JPH0139118B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD OF THE INVENTION The present invention relates to an electronic keyboard musical instrument capable of controlling the touch feel of a keyboard.

``Prior art and its problems'' In conventional keyboard electronic musical instruments, the keys are simply pressed against the force of a spring, so the touch feel of the keys is different from that of an ordinary piano, and therefore, the touch of the keys is different from that of an ordinary piano. The drawback was that it was difficult for those who were familiar with it to play.

Therefore, by attaching a magnet to the key or its frame and using its attraction force, or by attaching a weight to the key, the inertial force of the keyboard is increased, thereby obtaining a key touch feeling similar to that of a normal piano. A device that enables this has been developed and put into practical use.

However, in such conventional keyboard electronic musical instruments, the touch feeling of the keys can only be selected by switching the switch, and therefore the tone selection switch can select a predetermined tone (for example, piano sound, organ sound, or cembalo sound). etc.), it was not possible to obtain a key touch feeling that corresponded to the selected tone in conjunction with the selected tone.

In other words, in conventional keyboard electronic musical instruments, the act of selecting by switching the timbre selection switch and the act of selecting a predetermined key touch feel are unrelated, so even if a certain timbre is selected by the timbre selection switch, , it was not possible to obtain a key touch feeling suitable for the tone. When a certain tone is selected, the performer judges what kind of key touch feeling corresponds to that tone, and then operates the key touch switch to select the key touch feeling. Therefore, two operations were required: selecting a tone color and selecting a key touch.

This invention was made in view of the above circumstances,
The purpose is to provide an electronic keyboard musical instrument in which a desirable key touch feeling can be obtained in conjunction with the selection of tone color.

``Means for Solving the Problems'' This invention provides a keyboard means for performance operation, a timbre selection means for selecting a timbre, and a control signal for generating a control signal corresponding to the timbre selected by the timbre selection means. The present invention is characterized by comprising: generating means; and key touch changing means for changing the key touch of the keyboard to a key touch that matches the selected timbre based on the control signal.

"Embodiment" An embodiment of the present invention will be described below with reference to the drawings.

The keyboard electronic musical instrument of this embodiment includes a mechanical part around the keyboard shown in FIGS. 1 to 4, and an electrical part shown in FIG. 5.

First, to explain the mechanical parts around the keyboard, in Figs. The rear end of the keyboard frame 2
It is rotatably supported on the fulcrum part 3 of. Then, the key 1 is urged clockwise around the fulcrum 3 in FIG. 1 by the force of the spring 4.
Normally, the stopper piece 5 is held in a non-operating position by being brought into contact with a felt cushioning material 6 provided on the keyboard frame 2, and on the other hand, when a key is pressed, the felt cushioning material 6 provided on the keyboard frame 2 is held in a non-operating position. Cushioning material 7
The guide member 7 rotates counterclockwise in the figure and comes into contact with the buffer material 7, thereby reaching the rotation limit position in the same direction. That is, the key 1, the fulcrum 3, the spring 4, etc. constitute a keyboard means 100 for playing.

A groove 8 is formed at a predetermined location inside the side wall of the key 1, and a recess 8' is formed at the innermost part of this groove 8 (see FIG. 2). The provided shaft 10 is press-fitted by utilizing some elasticity of the side wall of the key 1, and then fitted into the recess 8', so that the shaft 10 is rotatably disposed. A weight 11 made of lead or the like is attached to the other end of the arm 9. And this arm 9 has weight 1
1 in the clockwise direction in FIG. 1, and is brought into contact with a support member 12 normally provided on the keyboard frame 2.

A rod 41 is arranged below the weight 11 of the arm 9 and extends in the direction in which the keys 1 are arranged. This rod 41 is attached to one end of a bent portion 42' of a substantially L-shaped manual lever 42 that moves integrally with the shaft 43.
The other end is attached to one end of the other bent portion 42' (the other end of the manual lever 42 does not exist),
It is attached to the keyboard frame 2 so as to be substantially vertically movable. The other end of the hand-operated lever 42 is designed to protrude to the outside, and an operator 42'' is inserted and fixed at the tip of the hand-operated lever 42.The hand-operated lever 42 is designated by reference numerals P1 to _P1 in FIG. It is configured to be locked in five positions indicated by _P5 by a click mechanism.This click mechanism is provided on the side wall of the keyboard frame 2 or the side plate of the instrument body, for example, as shown in FIG. This is achieved by corrugating the abutting surface B between the protrusion 58 and the worm wheel 45, which will be described later, and by inserting a strong coil spring 57 through the shaft 43 and fitting it into the recess 58' of the protrusion 58. However, it goes without saying that other mechanisms may be used.
The positions indicated by P ₁ to _{P 5} are detected by position sensors 44 provided at predetermined positions on the keyboard frame 2. Note that the position sensor 44 is
It has an actuator 44' that moves following the rotation of the manual lever 42, and this actuator 44' is biased by a coil spring into a compressed state at the _P1 position, and is fully extended at the _P5 position. It is made to be. The actuator 44' is configured such that, for example, the resistance value changes depending on its position. A worm wheel 45 is provided on the shaft 43, and a worm 46 is meshed with the worm wheel 45. As shown in FIG. 4, the worm 46 is attached to a shaft 47 having a cross-shaped cross section so as to rotate integrally therewith and to be able to slide in the directions of arrows A and B in FIG. A flange 48 is provided at one end of the shaft 47, and this flange 48 is connected to an output shaft 50 of a motor 49. Further, a flange 51 is provided at the other end of the shaft 47, and this flange 5
1 is rotatably supported by a bearing 52.

Further, an operator 53 is provided at the tip of the arm 9. On the trajectory drawn by this operator 53,
A part of the rear end of the keyboard frame 2 is cut and raised so that a movable contact piece 55 of a switch 54 for detecting a contact time difference attached to the cut and raised part 2' is positioned. Further, a cushioning material 56 made of felt is provided at a location corresponding to the tip of the arm 9 of the key 1.

Next, the operation of the upper air composition device will be explained.
In this embodiment, when the manual lever 42 is operated to reach one of the positions P ₁ to _{P 5} ,
Along with this, the position of the rod 41 reaches a position corresponding to one of the symbols Q ₁ to _{Q 5} , and as a result, the initial position of the arm 9 and the weight 11, that is, the position when the key 1 is not pressed, becomes one of the five positions. For example, the manual lever 42 is in the corresponding mode.
When the rod 41 is in the position shown by P ₁ and the rod 41 is in the position shown by the symbol Q ₁ , the arm 9 and the weight 11 are in the initial position shown by the solid line in FIG.
2 is in the position indicated by the symbol P ₅ and the rod 41 is in the position indicated by the symbol Q ₅ , the arm 9 and the weight 1
1 is at the initial position indicated by the two-dot chain line in the figure.

For example, when the key 1 is pressed against the force of the spring 4 in state P ₁ shown by the solid line in FIG. 12
It rotates counterclockwise in the figure using the fulcrum as the fulcrum. Therefore, the force resisting the spring 4, the weight of the arm 9 and the weight 11, etc. act as reaction forces on the fingertip that presses the key 1. Also, since normal keystrokes are performed with uniform motion, during the transition from a stationary state to uniform motion, that is, when the acceleration at the start of keystroke is large,
Since a force is required to accelerate the arm 9 and the weight 11, the reaction force acting on the fingertip increases temporarily. Then, the displacement of the key 1 becomes large, and there is no need to apply any force to the arm 9 and the weight 11, and the reaction force decreases. At the most depressed position of the key 1, the tip of the arm 9 (the weight 11) comes into contact with the cushioning material 56. As a result, it is possible to prevent the rebound force from being transmitted to the fingertips that hit the key 1, thereby preventing the so-called rebound feeling from occurring, and it is possible to obtain a key touch feeling similar to that of an ordinary piano.

Also, when pressing a key, the switch 54 is activated by the operator 53.
Push up the movable contact piece 55 against its elastic force,
This turns on the switch 54 and electrically generates the sound corresponding to the pressed key 1. Even if the key 1 is kept in the most depressed position, the position of the operator 53 will settle down to approximately the position drawn by the two-dot chain line. That is,
The movable contact piece 55 is configured to be driven only when a key is pressed, and if the key is pressed very weakly (slowly), the movable contact piece 55 is not driven and no sound is produced.

On the other hand, in the state P ₅ shown by the two-dot chain line in FIG. 1, the arm 9 is pushed up together with the weight 11 to the uppermost position by the rod 41, and the arm 9 and the weight 11 are moved counterclockwise in the figure with the axis 10 as the center. When the key 1 is pressed against the force of the spring 4 in the rotated position in the direction shown in FIG. The key switch is rotated counterclockwise, and the key switch is driven by the key 1 or the arm 9, and the arm 9 does not come into contact with the support member 12 even when the key is finished being pressed. Therefore, only the force acting against the spring 4 acts as a reaction force on the fingertip that presses the key 1. As a result, a key touch feeling that simply resists the force of the spring 4 can be obtained.

Further, by setting the manual operation lever 42 to the intermediate positions P ₂ , P ₃ , and P ₄ between the above-mentioned two positions, it is possible to freely select the key touch of the pipe organ, electronic piano, or electric piano at any time. In this case, the arm 9 does not come into contact with the support member 12 at the initial position of the key rotation, and initially there is a feeling of the key being touched against the force of the spring 4, and in the middle of the rotation, the arm 9 is at a position where it comes into contact with the support member 12. Therefore, in addition to the force resisting the spring 4, a force giving acceleration to the weight 11 is required. Therefore, it is possible to realize the touch feeling of the key 1, which is light at first, heavy in the middle, and light again at the end.

Next, FIG. 5 is a circuit diagram of the electrical components related to the keyboard touch control of the electronic keyboard musical instrument, that is, the electrical components that control the initial positions of the arm 9 and the weight 11 by driving the motor 49. The explanation will be based on. The feature of this circuit is that the arm 9
The key point is that the initial position of the key can be varied and the key touch feeling can be varied as appropriate.

In FIG. 5, 61a to 61e are switches (tone selection means) for presetting tones for an organ, pipe organ, electronic piano, electric piano, and piano. Now, when the power switch (not shown) is turned on, a one-shot initial clear signal is generated.
IC is generated, and this IC signal causes an RS type flip-flop (hereinafter referred to as FF) control signal generation means 6
1a to 62e are reset. At this time, for example, if the manual lever 42 is at _the position indicated by the solid line in _FIG . The display lamp 63e indicating the touch sensation lights up.

For example, when the organ switch 61a is turned on in this state, the signal "1" is output to the OR 88 and the differential circuit 8.
The FFs 62a to 62e are reset through the switch 61a through the switch 61a, and the reset is canceled when the output signal of the differentiating circuit 89 falls, so the FF62a is set by the push button signal "1" of the switch 61a. FF62
When a is set, the output "Q=1" is supplied to the tone color control circuit 64, which sets the tone of the tone source signal from the tone generator circuit (not shown) to "organ". Here, the flip-flops 62a to 62e constitute a control signal generating means that generates a control signal according to the tone selected by the tone color selecting means, and is connected to a tone source circuit, a tone control circuit 64, and a speaker (not shown). This constitutes a musical sound generating means. On the other hand, "Q=1" of FF62a is ANDed with the clock from the display lamp blinking oscillator OSC by AND AD1 and becomes a blinking signal, and this blinking signal is ORed or OR1
Since the signal is supplied to the display lamp 63a through the display lamp 63a, the display lamp 63a blinks to indicate that the touch feeling is currently being transferred from "piano" to "organ" (waiting for touch feeling setting). Furthermore FF62a
“Q=1” turns on the gate 65a and turns on the gate 6
Reference voltage 4V corresponding to switch 61a from 5a
is output and input to the (+) terminal of the differential amplifier 66. On the other hand, the output voltage from the position sensor 44 is input to the (-) terminal of the differential amplifier 66, but since it has been preset to the piano, the (-) terminal is 0 [V], and as a result, the differential amplifier 66 66 is approximately equal to the power supply voltage supplied to it (+)V
[V] is output.

The A/D converter 67 has 3 inputs ((+)V [V],
0 [V], (-)V [V]), (1, 1),
It outputs (1, 0) or (0, 1), (0, 0), and since +V [V] is currently input, the output is "L1 = 1, L2 = 1" and 81,
Exclusive OR 82 and Noah 83 are supplied. As a result, the output signal "1" is supplied from the AND 81 to the normal rotation terminal of the motor control circuit 68 via the OR 86, so that the motor 49 rotates in the normal direction, causing the shaft 47 to rotate, for example, to the right. As a result, the worm 46 moves, for example, to the right and comes into contact with the flange 51. Then, the manual lever 42 is gradually rotated to the left by the rod 41, and the arm 9 is pushed up.
When the lever 42 comes to the _P5 position, the inputs of the differential amplifier 66 match, so the output is 0.
[V] is output, and the A/D converter 67 outputs "L1=0, L2=1". Therefore, "0" is output from the AND 81 and the NOR 83, and "1" is output from the exclusive OR 82, so the motor 49 is temporarily stopped. However, since the signal that detects that the output of the AND 81 has become "0" is led to the one-shot circuit 69 via the delay circuit 84, the reverse signal is OR'd only for the one-shot period (approximately 1 to 2 seconds) of the one-shot circuit 69. It is supplied to the motor control circuit 68 via 87. This one-shot signal (reverse signal) positions the worm 46 exactly at the center, changes the initial position of the arm 9, and completes the process of changing from piano touch to organ touch. When this step is completed, the actuator 44' of the position sensor is at the positions _P5 and _P'5 , so the signal "1" is transmitted to the conductor 44c and the movable contact 44.
f, 5 conductors P′ ₁ to P′ ₅ and 4 insulators d ₁ to _{d 4}
A conductor that is one of the fixed contact materials 44d consisting of
Since the signal is supplied to the OR1 via _P'5 , the display lamp 63a is lit. Here, the differential amplifier 66, motor control circuit 68, motor 49, shaft 47, worm 46, worm wheel 45, arm 9, etc. control the keys of the keyboard by control signals generated from the flip-flops 62a to 62e. touch the tone selection means 61a~
61e constitutes a key touch changing means 101 that changes the key touch to match the tone color selected.

Next, a case will be described in which the touch feeling is changed from organ touch (position P ₅ ) to pipe organ touch (position P ₄ ). When the pipe organ switch 61b, which is a tone and touch setting switch, is turned on, the FF62b is set and outputs "Q=1", and the tone setting circuit 64 presets the tone of the pipe organ, and the OSC clock At AND AD2, a blinking signal is generated and the display lamp 63b is decreased. On the other hand, the gate 65b is turned on and a reference voltage of 3V is supplied to the (+) terminal of the differential amplifier 66. In addition, the voltage of P5 (4V) is applied to the (-) terminal of the resistor 44a, the movable contact 44e, and the conductor 4.
4b, the (-)V [V] is output from the differential amplifier 66, and the A/D inverter 67
"L1=0, L2=0" is outputted from the circuit, and this output signal is led to the reverse terminal of the motor control circuit 68 via the NOR 83 and the OR 87. The motor 49 is rotated in reverse by this control signal, and after bringing the worm 46 into contact with the flange 48, the manual lever 42 is activated.
Rotate to position P ₄ . This lever 42 is P ₄
When the motor control circuit 68 detects that the motor has rotated to the position shown in FIG. The worm 46 is moved to a substantially central position. This completes the process of changing from organ touch to pipe organ touch. When this step is completed, the display lamp 63b is turned on in the same manner as described above. Thereafter, timbre and touch settings are made in the same manner using the switches 61a to 61e.

The reason why the worm 46 is controlled to be set at the center position after setting the touch feeling is to prevent a case in which manual setting cannot be performed after electric setting if this control is not performed. In other words, it is assumed that the electric setting is set to _P3 . In this case, since the worm 46 is not in the center position but in contact with one of the flanges, it cannot be moved further in the direction of contact by manual operation.

As described above, according to this keyboard electronic musical instrument, by simply selecting and specifying a tone as one of the predetermined tones (e.g., piano sound, organ sound, etc.) using the tone selection switch, the selected tone can be selected at the same time. You can get a key touch feeling that corresponds to the key touch.

The present invention is not limited to the above-mentioned embodiments, but can also be applied to a keyboard device having an arm (hammer member) above the key, such as an action mechanism for an upright piano.

"Effects of the Invention" As explained above, according to the present invention, there is provided a keyboard means for performance operation, a timbre selection means for selecting a timbre, and a control signal corresponding to the timbre selected by the timbre selection means. The control signal generating means generates a control signal, and the key touch changing means changes the key touch of the keyboard to a key touch that matches the selected tone color according to the control signal. , you can obtain the optimal key touch feel for that tone.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the present invention, FIG. 2 is a bottom view of a part thereof, FIG. 3 is a rear view of the main part, and FIG. 4 is a sectional view taken along the line - in FIG. 1. FIG. 5 is a circuit diagram regarding the key touch control. 1...Key, 4...Spring, 9...Arm, 11...
Weight, 13... Bar, 14... Shaft, 15... Cam, 49
...Motor, 61a-61e...Switch (tone selection means), 62a-62e...Flip-flop (control signal generation means), 64...Tone control circuit, 68...
Motor control circuit, 100...Keyboard means, 101...Key touch changing means.

Claims (1)

[Scope of Claims] 1. A keyboard means for performance operation; a timbre selection means for selecting a timbre; a control signal generation means for generating a control signal according to the timbre selected by the timbre selection means; An electronic keyboard musical instrument comprising: key touch changing means for changing the key touch of the keyboard to a key touch that matches the selected tone color based on a control signal.