Integrated toner cartridge and electrophotographic imaging equipment

Abstract

The invention provides an integrated toner cartridge and an electrophotographic imaging device.The integrated toner cartridge comprises an imaging unit and a developing unit, the imaging unit comprises a waste toner bin, a photosensitive drum and a transmission wheel set, the photosensitive drum is rotationally installed on the waste toner bin, a photosensitive drum gear is arranged at the end of the photosensitive drum, and the transmission wheel set is arranged on the photosensitive drum gear; the developing unit comprises a powder bin, a developing roller and a stirring frame, the developing roller is rotationally installed on the powder bin, a developing roller gear is arranged at the end of the developing roller and meshed with the photosensitive drum gear, the stirring frame is rotationally installed on the powder bin, a stirring frame gear is arranged at the end of the stirring frame, and the stirring frame gear is meshed with the photosensitive drum gear. The transmission wheel set comprises a first idle wheel and a second idle wheel, the first idle wheel is meshed with the photosensitive drum gear, and the second idle wheel is meshed between the first idle wheel and the stirring frame gear. The electrophotographic imaging equipment is provided with the integrated toner cartridge, and the integrated toner cartridge adopts parallel power transmission, so that the transmission torque can be reduced, and the smooth transmission of the toner can be ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of electrophotographic imaging, and specifically, it is to design an integrated toner cartridge and an electrophotographic imaging device provided with the integrated toner cartridge. Background Art

[0002] The toner cartridge (such as an integrated toner cartridge, a split toner cartridge, etc.) is one of the core components in an electrophotographic imaging device, which plays a role in storing toner and converting the electrostatic latent image formed on the photosensitive drum into a visible image through the developing process. The toner cartridge includes a photosensitive unit and a developing unit. The photosensitive unit includes a waste toner bin and components such as a photosensitive drum, a charging roller, and a cleaning blade installed on the waste toner bin. The developing unit includes a powder bin and components such as a developing roller, a stirring frame, and a powder outlet blade installed on the powder bin. Among them, components such as the photosensitive drum, the developing roller, and the stirring frame are driven by a gear set to realize that the power input by the drive source is respectively controlled to rotate the components such as the photosensitive drum, the developing roller, and the stirring frame through the gear set.

[0003] Currently, the driving force transmission method of the integrated toner cartridge is a series-type power transmission. As Figure 1 shown, the photosensitive drum gear 91 cooperates with the coupling concave portion provided on the driving head through the coupling convex portion 911 thereon to receive the driving force, so that the power input by the drive source is first transmitted to the photosensitive drum gear 91, then from the photosensitive drum gear 91 to the developing roller gear 92, then from the developing roller gear 92 to the first idler gear 931 of the gear set 93, then from the first idler gear 931 to the second idler gear 932 of the gear set 93, and finally from the second idler gear 932 to the stirring frame gear 94. However, this series-type power transmission has the disadvantages of large transmission torque and complex transmission structure, making it extremely easy for wear to occur at the coupling convex portion 911 and the coupling concave portion, causing damage to the photosensitive drum gear 91, the driving head, and the driving mechanism, shortening the service life of the integrated toner cartridge and the electrophotographic imaging device. In addition, too large transmission torque will also affect the toner transfer effect, thereby affecting the printing quality. Summary of the Invention

[0004] In order to solve the above problems, the main object of the present invention is to provide an integrated toner cartridge that adopts a parallel-type power transmission, can reduce the transmission torque, and ensure smooth toner transfer.

[0005] Another object of the present invention is to provide an electrophotographic imaging device provided with the above integrated toner cartridge.

[0006] To achieve the first object of the present invention, the present invention provides an integrated toner cartridge, which includes an imaging unit and a developing unit. The imaging unit includes a waste toner bin and a photosensitive drum. The photosensitive drum is rotatably mounted on the waste toner bin. A photosensitive drum gear is provided at an end of the photosensitive drum. A coupling protrusion is formed at an end of the photosensitive drum gear away from the drum body of the photosensitive drum. The developing unit includes a powder bin, a developing roller and a stirring frame. The developing roller is rotatably mounted on the powder bin. A developing roller gear is provided at an end of the developing roller. The developing roller gear meshes with the photosensitive drum gear. The stirring frame is rotatably mounted on the powder bin. A stirring frame gear is provided at an end of the stirring frame. Wherein, the integrated toner cartridge further includes a transmission wheel set. The transmission wheel set includes a first idler gear and a second idler gear. The first idler gear meshes with the photosensitive drum gear. The second idler gear meshes between the first idler gear and the stirring frame gear.

[0007] As can be seen from the above, this design enables a parallel power transmission between the photosensitive drum gear and the developing roller gear, between the photosensitive drum gear and the transmission wheel set and the stirring frame gear, enabling the photosensitive drum gear to synchronously transmit the driving force, thereby effectively reducing the transmission torque, solving the problem of large transmission torque existing in the traditional series power transmission, and at the same time making the transfer of toner in the powder bin smoother. In addition, it can also avoid damage to the photosensitive drum gear and the driving head of the electrophotographic imaging device caused by excessive transmission torque, and extend the service life of the integrated toner cartridge and the electrophotographic imaging device; furthermore, the above design can also effectively improve the transmission efficiency and reduce energy loss.

[0008] A preferred solution is that the first idler gear has a first tooth portion and a second tooth portion. The first tooth portion meshes with the photosensitive drum gear. The first pitch circle diameter of the first tooth portion is smaller than the fifth pitch circle diameter of the photosensitive drum gear. The second pitch circle diameter of the second tooth portion is smaller than the first pitch circle diameter; the second idler gear has a third tooth portion and a fourth tooth portion. The third tooth portion meshes with the second tooth portion. The third pitch circle diameter of the third tooth portion is larger than the second pitch circle diameter. The fourth pitch circle diameter of the fourth tooth portion is smaller than the third pitch circle diameter. The fourth tooth portion meshes with the stirring frame gear. The fourth pitch circle diameter is smaller than the sixth pitch circle diameter of the stirring frame gear.

[0009] As can be seen from the above, this design can achieve independent transmission ratio control, optimize the transmission ratio design, and at the same time can achieve load sharing for the first idler gear and the second idler gear, reducing the tooth surface contact stress.

[0010] A further solution is that the third pitch circle diameter is 1.2 to 2 times the second pitch circle diameter; the sixth pitch circle diameter is 1.8 to 2.5 times the fourth pitch circle diameter.

[0011] As can be seen from the above, this design can ensure that the rotation speed of the stirring frame and the stirring effect on the toner in the powder bin both meet the use requirements, while ensuring the transmission efficiency and dynamic stability.

[0012] Another preferred solution is that both the first idler gear and the second idler gear are single-layer gears.

[0013] As can be seen from the above, while ensuring that the rotation of the stirring frame meets the requirements, this design simplifies the structures of the first idler gear and the second idler gear, and at the same time reduces the space occupied by the first idler gear and the second idler gear, which is beneficial to increasing the capacity of the powder bin.

[0014] A further solution is that the pitch circle diameter of the first idler gear is smaller than that of the photosensitive drum gear, and the pitch circle diameter of the first idler gear is equal to that of the second idler gear. The pitch circle diameter of the stirring frame gear is 1.8 to 2.5 times that of the second idler gear.

[0015] As can be seen from the above, through the above design, the transmission ratio between the photosensitive drum gear, the transmission wheel set and the stirring frame gear can be equivalent to the transmission ratio between the photosensitive drum gear, the first idler gear (or the second idler gear) and the stirring frame gear. Thus, it is possible to both reduce the diameter of the stirring frame gear, prevent the over-occupation of the space inside the electrophotographic imaging device due to the too large diameter of the stirring frame gear, and avoid the need to specifically design an avoidance space and / or an avoidance structure for the stirring frame gear inside the electrophotographic imaging device, simplifying the structure of the electrophotographic imaging device. At the same time, it can also reduce the bending stress of the teeth of each gear and avoid the overloading of the teeth of each gear.

[0016] Another preferred solution is that the developing roller gear is a single-layer gear.

[0017] As can be seen from the above, since the developing roller gear part does not need to participate in other subsequent transmissions, by designing the developing roller gear as a single-layer gear, the space occupied by the developing roller gear can be effectively reduced, which is then beneficial to increasing the capacity of the powder bin.

[0018] Another preferred solution is that the photosensitive drum gear, the developing roller gear, the stirring frame gear, the first idler gear and the second idler gear are all helical gears.

[0019] As can be seen from the above, this design can improve the smoothness of transmission, make each gear have stronger load-bearing capacity and higher transmission effect, and at the same time can also adapt to the high-speed heavy-load transmission environment to ensure that the stirring frame and the developing roller can meet the usage requirements.

[0020] A further solution is that the waste powder bin is movably connected to the powder bin, and both the developing roller gear and the first idler gear are detachably meshed with the photosensitive drum gear.

[0021] As can be seen from the above, the detachable meshing of the developing roller gear and the first idler gear with the photosensitive drum gear can make the cleaning of the photosensitive drum more convenient, and at the same time also reduce the load and energy consumption of the drive mechanism of the electrophotographic imaging device during the cleaning process of the photosensitive drum.

[0022] A further solution is that the imaging unit further includes a charging roller and a cleaning blade. Both the charging roller and the cleaning blade are installed in the waste toner bin. The cutting edges of the charging roller and the cleaning blade are in contact with the photosensitive drum. Along the rotation direction of the photosensitive drum, the cleaning blade is located at the upstream end of the charging roller. The developing unit further includes a powder discharging blade, which is installed on the powder bin, and the cutting edge of the powder discharging blade is in contact with the developing roller.

[0023] As can be seen from the above, the charging roller is used to charge the photosensitive drum, so that an electrostatic latent image is formed on the surface of the photosensitive drum after being irradiated by a laser beam. The cleaning blade can clean the surface of the photosensitive drum to ensure the uniformity of the toner adhering to the electrostatic latent image, thereby ensuring the imaging quality. The powder discharging blade is used to control the thickness and uniformity of the toner layer on the developing roller, so that the toner on the developing roller can be evenly transferred to the electrostatic latent image formed on the photosensitive drum, thereby ensuring the imaging quality.

[0024] To achieve another object of the present invention, the present invention provides an electrophotographic imaging device, including a body and a driving mechanism. The body has a cartridge installation cavity. The driving mechanism is installed inside the body, and the driving head of the driving mechanism extends into the cartridge installation cavity. The protruding end of the driving head has a coupling recess. Among them, the above-mentioned integrated toner cartridge is installed in the cartridge installation cavity, and the coupling recess is connected with the coupling protrusion in a matching manner.

[0025] As can be seen from the above, by using the above-mentioned integrated toner cartridge, the electrophotographic imaging device can extend the service life of its driving mechanism. Brief Description of the Drawings

[0026] Figure 1 It is a partial structure diagram of the existing integrated toner cartridge of the present invention with some components omitted.

[0027] Figure 2 It is a structure diagram of the first embodiment of the integrated toner cartridge of the present invention.

[0028] Figure 3 It is a partial structure diagram of the first embodiment of the integrated toner cartridge of the present invention with some components omitted for the first time.

[0029] Figure 4 It is a partial structure diagram of the first embodiment of the integrated toner cartridge of the present invention with some components omitted for the second time.

[0030] Figure 5 It is a partial structure diagram of the second embodiment of the integrated toner cartridge of the present invention with some components omitted for the first time.

[0031] Figure 6 It is a partial structure diagram of the second embodiment of the integrated toner cartridge of the present invention with some components omitted for the second time.

[0032] The present invention will be further described below in conjunction with the drawings and embodiments. Detailed implementation mode

[0033] First embodiment of an integrated toner cartridge Refer to Figures 2 to 4 , the integrated toner cartridge 100 includes an imaging unit 1, a developing unit 2 and a driving wheel set 3.

[0034] The imaging unit 1 includes a waste toner bin 11, a photosensitive drum 12, a charging roller and a cleaning blade. The photosensitive drum 12 is rotatably mounted on the waste toner bin 11 around its own axis. A photosensitive drum gear 121 is provided at the end of the photosensitive drum 12. Among them, a coupling convex portion 1211 is imaged at one end of the photosensitive drum gear 121 away from the drum body of the photosensitive drum 12. The coupling convex portion 1211 is used for docking with the driving head 4 of the driving mechanism in the electrophotographic imaging device. Specifically, a coupling concave portion 41 that cooperates with the coupling convex portion 1211 is provided at the protruding end of the driving head 4. When the integrated toner cartridge 100 is installed in the cartridge installation cavity in the electrophotographic imaging device, the coupling convex portion 1211 of the photosensitive drum gear 121 is docked with the coupling concave portion 41 of the driving head 4, so that the driving head 4 can drive the photosensitive drum 12 to rotate.

[0035] The charging roller is installed on the waste toner bin 11, and the charging roller is in parallel contact with the photosensitive drum 12 approximately. The charging roller is used to charge the photosensitive drum 12, so that an electrostatic latent image is formed on the surface of the photosensitive drum 12 after being irradiated by the laser beam in the electrophotographic imaging device, so as to develop the electrostatic latent image when the toner of the developing unit 2 is transferred to the electrostatic latent image of the photosensitive drum 12.

[0036] The cleaning blade is installed on the waste toner bin 11, and the blade portion of the cleaning blade is in contact with the surface of the photosensitive drum 12. Along the rotation direction of the photosensitive drum 12, the cleaning blade is located at the upstream end of the charging roller. The cleaning blade is used to clean the photosensitive drum 12 after the transfer action is completed, so as to scrape off the residual waste toner on the photosensitive drum 12 and recycle the waste toner into the waste toner bin 11.

[0037] The developing unit 2 includes a powder bin 21, a developing roller 22, a stirring frame 23 and a powder outlet blade. The powder bin 21 is movably connected to the waste toner bin 11, and toner is stored in the powder bin 21 to realize the toner supply of the integrated toner cartridge 100. The developing roller 22 is rotatably mounted on the powder bin 21 around its own rotation axis, and the developing roller 22 is located at the powder outlet of the powder bin 21, so that the developing roller 22 can transfer the toner in the powder bin 21 to the photosensitive drum 12; a developing roller gear 221 is provided at the end of the developing roller 22. The developing roller gear 221 is detachably engaged with the photosensitive drum gear 121 through the movable connection between the powder bin 21 and the waste toner bin 11, so that the photosensitive drum 12 can drive the developing roller 22 to rotate synchronously through the photosensitive drum gear 121 and the developing roller gear 221.

[0038] The stirring frame 23 is rotatably installed on the powder bin 21. The stirring frame 23 is used to stir the toner stored in the powder bin 21 to prevent the toner from solidifying into lumps. Among them, a stirring frame gear 231 is provided at the end of the stirring frame 23.

[0039] The powder discharging blade is installed on the powder bin 21. The blade part of the powder discharging blade is located at the air outlet of the powder bin 21 and contacts the surface of the developing roller 22. The powder discharging blade is used to scrape the toner adsorbed on the surface of the developing roller 22 evenly, so that the toner adsorbed on the developing roller 22 is evenly distributed, and the thickness of the toner layer is kept consistent, ensuring the developing quality of the electrostatic latent image and the imaging quality.

[0040] The transmission wheel set 3 includes a first idler wheel 31 and a second idler wheel 32. Among them, the first idler wheel 31 meshes with the photosensitive drum gear 121, and the second idler wheel 32 meshes between the first idler wheel 31 and the stirring frame gear 231. Preferably, the first idler wheel 31 is detachably meshed with the photosensitive drum gear 121 through the movable connection between the powder bin 21 and the waste powder bin 11. By making the developing roller gear 221, the first idler wheel 31 and the photosensitive drum gear 121 detachably meshed, the cleaning of the photosensitive drum 12 is more convenient, and at the same time, the load and energy consumption of the driving mechanism of the electrophotographic imaging device during the cleaning process of the photosensitive drum 12 are also reduced.

[0041] Through the design of the linkage mode of the transmission wheel set 3, the transmission chain between the photosensitive drum gear 121 and the developing roller gear 221, and the transmission chain between the photosensitive drum gear 121, the transmission wheel set 3 and the stirring frame gear 231 are in a parallel power transmission mode. When the photosensitive drum gear 121 realizes synchronous transmission of the driving force, the transmission torque is reduced, effectively solving the problem of excessive transmission torque existing in the traditional series power transmission, and making the transmission of the toner in the powder bin 21 (mainly transmitted to the developing roller 22) smoother. In addition, this design can also effectively avoid damage to the photosensitive drum gear 121, the driving head 4, etc. caused by excessive transmission torque, which is beneficial to extending the service life of the integrated toner cartridge 100 and the electrophotographic imaging device; furthermore, since the number of transmission stages on a single transmission chain is reduced, the transmission efficiency can be effectively improved and the energy loss can be reduced.

[0042] In addition, two idler gears are used to connect the photosensitive drum gear 121 and the agitator gear 231, which can avoid the problem of the agitator gear 231 being too large when only one idler gear is used to connect the photosensitive drum gear 121 and the agitator gear 231. Furthermore, it can not only avoid the problem of excessive occupation of the internal space of the electrophotographic imaging device due to the large size of the agitator gear 231, but also eliminate the need for the electrophotographic imaging device to specifically design an avoidance space and / or avoidance structure for the agitator gear 231, thus simplifying the structure of the electrophotographic imaging device. Moreover, it can also reduce the bending stress of the teeth of each gear [such as the photosensitive drum gear 121, the agitator gear 231, and the idler gear (when there is only one)], avoid the overloading of the teeth of each gear and the excessive single-stage transmission ratio, and ensure the lubrication reliability and transmission stability.

[0043] In addition, based on the above design, the developing roller gear 221 is preferably a single-layer gear. Since the part of the developing roller gear 221 does not need to participate in other subsequent transmissions, by designing the developing roller gear 221 as a single-layer gear, the space occupied by the developing roller gear 221 can be effectively reduced, which is beneficial to increasing the capacity of the powder bin 21, and at the same time simplifies the structures of the developing roller gear 221 and the powder bin 21.

[0044] In this embodiment, the first idler gear 31 has a first tooth part 311 and a second tooth part 312. Among them, the first tooth part 311 meshes with the photosensitive drum gear 121, and the first pitch circle diameter of the first tooth part 311 is smaller than the fifth pitch circle diameter of the photosensitive drum gear 121. This design can avoid the first idler gear 31 from excessively occupying the internal space of the integrated toner cartridge 100. And since the transmission wheel set 3 has two idler gears, the rotational speed of the agitator 23 can be adjusted through the structural design of the two idler gears, so as to ensure that the rotational speed of the agitator 23 matches the rotational speeds of the photosensitive drum 12 and the developing roller 22, thereby ensuring the imaging quality. The second pitch circle diameter of the second tooth part 312 is smaller than the first pitch circle diameter of the first tooth part 311.

[0045] The second idler gear 32 has a third tooth part 321 and a fourth tooth part 322. The third tooth part 321 meshes with the second tooth part 312, and the third pitch circle diameter of the third tooth part 321 is larger than the second pitch circle diameter of the second tooth part 312. The fourth pitch circle diameter of the fourth tooth part 322 is smaller than the third pitch circle diameter of the third tooth part 321. The fourth tooth part 322 meshes with the agitator gear 231, and the fourth pitch circle diameter of the fourth tooth part 322 is smaller than the sixth pitch circle diameter of the agitator gear 231, thereby effectively balancing the speed-increasing transmission between the first idler gear 31 and the photosensitive drum gear 121.

[0046] Compared with the single idler wheel used to connect the photosensitive drum gear 121 and the stirring frame gear 231, the present invention realizes independent transmission ratio control and optimizes the transmission ratio design by designing the first idler wheel 31 and the second idler wheel 32, and realizes load diversion for the first idler wheel 31 and the second idler wheel 32 to reduce the contact stress of the tooth surface. Furthermore, the first idler wheel 31 and the second idler wheel 32 adopt a double gear structure, which can better reduce the space occupied by the transmission wheel group 3, thereby ensuring the capacity of the powder bin 21, compared with using two coaxially distributed gears to replace the first idler wheel 31 and two coaxially distributed gears to replace the second idler wheel 32.

[0047] Among them, the third pitch circle diameter of the third tooth portion 321 is preferably 1.2 to 2 times the second pitch circle diameter of the second tooth portion 312; the sixth pitch circle diameter of the stirring frame gear 231 is preferably 1.8 to 2.5 times the fourth pitch circle diameter of the fourth tooth portion 322; the first pitch circle diameter of the first tooth portion 311 is preferably 1.01 to 1.2 times the second pitch circle diameter; the fifth pitch circle diameter of the photosensitive drum gear 121 is preferably 1.5 to 2.5 times the pitch circle diameter of the first tooth portion 311. This design can ensure that the rotation speed of the stirring frame 23 and the stirring effect on the carbon powder in the powder bin 21 meet the use requirements, while ensuring transmission efficiency and dynamic stability. In addition, the photosensitive drum gear 121, the developing roller gear 221, the stirring frame gear 231, the first idler gear 31 and the second idler gear 32 are preferably all bevel gears to improve the smoothness of the transmission and enable each gear to have a stronger load-bearing capacity and a higher transmission effect. At the same time, they can also adapt to high-speed and heavy-load transmission environments to ensure that the stirring frame 23 and the developing roller 22 can meet the use requirements.

[0048] In summary, it can be seen that through the design of the integrated toner cartridge 100, the transmission chain between the photosensitive drum gear 121 and the developing roller gear 221, the transmission chain between the photosensitive drum gear 121 and the transmission wheel group 3 and the stirring frame gear 231 are in parallel power transmission. When the photosensitive drum gear 121 realizes synchronous transmission of driving force, the transmission torque is reduced, which effectively solves the problem of excessive transmission torque in traditional serial power transmission, avoids damage to the toner cartridge, electronic photographic imaging equipment, etc. due to excessive transmission torque, extends the service life of the toner cartridge and the electronic photographic imaging equipment, and at the same time can make the transmission of toner in the powder bin 21 smoother; furthermore, the transmission connection of the parallel power transmission can reduce the space occupied by the gear group (including the photosensitive drum gear 121, the developing roller gear 221, the stirring frame gear 231, the transmission wheel group 3, etc.), helps to increase the capacity of the powder bin 21, and can also improve the transmission efficiency and reduce energy loss.

[0049] Second embodiment of integrated toner cartridge Reference Figure 5 and Figure 6, the difference between this embodiment and the first embodiment of the integrated toner cartridge lies in the structures of the first idler gear 51 and the second idler gear 52. Specifically, in this embodiment: Both the first idler gear 51 and the second idler gear 52 are single-layer gears. This design simplifies the structures of the first idler gear 51 and the second idler gear 52 while ensuring that the rotation of the stirring frame 23 meets the requirements, and at the same time reduces the space occupied by the first idler gear 51 and the second idler gear 52, which is beneficial to increasing the toner cartridge capacity.

[0050] The pitch circle diameter of the first idler gear 51 is smaller than that of the photosensitive drum gear 121, and the pitch circle diameter of the first idler gear 51 is equal to that of the second idler gear 52. Through the above design, the transmission ratio between the photosensitive drum gear 121, the transmission wheel set 5 and the stirring frame gear 231 can be equivalent to the transmission ratio between the photosensitive drum gear 121, the first idler gear 51 (or the second idler gear 52), and the stirring frame gear 231. Thus, it can not only reduce the diameter of the stirring frame gear 231, prevent the over-occupation of the space inside the electrophotographic imaging device due to the too large diameter of the stirring frame gear 231, and avoid the need to specifically design an avoidance space and / or avoidance structure for the stirring frame gear 231 inside the electrophotographic imaging device, simplifying the structure of the electrophotographic imaging device, but also reduce the bending stress of the teeth of each gear and avoid the overloading of the teeth of each gear. Among them, the pitch circle diameter of the stirring frame gear 231 is preferably 1.8 to 2.5 times that of the second idler gear 52; the pitch circle diameter of the photosensitive drum gear 121 is preferably 1.5 to 2.5 times that of the first idler gear 51.

[0051] Embodiment of an electrophotographic imaging device The embodiment of the electrophotographic imaging device includes a body, a driving mechanism, and an integrated toner cartridge. Among them, the integrated toner cartridge is the integrated toner cartridge described in the first embodiment or the second embodiment of the above integrated toner cartridge. The body has a cartridge installation cavity, the driving mechanism is installed inside the body, the driving head of the driving mechanism extends into the cartridge installation cavity, and the protruding end of the driving head has a connecting recess. The integrated toner cartridge is inside the cartridge installation cavity, and the connecting recess of the driving head is in mating connection with the connecting convex portion of the photosensitive drum gear. By using the above integrated toner cartridge, the electrophotographic imaging device can extend its service life with the integrated toner cartridge.

[0052] Finally, it should be emphasized that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. One-piece toner cartridge, comprising: An imaging unit, the imaging unit includes a waste toner bin and a photosensitive drum, the photosensitive drum is rotatably mounted on the waste toner bin, a photosensitive drum gear is provided at an end of the photosensitive drum, and a coupling convex portion is formed at an end of the photosensitive drum gear away from the drum body of the photosensitive drum; A developing unit, the developing unit includes a powder bin, a developing roller and a stirring frame, the developing roller is rotatably mounted on the powder bin, a developing roller gear is provided at an end of the developing roller, the developing roller gear meshes with the photosensitive drum gear, the stirring frame is rotatably mounted on the powder bin, and a stirring frame gear is provided at an end of the stirring frame; It is characterized in that the one-piece toner cartridge further includes a transmission wheel set, and the transmission wheel set includes: A first idler gear, the first idler gear meshes with the photosensitive drum gear; A second idler gear, the second idler gear meshes between the first idler gear and the stirring frame gear.

2. The one-piece toner cartridge according to claim 1, characterized in that: The first idler gear has a first tooth portion and a second tooth portion, the first tooth portion meshes with the photosensitive drum gear, a first pitch circle diameter of the first tooth portion is smaller than a fifth pitch circle diameter of the photosensitive drum gear, and a second pitch circle diameter of the second tooth portion is smaller than the first pitch circle diameter; The second idler gear has a third tooth portion and a fourth tooth portion, the third tooth portion meshes with the second tooth portion, a third pitch circle diameter of the third tooth portion is larger than the second pitch circle diameter, a fourth pitch circle diameter of the fourth tooth portion is smaller than the third pitch circle diameter, the fourth tooth portion meshes with the stirring frame gear, and the fourth pitch circle diameter is smaller than a sixth pitch circle diameter of the stirring frame gear.

3. The one-piece toner cartridge according to claim 2, characterized in that: The third pitch circle diameter is 1.2 times to 2 times of the second pitch circle diameter; The sixth pitch circle diameter is 1.8 times to 2.5 times of the fourth pitch circle diameter.

4. The one-piece toner cartridge according to claim 1, characterized in that: Both the first idler gear and the second idler gear are single-layer gears.

5. The one-piece toner cartridge according to claim 4, characterized in that: A pitch circle diameter of the first idler gear is smaller than a pitch circle diameter of the photosensitive drum gear, and the pitch circle diameter of the first idler gear is equal to a pitch circle diameter of the second idler gear, and a pitch circle diameter of the stirring frame gear is 1.8 times to 2.5 times of the pitch circle diameter of the second idler gear.

6. The one-piece toner cartridge according to claim 1, characterized in that: The developing roller gear is a single-layer gear.

7. The one-piece toner cartridge according to claim 1, characterized in that: The photosensitive drum gear, the developing roller gear, the stirring frame gear, the first idler gear and the second idler gear are all helical gears.

8. The one-piece toner cartridge according to any one of claims 1 to 7, characterized in that: The waste toner bin is movably connected to the powder bin, and both the developing roller gear and the first idler gear are detachably meshed with the photosensitive drum gear.

9. The one-piece toner cartridge according to claim 8, characterized in that: The imaging unit further includes a charging roller and a cleaning blade. The charging roller and the cleaning blade are both installed in the waste toner bin. The edges of the charging roller and the cleaning blade are both in contact with the photosensitive drum. Along the rotation direction of the photosensitive drum, the cleaning blade is located at the upstream end of the charging roller; The developing unit further includes a powder discharging blade. The powder discharging blade is installed on the powder bin, and the edge of the powder discharging blade is in contact with the developing roller.

10. An electrophotographic imaging apparatus, comprising a body and a driving mechanism. The body has a cartridge mounting cavity. The driving mechanism is installed inside the body. The driving head of the driving mechanism extends into the cartridge mounting cavity, and the protruding end of the driving head has a coupling recess, characterized in that: The integrated toner cartridge according to any one of claims 1 to 9 is installed in the cartridge mounting cavity, and the coupling recess is in mating connection with the coupling protrusion.

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