【０００１】[0001]
【発明の属する技術分野】本発明は、携帯電話機やポケ
ットベルなどの携帯情報機器に関し、さらに詳しくは磁
石を備えた電子部品の磁気を遮蔽する方法を備えた磁気
遮蔽装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable information device such as a portable telephone or a pager, and more particularly to a magnetic shielding device provided with a method for shielding the magnetism of an electronic component having a magnet.
【０００２】[0002]
【従来の技術】従来、磁石を備えた電子部品が搭載され
た携帯情報機器として、例えば図４に示されるような携
帯電話機がある。プリント基板43の表面側に音声を出力
する受話器44が設けられ、裏面側にはシールドケース45
の内側に無線回路部46が形成されるようにした構成は例
えば特開平10−126070号公報にて開示されている。2. Description of the Related Art Conventionally, as a portable information device on which an electronic component having a magnet is mounted, for example, there is a portable telephone as shown in FIG. A receiver 44 for outputting sound is provided on the front side of the printed circuit board 43, and a shield case 45 is provided on the back side.
The configuration in which the wireless circuit section 46 is formed inside the device is disclosed, for example, in Japanese Patent Application Laid-Open No. 10-126070.
【０００３】図７は、上記に示した受話器44、無線回路
46、プリント基板43およびシールドケース45のそれぞれ
の位置関係を示した一部拡大した分解斜視図である。FIG. 7 shows a receiver 44 and a radio circuit shown above.
FIG. 4 is a partially enlarged exploded perspective view showing a positional relationship between a printed circuit board 46, a printed circuit board 43, and a shield case 45.
【０００４】図６は、無線回路46の一般的な回路構成を
示すものである。図６に示されるように無線回路46は、
共用器47、アイソレータ48、送信部49、変調部50、送話
部51、受信部52、復調部53、受話部(図番なし)、制御部
(図番なし)を備え、これに関連して送話器54、アンテナ
55、受話器44が設けられている。FIG. 6 shows a general circuit configuration of the radio circuit 46. As shown in FIG. 6, the wireless circuit 46
Duplexer 47, isolator 48, transmitting unit 49, modulating unit 50, transmitting unit 51, receiving unit 52, demodulating unit 53, receiving unit (no figure number), control unit
(No figure number), in connection with this, the transmitter 54, antenna
55, a receiver 44 is provided.
【０００５】次に動作について説明する。送話器54に加
えられた音声は電気信号に変換され、送話部51で増幅さ
れた後、変調部50で送信波に重畳され、アイソレータ4
8、共用器47を通過し、アンテナ55から放射される。Next, the operation will be described. The sound applied to the transmitter 54 is converted into an electric signal, amplified by the transmitter 51, and then superimposed on the transmission wave by the modulator 50.
8. It passes through the duplexer 47 and is radiated from the antenna 55.
【０００６】また、アンテナ55で受信された受信波は、
共用器47を通過後、受信部52で増幅され、復調部53で受
信波を復調して受話部(図番なし)で増幅してから受話器
44で音声に変換される。The received wave received by the antenna 55 is
After passing through the duplexer 47, the signal is amplified by the receiver 52, the received wave is demodulated by the demodulator 53, amplified by the receiver (not shown), and then
It is converted to voice at 44.
【０００７】図５は、受話器44近傍の部分拡大図であ
る。図５において受話器44は、振動板19、振動板19に固
着されたコイル20、コイル20の内側に配設された円盤状
磁石21、円盤状磁石21を保持するヨーク22、磁石を保持
するヨーク22とともにフレーム23と蓋24、外部に突出し
た一対のリード線57とから構成され、上ケース１に対
し、受話器クッション26が所定量圧縮されて組付けられ
る。FIG. 5 is a partially enlarged view of the vicinity of the receiver 44. In FIG. 5, a receiver 44 includes a diaphragm 19, a coil 20 fixed to the diaphragm 19, a disk-shaped magnet 21 disposed inside the coil 20, a yoke 22 for holding the disk-shaped magnet 21, and a yoke for holding the magnet. 22, the frame 23, the lid 24, and a pair of lead wires 57 protruding outside are formed. The receiver cushion 26 is compressed and assembled to the upper case 1 by a predetermined amount.
【０００８】円盤状磁石21はヨーク22と対向する面にＳ
極が、この反対面にＮ極が着磁されており、また、アイ
ソレータ48と受話器44とは平面的に重畳しないようにな
っている。The disk-shaped magnet 21 has a surface S facing the yoke 22.
The pole is N-pole magnetized on the opposite surface, and the isolator 48 and the receiver 44 do not overlap in a plane.
【０００９】ここにおいて受話器44の円盤状磁石21はフ
レミングの左手の法則を利用して振動板19を起振させ、
また、アイソレータ48の磁石もファラデー効果を利用し
た単向管作用をさせるようにしている。Here, the disk-shaped magnet 21 of the receiver 44 causes the diaphragm 19 to vibrate using Fleming's left-hand rule.
Also, the magnet of the isolator 48 is designed to have a unidirectional tube action utilizing the Faraday effect.
【００１０】[0010]
【発明が解決しようとする課題】このように、受話器44
とアイソレータ48はともに磁石を有しており、外部から
磁界の影響を受けると各々性能の劣化を招くため、プリ
ント基板43を挟んで配置した場合、重畳しないように所
定量離隔させなければならなかった。または、表面実装
しない受話器44をプリント基板43より離れる方向に設
け、両者の磁界中に夫々配置されないようにしなければ
ならなかった。As described above, the receiver 44
Both the isolator 48 and the isolator 48 have magnets, and when subjected to the influence of a magnetic field from the outside, the performance is deteriorated.Therefore, when the printed circuit board 43 is interposed, it must be separated by a predetermined amount so as not to overlap. Was. Alternatively, the receiver 44 that is not surface-mounted must be provided in a direction away from the printed circuit board 43 so as not to be disposed in the magnetic fields of the two.
【００１１】そのため、機器の厚みを厚くさせたり、或
いはアイソレータ48の実装位置に制約を受け、このアイ
ソレータ48を覆うシールドケース45の大型化を招くな
ど、機器の小型化を妨げていた。Therefore, the thickness of the device is increased, or the mounting position of the isolator 48 is restricted, so that the size of the shield case 45 covering the isolator 48 is increased.
【００１２】本発明は、上記問題点に鑑みてなされたも
のであり、その目的とするところは、第１または第２の
磁石の磁力がプリント基板の通過を防ぐための磁気遮蔽
手段を設けるようにして、如何なる位置に磁石を有する
電子部品を設けてもこの磁石の劣化を招かないようにし
て設計制約を排除し、機器の小型、薄型化を図ることが
できる磁気遮蔽装置を提供することにある。The present invention has been made in view of the above problems, and has as its object to provide magnetic shielding means for preventing the magnetic force of the first or second magnet from passing through a printed circuit board. Accordingly, it is desirable to provide a magnetic shielding device which can prevent the degradation of the magnet even when an electronic component having the magnet is provided at any position, eliminate design constraints, and reduce the size and thickness of the device. is there.
【００１３】[0013]
【課題を解決するための手段】上記目的を達成するため
に本発明における請求項１記載の発明は、プリント基板
と、このプリント基板を挟むように設けられ、第１と第
２の磁石を有する第１と第２の電子部品とを備え、前記
第１と第２の電子部品との間に磁気遮蔽手段を配設した
ものである。Means for Solving the Problems In order to achieve the above object, the present invention according to claim 1 of the present invention comprises a printed board, and a first and a second magnet provided so as to sandwich the printed board. It has first and second electronic components, and magnetic shielding means is disposed between the first and second electronic components.
【００１４】従って、請求項１記載の発明によれば、第
１または第２の磁石の磁力がプリント基板の通過を防ぐ
ことができるという作用を有する。Therefore, according to the first aspect of the present invention, there is an effect that the magnetic force of the first or second magnet can be prevented from passing through the printed circuit board.
【００１５】また、請求項２記載の発明は、プリント基
板と、このプリント基板の一方の面に実装された第１の
磁石を有した第１の電子部品(アイソレータ)と、プリン
ト基板の他方の面側に設けられ、第２の磁石を有した第
２の電子部品(受話器)とを備え、前記プリント基板と前
記第２の電子部品(受話器)との間に磁気遮蔽手段を配設
したものである。According to a second aspect of the present invention, there is provided a printed circuit board, a first electronic component (isolator) having a first magnet mounted on one surface of the printed circuit board, and the other of the printed circuit board. A second electronic component (receiver) provided on the surface side and having a second magnet, wherein magnetic shielding means is disposed between the printed circuit board and the second electronic component (receiver). It is.
【００１６】従って、請求項２記載の発明によれば、ア
イソレータまたは受話器の磁石の磁力がプリント基板の
通過を防ぐことができるという作用を有する。Therefore, according to the second aspect of the present invention, the magnetic force of the magnet of the isolator or the handset can be prevented from passing through the printed circuit board.
【００１７】また、請求項３記載の発明は、プリント基
板と、このプリント基板の一方の面に実装され、磁石を
有した第１の電子部品(アイソレータ)と、前記プリント
基板の他方の面側に設けられ、磁石を有した第２の電子
部品(受話器)と、前記第２の電子部品(受話器)を保持し
磁性体で形成された保持部材とを備え、前記プリント基
板と前記第２の電子部品(受話器)をとの間に前記保持部
材を配設したものである。According to a third aspect of the present invention, there is provided a printed circuit board, a first electronic component (isolator) mounted on one surface of the printed circuit board and having a magnet, and a second side of the printed circuit board on the other side. A second electronic component (receiver) having a magnet, and a holding member formed of a magnetic material that holds the second electronic component (receiver), and that the printed circuit board and the second The holding member is disposed between the electronic component (handset) and the electronic component.
【００１８】従って、請求項３記載の発明によれば、特
別な磁気遮蔽部材を設けなくとも受話器を保持する保持
部材を磁性体で形成するだけで、アイソレータまたは受
話器の磁石の磁力がプリント基板の通過を防ぐことがで
きるという作用を有する。Therefore, according to the third aspect of the present invention, the magnetic force of the magnet of the isolator or the receiver can be reduced by simply forming the holding member for holding the receiver with a magnetic material without providing a special magnetic shielding member. It has the effect of preventing passage.
【００１９】また、請求項４記載の発明は、プリント基
板と、このプリント基板の一方の面に実装された第１の
磁石を有した第１の電子部品(アイソレータ)と、前記プ
リント基板の他方の面側に設けられた第２の磁石を有し
た第２の電子部品(受話器)と、この第２の電子部品(受
話器)を保持する磁性体で形成された保持部材と、前記
プリント基板と前記保持部材との間に磁気遮蔽手段を配
設したものである。According to a fourth aspect of the present invention, there is provided a printed circuit board, a first electronic component (isolator) having a first magnet mounted on one surface of the printed circuit board, and the other of the printed circuit board. A second electronic component (receiver) having a second magnet provided on the surface side of, a holding member formed of a magnetic material for holding the second electronic component (receiver), Magnetic shielding means is arranged between the holding member and the holding member.
【００２０】従って、請求項４記載の発明によれば、ア
イソレータまたは受話器の磁石の磁力が大きくてもこの
磁気遮蔽手段によってプリント基板の通過を防ぐことが
できるという作用を有する。Therefore, according to the fourth aspect of the present invention, even if the magnetic force of the magnet of the isolator or the receiver is large, the magnetic shielding means can prevent the printed board from passing through.
【００２１】また、請求項５記載の発明は、磁気遮蔽手
段は、前記第１または第２いずれか一方の磁石に同極を
向けて配設した磁石によって構成されるものである。According to a fifth aspect of the present invention, the magnetic shielding means is constituted by a magnet arranged with the same polarity facing one of the first and second magnets.
【００２２】従って、請求項５記載の発明によれば、ア
イソレータまたは受話器の磁石の磁力が大きくてもこの
磁石によってプリント基板の通過を完全に防ぐことがで
きるという作用を有する。Therefore, according to the fifth aspect of the present invention, even if the magnetic force of the magnet of the isolator or the receiver is large, the magnet can completely prevent the passage of the printed circuit board.
【００２３】また、請求項６記載の発明は、磁気遮蔽手
段として設けた磁石は両面粘着材によって固定させたも
のである。Further, in the invention according to claim 6, the magnet provided as the magnetic shielding means is fixed by a double-sided adhesive.
【００２４】従って、請求項６記載の発明によれば、同
極が対向することによる反発力の作用によって磁石が移
動するのを粘着材の粘着力によって防止できるという作
用を有する。Therefore, according to the sixth aspect of the present invention, the magnet can be prevented from moving by the action of the repulsive force caused by the opposing poles, by the adhesive force of the adhesive.
【００２５】また、本発明における請求項７記載の発明
は、請求項１乃至６記載の磁気遮蔽装置を備えているこ
とを特徴とする携帯情報機器としたものである。According to a seventh aspect of the present invention, there is provided a portable information device comprising the magnetic shielding device according to the first to sixth aspects.
【００２６】従って、請求項７記載の発明によれば、限
られた容量が充電された電池が装着されるが、アイソレ
ータの性能劣化を防止することで消費電流が増えるのを
防止するという作用を有する。Therefore, according to the present invention, although a battery charged to a limited capacity is mounted, an effect of preventing an increase in current consumption by preventing performance degradation of the isolator is provided. Have.
【００２７】[0027]
【発明の実施の形態】以下、図面を参照して本発明にお
ける実施の形態を説明する。図１は本発明の実施の形態
を示す全体構成図である。なお、ここでは本発明の実施
の磁気遮蔽装置を備えた携帯電話機（以下、機器とい
う）の断面図として例示してある。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram showing an embodiment of the present invention. Here, a cross-sectional view of a mobile phone (hereinafter, referred to as a device) provided with the magnetic shielding device according to the embodiment of the present invention is illustrated.
【００２８】図１において、上ケース１と下ケース２と
より形成された筐体内には、送受信用アンテナ３、受信
用アンテナ４、音声を出力する受話器５、文字や記号等
を表示する液晶表示部６、文字、記号が印刷されたキー
シート７、送話器８、本体プリント基板９などが収容さ
れており、筐体の外部には電源を供給する電池10が装着
されている。In FIG. 1, a transmitting / receiving antenna 3, a receiving antenna 4, a receiver 5 for outputting voice, and a liquid crystal display for displaying characters and symbols are provided in a housing formed by an upper case 1 and a lower case 2. A housing 6, a key sheet 7 on which characters and symbols are printed, a transmitter 8, a main body printed circuit board 9, and the like are accommodated. A battery 10 for supplying power is mounted outside the housing.
【００２９】上ケース１には、受話器５より発生した音
声を筐体外に導く音孔11、キーシート７の突起12が挿入
されこの突起12と同数のキー穴13、液晶表示部６の大き
さと同等な開口14などが設けられ、この開口14には透明
窓15によって蓋がなされており、使用者が液晶表示部６
に表示される文字、記号等が認識、判読できるようにな
っている。The upper case 1 has a sound hole 11 for guiding the sound generated from the receiver 5 to the outside of the housing, a projection 12 of the key sheet 7 inserted therein, and the same number of key holes 13 as the projection 12. An equivalent opening 14 and the like are provided, and the opening 14 is covered with a transparent window 15 so that the user can
Can be recognized and read.
【００３０】本体プリント基板９の裏面には電圧で発信
周波数を制御する発振器（以下、ＶＣＯという）や周波
数を安定制御する温度補償水晶発信器（以下、VC-TCXO
という）や複数の抵抗、コンデンサなどが実装され、ロ
ーノイズアンプやファーストミキサなどからなる受信回
路部16が形成され、また、変調器、パワーアンプ（以
下、PAという）やアイソレータ、複数の抵抗、コンデン
サなどが表面実装されて送信回路部17が形成されてい
る。これら受信回路部16や送信回路部17は外部からの電
磁波の侵入を防止する樹脂製のシールドケース18が装着
されて覆われる。An oscillator (hereinafter, referred to as VCO) for controlling the oscillation frequency by voltage and a temperature-compensated crystal oscillator (hereinafter, VC-TCXO) for stably controlling the frequency are provided on the back surface of the main body printed circuit board 9.
), A plurality of resistors, capacitors, etc. are mounted to form a receiving circuit section 16 including a low noise amplifier, a fast mixer, etc. In addition, a modulator, a power amplifier (hereinafter, referred to as PA), an isolator, a plurality of resistors, capacitors Are mounted on the surface to form a transmission circuit section 17. The receiving circuit section 16 and the transmitting circuit section 17 are covered with a resin shield case 18 for preventing invasion of electromagnetic waves from outside.
【００３１】シールドケース18はアクリロニトリル・ブ
タジエン・スチレンなどの樹脂材料で成形され、表面に
は無電解銅めっきが施されることにより電磁波の通過が
阻止され、さらにその表面には無電解ニッケルめっきが
施されて無電解銅めっきの防錆処理がなされている。The shield case 18 is formed of a resin material such as acrylonitrile, butadiene, and styrene. Electroless copper plating is applied to the surface to prevent the passage of electromagnetic waves, and furthermore, electroless nickel plating is applied to the surface. It has been subjected to a rustproof treatment of electroless copper plating.
【００３２】次に、受話器５について説明する。図２は
受話器近傍の部分拡大図である。図２において、受話器
５は、振動板19、振動板19に固着されたコイル20、コイ
ル20の内側に配設された円盤状磁石21、円盤状磁石21を
保持するヨーク22、磁石を保持するヨーク22とともにフ
レーム23と蓋24、外部に突出した一対の給電端子25とか
ら構成され、上ケース１には、受話器クッション26が所
定量圧縮されて組付けられるようにするために、上ケー
ス１に形成された係止部27と嵌合する引掛け爪28が形成
された受話器ホルダー29によって保持されている。Next, the receiver 5 will be described. FIG. 2 is a partially enlarged view near the handset. In FIG. 2, the receiver 5 includes a diaphragm 19, a coil 20 fixed to the diaphragm 19, a disc-shaped magnet 21 disposed inside the coil 20, a yoke 22 for holding the disc-shaped magnet 21, and a magnet. The yoke 22 is composed of a frame 23, a lid 24, and a pair of power supply terminals 25 protruding to the outside. The upper case 1 is compressed with a predetermined amount of the receiver cushion 26 to the upper case 1. The hooking claw 28 that fits into the locking portion 27 formed in the receiver is held by the receiver holder 29 formed with the hook.
【００３３】円盤状磁石21はヨーク22と対向する面にＳ
極が、この反対面にＮ極が着磁されている。この受話器
ホルダー29は磁性を有するばね鋼鋼材（SUP）や磁性を
有するステンレス鋼板（例えばSUS 430など）、珪素鋼
板などの板金をプレス加工によって形成され、引掛け爪
28は絞り加工にて形成されている。この受話器ホルダー
29には、鉄と樹脂が含まれた薄板状磁石30が粘着材によ
って粘着され、非粘着面はプリント基板９と当接するよ
うになっている。この薄板状磁石30は両面着磁パターン
であり、粘着面はＳ極、非粘着面はＮ極となっており、
薄板状磁石30と円盤状磁石21の同極が互いに向き合うよ
うに配設されている。The disk-shaped magnet 21 has a surface S facing the yoke 22.
A pole is magnetized on the opposite surface with an N pole. The receiver holder 29 is formed by pressing a sheet metal such as a spring steel material having magnetic properties (SUP), a stainless steel sheet having magnetic properties (for example, SUS430), or a silicon steel sheet.
28 is formed by drawing. This handset holder
A thin plate-shaped magnet 30 containing iron and resin is adhered to 29 by an adhesive material, and the non-adhesive surface is in contact with the printed circuit board 9. This thin plate magnet 30 has a double-sided magnetized pattern, the adhesive surface has an S pole, the non-adhesive surface has an N pole,
The thin-plate magnet 30 and the disc-shaped magnet 21 are arranged so that the same poles face each other.
【００３４】なお、一般に磁石の材料として希土類コバ
ルト焼結磁石があるが、焼結品は機械的に脆弱である。
この種の携帯機器は使用者が誤って落下する場合が多々
有り、その時の衝撃力が内部部品に作用することにより
損壊を招き、磁石としての機能維持ができなくなる。In general, a rare earth cobalt sintered magnet is used as a material of the magnet, but the sintered product is mechanically fragile.
In many cases, this type of portable device causes the user to accidentally drop, and the impact force at that time acts on the internal components, causing damage, and the function as a magnet cannot be maintained.
【００３５】そこで、本実施形態では、Fe-B-R系急冷微
細片（RはNdおよび／またはPr）とエポキシ樹脂などの
樹脂材料を結合剤にし、薄板状に圧縮形成された樹脂磁
石を用いている。また希土類コバルト焼結磁石に比べ樹
脂が含まれているので、比較的軽く、携帯用としての機
器に用いる場合、重くする要因とはならないものを選択
した。Therefore, in the present embodiment, a resin material such as an Fe-BR quenched fine piece (R is Nd and / or Pr) and an epoxy resin is used as a binder, and a resin magnet compressed and formed into a thin plate is used. I have. Further, since the resin is contained as compared with the rare earth cobalt sintered magnet, a material which is relatively light and does not become a factor for increasing the weight when used in portable equipment is selected.
【００３６】次に、受話器５の動作について説明する。
コイル20に電気信号が加わると、円盤状磁石21とこの円
盤状磁石21によって形成された磁界中に設けられたコイ
ル20とはフレミングの左手の法則に従い、固定された円
盤状磁石21は不動であり、コイル20には電気信号に応じ
た力が発生し、この力がコイル20と一体に設けられた振
動板19を振動させ、この振動が疎密波を形成することに
より、音声が生じるようになっている。Next, the operation of the receiver 5 will be described.
When an electric signal is applied to the coil 20, the disc-shaped magnet 21 and the coil 20 provided in the magnetic field formed by the disc-shaped magnet 21 follow the Fleming's left-hand rule, and the fixed disc-shaped magnet 21 is immobile. There is a force generated in the coil 20 in accordance with an electric signal, and the force vibrates the diaphragm 19 provided integrally with the coil 20, and this vibration forms a compressional wave, so that sound is generated. Has become.
【００３７】図３に本発明の実施の形態における携帯電
話機の回路構成図を示す。図３において、アンテナ31、
共用器32、アイソレータ33、送信部34、変調部35、送話
部36、送話器37、制御部38、受信部39、復調部40、受話
部41、受話器42を備えている。FIG. 3 shows a circuit configuration diagram of the mobile phone according to the embodiment of the present invention. In FIG. 3, the antenna 31,
It includes a duplexer 32, an isolator 33, a transmission unit 34, a modulation unit 35, a transmission unit 36, a transmission unit 37, a control unit 38, a reception unit 39, a demodulation unit 40, a reception unit 41, and a reception unit 42.
【００３８】次に動作について説明する。送話器37に加
えられた音声は電気信号に変換され、送話部36で適当な
出力に増幅される。次に、変調部35で送話部36からの電
気信号を送信波に重畳し、送信部34で十分な出力に増幅
された後、アイソレータ33、共用器32を通過し、アンテ
ナ31から送信波が放射される。Next, the operation will be described. The voice applied to the transmitter 37 is converted into an electric signal, and is amplified by the transmitter 36 to an appropriate output. Next, the modulation section 35 superimposes the electric signal from the transmission section 36 on the transmission wave, amplifies it to a sufficient output by the transmission section 34, passes through the isolator 33 and the duplexer 32, and transmits the transmission wave from the antenna 31. Is emitted.
【００３９】また、アンテナ31で受信された受信波は共
用器32を通過後、受信部39で十分に増幅される。次に、
復調部40で受信波を復調し、受話部41で適当に増幅さ
れ、受話器42で音声に変換される。The reception wave received by the antenna 31 passes through the duplexer 32 and is sufficiently amplified by the reception unit 39. next,
The received wave is demodulated by the demodulation unit 40, appropriately amplified by the reception unit 41, and converted into voice by the receiver 42.
【００４０】次に、アイソレータ33について詳述する。
アイソレータ33は受信回路部16の中に設けられ、プリン
ト基板９の裏面に表面実装されている。このアイソレー
タ33は反対面に設けられた受話器５と重畳する位置に配
設されており、上方はシールドケース18に覆われてい
る。Next, the isolator 33 will be described in detail.
The isolator 33 is provided in the receiving circuit section 16 and is surface-mounted on the back surface of the printed circuit board 9. The isolator 33 is disposed at a position overlapping with the receiver 5 provided on the opposite surface, and the upper part is covered with the shield case 18.
【００４１】アイソレータ33の特徴は、ファラデー効果
を利用した単向管である。入射波を磁力により偏波面を
回転させ、出力波を取出す機能を有し、かつ入力側、出
力側の偏波面を適当に設定することによる単向性を実現
するものである。アイソレータ33はこの特徴を利用し、
出力側のインピーダンスの変動を入力側に伝達しないた
め、アンテナ送信時の負荷変動安定性を確保するために
設けられるが、外部の磁界を受けた場合、加える磁力が
変化し、入力波の波長により偏波面の回転量が変化し、
所望の作用が得られなくなる。The characteristic of the isolator 33 is a unidirectional tube utilizing the Faraday effect. It has a function of rotating the plane of polarization of an incident wave by magnetic force to extract an output wave, and realizes unidirectionality by appropriately setting the planes of polarization on the input and output sides. The isolator 33 takes advantage of this feature,
This is provided to ensure the stability of load fluctuations during antenna transmission because the output impedance fluctuations are not transmitted to the input side.However, when an external magnetic field is applied, the applied magnetic force changes, and depending on the wavelength of the input wave, The amount of rotation of the polarization plane changes,
The desired action cannot be obtained.
【００４２】従って、受話器５とアイソレータ33がプリ
ント基板９を挟んで近傍に配置されると、いずれか一方
の劣化を招く。Accordingly, if the receiver 5 and the isolator 33 are disposed in the vicinity of the printed circuit board 9, one of them is deteriorated.
【００４３】なお、プリント基板９のパターンを形成す
る銅箔は非磁性体であるため、電磁波の遮蔽に有効では
あるが、磁気遮蔽には効果がない。Although the copper foil forming the pattern of the printed circuit board 9 is a non-magnetic material, it is effective for shielding electromagnetic waves, but has no effect on magnetic shielding.
【００４４】そこで、プリント基板９と受話器５の間に
磁性体である受話器ホルダー29や薄板状磁石30を設け
て、受話器５に収容された円盤状磁石21の磁力がプリン
ト基板９を通過させないようにしてある。Therefore, a receiver holder 29 and a thin plate magnet 30 which are magnetic materials are provided between the printed circuit board 9 and the receiver 5 so that the magnetic force of the disk-shaped magnet 21 accommodated in the receiver 5 does not pass through the printed circuit board 9. It is.
【００４５】ここで、発明者の実験結果について説明す
る。以下に示す表１は本発明の実施の形態における携帯
電話機の消費電流と受話器５からの漏洩磁束との相関の
実験結果である。Here, the experimental results of the inventor will be described. Table 1 shown below is an experimental result of a correlation between the current consumption of the mobile phone according to the embodiment of the present invention and the magnetic flux leakage from the receiver 5.
【００４６】[0046]
【表１】[Table 1]
【００４７】上記表について説明する。The above table will be described.
【００４８】状態１は受話器５が具備されないときの携
帯電話機の状態とする。前記状態１の消費電流を基準と
し、次に記す各状態の消費電流を状態１からの変動分で
記している。State 1 is the state of the portable telephone when the receiver 5 is not provided. Based on the current consumption in state 1 as a reference, the current consumption in each state described below is represented by a variation from state 1.
【００４９】状態２は受話器５と重畳する位置にアイソ
レータ33が実装されている状態である。前記状態２では
受話器５からの漏洩磁束は70ガウスであった。State 2 is a state in which the isolator 33 is mounted at a position where the isolator 33 overlaps with the receiver 5. In the state 2, the leakage magnetic flux from the receiver 5 was 70 gauss.
【００５０】状態３は受話器５と重畳する位置にアイソ
レータ33が実装され、かつ磁性体である受話器ホルダー
29を設けた状態である。前記状態３では受話器５からの
漏洩磁束は30ガウスであった。In state 3, the isolator 33 is mounted at a position overlapping with the receiver 5, and the receiver holder is made of a magnetic material.
29 is provided. In the state 3, the leakage magnetic flux from the receiver 5 was 30 gauss.
【００５１】状態４は受話器５と重畳する位置にアイソ
レータ33が実装され、かつ磁性体である受話器ホルダー
29とともに薄板状磁石30を設けた状態である。前記状態
３では受話器５からの漏洩磁束は−10ガウスであった。In state 4, the isolator 33 is mounted at a position overlapping with the receiver 5 and the receiver holder is made of a magnetic material.
This is a state in which a thin plate magnet 30 is provided together with 29. In the state 3, the leakage magnetic flux from the receiver 5 was -10 gauss.
【００５２】すなわち磁性体である受話器ホルダー29は
受話器５からの漏洩磁束を40ガウス減少させる作用を持
つ。また、薄板状磁石30は受話器５からの漏洩磁束を40
ガウス減少させる作用を持つ。That is, the receiver holder 29 made of a magnetic material has the function of reducing the leakage magnetic flux from the receiver 5 by 40 gauss. The thin plate magnet 30 reduces the leakage flux from the receiver 5 by 40.
Has the effect of reducing Gauss.
【００５３】従って、実験結果より重畳しているときは
プリント基板９と受話器５の間に磁性体とともに薄板状
磁石30を設けるとよく、漏洩磁束が40ガウス以下であれ
ばこの薄板状磁石30を設けなくとも磁性体である受話器
ホルダー29を設ければアイソレータ33の劣化を防止でき
ることが理解される。Therefore, it is preferable to provide a thin plate magnet 30 together with a magnetic material between the printed circuit board 9 and the receiver 5 when they are superimposed according to the experimental results. It is understood that the deterioration of the isolator 33 can be prevented by providing the receiver holder 29 made of a magnetic material without providing the receiver.
【００５４】すなわち、受話器５の円盤状磁石21からの
漏洩磁束がアイソレータ33の劣化を招来するため、プリ
ント基板９と受話器５の間に磁性体を介在させたり、或
いは薄板状磁石30を設け、受話器５の円盤状磁石21と同
極が対向するように設ければ良い。That is, since the magnetic flux leaking from the disc-shaped magnet 21 of the receiver 5 causes deterioration of the isolator 33, a magnetic material is interposed between the printed circuit board 9 and the receiver 5, or a thin plate magnet 30 is provided. What is necessary is just to provide so that the same pole and the disk-shaped magnet 21 of the receiver 5 may face.
【００５５】なお、この場合、薄板状磁石30の異極がア
イソレータ32と対向するようになるが、薄板状磁石30の
磁力を適当な値に定めることによって、受話器５の円盤
状磁石21からの漏洩磁束と相殺される。このため、アイ
ソレータ33に加えられる薄板状磁石30の異極からの漏洩
磁束の影響は排除できる。In this case, the opposite pole of the thin plate magnet 30 faces the isolator 32. By setting the magnetic force of the thin plate magnet 30 to an appropriate value, the magnetic force of the disk magnet 21 of the handset 5 can be reduced. It is offset by the leakage magnetic flux. For this reason, the influence of the leakage magnetic flux from the different pole of the thin plate magnet 30 applied to the isolator 33 can be eliminated.
【００５６】[0056]
【発明の効果】以上説明したように本発明においては、
第１に、プリント基板と、このプリント基板を挟むよう
に設けられ、第１と第２の磁石を有する第１と第２の電
子部品とを備え、前記第１と第２の電子部品との間に磁
気遮蔽手段を配設したものであり、第１または第２の磁
石の磁力がプリント基板の通過を防ぐことができるの
で、磁石の作用を利用した電子部品の機能の低下を防止
でき、またこの効果により第１と第２の電子部品の配置
位置が設計的に制約を受けることなく任意に決定でき
る。従って、装置の小型化を図る上でデザインへの影響
も排除できる。As described above, in the present invention,
First, a printed circuit board is provided so as to sandwich the printed circuit board, and first and second electronic components having first and second magnets are provided. Since magnetic shielding means is provided between the first and second magnets, it is possible to prevent the magnetic force of the first or second magnet from passing through the printed circuit board. Further, by this effect, the arrangement positions of the first and second electronic components can be arbitrarily determined without being restricted by design. Therefore, the effect on the design can be eliminated in reducing the size of the device.
【００５７】第２に、プリント基板と、このプリント基
板の一方の面に実装されたアイソレータと、プリント基
板の他方の面側に設けられ、第２の磁石を有した受話器
とを備え、前記プリント基板と前記受話器との間に磁気
遮蔽手段を配設したものであり、アイソレータまたは受
話器の磁石の磁力がプリント基板の通過を防ぐことがで
きるので、磁石の作用を利用したアイソレータまたは受
話器の機能の低下を防止でき、またこの効果によりこれ
らアイソレータや受話器の配置位置が設計的に制約を受
けることなく任意に決定できる。従って、装置の小型化
を図る上でデザインへの影響も排除できる。Second, there is provided a printed circuit board, an isolator mounted on one surface of the printed circuit board, and a receiver provided on the other surface side of the printed circuit board and having a second magnet. Magnetic shielding means is disposed between the board and the receiver, and the magnetic force of the magnet of the isolator or the receiver can prevent the printed circuit board from passing therethrough, so that the function of the isolator or the receiver using the action of the magnet is utilized. It is possible to prevent the lowering, and by this effect, the disposition positions of these isolators and receivers can be arbitrarily determined without being restricted by design. Therefore, the effect on the design can be eliminated in reducing the size of the device.
【００５８】第３に、プリント基板と、このプリント基
板の一方の面に実装されるアイソレータと、前記プリン
ト基板の他方の面側に設けられ、磁石を有した受話器
と、前記受話器を保持し磁性体で形成された保持部材と
を備え、前記プリント基板と前記受話器をとの間に前記
保持部材を配設したものであり、特別な磁気遮蔽部材を
設けなくともアイソレータまたは受話器の磁石の磁力が
プリント基板の通過を防ぐことができるので、磁石の作
用を利用したアイソレータまたは受話器の機能の低下を
防止でき、またこの効果によりこれらアイソレータや受
話器の配置位置が設計的に制約を受けることなく任意に
決定できる。従って、装置の小型化を図る上でデザイン
への影響も排除できる。Third, a printed circuit board, an isolator mounted on one surface of the printed circuit board, a receiver provided on the other surface side of the printed circuit board and having a magnet, and a magnet holding and holding the receiver. A holding member formed of a body, wherein the holding member is disposed between the printed circuit board and the handset, and the magnetic force of the isolator or the magnet of the handset is provided without providing a special magnetic shielding member. Since the passage of the printed circuit board can be prevented, the function of the isolator or the receiver using the action of the magnet can be prevented from deteriorating, and the position of the isolator or the receiver can be arbitrarily set without being restricted by design due to this effect. Can decide. Therefore, the effect on the design can be eliminated in reducing the size of the device.
【００５９】第４に、プリント基板と、このプリント基
板の一方の面に実装されたアイソレータと、前記プリン
ト基板の他方の面側に設けられた受話器と、この受話器
を保持する磁性体で形成された保持部材と、前記プリン
ト基板と前記保持部材との間に磁気遮蔽手段を配設した
ものであり、アイソレータまたは受話器の磁石の磁力が
大きくてもこの磁気遮蔽手段によってプリント基板の通
過を防ぐことができるので、磁石の作用を利用したアイ
ソレータまたは受話器の機能の低下を防止でき、またこ
の効果によりこれらアイソレータや受話器の配置位置が
設計的に制約を受けることなく任意に決定できる。従っ
て、装置の小型化を図る上でデザインへの影響も排除で
きる。Fourth, the printed circuit board, an isolator mounted on one surface of the printed circuit board, a receiver provided on the other surface side of the printed circuit board, and a magnetic material holding the receiver are formed. A magnetic shielding means is disposed between the holding member and the printed board and the holding member. Even if the magnetic force of the magnet of the isolator or the handset is large, the magnetic shielding means prevents the printed board from passing through. Therefore, it is possible to prevent the function of the isolator or the handset from deteriorating by utilizing the action of the magnet, and it is possible to arbitrarily determine the position of the isolator or the handset without being restricted by design due to this effect. Therefore, the effect on the design can be eliminated in reducing the size of the device.
【００６０】第５に、磁気遮蔽手段は、受話器の磁石に
同極を向けて配設した磁石であり、アイソレータまたは
受話器の磁石の磁力が大きくてもこの磁石によってプリ
ント基板の通過を完全に防ぐことができるので、磁石の
作用を利用したアイソレータまたは受話器の機能の低下
を防止でき、またこの効果によりこれらアイソレータや
受話器の配置位置が設計的に制約を受けることなく任意
に決定できる。従って、装置の小型化を図る上でデザイ
ンへの影響も排除できる。Fifth, the magnetic shielding means is a magnet arranged with the same polarity as the magnet of the receiver, and even if the magnetic force of the isolator or the magnet of the receiver is large, the magnet completely prevents the passage of the printed circuit board. Therefore, it is possible to prevent the function of the isolator or the handset from deteriorating by utilizing the action of the magnet, and to arrange the isolators or the handset arbitrarily by the effect without being restricted by design. Therefore, the effect on the design can be eliminated in reducing the size of the device.
【００６１】第６に、磁気遮蔽手段として設けた磁石は
両面粘着材によって固定されているので、同極が対向す
ることによる反発力の作用によって磁石が移動するのを
防止でき、常に同じ位置に配設されるので、アイソレー
タまたは受話器の磁石の磁力が大きくてもこの磁石によ
ってプリント基板の通過を完全に防ぐことができ、磁石
の作用を利用したアイソレータまたは受話器の機能の低
下を防止できる。Sixth, since the magnet provided as the magnetic shielding means is fixed by the double-sided adhesive, it is possible to prevent the magnet from moving by the action of the repulsive force due to the opposing poles, and to always keep the magnet at the same position. As a result, even if the magnet of the isolator or the receiver has a large magnetic force, the magnet can completely prevent the magnet from passing through the printed circuit board, and the function of the isolator or the receiver using the action of the magnet can be prevented from deteriorating.
【００６２】第７に、これら磁気遮蔽手段を備えた携帯
情報機器では、限られた容量が充電された電池が装着さ
れるが、アイソレータの性能劣化を防止することで消費
電流が増えるのを防止するため、通話時間や待ち受け時
間を短くさせることはない。Seventh, in a portable information device equipped with these magnetic shielding means, a battery charged to a limited capacity is mounted. However, by preventing performance degradation of the isolator, current consumption is prevented from increasing. Therefore, the talk time and the standby time are not shortened.
【００６３】すなわち、機器に電源を供給する電池の容
量は有限なので、電池を充電してから空になるまでの時
間すなわち使用時間や待ち受け時間をを短くしなくて済
むといった効果を有する。That is, since the capacity of the battery for supplying power to the device is finite, there is an effect that the time from charging the battery to emptying, that is, the use time and the standby time does not have to be shortened.
【００６４】さらに、この種の機器は小型軽量化ととも
に薄型化が望まれており、部品配置の制約があればその
妨げとなる。しかし、本発明の実施の形態ではその制約
を排除することができるといった効果を有するので、こ
の種の機器に好適である。Further, it is desired that this type of equipment be reduced in size and weight as well as made thinner. However, the embodiment of the present invention has an effect that the restriction can be eliminated, so that it is suitable for this type of equipment.
【図１】本発明の実施の磁気遮蔽装置の形態を備えた携
帯電話機の断面図、FIG. 1 is a cross-sectional view of a mobile phone having a form of a magnetic shielding device according to an embodiment of the present invention;
【図２】本発明の実施の形態における受話器近傍の構成
を示す断面図、FIG. 2 is a cross-sectional view showing a configuration in the vicinity of a receiver according to the embodiment of the present invention;
【図３】本発明の実施の形態における携帯電話機の回路
構成図、FIG. 3 is a circuit configuration diagram of the mobile phone according to the embodiment of the present invention;
【図４】従来の携帯電話機の断面図、FIG. 4 is a cross-sectional view of a conventional mobile phone;
【図５】従来の受話器近傍の構成を示す断面図、FIG. 5 is a sectional view showing a configuration near a conventional handset,
【図６】従来の無線回路の周辺の回路構成を示す図、FIG. 6 is a diagram showing a circuit configuration around a conventional wireless circuit;
【図７】従来の受話器近傍の構成を示す一部拡大した分
解斜視図である。FIG. 7 is a partially enlarged exploded perspective view showing a configuration near a conventional handset.
１ 上ケース ２ 下ケース ３、31、55 アンテナ ４ 受信用アンテナ ５、42、44 受話器 ６ 液晶表示器 ７ キーシート ８、37、54 送話器 ９、43 プリント基板 10 電池 11 音孔 12 突起 13 キー穴 14 開口 15 透明窓 16 受信回路部 17 送信回路部 18、44 シールドケース 19 振動板 20 コイル 21 円盤状磁石 22 ヨーク 23 フレーム 24 蓋 25 給電端子 26 受話器クッション 27 係止部 28 引掛け爪 29 受話器ホルダー 30 薄板状磁石 32、47 共用器 33、48 アイソレータ 34、49 送信部 35、50 変調部 36、51 送話部 38 制御部 39、52 受信部 40、53 復調部 41 受話部 57 リード線 DESCRIPTION OF SYMBOLS 1 Upper case 2 Lower case 3, 31, 55 Antenna 4 Receiving antenna 5, 42, 44 Receiver 6 Liquid crystal display 7 Key sheet 8, 37, 54 Transmitter 9, 43 Printed circuit board 10 Battery 11 Sound hole 12 Projection 13 Keyhole 14 Opening 15 Transparent window 16 Receiver circuit section 17 Transmitter circuit section 18, 44 Shield case 19 Diaphragm 20 Coil 21 Disc magnet 22 Yoke 23 Frame 24 Lid 25 Power supply terminal 26 Handset cushion 27 Locking section 28 Hook 29 Receiver holder 30 Thin plate magnet 32, 47 Duplexer 33, 48 Isolator 34, 49 Transmitter 35, 50 Modulator 36, 51 Transmitter 38 Control 39, 52 Receiver 40, 53 Demodulator 41 Receiver 57 Lead wire
───────────────────────────────────────────────────── フロントページの続き (72)発明者 曽布川 敦 静岡県浜松市元城町216−18 株式会社松 下通信静岡研究所内 Ｆターム(参考） 4E360 AA02 AB05 AB12 AB42 CA02 EE02 EE12 GA31 GA34 GA52 GB26 GC08 GC16 5D012 BB03 BB09 FA08 5E321 AA02 CC16 GG05 GG07 5K023 AA07 BB28 DD06 LL01 LL04 LL05 LL06 MM00 MM25 QQ05 RR01 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Atsushi Sobukawa 216-18 Motojo-cho, Hamamatsu-shi, Shizuoka F-term in Matsushita Communication Shizuoka Research Laboratories Co., Ltd. 4E360 AA02 AB05 AB12 AB42 CA02 EE02 EE12 GA31 GA34 GA52 GB26 GC08 GC16 5D012 BB03 BB09 FA08 5E321 AA02 CC16 GG05 GG07 5K023 AA07 BB28 DD06 LL01 LL04 LL05 LL06 MM00 MM25 QQ05 RR01
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11080348AJP2000277970A (en) | 1999-03-24 | 1999-03-24 | Magnetic shielding device and portable information device having the same |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11080348AJP2000277970A (en) | 1999-03-24 | 1999-03-24 | Magnetic shielding device and portable information device having the same |
| Publication Number | Publication Date |
|---|---|
| JP2000277970Atrue JP2000277970A (en) | 2000-10-06 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11080348APendingJP2000277970A (en) | 1999-03-24 | 1999-03-24 | Magnetic shielding device and portable information device having the same |
| Country | Link |
|---|---|
| JP (1) | JP2000277970A (en) |
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