CN202839182U - Plug-in type over-current protection element - Google Patents
Plug-in type over-current protection element Download PDFInfo
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- CN202839182U CN202839182U CN 201220511859 CN201220511859U CN202839182U CN 202839182 U CN202839182 U CN 202839182U CN 201220511859 CN201220511859 CN 201220511859 CN 201220511859 U CN201220511859 U CN 201220511859U CN 202839182 U CN202839182 U CN 202839182U
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- plug
- electrode
- conductive layer
- metal forming
- ptc
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Abstract
The utility model discloses a plug-in type over-current protection element which comprises a resistor element, a first metal stripe plug-in and a second metal stripe plug-in. The resistor element is provided with an upper surface and a lower surface, and comprises at least two PTC (Positive Temperature Coefficient) elements, a first electrode and a second electrode. Each PTC element comprises a first conductive layer, a second conductive layer and a PTC material layer superposed between the first conductive layer and the second conductive layer. The PTC elements are stacked up and down and connected electrically. The first electrode comprises a pair of first metal foils formed on the upper and lower surfaces of the first electrode. The first metal foils are electrically connected with the first conductive layer and electrically separated from the second conductive layer. The second electrode comprises a pair of second metal foils formed on the upper and lower surfaces of the second electrode. The second electrode is electrically connected with the second conductive layer and electrically separated from the first conductive layer. One end of the first metal stripe plug-in is connected with the first electrode while the other end of the first metal stripe plug-in extends out of the resistor element in a first direction. One end of the second metal stripe plug-in is connected with the second electrode while the other end of the second metal stripe plug-in extends out of the resistor element in a second direction.
Description
Technical field
The utility model is about a kind of over-current protecting element, particularly has a positive temperature coefficient (Positive Temperature Coefficient about a kind of; PTC) over-current protecting element of characteristic.
Background technology
The resistance value of existing PTC element is worked as sharp to the reacting phase of variations in temperature.When PTC element during in normal behaviour in service, its resistance can be kept utmost point low value and make circuit be able to normal operation.But when making temperature rise to a critical temperature when the phenomenon that overcurrent or mistake high temperature occur; its resistance value can oppositely be offseted excessive electric current to a high resistance state (for example more than 102 Ω) in the moment spring, to reach the purpose of protection battery or circuit element.Because the PTC element can protect electronic product effectively, so this PTC element seen and has been integrated in the various circuit element, to prevent the infringement of overcurrent.
Generally speaking, but over-current protecting element is all expected its initial resistivity value of reduce (initial resistance), in order to be applicable to low-resistance occasion.US Patent No. 7,283,033 disclose the electrode tip (lead) that utilizes bifurcated, plural PTC element in parallel (wafer), to reach the effect that reduces resistance value, wherein the PTC element is stacked at sandwich structure between two conductive layers with a ptc layer.
Yet US 7,283, and 033 electrode divergent ends and the interelement marriage relation of PTC are comparatively complicated, and if and a di-above PTC element will because of stacking relation, can increase the thickness of element integral body.Moreover US 7,283, and 033 mainly is the over-current protecting element design of axle type (axial type), if will be applied to the over-current protecting element of plug-in type (radial type), still need carry out certain structural adjustment, and can't directly be applied.
The utility model content
The purpose of this utility model is to provide a low-resistance plug-in type over-current protecting element, in the hope of significantly increasing its application.In addition, over-current protecting element of the present utility model also is unlikely and significantly increases its volume and thickness, and is suitable for the application of miniaturization electronic product.
According to the plug-in type over-current protecting element of the utility model one embodiment, it comprises: resistive element, the first metal strip plug-in unit and the second metal strip plug-in unit.Resistive element has upper surface, lower surface, and it comprises: at least two PTC elements, the first electrode and the second electrode.Each PTC element comprise the first conductive layer, the second conductive layer and be stacked at the first conductive layer and the second conductive layer between ptc layer.This at least two PTC element is tied to form stacked on top, and electric parallel connection.The first electrode comprises a pair of the first metal forming that is formed at this upper surface and lower surface, and this first electrode is electrically connected the first conductive layer, and and the second conductive layer electrical isolation.The second electrode comprises a pair of the second metal forming that is formed at this upper surface and lower surface, and this second electrode is electrically connected the second conductive layer, and and the first conductive layer electrical isolation.One end of the first metal strip plug-in unit connects this first electrode, and this resistive element of protrusion is extended along first direction in the other end.One end of the second metal strip plug-in unit connects this second electrode, and this resistive element of protrusion is extended along this first direction in the other end.
Among one embodiment, the end that the first metal strip plug-in unit connects this first electrode comprises the bifurcated end, connects respectively the first metal forming of upper surface and lower surface.The end that the second metal strip plug-in unit connects the second electrode comprises the bifurcated end, connects respectively the second metal forming of upper surface and lower surface.
Among one embodiment, an end of the first metal strip plug-in unit connects the first metal forming that is positioned at upper surface or lower surface, and an end of this second metal strip plug-in unit connects the second metal forming that is positioned at this upper surface or lower surface.
Among one embodiment, adjacent PTC element is with insulator separation.
Among one embodiment, be positioned at the PTC element of the top and be positioned at the first metal forming of upper surface and the second metal forming between be provided with an insulating barrier.Be positioned at the PTC element of below and be positioned at the first metal forming of lower surface and the second metal forming between be provided with another insulating barrier.
Among one embodiment, be positioned between the first metal forming of upper surface or lower surface and the second metal forming and be provided with welding resisting layer.
Among one embodiment, this resistive element comprises in addition: the first conducting connecting part and the second conducting connecting part.The first conducting connecting part connects the first electrode and the first conductive layer, and the second conducting connecting part connects the second electrode and the second conductive layer.The first conducting connecting part or the second conducting connecting part can be conductive through hole or conduction end face, or the structure of other tool conductive characteristics.
Plug-in type over-current protecting element of the present utility model is PTC element in parallel in resistive element directly, can effectively avoid the increase of thickness, and effectively reduces the resistance value of over-current protecting element integral body.
Description of drawings
Fig. 1 is the plug-in type over-current protecting element schematic diagram of the utility model the first embodiment;
Fig. 2 is the plug-in type over-current protecting element schematic diagram of the utility model the second embodiment;
Fig. 3 is the resistive element structural representation of the plug-in type over-current protecting element of the utility model one embodiment; And
Fig. 4 is the resistive element structural representation of the plug-in type over-current protecting element of another embodiment of the utility model.
Wherein, description of reference numerals is as follows:
10,30 plug-in type over-current protecting elements;
11 first metal strip plug-in units;
12 second metal strip plug-in units;
20 resistive elements;
The 21PTC element;
22 first electrodes;
23 second electrodes;
24,25,26 insulating barriers;
27 welding resisting layers;
28 first conducting connecting parts;
29 second conducting connecting parts;
38 first conducting connecting parts;
39 second conducting connecting parts;
111,112,121,122 ends;
113,123 divergent ends;
The 211PTC material layer;
212 first conductive layers;
213 second conductive layers;
221 first metal formings;
231 second metal formings.
Embodiment
For above and other technology contents of the present utility model, feature and advantage can be become apparent, cited below particularlyly go out related embodiment, and cooperate appended graphicly, be described in detail below:
Fig. 1 shows the stereogram of the plug-in type over-current protecting element of the utility model the first embodiment.A kind of plug-in type over-current protecting element 10 comprises resistive element 20, the first metal strip plug-in unit 11 and the second metal strip plug-in unit 12.Resistive element 20 comprises the PTC element of at least two parallel connections basically, to reduce its resistance value.
Fig. 3 shows the first embodiment schematic diagram of resistive element 20.Resistive element 20 has upper surface, lower surface, and it comprises: two PTC elements 21, the first electrode 22, the second electrode 23, the first conducting connecting part 28 and the second conducting connecting parts 29.Each PTC element 21 comprises the first conductive layer 212, the second conductive layer 213 and is stacked at the first conductive layer 212 and the ptc layer 211 of 213 of the second conductive layers.The first electrode 22 comprises a pair of the first metal forming 221 that is formed at this upper surface and lower surface, this first electrode 22 electrical connections first conductive layer 212, and and the second conductive layer 213 electrical isolation.The second electrode 23 comprises a pair of the second metal forming 231 that is formed at this upper surface and lower surface, this second electrode 23 electrical connections second conductive layer 213, and and the first conductive layer 212 electrical isolation.21 of neighbouring PTC elements are with insulating barrier 24 isolation.The PTC element 21 of the superiors and the first metal forming 221 and 231 of the second metal formings that are positioned at upper surface are provided with insulating barrier 25.Undermost PTC element 21 and the first metal forming 221 and 231 of the second metal formings that are positioned at lower surface are provided with another insulating barrier 26.The first metal forming 221 and 231 of the second metal formings that are positioned at upper surface or lower surface are provided with welding resisting layer 27.
The first conducting connecting part 28 connects for example two the first metal formings 221 of the first electrode 22() and the first conductive layer 212.The second conducting connecting part 29 connects for example two the second metal formings 231 of the second electrode 23() and the second conductive layer 213.The first conducting connecting part 28 or the second conducting connecting part 29 can utilize plating mode formation semicircle conductive through hole as shown in Figure 3.In addition, this conducting connecting part 28 or 29 also can be the wholecircle conductive through hole, is positioned at the 1/4 circle conductive through hole in four corners etc.
Fig. 4 shows the second embodiment schematic diagram of resistive element 20.Be similar to the structure of the first embodiment shown in Figure 3, difference is in and changes by the conduction end face alternative in conducting connecting part.Conducting connecting part 38 or 39 among Fig. 4 is full side (full face) conduction end faces.In addition, it also can be part side conduction end face.
In the practical application, conducting connecting part can have many different variation patterns, as long as conducting connecting part has the first conductive layer 212 of electrical connection the first electrode 22 and each PTC element 21, or connect the second conductive layer 213 functions of the second electrode 23 and each PTC element 21, should be the utility model and contain.
Comprehensive speech, the resistive element 20 of above-described embodiment is essentially rectangular structure, 21 one-tenth stacked on top of two PTC elements, and electric parallel connection.In detail, resistive element 20 is sequentially from bottom to top for comprising the stepped construction of electrode layer (the first metal forming 221 and the second metal forming 231 that comprise lower surface), insulating barrier 26, PTC element 21, insulating barrier 24, another PTC element 21, insulating barrier 25 and electrode layer (the first metal forming 221 and the second metal forming 231 that comprise upper surface).
Join Fig. 1, an end 111 of the first metal strip plug-in unit 11 connects this first electrode 22 again, and this resistive element 20 of protrusion is extended along first direction in the other end 112.One end 121 of the second metal strip plug-in unit 12 connects this second electrode 23, and this resistive element 20 of protrusion is extended along this first direction in the other end 122.Profess it, extend in the same direction the extension end 122 of the extension end 112 of the first metal strip plug-in unit 11 and the second metal strip plug-in unit 12, and each other in parastate.
In the present embodiment, the end 111 that the first metal strip plug-in unit 11 connects this first electrode 22 comprises bifurcated end 113, respectively the first metal forming 221 of contact resistance element 20 upper surfaces and lower surface.Divergent ends 113 bending is connected in end 112, so divergent ends 113 and end 112 are positioned at Different Plane.The end 121 that the second metal strip plug-in unit 12 connects the second electrode 23 comprises bifurcated end 123, respectively the second metal forming 231 of contact resistance element 20 upper surfaces and lower surface.Divergent ends 123 bending is connected in end 122, so divergent ends 123 and end 122 are positioned at Different Plane.
Fig. 2 shows the stereogram of the plug-in type over-current protecting element of the utility model the second embodiment.Plug-in type over-current protecting element 30 can comprise the resistive element 20 shown in Fig. 3 or 4 equally, and an end 111 of the first metal strip plug-in unit 11 connects the first metal forming 221 that is positioned at resistive element 20 upper surfaces, the other end 112 extension protrusion resistive elements 20.One end 121 of the second metal strip plug-in unit 12 connects the second metal forming 231 that is positioned at resistive element 20 upper surfaces, and protrusion resistive element 20 is extended in the other end 122.Extend in the same direction the end 112 of the first metal strip plug-in unit 11 and the end 122 of the second metal strip plug-in unit 12, and each other in parastate.The first metal strip plug-in unit 11 and/or the second metal strip plug-in unit 12 also can be connected to the first metal forming 221 and second metal forming 231 of resistive element 20 lower surfaces.
Among one embodiment, resistive element 20 is the coated insulation outer cover in addition, and for example the plastic cement cover extends end 112 and 122 and expose.Extend end 112 and 122 and can design corresponding splicing ear, be assembled in electric device to carry out overcurrent protection to utilize card format.
On the practice, can design in the resistive element 20 and comprise the more PTC element 21 of multi-parallel, so plug-in type over-current protecting element 10,30 can obtain lower resistance value by this, and be contained by the utility model.But with regard to considering of simplified structure and processing procedure, generally with and the over-current protecting element of di-to four a PTC element the most widely use.
Plug-in type over-current protecting element of the present utility model directly uses the resistive element that comprises PTC element in parallel, therefore need not stacking PTC element and cause the increase of thickness.In addition, simplicity of design of the present utility model connects this resistive element by simple metal insert, can form the plug-in type over-current protecting element of tool low resistance characteristic of the present utility model.
Technology contents of the present utility model and technical characterstic disclose as above, yet the technology personage that this area has common knowledge still may be based on teaching of the present utility model and announcement and done all replacement and modifications that does not deviate from the utility model spirit.Therefore, protection range of the present utility model should be not limited to those disclosed embodiments, and should comprise various do not deviate from replacement of the present utility model and modifications, and is contained by applying for a patent the claim scope.
Claims (8)
1. a plug-in type over-current protecting element is characterized in that, comprises:
One resistive element has upper surface, lower surface, and it comprises:
At least two PTC elements, each PTC element comprise the first conductive layer, the second conductive layer and be stacked at the first conductive layer and the second conductive layer between ptc layer, this at least two PTC element becomes stacked on top, and electric parallel connection;
One first electrode comprises a pair of the first metal forming that is formed at this upper surface and lower surface, and this first electrode is electrically connected the first conductive layer, and and the second conductive layer electrical isolation; And
One second electrode comprises a pair of the second metal forming that is formed at this upper surface and lower surface, and this second electrode is electrically connected the second conductive layer, and and the first conductive layer electrical isolation;
One first metal strip plug-in unit, an end connect this first electrode, and this resistive element of protrusion is extended along first direction in the other end; And
One second metal strip plug-in unit, an end connect this second electrode, and this resistive element of protrusion is extended along this first direction in the other end.
2. according to claim 1 plug-in type over-current protecting element; it is characterized in that; the end that this first metal strip plug-in unit connects this first electrode comprises the bifurcated end; connect respectively the first metal forming that is positioned at upper surface and lower surface; the end that this second metal strip plug-in unit connects the second electrode comprises the bifurcated end, connects respectively the second metal forming that is positioned at upper surface and lower surface.
3. according to claim 1 plug-in type over-current protecting element; it is characterized in that; the end that this first metal strip plug-in unit connects this first electrode connects the first metal forming that is positioned at upper surface or lower surface, and the end that this second metal strip plug-in unit connects this second electrode connects the second metal forming that is positioned at this upper surface or lower surface.
4. according to claim 1 plug-in type over-current protecting element is characterized in that this adjacent PTC element is with insulator separation.
5. according to claim 1 plug-in type over-current protecting element; it is characterized in that; be positioned at the person of the superiors in this at least two PTC element and be positioned at the first metal forming of upper surface and the second metal forming between be provided with an insulating barrier, the person that is positioned in the orlop in this at least two PTC element and be positioned at the first metal forming of lower surface and the second metal forming between be provided with another insulating barrier.
6. according to claim 1 plug-in type over-current protecting element is characterized in that, is positioned between the first metal forming of upper surface or lower surface and the second metal forming to be provided with welding resisting layer.
7. according to claim 1 plug-in type over-current protecting element is characterized in that this resistive element comprises in addition:
The first conducting connecting part is used for connecting the first electrode and the first conductive layer; And
The second conducting connecting part is used for connecting the second electrode and the second conductive layer.
8. according to claim 7 plug-in type over-current protecting element is characterized in that, this first conducting connecting part or the second conducting connecting part are conductive through hole or conduction end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220511859 CN202839182U (en) | 2012-10-08 | 2012-10-08 | Plug-in type over-current protection element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220511859 CN202839182U (en) | 2012-10-08 | 2012-10-08 | Plug-in type over-current protection element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202839182U true CN202839182U (en) | 2013-03-27 |
Family
ID=47950826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220511859 Expired - Fee Related CN202839182U (en) | 2012-10-08 | 2012-10-08 | Plug-in type over-current protection element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202839182U (en) |
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2012
- 2012-10-08 CN CN 201220511859 patent/CN202839182U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20201008 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |