WO2005101568A1 - Antenna element - Google Patents

Antenna element Download PDF

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Publication number
WO2005101568A1
WO2005101568A1 PCT/JP2005/003965 JP2005003965W WO2005101568A1 WO 2005101568 A1 WO2005101568 A1 WO 2005101568A1 JP 2005003965 W JP2005003965 W JP 2005003965W WO 2005101568 A1 WO2005101568 A1 WO 2005101568A1
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WO
WIPO (PCT)
Prior art keywords
antenna
base
fitting
coil spring
antenna element
Prior art date
Application number
PCT/JP2005/003965
Other languages
French (fr)
Japanese (ja)
Inventor
Fumio Iwasaki
Original Assignee
Nippon Antena Kabushiki Kaisha
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Filing date
Publication date
Application filed by Nippon Antena Kabushiki Kaisha filed Critical Nippon Antena Kabushiki Kaisha
Publication of WO2005101568A1 publication Critical patent/WO2005101568A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/08—Means for collapsing antennas or parts thereof
    • H01Q1/085—Flexible aerials; Whip aerials with a resilient base
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/325—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
    • H01Q1/3275—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted on a horizontal surface of the vehicle, e.g. on roof, hood, trunk

Definitions

  • the present invention relates to an antenna element suitable for being applied to a vehicle-mounted antenna.
  • a roof antenna mounted on a roof is preferred because mounting an antenna on a roof located at the highest position in a vehicle body can increase reception sensitivity.
  • an antenna element is detachably attached to an antenna base fixed to a vehicle body. Therefore, an example of the configuration of the antenna element in the conventional roof antenna is shown in FIG.
  • the antenna element 100 includes a flexible whip element 111 and a bendable element base 112.
  • the whip element 111 has an antenna top 113 formed at the tip, and is configured as a coil-shaped element by winding a conductive wire in a coil shape on an insulating long rod-shaped core material.
  • the base end of the coil-shaped element is fixed to and electrically connected to a metal connecting fitting 11Id, and a flexible coil spring 112b is connected to the connecting fitting 11Id.
  • the lower end of the coil spring 112b is connected to the base fitting 112d.
  • the whip element 111 is electrically connected to the base fitting 112d via the connection fitting 11ld and the coil spring 112b. That is, the area from the whip element 111 to the base fitting 112d operates as an antenna.
  • a screw portion is formed below the base metal fitting 112d, and by screwing this screw portion to an antenna case in which an amplification circuit or the like is built, the reception signal received by the whip element 111 is It is introduced into the vehicle body via a cable guided into the antenna case and led out from the antenna case cover.
  • the antenna element 100 may be broken.
  • the coil spring 112b is provided at the base of the antenna, and the coil spring 112b is bent when subjected to the lateral load. To absorb the impact.
  • This antenna element has a base metal fitting for fixing the antenna element to the mounting part, and a coil spring provided between the base end of the whip element and the base metal fitting.
  • a flexible braided wire that electrically bridges the base metal fitting is provided in the coil spring.
  • Patent Document 1 JP 2001-60820
  • an object of the present invention is to provide an antenna element that can restore its original shape even when severely bent!
  • an antenna element of the present invention has an elongated and conductive rod having elasticity in a coil spring, one end of which is connected to a connecting fitting and the other end is connected to a base fitting.
  • the main feature is that it is inserted.
  • a conductive elongated rod having elasticity is provided in the coil spring, and one end of the rod is inserted into the connecting fitting and the other end is inserted into the base fitting. Even if it is bent, the restoring force is improved so that no bending habit remains.
  • FIG. 1 is a diagram showing a configuration of a vehicle-mounted antenna including an antenna element of the present invention.
  • FIG. 2 is a sectional view showing a detailed configuration of an antenna element according to the present invention.
  • FIG. 3 is a diagram showing an example of a configuration of an antenna element in a conventional roof antenna.
  • FIG. 4 shows a state in which the coil spring is normally bent when the conventional antenna element is bent, and a state in which the coil spring is excessively bent when the conventional antenna element is bent.
  • FIG. 1 shows the configuration of a vehicle-mounted antenna provided with the antenna element of the present invention.
  • a vehicle-mounted antenna 1 is configured such that a flexible antenna element 10 is fixed to an antenna case including a metal antenna base 5 and an antenna cover 3 formed of resin.
  • the antenna element 10 according to the present invention is composed of a whip element 11 having flexibility and an element base 12 which can be bent.
  • the whip element 11 has an antenna top 13 formed at the tip, and a coiled whip element 11 is formed by winding a conductive wire in a coil shape on an insulating long rod-shaped core material.
  • the base end of the element base 12 is detachably fixed to the antenna cover 3 by being screwed to an element mounting bracket provided on the upper part of the antenna cover 3.
  • the antenna cover 3 is fitted to a metal antenna base 5 to form an antenna case, in which a circuit board in which a matching device, an amplifier, and the like are incorporated is held and stored in the antenna base 5.
  • the mounting portion projecting from the lower surface of the antenna base 5 is inserted into an antenna mounting hole opened in the vehicle body, and a screw is screwed into the mounting portion of the antenna base 5 from inside the vehicle body to be mounted on the vehicle body.
  • Antenna 1 is fixed.
  • a pad 4 made of a flexible material such as an elastomer is fitted to the lower end of the antenna base 5 so as to be inserted between the lower surface of the antenna base 5 and the vehicle body.
  • the whip element 11 is composed of a coiled conductor 1 la in which a conductive wire is wound in a coil shape on an insulating long rod-shaped insulating core l ib, and the coiled conductor 1 la is isolated. Covered with 1 lc element cover.
  • the lower end of the insulating core 1 lb is fixed to a metal connecting fitting lid, and the lower end of the coiled conductor 11a is electrically connected to the upper part of the connecting fitting lid.
  • the upper end of the coil spring 12b which can be bent, is fitted and fixed to the lower part of the connection fitting lid.
  • the lower end of the coil spring 12b is fitted and fixed to the upper part of the base fitting 12d.
  • Base fitting 12d to coil spring 12b, connecting fitting l ld, under whip element 11 A base cover 12a made of a flexible synthetic resin is formed so as to cover the portion. Further, a screw portion 12e is formed to extend from a lower portion of the base fitting 12d. The screw portion 12e is a screw portion that is screwed to an element mounting bracket provided on the upper part of the antenna cover 3.
  • a characteristic configuration of the antenna element 10 of the present invention is that a fitting hole is formed at a lower portion of the connection fitting lid, one end of the superelastic alloy 12c is fitted into the fitting hole, and the base fitting 12d is formed. A fitting hole is formed in the upper part, and the other end of the superelastic alloy 12c is fitted into the fitting hole.
  • the superelastic alloy 12c is disposed in the coil spring 12b, and electrically connects the connection fitting lid and the base fitting 12d.
  • the superelastic alloy 12c is a Ni—Ti alloy and has the property of returning to its original shape without remaining strain even when subjected to a large strain exceeding 8%. As described above, since the superelastic alloy 12c has an excellent elastic recovery force, even if the element base 12 is severely bent, the original shape can be restored without remaining distortion.
  • the superelastic alloy 12c is loosely fitted to the connection fitting 1Id and the base fitting 12d so that the element base 12 is easily bent.
  • the whip element 11 is electrically connected to the base metal part 12d via the connection metal part lld and the superelastic alloy 12c.
  • the whip element 11, the connecting fitting lld, the superelastic alloy 12c, and the base fitting 12d operate as an antenna.
  • the received signal received by the antenna element 10 is amplified and the like in the antenna cover 3 and passed through a cable led out from the lower surface of the antenna base 5. It will be introduced into the body.
  • the coil spring 12b is moved to the position shown in FIG. Even if it is bent normally as shown in the figure or excessively bent as shown in Fig. 4 (b), the connecting fitting lid and the base fitting 12d must be electrically connected by the superelastic alloy 12c. Therefore, the antenna element 10 is not affected by the electrical length of the coil spring 12b. That is, even if the element base 12 is bent, the electrical characteristics of the antenna element 10 do not change without being affected by the coil spring 12b. In addition, even if the element base 12 is severely bent by the action of the superelastic alloy 12c, the original The shape is restored.
  • the arrangement in the coil spring 12b is not limited to the superelastic alloy 12c, but may be a conductive rod-shaped body exhibiting superelastic properties such as rubber metal (registered trademark) instead of the superelastic alloy 12c.
  • the antenna element of the present invention is not limited to the radio.
  • the antenna element of the present invention is not limited to the radio, and a part of the helical coil is operated as a trap coil by changing the groove pitch of the helical groove of the support member.
  • a composite antenna for an AMZFMZ mobile phone or the like can be obtained.

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  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)

Abstract

An antenna element capable of being restored to its original shape even if severely bent. A connection metallic member (11d) to which a whip element (11) is fixed and a base metallic member (12d) are connected by a coil spring (12b). An extra elastic alloy (12c) is installed in the coil spring (12b), one end of the extra elastic alloy (12c) is fitted into the connection metallic member (11d), and the other end is fitted into the base metallic member (12d). Even if severely bent, an element base section (12) constructed as above is restored by effect of the extra elastic alloy (12c) to its original shape without having residual strain.

Description

明 細 書  Specification
アンテナエレメント 技術分野  Antenna element technical field
[0001] 本発明は、車載用アンテナに適用して好適なアンテナエレメントに関するものであ る。  The present invention relates to an antenna element suitable for being applied to a vehicle-mounted antenna.
背景技術  Background art
[0002] 車体に取り付けられるアンテナとしては種々のアンテナがある力 車体では最も高 い位置にあるルーフにアンテナを取り付けると受信感度を高められるため、ルーフに 取り付けるルーフアンテナが好まれている。このようなルーフアンテナは、車体に固着 されたアンテナベースに対して、アンテナエレメントを着脱自在に取り付けている。そ こで、従来のルーフアンテナにおけるアンテナエレメントの構成の一例を図 3に示す。  [0002] There are various antennas as antennas to be mounted on a vehicle body. A roof antenna mounted on a roof is preferred because mounting an antenna on a roof located at the highest position in a vehicle body can increase reception sensitivity. In such a roof antenna, an antenna element is detachably attached to an antenna base fixed to a vehicle body. Therefore, an example of the configuration of the antenna element in the conventional roof antenna is shown in FIG.
[0003] 図 3に示すように、アンテナエレメント 100は、可撓性を有するホイップエレメント 11 1と屈曲可能とされたエレメント基部 112とから構成される。ホイップエレメント 111は 先端にアンテナトップ 113が形成されており、絶縁性の長棒状の芯材にコイル状に導 線を卷回することによりコイル状のエレメントとして構成されて 、る。このコイル状のェ レメントの基端は金属製の連結金具 11 Idに固着されて電気的に接続されており、連 結金具 11 Idには屈曲自在とされたコイルスプリング 112bが連結されている。このコ ィルスプリング 112bの下端は基部金具 112dに連結されて 、る。  As shown in FIG. 3, the antenna element 100 includes a flexible whip element 111 and a bendable element base 112. The whip element 111 has an antenna top 113 formed at the tip, and is configured as a coil-shaped element by winding a conductive wire in a coil shape on an insulating long rod-shaped core material. The base end of the coil-shaped element is fixed to and electrically connected to a metal connecting fitting 11Id, and a flexible coil spring 112b is connected to the connecting fitting 11Id. The lower end of the coil spring 112b is connected to the base fitting 112d.
[0004] これにより、ホイップエレメント 111は連結金具 11 ld、コイルスプリング 112bを介し て基部金具 112dに電気的に接続される。すなわち、ホイップエレメント 111から基部 金具 112dまでがアンテナとして動作するようになる。なお、基部金具 112dの下部に はネジ部が形成されており、このネジ部を増幅回路等が内蔵されているアンテナケー スに螺着することにより、ホイップエレメント 111で受信された受信信号は、アンテナケ ース内に導かれアンテナケースカゝら導出されるケーブルを介して車体内に導入され るよつになる。  [0004] As a result, the whip element 111 is electrically connected to the base fitting 112d via the connection fitting 11ld and the coil spring 112b. That is, the area from the whip element 111 to the base fitting 112d operates as an antenna. In addition, a screw portion is formed below the base metal fitting 112d, and by screwing this screw portion to an antenna case in which an amplification circuit or the like is built, the reception signal received by the whip element 111 is It is introduced into the vehicle body via a cable guided into the antenna case and led out from the antenna case cover.
ところで、車載用のアンテナは車体に取り付けられることから、そのアンテナエレメン ト 100に障害物が衝突したり、走行時の風圧により横加重を受ける場合が多い。この 横加重が大き 、場合はアンテナエレメント 100が折損するおそれがあることから、従 来のアンテナエレメント 100ではアンテナ基部にコイルスプリング 112bを設けて、横 加重を受けた際にコイルスプリング 112bが屈曲することにより、その衝撃を吸収する ようにしている。 By the way, since an on-vehicle antenna is mounted on a vehicle body, an obstacle collides with the antenna element 100 or the antenna element 100 is often laterally loaded by wind pressure during traveling. this If the lateral load is large, the antenna element 100 may be broken.Therefore, in the conventional antenna element 100, the coil spring 112b is provided at the base of the antenna, and the coil spring 112b is bent when subjected to the lateral load. To absorb the impact.
[0005] しかしながら、アンテナエレメント 100においては、ホイップエレメント 111から基部 金具 112dまでがアンテナとして動作するのである力 コイルスプリング 112bが屈曲さ れると、コイルスプリング 112bは図 4 (a)に示すように正常に屈曲されたり、過度に屈 曲された場合は図 4 (b)に示すようになる。  [0005] However, in the antenna element 100, when the coil spring 112b, which is the force from the whip element 111 to the base bracket 112d operating as an antenna, is bent, the coil spring 112b becomes normal as shown in Fig. 4 (a). If it is bent or excessively bent, it will be as shown in Fig. 4 (b).
すると、コイルスプリング 112bが屈曲されると図 4 (a) (b)に示すようにコイルスプリン グ 112bの各コイル間の接触が断たれたり、その接触が片側だけで接触するようにな ること力 、コイルスプリング 112bが屈曲された際には、コイルスプリング 112bの電気 長が変化してアンテナエレメント 100の電気的特性が変わってしまうおそれが生じる ようになる。  Then, when the coil spring 112b is bent, the contact between the coils of the coil spring 112b is cut off as shown in FIGS. 4 (a) and 4 (b), or the contact comes to contact only on one side. When the coil spring 112b is bent, the electric length of the coil spring 112b changes, and the electric characteristics of the antenna element 100 may change.
[0006] そこで、これを解決するアンテナエレメントが提案されて ヽる (特許文献 1参照)。  [0006] Therefore, an antenna element that solves this problem has been proposed (see Patent Document 1).
このアンテナエレメントでは、アンテナエレメントを被取付部に固着するための基部 金具と、ホイップエレメントの基端と基部金具との間に設けられたコイルスプリングとを 有しており、ホイップエレメントの基端と基部金具とを電気的に橋絡する可撓性の編 組線をコイルスプリング内に設けるようにしている。これにより、コイルスプリングが屈 曲されて各コイル間の接触状態が変化しても、ホイップエレメントと基部金具とは編組 線で電気的に接続されるようになるため、アンテナエレメント全体の電気的特性が変 化することを防止することができるようになる。  This antenna element has a base metal fitting for fixing the antenna element to the mounting part, and a coil spring provided between the base end of the whip element and the base metal fitting. A flexible braided wire that electrically bridges the base metal fitting is provided in the coil spring. As a result, even if the coil spring is bent and the contact state between the coils changes, the whip element and the base metal fitting are electrically connected by a braided wire, so that the electrical characteristics of the entire antenna element are improved. Can be prevented from changing.
特許文献 1：特開 2001— 60820  Patent Document 1: JP 2001-60820
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0007] し力しながら、上記したアンテナエレメントにおいては、屈曲された際にコイルスプリ ングの弾性により元の形状に復元させている力 S、過酷に屈曲された場合にはコイルス プリングに歪が残留して元の形状に復元できないおそれがあるという問題点があった [0008] そこで、本発明は、過酷に屈曲されても元の形状に復元することのできるアンテナ エレメントを提供することを目的として!/ヽる。 In the antenna element described above, the force S that restores the original shape due to the elasticity of the coil spring when bent, and distortion remains in the coil spring when severely bent. There is a problem that it may not be possible to restore the original shape [0008] Therefore, an object of the present invention is to provide an antenna element that can restore its original shape even when severely bent!
課題を解決するための手段  Means for solving the problem
[0009] 上記目的を達成するために、本発明のアンテナエレメントは、コイルスプリング内に 弾性を有する細長!ヽ導電性の棒状体を配設し、その一端を連結金具に他端を基部 金具に嵌挿するようにしたことを最も主要な特徴として 、る。 [0009] In order to achieve the above object, an antenna element of the present invention has an elongated and conductive rod having elasticity in a coil spring, one end of which is connected to a connecting fitting and the other end is connected to a base fitting. The main feature is that it is inserted.
発明の効果  The invention's effect
[0010] 本発明によれば、コイルスプリング内に弾性を有する導電性の細長 、棒状体を配 設し、その一端を連結金具に他端を基部金具に嵌挿するようにしたことから、過酷に 屈曲されても復元力が向上して曲がり癖が残らないようになる。  [0010] According to the present invention, a conductive elongated rod having elasticity is provided in the coil spring, and one end of the rod is inserted into the connecting fitting and the other end is inserted into the base fitting. Even if it is bent, the restoring force is improved so that no bending habit remains.
図面の簡単な説明  Brief Description of Drawings
[0011] [図 1]本発明のアンテナエレメントを備える車載用アンテナの構成を示す図である。  FIG. 1 is a diagram showing a configuration of a vehicle-mounted antenna including an antenna element of the present invention.
[図 2]本発明にかかるアンテナエレメントの詳細構成を示す断面図である。  FIG. 2 is a sectional view showing a detailed configuration of an antenna element according to the present invention.
[図 3]従来のルーフアンテナにおけるアンテナエレメントの構成の一例を示す図であ る。  FIG. 3 is a diagram showing an example of a configuration of an antenna element in a conventional roof antenna.
[図 4]従来のアンテナエレメントが屈曲された際のコイルスプリングの正常に屈曲され た状態を示す図と、従来のアンテナエレメントが屈曲された際のコイルスプリングの過 度に屈曲された状態を示す図である。  FIG. 4 shows a state in which the coil spring is normally bent when the conventional antenna element is bent, and a state in which the coil spring is excessively bent when the conventional antenna element is bent. FIG.
符号の説明  Explanation of symbols
[0012] 1 車載用アンテナ、 3 アンテナカバー、 4 ノ ッド、 5 アンテナベース、 10 アンテ ナエレメント、 11 ホイップエレメント、 11a コイル状導体、 l ib 絶縁芯、 11c エレ メントカバー、 l id 連結金具、 12 エレメント基部、 12a 基部カバー、 12b コイル スプリング、 12c 超弾性合金、 12d 基部金具、 12e ネジ部、 13 アンテナトップ、 100 アンテナエレメント、 111 ホイップエレメント、 11 Id 連結金具、 112 エレメン ト基部、 112b コイルスプリング、 112d 基部金具、 113 アンテナトップ  [0012] 1 vehicle-mounted antenna, 3 antenna cover, 4 node, 5 antenna base, 10 antenna element, 11 whip element, 11a coiled conductor, lib insulating core, 11c element cover, lid connection bracket, 12 element base, 12a base cover, 12b coil spring, 12c superelastic alloy, 12d base fitting, 12e screw, 13 antenna top, 100 antenna element, 111 whip element, 11 Id connection fitting, 112 element base, 112b coil spring , 112d base bracket, 113 antenna top
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0013] 過酷に屈曲されても元の形状に復元されるアンテナエレメントを提供すると!/、う目的 を、コイルスプリング内に弾性を有する細長い導電性の棒状体を配設し、その一端を 連結金具に他端を基部金具に嵌挿するようにしたことにより実現した。 [0013] To provide an antenna element that is restored to its original shape even when severely bent! / This has been realized by disposing an elongated conductive rod having elasticity in a coil spring, and inserting one end of the rod into a connecting fitting and the other end into a base fitting.
[0014] 本発明のアンテナエレメントを備える車載用アンテナの構成を図 1に示す。  FIG. 1 shows the configuration of a vehicle-mounted antenna provided with the antenna element of the present invention.
図 1に示すように、車載用アンテナ 1は、可撓性を有するアンテナエレメント 10が金 属製のアンテナベース 5と榭脂を成形したアンテナカバー 3からなるアンテナケース に固着されて構成されている。本発明に力かるアンテナエレメント 10は、可撓性を有 するホイップエレメント 11と屈曲可能とされたエレメント基部 12とから構成されて 、る。 ホイップエレメント 11は先端にアンテナトップ 13が形成されており、絶縁性の長棒状 の芯材にコイル状に導線を卷回することによりコイル状のホイップエレメント 11が構成 されて 、る。エレメント基部 12の基端はアンテナカバー 3の上部に設けられたエレメ ント取付金具に螺着されることにより、アンテナカバー 3に着脱自在に固着されている 。このアンテナカバー 3は金属製のアンテナベース 5に嵌着されてアンテナケースを 構成しており、その内部には整合器や増幅器等が組み込まれた回路基板がアンテ ナベース 5に保持されて収納されている。このアンテナベース 5の下面から突出して いる取付部は、車体に空けられたアンテナ取付孔内に挿入されて、車体内部からネ ジをアンテナベース 5の取付部に螺着することにより車体に車載用アンテナ 1が固着 される。なお、アンテナベース 5の下端にはエラストマ一等の柔軟な材質のパッド 4が 嵌着されて、アンテナベース 5の下面と車体との間に介挿されるように設けられている  As shown in FIG. 1, a vehicle-mounted antenna 1 is configured such that a flexible antenna element 10 is fixed to an antenna case including a metal antenna base 5 and an antenna cover 3 formed of resin. . The antenna element 10 according to the present invention is composed of a whip element 11 having flexibility and an element base 12 which can be bent. The whip element 11 has an antenna top 13 formed at the tip, and a coiled whip element 11 is formed by winding a conductive wire in a coil shape on an insulating long rod-shaped core material. The base end of the element base 12 is detachably fixed to the antenna cover 3 by being screwed to an element mounting bracket provided on the upper part of the antenna cover 3. The antenna cover 3 is fitted to a metal antenna base 5 to form an antenna case, in which a circuit board in which a matching device, an amplifier, and the like are incorporated is held and stored in the antenna base 5. I have. The mounting portion projecting from the lower surface of the antenna base 5 is inserted into an antenna mounting hole opened in the vehicle body, and a screw is screwed into the mounting portion of the antenna base 5 from inside the vehicle body to be mounted on the vehicle body. Antenna 1 is fixed. A pad 4 made of a flexible material such as an elastomer is fitted to the lower end of the antenna base 5 so as to be inserted between the lower surface of the antenna base 5 and the vehicle body.
[0015] 次に、本発明に力かるアンテナエレメント 10の詳細構成を断面図で図 2に示す。 Next, a detailed configuration of the antenna element 10 according to the present invention is shown in a sectional view in FIG.
図 2に示すように、ホイップエレメント 11は、絶縁性の長棒状の絶縁芯 l ibに導線を コイル状に卷回したコイル状導体 1 laにより構成されており、コイル状導体 1 laは絶 縁性のエレメントカバー 1 lcにより被覆されて 、る。絶縁芯 1 lbの下端は金属製の連 結金具 l idに固着されており、コイル状導体 11aの下端は連結金具 l idの上部に電 気的に接続されている。この連結金具 l idの下部には屈曲自在とされたコイルスプリ ング 12bの上端が嵌挿されて固着されている。そして、コイルスプリング 12bの下端は 基部金具 12dの上部に嵌挿されて固着されている。  As shown in FIG. 2, the whip element 11 is composed of a coiled conductor 1 la in which a conductive wire is wound in a coil shape on an insulating long rod-shaped insulating core l ib, and the coiled conductor 1 la is isolated. Covered with 1 lc element cover. The lower end of the insulating core 1 lb is fixed to a metal connecting fitting lid, and the lower end of the coiled conductor 11a is electrically connected to the upper part of the connecting fitting lid. The upper end of the coil spring 12b, which can be bent, is fitted and fixed to the lower part of the connection fitting lid. The lower end of the coil spring 12b is fitted and fixed to the upper part of the base fitting 12d.
[0016] 基部金具 12dからコイルスプリング 12b、連結金具 l ld、ホイップエレメント 11の下 部を覆うように柔軟な合成樹脂製の基部カバー 12aが成形されている。また、基部金 具 12dの下部からはネジ部 12eが延伸するよう形成されて 、る。このネジ部 12eは、 アンテナカバー 3の上部に設けられたエレメント取付金具に螺着されるネジ部である 。本発明のアンテナエレメント 10において特徴的な構成は、連結金具 l idの下部に 嵌揷孔が形成されてこの嵌揷孔内に超弾性合金 12cの一端が嵌挿されると共に、基 部金具 12dの上部に嵌揷孔が形成されてこの嵌揷孔内に超弾性合金 12cの他端が 嵌挿されている構成とされている。この場合、超弾性合金 12cはコイルスプリング 12b 内に配設されて、連結金具 l idと基部金具 12dとを電気的に接続している。超弾性 合金 12cは、 Ni— Ti合金であり 8%を越える大きな歪を受けても歪が残ることなく元の 形状に戻る性質を有している。このように、超弾性合金 12cは弾性回復力が優れてい るため、エレメント基部 12が過酷に屈曲されても歪が残ることなく元の形状に復元さ れるようになる。なお、超弾性合金 12cはエレメント基部 12が容易に屈曲されるように 連結金具 1 Idおよび基部金具 12dに遊嵌されて ヽる。 [0016] Base fitting 12d to coil spring 12b, connecting fitting l ld, under whip element 11 A base cover 12a made of a flexible synthetic resin is formed so as to cover the portion. Further, a screw portion 12e is formed to extend from a lower portion of the base fitting 12d. The screw portion 12e is a screw portion that is screwed to an element mounting bracket provided on the upper part of the antenna cover 3. A characteristic configuration of the antenna element 10 of the present invention is that a fitting hole is formed at a lower portion of the connection fitting lid, one end of the superelastic alloy 12c is fitted into the fitting hole, and the base fitting 12d is formed. A fitting hole is formed in the upper part, and the other end of the superelastic alloy 12c is fitted into the fitting hole. In this case, the superelastic alloy 12c is disposed in the coil spring 12b, and electrically connects the connection fitting lid and the base fitting 12d. The superelastic alloy 12c is a Ni—Ti alloy and has the property of returning to its original shape without remaining strain even when subjected to a large strain exceeding 8%. As described above, since the superelastic alloy 12c has an excellent elastic recovery force, even if the element base 12 is severely bent, the original shape can be restored without remaining distortion. The superelastic alloy 12c is loosely fitted to the connection fitting 1Id and the base fitting 12d so that the element base 12 is easily bent.
[0017] このように本発明に力かるアンテナエレメント 10が構成されていることにより、ホイツ プエレメント 11は連結金具 l ld、超弾性合金 12cを介して基部金具 12dに電気的に 接続される。すなわち、ホイップエレメント 11、連結金具 l ld、超弾性合金 12c、基部 金具 12dがアンテナとして動作するようになる。なお、ネジ部 12eをアンテナカバー 3 に螺着することにより、アンテナエレメント 10で受信された受信信号は、アンテナカバ 一 3内で増幅等されてアンテナベース 5の下面から導出されるケーブルを介して車体 内に導入されるようになる。  [0017] With the configuration of the antenna element 10 according to the present invention, the whip element 11 is electrically connected to the base metal part 12d via the connection metal part lld and the superelastic alloy 12c. In other words, the whip element 11, the connecting fitting lld, the superelastic alloy 12c, and the base fitting 12d operate as an antenna. Note that by screwing the screw portion 12e to the antenna cover 3, the received signal received by the antenna element 10 is amplified and the like in the antenna cover 3 and passed through a cable led out from the lower surface of the antenna base 5. It will be introduced into the body.
[0018] 上記したように、超弾性合金 12cをコイルスプリング 12b内に配置して、連結金具 1 Idと基部金具 12dとに遊嵌することにより、例えば、コイルスプリング 12bが図 4 (a)に 示すように正常に屈曲されても、図 4 (b)に示すように過度に屈曲されても、超弾性合 金 12cにより連結金具 l idと基部金具 12dとが電気的に接続されていることから、コィ ルスプリング 12bの電気的な長さによる影響をアンテナエレメント 10は受けないように なる。すなわち、エレメント基部 12が屈曲されてもコイルスプリング 12bの影響を受け ることなくアンテナエレメント 10の電気的特性は変化しないようになる。また、超弾性 合金 12cの作用によりエレメント基部 12が過酷に屈曲されても歪が残ることなく元の 形状に復元されるようになる。 As described above, by disposing the superelastic alloy 12c in the coil spring 12b and loosely fitting the connecting fitting 1Id and the base fitting 12d, for example, the coil spring 12b is moved to the position shown in FIG. Even if it is bent normally as shown in the figure or excessively bent as shown in Fig. 4 (b), the connecting fitting lid and the base fitting 12d must be electrically connected by the superelastic alloy 12c. Therefore, the antenna element 10 is not affected by the electrical length of the coil spring 12b. That is, even if the element base 12 is bent, the electrical characteristics of the antenna element 10 do not change without being affected by the coil spring 12b. In addition, even if the element base 12 is severely bent by the action of the superelastic alloy 12c, the original The shape is restored.
なお、コイルスプリング 12b内に配置するのは超弾性合金 12cに限るものではなく、 超弾性合金 12cに替えてゴムメタル (登録商標)等の超弾性的性質を示す導電性の 棒状体としても良い。  It should be noted that the arrangement in the coil spring 12b is not limited to the superelastic alloy 12c, but may be a conductive rod-shaped body exhibiting superelastic properties such as rubber metal (registered trademark) instead of the superelastic alloy 12c.
産業上の利用可能性 Industrial applicability
以上の説明ではラジオ用のアンテナエレメントとした力 本発明のアンテナエレメン トはラジオ用に限らず、支持部材のヘリカル状溝部の溝ピッチを一部変えてヘリカル コイルの一部をトラップコイルとして動作させることにより、 AMZFMZ移動電話等の 複合アンテナとすることができる。  In the above description, the antenna element of the present invention is not limited to the radio. The antenna element of the present invention is not limited to the radio, and a part of the helical coil is operated as a trap coil by changing the groove pitch of the helical groove of the support member. Thus, a composite antenna for an AMZFMZ mobile phone or the like can be obtained.

Claims

請求の範囲 The scope of the claims
[1] ホイップエレメントと、  [1] whip element,
該ホイップエレメントを備えるアンテナエレメントを被取付部に固着するための基部 金具と、  A base metal fitting for fixing an antenna element having the whip element to a mounting portion,
前記ホイップエレメントの基端を支持する連結金具と、前記基部金具との間に設け られたコイルスプリングと、  A connection fitting for supporting a base end of the whip element, and a coil spring provided between the base fitting,
一端が前記連結金具に、他端が前記基部金具に嵌挿されていると共に、前記コィ ルスプリング内に配設されて 1ヽる超弾性的性質を示す導電性の細長!/ヽ棒状体と、 を備えて 、ることを特徴とするアンテナエレメント。  One end is fitted into the connection fitting and the other end is fitted into the base fitting, and is disposed in the coil spring and has a super-elastic conductive slender! / ヽ rod-shaped body. An antenna element, comprising:
[2] 前記棒状体が超弾性合金製とされて!/ヽることを特徴とする請求項 1記載のアンテナ エレメント。 2. The antenna element according to claim 1, wherein the rod-shaped body is made of a superelastic alloy!
PCT/JP2005/003965 2004-04-12 2005-03-08 Antenna element WO2005101568A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009012957A2 (en) * 2007-07-21 2009-01-29 Hirschmann Car Communication Gmbh Rod antenna with different antenna conductor structures in places
GB2488227A (en) * 2011-02-15 2012-08-22 Harada Ind Co Ltd A compact flexible monopole antenna
EP2705569A1 (en) * 2011-05-06 2014-03-12 R.A. Miller Industries, Inc. Spring boot for a mobile antenna

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109193165B (en) * 2018-07-24 2020-10-23 北京晶品特装科技有限责任公司 Flexible micro antenna structure

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08237020A (en) * 1995-02-22 1996-09-13 Tokin Corp Antenna and its manufacture
JP2001060820A (en) * 1999-08-20 2001-03-06 Nippon Antenna Co Ltd Antenna element

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08237020A (en) * 1995-02-22 1996-09-13 Tokin Corp Antenna and its manufacture
JP2001060820A (en) * 1999-08-20 2001-03-06 Nippon Antenna Co Ltd Antenna element

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009012957A2 (en) * 2007-07-21 2009-01-29 Hirschmann Car Communication Gmbh Rod antenna with different antenna conductor structures in places
WO2009012957A3 (en) * 2007-07-21 2009-08-13 Hirschmann Car Comm Gmbh Rod antenna with different antenna conductor structures in places
GB2488227A (en) * 2011-02-15 2012-08-22 Harada Ind Co Ltd A compact flexible monopole antenna
GB2488227B (en) * 2011-02-15 2014-10-22 Harada Ind Co Ltd Vehicle pole antenna
EP2705569A1 (en) * 2011-05-06 2014-03-12 R.A. Miller Industries, Inc. Spring boot for a mobile antenna
EP2705569A4 (en) * 2011-05-06 2014-10-22 Miller R A Ind Inc Spring boot for a mobile antenna
US9490524B2 (en) 2011-05-06 2016-11-08 R.A. Miller Industries, Inc. Spring boot for a mobile antenna

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