Developing cartridge

Abstract

The utility model provides a developing box which is detachably mounted in imaging equipment provided with a driving force output part, and comprises a shell used for accommodating carbon powder; the developing part extends in the left-right direction, is rotatably arranged in the shell and is used for supplying the borne carbon powder to the outside; the powder feeding part extends in the left-right direction, is rotatably arranged in the shell, is in contact with the developing part and is used for uniformly distributing the carbon powder borne on the surface of the developing part; the driving assembly is rotatably arranged at the longitudinal tail end of the shell and at least comprises a driving force receiving piece with a driving head and a driving gear which are coaxially arranged, the driving head is used for being combined with the driving force output piece to receive the driving force, and the driving gear is used for directly or indirectly driving the developing piece and the powder feeding piece to rotate; when the driving force receiving part drives the developing part and the powder feeding part to rotate, the rotating directions of the developing part and the powder feeding part are the same when the developing part and the powder feeding part are observed in the left-right direction; according to the scheme, the driving force is transmitted through the synchronous cog belt, so that the developing quality is improved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of electronic imaging, in particular to a developing box which is detachably installed in an electronic imaging device. Background Art

[0002] A developing cartridge is a consumable item that can be detachably mounted on an electronic imaging device (hereinafter referred to as "imaging device"). The developing cartridge housing contains toner that can be supplied to the imaging device, as well as rotating parts such as a developing part, a powder feeding part, and a stirring part. Usually, a driving force receiving part is also provided at the end of the developing cartridge to receive the driving force provided by the imaging device and drive the above-mentioned rotating parts to rotate for developing / imaging work.

[0003] Typically, the developer cartridge transmits driving force through gear transmission. Generally, the gear transmission assembly includes a driving gear, a developing gear, a powder feeding gear, a stirring gear, and an idler gear.

[0004] In existing developing boxes, the driving force is generally transmitted by gear meshing, for example, the driving gear is directly meshed with the developing gear, powder feeding gear, and stirring gear, or the driving gear is indirectly meshed with the developing gear, powder feeding gear, and stirring gear through an idler gear, or the developing gear is directly meshed with the powder feeding gear, or the developing gear is meshed with the powder feeding gear through an idler gear, etc.

[0005] However, during long periods of rotation, meshing errors may occur between gears, and the wear between gears increases, shortening the life of the gears and requiring frequent gear replacement, which increases maintenance costs. Utility Model Content

[0006] The present invention provides a developing box to solve the above technical problems. The details are as follows:

[0007] A developing box is detachably mounted in an imaging device provided with a driving force output member, and the developing box includes: a shell for accommodating carbon powder; a developing member extending in the left-right direction, rotatably arranged in the shell, and used for supplying the carried carbon powder to the outside; a powder feeding member extending in the left-right direction, rotatably arranged in the shell, in contact with the developing member, and used for evenly distributing the carbon powder carried on the surface of the developing member; a driving assembly rotatably arranged at the longitudinal end of the shell, comprising at least a driving force receiving member having a coaxially arranged driving head and a driving gear, the driving head being used to combine with the driving force output member to receive the driving force, and the driving gear being used to directly or indirectly drive the developing member and the powder feeding member to rotate; when the driving force receiving member drives the developing member and the powder feeding member to rotate, the developing member and the powder feeding member have the same rotation direction when viewed in the left-right direction.

[0008] The drive assembly also includes a synchronous toothed belt, a developing gear and a powder feeding gear. The developing gear is installed at the longitudinal end of the developing part, and the powder feeding gear is installed at the longitudinal end of the powder feeding part. The synchronous toothed belt cooperates with at least one of the developing gear and the powder feeding gear.

[0009] The developing box also includes a stirring member rotatably arranged in the shell, and the driving assembly also includes a stirring gear and a first idler wheel, the stirring gear is installed at the longitudinal end of the stirring member, the first idler wheel is installed at the longitudinal end of the shell, the first idler wheel includes a first gear portion and a second gear portion coaxially arranged, the first gear portion is engaged with the driving force receiving member, and the second gear portion is engaged with the stirring gear.

[0010] The driving assembly further includes a second idler wheel, which cooperates with the driving gear and the synchronous toothed belt at the same time. The synchronous toothed belt rotates around the second idler wheel and the developing gear, and the powder feeding gear is meshed with the driving gear.

[0011] The driving assembly further comprises a second idler wheel, which cooperates with the driving gear and the synchronous toothed belt at the same time, and the synchronous toothed belt rotates around the second idler wheel, the developing gear and the powder feeding gear.

[0012] The powder feeding gear cooperates with the driving gear and the synchronous toothed belt at the same time, and the synchronous gear belt rotates around the powder feeding gear and the developing gear.

[0013] The second idler gear includes a third gear portion and a third coupling portion that are coaxially arranged. The third gear portion is engaged with the driving gear to receive the driving force, and the third coupling portion is engaged with the synchronous toothed belt.

[0014] The powder feeding gear includes a fourth gear portion and a fourth coupling portion which are coaxially arranged. The fourth gear portion is engaged with the driving gear to receive the driving force, and the fourth coupling portion is matched with the synchronous toothed belt.

[0015] The utility model transmits driving force by arranging a synchronous toothed belt, thereby improving the developing / imaging quality of the developing box and reducing the use cost of the developing box. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of a developing box involved in an embodiment of the present utility model.

[0017] Figure 2A This is an exploded view of some components of the developing box involved in Example 1 of the present utility model.

[0018] Figure 2B This is an exploded view of the developer box involved in the first embodiment of the present invention with some components hidden.

[0019] Figure 3This is a side view of the developer cartridge according to the first embodiment of the present invention with some components hidden, when viewed from left to right along the left-right direction.

[0020] Figure 4A and Figure 4B It is a schematic diagram of the synchronous toothed belt involved in the first embodiment of the present invention.

[0021] Figure 5 This is a three-dimensional diagram of the developing box involved in the second embodiment of the present invention after some components are hidden.

[0022] Figure 6 This is a side view of the developing box involved in the second embodiment of the present invention after some components are hidden, when viewed from left to right along the left-right direction.

[0023] Figure 7A and Figure 7B It is a schematic diagram of the synchronous toothed belt involved in the second embodiment of the present utility model.

[0024] Figure 8 This is a three-dimensional diagram of the developer box involved in the third embodiment of the present invention with some components hidden.

[0025] Figure 9 This is a side view of the developer cartridge according to the third embodiment of the present invention with some components hidden, when viewed from left to right along the left-right direction.

[0026] Figure 10A and Figure 10B Schematic diagram of the synchronous toothed belt involved in the third embodiment of the present invention. DETAILED DESCRIPTION

[0027] Figure 1 It is a three-dimensional diagram of a developing box involved in an embodiment of the present utility model.

[0028] For ease of description and understanding, Figure 1 The various directions involved in the present invention are defined based on the state of the developing box 100. The developing box 100 has a left-right direction parallel to the length direction / longitudinal direction, a front-back direction parallel to the width direction / transverse direction, and an up-down direction parallel to the height direction / vertical direction. The developing box 100 is installed forward along the front-back direction and taken out backward; the front-back direction, the up-down direction and the left-right direction intersect with each other in pairs. Preferably, the front-back direction, the up-down direction and the left-right direction are perpendicular to each other in pairs.

[0029] The developing cartridge 100 may be directly installed in the image forming apparatus in a detachable manner, or may be first installed in the drum frame and then the developing cartridge 100 and the drum frame may be installed in the image forming apparatus together.

[0030] like Figure 1As shown, the developing box 100 includes a housing 1 for accommodating carbon powder, a developing member 2 rotatably disposed in the housing 1, and a powder feeding member 3 (such as a Figure 2B As shown) and stirring member 4 (as Figure 2B As shown, the housing 1 includes a first housing 11 and a second housing 12 that are coupled to each other. The cavity formed between the first housing 11 and the second housing 12 can be used to accommodate toner. The stirring member 4 is used to stir the toner contained in the housing 1 to prevent the toner from agglomerating and to facilitate its transport to the powder feeding member 3. The powder feeding member 3 is in contact with the developing member 2 and is used to transport the carried toner to the developing member 2. The developing member 2 is used to supply the carried toner to an external photosensitive member to develop an electrostatic latent image formed on the surface of the photosensitive member. The developing member 2, the powder feeding member 3, and the stirring member 4 respectively have a rotation axis L2, a rotation axis L3, and a rotation axis L4 parallel to the left-right direction.

[0031] The developing box 100 further includes a powder discharge knife 5 provided on the housing 1 . The powder discharge knife 5 is in contact with the developing component 2 and is used to evenly distribute the carbon powder carried on the surface of the developing component 2 .

[0032] The developing box 100 also includes a driving assembly 6 arranged at the longitudinal end of the shell 1, and the driving assembly 6 is used to receive driving force from the imaging device and drive at least one of the developing part 2, the powder feeding part 3 and the stirring part 4 to rotate. In the left and right directions, at least a portion of the driving assembly 6 is blocked by the end cover 13 arranged at the longitudinal end of the developing box 100 to avoid collision with other parts and damage.

[0033] Furthermore, the drive assembly 6 includes at least a driving force receiving member 61, which receives driving force from the imaging device and transmits the driving force to at least one of the developing member 2, the powder feeding member 3, and the stirring member 4. The driving force receiving member 61 has a coaxially arranged driving head 611 and a driving gear 612. The driving head 611 is exposed from the end cover 13 and is configured to engage with a driving force output member in the imaging device to receive driving force. The driving gear 612 rotates synchronously with the driving head 611 about the rotation axis L61.

[0034] The driving assembly 6 also includes a developing gear 62, a powder feeding gear 63 and a stirring gear 64. Specifically, the developing gear 62 is arranged at the longitudinal end of the developing part 2, and is used to drive the developing part 2 to rotate around the rotation axis L2. The powder feeding gear 63 is arranged at the longitudinal end of the powder feeding part 3, and is used to drive the powder feeding part 3 to rotate around the rotation axis L3. The stirring gear 64 is arranged at the longitudinal end of the stirring part 4, and is used to drive the stirring part 4 to rotate around the rotation axis L4.

[0035] This article defines the end where the driving force receiving member 61 is located in the longitudinal direction as the driving end, and the end opposite to the driving end is defined as the non-driving end; further, in this embodiment, the driving end is located on the left side of the developing box 100, and the non-driving end is located on the right side of the developing box 100; in the height direction of the developing box 100, the gravity direction of the developing box 100 is defined as the bottom of the developing box 100, and the direction opposite to the bottom is defined as the top of the developing box 100.

[0036] [Example 1]

[0037] Figure 2A This is an exploded view of some components of the developing cartridge according to the first embodiment of the present invention; Figure 2B This is an exploded view of the developer cartridge according to the first embodiment of the present invention with some components hidden; Figure 3 This is a side view of the developer cartridge according to the first embodiment of the present invention, when viewed from left to right along the left-right direction after some components are hidden; Figure 4A and Figure 4B It is a schematic diagram of the synchronous toothed belt involved in the first embodiment of the present invention.

[0038] like Figure 2A 、 Figure 2B and Figure 3 、 Figure 4A and Figure 4B As shown, the powder feeding gear 63 directly receives the driving force from the driving gear 612. Specifically, the driving gear 612 directly meshes with the powder feeding gear 63 and transmits the driving force directly to the powder feeding gear 63, so that the powder feeding gear 63 drives the powder feeding member 3 to rotate along the direction r1.

[0039] The developing gear 62 and the stirring gear 64 receive driving force indirectly from the driving gear 612 . Specifically, the driving assembly 6 further includes a first idler gear 65 and a second idler gear 66 disposed at the longitudinal ends of the housing 1 .

[0040] Furthermore, the first idler gear 65 is engaged with the driving gear 612 and the stirring gear 64 at the same time. Preferably, the first idler gear 65 includes a first gear portion 651 and a second gear portion 652 arranged coaxially. The first gear portion 651351 is directly engaged with the driving gear 612, and the second gear portion 652 is directly engaged with the stirring gear 64. After the first gear portion 651 receives the driving force transmitted by the driving gear 612, it drives the second gear portion 652 to rotate and directly transmits the driving force to the stirring gear 64, so that the stirring gear 64 drives the stirring member 4 to rotate along the direction r1. In the left and right directions, the first gear portion 651 is farther away from the center of the shell 1 in the left and right directions than the second gear portion 652. In the front and back directions, the size of the first gear portion 651 is larger than the size of the second gear portion 652.

[0041] In the embodiment, the first idler gear 65 is mounted on the housing 1, and in an embodiment, the first idler gear 65 can also be mounted on the end cover 13 or the bracket 14 described below.

[0042] Further, the second idler gear 66 is directly engaged with the driving gear 612 to transmit the driving force received from the driving gear 612 to the developing gear 62, and as an embodiment, the driving assembly 6 further comprises a synchronous toothed belt 67, the synchronous toothed belt 67 comprises a first engaging portion, and further, the first engaging portion comprises a plurality of first protrusions 671 distributed at intervals, and a first groove 672 is formed between adjacent two first protrusions 671. In the embodiment, the second idler gear 66 and the developing gear 62 are synchronous gears cooperating with the synchronous toothed belt 67, and the second idler gear 66 and the developing gear 62 are located at two ends of the synchronous toothed belt 67, and specifically, the second idler gear 66 comprises a third gear portion 661 coaxially arranged and a third engaging portion, the third engaging portion comprises a plurality of third protrusions 662 distributed at intervals, and a third groove 663 is formed between adjacent two third protrusions 662; the developing gear 62 comprises a second engaging portion, the second engaging portion comprises a plurality of second protrusions 621 distributed at intervals, and a second groove 622 is formed between adjacent two second protrusions 621, the third gear portion 661 is directly engaged with the driving gear 612, and the third engaging portion and the developing gear 62 are engaged with the synchronous toothed belt 67, and specifically, the third protrusions 662 and the second protrusions 621 are cooperated with the first grooves 672, the first protrusions 671 are cooperated with the second grooves 663 and the third grooves 622, and after the third gear portion 661 receives the driving force, the third engaging portion is driven to rotate along the direction r1, thereby driving the synchronous toothed belt 67 to rotate around the third engaging portion of the second idler gear 66 and the second engaging portion of the developing gear 62, and further driving the developing gear 62 and the second idler gear 66 to rotate synchronously, and finally driving the developing member 2 to rotate along the direction r1 by the developing gear 62.

[0043] In the embodiment, the developing cartridge 100 further comprises a bracket 14 arranged at the longitudinal end of the housing 1, and the bracket 14 is at least used for supporting the developing member 2 and the powder feeding member 3, and the driving force receiving member 61 and / or the second idler gear 66 is mounted on the bracket 14, and in an embodiment, the driving force receiving member 61 and / or the second idler gear 66 can also be mounted on the end cover 13 or the housing 1.

[0044] Further, the developing gear 62 is provided with a first baffle 623, and the second idler gear 66 further comprises a second baffle 664 arranged between the third gear portion 661 and the third engaging portion, and the bracket 14, the first baffle 623 and the second baffle 664 are used for limiting the displacement of the synchronous toothed belt 67 in the left-right direction, so as to prevent the synchronous toothed belt 67 from falling off in the left-right direction, thereby ensuring that the driving force can be more stably transmitted to the developing gear 62.

[0045] In one embodiment, the first protrusion 671 on the synchronous toothed belt 67, the third protrusion 662 on the second idler gear 66, and the second protrusion 621 on the developing gear 62 can also be set as teeth, and the teeth set on the driving gear 612, the teeth set on the powder feeding gear 63, the teeth set on the stirring gear 64, the teeth set on the first idler gear 65, and the teeth set on the third gear part 661 can also be protrusions distributed at intervals, as long as the transmission of driving force can be achieved between the various components.

[0046] The beneficial effects that can be obtained by this embodiment are: by providing the synchronous toothed belt 67, the developing gear 62 and the second idler gear 66 can be rotated in the same direction.

[0047] [Example 2]

[0048] Figure 5 This is a three-dimensional diagram of the developer cartridge according to the second embodiment of the present invention with some components hidden; Figure 6 This is a side view of the developing cartridge according to the second embodiment of the present invention after some components are hidden, when viewed from left to right along the left-right direction; Figure 7A and Figure 7B It is a schematic diagram of the synchronous toothed belt involved in the second embodiment of the present utility model.

[0049] This embodiment is different from the first embodiment in that, in this embodiment, the developing gear 62 receives the driving force through the powder feeding gear 63. At the same time, the developing gear 62 and the powder feeding gear 63 are not directly engaged. In this embodiment, the second idler gear 66 is eliminated, as follows.

[0050] The stirring gear 64 receives the driving force indirectly from the driving gear 612 . For detailed description, please refer to the first embodiment, which will not be repeated here.

[0051] like Figure 5 、 Figure 6 、 Figure 7A and Figure 7B As shown, the powder feeding gear 63 directly receives the driving force from the driving gear 612 and transmits the driving force to the developing gear 62. Specifically, the driving gear 612 directly meshes with the powder feeding gear 63 and transmits the driving force directly to the powder feeding gear 63, so that the powder feeding gear 63 drives the powder feeding part 3 to rotate along the direction r1.

[0052] The developing gear 62 receives driving force indirectly from the driving gear 612 . Specifically, in this embodiment, the powder feeding gear 63 and the developing gear 62 act as synchronous wheels and engage with the synchronous toothed belt 67 . The powder feeding gear 63 and the developing gear 62 are respectively located at both ends of the synchronous toothed belt 67 . Specifically, the powder feeding gear 63 includes a coaxially arranged fourth gear portion 631 and a fourth coupling portion, the fourth coupling portion includes a plurality of spaced fourth protrusions 632, and a fourth groove 633 is formed between two adjacent fourth protrusions 632. The fourth gear portion 631 is directly engaged with the driving gear 612, and the fourth coupling portion and the developing gear 62 are both engaged with the synchronous toothed belt 67. Specifically, the fourth protrusion 632 and the second protrusion 621 are both matched with the first groove 672, and the first protrusion 671 is matched with the fourth groove 633 and the second groove 622. After receiving the driving force, the fourth gear portion 631 drives the fourth coupling portion to rotate synchronously along the direction r1, thereby driving the synchronous toothed belt 67 to rotate around the fourth coupling portion of the powder feeding gear 63 and the second coupling portion of the developing gear 62, and then driving the developing gear 62 to rotate synchronously with the powder feeding gear 63, and finally making the developing gear 62 drive the developing member 2 to rotate along the direction r1.

[0053] In this embodiment, the driving force receiving member 61 is mounted on the bracket 14 or the end cover 13 or the housing 1 .

[0054] Furthermore, the developing gear 62 is also provided with a first baffle 623, and the powder feeding gear 63 also includes a third baffle 634 arranged between the fourth gear portion 631 and the fourth joint portion. The bracket 14, the first baffle 623 and the third baffle 634 are used to limit the displacement of the synchronous toothed belt 67 in the left and right directions to prevent the synchronous toothed belt 67 from falling off in the left and right directions, thereby ensuring that the driving force can be transmitted to the developing gear 62 more smoothly.

[0055] In one embodiment, the first protrusion 671 on the synchronous toothed belt 67, the fourth protrusion 632 on the powder feeding gear 63, and the second protrusion 621 on the developing gear 62 can also be set as teeth, and the teeth set on the driving gear 612, the teeth set on the fourth gear part 631, the teeth set on the stirring gear 64, and the teeth set on the first idler gear 65 can also be protrusions distributed at intervals, as long as the transmission of driving force can be achieved between the various components.

[0056] The beneficial effects that can be obtained by this embodiment are as follows: by providing the synchronous toothed belt 67 , the developing gear 62 and the powder feeding gear 63 can be made to rotate in the same direction.

[0057] [Example 3]

[0058] Figure 8 This is a three-dimensional diagram of the developer cartridge according to the third embodiment of the present invention with some components hidden; Figure 9This is a side view of the developer cartridge according to the third embodiment of the present invention, with some components hidden, when viewed from left to right along the left-right direction; Figure 10A and Figure 10B Schematic diagram of the synchronous toothed belt involved in the third embodiment of the present invention.

[0059] This embodiment is different from the first embodiment in that, in this embodiment, the developing gear 62 and the powder feeding gear 63 both receive driving force indirectly from the driving gear 612 through the second idler gear 66 , as follows.

[0060] The stirring gear 64 receives the driving force indirectly from the driving gear 612 . For detailed description, please refer to the first embodiment, which will not be repeated here.

[0061] like Figure 8 、 Figure 9 、 Figure 10A and Figure 10B As shown, the second idler gear 66 is directly engaged with the drive gear 612 to transmit the driving force received from the drive gear 612 to the developing gear 62 and the powder feeding gear 63. In this embodiment, the powder feeding gear 63 also acts as a synchronous gear and is engaged with the synchronous toothed belt 67. Specifically, the powder feeding gear 63 includes a fourth coupling portion, which includes a plurality of fourth protrusions 632 distributed at intervals, and a fourth groove 633 is formed between two adjacent fourth protrusions 632. The third gear portion 661 of the second idler gear 66 is directly engaged with the drive gear 612. The third coupling portion, the developing gear 62 and the powder feeding gear 63 are all engaged with the synchronous toothed belt 67. Specifically, the third protrusion 662, the second protrusion 621 and the fourth protrusion 632 are all matched with the first groove 672. A protrusion 671 cooperates with the third groove 663, the second groove 622 and the fourth groove 633. After receiving the driving force, the third gear part 661 drives the third joint part to rotate synchronously along the direction r1, thereby driving the synchronous toothed belt 67 to rotate around the third joint part of the second idler gear 66, the second joint part of the developing gear 62 and the fourth joint part of the powder feeding gear 63, and then drives the second idler gear 66, the developing gear 62 and the powder feeding gear 63 to rotate synchronously, and finally makes the developing gear 62 drive the developing part 2 to rotate along the direction r1, and the powder feeding gear 63 drives the powder feeding part 3 to rotate along the direction r1.

[0062] Furthermore, the developing gear 62 is provided with a first baffle 623, the second idler gear 66 also includes a second baffle 664 arranged between the third gear portion 661 and the third joint portion, and the powder feeding gear 63 is provided with a third baffle 634. The bracket 14, the first baffle 623, the second baffle 664 and the third baffle 634 are used to limit the displacement of the synchronous toothed belt 67 in the left and right directions to prevent the synchronous toothed belt 67 from falling off in the left and right directions, thereby ensuring that the driving force can be transmitted to the developing gear 62 and the powder feeding gear 63 more smoothly.

[0063] In an embodiment, the first protrusion 671 on the synchronous toothed belt 67, the third protrusion 662 on the second idler 66, the second protrusion 621 on the developing gear 62, the fourth protrusion 632 on the powder feeding gear 63 can also be arranged as teeth, and the teeth arranged on the driving gear 612, the teeth arranged on the stirring gear 64, the teeth arranged on the first idler 65 and the teeth arranged on the third gear part 661 can also be protrusions distributed at intervals, as long as the driving force can be transmitted between the components.

[0064] The embodiment has the following beneficial effects: the synchronous toothed belt 67 is arranged to realize the same rotating direction of the developing gear 62 and the powder feeding gear 63 and the second idler 66.

[0065] In the above embodiment, the shape of the first protrusion 671 of the synchronous toothed belt 67 is not limited here, as long as the driving force can be transmitted.

[0066] The above embodiment has the following beneficial effects:

[0067] 1. Stable operation: the stability of the synchronous toothed belt transmission is high, and the reverse rotation and shock absorption are good, thereby improving the developing / imaging quality.

[0068] 2. Long service life: the tooth shape of the synchronous toothed belt has a certain elasticity in transmission, and this characteristic can adapt to the gear meshing error and also can absorb the vibration generated during the synchronous belt transmission.

[0069] 3. Low maintenance cost: the synchronous toothed belt is not easy to slide and has small friction, thereby reducing the wear of the gear and the belt, thereby reducing the maintenance cost of the synchronous toothed belt, and further reducing the use cost of the developing cartridge.

[0070] The utility model discloses a synchronous toothed belt is arranged to transmit driving force, thereby improving the developing / imaging quality of the developing cartridge and reducing the use cost of the developing cartridge.

Claims

1. A developing cartridge, detachably mounted in an imaging device having a driving force output member, characterized in that: The developing box includes: a housing for containing carbon powder; The developing member extends in the left-right direction and is rotatably disposed in the housing for supplying the carried toner to the outside; A powder feeding member extending in the left-right direction, rotatably disposed in the housing, in contact with the developing member, and configured to evenly distribute the toner carried on the surface of the developing member; a drive assembly rotatably disposed at a longitudinal end of the housing, comprising at least a drive force receiving member having a coaxially arranged drive head and a drive gear, wherein the drive head is configured to engage with the drive force output member to receive the drive force, and the drive gear is configured to directly or indirectly drive the developing member and the powder feeding member to rotate; When the driving force receiving member drives the developing member and the powder feeding member to rotate, the developing member and the powder feeding member rotate in the same direction when viewed in the left-right direction.

2. The developing cartridge according to claim 1, wherein: The drive assembly also includes a synchronous toothed belt, a developing gear and a powder feeding gear. The developing gear is installed at the longitudinal end of the developing part, and the powder feeding gear is installed at the longitudinal end of the powder feeding part. The synchronous toothed belt cooperates with at least one of the developing gear and the powder feeding gear.

3. The developing cartridge according to claim 2, wherein: The developing box also includes a stirring member rotatably arranged in the shell, and the driving assembly also includes a stirring gear and a first idler wheel, the stirring gear is installed at the longitudinal end of the stirring member, the first idler wheel is installed at the longitudinal end of the shell, the first idler wheel includes a first gear portion and a second gear portion coaxially arranged, the first gear portion is engaged with the driving force receiving member, and the second gear portion is engaged with the stirring gear.

4. The developing cartridge according to claim 2, wherein: The driving assembly further includes a second idler wheel, which cooperates with the driving gear and the synchronous toothed belt at the same time. The synchronous toothed belt rotates around the second idler wheel and the developing gear, and the powder feeding gear is meshed with the driving gear.

5. The developing cartridge according to claim 2, wherein: The driving assembly further comprises a second idler wheel, which cooperates with the driving gear and the synchronous toothed belt at the same time, and the synchronous toothed belt rotates around the second idler wheel, the developing gear and the powder feeding gear.

6. The developing cartridge according to claim 2, wherein: The powder feeding gear cooperates with the driving gear and the synchronous toothed belt at the same time, and the synchronous gear belt rotates around the powder feeding gear and the developing gear.

7. The developing cartridge according to claim 4 or 5, wherein: The second idler gear includes a third gear portion and a third coupling portion that are coaxially arranged. The third gear portion is engaged with the driving gear to receive the driving force, and the third coupling portion is engaged with the synchronous toothed belt.

8. The developing cartridge according to claim 6, wherein: The powder feeding gear includes a fourth gear portion and a fourth coupling portion which are coaxially arranged. The fourth gear portion is engaged with the driving gear to receive the driving force, and the fourth coupling portion is matched with the synchronous toothed belt.

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