JP2004215149A - Antenna - Google Patents

Antenna Download PDF

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Publication number
JP2004215149A
JP2004215149A JP2003002043A JP2003002043A JP2004215149A JP 2004215149 A JP2004215149 A JP 2004215149A JP 2003002043 A JP2003002043 A JP 2003002043A JP 2003002043 A JP2003002043 A JP 2003002043A JP 2004215149 A JP2004215149 A JP 2004215149A
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JP
Japan
Prior art keywords
antenna
wiring board
antenna element
base
shape
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.)
Pending
Application number
JP2003002043A
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Japanese (ja)
Inventor
Yoshinobu Nakagawa
吉信 中川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2003002043A priority Critical patent/JP2004215149A/en
Priority to CNB2003101249193A priority patent/CN100337367C/en
Priority to DE200410001354 priority patent/DE102004001354A1/en
Publication of JP2004215149A publication Critical patent/JP2004215149A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/12Supports; Mounting means
    • H01Q1/22Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/36Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
  • Details Of Aerials (AREA)
  • Telephone Set Structure (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sized antenna with cubic volume smaller than that of inverted F type antenna and which is not required to be arranged on a wiring substrate of equipment regarding a built-in type antenna to be arranged in radio equipment represented by a cellular phone. <P>SOLUTION: An antenna element 31 fixed to a base part 21 is constituted as so called a monopole type folded pattern by arranging a plurality of branched parts 33A in parallel relation with a lower surface part 25 of the base part 21 and coupling the branched parts 33A in the vertical direction on the side of the other end part of the base part 21 by a coupling part 33B, and a connection part 35 of the antenna element 31 is projectedly provided on the side of the base part 21. Thus, area of the antenna element 31 is made small, the cubic volume is reduced and electric connection is contrived by arranging the antenna in line on a wiring substrate 52 of the equipment. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、携帯電話に代表される無線機器に配される内蔵タイプのアンテナに関するものである。
【0002】
【従来の技術】
近年、携帯電話に代表される無線機器の普及は目覚しく、特に小型軽量のものが好まれている。
【0003】
そして、無線機器には、通常、電波の送受信を行うためにアンテナが搭載されているが、このアンテナも、機器の筐体内に配される内蔵タイプのものが普及し始めている。
【0004】
このような従来の内蔵タイプのアンテナについて、図6および図7を用いて説明する。
【0005】
図6は従来の内蔵タイプのアンテナの外観斜視図であり、同図において、1は、成形樹脂で略長方体の箱型に形成された基体部であり、その上面には金属薄板からなるアンテナ素子2が固定されている。
【0006】
このアンテナ素子2は、所定の送受信周波数に対応する形状に加工されていると共に、その端部には、給電端子2Aとグランド端子2Bが設けられている。
【0007】
そして、このように構成されたアンテナは、図7の上面図に示すように、機器の筐体10内に位置決め保持された配線基板11の上に載置されて、給電端子2Aが、配線基板11の給電ライン11Aに接続され、グランド端子2Bが配線基板11のグランドライン11Bに接続されて装着されるものである。
【0008】
以上の構成の従来のアンテナは、いわゆる逆Fタイプと呼称され、この逆Fタイプのものが現在多く用いられている。
【0009】
なお、この出願の発明に関連する先行技術文献情報としては、例えば、特許文献1、特許文献2が知られている。
【0010】
【特許文献1】
特開2001−352212号公報
【特許文献2】
特開2002−330023号公報
【0011】
【発明が解決しようとする課題】
しかしながら上記従来の逆Fタイプのアンテナは、現在日本で使用されているPDC帯域や、外国で使用されているGSM、DCS帯域などの周波数帯域に対応する電波の送受信時の感度を維持しながら、基体部1、アンテナ素子2などの形状や体積を小型化することが難しく、また、当該アンテナは、通常、配線基板11上に載せて搭載されるものであったため、機器の厚みが厚くなってしまうという課題があった。
【0012】
本発明は、このような従来の課題を解決するものであり、逆Fタイプのものよりも体積が小さくて、機器の配線基板上に配さずに済む小型な内蔵タイプのアンテナを提供することを目的とする。
【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は、以下の構成を有するものである。
【0014】
本発明の請求項1に記載の発明は、樹脂製の基体部と、上記基体部に固定され、上記基体部の側方に突出した接続部を備えた板金製のアンテナ素子とからなり、上記基体部は、使用機器の筐体に設けられた位置規制部などによって使用機器の配線基板に対して所定間隔離れた位置に位置規制されて、上記配線基板と並列的に並べて配されると共に、その装着状態において上記基体部の側方から突出した上記アンテナ素子の接続部が上記配線基板に対して弾接して電気的接続されたアンテナとしたものであり、配線基板の側方に並べて配置するようにして機器に搭載できるため、機器の薄型化に貢献できるという作用を有する。
【0015】
請求項2に記載の発明は、請求項1記載の発明において、アンテナ素子が、ジグザク状の折り返し状態に構成されたモノポールタイプのものであり、請求項1記載の発明による作用に加え、必要な電気長のものを容量結合なども考慮して折り返しパターンで構成することにより、アンテナ素子としての必要面積およびそれを配するための面積を削減させることができると共に、曲面的に形成された基体部の面に沿わせるように当該アンテナ素子の形状を加工することも容易にでき、アンテナ自身の省体積化が容易に実現できるという作用を有する。
【0016】
請求項3に記載の発明は、請求項2記載の発明において、装着状態で使用機器の筐体の外方側に向く基体部の側面部が、上記筐体形状に促した形状に構成されたものであり、請求項2記載の発明による作用に加え、筐体形状に促した形状としてあるアンテナは、筐体内にコンパクトに収容状態に搭載でき、使用機器のさらなる小型化に貢献できるという作用を有する。
【0017】
請求項4に記載の発明は、請求項1記載の発明において、基体部の配線基板側に向く側面部に、上記基体部を上記配線基板と一定距離に保つための突状規制部を設けたものであり、上記突状規制部を使用機器の配線基板の端面に当接もしくは若干の所定隙間を空けた状態で当該アンテナを搭載することにより、アンテナと配線基板との並列配置状態が確実に維持でき、配線基板に対するアンテナ素子の接続部の位置精度が向上したものとなるため、アンテナ搭載時における電気的接続状態が、さらに安定化したものになるという作用を有する。
【0018】
請求項5に記載の発明は、請求項1記載の発明において、アンテナ素子が、コイル状の形状で、そのコイルの一方側の端部に接続部を有するものであり、請求項2記載の発明による作用と同様に、アンテナ素子を少ない体積内で必要な電気長のものとして構成することが容易であるため、アンテナとして体積の小さいものにできるという作用を有する。
【0019】
【発明の実施の形態】
以下、本発明の実施の形態について、図1〜図5を用いて説明する。
【0020】
(実施の形態)
図1は本発明の一実施の形態によるアンテナの前方からの外観斜視図、図2は同後方からの外観斜視図、図3は同アンテナを無線機器の筐体に配置した状態を示す上面図であり、同図において、21は、成形樹脂から形成された基体部であり、この基体部21には、弾性を有する金属薄板を打抜き加工して形成されたアンテナ素子31が固定されている。
【0021】
そして、この基体部21は、中央位置が若干前方側に突出状態に湾曲した横長の略直方体に形成されていると共に、その後方側面部22の両端部には、各々係合用貫通孔を有する突起部41が設けられている。
【0022】
そして、上記基体部21の側方の一端部側にはアンテナ素子31の帯状部32がインサート成形やカシメなどにより固定されている。
【0023】
この帯状部32は、上記基体部21の後方側面部22および上面部23、ならびに上記後方側面部22に対向する前方側面部24に対して同一幅で固定されている。
【0024】
なお、帯状部32は、平坦面に形成された基体部21の下面部25には構成されていない。
【0025】
そして、アンテナ素子31は、上記帯状部32における基体部21の前方側面部24の下方位置から延設され、下面部25と平行関係に基体部21の長手方向に沿って枝状に伸びた第一素子部33を有している。
【0026】
この第一素子部33は、下面部25と平行関係に細幅の枝状部33Aが複数本、配されると共に、この枝状部33Aどうしは、上記基体部21側方の他端部側や中間部分で上下方向に連結部33Bで連結されて構成された、いわゆるモノポール式の折り返しパターンから構成されたものとなっている。
【0027】
そして、上記第一素子部33の枝状部33A間の間隔や連結部33Bの位置などは、送受信する周波数帯域に応じて容量結合などを考慮して構成されている。
【0028】
なお、第一素子部33などは、金属板を打抜き加工することにより、所望の形状で容易かつ高精度に形成できるので生産効率も高いものである。
【0029】
このように第一素子部33を前方側面部24上という同一平面上でジグザク状にコンパクトに折り返し状態に構成してあるため、この第一素子部33が設けられている部分の面積は小さくて済み、これにより基体部21も、従来のものよりも体積の小さい略直方体のものとなる。
【0030】
また、第一素子部33は曲面状態に加工形成することも容易であり、中央位置が若干前方側に突出状態に湾曲した前方側面部24など使用機器の外形形状に合う曲面形状で第一素子部33の配設面の形状が構成されてあっても、第一素子部33を上記配設面に沿わせるように配することも容易にできる。
【0031】
そして、上記アンテナ素子31は、上面部23上に位置する帯状部32の部分から、その上面部23に沿って他端部側の中間位置近傍まで延設された第二素子部34も有している。
【0032】
さらに帯状部32の後方側面部22に応じた部分には、一つの接続部35が構成されている。
【0033】
この接続部35は、弾性を有する舌状で、帯状部32に繋がる所定幅に構成された弾性アーム部35Aとその先端部35Bからなり、先端部35Bは所定面積の平坦面もしくは、それに突部や凹凸を有するものに構成されていると共に、当該アンテナが非装着状態である時には、基体部21の下面部25よりも当該先端部35Bは下方位置にあるように構成されている。
【0034】
以上のように構成される本実施の形態による内蔵タイプのアンテナは、使用機器となる無線機に、図3に示すように搭載されるものであって、続いて、同図を用いて上記無線機器への搭載状態について説明する。
【0035】
同図に示すように、機器の下方側の筐体51は、前方側(同図中では上方側に相当)の中央部が若干突出するように曲線状で形成された上面視略長方形の上方開口の箱型で、前方部分の内部空間を除く位置には、当該機器における配線基板52が位置決め収容されている。
【0036】
なお、この配線基板52には、当該機器を作動させるための各種電子部品などが搭載されていると共に、機器として操作部分となる上方側の筐体なども必要であるが、その説明や図示は省略する。
【0037】
そして、上記に説明したアンテナは、配線基板52が配されていない筐体51の前方部分に、配線基板52から基体部21が所定距離、離れた位置に並べて並列的に配され、筐体51に収容保持されている。
【0038】
このとき、当該アンテナは、第一素子部33側が筐体51の前方側、つまり外方側に向けられるように配され、その状態でアンテナ位置規制用として設けられた筐体51の位置規制部となる凸部51Aで、基体部21の後方側面部22の中央部分が後方ならびに左右方向に対して位置規制されて装着されている。
【0039】
当該アンテナの後方側面部22は、中央位置が前方側に突出された形状となっているため、上記配置状態で後方側面部22の後方部分には所定の空間が持てるようになり、上記空間を用いてアンテナ位置を規制する凸部51Aを容易に配することができ、面積効率よく機器を構成することができる。
【0040】
このとき、アンテナ位置を規制する凸部51Aの前方面側を、上記後方側面部22に応じた形状で構成し、後方側面部22の中央部分近傍含めて一つの凸部51Aで左右方向含めて位置規制するようにすればよい。
【0041】
また、当該アンテナの前方側面部24の両端部近傍も所定の空間が持てるので、この空間にもアンテナ位置を規制する凸部を設け、アンテナ位置を規制するようにしてもよい。
【0042】
そして、上記配置状態とされた際に、アンテナの後方側面部22に設けた各突起部41は、筐体51に設けられた二つの係止用突部53上に各々載るようになっており、各突起部41の上方からビス(図示せず)が螺合されて各突起部41と各係止用突部53は係止されている。
【0043】
また、アンテナ素子31の接続部35は、先端部35Bが配線基板52上に配された信号パターン部52Aに弾接して電気的に接続されている。
【0044】
このとき、配線基板52の上面はアンテナの下面部25よりも高い位置に位置するように組み込まれ、上記のように当該アンテナをビスで螺合させて搭載状態とすると、配線基板52で接続部35の弾性アーム部35Aが上方側に撓められることにより所定の弾接力が発生するようになり、この弾接力で当該弾接部分は安定して接続されたものにでき、例えば、その先端部35Bに突部や凹凸を設けておくと、当該接触は点接触のものにできるため、さらに好ましいものとなる。
【0045】
以上のように構成された本実施の形態によるアンテナを搭載した無線機器は、予め設定されている所定周波数帯域の電波を、当該アンテナを介して送受信して使用するものである。
【0046】
例えば、電波を受信する際には、第一、第二素子部33、34が機能して当該電波を受信し、それが接続部35を介して配線基板52の信号パターン部52Aに伝達され、配線基板52に配した制御部(図示せず)で所定処理が行われて受信状態に応じた機能が作動する。
【0047】
一方、電波を送信する際には、配線基板52の信号パターン部52Aから伝達される信号が、接続部35を介して第一、第二素子部33、34に伝わり、電波として送信される。
【0048】
このとき、当該アンテナは、第一素子部33と第二素子部34とを設けたものであると共に、各々の電気長は異なる長さで設定されているため、少なくとも二つの周波数帯域において良好に送受信可能なものとなる。
【0049】
このように本実施の形態におけるアンテナは、機器の筐体51への搭載時に、面積効率よく配置できる体積の小さいものであるため、機器の小型化に寄与できると共に、当該アンテナの搭載状態として、配線基板52上ではなく、筐体51の底面上に直接載せて搭載して電気的な導通が図れるものであるため、特に筐体51の厚さ、すなわち機器全体の厚みを容易に低減化させることができるという効果が得られるものである。
【0050】
なお、以上には当該アンテナとして第一素子部33と第二素子部34とを有する例で説明したが、素子部の数や形状および材質などには、何ら限定されるものではない。
【0051】
例えば、図4の外観斜視図に示すように、アンテナ素子61として、一端側に接続部61Aを備えた導電性コイル形状のものを棒状の基体部62に固定したものとしてもよく、この場合にも、必要な電気長のアンテナ素子部をコンパクトに構成することができ、小型なものにできる。
【0052】
また、当該コイル状のアンテナにおける機器への搭載状態は、上記のモノポールタイプのものと同じで、当該アンテナを配線基板52に対して並べて並列的に配すると共に、接続部61Aが信号パターン部52Aに弾接するように、突起部62Aの上方からビス(図示せず)を螺合して搭載するものであるため、機器の厚みの低減化などという同様な効果を得ることができる。
【0053】
なお、筐体51などへのアンテナの固着方法はビス止めする以外であってもよく、少なくとも配線基板52との並列的な配置関係が確実に維持された状態で、配線基板52に対してアンテナが配され、かつそのアンテナの接続部35(61A)が安定して信号パターン部52Aに弾接状態になるものであればよい。
【0054】
また、筐体51内におけるアンテナの位置規制状態をさらに確実にするためには、例えば、図5の上面図に示すように、筐体51内に設けたアンテナ位置を規制する凸部51Aに加えて、アンテナ側にも基体部21の後方側面部22に、上面視方形で枠状の突状規制部71を設け、その後方面71Aを配線基板52の端面に当接もしくは若干の隙間を空けた状態で搭載するようにすればよい。
【0055】
この場合には、上記突状規制部71によって、アンテナと配線基板52との並列配置状態が確実に維持でき、配線基板52に対してアンテナ素子31の接続部35の位置精度が向上したものとなるため、アンテナ搭載時における電気的接続状態が、さらに安定化したものになる。
【0056】
【発明の効果】
以上のように本発明のアンテナは、体積が小さくて、機器の配線基板上に配さずに済む小型なものが得られ、機器の薄型化などに寄与できるという有利な効果が得られる。
【図面の簡単な説明】
【図1】本発明の一実施の形態によるアンテナの前方からの外観斜視図
【図2】同後方からの外観斜視図
【図3】同アンテナを無線機器の筐体に配置した状態を示す上面図
【図4】同他の形状のアンテナ素子部を備えたアンテナの後方からの外観斜視図
【図5】同要部である基体部に突状規制部を設けたアンテナを無線機器の筐体に配置した状態を示す上面図
【図6】従来の内蔵タイプのアンテナの外観斜視図
【図7】同アンテナを無線機器の筐体に配置した状態を示す上面図
【符号の説明】
21、62 基体部
22 後方側面部
23 上面部
24 前方側面部
25 下面部
31、61 アンテナ素子
32 帯状部
33 第一素子部
33A 枝状部
33B 連結部
34 第二素子部
35、61A 接続部
35A 弾性アーム部
35B 先端部
41、62A 突起部
51 筐体
51A 凸部
52 配線基板
52A 信号パターン部
53 係止用突部
71 突状規制部
71A 後方面
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a built-in type antenna provided in a wireless device represented by a mobile phone.
[0002]
[Prior art]
2. Description of the Related Art In recent years, wireless devices typified by mobile phones have been remarkably spread, and small and lightweight devices are particularly preferred.
[0003]
In general, a wireless device is provided with an antenna for transmitting and receiving radio waves, and a built-in antenna disposed in a housing of the device has begun to spread.
[0004]
Such a conventional built-in type antenna will be described with reference to FIGS. 6 and 7. FIG.
[0005]
FIG. 6 is an external perspective view of a conventional built-in type antenna. In FIG. 6, reference numeral 1 denotes a substantially rectangular box-shaped base portion formed of a molding resin, and an upper surface thereof is formed of a thin metal plate. The antenna element 2 is fixed.
[0006]
The antenna element 2 is processed into a shape corresponding to a predetermined transmission / reception frequency, and a feed terminal 2A and a ground terminal 2B are provided at its ends.
[0007]
The antenna thus configured is placed on a wiring board 11 positioned and held in a housing 10 of the device, as shown in a top view of FIG. The ground terminals 2B are connected to the ground lines 11B of the wiring board 11 and mounted.
[0008]
The conventional antenna having the above configuration is called a so-called inverted-F type, and the inverted-F type antenna is widely used at present.
[0009]
As prior art document information related to the invention of this application, for example, Patent Document 1 and Patent Document 2 are known.
[0010]
[Patent Document 1]
JP 2001-352212 A [Patent Document 2]
JP 2002-330023 A
[Problems to be solved by the invention]
However, the above-mentioned conventional inverted-F type antenna maintains sensitivity when transmitting and receiving radio waves corresponding to frequency bands such as the PDC band currently used in Japan and the GSM and DCS bands used overseas. It is difficult to reduce the shape and volume of the base 1 and the antenna element 2 and the like. Further, since the antenna is usually mounted on the wiring board 11, the thickness of the device is increased. There was a problem of getting it.
[0012]
The present invention is to solve such a conventional problem, and to provide a small built-in type antenna which has a smaller volume than that of the inverted F type and does not need to be arranged on the wiring board of the device. With the goal.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has the following configuration.
[0014]
The invention according to claim 1 of the present invention comprises a resin base member and a sheet metal antenna element fixed to the base member and having a connection portion protruding to the side of the base member. The base portion is positioned at a position separated by a predetermined distance from the wiring board of the device to be used by a position control portion or the like provided in the housing of the device to be used, and is arranged in parallel with the wiring board, and In the mounted state, a connection portion of the antenna element protruding from the side of the base portion elastically contacts the wiring board to form an antenna electrically connected thereto, and is arranged side by side on the wiring board. Since it can be mounted on a device in this way, it has the effect of contributing to a reduction in the thickness of the device.
[0015]
According to a second aspect of the present invention, in the first aspect of the invention, the antenna element is a monopole type configured in a zigzag folded state. By constructing a folded pattern in consideration of capacitive coupling and the like having a short electrical length, the area required for the antenna element and the area for disposing the antenna element can be reduced, and the curved base is formed. The shape of the antenna element can be easily processed so as to conform to the surface of the portion, and the effect is that the volume saving of the antenna itself can be easily realized.
[0016]
According to a third aspect of the present invention, in the second aspect of the present invention, the side portion of the base portion facing the outer side of the housing of the device to be used in the mounted state is formed in a shape promoted by the housing shape. In addition to the operation according to the second aspect of the present invention, the antenna having the shape promoted by the housing shape can be mounted compactly in the housing and can contribute to further miniaturization of the equipment used. Have.
[0017]
According to a fourth aspect of the present invention, in the first aspect of the present invention, a protruding restricting portion is provided on a side portion of the base portion facing the wiring board to keep the base portion at a fixed distance from the wiring board. By mounting the antenna in a state in which the protruding restricting portion is in contact with the end surface of the wiring board of the device to be used or with a slight predetermined gap, the parallel arrangement state of the antenna and the wiring board is ensured. Since the position accuracy can be maintained and the positional accuracy of the connection portion of the antenna element with respect to the wiring board is improved, the electrical connection state when the antenna is mounted is further stabilized.
[0018]
According to a fifth aspect of the present invention, in the first aspect of the invention, the antenna element has a coil shape and has a connecting portion at one end of the coil. In the same manner as the operation by the antenna, it is easy to configure the antenna element to have a required electric length within a small volume, so that the antenna element can have a small volume.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 5.
[0020]
(Embodiment)
1 is an external perspective view of the antenna according to one embodiment of the present invention from the front, FIG. 2 is an external perspective view of the antenna from the rear, and FIG. 3 is a top view showing a state where the antenna is arranged in a housing of a wireless device. In the figure, reference numeral 21 denotes a base portion formed of a molding resin, and an antenna element 31 formed by stamping a thin metal plate having elasticity is fixed to the base portion 21.
[0021]
The base portion 21 is formed in a horizontally long substantially rectangular parallelepiped shape in which the center position is curved so as to protrude slightly forward, and both ends of the rear side surface portion 22 have projections each having an engagement through hole. A part 41 is provided.
[0022]
A band 32 of the antenna element 31 is fixed to one end of the base 21 by insert molding or caulking.
[0023]
The strip 32 is fixed to the rear side 22 and the upper surface 23 of the base 21 and the front side 24 facing the rear side 22 with the same width.
[0024]
Note that the strip 32 is not formed on the lower surface 25 of the base 21 formed on a flat surface.
[0025]
The antenna element 31 extends from a position below the front side surface portion 24 of the base portion 21 in the strip portion 32 and extends in a branch shape along the longitudinal direction of the base portion 21 in parallel with the lower surface portion 25. It has one element part 33.
[0026]
In the first element portion 33, a plurality of narrow branch portions 33A are arranged in parallel with the lower surface portion 25, and the branch portions 33A are connected to the other end portion side of the base portion 21 side. It is configured by a so-called monopole-type folded pattern which is vertically connected by a connecting portion 33B at an intermediate portion.
[0027]
The spacing between the branch portions 33A of the first element portion 33 and the position of the connection portion 33B are configured in consideration of capacitive coupling and the like according to the frequency band to be transmitted and received.
[0028]
The first element section 33 and the like can be easily and accurately formed in a desired shape by punching a metal plate, so that the production efficiency is high.
[0029]
Since the first element portion 33 is compactly folded in a zigzag shape on the same plane on the front side surface portion 24, the area where the first element portion 33 is provided is small. As a result, the base portion 21 also becomes a substantially rectangular parallelepiped having a smaller volume than the conventional one.
[0030]
In addition, the first element portion 33 can be easily formed into a curved surface, and the center position of the first element portion 33 is a curved surface shape that matches the external shape of the equipment to be used, such as the front side surface portion 24 that is curved to protrude slightly forward. Even if the shape of the arrangement surface of the portion 33 is configured, the first element portion 33 can be easily arranged along the arrangement surface.
[0031]
The antenna element 31 also has a second element portion 34 extending from the portion of the band portion 32 located on the upper surface portion 23 to a position near the middle position on the other end side along the upper surface portion 23. ing.
[0032]
Further, one connecting portion 35 is formed at a portion corresponding to the rear side surface portion 22 of the belt-shaped portion 32.
[0033]
The connecting portion 35 has a tongue shape having elasticity and includes an elastic arm portion 35A having a predetermined width connected to the band-shaped portion 32 and a distal end portion 35B. The distal end portion 35B has a flat surface of a predetermined area or a projecting portion. When the antenna is not mounted, the distal end portion 35B is located lower than the lower surface portion 25 of the base portion 21.
[0034]
The built-in type antenna configured as described above according to the present embodiment is mounted on a wireless device to be used as shown in FIG. 3. The mounting state on the device will be described.
[0035]
As shown in the figure, the housing 51 on the lower side of the device has a substantially rectangular shape in a top view, which is formed in a curved shape so that the central part on the front side (corresponding to the upper side in the figure) slightly projects. The wiring board 52 of the device is positioned and accommodated in a box-shaped opening except for the internal space at the front part.
[0036]
It is to be noted that various electronic components and the like for operating the device are mounted on the wiring board 52, and an upper housing or the like serving as an operation portion as the device is also required. Omitted.
[0037]
In the antenna described above, the base unit 21 is arranged in parallel at a predetermined distance away from the wiring board 52 at a front portion of the housing 51 where the wiring board 52 is not provided. It is housed and held.
[0038]
At this time, the antenna is arranged such that the first element unit 33 side is directed to the front side of the housing 51, that is, to the outer side, and in this state, the position regulating unit of the housing 51 provided for antenna position regulation is provided. The central portion of the rear side surface portion 22 of the base portion 21 is mounted such that its position is regulated in the rearward and leftward and rightward directions.
[0039]
Since the rear side portion 22 of the antenna has a shape in which a center position protrudes forward, a predetermined space can be provided in a rear portion of the rear side portion 22 in the above-described arrangement state, and the space is formed. The convex portion 51A that regulates the antenna position can be easily arranged, and the device can be configured with high area efficiency.
[0040]
At this time, the front surface side of the convex portion 51A that regulates the antenna position is formed in a shape corresponding to the rear side surface portion 22, and one convex portion 51A including the central portion of the rear side surface portion 22 includes the left and right directions. The position may be regulated.
[0041]
In addition, since a predetermined space can be provided near both ends of the front side surface portion 24 of the antenna, a convex portion for regulating the antenna position may be provided in this space to regulate the antenna position.
[0042]
When in the above-described arrangement state, the respective projections 41 provided on the rear side surface portion 22 of the antenna are respectively mounted on two locking projections 53 provided on the housing 51. A screw (not shown) is screwed from above each projection 41, and each projection 41 and each locking projection 53 are locked.
[0043]
The connection portion 35 of the antenna element 31 is electrically connected to the signal pattern portion 52A disposed on the wiring board 52 by elastically contacting the distal end portion 35B.
[0044]
At this time, the upper surface of the wiring board 52 is incorporated so as to be located at a position higher than the lower surface portion 25 of the antenna. A predetermined elastic contact force is generated when the elastic arm portion 35A of the elastic member 35 is bent upward, and the elastic contact portion can be stably connected by the elastic contact force. If a protrusion or unevenness is provided on 35B, the contact can be a point contact, which is more preferable.
[0045]
The wireless device equipped with the antenna according to the present embodiment configured as described above transmits and receives radio waves of a predetermined frequency band set in advance via the antenna.
[0046]
For example, when receiving a radio wave, the first and second element units 33 and 34 function to receive the radio wave, which is transmitted to the signal pattern unit 52A of the wiring board 52 via the connection unit 35, A predetermined process is performed by a control unit (not shown) arranged on the wiring board 52, and a function according to a reception state is operated.
[0047]
On the other hand, when transmitting a radio wave, a signal transmitted from the signal pattern portion 52A of the wiring board 52 is transmitted to the first and second element portions 33 and 34 via the connection portion 35 and transmitted as a radio wave.
[0048]
At this time, the antenna is provided with the first element unit 33 and the second element unit 34, and the respective electrical lengths are set to different lengths, so that the antenna is favorably provided in at least two frequency bands. It can be transmitted and received.
[0049]
As described above, since the antenna according to the present embodiment has a small volume that can be arranged with good area efficiency when the device is mounted on the housing 51, the antenna can contribute to downsizing of the device, and the mounting state of the antenna is as follows. Since the electrical conduction can be achieved by directly mounting on the bottom surface of the housing 51 instead of on the wiring substrate 52, the thickness of the housing 51, that is, the thickness of the entire device can be easily reduced. That is, the effect of being able to do so is obtained.
[0050]
In the above, an example has been described in which the antenna includes the first element portion 33 and the second element portion 34, but the number, shape, material, and the like of the element portions are not limited at all.
[0051]
For example, as shown in the external perspective view of FIG. 4, the antenna element 61 may be a conductive coil having a connecting portion 61A at one end side and fixed to a rod-shaped base portion 62. In addition, the antenna element portion having a necessary electric length can be made compact, and can be made small.
[0052]
The mounting state of the coiled antenna on the device is the same as that of the above-described monopole type antenna. The antenna is arranged in parallel with the wiring board 52, and the connecting portion 61A is connected to the signal pattern portion. Since a screw (not shown) is screwed and mounted from above the protrusion 62A so as to be in elastic contact with the 52A, the same effect as reducing the thickness of the device can be obtained.
[0053]
The method of fixing the antenna to the housing 51 or the like may be other than screwing. The antenna is attached to the wiring board 52 at least in a state where the parallel arrangement relationship with the wiring board 52 is securely maintained. And the antenna connection portion 35 (61A) of the antenna stably comes into contact with the signal pattern portion 52A.
[0054]
Further, in order to further ensure the state of restricting the position of the antenna in the housing 51, for example, as shown in a top view of FIG. Also, on the antenna side, a rectangular frame-shaped protruding restricting portion 71 is provided on the rear side surface portion 22 of the base portion 21, and the rear surface 71 </ b> A abuts on the end surface of the wiring board 52 or has a slight gap. What is necessary is just to mount it in a state.
[0055]
In this case, it is possible to ensure that the parallel arrangement of the antenna and the wiring board 52 is maintained by the protruding restricting section 71, and that the positional accuracy of the connection section 35 of the antenna element 31 with respect to the wiring board 52 is improved. Therefore, the electrical connection state when the antenna is mounted is further stabilized.
[0056]
【The invention's effect】
As described above, the antenna of the present invention has a small volume and does not need to be arranged on the wiring board of the device, and has an advantageous effect of contributing to a reduction in the thickness of the device.
[Brief description of the drawings]
FIG. 1 is an external perspective view of an antenna according to an embodiment of the present invention from the front. FIG. 2 is an external perspective view of the antenna from the rear. FIG. FIG. 4 is an external perspective view of an antenna having an antenna element portion of another shape from the rear. FIG. 6 is an external perspective view of a conventional built-in type antenna. FIG. 7 is a top view showing a state where the antenna is arranged in a housing of a wireless device.
21, 62 Base part 22 Back side part 23 Top side part 24 Front side part 25 Lower side part 31, 61 Antenna element 32 Band part 33 First element part 33A Branch part 33B Connection part 34 Second element part 35, 61A Connection part 35A Elastic arm section 35B Tip section 41, 62A Projection section 51 Housing 51A Projection section 52 Wiring board 52A Signal pattern section 53 Locking projection 71 Protrusion regulating section 71A Rear surface

Claims (5)

樹脂製の基体部と、上記基体部に固定され、上記基体部の側方に突出した接続部を備えた板金製のアンテナ素子とからなり、上記基体部は、使用機器の筐体に設けられた位置規制部などによって使用機器の配線基板に対して所定間隔離れた位置に位置規制されて、上記配線基板と並列的に並べて配されると共に、その装着状態において上記基体部の側方から突出した上記アンテナ素子の接続部が上記配線基板に対して弾接して電気的接続されたアンテナ。It is composed of a resin base member and a sheet metal antenna element having a connection portion fixed to the base member and protruding to the side of the base member. Position is regulated by a position regulating unit or the like at a predetermined distance from the wiring board of the equipment to be used, and is arranged in parallel with the wiring board, and protrudes from the side of the base in the mounted state. An antenna in which the connecting portion of the antenna element is elastically contacted with the wiring board to be electrically connected. アンテナ素子が、ジグザク状の折り返し状態に構成されたモノポールタイプのものである請求項1記載のアンテナ。2. The antenna according to claim 1, wherein the antenna element is a monopole type formed in a zigzag folded state. 装着状態で使用機器の筐体の外方側に向く基体部の側面部が、上記筐体形状に促した形状に構成された請求項2記載のアンテナ。The antenna according to claim 2, wherein a side surface of the base portion facing the outer side of the housing of the device to be used in the mounted state is formed in a shape promoted by the housing shape. 基体部の配線基板側に向く側面部に、上記基体部を上記配線基板と一定距離に保つための突状規制部を設けた請求項1記載のアンテナ。2. The antenna according to claim 1, wherein a projection-shaped restricting portion is provided on a side portion of the base portion facing the wiring board to keep the base portion at a fixed distance from the wiring board. アンテナ素子が、コイル状の形状で、そのコイルの一方側の端部に接続部を有する請求項1記載のアンテナ。The antenna according to claim 1, wherein the antenna element has a coil shape and has a connection portion at one end of the coil.
JP2003002043A 2003-01-08 2003-01-08 Antenna Pending JP2004215149A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2003002043A JP2004215149A (en) 2003-01-08 2003-01-08 Antenna
CNB2003101249193A CN100337367C (en) 2003-01-08 2003-12-25 Antenna and wireless equipment utilizing same
DE200410001354 DE102004001354A1 (en) 2003-01-08 2004-01-08 Antenna for mobile telephone etc. has metal antenna element with connection part extending from side of substrate confined to predetermined position spaced apart from wiring board

Applications Claiming Priority (1)

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JP2003002043A JP2004215149A (en) 2003-01-08 2003-01-08 Antenna

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JP2006080721A (en) * 2004-09-08 2006-03-23 Nec Corp Antenna device and portable radio device
JP2006211634A (en) * 2004-12-27 2006-08-10 Matsushita Electric Ind Co Ltd Antenna
JP2008010981A (en) * 2006-06-27 2008-01-17 Fujitsu Ltd Mobile terminal
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KR100935954B1 (en) 2009-04-23 2010-01-12 삼성전기주식회사 Case of electronic device, method and mould for manufacturing the same, and mobile communication terminal
KR100955510B1 (en) 2009-04-23 2010-04-30 삼성전기주식회사 Antenna pattern frame, method and mould for manufacturing the same
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WO2006025312A1 (en) * 2004-08-30 2006-03-09 Mitsubishi Materials Corporation Radio communication module and radio communication device
JP2006080721A (en) * 2004-09-08 2006-03-23 Nec Corp Antenna device and portable radio device
JP2006211634A (en) * 2004-12-27 2006-08-10 Matsushita Electric Ind Co Ltd Antenna
JP2008010981A (en) * 2006-06-27 2008-01-17 Fujitsu Ltd Mobile terminal
JP4705527B2 (en) * 2006-06-27 2011-06-22 富士通株式会社 Mobile terminal device
KR100905362B1 (en) 2006-10-10 2009-07-01 파나소닉 주식회사 Antenna device and method of manufacturing the same

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CN1523707A (en) 2004-08-25
CN100337367C (en) 2007-09-12
DE102004001354A1 (en) 2004-07-29

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