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JPH07298385

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JPH07298385
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
loudspeaker system for converting an electrical signal to sound.
[0002]
2. Description of the Related Art Heretofore, a speaker apparatus has been proposed in which a
pair of speaker units are accommodated in one integrally formed housing (cabinet) and so-called
stereo reproduction is performed. That is, in this speaker device, the pair of speaker units is used
as a speaker unit for L (left) channel and R (right) channel. A speaker unit disposed on the left
side in the housing is supplied with an L channel acoustic signal, and a speaker unit disposed on
the right side in the housing is supplied an acoustic signal of R channel Be done.
[0003]
In this speaker device, the sound signals of the left and right channels are reproduced as sound
by the left and right speaker units, whereby a three-dimensional sound field is formed, and socalled stereo reproduction is performed.
[0004]
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1
By the way, in the speaker apparatus as described above, when the size of the housing is reduced
in order to enhance the portability, the distance between the speaker units becomes narrow.
Then, since the sound field formed by each of the speaker units is formed in the space
sandwiched by the speaker units, it is formed in the narrow space according to the distance
between the speaker units. Therefore, when the intervals between the speaker units are narrow,
it is not possible to perform sound listening as stereo reproduction unless the user listens closely
to the speaker device.
[0005]
That is, when the above-mentioned casing is miniaturized in the above speaker device, so-called
stereo feeling can not be obtained at a position separated from the speaker device by a
predetermined distance or more, and stereo reproduction can not be performed. It becomes.
[0006]
Therefore, the present invention is proposed in view of the above-mentioned circumstances, and
while the size is reduced and has good portability, a stereophonic sound field having a sufficient
spread for practical use is formed to perform stereo reproduction. It aims at providing a speaker
device that can be performed.
[0007]
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and achieve the
above object, a speaker device according to the present invention comprises a main body portion
for holding a pair of speaker units in the left and right direction away from each other; Each of
the reflectors is provided with a pair of left and right reflecting plates rotatably supported on the
main body, and each of the reflecting plates is used at a position where it is rotated in a direction
away from the main body. The sound emitted from the speaker unit is correspondingly reflected
and guided to the front side, and the peripheral portions are abutted with each other by being
rotated in the direction approaching the main body, and the respective speaker units are
substantially sealed. To be stored in the
[0008]
Further, according to the present invention, in the above-mentioned speaker device, when each
reflector is placed in the use position, the reflection surface portion facing the corresponding
speaker unit is substantially centered on the center of the speaker unit. It is assumed to be
formed in a spherical shape.
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2
[0009]
In the speaker device according to the present invention, the pair of left and right reflecting
plates rotatably supported by the main body for holding the pair of speaker units in the lateral
direction separating from each other is separated from the main body Since the sound emitted
from each of the speaker units is correspondingly reflected and guided to the front side by being
in the use position which is a position rotated in the direction, a three-dimensional sound field is
formed on the front side.
In addition, the respective reflecting plates are rotated in the direction approaching the main
body portion, so that the peripheral portions are abutted against each other, and the respective
speaker units are substantially enclosed in a sealed state, thereby facilitating portability. , Protect
the respective speaker units.
[0010]
Further, in the above-mentioned speaker device, each of the reflection plates is formed in a
substantially spherical shape with the reflection surface portion facing the corresponding
speaker unit when the above-mentioned use position is made, with the center of the speaker unit
as the approximate center. In this case, the sound reflected by these reflectors is concentrated on
the front side, and the three-dimensional sound field formed on the front side is made deeper.
[0011]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A specific embodiment of the
present invention will be described below with reference to the drawings.
The speaker device according to the present invention is configured to have a main body 1 as
shown in FIG.
The front side portion of the main unit 1 is a unit storage unit 4 that holds a pair of right speaker
unit 6 and left speaker unit 7 facing each other in the left-right direction.
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3
The unit storage portion 4 is formed as a vertically oblong, substantially elliptical casing, and has
on the left and right side surface portions a large number of minute through holes serving as
sound output holes.
[0012]
The speaker units 6 and 7 are, as shown in FIGS. 4 and 5, arranged in the vertical direction and
stored in the unit storage portion 4.
The right speaker unit 6 is housed in the unit housing portion 4 with its sound emitting surface
directed to the right side surface portion of the unit housing portion 4. Further, the left speaker
unit 7 is housed in the unit housing portion 4 with its sound emitting surface facing the side
surface portion on the left side of the unit housing portion 4.
[0013]
The above speaker units 6 and 7 are in the overlapping state in the vertical direction, so occupy
the space corresponding to the thickness of one speaker unit in the horizontal direction, and in
the front and rear direction Occupies a space corresponding to the width of one speaker unit.
Therefore, in the unit storage portion 4, the depth in the front-rear direction and the thickness in
the left-right direction are sufficient to correspond to one speaker unit.
[0014]
On the rear side of the unit storage portion 4, an amplifier storage portion 5 is integrally and
continuously provided via the cord winding portion 3 to constitute the main body portion 1. The
cord winding portion 3 is formed in a narrowed shape as compared to the unit storage portion 4
and the amplifier storage portion 5, and is formed as a groove-like concave portion around the
main body portion 1 There is.
[0015]
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4
The signal supply cord 12 is pulled out of the main body 1 from the lower part of the cord
winding part 3. The signal supply code 12 is for supplying an acoustic signal to each of the
speaker units 6 and 7 and a signal amplification amplifier to be described later. The plug 13 is
connected to the tip end side of the signal supply cord 12.
[0016]
The plug 13 is connected to an audio signal output terminal of an apparatus capable of
outputting stereo audio signals, such as an audio tape recorder apparatus, a video tape recorder
apparatus, a disc player apparatus, a radio receiver, or a television receiver. Is configured as. The
stereo sound signal is supplied from the sound output terminal to the speaker units 6 and 7 and
the signal amplification amplifier via the plug 13 and the signal supply cord 12.
[0017]
The signal supply cord 12 is wound around the cord winding portion 3 so that the signal supply
cord 12 can be stored in the cord winding portion 3 in a state where it does not protrude from
the outer side surface of the main body portion 1.
[0018]
A signal amplification amplifier (not shown) is housed in the amplifier housing portion 5.
A rear side portion of the amplifier housing 5 is a battery chamber 2. In the battery chamber 2, a
power source such as a so-called dry cell is accommodated. The signal amplification amplifier
operates by the power supplied from the power supply source.
[0019]
A power switch 23 and a conduction indicator light 24 are disposed on the upper surface of the
amplifier housing 5. The power switch 23 switches between supply and shutoff (on (ON) and off
(OFF)) of the power from the power supply to the signal amplifier. The conduction indicator light
24 is a light emitting element such as an LED, and emits light when power is supplied to the
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5
signal amplification amplifier.
[0020]
The acoustic signal supplied via the signal supply cord 12 is directly supplied to the speaker
units 6 and 7 when the signal amplification amplifier is in a non-operating state, and drives the
speaker units 6 and 7. Further, when the signal amplification amplifier is in operation, the
acoustic signal is amplified by the signal amplification amplifier and supplied to the speaker units
6 and 7. The signal amplification amplifier drives the speaker units 6 and 7 by the amplified
acoustic signal.
[0021]
An acoustic signal of the right (R) channel is supplied to the right speaker unit 6 regardless of the
operation non-operation of the signal amplification amplifier. The right speaker unit 6 emits
sound toward the right side of the unit storage unit 4 through the minute through hole, and
releases some back pressure to the left side of the unit storage unit 4. Similarly, the left speaker
unit 7 is supplied with an acoustic signal of the left (L) channel. The left speaker unit 7 emits
sound toward the left side of the unit storage unit 4 through the minute through hole, and
releases some back pressure to the right side of the unit storage unit 4.
[0022]
And as shown in FIG.2 and FIG.3, the left-right paired reflecting plate 10,11 is attached to the
said main-body part 1 so that rotation is possible. Each of the reflection plates 10 and 11 is
formed in a substantially disc shape having a central portion expanded into a substantially
spherical shape, and has a bowl-like shape.
[0023]
The left reflection plate 10 is disposed on the left side of the main body 1 with the center part
bulging direction on the left side. Further, the right reflection plate 11 is disposed on the right
side of the main body 1 with the bulging direction of the central portion on the right side. That is,
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the reflection plates 10 and 11 are disposed so as to wrap the main body 1 from both sides. Each
of the reflection plates 10 and 11 has a notch 20 at the rear edge side, into which the amplifier
housing 5 of the main body 1 is fitted.
[0024]
Upper and lower support pieces 21 and 22 are provided in the horizontal direction at upper and
lower edge portions of the notch 20 in each of the reflection plates 10 and 11. The support
pieces 21 and 22 project in the direction opposite to the direction in which the reflection plates
10 and 11 bulge, that is, to the right in the left reflection plate 10 and to the left in the right
reflection plate 11. And positioned inside the wedge-like shape of each of the reflectors 10,11.
[0025]
In each of the reflection plates 10 and 11, an upper rotation support shaft 17 is provided to
project downward on the rear side portion of the upper support piece 21. Further, in each of the
reflection plates 10 and 11, at the rear side portion of the lower support piece 22, the lower
rotation support shaft 18 is directed upward to face the upper rotation support shaft 17. It is
protrusively installed.
[0026]
A pair of left and right support holes 14 is bored in the upper surface of the amplifier housing 5
of the main body 1. Further, similarly to the upper surface portion of the amplifier storage
portion 5, a pair of left and right support holes are formed in the lower surface portion of the
amplifier storage portion 5 as well.
[0027]
As shown in FIG. 1, the left reflecting plate 10 has the upper turning support shaft 17 fitted in
the support hole 14 on the left side of the upper surface portion of the amplifier storage unit 5,
and the lower turning support shaft 18. A support hole on the left side of the lower surface
portion of the amplifier storage portion 5 is fitted to the main body portion 1 so as to be
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7
rotatable. At this time, the left side portion of the amplifier storage portion 5 is fitted into the
notch portion 20. Further, the right reflection plate 11 fits the upper rotation support shaft 17
into the support hole 14 on the right side of the upper surface of the amplifier storage unit 5,
and the lower rotation support shaft 18 is used as the amplifier storage unit 5. The main body 1
is rotatably attached to the main body 1 by being fitted in the support hole on the right side of
the lower surface portion. At this time, the right side portion of the amplifier storage portion 5 is
fitted into the notch portion 20.
[0028]
As shown in FIG. 1 and FIG. 9, a pair of left and right rotation angle restricting pins 16 and 16
are provided in a protruding manner on the upper surface portion of the above-mentioned
amplifier storage portion 5. Further, similarly to the upper surface portion of the amplifier
storage portion 5, a pair of left and right rotation angle control pins are provided in a projecting
manner on the lower surface portion of the amplifier storage portion 5. An arc-shaped slit 19 is
formed in each of the support pieces 21 and 22 in each of the reflection plates 10 and 11 around
the rotation support shafts 17 and 18. The rotation restricting pin 16 is fitted into the slit 19.
[0029]
That is, on the slit 19 of the upper support piece 21 of the left reflection plate 10, the rotation
angle control pin 16 on the left side of the upper surface portion of the amplifier storage portion
5 is fitted. In the slit 19 of the lower support piece 22 of the left reflection plate 10, a rotation
angle restriction pin on the left side of the lower surface portion of the amplifier storage portion
5 is fitted. Further, on the slit 19 of the upper support piece 21 of the right reflection plate 11, a
rotation angle control pin 16 on the right side of the upper surface portion of the amplifier
storage portion 5 is fitted. In the slit 19 of the lower support piece 22 of the right reflection plate
11, a rotation angle control pin on the right side of the lower surface portion of the amplifier
storage portion 5 is fitted.
[0030]
The reflection plates 10 and 11 can be rotated relative to the main body 1 by an angle
corresponding to an angle range around the rotation support shafts 17 and 18 of the slits 19
indicated by the arrow C in FIG. It has been made.
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8
[0031]
As shown in FIG. 9, a pair of left and right click stop projections 15, 15 are provided in a
protruding manner on the upper surface portion of the amplifier storage portion 5. As shown in
FIG.
Further, similarly to the upper surface portion of the amplifier storage portion 5, a pair of left
and right click stop protrusions are provided on the lower surface portion of the amplifier
storage portion 5 in a protruding manner. Each of the click stop projections 15 is formed to have
at least two projections 15 a and 15 b at a position on an arc centering on the corresponding
support hole 14. The angle of the protrusions 15a and 15b about the support hole 14
corresponds to the range of angles about the pivots 17 and 18 of the slit 19.
[0032]
At least two click stop grooves are formed in the support pieces 21 and 22 in the reflection
plates 10 and 11, respectively, which are positioned on a circular arc centered on the rotation
support shafts 17 and 18, respectively. The protrusions 15a and 15b of the clickstop protrusion
15 are fitted into these clickstop grooves.
[0033]
That is, the click stop projection 15 on the left side of the upper surface portion of the amplifier
storage portion 5 is fitted in the click stop groove of the upper support piece 21 of the left
reflection plate 10. The click stop protrusion 15 on the left side of the lower surface portion of
the amplifier storage portion 5 is fitted in the click stop groove of the lower support piece 22 of
the left reflection plate 10. Further, the click stop projection 15 on the right side of the upper
surface portion of the amplifier storage portion 5 is fitted in the click stop groove of the upper
support piece 21 of the right reflection plate 11. The click stop protrusion 15 on the right side of
the lower surface portion of the amplifier storage portion 5 is fitted in the click stop groove of
the lower support piece 22 of the right reflection plate 11.
[0034]
Each of the reflection plates 10 and 11 is locked at a plurality of places where the projections of
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the clickstop projections 15 and the clickstop grooves are fitted within a range in which the
reflection plates 10 and 11 can be pivoted with respect to the main body 1 It is supposed to be
[0035]
Then, as shown in FIG. 3, each of the reflecting plates 10 and 11 is in the use position, which is a
position rotated in a direction away from the main body 1 in the left and right direction, thereby
causing the arrows A and As indicated by the arrow B, the sound emitted from each of the
speaker units 7 and 6 is correspondingly reflected and led to the front side.
That is, the sound emitted by the left side speaker unit 7 is reflected by the left reflecting plate
10 and guided to the front side. Further, the sound emitted from the right speaker unit 6 is
reflected by the right reflection plate 11 and guided to the front side.
[0036]
At this time, the three-dimensional sound field formed on the front side of the speaker device has
a substantially mirror image position of the left speaker unit 7 with respect to the left reflector
10 and an approximate mirror image of the right speaker unit 6 with the right reflector 11. It
extends over the mirror image position, and extends approximately twice the distance between
the reflectors 10 and 11. Moreover, the said three-dimensional sound field can change expansion
by changing the angle with respect to the said main-body part 1 of each said reflecting plate
10,11.
[0037]
The rotation angle from the front surface indicated by the arrow C in FIG. 3 of each of the
reflection plates 10 and 11 in the use position is suitably 45 ° to 60 °. The pivotable range of
the reflection plates 10 and 11 with respect to the main body 1 is a range extending from the
position where the front end edge is made to the front of the main body 1 to the use position.
[0038]
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10
In each of the reflection plates 10 and 11, when the above-mentioned use position is made, the
reflection surface portion facing the corresponding speaker units 7 and 6 is substantially
spherical with the center of the speaker units 7 and 6 substantially centered. It is formed in
shape. Therefore, the reflection plates 10 and 11 can concentrate and reflect the sound emitted
by the speaker units 7 and 6 on the front side.
[0039]
Then, as shown in FIGS. 2, 4, 6, 7 and 8, each of the reflecting plates 10 and 11 is turned in the
direction approaching the main body 1 to be in the storage position. The peripheral portions are
butted together, and the speaker units 6 and 7 are housed together with the unit housing portion
4 in a substantially sealed state. At this time, when the signal supply cord 12 is wound around
the cord winding portion 3, the signal supply cord 12 is housed together with the unit housing
portion 4 in the reflection plates 10 and 11.
[0040]
A pair of left and right hooking projections 8 and 9 are provided in a projecting manner on the
front end of the front side of the main body 1. On the other hand, retaining grooves 25 are
formed in the inner side surface portions of the front end edge portions of the respective
reflecting plates 10 and 11 respectively. When the reflecting plates 10 and 11 are turned to the
main body 1 side, the corresponding hooking projections 8 and 9 are engaged with the hooking
grooves 25 and held at the housing position. .
[0041]
In each of the reflection plates 10 and 11, a plurality of bent portions 26 for distortion
prevention are formed. The bent portions 26 are bent in a wave shape so that a plurality of
longitudinal grooves are formed in the vicinity of the substantially central portion of each of the
reflecting plates 10 and 11.
[0042]
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11
When the reflectors 10 and 11 are in the storage position, they store the speaker units 6 and 7
in a substantially sealed state, and the speaker units 6 and 7 can be dust or water droplets in the
open air. Protect from etc. Further, in the state where the reflection plates 10 and 11 are in the
storage position, they cooperate to form a disk-like shape in which the central portion is
expanded to both sides, that is, a so-called tablet-like shape. To achieve good portability.
[0043]
Furthermore, in this speaker device, the signal supply cords 12 can be accommodated in the
reflection plates 10 and 11, and the signal supply cords 12 do not inhibit portability.
[0044]
The speaker device according to the present invention is not limited to the one having the signal
amplification amplifier built-in as shown in the above embodiments, and does not have the signal
amplification amplifier. It is good also as what was accommodated and comprised in the said
main-body part 1 only.
[0045]
As described above, in the speaker device according to the present invention, the pair of left and
right reflectors rotatably supported by the main body portion that holds the pair of speaker units
in the left and right direction apart from each other The sound emitted from each of the speaker
units is correspondingly reflected and guided to the front side by being in the use position which
is a position rotated in a direction away from the main body.
Therefore, these reflectors form a three-dimensional sound field on the front side.
This three-dimensional sound field is wider than the distance between the reflectors.
[0046]
Further, the respective reflecting plates are rotated in a direction approaching the main body
portion, so that the peripheral portions are abutted against each other, and the respective
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speaker units are accommodated in a substantially sealed state. Therefore, these reflectors can
facilitate the portability of the speaker device and protect the speaker units.
[0047]
Further, in the above-mentioned speaker device, each of the reflection plates is formed in a
substantially spherical shape with the reflection surface portion facing the corresponding
speaker unit when the above-mentioned use position is made, with the center of the speaker unit
being substantially centered. In this case, the sound reflected by the reflectors can be
concentrated on the front side, and the three-dimensional sound field formed on the front side
can be made deeper.
[0048]
That is, the present invention is to provide a speaker device capable of performing stereo
reproduction by forming a three-dimensional sound field having a sufficient spread for practical
use while being miniaturized and having good portability.
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