CN202957088U - Varistor - Google Patents
Varistor Download PDFInfo
- Publication number
- CN202957088U CN202957088U CN 201220643348 CN201220643348U CN202957088U CN 202957088 U CN202957088 U CN 202957088U CN 201220643348 CN201220643348 CN 201220643348 CN 201220643348 U CN201220643348 U CN 201220643348U CN 202957088 U CN202957088 U CN 202957088U
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- varistor
- weld part
- lead
- electrode slice
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Abstract
The utility model relates to a varistor. The varistor comprises a chip, a positive electrode sheet, a negative electrode sheet and two outgoing wires, wherein the positive electrode sheet and the negative electrode sheet are respectively arranged on two side surfaces of the chip; and the welding parts of the two outgoing wires are respectively welded on the surface of one of the electrode sheets. The varistor is characterized in that the welding part has a bending shape. The length of the welding part is increased by designing the welding part to be of the bending shape, so that the contact area between the outgoing wires and the electrode sheets is increased, and the current density between the outgoing wires and the electrode sheets is reduced. Accordingly, the varistor provided by the utility model can endure large current impulse instantaneously, and the safety performance of the varistor is improved.
Description
Technical field
The utility model relates to a kind of electronic component, relates in particular to a kind of varistor.
Background technology
As depicted in figs. 1 and 2, varistor generally comprises chip 01, positive and negative two electrode slices 02 and two lead-out wires 03, positive and negative two electrode slices 02 are separately positioned on the two sides of chip 01, and the weld part 04 of two lead-out wires 03 is welded on respectively on the surface of one of them electrode slice 02.Chip 01 in above-mentioned is generally MOV(metal oxide, for example ZnO) chip, the electrode slice 02 in above-mentioned can be copper electrode, can be also silver electrode.
As shown in Figure 1, at present the weld part 04(lead-out wire 03 and the contacted part of electrode slice 02 of lead-out wire 03) equal shapes linearly, the length of weld part 04 depends on the diameter of electrode slice 02, be that lead-out wire 03 is limited by the diameter of electrode slice 02 with the contact area of electrode slice 02, because the diameter of electrode slice 02 is generally all less, therefore, contact area between lead-out wire 03 and electrode slice 02 is also less, when piezo-resistance moment during by larger electric current, larger by the current density between lead-out wire 03 and electrode slice 02, solder joint 05 easily comes off, and security performance is lower.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of varistor, and this varistor can reduce the current density between lead-out wire and electrode, improves security performance.The technical scheme adopted is as follows:
A kind of varistor, comprise chip, positive and negative two electrode slices and two lead-out wires, positive and negative two electrode slices are separately positioned on the two sides of chip, and the weld part of two lead-out wires is welded on respectively on the surface of one of them electrode slice, it is characterized in that: described weld part is crooked shape.
Weld part is set to crooked shape, increased the length of weld part, be the length that has increased lead-out wire and electrode slice surface contact portion, thereby increased the contact area of lead-out wire and electrode slice, reduced by the current density between lead-out wire and electrode slice, can stand larger rush of current in moment, the solder joint difficult drop-off, improved the security performance of this varistor.
As preferred version of the present utility model, described weld part is S shape.Weld part is set to S shape, on the basis of the difficulty that reduces weld part making, welding, increases the length of weld part as far as possible, increases the contact area between lead-out wire and electrode slice.
As the further preferred version of the utility model, the base of the cross section of described weld part is straight line.The base of the cross section of weld part is straight line, be that weld part is flat, its bottom surface contacted with electrode slice is plane, and weld part is the face contact with contacting of electrode slice, and one side makes the solder joint after welding connect more abundant, on the other hand, due to face contact, further increase the contact area of weld part and electrode slice on constant basis in length, when moment is passed through larger electric current, the solder joint difficult drop-off, further improve the security performance of this varistor.
The utility model compared with prior art, has following advantage:
Weld part is set to crooked shape, increased the length of weld part, thereby increased the contact area of lead-out wire and electrode slice, reduced by the current density between lead-out wire and electrode slice, can stand larger rush of current in moment, improve the security performance of this varistor.
The accompanying drawing explanation
Fig. 1 is the structural representation of piezo-resistance in prior art;
Fig. 2 is the profile of Fig. 1 along A-A;
Fig. 3 is the structural representation of the utility model preferred implementation;
Fig. 4 is the profile of Fig. 3 along B-B.
Embodiment
Below in conjunction with accompanying drawing and preferred implementation of the present utility model, be described further.
As shown in Figure 3, this varistor, comprise chip 1, positive and negative two electrode slices 2 and two lead-out wires 3; Positive and negative two electrode slices 2 are separately positioned on the two sides of chip 1; Article two, the weld part 4 of lead-out wire 3 is welded on respectively on the surface of one of them electrode slice 2, and weld part 4 is S shape, and as shown in Figure 4, the base of the cross section of weld part 4 is straight line 5.
In addition; it should be noted that, the specific embodiment described in this specification, its each several part titles etc. can be different; allly according to the utility model patent, conceive equivalence or the simple change that described structure, feature and principle are done, be included in the protection range of the utility model patent.The utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment; only otherwise depart from structure of the present utility model or surmount this scope as defined in the claims, all should belong to protection range of the present utility model.
Claims (3)
1. a varistor, comprise chip, positive and negative two electrode slices and two lead-out wires, positive and negative two electrode slices are separately positioned on the two sides of chip, and the weld part of two lead-out wires is welded on respectively on the surface of one of them electrode slice, it is characterized in that: described weld part is crooked shape.
2. varistor as claimed in claim 1, it is characterized in that: described weld part is S shape.
3. varistor as claimed in claim 1 or 2, it is characterized in that: the base of the cross section of described weld part is straight line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220643348 CN202957088U (en) | 2012-11-29 | 2012-11-29 | Varistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220643348 CN202957088U (en) | 2012-11-29 | 2012-11-29 | Varistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202957088U true CN202957088U (en) | 2013-05-29 |
Family
ID=48462648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220643348 Ceased CN202957088U (en) | 2012-11-29 | 2012-11-29 | Varistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202957088U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105118670A (en) * | 2015-08-31 | 2015-12-02 | 苏州斯尔特微电子有限公司 | Ceramic capacitor |
| CN105139983A (en) * | 2015-07-31 | 2015-12-09 | 成都铁达电子有限责任公司 | Piezoresistor and lead thereof |
-
2012
- 2012-11-29 CN CN 201220643348 patent/CN202957088U/en not_active Ceased
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105139983A (en) * | 2015-07-31 | 2015-12-09 | 成都铁达电子有限责任公司 | Piezoresistor and lead thereof |
| CN105139983B (en) * | 2015-07-31 | 2019-08-16 | 成都铁达电子股份有限公司 | Piezoresistor and its lead |
| CN105118670A (en) * | 2015-08-31 | 2015-12-02 | 苏州斯尔特微电子有限公司 | Ceramic capacitor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| IW01 | Full invalidation of patent right |
Decision date of declaring invalidation: 20180301 Decision number of declaring invalidation: 35051 Granted publication date: 20130529 |
|
| IW01 | Full invalidation of patent right |