CN222801001U - A developing box - Google Patents

Abstract

The utility model discloses a developing cartridge, which comprises a shell for containing developer, wherein the shell is provided with a first side and a second side which is arranged at intervals with the first side in a first direction, the shell is provided with a third side in a second direction which is intersected with the first direction, a developing roller, a powder feeding roller, a powder discharging cutter, a coupling gear, a chip, a forced pushing protrusion and an electrode, wherein the forced pushing protrusion is provided with a force receiving surface, the electrode is provided with an electric contact part which can receive electric power outside the developing cartridge and is electrically connected to at least one of the developing roller, the powder feeding roller and the powder discharging cutter, the force receiving surface is closer to the third side of the shell than the axis of the coupling gear in the second direction, and the electric contact part is arranged at intervals with the force contact surface in the second direction.

Description

Developing box

Technical Field

The utility model relates to the technical field of electrophotographic imaging, in particular to a developing box.

Technical Field

The developing cartridge is a consumable material applied to an electrophotographic image forming apparatus, and in order to improve the image forming quality of the developing cartridge, the electrophotographic image forming apparatus is required to supply power to a developing roller and a powder feeding roller in the process of image forming to improve the efficiency of the powder feeding roller and the developing roller for conveying developer.

The prior art discloses a developing cartridge provided with a bearing member made of a conductive material, which can be used to support one end of a developing roller in a length direction, the bearing member is provided with a forced pushing part, the drum cartridge is provided with a movable forced pushing part which can be contacted with the forced pushing part, and in a state that the developing cartridge is mounted to the drum cartridge, the forced pushing part applies forced pushing force to the forced pushing part to contact the developing roller with a photosensitive drum, and on the other hand, the bearing member can provide bias voltage for the developing roller through the contact of the forced pushing part and the forced pushing part. However, in the existing developing cartridge, the bearing member is made of an electrically conductive material as a whole to satisfy the need for electrical connection to the developing roller, which results in a great increase in the cost of manufacturing the bearing member and is not economical.

Disclosure of utility model

Therefore, the present utility model provides a developing cartridge for solving the above technical problems, which is mainly implemented by the following technical solutions:

A developing cartridge, comprising:

A housing for accommodating the developer, the housing having a first side and a second side spaced apart from the first side in a first direction, the housing having a third side and a fourth side spaced apart from the third side in a second direction intersecting the first direction;

A developing roller rotatable about a developing roller axis extending in a first direction, the developing roller being closer to a third side of the casing than to a fourth side of the casing in a second direction;

A toner feed roller rotatable about a toner feed roller axis extending in a first direction, the toner feed roller for conveying developer to the developing roller;

The powder outlet knife is used for controlling the thickness of the developer attached to the outer surface of the developing roller;

A coupling gear for receiving an external driving force of the developing cartridge and rotatable about a coupling gear axis extending in a first direction, the coupling gear being located at a first side of the housing in the first direction;

a chip having an electrical contact surface located on a first side of the housing in a first direction;

A forced pushing projection having a force receiving surface which can receive a force from outside the developing cartridge to keep the developing roller in contact with the photosensitive drum from outside the developing cartridge;

An electrode having an electric contact portion which can receive electric power from outside the developing cartridge and is electrically connected to at least one of the developing roller, the powder feeding roller, and the powder discharging blade;

The force receiving surface is closer to the third side of the housing than the coupling gear axis of the coupling gear in the second direction;

in the second direction, the electrical contact is spaced apart from the force receiving surface.

Further, the developing device further comprises a force bearing piece, wherein the force bearing piece can receive the external force of the developing box and move relative to the shell;

The electrical contact is movable relative to the housing in response to movement of the force-bearing member.

Further, the developing cartridge can be detachably mounted in the drum cartridge having the power supply member;

The electrical contact is movable relative to the housing from a first position to a second position;

the first position is configured as a position where the electrical contact portion is not in contact with the power feeding member, and the second position is configured as a position where the electrical contact portion is in contact with the power feeding member.

Further, the electrical contact is movable in a first direction relative to the housing.

Further, the force receiving surface electrode is located outside the projection range of the electrode, projected in the first direction.

Further, the electrical contact is exposed at the second side of the housing in the second direction, and the electrical contact is forced farther from the second side of the housing than the forced protrusion in the first direction.

Further, the developing cartridge includes a bracket for supporting the electric contact portion, the bracket being formed outwardly from the second side of the housing.

Further, the stent is "L" shaped as viewed in the second direction.

Further, in the second direction, the electrical contact is further from the fourth side of the housing than the force receiving surface.

Further, in the first direction, the electrical contact is disposed opposite the electrical contact surface.

The utility model provides a developing cartridge, by arranging an electrode and a forced pushing part into a split structure, a bearing part for supporting a developing roller and the forced pushing part formed on the bearing part can be made of non-conductive materials, and the electrode only needs to be made of conductive materials, so that compared with the prior art, the use of the conductive materials is reduced, the production and manufacturing cost is reduced, and the economy is higher.

Drawings

FIG. 1 is a schematic perspective view of a drum cartridge of the prior art at an angle;

FIG. 2 is a schematic view of a prior art drum box at another angle;

FIG. 3 is a right side schematic view of a prior art drum cartridge;

Fig. 4 is a schematic perspective view of a developing cartridge in embodiment 1 of the present utility model;

fig. 5 is a schematic perspective view of a developing cartridge according to another embodiment 1 of the present utility model;

Fig. 6 is a vertical sectional view of the developing cartridge in embodiment 1 of the present utility model;

Fig. 7 is a partially exploded view of the developing cartridge in embodiment 1 of the present utility model;

Fig. 8 is a schematic view showing the positions of the support plate and the slide bar in the first position state in embodiment 1 of the present utility model;

Fig. 9 is a schematic view showing the positions of the support plate and the slide bar in the first position state in embodiment 1 of the present utility model;

Fig. 10 is a schematic perspective view of a developing cartridge in embodiment 2 of the present utility model;

fig. 11 is a partially exploded view of the developing cartridge in embodiment 2 of the present utility model;

Fig. 12 is a schematic perspective view of a support plate in embodiment 2 of the present utility model;

fig. 13 is a schematic perspective view of the development cartridge of embodiment 2 of the present utility model in an engaged state with the drum cartridge;

FIG. 14 is a schematic view showing a developing cartridge at an angle in accordance with embodiment 3 of the present utility model;

FIG. 15 is another schematic view of the developing cartridge of embodiment 3 of the present utility model;

fig. 16 is a schematic view showing the electrode exploded from the developing cartridge in embodiment 3 of the present utility model.

Fig. 17 is a schematic view of a developing cartridge in embodiment 3 of the present utility model when a developing roller is in contact with a photosensitive drum;

FIG. 18 is a schematic view showing a developing cartridge according to embodiment 3 of the present utility model mounted in a drum cartridge at an angle;

fig. 19 is another angular schematic view of the mounting of the developing cartridge in the drum cartridge in embodiment 3 of the present utility model.

Detailed Description

In order to make the technical solution and the technical effects of the embodiments of the present utility model more clear, the technical solution of the process cartridge of the present utility model will be clearly and completely described below with reference to the accompanying drawings. It is apparent that the described embodiment is only one preferred embodiment of the present utility model, but not all embodiments, and that other embodiments, which are obtained by those skilled in the art without inventive effort, are within the scope of the present utility model based on the embodiments of the present utility model.

As shown in fig. 1 to 3, there is shown a drum cartridge 50 cooperating with a developing cartridge 100 of the present utility model, which shows an developing cartridge 100 invented, both of which can be mounted as a unit to an electrophotographic image forming apparatus (hereinafter referred to as "image forming apparatus"), the drum cartridge 50 comprising a drum frame 51, a photosensitive drum 52, a locking portion 54 and a urging portion 55, a developing cartridge accommodating portion 56 formed on the drum frame 51 for accommodating the developing cartridge 100, the photosensitive drum 52 for receiving a signal from the image forming apparatus and forming an electrostatic latent image, the photosensitive drum 52 being rotatably supported on the drum frame 51 about a photosensitive drum axis extending in a left-right direction, and a locking portion 54 provided above a left side of the drum frame 51 for locking the developing cartridge 100 inside the drum frame 51, thereby preventing the developing cartridge 100 from coming off.

The urging portion 55 is provided at the rear of the drum frame 51, and an elastic member 57 is connected between the urging portion 55 and the drum frame 52, the urging portion 55 being configured to apply a forward urging force to the developing cartridge 100 when the developing cartridge 100 is mounted to the drum cartridge 50, so that the developing roller 120 is brought into contact with the photosensitive drum 52, the urging portion 55 including a first urging portion 55a and a second urging portion 55b. The first urging portion 55a is located on the left side of the drum cartridge 50, and the second urging portion 55b is located on the right side of the drum cartridge 50.

The drum cartridge 50 further includes a power supply part, specifically, a metal conductive sheet 60 configured to be disposed on the right side of the drum frame 51, the right side of the metal conductive sheet 60 being exposed on the right side of the drum cartridge 50, the right side of the metal conductive sheet 60 being in contact with a power supply part (not shown) in the image forming apparatus to receive power from the image forming apparatus when the developing cartridge 100 is mounted to the image forming apparatus together with the drum cartridge 50, and the left side of the metal conductive sheet 60 being exposed on the inside of the drum frame 51 through one hole 51 a. Alternatively, at least a portion of the second push portion 55b may be made of a conductive material, for example, a conductive resin, and the second push portion 55b may be disposed to be electrically connected to the metal conductive sheet 60.

As shown in fig. 4-6, a developing cartridge 100 in an embodiment of the present utility model is shown, the developing cartridge 100 including a housing 110. The housing 110 includes a powder hopper 111 containing developer, the housing 110 further includes an end cap 112 detachably mounted at one side of the powder hopper 111, the end cap 112 may cover a gear train of the developing cartridge 100 including, but not limited to, a driving gear 150, a developing roller gear, a powder feeding roller gear, a stirring frame gear, and a plurality of connection gears, the driving gear 150 being located at a left end of the developing cartridge 100, the driving gear 150 being for receiving a driving force to rotate the driving gear 150 around an axis of the driving gear 150 extending in a left-right direction when the developing cartridge 100 is mounted to an image forming apparatus, the driving gear 150 being rotatable by the driving gear 150. Specifically, in the present embodiment, the driving gear 150 is engaged with the powder feeding roller gear, the powder feeding roller gear is engaged with the developing roller gear through the first connecting gear, and the driving gear 150 is engaged with the agitator frame gear through the second connecting gear 152, so that the powder feeding roller gear 121, the developing roller gear 131 and the agitator frame gear can receive the driving force of the driving gear 150 and rotate. The developing cartridge 100 further includes a developing roller 120, a toner feeding roller 130 and a stirring frame 140 supported on the casing 110, the left ends of which are respectively connected to the developing roller gear, the toner feeding roller gear and the stirring frame gear 140, the respective gears respectively drive the developing roller 120, the toner feeding roller 130 and the stirring frame 140 to rotate about axes extending in the left-right direction, the developing roller 120 and the stirring frame 140 are arranged in the front-rear direction, the developing roller 120 is disposed at the front end of the stirring frame 140 in the front-rear direction, the developing roller 120 is located at the front end of the casing 110 in the front-rear direction, the developing roller 120 of the developing cartridge 100 is brought into contact with the photosensitive drum 52 of the drum 50 by the urging portion 55 when the developing cartridge 100 is mounted to the drum 50, and the rotating stirring frame 140 stirs and conveys the developer inside the developing cartridge 100 to the toner feeding roller 130, the developing roller 130 rotates and simultaneously conveys the developer to the developing roller 120, and the developing roller 120 conveys the developer thereon to the photosensitive drum 52 by contact with the photosensitive drum 52, and the electrostatic latent image is conveyed to the photosensitive drum 52. A powder discharging knife 117 is disposed between the developing roller 120 and the housing 110, and the powder discharging knife 117 is used for controlling the thickness of the developer on the developing roller 120, so that the developer on the developing roller 120 is more uniform, and the imaging quality of the developing cartridge 100 is improved.

The developing cartridge 100 further includes a chip frame 170 and a chip 180 supported by the chip frame 170, wherein the chip frame 170 and the chip 180 are located at the left side of the housing 110, and the chip frame 170 and the chip 180 are movable relative to the housing 110 in one implementation of this embodiment, and in an alternative implementation, the chip frame 170 may be fixedly connected to one side of the housing 110, specifically, the chip frame 170 may be fixedly connected to the left side of the end cover 112 by means of elastic fasteners or screws, etc., and the chip frame 170 may also be formed by extending the chip frame 170 from the left side of the end cover 112 from right to left in a left-right direction, and the chip frame 170 may be formed by extending the chip frame 170 from the left side of the powder bin 111 from right to left in a left-right direction. The chip 180 includes an electrical contact surface 181 exposed to the top of the chip frame 170, and a storage part (not shown) in which information of the type of the developing cartridge 100 and the like is stored, the electrical contact surface 181 being connectable with electrical contacts (not shown) in the image forming apparatus in a state in which the developing cartridge 100 is mounted to the image forming apparatus, and the storage part being electrically connected with the electrical contact surface 181. When the developing cartridge 100 is mounted in the image forming apparatus, the developing cartridge 100 is electrically connected to an electrical contact point of the image forming apparatus through the electrical contact surface 181 to be able to read information in the storage portion, so that the developing cartridge 100 establishes a communication link with the image forming apparatus, thereby allowing the image forming apparatus to judge information such as a model number of the developing cartridge 100, and when the service life of the developing cartridge 100 is about to end, the image forming apparatus may prompt a user to replace the developing cartridge 100 with a new one through a display device such as an operation panel or an indication lamp.

The developing cartridge 100 further includes a separated portion and a forced pushing portion, both of which are provided at both sides of the developing cartridge 100, the separated portion being adapted to receive a force of the drum cartridge 50 or the image forming apparatus to move the developing roller 120 away from the photosensitive drum 52 after the developing cartridge 100 and the drum cartridge 50 are mounted together to the image forming apparatus, and the forced pushing portion being adapted to receive a force of the forced pushing portion 55 in the drum cartridge 50 to keep the developing roller 120 in contact with the photosensitive drum 52. The separated portion includes a first separated portion 113a located at the left side of the developing cartridge 100 and a second separated portion 113b located at the right side of the developing cartridge 100, the forced pushing portion includes a first forced pushing portion 114a located at the left side of the developing cartridge 100 and a second forced pushing portion 114b located at the right side of the developing cartridge 100, the first separated portion 113a is closer to the developing roller 120 than the first forced pushing portion 114a in the front-rear direction, the second separated portion 113b is farther than the driving gear 150 than the second forced pushing portion 114b, and projections of the first forced pushing portion 114a and the second forced pushing portion 114b in the left-right direction overlap at least partially. The right side of the housing 110 is provided with a supporting plate 115 rotatably supporting the developing roller 120 and the powder feeding roller 130, a first separating portion 113a and a first forced pushing portion 114a are configured as protrusions formed to extend outwardly in the left-right direction from the left side of the end cap 112, a second separating portion 113b is configured as a lever receiving an external force and driving the developing roller 120 away from the photosensitive drum 52, a second forced pushing portion 114b is configured as protrusions extending outwardly in the left-right direction from the right side of the supporting plate 115, the supporting plate 115 and the second forced pushing portion 114b are made of an insulating material, and preferably, the supporting plate 115 and the second forced pushing portion 114b are made of ABS plastic material.

As shown in fig. 7 to 9, in order to achieve the electrical connection of the developing roller 120 and the powder feeding roller 130 in the developing cartridge 100 with the drum cartridge 50, the developing cartridge 100 includes a connection member 160 for achieving the electrical connection, the connection member 160 being located between the developing roller 120 and the electrical contact surface 181 in the front-rear direction, and the connection member 160 being disposed on the left and right sides of the casing 110 opposite to the electrical contact surface 181 in the left-right direction, the connection member 160 being located on the right side of the casing 110; in performing an image forming operation, the connection member 160 may be connected with the metal conductive sheet 60 to receive electric power directed to the metal sheet 60 and to supply electric power to at least one of the developing roller 120, the powder feeding roller 130 and the powder discharging blade 117, and in particular, the connection member 160 penetrates to the left side of the support plate 115, the connection member 160 includes a slide bar 161, an elastic portion 162, a driving portion 163 and an electric connection portion 164, the slide bar 161 and the elastic member 162 being located in a through hole 115a penetrating the support plate 115, the slide bar 161 being contactable with a power supply member external to the developing cartridge 100 to receive electric power external to the developing cartridge 100, in this embodiment, the slide bar 161 being an electric contact portion, the slide bar 161 being located between the second forced pushing portion 114b and a rotation axis of the developing roller 120 in a front-rear direction, the second forced pushing portion 114b being disposed at a distance from a force receiving surface of the second forced pushing portion 114b in the front-rear direction, that is closer to the developing roller 120 than a rotation axis of the driving gear 150, that is, the slide bar 161 being closer to the support plate 115 than the rotation axis of the driving gear 150 in the front-rear direction, that is, the slide bar 161 being closer to the developing roller 115 than the rotation axis of the driving gear 150 is to the rotation axis of the developing roller 115, the slide bar 161 being connected to the slide bar 161 being in a state between the elastic member and the support plate 115, and the slide bar 161 being maintained at a position between the slide bar 115 and the elastic member and the slide bar 115, the elastic member 162 is preferably provided as a compression spring, the driving portion 163 is provided to receive an external force to push the sliding bar 161 to move from a first position, which is provided as a retracted position of the sliding bar 161 to avoid interference of the sliding bar 161 with the detachment and attachment of the developing cartridge 100 to and from the drum cartridge 50, to a second position, which is provided as an extended position of the sliding bar 161, at which time the sliding bar 161 may contact and establish an electrical connection with the metal conductive sheet 60. The electric connection portion 164 is for electrically connecting the slide lever 161 with at least one of the developing roller 120, the toner feeding roller 130, and the toner discharging blade 117, and in the present embodiment, the electric connection portion 164 is for electrically connecting the slide lever 161 with the developing roller 120 and the toner feeding roller 130, thereby transmitting electric power to the developing roller 120 and the toner feeding roller 130. The electric connection portion 164 and the slide rod 161 are made of an electrically conductive material, and preferably the electric connection portion 164 and the slide rod 161 are made of a metal material.

As will be described in detail below, the developing cartridge 100 and the drum cartridge 50 are electrically connected, the force receiving surface 163a on the side of the driving portion 163 which is away from the sliding lever 161 in the front-rear direction abuts against the inner wall 51b of the drum frame 51 and pushes the driving portion 163 to move toward the side close to the sliding lever 161 in the front-rear direction, the side of the driving portion 163 which is close to the sliding lever 161 in the front-rear direction is configured to be a right-front inclined surface 163b, the inclined surface 163b is in contact with one end of the sliding lever 161 which is close to the casing 110 and pushes the sliding lever 161 to move rightward in the left-right direction during the movement of the sliding lever 161, and the sliding lever 161 is moved from the first position to the second position which is farther from the casing 110 than the first position, and at this time, the movement of the sliding lever 161 away from the casing 110 contacts with the metal conductive sheet 60, so that the developing roller 120 and the powder feeding roller 130 in the developing cartridge 100 are electrically connected to the metal conductive sheet 60 through the electrical connection portion 164 and the sliding lever 161, so that the developing roller 120 and the metal conductive sheet 60 of the developing device can receive the image forming apparatus and the developing roller 130 can receive the electric power, and the developing device can stably transfer the developing agent 100, and the developing agent can be stably and stably printed.

When the developing cartridge 100 is separated from the drum cartridge 50, the user pulls up the rear end portion of the developing cartridge 100, and the rear end portion of the developing cartridge 100 is tilted upward by a tensile force, so that the force-receiving surface 163a of the driving portion 163 is separated from abutment with the inner wall 51b of the drum frame 51, and the abutment force received by the force-receiving surface 163a disappears, and at this time, the slide rod 161 is separated from the metal conductive sheet 60 by the elastic member 162 and moves from the extended state of the second position to the contracted state of the first position, thereby avoiding interference of the slide rod 161 on the developing cartridge 100 and the drum cartridge 50, and enabling the developing cartridge 100 to be separated from the drum cartridge 50 conveniently.

In the process of moving the slide rod 161, the moving distance of the slide rod 161 is L, and L is more than or equal to 2.5mm.

Example 2

Next, embodiment 2 of the present utility model will be described in detail with reference to fig. 9 to 13, and this embodiment 2 provides a developing cartridge, which is the same as that of the above-described embodiment, and will not be described in detail, and is different from embodiment 1 in that a connection member for receiving power on the developing cartridge is different from embodiment 1 in that the connection member 260 includes a first power receiving member 261 and a second power receiving member 264, the first power receiving member 261 is configured as a conductive sheet of a "U" shape or "L", the first power receiving member 261 includes a first end 261a and a second end 261b, the first end 261a and the second end 261b are disposed at a spacing in a left-right direction, the first end 261a is farther from the casing 110 than the second end 261b, the first end 261a is located outside the drum frame 51 while the second end 261b is located inside the drum frame 51 in a state in which the developing cartridge 100 is mounted to the drum frame 50, and the first end 261a is not in contact with the power feeding member (the power feeding roller 120 and the power feeding roller 120) in a state in which the developing cartridge 100 is mounted to the image forming device. The second electrical connector 264 is located between the casing 110 and the support plate 115, the second electrical connector 264 is used for connecting the second end 261b of the connector 261 and at least one of the developing roller 120, the powder feeding roller 130 and the powder discharging knife 117, in this embodiment, the second electrical connector 264 is used for connecting the second end 261b of the connector 261 and the developing roller 120 and the powder feeding roller 130, so that the connector 261 can transmit power to the developing roller 120 and the powder feeding roller 130, thereby ensuring that the developer can be stably transmitted, and further effectively improving the printing quality of the developing box 100.

The support plate 115 includes a bracket 115b mated with the first power receiving member 261, the bracket 115b being formed outwardly from a right side of the bracket 115b, the bracket 115b being formed in an "L" shape as viewed in a front-rear direction, and an opening 115c being provided at a right side of the bracket 115b, a first end 261a of the first power receiving member 261 being exposed at a right side of the developing cartridge 100 through the opening 115c so that the first end 261a is connected with a power supply member of the image forming apparatus.

The developing cartridge 100 of the present utility model prevents the problem that the chip supported on the chip 180 is disconnected from the electrical contacts of the image forming apparatus after shaking the image forming apparatus during the image forming process by fixedly disposing the chip 180 at one side of the housing 110 such that the relative position of the electrical contact surface 181 of the chip 180 and the housing 110 is maintained, improves the electrical connection stability of the electrical contact surface 181 of the chip 180 and the electrical contacts of the image forming apparatus, and reduces interference that the electrical contact surface 181 may receive during the electrical connection process by disposing the electrical contact surface 181 of the chip 180 at a position away from other structures.

Example 3

Next, embodiment 3 in the present utility model will be described in detail with reference to fig. 14 to 19, this embodiment 3 provides a developing cartridge, which is not described in detail for the same point as the developing cartridge in the above embodiment, but is different from the above embodiment 1 to 2 in that a connection member for receiving power on the developing cartridge is different from the above embodiment 1 to 2 in that the developing roller 120 includes a developing roller shaft 120a made of, for example, metal to be conductive and a developing layer 120b coated on an outer surface of the developing roller shaft 120a and operable to carry a developer, and the developing layer 120b is kept in contact with an outer surface of the photosensitive drum 52 when the developing cartridge 100 is mounted in the drum cartridge 50; in addition, the developing cartridge 100 further includes a bearing member 340 provided at one end of the housing 110, the bearing member 340 being made of a non-conductive material and rotatably supporting the end of the developing roller shaft 120a, and a second forced pushing protrusion 114b integrally formed with the bearing member 340 being provided on an outer surface of the bearing member 340, the second forced pushing protrusion 114b being provided at a position closer to the front end of the housing 110 with respect to the rear end of the housing 110 in the front-rear direction, the second forced pushing protrusion 114b being also made of a non-conductive material, and being configured such that, when the developing cartridge 100 is mounted in the drum cartridge 50, the second forced pushing protrusion 55b can be brought into contact with the second forced pushing protrusion 114b and forced toward the photosensitive drum 52 by the elastic force generated by the elastic member 57, so that the developing roller 120 of the developing cartridge 100 is kept in close contact with the photosensitive drum 52, whereby print quality problems such as "whitening" can be avoided during printing can be mentioned, and in some embodiments, the second forced pushing protrusion 114b may also be used to support the developing roller shaft 120a.

Furthermore, the developing cartridge 100 further includes an electrode 350 electrically connectable to the developing roller 120, that is, the electrode 350 is made of a conductive material, and the electrode 350 is disposed at the right end of the housing 110, which makes the electrode 350 as far away from the electrical contact surface 181 disposed on the chip 180 as possible, so as to avoid mutual interference of bias voltages received by the two, and influence the electrical contact stability of the two; the electrode 350 includes a second portion 350b and a first portion 350a extending rearward from the second portion 350b, at least a portion of the first portion 350a being electrically connected to the developing roller shaft 120a farther from the developing roller shaft 120a than the second portion 350b, the electrode being in a "6" shape when viewed in the left-right direction, the electrode 350 being disposed such that the first portion 350a is in contact with the movable member 30 when the developing cartridge 100 is mounted in the drum cartridge 50, the second portion 350b of the electrode 350 being disposed in contact with the developing roller shaft 120a, that is, when the developing cartridge 100 is mounted in the drum cartridge 50 and together in the imaging device, the movable member of the imaging device, the electrode 350 of the developing cartridge 100 and the developing roller shaft 120a being electrically connected to each other, such that the imaging device can provide a bias voltage to the developing roller shaft 120a, the developer contained in the housing 110 being attracted by an electrostatic force generated by the bias voltage and attached to the developing layer 120b of the developing roller 120, and further, the second pushed projection 114b being urged toward the second drum 55b by the second push projection 55b to be brought into close contact with the developing roller 52, the developing roller 52 being urged toward the developing roller 52, the second projection 52 being urged toward the developing roller 52, thereby being able to be brought into close contact with the developing roller 52, the developing roller 52 being electrically connected to the developing roller 52 and the developing roller 52 being held by the second projection 52, finally, the developer image is transferred to the paper by the transfer device to complete the printing process.

Further, the second portion 350b of the electrode 350 is provided with a hole 350b1 extending in the left-right direction, and the hole 350b1 may be sleeved on the developing roller shaft 120a to support and electrically contact the developing roller shaft 120a, which may greatly improve the contact stability of the electrode 350 and the developing roller shaft 120 a.

Further, the housing 110 is provided with a restriction portion 341a, at least a portion of the electrode 350 is engaged with the restriction portion 341a of the housing 110 to restrict the rotation of the electrode 350 when the developing roller shaft 120a rotates, thereby avoiding the problem of unstable electrical contact with the movable member after the rotation of the electrode 350, and preferably, the restriction portion 341a is configured as a groove formed on the second forced pushing protrusion 114b, into which at least a portion of the electrode 350 is fittingly inserted, which is relatively simple and simplifies the structure of the developing cartridge 100.

Further, in order to avoid the electrode 350 interfering with the second forced protrusion 114b and avoid deformation damage caused by the electrode 350 being forced and pressed by the second forced protrusion 55b, the first portion 350a of the electrode 350 is spaced from the second forced protrusion 114b, specifically, the second forced protrusion 55b has a forced surface 55b1 facing the photosensitive drum 52, the forced surface 55b1 is used for forcing the second forced protrusion 114b toward the photosensitive drum 52, the surface not facing the photosensitive drum 52 is a non-forced surface 55b2, the first portion 350a of the electrode 350 is spaced from the forced surface 55b1 and abuts against the non-forced surface 55b2, preferably, the non-forced surface 55b2 is an electrical connection surface disposed at the upper end of the second forced protrusion 55b, and the electrical connection surface is disposed not facing the photosensitive drum 52, such that the electrode 350 is not forced to face the direction approaching the photosensitive drum 52 when the second forced protrusion 55b contacts the electrode 52, and the electrode 350 is prevented from being deformed and damaged by the second forced protrusion 55 b.

Further, to improve the electrical contact stability between the electrode 350 and the second urging protrusion 55b, the first portion 350a is configured as an elastic arm extending outward from the second portion 350b, and the elastic arm may be a spring plate or a torsion spring, and the like, and may be elastically deformed after the first portion 350a of the electrode 350 is stressed, so as to ensure the contact stability between the electrode and the movable member, and when the developing cartridge 100 is mounted in the drum cartridge 50, the resilience force generated by the deformation of the first portion 350a of the electrode 350 will force the first portion 350a to lean against the movable member 350a, and the first portion and the second portion will be in an elastic contact state, thereby improving the electrical contact stability between the electrode and the movable member.

Further, the first portion 350a of the electrode 350 is made of, for example, a metal material, which ensures that the strength of the electrode 350 is ensured, and the elastic deformation amount is increased as the structure allows, so as to further improve the electrical contact stability between the electrode and the movable member, and in other embodiments, the first portion 350a of the electrode 350 may be made of, for example, a plastic material, which is not limited thereto.

Advantageous effects

The utility model provides a developing cartridge, which can make a bearing part for supporting a developing roller and a forced pushing protrusion formed on the bearing part by arranging the electrode and the forced pushing protrusion into a separated structure, and only needs to make the electrode by using a conductive material.

The foregoing embodiments are merely for illustrating the technical solution of the present utility model, but not for limiting the same, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that modifications may be made to the technical solution described in the foregoing embodiments or equivalents may be substituted for parts of the technical features thereof, and that such modifications or substitutions do not depart from the spirit and scope of the technical solution of the embodiments of the present utility model in essence.

Claims (10)

1. A developing cartridge, comprising:

A housing for accommodating a developer, the housing having a first side and a second side spaced apart from the first side in a first direction, the housing having a third side and a fourth side spaced apart from the third side in a second direction intersecting the first direction;

a developing roller rotatable about a developing roller axis extending in the first direction, the developing roller being closer to the third side of the casing with respect to the fourth side of the casing in the second direction;

a toner feeding roller rotatable about a toner feeding roller axis extending in the first direction, the toner feeding roller being for conveying the developer to the developing roller;

A powder discharging knife for controlling the thickness of the developer attached to the outer surface of the developing roller;

A coupling gear for receiving an external driving force of the developing cartridge and rotatable about a coupling gear axis extending in the first direction, the coupling gear being located at the first side of the housing in the first direction;

A chip having an electrical contact surface located on the first side of the housing in the first direction;

a forced pushing projection having a force receiving surface which can receive a force from outside the developing cartridge to hold the developing roller in contact with a photosensitive drum outside the developing cartridge;

characterized by further comprising:

An electrode having an electrical contact portion that can receive power external to the developing cartridge and is electrically connected to at least one of the developing roller, the powder feeding roller, and the powder discharging blade;

The force receiving surface is closer to the third side of the housing than the coupling gear axis of the coupling gear in the second direction;

in the second direction, the electrical contact is disposed spaced apart from the force receiving surface.

2. The developing cartridge according to claim 1, further comprising a force receiving member movable relative to the housing to receive a force external to the developing cartridge;

The electrical contact is movable relative to the housing in response to movement of the force-bearing member.

3. A developing cartridge according to claim 1, wherein said developing cartridge is detachably mountable to a drum cartridge having a power supply member;

The electrical contact is movable relative to the housing from a first position to a second position;

The first position is configured as a position where the electrical contact portion is not in contact with the power feeding member, and the second position is configured as a position where the electrical contact portion is in contact with the power feeding member.

4. The developing cartridge according to claim 1, wherein the electrical contact portion is movable in the first direction with respect to the housing.

5. The developer cartridge according to claim 1, wherein the force receiving surface electrode is located outside a projection range of the electrode, projected in the first direction.

6. The developing cartridge according to claim 1, wherein the electrical contact portion is exposed at the second side of the casing in the second direction, the electrical contact portion being farther from the second side of the casing than the forced protrusion in the first direction.

7. The developing cartridge according to claim 1, wherein the developing cartridge includes a bracket for supporting the electrical contact portion, the bracket being formed outwardly from the second side of the housing.

8. The developing cartridge according to claim 7, wherein the bracket is "L" -shaped as viewed in the second direction.

9. The developing cartridge according to claim 1, wherein in the second direction, the electrical contact is farther from the fourth side of the casing than the force receiving surface.

10. The developing cartridge according to claim 1, wherein in the first direction, the electric contact portion is provided on an opposite side of the electric contact surface.