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JPS5551566

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DESCRIPTION JPS5551566
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present ultrasonic
transducer device, FIG. 1 is a perspective view, and FIG. 2 is an enlarged sectional view. X · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·. · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a so-called
ultrasonic transducer device such as a ceramic microphone. The ultrasonic transducer applies an
electrical signal to the input terminal to vibrate the piezoelectric element. Thus, the vibration of
the piezoelectric element and the resonator lasts for a long time after removing the electric signal
applied to both terminals. This is called reverberation and there are many causes. The present
invention has been made in view of the above points, that is, a cap made of a cushion material
and housed at the end of the vibrator main body and the horn and made of a cushioning material
is provided at the end of the water-on. The input terminal is penetrated and the heel is also
crowned so as to press down the base, thereby eliminating the cause of the reverberation due to
the vibration transmitted to the outer periphery of the vibrator main body. The following
description will be made based on the drawings showing the present invention as one
embodiment: X is a vibrator main body and is mounted on a base 2 with an input terminal l
projecting from one side and the other side Ifl of this base 2 It comprises a piezoelectric element
and a resonator 4. 51 is a horn, and the vibrator main body X is accommodated in the end
portion 6. Reference numeral 7 denotes a cap made of a cushioning material such as rubber,
which is crowned so as to project the input terminal 4 and the base 2 is also pressed. Thus, the
cushion of the cap 7 absorbs the vibration and reduces the reverberation. In the present
invention, the vibrator main body X is housed at the end 6 of the horn 5 as described above, and
the cap made of the cushion material penetrates the input terminal 1 to the end 6 of the horn 5
to press the base 2. Since the crown is attached, the reverberation due to the vibration cause of
the outer periphery of the% oscillator main body X can be reduced, and the reverberation can be
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reduced without lowering the sensitivity of the oscillator.
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