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JP2005322987

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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 JP2005322987
PROBLEM TO BE SOLVED: To provide a composite speaker device capable of obtaining a desired
sound field without distortion of sound waves emitted from a tweeter part. SOLUTION: In a
composite type speaker device 10 in which a tweeter unit 15 is disposed on the sound emitting
side of a main speaker unit 11, a sound which is disposed on the sound emitting side of the
tweeter unit 15 and which is emitted from the tweeter unit 15 is predetermined. The reflecting
plate 31 is provided so as to be reflected in a direction, and the reflecting plate 31 is rotatably
attached to the tweeter unit 15. [Selected figure] Figure 2
Combined type speaker device
[0001]
The present application belongs to the technical field of a composite type speaker device which is
used for various audio devices and in which a tweeter portion is disposed on the sound emitting
side of a main speaker unit.
[0002]
Heretofore, this type of composite speaker apparatus is disclosed, for example, in Patent
Document 1.
The composite type speaker device 1 has a main speaker unit 2 as shown in FIG. 1, and the main
speaker unit 2 includes a speaker frame 3 and a vibrating portion 4 held by the speaker frame 3
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in a suspended state. A magnetic circuit unit 5 is provided.
[0003]
The tweeter unit 7 is fixed to the center pole 6 of the yoke in the magnetic circuit unit 5, and a
reflecting plate for reflecting the sound emitted from the tweeter unit 7 in a desired direction in
front of the tweeter unit 7. 8 are fixed at an angle. Patent document 1: JP-A-2002-209293
[0004]
By the way, in the conventional composite type speaker device 1 shown in FIG. 1, since the
reflection plate 8 is inclined and fixed in front of the tweeter unit 7, depending on the riding
position, the composite type speaker device 1 is The sound wave emitted from the tweeter unit 7
may be distorted since the position is deviated from the front, and it is difficult to obtain a
desired sound field in the vehicle compartment. Therefore, the conventional composite type
speaker device 1 has a low degree of freedom in the mounting position and the mounting angle
since the reflecting plate 8 is mounted in a fixed state, and it is difficult to obtain a desired sound
field particularly when it is used for vehicle mounting Met.
[0005]
The present application has been made in consideration of the above circumstances, and an
example of the subject is to provide a composite speaker device capable of obtaining a desired
sound field without distortion of a sound wave emitted from a tweeter. It is.
[0006]
In order to solve the above-mentioned problems, a composite type speaker device according to
claim 1 is a composite type speaker device in which a tweeter portion is disposed on the sound
emitting side of the main speaker unit, and is disposed on the sound emitting side of the tweeter
portion A reflecting plate for reflecting the sound emitted from the tweeter portion in a
predetermined direction is provided, and the reflecting plate is rotatably attached to the tweeter
portion.
[0007]
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An embodiment of a composite speaker device according to the present application will be
described based on the drawings.
The embodiment described below shows an example in which the composite speaker device
according to the present invention is applied to, for example, an on-vehicle speaker mounted on a
vehicle such as a car.
[0008]
Specifically, the composite speaker device in the present embodiment is a so-called two-way type
cone speaker configured to be attachable to a side door of a vehicle.
[0009]
First, the configuration of the composite speaker device according to the present embodiment
will be described with reference to FIGS. 2 and 3.
2 is a cross-sectional view of the composite speaker device in the present embodiment, and FIG. 3
is a front view of FIG.
[0010]
As shown in FIG. 2, the composite speaker device 10 has a main speaker unit 11, and the main
speaker unit 11 includes a speaker frame 12 and a vibrating portion 13 held by the speaker
frame 12 in a suspended state; A magnetic circuit unit 14 is provided.
The tweeter unit 15 is disposed on the side of the sound emission (front side) of the main
speaker unit 11.
[0011]
The speaker frame 12 is a member for holding the vibrating portion 13 and the magnetic circuit
portion 14 and is formed in a substantially disk shape, and the hole 12a for adjusting the back
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pressure generated by the vibration of the diaphragm 16 is a necessary place Many are provided.
[0012]
At the front opening of the speaker frame 12, the fixing surface 18 of the edge 17 bonded to the
front opening (upper side in FIG. 2) of the diaphragm 16 and the outer peripheral part of the
damper 20 bonded to the outer periphery of the voice coil bobbin 19 are fixed. The surface 21
and the like are formed.
[0013]
At the front opening edge of the speaker frame 12, as shown in FIG. 3, a plurality of (for example,
four) cutouts 22 extend in the circumferential direction to attach to a counterpart member, for
example, a side door of a vehicle. Are formed at equal intervals.
[0014]
In addition, the above-described magnetic circuit unit 14 is fixed to the rear end surface 23 of the
speaker frame 12.
For example, a plated steel plate, a resin member, an aluminum die-cast member or the like is
used as a material of the speaker frame 12, and in the case of a plated steel plate, pressing is
performed. It is formed by die casting or the like.
[0015]
The vibrating portion 13 is configured of the diaphragm 16, the voice coil 24, the edge 17, the
damper 20, and the like.
[0016]
The diaphragm 16 radiates vibration converted into mechanical vibration from the electrical
input signal input to the voice coil 24 as sound according to the input signal, and has a
substantially truncated conical shape, and the material is, for example, On the vibrating plate,
either a heat-pressed natural fiber or chemical fiber vibrating plate is laminated via a film.
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[0017]
The central portion of the diaphragm 16 is adhesively fixed to the upper end of the cylinder of
the voice coil bobbin 19, and the inner peripheral portion of the edge 17 is adhesively fixed to
the front opening of the diaphragm 16. Is adhesively fixed to the fixed surface 18 of the front
opening of the speaker frame 12.
[0018]
The outer periphery of the voice coil bobbin 19 to which the diaphragm 16 is fixed is adhesively
fixed to the inner peripheral portion of the damper 20, and the outer peripheral portion of the
damper 20 is adhesively fixed to the fixing surface 21 of the speaker frame 12.
Therefore, the diaphragm 16 is held by the edge 17 and the damper 20 in a suspended state on
the speaker frame 12.
[0019]
The edge 17 is formed in an annular shape, and is a support member adhered to the front
opening edge of the diaphragm 16 to support the diaphragm 16 and has a function of restoring
to a predetermined position when the diaphragm 16 vibrates. For example, thin cloth, urethane,
rubber or the like is used as the material of the edge 17 and is formed by molding and
processing these.
[0020]
The damper 20 is a support member that supports the diaphragm 16 so that the diaphragm 16
adhesively fixed to the voice coil bobbin 19 moves following the vibration of the voice coil
bobbin 19 and is formed in an annular shape and has a wave-shaped cross section. It is done.
As a material of the damper 20, for example, resin, blended yarn, or the like is used.
[0021]
The magnetic circuit unit 14 includes a yoke 25, a magnet 26, a center piece 27, and the like.
The yoke 25 is attached to the upper surface of the magnet 11, and the center piece 27 is
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attached to the lower surface of the magnet 26.
[0022]
Next, the configuration of the tweeter unit 15 will be described.
[0023]
The tweeter unit 15 is mounted on the protrusion 27 a of the center piece 27 via a connecting
portion 28 and a rotation mechanism 40 described later.
The tweeter unit 15 has a reflecting plate 31 as shown in FIG. 3 and FIG. 4. The reflecting plate
31 is a plate for reflecting and guiding the sound output from the tweeter unit 15 in a
predetermined direction. A curved portion 32 which curves in the horizontal direction is formed
integrally with the reflection plate 31 at the top and bottom. For example, a resin or the like is
used as a material of the reflection plate 31.
[0024]
The tweeter unit 15 is a speaker for high frequency range, and as shown in FIG. 4, is composed
of a diaphragm 33, a magnetic circuit unit 34 and the like.
[0025]
The magnetic circuit unit 34 is configured of a yoke 35, a magnet 36, a center piece 37, and the
like.
[0026]
Next, the rotation mechanism 40 of the reflecting plate 31 will be described.
[0027]
The rotation mechanism 40 holds the reflection plate 31 rotatably in both forward and reverse
directions as shown in FIG. 2, and the outer cylinder 41 shown in FIGS. 5 (A) and 5 (B) and the
outer cylinder 41 are fitted. It is comprised from the inner cylinder 50 grade | etc., Shown to FIG.
6 (A) and (B) which hold | maintains the cylinder 41 rotatably.
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[0028]
The outer cylinder 41 includes a flange portion 42 fixed to the bottom surface of the reflecting
plate 31 as shown in FIGS. 5A and 5B, a body portion 43 integrally formed with the flange
portion 42, and the body portion 43. The leg portion 44 is formed integrally with the portion 43
and formed with a plurality of resilient pressing pieces 44a in the circumferential direction, the
projecting portion 45 projecting in the central direction from the inner peripheral surface of the
trunk portion 43, and the upper surface of the flange portion 42 And the two electrode parts 46
attached to.
[0029]
The inner cylinder 50 is formed at the upper part as shown in FIGS. 6A and 6B, and a gear
portion 51 to which the pressing piece 44a of the outer cylinder 41 is in pressure contact, and an
outer cylinder formed on the inner peripheral surface of the gear portion 51. A stopper 52 for
locking the projecting portion 45 of 41 and a fixing portion 53 fixed to a hole formed in the
connecting portion 28 and the projection 27 a of the center piece 27 are configured.
[0030]
Therefore, when the outer cylinder 41 of the rotation mechanism 40 rotates with respect to the
inner cylinder 50 by rotating the reflection plate 31 and the outer cylinder 41 rotates more than
a predetermined angle, the projection 45 engages with the stopper 52 of the inner cylinder 50. It
is stopped and further rotation is blocked.
As a result, the lead wire 55 (shown in FIG. 2) connected to the electrode portion 46 is not
forcibly twisted, and disconnection of the lead wire 55 can be prevented in advance.
[0031]
Further, since the pressing piece 44a of the outer cylinder 41 is in pressure contact with the gear
portion 51 of the inner cylinder 50 and rotates, when the reflecting plate 31 is rotated to a
desired rotation angle, as shown in FIG. Since 44a is fitted and positioned between the gear
portions 51, it is possible to prevent the reflection plate 31 from rotating unexpectedly.
[0032]
Here, for example, the composite speaker device 10 in the present embodiment is the composite
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speaker device according to the present application, the tweeter unit 15 is the tweeter portion
according to the present application, the reflection plate 31 is the reflection plate according to
the present application, and the bending portion 32 is the present application. The projecting
portion 45 and the stopper 52 constitute a rotation preventing mechanism according to the
present invention, and the gear portion 51 of the inner cylinder 50 and the leg portion 44 of the
outer cylinder 41 constitute a positioning mechanism according to the present application.
[0033]
As described above, in the present embodiment, the reflection plate 31 is configured to be
rotatable by the rotation mechanism 40, and a high sound pressure level can be obtained by
adjusting the angle of the bending portion 32 as shown in FIG.
[0034]
The effects of the present application will be described below using data obtained when the
composite speaker device 10 according to the above-described embodiment is prototyped and
measured.
[0035]
FIG. 9 shows the measurement result when the frequency characteristic in the frequency range
of 10 Hz to 50000 Hz is measured by the conventional composite speaker device, and FIG. 10 to
FIG. 12 measure the frequency characteristic by the composite speaker device 10 according to
the above embodiment. It shows the measurement results of the day.
[0036]
That is, FIG. 9 shows sound pressure levels when the reflector is inclined at 0 °, 30 °, 60 ° in
the conventional composite speaker device.
[0037]
Further, FIG. 10 shows a sound pressure level in which the reflection plate 31 is in the direction
(0 °) shown in FIG. 3 in the composite speaker device 10 according to the embodiment, and FIG.
3A and 3B show sound pressure levels obtained by rotating the reflector 31 by 30 ° with
respect to the perpendicular lines in the directions A and B of FIG. 3, and FIG. 12 shows the
reflector 31 of the composite speaker device 10 according to the embodiment. The sound
pressure level rotated 60 degrees with respect to the perpendicular line of A direction and B
direction is shown.
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[0038]
(Measurement Results) As can be seen from FIG. 9, when the reflector 31 is installed in a fixed
state, the sound pressure level drops sharply at 30 ° and 60 ° at a frequency of 15000 Hz or
more, and the high frequency characteristics deteriorate. In addition, in order to change the
sound pressure level, it is necessary to change the mounting angle of the reflection plate 31.
[0039]
On the other hand, in the composite speaker device 10 according to the present embodiment, the
sound pressure level does not drop sharply at 30 ° and 60 ° at frequencies of 15000 Hz or
more as shown in FIGS. Also, since the reflection plate 31 can be rotated forward and reverse by
the rotation mechanism 40, the sound pressure level can be easily controlled as shown in FIGS.
10 to 12 by changing the angle of the reflection plate 31. An ideal sound field can be obtained.
[0040]
The above embodiment has the following effects.
[0041]
Since the reflection plate 31 is rotatably attached to the tweeter unit 15 by the rotation
mechanism 40, the angle of the reflection plate 31 is changed, so that the sound wave emitted
from the tweeter unit 15 is not distorted and a desirable sound field It is possible to obtain
[0042]
Further, since the curved portion 32 that reflects the sound emitted from the tweeter unit 15 at a
predetermined angle is formed on the reflection plate 31, distortion of the sound wave emitted
from the tweeter unit 15 can be prevented.
And since multiple reflecting plates 31 are formed, distortion of the sound wave emitted from
tweeter unit 15 can be prevented certainly.
[0043]
Furthermore, in order to prevent the reflection plate 31 from rotating by more than a
predetermined angle, the lead 55 connected to the electrode portion 46 is forcibly twisted by
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providing the rotation stopping mechanism including the projecting portion 45 and the stopper
52. Can be eliminated, and disconnection of the lead wire 55 can be prevented in advance.
[0044]
Then, in order to position the reflecting plate 31 with respect to the tweeter unit 15, the pressing
piece 44a is fitted in and positioned between the gear portions 51, so that the reflecting plate 31
can be prevented from rotating unexpectedly. .
[0045]
The present invention is not limited to the above embodiment, and various modifications are
possible.
For example, although the example in which two reflection plates 31 are formed has been
described in the above embodiment, the present invention is not limited to this and at least one
reflection plate 31 may be formed.
[0046]
It is sectional drawing which shows the conventional composite type speaker apparatus.
It is a sectional view of a compound type speaker device in this embodiment.
It is a front view of FIG.
It is an expanded sectional view which shows the tweeter unit of FIG.
(A), (B) is sectional drawing and the top view which show the outer cylinder of a rotation
mechanism.
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(A), (B) is sectional drawing and the top view which show the inner cylinder of a rotation
mechanism.
It is an explanatory view showing a positioning mechanism in this embodiment.
It is explanatory drawing which shows the reflection state of the sound wave of the reflecting
plate in this embodiment.
It is a figure which shows the directional characteristic data of the conventional composite type
speaker apparatus.
It is a figure which shows the directional characteristic data which made the angle of the
reflective plate 0 degree in this embodiment.
It is a figure which shows the directional characteristic data which made the angle of the
reflecting plate 30 degrees in this embodiment.
It is a figure which shows the directional characteristic data which made the angle of the
reflecting plate 60 degrees in this embodiment.
Explanation of sign
[0047]
10: complex type speaker device 11: main speaker unit 12: speaker frame 13: vibration unit 14:
magnetic circuit unit 15: tweeter unit 16: vibration plate 17: edge 20: damper 25: yoke 26:
magnet 27: center piece 31: Reflective plate 32: Curved portion 40: Rotation mechanism 41:
Outer cylinder 42: Inner cylinder 44a: Pressed piece 45: Projection 52: Stopper
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