JPH05181455A - Keyboard device - Google Patents

Abstract

PURPOSE:To provide the keyboard device which can generate a musical sound having characteristics corresponding to a difference in the rotational force of a hammer arm based upon a difference in the depressing force of a key even when the key is depressed at the same keying speed. CONSTITUTION:The keying speed of the key provided rotatably on a keyboard chassis 2 is detected by SW1 and SW2 and the pressing force based upon the rotation of the hammer arm 21 which is rotated as the key 5 is depressed and provided rotatably on the keyboard chassis 2 so as to give the key 5 a feeling of a key touch is detected by a 3rd switch SW3 for depressing force detection. Then the timbre of the musical sound to be generated is controlled according to the depressing force of the hammer arm 21 detected by the 3rd switch SW3 for depressing force detection and the keying speed detected by the switches SW1 and SW2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard device capable of generating a musical sound with characteristics corresponding to a key pressing speed and a key pressing force.

[0002]

2. Description of the Related Art Conventionally, there is known an electronic musical instrument capable of generating a musical tone with a volume and a tone color corresponding to a key pressing speed.

[0003]

By the way, according to the above-mentioned conventional keyboard device, it is possible to generate a musical tone with a volume and a tone color according to the key pressing speed, but the key pressing speed is the same. Even if there is, the sound volume and timbre of the musical tone to be generated should be different between when the key is pressed strongly and when the key is released with weak force. There was a problem that it became. The present invention has been made in view of such conventional problems, and even when a key is pressed at the same key pressing speed,
An object of the present invention is to provide a keyboard device capable of generating a musical sound having a characteristic according to the difference in the turning power of the hammer arm, which is caused by the difference in the key pressing force of the key.

[0004]

In order to solve these problems, the present invention provides a key rotatably provided on a keyboard chassis and a key pressing speed detection for detecting the key pressing speed of the key. Means, and a hammer arm that is rotated in response to a key depression operation of the key and is rotatably provided on the keyboard chassis in order to give a touch feeling to the key. This hammer
Pressing force detecting means for detecting the pressing force of the hammer arm accompanying the rotation of the arm, the pressing force detected by the pressing force detecting means and the key pressing speed detected by the key pressing speed detecting means. And a control means for controlling the characteristics of the generated musical sound based on

[0005]

According to the present invention, the key pressing speed of the key rotatably provided on the keyboard chassis is detected by the key pressing speed detecting means, and the key is rotated in response to the key pressing operation. Then, in order to give a touch feeling to the key, the pressing force associated with the rotation of the hammer arm rotatably provided on the keyboard chassis is detected by the pressing force detecting means. When,
The characteristic of the generated musical sound is controlled based on the pressing force of the hammer arm detected by the pressing force detecting means and the key pressing speed detected by the key pressing speed detecting means.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to illustrated embodiments. 1 is a sectional view showing a keyboard device according to an embodiment of the present invention, FIG. 2 is an overall block diagram showing an electronic circuit configuration used in the keyboard device shown in FIG. 1, and FIG. FIG. 6 is a diagram showing an operation flow chart of the main CPU 200 in FIG.

As shown in FIGS. 1 to 3, in the keyboard device according to this embodiment, a metal plate keyboard chassis 2 and a chassis support plate 3 are provided on the upper surface side of a synthetic resin musical instrument main body 1. And a screw 4 or the like. A plurality of keys 5 made of synthetic resin are arranged in parallel on the upper surface side of the keyboard chassis 2. The rear end of the key 5 is attached to a key support member 6 provided on the rear end of the upper surface of the keyboard chassis 2 so as to be vertically rotatable by a support shaft 7. The key 5 is biased upward by the action of a hammer arm 21 described later,
Usually, a substantially L-shaped stopper piece 9 formed at the lower end of the front portion of one of the side plates 8 is fixed to the lower surface of the keyboard chassis 2 through a guide hole 10 formed in the keyboard chassis 2. The upper limit position is regulated by coming into contact with the belt-shaped stopper member 11 thus formed. A belt-shaped stopper member 12 for restricting the lower limit position of the key 5 is fixed to the upper surface of the keyboard chassis 2 in the downward direction of the stopper piece 9. A guide member 13 is provided on the front surface of the keyboard chassis 2 for preventing lateral movement of the key 5.

At the center of the lower surface of the key 5, a hammer arm is provided for giving a key touch feeling to the key 5 when the key 5 is pressed.
21 is arranged. This hammer arm 21
The arm main body 22 made of synthetic resin, which includes an arm central portion 22a, a non-pressing side arm portion 22b, and a weight side arm portion 22c.
Is equipped with. Arm central portion 22a of arm main body portion 22
Is mounted on a hammer support member 25 mounted on the keyboard chassis 2 by an arm support shaft 26 so as to be vertically rotatable. The non-pressing side arm portion 22b extends in the upward direction of the keyboard chassis 2 through a fixing hole 23 formed in the keyboard chassis 2, and its tip portion has
A non-pressing portion 28 that is pressed by the lower surface of the key 5 is formed. Also, the weight side arm portion 22c of the arm body portion 22
An arm weight 27 for applying an inertial force to the arm body 22 is embedded on the side. Therefore, the hammer arm 21 urges the key 5 from the lower side to the upper side by the weight of the arm weight 27. Also, the weight side
A belt-shaped braking member 29 and a sound deadening member 30 are fixed to the lower surface of the keyboard chassis 2 that faces the upper surface of the drum portion 22c.

Further, a switch pressing portion 31 is formed on the central upper surface of the hammer arm 21. At a position of the keyboard chassis 2 facing the switch pressing portion 31, a rubber switch 32 pressed by the switch pressing portion 31 is fixed via a circuit board 34. The rubber switch 32 includes two first switches SW1 that sequentially perform switching operation with a time difference according to the key pressing speed of the key 5.
And a second switch SW2. next,
FIG. 1 is an overall block diagram showing an embodiment of an electronic circuit used in the keyboard device according to this embodiment.

The main CPU 200 is the keyboard device KS.
The main CPU2
To the input side of 00, a keyboard information generation device 202 that generates keyboard information corresponding to the key pressing operation of the keyboard unit 201 and outputs the keyboard information is connected, and this main CPU 200 is also connected. On the output side of the musical tone generating device 20, a musical tone having a pitch corresponding to the keyboard information output from the keyboard information generating device 202 is generated with a tone color designated by a tone color switch of the control switch group 203.
4 is connected, and a display device 205 for displaying various parameters of the musical sound designated by various switches of the control switch group 203 is also connected. Since the musical tone output from the musical tone generating device 204 is a digital musical tone signal in this embodiment, the D / A
After being converted into an analog tone signal by the converter 206,
It is amplified by the amplifier 207 and is emitted outside as a musical sound from the speaker 208. ROM209 and R
The AM 210 is a storage unit that stores various data used when controlling the main CPU 200, and a storage unit that digitally stores the digital tone signal.

In such a structure, the CPU 20 when the key 5 is depressed according to the flow chart shown in FIG.
The control of 0 will be described. First, when the power is turned on,
A reset signal is sent from the main CPU 200 to the keyboard information generating device 202, and the internal register SW1EV, the internal register SW2EV, and the key pressing speed measuring timer TIMER for each key 5 of the keyboard information generating device 202 are cleared to 0. ..

When any one of the keys 5 is depressed in this state, first, the value of the internal register SW2EV indicating the state after the switching operation of the third switch SW3 for detecting the pressing force is changed. It is judged whether or not it is "2", but at this stage, since it is not in the state after the switching operation of the third switch SW3 for pressing force detection is completed (3-1 = NO), the next step (3- The process proceeds to 2), and in this step, it is determined whether or not the first switch SW1 is initially switched with the start of the key depression operation of the arbitrary one key 5. If YES, if the internal register SW1EV is still 0 (3-3 = YES), the internal register SW1EV is changed from 0 to 1, and
The key pressing speed measuring timer TIMER is set to 0, and then the counting of the key pressing speed measuring timer TIMER is started (3-4). In the step (3-2),
If the first switch SW1 is not performing the switching operation (3-2 = NO), it is determined whether the internal register SW1EV is 0 (3-16), and if it is still 0 (3-).
16 = NO), if the count value of the key pressing speed measuring timer TIMER is less than or equal to the set value TIM1 (3-17 = YE
S), and the internal register SW1EV is set to 0 (3-1)
8).

Further, the key depressing operation of the key 5 progresses, and in the next step, it is judged whether or not the second switch SW2 is switched (3-5). If YES is determined, if the internal register SW2EV is still 0 (3-
6 = YES), the internal register SW2EV is set from 0 to 1
After setting (3-7), the key pressing speed measuring timer TIM
The count value of ER is measured, and it is determined whether or not the count value is the count maximum value TIM2 (3-
8) If it is determined that the count value is equal to or greater than the count maximum value TIM2 (3-8 = YES), the key 5
Is considered to have been operated at an abnormally slow key pressing speed, and the key pressing speed of this key 5 is judged to be inappropriate. In order to indicate this, an error time data ERRTIME indicating an inappropriate key pressing speed is input to the value of the key pressing speed information VELDATA indicating the key pressing speed of the key 5, and a key pressing speed measuring timer is also input. TIMER is cleared to 0 again (3-9).

Further, the key depression operation of the key 5 progresses, and the second key
As a result of measuring the count value of the key pressing speed measuring timer TIMER at the stage where the switch SW2 is operated and the internal register SW2EV is in the state of 1, the count value is compared with the count value TIM3. It is judged whether it is large (3-11), and as a result,
The value of the count value TIM3 is the key pressing speed measurement timer TIM.
When it is smaller than the count value of ER (3-11 = N
O), shift to the next step, and count value TIM3
Up to the value of, the 121 rotates about the arm support shaft 26 in the counterclockwise direction in the figure, and the weight side arm portion 22c side portion of the hammer arm 21 is rotated. When the third switch SW3 for pressing force detection fixed to the lower surface of the circuit board 34 is operated (3-12 = YE
S) sets PRSDATA to 1 (3-13), and then, together with the PRSDATA 1, sets the key depression speed information VE.
The value of LDATA is used as the key pressing speed information and the musical sound generating device 20
4 (3-14).

On the other hand, when the count value TIM3 is greater than or equal to the count value of the key pressing speed measuring timer TIMER (3-
11 = YES), the hammer arm 21 does not rotate counterclockwise in the drawing with the arm support shaft 26 as the center of rotation, or it rotates. Therefore, for the pressing force detection. The third
Even when the switch SW3 is operated for switching, the third switch SW3 is treated as being not operated for switching, and after setting PRSDATA to 0 (3-15), the key pressing speed information VE is set together with 0 of PRSDATA.
The value of LDATA is used as the key pressing speed information and the musical sound generating device 20
4 (3-14). Along with the PRSDATA 1 or 0, the key depression speed information VELDATA
When the value of is output to the musical sound generating device 204 as the key pressing speed information, at the same time, the output of such information is completed and the internal register SW2EV indicating that the key is being pressed is set to 2 (3- 14).

When the key 5 is pressed and then the key 5 is released, the internal register SW1EV, the internal register SW2EV, and the key pressing speed measuring timer TIMER corresponding to the key 5 are reset. , All are cleared to 0, and preparations are made for another key depression operation of the key 5.

As described above, the keyboard apparatus according to this embodiment operates, but in this embodiment, the key pressing speed of the key 5 is the same, and therefore the key pressing speed information VELD.
Even if the ATA is the same, the tone color of the generated musical tone is controlled according to the magnitude of the key pressing force of the key 5.

That is, as shown in FIG. 4, when the key pressing operation speed of the key 5 is high, the count value of the key pressing speed measuring timer TIMER is small, and therefore, the tone generating device 204
Although the value of the key pressing speed information VELDATA output to the key sound generator becomes small, the smaller the value of the key pressing speed information VELDATA is, the larger the volume of the musical sound output from the musical sound generating device 204 becomes (Fig. 4 (A),
On the contrary, the larger the value of the key pressing speed information VELDATA, the smaller the volume of the musical sound output from the musical sound generating device 204 ((B) and (D) of FIG. 4). reference). However, in the case of this embodiment, of these, the value of the key pressing speed information VELDATA is small, and therefore the volume of the musical sound output from the musical sound generating device 204 is large (see (A) and (C) of FIG. 4). ), The key pressing speed of the key 5 is the same, and therefore, even when the key pressing speed information VELDATA is the same, for example, as shown in FIG. The third switch SW3 for detecting the pressing force is activated because the keys are operated so that the turning power of the hammer arm 21 is weakened by playing the keys one after another at a high playing speed while reducing the pitch. When the switch is not operated (third switch SW3 = OFF), the key depression speed information VELDATA is set to 0, and in response to this, the tone color of the generated musical tone is controlled to be the A tone color, for example.

On the contrary, for example, as shown in FIG. 5 (b), a plurality of keys 5 are simultaneously played at a slow playing speed while increasing the magnitude of each key pressing force of the keys 5, and therefore, the hammer is used. When the third switch SW3 for detecting the pressing force is operated (300 = ON) because the key pressing operation is performed so that the turning force of the arm 21 becomes strong, the key pressing speed information V
ELDATA is set to 1, and in response to this, the tone color of the generated musical tone is controlled to be the B tone color, for example.

According to this structure, even when the key 5 is pressed at the same key pressing speed, the turning force of the hammer arm 21 is changed due to the difference in the key pressing force of the key 5. Since it is possible to generate musical tones having different tone colors according to the difference in the size of, the musical tones having different tone colors can be generated according to the performance intention of the player.

Next, FIG. 6 is a sectional view showing another embodiment of the present invention. In this embodiment, the same components as those in the above-described embodiment are designated by the same reference numerals.

In the embodiment described above, the hammer arm 21
Although the ON / OFF type third switch SW3 is used as the pressing force detection means associated with the turning force of the above, in this embodiment, the braking member 29 and the muffling member 3 are used as the pressing force detection means.
The pressure sensor AS provided between 0 and 0 is used.

With such a configuration, not only the same effects as in the case of the above-described embodiment can be obtained, but also
Even when the key 5 is pressed at the same key pressing speed, the pressure sensor AS detects the difference in the turning force of the hammer arm 21 due to the difference in the key pressing force of the key 5. Since it can be detected as a continuous difference in voltage value, a musical tone is generated with a subtle tone color corresponding to the slight difference in continuous voltage value (corresponding digital signal value). Is possible.

In this embodiment, the hammer arm 2
It is possible to generate musical tones having different tones according to the difference in the magnitude of the turning power of 1. For example, a hammer arm 2
It may be possible to generate musical tones having different sound volumes and effects (effectors) according to the difference in the magnitude of the turning force.

[0025]

As is apparent from the above description, according to the present invention, the key pressing speed of the key rotatably provided on the keyboard chassis is detected by the key pressing speed detecting means, and It is rotated in response to a key pressing operation of the key, and is accompanied by rotation of a hammer arm rotatably provided on the keyboard chassis in order to give a touch feeling to the key. When the pressing force is detected by the pressing force detecting means, based on the pressing force of the hammer arm detected by the pressing force detecting means and the key pressing speed detected by the key pressing speed detecting means,
Since the characteristics of the generated musical tones are controlled, even if the keys are pressed at the same key pressing speed, the hammer arm turns due to the difference in the key pressing force. Musical sounds can be generated with characteristics according to the difference in power level.

[Brief description of drawings]

FIG. 1 is a sectional view showing a keyboard device according to an embodiment of the present invention.

FIG. 2 is an overall block diagram showing an electronic circuit configuration used in the keyboard device shown in FIG.

FIG. 3 is a main CPU 200 when a key 5 is pressed.
It is a figure which shows the operation | movement flow chart of FIG.

FIG. 4 is a diagram showing a relationship between key pressing speed information, a switch state of a third switch, and an output volume.

FIG. 5A is a diagram showing a musical score when a key is played weakly and quickly. (B) is a diagram showing a musical score when a key is powerfully and slowly played.

FIG. 6 is a sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 2 keyboard chassis 5 keys 21 hammer arm SW1 1st switch SW2 2nd switch SW3 3rd switch AS for detecting pressing force AS pressure sensor

Claims (3)

[Claims] 1. A key rotatably provided on a keyboard chassis, a key pressing speed detecting means for detecting a key pressing speed of the key, and a key being rotated according to a key pressing operation, A hammer arm rotatably provided on the keyboard chassis for giving a key touch feeling to the key, and a hammer arm accompanying the rotation of the hammer arm. A pressing force detecting means for detecting the pressing force of, and a pressing force detected by the pressing force detecting means and a key pressing speed detected by the key pressing speed detecting means,
A keyboard device comprising: a control unit for controlling characteristics of a generated musical sound. 2. The keyboard device according to claim 1, wherein the pressing force detecting means is a switch that is turned on and off according to the pressing force. 3. The keyboard device according to claim 1, wherein the pressing force detecting means is a pressure sensor that outputs a corresponding voltage value according to the pressing force.