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JP3201529

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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
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP3201529
The present invention provides an electronic musical instrument capable of generating a musical
tone having a large volume and good sound quality even in a small electronic musical instrument.
An electronic musical instrument (10) includes a keyboard (12) as a performance operation
element operated by a performer, and a tone signal generation circuit generating a tone signal
according to the performance operation of the performance operation element. The electronic
musical instrument 10 is provided with a converter 30A that vibrates the installation member 20
on which the electronic musical instrument 10 is installed. The transducer 30A is connected to a
fixing member (yoke or bobbin) fixed inside the electronic musical instrument 10 and the fixing
member via an elastic member, and protrudes downward from the lower surface of the electronic
musical instrument 10 to the fixing member. It consists of a displacing member (bobbin or yoke)
displaceable in the up and down direction, and converts the generated tone signal into the
vibration in the up and down direction of the displacing member. [Selected figure] Figure 2
Electronic musical instrument
[0001]
The present invention relates to an electronic musical instrument that generates musical tones in
response to performance operations.
[0002]
For example, Patent Document 1 below shows a small-sized electronic musical instrument as a
musical instrument toy that generates a musical tone by depressing the keyboard.
11-05-2019
1
In this electronic musical instrument, a musical tone signal is converted into an acoustic signal by
a small speaker provided inside the electronic musical instrument to produce a musical tone.
[0003]
Japanese Utility Model Application Publication No. 5-5194
[0004]
However, with a small speaker mounted on a small electronic musical instrument described in
the background art, the capacity of the cabinet can not be increased, so the volume of the
musical tone is small and the tone quality of the musical tone is not good.
[0005]
The present invention has been made to address the above-mentioned problems, and an object
thereof is to provide an electronic musical instrument capable of generating musical tones having
a large volume and good sound quality even in a small electronic musical instrument. is there.
In the following description of each component of the present invention, the reference numerals
of corresponding parts of the embodiment are described in parentheses in order to facilitate
understanding of the present invention. It should not be interpreted as being limited to the
configuration of the corresponding part indicated by the code of the form.
[0006]
In order to achieve the above object, the features of the present invention include a performance
operation element (12) operated by a performer and a tone signal generation circuit (42)
generating a tone signal according to the performance operation of the performance operation
element. The electronic musical instrument includes a fixing member (31 or 33) fixed inside the
electronic musical instrument, and is connected to the fixing member via an elastic member (35
or 36) from the lower surface of the electronic musical instrument downward. An installation
member (in which an electronic musical instrument is installed by converting the generated
musical tone signal into vertical vibration of the displacement member) which is composed of a
displacement member (33 or 31) which protrudes and is vertically displaceable with respect to
the fixing member 20) to provide a transducer (30A, 30B) for vibrating.
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2
[0007]
In this case, for example, the lower surface of the electronic musical instrument may be provided
with a plurality of legs (14), and the transducer may be provided in the case (11) between the
plurality of legs.
Further, a leg (14) may be provided on the lower surface of the electronic musical instrument,
and the transducer may be provided on the leg.
Furthermore, for example, the fixing member may be a yoke (31) to which the magnet (32) is
fixed, and the displacement member may be a wound bobbin (33) of the coil (34). The fixing
member may be a bobbin (33) wound with a coil (34), and the displacement member may be a
yoke (31) to which the magnet (32) is fixed.
[0008]
In the present invention configured as described above, when the electronic musical instrument
is placed on an installation member such as a desk, a table, or a box, the displacement member
abuts on the upper surface of the installation member by its own weight. In this state, when the
player operates the performance operation element to generate a tone signal in the tone signal
generation circuit, the converter vibrates the displacement member in the vertical direction
according to the tone signal. The vibration in the vertical direction of the displacement member is
transmitted to the installation member, and the installation member also vibrates in the vertical
direction according to the musical tone signal to generate a musical tone. Since the installation
member is a relatively large member such as a desk, a table, or a box, the volume of the musical
tone can be increased, and at the same time, the tone quality of the musical tone can be
improved. As a result, according to the present invention, even in a small electronic musical
instrument, it is possible to generate a musical tone having a large volume and a good sound
quality through the installation member.
[0009]
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3
It is a schematic perspective view of the electronic musical instrument concerning one
embodiment of the present invention. It is a front view of the electronic musical instrument of
FIG. 1 installed on the installation member. 3 is an enlarged longitudinal cross-sectional view of
the transducer portion of FIG. 2; It is a circuit block diagram of the electric circuit device
provided in the electronic musical instrument of FIG. It is an expansion longitudinal crosssectional view of the converter part which concerns on a 1st modification. It is a front view of the
electronic musical instrument which concerns on the 2nd modification installed on the
installation member.
[0010]
Hereinafter, an electronic musical instrument 10 according to an embodiment of the present
invention will be described using the drawings. FIG. 1 is a schematic perspective view of an
electronic musical instrument 10 according to an embodiment of the present invention, and FIG.
2 is a front view of the electronic musical instrument 10 installed on an installation member 20.
In the present specification, the upper side and the lower side in FIG. 1 are the rear side and the
front side of the electronic musical instrument 10, the lateral direction in FIGS. 1 and 2 is the
lateral direction of the electronic musical instrument 10, and the upper and lower sides in FIG.
The direction is described as the vertical direction of the electronic musical instrument 10.
[0011]
The electronic musical instrument 10 is a small electronic musical instrument for toys or music,
and has a relatively thin rectangular parallelepiped case 11 in the vertical direction. A keyboard
12 consisting of a plurality of keys (white key and black key) is provided on the upper surface of
the case 11, and a plurality of operators for controlling tone elements such as tone and volume
are provided behind the keyboard 12 13 are provided. At the left and right end portions of the
lower surface of the case 11, a pair of legs 14 elongated in the front-rear direction is provided.
The leg 14 has its lower surface in contact with the upper surface of the installation member 20
in a state where the electronic musical instrument 10 is installed on the installation member 20.
The installation member 20 is a member having a plate-like portion on the top of a table, desk,
box or the like. In addition, in order to generate musical tones of good volume and tone quality in
the generation of musical tones to be described later, a dedicated box having excellent acoustic
effects is prepared as the installation member 20, and the installation member 20 for installing
the electronic musical instrument 10 It is also possible to use as.
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4
[0012]
In the case 11, a transducer 30A is assembled between the pair of legs 14 at the center position
in the left-right direction. The converter 30A is provided with the yoke 31, the magnet 32, the
bobbin 33, and the coil 34, as shown to the enlarged longitudinal cross-sectional view of FIG. The
yoke 31 has a disc portion 31a formed in a disc shape, and a cylindrical projecting portion 31b
projecting downward at the center position of the disc portion 31a, and the inside of the case 11
ie the electron is formed on the top face of the disc portion 31a. It is fixed to the lower surface of
the upper surface wall 15 a of the cylindrical chassis 15 provided in the musical instrument 10.
The protrusion 31b of the yoke 31 may be cylindrical. The magnet 32 is formed in an annular
shape having a predetermined thickness, and is magnetized in the N pole and the S pole in the
vertical direction. The magnet 32 is fixed to the lower surface of the disc portion 31a of the yoke
31 at the upper surface thereof, and the protrusion 31b of the yoke 31 is penetrated through the
central through hole.
[0013]
The bobbin 33 is formed in a cylindrical shape, and the upper end surface thereof is opened to
allow the protrusion 31b of the yoke 31 to enter the inside thereof. The lower end surface of the
bobbin 33 is closed by the bottom wall 33a. A coil 34 is wound around the upper outer
peripheral surface of the bobbin 33. Further, an annular damper 35 is fixed to the outer
peripheral surface of the bobbin 33 at its inner peripheral surface. The damper 35 is fixed to the
inner peripheral surface of the chassis 15 at its outer peripheral surface. Therefore, the bobbin
33 and the coil 34 are supported by the chassis 15 via the damper 35. The damper 35 is formed
of a membrane-like elastic member having elasticity and is alternately bent up and down like
waves in the radial direction, and the displacement of the bobbin 33 in the vertical direction with
respect to the chassis 15 and the yoke 31 Allow
[0014]
In the converter 30A configured in this manner, the inner portion of the damper 35 is set by the
weight of the bobbin 33 and the coil 34 before the electronic musical instrument 10 is installed
on the installation member 20 by bringing the leg 14 into contact with the installation member
20. Is displaced downward, and the bottom wall 33a of the bobbin 33 is positioned below the
lower surface of the leg 14. When the electronic musical instrument 10 is installed on the
installation member 20 with the lower surface of the leg 14 in contact with the upper surface of
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5
the installation member 20, the inner portion of the damper 35 is displaced upward, and the
bottom wall 33 a of the bobbin 33 The lower surface of the lower surface contacts the upper
surface of the installation member 20. In this embodiment, the yoke 31 corresponds to the fixing
member fixed inside the electronic musical instrument 10 in the present invention, and the
bobbin 33 protrudes downward from the lower surface of the electronic musical instrument 10
in the present invention to the fixing member. Corresponding to the displacement member which
can be displaced in the vertical direction.
[0015]
Next, an electric circuit device provided in the electronic musical instrument 10 will be described.
This electric circuit device includes a detection circuit 41 and a tone signal generation circuit 42
as shown in FIG. The detection circuit 41 includes key switches corresponding to the plurality of
keys of the keyboard 12 and switches, volumes and the like corresponding to the plurality of
operators 13, and the key release state of the plurality of keys and the operation state of the
operators 13 Are detected and supplied to the tone signal generation circuit 42 as a detection
signal. The musical tone signal generation circuit 42 generates a musical tone signal in response
to the detection signal indicating the key release state of the plurality of keys supplied from the
detection circuit 41, and outputs it to the amplifier 43. Further, the musical tone signal
generation circuit 42 controls musical tone elements such as timbre and volume of the generated
musical tone signal in accordance with the detection signals indicating the operation states of the
plurality of operators 13 supplied from the detection circuit 41. The amplifier 43 is electrically
connected to the coil 34 of the converter 30A (30B) via a conductor (not shown), amplifies the
musical tone signal output from the musical tone signal generation circuit 42, and outputs the
amplified musical tone signal to the coil 34.
[0016]
Next, the operation of the electronic musical instrument 10 configured as described above will be
described. As described above, before installing the electronic musical instrument 10 on the
installation member 20, the bottom wall 33a of the bobbin 33 is located below the leg 14, but
the lower surface of the leg 14 is in contact with the upper surface of the installation member 20
When the electronic musical instrument 10 is installed on the installation member 20, the lower
surface of the bottom wall 33a of the bobbin 33 is in contact with the upper surface of the
installation member 20.
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[0017]
In this state, when the player operates the operation element 13 and depresses and releases the
keyboard 12 to start the performance of the electronic musical instrument 10, the musical tone
signal generation circuit 42 generates the plurality of keys from the detection circuit 41. It starts
generating a tone signal according to a detection signal representing a key depression state. Note
that musical tone elements such as the tone color and volume of the musical tone signal are
determined in accordance with the operation of the operating element 13. This musical tone
signal is output via the amplifier 43 to the coil 34 of the converter 30A. Therefore, an electric
signal corresponding to a musical tone signal flows through the coil 34, and the bobbin 33 starts
vibrating vertically with respect to the yoke 31, that is, with respect to the electronic musical
instrument 10 according to the electric signal. The vibration in the vertical direction of the
bobbin 33 is transmitted to the installation member 20, the installation member 20 vibrates in
the vertical direction, and the vibration in the vertical direction of the installation member 20
generates an acoustic signal (musical tone) corresponding to a musical tone signal. .
[0018]
As described above, in the electronic musical instrument 10 according to the present
embodiment, the installation member 20 is vibrated by the vibration of the bobbin 33 in the
vertical direction to generate a musical tone. Since the installation member 20 is a relatively
large plate-like member at the top of a table, desk, box or the like, a musical tone having a large
volume and a good sound quality will be produced. As a result, according to the above-described
embodiment, even with the small electronic musical instrument 10, it is possible to produce a
musical tone having a good volume and tone quality.
[0019]
a. First Modified Example Next, a first modified example of the embodiment will be described.
FIG. 5 is an enlarged vertical cross-sectional view of a transducer portion according to a first
modification. The converter 30B according to the first modified example is assembled to the case
11 upside down with the converter 30A of the above embodiment. The configuration of the yoke
31, the magnet 32, the bobbin 33, and the coil 34 constituting the converter 30B is the same as
that of the converter 30A of the above embodiment, and thus the description thereof will be
omitted.
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7
[0020]
In the first modification, the bobbin 33 is fixed on the upper surface of the bottom wall 33 a to
the lower surface of the upper surface wall 16 a of the cylindrical chassis 16 provided in the case
11, that is, the electronic musical instrument 10. Similarly to the damper 35 of the abovedescribed embodiment, the damper 36 is also annularly formed of a membrane-like elastic
member having elasticity, and is formed to be alternately bent up and down like waves in the
radial direction. However, the inner diameter of the damper 36 is larger than the inner diameter
of the damper 35. In this case, the inner circumferential surface of the damper 36 is fixed to the
outer circumferential surface of the magnet 32, and the outer circumferential surface of the
damper 36 is fixed to the inner circumferential surface of the chassis 16. That is, the yoke 31
and the magnet 32 are vertically movably supported by the bobbin 33 via the damper 36 and the
chassis 16.
[0021]
Then, in the first modification, before the electronic musical instrument 10 is installed on the
installation member 20 by bringing the leg 14 into contact with the installation member 20, the
inner portion of the damper 36 is lowered by the weight of the yoke 31 and the magnet 32. The
disc portion 31 a of the yoke 31 is located below the bottom of the leg 14. When the electronic
musical instrument 10 is installed on the installation member 20 with the lower surface of the
leg 14 in contact with the upper surface of the installation member 20, the inner portion of the
damper 35 is displaced upward, and the disc portion 31 a of the yoke 31 is The lower surface of
the lower surface contacts the upper surface of the installation member 20. In the first
modification, the bobbin 33 corresponds to a fixing member fixed inside the electronic musical
instrument 10 in the present invention, and the yoke 31 protrudes downward from the lower
surface of the electronic musical instrument 10 in the present invention to be a fixing member. It
corresponds to a displacement member which can be displaced in the vertical direction with
respect to.
[0022]
Then, in the first modified example, the electronic musical instrument 10 is installed on the
installation member 20, and the lower surface of the disk portion 31a of the yoke 31 is brought
into contact with the upper surface of the installation member 20. When the performer operates
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8
the operating element 13 and presses the key 12 on the keyboard 12 to start playing the
electronic musical instrument 10, the musical tone signal from the musical tone signal
generation circuit 42 is converted through the amplifier 43 to the converter 30B. Is supplied to
the coil 34 of Therefore, an electric signal corresponding to a musical tone signal flows through
the coil 34. In this case, the yoke 31 starts vibrating vertically with respect to the bobbin 33, that
is, with respect to the electronic musical instrument 10. The vibration in the vertical direction is
transmitted to the installation member 20, and the installation member 20 vibrates in the vertical
direction, and the vibration in the vertical direction of the installation member 20 generates an
acoustic signal (musical tone) corresponding to a musical tone signal.
[0023]
As described above, in the electronic musical instrument 10 according to the first modification,
the installation member 20 is vibrated by the vertical vibration of the yoke 31 to generate a
musical tone. As a result, according to the first modification, as in the case of the above
embodiment, even with the small electronic musical instrument 10, it is possible to emit a
musical tone having a good volume and tone quality.
[0024]
b. Second Modified Example Next, a second modified example of the embodiment will be
described. FIG. 6 is a front view of the electronic musical instrument according to the second
modification installed on the installation member 20. As shown in FIG. In this second
modification, the two transducers 30A of the above embodiment are assembled to the pair of legs
14, respectively. In this case, a chassis 15 (see FIG. 3) similar to that of the above embodiment is
provided on the pair of legs 14 and two transducers 30A are assembled to the pair of chassis 15,
respectively. The other configuration is the same as that of the above embodiment.
[0025]
Also in this second modification, the inner portion of the damper 35 is made by the weight of the
bobbin 33 and the coil 34 before the electronic musical instrument 10 is installed on the
installation member 20 by bringing the leg 14 into contact with the installation member 20. The
bottom wall 33 a of the bobbin 33 is positioned below the bottom surface of the leg 14 while
being displaced downward. When the electronic musical instrument 10 is installed on the
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9
installation member 20 with the lower surface of the leg 14 in contact with the upper surface of
the installation member 20, the inner portion of the damper 35 is displaced upward, and the
bottom wall 33 a of the bobbin 33 The lower surface of the lower surface contacts the upper
surface of the installation member 20.
[0026]
Also in this second modification, if the player starts playing the electronic musical instrument
using the keyboard 12 and the operating element 13 in this state, the musical tone signal from
the musical tone signal generation circuit 42 is transmitted through the amplifier 43. It is
supplied to the coil 34 of the transducer 30A. Therefore, as in the case of the first embodiment,
the installation member 20 vibrates in the vertical direction by the vibration of the bobbin 33 in
the vertical direction, and the vibration of the installation member 20 in the vertical direction
Musical tones are generated. As a result, according to the second modification, as in the case of
the above embodiment, even with the small electronic musical instrument 10, it is possible to
generate a musical tone having a good volume and tone quality.
[0027]
Further, in the second modification, since the transducers 30A are respectively assembled to the
pair of legs 14, the tone signal (electric signal) supplied to the two transducers 30A may be
divided into the left and right two channels. For example, it is possible to listen to the tone to be
produced in stereo.
[0028]
In the second modification, the converter 30A of the embodiment is provided on the leg 14.
However, the converter 30B of the first modification may be assembled on the leg 14.
Alternatively, the transducer 30A or the transducer 30B may be assembled to only one of the
pair of legs 14.
[0029]
The electronic musical instrument according to the present invention is not limited to the
embodiment and the various modifications described above, and can be appropriately modified
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10
within the technical scope of the present invention.
[0030]
In the above embodiment and various modifications, the electronic musical instrument 10 is
provided with the pair of legs 14. However, the pair of legs 14 is eliminated and the lower
surface of the case 11 is directly attached to the installation member 20 such as a desk, a table,
or a box. The electronic musical instrument 10 may be placed on the installation member 20
while being in contact with it.
In this case, the converter 30A of the above embodiment or the converter 30B of the first
modification may be assembled to the case 11 as in the above first embodiment.
[0031]
Further, in the embodiment and the first modification, the converter 30A or the converter 30B is
assembled to the case 11 between the pair of legs 14 and converted to the pair of legs 14 in the
second modification and the modification thereof. 30A or the converter 30B are assembled
respectively. However, instead of these, the transducer 30A or the transducer 30B may be
assembled to both of the pair of legs 14 in the case 11 and to the pair of legs 14.
[0032]
Further, in the embodiment and the first modification, one converter 30A or converter 30B is
assembled to the case 11 between the pair of legs 14. However, instead of this, two or more
transducers 30A or transducers 30B may be assembled to the case 11. Further, in the second
modified example and the modified example thereof, the transducer 30A or the transducer 30B is
assembled to the pair of legs 14, respectively. Alternatively, however, the number of legs 14 may
be three or more, and three or more transducers 30A or transducers 30B may be assembled to
all or some of the legs 14, respectively.
[0033]
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11
Furthermore, in the above embodiment and various modifications, the electronic musical
instrument 10 in which the keyboard 12 is a performance operation element has been described.
However, instead of this, if the electronic musical instrument is to be installed and played on the
installation member 20 such as a desk, a table, a box, etc., the electronic musical instrument to
generate a musical tone by the operation of another performance operation element such as a
button or a slide member. The present invention can also be applied.
[0034]
DESCRIPTION OF SYMBOLS 10 ... Electronic musical instrument, 11 ... Case, 12 ... Keyboard, 13 ...
Operator, 14 ... Leg, 15, 16 ... Chassis, 20 ... Installation member, 30A, 30B ... Converter, 31 ...
Yoke, 32 ... Magnet, 33 ... Bobbin 34: coil 35: 36 Damper 42: tone signal generation circuit
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