Developing box

Abstract

The utility model relates to a developing box which comprises a box body, the box body comprises a powder supply cavity and a powder supplement cavity, a first stirring frame is arranged in the powder supply cavity, and a second stirring frame is arranged in the powder supplement cavity; the transmission assembly comprises a first gear set, a second gear set, a third gear set, a first stirring gear and a second stirring gear, the first stirring gear is connected with the first stirring frame, and the second stirring gear is connected with the second stirring frame; when the first gear set receives forward driving force output by the image forming device, the first gear set can drive the first stirring gear to rotate forwards through the second gear set. When the first gear set receives reverse driving force output by the image forming device, the first gear set can drive the first stirring gear to rotate forwards, and the third gear set drives the second stirring gear to rotate forwards. According to the developing box, the transmission assembly is fixed to the box body in the second direction and the third direction, so that the structure of the transmission assembly is compact, the overall occupied space of the transmission assembly is small, and the size of the developing box is small.

Description

[0001] This application claims priority to Chinese Patent Application No. 202410431883.5, filed on April 10, 2024, entitled "A Developer Cartridge", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of electronic imaging technology, and more particularly to a developing cartridge. Background Technology

[0003] The developing cartridge is mounted on the drum assembly and can be detachably installed into the image forming apparatus along with the drum assembly. The developing cartridge stores developer and includes a developing roller and a powder delivery roller. The powder delivery roller delivers the developer stored in the developing cartridge to the developing roller, which then supplies the developer to the photosensitive drum of the drum assembly. The developing cartridge contains a first chamber and a second chamber, as well as a first stirring frame and a second stirring frame. The first stirring frame is located in the first chamber. The image forming apparatus outputs a forward driving force, causing the first stirring frame to rotate forward, providing the developing roller and powder delivery roller with the developer from the first chamber, allowing the developing cartridge to develop normally. The second stirring frame is located in the second chamber. Once the developer in the first chamber has been consumed to a predetermined level, the image forming apparatus outputs a reverse driving force, causing the second stirring frame to rotate and replenish the developer from the second chamber into the first chamber. A first stirring gear is located at the end of the first stirring frame, and a second stirring gear is located at the end of the second stirring frame.

[0004] In existing technology, a movable gear is provided at the end of the developing cartridge, which can move relative to the cartridge body. When the image forming apparatus outputs a positive driving force, the movable gear moves to a position that can drive the first stirring gear, causing the first stirring frame to rotate forward; when the image forming apparatus outputs a reverse driving force, the movable gear moves to a position that can drive the second stirring gear, causing the second stirring frame to rotate forward. Because the movable gear needs to move relative to the cartridge body, it occupies a large space, resulting in a large developing cartridge volume. Utility Model Content

[0005] This application provides a developing cartridge to solve the problem that the structure of driving the first and second stirring racks occupies a large space, resulting in a large volume of developing cartridge.

[0006] This application provides a developing cartridge, which is detachably installed within an image forming apparatus. The image forming apparatus is capable of outputting a forward driving force and a reverse driving force. The developing cartridge includes:

[0007] A cartridge for containing developer, the cartridge having opposing first and second ends in a first direction, opposing third and fourth ends in a second direction, and opposing fifth and sixth ends in a third direction, the cartridge including a powder supply chamber and a powder replenishment chamber;

[0008] A developing roller is disposed at the third end, and the developing roller is rotatable about an axis extending along the first direction;

[0009] The first stirring rack is disposed inside the powder supply chamber;

[0010] The second stirring rack is disposed in the powder replenishment chamber and is used to replenish the developer in the powder replenishment chamber to the powder supply chamber.

[0011] A transmission assembly is disposed at the first end. The transmission assembly includes gear sets, namely: a first gear set, a second gear set, and a third gear set. The transmission assembly also includes a first stirring gear and a second stirring gear. The first stirring gear is connected to the first stirring frame, and the second stirring gear is connected to the second stirring frame.

[0012] When the first gear set receives the positive driving force output by the image forming apparatus, the first gear set can drive the first stirring gear to rotate forward through the second gear set. When the first gear set receives the reverse driving force output by the image forming apparatus, the first gear set can drive the first stirring gear to rotate forward, and the third gear set drives the second stirring gear to rotate forward.

[0013] In one possible design, the gear set includes a drive gear, a ratchet, and a driven gear. The ratchet is located between the drive gear and the driven gear. The ratchet can rotate with the rotation of the drive gear. The driven gear does not transmit power to the ratchet in either the forward or reverse rotation direction. The driven gear does not transmit power when its rotation direction is opposite to that of the drive gear.

[0014] The first gear set includes: a first transmission gear, a first ratchet, and a first driven gear. When the first transmission gear rotates forward, there is no driving force transmission between the first transmission gear and the first driven gear. When the first transmission gear rotates in reverse, the first transmission gear drives the first driven gear to rotate in reverse.

[0015] The second gear set includes: a second transmission gear, a second ratchet, and a second driven gear. When the second transmission gear rotates forward, there is no driving force transmission between the second transmission gear and the second driven gear. When the second transmission gear rotates in reverse, the second transmission gear drives the second driven gear to rotate in reverse.

[0016] The first transmission gear is provided with a power receiving unit, which can receive the forward driving force and the reverse driving force output by the image forming apparatus. The first driven gear and the second driven gear mesh with the first stirring gear, the second transmission gear meshes with the first transmission gear, and the second driven gear meshes with the first stirring gear, so that when the first transmission gear rotates forward, the second driven gear drives the first stirring gear to rotate forward; when the first transmission gear rotates in reverse, the first driven gear drives the first stirring gear to rotate forward.

[0017] In one possible design, the third gear set includes: a third transmission gear, a third ratchet, and a third driven gear. When the third transmission gear rotates forward, there is no driving force transmission between the third transmission gear and the third driven gear; when the third transmission gear rotates in reverse, the third transmission gear drives the third driven gear to rotate in reverse.

[0018] The third transmission gear meshes with the second transmission gear, and the third driven gear is directly or through an even number of idler gears connected to the second stirring gear. When the first transmission gear rotates forward, the third gear set does not transmit driving force to the second stirring gear; when the first transmission gear rotates in reverse, the third driven gear drives the second stirring gear to rotate forward.

[0019] In one possible design, when the first drive gear reverses, the third driven gear drives the second stirring gear to rotate forward, either directly or through the two idler gears.

[0020] In one possible design, the third gear set includes a third transmission gear, which is connected to the second stirring gear via an odd number of idler gears, so that when the first transmission gear rotates forward or reverse, the third transmission gear drives the second stirring gear to rotate forward.

[0021] In one possible design, when the first drive gear rotates forward or reverse, the third drive gear drives the second stirring gear to rotate forward via an idler wheel.

[0022] In one possible design, the first gear set includes a first transmission gear, the second gear set includes a second transmission gear, the third gear set includes a third transmission gear, the first transmission gear meshes with the second transmission gear, and the second transmission gear is connected to the first stirring gear and the second stirring gear in a driving connection.

[0023] The first transmission gear is provided with a power receiving unit, which can receive the positive driving force output by the image forming apparatus to drive the first stirring gear and the second stirring gear to rotate forward;

[0024] The developing chamber also includes a developing gear, and the first stirring gear is connected to the developing gear through multiple idler gears to drive the developing gear to rotate.

[0025] In one possible design, the second transmission gear meshes directly with the first stirring gear;

[0026] The second transmission gear meshes with the second stirring gear via the third transmission gear and an odd number of idler gears; the first stirring gear meshes with the developing gear via two of the idler gears.

[0027] In one possible design, the powder supply chamber is provided with a rib near the third end, and the rib protrudes into the powder supply chamber in a third direction.

[0028] In one possible design, the powder supply chamber is provided with a light detection hole near the second end, and the light detection hole is located on the third side upwards near the sixth end;

[0029] The optical detection aperture is used to detect the remaining amount of developer in the powder supply chamber. When the optical detection aperture detects that the developer capacity has decreased to a predetermined value, the image forming apparatus changes from outputting a positive driving force to outputting a reverse driving force.

[0030] In this application, since the transmission assembly is fixed to the cartridge body in the second and third directions, its structure is relatively compact, and it occupies less space, resulting in a smaller developing cartridge volume. Furthermore, because the transmission assembly is immovable relative to the cartridge body in the second and third directions, its structure is more stable.

[0031] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the developing cartridge provided in this application in a specific embodiment;

[0033] Figure 2 for Figure 1 Schematic diagram of the structure of the first end of the developing chamber

[0034] Figure 3 for Figure 1 A schematic diagram of the structure of the second end of the developing cartridge;

[0035] Figure 4 This is a cross-sectional view of the developing chamber in Embodiment 1, wherein the developing chamber receives the positive driving force output by the image forming apparatus;

[0036] Figure 5This is a cross-sectional view of the developing chamber in Embodiment 1, wherein the developing chamber receives the reverse driving force output by the image forming apparatus;

[0037] Figure 6 This is a schematic diagram of the structure of the first end of the developing cartridge after removing the first protective cover in Embodiment 1;

[0038] Figure 7 This is a partial exploded view of the developing chamber in Example 1;

[0039] Figure 8 for Figure 7 A schematic diagram of the structure of the first transmission gear in the middle;

[0040] Figure 9 for Figure 7 A schematic diagram of the structure of the first ratchet in the middle;

[0041] Figure 10 for Figure 7 A schematic diagram of the structure of the first ratchet and the first driven gear;

[0042] Figure 11 This is a schematic diagram of the transmission component rotating when the image forming apparatus outputs a positive driving force in Embodiment 1;

[0043] Figure 12 This is a schematic diagram of the transmission component rotating when the image forming apparatus outputs a reverse driving force in Embodiment 1.

[0044] Figure 13 This is a partial exploded view of the developing chamber in Example 2;

[0045] Figure 14 This is a schematic diagram of the transmission component rotating when the image forming apparatus outputs a positive driving force in Embodiment 2;

[0046] Figure 15 This is a schematic diagram of the transmission component rotating when the image forming apparatus outputs a reverse driving force in Embodiment 2;

[0047] Figure 16 This is a schematic diagram of the structure of the first end of the developing cartridge after removing the first protective cover in Example 3;

[0048] Figure 17 This is a partial exploded view of the developing chamber in Example 3;

[0049] Figure 18 This is a schematic diagram of the transmission assembly rotating when the image forming apparatus outputs driving force in Embodiment 3;

[0050] Figure 19 This is a cross-sectional view of the developing cartridge in Example 3;

[0051] Figure 20This is a cross-sectional view of a developing cartridge with another structure in Example 3;

[0052] Figure 21 This is an exploded view of the forward output component in Example 4;

[0053] Figure 22 for Figure 21 A schematic diagram of the structure of the first input gear and the fourth ratchet;

[0054] Figure 23 for Figure 21 A schematic diagram of the structure of the second input gear and the fifth ratchet;

[0055] Figure 24 for Figure 21 A schematic diagram of the structure in which the positive output component rotates when receiving a positive driving force;

[0056] Figure 25 for Figure 24 A sectional view;

[0057] Figure 26 for Figure 21 A schematic diagram of the structure in which the forward output component rotates when it receives a reverse driving force;

[0058] Figure 27 for Figure 26 A sectional view.

[0059] Figure label:

[0060] 10-Box body;

[0061] 101-Powder supply chamber; 102-Baffle plate; 103-Powder replenishment port; 104-Powder replenishment chamber; 105-Rib section

[0062] 11-First end;

[0063] 111-First protective cover; 1112-First guide section;

[0064] 12 - Second end;

[0065] 121-Bearing; 1211-Second guide section; 1212-Electrode; 122-Assembly; 1221-Second push section; 1222-Locking section; 123-Powder filling port;

[0066] 13-Third end;

[0067] 131-Developing roller; 132-Powder feeding roller; 133-First stirring frame; 134-Second stirring frame;

[0068] 14 - Fourth end;

[0069] 15 - Fifth end;

[0070] 16 - Sixth end;

[0071] 161 - Optical detection aperture;

[0072] 401-First transmission gear; 4011-Power receiving part; 4013-First fixing part; 4014-First contact surface;

[0073] 402-First ratchet; 4021-First inclined surface; 4022-First force-bearing surface; 4023-First fixed part; 4024-First contact surface;

[0074] 403 - First driven gear; 4031 - Second inclined surface; 4032 - Second force-bearing surface;

[0075] 411-Second transmission gear; 412-Second ratchet; 413-Second driven gear;

[0076] 421 - Third transmission gear; 422 - Third ratchet; 423 - Third driven gear;

[0077] 43 - First stirring gear;

[0078] 44 - Second stirring gear;

[0079] 45 - Developing gear;

[0080] 46 - Powder feeding gear;

[0081] 471 - First idler gear; 472 - Second idler gear; 473 - Third idler gear; 474 - Fourth idler gear;

[0082] 50 - First input gear; 501 - Third inclined plane; 502 - Third force-bearing surface;

[0083] 51-Fourth ratchet; 511-Fourth inclined plane; 512-Fourth force-bearing surface; 513-D-shaped hole;

[0084] 52-Drive shaft; 53-First helical gear; 54-Second helical gear; 55-Retaining part; 56-Second input gear; 57-Fifth ratchet; 58-Output gear.

[0085] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0086] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0087] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0088] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0089] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0090] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0091] This application provides a developing cartridge that can contain developer and can be installed inside a drum assembly, and together with the drum assembly, it is installed in an image forming apparatus for development.

[0092] like Figure 1 As shown in the diagram, the left-right direction is the first direction X, the front-back direction is the second direction Y, and the up-down direction is the third direction Z. The developing cartridge has a cartridge body 10, with a first end 11 and a second end 12 disposed opposite each other in the first direction X, a third end 13 and a fourth end 14 disposed opposite each other in the second direction Y, and a fifth end 15 and a sixth end 16 disposed opposite each other in the third direction Z.

[0093] The developing cartridge includes a developing assembly, a transmission assembly, and an identification assembly.

[0094] The developing assembly includes a developing roller 131, a powder feeding roller 132, and a stirring frame, all of which are rotatably mounted between a first end 11 and a second end 12. The rotation axes of the developing roller 131, the powder feeding roller 132, and the stirring frame all extend along a first direction X. The powder feeding roller 132 is disposed adjacent to the developing roller 131, and in a second direction Y, the developing roller 131 is closer to the third end 13 of the cartridge 10 than the powder feeding roller 132. The powder feeding roller 132 delivers developer to the developing roller 131. The stirring frame agitates the developer within the receiving cavity, preventing developer agglomeration and providing sufficient developer to the powder feeding roller 132, enabling the powder feeding roller 132 to properly supply powder to the developing roller 131.

[0095] like Figure 2 As shown, the identification component includes a chip holder 31 and a chip 32 disposed on the chip holder 31. The chip holder 31 is disposed on the first end 11 of the developing cartridge, and the chip 32 is disposed at the third-direction Z end of the chip holder 31. The chip 32 can cooperate with the electrical terminals on the image forming apparatus and transmit information of the developing cartridge. The chip 32 is used to store relevant information of the developing cartridge, such as the age of the developing cartridge, storage information, consumable capacity, number of printable pages, etc., and transmits the relevant information of the developing cartridge to the image forming apparatus when the developing cartridge and drum assembly are installed in the image forming apparatus. The chip 32 includes a storage medium specifically for storing the developing cartridge information and a point contact surface electrically connected to the image forming apparatus. The storage medium and the point contact surface can be integrally formed or separately formed, both of which are part of the chip 32.

[0096] The first end 11 of the developing cartridge has a first cover 111, which covers at least part of the transmission assembly to protect it. The first cover 111 is provided with a first guide portion 1112, which is a columnar portion extending along the first direction X. When the developing cartridge is installed on the drum assembly, the first guide portion 1112 can cooperate with the guide rail on the drum assembly.

[0097] A chip holder 31 is provided on the first cover 111. In this embodiment, the chip holder 31 and the first cover 111 are separately arranged, and the chip holder 31 and the chip 32 can move together relative to the cartridge 10. In other embodiments, the chip holder 31 is integrally formed with the cartridge 10 or the first cover 111, and the chip 32 and the chip holder 31 can move together relative to the developing cartridge. Alternatively, in other embodiments, the chip holder 31 and the cartridge 10 are separately arranged, but the chip holder 32 is fixedly mounted on the cartridge 10 by screws, clips, or other means.

[0098] The developing cartridge is also provided with a first pushing part (not shown in the figure) at the first end 11. The first pushing part is used to receive the pushing force when it cooperates with the drum assembly, so that the developing cartridge can complete the developing work.

[0099] like Figure 3 As shown, the second end 12 of the housing 10 is also provided with a bearing 121. The bearing 121 has a second guide portion 1211 and an electrode 1212. The bearing 121 is used to fix the developing roller 131 and the powder feeding roller 132. The second guide portion 1211 is a columnar portion extending along the first direction X. The second guide portion 1211 is integrally formed with the bearing 121. The second guide portion 1211 and the first guide portion 1112 can cooperate with the drum assembly, making it easier to install the drum assembly inside the drum assembly. The electrode 1212 can be electrically connected to the image forming apparatus, receive the voltage transmitted by the image forming apparatus, and make the developing roller 131 energized to complete the developing operation. In this embodiment, the developing roller 131 includes a roller shaft and a roller body that rotates with the roller shaft. The electrode 1212 is electrically connected to the roller body but not electrically connected to the roller shaft.

[0100] The second end 12 of the developing cartridge is also provided with a collection member 122. The collection member 122 has a second pushing part 1221 and a locking part 1222. The second pushing part 1221 receives the pushing force of the drum assembly together with the first pushing part. The locking part 1222 can be locked by the drum assembly when the developing cartridge is installed in the drum assembly, so that the developing cartridge will not move relative to the drum assembly.

[0101] The second end 12 also has a powder filling port 123, which is used to fill the cartridge 10 with developer. To prevent leakage of the developer inside, the powder filling port 123 is sealed with a cap.

[0102] like Figure 4 As shown, the cartridge 10 has a powder supply chamber 101 and a powder replenishment chamber 104. The powder replenishment chamber 104 is separated from the powder supply chamber 101 by a baffle plate 102, and a powder replenishment port 103 is provided between the baffle plate 102 and the cartridge 10. In this embodiment, the powder supply chamber 101 has a light detection hole 161 at its bottom in the third direction Z (i.e., near the sixth end 16 of the cartridge 10). The light detection hole 161 is used to detect the remaining amount of developer in the powder supply chamber 101. When the image forming apparatus detects through the light detection hole 161 that the developer capacity in the powder supply chamber 101 has decreased to a predetermined value, the image forming apparatus controls the drive assembly to drive the developing cartridge, supplying the developer in the powder replenishment chamber 104 to the powder supply chamber 101 through the powder replenishment port 103.

[0103] In this embodiment, the powder supply chamber 101 and the powder replenishment chamber 104 are integrally formed. In other embodiments, the powder replenishment chamber 104 and the powder supply chamber 101 are separately set. When all the developer in the powder replenishment chamber 104 is supplied to the powder supply chamber 101, the powder replenishment chamber 104 can be replaced. Therefore, there is no need to replace the developing cartridge, thereby saving the cost of using the developing cartridge.

[0104] The housing 10 also includes a first stirring frame 133 and a second stirring frame 134. The first stirring frame 133 is disposed in the powder feeding chamber 101 and rotates to transport the developer in the powder feeding chamber 101 to the powder feeding roller 132, thereby achieving the purpose of supplying powder to the developing roller 131. The second stirring frame 134 is disposed in the powder replenishment chamber 104 and rotates to allow the developer in the powder replenishment chamber 104 to enter the powder feeding chamber 101 through the powder replenishment port 103.

[0105] Regarding the structure of the transmission assembly, this application provides the following various embodiments.

[0106] Example 1

[0107] In this embodiment, as Figure 6 and Figure 7 As shown, the transmission assembly includes multiple gear sets. The first gear set includes: a first transmission gear 401, a first ratchet 402, and a first driven gear 403; the second gear set includes: a second transmission gear 411, a second ratchet 412, and a second driven gear 413; and the third gear set includes: a third transmission gear 421, a third ratchet 422, and a third driven gear 423.

[0108] The transmission assembly further includes a first stirring gear 43 and a second stirring gear 44, which are respectively connected to the first stirring frame 133 and the second stirring frame 134 to drive the first stirring frame 133 and the second stirring frame 134 to rotate. The transmission assembly also includes a developing gear 45 and a powder feeding gear 46, which are respectively fixedly mounted at one end of the developing roller 131 and the powder feeding roller 132 in the first direction X, to drive the developing roller 131 and the powder feeding roller 132 to rotate. In addition, the transmission assembly includes multiple idler gears, namely a first idler gear 471, a second idler gear 472, a third idler gear 473, and a fourth idler gear 474. The first idler gear 471 and the second idler gear 472 are used to transmit driving force from the first stirring gear 43 to the developing gear 45 and the powder feeding gear 46, and the third idler gear 473 and the fourth idler gear 474 are used to transmit driving force from the third driven gear 423 to the second stirring gear 44.

[0109] The first transmission gear 401 has a power receiving unit 4011 for receiving the driving force output from the image forming apparatus and then transmitting the driving force to the transmission assembly.

[0110] Specifically, the first transmission gear 401 in the first gear set can transmit driving force to the first driven gear 403 through the first ratchet 402. In the first direction X, the first driven gear 403 is closer to the first end 11 of the housing 10 than the first transmission gear 401, and the first ratchet 402 is located between the first transmission gear 401 and the first driven gear 403 in the first direction X.

[0111] like Figure 8 and Figure 9 As shown, the first transmission gear 401 also has a first fixing part 4013 and a first abutting surface 4014, and the first ratchet 402 has a first fixing part 4023 and a first abutting surface 4024. When the first ratchet 402 engages with the first transmission gear 401, the first fixing part 4013 engages with the first fixing part 4023, allowing the first ratchet 402 to rotate clockwise along the D1 direction or counterclockwise along the D2 direction together with the first transmission gear 401. When the first transmission gear 401 drives the first ratchet 402 to rotate counterclockwise along the D2 direction, the first abutting surface 4024 on the first ratchet 402 can abut against the first abutting surface 4014 on the first transmission gear 401, causing the first ratchet 402 to displace in the first direction X, specifically moving along the first direction X towards the first driven gear 403.

[0112] like Figure 10 As shown, the first ratchet 402 also has a first inclined surface 4021 and a first force-bearing surface 4022, and the first driven gear 403 correspondingly has a second inclined surface 4031 and a second force-bearing surface 4032. When the first ratchet 402 rotates forward along the D1 direction with the first transmission gear 401, the first inclined surface 4021 on the first ratchet 402 contacts the second inclined surface 4031 on the first driven gear 403, that is, there is no driving force transmission between the first ratchet 402 and the first driven gear 403, and the first driven gear 403 does not rotate; when the first ratchet 402 rotates in the D2 direction with the first transmission gear 401, the first force-bearing surface 4022 on the first ratchet 402 abuts against the second force-bearing surface 4032 on the first driven gear 403, so that the first driven gear 403 rotates in the D2 direction together with the first ratchet 402. That is, when the first transmission gear 401 rotates forward, there is no driving force transmission between the first driven gear 403 and the first transmission gear 401; when the first transmission gear 401 rotates in reverse, there is a driving force transmission between the first driven gear 403 and the first transmission gear 401, and the first driven gear 403 rotates in reverse as well.

[0113] As is understood, in this application, direction D1 is forward rotation and direction D2 is reverse rotation. Forward rotation is not the same as clockwise rotation, and reverse rotation is not the same as counterclockwise rotation. Forward rotation in direction D1 and reverse rotation in direction D2 are simply rotation directions defined in this application. The rotation directions of D1 and D2 are opposite. For ease of distinction, direction D1 is defined as forward rotation and direction D2 as reverse rotation. In the subsequent description of embodiments, forward rotation and reverse rotation will be used instead of the directions D1 and D2 marked in the drawings.

[0114] In this embodiment, the second and third gear sets are identical to the first gear set, except that the gear size is changed due to adjustments in the transmission ratio required by the operating environment. Specifically, when the first transmission gear 401, second transmission gear 411, and third transmission gear 421 are in forward rotation, they do not transmit driving force to the first driven gear 403, second driven gear 413, and third driven gear 423; driving force is only transmitted in reverse rotation. That is, the arrangement of the inclined surfaces and force-bearing surfaces on all ratchet gears is the same as that on all driven gears, and will not be elaborated further here.

[0115] like Figure 11 and Figure 12 As shown, the power receiving unit 4011 receives the driving force of the image forming apparatus and rotates forward or backward to achieve toner replenishment or toner delivery.

[0116] like Figure 5 , Figure 11 As shown, when there is sufficient developer in the powder supply chamber 101 and the developing cartridge is working normally, the image forming apparatus transmits a driving force along the D1 direction to the first transmission gear 401 through the power receiving unit 4011, causing the first transmission gear 401 to rotate forward. The first transmission gear 401 meshes with the second transmission gear 411, and the second transmission gear 411 rotates in reverse. The reverse rotation of the second transmission gear 411 drives the second driven gear 413 to rotate in reverse through the second ratchet 412. The second driven gear 413 meshes with the first stirring gear 43, driving the first stirring gear 43 to rotate forward, thereby driving the first stirring frame 133 to rotate forward. The first stirring gear 43 also meshes with the first driven gear 403 and the first idler gear 471. The forward rotation of the first stirring gear 43 drives the first driven gear 403 to rotate in reverse. Since the first transmission gear 401 rotates forward, there is no driving force transmission between the first transmission gear 401 and the first driven gear 403. Similarly, there is no power transmission between the reverse rotation of the first driven gear 403 and the first transmission gear 401, so there is no interference. The first stirring gear 43 transmits driving force to the developing gear 45 and the powder feeding gear 46 through the first idler gear 471 and the second idler gear 472, thereby driving the developing gear 45 and the powder feeding gear 46 to rotate and perform developing work.

[0117] The second transmission gear 411 meshes with the third transmission gear 421, and the third driven gear 423 meshes with the third idler gear 473. The third idler gear 473 meshes with the second stirring gear 44 through the fourth idler gear 474. When the second transmission gear 411 rotates in reverse, it drives the third transmission gear 421 to rotate in the forward direction. When the third transmission gear 421 rotates in the forward direction, since there is no driving force transmission between the third ratchet 422 and the third driven gear 423, the third driven gear 423 does not rotate. That is, the third idler gear 473 and the fourth idler gear 474 do not receive driving force, and the second stirring gear 44 does not drive the second stirring frame 134 to rotate and replenish powder.

[0118] Therefore, when the image forming apparatus outputs a forward driving force to the power receiving unit 4011, causing the first transmission gear 401 to rotate forward, the first transmission gear 401 transmits the driving force to the first stirring gear 43, the developing gear 45, and the powder feeding gear 46. This causes the first stirring gear 43, the developing gear 45, and the powder feeding gear 46 to drive the first stirring frame 133, the developing roller 131, and the powder feeding roller 132 to rotate, respectively. The developing cartridge consumes the developer in the powder supply chamber 101 for developing. At the same time, the second stirring gear 44 does not receive a driving force to rotate, so the second stirring frame 134 does not rotate, and the developer in the replenishment chamber 104 does not begin to replenish the powder feeding chamber 101.

[0119] like Figure 4 , Figure 12 As shown, as the developer in the powder supply chamber 101 is consumed, when the image forming apparatus detects through the light detection hole 161 that the remaining developer in the powder supply chamber 101 has reached a predetermined value, it changes the forward driving force output to the power receiving unit 4011 into a reverse driving force, causing the first transmission gear 401 to reverse. At this time, the first ratchet 402 reverses along with the first transmission gear 401, driving the first driven gear 403 to reverse as well. The first driven gear 403 meshes with the first stirring gear 43, driving the first stirring gear 43 to rotate forward, just as it does when the first transmission gear 401 rotates forward. The first idler gear 471, the second idler gear 472, the developing gear 45, and the powder feeding gear 46 meshing with the first stirring gear 43 are also the same as when the first driven gear 401 rotates forward, and will not be described in detail here. The only difference is that the driving force for the first stirring gear 43 is now transmitted by the first driven gear 403 in a reverse rotation. The first stirring gear 43 rotates forward, causing the second driven gear 413 to rotate in reverse. Since the first transmission gear 401 rotates in reverse, it causes the second transmission gear 411 to rotate forward. When the second transmission gear 411 rotates forward, there is no driving force transmission between it and the second driven gear 413. Therefore, the forward rotation of the second transmission gear 411 and the reverse rotation of the second driven gear 413 will not interfere with each other. This is similar to the situation where there is no driving force transmission between the first transmission gear 401 and the first driven gear 403 when the first transmission gear 401 rotates forward. This will not be elaborated further here.

[0120] When the second transmission gear 411 rotates forward, it drives the third transmission gear 421 to rotate in reverse. When the third transmission gear 421 rotates in reverse, there is a driving force transmission between the third ratchet 422 and the third driven gear 423, causing the third driven gear 423 to rotate in reverse as well. The rotating third driven gear 423 drives the third idler gear 473 meshing with it to rotate forward. The third idler gear 473 drives the fourth idler gear 474 meshing with it to rotate in reverse. The fourth idler gear 474 drives the second stirring gear 44 to rotate forward. The second stirring gear 44 drives the second stirring frame 134 to rotate forward, so that the developer in the powder replenishment chamber 104 is replenished into the powder supply chamber 101 through the powder supply port 103.

[0121] Therefore, when the remaining developer in the powder supply chamber 101 is detected by the image forming apparatus through the light detection hole 161 and its amount decreases to a predetermined value, the image forming apparatus outputs a reverse driving force to the power receiving unit 4011, thereby causing both the first stirring gear 43 and the second stirring gear 44 to rotate forward, driving the first stirring frame 133 and the second stirring frame 134 to rotate forward. The forward rotation of the second stirring frame 134 supplies the developer in the powder replenishment chamber 104 to the powder supply chamber 101, and the forward rotation of the first stirring frame 133 ensures the supply of developer required for the normal operation of the developing cartridge. That is, the power receiving unit 4011 receiving the reverse driving force does not affect the normal developing operation of the developing cartridge.

[0122] Furthermore, in this embodiment, a light detection hole 161 is provided in the powder supply chamber 101. The image forming apparatus detects the remaining developer in the powder supply chamber 101 through the light detection hole 161. In other embodiments, a sensor, such as a pressure sensor, can be provided on the first stirring frame 133. When there is a lot of developer in the powder supply chamber 101, the resistance encountered by the first stirring frame 133 when rotating and stirring is large. As the developer in the powder supply chamber 101 decreases, the resistance encountered by the first stirring frame 133 when rotating and stirring will gradually decrease. By providing a sensor on the first stirring frame 133 to monitor the resistance or pressure encountered by the first stirring frame 133 when rotating and stirring, the remaining developer capacity in the powder supply chamber 101 can also be determined, thereby deciding when to replenish the powder.

[0123] Furthermore, in other embodiments, the number of pages printed by chip 32 can also be determined. A page number value is set in chip 32. When the number of pages printed by the image forming apparatus reaches the predetermined value of chip 32, the image forming apparatus determines that the developing cartridge 1 needs to be replenished with toner, and then outputs a reverse driving force.

[0124] Furthermore, in this embodiment, only the light detection hole 161 or sensor is provided in the powder supply chamber 101. In other embodiments, the same monitoring device as that in the powder supply chamber 101 can also be provided in the powder replenishment chamber 104. When the developer in the powder replenishment chamber 104 is completely replenished into the powder supply chamber 101, the light detection hole 161 or sensor provided in the powder replenishment chamber 104 can remind the user that there is no developer in the powder replenishment chamber 104, so that the user can replace the powder replenishment chamber 104 and increase the service life of the developing cartridge.

[0125] Furthermore, in this embodiment, four idler wheels are provided to transmit the driving force to the developing gear 45, the powder feeding gear 46, and the second stirring gear 44. In other embodiments, the number and position of the idler wheels can be changed according to the specific usage environment, as long as the developing cartridge can work normally. No further restrictions are imposed here.

[0126] In this embodiment, by setting multiple transmission gears, ratchet, and driven gears, the forward driving force of the developing cartridge consumes the developer in the powder supply chamber 101 for development, and the reverse driving force causes the powder replenishment chamber 104 to replenish the powder in the powder supply chamber 101 without affecting the forward development operation of the developing cartridge. This greatly increases the developer capacity of the developing cartridge. In this embodiment, the powder replenishment chamber 104 can also be set separately from the cartridge body 10. After all the developer in the powder replenishment chamber 104 is replenished into the powder supply chamber 101, the service life of the developing cartridge can be extended by replacing only the powder replenishment chamber 104, thereby reducing the customer's usage costs.

[0127] Furthermore, since multiple transmission gears, ratchet, and driven gears are fixed to the housing 10 in the second direction Y and the third direction Z, the transmission assembly has a relatively compact structure and occupies less space, resulting in a smaller volume of the developing cartridge and a more stable structure.

[0128] Furthermore, in this embodiment, the diameters of the second driven gear 413 and the second transmission gear 411 are approximately the same (e.g., Figure 6 As shown), the second driven gear 413 meshes with the first stirring gear 43. Since there are many gears in this embodiment, to better explain the transmission sequence, and to avoid confusion, the second transmission gear 411 and the second driven gear 413 are approximately the same size. Figure 11 , Figure 12 When explaining the transmission sequence, the diameter of the second driven gear 413 is deliberately drawn small to distinguish it from the second transmission gear 411. In reality, the diameters of the second transmission gear 411 and the second driven gear 413 are similar, and this will be explained separately.

[0129] Furthermore, in other embodiments, the gear set does not necessarily need to have multiple gears; the gear set can be a single gear, and no further limitations are imposed here.

[0130] Example 2

[0131] like Figure 13 and Figure 14 As shown, compared with Embodiment 1, this embodiment reduces the third ratchet 422, the third driven gear 423, and the fourth idler gear 474. The remaining gears are identical to those in Embodiment 1. Another difference between this embodiment and Embodiment 1 is that in this embodiment, regardless of whether the power receiving unit 4011 receives a forward or reverse driving force, the second stirring frame 134 rotates forward to replenish the powder.

[0132] like Figure 14 and Figure 15As shown, the meshing relationship between the first gear set and the second gear set is exactly the same as in Embodiment 1. The third transmission gear 421 meshes directly with the third idler wheel 473, and the third idler wheel 473 meshes with the second stirring gear 44. The third transmission gear 421 is equivalent to the third gear set.

[0133] When the developing cartridge starts working, the power receiving unit 4011 receives the positive driving force. At this time, the first transmission gear 401 rotates in the forward direction, driving the second transmission gear 411 to rotate in the reverse direction. The second transmission gear 411 drives the second driven gear 413 to rotate in the reverse direction through the second ratchet 412. The second driven gear 413 drives the first stirring gear 43 to rotate in the forward direction. The process is exactly the same as the transmission process of the first transmission gear 401 rotating in the forward direction in Embodiment 1, and will not be described in detail here.

[0134] The second driven gear 413 directly meshes with the third transmission gear 421, driving the third transmission gear 421 to rotate forward. The third transmission gear 421 drives the third idler gear 473 to rotate in reverse. The third idler gear 473 drives the second stirring gear 44 to rotate forward. That is, in this embodiment, when the power receiving unit 4011 receives the positive driving force and rotates forward, both the first stirring gear 43 and the second stirring gear 44 rotate forward. There is no need to wait for the developer in the powder supply chamber 101 to decrease to a predetermined value and be detected by the image forming apparatus before starting to replenish the powder.

[0135] When the developer consumption in the powder supply chamber 101 reaches a certain level, the power receiving unit 4011 receives the reverse driving force output by the image forming apparatus. The first transmission gear 401 reverses, and the first transmission gear 401 drives the first driven gear 403 to reverse through the first ratchet 402. The reverse rotation of the first driven gear 403 drives the first stirring gear 43 to rotate forward, and the first stirring gear 43 drives the second driven gear 413 to rotate backward. The transmission sequence is the same as when the power receiving unit 4011 receives the reverse driving force in Embodiment 1, and will not be described in detail here. The reverse-rotating second driven gear 413 drives the third transmission gear 421 to rotate forward, the third transmission gear 421 drives the third idler gear 473 to rotate backward, and the third idler gear 473 drives the second stirring gear 44 to rotate forward. That is, in this embodiment, when the power receiving unit 4011 receives the reverse driving force and rotates backward, both the first stirring gear 43 and the second stirring gear 44 rotate forward.

[0136] Furthermore, in this embodiment, since both the first stirring gear 43 and the second stirring gear 44 rotate in the forward direction regardless of whether the image forming apparatus outputs a forward or reverse driving force, the toner replenishment chamber 104 continuously replenishes toner into the toner supply chamber 101. The distance between the light detection hole 161 and the sixth end 16 of the housing 10 can be increased, or the sensor value on the first stirring frame 133 can be increased. Even if the predetermined value of developer in the toner supply chamber 101 increases, causing less developer consumption, the reverse toner replenishment will begin. After the developer in the toner replenishment chamber 104 is depleted, a significant amount of developer remains in the toner supply chamber 101. This allows for extended use before the user replaces the toner replenishment chamber 104, providing convenience to the customer.

[0137] Furthermore, in this embodiment, the size of the third idler wheel 473 or the third transmission gear 421 can be reduced, that is, the transmission ratio of the second stirring gear 44 can be reduced, and the rotational speed of the second stirring frame 134 can be reduced. This makes the rotational speed of the second stirring frame 134 less than the rotational speed of the first stirring frame 133. During forward rotation, the toner is replenished slowly, which prolongs the time for the developer in the toner supply chamber 101 to decrease, thus increasing the time for the image forming apparatus to detect that the developer has decreased to a predetermined value. When the image forming apparatus detects that the developer is at the predetermined value and begins to reverse, although the rotational speed of the second stirring frame 134 is less than that of the first stirring frame 133, the remaining toner in the toner replenishment chamber 104 will also be supplied to the toner supply chamber 101 before the toner in the toner supply chamber 101 is used up.

[0138] Compared with Embodiment 1, in this embodiment, by setting two transmission gears, a ratchet, a driven gear, and multiple idler gears, the first stirring frame 133 and the second stirring frame 134 rotate in the forward direction regardless of whether the image forming apparatus receives a forward driving force or a reverse driving force, and the developing cartridge can work normally to replenish toner. This reduces the number of gears and further reduces the manufacturing cost of the developing cartridge.

[0139] Furthermore, in this embodiment, the diameters of the second driven gear 413 and the second transmission gear 411 are approximately the same (e.g., Figure 13 As shown), the second driven gear 413 meshes with the first stirring gear 43, as in Embodiment 1. Figure 14 , Figure 15 When describing the sequence, the diameter of the second driven gear 413 is deliberately drawn smaller to distinguish it from the second transmission gear 411, and this will be described separately.

[0140] Furthermore, in this embodiment, when the image forming apparatus detects that the developer is at a predetermined value, the amount of developer in the developing chamber is less than the amount of developer in the developing chamber when the image forming apparatus detects that the developer is at a predetermined value in Embodiment 1.

[0141] Example 3

[0142] like Figure 16 and Figure 17 As shown, the difference between this embodiment and embodiment two is that this embodiment does not have a first ratchet 402, a first driven gear 403, a second ratchet 412, and a second driven gear 413, and the first transmission gear 401 in this embodiment does not rotate in the opposite direction. Also, the powder supply chamber 101 in this embodiment is different from that in embodiment two.

[0143] like Figure 18 As shown, in this embodiment, the first transmission gear 401 corresponds to the first gear set, the second transmission gear 411 corresponds to the second gear set, and the third transmission gear 421 corresponds to the third gear set. The first transmission gear 401 meshes with the second transmission gear 411, and the second transmission gear 411 meshes with both the first stirring gear 43 and the third transmission gear 421. The first drive gear 43 is connected to the developing gear 45 and the powder feeding gear 46 via the first idler gear 471 and the second idler gear 472. The third transmission gear 421 is connected to the second stirring gear 44 via the third idler gear 473.

[0144] In this embodiment, when the power receiving unit 4011 receives the positive driving force output by the image forming apparatus, the first transmission gear 401 rotates forward, driving the second transmission gear 411 to rotate in the opposite direction. The second transmission gear 411 drives the first stirring gear 43 to rotate forward, and the first stirring gear 43 drives the developing gear 45 and the powder feeding gear 46 to rotate. This driving process is exactly the same as in embodiments one and two, and will not be described in detail here. The reverse-rotating second transmission gear 411 causes the second stirring gear 44 to rotate forward through the third transmission gear 421 and the third idler gear 473, and drives the second stirring frame 134 to rotate forward to replenish powder.

[0145] like Figure 19 As shown, in this embodiment, the powder supply chamber 101 also has a rib 105. The volume between the rib 105 and the baffle plate 102 is reduced, so that the same developer accumulates at a higher height in the light detection hole 161. That is, when the image forming apparatus inputs a positive driving force to the power receiving unit, the first stirring frame 133 and the second stirring frame 134 rotate forward together. The image forming apparatus cannot detect that the developer has reached the predetermined value through the light detection hole 161, so it cannot output a reverse driving force. It rotates forward until the developer in the powder supply chamber 101 and the powder replenishment chamber 104 is used up.

[0146] Furthermore, in this embodiment, as Figure 20 As shown, the light detection hole 161 can also be removed, or the sensor set on the stirring rack can be removed, so that the image forming apparatus cannot obtain the developer in the powder supply chamber 101, that is, the image forming apparatus will never output the driving force for reverse rotation of the developing cartridge.

[0147] Furthermore, in this embodiment, when the developer in the toner supply chamber 101 and the toner replenishment chamber 104 of the developing cartridge 1 is exhausted, the number of pages printed by the developing cartridge 1 also reaches the number of pages preset in the chip 32. The image forming apparatus recognizes the page number stored in the chip and therefore issues an alarm to remind the user to replace the developing cartridge 1. Thus, the lifespan of the developing cartridge 1 will expire before the image forming apparatus outputs the reverse driving force, and the user will replace it with a new developing cartridge.

[0148] Furthermore, in other embodiments, the second stirring gear 44 can directly mesh with the second transmission gear 411 (second gear set), that is, the second stirring gear 44 is equivalent to the third gear set.

[0149] In this embodiment, multiple gears mesh together so that after the first transmission gear 401 receives the positive driving force input from the image forming apparatus, it drives the first stirring gear 43 and the second stirring gear 44 to rotate in the forward direction through multiple gears. By providing a rib 105 in the powder supply chamber 101 or eliminating the light detection hole 161, the image forming apparatus does not output a reverse rotational force to the power receiving part 4011, and continues to rotate in the forward direction to consume the developer. This further reduces the number of gears and lowers the manufacturing cost of the developing cartridge.

[0150] Example 4

[0151] This embodiment provides a new forward output component, the purpose of which is that when the image forming apparatus outputs both forward and reverse rotational forces, the forward output component will output a forward driving force, which serves as the first gear set in Embodiment 1.

[0152] like Figure 21 As shown, the forward output component includes a first input gear 50, a fourth ratchet 51, a drive shaft 52, a first helical gear 53, a second helical gear 54, a holding part 55, a second input gear 56, a fifth ratchet 57, and an output gear 58. The holding part 55 is used to hold the first helical gear 53 and the second helical gear 54. The first input gear 50, the second input gear 56, the first helical gear 54, and the second helical gear 54 are all bevel gears.

[0153] like Figure 22 and Figure 23As shown, the first input gear 50 engages with the fourth ratchet 51, and the second input gear 56 engages with the fifth ratchet 57. The first input gear 50 includes a third inclined surface 501 and a third force-bearing surface 502. The fourth ratchet 51 has a fourth inclined surface 511, a D-shaped hole 513, and a fourth force-bearing surface 512. The engagement of the first input gear 56 and the fourth ratchet 51 is similar to that in Embodiment 1. When the first input gear 50 rotates forward, the third force-bearing surface 502 abuts against the fourth force-bearing surface 512, and the first input gear 50 drives the fourth ratchet 51 to rotate. When the first input gear 50 rotates in reverse, the third inclined surface 501 engages with the fourth inclined surface 511. A slight deformation of the third inclined surface 501 or the fourth inclined surface 511 is enough to allow the fourth inclined surface 511 to pass over the third inclined surface 501, thereby eliminating the transmission of driving force between the first input gear 50 and the fourth ratchet 51. The second input gear 56 and the fifth ratchet 57 are similar to the first input gear 50 and the fourth ratchet 51 in terms of forward and reverse driving. That is, when the second input gear 56 rotates forward, there is a driving force transmission between the second input gear 56 and the fifth ratchet 57. When the second input gear 56 rotates in reverse, there is no driving force transmission between the second input gear 56 and the fifth ratchet 57. This will not be elaborated on further here.

[0154] The fourth ratchet 51, the fifth ratchet 57, and the output gear 58 all have D-shaped holes, which can cooperate with the transmission rod 52 to drive the transmission rod 52 to rotate together.

[0155] like Figure 24 and Figure 25 As shown, when the first input gear 50 receives a positive driving force, it drives the fourth ratchet 51 to rotate together. The first input gear 50 causes the second input gear 56 to rotate in the opposite direction through the first helical gear 53 and the second helical gear 54. That is, there is no driving force transmission between the second input gear 56 and the fifth ratchet 57. The fourth ratchet 51 rotates in the forward direction, which drives the transmission rod 52 to rotate in the forward direction. The transmission rod 52 drives the fifth ratchet 57 and the output gear 58 to rotate in the forward direction. The output gear 58 outputs the driving force for the forward rotation. Since there is no driving force transmission between the second input gear 56 and the fifth ratchet 57, the fifth ratchet 57 rotates in the forward direction along with the transmission rod 52, and does not interfere with the second input gear 56 which rotates in the reverse direction.

[0156] like Figure 26 and Figure 27As shown, when the first input gear 50 receives a reverse driving force, there is no driving force transmission between it and the fourth ratchet 51. The first input gear 50 causes the second input gear 56 to rotate in the forward direction through the first helical gear 53 and the second helical gear 54. The second input gear 56 drives the fifth ratchet 57 to rotate in the forward direction. The forward rotation of the fifth ratchet 57 drives the transmission rod 52 to rotate in the forward direction. The transmission rod 52 drives the fourth ratchet 51 and the output gear 58 to rotate in the forward direction. The output gear 58 outputs the driving force for forward rotation. Since there is no driving force transmission between the first input gear 50 and the fourth ratchet 51, the fourth ratchet 51 rotates in the forward direction along with the transmission rod 52 and does not interfere with the first input gear 50 which rotates in the reverse direction.

[0157] In this embodiment, by setting such a positive output component, it is ensured that the output gear outputs a positive driving force regardless of whether it receives a positive driving force or a reverse driving force. Thus, setting this component on the housing 10 (the specific connection method is not limited here) simplifies the structure of the housing 10 and saves installation steps.

[0158] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A developing cartridge, detachably installed within an image forming apparatus, the image forming apparatus being capable of outputting a forward driving force and a reverse driving force, characterized in that, The developing cartridge includes: A cartridge for containing developer, the cartridge having opposing first and second ends in a first direction, opposing third and fourth ends in a second direction, and opposing fifth and sixth ends in a third direction, the cartridge including a powder supply chamber and a powder replenishment chamber; A developing roller is disposed at the third end, and the developing roller is rotatable about an axis extending along the first direction; The first stirring rack is disposed inside the powder supply chamber; The second stirring rack is disposed in the powder replenishment chamber and is used to replenish the developer in the powder replenishment chamber to the powder supply chamber. A transmission assembly is disposed at the first end. The transmission assembly includes gear sets, namely: a first gear set, a second gear set, and a third gear set. The transmission assembly also includes a first stirring gear and a second stirring gear. The first stirring gear is connected to the first stirring frame, and the second stirring gear is connected to the second stirring frame. When the first gear set receives the positive driving force output by the image forming apparatus, the first gear set can drive the first stirring gear to rotate forward through the second gear set; when the first gear set receives the negative driving force output by the image forming apparatus, the first gear set can drive the first stirring gear to rotate forward, and the third gear set drives the second stirring gear to rotate forward.

2. The developing cartridge according to claim 1, characterized in that, The gear set includes a drive gear, a ratchet, and a driven gear. The ratchet is located between the drive gear and the driven gear. The ratchet can rotate with the rotation of the drive gear. The driven gear does not transmit power to the ratchet in either the forward or reverse rotation direction. The driven gear does not transmit power when its rotation direction is opposite to that of the drive gear. The first gear set includes: a first transmission gear, a first ratchet, and a first driven gear. When the first transmission gear rotates forward, there is no driving force transmission between the first transmission gear and the first driven gear. When the first transmission gear rotates in reverse, the first transmission gear drives the first driven gear to rotate in reverse. The second gear set includes: a second transmission gear, a second ratchet, and a second driven gear. When the second transmission gear rotates forward, there is no driving force transmission between the second transmission gear and the second driven gear. When the second transmission gear rotates in reverse, the second transmission gear drives the second driven gear to rotate in reverse. The first transmission gear is provided with a power receiving unit, which can receive the positive driving force and the reverse driving force output by the image forming device. The first driven gear and the second driven gear mesh with the first stirring gear, and the second transmission gear meshes with the first transmission gear.

3. The developing cartridge according to claim 2, characterized in that, The third gear set includes: a third transmission gear, a third ratchet, and a third driven gear. When the third transmission gear rotates forward, there is no driving force transmission between the third transmission gear and the third driven gear. When the third transmission gear rotates in reverse, the third transmission gear drives the third driven gear to rotate in reverse. The third transmission gear meshes with the second transmission gear, and the third driven gear is directly or through an even number of idler gears connected to the second stirring gear. When the first transmission gear rotates forward, the third gear set does not transmit driving force to the second stirring gear; when the first transmission gear rotates in reverse, the third driven gear drives the second stirring gear to rotate forward.

4. A developing cartridge according to claim 3, characterized in that, When the first drive gear reverses, the third driven gear drives the second stirring gear to rotate forward, either directly or through the two idler gears.

5. The developing cartridge according to claim 2, characterized in that, The third gear set includes a third transmission gear, which is connected to the second stirring gear via an odd number of idler gears, so that when the first transmission gear rotates forward or reverse, the third transmission gear drives the second stirring gear to rotate forward.

6. The developing cartridge according to claim 5, characterized in that, When the first transmission gear rotates forward or reverse, the third transmission gear drives the second stirring gear to rotate forward through an idler wheel.

7. The developing cartridge according to claim 1, characterized in that, The first gear set includes a first transmission gear, the second gear set includes a second transmission gear, and the third gear set includes a third transmission gear. The first transmission gear meshes with the second transmission gear, and the second transmission gear is connected to the first stirring gear and the second stirring gear in a transmission connection. The first transmission gear is provided with a power receiving unit, which can receive the positive driving force output by the image forming apparatus to drive the first stirring gear and the second stirring gear to rotate forward; The developing chamber also includes a developing gear, and the first stirring gear is connected to the developing gear through multiple idler gears to drive the developing gear to rotate.

8. The developing cartridge according to claim 7, characterized in that, The second transmission gear meshes directly with the first stirring gear; The second transmission gear is connected to the second stirring gear via the third transmission gear and an odd number of idler gears, or the second transmission gear directly meshes with the second stirring gear; The first stirring gear meshes with the developing gear via two idler gears.

9. The developing cartridge according to claim 8, characterized in that, The powder supply chamber has a rib near the third end, and the rib protrudes into the powder supply chamber in a third direction.

10. The developing cartridge according to any one of claims 1-6, characterized in that, The powder supply chamber is provided with a light detection hole near the second end, and the light detection hole is located on the third side upwards near the sixth end; The optical detection aperture is used to detect the remaining amount of developer in the powder supply chamber. When the optical detection aperture detects that the developer capacity has decreased to a predetermined value, the image forming apparatus changes from outputting a positive driving force to outputting a reverse driving force.

Images