JP2008046370A - Keyboard device of electronic music instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a keyboard device of an electronic music instrument in which a key is vibrated when the key is depressed, the vibration is not transmitted from the keyboard device to the other components etc. of the electronic musical instrument and the keyboard device is easily vibrated. <P>SOLUTION: Mechanical vibration generation units 5a to 5c are attached to a backplane of a horizontal plane section 1b, and mechanical vibration is generated when at least one of a plurality of key switches 3 corresponding to respective keys is operated. When the key is deeply depressed, a projection piece 2b abuts on the horizontal plane section 1b, so that the vibration passing through the projection piece 2b transmitts to a player's finger. Vibration absorption members 6a and 6b are arranged between the backplane of the horizontal plane section 1b and a keyboard support member 7. The keyboard device is made into a floating structure that the keyboard device is floated through the vibration absorbing members 6a and 6b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a keyboard device for an electronic musical instrument, and has a function of transmitting vibration to a performer's body.

  In a natural natural musical instrument such as a piano, guitar, and trumpet, the musical instrument itself is a sounding mechanism having a vibrating body. Therefore, vibrations directly transmitted to the performer's body other than musical sounds that can be heard are comfortable, and a feeling of playing can be obtained. On the other hand, an electronic musical instrument produces a musical tone signal generated by an electronic sound source, so that it does not feel as if it is being played and is not as good as a natural natural instrument in terms of ease of empathy.

Thus, there is known a device in which a driver (mechanical vibration generator) is attached to a thin metal diaphragm covering the entire lower part of the keyboard, and a musical sound signal output from a sound source is output to the driver. In addition, a driver is attached to a diaphragm divided into a plurality of sound ranges, this diaphragm is attached to a vibration frame, this vibration frame is arranged so as to face the entire lower part of the keyboard, and a musical sound signal output from the sound source is What outputs to a driver through the filter according to each sound range is known. (See above, Patent Document 1)
In addition, when a key is pressed, a normal tone signal is generated by the sound source and output from the speaker, and the key protrusion comes into contact with the elastic resistor, so that an electromagnetic magnet (mechanical vibration generator) is provided below the key. 2. Description of the Related Art A keyboard device for an electronic musical instrument that controls the amplitude of an alternating current power source supplied to the power source and the frequency modulation depth of a low frequency oscillator to vibrate an iron piece attached to a key protrusion (see Patent Document 2) is known. .
However, as a practical matter, if the keyboard is vibrated, the vibration is transmitted to the housing of the electronic musical instrument to which the keyboard is mounted and fixed. Therefore, structural parts such as mounting screws, electronic circuit boards, panel switches, and wiring bundles also vibrate. Exposed to. As a result, when the parts touch each other, abnormal noise (mechanical noise) is generated, the screws are loosened, and the parts are damaged.
In addition, vibration is transmitted from the housing of the electronic musical instrument to a table on which the housing of the electronic musical instrument is placed, so that there is a problem that vibration energy is lost and vibration is difficult.

On the other hand, in the electronic piano, vibrations of the keyboard unit due to keystrokes are transmitted to the bottom plate, and vibration sound when the hammer of the pseudo piano action mechanism returns to the initial position when the key is released is transmitted to the bottom plate. Resonates with and can be heard outside as a loud hitting sound.
In particular, when the performance is performed using headphones, only the striking sound and operation sound associated with the performance can be heard, and there is a problem that the electronic piano becomes a noise source. For this reason, a keyboard device is known in which a cushion material as a silencing cushioning material is interposed between the keyboard unit and the bottom plate (see Patent Document 3).
However, the above-described electronic piano is not an electronic musical instrument that actively generates mechanical vibrations of the keyboard unit so that a feeling of playing can be obtained.
Japanese Patent Laid-Open No. 2-118598 JP 9-54583 A (Patent No. 3267113) JP 2004-233773 A

  The present invention has been made in order to solve the above-described problems, and prevents vibrations from being transmitted from the keyboard device to other components of the electronic musical instrument, etc. It is an object of the present invention to provide a keyboard device for an electronic musical instrument that makes it easy to vibrate.

In the invention of claim 1, the present invention has a plurality of keys, the key body of each key is attached to the frame via a key fulcrum, and the frame is placed on the keyboard support member. In a keyboard apparatus for an electronic musical instrument, a key switch corresponding to each key is operated by a key pressing operation, and a musical tone signal having a pitch corresponding to the key switch is generated by a musical tone signal generating means and output from an electroacoustic transducer , Having at least one mechanical vibration generator and an anti-vibration member, wherein the mechanical vibration generator is attached to the frame and generates mechanical vibration when at least one of the key switches corresponding to each key is activated. The vibration-proof member is disposed between the frame and the keyboard support member.
Therefore, at the same time as listening to the musical tone signal with the ear, vibration can be felt from the finger touching the key in accordance with the key pressing operation. As a result, the feeling of playing is strengthened.
Since there is an anti-vibration member from the frame to the keyboard support member, vibration is not easily transmitted. As a result, the electronic musical instrument component other than the casing of the electronic musical instrument and the keyboard device attached thereto is not vibrated.
On the other hand, when the frame is fixed to the keyboard support member, the frame is less likely to vibrate.
It should be noted that the key body of each key has a protrusion, and if the key protrusion rotates and abuts against a part of the frame according to the key pressing operation of each key, the key is pushed down deeply. When this occurs, the projection comes into contact with the frame, and a vibration path of the frame is directly transmitted from the projection through the key body portion to the depressed finger, so that the feeling of playing is enhanced.

According to a second aspect of the present invention, in the keyboard device for an electronic musical instrument according to the first aspect, the key body of each key has a protrusion, and the mechanical vibration generator is assigned to each key. The protrusion of the key rotates in response to the key pressing operation of each key and is disposed at a position where the key abuts against the mechanical vibration generator, and generates mechanical vibration when the key switch of the key is activated. is there.
Therefore, when the performer pushes in until the protrusion of the key main body comes into contact with the mechanical vibration generator, the vibration generated by the mechanical vibration generator passes directly from the protrusion through the key main body to the pressed finger. Because there is a way to communicate to the, the feeling of playing is stronger.
At that time, vibration is transmitted to the other keys from the frame through the key fulcrum, etc., so that if the performer touches the other keys, the other keys can feel the vibration, and the vibration of the entire keyboard is also felt. it can.
Here, in addition to the vibration isolation member provided between the frame and the keyboard support member, another vibration isolation member may be provided between each mechanical vibration generator and the frame. The vibration from the key pressed by the performer can be felt particularly strongly, and the vibration transmitted from the frame to the keyboard support member can be further reduced.

According to a third aspect of the present invention, in the keyboard device for an electronic musical instrument according to the second aspect, the mechanical vibration generator converts an electric vibration signal into a mechanical vibration, and the key switch of the key is activated. At this time, an electric vibration signal corresponding to the key switch of the key is supplied.
Therefore, the mechanical vibration corresponding to the key switch operated by the key press can be felt from the finger pressing the key. As a result, the feeling of playing is strengthened.
As the electric vibration signal corresponding to the activated key switch, the musical tone signal generated by the sound source unit and output to the electroacoustic transducer (speaker) by the operation of the key switch, more preferably, the musical tone signal / electrical signal is output. The vibration signal is converted into an electric vibration signal in a frequency band suitable for mechanical vibration through the vibration signal converter.

Here, in addition to the mechanical vibration generator provided for each key, at least one other mechanical vibration generator is brought into contact with the projection of the key rotating in response to the key pressing operation of each key. You may arrange | position in the position which does not.
In this case, vibrations that are directly transmitted to the key that has been pressed and vibrations that are transmitted to the entire keyboard are individually generated. Therefore, it is possible to generate a vibration close to that felt by a natural musical instrument.
The other mechanical vibration generator described above converts, for example, an electric vibration signal into a mechanical vibration, and when at least one of the key switches corresponding to each key is activated, the electric vibration corresponding to the activated key switch. A signal is supplied. Alternatively, an electrical vibration signal independent of the activated key switch may be provided.

The present invention has an effect that the energy of the vibration generated by the mechanical vibration generator that vibrates the key is not easily transmitted to the electronic musical instrument components other than the keyboard device. There is an effect that the keyboard device is easily vibrated by floating the frame by the vibration isolating member.
As a result, it is possible to prevent the generation of noise due to the structural parts such as the electronic circuit board, the panel switch, and the wiring bundles coming into contact with each other and the loosening and breakage of the parts. Loss of vibration energy is reduced.

FIG. 1 is an explanatory diagram of a first embodiment of the present invention. FIG. 1A is a right side view of one key, and FIG. 1B is an explanatory view of the back surface of the frame.
In FIG. 1A, 1 is a frame, and 2 is a key body. The keyboard of the electronic musical instrument has a plurality of white keys and black keys. Here, only one white key is illustrated. Reference numeral 1 denotes a frame, and the key body 2 of each key is attached to the rear end wall 1a via a key fulcrum (horizontal hinge) 2a at the rear end.
Switch board mounting portions 1c and 1d are projected on the upper surface of the horizontal surface portion 1b, a switch board 3 is attached to these, and a flexible and dome-shaped key switch (on / off sensor) 4 is mounted on the board. Yes.

In response to a key pressing operation on the distal end portion 2c side, a contact portion (not shown) at the bottom of the key body portion 2 presses the key switch 3 to activate the key switch 3, and the activated key switch 3 A musical tone signal having a corresponding pitch is generated by a musical tone signal generation unit 54 described with reference to FIG. 3 and output from a speaker (electroacoustic transducer).
Reference numeral 2b denotes a protruding piece (protruding portion), which is provided at the lower portion of the key body 2 near the tip 2c. In the illustrated example, when the key is depressed deeply, the projecting piece 2b comes into contact with the horizontal surface portion 1b.
In a conventional keyboard device for an electronic musical instrument, a stopper piece that regulates a lower limit and an upper limit of a key depression position is provided on the key body, and can be used as a projecting piece.
A keyboard device (keyboard unit) is configured by the frame 1 and members such as the key body 2 attached thereto. Reference numeral 7 denotes a keyboard support member. For example, a portable electronic musical instrument is a lower case (lower casing), and a stationary electronic musical instrument having legs is a shelf board (housing bottom plate).
The above configuration is basically the same as that of a conventional electronic keyboard instrument.

In this embodiment, since the mechanical vibration generator 5 (5a to 5c) is attached to the back surface of the horizontal surface portion 1b, the vibration spreads over the entire keyboard device.
When at least one of the plurality of key switches 3 corresponding to each key is activated, the mechanical vibration generator 5 generates mechanical vibration in synchronization with the sound of the musical sound signal output from the speaker (electroacoustic transducer). The frame 1 is vibrated, and the entire keyboard device is vibrated through a member coupled to the frame 1 or through air vibration.
Further, when the key is pressed down deeply, the projecting piece 2b comes into contact with the horizontal surface portion 1b, so that vibration through the projecting piece 2b is also transmitted to the performer's finger.
In the example shown in FIG. 1B, a plurality of mechanical vibration generators 5a to 5c are distributedly arranged along the key arrangement direction in the middle portion of the horizontal plane portion 1b in the key longitudinal direction (key depth direction). Thus, it is possible to apply uniform vibration to all keys of the keyboard.

The mechanical vibration generators 5a to 5c described above may be anything such as an electromagnetic actuator (solenoid or voice coil motor), an eccentric motor (for example, a DC coreless motor with an eccentric weight attached to the motor shaft), a piezoelectric actuator, or the like. It is sufficient that the output and frequency characteristics are sufficient to vibrate the entire keyboard.
The vibration frequency is preferably several Hz to 30 Hz.

On the other hand, the vibration isolating members 6 a and 6 b are disposed between the back surface of the horizontal surface portion 1 b and the keyboard support member 7. By making the keyboard device a floating structure that floats via the vibration isolating members 6a and 6b, it is possible to suppress the vibration generated by the mechanical vibration generators 5a to 5c from being transmitted to the electronic musical instrument components other than the keyboard device. .
In the example shown in FIG. 1B, the vibration isolation members 6a and 6b are band-shaped in the key arrangement direction, and are attached to the front and rear portions of the horizontal surface portion 1b with the mechanical vibration generators 5a to 5c interposed therebetween. . It is attached between the horizontal surface portion 1b and the keyboard support member 7 by its own welding, adhesion, or a screw or engagement structure.
If the vibration isolating members 6a and 6b are too soft, the key touch is adversely affected, which is inappropriate. A material that has sufficient rigidity to support the frame 1 and hardly transmits minute vibrations is desirable.
Examples of the vibration isolating members 6a and 6b include a metal spring, an air spring, a vibration isolating rubber, a urethane foam, and a polymer gelation damping material. Anti-vibration members having different characteristics may be used in combination.
At a vibration frequency that is somewhat higher than the natural frequency, the vibration isolation state is obtained, and the vibration isolation member reflects the vibration and the vibration transmission rate becomes small. On the other hand, when the vibration is attenuated by the internal loss of the vibration isolating member, the transmission rate of vibration is reduced.

FIG. 2 is an explanatory diagram of a second embodiment of the present invention. It is the schematic of the cross section which looked at the housing | casing of the electronic musical instrument from the right side surface. Hereinafter, the depth direction of the key is referred to as “rear”, and the direction of the tip of the key is referred to as “front”. The direction in which the keys are arranged and arranged is called “key arrangement direction”.
In the figure, reference numeral 11 denotes a frame, which is integrally formed of resin, but may include a metal member in part.
First, the structure of the frame 11 will be described.

A rear lower portion of the frame 11 is a rear mounting portion 11a, and a screw boss portion 11b is provided here. There is a rear vertical wall 11c adjacent to the front of the rear attachment portion 11a, the upper end thereof being the rear vertical wall upper end portion 11d, and the front thereof being the key attachment portion 11e. There is a gentle inclined surface portion 11f ahead, and a switch board mounting portion 11g at the front end.
Conventionally, an operation panel substrate is attached to the above-described rear vertical wall upper end portion 11d. However, since it is easily affected by the vibration of the frame 11, it is better to avoid attaching it directly.
The switch board mounting portion 11g is coupled to the central horizontal base portion 11i with a stepped portion below through a central reinforcing rib 11h. As shown in the figure, the reinforcing rib is also formed between the rear mounting portion 11a and the rear vertical wall 11c, but the description thereof is omitted. The reinforcing ribs are plate-shaped having a predetermined thickness in the key arrangement direction, and a plurality of reinforcing ribs are formed in a portion where, for example, white keys are adjacent to each other at intervals in the key arrangement direction. Is done.

A switch board mounting portion 11j is erected on the central horizontal base portion 11i.
In front of the central horizontal base portion 11i, there is a front mounting portion 11k having an inclined portion further downward. Here, a screw boss portion 11l is provided. A front vertical wall 11m rises from the front mounting portion 11k to become a lower limit stopper holding portion 11n, where a lower limit stopper 31 such as a felt material is provided, and a key guide support portion 11o is coupled in a wall shape in front thereof. A plate-shaped key guide 11p having a thickness in the width direction of the key is coupled to this, and a front horizontal base portion 11q projects forward at the lower end.

In this keyboard device, for example, an octave key is composed of one black key unit composed of a plurality of black keys and two white key units formed in a comb-teeth shape with at least every other white key. The rear end portions of the keys are joined at a common base end portion and are integrally formed of resin.
12 is a key body (white key), 12a is a key fulcrum function part (horizontal hinge), 12b is a projecting piece (projecting part) facing the mechanical vibration generator 19 on the frame 11 side, and 12c is a tip part. And 13 is a common base end of the white key unit. 12′a is a key fulcrum function part (horizontal hinge) of another white key unit not visible in this figure, and 13 ′ is a common base end part of the other white key unit. 14 is a key body (black key), 14a is a key fulcrum function (horizontal hinge), 14b is a projecting piece, and 15 is a common base end of the black key unit.
The common base end portions 13, 13 ′, and 15 described above are positioned by overlapping the concave portions and the convex portions, and are aligned and fixed on the key attachment portion 11 e by screws 16.

  A switch substrate 17 is attached to the switch substrate attachment portion 11g and the switch substrate attachment portion 11j, and a key switch (on / off sensor) 18 is placed on the switch substrate 17. When the front end portion 12c is pressed, the abutting portion provided at the middle lower portion of the key body portion 12 pushes the key switch 18, whereby the key switch 18 is activated (turned on) to detect the key depression.

The number of mechanical vibration generators 19 equal to the number of keys is assigned to each key, arranged on the frame 11, and arranged at the same position in the depth direction as the front mounting portion 11k. When the tip 12c of each key is pressed deeply, the projecting piece 12b rotates downward and comes into contact with the upper surface of the mechanical vibration generator 19 (buffer material 19a).
In the illustrated example, a shock absorbing material 19a such as a felt material or an elastic body is provided on the upper surface of each mechanical vibration generator 19, and vibration is transmitted to the projecting piece 12b via the shock absorbing material 19a, but there is no shock absorbing material 19a. May be.

The mechanical vibration generator 19 generates mechanical vibration when the key switch 18 is activated in response to the key pressing operation of the assigned key.
This mechanical vibration generator 19 may be the same as the mechanical vibration generator 5 shown in FIG. 1, but it converts electrical vibration into mechanical vibration, and when the key switch 18 of the corresponding key is activated, The tone signal generator 64 described with reference to FIG. 4 may supply an electrical vibration signal corresponding to the corresponding key switch 18 to the mechanical vibration generator 19.
When the key switch 18 of the corresponding key is activated, the protruding piece 12b may already be in contact with the buffer material 19a, or after the key switch 18 is operated, the protruding piece 12b is in contact with the buffer material 19a. Also good.
As for the key body portion (black key) 14, the protruding piece 14b comes into contact with the upper surface of a similar mechanical vibration generator at a position overlapping the protruding piece 12b of the white key. These mechanical vibration generators are arranged in a line in the key arrangement direction regardless of whether they are for white keys or black keys.

A slit is provided in the left and right center of the key inside the key body 12 near the tip 12c. The key guide 11p is inserted into the slit to restrict the position of the key body 12 in the left-right direction (key arrangement direction).
When the tip portion 12c is pushed down, the key switch 18 is activated, and when the projecting piece 12b pushes the cushioning material 19a and is further pushed down further, the left and right side surfaces of the key body portion 12 are on the lower limit stopper holding portion 11n. The lower limit stopper 31 is contacted.
The lower limit can also be regulated by eliminating the lower limit stopper 31 and causing the projecting piece 12b to contact the upper surface of the mechanical vibration generator 19 directly or via the cushioning material 19a.

Reference numeral 20 denotes a lower case (lower casing) which serves as a keyboard support member. Reference numerals 20a and 20b denote concave portions provided on the bottom surface, which are at positions corresponding to the screw boss portions 11b and 11l of the frame 11 described above. Reference numerals 20c and 20d denote speaker support portions, and reference numeral 20e denotes a front surface (a mouth bar portion) of the housing.
In the recess 20 a, the rear attachment portion 11 a is attached to the lower case 20 using a vibration isolation member 21, a vibration isolation member (ring) 22, a washer 23, and a screw (tapping screw) 24.
The anti-vibration member 21 has, for example, a shape in which two rings having different outer diameters are combined into two upper and lower stages. A hole having a smaller diameter than the inner diameter of the bottom surface is formed in the bottom surface of the recess 20a. The small-diameter side of the vibration isolation member 21 is fitted into the hole from above, and the small-diameter side protrudes downward from the hole. A ring-shaped vibration isolating member 22 is fitted into the protruding portion from below.

Next, the screw 24 is inserted into the hole of the vibration isolation member 21 from below through the metal washer 23, and the tip thereof is screwed into the screw boss portion 11b, whereby the frame 11 and the lower case 20 are fastened.
On the other hand, in the recess 20b, the frame 11 and the lower case 20 are fastened by using a vibration isolating member 25, a vibration isolating member (ring) 26, a washer (metal) 27, and a screw (tapping screw) 28.
The vibration isolating member 21 described above was a ring-shaped vibration isolating member. Instead of this, the anti-vibration member 21 may be an anti-vibration member having a band shape in the key arrangement direction as shown in FIG. In this case, ring-shaped convex portions may be formed only at the positions of the concave portions 20a and 20b and protrude from the holes on the bottom surfaces of the concave portions 20a and 20b as in FIG. The vibration isolating member 21 may be the same.

29 is an electroacoustic transducer (speaker), for example, a pair of left and right is provided in the key arrangement direction, and in the speaker support portions 20c and 20d of the lower case 20 (keyboard support member), by screws and engagement not shown, It is attached to the upper surface of the lower case 20. This attachment position is the lower part of the frame 11 (the empty space that is largely curved upward of the central reinforcing rib 11h). By arranging the speaker here, the electronic musical instrument can be reduced in size.
The front opening (the side with the cone) of the speaker 29 is arranged so as to face the upper rear (example shown) of the frame 11 or the upper front.
Reference numeral 30 denotes an upper case (upper housing) which covers the upper surface behind the rear end surface of the black key 14 and also serves as an operation panel (not shown). Reference numeral 30a denotes a rear sound emitting hole, and a large number of small holes or a large number of slits are formed in the upper rear portion and the rear portion of the upper case 3.
An electronic circuit board on which a musical sound signal generation unit, a control CPU, and the like are mounted in an empty space from the lower portion of the central reinforcing rib 11h, the lower portion of the central horizontal base portion 11i, and the rear end of the frame 11 to the rear portion of the upper case 30 The frame 11 is mounted on the lower case 20 without touching the frame 11.

The sound emitted from the speaker 29 is emitted from the adjacent gaps between the keys (key body parts 12, 14) through the gaps between the constituent members of the keyboard device, and one or more holes are formed in the rear vertical wall 11c. If sound is provided, sound is also emitted from a large number of rear sound emission holes 30a. If at least a part of the illustrated rear vertical wall 11c is eliminated and the rear mounting portion 11a and the key mounting portion 11e are coupled to each other by the central reinforcing rib 11h, the upper rear portion of the frame 11 opens greatly. Sound is easily emitted from the rear sound emission hole 30a.
Since the structure does not emit sound from the bottom of the lower case 20, there is no problem in sound emission even when the electronic musical instrument is placed on a desk and used.

  In the illustrated configuration, the mechanical vibration generator 19 is disposed on the front mounting portion 11k of the frame 11, and thus is close to the lower case 20 that is a keyboard support member. Accordingly, the structure of the frame 11 is changed so that the mechanical vibration generator 19 can be arranged at a location away from the lower case 20 such as the central horizontal base portion 11i, and the mechanical vibration generator 19 is also applied to the projecting piece 12b. You may change the shape and dimension of the protrusion 12b so that it may contact | abut.

In the illustrated configuration, the mechanical vibration generator 19 is directly attached to the frame 11. Instead of this, another vibration isolating member (not shown) may be interposed between the mechanical vibration generator 19 and the frame 11.
As a result, the mechanical vibration corresponding to the key switch operated by the player's key pressing can be felt stronger than the finger touching the other keys from the finger pressing the key, and from the frame 11 to the lower case. The vibration transmitted to 20 can be further reduced.

As the other vibration isolating member described above, for example, a belt-like sheet may be provided in the key arrangement direction as in the case of the vibration isolating member 6 shown in FIG. May be provided. In this case, there is no problem even if the vibration generated by the mechanical vibration generator 19 is transmitted to the frame 11, so that the ability of the vibration isolating member may be low.
When the above-described other vibration isolating members have high capabilities, the above-described anti-vibration members 25 and 26 can be omitted, and further, the anti-vibration members 21 and 22 can be omitted.

In the illustrated configuration, the mechanical vibration generator 19 is arranged for each key. In addition to these, at least one other mechanical vibration generator as shown as mechanical vibration generators 5a to 5c in FIG. May be provided on a position on the frame 11 so as not to come into contact, for example, on the upper surface or the back surface of the illustrated central horizontal platform 11i.
As another mechanical vibration generator described above, for example, an electric vibration is converted into a mechanical vibration, and the musical sound signal generation unit is configured such that when at least one of the key switches corresponding to each key is activated, An electric vibration signal corresponding to the pitch assigned to the other mechanical vibration generator may be supplied to the above-mentioned other mechanical vibration generators, or an electric vibration signal unrelated to the pitch assigned to the key may be supplied to the other It may be supplied to a mechanical vibration generator to vibrate the entire keyboard device.

FIG. 3 is a functional block diagram for generating musical tone signals as sounds and vibrations using the keyboard device of the electronic musical instrument shown in FIG. In this specification, it is called a musical tone signal including vibrations transmitted to the performer.
In the figure, reference numeral 50 denotes a keyboard device. Reference numerals 51a to 51l denote keys (key body 2 in FIG. 1), which do not distinguish between white keys and black keys. Reference numerals 52a to 52l denote key switches (key switch 4 in FIG. 1) that are operated by pressing the keys 51a to 51l.
Reference numerals 58a to 58c denote mechanical vibration generators (mechanical vibration generators 5a to 5c in FIG. 1), which are attached to a frame 59 (frame 1 in FIG. 1).
The key scanning unit 53 sequentially detects the operating states (on / off) of the key switches 52 a to 52 l at a predetermined scanning cycle, and outputs the operating states to the sound source unit 54 a of the musical tone signal generating unit 54. The hardware circuit and CPU control are implemented, and the interface to the tone signal generator 54 is implemented by CPU control.

The tone signal generator 54 includes, for example, a tone generator 54a and a tone signal / electric vibration signal converter 54b, and is realized by a semiconductor integrated circuit, DSP (microprocessor dedicated to digital signal processing), or a software tone generator program and CPU. The
The tone generator 54a may be the same as the tone generator used in a conventional electronic musical instrument, and is realized by a semiconductor integrated circuit, DSP, or a software tone generator program and a CPU.
When at least one key switch among the key switches 52 a to 52 l is activated, the tone generator 54 a generates a musical tone signal having a pitch assigned to the activated key switch and outputs the tone signal to the sound system 55.
When a chord (chord) is designated by pressing a key, a musical tone signal other than the pitch assigned to the key switch may be output.

  The sound system 55 amplifies the musical sound signal, performs volume control and sound image localization control, and outputs the sound as sound from the electroacoustic transducer, in the illustrated example, the left and right speakers 56a and 56b. It may be output from headphones or an electronic musical instrument without a built-in speaker.

On the other hand, the musical sound signal / electrical vibration signal conversion unit 54b converts the musical sound signal originally generated by the sound source unit 54a to be output as sound into an electric vibration signal for vibrating the mechanical vibration generators 58a to 58c. And output to the vibration drive unit 57. The musical sound signal / electric vibration signal converter 54b uses, for example, a filter having the characteristics described in Patent Document 1 (Japanese Patent Laid-Open No. 2-118598), and generates different electric vibration signals according to the mechanical vibration generators 58a to 58c. Output. A common electric vibration signal may be output to the mechanical vibration generators 58a to 58c.
An electric vibration signal having a frequency suitable for mechanical vibration may be output by reducing the frequency by using a frequency divider that divides the frequency of the musical sound signal by an integer. Depending on the structure and material of the keyboard device, unnecessary vibration frequencies may be eliminated, and characteristics may be adjusted so that optimum vibration can be applied.

When at least one of the key switches is activated, the musical sound signal generation unit 54 outputs an electric vibration signal corresponding to the activated key switch to the excitation drive unit 57.
The tone signal generator 54 increases the output level of the mechanical vibration generator arranged on the low frequency side of the keyboard when the vibration frequency is low, and the high frequency side of the keyboard when the vibration frequency is high. Control may be performed so as to increase the output level of the mechanical vibration generator disposed in the.
The illustrated configuration may be changed, and the output level ratio of the electrical vibration signals supplied to the mechanical vibration generators 58a to 58c may be controlled in accordance with the volume ratio of the musical sound signals supplied to the speakers 56a and 56b.
The vibration drive unit 57 amplifies the electric vibration signal and supplies energy sufficient to vibrate it to the mechanical vibration generators 58a to 58c. In addition, when using a DC eccentric motor, it converts into a DC voltage.

FIG. 4 is a functional block diagram for generating a musical sound signal as sound and vibration using the keyboard device of the electronic musical instrument shown in FIG.
In the figure, 60 is a keyboard device. Reference numerals 61a to 61l denote keys (in FIG. 2, key body portions 12 and 14), which do not distinguish between white keys and black keys. Reference numerals 62a to 62l denote key switches (key switch 18 in FIG. 2) that are operated by pressing the keys 61a to 61l. The mechanical vibration generators 68a to 68l (in FIG. 2, the mechanical vibration generator 19) are arranged for each of the keys 61a to 61l.
The key scanning unit 63 is the same as the key scanning unit 53 of FIG.

The tone signal generator 64 includes, for example, a tone generator 64a and a tone signal / electric vibration signal converter 64b, and is realized by a semiconductor integrated circuit, DSP, or software tone generator program and CPU.
Unlike the sound source unit used in a conventional electronic musical instrument, the sound source unit 64a is assigned an output channel for each key. When at least one key switch is activated, a musical tone signal corresponding to the key switch is generated and output to a channel assigned to the key switch.
The sound system 66 mixes the tone signals of a plurality of output channels corresponding to the key switches 62a to 62l, distributes them to the left and right stereo channels, and outputs them to the speakers 66a and 66b.

  As a result, a tone signal having a pitch assigned to the key corresponding to the activated key switch among the key switches 62a to 62l is generated and output to the sound system 65 from the output channel corresponding to the key switch. By mixing, the left and right speakers 66a and 66b can finally output the same sound as that output from the speakers 56a and 56b shown in FIG.

On the other hand, the musical sound signal / electric vibration signal conversion unit 64b uses the same filters and frequency dividers as the musical sound signal / electric vibration signal conversion unit 54b shown in FIG. 3, and the musical sounds corresponding to the key switches 62a to 62l. The signals are individually processed and output to channels corresponding to the key switches 62a to 62l. As a result, the vibration frequency and output level can be finely adjusted according to the key (key switches 62a to 62l).
The excitation drive unit 67 individually amplifies the electric vibration signals of the respective channels output from the musical tone signal generation unit 64, and vibrates the mechanical vibration generators 68a to 68l corresponding to the key switches 62a to 62l, respectively. Supply.

In the above-described music signal generation units 54 and 64 in FIGS. 3 and 4, the electric vibration signal is generated by using the output of the sound source unit for sound output. However, the electric vibration in which the vibration waveform corresponding to each key is stored is stored. You may use the vibration production | generation part only for a signal. In this case, the outputs of the key scanning units 53 and 63 are also output to the vibration generating unit dedicated to the electric vibration signal. For sound output, a sound source unit 54a and a sound system 55 used in a conventional electronic musical instrument are used.
In place of the musical tone signal generators 54 and 64 of FIGS. 3 and 4 described above, the electric vibration signals supplied to the mechanical vibration generators 58a to 58c and 68a to 68l via the excitation driving units 57 and 67 are operated. As an electric vibration signal that is not related to the key switch and is common to all the key switches, for example, a vibration like a box sound of a natural musical instrument may be generated.

As described with reference to FIG. 2, in addition to the mechanical vibration generator 19 arranged for each key, at least one other mechanical device as shown as mechanical vibration generators 5 a to 5 c in FIG. 1. There is a case where the vibration generator is provided at a position on the frame 11 that does not come into contact even if the protrusion rotates according to the key pressing operation of each key.
In this case, at least one other mechanical vibration generator described above is used for the mechanical vibration generator 19 arranged for each key, using the tone signal generator 64 and the excitation drive circuit 67 shown in FIG. For this, the tone signal generator 54 and the excitation drive circuit 57 shown in FIG. 3 are used.
However, in such a case, for at least one other mechanical vibration generator described above,
A common electric vibration signal may be supplied to all the key switches not related to the activated key switch described above.

It is explanatory drawing of 1st Embodiment of this invention. It is explanatory drawing of 2nd Embodiment of this invention. It is a functional block diagram for producing | generating a musical tone signal as a sound and a vibration using the keyboard apparatus of the electronic musical instrument shown in FIG. It is a functional block diagram for producing | generating a musical tone signal as a sound and a vibration using the keyboard apparatus of the electronic musical instrument shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Frame, 2 ... Key body part, 2b ... Projection piece (projection part), 4 ... Key switch, 5, 5a-5c ... Mechanical vibration generator, 7 ... Lower case (keyboard support member), 6a, 6b ... Prevention Vibration member 11 ... Frame, 11a ... Rear mounting portion, 11b ... Screw boss portion, 11h ... Center reinforcing rib, 11k ... Front mounting portion, 11l ... Screw boss portion, 12, 14 ... Key body portion, 12b, 14b ... Projection Piece (projection), 18 ... key switch, 19 ... mechanical vibration generator, 20 ... lower case (keyboard support member), 20a, 20b ... recess, 21, 22, 25, 26 ... vibration-proof member, 23, 27 ... Washers, 24, 28 ... screws, 29 ... speakers, 30 ... upper case, 31 ... lower limit stopper,
50, 60 ... keyboard device, 51a to 51l, 61a to 61l ... key, 52a to 52l, 62a to 62l ... key switch, 54, 64 ... musical tone signal generation unit, 54a, 64a ... sound source unit, 54b, 64b ... musical tone signal / Electric vibration signal converter, 57, 67 ... drive unit for vibration, 58a to 58c, 68a to 68l ... mechanical vibration generator, 59 ... frame

Claims (3)

It has multiple keys, the key body of each key is attached to the frame via the key fulcrum, and the frame is mounted on the keyboard support member, and the key switch corresponding to each key is activated by pressing the key A musical tone signal corresponding to the key switch is generated by the musical tone signal generating means and output from the electroacoustic transducer;
Having at least one mechanical vibration generator and a vibration isolating member;
The mechanical vibration generator is attached to the frame and generates mechanical vibration when at least one of the key switches corresponding to each key is activated.
The vibration isolator is disposed between the frame and the keyboard support member.
A keyboard device for an electronic musical instrument. The key body of each key has a protrusion,
The mechanical vibration generator is assigned to each key, and is arranged at a position where the protrusion of the key rotates and contacts the mechanical vibration generator in response to a key pressing operation of each key. It generates mechanical vibration when the switch is activated.
The keyboard device for an electronic musical instrument according to claim 1. The mechanical vibration generator converts an electric vibration signal into mechanical vibration, and when the key switch of the key is activated, an electric vibration signal corresponding to the key switch of the key is supplied.
The keyboard device for an electronic musical instrument according to claim 2.

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