CN1917100A - Connection structure of outer shell for safe type piezoresistor - Google Patents
Connection structure of outer shell for safe type piezoresistor Download PDFInfo
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- CN1917100A CN1917100A CN 200610122008 CN200610122008A CN1917100A CN 1917100 A CN1917100 A CN 1917100A CN 200610122008 CN200610122008 CN 200610122008 CN 200610122008 A CN200610122008 A CN 200610122008A CN 1917100 A CN1917100 A CN 1917100A
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- insulation shell
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Abstract
The bonded structure includes insulation shell body and top cover. The insulation shell body is in shape of container with top being opened. The top cover is in shape of cap, that is to say cover board is tabulate, and circumference of cover board is raised. Thus, The top cover is in shape of lid. Detachable buckled connection with certain mechanical strength is made on place of coping openings between the body and top cover in order to guarantee top cover will not be separated from the insulation shell body when piezoresistor is in transportation, installation, and normal use. If piezoresistor is in failure, when gas generated in high temperature and in high pressure drastically cannot be discharged in time, then the top cover will be separated from the body effectively before explosion. The invention is applicable to electrical household appliances, products of power supply, computer center, communication area etc, where excessive pressure protection of piezoresistor is needed.
Description
Technical field
The present invention relates to a kind of piezo-resistance, be specifically related to a kind of connection structure of outer shell of safe type piezoresistor.
Background technology
Piezo-resistance is applied in the various electronic equipments widely as the protective device of electronic component, and under the normal voltage condition, it is equivalent to a capacitor; When overvoltage appearred in circuit, its internal resistance sharply descended and conducting rapidly, and other element does not damage because of overvoltage in the circuit thereby protected effectively.But simultaneously, because piezo-resistance electric current when losing efficacy sharply increases, temperature significantly rises, and the insulation and moisture that wrap up in envelope outside the voltage-sensitive ceramic substrate may be wrapped up in seal and ignite, and causes piezo-resistance fire burns, thereby initiation fire.
For this reason, how preventing the generation of fire when pressure responsive resistor failure, is the problem that must solve in the piezo-resistance practice.Chinese patent application number is 200410045212, publication number CN1571077A, open day is on January 26th, 2005, name is called in a kind of varistor with arc-extinguishing flame-retarding function and discloses a kind of varistor that can prevent fire, as shown in Figure 1, piezo-resistance 3 is installed in the insulation shell 2, two electrodes 6 of piezo- resistance 3,7 pass insulation bottom 5 and extend to the insulation shell outside, cavity between insulation shell 2 and the piezo-resistance 3 is filled with insulation and does not fire particle 4, be provided with air vent hole 1 in the insulation shell upper end, when said structure heats up rapidly at pressure responsive resistor failure, the effect certain to having of fire preventing.
Its weak point is: although these innovation and creation are provided with air vent hole 1 at the top of insulation shell 2, but the high temperature and high pressure gas that sharply produces during pressure responsive resistor failure is difficult in time discharge, when pressure acquires a certain degree, insulation shell 2 is blast probably just, thereby can damaged line plate and electric elements.
Summary of the invention
At the deficiencies in the prior art, the present invention is special to propose a kind of connection structure of outer shell of simple in structure, safe and reliable piezo-resistance.
In order to achieve the above object, the present invention takes following technical scheme:
A kind of connection structure of outer shell of safe type piezoresistor, mainly comprise insulation shell 2 and top cover 3, described insulation shell 2 is open-topped container-like, it is characterized in that: described top cover 3 is the cap shape, and is fastened and connected separably at the top open part of insulation shell 2.
Above-mentioned top cover 3 is the cap shape, is meant that the cover plate of top cover 3 is tabular and protruding cover-shaped body on every side.
Above-mentioned top cover 3 is separable with insulation shell 2 and is fastened and connected, the lug that is meant top cover 3 is fastened and connected at the top open part of insulation shell 2, and the bonding strength of top cover 3 and insulation shell 2 will be slightly smaller than the mechanical strength of insulation shell 2 and top cover 3 itself, with guarantee varistor in transportation, install and can not break away between top cover 3 and the insulation shell 2 when normally using; When pressure responsive resistor failure, fasten pressure in the formed cavity 4 in back at following top cover 3 and insulation shell 2, reach the blast pressure that breaks that insulation shell 2 or top cover 3 can bear before, insulation shell 2 can effectively separate with top cover 3; In order to guarantee the bonding strength of top cover 3 and insulation shell 2, can also coat adhesives at the top cover 3 and the contact-making surface of insulation shell 2.
Above-mentioned top cover 3 directly snaps onto the opening part of insulation shell 2; Also can positioning boss 21 be set at insulation shell 2 openend madial walls, the positioning boss 21 of the madial wall of top cover 3 and insulation shell 2 openends is connected; Can also on top cover 3 madial walls, barb 31 be set, at the corresponding and adaptive pit 22 of the root setting of positioning boss 21 and barb 31, the number of pit is identical with barb 31, concrete number is decided on the intensity of insulation shell 2, the bonding strength that is to say barb 31 and pit 22 will be slightly less than the mechanical strength of insulation shell 2 and top cover 3 itself, before guaranteeing that pressure in cavity 4 reaches the explosive force that breaks that insulation shell 2 or top cover 3 can bear, insulation shell 2 can effectively separate with top cover 3.Position corresponding with barb 31 on the cover plate of above-mentioned top cover 3 also is provided with demoulding hole 33, and demoulding hole 33 is used for extracting core rod when processing barb 31.
Above-mentioned top cover 3 can also be tabular, and insulation shell 2 openend madial walls are provided with groove, and top cover 3 integral body are entrenched in the groove;
Above-mentioned top cover 3 can also be tabular, at top cover 3 lateral edges positioning spigot is set, and top cover 3 embeds in insulation shell 2 openings by this positioning spigot;
Above-mentioned top cover 3 can also be tabular, and insulation shell 2 openend madial walls are provided with groove, at top cover 3 lateral edges positioning spigot are set, and top cover 3 is embedded in the groove of insulation shell 2 by positioning spigot.
The inner surface of above-mentioned insulation shell 2 also is provided with reinforcement 23, is used for increasing the intensity of insulation shell 2, also reinforcement 23 can be set at the outer surface of insulation shell 2, and reinforcement 23 can also be set on the surfaces externally and internally of insulation shell 2 simultaneously; In order to increase the intensity of top cover 3, also can reinforcement 23 be set simultaneously at the inner surface of top cover 3 or outer surface or surfaces externally and internally; Reinforcement 23 can be horizontally disposed with, and also can vertically be provided with, and can be obliquely installed, can also be arranged in a crossed manner.
Also be provided with air vent hole 32 on the cover plate of above-mentioned top cover 3, air vent hole 32 is to be used for discharging the thermal current that heats up and produce owing to pressure responsive resistor failure, and to reduce the air pressure in the following cavity 4, the shape of air vent hole 32 can be circle, rectangle or other shape.
Above-mentioned insulation shell 2 forms cavity 4 with top cover after 3 separable connections, the piezo-resistance 1 of packing in the cavity 4, and the electrode 5,6 on the piezo-resistance 1 passes the bottom of insulation shell 2 and extends to its outside.
Also be filled with insulation in the above-mentioned cavity 4 and do not fire particle, insulated particle can be a quartz sand etc.; Its main effect is to absorb the heat energy that heats up and produce owing to piezo-resistance in the cavity 4, can cushion also that issuable arc light simultaneously, breaks or explosion time at insulation shell 2 because piezo-resistance sharply heats up, also can absorb part energy, reduce the extent of damage of breaking or exploding.
The medial surface of above-mentioned top cover 3 and insulation are not fired and are provided with ventilated membrane 7 between the particle, ventilated membrane 7 Pastings are at the medial surface of top cover 3, also can be set directly at top cover 3 and insulate and not fire between the particle, not fire particle and be not leaked in the air vent hole 32 as long as guarantee insulation.
Compare with prior art; the present invention has following beneficial effect: (1) is because insulation shell 2 is separable connections with top cover 3; if the thermal current in the cavity 4 can not be discharged by air vent hole 32 rapidly; when pressure acquires a certain degree; before insulation shell 2 breaks or explodes; top cover 3 just can effectively separate with insulation shell, thereby has protected the electronic devices and components on the circuit board effectively, reduces the degree of infringement.(2) the present invention is simple in structure, with low cost, and can adopt mould to produce in enormous quantities, has reduced production cost.
The present invention extensively applies to household electrical appliance, power supply product, computer center, communication field etc. to be needed in the occasion of piezo-resistance overvoltage protection.
Description of drawings
Fig. 1 is prior art constructions figure;
Fig. 2 is the structure chart of the embodiment of the invention 1;
Fig. 3 is the structure chart of the embodiment of the invention 2;
Fig. 4 is the structure chart of the embodiment of the invention 3;
Fig. 5 is the stereogram of the embodiment of the invention 3;
Fig. 6 is the top cover stereogram of the embodiment of the invention 3;
Fig. 7 is the stereogram of the insulation shell of the embodiment of the invention 3;
Fig. 8 is the upward view of the top cover of the embodiment of the invention 3;
Fig. 9 is the A-A cutaway view of the top cover of the embodiment of the invention 3;
Figure 10 is the vertical view of the insulation shell of the embodiment of the invention 3;
Figure 11 is the B-B cutaway view of the insulation shell of the embodiment of the invention 3;
Figure 12 is the structure chart of the embodiment of the invention 4;
Figure 13 is the structure chart of the embodiment of the invention 5;
Figure 14 is the structure chart of the embodiment of the invention 6.
Embodiment
Below in conjunction with in conjunction with the accompanying drawings, further specify the specific embodiment of the present invention:
Embodiment 1: insulation shell 2 is open-topped container-like, the shape side of being body, and bottom and be one all around, top cover 3 is the cap shape, directly is entrenched in the top open part of insulation shell 2, as shown in Figure 2.
Embodiment 2: insulation shell 2 is open-topped container-like, the shape side of being body, bottom and be one all around, insulation shell 2 openend madial walls are provided with positioning boss 21, top cover 3 is the cap shape, directly is entrenched in insulation shell 2 openend madial walls and is provided with on the positioning boss 21, as shown in Figure 3.
Embodiment 3: insulation shell 2 is open-topped container-like, the shape side of being body, bottom and be one all around, insulation shell 2 openend madial walls are provided with positioning boss 21, positioning boss 21 upper ends are provided with chamfering, be used for cooperate installing top cover 3, be symmetrical arranged 6 grooves 22 at the root of positioning boss 21; The barb 31 of symmetrical distribution is set on top cover 3 madial walls, and barb 31 is identical and adaptive with the number of pit 22; Position corresponding with barb 31 on the cover plate of top cover 3 also is provided with demoulding hole 33, and demoulding hole 33 is used for extracting core rod when processing barb 31.Barb 31 embeds in the pits 22, as Fig. 4～shown in Figure 11.
Embodiment 4: insulation shell 2 is open-topped container-like, the shape side of being body, and bottom and be one all around, top cover 3 is tabular, and insulation shell 2 openend madial walls are provided with groove, and top cover 3 is entrenched in the groove, as shown in figure 12.
Embodiment 5: insulation shell 2 is open-topped container-like, the shape side of being body, and bottom and be one all around, top cover 3 is tabular, and top cover 3 lateral edges are provided with positioning spigot, and top cover 3 embeds in insulation shell 2 openings, as shown in figure 13 by this positioning spigot.
Embodiment 6: insulation shell 2 is open-topped container-like, the shape side of being body, bottom and be one all around, top cover 3 is tabular, the lateral edges of top cover 3 is provided with positioning spigot, insulation shell 2 openend madial walls are provided with groove, and top cover 3 is embedded in the groove of insulation shell 2 openends, as shown in figure 14 by seam.
For the intensity of reinforced insulation housing 2, the madial wall of above-mentioned insulation shell 2 from embodiment 1 to embodiment 6 is provided with reinforcement 23; Be provided with air vent hole 32 on the cover plate of top cover 3, the inboard of top cover 3 is provided with ventilated membrane 7.Ventilated membrane 7 does not all show in each figure.
Claims (10)
1. the connection structure of outer shell of a safe type piezoresistor, mainly comprise insulation shell (2) and top cover (3), described insulation shell (2) is open-topped container-like, it is characterized in that: described top cover (3) is the cap shape, and is fastened and connected separably at the top open part of insulation shell (2).
2. the shell jockey of a kind of safe type piezoresistor according to claim 1, it is characterized in that: described insulation shell (2) openend is provided with positioning boss (21), and the positioning boss (21) of the madial wall of top cover (3) and insulation shell (2) openend is connected.
3. the shell jockey of a kind of safe type piezoresistor according to claim 1, it is characterized in that: described insulation shell (2) openend is provided with positioning boss (21), the root of positioning boss (21) is provided with groove (22), the madial wall of top cover (3) is provided with barb (31), and barb (31) embeds in the groove (22).
4. the shell jockey of a kind of safe type piezoresistor according to claim 3 is characterized in that: also be provided with demoulding hole (33) with barb (31) correspondence position on the cover plate of top cover (3).
5. the shell jockey of a kind of safe type piezoresistor according to claim 1, it is characterized in that: described top cover (3) is tabular, insulation shell (2) openend madial wall is provided with groove, and top cover (3) embeds in the groove of insulation shell (2) openend.
6. the shell jockey of a kind of safe type piezoresistor according to claim 1, it is characterized in that: described top cover (3) is tabular, and the lateral edges of top cover (3) also is provided with positioning spigot, and the positioning spigot of top cover (3) embeds in the insulation shell (2).
7. the shell jockey of a kind of safe type piezoresistor according to claim 1, it is characterized in that: described top cover (3) is tabular, the lateral edges of top cover (3) also is provided with positioning spigot, insulation shell (2) openend madial wall is provided with groove, and top cover (3) embeds in the groove of insulation shell (2) openend.
8. according to the shell jockey of claim 1,2,3,4,5,6 or 7 described a kind of safe type piezoresistors, it is characterized in that: described insulation shell (2) inner surface or outer surface or surfaces externally and internally are provided with reinforcement (23).
9. according to the shell jockey of claim 1,2,3,4,5,6 or 7 described a kind of safe type piezoresistors, it is characterized in that: described top cover 3 inner surfaces or outer surface or surfaces externally and internally are provided with reinforcement (23).
10. according to the shell jockey of claim 1,2,3,4,5,6 or 7 described a kind of safe type piezoresistors, it is characterized in that: the cover plate of top cover (3) is provided with equally distributed air vent hole (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101220080A CN100477023C (en) | 2006-09-08 | 2006-09-08 | Connection structure of outer shell for safe type piezoresistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101220080A CN100477023C (en) | 2006-09-08 | 2006-09-08 | Connection structure of outer shell for safe type piezoresistor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1917100A true CN1917100A (en) | 2007-02-21 |
| CN100477023C CN100477023C (en) | 2009-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101220080A Expired - Fee Related CN100477023C (en) | 2006-09-08 | 2006-09-08 | Connection structure of outer shell for safe type piezoresistor |
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| CN (1) | CN100477023C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345662A (en) * | 2021-06-04 | 2021-09-03 | 巴州金富特种纱业有限公司 | High-power high-resistance special-shaped resistor |
-
2006
- 2006-09-08 CN CNB2006101220080A patent/CN100477023C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345662A (en) * | 2021-06-04 | 2021-09-03 | 巴州金富特种纱业有限公司 | High-power high-resistance special-shaped resistor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100477023C (en) | 2009-04-08 |
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