direction; and the reference line K2 is located below the main body along the up-down direction.

[0010] In some implementations, the side with the photosensitive drum is the bottom, and the side without the photosensitive drum is the top. Along the vertical direction, the reference line K2 is located below the cleaning scraper.

[0011] In some embodiments, the cleaning scraper further includes a blade holder connected to the blade, the blade comprising: a connecting surface for connecting to the blade holder; a first surface opposite to the connecting surface along the thickness direction of the blade; a second surface located between the first surface and the connecting surface; and an edge located between the first and second surfaces for contacting the surface of the photosensitive drum to scrape residual toner off the surface of the photosensitive drum; the first surface, the second surface, the connecting surface, and the edge all extend along the length direction of the blade, the second surface also extends along the thickness direction of the blade, and the surface area of ​​the first surface is greater than the surface area of ​​the second surface; along the rotation direction of the photosensitive drum, the first surface is located upstream of the second surface, or the first surface is located downstream of the second surface.

[0012] This utility model also provides a processing box that can be detachably installed to an imaging device. The processing box includes a developing box and a drum box as described above, wherein the developing box and the drum box are combined with each other.

[0013] In some embodiments, the developing cartridge includes a developing housing and a developing roller rotatably disposed within the developing housing. The developing roller is arranged opposite to the photosensitive drum and is used to carry toner contained in the developing housing and supply toner toward the photosensitive drum, thereby developing an electrostatic latent image. When the processing cartridge is in the imaging posture, the rotation axis of the developing roller is located above the rotation axis of the photosensitive drum. A reference line K1 perpendicular to the support surface is drawn through the rotation axis of the developing roller, and the reference line K1 passes through the waste toner inlet.

[0014] In some embodiments, a laser port is formed between the developing housing and the drum housing to allow a laser beam that emits an imaging device and modulates imaging information to pass through, the laser beam irradiating the surface of the photosensitive drum to form an electrostatic latent image; along the direction of travel of the laser beam, the mounting surface is located at the end of the portion of the drum housing opposite the waste powder receiving cavity. Attached Figure Description

[0015] Figure 1A and Figure 1B This is a perspective view of the processing box involved in this utility model.

[0016] Figure 2A and Figure 2B This is a perspective view of the drum box involved in this utility model.

[0017] Figure 2C This is an exploded view of some components of the drum box involved in this utility model after they have been separated from the drum shell.

[0018] Figure 3 This is a perspective view of the first type of cleaning scraper involved in this utility model.

[0019] Figure 4 It is along Figure 1B A cross-sectional view of the box after being cut along the AA direction.

[0020] Figure 5A It is along Figure 1B A cross-sectional view of the drum housing with the first type of cleaning scraper installed, cut along the AA direction.

[0021] Figure 5B This is a schematic diagram showing the relative positions of the first type of cleaning scraper, photosensitive drum, and cleaning blade in the processing box involved in this utility model.

[0022] Figure 6 It is along Figure 1B A cross-sectional view of the drum housing with the second type of cleaning scraper installed, cut along the AA direction.

[0023] Figure 7 It is along Figure 1B A cross-sectional view of the drum housing with the third type of cleaning scraper installed, cut along the AA direction. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0025] [Overall structure of the processing box]

[0026] The processing cartridge 100 can be detachably installed into the imaging device, such as... Figure 1A and Figure 1B As shown, the processing cartridge 100 includes a developing cartridge 10 and a drum cartridge 20 joined together. The developing cartridge 10 includes a developing housing 11 and a developing roller 12 rotatably disposed within the developing housing 11. The developing housing 11 has a toner receiving cavity 10a (e.g., a toner receiving cavity 10a for receiving toner) formed therein. Figure 4 As shown), the drum housing 20 includes a drum housing 21 and a photosensitive drum 22 rotatably disposed in the drum housing 21. The developing roller 11 has a first rotation axis L1, and the photosensitive drum 22 has a second rotation axis L2 parallel to the first rotation axis L1.

[0027] A laser port 40 is formed between the developing housing 11 and the drum housing 21. When the processing box 100 performs imaging, the laser beam modulated with imaging information emitted by the imaging device irradiates the surface of the photosensitive drum 22 through the laser port 40, thereby forming an electrostatic latent image on the surface of the photosensitive drum 22. The developing roller 12 is arranged opposite to the photosensitive drum 22 and is used to carry toner and supply toner to the photosensitive drum 22, so that the toner develops the electrostatic latent image.

[0028] Furthermore, the processing box 100 also includes a driving force receiving component 30, which is used to combine with a driving force output component in the imaging device to receive driving force from the imaging device, thereby directly or indirectly driving the developing roller 11 and the photosensitive drum 21 to rotate.

[0029] In some embodiments, the driving force receiving assembly 30 includes a first driving force receiving element 31 and a second driving force receiving element 32. The first driving force receiving element 31 is combined with a first driving force output element in the imaging device and directly or indirectly drives the developing roller 11 to rotate. The second driving force receiving element 32 is combined with a second driving force output element in the imaging device and directly or indirectly drives the photosensitive drum 21 to rotate.

[0030] In some embodiments, only one of the first driving force receiver 31 and the second driving force receiver 32 may be provided, as long as it enables the developing roller 12 and the photosensitive drum 22 to rotate around their respective rotation axes.

[0031] In some embodiments, the processing cartridge 100 further includes a first end cap 300 and a second end cap 400, the developing cartridge 10 and the drum cartridge 20 are connected through the first end cap 300 and the second end cap 400, and the driving force receiving component 30 is exposed to the outside through the first end cap 300.

[0032] In some embodiments, the first end cap 300 and the second end cap 400 may also be integrally formed with the drum housing 21, so that the first end cap 300 and the second end cap 400 become part of the drum housing 20.

[0033] For ease of description, the orientation of the processing box 100 during imaging in the imaging device is taken as the reference. The following definitions apply: the direction parallel to the first rotation axis L1 or the second rotation axis L2 is the left-right direction / longitudinal direction; the side where the driving force receiving component 30 is located is the right / driving side, and the opposite side is the left / non-driving side; the arrangement direction of the developing box 10 and the drum box 20 is the front-back direction, with the developing box 10 located in front of the drum box 20, and conversely, the drum box 20 located behind the developing box 10; the side where the developing roller 12 and / or the photosensitive drum 22 is provided is the bottom, and conversely, the side where the developing roller 12 and / or the photosensitive drum 22 is not provided is the top; the laser port 40 opens upward, and the laser beam irradiates the photosensitive drum 22 from top to bottom.

[0034] [Drum Box]

[0035] like Figure 2A , Figure 2B and Figure 2C As shown, the drum housing 20 also includes a cleaning scraper 23, a charging component 24, and a cleaning blade 25. The charging component 24 is used to charge the surface of the photosensitive drum 22 so that the electrostatic latent image can be formed after laser beam irradiation. For example, the charging component 24 is configured as a charging roller that contacts the surface of the photosensitive drum 22, and the charging roller is rotatably disposed in the drum housing 21. The charging component 24 can also be configured as a corona wire that does not contact the surface of the photosensitive drum 22, and the corona wire is fixedly disposed in the drum housing 21.

[0036] After the electrostatic latent image developed on the surface of the photosensitive drum 22 is transferred, a small amount of toner will always remain on the surface of the photosensitive drum 22, forming residual toner (referred to as "waste toner T"). The cleaning scraper 25 is fixedly installed in the drum housing 21 and contacts the photosensitive drum 22 to remove the waste toner from the surface of the photosensitive drum 22. The cleaning blade 23 is in the shape of a sheet and contacts the photosensitive drum 22 to prevent waste toner from leaking between the photosensitive drum 22 and the drum housing 21.

[0037] The cleaning scraper 25 includes a blade holder 251 and a blade 252 disposed on the blade holder 251. The blade holder 251 is fixedly mounted to the drum housing 21 through a fixing part 259 disposed therein. The blade 252 is connected to the blade holder 251 and is used to contact the surface of the photosensitive drum 22 to remove waste powder from the surface of the photosensitive drum 22. Along the front-back direction, a waste powder receiving cavity 20a is formed between the cleaning scraper 25 and the drum housing 21 to accommodate waste powder T. A waste powder inlet Q is formed between the cleaning scraper 23 and the blade 252 to allow waste powder T to pass through. The waste powder inlet Q communicates with the waste powder receiving cavity 20a, so that the waste powder T removed by the cleaning scraper can enter the waste powder receiving cavity 20a through the waste powder inlet Q.

[0038] Furthermore, the drum housing 20 also includes a support platform 27 disposed at at least one longitudinal end of the drum housing 21. The support platform 27 has a support surface 271 for supporting the cleaning scraper 25. Preferably, two support platforms 27 are spaced apart in the drum housing 21 in the left-right direction, and at least a portion of the waste powder receiving cavity 20a is located between the two support platforms 27.

[0039] In some embodiments, the support surface 271 faces forward, that is, the straight line containing the front-back direction is perpendicular to the support surface 271.

[0040] Furthermore, the drum box 20 also includes a lower seal 26 disposed between the drum housing 21 and the blade holder 251. Generally, the lower seal 26 is configured as an elastic element such as a sponge, and the lower seal 26 extends in the left-right direction.

[0041] The surface of the photosensitive drum 22 has an imaging region 22a and non-imaging regions 22b. Along the left-right direction, the imaging region 22a is located between the two non-imaging regions 22b. The imaging region 22a is the region that can be irradiated by a laser beam and form an electrostatic latent image, while the non-imaging regions 22b are the regions that cannot be irradiated by a laser beam. Generally, along the left-right direction, the maximum length of the imaging region 22a is not less than the maximum width of the imaging medium. For example, when the imaging medium is A4 paper, the length of the imaging region 22a is not less than 21cm.

[0042] The drum housing 21 has a main body 211 and a side portion 212. Along a direction intersecting the left and right direction, at least a portion of the waste powder receiving cavity 20a is opposite to the main body 211, or in other words, at least a portion of the waste powder receiving cavity 20a is opposite to the imaging area 22a. Along the left and right direction, the side portion 212 is located at at least one of the two ends of the main body 211.

[0043] In some embodiments, the photosensitive drum 22 is supported by the side portion 212.

[0044] Along the vertical direction, the drum housing 21 has a lower end portion 214 located at the lower end of the main body portion 211. The lower end portion 214 forms a mounting surface 213 for mounting a cleaning scraper 23. Along the direction of laser beam travel, the mounting surface 213 is located at the end of the main body portion 211. Before the cleaning scraper 23 is installed, the mounting surface 213 is in an unobstructed, outwardly exposed state.

[0045] In some embodiments, when the processing box 100 is in the imaging state, such as Figure 4 As shown, the mounting surface 213 faces downwards, meaning that the orientation of the mounting surface 213 is perpendicular to the orientation of the support surface 271, or in other words, the mounting surface 213 and the support surface 271 are perpendicular to each other. This structure will be used as an example for explanation below.

[0046] In some embodiments, when the processing box 100 is in imaging mode, the mounting surface 213 faces rearward and downward.

[0047] In some embodiments, when the processing box 100 is in the imaging state, the mounting surface 213 faces forward and downward. Although the mounting surface 213 is not in an unobstructed and exposed state at this time, the technical solution involved in this utility model is still applicable.

[0048] Cleaning scraper

[0049] [First type of cleaning scraper]

[0050] like Figure 3 As shown, in the first cleaning scraper 25A, the blade 252 is a long strip extending in the left-right direction, including a connecting surface 256 for connecting with the blade holder 251. The blade holder 251 and the blade 252 can be any of the conventional connection methods such as bonding, welding, threaded connection, etc., and there is no limitation here.

[0051] Furthermore, the blade 252 also includes a first surface 254 opposite to the connecting surface 256 and a second surface 253 located between the first surface 254 and the connecting surface 256. An edge 255 is provided between the first surface 254 and the second surface 253. Generally speaking, the first surface 254, the second surface 253 and the connecting surface 256 all extend along the length direction / left-right direction of the blade 252. The first surface 254 and the connecting surface 256 are spaced apart and opposite to each other in the thickness direction of the blade 252, and the orientation of the first surface 254 is opposite to the orientation of the connecting surface 256. The second surface 253 also extends along the thickness direction of the blade 252, and the edge 255 extends along the length direction / left-right direction of the blade.

[0052] In this embodiment, the first surface 254 is parallel to the front-back direction, or in other words, the first surface 254 is parallel to the second reference line K2.

[0053] In some implementations, the second surface 253 connects the first surface 254 and the connecting surface 256.

[0054] In some embodiments, the surface area of ​​the first surface 254 is the same as the surface area of ​​the connecting surface 256, and is larger than the surface area of ​​the second surface 253.

[0055] In some implementations, the surface area of ​​the first surface 254 is greater than the surface area of ​​the second surface 253.

[0056] In some embodiments, along a width direction perpendicular to both the length and thickness directions of the blade 252, the blade 252 has a first end 2521 and a second end 2522. The second surface 253 and the edge 255 are both located at the second end 2522. The first end 2511 is closer to the blade holder 251 than the second end 2522. In other words, the second end 2522 is formed as the free end of the blade 252. Therefore, when the photosensitive drum 22 is installed in the drum housing 20, the second end 2522 is deformed by the pressure of the photosensitive drum 22, ultimately making the blade 252 and the photosensitive drum 22 in stable contact.

[0057] like Figure 4 As shown, when the processing box 100 is in the posture of imaging in the imaging device, the first rotation axis L1 is located above the second rotation axis L2 in the vertical direction. A first reference line K1 parallel to the front-back direction is drawn through the first rotation axis L1. The first reference line K1 passes through the waste powder inlet Q. In the drum box 20 with this design, the size of the drum shell 21 in the vertical direction can be reduced, which is conducive to the miniaturization of the drum box 20 / processing box 100.

[0058] Continue as Figure 4 As shown, a second reference line K2 is drawn parallel to the front-back direction through the second rotation axis L2. The second reference line K2 does not pass through the main body 211 and is located in the vertical direction. The sealing scraper 23 and the blade 252 are located on the same side of the second reference line K2. The second reference line K2 is located below at least a portion of the mounting surface 213. Preferably, the second reference line K2 is located below the main body 211. This design can not only reduce the size of the drum box 20 / drum housing 21 in the vertical direction, thereby facilitating the miniaturization of the drum box 20 / processing box 100, but also allow the photosensitive drum 22 to be exposed more outward, preventing the imaging medium P from contacting components other than the photosensitive drum 22, and allowing the imaging medium P to travel more smoothly.

[0059] exist Figure 4 In the process of imaging, the imaging medium P moves from back to front and comes into contact with the photosensitive drum 22 below it. During the imaging process of the processing cartridge 100, the electrostatic latent image developed by toner on the surface of the photosensitive drum 22 is transferred to the imaging medium P. If the imaging medium P comes into contact with a component other than the photosensitive drum 22 during its travel path, it may cause the imaging medium to deviate from the travel path or to form wrinkles, thereby causing the imaging medium P to get stuck.

[0060] To more clearly demonstrate the posture of the first cleaning scraper 25A after it has been installed into the drum housing 21, Figure 5A The cleaning blade 23 and cleaning scraper 25 shown in the image are not deformed, as... Figure 5AAs shown, the first surface 254 is parallel to the front-back direction, and the second surface 253 is perpendicular to the front-back direction. In other words, the first surface 254 is perpendicular to the up-down direction, and the second surface 253 is parallel to the up-down direction. When the second reference line K2 is set below at least a portion of the mounting surface 23, the waste powder inlet Q formed between the cleaning scraper 23 and the cleaning scraper 25 / blade 252 can be made smaller, which helps to prevent waste powder from leaking from the waste powder inlet Q.

[0061] When the photosensitive drum 22 is installed into the drum housing 21 / drum box 20, the cleaning scraper 23 and the cleaning blade 25 / blade 252 both come into contact with the photosensitive drum 22 and are pressed by the photosensitive drum 22 to produce a pressure effect. Figure 5B As shown in the figure, when the photosensitive drum 22 rotates in the direction indicated by r, the cleaning scraper 25 / blade 252 contacts the surface of the photosensitive drum 22 through the edge 255 and scrapes the waste powder T off the surface of the photosensitive drum 22. Finally, the waste powder T enters the waste powder receiving cavity 20a from the waste powder inlet Q.

[0062] like Figure 4 As shown, when the processing box 100 is in the imaging posture of the imaging device, the waste toner inlet Q is located near the lower end inside the waste toner receiving cavity 20a, as shown. Figure 5B As shown, the waste powder T entering the waste powder receiving cavity 20a will first accumulate near the cleaning scraper 23 under its own gravity. As the waste powder T increases, the pressure of the waste powder T on the cleaning scraper 23 also increases. In this embodiment of the present invention, the cleaning scraper 23 is located above the second reference line K2 in the vertical direction. Therefore, while the cleaning scraper 23 is deformed by the photosensitive drum 22, the photosensitive drum 22 can also support the cleaning scraper 23, thereby preventing the excessive waste powder T from causing the cleaning scraper 23 to flip in the opposite direction to the direction of deformation by the photosensitive drum 22. The waste powder T will not leak from between the cleaning scraper 23 and the photosensitive drum 22.

[0063] Continue as Figure 5B As shown, along the rotation direction of the photosensitive drum 22, the first surface 254 is located upstream of the second surface 253. Since the surface area of ​​the first surface 254 is larger than that of the second surface 253, when the photosensitive drum 22 applies the same pressure to the blade 252, the pressure per unit area of ​​the first surface 254 is smaller. Therefore, the risk of the cleaning scraper 25 / blade 252 flipping can be effectively reduced.

[0064] The relative positions of the first reference line K1, the second reference line K2, the main body 211, the sealing scraper 23 and the blade 252 described above are based on the second reference line K2 being parallel to the front-back direction. However, even when the second reference line K2 is perpendicular to the support surface 271, the relative positional relationships described above still hold true.

[0065] [Second type of cleaning scraper]

[0066] The structure of the second cleaning scraper 25B is basically the same as that of the first cleaning scraper 25A. The same numbering will be used for the components in the second cleaning scraper 25B below, such as... Figure 6 As shown, as the photosensitive drum 22 rotates in the direction r, the edge 255 between the first surface 254 and the second surface 253 contacts the surface of the photosensitive drum 22 and removes the waste powder. In this embodiment, along the rotation direction r of the photosensitive drum 22, the first surface 254 is located downstream of the second surface 253, or the first surface 254 is located upstream of the second surface 253.

[0067] However, regardless of the relative positions of the first surface 254 and the second surface 253, since the first surface 254 is not parallel to the second reference line K2 and the two are not perpendicular, the waste powder inlet Q can be made smaller, thereby more effectively preventing waste powder T leakage.

[0068] It should be noted that in this embodiment, the relative positions of the second reference line K2, the main body 211, the sealing scraper 23 and the blade 252 along the vertical direction are still consistent with the above description, and will not be repeated here.

[0069] [Third type of cleaning scraper]

[0070] The structure of the third cleaning scraper 25C is basically the same as that of the first cleaning scraper 25A. The same numbering will be used for the components in the third cleaning scraper 25C below, such as... Figure 7 As shown, as the photosensitive drum 22 rotates in the direction r, the edge 255 between the first surface 254 and the second surface 253 contacts the surface of the photosensitive drum 22 and removes the waste powder. In this embodiment, along the rotation direction r of the photosensitive drum 22, the first surface 254 is located downstream of the second surface 253, or the first surface 254 is located upstream of the second surface 253.

[0071] However, regardless of the relative positions of the first surface 254 and the second surface 253, since the first surface 254 is not parallel to the second reference line K2 and the two are not perpendicular, the waste powder inlet Q can be made smaller, thereby more effectively preventing waste powder T leakage.

[0072] It should be noted that in this embodiment, the relative positions of the second reference line K2, the main body 211, the sealing scraper 23 and the blade 252 along the vertical direction are still consistent with the above description, and will not be repeated here.

[0073] [Beneficial Effects]

[0074] 1. As described above, the cleaning scraper 23 and the blade 252 are located on the same side of the second reference line K2 in the vertical direction, which allows the cleaning scraper 23 to be set closer to the blade 252. The waste powder inlet Q between the cleaning scraper 23 and the blade 252 can be made smaller, thereby effectively preventing waste powder T from leaking from the waste powder inlet Q.

[0075] It should be noted that although the position of the mounting surface 213 can be adjusted so that a portion of the cleaning blade 23 and the blade 252 are located on opposite sides of the second reference line K2, the width of the cleaning blade 23 needs to be increased. This results in insufficient contact force between the cleaning blade 23 and the photosensitive drum 22, making it easy for waste toner T to leak from between the cleaning blade 23 and the photosensitive drum 22. Therefore, setting the cleaning blade 23 and the blade 252 on the same side of the second reference line K2 can reduce the width of the cleaning blade 23 and increase the contact force between the cleaning blade 23 and the photosensitive drum 22, thus preventing waste toner T leakage.

[0076] 2. Along the vertical direction, the second reference line K2 is located below the main body 211, which can reduce the size of the drum box 20 / drum shell 21 in the vertical direction, thereby facilitating the miniaturization of the drum box 20 / processing box 100.

[0077] 3. Along the vertical direction, the first rotation axis L1 is located above the second rotation axis L2, and the first reference line K1 also passes through the waste powder inlet Q, which can further reduce the size of the drum box 20 / drum shell 21 in the vertical direction, which is more conducive to the miniaturization of the drum box 20 / processing box 100.

[0078] 4. In point 2, the photosensitive drum 22 is exposed to the outside more, which can effectively prevent the imaging medium P from contacting components other than the photosensitive drum, and the imaging medium P can travel more smoothly.

[0079] 5. The mounting surface 213 is located in the lower end portion 214 below the main body portion 211. Along the direction of the laser beam, the mounting surface 213 is located at the end of the main body portion 211. Before the cleaning scraper 23 is installed, the mounting surface 213 is exposed to the outside without any obstruction, which can improve the ease of installation of the cleaning scraper 23. This beneficial effect will be more obvious when the orientation of the mounting surface 213 is perpendicular to the orientation of the support surface 271.

[0080] Preferably, such as Figure 4As shown, the lower end portion 214 extends forward from the main body portion 211 (towards the waste powder receiving cavity 20a), which increases the area of ​​the mounting surface 213, thereby making the cleaning scraper 23 more stably mounted.

[0081] 6. Along the vertical direction, the cleaning scraper 23 is located above the second reference line K2, and can also be supported by the photosensitive drum 22 to balance part of the weight of the waste powder T, prevent the cleaning scraper 23 from flipping over, and thus prevent the waste powder T from leaking.

[0082] 7. In the first cleaning scraper 25A, the first surface 254 and the second surface 253 are configured such that, along the rotation direction r of the photosensitive drum 22, the first surface 254 is located upstream of the second surface 253. Since the surface area of ​​the first surface 254 is greater than the surface area of ​​the second surface 253, this design can reduce the risk of the blade 252 flipping over.

[0083] 8. Because the drum cartridge 20 is provided with a waste toner receiving cavity 20a, firstly, the waste toner T can be stored in the waste toner receiving cavity 20a and the waste toner storage in the imaging device respectively. Even if the user replaces the processing cartridge 100 multiple times, the waste toner storage in the imaging device is not likely to be full, thus improving the user experience. Secondly, the quality requirements of the toner can be reduced. Even if a toner with a relatively low transfer rate is used, the waste toner storage will not be full, which helps to reduce the user's operating costs. Thirdly, it is not necessary to set up a structure for transferring waste toner between the processing cartridge 100 and the waste toner storage. That is, all the waste toner T is contained in the waste toner receiving cavity 20a, and the waste toner storage can be eliminated. Therefore, the structure of the imaging device can be simplified.

Claims

1. A drum box, characterized in that, The drum box includes: The drum shell has a supporting surface; A photosensitive drum, rotatably mounted in a drum housing, is used to form an electrostatic latent image that can be developed by toner; A cleaning scraper, supported by the support surface and fixedly installed in the drum housing, has a blade for removing residual toner from the surface of the photosensitive drum, and a waste toner receiving cavity is formed between the cleaning scraper and the drum housing for containing residual toner. A cleaning scraper is mounted on a mounting surface formed in the drum housing, and a waste powder inlet is formed between the cleaning scraper and the blade to allow residual carbon powder to enter the waste powder receiving cavity; Draw a reference line K2 perpendicular to the support surface through the rotation axis of the photosensitive drum. The cleaning scraper and blade are located on the same side of the reference line K2.

2. The drum box according to claim 1, characterized in that, The direction parallel to the rotation axis of the photosensitive drum is the left and right direction. The side with the photosensitive drum is the bottom, and the side without the photosensitive drum is the top. Along the vertical direction, reference line K2 is located below the mounting surface.

3. The drum box according to claim 1, characterized in that, Before the cleaning blade is installed, the mounting surface is exposed without any obstruction.

4. The drum box according to claim 1, characterized in that, The direction parallel to the rotation axis of the photosensitive drum is the left and right direction. The side with the photosensitive drum is the bottom, and the side without the photosensitive drum is the top. The drum shell has a main body and a side part. Along the direction intersecting the left and right direction, at least a portion of the waste powder receiving cavity is opposite to the main body. Along the left and right direction, the side part is located at at least one of the two ends of the main body. Along the vertical direction, reference line K2 is located below the main body.

5. The drum box according to claim 1, characterized in that, The side with the photosensitive drum is the bottom, and the side without the photosensitive drum is the top. Along the vertical direction, reference line K2 is located below the cleaning blade.

6. The drum box according to any one of claims 1-5, characterized in that, The cleaning scraper also includes a blade holder connected to the blade, the blade comprising: Connecting surface, used for connection with the tool holder; The first surface, along the thickness direction of the blade, is opposite to the connecting surface; The second surface is located between the first surface and the connecting surface; The edge, located between the first and second surfaces, is used to contact the surface of the photosensitive drum to scrape off residual toner from the surface of the photosensitive drum; The first surface, the second surface, the connecting surface, and the edge all extend along the length direction of the blade, and the second surface also extends along the thickness direction of the blade. The surface area of ​​the first surface is greater than the surface area of ​​the second surface. Along the direction of rotation of the photosensitive drum, the first surface is located upstream of the second surface.

7. The drum box according to any one of claims 1-5, characterized in that, The cleaning scraper also includes a blade holder connected to the blade, the blade comprising: Connecting surface, used for connection with the tool holder; The first surface, along the thickness direction of the blade, is opposite to the connecting surface; The second surface is located between the first surface and the connecting surface; The edge, located between the first and second surfaces, is used to contact the surface of the photosensitive drum to scrape off residual toner from the surface of the photosensitive drum; The first surface, the second surface, the connecting surface, and the edge all extend along the length direction of the blade, and the second surface also extends along the thickness direction of the blade. The surface area of ​​the first surface is greater than the surface area of ​​the second surface. Along the direction of rotation of the photosensitive drum, the first surface is located downstream of the second surface.

8. A processing box, detachably mounted to an imaging device, characterized in that, The processing cartridge includes a developing cartridge and a drum cartridge as described in any one of claims 1-7, wherein the developing cartridge and the drum cartridge are combined with each other.

9. The processing box according to claim 8, characterized in that, The developing cartridge includes a developing housing and a developing roller rotatably disposed within the developing housing. The developing roller is arranged opposite to the photosensitive drum and is used to carry toner contained in the developing housing and to supply the toner toward the photosensitive drum, thereby developing an electrostatic latent image. When the processing cartridge is in imaging position, the rotation axis of the developing roller is located above the rotation axis of the photosensitive drum; A reference line K1 perpendicular to the support surface is drawn along the rotation axis of the developing roller, and the reference line K1 passes through the waste powder inlet.

10. The processing box according to claim 8, characterized in that, A laser port is formed between the developing housing and the drum housing, allowing a laser beam that emits self-imaging equipment and is modulated with imaging information to pass through. The laser beam irradiates the surface of the photosensitive drum to form an electrostatic latent image. Along the direction of the laser beam's travel, the mounting surface is located at the end of the portion of the drum housing opposite the waste powder receiving cavity.

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