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JP4049005B2 - antenna - Google Patents

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Publication number
JP4049005B2
JP4049005B2 JP2003118257A JP2003118257A JP4049005B2 JP 4049005 B2 JP4049005 B2 JP 4049005B2 JP 2003118257 A JP2003118257 A JP 2003118257A JP 2003118257 A JP2003118257 A JP 2003118257A JP 4049005 B2 JP4049005 B2 JP 4049005B2
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JP
Japan
Prior art keywords
antenna element
antenna
cover
cap
core portion
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 - Fee Related
Application number
JP2003118257A
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Japanese (ja)
Other versions
JP2004328211A (en
Inventor
直志 ▲高▼木
晋三 河本
靖洋 川上
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 Corp
Panasonic Holdings Corp
Original Assignee
Panasonic Corp
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 Panasonic Corp, Matsushita Electric Industrial Co Ltd filed Critical Panasonic Corp
Priority to JP2003118257A priority Critical patent/JP4049005B2/en
Priority to CNB2003101204205A priority patent/CN1293669C/en
Priority to KR1020040001168A priority patent/KR20040092375A/en
Publication of JP2004328211A publication Critical patent/JP2004328211A/en
Application granted granted Critical
Publication of JP4049005B2 publication Critical patent/JP4049005B2/en
Anticipated expiration legal-status Critical
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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/72Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72403User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
    • H04M1/72409User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories
    • H04M1/72412User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories using two-way short-range wireless interfaces
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/10Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1016Earpieces of the intra-aural type
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00Details of connection covered by H04R, not provided for in its groups
    • H04R2420/07Applications of wireless loudspeakers or wireless microphones
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10General applications
    • H04R2499/11Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Human Computer Interaction (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、主として携帯電話等の移動体通信用の無線機に使用されるアンテナに関するものである。
【0002】
【従来の技術】
近年、携帯電話等の移動体通信用の無線機に対する需要が急激に高まり、文字情報等のサービスが多様化するに伴い、無線機に求められる性能も厳しくなってきており、それに付随して無線機に搭載されているアンテナも小型軽量化、高感度対応や、広帯域化等が要望されている。
【0003】
このような従来の無線機に搭載されているアンテナについて、図3を用いて説明する。
【0004】
図3は従来のアンテナの断面図であり、同図において、1は銅線や銅合金板材などの導電材料からなるコイル状に構成されたアンテナ素子である。
【0005】
このアンテナ素子1は、ABSなどの絶縁性樹脂からなる棒状のコア部2により所定ピッチを維持するようにして保持されている。
【0006】
そして、コア部2の下部には、下方にネジ部を有する金属製の給電金具3が結合されており、上記アンテナ素子1と給電金具3とは電気的に接続されている。
【0007】
また、コア部2の上端部には、金属製もしくは絶縁性樹脂に金属メッキが施されて構成された見栄えのよい導電性のキャップ4が装飾部品として固着されている。
【0008】
そして、5は、ABSなどの絶縁性樹脂からなる筒状のカバーであり、アンテナ素子1およびコア部2の外周を覆うと共に、その上下端部が、各々キャップ4と給電金具3に固着されている。つまり、上記カバー5の内周と上記コア部2の外周との間で形成される界面の上端位置は、導電性のキャップ4の下端部分で塞がれた構成になっている。
【0009】
以上のように構成される従来のアンテナ6は、完成状態では、側面視で略砲弾形状をなしている。
【0010】
そして、上記従来のアンテナ6は、使用機器である無線機(図示せず)に搭載する際に、給電金具3のネジ部を無線機内部に配された金属製のナット(図示せず)に締め込むことによって、無線機に対し機械的かつ電気的に装着接続される。
【0011】
この搭載状態で、アンテナ素子1で誘起される高周波電流は、給電金具3、金属製のナットを経て無線機内部に配置された所定の回路部に流れるようになり、これによって、無線機としてアンテナ6を介し情報の送受信ができるようになるものであった。
【0012】
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が知られている。
【0013】
【特許文献1】
特開平4−134906号公報
【0014】
【発明が解決しようとする課題】
しかしながら上記従来のアンテナ6においては、人が無線機を握って操作する際、例えばその操作用ボタンを介して人体に帯電した静電気が機器筐体内の回路部に伝わると、その無線機内部の回路を経て給電金具3およびアンテナ素子1へ伝達されることもあり、この時、アンテナ素子1の上端部と導電性のキャップ4の下端部分との間隔が狭いと、アンテナ素子1に通じた静電気がアンテナ素子1の上端部から、コア部2とカバー5との間の界面を伝わってキャップ4放電され、そうなると過大な電流が流れ無線機内部のICなどを破損する可能性があることも考慮され、コア部2とカバー5との間の界面の上端位置が導電性のキャップ4の下端部分で塞がれる構成とする場合については、アンテナ素子1の上端部と導電性のキャップ4の下端部分との間の間隔としては、一定以上の設定寸法が必要で、当該構成のアンテナ6において小型化の阻害要因ともなっていた。
【0015】
本発明は、このような従来の課題を解決するものであり、アンテナ素子を固定するコア部とその外周を覆うカバーにより形成される界面の上端位置が導電性のキャップの下端部分で上方から塞がれる構成とされたキャップ付きのアンテナにおいて、上記アンテナ素子の上端部と上記導電性のキャップの下端部分との間の位置にあたる上記界面箇所に静電気対策を施したアンテナを提供することを目的とする。
【0016】
【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。
【0017】
本発明の請求項1に記載の発明は、アンテナ素子と、上記アンテナ素子を外周面に固定する棒状の絶縁樹脂製のコア部と、上記アンテナ素子を固定した上記コア部の外周を覆う絶縁性の筒状に形成されたカバーと、上記カバーの内周と上記コア部の外周間で形成される界面の上端位置を下端部分で塞ぐようにして配された導電性のキャップとを備え、上記アンテナ素子の上端部上の位置にあたる上記コア部の外周位置に凹部または凸部を設け、そこに上記カバーの内周に設けた凸部または凹部を嵌め合わせた構成とすることによって、上記アンテナ素子の上端部と上記キャップの下端部分との間の位置において、上記カバーと上記コア部との間で形成される界面が屈曲した長い距離のものとされて当該界面箇所に沿う上記アンテナ素子の上端部と上記キャップの下端部分の間での静電気の伝達を抑えたものとしたことを特徴とするアンテナとしたものである。当該構成であれば、アンテナ素子を固定するコア部とその外周を覆うカバーにより形成される界面の上端位置が導電性のキャップの下端部分で上方から塞がれる構成とされたキャップ付きのアンテナであっても、アンテナ素子の上端部とキャップの下端部分との間の上記界面箇所の沿面距離を屈曲した長いものにできると共に、その界面部分に設けられた樹脂からなる凸部は直線的に伝わる静電気に対しては遮蔽部の役目をするので、アンテナ素子の上端部とキャップの下端部分との間で上記界面箇所に沿って静電気が飛び難いものにでき、その間の寸法を小さく 設定して外形の小型化を図ることも可能になるという作用を有する。
【0018】
請求項に記載の発明は、請求項1記載の発明において、カバーが、インサート成形によって構成されたものであり、インサート成形でカバーを構成すると、カバーとコア部との密着度合いが向上するため、より静電気の導電路を塞いだものとすることが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2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断面図であり、同図において、11は銅線や銅合金板材などの導電材料からなるコイル状に構成されたアンテナ素子、12はアンテナ素子11を所定ピッチを維持して保持するABSなどの絶縁性樹脂からなる棒状のコア部で、そのコア部12の下部にネジ部を有する金属製の給電金具13が結合され、アンテナ素子11と給電金具13とは電気的に接続されている。
【0021】
そして、コア部12の上端部には、金属製もしくは絶縁性樹脂に金属メッキが施されて構成された見栄えのよい導電性のキャップ14が装飾部品として固着されている。
【0022】
上記のアンテナ素子11およびコア部12の外周部分は、ABSなどの絶縁性樹脂からなる円筒部としてのカバー15で被覆され、カバー15の上下端部は、各々キャップ14と給電金具13に固着されている。
【0023】
そして、コア部12には、アンテナ素子11の上方の端部11Aとキャップ14の下方部分との間の上部位置に、凹部12Aが設けられ、また、その凹部12Aに対応するカバー15の内面位置には凸部15Aが設けられており、上記凹部12Aに凸部15Aが嵌め込まれて本実施の形態によるアンテナ16は構成されている。
【0024】
以上のように構成される本実施の形態による外形略砲弾状のアンテナ16は、給電金具13のネジ部を無線機(図示せず)内部に配された金属製のナット(図示せず)に締め込むことによって機械的かつ電気的に無線機に装着される。
【0025】
この搭載状態で、アンテナ素子11で誘起される高周波電流は、給電金具13、金属製のナットを経て無線機内部に配置された所定の回路部に流れ、これにより、無線機としてアンテナ16を介し情報の送受信が可能となるものである。
【0026】
そして、本実施の形態によるアンテナ16は、アンテナ素子11の上方の端部11Aとキャップ14の下方部分との間のコア部12の上部位置に設けた凹部12Aに対し、カバー15の内面に設けた凸部15Aを嵌め込んだ構成であるため、当該箇所においては、コア部12外周とカバー15内周との界面が上下方向では屈曲した長いものとなり、アンテナ素子11の上方の端部11Aと上記界面の上端部を塞ぐキャップ14の下端部分との導電性部材間の上記界面箇所の沿面距離が長く構成されたものにでき、アンテナ素子11の上方の端部11Aとキャップ14の下端部分の間で上記界面箇所に沿って静電気が飛び難いものにできる。また、当該界面箇所に設けられた樹脂からなる凸部15Aは、直線的に伝わる静電気に対しては遮蔽部の役目をするようになる。
【0027】
この凹凸の嵌め合い構造としたために、例えば無線機の操作時に人体に帯電した静電気が無線機の操作用ボタンを介して無線機内部の回路部に伝わり、その無線機の内部の回路を経て給電金具13に伝わって、給電金具13からアンテナ素子11へ流れても、アンテ ナ素子11の上方の端部11A上の、コア部12とカバー15との間の界面箇所が屈曲した長い距離のものになっているため、アンテナ素子11の上方の端部11Aから当該界面箇所に沿っての静電気の伝達が抑えられてキャップ14まで伝わりにくくでき、簡単な構造で静電気対策が図られたキャップ14を有する装飾性に優れた高品質のアンテナ16を安価に実現できる。
【0028】
そして、反対に例えば外装のキャップ14に指などが触れてしまっても、外装のキャップ14側から静電気も、同様にコア部12とカバー15との間の界面の上端部を塞ぐように配されたキャップ14の下端部から、上記界面箇所に沿ってアンテナ素子11の上方の端部11Aに飛び難くなるため、アンテナ素子11に繋がる使用機器への配線基板などに対する静電気の影響も低減できる。
【0029】
なお、上述のようにアンテナ16における静電気の影響が低減できるため、アンテナ素子11とキャップ14との導電性部材間の配置距離も低減してアンテナ16の外形を小形化することも可能となる。
【0030】
また、筒状部であるカバー15を形成する方法として、コイル状のアンテナ素子11を外周に配した棒状のコア部12を成形金型にセットして、絶縁性樹脂でインサート成形してカバー15を形成することにより、コア部12の凹部12Aとカバー15の凸部15Aとの密着度合いが向上するので、より静電気の導電路が塞がれた確実な静電気対策が図られたものに安価にできる。
【0031】
なお、コア部12の凹部12Aとカバー15の凸部15Aとを逆転させて、コア部12側に凸部、カバー15側に凹部を設けたもの、あるいは凹凸部を双方それぞれに設けて嵌め合わせるようにしても、アンテナ素子11とキャップ14との沿面距離を長くすることができるので同様な静電気対策効果が得られる。
【0032】
また、本実施の形態では、コア部12の凹部12Aおよびカバー15の凸部15Aは、一部分に設けたもので説明したが、図2に示すように、コア部21の棒状の外周面全面に凹部21Aおよびそれに対応するカバー22の内周面の全周に凸部22Aを設けたアンテナ23としても同様の効果が得られる。
【0033】
さらに、静電気対策構造としては、上記に説明した構造以外であってもよく、導電性の見栄えのよいキャップを備えたアンテナにおいて、当該キャップとアンテナ内に保持してあるアンテナ素子の間に絶縁性を拡充するための構造を備えたものは本発明の範疇に入り、また、アンテナ素子などの形状もコイル状に限定されることはなく、さらに、その他の部材構成も上記説明以外のものであってもよい。
【0034】
【発明の効果】
以上のように本発明によれば、簡単な構造で静電気対策が図れた導電性キャップ付きのアンテナを得ることができるという有利な効果が得られる。
【0035】
また、アンテナ素子と導電性のキャップとの導電性部材間の配置距離も低減できる分、アンテナの小型化にも寄与できる。
【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断面図
【図2】 同他の構成形態のアンテナの断面図
【図3】 従来のアンテナの断面図
【符号の説明】
11 アンテナ素子
11A 端部
12,21 コア部
12A,21A 凹部
13 給電金具
14 キャップ
15,22 カバー
15A,22A 凸部
16,23 アンテナ
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an antenna mainly used in a radio for mobile communication such as a mobile phone.
[0002]
[Prior art]
In recent years, as the demand for mobile communication wireless devices such as mobile phones has rapidly increased, and the services for character information and the like have diversified, the performance required for wireless devices has become stricter. There is also a demand for smaller and lighter antennas, higher sensitivity, and wider bandwidth.
[0003]
An antenna mounted on such a conventional wireless device will be described with reference to FIG.
[0004]
FIG. 3 is a cross-sectional view of a conventional antenna. In FIG. 3, reference numeral 1 denotes an antenna element configured in a coil shape made of a conductive material such as a copper wire or a copper alloy plate.
[0005]
The antenna element 1 is held so as to maintain a predetermined pitch by a rod-shaped core portion 2 made of an insulating resin such as ABS.
[0006]
A metal power supply fitting 3 having a screw portion below is coupled to the lower portion of the core portion 2, and the antenna element 1 and the power supply fitting 3 are electrically connected.
[0007]
Further, a good-looking conductive cap 4 made of metal or an insulating resin plated with metal is fixed to the upper end portion of the core portion 2 as a decorative part.
[0008]
Reference numeral 5 denotes a cylindrical cover made of an insulating resin such as ABS, which covers the outer periphery of the antenna element 1 and the core portion 2 and whose upper and lower ends are fixed to the cap 4 and the power supply fitting 3 respectively. Yes. That is, the upper end position of the interface formed between the inner periphery of the cover 5 and the outer periphery of the core portion 2 is configured to be blocked by the lower end portion of the conductive cap 4.
[0009]
The conventional antenna 6 configured as described above has a substantially bullet shape in a side view when completed.
[0010]
When the conventional antenna 6 is mounted on a radio device (not shown), which is a device used, the screw portion of the power supply fitting 3 is attached to a metal nut (not shown) disposed inside the radio device. By tightening, it is mechanically and electrically connected to the radio.
[0011]
In this mounted state, the high-frequency current induced in the antenna element 1 flows through a power supply fitting 3 and a metal nut to a predetermined circuit portion arranged inside the radio device, and thereby the antenna as a radio device. 6 can transmit and receive information via the network.
[0012]
As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
[0013]
[Patent Document 1]
Japanese Patent Laid-Open No. 4-134906
[Problems to be solved by the invention]
However, in the above-described conventional antenna 6, when a person grasps and operates the radio device , for example, when static electricity charged on the human body is transmitted to the circuit portion in the device housing via the operation button, the circuit inside the radio device is operated. In this case, if the distance between the upper end portion of the antenna element 1 and the lower end portion of the conductive cap 4 is narrow, static electricity that has passed through the antenna element 1 is generated. Considering that the upper end of the antenna element 1 is transferred to the cap 4 along the interface between the core 2 and the cover 5, and if so, an excessive current flows and may damage the IC inside the radio. is, the core portion 2 and the case of the closed configurations in lower part the upper end position of the interface of the conductive cap 4 between the cover 5, the upper end portion of the antenna element 1 and the conductive cap 4 The distance between the lower end portion, requires certain level of setting dimensions, has become the antenna 6 of the arrangement with impediments miniaturization.
[0015]
The present invention solves such a conventional problem, and the upper end position of the interface formed by the core portion for fixing the antenna element and the cover covering the outer periphery thereof is closed from above by the lower end portion of the conductive cap. intended to have in the structure and antennas with a cap which provides antenna measures for electrostatic discharge (ESD) to the surface portion corresponding to a position between the upper and lower portions of the conductive cap of the antenna element And
[0016]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has the following configuration.
[0017]
According to the first aspect of the present invention, the antenna element, the rod-shaped insulating resin core portion that fixes the antenna element to the outer peripheral surface, and the insulating property that covers the outer periphery of the core portion that fixes the antenna element. A cover formed in a cylindrical shape, and a conductive cap disposed so as to close the upper end position of the interface formed between the inner periphery of the cover and the outer periphery of the core portion with the lower end portion, The antenna element has a configuration in which a concave portion or a convex portion is provided at an outer peripheral position of the core portion corresponding to a position on the upper end portion of the antenna element, and a convex portion or a concave portion provided on the inner periphery of the cover is fitted therein. The upper end of the antenna element along the interface portion is a long distance where the interface formed between the cover and the core portion is bent at a position between the upper end portion of the cap and the lower end portion of the cap. It to have assumed that suppresses the transmission of static electricity between the lower end portion of the cap is obtained by the antenna, characterized in. If it is the said structure, it is an antenna with a cap by which the upper end position of the interface formed by the core part which fixes an antenna element and the cover which covers the outer periphery was block | closed from the upper part by the lower end part of a conductive cap. Even in this case, the creeping distance of the interface portion between the upper end portion of the antenna element and the lower end portion of the cap can be made long and bent, and the convex portion made of resin provided on the interface portion is transmitted linearly. since for the static electricity to the role of the shielding portion, along the interface locations between the upper end and the lower portion of the cap of the antenna elements can in those difficult jump static electricity, is set smaller therebetween dimensions outline It is possible to reduce the size of the apparatus.
[0018]
Invention according to claim 2, in the invention according to the first aspect, the cover, which has been formed by insert molding, when constituting the cover by insert molding, to improve the adhesion degree between the cover and the core portion Thus, it has an effect that a static electricity conduction path can be blocked.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[0020]
(Embodiment)
FIG. 1 is a cross-sectional view of an antenna according to an embodiment of the present invention, in which 11 is an antenna element configured in a coil shape made of a conductive material such as a copper wire or a copper alloy plate, and 12 is an antenna element 11. Is a rod-shaped core portion made of an insulating resin such as ABS that maintains a predetermined pitch, and a metal power supply fitting 13 having a screw portion is coupled to the lower portion of the core portion 12 so that the antenna element 11 and the power supply fitting 13 is electrically connected.
[0021]
A good-looking conductive cap 14 made of metal or an insulating resin plated with metal is fixed to the upper end portion of the core portion 12 as a decorative part.
[0022]
The outer peripheral portions of the antenna element 11 and the core portion 12 are covered with a cover 15 as a cylindrical portion made of an insulating resin such as ABS, and the upper and lower ends of the cover 15 are fixed to the cap 14 and the power supply fitting 13, respectively. ing.
[0023]
The core portion 12 is provided with a concave portion 12A at an upper position between the upper end portion 11A of the antenna element 11 and the lower portion of the cap 14, and the inner surface position of the cover 15 corresponding to the concave portion 12A. Is provided with a convex portion 15A, and the convex portion 15A is fitted into the concave portion 12A to constitute the antenna 16 according to the present embodiment.
[0024]
The outer shell 16 having the outer shell shape according to the present embodiment configured as described above is provided with a metal nut (not shown) in which the screw portion of the power supply fitting 13 is arranged inside the radio (not shown). By tightening, it is mechanically and electrically attached to the radio.
[0025]
In this mounted state, the high-frequency current induced in the antenna element 11 flows through a power supply fitting 13 and a metal nut to a predetermined circuit unit arranged inside the radio, and thereby via the antenna 16 as a radio. Information can be transmitted and received.
[0026]
The antenna 16 according to the present embodiment is provided on the inner surface of the cover 15 with respect to the concave portion 12A provided at the upper position of the core portion 12 between the upper end portion 11A of the antenna element 11 and the lower portion of the cap 14. 15A, in which the interface between the outer periphery of the core 12 and the inner periphery of the cover 15 is bent and bent in the vertical direction, and the upper end 11A of the antenna element 11 The creeping distance of the interface portion between the conductive member and the lower end portion of the cap 14 that covers the upper end portion of the interface can be increased, and the upper end portion 11A of the antenna element 11 and the lower end portion of the cap 14 It is possible to make static electricity hardly fly along the interface portion. Further, the convex portion 15A made of resin provided at the interface portion serves as a shielding portion against static electricity transmitted linearly .
[0027]
Due to this concave-convex fitting structure, for example , static electricity charged on the human body during operation of the wireless device is transmitted to the circuit unit inside the wireless device via the operation button of the wireless device, and power is supplied through the circuit inside the wireless device. transmitted to bracket 13, also flows from the feeding metal pipe 13 to the antenna element 11, on the upper end portion 11A of the antenna element 11, a long distance interface portion is bent between the core portion 12 and the cover 15 as since the turned in, the from the upper end 11A of the antenna element 11 transmits the static electricity along the interface locations is suppressed can not easily transmitted to the cap 14, the ESD protection is achieved with a simple structure, the cap 14 A high-quality antenna 16 having excellent decorativeness can be realized at low cost.
[0028]
On the other hand, even if , for example, a finger touches the outer cap 14 , static electricity from the outer cap 14 side is also arranged so as to close the upper end of the interface between the core portion 12 and the cover 15. Since it becomes difficult to fly from the lower end portion of the cap 14 to the end portion 11A above the antenna element 11 along the interface portion, the influence of static electricity on a wiring board or the like to a device used connected to the antenna element 11 can be reduced.
[0029]
Since the influence of static electricity on the antenna 16 can be reduced as described above, the arrangement distance between the conductive members of the antenna element 11 and the cap 14 can also be reduced, and the outer shape of the antenna 16 can be reduced in size.
[0030]
Further, as a method of forming the cover 15 that is a cylindrical portion, a rod-shaped core portion 12 having a coiled antenna element 11 arranged on the outer periphery is set in a molding die, and insert-molded with an insulating resin, and then the cover 15 is formed. Since the degree of close contact between the concave portion 12A of the core portion 12 and the convex portion 15A of the cover 15 is improved, the static electricity conducting path is blocked and a reliable countermeasure against static electricity is achieved. it can.
[0031]
In addition, the concave portion 12A of the core portion 12 and the convex portion 15A of the cover 15 are reversed so that the convex portion is provided on the core portion 12 side and the concave portion is provided on the cover 15 side, or the concave and convex portions are provided on both sides. Even if it does so, since the creeping distance of the antenna element 11 and the cap 14 can be lengthened, the same static electricity countermeasure effect is acquired.
[0032]
Further, in the present embodiment, the concave portion 12A of the core portion 12 and the convex portion 15A of the cover 15 have been described as being provided in part, but as shown in FIG. The same effect can be obtained also in the antenna 23 having the concave portion 21A and the convex portion 22A provided on the entire circumference of the inner peripheral surface of the cover 22 corresponding thereto.
[0033]
Further, the anti-static structure may be other than the structure described above, and in an antenna provided with a cap having good conductivity, an insulating property is provided between the cap and the antenna element held in the antenna. Those having a structure for expanding the range are within the scope of the present invention, and the shape of the antenna element and the like is not limited to the coil shape, and other member configurations are other than those described above. May be.
[0034]
【The invention's effect】
As described above, according to the present invention, it is possible to obtain an advantageous effect that it is possible to obtain an antenna with a conductive cap having a simple structure and capable of taking countermeasures against static electricity.
[0035]
Further, since the arrangement distance between the conductive member between the antenna element and the conductive cap can be reduced, the antenna can be reduced in size.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an antenna according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of an antenna having the same configuration. FIG. 3 is a cross-sectional view of a conventional antenna.
DESCRIPTION OF SYMBOLS 11 Antenna element 11A End part 12,21 Core part 12A, 21A Concave part 13 Feeding metal fitting 14 Cap 15,22 Cover 15A, 22A Convex part 16,23 Antenna

Claims (2)

アンテナ素子と、上記アンテナ素子を外周面に固定する棒状の絶縁樹脂製のコア部と、上記アンテナ素子を固定した上記コア部の外周を覆う絶縁性の筒状に形成されたカバーと、上記カバーの内周と上記コア部の外周間で形成される界面の上端位置を下端部分で塞ぐようにして配された導電性のキャップとを備え、上記アンテナ素子の上端部上の位置にあたる上記コア部の外周位置に凹部または凸部を設け、そこに上記カバーの内周に設けた凸部または凹部を嵌め合わせた構成とすることによって、上記アンテナ素子の上端部と上記キャップの下端部分との間の位置において、上記カバーと上記コア部との間で形成される界面が屈曲した長い距離のものとされて当該界面箇所に沿う上記アンテナ素子の上端部と上記キャップの下端部分の間での静電気の伝達を抑えたものとしたことを特徴とするアンテナ。An antenna element, a rod-shaped insulating resin core portion that fixes the antenna element to the outer peripheral surface, an insulating cylindrical cover that covers the outer periphery of the core portion to which the antenna element is fixed, and the cover And a conductive cap disposed so as to close the upper end position of the interface formed between the inner periphery of the antenna portion and the outer periphery of the core portion with the lower end portion, and the core portion corresponding to a position on the upper end portion of the antenna element A recess or a projection is provided at the outer peripheral position of the cover, and a projection or a recess provided on the inner periphery of the cover is fitted therewith, so that the gap between the upper end of the antenna element and the lower end of the cap In this position, the interface formed between the cover and the core portion has a bent long distance between the upper end portion of the antenna element and the lower end portion of the cap along the interface portion. Antenna, characterized in that the that suppresses the transmission of static electricity. カバーが、インサート成形によって構成された請求項記載のアンテナ。 Cover, antenna according to claim 1 wherein constituted by insert molding.
JP2003118257A 2003-04-23 2003-04-23 antenna Expired - Fee Related JP4049005B2 (en)

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CNB2003101204205A CN1293669C (en) 2003-04-23 2003-12-11 Antenna
KR1020040001168A KR20040092375A (en) 2003-04-23 2004-01-08 Antenna

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CN109550131A (en) 2012-12-04 2019-04-02 费雪派克医疗保健有限公司 Medical tube and its manufacturing method
US10814091B2 (en) 2013-10-24 2020-10-27 Fisher & Paykel Healthcare Limited System for delivery of respiratory gases
CN105206929B (en) * 2015-09-02 2019-06-11 深圳市元征软件开发有限公司 The antenna of automotive diagnostic system and the communication device of automotive diagnostic system
JP2018175489A (en) * 2017-04-14 2018-11-15 モリト株式会社 Wireless communication button attached to worn or carried items
CN107023128A (en) * 2017-04-27 2017-08-08 中国南方电网有限责任公司超高压输电公司曲靖局 A kind of anti-static device

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US5086369A (en) * 1990-05-09 1992-02-04 Lin Spencer B Static discharging device
JPH10134986A (en) * 1996-10-31 1998-05-22 Wako:Kk Synthetic material for removing electrostatic stray magnetic wave
JP3835288B2 (en) * 1999-09-28 2006-10-18 セイコーエプソン株式会社 Antenna device for high frequency radio equipment, high frequency radio equipment and watch type radio equipment

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