JPS6057350B2 - Ultra short wave treatment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in the transmission section and control section of an extremely high frequency treatment device.

In recent years, the therapeutic effects of microwaves have been recognized, and ultra-high frequency treatment devices such as the one shown in Figure 1 have become widespread, and at the same time, treatment methods have diversified. Treatment is being given.

At the same time, various types of antennas, which serve as irradiation parts, have been developed, depending on the purpose of treatment: a band-shaped type that emits radiation in a band-like shape, a wide-area type that radiates over a wide area, and a narrow-area type that radiates locally. These antennas are selected according to the purpose of treatment, and when performing treatment, each treatment device equipped with an individual antenna is prepared, or the antennas are exchanged and used in one treatment device. A method is being taken. The former requires more equipment than necessary;
Due to the high cost and the problem of installation space, the current method is to replace the antenna in most cases. When replacing this antenna, attach/detach it using the contact type coupler provided on the antenna which is the irradiation part.
The antenna was replaced, but this had the following drawbacks. The extremely short wave treatment device uses microwaves (2
450MH2), a skin effect phenomenon occurs in the transmission cable that connects the oscillating part and the irradiating part, in which current flows on the surface of the conductor, and the current density in the center conductor of the transmission cable is lower than that of the outer conductor. The power radiated from the antenna ranges from a few watts to hundreds of watts, depending on the treatment area and treatment purpose. Therefore, in such a transmission system that covers a wide area and requires large amounts of power, if a contact type coupler is used, it is necessary to use a correspondingly large contact type coupler and an equally thick transmission cable. It was also necessary to use either a flexible transmission cable with a maximum output tolerance or a comparable contact type coupler. The former coupling method is large and expensive, and the transmission cable lacks flexibility and has the disadvantage that the treatment area cannot be irradiated freely. A high frequency current exceeding the allowable current flows, the contact surface burns out, the characteristics of the metal on the contact surface change, the characteristic impedance becomes a dead point, and the failure rate of the device is high. Furthermore, since antenna replacement is frequently performed by doctors, physical therapists, nurses, and others who are not familiar with the handling of power-applied equipment, users may inadvertently replace the antenna while the equipment is in operation. This can result in the erroneous operation of irradiating high-power microwaves to the treatment area that should be treated with low power, which could not only cause the most dangerous situation for the patient, but also be extremely dangerous for the operator. It was hot.
Also, for equipment, antenna replacement may be incomplete.
If this is not done correctly, the output end will be in a no-load state,
Failures occurred frequently, including failures in the magnetron in the oscillation section, and excessive current flowing through the contact surface of the connector's center conductor, causing the connector to burn out. The present invention eliminates these conventional drawbacks and allows even a user who is not familiar with the handling of power application equipment to easily, safely and reliably replace the antenna in accordance with the treatment purpose using a single treatment device. I believe it is possible. Hereinafter, one embodiment of the present invention will be described in detail based on FIGS. 2 to 6. A non-contact type cavity coupler 3 is connected to the magnetron 2, which is an oscillation unit installed in the housing 1, and one end of the cavity coupler 3 is partially protruded outside the housing as shown in the figure. A connector A5 is provided with a tightening screw 4, and the connector A5 is fixed to the housing 1 with a fixing screw 6.

The anode 7 of the magnetoron 2 is grounded, and the cathode 8
are trans 1T1, trans liver 2 and trans 1T1,
2 which rectifies and adds the voltage supplied by the transformer liver 2
It is connected to the (-) side of a power supply section 9 consisting of bridge rectifiers RCl and RC2. The (+) side of the power supply section 9 is grounded and connected to the anode 7 of the magnetron 2. The control unit 10 includes a protection switch 11 and an output selector switch 1.
2 and an output adjustment circuit 13, the output adjustment circuit 1
3 is a voltage regulator SDl using, for example, a slider transformer, a time-limiting relay TMl, a zero position start switch SWl, and the like, in order to control the voltage supplied to the magnetron 2, so that the output can be arbitrarily varied in the range of supply voltage from zero volts. Consists of electromagnetic contactor RY. The protection switch 11 and the output changeover switch 12 each have a lever 114 and a lever 215 that partially protrude outside the housing 1 as shown in the figure.
14 and lever 215 are arranged and fixed in such a way that they become operational when pushed. A transmission cable 16 is connected to the outside of the housing 1 to provide a unique antenna 17 which is an irradiation unit and is suitable for the purpose of treatment, and the other side of the transmission cable 16 connected to the antenna 17 has a connector B18. , the connector Bl8 is provided with a tightening screw 4 for connection to the connector A5. Outer conductor 19 of transmission cable 16
is connected to a conductor Bl8 in the connector Bl8, and the conductor Bl8 contacts the inner wall of the connector A5 and is electrically connected. The center conductor 20 of the transmission cable 16 is inserted into the non-contact type cavity coupler 3 and connected at high frequency by coupling the connector A5 and the connector B18.
The connector Bl8 is provided with a flange 21 having a unique inner diameter r1 into which the lever 114 and the lever 215 are inserted when the connector Bl8 is tightened to a predetermined position as shown in the figure. protection switch 11,
Each lever of the output changeover switch 12 is pressed, each switch becomes operational, and contacts a and b of the protection switch 11 and contact cmd of the output changeover switch 12 are connected to obtain a large microwave output. There is. In addition, when a small microwave output is required for local treatment, etc.
When the flange 2V has an inner diameter R2 different from the flange 21, that is, is tightened to a predetermined position, push the lever 114 and press the lever 215.
When the protection switch 11 is tightened to the predetermined position using the flange (so as not to press the button), the protection switch 11 becomes operational and the contact
The configuration is such that the output selector switch 12 is inoperative and the contacts cme are connected. Further, the transmission cable 16 is firmly fixed to a cable fixing fitting 24 provided with a convex portion 23 with a bolt 22, and is connected to the connector B.
l8 is constructed so that it can rotate freely between the bolt 22 and the convex portion 23. In the extremely short wave treatment device configured in this manner, the connector Bl8 having the flange 21 having a unique inner diameter r1 is connected to the outer conductor 19 of the transmission cable 16 in order to connect it to the connector A5. The conductor Bl8 and the inner wall of the connector A5 come in contact with each other and are electrically connected, and the center conductor 20 of the transmission cable 16 is inserted into the non-contact type cavity coupler 3 to be inductively coupled and connected at high frequency. That will happen.

A voltage arbitrarily set within the maximum power of the specific antenna is supplied to the magnetron 2 by the control unit 10, the magnetron 2 oscillates, and the predetermined microwave power emitted from the magnetron 2 is transmitted to the non-contact cavity coupler 3. The emitted microwave power is transmitted to the transmission cable 16 and radiated from the antenna 17 which is the irradiation part. In the control unit 10, when the protection switch 11 and the output changeover switch 12 are in the operating state, when the operator manually sets the treatment time using the time relay TM, the time relay TM is activated and at the same time Contact Tm is connected.

Next, since the voltage regulator SD is designed to operate only when the output voltage is at the zero position (hereinafter referred to as the zero position), when the voltage regulator SD is at the zero position, the electromagnetic contactor RY A current flows through the coil, which is self-maintained by the contact Ryl of the electromagnetic contactor RY, and at the same time, the other contact Ry2 of the electromagnetic contactor RY is also interlocked to supply voltage to the voltage regulator SD. When the operator gradually increases the output of the voltage regulator SD manually, power is supplied to the primary side of the transformer liver 2 of the power supply section 9 through the contact cmd of the output changeover switch 12. In this state, connect connector Bl8 to replace the antenna.
As soon as the protection switch 11 is removed, the protection switch 11 becomes inoperative, power supply to the power supply section 9 is stopped, and no microwave output is produced. Tighten the connector Bl8 again to connect it, and the protection switch 11 becomes operational again. Also, since the zero position start switch SWl is inactive, the electromagnetic contact λY does not operate, and therefore the contact Ry2 is in a cut-off state, so no microwave output is output as described later. Voltage adjustment? D
Once reset to the zero position, power is supplied to the power supply section 9 in accordance with the operation of the control section 10 described above. Also, output selector switch 12
The voltage is changed by changing the winding ratio between the primary and secondary sides of the transformer π2, and the output selector switch 12
When is in operation, the voltage on the secondary side of transformer liver 2 is high,
In addition, when the output selector switch 12 is in the inactive state, it is set to a low value, that is, in the case of an antenna that requires a large output, the flange 2 with a unique inner diameter r1 is such that the lever 15 is pressed.
1, the output selector switch 12 is activated and the large machining switch 12 is activated. When a microwave output is obtained and the antenna is used for local treatment, etc., the output selector switch 12 is made inactive by the flange 2" with an inner diameter of R2 without pressing the lever 215, so a small microwave output is automatically turned off. Obtained: transformer 1T1
A voltage is always applied to the magnetron 2, and the voltage rectified by the rectifier RCl connected to the secondary side of the transformer 1T1 is supplied to the magnetron 2. This rectified voltage is set to a voltage immediately before the start of oscillation in accordance with the electrical characteristics of the magnetron 2. Further, the voltage supplied to the magnetron 2 is a voltage obtained by adding the voltage induced in the transformer 1T1 and the transformer liver 2 by the rectifiers RCl and RC2, and the voltage supplied to the voltage regulator SDl and the output changeover switch 12 in the output regulating circuit 13. The voltage arbitrarily set in , controls the microwave power emitted from the magnetron 2 , and the microwave power comparable to the controlled voltage is transmitted to the non-contact cavity coupler 3 and the transmission cable 16 , and the microwave power is transmitted from the antenna 17 to the transmission cable 16 . waves are emitted.

The present invention uses a non-contact type cavity coupler in the transmission part, and in order to link the protection switch and the output changeover switch by attaching and detaching the connector, the present invention not only uses a mechanism in which the non-contact type cavity coupler is interposed between the transmission part, but also It goes without saying that the scope of the present invention also falls within the scope of the present invention even if the antenna is connected to the irradiation section. As mentioned at the beginning, the ultra-high frequency treatment device of the present invention solves problems such as burning out of the contact part of the center conductor of a contact type coupler and erroneous irradiation of microwave power due to antenna replacement, which had been a particular problem in the past. In order to achieve this, the center conductor of the transmission cable with high current density is connected in a non-contact manner using a cavity coupler, and a flange is provided on connector B to avoid erroneous irradiation of microwave power due to antenna replacement.
Only when it is tightened to the specified position, the protection switch and output selector switch operate, controlling the output adjustment circuit, applying a specified voltage to the magnetron, and emitting the specified microwave power from the antenna, which is the irradiation part. It consists of a structure.

Furthermore, once the protection switch and time-limited relay become inoperative, even if they are immediately restored to operation, they are a safety mechanism that prevents microwave power from being emitted unless the voltage regulator is returned to the zero position. With an ultra-high frequency treatment device configured as described above, it is possible to freely select the type of antenna that suits the treatment purpose with a single treatment device, instead of using multiple treatment devices to perform treatment. Since the treatment can be tailored to suit your needs, it can be used for multiple purposes and is economically very inexpensive. In addition, antenna replacement can be done safely and reliably even by doctors, physical therapists, nurses, etc. who are not familiar with the handling of power application equipment by installing safety circuits such as protection switches and output selector switches. . In addition, the non-contact cavity coupler prevents failures due to burnout of the connector part, and since the center conductor of the transmission cable at the coupling part is non-contact, it is possible to prevent accidents due to burnout and provide flexible transmission. A cable can be used to easily irradiate any treatment area. Incidentally, it is easy for the person concerned to install a magnet on the flange of the connector B and to employ a reed switch or the like as each switch. Therefore, all of the various problems associated with the conventional products listed at the beginning have been solved, and we have now provided an extremely short wave treatment device that is highly useful and safe.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing a conventional ultrashort wave treatment device, Figure 2
The figure is a schematic configuration diagram showing an extremely short wave treatment device according to the present invention,
FIG. 3 is a detailed cross-sectional view of the coupling part according to the present invention, and FIG.
FIG. 5 is a block diagram according to the present invention, and FIG. 6 is an example of an implementation circuit according to the present invention. 1... Housing, 2... Magnetron, 3
...Non-contact cavity coupler, 4...Tightening screw, 5...Connector Al6...
Fixing screw, 7... Anode, 8... Cathode, 9... Power supply section, 10... Control section, 11
... Protection switch, 12 ... Output selection switch, 13 ... Output adjustment circuit, 14 ...
...Luba 1, 15...Luba 2, 16...
...Transmission cable, 17...Antenna, 18...
・Connector Bll9... Outer conductor, 20... Center conductor, 21... Flange, 22... Bolt, 2
3...Protrusion, 24...Cable fixing fitting.

Claims (1)

[Scope of Claims] 1. In an extremely high frequency treatment device comprising a power supply section, a microwave oscillation section, and a control section inside the housing, an irradiation section outside the housing, and a transmission section that couples the two, 1. An ultrashort wave treatment device, characterized in that a non-contact cavity coupler is provided in the section, and the oscillation section and the irradiation section are coupled outside the housing. 2. A control unit is composed of an output regulator and a protection switch provided to control the output regulator, and the output regulator is controlled by the protection switch, which is activated by the attachment and detachment of a connector connected to one end of a transmission cable. Claim 1
The ultrashort wave treatment device described in . 3. A control unit is constituted by an output regulator and an output changeover switch provided to control the output regulator, and the output changeover switch is operated by attaching/disconnecting a connector connected to one end of a transmission cable to control the output regulator. An extremely short wave treatment device according to claim 1. 4 A control unit is constituted by an output regulator, a protection switch provided to control the output regulator, and an output changeover switch, and the protection switch and output changeover switch operate by attaching and detaching a connector configured at one end of a transmission cable. The extremely short wave treatment device according to claim 1, which is configured to control a regulator.