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Specification L. Name of the Invention Ultrasonic generator Ill In the ultrasonic light-vibrator 1
having a resonant plate attached to an ultrasonic transducer, a flexible film is formed on all or
part of the iIi plane of the resonant plate. An attached ultrasonic generator.
2, the scope of claims
Detailed Description of the Invention As shown in FIG. 1, a conventional ultrasonic generator
comprises an ultrasonic transducer 1 having a pair of electrodes appropriately attached to a
piezoelectric crystal piece in a case 2 including a sponge 111H 43 and the like. Of the resonance
plate 6 in the form of a conical plate on the shaft 5 connected via the flexible leads to the
terminals 4 and 4 attached to the case 2 with the pair of electrodes being attached to the case 2
The top is fixed through, and the inner surface of the resonance @ 6 is opposed to the opening 8
with the protective net of the case 2 stretched. However, when the voltage of the predetermined
frequency is intermittently applied between the pair of electrodes of the ultrasonic transducer 1
and the ultrasonic wave is intermittently emitted, the resonance M6 is generated even after the
application of the voltage between the pair of electrodes is cut off. However, the ultrasonic waves
can not be stopped immediately after the applied voltage is shut off, and the ultrasonic waves can
not be emitted intermittently at short intervals. The present invention eliminates the abovementioned conventional defects, and the embodiments of the present invention will be described
below with reference to FIGS. 912 and 3 (in the embodiment of the present invention, the same
parts as in the conventional example are identical). Use the code. And 1, 1 is an ultrasonic
transducer formed by attaching a pair of electrodes to a piezoelectric crystal piece, 2 is a case,
and the ultrasonic transducer 1 is disposed in the case 2 via a buffer 3 . ** The material is sponge
or cotton made of fibers. Reference numerals 4 and 4 'denote terminals to be attached to the
kennis 2. The pair of electric machines are respectively connected to these terminals by flexible
lead wires. Reference numeral 6 denotes a conical plate-like resonant plate, the top of which is
fixed through a shaft 5/2 fixed to the ultrasonic transducer 1. Also, the top of the resonance plate
6 may be bonded and fixed directly to the ultrasonic transducer 1 without using the shaft 5.
Thus, the flexible film 9 is attached to all or part of the plate surface of the resonance #i 6.
Flexibility @ 9 is made of an adhesive tape, EndPage: 1 rubber film, synthetic resin film. 8 is an
opening formed in case 2 to face the inner surface of resonance @ 6. A guard net 7 is stretched in
the hearing section. The present invention is configured as described above, when intermittently
applying a voltage of a predetermined frequency to the pair of electrodes of the ultrasonic
transducer 1 and intermittently emitting eight or two extreme sound waves, the applied voltage
between the pair of electrodes The vibration of the resonance plate 6 is rapidly reduced by the
flexible film 9, and it is possible to stop the two ultrasonic waves immediately after the
interruption of the applied voltage. As described above, according to the present invention, an
ultrasonic wave generator in which a resonance plate is attached to an ultrasonic transducer (in
which the whole of the plate surface of one resonance plate or the attachment of a flexible film is
used. Therefore, after cutting off the applied voltage supplied to the ultrasonic transducer, the
vibration of the resonance plate can be rapidly reduced due to the presence of the flexible film to
quickly stop the ultrasonic wave, and the ultrasonic wave is intermittent at short intervals.
Straight: There is an effect that can be launched.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional
ultrasonic wave generator, FIG. 2 and FIG. 3 show an embodiment of the present invention, and%
9M2 is a cross-sectional view, and FIG. FIG. 1 is an ultrasonic transducer, 2 is a case, 3 is a
relaxation material, 4.41 is a terminal, 5 is an axis, 6 is a resonance plate, 7 is an opening-8 a
protective net, 9 is a flexible film . Patent Assignee Matsushita Electric Works Co., Ltd. Attorney
Takeshi Toshimaru Takemoto Toshimaru (2 others) 1st to 2nd) to 5th. 9EndPage: 2
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