JP2000022474

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DESCRIPTION JP2000022474
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
bonding method of an ultrasonic transducer in which the ultrasonic transducer is bonded to a
vibrating plate or quartz glass so that the ultrasonic transducer does not break.
[0002]
2. Description of the Related Art Conventionally, in order to bond an ultrasonic transducer to a
stainless steel diaphragm or quartz glass, an adhesive is attached on the diaphragm or quartz
glass, and the ultrasonic transducer is placed thereon. It was pressed and mounted, heat was
applied to the diaphragm and ultrasonic transducer or quartz glass and ultrasonic transducer,
and the ultrasonic transducer and stainless steel diaphragm or ultrasonic transducer and quartz
glass were bonded. .
[0003]
By the way, in the ultrasonic transducer and the stainless steel diaphragm, the coefficient of
thermal expansion of the stainless steel diaphragm is large, and in the quartz glass and the
ultrasonic transducer, the ultrasonic transducer is used. Because the thermal expansion of the
stainless steel diaphragm and the ultrasonic transducer or the quartz glass and the ultrasonic
transducer are all heated for bonding to harden the adhesive and then left to cool, the stainless
steel diaphragm In the case of the ultrasonic transducer, the contraction rate of the stainless steel
diaphragm is large, so the ultrasonic transducer is broken, and in the case of the quartz glass and
the ultrasonic transducer, the contraction rate of the ultrasonic transducer is Since the size is
large, even if the quartz glass is broken or not broken at the time of bonding, there is a problem
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that the same phenomenon occurs due to the heat generation during the running operation and
the life becomes short.
[0004]
SUMMARY OF THE INVENTION In the present invention, a mesh is placed on a metal diaphragm,
and an adhesive is injected into the mesh so that the adhesive adheres to the diaphragm. The
ultrasonic vibrator is pressed against the adhesive injected on the top of the mesh and placed,
and the whole is heated and left to cool, and is bonded to quartz glass instead of the diaphragm.
is there.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a mesh is placed on
a metal diaphragm or quartz glass, an adhesive is added to the mesh, and the adhesive is adhered
to the diaphragm or quartz glass, and The adhesive is injected into the adhesive, the ultrasonic
transducer is pressed against the adhesive, the whole is heated, and left cooled, the mesh absorbs
the difference between the expansion or contraction due to the heat of the diaphragm or quartz
glass and the ultrasonic transducer. It is possible to prevent the crack and the life of the
ultrasonic transducer or the quartz glass from being shortened.
[0006]
FIG. 1 is a side view for explaining a method of bonding ultrasonic transducers according to an
embodiment of the present invention, in which a mesh 2 is placed on a stainless steel diaphragm
1. An adhesive (not shown) is injected so that the adhesive adheres to the diaphragm 1, and the
adhesive is placed on the surface of the mesh 2 so as to be raised, and the ultrasonic transducer
3 is pressed thereon. After mounting, the stainless steel diaphragm 1, the mesh 2 and the
ultrasonic transducer 3 are heated at high temperature.
[0007]
After heating at a high temperature for a period of time during which the adhesive cures, if left
cooled, the stainless steel diaphragm 1 and the ultrasonic transducer 3 are bonded via the mesh
2. In this case, the ultrasonic transducer No. 3 has no cracks and there is an advantage that the
life can be greatly extended if the vibrator thus configured is used for running.
[0008]
FIG. 2 is a side view for explaining the bonding method of the ultrasonic transducer according to
another embodiment of the present invention, in which the mesh 2 is placed on the quartz glass
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4 and an adhesive (FIG. 2) (Not shown) is poured until it adheres to the quartz glass 4, and the
adhesive is placed on the mesh 2 until it rises, and after the ultrasonic transducer 3 is pressed
and placed on the adhesive, the quartz glass 4 is 4. Heat the mesh 2 and the ultrasonic
transducer 3 at high temperature.
[0009]
After heating at a high temperature for a period of time during which the adhesive cures, the
quartz glass 4 and the ultrasonic transducer 3 are bonded via the mesh 2 when left to cool, but in
this case, completely to the quartz glass 4. There is no crack and there is an advantage that
running use of this vibrating device greatly extends the life.
[0010]
Although a mesh made of relatively thin stainless steel wire may be used as the mesh, in the case
of bonding the ultrasonic transducer 3 to other than the stainless steel diaphragm 1 or the quartz
glass 4, Even when using a heat-resistant synthetic resin mesh, the same effect as in the above
embodiment can be obtained, and when bonding two members having different thermal
expansions, a mesh is interposed to obtain a difference in thermal expansion. You just absorb it.
[0011]
As described above, according to the bonding method of the ultrasonic transducer of the present
invention, the bonding of the ultrasonic transducer to the diaphragm or the like is carried out by
bonding through the mesh. Since the mesh can absorb the difference in thermal expansion, there
is an advantage that it is possible to prevent the ultrasonic vibrator or the bonded quartz glass or
the like from cracking or shortening the life.
[0012]
Brief description of the drawings
[0013]
1 is a side view illustrating the bonding method of the ultrasonic transducer of the embodiment
of the present invention.
[0014]
2 is a perspective view for explaining the bonding method of the ultrasonic transducer of another
embodiment of the present invention.
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[0015]
Explanation of sign
[0016]
1 diaphragm 2 mesh 3 ultrasonic transducer 4 quartz glass
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