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JP2002176692

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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 JP2002176692
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker used for various audiovisual devices, and more particularly to a speaker with a narrow
width.
[0002]
2. Description of the Related Art The prior art will be described with reference to FIGS. FIG. 9 is a
cross-sectional view in the short diameter direction of a so-called slim speaker of the
conventional narrow width type, FIG. 10 is a perspective view of a voice coil as the main part,
and FIG. FIG.
[0003]
According to the figure, 1a and 1b are rectangular magnets magnetized in opposite directions,
and the upper plate 2 provided with the magnetic gap 2a at the upper part is adhesively coupled,
and the lower plate 3 provided with the magnetic gap 3a at the lower part Are adhesively bonded
to form a magnetic circuit 5.
[0004]
6 is a frame adhesively bonded to the upper plate 2; 7 is a diaphragm of which the outer
peripheral edge is adhesively bonded to the frame 6; 8 is formed in the center of the minor axis
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of the diaphragm 7 in the major axis direction The planar voice coil is supported by the damper
10, which is inserted into the slit 7a and adhered and fixed in the upper portion 8a and is
adhesively bonded to the lower plate 3 via the damper support portion 10a.
[0005]
The upper and lower coil portions 8c of the voice coil 8 are respectively inserted into the slitshaped magnetic gap 2a of the upper plate 2 and the slit-shaped magnetic gap 3a of the lower
plate 3 by the support of the voice coil 8 of the damper 10. It is arranged to be located.
[0006]
However, in the above-mentioned conventional speaker, the upper portion 8a of the planar voice
coil 8 is inserted into one slit 7a provided in the major axis direction of the diaphragm 7 and
adhered thereto. Therefore, it is difficult to hold and bond the voice coil 8 vertically, and
inclination is apt to occur, and an appropriate gap can not be secured in the magnetic gaps 2a
and 3a, so that magnetic gap defects tend to occur. While making the productivity of the
connection between the diaphragm 8 and the diaphragm 7 extremely poor and increasing the
distance between the magnetic gaps 2a and 3a to prevent this, the magnetic flux density is
lowered and the efficiency is lowered. It had the subject of becoming a thing.
[0007]
An object of the present invention is to provide an excellent speaker which is easy to assemble by
solving the above-mentioned problems.
[0008]
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the invention
according to claim 1 of the present invention is a speaker using a flat voice coil, which is
provided with a plurality of slits in a diaphragm. A convex part inserted and coupled to each slit
is provided on the upper part of the voice coil, and the voice coil is inserted into one slit, and the
number of bonding points is increased to a plurality of places as compared with those bonded
and fixed. In the case of being inclined and fixed, the influence on other joints is eliminated to
suppress the inclination of the voice coil as a whole.
[0009]
The invention according to claim 2 of the present invention is a speaker using a flat voice coil,
wherein a concave groove is provided in the diaphragm, and the voice coil is fitted and coupled
to the groove, and the voice coil Instead of bonding and fixing the line contact portion between
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the voice coil and the diaphragm as in the prior art, the surface contact portion is adhesively
bonded from both sides of the voice coil by sandwiching it between the groove portions. It is.
[0010]
The invention according to claim 3 of the present invention is a speaker using a planar voice coil,
wherein the diaphragm and the voice coil are integrally formed in a cross section substantially Yshape, the upper portion is a diaphragm, and the lower portion is a planar By forming the voice
coil and the diaphragm integrally, it is possible to make the relationship between the diaphragm
and the voice coil non-inclined.
[0011]
As described above, in any of the above, it is possible to easily make the relationship between the
diaphragm and the voice coil non-inclination, and to provide a highly efficient speaker with less
occurrence of magnetic gap defects. It is a thing.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a loudspeaker according
to the present invention will be described below with reference to FIGS. 1 to 8. FIG.
In the description, the same parts as in the prior art will be assigned the same reference
numerals and explanations thereof will be omitted.
[0013]
(First Embodiment) FIG. 1 is a cross-sectional view in the short diameter direction of a slim
speaker according to an embodiment of the present invention, and FIG. 2 is a perspective view of
a track-shaped diaphragm which is the main part. FIG. 3 is a perspective view of the planar voice
coil which is the main part.
[0014]
According to the figure, the difference from the prior art lies in the diaphragm and the planar
voice coil, and the diaphragm 20 is provided with a plurality of slit portions 20a along the major
axis direction at the central portion in the minor axis direction which is the lowermost end. The
flat voice coil 21 is provided with convex portions 21a which are respectively inserted into the
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slit portions 20a.
[0015]
According to the above configuration, the positional relationship between the two is not
determined by the adhesive bonding of at least one diaphragm 7 and the voice coil 8 as in the
prior art. Even if the voice coil 21 is coupled so as to be slightly inclined instead of being coupled
vertically as in the voice coil 21, by performing regular coupling with the convex portion 21a in
the other slit portion 20a, the inclination as a whole is made As a result, it is possible to suppress
magnetic gap defects generated between the magnetic gaps 2a and 3a, and to secure a narrow
gap to achieve high efficiency of the speaker.
[0016]
Reference numeral 21 b denotes a lower portion of the voice coil 21 supported by the damper
10.
Reference numeral 21c denotes a coil portion, which is formed by winding the conductive wire in
a coil shape, embedded in the voice coil 21, formed on a flat plate, or formed by printing a
conductor, etc. It is.
[0017]
Second Embodiment Another embodiment of the speaker according to the present invention will
be described with reference to FIGS.
FIG. 4 is a cross-sectional view in the minor axis direction of the slim speaker, FIG. 5 is a
perspective view of a track-type diaphragm which is the same main part, and FIG. 6 is a
perspective view of the voice coil.
[0018]
According to the figure, reference numeral 22 denotes a diaphragm in which a downward
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concave groove 22a extending in the major axis direction is formed at the central portion in the
minor axis direction which is the lowermost end, and 23 is formed similarly to the first
embodiment. The voice coil has a coil portion 23c and a lower portion 23b supported by the
damper 10, and the upper portion 23a is fitted in the groove 22a to adhesively bond the
diaphragm 22 and the voice coil 23 with the groove 22a.
As described above, the diaphragm 22 and the voice coil 23 are not in a line contact state as in
the prior art because they are adhesively bonded in the groove 22a, and surface contact and
further the voice coil 23 is sandwiched by the diaphragm 22 by the diaphragm 22 Since bonding
is performed, bonding work is not performed in the inclined bonding state, and it is extremely
easy to hold the voice coil 23 vertically and connect it to the diaphragm 22 as shown in FIG. It is
possible to improve the efficiency of assembly work more than the ones.
[0019]
Third Embodiment Another embodiment of the loudspeaker according to the present invention
will be described with reference to FIGS. 7 and 8. FIG.
FIG. 7 is a cross-sectional view of the slim speaker in the minor axis direction, and FIG. 8 (a) is a
cross-sectional view of the integral part of the diaphragm and voice coil which are the main parts
before processing. It is sectional drawing after the process of the diaphragm and voice coil after
the said process.
[0020]
According to the figure, 24 is a diaphragm voice coil integral product formed in a Y-shape by
peeling the upper part of one formed plate after forming the coil part 24a, the upper part is the
diaphragm part 24b, and the coil The lower portion provided with the portion 24a is the voice
coil portion 24c.
[0021]
In addition, since the above-mentioned peeling work can be performed with great accuracy by
jigs and tools, it is possible to omit the bonding work of the diaphragm and the voice coil and to
prevent the occurrence of the magnetic gap defect mentioned above. It is possible to provide
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[0022]
Although the third embodiment has been described as peeling and integrally forming the
diaphragm and the voice coil, it is possible to directly form a Y-shaped one-piece product by resin
molding.
In this case, the coil portion 24a may be formed by embedding a conductor at the time of
molding, and can be formed by a known method such as attaching a printed coil after molding.
[0023]
As described above, according to the present invention, the gap between the voice coil and the
diaphragm is not inclined, thereby suppressing the gap defect and narrowing the magnetic gap,
and the speaker of excellent high efficiency and narrow width. It is possible to provide
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