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DESCRIPTION JPS55124998

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DESCRIPTION JPS55124998
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front sectional view of a typical typical
screw-fasted Langevin-type vibrator cited to explain the present invention, FIG. B is a front
sectional view of the piezoelectric element according to the present invention. 1.11 иии и и и и и
Piezoelectric elements, 2 и 12 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и screw member
1a, 11a и и и и и roundness.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a screw-clamped
Langevin type vibrator in which a piezoelectric element is held between a pair of metal brakes
and integrally coupled by a suitable screw member. In this kind of Langevin type imaging
actuator, various structures are known as a structure of a fastening portion of a piezoelectric
element and a metal block. As shown in FIG. 1 as its two typical sides, an annular piezoelectric
element /, as shown in FIG. Nine things put in place between 9.2. As shown in the first drawing,
using the plate-like piezoelectric element /////, the outer periphery of the piezoelectric element
[a large number of outer peripheral bolts / 3 ... inserted through the method fll] ... There is one
inserted between / ?. However, in such a screw-clamped imaging motor, in either case, the edge
(the crossing portion between the flat direction and the side surface) of the earth dragon element
is at a right angle, so compressive stress at the time of tightening is concentrated at the edge of
the piezoelectric element. It was easy, and there was a fire report that a crack was generated in
that part when ultrasonic vibration was superimposed during use. In addition, even if it is
exposed to high temperatures before use, it is easy to generate cracks due to excessive
concentration of thermal stress on the edge of the pressure element if it is exposed to severe
temperature changes of ?seed? -quenching. I also did something. This proposal was made in
view of the above-mentioned circumstances, and J'IIA and B, 1 and C, an annular piezoelectric
element t L which is used for a supplementary movement actuator, and it is a thousand inner
circumferences. This is a book with a roundness / a on the edge of the and a spring-clamped
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moving element with a history-like stone-plate-like piezoelectric element for a history / / and a
roundness / / a on the edge of the outer circumference. The formation of the b round / a /// a on
the edge of the piezoelectric element // l / can be easily ground by K such as diamond grinding,
liquid honing, barrel grinding and the like. According to the above-mentioned drafting plan, since
the edge of the piezoelectric element is rounded, the compressive stress and the thermal stress
applied to the edge can be dispersed to reduce the influence by the concentrated stress, and
therefore the Khunnok Not only does it occur, but the useful life of the vibrator can be reduced,
and the edge of the piezoelectric element with a sister does not have any accidents such as
chipping often encountered during assembly because mechanical strength is improved. There are
other benefits to
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