JP4092997B2

JP4092997B2 - Tuner device with shield case

Info

Publication number: JP4092997B2
Application number: JP2002276961A
Authority: JP
Inventors: 明仁増見; 公則中村
Original assignee: Mitsumi Electric Co Ltd
Current assignee: Mitsumi Electric Co Ltd
Priority date: 2002-09-24
Filing date: 2002-09-24
Publication date: 2008-05-28
Anticipated expiration: 2022-09-24
Also published as: JP2004119425A

Description

【０００１】
【発明の属する技術分野】
本発明は、受信機やオーディオ機器等に備えられる電子チューナ装置等のシールドケースに関する。
【０００２】
【従来の技術】
電子チューナ装置は、受信機やオーディオ機器等に備えられるが、電子部品や集積回路素子等を実装した配線基板或いは電子部品等が電磁波の影響を受けずに安定した状態で動作するようにシールドケースに内装される。シールドケースには、信号ケーブルを接続する多ピンコネクタ等が組み付けられるとともに、機器本体のパネルに取り付ける。従来のシールドケース５０は、図３及び図４に示すように金属薄板によって形成されたケース本体５１とアッパケース５２及びロアケース５３とを組み合わせて構成される。
【０００３】
シールドケース５０は、図４に示すようにケース本体５１の所定の外側面部５４が機器本体側の取付パネル５５に対する取付外側面部を構成し、取付ねじ５６により取り付けられる。シールドケース５０には、内部に電子部品や集積回路素子等を実装した配線基板が組み付けられるとともに、図示しない適宜の電子部品等が収納されている。シールドケース５０には、ケース本体５１の内部に取り付けた信号入出力用の同軸ケーブルを接続する同軸コネクタ５７及び平行フィーダ線を接続するモールドコネクタ５８が、取付外側面部５４に形成した開口孔５９或いは開口部６０を介して突出される。なお、同軸コネクタ５７及びモールドコネクタ５８は、シールドケース５０を取り付けた状態において、取付パネル５５に形成した開口部から突出される。
【０００４】
ケース本体５１は、詳細を省略するが上面部と底面部とが開放されて形成されおり、図示しないが各外側面部に押出形成された係止凸部や係止孔等の係止部が形成されている。ケース本体５１は、内部空間が図示しない仕切り板等によって適宜区切られており、この仕切り板や外側面部によって配線基板や電子部品或いは同軸コネクタ５７やモールドコネクタ５８等が収納される。ケース本体５１には、取付外側面部５４の両側に位置して取付孔６１ａ、６１ｂが形成されるとともに、上縁部の略中央位置に取付凸部６２が一体に突出形成されている。取付凸部６２には、取付孔６３が形成されている。
【０００５】
アッパケース５２は、ケース本体５１の開放上面部５１ａを閉塞するに足る外形の天井部６４と、この天井部６４の外周部に沿って一体に折曲形成された係止外周部６５とからなる。アッパケース５２は、ケース本体５１に対してその開放上面部５１ａを天井部６４により閉塞するようにして組み合わされ、係止外周部６５に形成した係止部がケース本体５１側の相対する外側面部に形成された係止部と係合することによって組合せ状態が保持される。
【０００６】
ロアケース５３も、ケース本体５１の開放底面部５１ｂを閉塞するに足る外形の底板部６６と、この底板部６６の外周部に沿って一体に折曲形成された係止外周部６７とからなる。ロアケース５３は、ケース本体５１に対してその開放底面部５１ｂを底板部６６により閉塞するようにして組み合わされ、係止外周部６７に形成した係止部がケース本体５１側の相対する外周部に形成された係止部と係合することによって組合せ状態が保持される。
【０００７】
シールドケース５０は、ケース本体５１に対してアッパケース５２とロアケース５３とが組み合わされて全体箱状に構成され、ケース本体５１の取付外側面部５４が取付パネル５５に重ね合わされる。シールドケース５０は、この状態で同軸コネクタ５７及びモールドコネクタ５８が取付パネル５５に形成した開口部から突出されるとともに、取付孔６１ａ、６１ｂ及び取付凸部６２の取付孔６３がそれぞれ取付パネル５５側に形成した取付孔６８、６９に対向される。シールドケース５０は、取付パネル５５の前方側から取付孔６８、６９に挿通された取付ねじ５６がそれぞれ取付孔６１ａ、６１ｂ及び取付孔６３にねじ込まれることによって、取付パネル５５に取り付けられる。
【特許文献】
特開２００２−２３２１８０号公報
【０００８】
【発明が解決しようとする課題】
ところで、シールドケース５０は、上述したように取付面を構成するケース本体５１の取付外側面部５４に対して、アッパケース５２側の係止外周部６５とロアケース５３側の係止外周部６７とが延在されている。また、シールドケース５０は、ケース本体５１の取付外側面部５４に、各係止外周部６５、６７が存在しない領域に取付孔６１ａ、６１ｂ、６３が形成されている。
【０００９】
シールドケース５０は、図４に示すように取付パネル５５に取り付けた状態においてこの取付パネル５５とケース本体５１の取付外側面部５４との間に各係止外周部６５、６７の厚み分の段差が構成されることによって、互いに平面接合された状態とならない。また、シールドケース５０は、上述したようにケース本体５１やアッパケース５２或いはロアケース５３が金属薄板によって形成されている。
【００１０】
したがって、シールドケース５０は、取付ねじ５６がねじ込まれて取付パネル５５に取り付けられるが、取付ねじ５６を強く締め付けた場合に、上述した段差があることでケース本体５１の取付外側面部５４が変形してしまうことがある。シールドケース５０は、取付ねじ５６を充分に締め付けることができないために不安定な状態で取り付けられることになり、衝撃や振動等が加えられた場合にショート等の発生や部品等の脱落といった不都合が発生する虞があった。
【００１１】
シールドケース５０は、例えばケース本体５１を取付ねじ５６を充分に締め付けても変形を生じさせないように厚みのある金属板によって形成するといった対応を図ることも考慮される。しかしながら、かかるシールドケース５０は、自身の重量が大きくなるとともに取付パネル５５もその重さに耐え得るに足る厚みが必要となり、装置本体の大型化、重量化を招いて実用的で無い。
【００１２】
したがって、本発明は、小型軽量化が保持されるとともに機器本体の取付部に対して強固な取り付けを可能としたシールドケースを提供することを目的としたものである。
【００１３】
【課題を解決するための手段】
上述の目的を達成する本発明にかかるチューナ装置は、金属薄板により少なくとも上面部と底面部とが開放されて形成されたケース本体と、金属薄板によりケース本体の上面部を閉塞するに足る外形の天井部と、この天井部の外周部に折曲形成された係止外周部とが一体に形成されたアッパケースと、金属薄板によりケース本体の底面部を閉塞するに足る外形の底板部と、この底板部の外周部に折曲形成された係止外周部とが一体に形成されたロアケースと、ケース本体に対してアッパケースとロアケースとが、それぞれ開放された上面部と底面部とを閉塞するとともに外側面部にそれぞれの前記係止外周部が係止されて組み合わされることによって構成され、機器本体側の取付パネルの内面に重ね合わされて、前記取付パネルに対向してねじ固定される前記ケース本体の取付外側面部を有するシールドケースを備え、取付外側面部上に係止されるアッパケースとロアケースの少なくとも一方の前記係止外周部に、前記取付外側面部上に形成された取付孔と連通される取付孔を有する第１の受け面部が一体に形成され、かつ取付外側面部の略中央部の上縁に一体的に突出形成された取付孔を有する取付凸部と重ね合わされる第２の受け面部が一体に突出形成され、第１及び第２の受け面部が取付パネル内面と取付外側面部との間に介在された状態で取付ねじがねじ込まれて、取付パネルへ取付外側面部が固定される。
【００１４】
以上のように構成された本発明にかかるシールドケースによれば、ケース体の取付外側面部に重なり合わされる少なくともアッパケースとロアケースのいずれか一方の係止外周部に形成した受け面部が機器本体の取付部に重なり合わされて機器本体の取付部と同一面となる取付部を構成し、機器本体側の取付孔と取付外側面部部の取付孔とが受け面部の取付孔を介して隙間の無い状態で連通する。したがって、シールドケースによれば、アッパケース又はロアケースの受け面部が機器本体の取付部とケース体の取付外側面部との間に介在された状態で連通された各取付孔に取付ねじがねじ込まれて取付が行われるが、取付ねじを強くねじ込んでも機器本体の取付部と同一面で固定されるケース体に変形等が生じることは無く、強固な取付が行われるようになる。
【００１５】
【発明の実施の形態】
以下、本発明の実施の形態について、図面を参照して詳細に説明する。実施の形態として示すシールドケース１は、上述した従来のシールドケース５０と基本的な構成をほぼ同様とし、図１及び図２に示すように、例えばアルミやアルミ合金等の軽量金属薄板によって形成されたケース本体２と、アッパケース３と、ロアケース４とが組み合わされてなり、例えば電子チューナを構成する。シールドケース１は、図２に示すようにケース本体２の所定の外側面部５が例えばオーディオ機器等の機器本体側の取付パネル６に対する取付外側面部を構成し、複数個の取付ねじ７によりねじ止めされて取り付けられる。
【００１６】
シールドケース１には、図示しないが内部に電子部品や集積回路素子等を実装した配線基板が組み付けられるとともに、適宜の電子部品等が収納されている。シールドケース１には、取付外側面部５に信号入出力用の同軸ケーブルを接続する同軸コネクタ８と平行フィーダ線を接続するモールドコネクタ９とが組み付けられている。なお、これら同軸コネクタ８とモールドコネクタ９は、後述するようにシールドケース１を取付パネル６に取り付けた状態において、この取付パネル６に形成した開口部からそれぞれ突出される。
【００１７】
ケース本体２は、詳細を省略するが上面部と底面部とが開放された枠体を呈して形成されおり、図示しないが各外側面部に押出形成された係止凸部や係止孔等の係止部が形成されている。ケース本体２は、内部空間が図示しない仕切り板等によって適宜区切られており、この仕切り板や外側面部によって配線基板や電子部品等が収納されるとともに同軸コネクタ８やモールドコネクタ９等が取り付けられている。勿論、ケース本体２は、枠体形状に限定されるものではないが、内部に部品を実装するために適宜開口部が設けられている。
【００１８】
ケース本体２には、取付外側面部５の長手方向の両側に位置して第１の取付孔１０と第２の取付孔１１とが形成されるとともに、上縁部の略中央位置に取付凸部１２が一体に突出形成されている。取付凸部１２には、第３の取付孔１３が形成されている。なお、ケース本体２は、図示を省略するが各取付孔１０、１１、１３の軸長を確保するように、内部に突出するようにしてバーリング加工が施されている。
【００１９】
アッパケース３は、ケース本体２の開放上面部２ａを閉塞するに足る外形の天井部１４と、ケース本体２の両外側面部及び背面部に対応する天井部１４の外周部に沿って一体に折曲形成された係止外周部１５と、ケース本体２の取付外側面部５に対応する天井部１４の外周部に沿って一体に折曲形成された係止前面部１６とからなる。各係止外周部１５は、詳細を省略するが例えば多数個の短冊片からなり、ケース本体２側の係合部に対応する長さを有して先端部に係合凸部が一体に形成されている。
【００２０】
係止前面部１６は、図１に示すように同軸コネクタ８やモールドコネクタ９にかからない高さを有しているが、取付外側面部５側の第１の取付孔１０に対応して側方の一部が延長されて第１の受け面部１７が一体に形成されている。第１の受け面部１７には、後述するようにアッパケース３をケース本体２に組み付けた状態において第１の取付孔１０と連通する第１の取付孔１８が形成されている。また、係止前面部１６には、ケース本体２側の取付凸部１２に対応して、長さ方向の略中央部の上縁に第２の受け面部１９が形成されている。第２の受け面部１９には、アッパケース３をケース本体２に組み付けた状態において取付凸部１２に形成した第３の取付孔１３と連通する第２の取付孔２０が形成されている。
【００２１】
以上のように構成されたアッパケース３は、ケース本体２に対してその開放上面部２ａを天井部１４により閉塞するようにして組み合わされ、両外側面部及び背面部に重なり合わされた係止外周部１５の各係止部がケース本体２側の相対する各係止部と係合して組合せ状態が保持される。また、アッパケース３は、この状態で係止前面部１６がケース本体２側の取付外側面部５の前面に重なり合わされるとともに、第２の受け面部１９が取付凸部１２の前面に重なり合わされる。アッパケース３は、この状態でケース本体２側の第１の取付孔１０に対して第１の取付孔１８が連通されるとともに、取付凸部１２側の第３の取付孔１３に対して第２の取付孔２０が連通される。
【００２２】
ロアケース４も、ケース本体２の開放底面部２ｂを閉塞するに足る外形の底板部２１と、ケース本体２の両外側面部及び背面部に対応する底板部２１の外周部に沿って一体に折曲形成された係止外周部２２と、ケース本体２の取付外側面部５に対応する底板部２１の外周部に沿って一体に折曲形成された係止前面部２３とからなる。各係止外周部２２も、詳細を省略するが例えば多数個の短冊片からなり、ケース本体２側の係合部に対応する長さを有して先端部に係合凸部が一体に形成されている。
【００２３】
係止前面部２３は、図１に示すように同軸コネクタ８やモールドコネクタ９にかからない高さを有しているが、取付外側面部５側の第２の取付孔１１に対応して側方の一部が延長されて第３の受け面部２４が一体に形成されている。第３の受け面部２４には、後述するようにアッパケース３をケース本体２に組み付けた状態において第２の取付孔１０と連通する第３の取付孔２５が形成されている。第３の受け面部２４は、アッパケース３側の第１の受け面部１７と略同一形状を呈するとともに、左右対称位置に形成されている。
【００２４】
以上のように構成されたロアケース４は、ケース本体２に対してその開放底面部２ｂを底板部２１により閉塞するようにして組み合わされ、両外側面部及び背面部に重なり合わされた係止外周部２２の各係止部がケース本体２側の相対する各係止部と係合して組合せ状態が保持される。また、ロアケース４は、この状態で係止前面部２３がケース本体２側の取付外側面部５の前面に重なり合わされてケース本体２側の第２の取付孔１１に対して第３の取付孔２５が連通される。
【００２５】
シールドケース１は、上述したケース本体２に対してそれぞれアッパケース３とロアケース４とが組み合わされて全体箱状に構成され、ケース本体２の取付外側面部５が取付パネル６の内面に重ね合わされる。シールドケース１は、この状態で同軸コネクタ８及びモールドコネクタ９が取付パネル６に形成した開口部から突出される。シールドケース１は、ケース本体２の取付外側面部５に、上述したようにアッパケース３の係止前面部１６とロアケース４の係止前面部２３がそれぞれ重なり合わされた状態となっている。
【００２６】
シールドケース１は、取付外側面部５の第１の取付孔１０とアッパケース３の第１の受け面部１７に形成した第１の取付孔１８とが連通するとともに、取付凸部１２の第３の取付孔１３と第２の受け面部１９に形成した第２の取付孔２０とが連通された状態にある。シールドケース１は、取付外側面部５の第２の取付孔１１とロアケース４の第３の受け面部２４に形成した第３の取付孔２５とが連通した状態にある。シールドケース１は、ケース本体２の取付外側面部５を取付パネル６の内面に重ね合わせた状態で、第１の取付孔１０と第２の取付孔１１及び第３の取付孔１３がそれぞれ取付パネル６に形成した第１の取付孔２６乃至第３の取付孔２８（但し、第３の取付孔２８は図示されていない。）と連通される。
【００２７】
シールドケース１は、この状態で取付パネル６の前面側から第１の取付孔２６乃至第３の取付孔２８にそれぞれ取付ねじ７がねじ込まれることによって、取付パネル６に固定される。シールドケース１は、上述したように取付ねじ７によるねじ止め位置においてケース本体２の取付外側面部５の前面に、アッパケース３側の第１の受け面部１７と第２の受け面部１９とが重なり合わされるとともに、ロアケース４側の第３の受け面部２４が重なり合わされている。シールドケース１は、取付パネル６の第１の取付孔２６乃至第３の取付孔２８に対して取付外側面部５側の各取付孔１０、１１、１３が隙間の無い状態で連通される。
【００２８】
シールドケース１は、かかる構成により第１の受け面部１７、第２の受け面部１９及び第３の受け面部２４を介して取付面が実質的に同一面を構成して取付パネル６に対してねじ止め固定されることになる。したがって、シールドケース１は、取付ねじ７を強くねじ込んでもケース本体２の取付外側面部５に変形を生じることは無く、取付パネル６に対して強固に固定される。シールドケース１は、機器本体に衝撃や振動等が加えられた場合でもショート等の発生や部品等の脱落といった不都合が防止される。
【００２９】
シールドケース１は、上述したようにケース本体２の取付外側面部５に、互いに同一形状に形成されたアッパケース３側の第１の受け面部１７とロアケース４側の第３の受け面部２４とが中心に対して対称の側方に位置してそれぞれ重なり合わされている。したがって、シールドケース１は、取付ねじ７がねじ込まれて取付パネル６に固定される際に、ケース本体２に対するアッパケース３とロアケース４の組合せ状態が安定に保持されてシールド作用が損なわれるといった不都合の発生が防止される。
【００３０】
なお、上述したシールドケース１は、ケース本体２の取付外側面部５に同軸コネクタ８やモールドコネクタ９を設けた電子チューナの適用例を示したが、各種のシールドケースに適用されることは勿論である。シールドケース１は、ケース本体２の取付外側面部５に対してアッパケース３とロアケース４に一体に形成した第１の受け面部１７と第２の受け面部１９及び第３の受け面部２４とを重ね合わせるように構成したが、例えばケース本体２が底面部も一体化された構造である場合には、アッパケース３にのみ受け面部が形成される。
【００３１】
【発明の効果】
以上詳細に説明したように、本発明にかかるシールドケースによれば、ケース体の取付外側面部に重なり合わされる少なくともアッパケースとロアケースのいずれか一方の係止外周部に機器本体の取付部に重なり合わされてその取付部と同一面となる取付部を構成する受け面部が形成されることにより、取付ねじを強くねじ込んでも機器本体の取付部と同一面で固定されるケース体に変形等が生じることは無く、強固な取付が行われるようになる。
【図面の簡単な説明】
【図１】本発明の実施の形態として示すシールドケースの要部正面図である。
【図２】同シールドケースの要部縦断面図である。
【図３】従来のシールドケースの要部正面図である。
【図４】同シールドケースの要部縦断面図である。
【符号の説明】
１シールドケース
２ケース本体
３アッパケース
４ロアケース
５取付外側面部
６取付パネル
７取付ねじ
１０第１の取付孔
１１第２の取付孔
１２取付凸部
１３第３の取付孔
１４天井部
１５係止外周部
１６係止前面部
１７第１の受け面部
１８第１の取付孔
１９第２の受け面部
２０第２の取付孔
２１底板部
２２係止外周部
２３係止前面部
２４第２の受け面部
２５第３の取付孔[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shield case such as an electronic tuner device provided in a receiver, an audio device, or the like.
[0002]
[Prior art]
Electronic tuner devices are installed in receivers, audio equipment, etc., but shield cases are used so that wiring boards or electronic components mounted with electronic components, integrated circuit elements, etc. operate stably without being affected by electromagnetic waves. Decorated in. The shield case is assembled with a multi-pin connector or the like for connecting a signal cable, and is attached to the panel of the device body. As shown in FIGS. 3 and 4, the conventional shield case 50 is configured by combining a case main body 51 formed of a thin metal plate, an upper case 52, and a lower case 53.
[0003]
As shown in FIG. 4, the shield case 50 has a predetermined outer surface portion 54 of the case main body 51 constituting an attachment outer surface portion with respect to the attachment panel 55 on the device main body side, and is attached by an attachment screw 56. In the shield case 50, a wiring board on which electronic components, integrated circuit elements, and the like are mounted is assembled, and appropriate electronic components (not shown) are accommodated. In the shield case 50, a coaxial connector 57 for connecting a signal input / output coaxial cable attached to the inside of the case main body 51 and a mold connector 58 for connecting a parallel feeder line are formed in an opening hole 59 formed in the attachment outer surface portion 54 or It protrudes through the opening 60. The coaxial connector 57 and the molded connector 58 protrude from an opening formed in the attachment panel 55 in a state where the shield case 50 is attached.
[0004]
Although the details are omitted, the case main body 51 is formed by opening the upper surface portion and the bottom surface portion, and although not shown, a locking protrusion such as a locking protrusion or a locking hole formed on each outer surface portion is formed. Has been. In the case body 51, the internal space is appropriately divided by a partition plate or the like (not shown), and the wiring board, the electronic component, the coaxial connector 57, the molded connector 58, and the like are accommodated by the partition plate and the outer surface portion. Mounting holes 61a and 61b are formed on the case body 51 on both sides of the mounting outer surface portion 54, and mounting protrusions 62 are integrally formed at substantially the center position of the upper edge portion. A mounting hole 63 is formed in the mounting convex portion 62.
[0005]
The upper case 52 includes a ceiling portion 64 having an outer shape sufficient to close the open upper surface portion 51 a of the case main body 51, and a locking outer peripheral portion 65 that is integrally bent along the outer peripheral portion of the ceiling portion 64. . The upper case 52 is combined with the case main body 51 so that the open upper surface portion 51a is closed by the ceiling portion 64, and the locking portion formed on the locking outer peripheral portion 65 is the outer surface portion facing the case main body 51 side. The combined state is maintained by engaging with the locking portion formed in the.
[0006]
The lower case 53 also includes a bottom plate portion 66 having an outer shape sufficient to close the open bottom surface portion 51 b of the case main body 51, and a locking outer peripheral portion 67 that is integrally bent along the outer peripheral portion of the bottom plate portion 66. The lower case 53 is combined with the case main body 51 so that the open bottom surface portion 51b is closed by the bottom plate portion 66, and the engaging portion formed on the engaging outer peripheral portion 67 is formed on the outer peripheral portion facing the case main body 51 side. The combined state is maintained by engaging with the formed locking portion.
[0007]
The shield case 50 is configured as a whole box by combining an upper case 52 and a lower case 53 with respect to the case body 51, and the mounting outer surface portion 54 of the case body 51 is superimposed on the mounting panel 55. In this state, the shield case 50 protrudes from the opening where the coaxial connector 57 and the molded connector 58 are formed in the mounting panel 55, and the mounting holes 61 a and 61 b and the mounting holes 63 of the mounting projections 62 are on the mounting panel 55 side. It faces the mounting holes 68 and 69 formed in the above. The shield case 50 is attached to the attachment panel 55 by screwing attachment screws 56 inserted into the attachment holes 68 and 69 from the front side of the attachment panel 55 into the attachment holes 61a and 61b and the attachment hole 63, respectively.
[Patent Literature]
Japanese Patent Laid-Open No. 2002-232180
[Problems to be solved by the invention]
By the way, the shield case 50 has a locking outer peripheral portion 65 on the upper case 52 side and a locking outer peripheral portion 67 on the lower case 53 side with respect to the mounting outer surface portion 54 of the case body 51 constituting the mounting surface as described above. Has been extended. Further, the shield case 50 has attachment holes 61 a, 61 b, 63 formed in a region where the engagement outer peripheral portions 65, 67 do not exist in the attachment outer surface portion 54 of the case body 51.
[0009]
When the shield case 50 is attached to the attachment panel 55 as shown in FIG. 4, there are steps corresponding to the thicknesses of the locking outer peripheral portions 65 and 67 between the attachment panel 55 and the attachment outer surface portion 54 of the case body 51. By being configured, they are not plane bonded to each other. In the shield case 50, the case body 51, the upper case 52, or the lower case 53 is formed of a thin metal plate as described above.
[0010]
Therefore, the shield case 50 is attached to the attachment panel 55 with the attachment screw 56 screwed in. However, when the attachment screw 56 is strongly tightened, the attachment outer surface portion 54 of the case body 51 is deformed due to the above-described step. May end up. The shield case 50 is attached in an unstable state because the mounting screw 56 cannot be sufficiently tightened, and there is a problem that a short circuit occurs or parts are dropped when an impact or vibration is applied. There was a risk of occurrence.
[0011]
For example, it is considered that the shield case 50 is formed of a thick metal plate so that the case body 51 is not deformed even if the mounting screw 56 is sufficiently tightened. However, such a shield case 50 is not practical because the weight of the shield case 50 increases and the mounting panel 55 needs to be thick enough to withstand the weight. This increases the size and weight of the apparatus body.
[0012]
Accordingly, an object of the present invention is to provide a shield case that can be reduced in size and weight and can be firmly attached to the attachment portion of the apparatus main body.
[0013]
[Means for Solving the Problems]
A tuner device according to the present invention that achieves the above-mentioned object has a case main body formed by opening at least an upper surface portion and a bottom surface portion with a metal thin plate, and an outer shape sufficient to close the upper surface portion of the case main body with the metal thin plate. An upper case integrally formed with a ceiling part and a latching outer peripheral part bent at the outer peripheral part of the ceiling part, and a bottom plate part having an outer shape sufficient to close the bottom part of the case body with a thin metal plate; The lower case formed integrally with the outer peripheral part of the bent bent outer periphery of the bottom plate part, and the upper case and the lower case with respect to the case main body close the opened upper surface part and bottom surface part, respectively. In addition, each of the locking outer peripheral portions is locked to and combined with the outer surface portion, and is superimposed on the inner surface of the mounting panel on the device body side so as to face the mounting panel. A shield case having a mounting outer surface portion of the case body to be fixed is provided, and is formed on the mounting outer surface portion in at least one of the locking outer peripheral portions of the upper case and the lower case locked on the mounting outer surface portion. A first receiving surface portion having a mounting hole communicated with the mounting hole is integrally formed, and is overlapped with a mounting convex portion having a mounting hole integrally protruding at the upper edge of a substantially central portion of the mounting outer surface portion. The second receiving surface portion is integrally formed to project, and the mounting screw is screwed in the state where the first and second receiving surface portions are interposed between the inner surface of the mounting panel and the outer surface of the mounting panel. The face part is fixed.
[0014]
According to the shield case according to the present invention configured as described above, the receiving surface portion formed on at least one of the locking outer peripheral portions of the upper case and the lower case, which overlaps the mounting outer surface portion of the case body, is the A mounting portion that is overlapped with the mounting portion and is flush with the mounting portion of the device main body is configured, and there is no gap between the mounting hole on the device main body side and the mounting hole on the mounting outer surface portion via the mounting hole on the receiving surface portion Communicate with Therefore, according to the shield case, a mounting screw is screwed into each mounting hole communicated in a state where the receiving surface portion of the upper case or the lower case is interposed between the mounting portion of the device body and the mounting outer surface portion of the case body. Although the attachment is performed, even if the attachment screw is screwed in strongly, the case body fixed on the same surface as the attachment portion of the device main body is not deformed, and the strong attachment is performed.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The shield case 1 shown as an embodiment has substantially the same basic configuration as the conventional shield case 50 described above, and is formed of a lightweight metal thin plate such as aluminum or aluminum alloy as shown in FIGS. The case main body 2, the upper case 3, and the lower case 4 are combined to constitute, for example, an electronic tuner. In the shield case 1, as shown in FIG. 2, a predetermined outer surface portion 5 of the case body 2 constitutes an attachment outer surface portion for the attachment panel 6 on the device body side such as an audio device, and is screwed by a plurality of attachment screws 7. Attached.
[0016]
Although not shown, the shield case 1 is assembled with a wiring board on which electronic components, integrated circuit elements, and the like are mounted, and appropriate electronic components are accommodated. The shield case 1 is assembled with a coaxial connector 8 for connecting a signal input / output coaxial cable and a molded connector 9 for connecting a parallel feeder line to the mounting outer surface portion 5. The coaxial connector 8 and the molded connector 9 protrude from the opening formed in the attachment panel 6 in a state where the shield case 1 is attached to the attachment panel 6 as described later.
[0017]
Although the details are omitted, the case main body 2 is formed to have a frame body in which the upper surface portion and the bottom surface portion are opened. A locking portion is formed. The case body 2 has an internal space appropriately divided by a partition plate or the like (not shown). A wiring board, an electronic component, and the like are accommodated by the partition plate and the outer surface portion, and a coaxial connector 8 and a mold connector 9 are attached. Yes. Of course, the case body 2 is not limited to the shape of the frame, but an opening is provided as appropriate for mounting components inside.
[0018]
The case body 2 is formed with a first attachment hole 10 and a second attachment hole 11 located on both sides of the attachment outer surface portion 5 in the longitudinal direction, and an attachment protrusion at a substantially central position of the upper edge portion. 12 is integrally formed to project. A third mounting hole 13 is formed in the mounting convex portion 12. Although not shown, the case body 2 is subjected to burring so as to protrude inward so as to ensure the axial length of each of the mounting holes 10, 11, 13.
[0019]
The upper case 3 is integrally folded along the outer peripheral portion of the ceiling portion 14 corresponding to the outer side surface and the rear surface portion of the case main body 2 and the ceiling portion 14 having an outer shape sufficient to close the open upper surface portion 2a of the case main body 2. The locking outer peripheral portion 15 is formed with a bend, and the locking front portion 16 is integrally bent along the outer peripheral portion of the ceiling portion 14 corresponding to the mounting outer surface portion 5 of the case body 2. Although details are omitted, each locking outer peripheral portion 15 is composed of, for example, a large number of strip pieces, and has a length corresponding to the engaging portion on the case body 2 side, and an engaging convex portion is integrally formed at the tip portion. Has been.
[0020]
As shown in FIG. 1, the locking front surface portion 16 has a height that does not cover the coaxial connector 8 or the molded connector 9, but corresponds to the first mounting hole 10 on the mounting outer surface portion 5 side. A part of the first receiving surface portion 17 is integrally formed by extending. The first receiving surface portion 17 is formed with a first attachment hole 18 that communicates with the first attachment hole 10 in a state where the upper case 3 is assembled to the case body 2 as will be described later. In addition, a second receiving surface portion 19 is formed at the upper edge of the substantially central portion in the length direction of the locking front surface portion 16 in correspondence with the mounting convex portion 12 on the case body 2 side. The second receiving surface 19 is formed with a second mounting hole 20 communicating with the third mounting hole 13 formed in the mounting convex portion 12 in a state where the upper case 3 is assembled to the case body 2.
[0021]
The upper case 3 configured as described above is combined with the case main body 2 so that the open upper surface portion 2a is closed by the ceiling portion 14, and the outer peripheral portion is overlapped with both the outer surface portion and the back surface portion. Each of the 15 locking portions engages with each of the opposing locking portions on the case body 2 side, and the combined state is maintained. Further, in this state, the upper case 3 is overlapped with the front surface of the mounting outer surface portion 5 on the case body 2 side, and the second receiving surface portion 19 is overlapped with the front surface of the mounting convex portion 12. . In this state, the upper case 3 communicates with the first mounting hole 18 on the case body 2 side and communicates with the third mounting hole 13 on the mounting convex portion 12 side. Two mounting holes 20 are communicated.
[0022]
The lower case 4 is also bent integrally along the outer peripheral portion of the bottom plate portion 21 having an outer shape sufficient to close the open bottom surface portion 2b of the case main body 2 and both the outer side surface portion and the back surface portion of the case main body 2. The locking outer peripheral portion 22 is formed, and the locking front surface portion 23 is integrally bent along the outer peripheral portion of the bottom plate portion 21 corresponding to the mounting outer surface portion 5 of the case body 2. Each locking outer peripheral portion 22 also has a length corresponding to the engaging portion on the case main body 2 side, and an engaging convex portion is integrally formed at the tip portion, although details are omitted, for example, although details are omitted. Has been.
[0023]
As shown in FIG. 1, the locking front surface portion 23 has a height that does not cover the coaxial connector 8 or the molded connector 9, but corresponds to the second mounting hole 11 on the mounting outer surface portion 5 side. A part of the third receiving surface portion 24 is integrally formed to be extended. The third receiving surface portion 24 is formed with a third mounting hole 25 that communicates with the second mounting hole 10 in a state where the upper case 3 is assembled to the case body 2 as will be described later. The third receiving surface portion 24 has substantially the same shape as the first receiving surface portion 17 on the upper case 3 side, and is formed at a symmetrical position.
[0024]
The lower case 4 configured as described above is combined with the case main body 2 so that the open bottom surface portion 2b is closed by the bottom plate portion 21, and the outer peripheral surface portion 22 is overlapped with the outer surface portion and the back surface portion. The respective engaging portions engage with the respective engaging portions on the case main body 2 side, and the combined state is maintained. In this state, the lower case 4 is overlapped with the front surface of the attachment outer surface portion 5 on the case body 2 side in this state, so that the third attachment hole 25 with respect to the second attachment hole 11 on the case body 2 side. Is communicated.
[0025]
The shield case 1 is configured as an overall box by combining the upper case 3 and the lower case 4 with respect to the case body 2 described above, and the mounting outer surface portion 5 of the case body 2 is superimposed on the inner surface of the mounting panel 6. . In this state, the shield case 1 protrudes from the opening formed in the mounting panel 6 by the coaxial connector 8 and the molded connector 9. The shield case 1 is in a state in which the locking front surface portion 16 of the upper case 3 and the locking front surface portion 23 of the lower case 4 overlap each other on the attachment outer surface portion 5 of the case body 2 as described above.
[0026]
In the shield case 1, the first mounting hole 10 of the mounting outer surface portion 5 communicates with the first mounting hole 18 formed in the first receiving surface portion 17 of the upper case 3, and the third mounting projection 12 The mounting hole 13 and the second mounting hole 20 formed in the second receiving surface portion 19 are in communication with each other. The shield case 1 is in a state where the second mounting hole 11 of the mounting outer surface portion 5 and the third mounting hole 25 formed in the third receiving surface portion 24 of the lower case 4 communicate with each other. The shield case 1 has a first mounting hole 10, a second mounting hole 11, and a third mounting hole 13 in a state where the mounting outer surface portion 5 of the case body 2 is superimposed on the inner surface of the mounting panel 6. 6 are communicated with first to third mounting holes 26 to 28 (however, the third mounting hole 28 is not shown).
[0027]
In this state, the shield case 1 is fixed to the mounting panel 6 by screwing the mounting screws 7 into the first mounting hole 26 to the third mounting hole 28 from the front side of the mounting panel 6. In the shield case 1, the first receiving surface portion 17 and the second receiving surface portion 19 on the upper case 3 side overlap the front surface of the mounting outer surface portion 5 of the case body 2 at the screwing position by the mounting screw 7 as described above. In addition, the third receiving surface portion 24 on the lower case 4 side is overlapped. In the shield case 1, the mounting holes 10, 11, 13 on the mounting outer surface 5 side are communicated with the first mounting hole 26 to the third mounting hole 28 of the mounting panel 6 with no gap.
[0028]
With this configuration, the shield case 1 has a mounting surface that is substantially the same surface via the first receiving surface portion 17, the second receiving surface portion 19, and the third receiving surface portion 24. It will be fixed. Therefore, the shield case 1 is firmly fixed to the attachment panel 6 without deformation of the attachment outer surface portion 5 of the case body 2 even if the attachment screw 7 is screwed in strongly. The shield case 1 prevents inconveniences such as occurrence of a short circuit and dropping of parts even when an impact or vibration is applied to the device body.
[0029]
As described above, the shield case 1 has the first receiving surface portion 17 on the upper case 3 side and the third receiving surface portion 24 on the lower case 4 side, which are formed in the same shape on the mounting outer surface portion 5 of the case body 2. It is located on the side symmetrical with respect to the center and overlapped. Therefore, the shield case 1 has a disadvantage that when the mounting screw 7 is screwed and fixed to the mounting panel 6, the combined state of the upper case 3 and the lower case 4 with respect to the case body 2 is stably maintained and the shielding action is impaired. Is prevented from occurring.
[0030]
In addition, although the shield case 1 mentioned above showed the application example of the electronic tuner which provided the coaxial connector 8 and the molded connector 9 in the attachment outer side surface part 5 of the case main body 2, it is needless to say that it is applied to various shield cases. is there. In the shield case 1, a first receiving surface portion 17, a second receiving surface portion 19, and a third receiving surface portion 24 that are integrally formed with the upper case 3 and the lower case 4 are overlapped with the mounting outer surface portion 5 of the case body 2. For example, when the case body 2 has a structure in which the bottom surface portion is also integrated, the receiving surface portion is formed only in the upper case 3.
[0031]
【The invention's effect】
As described in detail above, according to the shield case according to the present invention, at least one of the upper outer case and the lower case that overlaps the outer outer surface of the case body is overlapped with the mounting portion of the device body. By forming a receiving surface portion that forms a mounting portion that is the same surface as the mounting portion, deformation or the like occurs in the case body that is fixed on the same surface as the mounting portion of the device body even if the mounting screw is strongly screwed in. There will be no strong attachment.
[Brief description of the drawings]
FIG. 1 is a front view of a main part of a shield case shown as an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of a main part of the shield case.
FIG. 3 is a front view of a main part of a conventional shield case.
FIG. 4 is a longitudinal sectional view of a main part of the shield case.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shield case 2 Case main body 3 Upper case 4 Lower case 5 Mounting outer surface part 6 Mounting panel 7 Mounting screw 10 1st mounting hole 11 2nd mounting hole 12 Mounting convex part 13 Third mounting hole 14 Ceiling part 15 Locking outer periphery Part 16 Locking front surface part 17 First receiving surface part 18 First mounting hole 19 Second receiving surface part 20 Second mounting hole 21 Bottom plate part 22 Locking outer peripheral part 23 Locking front surface part 24 Second receiving surface part 25 Third mounting hole

Claims

A case body formed by opening at least a top surface portion and a bottom surface portion with a metal thin plate;
An upper case integrally formed with a ceiling portion having an outer shape sufficient to close the upper surface portion of the case body with a thin metal plate, and a locking outer peripheral portion formed by bending on the outer peripheral portion of the ceiling portion;
A lower case in which a bottom plate portion having an outer shape sufficient to close the bottom surface portion of the case main body with a thin metal plate and a locking outer peripheral portion formed on the outer peripheral portion of the bottom plate portion are integrally formed;
The upper case and the lower case with respect to the case main body are configured such that the upper surface portion and the bottom surface portion that are opened are closed and the outer peripheral surface portions are locked and combined with the outer peripheral portion. ,
Overlaid on the inner surface of the mounting panel on the device body side, and includes a shield case having an outer mounting surface portion of the case body that is fixed to the mounting panel with screws.
A first receptacle having a mounting hole communicating with a mounting hole formed on the mounting outer surface portion in at least one of the locking outer peripheral portions of the upper case and the lower case locked on the mounting outer surface portion. A second receiving surface portion that is formed integrally with the mounting convex portion having a mounting hole formed integrally with the upper surface edge of the mounting outer surface portion and having a mounting hole that is integrally protruding and formed on the upper edge of the mounting outer surface portion,
And mounting screw is screwed in interposed state between the first and second retaining surface is the inner surface of the panel Mounting the and said mounting outer surface portion, said mounting outer surface portion to the mounting panel is fixed Characteristic tuner device .

2. The tuner device according to claim 1, wherein the receiving surface portion is formed in the upper case and the lower case at lateral positions substantially symmetrical with respect to the center of the mounting outer surface portion.