CN206421860U - Tubulose MOV without pin - Google Patents

Abstract

The utility model discloses a kind of tubulose MOV without pin, include MOV bodies, the MOV bodies are in a tubular form, it has an accommodating cavity, the internal face of the accommodating cavity is formed with first annular electrode by spraying, sputtering, deposition or type metal conductive material, and the outside wall surface of the MOV bodies is formed with the second annular electrode by spraying, sputtering, deposition or type metal conductive material.By using the MOV bodies of tubular structure, various electronic components can be stored in its accommodating cavity as needed, electronic component is connected with first annular electrode conduction, more electric functions can be realized, and reduce the space that electronic component occupies circuit board, so that circuit board size area is smaller, structure is also compacter.

Description

Tubulose MOV without pin

Technical field

The utility model is related to piezo-resistance art, refers in particular to a kind of tubulose MOV without pin.

Background technology

Piezo-resistance（MOV）It is a kind of votage limit type protection device.Using the nonlinear characteristic of piezo-resistance, when overvoltage goes out Two interpolars of present piezo-resistance, piezo-resistance can be by voltage clamping to a relatively-stationary magnitude of voltage, so as to realize pair The protection of late-class circuit.The major parameter of piezo-resistance has：Pressure sensitive voltage, discharge capacity, junction capacity, response time etc..

Traditional piezo-resistance body be by additives such as ZnO and transition metal oxides by mixing, ball milling, granulation, The effigurate ceramic body of tool of the techniques such as shaping, high temperature sintering formation.The geometry of piezo-resistance body can be round Shape, square or rectangle, however, current piezo-resistance body is solid construction, it needs and other electronic components one And arrange on circuit boards, cause circuit board size area larger.

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 without pin to the utility model Tubulose MOV, its can housing electronic component, reduce electronic component and occupy the space of circuit board.

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

A kind of tubulose MOV without pin, includes MOV bodies, and in a tubular form, it has an accommodating cavity, the appearance to the MOV bodies The internal face for putting chamber is formed with first annular electrode by spraying, sputtering, deposition or type metal conductive material, the MOV sheets The outside wall surface of body is formed with the second annular electrode by spraying, sputtering, deposition or type metal conductive material.

It is preferred that, the both ends open of the MOV bodies.

It is preferred that, the one end open of the MOV bodies, other end closing, first annular electrode is covered to accommodating cavity Inner bottom surface.

It is preferred that, the MOV bodies are metal oxide.

It is preferred that, the first annular electrode is silver or copper.

It is preferred that, second annular electrode is silver or copper.

It is preferred that, the first annular electrode includes the first basalis and the first top layer, and first basalis is aluminium Matter, the first basalis is fitted with the internal face of accommodating cavity, the first Surface mulch on the first basalis, the first top layer for silver or Copper.

It is preferred that, second annular electrode includes the second basalis and the second top layer, and second basalis is aluminium Matter, the second basalis is fitted with the outside wall surface of MOV bodies, the second Surface mulch on the second basalis, the second top layer for silver or Copper.

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

By using the MOV bodies of tubular structure, various electronic components, electronics can be stored in its accommodating cavity as needed Component is connected with first annular electrode conduction, it is possible to achieve more electric functions, and is reduced electronic component and occupied circuit The space of plate so that circuit board size area is smaller, and structure is also compacter.

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 schematic perspective view of first preferred embodiment of the utility model；

Fig. 2 is the sectional view of first preferred embodiment of the utility model；

Fig. 3 is the schematic perspective view of second preferred embodiment of the utility model；

Fig. 4 is the sectional view of second preferred embodiment of the utility model.

Accompanying drawing identifier declaration：

10th, MOV bodies 11, accommodating cavity

20th, first annular electrode 21, the first basalis

22nd, the first top layer 30, the second annular electrode

31st, the second basalis 32, the second top layer.

Embodiment

It refer to shown in Fig. 1 and Fig. 2, that show the concrete structure of first preferred embodiment of the utility model, bag MOV bodies 10 are included.

The MOV bodies 10 in a tubular form, its have an accommodating cavity 11, the accommodating cavity 11 for cylinder, the accommodating cavity 11 it is interior Wall is formed with first annular electrode 20 by spraying, sputtering, deposition or type metal conductive material, the MOV bodies 10 Outside wall surface is formed with the second annular electrode 30 by spraying, sputtering, deposition or type metal conductive material.

In the present embodiment, the both ends open of the MOV bodies 10, the MOV bodies 10 are metal oxide.

The first annular electrode 20 is that silver or copper, in the present embodiment, the first annular electrode 20 include first The top layer 22 of basalis 21 and first, first basalis 21 is aluminium material, and the internal face of the first basalis 21 and accommodating cavity 11 is pasted Close, the first top layer 22 is covered on the first basalis 21, the first top layer 22 is silver or copper, because aluminium material can be with MOV bodies 10 Strong bonded, copper or silver can with aluminium material strong bonded, therefore, in the present embodiment, by first spray aluminium material spray again silver or The mode of copper material, may be such that first annular electrode 20 is combined with MOV bodies 10 more firm, difficult for drop-off.

Second annular electrode 30 is that silver or copper, in the present embodiment, second annular electrode 30 include second The top layer 32 of basalis 31 and second, second basalis 31 is aluminium material, and the outside wall surface of the second basalis 31 and MOV bodies 10 is pasted Close, the second top layer 32 is covered on the second basalis 31, the second top layer 32 is silver or copper, it has been observed that because aluminium material can be with MOV Therefore the strong bonded of body 10, copper or silver, in the present embodiment, can again be sprayed with aluminium material strong bonded by first spraying aluminium material The mode of silver or copper material is applied, may be such that the second annular electrode 30 is combined with MOV bodies 10 more firm, it is difficult for drop-off.

During making, first, tubulose MOV bodies 10 are molded, then, the mouth of pipe of MOV bodies 10 is placed on tool upwards recessed In groove, tool groove has certain depth（The width of second annular electrode as needed is determined）, equipment passes through tool bottom The wind inlet in face adds air draught to hold the bottom surface of MOV bodies 10；Then, in mouth of pipe top brush protective paint/protective paste；Then, do and spray Apply, you can electrode is obtained with the specified location in MOV bodies 10, so as to form the first annular annular electrode of electrode 20 and second 30。

The operation principle that the present embodiment is described in detail is as follows：

In use, terminal is respectively welded on the first annular annular electrode 30 of electrode 20 and second（Do not show in figure）.Terminal Can be the lead of the electronic component of standard, such as cross section is circular or electrode slice, and such as cross section is rectangle, Material can be copper or copper covered steel, terminal is accessed circuit with welding circuit board, realize piezo-resistance function.If no Welding pin, then need to use fixing device（Do not show in figure）, with mechanical force so that terminal and first annular electrode 20 and There is good electrical contact between second ring electrode 30.Especially can be by electronic component（Such as fuse, discharge tube）It is placed in appearance Put in chamber 11, then so that one end of electronic component is connected with the conducting of first annular electrode 20, the other end of electronic component The circuit of circuit board is accessed, the space that electronic component occupies circuit board can be so reduced.

It refer to shown in Fig. 3 and Fig. 4, that show the concrete structure of second preferred embodiment of the utility model, sheet The concrete structure of embodiment and the concrete structure of foregoing first preferred embodiment are essentially identical, itself except that：

In the present embodiment, the one end open of the MOV bodies 10, other end closing, first annular electrode 20 is covered To the inner bottom surface of accommodating cavity 11.

The operation principle of the present embodiment is identical with the operation principle of foregoing first preferred embodiment, at this to the present embodiment Operation principle does not make detailed narration.

Design focal point of the present utility model is：, can be as needed in its accommodating cavity by using the MOV bodies of tubular structure Various electronic components are stored, electronic component is connected with first annular electrode conduction, it is possible to achieve more electric functions, and Reduce the space that electronic component occupies circuit board so that circuit board size area is smaller, and structure is also compacter.

Technical principle 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 (8)

1. a kind of tubulose MOV without pin, it is characterised in that：Include MOV bodies, in a tubular form, it has one to hold to the MOV bodies Chamber is put, the internal face of the accommodating cavity is formed with first annular electricity by spraying, sputtering, deposition or type metal conductive material Pole, the outside wall surface of the MOV bodies is formed with the second annular electrode by spraying, sputtering, deposition or type metal conductive material.

2. the tubulose MOV as claimed in claim 1 without pin, it is characterised in that：The both ends open of the MOV bodies.

3. the tubulose MOV as claimed in claim 1 without pin, it is characterised in that：The one end open of the MOV bodies, it is another End seal is closed, and the first annular electrode is covered to the inner bottom surface of accommodating cavity.

4. the tubulose MOV as claimed in claim 1 without pin, it is characterised in that：The MOV bodies are metal oxide.

5. the tubulose MOV as claimed in claim 1 without pin, it is characterised in that：The first annular electrode is silver or copper.

6. the tubulose MOV as claimed in claim 1 without pin, it is characterised in that：Second annular electrode is silver or copper.

7. the tubulose MOV as claimed in claim 1 without pin, it is characterised in that：The first annular electrode includes first Basalis and the first top layer, first basalis are aluminium material, and the first basalis is fitted with the internal face of accommodating cavity, the first top layer It is covered on the first basalis, the first top layer is silver or copper.

8. the tubulose MOV as claimed in claim 1 without pin, it is characterised in that：Second annular electrode includes second Basalis and the second top layer, second basalis are aluminium material, and the second basalis is fitted with the outside wall surface of MOV bodies, the second table Layer is covered on the second basalis, and the second top layer is silver or copper.