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JPH09160560

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JPH09160560
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker device used in an electronic keyboard instrument such as an electronic piano.
[0002]
2. Description of the Related Art Conventionally, as an electronic keyboard instrument, for
example, the one shown in FIG. 5 has been known. That is, this electronic keyboard instrument is
provided with the bass speakers 61, 61 and the mid to high pitch speakers 66, 66. The low
frequency speaker 61 is attached to a speaker box 62 provided below the shelf board 52, and a
saran net is provided on the front surface. On the other hand, the middle to high-pitched sound
speaker 66 is attached so as to be fitted into a mounting hole provided on the upper front plate
57, and a saran net is provided on the front surface.
[0003]
In such an electronic keyboard instrument, when the player tries to adjust the sound quality and
the spread of the sound, the adjustment is performed by operating switches. For example, if the
sound quality is selected from bright, mellow, etc., the electric circuit can make it bright and dark
by the electric circuit, and the spread of the sound can be adjusted by adding a reverb.
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[0004]
However, in the conventional electronic keyboard musical instrument, it is only possible to
change the tone quality and the sense of sound spread by the electric circuit, and these effects
can be changed by other means. It was not. For this reason, even if the player tries to change the
sound quality or the spread of the sound according to his / her preference or the condition of the
room, the range that can be changed is limited.
[0005]
The present invention has been made in view of the above problems, and it is an object of the
present invention to provide a speaker device of an electronic keyboard instrument capable of
adjusting the sound quality and the feeling of expansion that can not be adjusted by the electric
circuit.
[0006]
SUMMARY OF THE INVENTION In order to solve the above problems, the invention according to
claim 1 is a speaker device of an electronic keyboard instrument, which is a top plate capable of
opening and closing an upper opening of the electronic keyboard instrument. And an angle
adjusting mechanism for adjusting an angle when the top plate is opened, and a speaker
arranged such that sound is emitted to the outside through a gap generated in the upper opening
by opening the top plate. It is characterized by
[0007]
As an angle adjustment mechanism of this speaker device, for example, it is possible to use a
hinge type mechanism which can rotate when applied with an external force without rotating the
shaft depending on the weight of the top plate, in this case Can adjust the angle of the top plate
steplessly.
Alternatively, it is possible to use a mechanism in which a stick is provided on the periphery of
the upper opening of the electronic keyboard instrument and the top board of an appropriate
angle is supported by this stick, in which case the angle of the top plate is stepped. It can be
adjusted.
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Alternatively, it is possible to use a well-known angle adjustment mechanism (such as one using a
damper or one using a meshing cam) known in the prior art.
[0008]
The speaker may be a full range speaker or a bass speaker, but is preferably a treble speaker.
This is because the change in the sound quality and the sense of the spread of the sound due to
the reflection and the like is large because the high-pitch range has higher directivity. Also, the
speaker may be arranged so that all of the sound emitted from the speaker comes out through
the gap, for example, the upper front plate is provided with a sound emission hole, and the sound
is also emitted from this sound emission hole. You may arrange so that it may come out outside.
[0009]
In this speaker device, the size of the gap generated in the upper opening of the electronic
keyboard instrument changes depending on the angle when the top plate is opened. However,
the speaker emits sound to the outside through this gap, so the speaker emits outside The quality
and spread of the sound that is made vary with the size of this gap.
[0010]
Therefore, according to the speaker device of claim 1, by adjusting the angle of the top plate, the
player can enjoy various sound quality and a sense of sound spread that can not be obtained by
the electric circuit. can get.
Also, as in the prior art, by combining the change in the sound quality and the like by the electric
circuit, it is possible to obtain the effect that the player can adjust the sound quality and the like
from a wider range to the one that suits his preferences.
[0011]
The invention according to claim 2 is the speaker device of the electronic keyboard instrument
according to claim 1, characterized in that the speaker is fixed at a position inside the electronic
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keyboard instrument and away from the upper front plate. Do. The speaker in this speaker device
is fixed inside the electronic keyboard instrument at a position separated from the upper front
plate, for example, by supporting the side plates erected on the left and right of the electronic
keyboard instrument via mounting brackets. Can. It is preferable that this speaker is disposed so
that the diaphragm is inclined toward the upper opening. Since the speaker is provided
independently of the top plate and the speaker, the speaker remains fixed inside the electronic
keyboard instrument regardless of the opening and closing of the top plate.
[0012]
In this speaker device, the speaker is separated from the upper front plate. If it is fixed at a
position in contact with the upper front plate, no sound is produced from the gap of the upper
opening that occurs when the top plate is opened. It is because it becomes extremely difficult to
come out. According to the speaker apparatus of claim 2, the same effect as that of claim 1 can
be obtained.
[0013]
The invention according to claim 3 is the speaker device of the electronic keyboard instrument
according to claim 2, wherein the speaker has a part of the sound emitted from the speaker when
the top plate is opened. It is characterized in that it is arranged so as to be reflected to the
outside and to go out. In this speaker device, when the top plate is opened, a part of the sound
emitted from the speaker is not reflected to the back surface of the top plate but directly out
through the gap formed in the upper opening, and a part is the top plate The light is reflected on
the back surface of the light source and passes out through the gap created in the upper opening.
The former changes the quality and the spread of the sound passing through the gap when the
size of the gap changes, and the latter changes the quality and the feeling of the sound according
to the reflection angle when the reflection angle changes according to the angle at which the top
plate is opened. According to the speaker apparatus of claim 3, the same effect as that of claim 1
can be obtained.
[0014]
The invention according to claim 4 is the speaker device of the electronic keyboard instrument
according to claim 1, characterized in that the speaker is fixed to the back surface of the top
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plate. In this speaker device, since the speaker is fixed to the back surface of the top plate, the
speaker is exposed to the outside as the top plate is opened. For this reason, if the top board is
fixed at an appropriate angle from the state in which all the speakers are hidden to the state in
which all the speakers are exposed by the angle adjustment mechanism, the sound quality of the
performance sound reaching the performer and the feeling of sound expansion are adjusted. be
able to. According to the speaker apparatus of claim 4, the same effect as that of claim 1 can be
obtained.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present
invention will be described below with reference to the drawings. It is needless to say that the
embodiment of the present invention is not limited to the following examples at all, and various
modes can be adopted within the technical scope of the present invention. [First Embodiment]
FIG. 1 is an explanatory view of an electronic keyboard instrument according to a first
embodiment, wherein (a) is a front view and (b) is a right side view.
[0016]
The electronic keyboard instrument 10 according to the first embodiment mainly includes a shelf
2, a keyboard 4, a keyboard lid 6, a top 8, a top front plate 7, a bass speaker 11 and a mid to
high pitch speaker 16. The shelf board 2 is horizontally installed between a pair of left and right
vertical side plates 3, 3 and a plurality of keyboards 4, 4... An action load simulation member 5 is
provided on the back side (right side in FIG. 1B) of the keyboard 4. The action load simulating
member 5 applies a load which the action mechanism of the acoustic piano gives to the normal
keyboard when the keyboard 4 is depressed. Further, a keyboard lid 6 for opening and closing
the keyboard 4 is attached above the keyboard 4.
[0017]
The upper front plate 7 is a plate member bridging the front sides of the side plates 3 and 3. At
the upper portion of the upper front plate 7, square sound emission holes 18 are provided on
both left and right sides, and the sound emission holes 18 A saran net 19 covering 18 is
attached. The top plate 8 is attached to the upper end of the back plate 9 so as to be openable
and closable via a hinge 17 (the angle adjusting mechanism of the present invention), and covers
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the upper opening 10a (see FIG. 2B) of the electronic keyboard instrument 10. . The upper
opening 10 a is a portion surrounded by the upper ends of the side plates 3 and 3, the upper end
of the upper front plate 7, and the upper end of the back plate 9. The hinge 17 does not rotate in
an axial direction depending on the weight of the top plate 8 and is rotated by applying an
external force. Therefore, for example, if the player releases his / her hand with the top 8 open at
an arbitrary angle from the closed state, the top 8 will stop at that angle. The height of the tabletop 8 is such a height as to be positioned between the chest and the head of the player when the
player sits on a performance chair and plays.
[0018]
Loudspeakers 11, 11 are built in the speaker boxes 12, 12, and the speaker boxes 12, 12 are
disposed below the shelf board 2 of the electronic keyboard instrument 10. A saran net is
provided on the front of the bass speaker 11. The middle and high-pitched speakers 16, 16 are
disposed above the shelf board 2 of the electronic keyboard instrument 10 and on the left and
right sides, respectively. The speaker 16 is supported so that the diaphragm 16a is obliquely
upward at a position facing the sound emission hole 18 provided in the upper front plate 7 and
at a distance from the upper front plate 7. The speaker 16 may be supported by, for example, an
L-shaped mounting bracket fixed to the side plate 3.
[0019]
The keyboard 4 is provided with various sensors (not shown), and the various sensors are wired
to transmit detection signals to a control device (not shown). Further, the control device is
connected to cause the speakers 11, 11, 16, 16 to output sound via a digital sound source (not
shown).
[0020]
Next, the operation of the electronic keyboard instrument 10 of the first embodiment will be
described based on FIG. FIG. 2 is an explanatory view showing the spread of the sound of the
electronic keyboard instrument of the first embodiment, in which (a) is in a state in which the top
is closed and (b) is in a state where the top is open. When the performer depresses the keyboard
4 with the top plate 8 closed, the control device receives detection signals of various sensors
provided on the keyboard 4, and based on the detection signals, the speakers 11, 11 through
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digital sound sources. Output sound from 16 and 16 At this time, as shown in FIG. 2 (a), most of
the sound output from the speaker 16 directly goes out through the sound release hole 18 of the
upper front plate 7 and reaches the player's ear. After being partially reflected on the back
surface of the top plate 8, the light exits through the sound emission holes 18.
[0021]
On the other hand, when the player depresses the keyboard 4 with the table-top 8 open, the
control device receives detection signals of various sensors provided on the keyboard 4, and
based on the detection signals, the speaker 11 via the digital sound source Output sounds from
11, 16, and 16. At this time, as shown in FIG. 2 (b), a part of the sound output from the speaker
16 is directly output to the outside through the sound emission hole 18 and a part is in contact
with the back surface of the top 8 Then, it is discharged to the outside through the gap D formed
in the upper opening 10a of the electronic keyboard instrument 10, and a part thereof is
reflected to the back surface of the top plate 8 and then discharged to the outside through the
gap D formed in the upper opening 10a.
[0022]
As described above, in a state in which the top 8 is closed and in a state in which the top 8 is
open, the states of sounds emitted from the speakers 16 and 16 are largely different. Further,
depending on the angle when the top plate 8 is opened and the size of the gap D generated in the
upper opening 10a, the appearance of the sound emitted from the speakers 16, 16 largely differs
to the outside. For this reason, the player can enjoy various sound quality and a feeling of spread
of sound that can not be obtained by the electric circuit by appropriately adjusting the angle of
the top plate 8. Also, as in the prior art, by combining the change in the sound quality and the
like by the electric circuit, the performer can adjust the sound quality and the like of a wider
range to the one that suits his / her preference. [Second Embodiment] FIG. 3 is an explanatory
view of an electronic keyboard instrument according to a second embodiment, wherein (a) is a
front view, and (b) is a right side view.
[0023]
The electronic keyboard instrument 20 of the second embodiment is different from the first
embodiment in that the upper front plate 27 is not provided with a sound output hole or a saran
net, and that the arrangement of the middle and high-tone speakers 26, 26 is different. The
configuration is the same as that of the first embodiment except for the above.
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[0024]
The middle and high-pitched speakers 26 and 26 of the second embodiment are fixed to the left
and right sides of the top plate 8 on the left and right sides, respectively.
The speaker 26 is supported at a position away from the upper front plate 27, for example, on
the tip side of an L-shaped mounting bracket (not shown) fixed to the back surface of the top
plate 8.
[0025]
Next, the operation of the electronic keyboard instrument 20 of the second embodiment will be
described. When the performer depresses the keyboard 4 with the top plate 8 closed, the control
device receives detection signals of various sensors provided on the keyboard 4, and based on
the detection signals, the speakers 11, 11 through digital sound sources. Output sounds from 26
and 26. At this time, the sound in the middle to high range output from the speaker 26 leaks
from the lower side because the top 8 is closed, and the sound quality becomes quiet.
[0026]
On the other hand, when the player depresses the keyboard 4 with the table-top 8 open, the
control device receives detection signals of various sensors provided on the keyboard 4, and
based on the detection signals, the speaker 11 via the digital sound source The sound is output
from 11, 26, 26. At this time, a part of the sound output from the speaker 26 does not hit the
back surface of the top plate 8 and goes out through the gap formed in the upper opening 20 a
of the electronic keyboard instrument 20. After being reflected on the back side, it goes out
through the gap created in the upper opening 20a. For this reason, the sound quality becomes
clear as compared with the case where the top 8 is closed, and the spread of the sound also
becomes large.
[0027]
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As described above, in a state in which the top 8 is closed and in a state in which the top 8 is
open, the appearance of the sound emitted from the speaker 26 is largely different. Further,
depending on the angle when the top 8 is opened and the size of the gap generated in the upper
opening 20a, the appearance of the sound emitted from the speaker 26 largely differs to the
outside. For this reason, the player can enjoy various sound quality and a feeling of spread of
sound that can not be obtained by the electric circuit by appropriately adjusting the angle of the
top plate 8. Also, as in the prior art, by combining the change in the sound quality and the like by
the electric circuit, the performer can adjust the sound quality and the like of a wider range to
the one that suits his / her preference. [Other Embodiments] In the above embodiment, the hinge
17 is adopted as the angle adjusting mechanism, but instead of the hinge 17, an angle adjusting
mechanism shown in FIG. 4 may be adopted. FIG. 4 is an explanatory view of a modification of
the second embodiment. The angle adjustment mechanism comprises a back-up bar 31 pivotable
about a fulcrum 31a, and notches 8a and 8b provided on the top plate 8 and engageable with the
tip of the back-up bar 31. The top plate 8 is supported at the position shown by the alternate
long and short dash line in FIG. 4 if the tip of rod 31 is engaged with notch 8a, and if the tip of
rod 31 is engaged with notch 8b in FIG. The top 8 is supported at a position indicated by a twodot chain line.
[0028]
Brief description of the drawings
[0029]
FIG. 1 is an explanatory view of an electronic keyboard instrument according to a first
embodiment, wherein (a) is a front view, and (b) is a right side view.
[0030]
FIG. 2 is an explanatory view showing the spread of the sound of the electronic keyboard
instrument of the first embodiment, in which (a) is in a state in which the top is closed and (b) is
in a state where the top is open.
[0031]
FIG. 3 is an explanatory view of an electronic keyboard instrument according to a second
embodiment, where (a) is a front view and (b) is a right side view.
[0032]
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FIG. 4 is an explanatory view of a modified example of the second embodiment.
[0033]
5 (a) is a front view, and FIG. 5 (b) is a right side view.
[0034]
Explanation of sign
[0035]
Reference Signs List 2 shelf board 3 side plate 4 keyboard 5 keyboard cover 7 upper front plate
8 top plate 9 back plate 10 · · Electronic keyboard instrument, 10a · · · upper opening, 11 · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · electronic keyboard instrument 10a · · · upper opening, 11 · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · speaker ,
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