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JPS62269597

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DESCRIPTION JPS62269597
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker device in a stereophonic sound device, and more particularly to a speaker device capable
of setting the radiation direction of the speaker to a desired direction. [Prior Art] Conventionally,
as a speaker device of this type, for example, FIG. 5 described on page 44 of a document entitled
"Speaker & Enclosure Encyclopedia" (issued in August 54, Seibundo Shinko Co., Ltd.). There was
something as shown in. The figure shows a front view of the speaker device. In the figure, (1) is
the upper cabinet of the speaker device, (2) is the lower cabinet of the speaker device, (3) is the
high sound speaker attached to the upper cabinet (1), (4) is the lower cabinet (2) Is a speaker for
bass attached to the. A conventional speaker device having such a configuration. There is also a
so-called combined (multi-way) system consisting of the spinners (3) and (4), each housed in
separate upper cabinet (1) and lower cabinet (2). Also, in this device, the position of the upper
cabinet (1) is fixed or movable with respect to the lower cabinet (2). [Problems to be Solved by
the Invention] Since the conventional speaker device is configured as described above, when the
upper cabinet is fixed, the radiation direction of the sound in the high sound speaker housed in
the upper cabinet is fixed. It is difficult to change the direction freely, and even if the upper
cabinet is not fixed, it takes time to change its orientation, and it is the best sound suitable for the
source of music to be played. There was a problem that it was difficult to get a place easily. The
present invention has been made to solve the above-mentioned problems, and a speaker device
capable of easily setting the radiation direction of the sound of the speaker stored in the upper
cabinet to any direction at any time. The aim is to get [Means for Solving the Problems] The
speaker device according to the present invention comprises a first cabinet containing a first
speaker and a mechanism for transmitting a rotational force driven by a motor, and a second
cabinet containing a second transmission mechanism. When the second cabinet is set to the
designated rotational position to change the direction of the sound of the second cabinet while
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accommodating the speaker, the controller starts the motor and operates the transmission
mechanism to operate the transmission mechanism. The radiation direction of the sound of the
speaker 2 is changed, and when the designated rotational position is reached, the rotation of the
motor is stopped.
[Control unit according to the present invention, responds to an instruction to change the
orientation when changing the radiation direction of the sound of the second speaker associated
with the first speaker to enhance the sound effect. Drive the motor. When the second speaker is
set in a desired direction, the motor is stopped. Hereinafter, an embodiment of the present
invention will be described with reference to the drawings. FIG. 1 shows a cross-sectional view of
the speaker device of the present invention. In the figure, (10) is a motor, and a small AC servo
motor, a DC servo motor, or a stepping motor is used. (11) is a gear connected to the rotation
shaft of the motor (10), (12) is meshed with the gear (11), a gear having a larger radius and
number of teeth, (13) is one end of the gear (12) The other end is fixed to the upper cabinet (1),
the rotating shaft (14) is attached to the lower cabinet (2), and the bearing for supporting the
rotating shaft (13), (18) the motor (10) ) Is fixed to the lower cabinet (2). (20) is a sensor that
detects the rotation angle of the gear (12). It has a light emitting part consisting of a light
emitting diode and a light receiving part consisting of a phototransistor, and the light of the light
emitting part is emitted by the reflector stuck to the lower surface of the gear (12) and received
by the light receiving part , 12 in the lower cabinet (2) and opposite the lower surface of the gear
(12). (30) is a control device connected to the sensor (20) and the motor (10), mounted on the
side wall of the lower cabinet (2), counting, for example, pulses of the output signal of the sensor
(20) It controls the operation of the motor (10) according to the number, and constitutes a
control device together with the sensor (20). (100) is a drive mechanism, and includes a gear
(11), a gear (12), a rotating shaft (13) and a bearing (14). In this embodiment, the first speaker is
a speaker (4), the second speaker is a speaker (3), the first cabinet is a lower cabinet (2), and the
second cabinet is an upper cabinet (1). . The operation of the loudspeaker apparatus of the
present invention having such a configuration will be described below. By inputting a direction
change command to the control device (30), the motor (10) is energized, for example, when it
starts rotating in the clockwise direction, its rotational force is transmitted to the gear (11), the
gear (12) and the rotating shaft (13 The upper cabinet (1) is rotated clockwise to change the
direction of the sound emission surface of the speaker (3).
The rotation of the gear (11) is detected by the sensor (20) and its output signal is directed to the
control bag [(30). The controller (30) stops the rotation of the motor (10) when the pulses of the
output signal of the sensor (20) reach a number corresponding to the orientation of the upper
cabinet (1). In addition to the above, the control device (30) is also a control device when the
upper cabinet (1) and the lower cabinet (2) are aligned in the same direction, or when the
maximum rotation angle of the upper cabinet (1) is specified. Do. In the embodiment shown in
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FIG. 1, the sensor (20) is provided opposite to the gear (12), but as shown in FIG. 2, the sensor
(20) is provided on the upper surface of the lower cabinet (2). It is possible to install and attach a
reflection part to the lower part of the lower cabinet (2) so as to directly detect the rotational
position of the upper cabinet (1) as in the embodiment shown in FIG. In the embodiment shown
in FIG. 1, the sensor (20) is provided opposite to the gear (12), but the sensor (20) is provided
opposite to the rotation shaft (13), and the rotation shaft (13) is installed. ), And the rotational
position of the rotary shaft (13) may be detected as in the embodiment shown in FIG. In the
embodiment shown in FIG. 1, although the case of two sensors (20) has been described, a
plurality of these sensors may be provided, corresponding to the setting position of the rotation
angle of the upper cabinet (1) The number can be selected appropriately. In the embodiment
shown in FIG. 1, the case where the sensor (20) is formed of an optical element has been
described, but the sensor may be detected electromagnetically or electrostatically. In the
embodiment shown in FIG. 1, the rotational force of the motor (10) is transmitted to the rotating
shaft (13) via the gear (11) and the gear (12), but the number of gears and the reduction ratio
are appropriate Alternatively, the gear may be driven by a belt instead of such a gear, and the
rotary shaft (13) may be shared with the rotary shaft of the motor. In the embodiment shown in
FIG. 1, the control device (30) is installed in the lower cabinet (2). However, as shown in FIG. 3,
the control device (30) may be installed outside the control cabinet (2). In this case, the viewer
may connect the operation unit (31) to the control device (30) and input a direction change
command to the control device (30) through the operation unit (31). Further, the connection
between the control device (30) and the operation unit (31) may be a wire as shown in the
drawing, or may be wirelessly connected by light or ultrasonic wave.
In the embodiment shown in FIG. 1, the upper cabinet (1) and the lower cabinet (2) are
respectively one, but as shown in FIG. May be commonly controlled. Further, in the embodiment
shown in FIG. 1, the lower cabinet (2) and the upper cabinet (1) are respectively the bass and
treble speakers of a specific program, but the present invention is limited to such a configuration
Instead, they may reproduce audio signals of separate channels, and the number of stacked
speaker cabinets may be two or more. As described above, even if the embodiment shown in FIG.
1 is modified and changed as described above, the same effects as the embodiment shown in FIG.
1 can be obtained. As described above, according to the present invention, since the direction of
emission of the sound of the second speaker related to the first spinner is driven by the motor
and set to a desired direction, The setting operation for selecting the radiation direction of the
sound of the speaker can be simplified as needed by the viewer, and the effect of facilitating the
sound field creation processing for enhancing the acoustic effect is exhibited.
[0002]
Brief description of the drawings
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[0003]
FIG. 1 is a cross-sectional view showing a structure of a speaker device according to an
embodiment of the present invention, FIG. 2 is a cross-sectional view showing a structure of a
speaker device according to a second embodiment of the present invention, and FIG. FIG. 4 is a
layout diagram showing a speaker apparatus according to the third embodiment, FIG. 4 is a
layout diagram showing a layout of the speaker apparatus according to the fourth embodiment
of the present invention, and FIG. 5 is a layout diagram showing a layout of the conventional
speaker apparatus .
In the figure, (1) is an upper cabinet (second cabinet), (2) is a lower cabinet (first cabinet), (3) and
(4) are speakers (second speaker, first speaker), ( 10) is a motor, (11) is both cars, (20) is a
sensor, (30) is a control device, and (100) is a drive mechanism. In the drawings, the same
reference numerals indicate the same or corresponding parts.
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