JPH0220999B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a signal generating device for an electronic musical instrument, in particular, for transmitting the pressing force applied to the keyboard of a keyboard-type electronic musical instrument as an electrical digital signal, and reproducing this as music via a converting device. The present invention relates to a signal generating device for an electronic musical instrument.

Conventionally, for electronic musical instruments, in addition to simply controlling the instrument's on/off status by pressing a key, key press pressure is transmitted to conductive rubber, and this pressure change is captured by a change in resistance value to perform touch control or control. There are also known devices that provide so-called performance effects such as after control. However, with these devices, changes in key press pressure during performance are input as oscillation signals corresponding to the pitch of each key, and this is transmitted through a voltage-controlled amplifier and then output by a speaker.
Or, since it is recorded or stored through this circuit, this has the disadvantage of being susceptible to noise, and also has the disadvantage that the timbre and sound quality are easily restricted and easily deteriorated. In order to reproduce this signal as music, it is necessary to convert it to a digital signal and then convert it to a music signal before the amplifier circuit of the speaker. This has resulted in an enormous number of electronic musical instrument performance devices, and the number of conversion stages has increased. Along with this, the timbre and sound quality of the instrument were limited, and there was also the disadvantage of being susceptible to noise. In addition,
In the above-mentioned method of capturing the key pressing pressure by the change in the resistance value of the conductive rubber, the surface condition of the conductive rubber or the bonding condition of the conductive particles in the conductive rubber tends to change, so this is a combination of pressure and resistance. It is difficult to maintain a constant value relationship with good reproducibility, and the calibration device tends to be large.

The present invention relates to a signal generating device for an electronic musical instrument that solves these disadvantages, and is comprised of (a) conductive parts and insulating parts arranged alternately and spaced apart on the surface; a rolling flexible movable contact that forms a convex curved surface A as a whole;
b) It consists of a flat substrate having a fixed contact consisting of a plurality of electrodes provided opposite to the rolling movable contact, and the rolling movable contact is rotated by the pressing force applied to the keyboard. A signal is generated when the conductive portion is brought into contact with the electrode of the flat substrate to form a closed circuit, and then when this closed circuit is turned into an open circuit by rotation of the rolling movable contact, the adjacent It is characterized in that the electrodes form a closed circuit to generate a signal.

To explain this, as a result of various studies on signal generation devices for electronic musical instruments, the present inventor found that it is possible to adjust the up/down speed or stop time of each key of an electronic musical instrument, in other words, to adjust the up/down speed or stop time of each key of the electronic musical instrument, in other words, to adjust the fingertips based on the emotions of the instrument player. We confirmed that it would be better to directly transmit the change in the pressing force due to the movement of the robot as a digital signal, and then use a conversion device to pronounce, record, or store the time at which this digital signal was transmitted, and further studied this method. The present invention has been completed.

That is, the present invention provides a rolling type flexible movable contact in which conductive parts and insulating parts are arranged alternately and spaced apart from each other on the side of a substrate having a fixed contact, and these parts collectively form a convex curved surface A. , the movable contact is placed opposite to a fixed contact having multiple sets of electrodes, and the movable contact is rotated by the pressing force applied to the keyboard, and a closed circuit is created between the conductive part and the electrode on the flat substrate facing the movable contact. is formed, thereby generating a digital signal, and at this time, the rotational force of this rolling flexible movable contact is determined by the strength and speed of the pressing force applied to the same keyboard.
In other words, the rotation distances are made different, the number of electrodes facing this rolling type flexible movable contact is two or more, preferably three or more, and a closed circuit is formed between the different electrodes as the movable contact rotates. By doing so, it becomes possible to generate digital signals that reflect subtle changes in the pressing force on the keyboard and the speed of up and down operations that accompany the performer's musical thoughts, and can be reproduced as music via a conversion device. This is based on the experimental results of the inventor.

To explain this in more detail based on the attached drawings, FIGS. 1 to 4 all illustrate different embodiments of the signal transmitting device for an electronic musical instrument of the present invention, and FIGS. The figure shows a rolling type flexible movable contact. 1st
The rolling flexible movable contact 1 shown in Figures 1 and 2 is placed under the keyboard of a musical instrument (not shown), and it has a black color because carbon black is added as a conductive member. A plurality of conductive parts 21, 22, 23 formed in a striped shape by alternately arranging conductive parts and insulating parts that are white or gray because they do not contain a conductive member. A conductive portion 2 consisting of . It is set up like this. This rolling flexible movable contact 1
A plurality of sets of counter electrodes 41, 42, 4 are arranged opposite to each other.
A flat plate-shaped substrate 5 having 3, 44... is arranged, and these are rolling type flexible movable contacts 1.
When these are short-circuited by the rotation of the conductive portion 2, a closed circuit is formed and a signal is transmitted. The number of counter electrodes may be, for example, only 41-42 and 43-44, but there are two or more sets, preferably three or more sets.

In A, B, and C of FIG. 1, when pressing force is applied to the keyboard of an electronic musical instrument and the keyboard moves up and down, the movable contacts rotate (rotate) and the counter electrodes 41-42, 42-43,
43 to 44 are sequentially shown states in which a closed circuit is formed, and according to this, a digital signal that is delicately adjusted according to the key pressing force is transmitted. In addition,
This rolling type flexible movable contact has a cylindrical shape, and the conductive part 2 and insulating part 3 of the movable contact are shaped like a single cylinder in FIG. A plurality of plate-shaped conductive parts 2 extending in the axial direction are arranged in parallel and spaced apart from each other on the surface of the curved body or semi-cylindrical insulating part 3 (cut). The shape of the conductive portion 2 does not need to be limited to a plate shape; for example, the flat plate may have a dotted cross section by arranging many thin metal wires, or the flat plate may have a broken line shape, a round shape, a polygonal shape, etc. Conductive members in the shape of a star or a star may be arranged continuously in a line at intervals, and these may be arbitrarily determined depending on the arrangement of the counter electrode on the substrate. The movable contact 1 in FIG. 1 is shown in which conductive parts 2 are arranged independently and apart from each other on the surface layer of an insulating part 3, but this is, on the contrary, a molded body made of a conductive member. The insulating portions may be spaced independently from each other on the surface layer.

FIG. 2 illustrates another embodiment of the invention, also using rolling flexible movable contacts, but with a plurality of conductive sections 2 and a plurality of insulating sections 3. If the pitch is extremely small, for example
Alternately laminated and integrated with a pitch of 30 to 2000μm,
It is shown that it is supported on a support (not shown) having a cylindrical curved surface and forms a convex curved surface A as a whole. In this embodiment, in order to facilitate alignment with the counter electrode provided on the flat substrate, when a closed circuit is formed by rotational contact with the counter electrode, this The stacking pitch is made smaller than the arrangement pitch of the counter electrode so that at least one conductive part contacts the fixed contacts 41, 4.
2, 43, and 44 respectively form counter electrodes with the common fixed contact 4.

The conductive portion 2 itself of the movable contact 1 in the embodiment shown in FIG. They may be continuously provided in a shape. Further, the common fixed electrode 4 on the flat substrate 5 in FIG. 2 may be placed under each keyboard, but it may also be shared by an appropriate number of keys, for example, for each octave.

FIG. 3 illustrates another embodiment of the present invention, which is a disc-shaped insulator having a convex curved surface A formed by embedding a plurality of conductive parts spaced apart from each other on its surface. This is an example of the case where a rotating disk-shaped rolling flexible movable contact 1 is used. It is housed in a synthetic resin frame 6 having a dust-proof structure and having a frame 5'. Inside this frame, a lever 8 is suspended below the keyboard and is locked between the movable contact 1' and the frame and moves up and down as the keyboard 7 is pressed.
When the keyboard 7 is pressed, the movable contact 1' rotates accordingly, and this contacts the fixed contact on the board 5' to form a closed circuit here. In addition, this keyboard 7
is supported at one end by a post 9, which is equipped with springs 10, 10', and lever 8
moves up and down as the keyboard 7 is pressed and released, so the oscillation of the digital signal that accompanies the performance operation by pressing the keyboard 7 is performed in accordance with the duration of this pressing, resulting in subtle performance effects. Demonstrated.

FIGS. 4A, 4B, and 4C show still another embodiment of the present invention, in which a signal device having a push button structure made of a flexible rubber-like elastic material is illustrated.
The shape of the rolling type flexible movable contact 1'' in FIGS. 4A and 4B is the conventionally used ball-cut shape disposed on the lower surface of the ceiling part 12' of the push button 12, which has an inverted tip-shaped cut end surface. However, on its surface, a plurality of conductive parts 2... are provided in a striped manner, and the whole forms a convex curved surface A.The legs of this ceiling part 12 are fixed contacts. 41,
42, 43, 44, 45 . When the pressure is transmitted to the movable contact 1'' disposed on the unfixed ceiling part 12' of the push button 12, the movable contact 1'' rotates due to this pressing force, thereby causing the fixed contact 41-4 to rotate.
2, 42-43, 43-44, 44-45, . . . , a closed circuit and an open circuit are formed, and a digital signal is accordingly transmitted. In addition, A and B in FIG. 4 show different shapes and positions of the movable contacts 1'', and FIG. Fig. 4C shows the mode of operation, and the conductive member 1 is shown in the center of the figure.
A contact consisting of 5 is provided. The conductive member 15 is designed to generate a current or a voltage that changes the strength of the keyboard position during key depression, that is, a scale-only signal or a digital signal. In addition, the conductive member 1 in FIG. 4C
Instead of 5, an insulating rubber or rubber sponge member may be provided to function as a mere stopper.

As explained above, in the electronic musical instrument generator according to the present invention, the conductive portion and the insulating portion are spaced apart and arranged alternately so that the surface of the rolling flexible movable contact becomes a convex curved surface. Since a signal is generated when the electrodes on the flat substrates placed opposite each other are sequentially contacted to form a closed circuit, subtle changes in the pressing force on the keyboard due to the musician's musical thoughts can be detected as a digital signal. Since it can be generated as follows, the effect is extremely large.

[Brief explanation of drawings]

The figures all show the signal generator of the present invention, and Figures 1A, B, and C are schematic vertical cross-sectional views showing the rotating state when a rolling type flexible movable contact is used, and Figure 2 3 is a conceptual diagram when a rolling type flexible movable contact of another embodiment is used, FIG. 3 is a schematic vertical sectional view when a rotating disk type flexible movable contact is used, and FIGS. 4A, B, and C. 1A and 1B are schematic longitudinal sectional views of different embodiments in which a rolling type flexible movable contact having a push button structure is used. 1, 1', 1''... Rolling flexible movable contact, 2... Conductive part, 3... Insulating part, 4, 4
1, 42, 43, 44, 45...Fixed contact, 5,
5', 5''... Flat board, 7... Keyboard, 12...
Ceiling section, 14...actuator.

Claims (1)

[Scope of Claims] 1. A rolling type flexible movable contact comprising a conductive part and an insulating part arranged alternately and spaced apart on the surface, and in which both these parts collectively form a convex curved surface A. , (b) a flat substrate having a fixed contact consisting of a plurality of electrodes provided opposite to the rolling movable contact, and the rolling movable contact is rotated by the pressing force applied to the keyboard. A signal is generated when the conductive part is brought into contact with the electrode of the flat board to form a closed circuit, and then when the closed circuit is turned into an open circuit by the rotation of the rolling movable contact, the adjacent 1. A signal generating device for an electronic musical instrument, characterized in that a closed circuit is formed in an electrode to generate a signal.