CN205069566U - SMD excess temperature overcurrent protection fuse - Google Patents
SMD excess temperature overcurrent protection fuse Download PDFInfo
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- CN205069566U CN205069566U CN201520797027.8U CN201520797027U CN205069566U CN 205069566 U CN205069566 U CN 205069566U CN 201520797027 U CN201520797027 U CN 201520797027U CN 205069566 U CN205069566 U CN 205069566U
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- resistance wire
- overcurrent protection
- overtemperature
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Abstract
The utility model provides a SMD excess temperature overcurrent protection fuse, includes ceramic pipe, ceramic substrate, copper cap, resistance wire and electrode centre gripping spare. Ceramic substrate's both ends are equipped with a conductive electrode respectively, and conductive electrode is connected with the resistance wire, and it sets up in ceramic substrate's recess to establish ties through the temperature fuse between the resistance wire, and the ceramic substrate through the electrode holder sets up in the interior intracavity of ceramic pipe, and the cavity intussuseption between ceramic substrate and the ceramic pipe is filled with explosion -proof sand, and the copper cap sleeve closes the both ends of ceramic pipe. The temperature fuse is when suppressing the high current or the short circuit appearing, and operating temperature fuses when exceeding the setting to cut off the return circuit, protection circuit and electronic components have reduced the loss, explosion -proof sand can prevent that the electric spark from producing, and when operating temperature is too big, silk or resistance wire fusing are dissolved to the temperature, just can not blast, phenomenon such as burning safety and stability nature height. And, this SMD excess temperature overcurrent protection fuse's simple structure, small, only need during the assembly with its embedding can, convenient and fast.
Description
Technical field
The utility model relates to technical field of electronic components, particularly relates to a kind of SMD overtemperature and overcurrent protection fuse.
Background technology
SMD fuse, as a kind of common electronic devices and components, has become one of most widely used a kind of resistor.Along with the fast development of electronics and information industry, the requirement of the aspect such as highly dense attachment, high transfer rate, high reliability of electronic devices and components is improved constantly, traditional SMD fuse structure will realize these New function, face the bottleneck of structure and cost, thus cause resistance to be subject to severely restricts in the application of these new occasions.The safety problem considering that circuit runs is needed in application, if voltage input is excessive, electric current input is excessive or short circuit appears in certain components and parts, exceed setting, SMD fuse will not defer to Ohm's law because of overheated, even also can be burnt, blast, thus the circuit that also can burn out in circuit or electronic devices and components, greatly strengthen loss.
Utility model content
Based on this, be necessary for traditional SMD fuse Problems existing, provide a kind of stable performance, at the SMD overtemperature and overcurrent protection fuse suppressing protective circuit under high current, nonflammable, blast.
This SMD overtemperature and overcurrent protection fuse, comprises earthenware, ceramic substrate, conductive electrode, temperature fuse, copper cap, resistance wire, electrode holder gripping member; The two ends of described ceramic substrate are respectively equipped with one first conductive electrode, described resistance wire comprises two sections and interval is located on described ceramic substrate, the outboard end of each described resistance wire connects with the first corresponding conductive electrode respectively, is connected between two sections of described resistance wires by described temperature fuse; The two ends of described earthenware are provided with opening, described electrode holder gripping member is located in the described opening of described earthenware respectively, described electrode holder gripping member offers groove, described ceramic substrate is located in described earthenware, the two ends of described ceramic substrate stretch out in described electrode holder gripping member respectively by described groove, and the two ends of earthenware described in described copper cap closure and inwall are connected with described first conductive electrode of described ceramic substrate end.
Wherein in an embodiment, described ceramic substrate offers two grooves, described resistance wire is located in described groove respectively.
Wherein in an embodiment, described resistance wire becomes roundabout bending to be arranged in described groove.
Wherein in an embodiment, also comprise two blocks of sheet glass, described sheet glass covers on corresponding described resistance wire respectively.
Wherein in an embodiment, the other end of two sections of described resistance wires is connected with one second conductive electrode respectively, and the two ends of described temperature fuse are connected with described resistance wire respectively by described second conductive electrode.
Wherein in an embodiment, between described ceramic substrate and described earthenware, be filled with explosion-proof sand.
Wherein in an embodiment, described earthenware is square or circular.
Wherein in an embodiment, described electrode holder gripping member is made up of tin metal.
Wherein in an embodiment, described copper cap surface has silver coating.
Above-mentioned SMD overtemperature and overcurrent protection fuse; ceramic substrate is provided with in the inner chamber of earthenware; temperature fuse is provided with between resistance wire on ceramic substrate; temperature fuse is when suppressing high current or occurring short circuit; working temperature fuses when exceeding setting; thus cut-off loop, protective circuit and electronic devices and components, decrease loss.Earthenware and ceramic substrate serve effect that is heat insulation and insulation when the molten silk of temperature fuses, make this resistance safety and stability more.And this SMD overtemperature and overcurrent protects the simple and reasonable of fuse, and volume is little, only need be embedded during assembling, convenient and swift.
Explosion-proof sand can prevent electric spark from producing, and when working temperature is excessive, the molten silk of temperature or resistance wire fusing, would not blast, the phenomenon such as burning, and security and stability is high.
Electrode holder gripping member adopts tin metal to make, and tin can fuse when operating current is excessive, better protects circuit and electronic devices and components.
Above resistance wire, be stamped sheet glass, better protective resistance, serve the effect of insulation.
Copper cap is coated with one deck silver, better reduces resistance, avoid corrosion, prevent copper cap to be oxidized and reduce electric conductivity.
Accompanying drawing explanation
Fig. 1 is the decomposing schematic representation of the utility model SMD overtemperature and overcurrent protection fuse;
Fig. 2 is the vertical view after the SMD overtemperature and overcurrent protection fuse assembling shown in Fig. 1;
Fig. 3 is the generalized section along A-A line of the SMD overtemperature and overcurrent protection fuse shown in Fig. 2.
Embodiment
For the ease of understanding the utility model, below with reference to relevant drawings, the utility model is described more fully.Preferred embodiment of the present utility model is given in accompanying drawing.But the utility model can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make the understanding of disclosure of the present utility model more comprehensively thorough.
It should be noted that, when element is called as " being fixed on " another element, directly can there is element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may there is centering elements simultaneously.
Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model understand usually.The object of the term used in specification of the present utility model herein just in order to describe specific embodiment, is not intended to be restriction the utility model.
Referring to Fig. 1 to Fig. 3, the SMD overtemperature and overcurrent protection fuse 10 of a preferred embodiment of the present utility model, comprises earthenware 20, ceramic substrate 30, copper cap 21, electrode holder gripping member 22, is arranged on resistance wire 32 on ceramic substrate 30 and temperature fuse 34; The two ends of ceramic substrate 30 are respectively equipped with one first conductive electrode 31, and resistance wire 32 comprises two sections and interval is all located on ceramic substrate 30, is connected between two sections of resistance wires 32 by described temperature fuse 34; Electrode holder gripping member 22 is located in the opening 24 of earthenware 20 respectively, electrode holder gripping member 22 offers groove 23, ceramic substrate 30 is located in earthenware 20, electrode holder gripping member 22 is stretched out respectively by groove 23 in the two ends of ceramic substrate 30, and the two ends of earthenware 20 closed by copper cap 21 and inwall is connected with the first conductive electrode 31 of the end of 30.
In the present embodiment, the two ends of ceramic substrate 30 are respectively equipped with described first conductive electrode 31, ceramic substrate 30 offers two grooves 33, every section of resistance wire 32 becomes roundabout bending to be arranged in each groove 33 respectively, one end of resistance wire 32 is connected with the first conductive electrode 31, the other end of resistance wire 32 is connected with the second conductive electrode 36, and the two ends of temperature fuse 34 are connected with resistance wire 32 respectively by the second conductive electrode 36.The top of every section of resistance wire 32 is coated with the sheet glass 35 that a slice is mated with groove 33 respectively, and better protective resistance, serves the effect of insulation.
Please referring again to Fig. 3, the two ends of the ceramic substrate 30 assembled are clamped in the groove 23 in an electrode holder gripping member 22 respectively, electrode holder gripping member 22 is made up of tin metal, and the opening 24 that electrode holder gripping member 22 and the two ends of earthenware 20 are offered mates to be suitable for makes ceramic substrate 30 be arranged in earthenware 20.Explosion-proof husky 40 are filled with in the cavity that earthenware 20 and ceramic substrate 30 are formed.Explosion-proof husky 40 can prevent electric spark from producing, and when working temperature is excessive, the molten silk 34 of temperature or resistance wire 32 fuse, and would not blast, the phenomenon such as burning, and security and stability is high.Electrode holder gripping member 22 adopts tin metal to make, and tin can fuse when operating current is excessive, better protects circuit and electronic devices and components, serves the effect of duplicate protection.
Above-described first conductive electrode 31, second conductive electrode 32, resistance wire 32, temperature fuse 34 and sheet glass 35 are printed on ceramic substrate 30 by printing equipment to be made, and prints all shaping by high temperature sintering each time.
Earthenware 20 is square setting, and with the two ends of the copper cap 21 fit earthenware 20 with earthenware 20 adaptation, realizes being electrically connected with conductive electrode 31, there is silver coating on the surface of copper cap 21, better reduction resistance, avoids corrosion, prevents copper cap 21 to be oxidized and reduces electric conductivity.In other embodiments, it is flat shape that this earthenware 20 can also be set to bottom surface, and other face is that arc is arranged, to ensure that smooth can being sticked with circuit board in bottom surface is installed.
Comprehensive appeal; in this SMD overtemperature and overcurrent protection fuse 10; connected by temperature fuse 34 between resistance wire 32 on ceramic substrate 30; temperature fuse 34 is when suppressing high current or occurring short circuit; working temperature fuses when exceeding setting; thus cut-off loop, protective circuit and electronic devices and components, decrease loss.Due to the setting of earthenware 20 and ceramic substrate 30, serve effect that is heat insulation and insulation when the molten silk of temperature 34 fuses, safety and stability more.This SMD overtemperature and overcurrent protects the simple and reasonable of fuse 10, and volume is little, only need be embedded during assembling, convenient and swift.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification is recorded.
The above embodiment only have expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (9)
1. a SMD overtemperature and overcurrent protection fuse, is characterized in that, comprising: earthenware, ceramic substrate, conductive electrode, temperature fuse, copper cap, resistance wire, electrode holder gripping member; The two ends of described ceramic substrate are respectively equipped with one first conductive electrode, described resistance wire comprises two sections and interval is located on described ceramic substrate, the outboard end of each described resistance wire connects with the first corresponding conductive electrode respectively, is connected between two sections of described resistance wires by described temperature fuse; The two ends of described earthenware are provided with opening, described electrode holder gripping member is located in the described opening of described earthenware respectively, described electrode holder gripping member offers groove, described ceramic substrate is located in described earthenware, the two ends of described ceramic substrate stretch out in described electrode holder gripping member respectively by described groove, and the two ends of earthenware described in described copper cap closure and inwall are connected with described first conductive electrode of described ceramic substrate end.
2. SMD overtemperature and overcurrent protection fuse according to claim 1, it is characterized in that, described ceramic substrate offers two grooves, described resistance wire is located in described groove respectively.
3. SMD overtemperature and overcurrent protection fuse according to claim 2, it is characterized in that, described resistance wire becomes roundabout bending to be arranged in described groove.
4. SMD overtemperature and overcurrent protection fuse according to claim 1, it is characterized in that, also comprise two blocks of sheet glass, described sheet glass covers on corresponding described resistance wire respectively.
5. SMD overtemperature and overcurrent protection fuse according to claim 1; it is characterized in that; the other end of each described resistance wire is connected with one second conductive electrode respectively, and the two ends of described temperature fuse are connected with described resistance wire respectively by described second conductive electrode.
6. SMD overtemperature and overcurrent protection fuse according to claim 1, is characterized in that, be filled with explosion-proof sand between described ceramic substrate and described earthenware.
7. SMD overtemperature and overcurrent protection fuse according to claim 1, it is characterized in that, described earthenware is square.
8. SMD overtemperature and overcurrent protection fuse according to claim 1, it is characterized in that, described electrode holder gripping member is made up of tin metal.
9. SMD overtemperature and overcurrent protection fuse according to claim 1, it is characterized in that, described copper cap surface has silver coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520797027.8U CN205069566U (en) | 2015-10-14 | 2015-10-14 | SMD excess temperature overcurrent protection fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520797027.8U CN205069566U (en) | 2015-10-14 | 2015-10-14 | SMD excess temperature overcurrent protection fuse |
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| Publication Number | Publication Date |
|---|---|
| CN205069566U true CN205069566U (en) | 2016-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520797027.8U Active CN205069566U (en) | 2015-10-14 | 2015-10-14 | SMD excess temperature overcurrent protection fuse |
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| CN (1) | CN205069566U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9972991B2 (en) | 2016-05-20 | 2018-05-15 | Polytronics Technology Corp. | Protection device and circuit protection apparatus containing the same |
| CN112242219A (en) * | 2019-07-17 | 2021-01-19 | 斯玛特电子公司 | Fuse-resistor assembly and method of manufacturing a fuse-resistor assembly |
-
2015
- 2015-10-14 CN CN201520797027.8U patent/CN205069566U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9972991B2 (en) | 2016-05-20 | 2018-05-15 | Polytronics Technology Corp. | Protection device and circuit protection apparatus containing the same |
| CN112242219A (en) * | 2019-07-17 | 2021-01-19 | 斯玛特电子公司 | Fuse-resistor assembly and method of manufacturing a fuse-resistor assembly |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |