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BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 are both side sectional views showing the
shape and structure of a conventional ultrasonic probe embodiment, and FIGS. 3 and 4 show the
embodiment of the present invention. It is a side sectional view in the case of an example. 31,41
...... cylindrical case, 32 and 42 ииииии vibrator, 34.44- ..... acoustic ?? surface. Year 2 Figure 1 ?1
4 Figure 1 229
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the shape of the
acoustic emission surface of an ultrasonic probe using an electrostrictive transducer, and in
particular, the improvement and characteristics of the reliability of an ultrasonic probe as a
medical device. Aim to reduce the variation of Conventionally, when the transducer used in this
type of ultrasonic probe jd has a disk shape, the acoustic radiation surface thereof is a thin resin
or the like in which the transducer is completely in close contact with the back surface in a
portion corresponding to the bottom surface of the cylindrical case. Generally, a disc is bonded or
an imaging element is fixed to a cylindrical case, and a coating such as a resin is formed on the
outer surface of the vibrator by coating. However, in these conventional cases (1), the acoustic
radiation surface is made of a resin or other material such as a resin and the like, or a relatively
thin resin or other disc such as a resin or the like determined by the ultrasonic wave frequency. It
has to be formed, and during use, a thin plate of resin or the like may be cracked or a coating of
resin or the like may separate from each other. Further, in the method of bonding a resin or the
like, it is difficult to make the film thickness of the coating surface constant, and as a result, there
is a problem that the characteristics of the ultrasonic probes differ from one another and lack of
compatibility. The present invention solves the above problems and will be described below with
reference to the drawings. 1 and 2 are side sectional views showing the shape and structure of
an embodiment of a conventional ultrasonic beam splitter, wherein a cylindrical case 11.21 and a
disc 14 ░ such as a thin resin or a film 24 ? ? The sound emitting surface 14.24 forms the
outer surface of the ultrasonic beam constrictor. In the case of the embodiment shown in FIG. 1,
the thickness of the resin or the like forming the acoustic radiation surface 14 is optimally one
wavelength of ultrasonic waves using one wavelength in the case of the embodiment shown in
FIG. However, the length of the i wavelength or one wavelength calculated from the wavelength
determined from the frequency of ultrasonic waves (2) usually handled and the propagation
velocity of sound waves in materials such as resin is 1 or less In such cases, it is necessary to
bond the thin plate 14 ░ of such a thin resin to the cylindrical case 11 or to form a coating 24
'of an equivalent resin paper sheet by coating, which also takes time and effort from the
viewpoint of production. The structurally stable one 1 to the contrary In the embodiments of the
present invention shown in FIGS. 5 and 4, the cylindrical case 31.41 and the acoustic radiation
surface 54.44 of the ultrasonic probe are all available. And the resin is used to form a single
structure by molding. Cylindrical case! The internal structure of 1, 4j is not much different from
that of the conventional ultrasonic probe, and the back of the acoustic wave incident surface 54,
44 is in close contact with the disk or the imaging forceps 32. 42 in the shape obtained by
dividing the disk. Lead wire 33 from the electrode 36 ░ 346 which is formed on the surface
opposite to the surface where it is closely attached to the +. .
++ is drawn out and guided to a terminal plate 55 ░ 45 provided on the upper surface of the
cylindrical Z-shaped, -T, E case 31.41. Here, the material of the resin register used for the
cylindrical (5) case 31.41 is a chemical resistant resin, for example, epoxy, Boria (D, AB8 $ resin
material) in consideration of frequent chemical disinfection. There is. The embodiment shown in
FIG. 3 is a combination of transmission and reception, and the embodiment shown in FIG. 4 is a
transmission and reception separation type. Reference numeral 46 in FIG. 4 denotes an acoustic
shielding plate, and 47 denotes an electric shielding plate, which constitute a separation
structure. Such an ultrasound probe is used, for example, for labor monitoring, and detects a
heart beat sheet of a fetus. As described above, in the ultrasonic probe according to the present
invention, since there is no groove or gap between the outer surface of the case and the adhesive
structure, the surface is uniformly smooth, so cleaning and disinfection are easy to be carried out.
There is no case where the case is worn resistant. Also, since the acoustic radiation surface that
constitutes a part of the cylindrical case is formed by integral molding as compared with the
conventional resin register adhered or coated, it is possible to suppress the variation of the
thickness dimension to a certain extent, and the characteristics It is relatively strong in terms of
mechanical structure and excellent in mass productivity (4), so it has a series of effects such as
reduction in manufacturing cost, which is a major contribution to the medical device field. The
idea is
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description, jps5246600
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