JP4109482B2

JP4109482B2 - Lid structure for lids in electronic equipment

Info

Publication number: JP4109482B2
Application number: JP2002111124A
Authority: JP
Inventors: 康弘伊藤
Original assignee: Maspro Denkoh Corp
Current assignee: Maspro Denkoh Corp
Priority date: 2002-04-12
Filing date: 2002-04-12
Publication date: 2008-07-02
Anticipated expiration: 2022-04-12
Also published as: JP2003309380A

Description

【０００１】
【発明の属する技術分野】
本発明は，内部に増幅回路，コンバーター回路など種々の高周波回路を納めるようにした電子機器におけるケースにおいて，ケースに設けたねじ孔に螺合可能な雄ねじを備えた蓋体を，ケースに繋ぎ止めする構造に関する。
【０００２】
【従来の技術】
この種の電子機器には，動作状態でその動作状態のチェックを行ったり，各種調整を行なったりすることがある。
そこで，ケース内の回路基板に，例えばモニター端子を設けたり，利得調整ボリュームを設けたりするとともに，これらの部品と対向するケース箇所にねじ孔を設け，このねじ孔を利用して，レベルの測定を行ったり，利得調整をしている。
そして，このねじ孔には蓋体を着脱可能に取付けるようにしており，この蓋体はケースから取り外す時に取り落としの無いよう，例えば合成樹脂製材料でできた紐体や，周知のボールチェーン等でケースに繋ぎ止められている。
図１３には蓋体２０を繋ぎ止めする連結手段として，合成樹脂製材料の紐体５１で構成したものを示す。
この従来例では，電子機器のケース１の内側に止めねじで前記紐体の一方端を係止した止金具５５を固定し，紐体５１の他方端には球状の抜け止めビード５２が形成され，当該抜け止めビード５２は蓋体２０のねじ先に設けられた凹部５４に嵌め込み後，その凹部５４の周縁をかしめ加工し，そのかしめ部５３によって抜き止めがなされるようになっているとともに，蓋体２０と紐体５１は相対的に回転自在なようになり，蓋体２０を着脱自在にしている。（例えば，実公昭６２−４２５５１公報参照）
【０００３】
次に，図１４に示すように，ケース１と蓋体２０の連結手段として，ボールチェーン６１を用いる方法がある。
この従来例では，電子機器のケース１の側壁に止めねじでボールチェーン６１の一方端側に設けられた止金具６２を固定し，ボールチェーン６１の他方端には連結片６３を有し，連結片６３には取付子６４が連結され，取付子６４の自由端部にはコイル部６５が形成され，このコイル部６５を蓋体２０に設けた環状溝６６に遊嵌することで蓋体２０を着脱自在にしている。（例えば，特開平１１−２９１６９公報参照）
【０００４】
【発明が解決しようとする課題】
図１３に示す合成樹脂製材料を用いた紐体を用いる方法は，部品点数を少なく，コスト的にも安価にでき，蓋体をケースに締め付けたときに，連結手段である前記紐体がケース内に収納されるので，雨風や紫外線等にさらされることが無く良い方法ではあるが，一方で連結手段をケース内に収納するため，紐体が細く形成されているので，蓋体をケースに締め付けたときに，紐体がケース内に一定の形に屈曲して収納されることが無く，蓋体の着脱の際に，紐体が回路基板に設けられた部品に絡みつくといった問題があった。
更にまた，ケース内に屈曲して収納された紐体には常にテンションが加わっており，紐体が蓋体のねじ先に形成されたかしめ部に押付けられる状態にあり，紐体の着脱を繰り返す際に，前記かしめ部において紐体がうまく回転しないことがあり，この結果，紐体が捩れ，ひどい時は切断してしまう恐れがある，と言った問題があった。
また，ボールチェーンを用いた方法は，部材が多いことから，組付けに時間が掛かるとともに，材料費も高く，コストアップの要因となっていた。また，連結手段がケースの外に設けられているため，紫外線や雨風に耐え得るような，対候性の良い強固なものを作る必要があった。
本発明は，こうした問題を解決するためになされたものであり，電子機器のケースに形成された点検用のねじ孔から蓋体を取り外したときに蓋体を落とすことのないよう，蓋体とケースとを連結手段により接続する繋ぎ止め構造において，蓋体をねじ孔で回転させてケースに固定する際，連結手段がケース内に収納されて，略一定の形状を保つようにすることを目的とする。
【０００５】
【課題を解決するための手段】
かかる目的を達成するためになされた請求項１に記載の発明は，
被調整回路要素を備えた回路基板を収納する電子機器のケースに，前記被調整回路要素の操作部材と対向するねじ孔を設け，前記ねじ孔には，前記ねじ孔を塞ぎ得る大きさでしかも前記ねじ孔と螺合可能な雄ねじを備えさせた蓋体を，着脱自在に螺着可能にするとともに，前記蓋体を連結手段を介してケースに繋ぎ止める構造において，
前記連結手段は，板状で屈曲自在に形成され，
前記連結手段の一方端は，ケース内部の係止手段に係止され，
前記連結手段の他方端は，当該連結手段に形成された挿通孔に止着ねじを通し，該止着ねじを前記蓋体のねじ先に形成されたねじ穴に止着することにより，前記蓋体のねじ先に回転自在に連結されていることを特徴とする。
【０００７】
【発明の実施の形態】
以下に，本発明を具体化した実施形態の１例を，図面を基に詳細に説明する。
図１乃至図４において，１はケースであり，本願では高周波機器の一例として示すテレビ受信用増幅器を示し，壁面２にねじ取付部３を当接させねじ孔３ｂに止着ねじ３ａ挿通させ止着してある。
このテレビ受信用増幅器のケース１は，前面が開放されたケース本体４と，ケース本体４の開放部を覆うようにケース本体４に対し止着ねじ５によって止着されたカバー６とから成り，一例としてアルミニウム製のもので形成されている。
ケース本体４にはカバー６とケース本体４が当接する周縁部に凹溝１８が設けられており，当該凹溝１８には防水パッキン１０が取付けられ，本願の高周波機器の防水性を確保している。
このケース本体４において，５ｂは止着ねじ５を締め付けるねじ穴，４１はＦ型コネクター，４２はアース接続端子，７はケース本体内部から立設させた支持柱である。８はケース本体４の中空部に収められた高周波回路を示し，周知の如くねじ棒７ａによって支持柱７に固定された回路基板９と回路基板９に取付けられた多数の回路要素９ａとからなる。
尚１１は被調整回路要素で，一例として可変抵抗器を示す。１１ａはその回転軸で，操作部材の一例として示される。
【０００８】
次に，カバー６にはカバー６とケース本体４が当接する周縁部に凹溝１２が設けられており，当該凹溝１２にはシールドメッシュ１３が取付けられ，本願の高周波機器の外部雑音や妨害電波に対するイミュニティーを確保している。またカバー６には，点検用のねじ孔１４が，後述の操作部材等と対向する位置に穿設してある。５ａは止着ねじ５を挿通する挿通穴である。１５はケース内に設けられた係止手段であり，連結手段３０の一方端を係止する。
【０００９】
次に，蓋体について図５を用いて説明する。
２０は蓋体であり，本願では真鍮にニッケルメッキを施したもので形成されており，図５に示される如く上記ねじ孔１４を塞ぐに十分な大きさに形成してある。２１は雄ねじを示し，前記ねじ孔１４の雌ねじと螺合するように形成されている。２２は蓋体２０の表面となる側に形成した嵌合溝を示す。ねじ軸２３の基部には防水用のＯリング２４を嵌める溝２５を形成している。２６はねじ穴で後述の連結手段３０の止部をねじで止着するものである。
【００１０】
次に連結手段について図６を用いて説明する。
３０は連結手段を示し，これにおいて３１は係止部，３２は連結部，３３は止部で，本願では合成樹脂製材料（例えば，ＰＥＴ）で図６に示す如く板状に形成されている。
次に，連結部材３０を蓋体に連結する方法について図７を用いて述べる。
３３は連結手段３０の他方端に設けられた止部で，前記蓋体２０のねじ先（ケース本体内の中空部と対抗する面）に形成されたねじ穴２６に止着ねじ２７でもって取付けられている。
この時，前記止着ねじ２６の軸部の寸法が，前記ねじ穴２６の雌ねじ形成部分よりやや長くなるように形成され，止着ねじ２７のねじ頭と前記蓋体２０のねじ先が当接しないよう構成されるとともに，止部３３に形成された挿通孔３３ａの直径が，前記止着ねじ２７の直径よりやや大きくなるように形成されているので，連結手段３０と蓋体２０は相対的な回転が可能となる。
蓋体２０に連結手段３０の止部３３を取付けたあと，連結手段３０をねじ孔１４に挿通してから，蓋体２０をねじ孔１４に締め付ける。
次に，連結手段３０の係止部３１をカバー６に設けられた係止手段１５に係止する。
【００１１】
次に連結手段３０の係止部３１の係止方法について図３，図６及び図８をもとに詳細に説明する。
３１は連結手段３０の一方端に設けられた係止部であり，カバー６に設けられた前記係止手段１５に係止される。係止手段１５はカバー６の内側にカバー６同一材料で一体に設けられたもので，図３及び図８に示す如く断面略逆Ｌ字型に突設させた係止片１６，１７を相対抗させるよう形成されており，夫々の係止片の基部１６ａと１７ａ間の寸法をＬ１，夫々の係止片の端部１６ｂと１７ｂ間の寸法をＬ２となるよう形成されている。
【００１２】
次に，連結手段３０には，図６に示すように凹部３４が設けられている。ここで，連結手段３０の軸線にたいして，係止部３１の幅をＷ１，凹部３４間の幅をＷ２とする。
まず，図８に示す如く連結手段３０の凹部３４部分で連結手段３０を略９０度曲げる。つぎに，凹部３４と上記係止片の端部１６ｂと１７ｂとが嵌合するよう配置する。
次に，凹部３４が係止片の長手方向に向かって圧入されるよう係止部３１を押し込む。こうして連結手段３０の係止部３１は，上記係止片の基部１６ａと１７ａの間に収納される。
この時，係止部３１の幅Ｗ１を係止片の基部１６ａと１７ａ間の寸法Ｌ１よりやや大きくなるように形成し，凹部３４間の幅Ｗ２を係止片の端部１６ｂと１７ｂ間の寸法Ｌ２よりやや大きくなるように形成することで連結手段３０は係止手段１５に確実に挟持される。
【００１３】
次に，連結手段３０の取付状態について図９及び図１０について詳細に説明する。
上述のようにケース１と蓋体２０は連結手段３０を介して連結される。従って，連結手段の軸方向の長さは，蓋体２０をカバー６のねじ孔１４から取り外したときに，当該ねじ孔１４から操作部材１１ａの操作を行おうとするときに，前記蓋体２０が操作の邪魔にならない長さであって，蓋体２０をカバー６のねじ孔１４に締め付けたときに，回路基板９に取付けられた多数の回路要素９ａに触れないように決める必要がある。この結果，蓋体２０をカバー６のねじ孔１４に締め付けたときの，連結手段３０の収納時の形状は図９に示すようになる。
【００１４】
連結手段３０は本願では合成樹脂製材料（例えば，ＰＥＴなど）を用いて形成されており，その厚さは本願では略０．２ｍｍと薄く，連結手段３０の軸方向の曲げに対しては自在にまげることができ，上述のような収納時の形状となる。
しかし，本願の連結手段３０は図７に示すように板状に形成されているので，連結手段３０の軸方向に直角方向の曲げは自在にできない。つまり，前記蓋体２０をカバー６のねじ孔１４から取り外すために，蓋体２０を回転させている間，連結手段３０には，収納時と同じ略一定形状を保とうとする力が働く。
更に加えて，上述に述べたように，連結手段３０と蓋体２０は相対的な回転が可能となるよう構成されているので，蓋体２０がカバー６のねじ孔１４に締め付けられるときも，取り外されるときも，連結手段３０は略一定形状を保つ。
【００１５】
次に，連結手段３０の他の実施例について図１１を用いて説明する。なお機能上前図のものと同一または均等構成の部分には同一の符号を用いて説明を省略した。
図１１に示すように，連結手段３０は係止部３１，連結部３２，止部３３，凹部３４，当付部３５から成り，本願では合成樹脂製材料（例えば，ＰＥＴ）で板状に形成されている。係止部３１，連結部３２，止部３３の構成は上述の如くである。
連結手段３０は，図１２に示すようにケース内に収納される。このため，連結部３２はばねの働きをして，係止部３１が係止手段１５から外れようとする方向に力が加えられる。この実施例はこれに対応するものである。
連結手段の係止部３１がカバー６の係止手段１５に係止されると，当付部３５は図１２に示すように，係止手段１５から回路基板９方向に突出した状態となる。
当付部３５の軸方向の長さは，係止部３１が係止手段１５に係止された状態で，当付部３５の端部３５ａが，ケース本体４に設けられたボスまたはリブ７ｂ，或いは，回路基板９（本願の実施例においてはリブ７ｂ）に当接するように形成されており，連結部３２のばねの働きによって，連結手段３０の係止部３１が係止手段１５から外れようとする力を押えることができより確実に係止できる。
【００１６】
次に，上述以外の実施例について例をあげる。まず，連結手段３０の他の素材の実施例について説明する。本願のケースの実施例はアルミダイカストで形成されており，上述の如くカバー６とケース本体４の当接する周縁部にはシールドメッシュを設け，ケースの外部雑音や妨害電波に対するイミュニティーを重視した構成となっている。従って，連結手段３０も金属製で薄板状に形成したものでもよい。
次に，ケース１が合成樹脂製材料（例えば，ＡＢＳ）で構成されている場合について説明する。この場合，外来雑音や妨害電波に対するイミュニティーを確保するためには，回路要素を備えた回路基板を周知のシールドケースに収納してユニット状に構成する。これにより，軽量でシールド性に優れたケースが提供できる。この時，蓋体１４も合成樹脂製材料（例えば，ＡＢＳ）で形成されていてもよく，連結手段３０も合成樹脂製材料（例えば，ＰＥＴ）を使用することで，ケースの一層の軽量化がはかれる。
尚，本願に示すのは実施例であり，例えばケース１，連結手段２０，係止手段１５等の形状，厚み，材料等は上述の限りではない。
【００１７】
次に上記構成のものにあって操作部材１１ａの操作を行おうとする場合には，図９の状態にある蓋体２０の嵌合溝２２に，例えばドライバーを当てがって蓋体２０を回動させ，これを図１０のようにケース１から外す。この後操作部材１１ａを操作する。操作が終わったならば，再び連結手段３０（連結部３２）をねじ孔１４からケース１内に収納して，蓋体２０をねじ孔１４に螺着すれば良い。
本願においては，ねじ孔１４から操作するものとして，利得調整等に使用する可変抵抗器の例を示したが，例えば，アッテネーター等の入り切りを切換えるスライドスイッチの操作用ノブが置かれてもよいし，更にまた，レベル等をチェックする為のコネクターが配設されてもよい。チェックにあたってはねじ孔１４を通して対応プラグを挿入し，接続してレベル測定をする。レベルチェック完了後はコネクターからプラグを離し，回収後，ねじ孔に蓋体２０を螺着する。
【００１８】
尚，本発明は上記実施の形態に限定されるものではなく，本発明の趣旨を逸脱しない範囲で各部の用途や形状を適宜に変更して実施することも可能である。
【００１９】
【発明の効果】
以上詳述したように，請求項１の発明によれば，蓋体をケースに繋ぎ止める連結手段が板状で屈曲自在に形成されている。そして，その連結手段の一方端は，ケース内部の係止手段に係止され，連結手段の他方端は，当該連結手段に形成された挿通孔に止着ねじを通し，この止着ねじを蓋体のねじ先に形成されたねじ穴に止着することにより，蓋体のねじ先に回転自在に連結される。
このため，蓋体をねじ孔に締め付けたときには，連結手段がケース内に収納されることになり，連結手段は，雨風や紫外線等から守られ，安価な材料を用いて構成しても対候性の良い繋ぎ止め構造を実現できる。
【００２０】
また，連結手段は，蓋体のねじ先に回転自在に連結されることから，蓋体をねじ孔に固定する際に蓋体がねじ孔を回転しても，その形状を略一定に保つことができ，連結手段が回路基板に設けられた部品に絡みついたり，ねじれたりするのを防止できる。
【図面の簡単な説明】
【図１】本願のケースの実施例の正面図を示す。
【図２】本願のケースを壁面に取付けたときの側面図を示す。。
【図３】本願のケースにおけるカバーの実施例を示す。
【図４】本願のケースにおけるケース本体の実施例を示す。
【図５】本願の蓋体の実施例を示す。
【図６】本願の連結手段の実施例を示す。
【図７】図５の連結手段の止部を蓋体に蝶着した説明図。
【図８】連結手段の係止部を係止手段に取付ける方法を示す。
【図９】図５の連結手段のケース内における収納状態を示す図１のＨ−Ｈ断面図。
【図１０】図５において蓋体を外した状態であり，操作部材をドライバーで操作する様子を示す図１のＨ−Ｈ断面図。
【図１１】本願の連結手段における他の実施例を示す。
【図１２】図１０の連結手段のケース内における収納状態を示す図１のＨ−Ｈ断面図。
【図１３】紐体を用いた従来例を示す。
【図１４】ボールチェーンを用いた従来例を示す。
【符号の説明】
１…ケース，２…壁面，３…ねじ取付部，３ａ…止着ねじ，３ｂ…ねじ孔，４…ケース本体，５…止着ねじ，６…カバー，７…支持柱，７ａ…ねじ棒，７ｂ…リブ，８…高周波回路，９…回路基板，９ａ…回路要素，１０…防水パッキン，１１…被調整回路要素（一例として可変抵抗器），１１ａ…操作部材，１２…凹溝，１３…シールドメッシュ，１４…ねじ孔，１５…係止手段，１６，１７…係止片，１６ａ，１７ａ…基部，２０…蓋体，２１…雄ねじ，２２…嵌合溝，２３…ねじ軸，２４…Ｏリング，２５…溝，２６…ねじ穴，２７…止着ねじ，３０…連結手段，３１…係止部，３２…連結部，３３…止部，３４…凹部３４，３５…当付部，３５ａ…端部，４０…マスト，４１…Ｆ型コネクター，４２…アース接続端子，４３…マスト取付部材，４４…防水キャップ，４５…モニター端子防水キャップ，５１…紐体，５２…抜け止めビード，５３…かしめ部，５４…凹部，５５…止金具，６１…ボールチェーン，６２…止金具，６３…連結片，６４…取付子，６５…コイル部，６６…環状溝，Ｌ１…基部１６ａと１７ａ間の寸法，Ｌ２…端部１６ｂと１７ｂ間の寸法，Ｗ１…係止部の幅，Ｗ２…凹部間の幅[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a case of an electronic device in which various high-frequency circuits such as an amplifier circuit and a converter circuit are housed, and a lid body having a male screw that can be screwed into a screw hole provided in the case is secured to the case. Related to the structure.
[0002]
[Prior art]
In this type of electronic device, the operating state may be checked or various adjustments may be made in the operating state.
Therefore, for example, a monitor terminal is provided on the circuit board in the case or a gain adjustment volume is provided, and a screw hole is provided in the case portion facing these components, and the level measurement is performed using this screw hole. And gain adjustment.
A lid is detachably attached to the screw hole, and the lid is not removed when removed from the case. For example, a string made of a synthetic resin material or a known ball chain is used. It is tied to the case.
FIG. 13 shows a connecting means for fastening the lid 20 constituted by a string 51 of a synthetic resin material.
In this conventional example , a fastener 55 is fixed to the inside of the case 1 of the electronic device by locking one end of the string body with a set screw, and a spherical retaining bead 52 is formed at the other end of the string body 51. The retaining bead 52 is fitted into a recess 54 provided at the screw tip of the lid 20, and the periphery of the recess 54 is caulked, and the caulking portion 53 prevents the removal bead 52. The lid body 20 and the string body 51 are relatively rotatable so that the lid body 20 is detachable. (For example, refer to Japanese Utility Model Publication 62-42551)
[0003]
Next, as shown in FIG. 14 , there is a method in which a ball chain 61 is used as a connecting means between the case 1 and the lid 20.
In this conventional example , a fastener 62 provided on one end side of the ball chain 61 is fixed to the side wall of the case 1 of the electronic device with a set screw, and a connecting piece 63 is provided on the other end of the ball chain 61. An attachment 64 is connected to the piece 63, and a coil portion 65 is formed at the free end of the attachment 64. The coil 20 is loosely fitted in an annular groove 66 provided in the lid 20, so that the lid 20 Is made detachable. (See, for example, JP-A-11-29169)
[0004]
[Problems to be solved by the invention]
The method using the string body using the synthetic resin material shown in FIG. 13 can reduce the number of parts and the cost, and when the lid body is fastened to the case, the string body which is a connecting means is the case. It is a good method without being exposed to rain or ultraviolet rays because it is housed inside, but on the other hand, since the connecting means is housed in the case, the string is made thin, so the lid is attached to the case. When tightened, there is no problem that the cord body is bent and stored in a fixed shape in the case, and the cord body gets entangled with the parts provided on the circuit board when the lid is attached or detached. .
In addition, the tension is always applied to the cord body that is bent and stored in the case, and the cord body is pressed against the caulking portion formed on the screw tip of the lid body, and the cord body is repeatedly attached and detached. However, there is a problem that the string body may not rotate well at the caulking portion, and as a result, the string body may be twisted and severely cut off.
In addition, the method using the ball chain has many components, so that it takes time to assemble and the material cost is high, which causes a cost increase. In addition, since the connecting means is provided outside the case, it is necessary to make a strong and weather-resistant material that can withstand ultraviolet rays and rain and wind.
The present invention has been made to solve these problems, and the lid body and the lid body should not be dropped when the lid body is removed from the screw hole for inspection formed in the case of the electronic device. In a tether structure for connecting a case to a case by means of connecting means, the purpose is to keep the connecting means housed in the case and maintain a substantially constant shape when the lid is rotated by a screw hole and fixed to the case. And
[0005]
[Means for Solving the Problems]
The invention described in claim 1 made to achieve such an object,
The electronic device case for storing the circuit board having the adjustable circuit element, said operating member opposed to the screw hole of the adjusting circuit element is provided, said screw holes, be approximately the size of obtaining closing the screw hole In a structure in which a lid provided with a male screw that can be screwed into the screw hole can be detachably screwed, and the lid is fastened to a case via a connecting means,
The connecting means is formed in a plate shape and bendable,
One end of the connecting means is locked to the locking means inside the case,
The other end of the connecting means passes through a set screw through an insertion hole formed in the connecting means, and the set screw is fixed in a screw hole formed in a screw tip of the lid body. characterized in that the screw destination body is rotating freely connected.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment embodying the present invention will be described in detail with reference to the drawings.
1 to 4 , reference numeral 1 denotes a case. In the present application, reference numeral 1 denotes a television receiver amplifier as an example of a high-frequency device. A screw mounting portion 3 is brought into contact with a wall surface 2, and a fixing screw 3 a is inserted into a screw hole 3 b. I wear it.
A case 1 of this television receiving amplifier is composed of a case main body 4 whose front surface is open, and a cover 6 fixed to the case main body 4 with a fixing screw 5 so as to cover the open portion of the case main body 4. As an example, it is made of aluminum.
The case body 4 is provided with a groove 18 at the peripheral edge where the cover 6 and the case body 4 abut. A waterproof packing 10 is attached to the groove 18 to ensure the waterproof property of the high-frequency device of the present application. Yes.
In this case main body 4, 5 b is a screw hole for tightening the fixing screw 5, 41 is an F-type connector, 42 is a ground connection terminal, and 7 is a support column erected from the inside of the case main body. Reference numeral 8 denotes a high-frequency circuit housed in the hollow portion of the case body 4, and is composed of a circuit board 9 fixed to the support column 7 by a screw rod 7a and a number of circuit elements 9a attached to the circuit board 9 as is well known. .
Reference numeral 11 denotes a circuit element to be adjusted, which shows a variable resistor as an example. Reference numeral 11a denotes a rotating shaft, which is shown as an example of an operation member.
[0008]
Next, the cover 6 is provided with a groove 12 at the peripheral edge where the cover 6 and the case body 4 abut, and a shield mesh 13 is attached to the groove 12 to prevent external noise and interference of the high-frequency device of the present application. Ensures immunity to radio waves. Further, a screw hole 14 for inspection is formed in the cover 6 at a position facing an operation member and the like which will be described later. 5a is an insertion hole through which the fastening screw 5 is inserted. Reference numeral 15 denotes locking means provided in the case, which locks one end of the connecting means 30.
[0009]
Next, the lid will be described with reference to FIG .
Reference numeral 20 denotes a lid, which is formed by applying nickel plating to brass in the present application, and is formed in a size sufficient to close the screw hole 14 as shown in FIG . Reference numeral 21 denotes a male screw, which is formed so as to be screwed with the female screw of the screw hole 14. Reference numeral 22 denotes a fitting groove formed on the side to be the surface of the lid 20. A groove 25 for fitting a waterproof O-ring 24 is formed at the base of the screw shaft 23. Reference numeral 26 denotes a screw hole for fastening a stop portion of a connecting means 30 described later with a screw.
[0010]
Next, the connecting means will be described with reference to FIG .
Reference numeral 30 denotes a connecting means, in which 31 is a locking portion, 32 is a connecting portion, and 33 is a stopping portion, which in this application is made of a synthetic resin material (for example, PET) and is formed in a plate shape as shown in FIG. .
Next, a method for connecting the connecting member 30 to the lid will be described with reference to FIG .
Reference numeral 33 denotes a stopper provided at the other end of the connecting means 30, which is attached with a fixing screw 27 to a screw hole 26 formed in the screw tip of the lid 20 (surface facing the hollow part in the case body). It has been.
At this time, the dimension of the shaft portion of the fixing screw 26 is formed to be slightly longer than the female screw forming portion of the screw hole 26, and the screw head of the fixing screw 27 and the screw tip of the lid body 20 abut. In addition, since the diameter of the insertion hole 33a formed in the stop portion 33 is formed to be slightly larger than the diameter of the fastening screw 27, the connecting means 30 and the lid body 20 are relatively Rotation is possible.
After attaching the stopper 33 of the connecting means 30 to the lid 20, the connecting means 30 is inserted into the screw hole 14, and then the lid 20 is fastened to the screw hole 14.
Next, the locking portion 31 of the connecting means 30 is locked to the locking means 15 provided on the cover 6.
[0011]
Next engaging method of the locking portion 31 of the connecting means 30 3, based on the detailed description of the FIGS. 6 and 8.
Reference numeral 31 denotes a locking portion provided at one end of the connecting means 30, which is locked to the locking means 15 provided on the cover 6. The locking means 15 is integrally provided on the inner side of the cover 6 with the same material as the cover 6, and includes locking pieces 16 and 17 projecting in a substantially inverted L shape in cross section as shown in FIGS. It is formed so as to oppose, and the dimension between the base portions 16a and 17a of the respective locking pieces is L1, and the dimension between the end portions 16b and 17b of each locking piece is L2.
[0012]
Next, the coupling means 30, recesses 34 are provided as shown in FIG. Here, with respect to the axis of the connecting means 30, the width of the locking portion 31 is W1, and the width between the recesses 34 is W2.
First, as shown in FIG. 8 , the connecting means 30 is bent approximately 90 degrees at the concave portion 34 of the connecting means 30. Next, it arrange | positions so that the recessed part 34 and the edge parts 16b and 17b of the said locking piece may fit.
Next, the locking part 31 is pushed in so that the recess 34 is press-fitted in the longitudinal direction of the locking piece. Thus, the locking portion 31 of the connecting means 30 is accommodated between the base portions 16a and 17a of the locking piece.
At this time, the width W1 of the locking portion 31 is formed to be slightly larger than the dimension L1 between the base portions 16a and 17a of the locking pieces, and the width W2 between the recesses 34 is set between the end portions 16b and 17b of the locking pieces. The connecting means 30 is securely held by the locking means 15 by being formed so as to be slightly larger than the dimension L2.
[0013]
Will now be described in detail FIGS. 9 and 10 for mounting state of the coupling means 30.
As described above, the case 1 and the lid 20 are connected via the connecting means 30. Therefore, the axial length of the connecting means is such that when the lid 20 is removed from the screw hole 14 of the cover 6, the lid 20 is operated when the operation member 11 a is operated from the screw hole 14. It is a length that does not interfere with the operation, and it is necessary to decide not to touch many circuit elements 9 a attached to the circuit board 9 when the lid 20 is fastened to the screw hole 14 of the cover 6. As a result, when the lid 20 is fastened to the screw hole 14 of the cover 6, the shape of the connecting means 30 when stored is as shown in FIG .
[0014]
In the present application, the connecting means 30 is formed using a synthetic resin material (for example, PET), and the thickness thereof is as thin as approximately 0.2 mm in the present application, and is free from bending of the connecting means 30 in the axial direction. It can be bent and becomes the shape at the time of storage as described above.
However, since the connecting means 30 of the present application is formed in a plate shape as shown in FIG. 7, bending in the direction perpendicular to the axial direction of the connecting means 30 cannot be made freely. That is, in order to remove the lid body 20 from the screw hole 14 of the cover 6, while the lid body 20 is rotated, a force is applied to the connecting means 30 so as to maintain the substantially constant shape as in the storage.
In addition, as described above, the connecting means 30 and the lid 20 are configured to be capable of relative rotation, so that when the lid 20 is fastened to the screw hole 14 of the cover 6, Even when removed, the connecting means 30 maintains a substantially constant shape.
[0015]
Next, another embodiment of the connecting means 30 will be described with reference to FIG . Functionally, the same reference numerals are used for the same or equivalent parts as in the previous figure, and the description is omitted.
As shown in FIG. 11 , the connecting means 30 includes a locking portion 31, a connecting portion 32, a stopping portion 33, a concave portion 34, and an abutting portion 35, and is formed in a plate shape with a synthetic resin material (for example, PET) in the present application. Has been. The structure of the latching | locking part 31, the connection part 32, and the stop part 33 is as above-mentioned.
Coupling means 30 is housed in the case as shown in FIG. 12. For this reason, the connecting portion 32 acts as a spring, and a force is applied in a direction in which the locking portion 31 tends to be detached from the locking means 15. This embodiment corresponds to this.
When the locking part 31 of the connecting means is locked to the locking means 15 of the cover 6, the contact part 35 protrudes from the locking means 15 toward the circuit board 9 as shown in FIG. 12 .
The length of the contact portion 35 in the axial direction is such that the end portion 35a of the contact portion 35 is a boss or rib 7b provided on the case body 4 in a state where the engagement portion 31 is engaged with the engagement means 15. Alternatively, it is formed so as to contact the circuit board 9 (the rib 7b in the embodiment of the present application), and the locking portion 31 of the connecting means 30 is disengaged from the locking means 15 by the action of the spring of the connecting portion 32. The force to be pressed can be pressed and can be locked more reliably.
[0016]
Next, examples will be given for embodiments other than those described above. First, an embodiment of another material of the connecting means 30 will be described. The embodiment of the case of the present application is formed by aluminum die casting, and as described above, a shield mesh is provided at the peripheral edge where the cover 6 and the case body 4 are in contact with each other, and the configuration emphasizes immunity to external noise and jamming waves of the case. It has become. Therefore, the connecting means 30 may be made of metal and formed into a thin plate shape.
Next, a case where the case 1 is made of a synthetic resin material (for example, ABS) will be described. In this case, in order to ensure immunity against external noise and jamming radio waves, a circuit board provided with circuit elements is housed in a well-known shield case to form a unit. This makes it possible to provide a lightweight case with excellent shielding properties. At this time, the lid 14 may also be formed of a synthetic resin material (for example, ABS), and the connecting means 30 also uses a synthetic resin material (for example, PET), thereby further reducing the weight of the case. It is peeled off.
In addition, what is shown in this application is an Example, For example, the shape, thickness, material, etc. of the case 1, the connecting means 20, the locking means 15 and the like are not limited to the above.
[0017]
Next, when the operation member 11a is to be operated with the above configuration, for example, a screwdriver is applied to the fitting groove 22 of the lid 20 in the state of FIG. This is removed from the case 1 as shown in FIG . Thereafter, the operation member 11a is operated. When the operation is completed, the connecting means 30 (connecting portion 32) may be accommodated again in the case 1 from the screw hole 14 and the lid 20 may be screwed into the screw hole 14.
In the present application, an example of a variable resistor used for gain adjustment or the like has been shown as being operated from the screw hole 14, but, for example, a slide switch operation knob for switching on / off of an attenuator or the like may be placed. Furthermore, a connector for checking the level or the like may be provided. In checking, the corresponding plug is inserted through the screw hole 14 and connected to measure the level. After the level check is completed, the plug is removed from the connector, and after recovery, the lid 20 is screwed into the screw hole.
[0018]
Note that the present invention is not limited to the above-described embodiment, and can be implemented by appropriately changing the application and shape of each part without departing from the spirit of the present invention.
[0019]
【The invention's effect】
As described in detail above, according to the first aspect of the present invention, the connecting means for connecting the lid to the case is formed in a plate shape and bendable. Then, one end of the connecting means is locked inside the locking means the case, the other end of the consolidated unit is passed through a fastening screw insertion hole formed in the connecting means, the fastening screw by fastening the screw hole formed in the screw destination of the lid, Ru is connected in a freely rotating on the threaded destination of the lid.
For this reason, when the lid is tightened into the screw hole , the connecting means is accommodated in the case, and the connecting means is protected from rain and ultraviolet rays , and may be configured using an inexpensive material. A weathering-resistant tether structure can be realized .
[0020]
In addition, since the connecting means is rotatably connected to the screw tip of the lid , the shape of the lid can be kept substantially constant even if the lid rotates the screw hole when the lid is fixed to the screw hole. It is possible to prevent the connecting means from being entangled or twisted with the components provided on the circuit board .
[Brief description of the drawings]
FIG. 1 shows a front view of an embodiment of the case of the present application.
FIG. 2 shows a side view when the case of the present application is attached to a wall surface. .
FIG. 3 shows an embodiment of a cover in the case of the present application.
FIG. 4 shows an example of a case body in the case of the present application.
FIG. 5 shows an embodiment of the lid body of the present application.
FIG. 6 shows an embodiment of the connecting means of the present application.
7 is an explanatory view in which a stopper of the connecting means of FIG. 5 is hinged to a lid.
FIG. 8 shows a method of attaching a locking portion of the connecting means to the locking means.
9 is a cross-sectional view taken along the line HH in FIG. 1 showing a storage state of the connecting means in FIG. 5 in the case.
10 is a cross-sectional view taken along the line HH in FIG. 1 showing a state in which the operating member is operated with a screwdriver in a state where the lid is removed in FIG. 5;
FIG. 11 shows another embodiment of the connecting means of the present application.
12 is a cross-sectional view taken along the line HH in FIG. 1 showing a storage state of the connecting means in FIG. 10 in the case.
FIG. 13 shows a conventional example using a string body.
FIG. 14 shows a conventional example using a ball chain.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Case, 2 ... Wall surface, 3 ... Screw mounting part, 3a ... Fastening screw, 3b ... Screw hole, 4 ... Case main body, 5 ... Fastening screw, 6 ... Cover, 7 ... Support pillar, 7a ... Screw rod, 7 ... Rib, 8 ... High frequency circuit, 9 ... Circuit board, 9a ... Circuit element, 10 ... Waterproof packing, 11 ... Adjusted circuit element (variable resistor as an example), 11a ... Operating member, 12 ... Dove groove, 13 ... Shield mesh, 14 ... screw hole, 15 ... locking means, 16, 17 ... locking piece, 16a, 17a ... base, 20 ... lid, 21 ... male screw, 22 ... fitting groove, 23 ... screw shaft, 24 ... O-ring, 25 ... groove, 26 ... screw hole, 27 ... fastening screw, 30 ... coupling means, 31 ... locking portion, 32 ... coupling portion, 33 ... locking portion, 34 ... concave portion 34, 35 ... contact portion, 35a ... end, 40 ... mast, 41 ... F-type connector, 42 ... ground connection terminal, 43 ... mast Attached member, 44 ... waterproof cap, 45 ... monitor terminal waterproof cap, 51 ... string, 52 ... retaining bead, 53 ... caulking portion, 54 ... recessed portion, 55 ... fastener, 61 ... ball chain, 62 ... fastener 63: connecting piece, 64: attachment, 65: coil portion, 66: annular groove, L1: dimension between the base portions 16a and 17a, L2: dimension between the end portions 16b and 17b, W1: width of the locking portion, W2 ... width between recesses

Claims

The electronic device case for storing the circuit board having the adjustable circuit element, said operating member opposed to the screw hole of the adjusting circuit element is provided, said screw holes, be approximately the size of obtaining closing the screw hole In a structure in which a lid provided with a male screw that can be screwed into the screw hole can be detachably screwed, and the lid is fastened to a case via a connecting means,
The connecting means is formed in a plate shape and bendable,
One end of the connecting means is locked to the locking means inside the case,
The other end of the connecting means passes through a set screw through an insertion hole formed in the connecting means, and the set screw is fixed in a screw hole formed in a screw tip of the lid body. tethering structure of the lid in an electronic device, characterized in that the screw destination body is rotating freely connected.