Waste powder bin, processing box and electrophotographic imaging equipment

Abstract

The invention provides a waste powder bin, a processing box and electrophotographic imaging equipment, the waste powder bin is provided with a first end wall and a second end wall which are distributed along a first direction, the first end wall is provided with a first mounting hole penetrating through the first end wall along the first direction, and the second end wall is provided with a second mounting hole penetrating through the second end wall along the first direction, a bearing part is integrally formed on the first end wall, surrounds the first mounting hole and extends towards the second end wall in the first direction, the bearing part is provided with an inwards-concave avoiding opening, and the inwards-concave avoiding opening is concavely formed from the outer circumferential surface of the bearing part to the inner part of the bearing part, so that the outer circumferential surface of the bearing part is a non-cylindrical surface; the bearing part is inserted into the annular groove of the photosensitive drum gear, and a storage cavity is defined by the bearing part and the annular groove; the electrophotographic imaging equipment comprises the processing box, the processing box is provided with the waste powder bin, and the waste powder bin is large in lubricating grease storage amount, good in photosensitive drum supporting performance and capable of effectively preventing the photosensitive drum from jumping and avoiding lubricating grease pollution.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic photographic imaging, in particular to a waste toner bin and a processing box provided with the waste toner bin, and an electronic photographic imaging device provided with the processing box. Background Art

[0002] As the core component of the processing box, the imaging assembly includes a waste toner bin, a photosensitive drum, and a connecting piece. The waste toner bin has a first end wall and a second end wall. The first end wall is provided with a first mounting hole that penetrates the photosensitive drum in the axial direction, and the second end wall is provided with a second mounting hole that penetrates the photosensitive drum in the axial direction. The photosensitive drum includes a drum body and a photosensitive drum gear. The photosensitive drum gear is mounted on the first end of the drum body, and the photosensitive drum gear is rotatably connected to the first mounting hole around the axis of the photosensitive drum. The connecting piece passes through the second mounting hole and is connected to the second end of the drum body, so that the photosensitive drum can rotate relative to the waste toner bin around its own axis. When the photosensitive drum gear is driven by the driving force, it will drive the photosensitive drum to rotate relative to the waste toner bin; at this time, friction will occur between the photosensitive drum gear and the hole wall of the first mounting hole, thereby increasing the speed at which the first mounting hole and / or the photosensitive drum gear are damaged; and in order to slow down the wear speed of the first mounting hole and the photosensitive drum gear and improve the rotation efficiency and smoothness of the photosensitive drum, the existing practice is to apply grease to the first mounting hole and the photosensitive drum gear. However, due to the small gap between the first mounting hole and the photosensitive drum gear, the stored grease is extremely limited, and the grease is consumed all the time during the operation of the imaging component, so that the first mounting hole and / or the photosensitive drum gear will still wear rapidly after the imaging component has been working for a period of time.

[0003] In this regard, existing R&D personnel have proposed an improvement method, such as Figure 1 and Figure 2 As shown, a recessed portion 911 is provided in the inner hole wall of the first mounting hole 91, and the recessed portion 911 is recessed from the inner hole wall of the first mounting hole 91 away from the photosensitive drum gear 92; when the photosensitive drum gear 92 is installed in the first mounting hole 91, a receiving groove is formed between the recessed portion 911 and the outer peripheral wall of the photosensitive drum gear 92 to receive grease. Although this improved method can increase the storage capacity of grease, this improved method has the following defects:

[0004] In order to ensure that there is enough storage capacity of grease, either the recessed portion 911 needs to be deep enough, or the distribution length of the recessed portion 911 along the first mounting hole 91 needs to be long enough, or the first end wall of the waste toner bin needs to be thick enough.

[0005] When the depression 911 is deeper, the fluidity of the grease may be worse, especially for more viscous grease, and the structural strength of the end wall of the waste powder bin may deteriorate; and when the depression 911 is shallower, the storage capacity of the grease may be too small.

[0006] and / or

[0007] When the distribution length of the recessed portion 911 along the first mounting hole 91 is long, the photosensitive drum will jump in the circumferential direction of the first mounting hole 91 during rotation, thereby affecting the imaging quality; and when the distribution length of the recessed portion 911 along the first mounting hole 91 is short, the storage amount of grease will be too small. And / or

[0008] When the first end wall of the waste toner bin is thicker, the amount of printing waste toner recovered by the waste toner bin will be reduced, and the first end wall after molding will be prone to quality problems such as shrinkage holes, which will also weaken the structural strength of the first end wall; and when the first end wall of the waste toner bin is thinner, the storage amount of grease will be too small, and the supporting effect on the photosensitive drum will be affected.

[0009] Furthermore, the grease of the improved imaging assembly can easily flow to the surface of the drum, causing the drum, the developing roller, the printing medium (such as paper), etc. to be contaminated, and affecting the imaging quality. Summary of the invention

[0010] In order to solve the above problems, the main purpose of the present invention is to provide a waste toner bin which can store a large amount of grease, has good support for the photosensitive drum, can effectively prevent the photosensitive drum from jumping and can avoid grease pollution.

[0011] Another object of the present invention is to provide a processing box provided with the above-mentioned waste toner bin.

[0012] Another object of the present invention is to provide an electronic photographic imaging device provided with the above-mentioned processing box.

[0013] In order to achieve the main purpose of the present invention, the present invention provides a waste powder bin, having a first end wall and a second end wall distributed along a first direction, the first end wall having a first mounting hole penetrating through the first direction, the second end wall having a second mounting hole penetrating through the first direction, wherein the first end wall is integrally formed with a bearing portion, the bearing portion surrounds the first mounting hole and extends toward the second end wall in the first direction, the bearing portion has more than two concave avoidance openings so that the outer peripheral surface of the bearing portion is a non-cylindrical surface; when the first end wall is assembled with a photosensitive drum gear, the photosensitive drum gear is rotatably installed in the first through hole, the bearing portion is inserted into an annular groove set on the photosensitive drum gear, the concave avoidance opening is connected to the annular groove and forms a storage cavity with the annular groove.

[0014] As can be seen from the above, the storage cavity formed by the concave avoidance opening on the bearing part and the annular groove on the photosensitive drum gear is used to store grease, and the design of the concave avoidance opening on the bearing part allows the inner hole wall of the first mounting hole to retain the cylindrical surface design, thereby ensuring the supporting effect of the first mounting hole on the photosensitive drum gear, better suppressing the mobilization during the rotation of the photosensitive drum, and ensuring the imaging quality. Secondly, the design of the bearing part and the concave avoidance opening on it is conducive to better increasing the storage capacity of grease without affecting the first end wall, the rotation of the photosensitive drum, the automatic supply of grease, etc., thereby ensuring that the first mounting hole, the bearing part, the photosensitive drum gear, etc. will not be ablated or damaged during long-term operation of the imaging component, and ensuring the smooth rotation of the photosensitive drum. Furthermore, the bearing part cooperates with the annular groove designed on the photosensitive drum gear to achieve more stable and reliable support for the first end of the photosensitive drum, and the setting of the bearing part acts as a reinforcing rib to enhance the structural strength of the first end wall, thereby facilitating the first end wall to be thinner and enhancing the waste toner bin's capacity to recycle waste toner.

[0015] A preferred solution is that the concave avoidance opening penetrates the bearing portion in the thickness direction of the bearing portion.

[0016] As can be seen from the above, this design enables effective lubrication between the outer circumferential surface and inner circumferential surface of the bearing part and the two side walls of the annular groove, and also enables effective lubrication between the photosensitive drum gear and the inner hole wall of the first mounting hole, thereby ensuring smooth rotation of the photosensitive drum and better preventing the first mounting hole, the bearing part, the photosensitive drum gear, etc. from being burned or damaged.

[0017] A further solution is that a first opening of the inner concave avoidance opening close to the outer periphery of the bearing portion is larger than a second opening of the inner concave avoidance opening close to the inner periphery of the bearing portion.

[0018] It can be seen from the above that since the outer circumference of the bearing part is greater than the inner circumference, the above design can ensure that the first mounting hole, the bearing part and the photosensitive drum gear are more fully lubricated while ensuring the stability and reliability of the bearing part's support for the photosensitive drum gear and the smooth rotation of the photosensitive drum gear.

[0019] A further solution is that the outer circumferential surface of the bearing part is composed of more than two first combined surfaces distributed along the circumference of the bearing part, the first combined surface includes a first arc surface and two first planes, the first arc surface is connected between the two first planes, and two adjacent first combined surface pieces form a concave avoidance opening; or the outer circumferential surface of the bearing part is composed of more than two second arc surfaces distributed along the circumference of the bearing part, and a concave avoidance opening is formed between two adjacent second arc surfaces.

[0020] As can be seen from the above, the above designs can ensure that the bearing portion stably supports the photosensitive drum gear and at the same time can maximize the storage cavity.

[0021] Another preferred solution is that the concave avoidance opening is formed from the outer peripheral surface of the bearing portion to the inner portion of the bearing portion.

[0022] As can be seen from the above, this design enables the photosensitive drum gear to be better supported by the first mounting hole and the bearing portion to ensure the smooth rotation of the photosensitive drum.

[0023] A further solution is that the outer circumferential surface of the bearing part has more than two third arc surfaces and more than two second planes, the third arc surfaces and the second planes are distributed alternately, and the concave avoidance opening is formed at the second plane; or the outer circumferential surface of the bearing part has a fourth arc surface and a second combined surface, the fourth arc surface is connected end to end with the second combined surface, the second combined surface includes multiple third planes distributed along the circumference of the bearing part, and there is a bend between two adjacent third planes, and the concave avoidance opening is formed at the third plane, when the waste powder bin is in the installation position, the fourth arc surface is located on the upper side of the second combined surface, and the circular angle of the bearing part corresponding to the fourth arc surface is greater than or equal to 150°; or in the axial direction, the projection of the outer circumferential surface of the bearing part is a first polygon, the projection of the inner circumferential surface of the bearing part is a second polygon, and the concave avoidance opening is formed at each edge of the first polygon.

[0024] As can be seen from the above, the above designs can enable the bearing part to stably support the photosensitive drum gear, ensuring that the photosensitive drum can rotate smoothly, while maximizing the storage cavity as much as possible.

[0025] A further solution is that the first end wall is extended in the first direction away from the second end wall to form an extension portion, and when the waste toner bin is in the installation position, at least a part of the extension portion is located below the first mounting hole.

[0026] As can be seen from the above, the design of the extension part can better prevent the grease from accidentally leaking from the matching gap between the first mounting hole and the photosensitive drum gear. The extension part can properly block and receive the dripping grease to prevent the grease from dripping into the electronic photographic imaging device.

[0027] In order to achieve another object of the present invention, the present invention provides a processing box, including a photosensitive drum and a connecting part, the photosensitive drum includes a drum body and a photosensitive drum gear, the photosensitive drum gear is installed at the first end of the drum body, the photosensitive drum gear is rotatably installed in the first mounting hole, and the connecting part is connected to the second end of the drum body after passing through the second mounting hole, wherein the processing box also includes the above-mentioned waste powder bin; an annular groove is provided on the photosensitive drum gear, the opening of the annular groove faces the first end wall, the bearing part is inserted into the annular groove, the concave avoidance opening is connected to the annular groove and forms a storage cavity with the annular groove.

[0028] As can be seen from the above, the processing box provided with the above imaging assembly has a longer service life, better imaging quality, and a larger waste toner bin capacity; in addition, due to the presence of the annular groove, it can effectively prevent the grease from flowing to the drum surface of the photosensitive drum, thereby preventing the drum body, the developing roller, the printing medium (such as paper), etc. from being contaminated, thereby ensuring the imaging quality.

[0029] A further solution is that, in the axial direction, there is a distance between the protruding end of the bearing portion and the bottom of the annular groove.

[0030] As can be seen from the above, providing a spacing between the protruding end of the bearing portion and the bottom of the annular groove can effectively increase the storage capacity of the grease.

[0031] Another preferred solution is that the imaging component also includes a driving force receiving head; the driving force receiving head is integrally formed at the end of the photosensitive drum gear away from the drum body, or the driving force receiving head is axially slidably installed on the side of the photosensitive drum gear away from the drum body, or the driving force receiving head is ball-jointedly connected to the end of the photosensitive drum gear away from the drum body.

[0032] As can be seen from the above, the driving force receiving head is designed so that the photosensitive drum can receive external driving force to rotate, which is beneficial to the cleaning of the photosensitive drum; and the assembly method between the driving force receiving head and the photosensitive drum gear is diverse, so that the imaging component can adapt to different types of electronic photographic imaging equipment, different assembly environments and assembly requirements, etc., thereby improving the practicality of the imaging component and expanding the scope of application of the imaging component.

[0033] In order to achieve another object of the present invention, the present invention provides an electronic photographic imaging device, including a body, a processing box installation cavity is provided in the body, wherein the above-mentioned processing box is installed in the processing box installation cavity.

[0034] As can be seen from the above, the electronic photographic imaging device has a longer service life, better imaging quality and lower use and maintenance costs by providing the above-mentioned processing box. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a partial structural diagram of the waste toner bin of an existing imaging component.

[0036] Figure 2 This is a structural diagram of an existing imaging component with some components omitted.

[0037] Figure 3 It is a structural diagram of the first embodiment of the processing box of the present invention.

[0038] Figure 4 It is a partial structural diagram of the first embodiment of the processing box of the present invention.

[0039] Figure 5 1 is a structural diagram of a waste toner bin of a first embodiment of a processing box of the present invention.

[0040] Figure 6 It is a structural diagram of the photosensitive drum of the first embodiment of the process box of the present invention.

[0041] Figure 7 It is a cross-sectional view of the local structure of the first embodiment of the processing box of the present invention after some components are omitted.

[0042] Figure 8 yes Figure 5 Enlarged view of point A in the middle.

[0043] Fig. 9 It is a cross-sectional view of the labor-saving part assembly of the first embodiment of the processing box of the present invention.

[0044] Fig.10 It is a partial structural diagram of the waste toner bin of the second embodiment of the processing box of the present invention.

[0045] Fig.11 It is a cross-sectional view of the local structure of the second embodiment of the processing box of the present invention after some components are omitted.

[0046] Fig.12 It is a partial structural diagram of the waste toner bin of the third embodiment of the processing box of the present invention.

[0047] Fig.13 It is a cross-sectional view of the local structure of the third embodiment of the processing box of the present invention with some components omitted.

[0048] Fig.14 It is a partial structural diagram of the waste toner bin of the fourth embodiment of the processing box of the present invention.

[0049] Fig.15 It is a cross-sectional view of the local structure of the fourth embodiment of the processing box of the present invention after some components are omitted.

[0050] Fig.16 It is a partial structural diagram of the waste toner bin of the fifth embodiment of the processing box of the present invention.

[0051] Fig.17 It is a sectional view of the local structure of the fifth embodiment of the processing box of the present invention after some components are omitted.

[0052] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0053] Process cartridge first embodiment

[0054] Reference Figure 3 , the process box 100 includes an imaging component 101 and a developing unit 102.

[0055] Combination Figure 4The imaging component 101 includes a waste toner bin 1, a photosensitive drum 2, a connecting part 3 and a driving force receiving head 4, etc.; it should be noted that other related components of the imaging component 101 (such as a charging roller, a cleaning device, etc.) are the same as the corresponding components of the existing imaging component 101, so such components will not be described in detail here.

[0056] Combination Figure 5 The waste toner bin 1 has a first end wall 11 and a second end wall 12, which are distributed along a first direction (i.e., the axial direction of the photosensitive drum 2), and are located at two ends of the photosensitive drum 2. A first mounting hole 111 is provided on the first end wall 11, and the first mounting hole 111 penetrates the first end wall 11 in the axial direction of the photosensitive drum 2; a bearing portion 112 is provided on a side of the first end wall 11 facing the second end surface, and the bearing portion 112 extends toward the second end wall 12 in the axial direction of the photosensitive drum 2 (i.e., toward the drum body 21 of the photosensitive drum 2), the bearing portion 112 is integrally formed with the first end wall 11, and the bearing portion 112 is arranged around the first mounting hole 111, and preferably, the inner circumferential surface of the bearing portion 112 is flush or substantially flush with the inner hole wall of the first mounting hole 111. The second end wall 12 is provided with a second mounting hole 121 . The second mounting hole 121 is substantially coaxially arranged with the first mounting hole 111 . The second mounting hole 121 penetrates the second end wall 12 in the axial direction of the photosensitive drum 2 .

[0057] Combination Figure 6 and Figure 7 The photosensitive drum 2 includes a drum body 21 and a photosensitive drum gear 22 , and the photosensitive drum gear 22 is installed at the first end of the drum body 21 ; wherein an annular groove 221 is provided on the photosensitive drum gear 22 , and the opening of the annular groove 221 is arranged toward the first end wall 11 . When the photosensitive drum 2 is assembled with the waste toner bin 1, the photosensitive drum gear 22 passes through the first mounting hole 111 on the first end wall 11 and is rotatably connected with the first mounting hole 111, and the bearing portion 112 on the first end wall 11 is inserted into the annular groove 221 of the photosensitive drum gear 22; preferably, the photosensitive drum gear 22 is adjacent to or has a small gap with the inner hole wall of the first mounting hole 111, the outer peripheral wall of the bearing portion 112 is adjacent to or has a small gap with the outer ring side groove wall of the annular groove 221, and the inner peripheral wall of the bearing portion 112 is adjacent to or has a small gap with the inner ring side wall of the annular groove 221, wherein the small gap does not affect the stability of the rotation of the photosensitive drum gear 22, that is, it does not cause the photosensitive drum 2 to jump during the rotation process. In addition, the connecting member 3 (such as a pin) passes through the second mounting hole 121 from the outer side of the second end wall 12 (that is, the side of the second end wall 12 facing away from the first end wall 11) and is connected to the second end of the drum body 21, so that the drum body 21 can rotate relative to the connecting member 3.

[0058] The bearing portion 112 on the first end wall 11 can cooperate with the annular groove 221 on the photosensitive drum gear 22 to achieve more stable and reliable support for the first end of the photosensitive drum 2. At the same time, the bearing portion 112 can also serve as a reinforcing rib to enhance the structural strength of the first end wall 11, thereby facilitating the first end wall 11 to be thinner, thereby expanding the waste toner recovery capacity of the waste toner bin 1.

[0059] Combination Figure 8 and Fig. 9 The bearing portion 112 on the first end wall 11 has a concave avoidance opening 1120, the number of which is preferably more than two, and the more than two concave avoidance openings 1120 are distributed along the circumference of the bearing portion 112, and the concave avoidance opening 1120 is formed from the outer peripheral surface of the bearing portion 112 to the inner side of the bearing portion 112, so that the outer peripheral surface of the bearing portion 112 is a non-cylindrical surface, which is conducive to storing a larger amount of grease; when the photosensitive drum 2 is assembled with the waste toner bin 1, the concave avoidance opening 1120 is connected with the annular groove 221 and the annular groove 221 forms a storage cavity 20, and the storage cavity 20 is used to store grease. Among them, the concave avoidance opening 1120 preferably penetrates the bearing portion 112 in the first direction.

[0060] By providing the bearing portion 112 and the inner recessed avoidance opening 1120 on the bearing portion 112, it is beneficial to better increase the storage amount of grease without affecting the first end wall 11, the rotation of the photosensitive drum 2, the automatic supply of grease, etc., so as to ensure that the first mounting hole 111, the bearing portion 112, the photosensitive drum gear 22, etc. will not be burned or damaged during the long-term operation of the imaging assembly 101, and the smooth rotation of the photosensitive drum 2 is ensured. This design effectively solves the technical problems of the existing design (the inner hole wall of the first mounting hole 111 is recessed toward the outside of the first mounting hole 111 to form a recessed portion for accommodating grease) that the supporting effect of the photosensitive drum 2 is poor, resulting in the photosensitive drum 2 being prone to jumping and unstable rotation, and the small storage capacity of the lubricant, which affects the waste toner recovery amount of the waste toner bin 1.

[0061] In addition, the design of the concave avoidance opening 1120 on the bearing portion 112 allows the inner hole wall of the first mounting hole 111 to retain the cylindrical surface design, thereby ensuring the supporting effect of the first mounting hole 111 on the photosensitive drum gear 22, better suppressing the movement of the photosensitive drum 2 during rotation, and ensuring the imaging quality. Furthermore, due to the presence of the annular groove 221 of the photosensitive drum 2, the grease is effectively prevented from flowing to the surface of the drum body 21 of the photosensitive drum 2, thereby preventing the drum body 21, the developing roller, the printing medium (such as paper), etc. from being contaminated, thereby ensuring the imaging quality.

[0062] In this embodiment, the concave escape opening 1120 of the bearing portion 112 penetrates the bearing portion 112 in the thickness direction of the bearing portion 112, that is, the concave escape opening 1120 penetrates the outer circumference and the inner circumference of the bearing portion 112. This design enables effective lubrication between the outer circumference of the bearing portion 112 and the outer ring side wall of the annular groove 221, and between the inner circumference of the bearing portion 112 and the inner ring side wall of the annular groove 221; at the same time, the grease can also flow through the concave escape opening 1120 to the space between the photosensitive drum gear 22 and the inner hole wall of the first mounting hole 111, so that the space between the photosensitive drum gear 22 and the inner hole wall of the first mounting hole 111 is also effectively lubricated, thereby further ensuring the smooth rotation of the photosensitive drum 2, and better preventing the first mounting hole 111, the bearing portion 112, the photosensitive drum gear 22, etc. from being ablated or damaged.

[0063] Preferably, a first opening of the recessed avoidance opening 1120 close to the outer periphery of the bearing portion 112 is larger than a second opening of the recessed avoidance opening 1120 close to the inner periphery of the bearing portion 112; since the outer periphery circumference of the bearing portion 112 is larger than the inner periphery circumference, the above-mentioned design of the recessed avoidance opening 1120 can ensure that the first mounting hole 111, the bearing portion 112 and the photosensitive drum gear 22 are more fully lubricated while ensuring the stability and reliability of the bearing portion 112 supporting the photosensitive drum gear 22 and the smooth rotation of the photosensitive drum gear 22.

[0064] In order to ensure that the bearing portion 112 provides stable support for the photosensitive drum gear 22 and at the same time maximize the storage cavity 20, as a preferred solution, the outer peripheral surface of the bearing portion 112 is more than two first combination surfaces 1121 distributed along the circumference of the bearing portion 112, wherein the first combination surface 1121 includes a first arc surface 11211 and two first planes 11212, the first arc surface 11211 is connected between the two first planes 11212, and two adjacent first combination surfaces 1121 form a concave avoidance opening 1120; as in the present embodiment, there are four first combination surfaces 1121, so that the outer peripheral contour of the bearing portion 112 is roughly a rounded rectangle.

[0065] Furthermore, in the axial direction of the photosensitive drum 2 , there is a distance L between the protruding end of the bearing portion 112 and the bottom of the annular groove 221 . This design can further increase the storage capacity of the grease.

[0066] Furthermore, the first end wall 11 is extended in the axial direction of the photosensitive drum 2 away from the drum body 21 to form an extension portion 113; when the imaging assembly 101 is in the installation position (that is, when the waste toner bin 1 is in the installation position), at least a part of the extension portion 113 is located below the photosensitive drum gear 22. The extension portion 113 is designed so that when the grease accidentally leaks from the matching gap between the first mounting hole 111 and the photosensitive drum gear 22 to the outside of the first end cover, the extension portion 113 can properly block and receive the dripping grease to prevent the grease from dripping into the electronic photographic imaging device.

[0067] The driving force receiving head 4 is mounted on the photosensitive drum gear 22, and the driving force receiving head 4 extends out of the first mounting hole 111 passing through the first end wall 11 and extends out of the outside of the first end wall 11 (i.e., the side of the first end wall 11 facing away from the second end wall 12). The driving force receiving head 4 can enable the photosensitive drum 2 to receive an external driving force for rotation, thereby facilitating the cleaning of the photosensitive drum 2. In this embodiment, the driving force receiving head 4 is slidably mounted on the side of the photosensitive drum gear 22 away from the drum body 21 along the axial direction of the photosensitive drum 2, and an elastic member (such as a compression spring) is provided between the driving force receiving head 4 and the photosensitive drum gear 22 to force the driving force receiving head 4 to move away from the drum body 21 of the photosensitive drum 2.

[0068] Of course, as other optional solutions, in other embodiments, the driving force receiving head 4 can also be designed to be integrally formed at the end of the photosensitive drum gear 22 away from the drum body 21; or, the driving force receiving head 4 is designed to be connected to the end of the photosensitive drum gear 22 away from the drum body 21 by a ball joint. It can be seen that the assembly method between the driving force receiving head 4 and the photosensitive drum gear 22 is diverse, so that the imaging assembly 101 can be adapted to different types of electronic photographic imaging devices, different assembly environments and assembly requirements, etc., thereby improving the practicality of the imaging assembly 101 and expanding the scope of application of the imaging assembly 101.

[0069] The developing unit 102 includes a developing frame 1021 and a developing roller, etc. The developing roller is rotatably mounted on the developing frame 1021, and the developing roller is substantially parallel to the photosensitive drum 2. It should be noted that other related parts of the developing unit 102 (such as a powder feeding roller, a powder discharging scraper, a transmission gear set, etc.) are the same as the corresponding parts of the existing developing unit 102, so such parts are not described in detail here. When the imaging assembly 101 is assembled with the developing unit 102, the waste powder bin 1 is connected to the developing frame 1021; when the processing box 100 is in a printing state, the photosensitive drum 2 is in close contact with the developing roller, and the photosensitive drum gear 22 is meshed with the developing roller gear on the developing roller; when the processing box 100 is in a non-printing state, the photosensitive drum 2 is separated from the developing roller, and the photosensitive drum gear 22 is disengaged from the developing roller gear on the developing roller.

[0070] In summary, it can be seen that, through the design of the processing box 100, the service life of the processing box 100 is longer, the imaging quality is better, and the capacity of the waste toner bin 1 is larger.

[0071] Processing cartridge second embodiment

[0072] Reference Fig.10 and Fig.11 , the difference between this embodiment and the first embodiment of the process cartridge lies in the structure of the bearing portion. Specifically, in this embodiment:

[0073] The outer peripheral surface of the bearing portion is no longer two or more first combination surfaces distributed along the circumference of the bearing portion, but is designed as follows:

[0074] The outer peripheral surface of the bearing portion is two or more second arc surfaces 511 distributed along the circumference of the bearing portion; wherein an inner concave avoidance opening 510 is formed between two adjacent second arc surfaces 511 .

[0075] Preferably, as in this embodiment, the number of the second arc surfaces 511 is four, and this design makes the bearing portion a discontinuous ring shape, wherein the discontinuous portion is the concave avoidance opening 510 .

[0076] Processing cartridge third embodiment

[0077] Reference Fig.12 and Fig.13 , the difference between this embodiment and the first embodiment of the process cartridge lies in the structure of the bearing portion. Specifically, in this embodiment:

[0078] The recessed relief opening is no longer designed to penetrate the bearing portion in the thickness direction of the bearing portion, but is designed as follows:

[0079] The concave avoidance opening 530 is formed from the outer peripheral surface of the bearing part to the inner peripheral surface of the bearing part, but the part passes through the bearing part. As a preferred solution, the outer peripheral surface of the bearing part has more than two third arc surfaces 52 and more than two second planes 53, and the third arc surfaces 52 and the second planes 53 are alternately distributed, and the concave avoidance opening 530 is formed at the second plane 53; as in the present embodiment, the number of the third arc surfaces 52 and the second planes 53 are both four, so that the outer peripheral contour of the bearing part is roughly in the shape of a rounded rectangle. Among them, the grease can also enter the tiny gap between the photosensitive drum gear and the first mounting hole and the inner peripheral surface of the bearing part to ensure lubrication between the photosensitive drum gear and the first mounting hole and the inner peripheral surface of the bearing part. In addition, this design enables the photosensitive drum gear to be better supported by the first mounting hole and the bearing part to ensure the stability of the photosensitive drum rotation.

[0080] Process cartridge fourth embodiment

[0081] Reference Fig.14 and Fig.15, the difference between this embodiment and the third embodiment of the process cartridge lies in the structure of the bearing portion. Specifically, in this embodiment:

[0082] The outer peripheral surface of the bearing portion is no longer two or more third arc surfaces and two or more second planes, but is designed as follows:

[0083] The outer peripheral surface of the bearing portion is a fourth arc surface 54 and a second combination surface 55, and the fourth arc surface 54 is connected end to end with the second combination surface 55; wherein the second combination surface 55 includes a plurality of third planes 551 distributed along the circumference of the bearing portion, and the space between two adjacent third planes 551 is bent, and the second combination surface 55 can be regarded as a part of the side surface of a polygonal column, and the concave avoidance opening 550 is formed at each third plane 551. In addition, when the imaging assembly is in the installation position, the fourth arc surface 54 is preferably located on the upper side of the second combination surface 55 to better support the photosensitive drum gear 56. Preferably, the circular angle a of the bearing portion corresponding to the fourth arc surface 54 is greater than or equal to 150°. For example, in the present embodiment, the circular angle a of the bearing portion corresponding to the fourth arc surface 54 is 180°.

[0084] Process cartridge fifth embodiment

[0085] Reference Fig.16 and Fig.17 , the difference between this embodiment and the third embodiment of the process cartridge lies in the structure of the bearing portion. Specifically, in this embodiment:

[0086] The outer peripheral surface of the bearing portion is no longer two or more third arc surfaces and two or more second planes, but is designed as follows:

[0087] The outer circumferential surface of the bearing portion is the side surface of the first polygonal prism, and the inner circumferential surface of the bearing portion is the side surface of the second polygonal prism; that is, in the axial direction of the photosensitive drum, the projection of the outer circumferential surface of the bearing portion is a first polygon 57, and the projection of the inner circumferential surface of the bearing portion is a second polygon 58; wherein, the concave avoidance opening 570 is formed at each edge of the first polygon 57; in addition, the inner hole wall of the first mounting hole 50 may also be cylindrical or in the shape of a second polygonal prism.

[0088] When the photosensitive drum gear 59 is assembled with the first mounting hole 50 and the bearing part, the photosensitive drum gear 59 is matched with the inner hole wall of the first mounting hole 50 and the inner circumference of the bearing part respectively; wherein, when the inner hole wall of the first mounting hole 50 is a second multi-prism shape, the photosensitive drum gear 59 is tangentially matched with the side of the inner hole wall of the first mounting hole 50, and the photosensitive drum gear 59 is tangentially matched with the side of the inner circumference of the bearing part; in addition, the photosensitive drum gear 59 is preferably also in contact with the side edge of the outer circumference of the bearing part. This design is conducive to storing a larger amount of grease. At this time, the gap between the inner circumference of the bearing part and the photosensitive drum gear 59 can also be used to store grease, but there may be a relatively weak support effect of the first mounting hole 50 and the bearing part on the photosensitive drum gear 59.

[0089] Electrophotographic imaging device embodiment

[0090] The electronic photographic imaging device comprises a body, a processing cartridge installation cavity is provided in the body, and the above-mentioned processing cartridge is installed in the processing cartridge installation cavity; wherein the processing cartridge is the processing cartridge described in any one of the first embodiment to the fifth embodiment of the above-mentioned processing cartridge. By providing the above-mentioned processing cartridge, the electronic photographic imaging device has a longer service life, better imaging quality, and lower use and maintenance costs.

[0091] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A waste toner bin, comprising a first end wall and a second end wall distributed along a first direction, wherein the first end wall has a first mounting hole penetrating through the first direction, and the second end wall has a second mounting hole penetrating through the first direction, characterized in that: The first end wall is integrally formed with a bearing portion, the bearing portion surrounds the first mounting hole and extends toward the second end wall in a first direction, the bearing portion has an inner concave avoidance opening, the inner concave avoidance opening is formed from the outer circumference of the bearing portion to the inner side of the bearing portion so that the outer circumference of the bearing portion is a non-cylindrical surface; When the first end wall is assembled with the photosensitive drum gear, the photosensitive drum gear is rotatably installed in the first through hole, the bearing portion is inserted into the annular groove provided on the photosensitive drum gear, and the concave avoidance port is connected with the annular groove and forms a storage cavity with the annular groove.

2. The waste toner bin according to claim 1, characterized in that: The recessed escape opening penetrates the bearing portion in a thickness direction of the bearing portion.

3. The waste toner bin according to claim 2, characterized in that: A first opening of the inner concave escape opening close to the outer periphery of the bearing portion is larger than a second opening of the inner concave escape opening close to the inner periphery of the bearing portion.

4. The waste toner bin according to claim 3, characterized in that: The outer peripheral surface of the bearing portion is composed of more than two first combination surfaces distributed along the circumference of the bearing portion, the first combination surface includes a first arc surface and two first planes, the first arc surface is connected between the two first planes, and two adjacent first combination surface pieces form the concave avoidance opening; or The outer peripheral surface of the bearing portion is two or more second arc surfaces distributed along the circumference of the bearing portion, and the concave avoidance opening is formed between two adjacent second arc surfaces.

5. The waste toner bin according to claim 1, characterized in that: The outer peripheral surface of the bearing portion has two or more third arc surfaces and two or more second planes, the third arc surfaces and the second planes are alternately distributed, and the concave avoidance opening is formed on the second plane; or The outer peripheral surface of the bearing portion has a fourth arc surface and a second combined surface, the fourth arc surface is connected end to end with the second combined surface, the second combined surface includes a plurality of third planes distributed along the circumference of the bearing portion, and there is a bend between two adjacent third planes, the concave avoidance opening is formed at the third plane, and when the waste toner bin is in the installation position, the fourth arc surface is located on the upper side of the second combined surface, and the circular angle of the bearing portion corresponding to the fourth arc surface is greater than or equal to 150°; or In the first direction, the projection of the outer circumference of the bearing portion is a first polygon, the projection of the inner circumference of the bearing portion is a second polygon, and the concave avoidance opening is formed at each side of the first polygon.

6. The waste toner bin according to any one of claims 1 to 5, characterized in that: The first end wall is formed with an extension portion extending in the first direction away from the second end wall, and when the waste toner bin is in the installation position, at least a portion of the extension portion is located below the first mounting hole.

7. Processing box, including: A photosensitive drum, wherein the photosensitive drum comprises a drum body and a photosensitive drum gear, wherein the photosensitive drum gear is mounted on a first end of the drum body, and the photosensitive drum gear is rotatably mounted in the first mounting hole; a connecting member, the connecting member passing through the second mounting hole and connected to the second end of the drum body; Features: The processing box further comprises a waste toner bin as claimed in any one of claims 1 to 6; An annular groove is provided on the photosensitive drum gear, the opening of the annular groove faces the first end wall, the bearing part is inserted into the annular groove, and the concave avoidance port is connected with the annular groove and forms a storage cavity with the annular groove.

8. The process cartridge according to claim 7, wherein: In the first direction, there is a distance between the protruding end of the bearing portion and the bottom of the annular groove.

9. The process cartridge according to claim 7 or 8, characterized in that: The process box also includes a driving force receiving head; The driving force receiving head is integrally formed at one end of the photosensitive drum gear away from the drum body, or The driving force receiving head is slidably mounted on a side of the photosensitive drum gear away from the drum body along the first direction, or The driving force receiving head is ball-jointedly connected to an end of the photosensitive drum gear away from the drum body.

10. An electronic photographic imaging device, comprising a body, wherein a processing cartridge mounting cavity is provided in the body, wherein: The process cartridge according to any one of claims 7 to 9 is installed in the process cartridge installation cavity.

Images