Surgery – Truss – Pad
Patent
1981-02-17
1983-02-08
Cohen, Lee S.
Surgery
Truss
Pad
128422, A61N 136
Patent
active
043723195
DESCRIPTION:
BRIEF SUMMARY
FIELD OF ART
This invention relates to low frequency therapeutic instruments for performing therapies by applying to human body an electricity in the form of low frequency pulses.
BACKGROUND ART
In applying a low frequency to a patient in the case of conventional low frequency therapeutic instruments, if the low frequency of a high voltage is given from the beginning, it will not only shock and discomfort the human body but will be also sometimes even detrimental, and general usage of these therapeutic instruments has been such that the user gradually elevates the output of low frequency pulses with the volume or the like of an output adjusting circuit to use the instrument at a proper voltage. This is also the same in the case that the therapy of one portion of the human body ends and then a conductor is contacted with another body portion, thus the voltage must be elevated to a proper level at each time through a manual adjustment, and there has been involved a problem that the handling is complicate.
Further, in the conventional low frequency therapeutic instruments, the output wave form of the low frequency pulses is generally a rectangular wave form which is not particularly shaped in the wave form, and there has been a problem that a pain will be given to the patient in the rising part of the wave form.
DISCLOSURE OF THE INVENTION
A primary object of the present invention is, therefore, to provide a form very simple to handle a low frequency therapeutic instrument which shocks little the human body at the time of starting the therapy and is comfortable.
A secondary object of the present invention is to provide a low frequency therapeutic instrument with which, even if the portion of the human body to which the low frequency is applied is often changed, the foregoing function can be ensured.
A third object of the present invention is to provide a low frequency therapeutic instrument which realizes a therapy with less pain during the therapy.
Now, in the present invention, the primary object is attained by detecting a contact of the patient with a conductor and controlling the low frequency pulse voltage with such detection signal so as to gradually elevate the voltage to be applied to the patient from a low voltage to a predetermined voltage, the second object is attained by detecting a separation of the patient from the conductor and reducing the low frequency pulse voltage to a low voltage and, further, the third object is attained by shaping the low frequency pulse output wave form so as to be rounded.
Preferred embodiments of the present invention will be described in the following detailed description with reference to the drawing.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a block diagram of a first embodiment of the present invention;
FIG. 2(a) is a time chart of the pulse generating circuit output of the first embodiment;
FIG. 2(b) is a time chart of the human-body detecting circuit output of the first embodiment;
FIG. 2(c) is a time chart of the output controlling circuit output of the first embodiment;
FIG. 2(d) is a time chart of the low frequency output of the first embodiment;
FIG. 3 is a circuit diagram of the first embodiment;
FIG. 4 is a block diagram of a second embodiment of the present invention;
FIG. 5(a) is a time chart of the output adjusting circuit output of the second embodiment;
FIG. 5(b) is a time chart of the pulse output terminal output of the second embodiment; and
FIG. 6 is a circuit diagram of the second embodiment.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 1 shows a block diagram of an embodiment of the present invention, which is formed in such that a pulse generating circuit 1, a boosting transformer 2 and an output adjusting circuit 10 formed of a variable resistor and the like are made to be a basic formation, to which a human-body detecting circuit 5 and an output controlling circuit 6 are added, and the output of the output adjusting circuit 10 is connected to a pulse output terminal 3 to which a low frequency therapeutic conductor (not
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patent: 3050695 (1962-08-01), Du Vell
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patent: 3645267 (1972-02-01), Hagfors
patent: 4102348 (1978-07-01), Hihara et al.
patent: 4224944 (1980-09-01), Roberts
patent: 4301794 (1981-11-01), Tapper
Chousa Hirotaka
Hosoe Mamoru
Ichinomiya Tsutomu
Kimura Rokusaburo
Nagayama Masayoshi
Cohen Lee S.
Matsushita Electric & Works Ltd.
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