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DESCRIPTION JPS495371

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DESCRIPTION JPS495371
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional front view of a
conventional ultrasonic transducer, and FIG. 2 is a longitudinal sectional front view of an
ultrasonic transducer according to the present invention. E и back plate 14 и и и и и и и и и и и и и и и и и и и и и
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
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и и и и и и и и и и и и и и и и и и и и и. Bud J figure M2 (8) one 11-
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of a Langevin-type bolted ultrasonic transducer, and as a kind of Z0 Langeban-type transducer,
as shown by m1 lW, a piezoelectric wire material such as a lead zirconate titanate compound The
two sides of the ring-shaped electrostrictive element (1) made by using a plurality of electrodes
and a plurality of Fi stripe electrostrictive elements are electrically connected in parallel Ell and a
front plate (2) and a backing plate (8) are applied to the outer surface thereof. Bolt hole of face
plate 49-5371-02 ? (4 screwed into central hole (5) of electrostrictive element (1) to screw 4 @
1), bolt (6) K nut from outside of backing plate (8) ff) can not be taken long because the screwed
and tightened screws and sands the screw holes (8) for connecting the horns etc. shown by the
dotted line and the front face I [?] dotted line So tighten the bolt (6) firmly and the metal front
plate ( 1. The plastic deformation occurs in the backing plate (8) and the nut (7), the compressive
force received by the piezoelectric element becomes uneven, and the periphery of the bolt (6), ie,
the periphery of the central hole (6) The part is not tightly tightened, and as a result, there is a
disadvantage that the electrostrictive element (1) is broken or heated during driving. From the
above point of view, when the electrostrictive element (1) is tightened by integrating the
conventional front plate with the horn and lengthening the bolt hole, the partial concentration of
the compressive force applied to the element is achieved. The purpose is to obtain a single
pointless transducer such as an 11 ? I pregnancy oscillator, the configuration of which is one
side of a cocoon-shaped electrode 1 & Kiko CLI) or a plurality of electrostrictive elements
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Electrically parallel and C connected and set a long bolt hole ?4 on one of the outside @, and
apply a back plate (d) to the other surface to set the front surface 1 [ A bolt (2) passing through
the center hole OBt of the electrostrictive element ?1 is screwed into a bolt hole ? of a hook,
and a bolt (2) is screwed and tightened with a bolt (2) from the outside of the backing gas. It is
The ultrasonic transducer of the present invention configured as described above has a bolt hole
@ 4 provided in the horn 02 as compared with a transducer in which the front plate ? and the
horn are separately provided since the horn rod also serves as the front plate. Since the
dimensions can be taken long enough, when it is bolted, the electrostrictive element aIK is
distributed all over without being concentrated on the periphery of the compressive force
company Holt ?0, so that the electrostrictive element a11 may be damaged or heated at the
time of driving There is no
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