Two-dimensional code scanner capable of long-distance code scanning

Abstract

The invention belongs to the technical field of Internet of Things sensing equipment, and particularly relates to a long-distance code scanning two-dimensional code scanner which comprises a camera scanning head, a shell, an SoC chip module and a scanner mainboard assembly, the inner wall of the shell is fixedly connected with a partition plate, and the outer wall of the camera scanning head is fixedly connected with the partition plate in a sleeving mode; the outer wall of the partition plate is provided with a fixing through hole used for installing a camera scanning head, and the scanner mainboard assembly is fixedly connected with a U-shaped frame through bolts. The long-distance scanning two-dimensional code scanner not only has the precise temperature control capability of the SoC chip module and maintains the scanning image processing precision of the two-dimensional code scanner, but also has the functions of cooling protection at the camera scanning head and dust prevention at the scanning end, so that the continuous long-distance scanning effect and reliability of the two-dimensional code scanner are improved, and the service life of the two-dimensional code scanner is prolonged. And the operation and maintenance convenience of the two-dimensional code scanner is improved, and the continuous operation capability of the two-dimensional code scanner can also be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of Internet of Things sensing devices, and in particular relates to a two-dimensional code scanner for long-distance code scanning. Background Art

[0002] In industrial production, long-distance QR code scanners provide key support for full-link traceability of products by quickly scanning product QR codes in a non-contact manner and recording data. They are highly adaptable to high-speed production lines, complex spatial layouts, and harsh environments such as dust and humidity, reducing manual operation time and errors, and significantly improving the efficiency and accuracy of production data collection. Once a product has quality problems, the recorded information can be used to quickly locate the production links, sources of raw materials, etc., to achieve efficient traceability. For example, the patent with authorized patent announcement number CN217690083U discloses a long-distance QR code scanner. Currently, long-distance QR code scanners often incorporate SoC chip modules to accelerate QR code image parsing and improve the ability to process blurry and distorted images at long distances. However, existing technologies still have two core pain points: First, when a QR code scanner scans at a long distance for a long time, the pixel density of the QR code decreases due to the increase in distance, making it prone to blurring or distortion. To address this, the QR code scanner relies on the AF (autofocus) controller built into the SoC chip module to drive the dynamic focus of the camera scanning head to achieve fast focus at long distances and reduce focus delay to ensure the efficiency of QR code perception and scanning. However, long-distance scanning requires continuous high computing power (for example, the computing power consumption reaches 1.2TOPS when processing 10-megapixel images and executing perspective correction algorithms), which can easily cause the junction temperature of the SoC chip module to rise rapidly (actually measured junction temperature can reach over 75°C under full load). The continuous high temperature reduces the computing speed of the SoC chip module (decoding frame rate drops by 30%) and degrades image processing accuracy, directly affecting the effectiveness and reliability of the QR code scanner's continuous long-distance scanning. Secondly, during the long-term long-distance scanning process of the QR code scanner, dust accumulation on the scanning end causes maintenance costs. In an industrial dust environment (such as a workshop dust concentration ≥ 50mg / m³), the average daily dust accumulation on the scanning lens surface can reach 20μg / cm², resulting in a decrease in image clarity (contrast reduced by more than 40%). Manual daily cleaning is required, which significantly increases the inconvenience of operation and maintenance, and at the same time affects the ability of the QR code scanner to scan codes at a long distance to operate continuously.

[0003] To this end, we propose a long-distance scanning QR code scanner to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a two-dimensional code scanner for long-distance scanning in order to solve the above problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions: a two-dimensional code scanner for long-distance code scanning, comprising a camera scanning head, a housing, a SoC chip module, and a scanner mainboard assembly, wherein the inner wall of the housing is fixedly connected to a partition, the outer wall of the camera scanning head is fixedly sleeved with the partition, the outer wall of the partition is provided with a fixing through-hole for mounting the camera scanning head, the scanner mainboard assembly is fixedly connected to a U-shaped frame by bolts, the side ends of the U-shaped frame are fixedly connected to the outer wall of the partition, the pins of the SoC chip module are electrically connected to the scanner mainboard assembly, and the top end of the housing is fixedly connected to a cover mechanism; The inner wall of the bottom end of the housing is fixedly connected with a convex frame and a glass cover plate, and the inner side wall of the glass cover plate is in contact with the outer wall of the convex frame; The outer wall of the partition is provided with two lamp holes, and the hole walls of the lamp holes are fixedly connected with LED fill lights; The bottom side wall of the shell is provided with a dustproof mechanism; The inner wall of the cover mechanism is fixedly connected with a sensing and protection mechanism.

[0006] In the above-mentioned long-distance QR code scanner, the cover mechanism includes a top plate connected to the top of the shell, the upper surface of the top plate is provided with a plurality of threaded countersunk holes, and the hole walls of the threaded countersunk holes are threadedly connected to limit bolts, the top of the shell is provided with a plurality of threaded blind holes that cooperate with the limit bolts, the inner wall of the top plate is fixedly connected with a sealing strip, the lip and tongue of the sealing strip are in sealing contact with the top inner wall of the shell, the upper surface of the top plate is provided with a through hole, and the hole wall of the through hole is fixedly connected with a wiring harness, the bottom end of the wiring harness is plugged with a connecting harness, and the bottom end of the connecting harness is electrically connected to the connection end of the scanner mainboard assembly.

[0007] In the above-mentioned long-distance QR code scanner, the sensing protection mechanism includes an insulating tube fixedly connected to the inner wall of the top plate, the bottom end of the insulating tube is fixedly connected to a heat-conducting sheet, the inner wall of the insulating tube is fixedly connected to a support plate, the outer wall of the bottom end of the insulating tube is fixedly connected to an exhaust nozzle, the upper surface of the support plate is fixedly connected to a micro-diaphragm pump, the air outlet end of the micro-diaphragm pump passes through the lower surface of the support plate, the upper surface of the heat-conducting sheet is fixedly connected to a straight heat pipe, and the partition is penetrated by a ventilation mechanism.

[0008] In the above-mentioned long-distance QR code scanner, the ventilation mechanism includes an L-shaped tube connected to the partition, the L-shaped tube is located in the area between the glass cover and the partition, a circular hole is opened in the tube wall of the L-shaped tube, and a micro temperature sensor is fixedly connected to the hole wall of the circular hole, and a micro controller is fixedly connected to the inner wall of the top plate.

[0009] In the above-mentioned long-distance QR code scanner, the air inlet end of the micro membrane pump is fixedly connected to a connecting pipe, an air inlet countersunk hole is opened on the upper surface of the top plate, and the hole wall of the air inlet countersunk hole is fixedly connected to an air filter block, and the top end of the connecting pipe passes through the top plate and is connected to the hole wall of the air inlet countersunk hole.

[0010] In the above-mentioned long-distance QR code scanner, the top ends of the plurality of straight heat pipes are fixedly sleeved with a plurality of heat dissipation meshes, and the lower surface of the heat conductive sheet and the upper surface of the SoC chip module are coated with a thermal grease layer.

[0011] In the above-mentioned long-distance QR code scanner, the dust-proof mechanism includes an L-shaped rectangular tube fixedly embedded in the side wall of the bottom end of the shell, the air inlet end of the L-shaped rectangular tube is connected to the interior of the shell, and the outer wall of the L-shaped rectangular tube is fixedly sleeved with a hollow bar, the outer wall of the hollow bar is fixedly connected to the outer wall of the shell, and the outer wall of the hollow bar is provided with a plurality of air outlet holes blowing toward the glass cover plate.

[0012] In the above-mentioned two-dimensional code scanner for long-distance code scanning, a side connecting strip is fixedly connected to the top outer wall of the shell, and two rectangular mounting holes are provided on the upper surface of the side connecting strip.

[0013] Compared with existing technologies, the advantages of a long-distance QR code scanner are: 1. Through the set perception protection mechanism, when the QR code scanner frequently scans at a long distance and causes the camera scanning head to dynamically adjust its focus, the microcontroller controls the micro membrane pump to work and sucks air to the bottom of the insulation cylinder. Then, the heat generated by the SoC chip module is diffused through the thermal grease layer, thermal conductive sheet, straight heat pipe and heat dissipation mesh. The air transported by the micro membrane pump accelerates the heat dissipation at the top of the straight heat pipe and the heat dissipation mesh, thereby improving the efficiency of heat dissipation of the SoC chip module, avoiding the situation in which the computing speed of the SoC chip module decreases and the image processing accuracy deteriorates due to untimely heat dissipation during the high computing power operation of the SoC chip module, and ensuring the performance of the SoC chip module in sensing the QR code information. This mechanism enables the QR code scanner for long-distance scanning to have the ability to accurately control the temperature of the SoC chip module, maintain the scanning image processing accuracy of the QR code scanner, and improve the effect and reliability of the QR code scanner for continuous long-distance scanning.

[0014] 2. Through the ventilation mechanism, the air ejected from the L-shaped tube will pass through the LED fill light and the camera scanning head. The flowing airflow will further cool the LED fill light and the camera scanning head to prevent damage to the LED fill light and the camera scanning head caused by high temperature, thereby improving the stability of the QR code scanner for long-distance scanning. In addition, the temperature of the air ejected by the sensing and protection mechanism is dynamically regulated by the ventilation mechanism and the micro-diaphragm pump to avoid continuous high pump speed operation and increase in energy consumption of the micro-diaphragm pump. In addition, the air ejected by the sensing and protection mechanism is cooled to prevent the temperature of the LED fill light and the camera scanning head from being too low. If the temperature is too low, moisture in the air will condense into water droplets and interfere with QR code scanning. This mechanism enables the QR code scanner to have the function of cooling the camera scanning head.

[0015] 3. Through the dust-proof mechanism, after the camera scanning head and LED fill light are cooled, the air enters the hollow bar through the L-shaped rectangular tube and is finally ejected from the air outlet of the hollow bar, so that the air forms a dust-proof air film layer on the surface of the glass cover, preventing dust from adhering to the surface of the glass cover, improving the clarity of the QR code scanned by the camera scanning head, and eliminating the need for manual daily wiping and cleaning. This mechanism enables the QR code scanner to have the function of dust-proof at the scanning end, which not only improves the convenience of the QR code scanner's operation and maintenance, but also improves the ability of the QR code scanner to continuously operate at a long distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of a two-dimensional code scanner for long-distance scanning provided by the present invention; Figure 2 This is a schematic cross-sectional structural diagram of a two-dimensional code scanner for long-distance code scanning provided by the present invention; Figure 3 yes Figure 2 An enlarged structural diagram of the middle cover mechanism; Figure 4 yes Figure 2 Schematic diagram of the structure of the dust-proof mechanism; Figure 5 This is a schematic structural diagram of a thermally conductive silicone grease layer in a two-dimensional code scanner for long-distance code scanning provided by the present invention; Figure 6 It is a structural schematic diagram of a sensing protection mechanism in a two-dimensional code scanner for long-distance code scanning provided by the present invention.

[0017] In the figure: 1 camera scanning head, 2 housing, 3 SoC chip module, 4 scanner mainboard assembly, 5 partition, 6 cover mechanism, 61 top plate, 62 limit bolt, 63 sealing strip, 64 wiring harness, 65 connecting harness, 7 dustproof mechanism, 71 L-shaped rectangular tube, 72 hollow bar, 73 air outlet, 8 sensing protection mechanism, 81 insulation tube, 82 thermal conductive sheet, 83 support plate, 84 exhaust nozzle, 85 micro membrane pump, 86 straight strip heat pipe, 9 ventilation mechanism, 91 L-shaped tube, 92 micro temperature sensor, 93 micro controller, 10 U-shaped frame, 11 convex frame, 12 glass cover, 13 LED fill light, 14 connecting pipe, 15 air filter block, 16 heat dissipation mesh, 17 thermal grease layer, 18 side connecting strip, 19 rectangular mounting hole. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] like Figures 1-6 As shown, a two-dimensional code scanner for long-distance scanning includes a camera scanning head 1, a shell 2, a SoC chip module 3 and a scanner mainboard assembly 4. The top outer wall of the shell 2 is fixedly connected with a side connecting strip 18. The upper surface of the side connecting strip 18 is provided with two rectangular mounting holes 19. The rectangular mounting holes 19 cooperate with the side connecting strip 18 to facilitate the installation of the two-dimensional code scanner for long-distance scanning. The inner wall of the shell 2 is fixedly connected with a partition 5. The outer wall of the camera scanning head 1 is fixedly sleeved with the partition 5. The outer wall of the partition 5 is provided with a fixing through hole for installing the camera scanning head 1. The scanner mainboard assembly 4 is fixedly connected with a U-shaped frame 10 by bolts. The side end of the U-shaped frame 10 is fixedly connected to the outer wall of the partition 5. The pins of group 3 are electrically connected to the scanner mainboard assembly 4, and the top of the shell 2 is fixedly connected to a cover mechanism 6, which includes a top plate 61 connected to the top of the shell 2. The upper surface of the top plate 61 is provided with a plurality of threaded countersunk holes, and the hole walls of the threaded countersunk holes are threadedly connected to limit bolts 62. The top of the shell 2 is provided with a plurality of threaded blind holes that match the limit bolts 62. The inner wall of the top plate 61 is fixedly connected with a sealing strip 63, and the lip and tongue of the sealing strip 63 are in sealing contact with the inner wall of the top of the shell 2. A through hole is provided on the upper surface of the top plate 61, and the hole wall of the through hole is fixedly connected with a wiring harness 64. The bottom end of the wiring harness 64 is plugged with a connecting harness 65, and the bottom end of the connecting harness 65 is electrically connected to the connection end of the scanner mainboard assembly 4.

[0020] The inner wall of the bottom end of the shell 2 is fixedly connected with a convex frame 11 and a glass cover 12. The inner wall of the glass cover 12 contacts the outer wall of the convex frame 11. The outer wall of the partition 5 is provided with two lamp holes, and the hole walls of the lamp holes are fixedly connected with LED fill lights 13.

[0021] A dustproof mechanism 7 is provided on the side wall of the bottom end of the shell 2. The dustproof mechanism 7 includes an L-shaped rectangular tube 71 fixedly embedded in the side wall of the bottom end of the shell 2. The air inlet end of the L-shaped rectangular tube 71 is connected to the interior of the shell 2. The outer wall of the L-shaped rectangular tube 71 is fixedly sleeved with a hollow bar 72. The outer wall of the hollow bar 72 is fixedly connected to the outer wall of the shell 2. The outer wall of the hollow bar 72 is provided with a plurality of air outlet holes 73 blowing toward the glass cover 12. This mechanism enables the QR code scanner to have the function of dustproofing the scanning end, which not only improves the convenience of operation and maintenance of the QR code scanner, but also improves the ability of the QR code scanner to continuously operate at a long distance.

[0022] The inner wall of the cover mechanism 6 is fixedly connected with a sensing protection mechanism 8, which includes a heat-insulating tube 81 fixedly connected to the inner wall of the top plate 61, a heat-conducting sheet 82 fixedly connected to the bottom end of the heat-insulating tube 81, a support plate 83 fixedly connected to the inner wall of the heat-insulating tube 81, an exhaust nozzle 84 fixedly connected to the outer wall of the bottom end of the heat-insulating tube 81, a micro-film pump 85 fixedly connected to the upper surface of the support plate 83, an air outlet end of the micro-film pump 85 passes through the lower surface of the support plate 83, a straight heat pipe 86 fixedly connected to the upper surface of the heat-conducting sheet 82, and a through-hole of the partition 5. A ventilation mechanism 9 is connected therethrough, and the ventilation mechanism 9 includes an L-shaped tube 91 connected to the partition 5. The L-shaped tube 91 is located in the area between the glass cover 12 and the partition 5. A circular hole is opened on the tube wall of the L-shaped tube 91, and a micro temperature sensor 92 is fixedly connected to the hole wall of the circular hole. A micro controller 93 is fixedly connected to the inner wall of the top plate 61. This mechanism enables the two-dimensional code scanner to have the function of cooling protection at the camera scanning head 1, and avoids condensation caused by the cooling air temperature being too low, further improving the effect and reliability of the two-dimensional code scanner's continuous long-distance scanning.

[0023] The air inlet end of the micro membrane pump 85 is fixedly connected to a connecting pipe 14, an air inlet countersunk hole is opened on the upper surface of the top plate 61, and the hole wall of the air inlet countersunk hole is fixedly connected to an air filter block 15, the top end of the connecting pipe 14 passes through the top plate 61 and is connected to the hole wall of the air inlet countersunk hole, and the top ends of multiple straight heat pipes 86 are jointly fixedly sleeved with multiple heat dissipation meshes 16, and the lower surface of the thermal conductive sheet 82 and the upper surface of the SoC chip module 3 are jointly coated with a thermal grease layer 17. The heat dissipation mesh 16 can increase the heat diffusion area of ​​the straight heat pipe 86 and improve the heat diffusion effect.

[0024] The operating principle of the present invention is now described as follows: When the QR code scanner is installed through the cover mechanism 6 and the QR code of the material on the industrial production line is scanned at a distance, the AF controller built into the SoC chip module 3 controls the dynamic focus of the camera scanning head 1 at a 50ms cycle based on the contrast gradient (threshold ≥ 1200mV) fed back by the image sensor, and simultaneously drives the LED fill light 13 for fill light. During this process, frequent control of the dynamic focus of the camera scanning head 1 will not only cause the SoC chip module 3 to heat up due to high computing power operation, but also cause a high temperature environment at the LED fill light 13 and the camera scanning head 1 due to untimely heat dissipation. At this time, the microcontroller 93 controls the micro membrane pump 85 to operate. The micro membrane pump 85 sucks air from the outside of the top plate 61 through the connecting pipe 14. The air is filtered and purified when passing through the air filter block 15. Then, the clean air is transported to the bottom of the insulation cylinder 81 through the micro membrane pump 85. Moreover, the heat generated by the operation of the SoC chip module 3 is transferred to the heat-conducting sheet 82 through the thermal grease layer 17, and the heat-conducting sheet 82 then diffuses the heat through the straight heat pipe 86. The working fluid inside the straight heat pipe 86 evaporates due to the heat and carries the heat to the top of the straight heat pipe 86 quickly. At this time, multiple heat dissipation meshes 16 expand the heat dissipation area of ​​the top of the straight heat pipe 86, and the evaporated working fluid is cooled and liquefied and refluxed, so that the heat can continue to diffuse rapidly. In addition, the external air sucked by the micro-film pump 85 is also blown to the top of the straight heat pipe 86 and the heat dissipation mesh 16, thereby improving the heat dissipation efficiency of the SoC chip module 3 and avoiding the SoC chip module 3. During high-computing-power operation, the computing speed decreases and the image processing accuracy deteriorates due to untimely heat dissipation. This ensures the performance of the SoC chip module 3 in sensing the QR code information. The air is then discharged into the interior of the housing 2 through the exhaust nozzle 84, accelerating the air flow speed inside the housing 2 and assisting in heat dissipation at the scanner mainboard component 4. After heat dissipation, the air is discharged through the L-shaped tube 91 and the dustproof mechanism 7. This mechanism enables the long-distance scanning QR code scanner to have the ability to accurately control the temperature of the SoC chip module 3 and maintain the scanning image processing accuracy of the QR code scanner, thereby improving the effect and reliability of the QR code scanner for continuous long-distance scanning. Then, the air ejected from the L-shaped tube 91 will pass through the LED fill light 13 and the camera scanning head 1. The flowing airflow will further cool down the LED fill light 13 and the camera scanning head 1, avoiding damage to the LED fill light 13 and the camera scanning head 1 caused by high temperature, thereby improving the stability of the two-dimensional code scanner for long-distance scanning. Moreover, after the air ejected from the sensing and protection mechanism 8 enters the L-shaped tube 91, the temperature will be detected by the micro temperature sensor 92. The micro temperature sensor 92 converts the detected temperature value into an electrical signal and transmits it to the micro controller 93. If the detected temperature value is higher than the temperature warning value preset by the micro controller 93, the micro controller 93 controls the micro membrane pump 85 to increase the pumping speed. By transporting more external air into the interior of the sensing and protection mechanism 8, the temperature of the air ejected from the exhaust nozzle 84 is reduced. Finally, the temperature of the air ejected through the L-shaped tube 91 is also reduced, and it can effectively cool down the LED fill light 13 and the camera scanning head 1. Moreover, the pumping speed of the micro membrane pump 85 is dynamically adjusted to avoid continuous high pumping speed operation and increase the energy consumption of the micro membrane pump 85. In addition, the air ejected by the sensing protection mechanism 8 is used to cool the LED fill light 13 and the camera scanning head 1, thereby preventing the temperature from being too low. If the temperature is too low, moisture in the air will condense into water droplets, interfering with the QR code scanning. This avoids the use of other cooling devices to generate low-temperature air, which may cause condensation at the scanning end. This mechanism enables the QR code scanner to have a cooling protection function at the camera scanning head 1, and prevents the cooling air from being too low to cause condensation, further improving the effect and reliability of the QR code scanner's continuous long-distance scanning. After the camera scanning head 1 and the LED fill light 13 are cooled, the air enters the hollow bar 72 through the L-shaped rectangular tube 71 and is finally ejected from the air outlet 73 of the hollow bar 72, so that the air forms a dust-proof air film layer on the surface of the glass cover plate 12, preventing dust from adhering to the surface of the glass cover plate 12, thereby improving the clarity of the QR code scanned by the camera scanning head 1, and eliminating the need for manual daily wiping and cleaning. This mechanism enables the QR code scanner to have a dust-proof function at the scanning end, which not only improves the convenience of the operation and maintenance of the QR code scanner, but also improves the ability of the QR code scanner to continuously operate at a long distance.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A two-dimensional code scanner for long-distance code scanning, comprising a camera scanning head (1), a housing (2), a SoC chip module (3) and a scanner mainboard assembly (4), characterized in that: The inner wall of the housing (2) is fixedly connected to a partition (5), the outer wall of the camera scanning head (1) is fixedly sleeved with the partition (5), the outer wall of the partition (5) is provided with a fixing through hole for installing the camera scanning head (1), the scanner mainboard assembly (4) is fixedly connected to a U-shaped frame (10) by bolts, the side end of the U-shaped frame (10) is fixedly connected to the outer wall of the partition (5), the pins of the SoC chip module (3) are electrically connected to the scanner mainboard assembly (4), and the top of the housing (2) is fixedly connected to a cover mechanism (6); The inner wall of the bottom end of the housing (2) is fixedly connected to a convex frame (11) and a glass cover plate (12), and the inner side wall of the glass cover plate (12) is in contact with the outer wall of the convex frame (11); The outer wall of the partition (5) is provided with two lamp holes, and the walls of the lamp holes are fixedly connected with LED fill lights (13); A dustproof mechanism (7) is provided on the bottom side wall of the housing (2); A sensing and protection mechanism (8) is fixedly connected to the inner wall of the cover mechanism (6).

2. The long-distance two-dimensional code scanner according to claim 1, characterized in that: The cover mechanism (6) includes a top plate (61) connected to the top of the housing (2), a plurality of threaded countersunk holes are provided on the upper surface of the top plate (61), and the hole walls of the threaded countersunk holes are threadedly connected to limit bolts (62), a plurality of threaded blind holes matching the limit bolts (62) are provided on the top of the housing (2), a sealing strip (63) is fixedly connected to the inner wall of the top plate (61), and the lip and tongue of the sealing strip (63) are in sealing contact with the top inner wall of the housing (2), a through hole is provided on the upper surface of the top plate (61), and a wiring harness (64) is fixedly connected to the hole wall of the through hole, a connecting harness (65) is plugged into the bottom end of the connecting harness (64), and the bottom end of the connecting harness (65) is electrically connected to the connection end of the scanner mainboard assembly (4).

3. The long-distance two-dimensional code scanner according to claim 2, characterized in that: The sensing protection mechanism (8) includes a heat-insulating tube (81) fixedly connected to the inner wall of the top plate (61), the bottom end of the heat-insulating tube (81) is fixedly connected to a heat-conducting sheet (82), the inner wall of the heat-insulating tube (81) is fixedly connected to a support plate (83), the outer wall of the bottom end of the heat-insulating tube (81) is fixedly connected to an exhaust nozzle (84), the upper surface of the support plate (83) is fixedly connected to a micro-membrane pump (85), the air outlet end of the micro-membrane pump (85) passes through the lower surface of the support plate (83), the upper surface of the heat-conducting sheet (82) is fixedly connected to a straight heat pipe (86), and the partition (5) is connected through with a ventilation mechanism (9).

4. The long-distance two-dimensional code scanner according to claim 3, characterized in that: The ventilation mechanism (9) comprises an L-shaped tube (91) connected to the partition (5) through the L-shaped tube (91), the L-shaped tube (91) being located in the area between the glass cover plate (12) and the partition (5), a circular hole being provided in the tube wall of the L-shaped tube (91), and a micro temperature sensor (92) being fixedly connected to the hole wall of the circular hole, and a micro controller (93) being fixedly connected to the inner wall of the top plate (61).

5. The long-distance two-dimensional code scanner according to claim 4, characterized in that: The air inlet end of the micro-membrane pump (85) is fixedly connected to a connecting pipe (14), an air inlet countersunk hole is opened on the upper surface of the top plate (61), and an air filter block (15) is fixedly connected to the hole wall of the air inlet countersunk hole, and the top end of the connecting pipe (14) passes through the top plate (61) and is connected to the hole wall of the air inlet countersunk hole.

6. The long-distance two-dimensional code scanner according to claim 3, characterized in that: The top ends of the plurality of straight heat pipes (86) are fixedly sleeved with a plurality of heat dissipation mesh sheets (16), and the lower surface of the heat conductive sheet (82) and the upper surface of the SoC chip module (3) are coated with a heat conductive silicone grease layer (17).

7. The long-distance two-dimensional code scanner according to claim 1, characterized in that: The dustproof mechanism (7) comprises an L-shaped rectangular tube (71) fixedly embedded in the side wall of the bottom end of the shell (2), the air inlet end of the L-shaped rectangular tube (71) is connected to the interior of the shell (2), the outer wall of the L-shaped rectangular tube (71) is fixedly sleeved with a hollow bar (72), the outer wall of the hollow bar (72) is fixedly connected to the outer wall of the shell (2), and the outer wall of the hollow bar (72) is provided with a plurality of air outlet holes (73) for blowing toward the glass cover plate (12).

8. The long-distance two-dimensional code scanner according to claim 1, characterized in that: A side connecting strip (18) is fixedly connected to the top outer wall of the housing (2), and two rectangular mounting holes (19) are provided on the upper surface of the side connecting strip (18).

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