Lightning protection device structure

Abstract

This utility model discloses a lightning protection device structure, including a circuit protection device, a first pin, and a tripping mechanism. The tripping mechanism includes a ceramic housing, second and third pins. The ceramic housing is tightly attached to the circuit protection device. The third pin has a solder foot, a contact section, and a protruding section. The contact section is located on the lower surface of the ceramic housing, the solder foot extends into the ceramic housing, and the protruding section is connected to the rear end of the contact section. The second pin includes a fixed section, an elastic section, and a limiting section. The elastic end is U-shaped, and the front end of the elastic section is soldered to the solder foot with low-temperature tin. An arc-shaped fixing block is provided in the ceramic housing, and the fixed section is wrapped around the arc-shaped fixing block. A limiting groove is provided on the arc-shaped fixing block, and the limiting section is held in the limiting groove. By utilizing the heat generated by the circuit protection device due to overvoltage and overcurrent, the low-temperature tin at the solder foot melts. The elastic section of the second pin, driven by its own elastic storage force, detaches from the solder foot, preventing overheating and combustion, and avoiding damage to electronic equipment by lightning strikes, thus achieving the effects of fire prevention and lightning strike protection.

Description

Technical Field

[0001] This utility model relates to the field of surge protector equipment, and in particular to a surge protector device structure. Background Technology

[0002] Currently, traditional surge protection devices typically use multiple flame-retardant components, such as thermal fuses or quartz sand, to prevent combustion. To achieve true flame protection, surge protection modules with mechanical tripping mechanisms are required to ensure effective tripping.

[0003] Existing surge protection devices using thermal fuses are ineffective at preventing combustion under high current and imperfect manufacturing processes due to the characteristics of thermal fuses. Adding quartz sand and surge protection modules, on the other hand, is costly, complex, and requires significant manpower and resources to achieve the desired surge protection effect. Furthermore, existing surge protection devices are bulky, have poor versatility in power and signal structures, and cannot be used in confined environments, thus limiting their application.

[0004] Therefore, existing surge protection devices should be improved to solve the above problems. Utility Model Content

[0005] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide a surge protection device structure. This structure is formed by combining a tripping mechanism with a circuit protection device and coating the entire structure with an insulating layer. The circuit protection device heats up due to overvoltage or overcurrent, causing the low-temperature solder at the solder joints to melt. The elastic segment of the second pin then detaches from the circuit protection device under the drive of its own elastic stress, preventing overheating and combustion. At the same time, it prevents the connected electronic equipment from being damaged by lightning strikes, achieving the effect of flame protection and also meeting the level of a surge protector.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A surge protection device structure includes a circuit protection device, a first pin, and a tripping mechanism. The tripping mechanism includes a ceramic housing, a second pin, and a third pin mounted on the ceramic housing. The ceramic housing is in close contact with the circuit protection device. The third pin has a solder foot, a contact section, and a protruding section. The contact section is located on the lower surface of the ceramic housing, the solder foot is located at the front end of the contact section and extends upward into the interior of the ceramic housing, and the protruding section is connected to the rear end of the contact section. The second pin includes a fixed section and an elastic section and a limiting section connected to both ends of the fixed section. The elastic section is U-shaped, and a solder joint is formed at the front end of the elastic section. The solder joint is soldered to the solder foot using low-temperature tin. An arc-shaped fixing block is provided in the ceramic housing corresponding to the fixed section, and the fixed section is wound around the arc-shaped fixing block. A limiting groove is provided on the arc-shaped fixing block, and the limiting section is engaged in the limiting groove and extends out of the ceramic housing.

[0008] As a preferred embodiment: the ceramic box body includes a base and a cover, and U-shaped grooves are respectively recessed on the lower surface edges of the base and the cover to facilitate sealing with adhesive.

[0009] As a preferred embodiment: the lower surface of the ceramic housing is provided with a receiving groove for accommodating the contact section of the third pin, and a through hole is provided at the end of the receiving groove. The contact section is located in the receiving groove, and the solder foot extends upward into the interior of the ceramic housing through the through hole.

[0010] As a preferred embodiment: the upper edge of the base is provided with an embedded flange, and the U-shaped groove on the lower surface of the cover is adapted to the embedded flange, and the embedded flange is embedded in the U-shaped groove.

[0011] As a preferred embodiment: the limiting section of the second pin extends out of the outer side of the ceramic housing and forms a signal monitoring terminal for signal monitoring with the protruding section of the third pin.

[0012] As a preferred embodiment: a support block is provided on the inner side of the base corresponding to the elastic segment of the second pin, and the elastic segment abuts against the support block.

[0013] As a preferred embodiment, the circuit protection device is one or a combination of two of the following: a discharge tube, a varistor, a transient suppression diode, a resettable fuse, and a thermistor.

[0014] As a preferred embodiment, the circuit protection device is a varistor.

[0015] As a preferred embodiment, the inner side of the cover has a limiting space corresponding to the deformation of the second pin when it is released.

[0016] As a preferred embodiment: the lower surface of the ceramic box is recessed with a clearance space, and the through hole and the receiving groove are located in the clearance space.

[0017] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, by combining the tripping mechanism with the circuit protection device to form a lightning protection device structure, the circuit protection device heats up due to overvoltage and overcurrent, causing the low-temperature tin at the solder joint to melt. The elastic segment of the second pin is driven by its own elastic stress to detach from the circuit protection device, preventing overheating and combustion, and at the same time avoiding damage to the connected electronic equipment by lightning strikes, thus achieving the effect of fire prevention and also reaching the level of a lightning protector.

[0018] The lightning protection device structure has the following advantages:

[0019] First, it can be integrated with the circuit board using either through-hole or surface mount technology (SMT), resulting in a smaller overall size, reducing a significant amount of through-hole and surface mount work, and saving board layout space.

[0020] Secondly, the tripping mechanism adopts a mechanical tripping method, which makes the tripping effect safer and more reliable.

[0021] Third, it adopts a highly integrated design, making selection simple, convenient, and highly flexible.

[0022] Fourth, it has two-pin and three-pin solutions. The two-pin solution can directly replace the traditional solution without modifying the circuit board; the three-pin solution has a remote signaling (signal monitoring end) and can be linked with the user's equipment. In case of damage or failure, it can provide timely feedback on the product status to the user through the communication function of the user's equipment, realizing the effect of intelligent notification management.

[0023] To more clearly illustrate the structural features and effects of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the lightning protection device of this utility model;

[0025] Figure 2 This is a three-dimensional structural diagram of the lightning protection device of this utility model from another perspective;

[0026] Figure 3 This is a cross-sectional schematic diagram of the lightning protection device of this utility model;

[0027] Figure 4 This is an exploded perspective view of the lightning protection device of this utility model;

[0028] Figure 5 This is a further exploded perspective view of the lightning protection device of this utility model;

[0029] Figure 6 for Figure 5 Another perspective of the exploded three-dimensional schematic diagram of lightning protection devices;

[0030] Figure 7 This is a schematic diagram showing the connection state between the second pin and the solder pad of this utility model;

[0031] Figure 8 This is a schematic diagram of the second pin detaching from the solder joint in the failure state of this utility model;

[0032] Figure 9 This is a perspective view of another embodiment of the present invention with the third pin not extended.

[0033] Figure 10 This is an exploded perspective view of another embodiment of the present invention with the third pin not extended.

[0034] Explanation of reference numerals in the attached diagram:

[0035] 10. Circuit protection device; 20. First pin; 30. Tripping mechanism; 31. Ceramic housing; 311. Arc-shaped fixing block; 312. Limiting groove; 313. Base; 3131. Embedded flange; 3132. Notch; 3133. Recessed space; 3134. Support block; 314. Cover; 3141. Limiting space; 315. U-shaped groove; 316. Receiving groove; 317. Through hole; 32. Second pin; 321. Fixing section; 322. Elastic section; 323. Limiting section; 324. Welding part; 33. Third pin; 331. Weld foot; 332. Contact section; 333. Extending section. Detailed Implementation

[0036] This utility model is as follows Figures 1 to 8 As shown, a surge protection device structure includes a circuit protection device 10, a first pin 20, and a tripping mechanism 30, wherein:

[0037] The tripping mechanism 30 includes a ceramic housing 31, a second pin 32 and a third pin 33 mounted on the ceramic housing 31. The ceramic housing 31 is in close contact with the circuit protection device 10. The third pin 33 has a solder foot 331, a contact section 332 and a protruding section 333. The contact section 332 is located on the lower surface of the ceramic housing 31 to transfer the heat generated by the circuit protection device 10 to the solder foot 331. The solder foot 331 is located at the front end of the contact section 332 and extends upward into the interior of the ceramic housing 31. The protruding section 333 is connected to the rear end of the contact section 332. The second pin 32 includes a fixed section 321 and an elastic section 322 and a limiting section 323 connected to both ends of the fixed section 321. The elastic section is U-shaped. A welding portion 324 is formed at the front end of segment 322. The welding portion 324 is soldered to the solder foot 331 by low-temperature tin welding. The welding portion 324 has a bent structure adapted to the solder foot 331 to fully contact the solder foot 331. An arc-shaped fixing block 311 is provided in the ceramic box 31 corresponding to the fixing segment 321. The fixing segment 321 is wrapped around the arc-shaped fixing block 311. A limiting groove 312 is provided on the arc-shaped fixing block 311. The limiting segment 323 is held in the limiting groove 312 and extends out of the outside of the ceramic box 31. Specifically, a notch 3132 is provided on the edge of the base 313 corresponding to the limiting groove 312. The rear end of the limiting segment 323 of the second pin 32 extends out of the outside of the base 313 through the notch 3132.

[0038] The ceramic box body 31 includes a base 313 and a cover 314. U-shaped grooves 315 are recessed on the lower edges of the base 313 and the cover 314 to facilitate sealing with adhesive. Adhesive enters the U-shaped grooves 315, and the structure of the U-shaped grooves 315 makes the connection between the base 313 and the cover 314, as well as between the base 313 and the circuit protection device 10, tighter, improving the sealing performance. An embedded flange 3131 is provided on the upper edge of the base 313. The U-shaped groove 315 on the lower surface of the cover 314 is adapted to the embedded flange 3131, and the embedded flange 3131 is embedded in the U-shaped groove 315, ensuring a stable fit between the base 313 and the cover 314. A support block 3134 is provided on the inner side of the base 313 corresponding to the elastic segment 322 of the second pin 32. The elastic segment 322 abuts against the support block 3134, and the support block 3134 can support the elastic segment 322, thereby improving the stability of the elastic segment 322.

[0039] The limiting segment 323 of the second pin 32 extends out of the outer side of the ceramic housing 31 and forms a signal monitoring end for signal monitoring with the protruding segment 333 of the third pin 33. The inner side of the cover 314 has a limiting space 3141 corresponding to the deformation of the second pin 32 when it is released, so as to meet the space requirements for the second pin 32 to perform the release action.

[0040] The lower surface of the ceramic housing 31 is provided with a receiving groove 316 for accommodating the contact section 332 of the third pin 33. A through hole 317 is provided at the end of the receiving groove 316. The contact section 332 is located in the receiving groove 316. The solder foot 331 extends upward into the interior of the ceramic housing 31 through the through hole 317. The lower surface of the base 313 is recessed with a clearance space 3133. The through hole 317 and the receiving groove 316 are located in the clearance space 3133 to reduce the bonding thickness between the ceramic housing 31 and the circuit protection device 10. The circuit protection device 10 is one or a combination of two of the following: a discharge tube, a varistor, a transient suppression diode, a resettable fuse, and a thermistor. In this embodiment, the circuit protection device 10 is a varistor.

[0041] In another embodiment of this utility model, the third pin 33 is designed not to extend beyond the ceramic housing 31, as shown below. Figure 9 , 10 As shown.

[0042] The signal monitoring terminal can change the circuit state between the second pin 32 and the third pin 33 when the varistor fails, thus it can be used to monitor whether the varistor is working properly.

[0043] Normal state: When the varistor is working normally, the second pin 32 is connected to the first pin 20, transmitting voltage to the rest of the circuit. At this time, the third pin 33 does not participate in the voltage transmission of the circuit, but is used to monitor the state of the varistor.

[0044] Failure Condition: When the varistor fails due to overvoltage, surge voltage, or aging, the connection between pin 20 and pin 32 will be broken to prevent current from continuing to flow to the rest of the circuit, thus avoiding further damage. In this case, the circuit state between pin 32 and pin 33 will change, for example, forming an open circuit or a low-impedance path. This change can be used to indicate that the varistor has failed.

[0045] This monitoring mechanism can be implemented in the following ways:

[0046] Voltage monitoring: Under normal operating conditions, the voltage between pin 32 and pin 33 is zero or a specific value. When the varistor fails, this voltage value will change, and the state of the varistor can be detected by monitoring this voltage change.

[0047] Current monitoring: When the varistor fails, the current between the second pin 32 and the third pin 33 will increase because the current will flow through the third pin 33 to the monitoring circuit, thereby triggering an alarm or protection mechanism.

[0048] Resistance monitoring: By measuring the resistance between the second pin 32 and the third pin 33, it is possible to detect whether the varistor is malfunctioning.

[0049] This signal monitoring mechanism can be connected to external protection circuits or control systems. When a varistor failure is detected, it automatically cuts off the power supply or triggers other protective measures to protect the safety of the circuit and equipment.

[0050] The working principle of the lightning protection device is as follows:

[0051] When the circuit protection device 10 encounters a lightning strike that generates high temperatures, or when the varistor malfunctions (varistor aging, overvoltage, or surge voltage), the varistor will continuously heat up. When the temperature reaches the low-temperature tin softening state, the low-temperature tin at the solder joint 331 melts, and the solder part 324 (U-shaped structure, normally closed when not soldered) on the elastic section 322 of the second pin 32... Figure 8 As shown, during welding, the elastic segment 322 is bent into a U-shape and welded to the side wall of the weld leg 331 facing the fixed segment 321 to facilitate detachment. Figure 7 (As shown) Under the driving force of its own elastic stress, it will disconnect from the solder joint 331, thereby timely interrupting the current and preventing the varistor from generating an open flame due to overheating. The first pin 20 and the second pin 32 disconnect the circuit, cutting off the circuit of the device connected to the second pin 32 and preventing further damage. At the same time, the signal monitoring terminal is formed between the second pin 32 and the third pin 33, providing timely feedback on the device status to the user.

[0052] The key design feature of this invention is that by combining the tripping mechanism with the circuit protection device to form a surge protection device structure, the circuit protection device heats up due to overvoltage and overcurrent, causing the low-temperature solder at the solder joint to melt. The elastic segment of the second pin is driven by its own elastic stress to detach from the circuit protection device, preventing overheating and combustion, and at the same time avoiding damage to the connected electronic equipment by lightning strikes, thus achieving the effect of flame protection and also reaching the level of a surge protector.

[0053] The lightning protection device structure has the following advantages:

[0054] First, it can be integrated with the circuit board using either through-hole or surface mount technology (SMT), resulting in a smaller overall size, reducing a significant amount of through-hole and surface mount work, and saving board layout space.

[0055] Secondly, the tripping mechanism adopts a mechanical tripping method, which makes the tripping effect safer and more reliable.

[0056] Third, it adopts a highly integrated design, making selection simple, convenient, and highly flexible.

[0057] Fourth, it has two-pin and three-pin solutions. The two-pin solution can directly replace the traditional solution without modifying the circuit board; the three-pin solution has a remote signaling (signal monitoring end) and can be linked with the user's equipment. In case of damage or failure, it can provide timely feedback on the product status to the user through the communication function of the user's equipment, realizing the effect of intelligent notification management.

[0058] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A lightning protection device structure, characterized by: The device includes a circuit protection device, a first pin, and a tripping mechanism. The tripping mechanism includes a ceramic housing, a second pin, and a third pin mounted on the ceramic housing. The ceramic housing is in close contact with the circuit protection device. The third pin has a solder foot, a contact section, and a protruding section. The contact section is located on the lower surface of the ceramic housing, the solder foot is located at the front end of the contact section and extends upward into the interior of the ceramic housing, and the protruding section is connected to the rear end of the contact section. The second pin includes a fixed section and an elastic section and a limiting section connected to both ends of the fixed section. The elastic section is U-shaped, and a solder joint is formed at the front end of the elastic section. The solder joint is soldered to the solder foot using low-temperature tin. An arc-shaped fixing block is provided in the ceramic housing corresponding to the fixed section, and the fixed section is wound around the arc-shaped fixing block. A limiting groove is provided on the arc-shaped fixing block, and the limiting section is engaged in the limiting groove and extends out of the ceramic housing.

2. The lightning protection device structure according to claim 1, characterized in that: The ceramic box includes a base and a cover, and U-shaped grooves are recessed on the lower surface edges of the base and the cover to facilitate sealing with adhesive.

3. The lightning protection device structure according to claim 1, characterized in that: The lower surface of the ceramic housing is provided with a receiving groove for accommodating the contact section of the third pin. A through hole is provided at the end of the receiving groove, the contact section is located in the receiving groove, and the solder foot extends upward into the interior of the ceramic housing through the through hole.

4. The lightning protection device structure according to claim 2, characterized in that: The upper edge of the base is provided with an embedded flange, and the U-shaped groove on the lower surface of the cover is adapted to the embedded flange, and the embedded flange is embedded in the U-shaped groove.

5. The lightning protection device structure according to claim 2, wherein: The limiting section of the second pin extends out of the outer part of the ceramic housing and forms a signal monitoring end for signal monitoring with the protruding section of the third pin.

6. The lightning protection device structure according to claim 2, wherein: A support block is provided on the inner side of the base corresponding to the elastic segment of the second pin, and the elastic segment abuts against the support block.

7. The lightning protection device structure according to claim 1, characterized in that: The circuit protection device is one of the following: a discharge tube, a varistor, a transient suppression diode, a resettable fuse, and a thermistor, or a combination of two of them.

8. The lightning protection device structure of claim 1, wherein: The circuit protection device is a varistor.

9. The lightning protection device structure according to claim 2, wherein: The inner side of the cover has a limiting space corresponding to the deformation of the second pin when it is released.

10. The lightning protection device structure according to claim 3, wherein: The lower surface of the ceramic box is recessed with a clearance space, and the through hole and the receiving groove are located in the clearance space.

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