CN210897183U - Surge-resistant thermal fuse link with high breaking capacity - Google Patents
Surge-resistant thermal fuse link with high breaking capacity Download PDFInfo
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- CN210897183U CN210897183U CN201922254288.6U CN201922254288U CN210897183U CN 210897183 U CN210897183 U CN 210897183U CN 201922254288 U CN201922254288 U CN 201922254288U CN 210897183 U CN210897183 U CN 210897183U
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Abstract
The utility model belongs to the technical field of thermal links, in particular to a surge-resistant thermal link with high breaking capacity, which comprises a metal pin I, an insulator, a star-shaped reed, a copper sheet I, a copper sheet II, an organic matter temperature sensing body, a copper shell and a metal pin II; an opening is formed in one end of the copper shell, a through hole is formed in the other end of the copper shell, an insulator, a thin spring, a star-shaped reed, a copper sheet I, a thick spring, a copper sheet II and an organic matter temperature sensing body are sequentially arranged in the copper shell from left to right, the insulator is arranged in the opening in one end of the copper shell, and one end of a metal pin I penetrates through the insulator and is connected with one side of the star-shaped reed. The end part of the pier head of the metal pin I is provided with an electric corrosion resistant conductive alloy layer, or a silver tin oxide indium conductive column is arranged on a star-shaped spring; the temperature fuse has larger through-current capacity and working current breaking capacity; the star-shaped reed and the metal pin contacted with the star-shaped reed are prevented from being adhered together; has strong arc erosion resistance and surge current resistance.
Description
Technical Field
The utility model belongs to the technical field of the thermal link, concretely relates to high breaking capacity's resistant surge type thermal link.
Background
Thermal fuses, known as Thermal fuses or Thermal-links in english, are commonly referred to as Thermal fuses. The thermal fuse is a device which can act once and is not resettable, is widely applied to the overheating protection of products such as lighting appliances, household appliances, automobiles, information products, medical equipment, electronic component protection, motors, transformers and the like, and prevents one or more parts from reaching dangerous temperature under fault conditions.
The thermal fuse is generally installed on a heating device of the electric device, and can sense an over-temperature generated during an abnormal operation of the electric device, thereby cutting off a circuit to prevent a fire. The organic matter thermal fuse link is widely applied to products such as microwave ovens, air fryer, electric rice cooker, electric irons and electric hair dryers, when the temperature of electric equipment rises to a specific temperature due to various abnormalities in the products, the organic matter thermal fuse link realizes over-temperature fusing through the self structure, cuts off a current loop, and prevents the electric equipment from continuing to rise temperature, damage and even fire hazard.
When the existing organic matter type thermal link is impacted by a large surge current, the metal pin I and the star-shaped reed are easily welded together directly due to the corrosion effect of the current, when the organic matter thermal link senses the environment temperature, the organic matter pressing block is fused, the thick spring is released, the thin spring cannot push away the contact of the metal pin I and the star-shaped reed, the thermal link cannot work normally, and the protection function of the thermal link fails. The surge-resistant thermal fuse link with high breaking capacity is designed for solving the problem, and the double-layer or multi-layer electric-corrosion-resistant star-shaped reed and the metal pin I with the pier head provided with the electric-corrosion-resistant alloy layer have strong capacity of resisting surge current and overcurrent impact; under the action of surge current and abnormal overcurrent, the surfaces of the high-voltage and low-voltage switch are not easily corroded by current, and better current-on and current-off capabilities can be maintained. When the temperature of the electric equipment is abnormally increased, after the organic matter pressing block of the high-breaking-capacity surge-resistant thermal link is fused and the thick spring is released, the thin spring can smoothly push away the contact between the metal pin I and the star-shaped reed, the thermal link can reliably and normally work, the current of a circuit where the high-breaking-capacity surge-resistant thermal link is located is automatically interrupted, the electric equipment is protected, and the safety of user equipment is improved.
SUMMERY OF THE UTILITY MODEL
To solve the problems set forth in the background art described above. The utility model provides a surge-resistant thermal link with high breaking capacity, which avoids the abnormity that the organic matter type thermal link can not be normally broken because the star-shaped reed of the conventional organic matter type thermal link is adhered with the metal pin contacted with the star-shaped reed when the circuit where the organic matter type thermal link is positioned has abnormal large surge current impact or abnormal large voltage needs high breaking capacity; the high-voltage surge-resistant thermal fuse link has the advantages of being high in arc erosion resistance and surge current resistance, capable of reliably breaking under high current and high voltage, capable of improving reliability of a surge-resistant thermal fuse link with high breaking capacity and capable of improving safety of protected electric equipment.
In order to achieve the above object, the utility model provides a following technical scheme: a surge-resistant thermal fuse link with high breaking capacity comprises a metal pin I, an insulator, a fine spring, a star-shaped reed, a copper sheet I, a coarse spring, a copper sheet II, an organic temperature-sensing body, a copper shell and a metal pin II; an opening part is arranged at one end of the copper shell, a through hole is arranged at the other end of the copper shell, an insulator, a thin spring, a star-shaped reed, a copper sheet I, a thick spring, a copper sheet II and an organic matter temperature sensing body are sequentially arranged in the copper shell from left to right, the insulator is arranged in the opening part at one end of the copper shell, one end of a metal pin I penetrates through the insulator and is connected with one side of the star-shaped reed, the thin spring is arranged between the insulator and the star-shaped reed, the copper sheet I is connected and arranged at the other side of the star-shaped reed, an electric erosion resistant conductive alloy layer is arranged at the pier head end part of the metal pin I, a layer of electric erosion resistant conductive film is arranged on the surface of the star-shaped reed, the temperature sensor is connected with one end of an organic temperature sensing body, the other end of the organic temperature sensing body is connected with a copper sheet II, and a coarse spring is arranged between the copper sheet I and the copper sheet II; an opening part at one end of the copper shell is sealed with epoxy resin.
Preferably, the electric corrosion resistant conductive alloy layer is made of AgSnO with strong electric corrosion resistance2The AgC, AgW, AgNi and AgZnO materials are prepared by cold pressing and hot pressing processes, and can also be prepared by other processes which are convenient for the effective combination of the electric corrosion resistant alloy layer and the metal pins.
Preferably, the thickness of the electric corrosion resistant conductive alloy layer is 0.1mm-5mm, and the thickness is adjusted according to the application requirement and the electric corrosion resistant requirement of a finished product.
Preferably, the star-shaped reed is formed by compounding two or more layers of metal with good conductivity;
the bottom layer of the star-shaped reed is composed of a layer of thin copper with good conductivity, and one or more layers of metal layers made of silver-nickel alloy, silver-tungsten alloy and silver-tin-indium oxide materials with good conductivity, electric corrosion resistance and strong surge resistance are arranged on the bottom layer.
Preferably, the thickness of the star-shaped reed is 0.05mm-2 mm.
Preferably, the star-shaped reed is provided with a conductive column connected with the end part of the pier head of the metal pin I;
the conductive column is directly processed by silver tin indium oxide; or the copper-aluminum metal and the nonmetal with excellent electrical property are taken as the basal body, and the upper surface and the lower surface of the basal body are respectively covered with a silver tin indium oxide layer.
Preferably, the conductive column is composed of an upper layer structure, a lower layer structure, or an upper layer structure, a middle layer structure and a lower layer structure.
Preferably, the thickness of the silver indium tin oxide coating covering the surface of the substrate is 0.01mm-2 mm.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model combines a temperature sensing structure by a pin I, an insulator, a thin spring, a star-shaped reed, a copper sheet I, a thick spring, a copper sheet II, an organic temperature sensing body, a copper shell and a metal pin II; before a surge-resistant thermal link with high breaking capacity acts, the thick spring is in a compressed state; when the high-breaking-capacity surge-resistant thermal fuse-link senses the change of the environmental temperature and reaches the designed action temperature, the temperature-sensing thermal fuse-link starts to melt, the thin spring pushes the star-shaped reed, the star-shaped reed is electrically disconnected with the metal pin I, and the high-breaking-capacity surge-resistant thermal fuse-link acts to realize the protection function of the circuit in which the high-breaking-capacity surge-resistant thermal fuse-link is located.
The end part of the pier head of the metal pin I is provided with an electric corrosion resistant conductive alloy layer, or a silver tin oxide indium conductive column is arranged on a star-shaped spring; the temperature fuse has larger through-current capacity and working current breaking capacity; the problem that when a circuit where the organic matter type thermal link is located has abnormal large surge current impact or abnormal large voltage needs high breaking capacity, star-shaped reeds of the conventional organic matter type thermal link are adhered to metal pins contacted with the star-shaped reeds, the organic matter type thermal link is subjected to environmental temperature rise, and after an organic matter pressing block is fused, the organic matter type thermal link cannot be normally broken is avoided. The high-breaking-capacity surge-resistant thermal link has strong arc erosion resistance and surge current resistance, can be reliably broken under high current and high voltage, improves the reliability of the high-breaking-capacity surge-resistant thermal link, and improves the safety of protected electric equipment;
the temperature fuse with the silver tin indium oxide conductive column arranged on the star-shaped reed has larger through-current capacity and working current breaking capacity. The ability to withstand abnormal currents and voltages is significantly higher than a thermal fuse without a silver indium tin oxide conductive component mounted.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a first embodiment of a surge-resistant thermal link with high breaking capacity according to the present invention;
fig. 2 is a schematic structural diagram of a metal pin I in a first embodiment of a surge-resistant thermal fuse of the present invention with high breaking capacity;
fig. 3 is a schematic structural diagram of a second embodiment of a surge-resistant thermal link with high breaking capacity according to the present invention;
fig. 4 is a schematic structural diagram of a conductive column in a second embodiment of a surge-resistant thermal link with high breaking capacity according to the present invention;
fig. 5 is a schematic structural diagram of another conductive column in the second embodiment of the surge-resistant thermal fuse link with high breaking capacity of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
Referring to fig. 1-2, the present invention provides the following technical solutions: a surge-resistant thermal fuse link with high breaking capacity comprises a metal pin I1, an insulator 2, a fine spring 3, a star-shaped reed 4, a copper sheet I5, a coarse spring 6, a copper sheet II 7, an organic matter temperature sensing body 8, a copper shell 9 and a metal pin II 10; an opening part is arranged at one end of a copper shell 9, a through hole is arranged at the other end, an insulator 2, a thin spring 3, a star-shaped reed 4, a copper sheet I5, a thick spring 6, a copper sheet II 7 and an organic matter temperature sensing body 8 are sequentially arranged in the copper shell 9 from left to right, the insulator 2 is arranged in the opening part at one end of the copper shell 9, one end of a metal pin I1 penetrates through the insulator 2 and is connected with one side of the star-shaped reed 4, the thin spring 3 is arranged between the insulator 2 and the star-shaped reed 4, the copper sheet I5 is connected and arranged at the other side of the star-shaped reed 4, an electric erosion resistant conductive alloy layer 12 is arranged at the pier head end part of the metal pin I1, a layer of an electric erosion resistant conductive film is arranged on the surface of the star-shaped reed 4, the organic matter temperature sensing body 8 is arranged in the other end of the copper shell, the other end of the organic temperature sensing body 8 is connected with a copper sheet II 7, and a coarse spring 6 is arranged between the copper sheet I5 and the copper sheet II 7; an opening at one end of the copper shell 9 is sealed with epoxy resin 11.
Specifically, the electric corrosion resistant conductive alloy layer 12 is made of AgSnO2, AgC, AgW, AgNi, and AgZnO materials with strong electric corrosion resistance through cold pressing and hot pressing processes, or can be made through other processes which facilitate effective combination of the electric corrosion resistant alloy layer and the metal pins.
Specifically, the thickness of the electric corrosion resistant conductive alloy layer 12 is 0.1mm-5mm, and the thickness thereof is adjusted according to the application requirements and the electric corrosion resistant requirements of the finished product.
Specifically, the star-shaped reed 4 is formed by compounding two or more layers of metal with good conductivity;
the bottom layer of the star-shaped reed 4 is composed of a layer of thin copper with good conductivity, and one or more layers of metal layers made of silver-nickel alloy, silver-tungsten alloy and silver-tin-indium oxide materials with good conductivity, electric corrosion resistance and strong surge resistance are arranged on the bottom layer.
Specifically, the thickness of the star-shaped reed 4 is 0.05mm-2 mm.
Example 2:
referring to fig. 3 to 5, the technical features different from embodiment 1 are as follows:
a conductive column 13 connected with the end part of the pier head of the metal pin I1 is arranged on the star-shaped reed 4;
the conductive column 13 is directly processed from silver indium tin oxide; or the copper-aluminum metal and the nonmetal with excellent electrical property are taken as the basal body, and the upper surface and the lower surface of the basal body are respectively covered with a silver tin indium oxide layer; therefore, the use amount of noble metals such as silver, tin, indium, silver and the like is greatly saved, the cost is reduced, and the product value is improved. The conductive part is reasonable in structure, excellent in electrical performance in installation, and accordingly current carrying capacity of the temperature fuse using the conductive part is greatly improved, and application range and application field of the temperature fuse are expanded.
Specifically, the conductive column 13 is composed of an upper layer structure, a lower layer structure, or an upper layer structure, a middle layer structure, and a lower layer structure.
Specifically, the thickness of the silver indium tin oxide coating covering the surface of the substrate is 0.01mm-2 mm.
The utility model discloses a theory of operation and use flow:
when abnormal surge current or abnormal high voltage occurs in a circuit where the surge-resistant thermal fuse-link with high breaking capacity is located, and the surge current or the abnormal high voltage flows through the metal pin I1 and the star reed 4, large electric arcs can be caused by the surge current or the abnormal high voltage, the corrosion-resistant alloy layers of the metal pin I1 and the star reed 4 can effectively resist the corrosion of the surge current, and the failure of the breaking function of the surge-resistant thermal fuse-link with high breaking capacity is prevented.
The utility model combines a temperature sensing structure by a metal pin I1, an insulator 2, a thin spring 3, a star-shaped reed 4, a copper sheet I5, a thick spring 6, a copper sheet II 7, an organic temperature sensing body 8, a copper shell 9 and a metal pin II 10; before a surge-resistant thermal link with high breaking capacity acts, the thick spring 6 is in a compressed state; when the high-breaking-capacity surge-resistant thermal link body senses the change of the environmental temperature and reaches the designed action temperature, the thermal link body of the organic matter temperature sensing body 8 starts to melt, the thin spring 3 pushes the star-shaped reed 4, the star-shaped reed 4 is electrically disconnected with the metal pin I1, and the high-breaking-capacity surge-resistant thermal link body acts to realize the protection function of the circuit in which the high-breaking-capacity surge-resistant thermal link body is arranged.
The end part of the pier head of the metal pin I1 of the utility model is provided with an electric corrosion resistant conductive alloy layer, or a silver tin oxide indium conductive column 13 is arranged on the star-shaped reed 4; the temperature fuse has larger through-current capacity and working current breaking capacity; the abnormal situation that when the circuit where the organic matter temperature sensing body 8 thermal fuse link is located has abnormal large surge current impact or abnormal large voltage needs high breaking capacity, the star-shaped reed 4 of the conventional organic matter type thermal fuse link is adhered with the metal pin contacted with the star-shaped reed, the temperature of the sensing environment of the organic matter temperature sensing body 8 thermal fuse link rises, and the organic matter temperature sensing body 8 thermal fuse link cannot be normally broken after the organic matter pressing block is fused is avoided. The high-breaking-capacity surge-resistant thermal link has strong arc erosion resistance and surge current resistance, can be reliably broken under high current and high voltage, improves the reliability of the high-breaking-capacity surge-resistant thermal link, and improves the safety of protected electric equipment;
the thermal fuse with the silver tin indium oxide conductive column 13 mounted on the star-shaped reed 4 has high through-current capacity and working current breaking capacity. The ability to withstand abnormal currents and voltages is significantly higher than the temperature without the silver indium tin oxide conducting component installed.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a high breaking capacity's resistant surge type thermal link which characterized in that: the temperature-sensing device comprises a metal pin I (1), an insulator (2), a thin spring (3), a star-shaped reed (4), a copper sheet I (5), a thick spring (6), a copper sheet II (7), an organic temperature-sensing body (8), a copper shell (9) and a metal pin II (10); an opening part is arranged at one end of a copper shell (9), a through hole is arranged at the other end of the copper shell, an insulator (2), a thin spring (3), a star-shaped reed (4), a copper sheet I (5), a thick spring (6), a copper sheet II (7) and an organic matter temperature sensing body (8) are sequentially arranged in the copper shell (9) from left to right, the insulator (2) is arranged in the opening part at one end of the copper shell (9), one end of a metal pin I (1) penetrates through the insulator (2) and is connected with one side of the star-shaped reed (4), the thin spring (3) is arranged between the insulator (2) and the star-shaped reed (4), the copper sheet I (5) is connected and arranged at the other side of the star-shaped reed (4), an electric erosion resistant conductive alloy layer (12) is arranged at the end part of a pier head of the metal pin I (1), an electric erosion resistant conductive film is arranged on the surface of the star, one end of a metal pin II (10) is fixedly arranged in one end of the copper shell (9) through a through hole and is connected with one end of the organic temperature sensing body (8), the other end of the organic temperature sensing body (8) is connected with a copper sheet II (7), and a coarse spring (6) is arranged between the copper sheet I (5) and the copper sheet II (7); an opening part at one end of the copper shell (9) is sealed and provided with epoxy resin (11).
2. The surge-resistant thermal link with high breaking capacity according to claim 1, wherein: the thickness of the electric corrosion resistant conductive alloy layer (12) is 0.1mm-5mm, and the thickness is adjusted according to the application requirement and the electric corrosion resistant requirement of a finished product.
3. The surge-resistant thermal link with high breaking capacity according to claim 1, wherein: the thickness of the star-shaped reed (4) is 0.05mm-2 mm.
4. The surge-resistant thermal link with high breaking capacity according to claim 1, wherein: and the star-shaped reed (4) is provided with a conductive column (13) connected with the end part of the pier head of the metal pin I (1).
5. The surge-resistant thermal link with high breaking capacity according to claim 4, wherein: the conductive column (13) is composed of an upper layer structure, a lower layer structure or an upper layer structure, a middle layer structure and a lower layer structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922254288.6U CN210897183U (en) | 2019-12-16 | 2019-12-16 | Surge-resistant thermal fuse link with high breaking capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922254288.6U CN210897183U (en) | 2019-12-16 | 2019-12-16 | Surge-resistant thermal fuse link with high breaking capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210897183U true CN210897183U (en) | 2020-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922254288.6U Active CN210897183U (en) | 2019-12-16 | 2019-12-16 | Surge-resistant thermal fuse link with high breaking capacity |
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| Country | Link |
|---|---|
| CN (1) | CN210897183U (en) |
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| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No.6, Hongjian Road, jiaomei Town, Taiwan investment zone, Zhangzhou City, Fujian Province, 363000 Patentee after: Zhangzhou Yabao Electronics Co.,Ltd. Address before: 363007 Hongjian Industrial Zone, Longchi Development Zone, Zhangzhou City, Fujian Province Patentee before: ZHANGZHOU YABAO ELECTRONIC Co.,Ltd. |
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| CP03 | Change of name, title or address |