CN203085467U - Thermal fuse - Google Patents
Thermal fuse Download PDFInfo
- Publication number
- CN203085467U CN203085467U CN2013201294982U CN201320129498U CN203085467U CN 203085467 U CN203085467 U CN 203085467U CN 2013201294982 U CN2013201294982 U CN 2013201294982U CN 201320129498 U CN201320129498 U CN 201320129498U CN 203085467 U CN203085467 U CN 203085467U
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- China
- Prior art keywords
- shell
- fusible alloy
- metal pin
- thermal fuse
- sealing resin
- Prior art date
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Abstract
The utility model discloses a thermal fuse which comprises a metal pin, sealing resin, a shell, a fusing agent and a fusible alloy, wherein the head of the metal pin is in welded connection with two ends of the fusible alloy; the fusible alloy and the partial metal pin are sealed in an insulating space of the shell through the sealing resin; and the fusing agent is filled in an inner closed space formed by packaging the shell and the sealing resin. The thermal fuse is characterized in that the fusible alloy and the metal pin are in an inverted M shape; and the shell has an inwards convex triangular shape at the bottom. Compared with the prior art, the thermal fuse has the advantages that arcs at two ends of the metal pin can be effectively blocked, the arcs are reduced, the sparkle, combustion and other potential safety hazards are avoided, the using safety of the thermal fuse is improved, the melted fusible alloy can be deposited at the bottom of the shell after disconnection, the melted fusible alloy can be effectively prevented from being connected again through the convex triangular shape of the shell, the circuit can be disconnected permanently, and the using safety is improved.
Description
Technical field
The utility model relates to special resistance product scope in the electronic circuit, relates in particular to a kind of Thermal Cutoffs.
Background technology
Thermal Cutoffs is the device that one-time action can not reset, and is widely used in the heat protection of equipment, prevents that under the condition of fault one or more positions from reaching dangerous temperature.Existing Thermal Cutoffs is mainly based on alloy-type temperature fuse, constitute with the disconnected agent of fluxing by having low-melting fusible alloy, be encapsulated in the shell of plastics or pottery, under normal operation, fusible alloy keeps being connected with two pins, when Thermal Cutoffs is experienced abnormal heating and reach predetermined melting temperature, the fusible alloy fusing, and under the effect of the disconnected agent of fluxing open circuit.
The Thermal Cutoffs of prior art, because fusible alloy is connected with two pin straight lines, in the process of action, usually because two pin electric currents are excessive, cause electric arc to produce, and then cause phenomenons such as the Thermal Cutoffs product sparkles, burning, bring certain hidden danger to use, therefore, based on the consideration on the safety, the utility model provides a kind of Thermal Cutoffs, structurally carries out the design of arc protection, can effectively reduce the arcing in the course of action, avoid sparkling, potential safety hazard such as burning.
Summary of the invention
The utility model is realized by following scheme: a kind of Thermal Cutoffs, comprise metal pins, seal resin, shell, flux disconnected agent, fusible alloy, the head of metal pins and the two ends of fusible alloy are welded to connect, fusible alloy and part metals pin are by sealing resin-encapsulated in the shell insulating space, and at shell with seal and fill the disconnected agent of fluxing in the inside confined space of resin-encapsulated, it is characterized in that: fusible alloy and metal pins are down " M " shape, described shell has inwardly protruded triangular shape in the bottom.
The utility model is compared with existing technology, in the process of action, because shell has inwardly protruded triangular shape, the effective electric arc at barrier metal pin two ends, therefore reduce the generation of electric arc, avoid sparkling, potential safety hazard such as burning, it is safe in utilization to improve Thermal Cutoffs, after the disconnection, the fusible alloy of fusing can deposit outer casing bottom, the fusible alloy that can effectively intercept fusing of the triangular shape of shell projection connects once more, permanent open circuit, thereby improve safe in utilization.
Description of drawings
Fig. 1 is the utility model schematic cross-section.
Fig. 2 is existing Thermal Cutoffs schematic cross-section.
Among Fig. 1: 1-metal pins, 2-seal resin, 3-shell, 4-flux disconnected agent, 5-fusible alloy.
Among Fig. 2: 1 '-metal pins, 2 '-seal resin, 3 '-shell, 4 '-flux disconnected agent, 5 '-fusible alloy.
Embodiment
A kind of Thermal Cutoffs, comprise metal pins (1), seal resin (2), shell (3), the disconnected agent (4) of fluxing, fusible alloy (5), the two ends of the head of metal pins (1) and fusible alloy (5) are welded to connect, fusible alloy (5) and part metals pin (1) are encapsulated in shell (3) insulating space by sealing resin (2), and at shell (3) with seal in the inside confined space of resin (2) encapsulation the filling disconnected agent (4) of fluxing, it is characterized in that: fusible alloy (5) and metal pins (1) are down " M " shape, described shell (3) has inwardly protruded triangular shape in the bottom.In the process of action, shell (3) has inwardly protruded triangular shape, the effective electric arc at barrier metal pin (1) two ends, after the disconnection, the fusible alloy (5) of fusing can deposit shell (3) bottom, the fusible alloy (5) that can effectively intercept fusing of the triangular shape of shell (3) projection connects once more, permanent open circuit, thereby improve safe in utilization.
Claims (1)
1. Thermal Cutoffs, comprise metal pins (1), seal resin (2), shell (3), the disconnected agent (4) of fluxing, fusible alloy (5), the two ends of the head of metal pins (1) and fusible alloy (5) are welded to connect, fusible alloy (5) and part metals pin (1) are encapsulated in shell (3) insulating space by sealing resin (2), and at shell (3) with seal in the inside confined space of resin (2) encapsulation the filling disconnected agent (4) of fluxing, it is characterized in that: fusible alloy (5) and metal pins (1) are down " M " shape, described shell (3) has inwardly protruded triangular shape in the bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201294982U CN203085467U (en) | 2013-03-21 | 2013-03-21 | Thermal fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201294982U CN203085467U (en) | 2013-03-21 | 2013-03-21 | Thermal fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203085467U true CN203085467U (en) | 2013-07-24 |
Family
ID=48831283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201294982U Expired - Fee Related CN203085467U (en) | 2013-03-21 | 2013-03-21 | Thermal fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203085467U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161356A (en) * | 2015-08-24 | 2015-12-16 | 兴勤（常州）电子有限公司 | Temperature fuse module |
| CN106601570A (en) * | 2017-01-10 | 2017-04-26 | 上海查尔斯电子有限公司 | Fuse |
| WO2019001590A1 (en) * | 2017-06-30 | 2019-01-03 | 厦门赛尔特电子有限公司 | High-voltage direct-current thermal fuse |
-
2013
- 2013-03-21 CN CN2013201294982U patent/CN203085467U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161356A (en) * | 2015-08-24 | 2015-12-16 | 兴勤（常州）电子有限公司 | Temperature fuse module |
| CN106601570A (en) * | 2017-01-10 | 2017-04-26 | 上海查尔斯电子有限公司 | Fuse |
| WO2019001590A1 (en) * | 2017-06-30 | 2019-01-03 | 厦门赛尔特电子有限公司 | High-voltage direct-current thermal fuse |
| US11049683B2 (en) * | 2017-06-30 | 2021-06-29 | Xiamen Set Electronics Co., Ltd | High-voltage direct-current thermal fuse |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20140321 |