Developing box

Abstract

The developing box comprises a box body, a developing assembly, a separating assembly and an identifying assembly, the box body is used for storing a developing agent, the developing assembly comprises a developing roller used for being matched with a photosensitive drum for developing and imaging, and the separating assembly comprises a separating rod movably installed on the box body. The separating rod can receive the separating force of the image forming equipment, move on the box body and push the developing box to rotate, the identification assembly comprises a chip, and the chip can move relative to the drum unit in the developing box and is electrically connected with the drum unit. According to the developing box disclosed by the utility model, the electric contact surface can be contacted with the electric terminal on the drum unit without hard contact with the electric terminal when the developing box is arranged on the drum unit, the first position and the second position under the condition of keeping the chip rack immovable; and information identification failure and other results caused by hard contact damage to the electric terminal can be effectively prevented.

Description

Technical Field

[0001] The utility model relates to the field of image forming equipment, in particular to a developing box. Background Art

[0002] An electrophotographic image forming apparatus includes a cartridge for developing an electrostatic latent image on a photosensitive drum using toner. The cartridge has a developing roller rotatably supported in its housing, and toner stored in the housing is supplied from the developing roller to the photosensitive drum for development.

[0003] During the printing process, in order to ensure normal printing, the developing roller and the photosensitive drum need to be in close contact. When printing is finished, the developing roller and the photosensitive drum need to be separated by a certain distance to avoid the developing roller and the photosensitive drum from being in contact for a long time, which may cause the photosensitive drum to be contaminated by the excess developer attached to the developing roller, or the developing roller to be deformed or the photosensitive drum to be worn.

[0004] Each developing box includes a memory and an electrical contact surface. For example, the memory may be an integrated circuit (IC) chip. The drum unit (drum box) to which the developing box is attached is attached to the imaging device. When the box body of the developing box is in the second position, that is, when the developing roller contacts the photosensitive drum, the electrical contact surface contacts the electrical terminal provided in the image forming device, and the image forming device can read the information of the developing box. When the box body of the developing box is in the first position, the electrical contact surface does not contact the electrical terminal provided in the image forming device. If the electrical contact surface is out of contact with the electrical terminal on the drum unit, the image forming device will report an error.

[0005] Therefore, a technical solution to the above problems is needed. Utility Model Content

[0006] In order to solve the technical problems existing in the prior art, the purpose of the utility model is to provide a developing box to solve the above-mentioned technical problems.

[0007] In order to achieve the purpose, the utility model adopts the following technical solutions:

[0008] A developing cartridge is detachably mounted in an image forming device, the image forming device comprising a drum unit and an electrical terminal, the developing cartridge comprising:

[0009] A box body, the box body having a receiving cavity for storing a developer, the box body having a first side wall and a second side wall 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;

[0010] a developing roller rotatable about an axis extending in a first direction, wherein in a third direction, the developing roller is closer to the first end than to the second end;

[0011] A power receiving portion, disposed on the second side wall of the box body, for receiving a driving force from the image forming device;

[0012] The chip is arranged on a chip frame, the chip frame is arranged on the first side wall of the box body, the chip comprises an electrical contact surface, and the electrical contact surface can be electrically connected to the image forming device through the electrical terminal.

[0013] Preferably, an “n”-shaped groove is provided on the chip, the electrical contact surface is provided in the “n”-shaped groove, and the opening of the “n”-shaped groove faces the developing roller in the third direction.

[0014] Preferably, when the developing box cooperates with the image forming device, the electrical terminal extends into the "n"-shaped groove, and the electrical contact surface abuts against the side wall of the electrical terminal to complete the electrical connection between the electrical contact surface and the image forming device.

[0015] Preferably, the electrical contact surface on the chip is movable relative to the box body in a second direction, the chip further comprises a substrate and a storage chip, the electrical contact surface is arranged on the substrate, and the electrical contact surface is electrically connected to the storage chip.

[0016] Preferably, the electrical contact surface is a bending portion, which includes a fixed portion connected to the substrate and a raised portion forming an angle with the fixed portion, the raised portion can abut against the electrical terminal, and the raised portion can move back and forth relative to the box body in the second direction.

[0017] Preferably, the electrical contact surface is arched, the arch comprises an opening and a curved portion, the opening faces the substrate in the second direction, and the curved portion can move back and forth relative to the box body in the second direction.

[0018] Preferably, the developer is also provided with a stirring frame, and the stirring frame includes a first stirring frame and a second stirring frame. In the third direction, the second stirring frame is located between the first stirring frame and the developing roller, and the first stirring frame is provided with a first stirring tooth. The first stirring tooth can receive the driving force transmitted by the power receiving part to drive the first stirring frame to rotate.

[0019] Preferably, the first stirring frame has a first stirring blade, and the second stirring frame has a second stirring blade, the projection of the rotation trajectory of the first stirring blade in the first direction partially interferes with the projection of the rotation trajectory of the second stirring blade in the first direction, and when the first stirring frame rotates, the first stirring blade can move the second stirring blade, thereby driving the second stirring frame to rotate.

[0020] Preferably, the second stirring frame is provided with second stirring teeth, and the first stirring teeth are connected to the second stirring teeth by a belt. When the first stirring teeth rotate, they can drive the second stirring teeth to rotate through the belt, thereby driving the second stirring frame to rotate.

[0021] Preferably, a first transmission member and a second transmission member are further arranged between the first stirring tooth and the second stirring tooth, the second transmission member is provided with a first driving protrusion, and the second stirring tooth is provided with a second driving protrusion, the rotation trajectories of the first driving protrusion and the second driving protrusion interfere with each other, the rotation of the first stirring tooth drives the first transmission member and the second transmission member to rotate, the second transmission member drives the second stirring tooth to rotate through the first driving protrusion to drive the second driving protrusion, and then drives the second stirring frame to rotate.

[0022] Preferably, the second stirring frame is further provided with an elastic member between the second stirring teeth and the box body, and the elastic member can be compressed when the second stirring teeth cooperate with the second transmission member to rotate the second stirring frame, and the elastic member is released after the second stirring teeth and the second transmission member complete the cooperation, so that the second stirring frame rotates in a direction opposite to the direction in which the elastic member is compressed.

[0023] Preferably, the developing box is symmetrically provided with avoidance grooves in a first direction, and the avoidance grooves extend along a third direction. When the developing box is installed on the image forming device together with the drum unit, the pressure-applying portion on the image forming device can cooperate with the avoidance grooves so that the developing box does not receive the force of the pressure-applying portion.

[0024] Preferably, the developing box further comprises a developing electrode, the developing electrode comprises a movable part and a conductive part, the conductive part is connected to the developing box via the movable part, the movable part can be displaced in the second direction, and the conductive part can be electrically connected to the drum unit.

[0025] The developing box in the utility model has an electrical contact surface that is set as an n-type structural groove or an arch or a bending portion on the electrical contact surface, so that 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, it can contact the electrical terminal on the drum unit without hard contact with the electrical terminal, which can effectively prevent the failure of information recognition caused by hard contact damaging the electrical terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 For existing drum units Figure 1 ;

[0028] Figure 2 For existing drum units Figure 2 ;

[0029] Figure 3 The three-dimensional image of the developing box in the first embodiment of the utility model Figure 1 ;

[0030] Figure 4 This is a schematic diagram of a developing box transmission assembly in Embodiment 1 of the present utility model;

[0031] Figure 5 The three-dimensional image of the developing box in the first embodiment of the utility model Figure 2 ;

[0032] Figure 6 Figure 5 A schematic diagram of the enlarged structure of the A position in the middle;

[0033] Figure 7 This is a three-dimensional diagram of the developing cartridge installed behind the drum unit in the first embodiment of the utility model;

[0034] Figure 8 for Figure 7 A schematic diagram of the enlarged structure of position B in the middle;

[0035] Fig. 9 It is a side view of the chip of the developing box and the electrical contact assembly of the drum unit in the first embodiment of the present utility model starting to cooperate;

[0036] Fig.10 It is a schematic diagram of the three-dimensional structure of the chip of the developing box and the electrical contact assembly of the drum unit in the first embodiment of the utility model;

[0037] Fig.11 This is a schematic diagram of the structure in which the electrical contact assembly of the drum unit in the first embodiment of the utility model is inserted into the chip of the developing box;

[0038] Fig.12 It is a three-dimensional diagram of the developing box in the second embodiment of the utility model;

[0039] Fig.13 for Fig.12 Schematic diagram of the enlarged structure of the C position in the middle;

[0040] Fig.14 It is a three-dimensional diagram of the developing box in the third embodiment of the present utility model;

[0041] Fig.15 for Fig.14 A schematic diagram of the enlarged structure of the D position in the middle;

[0042] Fig.16 It is a three-dimensional diagram of the developing box in the fourth embodiment of the present utility model;

[0043] Fig.17 for Fig.16 A schematic diagram of the enlarged structure of the E position in the middle;

[0044] Fig.18 It is a three-dimensional diagram of the developing cartridge installed on the drum unit in the fourth embodiment of the present utility model;

[0045] Fig.19 The structure diagram of the cooperation between the developing box and the pressure applying part in the fifth embodiment of the utility model is shown in FIG. Figure 1 ;

[0046] Fig. 20 The structure diagram of the cooperation between the developing box and the pressure applying part in the fifth embodiment of the utility model is shown in FIG. Figure 2 ;

[0047] Fig.21 This is a schematic diagram of the exploded structure of the developing box in the sixth embodiment of the present utility model;

[0048] Fig. 22 This is a schematic diagram of the structure of the cooperation between the first stirring frame and the second stirring frame in the sixth embodiment of the utility model;

[0049] Fig.23 This is an exploded schematic diagram of the second side wall of the developing box in the seventh embodiment of the present utility model;

[0050] Fig.24 This is a schematic diagram of the structure of the cooperation between the second stirring frame and the transmission member in the seventh embodiment of the utility model;

[0051] Fig.25 The structure diagram of the second stirring frame and the transmission member in the seventh embodiment of the utility model is shown in FIG. Figure 1 .

[0052] Fig.26 The structure diagram of the second stirring frame and the transmission member in the seventh embodiment of the utility model is shown in FIG. Figure 2 .

[0053] In the figure: 10, developer box; 110, box body; 11, first protective cover; 12, front end cover; 13, powder outlet; 15, developer roller; 18, first protrusion; 19, second protrusion; 112, forced pushing part; 120, transmission assembly; 121, power receiving part; 1211, developer gear; 1212, powder feeding gear; 1213, driving gear; 1214, idler; 1215, first stirring tooth; 122, guide groove; 123, fixing part; 124, avoidance groove; 125, first stirring gear; 126, first transmission member; 127, second transmission member; 1271, first driving protrusion; 130, identification assembly; 131, chip; 1311, substrate; 1312, bending part; 1313, fixing part; 1314, tilting part; 132, chip frame; 1301 chip first electrical contact 1302, chip second electrical contact surface; 1303, chip third electrical contact surface; 1304, chip fourth electrical contact surface; 1305, chip guide surface; 1306, notch; 140, separation component; 151, electrode protrusion; 152, developing electrode; 1521, movable part; 1522, conductive part; 1523, fixed conductive part; 161, first stirring frame; 162, second stirring frame; 1622, second stirring tooth; 16221, second driving protrusion; 16222, third groove; 16223, columnar joint; 16224, power transmission rod; 1623, elastic part; 16231, first abutment; 16232, second abutment; 1624, hollow accommodation; 16241, first groove; 16243, annular accommodation; 16242, second groove;

[0054] 20, drum unit; 200, drum unit bracket; 210, mounting cavity; 220, photosensitive drum; 201, first side plate; 201A, first recess; 201B, through hole; 202, second side plate; 202A, second recess; 203, mounting cavity plate; 211, forced push member; 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, electrical contact assembly; 2041, electrical connector; 2042, electrical terminal; 205, electrical connector;

[0055] 3. Pressure part. DETAILED DESCRIPTION

[0056] In order to better understand the technical solution of the present utility model, the embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0057] It should be clear that the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0058] like Figure 1 to Figure 2 As shown, the drum unit 20 includes a drum unit bracket 200 and a photosensitive drum 220. The drum unit 20 is provided with an installation cavity 210 for installing the developer cartridge 10. The developer cartridge 10 is detachably fixed in the installation cavity 210 through the opening of the installation cavity 210. The photosensitive drum 220 can form an electrostatic latent image on the surface. The developer cartridge 10 can cooperate with the drum unit 2 to develop and form an image, and the drum unit 20 can be pulled out and installed in the image forming device. The drum unit 20 is an existing structure, so below, only a brief description of the partial structure of the drum unit 20 is given below, and in order to better explain the various components of the drum unit 20, the left and right direction of the drum unit 20 (also the axial direction of the photosensitive drum 220) is configured as a first direction, the front and rear direction of the drum unit 20 (also the pulling direction of the drum unit 20) is a second direction, and the height direction of the drum unit 20 (also the disassembly direction of the developer cartridge 10) is a third direction. 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-back 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-back direction, and the up-down direction.

[0059] The drum unit bracket 200 includes a first side plate 201, a second side plate 202 and a partition plate 203. The first side plate 201 and the second side plate 202 are arranged opposite to each other in the first direction and are spaced apart from each other, the first side plate 201 and the second side plate 202 both 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 plates 203 extend in the first direction, and the partition plates 203 can separate the space formed between the first side plate 201 and the second side plate 202 in the second direction, that is, form an installation cavity 210 on the drum unit bracket 200.

[0060] The photosensitive drum 220 is disposed between the first side plate 201 and the second side plate 202 in the first direction and is rotatable along a rotation axis parallel to the first direction. When the developing cartridge 10 is attached to the mounting cavity 210, the developing roller 15 contacts the photosensitive drum 220 to complete the developing operation.

[0061] The image forming device can generally be provided with one or more detachable developing cartridges 10, so the drum unit 20 can also have at least one mounting cavity 210. When there are multiple mounting cavities 210, the multiple mounting cavities 210 are arranged in parallel along the second direction of the drum unit, and each mounting cavity 210 is used to fix a developing cartridge 10. That is to say, at least one developing cartridge 10 can be correspondingly arranged on the drum unit 20, and each developing cartridge 10 can accommodate developers of different colors, such as BK\C\M\Y, etc. Preferably, in the present embodiment, the image forming device can be provided with four developing boxes 10, so three partition plates 203 are provided on the drum unit bracket 200 of the drum unit 2, and the partition plates 203 are plate-shaped. The partition plates 203 separate four installation cavities 210 on the drum unit bracket 200 for accommodating developing boxes 10 storing developers of different colors; and a plurality of photosensitive drums 220 are provided in the drum unit bracket 200, and the plurality of photosensitive drums 220 are arranged in a first direction between the first side plate 201 and the second side plate 202, that is, a photosensitive drum 220 is rotatably provided in each installation cavity 210.

[0062] The first side plate 201 is plate-shaped, and has first recesses 201A and through holes 201B that are the same in number and correspond one to one with the mounting cavities 201. Each through hole 201B penetrates the first side plate 201 in the first direction, and when each developing cartridge 10 is attached to the mounting cavity 210, each developing cartridge 10 can receive the driving force of the image forming device through the through hole 201B.

[0063] The second side plate 202 is also plate-shaped, and has a second recess 202A formed corresponding to each mounting cavity in the plurality of mounting cavities 210. Each second recess 202A penetrates the second side plate 202 in the first direction, and is recessed toward the corresponding photosensitive drum 220 in the third direction. When each developing box 10 is attached to the corresponding mounting cavity 210, the chip 131 and the chip frame 132 (described in detail later) arranged on the developing box 10 are positioned in the corresponding second recess 202A.

[0064] The second side plate 12 is also provided with an electric contact assembly 204, which is arranged in the second recess 202A. The electric contact assembly 204 includes an electric connector 2041, an electric terminal 2042, an electric contact elastic member and a transmission terminal. The electric terminal 2042 is telescopically installed in the second recess 202A. The electric terminal 2042 can be telescopically installed along the second direction, and the front end of the electric terminal 2042 extends out of the front surface of the second recess 202A. The rear end of the electric terminal 2042 is connected to and electrically contacts the electric connector 2041. The electric contact elastic member is used to keep the front end of the electric terminal 2042 extending out of the front surface of the second recess 202A. The electric connector 2041 is also electrically connected to the transmission terminal, and the transmission terminal is used to electrically contact the receiving terminal in the image forming device when the drum unit is installed in the image forming device.

[0065] The mounting cavity 210 has a plurality of supporting surfaces. When each developing box 10 is attached to the mounting cavity 210, each developing box 10 is supported or locked by the supporting surfaces. Each supporting surface is configured to receive the weight of the developing box 10 in the mounting cavity 210, so that the developing box 10 can be rotatably mounted in the mounting cavity 210 of the drum unit 20. A first boss 212 and a second boss 213 protruding to the left along the first direction are provided on a side surface of the first side plate 201 opposite to the second side plate 202 in the first direction; a third boss 214 and a fourth boss 215 protruding to the right along the first direction are provided on a side surface of the second side plate 201 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, and the second boss 213 is aligned with the fourth boss 215 in the third direction; a first supporting surface 2111 and a third supporting surface 2141 are respectively provided on the first boss 212 and the third boss 214, and the first supporting surface 2111 and the third supporting surface 2141 are coplanar with the first direction; a second supporting surface 2131 and a fourth supporting surface 2151 are respectively provided on the second boss 213 and the fourth boss 215, and the second supporting surface 2131 and the fourth supporting surface 2151 are coplanar with the first direction. The first to fourth supporting surfaces are upper surfaces of the first to fourth bosses respectively, and the first to fourth supporting surfaces face the same direction, that is, face the third direction, so that the developing box can be supported by the supporting surfaces when the developing box is installed along the third direction.

[0066] A locking assembly is provided at a position where the first side plate 201 and the second side plate 202 are aligned in the first direction, and the locking assembly includes a locking elastic member (not shown) and a locking member (not shown). The locking elastic member is a torsion spring, and the locking member is pivotally mounted on the first side plate 201 and / or the second side plate 202. A curved surface is provided on the locking member, and the locking member can rotate between a locked position and an unlocked position around a rotation axis parallel to the first direction. One end of the locking elastic member abuts against the first side plate 201 / the second side plate 202, and the other end abuts against the locking member, thereby producing a reset effect on the locking member.

[0067] A drum electrode is also provided on the second side plate 202, and the drum electrode includes a receiving end and a power supply end. The image forming device also includes an installation bin, and the installation bin is used to install the drum unit 1 attached with the developing box 2. A power supply terminal is provided in the installation bin, and the power supply terminal is used to contact and provide electrical energy to the receiving end of the drum electrode on the unit 1, so that the drum electrode on the drum assembly 1 is charged, and the power supply end of the drum electrode is used to supply power to the developing box 2.

[0068] The drum unit 20 is also provided with a pushing member 211, which includes an elastic part and a force-applying part. The elastic part can be compressed to produce elastic deformation, and then the force-applying part is pushed to apply a pushing force to the developing box 10 under the action of the elastic force. The direction of the pushing force is parallel to the second direction, so that the developing roller 15 on the developing box 10 can be closely attached to the photosensitive drum 220. Preferably, in this embodiment, there are two pushing members 211 in each mounting cavity 210, and the two pushing members 211 are respectively arranged on both sides of the partition plate 203 in the first direction. Such an arrangement can make the pushing force be uniformly transmitted to the developing box 10 in the first direction, avoiding the asymmetric pushing force on the developing box 10 caused by the asymmetric arrangement of the pushing members 211, which causes the developing roller 15 and the photosensitive drum 220 to be inconsistently attached in the first direction, thereby affecting the development.

[0069] The drum unit 20 is also provided with a handle, which is located on the partition plate 203 at one end of the drum unit bracket 200 in the second direction, that is, the handle is located on the outer surface of the partition plate 203 in the second direction, and the handle is configured to be held by the user to pull the drum unit 20 out of / push it into the image forming device body.

[0070] Except for the position and structure of the electrical contact assembly 204, the specific structure of the drum unit 20 and its working mode are all prior art. The coordination between the drum unit 20 and the image forming device is also prior art and will not be described in detail here. In this application, only the structure and coordination process of the developing box 10 and the electrical contact assembly 204 are disclosed.

[0071] Embodiment 1

[0072] refer to Figures 3 to 11 A developing box 10 includes a box body 110, a developing assembly, a transmission assembly 120, a separation assembly, an identification assembly 130, a first protective cover 11 and a second protective cover. In this embodiment, when the developing box 10 is installed in the drum unit 20, the direction of the developing box 10 is consistent with the direction of the drum unit 20.

[0073] The box body 110 has a accommodating cavity for accommodating the developer, and the box body 110 has a first side wall a and a second side wall b that are oppositely arranged in a first direction (the length direction of the box body 110), and the box body 110 has a first end c and a second end d that are oppositely arranged in a third direction, and the box body 110 has a first surface e and a second surface f that are oppositely arranged in the second direction; and the first surface e of the box body 110 is provided with a front end cover 12, and the box body 110 is also provided with a powder outlet 13, the powder outlet 13 is connected to the accommodating cavity, and the powder outlet 13 is located at the intersection of the first end c and the first surface e.

[0074] The developing assembly includes a developing roller 15, a powder feeding roller and a stirring frame which are rotatably arranged in the accommodating chamber. The developing roller 15, the powder feeding roller and the stirring frame are rotatably supported by the first side wall a and the second side wall b of the box body 110. The rotation axes of the developing roller 15, the powder feeding roller and the stirring frame all extend along the first direction, that is, the rotation axes of the developing roller 15, the powder feeding roller and the stirring frame are all parallel to the first direction.

[0075] The developing roller 15 is used to develop and form a developer image of a corresponding color on the surface of the photosensitive drum 220. The developing roller 15 is disposed between the side walls at both ends of the box body 110. Preferably, the developing roller 15 is disposed at the second end d of the box body 110, and the developing roller 15 is close to the first surface e and away from the second surface f. Specifically, the developing roller 15 includes a developing roller body and a developing roller shaft that are coaxially arranged. The developing roller body is a hollow cylindrical shape. The developing roller body surrounds the developing roller shaft and covers the developing roller shaft portion. When the developing box 10 is attached to the drum unit 20, the developing roller 15 can be used to contact the photosensitive drum 220 on the image forming device and provide the developer to the photosensitive drum 220.

[0076] The stirring frame is located inside the box body 110, and the axis of the stirring frame extends along the first direction. In the present application, the developer box 10 has a first stirring frame 161 and a second stirring frame 162. In the third direction, the second stirring frame 162 is closer to the developing roller 15 than the first stirring frame 161. The first stirring frame 151 has a first stirring blade 1611, and the second stirring frame 162 has a second stirring blade 1621. In the subsequent description, unless otherwise specified, the first stirring frame 161 and the second stirring frame 162 are uniformly described by the stirring frame. Exemplarily, the stirring frame has a plurality of blades, and the plurality of stirring blades are fixedly mounted on a stirring shaft. The stirring blades move together with the stirring shaft. The stirring frame is used to stir the developer in the accommodating chamber to make the developer frictionally charged and prevent the developer from agglomerating.

[0077] The transmission assembly 120 is arranged 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 gear 1214. The developing gear 1211 is coaxially fixedly mounted on one end of the developing roller shaft close to the second side wall b of the box body 110, the powder feeding gear 1212 is coaxially fixedly mounted on one end of the powder feeding roller shaft close to the second side wall b of the box body 110, and the first stirring gear 1215 is coaxially fixedly mounted on one end of the stirring frame close to the second side wall b of the box body 110.

[0078] Furthermore, the transmission assembly also includes a driving part rotatably supported by the second side wall b of the box body 110, and the driving part includes a coaxially integrally formed power receiving part 121 and a driving gear 1213. In a first direction, the driving gear 1213 is closer to the first side wall a of the box body 110 than the power receiving part 121. The power receiving part 121 and the driving gear 1213 rotate coaxially, and the power receiving part 121 is used to receive torque input from the outside (image forming device). The driving gear 1213 is directly or indirectly engaged with the developing gear 1211, the powder feeding gear 1212, and the first stirring gear 1215 to transmit power to the developing roller 15, the powder feeding roller, and the stirring frame. Preferably, in this embodiment, an idler wheel 1214 is provided between the driving gear 1213 and the first stirring gear 1215, the idler wheel 1214 is rotatably supported by the second side wall b of the box body 110, the rotation axis of the idler wheel 1214 is parallel to the first direction, the idler wheel 1214 is meshed 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 can be provided with a first transmission part, the second stirring frame 162 can be provided with a second transmission part, and the first stirring gear 1215 and the second stirring frame 162 can be transmitted through the first transmission part and the second transmission part; or, multiple idlers or no idlers can be provided to adjust the transmission ratio or the rotation direction. In addition, the gear transmission can also be replaced by belt transmission, friction transmission and the like.

[0079] Here, only the structures of the developing assembly and the transmission assembly 120 are prior arts and are simply disclosed, but are not limited to the above structures.

[0080] The first protective cover 11 is detachably fixedly mounted on the second side wall b of the box body 110, and the second protective cover (not shown) is arranged on the second side wall b of the box body 110. The first protective cover 11 at least covers a portion of the transmission assembly 120 to protect the transmission assembly 120, and when the first protective cover 11 is fixed to the second side wall b of the box body 110, the power receiving part 121 can be exposed at the first end of the box body 110 without being blocked by the first protective cover 11, so that the power receiving part 121 can receive driving force on the image forming device. Specifically, in the present embodiment, a through hole 111 is provided on the first protective cover 11, and when the first protective cover 11 is fixed to the second side wall b of the box body 110 by screws and / or snaps, the power receiving part 121 can extend out of the through hole 111 on the first protective cover 11, and when the developing box 10 is attached to the drum unit 20, the power receiving part 120 is aligned with the through hole 201B on the drum unit 20 in the first direction, and the projection area of ​​the power receiving part 121 in the first direction is smaller than the projection area of ​​the through hole 201B in the first direction, so that when the developing box 10 moves relative to the drum unit 20, the power receiving part 121 is always exposed by the through hole 201B and is connected to the image forming device drive.

[0081] The box body 110 is also provided with a load-bearing portion, which can support the developing box 10 when the developing box 10 is installed in the drum unit 20. Specifically, in the present embodiment, the load-bearing portion is a pair of first protrusions 18 provided on the box body 110, and the first protrusions 18 extend along the first direction at the end of the box body 110 and protrude in the direction away from the box body 110, that is, the pair of first protrusions 18 are respectively provided on the first side wall a and the second side wall b of the box body 110, and the pair of first protrusions 18 protrude outward relative to the first side wall a or the second side wall b; and the pair of first protrusions 18 are symmetrically arranged relative to the box body 110, so that the left and right ends of the developing box 10 can be supported by the load-bearing portion, and can maintain balance, which is conducive to the stable installation of the developing box 10 in the image forming device. Alternatively, in some other embodiments, the two first protrusions 18 may be arranged asymmetrically, or only one first protrusion 18 is arranged.

[0082] The box body 110 further includes a locked portion, which is used to be locked by a locking member on the drum unit 20 when the developing box 10 is installed in the image forming device, so as to prevent the developing box 10 from moving unpredictably in the image forming device. Specifically, in this embodiment, the locked portion is a pair of second protrusions 19 provided at the left and right ends of the box body 110 in the first direction, and the pair of second protrusions 19 are both protrusions extending away from the box body 110 at the end of the box body 110 in the first direction.

[0083] In this embodiment, since the developer cartridge 10 can rotate during the process of being installed on the drum unit 20, the first protrusion 18 and the second protrusion 19 can also be provided with a sleeve that can rotate relative to the first protrusion 18 and the second protrusion 19 to reduce friction. During the process of installing the developer cartridge 10 on the drum unit 20, if the first protrusion 18 and the second protrusion 19 can both rotate, direct contact and friction between the first protrusion 18 and the second protrusion 19 and the drum unit 20 can be avoided, sliding friction can be reduced, friction can be reduced, and wear on the drum unit 20 can be avoided.

[0084] The box body 110 is also provided with a pushing portion 112. When the developing box 10 is installed in the drum unit 20, the pushing portion 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 box 10 can be close to the photosensitive drum 220 of the drum unit 20. Specifically, in the present embodiment, the forced pushing portion 112 includes a first forced pushing member disposed at a position close to the first side wall a at the bottom of the developing box 10 and a second forced pushing member disposed at a position close to the second side wall b at the bottom of the developing box 10. Both the first forced pushing member and the second forced pushing member include a pressure receiving portion 112, that is, a pair of pressure receiving surfaces are disposed on the second surface f of the box body 110. The pressure receiving surfaces are used to directly contact with the forced pushing member 211 in the drum unit 20 to receive the forced pushing force applied by the forced pushing member 211 in the second direction, and drive the developing box 10 to have a tendency to move in the second direction, so that the developing roller 15 is in close contact with the photosensitive drum 220 in the drum unit 20, thereby ensuring the imaging quality of the image forming device. Preferably, the first forced pushing member and the second forced pushing member may be disposed overlappingly in the first direction to ensure that the force degree of the contact position between the developing roller 15 and the photosensitive drum 220 is consistent. Alternatively, in some other embodiments, the first forced pushing member and the second forced pushing member may not be disposed overlappingly, or only one forced pushing member may be disposed.

[0085] The left end of the developing roller shaft is rotatably provided with an electrode protrusion 151, and the right end of the developing roller shaft is rotatably provided with a third protrusion, and the electrode protrusion 151 is aligned with the third protrusion in the first direction. Preferably, the electrode protrusion 151 is made of a conductive material, such as a conductive resin. In other embodiments, the electrode protrusion 151 can also be the left end of the developing roller shaft itself without the need to set up additional parts. When the developing box is attached to the drum unit, the power supply end of the drum electrode contacts the electrode protrusion 151 on the developing box to supply power in the order of the conductive protrusion to the developing roller shaft to the first protective cover 11 to the powder feeding roller shaft, so that the developing roller and the powder feeding roller are charged, so as to facilitate the developing roller and the powder feeding roller to absorb the developer.

[0086] Furthermore, the third protrusion and the electrode protrusion 151 are located further forward than the first protrusion 18 and the second protrusion 19 in the second direction, and the third protrusion and the electrode protrusion 151 are located further downward than the first protrusion 18 and the second protrusion 19 in the third direction, and the first protrusion 18 is located further forward than the second protrusion 19 in the second direction, and the first protrusion 18 is located further downward than the second protrusion 19 in the third direction.

[0087] At least one of the third protrusion, the electrode protrusion 151, the first protrusion 18, and the second protrusion 19 may also be set 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 also be set on the first protective cover 11 or the second protective cover. The third protrusion, the first protrusion 18, the second protrusion 19, and the electrode protrusion 151 move together with the box body 110, or only at least one of the third protrusion, the first protrusion 18, the second protrusion 19, and the electrode protrusion 151 may be set.

[0088] The identification component is arranged on the first side wall a of the box body 110, and the image forming device is used to contact the identification component on the drum unit 20 so that the image forming device can read the information in the storage chip, thereby identifying the information of the developer box 10 (new and old, model, life, etc.). Specifically, in the present embodiment, the identification component includes a chip 131 and a chip frame 132 arranged on the first side wall a of the box body 110. Preferably, the chip 131 stores information about the developer box 10, such as the manufacturing serial number of the developer box 10, the identification code of the developer box 10, the model matched with the developer box 10, the specification of the developer box 10, the capacity of the developer, the service life of the developer roller 15, the number of printed sheets, and the error history, etc. The chip 131 includes a storage chip for contacting with the image forming device to read data and write data thereto, and a plurality of electrical contact surfaces, and the electrical contact surfaces are made of conductive metal, and the chip 131 can transmit the information of the developer box 10 to the image forming device through the electrical contact surfaces. The chip 131 is fixedly mounted on the chip frame 132, and the chip frame 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 to facilitate the assembly of the chip 131. Of course, the chip frame 132 can also be integrally formed with the box body 110. In this case, it can be understood that the chip 131 is fixed on the outer wall surface of the side wall of the box body 110. When the developing box 10 is installed in the image forming device, the electrical contact surface corresponds to the position of the electrical contact component 204 of the drum unit 20, and the electrical contact surface of the chip 131 can contact the electrical contact component 204, and the electrical contact component 204 is connected to the image forming device, so that the developing box 10 is recognized by the image forming device.

[0089] The electrical contact surface on the chip 131 is set as an n-shaped structural groove. When the developer box 10 is installed in the drum unit 20, the electrical contact assembly 204 on the drum unit 20 can move in the n-shaped groove and abut against the groove wall to maintain electrical connection. Specifically, in this embodiment, the electrical contact surface includes a first electrical contact surface 1301 of the chip, a second electrical contact surface 1302 of the chip, a third electrical contact surface 1303 of the chip, a fourth electrical contact surface 1304 of the chip and a guide surface 1305 of the chip. The first electrical contact surface 1301 of the chip is arranged backward in the third direction, the second electrical contact surface 1302 of the chip and the fourth electrical contact surface 1304 of the chip are arranged opposite to each other in the first direction, the first electrical contact surface 1301 of the chip faces the second direction, the third electrical contact surface 1303 of the chip and the guide surface of the chip 131 are arranged in the third direction, and the guide surface 1305 of the chip is arranged below the first electrical contact surface 1301 of the chip. When the developing box 10 is installed on the drum unit 20, the electrical contact surface corresponds to the position of the electrical contact component 204, and the electrical terminal 2042 of the electrical contact component 204 can extend into the electrical contact surface of the "n"-shaped structural groove and contact one of the side surfaces.

[0090] A notch 1306 is also provided on the electrical contact surface, and the electrical terminal 2042 can be accommodated through the notch 1306 when the developer cartridge 10 is matched with the drum unit 20, and the side wall of the notch 1306 can contact the outer peripheral wall of the electrical terminal 2042. Specifically, in this embodiment, the electrical contact surface of the "n"-shaped structural groove is provided with an opening facing away from the third direction, and the opening is the notch 1306. When the developer cartridge 10 is installed 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 then enter the electrical contact surface of the "n"-shaped structural groove, and the outer peripheral wall of the electrical terminal 2042 can contact the side wall of the electrical contact surface of the "n"-shaped structural groove to achieve electrical connection. By setting a notch 1306 on the electrical contact surface, when the electrical contact surface contacts the electrical terminal 2042, the notch 1306 contacts the wall of the electrical terminal. In this way, even if the box body 110 shakes slightly, the side wall of the notch 1306 can always contact the outer peripheral wall of the electrical terminal 2042, which can effectively prevent the poor contact phenomenon when the original terminals are in contact. In addition, the notch 1306 is set, and the electrical terminal 2042 can extend into the notch 1306 to contact the point contact surface, and all the contacts are around the wall, so there will be no deep interference and damage to the point contact surface and the electrical terminal 2042.

[0091] There can be multiple electrical contact surfaces, and the number of electrical terminals 2042 of the electrical contact assembly 204 on the drum unit 20 is consistent with the number of electrical contact surfaces. When the developer box 10 is installed in the drum unit 20, each electrical terminal 2042 also corresponds to an electrical contact surface, so that the electrical contact surface and the electrical contact assembly 204 can be electrically connected. Specifically, in this embodiment, the chip 131 is arranged on the side wall surface along the second direction of the box body 110. It should be noted that the side wall surface along the second direction can refer to the side wall surface of the box body or the side wall surface of the first protective cover 11 or the second protective cover. As long as the chip 131 can be electrically connected to the electrical terminal 2042, this embodiment does not distinguish the components where the chip 131 is located. There are four electrical contact surfaces, which are arranged in an array in the first direction. There are also four electrical terminals 2042 of the electrical contact assembly 204, which are arranged in an array in the first direction, and the four electrical contact surfaces and the four electrical terminals 2042 can be different transmission signals or the same transmission signals.

[0092] Further, the identification component 130 is located on the right side of the box body 110 in the first direction, and is located above the developing roller 15 in the third direction.

[0093] Alternatively, in some other embodiments, the chip 131 may also be detachably mounted on the chip frame 132 .

[0094] As the developing box 10 moves in the opposite direction of the third direction toward the photosensitive drum 220 near the partition plate 203, the electric terminal 2042 first passes through the chip guide surface 1305, and then the free end of the electric terminal 2042 in the second direction protruding direction contacts the first electric contact surface 1301 of the chip, and then the circumferential cylindrical surface of the electric terminal 2042 contacts the second electric contact surface 1302 of the chip, and the fourth electric contact surface 1304 of the chip. As the developing box 10 continues to move in the third direction toward the photosensitive drum 220 near the partition plate 203, the electric terminal 2042 can move relatively within the electric contact surface of the chip 131 of the "n"-shaped structural groove. Finally, the circumferential cylindrical surface of the electric terminal 2042 contacts the third electric contact surface 1303 of the chip along one side of the third direction, thereby ensuring that the electric terminal 2042 is always electrically connected to at least one electric contact surface of the chip 131 during the process of the developing box 10 moving from the first position to the second position. This effectively avoids the problem that the chip 131 of the developing box 10 cannot be recognized by the image forming device due to poor or wrong electrical connection between the chip 131 and the electrical terminal 2042. The electrical contact surface of the chip 131 of the structure of the above embodiment is always electrically connected to the electrical connection terminal provided in the image forming device, which can ensure the stability of the electrical connection between the chip 131 of the developing box 10 and the electrical terminal 2042, so that the developing box can be pushed into the installation cavity, and the box body 110 of the developing box can be moved from the first position to the second position, and the chip 131 can be recognized.

[0095] The separation component 140 is arranged on the box body 110. When the developing box 10 is attached to the drum unit 20, the developing box 10 receives the separation force applied by the separation force output member of the image forming device through the separation component 140, abuts against the drum unit 20 and generates a force in the second direction, thereby separating the developing roller 15 and the photosensitive drum 220.

[0096] The separation assembly 140 includes a separation rod and a first cam and a second cam arranged at both ends of the separation rod. The separation rod is arranged on the box body 110 and can move on the box body 110. The image forming device acts on the second cam of the separation assembly 140 through a separation force output member to make the separation rod move on the box body 110. The first cam of the separation assembly 140 acts on the drum unit 20 to make the developing box 10 rotate on the drum unit 20, so that the developing roller 15 is separated from the photosensitive drum 220.

[0097] Next, a description will be given of a process in which the developing cartridge 10 is installed 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 separate.

[0098] When the developer box 10 is attached to the drum unit, the third protrusion and the electrode protrusion 151 are respectively supported by the first supporting surface 2111 and the third supporting surface 2141 to withstand the gravity of the developer box, and the first protrusion 18 is respectively supported by the second supporting surface 2131 and the fourth supporting surface 2151 to withstand the gravity of the developer box.

[0099] In a state where the developing cartridge 10 is attached to the drum unit 20 and installed in the image forming apparatus, the locking member is limited in rotation angle by the side wall of the installation chamber in the image forming apparatus, so when the developing cartridge 10 moves upward, the locking member prevents the developing cartridge 10 from escaping upward from the drum unit 20. When the developing cartridge 10 is only attached to the drum unit 20 and the drum unit 20 is not installed in the image forming apparatus, the rotation angle of the locking member is not limited, so the user can manually pull the developing cartridge 10 upward from the drum unit 20 to overcome the elastic force of the locking elastic member so that the locking member rotates and detaches from the drum unit 20.

[0100] During the process of installing the developing box 10 to the drum unit 20, the third protrusion, the first protrusion 18, the second protrusion 19 and the electrode protrusion 151 can all rotate, which can avoid direct contact and friction between the third protrusion, the first protrusion 18, the second protrusion 19 and the drum unit, thereby reducing sliding friction, lowering frictional force and avoiding wear on the drum unit.

[0101] At the same time, the force-applying portion contacts the pressure receiving surface, thereby applying a forward thrust to the pressure receiving surface, so that the box body 110 of the developing box as a whole is subjected to a forward thrust, so that the box body 110 drives the developing roller 15 close to the photosensitive drum 220, thereby ensuring that the developing roller is in close contact with the photosensitive drum 220.

[0102] At the same time, since the developing roller 15 needs to rotate during operation, the electrode protrusion 151 and the third protrusion sleeved on the left end of the developing roller shaft can also prevent the rotating developing roller shaft from directly contacting the drum unit and causing wear of the drum unit.

[0103] When the separation force output member of the image forming device (generally a force applying rod) applies a leftward separation force to the separation rod along the first direction, the right end of the separation rod (the second cam) receives the separation force provided by the separation force output member of the image forming device, and the separation force acts on the separation rod from right to left along the first direction. At this time, the separation rod moves from right to left in 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 separation rod drives the first cam and the second cam to move from left to right in the first direction. The first cam and the second cam abut against the drum unit, so that the developing box moves from the first position to the second position relative to the drum unit, and then the drum roller is separated.

[0104] In this process, the contact process between the electrical contact surface on the developing box 10 and the electrical contact assembly 204 is as follows:

[0105] When the developer box 10 is installed in the drum unit 20, as the developer box 10 moves along the third direction toward the photosensitive drum 220 near the lower partition plate 203, the electrical terminal 2042 first passes through the chip guide surface 1305, and then the free end of the electrical terminal 2042 protruding along the second direction contacts the first electrical contact surface 1301 of the chip, and then the circumferential cylindrical surface of the electrical terminal 2042 contacts the second electrical contact surface 1302 of the chip, and the fourth electrical contact surface 1304 of the chip.

[0106] As the developer box 10 continues to move along the third direction toward the photosensitive drum 220 near the partition plate 203, the electrical terminal 2042 can move relatively within the electrical contact surface of the "n"-shaped structural groove, and finally the circumferential cylindrical surface of the electrical terminal 2042 contacts the third electrical contact surface 1303 of the chip along one side of the third direction, as shown in the figure, thereby ensuring that when the developer box 10 moves from the first position to the second position, the electrical terminal 2042 is always electrically connected to at least one electrical contact surface of the chip 131, thereby effectively avoiding poor or erroneous electrical connection between the chip 131 of the developer box 10 and the electrical terminal 2042, resulting in the problem that the chip 131 of the developer box 10 cannot be recognized by the image forming device.

[0107] Thus, the electrical contact surface of the chip 131 of the structure of the above embodiment is always electrically connected to the electrical terminal 2042 provided in the drum unit 20, which can ensure the stability of the electrical connection between the chip 131 of the developer cartridge and the electrical terminal 2042. Thus, when the developer cartridge is pushed into the installation cavity and the box body of the developer cartridge is moved from the first position to the second position, the chip 131 can be identified.

[0108] Embodiment 2

[0109] like Fig.12 , Fig.13 As shown, another developing box 10 is provided in this embodiment. The difference between this embodiment and the first embodiment is that in this embodiment, the structure of the chip 131 is different from that in the first embodiment, and the remaining structure is exactly the same as that in the first embodiment.

[0110] Specifically, refer to Fig.13 The chip 131 includes a substrate 1311, an electrical contact surface and a storage chip. A chip mounting groove for mounting the chip 131 is provided on the chip frame 132. The substrate 1311 of the chip 131 is fixedly mounted in the chip mounting groove. The storage chip and the electrical contact surface are both fixedly mounted on the side of the substrate 1311 facing away from the chip mounting groove, and the storage chip is between the electrical contact surface and the substrate 1311, that is, the electrical contact surface is located at the outermost side in the second direction, and the electrical contact surface is electrically connected to the storage chip. When the developing box is installed on the drum unit and the drum unit is installed in the graphic forming device, the electrical contact surface is used to electrically connect to the image forming device, so as to transmit the information stored in the storage chip to the image forming device.

[0111] Further, the electrical contact surface includes a curved portion 1312, so that when the electrical contact surface abuts against the electrical contact assembly 204 of the image forming device and the curved portion 1312 contacts the electrical terminal 2042, the curved portion 1312 is squeezed and deformed, thereby preventing the rigid contact from damaging the electrical terminal 2042. Specifically, in this embodiment, the electrical contact surface is made of metal, and the electrical contact surface arches backward to form an arch, which includes the curved portion 1312 and an opening, and there is a gap between the curved portion 1312 and the substrate 1311 in the second direction. The cross section of the curved portion 1312 is a roughly D-shaped structure, which can elastically recover in the second direction. The curved portion 1312 extends along the third direction on the electrical contact surface. When the developing box moves from the first position to the second position, the elastic deformation generated by the curved portion 1312 gradually recovers, thereby ensuring that the curved portion 1312 always abuts against the electrical terminal 2042 during the process of moving forward with the developing box, thereby preventing the image forming device from reporting an error due to disconnection of the electrical connection.

[0112] Next, the process of contact and separation between the chip 131 and the electrical contact assembly 204 when the developing cartridge 10 is installed in the drum unit 20 of the image forming apparatus in this embodiment will be described.

[0113] When the developer box 10 is installed in the drum unit 20, as the developer box 10 moves along the third direction toward the photosensitive drum 220 near the lower partition plate 203, the bent portion 1312 of the electrical contact surface abuts against the electrical contact assembly 204 of the drum unit 20. When the bent portion 1312 contacts the electrical terminal 2042, the bent portion 1312 is squeezed and deformed to prevent the rigid contact from damaging the electrical terminal 2042. Because the bent portion 1312 extends in the third direction, as the developer box 10 continues to move along the third direction toward the photosensitive drum 220 near the partition plate 203, the electrical terminal 2042 can always abut against the bent portion 1312, thereby ensuring that the electrical terminal 2042 is always electrically connected to at least one electrical contact surface of the chip 131 during the process of the developer box 10 moving from the first position to the second position.

[0114] When the developer box 10 moves from the first position to the second position, the elastic deformation of the bend 1312 is gradually restored, thereby ensuring that the bend 1312 is always in contact with the electrical terminal 2042 during the process of moving forward with the developer box 10, avoiding disconnection of the electrical connection and causing an error in the image forming device.

[0115] Therefore, the structure in this embodiment can realize that the electrical contact surface of the chip 131 is always electrically connected to the electrical terminal 2042 provided in the drum unit 20, and can ensure the stability of the electrical connection between the chip 131 of the developer cartridge and the electrical terminal 2042. Thus, when the developer cartridge is pushed into the installation cavity and the box body of the developer cartridge is moved from the first position to the second position, the chip 131 can be recognized.

[0116] In this embodiment, the other structures of the developing box 10 are consistent with those in the first embodiment and will not be described here.

[0117] Embodiment 3

[0118] like Fig.14 , Fig.15 As shown, another developing box 10 is provided in this embodiment case. The difference between this embodiment case and embodiment 2 is that: in this embodiment, the structure of the chip 131 is different from that in embodiment 2. In this embodiment, the electrical contact surface of the chip 131 eliminates the bending portion 1312 on the electrical contact surface and is provided with a bending portion, and the rest of the structure is exactly the same as that of embodiment 2.

[0119] The electrical contact surface is a bent portion. When the electrical contact surface abuts against the electrical contact assembly 204 of the image forming device, the bent portion is squeezed and deformed when it contacts the electrical terminal 2042. Specifically, in this embodiment, the electrical contact surface is made of metal, and the bent portion includes a fixed portion 1313 and a tilted portion 1314. The fixed portion 1313 is fixedly mounted on the substrate 1311. The tilted portion 1314 is integrally formed with the fixed portion 1313 and has an angle therebetween. There is a gap between the tilted portion 1314 and the fixed portion 1313 in the second direction, so that the cross section of the electrical contact surface is a roughly V-shaped structure. When the bent portion contacts the electrical terminal 2042, the tilted portion 1314 and the fixed portion 1313 can be elastically deformed and can be close to each other in the second direction, so as to avoid the rigid contact from crushing the electrical terminal 2042.

[0120] Furthermore, the tilted portion 1314 extends in the first direction, and when the developer box 10 is installed in the drum unit 20, the tilted portion 1314 corresponds to the position of the electrical contact assembly 204. The tilted portion 1314 can contact multiple electrical terminals 2042 at the same time, so that the electrical contact surface and the electrical contact assembly 204 are electrically connected.

[0121] Next, the process of driving the chip 131 of the developing cartridge 10 to contact and separate from the electrical contact assembly 204 when the developing cartridge 10 is installed in the drum unit 20 of the image forming apparatus in this embodiment will be described.

[0122] When the developer box 10 is installed in the drum unit 20, as the developer box 10 moves along the third direction toward the photosensitive drum 220 near the partition plate 203, the raised portion 1314 of the electrical contact surface begins to abut against the electrical contact assembly 204 of the drum unit 20. As the developer box 10 continues to move along 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 subjected to forward pressure and produces elastic deformation, thereby avoiding rigid contact from crushing the electrical terminal 2042 and making the raised portion 1314 in close contact with the electrical terminal 2042.

[0123] When the developer box 10 moves from the first position to the second position, the tilted portion 1314 gradually separates from the electrical terminal 2042, and the elastic deformation of the tilted portion 1314 gradually recovers, so that the tilted portion 1314 still maintains contact with the electrical terminal 2042 while moving forward with the developer box 10, avoiding disconnection of the electrical connection and causing an error in the image forming device.

[0124] In this embodiment, the electrical contact surface of the chip 131 of the structure of the above embodiment is always electrically connected to the electrical terminal 2042 provided in the drum unit 20, which can ensure the stability of the electrical connection between the chip 131 of the developer cartridge and the electrical terminal 2042. Thus, when the developer cartridge is pushed into the installation cavity and the box body of the developer cartridge is moved from the first position to the second position, the chip 131 can be recognized.

[0125] In this embodiment, the other structures of the developing box 10 are consistent with those in the second embodiment and will not be described here.

[0126] Embodiment 4

[0127] like Figures 16 to 18 As shown, another developing box 10 is provided in this embodiment. The difference between this embodiment and embodiment one is that: in this embodiment, the developing box 10 is not provided with an electrode protrusion 151 but with a developing electrode 152, and the developing electrode 152 is located at one end outside the first side wall a of the developing roller shaft in the first direction, and the rest of the structure is exactly the same as the developing box structure of embodiment one.

[0128] Specifically, refer to Fig.18 In this embodiment, the developing electrode 152 is composed of a movable part 1521 and a conductive part 1522, and a fixed conductive part 1523. The movable part 1521 can be displaced in the second direction. The fixed conductive part 1523 and the conductive part 1522 are made of conductive material. Preferably, the fixed conductive part 1523 and the conductive part 1522 can be formed of conductive resin, which can easily design the conductive part 1522 and the fixed conductive part 1523 into complex shapes. The fixed conductive part 1523 can be fixedly arranged on the first side wall a, which is connected to the developing roller shaft. The fixed conductive part 1523 is connected to one end of the detachably connected movable part 1521, and the conductive part 1522 is connected to the other end of the detachably connected movable part 1521. The conductive part 1522 can be moved along the elastic axis direction of the movable part 1521 to approach the fixed conductive part 1523 through the movable part 1521. Alternatively, in some other embodiments, metal may be used instead of the conductive resin as the material of the conductive member 1522 and the fixed conductive member 1523 .

[0129] Moreover, the second side plate 202 of the installation cavity 210 of the drum unit 200 is provided with an electrical connection portion 205 separately, rather than the entire second side plate being electrically connected, and the fixed conductive member 1523, the conductive member 1522, and the movable member 1521 are all made of conductive materials, so the developing electrode 152 can always be electrically connected to the drum unit 200 from the time when the conductive member 1522 contacts the separately provided electrical connection portion 205 to the time when the developing cartridge 10 is removed from the installation cavity 210. When the developing cartridge 10 is installed in the installation cavity 210, the developing electrode 152 is electrically connected to the second side plate of the drum unit 200, and the developing electrode 152 forms an electrical connection relationship between the drum unit 200 and the developing roller 15. The developing electrode 152 is an electrode for applying a developing bias voltage to the developing roller 15, from Fig.19 It can be seen from the figure that even during the whole process of installing the developing box 10 into the installation cavity 210, due to the interaction between the movable part 1521 and the conductive part 1522, as well as the fixed conductive part 1523, the conductive part 1522 can be moved in the second direction together with the movable part 1521, thereby enabling the conductive part 1522 to always be electrically connected to the second side plate of the drum unit 200.

[0130] Therefore, the developing electrode 152 provided in this embodiment can ensure the stability of the connection between the developing roller 15 of the developing box 10 and the electrical connection portion 205. Thus, when the developing box 10 is pushed into the mounting cavity 210 and the box body 110 of the developing box moves from the first position to the second position, the developing roller 15 can remain energized.

[0131] In this embodiment, the other structures of the developing box 10 are consistent with those in the first embodiment and will not be described here.

[0132] Embodiment 5

[0133] like Fig.19 , Fig. 20 As shown, another developing box 10 is provided in this embodiment. The difference between this embodiment and the first embodiment is that: in this embodiment, a avoidance groove 124 is provided on the developing box 10, and the rest of the structure is exactly the same as that of the first embodiment.

[0134] Specifically, the avoidance groove 124 is arranged at the first end c of the developer box 10, and the avoidance groove 124 is recessed along the third direction on the first end c of the developer box 10, and it is a roughly square structure on the first end c of the developer box 10, and the avoidance groove 124 also penetrates the first end c of the developer box 10 in the second direction, so that the pressure-applying portion 3 of the image forming device does not interfere with the developer box 10 in the opposite direction of the third direction, and the pressure-applying portion 3 is not interfered with by the developer box 10 during the installation of the drum unit 20 and the developer box 10 along the third direction, and is not interfered with when moving above the developer box 10 along the second direction.

[0135] Furthermore, two avoidance grooves 124 are arranged at the first end c of the developing box 10 and are spaced apart from each other in the first direction. The two avoidance grooves 124 are respectively close to the first side wall a and the second side wall b of the box body 110, and correspond to the positions of two pressure-applying parts 3 provided in the image forming device, and can avoid the pressure-applying part 3 of the image forming device.

[0136] Next, the cooperation process between the avoidance groove 124 and the pressure applying portion 3 when the developing cartridge 10 and the drum unit 20 are installed in the image forming apparatus in this embodiment will be described.

[0137] When the developing box 10 is located at the third position relative to the mounting cavity 210, the developing roller 15 is not in contact with the photosensitive drum 220 at this position, and the drum unit bracket 200 is installed on the image forming device when the developing box 10 is located at the third position. The pressure-applying portion 3 of the image forming device is arranged above the mounting cavity 210, that is, the developing box 10 is completely installed in the mounting cavity 210 of the drum unit 200. When the drum unit bracket 200 is installed on the image forming device, the pressure-applying portion 3 is located above the first end c of the developing box 10 in the third direction, and according to the operation or movement of the drum unit bracket 200, the pressure-applying portion 3 partially overlaps with the developing box 10 in the third direction, but because The developing box 10 is provided with an avoidance groove 124 corresponding to the position of the pressure-applying portion 3. The pressure-applying portion 3 on the image forming device enters the avoidance groove 124 in the third direction, and the pressure-applying portion 3 cannot contact the developing box 10. When the developing box 10 moves in the opposite direction of the second direction along with the mounting cavity 210 of the drum unit 200, the pressure-applying portion 3115 of the image forming device just passes through the avoidance groove 124 of the developing box 10. In this way, the two parts of the developing box 10 spaced apart from each other in the first direction avoid the pressure-applying portion 3 of the image forming device, thereby avoiding interference. At the same time, it is ensured that the developing box 10 can completely fall into the internal mounting cavity 210 of the drum unit bracket 200.

[0138] When the developing roller 15 needs to contact the photosensitive drum 220, it is only necessary to manually press the developing box 10 downward along the third direction to achieve the contact. The box body of the developing box 10 moves from the third position to the fourth position. At the fourth position, the developing roller 15 contacts the photosensitive drum 220. Alternatively, in some embodiments, the developing box 10 moves downward along the third direction toward the photosensitive drum 220 under the action of gravity to achieve the contact state between the developing roller 15 and the photosensitive drum 220.

[0139] Furthermore, since the positions of the pressure-applying portion 3 in different types of image forming devices are also different, in other embodiments, the avoidance groove 124 of the developing box 10 can be set at both ends of the developing box 10, that is, the avoidance groove on the developing box 10 can be determined according to the position of the pressure-applying portion 3 of the image forming device, and no specific limitation is made here.

[0140] The design of the avoidance groove 124 in this embodiment is simple in structure, and fully realizes that the developing box 10 has already fallen into the installation cavity of the drum unit bracket 200 outside the image forming device. It can avoid the interference between the developing box 10 and the drum unit bracket 200 moving together and the pressure applying part 3 of the image forming device, resulting in the impact of the third direction on the photosensitive drum 220, thereby affecting the development and printing of the photosensitive drum 220. In this embodiment, the other structures of the developing box 10 are consistent with those in the first embodiment, and will not be described here.

[0141] Embodiment 6

[0142] like Fig.21 , Fig. 22 As shown, another developing box 10 is provided in this embodiment. The difference between this embodiment and the first embodiment is that the first stirring frame 161 drives the second stirring frame 162 by the first stirring blade 1611, and does not have the first transmission part and the second transmission part.

[0143] 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 to 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 the rotation trajectory W of the first stirring blade 1611, that is, the second stirring blade 1621 and the projection of the rotation trajectory W of the first stirring blade 1611 in the first direction at least partially overlap, when the first stirring frame 161 rotates, since the second stirring blade 1621 is located on the rotation trajectory W of the first stirring blade 1611, the first stirring blade touches the second stirring blade during rotation, and the interference between the first stirring blade 1611 and the second stirring blade 1621 drives the second stirring frame 162 to rotate. The number of the second stirring blades is preferably three, the angle between adjacent second stirring blades is set to 120°, and the second stirring blades are evenly distributed. Optionally, the number of the second stirring blades can also be set to other numbers but at least one.

[0144] Furthermore, the rotation axis of the second stirring frame 162 is arranged at a position closer to the powder 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 second stirring blade can stir the developer accumulated near the powder feeding roller when rotating.

[0145] In this embodiment, the stirring structure is set as a first stirring member and a second stirring frame 162. Through the rotation of the second stirring frame 162, the developer in the area that cannot be fully stirred by the rotation of the first stirring member alone can be stirred. When the remaining amount of developer inside the developing box 10 is low, the developer can also be stirred and the development work can be guaranteed.

[0146] In this embodiment, the other structures of the developing box 10 are consistent with those in the first embodiment and will not be described here.

[0147] Embodiment 7

[0148] like Figure 23 to Figure 26 As shown, another developing box 10 is provided in this embodiment, and the difference between this embodiment and embodiment six is ​​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 projections of the movement trajectories of the second stirring blade 1621 and the first stirring blade 1611 in the first direction do not overlap.

[0149] Specifically, one end of the second stirring frame 162 has a hollow accommodating portion 1624, a first groove 16241 is further provided on the circumferential wall constituting the hollow accommodating portion 1624, an annular accommodating portion 16243 is further provided on the radial periphery of the hollow accommodating portion 1624, and a second groove 16242 is further provided on the outer circumferential wall constituting the annular accommodating portion 16243. Preferably, the number of the first groove is at least one, which can be determined according to the number of power transmission rods 16224 described later. The second stirring tooth 1622 is provided with a columnar joint portion 16223 on a side close to the second side wall b in the first direction, and a power transmission rod 16224 extending radially outward along the axis of the second stirring tooth 1622 is further provided on the columnar joint portion 16223. The second stirring tooth 1622 is further provided with a second driving protrusion 16221 on a side away from the second side wall b in the first direction, and a third groove 16222 is further provided on the second stirring tooth 1622. 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 installed in the annular accommodating portion 16243, and the first abutting portion 16231 is installed in the second groove 16242. The columnar engaging portion 16223 of the second stirring tooth 1622 is installed in the hollow accommodating portion 1624 along the first direction, and the power transmission rod 16224 is engaged with the first groove 16241, so that the second stirring tooth 1622 and the second stirring frame 162 are relatively fixedly arranged, that is, the second stirring tooth 1622 and the second stirring frame 162 will not rotate relative to each other, so that the second stirring tooth 1622 can transmit the driving force to the second stirring frame 162. At this time, the second abutting portion 16232 of the elastic member 1623 is just placed in the third groove 16222 of the second stirring tooth 1622.

[0150] The transmission assembly 120 further includes a first transmission member 126 and a second transmission member 127. The first transmission member 126 and the second transmission member 127 are also arranged outside the first side wall a together with the developing gear 1211, the powder feeding gear 1212, and the first stirring gear 1215. The first transmission member 126 is formed as a gear meshing with the small-diameter gear portion, and the second transmission member 127 is formed as a gear meshing with the second transmission member. At the same time, a first driving protrusion 1271 is also arranged at one end of the second transmission member 127 away from the first side wall a, and the first driving protrusion 1271 protrudes radially outward along the axis of the second transmission member 127.

[0151] When the driving part receives the driving force from the image forming device and the axis rotates, the developing gear 1211, the powder feeding gear 1212 and the first stirring gear 1215 meshed with the driving part rotate, and the first transmission member 126 and the second transmission member 127 are driven to rotate by the rotation of the first stirring gear 1215. Through the rotation of the second transmission member 127, the first driving protrusion 1271 transmits power to the second driving protrusion 16221, thereby driving the second stirring tooth 1622 to rotate, and the second stirring tooth 1622 transmits power to the second stirring frame 162 through the power transmission rod 16224.

[0152] During the rotation of the second stirring frame 162, the elastic member 1623 is deformed in the rotation direction. After the second transmission member 127 drives the second stirring tooth 1622 to rotate a certain angle, the first driving protrusion 1271 separates from the second driving protrusion 16221. The second stirring frame 162 drives the second stirring frame 162 and the second stirring tooth 1622 to rotate in the direction opposite to the aforementioned rotation direction under the restoring force of the elastic member 1623. Therefore, the second stirring frame 162 reciprocates under the driving force provided by the driving part and the restoring force of the elastic member 1623.

[0153] Alternatively, 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, and a second stirring tooth 1622 is coaxially fixedly installed on the right end of the second stirring frame 162. No elastic member 1623 is arranged between the second stirring tooth 1622 and the second stirring frame 162. Both the second stirring tooth 1622 and the second transmission member 127 are provided with protrusions that interfere with each other. When the first stirring tooth 1215 rotates, the first transmission part 126 drives the second transmission part 127 to rotate, and the protrusion on the second transmission part 127 interferes with the protrusion on the second stirring tooth 1622, thereby pushing the second stirring tooth 1622 to rotate, and the second stirring frame 162 rotates.

[0154] Alternatively, in some other embodiments, the second transmission member 127 may be omitted, 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 .

[0155] Alternatively, refer to Fig.26 In some other embodiments, the first stirring tooth 1215 may include a large diameter portion and a small diameter portion, the small diameter portion is closer to the first side wall 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 with a columnar surface having a certain degree of roughness. The second stirring tooth 1622 is disposed at one end of the second stirring frame 162 in the first direction close to the first side wall a, and the second stirring tooth 1622 is formed as a cylindrical shape with a columnar surface having a certain degree of roughness, the diameter of the second stirring tooth 1622 is smaller than the small diameter portion of the first stirring gear 125, the first transmission member 126 is an annular conveyor belt, and the two ends of the first transmission member 126 in the second direction are respectively sleeved on the small diameter portion of the first stirring tooth 1215 and the second stirring tooth 1622, that is, the first stirring tooth 1215 transmits the driving force to the second stirring tooth 1622 through the first transmission member 126, so that the second stirring tooth 1622 drives the second stirring frame 162 to rotate together.

[0156] 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 box 10 to a certain extent, and further simplify the parameter design of the transmission structure.

[0157] Furthermore, by directly connecting the first stirring tooth 1215 with the second stirring tooth 1622 through a belt, the first and second transmission members can be eliminated. In this embodiment, the first transmission member 126 can be changed from a tooth shape to a belt to connect the first stirring tooth 1215 with the second stirring tooth 1622, and the second transmission member 127 can be eliminated.

[0158] In this embodiment, the other structures of the developer box 10 are consistent with those in the sixth embodiment and will not be described here.

[0159] The developer box of the utility model has an electrical contact surface arranged as an n-shaped structural groove or an arched portion or a bent portion arranged on the electrical contact surface, so as to achieve the situation that when the chip frame is kept stationary, when the developer box is installed on the drum unit, it can contact the electrical terminal on the drum unit when it is in the first position and the second position, and will not make hard contact with the electrical terminal, which can effectively prevent the failure of information recognition caused by the damage of the electrical terminal due to hard contact; the stirring frame comprises a first stirring frame and a second stirring frame, the idle wheel is directly connected to the first stirring tooth to drive the first stirring frame, the first stirring tooth is connected to the transmission gear to drive the second stirring frame, or the first stirring tooth is directly connected to the second stirring frame through a belt, or the second stirring blade is directly driven by the first stirring blade, and then the second stirring frame is driven, thereby reducing the intermediate transmission gear when driving the second stirring frame, and simplifying the structure and reducing the cost while achieving the same driving effect.

[0160] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A developing cartridge, detachably mounted in an image forming device, the image forming device comprising a drum unit and an electrical terminal, characterized in that: The developing box comprises: A box body, the box body having a receiving cavity for storing a developer, the box body having a first side wall and a second side wall 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, wherein in a third direction, the developing roller is closer to the first end than to the second end; A power receiving portion, disposed on the second side wall of the box body, for receiving a driving force from the image forming device; The chip is arranged on a chip frame, the chip frame is arranged on the first side wall of the box body, the chip comprises an electrical contact surface, and the electrical contact surface can be electrically connected to the image forming device through the electrical terminal.

2. A developing cartridge according to claim 1, characterized in that: An "n"-shaped groove is arranged on the chip, the electrical contact surface is arranged in the "n"-shaped groove, and the opening of the "n"-shaped groove faces the developing roller in the third direction.

3. A developing box according to claim 2, characterized in that: When the developing box is matched with the image forming device, the electrical terminal extends into the "n"-shaped groove, and the electrical contact surface abuts against the side wall of the electrical terminal to complete the electrical connection between the electrical contact surface and the image forming device.

4. A developing cartridge according to claim 1, characterized in that: The electrical contact surface on the chip can move relative to the box body in a second direction. The chip also includes a substrate and a storage crystal. The electrical contact surface is arranged on the substrate and is electrically connected to the storage crystal.

5. A developing cartridge according to claim 4, characterized in that: The electrical contact surface is a bent portion, which includes a fixed portion connected to the substrate and a raised portion forming an angle with the fixed portion, the raised portion can abut against the electrical terminal, and the raised portion can move back and forth relative to the box body in the second direction.

6. A developing cartridge according to claim 4, characterized in that: The electrical contact surface is in an arch shape, and the arch includes an opening and a curved portion. The opening faces the substrate in the second direction, and the curved portion can move back and forth relative to the box body in the second direction.

7. A developing cartridge according to claim 1, characterized in that: The developer is also provided with a stirring frame, which includes a first stirring frame and a second stirring frame. In the third direction, the second stirring frame is located between the first stirring frame and the developing roller. The first stirring frame is provided with a first stirring tooth, and the first stirring tooth can receive the driving force transmitted by the power receiving part to drive the first stirring frame to rotate.

8. A developing cartridge according to claim 7, characterized in that: The first stirring frame has a first stirring blade, and the second stirring frame has a second stirring blade. The projection of the rotation trajectory of the first stirring blade in the first direction partially interferes with the projection of the rotation trajectory of the second stirring blade in the first direction. When the first stirring frame rotates, the first stirring blade can move the second stirring blade, thereby driving the second stirring frame to rotate.

9. A developing cartridge according to claim 7, characterized in that: The second stirring frame is provided with second stirring teeth, and the first stirring teeth are connected to the second stirring teeth via a belt. When the first stirring teeth rotate, the second stirring teeth can be driven to rotate via the belt, thereby driving the second stirring frame to rotate.

10. A developing cartridge according to claim 9, characterized in that: A first transmission member and a second transmission member are also arranged between the first stirring tooth and the second stirring tooth. The second transmission member is provided with a first driving protrusion, and the second stirring tooth is provided with a second driving protrusion. The rotation trajectories of the first driving protrusion and the second driving protrusion interfere with each other. The rotation of the first stirring tooth drives the first transmission member and the second transmission member to rotate. The second transmission member drives the second stirring tooth to rotate by moving the second driving protrusion through the first driving protrusion, thereby driving the second stirring frame to rotate.

11. A developing cartridge according to claim 10, characterized in that: The second stirring frame is also provided with an elastic member between the second stirring tooth and the box body. The elastic member can be compressed when the second stirring tooth cooperates with the second transmission member to rotate the second stirring frame. After the second stirring tooth cooperates with the second transmission member, the elastic member is released, so that the second stirring frame rotates in a direction opposite to the direction in which the elastic member is compressed.

12. A developing cartridge according to claim 1, characterized in that: The developing box is symmetrically provided with avoidance grooves in a first direction, and the avoidance grooves extend along a third direction. When the developing box is installed on the image forming device together with the drum unit, the pressure-applying portion on the image forming device can cooperate with the avoidance grooves, so that the developing box does not receive the force of the pressure-applying portion.

13. A developing cartridge according to claim 1, characterized in that: The developing box further comprises a developing electrode, the developing electrode comprises a movable part and a conductive part, the conductive part is connected to the developing box via the movable part, the movable part can be displaced in a second direction, and the conductive part can be electrically connected to the drum unit.

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