Processing box

Abstract

The utility model provides a processing box. The processing box comprises a developing box and a drum box, the developing box comprises a powder bin, a developing roller, a powder feeding roller and a first driving part, and the first driving part drives the developing roller and the powder feeding roller to rotate; the drum box comprises a waste powder bin, a photosensitive drum and a second driving part, the photosensitive drum is rotatably mounted in the waste powder bin, the second driving part is arranged at the first end of the processing box and drives the photosensitive drum to rotate, and the photosensitive drum, the powder feeding roller and the developing roller are arranged in parallel; the first driving piece comprises a driving force receiving head and a driving gear which are coaxially arranged; a powder feeding gear is arranged at the axial end of the powder feeding roller, a developing gear is arranged at the axial end of the developing roller, the developing gear is meshed with the driving gear, and the powder feeding gear is in driving connection with the driving gear; the rotating speed of the developing gear is different from that of the powder feeding gear. According to the processing box, the rotation stability of the developing roller can be ensured, and meanwhile, the powder feeding roller can stably convey carbon powder to the developing roller.

Description

Technical Field

[0001] The utility model relates to the field of electronic photographic imaging, in particular to a processing box. Background Art

[0002] An electrophotographic imaging device is a device that uses the principle of electrophotography to form an image on a printing medium such as paper, including a printer and a processing box that is detachably installed in the printer.

[0003] An existing processing box includes a developer box and a drum box connected to each other. The coupling on the developer box receives the rotational driving force applied by the drive head in the printer. The coupling is connected to the powder feeding roller and drives the powder feeding roller to rotate, and the rotational driving force is transmitted to each rotating component, such as the developer roller, stirring frame and other components, through a gear system.

[0004] Since the developing roller is a key part that contacts the photosensitive drum to realize powder supply and development, the rotation torque of the developing roller and the stability of the transmission directly affect the powder supply of the developing roller. Since the existing transmission is transmitted from the driving head to the powder feeding roller and then to the developing roller through the gear system, the torque of the developing roller is often too large. The graded transmission affects the reliability and stability of the developing roller's rotation. The uneven force on the surface of the developing roller affects the uniformity and stability of the powder feeding of the developing roller to the photosensitive drum, which leads to the reduction of the quality of the latent image and image formation. In addition, the existing driving head is directly fixed to the powder feeding roller, so the rotation speed of the powder feeding roller cannot be changed. Since the function of the powder feeding roller is to transfer carbon powder to the developing roller, when the speed of the powder feeding roller does not match that of the developing roller, for example, when the speeds of the two are the same, the powder feeding roller cannot stably transfer carbon powder to the developing roller. Utility Model Content

[0005] The utility model aims to provide a processing box which can ensure the rotation stability of a developing roller and ensure that a powder feeding roller can stably convey carbon powder to the developing roller.

[0006] To achieve the above-mentioned purpose, the utility model provides a processing box, including a developing box and a drum box; the developing box includes a powder bin, a developing roller, a powder feeding roller and a first driving member, a accommodating chamber is provided in the powder bin, a powder outlet is provided at the top of the accommodating chamber, the developing roller is rotatably installed at the powder outlet, the powder feeding roller is located in the accommodating chamber and is adjacent to the developing roller, and the first driving member drives the developing roller and the powder feeding roller to rotate; the drum box includes a waste powder bin, a photosensitive drum and a second driving member, the photosensitive drum is rotatably installed in the waste powder bin, the second driving member is arranged at the first end of the processing box and drives the photosensitive drum to rotate, and the photosensitive drum, the powder feeding roller and the developing roller are arranged in parallel; the first driving member includes a driving force receiving head and a driving gear arranged coaxially; a powder feeding gear is provided at the axial end of the powder feeding roller, and a developing gear is provided at the axial end of the developing roller, the developing gear is meshed with the driving gear, and the powder feeding gear is drivingly connected to the driving gear; the rotation speed of the developing gear is different from the rotation speed of the powder feeding gear.

[0007] As can be seen from the above scheme, the driving force received by the driving force receiving head can be directly transmitted to the developing roller through the driving gear and the developing gear, avoiding the prior art that the torque on the developing roller is too large after being transmitted from the driving head to the powder feeding roller, and then transmitted to the developing roller through the gear system, and the graded transmission affects the reliability and stability of the rotation of the developing roller. Since the developing gear of the utility model is directly engaged with the driving gear, the reliability and stability of the rotation of the developing roller can be guaranteed, thereby ensuring the printing quality. In addition, by making the rotation speed of the developing gear different from the rotation speed of the powder feeding gear, there is a speed difference between the two, which can ensure that the powder feeding roller stably transports toner to the developing roller. At the same time, in the utility model, the powder feeding roller is connected to the driving gear through the powder feeding gear, and the transmission ratio of the powder feeding gear and the driving gear can be adjusted to achieve the adjustment of the rotation speed of the powder feeding roller, ensuring that the powder feeding roller can stably transport toner to the developing roller.

[0008] A preferred solution is that the driving force receiving head and the driving gear are located on the same side of the processing box.

[0009] A further solution is that the developing gear and the driving gear are both located at the first end of the processing box; the powder feeding gear is located at the second end of the processing box; a transfer gear is also provided at the end of the developing roller away from the developing gear, and the transfer gear is meshed with the powder feeding gear.

[0010] It can be seen that the powder feeding gear transmits driving force to it through the developing roller and the developing gear, thereby driving the powder feeding roller to rotate.

[0011] A further solution is that the developing box also includes a stirring frame, which is rotatably arranged in the accommodating chamber, and a stirring gear is arranged at the end of the stirring frame; an intermediate gear group is also arranged at the second end of the processing box, and the stirring gear is driven and connected to the transmission gear through the intermediate gear group.

[0012] It can be seen that the setting of the stirring frame can realize stable conveying of carbon powder toward the powder feeding roller, further improving the stability of powder feeding. In addition, the driving force is transmitted to the stirring frame through the intermediate gear set, thereby driving the stirring frame to move stably.

[0013] A preferred solution is that the powder feeding gear, the developing gear and the driving gear are all located at the first end of the processing box; the powder feeding gear and the developing gear are both meshed with the driving gear, and the powder feeding gear and the developing gear are arranged along the axial direction of the driving gear.

[0014] It can be seen that by arranging the gears at both ends of the processing box, the width dimension of the processing box can be reduced, and the box body can be miniaturized. At the same time, the layout has greater freedom and can use space more reasonably.

[0015] A further solution is that the developing box also includes a stirring frame, which is rotatably arranged in the accommodating chamber, and a stirring gear is arranged at the end of the stirring frame; a transmission gear and an intermediate gear are also arranged at the second end of the processing box; the transmission gear is arranged at the end of the powder feeding roller, and the stirring gear is drivingly connected to the transmission gear through the intermediate gear.

[0016] A preferred solution is that the driving force receiving head and the driving gear are respectively located on both sides of the processing box; a transmission rod is also provided in the powder bin, the transmission rod is parallel to the developing roller, the driving force receiving head and the driving gear are respectively arranged at both ends of the transmission rod and are both coaxially arranged with the transmission rod; the developing gear and the powder feeding gear are both meshed with the driving gear, and the developing gear and the powder feeding gear are arranged along the axial direction of the driving gear.

[0017] It can be seen that the gear train can also be arranged at an end away from the driving force receiving head, and the driving force is transmitted through the transmission rod. The transmission rod is a smooth rod, which will not be subject to the resistance of carbon powder, and therefore will not affect the transmission of the driving force.

[0018] A further solution is that the developing box also includes a stirring frame, which is rotatably arranged in the accommodating chamber, and a stirring gear is arranged at the end of the stirring frame; an intermediate gear group is also arranged at the second end of the processing box; the stirring gear is driven and connected to the powder feeding gear through the intermediate gear group.

[0019] A preferred solution is that the rotation speed of the developing gear is greater than the rotation speed of the powder feeding gear.

[0020] It can be seen from this that the rotation speed of the powder feeding roller is lower, so that the powder feeding roller stirs the carbon powder less, and the friction between the carbon powders will also be reduced, thereby reducing the heat generated by the carbon powder due to friction, preventing the carbon powder from overheating and affecting the carbon powder quality.

[0021] A preferred solution is that the rotation speed of the developing gear is less than the rotation speed of the powder feeding gear.

[0022] It can be seen from this that the rotation speed of the powder feeding roller is greater than the rotation speed of the developing roller. In this way, the powder feeding roller can convey more toner to the developing roller, thereby ensuring that there is enough toner on the developing roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the first embodiment of the imaging device of the utility model.

[0024] Figure 2 It is a structural diagram of the first embodiment of the processing box of the utility model.

[0025] Figure 3 It is a structural diagram of a rotating member, a first driving member and a gear system in the first embodiment of a processing box of the utility model.

[0026] Figure 4 It is a structural diagram of the gear train at the second end of the first embodiment of the processing box of the utility model.

[0027] Figure 5 It is a cross-sectional view of the first embodiment of the processing box of the utility model.

[0028] Figure 6 It is a structural diagram of a developing box in the second embodiment of a processing box of the utility model.

[0029] Figure 7 It is a structural diagram of the gear train at the first end of the second embodiment of the processing box of the utility model.

[0030] Figure 8 It is a structural diagram of the gear train at the second end of the second embodiment of the processing box of the utility model.

[0031] Fig. 9 It is a structural diagram of the gear train at the first end of the third embodiment of the processing box of the utility model.

[0032] Fig.10 It is a structural diagram of the gear train at the second end of the third embodiment of the processing box of the utility model.

[0033] Fig.11 It is a sectional view of a developing box in the third embodiment of the processing box of the utility model.

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0035] Processing box and processing box first embodiment:

[0036] See also Figures 1 to 5The imaging device of this embodiment includes a cartridge compartment and a process cartridge 1 detachably mounted in the cartridge compartment. A first transmission head (not shown), a second transmission head (not shown), a driving mechanism (not shown) and a push-and-release mechanism 10 are arranged in the cartridge compartment. The driving mechanism drives the first transmission head and the second transmission head to rotate simultaneously. The push-and-release mechanism 10 is located below the process cartridge 1 and can apply a thrust F to the force-bearing protrusion 6 on the process cartridge 1 in a horizontal direction.

[0037] The processing box 1 includes a developing box 2 and a drum box 3. The developing box 2 includes a powder bin 21 and a developing roller 22, a powder feeding roller 23 and a stirring frame 24 rotatably supported on the powder bin 21. A force-bearing protrusion 6 is provided at the bottom of one end of the powder bin 21. A accommodating chamber 210 is provided in the powder bin 21. A powder outlet 211 is provided at the top of the accommodating chamber 210. The developing roller 22 is rotatably installed at the powder outlet 211. The powder feeding roller 23 and the stirring frame 24 are both located in the accommodating chamber 210. The powder feeding roller 23 is closer to the developing roller 22 than the stirring frame 24 and is adjacent to the developing roller 22. The developing box 2 also includes a first driving member 25. The first driving member 25 can engage with the first transmission head and drive rotating members such as the developing roller 22, the powder feeding roller 23 and the stirring frame 24 to rotate.

[0038] The drum cartridge 3 includes a waste toner bin 31 , a photosensitive drum 4 rotatably mounted in the waste toner bin 31 , and a cleaning component (not shown) mounted on the waste toner bin 31 . The photosensitive drum 4 , the powder feeding roller 23 , and the developing roller 22 are arranged in parallel.

[0039] The two ends of the cleaning component are supported on the waste powder bin 31, and the cleaning component abuts on the photosensitive drum 4, and is used to clean the residual powder on the photosensitive drum 4. The top of the end of the waste powder bin 31 away from the force-bearing protrusion 6 is provided with an elastic member such as a spring (not shown), the first end of the spring abuts on the waste powder bin 31, and the second end of the spring abuts on the powder bin 21. The position where the powder bin 21 and the waste powder bin 31 are hinged is located between the force-bearing protrusion 6 and the spring in the height direction of the processing box 1. After the push-and-release mechanism 10 in the imaging device applies a force F to the force-bearing protrusion 6, the powder bin 21 rotates relative to the waste powder bin 31, the developing roller 22 separates from the photosensitive drum 4, and the developing roller 22 moves to the cleaning position relative to the photosensitive drum 4. At this time, the spring is in a compressed state. After the push-and-release mechanism 10 moves in the opposite direction and cancels the force on the force-bearing protrusion 6, the spring pushes the powder bin 21 to rotate under the action of its own elastic restoring force, the developing roller 22 contacts the photosensitive drum 4, and the developing roller 22 moves to the imaging position relative to the photosensitive drum 4. The drum cartridge 3 further includes a second driving member 32 , which is disposed at a first end of the process cartridge 1 and drives the photosensitive drum 4 to rotate.

[0040] See also Figure 3 and Figure 4The first driving member 25 includes a driving force receiving head 251 and a driving gear 252 which are coaxially arranged. The driving force receiving head 251 and the driving gear 252 are located on the same side of the processing box 1. The axial end of the powder feeding roller 23 is provided with a powder feeding gear 26, the end of the stirring frame 24 is provided with a stirring gear 29, and the two axial ends of the developing roller 22 are respectively provided with a developing gear 27 and a transfer gear 28.

[0041] The developing gear 27 and the driving gear 252 are both located at the first end of the process box 1, and the powder feeding gear 26, the transmission gear 28 and the stirring gear 2 are all located at the second end of the process box 1. The developing gear 27 is meshed with the driving gear 252, and the powder feeding gear 26 is drivingly connected to the driving gear 252. Specifically, the transmission gear 28 includes a first gear portion 281 and a second gear portion 282 arranged along the axial direction, the diameter of the first gear portion 281 is greater than the diameter of the second gear portion 282, and the powder feeding gear 26 is meshed with the first gear portion 281. The second end of the process box 1 is also provided with an intermediate gear set 7, and the stirring gear 29 is drivingly connected to the transmission gear 28 through the intermediate gear set 7. Specifically, the intermediate gear set 7 includes a first intermediate gear 71 and a second intermediate gear 72, the first intermediate gear 71 is meshed with the second gear portion 282 of the transmission gear 28, the first intermediate gear 71 and the powder feeding gear 26 are arranged along the axial direction of the transmission gear 28, and the stirring gear 29 is drivingly connected to the first intermediate gear 71 through the second intermediate gear 72.

[0042] The rotation speed of the developing gear 27 is different from the rotation speed of the powder feeding gear 26. In the present embodiment, the rotation speed of the developing gear 27 is greater than the rotation speed of the powder feeding gear 26. By setting the rotation speed of the powder feeding roller 23 to be smaller, the powder feeding roller 23 stirs the carbon powder less, and the friction between the carbon powders is also reduced, thereby reducing the heat generated by the carbon powder due to friction, and preventing the carbon powder from overheating and affecting the carbon powder quality. In other embodiments, the rotation speed of the developing gear 27 can also be less than the rotation speed of the powder feeding gear 26, so that the rotation speed of the powder feeding roller 23 is greater than the rotation speed of the developing roller 22, so that the powder feeding roller 23 can transfer more carbon powder to the developing roller 22, thereby ensuring that there is enough carbon powder on the developing roller 22. The ratio of the rotation speed of the developing gear 27 to the rotation speed of the powder feeding gear 26 can be achieved by the transmission ratio of the developing gear 27 to the powder feeding gear 26.

[0043] As can be seen from the above, by directly meshing the developing gear with the driving gear, the driving force received by the driving force receiving head can be directly transmitted to the developing roller through the driving gear and the developing gear, avoiding the prior art that the torque on the developing roller is too large after being transmitted from the driving head to the powder feeding roller, and then transmitted to the developing roller through the gear system, and the graded transmission affects the reliability and stability of the rotation of the developing roller. Since the developing gear of the utility model is directly meshed with the driving gear, the reliability and stability of the rotation of the developing roller can be guaranteed, thereby ensuring the printing quality. In addition, by making the rotation speed of the developing gear different from the rotation speed of the powder feeding gear, there is a speed difference between the two, which can ensure that the powder feeding roller stably transports toner to the developing roller. At the same time, in the utility model, the powder feeding roller is connected to the driving gear through the powder feeding gear, and the transmission ratio of the powder feeding gear and the driving gear can be adjusted to achieve the adjustment of the rotation speed of the powder feeding roller, ensuring that the powder feeding roller can stably transport toner to the developing roller.

[0044] Processing box second embodiment:

[0045] As an explanation of the second embodiment of the processing box of the utility model, only the differences from the first embodiment of the processing box described above are explained below.

[0046] See also Figures 6 to 8 In this embodiment, the powder feeding gear 36, the developing gear 37 and the driving gear 352 are all located at the first end of the process box. The powder feeding gear 36 and the developing gear 37 are both meshed with the driving gear 352, and the powder feeding gear 36 and the developing gear 37 are arranged along the axial direction of the driving gear 352.

[0047] The second end of the processing box is also provided with a transmission gear 38 and an intermediate gear 30 . The transmission gear 38 is arranged at the end of the powder feeding roller 33 , and the stirring gear 39 is drivingly connected to the transmission gear 38 through the intermediate gear 30 .

[0048] It can be seen that by arranging the gears at both ends of the processing box, the width dimension of the processing box can be reduced, and the box body can be miniaturized. At the same time, the layout has greater freedom and can use space more reasonably.

[0049] Processing box third embodiment:

[0050] As an explanation of the third embodiment of the processing box of the utility model, only the differences from the first embodiment of the processing box mentioned above are explained below.

[0051] See also Figures 9 to 11In this embodiment, the driving force receiving head 451 and the driving gear 452 are respectively located on both sides of the processing box. A transmission rod 420 is also provided in the powder bin 421. The transmission rod 420 is parallel to the developing roller 42, and the diameters of the developing roller 42 and the powder feeding roller 43 are larger than the transmission rod 420. The driving force receiving head 451 and the driving gear 452 are respectively provided at both ends of the transmission rod 420 and are both coaxially arranged with the transmission rod 420. The developing gear 47 and the powder feeding gear 46 are both meshed with the driving gear 452, and the developing gear 47 and the powder feeding gear 46 are arranged along the axial direction of the driving gear 452.

[0052] The second end of the process box is also provided with an intermediate gear set 470, and the stirring gear 49 is drivingly connected to the powder feeding gear 46 through the intermediate gear set 470. Specifically, the intermediate gear set 470 includes a first intermediate gear 471 and a second intermediate gear 472, the powder feeding gear 46 and the second intermediate gear 472 are respectively located on both sides of the first intermediate gear 471 and are both meshed with the first intermediate gear 471, and the stirring gear 49 is drivingly connected to the first intermediate gear 471 through the second intermediate gear 472.

[0053] It can be seen that the gear train can also be arranged at an end away from the driving force receiving head, and the driving force is transmitted through the transmission rod. The transmission rod is a smooth rod, which will not be subject to the resistance of carbon powder, and therefore will not affect the transmission of the driving force.

[0054] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are 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. Processing box, including developing box and drum box; The developing box comprises a powder bin, a developing roller, a powder feeding roller and a first driving member, wherein a containing chamber is provided in the powder bin, a powder outlet is provided at the top of the containing chamber, the developing roller is rotatably mounted at the powder outlet, the powder feeding roller is located in the containing chamber and adjacent to the developing roller, and the first driving member drives the developing roller and the powder feeding roller to rotate; The drum box comprises a waste toner bin, a photosensitive drum and a second driving member, wherein the photosensitive drum is rotatably mounted in the waste toner bin, the second driving member is disposed at the first end of the process box and drives the photosensitive drum to rotate, and the photosensitive drum, the powder feeding roller and the developing roller are disposed in parallel; Features: The first driving member includes a driving force receiving head and a driving gear arranged coaxially; The axial end of the powder feeding roller is provided with a powder feeding gear, the axial end of the developing roller is provided with a developing gear, the developing gear is meshed with the driving gear, and the powder feeding gear is drivingly connected with the driving gear; The rotation speed of the developing gear is different from the rotation speed of the powder feeding gear.

2. The process cartridge according to claim 1, wherein: The driving force receiving head and the driving gear are located on the same side of the process box.

3. The process cartridge according to claim 2, wherein: The developing gear and the driving gear are both located at a first end of the process cartridge; The powder feeding gear is located at the second end of the processing box; A transfer gear is also provided at one end of the developing roller away from the developing gear, and the transfer gear is meshed with the powder feeding gear.

4. The process cartridge according to claim 3, wherein: The developing box further comprises a stirring frame, which is rotatably arranged in the accommodating chamber, and a stirring gear is arranged at an end of the stirring frame; The second end of the processing box is also provided with an intermediate gear set, and the stirring gear is drivingly connected with the transmission gear through the intermediate gear set.

5. The process cartridge according to claim 2, wherein: The powder feeding gear, the developing gear and the driving gear are all located at the first end of the process box; The powder feeding gear and the developing gear are both meshed with the driving gear, and the powder feeding gear and the developing gear are arranged along the axial direction of the driving gear.

6. The process cartridge according to claim 5, wherein: The developing box further comprises a stirring frame, which is rotatably arranged in the accommodating chamber, and a stirring gear is arranged at an end of the stirring frame; The second end of the processing box is also provided with a transmission gear and an intermediate gear; The transmission gear is arranged at the end of the powder feeding roller, and the stirring gear is drivingly connected to the transmission gear through the intermediate gear.

7. The process cartridge according to claim 1, wherein: The driving force receiving head and the driving gear are respectively located on two sides of the processing box; A transmission rod is also arranged in the powder bin, the transmission rod is parallel to the developing roller, the driving force receiving head and the driving gear are respectively arranged at two ends of the transmission rod and are both arranged coaxially with the transmission rod; The developing gear and the powder feeding gear are both meshed with the driving gear, and the developing gear and the powder feeding gear are arranged along the axial direction of the driving gear.

8. The process cartridge according to claim 7, wherein: The developing box further comprises a stirring frame, which is rotatably arranged in the accommodating chamber, and a stirring gear is arranged at an end of the stirring frame; The second end of the processing box is also provided with an intermediate gear set; The stirring gear is drivingly connected to the powder feeding gear through the intermediate gear set.

9. The process cartridge according to any one of claims 1 to 8, characterized in that: The rotation speed of the developing gear is greater than the rotation speed of the powder feeding gear.

10. The process cartridge according to any one of claims 1 to 8, characterized in that: The rotation speed of the developing gear is lower than the rotation speed of the powder feeding gear.

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