CN113093494B

CN113093494B - Developing box

Info

Publication number: CN113093494B
Application number: CN202110431767.XA
Authority: CN
Inventors: 范文燚; 丁文奕; 谭武刚
Original assignee: Zhuhai Un Tern Imaging Products Co ltd
Current assignee: Zhuhai Un Tern Imaging Products Co ltd
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2022-12-13
Anticipated expiration: 2041-04-21
Also published as: CN113093494A; CN115755549A

Abstract

The invention discloses a developing box, which comprises a box body, a developing roller and an electrode component electrically connected with the developing roller, wherein the developing roller is rotatably supported on the box body; the electrode component is movably arranged on the box body and comprises a conductive contact part and a stress part; the force-bearing part is used for receiving acting force for moving the electrode component from the first position to the second position, and the conductive contact part protrudes out of the box body more at the second position than at the first position. The developing cartridge of the present invention, the conductive contact portion of the electrode member can form a stable and reliable electrical connection with the power feeding electrode in the electrophotographic image forming apparatus even under long-term use, and is not easily damaged.

Description

Developing box

Technical Field

The present invention relates to a developing cartridge for an electrophotographic image forming apparatus.

Background

The developing cartridge is generally detachably mounted to an electrophotographic image forming apparatus such as a laser printer, a copying machine, a facsimile machine, or the like. After the developing cartridge is mounted to the electrophotographic image forming apparatus, the electrode member provided on the developing cartridge is electrically connected to the power supply electrode on the electrophotographic image forming apparatus, so that the electrophotographic image forming apparatus supplies power to the developing cartridge, and further, to the developing roller, the powder feed roller, and the layer thickness regulating member in the developing cartridge.

In a conventional process cartridge, an elastically movable spring is provided as an electrode member, and after a developing cartridge is mounted, the electrode member is pressed by a power supply electrode in an electrophotographic image forming apparatus and is electrically connected to the power supply electrode, thereby supplying power to the developing cartridge by the electrophotographic image forming apparatus. In such a developing cartridge, the conductive contact portion of the electrode member is located at a more protruding position before the mounting than after the mounting, and there is a risk of being easily damaged (for example, being easily damaged by collision with another object). In addition, during the process of mounting and dismounting the developing cartridge, the conductive contact part of the electrode member and the power supply electrode in the electrophotographic image forming apparatus may form a large frictional force, and abrasion may be easily generated to cause poor conduction.

Disclosure of Invention

A main object of the present invention is to provide a developing cartridge in which a conductive contact portion of an electrode member is not easily damaged and which is capable of forming a stable and reliable electrical connection with an electrophotographic image forming apparatus even under long-term use.

In order to achieve the above-mentioned primary object, the present invention provides a developing cartridge including a cartridge body, a developing roller and an electrode member electrically connected to the developing roller, the developing roller being rotatably supported on the cartridge body; the electrode component is movably arranged on the box body and comprises a conductive contact part and a stress part; the force-bearing part is used for receiving acting force for moving the electrode component from the first position to the second position, and the conductive contact part protrudes out of the box body more at the second position than at the first position.

According to an embodiment of the present invention, the electrode member is rotatably provided on the case and is rotatable from a first position to a second position; the axis of rotation of the electrode member is disposed between the force receiving portion and the conductive contact portion.

According to another embodiment of the invention, the electrode member is slidably disposed on the cartridge body and is slidable from a first position to a second position.

Further, when the electrode member is slidably disposed on the cartridge body, the conductive contact portion is farther away from the developing roller at the second position than at the first position.

Further, the cartridge body has a slide guide surface in sliding contact with the electrode member, the slide guide surface gradually inclining toward an outside of the cartridge body in a sliding direction in which the electrode member slides from the first position to the second position.

According to an embodiment of the invention, an elastic element is provided between the electrode member and the cartridge body for applying an elastic force for holding the electrode member in the first position.

According to one embodiment of the invention, the electrode member is movably arranged on one of the longitudinal side walls of the cartridge.

Further, the cartridge body includes a conductive bracket provided on the longitudinal side wall, the conductive bracket rotatably supporting one of 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.

Further, an accommodation recess is formed on the conductive holder, and the electrode member is disposed in the accommodation recess.

In some embodiments of the invention, the cartridge may be provided with an electrode driving means for directly or indirectly driving the electrode means from the first position to the second position.

In the present invention, when the developing cartridge is not mounted to a predetermined mounting position in the electrophotographic image forming apparatus, the conductive contact portion of the electrode member is located at an initial first position; when the developing box is installed on the electronic photographic imaging device, the electrode component moves from the initial first position to the second position, the conductive contact part correspondingly moves towards the outer side of the box body and protrudes out of the box body, so that the conductive contact part is electrically connected with the power supply electrode on the electronic photographic imaging device, and the power supply of the electronic photographic imaging device to the developing box is realized.

The developing cartridge of the present invention has at least the following advantages: firstly, compared with the situation after the installation, the conductive contact part of the electrode component is positioned at a position which is recessed towards the inner side of the box body before the installation, so that the conductive contact part is not easy to be damaged; secondly, the electrode component makes the conductive contact part contact with the power supply electrode by stress, so that the electrical connection between the electrode component and the power supply electrode has better reliability; further, the conductive contact portion is in contact with the power supply electrode only when the developing cartridge is mounted in place, and the conductive contact portion substantially does not rub against the power supply electrode of the electrophotographic image forming apparatus during the process of mounting and dismounting the developing cartridge, so that abrasion between the conductive contact portion and the power supply electrode is avoided or reduced, and the developing cartridge can be stably electrically connected with the electrophotographic image forming apparatus even after long-term use.

To more clearly illustrate the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and detailed description.

Drawings

Fig. 1 is a first perspective view of a developing cartridge of embodiment 1 of the invention;

fig. 2 is a structural view of a second end portion of embodiment 1 of the developing cartridge of the present invention, in which an electrode member is in a disassembled state;

FIG. 3 is a perspective view showing the construction of an electrode member in embodiment 1 of the developing cartridge of the invention;

fig. 4 is a front view of a conductive holder portion in embodiment 1 of the developing cartridge of the present invention;

FIG. 5 isbase:Sub>A sectional view taken along line A-A of FIG. 4, showingbase:Sub>A change in the position of the conductive contact portions before and after the cartridge is mounted in place;

fig. 6 is a second perspective view of embodiment 1 of the developing cartridge of the present invention, in which the movable member is at its initial position;

fig. 7 is an exploded view of embodiment 1 of the developing cartridge of the present invention;

fig. 8 is a third perspective view of embodiment 1 of the developing cartridge of the present invention, in which the movable member is in its extended position;

fig. 9 is a transverse sectional view of embodiment 1 of the developing cartridge of the invention;

fig. 10 is a perspective view of embodiment 2 of the developing cartridge of the invention;

fig. 11 is a structural view of a second end portion of embodiment 2 of the developing cartridge of the invention, in which an electrode member is in a disassembled state;

fig. 12 is a front view of a conductive holder portion in embodiment 2 of the developing cartridge of the present invention;

fig. 13 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 12, in which the change in the position of the conductive contact portion is shown before and after the developing cartridge is mounted in place;

fig. 14 is a structural view of the electrode member and the electrode driving member portion in embodiment 3 of the developing cartridge of the present invention, in which the electrode member is in the first position;

fig. 15 is an exploded perspective view of the electrode member and the electrode driving member in embodiment 3 of the developing cartridge of the present invention;

FIG. 16 is a structural view of the electrode member and the electrode driving member portion in embodiment 3 of the developing cartridge of the invention, in which the electrode member is in the second position;

fig. 17 is a structural view of the electrode member and the electrode driving member portion in embodiment 4 of the developing cartridge of the present invention, in which the electrode member is at a first position;

fig. 18 is a structural view of the electrode member and the electrode driving member portion in embodiment 4 of the developing cartridge of the present invention, in which the electrode member is at the second position;

FIG. 19 is a structural view of the electrode member and the electrode driving member portion in example 5 of the developing cartridge of the present invention, in which the electrode member is at the first position;

fig. 20 is a structural view of the electrode member and the electrode driving member portion in embodiment 5 of the developing cartridge of the present invention, in which the electrode member is in the second position.

Detailed Description

Example 1

As shown in fig. 1, the developing cartridge of embodiment 1 includes a cartridge body 11 and a developing roller 12, and 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 capable of receiving a rotational driving force from the electrophotographic image forming apparatus 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, and one longitudinal end portion of the developing roller 12 is rotatably supported on the conductive bracket 13 and is electrically connected to the conductive bracket 13.

The conductive holder 13 has an accommodation recess 131. The developing cartridge further includes an electrode member 15 provided in the accommodating recess 131, and after the developing cartridge is mounted, the electrode member 15 is capable of establishing electrical connection with a power supply electrode in the electrophotographic image forming apparatus, so that the electrophotographic image forming apparatus can supply a developing bias to the developing roller 12 through the electrode member 15 and the conductive bracket 13.

The electrode member 15 is rotatably disposed in the accommodation recess 131. As shown in fig. 2 to 3, a rotation shaft 132 is provided in the accommodation recess 131, and the rotation shaft 132 is provided at a substantially middle position in the length direction of the accommodation recess 131 and 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 being provided at opposite ends of the electrode member 15, respectively, and the conductive contact portion 151 being closer to the developing roller 12 than the force receiving portion 152; the pivot hole 153 is provided at a substantially middle position in the length direction of the electrode member 15. The pivot hole 153 has two elastic latch arms 154 disposed opposite to each other on the inner side thereof, and an opening portion is formed between the two elastic latch arms 154.

When the electrode member 15 is assembled to the accommodating recess 131, the rotation shaft 132 enters the pivot hole 153 through an opening portion between two elastic catching arms 154, so that the electrode member 15 is rotatably connected to the rotation shaft 132, and the elastic catching arms 154 serve to prevent the electrode member 15 from being detached from the rotation shaft 132. The electrode member 15 is rotatable about the rotation axis 132 between an initial first position and a second position, and the rotation axis of the electrode member 15 is located between the conductive contact portion 151 and the force receiving portion 152.

A spring 14 as an example of an elastic element is provided between the electrode member 15 and the case 11, and the spring 14 is used to apply an elastic force that will hold the electrode member 15 in the first position. The spring 14 may be disposed in the accommodating recess 13 on a side away from the developing roller 12 in the accommodating recess 131. A hollow cavity 155 is arranged on the inner side of the force receiving part 152, and a columnar protrusion 156 is arranged in the hollow cavity 155; the outer end of the spring 14 is sleeved on the columnar projection 156, and the inner end is abutted against the box body 11. When the developing cartridge is not mounted to a predetermined mounting position in the electrophotographic image forming apparatus, the spring 14 applies an elastic force to the force receiving portion 152 of the electrode member 15 toward the outside of the cartridge body 11 to hold the electrode member 15 at its initial first position at which the conductive contact portion 151 can be retracted in the accommodating recess 131.

Fig. 4 is a front view of a portion of the conductive holder 13 in embodiment 1 of the developing cartridge; fig. 5 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 4, in which the position change of the conductive contact portion 151 is shown before and after the developing cartridge is mounted in place. As shown in fig. 5, when the developing cartridge is not mounted to the predetermined mounting position in the electrophotographic image forming apparatus, the conductive contact portion 151 of the electrode member 15 is in its initial first position 151a by the elastic force of the spring 14, and the conductive contact portion 151 is retracted in the accommodating recess 131 in the first position 151 a. Thus, the conductive contact 151 does not substantially rub against the power feeding electrode in the electrophotographic image forming apparatus during mounting of the developing cartridge (before mounting in place).

After the developing cartridge is mounted to a predetermined mounting position in the electrophotographic image forming apparatus, a corresponding force application portion (not shown in the drawings) in the electrophotographic image forming apparatus will apply a force F1 toward the inside of the case body 11 to the force receiving portion 152 of the electrode member 15, so that the electrode member 15 rotates about the rotary shaft 132 in the R1 direction from the first position to the second position against the elastic force of the spring 14; accordingly, the force receiving portion 152 rotates toward the inside of the case 11, the conductive contact portion 151 rotates toward the outside of the case 11 from the first position 151a to the second position 151b, and the conductive contact portion 151 protrudes more outside of the case 11 than the first position 151a at the second position 151b, thereby being able to contact and form an electrical connection with the power feeding electrode in the electrophotographic image forming apparatus. In other words, in embodiment 1, the second position 151b of the conductive contact portion 151 is located outside the first position 151a in the longitudinal direction L of the developing roller 12.

When the developing cartridge is removed from the electrophotographic image forming apparatus, as the developing cartridge leaves the predetermined mounting position, the force receiving portion 152 of the electrode member 15 is separated from the force applying portion on the electrophotographic image forming apparatus, and the conductive contact portion 151 of the electrode member 15 is returned from the second position 151b to the initial first position 151a by the spring 14, so that substantially no friction is also generated between the conductive contact portion 151 and the power feeding electrode during the dismounting process.

To facilitate the mounting and dismounting operations of the developing cartridge, as shown in fig. 6, a handle member 17 is provided on a side of the cartridge body 11 remote from the developing roller 12, and the handle member 17 is located at a substantially middle position of the cartridge body 11 in the longitudinal direction of the developing roller 12. The handle member 17 may be rotatably coupled to the case 11. As shown in fig. 7, one side of the box body 11 away from the developing roller 12 is provided with a concave part 111, and two opposite sides of the concave part 111 in the length direction of the developing roller 12 are respectively provided with a pivot hole 112; the handle member 17 has a handle pivot shaft (not visible) rotatably disposed within the pivot hole 112. The grip member 17 is rotatable about a grip rotation shaft, and the rotation axis of the grip member 17 may be parallel to the developing roller 12.

A rotation guide mechanism may be provided between the handle member 17 and the case 11 so that the rotation process of the handle member 17 is more stable. For example, as shown in fig. 7, the handle member 17 is provided with a guide projection 172 on each of opposite sides thereof, the recess 111 is provided with an arc-shaped guide portion 113 on each of opposite sides thereof, and the guide projection 172 is carried on the arc-shaped guide portion 113. When the handle member 17 is rotated, the guide projection 172 slides along the arc-shaped guide portion 113.

As shown in fig. 6 and 7, the cartridge body 11 is further provided with two movable members 18, and the two movable members 18 are disposed substantially symmetrically on opposite sides of the grip member 17 in the longitudinal direction of the developing roller 12. The movable member 18 includes a connecting portion 181 and a rod portion 182, which are integrally formed or fixedly connected, and the case 11 has a through-type guide hole 114, and the rod portion 182 is inserted into the guide hole 114.

The movable member 18 is movable in the longitudinal 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, the handle member 17 is provided with one sliding groove 171 on each of opposite sides thereof, and the sliding grooves 171 are inclined with respect to the longitudinal direction of the developing roller 12. The connecting portion 181 is provided with a sliding protrusion 1811, and the sliding protrusion 1811 is disposed in the sliding groove 171. Movement of the handle member 17 is linked to movement of the movable member 18 by cooperation between the slide groove 171 and the slide protrusion 1811.

The grip member 17 is rotatable between an initial position as shown in fig. 6 and an abutment position as shown in fig. 8. As shown in fig. 6, when the handle member 17 is in its initial position, the lever portion 182 is also in its initial position, in which the lever portion 182 is retracted into the case 11 (i.e., does not extend from the longitudinal end of the case 11). Before the developing cartridge machine, the handle member 17 and the movable member 18 are in their initial positions. As shown in fig. 7, the connecting portion 181 is provided with an elastic catch 1812, the case 11 is provided with a catching groove 115, and a catching convex portion of the elastic catch 1812 can be inserted into the catching groove 115 to hold the handle member 17 and the movable member 18 at their initial positions. As shown in fig. 8, when the handle member 17 is rotated from the initial position to the abutment position, the movable member 18 is moved to the extended position toward the outside of the cartridge body 11 in the longitudinal direction of the developing roller 12, at which the tip end of the lever portion 182 is extended from the inside of the guide hole 114 to the cartridge body 11.

Referring to fig. 9, the developing cartridge can be mounted to the electrophotographic image forming apparatus in the X direction, and during mounting, another corresponding urging portion in the electrophotographic image forming apparatus will abut against the handle member 17 to apply an urging force to the handle member 17, so that the handle member 17 is rotated in the R2 direction from its initial position to the abutment position, and the movable member 18 is correspondingly moved from its initial position to the extended position. At this time, the tip of the lever portion 182 protrudes from the longitudinal end of the cartridge body 11 and can cooperate with a separation/contact mechanism in the electrophotographic image forming apparatus to separate or contact the developing roller 12 from the photosensitive drum.

Example 2

As shown in fig. 10, the developing cartridge of embodiment 2 includes a cartridge body 21 and a developing roller 22, and the developing roller 22 is rotatably supported at a first end 21a and a second end 21b of the cartridge body 21. The second end portion 21b has a side wall 26 and a conductive bracket 23 mounted on the side wall 26, and one end portion of the developing roller 22 is rotatably supported on the conductive bracket 23 and is electrically connected to the conductive bracket 23.

The conductive holder 23 has an accommodation recess 231. An electrode member 25 is provided in the accommodating recess 231, and after the developing cartridge is mounted, the electrode member 25 can establish electrical connection with a power supply electrode in the electrophotographic image forming apparatus, so that the electrophotographic image forming apparatus can supply a developing bias to the developing roller 22 through the electrode member 25 and the conductive bracket 23.

The electrode member 25 is slidably disposed within the accommodation recess 231 and is slidable between an initial first position and a second position. As shown in fig. 11, the electrode member 25 includes a conductive contact portion 251 and a force receiving portion 252, the conductive contact portion 251 being provided at an end of the electrode member 25 close to the developing roller 12, and the force receiving portion 252 being provided at a substantially middle position in a longitudinal direction of the electrode member 25. The conductive bracket 23 is provided with a stopping part 232, and the electrode member 25 is provided with a stopped part 253. When the electrode member 25 is in the first position, the blocking portion 232 abuts against the blocked portion 253.

A spring 24 as an example of an elastic member is further provided in the accommodating recess 231, and the spring 24 is connected to an end of the electrode member 25 remote from the developing roller 12 for applying an elastic force to the electrode member 25. When the developing cartridge is not mounted to the predetermined mounting position in the electrophotographic image forming apparatus, the stopper 232 abuts against the stopped portion 253 under urging of the spring 24, holding the electrode member 25 at its initial first position.

Fig. 12 is a front view of a part of the conductive holder 23 in embodiment 2; fig. 13 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 12, in which the positional change of the conductive contact portion 251 is shown before and after the developing cartridge is mounted in place. As shown in fig. 13, when the developing cartridge is not mounted to a predetermined mounting position in the electrophotographic image forming apparatus, the conductive contact portion 251 is located at its initial first position 251a; after the developing cartridge is mounted to a predetermined mounting position in the electrophotographic image forming apparatus, a corresponding urging portion (not shown) in the electrophotographic image forming apparatus applies an urging force F2 to the force receiving portion 252 of the electrode member 25, so that the electrode member 25 slides in a direction away from the developing roller 12 to a second position against the urging force of the spring 24, and the conductive contact portion 251 moves from the first position 251a to the second position 251b, respectively.

As shown in fig. 13, the electrode member 25 is in sliding contact with the bottom surface 233 of the accommodation recess 231, and the bottom surface 233 constitutes a slide guide surface of the electrode member 25. The bottom surface 233 is gradually inclined toward the outside of the case 11 in the sliding direction (the direction of the force F2 in fig. 13) in which the electrode member 25 slides from the first position to the second position, so that the conductive contact portion 251 is gradually more protruded outside the case 21 as the electrode member 25 slides from the first position to the second position along the bottom surface 233. That is, the second position 251b of the conductive contact portion 251 is outside the first position 251a in the longitudinal direction L of the developing roller 22. In the second position 251b, the more protruding conductive contact portion 251 can contact and form an electrical connection with a power feeding electrode in the electrophotographic image forming apparatus.

The conductive contact portion 251 in the first position 251a does not substantially rub or rub only slightly against the power feeding electrode in the electrophotographic image forming apparatus because the force receiving portion 252 does not contact the force applying portion in the electrophotographic image forming apparatus before the developing cartridge is mounted in place. When the developing cartridge is removed from the electrophotographic image forming apparatus, as the developing cartridge leaves the predetermined mounting position, the force receiving portion 251 of the electrode member 25 is separated from the force applying portion on the electrophotographic image forming apparatus, and the conductive contact portion 251 of the electrode member 25 is returned from the second position 251b to the initial first position 251a by the spring 24, so that substantially no friction or only slight friction is also generated between the electrical contact portion 251 and the power supply electrode during the dismounting process.

It should be noted that in the above embodiments 1 and 2, the electrode member may be disposed at other positions of the cartridge, such as the first end portion of the cartridge, or the non-conductive bracket portion disposed on the side wall of the second end portion of the cartridge, and electrically connected to the developing roller through the intermediate conductive member.

Example 3

As shown in fig. 14 and 15, the developing cartridge of embodiment 3 further comprises an electrode driving member 31 and a pushing member 32, the pushing member 32 being disposed between the electrode driving member 31 and the electrode member 35, the electrode driving member 31 being capable of urging the electrode member 35 from the first position to the second position by the pushing member 32.

The electrode member 35 has a U-shaped conductive contact portion 351, a connection portion 352, and a force receiving portion 353, the force receiving portion 353 being located between the conductive contact portion 351 and the connection portion 352. The conductive frame 33 has a rotating shaft 331 on the inner side thereof, and the connecting portion 352 is rotatably disposed on the rotating shaft 331, so that the electrode member 35 can rotate around the rotating shaft 331. Meanwhile, the inner side of the conductive bracket 33 further has a slide groove 332 disposed obliquely with respect to the sidewall of the case, and the electrode member 35 is disposed in the slide groove 332. The slide groove 332 is configured to guide the electrode member 35 to slide toward the outside of the case within the slide groove 332 during the rotation of the electrode member 35 around the rotation shaft 331 pushed by the pushing member 32.

A spring 34 is connected between the conductive holder 33 and the electrode member 35, and the spring 34 is used to apply an elastic force to the electrode member 35 to hold the electrode member 35 at the initial first position. Before the developing cartridge machine, the electrode member 35 is in the first position. As shown in fig. 14, in the first position, the conductive contact portion 351 does not substantially protrude outside the conductive holder 33.

The electrode driving member 31 is disposed at a side of the cartridge body away from the developing roller and is movable toward an outside of the cartridge body in an M direction, which may be parallel to a lengthwise direction of the developing roller. The first end 321 of the pushing member 32 is in contact with the electrode driving member 31, and the second end 322 is in contact with the force receiving portion 353 of the electrode member 35. As shown in fig. 15, the first end 321 of the pushing member 32 is provided with a first abutting inclined surface 3211, the electrode driving member 31 is provided with a guide groove 312, the guide groove 312 is provided with a second abutting inclined surface 311, and the second abutting inclined surface 311 is in sliding contact with the first abutting inclined surface 3211.

Thus, as shown in fig. 16, when the electrode driving member 31 moves toward the outside of the case in the direction M, the pushing member 32 will move toward the electrode member 35 and urge the electrode member 35 to rotate about the rotating shaft 331 and move toward the outside of the case along the sliding slot 332, moving the electrode member 35 from the initial first position to the second position. In the second position, the conductive contact portion 351 protrudes outside the conductive holder 33.

The developing cartridge may be provided with a link mechanism, which may include a handle member and a movable member as described in embodiment 1, and the electrode driving member 31 may be provided on or formed as a part of the movable member. During the mounting process, the electrophotographic image forming apparatus acts on the link mechanism to move the electrode driving member 31 together with the movable member in the M direction toward the outside of the cartridge. In this process, the electrode driving member 31 urges the electrode member 35 to move from the first position to the second position by the urging member 32. When the electrode member 35 is moved to the second position, the conductive contact portion 351 comes into contact with and forms an electrical connection with the power feeding electrode in the electrophotographic image forming apparatus, and supplies a developing bias to the developing roller through the conductive holder 33.

As shown in fig. 16, in embodiment 3, an elastic element 36 (e.g., a spring) may be further provided between the pushing member 32 and the case, and one end of the elastic element 36 is attached to the pushing member 32 and the other end abuts against the case. The elastic element 36 may assist the pushing member 32 to push the electrode member 35 to slide from the first position to the second position.

Example 4

As shown in fig. 17, the developing cartridge of embodiment 4 includes an electrode driving member 41, a chute member 42, and an electrode member 45, and the electrode member 45 is slidably disposed within the chute member 42 and is movable from a first position to a second position by urging of the electrode driving member 41.

The electrode member 45 includes conductive contact portions 451 and force receiving portions 452 provided at both ends thereof, respectively. A spring 44 is provided between the electrode member 45 and the cartridge, the spring 44 serving to hold the electrode member 45 in an initial first position. Before the developing cartridge loader, the electrode member 45 is in the first position. As shown in fig. 17, in the first position, conductive contact 451 may be concealed within chute member 42.

The chute member 42 may be integrally formed with the conductive bracket 43 or may be separately mounted on the side wall of the case. The bottom surface of the chute member 42 is a slide guide surface with which the electrode member 45 is in slide contact, and the slide guide surface causes the electrode member 45 to gradually protrude toward the outside of the case in the process in which the electrode member 45 is urged by the electrode driving member 41 to slide within the chute member 42.

The electrode driving member 41 is disposed at a side of the cartridge body away from the developing roller and is movable toward an outside of the cartridge body in an M direction, which may be parallel to a lengthwise direction of the developing roller. The electrode driving member 41 has an abutment slope 411, and the force receiving portion 452 of the electrode member 45 is correspondingly formed as a slope matching the abutment slope 411. When the electrode driving member 41 moves toward the outside of the case in the direction M, the electrode member 45 can be driven to slide within the slide groove member 42 and move from the first position to the second position by the engagement between the abutment slope 411 and the force receiving portion 452.

The developing cartridge may be provided with a link mechanism, which may include a handle member and a movable member as described in embodiment 1, and the electrode driving member 41 may be provided on or formed as a part of the movable member. During the mounting process, the electrophotographic image forming apparatus acts on the interlocking mechanism to move the electrode driving member 41 in the M direction toward the outside of the cartridge. In this process, the electrode driving member 41 urges the electrode member 45 to slide in the chute member 42 in a direction away from the electrode driving member 41, and moves from the first position to the second position. As shown in fig. 18, when the electrode member 45 is moved to the second position, the conductive contact portion 451 protrudes outside the conductive holder 43 so as to be able to contact and make electrical connection with the power feeding electrode in the electrophotographic image forming apparatus.

Example 5

As shown in fig. 19, in the developing cartridge of embodiment 5, the electrode member 55 is connected to the electrode driving member 51 and can be moved from the first position to the second position by the urging of the electrode driving member 51.

One end of the electrode member 55 is formed with a conductive contact 551, and the other end of the electrode member 55 is a swinging end 552 as a force receiving portion, the swinging end 552 being rotatably connected to the electrode driving member 51. The electrode member 55 is formed with a first through hole 553 and a second through hole 554, the first through hole 553 is opened at a middle portion of the electrode member 55, and the second through hole 554 is opened at a position close to the conductive contact portion 551.

A guide shaft (not shown) is provided on the sidewall of the case, the guide shaft passes through the first through hole 553, and the axis of the guide shaft is perpendicular to the plane of the sidewall of the case. The inner side of the conductive bracket 53 has a sliding shaft 531 obliquely disposed, and the sliding shaft 531 passes through the second through hole 554. One end of the sliding shaft 531 is connected with the inner wall of the conductive bracket 53, and the other end is connected with the side wall of the box body; an inclined angle is formed between the axis of the sliding shaft 531 and the plane of the side wall of the box body. As shown in fig. 19, when the electrode member 55 is in the first position, the conductive contact 551 does not substantially protrude outside the conductive holder 53.

The developing cartridge may be provided thereon with a link mechanism, which may include a handle member and a movable member as described in embodiment 1, on which the electrode driving member 51 is rotatably provided. In the assembling process, the electrode driving member 51 is driven by the linkage mechanism to move toward the outer side of the cartridge. When the electrode driving member 51 moves outward, the electrode member 55 will move toward the outside of the case under the guidance of the sliding shaft 531 and the guiding shaft, and the swinging end 552 swings at a certain angle, so as to drive the electrode driving member 51 to rotate. When the electrode driving member 51 is moved to the predetermined position, the electrode member 55 is slid to the second position along the slide shaft 531. As shown in fig. 20, in the second position, the conductive contact 551 projects outside of the conductive support 53 so as to be able to contact and make electrical connection with the power feeding electrode in the electrophotographic image forming apparatus.

It is noted that certain aspects of the various embodiments described above may be similar, and the descriptions of some embodiments that are similar to other embodiments are omitted for brevity. Thus, the disclosure of one embodiment may be understood by reference to or in conjunction with the corresponding description of another embodiment.

Although the present invention has been described with reference to specific embodiments, it is not intended to limit the scope of the invention. It will be understood by those skilled in the art that various changes and substitutions may be made without departing from the scope of the invention, and it is intended that all changes and substitutions made herein be interpreted as equivalents.

Claims

1. A developing cartridge for an electrophotographic image forming apparatus having a force application portion therein for applying a force to a force receiving portion of an electrode member of the developing cartridge; the developing cartridge includes a cartridge body, a developing roller and an electrode member electrically connected to the developing roller, the developing roller being rotatably supported on the cartridge body; the electrode component is movably arranged on the box body and comprises a conductive contact part and a stress part; the force receiving part is used for receiving the acting force applied by the force application part, so that the electrode component rotates or slides to a second position from a first position, and the conductive contact part protrudes out of the box body at the second position than at the first position.

2. A developing cartridge according to claim 1; wherein the electrode member is rotatably provided on the case and is rotatable from the first position to the second position; the rotation axis of the electrode component is arranged between the force receiving part and the conductive contact part, and the force receiving part is used for receiving the acting force which is applied by the force application part and faces the inner side of the box body, so that the electrode component rotates from the first position to the second position.

3. A developing cartridge according to claim 1; wherein the electrode member is slidably disposed on the cartridge body and is slidable from the first position to the second position.

4. A developing cartridge according to claim 3; wherein the conductive contact portion is farther away from the developing roller at the second position than at the first position; the force receiving part is used for receiving the acting force applied by the force applying part and enabling the electrode component to slide to the second position from the first position in the direction away from the developing roller.

5. A developing cartridge according to claim 3; wherein the cartridge body has a slide guide surface that is in slide contact with the electrode member, the slide guide surface being gradually inclined toward an outside of the cartridge body in a slide direction in which the electrode member slides from the first position to the second position.

6. A developing cartridge according to claim 1; wherein an elastic element is arranged between the electrode component and the box body, and the elastic element is used for applying an elastic force for keeping the electrode component at the first position.

7. A developing cartridge according to claim 1; wherein, the electrode component is movably arranged on one of the longitudinal side walls of the box body.

8. A developing cartridge according to claim 7; wherein the cartridge body includes a conductive bracket provided on the longitudinal side wall, the conductive bracket rotatably supporting one of 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.

9. A developing cartridge according to claim 8; wherein an accommodation recess is formed on the conductive holder, and the electrode member is disposed in the accommodation recess.