JPS5690100

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DESCRIPTION JPS5690100
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a half sectional view showing one embodiment
of a piezoelectric speaker according to the present invention, FIG. 2 is a 10 'view of a diaphragm
of the same speaker, and FIG. It is. Reference Signs List 1 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
support ribs, 3 · · · · · · · · · · · · · · · · · · · · · · · adhesive 6,...
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piezoelectric
type speaker having a piezoelectric flexure having a flat plate flexural vibration, which is
improved by combining a diaphragm and a piezoelectric vibrator with a bonding portion, thereby
shortening the drying time of the adhesive. It is intended to provide something that can confirm
the status. As a conventional piezoelectric speaker, a piezoelectric vibrator that is subjected to
flat plate flexural vibration is coupled to a central portion of a cone-shaped diaphragm fixed to a
river edge of a frame by using an adhesive. In particular, an adhesive is applied and bonded to
the top of the cone-shaped moving plate and the center of the piezoelectric vibrator, but the
solvent of the adhesive is likely to diffuse and it takes time to dry and cure, While being
disadvantageous in terms of productivity, it can not be confirmed in the assembling process
whether or not the diaphragm and the piezoelectric vibrator are securely coupled, and the quality
is also extremely disadvantageous. An embodiment of the present invention will be described
below with reference to FIGS. 1 to 3 to eliminate the disadvantages of the present invention.
Reference numeral 1 denotes a frame formed of a synthetic resin, and a support protrusion 2
having a sharp tip is provided on the inner bottom of the frame 1, and a lower vibrator 3 which is
subjected to flat plate deflection loss is disposed on the support protrusion 2. It is done. The
center of the piezoelectric vibrator 3 (or the top of the cone-shaped diaphragm 4) is bonded by
an adhesive 6. In addition, a plurality of small holes 6 are formed on the top of the diaphragm 4
and the solvent of the adhesive 5 is volatilized and dissipated from the small holes 6 to accelerate
curing of the adhesive 5D. Further, the small holes 6 are configured so that the coupling state of
the lower vibrator 3 and the diaphragm 4 by the adhesive 5 is confirmed by inspection. The
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peripheral portion of the diaphragm 4 is bonded to the peripheral portion of the frame 1 by an
adhesive. Still further, a read wire 7 is drawn from the piezoelectric vibrator 3 and fixed to the
outer bottom surface of the frame 1 so as to be electrically connected to the terminal 8. An input
signal is applied to the piezoelectric vibrator 3 through the lead rod 7. As described above, since
the heavy type speaker according to the present invention is configured, the bonding operation
of the piezoelectric vibrator and the diaphragm can be performed in a short time with a simple
configuration, and the productivity can be improved. The small holes near the top allow you to
confirm the bonding state during bonding even during the assembly process, which makes it easy
to identify defects, make it easy to determine defects, and has many advantages such as
improvement in quality. Of great value.
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