JP2012113144A

JP2012113144A - Electronic music instrument key

Info

Publication number: JP2012113144A
Application number: JP2010262403A
Authority: JP
Inventors: Shin Yamamoto; 信山本; Ichiro Osuga; 一郎大須賀
Original assignee: Yamaha Corp
Current assignee: Yamaha Corp
Priority date: 2010-11-25
Filing date: 2010-11-25
Publication date: 2012-06-14
Anticipated expiration: 2030-11-25
Also published as: JP5874162B2

Abstract

PROBLEM TO BE SOLVED: To provide a key for electronic music instrument integrally formed with a pattern by injection molding having an enhanced appearance and increased release property from a molding die.SOLUTION: A first upper face portion 11a, which is most visually recognizable and also in tactile, is arranged to have a largest surface roughness. A first front face portion 15a and a second front face portion 15b are arranged to have a surface roughness smaller than the surface roughness of the first upper surface portion 11a. A first left side face portion, a second left side face portion and a right side face portion 14 are arranged to have a surface roughness smaller than that of the first front face portion 15a and the second front face portion 15b. A first rear face portion and a second rear face portion are arranged to have a surface roughness smaller than the surface roughness of the first left side face portion, the second left side face portion and the right side face portion 14. A second upper surface portion 11b, a third rear face portion and a bottom face are formed with no pattern.

Description

本発明は、表面に凹凸模様が形成された電子楽器の鍵に関する。 The present invention relates to a key for an electronic musical instrument having a concavo-convex pattern formed on the surface thereof.

従来から、例えば下記特許文献１に示されているように、表面に凹凸を設けて木目調の模様を形成し、木製の鍵を模擬した電子楽器の鍵は知られている。この鍵は、射出成型によって形成される。この射出成型に用いる金型には、木目調の模様を形成するための線状の凹部を設けられており、木目調の模様が一体的に形成される。 2. Description of the Related Art Conventionally, as shown in, for example, Patent Document 1 below, an electronic musical instrument key is known in which a surface is provided with unevenness to form a woodgrain pattern and a wooden key is simulated. This key is formed by injection molding. The mold used for the injection molding is provided with a linear recess for forming a woodgrain pattern, and the woodgrain pattern is integrally formed.

特開２００９−１６９３６１号公報JP 2009-169361 A

しかし、金型の開閉方向が、演奏者によって押される鍵の上面に垂直な方向（上下方向）である場合、鍵の外観及び触感を向上させるために、鍵の前面、後面及び側面の表面粗さを大きくすると、成形された鍵を金型から取り外し難くなる。 However, when the opening and closing direction of the mold is the direction perpendicular to the top surface of the key pressed by the performer (up and down direction), the surface roughness of the front, rear and side surfaces of the key is improved in order to improve the appearance and feel of the key. Increasing the thickness makes it difficult to remove the molded key from the mold.

本発明は上記問題に対処するためになされたもので、その目的は、射出成型により一体的に模様を形成し、鍵の外観を良好にした電子楽器の鍵において、成形した鍵の成形型からの離型性を向上させることにある。なお、下記本発明の各構成要件の記載においては、本発明の理解を容易にするために、後述する実施形態の対応箇所の符号を括弧内に記載しているが、本発明の各構成要件は、実施形態の符号によって示された対応箇所の構成に限定解釈されるべきものではない。 The present invention has been made in order to address the above-described problems, and its object is to provide a key for an electronic musical instrument in which a pattern is integrally formed by injection molding and the appearance of the key is improved. It is to improve the mold release property. In the description of each constituent element of the present invention below, in order to facilitate understanding of the present invention, reference numerals of corresponding portions of the embodiments described later are shown in parentheses, but each constituent element of the present invention is described. Should not be construed as being limited to the configurations of the corresponding portions indicated by the reference numerals of the embodiments.

上記目的を達成するために、本発明の特徴は、上面（１１ａ、２１ａ）、側面（１３ａ、１３ｂ、１４、２３、２４）、前面（１５ａ、１５ｂ、２５ａ、２５ｂ）及び後面（１２ａ，１２ｂ，２２ａ）のうちの少なくとも上面及び側面に凹凸からなる装飾模様が形成された電子楽器の鍵（１０、１０Ａ、２０）において、前記鍵が射出成形により成形され、前記鍵を前記鍵の上下方向に移動させることにより成形型から離型するものであり、かつ、側面の表面粗さが、上面の表面粗さよりも小さく設定されていることにある。これによれば、上面の表面粗さよりも、側面の表面粗さを小さくしたので、成形された鍵のかじり（鍵と成形型との間に発生する大きな摩擦又は引っかかり）を最小限に抑えることができ、鍵を成形型からスムーズに取り外すことができる。なお、鍵を成形型から離型するとき、鍵を斜めに移動させることもあるが、この場合も鍵を上下方向に移動させることに含まれる。また、視覚的及び触覚的に最も目立つ上面に、前記鍵が適用された鍵盤装置において、隣接する鍵が押鍵されたときにのみ認識される側面よりも彫の深い装飾模様を施すことができる。また、側面の表面粗さを小さくしたことにより、側面の抜き勾配を小さくして、上面に対する側面の傾斜角度を垂直に近づけることができるので、鍵の外観を良好にできる。さらに、前記鍵が適用された鍵盤装置において、鍵間の隙間が大きくなることを防止でき、これによって、鍵盤装置の外観を良好にできる。なお、本発明においては、鍵における演奏者によって押される面を上面、演奏者側の面を前面、上面と前面とに隣接する面を側面、演奏者から見て奥側に向いた面を後面とする。 In order to achieve the above object, the present invention is characterized by the top surface (11a, 21a), the side surface (13a, 13b, 14, 23, 24), the front surface (15a, 15b, 25a, 25b) and the rear surface (12a, 12b). , 22a) of the electronic musical instrument key (10, 10A, 20) having a decorative pattern formed of concaves and convexes on at least the upper surface and the side surface, the key is formed by injection molding, and the key is formed in the vertical direction of the key. And the surface roughness of the side surface is set to be smaller than the surface roughness of the upper surface. According to this, since the surface roughness of the side surface is made smaller than the surface roughness of the upper surface, the squeezing of the molded key (large friction or catching generated between the key and the mold) can be minimized. And the key can be smoothly removed from the mold. In addition, when releasing a key from a shaping | molding die, a key may be moved diagonally, but this case is also included in moving a key up and down. In addition, the keyboard device to which the key is applied can be provided with a decorative pattern that is deeper than the side surface that is recognized only when an adjacent key is pressed on the top surface that is most visually and tactilely visible. . Further, by reducing the surface roughness of the side surface, the draft of the side surface can be reduced and the inclination angle of the side surface with respect to the upper surface can be made closer to the vertical, so that the appearance of the key can be improved. Furthermore, in the keyboard device to which the key is applied, it is possible to prevent a gap between the keys from becoming large, thereby making it possible to improve the appearance of the keyboard device. In the present invention, the surface of the key that is pressed by the player is the upper surface, the surface on the player side is the front surface, the surface adjacent to the upper surface and the front surface is the side surface, and the surface facing the back side when viewed from the player is the rear surface. And

また、本発明の他の特徴は、上面、側面、前面及び後面のうちの少なくとも上面及び前面に凹凸からなる装飾模様が形成された電子楽器の鍵において、前記鍵が射出成形により成形され、前記鍵を前記鍵の上下方向に移動させることにより成形型から離型するものであり、かつ、前面の表面粗さが、上面の表面粗さよりも小さく設定されていることにある。これによれば、上面の表面粗さよりも、前面の表面粗さを小さくしたので、成形された鍵のかじり（鍵と成形型との間に発生する大きな摩擦又は引っかかり）を最小限に抑えることができ、鍵を成形型からスムーズに取り外すことができる。なお、鍵を成形型から離型するとき、鍵を斜めに移動させることもあるが、この場合も鍵を上下方向に移動させることに含まれる。また、視覚的及び触覚的に最も目立つ上面に、前記鍵が適用された鍵盤装置において、面積が小さくあまり目立たない前面よりも彫の深い装飾模様を施すことができる。また、前面の表面粗さを小さくしたことにより、前面の抜き勾配を小さくして、上面に対する前面の傾斜角度を垂直に近づけることができるので、鍵の外観を良好にできる。 According to another aspect of the present invention, there is provided a key for an electronic musical instrument in which a decorative pattern made of irregularities is formed on at least the upper surface and the front surface of the upper surface, the side surface, the front surface, and the rear surface. The key is moved away from the mold by moving the key up and down, and the surface roughness of the front surface is set smaller than the surface roughness of the upper surface. According to this, since the surface roughness of the front surface is made smaller than the surface roughness of the upper surface, the squeezing of the molded key (large friction or catching generated between the key and the mold) can be minimized. And the key can be smoothly removed from the mold. In addition, when releasing a key from a shaping | molding die, a key may be moved diagonally, but this case is also included in moving a key up and down. Moreover, in the keyboard device to which the key is applied, the decorative pattern that is deeper than the front surface that has a small area and is not so conspicuous can be applied to the top surface that is most visually and tactilely conspicuous. Further, by reducing the surface roughness of the front surface, the draft angle of the front surface can be reduced, and the inclination angle of the front surface with respect to the upper surface can be made closer to the vertical, so that the appearance of the key can be improved.

また、本発明の他の特徴は、上面、側面、前面及び後面のうちの少なくとも側面及び前面に凹凸からなる装飾模様が形成された電子楽器の鍵において、前記鍵が射出成形により成形され、前記鍵を前記鍵の上下方向に移動させることにより成形型から離型するものであり、かつ、側面の表面粗さが、前面の表面粗さよりも小さく設定されていることにある。前面は面積が小さく、視覚的及び触覚的に目立ち難いが、前記鍵が適用された鍵盤装置において、隣接する鍵が押鍵されたときにのみ認識される側面の方がより目立ち難い。そこで、前面の表面粗さよりも側面の表面粗さを小さくした。これによれば、成形された鍵のかじり（鍵と成形型との間に発生する大きな摩擦又は引っかかり）を最小限に抑えることができ、鍵を成形型からスムーズに取り外すことができる。なお、鍵を成形型から離型するとき、鍵を斜めに移動させることもあるが、この場合も鍵を上下方向に移動させることに含まれる。また、側面に比べれば視覚的及び触覚的に目立つ前面に彫の深い装飾模様を施すことができる。また、側面の表面粗さを小さくしたことにより、側面の抜き勾配を小さくして、上面に対する側面の傾斜角度を垂直に近づけることができるので、鍵の外観を良好にできる。さらに、前記鍵が適用された鍵盤装置において、鍵間の隙間が大きくなることを防止でき、これによって、鍵盤装置の外観を良好にできる。 According to another aspect of the present invention, there is provided a key for an electronic musical instrument in which a decorative pattern including irregularities is formed on at least the side surface and the front surface of the top surface, the side surface, the front surface, and the rear surface. The key is released from the mold by moving the key in the vertical direction, and the surface roughness of the side surface is set to be smaller than the surface roughness of the front surface. The front surface has a small area and is less visually and tactilely conspicuous, but in the keyboard device to which the key is applied, the side surface recognized only when an adjacent key is pressed is more inconspicuous. Therefore, the surface roughness of the side surface is made smaller than the surface roughness of the front surface. According to this, it is possible to minimize the biting of the molded key (large friction or catching generated between the key and the mold), and it is possible to remove the key smoothly from the mold. In addition, when releasing a key from a shaping | molding die, a key may be moved diagonally, but this case is also included in moving a key up and down. Further, a deeply engraved decorative pattern can be applied to the front surface that is visually and tactilely conspicuous compared to the side surface. Further, by reducing the surface roughness of the side surface, the draft of the side surface can be reduced and the inclination angle of the side surface with respect to the upper surface can be made closer to the vertical, so that the appearance of the key can be improved. Furthermore, in the keyboard device to which the key is applied, it is possible to prevent a gap between the keys from becoming large, thereby making it possible to improve the appearance of the keyboard device.

また、本発明の他の特徴は、上面、側面、前面及び後面のうちの少なくとも上面及び後面に凹凸からなる装飾模様が形成された電子楽器の鍵において、前記鍵が射出成形により成形され、前記鍵を前記鍵の上下方向に移動させることにより成形型から離型するものであり、かつ、後面の表面粗さが、上面の表面粗さよりも小さく設定されていることにある。これによれば、上面の表面粗さよりも、後面の表面粗さを小さくしたので、成形された鍵のかじり（鍵と成形型との間に発生する大きな摩擦又は引っかかり）を最小限に抑えることができ、鍵を成形型からスムーズに取り外すことができる。なお、鍵を成形型から離型するとき、鍵を斜めに移動させることもあるが、この場合も鍵を上下方向に移動させることに含まれる。また、視覚的及び触覚的に最も目立つ上面に、前記鍵が適用された鍵盤装置において、ほとんど認識されることのない後面よりも彫の深い装飾模様を施すことができる。また、後面の表面粗さを小さくしたことにより、後面の抜き勾配を小さくして、上面に対する後面の傾斜角度を垂直に近づけることができるので、鍵の外観を良好にできる。 According to another aspect of the present invention, there is provided a key for an electronic musical instrument in which a decorative pattern including irregularities is formed on at least the upper surface and the rear surface of the upper surface, the side surface, the front surface, and the rear surface, the key is formed by injection molding, The key is moved away from the mold by moving the key in the vertical direction of the key, and the surface roughness of the rear surface is set smaller than the surface roughness of the upper surface. According to this, since the surface roughness of the rear surface is made smaller than the surface roughness of the upper surface, the squeezing of the molded key (large friction or catching generated between the key and the mold) can be minimized. And the key can be smoothly removed from the mold. In addition, when releasing a key from a shaping | molding die, a key may be moved diagonally, but this case is also included in moving a key up and down. In addition, on the top surface that is most visually and tactilely visible, the keyboard device to which the key is applied can be provided with a decorative pattern deeper than the rear surface that is hardly recognized. Further, by reducing the surface roughness of the rear surface, the draft angle of the rear surface can be reduced and the inclination angle of the rear surface with respect to the upper surface can be made closer to the vertical, so that the appearance of the key can be improved.

また、本発明の他の特徴は、上面、側面、前面及び後面のうちの少なくとも側面又は前面に凹凸からなる装飾模様が形成された電子楽器の鍵において、前記鍵が射出成形により成形され、前記鍵を前記鍵の上下方向に移動させることにより成形型から離型するものであり、かつ、側面及び前面のうちの一方又は両方が下部側部分と上部側部分とで構成され、下部側部分の表面粗さが上部側部分の表面粗さよりも小さく設定されていることにある。前記鍵が適用された鍵盤装置において、側面は、隣接する鍵が押鍵されたときにのみ視覚的及び触覚的に認識されるが、このとき、上部に比べて下部の方が目立ち難い。また、白鍵及び黒鍵の前面の上部側部分の模様は、押鍵時及び非押鍵時のいずれの状態においても認識される。一方、白鍵の前面の下部側部分は、押鍵時において、鍵盤装置内部に入り込むため、前面の下部側部分の模様は目立ち難い。また、黒鍵の前面の下部側部分は、隣接する鍵が押鍵されたときにのみ認識される。そこで、側面及び前面のうちの一方、又は両方の下部側部分の表面粗さを、上部側部分の表面粗さよりもそれぞれ小さくした。これによれば、成形された鍵のかじり（鍵と成形型との間に発生する大きな摩擦又は引っかかり）を最小限に抑えることができ、鍵を成形型からスムーズに取り外すことができる。なお、鍵を成形型から離型するとき、鍵を斜めに移動させることもあるが、この場合も鍵を上下方向に移動させることに含まれる。また、側面の下部側部分に比べて上部側部分に彫の深い装飾模様を施すことができる。また、前面の下部側部分に比べて上部側部分に彫の深い装飾模様を施すことができる。また、側面の上部側部分の表面粗さよりも下部側部分の表面粗さを小さくすることにより、側面の下部側部分の抜き勾配を小さくして、上面に垂直に近づけることができるので、鍵の外観を良好にできる。さらに、前記鍵が適用された鍵盤装置において、鍵間の隙間が大きくなることを防止でき、これによって、鍵盤装置の外観を良好にできる。また、前面の上部側部分の表面粗さよりも下部側部分の表面粗さを小さくすることにより、前面の下部側部分の抜き勾配を小さくして、上面に垂直に近づけることができるので、鍵の外観を良好にできる。 According to another aspect of the present invention, there is provided an electronic musical instrument key in which a decorative pattern including irregularities is formed on at least a side surface or a front surface of an upper surface, a side surface, a front surface, and a rear surface, the key is formed by injection molding, The key is moved away from the mold by moving the key up and down, and one or both of the side surface and the front surface are composed of a lower side portion and an upper side portion, The surface roughness is set to be smaller than the surface roughness of the upper side portion. In the keyboard device to which the key is applied, the side surface is recognized visually and tactilely only when an adjacent key is pressed, but at this time, the lower part is less noticeable than the upper part. Further, the pattern of the upper side portion of the front surface of the white key and the black key is recognized in any state when the key is pressed and when the key is not pressed. On the other hand, since the lower part of the front side of the white key enters the keyboard device when the key is pressed, the pattern of the lower part of the front part is not noticeable. The lower part of the front side of the black key is recognized only when an adjacent key is pressed. Therefore, the surface roughness of the lower side portion of one or both of the side surface and the front surface is made smaller than the surface roughness of the upper side portion. According to this, it is possible to minimize the biting of the molded key (large friction or catching generated between the key and the mold), and it is possible to remove the key smoothly from the mold. In addition, when releasing a key from a shaping | molding die, a key may be moved diagonally, but this case is also included in moving a key up and down. Further, a deeply engraved decorative pattern can be applied to the upper side portion as compared with the lower side portion of the side surface. Further, a deeply engraved decorative pattern can be applied to the upper side portion as compared with the lower side portion of the front surface. In addition, by making the surface roughness of the lower side portion smaller than the surface roughness of the upper side portion of the side surface, the draft angle of the lower side portion of the side surface can be made smaller and closer to the top surface. Appearance can be improved. Furthermore, in the keyboard device to which the key is applied, it is possible to prevent a gap between the keys from becoming large, thereby making it possible to improve the appearance of the keyboard device. In addition, by making the surface roughness of the lower side portion smaller than the surface roughness of the upper side portion of the front surface, the draft angle of the lower side portion of the front surface can be made smaller and closer to the upper surface, so Appearance can be improved.

本発明の一実施形態に係る白鍵を斜め前方から見た斜視図である。It is the perspective view which looked at the white key which concerns on one Embodiment of this invention from diagonally forward. 図１Ａの白鍵を斜め後方から見た斜視図である。It is the perspective view which looked at the white key of FIG. 1A from diagonally backward. 本発明の一実施形態に係る黒鍵を斜め前方から見た斜視図である。It is the perspective view which looked at the black key which concerns on one Embodiment of this invention from diagonally forward. 図２Ａの黒鍵を斜め後方から見た斜視図である。It is the perspective view which looked at the black key of FIG. 2A from diagonally backward. 本発明の変形例に係る白鍵を斜め前方から見た斜視図である。It is the perspective view which looked at the white key which concerns on the modification of this invention from diagonally forward. 図３Ａの白鍵を斜め後方から見た斜視図である。It is the perspective view which looked at the white key of FIG. 3A from diagonally backward.

以下、本発明の一実施形態に係る電子楽器の白鍵１０及び黒鍵２０について図１Ａ及び図１Ｂ並びに図２Ａ及び図２Ｂを用いて説明する。この白鍵１０及び黒鍵２０は、電子楽器の鍵盤装置を構成する部材であり、演奏者によって押鍵されて、演奏情報を入力するための部材である。以下の説明においては、白鍵１０及び黒鍵２０が鍵盤装置のフレームに組み付けられたとき、演奏者側から見て低音部側を左側とし、高音部側を右側とする。また、演奏者の手前側を前側とし、奥側を後側とする。図１Ａ及び図１Ｂに示す白鍵１０並びに図２Ａ及び図２Ｂに示す黒鍵２０は、硬質の合成樹脂による一体成型により、下方に開放された箱状に形成される。ただし、白鍵１０及び黒鍵２０は、下方に開放されていなくてもよい。すなわち、中実であってもよい。 Hereinafter, a white key 10 and a black key 20 of an electronic musical instrument according to an embodiment of the present invention will be described with reference to FIGS. 1A and 1B and FIGS. 2A and 2B. The white key 10 and the black key 20 are members constituting a keyboard device of an electronic musical instrument, and are members for inputting performance information when pressed by a player. In the following description, when the white key 10 and the black key 20 are assembled to the frame of the keyboard device, the bass part side is the left side and the treble part side is the right side when viewed from the player side. Also, the front side of the performer is the front side, and the back side is the rear side. The white key 10 shown in FIGS. 1A and 1B and the black key 20 shown in FIGS. 2A and 2B are formed into a box shape opened downward by integral molding with a hard synthetic resin. However, the white key 10 and the black key 20 do not have to be opened downward. That is, it may be solid.

白鍵１０の後端部には、前部側よりも低くなった段部１０ａが形成されている。白鍵１０は、この段部１０ａにて、鍵盤装置のフレームに揺動可能に支持される。また、白鍵１０の左側後部側には、黒鍵２０を配置するための切り欠き部１０ｂが形成されている。なお、図１Ａ及び図１Ｂに示す例においては、切り欠き部１０ｂは、鍵の左側に設けられているが、白鍵１０は、音名（Ｃ，Ｄ，Ｅ，Ｆ，Ｇ，Ａ及びＢ）ごとに切り欠き部１０ｂが設けられる位置が異なる。すなわち、切り欠き部１０ｂが鍵の右側又は左右両側に設けられる鍵もある。鍵盤装置において黒鍵２０に隣接しない白鍵１０には、切り欠き部１０ｂが設けられていない。また、白鍵１０の前端部には、上端部の薄い部分が僅かに前方に突出した突出部１０ｃが形成されている。この突出部１０ｃは、外観を良好にするために設けられているものである。 A step portion 10 a that is lower than the front side is formed at the rear end portion of the white key 10. The white key 10 is swingably supported by the frame of the keyboard device at the step portion 10a. Further, a notch portion 10 b for arranging the black key 20 is formed on the left rear side of the white key 10. In the example shown in FIGS. 1A and 1B, the notch portion 10b is provided on the left side of the key, but the white key 10 has the pitch names (C, D, E, F, G, A, and B). ), The position where the notch 10b is provided is different. That is, there is a key in which the notch 10b is provided on the right side or both the left and right sides of the key. The white key 10 that is not adjacent to the black key 20 in the keyboard device is not provided with the notch 10b. Further, the front end portion of the white key 10 is formed with a protruding portion 10c in which a thin portion of the upper end portion protrudes slightly forward. This protrusion 10c is provided to improve the appearance.

白鍵１０の上面部１１は、第１上面部１１ａ及び第２上面部１１ｂから構成されている。第１上面部１１ａ及び第２上面部１１ｂは、それぞれ左右方向よりも前後方向の方が長い板状に形成されている。第１上面部１１ａの左側後部は、切り欠き部１０ｂを形成するために切り欠かれている。第２上面部１１ｂは、第１上面部１１ａの後側に位置し、第１上面部１１ａよりも低くなっている。すなわち、第２上面部１１ｂが、段部１０ａの上面部に相当する。また、白鍵１０の後面部１２は、第１後面部１２ａ、第２後面部１２ｂ及び第３後面部１２ｃから構成されている。そして、第１上面部１１ａの後端と第２上面部１１ｂの前端は、左右方向かつ上下方向に延設された板状の第１後面部１２ａによって連結されている。 The upper surface portion 11 of the white key 10 includes a first upper surface portion 11a and a second upper surface portion 11b. The first upper surface portion 11a and the second upper surface portion 11b are each formed in a plate shape that is longer in the front-rear direction than in the left-right direction. The left rear portion of the first upper surface portion 11a is cut out to form a cutout portion 10b. The second upper surface portion 11b is located on the rear side of the first upper surface portion 11a and is lower than the first upper surface portion 11a. That is, the second upper surface portion 11b corresponds to the upper surface portion of the step portion 10a. Further, the rear surface portion 12 of the white key 10 includes a first rear surface portion 12a, a second rear surface portion 12b, and a third rear surface portion 12c. The rear end of the first upper surface portion 11a and the front end of the second upper surface portion 11b are connected by a plate-shaped first rear surface portion 12a extending in the left-right direction and the vertical direction.

また、白鍵１０の左側面部１３は、第１左側面部１３ａ及び第２左側面部１３ｂから構成されている。第１左側面部１３ａ及び第２左側面部１３ｂは、それぞれ上下方向よりも前後方向の方が長い板状に形成されている。第１左側面部１３ａは、切り欠き部１０ｂより前方の部分の側面部であり、第２左側面部１３ｂは、切り欠き部１０ｂの側面部である。第１左側面部１３ａの後端と第２左側面部１３ｂの前端は、上下方向かつ左右方向に延設された板状の第２後面部１２ｂによって連結されている。すなわち、第２後面部１２ｂが、切り欠き部１０ｂの前面部に相当する。 Further, the left side surface portion 13 of the white key 10 includes a first left side surface portion 13a and a second left side surface portion 13b. The first left side surface portion 13a and the second left side surface portion 13b are each formed in a plate shape that is longer in the front-rear direction than in the vertical direction. The first left side surface portion 13a is a side surface portion in front of the notch portion 10b, and the second left side surface portion 13b is a side surface portion of the notch portion 10b. The rear end of the first left side surface portion 13a and the front end of the second left side surface portion 13b are connected by a plate-like second rear surface portion 12b extending in the vertical direction and the horizontal direction. That is, the second rear surface portion 12b corresponds to the front surface portion of the notch portion 10b.

また、白鍵１０の右側面部１４は、上下方向よりも前後方向の方が長い板状に形成されている。第２左側面部１３ｂ及び右側面部１４の後部の上端部は、段部１０ａを形成するために切り欠かれている。そして、第２上面部１１ｂ、左側面部１３及び右側面部１４の後端は、左右方向かつ上下方向に延設された板状の第３後面部１２ｃによって連結されている。また、第１左側面部１３ａと右側面部１４の前端の上端部は僅かに前方に突出していて、突出部１０ｃの側面部を構成している。また、白鍵１０の前面部１５は、第１前面部１５ａ及び第２前面部１５ｂからなる。第１上面部１１ａの前端並びに第１左側面部１３ａ及び右側面部１４の前端の上端部（すなわち、僅かに前方に突出した部分）は、左右方向かつ上下方向に延設された板状の第１前面部１５ａによって連結されている。また、第１左側面部１３ａ及び右側面部１４の前端の下部（すなわち、前方に突出した部分以外の部分）は、左右方向かつ上下方向に延設された板状の第２前面部１５ｂによって連結されている。第１前面部１５ａの下端と第２前面部１５ｂの上端は、左右方向かつ水平方向に延設された下面部１６によって連結されている。 Further, the right side surface portion 14 of the white key 10 is formed in a plate shape whose longitudinal direction is longer than the vertical direction. The upper ends of the rear portions of the second left side surface portion 13b and the right side surface portion 14 are notched to form a stepped portion 10a. The rear ends of the second upper surface portion 11b, the left side surface portion 13, and the right side surface portion 14 are connected by a plate-shaped third rear surface portion 12c extending in the left-right direction and the vertical direction. Moreover, the upper end part of the front end of the 1st left side surface part 13a and the right side surface part 14 protrudes slightly forward, and comprises the side part of the protrusion part 10c. Further, the front surface portion 15 of the white key 10 includes a first front surface portion 15a and a second front surface portion 15b. The front end of the first upper surface portion 11a and the upper end portions of the front ends of the first left side surface portion 13a and the right side surface portion 14 (that is, the portion slightly protruding forward) are plate-like first extending in the left-right direction and the up-down direction. It is connected by the front part 15a. Further, lower portions of the front ends of the first left side surface portion 13a and the right side surface portion 14 (that is, portions other than the portion protruding forward) are connected by a plate-like second front surface portion 15b extending in the left-right direction and the vertical direction. ing. The lower end of the first front surface portion 15a and the upper end of the second front surface portion 15b are connected by a lower surface portion 16 extending in the left-right direction and the horizontal direction.

白鍵１０の第１後面部１２ａ、第２後面部１２ｂ、第３後面部１２ｃ、第１左側面部１３ａ、第２左側面部１３ｂ、右側面部１４、第１前面部１５ａ及び第２前面部１５ｂには、抜き勾配が設けられている。第１後面部１２ａ、第２後面部１２ｂ、第３後面部１２ｃ、第１前面部１５ａ及び第２前面部１５ｂの抜き勾配は、それぞれ０°〜４５°、望ましくは、０°〜５°、さらに望ましくは０°〜３°に設定されている。第１左側面部１３ａ、第２左側面部１３ｂ及び右側面部１４の抜き勾配は、それぞれ０°〜８°、望ましくは０°〜３°、さらに望ましくは０°〜１°に設定されている。 On the first rear surface portion 12a, the second rear surface portion 12b, the third rear surface portion 12c, the first left side surface portion 13a, the second left side surface portion 13b, the right side surface portion 14, the first front surface portion 15a and the second front surface portion 15b of the white key 10. Is provided with a draft angle. The draft angles of the first rear surface portion 12a, the second rear surface portion 12b, the third rear surface portion 12c, the first front surface portion 15a and the second front surface portion 15b are 0 ° to 45 °, preferably 0 ° to 5 °, respectively. More desirably, the angle is set to 0 ° to 3 °. The drafts of the first left side surface portion 13a, the second left side surface portion 13b, and the right side surface portion 14 are set to 0 ° to 8 °, desirably 0 ° to 3 °, and more desirably 0 ° to 1 °.

白鍵１０の第１上面部１１ａ、第１後面部１２ａ、第２後面部１２ｂ、第１左側面部１３ａ、第２左側面部１３ｂ、右側面部１４及び前面部１５の表面には凹凸により木目調の模様が形成されている。第１上面部１１ａの表面には、前後方向に延びる複数の線状かつ凸状の第１上面凸部３１ａがそれぞれ左右に間隔を保って配置されていて、凹凸のある柾目模様が形成されている。また、第１左側面部１３ａ、第２左側面部１３ｂ及び右側面部１４の表面には、前後方向に延びる線状かつ凸状の、複数の第１左側面凸部３３ａ、第２左側面凸部３３ｂ及び右側面凸部３４がそれぞれ上下に間隔を保って配置されていて、凹凸のある柾目模様が形成されている。また、第１後面部１２ａ、第２後面部１２ｂ、第１前面部１５ａ及び第２前面部１５ｂの表面には、演奏者側から見て左側よりも右側が下方に位置するように傾斜して左右に延びる線状かつ凸状の、複数の第１後面凸部３２ａ、第２後面凸部３２ｂ、第１前面凸部３５ａ及び第２前面凸部３５ｂが上下に間隔を保って配置されていて、凹凸のある年輪模様が形成されている。第２上面部１１ｂ、第３後面部１２ｃ及び下面部１６は、演奏者に視覚的及び触覚的に認識されないので、模様が形成されず、平面状に形成されている。 The surface of the first upper surface portion 11a, the first rear surface portion 12a, the second rear surface portion 12b, the first left side surface portion 13a, the second left side surface portion 13b, the right side surface portion 14 and the front surface portion 15 of the white key 10 has a grainy texture due to unevenness. A pattern is formed. On the surface of the first upper surface portion 11a, a plurality of linear and convex first upper surface convex portions 31a extending in the front-rear direction are arranged at intervals on the left and right sides, and an uneven grid pattern is formed. Yes. Further, on the surfaces of the first left side surface portion 13a, the second left side surface portion 13b, and the right side surface portion 14, a plurality of first left side surface convex portions 33a and second left side surface convex portions 33b that are linear and convex extending in the front-rear direction. And the right side convex part 34 is arrange | positioned at intervals up and down, respectively, and the uneven | corrugated checkerboard pattern is formed. Further, the surfaces of the first rear surface portion 12a, the second rear surface portion 12b, the first front surface portion 15a, and the second front surface portion 15b are inclined so that the right side is positioned below the left side as viewed from the player side. A plurality of linear and convex first and second rear surface convex portions 32a, second rear surface convex portions 32b, first front surface convex portions 35a and second front surface convex portions 35b extending in the left-right direction are arranged at intervals in the vertical direction. An uneven ring pattern is formed. Since the second upper surface portion 11b, the third rear surface portion 12c, and the lower surface portion 16 are not visually and tactilely recognized by the performer, a pattern is not formed and the planar surface is formed.

端部が第１上面部１１ａの右側の縁部に到達している１つの第１上面凸部３１ａは、端部が右側面部１４の上側の縁部に到達している右側面凸部３４のうちの１つの右側面凸部３４に、第１上面部１１ａと右側面部１４とが交わる縁部にて繋がっている。また、端部が第１上面部１１ａの左側の縁部かつ第１左側面部１３ａの上側の縁部に到達している１つの第１上面凸部３１ａは、端部が第１左側面部１３ａの上側の縁部に到達している第１左側面凸部３３ａのうちの１つの第１左側面凸部３３ａに、第１上面部１１ａと第１左側面部１３ａが交わる縁部にて繋がっている。また、端部が第１上面部１１ａの左側の縁部かつ第２左側面部１３ｂの上側の縁部に到達している１つの第１上面凸部３１ａは、端部が第２左側面部１３ｂの上側の縁部に到達している第２左側面凸部３３ｂのうちの１つの第２左側面凸部３３ｂに、第１上面部１１ａと第２左側面部１３ｂが交わる縁部にて繋がっている。 One first upper surface convex portion 31a whose end portion reaches the right edge portion of the first upper surface portion 11a is one of the right side surface convex portion 34 whose end portion reaches the upper edge portion of the right side surface portion 14. One right side convex portion 34 is connected to an edge where the first upper surface portion 11a and the right side surface portion 14 intersect. In addition, one first upper surface convex portion 31a whose end portion reaches the left edge portion of the first upper surface portion 11a and the upper edge portion of the first left side surface portion 13a has an end portion of the first left side surface portion 13a. One first left side convex portion 33a out of the first left side convex portions 33a reaching the upper edge is connected at the edge where the first upper surface portion 11a and the first left side surface portion 13a intersect. . Further, one first upper surface convex portion 31a whose end reaches the left edge of the first upper surface portion 11a and the upper edge of the second left surface portion 13b has an end portion of the second left surface portion 13b. One second left side convex portion 33b out of the second left side convex portions 33b reaching the upper edge is connected to an edge where the first upper surface portion 11a and the second left side surface portion 13b intersect. .

また、端部が第１上面部１１ａの前側に到達している１つの第１上面凸部３１ａは、端部が第１前面部１５ａの上側の縁部に到達している第１前面凸部３５ａのうちの１つの第１前面凸部３５ａに、第１上面部１１ａと第１前面部１５ａが交わる縁部にて繋がっている。また、端部が第１上面部１１ａの後側に到達している１つの第１上面凸部３１ａは、端部が第１後面部１２ａの上部の縁部に到達している第１後面凸部３２ａのうちの１つの第１後面凸部３２ａに、第１上面部１１ａと第２後面部１２ａが交わる縁部にて繋がっている。また、端部が第１上面部１１ａの後ろ側の縁部かつ第２後面部１２ｂの上側の縁部に到達している１つの第１上面凸部３１ａは、端部が第２後面部１２ｂの上部の縁部に到達している第２後面凸部３２ｂのうちの１つの第２後面凸部３２ｂに、第１上面部１１ａと第２後面部１２ｂが交わる縁部にて繋がっている。 One first upper surface convex portion 31a whose end portion reaches the front side of the first upper surface portion 11a is a first front surface convex portion whose end portion reaches the upper edge portion of the first front surface portion 15a. The first front surface convex portion 35a of 35a is connected at the edge where the first upper surface portion 11a and the first front surface portion 15a intersect. Further, one first upper surface convex portion 31a whose end portion reaches the rear side of the first upper surface portion 11a is a first rear surface convex portion whose end portion reaches the upper edge of the first rear surface portion 12a. One of the portions 32a is connected to one first rear surface convex portion 32a at an edge where the first upper surface portion 11a and the second rear surface portion 12a intersect. In addition, one first upper surface convex portion 31a whose end portion reaches the rear edge portion of the first upper surface portion 11a and the upper edge portion of the second rear surface portion 12b has an end portion that is the second rear surface portion 12b. The second rear surface convex portion 32b of the second rear surface convex portions 32b reaching the upper edge portion of the first upper surface portion 11b is connected at the edge portion where the first upper surface portion 11a and the second rear surface portion 12b intersect.

第１左側面凸部３３ａ、第２左側面凸部３３ｂ及び右側面凸部３４、第１後面凸部３２ａ、第２後面凸部３２ｂ、第１前面凸部３５ａ及び第２前面凸部３５ｂについても同様に、互いに隣接する各面部に設けられた線状の凸部に繋がっている。なお、上記のように下面部１６は鏡面状に形成されているので、第１前面凸部３５ａと第２前面凸部３５ｂは、実際には繋がっていないが、第１前面部１５ａと第２前面部１５ｂの前後方向のずれは僅かなので、第１前面凸部３５ａの下端部と第２前面凸部３５ｂの上端部の左右方向の位置を合わせておけば、演奏者側から前面部１５を見たときに、１つの模様として認識でき、違和感を生じさせないようにすることができる。 About the 1st left side convex part 33a, the 2nd left side convex part 33b, the right side convex part 34, the 1st back surface convex part 32a, the 2nd back surface convex part 32b, the 1st front surface convex part 35a, and the 2nd front surface convex part 35b Similarly, it is connected to a linear convex portion provided on each surface portion adjacent to each other. In addition, since the lower surface part 16 is formed in the mirror surface shape as described above, the first front surface convex part 35a and the second front surface convex part 35b are not actually connected, but the first front surface part 15a and the second front surface convex part 35b are not connected. Since the front portion 15b is slightly displaced in the front-rear direction, if the left and right positions of the lower end portion of the first front convex portion 35a and the upper end portion of the second front convex portion 35b are matched, the front portion 15 is moved from the player side. When viewed, it can be recognized as a single pattern, so that a sense of incongruity can be prevented.

第１上面凸部３１ａの突出高さは、０．０１ｍｍ〜１ｍｍ、望ましくは０．０２ｍｍ〜０．５ｍｍ、さらに望ましくは０．０５ｍｍ〜０．３ｍｍに設定されている。第１前面凸部３５ａ及び第２前面凸部３５ｂの突出高さは、それぞれ０．０１ｍｍ〜０．９ｍｍ、望ましくは０．０２ｍｍ〜０．４ｍｍ、さらに望ましくは０．０５ｍｍ〜０．２ｍｍに設定されている。第１左側面凸部３３ａ、第２左側面凸部３３ｂ及び右側面凸部３４の突出高さは、それぞれ０．０１ｍｍ〜０．８ｍｍ、望ましくは０．０２ｍｍ〜０．３ｍｍ、さらに望ましくは０．０５ｍｍ〜０．１ｍｍに設定されている。第１後面凸部３２ａ及び第２後面凸部３２ｂの突出高さは、それぞれ０．０１ｍｍ〜０．８ｍｍ、望ましくは０．０２ｍｍ〜０．３ｍｍ、さらに望ましくは０．０５ｍｍ〜０．１ｍｍに設定されている。そして、第１上面凸部３１ａの間隔は、０．０３ｍｍ〜２２ｍｍ、望ましくは０．０５ｍｍ〜１２ｍｍ、さらに望ましくは０．０８ｍｍ〜８ｍｍに設定されている。また、第１前面凸部３５ａ及び第２前面凸部３５ｂの間隔は、それぞれ０．０３ｍｍ〜２２ｍｍ、望ましくは０．０５ｍｍ〜１２ｍｍ、さらに望ましくは０．０８ｍｍ〜８ｍｍに設定されている。第１左側面凸部３３ａ、第２左側面凸部３３ｂ及び右側面凸部３４の間隔は、それぞれ０．０３ｍｍ〜２２ｍｍ、望ましくは０．０５ｍｍ〜１２ｍｍ、さらに望ましくは０．０８ｍｍ〜８ｍｍに設定されている。第１後面凸部３２ａ及び第２後面凸部３２ｂの間隔は、それぞれ０．０３ｍｍ〜２２ｍｍ、望ましくは０．０５ｍｍ〜１２ｍｍ、さらに望ましくは０．０８ｍｍ〜８ｍｍに設定されている。第１上面部１１ａの表面の算術平均粗さＲａは、０．５μｍ〜７μｍ、望ましくは０．５μｍ〜４μｍに設定されている。第１左側面部１３ａ、第２左側面部１３ｂ及び右側面部１４の算術平均粗さＲａは、０．０３μｍ〜５．０μｍ、望ましくは０．０３μｍ〜２．０μｍに設定されている。また、第１前面部１５ａ及び第２前面部１５ｂの算術平均粗さＲａは、０．０５μｍ〜６．０μｍ、望ましくは０．０５μｍ〜３．０μｍに設定されている。第１後面部１２ａ、第２後面部１２ｂの算術平均粗さＲａは、０．０３μｍ〜５．０μｍ、望ましくは０．０３μｍ〜２．０μｍに設定されている。 The protrusion height of the first upper surface protrusion 31a is set to 0.01 mm to 1 mm, desirably 0.02 mm to 0.5 mm, and more desirably 0.05 mm to 0.3 mm. The protrusion heights of the first front surface convex portion 35a and the second front surface convex portion 35b are each set to 0.01 mm to 0.9 mm, desirably 0.02 mm to 0.4 mm, and more desirably 0.05 mm to 0.2 mm. Has been. The protrusion heights of the first left side convex portion 33a, the second left side convex portion 33b, and the right side convex portion 34 are each 0.01 mm to 0.8 mm, desirably 0.02 mm to 0.3 mm, and more desirably 0. .05 mm to 0.1 mm. The protrusion heights of the first rear surface convex portion 32a and the second rear surface convex portion 32b are each set to 0.01 mm to 0.8 mm, desirably 0.02 mm to 0.3 mm, and more desirably 0.05 mm to 0.1 mm. Has been. And the space | interval of the 1st upper surface convex part 31a is set to 0.03 mm-22 mm, Preferably it is 0.05 mm-12 mm, More preferably, it is set to 0.08 mm-8 mm. Moreover, the space | interval of the 1st front surface convex part 35a and the 2nd front surface convex part 35b is set to 0.03 mm-22 mm, respectively 0.05 mm-12 mm, and further desirably 0.08 mm-8 mm. The intervals between the first left side convex portion 33a, the second left side convex portion 33b, and the right side convex portion 34 are set to 0.03 mm to 22 mm, preferably 0.05 mm to 12 mm, and more preferably 0.08 mm to 8 mm. Has been. The distance between the first rear surface convex portion 32a and the second rear surface convex portion 32b is set to 0.03 mm to 22 mm, desirably 0.05 mm to 12 mm, and more desirably 0.08 mm to 8 mm. The arithmetic average roughness Ra of the surface of the first upper surface portion 11a is set to 0.5 μm to 7 μm, desirably 0.5 μm to 4 μm. The arithmetic average roughness Ra of the first left side surface portion 13a, the second left side surface portion 13b, and the right side surface portion 14 is set to 0.03 μm to 5.0 μm, desirably 0.03 μm to 2.0 μm. In addition, the arithmetic average roughness Ra of the first front surface portion 15a and the second front surface portion 15b is set to 0.05 μm to 6.0 μm, desirably 0.05 μm to 3.0 μm. The arithmetic average roughness Ra of the first rear surface portion 12a and the second rear surface portion 12b is set to 0.03 μm to 5.0 μm, desirably 0.03 μm to 2.0 μm.

黒鍵２０も、白鍵１０と同様に、板状の上面部２１、後面部２２、左側面部２３、右側面部２４及び前面部２５から構成されている。また、黒鍵２０の後端部には、前部側よりも低くなった支持部２０ａが形成されている。黒鍵２０は、この支持部２０ａにて、鍵盤装置のフレームに揺動可能に支持される。なお、黒鍵２０には、白鍵１０の切り欠き部１０ｂのような隣合う鍵を配置するための切り欠き部は設けられていないが、前端部の上部を斜めに切り欠いた切り欠き部２０ｂが設けられている。黒鍵２０の形状は、音名（Ｃ＃，Ｄ＃，Ｆ＃，Ｇ＃及びＡ＃）によらず一定である。また、黒鍵２０には、白鍵１０の突出部１０ｃのような突出部は設けられていない。上面部２１は、白鍵１０の上面部１１と同様に、第１上面部２１ａ及び第２上面部２１ｂからなる。後面部２２は、第１後面部１２ａ及び第２後面部２２ｂからなる。第２上面部２１ｂが支持部２０ａの上面部である。第１上面部２１ａの後端と第２上面部２１ｂの前端は、第１後面部２２ａによって連結されている。また、左側面部２３及び右側面部２４の後端は、第２後面部２２ｂによって連結されている。また、第１上面部２１ａの前端は、左側面部２３及び右側面部２４の前端よりもやや後方に位置している。左側面部２３及び右側面部２４の前端部の上部は、切り欠き部２０ｂを形成するために斜めに切り欠かれている。前面部２５は、第１前面部２５ａ及び第２前面部２５ｂからなる。第１上面部２１ａの前端、左側面部２３及び右側面部２４の前端部の上部であって斜めに切り欠かれた部分は、第１前面部２５ａによって連結されている。そして、第１前面部２５ａの下端、左側面部２３の前端及び右側面部２４の前端は、第２前面部２５ｂによって連結されている。 Similarly to the white key 10, the black key 20 includes a plate-like upper surface portion 21, rear surface portion 22, left side surface portion 23, right side surface portion 24, and front surface portion 25. In addition, a support portion 20 a that is lower than the front side is formed at the rear end portion of the black key 20. The black key 20 is supported by the frame of the keyboard device so as to be swingable by the support portion 20a. The black key 20 is not provided with a notch portion for arranging adjacent keys such as the notch portion 10b of the white key 10, but a notch portion in which the upper portion of the front end portion is notched obliquely. 20b is provided. The shape of the black key 20 is constant regardless of the pitch name (C #, D #, F #, G #, and A #). Further, the black key 20 is not provided with a protruding portion such as the protruding portion 10 c of the white key 10. The upper surface portion 21 includes a first upper surface portion 21a and a second upper surface portion 21b, similarly to the upper surface portion 11 of the white key 10. The rear surface portion 22 includes a first rear surface portion 12a and a second rear surface portion 22b. The second upper surface portion 21b is the upper surface portion of the support portion 20a. The rear end of the first upper surface portion 21a and the front end of the second upper surface portion 21b are connected by the first rear surface portion 22a. Further, the rear ends of the left side surface portion 23 and the right side surface portion 24 are connected by a second rear surface portion 22b. Further, the front end of the first upper surface portion 21 a is located slightly behind the front ends of the left side surface portion 23 and the right side surface portion 24. Upper portions of the front end portions of the left side surface portion 23 and the right side surface portion 24 are obliquely cut out to form a cutout portion 20b. The front surface portion 25 includes a first front surface portion 25a and a second front surface portion 25b. The front end of the first upper surface portion 21a, the upper portion of the front end portions of the left side surface portion 23 and the right side surface portion 24, and the obliquely cut portions are connected by a first front surface portion 25a. And the lower end of the 1st front surface part 25a, the front end of the left side surface part 23, and the front end of the right side surface part 24 are connected by the 2nd front surface part 25b.

黒鍵２０の第１後面部２２ａ、第２後面部２２ｂ、左側面部２３、右側面部２４及び第２前面部２５ｂには、抜き勾配が設けられている。第１後面部２２ａ、第２後面部２２ｂ、及び第２前面部２５ｂの抜き勾配は、それぞれ０°〜１０°、望ましくは０°〜５°、さらに望ましくは０°〜３°に設定されている。左側面部２３及び右側面部２４の抜き勾配は、それぞれ０°〜８°、望ましくは０°〜３°、さらに望ましくは０°〜１°に設定されている。 The first rear surface portion 22a, the second rear surface portion 22b, the left side surface portion 23, the right side surface portion 24, and the second front surface portion 25b of the black key 20 are provided with draft angles. The draft angles of the first rear surface portion 22a, the second rear surface portion 22b, and the second front surface portion 25b are set to 0 ° to 10 °, preferably 0 ° to 5 °, and more preferably 0 ° to 3 °, respectively. Yes. The drafts of the left side surface portion 23 and the right side surface portion 24 are set to 0 ° to 8 °, desirably 0 ° to 3 °, and more desirably 0 ° to 1 °.

黒鍵２０の第１上面部２１ａ、第１後面部２２ａ、左側面部２３、右側面部２４、第１前面部２５ａ及び第２前面部２５ｂの表面には、白鍵１０と同様の線状の凸部として、第１上面凸部４１ａ、第１後面凸部４２ａ、左側面凸部４３、右側面凸部４４、第１前面凸部４５ａ及び第２前面凸部４５ｂがそれぞれ設けられている。そして、各部に設けられた線状凸部は、互いに隣接する面部に設けられた線状の凸部に繋がっている。また、各線状凸部の突出高さ及び間隔は、白鍵１０と同様に設定され、各部の算術平均粗さＲａも白鍵１０と同等となっている。なお、第２上面部２１ｂ及び第２後面部２２ｂは、演奏者に視覚的及び触覚的に認識されないので、模様が形成されず、平面状に形成されている。 On the surface of the first upper surface portion 21a, the first rear surface portion 22a, the left side surface portion 23, the right side surface portion 24, the first front surface portion 25a, and the second front surface portion 25b of the black key 20, the same linear protrusion as the white key 10 is formed. As a portion, a first upper surface convex portion 41a, a first rear surface convex portion 42a, a left side surface convex portion 43, a right side surface convex portion 44, a first front surface convex portion 45a, and a second front surface convex portion 45b are provided. And the linear convex part provided in each part is connected with the linear convex part provided in the mutually adjacent surface part. Further, the protruding height and interval of each linear convex portion are set in the same manner as the white key 10, and the arithmetic average roughness Ra of each portion is also equivalent to the white key 10. Note that the second upper surface portion 21b and the second rear surface portion 22b are not recognized visually and tactilely by the player, and thus are not formed with a pattern and are formed in a planar shape.

つぎに、白鍵１０を一体成型する射出成型機について説明する。なお、黒鍵２０を一体成型する射出成型機の構成は、白鍵１０の射出成型機と同様であるので、説明を省略する。白鍵１０を一体成形する射出成形機には、固定型と可動型からなる金型が備わっている。上記のように、白鍵１０は下方に開放された箱状に形成される。そのため、白鍵１０の上下方向が金型の型開閉方向となるように、固定型と可動型が設計されている。すなわち、固定型には、白鍵１０の表面側を成形するための凹部が設けられていて、可動型には、白鍵１０の内面側を成形するための凸部が設けられている。この固定型の凹部であって、白鍵１０の上面部１１、第１後面部１２ａ、第２後面部１２ｂ、第１左側面部１３ａ、第２左側面部１３ｂ、右側面部１４、第１前面部１５ａ及び第２前面部１５ｂの表面を成形するための成形面には、第１上面凸部３１ａ、第１後面凸部３２ａ、第２後面凸部３２ｂ、第１左側面凸部３３ａ、第２左側面凸部３３ｂ、右側面凸部３４、第１前面凸部３５ａ及び第２前面凸部３５ｂを形成するための線状の凹部がそれぞれ設けられている。 Next, an injection molding machine that integrally molds the white key 10 will be described. The configuration of the injection molding machine that integrally molds the black key 20 is the same as that of the white key 10 injection molding machine, and thus the description thereof is omitted. An injection molding machine that integrally molds the white key 10 includes a mold including a fixed mold and a movable mold. As described above, the white key 10 is formed in a box shape opened downward. Therefore, the fixed mold and the movable mold are designed so that the vertical direction of the white key 10 is the mold opening / closing direction of the mold. That is, the fixed mold is provided with a recess for molding the front side of the white key 10, and the movable mold is provided with a projection for molding the inner side of the white key 10. This is a fixed concave portion, and includes an upper surface portion 11, a first rear surface portion 12a, a second rear surface portion 12b, a first left side surface portion 13a, a second left side surface portion 13b, a right side surface portion 14, and a first front surface portion 15a of the white key 10. The molding surface for molding the surface of the second front surface portion 15b includes a first upper surface convex portion 31a, a first rear surface convex portion 32a, a second rear surface convex portion 32b, a first left side surface convex portion 33a, and a second left side. Linear concave portions for forming the surface convex portion 33b, the right side convex portion 34, the first front convex portion 35a, and the second front convex portion 35b are respectively provided.

上記のように構成した白鍵１０及び黒鍵２０においては、各面部の表面に線状の凸部を設け、隣り合う面部が交わる縁部でそれらの線状の凸部が繋がるようにしたので、視覚的及び触覚的に木製の鍵を模擬できる。 In the white key 10 and the black key 20 configured as described above, a linear convex portion is provided on the surface of each surface portion, and the linear convex portions are connected at an edge portion where adjacent surface portions intersect. Can simulate wooden keys visually and tactilely.

また、成形された白鍵１０を固定型から取り外す際には、第１後面部１２ａ、第２後面部１２ｂ、第３後面部１２ｃ、第１左側面部１３ａ、第２左側面部１３ｂ、右側面部１４及び前面部１５に取り出し方向とは反対方向の摩擦力が働く。黒鍵２０においても、第１後面部１２ａ、第２後面部２２ｂ、左側面部２３、右側面部２４、及び第２前面部２５ｂに取り出し方向とは反対方向の摩擦力が働く。しかし、上記のように、模様の認識し易さに応じて、算術平均粗Ｒａを設定した。すなわち、白鍵１０の第１後面部１２ａ、第２後面部１２ｂ及び前面部１５の算術平均粗さＲａは小さく、第１左側面部１３ａ、第２左側面部１３ｂ及び右側面部１４の算術平均粗さＲａは第１後面部１２ａ、第２後面部１２、第１前面部１５ａ及び第２前面部１５ｂの算術平均粗さＲａよりもさらに小さい。黒鍵２０においても、第１後面部２２ａ、第２前面部２５ａ及び第２前面部２５ｂの算術平均粗さＲａは小さく、左側面部２３及び右側面部２４の算術平均粗さＲａは第１後面部１２ａ、第２前面部２５ａ及び第２前面部２５ｂの算術平均粗さＲａよりもさらに小さい。したがって、白鍵１０及び黒鍵２０の外観を良好にするとともに、射出成型において成形された白鍵１０及び黒鍵２０の離型性を向上させることができる。また、算術平均粗さＲａを小さくした面部については、抜き勾配を小さくできる。すなわち、第１左側面部１３ａ、第２左側面部１３ｂ、右側面部１４、左側面部２３、右側面部２４、第１後面部１２ａ、第２後面部１２ｂ、第１後面部２２ａなどを上面部１１及び上面部２１に対して垂直に近い切り立った形状とすることができ、白鍵１０及び黒鍵２０の外観を良好にできる。また、白鍵１０の左側面部１３及び右側面部１４並びに黒鍵２０の左側面部２３及び右側面部２４の算術平均粗さＲａを小さくしたので、左側面部１３及び右側面部１４並びに左側面部２３及び右側面部２４の抜き勾配を小さくすることができ、白鍵１０及び黒鍵２０が適用された鍵盤装置において、鍵間の隙間を小さくすることができる。これにより、鍵盤装置の外観を良好にできる。 When the molded white key 10 is removed from the fixed mold, the first rear surface portion 12a, the second rear surface portion 12b, the third rear surface portion 12c, the first left side surface portion 13a, the second left side surface portion 13b, and the right side surface portion 14 are removed. In addition, a frictional force in the direction opposite to the take-out direction acts on the front surface portion 15. Also in the black key 20, a frictional force in a direction opposite to the take-out direction acts on the first rear surface portion 12a, the second rear surface portion 22b, the left side surface portion 23, the right side surface portion 24, and the second front surface portion 25b. However, as described above, the arithmetic average roughness Ra was set according to the ease of pattern recognition. That is, the arithmetic average roughness Ra of the first rear surface portion 12a, the second rear surface portion 12b, and the front surface portion 15 of the white key 10 is small, and the arithmetic average roughness of the first left side surface portion 13a, the second left side surface portion 13b, and the right side surface portion 14. Ra is further smaller than the arithmetic average roughness Ra of the first rear surface portion 12a, the second rear surface portion 12, the first front surface portion 15a, and the second front surface portion 15b. Also in the black key 20, the arithmetic average roughness Ra of the first rear surface portion 22a, the second front surface portion 25a, and the second front surface portion 25b is small, and the arithmetic average roughness Ra of the left side surface portion 23 and the right side surface portion 24 is the first rear surface portion. 12a, the arithmetic mean roughness Ra of the 2nd front part 25a and the 2nd front part 25b is still smaller. Therefore, the appearance of the white key 10 and the black key 20 can be improved, and the releasability of the white key 10 and the black key 20 formed by injection molding can be improved. Further, the draft angle can be reduced for the surface portion having the reduced arithmetic average roughness Ra. That is, the first left side surface portion 13a, the second left side surface portion 13b, the right side surface portion 14, the left side surface portion 23, the right side surface portion 24, the first rear surface portion 12a, the second rear surface portion 12b, the first rear surface portion 22a, etc. It is possible to make the shape nearly vertical with respect to the portion 21 and to improve the appearance of the white key 10 and the black key 20. In addition, since the arithmetic average roughness Ra of the left side surface portion 13 and the right side surface portion 14 of the white key 10 and the left side surface portion 23 and the right side surface portion 24 of the black key 20 is reduced, the left side surface portion 13 and the right side surface portion 14, and the left side surface portion 23 and the right side surface portion. The draft angle of 24 can be reduced, and the gap between the keys can be reduced in the keyboard device to which the white key 10 and the black key 20 are applied. Thereby, the external appearance of a keyboard apparatus can be made favorable.

さらに、本発明の実施にあたっては、上記実施形態に限定されるものではなく、本発明の目的を逸脱しない限りにおいて種々の変更が可能である。 Furthermore, in carrying out the present invention, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention.

上記実施形態においては、白鍵１０及び黒鍵２０の表面に形成される模様は、木目調とした。しかし、この模様は木目調に限られず、幾何学模様、文字など、どんな模様であってもよい。例えば、図３Ａ及び図３Ｂに示すように、白鍵において、上面及び前面にそれぞれ薄い板状の部材（例えば、板状に加工した象牙）を貼った白鍵を模擬した白鍵１０Ａとしてもよい。この白鍵１０Ａの外形は白鍵１０と同様であるので、白鍵１０と同じ符号を付して、外形の構成についての説明を省略する。第１上面部１１ａには、複数の線状の第１上面凸部６１ａが設けられている。これにより、白鍵の上面用の板状部材の表面に表れる模様を模擬している。また、第１後面部１２ａ、第２後面部１２ｂの上端部、第１左側面部１３ａの上端部、第２左側面部１３ｂの上端部であって第１後面部１２ａと第２後面部１２ｂの間の部分、右側面部１４の上端部であって第１前面部１５ａと第１後面部１２ａの間の部分、及び第１前面部１５ａにも、線状の複数の第１後面凸部６２ａ、第２後面凸部６２ｂ、第１左側面凸部６３ａ１、第２左側面凸部６３ｂ、右側面凸部６４ａ１、及び第１前面凸部６５ａがそれぞれ設けられている。これにより、第１上面部１１ａの外周に沿う領域であって、上下方向の幅が突出部１０ｃの上下方向の幅と同じ幅の領域に模様が形成される。すなわち、白鍵の上面用の板状部材の端面に表れる模様を模擬している。 In the above embodiment, the pattern formed on the surface of the white key 10 and the black key 20 is made of wood grain. However, this pattern is not limited to wood grain, and any pattern such as a geometric pattern or letters may be used. For example, as shown in FIGS. 3A and 3B, a white key 10A simulating a white key in which a thin plate-like member (for example, ivory processed into a plate shape) is pasted on the upper surface and the front surface of the white key may be used. . Since the outer shape of the white key 10A is the same as that of the white key 10, the same reference numerals as those of the white key 10 are used, and description of the configuration of the outer shape is omitted. The first upper surface portion 11a is provided with a plurality of linear first upper surface convex portions 61a. This simulates the pattern appearing on the surface of the plate member for the upper surface of the white key. Further, the upper end of the first rear surface portion 12a, the second rear surface portion 12b, the upper end portion of the first left side surface portion 13a, and the upper end portion of the second left side surface portion 13b between the first rear surface portion 12a and the second rear surface portion 12b. Part, the upper end part of the right side surface part 14 between the first front surface part 15a and the first rear surface part 12a, and the first front surface part 15a, a plurality of linear first rear surface convex parts 62a, (2) A rear surface convex portion 62b, a first left side convex portion 63a1, a second left side convex portion 63b, a right side convex portion 64a1, and a first front convex portion 65a are provided. As a result, a pattern is formed in a region along the outer periphery of the first upper surface portion 11a and having a vertical width equal to the vertical width of the protruding portion 10c. That is, the pattern appearing on the end face of the plate-like member for the upper surface of the white key is simulated.

また、第２前面部１５ｂにも、複数の線状の第２前面凸部６５ｂが設けられている。これにより、白鍵の前面用の板状部材の表面に表れる模様を模擬している。さらに、第１左側面部１３ａ及び右側面部１４の前端部の下部（すなわち、前方に突出していない部分）において上下方向に延びる領域であって、前後方向の幅が突出部１０ｃの上下方向の幅と同じ幅である領域にも、左側面凸部６３ａ２及び右側面凸部６４ａ２が設けられている。これにより、白鍵の前面用の板状部材の端面に表れる模様を模擬している。他の部分には、白鍵１０と同様に木目調の模様が設けられている。互いに隣り合う面部に設けられていて、白鍵の上面用の板状部材の模様を模擬するための線状の凸部同士は、その隣り合う面部の縁部にて繋がっている。また、互いに隣り合う面部に設けられていて、白鍵の前面用の板状部材の模様を模擬するための線状の凸部同士は、その隣り合う面部の縁部にて繋がっている。また、白鍵の上面用の板状部材の模様を模擬するための線状の凸部、白鍵の前面用の板状部材の模様を模擬するための線状の凸部及び木目調の模様を形成する線状の凸部は互いに繋がらないようにしている。なお、この白鍵１０Ａの板状部材を模擬した模様及び木目模様は、射出成型により一体的に設けられる。 The second front surface portion 15b is also provided with a plurality of linear second front surface convex portions 65b. Thereby, the pattern which appears on the surface of the plate-like member for the front surface of the white key is simulated. Furthermore, it is a region extending in the vertical direction in the lower part of the front end portion of the first left side surface part 13a and the right side surface part 14 (that is, the part that does not protrude forward), and the width in the front-rear direction is the same as the vertical width of the protrusion 10c. A left side convex portion 63a2 and a right side convex portion 64a2 are also provided in a region having the same width. This simulates the pattern that appears on the end face of the front plate member of the white key. Similar to the white key 10, the other part is provided with a woodgrain pattern. The linear convex portions provided on the adjacent surface portions and simulating the pattern of the plate member for the upper surface of the white key are connected to each other at the edge portions of the adjacent surface portions. Moreover, the linear convex part which is provided in the mutually adjacent surface part and simulates the pattern of the plate-shaped member for the front surface of a white key is connected in the edge part of the adjacent surface part. Also, a linear protrusion for simulating the pattern of the plate member for the top surface of the white key, a linear protrusion for simulating the pattern of the plate member for the front surface of the white key, and a woodgrain pattern The line-shaped convex portions forming are not connected to each other. Note that the pattern and the grain pattern simulating the plate-like member of the white key 10A are integrally provided by injection molding.

第１上面凸部６１ａ、第１後面凸部６２ａ及び第２後面凸部６２ｂの突出高さ及び間隔が調整されて、第１上面部１１ａ、第１前面部１５ａ、第２前面部１５ｂ、第１後面部１２ａ及び第２後面部１２ｂの算術平均粗さＲａが上記の白鍵１０と同等に設定されている。また、第１前面凸部６５ａ、第２前面凸部６５ｂの突出高さ及び間隔が調整されて、第１前面部１５ａの算術平均粗さＲａが０．０５μｍ〜６．０μｍ、望ましくは０．０５μｍ〜３．０μｍに設定されている。第２前面部１５ｂの算術平均粗さＲａは、第１前面部１５ａの算術平均粗さＲａよりもやや小さく、０．０４μｍ〜６．０μｍ、望ましくは０．０４μｍ〜３．０μｍに設定されている。また、第１左側面凸部６３ａ１、第１左側面凸部６３ａ２、第２左側面凸部６３ｂ、右側面凸部６４ａ１及び右側面凸部６４ａ２の突出高さ及び間隔が調整されて、第１左側面部１３ａ、第２左側面部１３ｂ及び右側面部１４の上端部（すなわち、第１左側面凸部６３ａ１、第２左側面凸部６３ｂ及び右側面凸部６４ａ１が形成された部分）の算術平均粗さＲａが、０．０５μｍ〜６．０μｍ、望ましくは０．０５μｍ〜３．０μｍに設定されている。これにより、第１左側面部１３ａ、第２左側面部１３ｂ及び右側面部１４の下部（すなわち、第１左側面凸部３３ａ、第１左側面凸部６３ａ２、第２左側面凸部３３ｂ、右側面凸部３４及び右側面凸部６４ａ２が形成された部分）の算術平均粗さＲａが、第１左側面部１３ａ、第２左側面部１３ｂ及び右側面部１４の上端部よりもやや小さく設定されている。 The protrusion heights and intervals of the first upper surface convex portion 61a, the first rear surface convex portion 62a, and the second rear surface convex portion 62b are adjusted, so that the first upper surface portion 11a, the first front surface portion 15a, the second front surface portion 15b, The arithmetic average roughness Ra of the first rear surface portion 12a and the second rear surface portion 12b is set to be equal to the white key 10 described above. In addition, the protrusion height and interval of the first front surface convex portion 65a and the second front surface convex portion 65b are adjusted, so that the arithmetic average roughness Ra of the first front surface portion 15a is 0.05 μm to 6.0 μm, preferably 0. It is set to 05 μm to 3.0 μm. The arithmetic average roughness Ra of the second front surface portion 15b is slightly smaller than the arithmetic average roughness Ra of the first front surface portion 15a, and is set to 0.04 μm to 6.0 μm, preferably 0.04 μm to 3.0 μm. Yes. In addition, the protrusion heights and intervals of the first left side convex part 63a1, the first left side convex part 63a2, the second left side convex part 63b, the right side convex part 64a1, and the right side convex part 64a2 are adjusted, and the first Arithmetic mean roughness of the left side surface portion 13a, the second left side surface portion 13b, and the upper end portions of the right side surface portion 14 (that is, the portion where the first left side surface convex portion 63a1, the second left side surface convex portion 63b, and the right side surface convex portion 64a1 are formed). The thickness Ra is set to 0.05 μm to 6.0 μm, preferably 0.05 μm to 3.0 μm. Accordingly, the lower portions of the first left side surface portion 13a, the second left side surface portion 13b, and the right side surface portion 14 (that is, the first left side surface convex portion 33a, the first left side surface convex portion 63a2, the second left side surface convex portion 33b, the right side surface convex portion. The arithmetic average roughness Ra of the portion 34 and the portion on which the right side convex portion 64a2 is formed is set slightly smaller than the upper ends of the first left side portion 13a, the second left side portion 13b, and the right side portion 14.

なお、各面部の抜き勾配を、白鍵１０と同等に設定してもよいが、下部の表面粗さを上端部の表面粗さよりも小さくした左側面部１３、右側面部１４及び前面部１５においては、下部の抜き勾配を上端部の抜き勾配よりも小さくしてもよい。すなわち、第１前面部１５ａの抜き勾配を０°〜４５°、望ましくは０°〜５°、さらに望ましくは０°〜３°に設定してもよい。また、第２前面部１５ｂの抜き勾配を、第１前面部１５ａよりもやや小さく、０°〜４５°、望ましくは０°〜４°、さらに望ましくは０°〜２°に設定してもよい。また、第１左側面部１３ａ、第２左側面部１３ｂ及び右側面部１４の上端部の抜き勾配を０°〜１０°、望ましくは０°〜５°、さらに望ましくは０°〜３°に設定してもよい。また、第１左側面部１３ａ、第２左側面部１３ｂ及び右側面部１４の下部の抜き勾配を上端部の抜き勾配よりも小さく、０°〜８°、望ましくは０°〜３°、さらに望ましくは０°〜１°に設定してもよい。 The draft angle of each surface portion may be set to be equivalent to the white key 10, but in the left side surface portion 13, the right side surface portion 14 and the front surface portion 15 in which the lower surface roughness is smaller than the upper surface roughness. The draft at the bottom may be smaller than the draft at the upper end. That is, the draft angle of the first front surface portion 15a may be set to 0 ° to 45 °, desirably 0 ° to 5 °, and more desirably 0 ° to 3 °. Further, the draft angle of the second front surface portion 15b may be set to 0 ° to 45 °, preferably 0 ° to 4 °, more preferably 0 ° to 2 °, slightly smaller than the first front surface portion 15a. . Further, the draft angle of the upper end portions of the first left side surface portion 13a, the second left side surface portion 13b and the right side surface portion 14 is set to 0 ° to 10 °, preferably 0 ° to 5 °, and more preferably 0 ° to 3 °. Also good. In addition, the draft of the lower portions of the first left side 13a, the second left side 13b and the right side 14 is smaller than the draft of the upper end, and is 0 ° to 8 °, preferably 0 ° to 3 °, and more preferably 0. You may set to 0-1 degree.

上記のように構成した白鍵１０Ａによれば、複数の部材で構成された白鍵を模擬することができる。また、左側面部１３及び右側面部１４の模様は。鍵盤装置において、隣の白鍵が押鍵されたときにのみ演奏者によって認識される。そのため、左側面部１３及び右側面部１４の上部の模様は、左側面部１３及び右側面部１４の下部の模様に比べてより目立つ。そこで、上部の模様を鮮明にし、下部の模様を上部の模様よりも曖昧にした。また、第１前面部１５ａの模様は、押鍵時及び非押鍵時のいずれの状態においても認識されるが、第２前面部１５ｂの下部の模様は、押鍵時に鍵盤装置の内部に入り込んで、演奏者に認識されなくなる。そこで、第１前面部１５ａの模様を鮮明にし、第２前面部１５ｂの模様を第１前面部１５ａに比べて曖昧にした。射出成型における白鍵１０Ａの離型性は、白鍵１０の離型性に比べると若干低下するが、左側面部１３、右側面部１４及び前面部１５のうち、大部分の面積を占める下部の表面粗さを上部の表面粗さに比べて小さくしたので、射出成形における離型性の低下を最小限に留めることができる。 According to the white key 10A configured as described above, it is possible to simulate a white key composed of a plurality of members. Moreover, the pattern of the left side surface part 13 and the right side surface part 14 is. In the keyboard device, the player recognizes it only when the adjacent white key is pressed. Therefore, the pattern of the upper part of the left side part 13 and the right side part 14 is more conspicuous than the pattern of the lower part of the left side part 13 and the right side part 14. Therefore, the upper pattern was made clearer and the lower pattern was made more ambiguous than the upper pattern. Further, the pattern on the first front surface portion 15a is recognized both when the key is depressed and when the key is not depressed, but the pattern on the lower portion of the second front surface portion 15b enters the inside of the keyboard device when the key is depressed. Then, it is not recognized by the performer. Therefore, the pattern of the first front surface portion 15a was made clear, and the pattern of the second front surface portion 15b was made ambiguous compared to the first front surface portion 15a. The releasability of the white key 10A in the injection molding is slightly lower than the releasability of the white key 10, but the lower surface occupying most of the left side surface portion 13, the right side surface portion 14, and the front surface portion 15. Since the roughness is reduced as compared with the surface roughness of the upper part, it is possible to minimize a decrease in mold release in injection molding.

また、上記実施形態の黒鍵２０において、左側面部２３及び右側面部２４の下部（すなわち、第２前面部２５ｂと第２後面部２２ｂの間の部分）の抜き勾配を、左側面部２３及び右側面部２４の上部（すなわち、左側面部２３及び右側面部２４の上部であって第１前面部２５ａと第１後面部２２ａの間の部分であって、鍵盤装置に組み付けられたときに白鍵の上面より上方に突出する部分）の抜き勾配よりも小さくしてもよい。さらに、左側面凸部４３及び右側面凸部４４の突出高さ及び間隔を左側面部２３及び右側面部２４の上部と下部とで異なるように調整して、左側面部２３及び右側面部２４の下部の算術平均粗さＲａが、左側面部２３及び右側面部２４の上部の算術平均粗さＲａよりもやや小さくなるようにしてもよい。また、第２前面部２５ｂの模様は、鍵盤装置において、隣り合う鍵が押鍵されたときにのみ認識される。そこで、第１前面凸部４５ａ及び第２前面凸部４５ｂの突出高さ及び間隔を調整して、第２前面部２５ｂの算術表面粗さＲａが、第１前面部２５ａの算術平均粗さＲａよりも小さくなるように設定してもよい。これによれば、黒鍵２０の離型性をさらに向上させることができる。 Further, in the black key 20 of the above embodiment, the draft of the lower part of the left side part 23 and the right side part 24 (that is, the part between the second front part 25b and the second rear part 22b) is set to the left side part 23 and the right side part. 24 (ie, the upper part of the left side part 23 and the right side part 24, and the part between the first front part 25a and the first rear part 22a, and the upper part of the white key when assembled to the keyboard device). You may make it smaller than the draft of the part which protrudes upwards. Further, the protrusion height and interval of the left side surface convex portion 43 and the right side surface convex portion 44 are adjusted to be different between the upper portion and the lower portion of the left side surface portion 23 and the right side surface portion 24, and the lower portions of the left side surface portion 23 and the right side surface portion 24 are adjusted. The arithmetic average roughness Ra may be slightly smaller than the arithmetic average roughness Ra above the left side surface portion 23 and the right side surface portion 24. Further, the pattern of the second front surface portion 25b is recognized only when an adjacent key is pressed in the keyboard device. Therefore, by adjusting the protrusion height and interval of the first front surface convex portion 45a and the second front surface convex portion 45b, the arithmetic surface roughness Ra of the second front surface portion 25b becomes the arithmetic average roughness Ra of the first front surface portion 25a. You may set so that it may become smaller. According to this, the releasability of the black key 20 can be further improved.

また、上記実施形態及びその変形例においては、各面部に線状の凸部を設けて、模様を形成するようにした。しかし、各面部に突起状の凸部、線状の凹部、段差などを設けることにより、模様を形成してもよい。また、各面部の交わる縁部にて、模様を構成する線部が繋がっていなくてもよい。なお、各面部において、凹凸によって２種類以上の模様を設けた場合、その模様の境界線として認識される線部も凹凸による模様に含まれる。 Moreover, in the said embodiment and its modification, a linear convex part was provided in each surface part, and the pattern was formed. However, a pattern may be formed by providing a protruding convex portion, a linear concave portion, a step, or the like on each surface portion. Moreover, the line part which comprises a pattern does not need to be connected in the edge part which each surface part crosses. In addition, when two or more types of patterns are provided on each surface by unevenness, the line portion recognized as the boundary line of the pattern is also included in the unevenness pattern.

また、上記実施形態及びその変形例においては、各面部に設けられた線状の凸部の突出高さ及び間隔を調整して、各面部の算術平均粗さＲａがそれぞれ所定の範囲になるようにした。しかし、各面部に設けられた線状の凸部の突出高さ及び間隔を調整して、各面部の最大高さＲｙ、十点平均粗さＲｚなどがそれぞれ所定の範囲になるようにしてもよい。 Moreover, in the said embodiment and its modification, the projection height and space | interval of the linear convex part provided in each surface part are adjusted, and arithmetic mean roughness Ra of each surface part becomes a predetermined range, respectively. I made it. However, the maximum height Ry, the ten-point average roughness Rz, etc. of each surface portion may be within a predetermined range by adjusting the protruding height and interval of the linear protrusions provided on each surface portion. Good.

また、上記実施形態及びその変形例の白鍵１０，１０Ａの後端部には、段部１０ａが設けられているが、この段部１０ａを設けずに、白鍵１０，１０Ａの上面は、前端から後端にかけて連続した平面状に形成されていてもよい。また、白鍵１０，１０Ａの前端部には、突出部１０ｃが設けられているが、この突出部１０ｃを設けなくてもよい。 In addition, a step portion 10a is provided at the rear end portion of the white keys 10 and 10A of the above-described embodiment and modifications thereof, but without providing the step portion 10a, the upper surface of the white keys 10 and 10A is It may be formed in a continuous flat shape from the front end to the rear end. Moreover, although the protrusion part 10c is provided in the front-end part of the white keys 10 and 10A, this protrusion part 10c does not need to be provided.

１０，１０Ａ…白鍵、１１ａ・・・第１上面部、１２ａ・・・第１後面部、１２ｂ・・・第２後面部、１３ａ・・・第１左側面部、１３ｂ・・・第２左側面部、１４…右側面部、１５ａ・・・第１前面部、１５ｂ・・・第２前面部、２０・・・黒鍵、２１ａ・・・第１上面部、２２ａ・・・第１後面部、２３・・・第１左側面部、２４・・・右側面部、２５ａ・・・第１前面部、２５ｂ・・・第２前面部、 DESCRIPTION OF SYMBOLS 10, 10A ... White key, 11a ... 1st upper surface part, 12a ... 1st rear surface part, 12b ... 2nd rear surface part, 13a ... 1st left side surface part, 13b ... 2nd left side Surface part, 14 ... right side part, 15a ... first front part, 15b ... second front part, 20 ... black key, 21a ... first upper surface part, 22a ... first rear surface part, 23 ... 1st left side surface part, 24 ... Right side surface part, 25a ... 1st front surface part, 25b ... 2nd front surface part,

Claims

上面、側面、前面及び後面のうちの少なくとも前記上面及び前記側面に凹凸からなる装飾模様が形成された電子楽器の鍵において、
前記鍵が射出成形により成形され、前記鍵を前記鍵の上下方向に移動させることにより成形型から離型するものであり、かつ、前記側面の表面粗さが、前記上面の表面粗さよりも小さく設定されていることを特徴とする電子楽器の鍵。 In the key of the electronic musical instrument in which a decorative pattern composed of irregularities is formed on at least the upper surface and the side surface of the upper surface, the side surface, the front surface, and the rear surface,
The key is molded by injection molding, and is released from the mold by moving the key in the vertical direction of the key, and the surface roughness of the side surface is smaller than the surface roughness of the upper surface. Electronic musical instrument key characterized by being set.

上面、側面、前面及び後面のうちの少なくとも前記上面及び前記前面に凹凸からなる装飾模様が形成された電子楽器の鍵において、
前記鍵が射出成形により成形され、前記鍵を前記鍵の上下方向に移動させることにより成形型から離型するものであり、かつ、前記前面の表面粗さが、前記上面の表面粗さよりも小さく設定されていることを特徴とする電子楽器の鍵。 In a key of an electronic musical instrument in which a decorative pattern made of irregularities is formed on at least the upper surface and the front surface of the upper surface, side surface, front surface and rear surface,
The key is molded by injection molding, and is released from the mold by moving the key in the vertical direction of the key, and the surface roughness of the front surface is smaller than the surface roughness of the upper surface. Electronic musical instrument key characterized by being set.

上面、側面、前面及び後面のうちの少なくとも前記側面及び前記前面に凹凸からなる装飾模様が形成された電子楽器の鍵において、
前記鍵が射出成形により成形され、前記鍵を前記鍵の上下方向に移動させることにより成形型から離型するものであり、かつ、前記側面の表面粗さが、前記前面の表面粗さよりも小さく設定されていることを特徴とする電子楽器の鍵。 In the key of the electronic musical instrument in which a decorative pattern composed of irregularities is formed on at least the side surface and the front surface of the upper surface, the side surface, the front surface, and the rear surface,
The key is molded by injection molding, and is released from the mold by moving the key in the vertical direction of the key, and the surface roughness of the side surface is smaller than the surface roughness of the front surface. Electronic musical instrument key characterized by being set.

上面、側面、前面及び後面のうちの少なくとも前記上面及び前記後面に凹凸からなる装飾模様が形成された電子楽器の鍵において、
前記鍵が射出成形により成形され、前記鍵を前記鍵の上下方向に移動させることにより成形型から離型するものであり、かつ、前記後面の表面粗さが、前記上面の表面粗さよりも小さく設定されていることを特徴とする電子楽器の鍵。 In the key of the electronic musical instrument in which a decorative pattern made of irregularities is formed on at least the upper surface and the rear surface of the upper surface, the side surface, the front surface, and the rear surface,
The key is molded by injection molding, and is released from the mold by moving the key in the vertical direction of the key, and the surface roughness of the rear surface is smaller than the surface roughness of the upper surface. Electronic musical instrument key characterized by being set.

上面、側面、前面及び後面のうちの少なくとも前記側面又は前記前面に凹凸からなる装飾模様が形成された電子楽器の鍵において、
前記鍵が射出成形により成形され、前記鍵を前記鍵の上下方向に移動させることにより成形型から離型するものであり、かつ、前記側面及び前記前面のうちの一方又は両方が下部側部分と上部側部分とで構成され、前記下部側部分の表面粗さが前記上部側部分の表面粗さよりも小さく設定されていることを特徴とする電子楽器の鍵。 In the key of the electronic musical instrument in which a decorative pattern composed of irregularities is formed on at least the side surface or the front surface of the upper surface, the side surface, the front surface, and the rear surface,
The key is molded by injection molding, and is released from the mold by moving the key in the vertical direction of the key, and one or both of the side surface and the front surface is a lower side portion. An electronic musical instrument key comprising: an upper side portion, wherein a surface roughness of the lower side portion is set smaller than a surface roughness of the upper side portion.