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JP2003259484

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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
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2003259484
[0001]
TECHNICAL FIELD The present invention relates to a speaker used in various mobile
communication devices.
[0002]
2. Description of the Related Art Improvements in sound quality and quality are also desired for
mobile communication speakers used in recent mobile communication devices.
[0003]
Here, a conventional speaker for mobile communication will be described with reference to FIGS.
3 and 4.
[0004]
FIG. 3 is an exploded perspective view of a conventional speaker for mobile communication, and
FIG. 4 is a half sectional view of a voice coil and a diaphragm which are main parts.
[0005]
According to the figure, reference numeral 1 denotes a circular diaphragm which generates air
vibration, and the outer peripheral portion of the diaphragm 1 is formed of a resin molded frame
2 provided with a plurality of first sound holes 2a on the outer periphery with an adhesive.
Bonding is maintained.
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1
[0006]
One end of the voice coil 3 is fixed to the center of the diaphragm 1, and the voice coil leads 3a
at both ends of the voice coil 3 are electrically connected to a terminal 4 provided below the
periphery of the frame 2. .
[0007]
The terminal unit 4 is also connected to an audio output terminal (not shown) of the audio
device.
[0008]
A magnetic circuit composed of a magnet 5, a top plate 6, and a yoke 7 is provided in the center
hole on the bottom of the frame 2, and in the magnetic gap between the outer periphery of the
top plate 6 of this magnetic circuit and the inner periphery of the yoke 7. The other end side of
the voice coil 3 fixed to the diaphragm 1 is fitted.
[0009]
An audio signal output from the audio output terminal of the audio device is input to the voice
coil 3 through the terminal unit 4, the voice coil 3 is driven to vibrate the diaphragm 1, and a
sound wave is emitted. .
[0010]
Reference numeral 8 denotes a protector, which plays a role of protecting the diaphragm 1.
[0011]
Further, in this protector 8, a second sound hole 8a which is line symmetrical or point
symmetrical with respect to a central portion viewed from a plane direction radiates the sound
wave radiated from the diaphragm 1 outward.
[0012]
SUMMARY OF THE INVENTION The conventional speaker as described above has a construction
in which the diaphragm 1 and the voice coil 3 are joined using an adhesive. Therefore, the
dimensional error and the assembly error of the diaphragm 1 and the voice coil 3 respectively As
a result, problems such as contact in the gap of the magnetic circuit occur, causing deterioration
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in sound quality and quality.
[0013]
Further, since the conventional voice coil lead 3a is routed without fixing between the voice coil
3 and the terminal portion 4, the voice coil lead 3a causes abnormal resonance, which is one of
the causes of disconnection failure.
[0014]
The present invention is to solve the above-mentioned problems, and it is an object of the present
invention to provide a speaker excellent in sound quality and quality.
[0015]
SUMMARY OF THE INVENTION In order to solve the above problems, the speaker according to
claim 1 of the present invention integrates a voice coil and a voice coil lead with a diaphragm by
insert molding, and at both ends of the voice coil. The voice coil lead is disposed at a symmetrical
position on a straight line passing substantially the center of the diaphragm as viewed from
above, and the terminal thereof is electrically connected to a terminal portion provided on the
frame. The integration of the voice coil by insert molding improves bonding accuracy, and
suppresses quality problems (gap defects) caused by the contact between the voice coil and other
parts in the magnetic gap of the magnetic circuit, and the voice coil Integrate the leads to
improve the strength of the leads and prevent abnormal resonance. Suppress line, further, but
also to suppress abnormal noise generated by the rolling phenomenon of the diaphragm by
which place this leads to a symmetrical position on the straight line passing through substantially
the center of the diaphragm.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a speaker according to the
present invention will be described below with reference to FIGS. 1 and 2. FIG.
In the description, the same parts as those in the prior art are denoted by the same reference
numerals and the description thereof is omitted.
[0017]
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3
(First Embodiment) FIG. 1 is an exploded perspective view of a speaker according to an
embodiment of the present invention, and FIG. 2 is a cross-sectional view of a diaphragm which
is the same as the main part.
[0018]
The difference between the prior art and the prior art will be described with reference to FIG. 11.
Reference numeral 11 denotes a diaphragm in which an air core voice coil 12 and voice coil
leads 13 at both ends of the voice coil 12 are insert-molded by injection. When viewed from
above, it is divided symmetrically on a straight line passing through the approximate center of
the diaphragm 11 and drawn out integrally with the diaphragm 11 to the vicinity of the outer
periphery of the diaphragm 11.
[0019]
A frame 14 has a magnetic circuit consisting of a magnet 5, a top plate 6, and a yoke 7 disposed
in a hole in the center bottom surface, and between the inner periphery of the yoke 7 and the
outer periphery of the top plate 6 constituting the magnetic circuit. A magnetic gap is provided in
which the voice coil 12 integrated with the diaphragm 11 is fitted.
[0020]
14a is a first sound hole provided at a plurality of locations on the bottom of the frame 14, 14b is
a pair of terminal portions provided on the outer circumferential bottom of the frame 14, and
14c is a diaphragm 11 provided on the outer periphery of the frame 14. The voice coil lead 13
drawn out from the outer circumference of the above is a groove for leading up to the terminal
portion 14b.
[0021]
As described above, in the present embodiment, the voice coil 12 is integrated by insert molding
at the time of molding the diaphragm 11, thereby improving the bonding strength of the voice
coil 12 and the diaphragm 11 and suppressing variation. Accuracy can be improved as compared
with such bonding, and deterioration in sound quality and quality due to gap defects can be
suppressed, and voice coil lead 13 is also integrated with diaphragm 11 to improve strength of
voice coil lead 13 and suppress abnormal resonance. To prevent disconnection due to this, and
further, as is apparent from FIG. 1, the voice coil lead 13 is disposed at a symmetrical position on
the straight line passing through the center of the diaphragm 11 as viewed from above and
integrated with the diaphragm 11 , The diaphragm 11 does not roll when driven, and this rolling
Abnormal sound caused by elephants is also intended to suppress.
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[0022]
As described above, the loudspeaker according to the present invention is configured, which
makes it possible to provide a reliable, high-quality loudspeaker.
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