Processing box

Abstract

The utility model discloses a processing box, which is used for electrophotographic imaging equipment and comprises a box frame, a photosensitive drum, a developing roller and a charging roller, and the photosensitive drum, the developing roller and the charging roller are rotatably mounted on the box frame; one longitudinal end part of the processing box is a driving end, the driving end is provided with a connecting component for driving the photosensitive drum, the driving end is also provided with an electric contact, a conductor and a voltage reduction device which can be electrically connected with the electrophotographic imaging equipment, and the electric contact is electrically connected with the charging roller and is electrically connected with the developing roller through the conductor and the voltage reduction device; therefore, the electric contact is connected with the charging roller and is also connected with the developing roller through the voltage reduction device, so that only one electric contact is arranged on the processing box and is electrically connected with the electrophotographic imaging equipment, and stable electric connection can be realized.

Description

Technical Field

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

[0002] An electronic photographic imaging device is a device that uses the principle of electronic photography to form an image on a recording medium through processes such as charging, exposure, development, transfer, de-charge, cleaning, and fixing. In an electronic photographic imaging device, a processing box is a commonly used consumable, which generally has rotating components such as a photosensitive drum, a developing roller, and a charging roller. The developing roller transports the developer to the photosensitive drum by rotating, and the charging roller is used to evenly apply the charge to the surface of the photosensitive drum by rotating. The photosensitive drum forms an electrostatic latent image on its surface through rotation and exposure, and then forms a toner image through development. The development process is the transfer of charged toner to the exposed area on the photosensitive drum. It can be seen from this that the components such as the photosensitive drum, developing roller, and charging roller in the processing box need to rotate stably, and the charging roller and the developing roller need to be powered by electrodes. However, the voltages required for the charging roller and the developing roller are not the same.

[0003] There is a processing box, whose driving end is provided with a transmission mechanism, and the connecting member at the end of the photosensitive drum is used to connect with the driving head inside the driving member of the electronic photographic imaging device to receive the driving force, and the developing roller is driven to rotate by meshing the gear at the end with the gear part outside the driving member, and the driving force is transmitted to other rotating members through the transmission mechanism. That is, the driving member of the electronic photographic imaging device drives the photosensitive drum and the developing roller at the same time. In addition, two electrical contacts are also provided on both sides of the end to respectively connect electrically with the electronic photographic imaging device and supply power to the charging roller and the developing roller. In order to ensure that the photosensitive drum and the developing roller stably receive the driving force and the charging roller and the developing roller are electrically connected, the structure of the processing box is relatively complicated, and the electrical connection is unstable, and it is very easy to have a phenomenon that one electrical contact is connected to the electronic photographic imaging device while the other electrical contact is disconnected. Summary of the invention

[0004] In view of the problems existing in the prior art, the main purpose of the utility model is to provide a processing box that stably receives power.

[0005] In order to achieve the above-mentioned main purpose, the utility model provides a processing box for an electronic photographic imaging device, wherein the processing box includes a box frame, a photosensitive drum, a developing roller and a charging roller, and the photosensitive drum, the developing roller and the charging roller are rotatably mounted on the box frame; one longitudinal end of the processing box is a driving end, and the driving end is provided with a connecting member for driving the photosensitive drum, and the driving end is also provided with an electrical contact, a conductor and a voltage reduction device that can be electrically connected to the electronic photographic imaging device, the electrical contact is electrically connected to the charging roller, and is electrically connected to the developing roller through the conductor and the voltage reduction device.

[0006] It can be seen from the above technical solution that by setting an electrical contact to connect with both the charging roller and the developing roller through a voltage reducing device, only one electrical contact is required on the processing box to be electrically connected with the electronic photographic imaging device, thereby achieving a stable electrical connection.

[0007] Preferably, the process box further comprises an electrical connection piece, wherein the electrical connection piece is electrically connected to the charging roller and is electrically connected to the developing roller via the conductor and the voltage reducing device.

[0008] Preferably, the processing box further comprises an end cover located at the driving end, the end cover has a receiving groove facing outward, and the pressure reducing device is arranged in the receiving groove.

[0009] As can be seen from the above scheme, the pressure reducing device is arranged outside the end cover, so that when the processing box is working, the developer will not fall onto the pressure reducing device, and the pressure reducing device can work stably. The receiving groove can fix and protect the pressure reducing device to avoid damage due to impact and collision.

[0010] Preferably, the voltage reducing device is a voltage regulator tube, and the conductor is a wire.

[0011] It can be seen from the above scheme that the voltage-reducing device uses a voltage-stabilizing tube and the conductor uses a wire, which has a better effect.

[0012] Preferably, along the axial direction of the photosensitive drum, the connecting member is movable relative to the photosensitive drum; a biasing device is provided between the connecting member and the photosensitive drum body, and the biasing device applies an outward biasing force to the connecting member.

[0013] It can be seen from the above scheme that the connecting member can move axially relative to the photosensitive drum. When the processing box is installed on the electronic photographic imaging device, the connecting member is abutted and moved toward the inside of the photosensitive drum, and the gear portion of the driving member engages with the gear member. Then, under the action of the biasing device, the connecting member moves outward and cooperates with the driving head to transmit driving force to the photosensitive drum.

[0014] Preferably, the connecting member is movable relative to the photosensitive drum in a plane perpendicular to the axial direction of the photosensitive drum.

[0015] It can be seen from the above scheme that the connecting member can move perpendicularly to the longitudinal direction relative to the photosensitive drum. When the processing box is installed to the electronic photographic imaging device, if there is interference, the connecting member will slide laterally, and the gear part of the driving member will mesh with the gear member. Then, as the driving head rotates, the connecting member cooperates with the driving head to transmit the driving force to the photosensitive drum.

[0016] Preferably, the connecting member includes a driving force receiving portion and a connecting member, wherein the connecting member is arranged between the driving force receiving portion and the photosensitive drum; the connecting member can slide in a first direction relative to the photosensitive drum, and the first direction is perpendicular to the axial direction of the photosensitive drum; the driving force receiving portion can slide in a second direction relative to the connecting member, and the second direction is perpendicular to the axial direction of the photosensitive drum and the first direction.

[0017] Preferably, a groove or a protrusion is provided on the photosensitive drum, and a corresponding protrusion or groove is provided on one end of the connecting member; a groove or a protrusion is provided on the other end of the connecting member, and a corresponding protrusion or groove is provided on the driving force receiving portion.

[0018] Preferably, the processing box further comprises a gear member, wherein the gear member is connected to the end of the developing roller; the gear member can move relative to the developing roller in a plane perpendicular to the axial direction of the photosensitive drum.

[0019] Preferably, the gear member and the developing roller are not coaxial when rotating.

[0020] In order to more clearly illustrate the above-mentioned objectives, technical solutions and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0022] Figure 2 It is a cross-sectional structural schematic diagram of embodiment 1 of the utility model;

[0023] Figure 3 This is a schematic diagram of the end surface structure of Example 1 of the utility model after removing the protective cover;

[0024] Figure 4 It is a structural schematic diagram of the electrical connection part in Embodiment 1 of the present utility model;

[0025] Figure 5 It is a structural schematic diagram of the photosensitive drum and the connecting member in Embodiment 1 of the utility model;

[0026] Figure 6 It is a schematic diagram of the structure decomposition of the sleeve and the connecting member in Embodiment 1 of the utility model;

[0027] Figure 7 It is a schematic diagram of the structure of the sleeve in Embodiment 1 of the present utility model;

[0028] Figure 8 It is a structural schematic diagram of the connecting member in Embodiment 1 of the present utility model;

[0029] Fig. 9 It is a structural schematic diagram of Embodiment 2 of the present utility model;

[0030] Fig.10 It is a cross-sectional structural schematic diagram of embodiment 2 of the utility model;

[0031] Fig.11 This is a schematic diagram of the end surface structure of Example 2 of the utility model after removing the protective cover;

[0032] Fig.12 It is a schematic diagram of the structure of the electrical connection part in Embodiment 2 of the present utility model;

[0033] Fig.13 It is a structural schematic diagram of the photosensitive drum and the connecting member in Embodiment 2 of the present utility model;

[0034] Fig.14 It is a schematic diagram of the structure decomposition of the photosensitive drum and the connecting member in Embodiment 2 of the present utility model;

[0035] Fig.15 It is a structural schematic diagram of a connecting member in Embodiment 2 of the present utility model;

[0036] Fig.16 It is a structural schematic diagram of the driving force receiving part in Embodiment 2 of the present utility model;

[0037] Fig.17 It is a structural schematic diagram of Embodiment 3 of the present utility model;

[0038] Fig.18 It is a cross-sectional structural schematic diagram of embodiment 3 of the present utility model;

[0039] Fig.19 This is a schematic diagram of the end surface structure of Example 3 of the utility model after removing the protective cover;

[0040] Fig. 20 It is a structural schematic diagram of the electrical connection part in Embodiment 3 of the present utility model;

[0041] Fig.21 It is a schematic diagram of the structure decomposition of the developing roller and the gear member in Embodiment 3 of the present utility model;

[0042] Fig. 22 It is a structural schematic diagram of the connecting member in Embodiment 3 of the present utility model;

[0043] Fig.23 It is a schematic diagram of the structure of the gear part in Embodiment 3 of the present utility model;

[0044] Fig.24 It is a schematic diagram of the structure of the connecting piece in Example 4 of the utility model. DETAILED DESCRIPTION

[0045] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but it is easy for those skilled in the art to understand that the present invention can also be implemented in other ways different from those described herein. Therefore, other possible implementation methods that can be known by those skilled in the art based on the embodiments described in this application all belong to the protection scope of this application.

[0046] Example 1

[0047] like Figures 1 to 3 As shown, the process box 100 includes a box frame composed of a drum frame 11 and a developing frame 14, and rotating components such as a photosensitive drum 17, a developing roller 16 and a charging roller 18 are installed in the box frame, wherein the shafts of each component are arranged in parallel along the longitudinal direction of the process box 100. In addition to the photosensitive drum 17 and the charging roller 18, a cleaning device for cleaning the photosensitive drum 17 can also be installed on the drum frame 11, and a waste powder bin 111 for collecting waste powder can be provided in the drum frame 11, and a powder bin 141 for accommodating developer can be provided in the developing frame 14, and a stirring frame 15 for stirring developer can be provided in the powder bin 141. The transmission mechanism for driving components such as the photosensitive drum 17, the developing roller 16, and the stirring frame 15 is arranged at the driving end of the process box 100, and the end cover 12 is arranged outside the transmission mechanism for protecting the transmission mechanism, and a part of the gear member 161 is exposed from the end cover 12. A protective cover 13 is also installed on the box frame to protect the photosensitive drum 17. Before the process box 100 is installed in the electrophotographic imaging device, the protective cover 13 needs to be removed to expose the photosensitive drum 17.

[0048] At the driving end of the processing box 100, a gear member 161 is provided at the end of the developing roller 16, and a coupling member 171 is provided at the end of the photosensitive drum 17, wherein the coupling member 171 is used to connect with the driving head inside the driving member of the electronic photographic imaging device, and the gear member 161 is used to mesh with the gear part outside the driving member to receive the driving force of driving the developing roller and the photosensitive drum from the driving member. An electrical connection piece 191 is also provided at the driving end of the processing box 100, and the part exposed from the box frame forms an electrical contact to be electrically connected to the electronic photographic imaging device. The electrical connection piece 191 is connected to the charging roller 18 and is connected to the developing roller 16 through a wire and a voltage regulator tube 192 (as a step-down device), wherein the voltage regulator tube 192 is provided in the receiving groove 121 facing the outside of the end cover 12.

[0049] The voltage regulator tube 192 is arranged outside the end cover 12, so that when the process box 100 is working, the developer will not fall onto the voltage regulator tube 192, and the voltage regulator tube 192 can work stably. The receiving groove 121 can fix and protect the voltage regulator tube 192 to prevent it from being damaged by impact and collision.

[0050] The electrical connection structure of the process box 100 is described below. Figure 4As shown, the electrical connection piece 191 extends into the cartridge frame and is connected to the bearing 181 at the end of the charging roller 18 through a push piece 193 having an arc-shaped opening, so as to be electrically connected to the charging roller 18. The voltage regulator tube 192 has the functions of reducing and stabilizing voltage, and wires 194 and 195 extend from its two ends, respectively, wherein the wire 194 is connected to the electrical connection piece 191, and the wire 195 is connected to the spring 196 at the end of the developing roller 16, so as to be electrically connected to the developing roller 16. When the process cartridge 100 is installed in the electrophotographic imaging device, the contact of the electrical connection piece 191 is connected to the electrophotographic imaging device to apply a certain voltage to the charging roller 18, and at the same time, the voltage after the voltage reduction is applied to the developing roller 16 through the voltage regulator tube 192. Therefore, voltage can be applied to the developing roller 16 and the charging roller 18 at the same time through one electrical contact, and the electrical contact between the process cartridge 100 and the electrophotographic imaging device is more stable.

[0051] In this embodiment, the gear member 161 at the end of the developing roller 16 does not move relative to the developing roller 16, while the coupling member 171 at the end of the photosensitive drum 17 can move axially relative to the photosensitive drum 17. Figures 5 to 8 The specific structures of the photosensitive drum 17 and the coupling member 171 are described.

[0052] like Figures 5 to 8 As shown, the end of the photosensitive drum 17 is provided with a sleeve 172 fixedly connected thereto, a connecting member 171 is provided inside the sleeve 172, and a spring 173 as a biasing device is provided therebetween, one end of the spring 173 abuts against the bottom of the sleeve 172, and the other end abuts against the top wall of the cylindrical portion 1712 of the connecting member 171, and the spring 173 is a compression spring for applying a biasing force to the connecting member 171 toward the outside of the processing box. The sleeve 172 has two parts with different diameters. The outer cylinder 1721 has a larger diameter and has a flange 1723 that abuts against the photosensitive drum 17. The inner cylinder 1722 has a smaller diameter and has two facing slide grooves 1724 on its side wall. The coupling member 171 has a driving force receiving portion 1711 and a cylindrical portion 1712. Two opposite protrusions 1714 are arranged at the bottom of the cylindrical portion 1712 and protrude radially outward. On both sides of the protrusion 1714, the side wall of the cylindrical portion 1712 is provided with grooves 1713, so that the protrusion 1714 is formed on a cantilever structure with elasticity to facilitate the installation of the coupling member 171 in the sleeve 172. When the coupling member 171 moves axially relative to the sleeve 172, the protrusion 1714 slides in the slide groove 1724. When the coupling member 171 rotates, the protrusion 1714 abuts against the side wall of the slide slot 1724, so that the sleeve 172 and the photosensitive drum 17 are driven to rotate. It can be understood that in other embodiments, the slide slot 1724 can be set to one, three or more, and the protrusion 1714 is also set to one, three or more accordingly.

[0053] It can be seen from the above scheme that the connecting member 171 can move axially relative to the photosensitive drum 17. When the processing box 100 is installed in the electronic photographic imaging device, the connecting member 171 is abutted and moved toward the inside of the photosensitive drum 17, and the gear portion of the driving member engages with the gear member 161. Then, under the action of the biasing device 173, the connecting member 171 moves outward and cooperates with the driving head to transmit the driving force to the photosensitive drum 17.

[0054] Before installing the process cartridge 100, remove the protective cover 13, and then install the process cartridge 100 into the electrophotographic imaging device along the installation direction. The coupling member 171 abuts against the driving head inside the driving member and moves toward the inside of the photosensitive drum 17. The spring 173 is compressed, and the gear portion outside the driving member of the electrophotographic imaging device can mesh with the gear member 161 at the end of the developing roller 16. The contact point of the electrical connection sheet 191 is electrically connected to the electrophotographic imaging device, and can be further electrically connected to the charging roller 18 and the developing roller 16. As the driving member rotates, under the bias of the elastic restoring force of the spring 173, the coupling member 171 moves outward and gradually engages with the driving head, and is driven to rotate, thereby driving the photosensitive drum 17 to rotate, and the gear member 161 is driven to rotate by the gear portion of the driving member, thereby driving the developing roller 16 to rotate, so that the stable transmission of the driving force can be achieved.

[0055] It can be seen from the above scheme that when the processing box 100 is installed on the electronic photographic imaging device, the connecting member 171 at the end of the photosensitive drum 17 and the gear member 161 of the developing roller 16 are connected to the driving head and gear part of the driving member of the electronic photographic imaging device. Since one of the connecting member 171 and the gear member 161 can move relative to the photosensitive drum 17 or the developing roller 16, it can be temporarily moved to avoid to ensure the cooperation or engagement of the other, and then move to the working position with the rotation of the driving member, thereby ensuring the connection between the connecting member 171 and the driving head and the gear member 171 and the gear part. The processing box 100 has a simple structure and the driving force can be transmitted smoothly.

[0056] Example 2

[0057] The structure of the process cartridge in this embodiment may be similar or identical to that in Embodiment 1, except that the moving direction of the coupling member at the end of the photosensitive drum is different.

[0058] like Figures 9 to 11As shown, the processing box 200 includes a box frame composed of a drum frame 21 and a developing frame 24, and rotating components such as a photosensitive drum 27, a developing roller 26 and a charging roller 28 are installed in the box frame, wherein the axis of each component is arranged parallel to the longitudinal direction of the processing box 200; the longitudinal direction of the processing box 200 is parallel to the axial direction of the photosensitive drum 27. In addition to the photosensitive drum 27 and the charging roller 28, a cleaning device for cleaning the photosensitive drum can also be installed on the drum frame 21, and a waste powder bin 211 for collecting waste powder can be provided in the drum frame 21, and a powder bin 241 for accommodating developer can be provided in the developing frame 24, and a stirring frame 25 for stirring developer can be provided in the powder bin 241. The transmission mechanism for driving components such as the photosensitive drum 27, the developing roller 26, and the stirring frame 25 is arranged at the driving end of the processing box 200, and the end cover 22 is arranged outside the transmission mechanism for protecting the transmission mechanism, and a part of the gear member 261 is exposed from the end cover 22. A protective cover 23 is also installed on the box frame to protect the photosensitive drum 27. Before the process box 200 is installed in the electronic photographic imaging device, the protective cover 23 needs to be removed to expose the photosensitive drum 27.

[0059] At the driving end of the processing box 200, a gear member 261 is provided at the end of the developing roller 26, and a coupling member 271 is provided at the end of the photosensitive drum 27, wherein the coupling member 271 is used to connect with the driving head inside the driving member of the electronic photographic imaging device, and the gear member 261 is used to mesh with the gear part outside the driving member to receive the driving force of driving the developing roller and the photosensitive drum from the driving member. An electrical connection piece 291 is also provided at the driving end of the processing box 200, and the part exposed from the box frame forms an electrical contact to be electrically connected to the electronic photographic imaging device. The electrical connection piece 291 is connected to the charging roller 28 and is connected to the developing roller 26 through a wire and a voltage regulator tube 292, wherein the voltage regulator tube 292 is provided in the receiving groove 221 facing the outside of the end cover 22.

[0060] The electrical connection structure of the process box 200 is described below. Fig.12 As shown, the electrical connection piece 291 extends into the box frame and is connected to the bearing 281 at the end of the charging roller 28 through a push piece 293 with an arc-shaped opening, so as to be electrically connected to the charging roller 28. The voltage regulator tube 292 has the functions of reducing and stabilizing voltage, and wires 294 and 295 extend from its two ends respectively, wherein the wire 294 is connected to the electrical connection piece 291, and the wire 295 is connected to the spring 296 at the end of the developing roller 26, so as to be electrically connected to the developing roller 26. When the processing box 200 is installed in the electronic photographic imaging device, the contact of the electrical connection piece 291 is connected to the electronic photographic imaging device to apply a certain voltage to the charging roller 28, and at the same time, the voltage after the voltage reduction is applied to the developing roller through the voltage regulator tube 292. Therefore, voltage can be applied to the developing roller 26 and the charging roller 28 at the same time through one electrical contact, and the electrical contact between the processing box 200 and the electronic photographic imaging device is more stable.

[0061] In this embodiment, the gear member 261 at the end of the developing roller 26 does not move relative to the developing roller 26, while the coupling member 271 at the end of the photosensitive drum 27 can move relative to the photosensitive drum 27 in a direction perpendicular to the longitudinal direction. Figures 13 to 16 The specific structures of the photosensitive drum 27 and the coupling member 271 are described.

[0062] like Figures 13 to 16 As shown, a groove 273 perpendicular to the axis of the photosensitive drum 27 is provided at the adjacent end of the photosensitive drum 27, and the connecting member includes a driving force receiving portion 271 and a connecting member 272. A corresponding protrusion 2722 is provided on the connecting surface of the connecting member 272 facing the groove 273, a groove 2721 is provided on the connecting surface facing the driving force receiving portion 271, and a corresponding protrusion 2712 is provided on the connecting surface of the driving force receiving portion 271 facing the connecting member 272. The extending direction of the protrusion 2722 and the groove 273 can be regarded as a first direction, and the extending direction of the protrusion 2712 and the groove 2721 can be regarded as a second direction. Both the first direction and the second direction are perpendicular to the axial direction of the photosensitive drum or the longitudinal direction of the processing box, and the first direction and the second direction are also perpendicular to each other. The connecting member 272 can slide relative to the groove 273 along the first direction and drive the driving force receiving portion 271 to slide along the direction. At the same time, the driving force receiving portion 271 can slide relative to the connecting member 272 along the second direction, so that the driving force receiving portion 271 can move relative to the photosensitive drum in a plane perpendicular to the longitudinal direction. After the driven end 2711 of the driving force receiving portion 272 receives the driving force, the connection member 272 is driven to rotate by the cooperation between the protrusion 2712 and the groove 2721, and then the connection member 272 drives the photosensitive drum 27 to rotate by the cooperation between the protrusion 2722 and the groove 273. In other embodiments, the positions of the groove and the protrusion can be interchanged without affecting the movement of the driving force receiving portion 271 relative to the photosensitive drum 27.

[0063] Before installing the process cartridge 200, remove the protective cover 23, and then install the process cartridge 200 into the electrophotographic imaging device along the installation direction, the driving force receiving portion 271 abuts against the driving head inside the driving member and moves in a direction perpendicular to the longitudinal direction, the gear portion outside the driving member of the electrophotographic imaging device can mesh with the gear member 261 at the end of the developing roller 26, the contact point of the electrical connection sheet 291 is electrically connected to the electrophotographic imaging device, and can be further electrically connected to the charging roller 28 and the developing roller 26. As the driving member rotates, the driving force receiving portion 271 gradually engages with the driving head and is driven to rotate, thereby driving the photosensitive drum 27 to rotate, and the gear member 261 is driven to rotate by the gear portion of the driving member, thereby driving the developing roller 26 to rotate, thereby achieving stable transmission of the driving force.

[0064] It can be seen from the above scheme that the connecting member 171 can move perpendicularly to the longitudinal direction relative to the photosensitive drum 27. When the processing box is installed to the electronic photographic imaging device, if there is interference, the connecting member 171 will slide laterally, and the gear part of the driving member will engage with the gear member 261. Then, as the driving head rotates, the connecting member 171 cooperates with the driving head to transmit the driving force to the photosensitive drum 27.

[0065] Example 3

[0066] The structure of the processing box in this embodiment may be similar or identical to that in Embodiment 1 and Embodiment 2, except that the gear member at the end of the developing roller can move relative to the developing roller while the connecting member at the end of the photosensitive drum does not move relative to the photosensitive drum.

[0067] like Figure 17 to Figure 18 As shown, the process box 300 includes a box frame composed of a drum frame 31 and a developing frame 34, and rotating components such as a photosensitive drum 37, a developing roller 36 and a charging roller 38 are installed in the box frame, wherein the shafts of each component are arranged in parallel along the longitudinal direction of the process box 300. In addition to the photosensitive drum 37 and the charging roller 38, a cleaning device for cleaning the photosensitive drum can also be installed on the drum frame 31, and a waste powder bin 311 for collecting waste powder can be provided in the drum frame 31, and a powder bin 341 for accommodating developer can be provided in the developing frame 34, and a stirring frame 35 for stirring developer can be provided in the powder bin 341. The transmission mechanism for driving components such as the photosensitive drum 37, the developing roller 36, and the stirring frame 35 is arranged at the driving end of the process box 300, and the end cover 32 is arranged outside the transmission mechanism for protecting the transmission mechanism, and a part of the gear member 361 is exposed from the end cover 32. A protective cover 33 is also installed on the box frame to protect the photosensitive drum 37. Before the process box 300 is installed in the electrophotographic imaging device, the protective cover 33 needs to be removed to expose the photosensitive drum 37.

[0068] At the driving end of the processing box 300, a gear member 361 is provided at the end of the developing roller 36, and a coupling member 371 is provided at the end of the photosensitive drum 37, wherein the coupling member 371 is used to connect with the driving head inside the driving member of the electronic photographic imaging device, and the gear member 361 is used to mesh with the gear part outside the driving member to receive the driving force of driving the developing roller and the photosensitive drum from the driving member. An electrical connection piece 391 is also provided at the driving end of the processing box 300, and the part exposed from the box frame forms an electrical contact to be electrically connected to the electronic photographic imaging device. The electrical connection piece 391 is connected to the charging roller 38 and is connected to the developing roller 36 through a wire and a voltage regulator tube 392, wherein the voltage regulator tube 392 is provided in the receiving groove 321 facing the outside of the end cover 32.

[0069] The electrical connection structure of the process box is described below. Fig. 20As shown, the electrical connection piece 391 extends into the box frame and is connected to the bearing 381 at the end of the charging roller 38 through a push piece 393 with an arc-shaped opening, so as to be electrically connected to the charging roller 38. The voltage regulator tube 392 has the functions of reducing and stabilizing voltage, and wires 394 and 395 extend from its two ends respectively, wherein the wire 394 is connected to the electrical connection piece 391, and the wire 395 is connected to the spring 396 at the end of the developing roller 36, so as to be electrically connected to the developing roller 36. When the processing box 300 is installed in the electronic photographic imaging device, the contact of the electrical connection piece 391 is connected to the electronic photographic imaging device to apply a certain voltage to the charging roller 38, and at the same time, the voltage after the voltage reduction is applied to the developing roller through the voltage regulator tube 392. Therefore, voltage can be applied to the developing roller 36 and the charging roller 38 at the same time through one electrical contact, and the electrical contact between the processing box 300 and the electronic photographic imaging device is more stable.

[0070] In this embodiment, the gear member 361 at the end of the developing roller 36 can move relative to the developing roller 363 in a direction perpendicular to the longitudinal direction, while the coupling member 371 at the end of the photosensitive drum 37 does not move relative to the photosensitive drum 37. Figure 21 to Figure 23 The specific structures of the developing roller 36 and the gear member 361 are described.

[0071] like Figure 21 to Figure 23 As shown, a groove 363 perpendicular to the axis of the developing roller 36 is provided at the adjacent end portion thereof, and the gear member includes a gear portion 361 and a connecting member 362. A corresponding protrusion 3622 is provided on the connecting surface of the connecting member 362 facing the groove 363, a protrusion 3621 is provided on the connecting surface facing the gear portion 361, and a corresponding groove 3612 is provided on the connecting surface of the gear portion 361 facing the connecting member 362. The extending direction of the protrusion 3622 and the groove 363 can be regarded as a first direction, and the extending direction of the protrusion 3621 and the groove 3612 can be regarded as a second direction. Both the first direction and the second direction are perpendicular to the axial direction of the developing roller or the longitudinal direction of the process cartridge, and the first direction and the second direction are also perpendicular to each other. The connecting member 362 can slide relative to the groove 363 along the first direction, and drive the gear portion 361 to slide along the direction, and at the same time, the gear portion 361 can slide relative to the connecting member 362 along the second direction, so that the gear portion 361 can move relative to the developing roller in a plane perpendicular to the longitudinal direction. After the gear 3611 of the gear portion 362 receives the driving force, the coupling member 362 is driven to rotate by the cooperation between the groove 3612 and the protrusion 3621, and then the coupling member 362 drives the developing roller 36 to rotate by the cooperation between the protrusion 3622 and the groove 363. In other embodiments, the positions of the groove and the protrusion can be interchanged without affecting the movement of the gear portion 361 relative to the developing roller 36.

[0072] Before installing the process cartridge 300, remove the protective cover 33, and then install the process cartridge 300 into the electrophotographic imaging device along the installation direction, the driving force receiving portion 371 engages with the driving head inside the driving member, the gear portion outside the driving member of the electrophotographic imaging device pushes the gear member 361 at the end of the developing roller 36 to move in a direction perpendicular to the longitudinal direction, and the contact of the electrical connection sheet 391 is electrically connected to the electrophotographic imaging device, and further electrically connected to the charging roller 38 and the developing roller 36. As the driving member rotates, the gear 3611 gradually meshes with the gear portion of the driving member and is driven to rotate, thereby driving the developing roller 36 to rotate, and at the same time, the driving head drives the connecting member 371 to rotate, thereby driving the photosensitive drum 37 to rotate, thereby realizing stable transmission of the driving force. Due to the offset of the gear member 361, the gear member 361 and the developing roller 36 may be out of axial alignment, and since the connecting member 362 can slide relative to the gear member 361 and the developing roller 36, the gear member 361 can still drive the developing roller 36 to rotate. Then, as the gear member 361 rotates, its position can be gradually adjusted to a position coaxial with the developing roller 36, and drive the developing roller 36 to rotate stably.

[0073] It can be seen from the above scheme that the gear member 361 can move perpendicularly to the longitudinal direction relative to the developing roller 36. When the processing box 100 is installed to the electronic photographic imaging device, the gear member 361 slides laterally, and the driving head is connected to the connecting member 371. Then, as the driving member rotates, the gear member 361 engages with the gear part of the driving member to transmit the driving force to the developing roller 36.

[0074] In this embodiment, by setting the gear member 361 and the developing roller 36 to be non-coaxial, the gear member 361 can be set relatively smaller, so that it can be closer to the driving member. The gear member 361 is more closely meshed with the gear part of the driving member of the electronic photographic imaging device, and the transmission is more stable.

[0075] Example 4

[0076] This embodiment is an improvement of Embodiment 3. In addition to the gear member at the end of the developing roller being movable relative to the developing roller, compared with Embodiment 3, the diameter of the developing roller is the same, but the diameter of the gear member is smaller. Therefore, during operation, the axis of the gear member and the axis of the developing roller are located at different positions.

[0077] like Fig.24As shown, in this embodiment, a groove is provided at the end adjacent to the developing roller, the gear member includes a gear part and a connecting member 462, a corresponding protrusion 4622 is provided on the connecting surface of the connecting member facing the groove, a protrusion 4621 is provided on the connecting surface facing the gear part, and a corresponding groove is provided on the connecting surface of the gear part facing the connecting member. The extension direction of the protrusion 4622 can be regarded as a first direction, and the extension direction of the protrusion 4621 can be regarded as a second direction. The first direction and the second direction are both perpendicular to the axial direction of the developing roller, and the first direction and the second direction are also perpendicular to each other, so that the gear part can move relative to the developing roller in a plane perpendicular to the longitudinal direction. The center line of the protrusion 4622 passes through the axis of the connecting member 462, while the center line of the protrusion 4621 does not pass through the axis of the connecting member 462, that is, the protrusion 4621 is eccentrically arranged. After the gear of the gear part receives the driving force and drives the connecting member 462 to rotate, the axis of rotation of the connecting member 462 is different from the axis of the gear part, and then the connecting member 462 drives the developing roller to rotate. In other embodiments, the positions of the groove and the protrusion can be interchanged.

[0078] In this embodiment, because the developing gear is not coaxial with the developing roller and is closer to the driving member, the meshing between the developing gear and the gear portion of the driving member of the electrophotographic imaging device is tighter, and the transmission is more stable. In this embodiment, in addition to the electrical contact point provided at the end of the charging roller, the end of the developing roller can also be provided with an electrical contact point electrically connected to the electrophotographic imaging device, and it is no longer necessary to electrically connect the charging roller through a voltage regulator tube and a wire, and the electrical connection between the charging roller, the developing roller and the electrophotographic imaging device can also be more stable.

[0079] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the scope of the present invention. Any person skilled in the art can make some improvements without departing from the scope of the present invention, that is, any changes or improvements made according to the present invention should be covered by the protection scope of the present invention.

Claims

1. A process cartridge for an electronic photographic imaging device, the process cartridge comprising a cartridge frame, a photosensitive drum, a developing roller and a charging roller, the photosensitive drum, the developing roller and the charging roller being rotatably mounted on the cartridge frame; one longitudinal end of the process cartridge being a driving end, the driving end being provided with a coupling member for driving the photosensitive drum, characterized in that: The driving end is also provided with an electrical contact, a conductor and a voltage reducing device which can be electrically connected to the electrophotographic imaging device. The electrical contact is electrically connected to the charging roller and is electrically connected to the developing roller through the conductor and the voltage reducing device.

2. The process cartridge according to claim 1, wherein: The process cartridge further includes an electrical connection sheet, which is electrically connected to the charging roller and is electrically connected to the developing roller via the conductor and the voltage reducing device.

3. The process cartridge according to claim 2, wherein: The processing box also includes an end cover located at the driving end, the end cover has a receiving groove facing outward, and the pressure reducing device is arranged in the receiving groove.

4. The process cartridge according to any one of claims 1 to 3, characterized in that: The voltage reducing device is a voltage regulator tube, and the conductor is a wire.

5. The process cartridge according to claim 4, wherein: The coupling member is movable relative to the photosensitive drum along the axial direction of the photosensitive drum; a biasing device is provided between the coupling member and the photosensitive drum body, and the biasing device applies an outward biasing force to the coupling member.

6. The process cartridge according to claim 4, wherein: The coupling member is movable relative to the photosensitive drum in a plane perpendicular to an axial direction of the photosensitive drum.

7. The process cartridge according to claim 6, wherein: The connecting member includes a driving force receiving portion and a connecting member, wherein the connecting member is arranged between the driving force receiving portion and the photosensitive drum; the connecting member can slide in a first direction relative to the photosensitive drum, and the first direction is perpendicular to the axial direction of the photosensitive drum; the driving force receiving portion can slide in a second direction relative to the connecting member, and the second direction is perpendicular to the axial direction of the photosensitive drum and the first direction.

8. The process cartridge according to claim 7, wherein: The photosensitive drum is provided with a groove or a protrusion, and one end of the connecting member is provided with a corresponding protrusion or groove; the other end of the connecting member is provided with a groove or a protrusion, and the driving force receiving part is provided with a corresponding protrusion or groove.

9. The process cartridge according to claim 4, wherein: The process cartridge further comprises a gear member connected to an end of the developing roller; the gear member is movable relative to the developing roller in a plane perpendicular to the axial direction of the photosensitive drum.

10. The process cartridge according to claim 9, wherein: The gear member and the developing roller are not coaxial when rotating.

Images