JPH06149229A - Keyboard device of musical instrument - Google Patents
Keyboard device of musical instrumentInfo
- Publication number
- JPH06149229A JPH06149229A JP4317896A JP31789692A JPH06149229A JP H06149229 A JPH06149229 A JP H06149229A JP 4317896 A JP4317896 A JP 4317896A JP 31789692 A JP31789692 A JP 31789692A JP H06149229 A JPH06149229 A JP H06149229A
- Authority
- JP
- Japan
- Prior art keywords
- contact
- key
- fulcrum portion
- concave
- convex
- 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.)
- Granted
Links
Landscapes
- Electrophonic Musical Instruments (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は電子ピアノ等の楽器の
鍵盤装置に関し、特に鍵の演奏時における摩擦及び雑音
を低減するように改良したものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard device for a musical instrument such as an electronic piano, and more particularly to an improved keyboard device for reducing friction and noise when a key is played.
【０００２】[0002]
【従来の技術】従来における楽器の鍵盤装置として、特
公平１−２８９５６号公報（以下、第１従来例とい
う。）及び特公昭４５−８８２８号公報（以下、第２従
来例という。）にそれぞれ開示されているものがある。2. Description of the Related Art Conventional keyboard devices for musical instruments are disclosed in Japanese Examined Patent Publication No. 1-28956 (hereinafter referred to as the first conventional example) and Japanese Examined Patent Publication No. 45-8828 (hereinafter referred to as the second conventional example). Some are disclosed.
【０００３】前者の第１従来例のものは、鍵の後端部下
面に設けた略Ｌ字状の係合突起を鍵支持部材に穿設した
係合孔に係合し、前記鍵を前記鍵支持部材に前記係合突
起と前記係合孔縁部との当接部を支点として上下方向に
回動自在に支持し、この支点部と案内部材とによって前
記鍵の左右方向及びローリング方向（鍵の前後方向に沿
う軸線を中心として回転する方向）の動きを抑制したも
のである。In the former first prior art example, a substantially L-shaped engaging projection provided on the lower surface of the rear end portion of the key is engaged with an engaging hole formed in the key supporting member to lock the key. The key support member is supported rotatably in the vertical direction with the contact portion between the engagement protrusion and the edge portion of the engagement hole as a fulcrum, and the fulcrum portion and the guide member allow the left and right directions and the rolling direction of the key ( The movement in the direction of rotation about the axis of the key along the front-back direction is suppressed.
【０００４】また、後者の第２従来例のものは、鍵の後
端部と鍵支持部材とを左右方向（水平方向）に沿う１本
の接触線を有する線接触状態及び左右方向略中間部に１
つの接触点を有する点接触状態で接触させることによ
り、前記鍵を前記鍵支持部材に前記接触部を支点として
上下方向に回動自在に支持し、この支点部と案内部材と
によって前記鍵の左右方向及びローリング方向の動きを
抑制したものである。In the latter second prior art example, the rear end of the key and the key support member have a line contact state having one contact line extending in the left-right direction (horizontal direction) and a substantially middle part in the left-right direction. To 1
By making contact with each other in a point contact state having two contact points, the key is supported by the key support member in a vertically rotatable manner with the contact portion as a fulcrum, and by the fulcrum portion and the guide member, the left and right of the key are supported. The movement in the rolling direction and the rolling direction is suppressed.
【０００５】[0005]
【発明が解決しようとする課題】上述した第１従来例の
ものは、支点部で鍵の左右方向及びローリング方向の動
きを抑制すると共に、案内部材でも鍵の左右方向とロー
リング方向の動きを抑制している。このため、鍵自体の
そり・ねじれ、案内部材の傾斜・ねじれ或は係合突起の
ゆがみ等、構成部品の加工精度や取付精度にわずかな誤
差があっても、鍵が案内部材にねじる方向の作用力を及
ぼしてしまい、雑音を発生すると共に、鍵が円滑に動作
せず、鍵のタッチ感（操作感）が悪くなる。また、鍵の
下面と係合突起との間の寸法と、鍵支持部材の板厚寸法
とが正確に一致しないため、係合突起と係合孔との係合
部に隙間が生じて、がたつくことによって、雑音を発生
する。In the first conventional example described above, the fulcrum portion restrains the movement of the key in the left-right direction and the rolling direction, and the guide member also restrains the movement of the key in the left-right direction and the rolling direction. is doing. Therefore, even if there is a slight error in the processing accuracy or mounting accuracy of the components such as the warp / twist of the key itself, the inclination / twist of the guide member, or the distortion of the engaging protrusion, As a result, the action force is exerted, noise is generated, the key does not operate smoothly, and the touch feeling (operation feeling) of the key deteriorates. Further, since the dimension between the lower surface of the key and the engagement protrusion does not exactly match the plate thickness dimension of the key support member, a gap is generated in the engagement portion between the engagement protrusion and the engagement hole, and rattling occurs. By doing so, noise is generated.
【０００６】更に、第２従来例のものは、鍵の左右方向
へのずれを吸収し得るように構成されていないため、鍵
をずれたままセットすると、押鍵時にがたつきが生じた
部分において雑音を発生する。また、線接触部は左右方
向に沿う１本の接触線を有する線接触状態のため、鍵の
ローリング方向への動きを抑制するための案内部材が必
要であり、それだけ鍵の摩擦部が多くなり、鍵が円滑に
動作せず、鍵のタッチ感が悪くなる。Further, since the second conventional example is not constructed so as to be able to absorb the shift of the key in the left-right direction, if the key is set with the shift, the rattling occurs when the key is depressed. Generates noise at. Further, since the line contact portion is in the line contact state having one contact line extending in the left-right direction, a guide member for suppressing the movement of the key in the rolling direction is required, and the friction portion of the key increases accordingly. , The key does not work smoothly and the touch feeling of the key becomes poor.
【０００７】この発明は上記事情に鑑みてなされたもの
で、演奏時における鍵側支点部と鍵支持部材側支点部と
の摩擦及び雑音を低減した楽器の鍵盤装置を提供するこ
とを目的とするものである。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a keyboard device for a musical instrument in which friction and noise between the key-side fulcrum portion and the key-supporting member-side fulcrum portion during performance are reduced. It is a thing.
【０００８】[0008]
【課題を解決するための手段】斯かる目的を達成するた
め請求項１記載の構成は、鍵支持部材に設けられた支点
部に鍵に設けられた支点部を押圧手段で押圧した状態で
互いに当接させ、これら両支点部の互いに当接した部位
を支点として前記鍵を上下方向に回動自在にすると共
に、前記鍵を鍵復帰手段により上方に回動付勢してなる
楽器の鍵盤装置において、前記両支点部のいずれか一方
を凹状とし且つ他方を凸状とし、前記凹状支点部の左右
側面と前記凸状支点部の左右側面とが互いに当接し得る
如くなし、前記凹状支点部の左右側面を、その相互間が
内端側に向かうに従い漸次狭くなる如く傾斜させると共
に、これら左右側面のいずれか一方の側面と、該一方の
側面に当接する前記凸状支点部の一方の側面とを、これ
ら両側面が互いに接触したとき上下方向に沿う１本の接
触線を有する線接触状態となる形状にし、更に前記凹状
支点部の他方の側面と、該他方の側面に当接する前記凸
状支点部の他方の側面とを、これら両側面が互いに接触
したとき上下方向略中間部に１つの接触点を有する点接
触状態となる形状にしたことを特徴とするものである。In order to achieve such an object, the structure according to claim 1 is such that the fulcrum portion provided on the key supporting member presses the fulcrum portion provided on the key with the pressing means. A keyboard device for a musical instrument, which is abutted to allow the key to pivot in the up-down direction with the contact points of the two fulcrums being a fulcrum, and for urging the key to pivot upward by a key returning means. In the above, one of the two fulcrum parts is concave and the other is convex, and the left and right side surfaces of the concave fulcrum part and the left and right side surfaces of the convex fulcrum part are in contact with each other. The left and right side surfaces are inclined so that the distance between them becomes gradually narrower toward the inner end side, and one of the left and right side surfaces and one side surface of the convex fulcrum portion that abuts the one side surface. These two sides are in contact with each other. When this is done, the shape is brought into a line contact state having one contact line along the vertical direction, and the other side surface of the concave fulcrum portion and the other side surface of the convex fulcrum portion that abuts on the other side surface are formed. When the two side surfaces are in contact with each other, the shape is in a point contact state having one contact point in the substantially middle portion in the vertical direction.
【０００９】また、同じく請求項２記載の構成は、鍵支
持部材に設けられた支点部に鍵に設けられた支点部を押
圧手段で押圧した状態で互いに当接係合させ、これら両
支点部の互いに当接した部位を支点として前記鍵を上下
方向に回動自在にすると共に、前記鍵を鍵復帰手段によ
り上方に回動付勢してなる楽器の鍵盤装置において、前
記両支点部のいずれか一方を凹状とし且つ他方を凸状と
し、前記凹状支点部の左右側面と前記凸状支点部の左右
側面とが互いに当接し得る如くなし、前記凹状支点部の
左右側面を、その相互間が内端側に向かうに従い漸次狭
くなる如く傾斜させると共に、これら左右側面のいずれ
か一方の側面の形状をフラット面とし、該凹状支点部の
一方の側面に当接する前記凸状支点部の一方の側面の形
状を略半円筒面とすることにより、これら両端面が接触
したとき上下方向に沿う１本の接触線を有する線接触状
態となる如くし、更に前記凹状支点部の他方の側面を略
半円筒面とし、該他方の側面に当接する前記凸状支点部
の他方の側面を略半球面とすることにより、これら両側
面が接触したとき上下方向略中間部に１つの接触点を有
する点接触状態となる如くしたことを特徴とするもので
ある。Further, according to the second aspect of the present invention, the fulcrum portion provided on the key supporting member is brought into contact with and engaged with the fulcrum portion provided on the key while being pressed by the pressing means. Of the fulcrum part of the musical instrument keyboard device, in which the keys can be pivoted in the up-and-down direction with respect to each other as a fulcrum, and the key is urged upward by a key returning means. One of them is concave and the other is convex so that the left and right side surfaces of the concave fulcrum portion and the left and right side surfaces of the convex fulcrum portion are in contact with each other. The side surface of the convex fulcrum portion that is inclined so as to become gradually narrower toward the inner end side and has the shape of one of the left and right side surfaces as a flat surface and is in contact with one side surface of the concave fulcrum portion. The shape of is a semi-cylindrical surface As a result, when these two end faces come into contact with each other, a line contact state having one contact line extending in the vertical direction is formed, and the other side surface of the concave fulcrum portion is made into a substantially semi-cylindrical surface, and the other side surface. By making the other side surface of the convex fulcrum portion that abuts against a substantially hemispherical surface, when these both side surfaces come into contact with each other, a point contact state having one contact point at a substantially middle portion in the vertical direction is provided. It is what
【００１０】また、同じく請求項３記載の構成は、鍵支
持部材に設けられた支点部に鍵に設けられた支点部を押
圧手段で押圧した状態で互いに当接係合させ、これら両
支点部の互いに当接した部位を支点として前記鍵を上下
方向に回動自在にすると共に、前記鍵を鍵復帰手段によ
り上方に回動付勢してなる楽器の鍵盤装置において、前
記両支点部のいずれか一方を凹状とし且つ他方を凸状と
し、前記凹状支点部の左右側面と前記凸状支点部の左右
側面とが互いに当接し得る如くなし、前記凹状支点部の
左右側面を、その相互間が内端側に向かうに従い漸次狭
くなる如く傾斜させると共に、これら左右側面のいずれ
か一方の側面を略半円筒面とし、該凹状支点部の一方の
側面に当接する前記凸状支点部の一方の側面をフラット
面とすることにより、これら両端面が接触したとき上下
方向に沿う１本の接触線を有する線接触状態となる如く
し、更に前記凹状支点部の他方の側面を略半円筒面と
し、該他方の側面に当接する前記凸状支点部の他方の側
面を略半球面とすることにより、これら両側面が接触し
たとき上下方向略中間部に１つの接触点を有する点接触
状態となる如くしたことを特徴とするものである。Further, according to the third aspect of the present invention, the fulcrum portion provided on the key supporting member is brought into contact with each other while the fulcrum portion provided on the key is pressed by the pressing means. Of the fulcrum part of the musical instrument keyboard device, in which the keys can be pivoted in the up-and-down direction with respect to each other as a fulcrum, and the key is urged upward by a key returning means. One of them is concave and the other is convex so that the left and right side surfaces of the concave fulcrum portion and the left and right side surfaces of the convex fulcrum portion are in contact with each other. The one side surface of the convex fulcrum part that is inclined so as to become gradually narrower toward the inner end side and one of the left and right side surfaces is a substantially semi-cylindrical surface and abuts on one side surface of the concave fulcrum part. Is a flat surface When these two end faces come into contact with each other, a line contact state having one contact line extending in the vertical direction is formed, and the other side surface of the concave fulcrum portion is made into a substantially semi-cylindrical surface and abuts on the other side surface. By making the other side surface of the convex fulcrum part a substantially hemispherical surface, a point contact state having one contact point at a substantially middle portion in the vertical direction when these side surfaces contact each other is provided. Is.
【００１１】更に、同じく請求項４記載の構成は、鍵支
持部材に設けられた支点部に鍵に設けられた支点部を押
圧手段で押圧した状態で互いに当接係合させ、これら両
支点部の互いに当接した部位を支点として前記鍵を上下
方向に回動自在にすると共に、前記鍵を鍵復帰手段によ
り上方に回動付勢してなる楽器の鍵盤装置において、前
記両支点部のいずれか一方を凹状とし且つ他方を凸状と
し、前記凹状支点部の左右側面と前記凸状支点部の左右
側面とが互いに当接し得る如くなし、前記凹状支点部の
左右側面を、その相互間が内端側に向かうに従い漸次狭
くなる如く傾斜させると共に、これら左右側面のいずれ
か一方の側面を略半円筒面とし、該凹状支点部の一方の
側面に当接する前記凸状支点部の一方の側面をフラット
面とすることにより、これら両端面が接触したとき上下
方向に沿う１本の接触線を有する線接触状態となる如く
し、更に前記凹状支点部の他方の側面を中央部がくびれ
た鼓胴状面とし、該他方の側面に当接する前記凸状支点
部の他方の側面を略半円筒面とすることにより、これら
両側面が接触したとき上下方向略中間部に１つの接触点
を有する点接触状態となる如くしたことを特徴とするも
のである。Further, according to the fourth aspect of the present invention, the fulcrum portion provided on the key supporting member is brought into contact with and engaged with the fulcrum portion provided on the key while being pressed by the pressing means. Of the fulcrum part of the musical instrument keyboard device, in which the keys can be pivoted in the up-and-down direction with respect to each other as a fulcrum, and the key is urged upward by a key returning means. One of them is concave and the other is convex so that the left and right side surfaces of the concave fulcrum portion and the left and right side surfaces of the convex fulcrum portion are in contact with each other. The one side surface of the convex fulcrum part that is inclined so as to become gradually narrower toward the inner end side and one of the left and right side surfaces is a substantially semi-cylindrical surface and abuts on one side surface of the concave fulcrum part. Is a flat surface When these two end surfaces come into contact with each other, a line contact state having one contact line extending in the vertical direction is formed, and the other side surface of the concave fulcrum portion is a drum-shaped surface having a constricted central portion, and the other side surface is formed. By making the other side surface of the convex fulcrum portion that abuts the side surface of the above-mentioned substantially semi-cylindrical surface, it becomes a point contact state having one contact point in the substantially vertical middle portion when these both side surfaces contact each other. It is characterized by that.
【００１２】[0012]
【作用】請求項１記載の楽器の鍵盤装置は、凹状支点部
の左右側面のいずれか一方の側面と、凸状支点部の一方
の側面との接触状態が上下方向に沿う１本の接触線を有
する線接触となり、前記凹状支点部の他方の側面と、前
記凸状支点部の他方の側面との接触状態が上下方向略中
間部に１つの接触点を有する点接触となる。このため鍵
は鍵盤として使用する動きの範囲で上下及び左右方向に
それぞれ動くことができると共に、案内部材を設けるこ
となく前記鍵のローリング方向の動きが抑制される。According to the keyboard device for a musical instrument according to claim 1, one of the left and right side surfaces of the concave fulcrum portion and one side surface of the convex fulcrum portion are in contact with each other along one vertical line. And a contact state between the other side surface of the concave fulcrum portion and the other side surface of the convex fulcrum portion is a point contact having one contact point in the substantially vertical middle portion. Therefore, the key can move vertically and horizontally in the range of movement used as a keyboard, and the movement of the key in the rolling direction can be suppressed without providing a guide member.
【００１３】また、請求項２記載の楽器の鍵盤装置は、
凹状支点部の左右側面のいずれか一方の側面をフラット
面とし、この面に当接する凸状支点部の一方の側面を略
半円筒面としたことにより、これらの面の接触状態が上
下方向に沿う線接触となる。また、前記凹状支点部の他
方の側面を略半円筒面とし、この面に当接する前記凸状
支点部の他方の側面を略半球面としたことにより、これ
らの面の接触状態が上下方向略中間部に１つの接触点を
有する点接触となる。このため鍵は鍵盤として使用する
動きの範囲で上下及び左右方向にそれぞれ動くことがで
きると共に、案内部材を設けることなく前記鍵のローリ
ング方向の動きが抑制される。A keyboard device for a musical instrument according to claim 2 is
By making one of the left and right side surfaces of the concave fulcrum part a flat surface and making one side surface of the convex fulcrum part abutting on this surface a semi-cylindrical surface, the contact state of these surfaces can be changed vertically. Line contact along the line. Further, the other side surface of the concave fulcrum portion is a substantially semi-cylindrical surface, and the other side surface of the convex fulcrum portion abutting this surface is a substantially hemispherical surface, so that the contact state of these surfaces is substantially vertical. It is a point contact having one contact point in the middle portion. Therefore, the key can move vertically and horizontally in the range of movement used as a keyboard, and the movement of the key in the rolling direction can be suppressed without providing a guide member.
【００１４】また、請求項３記載の楽器の鍵盤装置は、
凹状支点部の左右側面のいずれか一方の側面を略半円筒
面とし、この面に当接する凸状支点部の一方の側面をフ
ラット面としたことにより、これらの面の接触状態が上
下方向に沿う１本の接触線を有する線接触となる。また
前記凹状支点部の他方の側面を略半円筒面とし、この面
に当接する前記凸状支点部の他方の側面を略半球面とし
たことにより、これらの面の接触状態が上下方向略中間
部に１つの接触点を有する点接触となる。このため鍵は
鍵盤として使用する動きの範囲で上下及び左右方向にそ
れぞれ動くことができると共に、案内部材を設けること
なく前記鍵のローリング方向の動きが抑制される。The keyboard device for a musical instrument according to claim 3 is
By making one of the left and right side surfaces of the concave fulcrum part a substantially semi-cylindrical surface and making one side surface of the convex fulcrum part that abuts this surface a flat surface, the contact state of these surfaces can be changed vertically. It is a line contact with one contact line along it. Further, the other side surface of the concave fulcrum portion is formed into a substantially semi-cylindrical surface, and the other side surface of the convex fulcrum portion contacting this surface is formed into a substantially hemispherical surface, so that the contact state between these surfaces is substantially intermediate in the vertical direction. The point contact has one contact point in the part. Therefore, the key can move vertically and horizontally in the range of movement used as a keyboard, and the movement of the key in the rolling direction can be suppressed without providing a guide member.
【００１５】更に、請求項４記載の楽器の鍵盤装置は、
凹状支点部の左右側面のいずれか一方の側面を略半円筒
面とし、この面に当接する凸状支点部の一方の側面をフ
ラット面としたことにより、これらの面の接触状態が上
下方向に沿う１本の接触線を有する線接触となる。ま
た、前記凹状支点部の他方の側面を中央部がくびれた鼓
胴状面とし、この面に当接する前記凸状支点部の他方の
側面を略半円筒面としたことにより、これらの面の接触
状態が上下方向略中間部に１つの接触点を有する点接触
となる。このため鍵は鍵盤として使用する動きの範囲で
上下及び左右方向にそれぞれ動くことができると共に、
案内部材を設けることなく前記鍵のローリング方向の動
きが抑制される。Further, the keyboard device of the musical instrument according to claim 4 is:
By making one of the left and right side surfaces of the concave fulcrum part a substantially semi-cylindrical surface and making one side surface of the convex fulcrum part that abuts this surface a flat surface, the contact state of these surfaces can be changed vertically. It is a line contact with one contact line along it. In addition, the other side surface of the concave fulcrum portion is a drum-shaped surface having a constricted central portion, and the other side surface of the convex fulcrum portion that abuts on this surface is a substantially semi-cylindrical surface. The contact state is a point contact having one contact point at a substantially middle portion in the vertical direction. Therefore, the key can move vertically and horizontally in the range of movement used as a keyboard,
The movement of the key in the rolling direction is suppressed without providing a guide member.
【００１６】なお、請求項１〜４の構成で、もし案内部
材を設けるとしても非押鍵位置から押鍵終了位置の全位
置を案内しなくても、例えば鍵ストロークのうちの一点
を案内するだけで鍵の左右方向を規制できる。In the structure of claims 1 to 4, even if the guide member is provided, it is not necessary to guide the entire position from the non-key-depressed position to the key-depressed end position. For example, one point of the key stroke is guided. The left and right direction of the key can be regulated with just this.
【００１７】[0017]
【実施例】以下、本発明の実施例を図面に基づき説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【００１８】［第１実施例］図１は本発明の第１実施例
に係る楽器の鍵盤装置の一部を切欠した要部斜視図であ
り、同図中、１は金属板等からなる鍵盤フレームで、そ
の上面には多数の鍵（白鍵と黒鍵）が互いに平行に並べ
た状態で配設されるが、図１においては１つの鍵（白
鍵）２のみが図示されている。この鍵２は合成樹脂製
で、下面が開口する断面略コ字状をなしている。[First Embodiment] FIG. 1 is a perspective view of a key part of a musical instrument according to a first embodiment of the present invention with a part cut away. In FIG. 1, 1 is a keyboard made of a metal plate or the like. On the upper surface of the frame, a large number of keys (white keys and black keys) are arranged in parallel with each other, but in FIG. 1, only one key (white key) 2 is shown. The key 2 is made of synthetic resin and has a substantially U-shaped cross section with an open bottom surface.
【００１９】鍵盤フレーム１の後端縁には垂直上方に向
けて後端壁３が折曲形成されている。鍵盤フレーム１の
前端縁には垂直下方に向けて前端壁４が折曲形成されて
いる。この前端壁４の下端縁には水平前方に向けて水平
壁５が折曲形成されている。この水平壁５の前端縁には
垂直上方に向けて前端壁４の高さの略１／４程度の高さ
に設定された前縁壁６が折曲形成されている。A rear end wall 3 is bent and formed vertically upward at the rear end edge of the keyboard frame 1. A front end wall 4 is bent and formed vertically downward at the front end edge of the keyboard frame 1. A horizontal wall 5 is formed by bending at the lower end edge of the front end wall 4 toward the front in the horizontal direction. A front edge wall 6 is formed at the front edge of the horizontal wall 5 so as to be vertically upward and set at a height of about ¼ of the height of the front end wall 4.
【００２０】鍵盤フレーム１の後端側上面には鍵支持部
材７が設けられている。この鍵支持部材７は、断面長方
形の細長杆状をなしており、その上下方向に貫通するボ
ルト挿通孔８が長手方向に所定間隔を存して複数個（図
１においては１個のみ図示）穿設されている。そして、
鍵支持部材７は、その後面を後端壁３の前面に密着させ
た状態にして鍵盤フレーム１の上面にセットし、各ボル
ト挿通孔８に挿通したボルト９により、この鍵盤フレー
ム１に固定されている。A key support member 7 is provided on the upper surface of the keyboard frame 1 on the rear end side. The key support member 7 has an elongated rod shape with a rectangular cross section, and a plurality of bolt insertion holes 8 penetrating in the up-down direction are arranged at predetermined intervals in the longitudinal direction (only one is shown in FIG. 1). Has been drilled. And
The key supporting member 7 is set on the upper surface of the keyboard frame 1 with its rear surface being in close contact with the front surface of the rear end wall 3, and is fixed to the keyboard frame 1 by the bolts 9 inserted into the respective bolt insertion holes 8. ing.
【００２１】鍵支持部材７の内部には、その前面におい
て開口する凹状支点部１０が長手方向に間隔を存して鍵
２と対応する数だけ（図１においては１個のみ図示）設
けられている。この凹状支点部１０は、図２に示す如く
左右側面部１１，１２を、その相互間が内端側に向かう
に従い漸次狭くなる如く傾斜して、くさび効果が得られ
るようになっている。凹状支点部１０の左側面１１はフ
ラット面とされ、且つ右側面１２は水平軸線を有する略
半円筒面とされている。Inside the key support member 7, concave fulcrums 10 that are open at the front surface are provided in a number corresponding to the keys 2 at intervals in the longitudinal direction (only one is shown in FIG. 1). There is. As shown in FIG. 2, the recessed fulcrum portion 10 is formed by inclining the left and right side surface portions 11 and 12 such that the distance between the left and right side surface portions 11 and 12 becomes gradually narrower toward the inner end side, and a wedge effect is obtained. The left side surface 11 of the concave fulcrum portion 10 is a flat surface, and the right side surface 12 is a substantially semi-cylindrical surface having a horizontal axis.
【００２２】このような構成の凹状支点部１０の左右側
面１１，１２に、図２に示す如く鍵２の後端部に一体形
成された凸状支点部１３の左右側面１４，１５が当接す
る。この凸状支点部１３の左側面１４は垂直軸線を有す
る略半円筒面とされ、且つ右側面１５は略半球面とされ
ている。凸状支点部１３の左側面１４の略半円筒面の垂
直軸線の上下方向略中間部に、右側面１５の略半球面の
水平軸線が交差している。As shown in FIG. 2, the left and right side surfaces 14 and 15 of the convex fulcrum portion 13 integrally formed at the rear end of the key 2 come into contact with the left and right side surfaces 11 and 12 of the concave fulcrum portion 10 having such a structure. . The left side surface 14 of the convex fulcrum portion 13 is a substantially semi-cylindrical surface having a vertical axis, and the right side surface 15 is a substantially hemispherical surface. The horizontal axis of the substantially hemispherical surface of the right side surface 15 intersects with the vertical center of the vertical axis of the substantially semicylindrical surface of the left side surface 14 of the convex fulcrum portion 13.
【００２３】そして、凹状支点部１０の左側面１１に凸
状支点部１３の左側面１４が当接し、図４及び図５に示
す如く、これら両側面１１，１４の接触状態は、上下方
向に沿う１本の接触線を有する線接触となる。また、凹
状支点部１０の右側面１２に凸状支点部１３の右側面１
５が当接し、図４及び図５に示す如く、これら両側面１
２，１５の接触状態は、上下方向略中間部に１つの接触
点１７を有する点接触となる。Then, the left side surface 11 of the concave fulcrum portion 10 comes into contact with the left side surface 14 of the convex fulcrum portion 13, and as shown in FIGS. It is a line contact with one contact line along it. In addition, the right side surface 12 of the concave fulcrum portion 10 and the right side surface 1 of the convex fulcrum portion 13
5 contact each other, and as shown in FIGS. 4 and 5, both side surfaces 1
The contact state of Nos. 2 and 15 is a point contact having one contact point 17 at a substantially intermediate portion in the vertical direction.
【００２４】鍵２は、凹状支点部１０の左右側面１１，
１２と、凸状支点部１３の左右側面１４，１５との当接
部位、即ち接触部１６，１７を支点として上下方向（図
２中、矢印Ｙ方向）及び左右方向（図２中、矢印Ｘ方
向）に鍵盤として使用する動きの範囲で微小角度回動自
在で、ローリング方向（図２中、Ｒ方向）には動かない
ようになっている。The key 2 is provided on the left and right side surfaces 11 of the concave fulcrum portion 10,
12 and the left and right side surfaces 14 and 15 of the convex fulcrum portion 13, that is, the contact portions 16 and 17 as fulcrums in the up-down direction (arrow Y direction in FIG. 2) and the left-right direction (arrow X in FIG. 2). Direction), it can be rotated by a small angle within the range of movement used as a keyboard, and it does not move in the rolling direction (R direction in FIG. 2).
【００２５】鍵２は板ばね（鍵復帰手段及び押圧手段）
１８により上方向に回動付勢されていると共に、凸状支
点部１３の左右側面１４，１５が凹状支点部１０の左右
側面１１，１２に圧接する方向（図２中、矢印Ｚ方向）
に押圧されている。板ばね１８は、図１に示す如く前端
部が鍵盤フレーム１の上面に設けられたばね受部材１９
に且つ後端部が鍵２の後端側凹部内面に設けられたばね
受部材２０にそれぞれ係止されている。The key 2 is a leaf spring (key returning means and pressing means).
A direction in which the left and right side surfaces 14 and 15 of the convex fulcrum portion 13 are pressed against the left and right side surfaces 11 and 12 of the concave fulcrum portion 10 while being urged to rotate upward by 18 (the arrow Z direction in FIG. 2).
Has been pressed. The leaf spring 18 has a spring receiving member 19 whose front end is provided on the upper surface of the keyboard frame 1 as shown in FIG.
In addition, the rear end portion is locked to the spring receiving member 20 provided on the inner surface of the rear end side recess of the key 2.
【００２６】鍵２の前端側の一側壁下端縁部には略Ｌ字
状のストッパアーム２１が一体に突設されており、この
ストッパアーム２１の垂直片部２１ａは、前端壁４の前
面と離間対向している。また、ストッパアーム２１の水
平片部２１ｂは、前端壁４にその長手方向に間隔を存し
て複数個（図１においては１個のみ図示）穿設された上
下方向に細長いガイド孔２２内を移動自在に挿通され
て、鍵盤フレーム１の下面側に延出されている。各ガイ
ド孔２２の幅（左右方向の寸法）Ｗは、ストッパアーム
２１の板厚Ｌの２〜３倍に設定されている。従って、互
いに隣接する２つの鍵２のストッパアーム２１の水平片
部２１ｂが１つのガイド孔２２内に挿通される。A substantially L-shaped stopper arm 21 is integrally projectingly provided on the lower edge of one side wall of the key 2 on the front end side, and a vertical piece 21a of the stopper arm 21 is formed on the front surface of the front end wall 4. They are facing each other. Further, the horizontal piece 21b of the stopper arm 21 is formed in a vertically elongated guide hole 22 formed in the front end wall 4 with a plurality of holes (only one is shown in FIG. 1) formed at intervals in the longitudinal direction. It is movably inserted and extends to the lower surface side of the keyboard frame 1. The width (widthwise dimension) W of each guide hole 22 is set to be 2 to 3 times the plate thickness L of the stopper arm 21. Therefore, the horizontal piece portions 21b of the stopper arms 21 of the two keys 2 adjacent to each other are inserted into the one guide hole 22.
【００２７】ストッパアーム２１の水平片部２１ｂの上
端縁部は、鍵盤フレーム１の前端縁部下面に添装固定さ
れたフェルト等よりなる上限ストッパ２３に当接するこ
とにより、鍵２の上限位置が規制される。また、ストッ
パアーム２１の水平片部２１ｂの下端縁部は、水平壁５
の上面に添装固定されたフェルト等よりなる下限ストッ
パ２４に当接することにより、鍵２の下限位置が規制さ
れる。The upper end edge of the horizontal piece 21b of the stopper arm 21 is brought into contact with an upper limit stopper 23 made of felt or the like attached to the lower surface of the front end edge of the keyboard frame 1 so that the upper limit position of the key 2 is increased. Regulated. Further, the lower end edge of the horizontal piece 21b of the stopper arm 21 has a horizontal wall 5
The lower limit position of the key 2 is regulated by contacting the lower limit stopper 24 made of felt or the like attached and fixed to the upper surface of the key 2.
【００２８】鍵２の凹部内面にはスイッチ押圧部材（ア
クチュエータ）２５が一体に突設されている。このスイ
ッチ押圧部材２５の下端部は、鍵盤フレーム１に穿設さ
れた挿通孔２６内を移動自在に挿通されて、鍵スイッチ
アッセンブリ２７の内方に延出している。そして、鍵２
を板ばね１８の付勢力に抗して下方に押圧すると、スイ
ッチ押圧部材２５によって鍵スイッチアッセンブリ２７
のスイッチ部（図示省略）が押圧されて閉成することに
より発音制御回路（図示省略）が駆動し、当該押圧した
鍵２に対応する音高の音を発生するものである。A switch pressing member (actuator) 25 is integrally provided on the inner surface of the concave portion of the key 2. A lower end portion of the switch pressing member 25 is movably inserted into an insertion hole 26 formed in the keyboard frame 1 and extends inward of the key switch assembly 27. And key 2
Is pressed downward against the urging force of the leaf spring 18, the switch pressing member 25 causes the key switch assembly 27 to move.
The sound generation control circuit (not shown) is driven by pressing the switch portion (not shown) to close the switch portion, and generates a pitch tone corresponding to the pressed key 2.
【００２９】鍵スイッチアッセンブリ２７は、鍵盤フレ
ーム１の下面に配設されている。また、鍵盤フレーム１
の前端縁側上面には、鍵２と対応する数の案内部材２８
が突設されている。この案内部材２８は鍵２の凹部内に
嵌合されて該鍵２の上下方向の動きを案内するもので、
この案内部材２８は鍵２の左右方向を規制するが、ロー
リング方向の動きが規制されることはない。The key switch assembly 27 is arranged on the lower surface of the keyboard frame 1. Also, keyboard frame 1
On the upper surface of the front end edge side of the
Is projected. The guide member 28 is fitted in the concave portion of the key 2 and guides the vertical movement of the key 2.
The guide member 28 regulates the right and left direction of the key 2, but the movement in the rolling direction is not regulated.
【００３０】以上の構成において、凹状支点部１０の左
側面１１と、凸状支点部１３の左側面１４との接触状態
が上下方向に沿う１本の接触線１６を有する線接触で、
凹状支点部１０の右側面１２と凸状支点部１３の右側面
１５との接触状態が上下方向略中間部に１つの接触点１
７を有する点接触であるから、鍵２は接触線１６と接触
点１７を支点に上下及び左右方向に鍵盤として動く範囲
で微小角度回動することができる。この場合、特に鍵２
の主たる動きの方向である上下方向に対する摩擦が小さ
い。しかし、凹状支点部１０の左側面１１と、凸状支点
部１３の左側面１４との接触状態が上下方向に沿う１本
の接触部１６を有する線接触であるために、鍵２のロー
リング方向への回動は抑制される。In the above structure, the contact state between the left side surface 11 of the concave fulcrum portion 10 and the left side surface 14 of the convex fulcrum portion 13 is line contact having one contact line 16 extending in the vertical direction.
The contact state between the right side surface 12 of the concave fulcrum portion 10 and the right side surface 15 of the convex fulcrum portion 13 is one contact point 1 at a substantially middle portion in the vertical direction.
Since it is a point contact having 7, the key 2 can be rotated by a small angle within a range of movement as a keyboard vertically and horizontally with the contact line 16 and the contact point 17 as fulcrums. In this case, especially key 2
Friction is small in the vertical direction, which is the main direction of movement. However, since the contact state between the left side surface 11 of the concave fulcrum portion 10 and the left side surface 14 of the convex fulcrum portion 13 is a line contact having one contact portion 16 along the vertical direction, the rolling direction of the key 2 The rotation to the is suppressed.
【００３１】従って、鍵２側の凸状支点部１３と鍵支持
部材７側の凹状支点部１０とは、１本の接触線１６と、
１つの接触点１７との２箇所で接触しているだけで、鍵
２の上下及び左右方向への動きは許容し、鍵２のローリ
ング方向への動きを抑制しているから、摩擦部が少なく
なって鍵の動きが円滑になり、鍵２のタッチ感が良好と
なると共に、雑音を発生しない。また、鍵２のローリン
グ方向への動きを抑制するための案内部材が不要となる
から、より一層摩擦部が少なくなる。更に、凹状支点部
１０の左右側面１１，１２は、その相互間が内端側に向
かうに従い漸次狭くなる如く傾斜し、しかも板ばね１８
により凸状支点部１３が凹状支点部１０に押圧されてい
ることによるくさび効果で、両支点部１３，１０相互間
に隙間が発生しないため、がたつくことがなく、雑音を
発生しないと共に、自動調芯される。Therefore, the convex fulcrum portion 13 on the key 2 side and the concave fulcrum portion 10 on the key supporting member 7 side have one contact line 16.
Only in contact with one contact point 17 at two points, movement of the key 2 in the vertical and horizontal directions is allowed, and movement of the key 2 in the rolling direction is suppressed. As a result, the key moves smoothly, the touch feeling of the key 2 is improved, and noise is not generated. Further, since the guide member for suppressing the movement of the key 2 in the rolling direction is unnecessary, the friction portion is further reduced. Further, the left and right side surfaces 11 and 12 of the concave fulcrum portion 10 are inclined such that the distance between them becomes gradually narrower toward the inner end side, and the leaf spring 18
The convex fulcrum portion 13 is pressed against the concave fulcrum portion 10 by the wedge effect so that no gap is generated between the fulcrum portions 13 and 10, so that there is no rattling, no noise is generated, and automatic adjustment is performed. Cored.
【００３２】なお、上述した如く鍵２の左右方向への動
きを抑制していないので、横揺れ鍵盤、即ち鍵２を左右
方向に微妙に動かすことによって、ビブラート、トレモ
ロ、パン、リヴァーブ等の変調効果を得る演奏を可能と
した鍵盤への適用が容易となる。この場合は、案内部材
２８の、鍵２の両側壁内面に当接する部位に、横揺れセ
ンサとしてポリエステルフィルムをベースにした銀電極
と感圧フィルムとからなる感圧センサを貼着すればよ
い。前記感圧センサは感圧ゴムであっても良い。Since the horizontal movement of the key 2 is not suppressed as described above, the horizontal keyboard, that is, the key 2 is slightly moved left and right to modulate the vibrato, tremolo, pan, reverb and the like. This makes it easy to apply to keyboards that enable effective playing. In this case, a pressure-sensitive sensor composed of a silver electrode and a pressure-sensitive film based on a polyester film as a roll sensor may be attached to a portion of the guide member 28 that abuts on the inner surfaces of both side walls of the key 2. The pressure sensor may be pressure sensitive rubber.
【００３３】［第２実施例］次に本発明の第２実施例を
図６〜図９に基づき説明する。なお、本実施例において
上述した第１実施例と同一部分については、図面に同一
符号を付して説明する。[Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the same parts as those in the first embodiment described above will be described with the same reference numerals in the drawings.
【００３４】図６は本発明の第２実施例に係る楽器の鍵
盤装置における凹状支点部と凸状支点部の非係合状態を
示す斜視図である。本実施例において第１実施例と異な
る点は、鍵支持部材７側の凹状支点部１０の左側面１１
を、垂直軸線を有する略半円筒面とし、右側面１２を水
平軸線を有する略半円筒面とし、また、鍵２側の凸状支
点部１３の左側面１４をフラット面とし、右側面１５を
略半球面としたことである。なお、凹状支点部１０を貫
通孔にすると、金型で成形できる。FIG. 6 is a perspective view showing a non-engagement state of the concave fulcrum portion and the convex fulcrum portion in the keyboard device of the musical instrument according to the second embodiment of the present invention. This embodiment differs from the first embodiment in that the left side surface 11 of the concave fulcrum portion 10 on the key support member 7 side is different.
Is a substantially semi-cylindrical surface having a vertical axis, the right side surface 12 is a substantially semi-cylindrical surface having a horizontal axis, the left side surface 14 of the convex fulcrum portion 13 on the key 2 side is a flat surface, and the right side surface 15 is That is, it is a substantially hemispherical surface. If the concave fulcrum portion 10 is a through hole, it can be molded with a mold.
【００３５】本実施例の場合も、図７に示す如く両支点
部１０，１３を係合した状態において、凹状支点部１０
の左側面１１と凸状支点部１３の左側面１４との接触状
態は、図８及び図９に示す如く上下方向に沿う１本の接
触線１６を有する線接触となり、また、凹状支点部１０
の右側面１２と凸状支点部１３の右側面１５との接触状
態は、図８及び図９に示す如く上下方向略中間部に１つ
の接触点１７を有する点接触となり、第１実施例と同様
の効果を奏し得る。Also in the case of this embodiment, as shown in FIG. 7, when the fulcrums 10 and 13 are engaged, the concave fulcrum 10 is formed.
The contact state between the left side surface 11 and the left side surface 14 of the convex fulcrum portion 13 is a line contact having one contact line 16 extending in the vertical direction as shown in FIGS. 8 and 9, and the concave fulcrum portion 10
The contact state between the right side surface 12 and the right side surface 15 of the convex fulcrum portion 13 is a point contact having one contact point 17 at a substantially middle portion in the vertical direction as shown in FIGS. The same effect can be achieved.
【００３６】［第３実施例］次に本発明の第３実施例を
図１０〜図１３に基づき説明する。なお、本実施例にお
いて上述した第１実施例と同一部分については、図面に
同一符号を付して説明する。[Third Embodiment] Next, a third embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the same parts as those in the first embodiment described above will be described with the same reference numerals in the drawings.
【００３７】図１０は本発明の第３実施例に係る楽器の
鍵盤装置における凹状支点部と凸状支点部の非係合状態
を示す斜視図である。本実施例において第１実施例と異
なる点は、鍵支持部材７側の凹状支点部１０の左側面１
１を、垂直軸線を有する略半円筒面とし、右側面１２を
水平軸線を有すると共に中央部がくびれた鼓胴状面と
し、また鍵２側の凸状支点部１３の左側面１４をフラッ
ト面とし、右側面１５を水平軸線を有する略半円筒面と
したことである。FIG. 10 is a perspective view showing a non-engagement state of the concave fulcrums and the convex fulcrums in the keyboard device of the musical instrument according to the third embodiment of the present invention. The present embodiment is different from the first embodiment in that the left side surface 1 of the concave fulcrum portion 10 on the key support member 7 side.
1 is a substantially semi-cylindrical surface having a vertical axis, a right side surface 12 is a drum-shaped surface having a horizontal axis and a central portion is constricted, and a left side surface 14 of a convex fulcrum portion 13 on the key 2 side is a flat surface. That is, the right side surface 15 is a substantially semi-cylindrical surface having a horizontal axis.
【００３８】本実施例の場合も、図１１に示す如く両支
点部１０，１３を係合した状態において、凹状支点部１
０の左側面１１と凸状支点部１３の左側面１４との接触
状態は、図１２及び図１３に示す如く上下方向に沿う１
本の接触線１６を有する線接触となり、また、凹状支点
部１０の右側面１２と凸状支点部１３の右側面１５との
接触状態は、図１２及び図１３に示す如く上下方向略中
間部に１つの接触点１７を有する点接触となり、第１実
施例と同様の効果を奏し得る。Also in the case of this embodiment, as shown in FIG. 11, the concave fulcrum portion 1 is formed in a state where both fulcrum portions 10 and 13 are engaged.
The contact state between the left side surface 11 of 0 and the left side surface 14 of the convex fulcrum portion 13 is 1 in the vertical direction as shown in FIGS. 12 and 13.
A line contact having a book contact line 16 is made, and the contact state between the right side surface 12 of the concave fulcrum portion 10 and the right side surface 15 of the convex fulcrum portion 13 is as shown in FIG. 12 and FIG. Since this is a point contact having one contact point 17 in the above, the same effect as that of the first embodiment can be obtained.
【００３９】［第４実施例］次に、本発明の第４実施例
を図１４〜図１６に基づき説明する。なお、本実施例に
おいて、上述した各実施例と同一部分については、図面
に同一符号を付して説明する。[Fourth Embodiment] Next, a fourth embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the same parts as those in the above-described embodiments will be described with the same reference numerals in the drawings.
【００４０】本実施例において上述した各実施例と異な
る点は、図１４に示す如く上端部両側に突部２８ａ，２
８ｂを有する点接触型の案内部材２８′により、鍵２の
左右方向への動きを抑制したことである。即ち、上述し
た各実施例で説明した如く凹状支点部１０の左側面１１
と凸状支点部１３の左側面１４との接触状態が上下方向
に沿う１本の接触線１６を有する線接触となっているこ
とにより、鍵２のローリング方向の動きは、既に抑制さ
れているから、案内部材２８′としては、図１５に示す
如く鍵２の左右方向の動きを抑制するだけで良いもので
ある。従って、図１６に示す如く突部２８ａ，２８ｂが
択一的に鍵２の両側壁内面に接触する構成、即ち１点で
接触する構成であれば良いので、鍵２が案内部材２８′
に曲げ作用力を及ぼさなくて済む。This embodiment differs from the above-mentioned embodiments in that the protrusions 28a, 2 are provided on both sides of the upper end as shown in FIG.
The point contact type guide member 28 'having 8b suppresses the movement of the key 2 in the left-right direction. That is, the left side surface 11 of the concave fulcrum portion 10 as described in each of the above-described embodiments.
The contact state between the left side surface 14 of the convex fulcrum portion 13 and the left side surface 14 is a line contact having a single contact line 16 extending in the vertical direction, so that the movement of the key 2 in the rolling direction is already suppressed. Therefore, as the guide member 28 ', it is only necessary to suppress the lateral movement of the key 2 as shown in FIG. Therefore, as shown in FIG. 16, the protrusions 28a, 28b may alternatively contact the inner surfaces of both side walls of the key 2, that is, the contact at a single point.
It is not necessary to exert a bending action force on.
【００４１】従来構成の場合、図１６の状態となったと
き鍵の一側壁内面に案内部材の一側縁側上端角部が接触
し、鍵の他側壁下端縁部が鍵の他側面に接触することに
より鍵が案内部材に曲げ作用力を及ぼしていた。In the case of the conventional structure, when the state shown in FIG. 16 is reached, the upper edge corner of one side edge of the guide member contacts the inner surface of one side wall of the key, and the lower edge of the other side wall contacts the other side surface of the key. As a result, the key exerted a bending action force on the guide member.
【００４２】また、本実施例によれば、鍵２の案内部材
２８′との１点接触による低摩擦に加えて、鍵２の演奏
形態上、鍵２が案内部材２８′の突部２８ａ，２８ｂに
左右方向に強く押し付けられることもないので、鍵２の
動作時（演奏時）における摩擦は非常に小さくなる。Further, according to this embodiment, in addition to the low friction caused by the one-point contact of the key 2 with the guide member 28 ', the key 2 has a projection 28a, Since it is not strongly pressed in the left-right direction against 28b, friction during the operation of the key 2 (at the time of playing) is extremely small.
【００４３】一方、凹状支点部１０と凸状支点部１３と
の接触部において発生する摺動摩擦は、てこ比（０対無
限大）の関係上、演奏に支障をきたすような大きさには
ならない。On the other hand, the sliding friction generated at the contact portion between the concave fulcrum portion 10 and the convex fulcrum portion 13 is not so large as to impair the performance due to the leverage ratio (0 to infinity). .
【００４４】本実施例の如く、上述した各実施例で説明
した構成の凹状支点部１０と凸状支点部１３とによる鍵
支点構造と、１点接触型の案内部材２８′とを組み合わ
せることによって、上述した従来の問題点を解消し得る
ものである。As in this embodiment, by combining the key fulcrum structure composed of the concave fulcrum portion 10 and the convex fulcrum portion 13 having the constructions described in the above-mentioned respective embodiments and the guide member 28 'of the one-point contact type. The conventional problems described above can be solved.
【００４５】［その他の実施例］上記各実施例において
は本発明を白鍵に適用した場合について説明したが、黒
鍵にも適用し得ることは勿論である。また、上記各実施
例においては、凸状支点部１３の形状を鍵２の後端部の
断面形状より小さくしたが、大きくしてもよい。このよ
うに凸状支点部１３の形状を大きくすれば、凹状支点部
１０の左側面１１と凸状支点部１３の左側面１４との接
触部１６の線接触の長さが長くなるので、鍵２のローリ
ング方向の動きに対する抑制がより一層確実になる。ま
た、上記各実施例においては、鍵支持部材７側に凹状支
点部１０を設け且つ鍵２の後端部側に凸状支点部１３を
設けた場合について説明したが、その逆、即ち鍵支持部
材７側に凸状支点部１３を、鍵２の後端部側に凹状支点
部１０をそれぞれ設けても良い。また、上記各実施例に
おいては、凹状支点部１０の左右側面１１，１２の形状
を左右逆にし、これに伴い凸状支点部１３の左右側面１
４，１５の形状を左右逆にしてもよい。更に、上記各実
施例では、板ばね１８を鍵復帰手段及び押圧手段とした
が、鍵復帰手段として重りや付勢部材を独立に設けても
良い。例えば、鍵支点を鍵の中間部とし、鍵後端に重り
を設けて鍵復帰手段とし、板ばねを押圧手段としてもよ
い。[Other Embodiments] In each of the above embodiments, the case where the present invention is applied to the white key has been described, but it goes without saying that the present invention can also be applied to the black key. In addition, in each of the above-described embodiments, the shape of the convex fulcrum portion 13 is made smaller than the cross-sectional shape of the rear end portion of the key 2, but it may be made larger. If the shape of the convex fulcrum portion 13 is increased in this way, the length of the line contact of the contact portion 16 between the left side surface 11 of the concave fulcrum portion 10 and the left side surface 14 of the convex fulcrum portion 13 becomes long. The suppression of the movement of 2 in the rolling direction becomes more reliable. Further, in each of the above-described embodiments, the case where the concave fulcrum portion 10 is provided on the key support member 7 side and the convex fulcrum portion 13 is provided on the rear end side of the key 2 has been described. The convex fulcrum portion 13 may be provided on the member 7 side, and the concave fulcrum portion 10 may be provided on the rear end side of the key 2. Further, in each of the above-described embodiments, the shapes of the left and right side surfaces 11 and 12 of the concave fulcrum portion 10 are reversed, and the left and right side surfaces 1 of the convex fulcrum portion 13 are accordingly changed.
The shapes of 4, 15 may be reversed right and left. Further, in each of the above-described embodiments, the leaf spring 18 is used as the key return means and the pressing means, but a weight or a biasing member may be independently provided as the key return means. For example, the key fulcrum may be the middle part of the key, a weight may be provided at the rear end of the key to serve as the key returning means, and the leaf spring may serve as the pressing means.
【００４６】［発明の効果］以上詳述した如く請求項１
〜４に記載の楽器の鍵盤装置によれば、凹状支点部と凸
状支点部とが上下方向に沿う１本の接触線を有する線接
触と、上下方向略中間部に１つの接触点を有する点接触
状態とで接触しているだけで、鍵の上下及び左右方向へ
の動きを許容し且つローリング方向への動きを抑制して
いる。[Effects of the Invention] Claim 1 as described in detail above.
According to the keyboard device for a musical instrument described in any one of claims 1 to 4, the concave fulcrum portion and the convex fulcrum portion have a line contact having one contact line extending in the vertical direction, and one contact point at a substantially intermediate portion in the vertical direction. Only by contacting in a point contact state, the movement of the key in the vertical and horizontal directions is allowed and the movement in the rolling direction is suppressed.
【００４７】このため、鍵の動作時における摩擦部が少
なくなり、鍵の動きが円滑となって、鍵のタッチ感が良
好になると共に、雑音を発生しない。また、鍵のローリ
ング方向への動きを抑制するための案内部材が不要とな
るから、鍵の動作時における摩擦力がより一層少なくな
る。Therefore, the frictional portion during the operation of the key is reduced, the movement of the key is smooth, the touch feeling of the key is improved, and noise is not generated. Further, since the guide member for suppressing the movement of the key in the rolling direction is unnecessary, the frictional force during the operation of the key is further reduced.
【００４８】更に、凹状支点部の左右側面は、その相互
間が内端側に向かうに従い漸次狭くなる如く傾斜し、し
かも押圧手段により凸状支点部が凹状支点部に押圧され
ているので、くさび効果が生じ、両支点部相互間に隙間
が発生しないため、がたつくことがなく、雑音を発生し
ないと共に、自動調芯される。Further, the right and left side surfaces of the concave fulcrum portion are inclined so that the distance between them becomes gradually narrower toward the inner end side, and the convex fulcrum portion is pressed against the concave fulcrum portion by the pressing means. Since the effect is produced and no gap is generated between the fulcrums, there is no rattling, no noise is generated, and the centering is performed automatically.
【図１】本発明の第１実施例に係る楽器の鍵盤装置の一
部を切欠した要部斜視図である。FIG. 1 is a partial perspective view of a keyboard device of a musical instrument according to a first embodiment of the present invention with a part thereof cut away.
【図２】同装置における凹状支点部と凸状支点部の非係
合状態の斜視図である。FIG. 2 is a perspective view of a concave fulcrum portion and a convex fulcrum portion in the device in a non-engaged state.
【図３】同装置における凹状支点部と凸状支点部の係合
状態の斜視図である。FIG. 3 is a perspective view of an engagement state of a concave fulcrum portion and a convex fulcrum portion in the same device.
【図４】図３のＡ−Ａ線に沿う断面図である。4 is a sectional view taken along the line AA of FIG.
【図５】図３のＢ−Ｂ線に沿う断面図である。5 is a cross-sectional view taken along the line BB of FIG.
【図６】本発明の第２実施例に係る楽器の鍵盤装置にお
ける凹状支点部と凸状支点部の非係合状態の斜視図であ
る。FIG. 6 is a perspective view of a concave fulcrum portion and a convex fulcrum portion in a non-engaged state in a keyboard device for a musical instrument according to a second embodiment of the present invention.
【図７】同装置における凹状支点部と凸状支点部の係合
状態の斜視図である。FIG. 7 is a perspective view of an engagement state of a concave fulcrum portion and a convex fulcrum portion in the same device.
【図８】図７のＣ−Ｃ線に沿う断面図である。8 is a cross-sectional view taken along the line CC of FIG.
【図９】図７のＤ−Ｄ線に沿う断面図である。9 is a cross-sectional view taken along the line DD of FIG.
【図１０】本発明の第３実施例に係る楽器の鍵盤装置に
おける凹状支点部と凸状支点部の非係合状態の斜視図で
ある。FIG. 10 is a perspective view of a concave fulcrum portion and a convex fulcrum portion in a disengaged state in a keyboard device for a musical instrument according to a third embodiment of the present invention.
【図１１】同装置における凹状支点部と凸状支点部の係
合状態の斜視図である。FIG. 11 is a perspective view of an engagement state of a concave fulcrum portion and a convex fulcrum portion in the same device.
【図１２】図１１のＥ−Ｅ線に沿う断面図である。12 is a cross-sectional view taken along the line EE of FIG.
【図１３】図１１のＦ−Ｆ線に沿う断面図である。13 is a cross-sectional view taken along the line FF of FIG.
【図１４】本発明の第４実施例に係る楽器の鍵盤装置に
おける案内部材の斜視図である。FIG. 14 is a perspective view of a guide member in a keyboard device for musical instruments according to a fourth embodiment of the present invention.
【図１５】図１４に示す案内部材と鍵との関係を示す一
部を切欠した斜視図である。FIG. 15 is a partially cutaway perspective view showing the relationship between the guide member and the key shown in FIG.
【図１６】図１４に示す案内部材と鍵とが接触した状態
の断面図である。16 is a cross-sectional view showing a state where the guide member and the key shown in FIG. 14 are in contact with each other.
２ 鍵 ７ 鍵支持部材 １０ 凹状支点部 １１ 凹状支点部の左側面図 １２ 凹状支点部の右側面図 １３ 凸状支点部 １４ 凸状支点部の左側面 １５ 凸状支点部の右側面 １６ 接触線 １７ 接触点 １８ 板ばね（鍵復帰手段、押圧手段） 2 key 7 key support member 10 concave fulcrum part 11 left side view of concave fulcrum part 12 right side view of concave fulcrum part 13 convex fulcrum part 14 left side surface of convex fulcrum part 15 right side surface of convex fulcrum part 16 contact line 17 Contact point 18 Leaf spring (key return means, pressing means)
Claims (4)
けられた支点部を押圧手段で押圧した状態で互いに当接
させ、これら両支点部の互いに当接した部位を支点とし
て前記鍵を上下方向に回動自在にすると共に、前記鍵を
鍵復帰手段により上方に回動付勢してなる楽器の鍵盤装
置において、前記両支点部のいずれか一方を凹状とし且
つ他方を凸状とし、前記凹状支点部の左右側面と前記凸
状支点部の左右側面とが互いに当接し得る如くなし、前
記凹状支点部の左右側面を、その相互間が内端側に向か
うに従い漸次狭くなる如く傾斜させると共に、これら左
右側面のいずれか一方の側面と、該一方の側面に当接す
る前記凸状支点部の一方の側面とを、これら両側面が互
いに接触したとき上下方向に沿う１本の接触線を有する
線接触状態となる形状にし、更に前記凹状支点部の他方
の側面と、該他方の側面に当接する前記凸状支点部の他
方の側面とを、これら両側面が互いに接触したとき上下
方向略中間部に１つの接触点を有する点接触状態となる
形状にしたことを特徴とする楽器の鍵盤装置。1. A fulcrum portion provided on a key supporting member is abutted against each other in a state in which a fulcrum portion provided on a key is pressed by a pressing means, and the abutting portions of these fulcrum portions are used as fulcrums as the fulcrum. In a keyboard device of a musical instrument in which the key is pivotally urged upward by a key return means, and one of the fulcrums is concave and the other is convex. , The left and right side surfaces of the concave fulcrum portion and the left and right side surfaces of the convex fulcrum portion are in contact with each other, and the left and right side surfaces of the concave fulcrum portion are inclined so that the distance between them becomes gradually narrower toward the inner end side. In addition, one of the left and right side surfaces and one side surface of the convex fulcrum portion abutting on the one side surface are provided with a single contact line extending in the vertical direction when the both side surfaces contact each other. With line shape And the other side surface of the concave fulcrum portion and the other side surface of the convex fulcrum portion that abuts the other side surface are in contact with each other at the middle in the vertical direction when these side surfaces contact each other. A keyboard device for a musical instrument, characterized in that it is formed into a point contact state having points.
けられた支点部を押圧手段で押圧した状態で互いに当接
係合させ、これら両支点部の互いに当接した部位を支点
として前記鍵を上下方向に回動自在にすると共に、前記
鍵を鍵復帰手段により上方に回動付勢してなる楽器の鍵
盤装置において、前記両支点部のいずれか一方を凹状と
し且つ他方を凸状とし、前記凹状支点部の左右側面と前
記凸状支点部の左右側面とが互いに当接し得る如くな
し、前記凹状支点部の左右側面を、その相互間が内端側
に向かうに従い漸次狭くなる如く傾斜させると共に、こ
れら左右側面のいずれか一方の側面の形状をフラット面
とし、該凹状支点部の一方の側面に当接する前記凸状支
点部の一方の側面の形状を略半円筒面とすることによ
り、これら両端面が接触したとき上下方向に沿う１本の
接触線を有する線接触状態となる如くし、更に前記凹状
支点部の他方の側面を略半円筒面とし、該他方の側面に
当接する前記凸状支点部の他方の側面を略半球面とする
ことにより、これら両側面が接触したとき上下方向略中
間部に１つの接触点を有する点接触状態となる如くした
ことを特徴とする楽器の鍵盤装置。2. A fulcrum portion provided on the key support member is brought into contact with each other in a state where the fulcrum portion provided on the key is pressed by the pressing means. In a keyboard device for a musical instrument, wherein the key is rotatable in the vertical direction and the key is pivotally urged upward by a key returning means, one of the fulcrums is concave and the other is convex. The left and right side surfaces of the concave fulcrum portion and the left and right side surfaces of the convex fulcrum portion are in contact with each other, and the left and right side surfaces of the concave fulcrum portion are gradually narrowed toward each other toward the inner end side. In addition, the shape of one of the left and right side surfaces is a flat surface, and the shape of one side surface of the convex fulcrum portion that abuts one side surface of the concave fulcrum portion is a substantially semi-cylindrical surface. By doing so, these two end surfaces come into contact with each other. When this is done, a line contact state having one contact line along the vertical direction is made, and the other side surface of the concave fulcrum portion is made into a substantially semi-cylindrical surface, and the convex fulcrum portion abutting on the other side surface is formed. A keyboard device for a musical instrument, wherein the other side surface is formed into a substantially hemispherical surface so that when these two side surfaces come into contact with each other, a point contact state having one contact point at a substantially middle portion in the vertical direction is provided.
けられた支点部を押圧手段で押圧した状態で互いに当接
係合させ、これら両支点部の互いに当接した部位を支点
として前記鍵を上下方向に回動自在にすると共に、前記
鍵を鍵復帰手段により上方に回動付勢してなる楽器の鍵
盤装置において、前記両支点部のいずれか一方を凹状と
し且つ他方を凸状とし、前記凹状支点部の左右側面と前
記凸状支点部の左右側面とが互いに当接し得る如くな
し、前記凹状支点部の左右側面を、その相互間が内端側
に向かうに従い漸次狭くなる如く傾斜させると共に、こ
れら左右側面のいずれか一方の側面を略半円筒面とし、
該凹状支点部の一方の側面に当接する前記凸状支点部の
一方の側面をフラット面とすることにより、これら両端
面が接触したとき上下方向に沿う１本の接触線を有する
線接触状態となる如くし、更に前記凹状支点部の他方の
側面を略半円筒面とし、該他方の側面に当接する前記凸
状支点部の他方の側面を略半球面とすることにより、こ
れら両側面が接触したとき上下方向略中間部に１つの接
触点を有する点接触状態となる如くしたことを特徴とす
る楽器の鍵盤装置。3. The fulcrum portion provided on the key supporting member is brought into contact with each other in a state where the fulcrum portion provided on the key is pressed by the pressing means, and the mutually abutting portions of these fulcrum portions are used as fulcrums. In a keyboard device for a musical instrument, wherein the key is rotatable in the vertical direction and the key is pivotally urged upward by a key returning means, one of the fulcrums is concave and the other is convex. The left and right side surfaces of the concave fulcrum portion and the left and right side surfaces of the convex fulcrum portion are in contact with each other, and the left and right side surfaces of the concave fulcrum portion are gradually narrowed toward each other toward the inner end side. And make one of the left and right side surfaces a semi-cylindrical surface,
By making one side surface of the convex fulcrum portion abutting on one side surface of the concave fulcrum portion a flat surface, a line contact state having one contact line extending in the vertical direction when these both end surfaces are in contact is obtained. Further, by making the other side surface of the concave fulcrum part a substantially semi-cylindrical surface and making the other side surface of the convex fulcrum part abutting the other side surface a substantially hemispherical surface, these two side surfaces contact each other. A keyboard device for a musical instrument, characterized in that a point contact state having one contact point at a substantially middle portion in the vertical direction is brought about.
けられた支点部を押圧手段で押圧した状態で互いに当接
係合させ、これら両支点部の互いに当接した部位を支点
として前記鍵を上下方向に回動自在にすると共に、前記
鍵を鍵復帰手段により上方に回動付勢してなる楽器の鍵
盤装置において、前記両支点部のいずれか一方を凹状と
し且つ他方を凸状とし、前記凹状支点部の左右側面と前
記凸状支点部の左右側面とが互いに当接し得る如くな
し、前記凹状支点部の左右側面を、その相互間が内端側
に向かうに従い漸次狭くなる如く傾斜させると共に、こ
れら左右側面のいずれか一方の側面を略半円筒面とし、
該凹状支点部の一方の側面に当接する前記凸状支点部の
一方の側面をフラット面とすることにより、これら両端
面が接触したとき上下方向に沿う１本の接触線を有する
線接触状態となる如くし、更に前記凹状支点部の他方の
側面を中央部がくびれた鼓胴状面とし、該他方の側面に
当接する前記凸状支点部の他方の側面を略半円筒面とす
ることにより、これら両側面が接触したとき上下方向略
中間部に１つの接触点を有する点接触状態となる如くし
たことを特徴とする楽器の鍵盤装置。4. The fulcrum portion provided on the key supporting member is brought into contact with each other in a state where the fulcrum portion provided on the key is pressed by the pressing means. In a keyboard device for a musical instrument, wherein the key is rotatable in the vertical direction and the key is pivotally urged upward by a key returning means, one of the fulcrums is concave and the other is convex. The left and right side surfaces of the concave fulcrum portion and the left and right side surfaces of the convex fulcrum portion are in contact with each other, and the left and right side surfaces of the concave fulcrum portion are gradually narrowed toward each other toward the inner end side. And make one of the left and right side surfaces a semi-cylindrical surface,
By making one side surface of the convex fulcrum portion abutting on one side surface of the concave fulcrum portion a flat surface, a line contact state having one contact line extending in the vertical direction when these both end surfaces are in contact is obtained. By further forming the other side surface of the concave fulcrum portion into a drum-shaped surface having a constricted central portion, and making the other side surface of the convex fulcrum portion abutting the other side surface into a substantially semi-cylindrical surface. A keyboard device for a musical instrument, characterized in that when these two side surfaces come into contact with each other, a point contact state having one contact point at a substantially middle portion in the vertical direction is established.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4317896A JP2848166B2 (en) | 1992-11-02 | 1992-11-02 | Musical instrument keyboard device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4317896A JP2848166B2 (en) | 1992-11-02 | 1992-11-02 | Musical instrument keyboard device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06149229A true JPH06149229A (en) | 1994-05-27 |
| JP2848166B2 JP2848166B2 (en) | 1999-01-20 |
Family
ID=18093267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4317896A Expired - Lifetime JP2848166B2 (en) | 1992-11-02 | 1992-11-02 | Musical instrument keyboard device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2848166B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007328180A (en) * | 2006-06-08 | 2007-12-20 | Yamaha Corp | Keyboard device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54143218U (en) * | 1978-03-29 | 1979-10-04 | ||
| JPS5757417U (en) * | 1980-09-20 | 1982-04-05 |
-
1992
- 1992-11-02 JP JP4317896A patent/JP2848166B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54143218U (en) * | 1978-03-29 | 1979-10-04 | ||
| JPS5757417U (en) * | 1980-09-20 | 1982-04-05 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007328180A (en) * | 2006-06-08 | 2007-12-20 | Yamaha Corp | Keyboard device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2848166B2 (en) | 1999-01-20 |
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