JP2020025631A - Microwave therapy device - Google Patents

Abstract

To optimize its operability in a semiconductor control-based microwave therapy device having a semiconductor control circuit for supplying microwave and an antenna unit in the same housing.SOLUTION: A microwave therapy device includes an operation unit 2 having a semiconductor control element 13 for supplying microwave, a cooling fin 11 and a cooling fan 12 for cooling the semiconductor control element 13, and an antenna unit 10 in the same housing. The microwave therapy device is configured as follows: the cooling fin 11 is disposed near a suction inlet 21 or a waste heat opening 22 from a housing center 14 in the housing; a mounting arm 3 for movably arranging the operation unit 2 to a body part 1 is disposed near to the side of the cooling fin 11 from the housing center 14; and thereby a distance between the gravity center of the operation unit 2 and a first rotating shaft 15 and a second rotating shaft 16 is brought close.SELECTED DRAWING: Figure 1

Description

The present invention relates to a microwave therapy device.

In a conventional microwave therapy device, a magnetron which is a kind of vacuum tube is used as a microwave generation source. In the method using a magnetron (magnetron method), since the weight of the magnetron increases, it cannot be mounted on the same housing as the antenna, as shown in Patent Document 1, and the magnetron is installed in a main body separate from the antenna. I had to do it.

On the other hand, based on recent advances in semiconductor technology, a semiconductor control system that performs microwave therapy by a semiconductor control circuit using a semiconductor control element as a microwave generation source is conceivable. In the semiconductor control method, the semiconductor control circuit, which is a microwave generation source, can be significantly reduced in size as compared with the magnetron method, so that the antenna and the semiconductor control circuit can be arranged in the same housing.

By arranging the antenna and the semiconductor control circuit in the same housing, the semiconductor control method eliminates the need for a thick coaxial cable that is necessary for the magnetron method and transmits microwaves supplied from the magnetron arranged on the main body to the antenna. In addition, it is possible to prevent a failure due to abnormal heat generated in the coaxial cable.

JP-A-09-239040

However, in the case of a microwave therapy device, it is common to perform the treatment by moving the antenna to the vicinity of the affected part of the patient during the treatment, but in the semiconductor control method, the antenna and the semiconductor control circuit are arranged in the same housing. By doing so, the weight of the housing itself (the operation unit) increases. Furthermore, since the semiconductor control element of the semiconductor control circuit generates heat due to its switching operation, it is necessary to attach cooling fins and dissipate heat. There was a possibility that it would lead to sex deterioration.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to optimize the operability of a microwave treatment device of a semiconductor control system in which an antenna and a semiconductor control circuit are arranged in the same housing.

In order to solve the above problems, a microwave therapy device of the present invention includes a semiconductor control element for supplying a microwave, a cooling fin and a cooling fan for cooling the semiconductor control element, and An operation unit having an antenna unit for supplying the same to the housing, an intake port or a heat exhaust port on a part of the housing surface of the housing, and the cooling fins inside the housing. A mounting arm for arranging the housing movably in the main body from the center of the housing toward the cooling fin side from the center of the housing. They are arranged close together.

According to the microwave therapy apparatus according to the present invention, even when the antenna and the semiconductor control circuit that is the microwave supply unit are arranged in the same housing, regardless of the increase in the weight, the operation unit is optimized, It is possible to operate smoothly.

Schematic diagram of the microwave therapy device operation unit according to the first embodiment of the present invention FIG. 1 is a block diagram illustrating a schematic configuration of a microwave therapy device according to a first embodiment of the present invention. The figure which showed the 1st rotation axis and the 2nd rotation axis of the operation part of this invention. Schematic view of a microwave therapy device operating unit according to the second embodiment or Example 2 of the present invention Schematic view of a microwave therapy device operation unit according to the third embodiment or Example 3 of the present invention. Schematic view of a microwave therapy device operation unit according to the third embodiment or Example 3 of the present invention. 1 is a schematic view of a microwave therapy device operation unit according to a first embodiment of the present invention. FIG. 4 is a diagram illustrating a positional relationship between a center of gravity of an operation unit and a first rotation axis according to the first embodiment of the present invention. Schematic view of a microwave therapy device operation unit according to Embodiment 2 of the present invention Schematic view of a microwave therapy device operation unit according to Embodiment 2 of the present invention Schematic view of a microwave therapy device operation unit according to Embodiment 2 of the present invention Schematic view of a microwave therapy device operation unit according to Embodiment 2 of the present invention FIG. 3 is a schematic view of a microwave therapy device operation unit according to a third embodiment of the present invention. FIG. 3 is a schematic view of a microwave therapy device operation unit according to a third embodiment of the present invention.

(1st Embodiment)
Hereinafter, a first embodiment according to the present invention will be described with reference to FIGS. The microwave therapy device according to the first embodiment includes a main body 1 and an operation section 2 movably connected to the main body 1 via a mounting arm 3. The main unit 1 and the operation unit 2 are electrically connected by an electric signal line 4.

The main unit 1 includes a power supply unit 5 for supplying power to each unit of the device, an input unit 6 for inputting a treatment condition including a microwave output value and a treatment time, a display unit 7 for displaying a set value and a treatment state, The control unit 8 controls the entire apparatus, such as an instruction to execute a treatment condition input from the input unit 6 and a display on the display unit 7. Power supply power from the power supply unit 5, output control signals from the control unit 8, and the like are transmitted from the main unit 1 to the operation unit 2 via the electric signal line 4. Further, unlike the conventional magnetron method, since the microwave generation source (magnetron) is not arranged in the main body 1, the main body 1 can be reduced in weight and size.

The operation unit 2 includes a semiconductor control circuit 9 for supplying microwaves, an antenna unit 10 for supplying microwaves to a patient, a cooling fin 11 for cooling the semiconductor control circuit 9, and a cooling fan 12 (exhaust type). Are provided in the same housing. An intake port 21 is provided on a part of the housing surface of the housing, and a heat exhaust port 22 is provided on the housing surface opposite to the housing surface on which the air inlet 21 is provided and the housing center 14.

The semiconductor control circuit 9 has a semiconductor control element 13 as an amplification element. As the semiconductor control element 13, Si (silicon), GaAs (gallium arsenide), or GaN (gallium nitride) can be used. The microwave is amplified by the semiconductor switching of the semiconductor control element 13, supplied to the antenna unit 10, and supplied from the antenna unit 10 to the affected part of the patient. During the supply of microwaves, switching loss occurs due to semiconductor switching of the semiconductor control element 13, and the heat generated by the semiconductor control element 13 may cause the semiconductor control element 13 to be damaged by heat. Cooled by fan 12. Specifically, heat is radiated through the cooling fins 11 attached to the semiconductor control element 13, and wind is sent from the cooling fan 12 attached to the outside of the housing to the cooling fins 11 inside the housing to release the heat from the cooling fins 11. Is urging. In the first embodiment, the cooling fins 11 are arranged closer to the air inlet 21 from the housing center 14, and the cooling fan 12 is arranged on the housing surface provided with the air inlet 21.

The mounting arm 3 is connected to the cooling fin 11 side from the housing center 14 of the operation unit 2. A ball joint or the like is used for a connection between the mounting arm 3 and the operation unit 2. Can be operated rotatably.

With the configuration described above, in the first embodiment according to the present invention, the operation of the operation unit 2 in the rotation direction about the first rotation shaft 15 and the second rotation shaft 16 shown in FIG. it can.

Specifically, when the semiconductor control circuit 9 and the antenna unit 10 are formed in the same housing, considering the cooling efficiency of the cooling fins 11 attached to the semiconductor control element 13, the cooling fins 11 are arranged close to the intake port 21 or the exhaust port 22. Therefore, the center of gravity of the operation unit 2 is shifted toward the cooling fin 11 side. For this reason, depending on the connection position between the operation unit 2 and the mounting arm 3, the moment of inertia of the operation unit 2 becomes large, so that a large force is required at the start of the operation, and the burden on the operator is increased. 2 makes smooth operation difficult.

However, according to the first embodiment of the present invention shown in FIG. 1, since the mounting arm 3 is connected to the cooling fin 11 side from the housing center 14, the connection between the center of gravity of the operation unit 2 and the mounting arm 3 is performed. The position is close. Therefore, the distance between the center of gravity of the operation unit 2 and the first rotation shaft 15 and the second rotation shaft 16 when the operation unit 2 is operated is shortened, and the inertia in rotation about the first rotation shaft 15 and the second rotation shaft 16 is reduced. The moment can be reduced, and the operation in the rotation direction about the first rotation shaft 15 and the second rotation shaft 16 can be performed with a small force from the connection position of the other mounting arms 3. As a result, when the operator operates the operation unit 2, the operation can be smoothly performed without requiring an unnecessary large force.

In addition, the cooling fins 11 are arranged closer to the air inlet 21 from the housing center 14, and the cooling fan 12 is arranged on the housing surface provided with the air inlet 21, so that the weight distribution of the operation unit 2 is reduced. By concentrating near the connection position, it is possible to further reduce the moment of inertia in rotation about the first rotation shaft 15 and the second rotation shaft 16. The arrangement of the cooling fan 12 shortens the distance between the cooling fins 11 and the cooling fan 12, and the cooling fins 11 receive more wind that the cooling fan 12 takes in from outside the housing. Is further promoted, the load of the semiconductor control element 13 due to heat is reduced, and the semiconductor switching operation can be stabilized.

Further, in a microwave treatment environment, adverse effects such as malfunction or destruction of peripheral electronic devices or a microwave treatment device may be caused by microwave irradiation to an area other than the affected part. As a microwave shielding means, an electronic substrate such as a control circuit is preferably surrounded by a microwave reflecting material such as a metal. However, in the semiconductor control method, since the air inlet 21 or the heat exhaust port 22 is required on the housing surface, it is difficult to surround the housing with a microwave reflecting material or the like. Further, it is not preferable because it leads to an increase in the weight of the operation unit 2. Therefore, in the first embodiment, the intake port 21 or the heat discharge port 22 is formed in a mesh shape, and the length of the side of each mesh is set to １ ／ wavelength or less of the microwave wavelength, and the microwave enters the inside of the housing. Can be prevented or reduced, and destruction or malfunction of the microwave therapy device can be prevented.

(2nd Embodiment)
A second embodiment according to the present invention will be described with reference to FIG. Although the basic structure is the same as that of the first embodiment, the second embodiment is different from the first embodiment in that an intake-type cooling fan 19 is provided instead of the exhaust-type cooling fan 12. Hereinafter, points different from the first embodiment will be mainly described.

More specifically, the intake-type cooling fan 19 is disposed on the housing surface opposite to the cooling fins 11 from the housing center 14 where the exhaust heat port 22 is arranged, and the center of gravity of the operation unit 2 is set to be smaller than that of the first embodiment. It is moved from the body end to the housing center 14 direction. Further, with the movement of the center of gravity of the operation unit 2, the connection position between the operation unit 2 and the mounting arm 3 is moved from the end of the housing toward the center 14 of the housing from the first embodiment.

According to the configuration, in the first embodiment, when the operator grips the cooling fin 11 attachment side of the operation unit 2 and operates the operation unit 2, the operation is performed on the side opposite to the cooling fin 11 from the housing center 14. It was more difficult than when gripping and operating. However, in the second embodiment, while keeping the distance between the center of gravity of the operation unit 2 and the first rotation shaft 15 and the second rotation shaft 16 during operation of the operation unit 2 short, the connection position between the operation unit 2 and the mounting arm 3 is kept small. Is located closer to the center 14 of the housing than in the first embodiment, so that it is easier to grip the side of the operation unit 2 where the cooling fins 11 are attached. And can be operated smoothly.

(Third embodiment)
A third embodiment according to the present invention will be described with reference to FIGS. Although the basic structure is the same as that of the first embodiment, the third embodiment is different from the first embodiment in that an exhaust heat treatment unit 18 is further provided in the operation unit 2. Hereinafter, points different from the first embodiment will be mainly described.

Specifically, as shown in FIG. 5, the exhaust heat treatment means 18 for exhausting the exhaust heat of the cooling fan 12 backward from the microwave supply surface of the antenna unit 10 is disposed on the same housing surface as the exhaust heat port 22. As in the second embodiment, the connection between the operating unit 2 and the mounting arm 3 is moved from the housing end toward the housing center 14 from the first embodiment.

According to the configuration, in the first embodiment, when operating the operation unit 2, there is a possibility that the exhaust heat (warm air or cold air) of the cooling fan 12 hits the operator or the patient. However, in the third embodiment, a duct (wind passage) is disposed as the exhaust heat treatment means 18 on the side opposite to the cooling fan 12 from the housing center 14 of the operation unit 2. Therefore, it is possible to prevent the exhaust heat of the cooling fan 12 from hitting the operator or the patient, and to safely operate the operation unit 2. In addition, during treatment, the discomfort of the patient that the exhaust heat hits the body is eliminated, and the treatment can be received in a relaxed state.

As shown in FIG. 6, when the exhaust heat treatment means 18 is further provided in the second embodiment, by attaching the intake cooling fan 19 and the exhaust heat treatment means 18 to the intake cooling fan 19, an operator or a patient Can be prevented from being exposed to exhaust heat.

(Example 1)
Hereinafter, the operation unit according to the first embodiment of the present invention will be described with reference to FIGS. The operation unit 2 includes a semiconductor control element 13 for supplying microwaves, an antenna unit 10 for supplying microwaves to a patient, and a transmission path 23 for transmitting microwaves from the semiconductor control element 13 to the antenna unit 10. A cooling fin 11 and a cooling fan 12 for cooling the semiconductor control element 13 are provided in the same housing, and the cooling fan 12 is mounted on a housing surface outside the housing, and uses an exhaust type. In addition, an intake port 21 is provided on the housing surface to which the cooling fan 12 is attached, and a heat exhaust port 22 is provided on the opposite housing surface via the housing center 14.

As the semiconductor control element 13, an LDMOSFET and a GaAsFET can be used, but a GaNFET using GaN with a small switching loss is used for high efficiency. At the time of microwave output, the microwave of 2.45 GHz amplified by the semiconductor switching of the semiconductor control element 13 is supplied to the antenna unit 10 via the transmission line 23 and is supplied from the antenna unit 10 to the affected part. Further, in order to indicate the output state of the microwave to the operator or the patient, an LED (not shown) is illuminated when the gate of the GaN FET is turned on.

In addition, the transmission line 23 connecting the semiconductor control circuit 9 and the antenna unit 10 can be significantly shortened as compared with the magnetron method, minimizing the reflection loss of microwaves on the transmission line 23, and supplying from the semiconductor control circuit 9. The microwave thus obtained can be efficiently supplied from the antenna unit 10 to the affected part of the patient. Further, since the transmission path 23 is in the housing and is not touched by the operator or the patient, it is possible to reduce the failure of the transmission path 23.

Further, it is desirable to use a patch antenna of a plate antenna, a plate-shaped phased array antenna, a microstrip antenna, or a dipole antenna as the antenna unit 10 in order to reduce the size and weight of the operation unit 2.

The intake port 21 or the exhaust port 22 may be provided on the entire surface of the housing opposite to the housing surface on which the cooling fan 12 is mounted and the housing center 14 in consideration of the weight reduction of the operation unit 2. In order to prevent unnecessary dust and dirt from entering the housing, a minimum necessary cooling fan 12 and a housing surface contact area which do not affect the intake or heat discharge function are provided. In addition, the intake port 21 and the heat discharge port 22 are formed in a mesh shape, and the length of the side of each mesh is set to 1/4 wavelength of the microwave in order to reduce breakage and malfunction due to the penetration of the microwave into the housing. It is desirable to set it to a certain 30 mm or less. In the first embodiment, the frequency range of 2.4 GHz to 2.5 GHz is assigned to the microwave treatment device for medical use, so that it is ensured that the microwave of 2.4 GHz to 2.5 GHz enters the housing. In order to prevent this, the length is set to 5 mm or less and the length of each mesh side is reduced as much as possible.

Further, the center of gravity 25 of the operation unit 2 is biased toward the side where the cooling fins 11 are mounted from the center 14 of the housing, but in this embodiment, the first rotation shaft 15 passes through the center of gravity 25 of the operation unit 2 as shown in FIG. By connecting the mounting arm 3 to the operation unit 2, the distance between the center of gravity 25 of the operation unit 2 and the first rotation shaft 15 and the second rotation shaft 16 is minimized, and the first rotation shaft 15 and the second rotation shaft 16 are centered. The operation unit 2 can be smoothly operated by reducing the moment of inertia in the rotation.

(Example 2)
Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. 4 and 9 to 12. The basic structure is the same as that of the first embodiment, but the second embodiment includes an intake-type cooling fan 19 instead of the exhaust-type cooling fan 12. If the intake-type cooling fan 19 is disposed closer to the side opposite to the cooling fins 11 than the housing center 14 of the operation unit 2, the cooling is performed by moving the center of gravity of the operation unit 2 from the housing end toward the housing center 14. Operability when gripping the fin 11 attachment side is improved. Further, similarly to the first embodiment, the mounting arm 3 is connected to the operation unit 2 so that the first rotation shaft 15 passes through the center of gravity of the operation unit 2, thereby reducing the moment of inertia.

Further, considering that the center of gravity of the operation unit 2 moves from the end of the housing toward the center 14 of the housing and the connection position between the operation unit 2 and the mounting arm 3 is closer to the center 14 of the housing, the first embodiment has When the light is supplied, the fluorescent tube 17 (see FIG. 9) which emits light so that the state of supply of the microwave can be grasped, and is provided on the output side of the semiconductor control element 13 to prevent the reflection of the microwave and the like. An isolator 20 (see FIG. 10) or a handle 24 (see FIG. 11) for gripping the operation unit 2 to a desired position is further provided, and the cooling fin 11 is opposed to the housing center 14 of the operation unit 2. A similar effect can be obtained by arranging it close to the side. Further, when a patch antenna is used for the antenna unit 10, the same effect can be obtained by extending the patch antenna from the housing center 14 of the operation unit 2 to the side opposite to the cooling fan 12 (see FIG. 12). be able to.

(Example 3)
Hereinafter, a third embodiment of the present invention will be described with reference to FIGS. 5 and 6 or FIGS. The basic structure is the same as that of the first embodiment. However, in the third embodiment, the exhaust heat treatment unit 18 is further provided in the first embodiment. As shown in FIG. 5, a duct is used for the exhaust heat treatment means 18, which is disposed so as to cover the exhaust heat port 22, and discharges the exhaust heat backward from the microwave supply surface of the antenna unit 10, so that the operator And the patient can be prevented from being exposed to exhaust heat. As shown in FIG. 14, the heat exhaust port 22 is provided on the housing surface opposite to the antenna unit 10, and a duct or the like is provided inside the housing so that the exhaust heat is discharged therefrom. The configuration may be as follows.

As shown in FIG. 6, when an intake-type cooling fan 19 is used instead of the exhaust-type cooling fan 12, the intake-type cooling fan 19 and the exhaust heat-treating unit 18 are moved from the housing center 14 of the operation unit 2 to the cooling fan 11 and arranged on the opposite side. By attaching the intake-type cooling fan 19 to the heat exhaust port 22 and attaching a duct to the exhaust port of the intake-type cooling fan 19, the exhaust heat can be exhausted to the rear from the microwave supply surface of the antenna unit 10. Further, even if the duct is attached so as to cover the outlet of the intake-type cooling fan 19, the exhaust heat can be exhausted backward from the antenna unit 10.

Also, as shown in FIG. 13, the same effect can be obtained by covering the exhaust heat port 22 with a duct and attaching the intake-type cooling fan 19 to the exhaust port of the duct.

DESCRIPTION OF SYMBOLS 1 Main body part 2 Operation part 3 Mounting arm 10 Antenna part 11 Cooling fin 12 Cooling fan (exhaust type)
Reference Signs List 13 semiconductor control element 14 housing center 15 first rotation axis 16 second rotation axis 17 fluorescent tube 18 exhaust heat treatment means 19 intake cooling fan 20 isolator 21 intake port 22 heat exhaust port 23 transmission path 24 handle 25 center of gravity

Claims (9)

An operation unit having a semiconductor control element for supplying microwaves, a cooling fin and a cooling fan for cooling the semiconductor control element, and an antenna unit for supplying the microwaves to a patient in the same housing. An air inlet or a heat exhaust port on a part of the housing surface of the housing, wherein the cooling fin is inside the housing and the air inlet or the heat exhaust is located at a center of the housing of the housing. A microwave therapy device comprising: a mounting arm disposed to be close to a mouth; and a mounting arm for movably disposing the housing in a main body. The microwave therapy device according to claim 1, wherein the cooling fan is provided outside the housing and is arranged closer to the cooling fin side than the center of the housing. The microwave therapy device according to claim 1, wherein the cooling fan is provided outside the housing and is arranged closer to a side opposite to the cooling fins than a center of the housing. A fluorescent tube for notifying a microwave supply state to a patient, wherein the fluorescent tube is located outside the housing and is arranged closer to a side opposite to the cooling fins from the center of the housing. 3. The microwave therapy device according to 1 or 2. Exhaust heat treatment means for exhausting heat exhausted from the cooling fan to the rear of the antenna unit, wherein the exhaust heat treatment means is provided in the housing, and is provided on a side of the housing opposite to the cooling fins from the center of the housing. The microwave therapy device according to claim 1. The said housing | casing is provided with the isolator which prevents the reflected wave to the said semiconductor control element, The said isolator is arrange | positioned inside the said housing | casing toward the opposite side from the said cooling fin from the center of the housing | casing. 3. The microwave therapy device according to 1 or 2. A handle is provided for gripping the operation unit to move it to a desired position, and the handle is located outside the housing and is arranged closer to a side opposite to the cooling fins from the center of the housing. The microwave therapy device according to claim 1. 3. The microwave therapy device according to claim 1, wherein the antenna unit extends from a center of the housing to a side opposite to the cooling fin. 4. An exhaust heat treatment unit for disposing exhaust heat of the cooling fan behind the antenna unit, wherein the exhaust heat treatment unit is provided in the housing and provided on a side of the cooling fan from a center of the housing. 4. The microwave therapy device according to 3.