Encrypted access control card reader

Abstract

The utility model discloses an encryption type access control card reader relates to access control technical field, including aviation aluminum alloy base, base top is equipped with solar panel, back has base mounting hole, bottom is connected with outgoing line hole silica gel waterproof joint, middle part is equipped with the buckle groove that contains spring and lock tongue and is constituted embedded spring buckle, and the inside bottom layer of base has solar cell, and its lower is connected with three triangular distribution's positioning column, and the inside fixed area RFID card reader's main control PCB board, and this board contains ARM treater, country secret encryption chip and other components, and nickel copper alloy net box covers main control PCB board, and the top has the touch -control screen support fixed touch -control screen with foam, and touch -control screen is by special material constitutes, and is covered with polycarbonate panel, and base front recess is equipped with sealed recess and fluorine rubber sealing ring, realizes panel and base seal, and this encryption type access control card reader installation mode is flexible, and power supply is stable, and data safety, and anti -interference is strong, and the protective property is good, is applicable to a variety of security scene.

Description

Technical Field

[0001] This utility model relates to the field of security equipment technology, and in particular to an encrypted access control card reader. Background Technology

[0002] With the rapid development of the security industry, access control card readers, as core devices for identity recognition and security management, are widely used in office buildings, residential communities, industrial parks, and other scenarios. However, existing access control card readers still have many technical pain points in practical applications, making it difficult to meet the requirements of high security, high adaptability, and long-term stable operation. The specific manifestations are as follows:

[0003] 1. In terms of installation and fixing, traditional access control card readers mostly adopt a single installation method. They either rely on bolts for wall-mounting, which is cumbersome and causes significant damage to the wall, or they use a simple snap-on structure, which is convenient to install but lacks stability. They are prone to loosening and displacement under long-term use or vibration, making it difficult to adapt to the installation needs of different scenarios.

[0004] 2. In terms of power supply mode, most access control card readers rely on mains power, which requires the laying of dedicated power supply lines. This not only increases the installation cost and construction complexity, but also makes it difficult to deploy in outdoor or temporary locations where there is no mains power access. Some battery-powered devices have limited battery life, and frequent battery replacements increase maintenance costs and affect the continuous use of the devices.

[0005] 3. Data security and anti-interference performance are the core requirements of access control systems. In existing products, some card readers do not use dedicated encryption chips, making it easy for identity information to be stolen and tampered with during transmission, posing serious security risks. Even devices equipped with encryption modules often lack effective electromagnetic shielding structures, making their main control circuits susceptible to external electromagnetic interference (such as nearby motors, wireless signals, etc.), leading to abnormal data processing, shortened card reading distance, or increased misread rate. At the same time, internal signals may also be leaked to the outside, further reducing system security.

[0006] 4. In terms of human-computer interaction and protection performance, the touch screens of traditional card readers are often directly exposed or simply covered with ordinary glass, which are easily damaged by collisions and scratches. Moreover, the touch sensitivity is easily affected by environmental vibrations. The sealing structure of the device shell and panel is poorly designed, and ordinary rubber sealing rings are often used. In humid and dusty environments, it is difficult to effectively prevent moisture and dust from entering, which leads to corrosion of internal components and short circuits, significantly shortening the service life of the device.

[0007] In addition, the core circuit layout of some equipment is unreasonable, there is serious signal interference between various functional modules, and the power management capability is weak, making it difficult to ensure stable power supply to each component under complex operating conditions, which further reduces the reliability and durability of the equipment. Summary of the Invention

[0008] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide an encrypted access control card reader that can solve the above-mentioned problems.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] An encrypted access control card reader includes an aviation aluminum alloy base, a solar panel is provided on the top of the aviation aluminum alloy base, a base mounting hole is provided on the back, a silicone waterproof connector for the cable outlet is fixedly connected to the bottom, and a buckle groove is provided in the middle near the back, a spring is fixedly connected in the buckle groove, and a locking tongue is fixedly connected to the spring.

[0011] The bottom layer of the aviation aluminum alloy base is fixedly connected to a solar cell, and three positioning posts arranged in a triangle are fixedly connected below the solar cell.

[0012] The aviation aluminum alloy base is internally fixed with a main control PCB board, which is equipped with an RFID reader. The main control PCB board consists of an ARM processor, a national cryptographic encryption chip, peripheral resistors and capacitors, a power management circuit, a grounding plane, and an interface circuit.

[0013] An IPS LCD screen is located near the side of the touch screen bracket. An ITO conductive film is fixedly connected to the IPS LCD screen. Corning Gorilla Glass 3 is fixedly connected to the ITO conductive film. A polycarbonate panel is located on Corning Gorilla Glass 3.

[0014] A polycarbonate panel is fixedly connected to the aviation aluminum alloy base. A stepped groove is provided on the front of the aviation aluminum alloy base. A sealing groove is provided on the groove. A fluororubber sealing ring is movably connected to the sealing groove. The polycarbonate panel and the aviation aluminum alloy base are sealed by the fluororubber sealing ring.

[0015] A nickel-copper alloy mesh box is provided on the main control PCB board. The nickel-copper alloy mesh box is provided with mesh box mounting holes. A positioning sleeve is fixedly connected to the bottom of the nickel-copper alloy mesh box. The positioning sleeve and the positioning post cooperate to position the nickel-copper alloy mesh box. The nickel-copper alloy mesh box is fixed to the aviation aluminum alloy base with bolts through the mesh box mounting holes.

[0016] Four touch screen brackets are installed on the upper two sides of the nickel-copper alloy mesh box, arranged in pairs facing each other. The touch screen brackets are fixedly connected to the inside two sides of the aviation aluminum alloy base. Foam is installed on the touch screen brackets, and the touch screen is installed on the foam.

[0017] Preferably, the embedded spring buckle consists of a spring, a locking tongue, and a buckle groove.

[0018] Preferably, the interface circuit is located on the side of the main control PCB board closest to the aviation aluminum alloy base. A ground plane is fixedly connected to the interface circuit, a power management circuit is fixedly connected to the ground plane, and an ARM processor, a national cryptographic encryption chip, and peripheral resistors and capacitors are fixedly connected to the power management circuit.

[0019] Preferably, the main control PCB board is provided with holes that fit with the positioning posts.

[0020] Preferably, the nickel-copper alloy mesh box is box-shaped, enclosing the main control PCB board inside.

[0021] Preferably, the touch screen and the touch screen bracket are fixed together by bolts.

[0022] Preferably, the touch screen is composed of Corning Gorilla Glass 3, ITO conductive film, and IPS liquid crystal screen.

[0023] Preferably, the main control PCB board is provided with countersunk holes, and the main control PCB board is fixed to the aviation aluminum alloy base with bolts through the countersunk holes.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] 1. When the RFID card reader reads the card information or other identification components (such as biometric components, if any) obtain the identity information, the information is transmitted to the main control PCB board. The ARM processor on the main control PCB board performs preliminary processing on the received information and then transmits the information to the national cryptographic encryption chip. The national cryptographic encryption chip uses a specific encryption algorithm to encrypt the information to ensure data security.

[0026] 2. In this encrypted access control card reader, the electrical energy stored in the solar cell is processed by the power management circuit on the main control PCB board and converted into a stable voltage required by each component. At the same time, the power management circuit can also intelligently adjust the power supply according to the light conditions. When the light is insufficient, it can switch to other backup power supplies (if available) to ensure the continuous operation of the device. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Figure 1 This is a schematic diagram of the appearance of an encrypted access control card reader according to the present invention.

[0029] Figure 2 This is a schematic diagram of the internal structure of an encrypted access control card reader according to this utility model.

[0030] Figure 3 This is a cross-sectional schematic diagram of an encrypted access control card reader according to the present invention.

[0031] Figure 4 This utility model Figure 3 Enlarged diagram of point A in the middle.

[0032] Figure 5 This is a schematic diagram of a nickel-copper alloy mesh box for an encrypted access control card reader according to this utility model.

[0033] Figure 6 This is a schematic diagram of an encrypted access control card reader touch screen according to the present invention.

[0034] Figure 7 This is a cross-sectional schematic diagram of the spring clip of an encrypted access control card reader according to this utility model.

[0035] Figure 8 This is a schematic diagram of the back of an encrypted access control card reader according to this utility model.

[0036] Reference numerals: 1. Aviation aluminum alloy base; 2. Solar panel; 3. Polycarbonate panel; 4. Embedded spring clip; 5. Silicone waterproof connector for cable outlet; 6. Fluororubber sealing ring; 7. Sealing groove; 8. Touch screen; 9. Foam; 10. Touch screen bracket; 11. Main control PCB board; 12. Solar cell; 13. Countersunk hole; 14. Positioning post; 15. Nickel-copper alloy mesh box; 16. Mesh box mounting hole; 17. Positioning sleeve; 18. Base mounting hole; 19. Spring; 20. Locking tongue; 21. Clip groove; 22. Corning Gorilla Glass 3; 23. ITO conductive film; 24. IPS LCD screen; 25. ARM processor, national cryptographic encryption chip and peripheral resistors and capacitors; 26. Power management circuit; 27. Grounding plane; 28. Interface circuit. Detailed Implementation

[0037] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0038] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0040] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0041] Please see Figure 1-8 This utility model provides a technical solution: an encrypted access control card reader, including an aviation aluminum alloy base 1, a solar panel 2 on the top of the aviation aluminum alloy base 1, a base mounting hole 18 on the back of the aviation aluminum alloy base 1, a silicone waterproof connector 5 for a cable outlet fixedly connected to the bottom of the aviation aluminum alloy base 1, a buckle groove 21 in the middle of the aviation aluminum alloy base 1 near the back, a spring 19 fixedly connected in the buckle groove 21, and a locking tongue 20 fixedly connected to the spring 19. The aviation aluminum alloy base 1 can be snapped into a fixed position by squeezing the locking tongue 20; the spring 19, the locking tongue 20, and the buckle groove 21 constitute an embedded spring buckle 4.

[0042] During equipment installation, two methods can be selected: one is to use the mounting holes 18 on the back of the aviation aluminum alloy base 1 to wall-mount the equipment with bolts; the other is to use the embedded spring clips 4 for quick mounting. By squeezing the locking tongue 20, the spring 19 is compressed, and the base is inserted into the preset mounting position. After the spring 19 returns to its original position, it pushes the locking tongue 20 into the corresponding slot to complete the fixation. Both methods can ensure the stability of the equipment installation and adapt to different installation scenarios.

[0043] The aviation aluminum alloy base 1 has a solar cell 12 installed at the bottom layer inside. The solar panel 2 at the top of the aviation aluminum alloy base 1 receives light energy and converts it into electrical energy, which is then transmitted to the solar cell 12 at the bottom layer for storage. Three positioning posts 14 are fixedly connected below the solar cell 12. The three positioning posts 14 are arranged in a triangle. A main control PCB board 11 is fixedly connected inside the aviation aluminum alloy base 1. An RFID reader is installed on the main control PCB board 11.

[0044] The main control PCB board 11 consists of an ARM processor (STM32F407IGH6), a national cryptographic encryption chip (SSX1563), peripheral resistors and capacitors 25, power management circuits (LDO, DC-DC converter) 26, a ground plane 27, and interface circuits (RS485, Wiegand, USB debugging port) 28.

[0045] When the RFID reader reads the card information, or other identification components (such as biometric components, if any) obtain the identity information, the information is transmitted to the main control PCB board 11. The ARM processor (STM32F407IGH6) on the main control PCB board 11 performs preliminary processing on the received information and then transmits the information to the national cryptographic encryption chip (SSX1563). The national cryptographic encryption chip uses a specific encryption algorithm to encrypt the information to ensure the security of the data.

[0046] The main control PCB board 11 has an interface circuit (RS485, Wiegand, USB debugging port) 28 on the side near the aviation aluminum alloy base 1. A ground plane 27 is fixedly connected to the interface circuit (RS485, Wiegand, USB debugging port) 28. A power management circuit (LDO, DC-DC converter) 26 is fixedly connected to the ground plane 27. An ARM processor (STM32F407IGH6), a national cryptographic encryption chip (SSX1563), and peripheral resistor and capacitor components 25 are fixedly connected to the power management circuit (LDO, DC-DC converter) 26.

[0047] The electrical energy stored in the solar cell 12 is processed by the power management circuit (LDO, DC-DC converter) 26 on the main control PCB board 11 and converted into a stable voltage required by each component. At the same time, the power management circuit can also intelligently adjust the power supply according to the light conditions. When the light is insufficient, it can switch to other backup power supplies (if available) to ensure the continuous operation of the equipment.

[0048] The main control PCB board 11 is provided with holes that fit with the positioning posts 14 for positioning and installation of the main control PCB board 11. The main control PCB board 11 is provided with countersunk holes 13, and four countersunk holes 13 are distributed at the four corners of the main control PCB board 11. The main control PCB board 11 is fixed to the aviation aluminum alloy base 1 with bolts through the countersunk holes 13.

[0049] A nickel-copper alloy mesh box 15 is provided on the main control PCB board 11. The nickel-copper alloy mesh box 15 is provided with mesh box mounting holes 16. A positioning sleeve 17 is fixedly connected to the bottom of the nickel-copper alloy mesh box 15. The positioning sleeve 17 and the positioning post 14 cooperate to position the nickel-copper alloy mesh box 15. The nickel-copper alloy mesh box 15 is fixed to the aviation aluminum alloy base 1 with bolts through the mesh box mounting holes 16. The nickel-copper alloy mesh box 15 is box-shaped and covers the main control PCB board 11 inside.

[0050] The main control PCB board 11 is enclosed by a nickel-copper alloy mesh box 15. The nickel-copper alloy mesh box 15 is positioned by the positioning sleeve 17 and the positioning post 14, and is fixed to the base by bolts through the mesh box mounting hole 16. This structure can effectively shield external electromagnetic interference, prevent internal signal leakage, and ensure the stability and security of data processing and transmission.

[0051] Four touchscreen brackets 10 are arranged on both sides of the upper part of the nickel-copper alloy mesh box 15, facing each other in pairs. The touchscreen brackets 10 are fixedly connected to the inside of the aviation aluminum alloy base 1 on both sides. Foam 9 is installed on the touchscreen brackets 10, and touchscreens 8 are installed on the foam 9. The touchscreens 8 and the touchscreen brackets 10 are fixed with bolts. The touchscreens 8 are composed of Corning Gorilla Glass 3 22, ITO conductive film 23, and IPS LCD screen 24.

[0052] Near the touch screen bracket 10 is an IPS LCD screen 24, on which an ITO conductive film 23 is fixedly connected. Corning Gorilla Glass 3 22 is fixedly connected to the ITO conductive film 23, and a polycarbonate panel 3 is provided on the Corning Gorilla Glass 3 22.

[0053] The front of the aviation aluminum alloy base 1 is provided with a stepped groove, and a sealing groove 7 is provided on the groove. A fluororubber sealing ring 6 is movably connected to the sealing groove 7. The polycarbonate panel 3 is fixed to the aviation aluminum alloy base 1 by bolts, and the polycarbonate panel 3 and the aviation aluminum alloy base 1 are sealed by the fluororubber sealing ring 6.

[0054] Working principle: When installing the equipment, two methods can be selected. One is to use the mounting holes 18 on the back of the aviation aluminum alloy base 1 to fix it to the wall with bolts. The other is to achieve quick snap-fit ​​by using the embedded spring buckle 4. Pressing the locking tongue 20 compresses the spring 19, and after the base is snapped into the preset installation position, the spring 19 returns to its original position and pushes the locking tongue 20 into the corresponding slot to complete the fixation. Both methods can ensure the stability of the equipment installation and adapt to the needs of different installation scenarios.

[0055] The solar panel 2 on top of the aviation aluminum alloy base 1 receives light energy and converts it into electrical energy, which is then transmitted to the solar cells 12 at the bottom layer for storage. The electrical energy stored in the solar cells 12 is processed by the power management circuit (LDO, DC-DC converter) 26 on the main control PCB board 11 and converted into a stable voltage required by each component. At the same time, the power management circuit can also intelligently adjust the power supply according to the light conditions. When the light is insufficient, it can switch to other backup power supplies (if available) to ensure that the equipment continues to work.

[0056] When the RFID reader reads the card information, or other identification components (such as biometric components, if any) obtain the identity information, the information is transmitted to the main control PCB board 11. The ARM processor (STM32F407IGH6) on the main control PCB board 11 performs preliminary processing on the received information and then transmits the information to the national cryptographic encryption chip (SSX1563). The national cryptographic encryption chip uses a specific encryption algorithm to encrypt the information to ensure the security of the data.

[0057] Throughout the data processing, the ground plane 27 provides a stable ground reference for the circuit, reduces electromagnetic interference, and ensures the normal operation of the circuit. The encrypted data communicates with external devices (such as access controllers) through the interface circuit (RS485, Wiegand, USB debugging port) 28 to transmit verification results and other information.

[0058] In addition, the main control PCB board 11 is covered by a nickel-copper alloy mesh box 15. The nickel-copper alloy mesh box 15 is positioned by the positioning sleeve 17 and the positioning post 14, and is fixed to the base with bolts through the mesh box mounting hole 16. This structure can effectively shield external electromagnetic interference, prevent internal signal leakage, and ensure the stability and security of data processing and transmission.

[0059] When a user operates the device through the polycarbonate panel 3, the touch command is transmitted to the touch screen 8. The Corning Gorilla Glass 3 22 of the touch screen 8 provides protection. The ITO conductive film 23 senses the touch signal and converts it into an electrical signal, which is then transmitted to the IPS LCD screen 24. The IPS LCD screen 24 then displays the corresponding operation interface and feedback information, enabling interaction between the user and the device.

[0060] The touch screen 8 is fixed inside the aviation aluminum alloy base 1 by the touch screen bracket 10. The foam 9 on the bracket can play a role in buffering and shock absorption, reducing the impact of external vibration on the touch screen 8 and ensuring the accuracy of touch.

[0061] The stepped groove on the front of the aviation aluminum alloy base 1 is provided with a sealing groove 7. The fluororubber sealing ring 6 is placed in the sealing groove 7. When the polycarbonate panel 3 is fixed to the base by bolts, it will squeeze the fluororubber sealing ring 6, causing it to deform, thereby forming a good seal between the polycarbonate panel and the base. This effectively prevents dust, moisture and other substances from entering the equipment and protects the internal components. At the same time, the silicone waterproof connector 5 at the bottom of the aviation aluminum alloy base 1 can also seal the cable outlet, further enhancing the protective performance of the equipment.

[0062] Structural Description:

[0063] Aviation aluminum alloy base 1: As the basic frame of the equipment, it supports all components such as solar panel 2, polycarbonate panel 3, and main control PCB board 11. Aviation aluminum alloy is high in strength and light in weight, which can provide a stable installation base for all components of the equipment. At the same time, it has good heat dissipation performance, which can dissipate the heat generated by the internal components of the equipment during operation, ensuring that the equipment operates at a suitable temperature and extending the service life of the equipment.

[0064] Solar panel 2: Located on top of aviation aluminum alloy base 1, it is used to receive light energy and convert it into electrical energy. It uses solar energy, a clean energy source, to provide power, which is energy-saving and environmentally friendly, reducing dependence on traditional electricity. It is especially suitable for use in outdoor and other sunny environments, reducing wiring costs and dependence on power lines.

[0065] Polycarbonate panel 3: Set on Corning Gorilla Glass 3 22, it is fixed to the aerospace aluminum alloy base 1 by bolts. It is sturdy, has good light transmission, and can protect the internal components such as the touch screen from external physical damage, while not affecting the user's operation of the touch screen and viewing of the screen display content.

[0066] Embedded spring clip 4 (composed of spring 19, locking tongue 20, and clip groove 21): Pressing the locking tongue 20 compresses the spring 19, which can clip the base into the preset installation position. The spring 19 returns to its original position and pushes the locking tongue 20 into the corresponding groove to complete the fixation. This achieves quick snap-fit ​​without complicated tools, making the installation process simple and efficient, saving installation time. It is suitable for scenarios that require quick installation or may require frequent disassembly later, while also ensuring the stability of the equipment installation.

[0067] Silicone waterproof connector 5 for cable outlet: It is fixedly connected to the bottom of the aviation aluminum alloy base 1 to seal the cable outlet, further preventing moisture, dust and other contaminants from entering the equipment through the cable outlet, thus enhancing the overall protection performance of the equipment.

[0068] Fluororubber sealing ring 6: It is movably connected to the sealing groove 7 of the stepped groove on the front of the aviation aluminum alloy base 1. It is used for sealing between the polycarbonate panel 3 and the aviation aluminum alloy base 1. When the polycarbonate panel 3 is fixed on the base, the fluororubber sealing ring 6 is squeezed and deformed, which can effectively prevent dust, moisture and other substances from entering the equipment, protect the internal components, improve the protective performance of the equipment, and extend the service life of the equipment.

[0069] Sealing groove 7: Set on the stepped groove on the front of the aviation aluminum alloy base 1, it is used to place the fluororubber sealing ring 6. It provides a precise installation position for the fluororubber sealing ring 6, so that it can be stably embedded in the groove. When the polycarbonate panel 3 is fixed to the aviation aluminum alloy base 1, it can ensure that the fluororubber sealing ring 6 is evenly squeezed, thereby forming an effective sealing structure, better preventing dust, moisture and other substances from entering the equipment, and improving the sealing and protection performance of the equipment.

[0070] Touchscreen 8 (composed of Corning Gorilla Glass 3 22, ITO conductive film 23, and IPS LCD screen 24): It is fixed to foam 9 on touchscreen bracket 10 by bolts. Corning Gorilla Glass 3 22 has high strength and wear resistance, which can protect the internal structure of the touchscreen. ITO conductive film 23 can sense touch signals and convert them into electrical signals. IPS LCD screen 24 can display the operation interface and feedback information. The three work together to achieve good interaction between the user and the device, with sensitive operation and clear display.

[0071] Foam 9: Set on the touch screen bracket 10, located between the touch screen bracket 10 and the touch screen 8, it plays a role in buffering and shock absorption, reducing the impact of external vibrations on the touch screen 8, protecting the touch screen, and ensuring the accuracy and service life of touch.

[0072] Touchscreen bracket 10: It is fixedly connected to both sides inside the aviation aluminum alloy base 1 to fix the touchscreen 8, provide stable installation support for the touchscreen 8, ensure the stability of the touchscreen inside the device, and avoid the touchscreen from shifting or being damaged due to device shaking.

[0073] Main control PCB board 11: Fixedly connected inside the aviation aluminum alloy base 1, it is the core of data processing and control of the equipment. It integrates a variety of circuits and components to realize functions such as receiving, processing, encrypting and transmitting various types of information, enabling the equipment to complete core tasks such as identity recognition and data encryption. The collaborative work of each part improves the overall performance of the equipment.

[0074] ARM processor (STM32F407IGH6): On the ARM processor 25, it is used to perform preliminary processing on the received information. It has fast processing speed and stable performance, and can efficiently perform preliminary analysis and processing on various types of information, laying the foundation for subsequent encryption and other operations, and ensuring the timeliness of information processing.

[0075] The national cryptographic encryption chip (SSX1563) is used on the ARM processor 25 to encrypt information processed by the ARM processor. It adopts a specific encryption algorithm, which can effectively ensure the security of data and prevent information from being stolen or tampered with during transmission and processing. It improves the security performance of the device and is suitable for places with high information security requirements.

[0076] Power management circuit (LDO, DC-DC converter) 26: Connected to the ground plane 27, it is used to process the electrical energy stored in the solar cell 12, convert it into the stable voltage required by each component, and intelligently adjust the power supply according to the light conditions. It can provide a stable voltage for each component of the equipment, ensure the normal operation of each component, and intelligently adjust the power supply mode. When the light is insufficient, it switches to the backup power supply (if available), which improves the power supply reliability and energy utilization efficiency of the equipment.

[0077] Ground plane 27: Connected to interface circuit 28, it provides a stable ground reference for the circuit, reduces the impact of electromagnetic interference on the circuit, ensures the stability and accuracy of the circuit operation, and improves the data processing and transmission quality of the equipment.

[0078] Interface circuit (RS485, Wiegand, USB debugging port) 28: Located on the side of the main control PCB board 11 near the aviation aluminum alloy base 1, it is used to communicate with external devices, supports multiple communication protocols, and can transmit data with different external devices (such as access control controllers), enhancing the compatibility and expandability of the device and enabling it to adapt to different system environments.

[0079] Solar cell 12: Located at the bottom layer inside the aviation aluminum alloy base 1, it is used to store the electrical energy converted by the solar panel 2. It can store the electrical energy converted by the solar panel and provide power to the equipment when there is insufficient or no sunlight, ensuring the continuous and stable operation of the equipment and improving the equipment's endurance and reliability.

[0080] Countersunk holes 13: Distributed at the four corners of the main control PCB board 11, used to fix the main control PCB board 11 to the aviation aluminum alloy base 1 with bolts. The countersunk hole design allows the bolt head to be embedded in the hole, avoiding the bolt head from protruding from the surface of the main control PCB board, preventing interference with other components, ensuring the flatness and compactness of the connection between the main control PCB board and the base, and enhancing the stability of the connection.

[0081] Three positioning posts 14 are fixedly connected below the solar cell 12 and are arranged in a triangle. The triangular structure provides stability and provides precise positioning for the installation of the main control PCB board 11 and the nickel-copper alloy mesh box 15, ensuring that the installation position of each component is accurate and avoiding the impact of installation deviation on equipment performance.

[0082] Nickel-copper alloy mesh box 15: Positioned by the positioning sleeve 17 and positioning post 14, and fixed to the base with bolts through the mesh box mounting hole 16. It is box-shaped and covers the main control PCB board 11 inside, which can effectively shield external electromagnetic interference, prevent internal signal leakage, ensure the stability and security of data processing and transmission, and enable the equipment to work normally in complex electromagnetic environment.

[0083] Wire mesh box mounting hole 16: Set on the nickel-copper alloy wire mesh box 15, used to fix the nickel-copper alloy wire mesh box 15 to the aviation aluminum alloy base 1 by bolts. The nickel-copper alloy wire mesh box is fixed to the base by bolts passing through the wire mesh box mounting hole. The connection is reliable and can ensure that the nickel-copper alloy wire mesh box firmly covers the main control PCB board 11, ensuring its shielding effect is long-lasting and stable, and is not easily affected by vibration or other factors that may cause positional displacement and affect shielding performance.

[0084] Positioning sleeve 17: It is fixedly connected to the bottom of the nickel-copper alloy mesh box 15 and cooperates with the positioning post 14 to ensure that the nickel-copper alloy mesh box 15 is installed in an accurate position so that it can accurately cover the main control PCB board 11, ensuring the shielding effect, and at the same time enhancing the stability of the nickel-copper alloy mesh box installation.

[0085] Base mounting hole 18: Used for wall-mounting equipment with bolts. The bolt fixing provides high connection strength, allowing the equipment to be stably installed on the wall or other locations without loosening. It is suitable for scenarios with high requirements for installation stability.

[0086] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An encrypted access control card reader, comprising an aviation aluminum alloy base (1), characterized in that: The aviation aluminum alloy base (1) is equipped with a solar panel (2) on the top, a base mounting hole (18) on the back, and a silicone waterproof connector (5) for the cable outlet at the bottom. A buckle groove (21) is provided in the middle near the back, and a spring (19) is fixedly connected in the buckle groove (21). A locking tongue (20) is fixedly connected in the spring (19). A solar cell (12) is fixedly connected in the bottom layer inside the aviation aluminum alloy base (1). Three positioning posts (14) arranged in a triangle are fixedly connected below the solar cell (12). A main control PCB board (11) is fixedly connected inside the aviation aluminum alloy base (1). An RFID reader is provided on the main control PCB board (11). The main control PCB board (11) is composed of an ARM processor, a national cryptographic encryption chip, and peripheral resistors and capacitors (25), a power management circuit (26), a ground plane (27), and an interface circuit (28). An IPS LCD screen (24) is provided on the side near the touch screen bracket (10). An ITO conductive film (23) is fixedly connected on the IPS LCD screen (24). The O conductive film (23) is fixedly connected to Corning Gorilla Glass 3 (22), and a polycarbonate panel (3) is provided on the Corning Gorilla Glass 3 (22); the polycarbonate panel (3) is fixedly connected to the aerospace aluminum alloy base (1), and a stepped groove is provided on the front of the aerospace aluminum alloy base (1), a sealing groove (7) is provided on the groove, and a fluororubber sealing ring (6) is movably connected on the sealing groove (7). The polycarbonate panel (3) and the aerospace aluminum alloy base (1) are sealed by the fluororubber sealing ring (6); main A nickel-copper alloy mesh box (15) is provided on the control PCB board (11). The nickel-copper alloy mesh box (15) is provided with mesh box mounting holes (16). A positioning sleeve (17) is fixedly connected to the bottom of the nickel-copper alloy mesh box (15). Four touch screen brackets (10) are provided on both sides above the nickel-copper alloy mesh box (15), arranged in pairs facing each other. The touch screen brackets (10) are fixedly connected to both sides inside the aviation aluminum alloy base (1). Foam (9) is provided on the touch screen brackets (10), and touch screens (8) are provided on the foam (9).

2. The encrypted access control card reader according to claim 1, characterized in that: The positioning sleeve (17) and the positioning post (14) are connected to position the nickel-copper alloy mesh box (15). The nickel-copper alloy mesh box (15) is fixed to the aviation aluminum alloy base (1) by bolts through the mesh box mounting hole (16).

3. The encrypted access control card reader according to claim 1, characterized in that: The main control PCB board (11) has an interface circuit (28) on the side near the aviation aluminum alloy base (1). A ground plane (27) is fixedly connected to the interface circuit (28). A power management circuit (26) is fixedly connected to the ground plane (27). An ARM processor, a national cryptographic encryption chip, and peripheral resistor-capacitor components (25) are fixedly connected to the power management circuit (26).

4. The encrypted access control card reader according to claim 1, characterized in that: The main control PCB board (11) is provided with holes that match the positioning posts (14).

5. The encrypted access control card reader according to claim 1, characterized in that: The nickel-copper alloy mesh box (15) is box-shaped and covers the main control PCB board (11) inside.

6. The encrypted access control card reader according to claim 1, characterized in that: The touch screen (8) is composed of Corning Gorilla Glass 3 (22), ITO conductive film (23), and IPS LCD screen (24).

7. The encrypted access control card reader according to claim 1, characterized in that: The main control PCB board (11) is provided with countersunk holes (13), and the main control PCB board (11) is fixed to the aviation aluminum alloy base (1) by bolts through the countersunk holes (13).

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