JP2000340981A - Electromagnetic shield cabinet and manufacture thereof - Google Patents
Electromagnetic shield cabinet and manufacture thereofInfo
- Publication number
- JP2000340981A JP2000340981A JP11153314A JP15331499A JP2000340981A JP 2000340981 A JP2000340981 A JP 2000340981A JP 11153314 A JP11153314 A JP 11153314A JP 15331499 A JP15331499 A JP 15331499A JP 2000340981 A JP2000340981 A JP 2000340981A
- Authority
- JP
- Japan
- Prior art keywords
- metal
- synthetic resin
- sheet
- electromagnetic wave
- wave shielding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 34
- 239000002184 metal Substances 0.000 claims abstract description 34
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 26
- 239000000057 synthetic resin Substances 0.000 claims abstract description 26
- 239000004745 nonwoven fabric Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 13
- 210000004209 hair Anatomy 0.000 claims description 7
- 239000004744 fabric Substances 0.000 abstract description 7
- 239000004020 conductor Substances 0.000 description 19
- 238000000465 moulding Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 239000012778 molding material Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電磁波シールド筐
体及びその製造方法に係り、特に筐体の開口端部に導電
性を有する金属等の不織布を成形することによりシャー
シヘアースがとれるようにしたものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave shielding housing and a method of manufacturing the same, and more particularly to a method of forming a chassis hair by forming a non-woven fabric such as a conductive metal at an opening end of the housing. It was done.
【０００２】[0002]
【従来の技術】従来、合成樹脂系シートの厚さ方向の中
心に導電性シートを積層したシート材を用いてスタンピ
ング成形するの各種の電磁波シールド筐体が提案されて
いる。また、この電磁波シールド筐体から発生する防害
電波の遮蔽効果を上げるためにアース機能を向上させた
ものとして、特開平５−３１５７８４号公報には防害電
磁波遮蔽成形品の製造方法が提案されている。2. Description of the Related Art Hitherto, various electromagnetic wave shielding casings have been proposed which are formed by stamping using a sheet material in which a conductive sheet is laminated at the center in the thickness direction of a synthetic resin sheet. Japanese Patent Application Laid-Open No. Hei 5-315784 proposes a method for manufacturing a molded product for shielding electromagnetic waves as an improved grounding function in order to enhance the shielding effect of the electromagnetic waves generated from the electromagnetic shielding case. ing.
【０００３】図４〜図５は、従来の防害電磁波遮蔽成形
品の製造方法に係る電磁波シールド筐体の断面図であ
り、図６〜図７は、これに使用するシート状導電体の斜
視図である。この電磁波シールド筐体の目的は、防害電
磁波の遮蔽に優れ、かつ筐体シヤ−シへのア−スも取れ
るようにしたものである。FIGS. 4 and 5 are cross-sectional views of a conventional electromagnetic shielding case according to a method of manufacturing a molded product for preventing harmful electromagnetic waves. FIGS. 6 and 7 are perspective views of a sheet-like conductor used for the case. FIG. The purpose of the electromagnetic wave shielding housing is to provide excellent shielding of the harmful electromagnetic waves and to provide an access to the housing chassis.
【０００４】次に、従来の電磁波シールド筐体につい
て、図４〜図５を参照して説明する。前記の電磁波シー
ルド筐体は、図４に示すように、電子機器装置等の筐体
シャーシ１２前面には、シート状合成樹脂材料より形成
した電磁波シールド筐体１１が実装されている。この電
磁波シールド筐体１１の構造は、凸凹状に加工し柔軟性
を備えたシート状導電体１４を介在させてある。さらに
凸凹状のシート状導電体１４は図５の如く、装置内側面
に凸状１４ａを露出させることにより、筐体シャーシ１
２とねじ１３で固定するだけでアースが取れるようにな
っている。Next, a conventional electromagnetic wave shielding case will be described with reference to FIGS. As shown in FIG. 4, the electromagnetic wave shielding housing has an electromagnetic wave shielding housing 11 made of a sheet-like synthetic resin material mounted on a front surface of a housing chassis 12 of an electronic apparatus or the like. In the structure of the electromagnetic wave shielding casing 11, a sheet-shaped conductor 14 which is processed into an uneven shape and has flexibility is interposed. Further, as shown in FIG. 5, the uneven sheet-shaped conductor 14 exposes the projection 14a on the inner surface of the apparatus, thereby forming the housing chassis 1
The ground can be obtained simply by fixing with the screw 2 and the screw 13.
【０００５】また、前記凸凹状のシート状導電体１４
は、導電性が良い銅、アルミニウム、ステンレス鋼等の
金属や、炭素繊維等を含む材料により構成される。ま
た、凸凹状のシート状導電体１４は、加熱成形等の成形
の際に延伸を受けるため、これに追随して伸長しうる伸
縮性を備えている必要があるが、一般にこれらの成形の
際の延伸倍率は浅い部分で１．１〜２倍程度、深い部分
で３〜４倍程度であるので、この点を考慮してシート状
導電体の伸縮性を付与させている。[0005] The uneven sheet-shaped conductor 14
Is made of a metal having good conductivity, such as copper, aluminum, and stainless steel, or a material containing carbon fiber or the like. In addition, since the uneven sheet-shaped conductor 14 is stretched at the time of molding such as heat molding, it is necessary that the sheet-shaped conductor 14 has elasticity so that the sheet-shaped conductor 14 can be stretched following the molding. Is about 1.1 to 2 times at a shallow part and about 3 to 4 times at a deep part. Considering this point, the stretchability of the sheet conductor is given.
【０００６】また、凸凹状のシート状導電体１４をシー
ト状合成樹脂成形材料に介在させる方法として、積層の
際に加熱または超音波で溶着する方法、接着剤で接着す
る方法、シートの押出成形時サンドイッチする方法が挙
げられている。この時図６のように角千鳥状に穴のあい
たシートの導電体１４ｂや図７の金属繊維のメッシュ状
のシート状導電体１４ｃを使用することにより、両面に
位置する合成樹脂材料が成形されたとき一部溶融して一
体化されることとなり、成形品の層間の強度が向上する
ので好ましいとしている。またシート状合成樹脂材料の
厚さは、２〜１０mm程度であるとしている。Further, as a method of interposing the uneven sheet-shaped conductor 14 in the sheet-shaped synthetic resin molding material, a method of heating or ultrasonic welding at the time of lamination, a method of bonding with an adhesive, and a method of sheet extrusion. Sometimes a method of sandwiching is mentioned. At this time, as shown in FIG. 6, the synthetic resin material located on both sides is formed by using the sheet conductor 14b having a zigzag hole and the mesh-shaped sheet conductor 14c of the metal fiber shown in FIG. In this case, it is preferred that the molten product is partially melted and integrated, thereby improving the strength between layers of the molded product. The thickness of the sheet-shaped synthetic resin material is about 2 to 10 mm.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、上述の
如く構成された電磁波シールド筐体は、凸凹状のシート
状導電体１４を備えたシート状合成樹脂成形材料を成形
するには、例えば、角千鳥状に穴のあいたシートの導電
体１４ｂとか、或いは金属繊維のメッシュ状のシート状
導電体１４ｃを予め凸凹状に加工しなければならず、こ
のような合成樹脂系の導電性シートは特殊な形態である
からコストが高くなるという問題点があった。また、凸
凹状のシート状導電体１４をシート状合成樹脂成形材料
と一体化させるには、積層の際に加熱または超音波で溶
着する方法、接着剤で接着する方法、シートの押出成形
時サンドイッチする方法を挙げているが、これらの方法
によって選られたシート状合成樹脂成形材料をスタンピ
ング成形して筐体とする場合、シート状導電体１４の凸
部が確実に面に露出せず完全なアースが取れないという
問題点もあった。また、箱形状に賦形する際にシート状
導電体１４が伸びにくいため破断もしくは皺が発生する
という問題点があった。However, in order to form a sheet-shaped synthetic resin molding material provided with the sheet-shaped conductors 14 having irregularities, for example, the electromagnetic wave shielding casing configured as described above is formed by, for example, staggered squares. The sheet-shaped conductor 14b with a hole in the shape or the mesh-shaped sheet conductor 14c of metal fiber must be processed in advance into an uneven shape. Such a synthetic resin-based conductive sheet has a special form. Therefore, there is a problem that the cost increases. Further, in order to integrate the uneven sheet-shaped conductor 14 with the sheet-shaped synthetic resin molding material, a method of heating or ultrasonic welding at the time of lamination, a method of bonding with an adhesive, a sandwich at the time of sheet extrusion molding, and the like. However, when the casing is formed by stamping and molding the sheet-like synthetic resin molding material selected by these methods, the protrusion of the sheet-like conductor 14 is not completely exposed without being exposed to the surface. There was also a problem that the ground could not be taken. In addition, there is a problem that the sheet-shaped conductor 14 is hardly stretched when formed into a box shape, and thus breaks or wrinkles occur.
【０００８】[0008]
【課題を解決するための手段】本発明は、市販の安価な
合成樹脂系の導電性シートを用いて電磁波シールド筐体
をスタンピング加工するに際して、筐体の開口端部に金
属不織布を成形インサート成形することにより、シャー
シヘアースがとれるようにした電磁波シールド筐体及び
その製造方法の提供を目的とすものである。SUMMARY OF THE INVENTION According to the present invention, when stamping an electromagnetic wave shielding case using a commercially available inexpensive synthetic resin-based conductive sheet, a metal nonwoven fabric is formed at the opening end of the case by insert molding. Accordingly, it is an object of the present invention to provide an electromagnetic wave shielding housing capable of removing chassis hairs and a method of manufacturing the same.
【０００９】すなわち、本願の第１の発明は、合成樹脂
系の導電性シート１ａを用いて形成した電磁波シールド
筐体の開口端部にをスタンピング加工するに際して、筐
体１の開口端部に導電性を有する金属等の不織布２を一
体的に設け、この金属等の不織布２の部分にてシャーシ
ヘアースがとれるようにしたことを特徴とする電磁波シ
ールド筐体である。That is, in the first invention of the present application, when the opening end of the electromagnetic wave shielding casing formed by using the synthetic resin-based conductive sheet 1a is stamped, the conductive end is applied to the opening end of the casing 1. An electromagnetic wave shielding housing characterized in that a nonwoven fabric 2 such as a metal having a property is integrally provided, and chassis hairs can be removed at a portion of the nonwoven fabric 2 such as a metal.
【００１０】また、第２の発明には、合成樹脂系の導電
性シート１ａを用いて電磁波シールド筐体をスタンピン
グ加工するに際して、金型内に合成樹脂系の導電性シー
ト１ａを配設すると共に導電性を有する金属等の不織布
２をインサートし、前記の合成樹脂系の導電性シート１
ａと金属等の不織布２が加熱された状態にてスタンピン
グ成形して筐体１の開口端部に金属等の不織布２を一体
的に成形し、この金属等の不織布２の部分にてシャーシ
ヘアースがとれるようにしたことを特徴とする電磁波シ
ールド筐体の製造方法である。According to a second aspect of the present invention, when the electromagnetic wave shielding casing is stamped by using the synthetic resin-based conductive sheet 1a, the synthetic resin-based conductive sheet 1a is provided in the mold. A nonwoven fabric 2 made of conductive metal or the like is inserted, and the synthetic resin-based conductive sheet 1 described above is inserted.
a and a non-woven fabric 2 such as metal is heated and stamped to form a non-woven fabric 2 such as a metal at the opening end of the housing 1 integrally. A method for manufacturing an electromagnetic wave shielding housing characterized in that
【００１１】[0011]
【発明の実施の形態】図１は、本発明の電磁波シールド
筐体の斜視図であり、図２は図１のＡ−Ａ断面図であ
る。本発明の電磁波シールド筐体は、合成樹脂系の導電
性シート１ａをスタンピング成形してなる筐体１の開口
端部に導電性を有する金属等の不織布２を一体的に設
け、この金属等の不織布２の部分にてシャーシヘアース
が取れるようにしたものである。FIG. 1 is a perspective view of an electromagnetic wave shielding housing of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. In the electromagnetic wave shielding casing of the present invention, a nonwoven fabric 2 made of a conductive metal or the like is integrally provided at an opening end of the casing 1 formed by stamping a synthetic resin-based conductive sheet 1a. Chassis hair can be removed from the nonwoven fabric 2.
【００１２】また、前記の合成樹脂系の導電性シート
（１ａ）は金属等の長繊維が分散された熱可塑性のシー
トである。The synthetic resin conductive sheet (1a) is a thermoplastic sheet in which long fibers such as metal are dispersed.
【００１３】また、前記の金属等の不織布２は、糸状の
金属等の繊維をニードリングしてプレスしたシート状の
ものであっても、棉状に束ねたものであってもよい。The non-woven fabric 2 made of metal or the like may be in the form of a sheet formed by needling and pressing fibers of a thread-like metal or the like, or may be made of a bundle of cotton.
【００１４】図３は、本発明に用いる金型の縦断面図で
あり、（Ａ）は成形前の状態を示し（Ｂ）は成形後の状
態を示している。凸状に形成されたコア型(下型)３は、
凸部３ａの根元部に金属不織布を嵌め込むための溝３ｂ
が設けられ、該溝３ｂには前期の金属不織布２がインサ
ートされるようになっている。また前記凸部３aの上面
には導電性シートを保持するための複数の針３ｃが植設
されている。４は凹状に形成されたキャビ型(上型)であ
る。FIG. 3 is a longitudinal sectional view of a mold used in the present invention, wherein (A) shows a state before molding and (B) shows a state after molding. The core mold (lower mold) 3 formed in a convex shape
Groove 3b for fitting a nonwoven metal fabric into the root of convex portion 3a
Are provided, and the metal nonwoven fabric 2 is inserted into the groove 3b. A plurality of needles 3c for holding the conductive sheet are implanted on the upper surface of the convex portion 3a. Reference numeral 4 denotes a cavity type (upper die) formed in a concave shape.
【００１５】次に、本発明に係る電磁波シールド筐体の
製造方法を説明する。 コア型３の溝３ｂには金属不織布のシート若しくは束
をインサートし、凸部aの上面には合成樹脂系の導電性
シートを配設する。 (加熱した状態で行うのか) 次に、キャビ型(上型)を下降させ、前記の合成樹脂系
の導電性シートと金属不織布が加熱された状態にてスタ
ンピング成形して筐体の開口端部に金属不織布を一体的
に成形する。Next, a method of manufacturing the electromagnetic wave shielding casing according to the present invention will be described. A sheet or bundle of metal nonwoven fabric is inserted into the groove 3b of the core mold 3, and a synthetic resin conductive sheet is provided on the upper surface of the convex portion a. (Whether the heating is performed) Next, the mold (upper die) is lowered, and the synthetic resin-based conductive sheet and the metal non-woven fabric are stamped and molded in a heated state to open the end of the housing. And a metal non-woven fabric is integrally formed.
【００１６】[0016]
【発明の効果】本発明は、安価な合成樹脂系の導電性シ
ートを用いて電磁波シールド筐体をスタンピング加工す
るに際して、筐体の開口端部に金属等の不織布を成形イ
ンサート成形した電磁波シールド筐体及びその製造方法
であるから、安価なコストで確実にシャーシヘアースを
取ることができる。According to the present invention, when stamping an electromagnetic wave shielding case using an inexpensive synthetic resin-based conductive sheet, a non-woven fabric such as metal is insert-molded at the opening end of the case. Because of the body and the method of manufacturing the same, chassis hair can be reliably removed at low cost.
【図１】 本発明の電磁波シールド筐体の斜視図。FIG. 1 is a perspective view of an electromagnetic wave shielding housing of the present invention.
【図２】 図１のＡ−Ａ断面図。FIG. 2 is a sectional view taken along line AA of FIG.
【図３】 本発明に用いる金型の縦断面図。FIG. 3 is a longitudinal sectional view of a mold used in the present invention.
【図４】 従来の電磁波シールド筐体の断面図。FIG. 4 is a cross-sectional view of a conventional electromagnetic wave shielding housing.
【図５】 図４のＢ部の拡大断面図。FIG. 5 is an enlarged sectional view of a portion B in FIG. 4;
【図６】 従来のシート状導電体の斜視図。FIG. 6 is a perspective view of a conventional sheet-shaped conductor.
【図７】 従来の他のシート状導電体の斜視図。FIG. 7 is a perspective view of another conventional sheet-shaped conductor.
１ 筐体 １ａ 導電性シート ２ 金属製等の不織布 ３ コア型 ３ａ 凸部 ３ｂ 溝 ３ｃ 針 ４ キャビ型 DESCRIPTION OF SYMBOLS 1 Housing 1a Conductive sheet 2 Nonwoven fabric of metal etc. 3 Core type 3a Convex part 3b Groove 3c Needle 4 Mold type
Claims (2)
て形成した電磁波シールド筐体の開口端部にをスタンピ
ング加工するに際して、筐体(１)の開口端部に導電性を
有する金属等の不織布(２)を一体的に設け、この金属等
の不織布(２)の部分にてシャーシヘアースがとれるよう
にしたことを特徴とする電磁波シールド筐体。When a stamping process is performed on an open end of an electromagnetic wave shielding housing formed using a synthetic resin conductive sheet (1a), a conductive metal is formed on the open end of the housing (1). An electromagnetic wave shielding casing characterized in that a nonwoven fabric (2) made of metal or the like is integrally provided so that chassis hairs can be removed at the portion of the nonwoven fabric (2) made of metal or the like.
て電磁波シールド筐体をスタンピング加工するに際し
て、金型内に合成樹脂系の導電性シートを配設すると共
に導電性を有する金属等の不織布(２)をインサートし、
前記の合成樹脂系の導電性シート（１ａ）と金属等の不
織布(２)を加熱された状態にてスタンピング成形して筐
体の開口端部に金属等の不織布(２)を一体的に成形し、
この金属等の不織布(２)の部分にてシャーシヘアースが
とれるようにしたことを特徴とする電磁波シールド筐体
の製造方法。2. When stamping an electromagnetic wave shielding casing using a synthetic resin-based conductive sheet (1a), a synthetic resin-based conductive sheet is provided in a mold and a metal or the like having conductivity. Insert the non-woven fabric (2)
The synthetic resin-based conductive sheet (1a) and the nonwoven fabric (2) such as a metal are stamped and molded in a heated state to integrally form the nonwoven fabric (2) such as a metal at the opening end of the housing. And
A method for manufacturing an electromagnetic wave shielding casing, wherein chassis hairs are removed at a portion of the nonwoven fabric (2) such as a metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15331499A JP3946381B2 (en) | 1999-06-01 | 1999-06-01 | Electromagnetic wave shielding casing and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15331499A JP3946381B2 (en) | 1999-06-01 | 1999-06-01 | Electromagnetic wave shielding casing and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000340981A true JP2000340981A (en) | 2000-12-08 |
| JP3946381B2 JP3946381B2 (en) | 2007-07-18 |
Family
ID=15559795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15331499A Expired - Fee Related JP3946381B2 (en) | 1999-06-01 | 1999-06-01 | Electromagnetic wave shielding casing and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3946381B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006157086A (en) * | 2004-11-25 | 2006-06-15 | Audio Technica Corp | Condenser microphone |
| JP2012035556A (en) * | 2010-08-10 | 2012-02-23 | Kurabo Ind Ltd | Conductive fiber-reinforced plastic, method for manufacturing the same, and electromagnetic wave shield material using the same |
-
1999
- 1999-06-01 JP JP15331499A patent/JP3946381B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006157086A (en) * | 2004-11-25 | 2006-06-15 | Audio Technica Corp | Condenser microphone |
| US7720239B2 (en) | 2004-11-25 | 2010-05-18 | Kabushiki Kaisha Audio-Technica | Capacitor microphone with acoustic resistor |
| JP4503421B2 (en) * | 2004-11-25 | 2010-07-14 | 株式会社オーディオテクニカ | Condenser microphone |
| JP2012035556A (en) * | 2010-08-10 | 2012-02-23 | Kurabo Ind Ltd | Conductive fiber-reinforced plastic, method for manufacturing the same, and electromagnetic wave shield material using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3946381B2 (en) | 2007-07-18 |
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