JP4529497B2 - antenna - Google Patents

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Publication number
JP4529497B2
JP4529497B2 JP2004074068A JP2004074068A JP4529497B2 JP 4529497 B2 JP4529497 B2 JP 4529497B2 JP 2004074068 A JP2004074068 A JP 2004074068A JP 2004074068 A JP2004074068 A JP 2004074068A JP 4529497 B2 JP4529497 B2 JP 4529497B2
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Prior art keywords
antenna
joint
cover
synthetic resin
portable wireless
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JP2005268863A (en
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清雄 平工
健 柴田
智 小野崎
博史 高城
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NEC Corp
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NEC Corp
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Description

本発明はアンテナに関し、特に、携帯無線機に突出して取り付けられるアンテナの構造に関する。   The present invention relates to an antenna, and more particularly, to an antenna structure that protrudes and is attached to a portable wireless device.

従来、携帯無線機は筐体１の外部又は内部にアンテナを設け、アンテナから電波を放射し、アンテナにより電波を捕捉して送受信を行っていた。特に、携帯電話機では、図３に示すように、携帯電話機の筐体１の上部から突出するアンテナ２を備えている。そして、アンテナのカバーは同一の絶縁材料で覆われている（例えば、特許文献１参照。）。
特開２００２−３５９５１４号公報 Conventionally, portable wireless devices have been provided with an antenna outside or inside the housing 1, radiated radio waves from the antenna, and captured and received radio waves by the antenna. In particular, as shown in FIG. 3, the cellular phone includes an antenna 2 that protrudes from the upper part of the casing 1 of the cellular phone. And the cover of the antenna is covered with the same insulating material (for example, refer patent document 1).
JP 2002-359514 A

携帯電話機は持ち運ばれて使用されるものであり、使用時に落下され、強い衝撃を受ける可能性がある。前述した携帯電話機では、携帯電話機の筐体１の上部からアンテナ２が突出しているので、落下衝撃によってアンテナ２が破損する問題があった。   A mobile phone is carried and used, and is dropped during use and may receive a strong impact. In the above-described mobile phone, since the antenna 2 protrudes from the upper part of the housing 1 of the mobile phone, there is a problem that the antenna 2 is damaged by a drop impact.

本発明は、耐衝撃性が強く、耐久性が高いアンテナを提供することを目的とする。   An object of the present invention is to provide an antenna having high impact resistance and high durability.

第１の発明は、アンテナエレメントを覆う硬質の合成樹脂で構成されたカバーを備えたアンテナにおいて、前記カバーの内側には、前記カバーを構成する合成樹脂より軟質の合成樹脂によって構成された円筒形のジョイントが設けられ、前記ジョイントが携帯無線機の筐体に挿入されることによって携帯無線機の筐体に取り付けられ、前記ジョイントの内部には金属製の接続金具が設けられ、該接続金具が前記アンテナエレメントと電気的に接続されたことを特徴とする。 1st invention is the antenna provided with the cover comprised by the hard synthetic resin which covers an antenna element, The cylindrical shape comprised by the synthetic resin softer than the synthetic resin which comprises the said cover inside the said cover The joint is attached to the case of the portable wireless device by being inserted into the case of the portable wireless device, and a metal connection fitting is provided inside the joint. The antenna element is electrically connected to the antenna element .

第２の発明は、前記ジョイントの下部の略３分の１乃至略３分の２は前記カバーの下部から露出していることを特徴とする。   According to a second aspect of the invention, approximately one-third to approximately two-thirds of the lower portion of the joint is exposed from the lower portion of the cover.

第３の発明は、前記ジョイントは先端の厚みが薄い円筒形であることを特徴とする。   In a third aspect of the invention, the joint has a cylindrical shape with a thin tip.

第４の発明は、前記ジョイントを構成する合成樹脂は曲げ強度が１０ＭＰａ以下であって、前記カバーを構成する合成樹脂は曲げ強度が２０ＭＰａより大きいことを特徴とする。   A fourth invention is characterized in that the synthetic resin constituting the joint has a bending strength of 10 MPa or less, and the synthetic resin constituting the cover has a bending strength of greater than 20 MPa.

本発明では、アンテナエレメントを覆う硬質の合成樹脂で構成されたカバーを備えたアンテナにおいて、前記カバーの内側には、前記カバーを構成する合成樹脂より軟質の合成樹脂によって構成された円筒形のジョイントが設けられ、前記ジョイントが携帯無線機の筐体に挿入されることによって携帯無線機の筐体に取り付けられるので、携帯無線機の筐体の上部から突出して取り付けられたアンテナが横方向から強い衝撃を受けたときにも破損し難くなる。   In the present invention, in an antenna having a cover made of a hard synthetic resin that covers the antenna element, a cylindrical joint made of a synthetic resin softer than the synthetic resin constituting the cover is provided inside the cover. Since the joint is attached to the portable radio device case by being inserted into the case of the portable wireless device, the antenna that protrudes from the upper part of the portable wireless device case is strong from the side. It is hard to break when shocked.

また、前記ジョイントの下部の略３分の１乃至略３分の２は、前記カバーの下部から露出しているので、このジョイントの下部のカバーに覆われていない部分によってアンテナの低い剛性を保つことができる。   Further, since about one-third to about two-thirds of the lower portion of the joint is exposed from the lower portion of the cover, the low rigidity of the antenna is maintained by the portion not covered by the lower cover of the joint. be able to.

次に、本発明の実施の形態について図面を参照して説明する。   Next, embodiments of the present invention will be described with reference to the drawings.

図１は、本発明の実施の形態のアンテナの側面図である。   FIG. 1 is a side view of an antenna according to an embodiment of the present invention.

本発明の実施の形態のアンテナ２には、合成樹脂製の中空のカバー３が設けられており、エレメント５はカバー３によって覆われている。カバー３の下部内側には合成樹脂製のジョイント４が設けられている。ジョイント４の下部には取付金具６が設けられている。   The antenna 2 according to the embodiment of the present invention is provided with a hollow cover 3 made of synthetic resin, and the element 5 is covered with the cover 3. A synthetic resin joint 4 is provided on the lower inner side of the cover 3. A mounting bracket 6 is provided below the joint 4.

カバー３は硬質の合成樹脂（例えば、ＡＢＳ樹脂）で構成されており、剛性が高い。また、ジョイント４は軟質の合成樹脂（例えば、エラストマ樹脂）で構成されており、剛性が低い。このため、アンテナ２に横方向から応力が加わったとしても、軟質の合成樹脂で構成されたジョイント４が変形し、硬質の合成樹脂で構成されたカバー３に強い力が加わって破損し難くなっている。   The cover 3 is made of a hard synthetic resin (for example, ABS resin) and has high rigidity. The joint 4 is made of a soft synthetic resin (for example, an elastomer resin) and has low rigidity. For this reason, even if stress is applied to the antenna 2 from the lateral direction, the joint 4 made of a soft synthetic resin is deformed, and a strong force is applied to the cover 3 made of a hard synthetic resin so that it is difficult to break. ing.

エレメント５はカバー３内に収容されており、導線がコイル状に巻かれたコイルエレメントである。なお、エレメント５はコイルエレメントではなく、誘電体の表面に導体を形成したチップ型のアンテナエレメントであってもよい。   The element 5 is housed in the cover 3 and is a coil element in which a conducting wire is wound in a coil shape. The element 5 may be a chip type antenna element in which a conductor is formed on the surface of a dielectric instead of a coil element.

取付金具６は、アンテナ２内でエレメント５と電気的に接続されている。取付金具６は携帯電話機の筐体１（筐体表面を破線で示す）内に挿入され、取付金具６に設けられた取付穴によって携帯電話機に固定される。また、取付金具６は携帯電話機１内に設けられた送受信回路と電気的に接続されており、アンテナ２に高周波信号を供給している。   The mounting bracket 6 is electrically connected to the element 5 in the antenna 2. The mounting bracket 6 is inserted into the casing 1 of the mobile phone (the casing surface is indicated by a broken line), and is fixed to the mobile phone by mounting holes provided in the mounting bracket 6. The mounting bracket 6 is electrically connected to a transmission / reception circuit provided in the mobile phone 1, and supplies a high frequency signal to the antenna 2.

図２は、本発明の実施の形態のアンテナの断面図である。   FIG. 2 is a cross-sectional view of the antenna according to the embodiment of the present invention.

前述したようにカバー３の下部内側にはジョイント４が設けられている。ジョイント４は先端の厚みが薄い円筒形をしており、剛性が高くならないようにしている。また、ジョイント４の先端は細径となっており、アンテナの外形に影響を与えることなくカバー３とジョイント４との強度を保つことができる。また、ジョイント４の下部の一部（望ましくは、略３分の１から略３分の２）はカバー３に覆われていない。このジョイント４の下部の露出部によって、アンテナ２の低い剛性が維持されている。   As described above, the joint 4 is provided inside the lower portion of the cover 3. The joint 4 has a cylindrical shape with a thin tip, so that the rigidity is not increased. The tip of the joint 4 has a small diameter, and the strength of the cover 3 and the joint 4 can be maintained without affecting the outer shape of the antenna. Further, a part of the lower portion of the joint 4 (preferably approximately one third to approximately two thirds) is not covered by the cover 3. The low rigidity of the antenna 2 is maintained by the exposed portion below the joint 4.

ジョイント４の下部に設けられる取付金具６の上部は太径になっており、ジョイント４の成形後に、取付金具６がジョイント４から脱落しないようになっている。   The upper portion of the mounting bracket 6 provided at the lower portion of the joint 4 has a large diameter so that the mounting bracket 6 does not fall off the joint 4 after the joint 4 is formed.

このアンテナ２は、取付金具６の上部周囲に軟質の合成樹脂によってジョイント４を成型し、その後、ジョイント４の周囲に硬質の合成樹脂によってカバー３を成型して構成される。例えば、ジョイント４を構成する軟質の合成樹脂には曲げ強度が４ＭＰａ程度のエラストマ合成樹脂を用い、カバー３を構成する硬質の合成樹脂には曲げ強度が６０ＭＰａ程度のＡＢＳ合成樹脂を用いるとよい。すなわち、ジョイント４は曲げ強度が１０ＭＰａ以下の合成樹脂を用い、カバー３は曲げ強度が２０ＭＰａより大きい合成樹脂を用いれば、アンテナカバーの強度を確保しつつ、本発明の効果を奏することができる。   The antenna 2 is configured by molding a joint 4 around the upper portion of the mounting bracket 6 with a soft synthetic resin and then molding a cover 3 around the joint 4 with a hard synthetic resin. For example, an elastomer synthetic resin having a bending strength of about 4 MPa may be used for the soft synthetic resin constituting the joint 4, and an ABS synthetic resin having a bending strength of about 60 MPa may be used for the hard synthetic resin constituting the cover 3. That is, if the joint 4 is made of a synthetic resin having a bending strength of 10 MPa or less and the cover 3 is made of a synthetic resin having a bending strength of more than 20 MPa, the effect of the present invention can be achieved while ensuring the strength of the antenna cover.

本発明の実施の形態は携帯無線機に取り付けられるヘリカルアンテナについて説明したが、本発明は、例えば、特開２００３−２３３１４号公報に記載されるような、携帯無線機から引き出し、収納可能なホイップアンテナの先端に取り付けられるヘリカルアンテナにも適用することができる。   Although the embodiment of the present invention has been described with respect to a helical antenna attached to a portable wireless device, the present invention is a whip that can be pulled out and stored from a portable wireless device, as described in, for example, Japanese Patent Application Laid-Open No. 2003-23314. The present invention can also be applied to a helical antenna attached to the tip of the antenna.

以上説明したように本発明の実施の形態では、カバー３を硬質の合成樹脂で高い剛性に構成し、カバー３の内部に設けられ携帯無線機１に係合するジョイント４は軟質の合成樹脂で低い剛性で構成したので、アンテナ２に横方向から強い衝撃を受けたとしても、剛性が低いジョイント４が変形することによって、剛性の高い合成樹脂のカバー３が破損し難くなる。   As described above, in the embodiment of the present invention, the cover 3 is made of a hard synthetic resin and highly rigid, and the joint 4 provided inside the cover 3 and engaged with the portable wireless device 1 is made of a soft synthetic resin. Since the antenna 2 is configured with low rigidity, even if the antenna 2 receives a strong impact from the lateral direction, the joint 4 with low rigidity is deformed, so that the cover 3 made of synthetic resin with high rigidity is hardly damaged.

本発明の実施の形態のアンテナの側面図である。It is a side view of the antenna of an embodiment of the invention. 本発明の実施の形態のアンテナの断面図である。It is sectional drawing of the antenna of embodiment of this invention. 本発明に係るアンテナが適用される携帯無線機の斜視図である。1 is a perspective view of a portable radio device to which an antenna according to the present invention is applied.

符号の説明Explanation of symbols

１ 携帯無線機（筐体）
２ アンテナ
３ カバー
４ ジョイント
５ コイルエレメント
６ 金具 1 Portable radio (housing)
2 Antenna 3 Cover 4 Joint 5 Coil element 6 Metal fitting

Claims (4)

アンテナエレメントを覆う硬質の合成樹脂で構成されたカバーを備えたアンテナにおいて、
前記カバーの内側には、前記カバーを構成する合成樹脂より軟質の合成樹脂によって構成された円筒形のジョイントが設けられ、
前記ジョイントが携帯無線機の筐体に挿入されることによって携帯無線機の筐体に取り付けられ、
前記ジョイントの内部には金属製の接続金具が設けられ、該接続金具が前記アンテナエレメントと電気的に接続されたことを特徴とするアンテナ。 In an antenna with a cover made of hard synthetic resin covering the antenna element,
Inside the cover, a cylindrical joint made of a synthetic resin softer than the synthetic resin constituting the cover is provided,
The joint is attached to the case of the portable wireless device by being inserted into the case of the portable wireless device ,
A metal connection fitting is provided inside the joint, and the connection fitting is electrically connected to the antenna element . 前記ジョイントの下部の略３分の１乃至略３分の２は前記カバーの下部から露出している請求項１に記載のアンテナ。   The antenna according to claim 1, wherein approximately one-third to approximately two-thirds of a lower portion of the joint is exposed from a lower portion of the cover. 前記ジョイントは先端の厚みが薄い円筒形である請求項１又は２に記載のアンテナ。   The antenna according to claim 1, wherein the joint has a cylindrical shape with a thin tip. 前記ジョイントを構成する合成樹脂は曲げ強度が１０ＭＰａ以下であって、前記カバーを構成する合成樹脂は曲げ強度が２０ＭＰａより大きい請求項１から３のいずれか一つに記載のアンテナ。   The antenna according to any one of claims 1 to 3, wherein the synthetic resin constituting the joint has a bending strength of 10 MPa or less, and the synthetic resin constituting the cover has a bending strength of greater than 20 MPa.
JP2004074068A 2004-03-16 2004-03-16 antenna Expired - Fee Related JP4529497B2 (en)

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JP4529497B2 true JP4529497B2 (en) 2010-08-25

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07297619A (en) * 1994-04-25 1995-11-10 Canon Inc Portable radio equipment antenna
JPH09270616A (en) * 1996-03-29 1997-10-14 Oki Electric Ind Co Ltd Antenna mount structure for portable equipment
JPH1065567A (en) * 1996-08-26 1998-03-06 Matsushita Electric Ind Co Ltd Radio communication equipment
JPH10242727A (en) * 1997-02-27 1998-09-11 Yokowo Co Ltd Antenna system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07297619A (en) * 1994-04-25 1995-11-10 Canon Inc Portable radio equipment antenna
JPH09270616A (en) * 1996-03-29 1997-10-14 Oki Electric Ind Co Ltd Antenna mount structure for portable equipment
JPH1065567A (en) * 1996-08-26 1998-03-06 Matsushita Electric Ind Co Ltd Radio communication equipment
JPH10242727A (en) * 1997-02-27 1998-09-11 Yokowo Co Ltd Antenna system

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