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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing an embodiment
of a wristwatch incorporating a piezoelectric buzzer according to the present invention, and FIG.
2 is a block diagram showing an example of an electric circuit of the same piezoelectric buzzer. It
is. DESCRIPTION OF SYMBOLS 1 ... Piezoelectric porcelain element 2 ... Adhesive agent 3 ... KM of
a watch, 11 ... Bidirectional analog multiplexer-8
[Detailed description of the invention] The present invention uses a watch's back cover as a
diaphragm and a piezoelectric ceramic element bonded to it l 'in a watch pressure buzzer as a
bidirectional analog multiplexer. The path is switched, and the pulse from the surface of the
human body is directly converted to an electrical signal by the piezoelectric ceramic element via
the diaphragm), and has a power as a pulsimeter sensor (-10X at arm) L ' It is an object of the
present invention to provide a "-L-durable piezoelectric buzzer. z "-1" 2 First, as shown in FIG. 1,
the piezoelectric buzzer 1 according to the present invention has a piezoelectric ceramic device 1
made of metal or synthetic resin with an adhesive 2 or the like. Has a structure bonded to the
inside of the In FIG. 1, 1 is a side barrel, 6 is a surface glass, 6 is a liquid crystal display, 6 is a
movement, 8 is a signal output line, and 9 is a band. In the piezoelectric buzzer for a watch of the
present invention, as shown in the circuit example of FIG. 2, the alarm signal from the oscillator
circuit 10 generating the alarm or melody signal 1 transmits the melody signal through the
bidirectional analog multiplexer -11. The voltage is applied to the piezoelectric ceramic element 1
to operate as a sound generator. The control signal is applied to the bi-directional analog
multiplexer 11 through the mono staple multivibrator 12 which switches the changeover switch
SW to generate a single pulse, and the multiplex filter circuit 13 which generates the control
signal. If the switching operation is performed, it will be used as a vibrating plate at the time of
the self-time-------------------------------------heart rate of the surface of the human body f: m converted
to mechanical vibration, its vibration by 105 '/ 3 movement The porcelain element 1 is distorted
and generates a voltage. This voltage can be taken out from line 8 as an electrical pulse
synchronized with the pulse. Then, the pulse signal of is amplified by a high input inoheathance
amplification h??g) through the bi-directional analog multiplexer 11 to a required size ?, and
the 1 pulse pulse counter circuit 15 is used to generate Count pulse pulse of unit time with
reference pulse. The pulse rate is displayed on the liquid crystal display 6 by the function of the
display drive circuit 17. In addition, the above-mentioned on-lator circuit 10% bidirectional
analog multiplexer-11, multivibrator 12. Flip front circuit 13. Amplifier 14. Counter circuit 15.
The reference time generation circuit 16 and the display drive circuit 17 are incorporated in the
movement 7 together with a clock circuit unit (not shown). As apparent from the above, the
present invention provides a watch piezoelectric buzzer that can be applied as an electronic
pulsimeter / cell, and its practicality is great.
10, ') Brief description of h44.1 surface j Figure 1 is a cross-sectional view showing an
embodiment of an arm watch incorporating a piezoelectric buzzer according to the present
invention, and FIG. It is a block diagram showing an example of a circuit. 1 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 back of the watch, 11 и и и и и и и two-way PI
analog multi-sensor. Name of agent Attorney Nakao Toshio and others 1) 10;), Figure 1 55.75.7 =
? и 1 Fig. 2 cc 2 SW / 37 ? 1/714 1 1 jul J Name of agent ? 1346 ('l patent attorney's office
Nakao Toshiyu 6 Other agent address in Osaka Prefecture Kadoma city Ogata Kadoma 1006
Matsushita Electric Industrial Co., Ltd.? Name within L (6152) Patent attorney Shigetaka Ogino
(% Yuji :) 1 limit 6 q 10 t
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