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JP2001339786

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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 JP2001339786
[0001]
[Technical Field of the Invention] The present invention improves the directivity of the
reproduced sound in the mid-range and the high-range even when the installation place is
mounted in a narrow space such as a vehicle, and reproduces smooth sound in sound quality.
The present invention relates to a full range type speaker device that can be used.
[0002]
2. Description of the Related Art First, the case where a conventional speaker apparatus is
attached to a vehicle will be described.
[0003]
FIG. 4 is a plan view schematically showing a conventional speaker device in a state of being
attached to a part of a door of a vehicle, and FIG. 5 is a door where the woofer is a separate type
speaker device when the speaker device of FIG. 6 is a side view schematically showing the
attached state, and FIG. 6 is attached to a door in the case where the speaker device of FIG. 4 is a
coaxial type speaker device constructed by a structure in which a tweeter is coaxially attached to
a woofer 7 is a side view conceptually showing an improvement of the conventional speaker
apparatus shown in FIG. 5, and FIG. 8 is a specific side view showing the speaker apparatus
shown in FIG. FIG. 9 is an enlarged cross-sectional side view taken along line A-A of the prior art
speaker device shown in FIG. 8, and FIG. 10 is an improved version of the prior art speaker
device shown in FIG. 11 is a front view specifically showing the speaker device shown in FIG. 10,
and FIG. 12 is a cross-sectional side view of the speaker device shown in FIG. 11 along line A-A. It
is.
03-05-2019
1
[0004]
A separate type speaker apparatus 100 in which a woofer and a tweeter are separately
configured and installed in a vehicle in a narrow space where the installation location is narrow
is generally a tweeter on a dashboard or the like (not shown), a woofer 110 is often attached to
the inside of the interior Da of the door D as shown in FIG.
In the case of such a mounting configuration, as shown in FIG. 5, the directivity of the woofer
110 mounted on the door D is bad, and the sound in the middle range becomes extremely poor.
[0005]
Further, in the coaxial type speaker device 200 in which the tweeter 220 is attached to the
center of the woofer 210, as shown in FIG. 6, only the tweeter 220 is attached at an angle in
which it is inclined toward the listener in advance.
This results in an undesirable sound quality in which the listener can hear poor musicality with
enhanced high-pitched sounds.
[0006]
Therefore, in order to improve the sound of the mid range of the woofer 110 of the speaker
device 100 shown in FIG. 5, there is a speaker device 100A in which the acoustic lens 130 is
disposed in front of the woofer 110 as shown in FIG. A specific example of the speaker device
100A will be described with reference to FIG. 8 and FIG.
[0007]
That is, the structure of the acoustic lens 130 mounted in front of the woofer 110 is arranged
parallel to each other at a predetermined interval as disclosed in the publication of Japanese
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2
Utility Model Application Publication No. 64-30992 "Acoustic lens for speaker". The plurality of
slats 131 are configured as a center, and the slats 131 are rotatably attached to the ring-shaped
movable frame 132. The movable frame 132 is rotatably attached to the base frame 133 fixed to
the speaker box B at the outer periphery of the woofer 110 fixed to the speaker box B and
slightly forward.
[0008]
Since the acoustic lens 130 is configured as described above, the angle of the plurality of wing
plates 131 can be adjusted individually, and furthermore, the movable frame 132 to which the
entire wing plate 131 is attached is rotated with respect to the base frame 133 It can be done.
Therefore, by adjusting the direction of the wing plate 131, the direction of the midrange sound
emitted from the woofer 110 can be changed toward the listener.
[0009]
Further, as shown in FIG. 10, the acoustic lens 230 is disposed in front of the tweeter 220 to
improve the directivity of the sound of the high frequency range of the speaker device 200
shown in FIG. There is a speaker device 200A that bends high-pitched sound with an acoustic
lens 230 disposed forward and directs it to a listener. A specific example of the speaker device
200A will be described with reference to FIG. 11 and FIG.
[0010]
That is, as disclosed in the publication of Japanese Patent Application Laid-Open No. 11-220790
"Speaker", the tweeter 220 is attached to the center of the woofer 210, and the acoustic lens 230
attached to the front is attached to the speaker device 200A. The acoustic lens 230 is
constructed centering on a plurality of wing plates 231 arranged in parallel with each other at a
predetermined interval, and the wing plates 231 are held. A ring-shaped movable frame 234 is
rotatably mounted at a central portion of a dome-shaped grille 233 held by the frame 232 so as
to be rotatable. Therefore, by adjusting the direction of the wing plate 131, the direction of the
midrange sound emitted from the woofer 110 can be changed toward the listener. Therefore,
according to the speaker device 200A, by changing the direction of the wing plate 231 of the
acoustic lens 230, the directivity of the sound in the high range of the tweeter 220 can be
directed to the direction of the listener, as shown in FIG. It is possible to improve the directivity
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3
of the high-pitched sound than the speaker device 200.
[0011]
As described above, in the speaker apparatus of the prior art, an acoustic lens is provided in front
of the tweeter or the woofer and the tweeter, and the midrange sound emitted from the woofer
by the acoustic lens is provided. And it tries to bend the sound of the high range emitted from the
tweeter toward the listener. In particular, since the high-range sound emitted from the tweeter
has strong directivity, many tend to bend the direction using an acoustic lens. Thus, its directivity
characteristics are improved.
[0012]
However, even if the directivity characteristic is improved, if the acoustic lens is present in front
of the tweeter or the woofer and tweeter, the sound hits the acoustic lens and the reflected sound
is produced, so that the sound in the high range becomes dull, etc. The sound is degraded.
[0013]
The present invention is intended to solve such a problem, and it is an object of the present
invention to obtain a speaker device capable of improving the overall directivity characteristics
while maintaining good sound quality without deterioration.
[0014]
Therefore, in the invention according to claim 1, the speaker device is disposed with a full range
type of woofer and a predetermined loudness angle in front of the central portion of the woofer.
A tweeter and an acoustic lens which is disposed in front of the woofer at a portion excluding the
tweeter portion, and whose discharge direction is inclined in the same direction as the discharge
angle of the tweeter. There is.
[0015]
And in the invention according to claim 2, the speaker device is mounted to the woofer of the full
range type, the bearing provided to project forward from the diaphragm of the woofer at the
center of the woofer, and the universal joint structure to the bearing A tweeter, and an acoustic
lens attached to the bearing and disposed forward of the woofer at a portion excluding the
tweeter portion, and having an acoustic lens inclined in the same direction as that of the tweeter.
And solve the problem.
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[0016]
In the third aspect of the present invention, the acoustic lens in the speaker device according to
the second aspect comprises a plurality of vanes parallel to each other, and the angles of the
vanes are all variable in the same direction by the connecting mechanism. It is characterized in
that it is configured to be able to.
[0017]
Therefore, according to the speaker apparatus of the first aspect of the present invention, the
tweeter does not have an acoustic lens in front of the tweeter, direct the tweeter in a
predetermined vocalization direction, and the sound on the woofer side which can not move can
be directed to the tweeter by the acoustic lens. Since the voice can be directed to the voice, the
sound of the full range of the speaker device can be delivered in the predetermined voice
direction.
[0018]
Then, according to the speaker device of the second aspect of the present invention, the turning
angle and the turning of the tweeter and the acoustic lens can be changed, so the same sounding
direction as the sounding direction of the high range sound directly emitted from the tweeter The
midrange and treble tones on the woofer side can be directed in the direction.
[0019]
Furthermore, according to the speaker apparatus of the invention described in claim 3, in
addition to the function of the speaker apparatus of the invention set forth in claim 2, in all the
slats constituting the acoustic lens, in the middle range and high range of the woofer side. Sound
can be aligned and directed in a predetermined voicing direction.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION A speaker device of the present invention will
be described below with reference to the drawings.
[0021]
1 is a front view of a speaker device according to an embodiment of the present invention, FIG. 2
is an enlarged cross-sectional side view of the speaker device shown in FIG. 1 along line A-A, and
FIG. 3 is a speaker shown in FIGS. The acoustic lens of the structure different from the acoustic
03-05-2019
5
lens used for the apparatus is shown, the figure A is its front view, and the figure B is a side view
seen from the left side of the figure A.
[0022]
In FIG. 1 and FIG. 2, the code | symbol 1 generally points out the speaker apparatus of one
embodiment of the present invention.
The speaker device 1 includes a woofer 10, a tweeter 20, an acoustic lens 30A, a tweeter 20, a
bearing device 40 for the acoustic lens 30A, and a rectifying plate 50.
[0023]
The woofer 10 is a general full-range type speaker, and is disposed with a frame 11 of a coneshaped structure, a pole piece 12 fixed to the bottom of the frame 11, and a predetermined gap
in the pole piece 12 A yoke 13 fixed to the bottom of the frame 11, a magnet 14 mounted on the
pole piece 12, a voice coil 16 inserted and mounted in the gap and supported by the damper 15
on the frame 11, and The diaphragm 17 is fixed to the end of the voice coil 16 and the opening
of the frame 11, and an audio signal input terminal 18 and the like.
[0024]
A tweeter 20 is disposed in front of the central portion of the woofer 10.
The tweeter 20 is supported by a bearing device 40 disposed at the center of the woofer 10.
The bearing 41 has a cylindrical structure that is open at the upper side and closed at the lower
end face, and the closed end face side is fastened to the end face of the pole piece 12 by a bolt
42 inserted from the back face of the pole piece 11.
In this fastened state, the height (or length) of the bearing 41 is such that the upper open end
thereof is at a position projecting forward from the surface of the diaphragm 17 of the woofer 10
There is.
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The pivot shaft 43 is attached to the opening of the bearing 41 having such a structure.
The attachment structure of the pivot shaft 43 is a so-called universal joint structure.
The pivot shaft 43 is fixed to the frame 22 on the back of the tweeter 20.
[0025]
The tweeter 20 is a speaker that emits a high-pitched sound with a small-diameter dome-shaped
diaphragm 21.
[0026]
An acoustic lens 30A is disposed on the outer periphery of the tweeter 20.
The acoustic lens 30A comprises a plurality of blades 31 parallel to one another, and is attached
to the support frame 33 so that the angles of the blades 31 can all be varied in the same
direction by the connecting mechanism 32, and the support frame 33 is tweeter 20. The frame
22 is fixed.
Each of the wing plates 31 has a different length, and in the acoustic lens 30A of the embodiment
shown in FIG. 1, a circular hole is formed along the circular opening of the tweeter 20 as a whole,
and the outer periphery is elliptical Aligned to the length formed in the shape.
In particular, in the illustrated example, a plurality of blades 31 may be arranged so that the
major axis of the oval is in the horizontal direction so that a wide range of sound that is going to
spread laterally can be directed upward or downward by each blade 31. Are aligned.
The acoustic lens 30 </ b> A aligns and turns all the blades 31, and the direction of its voice is
generally used in accordance with the direction of the tweeter 20 's voice.
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[0027]
The current plate 50 is composed of three plates 51 arranged at an angular interval of 120
degrees, and is fixed to the frame 22 of the tweeter 20.
The rectifying plate 50 has the function of adjusting the disturbance of the high range sound
emitted from the tweeter 20.
[0028]
Next, the function of the speaker device 1 of the present invention will be described. As is clear
from the above description, in the speaker device 1, the acoustic lens 30A is present only in front
of the woofer 10, and the high-range sound from the tweeter 20 can be directly emitted. Then,
when the tweeter 20's vocalization direction is changed, normally, the vocalization direction of
the acoustic lens 30A is also automatically directed to the same vocalization direction, so that the
midrange and high tone of the woofer 10 side in the direction in which the tweeter 20 faces. I
can direct the sound.
[0029]
The discharge directions of the tweeter 20 and the acoustic lens 30A can be changed not only in
a single plane but also at an elevation angle because the bearing device 40 has a universal joint
structure. That is, since so-called swing motion can be performed, even if the distance between
the speaker device 1 and the listener is short, directivity of the sound of the entire band emitted
from the speaker device 1 is directed to the listener be able to. Moreover, since it is comprised so
that the direction of all the slats 31 can be interlockedly changed, it can adjust the discharge
direction of the sound emitted from the woofer 10 as needed.
[0030]
FIG. 3 shows an acoustic lens 30B of a different shape. The entire outer shape of the acoustic
lens 30B is rectangular, and the function is the same as that of the acoustic lens 30A shown in
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FIG. As shown in FIG. B, the base end of the wing plate 31 is connected to the fixed connection
plate 34, and the tip end is connected to the movable connection plate 35, and the tip end is
rotated in the vertical direction indicated by the arrow Y. It consists of a structure.
[0031]
In the above description, the speaker device embedded and used in the lining of the door of the
vehicle is taken and explained, but the speaker device 1 of the present invention is not limited to
the one for vehicles, and is used for various other applications. It should be noted that it is
particularly useful in places where the space used is relatively small.
[0032]
As described above, according to the speaker device of the present invention, the directivity is
improved in both the middle range and the high range, and the sound quality can be reproduced
with smooth and smooth sound.
[0033]
Brief description of the drawings
[0034]
FIG. 1 is a front view of a speaker device according to an embodiment of the present invention.
[0035]
FIG. 2 is an enlarged cross-sectional side view on line AA of the speaker device shown in FIG. 1;
[0036]
FIG. 3 shows an acoustic lens having a structure different from that of the acoustic lens used in
the speaker device shown in FIGS. 1 and 2. FIG. A shows its front view, and FIG. B shows it from
the left side of FIG. Side view.
[0037]
FIG. 4 is a plan view schematically showing the conventional speaker device attached to a part of
a door of a vehicle.
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[0038]
5 is a side view conceptually showing a state in which the woofer is attached to the door when
the speaker device of FIG. 4 is a separate type speaker device. FIG.
[0039]
6 is a side view conceptually showing a state where it is attached to a door in the case where the
speaker device of FIG. 4 is a coaxial type speaker device configured to have a structure in which
a tweeter is coaxially attached to a woofer.
[0040]
FIG. 7 is a side view conceptually showing the improved speaker device of the prior art speaker
device shown in FIG. 5;
[0041]
8 is a front view specifically showing the speaker apparatus shown in FIG.
[0042]
9 is an enlarged cross-sectional side view of the conventional speaker device shown in FIG. 8
along line A-A. FIG.
[0043]
FIG. 10 is a side view conceptually showing the improved speaker device of the prior art speaker
device shown in FIG. 6;
[0044]
11 is a front view specifically showing the speaker device shown in FIG.
[0045]
12 is a cross-sectional side view of the speaker device shown in FIG. 11 along the line A-A.
[0046]
Explanation of sign
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10
[0047]
DESCRIPTION OF SYMBOLS 1 ... Speaker apparatus of 1 embodiment of this invention, 10 ...
Woofer, 11 ... Frame, 12 ... Pole piece, 17 ... Diaphragm of Woofer 10, 20 ... Tweeter, 21 ...
Diaphragm of tweeter 20, 22 ... Frame, 30 ... Acoustic lens, 31 ... Feather plate, 40 ... Bearing
device, 41 ... Bearing, 43 ... Rotating shaft
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