JP3062398U - Electromagnetic wave absorber - Google Patents
Electromagnetic wave absorberInfo
- Publication number
- JP3062398U JP3062398U JP1999001780U JP178099U JP3062398U JP 3062398 U JP3062398 U JP 3062398U JP 1999001780 U JP1999001780 U JP 1999001780U JP 178099 U JP178099 U JP 178099U JP 3062398 U JP3062398 U JP 3062398U
- Authority
- JP
- Japan
- Prior art keywords
- electromagnetic wave
- mobile phone
- wave absorber
- substrate portion
- powder
- 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.)
- Expired - Lifetime
Links
Landscapes
- Telephone Set Structure (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
(57)【要約】
【課題】 携帯電話機の電磁波を効果的に吸収する。
【解決手段】 アルミ又はアルミ合金からなる基板部２
と、この基板部２の表面の少なくとも一部に付着された
導電性の粉体３とを含む複合体４からなる。前記粉体３
の導電率は、前記基板部２の導電率と異なる。
(57) [Summary] [PROBLEMS] To effectively absorb electromagnetic waves from a mobile phone. SOLUTION: Substrate part 2 made of aluminum or aluminum alloy
And a conductive powder 3 attached to at least a part of the surface of the substrate portion 2. Powder 3
Is different from the conductivity of the substrate portion 2.
Description
【０００１】[0001]
本考案は、例えば携帯電話機等に好適に用いられる電磁波吸収体に関する。 The present invention relates to an electromagnetic wave absorber suitably used for, for example, a mobile phone.
【０００２】[0002]
携帯電話機などの各種無線機を始め、テレビ、ラジオなどの家電製品、さらに はコンピュータやコピー機等のＯＡ機器など、数多くの電気製品から電磁波が発 せられている。このような電磁波は、電気的な誤動作を引き起こしたり、また近 年では人体に悪影響を与える可能性があることが指摘されている。特に携帯電話 機は、受話口を耳（頭部）に押し当てて使用される傾向があるため、人体に接す る部分での電磁波の遮蔽が望まれる。 Electromagnetic waves are emitted from many electric appliances such as various wireless devices such as mobile phones, home appliances such as televisions and radios, and OA devices such as computers and copiers. It has been pointed out that such electromagnetic waves may cause electrical malfunctions and, in recent years, have harmful effects on the human body. In particular, mobile phones tend to be used with their earpieces pressed against their ears (head), so it is desirable to shield electromagnetic waves where they come into contact with the human body.
【０００３】 従来、携帯電話機の受話口に貼りつけることにより、該携帯電話機から発せら れる電磁波を吸収するものが提案されてはいるが、本考案者らの測定実験では、 未だ十分な効果が得られていないのが現状である。[0003] Conventionally, there has been proposed a device in which an electromagnetic wave emitted from the mobile phone is absorbed by being attached to an earpiece of the mobile phone. However, in the measurement experiments by the present inventors, a sufficient effect has not yet been obtained. At present it has not been obtained.
【０００４】 本考案は、以上のような問題点に鑑み案出なされたもので、アルミ又はアルミ 合金からなる基板部と、この基板部の表面の少なくとも一部に付着させた導電性 の粉体とを含む複合体を用いることを基本として、電磁波吸収効果を従来に増し て向上しうる例えば携帯電話機用に好適な電磁波吸収体を提供することを目的と している。The present invention has been made in view of the above problems, and has a substrate portion made of aluminum or an aluminum alloy, and a conductive powder adhered to at least a part of the surface of the substrate portion. It is an object of the present invention to provide an electromagnetic wave absorber suitable for a mobile phone, for example, which can improve the electromagnetic wave absorption effect more than before, based on the use of a composite including:
【０００５】[0005]
本考案のうち請求項１記載の考案は、アルミ又はアルミ合金からなる基板部と 、この基板部の表面の少なくとも一部に付着させた導電性の粉体とを具える複合 体を含むとともに、前記粉体の導電率が前記基板部の導電率と異なることを特徴 とする電磁波吸収体である。 The invention according to claim 1 of the present invention includes a composite including a substrate portion made of aluminum or an aluminum alloy, and a conductive powder attached to at least a part of the surface of the substrate portion, An electromagnetic wave absorber, wherein the conductivity of the powder is different from the conductivity of the substrate.
【０００６】 ここで、前記基板部は、表面が凹む凹部を少なくとも１つ以上具え、かつこの 凹部に、前記粉体を接着剤に混入して充填することができる。また前記粉体は、 例えばステライト合金を含み、かつ前記接着剤がカーボン接着剤であるのが望ま しい。Here, the substrate portion may include at least one concave portion having a concave surface, and the concave portion may be filled with the powder mixed with an adhesive. Preferably, the powder contains, for example, a stellite alloy, and the adhesive is a carbon adhesive.
【０００７】 また前記複合体は、一方の面に携帯電話機の受話口へ貼り付けしうる粘着シー トを配するとともに、他方の面に蓄光顔料を塗布した蓄光シートを介して透明の カバーを配することにより、携帯電話機用の電磁波吸収体として特に好適となる 。ここで、前記基板部及び粘着シートは、前記携帯電話機の受話口へと通じる孔 部を形成することにより、受話音が小さくなることが抑制される。Further, the composite has an adhesive sheet that can be attached to the earpiece of a mobile phone on one side, and a transparent cover via a luminous sheet coated with a luminous pigment on the other side. By doing so, it becomes particularly suitable as an electromagnetic wave absorber for a mobile phone. Here, the substrate portion and the adhesive sheet are formed with a hole that communicates with the earpiece of the mobile phone, so that the reception sound is suppressed from being reduced.
【０００８】[0008]
以下本考案の実施の一形態を図面に基づき説明する。 図１は本実施形態の電磁波吸収体１の分解斜視図、図２はその平面図、図３は 図２のＡ−Ａ断面図、図４はその使用例を示す斜視図をそれぞれ例示している。 本例の電磁波吸収体１は携帯電話機Ｐに好適に用いうるものが例示される。図に おいて電磁波吸収体１は、基板部２と、導電性の粉体３とを具える複合体４を含 む。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 is an exploded perspective view of the electromagnetic wave absorber 1 of the present embodiment, FIG. 2 is a plan view thereof, FIG. 3 is a sectional view taken along line AA of FIG. 2, and FIG. 4 is a perspective view showing an example of its use. I have. As the electromagnetic wave absorber 1 of this example, one that can be suitably used for the mobile phone P is exemplified. In the figure, an electromagnetic wave absorber 1 includes a composite 4 having a substrate portion 2 and a conductive powder 3.
【０００９】 前記基板部２は、導電率が高いアルミ又はアルミ合金から形成される。アルミ 合金としては、例えば炭素、亜鉛、ケイ素、マンガン、ニッケル、銅、クロム又 は鉛といった導電率の高い元素を１以上、好ましくは２以上、さらに好ましくは ３以上含ませることができる。ただし、例示の元素に限定されるものではない。 このようなアルミ又はアルミ合金は、低密度であるため基板部２を軽量化でき、 特に携帯電話機Ｐに取り付けて用いるのに好適であり、かつ加工も容易としうる 利点がある。The substrate 2 is made of aluminum or aluminum alloy having high conductivity. The aluminum alloy can contain one or more, preferably two or more, more preferably three or more elements having high conductivity such as carbon, zinc, silicon, manganese, nickel, copper, chromium or lead. However, it is not limited to the exemplified elements. Since such aluminum or aluminum alloy has a low density, the substrate portion 2 can be reduced in weight, and has an advantage that it is particularly suitable for use by being attached to the mobile phone P and can be easily processed.
【００１０】 本例の基板部２は、略楕円形をなす板状に形成されたものが示されている。こ の基板部２の最大厚さＴ（図３に示す）は、例えば１．５〜３．５mm、好ましく は２．０〜３．０mmであって、本例では約２．３mmとしている。また基板部２は 、本例では表面が凹んだ凹部２ａを基板部２の楕円長径軸上に沿って２つ形成さ れたものが例示される。The substrate portion 2 of the present embodiment is formed in a substantially elliptical plate shape. The maximum thickness T (shown in FIG. 3) of the substrate portion 2 is, for example, 1.5 to 3.5 mm, preferably 2.0 to 3.0 mm, and is about 2.3 mm in this example. Further, in this example, the substrate portion 2 is formed by forming two concave portions 2 a having a concave surface along the elliptical major axis of the substrate portion 2.
【００１１】 該凹部２ａは、本例では略円形をなし、その凹み量ｔ（図３に示す）が例えば １．５mm程度に設定される。また、本例では、基板部２の表面の一部、例えば前 記凹部２ａの底面などに、プレス、ショットブラスト等により、微細な凹凸面を 形成したものを例示している。また凹部２ａの直径は、例えば５〜１５mmに形成 されうる。ただし、これらの寸法は、必要に応じて種々変更しうるのは言うまで もない。また基板部２は、図５に示す如く、凹部２ａを基板部２の円周方向に連 続した周溝状に形成することもできる。The concave portion 2a has a substantially circular shape in the present embodiment, and the concave amount t (shown in FIG. 3) is set to, for example, about 1.5 mm. Further, in the present example, an example is shown in which a fine uneven surface is formed on a part of the surface of the substrate portion 2, for example, the bottom surface of the concave portion 2a by pressing, shot blasting, or the like. Further, the diameter of the concave portion 2a can be formed, for example, in the range of 5 to 15 mm. However, it is needless to say that these dimensions can be variously changed as necessary. Further, as shown in FIG. 5, the substrate portion 2 may be formed with a concave portion 2a in a circumferential groove shape continuous in the circumferential direction of the substrate portion 2.
【００１２】 前記導電性の粉体３は、本例ではカーボン接着剤の中に混入される。そしてこ の接着剤を基板部２の凹部２ａへと注入して固化させる。これによって、該基板 部２の表面の少なくとも一部に導電性の粉体３が付着し、基板部２と導電性の粉 体３とは電気的に導通させることが可能となる。また、本例のように接着剤自体 が導電性を有するときには、該接着剤の固化物全体に導電性が確保される点で特 に好ましい。なお前記カーボン接着剤に代えて、種々の導電性接着剤が採用でき る。さらに、各種の樹脂等に導電性の粉体３を混合して前記凹部２ａへと充填す ることでも良いし、また基板部２に凹部２ａを形成することなしに、導電性の粉 体３を混入した接着剤を基板部２の表面に直接塗布することも可能である。In the present embodiment, the conductive powder 3 is mixed in a carbon adhesive. Then, this adhesive is injected into the concave portion 2a of the substrate portion 2 and solidified. As a result, the conductive powder 3 adheres to at least a part of the surface of the substrate 2, and the substrate 2 and the conductive powder 3 can be electrically conducted. Further, when the adhesive itself has conductivity as in this example, it is particularly preferable in that conductivity is secured in the entire solidified product of the adhesive. Note that various conductive adhesives can be used instead of the carbon adhesive. Further, the conductive powder 3 may be mixed with various kinds of resin or the like and filled in the concave portion 2a, or the conductive powder 3 may be formed without forming the concave portion 2a in the substrate portion 2. It is also possible to directly apply the adhesive mixed with to the surface of the substrate unit 2.
【００１３】 また導電性の粉体３には、前記基板部２の導電率と異なるものであれば種々の ものを採用することができる。このような導電性の粉体３としては、例えばフェ ライト粉、カーボン粉、金属粉などの１種以上が好ましいが、金属粉であるとき には、例えばステンレス粉（例えばＳＵＳ３１６ＬＣなど）、ステライト合金粉 などを含むことが望ましい。本例では、該粉体３には、導電率が前記基板部２よ りも小のものが採用される。なお導電性の粉体３の粒径は、特に限定されないが 、例えば２．０〜５．０μｍ、好ましくは１０〜３０μｍとするのが望ましく、 また接着剤１００重量部に対して例えば、２００〜３００重量部程度配合させる のが好ましい。As the conductive powder 3, various powders may be used as long as the powder has a different conductivity from the substrate portion 2. As such conductive powder 3, for example, one or more of ferrite powder, carbon powder, metal powder and the like are preferable, and when it is metal powder, for example, stainless powder (for example, SUS316LC), stellite alloy It is desirable to include powder. In this embodiment, the powder 3 has a conductivity lower than that of the substrate portion 2. The particle size of the conductive powder 3 is not particularly limited, but is preferably, for example, 2.0 to 5.0 μm, and more preferably 10 to 30 μm. It is preferable to add about 300 parts by weight.
【００１４】 さらに、本実施形態の複合体４は、一方の面、本例では前記凹部２ａが形成さ れていない面に携帯電話機Ｐの受話口Ｈを含んで近傍へ貼り付けしうる粘着シー ト５が接着されている。また複合体４の他方の面には、蓄光顔料６ｂを塗布した 蓄光シート６を介して軟質かつ透明のカバー７を配したものが例示されている。Further, the composite 4 of the present embodiment has an adhesive sheet that can be pasted on one surface, in this example, the surface where the concave portion 2a is not formed, including the earpiece H of the mobile phone P. 5 is adhered. On the other surface of the composite 4, a soft and transparent cover 7 is arranged via a phosphorescent sheet 6 coated with a phosphorescent pigment 6b.
【００１５】 前記粘着シート５は、例えば両面粘着シートであって、携帯電話機Ｐの受話口 からの音声が遮られないよう、例えばこの受話口Ｈへと通じる孔部５ａが形成さ れるのが好ましく、本例では孔部５ａとして粘着シート５の周縁から中央にむけ てのびる切り込みが形成されたものを例示している。同様に、前記基板部２には 、前記携帯電話機Ｐの受話口Ｈへと通じる貫通した開口２ｂが形成され、前記粘 着シート５の孔部５ａと連通するものを例示している。The pressure-sensitive adhesive sheet 5 is, for example, a double-sided pressure-sensitive adhesive sheet, and is preferably formed with, for example, a hole 5a communicating with the earpiece H so that sound from the earpiece of the mobile phone P is not blocked. In this example, the hole 5a is formed by forming a cut extending from the periphery of the adhesive sheet 5 to the center thereof. Similarly, the substrate portion 2 is formed with an opening 2b penetrating to the earpiece H of the mobile phone P, and communicates with the hole 5a of the adhesive sheet 5.
【００１６】 前記蓄光シート６は、本例では塩化ビニルシート６ａの表面に蓄光顔料６ｂが 塗布されたものを示す。蓄光顔料６ｂとしては、例えばアルミン酸ストロンチウ ムが好適である（例えば根本特殊科学（株）製「ルミノーバ」等）。このような 蓄光顔料６ｂは、蛍光灯ないし自然光に数分間照射した場合、約２〜１０時間と いった長時間の発光能力を具えるため特に好ましいものとなる。また、無害、無 公害で耐候性、耐光性にも優れる利点がある。また蓄光顔料６ｂの発光色は適宜 定めうる。なお蓄光顔料６ｂも例示の顔料に限定されず、種々のものが採用でき 、さらにはこの蓄光シート６にキャラクタ模様、イラスト、マークなど種々のデ ザインを付すこともできる。なお蓄光シート６の顔料塗布面は、前記カバー７に 向けて配置される。In the present embodiment, the luminous sheet 6 has a luminous pigment 6b applied to the surface of a vinyl chloride sheet 6a. As the phosphorescent pigment 6b, for example, strontium aluminate is suitable (for example, "Luminova" manufactured by Nemoto Special Science Co., Ltd.). Such a phosphorescent pigment 6b is particularly preferable because it has a long-term light emission ability of about 2 to 10 hours when irradiated with a fluorescent lamp or natural light for several minutes. It also has the advantage of being harmless, pollution-free, and excellent in weather resistance and light resistance. The luminescent color of the luminous pigment 6b can be determined as appropriate. The luminous pigment 6b is not limited to the exemplified pigments, but various pigments can be employed. Further, various designs such as character patterns, illustrations, and marks can be provided on the luminous sheet 6. The pigment-coated surface of the phosphorescent sheet 6 is disposed facing the cover 7.
【００１７】 前記カバー７は、本例では複合体４の前記他方の面の略全域を覆うことにより 、耳（頭部）が直接、複合体４と接触するのを防止でき、また弾力のある軟質を なすため、耳（頭部）などの損傷を効果的に防止しうる。さらにカバー７は、透 明であるため、光が前記蓄光シート６に到達すること及び該蓄光シート６から発 せられる光の透過を阻害することもない。このようなカバー７は、例えば軟質の エポキシ樹脂などが好適に採用される。In the present embodiment, the cover 7 covers substantially the entire surface of the other surface of the complex 4 so that the ear (head) can be prevented from directly contacting the complex 4 and has elasticity. Because it is soft, it can effectively prevent damage to the ears (head). Further, since the cover 7 is transparent, the light does not reach the phosphorescent sheet 6 and does not hinder the transmission of the light emitted from the phosphorescent sheet 6. Such a cover 7 is preferably made of, for example, a soft epoxy resin.
【００１８】 以上のような電磁波吸収体１は、図４に示した如く、携帯電話機Ｐの受話口Ｈ 近傍に前記粘着シート５で貼りつけされて使用される。そして、携帯電話機Ｐの 前記受話口Ｈから漏れ出る電磁波（例えば８００ＭHz〜１．５ＧHz程度）は、先 ず前記複合体４の基板部２によって反射され、頭部への照射が防止される。また 、本例では前記基板部２に、微細な凹凸面を含む凹部２ａを設けたことにより、 反射する波動が互いに打ち消し合う干渉効果が生まれ電磁波の吸収効果がより高 められる。また電磁波の一部の電界や磁界は、複合体４の内部を通過する際に複 合体４を物理的に振動させ熱エネルギーに変換されて消費されたり、或いは導電 率が非常に高いアルミないしアルミ合金からなる基体部４における渦電流損失な どによって電気エネルギーに変換されて消費ないし外部に放出される。特に基板 部２とこれに付着する粉体３との導電率の差を利用して電磁波は効果的に吸収さ れる。このように、本実施形態の携帯電話機用の電磁波吸収体１は、受話口Ｈか ら頭部へと放射される電磁波を効果的に減衰できる。The electromagnetic wave absorber 1 as described above is used by being adhered to the vicinity of the earpiece H of the mobile phone P with the adhesive sheet 5 as shown in FIG. Then, the electromagnetic waves (for example, about 800 MHz to 1.5 GHz) leaking from the earpiece H of the mobile phone P are first reflected by the substrate unit 2 of the complex 4 to prevent irradiation to the head. Further, in the present embodiment, the concave portion 2a including the fine uneven surface is provided in the substrate portion 2, so that an interference effect that the reflected waves cancel each other is generated, and the electromagnetic wave absorbing effect is further enhanced. Also, some electric and magnetic fields of the electromagnetic waves are converted into heat energy by physically vibrating the complex 4 when passing through the inside of the complex 4 and are consumed, or aluminum or aluminum having a very high conductivity is used. The energy is converted into electric energy by eddy current loss in the base portion 4 made of the alloy and consumed or discharged to the outside. In particular, the electromagnetic wave is effectively absorbed by utilizing the difference in electric conductivity between the substrate portion 2 and the powder 3 attached thereto. As described above, the electromagnetic wave absorber 1 for the mobile phone of the present embodiment can effectively attenuate the electromagnetic wave radiated from the earpiece H to the head.
【００１９】 また、昼間の携帯電話機Ｐの使用時には、透明な前記カバー７を介して光が蓄 光シート６に照射されるため、前記蓄光顔料６ｂが蓄光する。従って、夜間など の暗がりでも蓄光シート６が発光しうる。このため、例えば暗がりなどでも蓄光 シート６の発光により、携帯電話機の所在を容易に確認しうる。When the mobile phone P is used in the daytime, light is applied to the luminous sheet 6 through the transparent cover 7, so that the luminous pigment 6b luminesces. Therefore, the phosphorescent sheet 6 can emit light even in darkness such as at night. For this reason, the location of the mobile phone can be easily confirmed by the light emission of the luminous sheet 6 even in the dark, for example.
【００２０】 以上、本考案の実施形態を携帯電話機用のものを例に取り説明したが、これ以 外にも例えばテレビ、パソコンなど各種の電気製品についても同様に適用するこ とができる。Although the embodiment of the present invention has been described by taking a mobile phone as an example, the present invention can be similarly applied to various electric appliances such as a television and a personal computer.
【００２１】[0021]
本考案の効果を確認するために、図６に示すように、携帯電話機Ｐ（使用周波 数１．５ＧHz）のアンテナ部１０を電磁波測定装置Ｍ（独ワンデル＆ウォルタマ イス社製ＥＭＲ１１）に対向して配置し電磁波吸収効果を確認した。先ず携帯電 話機Ｐのアンテナ部１０の先端と測定装置Ｍとの間の水平距離Ｌ１を２５mmとし 、本考案を使用しないときの携帯電話着信時の電磁波の電界強度と、本考案品を 使用したときの携帯電話着信時の電磁波の電界強度とをそれぞれ１００回測定し 、最大値、最小値から５％の範囲を除いた値の平均値として表示した。なお本考 案品は、上記実施形態で説明した基本構造を有し、携帯電話機Ｐと測定装置Ｍと の間かつアンテナ部１０から５mmの距離Ｌ２を隔てた位置に設置した。また市販 されている他社の従来品Ａ、Ｂについても同様にテストを行った。 テストの結果を表１に示す。 In order to confirm the effect of the present invention, as shown in FIG. 6, the antenna unit 10 of the mobile phone P (operating frequency: 1.5 GHz) is opposed to the electromagnetic wave measuring device M (EMR11 manufactured by Wander & Waltamais, Germany). To confirm the electromagnetic wave absorption effect. First, the horizontal distance L1 between the tip of the antenna unit 10 of the mobile phone P and the measuring device M was set to 25 mm, and the electric field strength of the electromagnetic wave when the mobile phone arrived when the present invention was not used and the product of the present invention were used. The electric field intensity of the electromagnetic wave at the time of the arrival of the mobile phone at that time was measured 100 times, and displayed as an average value excluding the range of 5% from the maximum value and the minimum value. The product of the present invention has the basic structure described in the above embodiment, and is installed at a position between the mobile phone P and the measuring device M and at a distance L2 of 5 mm from the antenna unit 10. The same test was performed on conventional products A and B of other companies that are commercially available. Table 1 shows the test results.
【００２２】[0022]
【表１】 [Table 1]
【００２３】 テストの結果、本考案品では、従来品に比べて電界強度を大幅に低減している ことが確認できる。また電磁波の磁界強度の測定値（Ａ／ｍ）についても、ほぼ これと同様の結果が得られた。また本考案品を装着した携帯電話機を使用して通 話したところ、本考案品の非装着時と比べてノイズ、受信状態などについては全 く問題がなかった。As a result of the test, it can be confirmed that the product of the present invention greatly reduces the electric field intensity as compared with the conventional product. The measured value (A / m) of the magnetic field intensity of the electromagnetic wave also obtained almost the same result. In addition, when a call was made using a mobile phone equipped with the product of the present invention, there was no problem with respect to noise, reception status, etc. as compared to when the product of the present invention was not used.
【００２４】[0024]
上述したように、本考案では、上述のような新規の複合体からなるため、携帯 電話機用として特に効果の高い電磁波吸収体を提供しうる。また複合体に蓄光顔 料を塗布したシート体を介して軟質透明樹脂カバーを配したときには、該顔料が 夜間でも発光しうるため、携帯電話機を探す手間を削減しうる。 As described above, in the present invention, since the present invention is made of the novel composite as described above, it is possible to provide an electromagnetic wave absorber particularly effective for a mobile phone. Further, when a soft transparent resin cover is provided via a sheet body coated with a phosphorescent pigment on the composite, the pigment can emit light even at night, so that the trouble of searching for a mobile phone can be reduced.
【図１】本実施形態の一実施形態を示す分解斜視図であ
る。FIG. 1 is an exploded perspective view showing one embodiment of the present embodiment.
【図２】その平面図である。FIG. 2 is a plan view thereof.
【図３】図２のＡ−Ａ断面図である。FIG. 3 is a sectional view taken along line AA of FIG. 2;
【図４】本実施形態の使用例を示す斜視図である。FIG. 4 is a perspective view showing a usage example of the embodiment.
【図５】基板部の他の実施形態を示す斜視図である。FIG. 5 is a perspective view showing another embodiment of the substrate unit.
【図６】電界強度測定方法を説明する線図である。FIG. 6 is a diagram illustrating an electric field strength measuring method.
１ 電磁波吸収体 ２ 基板部 ２ａ 凹部 ２ｂ 開口 ３ 導電性の粉体 ４ 複合体 ５ 粘着シート体 ６ 蓄光シート ７ カバー Ｐ 携帯電話機 DESCRIPTION OF SYMBOLS 1 Electromagnetic wave absorber 2 Substrate part 2a Depression 2b Opening 3 Conductive powder 4 Composite 5 Adhesive sheet 6 Light storage sheet 7 Cover P Mobile phone
Claims (5)
この基板部の表面の少なくとも一部に付着させた導電性
の粉体とを具える複合体を含むとともに、 前記粉体の導電率が前記基板部の導電率と異なることを
特徴とする電磁波吸収体。A substrate portion made of aluminum or an aluminum alloy;
An electromagnetic wave absorber, comprising a composite comprising a conductive powder adhered to at least a part of the surface of the substrate portion, and a conductivity of the powder being different from a conductivity of the substrate portion. body.
も１つ以上具え、かつこの凹部に、前記粉体を接着剤に
混入して充填してなる請求項１記載の電磁波吸収体。2. The electromagnetic wave absorber according to claim 1, wherein said substrate portion has at least one concave portion having a concave surface, and said concave portion is filled with said powder mixed with an adhesive.
前記接着剤がカーボン接着剤である請求項２記載の電磁
波吸収体。3. The electromagnetic wave absorber according to claim 2, wherein said powder contains a stellite alloy, and said adhesive is a carbon adhesive.
話口へ貼り付けしうる粘着シートを配するとともに、 他方の面に蓄光顔料を塗布した蓄光シートを介して透明
のカバーを配してなる請求項３に記載の携帯電話機用の
電磁波吸収体。4. The composite has a pressure-sensitive adhesive sheet that can be attached to the earpiece of a mobile phone on one side, and a transparent cover on the other side via a luminous sheet coated with a luminous pigment. The electromagnetic wave absorber for a mobile phone according to claim 3, wherein
話機の受話口へと通じる孔部が形成されてなる請求項４
記載の携帯電話用の電磁波吸収体。5. The substrate and the pressure-sensitive adhesive sheet are formed with a hole communicating with an earpiece of the mobile phone.
An electromagnetic wave absorber for a mobile phone as described in the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1999001780U JP3062398U (en) | 1999-03-24 | 1999-03-24 | Electromagnetic wave absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1999001780U JP3062398U (en) | 1999-03-24 | 1999-03-24 | Electromagnetic wave absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP3062398U true JP3062398U (en) | 1999-10-08 |
Family
ID=43196144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1999001780U Expired - Lifetime JP3062398U (en) | 1999-03-24 | 1999-03-24 | Electromagnetic wave absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3062398U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018060862A (en) * | 2016-10-03 | 2018-04-12 | 大同特殊鋼株式会社 | Thin film-like electromagnetic wave absorber, ghz-band electromagnetic wave decoupling sheet and manufacturing method therefor |
-
1999
- 1999-03-24 JP JP1999001780U patent/JP3062398U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018060862A (en) * | 2016-10-03 | 2018-04-12 | 大同特殊鋼株式会社 | Thin film-like electromagnetic wave absorber, ghz-band electromagnetic wave decoupling sheet and manufacturing method therefor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100782512B1 (en) | Mobile terminal for improving specification absorption rate | |
| CA2729062C (en) | Microstrip antenna for electromagnetic radiation dissipation device | |
| US20070259704A1 (en) | Mobile phone receiving bag for shielding electromagnetic wave | |
| JPH10145898A (en) | Wireless communication equipment | |
| EP1220458A3 (en) | Portable telephone | |
| WO2008008078A1 (en) | Method and device for reducing exposure to undesirable electromagnetic radiation | |
| US6314277B1 (en) | Electromagnetic radiation protection device of a mobile phone | |
| JP2017045743A (en) | Electromagnetic wave shielding material for small-sized electronic apparatus | |
| US7084819B2 (en) | Passive reflector for a mobile communication device | |
| KR101200051B1 (en) | Film for shielding electromagnetic wave of mobile phone | |
| JP3062398U (en) | Electromagnetic wave absorber | |
| CN208173797U (en) | A kind of antenna module and terminal device | |
| CN102006766A (en) | Mobile terminal and method for reducing electromagnetic wave energy absorption ratio thereof | |
| RU128790U1 (en) | PROTECTIVE SCREEN TO REDUCE THE LEVEL OF MICROWAVE RADIATION OF CELL PHONES | |
| EP0915572A1 (en) | Shielding system for mobile and radio telephones | |
| KR100340040B1 (en) | The projecting case of mobile phone | |
| US20130099956A1 (en) | Apparatus to reduce specific absorption rate | |
| US7034772B2 (en) | Flexible multi-cladded metallic tape for forming parabolic shaped magnetic field and energy deflecting devices | |
| CN210609322U (en) | Mobile phone casing | |
| WO2003028424A1 (en) | Shielding method and device | |
| JP3021316B2 (en) | Unwanted electromagnetic wave absorption structure of mobile phone | |
| US20020093455A1 (en) | Hand-held radio-frequency transceiver particularly useful as a cellular telephone handset | |
| JP3080785U (en) | Electromagnetic wave absorption and attenuation structure for mobile phones | |
| JP3036348U (en) | Electromagnetic wave shield for wireless telephone | |
| JP3077957U (en) | Mobile phone electromagnetic wave attenuation and absorption plate |