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DESCRIPTION JP2003339096

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DESCRIPTION JP2003339096
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker used in various audio devices and information communication devices.
[0002]
2. Description of the Related Art A conventional speaker will be described with reference to FIG.
[0003]
As shown in FIG. 4, the magnet 1 magnetized as shown in FIG. 4 is sandwiched between the
upper plate 2 and the yoke 3 to form an internal magnetic circuit 4.
The frame 6 is coupled to the yoke 3 of the magnetic circuit 4, and the diaphragm 7 is bonded to
the peripheral portion of the frame 6. Then, the voice coil 8 coupled to the diaphragm 7 is
centrally held by the damper 9 so as to be fitted into the magnetic gap 5 of the magnetic circuit
4.
[0004]
The above-described speaker is intended to be thin, and if the amplitude stroke of each
component is designed to be small in order to achieve thinness, the voice coil 8 is largely
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amplified. The damper 9 is in contact with the yoke 3 of the magnetic circuit 4 to generate an
abnormal sound.
[0005]
The present invention solves the above-mentioned subject, and provides an excellent speaker
which can realize thinning.
[0006]
SUMMARY OF THE INVENTION In order to solve the above problems, the invention according to
claim 1 of the present invention is characterized in that the yoke is provided with at least one
longitudinal slit and the damper passes through the slit of the yoke It is coupled to support the
voice coil.
With this configuration, even if the voice coil vibrates to a large extent, the damper does not
contact the yoke, and the generation of abnormal noise can be prevented.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be
described below with reference to the drawings.
[0008]
(First Embodiment) The invention according to the first aspect of the present invention will be
described with reference to the first embodiment.
[0009]
FIG. 1 is a cross-sectional view of a speaker according to an embodiment of the present invention,
FIG. 2 is a perspective view of a yoke, and FIG. 3 is a perspective view of a damper.
[0010]
As shown in FIGS. 1, 2 and 3, the magnetized magnet 21 is sandwiched between the upper plate
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2
22 and a yoke 23 having four slits 23a in the longitudinal direction to form an internal magnetic
circuit 24. There is.
A frame 26 is coupled to the yoke 23 of the magnetic circuit 24, and a diaphragm 27 is bonded
to the periphery of the frame 26.
The voice coil 28 coupled to the diaphragm 27 is coupled so as to fit in the magnetic gap 25 of
the magnetic circuit 24.
At this time, the outer periphery 29a of the damper 29 is connected to the frame 26, the leg 29b
is passed through the four slits 23a of the yoke 23, and the inner periphery 29c is connected to
and supported by the voice coil 28.
[0011]
With this configuration, even if the voice coil 28 vibrates up and down largely by applying a
large input, the damper 29 does not contact the yoke 23, and generation of abnormal noise can
be prevented.
[0012]
Also, the number of slits 23a of the yoke 23 may be set not only at four places, but also more or
less.
Furthermore, it is also possible to freely set the number of leg portions 29b of the dampers 29
which are passed through the slits 23a of the yoke 23 to be equal to or less than the number of
the slits 23a.
[0013]
As described above, the speaker of the present invention can be made thinner by providing a slit
in the yoke and supporting the voice coil after passing a part of the damper through the slit. .
[0014]
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Thus, the present invention can provide an excellent speaker capable of achieving thinning, and
its industrial value is extremely large.
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