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FIELD OF THE INVENTION The present invention relates to flat speakers. PRIOR ART
Conventional flat loudspeakers are shown in FIG. ??????? The assembly of the voice coil
6 and the damper 7 assembled in another step is adhered to a housing in which the frame 5 is
adhered to the magnetic circuit 4 constituted by the lower plate 3, and the diaphragm is further
formed in another step. Bond the coupling 9 using a jig without eccentricity to 8 and apply an
adhesive to the tip of the voice coil bobbin and the frame outer periphery of the assembly shown
in FIG. Was completed. Problems to be solved by the invention In such a conventional method, a
jig is used to bond the coupling 9 to the center of the diaphragm 9 when the diaphragm 8 and
the coupling 9 are bonded as shown in FIG. It must be used, and if the diaphragm and the
coupling are adhered and taken out immediately from the jig, the adhesive will not be cured, so it
will become eccentric, and if it is used as it is, gap defects will occur. As a result, the adhesion
between the diaphragm 8 and the coupling 9 has a major problem that it can not be taken out
from the jig until the adhesive cures, and the productivity is very bad. The present invention is
intended to provide a flat loudspeaker that can solve this problem. In order to solve this problem,
in order to solve this problem, the present invention provides a step on the back surface of the
diaphragm, that is, the surface to which the coupling is adhered, and uses this step as an outer
diameter guide of the coupling. . Function With this configuration, when bonding the diaphragm
and the coupling, it is possible to bond the coupling to the center of the moving plate without
using a jig, and also after bonding It is also possible to prevent the problem of the eccentricity of
the adhesive due to the step of the diaphragm due to the outer diameter guide of the coupling.
Embodiment 1 FIG. 1 shows an embodiment of the present invention. A step is provided by
thickening the material thickness of the core outside the inner side, and the coupling 9 is
adhered to the diaphragm 10 serving as the outer diameter guide of the coupling 9 with the
outer diameter as a guide. Combine with the assembly of damper,-to complete the speaker. In the
figure, the same reference numerals as in FIG. 2 denote the same parts. As described above,
according to the present embodiment, since the step is provided on the moving plate 1o as the
guide of the coupling 9, a jig for bonding the conventionally used coupling to the center of the
diaphragm is not used. Because there is a guide, there is no offset between the two without
waiting for the curing of the adhesive, so despite the flat speaker, productivity as high as a cone
type speaker In the defect rate as well, the defect rate which has conventionally been about 3
inches can be reduced to about 1 inch due to the reduction of gap defects.
Effects of the Invention According to the present invention, according to the present invention,
the spread type flat panel speaker whose market needs are expected to increase in the future is
very high in industrial value.
Brief description of the drawings
FIG. 1 is a sectional view of a loudspeaker structure according to an embodiment of the present
invention, and FIG. 2 is a sectional view of a conventional flat panel loudspeaker.
1 и и и Upper plate, 2 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и иииииии Voice
coil, 7 иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Vibrating plate.
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