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JPH0573695

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPH0573695
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
electronic musical instrument such as an electronic piano.
[0002]
2. Description of the Related Art Electronic musical instruments such as electronic pianos and
electronic organs are conventionally known. These electronic musical instruments are generally
provided with a speaker, and in some cases, may be provided with a reflector for reflecting
musical tones emitted from the speaker. For example, Japanese Utility Model Application LaidOpen No. 62-201795 proposes an electronic musical instrument provided with a reflecting plate
for reflecting a musical tone emitted downward from a speaker forward.
[0003]
By the way, electronic musical instruments are sometimes used at home and sometimes in
concert halls and the like. For example, when an electronic musical instrument is used for
practice at home, the back is often placed in contact with the wall of the room, and in this case, it
is preferable that the tones emitted from the speaker be directed to the player side . On the other
hand, in a concert hall or the like, it may be preferable that the musical tones be emitted mainly
to the audience behind the electronic musical instrument.
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[0004]
As described above, depending on the place of use and the purpose of use, there are cases where
it is desirable to direct the musical tone emitted from the speaker to the player side or to the
backward side. Furthermore, there are also cases where it is desired to change the ratio of tones
to be sent to both of them in accordance with the use situation. An object of the present
invention is to provide an electronic musical instrument which can reflect musical tones emitted
from a speaker in the back and forth direction in accordance with usage conditions by changing
the ratio of division.
[0005]
The electronic musical instrument according to the present invention for achieving the above
object is an electronic musical instrument comprising a pair of supporting members for
supporting the left and right ends respectively: (1) at least one of the pair of supporting members
(2) A tone wave is formed on the speaker attached to at least one of the support members, and
the tone emitted from the speaker is divided in the back and forth direction of the electronic
musical instrument One end side of the diffuser (3) to be reflected is rotatably attached to the
wedge-shaped tip of the diffuser, and the other end side freely moves in the front-rear direction
near the front of the speaker. It is characterized in that it has a function to change the ratio of
division in the front and back direction of the musical tone emitted from the speaker.
[0006]
Since the electronic musical instrument according to the present invention is provided with the
above-mentioned flap, the musical tone emitted from the speaker is divided into two by this flap
and divided into the front and back sides of the flap and travels along the flap. The musical tones
traveling along the front of the flap are reflected to the front of the electronic musical
instrument, and the musical tones traveling along the rear of the flap are reflected to the rear of
the electronic musical instrument.
Here, since the flap is pivotable, the division ratio of the musical tone changes according to
where the other end side (speaker side) of the flap is disposed. Therefore, it is possible to
arbitrarily select whether the musical tone is to be directed to the player side (in front of the
electronic musical instrument), to the rear of the electronic musical instrument, or at what rate to
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be distributed to both of them.
[0007]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present
invention will be described below with reference to the drawings. FIG. 1 is a front view showing
an electronic musical instrument according to this embodiment, FIG. 2 is a sectional view taken
along the line A-A of FIG. 1, and FIG. 3 is a sectional view taken along the line B-B of FIG. The
electronic musical instrument 10 includes an electronic musical instrument main body 12 and a
pair of support members 14 a and 14 b for supporting the left and right ends of the electronic
musical instrument main body 12. , A keyboard 18, a sliding lid 19 and a music stand 20 are
provided. Further, two sets of speakers 24a, 24b for emitting musical tones toward the support
members 14a, 14b are provided in the speaker box 25 (see FIG. 3). The speakers 24a and 24b
are provided with a tweeter 26, a woofer 28, and a duct 30. In addition, a pedal 32 is placed
under the foot to adjust the sound quality etc.
[0008]
Diffuser 34a, 34b is attached to support member 14a, 14b, respectively, and this diffuser 34a,
34b forms a wedge shape toward speaker 24a, 24b, respectively. One end side of the flaps 38a,
38b is rotatably attached to the wedge shaped end portions 36a, 36b of the diffusers 34a, 34b,
and the other end sides 40a, 40b are respectively front and rear near the front of the speakers
24a, 24b. It is configured to move freely. The upper ends of the flaps 38a and 38b are configured
to be stopped at an arbitrary position by friction with the bottom of the electronic musical
instrument body 12 and the lower end thereof.
[0009]
Next, referring to FIG. 3 to FIG. 5, the method of changing the division ratio of the musical sound
emitted from the speakers 24a and 24b of the electronic musical instrument 10 in the front and
back direction of the electronic musical instrument 10 according to the use situation. explain. 4
and 5 show only the side of the speaker 24a. When this musical tone is divided in a
predetermined ratio in the front-rear direction of the electronic musical instrument 10 and
reflected (standard setting), as shown in FIG. 3, the other ends 40a, 40b of the flaps 38a, 38b are
respectively The flaps 38a, 38b are moved so as to be positioned in front of the speakers 24a,
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24b. As a result, the tones emitted from the speakers 24a and 24b travel in parallel along the
flaps 38a and 38b as shown by the arrows 48 and 50 and hit the front and rear surfaces of the
diffusers 34a and 34b forming a wedge shape, respectively. The musical tones are divided and
reflected at a predetermined ratio in the front-rear direction of the electronic musical instrument.
[0010]
When almost all of the musical tone is reflected toward the rear of the electronic musical
instrument (rear priority setting), the other end 40a of the flap 38a is on the front side of the
electronic musical instrument 10, as shown in FIG. Move the flaps to be positioned. As a result,
most of the musical sound strikes the surface of the flap 38a and the diffuser 34a on the rear
side of the electronic musical instrument, and the musical sound is reflected rearward as shown
by arrows 52 and 54.
[0011]
Next, when almost all the musical tones are reflected toward the front of the electronic musical
instrument (forward priority setting), as shown in FIG. 5, the other end 40a of the flap 38a is
positioned behind the speaker 24a. Move the flaps as you want. As a result, since most of this
musical tone hits the surface of the flap 38a and the diffuser 34a on the front side of the
electronic musical instrument, the musical tone travels as shown by arrows 56 and 58 and is
reflected toward the front of the electronic musical instrument.
[0012]
In addition, when the other ends 40a and 40b of the flaps 38a and 38b are stopped at an
intermediate position, the musical tones are divided and reflected by the flaps 38a and 38b and
the diffusers 34a and 34b in a ratio according to the position in the front and rear direction.
Therefore, it is possible to arbitrarily change the division ratio of the musical tone in the front
and back direction. Further, the spread and sound quality of the left and right sound images can
be changed by the positions of the flaps 38a and 38b.
[0013]
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Next, a modification of the shape of the diffuser and the flap will be described with reference to
FIGS. 6 and 7. FIG. 6 shows the case where the length of the flap 38a is shortened, and FIG. 7
shows the case where the length of the flap 38a is elongated. . The wedge shape of the diffuser
also changes with the length of the flap. In any case, by moving the flap 38a, it is possible to
change the rate of division of the musical tone in the back and forth direction of the electronic
musical instrument.
[0014]
As described above, in the electronic musical instrument of the present invention, a diffuser for
dividing the musical sound emitted from the speaker in the longitudinal direction of the
electronic musical instrument, and the ratio of the division in the longitudinal direction of the
musical tone A flap to be changed is provided, and the other end of the flap on the speaker side is
configured to be stopped at an arbitrary position near the front of the speaker, so that the
musical tone emitted from the speaker is divided in the front and back direction Change the
percentage of
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