JP3011465U - Microwave therapy - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a microwave therapeutic device capable of finely adjusting the output time, stop time and output power of the microwave pulse to be irradiated. [Structure] The microwave output time of the microwave interrupting means for interrupting the output of the microwave oscillating means is controlled steplessly with a knob 2b from a constant minimum value, and the microwave stop time of the microwave interrupting means is kept constant with the knob 2c. Stepless control from the minimum value of. Further, the knob 2a controls the microwave output power of the microwave oscillating means from a constant minimum value in a stepless manner. This makes it possible to finely adjust the output time, stop time, and output power of the microwave pulse to be applied.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a microwave therapeutic device for irradiating and treating a diseased part with microwaves (electromagnetic waves of about 1 GHz or higher).

[0002]

[Prior art]

 It is well known that the electromagnetic waves in the microwave band have the effect of vibrating water molecules and consequently raising the temperature of water. Many heating appliances that utilize this principle have also been developed and are widely used. In the medical field as well, a large number of testing instruments and treatment instruments using microwaves have been put to practical use. Among them, a microwave treatment device that heat-treats an affected area of an internal organ located in the deep part of the living body such as the stomach by irradiating microwaves may have a relatively simple structure and can be constructed at low cost. Yes, there is much demand.

The microwave therapeutic device as described above irradiates the affected area in the living body with microwaves from outside the body through the skin. At this time, depending on the symptom (content of treatment), it is necessary to irradiate with high-power microwaves, but continuous high-power microwave irradiation cannot avoid an increase in skin surface temperature. As a result, there was a risk of causing injury such as burns, swelling, or blistering. Therefore, a method of irradiating microwaves in a pulsed manner (for example, stopping the oscillation of microwaves is repeated every 1 second) is adopted. By doing so, the temperature of the skin surface, which has a large amount of heat dissipation, does not rise, and only the affected area can be effectively heated.

[0004]

[Problems to be solved by the device]

 By the way, even when the microwave output is intermittent, it is necessary to adjust the microwave output time, stop time, and output power according to the symptom. However, the conventional microwave therapy device has a configuration in which only the duty ratio (ratio between the microwave output time and the intermittent 1-cycle time) can be adjusted when the microwave is output in pulses. However, the output time, stop time, and output power could not be finely adjusted. For this reason, it is not only inconvenient, but there are many cases in which microwaves that exceed the irradiation limit are emitted, which was also a factor that induces the accidents described above.

The present invention has been made under such a background, and provides a microwave treatment device capable of finely adjusting the output time, the stop time, and the output power of the microwave pulse to be irradiated. It is intended to be provided.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a microwave oscillating means for oscillating microwaves and an output power control for continuously controlling the output power of the microwave oscillating means from a constant minimum value. Means, microwave interrupting means for interrupting the output of the microwave oscillating means, output time control means for steplessly controlling the microwave output time of the microwave interrupting means from a constant minimum value, And a stop time control means for controlling the microwave stop time of the microwave interrupting step continuously from a constant minimum value.

[0007]

[Action]

 According to the present invention, the output time control means controls the microwave output time of the microwave interrupting means for interrupting the output of the microwave oscillating means in a stepless manner from a certain minimum value, and the stop time controlling means controls the microwave interrupting means. The microwave stop time is controlled steplessly from a fixed minimum value. Further, the output power control means controls the microwave output power of the microwave oscillating means from a constant minimum value in a stepless manner. This makes it possible to finely adjust the output time, stop time, and output power of the applied microwave pulse.

[0008]

Embodiment An embodiment of the present invention will be described below with reference to the drawings. A. First Embodiment FIG. 1 is an external view showing a structure of an operation panel 1a of a microwave therapeutic device according to a first embodiment of the present invention. Further, FIG. 2 is a block diagram showing an internal configuration of the microwave therapeutic device of the embodiment. In FIG. 1, knobs 2a to 2c are attached to VRs (variable resistors) 3a to 3c, respectively, and are for rotating shafts of VRs 3a to 3c attached thereto.

The knob 2a is for adjusting the microwave output power, and the knobs 2b and 2c are for adjusting the on (that is, microwave output) time and the off (that is, microwave stop) time when the pulse wave is output, respectively. is there. The numbers 1, 2, ..., 8 and 9 around the knobs 2a to 2c are adjustment scales. For example, "1" is 10% of the adjustment range, and "9" is 90% of the adjustment range. Indicates that it is set to the% position. If the knob 2a is in the “ON” position and the knobs 2b and 2c are in the “MIN” position, the microwave output power, the microwave output time, and the microwave stop time are set to constant minimum values. Indicates that Further, if the knobs 2a to 2c are in the position of "MAX", it indicates that the microwave output power, the microwave output time, and the microwave stop time are set to the maximum values, respectively.

The VR 3a is interlocked with the power switch 4 (see FIG. 2), and if the knob 2a is set to the “OFF” position displayed on the operation panel 1a, the power switch 4 is turned off. Become. If the knob 2a is set to the position of "ON" to "MAX", the power switch 4 is turned on.

In the microwave treatment according to this embodiment, first, the setting position of the knob 2a is changed from "OFF" to "ON". At this time, the treatment time is set to 0 and 0 is displayed on the display unit 6a. Next, the switch 5a or 5b provided on the operation panel 1a is pressed to determine the operation time of the timer circuit (see FIG. 2) and set the treatment time. At this time, the set treatment time is displayed on the display unit 6a.

Next, either the switch 7a or the switch 7b is pressed to select whether the microwave output is a continuous wave or a pulse wave. The switches 7a and 7b have LEDs (light emitting diodes) 8a and LEDs 8b (both of which are shown in FIG. 2), respectively. Then, when the switch 7a is pressed, the LED 8a lights up, and when the switch 7b is pressed, the LED 8b blinks.

Further, the knobs 2b and 2c are turned to adjust the combination of the irradiation time of the pulsed microwave and the stop time to a value that matches the therapeutic purpose. After that, the knob 2 is rotated from "ON" to "MAX" to adjust the microwave output power to a value that matches the therapeutic purpose.

As described above, the power switch 4 is turned on by setting the position of the knob 2a (see FIG. 1) between “ON” and “MAX”. As a result, AC 100 V is supplied to the power supply circuit 20, the step-up transformer 22 and the phase control circuit 23 via the SSR (solid state relay) 21. The power supply circuit 20 generates a DC power supply required for the operation of this embodiment from the input AC 100V and supplies it to each unit of the main body.

The SSR 21 is composed of a switching element (for example, a triac), and phase-controls the input AC 100 V according to the gate signal Sg, and as a result, the voltage input to the primary side of the boosting transformer 22. Control V. The voltage generated on the secondary side of the step-up transformer 22 is input to the rectifier circuit 24. The rectifier circuit 24 is composed of two or more rectifier diodes, a charge capacitor, a smoothing capacitor, and the like. As a result, a direct current having a voltage much higher than the input AC (in this embodiment, several hundred to several thousand V depending on the secondary side voltage waveform of the step-up transformer 22) is output. The high voltage DC (anode voltage) Vp output from the rectifier circuit 24 is supplied to the magnetron 25.

The magnetron 25 is an electron tube in which electrodes are arranged in a strong magnetic field and the rotational movement of an electron group generated between the electrodes and cavity resonance are used. More specifically, the magnetron 25 is composed of an anode cylinder in which cavities are radially arranged on the inner peripheral surface, a cathode provided at the center of the anode cylinder, and a magnet for forming a DC strong magnetic field in the axial direction of the anode cylinder. ing. When an anode voltage Vp is applied between this anode and cathode, electrons fly out from the cathode. The orbit of this electron is bent by a strong DC magnetic field and does not easily reach the positive pole. Then, the electrons that fly out of the cathode become a group of electrons and start rotating in the anode cylinder. At this time, the electron group is affected by the resonance of the cavity, and a current according to the resonance flows (that is, oscillates) between the anode and the cathode. The microwave generated in the magnetron 25 in this manner is supplied to the antenna 27 by the power supply line 26.

The phase control circuit 23 inputs 100 V AC and outputs a gate signal G corresponding to the knob 2a (position of VR3a). FIG. 3A shows a waveform of AC 100V. FIG. 3B shows the waveform of the gate signal G when the knob 2a is in the "ON" (minimum output) position. That is, when the knob 2a is in the "ON" position, the gate signal G becomes a gate pulse having the smallest duty ratio for a half cycle of 100 V AC. FIG. 3C shows an output waveform of the SSR 21 at this time. On the other hand, FIG. 3 (d) shows the waveform of the gate signal G when the knob 2a is at the position "MAX", and FIG. 3 (e) shows the output waveform of the SSR 21 at this time. Thus, by turning the knob 2a from the "ON" position to the "MAX" position, the duty ratio of the gate signal G changes from the minimum to the maximum.

The pulse generation circuit 29 outputs the pulse P when the output Q of the FF (flip-flop) 28 input to the terminal INH (inhibit: inhibit) is “L (low level)”, that is, when a pulse wave is output. Output. At this time, the time when the pulse P becomes "H (high level)", that is, the time when the microwave is output is determined by VR3b (the position of the knob 2b) and is "L" (that is, the output stops). ) The time is determined by VR3c (position of knob 2c). When the terminal INH of the pulse generation circuit 29 is "H", the output pulse P is always "H".

The switches 7a and 7b are connected to the S (set) and R (reset) inputs of the FF 28, respectively. Therefore, when the present embodiment is used with a continuous wave, Q of F F28 becomes "H", and when it is used with a pulse wave, it becomes "L". The output Q of the FF 28 is input to the LED 8a and the inverter 31. The output of the inverter 31 and the output pulse P of the pulse generating circuit 29 are input to the AND gate 32, and the output of the AND gate 32 is input to the LED 8b. Therefore, when the microwave output is the continuous wave output, the LED 8a is continuously turned on, and when the microwave output is the pulse wave output, the LED 8b blinks in conjunction with the microwave output.

The timer circuit 33 is composed of an up / down counter section, a driver section that causes the display section 6a to display the number being counted by the up / down counter section, and a clock circuit section. The up / down counter section is counted up by the switch 5b and is counted down by the reference clock signal generated by the switch 5a or the clock circuit section. The timer circuit 33 outputs the Stc signal as "H" when the number indicated by the up / down counter section is other than "0". Further, the number (time) being counted by the up / down counter section is displayed by the display section 6a.

The gate signal G output from the phase control circuit 23, the pulse P output from the pulse generation circuit 29, and the signal Stc output from the timer circuit 33 are ANDed by the AND gate 30. The output Sg is input to the SSR 21. Immediately when the pulse wave is selected as the microwave output while the signal Stc is "H", the gate signal G is interrupted at the duty ratio corresponding to the positions of the knobs 2b and 2c, and the gate signal Sg is obtained. It is input to the SSR 21. When a continuous wave is selected as the microwave output, the gate signal Sg has the same waveform as the gate signal G, and the voltage V input to the step-up transformer 22 is linearly controlled by this gate signal Sg. .

By the way, when the treatment time set in the timer circuit 33 by the switches 5a and 5b elapses, the signal Stc becomes "L" and Sg always becomes "L". Therefore, the output of the microwave is stopped.

In the present embodiment, around the knobs 2a to 2c, the adjustment ranges of the microwave output power, the microwave output time, and the microwave stop time are indicated by numbers from "1" to "9". Although it is shown on a scale, the actual microwave output power value, microwave output time value, and microwave stop time value may be displayed here.

B. Second Embodiment FIG. 4 is an external view showing a configuration of an operation panel 1b of a microwave therapeutic device according to a second embodiment of the present invention. Further, FIG. 5 is a block diagram showing an internal configuration of the microwave therapeutic device of the embodiment. 4 and 5, parts corresponding to those in FIG. 1 or 2 are designated by the same reference numerals, and the description thereof will be omitted. In FIG. 4, 4a and 4b are buttons for turning on / off the power switch 4, and the power switch 4 is turned on by pressing the button 4a, and the power switch 4 is turned off by pressing the button 4b. .

The switches 10 a and 10 b are switches for adjusting the microwave output power, and by pressing the switch 10 a, the microwave output power is sequentially increased to the maximum value that the magnetron 25 can output. Further, by pressing the switch 10b, the microwave output power is sequentially reduced to the minimum value (for example, 0.1) that can be controlled by the phase control circuit 23.

The switches 11a and 11b are switches for adjusting the time during which the microwave is output during one cycle when the pulse wave is output. By pressing the switch 11a, the maximum value (for example, 0.99) can be obtained. ) Until the output time increases. By pressing the switch 11b, the output time is sequentially reduced to the minimum value (for example, 0.01). The switches 12a and 12b are switches for adjusting the time during which the microwave output is stopped during one cycle when outputting a pulse wave. By pressing the switch 12a, the output stop time is sequentially increased to the maximum value. . By pressing the switch 12b, the output stop time is sequentially reduced to the minimum value. That is, these switches 11a, 11b, 12a and 12b determine the repetition cycle and duty ratio of the output pulse wave.

In the microwave treatment according to the present embodiment, first, the button 4a is pressed to turn on the power supply to each part of the main body. Next, either the switch 7a or the switch 7b is pressed to select whether the microwave output is a continuous wave or a pulse wave. When the pulse wave is selected here, the microwave output time is set by pressing the switch 11a or 11b, and the output stop time is set by pressing the switch 12a or 12b.

As shown in FIG. 5, the switches 10 a, 10 b, 11 a, 11 b, 12 a and 12 b are connected to the control unit 50. The control unit 50 outputs a phase control signal Spc to the phase control circuit 23, and outputs to the pulse generation circuit 29 a signal Son for controlling the microwave output time and a signal Soff for controlling the output stop time. Output. Further, the microwave output power, the output time, and the stop time set in the control unit 50 are output to the display unit 6b as necessary. The display portion 6b is composed of a portion showing a numeral, a portion showing a unit, and a portion showing a display mode. Then, for example, when the switch 11a or 11b is pressed, a lamp indicating time such as "ON" or "sec." Lights up and the set microwave output time is displayed. Further, when the switch 12a or 12b is pressed, a lamp indicating a time such as "OFF" or "sec." Lights up and the set output stop time is displayed.

When the microwave treatment device of the present embodiment is turned on, the control unit 50 sets the treatment time to 0 and the microwave output power to the minimum value. Therefore, the switch 5a or 5b is pressed to determine the operating time of the timer circuit, and the switch 10a or 10b is pressed to set the microwave output power. At this time, when the switch 5a or 5b is pressed, a lamp representing time such as "TIME" or "min." Lights on the display portion 6b, and the set treatment time is displayed. When the switch 10a or 10b is pressed, a lamp indicating the output power such as "LEVEL" or "WATT" is lit on the display unit 6b, and the set microwave output power is displayed.

In the present embodiment, the duty ratio of the gate signal G output by the phase control circuit 23 is controlled by the phase control signal Spc, and the pulses P output by the pulse generation circuit are set to “H” by the signals Son and Soff. The "time" and the "L" time are controlled. In this way, the microwave of the output power, the output time and the stop time set by the switches 10a, 10b, 11a, 11b, 12a and 12b is output, and the treatment set by the switches 5a, 5b in the timer circuit 33. Over time, the microwave output will stop.

As described above, according to the microwave therapeutic device of the present invention, the output time, stop time and output power of the microwave pulse to be applied can be finely adjusted.

It should be noted that the above-mentioned minimum and maximum values are merely examples, and these can be displayed on the display unit 6b and are determined by the characteristics of the magnetron 25, the phase control circuit 23, or the control unit 50. Is set to the value that is set.

[0033]

[Effect of device]

 As described above, according to the present invention, the output time control means controls the microwave output time of the microwave interrupting means for interrupting the output of the microwave oscillating means, and the stop time controlling means controls the microwave output of the microwave interrupting means. Control the wave stop time. The output power control means controls the microwave output power of the microwave oscillating means. This makes it possible to finely adjust the output time, the stop time, and the output power of the microwave pulse to be applied, so that medical accidents can be prevented.

[Brief description of drawings]

FIG. 1 is an operation panel 1a according to a first embodiment of the present invention.
It is a front view showing an example of the composition of.

FIG. 2 is a block diagram showing an example of an internal configuration of the embodiment.

FIG. 3 is a diagram showing an example of a waveform of each part in the embodiment.

FIG. 4 is an operation panel 1b according to a second embodiment of the present invention.
It is a front view showing an example of the composition of.

FIG. 5 is a block diagram showing an example of an internal configuration of the same embodiment.

[Explanation of symbols]

 2a, 2b, 2c knobs 3a, 3b, 3c VR 6a, 6b display section 10a, 10b switch 11a, 11b switch 12a, 12b switch 21 SSR 23 phase control circuit 25 magnetron 29 pulse generation circuit 50 control section

Claims (1)

[Scope of utility model registration request] 1. A microwave oscillating means for oscillating a microwave, an output power control means for steplessly controlling an output power of the microwave oscillating means from a constant minimum value, and an output of the microwave oscillating means. Microwave interrupting means for interrupting, output time control means for controlling the microwave output time of the microwave interrupting means steplessly from a constant minimum value, a constant microwave stop time of the microwave interrupting means And a stop time control means for controlling steplessly from a minimum value.