JPH07289577A - Ultrasonic treating device - Google Patents

Abstract

PURPOSE:To provide an ultrasonic treating device capable of dealing with various different ultrasonic treatment methods with plural ultrasonic conductors and one unit of ultrasonic treating device body. CONSTITUTION:This ultrasonic treatment device has an oscillation circuit 103 which is capable of oscillating high-frequency signals of two kinds of different frequencies, the ultrasonic conductors 2, an overheat preventive function which is capable of changing over the decision criteria of the reflectivity of the radiation surface of the ultrasonic waves rising to a high level in the event of insufficiency of the contact of the ultrasonic conductors 2 with the human body and a program mode of alternately changing over the radiation method of the ultrasonic waves to continuous one and pulses.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic therapeutic device capable of performing ultrasonic treatment by various different methods with a single ultrasonic therapeutic device.

[0002]

2. Description of the Related Art Conventionally, there has been known a hyperthermia treatment for relieving symptoms by warming an affected part of a patient such as peripheral vascular disorder, rheumatism, or joint pain. As a device used for such hyperthermia treatment, an ultrasonic treatment device, an ultra-short wave treatment device, and an ultra-high frequency (microwave) treatment device are known. Among these, the ultrasonic treatment device is one in which an ultrasonic oscillator is caused to resonate and vibrate by an excitation circuit, and the ultrasonic waves generated thereby are selectively radiated to the affected part. This ultrasonic treatment device has the best invasion ability among the above-mentioned instruments for thermotherapy, and can enhance local substance metabolism by the deep massage effect and the hyperthermia effect. This ultrasonic treatment device holds the ultrasonic treatment device main body including an oscillation circuit, an output control circuit, and the like, and the ultrasonic transducer described above inside the distal end, and has an ultrasonic wave emitting surface that emits ultrasonic waves at the distal end. It is composed of a connector, a flexible metal tube or the like for structurally connecting the ultrasonic treatment device main body and the ultrasonic conductor, and an electric wire or the like for electrical connection. Then, by pressing the ultrasonic wave emitting surface of the ultrasonic wave guide against the affected area, ultrasonic waves are emitted to the affected area. In addition, ultrasonic waves are characterized in that the depth of the heating effect changes depending on the frequency. Taking advantage of this feature, in an ultrasonic treatment device, for example, an oscillating frequency of 3 MHz is used for treatment of the human body surface layer.
Ultrasonic waves, 1M oscillation frequency for treatment of deep human body
The ultrasonic wave of Hz is used.

By the way, the ultrasonic waves radiated from the radiation surface of the above-mentioned ultrasonic conductor are easily transmitted to the human body, but most of them are reflected by the air. If the reflectance on the radiation surface becomes high, the temperature of the surface of the ultrasonic conductor rises, and if the ultrasonic conductor comes into contact with the human body in this state, low temperature burns may occur at the contact site. To prevent this, the ultrasonic therapy device detects the reflectance of the ultrasonic wave on the emitting surface and reduces the radiation output when the reflectance becomes high while emitting the ultrasonic wave. A function to prevent overheating is provided.

The input impedance of the ultrasonic transducer terminal has a characteristic that its value changes depending on the reflectance of the ultrasonic wave on the radiation surface. Utilizing the characteristic, the detection of the reflectance of the ultrasonic wave on the radiation surface is generally performed indirectly by obtaining the input impedance of the ultrasonic transducer. The input impedance of the ultrasonic transducer can be obtained by detecting the input voltage and the input current of the ultrasonic transducer and calculating from the detected values. However,
In the actual treatment, when the radiation surface of the ultrasonic wave conductor is brought into direct contact with the human body, a certain amount of clearance is created between the radiation surface and the human body, so air enters into the clearance and the reflectance increases. There is a problem that it will end up. Therefore, in order to suppress the generation of the gap, the ultrasonic wave conductor is usually coated with a sound wave transmitting agent called a sound wave coupler and pressed against the human body. Therefore, the criterion for determining the reflectance in the above-mentioned overheat prevention function is set on the assumption that the acoustic wave coupler is applied in advance. Conventionally, ultrasonic gels or liquids for underwater treatment have been mainly used for this sonic coupler, but in recent years, analgesic ointments having a higher viscosity than these have also been used.

On the other hand, there are two methods of radiating ultrasonic waves in ultrasonic treatment: a method of continuously radiating ultrasonic waves to the affected area and a method of intermittently radiating ultrasonic waves to the affected area. In ultrasonic therapy, either of these ultrasonic wave emission methods is selected depending on the type of disease. Generally, a method of continuously emitting ultrasonic waves is used for treatment of chronic diseases, while a method of intermittently emitting ultrasonic waves is used for treatment of acute diseases. Further, particularly in the treatment of rheumatism, there is reported a treatment method in which two continuous and intermittent radiation methods are alternately repeated according to the ultrasonic radiation elapsed time during one treatment.

[0006]

By the way, in the above-mentioned conventional ultrasonic therapeutic device, the oscillation frequency of the excitation circuit for resonantly vibrating the ultrasonic vibrator is one kind in one ultrasonic therapeutic device. Therefore, when performing ultrasonic treatment using two kinds of ultrasonic waves of different frequencies, it was necessary to prepare two ultrasonic therapeutic devices having an excitation circuit of different frequencies. Further, in the conventional ultrasonic therapeutic device, the operation of the above-mentioned overheat prevention function is set to be constant regardless of the type of the acoustic wave coupler. However, in recent ultrasonic therapy, different acoustic wave couplers of the above-mentioned types may be selected and used. In the different acoustic wave couplers described above, since the acoustic wave couplers have different viscosities, even if the contact state between the human body and the radiation surface is the same, the reflectance of the ultrasonic wave radiation surface varies depending on the type of the acoustic wave coupler. Therefore, in the conventional overheat prevention function that determines the reflectance using one common determination criterion, the operation of the overheat prevention function is insufficient or the operation is excessive depending on the type of the acoustic wave coupler. There was a problem of doing.

Further, in the conventional ultrasonic treatment using the ultrasonic therapeutic device, when the ultrasonic wave emitting method is switched according to the elapsed radiation time, the operator switches the ultrasonic switch each time the method is changed. Was operated to switch the radiation method. Therefore, the operator of the ultrasonic therapy device monitors the treatment time and operates the switch of the radiation method provided in the ultrasonic therapy device main body, and the ultrasonic conductor separated from the ultrasonic therapy device main body touches. Surveillance of the treatment site being performed had to be performed. for that reason,
The above-mentioned ultrasonic treatment method performed by switching the radiation method has a problem that the operation of the ultrasonic treatment device is more troublesome than other treatment methods.

The present invention has been made under such a background, and is applicable to various different ultrasonic treatment methods described above.
An object of the present invention is to provide an ultrasonic therapeutic device that can be handled by a single ultrasonic therapeutic device.

[0009]

The invention according to claim 1 is
A first ultrasonic conductor having a first ultrasonic vibrator, and a second ultrasonic conductor having a second ultrasonic vibrator having a resonance frequency different from that of the first ultrasonic vibrator, An output terminal to which either one of the first and second ultrasonic conductors is attached, an oscillation circuit that oscillates and outputs a high frequency signal, and an amplification means that amplifies the output of the oscillation circuit and outputs the output to the output terminal. And a frequency switching means for selectively switching the oscillation frequency of the high frequency signal oscillated by the oscillation circuit to either the resonance frequency of the first ultrasonic oscillator or the resonance frequency of the second ultrasonic oscillator. An ultrasonic therapeutic device comprising:

According to the second aspect of the present invention, the first ultrasonic conductor has a first resistor, and the second ultrasonic conductor has a resistance different from that of the first resistor. A second resistor having a value, the first resistor or the second resistor and a third resistor provided in advance, the detected value obtained according to a resistance ratio of the third resistor, the first resistor A resistance value detecting circuit for detecting the resistance value of the first resistor or the second resistor, and a frequency setting signal for outputting a frequency setting signal for switching the frequency switching means according to the detection result of the resistance value detecting circuit. The ultrasonic therapeutic device according to claim 1, further comprising a signal output means.

According to a third aspect of the present invention, there is provided a first filter circuit for reducing a harmonic component of the output of the amplifying means, and a cutoff frequency different from that of the first filter circuit. A second filter circuit for reducing the higher harmonic component of the second filter circuit, and a filter circuit switching means for selecting one of the first filter circuit and the second filter circuit according to the frequency setting signal. The ultrasonic therapeutic device according to claim 2, wherein:

The invention according to claim 4 is an ultrasonic wave conductor comprising an ultrasonic wave oscillator and a radiation surface for radiating ultrasonic waves generated by the ultrasonic wave oscillator, and oscillates a high frequency signal. And an amplifying means for amplifying the output of the oscillating circuit and outputting it to the ultrasonic conductor, and a first detecting means for detecting values of voltage and current supplied to the ultrasonic conductor. And second detection means for detecting the impedance of the ultrasonic conductor based on the detection result of the first detection means, a first reference value and a second reference different from the first reference value. A reference value setting means for setting which of the values is selected, and the first value selected by the reference value setting means,
Comparing means for comparing one of the second reference values with the output of the second detecting means and outputting a comparison result, and output reduction for decreasing the output of the amplifying means in accordance with the output of the comparing means. An ultrasonic therapeutic device comprising means.

Further, in the invention according to claim 5, an ultrasonic wave conductor having an ultrasonic wave oscillator, an intermittent driving means for intermittently driving the ultrasonic wave conductor, and the ultrasonic wave conductor are continuously connected. An ultrasonic therapeutic device comprising: a continuous drive means for driving the motor, a timing circuit, and a switching means for switching between the intermittent drive means and the continuous drive means according to the time count of the timing circuit.

[0014]

In the ultrasonic therapeutic device according to the present invention, the first
When the ultrasonic conductor of No. 1 is attached to the output terminal of the ultrasonic treatment device, the oscillation circuit of the first ultrasonic transducer provided in the first ultrasonic conductor is selected by the frequency switching means. A high frequency signal having the same frequency as the resonance frequency is oscillated and output to the amplification means. The amplification means amplifies the input signal and supplies a high frequency output having the same frequency as the resonance frequency of the first ultrasonic transducer to the first ultrasonic conductor. The first ultrasonic wave conductor vibrates the first ultrasonic wave oscillator by the high frequency output supplied from the amplifying means to generate an ultrasonic wave. on the other hand,
When the second ultrasonic conductor is attached to the output terminal of the ultrasonic therapeutic device, the oscillation circuit has a second ultrasonic vibration selected by the frequency switching means and provided in the second ultrasonic conductor. A high frequency signal having the same frequency as the resonance frequency of the child is oscillated and output to the amplification means. The amplification means amplifies the input signal and supplies a high frequency output having the same frequency as the resonance frequency of the second ultrasonic transducer to the second ultrasonic conductor. The second ultrasonic wave conductor receives the second ultrasonic wave by the high frequency output supplied from the amplifying means.
The ultrasonic transducer is vibrated to generate ultrasonic waves. Therefore, in the ultrasonic therapeutic device of the present invention, one of two kinds of ultrasonic conductors provided with ultrasonic vibrators having different resonance frequencies is selected and attached to the output terminal of the ultrasonic therapeutic device. Thereby, it is possible to generate ultrasonic waves of different frequencies using one ultrasonic therapeutic device.

Further, the resistance value detection circuit determines the resistance ratio between the first and second resistors provided in the first and second ultrasonic conductors and the third resistor provided in advance. The resistance value of the first and second resistors is detected based on the detection value obtained accordingly. The frequency setting signal output means outputs a frequency setting signal for switching the frequency switching means according to the detection result of the resistance value detecting circuit. That is, by detecting the resistance values of the resistors provided in the first and second ultrasonic conductors, it is possible to determine which of the first and second ultrasonic conductors is attached to the output terminal. Then, according to the result, the oscillation frequency of the oscillation circuit is selected so as to match the resonance frequency of the first or second ultrasonic transducer.

Further, the filter circuit switching means selects either one of the first and second filter circuits for reducing the harmonic component of the output of the amplifying means according to the frequency setting signal. That is, the first or second filter circuit provided corresponding to the resonance frequency of each ultrasonic transducer is selected according to the first or second ultrasonic conductor attached to the output terminal, The harmonic components of the high frequency output supplied to the first or second ultrasonic conductor are reduced.

Further, in the ultrasonic therapeutic device of the present invention,
When the first reference value is selected by the reference value setting means and the impedance detected by the second detection means is higher than the first reference value, the output reduction means operates to operate the output control circuit. The output is reduced. On the other hand, when the second reference value is selected by the reference value setting means and the impedance detected by the second detection means is higher than the second reference value, the output reduction means operates to output the output. The output of the control circuit is reduced. Therefore, by changing the setting of the reference value setting means according to the types of the two kinds of acoustic wave couplers having the above-mentioned characteristics of different reflectances, the difference in the reflectances of the acoustic wave couplers is not always affected, and The function of preventing overheating of the ultrasonic wave conductor can be sufficiently exerted.

Further, in the ultrasonic therapeutic device of the present invention, the ultrasonic wave conductor is driven while switching intermittently or continuously in accordance with the time measured by the time measuring circuit. The radiation is emitted intermittently or continuously.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an ultrasonic therapeutic device according to an embodiment of the present invention. An ultrasonic therapeutic device according to an embodiment of the present invention shown in this figure is composed of an ultrasonic therapeutic device main body 1 and an ultrasonic conductor 2. The ultrasonic treatment device body 1 outputs high-frequency AC power for driving the ultrasonic conductor 2. The ultrasonic conductor 2 is an ultrasonic therapeutic device main body 1
An ultrasonic transducer 201 that inputs high-frequency AC power output from the ultrasonic transducer to generate ultrasonic waves, an ultrasonic wave emission surface (not shown), and a resistor used to identify the type of the ultrasonic transducer 201. And a container 202. Ultrasonic treatment device body 1
The main components of the
0 V AC power supply) is converted into a plurality of predetermined voltage power supplies and is supplied to each circuit section described later, a power supply circuit 101 that controls each section, an oscillator circuit that oscillates a high frequency signal of the resonance frequency of the ultrasonic transducer 201. 103, oscillator circuit 1
The output control circuit 105 amplifies the high frequency signal output from the circuit 03 to a predetermined magnitude and supplies the ultrasonic conductor 2 with high frequency AC power. With the above configuration, the ultrasonic treatment device main body 1
Oscillates a high-frequency signal from an externally supplied power source,
Amplification control is performed to generate high frequency AC power. Then, the ultrasonic conductor 2 generates ultrasonic waves by inputting the high frequency AC power generated in the ultrasonic treatment device body 1 described above and driving the ultrasonic vibrator 201, Ultrasonic waves are radiated to the affected area from the radiation surface provided on the surface. Further, the ultrasonic therapeutic device according to the present embodiment is provided with two kinds of ultrasonic conductors 2 including ultrasonic vibrators 201 having different resonance frequencies.
, Using a connector that can be repeatedly attached and detached.
By connecting to the output control circuit 105, high frequency AC power can be supplied to the selected ultrasonic conductor 2 to generate ultrasonic waves of two different frequencies.

Next, the details of the ultrasonic treatment device main body 1 and the ultrasonic conductor 2 shown in FIG. 1 will be described below. In FIG.
The power supply circuit 101 is a power supply (commercial 100
V AC power supply) is converted into a plurality of predetermined voltage power supplies and supplied to each circuit unit described later. Further, the power supply circuit 101 is configured by a power switch for the operator of the ultrasonic therapy device to turn on or off the commercial 100 V AC power supply, and further, a resistor, a capacitor, a diode, etc., and when the controller 102 is turned on. A reset signal generating circuit for generating a reset signal for initialization is provided. The power supply to each circuit unit of the power supply circuit 101 is a DC power supply INP1 which is an input power supply of the output control circuit 105, a DC 5V power supply which is a power supply of each controller 102 and each input / output circuit unit of the controller 102, and other circuit units. It is a positive and negative DC 12V power source used in.

The controller 102 includes a CPU (central processing unit), a ROM (read only memory), a RAM (random access memory), an AD converter (analog-digital converter) having a plurality of input terminals, and a plurality of outputs. DA converter (digital-analog converter) having terminals, digital input / output terminals, timer circuits, and
An external capacitor 115 connected to the terminals X1 and X2,
It is configured by a one-chip 8-bit microprocessor including an oscillation circuit for generating an internal clock signal using 116 and a crystal oscillator 117. Terminals AD1 and AD2 of the controller 102 are analog input terminals of the AD converter, terminals DA1 and DA2.
Is an analog output terminal of the DA converter, terminals P1, P2,
... P11 is a 1-bit digital input / output terminal. The details of the input / output signals of each terminal will be described later.

The oscillating circuit 103 is an oscillating circuit for oscillating a high frequency signal and oscillates by switching between two different frequencies. The signal FREF is a high frequency signal (5V high frequency pulse signal) that is the output of the oscillation circuit, and the output control circuit 105
Entered in. The signal FSEL is a digital signal for switching the oscillation frequency and is the output of the digital output terminal P1 of the controller 102. Here, the oscillation circuit 103
The configuration of the internal circuit of will be described with reference to FIG. Figure 2
In (a), 103a is a comparator, the positive power supply terminal is connected to the 5V power supply, and the negative power supply terminal is connected to the ground. 103c and 103d are resistors that determine the charging / discharging current of the capacitor 103e connected to the negative input terminal of the comparator 103a. Resistor 103f,
103g and 103h are resistors that set the voltage value input to the positive input terminal of the comparator 103a.
Reference numeral 103b is an analog switch that is closed when the digital signal FSEL is "1" and opened when it is "0". This analog switch 103b is
When the switch is closed, both the resistor 103c and the resistor 103d are connected in parallel to the capacitor 103e, and when the switch is open, only the resistor 103d is connected to the capacitor 103e. With the above configuration, the oscillator circuit 103 sets the resistors 103c and 103d and the capacitor 103e to predetermined values, so that when the digital signal FSEL is "1", the frequency of the frequency is 3 MHz and the digital signal FSEL is "0". At this time, a high frequency signal FREF having a frequency of 1 MHz is output.

An output mode setting circuit 104 is an analog signal input to the output control circuit 105 according to an output analog signal VLVL of the switching circuit 114, which will be described later, and a digital signal SGLM output from the terminal P2 of the controller 102. Output as VREF. As shown in FIG. 2B, the output mode setting circuit 104 includes an analog switch 104 similar to the analog switch 103b described above.
a and 104b and an inverter 104c, and when the digital signal SGLM is "1", the analog signal VREF
, The analog signal pressure VLVL is output as it is, and when the digital signal SGLM is “0”, the analog signal VREF is output.
Outputs a ground voltage (0V).

The output control circuit 105 amplifies the high frequency signal FREF output from the oscillation circuit 103 to a predetermined magnitude and supplies AC power to the ultrasonic conductor 2. The output control circuit 105 is composed of the following two main components.
The first main component is that the power supply circuit 10 uses the output analog signal VREF of the output mode setting circuit 104 as a command value.
1 is a voltage control unit VS that adjusts the voltage value of the DC power supply INP1 that is the output of No. 1 and outputs a DC constant power supply of a predetermined voltage.
The second main component is a DC constant power source that is the output of the voltage control unit VS, and a high frequency signal F that is the output of the oscillator 103.
It is a high-frequency signal amplifier HA that converts into a high-frequency AC power supply synchronized with REF. Next, the output control circuit 105 described above
Details of the first and second constituent elements will be described with reference to FIG.

In FIG. 2C, the voltage controller VS, which is the first main constituent element of the output control circuit 105, is
Adjust the voltage of DC power supply INP1 to obtain 105g capacitor
It is composed of a switching regulator that obtains a DC constant power source of a predetermined voltage at both ends. This switching regulator includes a power transistor 105b, an inductance 105f, a capacitor 105g, and a diode 10.
5e, and a power transistor 105
Resistor 105c, which is the base resistance of b, and resistor 105c
Through the transistor 105d for controlling on / off of the base current of the power transistor 105b flowing therethrough, the resistor 105h1 and the resistor 105h2 for dividing the terminal voltage of the capacitor 105g, the resistor 105h1 and the resistor 10
It is composed of a signal section including a switching regulator control circuit 105a that controls ON / OFF of the transistor 105d according to the divided voltage of 5h2 and the analog signal VREF. The switching regulator control circuit 105a includes a switching regulator control analog integrated circuit including a triangular wave oscillator, an operational amplifier, and the like, a resistor, a capacitor, and the like. The switching regulator control circuit 105a includes an input terminal 105
With the voltage of a1 (analog signal VREF) as the reference voltage, the input terminal 105a2 (resistors 105h1 and 10h
The transistor 105d is turned on / off by the output from the output terminal 105a3 so that the voltage value of the divided voltage of 5h2) matches the reference voltage. With the above configuration, the voltage control unit VS adjusts the DC power supply INP1 according to the analog signal VREF and outputs it from both ends of the capacitor 105g as a DC constant power supply of a predetermined voltage.

The high-frequency signal amplifier HA, which is the second main component of the output control circuit 105, is composed of a circuit other than the voltage controller VS which is the first component of FIG. 2C. 105 of the high-frequency signal amplifier HA shown in the figure
i1 and 105i2 are pulse transformers, one ends of primary coils of which are connected in series, one end of the primary coils is a DC 12V power source, and the other end is a MOSFET (metal oxide film field effect). Transistor) 10
It is connected to the drain of 5m. MOSFET 105
m is the high frequency signal FREF input to the gate
When is "1", the drain-source is turned on, and when "0", it is turned off. The secondary coil of the pulse transformer 105i1 is connected between the gate and source of the MOSFET 105k1 and both ends of the resistor 105j1. Each terminal of the secondary coil of the pulse transformer 105i2 is MOSF
Gate-source of ET105k2 and resistor 10
It is connected to both ends of 5j2. Pulse transformer 105
i1 is a reverse winding transformer, and is a pulse transformer 105i2.
Is a normal winding transformer. 105l1 and 105l2 are diodes, and MOSFETs 105k1 and 105l
When the 5k2 is turned on and off, the MOSFET 105
It operates so that no reverse voltage is applied between the drain and source of k1 and 105k2. With this configuration, when the high frequency signal FREF is "1", the MOSFET 105k1 is turned off and the MOSFET 105k2 is turned on. On the contrary, when the high frequency signal FREF is “0”, the MO
SFET105k1 turns on, MOSFET105k
2 turns off. Therefore, the voltage control unit V
The DC constant power source output from both ends of the S capacitor 105g is converted into a high frequency pulse power source synchronized with the high frequency signal FREF, and is output between the drain and source of the MOSFET 105k2.

105n whose one end is connected to the drain of the MOSFET 105k2 is a capacitor, and 105o whose one end is connected to the other end of this capacitor 105n is an inductance. The capacitor 105n and the inductance 105o together form a high-pass filter. This high pass filter is MOSFET 105k
The high frequency pulse power source output to the drain of 2 is converted into a high frequency AC power source by cutting the direct current component and the low frequency component, and output to both ends of the inductance 105o.

Reference numerals 105s1 and 105s2 denote inductances, which form a low-pass filter 105s together with the capacitor 105s3. 105t1 and 10
5t2 is an inductance and 105t3 is a capacitor, and constitutes a low-pass filter 105t similar to the low-pass filter 105s. Here, the cut-off frequency of the low-pass filter 105s is set to a frequency (for example, 1.1 MHz) suitable for reducing the harmonic component of the high-frequency AC power source having a frequency of 1 MHz, and the cut-off frequency of the low-pass filter 105t is set. The frequency is set to a frequency (for example, 3.3 MHz) suitable for reducing the harmonic components of the high-frequency AC power supply having a frequency of 3 MHz. 105g is a transistor, and the base resistor 10
Driven by the digital signal FSEL input through 5p, the contacts of the relays 105r1 and 105r2 are switched. The relays 105r1 and 105r2 are high-pass filters and the output terminal OUT of the output control circuit 105.
1 and 2 are connected by one of two types of low-pass filters. Here, when the digital signal FSEL is "1", the low-pass filter 105t
Is selected and the low-pass filter 105s is selected when the digital signal FSEL is "0".

With the above configuration, the output control circuit 105
First, the voltage control unit VS operates to adjust the voltage of the DC power supply INP1 by using the analog signal VREF as a command value and obtain a DC constant power supply of a predetermined voltage across the capacitor 105g. The analog signal V
REF is a voltage signal of ground voltage (0V) to 5V, and when the analog signal VREF is the ground voltage, the output control circuit 105 adjusts the voltage across the capacitor 105g to 0V. Secondly, the high-frequency signal amplifier HA described above causes the high-frequency signal FREF (3
Pulse signal of MHz or 1 MHz), the voltage control unit V
A high frequency pulse power supply (MOS) having a peak voltage of a DC constant power supply supplied to both ends of a capacitor 105g which is an output of S
(Drain-source output of FET 105k2). Further, the high frequency pulse power supply is configured such that the high frequency AC power supply (inductance 1
Output of both ends of 05o). This high-frequency AC power supply passes through a low-pass filter 105t having a cut-off frequency of 3.3 MHz when the digital signal FSEL is "1" and through a low-pass filter 105s having a cut-off frequency of 1.1 MHz when the digital signal FSEL is "0". It is output from the output terminal OUT1 (the other end of the output terminal is the ground).

In FIG. 1, reference numeral 106 denotes a current detection circuit, which outputs ultrasonic waves from the output terminals OUT1 and OUT2.
1 is a voltage signal IDET (analog signal) having a predetermined conversion ratio
Converted to and output. The detection of the current is performed by a detection element such as a shunt resistor or a Hall element and an amplifier circuit including an operational amplifier that amplifies the output signal and converts it into a voltage value of a predetermined ratio.

Reference numeral 107 denotes a voltage detection circuit, which has an output terminal O
The AC voltage v applied to the ultrasonic transducer 201 from the UT1 and OUT2 is detected, and the detected voltage value is converted into a voltage signal VDET (analog signal) having a predetermined conversion ratio and output. The voltage is detected by a voltage dividing circuit composed of a plurality of resistors.

Reference numeral 108 denotes a power calculation circuit, which is composed of a multiplication circuit composed of an analog integrated circuit for multiplication and division in which transistors, operational amplifiers, etc. are integrated, resistors, capacitors and the like, and inputs the calculation result of the multiplication circuit to obtain an average value. Average value circuit,
It is configured by each analog operation circuit such as an amplifier circuit which converts the output of the average value circuit into a voltage signal having a predetermined conversion ratio. Further, the analog signal IDET and the analog signal VDET are input to the multiplication circuit. With the above-described configuration, the power calculation circuit 108 can obtain the ultrasonic current by multiplying the alternating current i and the alternating voltage v.
The power p supplied to is calculated by the above-mentioned analog calculation circuit, the calculated calculation result is converted into a predetermined voltage conversion ratio, and then output as an analog signal PCAL.

Reference numeral 109 is an impedance calculation circuit,
A division circuit consisting of an analog integrated circuit for multiplication and division that integrates transistors, operational amplifiers, etc., to calculate the absolute value by inputting the calculation result of the division circuit, an absolute value circuit consisting of diodes, resistors, capacitors, etc. It is configured by each analog operation circuit such as an amplifier circuit which converts an output into a voltage signal having a predetermined conversion ratio. Further, the division circuit includes the above-mentioned analog signal IDET and analog signal VDE.
T has been entered. With the above configuration, the impedance arithmetic circuit 109 obtains the input impedance z of the ultrasonic transducer 201, which can be obtained by division from the alternating current i and the alternating voltage v, by the analog arithmetic circuit described above, and the obtained arithmetic result is predetermined. After being converted into the voltage conversion ratio of, the analog signal ZCAL is output. In this embodiment, when the ultrasonic conductor 2 appropriately contacts the affected area and the input impedance of the ultrasonic transducer 201 is normal, when the type of the above-mentioned acoustic wave coupler is gel, a voltage of less than 3 V is analog. The constants and voltage conversion ratios of the above-described arithmetic units are set so that a voltage of less than 4V is output from the analog signal ZCAL when output from the signal ZCAL and the type of sonic coupler is an ointment.

Reference numeral 110 denotes an output adjusting circuit, which outputs an analog signal VNML according to the result of comparing the analog signal PREF and the analog signal PCAL output from the output terminal DA1 of the DA converter of the controller 102. Further, the output adjusting circuit 110 is configured by an operational amplifier or the like, and the analog signal PCAL changes the analog signal PR.
When it is smaller than EF, the analog signal VNML is increased, and conversely, the analog signal PCAL is changed to the analog signal PR.
When it is larger than EF, it operates so as to reduce the analog signal VNML. That is, the output adjustment circuit 110
The analog signal VNML is increased / decreased and output so that the analog signal PCAL representing the actual input power of the ultrasonic transducer 201 matches the analog signal PREF representing the target value of the input power of the ultrasonic transducer 201.

The comparison circuit 111 is composed of a comparator 111a shown in FIG. In FIG. 2D, the analog signal ZCAL is output to the negative input terminal of the comparator 111a and the analog signal ZREF output from the output terminal DA2 of the DA converter of the controller 102.
Is connected to the positive input terminal of the comparator 111a. Therefore, the digital signal ZCMP which is the output of the comparison circuit 111 becomes "0" when the analog signal ZCAL is larger than the analog signal ZREF, and conversely becomes "1" when the analog signal ZCAL is smaller than the analog signal ZREF. . Then, in the present embodiment, the analog signal ZREF is set to 3V when the type of the sonic coupler is gel, while it is set to 4V when the type of the sonic coupler is ointment. Thereby, the digital signal ZCMP is generated when the ultrasonic conductor 2 appropriately contacts the affected area and the input impedance of the ultrasonic transducer 201 is normal regardless of the type of the acoustic wave coupler (that is, the ultrasonic wave described above). (When the reflectance on the radiation surface of is low)
Is "1", and is "0" when the impedance of the ultrasonic transducer 201 is abnormal (that is, when the reflectance of the ultrasonic wave emitting surface is high).

As shown in FIG. 2E, the switching circuit 114 is composed of analog switches 114a and 114b and an inverter 114c. When the digital signal VSEL is "1", the analog signal VNML is output as the analog signal VLVL, and the digital signal VS
When EL is "0", the analog signal VLOW is output as the analog signal VLVL. The analog signal V
LOW is a voltage signal determined by the voltage division ratio of the resistor 112a and the resistor 112b.
01 is a signal that becomes the analog signal VREF that is a command value of the output control circuit 105 when the input power of 01 is reduced.

According to the configurations of the output mode setting circuit 104 and the switching circuit 114, the analog signal VREF which is the command value of the output control circuit 105 is created by the digital signals SGLM and VSEL as follows. First,
When the digital signal SGLM is "0", the digital signal V
The analog signal VREF becomes the ground voltage (0V) regardless of SEL. On the other hand, the digital signal SGLM
Is "1", the digital signal VSEL is "1", and the analog signal VN is
ML becomes analog signal VREF and digital signal SG
When LM is "0", the analog signal VLOW becomes the analog signal VREF.

Reference numeral 113 denotes a resistor, which together with the resistor 202 constitutes a voltage divider that divides the 5V power supply by the resistance ratio. The divided voltage of the resistor 113 and the resistor 202 is input to the input terminal AD1 of the AD converter of the controller 102. In this embodiment, the resistor 113 is set to 10 kΩ, and the resistor 2 provided in the ultrasonic conductor 2 formed of the ultrasonic transducer 201 having a resonance frequency of 3 MHz.
The resistance value of 02 is, for example, 4.3 kΩ, and the resonance frequency is 1
Ultrasonic conductor 2 composed of ultrasonic transducer 201 of MHz
The resistance value of the resistor 202 provided in the is set to, for example, 23 kΩ. As a result, when the ultrasonic conductor 2 for a frequency of 3 MHz is connected to the ultrasonic treatment device body 1, the voltage value input to the terminal AD1 of the controller 102 is about 3.
When the ultrasonic conductor 2 for 5 V and frequency 1 MHz is connected to the ultrasonic treatment device body 1, the terminal A of the controller 102 is connected.
The voltage value input to D1 is about 1.5V. Further, when the ultrasonic conductor 2 is not normally connected to the ultrasonic treatment device main body 1, the resistor 202 cannot form a voltage divider together with the resistor 113, so the controller 10
A ground voltage (0V) is input to the second terminal AD1.

As shown in FIG. 1, resistors 118, 119 and 120 and switches 121, 122 and 123 are
The digital input terminal P5 of the controller 102,
It is connected to P6 and P7. These switches 1
The open / closed states of 21, 122 and 123 are input to the controller 102 as digital signals as follows. The switch 121 is a switch for setting the type of the sonic coupler described above. When the switch 121 is closed, the type of the sonic coupler is set to ointment (“0” is set to the terminal P5).
Is input), and when the switch 121 is opened, the gel is set (“1” is input to the terminal P5).

The switch 122 determines whether the above-mentioned ultrasonic wave emission method is a continuous emission method (hereinafter referred to as a continuous mode) or an intermittent emission method (hereinafter referred to as a pulse mode). It is a switch for setting, and when the switch 122 is closed, it is in the pulse mode (“0” is inputted to the terminal P6), and when the switch 122 is open, it is in the continuous mode (to the terminal P6). "1" is input) is set.

The switch 123 sets the above-mentioned ultrasonic wave emission method to either one of a continuous mode and a pulse mode (hereinafter referred to as a normal mode),
Alternatively, it is a switch for setting which of a method of emitting ultrasonic waves (hereinafter referred to as a program mode) while alternately switching between the continuous mode and the pulse mode according to the treatment time, and the switch 123 is closed. At this time, the program mode is set (“0” is input to the terminal P7), and when the switch 123 is open, the normal mode is set (“1” is input to the terminal P7).

Reference numeral 124 denotes a resistor, which is a variable resistor 125.
It is connected to a switch-integrated variable resistor 125 including a and a switch 125b, and a digital input terminal P8 of the controller 102. The sliding terminal of the variable resistor 125a is connected to the input terminal AD2 of the AD converter of the controller 102. This switch 125b
This is an operation switch used when the operator turns on or off the output of the ultrasonic treatment device body 1 (that is, the electric power input to the ultrasonic transducer 201 from the output terminals OUT1 and OUT2). When the operation switch 125b is closed (“0” is input to the terminal P8), the controller 10
2 sets the output of the ultrasonic treatment device main body 1 to ON, and when the switch is open (the terminal P8 has "
The output is set to OFF. The variable resistor 125a is used by the operator to set the target value of the input power of the ultrasonic transducer 201 described above. When the pressure ratio is minimum, a voltage value of 0 V is input to the input terminal AD2, and the controller 102 causes the target value of the input power of the ultrasonic transducer 201 (the analog signal PR
EF) is set to the minimum value. On the other hand, the variable resistor 125
When the voltage division ratio of a is maximum, a voltage value of 5 V is input to the terminal AD2, and the controller 102 causes the ultrasonic transducer 2
The target value (analog signal PREF) of the input power of 01 is set to the maximum value.

Reference numeral 126 is a buzzer, which is composed of a piezoelectric element. 127 and 128 are resistors,
Each is connected to a light emitting diode 129 and 130. Buzzer 126 and light emitting diodes 129, 13
0 is connected to the output terminals of the inverters 131, 132 and 133, respectively. Inverters 131, 13
The input terminals of 2 and 133 are respectively the controller 10
Two digital output terminals P9, P10 and P11 are connected. As a result, the digital output terminal P9 becomes "
The buzzer turns on when it is "1" and turns off when it is "0". Also, when the digital output terminal P10 is "1",
The light emitting diode 129, which displays the supply state of the input power of the ultrasonic transducer 201, is turned on, and is turned off when it is "0". Further, when the digital output terminal P11 is "1", the light emitting diode 13 for displaying the type of the ultrasonic conductor 2 is displayed.
0 turns on, and turns off when "0". In this embodiment, when the light emitting diode 129 is turned on, it is displayed that the input power of the ultrasonic transducer 201 is normally supplied, and when the light emitting diode 130 is turned on, the above-mentioned ultrasonic power is supplied. It is displayed that the frequency of the sound wave oscillator 201 is 3 MHz.

The operation of the controller 102 will be described below with reference to the flow charts shown in FIGS. 3 is a flow chart showing the outline of the main program of the controller 102, and FIG. 4 is a flow chart showing the outline of the three types of sub-programs called from the main program shown in FIG. The main program shown in FIG. 3 is started after the controller 102 is supplied with 5V power from the power supply circuit 101 and further a reset signal is input. First, in step S1, initial settings such as setting of the A / D converter inside the controller 102, setting of the D / A converter, setting of the input / output direction of the digital input / output terminal, and setting of the timer circuit are performed. Further, in step S1, the output of the DA converter and the output of the digital output terminal are initialized to 0V and "0", respectively.

Next, in step S2, the state of the operation switch 125b is read. Step S2
Then, when the operation switch 125b is turned on (that is, the digital input terminal P8 = "0"), the initial setting and the operation switch interrupt processing of the operation switch interrupt processing that occurs when the operation switch 125b is turned off next time are possible. Is set. In the operation switch interrupt process, a process of jumping to step S1 is performed when the operation switch 125b is turned off. As a result, in the operation switch interrupt processing, the operator turns off the operation switch 125b to turn off the output of the ultrasonic therapy device regardless of the operating states of the timer 1 and the timer 2 (described below from the digital output terminal P2). "0" is output, that is, the digital signal SGLM.
Is set to "0". ) Is done.

Next, in step S3, the voltage of the input terminal AD1 is read, and the type (frequency) of the ultrasonic conductor 2 is determined by the value thereof. Then, the digital signal VSEL is set as follows according to the determined frequency of the ultrasonic transducer 201. The frequency of the ultrasonic transducer 201 is 3 MH
z (that is, the input terminal AD1 is about 3.5V (3V
.About.4V)), the digital signal VSEL is set to "1". On the other hand, the frequency of the ultrasonic transducer 201 is 1 MH
z (that is, the input terminal AD1 is about 1.5V (1V
~ 2V)), the digital signal VSEL is set to "0". The frequency of the ultrasonic transducer 201 is 3M
Only at Hz, from digital output terminal P11
1 "is output to turn on the light emitting diode 130. In step S3, the input terminal AD
When the voltage of 1 is less than 1V, it is determined that the above-mentioned ultrasonic conductor 2 is not normally connected to the ultrasonic treatment device main body 1, and "1" is output from the digital output terminal P9. After turning on the buzzer 126, the main program is terminated. When the main program ends in the controller 102, the main program is restarted by an operation switch interrupt process that occurs when a reset signal is input to the controller 102 or the operation switch 125b is turned off.

Next, in step S4, the switch 12
The state of 1 (the input signal of the digital input terminal P5) is read, and the type of the sonic coupler is determined by the value thereof. Then, depending on the type of the sonic coupler determined,
The output voltage of the output terminal DA2 is set as follows. That is, when the switch 121 is on, the type of the sonic coupler is ointment, so the output terminal D
The setting for outputting 4V from A2 is performed. On the other hand, when the switch 121 is off, since the type of the sound wave coupler is gel, the output terminal DA2 outputs 3V.

Next, in step S5, it is determined whether the ultrasonic wave emission method is the normal mode or the program mode based on the state of the switch 123 (digital input terminal P7). Then, when the setting of the radiation method is the normal mode (when the digital input terminal P7 = “1”), the process proceeds to step S6.

In step S6, the total treatment time (treatment end time) in one treatment of the ultrasonic therapeutic device is set in the timer 1 which is one of the timer circuits built in the controller 102, and the operation of the timer 1 is performed. Start. The timer circuit includes a circuit that ends the operation when a set time has elapsed from the start of the operation, and further stores and holds the end of the operation. Here, in step S6, the timer 1 is set to 1
It is set for 5 minutes and the operation can be started.

Next, in step S7, the switch 122 determines whether the ultrasonic radiation method is continuous mode or pulse mode.
It is determined based on the state of (digital input terminal P6). When the emission method is set to the continuous mode (when the digital input terminal P6 = "1"), step S
At 8, the program proceeds to the continuous mode subprogram. The continuous mode subprogram will be described later. Then, when this continuous mode sub-program ends, the next step S1
Go to 1.

In step S11, the digital output terminal P
2, P9, P10 and P11 are set to "0" to turn off the emission of ultrasonic waves, turn off the light emitting diodes 129 and 130, and turn off the buzzer 126. Then, the main program ends.

On the other hand, in step S7 described above, if the emission method is set to the pulse mode (digital input terminal P6
= “0”), the process proceeds to the pulse mode subprogram in step S9. Then, when the pulse mode subprogram is completed, the process proceeds to step S11 described above.

On the other hand, when the emission method is the setting of the program mode in the above-mentioned step S5 (when the digital input terminal P7 = “0”), the program mode sub-program proceeds to step S10. Then, when the program mode sub-program ends, the above-mentioned step S
Proceed to 11.

Next, the program flow of the continuous mode subprogram, the pulse mode subprogram, and the program mode subprogram will be described with reference to FIGS. 4A, 4B, and 4C, respectively. FIG. 4A is a flowchart of the continuous mode subprogram. In this continuous mode subprogram, first, in step SA1, it is determined whether or not the operation of the timer 1 has ended. Then, when the operation of the timer 1 is finished,
Return from the continuous mode subprogram to the program that called the program. On the other hand, if it is determined in step SA1 that the operation of the timer 1 has not ended, the process proceeds to step SA2. At step SA2, the following items (1) to (3) are processed. When the following process is completed in step SA2, the process returns to step SA1.

(1) Read the target value of the input power of the ultrasonic transducer 201 set by the variable resistor 125a at any time (that is, read the voltage value of the input terminal AD2),
After performing a predetermined conversion and correction, the analog signal PREF is output from the output terminal DA1. Further, the digital signal SGLM and the digital signal VSEL (digital output terminals P2 and P3) are set to "1". As a result, the input command value VREF of the output control circuit 105 is determined according to the setting of the analog signal PREF (that is, the variable resistor 125a) and the analog signal PCAL, except for the condition determined in the next item (2). Further, the operation stop state of the timer 1 is released.

(2) When the state where the input impedance of the ultrasonic transducer 201 is not normal continues for more than 0.5 seconds while the ultrasonic wave is being radiated, the output control circuit 105
The command value of 1 is set to the minimum, and the operation of the timer 1 is stopped. In other words, the digital SGLM signal setting is "
1 "(digital output terminal P2 =" 1 ") and the digital signal ZCMP (digital input terminal P4) is" 0 ".
, The digital signal SGLM is established.
Is "1" and the state where the digital signal ZCMP is "1" does not hold for 0.5 seconds or longer, the digital signal VSEL (digital output terminal P3) is set to "0".
And the operation of the timer 1 is stopped. When the digital signal SGLM is "1" and the digital signal ZCMP is "1", the digital signal VSEL is set to "1".

(3) When the digital signal VSEL is "1", the light emitting diode 129 which indicates the supply state of the input power of the ultrasonic transducer 201 is turned on (digital output P1).
A process of outputting "1" from 0) and turning off the buzzer 126 (outputting "0" from the digital output P9) is performed. On the other hand, when the digital signal VSEL is “0”, the light emitting diode 129 is turned off (digital output P10
To output "0") and turn on the buzzer 126 (output "1" from the digital output P9).

Next, the program flow of the pulse mode subprogram will be described with reference to FIG. In step SB1 of the pulse mode subprogram, as in step SA1 of the continuous mode subprogram, it is determined whether the operation of the timer 1 has ended. Then, if the operation of the timer 1 has ended, the program returns from the pulse mode subprogram to the program that called the program. On the other hand, if it is determined in step SB1 that the operation of the timer 1 has not ended, the process proceeds to step SB2. Next, in step SB2, the following process (1) '
And the same processes as the processes (2) and (3) in step SA2 described above are performed. And step SB
Return to 1.

The processing of item (1) 'in step SB2 will be described below. (1) ′ The target value of the input power of the ultrasonic transducer 201 set by the variable resistor 125a is read at any time (that is, the input voltage value of the input terminal AD2 is read), and after performing predetermined conversion and correction, The analog signal PREF is output from the output terminal DA1. Furthermore, from the digital signal SGLM (that is, the digital output terminal P2), "1" is output.
And "0" are output intermittently and repeatedly. Here, after "0" is output for 8 ms, the time is 2 ms.
The intermittent output signal in which "1" is output during the period is repeatedly output as the digital signal SGLM. Also, the digital signal VSEL (that is, the digital output terminal P3) is "
Therefore, the output control circuit 105 is set under the condition other than the condition determined in the process (2) of step SA2.
The input command value of is determined according to the setting of the analog signal PREF (that is, the variable resistor 125a). Then, the timer 1 is set to the operating state.

Next, the program flow of the above-mentioned program mode subprogram will be described with reference to FIG. In the program mode subprogram, first, in step SC1, the timer 2 which is a timer circuit similar to the timer 1 is set. At step SC1, the timer 2 is set to 15 minutes and the operation is started.
Next, in step SC2, it is determined whether the operation of the timer 2 has ended. If the operation of the timer 2 has ended in step SC2, the program mode subprogram returns to the program that called the program.

On the other hand, if it is determined in step SC2 that the operation of the timer 2 has not ended, the process proceeds to step SC3. In step SC3, the timer 1 process is performed in the same manner as in step S6. However, in step SC3, the timer 1 is set to 1 minute. Next step SC
When it proceeds to 4, it proceeds to the continuous mode subprogram described above.
When the continuous mode subprogram ends, step SC5
Go to. In step SC5, the processing of timer 1 is performed as in step SC3. In step SC5, timer 1 is set to 1 minute as in step SC3.
Next, in step SC6, the process proceeds to the pulse mode subprogram. When the pulse mode subprogram ends, the process returns to step SC2.

Next, the operation of the ultrasonic therapeutic device having the above construction will be described according to conditions. (A) In advance, the operator connects the ultrasonic conductor 2 having a frequency of 3 MHz to the ultrasonic treatment device main body 1, and then the power supply circuit 1
After turning on the power switch of 01, turning on the switch 121 and setting the type of the sonic coupler to ointment, turning off the switches 122 and 123 and setting the continuous mode ultrasonic wave emission method, the operation switch 125
When b is turned on, the ultrasonic conductor 2 radiates an ultrasonic wave having a frequency of 3 MHz. Here, the ultrasonic therapy device turns on the light emitting diode 129 to indicate that the ultrasonic waves are normally emitted, and turns on the light emitting diode 130.
Displays that the frequency of ultrasonic waves is 3 MHz. The power supplied to the ultrasonic conductor 2, that is, the ultrasonic radiation output is adjusted by the operator operating the resistor 125a. When the contact between the ultrasonic wave conductor 2 and the human body is sufficient, the treatment elapsed time after the activation switch 125b is turned on for 15 minutes or when the switch 125b is turned off, the ultrasonic wave is emitted. Is turned off, and the light emitting diodes 129 and 130 are turned off. When the above operation is completed, the ultrasonic therapeutic device stops operating. The restart is performed by once turning off the operation switch 125b or the power switch and then turning it on again.

(B) In the above operation (a), the frequency 1
When the MHz ultrasonic wave conductor 2 is connected to the ultrasonic treatment device main body 1, the ultrasonic wave conductor 2 emits ultrasonic waves having a frequency of 1 MHz, and the light emitting diode 129 is turned off.

(C) In the above operation (a), the state in which the contact between the ultrasonic wave conductor 2 and the human body is not sufficient, which is determined based on the reflectance determination criteria when the type of the acoustic wave coupler is ointment, is 0. If it lasts more than 5 seconds, the ultrasonic power is reduced. At the same time, the buzzer 126 is turned on and the light emitting diode 129 is turned off. After that, when the contact between the ultrasonic conductor 2 and the human body becomes sufficient, the ultrasonic radiation output is
As in the operation (a), the output is adjusted by the resistor 125a being again operated by the operator. Further, the buzzer 126 is turned off, and the light emitting diode 12
9 lights up. In addition, when the switch 121 is turned off in advance and the type of the sonic coupler is set to gel, in the above operation, it is determined based on the determination criterion of the reflectance when the type of the sonic coupler is gel. When the state where the sound wave conductor 2 and the human body are not sufficiently contacted with each other continues for 0.5 seconds or more, the ultrasonic wave radiation output is reduced. The time during which the radiation output of ultrasonic waves is reduced is not included in the above-mentioned treatment elapsed time of 15 minutes.

(D) In the above operation (a), when the switch 122 is turned on in advance and the pulse mode ultrasonic wave emission method is set, the ultrasonic wave emission is 8 ms.
After being turned off for a while, ultrasonic waves are repeatedly emitted by an intermittent emission method with a period of 10 ms, which is turned on for 2 ms.

(E) On the other hand, in the above operation (a), when the switch 123 is turned on in advance and the program mode emission method is set, ultrasonic waves are emitted for 1 minute in the continuous mode and for 1 minute in the continuous mode. And the radiation in the pulse mode of 1 are alternately emitted in a cycle of 2 minutes.

In the above embodiment, the frequency of the ultrasonic conductor 2 is set by setting the resistor 2 provided in the ultrasonic conductor 2.
However, it is also possible to provide a switch similar to the switch 121 so that the operator sets the frequency of the ultrasonic wave.

In the above embodiment, the oscillator circuit 1
Reference numeral 03 designates an oscillation circuit capable of oscillating by switching between two kinds of preset frequencies of 3 MHz or 1 MHz. In order to correct the variation of the resonance frequency due to the individual difference of the ultrasonic transducer 202, for example, the controller 10
It is also possible to combine a frequency dividing circuit whose frequency dividing ratio can be changed by 2 and a phased lock loop oscillator capable of switching the fundamental oscillation frequency between 3 MHz and 1 MHz so that the oscillation frequency can be finely adjusted.

Further, in the above embodiment, the ultrasonic wave emitting method in the program mode is predetermined to be the only one in which the continuous mode and the pulse mode having a predetermined interruption time are alternately switched at a fixed time. However, the radiation method in the program mode can be set as follows. As a method of setting the ultrasonic wave emission method in the program mode, by providing a key switch group in which function keys and 10 keys are combined,
The setting value of the ultrasonic output magnitude in the continuous mode, the duration and the intermittent period of the pulse mode, the on / off ratio of the intermittent cycle, the setting value of the ultrasonic output magnitude in the pulse mode, and a plurality of pulse modes are set. A method of setting a combination or the like is possible. It is also possible to store the output method thus set as follows. As a method of storing the settings of these program modes, a method of using IC cards, magnetic cards, or the like to store the set values for each patient or each symptom of a disease can be considered.

In the above embodiment, only the frequency of the ultrasonic conductor 2 is discriminated using the resistor 202, but the resistor 20 is similarly discriminated by the different radiation surface sizes.
2 can also be used.

Further, in the present embodiment, the end time of the ultrasonic treatment is set to 15 minutes in advance, but the operator may provide an input means that can be arbitrarily set so that it can be set variably. Good.

[0072]

As described above, according to the first aspect of the invention, the oscillation frequency of the high frequency signal oscillated by the oscillation circuit is set to the resonance frequency of the first ultrasonic transducer or the second ultrasonic oscillation. Since the frequency switching means for selectively switching to one of the resonance frequencies of the child is provided, the first ultrasonic conductor having the first ultrasonic transducer or the second ultrasonic transducer having the second ultrasonic transducer is provided. By selecting either one of the ultrasonic conductors and attaching it to the output terminal of the ultrasonic treatment device, 1
With the ultrasonic therapeutic device of the table, it is possible to obtain the effect that the ultrasonic waves having two kinds of frequencies, that is, the resonance frequency of the first ultrasonic transducer or the resonance frequency of the second ultrasonic transducer can be generated.

According to the second aspect of the invention, the first ultrasonic conductor of the ultrasonic therapeutic device of the first aspect is provided with the first resistor, and the second ultrasonic transducer is provided. First for sound conductor
A second resistor having a resistance value different from that of the above resistor was provided. A resistor for detecting the resistance value of the first and second resistors based on the detection value obtained according to the resistance ratio between the first and second resistors and the third resistor provided in advance. The value detection circuit and the frequency setting signal output means for outputting the frequency setting signal for switching the frequency switching means according to the detection result of the resistance value detection circuit are provided. As a result,
By detecting the resistance value of the resistor provided in the second ultrasonic conductor, it is determined which of the first ultrasonic conductor and the second ultrasonic conductor is attached to the output terminal, and the oscillator circuit The oscillation frequency is selected to match the resonance frequency of the first or second ultrasonic transducer. Therefore, since the operator selects either the first or second ultrasonic conductor and attaches it to the output terminal of the ultrasonic treatment device, the oscillation frequency of the oscillation circuit is selected. The effect that there is no need to set the frequency of the sound wave is obtained.

According to the invention of claim 3, the first filter circuit for reducing the harmonic component of the output of the amplifying means by the frequency setting signal of the invention of claim 2 and the first filter circuit. And filter circuit switching means for selecting one of the second filter circuits having different cutoff frequencies. As a result, it is possible to obtain the effect of radiating an ultrasonic wave having a fundamental frequency of the resonance frequency of the ultrasonic transducer of the ultrasonic conductor attached to the output terminal and having less harmonic components.

According to the invention of claim 4, the first or second reference value selected by the reference value setting means and the second detecting means for detecting the impedance of the ultrasonic conductor. The output reduction means for comparing the output of the amplifier means with the output of the amplifier means is provided by the comparison means. Thus, the operator sets the reference value setting means according to the type of the acoustic wave coupler, and selects the first or second reference value to reflect two types of acoustic wave couplers having different characteristics. It is possible to obtain the effect that the overheat preventing function of the ultrasonic wave conductor can always be made to sufficiently work without being affected by the difference in the rate.

According to the fifth aspect of the present invention, the intermittent driving means and the continuous driving means drive the ultrasonic conductors alternately or intermittently in accordance with the time measured by the time measuring circuit. Therefore, it is possible to obtain the effect that the operator does not have to perform the switching operation of the ultrasonic wave emission method each time while watching the time, and the troublesomeness is eliminated.

[0077]

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an ultrasonic therapeutic device according to an embodiment of the present invention.

FIG. 2 is a diagram showing details of main blocks shown in FIG.

FIG. 3 is a flowchart of a main program of the controller 102 shown in FIG.

FIG. 4 is a flowchart of a subprogram of the controller 102 shown in FIG. 1, where (A) is a continuous mode subprogram, (B) is a pulse mode subprogram, and (C) is a program mode subprogram.

[Explanation of symbols]

1 ... Ultrasonic treatment device body, 2 ... Ultrasonic conductor, 102 ...
... controller, 103 ... oscillation circuit, 104 ... output mode setting circuit, 105 ... output control circuit, 106 ...
Current detection circuit, 107 ... Voltage detection circuit, 109 ... Impedance calculation circuit, 111 ... Comparison circuit, 114 ...
... switching circuit, 121 ... switch, 113 ... resistor,
202 ... resistor, 103b ... analog switch, 1
05s ... low pass filter, 105t ... low pass filter, 105r1 ... relay, 105r2 ... relay

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuo Ogiwara 1-23-15 Shirayama, Bunkyo-ku, Tokyo Ito Cho Shortwave Co., Ltd.

Claims (5)

[Claims] 1. A first ultrasonic conductor having a first ultrasonic transducer, and a second ultrasonic transducer having a second ultrasonic transducer having a resonance frequency different from that of the first ultrasonic transducer. An acoustic wave conductor, an output terminal to which any one of the first ultrasonic wave conductor and the second ultrasonic wave conductor is attached, an oscillation circuit that oscillates and outputs a high frequency signal, and an amplifier that amplifies the output of the oscillation circuit and An amplifying means for outputting to an output terminal, and an oscillation frequency of a high-frequency signal oscillated by the oscillation circuit is set to either the resonance frequency of the first ultrasonic transducer or the resonance frequency of the second ultrasonic transducer. An ultrasonic therapeutic device comprising: a frequency switching means for selectively switching. 2. The first ultrasonic conductor has a first resistor, and the second ultrasonic conductor has a second resistor having a resistance value different from that of the first resistor. The first resistor or the second resistor according to a detection value obtained according to a resistance ratio between the first resistor or the second resistor and a third resistor provided in advance. A resistance value detection circuit for detecting the resistance value of the resistor, and a frequency setting signal output means for outputting a frequency setting signal for switching the frequency switching means in accordance with the detection result of the resistance value detection circuit. The ultrasonic therapeutic device according to claim 1, wherein: 3. A first filter circuit for reducing the harmonic component of the output of the amplifying means, and a cutoff frequency different from that of the first filter circuit for reducing the harmonic component of the output of the amplifying means. A second filter circuit, and a filter circuit switching means for selecting one of the first filter circuit and the second filter circuit according to the frequency setting signal. Item 2. The ultrasonic therapeutic device according to item 2. 4. An ultrasonic conductor comprising an ultrasonic vibrator and a radiation surface for radiating ultrasonic waves generated by the ultrasonic vibrator, an oscillating circuit for oscillating and outputting a high frequency signal, Amplifying means for amplifying the output of the oscillation circuit and outputting it to the ultrasonic conductor, first detecting means for detecting values of voltage and current supplied to the ultrasonic conductor, and first detecting means. Which of the second detection means for detecting the impedance of the ultrasonic conductor based on the detection result of 1, the first reference value or the second reference value different from the first reference value is selected. A reference value setting means for setting, and the first and second selected by the reference value setting means.
Comparing means for comparing either one of the reference values of 1 and the output of the second detecting means and outputting a comparison result; and output reducing means for reducing the output of the amplifying means according to the output of the comparing means. An ultrasonic therapeutic device comprising: 5. An ultrasonic wave conductor having an ultrasonic wave oscillator, an intermittent driving means for intermittently driving the ultrasonic wave conductor, and a continuous driving means for continuously driving the ultrasonic wave conductor, An ultrasonic therapeutic device comprising: a time counting circuit; and a switching means for switching between the intermittent driving means and the continuous driving means according to the time counting time of the time counting circuit.