JP2003114671A - Keyboard for musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for such processing that another member such as keyboard lead is buried to weight a keyboard plate of a keyboard for a musical instrument and to weight the keyboard plate while maintaining the strength without forming any brittle part by coupling a heterogeneous material. SOLUTION: The keyboard for the musical instrument has the main body of the keyboard plate constituted by stacking a plurality of plate materials, and the keyboard plate 1 is constituted by using as a center core a weighting material 1b having higher specific gravity than the plate materials 1a, etc., forming the main body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard of a keyboard instrument such as a grand piano or an upright piano, and more particularly to an improvement of a laminated keyboard.

[0002]

2. Description of the Related Art Generally, a keyboard plate, which is a main part of a white key and a black key of a piano keyboard, is formed by laminating plate materials 100a.
00 is configured. And in this white key and black key,
In order to maintain the weight balance between the front and rear and to maintain a constant feeling when pressing a key in a high-pitched to low-pitched tone, a through hole 101 is formed at the rear or front of the keyboard to form a cylindrical lead W. I am trying to bury it.

On the other hand, in the case of not embedding the lead of the keyboard, as shown in FIG. 5, plate members 100a, ..., 100b .. The keyboard board 100 is configured by combining the above.

[0004]

As described above, in order to keep the balance of the weight of the keyboard board, in the case of embedding the keyboard lead, a through hole is formed in each keyboard board to crimp and / or bond the keyboard lead. Since the work of fixing with a chemical is required, the work process is indispensable, the number of parts is increased, and the manufacturing cost cannot be reduced. Further, since the weight added to each keyboard plate varies, it is necessary to perform a complicated work such as fixing a plurality of keyboard leads or forming through holes corresponding to various keyboard lead outlines. It was.

Further, in the case of finger jointing different kinds of materials, it is necessary to fix the joints with an adhesive to connect them, which requires a complicated work process. Moreover, the finger-jointed portion has a lower strength than the other portions, and there is a risk that stress is concentrated on this portion at the time of key pressing and string striking, resulting in damage.
Further, due to the difference in mass between the different materials, warpage or twisting of the entire keyboard is likely to occur, resulting in lack of stability.

The present invention has been made in view of the above problems of the conventional structure, and does not require a process for embedding another member such as keyboard lead for the purpose of weighting the keyboard plate.
This is to connect different kinds of materials so that a fragile portion is not formed, and a weight can be applied to the keyboard plate while maintaining the strength.

[0007]

DISCLOSURE OF THE INVENTION The present invention is a musical instrument keyboard in which a plurality of plate members are laminated to form a main body of a keyboard plate, and a weighting material having a high specific gravity with respect to the main plate member is used. The structure of the first keyboard plate that is a core,

In the above-mentioned first structure, a structure of a second keyboard plate in which a weighting material is used as a center core on the key pressing side,

In the above first structure, a structure of a third keyboard plate in which a weighting material is used as a center core on the string-striking side,

In the above-mentioned first to third constructions, the above-mentioned problem is solved by the construction of the fourth keyboard board in which the weighting material is relatively increased / decreased between the low-pitched keyboard and the high-pitched keyboard. Solve.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The embodiments of the present invention shown in the drawings will be described in detail below. The embodiment shown in the drawings will be described based on the keyboard structure of an upright piano and a grand piano, but it can also be applied to an electronic keyboard instrument such as an electronic piano.

FIG. 1 shows the structure of an upright piano in which the present invention is implemented, and FIG. 2 shows the structure of a grand piano. In the figure, reference numeral 1 denotes a keyboard plate, the middle of which in the depth direction is guided and supported by a reed inside 2 and a balance key pin 3 standing upright in the reed. The end of the keyboard plate 1 on the string striking side is supported by the back rail 4, and the end of the key pressing side is guided by the reed front vegetation 5 and the front key pin 6 erected on the reed front vegetation. It is supported.

Next, the keyboard plate 1 is mainly constituted by laminating highly flexible plate materials 1a, etc. such as spruce (specific gravity of about 0.42 g / cm ³ ) and hand salt pine,
In the keyboard of the upright piano shown in FIG. 1, a plate material 1a constituting the main body on the string striking side is a core material, and a weight material 1b having a higher specific gravity is used as a core and is laminated and integrated. As a result, this keyboard plate is weighted to the string striking side, and the effect of depressing the key can be obtained. On the contrary, when the weighting material 1b is used as the center of the keyboard plate 1 on the key pressing side, the feeling of key pressing can be lightened and made lighter.

The weighted material is a wood material such as Meranti, Kapole, etc., and has a specific gravity of 0.8 to 0.9 g.
A material having a specific gravity of about 1 / cm ³ may be appropriately selected, or wood chips may be mixed with iron pieces and iron powder in a synthetic resin solution and solidified to obtain an arbitrary specific gravity. Further, polycarbonate (specific gravity of about 1.20 g / cm ^3), polyphenylene sulfide (specific gravity of about 1.66 g / cm ^3), a mixture of glass fibers in a synthetic resin material such as polyamide (specific gravity of about 1.14 g / cm ³⁾ You may make it a core as a weighting material. Further, a pulp-based material (MDF) made of wood as a raw material may be mixed with metal powder or tungsten powder and solidified to form a core as a weighting material.

FIG. 3 shows a state in which the weighting material 1b is used as a center core on the key-depressing side of the keyboard plate 1 of a grand piano. It is possible to obtain the effect of lightening. On the contrary,
When the weighted material 1b is used as the center of the keyboard 1 on the string striking side,
The feeling of pressing the keys can be increased.

By implementing the present invention, the rationality of keyboard production can be improved. That is, the keyboard plate is usually formed by laminating a plurality of keyboard plate materials 1a, ... Corresponding to the total area of the keyboard having the shape shown in FIG. There is. Therefore, for example, the weighting material 1b formed in a plate shape in advance and the weighting material 1c for giving more weight to the low-pitched keyboard plate are arranged and laminated as shown in FIG. It is possible to collectively obtain the keyboard plates to which desired weights are individually applied.

In this case, by interposing the weighted material so as to gradually decrease from the low-pitched side to the high-temperature side, an appropriate weight can be given to each keyboard plate, and the desired desired value can be obtained from the low-pitched side to the high-temperature side. You can get the feeling of pressing the key.

[0018]

As described above in detail, according to the present invention, the plate material, which is the main component of the keyboard, and the weighting material are laminated simultaneously to form an integrated structure, so that the strength is not impaired.
Further, since post-processing such as burying keyboard lead as in the past is not necessary at all, the rationality of production can be improved. Further, since the kind of the weighting material can be arbitrarily determined, a desired weight can be accurately applied to each of the keyboard plates, and an extremely high quality keyboard musical instrument with improved key pressing feeling is provided. Is something that can be done.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state where the present invention is applied to a keyboard plate of an upright piano.

FIG. 2 is a perspective view showing a state in which the present invention is applied to a keyboard plate of a grand piano.

FIG. 3 is a diagram illustrating an example of manufacturing the keyboard plate of the present invention.

FIG. 4 is a perspective view showing a conventional example in which keyboard lead is embedded in a keyboard plate to perform weighting.

FIG. 5 is a perspective view showing a conventional example in which different kinds of materials are connected to form a keyboard plate.

[Explanation of symbols]

1 ... keyboard 1a: Plate material 1b ・ ・ ・ ・ ・ Weighted material 1c: Weighted material 2 ... 3 ... Balance key pin 4 ... Back rail 5 ... Reed front 6 ... Front key pin

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Claims (4)

[Claims] 1. A keyboard for a musical instrument, wherein a plurality of plate members are laminated to form a main body of a keyboard plate, wherein the weight plate material having a high specific gravity with respect to the main plate member is used as the core plate. Keyboard for musical instruments characterized by. 2. The keyboard for a musical instrument according to claim 1, wherein the keyboard plate is formed by using a weighting material as a center core on the key-pressing side. 3. A keyboard for a musical instrument according to claim 1, wherein the keyboard plate is formed by using a weighted material as a core on the string-striking side. 4. The keyboard for musical instruments according to claim 1, wherein the weighting material is increased / decreased relative to a low-pitched keyboard and a high-pitched keyboard to form a core.