JPH066396Y2 - Keyboard device for electronic musical instruments - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a keyboard device for an electronic musical instrument, and particularly to a keyboard device having a touch similar to a piano.

2. Description of the Related Art In recent years, in the electronic musical instrument industry, it has become possible to electronically synthesize a sound source of attenuating system such as a piano, and as electronic pianos utilizing the technology have become popular, they are compact and have a simple structure and are similar to pianos. Efforts have been made to obtain a touch, but it was difficult to obtain a touch close to that of a piano due to the key length limitation.

The above-described conventional keyboard device will be described below with reference to the drawings.

FIG. 4 shows an example in which a resin key is used to increase the inertia by adding a weight and a friction member is provided near the fulcrum.

Resin white key 1 or black key 1 (hereinafter simply referred to as key 1)
Is formed so as to have a substantially columnar sliding surface at the rear end thereof, and the friction member 3 having the opposite sliding surface is fitted into the substantially cylindrical sliding surface and is fixed to the chassis 5 to provide friction. The spring 4 is configured so as to be vertically swingable while using the center O ₂ of the radius of curvature of the member 3 as a fulcrum.
Was urged upward by. On the other hand, a weight 2 is fixed near the tip of the key 1 so that a predetermined operating force is obtained at the tip of the key 1 and an inertial force is increased when the key 1 is operated to obtain a touch close to a piano. It was With such a structure, a touch that can withstand the piano playing method to some extent was obtained, but it had the following problems.

Problems to be Solved by the Invention In the keyboard device having the above-described structure, it is usual that the distance from the tip of the key 1 to the fulcrum O _{2 of the} key 1 is shorter than that of the piano due to space limitations. . Therefore, as shown in FIG. 3, there is a problem that Ken 1 comes out to the front as the key 1 is pressed down particularly during the performance near the rear part of the black key.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a keyboard device for an electronic musical instrument, which has a compact structure as in the prior art and realizes a depressed state of a key when playing, such as a piano.

Means for Solving the Problems In order to solve the above problems, the keyboard for an electronic musical instrument of the present invention has a substantially cylindrical sliding surface formed at the rear end of the key. A fulcrum is formed in combination with a friction member to be inserted, and the center point of the radius of curvature of the substantially cylindrical surface is formed so as to match the distance from the key tip of the piano to the fulcrum.

The present invention has the above-described structure, but the fulcrum of the rocking motion of the key is at the same position as the piano in spite of its compact structure. Is possible.

Embodiment A keyboard device for an electronic musical instrument according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the structure of a keyboard device for an electronic musical instrument according to an embodiment of the present invention. In FIG. 1, a plurality of keys 1 are arranged on the chassis 5 for each pitch of the sound such that the friction members 3 serve as fulcrums. It is biased upward.
A substantially cylindrical sliding surface is integrally formed at the rear end of the key 1. On the other hand, the friction member 3 is fitted and inserted into the sliding surface of the rear end portion of the key 1 which is a substantially cylindrical surface. The radius of curvature R1 of the cylindrical sliding surface is measured from the tip of the key 1 to the fulcrum O ₁
Is set to be the same as the length A from the tip of the key 1 to the fulcrum O _{1 in} the piano shown in FIG. The operation of the electronic musical instrument keyboard apparatus configured as described above will be described below with reference to FIG. FIG. 3 shows the operation of the key in the conventional example and the embodiment of the present invention. In the conventional example, when the key 1 is pressed during key performance, the point A of the key 1 becomes O.
₂ rotates about, and move to point C, while the move to key 1 comes out forward, the key for movement in the same way as the key 1 is rotated about the O ₁ point in the present invention 1 Point A is B
Since the key 1 is moved to the point, the amount of movement of the key 1 to the front side is smaller than that in the conventional example.

As described above, according to the present embodiment, the radius of curvature of the substantially cylindrical sliding surface of the key 1 and the friction member is increased, and the length from the key tip to the center is set as the key tip and the fulcrum in the piano. By matching the length up to key 1
Will not come too close to you, and you will be able to get the exact same playing feel as a piano.

[Brief description of drawings]

1 is a side view of a keyboard device for an electronic musical instrument having a substantially cylindrical sliding surface according to an embodiment of the present invention, FIG. 2 is a side view showing a length of a piano keyboard from a key tip to a fulcrum, and FIG. FIG. 4 is a side view showing the movement of a key in the embodiment of the present invention and a conventional example, and FIG. 4 is a side view of a keyboard device for an electronic musical instrument having a substantially cylindrical sliding surface in the conventional example. 1 ...... key, 3 ...... friction _member, O 1, _{O 2} ...... radius of curvature of the center of the sliding surface.

Claims (1)

[Scope of utility model registration request] 1. A plurality of resin keys, which are arranged in parallel for each tone pitch and have a substantially cylindrical sliding surface at the rear end thereof, and a substantially cylindrical sliding surface at the rear end of the key. A keyboard device having a friction member made of resin to be inserted into, wherein the radius of curvature of the substantially cylindrical sliding surface is such that the length from the key tip to the center is the length from the key tip to the fulcrum of the piano key. A keyboard device for an electronic musical instrument, which has the same characteristics.