JP3700769B2

JP3700769B2 - Support structure

Info

Publication number: JP3700769B2
Application number: JP2001174711A
Authority: JP
Inventors: 一郎大須賀; 憲市吉永
Original assignee: Yamaha Corp
Current assignee: Yamaha Corp
Priority date: 2001-06-08
Filing date: 2001-06-08
Publication date: 2005-09-28
Anticipated expiration: 2021-06-08
Also published as: JP2002366154A

Description

【０００１】
【発明の属する技術分野】
本発明は、支持部材に糸、紐、ワイヤ等の線条材を支持させるための構造に関するものである。
【０００２】
【従来の技術】
従来より、線条材の端部を支持する際には、取付作業が簡単で、しかも低コストであることから、次のような支持構造が多く採用されている。図１２に示すように、この支持構造では、板状の支持部材１０１にその端縁に開くスリット１０３を形成するとともに、線条材１０５の端部にスリット１０３の幅よりも大きい大径部１０７を設けている。そして、線条材１０５をスリット１０３に挿入し、大径部１０７を支持部材１０１に係止させている。
【０００３】
【発明が解決しようとする課題】
しかしながら、このような支持構造では、図１３（ａ）に示すように、線条材１０５に対し、例えばスリット１０３の開口端に向いて外力Ａが作用すると、線条材１０５がスリット１０３に沿って移動し、スリット１０３から脱離するおそれがあった。
【０００４】
さらに、図１３（ｂ）に示すように、スリット１０３に沿う分力を有する外力ＢまたはＣが作用し、これら分力が線条材１０５とスリット１０３壁面との間の摩擦力を越える場合には、１方向に外力が作用するだけで、線条材１０５がスリット１０３から脱離するおそれがある。
【０００５】
このとき、例えば線条材１０５が導電体で構成されていると、脱離した線条材１０５が他の金属部材に接触してショートを生じるに至る場合がある。或いは、脱離した線条材１０５が、その近傍に配設されている可動部材に巻き込まれ、機械の作動に支障をきたすこともある。
【０００６】
本発明は、上記問題を解決するためになされたものであって、簡単な構成で支持部材から線条材が脱離するのを有効に防止できる支持構造を提供することを目的とする。
【０００７】
【課題を解決するための手段】
本発明は、上記目的を達成するため、支持部材に対する線条材の支持構造であって、支持部材に該支持部材の端縁に開いたスリットを形成し、線条材に前記スリットより幅の大きい大径部を設け、前記スリットに前記線条材を挿入して前記大径部を係止した状態とし、前記スリットには、前記支持部材端縁への開口部に通じる開口近傍部分の延在方向に対して、異なる方向に延びる曲折部分を該開口近傍部分より奥に形成し、前記線条材に作用する外力における前記開口近傍部分及び曲折部分を含む平面に沿う分力と、前記開口近傍部分及び曲折部分のいずれか一方における法線とのなす角が、前記スリットの壁面と前記線条材との間の摩擦角よりも小さくなるように、前記開口近傍部分と曲折部分とのなす角が設定されていることを特徴とする支持構造、
並びに、支持部材に対する線条材の支持構造であって、支持部材に該支持部材の端縁に開いたスリットを形成し、線条材に前記スリットより幅の大きい大径部を設け、前記スリットに前記線条材を挿入して前記大径部を係止した状態とし、前記スリットには、前記支持部材端縁への開口部に通じる開口近傍部分の延在方向に対して、異なる方向に延びる曲折部分を該開口近傍部分より奥に形成し、前記曲折部分が曲線状に形成されていることを特徴とする支持構造、
並びに、支持部材に対する線条材の支持構造であって、支持部材に該支持部材の端縁に開いたスリットを形成し、線条材に前記スリットより幅の大きい大径部を設け、前記スリットに前記線条材を挿入して前記大径部を係止した状態とし、前記スリットには、前記支持部材端縁への開口部に通じる開口近傍部分の延在方向に対して、異なる方向に延びる曲折部分を該開口近傍部分より奥に形成し、前記スリットにおける少なくとも一部に、前記支持部材または前記線条材の弾性変形により通過し得る挟窄部が形成されていることを特徴とする支持構造、
並びに、複数並んだ鍵と、鍵全体を支持する鍵盤フレームと、該鍵盤フレームに支持されて鍵に連動する可動部材と、鍵並び方向に延びている線条材と、前記鍵盤フレームに鍵並び方向の両端で支持され、押鍵時の前記線条材端部間の距離変化を検知するセンサを装着した支持部材とを備え、押鍵により鍵に連動した可動部材が前記線条材を押圧するように構成した鍵盤装置のためのアフタータッチ検知用線条材の支持構造であって、支持部材に該支持部材の端縁に開いたスリットを形成し、線条材に前記スリットより幅の大きい大径部を設け、前記スリットに前記線条材を挿入して前記大径部を係止した状態とし、前記スリットには、前記支持部材端縁への開口部に通じる開口近傍部分の延在方向に対して、異なる方向に延びる曲折部分を該開口近傍部分より奥に形成し、前記支持部材を弾性体で構成して、前記線条材に張力を発生させる方向に、前記大径部を付勢するようにしたことを特徴とする支持構造を提供するものである。
【０００９】
【発明の実施の形態】
以下、本発明の第１実施形態について図面を参照しつつ説明する。図１は、本発明の第１実施形態を示す支持構造の正面図である。
【００１０】
以下において、同一又は同種の部分には同一符号を付して説明を省略することがある。
【００１１】
図１に示す本実施形態の支持構造では、線条材１０５は細い紐であり、支持部材１が板バネで構成されている。この支持部材１に形成されたスリット２は、支持部材１の端縁に開く開口近傍部分である第１通路３と、この第１通路３の奥端に連続する曲折部分として形成された第２通路４とから構成されている。これら第１通路３及び第２通路４は、９０度より小さい鋭角をなして交叉している。
【００１２】
線条材１０５を支持部材１に取り付ける際には、線条材１０５を長さ方向に引っ張るか、或いは支持部材１を線条材１０５側に湾曲させた状態で、線条材１０５をスリット２の開口部から第１通路３，第２通路４の順に挿入する。そして、図１に示すように、線条材１０５を第２通路４の奥端まで挿入した状態で、大径部１０７を支持部材１に係止させることにより、線条材１０５は支持部材１に保持される。このとき、線条材１０５の端部に設けられている大径部１０７は、板バネである支持部材１によって、線条材１０５が張力を受ける方向に付勢されるため、大径部１０７が強固に係止され、線条材１０５を確実に固定することができる。
【００１３】
以上のように、本実施形態によれば、支持部材１に形成されるスリット２が、支持部材１の端縁に開く第１通路３と、これと異なる方向に延びる第２通路４とから構成されているため、次の効果を得ることができる。すなわち、線条材１０５に対して、いずれか一方の通路、例えば第２通路４の奥端から該通路に沿う方向に外力が作用した場合、線条材１０５は該方向には移動されるが、それとは異なる方向に延びる第１通路３に沿う方向に対してはその移動が阻止される。したがって、一方向に作用する外力に対して、線条材１０５が支持部材１から脱離するのを防止することができる。
【００１４】
ここで、スリット２の形状は上記したものに限定されず、以下に示すような種々の形状にすることができる。
【００１５】
例えば、図２（ａ）に示すように、第１通路３と第２通路４とを曲折点５を介して形成し曲折点５から第２通路４と反対方向に延びる延長部分６を設けるように構成してもよい。この場合、例えば同図のＸ方向の外力が作用すると、線条材１０５は延長部分６の奥端部に進入し、外力に対して安定的な位置となる。したがって、線条材１０５が支持部材１から脱離するのを防止することができる。
【００１６】
或いは、図２（ｂ）に示すように、スリット２をＳ字形に形成してもよい。このようにすると、スリット２の形成方向が連続的に変化するため、異なる方向に延びる複数の通路を連結した場合と同等の効果を得ることができる。したがって、Ｓ字形に沿う移動を生じさせるように外力が特定の方向と順序をもって作用する場合を除き、種々の方向から作用する外力に対して、線条材１０５が支持部材１から脱離するのを防止することができる。
【００１７】
ところで、スリット２の壁面と線条材１０５との間には摩擦力が作用するため、この摩擦力を利用して第１通路３と第２通路４とのなす角を設定すると、より確実に線条材１０５の脱離を防止することができる。
【００１８】
図３に示すように、例えば第１通路３及び第２通路４が角度φで交叉していると仮定する。ここで、摩擦力を考慮しない場合、第１通路３では角度γの範囲から外力が作用すると線条材１０５が開口部側へ通路内を移動する一方、第２通路４では角度δの範囲から外力が作用すると線条材１０５が開口部側へ通路内を移動する。したがって、同図に示すように、第１及び第２通路３，４のいずれにおいても線条材１０５が移動する外力の角度は、角度γ及びδの重複範囲である。そして、この角度は平面幾何の性質から第１通路３及び第２通路４のなす角φとなる。一方、スリット２の壁面と線条材１０５との間の摩擦係数をμとすると、外力が作用しても摩擦によって線条材１０５がスリット２内を移動しない外力の最大傾斜角、すなわち摩擦角は、
μ＝ｔａｎθ （１）
を満たすθとなる。したがって、第１通路３及び第２通路４の交叉角φを
φ≦θ （２）
と設定すると、スリット２内のいずれの通路においても線条材１０５の移動が阻止される。
【００１９】
但し、第１通路３または第２通路４のいずれか一方で線条材１０５の移動が阻止されれば線条材１０５が支持部材１から脱離しないため、次のように交叉角φを設定することもできる。図４に示すように、例えば第１通路３及び第２通路４の法線と各々角度α及びβで交叉する外力Ｆが、線条材１０５に作用していると仮定する。この場合、第１通路３及び第２通路４の交叉角φは平面幾何の性質から
φ＝α＋β （３）
を満たす。そして、第１または第２通路３，４での外力Ｆによる線条材１０５の移動が阻止されるためには、αまたはβが摩擦角θより小さくなるように、すなわち、
α≦θまたはβ≦θ （４）
を満たすように交叉角φを設定すればよい。
【００２０】
ここで、α＝０とすると式（２）及び（３）からβ＝φ≦θとなる。同様に、β＝０とすると、α＝φ≦θとなる。これより、交叉角φのとり得る最大値は２θとなり、
φ≦２θ （５）
を満たすように交叉角φを設定すればよいことになる。したがって、式（１）及び（５）より、
φ≦２ｔａｎ^-1μ （６）
となるように交叉角φを設定することで、どの方向から外力が作用しても第１または第２通路３，４内のいずれか一方で、線条材１０５の移動が必ず阻止され、支持部材１から脱離するのを防止することができる。
【００２１】
例えば図４の例では、第２通路４において外力Ｆが摩擦角θより大きい角度βで線条材１０５に作用するため線条材１０５が移動してしまうが、第１通路３では角度αが摩擦角θより小さいため線条材１０５の移動が阻止され、支持部材１から脱離しないようになっている。但し、外力の作用する方向が予め分かっている場合には、いずれか一方の通路３，４の法線と、外力とのなす角が摩擦角θより小さくなるように交叉角φを設定しておけばよく、こうすることで、交叉角φをより広い範囲で設定することができる。
【００２２】
さらに、スリット２には、例えば図５（ａ）に示すように、線条材１０５が弾性変形することによって通過可能な挟窄部７を設けてもよい。そして、線条材１０５を取り付ける際に、線条材１０５を径方向に弾性変形させてこの挟窄部７を通過させておくと、スリット２内における線条材１０５の移動が制限され、支持部材１から脱離するのをより確実に防止することができる。この挟窄部７は、同図に示すようにスリット２内の一部分に設けてもよいし、或いは第１通路３全体に設け、第１通路３の幅が第２通路４より狭くなるように構成してもよい。
【００２３】
また、上記挟窄部７が形成された支持部材１を、例えば弾性変形可能な金属、プラスチック、ゴム等で構成する場合には、線条材１０５を取り付ける際に、この支持部材１を弾性変形させることで挟窄部７を通過させるようにしてもよい。
【００２４】
また、図５（ｂ）に示すように、スリット２内の一部に凹凸（高摩擦部）８を設け、線条材１０５とスリット２の壁面との間に生ずる摩擦力を大きくするようにして、線条材１０５の移動を制限してもよい。或いは、線条材１０５との間に大きい摩擦力を発生させる部材、例えばゴム等をスリット２の壁面に貼り付けてもよい。
【００２５】
上記実施形態では、スリット２を２方向に延びる通路を連結することで構成しているが、これに限定されるものではなく、要するにスリット２の開口部から延びる通路（開口近傍部分）に対して異なる方向に延びる通路（曲折部分）を、スリット２内のいずれかの部分で開口近傍部分より奥に設けていればよい。
【００２６】
また、３以上の異なる方向に延びる通路を連結することでスリット２を構成してもよい。このように、多数の方向に延びる通路を連結することで、例えば振動等により多方向からの外力を受ける場合であっても、線条材１０５が支持部材１から脱離するのを防止することができる。また、スリット２を曲線状の通路で構成する場合には、上記Ｓ字形に限定されるものではなく、異なる多数の方向に凸となる曲線状通路を連結してもよい。或いは、異なる方向に延びる直線状通路と曲線状通路とを混在させるようにスリット２を構成してもよい。
【００２７】
また、上記実施形態では、支持部材１の端縁からスリット２を形成し、線条材１０５をスリット２に挿入して大径部１０７を係止させているが、例えば、支持部材１に孔を形成するとともに、この孔に連続するスリットを形成して線条材を取り付けるようにしてもよい。以下、本発明の第２実施形態について説明する。
【００２８】
本実施形態の支持構造では、図６（ａ）に示すように、支持部材１に切欠部としての孔９が形成されるとともに、この孔９に連続し、線条材１０５が挿入可能なスリット１０が形成されている。このスリット１０は、孔９と連続する切欠近傍部分である第１通路１１と、この第１通路１１の奥端に連続する曲折部分として形成される第２通路１２とから構成されている。これら第１通路１１及び第２通路１２は、９０度より小さい鋭角をなして交叉している。
【００２９】
上記孔９は、線条材１０５の端部に設けられている大径部１０７が挿通可能な大きさとなっており、線条材１０５を支持部材１に取り付ける際には、大径部１０７を孔９に挿通した後、線条材１０５をスリット２に沿って第２通路の奥端まで挿入する。そして、線条材１０５に作用する張力により、大径部１０７が支持部材１に係止して、線条材１０５が支持部材１に保持される。
【００３０】
以上のように、本実施形態によれば、上記第１実施形態と同様に、線条材１０５の支持部材１からの脱離を防止できるほか、スリット１０を形成する場所が支持部材１の端縁近傍に限られず、端縁から離れた中間部分に形成することができるため、本発明の支持構造をより広範囲に活用することができる。また、スリット１０の形状は上記したものに限定されるものではなく、第１実施形態で示した種々の形状にすることができる。
【００３１】
なお、本実施形態では、支持部材１に形成される孔９が本発明の切欠部を構成しているが、これ以外に、例えば図６（ｂ）に示すように、支持部材１の端縁に形成される凹陥部１３としてもよい。
【００３２】
上記各実施形態では、線条材１０５が支持される支持部材１を板状の部材で構成しているが、これに限定されるものではなく、スリット２が形成できる部材であれば、例えば厚みのあるブロック状の部材であってもよい。
【００３３】
次に、本発明に係る支持構造の第３実施形態を電子鍵盤楽器の操作機構に適用した例について図面を参照しつつ説明する。図７、図８，図９は、各々電子ピアノ用鍵盤装置の平面図、右側面図、左側面図、図１０は操作機構の概略構成を示す斜視図、図１１は操作機構の作動状態を示す正面図である。図７から図９においては、鍵盤装置の演奏者側を前方、その反対側を後方と称する。
【００３４】
図７から図９に示すように、この鍵盤装置は、鍵全体が、鍵盤フレーム２０に支持され、鍵盤フレーム２０は、棚板２３に支持されている。鍵２２は、白鍵及び黒鍵からなっており、各鍵２２は、鍵盤フレーム２０の後方で鍵並び方向に延びる支持部２７により、該支持部との接触点付近の回動中心Ｒ２０の回りに上下方向に回動可能に支持されている。鍵２２の下側では、可動部材３０が鍵盤フレーム２０により支持されている。
【００３５】
この可動部材３０は、全体として前後方向にほぼ水平に延びており、鍵盤フレーム２０の前寄りの位置に立設された支持片２４及びこれを受け入れる凹部３１により、該支持片２４の先端部を回動中心Ｒ３０として回動する。これら支持片２４先端部及び凹部３１の係合状態を保持するために、Ｓ字状ばね４１の一端部が可動部材３０における凹部３１の背面側に設けられ両側部に形成した凹部からなるばね係止部３２を押圧している。
【００３６】
このばね係止部３２は、可動部材３０の厚さ方向に一定幅を有したリブで形成され、ばね係止部３２内における該リブの幅方向中央部に薄板部が鉛直に延びている。該ばね係止部３２に係合するＳ字状ばね４１の端部は中央にスリットを有した二股になっており、そのスリットに前記薄板部を挿入させて係合している。
【００３７】
ばね４１の中間部は鍵盤フレーム２０上部の前後方向ほぼ中央のばね通し孔４１１の縁部を押圧して接しており、ばね４１の他端部は、鍵後方下部のばね受け部を押圧するように構成されている。これにより、Ｓ字状ばね４１は、ばね係止部３２の位置で、可動部材３０を支持片２４先端部に押しつけると共に可動部材３０における回動中心Ｒ３０より後方部分を押し下げるように作用している。
【００３８】
可動部材３０は、前端部が鍵２２の垂下片２１の下端部に接しており、鍵２２の押鍵により該鍵２２と連動して回動する。可動部材３０前端下方付近には、スイッチ基板４２が鍵盤フレーム２０により支持され、該基板上にはドーム型のゴムで形成された鍵スイッチ４３が固定されている。可動部材３０の前部下面には、これら導通用部材４２，４３に対応する位置で下方に延びる一対の脚部を備えたスイッチ駆動部３３が設けられている。これらスイッチ駆動部３３，スイッチ基板４２及び鍵スイッチ４３は、鍵スイッチ内の２つの接点距離の相違による押鍵時の導通開始時間差を利用して押鍵速度を感知する押鍵スイッチを構成している。
【００３９】
可動部材３０は、鍵盤フレーム２０後部まで延び、休止位置（非押鍵状態）において、鍵盤フレーム２０上に固定されたフェルト製ストッパ部材２５により、後端部付近を支持されている。鍵２２が押鍵されたとき、可動部材３０は、図８に実線で示す休止位置から一点鎖線で示す押鍵位置に移動する。鍵盤フレーム２０における鍵２２の直ぐ後方には、ストッパ部材２６が保持されており、押鍵位置に至った可動部材３０をストップさせる役割を果たす。
【００４０】
このストッパ部材２６は、緩衝用フェルト２６ａを保護シート２６ｂで覆い、可動部材３０の後端部が、保護シート２６ｂを介して緩衝用フェルト２６ａを押圧するようにされている。緩衝用フェルト２６ａは、可動部材３０後端部の衝突に対する緩衝作用と、奏者の手指に対する確実な停止感とを与えるように、通常は堅さの異なるフェルトを重ねて構成される。可動部材３０は、前部から回動中心Ｒ３０付近までをプラスチック製とされ、その後部から金属棒が延びるように形成されており、後方へ長く延びた金属棒の質量により、押鍵時の慣性抵抗を生じさせる。
【００４１】
鍵盤フレーム２０の後部には、押鍵による押圧力を感知して発音を制御するいわゆるアフタータッチコントロール用の操作機構５０が設けられている。図１０に示すように、この操作機構５０は、全体的には、２本の張設材（線条材）５１，５２を鍵盤の両側で支持した構造となっており、これら張設材５１，５２の取付に本発明の支持構造が適用されている。
【００４２】
同図に示すように、２本の張設材５１，５２中、一方の張設材５１は、センシング用のものであり、ストッパ部材２６の緩衝用フェルト２６ａと保護シート２６ｂとの間に保持されて鍵盤装置の鍵並び方向に延びている。他方の張設材５２は、外乱要因の検知用張設材５１への影響を解消乃至低減するために設けられた補償用のためのものである。この補償用張設材５２は、可動部材３０に接しないように、ストッパ部材２６から僅かに離れた位置で、検知用張設材５１と平行に延びている。
【００４３】
図９に示すように、鍵盤列の左端外側には、鍵盤フレーム２０に支持された張設部６０が設けられている。張設部６０は、鍵盤フレーム２０に固定された保持部材６１と、該保持部材５３に取り付けられた取付け用板ばね６２とを備えている。この取付け用板ばね６２は、保持部材６１から後方へ延びた後、折り返されてＶ字状をなし、その自由端に小溝６３が形成され、検知用張設材５１及び補償用張設材５２の各一端部を引っ張るように支持している。
【００４４】
図８に示すように、鍵盤列の右端外側には、鍵盤フレーム２０に支持された検知部７０が設けられている。検知部７０は、検知用回路基板７１から検知用板ばね７２が延びた構造を有している。検知用板ばね７２は、基端部を回路基板７１にねじ７８により固定され、先端部には小溝７６が形成されて検知用張設材５１の端部を引っ張るように支持している。検知用板ばね７２の基端部寄りには歪みセンサ７３が貼着されている。この例では、歪みセンサ７３は、ピエゾ素子を用いて構成されている。回路基板７１には、歪みセンサ７３からの出力信号を検出する回路（図示を省略）及びその微調整のための調整素子７４が設けられている。該回路はさらに、図外のアフタータッチコントローラに接続されている。鍵盤列右側における補償用張設材５２の端部は、鍵盤フレーム２０の後端部に設けられたＡＢＳ樹脂製の固定部７５の小溝７９に固定的に支持されている。
【００４５】
本実施形態では、上記した取り付け用板ばね６２、検知用板ばね７２，及び固定部７５が本発明における支持部材を構成し、これらに形成された小溝６３，７６、７９がスリットを構成している。各小溝６３，７６、７９は、第１実施形態における図２（ａ）のようにＴ字形に形成されている。そして、張設材５１，５２は各小溝６３，７６、７９の奥端まで挿入され、その両端部に形成された大径部５７，５８により板ばね６２，７２及び固定部７５に係止されている。これにより、張設材５１，５２が小溝６３，７６、７９から抜け出て板ばね等から脱離するのを防止している。
【００４６】
また、操作機構５０においては、さらに以下のような設定がなされている。取付け用板ばね６２は、検知用板ばね７２よりばね力を強くされ、補償用張設材５２は、検知用張設材５１より引張り剛性を高くされている。すなわち、補償用張設材５２は、右端を鍵盤フレーム２０に固定的に支持され、左端を取付け用板ばね６２により引っ張られて、所定の延び状態となる。これに対し、検知用張設材５１は、取付け用板ばね６２を共通の保持部として補償用張設材５２と共に左端が保持され、右端は検知用板ばね７２を撓ませてその自由端に保持されている。したがって、補償用張設材５２を引っ張った状態で左端の位置を安定にするために、取付け用板ばね６２のばね力を強くし、検知用板ばね７２が大きく撓まないように、補償用張設材５２の引張り剛性が高くされる。
【００４７】
次に、この鍵盤装置の作動について説明する。図８は、押鍵前の休止状態を示している。この状態から押鍵をすると、鍵２２が回動中心Ｒ２０を中心として下方へ回動し、垂下片２１が可動部材３０を押し下げる。これにより、可動部材３０は、回動中心Ｒ３０を中心に回動し、スイッチ駆動部３３は、鍵スイッチ４３に向かって下降して行く。そして、鍵２２のスイッチ駆動部３３は、鍵スイッチ４３と接し、押鍵スイッチをオンにし、発音機構を動作させて発音がなされる。この間、可動部材３０は、回動中心Ｒ３０より後方部分を上昇させる。そして、スイッチ駆動部３３が鍵スイッチ４３に接した直後に可動部材３０の後端部がストッパ部材２６に当接し、これにより可動部材３０及び鍵２２の回動が停止させられる。
【００４８】
操作機構５０は、次のように作用する。押鍵状態で鍵の押圧力を増減させると、可動部材３０の後端部はストッパ部材２６、特にその緩衝用フェルト２６ａの撓み量を変化させる（図１１参照）。検知用張設材５１は、ストッパ部材２６の緩衝用フェルト２６ａと保護シート２６ｂとの間に保持されている。したがって、緩衝用フェルト２６ａの撓み量が変化すると、その撓みに伴う検知用張設材５１の蛇行量も変化する。蛇行量が増加すると、検知用張設材５１の端部間の距離は縮まり、これに伴って、検知用板ばね７２の撓みが増す。したがって、歪みセンサ７３の出力が増加する。この出力変化をピックアップすることにより、押鍵後の鍵への押圧力の変化を検出することができ、これに応じて音量、音質等を変化させれば、アフタータッチコントロールを行なうことができる。
【００４９】
以上のように、本実施形態によれば、種々の方向から外力が作用した場合であっても、張設材５１，５２が取付け用板ばね６２、検知用板ばね７２、及び固定部７５から脱離するのを防止することができる。特に、上記した操作機構における検知用張設材５１は、可動部材３０により種々の位置から押圧され、しかも、その一端部が取り付け用板ばね６２によって張力を受けているため、検知用張設材５１の両端部には、種々の方向の外力が作用する。したがって、検知用張設材５１の取付に本実施形態の支持構造を適用すると、多方向に外力に対しても検知用張設材５１の脱離を防止でき、特に有利である。
【００５０】
また、小溝６３，７６，７９の形状は上記したＴ字形に限定されるものではなく、第１実施形態に示した種々のものを適用することができる。
【００５１】
【発明の効果】
以上の説明から明らかなように、本発明の支持構造によれば、支持部材の端縁に開くスリットに、支持部材端縁への開口部に通じる開口近傍部分と、この開口近傍部分より奥にその延在方向に対して異なる方向に延びる曲折部分とを形成しているため、次の効果を得ることができる。
【００５２】
すなわち、線条材に対し曲折部分の延在方向に外力が作用しても、曲折部分とは異なる方向に延びる開口近傍部分により線条材の移動が阻止される。したがって、線条材が支持部材から脱離するのを防止することができる。
【００５３】
また、スリットに、開口近傍部分と曲折部分との曲折点から、この曲折点を超えて延びる延長部分を設けてもよく、或いは、曲折部分を曲線状に形成してもよい。このようにしても、上記と同様に、線条材が支持部材から脱離するのを防止することができる。特に、曲折部分を曲線状に形成すると、スリットの形成方向が連続的に変化するため、線条材の脱離をより効果的に防止することができる。
【００５４】
また、線条材に作用する外力における開口近傍部分及び曲折部分を含む平面に沿う分力と、開口近傍部分及び曲折部分のいずれか一方における法線とのなす角が、スリットの壁面と前記線条材との間の摩擦角よりも小さくなるように、開口近傍部分と曲折部分との交叉角を設定してもよい。このようにすると、開口近傍部分または曲折部分のいずれか一方で、摩擦力により線条材の移動が阻止されるため、線条材の支持部材からの脱離をより確実に防止することができる。ここで、交叉角を、摩擦角の２倍より小さくなるように設定すると、開口近傍部分及び曲折部分のいずれかの部分で摩擦力により線条材の移動が阻止されるため、線条材の脱離をさらに確実に防止することができる。
【００５５】
また、前述のスリットの一部に、支持部材または線条材の弾性変形により線条材が通過可能な挟窄部を形成したり、或いはスリットの壁面に、線条材との間に大きい摩擦力を発生させる高摩擦部を形成してもよく、こうすることで、線条材のスリット内における移動が制限され、線条材が支持部材から脱離するのをより確実に防止することができる。
【００５６】
さらに、支持部材に線条材の大径部が挿通可能な切欠部を形成するとともに、この切欠部に連続するスリットを設け、このスリットに、切欠部に通じる切欠近傍部分と、この切欠近傍部分より奥にその延在方向に対して異なる方向に延びる曲折部分とを形成することにより、上記と同様に、線条材が支持部材から離脱するのを防止することができる。この場合、支持部材に大径部が挿通可能な切欠部を設けているため、支持部材の端縁近傍に限られず、例えば支持部材の中間部分においても線条材を取り付けることができる。
【図面の簡単な説明】
【図１】本発明に係る支持構造の一例を示す正面図である。
【図２】本発明に係る支持構造の他の例を示す正面図である。
【図３】本発明に係る支持構造のさらに他の例を示す正面図である。
【図４】本発明に係る支持構造のさらに他の例を示す正面図である。
【図５】本発明に係る支持構造のさらに他の例を示す正面図である。
【図６】本発明に係る支持構造のさらに他の例を示す図である。
【図７】本発明に係る支持構造を電子ピアノの鍵盤装置部分に適用した例を示す平面図である。
【図８】図７の鍵盤装置部分の右側面図である。
【図９】図７の鍵盤装置部分の左側面図である。
【図１０】図７の鍵盤装置における操作機構を概略的に示す斜視図である。
【図１１】図１０における操作機構の作動状態を示す正面図である。
【図１２】従来の支持構造の例を示す斜視図である。
【図１３】図１２の断面図である。
【符号の説明】
１支持部材
２スリット
３第１通路（開口近傍部分）
４第２通路（曲折部分）
５曲折点
６延長部分
７挟窄部
８凹凸（高摩擦部）
９孔（切欠部）
１１第１通路（切欠近傍部分）
１２第２通路（曲折部分）
１３凹陥部（切欠部）
５１，５２張設材（線条材）
６２取り付け用板ばね（支持部材）
７２検知用板ばね（支持部材）
７５固定部（支持部材）
６３，７６，７９小溝（スリット）
１０５線条材
１０７大径部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure for supporting a linear member such as a thread, a string, and a wire on a support member.
[0002]
[Prior art]
Conventionally, when supporting an end portion of a wire rod, the following support structure is often employed because the mounting operation is simple and the cost is low. As shown in FIG. 12, in this support structure, the plate-like support member 101 is formed with a slit 103 that opens at the edge thereof, and a large-diameter portion 107 that is larger than the width of the slit 103 at the end portion of the linear member 105. Is provided. Then, the wire rod 105 is inserted into the slit 103 and the large diameter portion 107 is locked to the support member 101.
[0003]
[Problems to be solved by the invention]
However, in such a support structure, as shown in FIG. 13A, for example, when an external force A acts on the wire member 105 toward the opening end of the slit 103, the wire member 105 follows the slit 103. And may be detached from the slit 103.
[0004]
Further, as shown in FIG. 13B, when an external force B or C having a component force along the slit 103 is applied and the component force exceeds the frictional force between the wire 105 and the wall surface of the slit 103. There is a possibility that the wire 105 is detached from the slit 103 only by an external force acting in one direction.
[0005]
At this time, for example, if the filament 105 is made of a conductor, the detached filament 105 may come into contact with another metal member and cause a short circuit. Alternatively, the detached wire rod 105 may be caught in a movable member disposed in the vicinity thereof, thereby hindering the operation of the machine.
[0006]
The present invention has been made to solve the above problems, and an object thereof is to provide a support structure that can effectively prevent the filament material from being detached from the support member with a simple configuration.
[0007]
[Means for Solving the Problems]
  In order to achieve the above-mentioned object, the present invention provides a support structure for a linear member with respect to a support member, wherein the support member is formed with a slit opened at an edge of the support member, and the linear member is wider than the slit. A large large-diameter portion is provided, and the linear member is inserted into the slit so that the large-diameter portion is locked. The slit extends in the vicinity of the opening leading to the opening to the support member edge. A bending portion extending in a different direction with respect to the present direction is formed behind the opening vicinity portion, and a component force along a plane including the opening vicinity portion and the bending portion in the external force acting on the linear member, and the opening The angle formed between the vicinity of the opening and the bent portion is set so that the angle formed with the normal line in either the adjacent portion or the bent portion is smaller than the friction angle between the wall surface of the slit and the line material. With the feature that the corner is set Support structure that,
  In addition, the support structure of the linear member with respect to the support member, the slit formed in the end of the support member is formed in the support member, the large diameter portion wider than the slit is provided in the linear member, the slit The wire rod is inserted into a state where the large-diameter portion is locked, and the slit has a direction different from the extending direction of the vicinity of the opening leading to the opening to the support member edge. A support structure characterized in that an extended bent portion is formed at the back of the vicinity of the opening, and the bent portion is formed in a curved shape;
  In addition, the support structure of the linear member with respect to the support member, the slit formed in the end of the support member is formed in the support member, the large diameter portion wider than the slit is provided in the linear member, the slit The wire rod is inserted into a state where the large-diameter portion is locked, and the slit has a direction different from the extending direction of the vicinity of the opening leading to the opening to the support member edge. The extending bent portion is formed deeper than the vicinity of the opening, and at least a portion of the slit is formed with a constricted portion that can be passed by elastic deformation of the support member or the linear member. Support structure,
  In addition, a plurality of keys, a keyboard frame that supports the entire key, a movable member that is supported by the keyboard frame and interlocks with the key, a linear member that extends in the key arrangement direction, and a key arrangement in the keyboard frame And a support member mounted with a sensor that detects a change in the distance between the end portions of the filament material when the key is pressed, and a movable member that is interlocked with the key by pressing the key presses the filament material. A structure for supporting a line material for after-touch detection for a keyboard device configured to be configured such that a slit opened at an edge of the support member is formed in the support member, and the line material has a width wider than the slit. A large large-diameter portion is provided, and the linear member is inserted into the slit so that the large-diameter portion is locked. The slit extends in the vicinity of the opening leading to the opening to the support member edge. A bent part extending in a different direction with respect to the current direction Forming the opening portion near the back, and constitutes the support member by an elastic member in a direction to generate a tension to the filament material, characterized in that so as to urge the large diameter portion support structureIs to provide.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a support structure showing a first embodiment of the present invention.
[0010]
In the following, the same or similar parts may be denoted by the same reference numerals and description thereof may be omitted.
[0011]
In the support structure of the present embodiment shown in FIG. 1, the wire material 105 is a thin string, and the support member 1 is configured by a leaf spring. The slit 2 formed in the support member 1 includes a first passage 3 that is a portion near the opening that opens at the end edge of the support member 1, and a second bent portion that is formed as a bent portion continuous to the inner end of the first passage 3. It comprises a passage 4. The first passage 3 and the second passage 4 intersect each other with an acute angle smaller than 90 degrees.
[0012]
When attaching the wire rod 105 to the support member 1, the wire rod 105 is pulled in the length direction or the wire rod 105 is slit 2 while the support member 1 is bent toward the wire rod 105. The first passage 3 and the second passage 4 are inserted in this order from the opening. Then, as shown in FIG. 1, the wire rod 105 is supported by the support member 1 by locking the large diameter portion 107 to the support member 1 in a state where the wire rod 105 is inserted to the far end of the second passage 4. Retained. At this time, the large-diameter portion 107 provided at the end of the wire rod 105 is urged by the support member 1 that is a leaf spring in a direction in which the wire rod 105 receives tension. Is firmly locked and the wire rod 105 can be reliably fixed.
[0013]
As described above, according to the present embodiment, the slit 2 formed in the support member 1 includes the first passage 3 that opens at the edge of the support member 1 and the second passage 4 that extends in a different direction. Therefore, the following effects can be obtained. That is, when an external force is applied to the wire material 105 in a direction along one of the passages, for example, the back end of the second passage 4, the wire material 105 is moved in that direction. The movement is prevented in the direction along the first passage 3 extending in a different direction. Therefore, it is possible to prevent the filament material 105 from being detached from the support member 1 against an external force acting in one direction.
[0014]
Here, the shape of the slit 2 is not limited to that described above, and can be various shapes as shown below.
[0015]
For example, as shown in FIG. 2A, the first passage 3 and the second passage 4 are formed via the bending point 5, and the extension portion 6 extending from the bending point 5 in the opposite direction to the second passage 4 is provided. You may comprise. In this case, for example, when an external force in the X direction of FIG. Therefore, it is possible to prevent the filament material 105 from being detached from the support member 1.
[0016]
Alternatively, as shown in FIG. 2B, the slit 2 may be formed in an S shape. If it does in this way, since the formation direction of the slit 2 changes continuously, the effect equivalent to the case where the several channel | path extended in a different direction is connected can be acquired. Therefore, the line material 105 is detached from the support member 1 with respect to the external force acting from various directions except when the external force acts in a specific direction and order so as to cause the movement along the S shape. Can be prevented.
[0017]
By the way, since a frictional force acts between the wall surface of the slit 2 and the wire rod 105, it is more reliable to set the angle formed between the first passage 3 and the second passage 4 by using this frictional force. Detachment of the wire rod 105 can be prevented.
[0018]
As shown in FIG. 3, for example, it is assumed that the first passage 3 and the second passage 4 intersect at an angle φ. Here, when the frictional force is not taken into consideration, in the first passage 3, when an external force is applied from the range of the angle γ, the linear member 105 moves in the passage toward the opening side, while in the second passage 4, from the range of the angle δ. When an external force is applied, the wire rod 105 moves in the passage toward the opening. Therefore, as shown in the figure, the angle of the external force at which the wire 105 moves in any of the first and second passages 3 and 4 is an overlapping range of the angles γ and δ. This angle is an angle φ formed by the first passage 3 and the second passage 4 due to the plane geometry. On the other hand, when the friction coefficient between the wall surface of the slit 2 and the wire 105 is μ, even if an external force is applied, the maximum inclination angle of the external force at which the wire 105 does not move in the slit 2 due to friction, that is, the friction angle. Is
μ = tan θ (1)
Θ satisfying Therefore, the crossing angle φ of the first passage 3 and the second passage 4 is
φ ≦ θ (2)
Is set, the movement of the wire rod 105 is prevented in any passage in the slit 2.
[0019]
However, if the movement of the wire 105 is prevented in either the first passage 3 or the second passage 4, the wire 105 will not be detached from the support member 1, so the crossing angle φ is set as follows. You can also As shown in FIG. 4, for example, it is assumed that an external force F that intersects with the normal lines of the first passage 3 and the second passage 4 at angles α and β acts on the filament 105. In this case, the crossing angle φ of the first passage 3 and the second passage 4 is due to the plane geometry.
φ = α + β (3)
Meet. In order to prevent the movement of the wire rod 105 due to the external force F in the first or second passages 3 and 4, α or β is made smaller than the friction angle θ, that is,
α ≦ θ or β ≦ θ (4)
The crossing angle φ may be set so as to satisfy the above.
[0020]
Here, if α = 0, then β = φ ≦ θ from equations (2) and (3). Similarly, if β = 0, then α = φ ≦ θ. From this, the maximum value that the crossing angle φ can take is 2θ,
φ ≦ 2θ (5)
The crossing angle φ should be set so as to satisfy the above. Therefore, from the equations (1) and (5),
φ ≦ 2 tan^-1μ (6)
By setting the crossing angle φ so as to be, the movement of the wire 105 is surely prevented in any one of the first and second passages 3 and 4 regardless of the direction from which the external force is applied. The detachment from the member 1 can be prevented.
[0021]
For example, in the example of FIG. 4, the external force F acts on the linear material 105 at an angle β larger than the friction angle θ in the second passage 4, so that the linear material 105 moves. Since it is smaller than the friction angle θ, the movement of the wire rod 105 is prevented and it is prevented from being detached from the support member 1. However, when the direction in which the external force acts is known in advance, the crossing angle φ is set so that the angle formed by the normal of one of the passages 3 and 4 and the external force is smaller than the friction angle θ. The crossing angle φ can be set in a wider range by doing so.
[0022]
Furthermore, for example, as shown in FIG. 5A, the slit 2 may be provided with a constricted portion 7 that can be passed by elastic deformation of the wire material 105. When the wire rod 105 is attached, if the wire rod 105 is elastically deformed in the radial direction and allowed to pass through the constricted portion 7, the movement of the wire rod 105 in the slit 2 is restricted, and the support is supported. The detachment from the member 1 can be prevented more reliably. The constricted portion 7 may be provided in a part of the slit 2 as shown in the figure, or provided in the entire first passage 3 so that the width of the first passage 3 is narrower than that of the second passage 4. It may be configured.
[0023]
Further, when the support member 1 in which the narrowed portion 7 is formed is made of, for example, an elastically deformable metal, plastic, rubber, or the like, the support member 1 is elastically deformed when the linear member 105 is attached. By doing so, you may make it let the constriction part 7 pass.
[0024]
Further, as shown in FIG. 5 (b), an unevenness (high friction portion) 8 is provided in a part of the slit 2 to increase the frictional force generated between the wire 105 and the wall surface of the slit 2. Thus, the movement of the wire rod 105 may be restricted. Alternatively, a member that generates a large frictional force with the wire material 105, such as rubber, may be attached to the wall surface of the slit 2.
[0025]
In the above embodiment, the slit 2 is configured by connecting passages extending in two directions. However, the present invention is not limited to this, and in short, with respect to a passage extending from the opening of the slit 2 (portion vicinity). A passage (bent portion) extending in a different direction may be provided behind any portion near the opening at any portion in the slit 2.
[0026]
Further, the slit 2 may be configured by connecting three or more passages extending in different directions. In this way, by connecting the passages extending in many directions, it is possible to prevent the filament material 105 from being detached from the support member 1 even when receiving external force from multiple directions due to vibration or the like. Can do. Further, when the slit 2 is configured by a curved path, the slit path is not limited to the S shape, and curved paths that are convex in a number of different directions may be connected. Or you may comprise the slit 2 so that the linear channel | path and curved channel | path extended in a different direction may be mixed.
[0027]
Moreover, in the said embodiment, although the slit 2 is formed from the edge of the supporting member 1, and the linear material 105 is inserted in the slit 2 and the large diameter part 107 is latched, for example, a hole is formed in the supporting member 1. In addition, a slit continuous to the hole may be formed to attach the wire material. The second embodiment of the present invention will be described below.
[0028]
In the support structure of the present embodiment, as shown in FIG. 6A, a hole 9 as a notch is formed in the support member 1, and a slit that is continuous with the hole 9 and into which the wire 105 can be inserted. 10 is formed. The slit 10 includes a first passage 11 that is a portion near the notch that is continuous with the hole 9, and a second passage 12 that is formed as a bent portion that is continuous with the back end of the first passage 11. The first passage 11 and the second passage 12 intersect at an acute angle of less than 90 degrees.
[0029]
The hole 9 has such a size that the large-diameter portion 107 provided at the end of the wire rod 105 can be inserted, and when the wire rod 105 is attached to the support member 1, After passing through the hole 9, the wire rod 105 is inserted along the slit 2 to the far end of the second passage. Then, the large diameter portion 107 is locked to the support member 1 by the tension acting on the wire material 105, and the wire material 105 is held on the support member 1.
[0030]
As described above, according to the present embodiment, similarly to the first embodiment, the wire member 105 can be prevented from being detached from the support member 1, and the place where the slit 10 is formed is the end of the support member 1. The support structure of the present invention can be used in a wider range because it can be formed not only in the vicinity of the edge but also in an intermediate portion away from the edge. Further, the shape of the slit 10 is not limited to the above-described one, and can be various shapes shown in the first embodiment.
[0031]
In the present embodiment, the hole 9 formed in the support member 1 constitutes the notch of the present invention. In addition to this, for example, as shown in FIG. It is good also as the recessed part 13 formed in.
[0032]
In each said embodiment, although the supporting member 1 with which the filament 105 is supported is comprised by the plate-shaped member, it is not limited to this, If it is a member which can form the slit 2, for example, thickness It may be a block-shaped member.
[0033]
Next, an example in which the third embodiment of the support structure according to the present invention is applied to an operation mechanism of an electronic keyboard instrument will be described with reference to the drawings. 7, 8, and 9 are a plan view, a right side view, and a left side view of the keyboard device for an electronic piano, respectively, FIG. 10 is a perspective view showing a schematic configuration of the operation mechanism, and FIG. 11 shows an operating state of the operation mechanism. FIG. 7 to 9, the player side of the keyboard device is referred to as the front side, and the opposite side is referred to as the rear side.
[0034]
As shown in FIGS. 7 to 9, in this keyboard device, the entire key is supported by the keyboard frame 20, and the keyboard frame 20 is supported by the shelf plate 23. The key 22 is composed of a white key and a black key, and each key 22 is rotated around a rotation center R20 near a contact point with the support portion by a support portion 27 extending in the key arrangement direction behind the keyboard frame 20. Is supported so as to be rotatable in the vertical direction. Under the key 22, the movable member 30 is supported by the keyboard frame 20.
[0035]
The movable member 30 extends substantially horizontally in the front-rear direction as a whole, and the tip of the support piece 24 is formed by a support piece 24 standing on the front side of the keyboard frame 20 and a recess 31 for receiving the support piece 24. It rotates as a rotation center R30. In order to maintain the engagement state between the distal end portion of the support piece 24 and the recessed portion 31, a spring engagement comprising one end portion of the S-shaped spring 41 provided on the back side of the recessed portion 31 in the movable member 30 and formed on both side portions. The stop 32 is pressed.
[0036]
The spring locking portion 32 is formed of a rib having a constant width in the thickness direction of the movable member 30, and a thin plate portion extends vertically in the center portion of the rib in the width direction of the spring locking portion 32. The end portion of the S-shaped spring 41 that engages with the spring locking portion 32 has a bifurcated shape having a slit at the center, and the thin plate portion is inserted into the slit for engagement.
[0037]
The middle part of the spring 41 is in contact with the edge of the spring through hole 411 at the center of the keyboard frame 20 in the front-rear direction, and the other end of the spring 41 presses the spring receiving part at the lower rear part of the key. It is configured. As a result, the S-shaped spring 41 acts to press the movable member 30 against the distal end portion of the support piece 24 at the position of the spring locking portion 32 and push down the rear portion of the movable member 30 from the rotation center R30. .
[0038]
The movable member 30 has a front end in contact with the lower end of the hanging piece 21 of the key 22, and rotates in conjunction with the key 22 when the key 22 is depressed. A switch board 42 is supported by the keyboard frame 20 near the lower front end of the movable member 30, and a key switch 43 made of dome-shaped rubber is fixed on the board. On the lower surface of the front portion of the movable member 30, a switch drive unit 33 having a pair of legs extending downward at positions corresponding to the conductive members 42 and 43 is provided. The switch drive unit 33, the switch board 42, and the key switch 43 constitute a key pressing switch that senses the key pressing speed by using the conduction start time difference at the time of key pressing due to the difference in distance between the two contacts in the key switch. Yes.
[0039]
The movable member 30 extends to the rear portion of the keyboard frame 20 and is supported in the vicinity of the rear end portion by a felt stopper member 25 fixed on the keyboard frame 20 in the rest position (non-key-pressed state). When the key 22 is depressed, the movable member 30 moves from the rest position indicated by the solid line in FIG. 8 to the key depression position indicated by the alternate long and short dash line. A stopper member 26 is held immediately behind the key 22 in the keyboard frame 20 and serves to stop the movable member 30 that has reached the key pressing position.
[0040]
The stopper member 26 covers the buffer felt 26a with a protective sheet 26b, and the rear end portion of the movable member 30 presses the buffer felt 26a through the protective sheet 26b. The cushioning felt 26a is usually configured by overlapping felts having different stiffnesses so as to provide a buffering action against the collision of the rear end portion of the movable member 30 and a reliable stop feeling to the player's fingers. The movable member 30 is made of plastic from the front part to the vicinity of the rotation center R30, and is formed so that the metal bar extends from the rear part thereof. Causes resistance.
[0041]
An operation mechanism 50 for so-called after touch control is provided at the rear part of the keyboard frame 20 to control sound generation by detecting a pressing force generated by pressing a key. As shown in FIG. 10, the operation mechanism 50 has a structure in which two tension members (wire members) 51 and 52 are supported on both sides of the keyboard, and the tension members 51 and 52 are attached. The support structure of the present invention is applied to the above.
[0042]
As shown in the figure, of the two tension members 51, 52, one tension member 51 is for sensing, and is held between the buffer felt 26a and the protective sheet 26b of the stopper member 26 to be a keyboard device. It extends in the key arrangement direction. The other tension member 52 is for compensation provided to eliminate or reduce the influence of disturbance factors on the tension member 51 for detection. The compensation tension member 52 extends in parallel with the detection tension member 51 at a position slightly away from the stopper member 26 so as not to contact the movable member 30.
[0043]
As shown in FIG. 9, an extension portion 60 supported by the keyboard frame 20 is provided on the outer left end of the keyboard row. The tension portion 60 includes a holding member 61 fixed to the keyboard frame 20 and a mounting plate spring 62 attached to the holding member 53. The attachment leaf spring 62 extends rearward from the holding member 61 and is then folded back to form a V-shape. A small groove 63 is formed at the free end of each of the detection leaf springs 51 and the compensating tension member 52. Support to pull.
[0044]
As shown in FIG. 8, a detection unit 70 supported by the keyboard frame 20 is provided outside the right end of the keyboard row. The detection unit 70 has a structure in which a detection leaf spring 72 extends from the detection circuit board 71. The detection plate spring 72 is fixed to the circuit board 71 with a screw 78 at the base end, and a small groove 76 is formed at the front end to support the end of the detection tension member 51. A strain sensor 73 is attached near the base end of the detection leaf spring 72. In this example, the strain sensor 73 is configured using a piezo element. The circuit board 71 is provided with a circuit (not shown) for detecting an output signal from the strain sensor 73 and an adjustment element 74 for fine adjustment thereof. The circuit is further connected to an aftertouch controller (not shown). The end portion of the compensating tension member 52 on the right side of the keyboard row is fixedly supported by a small groove 79 of a fixing portion 75 made of ABS resin provided at the rear end portion of the keyboard frame 20.
[0045]
In the present embodiment, the mounting leaf spring 62, the detection leaf spring 72, and the fixing portion 75 described above constitute a support member in the present invention, and the small grooves 63, 76, and 79 formed in these constitute a slit. Yes. Each of the small grooves 63, 76 and 79 is formed in a T shape as shown in FIG. 2A in the first embodiment. The tension members 51 and 52 are inserted to the back ends of the small grooves 63, 76 and 79, and are locked to the leaf springs 62 and 72 and the fixing portion 75 by the large diameter portions 57 and 58 formed at both ends thereof. . This prevents the tension members 51, 52 from coming out of the small grooves 63, 76, 79 and detaching from the leaf spring or the like.
[0046]
In the operation mechanism 50, the following settings are further made. The attachment leaf spring 62 is stronger in spring force than the detection leaf spring 72, and the compensation tension member 52 is higher in tensile rigidity than the detection tension member 51. In other words, the compensation tension member 52 is fixedly supported at the right end by the keyboard frame 20, and the left end is pulled by the mounting plate spring 62, and is in a predetermined extension state. On the other hand, the detection tension member 51 is held at the left end together with the compensation tension member 52 with the mounting plate spring 62 as a common holding portion, and the right end is held at its free end by bending the detection plate spring 72. . Therefore, in order to stabilize the position of the left end in a state in which the compensation tension member 52 is pulled, the spring force of the attachment leaf spring 62 is increased so that the detection leaf spring 72 does not bend greatly. The tensile rigidity of is increased.
[0047]
Next, the operation of this keyboard apparatus will be described. FIG. 8 shows a pause state before key depression. When the key is pressed from this state, the key 22 rotates downward about the rotation center R20, and the hanging piece 21 pushes down the movable member 30. As a result, the movable member 30 rotates about the rotation center R <b> 30, and the switch drive unit 33 moves downward toward the key switch 43. The switch drive unit 33 of the key 22 is in contact with the key switch 43, turns on the key depression switch, operates the sound generation mechanism, and generates sound. During this time, the movable member 30 raises the rear part from the rotation center R30. Immediately after the switch drive unit 33 comes into contact with the key switch 43, the rear end portion of the movable member 30 comes into contact with the stopper member 26, thereby stopping the rotation of the movable member 30 and the key 22.
[0048]
The operation mechanism 50 operates as follows. When the key pressing force is increased or decreased in the key pressing state, the rear end portion of the movable member 30 changes the amount of bending of the stopper member 26, particularly the buffer felt 26a (see FIG. 11). The detecting tension member 51 is held between the buffer felt 26a of the stopper member 26 and the protective sheet 26b. Therefore, when the amount of bending of the buffer felt 26a changes, the amount of meandering of the detection tension member 51 accompanying the bending also changes. When the amount of meandering increases, the distance between the ends of the detection tension member 51 decreases, and accordingly, the deflection of the detection leaf spring 72 increases. Therefore, the output of the strain sensor 73 increases. By picking up this output change, it is possible to detect a change in the pressing force applied to the key after the key is pressed, and after touch control can be performed if the volume, sound quality, etc. are changed accordingly.
[0049]
As described above, according to the present embodiment, the tension members 51 and 52 are detached from the attachment leaf spring 62, the detection leaf spring 72, and the fixing portion 75 even when external force is applied from various directions. Can be prevented. In particular, the detection tension member 51 in the operation mechanism described above is pressed from various positions by the movable member 30, and one end of the tension member is subjected to tension by the mounting plate spring 62. External forces in various directions act on the. Therefore, when the support structure of this embodiment is applied to the attachment of the detection tension member 51, it is possible to prevent the detection tension member 51 from being detached even from an external force in multiple directions, which is particularly advantageous.
[0050]
Further, the shape of the small grooves 63, 76, 79 is not limited to the above-mentioned T-shape, and various types shown in the first embodiment can be applied.
[0051]
【The invention's effect】
As is clear from the above description, according to the support structure of the present invention, the slit that opens at the end edge of the support member, the vicinity of the opening that leads to the opening to the support member edge, and the back of the opening vicinity. Since the bent portion extending in a direction different from the extending direction is formed, the following effects can be obtained.
[0052]
That is, even if an external force acts on the wire material in the extending direction of the bent portion, the movement of the wire material is prevented by the vicinity of the opening extending in a direction different from the bent portion. Accordingly, it is possible to prevent the filament material from being detached from the support member.
[0053]
Further, the slit may be provided with an extending portion extending beyond the bending point from the bending point between the opening vicinity portion and the bending portion, or the bending portion may be formed in a curved shape. Even if it does in this way, it can prevent that a filament material remove | deviates from a support member similarly to the above. In particular, when the bent portion is formed in a curved shape, the slit forming direction changes continuously, so that the strip material can be more effectively prevented from being detached.
[0054]
Further, the angle formed by the component force along the plane including the opening vicinity portion and the bent portion in the external force acting on the wire rod and the normal line in either the opening vicinity portion or the bent portion is the slit wall surface and the line. You may set the crossing angle of an opening vicinity part and a bending part so that it may become smaller than the friction angle between strips. If it does in this way, since movement of a line material will be blocked by frictional force in any one of the opening neighborhood part or a bent part, detachment from a support member of a line material can be prevented more certainly. . Here, if the crossing angle is set to be smaller than twice the friction angle, the movement of the wire rod is prevented by the frictional force in either the vicinity of the opening or the bent portion. Desorption can be prevented more reliably.
[0055]
In addition, a constricted portion through which the filament material can pass by elastic deformation of the support member or the filament material is formed in a part of the slit, or a large friction between the slit wall surface and the filament material. A high-friction portion that generates force may be formed, and in this way, movement of the wire rod in the slit is limited, and it is possible to more reliably prevent the wire rod from being detached from the support member. it can.
[0056]
Further, the support member is formed with a notch portion through which the large-diameter portion of the wire rod can be inserted, and a slit continuous to the notch portion is provided. By forming a bent portion extending in a different direction with respect to the extending direction at the back, it is possible to prevent the filament material from being detached from the support member in the same manner as described above. In this case, since the support member is provided with a notch portion through which the large-diameter portion can be inserted, the wire member is not limited to the vicinity of the end edge of the support member, and for example, the filament material can be attached to an intermediate portion of the support member.
[Brief description of the drawings]
FIG. 1 is a front view showing an example of a support structure according to the present invention.
FIG. 2 is a front view showing another example of a support structure according to the present invention.
FIG. 3 is a front view showing still another example of the support structure according to the present invention.
FIG. 4 is a front view showing still another example of the support structure according to the present invention.
FIG. 5 is a front view showing still another example of the support structure according to the present invention.
FIG. 6 is a view showing still another example of the support structure according to the present invention.
FIG. 7 is a plan view showing an example in which the support structure according to the present invention is applied to a keyboard device portion of an electronic piano.
8 is a right side view of the keyboard device portion of FIG. 7;
FIG. 9 is a left side view of the keyboard device portion of FIG. 7;
10 is a perspective view schematically showing an operation mechanism in the keyboard device of FIG. 7. FIG.
11 is a front view showing an operating state of the operation mechanism in FIG. 10. FIG.
FIG. 12 is a perspective view showing an example of a conventional support structure.
13 is a cross-sectional view of FIG.
[Explanation of symbols]
1 Support member
2 slits
3 1st passage (part near opening)
4 Second passage (curved part)
5 Turning point
6 Extension
7 stenosis
8 Unevenness (high friction part)
9 hole (notch)
11 First passage (near the notch)
12 Second passage (curved part)
13 Indentation (notch)
51, 52 Tension material (wire material)
62 Leaf spring for mounting (support member)
72 Detection leaf spring (supporting member)
75 Fixed part (support member)
63, 76, 79 Small groove (slit)
105 Wire material
107 Large diameter part

Claims

It is a support structure of the wire rod for the support member,
A slit opened at the edge of the support member is formed in the support member, a large-diameter portion having a width wider than the slit is provided in the linear member, and the linear member is inserted into the slit to engage the large-diameter portion. And stop
In the slit, a bent portion extending in a different direction with respect to the extending direction of the opening vicinity portion leading to the opening portion to the edge of the support member is formed behind the opening vicinity portion,
An angle formed by a component force along a plane including the opening vicinity portion and the bent portion in the external force acting on the wire rod, and a normal line in any one of the opening vicinity portion and the bent portion,
The support structure is characterized in that an angle formed by the vicinity of the opening and the bent portion is set so as to be smaller than a friction angle between the wall surface of the slit and the linear member.

The support structure according to claim 1, wherein an angle formed between the opening vicinity portion and the bent portion is set to be smaller than twice the friction angle.

It is a support structure of the wire rod for the support member,
A slit opened at the edge of the support member is formed in the support member, a large-diameter portion having a width wider than the slit is provided in the linear member, and the linear member is inserted into the slit to engage the large-diameter portion. And stop
In the slit, a bent portion extending in a different direction with respect to the extending direction of the opening vicinity portion leading to the opening portion to the edge of the support member is formed behind the opening vicinity portion,
The support structure, wherein the bent portion is formed in a curved shape.

It is a support structure of the wire rod for the support member,
A slit opened at the edge of the support member is formed in the support member, a large-diameter portion having a width wider than the slit is provided in the linear member, and the linear member is inserted into the slit to engage the large-diameter portion. And stop
In the slit, a bent portion extending in a different direction with respect to the extending direction of the opening vicinity portion leading to the opening portion to the edge of the support member is formed behind the opening vicinity portion,
A support structure characterized in that a constriction portion that can pass through elastic deformation of the support member or the wire rod is formed in at least a part of the slit.

A plurality of keys, a keyboard frame that supports the entire key, a movable member that is supported by the keyboard frame and interlocks with the key, a linear member that extends in the key arrangement direction, and the keyboard frame that has a key arrangement direction. And a support member that is supported at both ends and is equipped with a sensor that detects a change in the distance between the end portions of the wire material when the key is pressed, so that the movable member interlocked with the key by pressing the key presses the wire material. A support structure for after-touch detection line material for the keyboard device configured as described above,
A slit opened at the edge of the support member is formed in the support member, a large-diameter portion having a width wider than the slit is provided in the linear member, and the linear member is inserted into the slit to engage the large-diameter portion. And stop
In the slit, a bent portion extending in a different direction with respect to the extending direction of the opening vicinity portion leading to the opening portion to the edge of the support member is formed behind the opening vicinity portion,
A support structure characterized in that the support member is made of an elastic body, and the large-diameter portion is urged in a direction in which tension is generated in the wire rod .

The slit is provided with the bent portion so as to extend from a portion on the opening side of the slit through the bent point, and has an extended portion extending beyond the bent point in the extending direction of the bent portion. The support structure according to any one of claims 1 to 5, wherein:

The support structure according to any one of claims 1 to 6, wherein an angle formed by the vicinity of the opening and the bent portion is 90 degrees or less.

The support structure according to any one of claims 1 to 7, wherein a wall surface of the slit includes a high friction portion that generates a large frictional force between the slit and the wire.

Forming a notch in the support member, the slit is formed to be continuous with the notch instead of opening at the edge of the support member,
The wire material is provided with a large-diameter portion that can be inserted into the cutout portion and wider than the slit, and the wire material is inserted into the slit to lock the large-diameter portion,
The bent portion extending in a different direction with respect to the extending direction of the vicinity of the notch that communicates with the notch is formed in the slit behind the notch vicinity. The support structure described in 1.