Developing box

Abstract

A developing cartridge for being detachably mounted to an image forming apparatus includes: a cartridge body for accommodating a developer, the cartridge body having a first end and a second end in a first direction; the developing roller is rotatably arranged on the box body around an axis extending along a first direction; the developing roller comprises a roller shaft and a roller main body rotating along with the roller shaft; the storage medium comprises an electric contact surface arranged at the first end; the electrode is arranged at the second end and is electrically connected with the roller main body; and a powder feeding member for feeding the developer to the roller body, the powder feeding member not rotating around an axis extending in the first direction or not electrically connected to the roller body. The powder feeding piece does not rotate around the axis extending in the first direction, or the powder feeding piece is not electrically connected with the roller main body, so that the powder feeding piece is simpler to arrange, and the production cost of the developing box is reduced.

Description

Technical Field

[0001] The present invention relates to the field of electro-imaging technology, and particularly to a developing cartridge. Background Art

[0002] The developing cartridge is detachably mounted on an image forming apparatus together with a drum unit to provide a developer for the image forming apparatus, so that a sheet such as paper output from the image forming apparatus can be imaged. The developing cartridge includes a cartridge body, a developing roller, a powder feeding roller, and an electrode. The developing roller and the powder feeding roller are disposed in the cartridge body and extend along a first direction. The powder feeding roller receives the power of the image forming apparatus transmitted by the electrode to charge the developer on the surface of the powder feeding roller. The powder feeding roller contacts the developing roller to transfer the developer to the developing roller. Both ends of the developing roller in the first direction are rotatably supported at both ends of the cartridge body in the first direction. Both ends of the powder feeding roller in the first direction are rotatably supported at both ends of the cartridge body in the first direction. The powder feeding roller receives the rotational driving force from the image forming apparatus and rotates around the rotation axis in the first direction. Structures such as bearing sleeves need to be provided at the position where the powder feeding roller rotates in cooperation with the cartridge body, resulting in a complex setting method for providing the developer for the developing roller and high cost. Summary of the Invention

[0003] According to one aspect of the present invention, there is provided a developing cartridge for detachably mounting on an image forming apparatus, including:

[0004] A cartridge body for accommodating a developer, having a first end and a second end in a first direction;

[0005] A developing roller rotatably disposed on the cartridge body around an axis extending along the first direction; the developing roller includes a roller shaft and a roller body rotating with the roller shaft;

[0006] A storage medium including an electrical contact surface provided at the first end;

[0007] An electrode provided at the second end and electrically connected to the roller body; and

[0008] A powder feeding member for feeding the developer to the roller body, the powder feeding member not rotating around an axis extending along the first direction or the powder feeding member not being electrically connected to the roller body.

[0009] In the present invention, the powder feeding member does not rotate around an axis extending along the first direction, or the powder feeding member is not electrically connected to the roller body, so that the setting of the powder feeding member is simpler and the production cost of the developing cartridge is reduced.

[0010] In some embodiments, the powder feeding member does not rotate around an axis extending along the first direction, and the powder feeding member is fixedly disposed on the cartridge body.

[0011] In some embodiments, the powder feeding member is configured to contact the roller body and to feed the developer to the roller body by friction with the roller body.

[0012] In some embodiments, the box body includes a partition portion, the partition portion divides the space inside the box body into a toner hopper and a developer hopper that communicate with each other, and the developer roller is disposed in the developer hopper;

[0013] The partition portion includes a first wall formed in the developing chamber and a second wall formed in the toner chamber, and the powder feeding member is fixedly arranged on the first wall.

[0014] In some embodiments, the angle between the first wall and the second wall is 40° to 120°.

[0015] In some embodiments, the powder feeding member is made of soft material.

[0016] In some embodiments, the powder feeding member is made of sponge or rubber.

[0017] In some embodiments, the powder feeding member does not contact the roller body.

[0018] In some embodiments, the powder feeding member is made of a hard material and is provided with a plurality of through holes, through which the developer can be transported to the roller body.

[0019] In some embodiments, the powder feeding member is made of metal or resin.

[0020] In some embodiments, the powder feeding member does not rotate around an axis extending along the first direction, and the powder feeding member includes a rotating member rotating around an axis intersecting the first direction, and a circumferential surface of the rotating member contacts the roller body to feed developer thereto.

[0021] In some embodiments, there are a plurality of rotating members arranged along the first direction, the rotation axes of the plurality of rotating members are parallel and adjacent rotating members are in contact with each other;

[0022] The developing box also includes a power receiving part and a plurality of bevel gears transmission-connected to the power receiving part. The plurality of rotating parts are connected by a chain or a belt. The power receiving part transmits the driving force to the rotating parts through the plurality of bevel gears, thereby driving the plurality of rotating parts to rotate together.

[0023] In some embodiments, the powder feeding member is made of conductive material.

[0024] In some embodiments, the powder feeding member is not electrically connected to the roller body, and the powder feeding member rotates around an axis extending along the first direction and contacts the roller body.

[0025] In some embodiments, the roller does not receive electrical energy.

[0026] In some embodiments, the developing cartridge includes a doctor blade for adjusting the thickness of the developer layer on the roller body, and the electrode is electrically connected to the roller body through the doctor blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural view of the developing cartridge in Embodiment 1 of the present invention;

[0028] Figure 2 is a schematic structural view of the developing cartridge from another perspective in Embodiment 1 of the present invention;

[0029] Figure 3 is an exploded view of the developing cartridge in Embodiment 1 of the present invention;

[0030] Figure 4 is a schematic structural view of the developing component in contact with the electrode in Embodiment 1 of the present invention;

[0031] Figure 5 is a schematic structural view of the developing component in contact with the electrode in Embodiment 2 of the present invention;

[0032] Figure 6 is a schematic structural view of the powder feeding member in contact with the developing roller in Embodiment 3 of the present invention;

[0033] Figure 7 is a schematic structural view of the powder feeding member in contact with the developing roller in a variant of Embodiment 3 of the present invention;

[0034] Figure 8 is a perspective view of the first end of the drum assembly in Embodiment 4 of the present invention;

[0035] Figure 9 is a perspective view of the second end of the drum assembly in Embodiment 4 of the present invention;

[0036] Figure 10 is a perspective view of the developing cartridge from a first perspective in Embodiment 4 of the present invention;

[0037] Figure 11 is a perspective view of the developing cartridge from another perspective in Embodiment 4 of the present invention

[0038] Figure 12 is an exploded view of the first end of the developing cartridge in Embodiment 4 of the present invention;

[0039] Figure 13 is a perspective structural view of the powder feeding member in Embodiment 4 of the present invention;

[0040] Figure 14 It is a three-dimensional schematic diagram of the first end where the powder feeding member and the cartridge body cooperate in the fourth embodiment of the present invention;

[0041] Figure 15 It is an exploded schematic diagram of the second end of the developing cartridge in the fourth embodiment of the present invention;

[0042] Figure 16 It is a three-dimensional schematic diagram of the second end of the developing cartridge hiding the second protective cover in the fourth embodiment of the present invention;

[0043] Figure 17 It is a schematic diagram of the first end where the photosensitive drum and the developing roller cooperate in the fourth embodiment of the present invention;

[0044] Figure 18 It is a schematic diagram of the second end where the photosensitive drum and the developing roller cooperate in the fourth embodiment of the present invention;

[0045] Figure 19 It is a structural schematic diagram of the developing cartridge provided in the fifth embodiment of the present invention;

[0046] Figure 20 It is a partial exploded structural schematic diagram of the developing cartridge provided in the fifth embodiment of the present invention when viewed from the front to the back;

[0047] Figure 21 It is a structural schematic diagram of the second end perspective of the developing cartridge provided in the fifth embodiment of the present invention;

[0048] Figure 22 It is a cross-sectional structural schematic diagram of the developing cartridge provided in the fifth embodiment of the present invention with a powder feeding member;

[0049] Figure 23 It is a cross-sectional structural schematic diagram of the developing cartridge provided in the fifth embodiment of the present invention with a moving member;

[0050] Figure 24 It is a cross-sectional structural schematic diagram of the developing cartridge provided in the sixth embodiment of the present invention. Detailed implementation manners

[0051] The present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0052] It should be noted that the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0053] In the present invention, unless otherwise clearly stipulated and defined, terms such as "installed", "connected", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the present invention, unless otherwise clearly stipulated and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0055] In the above description, the description referring to terms such as "an embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0056] Embodiment 1:

[0057] Such as Figure 1 、 Figure 2As shown, the developing cartridge 1 is detachably mounted on the drum assembly of the image forming apparatus. A photosensitive drum is provided on the drum assembly, and a detecting member for detecting the developing cartridge 1 is provided in the image forming apparatus. After being triggered by the developing cartridge 1, the detecting member moves, enabling the image forming apparatus to identify the developing cartridge 1.

[0058] The developing cartridge 1 includes a cartridge body 10, a transmission assembly, a first cover 111, and an electrode 123.

[0059] As Figure 1 and Figure 2 As shown, the cartridge body 10 has a first end 11 and a second end 12 oppositely arranged in a first direction; a third end 13 and a fourth end 14 oppositely arranged in a second direction; and a fifth end 15 and a sixth end 16 oppositely arranged in a third direction. A handle 141 is provided at the fourth end 14 of the cartridge body 10, and a user can pick up the developing cartridge 1 by holding the handle 141. The first cover 111 is detachably and fixedly mounted at the first end 11 of the cartridge body 10. The first cover 111 at least covers a part of the transmission assembly, and the first cover 111 is used to protect the transmission assembly. A second cover 121 is detachably mounted at the second end 12 of the cartridge body 10.

[0060] The first end of the developing cartridge 1 has a first cover 111, and the first cover 111 includes a first guiding member 1111 and a first pressing portion 1112. The first guiding member 1111 is a cylindrical protrusion protruding outward in the first direction. The first guiding member 1111 is used to guide the developing cartridge 1 to be smoothly mounted on the drum assembly during the process of mounting the developing cartridge 1 to the drum assembly. In the first direction, the first guiding member 1111 is closer to the third end 13 than the fourth end 14. The first pressing portion 1112 is located at the rear end of the first cover 111. The first pressing portion 1112 protrudes in a direction away from the developing roller 131. The first pressing portion 1112 can be a U-shaped, C-shaped, or V-shaped protrusion. The first pressing portion 1112 is used to receive the pressing force exerted by the drum assembly on the developing cartridge 1, so that the developing roller 131 is in close contact with the photosensitive drum.

[0061] The second cover 121 includes a second pressing portion 1212. The second pressing portion 1212 is located at the rear end of the second cover 121. The second pressing portion 1212 protrudes in a direction away from the developing roller 131. The second pressing portion 1112 can be a U-shaped, C-shaped, or V-shaped protrusion. The first pressing portion 1112 is used to receive the pressing force exerted by the drum assembly on the developing cartridge 1, so that the developing roller 131 is in close contact with the photosensitive drum. In the first direction, the first pressing portion 1112 and the second pressing portion 1212 are symmetrically arranged.

[0062] The second end 12 further includes a second bearing 122, and a second guiding portion 1221 is provided on the second bearing 122. In the first direction, the second guiding portion 1221 is symmetrically arranged with the first guiding portion 1111. The second guiding member 1221 is a cylindrical protrusion protruding outward in the first direction, and the second guiding member 1221 is used to guide the developing cartridge 1 to be smoothly installed on the drum assembly during the process of installing the developing cartridge 1 onto the drum assembly.

[0063] The developing cartridge 1 includes a bracket 17 and a storage medium 18. The storage medium 18 is detachably installed on the bracket 17. A buckle is provided on the bracket 17, and the bracket 17 is detachably installed on the first cover 111 or the cartridge body 10 through the buckle. The storage medium 18 is used to store relevant information of the developing cartridge 1, and has an electrical contact surface 181 thereon, and transmits the relevant information of the developing cartridge 1 to the image forming apparatus through the electrical contact surface 181. Specifically, the electrical contact surface 181 electrically connected to the storage medium 18 is in direct contact with the image forming apparatus to transmit the information in the storage medium 17 to the image forming apparatus.

[0064] Figure 3 , Figure 4 As shown, a developing roller 131 and a powder feeding member 133 are provided on the developing cartridge 1, both extending in the first direction. The developing roller 131 and the powder feeding member 133 are both supported by the cartridge body 10 and can rotate relative to the cartridge body 10, and the rotation axes both extend in the first direction. In this embodiment, the powder feeding member 133 is specifically implemented as a powder feeding roller. The powder feeding member 133 transfers the developer to the developing roller 131. The powder feeding member 133 is not electrically connected to the developing roller 131, and the main body of the powder feeding member 133 can be made of an insulating material. The developing roller 131 contacts the photosensitive drum 24, and the developing roller 131 transfers the developer to the photosensitive drum 24.

[0065] The developing roller 131 includes a roller main body 1311 and a roller shaft 1312. The roller main body 1311 at least covers a part of the roller shaft 1312. The roller main body 1311 rotates following the roller shaft 1312. The roller main body 1311 is preferably supported by a conductive rubber material. The roller shaft 1312 is preferably a steel shaft to ensure the strength of the roller shaft 1312. In other embodiments, it can also be other shafts such as a plastic shaft. The roller main body 1311 is not electrically connected to the roller shaft 1312. An insulating layer can be provided between the two to insulate them from each other, or a shaft directly made of an insulating material can be used. The roller main body 1311 is used to adsorb the developer and transfer the developer to the photosensitive drum 24.

[0066] The developing cartridge 1 further includes a doctor blade 132 which is used to contact with the developing roller 131 and control the thickness of the developer layer on the developing roller 131. The doctor blade 132 includes a blade holder 1321 and a blade 1322. The blade holder 1321 supports the blade 1322, and the blade 1322 is installed on the blade holder 1321 by means of welding or pasting, etc. In this embodiment, the preferred way is welding. The blade holder 1321 extends in the first direction and bends in the third direction. The blade holder 1321 is provided with a first mounting hole 13211 which is a through hole in the second direction of the blade holder 1321. Preferably, two first mounting holes 13211 are provided, which are respectively located at one end and the other end of the blade holder 1321 close to the second end 12 in the first direction. The blade 1322 contacts with the roller body 1311 of the developing roller 131, and the blade 1322 can limit the thickness of the developer layer on the roller body 1311 to ensure the uniformity of the developer transferred by the developing roller 131. The doctor blade 132 is at least partially made of a conductive material. In this embodiment, the doctor blade 132 is entirely made of a conductive material, preferably a steel blade, which has good conductivity and high cost performance.

[0067] The developing roller 131, the powder feeding member and the doctor blade 132 are the developing components in this embodiment.

[0068] As Figure 4 shown, an electrode 123 is further provided at the second end 12 of the cartridge body 10. The electrode 123 is supported by the second bearing 122 and is used to contact with a power supply terminal in the image forming apparatus to receive the electric energy output by the image forming apparatus. After receiving the electric energy output by the image forming apparatus, the electrode 123 transmits the electric energy to the developing roller 131 so that the developing roller 131 is charged to adsorb the developer.

[0069] The second bearing 122 is used to support the developing roller 131, the powder feeding member 133 and the electrode 123. The second bearing 122 is further provided with a support hole 1222 which is a through hole in the first direction. The first electrical contact portion 1231 is supported by the support hole 1222 and is exposed through the support hole 1222 to contact with the power supply terminal on the image forming apparatus.

[0070] The electrode 123 includes a first electrical contact portion 1231, a second electrical contact portion 1232, and a connecting portion 1233. The connecting portion 1233 is used to connect the first electrical contact portion 1231 and the second electrical contact portion 1232. The connecting portion 1233 is bent, and at least a part of it overlaps with the second end 12 of the cartridge 10. The connecting portion 1233 is supported by the second end 12 to ensure the stable installation of the electrode 123. The first electrical contact portion 1231 is used to directly contact a power supply terminal in the image forming apparatus to receive electric energy. The second electrical contact portion 1232 contacts the doctor blade 132 to transfer the electric energy to the doctor blade 132. The doctor blade 132 transfers the electric energy to the roller body 1311 of the developing roller 131, and the roller body 1311 is charged to adsorb the developer. Since the roller body 1311 is not electrically connected to the roller shaft 1312, the roller shaft 1312 does not receive electric energy. In some embodiments, the roller shaft 1312 can receive electric energy.

[0071] A second mounting hole 12321 is provided on the second electrical contact portion 1232. The second mounting hole 12321 is a through hole in the second direction. One of the first mounting holes 13211 on the blade holder 1321 is aligned with the second mounting hole 12321. Preferably, the first mounting hole 13211 on the blade holder 1321 that is closer to the second end 12 in the first direction is aligned with the second mounting hole 12321. A third mounting hole 101 is provided on the cartridge 10. The third mounting hole 101 is aligned with the first mounting hole 13211 and the second mounting hole 12321. When the doctor blade 132 and the electrode 123 are mounted on the cartridge 10, the third mounting hole 101 is aligned with the first mounting hole 13211 and the second mounting hole 12321. Then, through fasteners such as screws passing through all three at the same time, while the doctor blade 132 and the electrode 123 are stably mounted on the cartridge 10, the doctor blade 132 and the electrode 123 can be stably contacted to ensure the stable transmission of electric energy.

[0072] That is, in this embodiment, the electrode 123 is not electrically connected to the powder feeder 133. The doctor blade 132 serves as an intermediate member. The electrode 123 is electrically connected to the roller body 1311 of the developing roller 131 through the doctor blade 132 to transfer electric energy. In some embodiments, another intermediate member can be provided to transfer electric energy, or the electrode 123 can directly contact the roller body 1311.

[0073] In this embodiment, the electrode 123 is preferably an iron sheet, and in other embodiments, it can be other conductive materials such as conductive resin.

[0074] Embodiment Two

[0075] Except as otherwise specified, the structure of the developing cartridge 1 in this embodiment is the same as that in Embodiment One. The difference between this embodiment and Embodiment One lies in the structure of the developing assembly.

[0076] Such as Figure 5As shown, in this embodiment, the developing component includes a developing roller 131, a blade 132, and a powder feeding member 133. The developing roller 131 and the blade 132 are the same as those in the first embodiment, and will not be elaborated herein. In this embodiment, the electrode 123 includes a first contact portion 1231, a second electrical contact portion 1232, a connecting portion 1233, and a third electrical contact portion 1234. The connecting portion 1233 contacts the cartridge 10 so that the electrode 123 is supported by the cartridge 10 or the second cover 121. The first contact portion 1231 directly or indirectly receives the electrical energy output by the image forming apparatus. The second electrical contact portion 1232 contacts the blade 132 to transfer electrical energy. The blade 132 contacts the roller main body 1311 of the developing roller 131 so that the electrode 123 is electrically connected to the roller main body 1311.

[0077] In this embodiment, the powder feeding member 133 is specifically implemented as a friction member. The powder feeding member 133 is fixedly disposed inside the cartridge 10. The powder feeding member 133 extends in the first direction. The powder feeding member 133 contacts the roller main body 1311 of the developing roller 131. In this embodiment, the powder feeding member 133 is preferably a sponge. When the developing roller 131 rotates, the roller main body 131 frictionally contacts the powder feeding member 133, and the powder feeding member 133 transfers the developer to the developing roller 131.

[0078] A conductive member 138 is further disposed inside the cartridge 10. The conductive member 138 is preferably a steel sheet. The conductive member 138 contacts the powder feeding member 133, preferably between the bottom of the cartridge 10 and the powder feeding member 133, that is, the powder feeding member 133 presses the conductive member 138. An electrical receiving end 1381 is disposed near the second end 12 of the conductive member 138. The electrical receiving end 1381 contacts the third electrical contact portion 1234 to receive the electrical energy transferred by the electrode 123.

[0079] In this embodiment, the powder feeding member 133 is made of a conductive material, preferably a conductive sponge. The powder feeding member 133 contacts the conductive member 138 to receive electrical energy and become charged. The charged adsorption of the powder feeding member 133 can better adsorb the developer, so that the powder feeding member 133 can better transfer the developer to the developing roller 131.

[0080] In some embodiments, the electrode 123 may also directly contact the powder feeding member 133 to transfer electrical energy.

[0081] In other embodiments, the conductive member 138 may not be provided. When the powder feeding member 133 contacts the roller main body 1311, it receives the electrical energy transferred by the roller main body 1311 and becomes charged.

[0082] In other embodiments, the conductive member 138 may not be provided. The powder feeding member 133 is made of an insulating material. The powder feeding member 133 cannot receive the electrical energy output by the image forming apparatus. The powder feeding member 133 only frictions with the roller main body 1311 to transfer the developer.

[0083] Embodiment 3:

[0084] Unless otherwise specified, the structure of the developing cartridge 1 in this embodiment is the same as that in the first embodiment. The difference between this embodiment and the first embodiment lies in the structure of the powder feeding member.

[0085] As Figure 6 shown, the transmission assembly is disposed at the first end 11 of the cartridge body 10. The transmission assembly includes a driving portion rotatably mounted on the first end 11 of the cartridge body 10, and the rotation axis of the driving portion is parallel to the first direction. The driving portion includes a driving gear 43 and a power receiving portion 40 integrally formed coaxially. The driving gear 43 is closer to the first end 11 of the cartridge body 10 than the power receiving portion 40 in the first direction. The power receiving portion 40 is configured to receive the power output by the image forming apparatus and transmit the power to the gear on the transmission assembly.

[0086] In this embodiment, the powder feeding member is specifically embodied as a rotating member 135. There are a plurality of rotating members 135, and the plurality of rotating members 135 are arranged along the first direction. Their rotation axes are parallel and intersect with the first direction. Preferably, the rotation axis of the rotating member 135 is parallel to the third direction, that is, the rotation axis of the rotating member 135 is perpendicular to both the first direction and the second direction. The rotating member 135 is rotatably supported by a support shaft 136, and the circumferential surface of the rotating member 135 contacts the roller main body 1311 of the developing roller 131 to transfer the developer to the developing roller 131. The rotating member 135 can receive the driving force from the power receiving portion 40 to rotate, or it can not receive the driving force from the power receiving portion 40. When the rotating member 135 does not receive the driving force, it can be in a stationary state or can be slightly rotated under the rotation of the developing roller.

[0087] As Figure 6As shown, the rotating member 135 rotates by receiving the driving force from the power receiving portion 40. Specifically, in this embodiment, the transmission assembly further includes a first transmission gear 41, a second transmission gear 42, and a third transmission gear 44. The first transmission gear 41 and the second transmission gear 42 are second-stage bevel gears that mesh with each other and are used to convert and transmit the driving force of the power receiving portion 40 in a different direction. Specifically, both the first transmission gear 41 and the second transmission gear 42 respectively have a straight tooth portion and a bevel tooth portion. The driving gear 43 meshes with the straight tooth portion of the first transmission gear 41, and the bevel tooth portion of the first transmission gear 41 meshes with the bevel tooth portion of the second transmission gear 42. When transmitting the driving force on the driving gear 43 that rotates around the axis extending in the first direction to the second transmission gear 42, the second transmission gear 42 rotates around the axis extending in the third direction. The straight tooth portion of the second transmission gear 42 meshes with the third transmission gear 44, and the third transmission gear 44 is fixedly coaxially rotated with any one of the support shafts 136 (preferably the first support shaft near the driving end). At the same time, the support shafts 136 on the plurality of rotating members 135 are connected by a belt 137 (or a chain). That is, the third transmission gear 44 drives the plurality of rotating members 135 to rotate, so that the rotating members 135 convey the developer to the powder feeding roller 131.

[0088] As Figure 7 Shown is a variant of the third embodiment, where the rotating member 135 does not rotate by receiving the driving force from the power receiving portion 40. Specifically, in this solution, the support shafts 136 of the plurality of rotating members 135 are only connected by a belt 137 (or a chain), and there are no gears such as the first transmission gear 41 that transmit the driving force to the rotating member 135. And in this solution, the rotation axis of the rotating member 135 is inclined with respect to the first direction and the third direction, so that the plurality of rotating members 135 are in contact with the roller main body 1311. At the same time, when the developing roller 131 rotates, the component of the frictional force can cause the rotating member 135 to rotate together with the developing roller 131 to feed powder to the developing roller 131.

[0089] The electrode 123 further includes a third electrical contact portion (not shown), and the third electrical contact portion contacts the rotating member 135 to electrically connect the electrode to the powder feeding member. That is, the electrode 123 transfers electrical energy to the developing roller 131 and the powder feeding member. In some other embodiments, the electrode 123 may not be electrically connected to the rotating member 135.

[0090] The rotating member 135 can be made of a soft material. When the circumferential surface of the rotating member 135 contacts the roller body 1311, the rotating member 135 can undergo a certain deformation under the pressing force of the roller body 1311, thereby increasing the contact area between the rotating member 135 and the roller body 1311, and thus better conveying the developer to the roller body 1311. In some embodiments, the rotating member 135 can be made of a material with a porous structure, such as sponge or rubber. The material itself has a micro-porous structure and can better adsorb the developer. In this embodiment, the rotating member 135 is made of a conductive material, such as conductive sponge, which is electrically connected to the electrode 123 and thus charged, and can better adsorb the developer. In other embodiments, the rotating member 135 may not be electrically connected to the electrode 123, that is, not charged, and is made of an insulating material.

[0091] Embodiment 4

[0092] This embodiment is similar to Embodiment 2, and the main difference lies in: the structure of the powder feeding member 133 is different.

[0093] As Figure 8 - Figure 9 shown, the developing cartridge 1 is detachably mounted on the drum unit 2. The developing cartridge 1 can be detachably mounted together with the drum unit 2 to the image forming apparatus. The drum unit 2 includes a right frame 21 and a left frame 22. The right frame 21 and the left frame 22 are oppositely arranged in the first direction. After the developing cartridge 1 is mounted on the drum unit 2, the developing cartridge 1 and the drum unit 2 are equivalent to one body, and the developing cartridge 1 and the drum unit share an end face. At least a part of the photosensitive drum 24 is covered by the front frame. The photosensitive drum 24 is used to receive the developer provided by the developing cartridge 1. The developer is mainly toner, form an electrostatic latent image, and display the image on the imaging sheet (such as paper). The drum unit 2 further includes a first guide rail 211 and a second guide rail 221. The first guide rail 211 is located on the right frame 21, and the second guide rail 221 is located on the left frame 22. The first guide rail 211 and the second guide rail 221 are used to guide the developing cartridge 1 to be more conveniently mounted on the drum unit 2 during the process of mounting the developing cartridge 1 to the drum unit 2. The drum unit 2 is further provided with a first pushing member 212 and a second pushing member 222. The first pushing member 212 is close to the right frame 21, and the second pushing member 222 is close to the left frame 22. The first pushing member 212 and the second pushing member 222 are symmetrically arranged in the first direction. A first elastic member (not shown in the figure) is further provided between the first pushing member 212 and the drum unit 2 in the second direction, and a second elastic member (not shown in the figure) is provided between the second pushing member 222 and the drum unit 2 in the second direction. Due to the existence of the elastic members, when the developing cartridge 1 is mounted on the drum unit 2, the elastic members apply a pushing force in the second direction towards the photosensitive drum 24 to the developing cartridge 1 through the two symmetrically arranged pushing members.

[0094] As Figure 10 - Figure 18As shown, this embodiment provides a developing cartridge 1, which includes a cartridge body 10, a developing component, a conductive component, and a component to be detected.

[0095] The cartridge body 10 has a first end 11 and a second end 12 that are oppositely arranged in a first direction, a third end 13 and a fourth end 14 that are oppositely arranged in a second direction, and a fifth end 15 and a sixth end 16 that are oppositely arranged in a third direction. A first cover 111 is detachably arranged at the first end 11 of the cartridge body 10. The first cover 111 is located at the first end 11 of the cartridge body 10 and is fixedly installed on the cartridge body 10 in a detachable manner. The first cover 111 has a first guiding member 1111, and the first guiding member 1111 is a cylindrical protrusion extending away from the cartridge body 10 along the first direction. The first guiding member 1111 is used to cooperate with the first guide rail 211 on the drum assembly 2 during the installation of the developing cartridge 1 onto the drum assembly 2.

[0096] The developing cartridge 1 is provided with a developing roller 131, a powder discharging blade 132, and a powder feeding member 133 at the third end 13. The developing roller 131 includes a roller body 1311 and a roller shaft 1312. At the two ends of the developing roller 131 where it is fixed to the cartridge body 10, there is also a sealing sponge, including a first sealing sponge 1341 and a second sealing sponge 1342. In the first direction, the sealing sponge is fixed to the cartridge body 10, and the roller body 1311 on the developing roller 131 is installed on the cartridge body 10 through the sealing sponge 134, which can effectively prevent the leakage of the developer and the wear caused by the hard interference between the roller body 1311 and the cartridge body 10, that is, the sealing sponge is located between the roller body 1311 and the cartridge body 10. The developing roller 131 contacts the photosensitive drum 24 on the drum assembly 2, and the developing roller 131 transfers the developer to the photosensitive drum 24.

[0097] In this application, the second bearing 122 also has a second guiding member 1221, which cooperates with the second guide rail 221 on the drum assembly 2 after the developing cartridge 1 is installed in the drum assembly 2. When the developing cartridge 1 is installed in the drum assembly 2, the first guiding member 181 and the second guiding member 1221 cooperate with the first guide rail 211 and the second guide rail 221 respectively, enabling the developing cartridge 1 to be correctly and quickly installed in cooperation with the drum assembly 2.

[0098] The developing cartridge 1 further includes a first bearing 112 and a second bearing 122. The first bearing 112 and the second bearing 122 are oppositely arranged at the first end 11 and the second end 12 of the cartridge body 10, used to support the rotation of the developing roller 131 relative to the cartridge body 10 and limit and fix the developing roller 131 at the same time, preventing the developing roller 131 from moving during rotation. And the first bearing 112 is made of a conductive material, and the first bearing 112 is also provided with a first groove 1121 and a second groove.

[0099] In the present application, the first bearing 112 and the second bearing 122 are made of conductive materials. In other embodiments, one of the first bearing 112 and the second bearing 122 may be made of conductive material and the other may be made of non-conductive material. It is also possible that both the first bearing 112 and the second bearing 122 are made of non-conductive materials, and there is no excessive limitation in the present application specifically.

[0100] The developing cartridge 1 further includes a doctor blade 132, and the doctor blade 132 is used to contact the developing roller 131 and control the thickness of the developer layer on the roller body 1311 of the developing roller 131. The doctor blade 132 extends in the first direction.

[0101] It is known that the doctor blade 132 in the present application is a steel blade. In some embodiments, the doctor blade 132 can be made of other materials, which can be conductive materials or non-conductive insulating materials. When observed from the first direction, the blade holder of the doctor blade 132 is generally an L shape.

[0102] As Figure 12 - 15 shown, the developing cartridge 10 further includes a powder feeding member 133. The powder feeding member 133 is specifically implemented as a powder feeding mesh. In the present application, the developing cartridge 1 does not have a powder feeding roller and corresponding powder feeding gears. The powder feeding member 133 is fixedly arranged and does not receive the driving force from the power receiving portion. The powder feeding member 133 extends in the first direction and is supported by both ends of the cartridge body 10. The powder feeding member 133 is farther from the photosensitive drum 24 than the developing roller 131 in the second direction, and there is a certain distance between the powder feeding member 133 and the roller body 1311 in the second direction. The powder feeding member 133 includes a conductive portion 1331 and a grid portion 1332. In the first direction, the conductive portion 1331 is arranged at the right end of the powder feeding member 133 (the end close to the first end 11 in the first direction, such as Figure 13 the conductive portion 1331 shown by the solid line). When the powder feeding member 133 is installed on the developing cartridge 1, the conductive portion 1331 is connected to the first bearing 112. Specifically, it is connected through the second groove on the first bearing 112.

[0103] In this embodiment, the powder feeding member 133 is made of a hard material. A plurality of through holes are provided on the powder feeding member 133. Different from other embodiments where the powder feeding member 133 is directly made of a material with a fine hole-like structure, in this embodiment, the through holes are formed by machining on the hard material. The powder feeding member 133 is made of a conductive material.

[0104] The developing cartridge 1 further includes a bracket 17 and a storage medium 18. The storage medium 18 has an electrical contact surface 181. The storage medium 18 is detachably mounted on the bracket 17. The bracket 17 is provided with a buckle, and the bracket 17 is detachably mounted on the first cover 111 through the buckle. In the second direction, the storage medium 181 is closer to the fourth end 14 relative to the developing roller 131. In other applications, the storage medium 171 can be fixed on the bracket 17 by means of snap connection or welding, etc., and no specific limitation is made.

[0105] The cartridge body 1 is further provided with a second cover 121 at the second end 12. The second cover 121 is detachably mounted on the cartridge body 10. The second cover 121 is provided with an electrode 123. The electrode 123 is electrically connected to the doctor blade 132, and the roller main body 1311 is powered through the doctor blade 132. Its specific structure and the power supply process are similar to those of the first embodiment. The only difference from the first embodiment is that the electrode 123 is only electrically connected to the doctor blade 132, and other details will not be elaborated here. The second cover 121 is also used to protect the components to be detected. The components to be detected include a first gear 50, a second gear 51, and a component to be detected 52. Specifically, the second cover 121 is used to protect the component to be detected 420. After the developing cartridge 1 and the drum assembly 2 are installed in the image forming apparatus together, the detection component in the image forming apparatus can detect the component to be detected, thereby identifying the developing cartridge 1 and completing the recognition of the developing cartridge.

[0106] As Figure 14 shown, one end of the doctor blade 132 is electrically connected to the electrode 123, and the other end is connected to the first bearing 112 through the first groove 1121. The first bearing 112 is made of a conductive material. The conductive portion 1331 on the powder feeding member 133 is connected to the first bearing 112 through the second groove. That is, through the sequential electrical connection of the electrode 123, the doctor blade 132, the first bearing 112, and the powder feeding member 133, the electrode 123 is electrically connected to the doctor blade 123. While the electrode 123 powers the developing roller 131, it also powers the powder feeding member 133 through the first bearing 112, so that the powder feeding member 133 also has a voltage.

[0107] When the developing cartridge 1 starts to work, the electrode 123 makes the powder feeding member 133 charged through the doctor blade 123. At the same time, the powder feeding member 133 also has a plurality of grid portions 1332. The grid portions 1332 are through holes, which are arranged and combined on the powder feeding member 133 in the first direction and the second direction. The powder in the cartridge body 10 can be evenly ionized through the grid portions 1332 on the powder feeding member 133, so as to be better adsorbed onto the roller main body 1311 of the developing roller 131 to complete the developing work.

[0108] As Figure 16As shown, the developing cartridge 1 is further provided with a powder inlet 123 at the second end 12 for filling powder into the interior of the cartridge body 10 of the developing cartridge 1. It also has a lid at the opening for sealing the powder inlet 123 with the lid after powder filling to prevent toner from leaking out of the cartridge body 10 through the powder inlet 123.

[0109] The developing cartridge 1 is further provided with a first pushing portion 1112 and a second pushing portion 1212 at the fourth end 14 in the second direction. In this embodiment, both the first pushing portion 1112 and the second pushing portion 1212 are provided on the cartridge body 10, and the rest of the structure is exactly the same as that of the first embodiment. The pushing portion can be a U-shaped, C-shaped or V-shaped protrusion, or other shapes, which are not specifically limited here. The first pushing portion 1112 and the second pushing portion 1212 cooperate with the first pushing member 212 and the second pushing member 222 of the drum assembly 2 when the developing cartridge 1 is installed on the drum assembly 2 to receive the pushing force applied by the first pushing member 212 and the second pushing member 222 in the second direction towards the photosensitive drum 24, so that the developing roller 131 on the developing cartridge 1 can be closely attached to the photosensitive drum 24.

[0110] As Figure 17 shown, in this application, when the developing cartridge 1 and the drum assembly 2 are installed together in the image forming apparatus, under the action of the pushing force, the developing roller 131 is closely attached to the photosensitive drum 24. When the image forming apparatus applies a driving force to the photosensitive drum through the drum drive head to make the photosensitive drum rotate, the developing roller 131 closely attached to the photosensitive drum 24 can also be driven to rotate together with the photosensitive drum 24 due to the frictional force.

[0111] In this application, in order to enable the developing roller 131 to generate sufficient frictional force with the drum assembly 24, in this application, the developing roller 131 is made to fit more closely to the photosensitive drum by increasing the pushing force, so as to provide the frictional force required for the photosensitive drum 24 to drive the developing roller 131. The ways to increase the pushing force include increasing the elastic force of the elastic member between the pushing portion and the drum assembly, or increasing the size of the pushing protrusion in the second direction, so that when the developing cartridge 1 is installed on the drum assembly 2, the elastic member is compressed more severely, thereby generating a greater pushing force. In addition to increasing the pushing force to increase the frictional force in this way, the frictional force between the developing roller 131 and the photosensitive drum 24 can also be increased by changing the material of the roller body 1311. There can also be other ways to increase the frictional force between the developing roller 131 and the photosensitive drum 24, which are not specifically limited here.

[0112] As Figure 18As shown in the figure, a component to be detected is also provided at the second end 12 of the cartridge 10. The component to be detected includes a first gear 50, which is coaxially and fixedly arranged with the developing roller and can rotate with the rotation of the developing roller 131. The detected part 52 is installed on the second end 12 and is specifically rotatably installed on the second bearing 122. The second gear 51 is specifically an idler gear used to connect the first gear 50 and the detected part 52. When the photosensitive drum 24 drives the developing roller 131 to rotate through friction, the first gear 50 rotates together with the developing roller 131, and the first gear 50 drives the detected part 52 to rotate through the second gear 51, so that the detected part 52 is detected by the detector in the image forming device, and the developing cartridge 1 is recognized by the recognition machine.

[0113] In the present application, in order to reduce the resistance of the photosensitive drum 24 to drive the developing roller 131, the powder feeding roller and the stirring frame are cancelled in the developing cartridge 1. Therefore, there is no need to set the powder feeding gear, the developing gear, the stirring gear, the driving head and the driving gear, that is, there is no transmission part at the first end of the cartridge 10, which maximally reduces the driving resistance on the cartridge 10 and enables the photosensitive drum 24 to better drive the developing roller 131.

[0114] It can be known that in the present application, no transmission parts (gears) are provided at the first end of the cartridge 10, and the powder feeding roller and the stirring frame are cancelled, which is the optimal way. That is, in this solution, the driving resistance on the developing cartridge 1 is the smallest, and the photosensitive drum 24 can drive the developing roller 131 with the smallest frictional force. In other embodiments, according to the different frictional forces between the photosensitive drum 24 and the developing roller 131, some components can be appropriately added. That is, when the frictional force between the developing roller 131 and the photosensitive drum 24 is sufficient to drive the developing roller 131 and the powder feeding roller, the developing gear and the powder feeding gear can also be provided at the first end of the cartridge 10. Specifically, no more limitations are made here, and it is determined by the actual application situation which components need to be reserved on the developing cartridge 1.

[0115] In other embodiments, the developing cartridge 1 may not be provided with the first gear 50, the second gear 51 and the detected part 52. The information of the developing cartridge 1 is transmitted to the image forming device through the voltage change on the powder outlet blade 132, and thus the developing cartridge 1 is recognized by the image forming device.

[0116] Further, as Figure 13 shown by the dotted line of the conductive part 1331, in other embodiments, the conductive part 1331 on the powder feeding part 133 is arranged on the side close to the second end 12. At the same time, the first bearing 112 does not need to be made of conductive material. The powder feeding part 133 is directly electrically connected to the electrode 123 through the conductive part 1331, or the second bearing 122 is made of conductive material, and the electrode 123 makes the powder feeding part 133 have a certain voltage through the second bearing 122. Specifically, no more limitations are made here.

[0117] By eliminating the powder delivery roller and providing a powder delivery member capable of conducting electricity, the developer in the cartridge can be normally supplied to the developing roller. The developing roller is driven to rotate by the frictional force between the photosensitive drum and the developing roller. Thus, there is no need to provide a drive head / drive gear, and no transmission components need to be provided at the first end of the developing cartridge, greatly reducing the number of components of the developing cartridge, lowering the manufacturing cost of the developing cartridge, and simplifying the structural dimensions of the developing cartridge.

[0118] Embodiment Five:

[0119] This embodiment is similar to Embodiment Two, and the main difference lies in: the structure and installation position of the powder delivery member 133 are different.

[0120] As Figure 19 - 21 shown, this embodiment provides a developing cartridge 1. The developing cartridge 1 is detachably installed on a drum assembly having a rotatable photosensitive drum to form a processing cartridge. The processing cartridge can be detachably installed on the image forming apparatus from back to front. The developing cartridge 1 includes a cartridge body 10, a developing assembly, a transmission assembly, and an identification assembly.

[0121] The developing assembly includes a developing roller 131 and a stirring frame 139. The developing roller 131 and the stirring frame 139 are rotatably supported at the first end 11 and the second end 12 of the cartridge body 10, and the rotation axes of the developing roller 131 and the stirring frame 139 both extend in the first direction. In the second direction, the developing roller 131 is closer to the third end 13 than the stirring frame 139.

[0122] The transmission assembly includes a driving part. The driving part is rotatably provided at the first end 11 of the cartridge body 10, and the rotation axis of the driving part extends in the first direction. The driving part includes a power receiving part 40 and a driving gear 43. The power receiving part 40 is used to receive the power output by the image forming apparatus. In the first direction, the power receiving part 40 is farther from the second end 12 than the driving gear 43.

[0123] The transmission assembly further includes a developing gear 45, an idler gear 46, and a stirring gear 47. The developing gear 45, the idler gear 46, and the stirring gear 47 are directly or indirectly meshed with the driving gear 43 to receive the power output by the image forming apparatus. The developing gear 45 is coaxially and fixedly installed at one end of the developing roller 131 close to the first end 11 of the cartridge body 1 and drives the developing roller 131 to rotate. The idler gear 46 includes a large-diameter gear and a small-diameter gear that rotate coaxially. The large-diameter gear is meshed with the driving gear 43, and the small-diameter gear is meshed with the stirring gear 47. The stirring gear 47 is coaxially and fixedly installed at one end of the stirring frame 139 close to the first end 11 of the cartridge body 10 and drives the stirring frame 139 to rotate.

[0124] As Figure 22As shown, a toner cartridge 31 and a developing cartridge 30 that communicate with each other are formed inside the cartridge body 10. In the second direction, the developing cartridge 30 is located in front of the toner cartridge 31. The toner cartridge 31 accommodates a stirring frame 139, and the developing cartridge 30 accommodates a developing roller 131. The stirring frame 139 includes a frame body 1391 and a first stirring blade 1392. The frame body 1391 extends along the first direction, and both ends of the frame body 1391 are rotatably supported on the first end 11 and the second end 12 of the cartridge body. The first stirring blade 1392 extends along the first direction and is fixedly arranged on the frame body 1391. The first stirring blade 1392 can rotate together with the frame body 1391. The first stirring blade 1392 is used to stir the developer in the toner cartridge 31 to prevent the developer from caking, and the first stirring blade 1392 is also used to convey the developer in the toner cartridge 31 to the developing cartridge 30.

[0125] The cartridge body 10 includes a partition 103. The partition 103 is used to separate the toner cartridge 31 and the developing cartridge 30. The cross-section of the partition 103 is in an inverted V shape and includes a connected first wall 1031 and a second wall 1032. The first wall 1031 is formed in the developing cartridge 31, and the second wall 1032 is formed in the toner cartridge 31. The developing roller 131 is located in front of the first wall 1301 in the second direction and above the first wall 1031 in the third direction. The size of the first stirring blade 1392 in the second direction is set to be long enough to facilitate the first stirring blade 1392 to convey the developer in the toner cartridge 31 through the second wall 1032 into the first wall 1031. Since the first wall 1031 extends forward and downward, as the developer conveyed to the first wall 1031 accumulates, the developer slides forward and downward, so that the developing roller 131 can continuously receive the developer. The setting method of the first wall 1031 of the partition 103 is simple and does not require a rotatable powder feeding roller, reducing costs. The first wall 1031 can be a plane or a curved surface. The included angle A between the first wall 1031 and the second wall 1032 is approximately 40° - 120°, preferably 60° or 100°, which is convenient for the developer entering the first wall 1031 to slide down to the developing roller 131. The cartridge body 10 includes a lower housing 102 and an upper housing 101 covering the lower housing 102. The partition 103 is arranged on the lower housing 102.

[0126] The developing cartridge 30 is formed with an opening extending along the first direction. The developing roller 131 is located at the opening and at least partially exposed through the opening. The developing cartridge also includes a doctor blade 132. The doctor blade 132 extends along the first direction. The doctor blade 132 is used to limit the thickness of the developer on the developing roller 131. The doctor blade 132 includes a blade frame body and a blade. The position where the blade contacts the developing roller 131 is above the first wall 1031 in the third direction. The developer scraped off by the blade falls into the first wall 1031, facilitating the developer to slide down to the developing roller 131.

[0127] Please refer to Figure 21, the developing cartridge is further provided with an electrode 123, which is electrically connected to the image forming device to supply electricity to the developing roller 131. The developing roller 131 includes a roller shaft and a roller body covering the roller shaft. The roller body is used to receive the developer, and the electrode 123 is electrically connected to the roller body to further charge the developer on the developing roller 131. The electrode 123 is specifically installed at one end of the roller shaft close to the second end 12.

[0128] Further, a powder feeding member 133 is provided on the first wall 1031. The powder feeding member 133 is fixedly arranged relative to the first wall 1031 and contacts the roller body, so that when the developing roller 131 rotates, friction is generated between the powder feeding member 133 and the roller body to charge the developer, so that the developer can better adhere to the roller body with a certain voltage. The powder feeding member 133 specifically matches the shape of the first wall 1031, and the powder feeding member 133 is adhered to the first wall 1031, so that the installation process of the powder feeding member 133 is simple and the powder feeding member 133 can be reliably fixed to the first wall 1031. The developer conveyed to the first wall 1031 through the second wall 1032 accumulates on the powder feeding member 133. As the developer accumulates, the developer slides forward and downward to the developing roller 131. The powder feeding member 133 is preferably made of rubber, and the rubber surface has a fine porous structure, which can adsorb the developer. While the developing roller 131 rotates, the developer is adsorbed by friction with the powder feeding member 133 to charge the developer. The powder feeding member 133 is preferably in the shape of a sheet or a strip.

[0129] In some embodiments, the powder feeding member 133 can be made of a conductive material, such as conductive sponge, and the powder feeding member 133 is directly electrically connected to the electrode 123.

[0130] Such as Figure 23 , as a variant of this embodiment, the powder feeding member 133 is not a sponge attached to the first wall 1031, but a roller-shaped part that does not contact the developing roller 131. The powder feeding member 133 can rotate relative to the cartridge body 10 and is used to stir the developer accumulated on the first wall 1031, so that the developer quickly slides forward and downward to the developing roller 131. A second stirring blade 1333 is fixedly arranged on the powder feeding member 133. The second stirring blade 1333 rotates with the powder feeding member 133 and stirs the developer accumulated on the first wall 1031 to make the developer slide to the developing roller 131. The second stirring blade 1333 does not contact the developing roller 131, and the second stirring blade 1333 does not need to receive the power of the electrode 123. In other embodiments, the powder feeding member 1333 can also move back and forth along the second direction.

[0131] Further, in other ways, the powder feeding member 133 of the roller portion may not be provided with the second stirring blade 1333. The powder feeding member 133 may be made of a conductive material, such as a steel shaft or a wire, and is disposed near the developing roller 131. At the same time, the powder feeding member 133 is connected to the electrode 123 to make the powder feeding member 133 charged, thereby ionizing the developer accumulated on the first wall 1031 and making the developer charged, so as to better adhere to the roller body.

[0132] Another variant of this embodiment is the combination of Embodiment 5 and the variant. That is, the developing cartridge 1 simultaneously has a sponge in direct contact with the developing roller 131 and a roller portion. At this time, the powder feeding member 133 of the developing cartridge 1 is a sponge that is in direct contact with the developing roller 131 and makes the developer charged by friction, and the roller portion stirs the developer accumulated in the developing chamber 30 through the stirring blades thereon, making the friction powder feeding between the developing roller 131 and the powder feeding member 133 more efficient.

[0133] Embodiment 6

[0134] As Figure 24 shown, unless otherwise specified, the structure in this embodiment is the same as the structure in Embodiment 5. The difference between this embodiment and Embodiment 5 is that the developing chamber 30 of this embodiment is provided with a powder feeding member 133, and the powder feeding member 133 is specifically a powder feeding roller. From the first direction of the cartridge body 10, the powder feeding member 133 overlaps with the developing roller 131 in the third direction, and most of the projection of the powder feeding member 133 in the third direction overlaps with the projection of the developing roller 131 in the third direction, increasing the amount of developer accommodated in the developing chamber 30. Preferably, the powder feeding member 133 is located directly below the developing roller 131 in the third direction. The powder feeding member 133 includes a powder feeding roller shaft and a powder feeding roller body covering the powder feeding roller shaft. The two ends of the powder feeding roller body in the first direction are rotatably supported on the first end 11 and the second end 12 of the cartridge body 10, and the powder feeding roller body receives the developer in the developing chamber.

[0135] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several deformations and improvements can be made, or the above technical solutions can be freely combined, including freely combining the technical features between the above different embodiments, and these all belong to the protection scope of the present invention.

Claims

1. A developing cartridge for detachably mounting to an image forming apparatus, characterized in that, include: a box body for accommodating a developer and having a first end and a second end in a first direction; a developing roller rotatably disposed on the cartridge body around an axis extending in a first direction; the developing roller comprising a roller shaft and a roller body rotating along the roller shaft; a storage medium comprising an electrical contact surface disposed at the first end; an electrode disposed at the second end and electrically connected to the roller body; as well as A powder feeding member is used to feed the developer to the roller body. The powder feeding member does not rotate around an axis extending along the first direction or the powder feeding member is not electrically connected to the roller body.

2. The developing cartridge according to claim 1, wherein, The powder feeding member does not rotate around an axis extending along the first direction, and the powder feeding member is fixedly arranged on the box body.

3. The developing cartridge according to claim 2, wherein, The powder feeding member is arranged to be in contact with the roller body, and feeds the developer to the roller body by rubbing against the roller body.

4. The developing cartridge according to claim 3, wherein The box body includes a partition portion, the partition portion divides the space inside the box body into a toner bin and a developing bin that communicate with each other, and the developing roller is arranged in the developing bin; The partition portion includes a first wall formed in the developing chamber and a second wall formed in the toner chamber, and the powder feeding member is fixedly arranged on the first wall.

5. The developing cartridge according to claim 4, wherein The included angle between the first wall and the second wall is 40° to 120°.

6. The developing cartridge according to claim 3, wherein, The powder feeding piece is made of soft material.

7. The developing cartridge according to claim 6, wherein The powder feeding member is made of sponge or rubber.

8. The developing cartridge according to claim 2, characterized in that, The powder feeding member does not contact the roller body.

9. The developing cartridge according to claim 8, wherein, The powder feeding member is made of a hard material and is provided with a plurality of through holes, through which the developer can be transported to the roller body.

10. The developing cartridge according to claim 9, wherein The powder feeding member is made of metal or resin.

11. The developing cartridge according to claim 1, wherein, The powder feeding member does not rotate around an axis extending in the first direction. The powder feeding member includes a rotating member rotating around an axis intersecting the first direction. A circumferential surface of the rotating member contacts the roller body to feed the developer thereto.

12. The developing cartridge according to claim 11, wherein, There are a plurality of rotating members arranged along a first direction, the rotation axes of the plurality of rotating members are parallel and adjacent rotating members are in contact with each other; The developing box also includes a power receiving part and a plurality of bevel gears transmission-connected to the power receiving part. The plurality of rotating parts are connected by a chain or a belt. The power receiving part transmits the driving force to the rotating parts through the plurality of bevel gears, thereby driving the plurality of rotating parts to rotate together.

13. The developing cartridge according to any one of claims 2 to 12, characterized in that, The powder feeding member is made of conductive material.

14. The developing cartridge according to claim 1, wherein, The powder feeding member is not electrically connected to the roller body, and the powder feeding member rotates around an axis extending along the first direction and contacts the roller body.

15. The developing cartridge according to any one of claims 1 to 12 and 14, characterized in that, The rollers do not receive electrical energy.

16. The developing cartridge according to claim 1, wherein, The developing box includes a powder knife, which is used to adjust the thickness of the developer layer on the roller body. The electrode is electrically connected to the roller body through the powder knife.

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