JPH0341722Y2 - - Google Patents

Description

[Detailed explanation of the idea] Industrial applications The present invention relates to improvements in microwave therapy equipment.

Prior Art Utility Model Application Publication No. 184555/1984 is disclosed as a prior art. The content is a device in which a radiator is rotatably attached to the outside of a main body housing a magnetron, etc., and the main body is supported by a sliding part that is slidably fitted onto an erected support. be.

Problems to be Solved by the Invention In the device of Utility Model Application No. 184555/1984, which is presented as a conventional technique, microwaves are emitted over the entire length of the metal tube of the radiator of the device, so it cannot be used in narrow areas. When attempting to irradiate microwaves on the body, the microwaves will be irradiated over a wide range of areas that are not needed, resulting in wasted power consumption. A further drawback is that there is a risk of causing burns.

Means for Solving the Problems The present invention solves the problems of the conventional technology described above. By arbitrarily changing the radiation pattern of microwaves, it is possible to selectively heat the treatment area and safely. Another object of the present invention is to provide a microwave treatment device using a slit antenna that can effectively perform thermal treatment and save energy.

That is, in the present invention, a slit antenna 4 coupled to the magnetron 7 is protruded from the outer wall of a housing 3 which has a magnetron 7 inside and is supported by a support part 2. This is a microwave treatment device using a slit antenna 4 characterized in that a movable door 12 for opening and closing the slit 8 is installed in sliding contact with the slit surface 13 formed by opening the slit 8.

In addition, the casing 3 can be secured by the upright support 21 existing in the support section 2.
is supported.

In addition, a transmission slit 10 is opened in the movable door 12 at a position overlapping with the slit 8, and a plurality of transmission slits 10 among these transmission slits 10 are made into widened slits 11 by opening the slit further widened. It is.

Embodiment The present invention includes a main body 1 in which microwaves are generated;
It consists of a support part 2 that supports a main body part 1. The main body 1 consists of a casing 3 and a slit antenna 4 protruding from the outer wall of the casing 3.

Inside the housing 3 is a power supply unit 5 that generates a DC high voltage.
, a control section 6 that controls the power supply section 5, and a magnetron 7 that generates microwaves by applying a DC high voltage. A slit antenna 4 protruding from the outer wall of the casing 3 has its base end coupled to a magnetron 7 and is rotatably protruded from the casing 3.
The coupling part is a pivot joint that can keep the transmitted power constant.

The detailed configuration of the slit antenna 4 includes a rectangular waveguide 9 whose base end is connected to the magnetron 7 in the housing 3, whose tip is closed and has a plurality of slits 8 opened on one side wall, and a rectangular waveguide 9 with a plurality of slits 8 opened on one side wall. It has a movable door 12 having transmission slits 10 opened at the same positions as the plurality of slits 8 in contact with each other, and widened slits 11 formed by widening the plurality of transmission slits 10. Furthermore, the slit surface 1 with the slit 8 opened
3, a reflecting plate 14a and a reflecting plate 14b extending from the tip and the base of the rectangular waveguide 9, respectively,
A case 15 that covers the rectangular waveguide 9, the reflector 14a, and the reflector 14b from the back of the slit antenna 4 toward the front on the slit surface 13 side, a cover 16 that covers the front of the slit antenna 4, and a base end. is fixed to the movable door 12 and has a reflective plate 14 and a cover 16 at its tip.
The operating rod 17 extends through the slit antenna 4 and protrudes to the outside of the slit antenna 4. The base end of the rectangular waveguide 9 coupled to the magnetron 7 described above is connected to the housing 3.
It is rotatably attached by a rotation mechanism 18 provided in the.

The support part 2 includes a leg frame 20 with a caster 19 attached to the lower surface, a column 21 erected on the leg frame 20, and a hook 22 externally fitted on the column 21 so as to be able to move up and down.
Lifting mechanism 2 that suspends and holds the hanging tool 22 such that it can be raised and lowered freely
3, and a lifting mechanism 2 provided at the upper end of the support column 21.
3, and the housing 3 is attached to the hook 22.

The elevating mechanism 23 includes a chain 25 that hangs and holds the latching tool 22, a reducer 26 and a motor 27 that hoist and lower the chain 25, and is connected to the shaft of the reducer 26 and adjusts the height position of the latching tool 22. It consists of a position detector 28 for detection and an alternating inversion circuit 29 that alternately inverts the polarity of the commercial power supply applied to the motor 27.

The alternating reversal circuit 29 of the elevating mechanism 23 includes an elevating operation panel 24 that is attached to the upper part of the support column 21 and has an operating member for commanding elevating and lowering, that is, an upper limit position setting device 30, a lower limit position setting device 31, and a start switch 32. An upper limit comparator 34 that compares the voltage obtained from the upper limit position setter 30 which determines the upper limit position of the latch 22 with the voltage obtained from the position detector 28, and a voltage obtained from the lower limit position setter 31 which determines the lower limit position and a position detector. a lower limit comparator 35 that compares the voltage obtained from the upper limit comparator 34 and the lower limit comparator 35, and a polarity switch 33 that switches the polarity of the applied power to reverse the rotation direction of the motor 27 by obtaining signals from the upper limit comparator 34 and the lower limit comparator 35.
and a start switch 32 that applies commercial power 36 to the polarity switch 33.

In addition, a movable door 12 provided to close the slit 8
The shape of is not limited to the above-described structure in which the transparent slit 10 and the widened slit 11 are provided in the plate body, but the transparent slit 10 and the widened slit 11
A simple flat plate without an opening may be used as the movable door 12, and the slit 8 at the end position may be closed sequentially.

Effect: Direct current high voltage generated by the power supply unit 5 of the present invention is applied to the magnetron 7 to generate microwaves.
The microwave is radiated from the front of the slit antenna 4. Heat treatment is performed by irradiating the human body with radiated microwaves.

The housing 3 to which the slit antenna 4 for radiating microwaves is attached is continuously and repeatedly raised and lowered by the lifting mechanism 23, or moved to an appropriate height and fixed.

During thermal treatment, if it is desired to irradiate microwaves to a wide area such as the waist of a human body sitting on a chair (not shown), the slits 8 are all opened and the microwaves are radiated from the front of the slit antenna 4.
Furthermore, if the elevating mechanism 23 is driven to continuously and repeatedly move the slit antenna 4 up and down, the irradiation area can be further expanded.

Conversely, if you want to irradiate microwaves to narrow areas such as the wrist, pull the operating rod 17 by hand and open the movable door 12.
Shift slightly. When the movable door 12 is slightly shifted, the slit 8 and the transmission slit 10 are no longer overlapped, and the slit 8 is closed by the movable door 12. Furthermore, even if the movable door 12 moves slightly in the slit 8 where the widening slits 11 overlap, the opening of the slit 8 will not be blocked because the widening slit 11 has a wide slit opening width.
In the embodiment, only three of the seven slits 8 located in the middle are opened, and microwaves are concentratedly radiated from the center of the front surface of the slit antenna 4.
When microwaves are concentratedly radiated from the center in this way, the energy of the microwaves increases, so the control unit 6
Operate to reduce the current flowing to magnetron 7 and suppress the increase in microwave radiant energy. This operation of the control unit 6 reduces the power consumption of the device.

Next, when changing the treatment area from a wide area to a narrow area, the number of opening slits 8 is reduced by operating the movable door 12 so that unnecessary slits 8 are closed and only necessary slits 8 are left open. However, we will explain why the power consumption of the device can be reduced.

The magnetron 7 outputs a selectively set predetermined amount of microwaves.

The magnetron 7 and the slit antenna 4 are matched, and all the microwaves output from the magnetron 7 are radiated toward the treatment site as traveling waves from the slit 8 which is in an open state.

It should be noted that some of the reflected waves do not radiate from the slit 8 but travel backwards and turn into thermal energy, but these are minute amounts and will be ignored.

Initially, when treating a wide area, all slits 8 are opened. A predetermined amount of microwaves outputted from the magnetron 7 is divided in power approximately equally to each slit and poured into each opening slit 8, from which it is radiated over a wide range toward the treatment site.

Next, in an attempt to treat a narrow area, use the operating lever 1.
7 by hand and slightly shift the movable door 12, only a small number of slits 8 at the center of the front of the slit antenna 4 are continuously opened, and the slits 8 on both sides of the front of the slit antenna 4 are closed. 8. Reduce the number of openings.

Then, the predetermined amount of microwaves output from the magnetron 7 is concentrated into the small number of continuous aperture slits 8, and the power is evenly divided and poured into the slits 8. The microwaves are radiated from each opening slit 8 to a narrow treatment area with high efficiency.

If we take a single slit 8 and reduce the numerical aperture of the slit 8 on the slit antenna 4 from a large number to a small number, the slit 8, which was previously open but has been closed, will now emit micro- As the wave power moves towards the opening slit 8,
Microwave power is concentrated and poured into the opening slit 8, and the amount of microwave power radiated from one opening slit 8 increases.

Therefore, in order to maintain the amount of microwave power emitted from the slit 8 at a constant energy level that is optimal for treatment before and after reducing the number of openings of the slit 8, the magnetron 7 and reduce the microwave energy to maintain a constant energy level.

The above reduction can be achieved by operating the control unit 6 and
This is done by reducing the power supplied to the device, and this control operation reduces the power consumption of the device.

In other words, the present invention makes it possible to close unnecessary slits 8 when changing the treatment area from a wide area to a narrow area. When the slit 8 is closed, the microwaves that have been poured into the slit 8 move toward the continuously open slit 8.

Microwave power is concentrated in the continuous opening slit 8, and the microwave power of the slit 8 increases, but in order to adjust this increased microwave power to the current power level that is optimal for treatment, The setting allows the microwave to be powered down, and this power down reduces the power consumption of the device.

When irradiating microwaves to the lower back of a patient lying down on a bed (not shown), the slit antenna 4 is rotated from the rotating mechanism 18 to change and adjust the radiation direction of the microwaves to target the desired area. irradiate. The rotation mechanism 18 provides convenience in use.

Effects of the invention In this invention, slits are arranged in a row on the front side of a rectangular waveguide, a movable door is provided that slides on the slit surface, and several slits in the slit row are opened at all times by sliding of the movable door. Since the slits are configured to open and close, if the area to be irradiated with microwaves is narrow, multiple slits are closed and the microwave power is concentrated in a small number of slits, narrowing the microwave radiation pattern. It can be used as Therefore, it was possible to effectively irradiate microwaves according to the desired irradiation area of the treatment site, thereby increasing the effectiveness of thermotherapy.

Furthermore, when irradiating microwaves to narrow areas of the human body, by concentrating the radiation on a small number of slits, unnecessary microwave irradiation is eliminated, the risk of burns is reduced, and the safety of the device is increased. When unnecessary radiation is eliminated and unnecessary slits are closed to reduce the number of open slits, microwave power is concentrated in the remaining open slits. This concentration of microwave power increases the intensity of the microwaves emitted from each slit toward the treatment area.

In actual treatment, increased microwave power is unnecessary and undesirable for treatment.
Since the microwave power output by the magnetron can be lowered by resetting the control unit, the power consumption of the device can be reduced by the same amount.

[Brief explanation of the drawing]

The attached drawings show an embodiment of the present invention, in which Fig. 1 is a sectional view of the slit antenna, Fig. 2 is a perspective view of the slit antenna with the antenna cover removed,
3 is an overall front view, FIG. 4 is a plan view of the inside, and FIG. 5 is a block diagram of the alternating inversion circuit. 2... Support part, 3... Housing, 4... Slit antenna, 7... Magnetron, 8... Slit,
12...Movable door, 13...Slit surface, 21...
Prop.

Claims (1)

[Claims for Utility Model Registration] (1) A slit antenna 4 coupled to the magnetron 7 is protruded from the outer wall of the casing 3 which has a magnetron 7 inside and is supported by the support part 2. A movable door 12 for opening and closing the slit 8 is installed in sliding contact with the slit surface 13 formed by the slit 8 of the antenna 4, and the movable door 12 opens or closes a plurality of slits 8 as appropriate. A microwave treatment device using a slit antenna characterized by: (2) A microwave treatment device using a slit antenna according to claim 1, wherein the casing 3 is supported by an erected column 21 in the support portion 2. (3) A transmission slit 10 is opened in the movable door 12 at a position overlapping with the slit 8, and a plurality of transmission slits 10 among these transmission slits 10 are made into widened slits 11 which are the slits further widened. A microwave treatment device using a slit antenna according to claim 1, characterized in that: