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JPS57202297

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DESCRIPTION JPS57202297
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a prior art, and FIGS. 2 and 1 are cross
sectional views showing an embodiment of the present invention. 1 и 6. 10 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 и и и и и и и и и и и и и и и и и и и и и resonant space , 7 ░ 11 и и и и и и
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
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 Fluid , 15 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 drive
part, 18 и и и и и и fulcrum
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waterproof wide
band watch speaker. Conventionally, a speaker used for a wristwatch is as shown in FIG. In the
structure shown by l'7, by the fill 4 wound around the core 3> DC magnetic field is applied by the
alternating magnetic field t () and the magnet 2, and the diaphragm 1 is attracted to generate
sound and resonance There is a drawback that the sound resonates in the space 5 to cause a
large heat (but it is distorted when trying to output a large volume) and the efficiency is lowered.
(T) The amplitude of the diaphragm 1 is large (if it is in contact with the magnetic core 3 and, in
order to avoid this, the distance between the diaphragm 1 and the magnetic core 3 is large.
Furthermore, depending on the distance between the diaphragm 1 and the magnetic core 3, the
diaphragm IK works (because the group power is different, the relationship between the
waveform input to the coil 4 and the movement of the lifting plate 1 becomes non-linear and
distortion occurs. If the 4IK amplitude is very hot, this distortion #i becomes noticeable. In order
to eliminate the above-mentioned defects, the present invention suppresses the amplitude of the
drive part small, aims to improve the efficiency of the speaker and reduce the distortion, and to
maintain the waterproofness as shown in FIGS. 2 and 3 below. It will be described in detail based
on. Figures 2 and 31 are embodiments of the present invention. In the first 2 ^ somewhat 3202
diagram company drive 11616 the amplitude is small (a power incoming vibration of force is
generated in the iron piece 9 and the vibrating plate 6 is vibrated via the connecting rod 8). The
connecting rod 8 is supported by the fulcrum 18 to expand the small vibration of the iron piece 9
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and vibrate the diaphragm 6 with a large amplitude. Diaphragm 6 outside part! It is shaped like a
wave so as to be flexible. When the watch is placed in water, a strong water pressure is applied to
the diaphragm 6 and a force such as pushing the diaphragm t- works. The outer peripheral
portion of the vibration [6] The stopper 7 collides with the relatively strong portion of the
diaphragm 6 before it reaches the sagging or breakage, and the deformation of the diaphragm 6
is limited. In this way, it has been named to simultaneously withstand a certain degree of water
pressure and to lower the resonant frequency of the mobile plate. In FIG. 3, the vibration t is
generated by the drive 817 in the vibration t piston 13 with a small amplitude, and the
diaphragm lO pipe is vibrated via the fluid 14 and the piston 12 which are wrapped by the
rubber film 15. In this case, the small vibration of the piston 13 is expanded by the area ratio of
the piston 12 and the piston 3 to move the diaphragm 10. The other operations are the same as
in the embodiment of FIG. When placed under water and a pressure is applied to the diaphragm
111, the stopper 11 limits the deformation of the diaphragm 11 to the shape of 3-) h321. As
described above, according to the present invention, the amplitude is reduced 1 and distortion is
reduced and efficiency is improved.
Furthermore, while being a waterproof speaker, it has an effect such as a low reproduction same
wave number 1 low.
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