Handheld laser printer

Abstract

The utility model discloses a handheld laser printer, relates to the technical field of laser printers, and aims to solve the technical problem that the powdered ink supply amount of the handheld laser printer is difficult to meet the printing requirement of geological exploration work. Which comprises a printer body, the outer side wall of the printer body is sleeved with a support assembly, the bottom of the support assembly is provided with a storage ink bin assembly, the side wall of the storage ink bin assembly is provided with an ink adding assembly, the storage ink bin assembly comprises a storage ink powder box body, the side wall of the storage ink powder box body is provided with an ink adding pipe, and the other side wall of the storage ink powder box body is provided with a device groove. A fan and a pump are arranged in the device groove, the output end of the fan is connected with an air pipe I, the output end of the air pipe I is provided with a communicating pipe, the side wall of the powdered ink storage box body is connected with a powdered ink pipe I, the output end of the powdered ink pipe I is connected with the pump, the output end of the pump is connected with a powdered ink pipe II, and the output end of the powdered ink pipe II is provided with a communicating pipe. The toner cartridge has the advantages that the endurance capacity of the printer toner is improved, and old toner is prevented from being gathered into blocks.

Description

Technical Field

[0001] This invention relates to the field of laser printer technology, and more specifically, to a handheld laser printer. Background Technology

[0002] A handheld laser printer is a small, portable laser printing device that can be operated by hand.

[0003] Compared to traditional desktop or floor-standing printers, handheld laser printers are small and lightweight, making them easy to carry to different locations. They are typically battery-powered and can communicate with mobile devices (such as smartphones and tablets) via wireless connections (such as Bluetooth and Wi-Fi) to receive print jobs and data. Handheld laser printers have advantages in certain scenarios, such as when it is necessary to print labels, tickets, and documents instantly in outdoor locations, warehouses, or construction sites. However, their print area is usually smaller, and their printing speed and quality may not be as good as those of large office laser printers.

[0004] The working principle of a handheld laser printer is basically the same as that of a traditional laser printer, including steps such as charging, exposure, development, transfer, and fixing. Specifically, the photosensitive drum is filled with negative or positive charge. The laser beam irradiates the photosensitive drum, eliminating the charge on the image area to be printed and forming an electrostatic latent image. Toner is adsorbed on the photosensitive drum to form a toner image. The toner image is transferred to the printing paper. Heating is used to solidify the toner particles on the printing paper to form a stable image. Finally, the residual toner and charge on the photosensitive drum are removed to prepare for the next cycle.

[0005] In geological exploration, handheld laser printers have practical value. Geological explorers often need to conduct field investigations and data collection in the field. Using a handheld laser printer, labels for collection points, sample identification, and field record forms can be printed instantly. For example, when a valuable rock sample is found, a label containing information such as sample number, collection location, collection time, and geological feature description can be printed immediately and pasted on the sample to avoid subsequent confusion and information loss. When recording information such as geological profiles and stratigraphic structures, corresponding tables and charts can also be printed in a timely manner to facilitate on-site verification and annotation. In addition, simple maps and directional markers can be printed to facilitate the smooth progress of exploration work.

[0006] When using handheld laser printers in geological exploration, the outdoor environment necessitates their small size and light weight for portability. However, this also results in smaller ink cartridge capacities compared to conventional laser printers, leading to toner depletion. Since frequent printing is required during geological exploration, insufficient toner supply causes inconvenience. Therefore, we propose a handheld laser printer.

[0007] new content

[0008] The purpose of this invention is to provide a handheld laser printer to solve the technical problem that the toner supply of handheld laser printers is insufficient to meet the printing needs of geological exploration work.

[0009] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a handheld laser printer, including a printer body, a support assembly sleeved on the outer side wall of the printer body, a reserve ink tank assembly disposed at the bottom of the support assembly, and an ink filling assembly disposed on the side wall of the reserve ink tank assembly;

[0010] The printer body contains an ink cartridge.

[0011] The bracket assembly includes a protective frame fitted onto the outer side wall of the printer body. A square groove is provided on the side wall of the protective frame. A hand handle is connected to the other side wall of the protective frame. A paper output groove is provided on the other side wall of the protective frame. A lifting rod is provided above the protective frame.

[0012] The ink storage tank assembly includes an ink storage box connected to the bottom of the enclosure frame. An ink filling tube is provided on the side wall of the ink storage box. The inner cavity of the ink filling tube is connected to the inner cavity of the ink storage box. The inner cavity of the ink storage box is used to store ink storage.

[0013] The side wall of the toner storage box is provided with a device slot;

[0014] The ink filling assembly includes a fan and a pump disposed in the device slot. The output end of the fan is connected to a first air duct, and the output end of the first air duct is provided with a connecting pipe. The side wall of the toner storage box is connected to a first toner tube, and the inner cavity of the first toner tube communicates with the inner cavity of the toner storage box. The output end of the first toner tube is connected to the pump, and the output end of the pump is connected to a second toner tube. The output end of the second toner tube is provided with the connecting pipe, and the output end of the connecting pipe is connected to the inner cavity of the ink cartridge.

[0015] The connecting pipe includes a toner tube three connected to the output end of the toner tube two, and the connecting pipe also includes an air duct two connected to the output end of the air duct one. The outer circumference of the toner tube three is connected to a plurality of partitions, and the other side wall of the partitions is connected to the inner circumference of the air duct two. The outer circumference of the air duct two is fitted with a ventilation tube one, a ventilation tube two, and a ventilation tube three. The output end of the ventilation tube three is connected to the inner cavity of the ink cartridge.

[0016] Preferably, the top of the printer body is provided with a paper feed tray, and the side wall of the printer body is provided with a paper output tray.

[0017] Preferably, the top surface of the toner storage box is provided with a groove that matches the output board, the top surface of the groove is provided with multiple sliding grooves, and the bottom of the output board is provided with a slider that matches the sliding groove.

[0018] Preferably, a piston is provided at the top of the ink filling tube, and the bottom of the piston is a cylindrical structure made of rubber, and the bottom of the piston is inserted into the inner cavity of the ink filling tube.

[0019] Preferably, a plurality of ventilation holes are provided on one side wall of the ventilation pipe, and holes with the same structure as the ventilation holes are provided on the second and third side walls of the ventilation pipe, and a filter screen is provided at the outer end of the ventilation hole.

[0020] Preferably, the inner circumferential walls of the first and third vent pipes are tightly welded to the outer circumferential wall of the second vent pipe.

[0021] Preferably, the inner walls of the two circumferences of the vent pipe are rotatably connected to the outer walls of the two circumferences of the air duct. A circular insert plate is provided on one side wall of the vent pipe, and a circular insert plate with the same structure as the one side wall of the vent pipe is provided on the three side walls of the vent pipe. A circular slot that fits into the circular insert plate is provided on the two side walls of the vent pipe. The two side walls of the vent pipe are rotatably connected to one side wall of the vent pipe through the circular slot, and the two side walls of the vent pipe are rotatably connected to the three side walls of the vent pipe.

[0022] Preferably, the outer circumference of the vent pipe is connected to a baffle plate 1 and a baffle plate 2, the top of the baffle plate 2 is provided with a post, the outer circumference of the vent pipe 2 is connected to a lever plate, and the top surface of the lever plate is provided with a retaining ring that matches the post.

[0023] Preferably, the lever is disposed between the first baffle and the second baffle, and a plurality of springs are connected to the side wall of the lever, with the other end of each spring connected to the side wall of the second baffle.

[0024] Preferably, the method of using a handheld laser printer includes the following steps:

[0025] S1. Connect the vent hole by prying the retaining ring off the insert post. At this time, the side wall of the pry plate is subjected to the spring force and moves towards the baffle, which drives the second vent pipe to rotate until the side wall of the pry plate is in contact with the side wall of the baffle, so that the vent holes inside the first vent pipe, the second vent pipe and the third vent pipe are connected.

[0026] S2. Blow air, and then the fan delivers airflow into the air duct one, and further blows it into the inner cavity of the ink cartridge through the air duct two. This blows the toner on the inner wall of the ink cartridge to prevent the toner from clumping together and to make the toner separate and disperse in the inner cavity of the ink cartridge. The airflow in the ink cartridge flows out of the external space through the vent.

[0027] S3, anti-overflow, retains toner inside the cartridge cavity through the filter screen in the vent hole;

[0028] S4. Add ink: Using the pump, the toner in the toner storage chamber is guided through toner tube one into toner tube two, then further into toner tube three, and finally into the ink cartridge chamber, thus completing the ink addition.

[0029] Compared with the prior art, the beneficial effects of this new technology are:

[0030] 1. This new design incorporates a toner reservoir assembly. Toner is added to the reservoir via a refill tube. When the toner in the main printer cartridge is depleted, the toner in the reservoir replenishes the cartridge, ensuring normal printer operation. A pump draws toner from the reservoir into a second toner tube, then into a connecting tube, and finally into the cartridge cavity, thus refilling the cartridge. This increases the printer's toner capacity, meeting the printing needs of geological exploration work and solving the problem of insufficient toner supply in handheld laser printers for such tasks.

[0031] 2. Before refilling the ink cartridge, the remaining toner in the cartridge cavity tends to adhere to the inner wall of the cartridge, accumulating into clumps and affecting the refilling effect. This new design uses a fan to deliver airflow into the air duct, which, through a connecting pipe, blows the airflow into the cartridge cavity, dispersing the toner on the inner wall and preventing it from clumping. The airflow then flows out through the vent, and the filter inside the vent retains the toner within the cartridge cavity, ensuring the effectiveness of the refilled ink and preventing old toner from clumping and affecting the use of new toner. This further solves the problem of residual old toner easily accumulating into clumps.

[0032] 3. This new design also incorporates a multi-channel connecting pipe, which simultaneously facilitates air blowing, air discharge, and ink filling within the ink cartridge cavity. This simplifies the structure and avoids the cumbersome overall design that would otherwise require separate connecting pipes for air blowing, air discharge, and ink filling. During use, by disengaging the retaining ring from the insert, the side wall of the disengaging plate is spring-loaded and moves towards the baffle, causing the second vent pipe to rotate until its side wall contacts the side wall of the baffle. This connects the vent holes inside the first, second, and third vent pipes. When not in use, the vent holes are blocked, ensuring the ink cartridge's airtightness and further resolving the issue of poor internal sealing caused by vent holes. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of this novel invention.

[0034] Figure 2 This is a schematic diagram of the overall structure of this novel invention from a second perspective;

[0035] Figure 3 This is a schematic diagram of the support assembly structure of this novel invention;

[0036] Figure 4 This is a schematic diagram of the structure of the novel ink reservoir assembly and ink filling assembly;

[0037] Figure 5 This is a schematic diagram of the connecting pipe structure of this novel invention;

[0038] Figure 6 This is a schematic diagram of the cross-sectional structure of the new type of connecting pipe;

[0039] Figure 7 This is a partial cross-sectional view of the structure of the novel air duct.

[0040] Figure 8 This is a schematic diagram of the structure of ventilation tube one and ventilation tube three of this novel invention;

[0041] Figure 9 This is a schematic diagram of the second structure of the vent tube of this novel invention;

[0042] Figure 10 This is a schematic diagram of the new type of lever structure.

[0043] Explanation of the labels in the diagram:

[0044] 1. Printer body; 2. Stand assembly; 3. Ink tank assembly; 4. Ink refill assembly;

[0045] 101. Ink cartridge; 102. Paper feeder; 103. Paperboard output;

[0046] 201. Enclosure frame; 202. Hand handle; 203. Lifting rod; 204. Square slot; 205. Paper output slot;

[0047] 301. Toner storage box; 302. Device slot; 303. Plate slot; 304. Slide chute; 305. Ink filling tube; 306. Piston;

[0048] 401. Fan; 402. Pump; 403. Toner tube 1; 404. Toner tube 2; 405. Connecting pipe; 406. Air duct 1; 4051. Toner tube 3; 4052. Air duct 2; 4053. Partition; 4054. Ventilation tube 1; 4055. Ventilation tube 2; 4056. Ventilation tube 3; 4057. Circular insert plate; 4058. Circular slot; 4059. Ventilation hole; 40510. Filter screen; 40511. Baffle 1; 40512. Baffle 2; 40513. Toggle plate; 40514. Snap ring; 40515. Insert post; 40516. Spring. Detailed Implementation

[0049] like Figures 1 to 10 As shown, the present invention relates to a handheld laser printer, including a printer body 1, a bracket assembly 2 sleeved on the outer wall of the printer body 1, a reserve ink tank assembly 3 at the bottom of the bracket assembly 2, and an ink filling assembly 4 on the side wall of the reserve ink tank assembly 3.

[0050] In this embodiment of the invention, an ink cartridge 101 is disposed inside the printer body 1. The support assembly 2 includes a protective frame 201 fitted onto the outer wall of the printer body 1. A square groove 204 is formed on the side wall of the protective frame 201. A hand handle 202 is connected to the other side wall of the protective frame 201. A paper output slot 205 is formed on the other side wall of the protective frame 201. A lifting rod 203 is disposed above the protective frame 201. The ink storage tank assembly 3 includes a toner storage box 301 connected to the bottom of the protective frame 201. An ink filling tube 305 is disposed on the side wall of the toner storage box 301. The inner cavity of the ink filling tube 305 communicates with the inner cavity of the toner storage box 301. The toner storage box 301 is used to store reserve toner. The side wall of the reserve toner box 301 is provided with a device slot 302. The ink filling assembly 4 includes a fan 401 and a pump 402 disposed in the device slot 302. The output end of the fan 401 is connected to a first air duct 406. The output end of the first air duct 406 is provided with a connecting pipe 405. The side wall of the reserve toner box 301 is connected to a first toner tube 403. The inner cavity of the first toner tube 403 is connected to the inner cavity of the reserve toner box 301. The output end of the first toner tube 403 is connected to the pump 402. The output end of the pump 402 is connected to a second toner tube 404. The output end of the second toner tube 404 is provided with a connecting pipe 405. The output end of the connecting pipe 405 is connected to the inner cavity of the ink cartridge 101.

[0051] This new design incorporates a toner storage assembly 3, which uses a refill tube 305 to add toner to the inner cavity of the toner storage tank 301. When the toner in the ink cartridge 101 of the printer body 1 is depleted, the toner in the toner storage tank 301 can supply to the ink cartridge 101, ensuring the normal operation of the printer. The pump 402 operates to guide the toner in the inner cavity of the toner storage tank 301 through toner tube 1 403 into toner tube 2 404, further into connecting tube 405, and then into the inner cavity of ink cartridge 101 through connecting tube 405, thus completing the refilling of ink cartridge 101, increasing the printer's toner capacity and meeting the printing needs of geological exploration work.

[0052] In this embodiment of the invention, the connecting pipe 405 includes a toner tube 4051 connected to the output end of toner tube 404, and a second air duct 4052 connected to the output end of air duct 406. Multiple partitions 4053 are connected to the outer circumferential wall of the toner tube 4051, and the other side wall of the partitions 4053 is connected to the inner circumferential wall of the second air duct 4052. A first vent pipe 4054, a second vent pipe 4055, and a third vent pipe 4056 are sleeved on the outer circumferential wall of the second air duct 4052. The output end of the third vent pipe 4056 is connected to the inner cavity of the ink cartridge 101. Multiple vent holes 4059 are opened on the side wall of the first vent pipe 4054, and the side walls of the second vent pipe 4055 and the third vent pipe 4056 are... The ventilation system has holes with the same structure as vent 4059. A filter screen 40510 is installed at the outer end of vent 4059. The inner circumference of vent pipe 1 4054 and vent pipe 3 4056 is tightly welded to the outer circumference of vent pipe 2 4052. The inner circumference of vent pipe 2 4055 is rotatably connected to the outer circumference of vent pipe 2 4052. A circular annular insert plate 4057 is provided on the side wall of vent pipe 1 4054. A circular annular insert plate 4057 with the same structure as the side wall of vent pipe 3 4056 is provided on the side wall of vent pipe 1 4054. A circular annular slot 4058 that fits into the circular annular insert plate 4057 is provided on the side wall of vent pipe 2 4055. The side wall of vent pipe 2 4055 is connected to vent pipe 1 405 through the circular annular slot 4058. The four side walls are rotatably connected. The side wall of vent pipe two 4055 is rotatably connected to the side wall of vent pipe three 4056. The outer circumference of vent pipe one 4054 is connected to baffle one 40511 and baffle two 40512. A post 40515 is provided at the top of baffle two 40512. A lever 40513 is connected to the outer circumference of vent pipe two 4055. A retaining ring 40514 matching the post 40515 is provided on the top surface of lever 40513. Lever 40513 is located between baffle one 40511 and baffle two 40512. Multiple springs 40516 are connected to the side wall of lever 40513. The other end of spring 40516 is connected to the side wall of baffle two 40512. (This is related to adding ink to ink cartridge 101.) Previously, the remaining toner inside the ink cartridge 101 easily adhered to the inner wall of the ink cartridge 101, accumulating into clumps and affecting the ink refilling effect. The fan 401 delivers airflow into the air duct 406, and the airflow is blown into the inner cavity of the ink cartridge 101 through the connecting pipe 405. The air blows the toner on the inner wall of the ink cartridge 101, causing the toner to separate and disperse within the inner cavity of the ink cartridge 101, preventing the toner from clumping together. The airflow inside the ink cartridge 101 flows out to the outside space through the vent 4059, and the filter 40510 inside the vent 4059 retains the toner within the inner cavity of the ink cartridge 101, ensuring the performance of the ink cartridge 101 after refilling and preventing old toner from clumping together and affecting the use of new toner.

[0053] This new design also incorporates a multi-channel connecting pipe 405, which allows for simultaneous air blowing, air discharge, and ink filling within the ink cartridge 101. This simplifies the structure and avoids the cumbersome overall design of separate connecting pipes for air blowing, air discharge, and ink filling. During use, by disengaging the retaining ring 40514 from the insert post 40515, the side wall of the lever 40513 is moved towards the baffle 40511 by the spring force of the spring 40516. This causes the second vent pipe 4055 to rotate until its side wall contacts the side wall of the baffle 40511, connecting the vent holes 4059 inside the first vent pipe 4054, the second vent pipe 4055, and the third vent pipe 4056. When not in use, the vent holes 4059 are blocked, ensuring the airtightness of the ink cartridge 101.

[0054] In another embodiment of this invention, a paper feeder 102 is provided on the top of the printer body 1, and an output paperboard 103 is provided on the side wall of the printer body 1. The top surface of the toner storage box 301 is provided with a slot 303 that matches the output paperboard 103. The top surface of the slot 303 is provided with multiple sliding grooves 304. The bottom of the output paperboard 103 is provided with a slider that matches the sliding groove 304, so that the printed paper can be supported by the output paperboard 103 and prevented from falling to the ground.

[0055] In another embodiment of this invention, a piston 306 is provided at the top of the ink filling tube 305. The bottom of the piston 306 is a cylindrical structure made of rubber. The bottom of the piston 306 is inserted into the inner cavity of the ink filling tube 305. By inserting the rubber piston 306 into the inner channel of the ink filling tube 305, the ink filling tube 305 can be well sealed, ensuring the airtightness of the toner storage box 301.

[0056] Working Principle: This embodiment provides a handheld laser printer. In use, by disengaging the retaining ring 40514 from the insert post 40515, the side wall of the disengaging plate 40513, under the elastic force of the spring 40516, moves towards the first baffle 40511, causing the second vent pipe 4055 to rotate until the side wall of the disengaging plate 40513 is in contact with the side wall of the first baffle 40511. This connects the vent holes 4059 inside the first vent pipe 4054, the second vent pipe 4055, and the third vent pipe 4056. Airflow is then delivered into the first vent pipe 406 by the fan 401, and further flows through the second vent pipe 405... 2. Air is blown into the inner cavity of ink cartridge 101 to blow the toner on the inner wall of ink cartridge 101, preventing the toner from clumping together and causing the toner to separate and disperse within the inner cavity of ink cartridge 101. The airflow inside ink cartridge 101 flows out to the external space through vent 4059. The toner is retained in the inner cavity of ink cartridge 101 by the filter screen 40510 inside vent 4059. Pump 402 operates to guide the toner in the inner cavity of the toner storage box 301 through toner tube 1 403 into toner tube 2 404, further into toner tube 3 4051, and further into the inner cavity of ink cartridge 101, thus completing the ink filling of ink cartridge 101.

[0057] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this invention based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A hand-held laser printer characterized by, The printer includes a printer body (1), a bracket assembly (2) fitted on the outer wall of the printer body (1), a reserve ink tank assembly (3) at the bottom of the bracket assembly (2), and an ink filling assembly (4) on the side wall of the reserve ink tank assembly (3). The printer body (1) is equipped with an ink cartridge (101). The bracket assembly (2) includes a protective frame (201) fitted onto the outer wall of the printer body (1). The protective frame (201) has a square groove (204) on its side wall, a hand handle (202) connected to the other side wall of the protective frame (201), a paper output groove (205) on the other side wall of the protective frame (201), and a lifting rod (203) above the protective frame (201). The toner storage assembly (3) includes a toner storage box (301) connected to the bottom of the enclosure frame (201). The toner storage box (301) has an ink filling tube (305) on its side wall. The inner cavity of the ink filling tube (305) is connected to the inner cavity of the toner storage box (301). The inner cavity of the toner storage box (301) is used to store toner. The storage toner box (301) has a device slot (302) on its side wall; The ink filling assembly (4) includes a fan (401) and a pump (402) disposed in the device slot (302). The output end of the fan (401) is connected to a first air duct (406), and the output end of the first air duct (406) is provided with a connecting pipe (405). The side wall of the toner storage box (301) is connected to a first toner tube (403). The inner cavity of the first toner tube (403) is connected to the inner cavity of the toner storage box (301). The output end of the first toner tube (403) is connected to the pump (402). The output end of the pump (402) is connected to a second toner tube (404). The output end of the second toner tube (404) is provided with the connecting pipe (405), and the output end of the connecting pipe (405) is connected to the inner cavity of the ink cartridge (101). The connecting pipe (405) includes a toner tube three (4051) connected to the output end of the toner tube two (404). The connecting pipe (405) also includes an air duct two (4052) connected to the output end of the air duct one (406). The outer circumference of the toner tube three (4051) is connected to a plurality of partitions (4053). The other side wall of the partition (4053) is connected to the inner circumference of the air duct two (4052). The outer circumference of the air duct two (4052) is fitted with a ventilation tube one (4054), a ventilation tube two (4055) and a ventilation tube three (4056). The output end of the ventilation tube three (4056) is connected to the inner cavity of the ink cartridge (101).

2. The hand-held laser printer of claim 1, wherein, The printer body (1) is provided with a paper feed tray (102) on the top and a paper output tray (103) on the side wall of the printer body (1).

3. The hand-held laser printer of claim 2, wherein, The top surface of the toner storage box (301) is provided with a groove (303) that matches the output board (103). The top surface of the groove (303) is provided with a plurality of sliding grooves (304). The bottom of the output board (103) is provided with a slider that matches the sliding groove (304).

4. The hand-held laser printer of claim 3, wherein, A piston (306) is provided at the top of the ink tube (305). The bottom of the piston (306) is a cylindrical structure made of rubber. The bottom of the piston (306) is inserted into the inner cavity of the ink tube (305).

5. The hand-held laser printer of claim 4, wherein, The side wall of the first ventilation pipe (4054) has multiple ventilation holes (4059), the side walls of the second ventilation pipe (4055) and the third ventilation pipe (4056) have holes with the same structure as the ventilation holes (4059), and a filter screen (40510) is provided at the outer end of the ventilation hole (4059).

6. The hand-held laser printer of claim 5, wherein, The inner circumferential walls of ventilation pipe one (4054) and ventilation pipe three (4056) are tightly welded to the outer circumferential wall of ventilation pipe two (4052).

7. The hand-held laser printer of claim 6, wherein, The inner circumference of the second ventilation pipe (4055) is rotatably connected to the outer circumference of the second ventilation pipe (4052). The side wall of the first ventilation pipe (4054) is provided with a circular insert plate (4057). The side wall of the third ventilation pipe (4056) is provided with a circular insert plate (4057) of the same structure as the side wall of the first ventilation pipe (4054). The side wall of the second ventilation pipe (4055) is provided with a circular slot (4058) that fits with the circular insert plate (4057). The side wall of the second ventilation pipe (4055) is rotatably connected to the side wall of the first ventilation pipe (4054) through the circular slot (4058). The side wall of the second ventilation pipe (4055) is rotatably connected to the side wall of the third ventilation pipe (4056).

8. The hand-held laser printer of claim 7, wherein, The outer circumference of the first ventilation pipe (4054) is connected to a first baffle (40511) and a second baffle (40512). The top of the second baffle (40512) is provided with a post (40515). The outer circumference of the second ventilation pipe (4055) is connected to a lever (40513). The top surface of the lever (40513) is provided with a retaining ring (40514) that matches the post (40515).

9. The hand-held laser printer of claim 8, wherein, The lever (40513) is disposed between the first baffle (40511) and the second baffle (40512). A plurality of springs (40516) are connected to the side wall of the lever (40513), and the other end of the springs (40516) is connected to the side wall of the second baffle (40512).

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