JPH07210164A - Touch responce device for electronic keyboard instrument - Google Patents

Abstract

PURPOSE:To accurately and clearly detect a touch response signal for a white key with a large change width. CONSTITUTION:Black key sensors 3a, 3b are arrayed on respective positions of a sensor board 1 corresponding to the lower faces of free end parts 5a of respective black keys 5 and white key sensors 2a, 2b are arrayed on positions corresponding to the lower faces of wide parts 4a of respective white keys 4 so as to be shifted from the sensors 3a, 3b in the longitudinal and width directions of the keys. When touch vibrato is executed after depressing a white key 4, the sensors 2a, 2b are depressed by an actuator part 4b formed on the rear end part of the wide part 4a and touch response signals to be changed with a large change width in a reverse phase are outputted from both sensors 2a, 2b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a touch response device for a keyboard electronic musical instrument such as an electronic organ, an electronic piano, etc., and in particular, performs an after-touch control for controlling a generated tone by key operation after each key depression. Touch response device for.

[0002]

2. Description of the Related Art In a keyboard electronic musical instrument, in order to add musical expressiveness to a musical tone generated by a conventional key depression, an initial touch control for detecting an envelope of the musical tone generated by detecting a key depression speed. Controls and after-touch controls that detect the change in pressure applied to the key after pressing the key and control the volume, pitch, tone color, etc. of the musical tone are implemented.

As a touch response device for performing the after-touch control, for example, as shown in FIG. 9 (a), a large number of pressure sensitive sensors 22 and 23 are provided on a long sensor substrate 20. One arranged in a row along the direction, and a large number of white keys 4 and black keys 5 arranged on the fixed portion of the keyboard device, which are rotatably arranged in a row, as shown in (b). is there.

That is, white keys (C, D, E, F, G,
A pair of white key sensors 22a and 22b that generate a touch response signal by being pressed by an actuator portion 4d provided in the narrow portion 4c of the A and B sound keys 4 and a black key (C #, A pair of black key sensors 23a and 23b that generate a touch response signal by being pressed by the vicinity of the free end 5a of the D #, F #, G #, and A # keys 5).
In each case, they are arranged in a line on a straight line passing near the free end 5a of each black key 5 so as to correspond to the lower surface of each key.

[0005]

However, in such a conventional touch response device, the white key sensor 2 is used.
2 (22a, 22b) is the black key sensor 23 (23a, 2)
3b), the pair of sensors 22a and 22b are pressed by the narrow portion 4c of the white key 4, and the sensor 22a, 22b is placed on either side of the wide portion 4a pressed by the player's finger. Some keys were biased, and variations occurred for each key, and changes in pressing force due to key operation could not be accurately detected as sensor output.

Further, since the distance between the pair of pressure-sensitive sensors 22a and 22b is narrow, the width of change in the outputs of the left and right sensors when touch vibrato is applied is small. Therefore, a large amplifying circuit is required thereafter, and There was a problem that it was difficult to distinguish it from noise, and it was difficult to detect it accurately. The present invention has been made in view of such a problem, and an object thereof is to enable a touch response signal of a white key to be detected accurately and clearly (with a large change width).

[0007]

According to the present invention, a white key is pressed by a white key to generate a touch response signal on a fixed portion of a keyboard device in which a large number of white keys and black keys are rotatably arranged in a row. In a touch response device of a keyboard electronic musical instrument provided with a key sensor and a black key sensor that generates a touch response signal when pressed by the black key, in order to achieve the above object, the black key sensor is provided for each black key. Are arranged in a row corresponding to the lower surface of the free end portion of the white key, and the white key sensor is displaced in the longitudinal direction and width direction of the key with respect to the black key sensor to correspond to the lower surface of the wide portion of each white key. They are arranged in a row.

As the black key sensor and the white key sensor, it is preferable to use a pair of pressure-sensitive sensors or a sensor having a pressure-sensitive portion which are separated from each other in the width direction of the key. Further, it is desirable that the white key sensors are arranged in a row at a position corresponding to the lower surface of the wide portion that is closest to the fulcrum of rotation of each white key. Alternatively,
As a white key sensor and a black key sensor, a first pressure-sensitive sensor that detects the pressing force of each key independently from the left and right of each key, and a second pressure sensor that detects the pressing force as one output. A pressure sensor may be provided.

[0009]

In the touch response device for a keyboard electronic musical instrument according to the present invention, the white key sensor that is pressed by the white key to generate the touch response signal is pressed by the lower surface of the wide portion of each white key. It will not be biased to the left or right. Therefore, the change in the pressing force due to the key operation can be accurately detected as the sensor output.

Further, since the interval between the pressure-sensitive sensors or the pressure-sensitive parts of each pair of white keys can be widened, the output change width of the left and right pressure-sensitive sensors or the pressure-sensitive parts becomes large when touch vibrato is applied, After that, a large amplification circuit is no longer needed,
Accurate detection is possible because the distinction from noise becomes clear.
Further, different after-touch control can be performed for the generated musical tone by using the output of the first pressure-sensitive sensor and the touch response output of the second pressure-sensitive sensor for each key.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 2 is a top view showing one octave of a sensor substrate in a touch response device for a keyboard electronic musical instrument according to the present invention. FIG. FIG.

As shown in FIGS. 1 and 2, on the long sensor substrate 1 of this embodiment, there are two white-sensitive sensors 2a, which are pressure-sensitive sensors forming a pair for each key. 2b and the black key sensors 3a, 3b are formed in two rows along the longitudinal direction of the sensor substrate 1, and the white key sensors 2a, 2b are used as the black key sensors 3a.
The position is displaced in the width direction and the longitudinal direction of the sensor substrate 1 with respect to a and 3b.

In FIG. 2, the note names (C, C #, D, D #, ...) Of the keys are located at positions corresponding to the centers of the keys in the width direction.
... B, C) are described. Then, the sensor board 1 is fixed along the arrangement direction of each key on the keyboard frame 10 shown by imaginary lines in FIG. 3, which is the fixing portion of the keyboard device.

As a result, as shown in FIG. 1, each pair of black key sensors 3a and 3b is connected to the free end (tip) of each black key 5.
Each pair of white key sensors 2 is provided at a position corresponding to the lower surface of 5a.
a and 2b are arranged at positions corresponding to the lower surface near the rear end of the wide portion 4a of each white key 4, respectively. 4b is an actuator provided at the rear end of the wide portion 4a of the white key 4, and 5b is an actuator provided inside the free end 5a of the black key 5.

Reference numeral 6 denotes a printed wiring which is a lead-out line from each pressure-sensitive sensor 2a, 2b, 3a, 3b formed on the sensor substrate 1, and through a through-hole 7 and a printed wiring (not shown) formed on the back surface. , Each pressure sensor 2a, 2
b, 3a, 3b are connected to each terminal of the terminal portion 8.

On the sensor substrate 1, as shown in FIG. 3, an elongated sensor assembly 17 including the sensor substrate 1 is actually constructed. That is, on the sensor substrate 1 fixed on the keyboard frame 10, the pressure-sensitive resistance contact 13 such as pressure-sensitive ink is provided on one of the facing surfaces of the two insulating sensor films 11 and 12, and the carbon film is provided on the other. The conductive contacts 14 are printed and formed in an elliptical shape or an elliptical shape with the major axis oriented in the key width direction, and the conductive contacts 14 are arranged so that the white key sensor 2 (2a, 2b) and the black key sensor 3 ( 3a,
3b) is formed.

Furthermore, a rubber pad 15 made of silicon rubber or the like having pressing projections formed at positions corresponding to the sensors 2 and 3, and a felt pad 16 also serving as a cushioning material as a lower limit stopper for each key. And stack and glue.
In FIG. 3, reference numeral 18 is an upper limit stopper such as a felt common to all keys, and 19 is a key guide.

When the white key 4 is pressed, the felt pad 16 and the rubber pad 15 are moved by the lower surface of the actuator portion 4b provided near the rear end of the wide portion 4a.
The white key sensor 2 is pressed via, and the resistance value of the pressure-sensitive resistance contact 13 changes according to the pressing force. Similarly, by pressing the black key 5, the free end 5a and the actuator 5
By b, the black key sensor 3 is pressed through the felt pad 16 and the rubber pad 15, and the resistance value of the pressure-sensitive resistance contact 13 changes according to the pressing force.

Therefore, by scanning each of the sensors 2 and 3 from the terminal portion 8 of the sensor substrate 1 of the sensor assembly 17 shown in FIG. 2 by a scan circuit (not shown), the resistance value of the pressure-sensitive resistance contact 13 is changed. A touch response signal corresponding to the change is detected, and a tone generated by the tone generator circuit is modulated for the key according to the output signal difference between the left and right white key sensors 2a and 2b and the black key sensors 3a and 3b. After that, touch vibrato can be applied, and after-touch control can be performed by controlling the volume and timbre according to the sum of both output signals.

In the touch response device of this embodiment, the white key sensors 2a and 2b are provided with the wide portion 4a of each white key 4.
Since it is pressed by the lower surface of the key, the pressed position becomes close to the normal key pressing position by the player's finger, and it is not biased to the left or right of the white key. Therefore, the change in the pressing force due to the key operation can be accurately detected.

Further, since the interval between the white key sensors 2a and 2b, which are the pressure-sensitive sensors of each pair of the white keys 4, can be widened, the width of the output change of the left and right sensors 2a and 2b when touch vibrato is applied is wide. It becomes large, and after that, a large amplification circuit becomes unnecessary, and the distinction from noise becomes clear.

Differences in touch response output waveforms of the pair of white key sensors of this embodiment and the conventional touch response device will be shown in comparison with FIGS. 4, 5 and 6. In both figures, (a) shows the touch response output waveforms from the white key sensors 2a, 2b of this embodiment, and (b) shows the white key sensors 22a, 22b of the conventional touch response device shown in FIG. The touch response output waveform by is shown. The horizontal axis of each figure is time, and the vertical scale line is drawn every 0.5 seconds. The vertical axis is the output voltage, and the horizontal scale line is drawn for each 0.25V.

FIG. 4 is an output waveform when the touch key is applied relatively quickly to the white key 4 while increasing the pressure, and FIG. 5 is an output waveform when the touch key is applied slowly while increasing the pressure, and FIG. This is an output waveform when a touch vibrato is applied with a constant pressing force.

In any of these cases, the touch response output waveforms from the white key sensors 2a and 2b of this embodiment have a sufficiently large output variation range of the left and right sensors 2a and 2b, and the variation phase thereof. Since the phases are opposite to each other, the output difference between the two sensors 2a and 2b is also equal to that of the conventional white key sensor 22a
It can be seen that it is significantly larger than the case of 22b.

Although the black key sensors 3a and 3b have the same arrangement as the conventional one, the arrangement relationship of the sensors for each black key is the same, and there is no deviation or variation due to the keys. Since the sensors 3a and 3b are pressed at a position close to directly below the key pressing position, a sufficient output and an output difference between the left and right sensors can be obtained.

Further, in this embodiment, the white key sensors 2a, 2a are located at the position closest to the key rotation fulcrum of the wide portion 4a of each white key 4.
Since 2b is pressed, more accurate and sufficient output can be obtained from the principle of leverage. Furthermore, this white key sensor 2
By forming a and 2b and the black key sensor in a zigzag pattern on one substrate, it is possible to accurately detect the after-touch of both the white key and the black key, and to provide a small touch response detection device. it can.

Next, another embodiment of the present invention will be described with reference to FIG. 7A shows an arrangement state of the pressure-sensitive sensors on the sensor substrate, and FIG.
And the corresponding relationship with the black key 5. In this figure, parts corresponding to those in FIGS. 1 and 2 are designated by the same reference numerals, and their description will be omitted.

In this embodiment, the white key sensor 2 is provided on the sensor substrate 1 at the same position for each white key 4 as in the previous embodiment.
a and 2b, and a pair of black key sensors 3a and 3b
Is slightly shifted to the fulcrum side of the black key 5 as compared with the above embodiment. Then, a second white key sensor 2c is formed adjacent to the rear portion of the white key sensor 2a in an oval shape having a length that is the full width of the narrow portion 4c of the white key 4, When it is pressed by the actuator unit 4d, the pressure-sensitive unit detects the pressing force as one output and outputs a touch response signal.

The white key sensor 2b and the black key sensor 3 are also provided.
A second black key sensor 3c is formed between a and 3b in the shape of an ellipse having a full width of the black key 5, and the free end 5a of the black key 4 is formed.
When it is pressed by, the pressure-sensitive portion detects the pressing force as one output and outputs a touch response signal. The generated tone can also be after-controlled by the touch response signal output according to the after-touch of each of the white key 4 and the black key 5.

According to this embodiment, in addition to the same effects as the above-mentioned embodiments, a pair of left and right pressure-sensitive sensors 3 is provided for each key.
a, 3b and each output of one pressure sensitive sensor 3c across the key width,
Alternatively, various parameters of the musical tone can be controlled separately by the difference and sum signals thereof. Also, a large output can be obtained as an addition signal.

Next, another embodiment of the present invention will be described with reference to FIG.
Explained by. 8A shows the arrangement state of the pressure-sensitive sensors on the sensor substrate, and FIG. 8B shows a partly enlarged view of the correspondence relationship with the white keys 4 and the black keys 5. In this figure as well, portions corresponding to those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted.

In this embodiment, instead of the pair of white key sensors 2a, 2b in the embodiment described with reference to FIGS. 1 to 3, an oval white having the width of the wide portion 4a of the white key is used. In place of the black key sensors 3a and 3b, the key sensors 32 are formed with oval black key sensors 33 each having the full width of the black key 5 on the sensor substrate 1. Each of the white key sensor 32 and the black key sensor 33 has a pressure sensitive portion, and can detect the after-touch of each key with high sensitivity and accuracy as in the above-described embodiment.

If the white key sensor 32 and the black key sensor 33 are provided with a pair of pressure sensitive portions near both ends in the longitudinal direction, a pressing force of each key is used. Can be detected separately on the left and right sides thereof, which is suitable for applying touch vibrato as in the first embodiment.

In each of the above-described embodiments, since the pressure sensor has an elliptical shape or an oval shape, the area of the sensor substrate 1 where the pressure sensor is not disposed can be increased. Since the bonding areas of the sensor films 11, 12, the rubber pad 15, and the felt pad 16 are increased, the bonding strength can be increased. Further, it becomes easy to provide a space for providing a screw hole for attaching the sensor assembly 17 to the keyboard frame 10 and forming a printed wiring.

[0035]

As described above, the touch response device according to the present invention can accurately and clearly detect the touch response signal of the white key (with a large change width), and accurately change the pressing force to change the musical tone. Can be reflected in. In particular, touch vibrato can be effectively added.

[Brief description of drawings]

FIG. 1 is an enlarged top view showing a positional relationship between a white key and a black key by enlarging a part of the sensor substrate shown in FIG.

FIG. 2 is a top view showing one octave of a sensor substrate in an embodiment of a touch response device for a keyboard electronic musical instrument according to the present invention.

FIG. 3 is an enlarged vertical sectional view taken along line XX in FIG.

FIG. 4 is an output waveform diagram of a pair of white key sensors according to the embodiment of the present invention and the conventional example shown in FIG. 9 when the touch blunt is applied relatively quickly while increasing the pressure applied to the white key.

FIG. 5 is a similar output waveform diagram when the touch blunt is slowly applied while increasing the pressing force.

FIG. 6 is an output waveform when a touch vibrato is applied with the pressing force kept constant.

FIG. 7 is a top view showing an arrangement state of pressure-sensitive sensors on a sensor substrate and a correspondence relationship between white keys and black keys according to another embodiment of the present invention.

FIG. 8 is a top view showing an arrangement state of pressure-sensitive sensors on a sensor substrate and a correspondence relationship between white keys and black keys according to still another embodiment of the present invention.

FIG. 9 is a top view showing an arrangement state of pressure-sensitive sensors on a sensor substrate and a correspondence relationship with a white key and a black key, showing an example of a touch response device of a conventional electronic keyboard instrument.

[Explanation of symbols]

1 ... Sensor substrate, 2, 2a, 2b, 2c, 32 ... White key sensor, 3, 3a, 3b, 3c, 33 ... Black key sensor,
4 ... White key, 5 ... Black key, 8 ... Terminal part, 10 ... Keyboard frame, 11, 12 ... Sensor film, 13 ... Pressure-sensitive resistance contact, 14 ... Conductive contact, 15 ... Rubber pad, 16 ... Felt pad

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuro Haruyama 10-1 Nakazawa-machi, Hamamatsu-shi, Shizuoka Yamaha stock company (72) Inventor Yasuhiro Hinako 10-1 Nakazawa-machi, Hamamatsu-shi, Shizuoka Yamaha stock company

Claims (4)

[Claims] 1. A white key sensor and a black key which are pressed by the white key to generate a touch response signal on a fixed portion of a keyboard device in which a large number of white keys and black keys are rotatably arranged in a row. In a touch response device for a keyboard electronic musical instrument provided with a black key sensor that generates a touch response signal by being pressed by, the black key sensors are arranged in a row corresponding to the lower surface of the free end of each black key. The keyboard is characterized in that the white key sensors are arranged in a row corresponding to the lower surface of the wide portion of each white key by shifting the position in the longitudinal direction and the width direction of the key with respect to the black key sensor. Touch response device for electronic musical instruments. 2. The black key sensor and the white key sensor,
A touch response device for a keyboard electronic musical instrument, comprising a pair of pressure-sensitive sensors or pressure-sensitive portions that are separated from each other in the width direction of the key. 3. A touch response device for a keyboard electronic musical instrument, wherein the white-key sensors are arranged in a row at a position corresponding to a lower surface of a wide portion that is closest to a rotation fulcrum of each white key. 4. A white pressure sensor and a black key sensor, a first pressure-sensitive sensor that detects the pressing force of each key independently from the left and right of each key, and the pressing force that is detected as one output. A touch response device for a keyboard electronic musical instrument, comprising: