CN202678007U - Varistor with self-protection function - Google Patents
Varistor with self-protection function Download PDFInfo
- Publication number
- CN202678007U CN202678007U CN 201220092250 CN201220092250U CN202678007U CN 202678007 U CN202678007 U CN 202678007U CN 201220092250 CN201220092250 CN 201220092250 CN 201220092250 U CN201220092250 U CN 201220092250U CN 202678007 U CN202678007 U CN 202678007U
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- self
- pin
- varistor
- protection function
- piezo
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Abstract
The utility model discloses a varistor with a self-protection function. The varistor with the self-protection function comprises a voltage-dependent chip and two electrode leading-out pins, the electrode leading-out pins of the varistor are made of elastic materials, a certain included angle is arranged between each electrode elastic leading-out pin and the voltage-dependent chip, and each electrode elastic leading-out pin and the voltage-dependent chip are welded together through low-melting-point metal materials. When the varistor with the self-protection function is used, the distance between mounting holes on a printed circuit board (PCB) is shorter than the natural distance between the two electrode leading-out pins, the elastic leading-out pins are enabled to bear elastic pressure; and when the varistor degrades, the temperature of the varistor rises to melt the low-melting-point metal materials, and therefore each elastic leading-out pin can be separated from the connection with the voltage-dependent chip and plays the role of self protection. The varistor with the self-protection function is simple in structure and easy to manufacture and use, and has broad application prospects.
Description
Technical field
The utility model discloses a kind of piezo-resistance that prevents surge.
Background technology
Piezo-resistance is extensively used protection electronic circuit and power-supply system owing to its special voltage-current characteristic, makes other coupled electronic equipment avoid the infringement of overvoltage/overcurrent.But, because piezo-resistance is deteriorated or when damaging, show as short circuit phenomenon, thereby cause electronic equipment or power system failure.For addressing this problem, the many schemes of prior art hot release unit and make lightning protection device in series connection on the piezo-resistance, when the piezo-resistance degradation temperatures raises gradually, hot release unit action makes piezo-resistance in time break away from protected circuit, avoids piezo-resistance faults itself reason to cause line fault; Also has thermistor on piezo-resistance is connected in the prior art scheme, when the piezo-resistance degradation temperatures raises, by contacting of thermistor blocking-up piezo-resistance and protection circuit.Above-mentioned pressure limiting technical scheme is owing to needing external tandem arrangement or device, complex structure, and cost increases, and is unfavorable for making.
Summary of the invention
For above-mentioned the problems of the prior art of mentioning, the utility model provides a kind of piezo-resistance with self-protection function.
A kind of have a self-protection function piezo-resistance; comprise a voltage dependent resistor chip; two leading foots; it is characterized in that: it is that elastomeric material is made that a pin is wherein arranged; the insulated voltage dependent resistor chip surface that is fixed on of the interlude of this pin, weld with low-melting-point metal at an electrode that bears under the state of elastic pressure with voltage dependent resistor chip an end of pin.
Described have a self-protection function piezo-resistance; it is characterized in that: another pin also is that elastomeric material is made; the insulated voltage dependent resistor chip surface that is fixed on of the interlude of this pin, weld with low-melting-point metal at another electrode that bears under the state of elastic pressure with voltage dependent resistor chip an end of pin.
Described have a self-protection function piezo-resistance, and it is characterized in that: described pin only has the stretch section that joins with chip varistor to be made by elastomeric material.
Described have a self-protection function piezo-resistance, and it is characterized in that: the material of described elasticity pin is the phosphor-copper material.
The utility model provide the self-protection function piezo-resistance arranged; electrode lead-out pins is made with elastomeric material; weld with low-melting-point metal with the tie point of chip varistor; deteriorated or when meeting with overvoltage and damaging temperature and raise when piezo-resistance; rely on self elastic force of pin to be separated from chip varistor; do not need extra hot release unit or the thermistor that increases series connection; simple in structure; volume is not with there being the piezo-resistance of hot release unit suitable, and in the circuit board installation does not additionally increase the space and is conducive to use.
Description of drawings
Fig. 1 is that the utility model has self-protection function piezo-resistance structural representation.
Fig. 2 is that the pressure-sensitive pin of the utility model self-shield takes off pressure-sensitive electrode schematic diagram.
1 is chip varistor shown in the figure, and 2,3 is two leading foots, and 4 are the insulation immobilization material, and A is the pad of chip varistor and pin, and 5 is the interlude of pin, and 6 is stretch section
Embodiment
The present embodiment is the utility model preferred implementation, and other all its principles are identical with the present embodiment or approximate with basic structure, all within the utility model protection range.
Please referring to accompanying drawing 1; of the present utility model have a self-protection function piezo-resistance; comprise chip varistor 1; leading foot 2 and 3; chip varistor 1 other surface except pad A is done insulation and is sealed processing; wherein leading foot 3 is made by elastomeric material; interlude 5 usefulness insulating material 4 are fixed on the surface of chip varistor 1; before pin 3 and the piezoresistance electrode welding as shown in Figure 2; the welding termination of pin 3 and the pad A of chip varistor 1 have certain distance; because pin 3 has elasticity, when welding, firmly be depressed into A point with the low-melting-point metal welding, after the welding well as shown in Figure 1.Deteriorated or meet with overvoltage and damage temperature and raise gradually when piezo-resistance, when melt to low-melting-point metal, make it break away from welding A point by the elastic force of pin 3 self, recover state shown in Figure 2, piezo-resistance disengaging protected circuit reaches the effect of self-protection.
The utility model also can also be made another pin 2 of elastomeric material, its installation principle is same as above the same with mode.Deteriorated or meet with overvoltage and damage temperature and raise gradually when piezo-resistance, when melt to low-melting-point metal, as long as any in the two pins be because of elastic force disengaging pad of self, piezo-resistance can both break away from protected circuit, reaches the effect of self-protection.
This experiment is novel the self-protection function piezo-resistance, also can only insulation immobilization material 4 to this section of welding termination be made with elastomeric material, this section called after stretch section 6 in the utility model, other of stretch section 6 and pin partly advances to be connected with any feasible modes such as welding, and other of pin partly made of the common material of electronic component pin; So only need to adjust the size of stretch section elastic force, just can effectively control pin and in time break away from chip varistor.
In order to increase the electric conductivity of pin, the material tool of pin has certain flexible phosphor-copper.
Of the present utility model have a self-protection function piezo-resistance; electrode lead-out pins is made with elastomeric material; do not need to increase other extra device, just can play piezo-resistance in time effect of disengaging circuit when deteriorated, have the function of self-protection; simple in structure; cost is low, is easy to produce, and convenient the use installed; particularly to the restricted equipment of some installing spaces, has extraordinary utilization prospect.
Claims (5)
1. one kind has the self-protection function piezo-resistance; comprise a voltage dependent resistor chip (1); two leading foots (2,3); it is characterized in that: it is that elastomeric material is made that a pin (3) is wherein arranged; weld with low-melting-point metal with voltage dependent resistor chip (1) bearing under the state of elastic pressure on insulated voltage dependent resistor chip (1) surface that is fixed on of the interlude of this pin (5), pin (3).
2. as claimed in claim 1 have a self-protection function piezo-resistance; it is characterized in that: another pin (2) also is that elastomeric material is made; weld with low-melting-point metal with voltage dependent resistor chip (1) bearing under the state of elastic pressure on the insulated voltage dependent resistor chip surface that is fixed on of the interlude of this pin (5), pin (2).
3. as claimed in claim 1 or 2 have a self-protection function piezo-resistance, and it is characterized in that: described pin only has the stretch section (6) that welds mutually with chip varistor to be made by elastomeric material.
4. as claimed in claim 1 or 2 have a self-protection function piezo-resistance, and it is characterized in that: the material of described elasticity pin is the phosphor-copper material.
5. as claimed in claim 3 have a self-protection function piezo-resistance, and it is characterized in that: the material of described elasticity pin is the phosphor-copper material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220092250 CN202678007U (en) | 2012-03-12 | 2012-03-12 | Varistor with self-protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220092250 CN202678007U (en) | 2012-03-12 | 2012-03-12 | Varistor with self-protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202678007U true CN202678007U (en) | 2013-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220092250 Expired - Fee Related CN202678007U (en) | 2012-03-12 | 2012-03-12 | Varistor with self-protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202678007U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104103632A (en) * | 2013-04-10 | 2014-10-15 | 李博 | Self-protection transistor |
| CN105185492A (en) * | 2015-08-24 | 2015-12-23 | 兴勤（常州）电子有限公司 | Thermal protection piezoresistor |
| CN107946011A (en) * | 2017-10-12 | 2018-04-20 | 爱普科斯电子元器件(珠海保税区)有限公司 | A kind of embedded varistor with heat protection function |
| CN109427454A (en) * | 2017-08-31 | 2019-03-05 | Seg汽车德国有限公司 | The structural unit of resistive element in circuit with the structural unit for being installed to electricity with negative temperature coefficient and being arranged for |
| CN109923625A (en) * | 2017-10-13 | 2019-06-21 | 东莞令特电子有限公司 | Thermal protection metal-oxide varistor |
-
2012
- 2012-03-12 CN CN 201220092250 patent/CN202678007U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104103632A (en) * | 2013-04-10 | 2014-10-15 | 李博 | Self-protection transistor |
| CN105185492A (en) * | 2015-08-24 | 2015-12-23 | 兴勤（常州）电子有限公司 | Thermal protection piezoresistor |
| CN109427454A (en) * | 2017-08-31 | 2019-03-05 | Seg汽车德国有限公司 | The structural unit of resistive element in circuit with the structural unit for being installed to electricity with negative temperature coefficient and being arranged for |
| CN107946011A (en) * | 2017-10-12 | 2018-04-20 | 爱普科斯电子元器件(珠海保税区)有限公司 | A kind of embedded varistor with heat protection function |
| CN109923625A (en) * | 2017-10-13 | 2019-06-21 | 东莞令特电子有限公司 | Thermal protection metal-oxide varistor |
| CN109923625B (en) * | 2017-10-13 | 2021-01-15 | 东莞令特电子有限公司 | Thermally protected metal oxide piezoresistor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: He Chaoxia Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: He Chaoxia Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20150312 |
|
| EXPY | Termination of patent right or utility model |