Developing box

Abstract

The invention 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 the Chinese patent application No. 202410431883.5, filed on April 10, 2024, and entitled "Developing cartridge", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of electronic imaging, in particular to a developing cartridge. BACKGROUND

[0003] The developing cartridge is mounted on a drum assembly and can be detachably installed into an image forming device together with the drum assembly. The developing cartridge stores a developer therein, and has a developing roller and a powder feeding roller. The powder feeding roller is capable of feeding the developer stored in the developing cartridge to the developing roller. The developing roller supplies the developer to a photosensitive drum of the drum assembly. The developing cartridge is provided with a first bin and a second bin, and a first stirring frame and a second stirring frame. The first stirring frame is arranged in the first bin. The image forming device outputs a forward driving force to make the first stirring frame rotate in a forward direction, so as to provide the developing roller and the powder feeding roller with the developer in the first bin, and the developing cartridge develops normally. The second stirring frame is arranged in the second bin. When the developer in the first bin is consumed to a certain value, the image forming device outputs a reverse driving force to make the second stirring frame rotate, so as to supplement the developer in the second bin into the first bin. An end portion of the first stirring frame is provided with a first stirring gear, and an end portion of the second stirring frame is provided with a second stirring gear.

[0004] In the prior art, an end portion of the developing cartridge is provided with a moving gear. The moving gear is capable of moving relative to a cartridge body of the developing cartridge. When the image forming device outputs the forward driving force, the moving gear moves to a position capable of driving the first stirring gear, and drives the first stirring frame to rotate in the forward direction. When the image forming device outputs the reverse driving force, the moving gear moves to a position capable of driving the second stirring gear, and drives the second stirring frame to rotate in the reverse direction. Since the moving gear needs to move relative to the cartridge body, the moving gear occupies a large space, so that the volume of the developing cartridge is large. SUMMARY

[0005] The present application provides a developing cartridge, which is used to solve the problem that the structure for driving the first stirring frame and the second stirring frame occupies a large space, so that the volume of the developing cartridge is large.

[0006] The developing cartridge provided by the embodiments of the present application can be detachably installed in an image forming device. The image forming device is capable of outputting a forward driving force and a reverse driving force. The developing cartridge comprises:

[0007] A cartridge body for accommodating a developer. The cartridge body has opposite first and second ends in a first direction, opposite third and fourth ends in a second direction, and opposite fifth and sixth ends in a third direction. The cartridge body comprises a powder supply cavity and a powder supplement cavity.

[0008] a developing roller disposed at the third end, the developing roller being rotatable about an axis extending in the first direction;

[0009] a first stirring frame disposed in the powder supply cavity;

[0010] a second stirring frame disposed in the powder supplement cavity, for supplementing the developer in the powder supplement cavity to the powder supply cavity;

[0011] a transmission assembly disposed at the first end, the transmission assembly comprising gear sets, respectively, a first gear set, a second gear set, and a third gear set, the transmission assembly further comprising a first stirring gear and a second stirring gear, the first stirring gear being connected to the first stirring frame, and the second stirring gear being connected to the second stirring frame;

[0012] when the first gear set receives a forward driving force output by the image forming device, the first gear set is capable of driving the first stirring gear to rotate forwardly via the second gear set, and when the first gear set receives a reverse driving force output by the image forming device, the first gear set is capable of driving the first stirring gear to rotate forwardly, and the third gear set drives the second stirring gear to rotate forwardly.

[0013] In a possible design, the gear set comprises a transmission gear, a ratchet gear, and a driven gear, the ratchet gear being located between the transmission gear and the driven gear, the ratchet gear being rotatable along with the transmission gear, the driven gear having no power transmission with the ratchet gear in one of a forward rotation direction and a reverse rotation direction, and the driven gear having no power transmission when the driven gear rotates in a direction opposite to the transmission gear;

[0014] the first gear set comprises a first transmission gear, a first ratchet gear, and a first driven gear, when the first transmission gear rotates forwardly, the first transmission gear has no driving force transmission with the first driven gear, and when the first transmission gear rotates reversely, the first transmission gear drives the first driven gear to rotate reversely;

[0015] the second gear set comprises a second transmission gear, a second ratchet gear, and a second driven gear, when the second transmission gear rotates forwardly, the second transmission gear has no driving force transmission with the second driven gear, and when the second transmission gear rotates reversely, the second transmission gear drives the second driven gear to rotate reversely;

[0016] The first transmission gear is provided with a power receiving part, which can receive the forward driving force and the reverse driving force output by the image forming device, the first driven gear and the second driven gear are engaged with the first stirring gear, the second transmission gear is engaged with the first transmission gear, and the second driven gear is engaged 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 reverses, the first driven gear drives the first stirring gear to rotate forward.

[0017] In a possible design, the third gear set comprises a third transmission gear, a third ratchet gear and a third driven gear, when the third transmission gear rotates forward, no driving force is transmitted between the third transmission gear and the third driven gear; when the third transmission gear reverses, the third transmission gear drives the third driven gear to reverse.

[0018] The third transmission gear is engaged with the second transmission gear, and the third driven gear is directly or through even-numbered idlers in driving connection with 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 reverses, the third driven gear drives the second stirring gear to rotate forward.

[0019] In a possible design, when the first transmission gear reverses, the third driven gear directly or through two idlers drives the second stirring gear to rotate forward.

[0020] In a possible design, the third gear set comprises a third transmission gear, the third transmission gear is in driving connection with the second stirring gear through odd-numbered idlers, so that when the first transmission gear rotates forward or reverses, the third transmission gear drives the second stirring gear to rotate forward.

[0021] In a possible design, when the first transmission gear rotates forward or reverses, the third transmission gear drives the second stirring gear to rotate forward through one idler.

[0022] In a possible design, the first gear set comprises a first transmission gear, the second gear set comprises a second transmission gear, and the third gear set comprises a third transmission gear, the first transmission gear is engaged with the second transmission gear, and the second transmission gear is in driving connection with the first stirring gear and the second stirring gear.

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

[0024] The developing cartridge further comprises a developing gear, the first stirring gear is in transmission connection with the developing gear through a plurality of idlers, and the developing gear is driven to rotate.

[0025] In a possible design, the second transmission gear is directly in meshing connection with the first stirring gear;

[0026] The second transmission gear is in meshing connection with the second stirring gear through the third transmission gear and an odd number of idlers, and the first stirring gear is in meshing connection with the developing gear through two idlers.

[0027] In a possible design, the powder supply cavity is provided with a rib portion close to the third end, and the rib portion protrudes into the powder supply cavity along the third direction.

[0028] In a possible design, the powder supply cavity is provided with a light detection hole close to the second end, and the light detection hole is close to the sixth end along the third direction.

[0029] The light detection hole is used for detecting the remaining amount of the developer in the powder supply cavity, and when the light detection hole detects that the developer capacity is reduced to a certain value, the image forming apparatus is changed from outputting a forward driving force to outputting a reverse driving force.

[0030] In the present application, since the transmission assembly is fixed to the cartridge body in the second direction and the third direction, the structure of the transmission assembly is relatively compact, the transmission assembly occupies a smaller space, and the volume of the developing cartridge is relatively small. Meanwhile, since the transmission assembly is not movable relative to the cartridge body in the second direction and the third direction, the structure of the transmission assembly is more stable.

[0031] It should be understood that the foregoing general description and the following detailed description are only exemplary and are not limiting to the present application. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 Structure schematic diagram of the developing cartridge provided in the present application in a specific embodiment;

[0033] Figure 2 Structure schematic diagram of the first end of the developing cartridge in the present application; Figure 1 Structure schematic diagram of the second end of the developing cartridge in the present application;

[0034] Figure 3 Structure schematic diagram of the second end of the developing cartridge in the present application; Figure 1 Structure schematic diagram of the second end of the developing cartridge in the present application;

[0035] Figure 4 Cross-sectional view of the developing cartridge in Embodiment One, wherein the developing cartridge receives a forward driving force output by the image forming apparatus;

[0036] Figure 5A sectional view of the developing cartridge of Example 1, wherein the developing cartridge receives a reverse driving force output from the image forming apparatus;

[0037] Figure 6 A structural view of the first end of the developing cartridge of Example 1 with the first cover removed;

[0038] Figure 7 A partial exploded view of the developing cartridge of Example 1;

[0039] Figure 8 A structural view of the first transmission gear of Example 1; Figure 7

[0040] A structural view of the first ratchet gear of Example 1; Figure 9 Figure 7 A structural view of the first ratchet gear and the first driven gear of Example 1;

[0041] Figure 10 Figure 7 A structural view of the transmission assembly rotating when the image forming apparatus outputs a forward driving force in Example 1;

[0042] Figure 11 A structural view of the transmission assembly rotating when the image forming apparatus outputs a reverse driving force in Example 1;

[0043] Figure 12 A partial exploded view of the developing cartridge of Example 2;

[0044] Figure 13 A structural view of the transmission assembly rotating when the image forming apparatus outputs a forward driving force in Example 2;

[0045] Figure 14 A structural view of the transmission assembly rotating when the image forming apparatus outputs a reverse driving force in Example 2;

[0046] Figure 15 A structural view of the first end of the developing cartridge of Example 3 with the first cover removed;

[0047] Figure 16 A partial exploded view of the developing cartridge of Example 3;

[0048] Figure 17 A structural view of the transmission assembly rotating when the image forming apparatus outputs a driving force in Example 3;

[0049] Figure 18 A sectional view of the developing cartridge of Example 3;

[0050] Figure 19 A sectional view of the developing cartridge of Example 3;

[0051] Figure 20 ​​A sectional view of the developing cartridge of another structure in Example 3;

[0052] Figure 21 An exploded view of the positive output member in Example 4;

[0053] Figure 22 A sectional view of Figure 21 A structural schematic view of the first input gear and the fourth ratchet in Example 5;

[0054] Figure 23 A sectional view of Figure 21 A structural schematic view of the second input gear and the fifth ratchet in Example 6;

[0055] Figure 24 A sectional view of Figure 21 A structural schematic view of the positive output member rotating when receiving a positive driving force in Example 7;

[0056] Figure 25 A sectional view of Figure 24 A sectional view of

[0057] Figure 26 A sectional view of Figure 21 A structural schematic view of the positive output member rotating when receiving a negative driving force in Example 8;

[0058] Figure 27 A sectional view of Figure 26 A sectional view of

[0059] Reference numerals:

[0060] 10 - cartridge body

[0061] 101 - powder supply chamber; 102 - barrier; 103 - powder supplement port; 104 - powder supplement chamber; 105 - rib portion

[0062] 11 - first end

[0063] 111 - first cover; 1112 - first guide portion

[0064] 12 - second end

[0065] 121 - bearing; 1211 - second guide portion; 1212 - electrode; 122 - collection member; 1221 - second urging portion; 1222 - locking portion; 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 - light detection hole;

[0072] 401 - first transmission gear; 4011 - power receiving portion; 4013 - first fixed portion; 4014 - first abutted surface;

[0073] 402 - first ratchet wheel; 4021 - first inclined surface; 4022 - first force receiving surface; 4023 - first fixed portion; 4024 - first abutted surface;

[0074] 403 - first driven gear; 4031 - second inclined surface; 4032 - second force receiving surface;

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

[0076] 421 - third transmission gear; 422 - third ratchet wheel; 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 surface; 502 - third force receiving surface;

[0083] 51 - fourth ratchet wheel; 511 - fourth inclined surface; 512 - fourth force receiving surface; 513 - D-shaped hole;

[0084] 52 - transmission shaft; 53 - first rotational gear; 54 - second rotational gear; 55 - retaining portion; 56 - second input gear; 57 - fifth ratchet wheel; 58 - output gear.

[0085] The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate embodiments consistent with the application and serve to explain the principles of the application. DETAILED DESCRIPTION

[0086] In order to better understand the technical solutions of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0087] It should be noted that the described embodiments are merely some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0088] The terms used in the embodiments of the present application are merely for the purpose of describing particular embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are intended to include plural forms, unless the context clearly indicates otherwise.

[0089] It should be understood that the term "and / or" used herein is merely to describe an association relationship of associated objects, and can represent three relationships, for example, A and / or B can represent three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0090] It should be noted that the "up", "down", "left", "right" and the like described in the embodiments of the present application are described from the angle shown in the drawings, and should not be understood as a limitation on the embodiments of the present application. In addition, in the context, it should also be understood that when referring to an element connected to another element "on" or "under", it can be directly connected to another element "on" or "under", or indirectly connected to another element "on" or "under" through an intermediate element.

[0091] The embodiments of the present application provide a developing cartridge, which can accommodate a developer and can be installed in a drum assembly to be installed in an image forming device together with the drum assembly for developing.

[0092] As shown in Figure 1 The illustrated left-right direction is a first direction X, the illustrated front-rear direction is a second direction Y, and the illustrated up-down direction is a third direction Z. The developing cartridge has a cartridge body 10, which is oppositely provided with a first end 11 and a second end 12 in the first direction X, oppositely provided with a third end 13 and a fourth end 14 in the second direction Y, and oppositely provided with a fifth end 15 and a sixth end 16 in the third direction Z.

[0093] The developing cartridge comprises 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 installed between the first end 11 and the second end 12. The rotation axes of the developing roller 131, the powder feeding roller 132 and the stirring frame all extend along the first direction X. The powder feeding roller 132 is arranged next to the developing roller 131, and the developing roller 131 is closer to the third end 13 of the cartridge 10 than the powder feeding roller 132 in the second direction Y. The powder feeding roller 132 can feed the developing agent to the developing roller 131. The stirring frame is used to stir the developing agent in the containing cavity, prevent the developing agent from caking and provide sufficient developing agent for the powder feeding roller 132, so that the powder feeding roller 132 can normally feed powder to the developing roller 131.

[0095] As shown in Figure 2 The recognition assembly includes a chip holder 31 and a chip 32 arranged on the chip holder 31. The chip holder 31 is arranged on the first end 11 of the developing cartridge, and the chip 32 is arranged at the end of the chip holder 31 in the third direction Z. The chip 32 can cooperate with the electrical terminal on the image forming device and transmit the information of the developing cartridge. The chip 32 is used to store the relevant information of the developing cartridge, such as the age, storage information, consumable capacity, printable page number and the like of the developing cartridge, and transmit the relevant information of the developing cartridge to the image forming device when the developing cartridge and the drum assembly are installed in the image forming device. The chip 32 includes a storage medium specially storing the information of the developing cartridge and a point contact surface electrically connected with the image forming device. The storage medium and the point contact surface can be integrally formed or separately formed, both of which belong to the chip 32.

[0096] The first end 11 of the developing cartridge has a first cover 111 covering at least part of the transmission assembly to protect the transmission assembly. 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 in the drum assembly, the first guide portion 1112 can cooperate with the guide rail on the drum assembly.

[0097] The first cover 111 is provided with the chip holder 31. In this embodiment, the chip holder 31 is separately arranged with the first cover 111, 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 not move together relative to the developing cartridge. Or in other embodiments, the chip holder 31 is separately arranged with the cartridge 10, but the chip holder 32 is fixedly arranged on the cartridge 10 by screws, buckles or the like.

[0098] The developing cartridge is further provided with a first pushing portion (not shown in the figure) at the first end 11. The first pushing portion is used to receive the pushing force when cooperating with the drum assembly, so that the developing cartridge completes the developing work.

[0099] AsFigure 3 As shown, the second end 12 of the cartridge body 10 is further provided with a bearing 121, which has a second guide portion 1211 and an electrode 1212. The bearing 121 is used to secure 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 and the bearing 121 are integrally formed. The second guide portion 1211 and the first guide portion 1112 can cooperate with the drum assembly, making the drum assembly more convenient to install within the drum assembly. The electrode 1212 can be electrically connected to the image forming device, receiving the voltage transmitted by the image forming device, and charging the developing roller 131 to complete the development process. 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 and is not electrically connected to the roller shaft.

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

[0101] The second end 12 is further provided with a powder filling port 123 for filling developer into the box body 10. In order to prevent the developer inside from leaking, the powder filling port 123 is provided with a protective cover for sealing.

[0102] like Figure 4 As shown, the cartridge body 10 includes 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 blocking plate 102. A powder replenishment port 103 is provided between the blocking plate 102 and the cartridge body 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 body 10). Light detection hole 161 is used to detect the remaining developer in the powder supply chamber 101. When the image forming device detects, through light detection hole 161, that the developer volume in the powder supply chamber 101 has decreased to a predetermined value, the image forming device controls the drive assembly to drive the developer 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 replenishing chamber 104 are integrally formed. In other embodiments, the powder replenishing chamber 104 and the powder supply chamber 101 are separately arranged. When all the developer in the powder replenishing chamber 104 is supplied to the powder delivery chamber 101, the powder replenishing chamber 104 can be replaced. Therefore, there is no need to replace the developing box, thereby saving the use cost of the developing box.

[0104] The cartridge 10 further comprises a first stirring frame 133 and a second stirring frame 134, the first stirring frame 133 is arranged in the powder feeding cavity 101, and the first stirring frame 133 rotates to feed the developer in the powder feeding cavity 101 to the powder feeding roller 132, so as to achieve the purpose of powder supply for the developing roller 131; the second stirring frame 134 is arranged in the powder supplementing cavity 104, and the rotation of the second stirring frame 134 enables the developer in the powder supplementing cavity 104 to enter the powder feeding cavity 101 through the powder supplementing opening 103.

[0105] Regarding the structure of the transmission assembly, the present application provides the following multiple embodiments.

[0106] Embodiment one

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

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

[0109] The first driving gear 401 is provided with a power receiving portion 4011, which is used to receive driving force output from an image forming device, and then transmit the driving force to the transmission assembly.

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

[0111] As shown in Figure 8 and Figure 9 The first transmission gear 401 also has a first fixed portion 4013 and a first abutment surface 4014, and the first ratchet wheel 402 has a first fixed portion 4023 and a first abutment surface 4024. When the first ratchet wheel 402 cooperates with the first transmission gear 401, the first fixed portion 4013 cooperates with the first fixed portion 4023, so that the first ratchet wheel 402 can rotate together with the first transmission gear 401 in the D1 direction or reverse rotation in the D2 direction. When the first transmission gear 401 drives the first ratchet wheel 402 to rotate together in the D2 direction, the first abutment surface 4024 on the first ratchet wheel 402 can abut against the first abutment surface 4014 on the first transmission gear 401, so that the first ratchet wheel 402 generates displacement in the first direction X, specifically moving in the first direction X to the first driven gear 403.

[0112] As shown in Figure 10 The first ratchet wheel 402 also has a first inclined surface 4021 and a first force receiving surface 4022, and the first driven gear 403 correspondingly has a second inclined surface 4031 and a second force receiving surface 4032. When the first ratchet wheel 402 rotates together with the first transmission gear 401 in the D1 direction, the first inclined surface 4021 on the first ratchet wheel 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 wheel 402 and the first driven gear 403, and the first driven gear 403 does not rotate; when the first ratchet wheel 402 reverses together with the first transmission gear 401 in the D2 direction, the first force receiving surface 4022 on the first ratchet wheel 402 abuts against the second force receiving surface 4032 on the first driven gear 403, so that the first driven gear 403 reverses together with the first ratchet wheel 402 in the D2 direction. 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 reverses, there is driving force transmission between the first driven gear 403 and the first transmission gear 401, and the first driven gear 403 reverses together.

[0113] It can be understood that in the present application, the D1 direction is forward rotation, and the D2 direction is reverse rotation. The forward rotation is not clockwise rotation, and the reverse rotation is not counterclockwise rotation. The D1 rotation direction and the D2 rotation direction are opposite. In order to distinguish, the D1 direction is set as forward rotation, and the D2 direction is set as reverse rotation. For the subsequent embodiment description, forward rotation and reverse rotation are used instead of the D1 direction and the D2 direction marked in the drawings.

[0114] In the present embodiment, the second gear set and the third gear set are completely identical to the first gear set except that the gear size is changed due to the need for adjusting the transmission ratio in the use environment, that is, when the first transmission gear 401, the second transmission gear 411 and the third transmission gear 421 are in normal transmission, none of them transmits driving force to the first driven gear 403, the second driven gear 413 and the third driven gear 423, and driving force is only transmitted when they are reversed. That is, the arrangement of the inclined surface and the force receiving surface on all the ratchets is identical to the arrangement of the inclined surface and the force receiving surface on all the driven gears, and no further description is given here.

[0115] As shown in Figs. 1 and 2, the power receiving part 4011 receives driving force of the image forming apparatus to rotate or reverse, and realizes powder supplement or powder feeding. Figure 11 Figure 12 As shown in Figs. 1 and 2, when the developer in the powder supply cavity 101 is sufficient and the developing cartridge is working normally, the image forming apparatus transmits driving force in the D1 direction to the first transmission gear 401 through the power receiving part 4011 to rotate the first transmission gear 401, the first transmission gear 401 meshes with the second transmission gear 411, the second transmission gear 411 is reversed, the second transmission gear 411 is reversed to drive the second driven gear 413 to reverse through the second ratchet 412, the second driven gear 413 meshes with the first stirring gear 43 to drive the first stirring gear 43 to rotate, and further drive the first stirring frame 133 to rotate; the first stirring gear 43 also meshes with the first driven gear 403 and the first idler gear 471, the first stirring gear 43 drives the first driven gear 403 to reverse, and since the first transmission gear 401 rotates, no driving force is transmitted between the first transmission gear 401 and the first driven gear 403, and no driving force is transmitted between 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, and further drives the developing gear 45 and the powder feeding gear 46 to rotate to perform developing work.

[0116] As shown in Figs. 1 and 2, when the developer in the powder supply cavity 101 is sufficient and the developing cartridge is working normally, the image forming apparatus transmits driving force in the D1 direction to the first transmission gear 401 through the power receiving part 4011 to rotate the first transmission gear 401, the first transmission gear 401 meshes with the second transmission gear 411, the second transmission gear 411 is reversed, the second transmission gear 411 is reversed to drive the second driven gear 413 to reverse through the second ratchet 412, the second driven gear 413 meshes with the first stirring gear 43 to drive the first stirring gear 43 to rotate, and further drive the first stirring frame 133 to rotate; the first stirring gear 43 also meshes with the first driven gear 403 and the first idler gear 471, the first stirring gear 43 drives the first driven gear 403 to reverse, and since the first transmission gear 401 rotates, no driving force is transmitted between the first transmission gear 401 and the first driven gear 403, and no driving force is transmitted between 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, and further drives the developing gear 45 and the powder feeding gear 46 to rotate to perform developing work. Figure 5 Figure 11 As shown in Figs. 1 and 2, when the developer in the powder supply cavity 101 is sufficient and the developing cartridge is working normally, the image forming apparatus transmits driving force in the D1 direction to the first transmission gear 401 through the power receiving part 4011 to rotate the first transmission gear 401, the first transmission gear 401 meshes with the second transmission gear 411, the second transmission gear 411 is reversed, the second transmission gear 411 is reversed to drive the second driven gear 413 to reverse through the second ratchet 412, the second driven gear 413 meshes with the first stirring gear 43 to drive the first stirring gear 43 to rotate, and further drive the first stirring frame 133 to rotate; the first stirring gear 43 also meshes with the first driven gear 403 and the first idler gear 471, the first stirring gear 43 drives the first driven gear 403 to reverse, and since the first transmission gear 401 rotates, no driving force is transmitted between the first transmission gear 401 and the first driven gear 403, and no driving force is transmitted between 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, and further drives the developing gear 45 and the powder feeding gear 46 to rotate to perform developing work.

[0117] The second transmission gear 411 meshes with the third transmission gear 421, the third driven gear 423 meshes with the third idler gear 473, and the third idler gear 473 meshes with the second stirring gear 44 through the fourth idler gear 474. The second transmission gear 411 is reversed to drive the third transmission gear 421 to rotate, and when the third transmission gear 421 rotates, no driving force is transmitted between the third ratchet 422 and the third driven gear 423, so 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 to supplement powder.

[0118] ​​Therefore, when the image forming apparatus outputs a forward driving force to the power receiving portion 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, causing the first stirring gear 43, the developing gear 45, and the powder feeding gear 46 to respectively drive the first stirring frame 133, the developing roller 131, and the powder feeding roller 132 to rotate, and the developing cartridge consumes the developer in the powder supply chamber 101 to perform the developing operation. At the same time, the second stirring gear 44 does not receive the driving force to rotate, so the second stirring frame 134 does not rotate, and the developer in the powder replenishment chamber 104 does not begin to be replenished to the powder feeding chamber 101.

[0119] like Figure 4 、 Figure 12 As shown, as the developer in the powder supply chamber 101 is consumed, the image forming device detects through the light detection hole 161 that the remaining developer in the powder supply chamber 101 has reached a predetermined value. The forward driving force output to the power receiving portion 4011 is converted 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. The first driven gear 403 engages with the first stirring gear 43, driving the first stirring gear 43 to rotate forward, which is the same as 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 that are engaged with the first stirring gear 43 are 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 first driven gear 403 that transmits the driving force to the first stirring gear 43 is now the reversed first driven gear 403. The forward rotation of the first stirring gear 43 drives the second driven gear 413 to reverse, and since the first transmission gear 401 reverses, it drives the second transmission gear 411 to rotate forward. When the second transmission gear 411 rotates forward, there is no driving force transmitted 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 do not interfere with each other, just like when the first transmission gear 401 rotates forward, there is no driving force transmitted between it and the first driven gear 403. No further details will be given here.

[0120] When the second transmission gear 411 rotates forward, it drives the third transmission gear 421 to rotate reversely. When the third transmission gear 421 rotates reversely, there is a driving force transmission between the third ratchet 422 and the third driven gear 423, so that the third driven gear 423 rotates reversely together. The reversed third driven gear 423 drives the third idler gear 473 engaged with it to rotate forward. The third idler gear 473 drives the fourth idler gear 474 engaged with it to rotate reversely. 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 replenishing chamber 104 is replenished into the powder supply chamber 101 through the powder supply port 103.

[0121] Therefore, when the developer remaining amount in the powder supply chamber 101 is detected by the image forming apparatus to be reduced to a predetermined value through the light detection hole 161, the image forming apparatus outputs a reversed driving force to the power receiving portion 4011, so that the first stirring gear 43 and the second stirring gear 44 are both rotated in the forward direction, the first stirring frame 133 and the second stirring frame 134 are rotated in the forward direction, and the second stirring frame 134 rotates to supply the developer in the powder supplement chamber 104 to the powder supply chamber 101, and the first stirring frame 133 rotates to ensure the supply of the developer required for the normal operation of the developing cartridge, i.e., the power receiving portion 4011 receives the reversed driving force without affecting the normal developing operation of the developing cartridge.

[0122] Further, in the present embodiment, the light detection hole 161 is arranged in the powder supply chamber 101, and the image forming apparatus detects the developer remaining amount in the powder supply chamber 101 through the light detection hole 161. In other embodiments, a sensor such as a pressure sensor can be arranged on the first stirring frame 133. When the developer in the powder supply chamber 101 is relatively more, the resistance to the rotation of the first stirring frame 133 is relatively large, and as the developer in the powder supply chamber 101 is reduced, the resistance to the rotation of the first stirring frame 133 is gradually reduced. By arranging the sensor on the first stirring frame 133 to monitor the resistance or pressure to the rotation of the first stirring frame 133, the developer remaining amount in the powder supply chamber 101 can also be determined, so as to determine when the powder supplement is performed.

[0123] Further, in other embodiments, the number of printed pages of the chip 32 can also be used to determine when the powder supplement is performed. A number of printed pages can be set in the chip 32, and when the number of printed pages of the image forming apparatus reaches the predetermined number of the chip 32, the image forming apparatus determines that the developing cartridge 1 needs to be supplemented with powder, and then outputs the reversed driving force.

[0124] Further, in the present embodiment, the light detection hole 161 or the sensor is arranged only in the powder supply chamber 101. In other embodiments, the same monitoring device as that arranged in the powder supply chamber 101 can also be arranged in the powder supplement chamber 104. When the developer in the powder supplement chamber 104 is completely supplemented to the powder supply chamber 101, the light detection hole 161 or the sensor arranged in the powder supplement chamber 104 can remind the user that there is no developer in the powder supplement chamber 104, so as to replace the powder supplement chamber 104, thereby increasing the service life of the developing cartridge.

[0125] Further, in the present embodiment, four idlers are arranged 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 arrangement of the idlers can be changed according to the specific use environment, as long as the developing cartridge can operate normally, and the specific arrangement is not limited herein.

[0126] In this embodiment, by setting up multiple transmission gears, ratchets and driven gears, the developer box receives a positive driving force to consume the developer in the powder supply chamber 101 for development, and receives a reverse driving force to make the powder replenishing chamber 104 replenish powder for the powder supply chamber 101, which will not affect the forward development work of the developer box, thereby greatly improving the developer holding capacity of the developer box. In this embodiment, the powder replenishing chamber 104 can also be set separately from the box body 10. After the developer in the powder replenishing chamber 104 is completely replenished into the powder supply chamber 101, the service life of the developer box can be extended by replacing only the powder replenishing chamber 104, thereby reducing the customer's usage cost.

[0127] In addition, since multiple transmission gears, ratchets and driven gears are fixed to the box body 10 in the second direction Y and the third direction Z, the structure of the transmission assembly is relatively compact and the space occupied by the transmission assembly as a whole is smaller, which makes the volume of the developing box smaller and the structure of the transmission assembly is more stable.

[0128] In addition, in this embodiment, the diameters of the second driven gear 413 and the second transmission gear 411 are similar (eg Figure 6 As shown), the second driven gear 413 is engaged with the first stirring gear 43. Since there are many gears in this embodiment, in order to better illustrate the transmission sequence, and the second transmission gear 411 and the second driven gear 413 are similar in size to prevent confusion, Figure 11 、 Figure 12 When describing the transmission sequence, the diameter of the second driven gear 413 is intentionally drawn small to distinguish it from the second transmission gear 411. In practice, the second transmission gear 411 and the second driven gear 413 have similar diameters, which are described separately.

[0129] Furthermore, in other embodiments, the gear set does not necessarily need multiple gears, and the gear set can be a single gear, which is not specifically limited here.

[0130] Example 2

[0131] like Figure 13 and Figure 14 As shown, compared with the first embodiment, this embodiment has no third ratchet gear 422, third driven gear 423, and fourth idler gear 474. Other than that, the remaining gears are identical to those of the first embodiment. Another difference between this embodiment and the first embodiment is that in this embodiment, regardless of whether the power receiving portion 4011 receives a forward driving force or a reverse driving force, the second stirring frame 134 rotates in the forward direction to replenish powder.

[0132] like Figure 14 and Figure 15As shown, the meshing relationship of the first gear set and the second gear set is exactly the same as that of the first embodiment. The third transmission gear 421 is directly meshed with the third idler gear 473, which is meshed with the second stirring gear 44. The third transmission gear 421 is equivalent to the third gear set.

[0133] When the developing cartridge starts to work, the power receiving part 4011 receives the forward driving force. At this time, the first transmission gear 401 rotates forward, driving the second transmission gear 411 to rotate reversely. The second transmission gear 411 drives the second driven gear 413 to rotate reversely through the second ratchet wheel 412. The second driven gear 413 drives the first stirring gear 43 to rotate forward. The process is exactly the same as the transmission process when the first transmission gear 401 rotates forward in the first embodiment, and thus will not be described in detail here.

[0134] The second driven gear 413 is directly meshed 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 reversely, and the third idler gear 473 drives the second stirring gear 44 to rotate forward. That is, in this embodiment, when the power receiving part 4011 receives the forward driving force to rotate forward, both the first stirring gear 43 and the second stirring gear 44 rotate forward, and there is no need to wait until the developer in the powder supply cavity 101 is reduced to a certain value and is detected by the image forming apparatus before starting to replenish the powder.

[0135] When the developer in the powder supply cavity 101 is consumed to a certain extent, the power receiving part 4011 receives the reverse driving force output by the image forming apparatus. The first transmission gear 401 rotates reversely, driving the first driven gear 403 to rotate reversely through the first ratchet wheel 402. 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 reversely. The transmission sequence is the same as when the power receiving part 4011 receives the reverse driving force in the first embodiment, and thus will not be described in detail here. The reversely 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 reversely, and the third idler gear 473 drives the second stirring gear 44 to rotate forward. That is, in this embodiment, when the power receiving part 4011 receives the reverse driving force to rotate reversely, both the first stirring gear 43 and the second stirring gear 44 rotate forward.

[0136] Further, in the present embodiment, since the first stirring gear 43 and the second stirring gear 44 rotate in the same direction no matter whether the image forming apparatus outputs a forward driving force or a reverse driving force, the powder supplement cavity 104 is always supplementing powder to the powder supply cavity 101. The light detection hole 161 can be set farther from the sixth end 16 of the cartridge body 10 or the number of sensors arranged on the first stirring frame 133 can be increased, so that the predetermined amount of developer in the powder supply cavity 101 is increased and the developer is consumed less before the powder supplement cavity 104 is reversed. When the developer in the powder supplement cavity 104 is consumed, there is still a large amount of developer in the powder supply cavity 101, so the user can use the developer for a longer time before replacing the powder supplement cavity 104, which provides convenience for the user.

[0137] Further, in the present embodiment, the size of the third idler gear 473 or the third transmission gear 421 can be reduced, i.e., the transmission ratio of the second stirring gear 44 is reduced, so that the rotation speed of the second stirring frame 134 is reduced, which is less than the rotation speed of the first stirring frame 133. Thus, the developer is supplemented slowly in the forward direction, the time for the developer in the powder supply cavity 101 to be reduced is prolonged, and the time for the image forming apparatus to detect that the developer is reduced to the predetermined amount is increased. When the image forming apparatus starts to reverse after detecting that the developer is reduced to the predetermined amount, although the rotation speed of the second stirring frame 134 is less than that of the first stirring frame 133, the developer in the powder supplement cavity 104 is still supplied to the powder supply cavity 101 before the developer in the powder supply cavity 101 is consumed.

[0138] Compared with the first embodiment, in the present embodiment, two transmission gears, a ratchet gear, a driven gear, and multiple idler gears are arranged, so that the first stirring frame 133 and the second stirring frame 134 rotate in the same direction no matter whether the image forming apparatus outputs a forward driving force or a reverse driving force, and the developer cartridge can work normally to supplement powder. The number of gears is reduced, and the manufacturing cost of the developer cartridge is further reduced.

[0139] In addition, in the present embodiment, the second driven gear 413 and the second transmission gear 411 have approximately the same diameter (as shown in FIG. 4B), the second driven gear 413 meshes with the first stirring gear 43, and the first stirring gear 43 meshes with the second transmission gear 411. The same as in the first embodiment, the second driven gear 413 is sequentially described as being smaller in diameter than the second transmission gear 411, which is separately described. Figure 13 Figure 14 Figure 15 In addition, in the present embodiment, the amount of developer in the developer cartridge when the image forming apparatus detects that the developer is reduced to the predetermined amount is less than that in the first embodiment.

[0140] In addition, in the present embodiment, the amount of developer in the developer cartridge when the image forming apparatus detects that the developer is reduced to the predetermined amount is less than that in the first embodiment.

[0141] Embodiment Three ​​

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

[0143] As Figure 18 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 is engaged with the second transmission gear 411, the second transmission gear 411 is engaged with the first stirring gear 43 and the third transmission gear 421, the first driving gear 43 is connected with the developing gear 45 and the powder feeding gear 46 through the first idler gear 471 and the second idler gear 472. The third transmission gear 421 is connected with the second stirring gear 44 through the third idler gear 473.

[0144] In this embodiment, when the power receiving part 4011 receives the forward driving force output by the image forming device, the first transmission gear 401 rotates forward, driving the second transmission gear 411 to rotate reversely, the second transmission gear 411 drives the first stirring gear 43 to rotate forward, the first stirring gear 43 drives the developing gear 45 and the powder feeding gear 46 to rotate, and the driving process is the same as that in embodiment one and two, which will not be described in detail here. The reversely rotating second transmission gear 411 drives 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] As Figure 19 shown, in this embodiment, the powder supply cavity 101 also has a rib part 105, and the volume between the rib part 105 and the blocking plate 102 is reduced, so that the same amount of developer is accumulated to a higher height in the light detection hole 161. When the image forming device inputs forward driving force to the power receiving part, the first stirring frame 133 and the second stirring frame 134 rotate forward together, and the image forming device cannot detect that the developer reaches a predetermined value through the light detection hole 161, so it cannot output reverse driving force, and keeps rotating forward until the developer in the powder supply cavity 101 and the powder replenishment cavity 104 is used up.

[0146] Further, in this embodiment, as Figure 20 shown, the light detection hole 161 can also be removed, or the sensor provided on the stirring frame can be removed, so that the image forming device cannot obtain the developer in the powder supply cavity 101, that is, the image forming device does not output reverse rotating driving force to the developing cartridge all the time.

[0147] Further, in the present embodiment, when the developer in the powder supply chamber 101 and the developer replenishment chamber 104 in the developing cartridge 1 is consumed, the number of printed pages by the developing cartridge 1 also reaches the number of printed pages preset in the chip 32, the image forming apparatus recognizes the number of printed pages stored in the chip, and thus an alarm is given to prompt the user to replace the developing cartridge 1. Therefore, the image forming apparatus outputs the reverse driving force before the developing cartridge 1 reaches the end of its life, and the user replaces the developing cartridge.

[0148] Further, in other embodiments, the second stirring gear 44 can be directly engaged with the second transmission gear 411 (second gear set), i.e., the second stirring gear 44 is equivalent to the third gear set.

[0149] The present embodiment, by engaging a plurality of gears, causes the first transmission gear 401 to rotate in the forward direction after receiving the forward driving force input from the image forming apparatus, and to drive the first stirring gear 43 and the second stirring gear 44 to rotate in the forward direction through a plurality of gears. By further providing the rib 105 in the powder supply chamber 101 or canceling the light detection hole 161, the image forming apparatus does not output the reverse rotation force to the power receiving portion 4011, and the developer is consumed by rotating in the forward direction. Further, the number of gears is reduced, and the manufacturing cost of the developing cartridge is reduced.

[0150] Embodiment Four

[0151] The present embodiment provides a new forward output member, which aims to: when the image forming apparatus outputs the forward rotation force and the reverse rotation force, the forward output member outputs the forward driving force, which is used to act as the first gear set in Embodiment One.

[0152] As shown in Figure 21 , the forward output member includes a first input gear 50, a fourth ratchet wheel 51, a transmission shaft 52, a first direction gear 53, a second direction gear 54, a retaining portion 55, a second input gear 56, a fifth ratchet wheel 57, and an output gear 58. The retaining portion 55 is used to retain the first direction gear 53 and the second direction gear 54. The first input gear 50, the second input gear 56, the first direction gear 54, and the second direction gear 54 are bevel gears.

[0153] As shown in Figure 22 and Figure 23As shown, the first input gear 50 cooperates with the fourth ratchet wheel 51, and the second input gear 56 cooperates with the fifth ratchet wheel 57. The first input gear 50 comprises a third inclined surface 501 and a third force receiving surface 502, and the fourth ratchet wheel 51 has a fourth inclined surface 511, a D-shaped hole 513, and a fourth force receiving surface 512. The first input gear 56 and the fourth ratchet wheel 51 are similar to the first embodiment. When the first input gear 50 rotates in the forward direction, the third force receiving surface 502 abuts against the fourth force receiving surface 512, and the first input gear 50 drives the fourth ratchet wheel 51 to rotate. When the first input gear 50 rotates in the reverse direction, the third inclined surface 501 cooperates with the fourth inclined surface 511. A slight deformation of the third inclined surface 501 or the fourth inclined surface 511 can make the fourth inclined surface 511 overcome the third inclined surface 501, so that no driving force is transmitted between the first input gear 50 and the fourth ratchet wheel 51. The second input gear 56, the fifth ratchet wheel 57, the first input gear 50, and the fourth ratchet wheel 51 are similar in forward and reverse rotation driving. When the second input gear 56 rotates in the forward direction, driving force is transmitted between the second input gear 56 and the fifth ratchet wheel 57. When the second input gear 56 rotates in the reverse direction, no driving force is transmitted between the second input gear 56 and the fifth ratchet wheel 57. Details are not described herein.

[0154] The fourth ratchet wheel 51, the fifth ratchet wheel 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.

[0155] As shown in Figs. 1 and 2, Figure 24 and Figure 25 When the first input gear 50 receives a forward driving force, the first input gear 50 drives the fourth ratchet wheel 51 to rotate in the forward direction. The first input gear 50 drives the second input gear 56 to rotate in the reverse direction through the first rotation direction gear 53 and the second rotation direction gear 54. No driving force is transmitted between the second input gear 56 and the fifth ratchet wheel 57. The fourth ratchet wheel 51 drives the transmission rod 52 to rotate in the forward direction, and the transmission rod 52 drives the fifth ratchet wheel 57 and the output gear 58 to rotate in the forward direction. The output gear 58 outputs a forward rotating driving force. Since no driving force is transmitted between the second input gear 56 and the fifth ratchet wheel 57, the fifth ratchet wheel 57 rotates in the forward direction with the transmission rod 52, and does not interfere with the second input gear 56 rotating in the reverse direction.

[0156] As shown in Figs. 1 and 2, Figure 26 and Figure 27As shown, when the first input gear 50 receives the reverse driving force, no driving force is transmitted between the first input gear 50 and the fourth ratchet wheel 51, the first input gear 50 makes the second input gear 56 rotate forward through the first rotational gear 53 and the second rotational gear 54, the second input gear 56 drives the fifth ratchet wheel 57 to rotate forward, the fifth ratchet wheel 57 drives the transmission rod 52 to rotate forward, the transmission rod 52 drives the fourth ratchet wheel 51 and the output gear 58 to rotate forward, the output gear 58 outputs the forward rotating driving force, since no driving force is transmitted between the first input gear 50 and the fourth ratchet wheel 51, the fourth ratchet wheel 51 rotates forward with the transmission rod 52, and does not interfere with the reverse rotating first input gear 50.

[0157] In the embodiment, by setting the forward output member, it is ensured that the output gear outputs the forward driving force no matter whether it receives the forward driving force or the reverse driving force, and further, the component is arranged on the box body 10 (how to connect is not limited here), which can simplify the structure of the box body 10 and save the mounting steps.

[0158] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A developing cartridge detachably mounted in an image forming device capable of outputting a forward driving force and a reverse driving force, characterized in that: The developing box includes: A box body for accommodating developer, the box body having a first end and a second end opposite to each other in a first direction, a third end and a fourth end opposite to each other in a second direction, and a fifth end and a sixth end opposite to each other in the third direction, the box body including a powder supply chamber and a powder replenishing chamber; a developing roller, disposed at the third end, the developing roller being rotatable about an axis extending along the first direction; A first stirring frame is disposed in the powder supply chamber; a second stirring frame, disposed in the powder replenishing chamber, for replenishing the developer in the powder replenishing chamber into the powder supply chamber; A transmission assembly is provided at the first end, the transmission assembly includes a gear set, 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 group receives the forward driving force output by the image forming device, the first gear group can drive the first stirring gear to rotate forward through the second gear group; when the first gear group receives the reverse driving force output by the image forming device, the first gear group can drive the first stirring gear to rotate forward, and the third gear group drives the second stirring gear to rotate forward.

2. The developing cartridge according to claim 1, wherein The gear set includes a transmission gear, a ratchet and a driven gear, wherein the ratchet is located between the transmission gear and the driven gear, and the ratchet can rotate with the rotation of the transmission gear. The driven gear does not transmit power to the ratchet in either the forward rotation or the reverse rotation direction, and does not transmit power when the driven gear rotates in the opposite direction to the transmission 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, no driving force is transmitted between the first transmission gear and the first driven gear. When the first transmission gear rotates reversely, the first transmission gear drives the first driven gear to rotate reversely. The second gear set includes: a second transmission gear, a second ratchet wheel and a second driven gear. When the second transmission gear rotates forward, no driving force is transmitted between the second transmission gear and the second driven gear. When the second transmission gear rotates reversely, the second transmission gear drives the second driven gear to rotate reversely. The first transmission gear is provided with a power receiving portion, which can receive the forward driving force and the reverse driving force output by the image forming device. The first driven gear and the second driven gear are engaged with the first stirring gear, and the second transmission gear is engaged with the first transmission gear.

3. The developing cartridge according to claim 2, wherein: The third gear set includes: a third transmission gear, a third ratchet and a third driven gear. When the third transmission gear rotates forward, no driving force is transmitted between the third transmission gear and the third driven gear. When the third transmission gear rotates reversely, the third transmission gear drives the third driven gear to rotate reversely. The third transmission gear is meshed with the second transmission gear, and the third driven gear is directly or through an even number of idle 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 backward, 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 transmission gear rotates reversely, the third driven gear drives the second stirring gear to rotate forward directly or through the two idle gears.

5. The developing cartridge according to claim 2, wherein: The third gear set includes a third transmission gear, which is connected to the second stirring gear through an odd number of idle 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, wherein: When the first transmission gear rotates forward or reverse, the third transmission gear drives the second stirring gear to rotate forward through one of the idle gears.

7. The developing cartridge according to claim 1, wherein: 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 is meshed with the second transmission gear, and the second transmission gear is in transmission connection with the first stirring gear and the second stirring gear. The first transmission gear is provided with a power receiving portion, and the power receiving portion is capable of receiving the positive driving force output by the image forming device to drive the first stirring gear and the second stirring gear to rotate forward; The developing box further includes a developing gear, and the first stirring gear is transmission-connected to the developing gear through a plurality of idle gears to drive the developing gear to rotate.

8. The developing cartridge according to claim 7, wherein: The second transmission gear is directly engaged with the first stirring gear; The second transmission gear is in transmission connection with the second stirring gear through the third transmission gear and an odd number of idler gears, or the second transmission gear is directly meshed with the second stirring gear; The first stirring gear is engaged with the developing gear through the two idle gears.

9. The developing cartridge according to claim 8, wherein: The powder supply cavity is provided with a rib near the third end, and the rib protrudes into the powder supply cavity along the third direction.

10. The developing cartridge according to any one of claims 1 to 6, wherein: The powder supply chamber is provided with a light detection hole near the second end, and the light detection hole is close to the sixth end in the third direction; The light detection hole is used to detect the remaining amount of developer in the powder supply chamber. When the light detection hole detects that the developer capacity is reduced to a predetermined value, the image forming device switches from outputting a forward driving force to outputting a reverse driving force.

Images