CN214043585U - Temperature fuse - Google Patents
Temperature fuse Download PDFInfo
- Publication number
- CN214043585U CN214043585U CN202120010934.9U CN202120010934U CN214043585U CN 214043585 U CN214043585 U CN 214043585U CN 202120010934 U CN202120010934 U CN 202120010934U CN 214043585 U CN214043585 U CN 214043585U
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- China
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- fusible alloy
- protective shell
- pins
- connecting areas
- fusing
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Abstract
The utility model relates to a temperature fuse, which comprises a protective shell, fusible alloy and two pins, wherein the fusible alloy is arranged in the protective shell, and one ends of the two pins are encapsulated in the protective shell and are respectively and electrically connected with the fusible alloy; the two pins are provided with connecting areas arranged in the protective shell, the two connecting areas are flaky and are arranged oppositely side by side so as to form a fusing space between the two connecting areas; the fusible alloy is arranged in the fusing space, two ends of the fusible alloy are connected to the two connecting areas, and a fusing assistant agent is filled in the fusing space. The fusible alloy is coated with the fusing assistant agent, when the temperature of the external circuit is higher than the rated temperature of the temperature fuse, the fusible alloy can be quickly disconnected under the promotion of the fusing assistant agent and can be contracted to the connection area of the pins, the disconnection is realized, the problem of molten liquid dispersion is solved, and the protected external circuit is cut off.
Description
Technical Field
The utility model belongs to the technical field of the electron, specific design temperature fuse for circuit protection.
Background
A thermal fuse (thermal fuse) is a non-resettable circuit thermal protection device that incorporates a thermal element (a fusible alloy formed to a specified size, also known as a temperature sensing body) that, when exposed to temperatures in excess of a designed temperature for a sufficient period of time, will open the circuit and thereby protect the circuit.
In practical use, the molten alloy migrates towards the sealing position along the lead under the action of surface tension, so that the fusion has great dispersity, and incomplete fusion and incapability of safely cutting off a circuit can occur in some cases;
on the other hand, the temperature fuse sealing material is usually a high polymer material, and can soften at high temperature, the sealing effect is reduced, and the melted alloy can migrate out of the seal with a certain probability, possibly affecting the normal operation of other components in the electric and electronic products.
Therefore, there is a high necessity for a thermal fuse capable of controlling the dispersion of the melted fusible alloy.
Disclosure of Invention
The utility model aims at providing a temperature fuse to solve current temperature fuse, the problem of the fusible alloy dispersion after melting.
The specific scheme is as follows: a temperature fuse comprises a protective shell, fusible alloy and two pins, wherein the fusible alloy is arranged in the protective shell, and one ends of the two pins are packaged in the protective shell and are respectively and electrically connected with the fusible alloy; the two pins are provided with connecting areas arranged in the protective shell, the two connecting areas are flaky and are arranged oppositely side by side so as to form a fusing space between the two connecting areas; the fusible alloy is arranged in the fusing space, two ends of the fusible alloy are connected to the two connecting areas, and a fusing assistant agent is filled in the fusing space.
The utility model discloses a further technical scheme does: the two pins are both sheet electrode plates, the connecting areas of the two sheet electrodes are respectively provided with an embedding hole, and two ends of the fusible alloy are respectively embedded into the embedding holes.
The utility model discloses a further technical scheme does: the fusible alloy is one, two or more cylindrical and is vertically arranged between the two sheet electrodes.
The utility model discloses a further technical scheme does: one end of the protective shell is provided with an installation opening, the other end of the protective shell is provided with a pin gap, and the two pins respectively extend out of the protective shell through the installation opening and the pin gap; sealing materials are arranged at the installation opening and the pin gap.
The utility model discloses a further technical scheme does: the width of the mounting opening is adapted to the thickness of the two pins after connection; the pin gap width is adapted to correspond to the pin thickness extending out.
The utility model discloses a further technical scheme does: the protective shell is made of ceramic or plastic materials, and the sealing material is epoxy resin; the electrode plate is a rectangular metal plate.
Has the advantages that: the temperature fuse comprises a protective shell, fusible alloy and two pins, wherein the fusible alloy is arranged in the protective shell, and one ends of the two pins are packaged in the protective shell and are respectively and electrically connected with the fusible alloy; the two pins are provided with connecting areas arranged in the protective shell, the two connecting areas are flaky and are arranged oppositely side by side so as to form a fusing space between the two connecting areas; the fusible alloy is arranged in the fusing space, two ends of the fusible alloy are connected to the two connecting areas, and a fusing assistant agent is filled in the fusing space. The fusible alloy is coated with the fusing assistant agent, when the temperature of the external circuit is higher than the rated temperature of the temperature fuse, the fusible alloy is quickly disconnected under the promotion of the fusing assistant agent and shrinks to the connection area of the pin, so that the disconnection is realized, the problem of dispersion of the fused fusible alloy is solved, and the protected external circuit is cut off.
Drawings
FIG. 1 shows a front view of the temperature fuse of the present invention;
FIG. 2 shows a cross-sectional view of FIG. 1;
fig. 3 shows a schematic structural view of the pin connection fusible alloy of fig. 1.
Detailed Description
To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The present invention will now be further described with reference to the accompanying drawings and detailed description.
As shown in fig. 1 to 3, this embodiment provides a temperature fuse.
The temperature fuse comprises a connecting circuit, and a protective shell 1 is sleeved on the connecting circuit. The connecting circuit comprises two cylindrical fusible alloys 4 and two pins made of rectangular metal materials, namely a first pin 2 and a second pin 3.
In this embodiment, the protective casing 1 is a rectangular ceramic casing, and a rectangular installation control is disposed therein to plug the connection circuit into the installation control.
One end of the protective shell 1 is provided with an installation opening, and the other end is provided with a pin gap. The two columnar fusible alloys 4 coated with the fusing assistant agent and the two pins are brazed under the action of the soldering flux to form a Z-shaped whole, and the first pins 2 and the second pins 3 respectively extend out of the protective shell through the mounting openings and the pin gaps; meanwhile, a first sealing material 61 is arranged at the position of the installation opening, and a second sealing material 62 is arranged at the pin gap, wherein in the embodiment, the first sealing material 61 and the second sealing material 62 are epoxy resin insulating blocks, so that the inside is sealed. The protective shell 1 is wrapped by the fusible alloy 4 coated with the fusing assistant agent to realize electrical and thermal interconnection with an external circuit through two pins.
In order to realize convenient installation, the width of the installation opening is matched with the thickness of the first pin 2 and the second pin 3 after connection, meanwhile, the pin gap width is matched with the thickness of the second pin 3, and in the invention, the specific meaning of the size "matching" is the size relation that the part can be allowed to pass through but the matching gap is smaller, or transition matching is realized. This kind of uncovered and gap structure increases the structural strength of temperature fuse and realizes the function of location, and is convenient for seal, has improved sealed effect.
Referring to fig. 2, the first lead 2 and the second lead 3 are both rectangular metal sheets, so as to form the electrode sheet.
The two fusible alloys 4 are arranged in the protective shell 1, and one ends of the first pins 2 connected with the second pins 3 are encapsulated in the protective shell 1 and are respectively and electrically connected with the fusible alloys; the specific electric connection mode is as follows:
two fusible alloys 4 are cylindrical and vertically arranged between the two sheet electrodes; meanwhile, the connecting areas of the two sheet electrodes are respectively provided with an embedding hole, and two ends of the fusible alloy 4 are respectively embedded into the embedding holes, so that the fused fusible alloy is retained by the embedding holes in a molten state to form a contraction point, and the fused fusible alloy is ensured to be adhered to the connecting areas.
Defining two-piece electrodes arranged in the protective shell 1 and provided with connecting areas of embedding holes, wherein the two connecting areas are in a piece shape and are arranged oppositely side by side, so that a fusing space is formed between the two connecting areas, meanwhile, the two fusible alloys 4 are arranged in the fusing space, and the two ends of each fusible alloy are connected to the two connecting areas; and the fusing space is filled with fusing assistant agent 5.
The working principle of the embodiment is as follows: when the temperature of the external circuit is higher than the rated temperature of the temperature fuse, the fusible alloy 4 is rapidly disconnected and shrinks to the side face of the pin under the promotion of the fluxing medium 5, so that the open circuit is realized, and the protected external circuit is cut off.
The thermal fuse of this embodiment has an axial external structure and a small volume, and is composed of a case and two chip electrodes. The tab electrode provides a greater surface area for the fusible alloy of the thermal fuse to contract to the electrode after reaching its fusing temperature.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A temperature fuse comprises a protective shell, fusible alloy and two pins, wherein the fusible alloy is arranged in the protective shell, and one ends of the two pins are packaged in the protective shell and are respectively and electrically connected with the fusible alloy; the method is characterized in that:
the two pins are provided with connecting areas arranged in the protective shell, the two connecting areas are flaky and are arranged oppositely side by side so as to form a fusing space between the two connecting areas;
the fusible alloy is arranged in the fusing space, two ends of the fusible alloy are connected to the two connecting areas, and a fusing assistant agent is filled in the fusing space.
2. The thermal fuse according to claim 1, wherein: the two pins are both sheet electrode plates, the connecting areas of the two sheet electrodes are respectively provided with an embedding hole, and two ends of the fusible alloy are respectively embedded into the embedding holes.
3. The thermal fuse according to claim 2, wherein: the fusible alloy is one, two or more cylindrical and is vertically arranged between the two sheet electrodes.
4. The thermal fuse according to claim 1, wherein: one end of the protective shell is provided with an installation opening, the other end of the protective shell is provided with a pin gap, and the two pins respectively extend out of the protective shell through the installation opening and the pin gap; sealing materials are arranged at the installation opening and the pin gap.
5. The thermal fuse according to claim 4, wherein: the width of the mounting opening is adapted to the thickness of the two pins after connection; the pin gap width is adapted to correspond to the pin thickness extending out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120010934.9U CN214043585U (en) | 2021-01-04 | 2021-01-04 | Temperature fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120010934.9U CN214043585U (en) | 2021-01-04 | 2021-01-04 | Temperature fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214043585U true CN214043585U (en) | 2021-08-24 |
Family
ID=77345883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120010934.9U Active CN214043585U (en) | 2021-01-04 | 2021-01-04 | Temperature fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214043585U (en) |
-
2021
- 2021-01-04 CN CN202120010934.9U patent/CN214043585U/en active Active
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