Toner cartridge and printing apparatus

Abstract

The utility model relates to the technical field of printing equipment, and provides a toner box and a printing device, and the toner box comprises a first housing and a second housing which are detachably connected; a photosensitive member; a first roller; a second roller; a stirring member; the driving assembly comprises a driving gear, a first gear, a second gear and a third gear, the first gear, the second gear and the third gear are connected with the first roller, the second roller and the stirring component respectively, the driving gear is rotationally arranged on the second shell, and the driving gear comprises a first tooth part, a second tooth part, a third tooth part and a driving force receiving part which are sequentially arranged in the axis direction of the driving gear; the first gear, the second gear and the third gear are meshed with one of the first tooth part, the second tooth part and the third tooth part in a one-to-one mode, and the driving force receiving part is located at the farthest end, back to the second shell, of the driving gear. The toner box is beneficial to accurate transmission of driving force, and solves the problem that a transmission chain on the toner box is too long in the prior art.

Description

TECHNICAL FIELD

[0001] The utility model relates to printing equipment technical field especially, relates to a toner cartridge and printing device. BACKGROUND

[0002] Toner cartridge is the consumable component of the printing equipment of electronic imaging principle, and this consumable component usually has photosensitive drum, developing roller and powder bin of storing toner, the surface of photosensitive drum is made of photosensitive material, forms latent image after receiving scanning light from the scanning part of printing equipment, and developing roller transmits toner to photosensitive drum, and toner forms image under the action of latent image.

[0003] In the imaging process, the driving part needs to drive photosensitive drum, developing roller, stirring frame, powder feeding roller and other components at the same time, and the driving part in the toner cartridge in the prior art usually realizes power transmission through transmission gear set, but since the positions of developing roller, stirring frame, powder feeding roller and other components in the powder bin are different, the current transmission gear set is provided with more intermediate gears to perform transmission function, leading to the gear transmission system inside transmission gear set being too bulky, and the assembly error caused by the too long transmission chain is prone to occur, and then the timing control is affected. SUMMARY

[0004] In order to overcome the deficiency of prior art, the purpose of the utility model lies in providing a toner cartridge and printing equipment, so as to solve the problem of too long transmission chain on the toner cartridge in prior art.

[0005] The utility model provides a toner cartridge, install in printing device, include: the first casing and second casing of detachable connection, be provided with toner cavity and the powder supply channel of intercommunication of toner cavity in second casing, photosensitive member, rotation setting in first casing, first roll, rotation setting in second casing and located the powder supply channel in the powder supply channel far from toner cavity's powder supply mouth, the surface of first roll and the surface of photosensitive member contact, second roll, rotation setting in second casing and located the powder supply channel, and with first roll contact, stirring member, rotation setting in toner cavity, drive assembly, set up in second casing's along first roll axis direction's one side, drive assembly includes drive gear and respectively with first roll, second roll and stirring member meet first gear, second gear and third gear, drive gear rotation setting in second casing, first gear, second gear and third gear arrange in the circumferential direction of drive gear, wherein, drive gear includes first tooth part, second tooth part, third tooth part and drive force receiving part along its axis direction sequential arrangement, first gear, second gear and third gear with one of first tooth part, second tooth part and third tooth part in one-to-one way mesh, drive force receiving part is located the most distal end of drive gear away from second casing.

[0006] According to the toner cartridge provided by the first aspect of the utility model, the driving gear is formed with four parts, i.e., the first tooth part, the second tooth part, the third tooth part and the drive force receiving part in the axis direction, the first tooth part, the second tooth part and the third tooth part are directly meshed with the three gears for driving the first roller, the second roller and the stirring member respectively, the transmission chain is significantly shortened, the three tooth parts are staggered in the axis direction, the three tooth parts and the meshed gears do not affect each other, the precise transmission of the driving force is facilitated, and in the structure, the drive force receiving part is located at the most distal end, the driving gear can receive the driving force from the printing device from the outside, and other components on the cartridge body are not affected.

[0007] In the preferred embodiment of the utility model, the first tooth part is meshed with the third gear, the second tooth part is meshed with the second gear, the third tooth part is meshed with the first gear, the number of teeth and the diameter of the first tooth part are smaller than those of the second tooth part, and the number of teeth and the diameter of the second tooth part are smaller than those of the third tooth part.

[0008] In the preferred embodiment of the utility model, the diameters of the tooth hubs of the first gear, the second gear and the third gear are the same.

[0009] In the preferred embodiment of the utility model, the driving gear comprises a first part and a second part which are detachably connected, the driving force receiving part, the second tooth part and the third tooth part are arranged on the first part, and the first tooth part is arranged on the second part.

[0010] In the preferred embodiment of the utility model, the second part has at least one joint protrusion which protrudes axially, and the distance between the joint protrusion and the rotation axis of the driving gear is not greater than the maximum distance between the second tooth part and the rotation axis; the second part is provided with a connecting groove which cooperates with the joint protrusion at a position close to the rotation axis.

[0011] In the preferred embodiment of the utility model, the joint protrusion is provided with joint planes on both sides in the circumferential direction of the rotation axis, the connecting groove is provided with force application planes which are used for corresponding contact with the joint planes on both sides in the circumferential direction of the rotation axis, and the occupied angle of the two force application planes of the connecting groove relative to the rotation axis is greater than the occupied angle of the two joint planes of the joint protrusion relative to the rotation axis.

[0012] In the preferred embodiment of the utility model, the connecting groove is arranged in plurality and arranged on the driving gear in circumferential adjacency along the rotation axis, and the joint protrusion is arranged in two and arranged relative to the rotation axis, and when the first part and the second part are connected, the two joint protrusions can be inserted into the two connecting grooves correspondingly.

[0013] In the preferred embodiment of the utility model, the two joint planes on the same joint protrusion are perpendicular, and the two force application planes on the same connecting groove are perpendicular.

[0014] In the preferred embodiment of the utility model, the first tooth part is a straight tooth, and the second tooth part and the third tooth part are helical teeth.

[0015] In the second aspect, the utility model provides a printing device, which comprises a device body and a toner cartridge as described in the first aspect.

[0016] Other features and advantages of the utility model will be set forth in the subsequent description, and some will become apparent from the description, or will be learned through the implementation of the technical solutions of the utility model. The purpose and other advantages of the utility model can be realized and obtained through the structure and / or process specially pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1A structure schematic view of a printing device provided by the embodiment of the present utility model;

[0018] Figure 2 A structure schematic view of a toner cartridge provided by the embodiment of the present utility model;

[0019] Figure 3 A partial structure schematic view of a toner cartridge provided by the embodiment of the present utility model Figure 1 ;

[0020] Figure 4 A partial structure schematic view of a toner cartridge provided by the embodiment of the present utility model Figure 2 ;

[0021] Figure 5 A partial structure schematic view of a toner cartridge provided by the embodiment of the present utility model Figure 4 ;

[0022] Figure 6 A structure schematic view of a driving assembly provided by the embodiment of the present utility model;

[0023] Figure 7 An exploded structure schematic view of a driving gear provided by the embodiment of the present utility model;

[0024] Figure 8 A structure schematic view of a first part of a driving gear provided by the embodiment of the present utility model.

[0025] Explanation of reference numerals:

[0026] 1 device body, 11 paper box, 12 pickup assembly, 13 conveying assembly, 14 transfer assembly, 15 developing assembly, 16 scanning assembly, 17 fixing assembly, 18 paper discharge assembly;

[0027] 100 first shell;

[0028] 200 second shell, 210 outer shell, 220 first end cover, 230 second end cover, 240 toner cavity, 250 powder supply channel, 260 powder supply port;

[0029] 300 photosensitive member;

[0030] 400 first roller;

[0031] 500 second roller;

[0032] 600 stirring member;

[0033] 700 drive assembly, 710 first gear, 720 second gear, 730 third gear, 740 drive gear, 741 first tooth, 742 second tooth, 743 third tooth, 744 drive force receiving portion, 745 first portion, 7451 connecting groove, 745a force applying plane, 746 second portion, 7461 engaging protrusion, 746a engaging plane. DETAILED DESCRIPTION

[0034] The implementation of the present application will be described in detail below with reference to the accompanying drawings and examples, so that the process of how the present application applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented. It should be noted that these specific descriptions are only to make it easier and clearer for those skilled in the art to understand the present application, and are not a limiting interpretation of the present application; for example, the first, second mentioned in the embodiments of the present application are not limited to them, but only to express the serial numbers of multiple same or similar devices, mechanisms, and those skilled in the art can also adjust these serial numbers for the convenience of expression or technical solution arrangement; and the alternative scheme of part of the mechanism is described in different embodiments, which can also be applied to other same or similar devices and mechanisms; and as long as there is no conflict, each embodiment in the present application and each feature in each embodiment can be combined with each other, and the technical solutions formed are within the protection scope of the present application.

[0035] The technical solutions of the present application will be described in detail below with reference to the accompanying drawings and specific examples.

[0036] The embodiment of the present application provides a printing device, referring to Figure 1 , comprising a device body 1 and a paper box 11, a pickup assembly 12, a conveying assembly 13, a transfer assembly 14, a developing assembly 15, a scanning assembly 16, a fixing assembly 17 and a paper discharge assembly 18 arranged in the device body 1, a paper conveying path is arranged in the device body 1, paper used for printing is stacked and stored in the paper box 11, the pickup assembly 12 comprises a pickup roller, the pickup roller is in contact with the stacked paper and sends the paper into the paper conveying path, the conveying assembly 13 comprises a correction roller and a paper feed roller, the correction roller is used for correcting the position of the paper in the paper conveying path, and the paper feed roller is used for transmitting the paper in the paper conveying path, the developing assembly 15 forms an image composed of toner in its interior, and transfers the image to the transfer assembly 14, the transfer assembly 14 transfers the image in the paper conveying path, after the paper obtains the image, the paper is further conveyed to the fixing assembly 17, the fixing assembly 17 fixes the image on the surface of the paper in a heating mode, and the paper after printing is finally discharged to outside the device body 1 by the paper discharge assembly 18.

[0037] The scanning assembly 16 includes a laser emitting unit and an optical member for deflecting the laser emitted by the laser emitting unit, which can be composed of a plurality of optical components, to the developing assembly 15 for the imaging process of the developing assembly 15. Figures 2 to 8 The developing assembly 15 includes a photosensitive drum having a photosensitive surface thereon, to which the laser is deflected to form a latent electrostatic image, and the latent electrostatic image is used to form an image with toner.

[0038] In the first aspect of the embodiment, the developing assembly 15 includes a toner cartridge, referring to Figures 2 to 8 The first shell 100 and the second shell 200 are detachably connected to form a whole, and the detachable connection can be in the form of screw connection. The photosensitive member 300 is rotatably connected in the first shell 100, and the first roller 400, the second roller 500 and the stirring member 600 are rotatably connected in the second shell 200. The second shell 200 is provided with a toner storage cavity 240 for storing toner and a powder supply channel 250 connected with the toner storage cavity 240. The first roller 400 and the second roller 500 are arranged in the powder supply channel 250, and the first roller 400 is arranged on a powder supply port 260 of the powder supply channel 250 away from the toner storage cavity 240, and the surface of the first roller 400 is in contact with the surface of the photosensitive member 300 to transfer toner to the photosensitive member 300. The stirring member 600 is rotatably arranged in the toner storage cavity 240 and has one or more stirring blades or stirring paddles thereon, which are used to stir the toner in the toner storage cavity 240 and push the toner to the powder supply channel 250. Thus, the transmission path of the toner in the second shell 200 is: the toner is pushed into the powder supply channel 250 from the toner storage cavity 240, the second roller 500 is arranged in the powder supply channel 250 downstream of the first roller 400 and in contact with the surface of the first roller 400, so as to transfer the toner in the powder supply channel 250 to the first roller 400, and the first roller 400 transfers the toner to the photosensitive member 300 in a contact manner through the surface thereof, so as to realize the image forming process.

[0039] The second shell 200 comprises an outer shell 210 and two end covers which are detachably connected to the two ends of the outer shell 210 in the axial direction, which can be the axial direction of the first roller 400, the second roller 500 or the stirring member 600, and the axial directions of the three are arranged in parallel. The two end covers are respectively a first end cover 220 and a second end cover 230. The box body has a connecting plate on one side. The first end cover 220 is detachably connected to the inner side of the connecting plate in the axial direction. The first end of the outer shell 210 is detachably connected to the first end cover 220. The second end cover 230 is detachably fixed to the second end of the outer shell 210 and the first shell 100 in the direction perpendicular to the axis. Therefore, the second shell 200 is detachably fixedly connected with the first shell 100 through the two end covers to form an integral structure. It should be noted that all the detachable connections or fixing modes in the above structure can be screw connection, buckle connection or other detachable fixing modes.

[0040] Continuing to refer to Figures 3 to 5 , the toner box further comprises a driving assembly 700 arranged on one side of the second shell 200 along the axial direction of the first roller 400, specifically on the first end cover 220 in this embodiment. The driving assembly 700 comprises a driving gear 740, a first gear 710, a second gear 720 and a third gear 730. The first gear 710, the second gear 720 and the third gear 730 are respectively connected to the first roller 400, the second roller 500 and the stirring member 600. The connection mode can be a synchronous structure or a key connection on the end of the first roller 400, the second roller 500 or the stirring member 600. The synchronous structure is a non-circular cross-sectional shape, such as a square, so that the three gears directly drive the first roller 400, the second roller 500 and the stirring member 600 to rotate after receiving the driving force from the driving gear 740. The first gear 710, the second gear 720 and the third gear 730 are arranged in the circumferential direction of the driving gear 740, forming a layout around the driving gear 740, so that the driving gear 740 is evenly stressed under this layout structure and is not prone to transmission misalignment and other problems.

[0041] In order to match the transmission engagement with the first gear 710, the second gear 720 and the third gear 730, the driving gear 740 comprises a first tooth portion 741, a second tooth portion 742, a third tooth portion 743 and a driving force receiving portion 744 arranged in sequence along its axial direction (such as the direction P in Figure 7 The first gear 710, the second gear 720 and the third gear 730 correspondingly engage with one of the first tooth portion 741, the second tooth portion 742 and the third tooth portion 743 in a one-to-one manner, that is, one of the three tooth portions will engage with one of the three gears, and will not simultaneously engage with two or more of the three gears, for example, in Figure 4In the embodiment shown in the figure, the first tooth part 741 is engaged with the third gear 730, the second tooth part 742 is engaged with the second gear 720, and the third tooth part 743 is engaged with the first gear 710. According to the above structural description, the driving gear 740 directly drives the first gear 710, the second gear 720 and the third gear 730 in meshing mode in the axial direction by using the first tooth part 741, the second tooth part 742 and the third tooth part 743 at the same time, shortens the transmission chain between the first roller 400, the second roller 500, the stirring member 600 and the driving gear 740, reduces transmission loss and transmission error, so as to realize accurate control, and since the tooth parts are staggered in the axial direction, the three tooth parts can be staggered in the axial direction when they are engaged with the three gears respectively, so as to prevent mutual interference, and in combination with the circumferential layout structure arranged around, the driving gear 740 can rotate stably at the position of the second housing 200, and the driving force receiving part 744 is located at the farthest end of the driving gear 740 away from the second housing 200, so that when the external driving part on the device body is connected to the driving force receiving part 744, the driving force receiving part 744 is forced in the axial direction, so as to provide pre-tightening force of the driving gear 740 in the axial direction, so that the received driving force can be transmitted to the gears more stably.

[0042] In the imaging process of the toner cartridge, the driving gear 740 receives the driving force from the external driving part, and at the same time drives the first roller 400, the second roller 500 and the stirring member 600 to rotate through the engaged first gear 710, the second gear 720 and the third gear 730 respectively, the stirring member 600 pushes the toner from the toner cavity 240 to the powder supply channel 250, the second roller 500 transmits the toner to the first roller 400 on the powder supply port 260, the first roller 400 transmits the toner to the photosensitive member 300 through the toner layer on the surface, the charge of the latent image on the photosensitive member 300 attracts the toner to form an image, and then the photosensitive member 300 continues to rotate to transfer the image composed of toner to the transfer assembly.

[0043] In Figure 6In the embodiment shown in the middle, the number of teeth and the diameter of the first tooth portion 741 are smaller than those of the second tooth portion 742, and the number of teeth and the diameter of the second tooth portion 742 are smaller than those of the third tooth portion 743, that is, the number of teeth and the diameter: third tooth portion 743 > second tooth portion 742 > first tooth portion 741, which presents a tapered arrangement structure in the axial direction, and the small end of the taper, that is, the first tooth portion 741, is close to the inner side of the axial direction. Specifically, the driving assembly 700 is located between the housing 210 and the first end cover 220, and after the first end cover 220 is detachably connected to the housing 210, a receiving space is formed between the first end cover 220 and the outer side wall of the housing 210. The first gear 710, the second gear 720, the third gear 730, and the driving gear 740 are all in the receiving space, and the first end cover 220 axially positions the four gears to prevent them from coming off. The third tooth portion 743 on the driving gear 740 has the largest cross-sectional area and can be effectively positioned on the inner side of the first end cover 220. The first end cover 220 has a driving opening that exposes the driving force receiving portion 744 outside the toner cartridge, and the diameter of the driving force receiving portion 744 is smaller than the diameter of the third tooth portion 743, thereby forming a limiting effect. This structure matches the transmission ratio of the first roller 400, the second roller 500, and the stirring member 600. During the imaging process, the rotation speeds of the three components should be first roller 400 > second roller 500 > stirring member 600. The tapered structure design can maintain the stability of the driving force transmission, and the direct engagement form also facilitates the simple optimization design of the gear transmission ratio, making the structure simpler and more reliable.

[0044] Further, the diameters of the tooth hubs of the first gear 710, the second gear 720, and the third gear 730 are the same. In the case of the same diameter tooth hub, only the diameter and the number of teeth in the first tooth portion 741, the second tooth portion 742, and the third tooth portion 743 on the driving gear 740 need to be considered to achieve the timing control design process of the toner cartridge imaging process, reducing the design errors and production errors caused by the calculation amount, and ensuring the orderly and accurate imaging.

[0045] In one embodiment, the driving gear 740 comprises a first part 745 and a second part 746 which are detachably connected, the driving force receiving part 744, the second tooth part 742 and the third tooth part 743 are arranged on the first part 745, and the first tooth part 741 is arranged on the second part 746. The embodiment splits the driving gear 740 into two parts, aiming to avoid the complexity of a single gear structure, facilitate mold opening and installation, and reduce the problem of different forces in the axial direction of a single structure, so as to make the driving gear 740 stable in structure at the connection part.

[0046] Specifically, the second part 746 has at least one engagement protrusion 7461 which protrudes axially, and the distance between the engagement protrusion 7461 and the rotation axis of the driving gear 740 is not greater than the maximum distance between the first tooth part 741 and the rotation axis. The second part 746 is provided with a connection groove 7451 which cooperates with the engagement protrusion 7461 at a position close to the rotation axis. Referring to Figure 7 and Figure 8 The distance between the engagement protrusion 7461 and the rotation axis P is L1, and the distance between the second tooth part 742 and the rotation axis P is L2, L1 < L2, so that the second part 746 can be provided with the connection groove 7451 which cooperates with the engagement protrusion 7461 inside it, and the connection groove 7451 is located at the recessed position of the second part 746 towards the first part 745, which extends from the plane where the second tooth part 742 is located to the plane where the third plane is located. When the first part 745 is combined with the second part 746, the engagement protrusion is inserted into the connection groove 7451, and is combined and limited on the second shell 200 under the limitation of the side wall of the shell 210 and the first end cover 220, facilitating assembly.

[0047] Further, the engagement protrusion 7461 is provided with an engagement plane 746a on both sides in the circumferential direction of the rotation axis, and the connection groove 7451 is provided with a force applying plane 745a which is used to correspondingly contact the engagement plane 746a on both sides in the circumferential direction of the rotation axis (such as the direction U in Figure 7 The first part 745 applies force on the engagement plane 746a through the force applying plane 745a after receiving the driving force from the outside through the driving force receiving part 744, further driving the rotation of the second part 746. The occupied angle of the two force applying planes 745a of the connection groove 7451 relative to the rotation axis is greater than the occupied angle of the engagement plane 746a of the engagement protrusion 7461 relative to the rotation axis, and the occupied angles of the connection groove 7451 and the engagement protrusion 7461 are as shown in Figure 2The angle R1 and R2 in the first part 745 and the second part 746, in the case that R1 is greater than R2, the connecting groove 7451 and the engaging convex part 7461 have a buffer gap before contact, which can make the first part 745 have a slight rotating effect relative to the second part 746, and can avoid damage between the structures caused by excessive rigid contact. Of course, the two engaging planes 746a can also be directly in contact with the two connecting force applying planes 745a after the engaging convex part 7461 is inserted into the connecting groove 7451, and the first part 745 and the second part 746 can also achieve the effect of detachable cooperation, which is within the scope of the present application.

[0048] Referring to Figure 8 , the connecting groove 7451 is provided with a plurality of and arranged adjacent to the driving gear 740 along the rotation axis, and the convex part is provided with two and arranged relative to the rotation axis, when the first part 745 and the second part 746 are engaged, the two engaging convex parts 7461 can be inserted into the two connecting grooves 7451. This structure facilitates the engagement of the two, and does not need to be aligned to achieve mutual cooperation.

[0049] Among them, the two engaging planes 746a on the same engaging convex part 7461 are perpendicular, and the two force applying planes 745a on the same connecting groove 7451 are perpendicular. Both planes are vertically arranged, which is beneficial to the plug-in cooperation, and the connecting groove 7451 is provided with four in the embodiment, and the vertical structure can effectively utilize the space in the recess.

[0050] In addition, as Figure 6 shown, the first tooth part 741 is a straight tooth, and the second tooth part 742 and the third tooth part 743 are helical teeth, the straight tooth is accurate in transmission and simple in processing under small transmission, and the second tooth part 742 and the third tooth part 743 ensure the transmission accuracy of the first roller 400 and the second roller 500 directly involved in the imaging process.

[0051] Finally, it should be noted that the above description is only the best embodiment of the present application, and does not limit the present application in any form. Any person skilled in the art, without departing from the scope of the present application, can make many possible changes and simple replacements to the present application by using the above disclosed methods and technical contents, which are within the scope of the present application.

Claims

1. A toner cartridge installed in a printing device, characterized by, The application relates to a detachable first shell and a second shell, wherein a toner cavity and a powder supply channel communicating with the toner cavity are arranged in the second shell; a photosensitive member is arranged in the first shell; a first roller is arranged in the second shell and located at a powder supply port of the powder supply channel away from the toner cavity, and the surface of the first roller is in contact with the surface of the photosensitive member; a second roller is arranged in the second shell and located in the powder supply channel, and the second roller is in contact with the first roller; a stirring member is arranged in the toner cavity; a driving assembly is arranged on one side of the second shell along the axial direction of the first roller, and the driving assembly comprises a driving gear and first, second and third gears in contact with the first roller, the second roller and the stirring member respectively, the driving gear is arranged on the second shell in rotation, and the first, second and third gears are arranged in the circumferential direction of the driving gear; wherein the driving gear comprises a first tooth part, a second tooth part, a third tooth part and a driving force receiving part arranged in sequence along the axial direction of the driving gear, one of the first, second and third gears is in one-to-one engagement with one of the first, second and third tooth parts, and the driving force receiving part is located at the farthest end of the driving gear away from the second shell. The first tooth part is in engagement with the third gear, the second tooth part is in engagement with the second gear, the third tooth part is in engagement with the first gear, the number of teeth and the diameter of the first tooth part are smaller than those of the second tooth part, and the number of teeth and the diameter of the second tooth part are smaller than those of the third tooth part. The diameters of the tooth hubs of the first, second and third gears are the same. The driving gear comprises a first part and a second part in detachable engagement, the driving force receiving part, the second tooth part and the third tooth part are arranged on the first part, and the first tooth part is arranged on the second part. The second part has at least one engagement protrusion axially protruding therefrom, the distance between the engagement protrusion and the rotation axis of the driving gear is not greater than the maximum distance between the second tooth part and the rotation axis; The second part is provided with a connecting groove matched with the engagement protrusion at a position close to the rotation axis. The engagement protrusion is provided with engagement planes on both sides in the circumferential direction of the rotation axis, the connecting groove is provided with force applying planes for corresponding contact with the engagement planes on both sides in the circumferential direction of the rotation axis, and the occupied angle of the two force applying planes of the connecting groove relative to the rotation axis is greater than the occupied angle of the two engagement planes of the engagement protrusion relative to the rotation axis. ​ 2. The toner cartridge of claim 1, wherein, ​ 3. The toner cartridge of claim 2, wherein, ​ 4. The toner cartridge of claim 2, wherein, ​ 5. The toner cartridge of claim 4, wherein, ​ ​ 6. The toner cartridge of claim 5, wherein, ​ 7. The toner cartridge of claim 6, wherein, The connecting grooves are arranged on the driving gear in plurality and circumferentially adjacent along the rotation axis, and the engaging protrusions are arranged in two and opposite to the rotation axis, and two of the engaging protrusions can be correspondingly inserted into two of the connecting grooves when the first part and the second part are engaged.

8. The toner cartridge of claim 7, wherein, The two engaging planes on the same engaging protrusion are perpendicular, and the two force applying planes on the same connecting groove are perpendicular.

9. The toner cartridge of any one of claims 2 to 8, wherein, The first tooth part is straight tooth, and the second tooth part and the third tooth part are helical tooth.

10. A printing device, characterized by The toner cartridge comprises a device body and the toner cartridge as claimed in any one of claims 1 to 9 arranged in the device body.

Images