An internet of things terminal device

Abstract

The application discloses an Internet of Things terminal device, which comprises a shell, a circuit board in the shell, a movable interface electrically connected to the circuit board through a connector, a plurality of fixed boxes penetrating through a side wall of the shell, a movable interface inserted into the fixed box, a plurality of first conductive copper rods arranged on the connector, a plurality of first through holes for the first conductive copper rods to pass through arranged on the fixed box, a plurality of second conductive copper rods arranged on the side of the movable interface facing the connector, a self-locking mechanism arranged on the side of the movable interface facing the connector, and a temperature detection mechanism arranged in the fixed box and used for the self-locking mechanism to pop out. The fixed box and the movable interface are arranged, the movable interface of the application can be displaced in a small range in the fixed box, so that impact transmission is reduced, the movable interface and the plug can be prevented from being damaged due to vibration, and the stability and reliability of equipment operation are improved.

Description

Technical Field

[0001] This invention relates to the field of Internet of Things (IoT) technology, and more specifically, to an IoT terminal device. Background Technology

[0002] IoT terminal devices are core components in IoT systems, responsible for data acquisition, remote control, and intelligent decision-making. They are widely used in various scenarios such as industry, agriculture, and smart cities. Taking industrial applications as an example, terminals typically need to collect and process data from various sensors such as displacement, temperature, and pressure in real time, and upload the data via wired or wireless means for equipment status monitoring, anomaly identification, and predictive maintenance.

[0003] In the aforementioned application environments, terminal devices are often exposed to complex conditions such as high vibration, dust, humidity, and corrosive gases for extended periods. Among these, high-frequency vibration is one of the most common and destructive factors. Vibrations generated during the operation of industrial machinery are transmitted directly to the interface along the sensor plug. Since existing terminals generally adopt a fixed interface structure, the metal contacts between the plug and the interface are prone to loosening, wear, or even local deformation under continuous vibration and impact, leading to poor contact. This, in turn, causes problems such as unstable data acquisition, interruption, or false triggering, affecting the continuity and reliability of equipment operation.

[0004] Meanwhile, in humid, dusty, or corrosive environments, metal contacts can oxidize and corrode, further increasing contact resistance. As contact resistance rises, current flowing through the connection points generates significant Joule heat, causing the contact temperature to rise continuously. If not detected and addressed promptly, this overheating can not only accelerate contact aging but also potentially lead to short circuits, burn-out, or even complete machine damage, posing safety hazards.

[0005] Furthermore, in actual operation and maintenance, due to the lack of an effective anti-misplugging structure for the interface, the plugging and unplugging operation relies entirely on manual labor. When maintenance personnel are inspecting or replacing sensors or moving equipment, they are prone to misplugging or incorrectly unplugging, which may cause the equipment to unexpectedly disconnect the circuit during operation. This not only causes the monitoring data to be interrupted, but may also affect the stability of the production process.

[0006] Therefore, existing IoT terminal devices still have shortcomings in terms of vibration resistance, contact temperature rise safety, interface connection reliability, and protection against misoperation. There is an urgent need to improve the interface structure and temperature protection mechanism to enhance the stability and safety of the terminal in complex industrial environments. Summary of the Invention

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0008] Therefore, the purpose of this invention is to provide an Internet of Things (IoT) terminal device, including a housing and a circuit board located inside therein, the circuit board being electrically connected to an active interface via a connector.

[0009] Multiple fixing boxes are inserted through one side wall of the outer shell, and movable interfaces are inserted inside the fixing boxes.

[0010] The connector is provided with a plurality of first conductive copper rods, and the fixing box is provided with a plurality of first through holes for the first conductive copper rods to pass through.

[0011] The active interface has multiple second conductive copper rods on the side facing the connector, and the first conductive copper rod has a slot inside for the insertion of the second conductive copper rod.

[0012] The active interface facing the connector is also provided with a self-locking mechanism, and the fixed box is provided with a temperature detection mechanism for the self-locking mechanism to pop out.

[0013] As a preferred technical solution:

[0014] As described above, in an IoT terminal device, the top and bottom walls of the active interface slot are provided with a first through groove, a clamping block is provided in the first through groove, and the groove wall of the first through groove is fixedly bonded to one end of a metal spring sheet.

[0015] The clamping block has a shaft running through it, and both ends of the shaft are fixedly connected to the first through groove.

[0016] The clamping block is a trapezoidal block, with one side of the top surface of the clamping block extending from the first through groove. The inclined surface of the clamping block is fixedly bonded to the other end of the metal spring sheet, and a rubber pad is bonded to the bottom surface of the clamping block.

[0017] With the above technical solution, the metal spring is shaped like a "∠", and the clamping block can rotate around the shaft. During the rotation, it can squeeze the metal spring, which will deform and generate elastic potential energy. The elastic potential energy can drive the clamping block to reset.

[0018] As described above, in an IoT terminal device, the self-locking mechanism includes a guide post fixed to the movable interface, a guide cylinder fixed to the connector, and a sleeve sleeved on the guide post. One end of the guide post extends out of the sleeve and into the guide cylinder. A first elastic spring is sleeved on the guide post located outside the sleeve. Both ends of the first elastic spring are fixedly bonded to the connector and the sleeve.

[0019] With the above technical solution, both the guide post and the sleeve can move linearly along the axis of the guide cylinder. During the movement, the first elastic spring will be stretched or compressed. The elastic potential energy of the first elastic spring can drive the guide post and the sleeve to reset.

[0020] As described above, in an IoT terminal device, a fixed ring is fitted onto the end face of the guide cylinder facing the guide post and is fixedly bonded thereto. A movable ring is also fitted onto the guide cylinder and is slidably connected thereto. A limiting ring is attached to one side of the movable ring and is fitted and bonded to the guide cylinder.

[0021] With the above technical solution, the movable ring can move linearly along the axis of the guide cylinder, while the fixed ring and the limiting ring are both fixed structures, thus limiting the range of movement of the movable ring.

[0022] In the IoT terminal device described above, both the fixed ring and the movable ring are tapered structures. The diameter of the fixed ring is smaller than the diameter of the movable ring. The tapered surface of the fixed ring faces the movable interface, and the tapered surface of the movable ring faces the connector.

[0023] Through the above technical solution, the size design of the fixed ring and the movable ring is such that when the movable block drives the movable ring to fit with the fixed ring, and when the movable block moves in the opposite direction and slides along the conical surface of the fixed ring and passes over the fixed ring, the movable block contacts the back of the movable ring and pushes the movable ring to move, so that the movable ring and the fixed ring separate. This design can prevent the movable block from directly passing over the movable ring through the fixed ring.

[0024] As described above, in an IoT terminal device, the sleeve is open on the side facing the movable interface, and the open end of the sleeve is fixedly bonded to the movable interface.

[0025] The sleeve has a second through groove for the movable locking block to pass through. A fixing cover is fixedly bonded to the outer wall of the sleeve around the second through groove. A fixing plate is integrally formed at one end of the movable locking block. The fixing plate is located inside the fixing cover. The fixing plate is connected to the inner wall of the fixing cover by a second elastic spring. The end of the movable locking block away from the fixing plate is wedge-shaped.

[0026] With the above technical solution, the side of the fixed cover that is connected to the outer wall of the sleeve is open, and the fixed plate is attached to the inner wall of the fixed cover, so that the fixed plate can move smoothly inside the fixed cover.

[0027] As described above, in an IoT terminal device, one side of the fixing box is open, and a second through hole is provided on the fixing box for the guide cylinder to pass through. The inner wall of the fixing box is fitted with the outer wall of the movable interface.

[0028] With the above technical solution, the fixing box is fixed to the outer shell by bolts, so that the fixing box can remain fixed and ensure that the internal moving interfaces can smoothly slide horizontally.

[0029] As described above, in an IoT terminal device, the temperature detection mechanism includes an electromagnet and a sensor for controlling the opening and closing of the electromagnet. The electromagnet is fixed to the inner walls of the top and bottom of the fixing box. A magnet is embedded inside the fixing plate, and the projection of the magnet is located on the electromagnet.

[0030] With the above technical solution, after the electromagnet is energized, it will generate magnetism. At this time, the opposite side of the electromagnet and the magnet block are opposite magnetic poles, and the electromagnet and the magnet block will generate an attraction force. Under the action of the attraction force, the magnet block will move towards the electromagnet.

[0031] As described above, in an IoT terminal device, the temperature detection mechanism further includes a metal sleeve located in the first through hole. Multiple metal sleeves are welded and fixed to a heat-conducting sheet. The inner circular surface of the metal sleeve is in contact with the outer wall of the first conductive copper rod, and the heat-conducting sheet is in contact with the detection end of the sensor.

[0032] Through the above technical solution, the heat on the first conductive copper rod will be transferred to the metal sleeve, and finally transferred to the sensor through the heat-conducting sheet, so that the temperature on the first conductive copper rod can be monitored by the sensor.

[0033] Compared with the prior art, the present invention has at least the following beneficial effects:

[0034] (1) The movable interface enhances vibration resistance. This device replaces the traditional fixed interface with a movable interface structure that can achieve slight displacement inside the fixed box. Through the insertion of the first and second conductive copper rods, the electrical connection maintains continuous contact during vibration. This displacement buffer structure can absorb high-frequency vibrations from industrial equipment, reduce the risk of impacts directly acting on the plug and contacts, and effectively avoid loosening, deformation, and poor contact of metal contacts caused by vibration, thereby significantly improving the data transmission stability and operational reliability of the terminal equipment in high vibration environments.

[0035] (2) The temperature detection mechanism achieves active power-off protection. This device integrates a chain-type temperature control mechanism of metal sleeve-heat conductive plate-temperature sensor-electromagnet inside the fixed box, which can detect abnormal temperature rise of the first conductive copper rod in real time. When the contact point experiences local temperature rise due to corrosion, overload, or poor contact, the system can trigger the electromagnet's attraction action, causing the self-locking mechanism to release and actively push the movable interface to pop out, thereby achieving rapid disconnection between the plug and the circuit board. This structure achieves port-level over-temperature protection, which can cut off the power supply in advance before the short circuit hazard occurs, significantly improving the inherent safety of the equipment.

[0036] (3) The self-locking mechanism ensures stable connection and prevents accidental disconnection. The self-locking mechanism, formed by the guide cylinder, sleeve, guide post, and the fixed and movable rings of the double-conical structure, automatically locks the movable interface after plug insertion, preventing the plug from being directly pulled out before the unlocking action is triggered. This structure combines locking, limiting, and automatic reset functions, improving the stability of the plug connection and preventing accidental or incorrect disconnection during maintenance, thus reducing the risk of signal interruption and equipment downtime. This quick-release structure achieves a secure connection while maintaining good ease of assembly and disassembly, improving operational reliability. Attached Figure Description

[0037] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0038] Figure 1 This is an overall perspective view of the present invention;

[0039] Figure 2 This is a diagram of the internal structure of the present invention;

[0040] Figure 3 This is a perspective view of the connector, mounting box, and movable interface of the present invention;

[0041] Figure 4 This is a perspective view of the connector, mounting box, and movable interface of the present invention;

[0042] Figure 5 This is a perspective cross-sectional view of the guide cylinder and sleeve of the present invention;

[0043] Figure 6 This is an exploded perspective view of the guide cylinder and sleeve of the present invention;

[0044] Figure 7 This is a sectional perspective view of the active interface and clamping block of the present invention;

[0045] Figure 8 This is a perspective view of the metal sleeve and heat-conducting plate of the present invention.

[0046] In the diagram: 1. Outer shell; 2. Circuit board; 3. Connector; 4. First conductive copper rod; 5. Fixing box; 6. Movable interface; 7. First through hole; 8. Second through hole; 9. First through groove; 10. Clamping block; 11. Shaft; 12. Metal spring; 13. Second conductive copper rod; 14. Guide post; 15. Guide cylinder; 16. Sleeve; 17. First elastic spring; 18. Second through groove; 19. Movable locking block; 20. Fixing plate; 21. Second elastic spring; 22. Fixing cover; 23. Fixing ring; 24. Movable ring; 25. Limiting ring; 26. Metal sleeve; 27. Heat-conducting plate; 28. Electromagnet. Detailed Implementation

[0047] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0048] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0049] like Figures 1-4 As shown, an embodiment of the present invention discloses an Internet of Things (IoT) terminal device, including a housing 1 and a circuit board 2 located inside therein. The circuit board 2 is electrically connected to an active interface 6 via a connector 3.

[0050] Multiple fixing boxes 5 are inserted through one side wall of the outer casing 1, and movable interfaces 6 are inserted inside the fixing boxes 5.

[0051] The connector 3 is provided with multiple first conductive copper rods 4, and the fixing box 5 is provided with multiple first through holes 7 for the first conductive copper rods 4 to pass through.

[0052] The active interface 6 has multiple second conductive copper rods 13 on the side facing the connector 3, and the first conductive copper rod 4 has a slot for inserting the second conductive copper rod 13.

[0053] The active interface 6 is also equipped with a self-locking mechanism on the side facing the connector 3, and the fixed box 5 is equipped with a temperature detection mechanism for the self-locking mechanism to pop out.

[0054] Specifically, the active interface 6 has multiple interfaces, which can collect different types of sensor data by connecting to the corresponding plugs. The circuit board 2 is also equipped with a data processing chip, specifically an STM32 model, which enables data acquisition, processing and transmission. By processing and analyzing the data, it helps to monitor the equipment status and carry out predictive maintenance.

[0055] The connector 3 includes a housing, through which a first conductive copper rod 4 passes. The housing has pins that are soldered to the first conductive copper rod 4. The first conductive copper rod 4, the pins, and the housing are encapsulated together by potting. The connector 3 is fixed to the circuit board 2 by soldering through the pins. When the first conductive copper rod 4 contacts the second conductive copper rod 13, the external plug can be connected to the circuit board through the movable interface 6, thereby realizing data transmission and processing.

[0056] When vibration occurs, the vibration of the external device will be transmitted to the movable interface 6 through the plug. The movable interface 6 will make a small displacement inside the fixed box 5. This displacement can reduce the impact of the impact on the connection between the movable interface 6 and the plug, and ensure the stability of the connection between the movable interface 6 and the plug.

[0057] During the movement, the end of the second conductive copper rod 13 also moves inside the first conductive copper rod 4. This ensures that the circuit remains connected and data transmission is not interrupted when the movable interface 6 is displaced.

[0058] When the external plug is inserted into the active interface 6, the self-locking mechanism prevents the plug from being accidentally pulled out, thus improving the safety and stability of the equipment.

[0059] When an overload occurs, or when corrosion occurs on the first conductive copper rod 4 and the second conductive copper rod 13, the contact area between the first conductive copper rod 4 and the second conductive copper rod 13 will heat up and the temperature will rise when the current flows through them. When the temperature rises to a certain value, it can be detected by the temperature detection mechanism. The temperature detection mechanism can control the self-locking mechanism to pop out the movable interface 6. After the movable interface 6 pops out, the first conductive copper rod 4 and the second conductive copper rod 13 will separate, thereby disconnecting the external plug from the terminal equipment and preventing the equipment from being damaged due to a short circuit.

[0060] In one specific embodiment of the present invention, the top and bottom walls of the slot of the active interface 6 are provided with a first through groove 9, a pressing block 10 is provided in the first through groove 9, and the groove wall of the first through groove 9 is fixedly bonded to one end of the metal spring sheet 12.

[0061] A shaft 11 runs through the inside of the clamping block 10, and both ends of the shaft 11 are fixedly connected to the first through groove 9.

[0062] The clamping block 10 is a trapezoidal block. One side of the top surface of the clamping block 10 extends out of the first through groove 9. The inclined surface of the clamping block 10 is fixedly bonded to the other end of the metal spring sheet 12. A rubber pad is bonded to the bottom surface of the clamping block 10.

[0063] Specifically, such as Figure 3 and Figure 7 As shown, in the initial state, the movable interface 6 is located outside the fixed box 5. When it is necessary to connect the movable interface 6 to the plug, the movable interface 6 can be held and the plug can be inserted into the slot inside the movable interface 6. Then, the movable interface 6 can be moved inside the fixed box 5 by pushing the plug.

[0064] Because one end of the clamping block 10 is tilted up under the action of the metal spring 12, when the movable interface 6 moves into the fixed box 5, the clamping block 10 will be squeezed by the inner wall of the fixed box 5, and then rotate along the shaft 11 in the first through groove 9, and squeeze the metal spring 12. At this time, the rubber pad at the bottom of the clamping block 10 will be tightly attached to the protective shell of the plug, so as to prevent the movable interface 6 from becoming loose from the plug, and at the same time prevent accidental disconnection.

[0065] When it is necessary to separate the movable interface 6 from the plug, simply continue to push the movable interface 6 a certain distance within the fixed box 5. The self-locking mechanism will cause the movable interface 6 to pop out. In this way, the clamping block 10 will move out of the fixed box 5 and lose the squeezing effect of the inner wall of the fixed box 5. The metal spring 12 will cause the clamping block 10 to rotate and reset around the shaft 11 through elastic deformation, so that the rubber pad at the bottom of the clamping block 10 will separate from the protective shell of the plug. At this time, the plug can be pulled out from the movable interface 6.

[0066] In one specific embodiment of the present invention, the self-locking mechanism includes a guide post 14 fixed on the movable interface 6, a guide cylinder 15 fixed on the connector 3, and a sleeve 16 sleeved on the guide post 14. One end of the guide post 14 passes through the sleeve 16 and extends into the guide cylinder 15. A first elastic spring 17 is sleeved on the guide post 14 located outside the sleeve 16. Both ends of the first elastic spring 17 are fixedly bonded to the connector 3 and the sleeve 16.

[0067] A fixed ring 23 is fitted on the end face of the guide cylinder 15 facing the guide post 14 and is fixedly bonded to it. A movable ring 24 is also fitted on the guide cylinder 15 and is slidably connected to it. A limiting ring 25 is attached to one side of the movable ring 24 and is fitted and bonded to the guide cylinder 15.

[0068] Both the fixed ring 23 and the movable ring 24 are tapered structures. The diameter of the fixed ring 23 is smaller than that of the movable ring 24. The tapered surface of the fixed ring 23 faces the movable interface 6, and the tapered surface of the movable ring 24 faces the connector 3.

[0069] The sleeve 16 is open on the side facing the movable interface 6, and the open end of the sleeve 16 is fixedly bonded to the movable interface 6.

[0070] The sleeve 16 has a second through groove 18 for the movable locking block 19 to pass through. A fixing cover 22 is fixedly bonded to the outer wall of the sleeve 16 around the second through groove 18. A fixing plate 20 is integrally formed at one end of the movable locking block 19. The fixing plate 20 is located inside the fixing cover 22. The fixing plate 20 is connected to the inner wall of the fixing cover 22 by a second elastic spring 21. The end of the movable locking block 19 away from the fixing plate 20 is wedge-shaped.

[0071] Specifically, such as Figures 3-6As shown, when the active interface 6 is connected to the plug and the plug pushes the active interface 6 to move inside the fixed box 5, the second conductive copper rod 13 moves synchronously with the active interface 6 and is inserted into the slot of the first conductive copper rod 4. In this way, the second conductive copper rod 13 comes into contact with the first conductive copper rod 4, realizing the conduction between the active interface 6 and the circuit board 2.

[0072] During this process, the sleeve 16 moves synchronously with the guide post 14 and moves along the axial direction of the guide cylinder 15, compressing the first elastic spring 17. The sleeve 16 drives the movable block 19 on it to move. Since the fixed plate 20 has an elastic movable structure in the fixed cover 22 through the second elastic spring 21, the movable block 19 also has an elastic movable structure through the fixed plate 20.

[0073] When the wedge-shaped end of the movable locking block 19 contacts the conical surface of the fixed ring 23, the wedge-shaped end of the movable locking block 19 slides along the conical surface of the fixed ring 23 and is subjected to a thrust, causing the movable locking block 19 to be displaced in the second through groove 18 and pass over the fixed ring 23. After passing over the fixed ring 23, the movable locking block 19 automatically resets. At this time, the plug is released, and under the action of the elastic potential energy of the first elastic spring 17, the sleeve 16 is pushed to move in the opposite direction until the movable locking block 19 abuts against the bottom surface of the fixed ring 23, thus completing the self-locking.

[0074] When high-frequency vibration is transmitted to the movable interface 6 via the plug, the movable interface 6 and the plug as a whole undergo a small displacement within the fixed box 5. This displacement process can reduce the transmission of impact.

[0075] When the plug needs to be unplugged, the movable interface 6 continues to move inside the fixed box 5 by pushing the plug until the wedge-shaped end of the movable block 19 contacts the bottom surface of the movable ring 24. Since the movable ring 24 cannot continue to move with the movable block 19 due to the restriction of the limiting ring 25, the wedge-shaped end of the movable block 19 slides along the bottom edge of the movable ring 24 and is pushed, causing the movable block 19 to be displaced in the second through slot 18 and pass over the movable ring 24. At this time, the movable block 19 is reset and contacts the conical surface of the movable ring 24.

[0076] Then, the plug is pulled out, and the plug moves the movable interface 6. The movable locking block 19 moves the movable ring 24 synchronously until the movable ring 24 is in contact with the bottom surface of the fixed ring 23. At this time, the wedge-shaped end of the movable locking block 19 slides along the conical surface of the movable ring 24 to the conical surface of the fixed ring 23 until the movable locking block 19 passes over the movable ring 24 and the fixed ring 23. At this time, the movable interface 6 extends out from the fixed box 5, and the clamping block 10 resets, making it easy to pull the plug out of the movable interface 6.

[0077] In one specific embodiment of the present invention, the fixing box 5 is open on one side, and a second through hole 8 for the guide cylinder 15 to pass through is also provided on the fixing box 5. The inner wall of the fixing box 5 is in contact with the outer wall of the movable interface 6.

[0078] The temperature detection mechanism includes an electromagnet 28 and a sensor for controlling the opening and closing of the electromagnet 28. The electromagnet 28 is fixed to the inner walls of the top and bottom of the fixing box 5. A magnet is embedded inside the fixing plate 20, and the projection of the magnet is located on the electromagnet 28.

[0079] The temperature detection mechanism also includes a metal sleeve 26 located in the first through hole 7. Multiple metal sleeves 26 are welded and fixed to the heat-conducting plate 27. The inner circular surface of the metal sleeve 26 is in contact with the outer wall of the first conductive copper rod 4, and the heat-conducting plate 27 is in contact with the detection end of the sensor.

[0080] Specifically, such as Figure 4 , Figure 5 and Figure 8 As shown, the sensor uses an NTC thermistor. When operating normally, the temperature on the metal sleeve 26 and the heat-conducting plate 27 remains stable. The NTC thermistor has a large resistance value. The voltage at the non-inverting input of the operational amplifier is lower than the reference voltage at the inverting input. The operational amplifier outputs a low level, the transistor is in the cutoff state, no current flows through the electromagnet 28, and no magnetism is generated.

[0081] When the first conductive copper rod 4 heats up, the heat is transferred to the heat-conducting plate 27 through the metal sleeve 26. The temperature of the heat-conducting plate 27 increases, the resistance of the NTC thermistor decreases, and the voltage at the non-inverting terminal increases. When this voltage exceeds the reference voltage, the operational amplifier outputs a high level, the transistor reaches the saturation conduction state, and the electromagnet 28 is energized and generates magnetism.

[0082] When the electromagnet 28 is energized, since both the fixing plate 20 and the fixing box 5 are made of plastic and do not have the property of blocking magnetism, they will attract the magnet block to move, which in turn will drive the fixing plate 20 to move. The fixing plate 20 drives the movable locking block 19 to move, separating it from the bottom surface of the fixing ring 23. At this time, under the action of the elastic potential energy of the first elastic spring 17, the sleeve 16 is pushed to move in the opposite direction. The sleeve 16 drives the movable interface 6 to pop out from the opening end of the fixing box 5.

[0083] The electromagnet 28 is long and has a large coverage area. During the process of the sleeve 16 driving the movable interface 6 to pop out, the movable block 19 can be attracted by the electromagnet 28 for a certain period of time, thereby ensuring that the movable block 19 will not reset and abut against the fixed ring 23 again in the initial stage of popping out, thus ensuring that the popping operation is completed smoothly.

[0084] In the description of this specification, terms such as "connection," "installation," and "fixation" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meanings of the above terms within this invention based on the specific circumstances.

[0085] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0086] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An Internet of Things (IoT) terminal device, comprising a housing (1) and a circuit board (2) located therein, the circuit board (2) being electrically connected to a movable interface (6) via a connector (3); characterized in that: Multiple fixing boxes (5) are passed through one side wall of the outer shell (1), and a movable interface (6) is inserted inside the fixing box (5). The connector (3) is provided with a plurality of first conductive copper rods (4), and the fixing box (5) is provided with a plurality of first through holes (7) for the first conductive copper rods (4) to pass through. The active interface (6) is provided with a plurality of second conductive copper rods (13) on the side facing the connector (3), and the first conductive copper rod (4) has a slot for inserting the second conductive copper rod (13). The active interface (6) facing the connector (3) is also provided with a self-locking mechanism, and the fixed box (5) is provided with a temperature detection mechanism for the self-locking mechanism to pop out. The self-locking mechanism includes a guide post (14) fixed on the movable interface (6), a guide cylinder (15) fixed on the connector (3), and a sleeve (16) sleeved on the guide post (14). One end of the guide post (14) passes through the sleeve (16) and extends into the guide cylinder (15). A first elastic spring (17) is sleeved on the guide post (14) located outside the sleeve (16). Both ends of the first elastic spring (17) are fixedly bonded to the connector (3) and the sleeve (16). The temperature detection mechanism also includes a metal sleeve (26) located in the first through hole (7). The multiple metal sleeves (26) are welded and fixed to the heat-conducting sheet (27). The inner circular surface of the metal sleeve (26) is in contact with the outer wall of the first conductive copper rod (4). The heat-conducting sheet (27) is in contact with the detection end of the sensor.

2. The Internet of Things (IoT) terminal device according to claim 1, characterized in that: The active interface (6) has a first through groove (9) on the top and bottom wall of the slot. A clamping block (10) is provided in the first through groove (9). The groove wall of the first through groove (9) is fixedly bonded to one end of the metal spring sheet (12). The clamping block (10) has a shaft (11) running through it, and the two ends of the shaft (11) are fixedly connected to the first through groove (9).

3. The Internet of Things (IoT) terminal device according to claim 2, characterized in that: The clamping block (10) is a trapezoidal block. One side of the top surface of the clamping block (10) extends out from the first through groove (9). The inclined surface of the clamping block (10) is fixedly bonded to the other end of the metal spring sheet (12). A rubber pad is bonded to the bottom surface of the clamping block (10).

4. The Internet of Things (IoT) terminal device according to claim 1, characterized in that: The guide cylinder (15) has a fixed ring (23) that is fixedly bonded to the side of the guide post (14). The guide cylinder (15) also has a movable ring (24) that is slidably connected to it. A limiting ring (25) is attached to one side of the movable ring (24). The limiting ring (25) is fitted and bonded to the guide cylinder (15).

5. An IoT terminal device according to claim 4, characterized in that: Both the fixed ring (23) and the movable ring (24) are tapered structures. The diameter of the fixed ring (23) is smaller than that of the movable ring (24). The tapered surface of the fixed ring (23) faces the movable interface (6), and the tapered surface of the movable ring (24) faces the connector (3).

6. An Internet of Things (IoT) terminal device according to claim 1, characterized in that: The sleeve (16) is open on the side facing the movable interface (6), and the open end of the sleeve (16) is fixedly bonded to the movable interface (6). The sleeve (16) has a second through groove (18) for the movable locking block (19) to pass through; a fixing cover (22) is fixedly bonded to the outer wall of the sleeve (16) surrounding the second through groove (18); a fixing plate (20) is integrally formed at one end of the movable locking block (19); the fixing plate (20) is located inside the fixing cover (22); the fixing plate (20) is connected to the inner wall of the fixing cover (22) by a second elastic spring (21); the end of the movable locking block (19) away from the fixing plate (20) is wedge-shaped.

7. An IoT terminal device according to claim 1, characterized in that: The fixing box (5) has an open side and a second through hole (8) for the guide cylinder (15) to pass through. The inner wall of the fixing box (5) is in contact with the outer wall of the movable interface (6).

8. An Internet of Things (IoT) terminal device according to claim 6, characterized in that: The temperature detection mechanism includes an electromagnet (28) and a sensor for controlling the opening and closing of the electromagnet (28). The electromagnet (28) is fixed on the inner walls of the top and bottom of the fixing box (5). A magnet is embedded inside the fixing plate (20), and the projection of the magnet is located on the electromagnet (28).

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