JPS55150582

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DESCRIPTION JPS55150582
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of an essential part of a
diaphragm of the present invention. In the figure, 1 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · adhesive .
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a diaphragm of a
speaker, and more particularly to the improvement of the transverse bone of the joint between
the diaphragm and the bobbin. Conventionally, the dome, the edge, and the bobbin of the
speaker, especially the vibration mt of the horn speaker, are generally formed integrally with the
dome and the edge, and the bobbin is a grooved structure which is wound with a voice coil and
then bonded thereto. However, metal foils such as titanium foil are temporarily thin, and the
weight of the whole diaphragm is lightened to facilitate the piston movement of the diaphragm
and to make it possible to obtain a wide flat P8 wave number bandwidth. Regardless 1- /, to
increase the bonding strength of the bobbin and the diaphragm! ? 12) By providing a folded
portion on the bobbin or providing a fold, after all, the effect of increasing the bond between the
bobbin and the diaphragm was increased, and an effect of not neglecting 15% was observed. The
present invention is an improvement on the structure of the joint H- of the bobbin and the
diaphragm in order to eliminate the above-mentioned disadvantages. The lower part of the
diaphragm of the present invention is a seedling map, and the lower part of the diaphragm is a
dome-shaped image of a metal foil and a pond. 2 is a bobbin, 3 is a voice coil, and is wound
around the bobbin 2 in advance. The joint between the film g and the bobbin 2 is inside the jig,
the edge 1 and the bobbin 2 are kept vertical, and the external appearance of the bobbin 2 in this
state, that is, the voice coil 3 is wound. Relieve the mesh 4 and fix the bobbin 2 After the bobbin
2 is adhered to m # and & 1, remove the jig. However, in this situation, it is difficult for the
change in watching strength to be low. Therefore, a hot dipable adhesive, for example, a cotton
yarn impregnated with epoxy resin-based adhesive. A yarn or a brushed synthetic resin filament
(2-) yarn 5 is placed along the junction of the bobbin 2 and the diaphragm 1 so as to be inserted
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into the cap of the junction. This is put into a heating furnace, and the adhesive outside 6 of the
yarn 5 attached to the diaphragm 1 and the bobbin 2 is hardened (the size, the both are adhered
to very strong A, and the bobbin 2 is 1-minute to the diaphragm plate 1) It is fixed with a strong
change. Incidentally, in the case of the small output copying board, even if the yarn 5 is directly
disposed at the joint portion outside the bobbin without applying the instantaneous bonding
amount 4, it is possible to obtain a sufficiently strong night. As described above, according to the
present invention, by interposing the yarn 5, the difference between the thermally expandable
yarn and the difference in the thermally expanded yarn caused by the difference in the material
at the junction of the first pregnancy plate 1 and the bobbin 2 is absorbed. A strong bond is
obtained, heat resistance is also excellent, and durability is also obtained from a perfectly elegant
diaphragm.
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