Developing Cartridge

Abstract

The present invention discloses a developing cartridge, comprising a cartridge body, a developing roller, an electrode member and an electrode driving member; the electrode member includes a conductive contact portion and a force-receiving portion, and the force-receiving portion is used to receive a force that causes the electrode member to move from a first position to a second position; a linkage mechanism is provided on the developing cartridge, the linkage mechanism includes a handle member and a movable member, and the electrode driving member is disposed on the movable member or forms a part of the movable member; the handle member is rotatably connected to the cartridge body, the movable member can move in the length direction of the developing roller, and the movement of the movable member is associated with the rotation of the handle member; when the movable member extends outward from the cartridge body as the handle member rotates, the electrode driving member drives the electrode member to move from the first position to the second position. In the present invention, the conductive contact portion of the electrode member can form a stable and reliable electrical connection with the power supply electrode in the electrophotographic imaging device even after long-term use, and is not easily damaged.

Description

[0001] Divisional Application Statement

[0002] This application is a divisional application of a Chinese patent application with the filing date of April 21, 2021, application number 202110431767.X, and invention title "Developing Cartridge". Technical Field

[0003] The present invention relates to a developing cartridge for an electrophotographic imaging device. Background Art

[0004] A developing cartridge is usually detachably installed in an electrophotographic imaging device such as a laser printer, a copier, a fax machine, etc. After the developing cartridge is installed in the electrophotographic imaging device, an electrode member provided on the developing cartridge is electrically connected to a power supply electrode on the electrophotographic imaging device, so as to realize power supply of the electrophotographic imaging device to the developing cartridge, and further supply power to a developing roller, a powder feeding roller and a layer thickness adjusting member in the developing cartridge.

[0005] There is a conventional processing cartridge, in which an elastically movable spring is provided on the cartridge body as an electrode member. After the developing cartridge is installed in the machine, the electrode member is pressed by the power supply electrode in the electrophotographic imaging device and is electrically connected to the power supply electrode, so as to realize power supply of the electrophotographic imaging device to the developing cartridge. In such a developing cartridge, compared with after installation in the machine, the conductive contact portion of the electrode member is in a more protruding position before installation in the machine, and there is a risk of being easily damaged (for example, being more easily damaged due to collision with other objects). In addition, during the installation and disassembly of the developing cartridge, a large frictional force will be formed between the conductive contact portion of the electrode member and the power supply electrode in the electrophotographic imaging device, which is likely to cause wear and lead to poor electrical conductivity. Summary of the Invention

[0006] The main object of the present invention is to provide a developing cartridge in which the conductive contact portion of the electrode member is not easily damaged and can form a stable and reliable electrical connection with the electrophotographic imaging device even under long-term use.

[0007] To achieve the above main object, the present invention provides a developing cartridge, which includes a cartridge body, a developing roller and an electrode member electrically connected to the developing roller. The developing roller is rotatably supported on the cartridge body; wherein, the electrode member is movably arranged on the cartridge body and includes a conductive contact portion and a force-receiving portion; the force-receiving portion is used for receiving a force that causes the electrode member to move from a first position to a second position, and the conductive contact portion protrudes more from the outside of the cartridge body in the second position than in the first position.

[0008] According to a specific embodiment of the present invention, the electrode member is rotatably arranged on the cartridge body and can rotate from a first position to a second position; the rotation axis of the electrode member is arranged between the force-receiving portion and the conductive contact portion.

[0009] According to another specific embodiment of the present invention, the electrode member is slidably disposed on the cartridge and can slide from a first position to a second position.

[0010] Further, when the electrode member is slidably disposed on the cartridge, the conductive contact portion is further away from the developing roller in the second position than in the first position.

[0011] Further, the cartridge has a sliding guide surface that slidably contacts the electrode member, and in the sliding direction of the electrode member sliding from the first position to the second position, the sliding guide surface gradually inclines toward the outside of the cartridge.

[0012] According to a specific embodiment of the present invention, an elastic element is provided between the electrode member and the cartridge, and the elastic element is used to apply an elastic force for holding the electrode member in the first position.

[0013] According to a specific embodiment of the present invention, the electrode member is movably disposed on one of the longitudinal sidewalls of the cartridge.

[0014] Further, the cartridge includes a conductive bracket disposed on the above-mentioned longitudinal sidewall, and the conductive bracket rotatably supports one of the longitudinal ends of the developing roller; the electrode member is movably disposed on the conductive bracket and is electrically connected to the developing roller through the conductive bracket.

[0015] Furthermore, a receiving recess is formed on the conductive bracket, and the electrode member is disposed in the receiving recess.

[0016] In some embodiments of the present invention, an electrode driving member may be provided on the cartridge, and the electrode driving member is used to directly or indirectly drive the electrode member to move from the first position to the second position.

[0017] In the present invention, when the developing cartridge is not installed at a predetermined installation position in the electrophotographic imaging device, the conductive contact portion of the electrode member is located at the initial first position; when the developing cartridge is installed in the electrophotographic imaging device, the electrode member moves from the initial first position to the second position, and the conductive contact portion moves correspondingly toward the outside of the cartridge and protrudes more from the outside of the cartridge, so as to be electrically connected to the power supply electrode on the electrophotographic imaging device, realizing the power supply of the electrophotographic imaging device to the developing cartridge.

[0018] The developing cartridge of the present invention has at least the following advantages: First, compared with after being installed in the machine, the conductive contact part of the electrode member is in a position that is more recessed toward the inside of the cartridge before being installed in the machine, so the conductive contact part is not easily damaged; Second, the electrode member is forced so that its conductive contact part contacts the power supply electrode, making the electrical connection between the two have better reliability; Further, only when the developing cartridge is installed in place does the conductive contact part contact the power supply electrode, and during the installation and disassembly of the developing cartridge, the conductive contact part basically no longer rubs against the power supply electrode of the electrophotographic imaging device, avoiding or reducing the wear between the two, so that the developing cartridge can form a stable electrical connection with the electrophotographic imaging device even after long-term use.

[0019] To more clearly illustrate the purpose, technical solution and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the first three-dimensional structure diagram of Embodiment 1 of the developing cartridge of the present invention;

[0021] Figure 2 is the structure diagram of the second end of Embodiment 1 of the developing cartridge of the present invention, where the electrode member is in a disassembled state;

[0022] Figure 3 is the three-dimensional structure diagram of the electrode member in Embodiment 1 of the developing cartridge of the present invention;

[0023] Figure 4 is the front view of the conductive bracket part in Embodiment 1 of the developing cartridge of the present invention;

[0024] Figure 5 is Figure 4 the A-A cross-sectional view of [], which shows the position change of the conductive contact part before and after the developing cartridge is installed in place;

[0025] Figure 6 is the second three-dimensional structure diagram of Embodiment 1 of the developing cartridge of the present invention, where the movable member is in its initial position;

[0026] Figure 7 is the exploded view of the structure of Embodiment 1 of the developing cartridge of the present invention;

[0027] Figure 8 is the third three-dimensional structure diagram of Embodiment 1 of the developing cartridge of the present invention, where the movable member is in its extended position;

[0028] Figure 9 is the transverse cross-sectional view of Embodiment 1 of the developing cartridge of the present invention;

[0029] Figure 10 is the three-dimensional structure diagram of Embodiment 2 of the developing cartridge of the present invention;

[0030] Figure 11 It is a structural diagram of the second end portion of the developing cartridge according to the second embodiment of the present invention, where the electrode member is in a disassembled state;

[0031] Figure 12 It is a front view of the conductive support part in the developing cartridge according to the second embodiment of the present invention;

[0032] Figure 13 is Figure 12 The A-A cross-sectional view of, which shows the position change of the conductive contact part before and after the developing cartridge is installed in place;

[0033] Figure 14 It is a structural diagram of the electrode member and the electrode driving member part in the developing cartridge according to the third embodiment of the present invention, where the electrode member is in the first position;

[0034] Figure 15 The exploded view of the electrode member and the electrode driving member part in the developing cartridge according to the third embodiment of the present invention;

[0035] Figure 16 It is a structural diagram of the electrode member and the electrode driving member part in the developing cartridge according to the third embodiment of the present invention, where the electrode member is in the second position;

[0036] Figure 17 It is a structural diagram of the electrode member and the electrode driving member part in the developing cartridge according to the fourth embodiment of the present invention, where the electrode member is in the first position;

[0037] Figure 18 It is a structural diagram of the electrode member and the electrode driving member part in the developing cartridge according to the fourth embodiment of the present invention, where the electrode member is in the second position;

[0038] Figure 19 It is a structural diagram of the electrode member and the electrode driving member part in the developing cartridge according to the fifth embodiment of the present invention, where the electrode member is in the first position;

[0039] Figure 20 It is a structural diagram of the electrode member and the electrode driving member part in the developing cartridge according to the fifth embodiment of the present invention, where the electrode member is in the second position. Detailed implementation manners

[0040] Example 1

[0041] Such as Figure 1As shown, the developing cartridge of Embodiment 1 includes a cartridge body 11 and a developing roller 12. The developing roller 12 is rotatably supported at a first end portion 11a and a second end portion 11b of the cartridge body 11. The first end portion 11a is provided with a power receiving portion that can receive a rotational driving force from an electrophotographic imaging device to drive the developing roller 12 to rotate. The second end portion 11b has a side wall 16 and a conductive bracket 13 mounted on the side wall 16. A longitudinal end portion of the developing roller 12 is rotatably supported on the conductive bracket 13 and forms an electrical connection with the conductive bracket 13.

[0042] The conductive bracket 13 has a receiving recess 131. The developing cartridge further includes an electrode member 15 disposed in the receiving recess 131. After the developing cartridge is installed in the electrophotographic imaging device, the electrode member 15 can establish an electrical connection with a power supply electrode in the electrophotographic imaging device, so that the electrophotographic imaging device can provide a developing bias voltage to the developing roller 12 through the electrode member 15 and the conductive bracket 13.

[0043] The electrode member 15 is rotatably disposed in the receiving recess 131. As Figures 2-3 shown, a rotating shaft 132 is provided in the receiving recess 131. The rotating shaft 132 is disposed at a substantially middle position in the length direction of the receiving recess 131 and is substantially parallel to the side wall 16. The electrode member 15 includes a conductive contact portion 151, a force receiving portion 152, and a pivot hole 153. The conductive contact portion 151 and the force receiving portion 152 are respectively disposed at opposite ends of the electrode member 15, and the conductive contact portion 151 is closer to the developing roller 12 than the force receiving portion 152. The pivot hole 153 is disposed at a substantially middle position in the length direction of the electrode member 15. The inner side of the pivot hole 153 has two relatively arranged elastic clamping arms 154, and an opening is formed between the two elastic clamping arms 154.

[0044] When assembling the electrode member 15 into the receiving recess 131, the rotating shaft 132 enters the pivot hole 153 through the opening between the two elastic clamping arms 154, so that the electrode member 15 is rotatably connected to the rotating shaft 132. The elastic clamping arms 154 are used to prevent the electrode member 15 from detaching from the rotating shaft 132. The electrode member 15 can rotate between an initial first position and a second position around the rotating shaft 132. The rotation axis of the electrode member 15 is located between the conductive contact portion 151 and the force receiving portion 152.

[0045] A spring 14, which is an example of an elastic element, is provided between the electrode member 15 and the cartridge body 11. The spring 14 is used to apply an elastic force to hold the electrode member 15 in the first position. The spring 14 can be disposed within the receiving recess 13 and is located on the side of the receiving recess 131 away from the developing roller 12. The inner side of the force-receiving portion 152 has a hollow cavity 155, and a columnar protrusion 156 is provided within the hollow cavity 155; the outer end of the spring 14 is sleeved on the columnar protrusion 156, and the inner end abuts against the cartridge body 11. When the developing cartridge is not installed at the predetermined installation position within the electrophotographic imaging apparatus, the spring 14 applies an elastic acting force toward the outside of the cartridge body 11 to the force-receiving portion 152 of the electrode member 15, holding the electrode member 15 in its initial first position. At this time, the conductive contact portion 151 can be retracted into the receiving recess 131.

[0046] Figure 4 is a front view of a part of the conductive support 13 in Embodiment 1 of the developing cartridge; Figure 5 is Figure 4 a cross-sectional view taken along line A-A, which shows the position change of the conductive contact portion 151 before and after the developing cartridge is installed in place. As Figure 5 shown, when the developing cartridge is not installed at the predetermined installation position within the electrophotographic imaging apparatus, under the elastic force of the spring 14, the conductive contact portion 151 of the electrode member 15 is in its initial first position 151a, and the conductive contact portion 151 is retracted into the receiving recess 131 in the first position 151a. Thus, during the installation process of the developing cartridge (before being installed in place), the conductive contact portion 151 basically does not rub against the power supply electrode within the electrophotographic imaging apparatus.

[0047] After the developing cartridge is installed at the predetermined installation position within the electrophotographic imaging apparatus, a corresponding force-applying portion (not shown in the figure) within the electrophotographic imaging apparatus will apply a force F1 toward the inside of the cartridge body 11 to the force-receiving portion 152 of the electrode member 15, causing the electrode member 15 to overcome the elastic force of the spring 14 and rotate from the first position to the second position around the rotation axis 132 in the direction R1; correspondingly, the force-receiving portion 152 rotates toward the inside of the cartridge body 11, and the conductive contact portion 151 rotates from the first position 151a toward the outside of the cartridge body 11 to the second position 151b. The conductive contact portion 151 protrudes more from the outside of the cartridge body 11 in the second position 151b than in the first position 151a, so as to be able to contact and form an electrical connection with the power supply electrode within the electrophotographic imaging apparatus. In other words, in Embodiment 1, in the length direction L of the developing roller 12, the second position 151b of the conductive contact portion 151 is located outside the first position 151a.

[0048] When removing the developing cartridge from the electrophotographic imaging device, as the developing cartridge moves away from the predetermined installation position, the force-receiving portion 152 of the electrode member 15 separates from the biasing portion on the electrophotographic imaging device. Under the action of the spring 14, the conductive contact portion 151 of the electrode member 15 returns from the second position 151b to the initial first position 151a, such that substantially no friction is generated between the conductive contact portion 151 and the power supply electrode during the disassembly process.

[0049] To facilitate the installation and disassembly operations of the developing cartridge, as Figure 6 shown, a handle member 17 is provided on the side of the cartridge body 11 away from the developing roller 12. In the length direction of the developing roller 12, the handle member 17 is located at approximately the middle position of the cartridge body 11. The handle member 17 can be rotatably connected to the cartridge body 11. As Figure 7 shown, the side of the cartridge body 11 away from the developing roller 12 has a recess 111. In the length direction of the developing roller 12, a pivot hole 112 is provided on each of the opposite sides of the recess 111; the handle member 17 has a handle rotating shaft (not visible in the figure) rotatably disposed in the pivot hole 112. The handle member 17 can rotate about the handle rotating shaft, and the rotation axis of the handle member 17 can be parallel to the developing roller 12.

[0050] A rotation guiding mechanism can be provided between the handle member 17 and the cartridge body 11 to make the rotation process of the handle member 17 smoother. For example Figure 7 shown, a guiding protrusion 172 is provided on each of the opposite sides of the handle member 17, and an arc-shaped guiding portion 113 is provided on each of the opposite sides of the recess 111. The guiding protrusion 172 is carried on the arc-shaped guiding portion 113. When the handle member 17 rotates, the guiding protrusion 172 slides along the arc-shaped guiding portion 113.

[0051] As Figure 6 and 7 shown, two movable members 18 are further provided on the cartridge body 11. In the length direction of the developing roller 12, the two movable members 18 are substantially symmetrically disposed on the opposite sides of the handle member 17. The movable member 18 includes a connecting portion 181 and a rod portion 182 integrally formed or fixedly connected. The cartridge body 11 has a through-type guiding hole 114, and the rod portion 182 is inserted into the guiding hole 114.

[0052] The movable member 18 can move in the length direction of the developing roller 12, and the movement of the movable member 18 is associated with the rotation of the handle member 17. For example, a sliding groove 171 is provided on each of the opposite sides of the handle member 17, and the sliding groove 171 is inclined with respect to the length direction of the developing roller 12. A sliding protrusion 1811 is provided on the connecting portion 181, and the sliding protrusion 1811 is disposed in the sliding groove 171. Through the cooperation between the sliding groove 171 and the sliding protrusion 1811, the movement of the handle member 17 is associated with the movement of the movable member 18.

[0053] The handle member 17 can rotate between the initial position as shown in Figure 6 and the abutting position as shown in Figure 8 . As shown in Figure 6 , when the handle member 17 is in its initial position, the rod portion 182 is also in its initial position, and at this time, the rod portion 182 is retracted into the cartridge body 11 (i.e., does not protrude from the longitudinal end of the cartridge body 11). Before the developing cartridge is installed in the machine, both the handle member 17 and the movable member 18 are in their initial positions. As shown in Figure 7 , an elastic buckle 1812 is provided on the connecting portion 181, and a card slot 115 is provided on the cartridge body 11. The engaging convex portion of the elastic buckle 1812 can be inserted into the card slot 115 to hold the handle member 17 and the movable member 18 in their initial positions. As shown in Figure 8 , when the handle member 17 rotates from the initial position to the abutting position, the movable member 18 moves outward to the protruding position in the length direction of the developing roller 12 towards the outside of the cartridge body 11. At this time, the end of the rod portion 182 extends out of the cartridge body 11 from the guide hole 114.

[0054] Please refer to Figure 9 . The developing cartridge can be installed in the electrophotographic imaging device along the X direction. During the installation process, another corresponding force-applying portion in the electrophotographic imaging device will abut against the handle member 17 and apply a force to the handle member 17, causing the handle member 17 to rotate from its initial position to the abutting position along the R2 direction, and the movable member 18 will correspondingly move from its initial position to the protruding position. At this time, the end of the rod portion 182 extends out from the longitudinal end of the cartridge body 11 and can cooperate with the separation / contact mechanism in the electrophotographic imaging device to separate or contact the developing roller 12 from the photosensitive drum.

[0055] Example 2

[0056] As shown in Figure 10 , the developing cartridge of Embodiment 2 includes a cartridge body 21 and a developing roller 22. The developing roller 22 is rotatably supported at the first end 21a and the second end 21b of the cartridge body 21. The second end 21b has a side wall 26 and a conductive bracket 23 mounted on the side wall 26. One end of the developing roller 22 is rotatably supported on the conductive bracket 23 and forms an electrical connection with the conductive bracket 23.

[0057] The conductive bracket 23 has a receiving recess 231. An electrode member 25 is provided in the receiving recess 231. After the developing cartridge is installed in the machine, the electrode member 25 can establish an electrical connection with the power supply electrode in the electrophotographic imaging device, so that the electrophotographic imaging device can provide a developing bias voltage to the developing roller 22 through the electrode member 25 and the conductive bracket 23.

[0058] The electrode member 25 is slidably disposed within the receiving recess 231 and is capable of sliding between an initial first position and a second position. As Figure 11 shown, the electrode member 25 includes a conductive contact portion 251 and a force-receiving portion 252. The conductive contact portion 251 is disposed at one end of the electrode member 25 close to the developing roller 12, and the force-receiving portion 252 is disposed at a substantially middle position in the longitudinal direction of the electrode member 25. A stopper portion 232 is provided on the conductive support 23, and the electrode member 25 has a stopper portion 253. When the electrode member 25 is in the first position, the stopper portion 232 abuts against the stopper portion 253.

[0059] A spring 24, which is an example of an elastic element, is further provided within the receiving recess 231. The spring 24 is connected to an end of the electrode member 25 away from the developing roller 12 and is used to apply an elastic force to the electrode member 25. When the developing cartridge is not installed at a predetermined installation position within the electrophotographic imaging apparatus, under the urging of the spring 24, the stopper portion 232 abuts against the stopper portion 253, holding the electrode member 25 in its initial first position.

[0060] Figure 12 is a front view of a portion of the conductive support 23 in Embodiment 2; Figure 13 is Figure 12 a cross-sectional view taken along line A-A of Figure 13 which shows the position change of the conductive contact portion 251 before and after the developing cartridge is installed in place. As

[0061] shown, when the developing cartridge is not installed at a predetermined installation position within the electrophotographic imaging apparatus, the conductive contact portion 251 is located at its initial first position 251a; after the developing cartridge is installed at a predetermined installation position within the electrophotographic imaging apparatus, another corresponding force-applying portion (not shown in the figure) within the electrophotographic imaging apparatus will apply a force F2 to the force-receiving portion 252 of the electrode member 25, causing the electrode member 25 to slide in a direction away from the developing roller 12 against the action of the spring 24 to the second position, and the conductive contact portion 251 accordingly moves from the first position 251a to the second position 251b.

[0061] As Figure 13 shown, the electrode member 25 is in sliding contact with the bottom surface 233 of the receiving recess 231, and the bottom surface 233 constitutes a sliding guide surface for the electrode member 25. In the sliding direction of the electrode member 25 from the first position to the second position ( Figure 13In the direction of the acting force F2, the bottom surface 233 gradually inclines towards the outside of the cartridge body 11. In this way, when the electrode member 25 slides along the bottom surface 233 from the first position to the second position, the conductive contact portion 251 gradually protrudes more from the outside of the cartridge body 21. That is to say, in the length direction L of the developing roller 22, the second position 251b of the conductive contact portion 251 is outside the first position 251a. At the second position 251b, the more protruding conductive contact portion 251 can contact the power supply electrode in the electrophotographic imaging device and form an electrical connection.

[0062] Before the developing cartridge is installed in place, since the force receiving portion 252 does not contact the force applying portion in the electrophotographic imaging device, the conductive contact portion 251 in the first position 251a basically does not generate friction with the power supply electrode in the electrophotographic imaging device or only generates slight friction. When the developing cartridge is removed from the electrophotographic imaging device, as the developing cartridge leaves the predetermined installation position, the force receiving portion 251 of the electrode member 25 separates from the force applying portion on the electrophotographic imaging device. Under the action of the spring 24, the conductive contact portion 251 of the electrode member 25 returns from the second position 251b to the initial first position 251a, so that basically no friction or only slight friction is generated between the electrical contact portion 251 and the power supply electrode during the disassembly process.

[0063] It should be noted that in the above embodiments 1 and 2, the electrode member may also be provided at other positions of the cartridge body, such as at the first end of the cartridge body, or at the non-conductive support portion on the side wall of the second end of the cartridge body, and is electrically connected to the developing roller through an intermediate conductive member.

[0064] Example 3

[0065] As Figure 14 and 15 shown, the developing cartridge of Embodiment 3 further includes an electrode driving member 31 and a pushing member 32. The pushing member 32 is disposed between the electrode driving member 31 and the electrode member 35. The electrode driving member 31 can drive the electrode member 35 to move from the first position to the second position through the pushing member 32.

[0066] The electrode member 35 has a U-shaped conductive contact portion 351, a connecting portion 352, and a force-receiving portion 353. The force-receiving portion 353 is located between the conductive contact portion 351 and the connecting portion 352. A rotating shaft 331 is provided on the inner side of the conductive bracket 33. The connecting portion 352 is rotatably sleeved on the rotating shaft 331, so that the electrode member 35 can rotate around the rotating shaft 331. At the same time, the inner side of the conductive bracket 33 also has a chute 332 that is inclined with respect to the side wall of the cartridge body. The electrode member 35 is disposed in the chute 332. The chute 332 is configured to guide the electrode member 35 to slide outward of the cartridge body in the chute 332 during the process that the electrode member 35 is pushed by the pushing member 32 and rotates around the rotating shaft 331.

[0067] A spring 34 is connected between the conductive bracket 33 and the electrode member 35. The spring 34 is used to apply an elastic force to the electrode member 35 to hold the electrode member 35 in the initial first position. Before the developing cartridge is installed in the machine, the electrode member 35 is in the first position. As Figure 14 shown, in the first position, the conductive contact portion 351 basically does not protrude outside the conductive bracket 33.

[0068] The electrode driving member 31 is disposed on a side of the cartridge body away from the developing roller and can move outward of the cartridge body along the M direction. The M direction can be parallel to the length direction of the developing roller. The first end portion 321 of the pushing member 32 abuts against the electrode driving member 31, and the second end portion 322 abuts against the force-receiving portion 353 of the electrode member 35. As Figure 15 shown, the first end portion 321 of the pushing member 32 is provided with a first abutting inclined surface 3211, and the electrode driving member 31 is provided with a guiding groove 312. The guiding groove 312 has a second abutting inclined surface 311, and the second abutting inclined surface 311 is in sliding contact with the first abutting inclined surface 3211.

[0069] In this way, as Figure 16 shown, when the electrode driving member 31 moves outward of the cartridge body along the M direction, the pushing member 32 will move toward the electrode member 35 and force the electrode member 35 to rotate around the rotating shaft 331 and move outward of the cartridge body along the chute 332, so that the electrode member 35 moves from the initial first position to the second position. In the second position, the conductive contact portion 351 protrudes outside the conductive bracket 33.

[0070] A linkage mechanism may be provided on the developing cartridge. The linkage mechanism may include a handle member and a movable member as described in Embodiment 1. The electrode driving member 31 may be provided on the movable member or formed as a part of the movable member. During the installation process, the electrophotographic imaging device acts on the linkage mechanism to move the electrode driving member 31 and the movable member together in the M direction toward the outside of the cartridge body. During this process, the electrode driving member 31 drives the electrode member 35 to move from the first position to the second position through the pushing member 32. After the electrode member 35 moves to the second position, the conductive contact portion 351 contacts the power supply electrode in the electrophotographic imaging device and forms an electrical connection, and supplies a developing bias voltage to the developing roller through the conductive bracket 33.

[0071] As Figure 16 shown, in Embodiment 3, an elastic element 36 (such as a spring) may be provided between the pushing member 32 and the cartridge body. One end of the elastic element 36 is mounted on the pushing member 32, and the other end abuts against the cartridge body. The elastic element 36 can assist the pushing member 32 to push the electrode member 35 to slide from the first position to the second position.

[0072] Example 4

[0073] As Figure 17 shown, the developing cartridge of Embodiment 4 includes an electrode driving member 41, a chute member 42, and an electrode member 45. The electrode member 45 is slidably provided in the chute member 42 and can move from the first position to the second position under the drive of the electrode driving member 41.

[0074] The electrode member 45 includes a conductive contact portion 451 and a force-receiving portion 452 provided at both ends thereof respectively. A spring 44 is provided between the electrode member 45 and the cartridge body, and the spring 44 is used to hold the electrode member 45 in the initial first position. Before the developing cartridge is installed, the electrode member 45 is in the first position. As Figure 17 shown, in the first position, the conductive contact portion 451 may be hidden in the chute member 42.

[0075] The chute member 42 may be integrally formed with the conductive bracket 43 or may be separately installed on the side wall of the cartridge body. The bottom surface of the chute member 42 is a sliding guide surface, and the electrode member 45 is in sliding contact with the sliding guide surface. During the process of the electrode member 45 sliding in the chute member 42 under the drive of the electrode driving member 41, the sliding guide surface causes the electrode member 45 to gradually extend toward the outside of the cartridge body.

[0076] The electrode driving member 41 is provided on the side of the cartridge away from the developing roller and can move outward along the M direction towards the outside of the cartridge, and the M direction can be parallel to the length direction of the developing roller. The electrode driving member 41 has an abutting inclined surface 411, and the force-receiving portion 452 of the electrode member 45 is correspondingly formed as an inclined surface matching the abutting inclined surface 411. When the electrode driving member 41 moves outward along the M direction towards the outside of the cartridge, through the cooperation between the abutting inclined surface 411 and the force-receiving portion 452, the electrode member 45 can be driven to slide within the chute member 42 and move from the first position to the second position.

[0077] A linkage mechanism may be provided on the developing cartridge. The linkage mechanism may include a handle member and a movable member as described in Embodiment 1. The electrode driving member 41 may be provided on the movable member or formed as a part of the movable member. During the installation process, the electrophotographic imaging device acts on the linkage mechanism to move the electrode driving member 41 outward along the M direction towards the outside of the cartridge. During this process, the electrode driving member 41 drives the electrode member 45 to slide within the chute member 42 in a direction away from the electrode driving member 41 and move from the first position to the second position. As Figure 18 shown, when the electrode member 45 moves to the second position, the conductive contact portion 451 protrudes outside the conductive support 43, so that it can contact the power supply electrode in the electrophotographic imaging device and form an electrical connection.

[0078] Example 5

[0079] As Figure 19 shown, in the developing cartridge of Embodiment 5, the electrode member 55 is connected to the electrode driving member 51 and can move from the first position to the second position under the drive of the electrode driving member 51.

[0080] One end of the electrode member 55 forms a conductive contact portion 551, and the other end of the electrode member 55 is a swing end 552 serving as a force-receiving portion. The swing end 552 is rotatably connected to the electrode driving member 51. The electrode member 55 is provided with a first through hole 553 and a second through hole 554. The first through hole 553 is opened in the middle of the electrode member 55, and the second through hole 554 is opened at a position close to the conductive contact portion 551.

[0081] A guide shaft (not shown in the figure) is provided on the side wall of the cartridge. The guide shaft passes through the first through hole 553, and the axis of the guide shaft is perpendicular to the plane where the side wall of the cartridge is located. The inner side of the conductive support 53 has an inclined sliding shaft 531. The sliding shaft 531 passes through the second through hole 554. One end of the sliding shaft 531 is connected to the inner wall of the conductive support 53, and the other end is connected to the side wall of the cartridge; an inclination angle is formed between the axis of the sliding shaft 531 and the plane where the side wall of the cartridge is located. As Figure 19As shown, when the electrode member 55 is in the first position, the conductive contact portion 551 basically does not protrude beyond the outer side of the conductive support 53.

[0082] A linkage mechanism may be provided on the developing cartridge. The linkage mechanism may include a handle member and a movable member as described in Embodiment 1, and the electrode driving member 51 is rotatably provided on the movable member. During the installation process, driven by the linkage mechanism, the electrode driving member 51 moves toward the outer side of the cartridge body. When the electrode driving member 51 moves outward, guided by the sliding shaft 531 and the guiding shaft, the electrode member 55 will move toward the outer side of the cartridge body, and at the same time, the swing end 552 swings by a certain angle, thereby driving the electrode driving member 51 to rotate. After the electrode driving member 51 moves to a predetermined position, the electrode member 55 slides along the sliding shaft 531 to the second position. As Figure 20 shown, in the second position, the conductive contact portion 551 protrudes beyond the outer side of the conductive support 53, so that it can contact the power supply electrode in the electrophotographic imaging device and form an electrical connection.

[0083] It should be noted that some contents in the above different embodiments may be the same. For the sake of simplicity, the descriptions that are the same as those in other embodiments are omitted in some embodiments. Therefore, the disclosure of a certain embodiment can be understood by referring to or combining the corresponding descriptions of other embodiments.

[0084] Although the present invention is disclosed above with specific embodiments, it is not intended to limit the scope of implementation of the present invention. Any person of ordinary skill in the art can make some changes or substitutions without departing from the scope of the present invention. That is, all equivalent changes made in accordance with the present invention should be covered by the protection scope of the present invention.

Claims

1. A developing cartridge, comprising a cartridge body, a developing roller, an electrode member electrically connected to the developing roller, and an electrode driving member for directly or indirectly driving the electrode member to move; wherein: The electrode member is movably disposed on the cartridge body and includes a conductive contact portion and a force-receiving portion; the force-receiving portion is configured to receive a force that moves the electrode member from a first position to a second position, and the conductive contact portion protrudes more from the outside of the cartridge body at the second position than at the first position; A linkage mechanism is provided on the developing cartridge, the linkage mechanism includes a handle member and a movable member, and the electrode driving member is disposed on the movable member or forms a part of the movable member; The handle member is rotatably connected to the cartridge body, the movable member is capable of moving in the longitudinal direction of the developing roller, and the movement of the movable member is associated with the rotation of the handle member; When the movable member extends outward from the cartridge body as the handle member rotates, the electrode driving member drives the electrode member from the first position to the second position.

2. The developing cartridge according to claim 1, wherein, A pushing member is provided between the electrode driving member and the electrode member, a first end portion of the pushing member abuts against the electrode driving member, and a second end portion of the pushing member abuts against the force-receiving portion of the electrode member; the electrode driving member can drive the electrode member from the first position to the second position through the pushing member.

3. The developing cartridge according to claim 2, further comprising: A rotating shaft, and the electrode member has a connecting portion rotatably sleeved on the rotating shaft; A chute, which is inclined relative to the side wall of the cartridge body; the electrode member is disposed in the chute, and the chute is configured to guide the electrode member to slide outward from the cartridge body in the chute during the process that the electrode member is pushed by the pushing member to rotate around the rotating shaft.

4. The developing cartridge according to claim 3, wherein, The first end portion of the pushing member is provided with a first abutting inclined surface, the electrode driving member is provided with a guiding groove, the guiding groove has a second abutting inclined surface, and the second abutting inclined surface is in sliding contact with the first abutting inclined surface; when the electrode driving member moves outward from the cartridge body, the pushing member moves toward the electrode member and forces the electrode member to rotate around the rotating shaft and move outward along the chute, so that the electrode member moves from the first position to the second position.

5. The developing cartridge according to claim 2 further comprises: A spring, which is configured to apply an elastic force to the electrode member to hold the electrode member at the first position.

6. The developing cartridge according to claim 1; wherein: The electrode member is slidably disposed in a chute member, and the conductive contact portion and the force-receiving portion are respectively disposed at two ends of the electrode member; The electrode driving member has an abutting inclined surface, and the force-receiving portion is formed as an inclined surface matching the abutting inclined surface; when the electrode driving member moves outward from the cartridge body, through the cooperation between the abutting inclined surface and the force-receiving portion, the electrode driving member drives the electrode member to slide in the chute member and move from the first position to the second position.

7. The developing cartridge according to claim 6, wherein, The bottom surface of the chute member is a sliding guide surface, and the electrode member is in sliding contact with the sliding guide surface. During the process that the electrode member slides in the chute member under the drive of the electrode driving member, the sliding guide surface causes the electrode member to gradually extend outward toward the outside of the cartridge body.

8. The developing cartridge according to claim 6, wherein, A spring is provided between the electrode member and the cartridge body, and the spring is used to hold the electrode member at the first position.

9. The developing cartridge according to claim 1, wherein, One end of the electrode member forms the conductive contact portion, and the other end of the electrode member is a swing end serving as the force-receiving portion. The swing end is rotatably connected to the electrode driving member, and the electrode driving member is rotatably provided on the movable member; When the electrode driving member moves toward the outside of the cartridge body, the electrode member will move toward the outside of the cartridge body to move from the first position to the second position.

10. The developing cartridge according to claim 9, further comprising: A conductive bracket is provided on the side wall of the cartridge body, and the conductive bracket rotatably supports one of the longitudinal ends of the developing roller; A sliding shaft is provided inside the conductive bracket, and an inclination angle is formed between the axis of the sliding shaft and the plane where the side wall of the cartridge body is located; A guide shaft, the axis of the guide shaft is perpendicular to the plane where the side wall of the cartridge body is located; Wherein, a first through hole and a second through hole are formed in the electrode member, and the guide shaft is arranged to pass through the first through hole, and the sliding shaft is arranged to pass through the second through hole.

Images