JPH0749512Y2 - Electronic piano key device - Google Patents
Electronic piano key deviceInfo
- Publication number
- JPH0749512Y2 JPH0749512Y2 JP1987037614U JP3761487U JPH0749512Y2 JP H0749512 Y2 JPH0749512 Y2 JP H0749512Y2 JP 1987037614 U JP1987037614 U JP 1987037614U JP 3761487 U JP3761487 U JP 3761487U JP H0749512 Y2 JPH0749512 Y2 JP H0749512Y2
- Authority
- JP
- Japan
- Prior art keywords
- key
- bowl
- shaped elastic
- elastic body
- vent hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は、電子ピアノの鍵装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a key device for an electronic piano.
（従来の技術） ピアノ特にグランドピアノの場合は、鍵の押下げにより
ジャックが上動し、ジャックはハンマーシャンクローラ
を押してハンマを弦の打撃のために回動した後ハンマー
ジャンクローラから外れる（これを一般にレットオフと
いう）というアクション機構の作動のため、第６図の
Ａ″に示すように、鍵ストロークのレットオフ点で荷重
がピークになる鍵タッチを有する。(Prior Art) In the case of a piano, especially a grand piano, the jack moves up when the key is pressed, the jack pushes the hammer shank roller to rotate the hammer for striking the string, and then comes off the hammer junk roller. Due to the action of an action mechanism called "let-off", the key touch has a peak load at the let-off point of the key stroke, as shown by A "in FIG.
従来、電子ピアノは、このピアノの鍵タッチに似た鍵タ
ッチを得るために種々の工夫がなされている。2. Description of the Related Art Conventionally, an electronic piano has been variously devised to obtain a key touch similar to the key touch of this piano.
第７図はその１例を示す。FIG. 7 shows an example thereof.
図中ａは、前記レットオフ点に相当する鍵ストロークの
位置で荷重がピークになる鍵タッチを得るためのレット
オフ素子で、該レットオフ素子ａは、椀状弾性体a1を逆
にして座板a2上に接着して形成されて例えば棚板ｂ上に
配設され、鍵ｃの押下げ時に該鍵ｃにより押圧され、鍵
ストロークの前記レットオフ点に相当する位置で座屈変
形するものである。ｄは座板a2に形成した空気抜き孔、
ｅは棚板ｂに形成された空気抜き孔ｄに連通する溝で、
この空気抜き孔ｄ及び溝ｅはレットオフ素子ａが座屈変
形したとき内部の空気を外部に効率よく逃すために大き
く形成されている。In the figure, a is a let-off element for obtaining a key touch where the load peaks at the position of the key stroke corresponding to the let-off point. The let-off element a is a seat plate a with the bowl-shaped elastic body a 1 reversed. It is formed by being adhered onto 2 and is disposed on, for example, a shelf board b, and is pressed by the key c when the key c is pushed down, and buckles and deforms at a position corresponding to the let-off point of the key stroke. . d is an air vent hole formed in the seat plate a 2 ,
e is a groove communicating with the air vent hole d formed in the shelf board b,
The air vent hole d and the groove e are formed to be large in order to efficiently release the internal air to the outside when the let-off element a is buckled and deformed.
かくて、該電子ピアノは、鍵ｃの押下げ時に鍵ストロー
クの前記レットオフ点に相当する位置で荷重がピークに
なる鍵ストローク−荷重特性Ａ′が第８図示のように得
られ、第６図示のピアノの特性Ａ″に似た特性が得られ
る。Thus, in the electronic piano, the key stroke-load characteristic A'where the load peaks at the position corresponding to the let-off point of the key stroke when the key c is pushed down is obtained as shown in FIG. A characteristic similar to the characteristic A ″ of the piano is obtained.
（考案が解決しようとする問題点） しかしながら、上述した電子ピアノは、鍵ｃから指を離
していくとき、第８図のＢ′で示すように、荷重がピー
クになる鍵ｃの押下げ時の鍵ストロークの位置とほゞ同
じ位置に荷重がピークになる鍵ストローク−荷重特性を
有しているので、指に異常な圧迫感を受け、第６図の
Ｂ″で示す特性を有するピアノの鍵タッチと余り似てい
ない。(Problems to be solved by the invention) However, when the electronic piano described above is released from the key c, when the key c is pushed down when the load reaches its peak, as indicated by B ′ in FIG. Since it has a keystroke-load characteristic in which the load peaks at about the same position as the keystroke position of, the piano with the characteristic shown by B ″ in FIG. It's not very similar to a key touch.
本考案は、従来の電子ピアノのこのような欠点を解消す
る電子ピアノを提供することをその目的とするものであ
る。An object of the present invention is to provide an electronic piano that solves the above drawbacks of the conventional electronic piano.
（問題点を解決するための手段） 本考案は、上述の目的を達成することをその目的とする
もので、所定距離押し下げられた鍵が更に下動した時、
該鍵により押圧されて変形する椀状弾性体を有するレッ
ドオフ素子を備えた電子ピアノの鍵装置において、該レ
ットオフ素子は、前記椀状弾性体を逆にして座板上に密
着して構成され、該椀状弾性体と座板とで形成される室
と、該室に空気を流入出させ、空気量に対応して前記椀
状弾性体を変形させる空気抜き孔を有し、該空気抜き孔
は鍵の戻り時に該空気抜き孔を介して流入する空気量に
対応して復帰する前記椀状弾性体の原形復帰速度が鍵の
戻り速度より遅くなるような大きさであることを特徴と
する。(Means for Solving the Problems) The present invention aims to achieve the above-mentioned object, and when a key pressed down by a predetermined distance is further lowered,
In a key device of an electronic piano having a red-off element having a bowl-shaped elastic body that is pressed and deformed by the key, the let-off element is formed by closely contacting the seat plate with the bowl-shaped elastic body reversed. , A chamber formed by the bowl-shaped elastic body and the seat plate, and an air vent hole for allowing air to flow in and out of the chamber to deform the bowl-shaped elastic body in accordance with the amount of air, and the air vent hole is When the key is returned, the original shape restoring speed of the bowl-shaped elastic body, which returns according to the amount of air flowing in through the air vent hole, is slower than the returning speed of the key.
（作用） 鍵を押し下げると、レットオフ素子は該鍵により変形
し、鍵ストロークの前記レットオフ点に相当した位置で
座屈する。かくて第３図示の特性Ａから明らかなよう
に、この点で鍵からピアノのレットオフ感が得られる。
鍵を押下げる過程でレットオフ素子の椀状弾性体と座板
で形成される室内の空気は空気抜き孔から放出され、鍵
の押下げ状態で鍵から指を離すと、鍵は元の位置に戻
り、レットオフ素子の室に空気抜き孔から空気が流入し
ながら椀状弾性体は原形に復帰する。この原形復帰速度
は、空気抜き孔の流通抵抗が大きいので、鍵の復帰速度
より遅く、そのため、戻り時レットオフ素子は鍵に接触
せず、鍵タッチはレットオフ素子に影響を受けない。し
たがって第３図のＢに示すように、荷重にピーク点が存
在しなくなり、鍵の戻り時のピアノに似た鍵タッチが得
られる。(Operation) When the key is pushed down, the let-off element is deformed by the key and buckles at a position corresponding to the let-off point of the key stroke. Thus, as is clear from the characteristic A shown in the third figure, the let-off feeling of the piano can be obtained from the key at this point.
When the key is pushed down, the air inside the room formed by the bowl-shaped elastic body of the let-off element and the seat plate is released from the air vent hole, and when the finger is released from the key while the key is pushed down, the key returns to its original position. While the air flows into the chamber of the let-off element through the air vent hole, the bowl-shaped elastic body returns to its original shape. This original return speed is slower than the return speed of the key because the flow resistance of the air vent hole is large, and therefore the return let-off element does not contact the key at the time of return and the key touch is not affected by the let-off element. Therefore, as shown in FIG. 3B, there is no peak point in the load, and a key touch similar to a piano when the key is returned can be obtained.
（実施例） 以下本考案の実施例を図面につき説明する。(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.
第１図及び第２図は本考案の一実施例を示す。1 and 2 show an embodiment of the present invention.
同図において、１はレットオフ素子で、該レットオフ素
子１は、例えば第１図示のように鍵２の手前の下部の棚
板３上に配設されている。該レットオフ素子１は、例え
ばシリコンゴムから成る椀状弾性体11とこれが逆にして
取着（例えば接着）される座板12とから成り、椀状弾性
体11の上部には鍵２が当接する筒状部13が一体に形成さ
れている。該椀状弾性体11は、筒状部13を介して鍵２に
より押圧されたとき、座屈して変形し、ピアノのレット
オフによる鍵タッチと似たタッチ感が得られるような形
状になっている。４は前記筒状部13の内に連なり椀状弾
性体11の上壁に形成された空気抜き孔で、該空気抜き孔
４は、鍵２によりレットオフ素子１が押圧された時、椀
状弾性体11が変形するために室内の空気を外部に流出
し、鍵２に元に戻った時、外気が室内に流入し椀状弾性
体11が鍵２の戻り速度よりも遅い速度で原形に復帰する
ように作用するものである。In the figure, 1 is a let-off element, and the let-off element 1 is arranged on a lower shelf plate 3 in front of the key 2 as shown in the first drawing, for example. The let-off device 1 is, for example composed of a bowl-shaped elastic body 1 1 made of silicon rubber which is reversed attached (eg bonded) to the seat plate 1 2 which, in the upper part of the bowl-shaped elastic member 1 1 Key 2 There the tubular portion 1 3 which abuts is formed integrally.該椀like elastic body 1 1, when it is pressed by the key 2 via the cylindrical portion 1 3, deformed buckles, shaped so as touch feeling similar to the key touch by let-off of the piano is obtained ing. 4 is the tubular portion 1 3 bowl-shaped elastic member 1 1 air vent hole formed in the upper wall of the contiguous within the, the air vent hole 4, when the let-off device 1 is pressed by the key 2, a bowl-shaped elastic When the body 1 1 is deformed, the air in the room flows out to the outside, and when it returns to the key 2, the outside air flows into the room and the bowl-shaped elastic body 1 1 becomes the original shape at a speed slower than the return speed of the key 2. It acts to return to.
第１図において、５はレットオフ素子１内の空気をその
筒状部13から外部に逃がすために鍵２の下面に形成した
溝、６はスイッチ、７は指を離したとき鍵を図示の位置
に復帰させるおもり、８はフェルト等から成る鍵盤枕で
ある。In Figure 1, a groove 5 is formed on the lower surface of the key 2 in order to escape to the outside air in the let-off device 1 from the tubular portion 1 3, 6 switch, 7 illustrated the key when the finger is released The weight 8 for returning to the position is a keyboard pillow made of felt or the like.
前記レットオフ素子１の空気抜き孔４は、第４図示のよ
うに、座板12に形成してもよく、あるいは、第５図に示
すように椀状弾性体11の座板接着部に形成してもよい。
空気抜き孔４は第４図示の位置に形成した時は、棚板３
に該空気抜き孔４に連通し外部に空気を逃がす溝９を形
成する。Air vent hole 4 of the let-off device 1, as in the fourth illustrated, may be formed on the seating plate 1 2, or formed on the seat plate bonding portion of the bowl-shaped elastic member 1 1, as shown in FIG. 5 You may.
When the air vent hole 4 is formed at the position shown in FIG.
Further, a groove 9 communicating with the air vent hole 4 and allowing air to escape to the outside is formed.
（考案の効果） 以上説明したように、本考案によれば、従来のレットオ
フ素子を備えた電子ピアノのような、鍵の戻り時指に異
常な反力を与えることがなく、アコースティックピアノ
の鍵の戻り時のタッチ特性に似たものが得られる効果を
有する。(Effect of the Invention) As described above, according to the present invention, the key of an acoustic piano is not affected by giving an abnormal reaction force to the finger when the key returns, unlike an electronic piano having a conventional let-off element. This has the effect of obtaining something similar to the touch characteristics at the time of return.
第１図は、本考案の１実施例の側面図、第２図（Ａ）は
そのレットオフ素子の斜視図、第２図（Ｂ）はその断面
図、第３図はその鍵ストローク−荷重特性図、第４図及
び第５図は、それぞれ本考案の他の実施例のレットオフ
素子の断面図、第６図はダンパー無しのグランドピアノ
の鍵タッチ−荷重特性図、第７図は従来例の断面図、第
８図はその鍵タッチ−荷重特性図である。 １…レットオフ素子、11…椀状弾性体 12…座板、２…鍵 ４…空気抜き孔FIG. 1 is a side view of one embodiment of the present invention, FIG. 2 (A) is a perspective view of its let-off element, FIG. 2 (B) is its sectional view, and FIG. 3 is its key stroke-load characteristic. FIG. 4, FIG. 4 and FIG. 5 are sectional views of a let-off element of another embodiment of the present invention, FIG. 6 is a key touch-load characteristic diagram of a grand piano without a damper, and FIG. 7 is a conventional example. A sectional view and FIG. 8 are key touch-load characteristic diagrams thereof. DESCRIPTION OF SYMBOLS 1 ... Let-off element, 1 1 1 ... Bowl-shaped elastic body 1 2 ... Seat plate, 2 ... Key 4 ... Air vent hole
Claims (1)
時、該鍵により押圧されて変形する椀状弾性体を有する
レットオフ素子を備えた電子ピアノの鍵装置において、
該レットオフ素子は、前記椀状弾性体を逆にして座板上
に密着して構成され、該椀状弾性体と座板とで形成され
る室と、該室に空気を流入出させ、空気量に対応して前
記椀状弾性体を変形させる空気抜き孔を有し、該空気抜
き孔は鍵の戻り時に該空気抜き孔を介して流入する空気
量に対応して復帰する前記椀状弾性体の原形復帰速度が
鍵の戻り速度より遅くなるような大きさであることを特
徴とする電子ピアノの鍵装置。1. A key device for an electronic piano provided with a let-off element having a bowl-shaped elastic body which is deformed by being pressed by the key when the key pressed down by a predetermined distance is further lowered,
The let-off element is formed by reversing the bowl-shaped elastic body and closely adhering to the seat plate, and a chamber formed by the bowl-shaped elastic body and the seat plate and air flowing in and out of the chamber, An original shape of the bowl-shaped elastic body that has an air vent hole for deforming the bowl-shaped elastic body in accordance with the amount of the air vent hole, and the air vent hole returns in response to the amount of air flowing in through the air vent hole when the key returns. A key device for an electronic piano, which is sized so that the return speed is slower than the return speed of the key.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987037614U JPH0749512Y2 (en) | 1987-03-14 | 1987-03-14 | Electronic piano key device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987037614U JPH0749512Y2 (en) | 1987-03-14 | 1987-03-14 | Electronic piano key device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63144695U JPS63144695U (en) | 1988-09-22 |
| JPH0749512Y2 true JPH0749512Y2 (en) | 1995-11-13 |
Family
ID=30849099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987037614U Expired - Lifetime JPH0749512Y2 (en) | 1987-03-14 | 1987-03-14 | Electronic piano key device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0749512Y2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9040807B2 (en) | 2013-09-27 | 2015-05-26 | Yamaha Corporation | Keyboard apparatus for an electronic musical instrument |
| US9269336B2 (en) | 2013-09-27 | 2016-02-23 | Yamaha Corporation | Operating element device |
| JP2017009811A (en) * | 2015-06-22 | 2017-01-12 | カシオ計算機株式会社 | Keyboard device and keyboard instrument |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5825542U (en) * | 1981-08-12 | 1983-02-18 | 蛇の目電機株式会社 | Stator insulation material |
-
1987
- 1987-03-14 JP JP1987037614U patent/JPH0749512Y2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9040807B2 (en) | 2013-09-27 | 2015-05-26 | Yamaha Corporation | Keyboard apparatus for an electronic musical instrument |
| US9269336B2 (en) | 2013-09-27 | 2016-02-23 | Yamaha Corporation | Operating element device |
| JP2017009811A (en) * | 2015-06-22 | 2017-01-12 | カシオ計算機株式会社 | Keyboard device and keyboard instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63144695U (en) | 1988-09-22 |
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