JP4100804B2 - Antenna and method for forming the same - Google Patents

Antenna and method for forming the same Download PDF

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Publication number
JP4100804B2
JP4100804B2 JP5069099A JP5069099A JP4100804B2 JP 4100804 B2 JP4100804 B2 JP 4100804B2 JP 5069099 A JP5069099 A JP 5069099A JP 5069099 A JP5069099 A JP 5069099A JP 4100804 B2 JP4100804 B2 JP 4100804B2
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Japan
Prior art keywords
antenna element
rod
element member
shaped antenna
conductive connection
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JP2000252733A (en
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隆夫 川原
正範 長谷川
竜彦 伊藤
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Yokowo Co Ltd
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Yokowo Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14065—Positioning or centering articles in the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14065—Positioning or centering articles in the mould
    • B29C2045/14131—Positioning or centering articles in the mould using positioning or centering means forming part of the insert
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3456—Antennas, e.g. radomes

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Aerials (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、保護カバーとして外周面に樹脂質成形被覆が形成されたアンテナ及びその形成方法に関し、特に、車載機器用アンテナ等に用いられるアンテナ及びその形成方法に関する。
【０００２】
【従来の技術】
車載通信機器用等のアンテナは、アンテナ素子が組み込まれたアンテナ素子部材と、その基端部に取り付けられてアンテナ素子と通信機器との接続を図る導電性接続金具とを基本構成とするが、このアンテナ素子部材及び導電性接続金具の外周面には、金属面の劣化防止或いはアンテナ自体の屈曲強度を確保するために保護カバーが形成される。
【０００３】
従来、この保護カバーの形成にあたっては、アンテナ素子部材の外周に熱収縮チューブを被せ、次に導電性接続金具の外周には合成ゴムチューブを被せ、更には先端頂部にキャップを取り付けるといった煩雑な手作業を要していた。このような手作業による保護カバーの形成では、作業に時間を費やしてコスト高となり、また外観上も難点があることから、アンテナ素子部材と導電性接続金具とを成形型枠内に配置したインサート成形によって保護カバーを形成する技術が開発されるに至った。
【０００４】
【発明が解決しようとする課題】
上述したインサート成形による保護カバー形成の概要を図４にて説明する。樹脂成形金型１の型枠１ａ，１ｂ内に、アンテナのアンテナ素子部材１１と導電性接続金具１２とを配置する。この配置にあたっては、導電性接続金具１２のネジ部１２ａを固定駒２に取り付けて型枠の所定位置にはめ込み、更にアンテナ素子部材の先端頂部を支持部１ｃによって支持させる。これによって、型枠１ａ，１ｂ内の空間１ｅのセンターとアンテナ素子部材１１，導電性接続金具１２の中心軸とを一致させることができる。そして、ライナー１ｄから合成樹脂を圧入すると図示していない排気口に向けて合成樹脂が注入され、空間１ｅ内に合成樹脂が充填される。
【０００５】
ここで問題となるのは、アンテナ素子部材１１及び導電性接続金具１２に対して軸対象の均一厚さで樹脂質成形被覆の保護カバーを形成するために、アンテナ素子部材１１の先端頂部を支持部１ｃで支持させて、空間１ｅのセンターとアンテナ素子部材１１及び導電性接続金具１２の中心軸との一致を図っていることである。図５に、上述したインサート成形によって形成されたアンテナ１０を示すが、上述したインサート成形によると、アンテナ素子部材の先端頂部を支持部１ｃで支持しているため、この先端頂部には樹脂質成形被覆１３が形成されない。したがって、インサート成形による形成後に、アンテナ１０の先端頂部にキャップ１４を取り付ける必要があり、このキャップ１４の取り付け作業が生産性を向上させる上での障害となっていた。
【０００６】
本発明は、このような事情に対処するために提案されたものであって、アンテナの外周面に樹脂質成形被覆を一体形成するにあたって、その先端頂部から基端部に至る外周面に樹脂質成形被覆を形成することによって、生産性の向上を図ることを目的とする。
【０００７】
【課題を解決するための手段】
上記目的を達成するための本発明は、第１にアンテナの形成方法における一つの構成として、第１の樹脂成形型枠内にロッド状アンテナ素子を配置し、前記第１の樹脂成形型枠の基端部に導電性接続金具を配置して、表面に前記ロッド状アンテナ素子が露出し、前記基端部に前記導電性接続金具が組み込まれるとともに、側面に第２の工程で成形される樹脂質成形被覆の被覆厚に相当する高さを有する突起が設けられたロッド状アンテナ素子部材を一体成形する第１の工程と、前記導電性接続金具を固定駒に取り付け、第２の樹脂成形型枠の所定位置に前記固定駒をはめ込むことで前記ロッド状アンテナ素子部材の先端頂部の先端面と前記第２の樹脂成形型枠の間に空間を設けた状態で前記ロッド状アンテナ素子部材の長手方向の位置決めを行い、前記ロッド状アンテナ素子部材の側面に形成した前記突起の先端を前記第２の樹脂成形型枠内の内面に当接させた状態で前記ロッド状アンテナ素子部材の先端頂部の先端面から前記導電性接続金具に至る外周面に樹脂質成形被覆を一体成形する第２の工程とを有することを特徴とする。また、アンテナの形成方法における他の構成として、第１の樹脂成形型枠内にロッド状アンテナ素子を配置し、前記第１の樹脂成形型枠の基端部に導電性接続金具を配置して、表面に前記ロッド状アンテナ素子が露出し、前記基端部に前記導電性接続金具が組み込まれたロッド状アンテナ素子部材を一体成形する第１の工程と、前記導電性接続金具を固定駒に取り付け、成形すべき樹脂質成形被覆の被覆厚に相当する高さの突起を内面に有する第２の樹脂成形型枠の所定位置に前記固定駒をはめ込むことで前記ロッド状アンテナ素子部材の先端頂部の先端面と前記第２の樹脂成形型枠の間に空間を設けた状態で前記ロッド状アンテナ素子部材の長手方向の位置決めを行い、前記第２の樹脂成形型枠の内面に形成した前記突起の先端を前記ロッド状アンテナ素子部材の側面に当接させた状態で前記ロッド状アンテナ素子部材の先端頂部の先端面から前記導電性接続金具に至る外周面に樹脂質成形被覆を一体成形する第２の工程と、を有することを特徴とする。そして更に、これらのアンテナの形成方法において、前記突起の配設間隔は、前記ロッド状アンテナ素子部材を前記第２の樹脂成形型枠内でセンタリングするのに必要な支持数と前記第２の樹脂成形型枠空間内の樹脂の流動とを考慮して設定されていることを特徴とする。
【０００８】
第２にアンテナの構成として、ロッド状アンテナ素子部材の基端部に導電性接続金具を連結し、前記ロッド状アンテナ素子部材の先端頂部の先端面から前記導電性接続金具に至る外周面に樹脂質成形被覆を一体成形したアンテナであって、前記ロッド状アンテナ素子部材は、前記先端頂部を除くその側面に前記樹脂質成形被覆の被覆厚に相当する高さの突起を有することを特徴とする。
【０００９】
上記の特徴からなる本発明によると、第２の樹脂成形型枠内に配置されるロッド状アンテナ素子部材は、ロッド状アンテナ素子部材側面に形成された上記の突起、または前記第２の樹脂成形型枠の内面に形成された上記の突起によって前記第２の樹脂成形型枠空間内でのセンタリングが成され、第２の樹脂成形型枠の所定位置に前記固定駒がはめ込まれることで前記ロッド状アンテナ素子部材の先端頂部の先端面と前記第２の樹脂成形型枠の間に空間を設けた状態で長手方向の位置決めが成される。これによって、樹脂成形型枠内でロッド状アンテナ素子部材の先端頂部を支持する必要がなくなり、ロッド状アンテナ素子部材の先端頂部の先端面を含んだ外周面の全面に樹脂質成形被覆を一体成形することが可能になる。
【００１０】
また、基端部に導電性接続金具が連結されたロッド状アンテナ素子部材は第１の樹脂成形型枠による一体樹脂成形により形成することができるので、ロッド状アンテナ素子部材の先端頂部を除く側面に形成される上記の突起は、その一体樹脂成形時に同時に形成することが可能である。したがって、上記の突起を形成するために新たな作業工程を付加する必要はない。
【００１１】
【発明の実施の形態】
以下、本発明の実施例を図面を参照して説明する。（なお、従来と同一の部分には同一の番号を付して一部説明を省略する。）図１は本発明の一実施例に係るアンテナの構成を示す説明図であり、同図（ａ）は側面図、同図（ｂ）は同図（ａ）のＡ−Ａ断面図を示している。図１において、アンテナ２０は、上述した従来例と同様に、アンテナ素子部材２１とその基端部に連結された導電性接続金具２２とを基本構成としており、アンテナ素子部材２１の先端頂部から導電性接続金具２２に至る外周面に、破線で示した樹脂質成形被覆２３が一体成形される。２２ａは導電性接続金具２２のネジ部を示している。
【００１２】
アンテナ素子部材２１は、樹脂成形部材の表面にヘリカルアンテナ素子２１ａを巻回して組み込んだもので、ヘリカルアンテナ素子２１ａのコイルピッチとアンテナ素子部材の全長とによって所望のアンテナ長が得られるように調整される。そして、そのアンテナ素子部材２１の側面には突起２１ｂが設けられる。この突起２１ｂは、図示の如く、各部位で樹脂質成形被覆２３の被覆厚に相当する高さを有し、その配設間隔は、アンテナ素子部材２１を型枠内でセンタリングするのに必要な支持数と型枠空間内の樹脂の流動とを考慮して所望の間隔が設定される。
【００１３】
アンテナ素子部材２１の形成について説明すると、ロッド状の樹脂成形部材の表面にヘリカルアンテナ素子を巻回して、その後にロッド状樹脂成形部材の基端部に導電性接続金具２２を取り付ける方法も可能であるが、生産性の向上を図るためには、ヘリカルアンテナ素子２１ａと導電性接続金具２２とを一体成形するインサート成形が好ましい。これは、樹脂成形型枠内の内面にヘリカルアンテナ素子２１ａを配置し、この型枠の基端部に導電性接続金具２２を配置して、ロッド状の表面にヘリカルアンテナ素子２１ａが露出し、基端部に導電性接続金具２２が組み込まれた樹脂成形品を一体成形する方法である。何れの方法においても、上記の突起２１ｂはロッド状樹脂成形部材の樹脂成形と同時に形成することが可能であって、この突起２１ｂ自体は簡易に形成することができる。
【００１４】
次に図２によって、外周面に樹脂質成形被覆２３を形成するアンテナの形成方法について説明する。まず、樹脂成形金型１の型枠１ａ，１ｂ内に、アンテナのアンテナ素子部材２１と導電性接続金具２２とを配置する。この配置にあたっては、導電性接続金具２２のネジ部２２ａを固定駒２に取り付け型枠の所定位置にはめ込み、更にアンテナ素子部材２１の側面に形成した突起２１ｂの先端を空間１ｅの内面に当接させる。これによって、型枠１ａ，１ｂ内の空間１ｅのセンターとアンテナ素子部材２１及び導電性接続金具２２の中心軸２１ｃとの一致を図ることができる。これによると、図４の例で示したようなアンテナ素子部材２１の先端頂部を支持する支持部１ｃは不要となり、アンテナ素子部材２１の先端頂部にも空間１ｅを連続的に形成することができる。したがって、ここで形成される樹脂質成形被覆はアンテナ素子部材２１の先端頂部を含んだ外周面全域に形成される。
【００１５】
図３は、上述したアンテナ２０の実装状態を示す説明図である。アンテナ２０は、導電性接続金具２２のネジ部２２ａを通信機器３０の接続部３０ａにネジ結合して実装される。ここで、アンテナ２０は、アンテナ素子部材２１の先端頂部からその基端部に連結された導電性接続金具２２に至る外周面全域に、例えばエストラマ樹脂等の樹脂質成形被覆２３が形成されている。上述のように、このアンテナ２０はインサート成形を繰り返すことによって形成可能であって、先端にキャップを取り付ける等の手作業を省いて生産性の向上を図ることができるものである。
【００１６】
また、上述した説明ではアンテナ素子部材の側面に突起を形成したが、逆に樹脂成形金型の型枠空間内面に直径１ｍｍ以下の突起を形成して、アンテナ素子部材を型枠空間のセンターに支持することによって、アンテナ素子部材先端頂部の支持をなくすことも考えられる。
【００１７】
【発明の効果】
本発明は上記のように構成されるもので、第２の樹脂成形型枠の所定位置に前記固定駒がはめ込まれることで前記ロッド状アンテナ素子部材の先端頂部の先端面と前記第２の樹脂成形型枠の間に空間を設けた状態で長手方向の位置決めが成され、ロッド状アンテナ素子部材側面に形成された上記の突起、または前記第２の樹脂成形型枠の内面に形成された上記の突起によって前記第２の樹脂成形型枠空間内でのセンタリングを行うようにしたので、アンテナの外周面に樹脂質成形被覆を一体形成するにあたって、その先端頂部の先端面から基端部に至る外周面全域に樹脂質成形被覆を形成することができる。これによって、形成時の手作業を省いて生産性を向上させ、製品のコストダウンを図ることができ、さらにはエレメントの折曲耐久性が向上するようになる。
【図面の簡単な説明】
【図１】本発明の一実施例に係るアンテナの構成を示す説明図。
【図２】本発明の一実施例に係るアンテナの形成方法を示す説明図。
【図３】本発明の一実施例に係るアンテナの実装状態を示す説明図。
【図４】従来のアンテナの形成方法を示す説明図。
【図５】従来のアンテナの構成を示す説明図。
【符号の説明】
１ 樹脂成形金型
２ 固定駒
１０，２０ アンテナ
１１，２１ アンテナ素子部材
１２，２２ 導電性接続金具
１３，２３ 樹脂質成形被覆[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an antenna having a resin-molded coating formed on its outer peripheral surface as a protective cover and a method for forming the same, and more particularly to an antenna used for an antenna for vehicle equipment and the method for forming the same.
[0002]
[Prior art]
An antenna for an in-vehicle communication device or the like has a basic configuration of an antenna element member in which an antenna element is incorporated and a conductive connection fitting that is attached to a base end portion thereof to connect the antenna element and the communication device. A protective cover is formed on the outer peripheral surfaces of the antenna element member and the conductive connection fitting in order to prevent deterioration of the metal surface or to ensure the bending strength of the antenna itself.
[0003]
Conventionally, when forming this protective cover, the outer periphery of the antenna element member is covered with a heat shrinkable tube, then the conductive connector fitting is covered with a synthetic rubber tube, and a cap is attached to the top of the tip. It needed work. In the formation of such a protective cover by hand, it takes time to work, and the cost is high, and the appearance is also difficult. Therefore, an insert in which an antenna element member and a conductive connection fitting are arranged in a molding mold A technology for forming a protective cover by molding has been developed.
[0004]
[Problems to be solved by the invention]
The outline of the protective cover formation by the insert molding described above will be described with reference to FIG. An antenna element member 11 and a conductive connection fitting 12 of an antenna are disposed in the molds 1 a and 1 b of the resin molding die 1. In this arrangement, the screw portion 12a of the conductive connection fitting 12 is attached to the fixed piece 2 and fitted into a predetermined position of the mold, and the top end of the antenna element member is supported by the support portion 1c. Thereby, the center of the space 1e in the molds 1a and 1b can be aligned with the central axes of the antenna element member 11 and the conductive connection fitting 12. When the synthetic resin is press-fitted from the liner 1d, the synthetic resin is injected toward an exhaust port (not shown), and the space 1e is filled with the synthetic resin.
[0005]
The problem here is that the top end of the antenna element member 11 is supported in order to form a protective cover with a resin-molded coating on the antenna element member 11 and the conductive connecting member 12 with a uniform thickness of the axial object. That is, the center of the space 1e and the center axis of the antenna element member 11 and the conductive connection fitting 12 are matched with each other by being supported by the portion 1c. FIG. 5 shows the antenna 10 formed by the above-described insert molding. According to the above-described insert molding, the top end of the antenna element member is supported by the support portion 1c. The coating 13 is not formed. Therefore, after the formation by insert molding, it is necessary to attach the cap 14 to the top end of the antenna 10, and the attaching operation of the cap 14 has been an obstacle to improving the productivity.
[0006]
The present invention has been proposed in order to cope with such a situation, and in the case of integrally forming a resinous molding coating on the outer peripheral surface of the antenna, the resinous material is formed on the outer peripheral surface from the top to the base end. An object is to improve productivity by forming a molded coating.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, as one configuration of the antenna forming method, a rod-shaped antenna element is disposed in a first resin molding mold, and the first resin molding mold Resin formed by disposing a conductive connection fitting at the base end, exposing the rod-shaped antenna element on the surface, incorporating the conductive connection fitting at the base end, and forming a side surface in the second step A first step of integrally molding a rod-shaped antenna element member provided with a projection having a height corresponding to the coating thickness of the quality molding coating; and a second resin molding die, wherein the conductive connection fitting is attached to a fixed piece The length of the rod-shaped antenna element member is set in a state where a space is provided between the distal end surface of the distal end top portion of the rod-shaped antenna element member and the second resin molding frame by fitting the fixing piece into a predetermined position of the frame. Direction positioning There, from said distal end surface of the tip apex of the rod-like antenna element member side to form the said protrusion of the tip of the second resin molding frame within the inner surface to contact said rod-shaped antenna element member in a state allowed in And a second step of integrally molding a resinous molding coating on the outer peripheral surface leading to the conductive connection fitting. Further, as another configuration in the method of forming the antenna, a rod-shaped antenna element is disposed in the first resin molding mold, and a conductive connection fitting is disposed at the base end portion of the first resin molding mold. A first step of integrally forming a rod-shaped antenna element member in which the rod-shaped antenna element is exposed on the surface and the conductive connection fitting is incorporated in the base end portion; and the conductive connection fitting is used as a fixed piece. The top end of the rod-shaped antenna element member is fitted into a predetermined position of a second resin molding mold having a projection corresponding to the coating thickness of the resin molding coating to be attached and molded on the inner surface. The rod-shaped antenna element member is positioned in the longitudinal direction in a state where a space is provided between the front end surface of the second resin molding mold and the protrusion formed on the inner surface of the second resin molding mold The tip of the lock A second step of integrally molding a resinous molded coating on the outer peripheral surface extending to the conductive fitting from the distal end surface of the tip apex of the rod-like antenna element member being in contact with the side surface of the Jo antenna element member, It is characterized by having. Further, in these antenna formation methods, the spacing between the protrusions is such that the number of supports necessary for centering the rod-shaped antenna element member in the second resin mold and the second resin. It is set in consideration of the flow of resin in the molding form space.
[0008]
Secondly, as a configuration of the antenna, a conductive connection fitting is connected to the base end portion of the rod-shaped antenna element member, and a resin is provided on the outer peripheral surface from the tip surface of the tip top portion of the rod-shaped antenna element member to the conductive connection fitting. The rod-shaped antenna element member has a protrusion having a height corresponding to the coating thickness of the resinous molding coating on the side surface excluding the top of the tip. .
[0009]
According to the present invention having the above characteristics, the rod-shaped antenna element member disposed in the second resin molding mold is the above-mentioned protrusion formed on the side surface of the rod-shaped antenna element member, or the second resin molding. The above-mentioned projection formed on the inner surface of the mold forms a centering in the second resin molding mold space, and the fixing piece is fitted into a predetermined position of the second resin molding mold, thereby the rod Positioning in the longitudinal direction is performed in a state where a space is provided between the distal end surface of the distal end top portion of the rectangular antenna element member and the second resin mold . This eliminates the need to support the top end of the rod-shaped antenna element member in the resin mold, and integrally forms a resin-molded coating on the entire outer peripheral surface including the tip surface of the top end of the rod-shaped antenna element member. It becomes possible to do.
[0010]
In addition, the rod-shaped antenna element member having the conductive end fitting connected to the base end portion can be formed by integral resin molding using the first resin molding mold, so that the side surface excluding the top end of the rod-shaped antenna element member The above-mentioned protrusions formed in the above can be formed simultaneously with the integral resin molding. Therefore, it is not necessary to add a new work process to form the above-mentioned protrusion.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. (In addition, the same number is attached | subjected to the part same as the past, and description is abbreviate | omitted.) FIG. 1 is explanatory drawing which shows the structure of the antenna which concerns on one Example of this invention, ) Is a side view, and FIG. 5B is a cross-sectional view taken along line AA of FIG. In FIG. 1, the antenna 20 has an antenna element member 21 and a conductive connecting member 22 connected to the base end portion thereof as a basic configuration, as in the conventional example described above, and conducts from the top end of the antenna element member 21. A resinous molding covering 23 indicated by a broken line is integrally formed on the outer peripheral surface reaching the flexible connection fitting 22. Reference numeral 22 a denotes a threaded portion of the conductive connection fitting 22.
[0012]
The antenna element member 21 is formed by winding a helical antenna element 21a around the surface of a resin molded member, and is adjusted so that a desired antenna length is obtained by the coil pitch of the helical antenna element 21a and the total length of the antenna element member. Is done. A projection 21 b is provided on the side surface of the antenna element member 21. As shown in the figure, the projection 21b has a height corresponding to the coating thickness of the resinous molding coating 23 at each portion, and the arrangement interval is necessary for centering the antenna element member 21 in the mold. A desired interval is set in consideration of the number of supports and the flow of resin in the mold space.
[0013]
The formation of the antenna element member 21 will be described. It is also possible to wind the helical antenna element around the surface of the rod-shaped resin molded member and then attach the conductive connection fitting 22 to the proximal end portion of the rod-shaped resin molded member. However, in order to improve productivity, insert molding in which the helical antenna element 21a and the conductive connection fitting 22 are integrally formed is preferable. This is because the helical antenna element 21a is arranged on the inner surface in the resin mold, the conductive connection fitting 22 is arranged at the base end of the mold, and the helical antenna element 21a is exposed on the rod-shaped surface. This is a method of integrally molding a resin molded product in which the conductive connection fitting 22 is incorporated at the base end. In any method, the projection 21b can be formed simultaneously with the resin molding of the rod-shaped resin molded member, and the projection 21b itself can be easily formed.
[0014]
Next, an antenna forming method for forming the resin molding 23 on the outer peripheral surface will be described with reference to FIG. First, the antenna element member 21 of the antenna and the conductive connection fitting 22 are arranged in the molds 1 a and 1 b of the resin molding die 1. In this arrangement, the screw portion 22a of the conductive fitting 22 is fitted to the fixed piece 2 at a predetermined position of the mounting frame, and the tip of the projection 21b formed on the side surface of the antenna element member 21 is brought into contact with the inner surface of the space 1e. Let Thereby, the center of the space 1e in the molds 1a and 1b and the center axis 21c of the antenna element member 21 and the conductive connection fitting 22 can be matched. According to this, the support portion 1c for supporting the top end of the antenna element member 21 as shown in the example of FIG. 4 is not necessary, and the space 1e can be continuously formed also at the top end of the antenna element member 21. . Therefore, the resinous molding coating formed here is formed over the entire outer peripheral surface including the top end of the antenna element member 21.
[0015]
FIG. 3 is an explanatory diagram showing a mounting state of the antenna 20 described above. The antenna 20 is mounted by screwing the screw portion 22 a of the conductive connection fitting 22 to the connection portion 30 a of the communication device 30. Here, in the antenna 20, a resinous molding covering 23 such as an elastomer resin is formed over the entire outer peripheral surface from the top end of the antenna element member 21 to the conductive connection fitting 22 connected to the base end thereof. . As described above, the antenna 20 can be formed by repeating insert molding, and productivity can be improved by omitting manual work such as attaching a cap to the tip.
[0016]
In the above description, the projection is formed on the side surface of the antenna element member. Conversely, a projection having a diameter of 1 mm or less is formed on the inner surface of the mold space of the resin mold, and the antenna element member is formed at the center of the mold space. By supporting the antenna element member, it may be possible to eliminate the support of the top end of the antenna element member.
[0017]
【The invention's effect】
The present invention is configured as described above. When the fixing piece is fitted into a predetermined position of the second resin mold, the tip surface of the tip of the tip of the rod-shaped antenna element member and the second resin are arranged. Positioning in the longitudinal direction is performed in a state where a space is provided between the molding molds, and the projections formed on the side surfaces of the rod-shaped antenna element member, or the inner surfaces of the second resin molding molds. Since the centering in the second resin molding mold space is performed by the protrusions, when the resinous molding coating is integrally formed on the outer peripheral surface of the antenna, the tip end surface of the tip reaches the base end portion. A resinous molding coating can be formed over the entire outer peripheral surface. Thus, it is possible to improve the productivity by omitting the manual work at the time of forming, and to reduce the cost of the product, and further, the bending durability of the element is improved.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a configuration of an antenna according to an embodiment of the present invention.
FIG. 2 is an explanatory view showing a method for forming an antenna according to an embodiment of the present invention.
FIG. 3 is an explanatory diagram showing a mounting state of an antenna according to an embodiment of the present invention.
FIG. 4 is an explanatory view showing a conventional method for forming an antenna.
FIG. 5 is an explanatory diagram showing a configuration of a conventional antenna.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Resin mold 2 Fixing piece 10,20 Antenna 11,21 Antenna element member 12,22 Conductive connection metal fitting 13,23 Resin-molding coating

Claims (4)

第１の樹脂成形型枠内にロッド状アンテナ素子を配置し、前記第１の樹脂成形型枠の基端部に導電性接続金具を配置して、表面に前記ロッド状アンテナ素子が露出し、前記基端部に前記導電性接続金具が組み込まれるとともに、側面に第２の工程で成形される樹脂質成形被覆の被覆厚に相当する高さを有する突起が設けられたロッド状アンテナ素子部材を一体成形する第１の工程と、
前記導電性接続金具を固定駒に取り付け、第２の樹脂成形型枠の所定位置に前記固定駒をはめ込むことで前記ロッド状アンテナ素子部材の先端頂部の先端面と前記第２の樹脂成形型枠の間に空間を設けた状態で前記ロッド状アンテナ素子部材の長手方向の位置決めを行い、前記ロッド状アンテナ素子部材の側面に形成した前記突起の先端を前記第２の樹脂成形型枠内の内面に当接させた状態で前記ロッド状アンテナ素子部材の先端頂部の先端面から前記導電性接続金具に至る外周面に樹脂質成形被覆を一体成形する第２の工程と、
を有することを特徴とするアンテナの形成方法。A rod-shaped antenna element is disposed in the first resin molding mold, a conductive connection fitting is disposed at the base end of the first resin molding mold, and the rod-shaped antenna element is exposed on the surface. A rod-shaped antenna element member in which the conductive connection fitting is incorporated in the base end portion and a protrusion having a height corresponding to the coating thickness of the resinous molding coating formed in the second step is provided on the side surface. A first step of integrally molding;
The conductive connection fitting is attached to a fixed piece, and the fixed piece is inserted into a predetermined position of the second resin molding mold, whereby the tip surface of the top end of the rod-shaped antenna element member and the second resin molding mold The rod-shaped antenna element member is positioned in the longitudinal direction with a space between them, and the tip of the protrusion formed on the side surface of the rod-shaped antenna element member is the inner surface of the second resin mold A second step of integrally molding a resinous molding coating on the outer peripheral surface extending from the distal end surface of the distal end top of the rod-shaped antenna element member to the conductive connection fitting in a state of being in contact with
A method of forming an antenna, comprising: 第１の樹脂成形型枠内にロッド状アンテナ素子を配置し、前記第１の樹脂成形型枠の基端部に導電性接続金具を配置して、表面に前記ロッド状アンテナ素子が露出し、前記基端部に前記導電性接続金具が組み込まれたロッド状アンテナ素子部材を一体成形する第１の工程と、
前記導電性接続金具を固定駒に取り付け、成形すべき樹脂質成形被覆の被覆厚に相当する高さの突起を内面に有する第２の樹脂成形型枠の所定位置に前記固定駒をはめ込むことで前記ロッド状アンテナ素子部材の先端頂部の先端面と前記第２の樹脂成形型枠の間に空間を設けた状態で前記ロッド状アンテナ素子部材の長手方向の位置決めを行い、前記第２の樹脂成形型枠の内面に形成した前記突起の先端を前記ロッド状アンテナ素子部材の側面に当接させた状態で前記ロッド状アンテナ素子部材の先端頂部の先端面から前記導電性接続金具に至る外周面に樹脂質成形被覆を一体成形する第２の工程と、
を有することを特徴とするアンテナの形成方法。A rod-shaped antenna element is disposed in the first resin molding mold, a conductive connection fitting is disposed at the base end of the first resin molding mold, and the rod-shaped antenna element is exposed on the surface. A first step of integrally forming a rod-shaped antenna element member in which the conductive connection fitting is incorporated in the base end;
The conductive connection fitting is attached to a fixed piece, and the fixed piece is inserted into a predetermined position of a second resin molding mold having a protrusion corresponding to the coating thickness of the resin molding covering to be molded on the inner surface. The rod-shaped antenna element member is positioned in the longitudinal direction in a state where a space is provided between the tip surface of the top end of the rod-shaped antenna element member and the second resin molding mold, and the second resin molding is performed. On the outer peripheral surface extending from the tip surface of the top of the tip of the rod-shaped antenna element member to the conductive connection fitting with the tip of the projection formed on the inner surface of the mold frame in contact with the side surface of the rod-shaped antenna element member A second step of integrally molding the resinous molding coating;
A method of forming an antenna, comprising: 前記突起の配設間隔は、前記ロッド状アンテナ素子部材を前記第２の樹脂成形型枠内でセンタリングするのに必要な支持数と前記第２の樹脂成形型枠空間内の樹脂の流動とを考慮して設定されていることを特徴とする請求項１又は２に記載のアンテナの形成方法。  The interval between the protrusions is determined by the number of supports necessary for centering the rod-shaped antenna element member in the second resin molding mold and the flow of resin in the second resin molding mold space. The method for forming an antenna according to claim 1, wherein the antenna is set in consideration. ロッド状アンテナ素子部材の基端部に導電性接続金具を連結し、前記ロッド状アンテナ素子部材の先端頂部の先端面から前記導電性接続金具に至る外周面に樹脂質成形被覆を一体成形したアンテナであって、
前記ロッド状アンテナ素子部材は、前記先端頂部を除くその側面に前記樹脂質成形被覆の被覆厚に相当する高さの突起を有することを特徴とするアンテナ。An antenna in which a conductive connection fitting is connected to the base end portion of the rod-shaped antenna element member, and a resin-molded coating is integrally formed on the outer peripheral surface extending from the tip surface of the tip top portion of the rod-shaped antenna element member to the conductive connection fitting. Because
The rod-shaped antenna element member has a protrusion having a height corresponding to a coating thickness of the resinous molding coating on a side surface thereof excluding the top of the tip.
JP5069099A 1999-02-26 1999-02-26 Antenna and method for forming the same Expired - Lifetime JP4100804B2 (en)

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JP3980470B2 (en) * 2002-11-25 2007-09-26 株式会社ヨコオ Method for manufacturing antenna
JP4902408B2 (en) * 2007-03-30 2012-03-21 クラリオン株式会社 Method for manufacturing helical antenna and primary molded product of helical antenna
JP4902407B2 (en) * 2007-03-30 2012-03-21 クラリオン株式会社 Method for manufacturing helical antenna and primary molded product of helical antenna
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