JP3765295B2

JP3765295B2 - Electronic keyboard instrument

Info

Publication number: JP3765295B2
Application number: JP2002255421A
Authority: JP
Inventors: 秀輝石原; 尚久森
Original assignee: Yamaha Corp
Current assignee: Yamaha Corp
Priority date: 2001-09-19
Filing date: 2002-08-30
Publication date: 2006-04-12
Anticipated expiration: 2022-08-30
Also published as: JP2003167581A

Description

【０００１】
【発明の属する技術分野】
本発明は、電子鍵盤楽器の筐体構造に関する。
【０００２】
【従来の技術】
全体としてフラットな盤状の筐体形状を有する電子鍵盤楽器において、その筐体構造は、鍵盤部が載置される底板部と、鍵盤部の前に位置する口棒部と、鍵盤部の左右側に位置する左右の側板部と、後方上面を構成する屋根板部と、背面板部とで構成され、一般にこれらの各板部がネジ等を介して相互に結合されることで、ケース状の筐体が形成される。しかし、このような筐体構成では筐体内部の保守点検を行う際の筐体の分解及び再組立作業が面倒であった。
これに対して、実開昭６２−１０３３８２号公報には、電子鍵盤楽器の筐体を上面部及び背面部を一体化した後方カバーと本体部とで構成し、本体部に備わる底板部に対して後方カバーを蝶番によって結合し、該後方カバーを開閉可能にしたものが示されている。しかし、この場合は、筐体を組み立てる際に、後方カバーを本体部に固定するための最後のネジ締めが必ず筐体上面側においてなされるので、ネジ頭が上面に露出してしまい、外観上好ましくなかった。また、後方カバーは筐体本体部に対して着脱自在ではないため、組立が面倒であり、筐体内部の回路基板等の保守点検もやりにくい面があった。
【０００３】
また、上述のタイプの電子鍵盤楽器にあっては、保守点検のしやすさ等を考慮して、メイン回路基板は底板部に配置されていた。しかし、メイン回路基板を鍵盤部の背後において底板部上に設ける場合は、底板部の前後方向のサイズを大きくせざるを得ず、楽器の前後方向のサイズが大きくなってしまう。また、メイン回路基板を鍵盤部の下側において底板部上に設ける場合は、楽器のたて方向の厚みが増してしまう。
【０００４】
【発明の解決しようとする課題】
本発明は上述の点に鑑みてなされたもので、筐体を見栄えよくかつ簡便に組み立てることができ、また筐体内部の保守点検もしやすい筐体構造を有する電子鍵盤楽器を提供しようとするものである。
【０００５】
【課題を解決する手段】
本発明は、鍵盤部と、該鍵盤部を配置した筐体とを具備する電子鍵盤楽器において、前記筐体は、底板部と側板部と背面板部と屋根板部とを有し、前記底板部に前記鍵盤部が載置され、少なくとも前記底板部を含む第１の筐体部分に対して少なくとも前記屋根板部と前記背面板部とを含む第２の筐体部分が着脱可能であり、前記側板部は前記第１又は第２の筐体部分のいずれかに帰属し、前記第２の筐体部分に結合保持手段を有すると共に、前記背面板部において内側に折れ曲がった下縁部を有し、該結合保持手段の下端部を前記底板部の上面に位置させて前記第２の筐体部分を前記第１の筐体部分に対してスライド装着することで前記第１の筐体部分の前記底板部を前記第２の筐体部分の前記結合保持手段と前記背面板部との間に挟み込み、この挟み込まれた状態で固着することにより該第２の筐体部分を該第１の筐体部分に対して着脱式に取り付けてなる前記筐体を構成するようにしてなり、かつ、前記背面板部の内側に当該電子鍵盤楽器の回路部品が取り付けられていることを特徴とする。これによれば、第２の筐体部分側の結合保持手段の下端部を、第１の筐体部分側の底板部の上面に位置させて、第２の筐体部分を第１の筐体部分に対してスライド装着する構成であるため、第２の筐体部分に重量物があってもこれを確実に保持してスライド装着及び固着を行うことができ、また、第１の筐体部分側の底板部を第２の筐体部分側の結合保持手段と背面板部との間に挟み込み、この挟み込まれた状態で固着するので、第１の筐体部分と第２の筐体部分とが分離しにくく、その一方で、脱着も容易であるため内部の保守点検もし易い、優れた筐体構造を提供することができる。更に、背面板部の内側に当該電子鍵盤楽器の回路部品を取り付けるようにしているので、第２の筐体部分を取り外し方向に比較的少量スライドするだけで、背面板部の内側の回路部品の取り付け状態を確認することができ、保守点検がし易いという利点がある。
【０００７】
【発明の実施の形態】
以下、添付図面を参照して本発明の一実施例について説明する。
図１（ａ）は本発明に係る電子鍵盤楽器の一例を示す平面図であり、（ｂ）にその背面図、（ｃ）に底面図をそれぞれ示す。本実施例に係る電子鍵盤楽器の筐体１は、大別して筐体本体部２と筐体後部３とで構成され、図２に略示するように筐体本体部２に対して筐体後部３が着脱式に取り付けられる。筐体本体部２は、鍵盤部９が載置される底板部５と、鍵盤部９の前で底板部５から立ち上がる口棒部８と、鍵盤部９の左右側で底板部５から立ち上がる左右の側板部６ａ、６ｂとを含み、これら底板部５、側板部６ａ，６ｂ及び口棒部８はネジ等適宜の接合手段を介して相互に接合固定されている。筐体後部３は、筐体１の後方上面を構成する屋根板部４と、屋根板部４の後縁から立ち下がる背面板部７とを含み、屋根板部４と背面板部７はネジ等適宜の接合手段を介して相互に接合固定されている。背面板部７には、図１（ｂ）に示すように、メイントーンホール１０ａ，１０ｂが設けられており、これらは左右両スピーカ（図示せず）からの音響出力の放音口である。屋根板部４の所定個所には、図１（ａ）に示すように、スピーカ裏面からの音響振動を放音する開口部であるサブトーンホール１１ａ，１１ｂと各種操作スイッチ及び表示器等を含む操作パネル１２とが設けられている。
【０００８】
筐体本体部２に対する筐体後部３の取付は、筐体後部３を筐体本体部２に対してスライド固着するスライド固着手段を介して行われる。最初に説明する実施例においては、スライド固着手段を構成する機構は、筐体後部３においては屋根板部４の下面に設けられ、筐体本体部２においては左右側板部６ａ，６ｂの上端部に設けられており、これにより、該スライド固着手段は、筐体後部３を筐体本体部２の左右側板部６ａ，６ｂに対してスライド固着するように構成されている。
【０００９】
まず、筐体後部３の具体例について図３（ａ）〜（ｃ）を参照して説明する。（ａ）は筐体１内側から背面板部７の裏面を見た筐体後部３の立面図であり、（ｂ）は図３（ａ）の矢印ａから屋根板部４の下面を矢視した図であり、（ｃ）は筐体後部３の側面を図３（ａ）の矢印ｂから矢視した右側面図である。筐体後部３を構成する屋根板部４と背面板部７とは略々直角に結合されており、左右及び中央の３個所で結合保持板２１ａ〜２１ｃを介して両者の結合が補強されている。右側の結合保持板２１ａについて図３（ｃ）により説明すると、その後端部で背面板部７と結合し、上端部で屋根板部４と結合しており、下端部５３ａは保持板２１ａの垂直部から連設された折れ曲がり部となっていて、後述するように底板部５にネジ等を介して結合できるようになっている。他の結合保持板２１ｂ，２１ｃも同様に構成されている。背面板部７の左右端方寄りの所定個所には、図３（ａ）に示すように、それぞれスピーカ２０ａ，２ｂが具えられている。中央の結合保持板２１ｃは左右スピーカ２０ａ，２０ｂ間の音響分離の役目も果たしている。また、背面板部７の下縁部５１は内側に向けて略水平方向に折れ曲がっており、後述するように、底板部５の一辺縁に接してネジ等を介して接合される。
【００１０】
図３（ｂ）に示すように、屋根板部４の裏面の左右端部寄りの所定個所には、筐体後部３を左右側板部６ａ，６ｂに対してスライド固着するためのスライド固着手段の一構成要素として、突起部３１ａ〜３１ｄがそれぞれ設けられている。図３（ｃ）により屋根板部４裏面の右端部に設けられたスライド固着用突起部３１ａ、３１ｂについて説明すると、これらは前方寄り及び後方寄りの所定個所にそれぞれ設けられている。突起部３１ａ、３１ｂのそれぞれの先端部にはネジ頭３３ａ、３３ｂが形成されており、このネジ頭３３ａ、３３ｂから所定間隔開けたところにつば部３４ａ、３４ｂを有しており、このネジ頭３３ａ、３３ｂとつば部３４ａ、３４ｂの間にスライド用の隙間部３２ａ、３２ｂが形成されている。屋根板部４裏面の左端部に具備されているスライド固着用突起部３１ｃ，３１ｄも同様な構成である。
【００１１】
次に、筐体本体部２の左右側板部６ａ，６ｂの側に設けられるスライド固着手段の構成要素の一例について、図４及び図５により説明する。図４は筐体本体部２の上面図であり、図５（ａ）はその右側板部６ａの上面を拡大して示す図である。筐体本体部２の左右両側板部６ａ，６ｂの後方上面において、前記筐体後部３の前記スライド固着用突起部３１ａ〜３１ｄに対応する配置でスライド部３５ａ〜３５ｄがそれぞれ設けられている。図５（ａ）に示すとおり、各スライド部３５ａ、３５ｂは、大孔部３６ａ、３６ｂと、この大孔部３６ａ、３６ｂに連なり筐体前方に延びた長孔部３７ａ、３７ｂを具備しており、その周囲には凹部３８ａ，３８ｂが形成されている。大孔部３６ａ、３６ｂは、対応するスライド固着用突起部３１ａ，３１ｂのネジ頭３３ａ，３３ｂの挿通を許すサイズの径を有し、長孔部３７ａ、３７ｂの横幅は、ネジ頭３３ａ，３３ｂ及びつば部３４ａ，３４ｂの直径より小さい。凹部３８ａ，３８ｂは、筐体後部３と筐体本体部２が結合される際に、対応するスライド固着用突起部３１ａ，３１ｂのつば部３４ａ、３４ｂが嵌合する凹部であり、つば部３４ａ、３４ｂに適合する横幅と深さを有する。この凹部３８ａ，３８ｂの裏面の所定範囲において後述するようにテーパ面（図５（ｂ）の３９ａ）が形成されている。他のスライド部３５ｃ、３５ｄも同様の構造を有する。
【００１２】
筐体本体部２に対して筐体後部３を取り付けるには、図２に示すように、筐体本部２の背後から筐体後部３を設置し、屋根板部４下面のスライド固着用突起部３１ａ〜３１ｄのネジ頭３３ａ，３３ｂ，…を、左右側板部６ａ，６ｂのスライド部３５ａ〜３５ｄの対応する大孔部３６ａ，３６ｂ，…に落とし込み、その後筐体後部３全体を前方（矢印Ｘ方向）にスライドさせる。図５（ｂ）は、図５（ａ）のＧ−Ｇ線断面図であり、スライド部３５ａに、これに対応する突起部３１ａを落とし込んだ状態を示す。この状態では、各突起部３１ａ〜３１ｄのつば部３４ａ，３４ｂ，…はスライド部３５ａ〜３５ｄにおける対応する凹部３８ａ，３８ｂ，…に位置し、各突起部３１ａ〜３１ｄの隙間部３２ａ，３２ｂ，…はスライド部３５ａ〜３５ｄにおける対応する大孔部３６ａ，３６ｂ，…の高さに位置し、各突起部３１ａ〜３１ｄのネジ頭３３ａ，３３ｂ，…は対応する大孔部３６ａ，３６ｂ，…よりも下に突出する。この状態から筐体後部３（図５（ｂ）における屋根板部４）を前方つまり矢印Ｘ方向にスライドさせると、各突起部３１ａ〜３１ｄの隙間部３２ａ，３２ｂ，…がスライド部３５ａ〜３５ｄの対応する長孔部３７ａ，３７ｂ，…に案内されて前方に移動することができ、これによって筐体後部３が前方にスライドし、筐体本体部２に装着される。
【００１３】
各スライド部３５ａ〜３５ｄにおける凹部３８ａ，３８ｂ，…の裏面の所定範囲にはテーパ面３９ａ,…がそれぞれ形成されている。テーパ面３９ａ,…の傾斜は楽器前方に向かって下向きになされており、テーパ面３９ａ，…の下方傾斜に従ってスライド部３５ａ〜３５ｄが次第に肉厚になってゆく。テーパ面３９ａ，…の個所において、各スライド部３５ａ〜３５ｄの板厚は対応する突起部３１ａ〜３１ｄの隙間部３２ａ，３２ｂ，…の幅よりも徐々に厚くなる。このため、筐体後部３のスライド完了位置（つまり筐体後部３の取り付け位置）において、隙間部３２ａ，３２ｂ，…の個所で、すなわちネジ頭３３ａ，３３ｂ，…とつば部３４ａ，３４ｂ，…の間で、それぞれに対応するスライド部３５ａ〜３５ｄをきつく狭持する。すなわち、テーパー面３９ａ，…を登りきったネジ頭３３ａ，３３ｂ，…がスライド部３５ａ〜３５ｄの厚みにより下方へ押し下げられるので、屋根板部４は左右側板部６ａ，６ｂに強く押し付けられ固定される。このようにして、筐体後部３は、前方にスライドされて側板部６ａ，６ｂに固着され、筐体本体部２に対して取り付けられる。
【００１４】
図５（ｂ）に示すように、スライド部３５ａ〜３５ｄ裏面の後方端部には、それぞれアジャスタ突起部４０ａ，…が設けられている。アジャスタ突起部４０ａ，…は、各スライド部３５ａ〜３５ｄの大孔部３６ａ，３６ｂ，…の直後に設けられており、筐体本体部２から取り外すために筐体後部３を後方にスライドした際、スライド固着用突起部３１ａ〜３１ｄのネジ頭３３ａ，３３ｂ，…は、それぞれ対応するアジャスタ突起部４０ａ，…でスライドを停止される。アジャスタ突起部４０ａ，…により、スライド固着用突起部３１ａ〜３１ｄのネジ頭３３ａ，３３ｂ，…を対応する大孔部３６ａ，３６ｂ，…の下方に位置させることができる。よって、筐体後部３を筐体本体部２から取り外す作業を円滑に行える。
【００１５】
筐体本体部２と筐体後部３は、上述のスライド固着手段による結合に加えて、次に述べるように、底板部５と筐体後部３の後方下端部においても、更に結合されており、その結合をより強固かつ確実なものとしている。
【００１６】
背面板部７の下縁部５１は、図３（ｃ）に示すように、内側に向けて略水平方向に折れ曲がっており、この下縁部５１にはネジ孔５２ａ〜５２ｆが設けられている。結合保持板２１ａ〜２１ｃの下端部５３ａ〜５３ｃ（図３（ａ）参照）も折れ曲がり部となっていて、それぞれの下端部５３ａ〜５３ｃにはネジ孔５４ａ〜５４ｃが設けられている。背面板部７の下縁部５１は底板部５の下面の高さの位置に位置し、結合保持板２１ａ〜２１ｃの下端部５３ａ〜５３ｃは底板部５の上面の高さ位置に位置しており、下縁部５１と下端部５３ａ〜５３ｃの間に底板部５を挟み込む構造になっている。筐体後部３を筐体本体部２にスライド装着するときに、下縁部５１と下端部５３ａ〜５３ｃの間に底板部５の後縁部が嵌入される。背面板部７の下縁部５１は底板部５の下面側に接しており、各ネジ孔５２ａ〜５２ｆで底板部５に螺合される。また、結合保持板２１ａ〜２１ｃの下端部５３ａ〜５３ｃは底板部５の上面側に接しており、それぞれネジ孔５４ａ〜５４ｃで底板部５に螺合される。このネジ止めは、図１（ｃ）に示されているように、全て底板部５の下面からなされる。背面板部７の下縁部５１と結合保持板２１ａ〜２１ｃの下端部５３ａ〜５３ｃにおいて複数のネジ止めがなされ、かつ下縁部５１と下端部５３ａ〜５３ｃのそれぞれのネジ止め位置が楽器の前後方向にずれているので、筐体本体部２に固定された筐体後部３は前後方向にガタツキにくい。
【００１７】
筐体後部３を筐体本体部２から取り外すには、底板部５下面に施されたネジ止めを外し、筐体後部３を楽器後方（矢印Ｘと反対方向）にスライドさせる。これにより、筐体後部３の突起部３１ａ〜３１ｄとスライド部３５ａ〜３５ｄのテーパ面３９ａ，…との係合・固着が解かれる。各突起部３１ａ〜３１ｄのネジ頭３３ａ，３３ｂ，…は、スライド部３５ａ〜３５ｄに設けられたアジャスタ突起部４０ａ…で停止され、それぞれの対応する大孔部３６ａ，３６ｂ，…の下方の位置し、該大孔部３６ａ，３６ｂ，…を通って上方に移動可能となる。よって、後方スライド停止位置で筐体後部３を持ち上げることで、筐体後部３を筐体本体部２から容易に取り外すことができる。
【００１８】
図３に戻り、背面板部７には、音源等を含むメイン回路基板２２ａ、２２ｂが配設されており（図３（ａ）参照）、また屋根板部４裏面の操作パネル１２下方に当たる個所に、パネル回路基板６０が配置されている（図３（ｂ）参照）。このように筐体後部３の側に回路基板を配置とすることで、前記回路基板は筐体後部３と共に筐体本体部２に対して着脱可能となる。よって、筐体１内の回路基板等の保守作業を行う場合は、筐体後部３を筐体本体部２から後方にスライドさせて取り外して、筐体後部３を作業しやすい状態に置いた上で、メイン回路基板２２ａ、２２ｂ等の保守作業を行えばよいので、保守点検作業を行いやすい。また、底板部５にメイン回路基板２２ａ、２２ｂ等を配置するスペースを設けなくてもよいため、底板部５の前後方向サイズを縮小でき、楽器サイズの小型化及び楽器の軽量化を図ることができる。
前記実施例では、左右側板部６ａ，６ｂを筐体本体部２に帰属してこれと一体的に設けたが、左右側板部６ａ，６ｂを筐体後部３に帰属してこれと一体的に設けるようにしてもよい。この場合にあっても筐体本体部２に対し筐体後部３を後方から着脱させる本発明の技術思想を反映させることができる。この場合は、当然屋根板部４と側板部６ａ，６ｂとは裏面（内側）からＬ型金具を介して一体構成とするが、側板部６ａ，６ｂ前方と口棒部８左右両端部とにおいての嵌合は、単に突き合わせ構造のみとする。即ち、口棒部８両端面を左右側板部６ａ，６ｂ前方内縁が前方スライドして重なり、軽く接する構成に仕上げればよい。口棒部８と底板部５との結合は、前述した結合保持板２１ａ〜２１ｃを小さくし簡素化した結合金具若しくはＬ型金具で結合するものとする。
【００１９】
また、上述の例では、筐体後部３の後方下端部と筐体本体部２をネジ止めより固定する例を示したが、他の実施形態として、図６に示すように、ネジ止めを用いることなく、弾性変形嵌合手段（パッチン嵌合手段）で行うようにしてもよい。図６（ａ）は底板部５と背面板部７の一部を下面から見た概略斜視図であり、説明の便宜上、それぞれの左端部の一部分のみ図示して他を代表するものとする。図において、背面板部７の下縁部５１には、切り溝５１ａを介して嵌合突起６１が上向きに突設される。嵌合突起６１には係合用の孔６４が設けられている。嵌合突起６１に対応する底板部５の下面の所定個所には、弾性変形型の嵌合係止部６２が設けられている。図６（ｂ）は嵌合係止部６２だけを取り出して示す図で、見やすくするために（ａ）とは上下反転して示した。嵌合係止部６２は、嵌合突起６１の進入を許す凹部６５と、先端に嵌合離脱用の操作部６３ｂとそのすぐ内側で凹部６５に臨むように設けられた係合突起６３ａとを有する弾性嵌合体６３とで構成される。係合突起６３ａは片面テーパ状の先端を有し、凹部６５内に進退自在に臨むよう作用する。
背面板部７と底板部５を結合する際、嵌合突起６１を凹部６５に挿入させると、嵌合突起６１によって係合突起６３ａの片面テーパ部が押され、係合突起６３ａが凹部６５から後退し、嵌合突起６１の孔６４に対応する位置で係合突起６３ａに対する係合突起６１による押圧が解除され、弾性嵌合体６３による反発力により係合突起６３ａが凹部６５内に戻り、係合突起６３ａが嵌合突起６１の孔６４に嵌合する。係合突起６３ａが嵌合突起６１の孔６４に嵌合した状態を抽出して断面図にて示すと図６（ｃ）のようである。こうして背面板部７と底板部５とが固定される。上記突起６１が凹部６５に嵌入する途中において、上記切り溝５１ａを設けたことで基部５１ｂが弾性的になり背面板部７が底板部５に対しフレキシビリティを発生させ、スムーズな嵌合を可能にしている。
弾性嵌合体６３において、係合突起６４に略々直角に嵌合離脱用の操作部６３ｂが形成されている。背面板部７と底板部５の取り外しを行う際は、前記操作部６３ｂを引いて、係合突起６３ａを凹部６５から後退させ、嵌合突起６１の孔６４に対する係合突起６３ａの嵌合を解き、嵌合突起６１を凹部６５から外す。
このような２つの弾性変形嵌合手段（弾性嵌合体６３と基部５１ｂ）を用いると、筐体本体部２と筐体後部３の結合にネジ止めが一切不要となるので、筐体本体部２と筐体後部３の分解及び取り付け作業が容易になる。
【００２０】
なお、スライド固着手段としては、上述のタイプに限らず、筐体本体部２に対して、筐体後部３をスライド移動した後、固着するものであればいかなる機構によるものでもよい。また、本実施例においては、屋根板部４の裏面と、それに対応する側板部６ａ，６ｂの上面とを係合させ、前後方向にスライドする例を示したが、これに限らず、例えば、背面板部７の裏面７５と側板部６ａ，６ｂの後面を係合させ、上下方向にスライドするような構成等であってもよい。
また、上述の実施例においては、筐体後部３を構成する背面板部７と屋根板部４は略々直角をなして結合されていたが、これに限らず、例えば６０度、１２０度、…等適宜角度を持って結合されていればよい。
筐体後部３にメイン回路部等を設ける構成のみを実施する場合は、上述のスライド固着手段に代えて適宜の手段で筐体後部３と筐体本体部２を着脱自在に取り付けるようにしてもよい。
【００２１】
最後に、筐体後部３を筐体本体部２にスライド固着させるためのスライド固着手段の別の実施例につき図７により説明する。この実施例では、スライド部３５１ａ〜３５１ｄが筐体本体部２の底板部５に設けられており、該スライド部３５１ａ〜３５１ｄにスライド式に係合するスライド固着用突起部３１１ａ〜３１１ｄが、筐体後部３の屋根板部４から下方に延設された左右の脚部４１ａ，４１ｂの下縁に設けられている。例えば、図７（ａ）に見えるように、２つのスライド部３５１ｃ，３５１ｄが形成されたスライド部材３５１が、底板部５の一端（一方の側板部６ｂ寄りの箇所）に、ねじ止め等により取り付けられる。同様に、２つのスライド部３５１ａ，３５１ｂが形成されたもう１つのスライド部材が、底板部５の他端（他方の側板部６ａ寄りの箇所）に、ねじ止め等により取り付けられるが、図７（ａ）では側板部６ａの陰になっているので見ることができず、番号３５１ａ，３５１ｂのみを参考のために付記しておく。各スライド部３５１ａ〜３５１ｄは、図５（ａ），（ｂ）に示された前述のスライド部３５ａと同様に、大孔部（３６ａ）、長孔部（３７ａ）、テーパ面（３９ａ）等の要素を含んで構成される。よって、これらの要素の詳細図示及び説明は図５及びその説明を援用するものとし、図７ではこれらの要素の詳細図示及び説明は省略する。
【００２２】
屋根板部４の下面にて下向きに延びた脚部４１ａ，４１ｂの下縁は、内側に略直角に曲げられることで細長の水平部を成している。この脚部４１ａ，４１ｂの下縁の水平部において、下向きに、スライド固着用突起部３１１ａ〜３１１ｄが設けられている。脚部４１ｂに設けられる１つのスライド固着用突起部３１１ｃを拡大して示すと図７（ｂ）のようであり、図５（ｂ）に示された前述のスライド固着用突起部３１ａと同様に、ねじ頭３３１ｃ、間隙部３２１ｃ、つば部３４１ｃ等の要素を含んで構成される。スライド固着用突起部３１１ｃはナット３１２にねじ結合して脚部４１ｂの下縁水平部に固定される。底板部５に設けられた４つのスライド部３５１ａ〜３５１ｄの配置にそれぞれ対応するように、屋根板部４の脚部４１ａ，４１ｂにおいて４つのスライド固着用突起部３１１ａ〜３１１ｄが設けられる。他のスライド固着用突起部３１１ａ，３１１ｂ，３１１ｄは、図７（ａ）において陰になっているため明確には図示されてないが、突起部３１１ｃと同一の構成からなっている。
【００２３】
図７の実施例において、筐体後部３を筐体本体部２に取り付ける際の、各スライド固着用突起部３１１ａ〜３１１ｄの各スライド部３５１ａ〜３５１ｄに対するスライド固着動作は、図５に示した実施例における各スライド固着用突起部３１ａ〜３１ｄの各スライド部３５ａ〜３５ｄに対するスライド固着動作と同様であるため、説明を省略する。つまり、テーパ面の存在によって、矢印Ｘ方向に筐体後部３が筐体本体部２に押し込まれていくほど、かたく結合するようになる。なお、スライド部３５１ａ〜３５１ｄの上面から側板部６ａ，６ｂの上縁までの距離Ｄ１と、スライド固着用突起部３１１ａ〜３１１ｄのつば部（３４１ｃ）から屋根板部４の下面までの距離Ｄ２との関係は、適宜のクリアランスＣ分だけ、Ｄ１の方が長くなっている。つまり、Ｄ１＝Ｄ２＋Ｃである。これにより、屋根板部４が筐体本体部２の方に圧接され、かたい結合が得られる。
【００２４】
スライド固着手段における孔部及びテーパ面を有するスライド部３５１ａ〜３５１ｄとスライド固着用突起部３１１ａ〜３１１ｄとの配置（図７参照）は、上記実施例とは逆であってもよい。すなわち、大孔部（３６ａ）、長孔部（３７ａ）、テーパ面（３９ａ）等の要素（図５参照）を含んでなるスライド部３５１ａ〜３５１ｄ（図７参照）を、屋根板部４側の脚部４１ａ，４１ｂの下縁水平部に設け、スライド固着用突起部３１１ａ〜３１１ｄを上向きにして底板部５側のスライド部材３５１に設けるようにしてもよい。また、図５の例のような側板部６ａ，６ｂの側にスライド部３５ａ〜３５ｄを設ける場合も同様に、スライド固着手段における孔部及びテーパ面を有するスライド部３５ａ〜３５ｄとスライド固着用突起部３１ａ〜３１ｄとの配置を、上記実施例とは逆にしてよい。すなわち、大孔部（３６ａ）、長孔部（３７ａ）、テーパ面（３９ａ）等の要素を含んでなるスライド部３５ａ〜３５ｄを、屋根板部４側の下側に設け、スライド固着用突起部３１ａ〜３１ｄを上向きにして側板部６ａ，６ｂの上面に設けるようにしてよい。
【００２５】
【発明の効果】
以上のように、本発明によると、筐体を見栄えよくかつ簡便に組み立てることができ、また筐体内部の保守点検もしやすい筐体構造を有する電子鍵盤楽器を提供できるとう優れた効果を奏する。
【図面の簡単な説明】
【図１】（ａ）は本発明に係る電子鍵盤楽器の一実施例を示す平面図、（ｂ）は同実施例に係る電子鍵盤楽器の背面図、（ｃ）は同実施例に係る電子鍵盤楽器の底面図。
【図２】同実施例に係る電子鍵盤楽器の筐体を筐体本体と筐体後部に分けた概略斜視図。
【図３】同実施例に係る電子鍵盤楽器の筐体後部を説明するための図であって、（ａ）は筐体後部の立面図、（ｂ）は筐体後部の下面図、（ｃ）は筐体後部の側面図。
【図４】同実施例に係る電子鍵盤楽器の筐体本体の平面図。
【図５】同実施例に係る電子鍵盤楽器の筐体のスライド固着手段を説明するための図であって、（ａ）は図３に示した筐体本体の右側板部上面を拡大視した平面図、（ｂ）は（ａ）のＧ−Ｇ線断面図。
【図６】筐体後部と筐体本体の下方固定手段の他の実施例を説明するための図であって、（ａ）は下方固定手段の他の実施例を示す概略斜視図、（ｂ）は（ａ）のパッチン嵌合係止部の一例を示す概略斜視図、（ｃ）は係合突起６３ａが嵌合突起６１の孔６４に嵌合した状態を抽出して示す断面図。
【図７】筐体後部を筐体本体部にスライド固着させるためのスライド固着手段の別の実施例を説明するための図であって、（ａ）は筐体本体と筐体後部に分けて略示する概略分解斜視図、（ｂ）は筐体後部に設けられるスライド固着用突起部の側面図。
【符号の説明】
１筐体
２筐体本体部
３筐体後部
４屋根板部
５底板部
６ａ，６ｂ側板部
７背面板部
８口棒部
９鍵盤部
２１ａ，２１ｂ，２１ｃ結合保持板
３１ａ〜３１ｄ，３１１ａ〜３１１ｄスライド固着用突起部
３５ａ〜３５ｄ，３５１ａ〜３５１ｄスライド部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a housing structure for an electronic keyboard instrument.
[0002]
[Prior art]
In an electronic keyboard instrument having an overall flat board-like casing shape, the casing structure includes a bottom plate portion on which the keyboard portion is placed, a mouth bar portion located in front of the keyboard portion, and left and right sides of the keyboard portion. It is composed of left and right side plate parts located on the side, a roof plate part constituting the rear upper surface, and a back plate part. Generally, these plate parts are connected to each other via screws, etc. Is formed. However, in such a case configuration, the disassembly and reassembly work of the case when performing maintenance and inspection inside the case is troublesome.
On the other hand, Japanese Utility Model Laid-Open No. 62-103382 discloses an electronic keyboard musical instrument housing having a rear cover and a main body united with an upper surface part and a rear surface part, and a bottom plate part provided in the main body part. The rear cover is connected by a hinge so that the rear cover can be opened and closed. However, in this case, when assembling the casing, the final screw tightening for fixing the rear cover to the main body is always performed on the upper surface side of the casing. It was not preferable. Further, since the rear cover is not detachable from the housing main body, it is troublesome to assemble, and maintenance and inspection of the circuit board and the like inside the housing are difficult.
[0003]
In the electronic keyboard instrument of the above-described type, the main circuit board is disposed on the bottom plate in consideration of ease of maintenance and inspection. However, when the main circuit board is provided on the bottom plate portion behind the keyboard portion, the size of the bottom plate portion in the front-rear direction must be increased, and the size of the musical instrument in the front-rear direction is increased. Further, when the main circuit board is provided on the bottom plate part below the keyboard part, the thickness of the instrument in the vertical direction increases.
[0004]
[Problem to be Solved by the Invention]
SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide an electronic keyboard instrument having a casing structure that can be easily and easily assembled and can be easily maintained and inspected. It is.
[0005]
[Means for solving the problems]
The present invention relates to an electronic keyboard instrument comprising a keyboard portion and a housing in which the keyboard portion is disposed, wherein the housing includes a bottom plate portion, a side plate portion, a back plate portion, and a roof plate portion, and the bottom plate The keyboard part is placed on the part, and the second casing part including at least the roof panel part and the back panel part can be attached to and detached from the first casing part including at least the bottom plate part, The side plate part belongs to either the first or second housing part, and the second housing part has coupling holding means. And has a lower edge portion bent inward at the back plate portion. Then, the lower end portion of the coupling holding means is positioned on the upper surface of the bottom plate portion, and the second casing portion is slidably attached to the first casing portion, so that the first casing portion The bottom plate portion is sandwiched between the coupling holding means of the second casing portion and the back plate portion, and the second casing portion is fixed in the sandwiched state to fix the second casing portion to the first casing. The casing is configured to be detachably attached to a body part, and circuit components of the electronic keyboard instrument are attached to the inside of the back plate. According to this, the lower end portion of the coupling holding means on the second housing portion side is positioned on the upper surface of the bottom plate portion on the first housing portion side, and the second housing portion is placed on the first housing. Since the configuration is such that the second casing portion is slid and mounted, even if there is a heavy object in the second casing portion, it can be securely held and attached and fixed, and the first casing portion can be fixed. Since the bottom plate portion on the side is sandwiched between the coupling holding means on the second housing portion side and the back plate portion, and fixed in this sandwiched state, the first housing portion and the second housing portion On the other hand, it is difficult to separate, and on the other hand, since it can be easily detached, it is possible to provide an excellent housing structure that facilitates internal maintenance and inspection. Further, since the circuit components of the electronic keyboard instrument are attached to the inside of the back plate portion, the circuit components on the inside of the back plate portion are simply slid in a relatively small amount in the removing direction. There is an advantage that the attachment state can be confirmed and maintenance inspection is easy.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1A is a plan view showing an example of an electronic keyboard instrument according to the present invention. FIG. 1B is a rear view thereof, and FIG. 1C is a bottom view thereof. The casing 1 of the electronic keyboard instrument according to the present embodiment is roughly divided into a casing main body 2 and a casing rear 3, and as shown schematically in FIG. 3 is detachably attached. The main body 2 includes a bottom plate portion 5 on which the keyboard portion 9 is placed, a mouth bar portion 8 that rises from the bottom plate portion 5 in front of the keyboard portion 9, and left and right portions that rise from the bottom plate portion 5 on the left and right sides of the keyboard portion 9. The bottom plate portion 5, the side plate portions 6a, 6b, and the mouth bar portion 8 are fixed to each other via appropriate connecting means such as screws. The housing rear portion 3 includes a roof plate portion 4 constituting the rear upper surface of the housing 1 and a back plate portion 7 falling from the rear edge of the roof plate portion 4. The roof plate portion 4 and the back plate portion 7 are screwed. These are fixedly bonded to each other through appropriate bonding means. As shown in FIG. 1B, the back plate portion 7 is provided with main tone holes 10a, 10b, which are sound output ports for sound output from both left and right speakers (not shown). As shown in FIG. 1A, an operation including subtone holes 11a and 11b, which are openings for emitting acoustic vibration from the back surface of the speaker, various operation switches, a display, and the like are provided at predetermined locations on the roof plate portion 4. A panel 12 is provided.
[0008]
Attachment of the housing rear portion 3 to the housing main body portion 2 is performed via a slide fixing means for slidingly fixing the housing rear portion 3 to the housing main body portion 2. In the embodiment described first, the mechanism constituting the slide fixing means is provided on the lower surface of the roof plate portion 4 in the housing rear portion 3, and the upper end portions of the left and right side plate portions 6 a and 6 b in the housing body portion 2. Accordingly, the slide fixing means is configured to slide and fix the housing rear portion 3 to the left and right side plate portions 6 a and 6 b of the housing main body portion 2.
[0009]
First, a specific example of the housing rear portion 3 will be described with reference to FIGS. (A) is an elevational view of the housing rear part 3 when the back surface of the back plate part 7 is viewed from the inside of the housing 1, and (b) is an arrow from the arrow a in FIG. It is the figure seen, (c) is the right view which looked at the side surface of the housing | casing rear part 3 from the arrow b of Fig.3 (a). The roof plate portion 4 and the back plate portion 7 constituting the housing rear portion 3 are coupled at a substantially right angle, and the coupling between the two is reinforced through the coupling holding plates 21a to 21c at the three positions of the left and right and the center. Yes. Referring to FIG. 3 (c), the right side of the holding plate 21a is connected to the back plate 7 at the rear end, and is connected to the roof plate 4 at the upper end, and the lower end 53a is perpendicular to the holding plate 21a. This is a bent portion continuously provided from the portion, and can be coupled to the bottom plate portion 5 via a screw or the like as will be described later. The other coupling holding plates 21b and 21c are similarly configured. As shown in FIG. 3A, speakers 20a and 2b are provided at predetermined positions near the left and right ends of the back plate portion 7, respectively. The central coupling holding plate 21c also plays a role of acoustic separation between the left and right speakers 20a, 20b. Further, the lower edge portion 51 of the back plate portion 7 is bent in a substantially horizontal direction toward the inside, and is joined to one edge of the bottom plate portion 5 via a screw or the like as will be described later.
[0010]
As shown in FIG. 3 (b), slide fixing means for slidingly fixing the housing rear portion 3 to the left and right side plate portions 6a and 6b is provided at predetermined positions near the left and right ends of the back surface of the roof plate portion 4. As one component, projections 31a to 31d are provided, respectively. The slide fixing projections 31a and 31b provided at the right end of the back surface of the roof plate 4 will be described with reference to FIG. 3C. These are provided at predetermined positions near the front and rear, respectively. Screw heads 33a and 33b are formed at the tip portions of the protrusions 31a and 31b, and flange portions 34a and 34b are provided at predetermined intervals from the screw heads 33a and 33b. Sliding gaps 32a and 32b are formed between 33a and 33b and the flanges 34a and 34b. The slide fixing projections 31c and 31d provided at the left end of the back surface of the roof plate 4 have the same configuration.
[0011]
Next, an example of the constituent elements of the slide fixing means provided on the left and right side plate portions 6a and 6b of the housing body 2 will be described with reference to FIGS. FIG. 4 is a top view of the housing body 2, and FIG. 5A is an enlarged view of the top surface of the right side plate 6 a. Slide portions 35 a to 35 d are respectively provided on the rear upper surfaces of the left and right side plate portions 6 a and 6 b of the housing main body 2 in an arrangement corresponding to the slide fixing protrusions 31 a to 31 d of the housing rear portion 3. As shown in FIG. 5 (a), each slide portion 35a, 35b includes a large hole portion 36a, 36b, and a long hole portion 37a, 37b extending to the front of the housing that is connected to the large hole portion 36a, 36b. The recesses 38a and 38b are formed around the periphery. The large hole portions 36a, 36b have a diameter that allows the screw heads 33a, 33b of the corresponding slide fixing projections 31a, 31b to be inserted, and the widths of the long hole portions 37a, 37b are the screw heads 33a, 33b. And smaller than the diameter of the flange portions 34a, 34b. The concave portions 38a and 38b are concave portions into which the flange portions 34a and 34b of the corresponding slide fixing projection portions 31a and 31b are fitted when the housing rear portion 3 and the housing main body portion 2 are coupled to each other. , 34b with a width and depth that fit. As will be described later, a tapered surface (39a in FIG. 5B) is formed in a predetermined range on the back surfaces of the recesses 38a and 38b. The other slide portions 35c and 35d have the same structure.
[0012]
In order to attach the housing rear portion 3 to the housing main body portion 2, as shown in FIG. 2, the housing rear portion 3 is installed from behind the housing main portion 2, and the slide fixing protrusion on the lower surface of the roof plate portion 4. The screw heads 33a, 33b, ... of 31a to 31d are dropped into the corresponding large holes 36a, 36b, ... of the slide parts 35a to 35d of the left and right side plate parts 6a, 6b, and then the entire rear part 3 of the casing is moved forward (arrow X Slide in the direction). FIG. 5B is a cross-sectional view taken along the line GG in FIG. 5A, and shows a state in which the protrusion 31a corresponding to the slide part 35a is dropped. In this state, the flange portions 34a, 34b,... Of the projections 31a to 31d are located in the corresponding recesses 38a, 38b,... In the slide portions 35a to 35d, and the gap portions 32a, 32b,. Is located at the height of the corresponding large hole portions 36a, 36b,... In the slide portions 35a to 35d, and the screw heads 33a, 33b,... Of the projection portions 31a to 31d are the corresponding large hole portions 36a, 36b,. Protrude below. When the casing rear portion 3 (the roof plate portion 4 in FIG. 5B) is slid forward, that is, in the direction of the arrow X from this state, the gap portions 32a, 32b,... Of the projections 31a to 31d are slid portions 35a to 35d. Can be moved forward by being guided by the corresponding long hole portions 37 a, 37 b,..., Whereby the housing rear portion 3 slides forward and is attached to the housing main body portion 2.
[0013]
Tapered surfaces 39a,... Are formed in predetermined ranges on the back surfaces of the recesses 38a, 38b,. The taper surfaces 39a,... Are inclined downward toward the front of the instrument, and the slide portions 35a-35d gradually become thicker as the taper surfaces 39a,. In the tapered surfaces 39a,..., The plate thickness of each of the slide portions 35a to 35d is gradually thicker than the width of the gap portions 32a, 32b,. For this reason, at the slide completion position of the housing rear portion 3 (that is, the mounting position of the housing rear portion 3), at the gap portions 32a, 32b,..., That is, the screw heads 33a, 33b,. Between, the slide parts 35a-35d corresponding to each are tightly pinched. That is, the screw heads 33a, 33b,... That have fully climbed the tapered surfaces 39a,... Are pushed down by the thickness of the slide portions 35a to 35d, so that the roof plate 4 is strongly pressed and fixed to the left and right side plates 6a, 6b. The In this way, the housing rear portion 3 is slid forward and fixed to the side plate portions 6 a and 6 b, and is attached to the housing main body portion 2.
[0014]
As shown in FIG. 5B, adjuster protrusions 40a,... Are provided at the rear ends of the back surfaces of the slide portions 35a to 35d, respectively. The adjuster protrusions 40a,... Are provided immediately after the large holes 36a, 36b,... Of the slide portions 35a-35d, and when the rear case 3 is slid rearward to be removed from the main body 2. The screw heads 33a, 33b,... Of the slide fixing projections 31a to 31d are stopped by the corresponding adjuster projections 40a,. The adjuster protrusions 40a,... Allow the screw heads 33a, 33b,... Of the slide fixing protrusions 31a to 31d to be positioned below the corresponding large holes 36a, 36b,. Therefore, the operation of removing the housing rear portion 3 from the housing body portion 2 can be performed smoothly.
[0015]
In addition to the coupling by the above-mentioned slide fixing means, the casing main body 2 and the casing rear part 3 are further combined at the bottom plate part 5 and the rear lower end of the casing rear part 3 as described below. The bond is made stronger and more secure.
[0016]
As shown in FIG. 3C, the lower edge portion 51 of the back plate portion 7 is bent inward in a substantially horizontal direction, and the lower edge portion 51 is provided with screw holes 52a to 52f. . The lower end portions 53a to 53c (see FIG. 3A) of the coupling holding plates 21a to 21c are also bent portions, and screw holes 54a to 54c are provided in the respective lower end portions 53a to 53c. The lower edge portion 51 of the back plate portion 7 is located at the height position of the lower surface of the bottom plate portion 5, and the lower end portions 53 a to 53 c of the coupling holding plates 21 a to 21 c are located at the height position of the upper surface of the bottom plate portion 5. The bottom plate portion 5 is sandwiched between the lower edge portion 51 and the lower end portions 53a to 53c. When the housing rear portion 3 is slidably mounted on the housing main body portion 2, the rear edge portion of the bottom plate portion 5 is fitted between the lower edge portion 51 and the lower end portions 53a to 53c. The lower edge portion 51 of the back plate portion 7 is in contact with the lower surface side of the bottom plate portion 5 and is screwed to the bottom plate portion 5 through the screw holes 52a to 52f. The lower end portions 53a to 53c of the coupling holding plates 21a to 21c are in contact with the upper surface side of the bottom plate portion 5, and are screwed into the bottom plate portion 5 through screw holes 54a to 54c, respectively. This screwing is all done from the bottom surface of the bottom plate portion 5 as shown in FIG. A plurality of screws are fixed at the lower edge portion 51 of the back plate portion 7 and the lower end portions 53a to 53c of the coupling holding plates 21a to 21c, and the screwing positions of the lower edge portion 51 and the lower end portions 53a to 53c are Since it is displaced in the front-rear direction, the housing rear portion 3 fixed to the housing body 2 is less likely to rattle in the front-rear direction.
[0017]
In order to remove the housing rear portion 3 from the housing main body portion 2, screws attached to the lower surface of the bottom plate portion 5 are removed, and the housing rear portion 3 is slid rearward (in the direction opposite to the arrow X). As a result, the engagement / fixation between the projecting portions 31a to 31d of the housing rear portion 3 and the tapered surfaces 39a of the slide portions 35a to 35d is released. The screw heads 33a, 33b,... Of the protrusions 31a to 31d are stopped by adjuster protrusions 40a provided on the slide portions 35a to 35d, and positions below the corresponding large hole portions 36a, 36b,. Then, it can move upward through the large holes 36a, 36b,. Therefore, the housing rear portion 3 can be easily detached from the housing main body portion 2 by lifting the housing rear portion 3 at the rear slide stop position.
[0018]
Returning to FIG. 3, main circuit boards 22 a and 22 b including a sound source and the like are disposed on the back plate portion 7 (see FIG. 3A), and a portion of the back surface of the roof plate portion 4 that is below the operation panel 12. In addition, a panel circuit board 60 is disposed (see FIG. 3B). Thus, by arranging the circuit board on the side of the housing rear portion 3, the circuit board can be attached to and detached from the housing body portion 2 together with the housing rear portion 3. Therefore, when performing maintenance work on the circuit board or the like in the housing 1, the housing rear portion 3 is slid rearward from the housing main body portion 2 to be removed, and the housing rear portion 3 is placed in an easy-to-work state. Thus, maintenance work for the main circuit boards 22a, 22b, etc. may be performed, so that maintenance inspection work is easy to perform. Further, since it is not necessary to provide a space for disposing the main circuit boards 22a, 22b and the like in the bottom plate portion 5, the size of the bottom plate portion 5 in the front-rear direction can be reduced, thereby reducing the instrument size and the instrument weight. it can.
In the above-described embodiment, the left and right side plate portions 6a and 6b belong to the housing body portion 2 and are provided integrally therewith. However, the left and right side plate portions 6a and 6b belong to the case rear portion 3 and are integrated therewith. You may make it provide. Even in this case, it is possible to reflect the technical idea of the present invention in which the housing rear portion 3 is attached to and detached from the housing main body portion 2 from behind. In this case, of course, the roof plate portion 4 and the side plate portions 6a and 6b are integrally formed from the back surface (inner side) via the L-shaped metal fitting, but at the front side of the side plate portions 6a and 6b and the left and right ends of the mouth bar portion 8 The fitting is simply a butting structure. That is, the both ends of the mouth bar portion 8 may be finished so that the front inner edges of the left and right side plate portions 6a and 6b slide forward to overlap and touch lightly. The mouth bar portion 8 and the bottom plate portion 5 are joined by a simplified fitting or L-shaped fitting with the above-described coupling holding plates 21a to 21c being made smaller.
[0019]
In the above example, the rear lower end portion of the housing rear portion 3 and the housing main body portion 2 are fixed by screwing. However, as another embodiment, screwing is used as shown in FIG. Instead, it may be performed by elastic deformation fitting means (Patchon fitting means). FIG. 6A is a schematic perspective view of a part of the bottom plate part 5 and the back plate part 7 as seen from the lower surface. For convenience of explanation, only a part of each left end part is shown and the others are represented. In the figure, a fitting projection 61 is provided on the lower edge portion 51 of the back plate portion 7 so as to protrude upward through a kerf 51a. The fitting protrusion 61 is provided with a hole 64 for engagement. An elastic deformation-type fitting locking portion 62 is provided at a predetermined position on the lower surface of the bottom plate portion 5 corresponding to the fitting protrusion 61. FIG. 6B is a view showing only the fitting and locking portion 62 taken out, and is shown upside down with respect to FIG. The fitting locking portion 62 includes a recess 65 that allows the fitting protrusion 61 to enter, an operation portion 63b for fitting / removing at the tip, and an engagement projection 63a provided so as to face the recess 65 immediately inside. It is comprised with the elastic fitting body 63 which has. The engaging protrusion 63a has a one-side tapered tip, and acts so as to be able to advance and retract in the recess 65.
When the rear plate portion 7 and the bottom plate portion 5 are coupled, when the fitting protrusion 61 is inserted into the recess 65, the one-side tapered portion of the engaging protrusion 63 a is pushed by the fitting protrusion 61, and the engaging protrusion 63 a is moved from the recess 65. The engagement protrusion 63a is released from the engagement protrusion 63a at a position corresponding to the hole 64 of the engagement protrusion 61, and the engagement protrusion 63a returns to the recess 65 due to the repulsive force of the elastic fitting body 63. The mating protrusion 63 a is fitted into the hole 64 of the fitting protrusion 61. FIG. 6 (c) shows a state where the engagement protrusion 63a is fitted in the hole 64 of the fitting protrusion 61 and is shown in a sectional view. Thus, the back plate portion 7 and the bottom plate portion 5 are fixed. In the middle of fitting the projection 61 into the recess 65, the cut groove 51a is provided, so that the base 51b becomes elastic and the back plate 7 generates flexibility with respect to the bottom plate 5 so that smooth fitting is possible. I have to.
In the elastic fitting body 63, an operation portion 63b for fitting / removing is formed substantially perpendicular to the engagement protrusion 64. When removing the back plate portion 7 and the bottom plate portion 5, the operating portion 63 b is pulled to retract the engaging projection 63 a from the recess 65, and the engaging projection 63 a is fitted into the hole 64 of the fitting projection 61. Unscrew and remove the fitting protrusion 61 from the recess 65.
When such two elastic deformation fitting means (the elastic fitting body 63 and the base 51b) are used, no screwing is required for the connection between the housing main body 2 and the rear housing 3, so that the housing main body 2 And disassembly and attachment work of the housing rear part 3 are facilitated.
[0020]
Note that the slide fixing means is not limited to the above-described type, and any mechanism may be used as long as the casing rear section 3 is slid with respect to the casing main body 2 and then fixed. Further, in the present embodiment, the back surface of the roof plate portion 4 and the corresponding upper surfaces of the side plate portions 6a and 6b are engaged and slid in the front-rear direction. A configuration in which the back surface 75 of the back plate portion 7 and the rear surfaces of the side plate portions 6a and 6b are engaged and slid in the vertical direction may be employed.
Moreover, in the above-mentioned Example, although the backplate part 7 and the roof board part 4 which comprise the housing | casing rear part 3 were made | formed substantially at right angles, it is not restricted to this, For example, 60 degree | times, 120 degree | times, ... etc. What is necessary is just to combine with an appropriate angle.
When only the configuration in which the main circuit portion or the like is provided in the housing rear portion 3, the housing rear portion 3 and the housing main body portion 2 may be detachably attached by appropriate means instead of the above-described slide fixing means. Good.
[0021]
Finally, another embodiment of the slide fixing means for slidingly fixing the rear case 3 to the main body 2 will be described with reference to FIG. In this embodiment, slide portions 351a to 351d are provided on the bottom plate portion 5 of the housing body 2, and slide fixing projections 311a to 311d that are slidably engaged with the slide portions 351a to 351d are provided in the housing. It is provided at the lower edge of the left and right leg portions 41 a and 41 b extending downward from the roof plate portion 4 of the rear body portion 3. For example, as shown in FIG. 7A, a slide member 351 having two slide portions 351c and 351d is attached to one end of the bottom plate portion 5 (location near one side plate portion 6b) by screwing or the like. It is done. Similarly, another slide member in which two slide portions 351a and 351b are formed is attached to the other end of the bottom plate portion 5 (location near the other side plate portion 6a) by screwing or the like. In a), it cannot be seen because it is behind the side plate portion 6a, and only the numbers 351a and 351b are added for reference. Each of the slide portions 351a to 351d has a large hole portion (36a), a long hole portion (37a), a tapered surface (39a), etc., similar to the slide portion 35a shown in FIGS. 5 (a) and 5 (b). It is comprised including the element of. Therefore, detailed illustration and description of these elements shall be referred to FIG. 5 and the description thereof, and detailed illustration and description of these elements are omitted in FIG.
[0022]
The lower edges of the leg portions 41a and 41b extending downward on the lower surface of the roof plate portion 4 are bent inward at a substantially right angle to form an elongated horizontal portion. Slide fixing projections 311a to 311d are provided downward in the horizontal portion of the lower edge of the legs 41a and 41b. FIG. 7B shows an enlarged view of one slide fixing projection 311c provided on the leg portion 41b, which is similar to the slide fixing projection 31a shown in FIG. 5B. , Including a screw head 331c, a gap portion 321c, a flange portion 341c, and the like. The slide fixing projection 311c is screwed to the nut 312 and fixed to the horizontal portion of the lower edge of the leg 41b. Four slide fixing projections 311a to 311d are provided on the leg portions 41a and 41b of the roof plate portion 4 so as to correspond to the arrangement of the four slide portions 351a to 351d provided on the bottom plate portion 5, respectively. Other slide fixing projections 311a, 311b, 311d are shaded in FIG. 7A and are not clearly shown, but have the same configuration as the projection 311c.
[0023]
In the embodiment shown in FIG. 7, the slide fixing operation of the slide fixing projections 311a to 311d with respect to the slide portions 351a to 351d when the rear case 3 is attached to the main body 2 is the implementation shown in FIG. Since this is the same as the slide fixing operation of the slide fixing projections 31a to 31d in the example with respect to the slide portions 35a to 35d, the description thereof is omitted. That is, due to the presence of the tapered surface, the housing rear portion 3 is more strongly coupled in the direction of the arrow X as it is pushed into the housing body 2. The distance D1 from the upper surface of the slide portions 351a to 351d to the upper edges of the side plate portions 6a and 6b, and the distance D2 from the collar portion (341c) of the slide fixing projection portions 311a to 311d to the lower surface of the roof plate portion 4. As for the relationship, D1 is longer by an appropriate clearance C. That is, D1 = D2 + C. As a result, the roof plate portion 4 is pressed against the housing body portion 2 to obtain a hard connection.
[0024]
The arrangement (see FIG. 7) of the slide portions 351a to 351d having the hole and the tapered surface and the slide fixing projections 311a to 311d in the slide fixing means may be opposite to the above embodiment. That is, slide portions 351a to 351d (see FIG. 7) including elements (see FIG. 5) such as a large hole portion (36a), a long hole portion (37a), and a tapered surface (39a) are arranged on the roof plate portion 4 side. May be provided on the lower edge horizontal portion of the leg portions 41a and 41b, and provided on the slide member 351 on the bottom plate portion 5 side with the slide fixing projections 311a to 311d facing upward. Similarly, when the slide portions 35a to 35d are provided on the side plate portions 6a and 6b as in the example of FIG. 5, the slide portions 35a to 35d having holes and tapered surfaces in the slide fixing means and the slide fixing protrusions are provided. The arrangement of the portions 31a to 31d may be reversed from the above embodiment. That is, slide portions 35a to 35d including elements such as a large hole portion (36a), a long hole portion (37a), and a tapered surface (39a) are provided on the lower side of the roof plate portion 4 side, and a slide fixing protrusion The portions 31a to 31d may be provided on the upper surfaces of the side plate portions 6a and 6b with the portions 31a to 31d facing upward.
[0025]
【The invention's effect】
As described above, according to the present invention, it is possible to provide an electronic keyboard instrument having a housing structure that can be easily and easily assembled and can be easily maintained and inspected.
[Brief description of the drawings]
1A is a plan view showing one embodiment of an electronic keyboard instrument according to the present invention, FIG. 1B is a rear view of the electronic keyboard instrument according to the embodiment, and FIG. 1C is an electronic diagram according to the embodiment. The bottom view of a keyboard instrument.
FIG. 2 is a schematic perspective view in which a casing of the electronic keyboard instrument according to the embodiment is divided into a casing body and a rear portion of the casing.
FIGS. 3A and 3B are diagrams for explaining the rear part of the casing of the electronic keyboard instrument according to the embodiment, where FIG. 3A is an elevation view of the rear part of the casing, FIG. 3B is a bottom view of the rear part of the casing; c) Side view of the rear part of the housing.
FIG. 4 is a plan view of a casing body of the electronic keyboard instrument according to the embodiment.
FIG. 5 is a view for explaining a slide fixing means of the casing of the electronic keyboard instrument according to the embodiment, wherein (a) is an enlarged view of the upper surface of the right side plate portion of the casing body shown in FIG. 3; The top view, (b) is the GG sectional view taken on the line of (a).
6A and 6B are diagrams for explaining another embodiment of the lower fixing means for the rear portion of the casing and the casing main body, and FIG. 6A is a schematic perspective view showing another embodiment of the lower fixing means; (A) is a schematic perspective view which shows an example of the patchon fitting locking part of (a), (c) is sectional drawing which extracts and shows the state which the engagement protrusion 63a fitted to the hole 64 of the fitting protrusion 61. FIG.
FIG. 7 is a diagram for explaining another embodiment of the slide fixing means for slidingly fixing the rear portion of the housing to the main body portion of the case, and (a) is divided into the main body of the case and the rear portion of the case. The schematic exploded perspective view to show schematically, (b) is a side view of the protrusion part for slide fixation provided in a housing | casing rear part.
[Explanation of symbols]
1 housing
2 Case body
3 Rear case
4 Roof plate
5 Bottom plate
6a, 6b Side plate
7 Back plate
8 mouth stick
9 Keyboard
21a, 21b, 21c coupling holding plate
31a to 31d, 311a to 311d Slide fixing protrusion
35a-35d, 351a-351d Slide part

Claims

In an electronic keyboard instrument comprising a keyboard part and a housing in which the keyboard part is arranged,
The housing includes a bottom plate portion, a side plate portion, a back plate portion, and a roof plate portion, the keyboard portion is placed on the bottom plate portion, and at least a first case portion including the bottom plate portion. A second housing part including at least the roof plate part and the back plate part is detachable, and the side plate part belongs to either the first or second housing part,
While organic coupling holding means to said second housing portion, have a lower edge which is bent inwardly at said back plate portion, said lower end portion of the coupling holding means is positioned on the upper surface of the bottom plate portion The bottom plate portion of the first casing portion is slidably attached to the first casing portion so that the bottom holding portion of the first casing portion and the back plate are connected to the second casing portion. The housing formed by detachably attaching the second housing portion to the first housing portion by being sandwiched between the lower edge portion of the portion and being fixed in the sandwiched state. An electronic keyboard instrument comprising: a circuit component of the electronic keyboard instrument, wherein the electronic keyboard instrument circuit component is attached to the inside of the back plate portion.

The electronic device according to claim 1, wherein the side plate portion belongs to the first housing portion, and the second housing portion is slidably mounted on the side plate portion of the first housing portion. Keyboard instrument.