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JPS5639792

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DESCRIPTION JPS5639792
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial cross-sectional side view of a
conventional ultrasonic horn, and FIG. 2 is a partial cross-sectional side view of an embodiment
of the present invention. 8: Vessel horn main body, 10: insect-repellent wire mesh, 11: ringshaped holder.
DETAILED DESCRIPTION OF THE INVENTION The invention relates to an ultrasonic horn. In the
conventional ultrasonic horn, as shown in FIG. 1, the ultrasonic transducer 2 is attached to the
throat 1m of the vessel horn main body 1 and the radiation port 1b is covered with the insectproof gauze 3 to hold the ring shape in cross section The insect repellent mesh 3 is attached to
the vessel horn main body 1 by the body 4, and this vi insect all-metal mesh 3 attachment is the
opening edge of the case 6 with the collar 5 formed in the radiation port 1b and the outer JII
edge of the insect repellent mesh 3. And the ring-shaped holder 4 bonded to the opening edge of
the case 6. In addition, 7 is a (1) green-fixing device. However, in such a conventional ultrasonic
horn, a step is generated between the inner peripheral surface of the ring-shaped holder 4 and
the inner peripheral surface of the vessel horn main body 1, and the directivity of the ultrasonic
radiation changes. There was a problem. Therefore, an object of the present invention is to
provide an ultrasonic horn capable of preventing a change in directivity characteristics due to the
insect screen being brazed. One embodiment of this invention is shown in FIG. This ultrasonic
horn is attached to the throat 8fiK ultrasonic transducer 9 of the vessel horn main body 8 and
covers the radiation port 8b of the vessel horn main body 8 with the insect-proof gauze 10 so
that the ring-shaped holding body 11 is used. The insect screen 10 is attached to a vessel horn
body 8 and housed in a case 12. In this case, the inner circumferential surface of the ring-shaped
holder 11 is smoothly and continuously formed on the inner circumferential surface of the vessel
horn body 8. That is, the inner peripheral surfaces of the vessel horn body 8 and the ring-shaped
holder 11 are continuous curved surfaces without steps. Also, bonding (2) between the vessel
horn body 8 and the ring-shaped holder 11? IA is made uneven to widen the contact area
02-05-2019
1
between the vessel horn main body 8 and the ring-shaped holder 11. Incidentally, reference
numeral 13 denotes a lead wire connected to the ultrasonic transducer 9, reference numeral 14
denotes a fixing tool, and reference numerals 15 and 16 denote screws. As described above, in
the ultrasonic horn according to the present invention, the inner peripheral surface of the ringshaped holder is smoothly and continuously formed on the inner peripheral surface of the vessel
horn body, so that the shape of the ultrasonic radiation surface is not changed. As a result, there
is an effect that it is possible to prevent a change in directivity characteristics due to the
installation of the protection net.
02-05-2019
2
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