JP2004048419A

JP2004048419A - Feed horn for converter for satellite broadcast reception

Info

Publication number: JP2004048419A
Application number: JP2002203664A
Authority: JP
Inventors: Satoshi Matsuzaki; 松崎　聡; Shuji Saito; 斎藤　修司; Keiichiro Sato; 佐藤　桂一郎
Original assignee: Alps Electric Co Ltd
Current assignee: Alps Alpine Co Ltd
Priority date: 2002-07-12
Filing date: 2002-07-12
Publication date: 2004-02-12
Also published as: EP1381110A1; CN1472899A; CN1232055C

Abstract

<P>PROBLEM TO BE SOLVED: To provide a feed horn for a satellite broadcast reception where the workability of soldering is made satisfactory, the certain soldering is made available, and the deformation of a square cylindrical part is reduced. <P>SOLUTION: This feed horn for a converter for a satellite broadcasting reception is provided with a square cylindrical feed horn 6 whose metallic plate is folded, and third and fourth plate-shaped parts 9 and 10 of the feed horn 6 are provided with first and second band-shaped coupled parts 9b and 10b arranged to a direction where a square cylindrical part 11 is extended outside the square cylindrical part 11, and the first and second clad parts 9a and 10b are mutually coupled with a difference in level in a direction orthogonal to a direction where the square cylindrical part 11 is extended so that the wide coupled parts can be formed as the receiver of solder. Thus, it is possible to simplify the soldering work between the coupled parts, and to surely perform soldering. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は衛星放送を受信する衛星放送受信用コンバータのフィードホーンに関する。
【０００２】
【従来の技術】
従来の衛星放送受信用コンバータのフィードホーンの図面を説明すると、図７は従来の衛星放送受信用コンバータの概要を示す側面図、図８は従来の衛星放送受信用コンバータのフィードホーンを示す斜視図、図９は図８の９−９線における断面図、図１０は図８の１０−１０線における断面図である。
【０００３】
次に、従来の衛星放送受信用コンバータのフィードホーンの構成を図７〜図１０に基づいて説明すると、金属板を折り曲げして形成された枠体５１は、上下が開放したロ字状で構成されている。
金属板からなる蓋体５２は、枠体５１の一方の開放部を塞ぐように、枠体５１に掛け止めして取り付けられている。
【０００４】
プリント基板からなる回路基板５３は、一面側のほぼ全面にわたって形成された接地用パターン５４を有すると共に、ここでは図示しないが、他面側に配線パターンが設けられ、この配線パターンには、種々の電気部品を搭載して所望の受信用の電気回路が形成されたものとなっている。
【０００５】
そして、このような回路基板５３は、電気部品（電気回路）を枠体５１内に位置した状態で、ロ字状の枠体５１の他方の開放部を塞ぐように、枠体５１に取り付けられる。
回路基板５３が枠体５１に取り付けられた際、接地用パターン５４は枠体５１から露出して、枠体５１内をシールドし、その結果、電気回路は、枠体５１，蓋体５２，及び接地用パターン５４によって電気的にシールドされた状態となっている。
【０００６】
同軸型のコネクタ５５は、枠体５１から外方に突出した状態で枠体５１に取り付けられ、このコネクタ５５には電気回路が接続されて、電気回路で処理された信号をコネクタ５５から取り出すようになっている。
【０００７】
金属板が折り曲げ形成された四角筒状のフィードホーン５６は、回路基板５３から垂直状態で接地用パターン５４に半田付けされて取り付けられ、このフィードホーン５６から衛星電波を受けるようになっている。
【０００８】
そして、フィードホーン５６は、特に図８〜図１０に示すように、互いに繋がった状態で直角に折り曲げられた第１，第２の板状部５７，５８と、第１の板状部５７に繋がった状態で直角に折り曲げられた第３の板状部５９と、第２の板状部５８に繋がった状態で直角に折り曲げられた第４の板状部６０とを有する。
また、このフィードホーン５６は、第３，第４の板状部５９，６０の端部が互いに直角状態に合わされて、第１，第２，第３，第４の板状部５７，５８，５９，６０によって構成される四角筒部６１を有する。
【０００９】
また、第３，第４の板状部５９，６０の合わせ箇所において、第３の板状部５９の端部には、外方に突出する複数個の舌片５９ａが設けられると共に、第４の板状部６０の端部には、第３の板状部５９の端部に係止する凸部６０ａが設けられている。
【００１０】
そして、第１，第２の板状部５７，５８から直角に折り曲げられた第３，第４の板状部５９，６０は、凸部６０ａが舌片５９ａ間に位置する第３の板状部５９の端部に直角状態で係止し、この状態で、図１０に示すように、舌片５９ａ（二点差線で示す）を矢印Ａ方向に折り曲げて、第４の板状部６０の外面上に舌片５９ａを重ね合わせる。
【００１１】
しかる後、第４の板状部６０の凸部６０ａと第３の板状部５９の合わせ箇所の外周には、四角筒部６１の延びる方向に半田６２付けをして、両者の隙間を無くすることによって、フィードホーン５６が形成されるようになっている。
【００１２】
【発明が解決しようとする課題】
従来の衛星放送受信用コンバータのフィードホーンは、第４の板状部６０の凸部６０ａと第３の板状部５９の合わせ箇所の狭小な部分に半田６２を行うため、その半田付け作業がしづらく、作業性が悪くなるという問題がある。
また、その狭小な部分に半田付けを行うと、半田が第４の板状部６０側に垂れて、合わせ箇所での半田量が少なくなって、半田付け不良となるばかりか、見栄えが悪くなるという問題がある。
また、舌片５９ａを矢印Ａ方向に折り曲げた際、第４の板状部６０が矢印Ｂ方向に押されて、四角筒部６１が菱形になるという問題がある。
【００１３】
そこで、本発明は半田付けの作業性が良く、確実な半田付けが行えると共に、四角筒部の変形の少ない衛星放送受信用コンバータのフィードホーンを提供することを目的とする。
【００１４】
【課題を解決するための手段】
上記課題を解決するための第１の解決手段として、金属板が折り曲げ形成された四角筒状のフィードホーンを備え、このフィードホーンは、互いに繋がった状態で直角に折り曲げられた第１，第２の板状部と、前記第１の板状部に繋がった状態で直角に折り曲げられた第３の板状部と、前記第２の板状部に繋がった状態で直角に折り曲げられた第４の板状部とを有すると共に、前記フィードホーンは、前記第３，第４の板状部が互いに直角状態に合わされて、前記第１，第２，第３，第４の板状部で構成される四角筒部を備え、前記第３の板状部は、前記四角筒部外で前記四角筒部の延びる方向に設けられた帯状の第１の合わせ部を有すると共に、前記第４の板状部は、前記四角筒部外で前記四角筒部の延びる方向に設けられた帯状の第２の合わせ部を有し、前記第１，第２の合わせ部は、前記四角筒部の延びる方向に対して直交する方向に段差を持って互いに合わされた構成とした。
【００１５】
また、第２の解決手段として、前記第１，第２の合わせ部の一方は、前記平板部から同一平面上に延びて形成されると共に、前記第１，第２の合わせ部の他方は、前記平板部から直角に折り曲げられて形成された構成とした。
【００１６】
また、第３の解決手段として、前記第３，第４の平板部の一方には、前記平板部から同一平面上に延びる凸部が設けられると共に、前記第３，第４の平板部の他方には、前記凸部が嵌入する孔が設けられ、この孔に前記凸部を嵌入して、前記第３，第４の板状部が互いに直角状態に合わされた構成とした。
【００１７】
また、第４の解決手段として、前記凸部の先端部が前記四角筒部の延びる方向にカシメられた構成とした。
また、第５の解決手段として、前記平板部には、前記孔の外周から突出する舌片が設けられ、この舌片が折り曲げられて、前記凸部を有する前記平板部の外面上に重ね合わされた構成とした。
【００１８】
【発明の実施の形態】
本発明の衛星放送受信用コンバータのフィードホーンの図面を説明すると、図１は本発明の衛星放送受信用コンバータの概要を示す側面図、図２は本発明の衛星放送受信用コンバータのフィードホーンの第１実施例に係る斜視図、図３は図２の３−３線における断面図、図４は図２の４−４線における断面図である。
【００１９】
また、図５は本発明の衛星放送受信用コンバータのフィードホーンの第２実施例に係り、フィードホーンの合わせ部における断面図、図６は本発明の衛星放送受信用コンバータのフィードホーンの第３実施例に係り、フィードホーンの凸部における断面図である。
【００２０】
次に、本発明の衛星放送受信用コンバータのフィードホーンの第１実施例の構成を図１〜図４に基づいて説明すると、金属板を折り曲げして形成された枠体１は、上下が開放したロ字状で構成されている。
金属板からなる蓋体２は、枠体１の一方の開放部を塞ぐように、枠体１に掛け止めして取り付けられている。
【００２１】
プリント基板からなる回路基板３は、一面側のほぼ全面にわたって形成された接地用パターン４を有すると共に、ここでは図示しないが、他面側に配線パターンが設けられ、この配線パターンには、種々の電気部品を搭載して所望の受信用の電気回路が形成されたものとなっている。
【００２２】
そして、このような回路基板３は、電気部品（電気回路）を枠体１内に位置した状態で、ロ字状の枠体１の他方の開放部を塞ぐように、枠体１に取り付けられる。
回路基板３が枠体１に取り付けられた際、接地用パターン４は枠体１から露出して、枠体１内をシールドし、その結果、電気回路は、枠体１，蓋体２，及び接地用パターン４によって電気的にシールドされた状態となっている。
【００２３】
同軸型のコネクタ５は、枠体１から外方に突出した状態で枠体１に取り付けられ、このコネクタ５には電気回路が接続されて、電気回路で処理された信号をコネクタ５から取り出すようになっている。
【００２４】
金属板が折り曲げ形成された四角筒状のフィードホーン６は、回路基板３から垂直状態で接地用パターン４に半田付けされて取り付けられ、このフィードホーン６から衛星電波を受けるようになっている。
【００２５】
そして、フィードホーン６は、特に図２〜図４に示すように、互いに繋がった状態で直角に折り曲げられた第１，第２の板状部７，８と、第１の板状部７に繋がった状態で直角に折り曲げられた第３の板状部９と、第２の板状部８に繋がった状態で直角に折り曲げられた第４の板状部１０とを有する。
また、このフィードホーン６は、第３，第４の板状部９，１０の端部が互いに直角状態に合わされて、第１，第２，第３，第４の板状部７，８，９，１０によって構成される四角筒部１１を有する。
【００２６】
また、第３，第４の板状部９，１０の合わせ箇所において、第３の板状部９には、間隔を置いて端部近傍に設けられた一対の孔９ａと、この孔９ａ間に位置し、板状部９から同一平面上に延びる帯状の第１の合わせ部９ｂと、孔９ａの外周から突出する舌片９ｃとを有する。
そして、この第１の合わせ部９ｂは、四角筒部１１外で、四角筒部１１の延びる方向に延びて形成されている。
【００２７】
また、第３，第４の板状部９，１０の合わせ箇所において、第４の板状部１０には、平板部１０から同一平面上に突出し、前記孔９ａに嵌入される凸部１０ａと、平板部１０の一端から直角に折り曲げられた帯状の第２の合わせ部１０ｂとを有する。
そして、この第２の合わせ部１０ｂは、四角筒部１１外で、四角筒部１１の延びる方向に延びて形成されていると共に、この第２の合わせ部１０ｂの幅（四角筒部１１の延びる方向に対して直交する方向の長さ）は、第１の合わせ部９ｂの幅より広く形成されている。
【００２８】
そして、第１，第２の板状部７，８から直角に折り曲げられた第３，第４の板状部９，１０は、互いに直角状態に合わされて、凸部１０ａが孔９ａに嵌入されて、凸部１０ａの先端部が四角筒部１１の延びる方向にカシメられる。
また、第３，第４の板状部９，１０が合わされた際、第１，第２の合わせ部９ｂ、１０ｂは、四角筒部１１の延びる方向に対して直交する方向に段差を持って互いに合わされた状態となっている。
【００２９】
即ち、図３に示すように、第１の合わせ部９ｂよりも第２の合わせ部１０ｂが長く突出し、この第２の合わせ部１０ｂの外端部から四角筒部１１寄りに第１の合わせ部９ｂが位置した状態となっている。
【００３０】
また、この状態で、図４に示すように、舌片９ｃ（二点差線で示す）を矢印Ａ方向に折り曲げて、第４の板状部１０の外面上に舌片９ｃを重ね合わせる。
この時、第４の板状部１０は、矢印Ｂ方向に押されるが、凸部１０ａが孔９ａに嵌入しているため、第４の板状部１０の矢印Ｂ方向への変形は、極めて少なくなって、四角筒部１１の変形が無くなる。
【００３１】
しかる後、第１，第２の合わせ部９ｂ、１０ｂの段差部分には、四角筒部１１の延びる方向に半田１２付けをして、両者の隙間を無くすることによって、フィードホーン６が形成されるようになっている。
この時、幅広の第２の合わせ部１０ｂが半田１２の受けとなって、両者間の半田付けが容易で、確実な半田付けができると共に、半田垂れの無いものが得られる。
【００３２】
なお、上記実施例では、第１の合わせ部９ｂが板状部９から同一平面上に延び、また、第２の合わせ部１０ｂが平板部１０から直角に折り曲げられたもので説明したが、第１の合わせ部９ｂが板状部９から直角に折り曲げられ、また、第２の合わせ部１０ｂが平板部１０から同一平面上に延びたものでも良い。
【００３３】
また、上記実施例では、第４の板状部１０の凸部１０ａが第３の板状部９に孔９ａに嵌入するようにしたが、第４の板状部１０に孔を設け、この孔に、第３の板状部９に設けた凸部を嵌入するようにしても良い。
【００３４】
また、図５は本発明の衛星放送受信用コンバータのフィードホーンの第２実施例を示し、この第２実施例は、第３の板状部９に設けた帯状の第１の合わせ部９ｂの幅を、第４の板状部１０に設けた第２の合わせ部１０ｂの幅より広くして、両者の段差部分に半田１２付けを行ったものである。
その他の構成は、前記第１実施例と同様であり、同一部品に同一番号を付し、ここではその説明を省略する。
【００３５】
また、図６は本発明の衛星放送受信用コンバータのフィードホーンの第３実施例を示し、この第３実施例は、第３の板状部９に設けた舌片９ｃを折り曲げせずに、直線状に延ばしたままにしたものである。
その他の構成は、前記第１実施例と同様であり、同一部品に同一番号を付し、ここではその説明を省略する。
【００３６】
【発明の効果】
本発明の衛星放送受信用コンバータのフィードホーンは、金属板が折り曲げ形成された四角筒状のフィードホーンを備え、このフィードホーンは、互いに繋がった状態で直角に折り曲げられた第１，第２の板状部と、第１の板状部に繋がった状態で直角に折り曲げられた第３の板状部と、第２の板状部に繋がった状態で直角に折り曲げられた第４の板状部とを有すると共に、フィードホーンは、第３，第４の板状部が互いに直角状態に合わされて、第１，第２，第３，第４の板状部で構成される四角筒部を備え、第３の板状部は、四角筒部外で四角筒部の延びる方向に設けられた帯状の第１の合わせ部を有すると共に、第４の板状部は、四角筒部外で四角筒部の延びる方向に設けられた帯状の第２の合わせ部を有し、第１，第２の合わせ部は、四角筒部の延びる方向に対して直交する方向に段差を持って互いに合わされた構成とした。
このような構成によって、第１，第２の合わせ部の段差部分に半田付けをした時、幅広の合わせ部が半田の受けとなって、両者間の半田付け作業が容易で、確実な半田付けができると共に、半田垂れの無いものが得られる。
【００３７】
また、第１，第２の合わせ部の一方は、平板部から同一平面上に延びて形成されると共に、第１，第２の合わせ部の他方は、平板部から直角に折り曲げられて形成されたため、第１，第２の合わせ部の加工が容易であると共に、両者の重ね合わせが確実にできる。
【００３８】
また、第３，第４の平板部の一方には、平板部から同一平面上に延びる凸部が設けられると共に、第３，第４の平板部の他方には、凸部が嵌入する孔が設けられ、この孔に凸部を嵌入して、第３，第４の板状部が互いに直角状態に合わされたため、第３，第４の平板部の合わせ箇所での係止状態が確実で、四角筒部の変形の少ないものが得られる。
【００３９】
また、凸部の先端部が四角筒部の延びる方向にカシメられたため、四角筒部の変形か少なく、第３，第４の平板部の合わせ箇所での結合を強固にできる。
【００４０】
また、平板部には、孔の外周から突出する舌片が設けられ、この舌片が折り曲げられて、凸部を有する平板部の外面上に重ね合わされたため、四角筒部の変形か少なく、第３，第４の平板部の合わせ箇所での結合を強固にできる。
【図面の簡単な説明】
【図１】本発明の衛星放送受信用コンバータの概要を示す側面図。
【図２】本発明の衛星放送受信用コンバータのフィードホーンの第１実施例に係る斜視図。
【図３】図２の３−３線における断面図。
【図４】図２の４−４線における断面図。
【図５】本発明の衛星放送受信用コンバータのフィードホーンの第２実施例に係り、フィードホーンの合わせ部における断面図。
【図６】本発明の衛星放送受信用コンバータのフィードホーンの第３実施例に係り、フィードホーンの凸部における断面図。
【図７】従来の衛星放送受信用コンバータの概要を示す側面図。
【図８】従来の衛星放送受信用コンバータのフィードホーンを示す斜視図。
【図９】図８の９−９線における断面図。
【図１０】図８の１０−１０線における断面図。
【符号の説明】
１　枠体
２　蓋体
３　回路基板
４　接地用パターン
５　コネクタ
６　フィードホーン
７　第１の板状部
８　第２の板状部
９　第３の板状部
９ａ　孔
９ｂ　第１の合わせ部
９ｃ　舌片
１０　第４の板状部
１０ａ　凸部
１０ｂ　第２の合わせ部
１１　四角筒部
１２　半田[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a feed horn of a satellite broadcast receiving converter for receiving satellite broadcasts.
[0002]
[Prior art]
FIG. 7 is a side view showing an outline of a conventional converter for receiving satellite broadcasting, and FIG. 8 is a perspective view showing a feed horn of a conventional converter for receiving satellite broadcasting. 9 is a sectional view taken along line 9-9 in FIG. 8, and FIG. 10 is a sectional view taken along line 10-10 in FIG.
[0003]
Next, the configuration of the feed horn of the conventional converter for receiving satellite broadcasting will be described with reference to FIGS. 7 to 10. The frame 51 formed by bending a metal plate is formed in a square shape with an open top and bottom. Have been.
The lid 52 made of a metal plate is hooked and attached to the frame 51 so as to close one open portion of the frame 51.
[0004]
The circuit board 53 composed of a printed board has a grounding pattern 54 formed over substantially the entire surface on one surface side, and a wiring pattern (not shown) is provided on the other surface side. A desired receiving electric circuit is formed by mounting electric components.
[0005]
Then, such a circuit board 53 is attached to the frame 51 so as to close the other open portion of the square frame 51 in a state where the electric component (electric circuit) is located in the frame 51. .
When the circuit board 53 is attached to the frame 51, the grounding pattern 54 is exposed from the frame 51 and shields the inside of the frame 51. As a result, the electric circuit includes the frame 51, the lid 52, and It is in a state of being electrically shielded by the ground pattern 54.
[0006]
The coaxial connector 55 is attached to the frame 51 so as to protrude outward from the frame 51, and an electric circuit is connected to the connector 55 so that signals processed by the electric circuit are extracted from the connector 55. It has become.
[0007]
A rectangular cylindrical feed horn 56 formed by bending a metal plate is attached to the grounding pattern 54 by soldering in a vertical state from the circuit board 53 and receives satellite radio waves from the feed horn 56.
[0008]
As shown in FIGS. 8 to 10, the feed horn 56 includes first and second plate-like portions 57 and 58, which are bent at right angles while being connected to each other, and a first plate-like portion 57. It has a third plate-shaped portion 59 bent at a right angle in a connected state, and a fourth plate-shaped portion 60 bent at a right angle in a connected state to the second plate-shaped portion 58.
Further, the feed horn 56 is configured such that the ends of the third and fourth plate-shaped portions 59 and 60 are aligned at right angles to each other to form the first, second, third and fourth plate-shaped portions 57 and 58, It has a rectangular tube portion 61 constituted by 59 and 60.
[0009]
In addition, a plurality of tongue pieces 59a protruding outward are provided at the end of the third plate-like portion 59 at the place where the third and fourth plate-like portions 59 and 60 are joined, At the end of the plate-shaped portion 60, a convex portion 60a that is engaged with the end of the third plate-shaped portion 59 is provided.
[0010]
The third and fourth plate-like portions 59, 60 bent at right angles from the first and second plate-like portions 57, 58 form a third plate-like shape in which the convex portion 60a is located between the tongue pieces 59a. The tongue piece 59a (indicated by a two-dot line) is bent in the direction of arrow A as shown in FIG. 10 to lock the fourth plate-shaped part 60 in this state. The tongue piece 59a is overlaid on the outer surface.
[0011]
Thereafter, solder 62 is attached to the outer periphery of the joint between the convex portion 60a of the fourth plate-shaped portion 60 and the third plate-shaped portion 59 in the direction in which the rectangular tube portion 61 extends, so that there is no gap between them. By doing so, the feed horn 56 is formed.
[0012]
[Problems to be solved by the invention]
Since the feed horn of the conventional satellite broadcast receiving converter applies solder 62 to a narrow portion where the convex portion 60a of the fourth plate-shaped portion 60 and the third plate-shaped portion 59 are joined, the soldering work is not required. However, there is a problem that the workability is deteriorated.
Further, when soldering is performed on the narrow portion, the solder drips to the fourth plate-shaped portion 60 side, and the amount of solder at the joining portion is reduced, which causes not only poor soldering but also poor appearance. There is a problem.
Further, when the tongue piece 59a is bent in the direction of the arrow A, the fourth plate-shaped portion 60 is pushed in the direction of the arrow B, and there is a problem that the square cylindrical portion 61 becomes rhombic.
[0013]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a feed horn of a satellite broadcast receiving converter which has good workability of soldering, can perform reliable soldering, and has a small deformation of a rectangular tube portion.
[0014]
[Means for Solving the Problems]
As a first means for solving the above-mentioned problems, there is provided a rectangular cylindrical feed horn formed by bending a metal plate, and the feed horns are connected to each other and bent at right angles to the first and second feed horns. A third plate-like portion bent at a right angle while being connected to the first plate-like portion, and a fourth plate-like portion bent at a right angle while being connected to the second plate-like portion. And the feed horn is formed of the first, second, third, and fourth plate-shaped portions in which the third and fourth plate-shaped portions are aligned at right angles to each other. The third plate-shaped portion has a band-shaped first joining portion provided in the direction in which the square tube portion extends outside the square tube portion, and the fourth plate The second portion is a band-shaped second portion provided in a direction in which the square tube portion extends outside the square tube portion. Has Align portion, said first, second mating portion has a structure which is combined together with a step in a direction perpendicular to the direction of extension of the square tubular portion.
[0015]
As a second solution, one of the first and second mating portions is formed so as to extend on the same plane from the flat plate portion, and the other of the first and second mating portions is It was configured to be bent at a right angle from the flat plate portion.
[0016]
As a third solution, one of the third and fourth flat plate portions is provided with a convex portion extending on the same plane from the flat plate portion, and the other of the third and fourth flat plate portions is provided. Has a hole in which the convex portion is fitted, and the convex portion is fitted in the hole, and the third and fourth plate-shaped portions are fitted at right angles to each other.
[0017]
Further, as a fourth solution, a configuration is adopted in which the tip of the convex portion is caulked in the direction in which the rectangular tube portion extends.
As a fifth solution, a tongue protruding from the outer periphery of the hole is provided on the flat plate portion, and the tongue portion is bent and overlapped on the outer surface of the flat plate portion having the convex portion. Configuration.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Referring to the drawings of the feed horn of the converter for receiving satellite broadcasting of the present invention, FIG. 1 is a side view showing the outline of the converter for receiving satellite broadcasting of the present invention, and FIG. FIG. 3 is a perspective view according to the first embodiment, FIG. 3 is a sectional view taken along line 3-3 in FIG. 2, and FIG. 4 is a sectional view taken along line 4-4 in FIG.
[0019]
FIG. 5 is a cross-sectional view of a feed horn of a satellite broadcast receiving converter according to a second embodiment of the present invention, and FIG. 6 is a third view of a feed horn of the satellite broadcast receiving converter of the present invention. It is sectional drawing in the convex part of the feed horn concerning an Example.
[0020]
Next, the structure of a feed horn for a satellite broadcast receiving converter according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 4. The frame 1 formed by bending a metal plate is open up and down. It has a rectangular shape.
The lid 2 made of a metal plate is hung and attached to the frame 1 so as to close one open portion of the frame 1.
[0021]
The circuit board 3 composed of a printed board has a grounding pattern 4 formed over substantially the entire surface on one surface side, and a wiring pattern (not shown) is provided on the other surface side. A desired receiving electric circuit is formed by mounting electric components.
[0022]
Then, such a circuit board 3 is attached to the frame 1 so as to close the other open portion of the square-shaped frame 1 in a state where the electric components (electric circuits) are located in the frame 1. .
When the circuit board 3 is mounted on the frame 1, the grounding pattern 4 is exposed from the frame 1 and shields the inside of the frame 1, so that the electric circuit includes the frame 1, the lid 2, and the It is in a state of being electrically shielded by the ground pattern 4.
[0023]
The coaxial connector 5 is attached to the frame 1 so as to protrude outward from the frame 1, and an electric circuit is connected to the connector 5 so that signals processed by the electric circuit are extracted from the connector 5. It has become.
[0024]
A rectangular cylindrical feed horn 6 formed by bending a metal plate is attached to the ground pattern 4 by soldering in a vertical state from the circuit board 3 and receives satellite radio waves from the feed horn 6.
[0025]
The feed horn 6 includes first and second plate-shaped portions 7 and 8 that are bent at right angles while being connected to each other, and the first plate-shaped portion 7 as shown in FIGS. It has a third plate-shaped portion 9 bent at a right angle in a connected state, and a fourth plate-shaped portion 10 bent at a right angle in a connected state to the second plate-shaped portion 8.
Also, the feed horn 6 is configured such that the ends of the third and fourth plate-shaped portions 9 and 10 are aligned at right angles to each other to form the first, second, third and fourth plate-shaped portions 7 and 8. It has a square tube portion 11 constituted by 9 and 10.
[0026]
Further, at the place where the third and fourth plate-shaped portions 9 and 10 are joined, the third plate-shaped portion 9 is provided with a pair of holes 9a provided in the vicinity of the end portions at intervals. And has a band-shaped first mating portion 9b extending on the same plane from the plate portion 9 and a tongue piece 9c protruding from the outer periphery of the hole 9a.
The first mating portion 9b is formed outside the square tube 11 and extends in the direction in which the square tube 11 extends.
[0027]
Further, at the place where the third and fourth plate-shaped portions 9 and 10 are joined, the fourth plate-shaped portion 10 has a convex portion 10a that projects on the same plane from the flat plate portion 10 and fits into the hole 9a. And a band-shaped second fitting portion 10b bent at a right angle from one end of the flat plate portion 10.
The second mating portion 10b is formed outside the square tube portion 11 so as to extend in the direction in which the square tube portion 11 extends, and the width of the second mating portion 10b (the length of the square tube portion 11 extends). (Length in a direction perpendicular to the direction) is formed wider than the width of the first mating portion 9b.
[0028]
Then, the third and fourth plate-like portions 9 and 10 bent at right angles from the first and second plate-like portions 7 and 8 are aligned at right angles to each other, and the protrusion 10a is fitted into the hole 9a. As a result, the tip of the convex portion 10a is caulked in the direction in which the rectangular tube portion 11 extends.
When the third and fourth plate portions 9 and 10 are joined, the first and second joining portions 9b and 10b have a step in a direction orthogonal to the direction in which the rectangular tube portion 11 extends. They are fitted together.
[0029]
That is, as shown in FIG. 3, the second mating portion 10b protrudes longer than the first mating portion 9b, and the first mating portion is closer to the square tube portion 11 from the outer end of the second mating portion 10b. 9b is located.
[0030]
In this state, as shown in FIG. 4, the tongue piece 9 c (indicated by a two-dot line) is bent in the direction of arrow A, and the tongue piece 9 c is superimposed on the outer surface of the fourth plate portion 10.
At this time, the fourth plate-shaped portion 10 is pushed in the direction of arrow B. However, since the convex portion 10a is fitted in the hole 9a, the deformation of the fourth plate-shaped portion 10 in the direction of arrow B is extremely large. As a result, the deformation of the rectangular tube portion 11 is eliminated.
[0031]
Thereafter, the feed horn 6 is formed on the stepped portions of the first and second mating portions 9b and 10b by applying solder 12 in the extending direction of the rectangular tube portion 11 to eliminate a gap therebetween. It has become so.
At this time, the wide second joining portion 10b serves as a receiver for the solder 12, so that soldering between them can be easily performed, reliable soldering can be performed, and a solder-free one can be obtained.
[0032]
In the above embodiment, the first mating portion 9b extends from the plate portion 9 on the same plane, and the second mating portion 10b is bent at a right angle from the flat plate portion 10. The first mating portion 9b may be bent at a right angle from the plate-like portion 9, and the second mating portion 10b may extend from the flat plate portion 10 on the same plane.
[0033]
In the above-described embodiment, the projection 10a of the fourth plate 10 is fitted into the hole 9a in the third plate 9, but the fourth plate 10 is provided with a hole. The protrusion provided on the third plate-shaped portion 9 may be fitted into the hole.
[0034]
FIG. 5 shows a second embodiment of the feed horn of the converter for receiving satellite broadcasting according to the present invention. In the second embodiment, the band-shaped first joining portion 9b provided on the third plate portion 9 is provided. The width is wider than the width of the second mating portion 10b provided on the fourth plate-shaped portion 10, and the solder 12 is attached to the step portion between them.
The other configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals, and description thereof is omitted here.
[0035]
FIG. 6 shows a third embodiment of the feed horn of the satellite broadcast receiving converter according to the present invention. In the third embodiment, the tongue piece 9c provided on the third plate portion 9 is not bent. It has been stretched straight.
The other configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals, and description thereof is omitted here.
[0036]
【The invention's effect】
The feed horn of the satellite broadcast receiving converter according to the present invention includes a rectangular tubular feed horn formed by bending a metal plate, and the feed horns are first and second bent at right angles while being connected to each other. A plate-shaped portion, a third plate-shaped portion bent at a right angle while being connected to the first plate-shaped portion, and a fourth plate-shaped bent at a right angle while connected to the second plate-shaped portion And a feed horn, wherein the third and fourth plate-shaped portions are aligned at a right angle to each other, and the feed horn has a square tubular portion formed of the first, second, third, and fourth plate-shaped portions. The third plate-shaped portion has a band-shaped first joining portion provided in a direction in which the rectangular tube portion extends outside the rectangular tube portion, and the fourth plate-shaped portion has a rectangular shape outside the rectangular tube portion. It has a band-shaped second joining portion provided in the direction in which the cylindrical portion extends, and the first and second joining portions are It has a configuration which is combined together with a step in a direction perpendicular to the direction of extension of the square tubular portion.
With such a configuration, when soldering is performed on the step portion of the first and second joining portions, the wide joining portion serves as a receiver for the solder, so that the soldering work between the two is easy, and reliable soldering is performed. And a solder-free product can be obtained.
[0037]
One of the first and second mating portions is formed to extend on the same plane from the flat plate portion, and the other of the first and second mating portions is formed by being bent at a right angle from the flat plate portion. Therefore, the processing of the first and second joining portions is easy, and the two can be reliably overlapped.
[0038]
Also, one of the third and fourth flat plate portions is provided with a convex portion extending on the same plane from the flat plate portion, and the other of the third and fourth flat plate portions has a hole into which the convex portion fits. Since the projections are fitted into the holes and the third and fourth plate-shaped portions are aligned at right angles to each other, the locking state at the joint of the third and fourth plate portions is reliable, A rectangular tube with a small deformation can be obtained.
[0039]
In addition, since the tip of the convex portion is caulked in the direction in which the rectangular tube portion extends, deformation of the rectangular tube portion is small, and the connection at the joining position of the third and fourth flat plate portions can be strengthened.
[0040]
Further, the flat plate portion is provided with a tongue piece protruding from the outer periphery of the hole, and this tongue piece is bent and overlapped on the outer surface of the flat plate portion having the convex portion, so that the deformation of the square tube portion is small, and (3) The connection at the joining portion of the fourth flat plate portion can be strengthened.
[Brief description of the drawings]
FIG. 1 is a side view showing an outline of a converter for receiving satellite broadcasting according to the present invention.
FIG. 2 is a perspective view of a feed horn of the satellite broadcast receiving converter according to the first embodiment of the present invention.
FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;
FIG. 4 is a sectional view taken along line 4-4 in FIG. 2;
FIG. 5 is a cross-sectional view of a feed horn of a satellite broadcast receiving converter according to a second embodiment of the present invention.
FIG. 6 is a sectional view of a feed horn of a feed horn of a satellite broadcast receiving converter according to a third embodiment of the present invention.
FIG. 7 is a side view showing an outline of a conventional converter for receiving satellite broadcasting.
FIG. 8 is a perspective view showing a feed horn of a conventional converter for receiving satellite broadcasting.
FIG. 9 is a sectional view taken along line 9-9 in FIG. 8;
FIG. 10 is a sectional view taken along line 10-10 in FIG. 8;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Frame 2 Lid 3 Circuit board 4 Grounding pattern 5 Connector 6 Feed horn 7 First plate portion 8 Second plate portion 9 Third plate portion 9a Hole 9b First mating portion 9c Tongue piece 10 Fourth plate-shaped part 10a Convex part 10b Second mating part 11 Square tube part 12 Solder

Claims

A rectangular tube-shaped feed horn formed by bending a metal plate is provided. The feed horn includes a first and a second plate-like portion bent at a right angle while being connected to each other, and the first plate-like portion. A third plate-shaped portion bent at a right angle in a connected state, and a fourth plate-shaped portion bent at a right angle in a connected state to the second plate-shaped portion, and the feed horn has: The third and fourth plate-shaped portions are aligned at a right angle to each other, and a quadrangular tube portion composed of the first, second, third and fourth plate-shaped portions is provided, and the third plate-shaped portion is provided. The portion has a band-shaped first joining portion provided in a direction in which the square tube portion extends outside the square tube portion, and the fourth plate-shaped portion has the square tube portion outside the square tube portion. And a second band-like joining portion provided in a direction in which the first and second joining portions extend. Converter for receiving satellite broadcasting feed horn, characterized in that in the direction orthogonal to the direction of extension of the square tubular portion was combined with each other with a step.

One of the first and second mating portions is formed to extend on the same plane from the flat plate portion, and the other of the first and second mating portions is bent at a right angle from the flat plate portion. The feed horn of a converter for receiving satellite broadcasting according to claim 1, wherein the feed horn is formed.

One of the third and fourth flat portions is provided with a convex portion extending on the same plane from the flat portion, and the other of the third and fourth flat portions is fitted with the convex portion. 3. A satellite broadcast receiving apparatus according to claim 1, wherein a hole is provided, and said convex portion is fitted into said hole, and said third and fourth plate-shaped portions are aligned at right angles to each other. Converter feed horn.

4. The feed horn for a converter for receiving satellite broadcasting according to claim 3, wherein a tip end of said convex portion is caulked in a direction in which said square tube portion extends.

The flat plate portion is provided with a tongue protruding from the outer periphery of the hole, and the tongue is bent and overlapped on the outer surface of the flat plate having the projection. Or the feed horn of the converter for receiving satellite broadcasting according to 4.