JPH06318077A - Keyboard device for electronic musical instrument - Google Patents

Abstract

PURPOSE:To provide a keyboard device for the electronic musical instrument which is corresponded to a similar musical performance to an acoustic piano. CONSTITUTION:Optimum relation is set between the opening/closing operation of key switches for keyboard performance detection and the timing of let-off effect, and the concrete timing between the key switch and let-off effect is set as follows. After the let-off effect starts, a 1st key switch for keyboard performance detection is turned ON and a keyboard performance begins to be detected. A 2nd key switch for keyboard performance detection is turned ON right before the let-off effect ends and the detection of the keyboard performance ends.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard device for an electronic musical instrument such as an electronic piano, and more particularly to a keyboard device for realizing a touch close to that of an acoustic piano.

[0002]

[Prior art]

(Structure of Conventional Example) In recent years, as digitalization of electronic pianos has progressed, the difference in sound quality between manufacturers has become smaller, and the touch feeling of the keyboard has become a major factor in determining product appeal. Among them, in the acoustic piano, when the key is pushed down slowly, there is a sudden change in the load immediately before the end of the key depression (hereinafter referred to as the let-off effect), which is one of the typical touches of the acoustic piano. It is believed that. In order to realize this acoustic piano touch, research to add a let-off effect to electronic pianos is being actively conducted.
Various structures have been devised. However, at present, there has not been a study including opening and closing of a key switch that detects keyboard performance at the same time as the acoustic piano touch.

An example of a conventional keyboard device for an electronic musical instrument will be described below by citing application number H5-14014 as a conventional example.

FIG. 2 is a side view of a conventional keyboard device for an electronic musical instrument. In FIG. 2, one end of the key 1 is supported on the chassis 2 as a fulcrum, and the other end is arranged in pitch order so that the other end can swing up and down. An inertial force applying hammer 3 is disposed below the key 1 so as to perform a swinging motion with the substantially central portion 4 as a fulcrum in conjunction with the pressing of the key. Also hammer 3 and key 1
A spring 5 is installed between the springs 5 so as to be biased in the return direction. A keyboard touch detection switch 6 is installed below the hammer. On the other hand, a let-off effect adding device 7 is provided near the rear end of the hammer.

(Operation of the conventional example) When the key 1 is pushed down in such a structure, one end 3a of the hammer 3 is pushed down and the keyboard performance detecting key switch 6 is turned on. Here, the key switch 6 is As shown in FIG. 4, it is generally composed of two sets of switches, and the first key switch 6a and the second key switch 6b are structured with a step x. When the first key switch 6a is turned on by pressing down the key 1, time measurement is started at the same time, and when the second key switch 6b is turned on, time measurement is ended at the same time, and the stroke difference measured during that time is converted into time. It detects the playing speed and controls the tone signal. On the other hand, the one end 3b of the hammer 3 is lifted up about the fulcrum 4 to drive the let-off effect adding device 7, and a load / stroke diagram as shown in FIG. 5 is obtained. In the conventional structure, the let-off effect and the opening / closing timing of the key switch for detecting keyboard performance have not been studied, and the opening / closing timing of the key switch is set as shown in FIG.

[0006]

However, in the above conventional structure, the stroke SL at which the let-off effect starts.
The first key switch is turned on before and the time measurement starts, so the key operation is stopped once before the let-off that is performed on an acoustic piano, and the key is pressed again to produce a sound. In the case of playing, there is a problem in that the time for measurement becomes long and the measurable time of the set is easily exceeded, and the data cannot be processed because it cannot be processed as performance data.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and an object thereof is to make it possible to cope with a performance similar to that of an acoustic piano by optimally setting the opening / closing timing of the key switch for detecting keyboard performance. It is a thing.

[0008]

In order to achieve this object, the keyboard device for an electronic musical instrument of the present invention sets the timing of opening and closing the key switch for detecting keyboard performance and the timing of the let-off effect in an optimum relationship. The specific timing of the key switch and the let-off effect is set as follows.

After the let-off effect starts, the first key switch for detecting keyboard performance is turned on, and detection of keyboard performance is started.

Immediately before the let-off effect ends, the second key switch for detecting keyboard performance is turned on, and detection of keyboard performance ends.

[0011]

With this configuration, the keyboard performance is always detected after the let-off effect starts, and the acoustic piano that stops the key-press operation once before the let-off effect and starts the key-press operation again to generate sound. Will be able to support the performance of.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the opening / closing timing of the key switch for detecting keyboard performance is a stroke deeper than the stroke SL at which the let-off effect starts. The first key switch for detecting keyboard performance is turned on to start detection of keyboard performance, and the let-off effect is started. The second key switch for detecting the keyboard performance is turned on before the stroke SF at which the key switch ends, and the opening / closing timing of the key switch is set so that the detection of the keyboard performance is completed.

Next, an embodiment of the operation of the let-off effect adding device will be described with reference to FIG.

The let-off effect adding device is arranged at a position where it engages with one end 3b of a hammer 3 which is vertically swingably driven by a key 1 on a rotation locus, and is rotatably supported by one end of an elastic body 8. It is composed of the roller 9 and the roller 9. With this configuration, when the one end 3b of the hammer 3 is further pushed down from the position where the one end 3b of the hammer 3 comes into contact with the roller 9 rotatably supported by the one end 8a of the elastic body 8 as shown in FIG. As shown in FIG. 3, one end 3b of the hammer 3 rotates the roller 9 to increase the amount of displacement of the elastic body 8 to the right in the figure, and rotates upward in the figure. Therefore, the hammer 3 moves while increasing the drag force of the elastic body. As it rotates, the key-pressing load rapidly increases and reaches its peak. When the key 1 is further pushed down, the one end 3b of the hammer 3 rotates upward as shown in FIG. 3 (C) while rotating the roller 9 to reduce the drag force of the elastic body 8. The hammer 9 will rotate while reducing the drag force, and the key pressing load will gradually decrease, until the end 3b of the hammer 3 ends up.
And the roller 9 are disengaged. The peak of this key-pressing load makes the fingertips feel a touch that is very similar to the let-off feeling of an acoustic piano.

According to the present embodiment configured as described above, the let-off start stroke S indicates the start of keyboard performance detection.
Since it is set deeper than L, even if a performance is performed in which a key press operation is stopped a little before the let-off start stroke SL and a key press is started again to produce a sound like a conventional keyboard, that performance is also performed. You will be able to detect it faithfully.

[0017]

As described above, according to the present invention, an electronic musical instrument such as an electronic piano can be played with the same playing technique as that of an acoustic piano simply by optimally setting the let-off effect and the opening / closing timing of the key switch for detecting keyboard performance. It is possible to realize an excellent keyboard device.

[Brief description of drawings]

FIG. 1 is a diagram showing a let-off effect of an electronic musical instrument keyboard device and an opening / closing timing of a keyboard performance detection key switch according to an embodiment of the present invention.

FIG. 2 is a side view showing a keyboard device for an electronic musical instrument used conventionally and in this patent.

FIG. 3 is an example of a let-off effect addition device used in this patent

FIG. 4 is a cross-sectional view of a key switch used in the past and this patent.

FIG. 5 is a diagram showing the let-off effect of a conventional electronic musical instrument keyboard device and the opening / closing timing of a key switch for keyboard performance.

[Explanation of symbols]

 1 key 2 chassis 3 hammer 4 fulcrum 5 spring 6 key switch for keyboard touch detection 6a first key switch for keyboard performance detection 6b second key switch for keyboard performance detection 7 let-off effect addition device 8 elastic body 9 roller

Claims (1)

[Claims] 1. A white key and a black key (hereinafter simply referred to as keys) which are supported by a fulcrum on a chassis and are arranged in pitch order so that the other end can swing up and down, and a piano touch is realized. It has a let-off effect addition device and two sets of key switches that are opened and closed by rocking the keys to detect keyboard performance, and detects the keyboard performance after the let-off effect starts at the opening and closing timings of the first and second key switches. The second key switch for keyboard performance detection is turned on immediately before the let-off effect ends, and the detection of keyboard performance is set to end. A keyboard device for electronic musical instruments.