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JPH0871504

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DESCRIPTION JPH0871504
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
compact, efficient, mass-produced ultrasonic transducer.
[0002]
2. Description of the Related Art Conventionally, an ultrasonic transducer used for an ultrasonic
transmitting / receiving apparatus for detecting a fish school in water or an ultrasonic atomizer
for humidifying a room outputs powerful ultrasonic waves. In order to make a large diameter, a
thick one is used.
[0003]
By the way, in recent years, a small ultrasonic transmitting / receiving apparatus used for a rearend collision preventing apparatus for an automobile or an ultrasonic atomizing apparatus for
spraying perfume instantaneously when a person approaches it is disclosed. Although small
ultrasonic transducers are desired for use, it has been difficult to make thin ceramic transducers
because thin ceramic transducers easily break.
[0004]
SUMMARY OF THE INVENTION In the present invention, a thin ceramic plate having a thickness
of 0.5 mm or less is bonded to a thin metal plate having a thickness of 0.5 mm or less, and
ultrasonic waves are applied to the metal plate. It bonds the concentration member.
03-05-2019
1
[0005]
In the present invention, a ceramic vibrator is bonded by bonding a thin metal plate to a thin
ceramic vibrator, and bonding an ultrasonic wave concentration member such as a hard foamed
resin or a metal horn to this thin metal plate. Provides ultrasonic transducers for atomizing
proximity sensors, trace amounts of perfume, etc. by concentrating and increasing the ultrasonic
waves generated from the ultrasonic concentration members even if the output of the ultrasonic
waves generated by can do.
[0006]
FIG. 1 is a side view of an ultrasonic transducer according to an embodiment of the present
invention, and FIG. 2 is a rear view of the ultrasonic transducer of FIG. A thin ceramic vibrator 2
with a diameter of 0.5 mm or less smaller than the metal plate 1 is bonded to the metal plate 1,
and a hard foamed resin 3 is bonded to the metal plate 1 as an ultrasonic wave concentration
member.
[0007]
In the ultrasonic transducer configured as described above, when the ultrasonic transducer 4 is
connected to the ceramic vibrator 2 and a signal of the frequency of the ultrasonic wave is input,
the ultrasonic waves are concentrated from the foamed resin 3. Since the ultrasonic wave is
generated by the person or the object approaching the foamed resin 3 and the reflected wave is
received by the ceramic vibrator 2 through the foamed resin 3, it can be used as an ultrasonic
transmitting / receiving apparatus.
[0008]
FIG. 3 is a side view of an ultrasonic transducer according to another embodiment of the present
invention, in which a thin metal plate 1 having a thickness of 0.5 mm or less and a thin ceramic
vibration having a diameter of 0.5 mm or less smaller than that are used. The flat 2 is bonded to
the metal plate 1 as an ultrasonic wave concentration member, and the other end is provided
with a protrusion 5a so that ultrasonic waves are concentrated.
[0009]
In the embodiment configured as described above, when the ultrasonic oscillator 6 is connected
to the ceramic vibrator 2 and a signal of the frequency of the ultrasonic wave is input, the
ultrasonic wave is concentrated on the projecting portion 5a of the metal horn 5 Occurs.
03-05-2019
2
[0010]
If a drop of perfume, for example, is dropped on the projecting portion 5a of the horn 5, the
perfume can be instantaneously atomized and the perfume can float around it, so that the
ultrasonic transducer of this embodiment is It can be used for ultrasonic fragrances.
[0011]
The present invention is not limited to the above-described embodiment. A simple fish finder, for
example, when used in shallow water by using a synthetic resin or metal of another configuration
as an ultrasonic concentration member It can also be used to prevent collisions of automobiles
and the like.
[0012]
As described above, in the ultrasonic transducer according to the present invention, a thin metal
plate having a thickness of 0.5 mm or less and a thin ceramic vibrator having a diameter of 0.5
mm or less smaller than the thin metal plate are used. Can be used as a small-sized, small-output
ultrasonic transmitting / receiving device or ultrasonic atomizing device by bonding an ultrasonic
concentration member to the metal plate 1 and thus, a proximity sensor or a collision preventing
sensor or There are advantages such as being able to be used as a fragrance.
[0013]
Brief description of the drawings
[0014]
1 is a side view of an ultrasonic transducer according to an embodiment of the present invention.
[0015]
2 is a rear view of the ultrasonic transducer of FIG.
[0016]
3 is a side view of an ultrasonic transducer according to another embodiment of the present
invention.
[0017]
03-05-2019
3
Explanation of sign
[0018]
Reference Signs List 1 metal plate 2 ceramic vibrator 3 foamed resin 4 ultrasonic wave
transmitting / receiving device 5 metal horn 6 ultrasonic wave oscillator
03-05-2019
4
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