CN211654755U - Reducing temperature fuse - Google Patents
Reducing temperature fuse Download PDFInfo
- Publication number
- CN211654755U CN211654755U CN202020709192.4U CN202020709192U CN211654755U CN 211654755 U CN211654755 U CN 211654755U CN 202020709192 U CN202020709192 U CN 202020709192U CN 211654755 U CN211654755 U CN 211654755U
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- China
- Prior art keywords
- pin
- section
- fusible alloy
- shell
- alloy silk
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- Expired - Fee Related
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Abstract
The utility model provides a reducing temperature fuse, includes the pin, seals resin, shell, fluxing fusing agent, fusible alloy silk, the both ends welded connection of pin and fusible gold silk, fusible alloy silk and part pin by sealing resin package in shell insulation space, and at the inside airtight space intussuseption of shell with the encapsulation of sealing resin and fill the fusing agent of helping, fusible alloy silk, including pin section, reducing section and interlude, the pin section be located the welding end of pin, the interlude, its diameter is less than the diameter of pin section, the interlude is connected through the reducing section of shrinking gradually to the pin section. The utility model discloses, fusible alloy silk is under the breakpoint temperature, and fusible alloy silk from the little interlude disconnection of diameter ratio to through the reducing section, fluxing fusing agent contracts the pin section with fusible alloy silk from the interlude breakpoint department, and the fusible alloy silk gathering after the shrink has avoided the temperature fuse to put through the occurence of failure once more on the pin, has improved the safe in utilization of electrical apparatus.
Description
Technical Field
The utility model relates to a special resistance product field especially relates to a temperature fuse among the electronic circuit.
Background
Temperature fuses are non-resettable devices that operate at one time, and are widely used for thermal protection of equipment to prevent one or more parts from reaching dangerous temperatures under fault conditions. The existing temperature fuse mainly takes an alloy type temperature fuse as a main part, consists of fusible alloy with a low melting point and a fluxing fusing agent, and is packaged in a plastic or ceramic shell.
In the temperature fuse in the prior art, the fusible alloy wire is melted and broken, a specially prepared fluxing fusing agent is needed to be broken under the chelation action, the fusible alloy wire of the temperature fuse in the prior art is in a section of a fine cylindrical shape, the chelation action of the fluxing fusing agent on the fusible alloy wire is uniform in all directions, and a resultant force for breaking the fusible alloy wire from two sides is difficult to form in the chelation action process of the fluxing fusing agent, so that the existing temperature fuse has the defects of unobvious effect and slow reaction on the breaking action of the fluxing fusing agent on the fusible alloy wire, namely, the temperature fuse has insensitive reaction in external performance, the existing temperature fuse has high randomness in breaking point temperature, the fusible alloy wire is likely to be broken from a pin, even after the fusible alloy wire is broken, the fusible alloy wire is not completely shrunk together, and the fusible alloy wire is connected again under the action of external force, the purpose of circuit breaking is not achieved. Therefore, the existing temperature fuse is not suitable for being applied to a circuit with higher requirement on safety performance.
Disclosure of Invention
The utility model discloses a following scheme realizes: the utility model provides a reducing temperature fuse, includes the pin, seals resin, shell, fluxing fusing agent, fusible alloy silk, the both ends welded connection of pin and fusible gold silk, fusible alloy silk and part pin are by sealing the resin encapsulation in shell insulation space, and pack in the inside airtight space of shell and sealing resin encapsulation and help fusing agent, its characterized in that: the fusible alloy wire comprises a pin section, a reducing section and a middle section, wherein the pin section is located at the welding end of the pin, the diameter of the middle section is smaller than that of the pin section, and the pin section is connected with the middle section through the reducing section which gradually shrinks.
Further, the shell is in a square shell type or a round ceramic shape.
Further, the diameter of the middle section is larger than that of the pin.
Further, the length of the variable diameter section is at least half of the total length of the fusible alloy wire.
The utility model discloses, the diameter of interlude fusible alloy silk will be less than between pin section and the reducing section, and the temperature fuse is at the in-process of circular telegram, and the generated heat is bigger, consequently, the disconnection of temperature fuse from the interlude under the breakpoint temperature to can reach the purpose of the thorough broken circuit of temperature fuse.
The utility model discloses, fusible alloy silk reducing section makes the circuit under the breakpoint temperature, and fluxing fusing agent forms the synergetics help fusible alloy silk shrink in the pin section to the chelation of the fusible gold silk more easily. The process of shrinkage of the fusible alloy wire, that is, the fusible alloy wire is gathered from the small part to the large part, obviously, at the breakpoint temperature, the fusible alloy wire in the middle is the least, the fusible alloy wire in the pin section is the most, the shrinkage direction is from the break point of the middle section to the pin sections on both sides, and the arrangement of the diameter-variable section can provide a shrinkage direction for the shrinkage of the fusible alloy wire and help the fusible alloy wire in the middle section to shrink to the pin sections. Therefore, the middle section can enable the temperature fuse to shrink from the middle section to the pin section quickly, the shrunk fusible alloy wire is gathered on the pin, the temperature fuse is prevented from being connected again, and the practical safety of the electric appliance is improved.
Drawings
FIG. 1 is a perspective view of a square-shell thermal fuse.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a schematic sectional view taken along the line a-a in fig. 2.
FIG. 4 is a perspective view of a two-ceramic case thermal fuse.
Fig. 5 is a top view of fig. 4.
Fig. 6 is a schematic cross-sectional view taken along the direction B-B in fig. 5.
Wherein: 1-pin, 2-sealing resin, 3-shell, 4-fusing assistant, 5-fusible alloy wire, 5 a-pin section, 5 b-diameter-variable section and 5 c-middle section.
Detailed Description
The following provides a brief description of embodiments of the present invention with reference to the accompanying drawings.
The utility model relates to a temperature fuse of reducing, can be the temperature fuse of plastics square shell type, also can be the cylindric temperature fuse of ceramic shell, refer to fig. 1, fig. 2, fig. 3, concrete implementation is on square shell type temperature fuse, including two pins (1), the perpendicular welded connection in the head of pin (1) in both ends of fusible alloy silk (5), fusible alloy silk (5) and two welded pin (1) disect insertion are filled in shell (3) of the square plastics of helping fusing agent (4), and fusible alloy silk (5) and partial pin (1) are encapsulated in shell (3) insulation space by sealing resin (2). Referring to fig. 4, 5 and 6, the fuse is specifically implemented on a ceramic case temperature fuse and comprises two pins (1), two ends of a fusible alloy wire (5) are horizontally welded and connected to the pins (1), a layer of fuse promoter (4) is coated on the outer surface of the fusible alloy wire (5), the fusible alloy wire (5) with the fuse promoter (4) and the two welded pins (1) are directly inserted into a case (3) of the ceramic case, and then two ends of the case (3) are encapsulated by sealing resin (2).
The utility model discloses, fusible alloy silk (5), including pin section (5 a), reducing section (5 b) and interlude (5 c), the diameter of pin section (5 a) will be greater than interlude (5 c), and reducing section (5 b) is the diameter according to pin section (5 a) and interlude (5 c) between the diameter continuous transition, and interlude (5 c) length accounts for more than half of the total length of fusible alloy silk (5).
The utility model discloses, fusible alloy silk (5) are under the breakpoint temperature, fusible alloy silk (5) break off from the less interlude of diameter (5 c), and through reducing section (5 b), help fusing agent (4) with fusible alloy silk (5) from interlude (5 c) breakpoint department shrink to pin section (5 a), fusible alloy silk (5) gathering after the shrink is on pin (1), avoided the temperature fuse to put through the occurence of failure once more, improved the safe in utilization of electrical apparatus.
The above embodiments only express the embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (4)
1. The utility model provides a reducing temperature fuse, includes the pin, seals resin, shell, fluxing fusing agent, fusible alloy silk, the both ends welded connection of pin and fusible gold silk, fusible alloy silk and part pin are by sealing the resin encapsulation in shell insulation space, and pack in the inside airtight space of shell and sealing resin encapsulation and help fusing agent, its characterized in that: the fusible alloy wire comprises a pin section, a reducing section and a middle section, wherein the pin section is located at the welding end of the pin, the diameter of the middle section is smaller than that of the pin section, and the pin section is connected with the middle section through the reducing section which gradually shrinks.
2. The variable diameter thermal fuse according to claim 1, wherein: the shell is in a square shell type or a round ceramic shape.
3. The variable diameter thermal fuse according to claim 1, wherein: the diameter of the middle section is larger than that of the pin.
4. The variable diameter thermal fuse according to claim 1, wherein: the length of the variable diameter section is at least half of the total length of the fusible alloy wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020709192.4U CN211654755U (en) | 2020-05-01 | 2020-05-01 | Reducing temperature fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020709192.4U CN211654755U (en) | 2020-05-01 | 2020-05-01 | Reducing temperature fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211654755U true CN211654755U (en) | 2020-10-09 |
Family
ID=72689862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020709192.4U Expired - Fee Related CN211654755U (en) | 2020-05-01 | 2020-05-01 | Reducing temperature fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211654755U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113380591A (en) * | 2021-05-11 | 2021-09-10 | 国网浙江嘉善县供电有限公司 | Anti-external-damage line-connection ceramic tube |
-
2020
- 2020-05-01 CN CN202020709192.4U patent/CN211654755U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113380591A (en) * | 2021-05-11 | 2021-09-10 | 国网浙江嘉善县供电有限公司 | Anti-external-damage line-connection ceramic tube |
| CN113380591B (en) * | 2021-05-11 | 2022-11-04 | 国网浙江嘉善县供电有限公司 | Anti-external-damage line-connection ceramic tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201009 Termination date: 20210501 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |