CN206331859U

CN206331859U - Piezo-resistance with overcurrent protection function

Info

Publication number: CN206331859U
Application number: CN201621158651.4U
Authority: CN
Inventors: 付国勇; 彭重音
Original assignee: Dongguan Bike Electronics Co Ltd
Current assignee: Dongguan Bike Electronics Co Ltd
Priority date: 2016-10-25
Filing date: 2016-10-25
Publication date: 2017-07-14
Anticipated expiration: 2026-10-25

Abstract

The utility model discloses a kind of piezo-resistance with overcurrent protection function, includes plastic shell, piezo-resistance substrate, first electrode, second electrode, the first Thermal Cutoffs and second temperature fuse；The first electrode and second electrode are respectively arranged at the upper and lower surface of piezo-resistance substrate, and first Thermal Cutoffs has two first pins, and the second temperature fuse has two second pins.It is fixed on by the way that the first Thermal Cutoffs and second temperature fuse are inlayed respectively inside the two ends of piezo-resistance substrate; and it is equipped with plastic shell; piezo-resistance, the first Thermal Cutoffs and second temperature fuse are reasonably combined together by this product; good overcurrent protection function can be realized using the first Thermal Cutoffs and second temperature fuse; meet the protection demand of external circuit; this product is simple and compact for structure; and firmly; beneficial to lifting performance, extend the service life of product.

Description

Piezo-resistance with overcurrent protection function

Technical field

The utility model is related to piezo-resistance art, refers in particular to a kind of pressure-sensitive electricity with overcurrent protection function 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, without overcurrent protection function, it is impossible to meet the protection of external circuit Demand, therefore, it is necessary to be improved to current piezo-resistance.

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 one kind to be had the utility model The piezo-resistance of defencive function is flowed, it can effectively solve the problem of existing piezo-resistance is without overcurrent protection function.

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

A kind of piezo-resistance with overcurrent protection function, include plastic shell, piezo-resistance substrate, first electrode, Second electrode, the first Thermal Cutoffs and second temperature fuse；The piezo-resistance substrate, first electrode, second electrode, One Thermal Cutoffs and second temperature fuse be may be contained within plastic shell, and the first electrode and second electrode are respectively arranged at The upper and lower surface of piezo-resistance substrate, first Thermal Cutoffs and second temperature fuse are inlayed be fixed on piezo-resistance respectively Inside the two ends of substrate, first Thermal Cutoffs has two first pins, wherein one first pin is contacted with first electrode and led Logical, another first pin stretches out plastic shell, and the second temperature fuse has two second pins, wherein a second pin and the Two electrode contacts are turned on, and 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, 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：

The two ends of piezo-resistance substrate are fixed on by the way that the first Thermal Cutoffs and second temperature fuse are inlayed respectively Inside, and plastic shell is equipped with, this product is reasonable by piezo-resistance, the first Thermal Cutoffs and second temperature fuse Be combined together, can realize good overcurrent protection function using the first Thermal Cutoffs and second temperature fuse, meet The protection demand of external circuit, this product is simple and compact for structure, and firmly, beneficial to lifting performance, extends making for product Use the life-span.

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, the first Thermal Cutoffs

51st, the first pin 60, second temperature fuse

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, the first Thermal Cutoffs 50 and second temperature fuse 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, the first Thermal Cutoffs 50 and second temperature insurance Silk 60 may be contained within plastic shell 10, and the first electrode 30 and second electrode 40 are respectively arranged at the upper of piezo-resistance substrate 20 Lower surface, in the present embodiment, the upper and lower surface of piezo-resistance substrate 20 have embedding slot 21, the electricity of first electrode 30 and second Pole 40 is embedded in corresponding embedding slot 21 respectively.

First Thermal Cutoffs 50 and second temperature fuse 60 are inlayed respectively is fixed on the two of piezo-resistance substrate 20 End is internal, and first Thermal Cutoffs 50 has two first pins 51, wherein one first pin 51 is contacted with first electrode 30 and led Logical, another first pin 51 stretches out plastic shell 10, and the second temperature fuse 60 has two second pins 61, wherein one second Pin 61 contacts conducting with second electrode 40, and another second pin 61 stretches out plastic shell 10.In the present embodiment, it is described 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, the first Thermal Cutoffs and second temperature fusing function, and first Thermal Cutoffs, piezo-resistance and second temperature fuse are sequentially connected in series, and corresponding defencive function is played to electrical equipment.

Design focal point of the present utility model is：By the way that the first Thermal Cutoffs and second temperature fuse are inlayed into solid respectively Inside the two ends for being scheduled on piezo-resistance substrate, and it is equipped with plastic shell, this product is by piezo-resistance, the first Temperature protection Silk and second temperature fuse are reasonably combined together, and can be realized very using the first Thermal Cutoffs and second temperature fuse Good overcurrent protection function, meets the protection demand of external circuit, this product is simple and compact for structure, and firmly, beneficial to lifting Performance, extends 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

1. a kind of piezo-resistance with overcurrent protection function, it is characterised in that：Include plastic shell, piezo-resistance substrate, First electrode, second electrode, the first Thermal Cutoffs and second temperature fuse；The piezo-resistance substrate, first electrode, Two electrodes, the first Thermal Cutoffs and second temperature fuse may be contained within plastic shell, the first electrode and second electrode The upper and lower surface of piezo-resistance substrate is respectively arranged at, first Thermal Cutoffs and second temperature fuse inlay fixation respectively Inside the two ends of piezo-resistance substrate, first Thermal Cutoffs has two first pins, wherein one first pin and first Electrode contact is turned on, and another first pin stretches out plastic shell, and the second temperature fuse has two second pins, wherein one the Two pins contact conducting with second electrode, and another second pin stretches out plastic shell；The first electrode includes first and aluminized Layer and the first copper plate, first aluminium coated are fitted fixation with a surface of piezo-resistance substrate, and first copper plate is covered in On first aluminium coated, the first copper plate and the first pin are welded；The second electrode includes the second aluminium coated and the second copper plate, Second aluminium coated is fitted fixation with another surface of piezo-resistance substrate, and second copper plate is covered on the second aluminium coated, Second copper plate is welded with second pin.

2. there is the piezo-resistance of overcurrent protection function 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.