JP2014223234A - Ac potential therapy device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently generate sine wave AC of approximate 60-200 Hz to be inputted to a step-up transformer of an AC potential therapy device.SOLUTION: An AC potential therapy device independently and alternately performs switching control of respective positive and negative DC voltages by width modulated high frequency pulses of two systems obtained by pulse width modulation by sine half-wave signals of two systems in which phases are different from each other by 180° to obtain positive and negative width modulated amplification pulse outputs of two systems. Thereafter, the AC potential therapy device: independently and alternately demodulates the respective pulse outputs in a demodulation circuit having two choke coils, two diodes, and a single capacitor to obtain positive and negative demodulated sine half-wave outputs of two systems in which phases are different from each other by 180°; and alternately supplies the positive and negative sign half-wave outputs to a primary coil of a step-up transformer to convert high voltage sine wave AC generated in a transformer secondary coil into living body application AC in which a wave crest value ratio of a positive voltage crest value to a negative voltage crest value is one to three by a positive voltage bleeder circuit.

Description

  The present invention relates to an AC potential treatment device, and more particularly to improvement of a means for generating a sine wave AC input to a step-up transformer.

  As a conventional AC potential treatment device, for example, a positive voltage bleeder circuit provided in a secondary coil of a commercial AC step-up transformer as described in Japanese Patent No. 2609574 (Patent Document 1) uses a positive voltage and a negative voltage applied to a living body. An AC potential treatment device in which the ratio of the peak value to the voltage is set to 1: 3 is well known, and Japanese Patent Application Laid-Open No. 61-118346 (Patent Document 2) and Japanese Patent Application Laid-Open No. 2006-239032 (Patent Document 3). Such a potential therapy device is known in which an amplified output of a rectangular wave oscillation circuit is supplied to a primary coil of a step-up transformer, and a diode and a resistor are connected to the high voltage secondary coil of the transformer to obtain a rectangular wave high voltage.

  Patent Document 1 (Japanese Patent No. 2609574) discloses an alternating-current potential treatment in which a peak value ratio between an alternating positive voltage and a negative voltage is set to 1: 3 when an alternating high voltage is applied to a living body to perform treatment. Although an AC potential can be applied to a living body at a rate equal to the ideal abundance ratio of ions in a healthy human body, Patent Document 1 discloses a commercial power source as described in the only example in paragraph 0009 thereof. Since the alternating current is input to the step-up transformer, the biologically applied alternating current is limited to 50 Hz or 60 Hz in Japan.

  In recent years, among a large number of patients who are performing potential therapy with the AC potential therapy device of Patent Document 1 in Japan, several patients in the 60 Hz region west of Fuji River and Itoi River have been described as “in the 50 Hz region in the east. It seems that this treatment is more effective and quicker than the potential treatment, ”and there are some voices saying“ I'm not satisfied with it ”among multiple patients in the 50Hz region. It is starting to appear.

  On the other hand, since the Japanese Utility Model Publication No. 61-118346 and Japanese Patent Application Laid-Open No. 2006-239032 (Patent Documents 2 and 3) are both potential treatment devices having an oscillation circuit, the living body applied alternating current is not limited to the commercial power supply frequency, In each of these documents, as described in the only examples, the rectangular wave signal obtained by the rectangular wave oscillation circuit is output and amplified as it is, and is input to the primary coil of the step-up transformer, and the rectangular wave generated in the secondary coil. The biologically applied AC voltage having a waveform close to a rectangular wave as shown in FIG.

  Therefore, even if the class B bush-pull amplifier circuit is used for the rectangular wave output amplifier circuit in each of these documents 2 and 3, there is an essential problem that the efficiency is as low as 50% or less. Since the input and output of References 2 and 3 are both rectangular wave voltages, using a current general inexpensive booster transformer made of a core material and a stranded wire compatible with commercial power supplies can easily generate unwanted roaring noise. There is an essential big problem that it is easy to overheat.

  Furthermore, the living body impressed alternating current by the high-voltage rectangular wave output of each of the above-mentioned Patent Documents 2 and 3 is likely to cause harmful ringing, overshoot, and preshoot. Therefore, the living body impressed alternating current using a smoothly changing sine wave is used. Compared with potential treatment, each of these Patent Documents 2 and 3 has a tendency that unpleasant feeling like hot water is likely to remain after potential treatment, the effectiveness and rapid efficacy of the potential treatment effect are poor, and biological rejection occurs. There are specific and serious problems.

  In addition to the conventional examples according to Patent Documents 1 to 3, an alternating current waveform including a high frequency component is generated by a switching inverter as disclosed in Japanese Patent Application Laid-Open No. 2009-279024 (Patent Document 4), and this alternating current output is passed through a filter circuit. An electric potential treatment device that alternately supplies the primary coil of the step-up transformer or two high-frequency pulses that are separately input to the two step-up pulse transformers as disclosed in Japanese Patent Application Laid-Open No. 2011-24859 (Patent Document 5). A potential treatment device in which a diode, a smoothing capacitor, and an electrode are connected to the high-voltage secondary coil of each pulse transformer is also well known.

  JP-A-2009-279024 (Patent Document 4) is an open patent publication directly filed by the applicant, and only the known matters and desires are listed together with handwritten manga drawings. After all, it can be read from the description in paragraph 0011 that the potential treatment device uses a current class D audio amplifier based on pulse width modulation as an AC output circuit applied to the primary coil of the step-up transformer. However, since there is no description regarding the essential concrete circuit, even if those skilled in the art look at this Japanese Patent Laid-Open Publication, there is an essential problem that the potential treatment device cannot be made and cannot be implemented.

  Class D audio amplifiers include an amplifier with a full-bridge circuit configuration using two series of conduction control elements such as two power MOS FETs and bipolar transistors in series, and a half using only one series of two series conduction control elements. There is an amplifier with a bridge circuit configuration, and the half-bridge class D audio amplifier can be used inexpensively with a small number of components. However, the “bus pumping” phenomenon due to the self-induced current of the demodulation choke coil, etc. The class D audio amplifier with the full bridge circuit configuration can alleviate the above problem but requires twice as many parts as the half bridge configuration. The above-mentioned patent document 4 has no description at all and suggests that there are fundamental problems that are incompatible with each other. Et al. Is also the no.

  That is, the class D audio amplifier having a half-bridge configuration returns the self-induction current, which is about to flow out from the demodulation choke coil output side, to the input side from the coil output side when driving a load (step-up transformer). An amplifier circuit in which a low-frequency signal current caused by sound or other sound flows through a diode having excellent high-frequency characteristics, usually called a free wheeling diode, to suppress fluctuations in power supply voltage caused by a "pumping" phenomenon The above-mentioned Patent Document 4 also has a fundamental and serious problem that there is no portion that can be connected without distorting the low-frequency signal, and the fluctuation of the power supply voltage due to the above phenomenon cannot be eliminated. There is no.

  The class D audio amplifier of the current general half-bridge configuration is subject to fluctuations in the power supply voltage due to the “bus pumping” phenomenon when the load (step-up transformer) is bus-driven at a low frequency of 200 Hz or less. The degree is larger as the frequency is lower, the load impedance is smaller, the value of the DC capacitor and the bus capacitor connected to the load is smaller, respectively, when the duty ratio is 25% and 75%, There is no description or suggestion in Patent Document 4 that the fluctuation of the power supply voltage due to the harmful and unnecessary “bus pumping” phenomenon increases and the operation of the potential treatment device becomes extremely unstable.

  However, in a class D audio amplifier having a general full-bridge circuit configuration using two series of switching elements such as power MOS / FET having a parasitic diode in two rows, the “bus pumping” phenomenon is caused by the parasitic diode. Although the parasitic diode is largely different from the free wheeling diode, the high-frequency characteristics are poor and the reverse recovery time is long. Therefore, the self-induced current of the demodulation choke coil is reliably transmitted from the demodulation output terminal to the input terminal. In particular, when the load (step-up transformer) is bus-driven at a low frequency of about 60 to 200 Hz, as described in the paragraph 0012, the fluctuation of the power supply voltage due to the “bus pumping” phenomenon is completely eliminated. Power MOS with parasitic diode action and fundamental problems that cannot be wiped out FET is generally exotherm large, the problem that it is necessary strict heat dissipation, have no described at all in Patent Document 4.

  On the other hand, Japanese Patent Laid-Open No. 2011-24859 (Patent Document 5), as described in paragraphs 0020 and 0022, inputs two high-frequency switching pulses to two boosting high-frequency pulse transformers, respectively, A positive high voltage pulse voltage is obtained by a parallel circuit of a diode, a resistor and a smoothing capacitor connected to the high voltage secondary coil of the pulse transformer, and a diode, a resistor and a smoothing capacitor connected to the high voltage secondary coil of the other pulse transformer After the negative high voltage pulse voltage is obtained by the parallel circuit, each of these high voltage pulse voltages is supplied to the two electrodes through protective resistors, respectively, and is supplied separately.

  Therefore, this Patent Document 5 has a fundamental problem that a single electrode cannot apply a high-voltage alternating current to a living body, and is compared with a potential treatment by a living body-applied alternating current using a sine wave that changes smoothly. Thus, Patent Document 5 has a fundamental and serious problem that unpleasant feeling such as hot water is likely to remain after electric potential treatment.

  Further, in Patent Document 5, as compared with a single-electrode potential treatment device, a pulse boosting transformer, a diode / smoothing capacitor connected to the high-voltage secondary coil, a Himmeg resistor for bioprotection, an electrode, etc. Since expensive high-voltage electric parts are required twice each, Patent Document 5 has an essential and large problem that it becomes expensive due to poor workability.

Japanese Patent No. 2609574 Japanese Utility Model Publication No. 61-118346 JP 2006-239032 A JP 2009-279024 A JP 2011-24859 A

  An object of the present invention is to efficiently generate a sinusoidal alternating current of about 60 Hz to 200 Hz that is input to a step-up transformer of an alternating potential treatment device.

  In constructing a potential treatment device that applies an alternating high voltage to a living body to perform treatment, two sine half-wave signals that differ from each other by 180 ° in phase obtained from a sine low-frequency signal of about 60 Hz to 200 Hz are separately provided. By switching the positive and negative DC voltages sufficiently larger than the low-frequency signal by the switching elements alternately by the two width-modulated high-frequency pulses that have been subjected to pulse width modulation, the switching elements are alternately switched to each other from the output ends of the elements. ° After obtaining two different positive and negative width modulated amplified pulse outputs, each of these pulse outputs is demodulated in two ways including two choke coils, two free wheeling diodes and a single common capacitor. By demodulating each circuit alternately, two positive and negative demodulated sine half-wave outputs whose phases are 180 ° different from each other are obtained. By alternately supplying the half-wave output to the primary coil of the step-up transformer, the high-voltage sine wave alternating current generated in the transformer secondary coil has a peak value ratio of positive voltage to negative voltage of 1: 3 by a positive voltage bleeder circuit. This was achieved by the fact that the living body applied AC.

  However, as the demodulating circuit, two free wheeling diodes connected in series from the negative voltage side to the positive voltage side are connected between the pulse output terminals of the two positive and negative systems, and between the other ends of these diodes. An interconnecting portion of two series choke coils connected to each other may be connected to the interconnecting portion of each diode through a common single capacitor, and two demodulating circuits having the connecting portion grounded may be used.

  According to the present invention, two systems of sine half-wave signals having a frequency of about 60 Hz to about 200 Hz and having an effective value of about 5 volts and having phases different from each other by 180 ° are obtained by using pulse width modulated waves. Two switching elements, each having a DC positive voltage and a DC negative voltage, each of which is sufficiently larger than the low-frequency signal, for example, about 135 volts, are applied by two width-modulated high-frequency pulses having a high value of about 5 volts. By alternately controlling the switching, the output of the amplitude-modulated pulse of two positive and negative systems with a phase difference of 180 ° from the output end of each element, for example, about 135 volts, can be taken out with a high efficiency of 95% or more. Regardless of where the step-up transformer can always be driven by the demodulated output of each of the above outputs, the running cost as an AC potential treatment device is greatly reduced. Yes, it has a great energy saving effect.

  Further, in the present invention, two demodulated sine half-wave outputs of positive and negative systems whose phases are different from each other by 180 ° at about 60 Hz to 200 Hz can be alternately supplied to the primary coil of the step-up transformer, for example, at an effective value of about 95 to 100 volts. Therefore, when using this step-up transformer in the above frequency range and voltage, use a general silicon steel sheet core material that is compatible with commercial power supply frequency (50 or 60 Hz sine wave) and voltage (effective value is 100 volts). Since the inexpensive step-up transformer can be used as it is, and an expensive silicon steel core material for audio frequencies is not required, the AC potential treatment device according to the present invention has a significant effect of reducing the manufacturing cost.

  Furthermore, the demodulating circuit according to the present invention is configured such that a self-induced current generated at the output end of a choke coil during demodulation operation is alternately shunted to two free wheeling diodes through a common single capacitor, In this way, even when the step-up transformer is bus-driven at a low frequency of about 60 Hz to 200 Hz, the harmful and useless bus -The pumping phenomenon can be reliably prevented, and the power supply voltage fluctuation caused by this phenomenon can be reliably suppressed and removed.

  More specifically, since the single capacitor according to the present invention is grounded together with the interconnections of the diodes, it can form a positive and negative low-pass filter with each choke coil. Self-inductive current energization action that returns the self-inductive current generated in the demodulating coil as described above to the input terminal of the operating coil alternately through each diode alternately as described above Thus, there is also an effect that it can be implemented with good workability and at a lower cost than this type of demodulation circuit using capacitors in parallel with the respective diodes.

  More specifically, during the ON period of each switching element for obtaining the positive and negative two-line width modulated amplified pulse output, the supply to the output side is suppressed while accumulating part of the input voltage in the choke coil. The self-induced current of each coil can be returned from the output side to the input side via the free wheeling diode and a single capacitor during the off period of the element. Operates as a low-pass filter that reduces the square wave of the high-frequency pulse, that is, the AC component, so that the demodulated sine half-wave output of two positive and negative lines that change smoothly can be demodulated at an extremely high efficiency of about 95% or more. Reduced power consumption because it can be supplied alternately to the primary coil of the step-up transformer and high-voltage sine wave AC can be generated in the transformer secondary coil Excellent effect that possible is also obtained exert.

  In the present invention, a positive voltage and a negative voltage equal to an ideal ratio of positive and negative ions in a healthy human body from a sine wave high voltage that smoothly changes at a frequency of about 60 Hz to 200 Hz, for example, a frequency of about 70 to 120 Hz. A living body applied alternating current with a peak value ratio of 1 to 3 can be obtained and this alternating voltage can be applied to the living body. Therefore, regardless of the commercial power supply frequency, the therapeutic effect is always highly effective and quick. In addition to being able to carry out AC potential therapy, there is also an excellent effect that living body rejection reaction can be remarkably reduced.

System circuit diagram showing an example of an AC potential treatment device according to the present invention Operation waveform diagram in the circuit of FIG. Operation waveform diagram in the circuit of FIG.

  Next, an example of an embodiment for carrying out the present invention will be described with reference to the drawings. An AC potential treatment device of the present invention is a potential treatment device that performs treatment by applying an alternating high voltage to a living body. As shown in the system circuit diagram of FIG. 1, the frequency obtained from the sine low frequency generation circuit 1 that operates on a general DC power source DC using a C / R oscillation circuit, a positive feedback oscillation circuit, etc. is about 60 Hz to 200 Hz. A sine low frequency signal having an effective value of about 5 volts is input to the primary coil of the low frequency transformer T1.

  Then, two sine wave voltages having effective values of about 5 volts and phases of 180.degree. That are different from each other by 180.degree. Are generated at both ends A and B of the middle grounded secondary coil in the transformer T1. After obtaining half-wave rectification by diodes d connected in the same direction, two sine half-wave signals having amplitudes of about 7 volts and phases different from each other by 180 ° are obtained as shown in FIG. As shown in FIG. 1, each signal is individually input to each input terminal C / D of the current general pulse width modulation circuit 2 which is operated by the DC power source DC.

  On the other hand, a high-frequency pulse having a repetition frequency of about 100 KHz and an amplitude of about 5 volts obtained from the current general-purpose high-frequency pulse generation circuit 3 operating with the DC power source DC by a triangular wave oscillator having a frequency of about 100 KHz is obtained. By using the pulse width modulation circuit 2 shown in FIG. 1 and performing pulse width modulation separately by the two systems of sine half-wave signals, a substantially comb-like waveform as shown in FIG. Two width-modulated high-frequency pulses having an amplitude of about 5 volts and differing in phase by 180 ° are obtained.

  After that, each pulse is passed through a pulse transformer PT or a common gate drive IC as shown in FIG. 1, and control electrodes such as gates and bases of two switching elements Q1 and Q2 such as power MOS FET and bipolar transistor. Each is supplied separately between EF and the source (emitter). As the gate drive IC, there is an IC FAN 7382N manufactured by Fairchild Inc. in the United States, and these gate drive ICs may be used based on the connection specifications.

  Next, as shown in FIG. 1, two positive and negative DC voltages obtained from the DC power source DC, for example, a DC voltage + V of about plus 130 volts and a DC voltage −V of about minus 130 volts are respectively supplied to the two switching elements Q1. As shown in FIG. 1, the voltage is separately applied to the drain and source (collector and emitter) of Q2.

  Next, the two systems of width-modulated high frequency pulses added separately between the control electrodes E and F and the sources (emitters) of the elements Q1 and Q2 through the pulse transformer PT as shown in FIG. By switching the DC voltage of the positive and negative two systems with the two switching elements Q1 and Q2, the phases of the output terminals G and H such as the sources (emitters) of the elements Q1 and Q2 are different from each other by 180 degrees, A width-modulated amplified pulse output such as GH in FIG. 2 having two positive and negative systems each having a high value of about 130 volts can be generated.

  Further, in demodulating each width-modulated amplified pulse output, two free wheeling diodes D1 connected in series from the negative voltage side switching element Q2 to the positive voltage side switching element Q1 in FIG. D2 is connected to each of the elements Q1 and Q2, and the two choke coils L1 and L2 are connected in series between the other ends G and H of the diodes without being coupled to each other as shown in FIG. I is connected to the interconnecting part d0 of each of the diodes D1 and D2 via a capacitor C, and the positive and negative two-system pulse outputs are respectively output by the positive and negative two-system demodulating circuit 4 constructed by grounding the connecting part d0. Can be demodulated separately.

  As a result, an alternating current is generated at the interconnecting portion I of each of the coils L1 and L2 by a sine wave having an effective value of about 130 volts positive and negative as shown in I of FIG. By supplying the other end of the grounded primary coil t1, a high-voltage sine wave alternating current of about 10 to 15 kilovolts as shown in FIG. 2J can be generated on the hot side J of the transformer secondary coil t2.

  More specifically, as shown in the above connection example, the other ends G and H of two free wheeling diodes D1 and D2 connected in series between the switching elements Q1 and Q2 as shown in FIG. At the time of demodulation operation of the demodulating circuit 4 having two positive and negative paths each having choke coils L1 and L2 which are connected to each other at about 180 μH and are not coupled to each other, and a ceramic capacitor and a titer variable capacitor C of about 0.1 μF, The self-inductive current that is about to flow out from the output side of the coil L1 does not flow in the direction of the coil L2 that is in a pause state, but can be efficiently and reliably returned only to the input end of the coil L1 that is operating. Therefore, there is no adverse effect on the inactive coil L2.

  After that, this time, the other coil L2 starts to demodulate, and the self-induced current that is about to flow out from the output side of the coil L2 flows in the direction of the resting coil L1 by the diode D1 in the reverse direction. In addition, the coils L1 and L2 are efficiently and surely returned to only the input end of the operating coil L2 through the series circuit of the diode D2 and the capacitor C without adversely affecting the inactive coil L1. Since the pulse output of the two positive and negative systems can be demodulated alternately and correctly by the demodulating action of the width-modulated pulse by the original low-pass filter composed of the capacitor C and the capacitor C, the step-up transformer T has a low frequency of about 60 to 200 Hz. When driving on the bus, no harmful and unnecessary “bus pumping phenomenon” occurred, and fluctuations in the power supply voltage were reliably suppressed and eliminated.

  Next, one end of the secondary coil t2 in the step-up transformer T is connected to a common grounding point in the DC power source DC via a grounding high Meg resistor R0 (about 5 MΩ), and is connected to both ends of the secondary coil t2. Is a parallel circuit of a bleeder resistor R1 and a diode d1 with a large high Meg resistor of about 5 to 10 MΩ · 10 W, and a positive voltage bleeder circuit 5 using a bleeder resistor R2 and a diode d2 with a large high Meg resistor in series with this parallel circuit. 2 and a conductive mat in which a biologically applied alternating current with a peak value ratio of a positive voltage and a negative voltage generated as shown by K in FIG. m is supplied through a current limiting high-Meg resistor R3.

  However, the living body applied AC according to the present invention is a high voltage sine wave AC that changes smoothly at a frequency of about 60 Hz to 200 Hz by setting the resistance value ratio of the bleeder resistors R1 and R2 to 2: 1. Since the living body applied AC has a peak value ratio of 1: 3, a living body has a peak value ratio of positive voltage to negative voltage equal to the ideal existence ratio of positive and negative ions in a healthy human body. Since the applied alternating current can be supplied and applied to the conductive mat m via the current limiting Hi-Meg resistor R3 to the living body, regardless of the commercial power supply frequency, the living body applied alternating current always changes smoothly at the above frequency, and the therapeutic effect is always obtained. It was possible to greatly promote the effectiveness and fast-acting property of the medicine, and to reliably prevent the occurrence of a biological rejection reaction.

  Naturally, the AC potential treatment device according to the present invention can also be used as an AC potential treatment device that performs contact heating with respect to the affected part of the living body using a conducting conductor instead of using the conductive mat m.

DESCRIPTION OF SYMBOLS 1 ... Sine low frequency generation circuit C ... Capacitor 2 ... Pulse width modulation circuit Q1 * Q2 ... Switching element 3 ... High frequency pulse generation circuit d * d1 * d2 * D1 / D2 ... Diode 4 ... Demodulation circuit R1-R3 * R0 ... High Meg Resistance 5 ... Positive voltage bleeder circuit T ... Boost transformer T1 ... Low frequency transformer t1 ... Primary coil PT of the boost transformer ... Pulse transformer t2 ... Secondary coil R of the boost transformer ... Gate (base) input resistance m ... Conductive mat L1 L2 ... Choke coil

Claims (2)

  In an electric potential treatment device that performs treatment by applying an alternating high voltage to a living body, two sine half-wave signals that are obtained from sine low-frequency signals having a frequency of about 60 Hz to 200 Hz and that are 180 degrees out of phase with each other. By using two width-modulated high-frequency pulses subjected to pulse width modulation, each positive and negative DC voltage sufficiently larger than that of the low-frequency signal is controlled to be switched alternately by the switching elements. After obtaining two width-modulated amplified pulse outputs that are 180 ° different from each other by 180 °, each of these pulse outputs is output to each of two demodulation circuits each having two choke coils, two diodes, and a common single capacitor. By demodulating the signals alternately, two demodulated sine half-wave outputs with a phase difference of 180 ° from each other are obtained, and these positive and negative sine half-wave outputs are boosted. By alternately supplying to the primary coil of the transformer, the high voltage sine wave alternating current generated in the transformer secondary coil becomes a biologically applied alternating current with a peak value ratio of positive voltage to negative voltage of 1: 3 by a positive voltage bleeder circuit. AC potential therapy device.   In an electric potential treatment device that performs treatment by applying an alternating high voltage to a living body, it is pulsed separately by two sinusoidal half-wave signals obtained from a sinusoidal low-frequency signal having a frequency of about 60 Hz to 200 Hz and having phases different from each other by 180 °. By switching the two switching elements to which a DC positive voltage and a DC negative voltage sufficiently larger than the low-frequency signal are separately applied to each other by two width-modulated high-frequency pulses that are width-modulated, Two series of positive and negative width-modulated amplified pulse outputs whose phases differ from each other by 180 ° are obtained from the output terminals of each element, while two free in series conducting between the output terminals from the negative voltage side to the positive voltage side・ Connecting a wheeling diode, and connecting the two choke coil interconnects connected in series to each other end of the diodes in common In addition, the two phases of the positive and negative pulse outputs are alternately demodulated by the two demodulating circuits connected to each other through the capacitors, and the phases from the interconnecting portions of the coils are mutually different. By obtaining demodulated sine half-wave outputs of two positive and negative systems differing by 180 °, and supplying these positive and negative sine half-wave outputs alternately to the primary coil of one end ground in the step-up transformer, An AC potential treatment device in which a generated high-voltage sine wave AC is converted into a living body-applied AC with a peak value ratio between a positive voltage and a negative voltage of 1: 3 by a positive voltage bleeder circuit.

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