Toner cartridge replenishment mechanism

Abstract

The present invention relates to a toner replenishing mechanism for a toner cartridge, comprising a toner cartridge body having a toner bin, and a powder replenishing box matched and docked above the toner bin, wherein a powder inlet is arranged on the docking surface of the toner bin, and a powder outlet opposite to the powder inlet is arranged on the docking surface of the powder replenishing box; a powder outlet assembly for bringing toner to the powder outlet is arranged in the powder replenishing box, and the powder outlet assembly is connected to a motion mechanism in the toner cartridge body through a reduction gear set. The toner cartridge toner replenishing mechanism facilitates the powder replenishing operation and can effectively control the powder supply quality and powder supply amount.

Description

Technical Field

[0001] The invention relates to the technical field of printers, and in particular to a toner replenishing mechanism for a toner cartridge. Background Art

[0002] The toner cartridge mechanism used in existing laser printers is mainly divided into an integrated toner cartridge structure and a split toner cartridge structure. The integrated toner cartridge structure integrates both the imaging unit and the developing unit into the toner cartridge. After using up the toner in the toner cartridge, the user needs to replace the toner cartridge as a whole or refill it by themselves. Since there are many internal components in the toner cartridge, the replacement cost is high. If the user refills the toner cartridge by himself, it is easy to cause problems such as powder jamming or powder leakage during printing due to improper operation, which will affect the printing effect or contaminate the printed image. The existing split toner cartridge structure usually separates the powder bin and the developing roller into one component. When the toner in the powder bin is used up, the powder bin and the developing roller need to be replaced at the same time, and the replacement cost is high. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a toner replenishing mechanism for a toner cartridge, which is convenient for replenishing powder and can effectively control the powder supply quality and powder supply amount.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a toner replenishing mechanism for a toner cartridge, comprising a toner cartridge body having a toner bin, characterized in that: it also comprises a toner replenishing box matched and docked above the toner bin, a toner inlet is arranged on the docking surface of the toner bin, and a powder outlet opposite to the powder inlet is arranged on the docking surface of the toner replenishing box;

[0005] The powder replenishing box is provided with a powder outlet assembly for bringing toner to the powder outlet, and the powder outlet assembly is transmission-connected with the action mechanism in the toner cartridge body through a reduction gear set.

[0006] Preferably, the reduction gear group includes a transmission gear group and a clutch gear group transmission-connected to the transmission gear group, the input end of the transmission gear group is transmission-connected to an action mechanism in a toner cartridge body, the clutch gear group includes a first ratchet and a second ratchet which can be clutched and meshed, the first ratchet is transmission-disposed to the output end of the transmission gear group, and the second ratchet is connected to a powder outlet assembly.

[0007] In order to reduce the number of components of the reduction gear set, reduce the overall volume of the toner cartridge, and simplify the avoidance structure of the meshing gear in the reduction gear set, the clutch gear set further includes a swing arm disposed outside the first ratchet, and the first end of the swing arm is rotatably connected;

[0008] The output end of the transmission gear set is a cam, the second end of the swing arm is mounted on the cam and can swing back and forth with the rotation of the cam, the first end of the swing arm and the first ratchet are matched with a pushing component that can drive the first ratchet to engage and disengage with the second ratchet, and the first end of the swing arm is also sleeved with an elastic member that makes the swing arm have a reset tendency.

[0009] In order to simultaneously realize the pushing effect of the swing arm on the first ratchet in the circumferential direction and the pushing effect in the axial direction, the pushing assembly includes a first pushing member arranged on the swing arm and a second pushing member arranged on the first ratchet;

[0010] The first pushing member is an arc-shaped member arranged on the outer periphery of the rotation position of the swing arm, and the second pushing member is an arc-shaped member arranged on the outer side of the first ratchet along the circumferential direction. The first pushing member and the second pushing member are matched and docked along the circumferential direction, and the docking end surface of one end of the second pushing member is an inclined surface so that the first ratchet can slide inward and outward along the axial direction under the drive of the swing arm.

[0011] In order to prevent the toner in the powder replenishing box from falling, deteriorating, or being contaminated before the powder replenishing box is installed, a sealing member is rotatably provided at one end of the powder replenishing box corresponding to the position of the powder outlet, and a sealing outlet is provided on the sealing member that can be rotated to the position of the powder outlet;

[0012] The first ratchet and the second ratchet are arranged in the sealing member, and the two ends of the elastic member are respectively connected to the member of the sealing member and the swing arm.

[0013] In order to prevent the toner in the powder replenishing box from falling, deteriorating or being contaminated before the powder replenishing box is installed, a sealing member capable of opening and closing the powder outlet is provided at a position corresponding to the powder outlet in the powder replenishing box, and a sealing outlet matching the powder outlet is provided on the sealing member.

[0014] Preferably, a cylindrical installation cavity is provided in the powder replenishing box, the sealing member is rotatably arranged in the installation cavity, and the sealing outlet on the sealing member can be rotated to a position opposite to the powder outlet.

[0015] Optionally, the reduction ratio of the reduction gear set is 80:5 to 90:5.

[0016] The structure is simple. The powder outlet assembly comprises a lever and a screw extending along the length direction of the powder replenishing box. The lever and the screw are transmission-connected. One of the lever and the screw is connected to a reduction gear set.

[0017] Preferably, a powder inlet cover capable of opening and closing the powder inlet is provided on the docking surface of the toner bin, and a powder outlet cover capable of opening and closing the powder outlet is provided on the docking surface of the powder replenishing box.

[0018] Compared with the prior art, the advantages of the present invention are as follows: the toner replenishing mechanism of the toner cartridge in the present invention is firstly provided with an additional powder replenishing box independent of the toner bin. When in use, it is only necessary to add toner into the powder replenishing box, and the powder replenishing box can be connected with the powder inlet on the toner bin through the powder outlet, thereby realizing the replenishment of toner into the toner bin. Since the powder replenishing box is detachably docked with respect to the toner bin, and the powder replenishing box is not associated with other components in the toner cartridge body, the toner added into the powder replenishing box will not affect the toner supply and use of the toner bin during the printing process. This makes it convenient for the user to disassemble the powder replenishing box from the toner bin and add toner to the powder replenishing box by himself, and the requirement for the user to replenish toner is low. On the other hand, even if the powder replenishing box is directly replaced, the cost is low.

[0019] On this basis, a powder outlet assembly is provided in the powder replenishing box to facilitate the supply of toner to the toner bin. Through the action of the reduction gear group, not only the cost of setting up a driving mechanism specifically for the powder outlet assembly can be saved, but also the occupied space in the printer casing can be reduced. At the same time, the reduction gear group can effectively ensure the rotation of the powder outlet assembly. On the one hand, it can avoid the toner in the powder replenishing box from being stirred too quickly and causing the toner to deteriorate. On the other hand, it can effectively control the delivery of a reasonable amount of toner to the toner bin to improve the printing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of a toner replenishing mechanism of a toner cartridge in an embodiment of the present invention.

[0021] Figure 2 It is a three-dimensional exploded view of the toner replenishing mechanism of the toner cartridge in the embodiment of the present invention.

[0022] Figure 3 4 is a cross-sectional view of a toner replenishing mechanism of a toner cartridge in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the accompanying drawings.

[0024] like Figures 1 to 3 As shown, the toner replenishing mechanism of the toner cartridge in this embodiment is arranged in the housing of the printer and comprises a toner cartridge body 100, a toner replenishing box 2, a toner output assembly 3, and a reduction gear set.

[0025] The toner cartridge body 100 may adopt various types of toner cartridge bodies 100 in the prior art, such as the toner cartridge body 100 including a photosensitive drum, a developing roller, a transfer roller, a charging roller, and a toner bin 1 disposed above the developing roller. The toner cartridge body 100 in this embodiment extends as a whole in the left-right direction.

[0026] The powder replenishing box 2 is connected to the top of the toner bin 1, and is used to replenish toner into the toner bin 1. The powder replenishing box 2 in this embodiment matches the shape of the toner cartridge body 100 and is in an elongated shape as a whole. The interior of the powder replenishing box 2 has a cavity for accommodating toner. In order to facilitate assembly and opening to replenish toner, the powder replenishing box 2 includes a box body with an upward opening and a box cover covering the opening, and toner can be added and replenished into the box body by opening the box cover. The housing of the printer is provided with an opening for the toner cartridge body 100 and the powder replenishing box 2 to be installed in the housing.

[0027] In addition, in order to facilitate accurate docking of the powder replenishing box 2 on the toner bin 1, guide grooves 12 and guide members 23 are matched and arranged on the powder replenishing box 2 and the toner bin 1. In this embodiment, the guide grooves 12 are arranged on the docking surface of the toner bin 1, and the guide members 23 are arranged on the docking surface of the powder replenishing box 2, and the guide members 23 can be placed in the guide grooves 12 and move along the guide direction of the guide grooves 12.

[0028] In order to transport the toner in the powder replenishing box 2 to the toner bin 1, a powder inlet 11 is provided on the docking surface of the toner bin 1, and a powder outlet 21 is provided on the docking surface of the powder replenishing box 2 to be opposite to the powder inlet 11 on the toner bin 1. When the powder replenishing box 2 is docked and installed on the toner bin 1, the powder outlet 21 on the powder replenishing box 2 is matched and connected with the powder inlet 11 on the toner bin 1 to achieve communication. In order to ensure the sealing during the toner conveying process, a sealing gasket is provided around the powder outlet 21 on the docking surface of the powder replenishing box 2, and a sealing gasket is also provided around the powder inlet 11 on the docking surface of the toner bin 1, and the sealing gasket on the docking surface of the powder replenishing box 2 and the sealing gasket on the docking surface of the toner bin 1 can match and fit tightly. Since the powder replenishing box 2 is arranged above the toner bin 1, the upper surface of the toner bin 1 and the lower surface of the powder replenishing box 2 constitute a docking surface, so that the powder outlet 21 of the powder replenishing box 2 is arranged on the bottom surface of the powder replenishing box 2, and the powder inlet 11 of the toner bin 1 is arranged on the upper surface of the toner bin 1. When the powder outlet 21 and the powder inlet 11 are connected, the toner in the powder replenishing box 2 can fall into the toner bin 1 by its own gravity.

[0029] In order to avoid the contamination, quality change and leakage of the toner in the powder replenishing box 2 when it is not installed, and also to avoid the contamination of the space in the toner bin 1, or the contamination and quality change of the toner in the toner bin 1 when the powder replenishing box 2 is removed. In this embodiment, a powder inlet cover 7 capable of opening and closing the powder inlet 11 is provided on the docking surface of the toner bin 1, and a powder outlet cover 8 capable of opening and closing the powder outlet 21 is provided on the docking surface of the powder replenishing box 2. The powder inlet cover 7 and the powder outlet cover 8 can be opened and closed by manual toggling, but this method increases the operation steps of the user and reduces the installation convenience of the powder replenishing box 2. In this embodiment, a first push plate 24 is provided on the powder replenishing box 2, and a first plate body 71 capable of being pushed by the first push plate 24 to open the powder inlet 11 is provided on the powder inlet cover 7. A second push plate 13 is provided on the toner bin 1, and a second plate body 81 capable of being pushed by the second push plate 13 to open the powder outlet 21 is provided on the powder outlet cover 8. In this way, the powder outlet cover 8 and the powder inlet cover 7 can be opened automatically during the process of assembling the toner box 2 on the toner bin 1 .

[0030] The powder inlet cover 7 and the powder outlet cover 8 move in a direction of relative separation to open the powder inlet 11 and the powder outlet 21. Specifically, an upper concave area is formed on the front part of the lower surface of the powder replenishing box 2 corresponding to the area after the powder inlet cover 7 is opened, and the first push plate 24 is extended downwardly on the upper concave area, and the first plate body 71 is provided on the upper surface of the powder inlet cover 7. A second push plate 13 that will not be touched by the first push plate 24 is extended upward on the upper surface of the front part of the toner bin 1, and a second plate body 81 that can match and touch the second push plate 13 is extended downward on the powder outlet cover 8. In this way, when the powder replenishing box 2 is pushed from front to back and installed on the toner bin 1, the first push plate 24 opens the powder inlet 11 by pushing the first plate body 71 backward, and the second push plate 13 opens the powder outlet 21 by blocking the second plate body 81 forward. In this process, the powder inlet cover 7 moves backward, and the powder outlet cover 8 moves forward. When the toner replenishing box 2 is assembled in place on the toner bin 1 , the powder inlet 11 and the powder outlet 21 are both in an open state, and the powder inlet 11 and the powder outlet 21 are connected to each other.

[0031] At the same time, in order to enable the powder inlet cover 7 to automatically cover the powder inlet 11 after the powder replenishing box 2 is removed, thereby preventing impurities from entering the toner bin 1 and the toner in the powder replenishing box 2 from falling out. In this embodiment, the powder outlet cover 8 has a tendency to cover the powder outlet 21 and is elastically connected to the powder replenishing box 2, and the powder inlet cover 7 has a tendency to cover the powder inlet 11 and is elastically connected to the toner bin 1.

[0032] Furthermore, before the powder replenishing box 2 is installed on the toner bin 1, in order to effectively ensure the quality of the toner in the powder replenishing box 2 and prevent the toner in the powder replenishing box 2 from falling from the powder outlet 21. In this embodiment, a sealing member 6 is movably provided in the powder replenishing box 2 corresponding to the powder outlet 21, and the sealing member 6 opens and closes the powder outlet 21 by movement. The sealing member 6 can adopt a sealing sheet structure and be installed in the powder replenishing box 2 by moving forward and backward. In this embodiment, the sealing member 6 adopts a cylindrical structure and is rotatably installed in the powder replenishing box 2, so that the closeness between the sealing member 6 and the bin wall of the powder replenishing box 2 can be ensured, and the sealing effect is improved.

[0033] Specifically, in this embodiment, a cylindrical installation cavity 22 is provided in one end of the powder replenishing box 2, and the axis of the installation cavity 22 extends in a horizontal direction. The powder outlet 21 of the powder replenishing box 2 in this embodiment is provided on the bottom surface of the installation cavity 22. The sealing member 6 is cylindrical and is rotatably provided in the installation cavity 22 in close contact with the cavity wall of the installation cavity 22. The axis of the sealing member 6 is also provided horizontally, so that when the sealing member 6 rotates in the installation cavity 22, the sealing property between the outer wall of the sealing member 6 and the inner wall of the installation cavity 22 can be always maintained. A sealing outlet 61 that can be rotated to the position of the powder outlet 21 is provided on the side wall of the sealing member 6. The sealing member 6 can be opened by other driving modes after the powder replenishing box 2 is installed on the toner bin 1. For example, a special driver can be provided to drive the sealing member 6 to rotate. For example, the sealing member 6 can also be provided with a transmission arrangement with a cover covering the opening of the housing, so that when the cover is closed, the sealing member 6 can be driven to rotate so that the sealing outlet 61 rotates to the position of the powder outlet 21. The sealing member 6 in this embodiment is in driving connection with the reduction gear set, which can reduce the cost and the volume of the entire toner cartridge.

[0034] When the toner cartridge is working, there are requirements for the quality of the toner and the supply of the toner. The powder outlet assembly 3 is used to ensure the quality and quantity of the toner supplied to the toner bin 1. The powder outlet assembly 3 in this embodiment is arranged in the powder replenishing box 2, and is used to bring the toner to the powder outlet 21. The powder outlet assembly 3 may include a lever 31 and a screw 32 extending along the length direction of the powder replenishing box 2. The first toner groove and the second toner groove are respectively arranged in the powder replenishing box 2 corresponding to the lever 31 and the screw 32, wherein the cross section of the second toner groove is an inverted cone, which can improve the conveying capacity of the screw 32 for toner. The aforementioned installation cavity 22 is located at the end of the second toner groove and is connected to the bottom of the second toner groove. The screw 32 extends into the installation cavity 22 and can convey the toner to the position of the powder outlet 21 by rotation. The lever 31 can play a role in stirring the toner in the powder replenishing box 2 and transferring the toner to the second toner slot, which can prevent the toner from solidifying and ensure the uniformity of the toner delivery amount. In addition, due to the characteristics of the toner itself, the stirring speed of the toner by the lever 31 cannot be too fast to prevent the toner from deteriorating due to excessive stirring. The ends of the lever 31 and the screw 32 are both connected to gears, and the meshing transmission of the two can be achieved through the gears at the ends of the lever 31 and the screw 32. In addition, as needed, a special driving mechanism can be specially set for the powder outlet assembly 3 to drive the powder outlet device to work, and the driving mechanism can be connected to one of the lever 31 and the screw 32, so that the lever 31 and the screw 32 can be driven simultaneously. Since it is costly to set up an additional driving mechanism and it will lead to an increase in the overall volume of the toner cartridge, in this embodiment, one of the lever 31 and the screw 32 is connected to the action mechanism in the toner cartridge body 100 by transmission. In this embodiment, the action mechanism in the toner cartridge body 100 is a photosensitive drum, and the screw 32 is used for transmission connection with the photosensitive drum. Since the photosensitive drum rotates at a high speed, if the screw 32 is connected to the photosensitive drum without deceleration, the toner conveying amount of the screw 32 will be large, and the stirring speed of the toner by the lever 31 will be too fast, causing the toner to deteriorate. Therefore, the screw 32 in this embodiment is connected to the photosensitive drum by transmission through a reduction gear set.

[0035] The reduction gear set in this embodiment includes a transmission gear set 4 and a clutch gear set 5 connected to the transmission gear set 4. The clutch gear set 5 includes a first ratchet 51 and a second ratchet 52 that can be engaged and disengaged. The clutch gear set 5 also includes a swing arm 53 that is driven by the first ratchet 51. The swing arm 53 is arranged to be driven by the output end of the transmission gear set 4. The second ratchet 52 is connected to the screw 32 in the powder output assembly 3. Specifically, the second ratchet 52 is provided with a waist hole that matches the cross section of the end of the screw 32. The end of the screw 32 extends into the waist hole of the second ratchet 52 to achieve the connection between the two. The first ratchet 51 and the second ratchet 52 are both matched and arranged in the outer end of the seal 6. A step surface is arranged in the seal 6 to achieve the axial limit of the first ratchet 51 and the second ratchet 52.

[0036] The transmission gear set 4 is extended between the photosensitive drum and the powder outlet assembly 3 , the input end gear of the transmission gear set 4 is connected to the photosensitive drum in the toner cartridge body 100 , and the output end of the transmission gear set 4 is a cam 41 .

[0037] A mounting plate 9 is fixedly arranged on the end of the powder replenishing box 2 corresponding to the end of the sealing member 6, and there is a gap between the mounting plate 9 and the end surface of the powder replenishing box 2. The swing arm 53 is arranged in the space between the mounting plate 9 and the first ratchet 51. The first end of the swing arm 53 is rotatably connected to the mounting plate 9. The second end of the swing arm 53 is mounted on the cam 41 and can swing back and forth with the rotation of the cam 41. The first end of the swing arm 53 and the first ratchet 51 are matched with a pushing component that can drive the first ratchet 51 to achieve the clutch with the second ratchet 52. The first end of the swing arm 53 is also sleeved with an elastic member 54 that makes the swing arm 53 have a reset tendency. The elastic member 54 in this embodiment adopts a torsion spring sleeved on the first end of the swing arm 53. The two ends of the elastic member 54 are respectively connected to the sealing member 6 and the swing arm 53. Specifically, a member extends outward from the sealing member 6, and the elastic member 54 is connected to the member. In order to ensure the stability of the positions of the second ratchet 52 and the swing arm 53, the end of the screw rod 32 extends to a position close to the mounting plate 9. The second ratchet 52 and the swing arm 53 are also sleeved outside the end of the screw rod 32 and can rotate relative to the screw rod 32.

[0038] The pushing assembly includes a first pushing member 531 disposed on the swing arm 53 and a second pushing member 511 disposed on the first ratchet 51. The first pushing member 531 is an arc-shaped member disposed on the outer periphery of the first end of the swing arm 53, and the first pushing member 531 extends toward the first ratchet 51. The second pushing member 511 is an arc-shaped member disposed on the outer surface of the first ratchet 51 along the circumferential direction, and the first pushing member 531 and the second pushing member 511 can be matched and docked along the circumferential direction, and the docking end surface of one end of the second pushing member 511 is an inclined surface so that the first ratchet 51 can slide inward and outward along the axial direction under the drive of the swing arm 53.

[0039] The clutch gear set 5 and the transmission gear set 4 in this embodiment facilitate the transmission connection between the clutch gear set 5 and the transmission gear set 4 through the overlapping structure of the swing arm 53 and the cam 41, and there is no need to set up an additional avoidance structure to achieve the meshing connection between the two. The structure is simpler, the installation is more convenient, and the installation space in the casing is reduced.

[0040] The toner replenishing mechanism for the toner cartridge is used as follows: the toner replenishing box 2 in this embodiment can be assembled to the toner bin 1 of the toner cartridge body 100 outside the housing, and then installed in the housing together with the toner cartridge body 100, or the toner cartridge body 100 can be installed in the housing first, and then the toner replenishing box 2 can be docked on the toner bin 1 to achieve the installation of the toner replenishing box 2 in the housing.

[0041] When the toner cartridge 2 is not installed on the toner bin 1 or is partially installed on the toner bin 1 but no printing work has been performed, the elastic member 54 presses down the swing arm 53, and the first pusher 531 on the swing arm 53 has no pushing effect on the second pusher 511 on the first ratchet 51, and the first ratchet 51 and the second ratchet 52 are in a separated state. At the same time, the sealing outlet 61 on the sealing member 6 is in a staggered position with the toner outlet 21.

[0042] When the toner replenishing box 2 is assembled on the toner bin 1 and the toner cartridge body 100 starts printing, the photosensitive drum rotates, thereby driving the output cam 41 in the transmission gear set 4 to rotate. When the protruding part of the cam 41 gradually rotates toward the swing arm 53, the swing arm 53 is lifted upward as the cam 41 pushes it. The first pushing member 531 pushes the inclined surface of the second pushing member 511 on the first ratchet 51. In this way, the first pushing member 531 pushes the first ratchet 51 toward the second ratchet 52 while pushing the second pushing member 511 to rotate circumferentially, thereby realizing the engagement of the first ratchet 51 and the second ratchet 52. As the swing arm 53 continues to rotate, the first ratchet 51 is pushed to drive the second ratchet 52 to rotate, thereby realizing the rotation drive of the screw 32. The screw 32 transports the toner in the toner replenishing box 2 to the position of the powder outlet 21. When the swing arm 53 rotates, the seal 6 is driven to rotate under the action of the elastic member 54, so that the seal 6 stops rotating when the seal outlet 61 is connected to the powder outlet 21. As the swing arm 53 rotates, the elastic member 54 is gradually compressed.

[0043] When the output cam 41 in the transmission gear set 4 rotates past the farthest point of the driving swing arm 53, the swing arm 53 swings back under the reset action of the elastic member 54, and the first pusher 531 on the swing arm 53 pushes one end of the non-inclined surface of the second pusher 511, thereby driving the first ratchet 51 to rotate and separate from the second ratchet 52. At this time, the screw 32 can no longer be driven to rotate, and the toner cannot be output into the toner bin 1. In addition, the elastic member 54 also drives the seal 6 to rotate, so that the seal 6 rotates to the position where the sealing outlet 61 and the powder outlet 21 intersect, thereby closing the powder outlet 21 and stopping the toner output.

[0044] Through the above process, intermittent output of toner is achieved, which greatly reduces the stirring speed and output amount of toner, meets the normal toner quantity demand of the toner bin 1, and avoids the toner from being over-stirred and deteriorated.

[0045] The reduction ratio of the reduction gear set can reach 80:5 to 90:5. The reduction ratio of the reduction gear set in this embodiment is 83:5.

[0046] The toner replenishing mechanism of the toner cartridge in the present invention firstly provides an additional powder replenishing box 2 independently of the toner bin 1. When in use, it is only necessary to add toner into the powder replenishing box 2. The powder replenishing box 2 can be connected with the powder inlet 11 on the toner bin 1 through the powder outlet 21, thereby realizing the replenishment of toner into the toner bin 1. Since the powder replenishing box 2 is detachably docked with respect to the toner bin 1, and the powder replenishing box 2 is not associated with other components in the toner cartridge body 100, the toner addition in the powder replenishing box 2 will not affect the toner supply and use of the toner bin 1 during the printing process. In this way, it is convenient for the user to disassemble the powder replenishing box 2 from the toner bin 1 and add toner to the powder replenishing box 2 by himself, and the requirement for the user to replenish toner is low. On the other hand, even if the powder replenishing box 2 is directly replaced, the cost is also low.

[0047] On this basis, a powder outlet assembly 3 is provided in the powder replenishing box 2 to facilitate the supply of toner to the toner bin 1. Through the effect of the reduction gear set, not only can the cost of setting a driving mechanism specifically for the powder outlet assembly 3 be saved, but also the occupied space in the printer housing can be reduced. At the same time, the reduction gear set can effectively ensure the rotation of the powder outlet assembly 3, on the one hand, avoiding the toner in the powder replenishing box 2 from being stirred too fast and causing the toner to deteriorate, and on the other hand, it can effectively control the reasonable amount of toner delivered to the toner bin 1 to improve the printing effect. In the specification and claims of the present invention, terms indicating directions, such as "front", "back", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A toner replenishing mechanism for a toner cartridge, comprising a toner cartridge body (100) having a toner bin (1), characterized in that: It also includes a powder replenishing box (2) that is matched and docked above the toner bin (1), wherein a powder inlet (11) is provided on the docking surface of the toner bin (1), and a powder outlet (21) opposite to the powder inlet (11) is provided on the docking surface of the powder replenishing box (2); A powder outlet assembly (3) for bringing toner to a powder outlet (21) is provided in the powder supply box (2); the powder outlet assembly (3) is connected to the action mechanism in the toner cartridge body (100) through a reduction gear set; The reduction gear set comprises a transmission gear set (4) and a clutch gear set (5) transmission-connected to the transmission gear set (4); the input end of the transmission gear set (4) is transmission-connected to an action mechanism in a toner cartridge body (100); the clutch gear set (5) comprises a first ratchet (51) and a second ratchet (52) capable of being clutched and meshed; the first ratchet (51) is transmission-connected to the output end of the transmission gear set (4); and the second ratchet (52) is connected to a powder outlet assembly (3); The clutch gear set (5) further comprises a swing arm (53) arranged outside the first ratchet (51), and a first end of the swing arm (53) is rotatably connected; The output end of the transmission gear set (4) is a cam (41), the second end of the swing arm (53) is mounted on the cam (41) and can swing back and forth with the rotation of the cam (41), the first end of the swing arm (53) and the first ratchet wheel (51) are matched with a pushing component that can drive the first ratchet wheel (51) to achieve clutch with the second ratchet wheel (52), and the first end of the swing arm (53) is also sleeved with an elastic member (54) that makes the swing arm (53) have a reset tendency; The pushing assembly comprises a first pushing member (531) arranged on the swing arm (53) and a second pushing member (511) arranged on the first ratchet wheel (51); The first pushing member (531) is an arc-shaped member arranged on the outer periphery of the rotation position of the swing arm (53), and the second pushing member (511) is an arc-shaped member arranged on the outer side of the first ratchet (51) along the circumferential direction. The first pushing member (531) and the second pushing member (511) are matched and docked along the circumferential direction, and the docking end surface of one end of the second pushing member (511) is an inclined surface so that the first ratchet (51) can slide inward and outward along the axial direction under the drive of the swing arm (53).

2. The toner cartridge replenishing mechanism according to claim 1, characterized in that: A sealing member (6) is rotatably provided in one end portion of the powder replenishing box (2) at a position corresponding to the powder outlet (21), and a sealing outlet (61) is provided on the sealing member (6) and can be rotated to the position of the powder outlet (21); The first ratchet (51) and the second ratchet (52) are arranged in the sealing member (6), and the two ends of the elastic member (54) are respectively connected to the sealing member (6) and the swing arm (53).

3. The toner replenishing mechanism for a toner cartridge according to claim 1 or 2, characterized in that: A sealing member (6) capable of opening and closing the powder outlet (21) is arranged at a position corresponding to the powder outlet (21) in the powder replenishing box (2), and a sealing outlet (61) matching the powder outlet (21) is arranged on the sealing member (6).

4. The toner replenishing mechanism for a toner cartridge according to claim 3, characterized in that: A cylindrical installation cavity (22) is arranged in the powder replenishing box (2), and the sealing member (6) is rotatably arranged in the installation cavity (22). The sealing outlet (61) on the sealing member (6) can be rotated to a position opposite to the powder outlet (21).

5. The toner replenishing mechanism for a toner cartridge according to claim 1 or 2, characterized in that: The reduction ratio of the reduction gear set is 80:5 to 90:

5.

6. The toner replenishing mechanism for a toner cartridge according to claim 1, characterized in that: The powder outlet assembly (3) comprises a lever (31) and a screw (32) extending along the length direction of the powder replenishing box (2); the lever (31) and the screw (32) are transmission-connected; and one of the lever (31) and the screw (32) is connected to a reduction gear set.

7. The toner replenishing mechanism for a toner cartridge according to claim 1, characterized in that: A powder inlet cover (7) capable of opening and closing the powder inlet (11) is arranged on the docking surface of the toner bin (1), and a powder outlet cover (8) capable of opening and closing the powder outlet (21) is arranged on the docking surface of the powder replenishing box (2).

Images