Imaging unit and toner cartridge

Abstract

The invention provides an imaging unit and a toner cartridge, the imaging unit comprises a waste powder bin, a photosensitive drum and a cleaning scraper, the photosensitive drum is rotatably mounted on the waste powder bin around the axis of the photosensitive drum, the cleaning scraper is mounted on the waste powder bin, the cleaning scraper comprises a scraper blade, the scraper blade is in contact with the surface of the photosensitive drum, the scraper blade is provided with a developing section and two non-developing sections, and the developing section and the two non-developing sections are in contact with each other. The developing section is located between the two non-developing sections, the developing section is in contact with the developing area of the photosensitive drum, the non-developing sections are in contact with the non-developing area of the photosensitive drum, and the cleaning pressure of the developing section on the developing area is larger than that of the non-developing section on the non-developing area. The toner cartridge is provided with the imaging unit, and the imaging unit can improve the imaging quality and prolong the service life of the photosensitive drum.

Description

Technical Field

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

[0002] Electronic photographic imaging devices (such as laser printers, inkjet printers, etc.) are common office equipment; among them, laser printers form text and / or patterns on printing media such as paper through electronic imaging, and use toner cartridges as consumable containers.

[0003] The existing toner cartridge usually includes a developing unit and an imaging unit, wherein the imaging unit includes a waste toner bin, a photosensitive drum, a charging roller, a cleaning scraper, etc. The photosensitive drum and the charging roller are respectively installed on the waste toner bin to rotate around their own axes, the photosensitive drum is arranged at the waste toner collection port of the waste toner bin, and the charging roller is used to charge the photosensitive drum; the cleaning scraper is installed on the waste toner bin, and the scraper of the cleaning scraper contacts the surface of the photosensitive drum and the contact point of the two is located at the waste toner collection port, so that the scraper can scrape off the waste toner remaining on the photosensitive drum and make the waste toner fall into the waste toner collection port and be recycled into the waste toner bin, thereby ensuring the printing quality. In addition, the scraper can also play a role in lubricating the photosensitive drum to prevent the photosensitive drum from being worn during long-term use.

[0004] However, since the contact structure and contact method of the scraper blade and the developing area and non-developing area of ​​the photosensitive drum are the same, the contact force and cleaning method of the developing area and non-developing area of ​​the photosensitive drum are different in actual work, the photosensitive drum is prone to wear and poor cleaning effect of the scraper blade when in long-term contact with the scraper blade, resulting in imaging defects caused by residual toner on the surface of the photosensitive drum, and in severe cases, toner leakage may occur. Summary of the invention

[0005] In order to solve the above problems, the main purpose of the present invention is to provide an imaging unit which can improve the imaging quality and extend the service life of the photosensitive drum.

[0006] Another object of the present invention is to provide a toner cartridge provided with the above imaging unit.

[0007] In order to achieve the main purpose of the present invention, the present invention provides an imaging unit, including a waste toner bin, a photosensitive drum and a cleaning scraper, the photosensitive drum is installed on the waste toner bin for rotation around its own axis, the cleaning scraper is installed on the waste toner bin, the cleaning scraper includes a scraper blade, the scraper blade contacts the surface of the photosensitive drum, wherein the scraper blade has a developing section and two non-developing sections, the developing section is located between the two non-developing sections, the developing section contacts the developing section of the photosensitive drum, the non-developing section contacts the non-developing section of the photosensitive drum, and the cleaning pressure of the developing section on the developing section is greater than the cleaning pressure of the non-developing section on the non-developing section.

[0008] As can be seen from the above, by designing the zoned pressure of the scraper, the cleaning efficiency of the scraper is optimized, the wear rate of the photosensitive drum is reduced, the service life of the photosensitive drum is extended, and the powder leakage problem can be improved.

[0009] A further solution is that the scraper blade is elastic; the elasticity of the non-developing section is greater than the elasticity of the developing section.

[0010] As can be seen from the above, the developing section has lower elasticity, which can apply greater cleaning pressure to the photosensitive drum to ensure that the toner in the developing area of ​​the photosensitive drum is completely removed to avoid image residue; while the non-developing section has higher elasticity, which can automatically adjust the contact force and angle according to the rotation and surface condition of the photosensitive drum to avoid hard friction on the non-developing area of ​​the photosensitive drum, thereby extending the service life of the photosensitive drum.

[0011] A preferred solution is that the scraper blade is made of polyurethane material, rubber material or foamed elastic material.

[0012] As can be seen from the above, through the design of the scraper blade material, it can be ensured that the scraper blade can reliably clean the photosensitive drum without causing excessive wear to the photosensitive drum, thereby ensuring the performance and service life of the photosensitive drum.

[0013] Another preferred solution is that the thickness of the non-developing section gradually decreases from the junction of the non-developing section and the developing section toward the first end of the non-developing section away from the developing section.

[0014] As can be seen from the above, this design helps to prevent the non-developing section of the scraper blade from causing damage to the photosensitive drum and ensures that the cleaning effect of the non-developing area of ​​the photosensitive drum can meet the requirements.

[0015] A further solution is that the first surface of the non-developing section facing the photosensitive drum is an inclined plane; in the thickness direction of the scraper, the first vertical distance between the inclined plane at the intersection and the axis of the photosensitive drum is smaller than the second vertical distance between the inclined plane at the first end and the axis of the photosensitive drum.

[0016] As can be seen from the above, this design allows the non-developing section of the scraper to fit the surface of the photosensitive drum better, while ensuring that the end of the non-developing section is in contact with the surface of the photosensitive drum with excessive pressure, and makes the non-developing section more elastic the closer to its end, so as to adapt to the possible jumping of the end of the photosensitive drum during the rotation of the photosensitive drum, so as to better protect the photosensitive drum.

[0017] Another preferred solution is to perform a material reduction hollowing process on the non-developing section.

[0018] A further solution is to form a blind groove on the non-developing section, which extends from the end surface of the non-developing section away from the developing section to the inside of the non-developing section in the length direction of the scraper blade; or to form a slot hole on the non-developing section, which extends from one side of the non-developing section to the other side of the non-developing section in the thickness direction of the scraper blade, or the slot hole penetrates the non-developing section in the thickness direction of the scraper blade.

[0019] It can be seen from the above that this design helps to further improve the elastic performance of the non-developing section.

[0020] A further solution is that the non-developing section has a chamfered structure, and the chamfered structure contacts the surface of the photosensitive drum.

[0021] As can be seen from the above, since the non-developing area of ​​the photosensitive drum is a non-working area, the edge of the scraper blade that contacts the photosensitive drum is chamfered to avoid the scraper blade from applying excessive pressure on the surface of the photosensitive drum. In addition to ensuring that the non-developing area of ​​the photosensitive drum has a satisfactory cleaning effect, the non-developing section of the scraper blade can be prevented from damaging the surface of the photosensitive drum, which is beneficial to extend the service life of the photosensitive drum and improve the problem of powder leakage.

[0022] In order to achieve another object of the present invention, the present invention provides a toner cartridge, including a developing unit, the developing unit including a developing frame and a developing roller, the developing roller being rotatably mounted on the developing frame around its own axis, wherein the toner cartridge also includes the above-mentioned imaging unit, the developing frame being connected to a waste toner bin, the developing roller being in detachable contact with a photosensitive drum, a photosensitive drum being provided with a photosensitive drum gear, a developing roller being provided with a developing roller gear, and the photosensitive drum gear being directly or indirectly linked to the developing roller gear.

[0023] As can be seen from the above, by providing the imaging unit, the toner cartridge can have a longer service life and can better avoid the problem of toner leakage.

[0024] A further solution is that the toner cartridge is an integrated toner cartridge; or the toner cartridge is a split toner cartridge.

[0025] As can be seen from the above, the imaging unit can be applied to an integrated toner cartridge or a split toner cartridge, has a wide range of applications, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 1 is a structural diagram of a first embodiment of a toner cartridge of the present invention.

[0027] Figure 2 It is a structural diagram of the imaging unit of the first embodiment of the toner cartridge of the present invention after some components are omitted.

[0028] Figure 3 1 is a structural diagram of a cleaning blade of a first embodiment of a toner cartridge of the present invention from a first viewing angle.

[0029] Figure 4 1 is a structural diagram of the cleaning scraper of the first embodiment of the toner cartridge of the present invention from a second viewing angle.

[0030] Figure 5 It is a structural diagram of the second imaging unit of the first embodiment of the toner cartridge of the present invention after omitting some components.

[0031] Figure 6 1 is a partial view of a cleaning blade of a second embodiment of a toner cartridge of the present invention.

[0032] Figure 7 1 is a partial view of a cleaning blade of a third embodiment of a toner cartridge of the present invention.

[0033] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0034] Toner cartridge first embodiment Reference Figure 1 The toner cartridge 100 includes an imaging unit 101 and a developing unit 102. The developing unit 102 includes a developing frame 4 and a developing roller 5. The developing roller 5 is rotatably mounted on the developing frame 4 around its axis. Of course, the developing unit 102 also includes other components, such as a powder feeding roller, a stirring frame, a powder discharging scraper, a conveying wheel set, etc. Since the aforementioned other components are consistent with the functions, effects, installation methods, and movement principles of the corresponding functional components in the existing developing unit 102, they are not described in detail here.

[0035] Combination Figure 2The imaging unit 101 includes a waste toner bin 1, a photosensitive drum 2 and a cleaning scraper 3. The photosensitive drum 2 is mounted on the waste toner bin 1 to rotate around its own axis; the cleaning scraper 3 includes a knife holder 31 and a scraper blade 32, the knife holder 31 is connected to the waste toner bin 1, the scraper blade 32 is mounted on the waste toner bin 1, and the scraper blade 32 contacts the surface of the photosensitive drum 2 to clean the photosensitive drum 2 and remove the residual toner on the surface of the photosensitive drum 2. Similarly, the imaging unit 101 also includes other components, such as a charging roller, a biasing mechanism for controlling the contact between the charging roller and the photosensitive drum 2, etc. Since the aforementioned components are consistent with the corresponding functional components in the existing imaging unit 101 in terms of function, effect, installation method, and movement principle, they will not be described in detail here. Among them, the waste toner bin 1 is movably connected with the developing frame 4, so that the photosensitive drum 2 can contact or separate from the developing roller 5; when the toner cartridge 100 is in a printing operation state, the photosensitive drum 2 and the developing roller 5 are in contact and linkage. For example, in this embodiment, a photosensitive drum gear 23 is provided on the photosensitive drum 2, and a developing roller gear 5151 is provided on the developing roller 5. When the photosensitive drum 2 and the developing roller 5 are in contact and linkage, the photosensitive drum gear 23 and the developing roller gear 5151 are meshed, so that the two can rotate in opposite directions, thereby transferring the toner on the developing roller 5 to the photosensitive drum 2; when the toner cartridge 100 is in a non-printing operation state, the photosensitive drum 2 is separated from the developing roller 5 and the linkage is released, so that the photosensitive drum gear 23 and the developing roller gear 5151 are disengaged, thereby facilitating the cleaning scraper 3 to clean the surface of the photosensitive drum 2. It should be noted that the meshing of the photosensitive drum gear 23 and the developing roller gear 5151 can be direct meshing of the photosensitive drum gear 23 and the developing roller gear 5151, or indirect meshing of the photosensitive drum gear 23 and the developing roller gear 5151 through the above-mentioned transmission wheel group.

[0036] Since the photosensitive drum 2 has a developing area 21 and a non-developing area 22, wherein the developing area 21 participates in the imaging printing operation, while the non-developing area 22 usually does not participate in the imaging printing operation, there is a certain difference between the developing area 21 and the non-developing area 22; therefore, the scraper 32 of the cleaning scraper 3 is optimized to ensure the cleaning ability and cleaning effect of the scraper 32 on the developing area 21, thereby reducing the cleaning pressure of the scraper 32 on the non-developing area 22, avoiding damage to the photosensitive drum 2, thereby extending the service life of the photosensitive drum 2, and improving the toner leakage of the toner cartridge 100. There are two non-developing areas 22, and in the axial direction of the photosensitive drum 2, the developing area 21 is located between the two non-developing areas 22.

[0037] Combination Figures 3 to 5A developing section 321 and two non-developing sections 322 are formed on the scraper blade 32. In the axial direction of the photosensitive drum 2, the developing section 321 is located between the two non-developing sections 322, so that when the cleaning scraper 3 is assembled, the developing section 321 of the scraper blade 32 contacts the developing area 21 of the photosensitive drum 2, and a non-developing section 322 of the scraper blade 32 contacts a non-developing area 22 of the photosensitive drum 2; wherein the cleaning pressure of the developing section 321 on the developing area 21 is greater than the cleaning pressure of the non-developing section 322 on the non-developing area 22.

[0038] It can be understood that, by designing the scraper blade 32 for pressure zones, the scraper blade 32 can perform targeted cleaning optimization on different areas of the photosensitive drum 2 . For example, since the developing section 321 has a relatively high cleaning pressure on the developing section 21, the developing section 321 can scrape off and clean the residual toner on the developing section 21 and recycle it into the waste toner bin 1, thereby preventing the residual toner on the photosensitive drum 2 from falling off and leaking due to factors such as vibration and friction during the continuous rotation of the photosensitive drum 2, thereby ensuring the cleaning effect of the residual toner on the developing section 21, ensuring the removal rate of the residual toner, and reducing the possibility of leakage; and reducing the cleaning pressure of the non-developing section 322, while ensuring that the non-developing section 322 meets the cleaning requirements for the non-developing section 22, reducing the wear on the non-developing section 22 (especially reducing the pressure exerted on the surface of the photosensitive drum 2 by the bottom angle of the end of the non-developing section 322 away from the developing section 321), avoiding the non-developing section 322 from damaging the surface of the photosensitive drum 2, thereby ensuring the service life of the photosensitive drum 2 and improving or even eliminating the problem of toner leakage. It can be seen that this design can solve the technical pain points of the existing technology, balance the cleaning effect of the cleaning blade 3 and the durability of the photosensitive drum 2, while avoiding printing defects and improving imaging quality.

[0039] Preferably, the scraper 32 is elastic, and the elasticity of the non-developing section 322 is greater than that of the developing section 321. Among them, the pressure zoning can be achieved by material gradient, thickness difference or local structure difference, so that complex components are not required, the structure is simplified and it is easy to mass produce. Since the developing section 321 has low elasticity (high rigidity), it is ensured that the developing section 321 applies a large cleaning pressure to the developing area 21, ensuring that the residual carbon powder in the developing area 21 is completely removed to avoid image residue and powder leakage. The non-developing section 322 has high elasticity, so that it can automatically adjust the contact force and angle with the rotation and surface condition of the photosensitive drum 2 to fit the surface of the photosensitive drum 2, ensure the cleaning effect of the non-developing area 22, and at the same time adapt to the possible jumping of the two ends of the photosensitive drum 2 during the rotation process, avoid hard friction and / or hard extrusion of the non-developing area 22 of the photosensitive drum 2, thereby preventing the surface of the photosensitive drum 2 from being damaged and extending the service life of the photosensitive drum 2. The differentiated elastic design of the scraper 32 enables its different sections to better perform their respective functions, ensuring efficient cleaning of the developing area 21, making the thickness of the toner layer reattached to the developing area 21 more uniform, and reducing interference and damage to the non-developing area 22.

[0040] The scraper blade 32 is preferably made of polyurethane material, rubber material or foamed elastic material, which can ensure the cleaning force and cleaning effect of the developing section 321 and the non-developing section 322, and better prevent the scraper blade 32 from damaging the photosensitive drum 2. In addition, the materials for making the scraper blade 32 are all mature materials in the prior art, so that the stability and reliability of the scraper blade 32 structure can be ensured, the production cost and process difficulty can be reduced, and the production and use of the scraper blade 32 can be more convenient.

[0041] Furthermore, the non-developing section 322 is provided with a chamfer structure 3222, which is located at the bottom edge of the non-developing section 322 facing the photosensitive drum 2, and the chamfer structure 3222 preferably has a small portion extending the end of the developing section 321, so that the developing section 321 and the non-developing section 322 have a smooth transition at the junction, avoiding stress concentration at the junction, ensuring the structural stability and service life of the scraper 32, and also avoiding the presence of sharp parts at the junction to damage the surface of the photosensitive drum 2. Among them, the non-developing section 322 is mainly in contact with the surface of the photosensitive drum 2 through the chamfer structure 3222. Among them, the chamfer structure 3222 can be a rounded structure or a beveled structure.

[0042] Firstly, since the non-developing area 22 of the photosensitive drum 2 is usually a non-working area, the edge where the non-developing section 322 of the scraper 32 contacts the photosensitive drum 2 is chamfered to avoid the presence of sharp structures at the contact point between the non-developing section 322 and the photosensitive drum 2, thereby preventing the scraper 32 from applying excessive pressure to the surface of the photosensitive drum 2. This ensures that the non-developing area 22 of the photosensitive drum 2 has a satisfactory cleaning effect, while preventing the non-developing section 322 of the scraper 32 from damaging the surface of the photosensitive drum 2, which is beneficial to extending the service life of the photosensitive drum 2 and improving the problem of powder leakage. Secondly, the chamfered structure 3222 can guide the flow of toner; when the scraper blade 32 scrapes off the toner, the chamfered structure 3222 can make the toner flow in a specific direction, avoiding the accumulation of toner in the contact area between the scraper blade 32 and the photosensitive drum 2, helping to smoothly guide the toner to the waste toner collection area, improving the toner collection efficiency, reducing toner residue, thereby improving the clarity and quality of imaging, and preventing problems such as toner pollution; and, the chamfered structure 3222 may avoid toner splashing during the scraping process, making the flow of toner smoother and more controllable, reducing the occurrence of toner splashing due to greater impact force, keeping the interior of the electronic photographic imaging device clean, and reducing the risk of equipment failure caused by toner splashing.

[0043] In this embodiment, the thickness of the non-developing section 322 gradually decreases from the junction of the non-developing section 322 and the developing section 321 to the first end of the non-developing section 322 away from the developing section 321. Since the elasticity of the non-developing section 322 is greater than that of the developing section 321, the gradual decrease in thickness can make the pressure form a gradual effect from the junction with the developing section 321 to the first end of the non-developing section 322 when the non-developing section 322 contacts the non-developing area 22 of the photosensitive drum 2. At the junction, the thickness is relatively large, and the pressure can be relatively large, ensuring that a small amount of impurities such as toner that may remain after the developing section 321 is cleaned can be effectively received; and as the thickness gradually decreases toward the first end, the pressure gradually decreases, and the edge of the non-developing area 22 and other parts can be gently cleaned to avoid damage to the non-developing area 22 due to excessive pressure. It can be seen that this thickness design can make the non-developing section 322 better adapt to the cleaning requirements of different positions of the non-developing area 22 of the photosensitive drum 2; the part of the non-developing area 22 close to the developing area 21 may have more carbon powder residue, and a relatively large thickness and pressure can better clean it; and the first end away from the developing area 21 usually has less carbon powder, and a smaller thickness and pressure can not only complete basic cleaning, but also will not have unnecessary impact on the surface of the photosensitive drum 2, and achieve comprehensive and fine cleaning of the non-developing area 22. Furthermore, the gradually decreasing thickness of the non-developing section 322 makes the first end away from the developing area 21 have the best elasticity, which can better adapt to the possible jumping of the two ends during the rotation of the photosensitive drum 2, and avoid the hard collision between the surface of the photosensitive drum 2 and the end of the scraper, that is, it can protect the photosensitive drum 2, the imaging unit 101 and the scraper, and can also prevent the carbon powder (i.e., waste powder) on the photosensitive drum 2 and / or the scraper 32 from falling due to the vibration caused by the impact, thereby improving the powder leakage problem.

[0044] Furthermore, the first surface of the non-developing section 322 facing the photosensitive drum 2 is an inclined plane 3221, and the second surface of the developing section 321 facing the photosensitive drum 2 is a plane, and the angle between the plane and the inclined plane 3221 is an obtuse angle; that is, Figure 5 As shown, in the thickness direction of the scraper 32, a first vertical distance L1 between the inclined plane 3221 at the intersection and the axis of the photosensitive drum 2 is smaller than a second vertical distance L2 between the inclined plane 3221 at the first end and the axis of the photosensitive drum 2.

[0045] The design of the inclined plane 3221 makes the contact pressure between the non-developing section 322 and the surface of the photosensitive drum 2 present a specific distribution. Since the intersection is closer to the axis of the photosensitive drum 2, when contacting the photosensitive drum 2, a relatively large pressure will be generated at the intersection, which helps to better remove a small amount of residual toner and other impurities that may be brought from the developing area 21; and as the vertical distance gradually increases toward the first end, the pressure gradually decreases relatively, and the edge of the non-developing area 22 and other parts can be gently cleaned, achieving targeted pressure distribution at different positions of the non-developing area 22, thereby improving the cleaning effect. In addition, the inclined plane 3221 can play a role in guiding the toner to a certain extent. In the process of the scraper 32 rotating with the photosensitive drum 2 for cleaning, the inclined plane 3221 can make the scraped toner gather or flow to a specific position along the inclined direction, which is conducive to more effectively collecting the toner into the waste toner bin 1, reducing the residue and diffusion of toner in the non-developing area 22, and further improving the cleaning effect and imaging quality.

[0046] In summary, it can be seen that by designing the imaging unit 101 of the toner cartridge 100, the toner cartridge 100 and the imaging unit 101 can have a longer service life and can avoid the problem of powder leakage; wherein, the toner cartridge 100 can be set as an integrated toner cartridge 100 or a split toner cartridge 100 according to different types of electronic photographic imaging equipment, usage requirements, design requirements, etc., so that the toner cartridge 100 has a wider range of applications and stronger practicality.

[0047] Toner cartridge second embodiment Reference Figure 6 The difference between this embodiment and the first embodiment of the toner cartridge lies in the structural design of the non-developing section of the scraper blade, specifically: The non-developing section 61 of the scraper 6 is hollowed out by reducing the material to enhance the elasticity of the non-developing section 61. In this embodiment, the non-developing section 61 can still maintain the design of gradually decreasing thickness from the junction of the non-developing section 61 and the developing section to the first end of the non-developing section 61 away from the developing section; in addition, a blind groove 611 is formed on the non-developing section 61, and the blind groove 611 extends from the end surface of the non-developing section 61 away from the developing section to the inside of the non-developing section 61 in the length direction of the scraper 6, so as to realize the hollowing out of the non-developing section 61. Of course, in some embodiments, the design of gradually decreasing thickness of the non-developing section 61 can be cancelled, and only the above-mentioned blind groove 611 is formed on the non-developing section 61.

[0048] Toner cartridge third embodiment Reference Figure 7 The difference between this embodiment and the second embodiment of the toner cartridge lies in the reduced material hollowing structure of the non-developing section of the scraper blade, specifically: In this embodiment, the blind groove structure on the non-developing section 71 is eliminated, and a slot hole 711 is formed on the non-developing section 71, wherein the slot hole 711 extends from one side of the non-developing section 71 to the other side of the non-developing section 71 in the thickness direction of the scraper 7 and penetrates the non-developing section 71 in the thickness direction of the scraper 7. Of course, as other optional schemes, in some embodiments, the slot hole 711 may not penetrate the non-developing section 71 in the thickness direction of the scraper 7. Among them, the number of the slot holes 711 may be more than two, and the more than two slot holes 711 are preferably distributed according to a certain rule, such as more than two slot holes 711 may be distributed linearly, and more than four slot holes 711 may be distributed in a rectangular shape (that is, distributed in N rows and M columns, where N≥2, M≥2), and more than four slot holes 711 may be distributed in a circular shape, and so on; therefore, they are not listed one by one here.

[0049] 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. Imaging unit, comprising: Waste toner bin; A photosensitive drum, wherein the photosensitive drum is rotatably mounted on the waste toner bin around its own axis; A cleaning scraper, the cleaning scraper is mounted on the waste toner bin, the cleaning scraper comprises a scraper blade, and the scraper blade contacts the surface of the photosensitive drum; Features: The scraper blade has a developing section and two non-developing sections, the developing section is located between the two non-developing sections, the developing section is in contact with the developing section of the photosensitive drum, the non-developing section is in contact with the non-developing section of the photosensitive drum, and the cleaning pressure of the developing section on the developing section is greater than the cleaning pressure of the non-developing section on the non-developing section.

2. The imaging unit according to claim 1, characterized in that: The scraper blade is elastic; The elasticity of the non-developing section is greater than the elasticity of the developing section.

3. The imaging unit according to claim 2, characterized in that: The scraper blade is made of polyurethane material, rubber material or foamed elastic material.

4. The imaging unit according to claim 2, characterized in that: The thickness of the non-developing section gradually decreases from the junction of the non-developing section and the developing section to the first end of the non-developing section away from the developing section.

5. The imaging unit according to claim 4, characterized in that: The first surface of the non-developing section facing the photosensitive drum is an inclined plane; In the thickness direction of the scraper blade, a first vertical distance between the inclined plane at the intersection and the axis of the photosensitive drum is smaller than a second vertical distance between the inclined plane at the first end and the axis of the photosensitive drum.

6. The imaging unit according to claim 2, characterized in that: The non-developing section is hollowed out by material reduction.

7. The imaging unit according to claim 6, characterized in that: A blind groove is formed on the non-developing section, and the blind groove extends from the end surface of the non-developing section away from the developing section to the inside of the non-developing section in the length direction of the scraper; or The non-developing section is formed with a slot, and the slot extends from one side of the non-developing section to the other side of the non-developing section in the thickness direction of the scraper, or The slot hole penetrates the non-developing section in a thickness direction of the doctor blade.

8. The imaging unit according to any one of claims 1 to 7, characterized in that: The non-developing section has a chamfered structure, and the chamfered structure contacts a surface of the photosensitive drum.

9. A toner cartridge, comprising a developing unit, wherein the developing unit comprises: Development frame; A developing roller, the developing roller is rotatably mounted on the developing frame around its own axis; Features: The toner cartridge also includes an imaging unit as described in any one of claims 1 to 8, the developing frame is connected to the waste toner bin, the developing roller is in detachable contact with the photosensitive drum, a photosensitive drum gear is provided on the photosensitive drum, a developing roller gear is provided on the developing roller, and the photosensitive drum gear is directly or indirectly linked to the developing roller gear.

10. The toner cartridge according to claim 9, characterized in that: The toner cartridge is an integrated toner cartridge; or The toner cartridge is a split toner cartridge.

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