CN205900218U - Plug -in components type PPTC - Google Patents
Plug -in components type PPTC Download PDFInfo
- Publication number
- CN205900218U CN205900218U CN201620849244.1U CN201620849244U CN205900218U CN 205900218 U CN205900218 U CN 205900218U CN 201620849244 U CN201620849244 U CN 201620849244U CN 205900218 U CN205900218 U CN 205900218U
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- plug
- pptc
- layer
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- type pptc
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Abstract
The utility model provides a plug -in components type PPTC, belongs to the electronic component field, includes just two the same sheetmetals to setting up, accompanies the PPTC core between two sheetmetals, and two outer claddings of sheetmetals have the insulating layer, and the insulating layer hinders electricity layer and two sheetmetals and contacts including being used for stopping electric layer of hindering of current conveyance, insulating layer and fire -retardant layer, and the insulating layer lies in and hinders between electric layer and the fire -retardant layer for plug -in components type PPTC insulating properties is good, difficult burning, better protection circuit.
Description
Technical field
The utility model is related to field of electrical components, particularly to a kind of plug-in type pptc.
Background technology
Plug-in type pptc is very important a kind of overflow protecting element in current circuit protection.Plug-in type pptc can fit
In Security Unit for various communication lines and power electronic equipment integrated circuit.Do when section communication circuit is subjected to thunder and lightning
Disturb or during with electric power linear contact lay, or when various connector port suffers from short-circuit current, the resistance of plug-in type pptc can be fast
Speed increases, and makes circuit assume high resistant (disconnection) state, loop current amplitude reduces, and protects rear end equipment.Work as overcurrent
After elimination, plug-in type pptc recovers normal automatically, reusable.So, it is communication device configured circuit protecting element plug-in unit
Type pptc, for the interference overvoltage preventing communication line, reduces equipment failure rate and is very important.
When there is protective effect, due to hundreds and thousands of times of the increase of its resistance, therefore it protects plug-in type pptc
During effect, often bear the voltage of the overwhelming majority in circuit.Now plug-in type pptc is easily breakdown, and electric discharge easily causes fire
Calamity.
Utility model content
The purpose of this utility model is to provide a kind of plug-in type pptc, nonflammable, being capable of more preferable protection circuit.
Above-mentioned purpose of the present utility model has the technical scheme that a kind of plug-in type pptc, including
Two pieces of identical sheet metals just to setting, accompany pptc core, two pieces of sheet metals are externally provided with for wrapping between two pieces of sheet metals
Cover the insulating barrier of sheet metal and pptc core, sheet metal is connected with the electrode for connection circuit, electrode one end connects metal
Piece, the other end stretches out insulating barrier, and insulating barrier includes, for stopping resistance electric layer, thermal insulation layer and the flame-retardant layer that electric current passes through, hindering electric layer
Contact with two pieces of sheet metals, thermal insulation layer is located between resistance electric layer and flame-retardant layer.
By adopting technique scheme, when plug-in type pptc shields, pptc core resistance value become big so that
Two metal sheets define the structure of similar electric capacity, if the voltage now between two metal sheets is excessive when there is disruptive discharge, by
In resistance electric layer good insulation preformance, even if electric current also will not cannot be destroyed by hindering electric layer so that plug-in type pptc is internal breakdown
Other electric elements in circuit, improve the insulating properties of plug-in type pptc；When pptc core shields, its resistance
Value is rapid to be become greatly so that the temperature of pptc core uprises rapidly, the area of the vicinity to plug-in type pptc place electric furnace for the hyperthermia radiation
So that other electric elements are impacted and be susceptible to large-area damage, the thermal insulation layer in this programme makes plug-in type in domain
High temperature within pptc is difficult to be delivered to the external world, more preferable protection circuit；When plug-in type pptc shields so that itself is warm
When degree raises, easy spontaneous combustion, fire, the flame-retardant layer in this programme can more preferable protection circuit, prevent plug-in type
Pptc burns.
Preferably, resistance electric layer is made up of epoxy plastics.
By adopting technique scheme, epoxy plastics is insulator and is thermosetting plastics, can internally temperature liter
Good insulating properties, more preferable protection circuit is kept in the case of height.
Preferably, thermal insulation layer is made up of polyurethane foam.
By adopting technique scheme, polyurethane foam thermal conductivity factor low so that the heat within plug-in type pptc not
Easily it is dispersed into the external world, other electric elements in more preferable protection circuit, and polyurethane foam has certain anti-flammability, permissible
Prevent temperature too high and fire occurs.
Preferably, flame-retardant layer is made up of brominated Polystyrene.
By adopting technique scheme, brominated Polystyrene has fire resistance so that plug-in type pptc is internal in time
Burn because of high temperature and be also not diffuse into outside plug-in type pptc, more preferable protection circuit.
Preferably, outside flame-retardant layer relative to both sides be provided with for people crawl slipmat.
By adopting technique scheme, when installing plug-in type pptc, due to needing plug-in type pptc first to level
Put, then welded again, because plug-in type pptc shape is less, be difficult to capture, and smooth surface, it is susceptible to come off now
As affecting welding efficiency, the slipmat in this programme, making one can be more easily by pptc pair when welding plug-in type pptc
Level is put and is welded, and improves installation effectiveness.
Preferably, slipmat is made up of rubber.
By adopting technique scheme, rubber soft texture and there is good insulating properties, so that staff is being connect
Good hand touch during tactile slipmat, will not injure hand in the flow work of high intensity, and further enhancing insulating barrier
Insulating properties are so that plug-in type pptc can more preferable protection circuit.
Preferably, slipmat surface is provided with some projections.
By adopting technique scheme, some projections make slipmat surface irregularity, increased the anti-of slipmat
Slip energy.
Preferably, raised is cylinder, and cylinder-shaped top is provided with dome.
By adopting technique scheme, dome makes human hand feel in contact plug-in type pptc more preferable.
Preferably, raised is in crossing distribution on slipmat surface.
By adopting technique scheme, further such that more comfortable when human hand is contacted with plug-in type pptc, and
And be more favorable for persistently working.
Preferably, projection is uniformly covered with slipmat surface.
By adopting technique scheme, further such that more comfortable when human hand is contacted with plug-in type pptc, and
And be more favorable for persistently working.
Brief description
Fig. 1 is the schematic diagram representing raised distribution situation in embodiment two；
Fig. 2 is the Longitudinal cross section schematic of indication plug unit type pptc internal structure in embodiment one；
Fig. 3 is the schematic diagram representing insulation layer structure in embodiment two；
Fig. 4 is embodiment one schematic diagram；
Fig. 5 is embodiment three schematic diagram；
Reference: 1, sheet metal；2nd, pptc core；3rd, insulating barrier；301st, hinder electric layer；302nd, thermal insulation layer；303rd, fire-retardant
Layer；4th, electrode；5th, slipmat；6th, raised；7th, dome.
Specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Embodiment one:
In conjunction with Fig. 2 and Fig. 4, a kind of plug-in type pptc, including the pptc core being clipped between the two metal sheets 1 being oppositely arranged
2, sheet metal 1 is wrapped up by insulating barrier 3 with pptc core 2.Electrode 4 is connected with sheet metal 1, and one end of electrode 4 is stretched out
Insulating barrier 3.
Wherein, insulating barrier 3 includes hindering electric layer 301, thermal insulation layer 302 and flame-retardant layer 303.Resistance electric layer 301 is by epoxy plastics system
Become and fit with sheet metal 1, thermal insulation layer 302 is made up of polyurethane foam and is clipped between resistance electric layer 301 and flame-retardant layer 303,
Flame-retardant layer 303 is made up of brominated Polystyrene.
When plug-in type pptc shields: the resistance value of pptc core 2 becomes greatly so that two metal sheets 1 define class
Like the structure of electric capacity, if the voltage now between two metal sheets 1 is excessive when there is disruptive discharge, because resistance electric layer 301 insulate
Performance is good, even if electric current also will not cannot be destroyed in circuit by hindering electric layer 301 so that plug-in type pptc is internal breakdown
Other electric elements.Now, the temperature of pptc core 2 uprises rapidly, and thermal insulation layer 302 makes high temperature within plug-in type pptc not
Easily it is delivered to the external world, more preferable protection circuit；In hot environment, plug-in type pptc is susceptible to burn, fire, resistance
Combustion layer 303 can more preferable protection circuit, prevent plug-in type pptc from burning.
Embodiment two:
In conjunction with Fig. 1 and Fig. 3, the difference with embodiment one is to be respectively equipped with slipmat 5 on the relative side of insulating barrier 3,
Have some raised 6 in crossing distribution in slipmat 5.For cylinder and one end is provided with dome 7 to projection 6.
Embodiment three:
As shown in figure 5, the projection 6 being in this programme with the difference of embodiment one is uniformly covered with the surface of slipmat 5.
This specific embodiment is only that it is not to restriction of the present utility model, ability to explanation of the present utility model
Field technique personnel can make to the present embodiment after reading this specification as needed does not have the modification of creative contribution, but
As long as all being protected by Patent Law in right of the present utility model.
Claims (10)
1. a kind of plug-in type pptc, including two pieces of identical sheet metals (1) just to setting, between two pieces of described sheet metals (1)
Accompany pptc core (2), two pieces of described sheet metals (1) are externally provided with for coating the exhausted of described sheet metal (1) and pptc core (2)
Edge layer (3), described sheet metal (1) is connected with the electrode (4) for connection circuit, and described electrode (4) one end connects described gold
Belong to piece (1), the other end stretches out described insulating barrier (3), it is characterized in that: described insulating barrier (3) is included for stopping what electric current passed through
Resistance electric layer (301), thermal insulation layer (302) and flame-retardant layer (303), described resistance electric layer (301) is connected with two pieces of described sheet metals (1)
Touch, described thermal insulation layer (302) is located between described resistance electric layer (301) and described flame-retardant layer (303).
2. plug-in type pptc according to claim 1, is characterized in that: described resistance electric layer (301) is made up of epoxy plastics.
3. plug-in type pptc according to claim 2, is characterized in that: described thermal insulation layer (302) is made up of polyurethane foam.
4. plug-in type pptc according to claim 3, is characterized in that: described flame-retardant layer (303) is by brominated Polystyrene system
Become.
5. plug-in type pptc according to claim 1, is characterized in that: described flame-retardant layer (303) outward relative to both sides be provided with
Slipmat (5) for people's crawl.
6. plug-in type pptc according to claim 5, is characterized in that: described slipmat (5) is made up of rubber.
7. plug-in type pptc according to claim 6, is characterized in that: described slipmat (5) surface is provided with some projections
(6).
8. plug-in type pptc according to claim 7, is characterized in that: described projection (6) is cylinder, and cylinder-shaped top
It is provided with dome (7).
9. plug-in type pptc according to claim 8, is characterized in that: described projection (6) is in crossing distribution described anti-
Skidding (5) surface.
10. plug-in type pptc according to claim 8, is characterized in that: described projection (6) is uniformly covered with described slipmat
(5) surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620849244.1U CN205900218U (en) | 2016-08-05 | 2016-08-05 | Plug -in components type PPTC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620849244.1U CN205900218U (en) | 2016-08-05 | 2016-08-05 | Plug -in components type PPTC |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205900218U true CN205900218U (en) | 2017-01-18 |
Family
ID=57783313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620849244.1U Expired - Fee Related CN205900218U (en) | 2016-08-05 | 2016-08-05 | Plug -in components type PPTC |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205900218U (en) |
-
2016
- 2016-08-05 CN CN201620849244.1U patent/CN205900218U/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: 20170118 Termination date: 20190805 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |