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JP2001346292

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Notice
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 JP2001346292
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker device, and more particularly to a speaker device which can be mounted even when the
area of the mounting location is narrow and, in particular, the reproduced sound in the middle
and high range is improved.
[0002]
2. Description of the Related Art Heretofore, as a speaker device mounted at a place where the
mounting area is narrow or where the mounting place is limited, a car audio speaker device can
be mentioned. For this reason, as is well known, the car audio speaker device is generally formed
to have an elliptical outer shape.
[0003]
However, an elliptical diaphragm is often used in this elliptical speaker device, and the major and
minor axes of the elliptical speaker are largely different, which makes it difficult to obtain the
diaphragm strength. In addition, the state of divided vibration is also bad, and it is difficult to
reproduce the middle range and the high range. A relatively large tweeter is required as a means
to compensate for this deterioration in sound quality.
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[0004]
The present invention is intended to solve such problems, and is relatively compact and compact,
and even if it is configured as an elliptical speaker device, it is possible to reproduce sound with
excellent sound quality in the entire sound range. It is an object to obtain a speaker device.
[0005]
Therefore, in the invention according to claim 1, the speaker device comprises a magnetic circuit
portion fixed to the base of the frame and a voice coil inserted in the air gap of the magnetic
circuit portion. The inner peripheral edge is attached to the outer peripheral edge of the cone
type diaphragm via a damper, and the outer peripheral edge is a frame via the edge. The abovementioned problem is solved by comprising the flat type diaphragm attached to the opening of
the above.
[0006]
Then, in the invention according to claim 2, the speaker device is separated by a gap between the
speaker unit fixed to the other end of the support member whose one end is fixed to the
magnetic circuit portion and the outer peripheral surface of the support member. An inner
peripheral edge is attached to an outer peripheral edge of the cone-shaped diaphragm via a
damper, and an outer peripheral edge is an edge material. To solve the above-mentioned
problem.
[0007]
The invention according to claim 3 is characterized in that the flat diaphragm in the speaker
device according to the invention according to claim 1 or 2 is constituted by a diaphragm having
a honeycomb structure.
[0008]
And, in the invention according to a fourth aspect, the flat type diaphragm in the speaker device
according to the first aspect or the second aspect is characterized in that it is constituted by a
diaphragm having a foam structure.
[0009]
Furthermore, the invention according to claim 5 is characterized in that the flat diaphragm in the
loudspeaker apparatus of the invention according to claim 1 or 2 emits a sound in a frequency
band lower than that of the cone diaphragm. I assume.
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[0010]
Furthermore, the invention according to claim 6 is characterized in that the flat diaphragm in the
speaker apparatus according to the invention according to claim 1 or 2 is elliptical.
[0011]
Therefore, according to the speaker device of the invention described in claim 1, it is possible to
reproduce sounds in the middle to high range with a cone type diaphragm and sounds in a low
range with a flat type diaphragm, and a sound with good sound quality over the whole range. It
can be played back.
[0012]
In the speaker device according to the second aspect of the present invention, sound in the
middle to high range can be reproduced by the cone type diaphragm and sound in the low range
can be reproduced by the flat type diaphragm, and further, in the central portion of the cone type
diaphragm. The high-pitched sound area can be further improved by the arranged speaker unit,
and the sound of excellent sound quality can be reproduced over the whole sound area.
[0013]
In the speaker device according to the third aspect of the invention, in addition to the effects of
the invention according to the first or second aspect, the flat type diaphragm is constituted by
the diaphragm of the honeycomb structure. You can emphasize the sound and increase the
overall intensity.
[0014]
Further, in the speaker device of the invention according to the fourth aspect, in addition to the
effects of the invention according to the first aspect or the second aspect, the sound of the bass
range can be emphasized, and the overall weight can be relatively reduced. Can.
[0015]
Furthermore, in the speaker device according to the fifth aspect of the present invention, in
addition to the effects of the first aspect or the second aspect of the present invention, the sound
in the bass range can be further improved.
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Furthermore, in the speaker device of the invention according to the sixth aspect, in addition to
the effects of the invention according to the first or second aspect, the whole can be formed in an
elliptical shape, and the mounting location is small. Can also be attached.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION A speaker device of the present invention will
be described below with reference to the drawings.
[0017]
1 is a front view of a speaker device according to an embodiment of the present invention, FIG. 2
is a rear view of the speaker device shown in FIG. 1, and FIG. 3 is a side view of the speaker
device shown in FIG. 4 is a side view of the speaker device shown in FIG. 1 as viewed from the
arrow B, FIG. 5 is a cross-sectional side view of the speaker device shown in FIG. 1 along line A-A,
and FIG. It is a graph of the frequency characteristic and impedance characteristic of a speaker
apparatus shown.
[0018]
In FIGS. 1 to 5, reference numeral 1 generally refers to a speaker device according to an
embodiment of the present invention.
The speaker device 1 is assembled centering on a frame portion 10, and includes a magnetic
circuit portion 20, a diaphragm portion 40, and a tweeter portion 50.
[0019]
The frame portion 10 comprises a large-bore oval opening 11 and a small-bore circular base 12
and a plurality of, in this embodiment, eight, pillars 13 equally supporting these, in a cone shape
It is a metal member of open structure.
[0020]
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A magnetic circuit unit 20 is disposed on the back of the base 12 of the frame unit 10.
The magnetic circuit portion 20 has a circular plate 21 of a magnetic material in which a circular
hole is formed at the central portion, and a disk-shaped magnetic material in which a magnetic
cylindrical center pole 22 having a diameter entering the circular hole of the plate 21 is formed.
And a yoke 23.
A magnet 24 is disposed around the center pole 22 between the plate 21 and the yoke 23.
[0021]
A cylindrical bobbin 31 having a diameter slightly larger than the diameter and a coil 32 wound
around the cylindrical pole 31 are disposed on the center pole 22, and the bobbin 31 moves up
and down in a gap (air gap) between the plate 21 and the center pole 22. Is inserted so that you
can freely.
The upper end of the bobbin 31 is supported by the damper 33 at the upper edge of the base 12
of the frame 10.
The damper 33 is composed of two circular damper members 33A and 33B disposed in parallel
with each other at a predetermined interval.
[0022]
The diaphragm portion 40 is composed of a cone diaphragm 410 and a flat diaphragm 420.
The cone type diaphragm 410 is a cone shape literally, but the flat type diaphragm 420 is a flat
type diaphragm in which a circular opening is opened at the center and an outer peripheral
shape is formed in an elliptical shape.
These materials may be light and rigid materials such as paper, aluminum, and resin, but in the
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present embodiment, the flat diaphragm 420 has a honeycomb structure or a foam structure.
[0023]
The circular inner peripheral edge 411 of the base of the cone-shaped diaphragm 410 is fixed to
the upper peripheral edge of the bobbin 31, and the circular opening edge 412 is the inner
peripheral edge of the flat-plate diaphragm 420 via the annular damper 34. It is attached to 421.
[0024]
The flat diaphragm 420 has its outer peripheral portion 422 fixed and attached to the elliptical
opening 11 of the frame portion 10 through the elastic edge member 35.
[0025]
The tweeter unit 50 is composed of a tweeter 51 and a support 52, and the tweeter 51 may be a
small speaker that is responsible for high frequency range reproduction.
The support 52 has a cylindrical shape whose diameter is slightly smaller than the inner
diameter of the bobbin 31, the upper end 521 is open, and the lower end is a bottom 522.
The center axis is aligned on the center pole 22, and the bottom 522 of the center pole 22 is
screwed and fixed by a male screw 60 inserted from the rear center of the yoke 23.
[0026]
An audio signal from an audio device is supplied to the coil 32 by a lead wire wired to the coil 32
through a through hole (not shown) formed in parallel with a female screw hole into which the
male screw 60 is screwed. The relay unit 70 and the terminal unit 53 of the tweeter 51 are
relayed and supplied to the coil (not shown) of the voice coil of the tweeter 51.
[0027]
When the audio signal of the frequency of the whole band is applied to the terminal unit 70, the
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speaker device 1 configured in this way, as shown in FIG. Sound is played.
Then, in the flat diaphragm 420, the sound of the middle to high range component is absorbed
by the damper 34 existing between the cone diaphragm 410 and the flat diaphragm 420, and it
is not transmitted, but mainly the sound of the component of large amplitude. The sound is
transmitted mainly, and the low-pitched sound is reproduced.
The tweeter 51 further improves the sound of the high range component.
Therefore, as a whole, the speaker device 1 according to the present embodiment can reproduce
an applied audio signal with good frequency characteristics over the entire band from the
component of the low tone range to the component of the high tone range.
[0028]
In the above embodiment, the flat diaphragm 420 of the speaker device 1 is formed in an
elliptical shape, but if there is no restriction on the mounting area of the loudspeaker device, the
flat diaphragm 420 is circular. I refuse to do something good.
[0029]
Further, if sufficient frequency characteristics of high-tone reproduction can be obtained with
only the cone-shaped diaphragm 410, or if the high-tone reproduction frequency characteristics
reproduced by the cone-shaped diaphragm 410 are sufficient depending on the application, the
tweeter unit 50 is unnecessary. It is.
[0030]
Furthermore, it should be noted that the speaker device 1 of the present invention is not limited
to a vehicle, and can be used for various other applications.
[0031]
As described above, according to the speaker device of the present invention, middle-to-high
range component characteristics can be improved by a cone diaphragm having a small opening
diameter, and low-range component characteristics are flat plate-type. This can be done well with
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a diaphragm.
By using a tweeter, the high frequency range component can be further improved, and the
tweeter can be put to practical use with a small size.
Therefore, it is possible to reproduce sufficient low-pitched sound without disturbing the balance
of reproduction characteristics of middle and high tone as a whole, and sound can be reproduced
well over the entire frequency band.
[0032]
For this reason, if the entire flat panel diaphragm is formed into an elliptical shape by using an
elliptical one, it can be attached even in a place having a small mounting area, for example, as a
dedicated rear speaker device for a vehicle It is suitable to use.
[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 a rear view of the speaker device shown in FIG. 1;
[0036]
3 is a side view of the speaker device shown in FIG. 1 as viewed from the arrow A. FIG.
[0037]
4 is a side view of the speaker device shown in FIG. 1 as viewed from the arrow B. FIG.
[0038]
FIG. 5 is a cross-sectional side view of the speaker device shown in FIG. 1 along the line A-A.
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[0039]
6 is a graph of frequency characteristics and impedance characteristics of the speaker device
shown in FIGS. 1 to 5. FIG.
[0040]
Explanation of sign
[0041]
DESCRIPTION OF SYMBOLS 1 Speaker device of one embodiment of the present invention 10
Frame portion 11 Elliptical opening portion of frame 12 Base portion of frame 20 Magnetic
circuit portion 21 Plate 22 Center pole 23 Yoke , 24: magnet, 30: voice coil, 31: bobbin, 32: coil,
33, 34: damper, 33A, 33B: damper member, 34: damper, 35: edge material, 40: diaphragm
portion, 410: cone type Diaphragm, 420: flat plate type diaphragm, 50: tweeter portion, 51:
tweeter, 52: support base, 60: male screw
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