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JP2013077000

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2013077000
Abstract: Even if a configuration for exciting a soundboard is provided, the change in the
vibration characteristics of the soundboard is reduced. A vibration excitation unit (50) includes a
vibration unit (51) connected to a soundboard (7) and a yoke holding unit (52) supported by a
support unit (55). Vibrating unit 51 has voice coil 512 arranged to be located in the magnetic
path formed by yokes 521 and 523 of yoke holding unit 52 and magnet 522, and vibrates
according to a drive signal inputted to voice coil 512. And excite the soundboard 7. Since loads
other than the vibrating portion 51 that vibrates according to the drive signal among the
vibrating portions 50 are supported by the support portion 55, the vibrating portion 50 hardly
affects the vibration characteristics of the soundboard 7. [Selected figure] Figure 5
Keyboard instrument
[0001]
The present invention relates to a technology for changing the sound of a keyboard instrument.
[0002]
In an electronic piano, it is generally performed to generate an electronic sound from a speaker.
In order to generate not only this electronic sound but also rich bass, a soundboard may be
provided also in the electronic piano. In this case, for example, Patent Document 1 discloses a
technique of emitting a sound from a soundboard by attaching a speaker to a soundboard and
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exciting the soundboard with the speaker. The application of this technology is not limited to
electronic pianos, and it is also disclosed that the technology is applicable to silent pianos
configured not to vibrate strings.
[0003]
JP, 2008-292739, A
[0004]
By the way, the sound quality of an acoustic piano is largely due to the vibration characteristics
of a soundboard that emits sound.
Therefore, when a heavy object which was not assumed at the time of manufacture is attached to
the soundboard, the vibration characteristic of the soundboard is largely changed by the
influence of the heavy material. As a result, the sound quality of the acoustic piano is degraded.
[0005]
In patent document 1, since the speaker which is a heavy load is attached to the sound board, the
vibration characteristic of a sound board will change a lot before and after attachment of a
speaker. Therefore, when the technology disclosed in Patent Document 1 is applied to an
acoustic piano, the vibration characteristic of the soundboard changes due to the influence of the
speaker, and the sound quality is changed to the influence. The present invention has been made
in view of the above-described circumstances, and it is an object of the present invention to
reduce the change in the vibration characteristics of a soundboard even if a structure for
vibrating the soundboard is provided.
[0006]
In order to solve the above-mentioned problems, the present invention is a keyboard instrument
having a plurality of tone generation modes, one of the tone generation modes being set by the
user, and a key and a tone generation provided corresponding to the key. A body, a hammer
striking the sound producing body in response to the operation of the key, a stopper for
preventing the hammer from striking the sound producing body, a soundboard vibrating with the
vibration of the sound producing body, a main body portion And a vibrating portion connected to
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the soundboard, and generating at least one of an attractive force and a repulsive force between
the main body and the vibrating portion in response to the input drive signal. A vibrating portion
for vibrating the soundboard to vibrate, a supporting portion for supporting the main body
portion so that the load on the main body portion is not applied to the soundboard when at least
the sounding board is not vibrating, the key Performance information according to the operation
of The performance information output unit to output and the drive signal indicating the sound
based on the performance information are output to the excitation unit, and the drive signal is
output when the sound generation mode set by the user is a specific sound generation mode. A
signal output unit that does not output, and a blocking control unit that controls the stopper so
as not to block the striking when at least the set tone generation mode is the specific tone
generation mode. Provide a keyboard instrument to
[0007]
In a preferred aspect, the main body portion includes a magnet, and the vibrating portion
includes a voice coil disposed on a magnetic path formed by the magnet and to which the drive
signal is input.
[0008]
In another preferred embodiment, the main body portion and the vibration portion are separated
by a space, and the support portion supports the main body portion so that the main body
portion does not contact the sound board. It features.
[0009]
Further, in another preferable aspect, the main body portion and the vibrating portion are
connected via a damper portion, and the supporting portion is configured to load the vibrating
portion on the sound board in a state where the vibrating portion is not vibrating. The vibrating
portion is supported via the damper portion and the main body portion so as not to be damaged.
[0010]
Further, in another preferable aspect, the signal output unit includes an equalizer unit that
adjusts a frequency characteristic of the driving signal to be output.
[0011]
According to the present invention, even if the structure for vibrating the soundboard is
provided, it is possible to reduce the change in the vibration characteristics of the soundboard.
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[0012]
It is a perspective view showing the appearance of the grand piano in the embodiment of the
present invention.
It is a figure explaining the internal structure of the grand piano in embodiment of this invention.
It is a figure explaining the position of the excitation part in embodiment of this invention.
It is a figure explaining the external appearance of the vibration excitation part in embodiment of
this invention.
It is sectional drawing of the vibration excitation part seen from the arrow V-V direction shown in
FIG.
It is a block diagram showing composition of a controller in an embodiment of the present
invention.
It is a block diagram which shows the function structure of the grand piano in embodiment of
this invention. It is sectional drawing of the vibration excitation part in the modification 1 of this
invention. It is a figure which shows the internal structure of the upright piano in the
modification 2 of this invention. It is a figure explaining the position of the excitation part in the
modification 2 of this invention. It is a figure explaining the position of the excitation part in the
modification 3 of this invention. It is a figure which shows the internal structure of the upright
piano in the modification 3 of this invention. It is sectional drawing of the vibration excitation
part in the modification 6 of this invention. It is sectional drawing of the vibration excitation part
in the modification 9 of this invention.
[0013]
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Embodiment [Overall Configuration] FIG. 1 is a perspective view showing an appearance of a
grand piano 1 according to an embodiment of the present invention. The grand piano 1 is a
keyboard instrument having a plurality of keys 2 arranged on the front side of the keys 2 whose
performance operation is performed by the player, and a keyboard 3 having a pedal 3. Moreover,
the grand piano 1 has the control apparatus 10 which has the operation panel 13 in a front part,
and the touch panel 60 provided in the music stand part. The user's instruction can be input to
the control device 10 by operating the operation panel 13 and the touch panel 60.
[0014]
The grand piano 1 is capable of sounding in the sounding mode according to the user's
instruction among a plurality of sounding modes. In this sound generation mode, a normal sound
generation mode in which only a string by hammer is generated in the same manner as a general
grand piano, a string by hammer is blocked, and excitation is performed using a signal from a
sound source unit such as an electronic sound source. By vibrating the soundboard by the unit, it
is made to sound with a string similar to the operation of the low sound mode and the normal
sound generation mode to make a natural sound with a smaller sound (or a loud sound) than the
normal sound from the sound board. At the same time, by using the signal of the tone color of
the piano to excite the soundboard by the exciter, there is a strong sound mode in which the
player plays with a louder sound than when striking with a hammer (normal sound generation
mode). In this strong sound mode, not only the sound volume is increased, but also the sounding
board is generated by the excitation unit using the hammer to strike a string and using the tone
signal other than the piano (including the tone similar to the piano). It can also be used as a
performance mode to obtain timbre layer effects by simultaneously performing excitation and
sounding. Note that as the sound generation mode, other sound generation modes such as a mute
mode that does not cause external sound generation by supplying the signal from the sound
source unit to the headphone terminal instead of using the signal from the sound source unit for
excitation in the configuration of low sound mode It may exist. The sound generation modes are
arranged as shown in Table 1 below.
[0015]
[0016]
Further, in the grand piano 1, among the plurality of performance modes, operation in the
performance mode according to the instruction of the user is possible.
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The performance mode includes a normal performance mode in which a user performs a
performance operation to cause a sound and an automatic performance mode in which a key is
automatically driven to generate a sound. Note that one of the performance modes may not exist.
[0017]
[Configuration of Grand Piano 1] FIG. 2 is a view for explaining the internal structure of the
grand piano 1 according to the embodiment of the present invention. In this figure, the
configuration provided corresponding to each key 2 is shown paying attention to one key 2 and
the description of the portions provided corresponding to the other keys 2 is omitted. There is.
[0018]
At the bottom of the rear end side of each key 2 (the back side of the key 2 as viewed from the
user who plays) the key driving unit 30 for driving the key 2 using a solenoid when the
performance mode is the automatic performance mode. It is provided. The key drive unit 30
drives the solenoid according to the control signal from the control device 10. The key driving
unit 30 reproduces the same state as when the user depresses the key by driving the solenoid to
raise the plunger, while the same state as when the user releases the key by lowering the
plunger. Reproduce As described above, the difference between the normal performance mode
and the automatic performance mode is whether the key 2 is operated by the user or the key
driving unit 30.
[0019]
The hammer 4 is provided corresponding to each key 2, and when the key 2 is depressed, a force
is transmitted via an action mechanism (not shown) to move and strike the strings 5
corresponding to each key 2. The damper 8 does not contact or contact the string 5 in
accordance with the depression amount of the key 2 and the depression amount of the damper
pedal of the pedal 3 (hereinafter referred to simply as the damper pedal in the case of simply
referring to the pedal 3). . The damper 8 suppresses the vibration of the string 5 when in contact
with the string 5.
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[0020]
The stopper 40 is a member that prevents the hammer 4 from striking the string 5 when the low
sound mode is set. That is, when the sound generation mode is set to the low sound mode, the
hammer shank collides with the stopper 40 to prevent the hammer 4 from striking the string 5
while the normal sound generation mode is set to the stopper 40. , To move to a position that
does not collide with the hammer shank.
[0021]
The key sensor 22 is provided below each key 2 and outputs a detection signal corresponding to
the behavior of the key 2 to the control device 10. In this example, the key sensor 22 detects the
pressing amount of the key 2 and outputs a detection signal indicating the detection result to the
control device 10. The key sensor 22 may output a detection signal indicating that the key 2 has
passed a specific pressing position, instead of outputting a detection signal corresponding to the
pressing amount of the key 2. The specific pressed position is any position in the range from the
rest position of the key 2 to the end position, and it is desirable that the specific pressed position
is a plurality of positions. Thus, the detection signal output from the key sensor 22 may be any
signal as long as the control device 10 can recognize the behavior of the key 2.
[0022]
The hammer sensor 24 is provided corresponding to each hammer 4, and outputs a detection
signal corresponding to the behavior of the hammer 4 to the control device 10. In this example,
the hammer sensor 24 detects the moving speed immediately before striking the string 5 by the
hammer 4 and outputs a detection signal indicating the detection result to the control device 10.
The detection signal may not indicate the moving speed of the hammer 4 itself, and the moving
speed may be calculated in the control device 10 as a detection signal in another mode. For
example, detection signals indicating that the hammer shank has passed may be output at two
positions where the hammer shank passes while the hammer 4 is moving, or one position may be
passed before the other position. A detection signal may be output indicating the time until
passing through. Thus, the detection signal output from the hammer sensor 24 may be any signal
as long as the controller 10 can recognize the behavior of the hammer 4.
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[0023]
The pedal sensor 23 is provided corresponding to each pedal 3, and outputs a detection signal
corresponding to the behavior of the pedal 3 to the control device 10. In this example, the
depression amount of the pedal 3 is detected, and a detection signal indicating the detection
result is output to the control device 10. The pedal sensor 23 may output a detection signal
indicating that the pedal 3 has passed a specific depression position, instead of outputting a
detection signal corresponding to the depression amount of the pedal 3. The specific stepping
position is any position in the range from the rest position of the pedal to the end position, and is
a stepping position which can distinguish between the state in which the damper 8 and the string
5 completely contact and the state in which the damper 5 does not contact. It is more desirable
to make it possible to detect the state of the half pedal by setting a plurality of locations to
specific stepping positions. Thus, the detection signal output from the pedal sensor 23 may be
any signal as long as the control device 10 can recognize the behavior of the pedal 3.
[0024]
Note that the control device 10 detects the striking timing (key-on timing) of the hammer 4 on
the string 5, the striking speed (velocity), and the string according to the detection signals output
from the key sensor 22, the pedal sensor 23 and the hammer sensor 24. If the vibration
suppression timing (key-off timing) of the damper 8 with respect to 5 can be specified according
to each key 2 (key number), the key sensor 22, the pedal sensor 23, and the hammer sensor 24
The result of detecting the behavior of the key 2, the pedal 3 and the hammer 4 may be output
as a detection signal in another mode.
[0025]
The sounding board 7 is connected to the sounding bar 75 and the piece 6 and transmits the
vibration of the sounding board 7 to each string 5 through the piece 6 and the vibration of each
string 5 to the sounding board 7 through the piece 6 Be done.
In addition, an excitation unit 50 is connected to the soundboard 7. The vibration unit 50
includes a vibration unit 51 connected to the soundboard 7 and a yoke holding unit 52 (main
unit) supported by the support unit 55 connected to the straight support 9. A drive signal is
input to the excitation unit 50 from the control device 10. The vibration unit 51 vibrates
according to the waveform indicated by the input drive signal to excite the soundboard 7. As a
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result, the piece 6 is also excited. In this example, the vibration unit 51 has a voice coil 512
arranged to be positioned in the magnetic path formed by the yokes 521 and 523 of the yoke
holding unit 52 and the magnet 522, and is input to the voice coil 512. Vibrate according to the
drive signal (see FIG. 5).
[0026]
FIG. 3 is a view for explaining the position of the excitation unit 50 in the embodiment of the
present invention. In this example, two vibrating units 50H and 50L are provided as the vibrating
unit 50. Hereinafter, when it is not necessary to distinguish the excitation units 50H and 50L
from each other in particular, they will be simply referred to as the excitation unit 50.
[0027]
The excitation unit 50 is connected between a plurality of sound rods 75 among the soundboards
7. The excitation unit 50H is provided at a position corresponding to the piece 6H among the two
pieces 6 (pieces 6H (long pieces) and 6L (short pieces)). On the other hand, the excitation unit
50L is provided at a position corresponding to the piece 6L. That is, the soundboard 7 is in a
state of being sandwiched between the excitation unit 50 and the piece 6. The number of the
excitation units 50 provided in the soundboard 7 is not limited to two, and may be more, or only
one may be provided. In the case where the number of the excitation units 50 is one while the
number of the pieces 6 is two, it is desirable that the excitation unit 50 be provided on the long
piece 6H.
[0028]
The piece 6H is a piece supporting the high-pitched string 5 and the piece 6L is a piece
supporting the low-pitched string 5. Hereinafter, when it is not necessary to distinguish the
pieces 6H and 6L from each other in particular, they are simply referred to as the pieces 6.
Further, as described above, the excitation unit 50 is supported by the support 55 connected to
the straight support 9. Subsequently, the configuration of the excitation unit 50 will be described.
[0029]
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[Configuration of Excitation Unit 50] FIG. 4 is a view for explaining the appearance of the
excitation unit 50 in the embodiment of the present invention. In this figure, in order to make the
main structure of the yoke holding part 52 legible, description is abbreviate ¦ omitted about the
housing ¦ casing 524 (refer FIG. 5) of the yoke holding part 52, and the inside of the housing 524
is shown in figure. The vibrating portion 51 has a cylindrical connection member 511 and a
voice coil 512 whose upper surface connected to the soundboard 7 is closed. The connection
member 511 is formed of a light material such as a resin such as polyimide or a metal such as an
aluminum material, and a cap such as a resin is attached to the upper surface portion. The yoke
holding portion 52 has a magnet 522 and yokes 521 and 523 sandwiching the magnet 522. The
yokes 521 and 523 are made of, for example, a soft magnetic material such as soft iron, and are
very heavy compared to the connection member 511. In addition, the vibrating portion 51 and
the yoke holding portion 52 are separated by a space.
[0030]
FIG. 5 is a horizontal cross-sectional view of a cross section obtained by cutting the excitation
unit 50 shown in FIG. 4 along a vertical plane passing through the center of the connection
member 511. In FIG. 5, a case 524 whose description is omitted in FIG. 4 is also described.
Moreover, in FIG. 5, in order to show the positional relationship of the excitation part 50, the
soundboard 7, and the piece 6, the position of the soundboard 7 and the piece 6 is shown with
the broken line. The vibrating unit 51 has a connection member 511 and a voice coil 512. Voice
coil 512 is disposed on the magnetic path passing through the space formed between yoke 521
and yoke 523 among the magnetic paths (broken line arrows) formed by yokes 521 and 523 and
magnet 522. ing. The drive signal input to the vibration unit 50 is input to the voice coil 512. In
response to the magnetic force in the magnetic path formed as described above, the voice coil
512 generates a driving force so that the connecting member 511 vibrates in the vertical
direction in the figure according to the waveform indicated by the input drive signal. . At this
time, since the yoke holding portion 52 is supported by the support portion 55 and its position is
fixed, most of the driving force generated by the voice coil 512 is used as a thrust for the
vibration of the connection member 511. Be
[0031]
The upper surface of the connecting member 511 and the sounding board 7 are adhered by an
adhesive, a double-sided tape (not shown) or the like, and the connecting member 511 is fixed to
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the sounding board 7. The upper surface of the connection member 511 and the sounding plate
7 are not limited to being connected to each other by adhesion, and may be connected by
screwing or the like. Thereby, the sounding board 7 is pushed upward when the connection
member 511 moves upward, and when the connection member 511 moves downward, the
connection member 511 does not separate, but is moved downward by the connection member
511. It will be pulled by. Thus, the vibration in the connecting member 511 is applied to the
piece 6 through the soundboard 7 and further transmitted to the string 5.
[0032]
Also, the housing 524 accommodates the yokes 521 and 523 and the magnet 522. In addition,
the housing 524 is supported by the support portion 55. At this time, the yoke holding portion
52 constituted by the yokes 521 and 523, the magnet 522 and the housing 524 is supported by
the supporting portion 55 at a position separated from the vibrating portion 51 by a space and
not in contact with the soundboard 7. Be supported. As shown in FIG. 5, in this example, the
support portion 55 supports the yoke holding portion 52 from the lower surface side of the
housing 524. Further, since the vibrating portion 51 (connection member 511) is separated from
the yoke holding portion 52 by a space, the vibrating portion 51 (connection member 511) is
supported by the sounding board 7 by being connected to the sounding board 7.
[0033]
The fact that the vibrating portion 51 and the yoke holding portion 52 are separated by a space
means that they are not in contact with each other in the illustrated configuration, and some of
the portions connected to the vibrating portion 51. A configuration (for example, wiring to the
voice coil 512) may be in contact with the yoke holder 52. At this time, it is preferable that a load
due to gravity or the like of the yoke holding portion 52 is not applied to the vibrating portion 51
due to the configuration of a part thereof.
[0034]
By supporting the yoke holding portion 52 of the vibrating portion 50 in this manner by the
support portion 55, no load other than the vibrating portion 51 of the vibrating portion 50 is
applied to the soundboard 7 There is. The mode in which the support portion 55 supports the
yoke holding portion 52 is any mode as long as no load other than the vibrating portion 51 of
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the vibrating portion 50 is applied to the sounding board 7. May be
[0035]
Here, the connecting member 511 is formed of a lighter material such as resin than each
member constituting the yoke holding portion 52. In addition, the entire vibration unit 51
including the voice coil 512 is also very light in comparison with the yoke holding unit 52. Since
the load such as gravity of the yoke holding portion 52 is applied to the straight support 9 by the
support portion 55, most of the load of the excitation portion 50 is not applied to the
soundboard 7. Although the load on the vibrating portion 51 is applied to the sound board 7, the
load on the sound portion 7 is small, and therefore the influence on the vibration characteristics
of the sound board 7 is very small. The above is the description of the excitation unit 50.
Subsequently, the configuration of the control device 10 will be described.
[0036]
[Configuration of Control Device 10] FIG. 6 is a block diagram showing a configuration of the
control device 10 in the embodiment of the present invention. The control device 10 includes a
control unit 11, a storage unit 12, an operation panel 13, a communication unit 14, a signal
output unit 15, and an interface 16. Each of these configurations is connected via a bus. The
control unit 11 includes an arithmetic device such as a central processing unit (CPU), a storage
device such as a read only memory (ROM), and a random access memory (RAM). The control unit
11 controls each component connected to each unit of the control device 10 and the interface 16
based on a control program stored in the recording device. In this example, the control unit 11
causes the control device 10 and a part of the configuration connected to the control device 10
to function as the keyboard instrument of the present invention by executing the control
program.
[0037]
The storage unit 12 stores setting information indicating various setting contents used when the
control program is being executed. The setting information is, for example, information for
determining the content of the drive signal output from the signal output unit 15 based on
detection signals output from the key sensor 22, the pedal sensor 23, and the hammer sensor 24.
The setting information also includes information indicating a sound generation mode, a
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performance mode, and the like set by the user.
[0038]
The operation panel 13 has an operation button or the like for receiving an operation of the user.
When the user's operation is accepted by the operation button, an operation signal
corresponding to the operation is output to the control unit 11. The touch panel 60 connected to
the interface 16 has a display screen such as a liquid crystal display, and a touch sensor that
receives a user's operation is provided on the surface portion of the display screen. On this
display screen, a setting change screen for changing the contents of setting information stored in
the storage unit 12 under the control of the control unit 11 via the interface 16, a setting screen
for setting various modes, a score, etc. Various information is displayed. Also, when the user's
operation is accepted by the touch sensor, an operation signal corresponding to the operation is
output to the control unit 11 via the interface 16. An instruction from the user to the control
device 10 is input by an operation accepted by the operation panel 13 and the touch panel 60.
[0039]
The communication unit 14 is an interface that communicates with another device by wireless,
wired, or the like. This interface may be connected to a disk drive that reads various data
recorded on a recording medium such as a DVD (Digital Versatile Disk) or a CD (Compact Disk)
and outputs the read data. The data input to the control device 10 via the communication unit 14
is, for example, music data used for automatic performance.
[0040]
The signal output unit 15 includes a sound source unit 151 that outputs an acoustic signal, an
equalizer unit 152 that adjusts the frequency characteristic of the acoustic signal, and an
amplification unit 153 that amplifies the acoustic signal (see FIG. 7). The signal output unit 15
outputs an acoustic signal whose frequency characteristic has been adjusted and amplified as a
drive signal.
[0041]
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The interface 16 is an interface that connects the control device 10 to each external
configuration. The components connected to the interface 16 are, in this example, a key sensor
22, a pedal sensor 23, a hammer sensor 24, a key drive unit 30, a stopper 40, an excitation unit
50, and a touch panel 60. The interface 16 outputs the key sensor 22, the pedal sensor 23, a
detection signal output from the hammer sensor 24, and an operation signal output from the
touch panel 60 to the control unit 11. Further, the interface 16 outputs the control signal output
from the control unit 11 to the key driving unit 30, and outputs the drive signal output from the
signal output unit 15 to the vibration unit 50. Subsequently, a configuration that functions by
executing the control program by the control unit 11 will be described.
[0042]
[Functional Configuration of Grand Piano 1] FIG. 7 is a block diagram showing a functional
configuration of the grand piano 1 according to the embodiment of the present invention. As
shown in FIG. 7, when the key 2 is operated, the hammer 4 strikes the string 5 and the string 5
vibrates. This vibration is transmitted to the soundboard 7 via the piece 6. Further, the damper 8
is operated by the operation of the key 2 and the operation of the pedal 3. The operation of the
damper 8 changes the suppression state of the vibration of the string 5.
[0043]
The setting unit 110 is realized by the touch panel 60 and the control unit 11 as a configuration
having the following functions. First, the touch panel 60 receives an operation of the user who
sets the sound generation mode. The control unit 11 changes the setting information according
to the performance mode and the sound generation mode set by the user, and the sound
generation mode selected for the performance information output unit 120 and the blocking
control unit 130 according to these modes. It outputs the control signal shown.
[0044]
Further, the touch panel 60 receives an operation of the user for setting various control
parameters in the signal output unit 15. The various control parameters are parameters for
determining the timbre of the musical tone indicated by the sound signal output from the sound
source unit 151, the adjustment mode of the frequency characteristic in the equalizer unit 152,
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the amplification factor in the amplification unit 153, and the like.
[0045]
A configuration may be adopted in which the user individually sets each control parameter, or
the user selects one preset data from among a plurality of preset data in which the values of each
control parameter stored in advance in storage unit 12 are determined. A configuration may be
employed to set control parameters. The control unit 11 changes the setting information
according to various control parameters set by the user, and controls the drive signal output
from the signal output unit 15 by these control parameters. Note that the equalizer unit 152 and
the amplification unit 153 may use a configuration in which only parameters set in advance are
used and the parameter change by the control unit 11 is not performed.
[0046]
The performance information output unit 120 is realized by the control unit 11, the key sensor
22, the pedal sensor 23, and the hammer sensor 24 as a configuration having the following
functions. The behavior of the key 2, the pedal 3 and the hammer 4 is detected by the key sensor
22, the pedal sensor 23 and the hammer sensor 24 respectively, and the control unit 11 detects
the behavior of the string 5 by the hammer 4. The sound source section includes the impact
timing (key on timing), the key 2 number (key number) corresponding to the struck string 5, the
impact speed (velocity), and the vibration suppression timing (key off timing) of the damper 8
with respect to the string 5 It specifies as information (performance information) used in 151. In
this example, the control unit 11 identifies the striking timing and the key 2 number from the
behavior of the key 2, identifies the striking speed from the behavior of the hammer 4, and the
vibration suppression timing includes the key 2 and the pedal 3. Identify from the behavior of
The hitting timing may be specified from the behavior of the hammer 4 or the hitting speed may
be specified from the behavior of the key 2. The performance information may be indicated by,
for example, a control parameter of MIDI (Musical Instrument Digital Interface) format.
[0047]
The control unit 11 outputs, to the sound source unit 151, performance information indicating
the key number, the velocity, and the key on at the specified key on timing. Further, the control
unit 11 outputs, to the sound source unit 151, performance information indicating the key
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number and the key off at the key off timing. The control unit 11 realizes the above function
when the sound generation mode set by the user is the low sound mode or the high sound mode,
while the sound source of the performance information in this example when the normal sound
generation mode is performed. No output to the unit 151 is performed. In the case of the normal
sound generation mode, the drive signal may not be output from the signal output unit 15.
Therefore, even if the configuration is such that the performance information is output, the drive
signal from the signal output unit 15 is The control unit 11 may control so as not to output.
[0048]
The blocking control unit 130 is realized by the control unit 11 as a configuration having the
following functions. When the tone generation mode set by the user is the low tone mode, the
control unit 11 moves the stopper 40 to a position at which the hammer 4 does not hit the string
5 while the normal tone mode or the high tone mode is set. If it is, the stopper 40 is moved to a
position where it does not block the hammer 4 hitting the string 5.
[0049]
The sound source unit 151 outputs an acoustic signal based on the performance information
output from the performance information output unit 120 (control unit 11). For example, the
sound source unit 151 outputs an acoustic signal such that the volume corresponds to the pitch
corresponding to the key number and the velocity. As described above, this acoustic signal is
adjusted in frequency characteristics by the equalizer unit 152, amplified by the amplification
unit 153, and output as a drive signal to the excitation unit 50.
[0050]
As described above, the vibration unit 50 vibrates according to the input drive signal, and
vibrates the piece 6 through the soundboard 7. Thereby, the vibration applied to the piece 6 is
also transmitted to the string 5. The above is the description of the functional configuration of
the grand piano 1.
[0051]
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[Operation Example] Subsequently, an operation example of the grand piano 1 according to the
embodiment of the present invention will be described. First, the user operates the touch panel
60 to set the performance mode as the normal performance mode and set the sound generation
mode as the low sound mode. In this state, when the user operates the key 2 to play, the hammer
40 prevents the hammer 5 from hitting the string 5 while the exciter 50 excites the soundboard
7 and the sound is emitted from the soundboard 7. Be done. Further, by vibrating the piece 6
through the soundboard 7, the string 5 whose vibration is not suppressed by the damper 8 also
vibrates, and sound generation similar to that of the acoustic piano is performed. At this time,
since the impact of the string 5 by the hammer 4 is blocked by the stopper 40, there is no sound
generation by the string. Therefore, by adjusting the amplitude of the vibration of the excitation
unit 50, the sound effect by the vibration of the soundboard 7 and the resonance of the strings is
used as in the acoustic piano at a volume (or a large volume) smaller than the sound generation
by the strike string. Can be pronounced.
[0052]
On the other hand, when the user operates the touch panel 60 and sets the sound generation
mode as the normal sound generation mode, no vibration is performed by the vibration unit 50,
and the hammer 4 does not block the strike of the string 5; Become. Therefore, the sound
generation by the stringing is performed, and the vibration of the string 5 is transmitted to the
soundboard 7 through the piece 6. The soundboard 7 emits a sound according to the vibration
transmitted from the string 5. At this time, since only the load of the very light portion of the
vibrating portion 50 of the vibrating portion 50 is applied to the sounding board 7, the vibrating
portion 50 almost affects the vibration characteristics of the sounding board 7 itself. However,
the player can play without losing the acoustic performance of the original acoustic piano.
[0053]
When the user operates the touch panel 60 to set the sound generation mode as the strong
sound mode, the excitation to the soundboard 7 by the excitation unit 50 and the impact on the
string 5 by the hammer 4 are simultaneously performed. It will be. Therefore, the soundboard 7
radiates a sound by the vibration to which the vibration of the string 5 by the string sent via the
piece 6 and the vibration by the vibration from the vibration unit 50 are added. In addition, the
string 5 struck by the hammer 4 radiates sound by vibration, and the string 5 whose vibration is
not suppressed by the damper 8 vibrates according to the vibration of the soundboard 7 through
the piece 6 to generate resonance sound. It emits. Therefore, the player can play with the sound
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naturally mixed with the sound of the original acoustic piano and the sound indicated by the
sound signal output from the sound source unit 151.
[0054]
Although the embodiments of the present invention have been described above, the present
invention can be implemented in various modes as follows. [Modification 1] In the embodiment
described above, the vibrating portion 51 (connection member 511) is separated from the yoke
holding portion 52 by a space, but is indirectly connected to the yoke holding portion 52
(housing 524). May be
[0055]
FIG. 8 is a cross-sectional view of the vibration excitation unit 50A according to the first
modification of the present invention. The excitation unit 50A in this example includes a damper
unit 53 that connects the connection member 511 and the housing 524. The damper 53 follows
the vertical vibration of the connecting member 511 from the standard position where the voice
coil 512 is not driven by the drive signal and the connecting member 511 does not apply a force
to the sound board 7. In this example, with the connection member 511 not yet connected to the
soundboard 7 and supported by only the damper portion 53, the height at which the upper
surface of the connection member 511 at the standard position just contacts the lower surface of
the soundboard 7 The height of attachment of the excitation unit 50 with respect to the support
55 is adjusted. Then, the upper surface of the connection member 511 and the lower surface of
the soundboard 7 are connected in this state. Therefore, the weight of the vibration unit 50 does
not fall on the soundboard 7 at the standard position. Further, although the damper portion 53
can support the lightweight vibration portion 51, since the damper portion 53 has high
extensibility, the weight of the yoke holding portion 52 can be applied to the vibration portion 51
via the damper portion 53 when the soundboard 7 vibrates. There is almost no transmission, and
almost no influence on the vibration characteristics of the soundboard 7. Further, since the
positional relationship between the vibrating portion 51 and the yoke holding portion 52 is
maintained by the presence of the damper portion 53, the operation when connecting the
vibrating portion 50 to the soundboard 7 is facilitated.
[0056]
[Modification 2] In the embodiment described above, an example using the grand piano 1 as a
keyboard instrument has been described, but an upright piano may be used.
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[0057]
FIG. 9 is a view showing an internal structure of the upright piano 1B in the second modification
of the present invention.
In FIG. 9, to each component of the upright piano 1B, a symbol obtained by adding B to a
symbol corresponding to each component of the grand piano 1 in the embodiment is attached.
Also in the case of the upright piano 1B, the vibrating portion 51B in the vibrating portion 50B is
connected to the soundboard 7B, and the yoke holding portion 52B is supported by the support
portion 55B connected to the straight support 9B.
[0058]
FIG. 10 is a view for explaining the position of the excitation unit 50B in the second modification
of the present invention. Also in this example, as in the embodiment, the excitation unit 50B is
connected between the sounding rods 75B among the sounding boards 7B. Further, the
excitation unit 50B is provided at a position corresponding to the piece 6B (in other words, the
back surface of the position at which the piece 6B of the soundboard 7B is attached). Moreover,
in the example shown in FIG. 10, although the support part 55B is connected to several straight
support ¦ pillar 9B, you may be connected to one straight support ¦ pillar 9B. Although the
position where the excitation unit 50B is provided is the position corresponding to the long piece
among the pieces 6B, it may be the position corresponding to the short piece (not shown). In
addition, it may be provided at a position corresponding to each of the long piece and the short
piece.
[0059]
[Modification 3] In the above-described embodiment and its modification, the excitation unit is
provided at a position corresponding to the piece in the soundboard, but may be a position apart
from the piece.
[0060]
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FIG. 11 is a view showing an example in which the upright piano 1B according to the second
modification shown in FIG. 9 is modified, and the excitation unit 50B is disposed at a position
away from the piece 6B of the soundboard 7B.
In the example shown in FIG. 11, the two excitation units 50B are disposed at positions (back
side of the sounding board 7B in FIG. 11) opposite to the sounding bar 75B with the sounding
board 7B interposed therebetween.
[0061]
FIG. 12 is a view showing how the excitation unit 50B shown in FIG. 11 is supported by the
support unit 55B. As shown in FIG. 12, the supporting portion 55B of this modification is formed
by bending a plate made of stainless steel or the like at two different longitudinal directions
along the lines perpendicular to the longitudinal direction by 90 degrees in opposite directions.
There is. The flat portion constituting one end of the support portion 55B is attached to the back
surface of the shelf plate 90 of the upright piano 1B by screwing or the like. The yoke holding
part 52B of the vibration excitation part 50B is attached to the plane part which comprises one
end part of the support part 55B. The yoke holding portion 52B is disposed at a position facing
the sounding rod 75B with the sounding plate 7B interposed therebetween, and accommodates
the vibrating portion 51B connected to the sounding plate 7B at that position.
[0062]
Even in the configuration in which the excitation unit is connected to the soundboard at the
position corresponding to the live bar instead of the piece as in the above example, the excitation
by the exciter is efficiently transmitted to the entire soundboard by the live rod. The desired
sound may be emitted by the soundboard.
[0063]
Also, attach a vibrating rod, which is a rod-like member different from the sounding rod, on the
surface of the soundboard opposite to the sounding rod, for example, and place the vibrating
portion at a position opposite to the vibrating rod with the sounding plate interposed.
Arrangements for deployment may be employed.
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In this case, since the exciter can be designed separately from the existing bridge and the
sounding bar, the exciter may be designed so that the sound of desired acoustic characteristics is
emitted from the soundboard according to the excitation of the exciter. It is desirable that the
shape, size, arrangement position, etc. of the
[0064]
[Modification 4] In the embodiment described above, although the yoke holding portion 52
generates the magnetic force using the magnet 522, the configuration that can control the
presence or absence of the generation of the magnetic force such as an electromagnet is not used
to vibrate the vibrating portion 51. When the sound generation mode is the normal sound
generation mode, for example, the generation of the magnetic force may be stopped.
[0065]
[Modification 5] In the embodiment described above, the same drive signal is input to the
plurality of excitation units 50, but a different drive signal may be input to each excitation unit
50.
For example, the sound source unit 151 outputs an acoustic signal corresponding to each of the
excitation units 50, and performs adjustment of the frequency characteristic in the equalizer unit
152 and amplification in the amplification unit 153 individually for each of the acoustic signals.
You may In this way, it is possible to set the adjustment mode of the frequency characteristic and
the setting of the parameter of the amplification factor as different parameters for each of the
excitation units 50. For example, if the vibration characteristic has a resonance peak at a specific
frequency at the position of the soundboard 7 provided with one excitation unit 50, the output
level of the drive signal is lowered at that specific frequency. The frequency characteristics may
be set to be adjusted. Then, the drive signal whose frequency characteristic has been adjusted
may be output to the excitation unit 50.
[0066]
The plurality of acoustic signals output from the sound source unit 151 may also be different
signals. For example, when two excitation units 50 are used, the acoustic signals corresponding
to each may be an acoustic signal for Lch and an acoustic signal for Rch, or may be acoustic
signals indicating tones of different tones. In addition, each acoustic signal may be different in
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frequency band. In this case, an acoustic signal having a higher frequency band may be output to
the excitation unit 50H, and an acoustic signal having a lower frequency band may be output to
the excitation unit 50L.
[0067]
[Modification 6] In the above-described embodiment, the excitation unit 50 includes the vibration
unit 51 and the yoke holding unit 52, and is realized by a configuration close to a dynamic type
speaker using a voice coil. The configuration of the excitation unit according to the invention is
not limited to the configuration similar to that of the dynamic type speaker. And at least one of
an attractive force and a repulsive force according to the drive signal between the main body
portion and the vibration portion. Any other configuration may be employed as long as the
configuration produces FIG. 13 is a view showing an example of an excitation unit according to
the present invention which is not similar to a dynamic type speaker. The excitation unit 80
according to this modification includes a magnetic sheet 81 (vibration unit) which is a sheet-like
ferromagnetic material attached to the soundboard 7 and an electromagnet 82 (main unit)
supported by the support unit 55. Have. The electromagnet 82 has a core 821 which is a
columnar magnetic material, and a coil 822 which is an electric wire spirally wound around the
core 821, and a magnetic force whose strength and polarity change according to a drive signal
input from the control device 10. Generate
[0068]
The magnetic material sheet 81 excites the sounding board 7 by the attractive force and the
repulsive force generated by the magnetic force generated from the electromagnet 82. It is
preferable that the magnetic material sheet 81 be a ferromagnetic material that can obtain not
only the attractive force generated in the direction toward the electromagnet 82 by the magnetic
force generated by the electromagnet 82 but also the repulsive force generated in the direction
away from the electromagnet 82. It may be a body or a diamagnetic substance. In that case, the
soundboard 7 receives a force only in one direction by the magnetic sheet 81 in the direction
toward the electromagnet 82 (in the case of paramagnetic material) or in the direction away from
the electromagnet 82 (in the case of diamagnetic material). The magnetic material sheet 81
receives a force and moves from the steady position, and when it is released from the force from
the magnetic material sheet 81, as a result of moving toward the steady position by the restoring
force, it vibrates.
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[0069]
The weight of the light weight magnetic material sheet 81 of the vibrating portion 80 only rests
on the soundboard 7 by the vibrating portion 80, and the weight of the electromagnet 82 which
occupies most of the weight of the vibrating portion 80 is supported by the support portion 55
Since the soundboard 7 is not applied to the soundboard 7, the vibration unit 80 hardly affects
the vibration characteristics of the soundboard 7 itself.
[0070]
[Modification 7] In the embodiment described above, the support 55 supports the vibration
excitation unit 50 in the state of being connected to the straight support 9, but in the state of
being connected to a place other than the straight support 9. It may be.
For example, the support portion 55 may support the excitation portion 50 in a state of being
connected to a side plate, a leg or the like of the grand piano 1. In addition, even if the support
portion 55 is connected to a portion different from the grand piano 1, for example, a structure
(floor, wall, etc.) of a room in which the grand piano 1 is installed, the support portion 55 may
support the vibration excitation portion 50. Good.
[0071]
[Modification 8] The control program in the embodiment described above is a computer readable
recording medium such as a magnetic recording medium (magnetic tape, magnetic disk, etc.), an
optical recording medium (optical disc, etc.), a magneto-optical recording medium, a
semiconductor memory, etc. It can be provided in a stored state. Also, the grand piano 1 may
download the control program via the network.
[0072]
[Modification 9] In the embodiment described above, a cylindrical shape having a diameter
substantially the same as the diameter of the voice coil 512 is adopted as the shape of the
connection member 511, but the shape of the connection member 511 is limited to this. Absent.
FIG. 14 is a view showing an example of an excitation unit according to the present invention
having a connecting member 511 having a non-cylindrical shape. The connecting member 511
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of the excitation unit 50 shown in FIG. 14 has a hollow cylindrical main body 5111 whose upper
surface is closed and whose lower surface is open, and the lower surface of the main body 5111
extends upward from the center of the upper surface. It has a cylindrical support rod 5112
attached to the top surface of the portion 5111. The upper surface of the support rod 5112 is
connected to the lower surface of the soundboard 7, and the upper surface of the support rod
5112 excites the soundboard 7.
[0073]
According to the excitation unit 50 having the connection member 511 having the shape shown
in FIG. 14, for example, the sound rod 75 may be provided near a desired position (for example, a
position according to the piece 6) on the sounding board 7 where the excitation unit 50 is to be
disposed. Even if the shape of the connecting member 511 according to the above-described
embodiment interferes with the sounding rod 75, the connection to the sounding plate 7 as long
as the support rod 5112 does not interfere with the sounding rod 75. The connection of the
members 511 can be made.
[0074]
Modified Example 10 In the embodiment and the modified example described above, a piano is
adopted as an example of a keyboard percussion instrument.
The present invention can also be applied to, for example, keyboard percussions other than
pianos such as a celesta having a sound board made of metal as a sounding body instead of a
string.
[0075]
DESCRIPTION OF SYMBOLS 1 ... Grand piano, 1B ... Upright piano, 2, 2B ... Key, 3, 3B ... Pedal, 4,
4B ... Hammer, 5, 5B ... String, 6, 6B, 6H, 6L ... piece, 7, 7B ... sound Board, 8, 8B: Damper, 9:
Direct support, 9B: Direct support, 10: Control device, 11: Control unit, 12: Storage unit, 13:
Operation panel, 14: Communication unit, 15: Signal output unit, 16 ... interface 22, 22 B ... key
sensor 23, 23 B ... pedal sensor 24, 24 B ... hammer sensor 30, 30 B ... key drive unit 40, 40 B ...
stopper, 50, 50 A, 50 B, 50 H, 50 L ... excitation Parts, 51, 51B: vibration part, 511: connection
member, 512: voice coil, 52, 52B: yoke holding part, 521, 523: yoke, 522: magnet, 524: housing,
53: damper part, 55, 55B ... Support 60 ... panel, 75,75B ... Hibikibo, 90 ... shelf board, 110 ...
setting unit, 120 ... performance information output unit, 130 ... blocking control unit, 151 ...
sound source unit, 152 ... equalizer, 153 ... amplifier unit
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