Processing box

Abstract

The utility model discloses a processing box, which is detachably arranged in an image forming device and comprises a photosensitive unit, an image forming unit, a processing unit, a control unit and a processing unit, and is characterized in that the photosensitive unit comprises a photosensitive frame and a photosensitive drum which is arranged in the photosensitive frame; the developing unit comprises a developing frame and a developing roller, the developing roller is mounted in the developing frame, and the developing frame is connected with the photosensitive frame; the conductive electrode is used for charging the photosensitive drum and the developing roller; the conductive electrode is in direct or indirect contact with the photosensitive drum or the developing roller for electric conduction, and the photosensitive drum is in contact with the developing roller for electric conduction, so that the conductive electrode is in conductive connection with the photosensitive drum and the developing roller. According to the processing box, the number of electrodes exposed on the processing box is reduced, the power-on state of the photosensitive drum and the developing roller can be met only by maintaining a single conductive electrode, and the risk that normal printing cannot be carried out due to damage of the conductive electrode is reduced.

Description

Technical Field

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

[0002] The processing box is an important component that is detachably installed in an image forming device (such as a printer) for imaging. In the prior art, the processing box has a photosensitive frame and a developing frame, and the photosensitive frame and the developing frame are respectively provided with a charging electrode and a developing electrode, so as to charge the photosensitive drum and the developing roller respectively, so as to perform normal printing. Therefore, in actual use, it is necessary to ensure that the charging electrode and the developing electrode can perform normal conductive work, but the charging electrode and the developing electrode are both exposed to the outside of the processing box. When one of the electrodes has abnormal conductivity, even if the other electrode is normally conductive, it will still affect the overall printing quality, and even prevent normal printing. Therefore, setting two electrodes for circuit conduction increases the risk of electrode damage and the cost of repairing electrode damage, thereby increasing the risk of damage to printing quality. Utility Model Content

[0003] The processing box of the utility model can effectively solve the problem in the prior art that the risk of damaging printing quality due to electrodes is increased.

[0004] According to one aspect of the utility model, there is provided a process cartridge which is detachably mounted in an image forming device, comprising:

[0005] A photosensitive unit, comprising a photosensitive frame and a photosensitive drum, wherein the photosensitive drum is installed in the photosensitive frame;

[0006] A developing unit, comprising a developing frame and a developing roller, wherein the developing roller is installed in the developing frame, and the developing frame is connected to the photosensitive frame;

[0007] and a conductive electrode for charging the photosensitive drum and the developer roller;

[0008] The photosensitive drum is coaxially provided with a rotatable first conductor, and the developing roller is coaxially provided with a rotatable second conductor, and the first conductor and the second conductor are in contact and conduct electricity so that the photosensitive drum and the developing roller are conductively connected. Thus, the first conductor and the second conductor are used as carriers for contact and conduction.

[0009] In some embodiments, the first conductor is configured as a photosensitive gear, and the second conductor is configured as a developing gear, and the photosensitive gear and the developing gear are meshed with each other to form contact conduction. Thus, the effectiveness of conduction can be improved by meshing the gears to achieve contact conduction.

[0010] In some embodiments, the conductive electrode is disposed on the photosensitive frame and is directly or indirectly in contact with the photosensitive drum for electrical conduction; or, the conductive electrode is disposed on the developing frame and is in contact with the developing roller for electrical conduction. Thus, the position of the conductive electrode can be selected according to actual setting requirements.

[0011] In some embodiments, the process box has a driving end in a first direction, the axial directions of the developing roller and the photosensitive drum are parallel to the first direction, and the photosensitive gear and the developing gear are arranged at the driving end.

[0012] In some embodiments, the photosensitive drum has a power receiving part, the power receiving part drives the photosensitive gear to rotate, and the photosensitive gear drives the developing roller to rotate by meshing with the developing gear. Therefore, when the developing roller and the photosensitive drum are driven, conductive contact is achieved, which effectively saves conductive space.

[0013] In some embodiments, the photosensitive frame is provided with a protrusion, the conductive electrode is disposed on the protrusion and a portion of the conductive electrode is exposed on the protrusion, thereby supporting the conductive electrode through the protrusion so as to receive power from the image forming device.

[0014] In some embodiments, the photosensitive unit further comprises an elastic member and a charging roller, the charging roller abuts against the photosensitive drum and the elastic member, and the conductive electrode is conductively connected to the photosensitive drum through the elastic member and the charging roller, so that the conductive electrode transmits power to the photosensitive drum through the elastic member and the charging roller.

[0015] In some embodiments, the conductive electrode has a conductive portion, and the conductive portion contacts the elastic member for electrical conduction.

[0016] In some embodiments, the photosensitive frame is provided with a notch, and the conductive part passes through the notch and abuts against the elastic member for conduction.

[0017] Compared with the prior art, the processing box of the utility model has the following beneficial effects:

[0018] The processing box of the present application is provided with a conductive electrode for receiving power from the image forming device. The conductive electrode can be in contact with the photosensitive drum or the developing roller for conduction, and the photosensitive drum and the developing roller can be in contact with each other for conduction. The first conductor is in contact with the second conductor for conduction, so that the photosensitive drum and the developing roller are conductively connected. Therefore, by providing a single conductive electrode, it is possible to charge the photosensitive drum and the developing roller, reducing the number of electrodes exposed on the processing box. Only a single conductive electrode needs to be maintained to meet the power-on state of the photosensitive drum and the developing roller, reducing the risk of normal printing due to damage to the conductive electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the processing box of the utility model;

[0020] Figure 2 This is a structural disassembly diagram of the processing box of the utility model;

[0021] Figure 3 This is a schematic diagram of the developing unit of the present invention with the drive side end cover omitted;

[0022] Figure 4 It is a structural schematic diagram of the drum unit of the utility model;

[0023] Figure 5 It is a schematic diagram of the driving end of the processing box in the utility model;

[0024] Figure 6 This is a schematic diagram of the driving end of the processing box in the utility model after omitting the driving side end cover and the photosensitive frame.

[0025] In the figure: 100-processing box, 101-driving end, 102-non-driving end, 1-developing unit, 11-developing frame, 111-powder bin, 12-developing roller, 13-developing gear, 14-idle wheel, 15-driving side end cover, 16-non-driving side end cover, 2-drum unit, 21-photosensitive frame, 211-waste powder bin, 212-slot, 213-protrusion, 22-photosensitive drum, 221-power receiving part, 222-photosensitive gear, 23-elastic member, 24-charging roller, 25-conductive electrode, 251-conductive part. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] The utility model relates to a processing box which can be detachably installed in an image forming device. The image forming device includes, for example, an electronic photographic copier, an electronic photographic printer (LED printer, laser printer, etc.), an electronic photographic printer type fax machine, etc.

[0029] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0030] Figure 1 The process box 100 according to one embodiment of the present invention is schematically shown. For the convenience of description, the length direction of the process box 100 is the X-axis direction, the first direction is the +X-axis direction, the opposite direction of the first direction is the -X-axis direction, the width direction of the process box 100 is the Y-axis direction, including the +Y-axis direction and the -Y-axis direction, and the height direction of the process box 100 is the Z-axis direction, including the +Z-axis direction and the -Z-axis direction. The three axis directions are mutually orthogonal. The process box 100 has a driving end 101 in the +X-axis direction for receiving power from the image forming device, and one end in the -X-axis direction is a non-driving end 102, such as Figure 2 As shown, the process cartridge 100 includes a developing unit 1 and a drum unit 2 .

[0031] like Figure 2 and Figure 3 As shown, the developing unit 1 includes a developing frame 11, a developing roller 12, a developing gear 13, an idler wheel 14, a driving side end cover 15 and a non-driving side end cover 16. The developing frame 11 is a roughly rectangular structure, and has a powder bin 111 inside for accommodating carbon powder. The powder bin 111 is also equipped with a stirring frame (not shown) for stirring the carbon powder in the powder bin 111 to prevent agglomeration. The developing roller 12 is rotatably mounted at the powder outlet of the developing frame 11, and the axial direction of the developing roller 12 is parallel to the X-axis direction. The developing gear 13 is coaxially arranged on the +X-axis side of the developing roller 12, and can directly receive the power output from the image forming device; the idler wheel 14 is rotatably arranged on the +X-axis side of the developing frame 11. The developing roller 12 is rotatably supported on the driving side end cover 15, and the non-driving side end cover 16 is disposed on the non-driving end 102, and is detachably connected to the -X axis side of the developing frame 11.

[0032] like Figure 2 and Figure 4As shown, the drum unit 2 includes a photosensitive frame 21, a photosensitive drum 22, an elastic member 23 and a charging roller 24. The photosensitive frame 21 is generally an open shell structure, and the photosensitive frame 21 has a waste toner bin 211 for storing waste toner from the photosensitive drum 22. The photosensitive frame 21 can be connected to the drive side end cover 15, and the drive side end cover 15 enables the photosensitive frame 21 to be connected to the developing unit 1. In the X-axis direction, the photosensitive frame 21 can cover part of the drive side end cover 15. The photosensitive drum 22 is rotatably installed in the photosensitive frame 21. The +X axis side of the photosensitive drum 22 has a power receiving portion 221 for receiving power from the image forming device so that the photosensitive drum 22 can be driven to rotate. The axial directions of the photosensitive drum 22 and the charging roller 24 are parallel to the X axis direction. The charging roller 24 abuts against the photosensitive drum 22 for charging the photosensitive drum 22. Both ends of the charging roller 24 in the X axis direction abut against the elastic member 23. The elastic member 23 is preferably a spring. The elastic member 23 abuts against the photosensitive frame 21 for providing pressure for the charging roller 24 to abut against the photosensitive drum 22 and has a conductive effect. A photosensitive gear 222 is coaxially arranged on the +X axis side of the photosensitive drum 22. The photosensitive gear 222 can be driven to rotate through the power receiving portion 221. Among them, a conductive electrode 25 is also provided on the photosensitive frame 21. The charging roller 24 conducts electricity through the conductive electrode 25 so as to transfer electricity to the photosensitive drum 22 and the developing roller 12. When the processing box 100 is installed in the image forming device, the power output shaft (not shown) of the image forming device is connected to the power receiving part 221, and at the same time, the photosensitive gear 222 and the developing gear 13 are engaged with each other to transmit the power received by the power receiving part 221 to the developing roller 12, so that the photosensitive drum 22 and the developing roller 12 rotate relative to each other to form a potential difference to realize electrostatic imaging.

[0033] like Figure 5 As shown, in order to reduce the risk of damage to printing quality due to electrodes, the present application adopts a conductive electrode 25 for receiving power from the image forming device, and directly or indirectly transmits the power to the photosensitive drum 22 and the developing roller 12, so as to achieve normal charging of the photosensitive drum 22 and the developing roller 12. In this embodiment, the photosensitive drum 22 and the developing roller 12 are arranged to be in contact with each other for conductivity, so as to omit the electrode in the developing roller 12, thereby avoiding the situation where the electrode in the developing roller 12 is damaged and affects normal printing.

[0034] like Figure 6As shown, specifically, the conductive electrode 25 is arranged on the +X axis side of the photosensitive frame 21, exposed on the driving end 101, and can receive power from the image forming device. One end of the conductive electrode 25 abuts against the elastic member 23 so as to transmit power to the photosensitive drum 22 through the elastic member 23 and the charging roller 24. In order to facilitate the contact and conduction between the photosensitive drum 22 and the developing roller 12, gear meshing is adopted in this embodiment to realize contact and conduction. Among them, the photosensitive drum 22 is coaxially provided with a first conductor, which is configured as a photosensitive gear 222, and the developing roller 12 is coaxially provided with a second conductor, which is configured as a developing gear 13. The first conductor and the second conductor can be gear-engaged, that is, the photosensitive gear 222 and the developing gear 13 can be gear-engaged with each other, so that the photosensitive drum 22 can transmit power to the developing roller 12, so that when the power of the image forming device is transmitted to the photosensitive drum 22, the developing roller 12 can also complete normal charging. In other embodiments, the developing gear 13 and the photosensitive gear 222 may only function as power transmission gears, and the first conductor and the second conductor may be configured as other conductive metal components as conductive carriers. Finally, the conductive electrode 25 may be conductively connected to the photosensitive drum 22 and the developing roller 12 through contact between the first conductor and the second conductor.

[0035] Further, such as Figure 5 As shown, the +X axis side of the photosensitive frame 21 is provided with a notch 212 and a protrusion 213, the notch 212 is an opening structure that penetrates the side bearing of the photosensitive frame 21, the protrusion 213 is a protruding structure, the conductive electrode 25 is provided on the protrusion 213, and a clamping structure can be adopted so that the conductive electrode 25 can be supported on the protrusion 213, and the other end of the conductive electrode 25 extends through the notch 212 to the elastic member 23 and abuts against the elastic member 23 to achieve conduction. Specifically, the conductive electrode 25 is a bent piece of metal material, and the conductive electrode 25 has a conductive part 251, a part of the conductive part 251 is exposed and attached to the photosensitive frame 21, and the bent part of the conductive part 251 extends into the photosensitive frame 21 through the notch 212 and abuts against the elastic member 23.

[0036] It can be known that the conductive process of the processing box 100 of the present application is to receive the power of the image forming device through the conductive electrode 25 and transmit it to the elastic member 23 and the charging roller 24 through the conductive part 251. The charging roller 24 is charged by contacting the surface of the photosensitive drum 22. At this time, the photosensitive drum 22 with power charges the photosensitive gear 222 coaxially arranged therewith, and then the photosensitive gear 222 engages with the developing gear 13 to transmit the power to the developing roller 12, so as to realize the conductive connection between the conductive electrode 25 and the photosensitive drum 22 and the developing roller 12. Therefore, the processing box 100 can realize the normal electrostatic latent image to complete the printing work when the single conductive electrode 25 receives power, avoiding the situation that the developing roller 12 and the photosensitive drum 22 need to be provided with electrodes respectively, and only needs to maintain a single conductive electrode 25, thereby saving the cost of maintaining the electrode and reducing the risk of abnormal operation of the processing box 100 due to electrode damage. Moreover, the effectiveness of conduction is improved by contacting and conducting through gear meshing. Because the developing roller 12 and the photosensitive drum 22 need to rotate continuously, the developing roller 12 and the photosensitive drum 22 can be normally energized when they are driven. At the same time, the conductive gears are arranged in the processing box 100 to avoid being exposed outside the processing box 100, thereby effectively protecting the gears from damage caused by external interference. Compared with the method of arranging a conductive steel sheet on the outer surface of the processing box 100 to transmit electricity, this embodiment can effectively improve the service life of the processing box 100.

[0037] In some embodiments, the conductive electrode 25 is arranged in the developing unit 1, specifically on the driving side end cover 15, and the conductive electrode 25 can directly contact and conduct electricity with the developing roller 12. The developing roller 12 is engaged with the photosensitive gear 222 through the developing gear 13 to achieve contact conduction, so that the electricity can be transmitted to the photosensitive drum 22. The conductive process is that the conductive electrode 25 receives electricity from the image forming device and transmits it to the developing roller 12 and the photosensitive drum 22, completing the conductive connection with the developing roller 12 and the photosensitive drum 22. Similarly, a single conductive electrode 25 is used to realize the charging process of the developing roller 12 and the photosensitive drum 22, which can achieve the same effect as the above-mentioned embodiment.

[0038] In some embodiments, the developing gear 13 and the photosensitive gear 222 only serve as power transmission gears, and the developing roller 12 and the photosensitive drum 22 achieve contact conduction through a conductive sheet (not shown). For example, a conductive sheet is arranged between the shaft ends (non-drive side) on the -X-axis side of the developing roller 12 and the photosensitive drum 22, and the conductive sheets are in contact with the shaft ends of the developing roller 12 and the photosensitive drum 22 for conduction, respectively, that is, they serve as a conductive medium for the developing roller 12 and the photosensitive drum 22. When the conductive electrode 25 receives electricity, it is transferred to the photosensitive drum 22 through the elastic member 23 and the charging roller 24, and the photosensitive drum 22 then transfers the electricity to the developing roller 12 through the conductive sheet, thereby realizing the charging process of the individual conductive electrode 25.

[0039] The above description is only a preferred embodiment of the present invention. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. This does not limit the present invention in any form. Therefore, any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A process cartridge, detachably mounted in an image forming device, characterized in that: include: A photosensitive unit, comprising a photosensitive frame and a photosensitive drum, wherein the photosensitive drum is installed in the photosensitive frame; A developing unit, comprising a developing frame and a developing roller, wherein the developing roller is installed in the developing frame, and the developing frame is connected to the photosensitive frame; and a conductive electrode for charging the photosensitive drum and the developer roller; The invention is characterized in that the photosensitive drum is coaxially provided with a rotatable first conductor, the developing roller is coaxially provided with a rotatable second conductor, and the first conductor is in contact with the second conductor to conduct electricity so that the photosensitive drum is conductively connected with the developing roller.

2. The process cartridge according to claim 1, wherein: The first conductor is configured as a photosensitive gear, and the second conductor is configured as a developing gear. The photosensitive gear and the developing gear are meshed with each other to form contact conduction.

3. The process cartridge according to claim 1, wherein: The conductive electrode is disposed on the photosensitive frame and is in direct or indirect contact with the photosensitive drum for electrical conduction; or, the conductive electrode is disposed on the developing frame and is in contact with the developing roller for electrical conduction.

4. The process cartridge according to claim 2, wherein: The process box has a driving end in a first direction, the axial directions of the developing roller and the photosensitive drum are parallel to the first direction, and the photosensitive gear and the developing gear are arranged at the driving end.

5. The process cartridge according to claim 4, wherein: The photosensitive drum has a power receiving portion, and the power receiving portion drives the photosensitive gear to rotate. The photosensitive gear drives the developing roller to rotate by meshing with the developing gear.

6. The process cartridge according to claim 1, wherein: The photosensitive frame is provided with a protrusion, the conductive electrode is disposed on the protrusion and a portion of the conductive electrode is exposed on the protrusion.

7. The process cartridge according to claim 1, wherein: The photosensitive unit further includes an elastic member and a charging roller, the charging roller abuts against the photosensitive drum and the elastic member, and the conductive electrode is conductively connected to the photosensitive drum through the elastic member and the charging roller.

8. The process cartridge according to claim 7, wherein: The conductive electrode has a conductive portion, and the conductive portion contacts the elastic member for electrical conduction.

9. The process cartridge according to claim 8, wherein: The photosensitive frame is provided with a notch, and the conductive part passes through the notch and abuts against the elastic member for electrical conduction.

Images