CN2739773Y - Built-in pressure-sensitive chip of surge protector with substrap failure function - Google Patents
Built-in pressure-sensitive chip of surge protector with substrap failure function Download PDFInfo
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- CN2739773Y CN2739773Y CN 200420061842 CN200420061842U CN2739773Y CN 2739773 Y CN2739773 Y CN 2739773Y CN 200420061842 CN200420061842 CN 200420061842 CN 200420061842 U CN200420061842 U CN 200420061842U CN 2739773 Y CN2739773 Y CN 2739773Y
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- sensitive ceramic
- surge protector
- voltage
- ceramic substrate
- pressure
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Abstract
The utility model discloses a built-in pressure-sensitive chip of surge protector with substep failure function, including a pressure-sensitive ceramic basal piece, a conductive coating and an electrode plate, characterized in that the pressure-sensitive ceramic basal piece comprises at least two mutually independent pressure-sensitive ceramic basal piece units. The two opposing surfaces of each pressure-sensitive ceramic basal piece unit are respectively coated with the conductive coating, and the conductive coatings of one side of each pressure-sensitive ceramic basal piece unit are communicated through a common electrode plate. The other side of each pressure-sensitive ceramic basal piece unit is respectively arranged with independent electrode plates. The pressure-sensitive chip of the utility model has the characteristics of reducing the general manufacturing cost of the surge protector and improving the production efficiency. The volume of the surge protector with substep failure function is efficiently decreased, and the utility model is convenient for manufacturing the surge protector with better practicability and stronger protective property.
Description
Technical field
The utility model relates to a kind of chip varistor.
Background technology
Surge Protector is as a kind of novel low-voltage electrical apparatus; be applied to more and more widely in the low voltage electric networks such as communication power supply, computer power supply, civil buildings power supply; can protect power consumption equipment in the electrical network to exempt from the infringement of electromagnetic interference such as thunder and lightning effectively, promptly be popularized.
The core component of Surge Protector is its built-in chip varistor.
In the prior art, generally be coated on both sides conductive coating (adopting silver layer usually) at the voltage-sensitive ceramic substrate, soldering copper electrode slice on conductive coating forms two leads again, thereby constitutes the built-in chip varistor of Surge Protector.
Wherein, the voltage-sensitive ceramic substrate that is adopted is to be material of main part by zinc oxide, adds metal oxides such as small amounts bismuth, cobalt oxide, at high temperature fires to form.
Built-in chip varistor can be encapsulated in the plastic casing of Surge Protector in two ways; a kind of is earlier chip varistor to be wrapped up in front cover layer insulation and moisture to wrap up in seal; only reserve (that is being common said varistor finished product) behind two leads, be fixed in again in the plastic casing of Surge Protector.Another kind of mode is that chip varistor is placed in the cavity prefabricated in the plastic casing of Surge Protector, pours into the insulation and moisture casting glue again, it is wrapped up in be honored as a queen, and only exposes two leads.
Because the situation complexity of surge impact in the electrical network, the surge pulse that the Surge Protector tolerance might occur exceeding causes the chip varistor deterioration failure in the Surge Protector, and might make the chip varistor heating on fire and cause a serious accident.So Surge Protector has all designed the overtemperature protection structure usually.When chip varistor deterioration adstante febre, this overtemperature protection structure can cutoff circuit, makes Surge Protector break away from electric network source, avoids causing major accidents such as fire because of the heating of chip varistor deterioration failure.Above-mentioned overtemperature protection structure is made of following mode usually: adopt low-melting alloy, electrode slice lead of chip varistor end with an elastic conduction metal (as metal spring or reed) is welded.In this mode, low-melting alloy forms a heat protection solder joint, and the heat protection solder joint and the elastic conduction metal that are formed by low-melting alloy constitute the overtemperature protection structure jointly.On circuit connects; one end of an electrode slice lead of chip varistor, heat protection solder joint and elastic conduction metal is connected in series successively and forms series arm, and another electrode slice lead of chip varistor and the other end of elastic conduction metal constitute two external connection end that are connected with external circuit of Surge Protector respectively.When chip varistor deterioration adstante febre, the fusing of heat protection solder joint, the elastic conduction metal flicks, and then disconnects series arm, makes Surge Protector withdraw from power-supply system, is unlikely to the deterioration heating initiation fire because of chip varistor.
But under many circumstances, surge pulse meeting repeatedly occurs in the short period of time to high-density.For example, in summer thunderstorm rain process, just may be by the surge that the cloud layer discharge causes up to thousands of inferior.Just be based on this reason,,, both requiring electronic equipment in the environment that surge impact exists, to work incessantly, requiring again can not be interrupted to some extent the surge protection of electronic equipment as places such as communication station, airport, bank and computer rooms in a lot of occasions.And in above-mentioned technical finesse measure; chip varistor is in case at the deterioration failure midway of thunderstorm rain; will make the action of overtemperature protection structure; allow Surge Protector withdraw from power-supply system; corresponding can not the protection electronic equipment again; be worth expensive electronic equipment and just will be subjected to the threat of thunderstorm surge impact, might make device damage or loss of data, cause heavy losses.Therefore, employed core component in the above-mentioned Surge Protector---built-in chip varistor can not satisfy the requirement that electronic equipment is continued protection.
Though, along with development of technology, the someone has proposed some and has had the varistor product of new construction, as: Chinese utility model patent 01247568.8 disclosed single substrate surface-adhered type varistor, Chinese invention patent 97194094.0 disclosed varistor blocks or the like, but the chip varistor in these products all can not be used to address the above problem.
Expensive electronic equipment is not damaged in order to ensure being worth, the data in the data bank are not lost; also to prevent fire; in actual applications; someone has proposed a kind of mutually redundant Surge Protector scheme; promptly be that two have independently been wrapped up in chip varistor (that is being two varistor finished products) the Surge Protector housing of sealing of packing into; and allow above-mentioned two chip varistors form series arm with heat protection solder joint, elastic conduction metal separately with overtemperature protection structure; after this, more above-mentioned two series arms are in parallel.Like this; when chip varistor wherein is subjected to surge impact and the deterioration adstante febre; the heat protection solder joint that links with it will melt and allow the elastic conduction metal disconnect; the series arm at this chip varistor place is corresponding to be disconnected; the chip varistor that damages quits work and no longer heating, avoids causing accident on fire.But because the series arm at another chip varistor place is not disconnected, Surge Protector still can work on, thereby can continue to implement surge protection to protection object, after thunderstorm rain finishes, and new Surge Protector of integral replacing again.In the surge impact process; the probability of two chip varistor while deteriorations is less relatively; therefore; even deterioration all takes place and lost efficacy in two chip varistors; their failure procedure also is a kind of substep failure procedure with time difference; corresponding; this mutually redundant Surge Protector has just constituted a kind of Surge Protector with substep invalidation functions; it can lose efficacy at a chip varistor; under the situation that the overtemperature protection structure disconnects; an other chip varistor still can provide the surge protection to protection object, and the reliability of its protection has also just obtained bigger raising.But; with regard to such scheme; because having installed two simultaneously, it has wrapped up in the chip varistor sealed (as described above; that is be two varistor finished products); therefore it come down to two independently Surge Protector be connected in parallel in the housing the corresponding manufacturing cost that improves Surge Protector, and the volume of Surge Protector is increased; can not replace being equipped with the Surge Protector of single chip varistor in a large number, corresponding promoting the use of of also limiting this technical conceive.
The utility model content
The purpose of this utility model is that the structure of existing chip varistor is improved; a kind of built-in chip varistor of Surge Protector with substep invalidation functions is provided, and this chip varistor will help to produce the Surge Protector that cost is lower, volume is less and have the substep invalidation functions.
Chip varistor of the present utility model has voltage-sensitive ceramic substrate, conductive coating and electrode slice, it is characterized in that described voltage-sensitive ceramic substrate is made up of at least two separate voltage-sensitive ceramic substrate unit, on two apparent surfaces of each voltage-sensitive ceramic substrate unit, be coated with conductive coating respectively, conductive coating on each voltage-sensitive ceramic substrate unit one side is connected by a common electrical pole piece, is respectively arranged with independently electrode slice on the conductive coating of each voltage-sensitive ceramic substrate unit another side.
In the utility model, set voltage-sensitive ceramic substrate is made up of at least two separate voltage-sensitive ceramic substrate unit, and this voltage-sensitive ceramic substrate unit can be two, three or four or the like.One side among two apparent surfaces of each voltage-sensitive ceramic substrate unit can be connected by above-mentioned common electrical pole piece at grade, also can be connected by above-mentioned common electrical pole piece on Different Plane.
Where necessary, above-mentioned each voltage-sensitive ceramic substrate unit permutation and combination can be become multiple shape, to adapt to specific installation requirement or size.For example, can allow each voltage-sensitive ceramic substrate unit be set up in parallel and form a plate-like structure, also can each voltage-sensitive ceramic substrate unit is superimposed successively (as under the connection of above-mentioned common electrical pole piece, forming a kind of reciprocal accordion structure).
In the utility model, the independently electrode slice on the another side of described each voltage-sensitive ceramic substrate unit no longer is connected with the independently electrode slice of other voltage-sensitive ceramic substrate unit.
When using chip varistor of the present utility model; can draw a public termination (also can directly serve as public termination), an external connection end that is connected with external circuit that makes it to serve as Surge Protector by the above-mentioned common electrical pole piece place that the one side of each voltage-sensitive ceramic substrate unit is communicated with simultaneously by this common electrical pole piece.Simultaneously, by draw respectively on the independently electrode slice on the another side of each voltage-sensitive ceramic substrate unit mutually disjunct independent termination (also can be directly by each independently electrode slice serve as its independent termination).After this; allow the independent termination of each voltage-sensitive ceramic substrate unit protect an end of solder joint, elastic conduction metal to join with heat respectively; promptly form series arm (in each series arm, having the elastic conduction metal respectively) respectively with overtemperature protection structure; at last; the other end with the elastic conduction metal in above-mentioned each series arm links together again, thereby obtains another external connection end that is connected with external circuit of Surge Protector.
In the use of Surge Protector; voltage-sensitive ceramic substrate unit deterioration adstante febre in a certain series arm; the heat protection solder joint that links with it will melt and allow corresponding with it elastic conduction metal disconnect; corresponding being disconnected of series arm at this voltage-sensitive ceramic substrate unit place; the voltage-sensitive ceramic substrate unit of damaging quits work and no longer heating, avoids causing accident on fire.But because the series arm at other voltage-sensitive ceramic substrate unit place is not disconnected, Surge Protector still can work on, thereby can continue to implement surge protection to protection object.
Compared with the aforementioned existing similar products; chip varistor of the present utility model has substep invalidation functions (promptly can all not lose efficacy once); when using it in Surge Protector; under the situation of chip varistor local damage (being that some voltage-sensitive ceramic substrate unit is damaged); Surge Protector still possesses the surge protection function, the corresponding reliability that improves Surge Protector.In addition, compare,, thereby possess following advantage owing to the technical solution of the utility model is directly improved the internal structure of chip varistor with aforementioned mutually redundant Surge Protector scheme:
1., help reducing the overall cost of manufacture of Surge Protector product.Because the conductive coating that is positioned in the utility model product on each voltage-sensitive ceramic substrate unit one side is connected by common electrical pole piece (or claiming the common electrode sheet); compare with two even a plurality of (more than two) in type varistor finished product are set in Surge Protector simultaneously, the consumption of electrode slice will obviously reduce.With existing varistor finished product is reference, border measuring and calculating factually, and an electrode slice accounts for more than 5% in the cost of manufacture of existing varistor.Therefore, the minimizing of electrode slice quantity will reduce the overall cost of manufacture of Surge Protector greatly.In product of the present utility model, the quantity of voltage-sensitive ceramic substrate unit is many more, and the effect that this cost reduces is just big more.Certainly; even in the chip varistor product, only be provided with two voltage-sensitive ceramic substrate unit; it also can play the effect of two varistor finished products in above-mentioned Surge Protector with substep invalidation functions; in this case; two varistor finished products need be with four electrode slices; this product then only needs three electrode slices, and it still can't neglect the effect that reduces the overall product cost.
2., help improving production efficiency of products.Two schemes of having wrapped up in the chip varistor of sealing are installed in Surge Protector simultaneously compare with aforementioned; adopt after the technical solution of the utility model; can avoid insulate wrap up in seal repeat be provided with, the repetition that repeats a plurality of manufacturing process such as drawing of electrode slice termination; improved production efficiency, this also helps to reduce the manufacturing cost of product.
3., help reducing to have the volume of the Surge Protector of invalidation functions step by step.Since the technical solution of the utility model avoided insulation wrap up in seal repeat be provided with the electrode slice termination repeat draw; simplified product structure; correspondingly make that the shared space of chip varistor dwindles in the Surge Protector, and may for being provided with in Surge Protector that more protection branch roads that can lose efficacy step by step provide.
4., can allow Surge Protector that protection more reliably is provided.In product of the present utility model; the voltage-sensitive ceramic substrate unit can be for a plurality of; and simplifying product structure; avoided insulation to wrap up in the setting that repeats of seal; after the repeating of electrode slice termination drawn; even a plurality of (more than two) voltage-sensitive ceramic substrate unit is set in chip varistor simultaneously; can in Surge Protector, not take too much space yet; thereby more protection branch road can be set in Surge Protector; allow Surge Protector under the situation of a plurality of voltage-sensitive ceramic substrate unit successively deterioration; still can protect for protection object provides surge effectively, and then improve the reliability of surge protection widely.
Therefore; chip varistor of the present utility model has the advantages that can reduce the overall manufacturing cost of Surge Protector, enhance productivity; it can reduce to have the volume of the Surge Protector of invalidation functions step by step effectively, and is convenient to produce the Surge Protector that practicality is better, barrier propterty is stronger.
Content of the present utility model further illustrates with the following Examples, but content of the present utility model is not limited only to content related among the embodiment.
Description of drawings
Fig. 1 is the structural representation of chip varistor among the embodiment 1.
Fig. 2 is the A of Fig. 1---the A profile.
Fig. 3 is the structural representation of chip varistor among the embodiment 2.
Embodiment
Embodiment 1: shown in Fig. 1～2, chip varistor in the present embodiment has the voltage-sensitive ceramic substrate, conductive coating and electrode slice, it is characterized in that described voltage-sensitive ceramic substrate is made up of at least two separate voltage-sensitive ceramic substrate unit, in this example by three separate voltage-sensitive ceramic substrate unit 1,2,3 have formed the voltage-sensitive ceramic substrate, on two apparent surfaces of each voltage-sensitive ceramic substrate unit, be coated with conductive coating 4 respectively, conductive coating on each voltage-sensitive ceramic substrate unit one side is connected by a common electrical pole piece 5, is respectively arranged with independently electrode slice on the conductive coating of each voltage-sensitive ceramic substrate unit another side.In the present embodiment, has absolute electrode sheet 6,7,8 respectively on three separate voltage-sensitive ceramic substrate unit 1,2,3.
In addition, above-mentioned each the voltage-sensitive ceramic substrate unit 1,2,3 in the present embodiment is set up in parallel and forms a plate-like structure.
Embodiment 2: as shown in Figure 3, the chip varistor in the present embodiment is similar to embodiment 1, and its difference only is that each voltage-sensitive ceramic substrate unit 1,2,3 is superimposed successively.Separate in order to guarantee each voltage-sensitive ceramic substrate unit, under the situation of present embodiment, have the gap between the adjacent voltage-sensitive ceramic substrate unit.
With regard to the utility model, the voltage-sensitive ceramic substrate unit number among the foregoing description 1 and the embodiment 2 also can suitably increase or reduce, as is reduced to two or increase to four, five or the like.
Claims (3)
1, a kind of built-in chip varistor of Surge Protector with substep invalidation functions; have voltage-sensitive ceramic substrate, conductive coating and electrode slice; it is characterized in that described voltage-sensitive ceramic substrate is made up of at least two separate voltage-sensitive ceramic substrate unit; on two apparent surfaces of each voltage-sensitive ceramic substrate unit, be coated with conductive coating respectively; conductive coating on each voltage-sensitive ceramic substrate unit one side is connected by a common electrical pole piece, is respectively arranged with independently electrode slice on the conductive coating of each voltage-sensitive ceramic substrate unit another side.
2, chip varistor as claimed in claim 1 is characterized in that described each voltage-sensitive ceramic substrate unit is set up in parallel and forms a plate-like structure.
3, chip varistor as claimed in claim 1 is characterized in that described each voltage-sensitive ceramic substrate unit is superimposed successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420061842 CN2739773Y (en) | 2004-10-29 | 2004-10-29 | Built-in pressure-sensitive chip of surge protector with substrap failure function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420061842 CN2739773Y (en) | 2004-10-29 | 2004-10-29 | Built-in pressure-sensitive chip of surge protector with substrap failure function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2739773Y true CN2739773Y (en) | 2005-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420061842 Expired - Fee Related CN2739773Y (en) | 2004-10-29 | 2004-10-29 | Built-in pressure-sensitive chip of surge protector with substrap failure function |
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| Country | Link |
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| CN (1) | CN2739773Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105679476A (en) * | 2014-11-05 | 2016-06-15 | 胜德国际研发股份有限公司 | Voltage dependent resistor |
-
2004
- 2004-10-29 CN CN 200420061842 patent/CN2739773Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105679476A (en) * | 2014-11-05 | 2016-06-15 | 胜德国际研发股份有限公司 | Voltage dependent resistor |
| CN105679476B (en) * | 2014-11-05 | 2018-10-19 | 胜德国际研发股份有限公司 | Voltage dependent resistor |
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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: 20051109 Termination date: 20121029 |