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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial plan view of a vibrator, and FIG. 2 is a
side view thereof. Explanation of symbols, 1 ... acoustic radiation surface, 2 ... lower transducer
piece, 3 ... upper transducer piece. Is it l? / 7′′31 station □ 107-
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the modification
of the ultrasonic transducer: JILK. Conventionally, as an ultrasonic transducer of high frequency
(toorg Z 9 degrees), high output, 1 (100711 degrees), small size 11 (1 so φ xao, about 2 kl), a
large number of square columnar vibrators arranged in a circle is used. It was However, such
conventional layers are inevitable. There is a gap at the outer periphery, and the space factor of
the acoustic radiation surface is reduced, and this also causes a defect that the horizontal
directivity worsens due to K. In addition, although there is one in which each vibrator piece is
formed into a door shape and configured in consideration of this defect, the manufacturing cost
of the vibrator piece is high, and the vibrator characteristics are not good. The object of the
present invention is the above-mentioned drawback of the prior art. Comb provides an ultrasonic
transducer with good horizontal directivity. The present invention is a turtle in which one or
more prismatic transducer pieces are arranged in a two-tiered, staggered arrangement in a circle
in order to achieve the above object. Hereinafter, an embodiment of the present invention will be
described in detail with reference to the attached drawings. FIG. 1 is a partial plan view of a
vibrator constructed according to the present invention, and FIG. 2 is a side view thereof. . In the
figure, a 2Fi lower transducer piece and a 5-piece upper transducer piece are shown, and 1 is an
acoustic radiation surface of each transducer piece. As shown in the figure, a plurality of square
columnar vibrator pieces are stacked in two stages, and arranged in a zigzag form so as to form
no gap at the outer periphery. As is apparent from the above embodiment, according to the
present invention, when the prism-shaped transducer element is used, the gap between the
transducer elements generated in the external station can be eliminated, so the haze of the
acoustic emission surface can be reduced. Low factor to □ 1 '= \ L' 2? It is possible to obtain an
ultrasonic transducer with good horizontal directivity without causing copying and lowering.