CN208157176U - Thermal protection type varistor - Google Patents
Thermal protection type varistor Download PDFInfo
- Publication number
- CN208157176U CN208157176U CN201820723412.1U CN201820723412U CN208157176U CN 208157176 U CN208157176 U CN 208157176U CN 201820723412 U CN201820723412 U CN 201820723412U CN 208157176 U CN208157176 U CN 208157176U
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- elongated slot
- varistor
- insulating trip
- pin
- fuse
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Abstract
The utility model relates to a kind of Thermal protection type varistors, including varistor ontology, the insulating trip being arranged on varistor ontology and the epoxy resin enclosed layer for encapsulating varistor ontology and insulating trip；The first elongated slot and the second elongated slot are provided on the insulating trip；The depth of first elongated slot and the consistency of thickness of insulating trip；The length direction of the length direction and the first elongated slot of second elongated slot is vertically arranged；The downward depth of second elongated slot depth downward less than the first elongated slot；Second elongated slot is opened up along the maximum gauge of insulating trip；Second pin fixing groove is additionally provided on the insulating trip.The utility model increases the permeability of hot melt adhesive, also increases the contact area of fuse solder joint Yu varistor galactic pole, to improve the disconnection response efficiency of thermo-fuse；Also increase blocking distance when hot melt；And the connection reliability between thermo-fuse and pin is good, being capable of process simplification in mass production.
Description
Technical field
The utility model relates to a kind of electronic component, especially a kind of Thermal protection type varistor.
Background technique
Piezoresistor is widely used in the overvoltage of route, equipment and element with its superior nonlinear wind vibration
Protection and surge absorbing element；When various types of instantaneous overvoltages frequently occur, then piezoresistor will frequent movement
Overvoltage amplification and absorption release surge energy is inhibited if things go on like this certainly will then to will lead to pressure to protect electrical equipment and element
The performance of sensitive resistor deteriorates or even failure；In addition, varistor can rapid office when varistor receives duration overvoltage
Portion's breakdown leads to catching fire phenomenon.Therefore, piezoresistive element is needed with heat protection function.
The varistor with heat protection function of the prior art is typically provided an attaching close to the heat of piezoresistive element
Fuse is lower than the principle of remaining component using the fusing point of thermo-fuse, when super-high-current is by generating high temperature in current loop
When, thermo-fuse is burnt and forms open circuit by high temperature, thus reaches heat protection function.However, due to the prior art there is heat to protect
High temperature can not be still sensed in time slowly excessively as the response speed of the thermo-fuse of overheat protective structure in the varistor of protective function
It spends and open circuit in time, or the weaker easy failure of ability of tolerance heavy current impact；Pin, thermo-fuse in the prior art simultaneously
Connection with chip is mostly to be spot welded, and the weld strength under this structure is not high.Therefore the prior art with the pressure-sensitive of fail safe
Heat protection function possessed by resistance still has its defect.
Utility model content
The technical problems to be solved in the utility model is：A kind of Thermal protection type varistor is provided, there is preferable hot melt
Property and conductivity of heat, and connect it is firm, it is highly-safe.
Technical solution adopted by the utility model to solve its technical problems is：A kind of Thermal protection type varistor, including
Varistor ontology, the insulating trip being arranged on varistor ontology and the asphalt mixtures modified by epoxy resin for encapsulating varistor ontology and insulating trip
Rouge encapsulated layer；The first elongated slot and the second elongated slot are provided on the insulating trip；The depth and insulating trip of first elongated slot
Consistency of thickness；The length direction of the length direction and the first elongated slot of second elongated slot is vertically arranged；Second elongated slot
The downward depth depth downward less than the first elongated slot；Second elongated slot is opened up along the maximum gauge of insulating trip；Described
Second pin fixing groove is additionally provided on insulating trip.
Further, varistor ontology described in the utility model is zinc oxide ceramics chip；It is thermally conductive in order to increase
Area, insulating trip should be done greatly as far as possible, and varistor ontology described in the utility model is zinc oxide ceramics chip；Described
The outer diameter of insulating trip is less than or equal to the outer diameter of varistor ontology.
It further says, is provided with thermo-fuse in the second elongated slot described in the utility model；The one of the thermo-fuse
End extends in the first elongated slot and connect with the metal electrode layer of varistor ontology；The other end of thermo-fuse is in the second elongated slot
One end far from the first elongated slot is connected with the second pin being placed in second pin fixing groove.
It further says, in order to increase the contact area of thermo-fuse and second pin, hot melt described in the utility model
One end that silk is connect with second pin has bevel edge；Angle between second pin fixing groove and the second elongated slot is at an acute angle；It is described
Thermo-fuse by bevel edge be bonded with second pin after weld.
It further says, in the first elongated slot described in the utility model, the second elongated slot and second pin fixing groove
Hot melt adhesive is set, so as to disconnect thermo-fuse faster, plays the role of protecting product.
It further says, the first elongated slot described in the utility model is connect with third pin fixing groove；Described first
Elongated slot is connected with third pin fixing groove；The third pin fixing groove is not on the extended line of the first elongated slot.Third pin
Fixing groove plays position-limiting action to third pin, so that production technology is more simple and quick.
The utility model has the beneficial effects that solving defect present in background technique, the infiltration of hot melt adhesive is increased
Property, the contact area of thermo-fuse Yu varistor galactic pole is increased using the first elongated slot, so that the disconnection for improving thermo-fuse is rung
Answer efficiency；Also increase blocking distance when hot melt；And the connection reliability between thermo-fuse and pin is good, in batch metaplasia
It being capable of process simplification when production.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram at another visual angle of the utility model；
Fig. 3 is the structural schematic diagram of the utility model insulating trip；
In figure：10, epoxy resin enclosed layer；20, Zinc-oxide piezoresistor ontology；30, the first pin；40, insulating trip；
50, thermo-fuse；60, hot melt adhesive；70, second pin；80, third pin；90, solder joint；41, the first elongated slot；42, the second elongated slot；
43, second pin fixing groove；44, third pin fixing groove.
Specific embodiment
The utility model is described in further detail presently in connection with attached drawing and preferred embodiment.These attached drawings are letter
The schematic diagram of change, only illustrates the basic structure of the utility model in a schematic way, thus its only show it is related with the utility model
Composition.
A kind of Thermal protection type varistor as shown in Figs. 1-3, including varistor ontology 20, setting are in varistor sheet
The epoxy resin enclosed layer 10 of insulating trip 40 and encapsulating varistor ontology and insulating trip on body；Varistor ontology is oxygen
Change zinc ceramic chip.In order to increase heat-conducting area, insulating trip should be done greatly as far as possible, the outer diameter of insulating trip shown in Fig. 1-3
Size is less than or equal to the outer diameter of varistor ontology.If varistor ontology be circle, then insulating trip be diameter with it is pressure-sensitive
The equal circle of resistance diameter.
The first elongated slot 41 and the second elongated slot 42 are provided on insulating trip 40；The depth of first elongated slot 41 and the thickness of insulating trip
It is equal；Hot melt adhesive is preferably permeated；First elongated slot 41 is communicated with third pin fixing groove 44；Third pin is solid
Slot is determined not on the extended line of the first elongated slot.Third pin fixing groove plays position-limiting action to third pin, and when production, third is drawn
Foot is put into third pin fixing groove, can be to third pin since third pin fixing groove and the first elongated slot have angle
It quickly positions and is welded, do not need manually to align.
The length direction of second elongated slot 42 and the length direction of the first elongated slot 41 are vertically arranged；Because the second elongated slot does not need
It is contacted with resistance chip, therefore the downward depth of the second elongated slot 42 is less than the downward depth of the first elongated slot；Second elongated slot is along absolutely
The maximum gauge of embolium opens up；The length of thermo-fuse can be increased as far as possible in this way, to reach preferably fusing effect.
Thermo-fuse 50 is provided in second elongated slot 42；One end (right end) of thermo-fuse extend in the first elongated slot 41 and with pressure
The metal electrode layer of quick resistor main body connects；On insulating trip 40, second pin fixing groove 43 is provided with below the second elongated slot, heat
The other end (left end) of fuse 50 is connected with the second pin being placed in second pin fixing groove.In order to increase thermo-fuse and
The contact area of two pins, one end that thermo-fuse is connect with second pin have bevel edge；Second pin fixing groove and the second elongated slot
Between angle it is at an acute angle；Thermo-fuse welds after being bonded by bevel edge with second pin.
It is respectively provided with hot melt adhesive in first elongated slot, the second elongated slot, second pin fixing groove and third pin fixing groove, thus
Thermo-fuse can be made to disconnect faster, play the role of protecting product.
It is specific embodiment of the present utility model described in above instructions, various illustrations are not practical to this
Novel substantive content is construed as limiting, and person of an ordinary skill in the technical field can be to former institute after having read specification
The specific embodiment stated is made an amendment or is deformed, without departing from the spirit and scope of utility model.
Claims (6)
1. a kind of Thermal protection type varistor, including varistor ontology, the insulating trip being arranged on varistor ontology and
Encapsulate the epoxy resin enclosed layer of varistor ontology and insulating trip；It is characterized in that：First is provided on the insulating trip
Elongated slot and the second elongated slot；The depth of first elongated slot and the consistency of thickness of insulating trip；The length side of second elongated slot
It is vertically arranged to the length direction with the first elongated slot；The downward depth of second elongated slot depth downward less than the first elongated slot；
Second elongated slot is opened up along the maximum gauge of insulating trip；Second pin fixing groove is additionally provided on the insulating trip.
2. Thermal protection type varistor as described in claim 1, it is characterised in that：The varistor ontology is zinc oxide
Ceramic chip；The outer diameter of the insulating trip is less than or equal to the outer diameter of varistor ontology.
3. Thermal protection type varistor as described in claim 1, it is characterised in that：Hot melt is provided in second elongated slot
Silk；One end of the thermo-fuse extends in the first elongated slot and connect with the metal electrode layer of varistor ontology；Thermo-fuse
The other end be connected far from one end of the first elongated slot with the second pin being placed in second pin fixing groove in the second elongated slot.
4. Thermal protection type varistor as claimed in claim 3, it is characterised in that：The thermo-fuse is connect with second pin
One end have bevel edge；Angle between second pin fixing groove and the second elongated slot is at an acute angle；The thermo-fuse passes through bevel edge
It is welded after being bonded with second pin.
5. Thermal protection type varistor as described in claim 1, it is characterised in that：First elongated slot, the second elongated slot with
And hot melt adhesive is respectively provided in second pin fixing groove.
6. Thermal protection type varistor as described in claim 1, it is characterised in that：First elongated slot and third pin is solid
Determine slot to be connected；The third pin fixing groove is not on the extended line of the first elongated slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820723412.1U CN208157176U (en) | 2018-05-15 | 2018-05-15 | Thermal protection type varistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820723412.1U CN208157176U (en) | 2018-05-15 | 2018-05-15 | Thermal protection type varistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208157176U true CN208157176U (en) | 2018-11-27 |
Family
ID=64391049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820723412.1U Active CN208157176U (en) | 2018-05-15 | 2018-05-15 | Thermal protection type varistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208157176U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113192713A (en) * | 2021-04-27 | 2021-07-30 | 广西新未来信息产业股份有限公司 | Thermal protection piezoresistor |
| CN115458261A (en) * | 2022-09-23 | 2022-12-09 | 昆山万盛电子有限公司 | Voltage dependent resistor resistant to large impact current |
-
2018
- 2018-05-15 CN CN201820723412.1U patent/CN208157176U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113192713A (en) * | 2021-04-27 | 2021-07-30 | 广西新未来信息产业股份有限公司 | Thermal protection piezoresistor |
| CN115458261A (en) * | 2022-09-23 | 2022-12-09 | 昆山万盛电子有限公司 | Voltage dependent resistor resistant to large impact current |
| CN115458261B (en) * | 2022-09-23 | 2024-05-03 | 昆山万盛电子有限公司 | High-impact-current-resistant piezoresistor |
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