CN209487270U - A kind of Thermal protection type varistor - Google Patents
A kind of Thermal protection type varistor Download PDFInfo
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- CN209487270U CN209487270U CN201920151742.2U CN201920151742U CN209487270U CN 209487270 U CN209487270 U CN 209487270U CN 201920151742 U CN201920151742 U CN 201920151742U CN 209487270 U CN209487270 U CN 209487270U
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- varistor
- elongated slot
- insulating trip
- 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；Orthogonal first elongated slot and the second elongated slot are provided on the insulating trip；Thermo-fuse is provided in second elongated slot, the thermo-fuse be it is flat, thermo-fuse, which has, to be arranged in the flat part linkage section connecting in the second elongated slot with the second pin of varistor and is arranged in the linkage section connecting in the first elongated slot with the third pin of varistor ontology and varistor；The trimming convenient for positioning is provided on the insulating trip.The utility model increases the contact area with the welding surface of second pin and fuse solder joint and varistor galactic pole; location structure is increased simultaneously; product function stability is not only increased, suitable for the Thermal protection demand of different overcurrent/voltages, and is conducive to semi-automatic, automated job.
Description
Technical field
The utility model relates to a kind of electronic component, especially a kind of Thermal protection type varistor.
Background technique
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, heat protection function possessed by the varistor with fail safe of the prior art still has its defect:
One, due in the varistor with heat protection function of the prior art as the thermo-fuse of overheat protective structure
Response speed can not still sense excessive temperature and timely open circuit excessively in time slowly, or the weaker appearance of ability of tolerance heavy current impact
It is vulnerable；
Two, the connection of pin, thermo-fuse and chip is mostly to be spot welded in the prior art, and the weld strength under this structure is not
It is high；
Three, the varistor of the prior art does not have a location structure, with certain work when semi-automatic, automated job
Skill difficulty.
Utility model content
Technical problem to be solved by the utility model is: providing a kind of Thermal protection type varistor, there is preferable hot melt
Property and conductivity of heat, and connect it is firm, it is highly-safe, it is easy to produce.
The technical scheme adopted by the utility model to solve the technical problem is as follows: 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；Orthogonal first elongated slot and the second elongated slot are provided on the insulating trip；It is set in second elongated slot
Be equipped with thermo-fuse, the thermo-fuse be it is flat, thermo-fuse has to be arranged in the second elongated slot to be drawn with the second of varistor
The flat part linkage section of foot connection and third pin with varistor ontology and varistor is set in the first elongated slot
The linkage section of connection；The trimming convenient for positioning is provided on the insulating trip.
Further, linkage section described in the utility model is that setting is integrally formed in flat part end and with flat part
A round corner section.
Further to say, flat part and the round corner section of thermo-fuse described in the utility model are arranged in a mutually vertical manner, in order to
The bonding area for increasing thermo-fuse and second pin, and increases fuse breaking distance, and the second pin is in flat part far from the
It is welded after being overlapped with flat part the position of one elongated slot；In order to increase the contact area with varistor galactic pole, the following table of round corner section
Face is connect with varistor ontology and third pin.
It further says, trimming described in the utility model is set to the top of insulating trip, quick when easy to produce
Positioning.
It further says, varistor ontology described in the utility model is zinc oxide ceramics chip；It is led to increase
Heat area, insulating trip should be done greatly as far as possible, and the outer diameter of insulating trip described in the utility model is less than or equal to pressure-sensitive electricity
Hinder the outer diameter of ontology.
The beneficial effects of the utility model are:
1, the contact area with the welding surface of second pin and fuse solder joint and varistor galactic pole is increased, to product
Heat protection function has great improvement, improves product function stability, and can be applicable according to adjustment different-thickness, shape
In the Thermal protection demand of different overcurrent/voltages；
2, location structure is increased, semi-automatic, automated job is conducive to.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of the utility model insulating trip；
Fig. 3-6 is the structural schematic diagram of the utility model thermo-fuse；
In figure: 30, the first pin；40, insulating trip；50, thermo-fuse；60, hot melt adhesive；70, second pin；80, third is drawn
Foot；90, solder joint；100, technique trimming；41, the first elongated slot；42, the second elongated slot；43, second pin fixing groove；44, third pin
Fixing groove；51, flat part；52, with second pin welding surface；53, round corner section；54, linkage section.
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, setting are in varistor ontology
On insulating trip 40 and encapsulate varistor ontology and insulating trip epoxy resin enclosed layer；Varistor ontology is zinc oxide
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
It is consistent with the outer diameter of varistor ontology.If varistor ontology is circle, then insulating trip is diameter and varistor
The equal circle of diameter.
As shown in Fig. 2, the technique trimming that the top of insulating trip 40 is provided with convenient for positioning, can make product in work in this way
It is rapidly performed by positioning alignment on skill production line, is produced convenient for streamlined.
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；Second elongated slot 42
The length direction of length direction and the first elongated slot 41 be vertically arranged；Because the second elongated slot does not need to contact with resistance chip, because
The downward depth of this second elongated slot 42 is less than the downward depth of the first elongated slot；Second elongated slot is opened along the maximum gauge of insulating trip
If；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 and the first elongated slot 41；Thermo-fuse 50 has orthogonal flat part
51 and round corner section 53；Round corner section 53 is connect in the first elongated slot 41 with the metal electrode layer of varistor ontology；On insulating trip 40,
Second pin fixing groove 43, flat part 51 and the second pin being placed in second pin fixing groove are provided with below second elongated slot
It is connected.In order to increase the contact area of thermo-fuse and second pin, second pin is welded after being bonded with the end face of flat part 51.
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.
Thermo-fuse, which is flattened, can increase operation polarization, improve product function stability, be suitable for different overcurrent/voltages
Thermal protection demand；According to other embodiments, the structure of thermo-fuse can also be as Figure 4-Figure 6, and thermo-fuse can be flat
Linear structure, camber line structure of shape etc..Dotted line in Fig. 4-6 indicates the line of demarcation of flat part 51 and linkage section 54, actual product
In, flat part and linkage section are integrated.
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 (5)
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 by: being provided on the insulating trip mutually
Vertical the first elongated slot and the second elongated slot；Thermo-fuse is provided in second elongated slot, the thermo-fuse is flat, heat
Fuse, which has, to be arranged in the flat part linkage section connecting in the second elongated slot with the second pin of varistor and is arranged first
The linkage section being connect in elongated slot with the third pin of varistor ontology and varistor；It is provided with and is convenient on the insulating trip
The trimming of positioning.
2. a kind of Thermal protection type varistor as described in claim 1, it is characterised in that: the linkage section is arranged flat
Flat section end and with the integrally formed round corner section of flat part.
3. a kind of Thermal protection type varistor as claimed in claim 2, it is characterised in that: the round corner section flat part and phase
It is mutually vertically arranged, the second pin is welded behind position of the flat part far from the first elongated slot and flat part overlap joint, round corner section
Lower surface connect with varistor ontology and third pin.
4. a kind of Thermal protection type varistor as described in claim 1, it is characterised in that: the trimming is set to insulating trip
Top.
5. a kind of Thermal protection type varistor as described in claim 1, it is characterised in that: the outer diameter of the insulating trip
Less than or equal to the outer diameter of varistor ontology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920151742.2U CN209487270U (en) | 2019-01-29 | 2019-01-29 | A kind of Thermal protection type varistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920151742.2U CN209487270U (en) | 2019-01-29 | 2019-01-29 | A kind of Thermal protection type varistor |
Publications (1)
| Publication Number | Publication Date |
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| CN209487270U true CN209487270U (en) | 2019-10-11 |
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ID=68132974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920151742.2U Active CN209487270U (en) | 2019-01-29 | 2019-01-29 | A kind of Thermal protection type varistor |
Country Status (1)
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| CN (1) | CN209487270U (en) |
Cited By (1)
| 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 |
-
2019
- 2019-01-29 CN CN201920151742.2U patent/CN209487270U/en active Active
Cited By (1)
| 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 |
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