TVS diode with over-temperature protection function

Abstract

The utility model discloses a TVS diode with an over-temperature protection function, comprising a protection shell, two sides of the protection shell are fixedly connected with hollow side plates, the bottom of the protection shell is provided with a circular groove, the interior of the circular groove is fixedly connected with a liquid storage capsule used for storing an organic solution, the outer side of the liquid storage capsule is a corrugated pipe structure, and the outer side of the corrugated pipe structure is provided with an over-temperature protection cover. The bottom of the liquid storage capsule is fixedly connected with a mounting piece, the bottom end of the hollow side plate is fixedly connected with a plug connector, and the bottoms of the two ends of the mounting piece are fixedly connected with protective pipes corresponding to the plug connector in position. The liquid storage capsule can be protected through the arrangement of the circular groove, after the liquid storage capsule is heated to expand, the protective shell is supported through the corrugated pipe structure on the outer side of the liquid storage capsule, the liquid storage capsule can conveniently and rapidly dissipate heat, meanwhile, the liquid storage capsule is located on the outer side of the protective shell, and the heat dissipation effect is good. And when the liquid storage capsule leaks, internal devices of the protective shell cannot be damaged, and the safety of the device is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of TVS diodes, and specifically relates to a TVS diode with an over-temperature protection function. Background Art

[0002] A transient voltage suppression diode, also known as a TVS diode, is a protective electronic component that can protect electrical equipment from voltage spikes introduced by wires. The TVS diode is connected in parallel with the circuit to be protected. When its voltage exceeds the breakdown level, it directly diverts excessive current. The TVS diode is a clamper that suppresses overvoltage exceeding its breakdown voltage. When the overvoltage disappears, the TVS diode automatically returns to its original state, and the energy it absorbs is much larger than that of a similar-rated crowbar circuit. The TVS diode has a working principle similar to that of a common voltage-regulating diode. If the voltage across both ends is higher than the breakdown voltage marked on it, the TVS diode will conduct. Compared with the voltage-regulating diode, the TVS diode has a higher current conduction ability.

[0003] In the prior art, Chinese Patent CN219393393U discloses a TVS diode with an over-temperature protection function, which relates to the technical field of sensor housings. It includes a diode body. Two mounting holes are opened on one side surface of the diode body. Springs are fixedly connected to the inner wall surfaces of the two mounting holes. One end of each of the two springs is fixedly connected to a metal sheet. In this utility model, when the organic solution is heated, its volume expands. When it reaches the specified temperature, it pushes the push rod to move upward inside the sleeve, and then pushes the metal sheet to move upward, causing the spring to be compressed. The metal sheet is separated from the pin in a fitting state, so that the diode body is powered off. When the temperature of the diode body drops, the volume of the organic solution shrinks, and the spring pushes the metal sheet to reset. The sealing rubber pad fills the gap between the sleeve and the push rod to ensure the sealing performance between the sleeve and the push rod. The installation groove provides a supporting force for the sealing rubber pad to prevent the sealing rubber pad from shifting under force and avoid damage to the diode body due to excessive temperature.

[0004] However, in actual use, the TVS diode provided in the above technical solution still has many disadvantages. For example, the organic solution is located inside the TVS diode, and it takes a long time for the temperature to drop after heating and expansion, which affects the normal use of the TVS diode. Moreover, once the organic solution leaks, it is easy to damage the TVS diode, resulting in poor safety. Summary of the Utility Model

[0005] The purpose of this part is to outline some aspects of the embodiments of the present utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract of the specification and the title of the utility model of this application, to avoid obscuring the purpose of this part, the abstract of the specification, and the title of the utility model. However, such simplifications or omissions shall not be used to limit the scope of the present utility model.

[0006] To solve the problem that the organic solution in the TVS diode in the above-mentioned background technology is located inside the TVS diode, and it takes a long time for the temperature to drop after thermal expansion, which affects the normal use of the TVS diode, and the TVS diode is easily damaged after the organic solution leaks, resulting in poor safety, the present utility model adopts the following technical solutions.

[0007] A TVS diode with an over-temperature protection function includes a protective shell. Hollow side plates are fixedly connected to both sides of the protective shell. A circular groove is opened at the bottom of the protective shell, and a liquid storage capsule for storing organic solution is fixedly connected inside the circular groove. The outer side of the liquid storage capsule is of a corrugated pipe structure. An installation piece is fixedly connected to the bottom of the liquid storage capsule. A plug-in part is fixedly connected to the bottom end of the hollow side plate. Protective pipes corresponding to the positions of the plug-in parts are fixedly connected to the bottoms of both ends of the installation piece. A pin is fixedly connected to the bottom end of the protective pipe. The inner diameter dimension of the protective pipe matches the outer diameter dimension of the pin. A spring is arranged between the installation piece and the hollow side plate, and both ends of the spring are fixedly connected to the installation piece and the hollow side plate respectively.

[0008] Preferably, the vertical center line of the protective shell coincides with the central axis of the circular groove. The hollow side plate is communicated with the inside of the protective shell, and the hollow side plates are symmetric about the vertical center line of the protective shell.

[0009] Preferably, a plurality of heat dissipation grooves are opened on the outer side of the protective shell, and the plurality of heat dissipation grooves are evenly distributed in a ring shape about the vertical center line of the protective shell.

[0010] Preferably, a plurality of mesh holes are opened on the top of the protective shell, and the plurality of mesh holes are evenly distributed in a ring shape about the vertical center line of the protective shell.

[0011] Preferably, the outer dimension of the plug-in part matches the inner dimension of the protective pipe. The plug-in part and the protective pipe are coaxially arranged. The central axis of the spring coincides with the central axis of the plug-in part.

[0012] Preferably, a slot is opened at the bottom end of the plug-in part. A plug is arranged at the top of the pin. The plug and the pin form an integral structure. The outer dimension of the plug matches the inner dimension of the slot.

[0013] Preferably, a groove is opened at the bottom of the installation piece, and a plurality of adhesive tapes are fixedly connected inside the groove. The plurality of adhesive tapes are evenly distributed in a ring shape about the vertical center line of the installation piece. The bottom surface of the adhesive tape is flush with the bottom surface of the installation piece.

[0014] Beneficial effects

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] In the utility model, the organic solution in the liquid storage capsule expands when heated, which can support the protective shell. In combination with the use of the hollow side plate, the plug-in part and the pin are separated, so as to realize the over-temperature protection of the TVS diode. The setting of the round groove can protect the liquid storage capsule. After the liquid storage capsule expands when heated, the bellows structure on the outer side of the liquid storage capsule is used to support the protective shell, which can facilitate the rapid heat dissipation of the liquid storage capsule. At the same time, the liquid storage capsule is located outside the protective shell, and when the liquid storage capsule leaks, it will not damage the internal devices of the protective shell, improving the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall three-dimensional structure schematic diagram of the utility model;

[0018] Figure 2 is the bottom three-dimensional structure schematic diagram of the utility model;

[0019] Figure 3 is the overall front view structure schematic diagram of the utility model;

[0020] Figure 4 is the three-dimensional structure schematic diagram of the liquid storage capsule of the utility model;

[0021] Figure 5 is the structure schematic diagram of the plug and the slot of the utility model;

[0022] Figure 6 is the partial three-dimensional structure schematic diagram of the utility model.

[0023] The corresponding relationship between the reference numerals and the component names in the drawings is as follows:

[0024] 1. Protective shell; 2. Hollow side plate; 3. Round groove; 4. Liquid storage capsule; 5. Mounting plate; 6. Plug-in part; 7. Protective tube; 8. Pin; 9. Spring; 10. Heat dissipation groove; 11. Mesh hole; 12. Slot; 13. Plug; 14. Adhesive tape. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to make the above objects, features and advantages of the utility model more obvious and understandable, the following detailed description of the specific embodiments of the utility model will be given in conjunction with the drawings of the specification.

[0026] In the following description, many specific details are set forth in order to fully understand the utility model. However, the utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed below.

[0027] Secondly, the "one embodiment" or "embodiment" referred to herein means a specific feature, structure, or characteristic that may be included in at least one implementation manner of the present utility model. The appearances of "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they separate or alternative embodiments that are mutually exclusive with other embodiments. The present utility model provides the following embodiments.

[0028] Please refer to Figure 1-6 , an embodiment provided by the present utility model: A TVS diode with an over-temperature protection function, including a protective shell 1. Both sides of the protective shell 1 are fixedly connected with hollow side plates 2. A circular groove 3 is opened at the bottom of the protective shell 1. The vertical center line of the protective shell 1 coincides with the central axis of the circular groove 3. The hollow side plates 2 communicate with the inside of the protective shell 1, and the hollow side plates 2 are symmetric about the vertical center line of the protective shell 1. A liquid storage capsule 4 for storing organic solution is fixedly connected inside the circular groove 3. The outer side of the liquid storage capsule 4 is of a corrugated pipe structure. The bottom of the liquid storage capsule 4 is fixedly connected with a mounting piece 5. The bottom end of the hollow side plate 2 is fixedly connected with a plug-in member 6. The outer dimension of the plug-in member 6 matches the inner dimension of the protective tube 7. The plug-in member 6 and the protective tube 7 are coaxially arranged. The central axis of the spring 9 coincides with the central axis of the plug-in member 6. The bottom end of the protective tube 7 is fixedly connected with a pin 8. When the organic solution in the liquid storage capsule 4 expands due to heat, the protective shell 1 can be lifted. In cooperation with the use of the hollow side plates 2, the plug-in member 6 and the pin 8 are separated, realizing the over-temperature protection function for the TVS diode. The setting of the circular groove 3 can protect the liquid storage capsule 4. After the liquid storage capsule 4 expands due to heat, the protective shell 1 is lifted by using the corrugated pipe structure on the outer side of the liquid storage capsule 4, which is convenient for the liquid storage capsule 4 to dissipate heat quickly. At the same time, the liquid storage capsule 4 is located outside the protective shell 1, and even if the liquid storage capsule 4 leaks, it will not damage the internal devices of the protective shell 1, improving the safety of the device. A slot 12 is opened at the bottom end of the plug-in member 6. A plug 13 is arranged at the top of the pin 8. The plug 13 and the pin 8 form an integral structure. The outer dimension of the plug 13 matches the inner dimension of the slot 12. Protective tubes 7 corresponding to the positions of the plug-in members 6 are fixedly connected to the bottoms of both ends of the mounting piece 5. The inner diameter dimension of the protective tube 7 matches the outer diameter dimension of the pin 8. The protective shell 1 can protect the semiconductor devices inside the TVS diode. By using the cooperation of the plug 13 and the slot 12, the plug-in member 6 and the pin 8 can be connected. Through the pin 8, this TVS diode can be welded to an external circuit. The setting of the protective tube 7 can protect the connection part of the plug 13 and the slot 12.

[0029] In this embodiment, a groove is provided at the bottom of the mounting sheet 5, and a plurality of adhesives 14 are fixedly connected inside the groove. The plurality of adhesives 14 are evenly distributed in a ring shape about the vertical center line of the mounting sheet 5, and the bottom surface of the adhesive 14 is flush with the bottom surface of the mounting sheet 5. The setting of the adhesive 14 can enhance the stability of the mounting sheet 5 and the external circuit board.

[0030] In this embodiment, a spring 9 is provided between the mounting plate 5 and the hollow side plate 2, and the two ends of the spring 9 are fixedly connected to the mounting plate 5 and the hollow side plate 2 respectively. After the liquid storage capsule 4 is cooled, the elastic force of the spring 9 can be used to connect the connector 6 and the pin 8 to achieve circuit connection.

[0031] In this embodiment, a plurality of heat dissipation grooves 10 are provided on the outer side of the protective shell 1, and the plurality of heat dissipation grooves 10 are evenly distributed in a ring shape about the vertical center line of the protective shell 1. A plurality of mesh holes 11 are provided on the top of the protective shell 1, and the plurality of mesh holes 11 are evenly distributed in a ring shape about the vertical center line of the protective shell 1. The mesh holes 11 are used in coordination to facilitate heat dissipation inside the protective shell 1 of the TVS diode. The provision of the heat dissipation grooves 10 can increase the contact area between the protective shell 1 and the outside air, thereby further improving the heat dissipation performance of the TVS diode.

[0032] Working principle: When using this device, firstly, the protective shell 1 can protect the semiconductor device inside the TVS diode. By using the plug 13 and the slot 12 in combination, the connector 6 can be connected to the pin 8. The TVS diode can be welded in the external circuit through the pin 8. The setting of the protective tube 7 can protect the connection between the plug 13 and the slot 12. The setting of the adhesive 14 can enhance the stability of the installation of the mounting plate 5 and the external circuit board. The use of the mesh 11 can facilitate the heat dissipation inside the protective shell 1 of the TVS diode. The setting of the heat dissipation groove 10 can increase the contact area between the protective shell 1 and the external air, further improving the heat dissipation performance of the TVS diode. When the TVS When the temperature of the diode is too high, the organic solution in the liquid storage capsule 4 expands due to heat, so that the protective shell 1 can be propped up. In conjunction with the use of the hollow side plate 2, the connector 6 is separated from the pin 8, thereby realizing over-temperature protection for the TVS diode. The setting of the circular groove 3 can protect the liquid storage capsule 4. After the liquid storage capsule 4 expands due to heat, the protective shell 1 is propped up by the bellows structure on the outside of the liquid storage capsule 4, which can facilitate rapid heat dissipation of the liquid storage capsule 4. At the same time, the liquid storage capsule 4 is located on the outside of the protective shell 1. When the liquid storage capsule 4 leaks, it will not cause damage to the internal components of the protective shell 1, thereby improving the safety of the device. After the liquid storage capsule 4 cools down, the elastic force of the spring 9 can be used to connect the connector 6 and the pin 8 to realize circuit connection.

[0033] The above content further elaborates on the present utility model in combination with specific embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model pertains, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope determined by the claims submitted for the present utility model.

Claims

1. A TVS diode with an over-temperature protection function, comprising a protective shell (1), wherein both sides of the protective shell (1) are fixedly connected with hollow side plates (2), characterized in that: The bottom of the protective shell (1) is provided with a circular groove (3), the inside of the circular groove (3) is fixedly connected with a liquid storage capsule (4) for storing an organic solution, the outer side of the liquid storage capsule (4) is a corrugated tube structure, the bottom of the liquid storage capsule (4) is fixedly connected with a mounting plate (5), the bottom end of the hollow side plate (2) is fixedly connected with a plug-in connector (6), the bottoms of both ends of the mounting plate (5) are fixedly connected with protective tubes (7) corresponding to the position of the plug-in connector (6), the bottom end of the protective tube (7) is fixedly connected with a pin (8), the inner diameter of the protective tube (7) is consistent with the outer diameter of the pin (8), a spring (9) is provided between the mounting plate (5) and the hollow side plate (2), and the two ends of the spring (9) are respectively fixedly connected to the mounting plate (5) and the hollow side plate (2).

2. The TVS diode with over-temperature protection function according to claim 1, characterized in that: The vertical center line of the protective shell (1) coincides with the center axis of the circular groove (3); the hollow side plate (2) is connected to the interior of the protective shell (1), and the hollow side plate (2) is symmetrical about the vertical center line of the protective shell (1).

3. The TVS diode with over-temperature protection function according to claim 2, characterized in that: A plurality of heat dissipation grooves (10) are provided on the outer side of the protective shell (1), and the plurality of heat dissipation grooves (10) are evenly distributed in a ring shape with respect to the vertical center line of the protective shell (1).

4. The TVS diode with over-temperature protection function according to claim 3, characterized in that: The top of the protective shell (1) is provided with a plurality of mesh holes (11), and the plurality of mesh holes (11) are evenly distributed in a ring shape with respect to the vertical center line of the protective shell (1).

5. The TVS diode with over-temperature protection function according to claim 1, characterized in that: The outer dimension of the connector (6) matches the inner dimension of the protective tube (7); the connector (6) and the protective tube (7) are coaxially arranged; and the central axis of the spring (9) coincides with the central axis of the connector (6).

6. The TVS diode with over-temperature protection function according to claim 5, characterized in that: A slot (12) is provided at the bottom end of the connector (6), a plug (13) is provided at the top of the pin (8), the plug (13) and the pin (8) form an integrated structure, and the outer dimension of the plug (13) matches the inner dimension of the slot (12).

7. The TVS diode with over-temperature protection function according to any one of claims 1 to 6, characterized in that: A groove is provided at the bottom of the mounting plate (5), and a plurality of adhesive tapes (14) are fixedly connected inside the groove. The plurality of adhesive tapes (14) are evenly distributed in a ring shape about the vertical center line of the mounting plate (5), and the bottom surface of the adhesive tape (14) is flush with the bottom surface of the mounting plate (5).

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