CN203813411U - Thermal protection type piezoresistor - Google Patents
Thermal protection type piezoresistor Download PDFInfo
- Publication number
- CN203813411U CN203813411U CN201420014575.4U CN201420014575U CN203813411U CN 203813411 U CN203813411 U CN 203813411U CN 201420014575 U CN201420014575 U CN 201420014575U CN 203813411 U CN203813411 U CN 203813411U
- Authority
- CN
- China
- Prior art keywords
- electrode layer
- silver electrode
- pin
- protection type
- hot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 53
- 229910052709 silver Inorganic materials 0.000 claims abstract description 53
- 239000004332 silver Substances 0.000 claims abstract description 53
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000003466 welding Methods 0.000 claims abstract description 20
- 239000000919 ceramic Substances 0.000 claims abstract description 19
- 239000011787 zinc oxide Substances 0.000 claims abstract description 19
- 239000003822 epoxy resin Substances 0.000 claims abstract description 9
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 9
- 238000005452 bending Methods 0.000 claims abstract description 8
- 229960001296 zinc oxide Drugs 0.000 claims description 16
- 230000008719 thickening Effects 0.000 claims description 12
- 229910000679 solder Inorganic materials 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Abstract
The utility model discloses a thermal protection type piezoresistor. The thermal protection type piezoresistor comprises a zinc oxide piezoresistor ceramic chip, silver electrode layers, an insulating sheet, a first pin, a second pin, a thermal-fusing fuse and an epoxy resin outer wrapping layer. The upper surface and the lower surface of the zinc oxide piezoresistor ceramic chip are respectively provided with a silver electrode layer. The first pin is welded on the silver electrode layer on the lower surface of the zinc oxide piezoresistor ceramic chip. The epoxy resin outer wrapping layer wraps a body. The second pin is fixed on one side of the silver electrode layer on the upper surface through the insulating sheet. One end of the thermal-fusing fuse is welded with the inner end of the second pin while the other end is correspondingly welded with the other end of the silver electrode layer. The thermal-fusing fuse part on the welding end of the second pin is provided with a bending part bending outwards. An offset gap is formed between the thermal-fusing fuse and the silver electrode layer on the upper surface through the bending part. The thermal protection type piezoresistor ensures a required gap between the fuse and the silver electrode layer plane. Furthermore, the thermal protection type piezoresistor guarantees that no solder balls or false welding will be generated when the fuse and the pin are welded.
Description
Technical field
The utility model relates to a kind of piezo-resistance, more particularly, relates in particular to a kind of hot protection type piezo-resistance.
Background technology
Heat protection piezo-resistance series is representing the new development of protection using integrated circuit.It is made up of multiple radial lead burning piezo-resistances, comprises one and is exclusively used in the overheated integrated thermal active element that causes disconnecting causing because of the various conditions of abnormal overvoltage, Limited Current and UL1449 general introduction.Current design insurance silk is linearity.In order to meet the requirement disconnecting, between fuse and silver-colored face, need gappedly, simultaneously fuse and pin weld that time point can produce tin ball or dry joint causes product failure.Therefore, how to address the above problem, become problem demanding prompt solution.
Utility model content
The purpose of this utility model is for above-mentioned the deficiencies in the prior art, provides required gapped between a kind of guarantee insurance silk and silver-colored face, and can ensure to avoid to produce tin ball or dry joint in the time of the welding of fuse and pin and hot protection type piezo-resistance.
The technical solution of the utility model is such: a kind of hot protection type piezo-resistance, comprise Zinc-oxide piezoresistor ceramics, silver electrode layer, insulating trip, the first pin, the second pin, hot fuse wire and epoxy resin surrounding layer, the upper and lower surface of Zinc-oxide piezoresistor ceramics is respectively equipped with silver electrode layer, the first pin is welded on the silver electrode layer of Zinc-oxide piezoresistor ceramics lower surface, epoxy resin surrounding layer parcel body, its second pin is fixed on a side of the silver electrode layer of upper surface by insulating trip, the inner welding of one end of hot fuse wire and the second pin, the other end is corresponding to be welded with the opposite side of silver electrode layer, hot fuse wire is provided with the kink of bending laterally at the welding ends of the second pin, between the silver electrode layer of kink and upper surface, form skew gap.
Above-mentioned hot protection type piezo-resistance, the inner overlap joint welding of the end of hot fuse wire and the second pin.
Above-mentioned hot protection type piezo-resistance, the silver electrode layer surface of upper and lower surface is provided with the thickening silver electrode layer of annular.
Above-mentioned hot protection type piezo-resistance, kink is curved.
Above-mentioned hot protection type piezo-resistance, insulating trip and the second pin are fixed on a side of the silver electrode layer of upper surface by PUR.
Above-mentioned hot protection type piezo-resistance, the thickening silver electrode layer welding of the other end of hot fuse wire and upper surface.
Above-mentioned hot protection type piezo-resistance, Zinc-oxide piezoresistor ceramics entirety is circular, and silver electrode layer covers the upper and lower surface of circular Zinc-oxide piezoresistor ceramics, and thickening silver electrode layer is concentric circles annular and is arranged on silver electrode layer surface.
Adopt the utility model of technique scheme, by hot fuse wire at the kink bending laterally with the inner welding ends setting of the second pin, between the silver electrode layer of kink and upper surface, form skew gap, the skew gap forming can ensure gap between hot fuse wire and silver electrode layer, overlap joint welding simultaneously can contact copper cash tin ball or dry joint when stopping fuse and copper wire welding completely and occur, thus the stabilised quality of guarantee product.Thereby the thickening silver electrode layer of annular thickening conductive electrode strengthens through-current capability.
The utility model is applied to SPD product, alternating current circuit panel protection module, alternating current circuit power supply, surge protection bar connector, ac power meter, repositionable AC power tap, GFCI(ground-fault interrupter), UPS(uninterruptible power system), white domestic appliances, plug-in type SPD, current transformer and AC/DC power supply etc.
Brief description of the drawings
Below in conjunction with the embodiment in accompanying drawing, the utility model is described in further detail, but do not form any restriction of the present utility model.
Fig. 1 is the cross-sectional view of the utility model instantiation;
Fig. 2 is the syndeton schematic diagram of the concrete upper surface of the utility model;
Fig. 3 is the structural representation of the hot fuse wire of the utility model.
In figure: Zinc-oxide piezoresistor ceramics 1, silver electrode layer 2, thickening silver electrode layer 21, insulating trip 3, the first pin 4, the second pins 5, hot fuse wire 6, kink 61, epoxy resin surrounding layer 7, PUR 8.
Embodiment
Consult shown in Fig. 1～3, the hot protection type piezo-resistance of one of the present utility model, comprise Zinc-oxide piezoresistor ceramics 1, silver electrode layer 2, insulating trip 3, the first pin 4, the second pin 5, hot fuse wire 6 and epoxy resin surrounding layer 7, the upper and lower surface of Zinc-oxide piezoresistor ceramics 1 is respectively equipped with silver electrode layer 2, the first pin 4 is welded on the silver electrode layer 2 of Zinc-oxide piezoresistor ceramics 1 lower surface, epoxy resin surrounding layer 7 wraps up body, wherein: the second pin 5 is fixed on a side of the silver electrode layer 2 of upper surface by insulating trip 3, the inner welding of one end of hot fuse wire 6 and the second pin 5, the other end is corresponding to be welded with the opposite side of silver electrode layer 2, hot fuse wire 6 is provided with the kink 61 of bending laterally at the welding ends of the second pin 5, between the silver electrode layer 2 of kink 61 and upper surface, form skew gap.
The end of hot fuse wire 6 and the inner overlap joint welding of the second pin 5.
Silver electrode layer 2 surface of upper and lower surface are provided with the thickening silver electrode layer 21 of annular.
Kink 61 is curved.
Insulating trip 3 and the second pin 5 are fixed on a side of the silver electrode layer 2 of upper surface by PUR 8.
The thickening silver electrode layer 21 of the other end of hot fuse wire 6 and upper surface welds.
Zinc-oxide piezoresistor ceramics 1 entirety is circular, and silver electrode layer 2 covers the upper and lower surface of circular Zinc-oxide piezoresistor ceramics 1, and thickening silver electrode layer 21 is concentric circles annular and is arranged on silver electrode layer 2 surface.
The utility model in the time of concrete use hot fuse wire 6 at the kink 61 bending laterally with the welding ends setting of second pin 5 the inners, between the silver electrode layer 2 of kink 61 and upper surface, form skew gap, the skew gap forming can ensure gap between hot fuse wire 6 and silver electrode layer 2, overlap joint welding simultaneously can contact copper cash tin ball or dry joint when stopping fuse and copper wire welding completely and occur, thus the stabilised quality of guarantee product.
In sum, the utility model is as specification and diagramatic content, makes actual sample and through repeatedly use test, from the effect of use test, provable the utility model can reach the object that it is expected, practical value is unquestionable.Above illustrated embodiment is only used for conveniently illustrating the utility model, not the utility model is done to any pro forma restriction, under any, in technical field, have and conventionally know the knowledgeable, if not departing from the scope of technical characterictic that the utility model is carried, utilize technology contents that the utility model discloses to make the local equivalent embodiment that changes or modify, and do not depart from technical characterictic content of the present utility model, all still belong in the scope of the utility model technical characterictic.
Claims (7)
1. a hot protection type piezo-resistance, comprise Zinc-oxide piezoresistor ceramics (1), silver electrode layer (2), insulating trip (3), the first pin (4), the second pin (5), hot fuse wire (6) and epoxy resin surrounding layer (7), the upper and lower surface of Zinc-oxide piezoresistor ceramics (1) is respectively equipped with silver electrode layer (2), the first pin (4) is welded on the silver electrode layer (2) of Zinc-oxide piezoresistor ceramics (1) lower surface, epoxy resin surrounding layer (7) parcel body, it is characterized in that: the second pin (5) is fixed on a side of the silver electrode layer (2) of upper surface by insulating trip (3), the inner welding of one end of hot fuse wire (6) and the second pin (5), the other end is corresponding to be welded with the opposite side of silver electrode layer (2), hot fuse wire (6) is provided with the kink (61) of bending laterally at the welding ends of the second pin (5), between the silver electrode layer (2) of kink (61) and upper surface, form skew gap.
2. hot protection type piezo-resistance according to claim 1, is characterized in that: the inner overlap joint welding of the end of hot fuse wire (6) and the second pin (5).
3. hot protection type piezo-resistance according to claim 1, is characterized in that: silver electrode layer (2) surface of upper and lower surface is provided with the thickening silver electrode layer (21) of annular.
4. hot protection type piezo-resistance according to claim 1, is characterized in that: kink (61) is curved.
5. hot protection type piezo-resistance according to claim 1, is characterized in that: insulating trip (3) and the second pin (5) are fixed on a side of the silver electrode layer (2) of upper surface by PUR.
6. hot protection type piezo-resistance according to claim 3, is characterized in that: thickening silver electrode layer (21) welding of the other end of hot fuse wire (6) and upper surface.
7. hot protection type piezo-resistance according to claim 3; it is characterized in that: Zinc-oxide piezoresistor ceramics (1) entirety is for circular; silver electrode layer (2) covers the upper and lower surface of circular Zinc-oxide piezoresistor ceramics (1), and thickening silver electrode layer (21) is concentric circles annular and is arranged on silver electrode layer (2) surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420014575.4U CN203813411U (en) | 2014-01-10 | 2014-01-10 | Thermal protection type piezoresistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420014575.4U CN203813411U (en) | 2014-01-10 | 2014-01-10 | Thermal protection type piezoresistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203813411U true CN203813411U (en) | 2014-09-03 |
Family
ID=51452120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420014575.4U Expired - Lifetime CN203813411U (en) | 2014-01-10 | 2014-01-10 | Thermal protection type piezoresistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203813411U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107565508A (en) * | 2017-10-25 | 2018-01-09 | 四川中光防雷科技股份有限公司 | TVS protective devices with failure breaking function |
-
2014
- 2014-01-10 CN CN201420014575.4U patent/CN203813411U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107565508A (en) * | 2017-10-25 | 2018-01-09 | 四川中光防雷科技股份有限公司 | TVS protective devices with failure breaking function |
| CN107565508B (en) * | 2017-10-25 | 2019-09-27 | 四川中光防雷科技股份有限公司 | TVS protective device with failure breaking function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140903 |