CN1863450A - Electromagnetic screening casing - Google Patents
Electromagnetic screening casing Download PDFInfo
- Publication number
- CN1863450A CN1863450A CN 200510116688 CN200510116688A CN1863450A CN 1863450 A CN1863450 A CN 1863450A CN 200510116688 CN200510116688 CN 200510116688 CN 200510116688 A CN200510116688 A CN 200510116688A CN 1863450 A CN1863450 A CN 1863450A
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- Prior art keywords
- upper shell
- lower house
- inboard
- electromagnetic screening
- overlapping muscle
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Abstract
This invention relates to an electromagnetic screen shell made of electroconductive materials, in which, a screen body made of conductive plastic material or metal material is set at the joint of the shell, said plastic material is made by adding metallic fiber stainless steel wires in PC and uniformly distributing them on the spare part to form a conductive net of electromagnetic screen, which can increase the depth of the slot based on the theory of the screen and increase the screen function of the slot and just the laminated region increases the depth of the slot to reach the effect of electromagnetic screen.
Description
Technical field
The present invention relates to the structural design and the electromagnetic protection field of electronic product, relate in particular to a kind of casing with electro-magnetic screen function.
Background technology
Along with the high speed development of electrical and electronic technology, electronic communication equipment is not only used widely industrial having obtained, and has also entered family, office and meeting room etc.The electromagnetic compatibility of electronic communication equipment (Electromagnetic Compatibility, being meant that equipment or subsystem can operate as normal in its electromagnetic environment and other equipment in this environment or subsystem are not constituted the ability of the electromagnetic disturbance that can not bear, being called for short EMC) property is a very important performance parameter of electronic communication equipment.
With the video conferencing is example: video conferencing be utilize TV tech and equipment by transmission channel in two places or a plurality of place a kind of means of communication of having a meeting, participant's image in a meeting-place and the suggestion of delivering can be communicated to another meeting-place by video camera and microphone, realize discussing consultation, on effect, can replace on-the-spot meeting fully with the participant in the other side meeting-place.Video conference terminal is exactly an equipment of realizing this function, directly in the face of the user.Therefore moulding must be elegant in appearance, has stronger affinity, is rich in sense of the times.In structural design, must consider meticulously, high-grade, embody technicalization, high-quality, high added value.Generally speaking, sheathing material need use plastic parts.For the structual shield of this plastic shell, much be at present the method that adopts bag metal-back in the plastic cement shell, half spray conductive paint of employing is also arranged, and half uses the method for metal-back, and the method for conductive paint is sprayed in less employing entirely.
A kind of method is arranged, and the structual shield of plastic cement shell is to adopt upper casing spray conductive paint, and the method for lower casing inner liner metal shell adopts conductive fabric to shield at the place, slit.The using method of conductive fabric is: make a flange in the metal-back upper surface, above conductive fabric is attached to.The plastic cement upper casing is done some reinforcements at interval simultaneously, pushes down conductive fabric and plays conduction and the effect that is connected.The shortcoming of this method is: the metal-back of lower casing liner will encase the main printed board of handling, and volume ratio is bigger.When producing in batches, metal-back need be opened particular manufacturing craft, and many again simultaneously structural members have increased overall cost.Also have conductive fabric to compress, and the slit of upper and lower shell generally is in the centre of whole housing side by upper and lower shell.After final assembly was finished, the slit was bigger, and easily dehisced, and had reduced the aesthetic feeling and the high value sense of product.
The another kind of method of using always: the structual shield of plastic cement shell is that upper casing uses thin stainless steel substrates, and lower casing uses thicker intensity electrolytic zinc-coated steel sheet preferably, then directly shields by go out next the contact with lower casing of some shell fragments at upper casing at the place, slit.The shortcoming of this method is: because upper and lower shell all is a metalwork, need open the panel beating mould in actual production, cost is higher.In addition, the slit of upper and lower shell generally also is in the centre of whole housing side.After final assembly was finished, the slit was bigger, and easily dehisced, and had reduced the aesthetic feeling and the high value sense of product.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the purpose of this invention is to provide a kind of need not out particular manufacturing craft, rational in infrastructure, assemble simple electromagnetic screening casing.
The objective of the invention is to be achieved through the following technical solutions:
A kind of electromagnetic screening casing, it is made up of upper shell and lower house, and described upper shell and lower house are conductive plastic material and make; Seam crossing at upper shell and lower house is provided with shield.
Described shield can be made also and can be made by metal material by conductive plastic material.
Described conductive plastic material is to have added metallic fiber in plastic rubber substrate, will be injection molded into upper shell or lower house after the conductive plastic material fusion, and metallic fiber is uniformly distributed in the plastic rubber substrate.
Described plastic rubber substrate is polycarbonate, engineering plastics ABS, polyurethane, chliorinated polyvinyl chloride CPVC, rigid polyvinyl chloride PVC, polyethylene DPE, polypropylene PP, polysulfones PSU, polyformaldehyde POM, nylon, phenolic plastics PF, polyimides PI or epoxy resin plastics EP.
Described metallic fiber is stainless steel wire, copper wire, iron wire, aluminium wire, copper alloy silk, aluminum-alloy wire, galvanized wire or zinc silk.
Described shield is formed in that seam crossing is overlapping by upper shell and lower house.
Described shield is that the following overlay region that last overlapping muscle that the upper shell inboard is provided with stretches into the lower house inboard constitutes;
Perhaps,
Described shield is that the last overlay region that following overlapping muscle that the lower house inboard is provided with stretches into the upper shell inboard constitutes.
Described shield is the following overlay region that last overlapping muscle that the upper shell inboard is provided with stretches into the lower house inboard, and the last overlay region that the following overlapping muscle that is provided with of lower house inboard stretches into the upper shell inboard constitutes;
Perhaps,
Described shield is the last overlay region that following overlapping muscle that the lower house inboard is provided with stretches into the upper shell inboard, and the following overlay region that the last overlapping muscle that is provided with of upper shell inboard stretches into the lower house inboard constitutes.
Described overlapping muscle or following overlapping muscle are fixed on upper shell or the lower house.
Described overlapping muscle or following overlapping muscle and upper shell or lower house are made one.
By the technical scheme of the invention described above as can be seen, electromagnetic screening casing of the present invention adopts conductive plastic material to make, and also is provided with shield at the seam crossing of housing.Shield is made by conductive plastic material or metal material is made.Described conductive plastic material has added the metallic fiber stainless steel wire in the plastic rubber substrate polycarbonate, stainless steel fibre is evenly distributed in the whole part, has formed the conductive network of an electromagnetic shielding.Because the existence of shield according to the electromagnetic shielding theory, strengthens the degree of depth in slit, will increase the screening effectiveness in slit.And the degree of depth in slit has been strengthened in this section overlapping region just, has reached the effect of electromagnetic shielding.Therefore electromagnetic shielding machine of the present invention need not out particular manufacturing craft, and cost is low, and is rational in infrastructure, and assembling is simple, and product is attractive in appearance, has the high value sense.
Description of drawings
Fig. 1: the structural representation of electromagnetic screening casing of the present invention;
Fig. 2: the structural representation of the lower house of electromagnetic screening casing of the present invention;
Fig. 3: the structural representation of the upper shell of electromagnetic screening casing of the present invention;
Fig. 4: the partial schematic diagram one of electromagnetic screening casing of the present invention;
Fig. 5: the partial schematic diagram two of electromagnetic screening casing of the present invention.
Embodiment
A kind of electromagnetic screening casing of the present invention, it is made up of upper shell 1 and lower casing 2 bodies, and described upper shell 1 is conductive plastic material with lower house 2 and makes; Seam crossing at upper shell 1 and lower house 2 is provided with shield.Described shield can be made also and can be made by metal material by conductive plastic material.Described conductive plastic material is to have added metallic fiber in plastic rubber substrate, will be injection molded into upper shell or lower house after the conductive plastic material fusion, and metallic fiber is uniformly distributed in the plastic rubber substrate.Described plastic rubber substrate is polycarbonate, engineering plastics ABS, polyurethane, chliorinated polyvinyl chloride CPVC, rigid polyvinyl chloride PVC, polyethylene DPE, polypropylene PP, polysulfones PSU, polyformaldehyde POM, nylon, phenolic plastics PF, polyimides PI or epoxy resin plastics EP.Described metallic fiber is stainless steel wire, copper wire, iron wire, aluminium wire, copper alloy silk, aluminum-alloy wire, galvanized wire or zinc silk.
Shield is formed in that seam crossing is overlapping by upper shell 1 and lower house 2.A kind of scheme of shield is provided with inboard and lower house 2 overlapping the forming that overlapping muscle stretches into lower house 2 in upper shell 1 inboard; Second kind of scheme of shield is to stretch into the inboard and upper shell 1 overlapping the forming of upper shell 1 at the following overlapping muscle that lower house 2 inboards are provided with; The third scheme of shield is the combination of above two kinds of schemes.
Described overlapping muscle can be an independent part that is fixed on the upper shell 1; Overlapping muscle can be an independent part that is fixed on the lower house 2 down.
Described overlapping muscle can also be made one with upper shell 1; Overlapping muscle can be made one with lower house 2 down.
The specific embodiment of a kind of electromagnetic screening casing of the present invention as shown in Figure 1, it is made up of upper shell 1 and lower house 2; Upper shell 1 is conductive plastic material with lower house 2 and makes.
Wherein, the structure of lower house 2 is provided with overlapping muscle down as shown in Figure 2 on lower house 2, is specially and is provided with down preceding overlapping muscle 3 in front; Be provided with the overlapping muscle 4 of downside in two sides; After be provided with the down overlapping muscle 5 in back.Wherein, preceding down overlapping muscle 3 is made into integration by conductive plastic material with lower house 2 with the overlapping muscle 4 of downside; The overlapping muscle 5 in following back is an independent part, and its material is a metal, is fixed on the rear board 6 of lower house 2.
Wherein, the structure of upper shell 1 as shown in Figure 3, Fig. 4 is the partial schematic diagram that upper shell 1 combines with lower house 2 in the above-mentioned electromagnetic screening casing with Fig. 5, be provided with on the upper shell 1 some on the overlay region, the middle part that is specially in front is provided with the overlay region 7 of going forward, and overlaps shield with down preceding overlapping muscle 3; Be provided with upside overlay region 8 in two sides, overlap shield with the overlapping muscle 4 of downside; After be provided with overlay region 9, back, overlap shield with the following overlapping muscle 5 in back.
Certainly, in implementing design, also can establish overlapping muscle on the upper shell 1, and on lower house 2, set the overlay region.Can also as required these two kinds of schemes be combined employing.
Conductive plastic material among the embodiment adopts polycarbonate to add stainless steel wire more, and during injection moulding, stainless steel fibre is evenly distributed in the whole part, has formed the conductive network of an electromagnetic shielding, and its screening effectiveness can reach 20～60dB.But its sheet resistance is very big, has approximately more than 1000000 ohm, is similar to non-conductive.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1, a kind of electromagnetic screening casing, it is made up of upper shell and lower house, it is characterized in that, and described upper shell and lower house are conductive plastic material and make; Seam crossing at upper shell and lower house is provided with shield.
2, electromagnetic screening casing according to claim 1 is characterized in that, described shield can be made also and can be made by metal material by conductive plastic material.
3, electromagnetic screening casing according to claim 1 and 2, it is characterized in that, described conductive plastic material is to have added metallic fiber in plastic rubber substrate, will be injection molded into upper shell or lower house after the conductive plastic material fusion, and metallic fiber is uniformly distributed in the plastic rubber substrate.
4, electromagnetic screening casing according to claim 3, it is characterized in that described plastic rubber substrate is polycarbonate, engineering plastics ABS, polyurethane, chliorinated polyvinyl chloride CPVC, rigid polyvinyl chloride PVC, polyethylene DPE, polypropylene PP, polysulfones PSU, polyformaldehyde POM, nylon, phenolic plastics PF, polyimides PI or epoxy resin plastics EP.
5, electromagnetic screening casing according to claim 3 is characterized in that, described metallic fiber is stainless steel wire, copper wire, iron wire, aluminium wire, copper alloy silk, aluminum-alloy wire, galvanized wire or zinc silk.
6, electromagnetic screening casing according to claim 1 is characterized in that, described shield is formed in that seam crossing is overlapping by upper shell and lower house.
7, electromagnetic screening casing according to claim 6 is characterized in that:
Described shield is that the following overlay region that last overlapping muscle that the upper shell inboard is provided with stretches into the lower house inboard constitutes;
Perhaps,
Described shield is that the last overlay region that following overlapping muscle that the lower house inboard is provided with stretches into the upper shell inboard constitutes.
8, electromagnetic screening casing according to claim 6 is characterized in that:
Described shield is the following overlay region that last overlapping muscle that the upper shell inboard is provided with stretches into the lower house inboard, and the last overlay region that the following overlapping muscle that is provided with of lower house inboard stretches into the upper shell inboard constitutes;
Perhaps,
Described shield is the last overlay region that following overlapping muscle that the lower house inboard is provided with stretches into the upper shell inboard, and the following overlay region that the last overlapping muscle that is provided with of upper shell inboard stretches into the lower house inboard constitutes.
According to claim 7 or 8 described electromagnetic screening casings, it is characterized in that 9, described overlapping muscle or following overlapping muscle are fixed on upper shell or the lower house.
According to claim 7 or 8 described electromagnetic screening casings, it is characterized in that 10, described overlapping muscle or following overlapping muscle and upper shell or lower house are made one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510116688 CN1863450A (en) | 2005-10-27 | 2005-10-27 | Electromagnetic screening casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510116688 CN1863450A (en) | 2005-10-27 | 2005-10-27 | Electromagnetic screening casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1863450A true CN1863450A (en) | 2006-11-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510116688 Pending CN1863450A (en) | 2005-10-27 | 2005-10-27 | Electromagnetic screening casing |
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| Country | Link |
|---|---|
| CN (1) | CN1863450A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904442A (en) * | 2014-03-08 | 2014-07-02 | 东莞讯滔电子有限公司 | Cable connector assembly |
| CN106009482A (en) * | 2016-05-31 | 2016-10-12 | 苏州市奎克力电子科技有限公司 | Electromagnetic shielding material used for power supply equipment, and preparation method thereof |
| CN106547314A (en) * | 2015-09-23 | 2017-03-29 | 蓝色海洋（天津）工程技术有限公司 | A kind of conductive plasticss computer shield shell |
| CN109511256A (en) * | 2018-12-21 | 2019-03-22 | 安徽伟天机电设备有限公司 | A kind of means for anti-jamming of electromagnetic direct-drive device |
| CN110418562A (en) * | 2019-06-19 | 2019-11-05 | 华为技术有限公司 | A kind of shielding case and electronic equipment |
-
2005
- 2005-10-27 CN CN 200510116688 patent/CN1863450A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904442A (en) * | 2014-03-08 | 2014-07-02 | 东莞讯滔电子有限公司 | Cable connector assembly |
| CN106547314A (en) * | 2015-09-23 | 2017-03-29 | 蓝色海洋（天津）工程技术有限公司 | A kind of conductive plasticss computer shield shell |
| CN106009482A (en) * | 2016-05-31 | 2016-10-12 | 苏州市奎克力电子科技有限公司 | Electromagnetic shielding material used for power supply equipment, and preparation method thereof |
| CN109511256A (en) * | 2018-12-21 | 2019-03-22 | 安徽伟天机电设备有限公司 | A kind of means for anti-jamming of electromagnetic direct-drive device |
| CN110418562A (en) * | 2019-06-19 | 2019-11-05 | 华为技术有限公司 | A kind of shielding case and electronic equipment |
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