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JPH0349760

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DESCRIPTION JPH0349760
[0001]
Industrial Application Field The present invention relates to, for example, an element pad of an
ultrasonic therapeutic device. <Prior Art> Generally, an ultrasonic treatment device applies an
element pad provided with an ultrasonic oscillator to an affected part or acupuncture point of a
human body, and irradiates ultrasonic waves from the ultrasonic oscillator to its five color parts
and the acupuncture point It is known to be effective for the treatment of low back pain,
neuralgia, even stiff shoulders, etc. In this type of medical device, if an air layer is present
between the element pad and the skin of the human body, the ultrasonic wave transmission rate
to the human body will be poor. For this reason, liquid paraffin or olive oil is applied to the
affected area etc. in -1′IQ for treatment, or a member 31 for protecting the ultrasonic oscillator
2 as shown in FIG. The treatment is performed using an element pad of a structure provided with
an ultrasonic medium 33 having high adhesion. <Problem to be Solved by the Invention> By the
way, according to the element pad having the structure shown in FIG. 3, the ultrasonic wave
generated from the ultrasonic oscillator 2 propagates straight or radially through the acoustic
matching layer 2a, Moreover, the strength becomes weaker as it is separated from the ultrasonic
wave generator. For this reason, for example, in the case of the acupuncture point in the deep
part of the human body, the intensity of the arriving ultrasonic wave is very weak and a sufficient
therapeutic effect can not be obtained. An object of the present invention is to provide an
ultrasonic element pad capable of focusing ultrasonic waves on a desired site such as a human
body. In the present invention, as shown in FIG. 1 corresponding to the embodiment, the
protective member 1 for protecting the ultrasonic oscillator 2 is different from the ultrasonic
medium 3 in the sound wave propagation speed. It is characterized in that it is made of a
material and at least one of the protective member 1 and the ultrasonic wave medium 3 is raised
inside. For example, when the protective member 1 is formed of a material whose acoustic wave
propagation velocity is slower than that of the ultrasonic medium 3 and the protective member 1
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1
is raised in the ultrasonic medium 3, the ultrasonic wave from the ultrasonic oscillator 2 is Since
the medium (the protective member 1) having a low sound wave propagation speed is incident
on the high-speed medium (the ultrasonic medium 3), the light is refracted at the interface
between the two, and the interface converges because the interface is convex. EXAMPLE FIG. 1 is
a longitudinal sectional view showing the structure of an example of the present invention. Inside
the oscillator protection member 1, an ultrasonic oscillator 2 provided with an acoustic matching
layer 2a is disposed. The ultrasonic wave propagating portion of the oscillator protection
member 1 is formed in a convex shape, and the ultrasonic medium 3 is formed in close contact
with the convex surface. The oscillator protection member 1 is formed of silicone rubber, and its
sound wave propagation speed is about 1000 m / sec.
On the other hand, the ultrasonic medium 3 is formed of a material, such as a gel, having a sound
wave propagation speed substantially equal to that of a living body (about 1530 m / 5 ec). With
the above-described structure, the ultrasonic waves from the ultrasonic oscillator 2 are refracted
and converged at the interface between the protective member 1 and the ultrasonic medium 3.
That is, an acoustic focusing lens is formed on the traveling path of the ultrasonic wave. Here, the
depth d at which the ultrasonic waves converge in the human body M is arbitrary by
appropriately selecting the materials of the resonator protection member 1 and the ultrasonic
medium 3 forming the acoustic lens, the diameter of the acoustic lens, and the like. It can be set
to When the oscillator protection member is formed of a material whose sound propagation
speed is faster than that of the ultrasonic medium, as shown in FIG. 2, the resonator protection
member 21 is formed in a concave shape, and By bringing the acoustic wave medium 23 into
close contact, an acoustic focusing lens can be formed. <Effect of the Invention> According to the
present invention, since the acoustic focusing lens is formed of the transducer protecting
member and the ultrasound medium on the traveling path of the ultrasound from the ultrasound
transducer, the ultrasound can be transmitted to the desired depth inside the human body or the
like. Can converge. As a result, for example, when treating the acupuncture point in the deep part
of the human body, it becomes possible to concentrate the ultrasonic wave on the acupuncture
point, and an extremely large therapeutic effect can be obtained as compared with the prior art.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a longitudinal sectional view showing the structure of the embodiment of the present
invention, and FIG. 2 is a longitudinal sectional view showing the structure of another
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2
embodiment of the present invention.
FIG. 3 is a longitudinal sectional view showing a structural example of a conventional ultrasonic
element pad. 1 ··· Transducer protection member 2 · · · Ultrasonic oscillator · Ultrasonic medium
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3
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