KR0120526Y1 - Electronic piano - Google Patents

Abstract

The present invention relates to a keyboard touch recognition device for an electronic keyboard musical instrument. In particular, a magnetic core (7 ₁ -7 _{N) which} causes the inductance of a coil to change according to the amount of presses of the keyboard (1 ₁ -1 _N ) in an existing electronic keyboard musical instrument. )Wow; A cylindrical coil 8 _{1-8 N} whose inductance changes in correspondence with the insertion depth of the core due to the key being pressed; An oscillator (9 ₁ -9 _N) is the oscillation frequency varies depending on the inductance of the coil; By adding a counter (10 ₁ -10 _N ) which counts the oscillation frequencies of the oscillator and calculates the change amount of the touch speed of the keyboard versus the oscillation frequency in the microcomputer (2), the touch of the keyboard when performing the performance through the electronic keyboard musical instrument By allowing the senses to have the same feel as the keyboard touch on a normal piano, the reliability of the product can be greatly improved.

Description

Keyboard Touch Recognition Device for Electronic Keyboard Instruments

1 is a block diagram of a keyboard touch recognition device of the present invention.

(A)-(d) of FIG. 2 is a side view which shows the relationship between a core and a cylindrical coil according to the amount of pressed keys.

3 is a dynamic characteristic graph showing changes in keyboard touch speed (time) versus oscillation frequency when playing the piano.

4 is a graph showing characteristics of keyboard touch speed versus oscillation frequency when playing a trill.

* Explanation of symbols for main parts of the drawings

1 ₁ -1 _N : Key 2: Microcomputer

3: memory 4: clock generator

5: output interface section 6: sound signal generating section

7 ₁ -7 _N : Magnetic core 8 _{1-8 N} : Cylindrical coil

9 ₁ -91 _N : Oscillator 10 ₁ -10 _N : Counter

The present invention relates to a keyboard touch recognition device for an electronic keyboard musical instrument designed to feel the same keyboard touch as when playing a general piano when performing an electronic organ, digital piano, or siren piano. will be.

In general, the keyboard touch method of the piano is different depending on the skill and skill of the player, and also varies depending on the conditions required for musical scores, so there are various touch methods.

Therefore, in order to obtain the same effect as the keyboard touch characteristics of a general piano through an electronic keyboard instrument, an available method is required. In a conventional electronic keyboard instrument, an optical method, a mechanical method by a switch, and a piezoelectric element are used. The method used has been adopted.

However, in the case of adopting the optical method described above, in order to fully utilize the characteristics of the keyboard touch, it is not only technically difficult but also disadvantages in that the production cost of the product increases. Since tension should be added, there was a problem that the player felt resistance from the fingertips when playing the keyboard musical instrument.

An object of the present invention is to provide a keyboard touch recognition device for an electronic keyboard musical instrument that can have the same touch sense of a keyboard when performing a performance through an electronic keyboard musical instrument.

Another object of the present invention is to improve the touch sense of the keyboard through the addition of relatively simple technical means (ie, cores, coils, oscillators and counters), which can prevent product cost increase and improve the reliability of the product. The present invention provides a keyboard touch recognition apparatus for an electronic keyboard musical instrument.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As the device of the present invention is shown in Fig. 1, a key that is rotatably installed on the plate plate 11 at a number corresponding to the musical scales in the octave and whose pressed state is detected by an optical and switch contact method or the like ( 1 ₁ -1 _N ); A microcomputer 2 for performing an overall control function of the electronic keyboard musical instrument by performing a predetermined program; A memory 3 in which various programs and data are stored; A clock generator (4) for generating a driving pulse to the microcomputer (2); An output interface unit 5 for outputting a predetermined control signal output from the microcomputer 2 to the sound signal generator 6; In the electronic keyboard musical instrument driving apparatus having an acoustic signal generator (6) for generating an acoustic signal corresponding to the scale of the key pressed and respectively triggered by the signal output from the output interface (5), the keyboard ₍₁ 1 -1 _N) are installed in each direction perpendicular to the bottom surface of the magnetic core (7 ₁ -7 _N) to cause a change in inductance of the coil (8 ₁ -8 _N) in accordance with the depression amount of each key and; Each key is installed on the upper surface of the plate board _{(11) (1 1 -1 N} ) is depressed cylindrical their inductance is changed in response to the insertion depth of the coil of the magnetic core (7 ₁ -7 _N) according to the load ₍₈₁ -8 _N ); The cylindrical coils (8 ₁ -8 _N) number of the oscillator (9 ₁ -9 _N) is the oscillation frequency is changed according to the respective values of inductance and; It consists of several counters (10 ₁ -10 _N ) which allow the microcomputer (2) to calculate the change amount of the oscillation frequency versus the touch speed of the keyboard by counting the oscillation frequencies output from the oscillator (9 ₁ -9 _N ), respectively. It is characterized by.

Referring to the effects of the device of the present invention configured as described above with reference to (a)-(d) to FIG. 4 of FIG.

First, the keyboard (1 ₁ -1 _N ) of the electronic keyboard musical instrument is provided with a return spring with the rear end axially held on the instrument body. When the upper surface of each key is pressed and released, it is rotated downward within a predetermined angle range. Repeats the operation of restoring

The keyboard ₍₁ 1 -1 _N) magnetic body cores (7 ₁ -7 _N) of the rod-like, which is installed as part of the means for detecting the touch of the, but may be attached with adhesive such as the bottom of the keyboard, in this way by using an adhesive material If attached, the adhesive force may be weakened and degraded when used for a long period of time. Therefore, ribs are formed on the bottom of the keyboards (1 ₁ -1 _N ), so that _one end of the magnetic core (7 1-7 _N ) is inserted into the ribs and the periphery thereof. Applying adhesive on the plate will give a more perfect fixation.

In addition, the keyboard ₍₁ 1 -1 _N) of the magnetic core (7 ₁ -7 _N), the respective bottom of the installation there is a cylindrical coil (8 ₁ -8 _N), wherein said cylindrical coil _(81-8 provided in _On the plate plate 11 to which _N ) is fixed, at least holes having a diameter corresponding to the through holes of the coils 8 _{1-8 N} may be drilled.

That is, when drilling a hole in the plate board 11, the keyboard ₍₁ 1 -1 _N) have coils (8 ₁ -8 _N) end of the magnetic core (7 ₁ -7 _N) provided in its bottom part is pressed when the so passing through the hole in the plate through hole and the plate 11 is capable of preventing breakage of the magnetic core (7 ₁ -7 _N) due to the plate buditchim plate in advance.

Such a cylindrical coil (8 ₁ -8 _N) are, respectively, the oscillator (9 ₁ -9 _N) and counters (10 ₁ -10 _N) meurosseo state connects to the microcomputer (2) through, the keyboard ₍₁ 1 -1 _N) Depth and speed according to the touch of the microcomputer 2 can be calculated.

That is, the number of the keys ₍₁ 1 -1 _N) one part of a key are inserted in the magnetic core (7 ₁ -7 _N) to the cylindrical core (7 ₁ -7 _N) is pressed at a predetermined speed, provided at their bottom since the inductance of the coil (8 ₁ -8 _N) cores oscillator (9 ₁ -9 _N) are connected to the coils (8 ₁ -8 _N) is increased as the depth of insertion corresponds to (7 ₁ -7 _N) Is lowered in inverse proportion to inductance values, respectively.

On the other hand, to give input to the oscillator (9 ₁ -9 _N), the microcomputer (2) by counting the oscillating frequency outputted from each oscillator, the output terminal counters (10 ₁ -10 _N) is connected to the input terminal of the microcomputer, so In (2), it is possible to calculate the touch pattern of the keys (1 ₁ -1 _N ), that is, the touch speed and depth, by changing the oscillation frequency according to the change of time.

In this way, the microcomputer 2 that calculates which key is touched in which pattern generates a predetermined trigger signal to the acoustic signal generator 6 through the output interface 5, and thus the acoustic signal generator 6 Outputs a sound signal corresponding to the sound example corresponding to the pressed speed of the keyboard.

At this time, in order to faithfully recognize the touch state of the keys (1 _{1-1 N} ), a detection operation must be performed at a high speed (mS unit), and when the keys are pressed, the counter 10 _{1-10 N} has a short period. By performing the counting, it is possible to precisely recognize the change in frequency according to the depth and speed of each moment when the key is pressed, so that it can cope with any type of sound output required.

A second-degree (a) - (d) is intended only to show the extent of the piano key-press yeonjusi through the electronic keyboard musical instrument, because the support key is pressed as shown in (a) a core (7 ₁ -7 _N) and the coils ₍₈₁ - When 8 _N ) is separated from each other, the inductance of the coil is small so that the oscillator oscillates at the highest frequency in the oscillator (9 ₁ -9 _N ), and when pressed slightly as shown in (b), the coil (8 ₁ -8 _N ) being the inductance is increased a little lower the output frequency of the oscillator (9 ₁ -9 _N) bit, (c) Kanban the inductance is increased a lot of coils (8 ₁ -8 _N) when pressed to a depth as the oscillator ₍₉₁ The output frequency of -9 _N ) is much lowered, and when pressed to the end as in (d), the inductance of the coil (8 _{1-8 N} ) is increased to the maximum, and the output frequency of the oscillator (9 ₁ -9 _N ) is reduced to the minimum. .

Fig. 3 is a dynamic characteristic graph showing the change in the keyboard touch speed (time) versus the oscillation frequency when playing the piano. A is the time when the predetermined key is hardened. Cursor The sound signal generator 6 outputs a sound signal of a scale corresponding to the corresponding key, but B represents a time when a predetermined key is gently pressed, and the time-zone frequency change value (Δf2 / Δt2) is very small. The sound signal generator 6 does not output the sound signal of the scale corresponding to the corresponding keyboard.

In other words, even when the same key is pressed, it is necessary to press the key more than a predetermined speed so that the time zone frequency change value Δf / Δt becomes a predetermined value or more, so that the acoustic signal of the per-row scale is output.

On the other hand, Figure 4 is a graph showing the change in the keyboard touch speed versus oscillation frequency during the trill playing the key repeatedly at high speed, ①, ②, ③, ④, ⑤, ⑥ are lower than the maximum frequency and minimum frequency Rather than being present in a large frequency band (that is, f1-f3), a touch is made within a short time, so that the time-zone frequency change value Δf / Δt becomes large, so that an acoustic signal for each key is output without exception.

Therefore, it can be seen that the keyboard touch sense of the electronic keyboard musical instrument to which the present invention is applied is the same as in a general piano.

As described above, according to the present invention, when the performance is performed through the electronic keyboard musical instrument, the touch sense of the keyboard may have the same feeling as the keyboard touch sense of a general piano, thereby greatly improving the reliability of the product. .

Claims (1)

Several keys 1 _{1-1 N} provided with numbers corresponding to musical scales in the male octave; A microcomputer 2 which performs an overall control function of the electronic keyboard musical instrument by a predetermined program; A memory 3 in which various programs and data are stored; A clock generator (4) for generating a driving pulse to the microcomputer (2); An output interface unit 5 for outputting a predetermined control signal output from the microcomputer 2 to the sound signal generator 6; In the electronic keyboard musical instrument driving apparatus having an acoustic signal generator (6) for generating an acoustic signal corresponding to the scale of the key pressed and respectively triggered by the signal output from the output interface (5), the keyboard ₍₁ 1 -1 _N) are installed in each direction perpendicular to the bottom surface of the magnetic core (7 ₁ -7 _N) to cause a change in inductance of the coil (8 ₁ -8 _N) in accordance with the depression amount of each key and; Each key is installed on the upper surface of the tube plate _{(11) (1 1 -1 N} ) is depressed cylindrical their inductance is changed in response to the insertion depth of the coil of the magnetic core (7 ₁ -7 _N) according to the load ₍₈₁ -8 _N ); The cylindrical coils (8 ₁ -8 _N) number of the oscillator (9 ₁ -9 _N) is the oscillation frequency is changed according to the respective values of inductance and; Characterized in that configured in the oscillator (9 ₁ -9 _N), the microcomputer (2) that calculates the touch speed variation of the oscillation frequency for the keyboard of counters (10 ₁ -10N) in the respective coefficient of the oscillation frequency output from the Keyboard touch recognition device of an electronic keyboard musical instrument.