CN206331857U - Piezo-resistance with multiple protection functions - Google Patents

Abstract

The utility model discloses a kind of piezo-resistance with multiple protection functions, includes plastic shell, piezo-resistance substrate, first electrode, second electrode, thermistor and Thermal Cutoffs；The first electrode and second electrode are respectively arranged at the upper and lower surface of piezo-resistance substrate, the thermistor and Thermal Cutoffs are inlayed respectively to be fixed on inside the two ends of piezo-resistance substrate, the thermistor has two first pins, wherein one first pin contacts conducting with first electrode, another first pin stretches out plastic shell, the Thermal Cutoffs has two second pins, wherein a second pin contacts conducting with second electrode.It is fixed on by the way that thermistor and Thermal Cutoffs are inlayed respectively inside the two ends of piezo-resistance substrate, and it is equipped with plastic shell, piezo-resistance, thermistor and Thermal Cutoffs are reasonably combined together by this product, it is simple and compact for structure, and firmly, beneficial to lifting performance, extend the service life of product.

Description

Piezo-resistance with multiple protection functions

Technical field

The utility model is related to piezo-resistance art, refers in particular to a kind of pressure-sensitive electricity with multiple protection functions Resistance.

Background technology

" piezo-resistance " is a kind of resistance device with nonlinear wind vibration, is mainly used in when circuit bears overvoltage Voltage clamping is carried out, absorbs unnecessary electric current to protect Sensitive Apparatus.English name is " Voltage Dependent Resistor " is abbreviated as " VDR ", or is called " Varistor ".The resistor material of piezoresistor is semiconductor, so It is a kind of semiconductor resistor." zinc oxide " largely used now（ZnO）Piezoresistor, its material of main part There is diad zinc（Zn）With hexad oxygen（O）Constituted.So from the perspective of material, zinc oxide varistor is A kind of " II-VI race's oxide semiconductor ".

General piezo-resistance function is more single, it is impossible to the protection demand of external circuit is met, therefore, occurring in that has The piezo-resistance of multiple protection functions, it gathers together the protection devices such as thermistor, Thermal Cutoffs, however, above-mentioned The piezo-resistance with multiple protection functions its be only a variety of devices are simply pieced together, structure is not compact, Built on the sand.Therefore, it is necessary to be improved to the current piezo-resistance with multiple protection functions.

The content of the invention

In view of this, in view of the existing deficiencies of the prior art, its main purpose is to provide a kind of with many utility model The piezo-resistance of weight defencive function, it is not compact that it can effectively solve the existing piezo-resistor structure with multiple protection functions Unstable problem.

To achieve the above object, the utility model is using following technical scheme：

A kind of piezo-resistance with multiple protection functions, include plastic shell, piezo-resistance substrate, first electrode, Second electrode, thermistor and Thermal Cutoffs；Piezo-resistance substrate, first electrode, second electrode, thermistor and the temperature Degree fuse may be contained within plastic shell, and the first electrode and second electrode are respectively arranged at the upper following table of piezo-resistance substrate Face, the thermistor and Thermal Cutoffs are inlayed respectively to be fixed on inside the two ends of piezo-resistance substrate, and the thermistor has Two first pins, wherein one first pin contacts conducting with first electrode, another first pin stretches out plastic shell, and the temperature is protected Dangerous silk has two second pins, wherein a second pin contacts conducting with second electrode, another second pin stretches out plastic shell.

It is preferred that, the first electrode includes the first aluminium coated and the first copper plate, first aluminium coated and pressure-sensitive electricity The surface laminating for hindering substrate is fixed, and first copper plate is covered on the first aluminium coated, and the first copper plate and the first pin are welded Connect；The second electrode includes the second aluminium coated and the second copper plate, another table of second aluminium coated and piezo-resistance substrate Face laminating is fixed, and second copper plate is covered on the second aluminium coated, and the second copper plate is welded with second pin.

It is preferred that, the plastic shell is fire retardant plastic material.

It is preferred that, the thermistor is semistor.

It is preferred that, another first pin and another second pin extend vertically down the bottom of plastic shell.

The utility model has clear advantage and beneficial effect compared with prior art, specifically, by above-mentioned technology Scheme is understood：

It is fixed on inside the two ends of piezo-resistance substrate, and is coordinated by the way that thermistor and Thermal Cutoffs are inlayed respectively Plastic shell is provided with, piezo-resistance, thermistor and Thermal Cutoffs are reasonably combined together by this product, simple in construction It is compact, and firmly, beneficial to lifting performance, extend the service life of product.

More clearly to illustrate architectural feature of the present utility model and effect, come below in conjunction with the accompanying drawings with specific embodiment pair The utility model is described in detail.

Brief description of the drawings

Fig. 1 is the sectional view of the preferred embodiment of the utility model.

Accompanying drawing identifier declaration：

10th, plastic shell 20, piezo-resistance substrate

21st, embedding slot 30, first electrode

31st, the first aluminium coated 32, the first copper plate

40th, second electrode 41, the second aluminium coated

42nd, the second copper plate 50, thermistor

51st, the first pin 60, Thermal Cutoffs

61st, second pin.

Embodiment

It refer to shown in Fig. 1, that show the concrete structure of the preferred embodiment of the utility model, include outside plastic cement Shell 10, piezo-resistance substrate 20, first electrode 30, second electrode 40, thermistor 50 and Thermal Cutoffs 60.

The plastic shell 10 is fire retardant plastic material, and flame-retarding characteristic is good, it is to avoid ignition.

The piezo-resistance substrate 20, first electrode 30, second electrode 40, thermistor 50 and Thermal Cutoffs 60 are respectively provided with In in plastic shell 10, the first electrode 30 and second electrode 40 are respectively arranged at the upper and lower surface of piezo-resistance substrate 20, In the present embodiment, the upper and lower surface of piezo-resistance substrate 20 has embedding slot 21, and the first electrode 30 and second electrode 40 are distinguished It is embedded in corresponding embedding slot 21.

The thermistor 50 and Thermal Cutoffs 60 are inlayed respectively to be fixed on inside the two ends of piezo-resistance substrate 20, the heat Quick resistance 50 has two first pins 51, wherein one first pin 51 contacts conducting, another first pin 51 with first electrode 30 Plastic shell 10 is stretched out, the Thermal Cutoffs 60 has two second pins 61, wherein a second pin 61 connects with second electrode 40 Conducting is touched, another second pin 61 stretches out plastic shell 10.In the present embodiment, the thermistor 50 is positive temperature coefficient heat Quick resistance, another first pin 51 and another second pin 61 extend vertically down the bottom of plastic shell 10.

And, the first electrode 30 includes the first aluminium coated 31 and the first copper plate 32, first aluminium coated 31 with The surface laminating of piezo-resistance substrate 20 is fixed, and first copper plate 32 is covered on the first aluminium coated 31, the first copper plate 32 weld with the first pin 51；The second electrode 40 includes the second aluminium coated 41 and the second copper plate 42, second aluminium coated 41 are fitted fixation with another surface of piezo-resistance substrate 20, and second copper plate 42 is covered on the second aluminium coated 41, and second Copper plate 42 is welded with second pin 61.

In use, the first pin 51 and second pin 61 that stretch out plastic shell 10 are electrically connected i.e. with external circuit welding Can, after access, this product integrates piezo-resistance, thermistor and Thermal Cutoffs function, and thermistor, pressure-sensitive electricity Resistance and Thermal Cutoffs are sequentially connected in series, and corresponding defencive function is played to electrical equipment.

Design focal point of the present utility model is：Pressure-sensitive electricity is fixed on by the way that thermistor and Thermal Cutoffs are inlayed respectively Inside the two ends for hindering substrate, and plastic shell is equipped with, this product closes piezo-resistance, thermistor and Thermal Cutoffs Being combined together for reason, it is simple and compact for structure, and firmly, beneficial to lifting performance, extend the service life of product.

Know-why of the present utility model is described above in association with specific embodiment.These descriptions are intended merely to explain this reality With new principle, and the limitation to the utility model protection domain can not be construed in any way.Based on explanation herein, Those skilled in the art, which would not require any inventive effort, can associate other embodiments of the present utility model, These modes are fallen within protection domain of the present utility model.

Claims (4)

1. a kind of piezo-resistance with multiple protection functions, it is characterised in that：Include plastic shell, piezo-resistance substrate, First electrode, second electrode, thermistor and Thermal Cutoffs；Piezo-resistance substrate, first electrode, second electrode, the heat Quick resistance and Thermal Cutoffs may be contained within plastic shell, and the first electrode and second electrode are respectively arranged at piezo-resistance base The upper and lower surface of piece, the thermistor and Thermal Cutoffs are inlayed respectively to be fixed on inside the two ends of piezo-resistance substrate, the heat Quick resistance has two first pins, wherein one first pin contacts conducting with first electrode, another first pin is stretched out outside plastic cement Shell, the Thermal Cutoffs has two second pins, wherein a second pin contacts conducting with second electrode, another second pin is stretched Go out plastic shell；The first electrode includes the first aluminium coated and the first copper plate, first aluminium coated and piezo-resistance base The surface laminating of piece is fixed, and first copper plate is covered on the first aluminium coated, and the first copper plate and the first pin are welded；Should Second electrode includes the second aluminium coated and the second copper plate, and second aluminium coated is fitted with another surface of piezo-resistance substrate Fixed, second copper plate is covered on the second aluminium coated, and the second copper plate is welded with second pin.

2. there is the piezo-resistance of multiple protection functions as claimed in claim 1, it is characterised in that：The plastic shell is resistance Fire plastic cement material.

3. there is the piezo-resistance of multiple protection functions as claimed in claim 1, it is characterised in that：The thermistor is just Temperature coefficient thermistor.

4. there is the piezo-resistance of multiple protection functions as claimed in claim 1, it is characterised in that：Another first pin The bottom of plastic shell is extended vertically down with another second pin.