【考案の詳細な説明】 本考案は鍵のタツチに応じて音量を制御する例
えば電子ピアノ等の電子楽器の鍵タツチレスポン
ス装置の鍵機構に関する。[Detailed Description of the Invention] The present invention relates to a key mechanism for a key touch response device for an electronic musical instrument such as an electronic piano, which controls the volume in accordance with the touch of a key.
一般に電子ピアノ等の電子楽器においては、鍵
のタツチに応じて音源回路からの音源信号の振幅
制御を行ない、タツチに応じた音量すなわち、強
打の時には大音量、弱打の時には小音量を得るこ
とができるタツチレスポンス機構が設けられてい
る。 Generally, in electronic musical instruments such as electronic pianos, the amplitude of the sound source signal from the sound source circuit is controlled according to the touch of the key, and the volume is adjusted according to the touch, that is, a loud volume is obtained when a strong key is struck, and a low volume is obtained when a soft key is struck. A touch response mechanism is provided.
第１図に示すものはその一例である。鍵１は支
点２により支えられ、一端にバネ３が配設され、
他端には打撃部材４が設けられる。この鍵１を矢
印方向に押圧すると打撃部材４が検出部Ｂを打撃
する。検出部Ｂは枠体５により固定された弾性体
６に支えられる高分子エレクトレツトのフイルム
７を有しており、この高分子エレクトレツトのフ
イルム７が打撃部材４で打撃されると、その両面
に設けた極板８からタツチ（押下圧、押下速度）
に応じた電圧の信号が取り出される。 The one shown in FIG. 1 is an example. The key 1 is supported by a fulcrum 2, and a spring 3 is disposed at one end.
A striking member 4 is provided at the other end. When this key 1 is pressed in the direction of the arrow, the striking member 4 strikes the detection part B. The detection part B has a polymer electret film 7 supported by an elastic body 6 fixed by a frame 5. When the polymer electret film 7 is hit by the striking member 4, both sides of the polymer electret film 7 are Touch (pressing pressure, pressing speed) from the electrode plate 8 provided on the
A voltage signal corresponding to the voltage is extracted.
このようにして取り出された信号を利用し音源
回路からの音源信号の振幅を制御すれば鍵のタツ
チに応じてタツチレスポンス効果の付加された楽
音が得られる。 If the amplitude of the sound source signal from the sound source circuit is controlled using the signal extracted in this way, a musical tone to which a touch response effect is added can be obtained in response to the touch of a key.
ところが、このタツチレスポンス機構は、高分
子エレクトレツトのフイルム７を支える弾性体
６、鍵１を復帰するバネ３等の余分な部品が必要
であり、そのため構造が複雑化し調整が難しくバ
ラツキが発生し易いという欠点があつた。 However, this touch response mechanism requires extra parts such as the elastic body 6 that supports the polymer electret film 7 and the spring 3 that returns the key 1, making the structure complicated and making adjustment difficult and causing variations. It had the disadvantage of being easy.
本考案は従来の欠点を除去することを目的とす
るもので、弾性圧電体に電極を設けたピツクアツ
プ自体を鍵とし、該ピツクアツプの一端を基台に
固定してなり、該ピツクアツプの他端を押下する
ことにより該ピツクアツプをわん曲せしめて前記
電極から押下速度又は押下圧に応じた電圧を得る
ようにし、押下を解除することにより前記ピツク
アツプの弾性により該ピツクアツプを元の位置に
復元せしめるようにしてなる。 The purpose of this invention is to eliminate the drawbacks of the conventional method.The pick-up itself, which has electrodes on an elastic piezoelectric material, is used as a key, one end of the pick-up is fixed to a base, and the other end of the pick-up is fixed to a base. By pressing down, the pick-up is bent to obtain a voltage from the electrode according to the pressing speed or pressing pressure, and when the pressing is released, the pick-up is restored to its original position by the elasticity of the pickup. It becomes.
以下本考案の実施例を図面につき説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第２図Ａ，Ｂにおいて、ピツクアツプＡは弾性
圧電体１０をシート状にし、その一面に導電性ゴ
ム等により電極の１つ８1を配置し、他面から一
面に折り曲げて他の電極８2を配置してそれ自体
で鍵を兼ねたもので、弾性圧電体１０はゴムその
他の弾性高分子材料に磁器圧電体粉末及び加硫剤
等を混入し、加硫（又は架橋）して硬度を95°〜
99゜に設定して所望の弾性係数をもたせ、3000〜
70000Vの直流電圧を印加して分極処理が施され
たものである。 In FIGS. 2A and 2B, the pick-up A consists of an elastic piezoelectric material 10 in the form of a sheet, one electrode 81 made of conductive rubber or the like arranged on one surface, and another electrode 82 bent from the other surface to one surface. The elastic piezoelectric body 10 is made by mixing porcelain piezoelectric powder, a vulcanizing agent, etc. into rubber or other elastic polymer material, and vulcanizing (or crosslinking) it to increase its hardness. 95°～
Set to 99° to give the desired elastic modulus, 3000~
It was polarized by applying a DC voltage of 70,000V.
１１は鍵を兼ねたピツクアツプＡの押え部材
で、その下面に弾性圧電体１０に設けた一方の電
極８1と接触する銅箔１２を有する印刷配線基板
１３を同時成形あるいは貼着した。 Reference numeral 11 denotes a holding member of the pick-up A which also serves as a key, and a printed wiring board 13 having a copper foil 12 in contact with one electrode81 provided on the elastic piezoelectric body 10 is simultaneously molded or attached to the lower surface of the holding member.
まず、基台１４に複数のピツクアツプＡの一端
を並列載置し次いで押え部材１１を印刷配線基板
１３を下にして基台１４に固定すれば、ピツクア
ツプＡは基台１４に取付けられるとともに電極８
１は印刷配線基板１３の銅箔１２を介して該基板
に形成された出力回路と接続される。他の電極８
２は、基台１４を介して接地される。 First, one end of a plurality of pick-ups A is placed in parallel on the base 14, and then the holding member 11 is fixed to the base 14 with the printed wiring board 13 facing down, the pick-ups A are attached to the base 14, and the electrodes 8
1 is connected to an output circuit formed on the printed wiring board 13 via the copper foil 12 of the board. Other electrode 8
2 is grounded via the base 14.
かくて、鍵であるピツクアツプＡを下方に押圧
すれば、ピツクアツプＡは彎曲され、タツチ（押
下圧、押下速度）に応じた電圧が電極８1に生じ、
ピツクアツプＡから手を離せばピツクアツプＡの
弾性圧電体１０の弾性により復元する。尚、上記
ピツクアツプＡは更にその上をウレタンゴム（硬
度99゜程度が最適）で被い補強してもよく、また
SN比を上げるためにバイモルフ構造にしてもよ
い。 Thus, when the pick-up A, which is the key, is pressed downward, the pick-up A is bent, and a voltage corresponding to the touch (pressing pressure, pressing speed) is generated on the electrode81 .
When the pick-up A is released, the elasticity of the elastic piezoelectric body 10 of the pick-up A restores its original state. In addition, the above pick-up A may be further reinforced by covering it with urethane rubber (hardness of about 99° is optimal).
A bimorph structure may be used to increase the signal-to-noise ratio.
このように本考案によれば、弾性圧電体に電極
を設けたピツクアツプ自体を鍵とし、該ピツクア
ツプの一端を基台に固定してなり、該ピツクアツ
プの他端を押下することによりピツクアツプをわ
ん曲させて前記電極から押下速度又は押下圧に応
じた電圧を得るようにし、押下を解除することに
より前記ピツクアツプの弾性にてピツクアツプを
元の位置に復元せしめるようにしたので、鍵、鍵
復帰用のバネ等の部品が不必要になり、構造が簡
単になる等の効果を有する。 As described above, according to the present invention, the pick-up itself, which has an electrode provided on an elastic piezoelectric material, is used as a key, one end of the pick-up is fixed to the base, and the pick-up can be bent by pressing down the other end of the pick-up. Then, a voltage corresponding to the pressing speed or pressing pressure is obtained from the electrode, and when the pressing is released, the elasticity of the pick-up restores the pick-up to its original position. This eliminates the need for parts such as springs, and has the advantage of simplifying the structure.
第１図は、従来の電子楽器のタツチレスポンス
機構を原理的に示した図、第２図Ａは本考案の実
施例の第２図ＢのＢ−Ｂ線における断面図、第２
図Ｂは斜視図を示す。 Ａ……ピツクアツプ、８1，８2……電極、１０
……弾性圧電体、１１……押え部材、１２……銅
箔、１３……印刷配線基板、１４……基台。 FIG. 1 is a diagram showing the principle of the touch response mechanism of a conventional electronic musical instrument, FIG.
Figure B shows a perspective view. A... Pickup, 81 , 82 ... Electrode, 10
... Elastic piezoelectric material, 11 ... Pressing member, 12 ... Copper foil, 13 ... Printed wiring board, 14 ... Base.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983194106UJPS59112299U (en) | 1983-12-19 | 1983-12-19 | Key mechanism in touch response device of electronic musical instrument |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983194106UJPS59112299U (en) | 1983-12-19 | 1983-12-19 | Key mechanism in touch response device of electronic musical instrument |
| Publication Number | Publication Date |
|---|---|
| JPS59112299U JPS59112299U (en) | 1984-07-28 |
| JPH0248879Y2true JPH0248879Y2 (en) | 1990-12-21 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1983194106UGrantedJPS59112299U (en) | 1983-12-19 | 1983-12-19 | Key mechanism in touch response device of electronic musical instrument |
| Country | Link |
|---|---|
| JP (1) | JPS59112299U (en) |
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