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JPH06113386

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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
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DESCRIPTION JPH06113386
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker device capable of changing the angle of a tweeter speaker portion to an appropriate
angle, and to a position adjusting device.
[0002]
2. Description of the Related Art Generally, as a speaker device mounted on a car or the like, a
tweeter speaker unit which is a mid to high sound speaker is incorporated in a woofer speaker
unit which is a low frequency speaker since the occupied area can be reduced. Speaker devices
are known. In this case, in order to provide a good sound field to a listener in a car, for example,
a driver, one side of the woofer speaker portion is pivotally supported to change its angle. This
will be described based on the attached drawings. FIG. 12 shows a top view of the inside of a car
provided with a speaker device, in which a door 3 located on the side of the driver 2 sitting
facing the windshield 1 is The speaker device 4 is embedded toward the 2 side. In this case, one
side of the speaker device 4 is rotatably attached, for example, by the hinge 5, and is angleadjusted to have an appropriate angle θ1 to provide a good sound field toward the driver 2
Configured to earn.
[0003]
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1
By the way, in the above-mentioned configuration, when the speaker device is moved by the
angle θ1, the sound field from the woofer speaker portion having a wide directional
characteristic can be sufficiently satisfactorily improved. Even in some cases, the sound field
from the tweeter speaker with a sharp directional characteristic could not be sufficiently
improved. For example, as shown in FIG. 13 to FIG. 15, the tweeter section of the speaker device
4 is directed upward by, for example, the angle .alpha.1 with respect to the driver to change the
sound field to an optimal state. The speaker unit was integrally formed with the woofer speaker
unit, and the direction of the tweeter speaker unit could not be changed alone.
[0004]
Furthermore, for example, in a general automobile, the speaker devices are disposed to face each
other on the left and right doors of the front, but in this case, particularly, the characteristics of
the high range of the left and right speakers in the driver's seat are remarkable It will be
different. For example, in the case of the right handle specification, the high range characteristic
from the speaker device of the left door is good, but for the speaker device of the right door, it
can be heard from substantially the side, and the high range from this speaker device The
characteristic is so poor that the front sound field is asymmetrical and there is a problem that the
high frequency range sound from the right speaker device can hardly be heard. Therefore, as
disclosed in Japanese Utility Model Application Laid-Open No. 60-111190, a speaker for middle
to high-pitched sound has been proposed to be rotatable around the central axis of a speaker for
low-pitched sound, but in this case, it is extremely complicated. It had become a structure. The
present invention focuses on the problems as described above, and was conceived to solve it
effectively. The object of the present invention is to provide a speaker device capable of changing
the direction of the tweeter portion to an optimum direction, and the position of the speaker
device. It is in providing a regulator.
[0005]
According to a first aspect of the present invention, there is provided a speaker apparatus in
which a tweeter speaker portion is provided at the center of a woofer speaker portion via a
support member in order to solve the above-mentioned problems. The tweeter speaker portion is
rotatably supported by the support member, and a tweeter gear mechanism is formed in the
tweeter speaker portion, and the tweeter drive means is provided to drive the gear mechanism.
[0006]
According to a second aspect of the present invention, there are provided a plurality of speaker
devices, at least one of which is defined in claim 1, a signal generator for supplying a
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2
predetermined signal to the speaker device, and a signal sound emitted from the speaker device.
The frequency characteristics of the plurality of speaker devices are substantially based on the
results of the microphone unit that captures the sound, the comparison and determination unit
that compares and determines the frequency characteristics of the plurality of speaker devices
output from the microphone unit, And a control unit configured to control drive means in the
speaker device so as to be identical.
[0007]
According to the first aspect of the invention, the tweeter speaker portion is rotatably supported
by the woofer speaker portion, and the tweeter speaker portion is driven by moving the tweeter
gear mechanism by driving the tweeter drive means. The direction can be changed to allow the
driver or the like to turn the direction of the tweeter speaker portion in an optimal direction.
According to the second invention, in order to control the direction of the speaker device
according to the first invention, a signal from the signal generation unit is actually emitted from
the speaker device and captured by the microphone unit.
Then, based on the captured signal, the comparison / determination unit determines, for
example, frequency characteristics from the speaker devices arranged on the left and right, and
the control unit drives the drive unit in the speaker device so that these characteristics become
substantially the same. Control the direction of the speaker unit.
[0008]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following is a detailed
description of an embodiment of the speaker apparatus and the position adjusting apparatus
according to the present invention. FIG. 1 is a cross-sectional view showing an embodiment of a
speaker device according to the first invention, FIG. 2 is a layout diagram showing an
arrangement of the speaker device mounted on a car, and FIG. 3 is a tweeter speaker portion of
the speaker device shown in FIG. 4 is a view showing the attachment structure of the tweeter
speaker unit of FIG. 3, FIG. 5 is a plan view showing the attachment state of the speaker device,
FIG. 6 is a side view showing the attachment state of the speaker device, FIG. FIG. 6 is a circuit
configuration diagram of a position adjustment device according to the second invention.
03-05-2019
3
[0009]
As shown in FIG. 2, the speaker devices 6 and 7 of the present invention are embedded, for
example, in both front doors 9 and 10 of the car 8. As shown in FIG. 1, each of these speaker
devices 6 and 7 mainly includes a woofer speaker unit 11 that outputs sounds in the low
frequency range, and a tweeter speaker unit 12 that is mainly disposed at this center and outputs
sounds in the middle and high frequency ranges. And consists mainly of The woofer speaker
portion 11 is covered with a speaker casing 13 whose rear portion is formed in a pyramid shape,
and the front is covered with a highly air-permeable grill 14.
[0010]
A magnet 16 attached to the yoke plate 15 is provided at the base of the woofer speaker 11, and
a frame 17 which is expanded in a conical shape, for example, is attached to the magnet 16. On
the front surface of the frame 17, a cone 18 is formed along the front surface of the frame 17. A
hollow cylinder whose distal end is connected to the distal end of the frame 17 and whose
proximal end is disposed at the center of the magnet 16 It is connected to the outer surface of
19. A voice coil 21 is wound around the base end of the hollow cylindrical body 19, and a voice
signal is passed through the voice coil 21 to vibrate the cone 18 to emit a sound wave. A damper
20 is provided between the outer surface of the hollow cylindrical body 19 and the proximal end
of the frame 17 so as to absorb excessive vibration.
[0011]
Further, one end of the speaker casing 13 is attached to the vehicle body side by two hinges 22
as also shown in FIGS. 5 and 6, and the speaker casing 13 is rotatable around this. A woofer gear
mechanism 23 is provided on the rotating side surface of the speaker casing 13. Specifically, the
gear mechanism 23 is a woofer rack 24 fixed to the outer surface of the casing along the
pivoting direction of the speaker casing 13 and for the woofer meshed with the rack 24 and
rotatably supported on the vehicle body side. The gear 25 is configured. The worm gear 27
attached to the rotation shaft of the woofer motor 26 as woofer driving means is engaged with
the woofer gear 25, and the speaker casing 13 is centered on the hinge 22 by rotating this. It is
configured to be pivotable by an appropriate angle.
03-05-2019
4
[0012]
On the other hand, the tweeter speaker portion 12 is supported by a supporter 29 which is a
support member having a circular arc shape in cross section and fixed to the central portion of
the yoke plate 15 by two screws 28. The tweeter speaker unit 12 has a plate 30 having an arcshaped cross section contacting the inner surface of the arc-shaped supporter 29. The two
magnets 31 and 32 are provided on the plate 30, and a dome-shaped diaphragm 33 is formed at
the tip. The conventional tweeter speaker unit 12 is configured. As shown in FIGS. 3 and 4, two
shafts 34 are provided to project at both ends of the plate 30, and the shafts 34 are screwed to
the tip of the supporter 29 via a spring plate 35. It is attached rotatably. Therefore, the tweeter
speaker unit 12 can be rotated about the shaft 34 as a rotation axis. In this case, the rotation
direction of the tweeter speaker unit 12 and the rotation direction of the speaker casing 13 are
set to be, for example, orthogonal to each other.
[0013]
On the back of the plate 30, a tweeter gear mechanism 37 is provided. Specifically, the gear
mechanism 37 is constituted by a tweeter rack 38 extending in a direction perpendicular to the
rotation axis of the shaft 34, ie, in FIG. 3 and a tweeter gear 39 engaged with the rack 38. It is
done. The central part of the woofer magnet 16 and the yoke plate 15 is removed, and the
tweeter motor 40 is inserted into this part as tweeter drive means, and is attached to the
supporter 29 by two screws 41. The tweeter gear 39 is attached to the rotation shaft of the
tweeter motor 40 which has passed through 29. Therefore, by driving the tweeter motor 40
forwardly and reversely, the tweeter speaker 12 can be turned. A position adjustment device 42
is connected to the speaker devices 6 and 7 configured in this way as shown in FIG.
[0014]
Specifically, the position adjustment device 42 has a signal generation unit 43 that supplies a
predetermined signal such as a high-tone or medium-tone noise signal to the speaker devices 6
and 7, and the signal generation unit 43 emits the signal. The noise signal is configured to be
selectively supplied to each speaker device via the amplifier 44. A microphone unit 45 is
provided to capture the signal sound emitted from each of the speaker devices 6 and 7, and the
microphone unit 45 compares and determines the frequency characteristics of the left and right
speaker devices via the microphone amplifier 46. It is input to the determination unit 47. The
comparison / determination unit 47 is constituted by, for example, a frequency analyzer, and the
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5
output thereof is connected to a control unit 48 constituted by, for example, a microcomputer.
The control unit 48 controls the motor drive unit 50 so that the frequency characteristics from
the left and right speaker devices become substantially the same based on the determination
result input from the comparison and determination unit 47, and Are programmed to be able to
control the rotation of the drive means, such as the woofer motor 26 and the tweeter motor 40.
In this case, only the high-noise noise signal may be output from the signal generation unit 43,
and the direction of only the tweeter speaker unit may be controlled without moving the woofer
speaker unit to improve only the frequency characteristic of the high sound range. . In order to
prevent excessive rotation of the woofer speaker unit and the tweeter speaker unit, a limit switch
(not shown) is provided.
[0015]
Next, the operation of the present embodiment configured as described above will be described.
First, as shown in FIG. 8, the microphone unit 45 is positioned at a position where it is desired to
improve the frequency characteristics of the middle and high tone range, for example, a position
corresponding to the head of the driver sitting in the driver's seat. The top view at this time is
shown in FIG. The installation location of the microphone unit 45 is not limited to the driver's
seat, and may be installed anywhere where it is desired to improve the frequency characteristics.
As described above, when the microphone unit 45 is installed, the medium and treble noise
signal 49 is generated from the signal generation unit 43 according to an instruction from the
control unit 48 of FIG. 7, and this is used as the left speaker device 6 and the right speaker
device 7. , And generates a signal sound from each tweeter speaker unit 12. This signal sound is
captured by the microphone unit 45, and the output thereof is input to the comparison
determination unit 47 via the microphone amplifier 46. Here, the frequency from each tweeter
speaker unit 12 is analyzed, compared and determined, and the determination result is input to
the control unit 48. The control unit 48 inputs this determination result, and adjusts the angle of
the tweeter speaker unit 12 of each of the speaker devices 6 and 7 via the motor drive unit 50 so
that both frequency characteristics become substantially the same. In this case, since the high
range characteristic from the tweeter speaker unit 12 of the right speaker device 7 provided in
the right door is bad as shown in FIG. 9, the angle of this tweeter speaker unit 12 is adjusted to
obtain the high range characteristic It will be improved.
[0016]
Here, the angle adjustment operation of the tweeter speaker unit 12 will be described based on
FIG. 1 and the like. A signal for vertical driving from the motor drive unit 50 (see FIG. 7) is input
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6
to the tweeter motor 40 to rotate it. Thereby, this rotational force is transmitted to the tweeter
rack 38 through the tweeter gear 39. As a result, the tweeter speaker unit 12 pivots up and down
by an angle instructed by the control unit 48 with the shafts 36 at both ends as rotation axes. At
the same time, the horizontal drive signal from the motor drive unit 50 is input to the woofer
motor 26, and by rotating this, the rotational force is transmitted to the worm gear 27, the
woofer gear 25, and the woofer rack It is transmitted to 24. As a result, the woofer speaker unit
11 is rotated about the hinge 22 in the horizontal direction by an angle instructed by the control
unit 48. In this manner, the tweeter speaker portion 12 can be turned in the horizontal direction
and the vertical direction to set the direction of the tweeter speaker portion 12 to the optimum
direction for the driver. In this case, the best angle is set while moving the tweeter speaker unit
so that left and right same frequency characteristics are obtained.
[0017]
The change of the frequency characteristic at this time will be described based on FIG. FIG. 10 (A)
shows the frequency characteristic from the speaker device of this embodiment, and FIG. 10 (B)
shows the frequency characteristic from the conventional speaker device. As apparent from FIG.
10 (B), the output level of the A portion of the high-frequency range having a high frequency is
lowered because the axis of the tweeter speaker portion is deviated with respect to the driver. On
the other hand, as shown in FIG. 10 (A), according to the present embodiment, the output level of
the high frequency range also shows a high value, and it has been found that good frequency
characteristics can be obtained.
[0018]
In the above embodiment, the woofer gear mechanism 23 is provided on the speaker casing 13
and the woofer speaker unit 11 can be rotated, but this is omitted and only the tweeter gear
mechanism 37 is provided. The tweeter speaker unit 12 may be configured to be pivotable only
in the vertical direction. Further, in the present embodiment, the rotation angle of the tweeter
speaker unit 12 can be automatically set to a favorable angle, but the invention is not limited to
this, the woofer motor 26 while emitting a signal of high range from the speaker The tweeter
motor 40 may be controlled by the driver by remote control.
[0019]
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7
Furthermore, as shown in FIG. 1, the tweeter motor 40 is provided by penetrating the center of
the woofer magnet 16 in the present embodiment as shown in FIG. 1. However, the present
invention is not limited thereto. Good. That is, the tweeter motor 40 is attached from the lateral
direction of the supporter 4 penetrating therethrough, and the tweeter gear 39 is provided on
the rotation shaft. Then, the gear 39 and the tweeter rack 38 are engaged with each other. In this
case, the teeth of the tweeter rack 38 are formed toward the back of the tweeter speaker portion.
[0020]
As described above, according to the speaker device and the position adjusting device of the
present invention, the following excellent effects can be exhibited. According to the first aspect of
the invention, the direction of the tweeter speaker can be changed independently without
complicating the structure, and the frequency characteristic particularly in the high range can be
greatly improved particularly in a desired place, and excellent sound Can form a place. According
to the second aspect of the invention, the control of the direction of the tweeter speaker unit
described above can be automatically performed, and the frequency characteristic of the high
range in the desired place can be quickly improved.
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