Automatic powder replenishing device for toner cartridge

Abstract

The present invention relates to the technical field of printer powder replenishing devices, and specifically to an automatic powder replenishing device for a toner cartridge, comprising a base, a storage box welded on the top of the base, a bracket welded on the top outer wall of the storage box, and a filling mechanism for filling the toner in a powder bottle into the storage box, the filling mechanism being arranged on the base, and the filling mechanism comprising a filling cylinder. In the present invention, the filling mechanism is arranged so that the gear ring drives the spikes to rotate, thereby avoiding the situation where the toner is blocked at the bottle mouth of the powder bottle. At the same time, wedge block 2 and wedge block 1 are intermittently engaged and staggered, so that the filling cylinder drives the powder bottle to bump up and down, further promoting the powder dropping effect, and in the process of the filling cylinder moving up and down, the two clamping blocks can intermittently squeeze the powder bottle, further improving the powder dropping effect, reducing the manual steps, improving the work efficiency, and avoiding the spilling of toner.

Description

Technical Field

[0001] The invention belongs to the technical field of printer toner replenishing devices, and in particular relates to an automatic toner replenishing device for a toner box. Background Art

[0002] The main function of the toner cartridge in the printer is to collect and store the printer's toner and transfer the toner to the printing paper during the printing process. When the toner in the printer's toner cartridge is exhausted, it is usually necessary to replace it with a new one or manually replenish the toner.

[0003] When manually replenishing toner, you need to puncture the sealing film of the powder bottle first, and then insert the mouth of the powder bottle into the powder filling port of the toner cartridge. At the same time, in order to ensure that the toner can smoothly enter the toner cartridge, you need to knock or squeeze the powder bottle.

[0004] However, the above powder replenishing process is not only cumbersome to operate and has low work efficiency, but also easily causes carbon powder to float out when poking the film and squeezing the powder bottle. In addition, during the powder replenishing process, the amount of carbon powder added cannot be observed, which easily leads to excessive addition of carbon powder and overflow. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the background technology and to propose an automatic toner replenishing device for a toner cartridge.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A toner cartridge automatic powder replenishing device comprises a base, a material storage box is welded on the top of the base, a bracket is welded on the top outer wall of the material storage box, and further comprises:

[0008] A filling mechanism is used to fill the carbon powder in the powder bottle into the material storage box, the filling mechanism is arranged on the base, the filling mechanism includes a filling cylinder, the filling cylinder is slidably plugged on the outer wall of the bracket, a feeding tube is welded on the outer wall of the bottom of the filling cylinder, the feeding tube is slidably plugged on the top of the material storage box, a transmission chamber is provided at the transition between the filling cylinder and the feeding tube, a filter plate is fixed on the inner wall of the filling cylinder on one side close to the transmission chamber, a gear ring is rotatably plugged on the outer wall of the filter plate through a rotating shaft, the gear ring is located in the transmission chamber, a spike is welded on the top of the rotating shaft of the gear ring, and a special-shaped groove is provided at the bottom end of the rotating shaft of the gear ring;

[0009] A powder replenishing mechanism, used for injecting the toner in the storage box into the machine powder box, and the powder replenishing mechanism is arranged on the base;

[0010] And a weighing mechanism is used to weigh the toner added in the toner box, and the weighing mechanism is arranged on the base.

[0011] In the above-mentioned automatic powder replenishing device for a toner cartridge, a motor is welded on the outer wall of the filling cylinder, the main shaft of the motor passes through the transmission chamber, a gear is welded on the main shaft section of the motor located in the transmission chamber, the gear and the gear ring are meshed with each other, a wedge block 2 is welded on the main shaft end of the motor, a wedge block 1 is welded on the top outer wall of the storage box, the wedge block 1 is matched with the wedge block 2, and a pair of symmetrically distributed travel grooves are opened on the outer walls of the bracket on both sides of the filling cylinder.

[0012] In the above-mentioned automatic powder replenishing device for a toner cartridge, the top ends of a pair of the travel grooves gradually approach each other, and a pair of symmetrically distributed clamping blocks are slidably inserted on the outer wall of the filling cylinder. A spring is welded between the outer wall of each clamping block and the outer wall of the filling cylinder, and a sliding column is welded on the outer wall of each clamping block, and the sliding column is slidably inserted in the travel groove.

[0013] In the above-mentioned automatic powder replenishing device for a toner cartridge, a rubber ring is bonded to the top outer wall of the filling cylinder, and the inner diameter of the rubber ring is smaller than the outer diameter of the powder bottle.

[0014] In the above-mentioned automatic powder replenishing device for a toner cartridge, the powder replenishing mechanism includes a screw, a discharge pipe is welded at the bottom of the storage box, a screw is rotatably inserted in the discharge pipe, a special-shaped rod is welded on the top outer wall of the screw, and the special-shaped rod is adapted to the special-shaped groove.

[0015] In the above-mentioned automatic toner replenishing device for a toner cartridge, a stirring rod is welded on the top outer wall of the screw rod, the stirring rod is in contact with the inner wall of the material storage box, and an observation window is provided on the top outer wall of the material storage box.

[0016] In the above-mentioned automatic powder replenishing device for a toner cartridge, the weighing mechanism includes a support plate, which is slidably inserted on the outer wall of the base, and a spring 2 is welded between the outer wall of the support plate and the outer wall of the base, and a plurality of limit columns are welded on the top outer wall of the support plate, and the limit columns can support the toner cartridge, a pair of symmetrically distributed sealing plates are slidably inserted on the outer wall of the discharge pipe, and a dust cover is slidably sleeved on the outer wall of the discharge pipe.

[0017] In the above-mentioned automatic powder replenishing device for a toner cartridge, the dust cover is located below the sealing plate, a pair of symmetrically distributed connecting rods are rotatably plugged into the outer wall of the dust cover, and one end of each connecting rod away from the dust cover is rotatably plugged into the outer wall of the sealing plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. Through the filling mechanism, the gear ring drives the spikes to rotate, so as to avoid the situation that the carbon powder is blocked at the bottle mouth of the powder bottle. At the same time, the wedge block 2 and the wedge block 1 are intermittently engaged and staggered, so that the filling cylinder drives the powder bottle to bump up and down, further promoting the powder dropping effect. In the process of the filling cylinder moving up and down, the two clamping blocks can intermittently squeeze the powder bottle, further improving the powder dropping effect, reducing manual steps, improving work efficiency, and avoiding the spilling of carbon powder;

[0020] 2. Through the setting of the weighing mechanism, as the weight of the toner in the toner box increases, the second spring is gradually compressed, causing the dust cover that has lost its support to gradually move downward, and then the two sealing plates gradually approach each other. When the toner box is replenished with enough toner, the toner box moves downward to a state of being separated from the dust cover. At the same time, the two sealing plates close the discharge pipe, so that the toner discharge is automatically stopped when the toner is replenished. There is no need for manual monitoring, which further improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a three-dimensional cross-sectional schematic diagram of the filling tube of the present invention.

[0023] Figure 3 It is a three-dimensional cross-sectional schematic diagram of a material storage box of the present invention.

[0024] Figure 4 for Figure 3 A magnified view of the structure at A.

[0025] Figure 5 It is a three-dimensional schematic diagram of the screw of the present invention.

[0026] Figure 6 It is a three-dimensional schematic diagram of the working state of the overall structure of the present invention.

[0027] Figure 7 It is a plan view of the overall structure of the present invention in working state.

[0028] Figure 8 for Figure 7 Enlarged view of the structure at B.

[0029] In the figure: 1. base; 11. material storage box; 12. observation window; 13. discharge pipe; 14. wedge block 1; 15. bracket; 16. travel groove; 2. filling cylinder; 21. discharge pipe; 22. transmission chamber; 23. rubber ring; 24. filter plate; 3. motor; 31. gear; 32. wedge block 2; 4. gear ring; 41. spike; 42. special-shaped groove; 5. clamping block; 51. spring 1; 52. sliding column; 6. screw; 61. stirring rod; 62. special-shaped rod; 7. sealing plate; 71. connecting rod; 72. dust cover; 8. support plate; 81. spring 2; 82. limit column; 9. machine powder box; 91. powder bottle. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] See also Figure 1-Figure 8 The present invention provides a technical solution: a toner cartridge automatic powder replenishing device, comprising a base 1, a material storage box 11 is welded on the top of the base 1, and a bracket 15 is welded on the top outer wall of the material storage box 11, characterized in that it also includes:

[0033] The filling mechanism is used to fill the carbon powder in the powder bottle 91 into the storage box 11. The filling mechanism is arranged on the base 1. The filling mechanism includes a filling cylinder 2. The filling cylinder 2 is slidably inserted on the outer wall of the bracket 15. A discharge pipe 21 is welded on the outer wall of the bottom of the filling cylinder 2. The discharge pipe 21 is slidably inserted on the top of the storage box 11. A transmission chamber 22 is provided at the transition between the filling cylinder 2 and the discharge pipe 21. A filter plate 24 is fixed on the inner wall of the filling cylinder 2 on one side close to the transmission chamber 22. A gear ring 4 is inserted on the outer wall of the filter plate 24 through a rotating shaft. The gear ring 4 is located in the transmission chamber 22. A spike 41 is welded on the top of the rotating shaft of the gear ring 4. A special-shaped groove 42 is provided on the bottom end of the rotating shaft of the gear ring 4. A motor 3 is welded on the outer wall of the filling cylinder 2. The main shaft of the motor 3 passes through the transmission chamber 22. The motor 3 is located in the transmission chamber 22. A gear 31 is welded on the main shaft section in the driving chamber 22, and the gear 31 meshes with the gear ring 4. A wedge block 2 32 is welded on the main shaft end of the motor 3, and a wedge block 14 is welded on the top outer wall of the storage box 11. The wedge block 14 is adapted to the wedge block 2 32. The bracket 15 is located on the outer wall of both sides of the filling cylinder 2 and is provided with a pair of symmetrically distributed stroke grooves 16. The top ends of the pair of stroke grooves 16 gradually approach each other. A pair of symmetrically distributed clamping blocks 5 are slidably inserted on the outer wall of the filling cylinder 2. A spring 1 51 is welded between the outer wall of each clamping block 5 and the outer wall of the filling cylinder 2. A sliding column 52 is welded on the outer wall of each clamping block 5. The sliding column 52 is slidably inserted in the stroke groove 16. A rubber ring 23 is bonded to the top outer wall of the filling cylinder 2, and the inner diameter of the rubber ring 23 is smaller than the outer diameter of the powder bottle 91.

[0034] A powder replenishing mechanism, used for injecting the toner in the storage box 11 into the machine powder box 9, and the powder replenishing mechanism is arranged on the base 1;

[0035] And a weighing mechanism is used to weigh the toner added in the toner box 9 , and the weighing mechanism is arranged on the base 1 .

[0036] In the initial state, the wedge block 14 and the wedge block 2 32 are in a buckled state, the slide post 52 is at the bottom of the travel groove 16 , and the two clamping blocks 5 are close to each other under the action of the spring 1 51 .

[0037] The filling mechanism is further explained as follows: when working, the mouth of the powder bottle 91 is unscrewed, and the powder bottle 91 is inverted and inserted into the filling cylinder 2. The powder bottle 91 stretches the rubber ring 23 so that the inner ring wall of the rubber ring 23 fits tightly with the outer wall of the powder bottle 91, which can prevent the carbon powder from flying out. When the powder bottle 91 abuts against the filter plate 24, the spike 41 cuts the sealing film of the powder bottle 91 and enters the powder bottle 91, avoiding the situation of manual film tearing, thereby improving the working efficiency. At the same time, the powder bottle 91 pushes the two clamping blocks 5 apart, and the effect of clamping the powder bottle 91 is achieved through the elastic force of the spring 1 51. Then the motor 3 is started, and the motor 3 drives the gear 31 and the wedge block 2 32 to rotate. The gear 31 drives the gear ring 4 to rotate, so that the gear ring 4 drives the spike 41 to rotate, thereby preventing the carbon powder from being blocked at the bottle mouth of the powder bottle 91. At the same time, the wedge block 2 32 and the wedge block 14 are intermittently buckled and staggered, so that the filling cylinder 2 drives the powder bottle 91 to move up The downward bump further promotes the powder falling effect. When the filling cylinder 2 rises, the clamping block 5 moves up accordingly, so that the sliding column 52 drives the two clamping blocks 5 to approach each other along the stroke groove 16, thereby further squeezing the powder bottle 91 and causing it to deform elastically. When the filling cylinder 2 moves down, the two clamping blocks 5 move away from each other, causing the powder bottle 91 to deform and recover. This reciprocating process achieves the effect of squeezing the powder bottle 91, further improving the powder dropping effect. After the carbon powder is filtered through the filter plate 24, it enters the storage box 11 along the discharge pipe 21 for storage, and then is injected into the machine powder box 9 through the powder replenishing mechanism. This not only reduces the manual operation steps and improves the work efficiency, but also avoids the situation where the carbon powder floats out. In addition, the filter plate 24 intercepts the sealing film fragments of the powder bottle 91 to prevent the sealing film fragments from entering the machine powder box 9 with the carbon powder. After working for a period of time, the filling cylinder 2 is pulled out from the base 1 and inverted, so that the intercepted material of the filter plate 24 can be poured out.

[0038] Specifically, the powder replenishing mechanism includes a screw 6, a discharge pipe 13 is welded at the bottom of the storage box 11, the screw 6 is rotatably inserted in the discharge pipe 13, a special-shaped rod 62 is welded on the top outer wall of the screw 6, the special-shaped rod 62 is adapted to the special-shaped groove 42, a stirring rod 61 is welded on the top outer wall of the screw 6, the stirring rod 61 is fitted with the inner wall of the storage box 11, and an observation window 12 is opened on the top outer wall of the storage box 11.

[0039] The above-mentioned powder replenishing mechanism is further explained: when the ring gear 4 rotates, it drives the special-shaped groove 42 to rotate, so that the special-shaped rod 62 rotates accordingly, and the special-shaped rod 62 drives the stirring rod 61 and the screw 6 to rotate. Through the set screw 6, the carbon powder in the storage box 11 can be transported to the discharge pipe 13 to avoid the carbon powder being blocked in the discharge pipe 13. Through the set stirring rod 61, the carbon powder on the inner wall of the storage box 11 can be scraped off to avoid the carbon powder remaining in the storage box 11, thereby improving the utilization rate of the carbon powder.

[0040] Supplementary explanation: The cross-section of the special-shaped rod 62 is the same as that of the special-shaped groove 42 , so that when the special-shaped rod 62 is inserted into the special-shaped groove 42 , the two can restrict each other's rotational freedom, so that the gear ring 4 can drive the special-shaped rod 62 to rotate through the special-shaped groove 42 .

[0041] Specifically, the weighing mechanism includes a support plate 8, which is slidably inserted on the outer wall of the base 1, and a spring 81 is welded between the outer wall of the support plate 8 and the outer wall of the base 1. A number of limit columns 82 are welded on the top outer wall of the support plate 8, and the limit columns 82 can support the powder box 9. A pair of symmetrically distributed sealing plates 7 are slidably inserted on the outer wall of the discharge pipe 13, and a dust cover 72 is slidably sleeved on the outer wall of the discharge pipe 13. The dust cover 72 is located below the sealing plate 7, and a pair of symmetrically distributed connecting rods 71 ​​are rotatably inserted on the outer wall of the dust cover 72, and the end of each connecting rod 71 away from the dust cover 72 is rotatably inserted on the outer wall of the sealing plate 7.

[0042] In the initial state, under the action of the dust cover 72's own weight, the dust cover 72 pulls the connecting rod 71 downward, so that the connecting rod 71 pulls the two sealing plates 7 closer to each other, so that the two sealing plates 7 close the discharge pipe 13, thereby sealing the bottom of the storage box 11. Moreover, under the action of the rubber ring 23 fitting tightly against the outer wall of the powder bottle 91, the top of the storage box 11 is also not in contact with the outside world, thereby preventing the carbon powder in the storage box 11 from contacting the outside world, thereby preventing the carbon powder from getting damp and agglomerating, and extending the service life of the carbon powder.

[0043] The above-mentioned weighing mechanism is further explained as follows: when working, the support plate 8 is pressed down, the empty machine powder box 9 is inserted between the limit columns 82, and then the powder adding port of the machine powder box 9 is aligned with the discharge pipe 13, and the support plate 8 is gradually released so that the discharge pipe 13 is inserted into the machine powder box 9. As the support plate 8 moves up and resets, the support plate 8 pushes the empty machine powder box 9 to abut against the dust cover 72. The dust cover 72 can cover the powder adding port to prevent carbon powder from floating out. At the same time, the machine powder box 9 pushes the dust cover 72 to move up, so that under the action of the connecting rod 71, the two sealing plates 7 move away from each other, so that the discharge pipe 13 is opened. At this time Under the action of the powder replenishing mechanism, the toner in the storage box 11 can enter the machine powder box 9 along the discharge pipe 13. As the weight of the toner in the machine powder box 9 increases, the spring 2 81 is gradually compressed, causing the machine powder box 9 to gradually move downward, thereby causing the dust cover 72 that has lost its support to move downward, and then causing the two sealing plates 7 to gradually approach each other. When the machine powder box 9 is replenished with enough toner, the machine powder box 9 moves downward to a state of being separated from the dust cover 72. At the same time, the two sealing plates 7 close the discharge pipe 13, thereby achieving the effect of automatically stopping the powder discharge when the toner replenishment is completed. No manual monitoring is required, further improving work efficiency.

[0044] The working principle and use process of the present invention are as follows: when replenishing powder, the support plate 8 is pressed down, and the empty machine powder box 9 is inserted between the limiting columns 82, and then the powder filling port of the machine powder box 9 is aligned with the discharge pipe 13, and the support plate 8 is gradually released so that the discharge pipe 13 is inserted into the machine powder box 9. As the support plate 8 moves up and resets, the machine powder box 9 pushes the dust cover 72 to move up, so that the two sealing plates 7 are separated from each other, so that the discharge pipe 13 is opened, the bottle mouth of the powder bottle 91 is unscrewed, and the powder bottle 91 is inserted upside down into the filling cylinder 2. The powder bottle 91 opens the rubber ring 23 so that the inner ring wall of the rubber ring 23 fits tightly with the outer wall of the powder bottle 91, which can prevent the carbon powder from flying out. When the powder bottle 91 abuts against the filter plate 24, the spike 41 cuts the sealing film of the powder bottle 91 and enters the powder bottle 91, avoiding the situation of manual film tearing and improving the work efficiency. The motor 3 is started, and under the action of the filling mechanism, the gear ring 4 drives the spike 41 to rotate, thereby preventing the carbon powder from being blocked at the bottle mouth of the powder bottle 91. At the same time, the wedge block 23 and the wedge block 32 are connected to the filter plate 24. The block 14 intermittently engages and staggers, so that the filling cylinder 2 drives the powder bottle 91 to bump up and down, further promoting the powder dropping effect, and in the process of the filling cylinder 2 moving up and down, the two clamping blocks 5 can intermittently squeeze the powder bottle 91, further improving the powder dropping effect. After the carbon powder enters the storage box 11 along the discharge pipe 21, under the action of the powder replenishing mechanism, the carbon powder enters the machine powder box 9 along the discharge pipe 13. The carbon powder amount in the storage box 11 is observed through the observation window 12, which is convenient for replacing a new powder bottle 91. As the weight of the carbon powder in the machine powder box 9 increases, the spring 2 81 is gradually compressed. Under the action of the weighing mechanism, the dust cover 72 gradually moves downward, and then the two sealing plates 7 gradually approach each other. When the machine powder box 9 is replenished with enough carbon powder, the machine powder box 9 moves down to a state of being separated from the dust cover 72. At the same time, the two sealing plates 7 close the discharge pipe 13, so as to achieve the effect of automatically stopping the powder discharge when the carbon powder replenishment is completed. No manual monitoring is required, which further improves the work efficiency.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A toner cartridge automatic toner replenishing device, comprising a base (1), a material storage box (11) welded to the top of the base (1), a bracket (15) welded to the top outer wall of the material storage box (11), characterized in that: Also includes: A filling mechanism, used for filling the carbon powder in the powder bottle (91) into the material storage box (11), the filling mechanism being arranged on the base (1), the filling mechanism comprising a filling cylinder (2), the filling cylinder (2) being slidably plugged into the outer wall of the bracket (15), a feeding tube (21) being welded on the outer wall of the bottom of the filling cylinder (2), the feeding tube (21) being slidably plugged into the top of the material storage box (11), a transmission chamber (22) being provided at the transition between the filling cylinder (2) and the feeding tube (21), a filter plate (24) being fixed on the inner wall of the filling cylinder (2) on one side close to the transmission chamber (22), a gear ring (4) being rotatably plugged into the outer wall of the filter plate (24) via a rotating shaft, the gear ring (4) being located in the transmission chamber (22), a spike (41) being welded on the top end of the rotating shaft of the gear ring (4), and a special-shaped groove (42) being provided on the bottom end of the rotating shaft of the gear ring (4); A powder replenishing mechanism, used for injecting the carbon powder in the storage box (11) into the machine powder box (9), wherein the powder replenishing mechanism is arranged on the base (1); and a weighing mechanism, used for weighing the toner added to the toner box (9), the weighing mechanism being arranged on the base (1); A motor (3) is welded to the outer wall of the filling cylinder (2), the main shaft of the motor (3) passes through the transmission chamber (22), a gear (31) is welded to the main shaft section of the motor (3) located in the transmission chamber (22), the gear (31) and the gear ring (4) are meshed with each other, a wedge block 2 (32) is welded to the end of the main shaft of the motor (3), a wedge block 1 (14) is welded to the top outer wall of the material storage box (11), the wedge block 1 (14) is matched with the wedge block 2 (32), and the bracket (1 5) A pair of symmetrically distributed travel grooves (16) are provided on the outer walls of both sides of the filling cylinder (2). The motor (3) drives the gear (31) and the second wedge (32) to rotate, and the gear (31) drives the ring gear (4) to rotate, so that the ring gear (4) drives the spike (41) to rotate, thereby preventing the carbon powder from being blocked at the bottle mouth of the powder bottle (91). At the same time, the second wedge (32) and the first wedge (14) are intermittently engaged and staggered, so that the filling cylinder (2) drives the powder bottle (91) to bump up and down; The top ends of the pair of travel grooves (16) gradually approach each other, and a pair of symmetrically distributed clamping blocks (5) are slidably inserted on the outer wall of the filling cylinder (2), a spring (51) is welded between the outer wall of each clamping block (5) and the outer wall of the filling cylinder (2), and a sliding column (52) is welded on the outer wall of each clamping block (5), and the sliding column (52) is slidably inserted in the travel groove (16).

2. The automatic toner replenishing device for a toner cartridge according to claim 1, characterized in that: A rubber ring (23) is bonded to the top outer wall of the filling cylinder (2), and the inner diameter of the rubber ring (23) is smaller than the outer diameter of the powder bottle (91).

3. The automatic toner replenishing device for a toner cartridge according to claim 1, characterized in that: The powder replenishing mechanism comprises a screw (6), a discharge pipe (13) is welded to the bottom of the material storage box (11), a screw (6) is rotatably inserted in the discharge pipe (13), and a special-shaped rod (62) is welded to the top outer wall of the screw (6), and the special-shaped rod (62) is adapted to fit the special-shaped groove (42).

4. The automatic toner replenishing device for a toner cartridge according to claim 3, characterized in that: A stirring rod (61) is welded to the top outer wall of the screw rod (6), and the stirring rod (61) is in contact with the inner wall of the material storage box (11). An observation window (12) is provided on the top outer wall of the material storage box (11).

5. The automatic toner replenishing device for a toner cartridge according to claim 3, characterized in that: The weighing mechanism comprises a support plate (8), the support plate (8) is slidably inserted on the outer wall of the base (1), a spring 2 (81) is welded between the outer wall of the support plate (8) and the outer wall of the base (1), a plurality of limit columns (82) are welded on the top outer wall of the support plate (8), the limit columns (82) can support the powder box (9), a pair of symmetrically distributed sealing plates (7) are slidably inserted on the outer wall of the discharge pipe (13), and a dust cover (72) is slidably sleeved on the outer wall of the discharge pipe (13).

6. The automatic toner replenishing device for a toner cartridge according to claim 5, characterized in that: The dust cover (72) is located below the sealing plate (7), and a pair of symmetrically distributed connecting rods (71) are rotatably plugged into the outer wall of the dust cover (72), and one end of each connecting rod (71) away from the dust cover (72) is rotatably plugged into the outer wall of the sealing plate (7).

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