Laser printer

Abstract

A laser printer belongs to the technical field of printers. According to the technical scheme, a front cover, an upper cover and a rear cover assembly are connected with a left rack assembly and a right rack assembly respectively; the left rack assembly and the right rack assembly are connected with the chassis assembly and the laser support assembly respectively, and the above seven components form a printer body frame and a shell. The laser assembly and the selenium drum assembly are arranged in the printer main body frame; the fixing assembly is fixed on the left rack assembly, the right rack assembly and the paper passing part assembly; the fixing open cover is connected with the rear cover assembly; the paper outlet supporting frame assembly is connected with the front cover. The preferential paper feeding assembly is arranged below the laser support assembly; the paper feeding baffle assembly is connected with the front cover. The beneficial effects of the utility model are that: the utility model shows obvious beneficial effects in the aspects of printing effect, compatibility and flexibility, printing speed, paper jam processing, structural stability and the like, and these advantages make the utility model have higher competitiveness and application value in the market.

Description

Technical Field

[0001] This utility model belongs to the field of printer technology, specifically relating to a laser printer that combines a new fixing device with a transmission system. Background Technology

[0002] Existing laser printers on the market have several shortcomings. First, most laser printers have high requirements for consumables, and these consumables are highly specialized, leading to high consumable costs for users. This is especially true for high-speed laser printers, where the price of specialized consumables is often comparable to the price of the printer itself, making consumable costs a significant burden for users with high print volumes.

[0003] Secondly, the transmission system of traditional laser printers is relatively complex, containing multiple gears and transmission components. This not only increases the manufacturing cost of the printer but may also lead to low transmission efficiency due to friction and wear between components. This affects not only the stability and lifespan of the printer but may also increase the user's maintenance costs.

[0004] Furthermore, the fuser unit design of traditional laser printers is often relatively fixed, making it difficult to be compatible with commonly used consumables widely available on the market. This limits the printer's versatility and the range of choices available to users, forcing them to consider consumable compatibility when selecting a printer.

[0005] Meanwhile, traditional laser printers have a simple paper path structure that lacks flexibility and struggles to meet diverse printing needs. For example, some users may require features such as priority paper feeding or tray-based paper feeding, but traditional printers often cannot meet these needs.

[0006] Finally, some traditional laser printers lack effective fault alarm mechanisms. When a printer malfunctions, users may find it difficult to detect and resolve the problem in a timely manner, thus affecting work efficiency. This not only increases the user's operating costs but may also negatively impact their business. Utility Model Content

[0007] To address the technical problems existing in the prior art, this invention provides a novel laser printer design. By employing a new transmission system, a unique fixing assembly, and a paper feed path structure, this printer not only improves printing efficiency and stability but also reduces user operating costs. Furthermore, this printer is compatible with commonly used consumables widely available on the market, meeting diverse user needs.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A laser printer, comprising:

[0010] The front cover, top cover, and rear cover assemblies are respectively connected to the left frame assembly and the right frame assembly; the left frame assembly and the right frame assembly are respectively connected to the chassis assembly and the laser bracket assembly, and the above seven components form the main frame and outer shell of the printer; the laser assembly and the toner cartridge assembly are located inside the main frame of the printer.

[0011] The fixing assembly is fixed to the left frame assembly, the right frame assembly, and the paper feed assembly;

[0012] The fixing cover is opened and connected to the rear cover assembly;

[0013] The paper output tray assembly is connected to the front cover;

[0014] The priority paper feed assembly is located below the laser support assembly;

[0015] The paper feed baffle assembly is connected to the front cover.

[0016] Furthermore, the left frame assembly includes a left slide assembly for the toner cartridge and a left frame, wherein the left slide assembly for the toner cartridge is disposed on the left frame.

[0017] Furthermore, the right rack assembly includes:

[0018] The motor is mounted on the right frame.

[0019] Motor gears, connected to the motor;

[0020] The secondary transmission gear of the motor meshes with the motor gear.

[0021] Idle gear A and idler gear C are respectively meshed with the secondary transmission gear of the motor;

[0022] Idle wheel B is meshed with idler wheel A;

[0023] The secondary transmission gear of the heating roller meshes with the idler wheel B.

[0024] The paper output roller transition gear meshes with the secondary transmission gear of the heating roller.

[0025] The drum gear and the secondary paper feed gear are respectively meshed with the idler wheel C;

[0026] The paper feed roller shaft gear meshes with the secondary paper feed transmission gear.

[0027] Furthermore, the fixing component includes:

[0028] The paper output roller shaft, the upper guide plate, and the pressure roller rear bracket are mounted on the fixing bracket;

[0029] The paper output auxiliary wheel assembly is disposed opposite to the paper output roller shaft;

[0030] The paper output roller gear is connected to the paper output roller shaft; the paper output roller transition gear is meshed with the paper output roller gear.

[0031] The heating roller gear meshes with the paper output roller transition gear.

[0032] The left and right release wrenches are respectively located on both sides of the rear support of the pressure roller;

[0033] The left and right separation wrenches are respectively connected to the paper separation frame R and the paper separation frame L;

[0034] The separation springs are respectively connected to the paper separation frame R, the paper separation frame L, and the fixing bracket.

[0035] Furthermore, the fixing assembly also includes:

[0036] The heating roller has a heating lamp inside and a thermistor on the outside;

[0037] The pressure roller is bonded to the heating roller by the tension of the separation spring;

[0038] A separating claw assembly is disposed above the heating roller;

[0039] An overload protector is installed on one side of the heating roller.

[0040] Furthermore, it also includes:

[0041] The U-axis is connected to the secondary paper feed transmission gear;

[0042] The paper feed roller shaft is positioned opposite to the paper feeding roller.

[0043] A paper feed sensor rod is disposed on one side of the paper feed roller shaft;

[0044] The transfer roller is positioned opposite the photosensitive drum.

[0045] Furthermore, the priority paper feed assembly is provided with a priority paper feed channel; the paper feed baffle assembly is provided with a paper tray paper feed channel.

[0046] Furthermore, the right frame is equipped with a buzzer.

[0047] Furthermore, it also includes a laser protective cover assembly and a laser support assembly, wherein the laser assembly is mounted on the laser support assembly and the laser protective cover assembly is disposed above the laser assembly.

[0048] The beneficial effects of this utility model are:

[0049] Compared with existing technologies, the transmission system of this utility model adopts multi-stage gear transmission. Through precise gear ratio design, a linear relationship between the motor output and the linear displacement output of each component is achieved. This design not only improves the stability and accuracy of the transmission but also reduces energy consumption and noise. The fixing assembly adopts a brand-new structural design, closely cooperating with the transmission system. The precise cooperation between the heating roller and the pressure roller ensures the stability and consistency of the fixing process. At the same time, the design of the separation claw assembly, separation spring, and left and right separation levers facilitates paper jam handling. The frame structure consists of a left frame assembly, a right frame assembly, a laser support assembly, a chassis assembly, a paper feed assembly, and a laser protective cover assembly. The precise assembly and fixing of these components ensures the overall stability and durability of the printer. Through the above structural design, the laser printer described in this utility model has the following technical features and beneficial effects:

[0050] 1. Significantly Improved Print Quality: By adopting a brand-new transmission system and fuser assembly design, this laser printer achieves more precise and stable print output. Multi-stage gear transmission and a precise output roller diameter design ensure synchronous output from components such as the feed roller, paper feed roller, photosensitive drum, heating roller, and output roller, thereby improving print clarity and consistency.

[0051] 2. Enhanced Compatibility and Flexibility: This laser printer design is compatible with various existing toner cartridges on the market, providing users with more choices and flexibility. This not only reduces users' consumable costs but also improves the printer's versatility and market competitiveness.

[0052] 3. Improved Printing Speed ​​and Efficiency: Thanks to the optimized transmission system and fuser assembly structure, the laser printer of this invention achieves a significant improvement in printing speed. This means that users can complete more printing tasks in a shorter time, thereby improving work efficiency.

[0053] 4. Simplified Paper Jam Handling: In the event of a paper jam, users can easily separate the pressure roller and heating roller by opening the fuser cover, thus conveniently removing the jammed paper. This design not only improves user convenience but also reduces the printer failure rate caused by paper jams.

[0054] 5. Stable structure and easy maintenance: The laser printer of this invention adopts a modular design, with tight and stable connections between components. Meanwhile, the fixed design of the rear cover assembly and rear cover plate also enhances the overall stability of the printer. Furthermore, due to the relatively simple structure of the transmission system and fuser assembly, maintenance is also more convenient.

[0055] In summary, the laser printer of this invention exhibits significant advantages in terms of print quality, compatibility and flexibility, printing speed, paper jam handling, and structural stability. These advantages make this invention more competitive and valuable in the market. Attached Figure Description

[0056] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0057] Figure 1 This is a diagram of the outer shell and transmission of the present invention with the right shell removed;

[0058] Figure 2 This is a cross-sectional view of the paper feeding channel of this utility model;

[0059] Figure 3 This is a schematic diagram of the fixing component structure of this utility model;

[0060] Figure 4 This is a cross-sectional view of the fixing component of this utility model;

[0061] In the diagram, the following labels are used: 1-Top cover, 2-Rear cover assembly, 3-Output roller shaft, 4-Idler wheel A, 5-Fixing cover opening, 6-Output roller gear, 7-Heating roller gear, 8-Idler wheel B, 9-Drum unit gear, 10-Idler wheel C, 11-Input roller shaft gear, 12-Secondary input transmission gear, 13-Chassis assembly, 14-Right frame, 15-Buzzer, 16-Motor gear, 17-Input baffle assembly, 18-Priority input assembly, 19-Front cover, 20-Secondary input transmission gear, 21-Output paper support assembly, 22-Left drum slide assembly, 23-Drum unit assembly, 24-Separation spring, 25-Pressure roller, 26-Heating roller, 27-Paper feed assembly, 28-Transfer roller. 29-Photosensitive drum, 30-Paper feed sensor rod, 31-Paper feed roller shaft, 32-Paper feed roller, 33-U-shaft, 34-Paper tray feed channel, 35-Priority feed channel, 36-Laser support assembly, 37-Laser assembly, 38-Laser protective cover assembly, 39-Upper guide plate, 40-Paper output auxiliary wheel assembly, 41-Left separation wrench, 42-Pressure roller rear support, 43-Right separation wrench, 44-Fixing bracket, 45-Paper output roller transition gear, 46-Heating lamp, 47-Thermistor, 48-Overload protector, 49-Separation claw assembly, 50-Motor, 51-Left frame, 52-Heating roller secondary transmission gear, 53-Paper take-off separation frame R, 54-Paper take-off separation frame L. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. The following description, in conjunction with the accompanying drawings... Figure 1-4 Further explanation of laser printers.

[0063] Example 1

[0064] A laser printer includes a front cover 19, an upper cover 1, and a rear cover assembly 2, which are respectively connected to a left frame assembly and a right frame assembly. The left frame assembly and the right frame assembly are respectively connected to a chassis assembly 13, and the above six components form the main frame of the printer. A laser assembly 37 and a toner cartridge assembly 23 are disposed inside the main frame of the printer. A fuser assembly is fixed on the left frame assembly, the right frame assembly, and the paper feed assembly 27. A fuser cover 5 is connected to the rear cover assembly 2. A paper output tray assembly 21 is connected to the upper cover 1. A priority paper feed assembly 18 is disposed below the front cover 19. A paper feed baffle assembly 17 is connected to the chassis assembly 13.

[0065] The left frame assembly includes a left slide rail assembly 22 for the toner cartridge and a left frame 51, with the left slide rail assembly 22 mounted on the left frame 51.

[0066] The right frame assembly includes: a motor 50 mounted on the right frame 14; a motor gear 16 connected to the motor 50; a secondary transmission gear 20 meshing with the motor gear 16; idler gears A4 and C10 meshing with the secondary transmission gear 20; idler gear B8 meshing with idler gear A4; a secondary transmission gear 52 for the heating roller meshing with idler gear B8; a paper output roller transition gear 45 meshing with the secondary transmission gear 52 for the heating roller; a drum gear 9 and a secondary transmission gear 12 for the paper feed, respectively meshing with idler gear C10; and a paper feed roller shaft gear 11 meshing with the secondary transmission gear 12 for the paper feed.

[0067] The fixing assembly includes: an output roller shaft 3, an upper guide plate 39, and a pressure roller rear support 42 mounted on the fixing bracket 44; an output auxiliary wheel assembly 40 opposite to the output roller shaft 3; an output roller gear 6 connected to the output roller shaft 3; an output roller transition gear 45 meshing with the output roller gear 6; a heating roller gear 7 meshing with the output roller transition gear 45; a left separation wrench 41 and a right separation wrench 43 respectively located on both sides of the pressure roller rear support 42; the left separation wrench 41 and the right separation wrench 43 respectively connected to the paper take-up separation frame R53 and the paper take-up separation frame L54. Separation springs 24 are connected to the paper take-up separation frame R53 and the paper take-up separation frame L54 and the fixing bracket 44 respectively. Heating roller 26 has a heating lamp 46 inside and a thermistor 47 outside; pressure roller 25 is attached to heating roller 26; separation claw assembly 49 is located above heating roller 26; overload protector 48 is located on one side of heating roller 26.

[0068] U-axis 33 is connected to the secondary transmission gear 12 for paper feeding; the paper feeding roller shaft 31 and the paper feed roller 32 are arranged opposite each other; the paper feeding sensor rod 30 is arranged on one side of the paper feeding roller shaft 31; the transfer roller 28 and the photosensitive drum 29 are arranged opposite each other. The priority paper feeding assembly 18 is provided with a priority paper feeding channel 35; the paper feeding baffle assembly 17 is provided with a paper tray paper feeding channel 34. The right frame 14 is provided with a buzzer 15. It also includes a laser protective cover assembly 38 and a laser support assembly 36, the laser assembly 37 is mounted on the laser support assembly 36, and the laser protective cover assembly 38 is arranged above the laser assembly 37.

[0069] Working principle: The transmission system uses motor 50 as the power source and achieves synchronous output of different components (fusing assembly, drum unit, and paper feed drive) through multi-stage gear transmission (motor gear 16, motor secondary transmission gear 20, etc.). The fusing assembly adopts a brand-new structure, which works closely with the transmission system to realize the continuous process of photosensitive, transfer, and fixing.

[0070] Work process:

[0071] When the laser printer is started, the entire printing process begins, and its detailed operation is as follows:

[0072] Motor start-up and initial drive:

[0073] Motor 50, as the power source of the entire transmission system, starts operating first. Motor gear 16 is directly connected to motor 50, and as the motor rotates, motor gear 16 also begins to rotate. Motor secondary transmission gear 20 meshes with motor gear 16, thus motor secondary transmission gear 20 also begins to rotate. Multi-stage gear transmission and component synchronization: Idler gears A4 and C10 mesh with motor secondary transmission gear 20 respectively, serving to transmit power and change the transmission direction. Idler gear B8 meshes with idler gear A4, further transmitting power. Heating roller secondary transmission gear 52 meshes with idler gear B8, transmitting power to heating roller gear 7 in the fixing assembly (indirectly transmitted through paper output roller transition gear 45). Simultaneously, idler gear C10 also meshes with drum gear 9 and paper feed secondary transmission gear 12, transmitting power to drum assembly 23 and the paper feed drive system respectively.

[0074] The function of the fixing unit:

[0075] The heating roller gear 7 drives the heating roller 26 to rotate, and the heating lamp 46 starts working to heat the heating roller 26. Thermistor 47 monitors the temperature of the heating roller 26 to ensure it is within an appropriate range. Pressure roller 25 is in contact with the heating roller 26 and rotates with it, together completing the fixing process for the paper. Separating claw assembly 49 is located above the heating roller 26 and is used to separate the paper from the heating roller 26 as it passes through. Overload protector 48 monitors the operating status of the heating roller 26 to prevent it from overheating or overloading.

[0076] Paper feeding and paper feeding process:

[0077] The secondary paper feed gear 12 is connected to the paper feed system via a U-shaft 33, driving the paper feed roller shaft 31 to rotate. The paper feed roller shaft 31 is positioned opposite to the paper feed roller 32. When the paper feed roller shaft 31 rotates, the paper feed roller 32 begins to rub the paper, feeding it into the printer. The paper feed sensor rod 30 monitors the paper entry status to ensure that the paper enters the printer correctly.

[0078] Photosensitive, transfer and output:

[0079] The photosensitive drum 29 in the drum assembly 23 rotates along with the drum gear 9. The laser assembly 37 emits a laser beam that illuminates the photosensitive drum 29, forming a latent image. The transfer roller 28 is positioned opposite the photosensitive drum 29 and transfers the toner from the latent image onto the paper. After being heated and pressurized by the fixing assembly, the toner is fixed onto the paper, forming the final printed output.

[0080] Paper output and paper jam handling:

[0081] After passing through the fuser assembly, the paper is fed into the paper output system. The paper output roller shaft 3 and the paper output auxiliary roller assembly 40 together feed the paper out of the printer. If a paper jam occurs, the user can open the fuser cover 5, rotate the left separation lever 41 and the right separation lever 43 upwards, causing the paper take-up separation frame R53 and the paper take-up separation frame L54 to move backwards and upwards, stretching the separation spring 24 connected to them, causing the pressure roller 25 and the heating roller 26 to separate, thereby easily removing the jammed paper.

[0082] Priority paper feed vs. paper tray feed:

[0083] The priority paper feed channel 35 on the priority paper feed assembly 18 allows users to prioritize printing on specific types of paper. The paper tray feed channel 34 on the paper feed baffle assembly 17 is used for automatic paper feeding from the paper tray.

[0084] Alarms and Protection:

[0085] A buzzer 15 on the right frame 14 sounds an alarm when the printer malfunctions or requires maintenance. The laser protector assembly 38 and the laser bracket assembly 36 protect the laser assembly 37 from damage.

[0086] This laser printer, through its precise transmission system and fusing assembly design, achieves a continuous process of photosensitive, transfer, and fusing, ensuring high-quality print output. Simultaneously, its compact structure and ease of maintenance, along with multiple paper feeding methods and paper jam handling functions, meet the diverse needs of users.

[0087] Example 2

[0088] This invention employs a specific transmission system, using a paper feed motor as the power source. Through multi-stage gear transmission and different output roller diameters, it achieves synchronous output from the feed roller, paper feed roller, photosensitive drum, heating roller, and output roller. The fixing assembly features a novel structure that corresponds to the transmission system, combining photosensitive, transfer, and fixing functions to meet the design requirements for fixing.

[0089] This utility model comprises the following components: a left frame assembly 51, a laser support assembly 36, a laser protective cover assembly 38, a top cover 1, a paper output tray assembly 21, a laser assembly 37, a toner cartridge assembly 23, a right frame assembly 14, a priority paper feed assembly 18, a paper tray feed assembly, a chassis assembly 13, a paper feeding assembly 27, a fixing assembly, a rear cover assembly 2, and a rear cover plate. The left frame assembly 51 consists of a left frame and a left toner cartridge slide assembly 22, while the right frame assembly consists of a right frame 14, a motor 50, and various transmission gears. These transmission gears include a motor gear 16, a secondary motor transmission gear 20, a toner cartridge gear 9, a paper feed roller shaft gear 11, a heating roller 26, a paper output roller gear 6, a paper feed transition gear, and various idler gears.

[0090] The paper feeding assembly consists of a paper feed section, a U-shaft 33, a paper feed sensor rod 30, a paper feed roller 32, a transfer roller 28, and a paper feed roller shaft 31. The fixing assembly consists of a fixing bracket 44, a heating roller 26, a heating lamp 46, a thermistor 47, an overload protector 48, a separation claw assembly 49, a pressure roller 25, a pressure roller rear bracket 42, an upper guide plate 39, a paper output roller shaft 3, a paper output auxiliary wheel assembly 40, a paper output roller gear 6, a separation spring 24, a left separation wrench 41, a right separation wrench 43, a paper take-up separation frame R53, and a paper take-up separation frame L54.

[0091] This utility model uses a frame structure composed of a left frame assembly 51, a right frame assembly 14, a laser support assembly 36, a chassis assembly 13, a paper feed assembly 27, and a laser protective cover assembly 38. The fixing assembly is then fixed to the left frame assembly 51, the right frame assembly, and the paper feed assembly 27, resulting in a more stable structure. The rear cover assembly 2 is then fixed to the left frame assembly 51, the right frame assembly, and the fixing assembly. Finally, the rear cover plate is fixed to the rear cover assembly 2, the left frame assembly 51, the right frame assembly, and the paper feed assembly 27, ensuring the stability of the frame. The fixing cover opening 5, the separation spring 24, the left separation wrench 41, the right separation wrench 43, the paper feed separation bracket R53, and the paper feed separation bracket L54 facilitate operation in case of paper jams. When a paper jam occurs, open the fuser cover 5. The fuser cover 5 causes the left separation lever 41 and the right separation lever 43 to rotate upward, causing the pressure roller 25 and the heating roller 26 to separate, and the paper can be easily removed. Then close the fuser cover 5. Under the restoring force of the separation spring 24, the left separation lever 41 and the right separation lever 43 rotate downward back to their original positions, causing the pressure roller 25 to return to its original position as well.

[0092] The transmission system of this utility model has three outputs: one for the fixing assembly, one for the toner cartridge, and one for the paper feed drive. Taking the fixing assembly output as an example, the motor is the power source, and the motor drives through the meshing of the motor gear 16, the motor secondary transmission gear 20, idler gears A4, B8, and C10, the heating roller secondary transmission gear 52, and the heating roller gear 7, so that the output of each step of the motor is linearly proportional to the linear displacement output of the heating roller 26. For the paper feed drive, the linear displacement of the paper feed is the same at different parts of the paper feed. The paper feed drive is linearly proportional to the linear displacement output of each step of the motor and the linear displacement output of the paper feed roller through the motor secondary transmission gear 20, idler gear C10, the paper feed secondary transmission gear 12, and the paper feed roller shaft gear 11, and the linear displacement of the paper feed roller is the same as that of the heating roller 26. For a set of toner cartridges, the transmission is also carried out sequentially through the meshing of the motor gear 16, the motor secondary transmission gear 20, the idler wheel C10, and the toner cartridge gear 9, so that the output of each step of the motor is in a certain linear relationship with the linear displacement output of the photosensitive drum 29 in the toner cartridge, and is consistent with the linear displacement of the heating roller 26.

[0093] This new laser printer, combining a drive system and a fixing assembly, offers superior print quality, strong compatibility, and high flexibility. It is compatible with existing toner cartridges on the market and boasts faster printing speeds than similar laser printers, meeting a wider range of customer needs while reducing costs.

[0094] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope of the technology disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A laser printer, characterized in that, include: Left rack assembly and right rack assembly; The front cover (19) is connected at both ends to the left frame assembly and the right frame assembly, respectively; The top cover (1) is connected at both ends to the left frame assembly and the right frame assembly, respectively; The rear cover assembly (2) is connected at both ends to the left frame assembly and the right frame assembly, respectively; The chassis assembly (13) and the laser support assembly (36) are respectively connected by the left frame assembly to the chassis assembly (13) and the laser support assembly (36), and the right frame assembly to the chassis assembly (13) and the laser support assembly (36). The front cover (19), upper cover (1), rear cover assembly (2), left frame assembly, right frame assembly, chassis assembly (13), and laser bracket assembly (36) together form the main frame and outer shell of the printer; The laser assembly (37) and the drum assembly (23) are located inside the main frame of the printer; The fixing assembly is fixed on the left frame assembly, the right frame assembly and the paper feed assembly (27); The fixing cover (5) is connected to the rear cover assembly (2); The paper feeder assembly (21) is connected to the front cover (19); A priority paper feed assembly (18) is located below the laser support assembly (36); The paper feed baffle assembly (17) is connected to the front cover (19).

2. The laser printer as described in claim 1, characterized in that, The left frame assembly includes a drum left slide assembly (22) and a left frame (51), wherein the drum left slide assembly (22) is disposed on the left frame (51).

3. The laser printer as described in claim 1, characterized in that, The right frame assembly includes: a motor (50) mounted on the right frame (14); Motor gear (16) is connected to the motor (50); The secondary transmission gear (20) of the motor meshes with the motor gear (16); Idler gear A (4) and idler gear C (10) are respectively meshed with the secondary transmission gear (20) of the motor; Idler wheel B (8) is meshed with idler wheel A (4); The secondary transmission gear (52) of the heating roller meshes with the idler wheel B (8); The paper output roller transition gear (45) meshes with the heating roller secondary transmission gear (52); The drum gear (9) and the paper feed secondary transmission gear (12) are respectively meshed with the idler wheel C (10); The paper feed roller shaft gear (11) meshes with the paper feed secondary transmission gear (12).

4. The laser printer as described in claim 3, characterized in that, The fixing assembly includes: The paper output roller shaft (3), the upper guide plate (39) and the pressure roller rear bracket (42) are mounted on the fixing bracket (44); The paper output auxiliary wheel assembly (40) is disposed opposite to the paper output roller shaft (3); The paper output roller gear (6) is connected to the paper output roller shaft (3); the paper output roller transition gear (45) is meshed with the paper output roller gear (6); The heating roller gear (7) meshes with the paper output roller transition gear (45); The left separation wrench (41) and the right separation wrench (43) are respectively set on both sides of the pressure roller rear support (42); the left separation wrench (41) and the right separation wrench (43) are respectively connected to the paper take-up separation frame R (53) and the paper take-up separation frame L (54); The separation spring (24) is connected to the paper take-up separation frame R (53), the paper take-up separation frame L (54), and the fixing bracket (44), respectively.

5. The laser printer as described in claim 4, characterized in that, The fixing assembly also includes: Heating roller (26) has a heating lamp (46) inside and a thermistor (47) outside; The pressure roller (25) is attached to the heating roller (26) by the tension of the separation spring (24); A separating claw assembly (49) is disposed above the heating roller (26); An overload protector (48) is provided on one side of the heating roller (26).

6. The laser printer as described in claim 3, characterized in that, Also includes: The U-axis (33) is connected to the secondary paper feed transmission gear (12); The paper feed roller shaft (31) is arranged opposite to the paper feed roller (32); The paper feed sensor rod (30) is disposed on one side of the paper feed roller shaft (31); The transfer roller (28) is positioned opposite to the photosensitive drum (29).

7. The laser printer as described in claim 3, characterized in that, The priority paper feed assembly (18) is provided with a priority paper feed channel (35); the paper feed baffle assembly (17) is provided with a paper tray paper feed channel (34).

8. The laser printer as described in claim 3, characterized in that, The right frame (14) is equipped with a buzzer (15).

9. The laser printer according to any one of claims 1-8, characterized in that, It also includes a laser protective cover assembly (38) and a laser support assembly (36), wherein the laser assembly (37) is mounted on the laser support assembly (36) and the laser protective cover assembly (38) is disposed above the laser assembly (37).

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