JPH0348293A - Electronic musical instrument - Google Patents

Abstract

PURPOSE:To control a musical sound generated by the operation of an operation element faithfully by moving relatively a magnet and a coil opposite closely without contacting according to the operation of an operation element and generating a signal with the induced current of the coil. CONSTITUTION:The magnet 5d is provided at one side of either of a member which is associated with the operation element and a member which supports the operation element and the coil 8a is provided at the other side of it, and the magnet 5d and coil 8a move opposite relatively and closely without contacting each other according to the operation of the operation element to generate the signal with the induced current of the coil 8a. Then musical sound control parameters are varied in plural piece of steps according to the signal. Consequently, the emotional representation based upon how the player operates operation elements can faithfully be reflected on a generated musical sound.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an electronic musical instrument, such as an electronic organ or an electronic piano, which has an operator (keyboard key, etc.) for controlling musical sound.
In particular, it relates to a means for accurately making delicate operator operations based on the performer's emotional expression appear in the musical sounds. [Summary of the Invention] The present invention provides an electronic musical instrument having an operator for controlling musical tones, in which a magnet is disposed on one of the operator, a member that interlocks with the operator, and a member that supports the operator, and a coil is disposed on the other. The upper magnet and the coil move relatively close to each other in a non-contact manner in response to the operation of the operator, and generate a signal due to an induced current in the coil, and in response to the generated signal. By providing means for changing musical tone control parameters in a plurality of stages, it is possible to finely express complex emotions through the manner in which the performer touches the operator.

[Conventional technology]

In electronic musical instruments such as electronic organs and pianos, the sound production was basically controlled by opening and closing key switches by pressing keys, but this alone resulted in monotonous sound production characteristics.
Unlike the piano, it is not possible to perform a performance that expresses the performer's emotions.

Therefore, various technologies have been developed to provide a so-called touch response function in order to allow emotional expression by changing the pronunciation characteristics depending on the force applied when pressing a key. This touch response function responds to the movement of the performer's fingers at the onset of the key press and during the sustained state of the sound after the key press.
Touch control is used to control the volume, pitch, timbre, etc. of the musical sounds generated. Therefore, as seen in Japanese Utility Model Publication No. 57-31331, for example, a conductive elastic member is deformed in response to a key press, and a plurality of fixed contacts arranged in a row on a board are successively short-circuited to gradually change the resistance value. There is a device that changes the voltage and converts it into voltage and uses it as a touch response control signal.

Furthermore, as seen in Japanese Patent Application Laid-Open No. 58-18812, a rotary disk-shaped movable contact rotates when a key is pressed, and a digital signal generated by sequentially contacting a plurality of fixed contacts on a board is used to generate a musical performance. It is also thought that it may have an effect. [Problems to be Solved by the Invention] However, all of the touch response signals in these conventional techniques generate signals using contact type contacts, so it is generally difficult to perform stable operation, and moreover, the touch response signals are generated using contact type contacts. It is difficult to make the pitch too small, both from the point of view of contact formation and because the amount of wiring would be enormous, so fine-grained control is impossible.
The latter conventional example is particularly convenient for use in electronic musical instruments that generate musical tones through digital signal processing using microcomputers, which have become mainstream in recent years, since it is possible to provide a touch response using digital signals. However, the signal generation accuracy is still limited by the contact arrangement, and the number of output lines required is equal to the number of contacts. In addition, the structure was complex, which not only restricted the degree of freedom in design, but also caused problems in terms of durability. This invention solves these problems with conventional electronic musical instruments, and generates signals that change with high precision in a non-contact manner in response to the player's operation of the controls, thereby making it possible to faithfully control the musical tones generated. The purpose is to do so.

[Means to solve the problem]

In order to achieve the above object, the present invention provides an electronic musical instrument having an operator for controlling musical tones, in which a magnet is attached to one of the operator or a member interlocking with the operator and a member supporting the operator. A coil is disposed in the coil, so that the magnet and the coil move relatively close to each other in a non-contact manner in response to the operation of the operator, and a signal is generated in the coil by an induced current. The apparatus is equipped with means for changing musical tone control parameters in a plurality of stages according to the signal.

Further, the magnet in the above-mentioned electronic musical instrument is magnetized so that N poles and S poles appear alternately at a predetermined pitch over the entire stroke in the moving direction of the operator or a member interlocked therewith, and the coil is formed approximately parallel to the magnetization direction of the magnet, with a pitch approximately the same as that of its N and S poles, and the coil direction alternately changes over its entire stroke in accordance with the operation of the operator. It is preferable that a large number of pulse signals are generated by the current, and that the musical tone control parameters are changed in multiple stages corresponding to the number of generated pulses. Note that the term "operator" used in this specification refers not only to the white and black keys of a keyboard in a so-called keyboard electronic musical instrument, but also to push buttons, the treadle of an expression pedal device, the 21 lever, and the joystick. Also includes stake controls, etc. In addition, "musical tone control parameters" refer to volume, tone, pitch (
It includes all musical sound control parameters such as pitch), tempo, depth and speed of vibrato and tremolo.

[For production]

In the electronic musical instrument according to the present invention, when a musical tone control operator (key, etc.) such as a key is operated, the magnet and the coil move relatively close to each other without contacting each other according to the amount or speed of the operation. Then, a signal is generated in the coil due to the induced current.

Since the musical tone control parameters are changed in a plurality of stages according to this signal, it is possible to faithfully reflect the emotional expression of the player's operation of the operator in the generated musical tone.

Furthermore, over the entire stroke of the operator, a large number of pulse signals are generated depending on the operation amount or operation speed,
It is also possible to change the musical tone control parameter in multiple stages corresponding to the number of generated pulses.

In this way, the generated musical tones can be precisely controlled from initial control to after control, and digital signal processing by a microcomputer is also easy. [Example] Hereinafter, an example of the present invention will be described with reference to the accompanying drawings. First, in response to the operation of keys, which are operators for musical tone control,
Various embodiments will be described regarding means for generating a signal by induced current over the entire stroke.

1 to 12 are diagrams for explaining a first embodiment of the present invention.

In this embodiment, the present invention is applied to an electronic keyboard musical instrument having an inertial mass body, such as an electronic piano.

First, the keyboard device of this embodiment will be briefly explained using FIGS. 1 and 2.

In FIG. 1, a white key 1 and a black key 1' are shown as operators, but the black #11' differs from the white key 1 only in shape and color. Since the relationship with , etc. is the same, they are collectively referred to as Ill here.

II1 has a concave surface 1a with a cylindrical inner surface at its base end, and this concave surface 1a forms a cylindrical pin 3 fixed at the rear end of a slit 2a of a keyboard frame (hereinafter referred to as "r frame") 2.
It is slidably in contact with the

A cylindrical pin 4 is attached to the front end of the slit 2a of the frame 2.
is fixedly attached to this pin 4, and an interlocking member (hereinafter referred to as a "hammer" for convenience) consisting of a crank-shaped mass body (for example, iron) is attached to this pin 4.
A concave surface 5a having a cylindrical inner surface formed at the base end of the spring 5 slides freely in sliding contact, and a free end of a leaf spring 6 whose base end is fixed to the pin 3 is engaged with the rear end step 5b. The hammer 5 is biased in the right-handed direction as shown in FIG. 2, and the key 1 is also biased in the right-handed direction near the base end of the leaf spring 6, giving each of them a return habit.

The hammer 5 is provided with an engagement pressing portion 5c that engages with a recess 1b provided at the lower side of the key 1, and when the key 1 is pressed downward, the hammer 5 is also moved by the biasing force of the leaf spring 6. oscillates in the same direction against the

At this time, since there is a large difference in the distance from the engagement pressing part 5C of the key 1 and the hammer 5 to the pins 3 and 4 that are the respective fulcrums (that is, the hammer 5 has a larger distance between the engagement pressing part 5c and the fulcrum 4).
), a slight stroke of key 1 will cause
The stroke of the hammer 5 can be expanded several times, and a touch feeling similar to that of a piano can be obtained.

In this way, there is provided an operation amount expansion mechanism that expands the operation amount of the key 1 and moves the hammer 5.

Therefore, as shown in FIG.
Magnet pattern 5dt with poles alternately magnetized at a predetermined pitch
! In addition, on the lower surface of the frame 2, a resin frame 7 shaped by injection molding as shown in FIG. 4 is fixed, and each of the frames 7 is Small vR
The portion of the magnet pattern 5d of the hammer 5 is inserted into the inside of the hammer 7a with a slight gap between the both side walls.

When shaping the frame 7, a flexible substrate 8 having a plurality of conductive patterns 8a (for example, one octave of the hammer 5) as shown in FIG. 5 is placed in the mold.
After bending and fitting the conductive pattern 8a into a coiled state as shown in FIG. 6, resin is injected.

Then, the side wall surface 7 surrounding the slit 7a of the molded frame 7
Conductive patterns 8a as shown in Fig. 6 are arranged on the pins 7b, 7c, and 7d, and the conductive patterns 8a on both side walls 7b and 7d coincide with the radiation direction from the pin 4 of the frame 2 (Fig. 2). The conductive patterns on both sides u7b and 7d are shifted by one pitch of the magnet pattern 5d provided on the hammer 5, thereby forming a magnetic change detection means.

Here, to briefly explain the manufacturing method of the hammer 5, as shown in FIG.
, the base 5g is divided into three parts, each made of iron material, or a notch 5h as shown, for example, in the middle part 5f shown in FIG. After magnetizing both sides of the intermediate portion 5f in a layered manner, the resin layer 51 is outsert into the notch 5h. Similarly, resin is outserted on the ridges of the tip portion 5e and the base portion 5g, and they are assembled together as shown in FIG. This is to prevent the edges of the hammer 5 from coming into contact with the inner surface of the frame 7, but the thinner the resin layer is, the greater the change in the lines of magnetic force can be. Therefore, it is most desirable to eliminate this resin outsert and flatten the ridgeline portion of the hammer 5. Furthermore, in order to magnetize the middle part 5f of the hammer 5, as shown in FIG. Once the front side has been magnetized, the back side is similarly magnetized.

Thereby, rows of N and S poles can be formed on both the front and back surfaces of the intermediate portion 5f.

In addition, if the magnetic poles of the automatic magnetizer are respectively opposed to both sides of the intermediate portion 5f. It is possible to magnetize both the front and back sides at the same time. According to this embodiment, when the key 1 shown in FIGS. 1 and 2 swings downward with the center of the pin 3 as the fulcrum by pressing the key, the hammer 5 swings downward from the key 1 with the center of the pin 4 as the fulcrum. It swings downward at high speed, and the magnet pattern 5d passes across the conductive pattern 8a forming a coil.

At this time, a current flows through the conductive pattern 8a, and the relationship between the conductive pattern 8a and the magnet pattern 5d is schematically shown in FIG. 10 in a plan view, and its principle will be explained. When the magnet pattern 5d is in the state shown in the figure, the magnetic field directed from the north pole to the south pole causes the conductive pattern 8b to move as shown by arrows Y,
The current flows in the Y' direction, but the magnet pattern 5d is aligned with the arrow X.
When moving one pitch in the direction, the direction of the magnetic field is reversed, so the direction of the current is also reversed. Positive and negative pulses are obtained by this current change.

Since the conductive pattern 8a is formed by connecting the portions perpendicular to the moving direction of the magnet pattern 5d to form a repeating pattern, the pattern length becomes long and a large pulse can be generated in a small space. Now, assuming that the pattern length of the conductive pattern 8a is 4, the moving speed of the magnet pattern 8a is υ, and the magnetic flux density is B, the induced electromotive force E generated in the conductive pattern 8a can be expressed by the following equation.

E=27BM In this embodiment, the conductive pattern 8a is arranged on both sides of the magnet pattern 5d, but the principle is exactly the same as that shown in FIG. 10 above, and by increasing the pattern length of the conductive pattern 8a, It can be seen that an electromotive force is obtained. Although the number of pulses generated in this embodiment is inversely proportional to the pitch of the magnet pattern 5d, the magnetization pitch may not be able to be made very small due to the relationship with the magnetic flux density.

This problem can be solved by changing the shape of the conductive pattern. Figure 11 shows an example of the conductive pattern. This is done by changing the pitch of the magnetic pattern 5 at the center of one side of the conductive pattern 8c.
It is shifted by an amount equivalent to 1/2 of the pitch of d, and correspondingly, the other side is similarly shifted by 1/2 pitch. In this way, the conductive pattern 8c is connected to one of the magnet patterns 5d.
By shifting /2 pitch in the arrow X direction (vertical direction), the pitch of the magnetic field change that the part of the conductive pattern 8C perpendicular to the arrow X receives is halved, and for the same amount of movement of the magnet pattern 5d. twice as many pulses can be generated.

Alternatively, instead of changing the conductive pattern in this way, the conductive pattern remains as shown in FIG. A similar effect can be obtained by shifting the pitch by 1/2 pitch in the X direction (vertical direction). The number of pulses generated per unit time according to this embodiment is proportional to the key pressing speed, that is, the key pressing strength, so by changing the above-mentioned musical tone control parameters in multiple stages corresponding to this number of pulses, the player's It is possible to generate any desired musical tone. Next, a second embodiment of the present invention will be described with reference to FIG. 13.

This embodiment is an example in which the present invention is applied to an electronic keyboard musical instrument that does not have a hammer, such as an electronic organ. In the keyboard mechanism shown in FIG. 13, the key 11 is integrally molded from, for example, synthetic resin, and protrusions 1lb and llc are provided on the lower surface near the key pressing portion 11a, and protrusions 1lb and 1lc are provided on the lower surface of the longitudinally intermediate portion.
1d is provided with an engaging protrusion 11e at its base end, and an upper limit stopper 11f for the key 11 is formed at the lower part of the protrusion 11c, projecting rearward. Note that although the structure is shown when the key 11 is a white key, the black key 111
In the case of ', the structure is generally the same except that the key pressing portion does not extend toward the front but projects upward, so it is collectively referred to as the key 11 here.

On the other hand, a keyboard frame (hereinafter simply referred to as "r frame") 12, which is a key support member, is made of a magnetic material such as iron, and the key 11 is made of a magnetic material such as iron.
It has through holes i2a and 12b into which the engaging protrusion 11e and upper limit stopper 11f fit, respectively. Then, by fitting the engaging protrusion 11e of the key 11 into the through hole 12a and clamping the rear end rising part 12c of the frame 12 by the clip-shaped leaf spring 13, the key 11 is irremovably pivoted to the frame 12. It is now possible to rotate around the fulcrum C. Furthermore, this key 11 and frame 12
A leaf spring 14 engaged between the upper and lower ends of the frame 12 urges the key pressing portion 11a side of the key 11 upward, and the upper limit stopper 1lf is connected to a stopper 15 made of felt or the like affixed to the lower surface of the frame 12.
The upper limit position is set by contacting with. 16
is the lower limit stop flange that the protruding piece 11b comes into contact with when the key is pressed. Further, in this embodiment, a transmission type photo sensor 18 is disposed on the print board 19 corresponding to the protruding piece 11d of the 1111, and the protruding piece 11d blocks light from the light emitting part when a key is pressed. This makes it possible to detect the state of @11 (key pressed/released, etc.). And this #! A plate-shaped magnet block 2 is placed on the inner surface between the protrusion 11c and lld of 11.
0 hanging along the longitudinal direction of the key 11, flume 12
A frame 21 into which the magnet block 20 is inserted with a slight gap is fixedly installed above. Similarly to the magnet pattern 5d shown in FIG. 3, the fulcrum C is subdivided into fan shapes on both sides of the magnet block 20, and N and S poles are alternately magnetized in the vertical direction. ing. On the other hand, the inner surface of the frame 21 has the frame 7 in the above-described embodiment.
Similarly, a coil with a conductive pattern is connected to magnet block 2.
They are formed parallel to the magnetization direction of 0, with a pitch that is approximately the same as that of the north and south poles. According to this embodiment, the magnet block 20 is directly lowered in response to the key press operation of the key 11, and is moved relative to the conductive pattern (coil) in the frame 21 over its entire stroke, thereby reducing the conductivity. A large number of pulse signals are generated by induced currents that alternately change direction according to the pitch movement of the north and south poles in the pattern.

Similarly to the first embodiment described above, the musical tone control parameters can be changed in a plurality of stages corresponding to the number of generated pulses.

First, an embodiment in which the present invention is applied to a palm-held electronic musical instrument will be described.

FIG. 14 shows an example of a palm-held electronic musical instrument, in which a plurality of push button keys 61 corresponding to the index finger, middle finger, ring finger, and little finger are arranged on the top surface Boa of a triangular prism-shaped main body 60, and one side surface 60b.
is provided with l push-button keys 61 corresponding to the thumbs, and by pressing each of the push-button keys with a finger, musical tones of different pitches are generated.

By holding and operating a pair of palm-held electronic musical instruments with different ranges in both hands, a variety of performances are possible.

In such an electronic musical instrument, a cylindrical laminated magnet 62 with N poles and S poles arranged alternately at the same pitch on the outer peripheral surface as shown in FIG. 16 is placed on the bottom surface of the push button key 61, as shown in FIG. It is fitted into a case 63 made of resin so as to be slidable in the axial direction, and is biased by a spring 64 in the projecting direction. On the other hand, a coil 65 is fitted along the circumference in the center of the inner peripheral surface of the case 63, and a cushion 65 serving as a stopper is attached to the bottom surface.

Incidentally, the upper surface of the case 63 is formed into a conical shape so that the downward stroke of the push button key 61 can be increased.

With the above structure, when the push button key 61 is pressed against the spring 64, the laminated magnet 62 moves downward, and the magnetic flux around the coil 65 changes, so that an induced current in the coil 65 changes direction alternately. flows, and positive and negative pulses are obtained.

Note that this embodiment can also be applied to a general keyboard electronic musical instrument, so that when a key is pressed, a member corresponding to the push button key 61 is moved in conjunction with the push button key 61.

17 to 19 show a fourth embodiment in which the present invention is applied to an electronic musical instrument equipped with push-button keys, similar to the third embodiment.

In this embodiment, the lower part of the push button key 71 has an N pole and an S pole on the outer surface.
Two magnet plates 72, 72 with alternately magnetized poles are fixed so as to sandwich the center punch 73 integrated with the push button key 71, and the parts of the magnet plates 72, 72 can be inserted into the fixed part side. A printed circuit board 74 having a slit 74a is fixed.

On this printed circuit board 74, a coil 75 is printed on both the front and back surfaces of the printed circuit board 74, covering the slit 74a. A slit 77 corresponding to the slit 74a is inserted through the edge sheet 76 (see Fig. 37).
It is held between two yoke plates 77 made of a magnetic material with a. According to this embodiment, when the push button key 71 is pressed, the magnet plate 72 moves through the slit 74a of the printed circuit board 74, and the change in magnetic flux causes the coil 75 to generate a pulse due to an induced current. At this time, an edge effect due to the ridgeline portion 77b of the yoke plate 77 shown in FIG. 19 occurs, magnetic flux is concentrated, and the pulse current flowing through the coil 75 can be increased.

This embodiment can also be applied to general keyboard electronic musical instruments.

In each of the embodiments described so far, the operators for controlling musical tones were all keys of the keyboard device, but these operators are not limited to keys; for example, expressions, etc. It can also be applied to pedal devices. An example is shown in FIG.

There is an expression pedal device as a volume control mechanism for controlling the total level of an electronic musical instrument, and FIG. 20 is a partially cutaway side sectional view of the device. Reference numeral 93 denotes a support base, and reference numeral 94 denotes a step plate as an operator, which is rotatably supported on the support base 93 by the shaft portions of the support portions 94b and 94c around an axis AX, and both sides of the shaft portion of the support portion are provided with nuts AXa and It is supported by a bolt head. The tread plate 94 is made of plastic, and the metal base 94 is connected to the metal base 94 by tabs 94f (4 locations approximately at the four corners) protruding from the back surface of the tread plate 94.
It is crimped to a.

The metal base 94a has support portions 94b and 940 and a sliding tongue piece 94d formed by cutting and raising pieces at the middle part in the longitudinal direction.
is provided.

A through hole 94do is provided in the middle part of this tongue piece 94d so as not to impede the rotation of the footboard 93, and furthermore, three claw parts 94dl and 94d2 each formed of two claw pieces are provided at the tip end.
．． 94d3 is provided, and this pawl portion 94dt j 9
A pinion portion 94e as a rack and pinion mechanism and a tongue piece 94d are pressed together at 4dz + 94da. On the other hand, bosses 93bt, 93bz, and 95b3 as spacers are provided on the bottom surface 93a of the support base 93, and two guide members 95 having U-shaped grooves 95a are placed thereon by screws or the like (not shown). . The two guide members 95 are provided parallel to each other so that the grooves 95a face each other.

A rack part 96 is provided with sliding protrusions having a width slightly smaller than the groove width on both sides so as to slide into the groove 95a, and a sliding protrusion is connected to the rack part 96 by a connecting part 97. The attached slide plate 85 is slidably held.

When the rack part 96 and the slide plate 85 are held in the groove 95a, the teeth of the rack part 9 and the teeth of the pinion part 94e are held in mesh with each other.

Further, a fixed plate 86 is attached to a support base 93 on the lower side of the slide plate 85.
It is fixed to the bottom surface 93a of the holder via a boss. A magnet block 30 similar to the magnet block 20 in the second embodiment shown in FIG. 31 is permanently installed. In addition, N poles and S poles are formed alternately on the magnet block 30 at a predetermined pitch in the moving direction of the slide plate 85 in parallel to the vertical direction, and the inside of the frame 31 is formed in the same direction as the magnetic pole shape direction. A coil is formed with conductive patterns at approximately the same pitch as above.

In the expression pedal device having such a structure, when the left side in the figure is pressed down with the heel side of the foot, the tread plate 94 rotates in the direction of arrow A, and the pinion portion 9
4e is rotated clockwise (in the direction of arrow C), the rack portion 96 is moved to the left, and the slide plate 85 is also moved to the left. Therefore, the magnet unit 30
6 is inserted deeper into the frame 31 fixed to the frame 31.
An induced current flows through the conductive pattern inside the device, generating a large number of pulses.

When applying force to the heel side of the foot and rotating the treadle 94 in the direction of arrow B, the slide plate 85 moves to the right and the magnet unit 30 is pulled out from within the frame 31, but at this time as well. A pulse is generated. Depending on the number of pulses generated, the volume, etc. of the musical tones to be played can be adjusted in multiple stages.

Furthermore, since this embodiment employs a rack and pinion mechanism and a slide mechanism, an appropriate amount of friction can be obtained, making the pedal operation comfortable. Note that this expression pedal device is used in a manner similar to that described in, for example, Japanese Utility Model Application No. 152197/1983. That is, it is used independently of the main body of the musical instrument, and in some cases, it is used on an auxiliary stand.

As an application of this ninth embodiment, for example,
Of course, as described in No. 498, it may be an internal type installed inside the main body of the musical instrument.凰A1jiL RainbowΔ Next, a signal processing circuit for changing various tone control parameters using a large number of pulses generated when a key is pressed according to each of the above-described embodiments will be explained. First circuit example> Figure 21 is a block diagram showing the first circuit example. This circuit is roughly divided into a key operation pulse detection circuit 100,
It consists of a press ls (keying) detection circuit 110, a key press end detection circuit 120, a touch data type circuit 130, a multi-circuit 140, a musical tone signal generation circuit 150, and a sound system 160.

Of these circuits, the key operation pulse detection circuit 100, key press detection circuit 110, key press end detection circuit 120, and touch data formation circuit 130 are I! ! They are provided corresponding to each key on the board.

It goes without saying that the term "key" herein includes push-button keys, treadle boards, and the like as shown in the third and fifth embodiments described above.

The key operation pulse detection circuit 100 is a circuit that detects and shapes the pulse signal generated from the pulse generator PG provided for each key in the keyboard of each of the embodiments described above. As the part PG, one that generates pulses by magnetic means is used.

Therefore, the conductive pattern (
Coil) 8at 75, frame body 19, and an amplifier 101 that amplifies the pulse signal (current) generated in the coil L corresponding to the conductive pattern etc. formed within 8 days and converts it into a voltage signal, and differentiates the output. A waveform shaping circuit 10 outputs a key operation pulse CKI with the pulse width of a clock pulse CKO from a high-speed oscillation circuit 111, which will be described later.
It consists of 2.

The key press detection circuit 110 includes a high-speed oscillation circuit 111 that constantly oscillates, a counter 112 that counts high-speed clock pulses CKO generated thereby, a latch circuit 113 that latches the count value, and a counter 11
AND circuit G1, OR circuit G2, for generating the reset signal of 2 and the latch signal of the latch circuit 113,
G3, G4 and a D-type flip-flop circuit (hereinafter simply referred to as rFFJ) that serves as a delay circuit.
114, a preset position setting circuit 115 that manually sets a preset value P1 arbitrarily using the volume VRr, an 8 input that inputs the preset value P1, and an B input that inputs the count value latched to the latch circuit 113. and a comparator 116 which sets the output to 1 when A>H and generates a keying signal.

The key press end detection circuit 120 includes a preset value setting circuit 121 that manually sets a preset value P2 arbitrarily using a volume VR2, and a circuit A that inputs the preset value P2.
A comparator 122 that compares the input with the B input that inputs the count value latched to the latch circuit 113, and when A<H, sets the output to ゛1゜ and generates a key press end detection signal.
It consists of

The touch data forming circuit 130 includes a counter 131 that counts the key operation pulse CKI output from the key operation pulse detection circuit 100, a latch circuit 132 that latches and outputs the count value, and a reset signal for the counter 131 and a latch circuit. 1t3, a differentiator circuit 134, and an inverted output. It consists of a one-shot multivibrator (hereinafter abbreviated as "r/OS circuit") 135 and a changeover switch 136.

Note that /OS circuit 135 can be configured by a one-shot multivibrator and a NOT circuit that inverts its output.

Next, the operation of this circuit will be explained.

The preset values P1 and P2 are normally set to arbitrary values close to the full count value CMAI of the counter 112. (
For example, when CMAI=100, P1=90, P2=
95. ) Before the key press starts, the key operation pulse detection circuit 100 naturally
From then on, key operation pulse CK1 is not output. In the key press detection circuit 110, the counter 112 counts the clock pulse CKO from the high-speed oscillation circuit 111, and when it reaches the full count value CMAI, all the inputs of the AND circuit G1 become ゜1゛, so its output becomes ゛1゛. ,
Since it gives a latch signal to the latch circuit 113 via the OR circuit G3, the latch circuit 113 latches and outputs the full count value C11AI. Furthermore, when the output of the AND circuit G1 becomes ゜1゛, the output of the OR circuit G2 also becomes ゜1゜, and is delayed by one period of the clock pulse CKO by the FF 114, so that the reset signal that is the output of the OR circuit G2 becomes ゜. 1°, the counter 112 is reset and starts counting the clock pulses CKo from rQJ again.

Therefore, the output of the latch circuit 113 after that is always the full count value CMAI, which is larger than the preset value P1 by the preset value setting circuit 115, so the input of the comparator 116 becomes A<H, so its output becomes ゛O゜. ing.

On the other hand, since the output of the latch circuit 113 which is the B input of the comparator 122 of the key press end detection circuit 120 is larger than the preset value P2 which is the 8 input, A<H, so its output becomes 1 degree. Reset FF13B. As a result, the /Q (meaning inversion of Q) output of the FF 133 becomes 1°, and the counter 131 is reset and disabled.

When the selector switch 136 of the touch data forming circuit 130 is switched to the a side as shown in the figure, a latch signal is given to the latch circuit 132 when the output of the comparator 122 reaches 1°, but when the counter 131 is not counted, and its output is rQJ, so
Since "O" is latched, its output is also "O".

Also, when the output of the comparator 122 becomes ゜1゛,
The counter 112 is also reset. By resetting FF 133, its Q output becomes ゜O゜, so the comparator 122 becomes disabled, and FF 1 3'';
and cancels the reset of the counter 112. This state continues until the key is pressed, but when the key is pressed, a large number of key operation pulses CK are output from the key operation pulse detection circuit 1100.
1 is output sequentially. This key operation pulse CKI is generated in accordance with the amount of key operation movement, and the pulse interval T
(time) is inversely proportional to the displacement speed of the key, as shown in FIG.

This key operation pulse CKI is input to the counter 131 as a count pulse. A latch signal is given to the latch circuit 113 via the OR circuit G3, and the OR circuit G4 and FF
114 and the OR circuit G2, a reset signal is given to the counter 112. However, since the displacement speed of the key is slow at the beginning of the key press, the interval T between the key operation pulses CK1 is long, so that the count value CN of the counter 112 becomes the full count value C.
Even if MAI or smaller, it is latched by the latch circuit 113 after it becomes larger than the preset value P1, so the input of the comparator 116 still remains A<H and its output remains ゜O゛. FF135 also remains reset, and counter 131
remains disabled.

After that, when the displacement speed of the key becomes faster, counter 1
The next key operation pulse CKl is input while the count value CN of 12 is smaller than the preset value P1, and in order to cause the latch circuit 113 to latch the value, the comparator 116
The input becomes A>B and the output becomes ゜1゜. This rising edge becomes a key press signal or a keying signal.

As a result, the FF 133 is set and its /Q output becomes ``0'', and in order to release the reset of the counter 1, the counter 131 becomes enabled and starts counting the key operation pulse CKI. Also, FFI'! When i3 is set, its Q output becomes 1°, so the comparator 122 of the key press end detection circuit 120 is enabled.

Furthermore, at the rise of this Q output, the differential circuit 1134 outputs a differential pulse to trigger the /OS circuit 135, so the output changes from ゛l゜ to ゛0゛, and returns to ゛1゜ after a certain period of time. Therefore, if the selector switch 136 is switched to the b side, the latch circuit 132 latches the count value of the counter 131 at the rising edge of the output of the /OS circuit 135 and outputs it as touch data. That is, the touch data in this case is that the key press signal is generated as described above, and the counter 131 is generated by the key operation pulse CK.
This is the count value within a certain period of time after the start of counting I, and the faster the key displacement speed (key press speed), that is, the stronger the key touch, the larger the value becomes.

On the other hand, when the changeover switch 136 is switched to the a side as shown in the figure, the key press end detection circuit 12
When the output of the 0 comparator 122 rises from °O° to °l°, the latch circuit 132 latches the count value of the counter 131 and outputs it as touch data.

That is, when the key is pressed to the lower limit position or only halfway due to a weak touch, and the displacement speed of the key becomes extremely small, the interval T between the key operation pulses CKI becomes longer, and the counter 112 that the latch circuit 113 latches. Since the count value CN becomes larger than the preset value P2 of the key press end detection circuit 120, the comparator 122 changes the output to 1 degree. Therefore, the touch data in this case is stored in the counter 13.
1 is the count value from the start of counting the key operation pulse CKI until just before the key movement stops, and is a value corresponding to the depth of the key press. When the output of the comparator 122 reaches 1, the counter 112 is reset, and with a delay of the inversion time of the FF 133, the counter 131 is also reset and becomes disabled, and as mentioned above, the comparator 122 itself also becomes disabled. That's right.

Here, by setting the preset value P1 slightly smaller than the full count value CIIAI of the counter 112, it is possible to prevent touch data from becoming unstable or malfunctioning due to slight movement at the beginning of a key press or after a key press.

Furthermore, the preset values PL and P2 provide a dead zone at the beginning and end of the key press, and the width of each dead zone can be freely changed by varying these set values.

Here, the operation at the initial stage of key depression will be described in more detail. It is assumed that the changeover switch 136 is switched to the a side as shown in the figure. The time from when the counter 112 reaches the full count value C MAI and is reset to when the first key operation pulse CK1 is input is t.
The time taken for the count value CN to reach the preset value P1 is T1, and the time taken for the count value CN to reach the preset value P2 is Tz.
Assuming that (T1<Tz), the following three cases can be considered regarding the relationship between these timings.

(J) When t<T1, the latch circuit 113 latches the count value CN of the counter 112 while it is smaller than the preset value P1, so the comparator 116 outputs ゜1゜ since A>H. As a result, the first key operation pulse CKI may be counted because the FF 135 is set and the counter 131 is enabled.

At this time, of course t < T z, so the comparator 12
The output of No. 2 is 0.degree., and since the FF 133 is not reset and the latch circuit 132 does not perform a latch operation, its output remains at "0".

(2) When T1<t<T2, the latch circuit 113 latches the count value CN of the counter 112 after it becomes larger than the preset value P1, so the comparator 116 becomes A<H, so its output is ゜O゜The counter 131 remains disabled.

Since the output of the comparator 122 when A<H is also 0°, the latch circuit 132 also does not latch.

(3) When t>Tz, the output of the comparator 11th is ゛O゛, and the counter 131
remains disabled, and the input of the comparator 122 becomes A<B. However, since the Q output of the FF 133 is ゛0゜, it is in the disabled state, so the output remains ゜O゜, and the latch circuit 132 It also doesn't latch.

In this way, case (1) and (2), (3)
In this case, an error of "1" occurs in the count value of counter 1, but the number of pulses generated during one key press is 50 to 1.
If it is around 00, there will be little effect.

The circuit explained above is provided corresponding to each key.
The latch circuit 132 of each touch data type circuit 130
The touch data output from each of the touch data is input to a multi-circuit (multiplexer) 140, and is sent to a musical tone signal generation circuit 150 in a time-division manner from a common output line. The musical tone signal generation circuit 150 generates a musical tone signal with a pitch corresponding to the key to which the touch data is input, but the volume level (initial level, attack level, sustain level of the envelope waveform) level and time, etc.), timbre, pitch fluctuation, tempo,
Various musical tone control parameters, such as the depth and speed of vibrato or tremolo, can be changed in multiple stages, thereby generating a musical tone signal that faithfully responds to the player's emotion injected by the strength and depth of key presses. can be done.

The musical tone signal generated by this musical tone signal generation circuit 150 is supplied to a sound system 160 consisting of an amplifier 161, a speaker 162, etc., where it undergoes electro-acoustic conversion and generates a musical tone.

According to this embodiment, when the key pressing speed reaches a constant speed, press I! ! (keying) signal and counter 1
31 starts counting the key operation pulses CK1, and its constant speed can be changed arbitrarily by variably setting the preset value P1.

This means that the threshold level of the dead zone at the initial stage of key pressing can be set arbitrarily.

Therefore, if the volume level of a musical tone is controlled, for example, in accordance with the touch data obtained when the changeover switch 136 is set to the a side, the preset value P1 is set as shown in FIG.
The smaller the touch force is, the smaller the volume level will be when the touch force is small, and the volume level will not be so small when the touch force is large, so the dynamic range will be expanded.

That is, when the touch force is small, the moving speed of the key is slow, so the smaller the preset value P1 is, the more the key press signal is generated after the key press starts, and the counter 131m starts counting the key operation pulses CKt. The latch circuit 132
The value of the touch data output from the device becomes smaller, and the volume level decreases.

However, when the touch force is large, the key press speed is fast, so
Even if the preset value P1 is reduced, a key press signal is immediately generated and the counter 131 starts counting the key operation pulses CK1, so there are fewer pulses that are not counted. Therefore, the value of the touch data does not change much depending on the magnitude of the preset value, and the volume level does not decrease much.

Since the dynamic range can be varied in this manner, it is possible to provide a performance device with arbitrary expressiveness, and in particular, the degree of freedom in playing trills is increased.

This feature can also be used to control the volume of a player piano.

For example, when storing initial touch data together with pitch information and note length information, the preset value P1 is set to the maximum value (full count) of the counter 112 immediately before overflow.
value) or a relatively large value, and set it to a relatively small value during playback (automatic play).
Notes that do not reach a certain level of touch force will move the key but will not be pronounced, allowing you to carefully check the spell force. Although it has been explained that a circuit for generating such touch data is provided for each key, it is also possible to provide only one set of circuits for each key and time-share the circuit for each key. You may also use it.

It is also possible to realize all the functions of these circuits through program processing using a microcomputer. <Second Circuit Example> Next, a second circuit example according to the present invention will be described with reference to FIGS. 24 and 25.

FIG. 24 shows the touch data forming circuit 13 of the first circuit example.
This is a block diagram showing only the part corresponding to 0, and the other parts are the same as the first circuit example shown in FIG.
Illustrations and explanations thereof will be omitted.

This touch data forming circuit 230 has the same counter 131, FF 135, and differentiation circuit 134 as the touch data type circuit 130 described above, but has four latch circuits 132a to 132d as latch circuits, and can also be used as an /OS circuit. Four /○S circuits 135a to 135d are connected in series, and the rise when the output of each /OS circuit changes from ゜O゛ to ゜1゜ is determined by each latch circuit 132a to 132a.
It is a 2d latch signal. Furthermore, the value obtained by subtracting the A input from the B input (B-A
) between the outputs of the latch circuits 132a and 132b, the latch circuit 13
between the outputs of 2b and 1320, and between the latch circuits 132c and 1
32d, and sends the outputs of the subtraction circuits 137a to 137C together with the output of the latch circuit 132a to the multi-circuit as touch data via AND gates 139a to 139c, respectively.

Furthermore, the output of the latch circuit 132a is used as the A input, and the output of the subtraction circuit 137a is used as the B input, and when C<A-B, the output is set to ゜l゜ (here, C is a certain positive value, for example, `` 3') is provided, and its output is inverted by a NOT circuit N1 and given to the AND circuit 139a as an inhibition signal, and when the inhibition signal is 'O', the output is A.
A prohibition means is provided to close the ND gate 139a. As a similar prohibition means, a subtraction comparison circuit 138b is provided between the outputs of the subtraction circuits 137a and 137b, and its output is
It is inverted by a T circuit N2 and used as a prohibition signal for the AND gate 139b, and a subtraction comparison circuit 138c is provided between the outputs of the subtraction circuits 137b and 1370, and its output is inverted by a NOT circuit N3 and used as a prohibition signal for the AND gate 139c.

According to this circuit, when FF 1 315 is set by the key press signal when the output of the converter 116 of the key press detection circuit 100 in FIG.
Since the output becomes 0°, the counter 131 is enabled and starts counting the key operation pulse CKI.

At the same time, the differentiation circuit 134 at the rise of the Q output of FF1"1B
generates a differential pulse and triggers the /OS circuit 135a. After that, the /○S circuit 135 is sequentially delayed by a predetermined time.
b, 13sc, and 13sd are triggered and sequentially provide latch signals (rising signals) to latch circuits 132a to 132d at predetermined time intervals.

Therefore, assuming that the delay time caused by each of the /OS circuits is τ, each of the latch circuits 132a to 132d calculates the count value at times τ, 2τ, 3τ, and 4τ after the counter 131 starts counting the key operation pulse CKI. will be latched.

Then, the output of the latch circuit 132a is bound to the touch data, and the output of each subtraction circuit 137a to 137C is
Touch data ■ via ND gates l39a to 139c
, ■, ■ and send it to the multi-circuit. However, if the output of the latch circuit 132a or the value obtained by subtracting the output of the subsequent subtraction circuit from the output of the previous subtraction circuit becomes larger than the set value C, the output of the subtraction comparison circuit becomes 1 degree, and the output of the NOT circuit becomes Since the value becomes ゜O゜, the AND gate closes and the output of the subtraction circuit is no longer output as touch data. For example, latch circuits 152a, 1'52b, 152Q
, 132d outputs are "22", "53" and r64, respectively.
If it is J r64J, the touch data ■ is r
22".

And each subtraction circuit 1'57a, 157b, 1:! i7
The outputs of C are "31,""11," and "0," respectively, and A-B of the subtraction comparison circuit 138a is r-9.
= 3, C<A-B does not hold, so the output is ゜O
゜, and the output of NOT circuit N1 is ゛1゜, so A
The ND gate 139a is opened, and the output r23 of the subtraction circuit 137a becomes touch data ■. Also, since A-B of the subtraction comparison circuit 138b is "20", C<A-H, so its output becomes "1", and NO
Since the output of T circuit NZ becomes ゜0゜, AND gate 13
9b is closed, and the output "11" of the subtraction circuit 137b is not output as touch data ■. The output of the subtraction circuit 137C is "O" and the AND gate 139C is also closed, so of course the touch data (2) is not output.

By doing this, when the key is pressed relatively slowly, the key operation pulse CKI is input until the latch circuit 132d latches the count value of the counter 131, so that the case shown in FIG. 25(a) like 1, 4
Accurately obtain two latch data.

However, when the key is pressed strongly, its displacement speed increases, so that, for example, as in case 2 shown in FIG.
Since the key press ends and the key operation pulse CKI is no longer input before the count value is latched, this subtraction circuit 13
Since the output of 7b will not be the correct number of pulses during the time τ, its output is inhibited.

In this case, the touch data ■ is, for example, the value of the touch data ■ plus the difference between ■ and ■ (in this example, .31
+9=40) may be corrected and used.

According to this embodiment, it is possible to control the volume of the envelope waveform, such as the attack level, using touch data. In addition, by using the values of each touch data ~ n or the magnitude of the difference (corresponding to the key press acceleration), you can control the tone color, the sustain time of the envelope waveform, or change the pitch fluctuation, vibrato, or 2-bit tremo. Depth, speed, etc. can also be controlled.

Furthermore, it is also possible to control the timbre (combination of harmonic synthesis, etc.) of each of the following sections using touch data ① to n. In this way, according to this embodiment, touch data is obtained by counting key operation pulses for each of a plurality of time periods during a key press, and different musical tone control parameters are changed for each, thereby making it possible to perform fine-grained musical tone control. This makes it even easier for the performer to inject emotion into the player.6 Note that if a large number of latch circuits and /OS circuits are provided, a large number of touch data will be generated if the time for one key press is divided into a larger number of time intervals. You can try to get .

Moreover, if the counter is reset every time one latch circuit latches the count value of the counter 131 and starts counting the key operation pulses again, the subtracting circuits 137a to 137C become unnecessary.

Further, the functions of this touch data type circuit 230 can of course be realized by program processing using a microcomputer.

<Third Circuit Example> Next, a third circuit example will be described with reference to FIGS. 26 onwards. FIG. 26 is a block diagram showing a third circuit example with the multi-circuit and subsequent parts in FIG. 21 omitted.

In this circuit example, a key operation pulse detection circuit 100' includes an amplifier 101 and a waveform shaping circuit 1, similar to the circuit shown in FIG.
02', but this time, the pulse signal generated in the coil L or the photo sensor is shaped to output the key operation pulse CKI both when the key is lowered and raised.

The key press detection circuit 110 and the key press end detection circuit 120 are the 21st key press detection circuit 110 and the key press end detection circuit 120.
This circuit is similar to the circuit shown in the figure, and features of this circuit include a touch data forming circuit 330 and a newly provided key return signal detection circuit 170.

The touch data forming circuit 330 includes the same counter 131 and FF 13 as the touch data forming circuit 130 in FIG. and a set/reset type FF33B and two D-type FF5s forming a 2-bit shift register.
37, 338, and an AND circuit 339.

The key return signal detection circuit 170 is a circuit that generates a return pulse immediately before the key is completely raised and returned, based on a signal generated by the photo sensor 18 shown in FIG. 13 or other proximity sensor NS. Type FF17
1, a NOT circuit 172, and an AND circuit 173. When the key is operated, the proximity sensor NS
For example, when a pulse signal a as shown in FIG. 27(a) is generated, the FF 171 outputs a pulse signal b delayed by one pulse of the clock pulse CKo, as shown in FIG. 27(b).

On the other hand, the NOT circuit 172 inverts the pulse signal a and outputs the pulse signal C shown in FIG.
performs an AND operation on the pulse signal C and the pulse signal b output from the FF171, and outputs the key return pulse d shown in FIG. This key return pulse d is generated at a position (2) between the lower limit position (2) when the IK is pressed and the upper limit position (2) at the time of return shown in FIG. 28, and just before the key returns completely to the upper limit position (2).

Then, this key return pulse d is used as a reset signal for FF'5"l6, and the latch circuit 332 and FF32;
, 33B, touch data type or circuit 3
30 is entered.

Therefore, before a key is pressed, the FF 336 is reset by the key return pulse generated when the previous key was pressed, and the latch circuit 332 and FFs 2; 7 and 338 are in a cleared state.

Then, as the preset value P3 by the preset value setting circuit 334, a small value of about "2 to 4" is set, for example.

When the key press starts, as in the case of the circuit shown in Fig. 21,
The Ia operation pulse detection circuit 100' outputs a key operation pulse CK1 at a pulse interval inversely proportional to the key displacement speed, and when the key displacement speed exceeds a set value, the key press detection circuit 11
0 converter 116 makes the output ゛1゜, so F
F133 is set to release the reset of the counter 131.

The counter 131 counts the subsequent key operation pulses CKI, and when the count value reaches the preset value P3,
Since the two inputs A and B of the 1M detection circuit 335 become A=B, its output becomes 1° and sets pF33B. As a result, one input of the AND circuit 339 and the D input of the FF 357 become 1°.

By doing this, even if a key operation pulse is generated when the key vibrates or the player unintentionally lightly touches the key and is counted in the counter 131, As shown above, depending on the input timing of the key operation pulses, some of the key operation pulses may be counted before the key movement speed reaches the set value, but in such cases, extremely small counts may occur. By preventing the value from being latched, it is possible to prevent malfunctions such as erroneously outputting the value as initial touch data.

Thereafter, the counter 131 continues to count the key operation pulses CK1, but when the key reaches the most pressed position and stops, the output of the comparator 122 of the key press end detection circuit 120 becomes ゜1.
Therefore, the latch signal output from the AND circuit 339 becomes 1°, and the latch circuit 332 latches the count value of the counter 131 at that time.

Further, since a pulse is input to the CK terminal of FF3''17.338, the Q output of FF2i37 whose D terminal is set to 1° becomes 1°, and the selector 333 is enabled.

When the selector 333 is enabled, the latch circuit 33
Input the count value latched to 2 and set it to "0"
The second output line as initial touch data from the side output line.
It is output to the multi-circuit 140 in FIG.

Further, at this time, the FF 133 is reset and its /Q output becomes 1 degree, so that the counter 131 is reset with a delay of the inversion time of the FF 133 and enters the disabled state.

After that, when the key starts to rise, the key operation pulse CKI again
occurs and the key press detection circuit 110 detects it, the counter 131 is released from reset and starts counting the key operation pulse CK1.

If the key is stopped again before it reaches position 2 in FIG. Since the D terminal is set to 1°, when a pulse is input to the CK terminal, the Q output becomes 1°, and a switching signal is given to the selector 333.

Thereby, the selector 333 inputs the count value latched by the latch circuit 332, and outputs it to the multi-circuit 140 as aftertouch data from the "1" side output line.

Thereafter, each time the key is pressed between positions ■ and ■ shown in FIG.
2 and output from the selector 333 as aftertouch data. Then, when the key returns to position ■ or above, the key return pulse d is output from the key return signal detection circuit 170, so the latch circuit 332 and FF3''17, 338 are cleared, and the selector 333 enters the disabled state. The previous count value of 131 is not output as aftertouch data. Therefore, if the key is pressed and then returned to the upper limit, only the initial touch data will be output.
Aftertouch data is not output. Such a circuit is provided corresponding to each key, and the initial touch data and aftertouch data output from each touch data forming circuit 330 are sent to the multi-circuit 140.
input the initial touch data and aftertouch data for each key in a time-sharing manner. Musical tone signal generation circuit 150
send to

As in the case described above, various musical tone control parameters including the attack level (volume) of the generated musical tone signal can be controlled in multiple stages using the initial touch data.

Further, the aftertouch data allows after-control after the musical tone is generated, such as multi-step musical tone control using various parameters such as delay vibrato, tremolo, pitch change, timbre change, sustain waveform, etc.

According to this circuit, initial touch data and aftertouch data can be detected by a common circuit.

〔Effect of the invention〕

As explained above, according to the present invention, a signal that changes with high precision in a non-contact manner (in the case of a pulse signal, the generation interval changes) in response to the amount of operation of a control element is generated, thereby producing a musical tone. Since the control parameters are changed in multiple stages, stable and fine-grained musical tone control is possible, and the performer's emotions can be expressed richly.

Furthermore, there is a high degree of freedom in design, and there are no problems in terms of durability.

Moreover, since the structure for generating pulses is simple, it is durable and can be realized at low cost.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the keyboard mechanism of the first embodiment of the present invention, Fig. 2 is a sectional view thereof, Fig. 3 is an explanatory diagram of the magnet pattern that forms on the hammer, and Fig. 4 is its frame. Fig. 5 is a developed view of the flexible board, Fig. 6 is a perspective view of the conductive pattern formed on the flexible board, Fig. 7 is a front view showing the completed state of the hammer, and Fig. 8 is a perspective view showing the state of the middle part of the hammer before being outsert; FIG. 9 is an explanatory diagram showing the method of magnetizing the magnet pattern; FIG.
The figure is a schematic diagram showing the relationship between the conductive pattern and the magnet pattern to explain the principle of pulse generation according to this embodiment. Figure 11 is an explanatory diagram showing different examples of the conductive pattern.
Fig. 2 is an explanatory diagram showing different examples of magnet patterns formed on the hammer, Fig. 13 is a sectional view showing the keyboard mechanism of the second embodiment of the invention, and Fig. 14 is a usage state of the third embodiment of the invention. 15 is a sectional view showing the push button mechanism, FIG. 16 is a perspective view of a laminated magnet fixed to the push button key, and FIG. 17 is a fourth embodiment of the present invention. FIG. 18 is a perspective view of the same, FIG. 19 is an enlarged sectional view of the main part showing the relationship between the magnet plate and the coil, and FIG. 20 is a fifth embodiment of the present invention. 21 is a block diagram of the first circuit example according to the present invention; FIG. 22 is a waveform diagram of generated key operation pulses; and FIG. 23 is a preset value P1. FIG. 24 is a block diagram of only the touch data creation part of the second circuit example according to the present invention, FIG. 25 is an explanatory diagram thereof, and FIG. 26 is according to the present invention. FIG. 27 is a block diagram of the third circuit example, FIG. 27 is a waveform diagram of each part for explaining the operation of the key return signal detection circuit, and FIG. 28 is an explanatory diagram for explaining the operation of this embodiment. 1,11...#2,12...Keyboard frame 5...Hammer (interlocking member) 5d...Magnet pattern 7,21. 31... Frame 8... Flexible substrates 9a, 8c... Conductive patterns 20. 30... Magnet block 60... Body of palm-held electronic musical instrument 61... Push button key 62... Laminated magnet 65 ...Coil 7
1...Push button key 72...Magnetic plate 75...
Coil 93...Support stand 94...Treadboard 100
, 100'...Key operation pulse detection circuit 110...Key press detection circuit 120...Key press end cycle detection circuit 130, 230.3i30...Touch data type circuit 140...Multi-circuit 150...・Musical sound signal generation circuit 160...Sound system 170...Key press return signal detection circuit of the first embodiment...Noma D king 7 Figure 7 Part of the part of the first practical example Diagonal diagram Figure 8 Figure 9 Figure 10 Example 1 Example of conductive pattern/D Different example ! ．． Fig. 14 Fig. 15 Fig. 3 plan 3 examples of loading and unloading mug funoto 9 + raft Fig. 16 Fig. 19

Claims (1)

[Scope of Claims] 1. In an electronic musical instrument having an operator for controlling musical tones, a magnet is disposed on one of the operator, a member interlocking with the operator, and a member supporting the operator, and a coil is disposed on the other. so that the magnet and the coil move relatively close to each other in a non-contact manner in response to the operation of the operator, and generate a signal by an induced current in the coil, and in response to the generated signal. An electronic musical instrument characterized by comprising means for changing musical tone control parameters in multiple stages. 2. The electronic musical instrument according to claim 1, wherein the magnet is magnetized so that north poles and south poles alternate at a predetermined pitch throughout the entire stroke in the moving direction of the operator or the member interlocked therewith. The coil is connected to the north pole and the south pole substantially parallel to the magnetization direction of the magnet.
A large number of pulse signals are generated by the induced current, which is formed at a pitch substantially the same as the pitch of the poles, and whose direction changes alternately in the coil over the entire stroke in response to the operation of the operator, and the number of pulses generated is An electronic musical instrument characterized in that musical tone control parameters are changed in multiple stages accordingly.