JP3769460B2

JP3769460B2 - In-vehicle electronic control unit housing

Info

Publication number: JP3769460B2
Application number: JP2000324864A
Authority: JP
Inventors: 功安積; 哲司渡辺
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2000-10-25
Filing date: 2000-10-25
Publication date: 2006-04-26
Anticipated expiration: 2020-10-25
Also published as: JP2002134963A

Description

【０００１】
【発明の属する技術分野】
この発明は、例えばエンジン制御装置等の車載電子制御装置において、プリント基板等を収納する筐体の構造に関するものである。
【０００２】
【従来の技術】
量産製造される車載電子制御装置において、プリント基板の収納ケ−スに求められる主な要件としては、簡易な金型構造を用いて製造できかつ組立性に優れ、さらに車両振動等に耐えることが挙げられる。
また、収納されるプリント基板のサイズの変化や、種々の車種に対応した様々な取付け仕様に対応できることが収納ケ−スを標準化するうえで重要である。
従来の電子制御装置の筐体構造に関しては、例えば特開平１１−２８９１７８号公報や、特開平１１−２８４３７５号公報などに開示されているものがあり、いずれもプリント基板収納ケ−スとカバ−部材とから構成され、各種サイズのプリント基板を一種類のケ−スに収納できる構造を有している。
【０００３】
【発明が解決しようとする課題】
昨今の車載電子制御装置は、極限的な高集積化・小型化が図られており、制御仕様の変更によるプリント基板サイズの変化は僅少であるが、むしろ様々な取付け仕様に対する自由度を確保することが重要となっている。
従来の電子制御装置の筐体は以上のように構成されており、一種類のケースで各種サイズのプリント基板に対応できるよう構成されているが、電子制御装置の取付け構造およびその標準化に関しては論及されておらず、車種の変更に伴う取付け仕様の変更によって筐体の再設計および製造が必要となり、時間およびコストを費やさなければならないという問題があった。
【０００４】
この発明は、前記のような問題を解消するためになされたもので、簡易な金型構造を用いて製造できかつ組立性に優れ、さらに車両振動に耐えることができると共に、種々の車種に対して車載電子制御装置を取付けることができる取付け自由度の高い筐体を提供することを目的とする。
【０００５】
【課題を解決するための手段】
この発明に係わる車載電子制御装置の筐体は、電子部品が実装されたプリント基板等を挿入するための開口部を一側面に有する矩形筒状のケースと、前記ケースの内面に設けられ、前記ケースに挿入される前記プリント基板を所定の位置に案内する棚部および漏斗形状部と、前記ケースの開口部と対向する底面部内側に設けられ、挿入された前記プリント基板の端部を挟持して保持する一対もしくは複数対の矩形状突起部と、前記プリント基板に装着され前記ケースの開口部のカバーを兼ねるコネクタハウジングと、前記ケースの外面に取付けられ車体に固定される取付足とを備えた車載電子制御装置の筐体であって、前記ケースと前記コネクタハウジングとは、前記ケースの開口部近傍に設けられた矩形状孔部からなる第一係止部と、前記コネクタハウジングに設けられた矩形状突起部からなる第二係止部とを嵌合させることにより固定され、前記ケースの開口部は、自然状態では弧状に変形しており、前記開口部に前記コネクタハウジングを挿入することにより前記開口部の変形を矯正し、前記第一係止部と前記第二係止部との嵌合を強化する機能を有するようにしたものである。
【０００６】
また、この発明に係わる車載電子制御装置の筐体は、前記ケース内面に設けられた棚部が、前記ケースの両内側面に開口部近傍から底面部に至るほぼ全面に設けられ、前記ケースに挿入されるプリント基板の両端部を支持すると共に、前記プリント基板に実装された各種電子部品がケースに接触しないように配置するようにしたものである。
【０００７】
また、この発明に係わる車載電子制御装置の筐体は、前記ケース内面に設けられた漏斗形状部が、前記ケースの側面部と底面部との各コーナー部の上部に設けられ、前記ケースに挿入されるプリント基板を底面部に設けられた対を成す矩形状突起部の間に誘導するように配置ものである。
【０００８】
また、この発明に係わる車載電子制御装置の筐体は、前記ケースの底面部内側に設けられた対を成す矩形状突起部が、微細山形形状部を有し、前記ケースに挿入されるプリント基板を前記微細山形形状部を押しつぶしながら前記矩形状突起部の間に嵌入することにより、前記プリント基板の端部を挟持して固定するように構成ものである。
【０００９】
更に、この発明に係わる車載電子制御装置の筐体は、前記取付足が、前記ケースの両外側面に形成された係合突起部と係合する係合孔および車体に取付けるための折曲部を有し、前記ケースの両外側面に各々設けられた対を成すＬ字形突起部をガイド溝として挿入され、前記ケースの係合突起部と前記取付足の係合孔を係合させることにより前記ケースの外面に前記取付足を固定するように構成されたものである。
【００１０】
【発明の実施の形態】
実施の形態１．
以下、この発明の一実施の形態である車載電子制御装置の筐体を図について説明する。図１はこの発明の実施の形態１による車載電子制御装置の筐体の構造を説明するための図で、（ａ）は筐体のケース部分を示す断面図、（ｂ）はケースの一部分の詳細図、（ｃ）はケースに挿入されるプリント基板およびこれに装着されたコネクタハウジング部分を示す断面図である。図２は図１( ａ) に示すケースの外観図、図３は図１（ａ）に示すケースの下面側から見た側面図である。
図４は本実施の形態による車載電子制御装置の筐体を本体に取り付けるための取付足を示す図、図５は本実施の形態による車載電子制御装置を示す正面外観図である。
【００１１】
図１（ａ）および図２において、１は例えばＰＢＴ（ポリブチレン・テレフタレ−ト）樹脂を用いて成形された矩形筒状のケ−スで、一側面に開口部２を有している。１ａはケ−ス１の上面部、１ｂはケース１の下面部、１ｃ、１ｄはケ−ス１の開口部２に向かって左側面部と右側面部、１ｅはケ−ス１の底面部（開口部２と対向する面）である。
なお、図２に示すように、ケ−ス１の開口部２の開口高さＨは、ケース１の上面部１ａおよび下面部１ｂが弧状に変形するため、左右の高さＨb に比べて中心部の高さＨａが小さくなっている。
３はケース１の左側面部１ｃと右側面部１ｄの内側下方に設けられ、ケース１に挿入される後述するプリント基板２０の両端部を支持する棚部で、開口部２側に斜面部３ａを有する。なお、棚部３はケース１成形時に用いる金型の抜き勾配を考慮して充分な傾斜角度（開口部２側が低く、奥が高い）を有している。
４はケース１の左側面部１ｃおよび右側面部１ｄと底面部１ｅの各コーナー部の内側上部に設けられ、ケース１に挿入される後述するプリント基板２０の底面部１ｅ側のガイド部となる漏斗形状部である。
【００１２】
５は図１（ｂ）に記載する詳細図の領域を示している。
６ａと７ａはケ−ス１の底面部１ｅの内側左下部に設けられた対を成す矩形状突起部で、６ａは左下側矩形状突起部、７ａは左上側矩形状突起部である。６ｂと７ｂはケ−ス１の底面部１ｅの内側右下部に設けられた他の一対の矩形状突起部で、６ｂは右下側矩形状突起部、７ｂは右上側矩形状突起部である。８は左下側および右下側矩形状突起部６ａ、６ｂに設けられた微細山形形状部である。
なお、漏斗形状部４、二対の矩形状突起部６ａと７ａおよび６ｂと７ｂ、微細山形形状部８は、ケース１に挿入されるプリント基板２０を漏斗形状部４により矩形状突起部６ａと７ａおよび６ｂと７ｂの間に誘導し、微細山形形状部８の山部を押しつぶしながら矩形状突起部６ａと７ａおよび６ｂと７ｂの間に嵌入することにより、プリント基板２０の端部を挟持するように構成されている。
９ａ、９ｂ、９ｃ、９ｄはケ−ス１の開口部２近傍の上面部１ａと下面部１ｂに二個ずつ設けられた矩形状孔部で、９ａは左上第一係止部、９ｂは右上第一係止部、９ｃは左下第一係止部、９ｄは右下第一係止部である。
【００１３】
また、図１（ｃ）において、２０は例えばガラスエポキシ材を用いて形成されたプリント基板で、下面には薄型電子部品２１、上面には厚型電子部品２２や薄型電子部品２１等の各種電子部品が半田付けにより実装されている。２３はプリント基板２０のケース１への挿入方向を示す矢印である。
３０はプリント基板２０の端部に図示しない位置決め嵌入機構を介して装着されたコネクタハウジング、３１は一端がコネクタハウジング３０に圧入された複数の接続端子で、その他端はプリント基板２０に半田付け接続されている。
３２ａ、３２ｃはコネクタハウジング３０の上面および下面に設けられた矩形状突起部で、３２ａはケ−ス１に設けられた矩形状孔部の左上第一係止部９ａと嵌合する左上第二係止部、３２ｃはケ−ス１に設けられた矩形状孔部の左下第一係止部９ｃと嵌合する左下第二係止部で、図示していないが、コネクタハウジング３０の上面右上にはケース１に設けられた矩形状孔部の右上第一係止部９ｂと嵌合する右上第二係止部、コネクタハウジング３０の上面右下にはケース１に設けられた矩形状孔部の右下第一係止部９ｄと嵌合する右下第二係止部が形成されている。
【００１４】
また、図２および図３において、１０ａと１０ｂおよび１０ｃと１０ｄはケース１の左側面部１ｃと右側面部１ｄに各々設けられた対を成すＬ字形突起部で、１０ａは左前Ｌ字形突起部、１０ｂは左後Ｌ字形突起部、１０ｃは右前Ｌ字形突起部、１０ｄは右後Ｌ字形突起部である。１１ａ、１１ｂは対を成す左前Ｌ字形突起部１０ａと左後Ｌ字形突起部１０ｂの間、および右前Ｌ字形突起部１０ｃと右後Ｌ字形突起部１０ｄの間の左右側面部１ｃ、１ｄにそれぞれ設けられた左係合突起部と右係合突起部である。
また、図４において、４０はケースに取付けられる板金製の取付足で、係合孔４１および左右に折曲部４２を有し、ケース１の左右側面部１ｃ、１ｄに各々設けられた対を成すＬ字形突起部１０ａと１０ｂおよび１０ｃと１０ｄをガイド溝として挿入され、係合孔４１がケ−ス１の左右側面部１ｃ、１ｄに各々設けられた左係合突起部１１ａと右係合突起部１１ｂとに嵌合係止するように構成されている。
【００１５】
また、図５において、３３、３４はコネクタハウジング３０に圧入された接続端子３１をグループ化するための外壁部と仕切壁で、相手側の分割脱着コネクタ（図示せず）が嵌合抜止めされるよう構成されている。
【００１６】
次に、本実施の形態の車載電子制御装置の筐体およびその組立方法について説明する。
まず、図１に示すように、コネクタハウジング３０が装着され、各種電子部品２１、２２が実装されたプリント基板２０は、ケース１の開口部２から矢印２３方向に挿入される。挿入時において、プリント基板２０の左右の端部をケース１の左右の棚部３の上面に軽く接触させながら挿入することにより、プリント基板２０に実装された各種電子部品２１、２２等がケース１の上面部１ａや下面部１ｂに接触して部品が破損したりプリント基板２０から脱落するのを防止する。
その後、プリント基板２０の先端部がケース１の底面部１ｅ側に設けられた漏斗形状部４により所定の位置に誘導され、二対の矩形状突起部６ａと７ａおよび６ｂと７ｂの間に微細山形形状部８の山部を押しつぶしながら嵌入されて挟持される。
なお、プリント基板２０の先端部を挟持して固定する二対の矩形状突起部６ａと７ａおよび６ｂと７ｂは横幅を広げて一対の矩形状突起部としてもよく、その一方もしくは両方に複数本の微細山形形状部を設けてもよい。
【００１７】
一方、ケース１の開口部２は、自然状態では弧状に変形しているが、開口部２カバーを兼ねるコネクタハウジング３０を嵌め込むことによりその変形は矯正され、かつケ−ス１に設けられた矩形状孔部９ａ、９ｂ、９ｃ、９ｄがコネクタハウジング３０に設けられた矩形状突起部の左上第二係止部３２ａ、右上第二係止部、左下第二係止部３２ｃ、右下第二係止部と各々嵌合係止することによりコネクタハウジング３０はケース１の開口部２に固定される。
なお、ケース１の開口部２とコネクタハウジング３０との固定は、ケース１開口部２端面に設けた切り欠き部もしくは突起部をコネクタハウジング３０の端面に設けた突起部もしくは切り欠き部と係合させることにより固定してもよい。
【００１８】
次に、簡易なプレス加工により形成された取付足４０をケース１の左右側面部１ｃ、１ｄに各々設けられた対を成すＬ字形突起部１０ａと１０ｂおよび１０ｃと１０ｄをガイド溝として挿入し、Ｌ字形突起部１０ａ、１０ｂ、１０ｃ、１０ｄの弾性と取付足４０の弾性を利用して取付足４０をケ−ス１の左右側面部１ｃ、１ｄに各々設けられた左係合突起部１１ａと右係合突起部１１ｂを乗り越えて挿入した後、取付足４０の係合孔４１をそれぞれ左係合突起部１１ａと右係合突起部１１ｂに嵌入して係止する。
なお、取付足４０の左右の折曲部４２には長穴等（図示せず）が設けられており、車体にねじ止め等により固定される。
【００１９】
従来この種プリント基板収納ケースにおいては、プリント基板を挿入するために均質な溝が形成された左右一対のガイドレールがケース内面に形成されていたが、該均質な溝を有するガイドレ−ルをケ−スの左右内面に成形するためには、割り構造の抜き型や左右外面から溝成形に必要な型形状を持った複雑な構造の金型が必要となり、また、ケースの左右外面に取付足等を固定するための突起部を成形することが困難であった。
また、従来では、耐振動性の向上のためにプリント基板の奥行き方向の中間部をガイドレールの溝により支持する必要があったが、近年の電子回路の高集積化によるプリント基板面積の減少と、一方ではコネクタハウジングの小型化は機械的構造から困難であり、その結果プリント基板の形状はコネクタハウジングが装着される側が長く奥行き方向が短くなる傾向があり、プリント基板の奥行き方向の中間部における支持の必要がなくなっている。
【００２０】
実施の形態によれば、筐体を構成するケース１の成形は、簡易な金型を用いて行うことができ、また、コネクタハウジング３０によりケース１の開口部２を閉鎖するため、開口部２のカバー等が不要となり、さらに、プリント基板２０の固定および筐体の組立にネジ類が不要であるため組立性に優れると共に被取付け車種の対応して取付足４０を交換することにより種々の車種に取付けることが可能となりケース１を標準化することができる。
【００２１】
また、ケース１へのプリント基板２０の挿入においては、ケース内面に設けられた棚部３により誘導されるため、プリント基板２０に実装された各種電子部品等がケ−ス１の内面に接触することによる部品の破損・脱落・半田付け不良等が発生するのを防止することができると共にケース１を限界寸法まで小型化できる。
また、ケース１内のプリント基板２０はケース１底面部１ｅにおいて二対の矩形状突起部６ａと７ａおよび６ｂと７ｂにより挟持され、かつ矩形状突起部６ａ、６ｂにはプリント基板２０の挿入により押しつぶされて変形する微細山形形状部８ａ、８ｂが形成されているため、ケース１の成形寸法誤差やプリント基板２０の厚みに変動が合った場合においても確実にプリント基板２０を保持することができ、高い耐振動性を有する。
【００２２】
また、ケース１とコネクタハウジング３０の固定は、ケース１に設けられた矩形状孔部９ａ、９ｂ、９ｃ、９ｄとコネクタハウジング３０に設けられた矩形状突起部３２ａ、３２ｂ、３２ｃ、３２ｄを嵌合させることにより係止し、かつコネクタハウジング３０を嵌め込むケース１の開口部２は自然状態では弧状に変形しており、この変形はコネクタハウジング３０を嵌め込むことにより矯正されるため、嵌合部は確実に係止され、車体振動等による係止部の抜け落ちを防止することができる。
【００２３】
また、取付足４０は被取付車種に対応させて簡易なプレス加工により製造することができると共にケース１の左右両側面１ｃ、１ｄに固定されるため、取付足が外部配線の邪魔になることなく、かつ安定な左右両持ち構造となり取付足４０やケース１への取付部（Ｌ型突起部１０ａ、１０ｂ、１０ｃ、１０ｄ）に過度な荷重がかからない構造となっている。
【００２４】
【発明の効果】
以上のように、この発明に係る車載電子制御装置の筐体によれば、電子部品が実装されたプリント基板等を挿入するための開口部を一側面に有する矩形筒状のケースと、前記ケースの内面に設けられ、前記ケースに挿入される前記プリント基板を所定の位置に案内する棚部および漏斗形状部と、前記ケースの開口部と対向する底面部内側に設けられ、挿入された前記プリント基板の端部を挟持して保持する一対もしくは複数対の矩形状突起部と、前記プリント基板に装着され前記ケースの開口部のカバーを兼ねるコネクタハウジングと、前記ケースの外面に取付けられ車体に固定される取付足とを備えた車載電子制御装置の筐体であって、前記ケースと前記コネクタハウジングとは、前記ケースの開口部近傍に設けられた矩形状孔部からなる第一係止部と、前記コネクタハウジングに設けられた矩形状突起部からなる第二係止部とを嵌合させることにより固定され、前記ケースの開口部は、自然状態では弧状に変形しており、前記開口部に前記コネクタハウジングを挿入することにより前記開口部の変形を矯正し、前記第一係止部と前記第二係止部との嵌合を強化する機能を有するようにしたので、車載電子制御装置の筐体を構成するケースは簡易な金型を用いて成形することができ、かつケースの開口部は収納するプリント基板に装着したコネクタハウジングにより閉鎖する構造であるため、開口部のカバー等が不要となり、部品点数の削減およびコストの低減を図ることができると共に、ケースとコネクタハウジングの嵌合部は確実に係止され、車体振動等による係止部の抜け落ちを防止することができる。
【００２５】
また、ケースへのプリント基板の挿入においては、ケース内面に設けられた棚部により誘導されるため、プリント基板に実装された各種電子部品等がケ−スの内面に接触することによる部品の破損・脱落・半田付け不良等が発生するのを防止することができると共にケースを限界寸法まで小型化できる。
【００２６】
さらに、ケース内のプリント基板は、ケースに設けられた対を成す突起部に挟持されることにより固定され、ケースとケースカバーとなるコネクタハウジングは、各々に形成された孔部と突起部を嵌合させることにより固定されるため、筐体の組立にネジ類が不要となり、組立性に優れた筐体を得ることができる。
【００２７】
また、ケース内のプリント基板は、ケース底面部において二対の矩形状突起部により挟持され、かつケースの成形寸法誤差やプリント基板の厚みに変動が合った場合においても、矩形状突起部に形成されたプリント基板の挿入により押しつぶされて変形する微細山形形状部により確実に保持され高い耐振動性を有する。
【００２８】
また、筐体の取付けは、ケースの左右両側面に固定された取付足を用いて行うため、取付足やケースの取付部に過度な荷重がかからず、筐体の取付け信頼性を向上させることができる。また、ケースに嵌合により取付けた取付足を用いるため、簡易なプレス加工により形成される取付足のみを交換することにより種々の車種に取付けることが可能となりケースを標準化することができる。
【図面の簡単な説明】
【図１】この発明の実施の形態１による車載電子制御装置の筐体の構造を説明するための図である。
【図２】この発明の実施の形態１による車載電子制御装置の筐体ケースの外観図である。
【図３】この発明の実施の形態１による車載電子制御装置の筐体ケースの下面側から見た側面図である。
【図４】この発明の実施の形態１による車載電子制御装置の筐体の取付足を示す平面図である。
【図５】この発明の実施の形態１による車載電子制御装置を示す正面外観図である。
【符号の説明】
１ケ−ス、１ａ上面部、１ｂ下面部、１ｃ左側面部、１ｄ右側面部、１ｅ底面部、２開口部、３棚部、３ａ斜面部、４漏斗形状部、６ａ左下側矩形状突起部、６ｂ右下側矩形状突起部、７ａ左上側矩形状突起部、７ｂ右上側矩形状突起部、８微細山形形状部、９ａ左上第一係止部、９ｂ右上第一係止部、９ｃ左下第一係止部、９ｄ右下第一係止部、１０ａ左前Ｌ字形突起部、１０ｂ左後Ｌ字形突起部、１０ｃ右前Ｌ字形突起部、１０ｄ右後Ｌ字形突起部、１１ａ左係合突起部、１１ｂ右係合突起部、２０プリント基板、２１薄型電子部品、２２厚型電子部品、３０コネクタハウジング、３１接続端子、３２ａ左上第二係止部、３２ｃ左下第二係止部、３３外壁部、３４仕切壁、４０取付足、４１係合孔、４２折曲部。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a housing for storing a printed circuit board or the like in an in-vehicle electronic control device such as an engine control device.
[0002]
[Prior art]
In vehicle-mounted electronic control devices that are mass-produced, the main requirements for the printed circuit board storage case are that they can be manufactured using a simple mold structure, are easy to assemble, and are resistant to vehicle vibration. Can be mentioned.
In addition, it is important to standardize the storage case that the size of the printed circuit board to be stored and the various mounting specifications corresponding to various vehicle types can be accommodated.
For example, Japanese Patent Application Laid-Open No. 11-289178 and Japanese Patent Application Laid-Open No. 11-284375 have disclosed a case structure of a conventional electronic control device, both of which are a printed circuit board storage case and a cover. It has a structure in which printed circuit boards of various sizes can be stored in one type of case.
[0003]
[Problems to be solved by the invention]
Today's on-board electronic control devices are extremely highly integrated and miniaturized, and the change in the size of the printed circuit board due to changes in the control specifications is small, but rather the degree of freedom for various mounting specifications is ensured. It is important.
The casing of the conventional electronic control unit is configured as described above, and is configured to be compatible with various sizes of printed circuit boards in one type of case. However, there is no discussion regarding the mounting structure and standardization of the electronic control unit. However, there has been a problem that time and cost have to be spent due to the need to redesign and manufacture the housing due to the change in the mounting specification accompanying the change in the vehicle type.
[0004]
The present invention has been made to solve the above-described problems, and can be manufactured using a simple mold structure, is excellent in assemblability, can withstand vehicle vibration, and can be used for various types of vehicles. It is an object of the present invention to provide a housing with a high degree of freedom of attachment, to which an in-vehicle electronic control device can be attached.
[0005]
[Means for Solving the Problems]
The housing of the on-vehicle electronic control device according to the present invention is provided on a rectangular cylindrical case having an opening on one side for inserting a printed circuit board or the like on which an electronic component is mounted, and an inner surface of the case. A shelf part and a funnel-shaped part for guiding the printed circuit board inserted into the case to a predetermined position, and a bottom part inside facing the opening part of the case, and sandwiching an end part of the inserted printed circuit board A pair or a plurality of rectangular protrusions to be held, a connector housing mounted on the printed circuit board that also serves as a cover for the opening of the case, and mounting feet that are attached to the outer surface of the case and fixed to the vehicle body A housing of an in-vehicle electronic control device, wherein the case and the connector housing include a first locking portion formed of a rectangular hole provided in the vicinity of the opening of the case, The case is fixed by fitting with a second locking portion made of a rectangular projection provided on the nectar housing, and the opening of the case is deformed in an arc shape in a natural state, and the connector is connected to the opening. By inserting the housing, the deformation of the opening is corrected, and the function of strengthening the fitting between the first locking portion and the second locking portion is provided.
[0006]
Further, in the case of the on-vehicle electronic control device according to the present invention, the shelf provided on the inner surface of the case is provided on almost the entire surface from the vicinity of the opening to the bottom surface on both inner side surfaces of the case. While supporting both ends of the printed circuit board to be inserted, various electronic components mounted on the printed circuit board are arranged so as not to contact the case.
[0007]
Further, in the case of the on-vehicle electronic control device according to the present invention, the funnel-shaped portion provided on the inner surface of the case is provided at the upper part of each corner portion of the side surface portion and the bottom surface portion of the case, and is inserted into the case. The printed circuit board is arranged so as to be guided between a pair of rectangular protrusions provided on the bottom surface portion.
[0008]
Further, the case of the on-vehicle electronic control device according to the present invention is a printed circuit board in which a pair of rectangular protrusions provided inside the bottom surface of the case has a fine chevron-shaped portion and is inserted into the case Is inserted between the rectangular projections while crushing the fine chevron-shaped portion, thereby sandwiching and fixing the end portion of the printed circuit board.
[0009]
Furthermore, in the case of the on-vehicle electronic control device according to the present invention, the mounting foot engages with an engaging projection formed on both outer side surfaces of the case, and a bent portion for attaching to the vehicle body. And a pair of L-shaped projections provided on both outer sides of the case are inserted as guide grooves, and the engagement projections of the case and the engagement holes of the mounting feet are engaged with each other. The mounting foot is fixed to the outer surface of the case .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
Hereinafter, a case of an in-vehicle electronic control device according to an embodiment of the present invention will be described with reference to the drawings. 1A and 1B are views for explaining the structure of a casing of an in-vehicle electronic control device according to Embodiment 1 of the present invention. FIG. 1A is a sectional view showing a case portion of the casing, and FIG. FIG. 5C is a cross-sectional view showing a printed circuit board inserted into the case and a connector housing portion mounted on the printed circuit board. FIG. 2 is an external view of the case shown in FIG. 1A, and FIG. 3 is a side view of the case shown in FIG.
FIG. 4 is a view showing a mounting foot for attaching the housing of the in-vehicle electronic control device according to the present embodiment to the main body, and FIG. 5 is a front external view showing the in-vehicle electronic control device according to the present embodiment.
[0011]
1A and 2, reference numeral 1 denotes a rectangular cylindrical case formed by using, for example, PBT (polybutylene terephthalate) resin, and has an opening 2 on one side surface. 1a is an upper surface portion of the case 1, 1b is a lower surface portion of the case 1, 1c and 1d are left and right side portions toward the opening 2 of the case 1, and 1e is a bottom surface portion (opening of the case 1). Part 2).
As shown in FIG. 2, the opening height H of the opening 2 of the case 1 is centered compared to the left and right heights Hb because the upper surface 1a and the lower surface 1b of the case 1 are deformed in an arc shape. The height Ha of the part is small.
Reference numeral 3 denotes a shelf that is provided below the left side surface portion 1c and the right side surface portion 1d of the case 1 and supports both ends of a printed circuit board 20 to be described later inserted into the case 1, and has a slope portion 3a on the opening 2 side. . The shelf 3 has a sufficient inclination angle (the opening 2 side is low and the depth is high) in consideration of the draft angle of the mold used when forming the case 1.
4 is a funnel shape provided on the inner upper side of each corner portion of the left side surface portion 1c and the right side surface portion 1d and the bottom surface portion 1e of the case 1 and serving as a guide portion on the bottom surface portion 1e side of the printed circuit board 20 to be described later inserted into the case 1. Part.
[0012]
Reference numeral 5 denotes a region of the detailed view described in FIG.
Reference numerals 6a and 7a denote a pair of rectangular protrusions provided on the lower left side of the bottom 1e of the case 1, 6a being a lower left rectangular protrusion, and 7a being an upper left rectangular protrusion. Reference numerals 6b and 7b denote another pair of rectangular protrusions provided on the inner right lower portion of the bottom 1e of the case 1, 6b is a lower right rectangular protrusion, and 7b is an upper right rectangular protrusion. . Reference numeral 8 denotes a fine chevron-shaped portion provided on the lower left and lower right rectangular protrusions 6a and 6b.
Note that the funnel-shaped portion 4, the two pairs of rectangular protrusions 6a and 7a and 6b and 7b, and the fine chevron-shaped portion 8 are connected to the rectangular protrusion 6a by the funnel-shaped portion 4 with the printed circuit board 20 inserted into the case 1. 7a and 6b are guided between 7b and inserted into the rectangular projections 6a and 7a and 6b and 7b while crushing the crests of the fine chevron-shaped portion 8, thereby sandwiching the end of the printed circuit board 20. It is configured as follows.
Reference numerals 9a, 9b, 9c, and 9d are rectangular holes provided in the upper surface portion 1a and the lower surface portion 1b near the opening 2 of the case 1, respectively. 9a is the upper left first locking portion, and 9b is the upper right portion. The first locking portion, 9c is a lower left first locking portion, and 9d is a lower right first locking portion.
[0013]
In FIG. 1C, reference numeral 20 denotes a printed circuit board formed using, for example, a glass epoxy material, and various electronic devices such as a thin electronic component 21 on the lower surface and a thick electronic component 22 and a thin electronic component 21 on the upper surface. The component is mounted by soldering. Reference numeral 23 denotes an arrow indicating the insertion direction of the printed circuit board 20 into the case 1.
Reference numeral 30 denotes a connector housing mounted on the end portion of the printed circuit board 20 via a positioning insertion mechanism (not shown), 31 denotes a plurality of connection terminals press-fitted into the connector housing 30, and the other end is connected to the printed circuit board 20 by soldering. Has been.
Reference numerals 32a and 32c denote rectangular protrusions provided on the upper and lower surfaces of the connector housing 30, and reference numeral 32a denotes an upper left second engaging with the upper left first locking part 9a of the rectangular hole provided in the case 1. The locking portion 32c is a lower left second locking portion that fits with the lower left first locking portion 9c of the rectangular hole provided in the case 1, and is not shown in the drawing, but is not shown in the upper right upper surface of the connector housing 30 The upper right second locking portion that engages with the upper right first locking portion 9b of the rectangular hole provided in the case 1, and the rectangular hole provided in the case 1 at the lower right of the upper surface of the connector housing 30 A lower right second locking portion that fits with the lower right first locking portion 9d is formed.
[0014]
2 and 3, reference numerals 10a and 10b and 10c and 10d denote L-shaped protrusions which are provided on the left side surface portion 1c and the right side surface portion 1d of the case 1, respectively, and 10a is a left front L-shaped protrusion portion, 10b. Is a left rear L-shaped projection, 10c is a right front L-shaped projection, and 10d is a right rear L-shaped projection. 11a and 11b are respectively formed on the left and right side surface portions 1c and 1d between the pair of the front left L-shaped projection 10a and the left rear L-shaped projection 10b and between the right front L-shaped projection 10c and the right rear L-shaped projection 10d. These are the left engaging protrusion and the right engaging protrusion provided.
Also, in FIG. 4, reference numeral 40 denotes a sheet metal mounting foot attached to the case, which has an engagement hole 41 and left and right bent portions 42, and a pair provided on each of the left and right side portions 1 c and 1 d of the case 1. The L-shaped projections 10a and 10b and 10c and 10d are inserted as guide grooves, and the engagement holes 41 are engaged with the left engagement projections 11a provided on the left and right side surfaces 1c and 1d of the case 1, respectively. It is configured to be fitted and locked to the protrusion 11b.
[0015]
In FIG. 5, reference numerals 33 and 34 denote an outer wall portion and a partition wall for grouping the connection terminals 31 press-fitted into the connector housing 30, and a mating split connector (not shown) is fitted and retained. It is comprised so that.
[0016]
Next, the casing of the in-vehicle electronic control device according to the present embodiment and the assembling method thereof will be described.
First, as shown in FIG. 1, the printed circuit board 20 to which the connector housing 30 is mounted and various electronic components 21 and 22 are mounted is inserted from the opening 2 of the case 1 in the direction of the arrow 23. At the time of insertion, by inserting the left and right end portions of the printed circuit board 20 lightly in contact with the upper surfaces of the left and right shelf portions 3 of the case 1, various electronic components 21, 22 and the like mounted on the printed circuit board 20 are placed in the case 1. This prevents the component from being damaged or coming off the printed circuit board 20 by contacting the upper surface 1a or the lower surface 1b.
Thereafter, the front end portion of the printed circuit board 20 is guided to a predetermined position by the funnel-shaped portion 4 provided on the bottom surface portion 1e side of the case 1, and is finely formed between the two pairs of rectangular protrusions 6a and 7a and 6b and 7b. The crests of the chevron-shaped portion 8 are inserted and pinched while being crushed.
The two pairs of rectangular protrusions 6a and 7a and 6b and 7b that sandwich and fix the front end portion of the printed circuit board 20 may be widened to form a pair of rectangular protrusions. A fine chevron-shaped portion may be provided.
[0017]
On the other hand, the opening 2 of the case 1 is deformed in an arc shape in the natural state, but the deformation is corrected by fitting the connector housing 30 that also serves as the cover of the opening 2 and provided in the case 1. The rectangular holes 9a, 9b, 9c, and 9d are provided on the connector housing 30. The upper left second locking portion 32a, the upper right second locking portion, the lower left second locking portion 32c, and the lower right second The connector housing 30 is fixed to the opening 2 of the case 1 by being fitted and locked with the two locking portions.
The opening 2 of the case 1 and the connector housing 30 are fixed by engaging the notch or protrusion provided on the end face of the case 1 opening 2 with the protrusion or notch provided on the end face of the connector housing 30. You may fix by doing.
[0018]
Next, the mounting legs 40 formed by a simple press work are inserted as paired L-shaped projections 10a and 10b and 10c and 10d, which are respectively provided on the left and right side surfaces 1c and 1d of the case 1, as guide grooves, Using the elasticity of the L-shaped projections 10a, 10b, 10c, and 10d and the elasticity of the attachment feet 40, the attachment feet 40 and the left engagement projections 11a provided on the left and right side surface portions 1c and 1d of the case 1 respectively. After inserting over the right engaging protrusion 11b, the engaging hole 41 of the mounting foot 40 is fitted and locked to the left engaging protrusion 11a and the right engaging protrusion 11b, respectively.
The left and right bent portions 42 of the mounting foot 40 are provided with elongated holes (not shown) and are fixed to the vehicle body by screws or the like.
[0019]
Conventionally, in this type of printed circuit board storage case, a pair of left and right guide rails formed with a uniform groove for inserting a printed circuit board has been formed on the inner surface of the case. -In order to form on the left and right inner surfaces of the case, it is necessary to have a split structure punching die and a complicated structure mold that has the mold shape required for groove forming from the left and right outer surfaces, and the case is attached to the left and right outer surfaces of the case. It has been difficult to form a protrusion for fixing the like.
Conventionally, in order to improve vibration resistance, it has been necessary to support the intermediate portion in the depth direction of the printed circuit board with the groove of the guide rail. However, due to the recent high integration of electronic circuits, the printed circuit board area has decreased. On the other hand, it is difficult to reduce the size of the connector housing due to the mechanical structure. As a result, the shape of the printed circuit board tends to be longer on the side where the connector housing is mounted and shorter in the depth direction. There is no need for support.
[0020]
According to the embodiment, the case 1 constituting the housing can be molded using a simple mold, and the opening 2 of the case 1 is closed by the connector housing 30. In addition, since there is no need for screws and the like for fixing the printed circuit board 20 and assembling the housing, the assembly is excellent and the mounting feet 40 are exchanged in accordance with the mounted vehicle type. The case 1 can be standardized.
[0021]
Further, when the printed circuit board 20 is inserted into the case 1, since it is guided by the shelf portion 3 provided on the inner surface of the case, various electronic components mounted on the printed circuit board 20 come into contact with the inner surface of the case 1. As a result, it is possible to prevent parts from being damaged, dropped off, and poorly soldered, and the case 1 can be miniaturized to the limit size.
The printed circuit board 20 in the case 1 is sandwiched between two pairs of rectangular protrusions 6a and 7a and 6b and 7b on the bottom surface part 1e of the case 1, and the printed circuit board 20 is inserted into the rectangular protrusions 6a and 6b. Since the fine chevron-shaped portions 8a and 8b that are crushed and deformed are formed, the printed circuit board 20 can be securely held even when the molding dimensional error of the case 1 or the thickness of the printed circuit board 20 fluctuates. High vibration resistance.
[0022]
In addition, the case 1 and the connector housing 30 are fixed by fitting the rectangular holes 9a, 9b, 9c, 9d provided in the case 1 and the rectangular protrusions 32a, 32b, 32c, 32d provided in the connector housing 30. The opening 2 of the case 1 that is locked by fitting and fitting the connector housing 30 is deformed in an arc shape in a natural state, and since this deformation is corrected by fitting the connector housing 30, The portion is securely locked, and the locking portion can be prevented from falling off due to body vibration or the like.
[0023]
In addition, the mounting foot 40 can be manufactured by a simple press process corresponding to the mounted vehicle type and is fixed to the left and right side surfaces 1c and 1d of the case 1, so that the mounting foot does not interfere with the external wiring. In addition, a stable left-and-right-handed structure is provided, and an excessive load is not applied to the attachment feet 40 and the attachment portions (L-shaped protrusions 10a, 10b, 10c, and 10d) to the case 1.
[0024]
【The invention's effect】
As described above, according to the case of the in-vehicle electronic control device according to the present invention, the rectangular cylindrical case having an opening on one side surface for inserting a printed circuit board on which an electronic component is mounted, and the case The shelf is provided on the inner surface of the case and guides the printed circuit board to be inserted into the case into a predetermined position. The shelf and the funnel-shaped portion are provided on the inner side of the bottom surface facing the opening of the case. A pair or a plurality of pairs of rectangular projections that sandwich and hold the end of the board, a connector housing that is attached to the printed circuit board and also serves as a cover for the opening of the case, and is attached to the outer surface of the case and fixed to the vehicle body The case and the connector housing comprise a rectangular hole provided in the vicinity of the opening of the case. It is fixed by fitting one locking part and a second locking part made of a rectangular projection provided on the connector housing, and the opening of the case is deformed in an arc shape in the natural state. Since the connector housing is inserted into the opening, the deformation of the opening is corrected and the function of strengthening the fitting between the first locking portion and the second locking portion is provided. The case constituting the housing of the in-vehicle electronic control device can be molded using a simple mold, and the opening of the case is closed by a connector housing attached to a printed circuit board to be accommodated. This eliminates the need for a cover, etc., reducing the number of parts and reducing the cost, and the fitting part between the case and the connector housing is securely locked. Chi can be prevented.
[0025]
Also, since the printed circuit board is inserted into the case, it is guided by a shelf provided on the inner surface of the case, so that various electronic components mounted on the printed circuit board come into contact with the inner surface of the case and damage the components. -It is possible to prevent the occurrence of dropout and soldering failure, and the case can be miniaturized to the limit size.
[0026]
Further, the printed circuit board in the case is fixed by being sandwiched between a pair of protrusions provided in the case, and the connector housing serving as the case and the case cover is fitted with a hole and a protrusion formed in each. Since they are fixed by combining them, screws are not necessary for assembling the casing, and a casing with excellent assemblability can be obtained.
[0027]
In addition, the printed circuit board in the case is sandwiched between two pairs of rectangular projections on the bottom of the case, and is formed on the rectangular projection even when there are variations in the molding dimension error or the thickness of the printed circuit board. It is securely held by the fine chevron-shaped portion that is crushed and deformed by inserting the printed circuit board, and has high vibration resistance.
[0028]
In addition, the chassis is mounted using mounting feet fixed to the left and right side surfaces of the case, so that excessive load is not applied to the mounting feet and the mounting part of the case, improving the mounting reliability of the casing. be able to. Further, since the mounting feet attached to the case by fitting are used, it is possible to attach to various types of vehicles by replacing only the mounting feet formed by simple press working, and the case can be standardized.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining the structure of a housing of an in-vehicle electronic control device according to Embodiment 1 of the present invention;
FIG. 2 is an external view of a housing case of the in-vehicle electronic control device according to Embodiment 1 of the present invention.
FIG. 3 is a side view of the in-vehicle electronic control device according to Embodiment 1 of the present invention as viewed from the lower surface side of the housing case.
FIG. 4 is a plan view showing mounting feet of a housing of the in-vehicle electronic control device according to Embodiment 1 of the present invention.
FIG. 5 is a front external view showing the on-vehicle electronic control device according to Embodiment 1 of the present invention.
[Explanation of symbols]
1 case, 1a upper surface portion, 1b lower surface portion, 1c left side surface portion, 1d right side surface portion, 1e bottom surface portion, 2 opening portion, 3 shelf portion, 3a slope portion, 4 funnel shape portion, 6a lower left side rectangular projection portion, 6b Lower right rectangular protrusion, 7a Upper left rectangular protrusion, 7b Upper right rectangular protrusion, 8 Fine chevron shaped part, 9a Upper left first locking part, 9b Upper right first locking part, 9c Lower left first One locking portion, 9d Lower right first locking portion, 10a Left front L-shaped projection, 10b Left rear L-shaped projection, 10c Right front L-shaped projection, 10d Right rear L-shaped projection, 11a Left engagement projection 11b Right engaging protrusion, 20 Printed circuit board, 21 Thin electronic component, 22 Thick electronic component, 30 Connector housing, 31 Connection terminal, 32a Upper left second locking portion, 32c Lower left second locking portion, 33 Outer wall portion , 34 Partition wall, 40 Mounting foot, 41 Engagement hole, 42 Bent part

Claims

A rectangular cylindrical case having an opening on one side for inserting a printed circuit board or the like on which an electronic component is mounted, and the printed circuit board inserted into the case at a predetermined position. A guide shelf and a funnel-shaped portion; a pair or a plurality of pairs of rectangular projections provided inside the bottom surface facing the opening of the case and sandwiching and holding an end of the inserted printed circuit board; A housing of an in-vehicle electronic control device comprising: a connector housing that is mounted on the printed circuit board and also serves as a cover for the opening of the case; and an attachment foot that is attached to an outer surface of the case and fixed to a vehicle body. The case and the connector housing include a first locking portion including a rectangular hole provided in the vicinity of the opening of the case, and a rectangular protrusion provided in the connector housing. The opening portion of the case is deformed in an arc shape in a natural state, and by inserting the connector housing into the opening portion, the opening portion of the case is fixed. A housing for an in-vehicle electronic control device, which has a function of correcting deformation and strengthening fitting between the first locking portion and the second locking portion.

The shelf provided on the inner surface of the case is provided on almost the entire surface from the vicinity of the opening to the bottom surface on both inner side surfaces of the case, supports both ends of the printed board inserted into the case, and The casing of the on-vehicle electronic control device according to claim 1, wherein various electronic components mounted on the substrate are arranged so as not to contact the case.

The funnel-shaped portion provided on the inner surface of the case is provided at an upper portion of each corner portion of the side surface portion and the bottom surface portion of the case, and a printed circuit board to be inserted into the case is formed in a rectangular shape that forms a pair provided on the bottom surface portion. The housing of the electronic control device according to claim 1, wherein the housing is disposed so as to be guided between the shape protrusions.

The pair of rectangular protrusions provided on the inner side of the bottom surface of the case has a fine chevron-shaped part, and the printed circuit board to be inserted into the case is crushed by the fine chevron-shaped part. The casing of the on-vehicle electronic control device according to claim 1, wherein the casing of the printed circuit board is sandwiched and fixed by being inserted therebetween.

The mounting legs have engaging holes that engage with engaging protrusions formed on both outer side surfaces of the case and bent portions for mounting to the vehicle body, and are provided on both outer side surfaces of the case, respectively. A pair of L-shaped protrusions are inserted as guide grooves, and the attachment feet are fixed to the outer surface of the case by engaging the engagement protrusions of the case with the engagement holes of the attachment feet. The housing | casing of the vehicle-mounted electronic control apparatus of Claim 1 characterized by the above-mentioned.