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JPH1152955

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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
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPH1152955
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker device of an electronic musical instrument such as an electronic organ, an electronic
piano and a keyboard.
[0002]
2. Description of the Related Art Heretofore, this type of speaker device is built in the instrument
main body and has a speaker whose sound emitting surface is directed forward, a grille provided
so as to cover the sound emitting surface of the speaker, etc. There is. The grille is composed of a
plurality of parallel plates spaced apart from one another. For example, in the case of an
electronic organ, it is fixed and installed at a predetermined angle on a control panel at the rear
of the keyboard. Then, by radiating the playing sound generated by the speaker to the outside
through the grille at an angle according to the installation angle of the blade, for example, a
sound field centered on the performer's ear can be obtained. ing.
[0003]
However, in the conventional speaker apparatus as described above, since the playing sound
generated by the speaker is always emitted at a constant angle through the grille, it is not always
necessary to the performer. There is a drawback that it can not provide an optimal sound field.
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1
For example, when the performer is an adult and a small child, the heights of the performer's
ears differ considerably due to the difference in their physical constitutions. For this reason,
when the angle of the grille is designed for an adult player, the sound field is formed around a
position considerably higher than the ear when the child plays, and the playing sound is not well
transmitted to the player It will In addition, with a keyboard or the like, it is impossible to obtain
an optimal sound field in both cases, when playing in a chair and playing while standing and
playing.
[0004]
The present invention has been made to solve such a problem, and it is an object of the present
invention to provide a speaker device of an electronic musical instrument capable of obtaining an
optimum sound field regardless of a player's physical constitution or playing posture. The
purpose is.
[0005]
SUMMARY OF THE INVENTION In order to achieve this object, a speaker device of an electronic
musical instrument according to the present invention is provided in a case of a musical
instrument main body so as to face a speaker and a sound emitting surface of the speaker. And a
grill having a plurality of slats extending parallel to the sound emitting surface and spaced apart
from each other, wherein the plurality of slats of the grill are configured to be variable in angle
while maintaining parallel to each other. And
[0006]
According to this speaker device, the playing sound generated by the speaker is emitted from the
sound emission surface, and is emitted to the outside through the gap between the plurality of
slats of the grill opposite to this.
In this case, in the present invention, since the plate of the grill is configured to be variable in
angle, the radiation angle of the playing sound is changed by changing the angle of the plate.
Therefore, for example, according to the physical constitution, the playing posture, etc. of the
performer, the physical size of the performer is adjusted by adjusting the angle of the plate of the
grill so that the musical sound is emitted at an angle centered on the performer's ear. The
optimal sound field can be obtained regardless of the situation.
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[0007]
In this case, the grille is composed of the first and second grills sequentially arranged to face the
sound emitting surface of the speaker, and the plurality of vanes of the first grille and the
plurality of vanes of the second grille are It is preferable that they extend in different directions
and be configured to be rotatable independently of each other about respective longitudinal axes.
[0008]
According to this configuration, the emission angle of the sound produced by the speaker is first
changed by the first grille and then changed by the second grille in a direction different from the
first grille.
Therefore, by changing the angle of the slats of the first and second grills independently of each
other, the emission angle of the playing sound can be finely adjusted, and a better sound field
can be obtained.
[0009]
In this case, the first grille is composed of a left and right variable grille whose slats extend
vertically and can be rotated about the vertical axis, and the second grille slats laterally and
horizontally It is preferable that it is comprised by the up-and-down variable grill which can be
rotated centering on the axis line of direction.
[0010]
In this configuration, the emission angle of the playing sound can be adjusted only in the left and
right direction by changing the angle of the slat of the left and right variable grille, and by
changing the angle of the slat of the upper and lower variable grille, The radiation angle can be
adjusted only in the vertical direction.
Therefore, the player can easily understand the relationship between the angle of both the grilles
and the emission angle of the playing sound, so that the sound field can be finely and easily
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adjusted.
[0011]
Further, in the speaker device according to claim 1, it is preferable that the plurality of blade
plates be disposed to be inclined to the sound emitting surface of the speaker, and the grill be
rotatably attached to the case.
[0012]
In this configuration, by rotating the grille with respect to the case, the angle of the blade with
respect to the sound emission surface of the speaker changes.
Therefore, only by rotating one grill, the emission angle of the playing sound can be changed,
and the adjustment of the sound field can be easily performed.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present
invention will now be described in detail with reference to the drawings. FIG. 1 is a front view of
an electronic organ provided with the speaker device of the present invention. As shown in the
figure, the electronic organ 1 is supported by an organ main body 2 (instrument main body), a
pair of left and right parent plates 3 supporting the organ main body 2, and parent plates 3 The
shelf board 4 protrudes forward from the inside, and a pair of left and right arms 5 and 5 which
project forward from the inside of each parent board 3 and sandwich the shelf board 4 are
provided.
[0014]
On the shelf board 4, a keyboard unit 6 is disposed, and the keyboard unit 6 is provided with a
lower keyboard 7, an upper keyboard 8 and a control panel 9 (case) in this order from the front.
Various control switches 10 are attached to the control panel 9, and a pair of speaker devices 11
according to the present invention are provided at left and right ends.
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[0015]
As shown in FIGS. 2 to 4, each speaker device 11 includes a speaker 12 and a grill 13 provided in
front of the speaker 12. The speaker 12 has a vertically long, oblong front shape, and is screwed
to the speaker box 14 disposed behind the control panel 9 with the sound emitting surface 12 a
facing forward. On the other hand, an opening 15 is formed in a portion of the control panel 9
facing the speaker 12, and a grill 13 is provided in the opening 15.
[0016]
The grille 13 is composed of a left and right variable grille 16 mounted near the rear of the
opening 15 and a vertical variable grille 17 mounted near the front. The left and right variable
grille 16 has four vanes 18 extending in the vertical direction at intervals in the left-right
direction. Each of the slats 18 is an elongated rectangular shape and has an integral pivot shaft
18 a at its rear end, and the pivot shaft 18 a is pivotably attached to the upper and lower walls of
the opening 15. There is. The vanes 18 are configured to rotate in conjunction with each other
while keeping them parallel to one another, as shown in FIG. 4, by operating an operation
member (not shown). It is done.
[0017]
The upper and lower variable grille 17 is also basically configured in the same manner as the left
and right variable grille 16, and has eight vanes 19 extending in the left-right direction at
intervals in the up-down direction. As shown in FIG. 3, the slat 19 has an integral pivot shaft 19 a
attached to the left and right walls of the opening 15, and directly touches the slat 19 with a
hand to move it up and down. It is comprised so that it may interlock | cooperate and rotate in a
mutually parallel state centering | focusing on the rotational axis part 19a.
[0018]
Reference numeral 20 in FIG. 1 denotes a lower front plate, 21 denotes a music stand, 24
denotes a foot keyboard, and 25 denotes an expression pedal.
[0019]
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According to the speaker device 11 having the above-described configuration, when the lower
keyboard 7 or the upper keyboard 8 is depressed, an electronic performance sound
corresponding to that is emitted from the sound emission surface 12 a of each speaker 12.
The emitted playing sound first passes through the gap between the vanes 18 of the left and
right variable grille 16 facing the speakers 12, and at that time, the radiation angle is controlled
in the lateral direction according to the angle of the vanes 18 (FIG. 4) Arrows A and B) and then
through the gap between the slats 19 of the upper and lower variable grille 17, where the
radiation angle is controlled in the vertical direction according to the angle of the slats 19 (arrow
C in FIG. And D), emitted to the outside.
[0020]
As described above, the vanes 18 of the left and right variable grills 16 and the vanes 19 of the
upper and lower variable grills 17 are rotatable independently of each other, and can be changed
in angle. Therefore, for example, according to the physical constitution and playing posture of
the performer, the angles of the slats 18 and 19 of both the grills 16 and 17 are adjusted so that
the playing sound is emitted at an angle centered on the performer's ear By doing this, it is
possible to obtain an optimal sound field for them regardless of the player's physical constitution.
Alternatively, it is of course possible to adjust both the grills 16 and 17 so that the playing sound
is directed in the direction of the playing sound if the player wants to make the sound heard by
the other person rather than the player himself.
[0021]
Further, in the speaker device 11 of the present embodiment, the radiation angle of the
performance sound is adjusted only in the left and right direction by the left and right variable
grille 16 and only in the upper and lower direction by the upper and lower variable grille 17, so
that the sound field can be finely adjusted. In addition, since the player can easily understand the
relationship between the angles of both the grills 16 and 17 and the emission angle of the
playing sound, the adjustment of the sound field can be easily performed.
[0022]
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5 to 7 show a second embodiment in which the present invention is applied to a keyboard.
The keyboard 31 includes a keyboard unit 33 at the front of a main body case 32 (case), and a
pair of left and right speaker devices 34 and 34, a control switch (not shown), and the like at the
rear.
[0023]
Each speaker device 34 is composed of a speaker 35 and a grille 36. The speaker 35 has a
circular front shape, and is screwed to the back surface of the main body case 32 with the sound
emitting surface 35 a facing the circular opening 37 of the main body case 32 from the rear. The
grille 36 is integrally formed of a plurality of vanes 38 and a ring member 39 surrounding the
outer periphery of the vanes 38. The plurality of vanes 38 are attached to the ring member 39 in
parallel with each other and obliquely inclined outward.
[0024]
As shown in FIG. 6, while the engagement convex part 39a is formed in the outer peripheral
surface of the ring material 39, the engagement groove 37a is continuously formed in the inner
peripheral surface of the opening 37, and this engagement is carried out The engagement convex
portion 39a of the grill 36 is rotatably engaged with the groove 37a. The grill 36 is rotated along
the engagement groove 37a by operating an operation member (not shown).
[0025]
Therefore, according to the speaker device 34 of the present embodiment, the angle of the blade
plate 38 with respect to the sound emitting surface 35 a of the speaker 35 is set by operating the
operation member and rotating the entire grill 36 with respect to the main body case 32. It can
be changed. Since the radiation angle of the playing sound changes in accordance with such an
angle change of the blade 38, an appropriate sound field can be obtained according to the
physical constitution of the player also in the present embodiment. Further, compared with the
speaker device 11 of the first embodiment in which the angle adjustment of the two grills 16 and
17 is required, in the present embodiment, only one grill 36 needs to be turned, so that the
operability is better. Is obtained.
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[0026]
The present invention is not limited to the embodiment described above, and can be
implemented in various aspects. For example, although the present invention is applied to the
electronic organ in the first embodiment and to the keyboard in the second embodiment, the
present invention relates to electronic percussion and the like as well as other electronic
keyboard instruments such as the electronic piano and the like. The present invention is also
applicable to electronic musical instruments other than keyboard instruments. Further, in the
first embodiment, the grille is configured of the left and right variable grille and the upper and
lower variable grille extending respectively in the vertical direction and the left and right
direction, but the two grills may extend in different directions. Is optional.
[0027]
Furthermore, the configuration for varying the angle of the grill can adopt other than those
shown in the two embodiments. In addition, the configuration of the details can be changed as
appropriate without departing from the spirit of the present invention.
[0028]
As described above in detail, the speaker device of the electronic musical instrument according to
the present invention has the effect of being able to obtain an optimum sound field regardless of
the physical constitution or the playing posture of the performer. There is.
[0029]
Brief description of the drawings
[0030]
1 is a front view of an electronic organ incorporating the speaker device according to the first
embodiment of the present invention.
[0031]
2 is an enlarged front view of the speaker device of FIG.
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[0032]
3 is a cross-sectional view taken along the line III-III in FIG.
[0033]
4 is a cross-sectional view taken along the line IV-IV of FIG.
[0034]
5 is a plan view of a keyboard incorporating a speaker device according to a second embodiment
of the present invention.
[0035]
6 is a side sectional view of the speaker device of FIG.
[0036]
7 is an enlarged front view of the speaker apparatus of FIG.
[0037]
Explanation of sign
[0038]
Reference Signs List 1 electronic organ 9 control panel 11 speaker device 12 speaker 12 a sound
emitting surface 13 grille 16 right and left variable grille 17 upper and lower variable grille 18
blade plate of left and right variable grille 19 blade plate of vertical variable grille Sound
emission surface 36 Grill 38 Plate
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