Powder bin structure of laser printer

Abstract

The invention discloses a powder bin structure of a laser printer, relates to the technical field of powder bins, and aims to solve the technical problems that carbon powder is easy to accumulate into blocks in a powder box and is non-uniformly distributed, and the printing efficiency and quality are reduced, the powder bin structure comprises a printer main body, a powder bin assembly is arranged in the printer main body, and the powder bin assembly comprises a powder box, a transmission assembly, a drum frame and a photosensitive drum, a transmission assembly is arranged on the side wall of the photosensitive drum; a developing roller is arranged on the outer side wall of the powder box; a carbon powder bin is formed in an inner cavity of the powder box; a rotating part is arranged in the carbon powder bin; a plurality of scrapers are connected to the circumferential side wall of the rotating column, a carbon powder conveying channel is formed in the space of the inner wall of each scraper, and a plurality of scattering strips are arranged in each carbon powder conveying channel. The device has the advantages that the carbon powder is prevented from being blocked or accumulated into blocks, the carbon powder output smoothness is guaranteed, and the printing efficiency and quality are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of powder bins, and more particularly to a powder bin structure of a laser printer. Background Art

[0002] A laser printer is a printing output device that combines laser scanning technology with electronic photography technology. The toner bin structure of a laser printer is a key part of the printer for storing toner. Its design directly affects the printing quality and performance of the printer. Its main function is to load toner. During the printing process, the toner is adsorbed onto the paper through static electricity to complete the printing task.

[0003] The toner cartridge is usually composed of a plastic shell, toner, a photosensitive drum, a scraper and other parts. The photosensitive drum is the core component of the toner cartridge, responsible for transferring the toner to the paper, and the scraper is used to clean the excess toner on the photosensitive drum to ensure the printing quality.

[0004] During the laser printing process, the photosensitive drum is first charged and exposed to the laser beam to form an electrostatic image corresponding to the printed content. Then, the toner is adsorbed to the photosensitive drum by static electricity to form a toner image. Finally, when the paper passes through the toner cartridge, the toner image is transferred to the paper and fixed to the paper through a heating and fixing process. As the number of prints increases, the toner in the toner cartridge will gradually decrease. When the toner is exhausted, a new toner cartridge needs to be replaced.

[0005] The powder bin structure of an existing laser printer usually uses a developer roller with a charge on its surface to absorb the toner in the powder box and then transfer it to the photosensitive drum. However, the toner accumulates in the powder box for a long time, which easily leads to the toner agglomeration and uneven distribution, affecting the effect and efficiency of the developer roller to absorb the toner, and reducing the printing efficiency and quality. In view of this, we propose a powder bin structure for a laser printer. Summary of the invention

[0006] The object of the present invention is to provide a powder bin structure for a laser printer to solve the technical problem that toner is easily accumulated into agglomerates and unevenly distributed in a powder box, thereby reducing printing efficiency and quality.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a powder bin structure of a laser printer, comprising a printer body, wherein a powder bin assembly is arranged inside the printer body, and the powder bin assembly comprises a powder box, a transmission assembly, a drum frame and a photosensitive drum;

[0008] The powder box is arranged above the drum frame, the photosensitive drum is arranged at the bottom of the drum frame, and the transmission assembly is arranged on the side wall of the photosensitive drum;

[0009] The top surface of the drum frame is provided with an inserting plate, and the powder box is provided below the inserting plate;

[0010] The side wall of the photosensitive drum is connected to a rotating shaft 1;

[0011] The transmission assembly includes a gear 1 connected to a side wall of the rotating shaft, the output end of the gear 1 is meshed with a gear 2, the side wall of the gear 2 is connected to the rotating shaft 2, the circumferential side wall of the rotating shaft 2 is provided with a gear 3, the output end of the gear 3 is meshed with a gear 4, and the output end of the gear 4 is meshed with a gear 5;

[0012] The outer side wall of the powder box is provided with a developing roller, the top surface of the powder box is connected with a convex plate 1, the bottom surface of the powder box is connected with a plurality of convex plates 2, the other outer side wall of the powder box is provided with a cover plate, the side wall of the cover plate is provided with a powder adding port, and the inner cavity of the powder box forms a toner bin;

[0013] A rotating part is arranged inside the toner bin, and the developing roller and developing scraper are arranged at the outlet of the toner bin;

[0014] The rotating part includes a rotating shaft four connected to the side wall of the gear five, the side wall of the rotating shaft four is connected to a rotating column, the circumferential side wall of the rotating column is connected to a plurality of scrapers, the inner wall space of the scraper forms a carbon powder transmission channel, and a plurality of breaking strips are arranged in the carbon powder transmission channel.

[0015] Preferably, the top surface of the drum frame is provided with two groups of slots, the bottom of the plug board is connected with two groups of plug posts matching the slots, and the bottom surface of the plug board is plugged into and matched with the top surface of the drum frame through the plug posts.

[0016] Preferably, the side wall of the developing roller is connected to a rotating shaft three, the side wall of the rotating shaft three is provided with a square groove, the side wall of the rotating shaft two is provided with a protruding structure matching the square groove, and the rotating shaft three is plugged into the rotating shaft two through the square groove.

[0017] Preferably, the bottom surface of the plug plate is provided with a groove 1 matching with the convex plate 1, and the bottom surface of the drum frame is provided with a plurality of slots corresponding to the convex plate 2.

[0018] Preferably, the outer wall of the scraper is an arc-shaped curved surface structure, and the position where the toner bin contacts the outer wall of the scraper is set as an arc-shaped curved surface inner wall structure.

[0019] Preferably, the scraper head of the scraper is configured as a flat blade-like structure for scraping off the carbon powder adhering to the inner wall of the carbon powder bin.

[0020] Preferably, the plurality of the scattering bars are arranged in an array, and the side walls of the scattering bars are rotatably connected to a plurality of scattering columns.

[0021] Preferably, the breaking strips are arc-shaped thin sheet structures, and the breaking columns are thin strip-shaped cylindrical structures.

[0022] Preferably, a plurality of cone blocks are provided on the circumferential side wall of the scattering column, and the cone blocks are conical thorn-like structures, and every three cone blocks are arranged in a circular array on the circumferential side wall of the scattering column.

[0023] Preferably, the method for using the powder bin structure of the laser printer comprises the following steps:

[0024] S1, add toner, add toner into the toner box through the toner filling port;

[0025] S2, installation, insert the multiple convex plates 2 at the bottom of the powder box into the corresponding slots on the bottom of the drum frame, and at the same time, insert the rotating shaft 3 on the side wall of the developing roller into the rotating shaft 2 through the square slot, and further insert the plug at the bottom of the plug plate into the slot on the top surface of the drum frame to complete the installation and fixing effect of the powder box, and then insert the powder bin assembly into the printer body for use;

[0026] S3, print, start the printer body, and start printing. The transmission mechanism inside the printer body drives the photosensitive drum to rotate. When the photosensitive drum rotates, it drives gear one to rotate, and further drives gear two, gear three, gear four and gear five to rotate. Gear three drives the developing roller to rotate, and gear five drives multiple scrapers inside the toner bin to rotate around the rotating column. When the scraper rotates, it drives the toner to float up and down inside the toner bin, so that the toner is evenly distributed, and the toner is brought into the toner bin outlet, and the toner is adsorbed and transferred to the photosensitive drum by the developing roller, and then transferred to the paper through the photosensitive drum to print.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention drives the photosensitive drum to rotate through the transmission mechanism inside the printer body. When the photosensitive drum rotates, it drives gear 1 to rotate, and further drives gear 2, gear 3, gear 4 and gear 5 to rotate. Gear 3 drives the developing roller to rotate, and gear 5 drives multiple scrapers inside the toner bin to rotate around the rotating column. When the scrapers rotate, they drive the toner to float up and down inside the toner bin, so that the toner is evenly distributed to avoid blockage or accumulation, and the toner is brought into the toner bin outlet, and the toner is adsorbed and transferred to the photosensitive drum by the developing roller, and then transferred to the paper through the photosensitive drum for printing, thereby ensuring the smoothness of toner output, improving printing efficiency and quality, and solving the problem that toner is easily accumulated into blocks and unevenly distributed in the powder box, thereby reducing printing efficiency and quality.

[0029] 2. The present invention also designs the scraper to be an arc-shaped curved surface structure, so that the three scrapers cooperate with each other to form a circular closed loop, and cooperate with the arc-shaped curved inner wall structure of the inner wall of the toner bin, so that the three scrapers can effectively move the toner in the toner bin as a whole in a circular path when rotating in the toner bin. During the movement, the toner is affected by its own gravity and will continuously fall in the toner transmission channel of the scraper, hitting the inner wall of the scraper to break up the toner, further improving the uniform distribution of the toner in the toner bin, avoiding blockage or accumulation into agglomerates, and further solving the problem that toner is easily accumulated into agglomerates in the powder box, unevenly distributed, and reduces printing efficiency and quality.

[0030] 3. The present invention also provides a plurality of scattering bars in the toner transmission channel, so that when the toner continuously falls in the toner transmission channel of the scraper, it can hit the scattering bars, and the scattering bars have a separation effect on the toner. In addition, a rotatable scattering column is designed on the scattering bar, and a plurality of cone blocks with conical thorn-like structures are provided on the circumferential side wall of the scattering column, so that when a large amount of toner hits the scattering column, the scattering column is driven to rotate, and the cone blocks with conical thorn-like structures are further penetrated into the gaps of the toner to separate the toner, further making the toner more dispersed and difficult to accumulate into agglomerates, thereby improving the uniformity of the toner, and further solving the problem that the toner is easily accumulated into agglomerates and unevenly distributed in the powder box, thereby reducing the printing efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the powder bin assembly structure from a first perspective of the present invention;

[0033] Figure 3 This is a schematic diagram of the powder bin assembly structure from a second viewing angle of the present invention;

[0034] Figure 4 It is a schematic diagram of the transmission assembly structure of the present invention;

[0035] Figure 5 This is a schematic diagram of the disassembled structure of the powder bin assembly of the present invention;

[0036] Figure 6 It is a schematic diagram of the plug board structure of the present invention;

[0037] Figure 7 It is a schematic diagram of the drum frame structure of the present invention;

[0038] Figure 8 It is a schematic diagram of the external structure of the powder box of the present invention;

[0039] Fig. 9 It is a schematic diagram of the internal structure of the powder box of the present invention;

[0040] Fig.10 It is a schematic diagram of the scraper structure of the present invention;

[0041] Fig.11 It is a schematic diagram of the structure of the breaking strips of the present invention;

[0042] Fig.12 It is a schematic diagram of the structure of the broken-up column and cone block of the present invention.

[0043] Description of the numbers in the figure:

[0044] 1. Printer body; 2. Powder bin assembly; 3. Powder box; 4. Transmission assembly; 5. Drum frame; 6. Photosensitive drum;

[0045] 301, developing roller; 302, rotating shaft three; 303, square groove; 304, convex plate one; 305, convex plate two; 306, cover plate; 307, powder adding port; 308, toner bin; 309, rotating member; 310, developing scraper; 3091, rotating shaft four; 3092, rotating column; 3093, scraper; 3094, toner transmission channel; 3095, scattering bar; 3096, scattering column; 3097, cone block;

[0046] 401, gear one; 402, gear two; 403, gear three; 404, gear four; 405, gear five; 406, shaft two;

[0047] 501, plug board; 502, plug post; 503, slot;

[0048] 601. Axis one. DETAILED DESCRIPTION

[0049] like Figures 1 to 12 As shown, the powder bin structure of the laser printer of the present invention comprises a printer body 1, a powder bin assembly 2 is arranged inside the printer body 1, and the powder bin assembly 2 comprises a powder box 3, a transmission assembly 4, a drum frame 5 and a photosensitive drum 6;

[0050] In the embodiment of the present invention, a powder box 3 is arranged above the drum frame 5, a photosensitive drum 6 is arranged at the bottom of the drum frame 5, a transmission assembly 4 is arranged on the side wall of the photosensitive drum 6, a plug plate 501 is arranged on the top surface of the drum frame 5, a powder box 3 is arranged below the plug plate 501, a rotating shaft 601 is connected to the side wall of the photosensitive drum 6, and the transmission assembly 4 includes a gear 401 connected to the side wall of the rotating shaft 601, a gear 402 is meshed with a gear 402 at the output end of the gear 401, a rotating shaft 406 is connected to the side wall of the gear 2 402, a gear 3 403 is arranged on the circumferential side wall of the rotating shaft 2 406, a gear 404 is meshed with a gear 404 at the output end of the gear 3 403, and a gear 5 405 is meshed with the output end of the gear 4 404 The outer wall of the powder box 3 is provided with a developing roller 301, the top surface of the powder box 3 is connected with a convex plate 1 304, the bottom surface of the powder box 3 is connected with a plurality of convex plates 2 305, the other outer wall of the powder box 3 is provided with a cover plate 306, the side wall of the cover plate 306 is provided with a powder adding port 307, the inner cavity of the powder box 3 forms a toner bin 308, a rotating member 309 is provided inside the toner bin 308, a developing roller 301 and a developing scraper 310 are provided at the outlet of the toner bin 308, the rotating member 309 includes a rotating shaft 4 3091 connected to the side wall of the gear 5 405, the side wall of the rotating shaft 4 3091 is connected with a rotating column 3092, and the circumferential side wall of the rotating column 3092 is connected with three scrapers 3093;

[0051] The present invention drives the photosensitive drum 6 to rotate through the transmission mechanism inside the printer body 1. When the photosensitive drum 6 rotates, it drives the gear 1 401 to rotate, and further drives the gear 2 402, the gear 3 403, the gear 404 and the gear 5 405 to rotate. The gear 3 403 drives the developing roller 301 to rotate, and the gear 5 405 drives multiple scrapers 3093 inside the toner bin 308 to rotate around the rotating column 3092. When the scrapers 3093 rotate, they drive the toner to float up and down inside the toner bin 308, so that the toner is evenly distributed to avoid blockage or accumulation, and the toner is brought into the outlet of the toner bin 308, and the toner is adsorbed and transmitted to the photosensitive drum 6 by the developing roller 301, and then transferred to the paper through the photosensitive drum 6 for printing, thereby ensuring the smoothness of toner output and improving printing efficiency and quality.

[0052] In the embodiment of the present invention, the inner wall space of the scraper 3093 forms a toner transmission channel 3094, the outer wall of the scraper 3093 is an arc-shaped curved surface structure, the position where the toner bin 308 contacts the outer wall of the scraper 3093 is set to the arc-shaped curved surface inner wall structure, and the scraper head of the scraper 3093 is set to a flat blade-like structure for scraping off the toner adhering to the inner wall of the toner bin 308;

[0053] The present invention designs the scraper 3093 as an arc-shaped curved surface structure, so that the three scrapers 3093 cooperate with each other to form a circular closed loop, and cooperate with the arc-shaped curved inner wall structure of the inner wall of the toner bin 308, so that the three scrapers 3093 can effectively move the toner in the toner bin 308 as a whole in a circular path when rotating in the toner bin 308. During the movement, the toner is affected by its own gravity and will continuously fall in the toner transmission channel 3094 of the scraper 3093, hitting the inner wall of the scraper 3093 to break up the toner, thereby further improving the uniform distribution of the toner in the toner bin 308 and avoiding blockage or accumulation.

[0054] As another embodiment of the present invention, a plurality of scattering bars 3095 are arranged in an array in the carbon powder transmission channel 3094, and a plurality of scattering bars 3095 are rotatably connected to the side wall of the scattering bar 3095, the scattering bar 3095 is a circular arc-shaped thin sheet structure, the scattering column 3096 is a thin strip cylindrical structure, and a plurality of cone blocks 3097 are arranged on the circumferential side wall of the scattering column 3096, and the cone blocks 3097 are conical thorn-shaped structures, and every three cone blocks 3097 are arranged in a circular array on the circumferential side wall of the scattering column 3096;

[0055] The present invention provides a plurality of breaking bars in the carbon powder transmission channel, so that when the carbon powder continuously falls in the carbon powder transmission channel 3094 of the scraper 3093, it can hit the breaking bars, and the breaking bars have a separation effect on the carbon powder. In addition, a rotatable breaking column 3096 is designed on the breaking bar, and a plurality of cone blocks 3097 with conical thorn-like structures are provided on the circumferential side wall of the breaking column 3096. When a large amount of carbon powder hits the breaking column 3096, the breaking column 3096 is driven to rotate, and the cone blocks 3097 with conical thorn-like structures are further penetrated into the gaps of the carbon powder to separate the carbon powder, thereby making the carbon powder more dispersed and difficult to accumulate into blocks, thereby improving the uniformity of the carbon powder.

[0056] As another embodiment of the present invention, the top surface of the drum frame 5 is provided with two groups of slots 503, the bottom of the plug plate 501 is connected with two groups of plug posts 502 matching the slots 503, the bottom surface of the plug plate 501 is plugged with the top surface of the drum frame 5 through the plug posts 502, the side wall of the developing roller 301 is connected with the rotating shaft three 302, the side wall of the rotating shaft three 302 is provided with a square groove 303, the side wall of the rotating shaft two 406 is provided with a convex structure matching the square groove 303, the rotating shaft three 302 is plugged with the rotating shaft two 406 through the square groove 303, the bottom surface of the plug plate 501 is provided with a groove one matching the convex plate one 304, the bottom of the drum frame 5 The surface is provided with a plurality of grooves corresponding to the convex plate 2 305. The present invention inserts the plurality of convex plates 2 305 at the bottom of the powder box 3 into the grooves corresponding to the bottom surface of the drum frame 5. At the same time, the rotating shaft 302 of the side wall of the developing roller 301 is inserted into the rotating shaft 2 406 through the square groove 303. Further, the plug post 502 at the bottom of the plug plate 501 is inserted into the slot 503 on the top surface of the drum frame 5 to complete the installation and fixing effect of the powder box 3. Then, the powder bin assembly 2 is inserted into the interior of the printer body 1 for use, so that the device is easy to install and disassemble, and further makes the maintenance and replacement of the powder bin easier and faster.

[0057] Working principle: This embodiment provides a powder bin structure of a laser printer. When in use, toner is added to the powder box 3 through the powder adding port 307, and the multiple convex plates 305 at the bottom of the powder box 3 are inserted into the corresponding slots on the bottom surface of the drum frame 5. At the same time, the rotating shaft 302 on the side wall of the developing roller 301 is inserted into the rotating shaft 406 through the square slot 303. Further, the plug post 502 at the bottom of the plug plate 501 is inserted into the slot 503 on the top surface of the drum frame 5 to complete the installation and fixing effect of the powder box 3. Then, the powder bin assembly 2 is inserted into the printer body 1 for use, the printer body 1 is started, and printing is performed. The transmission mechanism inside the printer body 1 is driven by the transmission mechanism 302. The dynamic photosensitive drum 6 rotates, and when the photosensitive drum 6 rotates, it drives the gear 1 401 to rotate, and further drives the gear 2 402, the gear 3 403, the gear 404 and the gear 5 405 to rotate. The gear 3 403 drives the developing roller 301 to rotate, and the gear 5 405 drives multiple scrapers 3093 inside the toner bin 308 to rotate around the rotating column 3092. When the scraper 3093 rotates, it drives the toner to float up and down inside the toner bin 308, so that the toner is evenly distributed, and the toner is brought into the outlet of the toner bin 308, and the toner is adsorbed and transferred to the photosensitive drum 6 by the developing roller 301, and then transferred to the paper through the photosensitive drum 6 for printing.

[0058] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. The powder bin structure of a laser printer is characterized by: The printer comprises a printer body (1), wherein a powder bin assembly (2) is arranged inside the printer body (1), and the powder bin assembly (2) comprises a powder box (3), a transmission assembly (4), a drum frame (5) and a photosensitive drum (6); The powder box (3) is arranged above the drum frame (5), the photosensitive drum (6) is arranged at the bottom of the drum frame (5), and the transmission assembly (4) is arranged on the side wall of the photosensitive drum (6); The top surface of the drum frame (5) is provided with an inserting plate (501), and the powder box (3) is provided below the inserting plate (501); The side wall of the photosensitive drum (6) is connected to a rotating shaft 1 (601); The transmission assembly (4) comprises a gear one (401) connected to the side wall of the rotating shaft one (601), the output end of the gear one (401) is meshed with a gear two (402), the side wall of the gear two (402) is connected to the rotating shaft two (406), a gear three (403) is arranged on the circumferential side wall of the rotating shaft two (406), the output end of the gear three (403) is meshed with a gear four (404), and the output end of the gear four (404) is meshed with a gear five (405); The outer wall of the powder box (3) is provided with a developing roller (301), the top surface of the powder box (3) is connected with a convex plate 1 (304), the bottom surface of the powder box (3) is connected with a plurality of convex plates 2 (305), the other outer wall of the powder box (3) is provided with a cover plate (306), the side wall of the cover plate (306) is provided with a powder adding port (307), and the inner cavity of the powder box (3) forms a carbon powder bin (308); A rotating member (309) is arranged inside the toner bin (308), and the developing roller (301) and the developing scraper (310) are arranged at the outlet of the toner bin (308); The rotating member (309) includes a rotating shaft four (3091) connected to the side wall of the gear five (405), the side wall of the rotating shaft four (3091) is connected to a rotating column (3092), the circumferential side wall of the rotating column (3092) is connected to a plurality of scrapers (3093), the inner wall space of the scraper (3093) forms a carbon powder transmission channel (3094), and a plurality of breaking strips (3095) are arranged in the carbon powder transmission channel (3094).

2. The powder bin structure of a laser printer according to claim 1, characterized in that: The top surface of the drum frame (5) is provided with two groups of slots (503), the bottom of the plug board (501) is connected with two groups of plug posts (502) matching the slots (503), and the bottom surface of the plug board (501) is plugged into and matched with the top surface of the drum frame (5) through the plug posts (502).

3. The powder bin structure of a laser printer according to claim 2, characterized in that: The side wall of the developing roller (301) is connected to a rotating shaft three (302), the side wall of the rotating shaft three (302) is provided with a square groove (303), the side wall of the rotating shaft two (406) is provided with a protruding structure matching the square groove (303), and the rotating shaft three (302) is plugged into and matched with the rotating shaft two (406) through the square groove (303).

4. The powder bin structure of a laser printer according to claim 3, characterized in that: The bottom surface of the plug plate (501) is provided with a groove one matching the convex plate one (304), and the bottom surface of the drum frame (5) is provided with a plurality of slot holes corresponding to the convex plate two (305).

5. The powder bin structure of a laser printer according to claim 4, characterized in that: The outer wall of the scraper (3093) is an arc-shaped curved surface structure, and the position where the toner bin (308) contacts the outer wall of the scraper (3093) is set to be an arc-shaped curved surface inner wall structure.

6. The powder bin structure of a laser printer according to claim 5, characterized in that: The scraper head of the scraper (3093) is configured as a flat blade-like structure for scraping off the carbon powder adhering to the inner wall of the carbon powder bin (308).

7. The powder bin structure of a laser printer according to claim 6, characterized in that: The plurality of scattering bars (3095) are arranged in an array, and the side walls of the scattering bars (3095) are rotatably connected to a plurality of scattering columns (3096).

8. The powder bin structure of a laser printer according to claim 7, characterized in that: The scattering strip (3095) is an arc-shaped thin sheet structure, and the scattering column (3096) is a thin strip-shaped cylindrical structure.

9. The powder bin structure of a laser printer according to claim 8, characterized in that: The circumferential side wall of the scattering column (3096) is provided with a plurality of cone blocks (3097), each of which is a conical thorn-like structure, and every three cone blocks (3097) are arranged in a circular array on the circumferential side wall of the scattering column (3096).

10. The method for using the powder bin structure of a laser printer according to claim 9, characterized in that: The following steps are involved: S1, adding toner, adding toner into the powder box (3) through the powder adding port (307); S2, installation, inserting the plurality of convex plates 2 (305) at the bottom of the powder box (3) into the corresponding slots on the bottom surface of the drum frame (5), and at the same time, inserting the rotating shaft 3 (302) on the side wall of the developing roller (301) into the rotating shaft 2 (406) through the square slot (303), and further inserting the plug post (502) at the bottom of the plug plate (501) into the slot (503) on the top surface of the drum frame (5), completing the installation and fixing effect of the powder box (3), and then inserting the powder bin assembly (2) into the printer body (1) for use; S3, printing, starting the printer body (1), and performing printing. The transmission mechanism inside the printer body (1) drives the photosensitive drum (6) to rotate. When the photosensitive drum (6) rotates, it drives the gear 1 (401) to rotate, and further drives the gear 2 (402), gear 3 (403), gear 4 (404) and gear 5 (405) to rotate. The gear 3 (403) drives the developing roller (301) to rotate. The gear 5 (405) drives a plurality of scrapers (3093) inside the toner bin (308) to rotate around the rotating column (3092). When the scrapers (3093) rotate, they drive the toner to float up and down inside the toner bin (308), so that the toner is evenly distributed, and the toner is brought into the outlet of the toner bin (308). The toner is adsorbed and transferred to the photosensitive drum (6) by the developing roller (301), and then transferred to the paper through the photosensitive drum (6) to perform printing.

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