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JPS5772495

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DESCRIPTION JPS5772495
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of an embodiment
according to a conventional structure, and FIG. 2 shows its drive circuit. FIG. 3 is a sectional view
of an embodiment according to the structure of the present invention, and FIG. 4 shows its drive
circuit. 1 ииииии Watch movement, 2 иииииии Watch outer back cover, 3.3 ? иииииииии Lead spring member,
4,4 ? ииииии Spring member set screw, 5 и и и и и и и и и metal deposition electrode, 6 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 conductive adhesive, 8 и и и и и и и и и и и Insulator, 10 иии Adhesive
material, L 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 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 Booster coil, Tr и и и и и drive transistor, I + I + I 3 и
и и и и и inverter.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fixing method of
a piezoelectric type sounding body when used as an alarm sound source of a gravity type
sounding body 115i1 clock. 1 and 1, when a piezoelectric element is used as an alarm sound
source in a clock according to a conventional method, the structure of one embodiment is given.
The piezoelectric element 6 forms the metal vapor deposition electrode 5 on the earth surface as
one of the electrodes, and this city r! i is connected to the movement 1 by a lead spring + 83iC. и и
и и и и и и и и As the electrode of the piezoelectric element on the bottom face of the watch back cover
2 by processing the J upper side agent 7 and directly contacting- doing. i to 21 is a conventional
method (lc. Mandatory round "и и An example of the province. When the drive s No. of the square
rod passes from a to the drive transistor Tr manually, the operation of the circle f flowing
through the booster coil L is repeated. In FIG. 2, a spike-like high voltage is generated in FIG. 2
due to the back electromotive force induced in the booster coil L while the dE flow is cut off
fcv14. The spike-like voltage generated at b is generated by the piezoelectric element 6 by
applying ? 2-). VDD in FIG. 1 is connected to the exterior back cover 2 in FIG. 2, and b in FIG. 1
is connected to the lead spring member SVC in FIG. According to this conventional method, one
of the electrodes of the piezoelectric element 6 is directly attached to the exterior back cover, so
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that one of the electrodes is necessarily directly connected to VDD directly connected to the
exterior. Because the supply voltage VD'DFi is low and the @ contact pressure element 6 can not
be driven, a boost coil L is required, which occupies a considerable place in the watch movement.
Furthermore, the back electromotive force generated by the booster coil LI7C has various
frequency components different from the driving frequency, and a stable frequency can be
obtained. In the present invention, an insulator is intervened in the electrode on the side to be
adhered to the exterior layer pig of the piezoelectric element, and the electrode is adhered to the
back pig, and both the exterior electrode and the piezoelectric element are electrically insulated
together. , Aims to eliminate the above drawbacks. Hereinafter, an embodiment of the structure
according to the present invention will be described in detail with reference to FIG. The
piezoelectric element 6 has metal deposition electrodes 5 and 8 formed on both sides in the form
3-3, and approximately 1! Of the lower surface of the piezoelectric element 6. Pole 8it. The
piezoelectric element 6 is formed so as to cover the piezoelectric element 6 until tm through
9IIl'fl and o0 both il! The poles are connected together by means of lead spring members 5 and 5
'gold. The electrode 8 on the lower surface is bonded to the exterior member lid 2 by bonding
4410 with the heat sink 9 interposed.
In FIG. 4, the drive waveform of the square wave input from -a which brings down an example of
the drive circuit of the pressure element in the present method is inverted by the inverter 1 and
A reverse voltage is generated with respect to the voltage input to a, and the other electrode d is
exposed to the inverter 2.degree. I3 and inverted twice to generate the same voltage as the
manual pressure. Therefore, a pressure twice as high as the voltage applied to allll is generated
between the two cities c and d, and if a high voltage such as lithium ? ? i is used for the power
supply VDD, the pressure Iv element 6 is sufficient. A drivable pressure is obtained, and the
booster coil L in FIG. 2 is not required. This second method of boosting with the gas-tight circuit
is possible when both pressure electrodes 60 are both isolated from the power supply VDD -4 =).
As described above, according to the present invention Vc1, the step-up coil for a relatively large
space is not necessary, so the layout of the substrate can be facilitated, and the entire movement
can be thinned. Furthermore, since there is no l-t in the driving waveform of the back
electromotive force and pressure by the booster coil and the square ho help, there is also an
effect that the frequency component is stabilized. 4, a brief description of the figure (2) FIG. 1 is a
cross-sectional view of the embodiment according to the conventional +7) structure vc, FIG. 2Q
or its driving circuit. FIG. 6 is a cross-sectional view of an embodiment according to the structure
vc of the present invention, and FIG. 4 shows its drive circuit (i-b). 1 и и и] ? ? ? ? ? ?
Movement 2 и и и ? exterior back cover 5.3 'и и и lead spring member 4.4' и и и spring member set
screw 5 и и и metal deposition electrode 6 и и и piezoelectric element 7 и и и и Conductive adhesive 8 и и
и Metal deposition electrode 9 и и и I! ???? Housing 10 иии Adhesive 5-L и и и Boosting coil Tr и и и
Drive transistor + + I и и и и и и и и и и more than 3 6? FIG. 1 FIG. 2?44 knees. Figure 62 also shows
404'3 '543 one nishi J (? -6 note-row 1213 V ,. 10 qs 62 Il, "(" ",-to blue)
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