JPH0588089

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DESCRIPTION JPH0588089
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
audio reproduction apparatus such as a radio cassette player (so-called radio cassette player) or a
stereo apparatus, and more particularly to an audio reproduction apparatus capable of rotating
or changing the speaker. For improvement.
[0002]
2. Description of the Related Art As a sound reproducing apparatus capable of rotating a speaker,
for example, there is a radio cassette player as shown in FIG. In the figure, a cassette player 12 is
provided at the center of the front of the apparatus main body 10, and speakers 14 and 16 are
respectively disposed on the left and right thereof. Further, a radio unit 18 is provided at the top
of the cassette player 12, and a CD player 20 is provided at the center of the upper surface of the
apparatus main body 10. A carry handle 22 for carrying, an antenna 24 and the like are also
provided on the upper surface.
[0003]
In the radio cassette player, the apparatus main body 10 is rotatable relative to the base 26 in
the direction of the arrow FQ or FR shown in FIG. Therefore, in the case where the listener 28 is
located on the side of the acoustic device instead of on the front side, the speakers 14 and 16 are
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directed to the listener 28 by rotating the device body 10 in the direction of the arrow FR.
Although this example is an example in which the apparatus main body is driven in the left and
right direction, there are also cases in which the apparatus main body is driven in the vertical
direction.
[0004]
However, in such a conventional technique, it is necessary to perform exceptional acoustic effects
such as powerful and three-dimensional sound reproduction simply by changing the direction of
the speaker. You can not The present invention focuses on these points, and an object of the
present invention is to provide an acoustic reproduction device capable of performing powerful
three-dimensional reproduction.
[0005]
SUMMARY OF THE INVENTION One of the sound reproducing devices according to the present
invention comprises a speaker device provided on the rear side of the device body and a speaker
device rotatably supported with respect to the device body. It is provided with a rotational drive
means, an operation instruction means for instructing rotational operation of the speaker device
as desired, and a drive control means for controlling the rotational drive means based on the
operation instruction by this. In the above-mentioned sound reproducing apparatus, the speaker
apparatus is detachably attached to the apparatus main body.
[0006]
According to the present invention, the speaker device is rotatably supported on the device body.
Then, when a rotation instruction is given, the speaker device is rotated according to the
instruction. When the speaker device rotates, the phase difference between the sound output
from the speaker device and the sound of the other speakers changes, which enables
stereoscopic sound reproduction full of realism. According to another idea, the loudspeaker
device is removed from the device body as desired.
[0007]
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the sound
reproducing apparatus according to the present invention will be described below with reference
to the attached drawings. The same reference numerals are used for the same components as the
above-described conventional example or components corresponding to the conventional
example. First Embodiment As shown in FIG. 3A, the sound reproducing apparatus according to
this embodiment has rear speakers 32 and 34 provided on the left and right of the rear (rear)
cabinet of the apparatus main body 30. ing. The other cassette player 12, the speakers 14, 16,
the radio unit 18, the CD player 20, the carry handle 22, and the antenna 24 are the same as
those of the prior art.
[0008]
FIG. 1 shows the rotational drive of the rear speakers 32 and 34 with respect to the main unit 30
of the apparatus. (A) of the figure, (B) is the figure seen from the arrow F 1 and F2 direction of
FIG. 3 (A), respectively. In these drawings, bearings 38 and 40 are respectively projected and
fixed at the upper and lower positions shown in FIG. 7A inside the end of the rear cabinet 36 of
the apparatus main body 30. The projections of these bearings 38 and 40 The shaft 42 is
rotatably supported by the unit
[0009]
A worm wheel 44 is provided substantially at the center of the shaft 42, and an end of a housing
46 of the speaker 34 is screwed to the upper and lower ends of the shaft 42. That is, when the
shaft 42 rotates in the arrow F3 direction, the housing 46 is also rotated in the arrow F3
direction. A worm gear 48 meshes with the worm wheel 44, and a pulley 52 is provided on a
shaft 50 on which the worm gear 48 is provided. The rotational driving force of the motor 54
installed in the rear cabinet 36 is transmitted to the pulley 52 by the action of the pulley 56 and
the belt 58. The shaft 50 is rotatably supported by a bearing 51 fixed to the cabinet side, and the
motor 54 is also fixed to the cabinet side.
[0010]
That is, the rotational driving force of the motor 54 is transmitted to the shaft 50 by the pulley
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56, the belt 58 and the pulley 52, and the shaft 50 is rotated in the direction of the arrow F4 (see
FIG. 6B). Then, the worm gear 48 rotates in the direction of arrow F5, whereby the worm wheel
44 is decelerated to rotate in the direction of arrow F3, and further, the shaft 42, the housing 46,
and the speaker 34 rotate in the direction of arrow F3. Become.
[0011]
The pulley 52 described above has a configuration in which a large number of holes H are
formed at equal intervals on the circumference as shown in FIG. 6C, and the holes H are detected
by the photo sensor 60. It is supposed to be. That is, when the pulley 52 rotates, the holes H are
sequentially irradiated by the output light of the photosensor 60, and a pulse signal is output
from the photosensor 60 for each hole H. By counting the number of pulses, the amount of
rotation of the pulley 52 and hence the amount of rotation of the speaker 34 can be detected.
The same applies to the speaker 32.
[0012]
Next, the configuration of the drive control means in the present embodiment will be described
with reference to FIG. In the present embodiment, as shown in FIG. 3A, switches S1 to S4 for
instructing rotational driving of the rear speakers 32 and 34 are provided on the upper front side
of the apparatus main body 30. The switches S1 to S4 are connected to control means as shown
in FIG. In the figure, a microcomputer 70 for controlling the operation of the entire apparatus is
provided with a main body drive control unit 72 for controlling the drive of the main units such
as the cassette player 12, the radio unit 18 and the CD player 20 described above. . This is
similar to the usual one.
[0013]
In the present embodiment, an operation mode determination unit 74, a pulse count unit 76 and
a motor drive control unit 78 are further provided. The switches S1 to S4 operated by the
listener are all connected to the operation mode determination unit 74, and the output side of the
operation mode determination unit 74 is connected to the motor drive control unit 78. Further,
an amplifier 80 is connected to the output side of the photo sensor 60 described above, and an
output side of the amplifier 80 is connected to the pulse counting unit 76. The output side of the
pulse counting unit 76 is connected to the motor drive control unit 78, and the output side of the
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motor drive control unit 78 is connected to the motor 54 described above.
[0014]
Among the above components, the switch S1 is a switch for setting the position of the rear
speakers 32 and 34 to 0 degrees, that is, to a state as shown in FIG. 3 (A). The switch S2 is a
switch for turning the positions of the rear speakers 32 and 34 by 90 degrees, that is, 90 degrees
from FIG. 3A, as shown in FIG. The switches S3 and S4 are inching switches, the switch S3 is used
to increase the angle, and the switch S4 is used to decrease the angle.
[0015]
Next, the operation mode determining unit 74 has a function of determining which switch is
operated to determine the operation mode. The pulse counting unit 76 has a function of counting
the number of output pulses of the photo sensor 60. Further, the motor drive control unit 78 has
a function of driving the motor 54 with reference to the count number in the pulse count unit 76
in accordance with the operation mode determined by the operation mode determination unit 74.
[0016]
Next, the overall operation of the embodiment constructed as described above will be described
with reference to FIGS. 2 and 4 as well. The operation of each part of the microcomputer 70 is
shown in FIG. 4. When the rear speakers 32 and 34 are rotated 90 degrees, the rear speakers 32
and 34 are initially in the state of 0 degrees shown in FIG. The case of rotating 90 degrees will be
described. At this time, the listener presses the switch S2 (step SA in FIG. 4). Thus, the operation
mode determination unit 74 of the microcomputer 70 determines the operation mode of 90degree rotation (step SB), and this is output to the motor drive control unit 78.
[0017]
The motor drive control unit 78 drives the motor 54 in response to the input operation mode
(step SC). That is, the rotational driving force of the motor 54 is transmitted to the shaft 42 by
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the drive mechanism of the worm gear 48, the worm wheel 44, the pulleys 52, 56, and the belt
58 shown in FIG. The rotational direction at this time, that is, the rotational direction of the motor
54 is determined corresponding to the operation mode.
[0018]
On the other hand, with the rotation of the pulley 52 accompanying the drive of the motor 54, a
pulse signal is output from the photo sensor 60, which is amplified by the amplifier 80 and
supplied to the pulse count unit 76. The pulse counting unit 76 counts the number of input
pulses (step SD), and the count value is input to the motor drive control unit 78. The motor drive
control unit 78 determines whether the count has reached a value corresponding to the
operation mode, that is, the number of pulses corresponding to 90 degrees of rotation (step SE).
As a result, when it is determined that it has not reached yet, the drive of the motor 54 is
continued (step S
[0019]
The operations of steps SD to SF are repeated, and when the pulse count number reaches a
predetermined value, that is, when the rear speakers 32 and 34 become in the state shown in
FIG. The motor drive control unit 78 instructs the motor 54 to stop driving. As described above,
when the switch S2 is pressed, the rear speakers 32, 34 rotate 90 degrees, and the state shown
in FIG. 3A changes to the state shown in FIG.
[0020]
When the rear speakers 32 and 34 are rotated by 0 degrees, the rear speakers 32 and 34 are in
the state of 90 degrees shown in FIG. The case of returning to the state will be described. At this
time, the listener presses the switch S1 (step SA in FIG. 4). Thus, the operation mode
determination unit 74 of the microcomputer 70 determines the operation mode of 0 degree
rotation (step SB), and this is output to the motor drive control unit 78. The motor drive control
unit 78 performs the same operation as described above except that the rotation direction of the
motor 54 is reverse. As a result, the rear speakers 32, 34 in the state of FIG. 3C are at the
positions shown in FIG.
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[0021]
When the rear speakers 32 and 34 are at arbitrary positions Next, the operation when the rear
speakers 32 and 34 are at desired angular positions will be described. In this case, the listener
presses switch S3 or S4 as desired. For example, it is assumed that the switch S3 is pressed. The
switch S3 is for instructing increase of the angle shown by the arrow F10 in FIGS. 3A and 3B, and
the operation mode determination unit 74 determines the operation mode of the angle increase
and the motor drive control unit 78 Output to The motor drive control unit 78 drives the motor
54 in accordance with the operation mode. For example, motor drive equivalent to 10 counts in
the pulse count unit 76 is performed by one switch operation, and the rotation of the rear
speakers 32 and 34 is performed.
[0022]
Conversely, when the switch S4 is pressed, the rear speakers 32 and 34 rotate in the direction in
which the angle in the opposite direction to the arrow F10 decreases. By such an operation, for
example, when the switch S3 is pressed from the state of FIG. 3A, the state shown in FIG. Further,
when the switch S4 is pressed from the state of FIG. 7C, the state shown in FIG. When the switch
S4 is pressed in the state of FIG. 6A or the switch S3 is pressed in the state of FIG. 6C, the belt 58
slips.
[0023]
Next, comparing the states shown in FIG. 3, in the state of FIG. 3A, since the rear speakers 32 and
34 are directed backward, the sound is output rearward as indicated by the arrow FA. Be done. If
there is a wall (not shown) or the like at the rear, it will be reflected as shown by arrow FB so that
it will be superimposed on the sound output from the front speakers 14 and 16 in the direction
of arrow FC. Become.
[0024]
In the state of FIG. 2B, since the rear speakers 32 and 34 are directed obliquely backward, the
sound is outputted obliquely to the rear as shown by the arrow FD. If there is a wall (not shown)
or the like obliquely backward, it is reflected as shown by the arrow FE, and is superimposed on
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the sound of the arrow FC from the front speakers 14 and 16. Further, in the state of FIG. 6C,
since the rear speakers 32 and 34 are directed to the side, the sound is outputted to the side as
shown by the arrow FF. If there is a wall (not shown) or the like at a distant side position, it will
be reflected as shown by arrow FG, and will be superimposed on the sound of arrow FC from
front speakers 14 and 16.
[0025]
As described above, according to the present embodiment, by changing the rotational positions
of the rear speakers 32 and 34 in various ways, the sounds output from the rear speakers 32 and
34 have different phase differences and the front speakers 14 and 16 have different phase
differences. Will be superimposed on the sound of Therefore, by setting the rotational positions
of the rear speakers 32 and 34 variously in accordance with the music and preferences, it is
possible to reproduce realistic sound with a sense of reality.
[0026]
In the above embodiment, the rotary shafts of the rear speakers 32 and 34 are present in their
housings 46. Alternatively, rotary shafts may be provided in the rear cabinet 36 as shown in FIG.
As shown in the figure, the housing 46 of the rear speaker 34 is supported by an arm 92 of a
shaft 90 which is rotationally driven. The rear speaker 34 is rotated as indicated by an arrow FH
with the rotation of the shaft 90, and is in the position shown by the dotted line in FIG. The same
applies to the rear speakers 32.
[0027]
Second Embodiment Next, a second embodiment of the present invention will be described with
reference to FIGS. 6 to 10. FIG. In the first embodiment, the rear speakers 32 and 34 are fixedly
rotated around the shaft 42. On the other hand, in the second embodiment, the speaker device is
detachable with respect to the device body, and it becomes possible to separate and arrange the
device body from the device body.
[0028]
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FIG. 6 shows the assembled state of the sound reproducing apparatus according to this
embodiment, and the left and right sides of the rear side of the apparatus main body 100
including the CD player, cassette player, tuner, amplifier and the like are shown. The speaker
devices 102 and 104 are rotatably provided. The shafts 106 and 108 serving as the centers of
rotation are U-shaped connected at the upper part, and constitute the carry handle 110. When
the carry handle 110 is removed from the speaker devices 102 and 104, the device body 100
and the speaker devices 102 and 104 can be separated as shown in FIG.
[0029]
FIG. 8 shows a state as viewed in the direction of arrow FJ of FIG. 6, and a gap of ΔH is formed
between the floor surface 112 and the bottom of the speaker devices 102 and 104. Thus, the
rotational movement of the speaker devices 102 and 104 is smoothly performed. The shafts 106
and 108 are fixed at the bottom by screws 114 and 116 so as not to come off.
[0030]
Next, the assembly structure of the speaker devices 102 and 104 with respect to the device main
body 100 will be described. In addition, since it has a symmetrical configuration, the left speaker
device 102 will be described. A bearing portion 122 having an elongated hole 120 is formed to
project at a central position on the rear side of the device body 100, and an elongated hole 124
and a notch 126 are formed on the rear side of the speaker device 102. . Furthermore, a
rotatable wire spring 128 protrudes at a lower side position of the device body 100, and a metal
fitting 130 for stopping the wire spring 128 is provided at a lower side position of the speaker
device 102.
[0031]
At the time of assembly, the wire spring 128 of the apparatus main body 100 is first inserted into
the bracket 130 of the speaker device 102, and the bearing portion 122 is fitted into the notch
portion 126. Then, since the long holes 120 and 124 come into communication, the shaft 106 is
inserted into this and fixed by the screw 114. The same applies to the speaker device 104
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[0032]
Next, referring to FIG. 9, the rotation mechanism of the speaker devices 102 and 104 will be
described. In addition, since it is the structure of left-right symmetry, the speaker apparatus 102
of the left side is demonstrated similarly. FIG. 9 shows the configuration of the mechanical
section as viewed from the direction of the arrow FK in FIG. 6, where (A) shows the state where
the speaker devices 102 and 104 are open and (B) shows the closed state. is there. Moreover, the
state seen from arrow FL of the figure (A) is shown by FIG.
[0033]
In these figures, a worm gear 134 is fixed to the rotation shaft of a motor 132 provided in the
apparatus main body 100, and a worm wheel 136 is engaged with the worm gear 134. A gear
138 is provided on the shaft of the worm wheel 136 so as to be interlocked, and a gear 140 and
a sector gear 142 are engaged with the gear 138. That is, the rotational driving force of the
motor 132 is transmitted to the sector gear 142 via the worm gear 134, the worm wheel 136,
and the gears 138 and 140. The end of the above-described wire spring 128 is fixed to the
substantially rotational center portion of the fan-shaped wick 142 by the fastener 144. In
addition, a stopper 146 is provided at the rear of the speaker device 102 as necessary.
[0034]
The operation of such a mechanism will now be described. When the motor 132 rotates, the
worm gear 134 rotates, and the worm wheel 136 also rotates. Then, the gear 138 (see FIG. 10)
provided on the same shaft is rotated, and the rotational force is transmitted to the sector gear
142 through the gear 140. When the sector gear 142 rotates, the wire spring 28 also rotates.
Since the tip end portion of the wire spring 28 is inserted into the bracket 130 of the speaker
device 102 as described above, the speaker device 102 also rotates as the wire spring 28 rotates.
[0035]
In the state where the speaker device 102 is opened from the device main body 100, as shown in
FIG. 9A, the rotation is stopped by the stopper 146 and the load is absorbed by the wire spring
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128. Further, when the speaker device 102 is closed with respect to the device main body 100, it
is as shown in FIG. 9 (B). In addition, at the time of transition between each state of the figure (A)
and (B), it acts so that the wire spring 128 may slip through the metal fitting 130. As shown in
FIG. Also in this embodiment, sensor means and drive control means as shown in FIG. 2 may be
provided.
[0036]
As described above, according to the present embodiment, the speaker devices 102 and 104 can
face various directions as desired, and if necessary, they can be removed from the device main
body 100 to make a desired arrangement. Because of this, it is possible to change the sound
reflection mode and perform sensible reproduction.
[0037]
<Other Embodiments> The present invention is not limited to the above embodiments, and
includes, for example, the following.
(1) In the above embodiment, the drive motor is provided for each of the left and right speakers,
but may be provided commonly for the left and right speakers. In addition, the left and right
speakers may be linked and driven symmetrically, or may be separately driven independently. (2)
Although the rotation angle is 90 degrees at the maximum in the above embodiment, it may be
set as needed. The same applies to the direction of rotation. The operation mode is 0 degree
instruction, 90 degree instruction, or inching, but this may also be set as needed.
[0038]
(3) In the above embodiment, in the inching operation, the speaker rotation for 10 pulses is
performed by one operation of the switch, but the speaker rotation may be performed while the
inching switch is being pressed. Good. In this case, it is not necessary to detect the amount of
rotation by the photo sensor 60. (4) Although the sensor means for detecting the amount of
rotation is provided in the above embodiment, the amount of rotation may be detected by
measuring the drive time with the timer means.
[0039]
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(5) In the above embodiment, the shafts 106 and 108 for speaker rotation are integrally coupled
to form the carry handle 110. However, various modes are conceivable such as separating the
carry handle and the shaft. Further, as a method of fixing the shafts 106 and 108, there are
various modes such as screwing from the side of the speaker devices 102 and 104 instead of
from the lower side as in the above embodiment. (6) In addition, the speaker rotation can be
performed by remote control, the rotation state of the speaker can be displayed, and the second
embodiment can be applied to the first embodiment to make the rear speaker detachable, which
can be extremely easily realized. is there. Furthermore, the present invention is applicable not
only to stereo reproduction but also to monaural reproduction.
[0040]
As described above, according to the sound reproducing apparatus of the present invention, the
following effects (1) provide the speaker device and rotate it as desired. Therefore, the sound can
be superimposed on the sound of the front speaker with various phase differences, and powerful
three-dimensional reproduction can be performed. (2) By removing the speaker device from the
device main body and setting it as desired, it is possible to change the reflection mode of the
sound and perform a lavish reproduction.
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