CN222281053U - Developing box - Google Patents

Abstract

The utility model discloses a developing box, including a box body, a developing assembly, a separating assembly and an identifying assembly. The box body is used to store a developer. The developing assembly includes a developing roller used to cooperate with a photosensitive drum to develop an image. The separating assembly includes a separating rod movably mounted on the box body. The separating rod can receive the separating force of an image forming device and move on the box body to push the developing box to rotate. The identifying assembly includes a chip. The chip can move relative to the drum unit in the developing box and maintain electrical connection with the drum unit. In the developing box of the utility model, the electrical contact surface can contact the electrical terminal on the drum unit when the developing box is installed on the drum unit and is in the first position and the second position while keeping the chip frame stationary, and will not make hard contact with the electrical terminal, which can effectively prevent the failure of information recognition caused by the electrical terminal being damaged by hard contact.

Description

Developing box

Technical Field

The present utility model relates to the field of image forming apparatuses, and more particularly, to a developing cartridge.

Background

An electrophotographic image forming apparatus includes a cartridge that develops an electrostatic latent image on a photosensitive drum with toner. The cartridge includes a developing roller rotatably supported in a casing thereof, and develops the toner stored in the casing by supplying the toner from the developing roller to the photosensitive drum.

In the printing process, in order to ensure normal printing, the developing roller needs to be in abutting contact with the photosensitive drum. When printing is finished, the developing roller and the photosensitive drum need to be separated by a certain distance to avoid the problem that the photosensitive drum is polluted by the redundant developer attached on the developing roller or deformed or worn by the photosensitive drum due to long-time contact between the developing roller and the photosensitive drum.

While each developing cartridge includes a memory and an electrical contact surface, the memory may be an Integrated Circuit (IC) chip, for example. The drum unit (drum cartridge) to which the developing cartridge is attached to the image forming apparatus, and when the cartridge body of the developing cartridge is in the second position, that is, when the developing roller contacts the photosensitive drum, the electric contact surface is in contact with the electric terminal provided in the image forming apparatus, the image forming apparatus is capable of reading information of the developing cartridge, and when the cartridge body of the developing cartridge is in the first position, the electric contact surface is not in contact with the electric terminal provided in the image forming apparatus, and an error is caused to the image forming apparatus if the electric contact surface is out of contact with the electric terminal provided on the drum unit.

Therefore, a technical solution to the above-mentioned problems is needed.

Disclosure of utility model

In order to solve the technical problems in the prior art, an object of the present utility model is to provide a developing cartridge to solve the technical problems.

In order to achieve the purpose, the utility model adopts the following technical scheme:

A developing cartridge detachably mountable in an image forming apparatus including a drum unit and an electric terminal, the developing cartridge comprising:

A cartridge having a receiving chamber for storing a developer, the cartridge having a first sidewall and a second sidewall along a first direction, a first surface and a second surface in a second direction, and a first end and a second end in a third direction;

A developing roller rotatable about an axis extending in a first direction, the developing roller being closer to the first end than the second end in a third direction;

A power receiving portion provided at a second side wall of the casing for receiving a driving force from the image forming apparatus;

The chip is arranged on the chip frame, the chip frame is arranged on the first side wall of the box body, and the chip comprises an electric contact surface which can be electrically connected with the image forming device through the electric terminal.

Preferably, the chip is provided with an "n" shaped groove, the electrical contact surface is disposed in the "n" shaped groove, and an opening of the "n" shaped groove faces the developing roller in a third direction.

Preferably, when the developing cartridge is mated with the image forming apparatus, the electrical terminal extends into the "n" shaped groove, and the electrical contact surface abuts against a side wall of the electrical terminal, thereby completing electrical connection of the electrical contact surface with the image forming apparatus.

Preferably, the electrical contact surface on the chip is movable relative to the case in a second direction, the chip further comprising a substrate and a storage die, the electrical contact surface being provided on the substrate, the electrical contact surface being electrically connected to the storage die.

Preferably, the electrical contact surface is a bending part, the bending part comprises a fixing part connected to the substrate and a tilting part forming an included angle with the fixing part, the tilting part can be abutted with the electrical terminal, and the tilting part can move back and forth relative to the box body in a second direction.

Preferably, the electrical contact surface is arched, the arch comprising an opening facing the substrate in the second direction and a curved portion movable back and forth relative to the cartridge in the second direction.

Preferably, the developing device further comprises a stirring frame, the stirring frame comprises a first stirring frame and a second stirring frame, the second stirring frame is located between the first stirring frame and the developing roller in the third direction, the first stirring frame is provided with first stirring teeth, and the first stirring teeth can receive the driving force transmitted by the power receiving part to drive the first stirring frame to rotate.

Preferably, the first stirring frame is provided with a first stirring blade, the second stirring frame is provided with a second stirring blade, the projection of the rotation track of the first stirring blade in the first direction interferes with the projection part of the rotation track of the second stirring blade in the first direction, and the first stirring frame can stir the second stirring blade through the first stirring blade when rotating, so as to drive the second stirring frame to rotate.

Preferably, the second stirring frame is provided with second stirring teeth, the first stirring teeth are connected with the second stirring teeth through a belt, and the first stirring teeth can drive the second stirring teeth to rotate through the belt when rotating, so as to drive the second stirring frame to rotate.

Preferably, a first transmission part and a second transmission part are further arranged between the first stirring teeth and the second stirring teeth, a first driving protrusion is arranged on the second transmission part, a second driving protrusion is arranged on the second stirring teeth, the first driving protrusion interferes with the rotation track of the second driving protrusion, the first stirring teeth rotate to drive the first transmission part and the second transmission part to rotate, and the second transmission part drives the second stirring teeth to rotate through the first driving protrusion to stir the second driving protrusion, so that the second stirring frame is driven to rotate.

Preferably, the second stirring rack is further sleeved with an elastic piece between the second stirring teeth and the box body, the elastic piece can be compressed when the second stirring teeth are matched with the second transmission piece to enable the second stirring rack to rotate, and the elastic piece is released after the second stirring teeth are matched with the second transmission piece, so that the second stirring rack rotates along the direction opposite to the compressed direction of the elastic piece.

Preferably, the developing cartridge is symmetrically provided with a relief groove in a first direction, the relief groove extends in a third direction, and when the developing cartridge and the drum unit are mounted together in the image forming apparatus, a pressing portion on the image forming apparatus can be engaged with the relief groove, so that the developing cartridge does not receive the force of the pressing portion.

Preferably, the developing cartridge further includes a developing electrode including a movable member and a conductive member, the conductive member being connected to the developing cartridge through the movable member, the movable member being displaceable in a second direction, the conductive member being electrically connectable to the drum unit.

According to the developing box, the electric contact surface is provided with the n-type structural groove or the arched or bent part, so that when the developing box is arranged on the drum unit and is positioned at the first position and the second position under the condition that the chip holder is kept still, the developing box can be contacted with the electric terminal on the drum unit, and cannot be in hard contact with the electric terminal, and the information identification failure and other results caused by hard contact damage to the electric terminal can be effectively prevented.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of a prior art drum unit;

FIG. 2 is a perspective view of a conventional drum unit;

FIG. 3 is a perspective view of a developing cartridge according to a first embodiment of the present utility model;

FIG. 4 is a schematic view of a developer cartridge drive assembly according to a first embodiment of the present utility model;

FIG. 5 is a second perspective view of a developer cartridge according to the first embodiment of the present utility model;

FIG. 6 is an enlarged schematic view of the structure at position A in FIG. 5;

Fig. 7 is a perspective view of the developing cartridge of the first embodiment of the present utility model after being mounted on the drum unit;

FIG. 8 is an enlarged schematic view of the structure of the position B in FIG. 7;

FIG. 9 is a schematic side view of a cartridge of the first embodiment of the present utility model beginning engagement of the chip with the electrical contact assembly of the drum unit;

FIG. 10 is a schematic perspective view of a cartridge chip and drum unit electrical contact assembly in accordance with one embodiment of the present utility model;

FIG. 11 is a schematic view showing a structure in which an electrical contact assembly of a drum unit is inserted into a chip of a developing cartridge in accordance with the first embodiment of the present utility model;

fig. 12 is a perspective view of a developing cartridge in accordance with the second embodiment of the present utility model;

FIG. 13 is an enlarged schematic view of the structure of FIG. 12 at position C;

fig. 14 is a perspective view of a developing cartridge in a third embodiment of the present utility model;

FIG. 15 is an enlarged schematic view of the structure of the position D in FIG. 14;

fig. 16 is a perspective view of a developing cartridge in a fourth embodiment of the present utility model;

FIG. 17 is an enlarged schematic view of the structure of FIG. 16 at position E;

fig. 18 is a perspective view of a developing cartridge mounted on a drum unit in the fourth embodiment of the present utility model;

FIG. 19 is a schematic view showing a configuration of a developing cartridge and a pressing portion according to a fifth embodiment of the present utility model;

FIG. 20 is a second schematic view of a development cartridge and pressing portion in accordance with the fifth embodiment of the present utility model;

Fig. 21 is an exploded view of a developing cartridge according to a sixth embodiment of the present utility model;

FIG. 22 is a schematic diagram showing the structure of the first stirring frame and the second stirring frame according to the sixth embodiment of the present utility model;

FIG. 23 is an exploded view of a second side wall of a developer cartridge according to a seventh embodiment of the utility model;

FIG. 24 is a schematic diagram showing the cooperation between a second stirring frame and a driving member in a seventh embodiment of the present utility model;

Fig. 25 is a schematic diagram of a structure of a second stirring frame matched with a transmission member in a seventh embodiment of the present utility model.

Fig. 26 is a schematic diagram II of a structure of a second stirring frame matched with a driving member in the seventh embodiment of the present utility model.

10, Developing cartridge; 110, a box body; 11, a first protecting cover; 12, front end cap, 13, outlet, 15, developing roller, 18, first protrusion, 19, second protrusion, 112, forced pushing portion, 120, transmission assembly, 121, power receiving portion, 1211, developing gear, 1212, powder feeding gear, 1213, driving gear, 1214, idler, 1215, first stirring gear, 122, guide slot, 123, fixed portion, 124, relief slot, 125, first stirring gear, 126, first transmission member, 127, second transmission member, 1271, first driving protrusion, 130, identification assembly, 131, chip, 1311, substrate, 1312, bend portion, 1313, fixed portion, 1314, cocking portion, 132, chip holder, 1301, chip first electrical contact surface, 1302, chip second electrical contact surface, 1303, chip third electrical contact surface, 1304, chip fourth electrical contact surface, 1305, chip guide, 1306, notch, 140, separation assembly, 151, electrode protrusion, 152, developing electrode, 1521, movable member, 1522, conductive member, 1523, second conductive member, 16222, 1624, second conductive member, 16223, second conductive member, 1622, second conductive member, 16222, 1624, second conductive member, 16223, second conductive member, cylindrical gear, cylindrical housing, second conductive member, cylindrical housing, hollow portion, hollow housing, hollow portion, hollow housing, hollow shaft, and hollow shaft, and, hollow shaft, hollow motor, cylindrical;

20. Drum unit, 200, drum unit support, 210, installation cavity, 220, photosensitive drum, 201, first side plate, 201A, first concave part, 201B, through hole, 202, second side plate, 202A, second concave part, 203, installation cavity plate, 211, forced pushing piece, 212, first boss, 213, second boss, 214, third boss, 215, fourth boss, 2111, first supporting surface, 2141, third supporting surface, 2131, second supporting surface, 2151, fourth supporting surface, 204, electric contact assembly, 2041, electric connector, 2042, electric terminal, 205, electric connection part;

3. A pressing part.

Detailed Description

For a better understanding of the technical solution of the present utility model, the following detailed description of the embodiments of the present utility model refers to the accompanying drawings.

It should be understood that the described embodiments are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 2, the drum unit 20 includes a drum unit bracket 200 and a photosensitive drum 220, the drum unit 20 is provided with a mounting chamber 210 in which the developing cartridge 10 is mounted, the developing cartridge 10 is detachably secured in the mounting chamber 210 via an opening of the mounting chamber 210, the photosensitive drum 220 can form an electrostatic latent image on a surface, the developing cartridge 10 can be engaged with the drum unit 2 for development image formation, and the drum unit 20 is drawably mounted in an image forming apparatus. Since the drum unit 20 has a conventional structure, only a brief description will be given below regarding a partial structure of the drum unit 20, and for better explanation of the respective members of the drum unit 20, a left-right direction (also an axial direction of the photosensitive drum 220) in which the drum unit 20 is disposed is a first direction, a front-rear direction (also a drawing direction of the drum unit 20) in which the drum unit 20 is disposed is a second direction, a height direction (also a mounting/dismounting direction of the developing cartridge 10) of the drum unit 20 is a third direction, and the first direction, the second direction and the third direction intersect each other, and are perpendicular to each other. In the description of the present utility model, the left-right direction is an embodiment of the first direction, the front-rear direction is an embodiment of the second direction, and the up-down direction is an embodiment of the third direction, but the first direction, the second direction, and the third direction are not limited to the left-right direction, the front-rear direction, and the up-down direction.

The drum unit bracket 200 includes first and second side plates 201 and 202 and a partition plate 203. The first side plate 201 and the second side plate 202 are disposed opposite to each other in the first direction and spaced apart from each other, the first side plate 201 and the second side plate 202 each extend in the second direction, the partition plate 203 is located between the first side plate 201 and the second side plate 202 in the first direction, and the partition plates 203 are arranged at intervals in the second direction, the partition plate 203 extends in the first direction, and the partition plate 203 can partition the space formed between the first side plate 201 and the second side plate 202 in the second direction even if the mounting chamber 210 is formed on the drum unit bracket 200.

The photosensitive drum 220 is disposed at a position between the first side plate 201 and the second side plate 202 in the first direction, and the photosensitive drum 220 is rotatable along a rotation axis parallel to the first direction. When the developing cartridge 10 is attached to the mounting chamber 210, the developing roller 15 contacts the photosensitive drum 220, completing the developing work.

In general, the image forming apparatus may be provided with one or more developing cartridges 10 which are detachably mounted, so that there may be at least one mounting chamber 210 of the drum unit 20, and when there are a plurality of mounting chambers 210, the plurality of mounting chambers 210 are arranged in parallel in the second direction of the drum unit, each of the mounting chambers 210 is for clamping one developing cartridge 10, that is, at least one developing cartridge 10 may be correspondingly disposed on the drum unit 20, and each developing cartridge 10 may accommodate different color developer, such as bk\c\m\y, etc. Preferably, in the present embodiment, the image forming apparatus may be provided with four developing cartridges 10, so that three partition plates 203 are provided on the drum unit holder 200 of the drum unit 2, the partition plates 203 are plate-shaped, the partition plates 203 partition four mounting chambers 210 for accommodating the developing cartridges 10 storing different color developers on the drum unit holder 200, and a plurality of photosensitive drums 220 are provided in the drum unit holder 200, the plurality of photosensitive drums 220 being disposed at positions between the first side plate 201 and the second side plate 202 in the first direction, that is, photosensitive drums 220 are rotatably provided in each of the mounting chambers 210.

The first side plate 201 is plate-shaped, and the first side plate 201 is provided with first concave portions 201A and through holes 201B which are consistent in number with the mounting cavities 201 and are in one-to-one correspondence with the mounting cavities 201. Each through-hole 201B penetrates the first side plate 201 in the first direction, and each developing cartridge 10 can receive the driving force of the image forming apparatus through the through-hole 201B in a state in which each developing cartridge 10 is attached to the mounting chamber 210.

The second side plate 202 is also plate-shaped, and the second side plate 202 has second concave portions 202A formed corresponding to each of the plurality of mounting cavities 210, each second concave portion 202A penetrating the second side plate 202 in the first direction and being recessed toward the corresponding photosensitive drum 220 in the third direction, and the chip 131 and the chip rack 132 (to be described later) provided on the developing cartridge 10 are positioned in the corresponding second concave portion 202A in a state where each developing cartridge 10 is attached to the corresponding mounting cavity 210.

The second side plate 12 is further provided with an electrical contact assembly 204, the electrical contact assembly 204 is disposed in the second recess 202A, the electrical contact assembly 204 includes an electrical connector 2041, an electrical terminal 2042, an electrical contact elastic member and a transmission terminal, the electrical terminal 2042 is telescopically mounted in the second recess 202A, the electrical terminal 2042 is telescopically mounted along the second direction, the front end of the electrical terminal 2042 extends out of the front surface of the second recess 202A, and the rear end of the electrical terminal 2042 is connected with the electrical connector 2041 and is in electrical contact. The electrical contact spring is used to keep the front end of the electrical terminal 2042 protruding out of the front surface of the second recess 202A. The electrical connector 2041 is also electrically connected to a transmission terminal for electrically contacting a receiving terminal in the image forming apparatus when the drum unit is mounted in the image forming apparatus.

The mounting chamber 210 has a plurality of support surfaces by which each developing cartridge 10 is supported or locked in a state in which each developing cartridge 10 is attached to the mounting chamber 210, each support surface being configured to receive the weight of the developing cartridge 10 within the mounting chamber 210 so that the developing cartridge 10 can be rotatably mounted within the mounting chamber 210 of the drum unit 20. The first side plate 201 is provided with a first boss 212 and a second boss 213 protruding leftward along the first direction on a side surface opposite to the second side plate 202 in the first direction, the second side plate 202 is provided with a third boss 214 and a fourth boss 215 protruding rightward along the first direction on a side surface opposite to the first side plate 201 in the first direction, the first boss 212 is aligned with the third boss 214 in the second direction, the second boss 213 is aligned with the fourth boss 215 in the third direction, the first boss 212 and the third boss 214 are respectively provided with a first supporting surface 2111 and a third supporting surface 2141, the first supporting surface 2111 and the third supporting surface 2141 are coplanar in the first direction, the second boss 213 and the fourth boss 215 are respectively provided with a second supporting surface 2131 and a fourth supporting surface 2151, and the second supporting surface 2131 and the fourth supporting surface 2151 are coplanar in the first direction. The first to fourth supporting surfaces are the upper surfaces of the first to fourth bosses, respectively, and the first to fourth supporting surfaces face the same direction and are all in the third direction, so that the developing cartridge can be supported by the supporting surfaces when the developing cartridge is mounted in the third direction.

The first side plate 201 and the second side plate 202 are provided with a locking assembly at a position aligned in the first direction, the locking assembly including a locking elastic member (not shown) and a locking member (not shown). The locking spring is a torsion spring pivotally mounted on the first side plate 201 and/or the second side plate 202. The locking member is provided with a curved surface, and the locking member is rotatable about an axis of rotation parallel to the first direction between a locked position and an unlocked position. One end of the locking elastic member is abutted against the first side plate 201/the second side plate 202, and the other end is abutted against the locking member, so that a resetting effect is generated on the locking member.

The second side plate 202 is further provided with a drum electrode including a receiving end and a power supply end, and the image forming apparatus further includes a mounting bin for mounting the drum unit 1 to which the developing cartridge 2 is attached, and a power supply terminal is provided in the mounting bin for contacting the receiving end of the drum electrode on the unit 1 and supplying electric power so as to charge the drum electrode on the drum assembly 1, and the power supply end of the drum electrode is used for supplying power to the developing cartridge 2.

The drum unit 20 is further provided with a pushing member 211, where the pushing member 211 includes an elastic portion and a force application portion, the elastic portion can be compressed to generate elastic deformation, and then the force application portion is pushed to apply a pushing force to the developing cartridge 10 under the action of the elastic force, and the direction of the pushing force is parallel to the second direction, so that the developing roller 15 on the developing cartridge 10 can be tightly attached to the photosensitive drum 220. Preferably, in this embodiment, two urging members 211 are disposed in each mounting cavity 210, and the two urging members 211 are disposed on two sides of the partition 203 in the first direction, so that the urging force can be uniformly transferred to the developing cartridge 10 in the first direction, and the problem that the developing roller 15 and the photosensitive drum 220 are not adhered uniformly in the first direction due to the asymmetric urging force of the developing cartridge 10 caused by the asymmetric disposition of the urging members 211 is avoided.

The drum unit 20 is further provided with a handle, which is located at the partition plate 203 at one end portion of the drum unit bracket 200 in the second direction, that is, the handle is located at the outer side surface of the partition plate 203 in the second direction, and is configured to be gripped by a user to pull/push the drum unit 20 out of/into the image forming apparatus main body.

Except for the position and structure of the electrical contact assembly 204, the specific structure of the drum unit 20 and the operation mode thereof are all the prior art, the cooperation between the drum unit 20 and the image forming apparatus is the prior art, and the details are not repeated herein, and only the structure and cooperation process of the developing cartridge 10 and the electrical contact assembly 204 are disclosed in the present application.

Example 1

Referring to fig. 3 to 11, a developing cartridge 10 includes a cartridge body 110, a developing assembly, a driving assembly 120, a separating assembly, an identifying assembly 130, a first protective cover 11, and a second protective cover. In the present embodiment, when the developing cartridge 10 is mounted on the drum unit 20, the direction of the developing cartridge 10 coincides with the direction of the drum unit 20.

The box body 110 is internally provided with a containing cavity for containing developer, the box body 110 is provided with a first side wall a and a second side wall b which are oppositely arranged in a first direction (the length direction of the box body 110), the box body 110 is provided with a first end c and a second end d which are oppositely arranged in a third direction, the box body 110 is provided with a first surface e and a second surface f which are oppositely arranged in a second direction, the first surface e of the box body 110 is provided with a front end cover 12, the box body 110 is also provided with a powder outlet 13, the powder outlet 13 is communicated with the containing cavity, and the powder outlet 13 is positioned at the junction of the first end c and the first surface e.

The developing assembly comprises a developing roller 15, a powder feeding roller and a stirring frame which are rotatably arranged in the accommodating cavity, wherein the developing roller 15, the powder feeding roller and the stirring frame are rotatably supported by a first side wall a and a second side wall b of the box body 110, and the rotation axes of the developing roller 15, the powder feeding roller and the stirring frame all extend along a first direction, namely, the rotation axes of the developing roller 15, the powder feeding roller and the stirring frame are all parallel to the first direction.

The developing roller 15 is used for developing and forming a developer image of a corresponding color on the surface of the photosensitive drum 220, and the developing roller 15 is disposed between the sidewalls of the two ends of the cartridge body 110, preferably, the developing roller 15 is disposed at the second end d of the cartridge body 110, and the developing roller 15 is close to the first surface e and far from the second surface f. Specifically, the developing roller 15 includes a developing roller body and a developing roller shaft coaxially disposed, the developing roller body being hollow cylindrical, the developing roller body surrounding the developing roller shaft and covering a developing roller shaft portion, the developing roller 15 being capable of being used to contact the photosensitive drum 220 on the image forming apparatus and supply developer to the photosensitive drum 220 when the developing cartridge 10 is attached to the drum unit 20.

The agitator is located inside the cartridge body 110, and the axis of the agitator extends in a first direction, and in the present application, the developing cartridge 10 has a first agitator 161 and a second agitator 162, and in a third direction, the second agitator 162 is closer to the developing roller 15 than the first agitator 161, the first agitator 151 has a first agitating blade 1611 thereon, and the second agitator 162 has a second agitating blade 1621 thereon. In the following description, the first stirring frame 161 and the second stirring frame 162 will be collectively described with stirring frames unless otherwise specified. Illustratively, the agitator has a plurality of paddles fixedly mounted to the agitator shaft, the paddles moving with the agitator shaft, the agitator for agitating the developer in the receiving chamber to triboelectrically charge the developer and prevent agglomeration of the developer.

The transmission assembly 120 is disposed on the second side wall b of the box body 110, and includes a developing gear 1211, a powder feeding gear 1212, a driving gear 1213, a first stirring gear 1215, and an idler 1214, where the developing gear 1211 is coaxially and fixedly mounted on an end of the developing roller shaft near the second side wall b of the box body 110, and the powder feeding gear 1212 is coaxially and fixedly mounted on an end of the powder feeding roller shaft near the second side wall b of the box body 110, and the first stirring gear 1215 is coaxially and fixedly mounted on an end of the stirring frame near the second side wall b of the box body 110.

Further, the transmission assembly further includes a driving part rotatably supported by the second sidewall b of the case 110, the driving part including a power receiving part 121 and a driving gear 1213 coaxially integrally formed, the driving gear 1213 being closer to the first sidewall a of the case 110 than the power receiving part 121 in the first direction, the power receiving part 121 and the driving gear 1213 coaxially rotating, the power receiving part 121 for receiving an externally (image forming apparatus) inputted torque, the driving gear 1213 being directly or indirectly engaged with the developing gear 1211, the powder feeding gear 1212, the first stirring gear 1215 to transmit power to the developing roller 15, the powder feeding roller, the stirring frame. Preferably, in the present embodiment, an idler 1214 is disposed between the driving gear 1213 and the first stirring gear 1215, the idler 1214 is rotatably supported by the second side wall b of the case 110, the rotation axis of the idler 1214 is parallel to the first direction, the idler 1214 is engaged with the driving gear 1213 and the first stirring gear 1215 so as to transmit the power of the driving gear 1213 to the first stirring gear 1215, the first stirring gear 1215 may be provided with a first transmission portion, the second stirring frame 162 may be provided with a second transmission portion, and the first stirring gear 1215 and the second stirring frame 162 may be transmitted through the first transmission portion and the second transmission portion, or a plurality of idlers may be disposed or not disposed so as to adjust the transmission ratio or the rotation direction. In addition, the gear transmission can be replaced by a belt transmission, a friction transmission and the like.

Only the structure of the developing assembly and the driving assembly 120 is known in the art, and only a simple disclosure is made, but not limited to the above-described structure.

The first protecting cover 11 is detachably and fixedly mounted on the second side wall b of the case 110, the second protecting cover (not shown) is disposed on the second side wall b of the case 110, the first protecting cover 11 covers at least a portion of the transmission assembly 120 for protecting the transmission assembly 120, and the power receiving portion 121 can be exposed at the first end of the case 110 without being blocked by the first protecting cover 11 when the first protecting cover 11 is fixed on the second side wall b of the case 110, so that the power receiving portion 121 can receive the driving force on the image forming apparatus. Specifically, in the present embodiment, the through hole 111 is provided on the first cover 11, and when the first cover 11 is fixed to the second side wall B of the cartridge body 110 by screws and/or snaps, the power receiving portion 121 can protrude from the first cover 11 at the through hole 111 on the first cover 11, and in a state where the developing cartridge 10 is attached to the drum unit 20, the power receiving portion 120 is aligned with the through hole 201B on the drum unit 20 in the first direction, and the projected area of the power receiving portion 121 in the first direction is smaller than the projected area of the through hole 201B in the first direction, so that the power receiving portion 121 is always exposed by the through hole 201B to be in driving connection with the image forming apparatus when the developing cartridge 10 moves relative to the drum unit 20.

The cartridge body 110 is further provided with a bearing portion capable of supporting the developing cartridge 10 when the developing cartridge 10 is mounted on the drum unit 20. Specifically, in the present embodiment, the bearing portion is a pair of first protrusions 18 provided on the cartridge body 110, the first protrusions 18 extend in a first direction at the end of the cartridge body 110 and protrude in a direction away from the cartridge body 110, i.e., the pair of first protrusions 18 are provided on the first side wall a and the second side wall b of the cartridge body 110, respectively, the pair of first protrusions 18 protrude outward with respect to the first side wall a or the second side wall b, and the pair of first protrusions 18 are symmetrically provided with respect to the cartridge body 110, so that the left and right ends of the developing cartridge 10 can be balanced when supported by the bearing portion, which is advantageous for the stable installation of the developing cartridge 10 in the image forming apparatus. Or in some other embodiments, two first protrusions 18 may be provided asymmetrically, or only one first protrusion 18 may be provided.

The cartridge body 110 further includes a locked portion for being locked by a locking member on the drum unit 20 when the developing cartridge 10 is mounted to the image forming apparatus, preventing the developing cartridge 10 from non-preset movement in the image forming apparatus. Specifically, in the present embodiment, the locked portions are a pair of second protrusions 19 provided at both right and left ends of the case 110 in the first direction, and the pair of second protrusions 19 are protrusions extending away from the case 110 in the first direction from the end of the case 110.

In the present embodiment, since the developing cartridge 10 is rotatable during mounting to the drum unit 20, the first projection 18 and the second projection 19 may also be sleeved with collars rotatable relative to the first projection 18 and the second projection 19 to reduce friction. In the process of mounting the developing cartridge 10 to the drum unit 20, if the first projection 18 and the second projection 19 are both rotatable, the first projection 18 and the second projection 19 can be prevented from directly contacting and rubbing against the drum unit 20, sliding friction can be reduced, friction force can be reduced, and abrasion to the drum unit 20 can be prevented.

The cartridge body 110 is further provided with a pushing part 112, and when the developing cartridge 10 is mounted on the drum unit 20, the pushing part 112 can receive the pushing force of the pushing member 211 of the drum unit 20, so that the developing roller 15 of the developing cartridge 10 can approach the photosensitive drum 220 of the drum unit 20. Specifically, in the present embodiment, the urging portion 112 includes a first urged member provided at a position near the first side wall a at the bottom of the developing cartridge 10 and a second urged member provided at a position near the second side wall b at the bottom of the developing cartridge 10, each of the first and second urged members includes a pressure receiving portion 112, that is, a pair of pressure receiving surfaces are provided on the second surface f of the cartridge body 110, for directly contacting the urging member 211 in the drum unit 20 to receive the urging force exerted by the urging member 211 in the second direction and drive the developing cartridge 10 to have a tendency to move in the second direction, so that the developing roller 15 is brought into close contact with the photosensitive drum 220 in the drum unit 20, ensuring the image forming quality of the image forming apparatus, preferably, the first and second urged members can be overlapped in the first direction to ensure consistent degree of positional stress of the developing roller 15 contacting the photosensitive drum 220. Or in some other embodiments, the first forced pushing member and the second forced pushing member may not be overlapped, or only one forced pushing member may be provided.

The electrode projection 151 is rotatably sleeved on the left end of the developing roller shaft, the third projection is rotatably sleeved on the right end of the developing roller shaft, and the electrode projection 151 is aligned with the third projection in the first direction. Preferably, the electrode protrusions 151 are made of a conductive material, such as a conductive resin. In other embodiments, the electrode projection 151 may also be the left end portion of the developing roller shaft itself without providing an additional part, and when the developing cartridge is attached to the drum unit, the power supply end of the drum electrode contacts the electrode projection 151 on the developing cartridge to supply power to the order from the developing roller shaft to the first cover 11 to the toner feeding roller shaft via the conductive projection, so that the developing roller and the toner feeding roller are charged to facilitate the adsorption of the developer by the developing roller and the toner feeding roller.

Further, the third protrusion and electrode protrusion 151 is further forward than the first protrusion 18 and the second protrusion 19 in the second direction, the third protrusion and electrode protrusion 151 is further downward than the first protrusion 18 and the second protrusion 19 in the third direction, the first protrusion 18 is further forward than the second protrusion 19 in the second direction, and the first protrusion 18 is further downward than the second protrusion 19 in the third direction.

At least one of the third protrusion, the electrode protrusion 151, the first protrusion 18, and the second protrusion 19 may be provided to be non-rotatable, and at least one of the third protrusion, the electrode protrusion 151, the first protrusion 18, and the second protrusion 19 may be provided to the first cover 11 or the second cover. The third protrusion, the first protrusion 18, the second protrusion 19, and the electrode protrusion 151 move together with the case 110, and at least one of the third protrusion, the first protrusion 18, the second protrusion 19, and the electrode protrusion 151 may be provided.

The identification member is provided at the first side wall a of the cartridge body 110, and the image forming apparatus is configured to contact the identification member on the drum unit 20 so that the image forming apparatus can read information in the memory wafer, thereby identifying information (new and old, model, lifetime, etc.) of the developing cartridge 10. Specifically, in the present embodiment, the identification means includes a chip 131 and a chip holder 132 provided on the first side wall a of the cartridge body 110, and preferably, the chip 131 stores therein information about the developing cartridge 10, such as a manufacturing serial number of the developing cartridge 10, an identification code of the developing cartridge 10, a model number matching with the developing cartridge 10, a specification of the developing cartridge 10, a capacity of a developer, a service life of the developing roller 15, a number of prints, an error history, and the like, the chip 131 includes a memory cell capable of reading data and writing data thereto for contact with the image forming apparatus, and a plurality of electrical contact surfaces made of metal having conductivity, and the chip 131 is capable of transferring the developing cartridge 10 information to the image forming apparatus through the electrical contact surfaces. The chip 131 is fixedly mounted on the chip rack 132, and the chip rack 132 is detachably mounted on the first side wall a of the box body 110 in the first direction, so as to adjust the position of the chip 131 or facilitate assembling the chip 131, and of course, the chip rack 132 may be integrally formed with the box body 110, and at this time, it is understood that the chip 131 is fixed on the outer wall surface of the side wall of the box body 110. When the developing cartridge 10 and the image forming apparatus are mounted, the electric contact surface corresponds in position to the electric contact member 204 of the drum unit 20, the electric contact surface of the chip 131 can be brought into contact with the electric contact member 204, and the electric contact member 204 is connected to the image forming apparatus so that the developing cartridge 10 is recognized by the image forming apparatus.

The electrical contact surface on the chip 131 is provided as an n-shaped structural groove, and when the developing cartridge 10 is mounted on the drum unit 20, the electrical contact member 204 on the drum unit 20 can move in the n-shaped groove, and the groove walls are abutted to maintain electrical connection. Specifically, in the present embodiment, the electrical contact surfaces include a chip first electrical contact surface 1301, a chip second electrical contact surface 1302, a chip third electrical contact surface 1303, a chip fourth electrical contact surface 1304, and a chip guide surface 1305, the chip first electrical contact surface 1301 being disposed rearward in the third direction, the chip second electrical contact surface 1302 and the chip fourth electrical contact surface 1304 being disposed opposite each other in the first direction, the chip first electrical contact surface 1301 being oriented in the second direction, the chip third electrical contact surface 1303 and the chip 131 guide surface being disposed in the third direction, the chip guide surface 1305 being disposed below the chip first electrical contact surface 1301, the electrical contact surfaces corresponding to the positions of the electrical contact assemblies 204 when the developing cartridge 10 is mounted to the drum unit 20, and the electrical terminals 2042 of the electrical contact assemblies 204 being capable of extending into the electrical contact surfaces of the "n" shaped structural grooves to contact one of the sides thereof.

The electrical contact surface is also provided with a notch 1306, through which the electrical terminal 2042 can be accommodated when the developing cartridge 10 is mated with the drum unit 20, and a side wall of the notch 1306 can be in contact with an outer peripheral wall of the electrical terminal 2042. Specifically, in the present embodiment, the electrical contact surface of the "n" -shaped structure groove is provided with an opening facing away from the third direction, the opening is the notch 1306, and when the developing cartridge 10 is mounted to the drum unit 20 along the third direction, the electrical terminal 2042 of the electrical contact assembly 204 can pass through the notch 1306 and further inside the electrical contact surface of the "n" -shaped structure groove, and the outer peripheral wall of the electrical terminal 2042 can contact with the side wall of the electrical contact surface of the "n" -shaped structure groove, so as to realize electrical connection. Through setting up breach 1306 on the electric contact surface, when electric contact surface and electric terminal 2042 contact, through the wall contact of breach 1306 with electric terminal, like this, box body 110 just has slight rocking, the lateral wall of breach 1306 also can always be with the peripheral wall contact of electric terminal 2042, can effectually prevent the phenomenon that can appear the poor contact when original terminal contacts, and set up breach 1306 portion, electric terminal 2042 can stretch into the breach 1306 portion and contact with the point contact surface, and all be the perisporium contact, the interference is darker can not appear, the condition of damage point contact surface and electric terminal 2042.

The electrical contact surface may be provided in plural numbers, and the number of the electrical terminals 2042 of the electrical contact assembly 204 on the drum unit 20 corresponds to the number of the electrical contact surfaces, and each of the electrical terminals 2042 corresponds to one of the electrical contact surfaces when the developing cartridge 10 is mounted on the drum unit 20, so that the electrical contact surfaces and the electrical contact assembly 204 can be electrically connected. Specifically, in the present embodiment, the chip 131 is provided on the side wall surface of the cartridge body 110 side in the second direction. It should be noted that, the side wall surface along the second direction may refer to the side wall surface of the case or the side wall surface of the first protecting cover 11 or the second protecting cover, as long as the chip 131 can be electrically connected to the electrical terminal 2042, and the component parts where the chip 131 is located are not distinguished in this embodiment. Four electrical contact surfaces are provided, which are arranged in an array in a first direction, four electrical terminals 2042 of the electrical contact assembly 204 are likewise provided, which are arranged in an array in the first direction, and the four electrical contact surfaces and the four electrical terminals 2042 may be different transmission signals or the same transmission signal.

Further, the recognition assembly 130 is located on the right side of the cartridge body 110 in the first direction and above the developing roller 15 in the third direction.

Or in some other embodiments, chip 131 may be removably mounted on chip carrier 132.

As the developing cartridge 10 moves in the third direction opposite to the photosensitive drum 220 near the partition plate 203, the electric terminals 2042 first pass through the chip guide surface 1305, then the free ends of the electric terminals 2042 in the second direction projecting direction contact the chip first electric contact surface 1301, then the circumferential cylindrical surface of the electric terminals 2042 contacts the chip second electric contact surface 1302, and the chip fourth electric contact surface 1304. As the developing cartridge 10 continues to move in the third direction toward the photosensitive drum 220 near the partition plate 203, the electric terminals 2042 can relatively move within the electric contact surface of the chip 131 of the "n" -shaped structural groove. One side of the circumferential cylindrical surface of the final electrical terminal 2042 in the third direction is in contact with the chip third electrical contact surface 1303, thereby ensuring that the electrical terminal 2042 is always electrically connected to at least one of the electrical contact surfaces of the chip 131 during movement of the developing cartridge 10 from the first position to the second position. Thereby effectively avoiding the problem that the developing cartridge chip 131 cannot be recognized by the image forming apparatus due to poor or erroneous electrical connection of the chip 131 of the developing cartridge 10 and the electrical terminal 2042. The electrical contact surface of the chip 131 adopting the structure of the above embodiment is electrically connected with the electrical connection terminal provided in the image forming apparatus all the time, so that the stability of the electrical connection between the chip 131 and the electrical terminal 2042 of the developing cartridge 10 can be ensured, thereby realizing the push-in mounting cavity of the developing cartridge, and the identification of the chip 131 can be realized when the cartridge body 110 of the developing cartridge moves from the first position to the second position.

The separation assembly 140 is provided on the cartridge body 110, and when the developing cartridge 10 is attached to the drum unit 20, the developing cartridge 10 receives a separation force applied by a separation force output member of the image forming apparatus through the separation assembly 140, abuts against the drum unit 20 and generates a force in a second direction, thereby separating the developing roller 15 from the photosensitive drum 220.

The separation assembly 140 includes a separation lever provided on the cartridge body 110 and movable on the cartridge body 110, and first and second cams provided at both ends of the separation lever, the image forming apparatus movably moves the separation lever on the cartridge body 110 by a second cam action of the separation assembly 140 by the separation force output member, and the first cam of the separation assembly 140 acts on the drum unit 20 to rotate the developing cartridge 10 on the drum unit 20 to separate the developing roller 15 from the photosensitive drum 220.

Next, a process in which the developing cartridge 10 is mounted in the drum unit 20 of the image forming apparatus, and the image forming apparatus drives the developing roller 15 of the developing cartridge 10 and the photosensitive drum 220 to be separated will be described.

In a state where the developing cartridge 10 is attached to the drum unit, the third protrusions and the electrode protrusions 151 are supported by the first support surface 2111 and the third support surface 2141, respectively, to bear the weight of the developing cartridge, and the first protrusions 18 are supported by the second support surface 2131 and the fourth support surface 2151, respectively, to bear the weight of the developing cartridge.

In a state where the developing cartridge 10 is attached to the drum unit 20 and mounted in the image forming apparatus, the lock member is restricted in rotation angle by the mounting bin side wall in the image forming apparatus, so that when the developing cartridge 10 moves upward, the lock member blocks the developing cartridge 10 from coming out of the drum unit 20 upward. When the developing cartridge 10 is attached only to the drum unit 20 without the drum unit 20 being mounted in the image forming apparatus, the rotation angle of the locking member is not limited, so that the user can manually pull the developing cartridge 10 upward from the drum unit 20 against the elastic force of the locking elastic member to rotate the locking member to disengage from the drum unit 20.

In the process of mounting the developing cartridge 10 to the drum unit 20, the third projection, the first projection 18, the second projection 19 and the electrode projection 151 are rotatable, so that the third projection, the first projection 18, the second projection 19 and the electrode projection 151 can be prevented from directly contacting and rubbing with the drum unit, sliding friction can be reduced, friction force can be reduced, and abrasion to the drum unit can be prevented.

Meanwhile, the force application part is contacted with the pressure receiving surface so as to apply forward pushing force to the pressure receiving surface, so that the whole box body 110 of the developing box is subjected to forward pushing force, and the box body 110 drives the developing roller 15 to be close to the photosensitive drum 220, thereby ensuring that the developing roller is in close contact with the photosensitive drum 220.

Meanwhile, the electrode protrusion 151 and the third protrusion sleeved on the left end part of the developing roller shaft can avoid the abrasion of the drum unit caused by the direct contact of the rotating developing roller shaft and the drum unit because the developing roller 15 needs to rotate in the working process.

When the separating force output member (typically, a force applying lever) of the image forming apparatus applies a separating force to the separating lever to the left in the first direction, the right end (second cam) of the separating lever receives the separating force provided by the separating force output member of the image forming apparatus, the separating force acts on the separating lever from the right to the left in the first direction, at this time, the separating lever moves from the right to the left at the guide groove 122, that is, from the end of the first side plate 201 to the end of the second side plate 202, the separating lever drives the first cam and the second cam to move from the left to the right in the first direction, and the first cam and the second cam abut against the drum unit, so that the developing cartridge moves from the first position to the second position relative to the drum unit, and the drum roller is separated.

In this process, the electrical contact surface on the developing cartridge 10 and the electrical contact assembly 204 are contacted by:

When the developing cartridge 10 is mounted on the drum unit 20, as the developing cartridge 10 moves in the third direction toward the photosensitive drum 220 near the partition plate 203, the electric terminals 2042 first pass the chip guide surface 1305, then the free ends of the electric terminals 2042 in the projecting direction in the second direction contact the chip first electric contact surface 1301, then the circumferential cylindrical surface of the electric terminals 2042 contacts the chip second electric contact surface 1302, and the chip fourth electric contact surface 1304.

As the developing cartridge 10 continues to move along the third direction toward the photosensitive drum 220 near the partition plate 203, the electric terminals 2042 can relatively move within the electric contact surfaces of the "n" -shaped structural grooves, and finally, one side of the circumferential cylindrical surface of the electric terminals 2042 along the third direction contacts the third electric contact surface 1303 of the chip, as shown in the figure, so as to ensure that the electric terminals 2042 are always electrically connected with at least one electric contact surface of the chip 131 during the process of moving the developing cartridge 10 from the first position to the second position, thereby effectively avoiding the problem that the chip 131 of the developing cartridge 10 cannot be recognized by the image forming apparatus due to poor or wrong electric connection of the chip 131 of the developing cartridge 10 with the electric terminals 2042.

Thus, the electric contact surface of the chip 131 adopting the structure of the above-described embodiment is always electrically connected to the electric terminal 2042 provided in the drum unit 20, and the stability of the electric connection of the chip 131 of the developing cartridge and the electric terminal 2042 can be ensured. Therefore, the developing box is pushed into the mounting cavity, and the chip 131 can be identified when the box body of the developing box moves from the first position to the second position.

Example two

As shown in fig. 12 and 13, another developing cartridge 10 is provided in the present embodiment, which is different from the first embodiment in that in the present embodiment, the structure of the chip 131 is different from that in the first embodiment, and the remaining structure is identical to that in the first embodiment.

Specifically, referring to fig. 13, the chip 131 includes a substrate 1311, an electrical contact surface and a memory cell, a chip mounting groove for mounting the chip 131 is provided on the chip holder 132, the substrate 1311 of the chip 131 is fixedly mounted in the chip mounting groove, the memory cell and the electrical contact surface are both fixedly mounted on a side surface of the substrate 1311 facing away from the chip mounting groove, and the memory cell is located between the electrical contact surface and the substrate 1311, i.e., the electrical contact surface is located outermost in the second direction, the electrical contact surface is electrically connected with the memory cell, and when the developing cartridge is mounted on the drum unit, the electrical contact surface is used for being electrically connected with the image forming apparatus for conveying information stored by the memory cell to the image forming apparatus when the drum unit is mounted on the image forming apparatus.

Further, the electrical contact surface includes a curved portion 1312 that is curved such that when the electrical contact surface abuts the electrical contact assembly 204 of the image forming apparatus, the curved portion 1312 is pressed to deform when the curved portion 1312 contacts the electrical terminal 2042, preventing the rigid contact from crushing the electrical terminal 2042. Specifically, in this embodiment, the electrical contact surface is made of metal, the electrical contact surface arches backward to form an arch, the arch includes a bending portion 1312 and an opening, a space is provided between the bending portion 1312 and the substrate 1311 in the second direction, the cross section of the bending portion 1312 is in a generally D-shaped structure, the bending portion 1312 can elastically recover in the second direction, the bending portion 1312 extends in the third direction on the electrical contact surface, and when the developing cartridge moves from the first position to the second position, the elastic deformation generated by the bending portion 1312 gradually recovers, so that the bending portion 1312 is ensured to always abut against the electrical terminal 2042 in the process of moving forward along with the developing cartridge, and error reporting of the image forming apparatus caused by disconnection of the electrical connection is avoided.

Next, a process of contacting and separating the chip 131 and the electrical contact member 204 when the developing cartridge 10 is mounted on the drum unit 20 of the image forming apparatus in the present embodiment will be described.

When the developing cartridge 10 is mounted on the drum unit 20, as the developing cartridge 10 moves in the third direction toward the photosensitive drum 220 near the partition plate 203, the bent portion 1312 of the electrical contact surface abuts against the electrical contact member 204 of the drum unit 20, and when the bent portion 1312 contacts the electrical terminal 2042, the bent portion 1312 is pressed to deform, preventing the rigid contact from crushing the electrical terminal 2042, because the bent portion 1312 extends in the third direction, the electrical terminal 2042 may abut against the bent portion 1312 at all times as the developing cartridge 10 continues to move in the third direction toward the photosensitive drum 220 near the partition plate 203, thereby ensuring that the electrical terminal 2042 is always electrically connected with at least one electrical contact surface of the chip 131 during the movement of the developing cartridge 10 from the first position to the second position.

When the developing cartridge 10 moves from the first position to the second position, the elastic deformation generated by the bending portion 1312 is gradually recovered, so that the bending portion 1312 is ensured to be always abutted against the electric terminal 2042 in the process of moving forward along with the developing cartridge 10, and error reporting of the image forming apparatus caused by disconnection of the electric connection is avoided.

Thus, the structure in this embodiment can realize that the electric contact surface of the chip 131 and the electric terminal 2042 provided in the drum unit 20 are always electrically connected, and can ensure the stability of the electric connection of the chip 131 of the developing cartridge and the electric terminal 2042. Therefore, the developing box is pushed into the mounting cavity, and the chip 131 can be identified when the box body of the developing box moves from the first position to the second position.

In this embodiment, the other structure of the developing cartridge 10 is the same as that of the first embodiment, and will not be described here.

Example III

As shown in fig. 14 and 15, another developing cartridge 10 is provided in this embodiment, which is different from the second embodiment in that in this embodiment, the structure of the chip 131 is different from that in the second embodiment, the electrical contact surface of the chip 131 is provided with a bent portion without the bending portion 1312 on the electrical contact surface, and the rest of the structure is identical to that in the second embodiment.

The electric contact surface is a bent portion, which is pressed to deform when the electric contact surface contacts the electric terminal 2042 when the electric contact surface contacts the electric contact member 204 of the image forming apparatus. Specifically, in this embodiment, the electrical contact surface is made of metal, the bending portion includes a fixing portion 1313 and a tilting portion 1314, the fixing portion 1313 is fixedly mounted on the substrate 1311, the tilting portion 1314 and the fixing portion 1313 are integrally formed and have an included angle therebetween, and a space is formed between the tilting portion 1314 and the fixing portion 1313 in the second direction, so that the cross section of the electrical contact surface is in a substantially V-shaped structure, and when the bending portion contacts the electrical terminal 2042, the tilting portion 1314 and the fixing portion 1313 can be elastically deformed to approach each other in the second direction, so as to avoid the electrical terminal 2042 from being crushed by rigid contact.

Further, the tilted portion 1314 extends in the first direction, and when the developing cartridge 10 is mounted on the drum unit 20, the tilted portion 1314 corresponds to the position of the electric contact member 204, and the tilted portion 1314 can be simultaneously contacted with the plurality of electric terminals 2042 to electrically connect the electric contact surface with the electric contact member 204.

Next, a description will be given of a process in which the image forming apparatus drives the chip 131 of the developing cartridge 10 to contact and separate from the electrical contact member 204 when the developing cartridge 10 is mounted on the drum unit 20 of the image forming apparatus in the present embodiment.

When the developing cartridge 10 is mounted on the drum unit 20, as the developing cartridge 10 moves in the third direction toward the photosensitive drum 220 near the partition plate 203, the raised portion 1314 of the electrical contact surface starts to abut against the electrical contact member 204 of the drum unit 20, as the developing cartridge 10 continues to move in the third direction toward the photosensitive drum 220 near the partition plate 203, the raised portion 1314 abuts against the electrical terminal 2042 so that the raised portion 1314 is elastically deformed by the forward pressure, the electrical terminal 2042 is prevented from being crushed by the rigid contact, and the raised portion 1314 is brought into close contact with the electrical terminal 2042.

When the developing cartridge 10 moves from the first position to the second position, the tilted portion 1314 is gradually separated from the electric terminal 2042, and the elastic deformation of the tilted portion 1314 is gradually recovered, so that the tilted portion 1314 still maintains contact with the electric terminal 2042 during the forward movement along with the developing cartridge 10, and the error of the image forming apparatus caused by the disconnection of the electric connection is avoided.

In this embodiment, the electrical contact surface of the chip 131 having the structure of the above-described embodiment is electrically connected to the electrical terminal 2042 provided in the drum unit 20 at all times, and the stability of the electrical connection between the chip 131 of the developing cartridge and the electrical terminal 2042 can be ensured. Therefore, the developing box is pushed into the mounting cavity, and the chip 131 can be identified when the box body of the developing box moves from the first position to the second position.

In this embodiment, the other structure of the developing cartridge 10 is the same as that in the second embodiment, and will not be described here.

Example IV

As shown in fig. 16 to 18, another developing cartridge 10 is provided in the present embodiment, which is different from the first embodiment in that in the present embodiment, the developing cartridge 10 is provided with the developing electrode 152 without the electrode projection 151, the developing electrode 152 is located at one end of the developing roller shaft outside the first side wall a in the first direction, and the rest of the structure is identical to the developing cartridge structure of the first embodiment.

Specifically, referring to fig. 18, in the present embodiment, the developing electrode 152 is composed of a movable member 1521 and a conductive member 1522, and a fixed conductive member 1523, the movable member 1521 is capable of being displaced in a second direction, the fixed conductive member 1523 and the conductive member 1522 are made of conductive materials, preferably, the fixed conductive member 1523 and the conductive member 1522 may be formed of conductive resins, the conductive member 1522 and the fixed conductive member 1523 are easily designed in a complex shape, the fixed conductive member 1523 may be fixedly provided on a first side wall a, which is connected to a developing roller shaft, the fixed conductive member 1523 is connected to one end of the movable member 1521 which is detachably connected, the conductive member 1522 is connected to the other end of the movable member 1521 which is detachably connected, and the conductive member 1522 is movable to the fixed conductive member 1523 along the elastic axis direction of the movable member 1521 by the movable member 1521. Or in some other embodiments, instead of the conductive resin, a metal may be used as the material of the conductive member 1522 and the fixed conductive member 1523.

Further, the second side plate 202 of the mounting chamber 210 of the drum unit 200 is provided with the electric connection portion 205 alone, not the entire second side plate, and the fixed conductive member 1523, the conductive member 1522, and the movable member 1521 are made of conductive materials, so that the developing electrode 152 can be electrically connected to the drum unit 200 all the time until the conductive member 1522 comes into contact with the separately provided electric connection portion 205 until the developing cartridge 10 is removed from the mounting chamber 210. When the developing cartridge 10 is mounted in the mounting chamber 210, the developing electrode 152 is electrically connected to the second side plate of the drum unit 200, the developing electrode 152 forms an electrically connected relationship between the drum unit 200 and the developing roller 15, the developing electrode 152 is an electrode for applying a developing bias to the developing roller 15, and as can be seen from fig. 19, even though the developing cartridge 10 is mounted to the mounting chamber 210 throughout, the conductive member 1522 is movable together with the movable member 1521 in the second direction due to the interaction of the movable member 1521 and the conductive member 1523, thereby enabling the conductive member 1522 to be always electrically connected to the second side plate of the drum unit 200.

Therefore, the developing electrode 152 provided in the present embodiment can ensure the stability of the connection of the developing roller 15 of the developing cartridge 10 with the electric connection portion 205. Thereby realizing that the developing cartridge 10 is pushed into the mounting chamber 210, and the developing roller 15 can be kept energized when the cartridge body 110 of the developing cartridge is moved from the first position to the second position.

In this embodiment, the other structure of the developing cartridge 10 is the same as that of the first embodiment, and will not be described here.

Example five

As shown in fig. 19 and 20, another developing cartridge 10 is provided in the present embodiment, which is different from the first embodiment in that in the present embodiment, the developing cartridge 10 is provided with the escape groove 124, and the remaining structure is identical to the first embodiment.

Specifically, the escape groove 124 is provided at the first end c of the developing cartridge 10, the escape groove 124 is recessed in the third direction at the first end c of the developing cartridge 10, and is of a substantially square structure at the first end c of the developing cartridge 10, the escape groove 124 also penetrates the first end c of the developing cartridge 10 in the second direction, so that the pressing portion 3 of the image forming apparatus does not interfere with the developing cartridge 10 in the opposite direction of the third direction, and the pressing portion 3 is not interfered by the developing cartridge 10 during the mounting of the drum unit 20 and the developing cartridge 10 in the third direction, and is not interfered when moving above the developing cartridge 10 in the second direction.

Further, two escape grooves 124 provided spaced apart from each other in the first direction at the first end c of the developing cartridge 10, the two escape grooves 124 being respectively adjacent to the first side wall a and the second side wall b of the cartridge body 110 and corresponding to the positions of the two pressing portions 3 provided to the image forming apparatus, can escape from the pressing portions 3 of the image forming apparatus.

Next, a description will be given of a process of fitting the escape groove 124 with the pressing portion 3 when the developing cartridge 10 and the drum unit 20 are mounted in the image forming apparatus in the present embodiment.

When the developing cartridge 10 is positioned at the third position with respect to the mounting chamber 210, in which the developing roller 15 is not in contact with the photosensitive drum 220, the drum unit holder 200 is mounted to the image forming apparatus in a state in which the developing cartridge 10 is positioned at the third position, the pressing portion 3 of the image forming apparatus is disposed above the mounting chamber 210, that is, the developing cartridge 10 is completely mounted into the mounting chamber 210 of the drum unit 200, when the drum unit holder 200 is mounted to the image forming apparatus, the pressing portion 3 is positioned above the first end c of the developing cartridge 10 in the third direction, and according to the operation or movement of the drum unit holder 200, the pressing portion 3 partially overlaps the developing cartridge 10 in the third direction, but because the developing cartridge 10 is provided with the escape groove 124 corresponding to the position of the pressing portion 3, the pressing portion 3 of the image forming apparatus enters into the escape groove 124 in the third direction, the pressing portion 3 does not contact with the developing cartridge 10, and when the developing cartridge 10 moves along with the mounting chamber 210 of the drum unit 200 in the opposite direction of the second direction, the portion 3115 of the image forming apparatus just passes through the escape groove 124 of the developing cartridge 10, the two pressing portions 10 are completely separated from each other by the escaping groove 10 in the third direction, and the image forming apparatus is prevented from interfering with each other in the developing cartridge 10.

When the developing roller 15 is required to be in contact with the photosensitive drum 220, this is achieved by simply manually pressing down the developing cartridge 10 in the third direction, and the cartridge body of the developing cartridge 10 is moved from the third position to the fourth position where the developing roller 15 is in contact with the photosensitive drum 220. Or in some embodiments, the developing cartridge 10 is moved downward in a third direction toward a direction approaching the photosensitive drum 220 by gravity to achieve a contact state of the developing roller 15 with the photosensitive drum 220.

Further, since the positions where the pressing portions 3 are provided in the image forming apparatuses of different models are also different, in other embodiments, the escape grooves 124 of the developing cartridge 10 may be provided at both ends of the developing cartridge 10, that is, the escape grooves on the developing cartridge 10 may be determined according to the positions of the pressing portions 3 of the image forming apparatus, which is not particularly limited herein.

The design of the avoidance groove 124 in this embodiment is simple in structure, and completely realizes that the developing cartridge 10 has fallen into the mounting cavity of the drum unit bracket 200 outside the image forming apparatus. It is possible to avoid the collision of the photosensitive drum 220 by the impact in the third direction caused by the interference of the developing cartridge 10 and the drum unit bracket 200 moving together with the pressing portion 3 of the image forming apparatus, thereby affecting the development printing of the photosensitive drum 220. In this embodiment, the other structure of the developing cartridge 10 is the same as that of the first embodiment, and will not be described here.

Example six

As shown in fig. 21 and 22, another developing cartridge 10 is provided in this embodiment, and the first embodiment is different from the first embodiment in that the first stirring frame 161 drives the second stirring frame 162 by means of the first stirring blade 1611, and has no first transmission portion and no second transmission portion.

Specifically, the first stirring frame 161 is rotatably supported by the first side wall a and the second side wall b of the box body 110, the right end of the first stirring frame 161 is fixedly connected with the first stirring gear, the first stirring frame 161 is provided with a first stirring blade 1611, the second stirring frame 162 is rotatably supported by the first side wall a and the second side wall b of the box body 110, the second stirring frame 162 is provided with a second stirring blade 1621, at least part of the second stirring blade 1621 is located on a rotation track W of the first stirring blade 1611, that is, the second stirring blade 1621 is at least partially overlapped with the projection of the rotation track W of the first stirring blade 1611 in the first direction, and when the first stirring frame 161 rotates, the second stirring blade 162 is touched by the second stirring blade in the rotation process of the first stirring blade due to the interference of the first stirring blade 1611 and the second stirring blade 1621, so as to drive the second stirring frame 162 to rotate. The number of the second stirring blades is preferably three, and the included angles between the adjacent second stirring blades are set to be 120 degrees, so that the second stirring blades are uniformly distributed at intervals. Alternatively, the number of the second stirring vanes may be set to other numbers but at least one.

Further, the rotation axis of the second stirring frame 162 is disposed at a position closer to the toner feeding roller than the first stirring frame 161, that is, the second stirring frame 162 is located below the first stirring frame 161, so that the developer accumulated near the toner feeding roller can be stirred when the second stirring blade rotates.

In this embodiment, the stirring structure is configured as the first stirring member and the second stirring frame 162, and by the rotation of the second stirring frame 162, the developer in the region where sufficient stirring cannot be achieved only by the rotation of the first stirring member can be stirred, so that the developer can be stirred and the development work can be ensured even when the remaining amount of the developer in the developer cartridge 10 is low.

In this embodiment, the other structure of the developing cartridge 10 is the same as that of the first embodiment, and will not be described here.

Example seven

As shown in fig. 23 to 26, another developing cartridge 10 is provided in the present embodiment, which is different from the sixth embodiment in that a second stirring tooth 1622 and an elastic member 1623 are further provided at one end of the second stirring frame 162, and the projection of the movement locus of the second stirring blade 1621 and the first stirring blade 1611 in the first direction is not overlapped.

Specifically, the second stirring frame 162 has a hollow accommodating portion 1624 at one end, a first groove 16241 is further provided on a circumferential wall constituting the hollow accommodating portion 1624, an annular accommodating portion 16243 is further provided on a radial outer periphery of the hollow accommodating portion 1624, and a second groove 16242 is further provided on an outer circumferential wall constituting the annular accommodating portion 16243, preferably, at least one of the first grooves is provided, and may be determined according to the number of power transmission rods 16224 to be described later. The second stirring teeth 1622 are provided with a cylindrical engagement portion 16223 on a side thereof adjacent to the second side wall b in the first direction, the cylindrical engagement portion 16223 is further provided with a power transmission rod 16224 extending radially outwardly along the axis of the second stirring teeth 1622, the second stirring teeth 1622 are further provided with a second driving protrusion 16221 on a side thereof remote from the second side wall b in the first direction, and the second stirring teeth 1622 are further provided with a third groove 16222. The elastic member 1623 includes a main body, a first abutting portion 16231, and a second abutting portion 16232, the main body of the elastic member 1623 is mounted in the annular accommodating portion 16243, and the first abutting portion 16231 is mounted in the second groove 16242. The cylindrical engagement portion 16223 of the second stirring teeth 1622 is mounted to the hollow accommodation portion 1624 in the first direction while the power transmission rod 16224 is engaged with the first groove 16241, so that the second stirring teeth 1622 and the second stirring frame 162 are relatively fixedly disposed, i.e., so that the second stirring teeth 1622 and the second stirring frame 162 do not relatively rotate, and so that the second stirring teeth 1622 can transmit a driving force to the second stirring frame 162. At this time, the second abutting portion 16232 of the elastic member 1623 is just disposed in the third groove 16222 of the second stirring tooth 1622.

The transmission assembly 120 further includes a first transmission member 126, a second transmission member 127, the first transmission member 126 and the second transmission member 127 are also provided outside the first side wall a with a developing gear 1211, a powder feeding gear 1212, and a first stirring gear 1215, the first transmission member 126 being formed as a gear meshing with the small diameter gear portion, and the second transmission member 127 being formed as a gear meshing with the second transmission member. Meanwhile, the end of the second transmission member 127 remote from the first side wall a is further provided with a first driving protrusion 1271, and the first driving protrusion 1271 protrudes radially outwardly along the axis of the second transmission member 127.

When the driving portion receives the rotation of the driving force axis from the image forming apparatus, the developing gear 1211, the powder feeding gear 1212, and the first stirring gear 1215 engaged with the driving portion rotate, and the first transmission member 126 and the second transmission member 127 are rotated by the rotation of the first stirring gear 1215. The first driving protrusion 1271 transmits power to the second driving protrusion 16221 through the rotation of the second transmission member 127, and thus drives the second stirring teeth 1622 to rotate, and the second stirring teeth 1622 transmit power to the second stirring frame 162 through the power transmission rod 16224.

In the rotation process of the second stirring frame 162, the elastic member 1623 deforms in the rotation direction, and after the second transmission member 127 drives the second stirring teeth 1622 to rotate by a certain angle, the first driving protrusion 1271 is separated from the second driving protrusion 16221, and the second stirring frame 162 drives the second stirring frame 162 and the second stirring teeth 1622 to rotate in a direction opposite to the rotation direction under the restoring force of the elastic member 1623. Accordingly, the second stirring frame 162 is reciprocally rotated by the driving force provided by the driving part and the restoring force of the elastic member 1623.

Or in some other embodiments, the right end of the second stirring frame 162 extends out of the second side wall b of the box body 110, the right end of the second stirring frame 162 is coaxially and fixedly provided with a second stirring tooth 1622, no elastic part 1623 is arranged between the second stirring tooth 1622 and the second stirring frame 162, protrusions interfering with each other are arranged on the second stirring tooth 1622 and the second transmission part 127, when the first stirring tooth 1215 rotates, the first transmission part 126 drives the second transmission part 127 to rotate, and the protrusions on the second transmission part 127 interfere with the protrusions on the second stirring tooth 1622 to push the second stirring tooth 1622 to rotate, so that the second stirring frame 162 rotates.

Or in some other embodiments, the second transmission member 127 may be omitted, and the diameter of the first transmission member 126 may be increased, and a power transmission protrusion may be provided at one end of the first transmission member 126.

Alternatively, referring to fig. 26, in some other embodiments, the first stirring teeth 1215 may include a large diameter portion and a small diameter portion, the small diameter portion may be closer to the first sidewall a than the large diameter portion, the large diameter portion may be formed as a large diameter gear portion, and the small diameter portion may be formed as a cylindrical portion having a certain roughness on a cylindrical surface. The second stirring teeth 1622 are disposed at one end of the second stirring frame 162 near the first side wall a in the first direction, and the second stirring teeth 1622 are formed into a cylinder shape with a certain roughness on the cylindrical surface, the diameter of the second stirring teeth 1622 is smaller than the small diameter portion of the first stirring gear 125, the first transmission member 126 is an annular transmission belt, and two ends of the first transmission member 126 in the second direction are respectively sleeved on the small diameter portion of the first stirring teeth 1215 and the second stirring teeth 1622, that is, the first stirring teeth 1215 transmit the driving force to the second stirring teeth 1622 through the first transmission member 126, so that the second stirring teeth 1622 drive the second stirring frame 162 to rotate together.

In this embodiment, the arrangement of the second stirring teeth 1622 and the elastic member 1623, the arrangement of the first transmission member 126 and the second transmission member 127 can simplify the arrangement of the transmission structure of the developing cartridge 10 to a certain extent, and further simplify the parameter design of the transmission structure.

Further, by directly connecting the first stirring teeth 1215 to the second stirring teeth 1622 via a belt, the first and second transmission members can be omitted, and in this embodiment, the first transmission member 126 can be changed from a toothed shape to a belt to connect the first stirring teeth 1215 to the second stirring teeth 1622, and the second transmission member 127 can be omitted.

In this embodiment, the other structure of the developing cartridge 10 is the same as that in the sixth embodiment, and will not be described here.

The utility model discloses a developing box, which is characterized in that an electric contact surface is provided with an n-shaped structural groove or an arched part or a bending part, so that when a chip frame is kept motionless, the developing box can be contacted with an electric terminal on a drum unit when being arranged at a first position and a second position and can not be in hard contact with the electric terminal, and the results of information identification failure and the like caused by hard contact damage of the electric terminal can be effectively prevented.

What has been described above is merely some embodiments of the present utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.

Claims (13)

1. A developing cartridge detachably mountable to an image forming apparatus including a drum unit and an electric terminal, the developing cartridge comprising:

A cartridge having a receiving chamber for storing a developer, the cartridge having a first sidewall and a second sidewall along a first direction, a first surface and a second surface in a second direction, and a first end and a second end in a third direction;

A developing roller rotatable about an axis extending in a first direction, the developing roller being closer to the first end than the second end in a third direction;

A power receiving portion provided at a second side wall of the casing for receiving a driving force from the image forming apparatus;

The chip is arranged on the chip frame, the chip frame is arranged on the first side wall of the box body, and the chip comprises an electric contact surface which can be electrically connected with the image forming device through the electric terminal.

2. A developing cartridge according to claim 1, wherein said chip is provided with an "n" shaped groove, said electric contact surface being provided in said "n" shaped groove, an opening of said "n" shaped groove being directed toward said developing roller in a third direction.

3. A developing cartridge according to claim 2, wherein said electric terminal extends into said "n" shaped groove when said developing cartridge is mated with said image forming apparatus, and said electric contact surface abuts against a side wall of said electric terminal to complete electric connection of said electric contact surface with said image forming apparatus.

4. A developing cartridge according to claim 1, wherein said electrical contact surface on said chip is movable in a second direction relative to said cartridge body, said chip further comprising a substrate and a memory die, said electrical contact surface being disposed on said substrate, said electrical contact surface being electrically connected to said memory die.

5. A developing cartridge according to claim 4, wherein said electric contact surface is a bent portion including a fixed portion connected to said substrate and a tilted portion forming an angle with said fixed portion, said tilted portion being capable of abutting said electric terminal, and said tilted portion being capable of moving back and forth with respect to the cartridge body in the second direction.

6. A developing cartridge according to claim 4, wherein said electric contact surface is arcuate, said arcuate including an opening facing said base plate in the second direction and a curved portion movable back and forth relative to said cartridge body in the second direction.

7. A developing cartridge according to claim 1, wherein said developing is further provided with a stirring frame including a first stirring frame and a second stirring frame, said second stirring frame being located between said first stirring frame and said developing roller in a third direction, said first stirring frame being provided with first stirring teeth capable of receiving a driving force transmitted from said power receiving portion to rotate the first stirring frame.

8. A developing cartridge according to claim 7, wherein said first stirring frame has a first stirring blade thereon, said second stirring frame has a second stirring blade thereon, a projection of a rotation locus of said first stirring blade in a first direction interferes with a projection of a rotation locus of said second stirring blade in a first direction, and said first stirring frame can stir said second stirring blade by said first stirring blade when rotated, thereby rotating said second stirring frame.

9. A developing cartridge according to claim 7, wherein said second stirring frame is provided with second stirring teeth, said first stirring teeth are connected with said second stirring teeth by a belt, and said first stirring teeth can rotate by said belt to rotate said second stirring teeth, thereby rotating said second stirring frame.

10. A developing cartridge according to claim 9, wherein a first transmission member and a second transmission member are further provided between said first stirring teeth and said second stirring teeth, a first driving projection is provided on said second transmission member, a second driving projection is provided on said second stirring teeth, said first driving projection interferes with the rotation locus of said second driving projection, said first stirring teeth rotate to drive said first transmission member and said second transmission member to rotate, and said second transmission member drives said second stirring teeth to rotate by said first driving projection to drive said second stirring teeth to rotate.

11. A developing cartridge according to claim 10, wherein said second stirring frame is further provided with an elastic member interposed between said second stirring teeth and said cartridge body, said elastic member being capable of being compressed when said second stirring teeth are engaged with said second transmission member so that the second stirring frame is rotated, and being released when said second stirring teeth are engaged with said second transmission member so that the second stirring frame is rotated in a direction opposite to a direction in which the elastic member is compressed.

12. A developing cartridge according to claim 1, wherein said developing cartridge is symmetrically provided with escape grooves in a first direction, said escape grooves extending in a third direction, and a pressing portion on said image forming apparatus is engageable with said escape grooves when said developing cartridge is mounted to said image forming apparatus together with said drum unit, so that said developing cartridge does not receive a force of said pressing portion.

13. A developing cartridge according to claim 1, further comprising a developing electrode including a movable member and a conductive member, said conductive member being connected to said developing cartridge through said movable member, said movable member being displaceable in a second direction, said conductive member being electrically connectable to said drum unit.