CN2601814Y

CN2601814Y - Conductive sealed pad

Info

Publication number: CN2601814Y
Application number: CN 03233244
Authority: CN
Inventors: 苏华; 邱智
Original assignee: Chengdu City Yimai Electron &
Current assignee: Chengdu City Yimai Electron &
Priority date: 2003-02-21
Filing date: 2003-02-21
Publication date: 2004-02-04
Anticipated expiration: 2013-02-21

Abstract

The utility model provides a conductive gasket. The conductive gasket is in the shape of closed ring and has at least one conductive sealing course. An elastic insulating layer compounded with the conductive sealing course is arranged inside the conductive gasket. The utility model has the advantages of good water tightness, steam tightness and conductibility, and can be widely applied for the communication system as a sealing element which supplies water and steam tightness and electromagnetic shielding for communication devices. The utility model is particular fit for the seal of the communication devices working in the bad environment such as high temperature and high humidity.

Description

The conductive seal liner

Technical field:

The utility model is relevant with liner, and is special relevant with the conductive seal liner that is used for communication system.

Background technology:

In communication system, just the electromagnetic interference (EMI) problem has appearred when the normal function of a part of circuit disturbs the normal function of another part circuit.And wherein topmost problem is from the interference of transmitter circuitry to receiver circuit, and particularly outstanding is that the electromagnetic wave that the slot leakage between cover plate and the casing is come out produces the problem of disturbing to system.These electromagnetic interference are that communication system does not wish to produce.Suppress electromagnetic interference and need electromagnetic shielding exactly, electromagnetic shielding is a kind of measure that stops the electromagnetic field of high frequency to be propagated in the space with shield, is the effective means that suppresses radiation interference.Practice of a large amount of communication engineering and electromagnetic shielding theories all prove: in the communication system, the electromagnetic leakage that shield fitting surface slits such as the cabinet of communication equipment, rack are located has seriously influenced electromagnetic compatibility (EMC) performance of communication equipment.Traditional conductive gasket mainly contains several big classes such as woven wire textile washer, metallic elastic liner and conductive fabric type liner.Although above-mentioned traditional conductive gasket can provide certain electromagnet shield effect for communication system, but, when communication system is used in adverse circumstances such as high temperature, high humidity, and when conductive gasket proposed requiring of watertight, steam packing, above-mentioned traditional conductive gasket just can't satisfy the requirement of communication system.

The utility model content:

The purpose of the utility model is to provide a kind of electromagnet shield effect that both had, the novel conductive liner that has watertight, steam packing performance again for the communication equipment in the communication system.Another purpose of the present utility model is for a kind of electromagnet shield effect that not only has is provided, and can reduce cost, good springiness, and watertight, steam tightness can better the conductive seal liner.

The purpose of this utility model is achieved like this:

The utility model conductive seal liner be shaped as closed annular, at least one deck conductive seal layer, the conductive seal layer can be made with silicon rubber or fluosilicic rubber and conductive filler, base material is silicon rubber or fluosilicic rubber, according to the specification difference of conductive seal liner, conductive filler can be selected a kind of or several in silver-plated of silver powder particles, the silver-plated particle of copper, the silver-plated particle of aluminium, the silver-plated particle of nickel and glass microsphere.

The elastic insulating layer compound with the conductive seal layer arranged in the above-mentioned conductive seal liner, and elastic insulating layer can adopt silicon rubber or fluosilicic rubber to make, and reduces cost, and increases elasticity, and watertight, steam packing performance are better.

Above-mentioned elastic insulating layer is arranged in the conductive seal layer.

Above-mentioned conductive seal layer is one deck, as required, also can be two layers or multilayer.

The ring cross sectional shape of above-mentioned conductive seal liner is square or V-arrangement or O shape or D shape or P shape or other shape.

The utility model is in order to provide certain elasticity, the base material of conductive seal layer is selected silicon rubber or fluorubber for use, for electromagnet shield effect is provided, in silicon rubber or fluosilicic rubber, fill a large amount of conductive fillers, adopt traditional silicon rubber or fluosilicic rubber under high temperature, condition of high voltage, to vulcanize compression molding technology; Thereby obtain a kind of electromagnet shield effect that both had, the novel conductive liner that has watertight, steam packing performance again.

The conductive seal liner can be made plurality of specifications, and the conductive seal liner of different electric conductivities is provided, to satisfy the requirement of different watertights, steam packing and electromagnetic shielding index that various communication equipments propose.

The utility model has overcome the defective that the conventional conductive liner can't provide watertight, steam packing ability for communication equipment, and (body resistivity is 1 * 10 not only to have good electrical conductivity ^-2～1 * 10 ^-4Ω-cm), and when the volume compressibility of conductive seal liner 〉=15%, cabinet, the rack that the communication equipment behind the conductive seal liner is installed have just had the ability of watertight, steam packing.

The utility model has the advantages that and both have electromagnet shield effect, have watertight, steam packing performance again, particularly behind conductive seal layer composite elastic insulating barrier, reduced cost, it is better to have increased elasticity, watertight, steam packing performance, therefore can be widely used in the communication system, as the seal that watertight, steam packing and electromagnetic shielding are provided for communication equipment.Especially be suitable for the sealing of the communication equipment of in adverse circumstances such as high temperature, high humidity, working.

Description of drawings:

Fig. 1 is the utility model structural representation.

Fig. 2 is the A-A cutaway view of Fig. 1.

Fig. 3 is the I portion enlarged drawing among Fig. 2.

Fig. 4 is the utility model structural representation of flexible insulating barrier.

Fig. 5 is the B-B cutaway view of Fig. 4.

Fig. 6 is the II portion enlarged drawing of Fig. 5.

The specific embodiment:

Embodiment 1:

Fig. 1～Fig. 3 is the utility model embodiment 1 figure.The utility model annular closed D shape conductive seal liner comprises containing a large amount of conductive fillers 1 the annular conductive seal layer 3 of silicon rubber 2.It is long to be 100mm, and wide be 46mm, and thickness is 6mm, and encircling cross sectional shape is D shape, is the sealing of debugging window that is used for a kind of cabinet of communication equipment.

The manufacture method of present embodiment conductive seal liner is: earlier conductive filler and silicon rubber are mixed in proportion; Then composite material is put into to carry out sizing material in the rubber mixing machine mixing, fully mixed up to conductive filler and silicon rubber; Again mixing uniform sizing material is seated in the mould; Then the mould that fills is placed on the pressure forming machine, under the high pressure of 140 ℃～180 ℃ high temperature, 0.25MN～1MN (million Ns), carries out sulfidization molding; Can produce the conductive seal liner through post vulcanization again.In the sulfidization molding process, silicon rubber is combined into the integral body with definite shape and character through complicated change procedure series of physical, chemistry with conductive filler.

Embodiment 2:

Fig. 4～Fig. 6 has provided the utility model embodiment 2 figure.Present embodiment 2 is basic same with embodiment 1.Do not exist together is in the annular conductive seal layer 3 silicon rubber elastic insulating layer 4 to be arranged.

Claims

1, conductive seal liner is characterized in that the closed annular that is shaped as of conductive seal liner one deck conductive seal layer at least being arranged.

2, conductive seal liner as claimed in claim 1 is characterized in that the elastic insulating layer compound with the conductive seal layer arranged in the conductive seal liner.

3, conductive seal liner as claimed in claim 2 is characterized in that elastic insulating layer is arranged in the conductive seal layer.

4,, it is characterized in that the conductive seal layer is one deck as the described conductive seal liner of one of claim 1～3.

5, as the described conductive seal liner of one of claim 1～3, the ring cross sectional shape that it is characterized in that the conductive seal liner is square or V-arrangement or O shape or D shape or P shape.

6, conductive seal liner as claimed in claim 4, the cross sectional shape that it is characterized in that the conductive seal liner are square or V-arrangement or O shape or D shape or P shape.