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Since the step 27 and the second step 28 are also combined, the workability can be further
improved when the stepped horn 26 is used. The present invention has various excellent effects
as described above, and the effects exerted are extremely large.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a conventional example
in which a first instep is shown as a partial side eutectoid surface, and FIG. 2 is an explanatory
view of an embodiment of the present invention in which a part is in cross section.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high amplitude
vibrator formed by clamping and holding a horn and a langeban vibrator with a single bolt. In
general, a Lanrevan-type vibrator is composed of a vibratory element composed of a substance
exhibiting a piezoelectric phenomenon or an electrostrictive phenomenon and an electrode plate
attached to the end face thereof, and two resonators provided on both end faces of the vibratory
element. It is configured. Heretofore, as described above, such a run-leban type vibrator is
formed by adhering and holding the respective members constituting the vibrator with an
adhesive to each other, and in use, the horn is used similarly to the end face of the vibrator. The
vibrational amplitude of the vibrator is expanded by bonding with an adhesive. However, in this
method of using an adhesive, there is a disadvantage that the initial pressure necessary for
improving the operation characteristics of the vibrating element comprising an electrostrictive
element can not be applied, or adhesion of the adhesive Due to limitations in force, problems
with strength have resulted in large transducers not being available, or relatively small
transducers that can not be operated at large amplitudes. Also in the prior art, there have been
attempts to solve the above-mentioned drawbacks, such as those found in C, for example,
Japanese Patent No. 312607. In this patent specification and drawings, as indicated by a solid
line in FIG. 1, a vibrating element 3 comprising a substance 1 exhibiting an electrostriction
phenomenon and an electrode plate 2 attached to the end face, and the vibrating element 3
There is introduced a Runleban type vibrator in which resonators 4 and 5 provided on both end
faces of are tightened by one bolt 6. In this method, initial tightening can be applied to the
substance 1 exhibiting an electrostriction phenomenon by tightening with a bolt 6, and the
strength is superior to when an adhesive is used. Generally, a lan-leban type vibrator is used by
attaching a horn to its end face for expanding the amplitude of the vibrator, but in the case of
attaching the horn to the conventional vibrator, the method using an adhesive is as described
above. Since there is a problem in terms of strength as described above, it is conceivable to
attach the resonator 4 and the horn 7 with bolts 8 as shown by the broken line in FIG. However,
as shown in the drawing, although the threaded portion is formed from both end faces of the
resonator 4, as is well known, the resonance frequency of the Lanrevan type vibrator is
approximately the length from the resonator 4 to the resonator 5 Therefore, it is not possible to
freely make the original body of the resonator 4 large. Accordingly, since the screw portion
provided in the resonator 4 can not be made deep enough, the tightening of the bolts 6 and 8
can not make the force and the holding force large.
Of course, in this case, the size of the resonator element 4 may be increased by reducing the
original size of the vibration element 3. However, in this case, since the vibration element 3
becomes thin, the driving force itself is small even if the problem is solved in strength. It has the
disadvantage that it is not suitable for large amplitude. An object of the present invention is to
provide a large amplitude oscillator which completely eliminates the above-mentioned
conventional drawbacks and further has the excellent effects as described below. An embodiment
of the present invention will be described below with reference to the drawings. In FIG. 2, 20 is
zirconate titanate W1111111 EndPage: 3
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