JP3011463U - Microwave therapy - Google Patents

Abstract

(57) [Summary] [Purpose] An object of the present invention is to provide a microwave therapeutic device capable of accurately confirming the microwave irradiation state without any error. [Structure] When continuous wave output is selected by the switch 7a, the phase control circuit 15 causes the magnetron 18 to operate.
The microwave output power is controlled and the microwave output power is displayed by the bar graph 9. Further, when the pulse wave output is selected by the switch 7b, the pulse output circuit 21 controls the microwave output duty ratio of the magnetron 18, and the bar graph 9 displays the microwave output duty ratio. Further, the LED 8a emits light when the continuous wave output is selected by the switch 7a, and the LED 8b is turned on when the pulse wave output is selected by the switch 7b in association with the oscillation and stop of the microwave by the magnetron 18. It goes off and on repeatedly.

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 approximately 1 GHz or more), and more particularly to a microwave therapeutic device capable of easily confirming a microwave irradiation state.

[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.

[0003]

[Problems to be solved by the device]

 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.

By the way, even when the microwave output is a pulse wave, it is necessary to adjust the duty ratio (ratio between the microwave output time and one pulse period time) according to the symptom. In addition, the conventional microwave therapeutic device has a mode changeover switch so that a continuous microwave output can be obtained as needed. However, in the above-described conventional microwave therapeutic device, the mode changeover switch, the microwave power adjustment knob, and the microwave duty ratio adjustment knob are arranged on the operation panel. Therefore, the confirmation of the microwave output status (continuous wave or pulse wave, and duty ratio) should be done by checking the status of the mode switch described above or the numerical value written on the outer circumference of each adjustment knob. There was no other way than referring to. For this reason, it is not only inconvenient, but when the above microwave therapeutic device is used for an analgesic patient, it is extremely difficult for the patient to detect the microwave irradiation state based on the sensible temperature. It was also a factor in inducing an accident.

The present invention has been made under such a background, and an object thereof is to provide a microwave therapeutic device capable of accurately confirming a microwave irradiation state without any error.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the invention according to claim 1, microwave oscillating means for oscillating a microwave, and microwave output power control means for controlling the output power of the microwave are provided. A microwave output connecting / disconnecting means for making the output of the microwave a pulse wave, an output selecting means for selecting whether the output of the microwave is a continuous wave or a pulse wave, and a continuous wave by the output selecting means. It is characterized by comprising an output display means for displaying the microwave power when the pulse wave is selected and the duty ratio of the pulse when the pulse wave is selected.

Further, in the device according to the second aspect, the microwave therapeutic device according to the first aspect includes a first light emission notification unit that emits light when a continuous wave is selected by the output selection unit. And a second light emission notifying unit which emits light when a pulse wave is selected by the output selecting unit.

Further, in the invention according to claim 3, in the microwave therapeutic device according to claim 2, the second light emission notifying means is interlocked with oscillation and stop of the microwave. It is characterized by repeating turning on and off.

[0009]

[Action]

 According to this invention, when the continuous wave output is selected by the output selection means, the microwave output power control means controls the microwave output power of the microwave oscillation means, and the output display means controls the microwave output power. Is displayed. Further, when the pulse wave output is selected by the output selection means, the microwave output duty ratio of the microwave oscillation means is controlled by the microwave interrupting means, and the microwave output duty ratio is displayed by the output display means. To do. Further, the first light emission notifying means emits light when the continuous wave output is selected by the output selection means, and the second light emission notifying means generates microwave oscillation when the pulse wave output is selected by the output selection means. The light is turned on and off repeatedly in conjunction with the oscillation and stop of the microwave by the means. Thereby, the microwave irradiation state can be easily confirmed.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. A. Configuration of Operation Unit FIG. 1 is an external view showing a configuration of an operation panel 1 of a microwave therapeutic device according to an 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, a knob 2 is attached to a VR (variable resistor) 3 and is for turning a shaft of the VR 3. Further, the VR 3 is interlocked with the power switches 4 and 4 (see FIG. 2), and if the knob 2 is set to the “OFF” position displayed on the operation panel 1, the power switch 4 is turned off. . If the knob 2 is set to the position of "ON" to "MAX", the power switches 4 and 4 are turned on.

In the microwave treatment according to this embodiment, first, the setting position of the knob 2 is changed from “OFF” to “ON”. After that, the timer setting switch 5a or 5b provided on the operation panel 1 is pressed to determine the operation time of the built-in timer circuit (not shown) and set the treatment time. At this time, the set treatment time is displayed on the display unit 6.

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.

After that, the position of the knob 2 is set between “ON” and “MAX”, and the microwave output state is adjusted to the desired position. At this time, the microwave output power (at the time of continuous wave output) or the duty ratio of the microwave output (at the time of pulse wave output) is displayed on the bar graph 9. The bar graph 9 has a plurality of LEDs 10, 10 ... (See FIG. 2) vertically arranged inside the bar graph 9, and the numerical value is large or small depending on the number of lit LEDs 10, 10 ,. Is shown.

B. Internal Configuration As described above, the power switches 4 and 4 are turned on by setting the position of the knob 2 (see FIG. 1) from “ON” to “MAX”. As a result, 100 V AC is supplied to the booster transformer 13, the heater transformer 14, and the phase control circuit 15 via the power supply circuit 11, the SSR (solid state relay) 12. The power supply circuit 11 generates a direct current power source necessary for the operation of this embodiment from the input alternating current of 100 V and supplies it to each part of the main body.

The SSR 12 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, a voltage input to the primary side of the boosting transformer 13. Control V. The voltage generated on the secondary side of the step-up transformer 13 is input to the voltage doubler rectifier circuit 16. The voltage doubler rectifier circuit 16 is composed of two or more rectifier diodes, a charge capacitor, and a smoothing capacitor. As a result, a direct current having a voltage much higher than the input alternating current (in the present embodiment, several hundred to several thousands V depending on the secondary side voltage waveform of the step-up transformer 13) is output. The high-voltage DC (anode voltage) Vp output from the voltage doubler rectifier circuit 16 is supplied to a magnetron (described later) 18 via a current detection resistor R. Further, the heater transformer 14 steps down the input AC 100V to an appropriate voltage. The heater voltage Vh stepped down by the heater transformer 14 is supplied to the magnetron 18 via the choke coils 17, 17.

The magnetron 18 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 18 is composed of an anode cylinder in which cavities are radially arranged on the inner peripheral surface, a cathode provided in 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 18 in this way is supplied to the antenna 20 by the feeder line 19.

The aforementioned switches 7 a and 7 b are connected to the S (set) and R (reset) inputs of an FF (flip-flop) 22, respectively. Therefore, Q of the FF 22 becomes "H (high level)" when this embodiment is used for continuous wave, and "L (low level)" when it is used for pulse wave. Further, VR3 is composed of VR3a, VR3b and VR3c, and these VR3a to 3b are interlocked and rotated by the knob 2. The VR 3a outputs a voltage Vd obtained by dividing the DC power supply supplied from the power supply circuit 11 according to the position of the knob 2. The VR 3b is connected to the phase control circuit 15, and the VR 3c is connected to the pulse generation circuit 21.

The pulse generation circuit 21 responds to the position of the knob 2 when the output Q of the FF 22 input to the terminal INH (inhibit: prohibited) is “L” (that is, when outputting a continuous wave). A pulse P having a different duty ratio is output. In the present embodiment, when the knob 2 is at the "ON" position, the duty ratio of the pulse P is about 10% (that is, about 10% of one cycle of the pulse P is "H", and the others are "H"). L ″). The duty ratio of the pulse P is increased by gradually turning the knob 2 in the “MAX” direction. When the knob 2 is at the “MAX” position, the duty ratio of the pulse P is about 90%. Become. The repetition period of the pulse P is about 1 second regardless of the position of the knob 2. By the way, when the terminal INH is "H", the output pulse P is always "H".

The phase control circuit 15 inputs 100 V AC and outputs a gate signal G corresponding to the position of the knob 2 and the output Q of the FF 22. Fig. 3 (a) shows the waveform of AC 100V. FIG. 3B shows the waveform of the gate signal G when the output Q of the FF 22 is "H" (during continuous wave output) and the knob 2 is in the "ON" (minimum output) position. That is, when the knob 2 is at 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 the output waveform of the SSR 12 at this time. On the other hand, FIG. 3D shows the waveform of the gate signal G when the output Q of the FF 22 is “H” and the knob 2 is at the “MAX” position, and FIG. 3E shows the waveform of the SSR 12 at this time. It is an output waveform. In this way, by turning the knob 2 from the "ON" position to the "MAX" position, the duty ratio of the gate signal G changes from the minimum to the maximum. FIG. 3F shows the case where the output Q of the FF 22 is “L” (pulse wave output), and the gate signal G becomes “H” regardless of the position of the knob 2.

The gate signal G output from the phase control circuit 15 and the pulse P output from the pulse generation circuit 21 are logically ANDed by the AND gate 23, and the output S g is input to the SSR 12. . That is, when the microwave output is a pulse wave, the waveform of the gate signal G is as shown in FIG. 3 (f), and the gate signal G is interrupted at the duty ratio corresponding to the position of the knob 2. The gate signal Sg is input to the SSR 12. When the microwave output is a continuous wave, the gate signal Sg has the same waveform as the gate signal G, and the voltage V input to the step-up transformer 13 is linearly controlled by this gate signal Sg.

Next, the output Q of the FF 22 drives the relay 24. The common contact point 24c of the relay 24 is connected to the contact point 24b when the output Q of the FF 22 is "H" (continuous wave output), and is connected to the contact point 24a when it is "L" (pulse wave output). The above-mentioned voltage Vd is input to the contact 24a, and the voltage Vp 'indicating the anode current supplied to the magnetron 18 is input to the contact 24b. The common terminal 24c is connected to the LED drive circuit 25.

The LED drive circuit 25 is a circuit configured by a reference voltage generation unit, a voltage comparison element, a current amplification unit, etc., and drives the above-described LEDs 10, 10, ... The LEDs 10, 10 ... That is, the bar graph 9 (see FIG. 1) incorporating the LEDs 10, 10 ... In the case of the pulse wave output (the output Q of the FF 22 is “L”), the number of LEDs 10 corresponding to the position of the knob 2 is 10 ... lights up. As a result, the bar graph 9 shows the duty ratio of the microwave output. When the continuous wave output (the output Q of the FF 22 is “H”), the anode current of the magnetron 18 (that is, the microwave output power) is displayed.

The output Q of the FF 22 is input to the LED 8 a and the inverter 26. The output of the inverter 26 and the output pulse P of the pulse generating circuit 21 are input to the AND gate 27, and the output of the AND gate 27 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.

As described above, in the present embodiment, the microwave output voltage or the microwave output duty ratio set by the position of the knob 2 can be easily adjusted according to the number of LE Ds 10, 10 ... Can be read by On the other hand, by observing whether the LED 8a is lit or the LED 8b is blinking, it is possible to simply confirm whether the microwave output is continuous output or pulse output. Further, since the LED 8b blinks in conjunction with the microwave output, the duty ratio of the microwave pulse output can be simply confirmed.

In the present embodiment, the period of the pulse P generated in the pulse generation circuit 6 is set to about 1 second, but this period is determined by the output power and frequency of the microwave, or the condition of the patient or affected area. However, the values are not limited to the values shown in this embodiment.

[0026]

[Effect of device]

 As described above, according to the microwave therapeutic device of the present invention, it is possible to easily read the microwave output power during continuous output and the microwave output duty ratio during pulse wave output. Further, since the second light emission notifying means blinks in synchronization with the microwave output, it is possible to visually and simply confirm the oscillation and stop state of the microwave. As a result, it is possible to prevent medical accidents caused by erroneous irradiation of microwaves or excessive irradiation.

[Brief description of drawings]

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

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.

[Explanation of symbols]

 3, 3a, 3b, 3c VR 7a, 7b Switch 8a, 8b LED 9 Bar graph 10 LED 15 Phase control circuit 18 Magnetron 21 Pulse generation circuit 22 FF 24 Relay 25 LED drive circuit R Current detection resistor

Claims (3)

[Scope of utility model registration request] 1. A microwave oscillating means for oscillating a microwave, a microwave output power control means for controlling the output power of the microwave, and a microwave output interrupting means for making the output of the microwave a pulse wave. Output selection means for selecting whether the output of the microwave is a continuous wave or a pulse wave, and microwave power when the continuous wave is selected by the output selection means, and when the pulse wave is selected An microwave display device, comprising: an output display unit that displays a duty ratio of a pulse. 2. A first light emission notifying unit that emits light when a continuous wave is selected by the output selecting unit, and a second light emission notifying unit that emits light when a pulse wave is selected by the output selecting unit. The microwave therapeutic device according to claim 1, wherein: 3. The microwave therapeutic device according to claim 2, wherein the second light emission notifying unit repeatedly turns on and off in association with oscillation and stop of the microwave.