SU647636A1 - Electronic wristwatch - Google Patents

Description

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The invention relates to the field of instrumentation, in particular to the manufacture of electronic watches.

Electronic wrist watches are known that contain an indicator, a signal device and external controls 1.

The closest in technical essence and the achieved result is an electronic wrist watch containing a master oscillator, a matching device, a power supply battery, a membrane with a piezoelectric transducer fixed on it, the input of which is connected to the output of the master oscillator through a matching device connected by a power supply {2J

Known electronic watches have low economy and short battery life.

The purpose of the invention is to increase the reliability of electronic watches.

To achieve the goal, the proposed electronic wristwatches are equipped with a rectifier and a mosaic piezoelectric transducer, each mosaic element of which is made in the form of a piezoelectric bimorph transformer consisting of two Rosen piezoelectric elements,

polarized in opposite directions, while the output of the piezoelectric transducer is connected via a rectifier to a power supply battery.

FIG. a block diagram of the proposed device; in fig. 2 - mosaic element of the piezoelectric transducer.

The device consists of a master oscillator I, connected via matching device 2 with a mosaic piezoelectric transducer 3 located on the membrane 4. The piezoelectric triple converter 3 is connected via a rectifier 5 to a battery 6 connected to matching device 2.

The piezoelectric transducer mosaic element consists of two Rosen piezoelectric elements 7 with input and output electrodes 8 and 9, respectively.

Electronic wrist watches work as follows.

Claims (2)

At the moment the electronic circuit triggers, an electrical audio signal from the output of generator 1 through matching device 2 is fed to the input of piezoelectric converter 3. Matching device 2 serves to optimally match the output impedance of master oscillator 1 of electric oscillations and input impedance of piezoelectric converter 3, oscillations 3 are converted to acoustic and excite the bending vibrations of the membrane 4. The sound is fed signal. In order to optimally match the variable load of the converter 3 with the nocTdifHHbiM output impedance of the generator 1, the matching device 2 is controlled by a feedback circuit removed from the piezoelectric converter 3, the output of which is connected via a rectifier to the power supply battery 6. During operation of the signal device battery 6 is recharged. With a whole increase in the excitation efficiency of acoustic oscillations, the bezoelectric transducer 3 is made mosaic. Each element of the mosaic is a piezoelectric transformer, made bimorphic and consisting of: three Rosen's piezoelectric elements, 1: 10 lzovannyh, h.v opposite directions. A piezoelectric element. Rosena is a transverse-longitudinal piezoelectric transformer in which the exciting electric field is perpendicular to the direction of propagation of longitudinal acoustic waves, and the excited electric field coincides with the direction of propagation of acoustic waves. Optimum matching of the master oscillator I and the piezoelectric transducer 3 using feedback via rectifier 5 with battery 6 allows to reduce the energy loss of electrical oscillations and increase the service life of the power supply battery. An electronic wristwatch containing a master oscillator, a matching device, a power supply battery, a membrane with a piezoelectric transducer fixed on it, the input of which is connected to the output of the master oscillator through a matching device, which is designed to improve reliability The device is equipped with a rectifier and a mosaic piezoelectric transducer, each mosaic element of which is made in the form of a piezoelectric bimorph transformer and consisting of two piezoelectric elements Rosen polarized in opposite directions, the output of the piezoelectric transducer is connected via a rectifier to the battery power. Sources of information taken into account in the examination 1. US patent number 3906713, cl. G 04 C 21/00, 1975. 2. For the UK of UK number 1382704, cl. G 04 C 21/22, 1975. g 77/7 // // // 7777Y Wrigle FIG. 2