JPH0377560A - Low frequency treatment device - Google Patents

Abstract

PURPOSE:To prevent the generation of habituation in the stimulation to a human body mounting a polarity reversal circuit reversing the polarity of a pulse at every one pulse or two or more pulses. CONSTITUTION:A polarity reversal circuit 3 reversing the polarity of a pulse is added to a conventional circuit. This polarity discrimination circuit 3 is constituted of transistor Tr2-Tr5. That is, the transistors Tr2, Tr4 and transistors Tr3, Tr5 are respectively connected in series and directors 2a, 2b are connected between both junction points and a control pulse is inputted to the bases of the transistors Tr4, Tr5 from a control circuit 1. By this method, the habituation of the stimulation to a human body is not generated and, when the shoulder is stimulated, an alternately patting feeling is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a low frequency treatment device that periodically applies continuous pulses.

[Prior Art] Conventionally, this type of low-frequency treatment device periodically applies continuous pulses of the same width and amplitude to a conductor attached to the human body.

FIG. 4 shows a conventional circuit diagram, which includes a control circuit 1 consisting of a microcomputer, transistors Tr, Tr2, capacitors C, ,C, and a pair of conductors 2a attached to the human body.
, 2b, etc.

FIG. 5 shows a time chart of voltages at points A to D in FIG. 4.

The control circuit 1 outputs continuous pulses as shown in FIG. is charged as shown in FIG. 5(b). In other words, the transistor Trl
The charging voltage (1) of the capacitor C1 is controlled by the number of times of switching.

Further, the charging voltage VI can also be controlled by the volume VR. ilJ of the control circuit 1 shown in FIG. 5(c).
By controlling the transistor Tr2 to turn on with the control pulse, a pulse having an amplitude VHH corresponding to the charging voltage of the capacitor CI as shown in FIG. 5(d) is output to the conductors 2a and 2b. This operation is repeated and the conductors 2a, 2b
In other words, continuous pulses < 1 pressure V + + on the human body)
is applied to stimulate the human body.

[Problems to be Solved by the Invention] Therefore, in the conventional low-frequency treatment device, when the intensity is set, the stimulation does not change, so the patient tends to get used to the stimulation.

The present invention has been provided in view of the above points, and includes:
The object of the present invention is to provide a low frequency treatment device that does not cause the human body to become accustomed to stimulation by reversing the polarity for each pulse or multiple pulses.

[Means for Solving the Problems] The present invention includes a polarity inversion circuit that inverts the polarity of one pulse or a plurality of pulses.

[Function] The polarity inversion circuit inverts the polarity for each pulse or for each pulse.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. First, the waveforms of each mode will be explained.

FIG. 1 shows a waveform in the beating mode, in which the polarity is reversed for each pulse. Alternatively, a plurality of pulses may be set and the polarity may be reversed for each set, or the period of one pulse may be set to 3 to 4 Hz.
In this case, it has the effect of improving blood circulation.

FIG. 2 shows a circuit diagram in which a polarity inversion circuit 3 for inverting the polarity of a pulse is added to a conventional circuit.
are transistors Tr2 to Tr! It is composed of etc. That is, the transistors Tr2 and Tr and the transistors Tr= and Tr5 are connected in series, the conductors 2a and 2b are connected between the reconnection points, and the transistors Tr,
, T r 5 receives an Mll pulse from the control circuit 1 at its base. FIG. 3 shows waveforms at points A to E in FIG. 2.

As shown in FIGS. 3(a) and 3(b), the capacitor C is supplied with a voltage V by continuous pulses from the control circuit l as in the conventional case.
Then, as shown in FIG. 3(e), the transistor Tr is charged to 1 by the control pulse from the control circuit 1.
is turned on, and as shown in FIG. 3(e), the conductor 2
There is a voltage V between a and 2b.

Then, the transistor Trg is turned on by the control pulse from the control circuit 1 shown in FIG. 3(d), and the voltage - with the polarity reversed as shown in FIG. 3(e) is applied.
(1) will be applied between the conductors 2a and 2b. Thus, the transistor Tr.

By alternately switching Tr5, the direction of the current flowing through the conductors 2a and 2b attached to the human body can be alternately reversed, and in particular, one pole stimulates the muscles more than the positive pole. Since the polarity is strong, by switching the polarity alternately, the stimulation of the muscles in the areas to which the conductors 2a and 2b are attached can be felt alternately. Therefore, it is possible to prevent the human body from becoming accustomed to the stimulation, and when the shoulder or the like is stimulated, it feels like being hit alternately.

Furthermore, by continuously inputting the control pulses output from the control circuit 1 to the transistor Tr or Tr5, the polarity can be inverted for every plurality of pulses without changing the configuration of the polarity inversion circuit 3. It is.

[Effects of the Invention] As described above, the present invention is equipped with a polarity inversion circuit that inverts the polarity every one pulse or a plurality of pulses. The polarity can be reversed, so that
This has the effect of preventing the human body from becoming accustomed to stimulation.

[Brief explanation of drawings]

FIG. 1 is a waveform diagram showing the beating mode of the embodiment of the present invention;
FIG. 2 is a circuit diagram similar to the above, FIG. 3 is an operational waveform diagram similar to the above, FIG. 4 is a circuit diagram of the conventional example, and FIG. 5 is an operational waveform diagram similar to the above. 3 is a polarity inversion circuit.

Claims (1)

[Claims] (1) A low-frequency treatment device that periodically applies continuous pulses, characterized in that it is equipped with a polarity inversion circuit that inverts the polarity for each pulse or plural pulses.