TVS device with automatic open circuit protection function

Abstract

The utility model relates to electronic protector technical field, concretely is a kind of TVS device with automatic open circuit protection function, including device body, automatic open circuit protection mechanism and pin connecting mechanism, and automatic open circuit protection mechanism and pin connecting mechanism are fixedly connected in the inside of device body, in the utility model, through the setting of fusible wire, temperature sensor and memory alloy spring, the automatic open circuit protection of TVS device when encountering abnormal overcurrent or overvoltage is realized, fusible wire can rapidly fuse, and timely cut off circuit connection, prevent the further expansion of fault range, temperature sensor real-time monitoring temperature, when temperature abnormally rises, memory alloy spring will rapidly change under the signal driving of temperature sensor, the pressure generated by its deformation can assist fusible wire to fuse more quickly when reaching fusing temperature, greatly shorten the response time of automatic open circuit protection, greatly improve the security and reliability of circuit.

Description

Technical Field

[0001] This utility model relates to the field of electronic protector technology, and in particular to a TVS device with automatic open-circuit protection function. Background Technology

[0002] In today's era of widespread electronic devices, circuit protection is of paramount importance. TVS (Transient Voltage Suppressor) devices, as key components of circuit protection, can effectively cope with various abnormal overvoltages that occur in circuits, such as overvoltages caused by electrostatic discharge (ESD), inductive coupling, and sudden switching, thus protecting sensitive components in the circuit.

[0003] In existing technical solutions, TVS devices may be damaged due to excessive energy. If a TVS device is damaged and cannot be automatically opened in time, it may cause a short circuit, which may affect the normal operation of the entire electronic device, or even cause more serious malfunctions, resulting in equipment damage or safety accidents.

[0004] To address the above problems, this utility model provides a TVS device with automatic open-circuit protection function. Utility Model Content

[0005] The purpose of this invention is to solve the problem that TVS devices in the prior art cannot automatically open the circuit after damage, which easily leads to circuit failure, and proposes a TVS device with automatic open-circuit protection function.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a TVS device with automatic open-circuit protection function, comprising a device body, an automatic open-circuit protection mechanism and a pin connection mechanism, wherein the automatic open-circuit protection mechanism and the pin connection mechanism are fixedly connected inside the device body, and the automatic open-circuit protection mechanism includes an insulating isolation gasket.

[0007] The automatic open-circuit protection mechanism includes a fuse component and a temperature sensing component. The fuse component includes a fusible metal wire, and the temperature sensing component includes a temperature sensor.

[0008] The fusible assembly and the temperature sensing assembly are fixedly connected inside the device body. The fusible assembly includes a fusible base threaded to the top of the device body. The fusible metal wire is fixedly connected inside the fusible base. Conductive connectors are fixedly connected to both ends of the fusible metal wire. Limiting components are threaded to both sides of the conductive connectors. The conductive connectors are threaded to both sides of the fusible base through the limiting components.

[0009] Furthermore, bolts are threadedly connected to both sides of the fuse base, and the fuse base is threadedly connected to the center of the top of the device body via bolts.

[0010] Furthermore, a protective cover is threadedly connected to the top of the fuse base, and fasteners are threadedly connected to both sides of the protective cover. The protective cover is threadedly connected to the top of the fuse base through the fasteners, and an insertion slot is provided at the center of the top of the protective cover.

[0011] Furthermore, the temperature sensing component includes temperature sensors fixedly connected to the four corners of the top of the device body, and connecting wires are fixedly connected to the top of the temperature sensors. The temperature sensors and connecting wires are arranged at the four corners of the fuse assembly.

[0012] Furthermore, the distal ends of the four connecting wires are fixedly connected to shape memory alloy springs. The shape memory alloy springs have connecting through holes on both sides. The shape memory alloy springs are snapped onto the outer surface of the fusible metal wire through the connecting through holes. The shape memory alloy springs are snapped onto the top of the protective cover through the insertion slot.

[0013] Furthermore, the pin connection mechanism includes pin seats threaded to both sides of the device body, with connection pins fixedly connected inside the pin seats. One end of the connection pin is connected to a conductive connector, and the other end of the connection pin extends to the outside of the device body.

[0014] Furthermore, fasteners are threaded to both sides of the pin holder, and the pin holder is threaded to both sides of the device body through the fasteners.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0016] 1. In this utility model, by setting up a fusible metal wire, a temperature sensor, and a shape memory alloy spring, automatic open-circuit protection is achieved for the TVS device when encountering abnormal overcurrent or overvoltage. When a continuous overvoltage or excessive current occurs in the circuit, the fusible metal wire can quickly melt and disconnect the circuit connection in time, preventing the fault range from expanding further. The temperature sensor monitors the temperature in real time. When the temperature rises abnormally, the shape memory alloy spring will deform rapidly under the signal drive of the temperature sensor. The pressure generated by its deformation can assist the fusible metal wire to melt more quickly when it reaches the melting temperature, which greatly shortens the response time of automatic open-circuit protection, effectively avoids circuit short-circuit faults caused by TVS device damage, and greatly improves the safety and reliability of the circuit.

[0017] 2. In this utility model, the protective performance and connection stability of the device are enhanced by the setting of insulating isolation gaskets, connecting pins, and protective covers. The connecting pins ensure smooth current transmission, while the fasteners further enhance the firmness of the connection between the pin holder and the device body, preventing loosening during use. The insulating isolation gaskets prevent metal spatter from affecting other components inside the device body, avoiding safety hazards such as short circuits, and providing a reliable guarantee for the safe and stable operation of the TVS device. The connecting pins ensure the effectiveness of the connection with external circuits, and the protective cover protects the internal components of the fuse assembly, improving the performance and service life of the entire TVS device. Attached Figure Description

[0018] Figure 1 A three-dimensional structural diagram of a TVS device with automatic open-circuit protection function is provided for this utility model.

[0019] Figure 2 This invention presents a schematic diagram of the structure of a temperature sensor in a TVS device with automatic open-circuit protection function;

[0020] Figure 3 This invention proposes a TVS device with automatic open-circuit protection function. Figure 2 Enlarged view of point A;

[0021] Figure 4 This invention provides a schematic diagram of the structure of a shape memory alloy spring in a TVS device with automatic open-circuit protection function;

[0022] Figure 5 This invention proposes a TVS device with automatic open-circuit protection function. Figure 4 Enlarged diagram at point B

[0023] Figure 6 This invention provides a schematic diagram of the structure of a fusible metal wire in a TVS device with automatic open-circuit protection function;

[0024] Figure 7 This invention proposes a TVS device with automatic open-circuit protection function. Figure 6 Enlarged diagram of point C.

[0025] Legend:

[0026] 1. Device body; 2. Automatic open-circuit protection mechanism; 21. Fuse assembly; 211. Fusible metal wire; 212. Fuse base; 213. Conductive connector; 214. Limiting component; 215. Bolt; 216. Protective cover; 217. Fixing component; 218. Socket slot; 22. Temperature sensing assembly; 221. Temperature sensor; 222. Connecting wire; 223. Memory alloy spring; 224. Connecting through hole; 23. Insulating washer; 3. Pin connection mechanism; 31. Pin socket; 32. Connecting pin; 33. Fastener. Detailed Implementation

[0027] Please see Figure 1-7 This utility model provides a technical solution: a TVS device with automatic open circuit protection function, including a device body 1, an automatic open circuit protection mechanism 2 and a pin connection mechanism 3. The automatic open circuit protection mechanism 2 and the pin connection mechanism 3 are fixedly connected inside the device body 1. The automatic open circuit protection mechanism 2 includes an insulating isolation gasket 23.

[0028] The following section will explain the specific settings and functions of its automatic open-circuit protection mechanism 2 and pin connection mechanism 3.

[0029] In this embodiment: the automatic open circuit protection mechanism 2 includes a fuse component 21 and a temperature sensing component 22. The fuse component 21 includes a fusible metal wire 211, and the temperature sensing component 22 includes a temperature sensor 221.

[0030] The fuse assembly 21 and the temperature sensing assembly 22 are fixedly connected inside the device body 1. The fuse assembly 21 includes a fuse base 212 threadedly connected to the top of the device body 1, a fusible metal wire 211 fixedly connected inside the fuse base 212, and conductive connectors 213 fixedly connected to both ends of the fusible metal wire 211. Limiting members 214 are threadedly connected to both sides of the conductive connectors 213, and the conductive connectors 213 are threadedly connected to both sides of the fuse base 212 through the limiting members 214.

[0031] The aforementioned components achieve the following effects: the fuse base 212 provides a stable and precise mounting position for the fusible metal wire 211, ensuring that the fusible metal wire 211 is in a stable working state during normal operation of the TVS device and will not be displaced due to external forces or vibrations. When an abnormal continuous overvoltage or excessive current occurs in the circuit, the temperature of the fusible metal wire 211 will rise sharply due to the current heating effect. Once it reaches its melting temperature, the metal wire will melt rapidly, thereby cutting off the circuit and realizing automatic open-circuit protection, effectively preventing further damage to other sensitive components in the circuit by the fault current.

[0032] Specifically, bolts 215 are threaded on both sides of the fuse base 212, and the fuse base 212 is threaded to the center of the top of the device body 1 by the bolts 215.

[0033] The effects achieved by the above components are as follows: the setting of bolt 215 makes the connection between the fuse base 212 and the device body 1 more secure and reliable. The threaded connection not only provides strong mechanical connection strength, but also makes it easy and quick to disassemble and reinstall the fuse base 212 when maintenance, repair or replacement of the fuse assembly 21 is required. Installing the fuse base 212 at the center of the top of the device body 1 helps to form a symmetrical and stable structural layout inside the entire device, making the current transmission and temperature distribution more uniform, and improving the stability and reliability of the fuse assembly 21.

[0034] Specifically, a protective cover 216 is threadedly connected to the top of the fuse base 212, and fasteners 217 are threadedly connected to both sides of the protective cover 216. The protective cover 216 is threadedly connected to the top of the fuse base 212 through the fasteners 217, and an insertion slot 218 is provided at the center of the top of the protective cover 216.

[0035] The effects achieved by the above components are as follows: the protective cover 216 can provide physical protection for the fusible metal wire 211 and conductive connector 213 inside the fuse base 212, effectively preventing external contaminants such as dust, impurities, and moisture from entering the fuse base 212 and avoiding these contaminants from affecting the normal working performance of the fuse assembly 21. The insertion slot 218 opened at the center of the top of the protective cover 216 provides a precise installation and positioning interface for the shape memory alloy spring 223 in the subsequent temperature sensing assembly 22, so that the shape memory alloy spring 223 can achieve precise and stable cooperation with the fusible metal wire 211, thereby effectively improving the collaborative working performance of the entire automatic open circuit protection mechanism 2.

[0036] Specifically, the temperature sensing component 22 includes a temperature sensor 221 fixedly connected to the four corners of the top of the device body 1, and a connecting wire 222 fixedly connected to the top of the temperature sensor 221. The temperature sensor 221 and the connecting wire 222 are set at the four corners of the fuse component 21.

[0037] The aforementioned components achieve the following effect: temperature sensors 221 are installed at the four corners of the top of the device body 1, enabling real-time and comprehensive monitoring of temperature changes inside the device body 1 from multiple directions. Compared to installing temperature sensors 221 at only a single location, this distributed layout can more accurately sense temperature differences in different areas inside the device, avoiding situations where localized high temperatures go undetected, thus greatly improving the accuracy and reliability of temperature monitoring. The connecting line 222 is responsible for transmitting the temperature signals collected by the temperature sensors 221 to the subsequent shape memory alloy spring 223, ensuring stable and reliable signal transmission within the temperature sensing component 22, laying the foundation for achieving rapid and accurate temperature response and automatic open-circuit protection functions.

[0038] Specifically, the far ends of the four connecting wires 222 are fixedly connected to shape memory alloy springs 223. The shape memory alloy springs 223 have connecting through holes 224 on both sides. The shape memory alloy springs 223 are snapped onto the outer surface of the fusible metal wire 211 through the connecting through holes 224. The shape memory alloy springs 223 are snapped onto the top of the protective cover 216 through the insertion slot 218.

[0039] The effects achieved by the above components are as follows: The shape memory spring 223 has a unique shape memory effect. When the temperature sensor 221 detects that the internal temperature of the device body 1 rises to a certain threshold, the temperature signal transmitted through the connecting wire 222 will cause the shape memory spring 223 to change shape. Since the shape memory spring 223 is snapped onto the outer surface of the fusible metal wire 211 through the connecting through hole 224, its shape change will apply additional pressure to the fusible metal wire 211, assisting the fusible metal wire 211 to melt more quickly when it reaches the melting temperature, significantly shortening the response time of the automatic open circuit protection and improving the protection efficiency. At the same time, the shape memory spring 223 is snapped onto the top of the protective cover 216 through the insertion slot 218, which not only ensures the stability of its installation, but also ensures that it can accurately play an auxiliary melting role on the fusible metal wire 211 during temperature changes, thereby improving the collaborative working efficiency of the entire automatic open circuit protection mechanism 2.

[0040] Specifically, the pin connection mechanism 3 includes pin seats 31 threaded to both sides of the device body 1. A connection pin 32 is fixedly connected inside the pin seat 31. One end of the connection pin 32 is connected to the conductive connector 213, and the other end of the connection pin 32 extends to the outside of the device body 1.

[0041] The effects achieved by the above components are as follows: the pin base 31 is firmly installed on both sides of the device body 1 by means of threaded connection, providing a stable and reliable mounting base for the connecting pin 32. During the operation of the TVS device, the pin base 31 can withstand the current transmitted by the connecting pin 32 and the mechanical stress that may be generated when connecting to the external circuit, ensuring that the connection between the connecting pin 32 and the device body 1 remains stable. As a key component for the TVS device to achieve electrical connection with the external circuit, one end of the connecting pin 32 is connected to the conductive connector 213 in the fuse assembly 21, ensuring the continuity of current transmission between the internal circuit and the external circuit. The other end extends to the outside of the device body 1, which facilitates convenient connection with various external circuits, such as soldering to a circuit board, so that the TVS device can be effectively connected to the target circuit and play its role in protecting the circuit.

[0042] Specifically, fasteners 33 are threaded to both sides of the pin holder 31, and the pin holder 31 is threaded to both sides of the device body 1 through the fasteners 33.

[0043] The effects achieved by the above components are as follows: Fastener 33 further enhances the firmness of the connection between pin socket 31 and device body 1. In the actual use of TVS device, it may be affected by various factors such as vibration, impact, and temperature change. Fastener 33 can prevent pin socket 31 from loosening under the action of these factors, ensuring the stability and reliability of pin connection mechanism 3 in long-term use. Even in complex working environment, it can ensure that the electrical connection between pin 32 and external circuit is always in good condition, avoiding problems such as poor contact and increased resistance caused by pin loosening, thereby ensuring the normal functioning of TVS device in circuit protection.

[0044] Working principle: When the TVS device is working normally, the current in the circuit flows into the device body 1 through the connection pin 32, is transmitted to the fusible metal wire 211 through the conductive connector 213, and then flows out through another conductive connector 213 and the connection pin 32, realizing the normal protection function of the circuit. At this time, the temperature sensor 221 monitors the internal temperature of the device body 1 in real time. Since the current is within the normal range, the internal temperature of the device is also kept at a normal level. The shape memory alloy spring 223 maintains its initial shape and does not apply additional pressure to the fusible metal wire 211.

[0045] When an abnormal situation occurs in the circuit, such as continuous overvoltage or excessive current, the heat generated by the current passing through the fusible metal wire 211 will cause the internal temperature of the device body 1 to rise rapidly. The temperature sensors 221 distributed at the four corners of the top of the device body 1 can quickly sense the temperature change and transmit the temperature signal to the shape memory alloy spring 223 through the connecting wire 222. When the temperature rises to the specific transition temperature of the shape memory alloy spring 223, the shape memory alloy spring 223 changes shape and applies additional pressure to the fusible metal wire 211 through the connecting through hole 224.

[0046] Meanwhile, due to the current heating effect, the temperature of the fusible metal wire 211 continues to rise. When it reaches its melting temperature, under the combined action of its own heat and the pressure applied by the shape memory alloy spring 223, the fusible metal wire 211 melts rapidly, thereby cutting off the circuit and realizing automatic open circuit protection. At this time, the insulating washer 23 effectively prevents metal spatter generated during the melting process from damaging other components inside the device body 1. The pin connection mechanism 3 remains stable, waiting for the fault to be eliminated before repairing or replacing the relevant components of the TVS device.

Claims

1. A TVS device with automatic open-circuit protection function, comprising a device body (1), an automatic open-circuit protection mechanism (2), and a pin connection mechanism (3), characterized in that: The automatic open circuit protection mechanism (2) and the pin connection mechanism (3) are fixedly connected to the inside of the device body (1). The automatic open circuit protection mechanism (2) includes an insulating isolation gasket (23). The automatic open circuit protection mechanism (2) includes a fuse assembly (21) and a temperature sensing assembly (22). The fuse assembly (21) includes a fusible metal wire (211), and the temperature sensing assembly (22) includes a temperature sensor (221). The fuse assembly (21) and the temperature sensing assembly (22) are fixedly connected inside the device body (1). The fuse assembly (21) includes a fuse base (212) threaded to the top of the device body (1). The fusible metal wire (211) is fixedly connected inside the fuse base (212). The two ends of the fusible metal wire (211) are fixedly connected to conductive connectors (213). The two sides of the conductive connector (213) are threaded to limiters (214). The conductive connector (213) is threaded to the two sides of the fuse base (212) through the limiters (214).

2. A TVS device with automatic open-circuit protection function according to claim 1, characterized in that: The fuse base (212) is threaded with bolts (215) on both sides, and the fuse base (212) is threaded to the center of the top of the device body (1) by the bolts (215).

3. A TVS device with automatic open-circuit protection function according to claim 2, characterized in that: The top of the fuse base (212) is threaded with a protective cover (216), and the two sides of the protective cover (216) are threaded with fasteners (217). The protective cover (216) is threaded to the top of the fuse base (212) through the fasteners (217). A slot (218) is provided at the center of the top of the protective cover (216).

4. A TVS device with automatic open-circuit protection function according to claim 1, characterized in that: The temperature sensing component (22) includes a temperature sensor (221) which is fixedly connected to the four corners of the top of the device body (1). A connecting wire (222) is fixedly connected to the top of the temperature sensor (221). The temperature sensor (221) and the connecting wire (222) are set at the four corners of the fuse component (21).

5. A TVS device with automatic open-circuit protection function according to claim 4, characterized in that: The far ends of the four connecting wires (222) are fixedly connected to shape memory alloy springs (223). The shape memory alloy springs (223) have connecting through holes (224) on both sides. The shape memory alloy springs (223) are snapped onto the outer surface of the fusible metal wire (211) through the connecting through holes (224). The shape memory alloy springs (223) are snapped onto the top of the protective cover (216) through the insertion slot (218).

6. A TVS device with automatic open-circuit protection function according to claim 1, characterized in that: The pin connection mechanism (3) includes pin seats (31) threaded to both sides of the device body (1). A connection pin (32) is fixedly connected inside the pin seat (31). One end of the connection pin (32) is connected to the conductive connector (213), and the other end of the connection pin (32) extends to the outside of the device body (1).

7. A TVS device with automatic open-circuit protection function according to claim 6, characterized in that: Fasteners (33) are threaded to both sides of the pin holder (31), and the pin holder (31) is threaded to both sides of the device body (1) by the fasteners (33).

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