drive device

Abstract

The driving device (3) has: a first circuit (5) that connects an alternating-current power source (100) with a primary winding (351) that constitutes an output transformer (350); a second circuit (6) that has a pair of electrodes (600A, 600B) that are detachably connected with an ultrasonic treatment instrument (2) and a pair of output lines (610A, 610B) that connect a secondary winding (352) that constitutes the output transformer (350) with the pair of electrodes (600A, 600B); and a third circuit (7A) that has one end connected with the output line (610A) and the other end connected with a ground (GL). The third circuit (7A) has: an inductor (720A) that is a passive element; and capacitors (700A, 710A) that are passive elements and are connected in series with the inductor (720A).

Description

Technical Field

[0001] This invention relates to a driving device for driving ultrasonic treatment instruments. Background Technology

[0002] Previously, a treatment system was known that treats biological tissue by applying ultrasonic vibrations to it (see, for example, Patent Document 1).

[0003] The treatment system (ultrasonic treatment device) described in Patent Document 1 includes: an ultrasonic treatment instrument that applies ultrasonic vibrations to biological tissue; and a drive device (ultrasonic treatment device body) that supplies drive power to the ultrasonic treatment instrument for driving the ultrasonic treatment instrument.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2003-299666 Summary of the Invention

[0007] The problem the invention aims to solve

[0008] Furthermore, the drive unit of a medical device generally includes a drive circuit and a patient circuit, which are insulated from each other. Specifically, the drive circuit is the circuit that transmits and receives signals and supplies power to the patient circuit. The patient circuit is the circuit that transmits and receives signals and supplies power to the treatment device that contacts or inserts into the patient. The drive unit constituting the treatment system described in Patent Document 1 is also a medical device, and therefore includes the aforementioned drive circuit and patient circuit.

[0009] Furthermore, the treatment system described in Patent Document 1 (hereinafter referred to as the first treatment system) treats relatively soft biological tissues such as blood vessels. On the other hand, as another treatment system, a system that treats harder biological tissues such as bones (hereinafter referred to as the second treatment system) is also known. Moreover, in the second treatment system, compared with the first treatment system, since the treatment of hard tissues such as bones sometimes requires a higher output (voltage generated in the patient circuit) to the ultrasonic treatment device.

[0010] In this case, the higher the output to the ultrasound treatment device (the higher the voltage generated in the patient circuit), the higher the current leaked from the patient circuit (hereinafter referred to as patient leakage current).

[0011] Therefore, a technology is desired that can reduce patient leakage current even when the output to the treatment device is high.

[0012] The present invention was made in view of the above circumstances, and its object is to provide a drive device that can reduce patient leakage current even when the output to the treatment device is high.

[0013] Solution for solving the problem

[0014] To solve the aforementioned problems and achieve the objective, the driving device according to the present invention comprises: a first circuit having an AC power supply, a primary winding, and an input line, wherein the primary winding constitutes one winding of an output transformer, and the input line connects the primary winding to the AC power supply; a second circuit having a pair of electrodes, a secondary winding, and a pair of output lines, wherein the pair of electrodes are detachably connected to a processing device, the secondary winding constitutes the other winding of the output transformer, and the pair of output lines connect the pair of electrodes to the secondary winding; and a third circuit having one end connected to the output lines and the other end connected to ground, wherein the third circuit comprises: an inductor as a passive element; and a capacitor as a passive element connected in series with the inductor.

[0015] Furthermore, the driving device involved in this invention is a driving device for driving an ultrasonic treatment instrument. This driving device comprises: a first circuit having an AC power supply, a primary winding, and an input line, wherein the primary winding constitutes one winding of an output transformer, and the input line connects the primary winding to the AC power supply; a second circuit having a pair of electrodes, a secondary winding, and a pair of output lines, wherein the pair of electrodes are detachably connected to the ultrasonic treatment instrument, the secondary winding constitutes the other winding of the output transformer, and the pair of output lines connect the pair of electrodes to the secondary winding; and a third circuit, one end of which is connected to the output lines and the other end to ground, wherein the third circuit comprises: a first passive element that significantly reduces the parasitic capacitance of the driving device; and a second passive element connected in series with the first passive element to treat the second circuit as insulated from ground.

[0016] The effects of the invention

[0017] According to the drive device of the present invention, even when the output to the ultrasonic treatment device is high, the leakage current to the patient can be reduced. Attached Figure Description

[0018] Figure 1 This is a diagram showing the outline structure of the processing system involved in the implementation.

[0019] Figure 2 This is a block diagram showing the circuit structure of the ultrasonic treatment device and its driving mechanism.

[0020] Figure 3 This is a diagram illustrating the function of the third circuit.

[0021] Figure 4 This is a diagram illustrating the function of the third circuit.

[0022] Figure 5 This is a diagram illustrating the effects of the implementation method.

[0023] Figure 6 This is a diagram illustrating a variation of the implementation method.

[0024] Figure 7 This is a diagram illustrating a variation of the implementation method.

[0025] Figure 8 This is a diagram illustrating a variation of the implementation method.

[0026] Figure 9 This is a diagram illustrating a variation of the implementation method.

[0027] Figure 10 This is a diagram illustrating a variation of the implementation method.

[0028] Figure 11 This is a diagram illustrating a variation of the implementation method. Detailed Implementation

[0029] Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described below. Furthermore, in the accompanying drawings, the same reference numerals are used for the same parts.

[0030] [Overview structure of the disposal system]

[0031] Figure 1 This is a diagram showing the outline structure of the processing system 1 according to this embodiment.

[0032] Treatment system 1 treats biological tissues such as bone by applying ultrasonic vibrations. Here, treatment refers, for example, to the removal or cutting of biological tissues such as bone. Furthermore, in... Figure 1 In this example, as the treatment system 1, a treatment system is shown in which the tip of the probe 22 constituting the ultrasonic treatment device 2 is inserted into the joint cavity C1 of the knee joint J1 to perform anterior cruciate ligament (ACL) reconstruction.

[0033] like Figure 1 As shown, the treatment system 1 includes an ultrasonic treatment device 2, a drive device 3, and a foot switch 4.

[0034] like Figure 1As shown, the ultrasonic treatment device 2 includes a treatment device body 21, a probe 22, a sheath 23, a cable 24, and a connector 25.

[0035] The main body 21 of the treatment device is cylindrical. Furthermore, an ultrasonic transducer 210 (see reference) consisting of a bolt-clamped Langevin-type transducer is housed inside the main body 21. Figure 2 ) and the drive energy input unit 200 for driving the ultrasonic transducer 210 (see reference) Figure 2 ).

[0036] The probe 22 is formed into a generally cylindrical shape. Furthermore, the base end of the probe 22 is connected to the main body 21 of the treatment device. In addition, a treatment section 22a is provided at the front end of the probe 22.

[0037] The sheath 23 is formed into a cylindrical shape that is longer and thinner than the main body 21 of the treatment device, and the sheath 23 covers a portion of the outer periphery of the probe 22 in such a way that it covers a portion of the outer periphery of the probe 22 from the main body 21 of the treatment device to any length.

[0038] The base of the cable 24 is electrically connected to the drive power input section 200 inside the main body 21 of the treatment device. In addition, a connector 25 is connected to the front end of the cable 24.

[0039] The drive unit 3 has a rectangular housing 30. Figure 1 Furthermore, multiple electronic components constituting electronic circuits are housed inside the housing 30.

[0040] Connector 32, power switch 33, two operation switches 34 and 35, and display panel 36 are provided in an exposed state on the front surface portion 31 constituting the front surface of housing 30. Connector 25 of cable 24 of ultrasonic treatment device 2 is detachably connected to connector 32. Furthermore, when connector 25 is connected to connector 32, power supply and control signal communication between ultrasonic treatment device 2 and drive device 3 are conducted via cable 24.

[0041] In the treatment system 1 according to this embodiment, in response to the start output operation performed by the surgical operator on the foot switch 4, drive power is supplied from the drive device 3 to the ultrasonic treatment device 2. Furthermore, the ultrasonic treatment device 2 generates ultrasonic vibrations, which are applied to biological tissues such as bone from the treatment section 22a of the probe 22. Thus, the biological tissues such as bone are treated.

[0042] [Circuit structure of ultrasonic treatment equipment and driving device]

[0043] Figure 2 This is a block diagram showing the circuit structure of the ultrasonic treatment device 2 and the driving device 3.

[0044] like Figure 2 As shown, the ultrasonic treatment device 2 includes a drive energy input unit 200, an ultrasonic transducer 210, and a memory 220. On the other hand, the drive device 3 includes a drive control unit 300, buffer circuits 310A and 310B, switch circuits 320A and 320B, low-pass filters 330A and 330B, a common-mode coil 340, an output transformer 350, an operation control unit 360, optical switches 370A and 370B, and a memory 380.

[0045] Next, the structure of the ultrasonic treatment device 2 and the drive device 3 described above will be explained together with the explanation of the operation of the drive device 3.

[0046] When the surgical operator initiates the output operation by pressing the foot switch 4, a signal is input from the operation control unit 360 to the drive control unit 300. In response to this signal input, the drive control unit 300 controls the relay circuit 620 via the optical switch 370A. Figure 2 The relay circuit 620 is switched on by the operation of the relay. Furthermore, the drive control unit 300, in response to the input signal, functions as a drive signal generator, generating a drive signal for driving the ultrasonic treatment device 2 based on power from the power supply 100. The drive control unit 300 then outputs this drive signal to the switch circuits 320A and 320B after passing it through buffer circuits 310A and 310B, respectively. Here, buffer circuits 310A and 310B are provided to reduce the load on the drive control unit 300 and improve the switching efficiency of the switch circuits 320A and 320B.

[0047] A high-side switching element 321HA and a low-side switching element 321LA are provided in switching circuit 320A. Similarly, a high-side switching element 321HB and a low-side switching element 321LB are provided in switching circuit 320B. Furthermore, in the following description, unless specifically distinguished, the four switching elements 321HA, 321HB, 321LA, and 321LB will be simply referred to as switching element 321. Additionally, a field-effect transistor (FET) can be used, for example, as switching element 321.

[0048] In the switching circuits 320A and 320B, based on the drive signals output from the buffer circuits 310A and 310B, the respective high-side switching elements 321HA and 321HB and low-side switching elements 321LA and 321LB are alternately switched on and off at a frequency higher than the drive frequency of the ultrasonic transducer 210.

[0049] Then, the outputs from switching circuits 320A and 320B are passed through low-pass filters 330A and 330B and the common-mode coil 340, respectively, before being input to the primary winding 351 of one of the windings constituting the output transformer 350. At this time, the outputs from switching circuits 320A and 320B are converted into a sinusoidal drive signal (hereinafter referred to as the ultrasonic drive signal) by the low-pass filters 330A and 330B. Here, the common-mode coil 340 functions as a noise filter to reduce the noise contained in the ultrasonic drive signal.

[0050] The above-described invention comprises a power supply 100 functioning as an AC power source, a primary winding 351, an input line 500 connecting the primary winding 351 to the power supply 100, a drive control unit 300 disposed on the input line 500, buffer circuits 310A and 310B, switching circuits 320A and 320B, low-pass filters 330A and 330B, and a common-mode coil 340, constituting the first circuit 5 of the invention. Figure 2 ).

[0051] When a sinusoidal ultrasonic drive signal is input to the primary winding 351, an ultrasonic drive signal, boosted to a voltage higher than that of the primary winding 351, is output to the secondary winding 352, which constitutes the other winding of the output transformer 350. This ultrasonic drive signal is AC power generated within the second circuit 6 (described later) and output to the ultrasonic treatment device 2. In this embodiment, the ultrasonic drive signal is a relatively high AC power of 100W or more and 400W or less.

[0052] Here, as Figure 2 As shown, connector 32 is provided with a pair of electrodes 600A and 600B that are electrically connected to drive power input unit 200 via cable 24 when connector 32 is connected to connector 25. In addition, secondary winding 352 is connected to the pair of electrodes 600A and 600B via a pair of output lines 610A and 610B respectively.

[0053] The pair of electrodes 600A and 600B, the secondary winding 352, and the pair of output lines 610A and 610B described above constitute the second circuit 6 involved in this invention. Figure 2 This second circuit 6 is also known as the so-called patient circuit. That is, the second circuit 6 is a circuit that is insulated from the first circuit 5 and also from ground via the output transformer 350. Additionally, as... Figure 2 As shown, the second circuit 6 in this embodiment also includes a relay circuit 620, a matching coil 630, and a noise response component 640.

[0054] A relay circuit 620 is provided on the output line 610A. Furthermore, under the control of the drive control unit 300, the relay circuit 620 switches between an on state, which connects the secondary winding 352 to the pair of electrodes 600A and 600B, and an off state, which de-connects the secondary winding 352 to the pair of electrodes 600A and 600B. That is, when the relay circuit 620 is on, the ultrasonic drive signal output to the secondary winding 352 is transmitted to the pair of electrodes 600A and 600B via the pair of output lines 610A and 610B. On the other hand, when the relay circuit 620 is off, the ultrasonic drive signal output to the secondary winding 352 is not transmitted to the pair of electrodes 600A and 600B via the pair of output lines 610A and 610B.

[0055] The matching coil 630 is configured to connect a pair of output lines 610A and 610B for efficiently driving the ultrasonic transducer 210. In this embodiment, the matching coil 630 is located closer to the secondary winding 352 than the relay circuit 620, but its location is not limited to this and can be located in other positions.

[0056] The noise mitigation component 640, for example, is made of a ferrite core and is located closer to the pair of electrodes 600A and 600B than the relay circuit 620 and the matching coil 630. Furthermore, the noise mitigation component 640 is designed to prevent unwanted noise from being output from the pair of electrodes 600A and 600B from affecting external equipment located near the proximity handling system 1.

[0057] In addition, such as Figure 2 As shown, in this embodiment, a pair of output lines 610A and 610B are respectively connected to the third circuit 7A and 7B.

[0058] Furthermore, the structure and function of the third circuits 7A and 7B will be explained in the sections on "Structure of the Third Circuit" and "Function of the Third Circuit" described later.

[0059] The ultrasonic drive signal output to the secondary winding 352 is transmitted to the drive energy input unit 200 via the second circuit 6, connector 25, and cable 24. Furthermore, the drive energy input unit 200, in response to the input of the ultrasonic drive signal, causes the ultrasonic transducer 210 to vibrate ultrasonically.

[0060] Furthermore, the drive control unit 300 connects to the memory 220 of the ultrasonic treatment device 2 via an optical switch 370B. By reading the ID information of the ultrasonic treatment device 2 stored in the memory 220, the drive control unit 300 determines the type of the ultrasonic treatment device 2. Based on the information stored in the memory 380, the drive control unit 300 sets drive parameters (basic frequency, current value, maximum continuous output time, etc.) corresponding to the determined type of the ultrasonic treatment device 2. Moreover, the drive control unit 300 generates a drive signal based on feedback results of the voltage and current of the ultrasonic drive signal.

[0061] Additionally, the drive control unit 300 displays the magnitude of the ultrasonic drive signal output from the drive unit 3 to the ultrasonic treatment device 2 on the display panel 36. Furthermore, the magnitude of the ultrasonic drive signal output from the drive unit 3 to the ultrasonic treatment device 2 can be adjusted by operating the foot switch 4, operation switches 34, 35, etc.

[0062] [Structure of the third circuit]

[0063] Next, refer to Figure 2 To illustrate the structure of the third circuit 7A and 7B.

[0064] One end of the third circuit 7A is electrically connected to the output line 610A, and the other end is electrically connected to ground GL. In this embodiment, one end of the third circuit 7A is connected to the portion of the output line 610A near the secondary winding 352 of the relay circuit 620, the matching coil 630, and the noise response component 640. The third circuit 7A has a structure in which capacitors 700A and 710A, which are passive components, and an inductor 720A, which is also a passive component, are connected in series. In this embodiment, the capacitors 700A and 710A and the inductor 720A are arranged in the order of capacitors 700A and 710A and inductor 720A along the direction from the output line 610A to ground GL.

[0065] Here, inductor 720A corresponds to the first passive element involved in this invention. Additionally, capacitors 700A and 710A correspond to the second passive element involved in this invention.

[0066] One end of the third circuit 7B is electrically connected to the output line 610B, and the other end of the third circuit 7B is electrically connected to ground GL. In this embodiment, one end of the third circuit 7B is connected to the portion of the output line 610B near the secondary winding 352 of the matching coil 630 and the noise response component 640. The third circuit 7B has a structure in which capacitors 700B and 710B, which are passive components, and an inductor 720B, which is also a passive component, are connected in series. In this embodiment, the capacitors 700B and 710B and the inductor 720B are arranged in the order of capacitors 700B and 710B and inductor 720B along the direction from the output line 610B to ground GL.

[0067] Here, inductor 720B corresponds to the first passive element involved in this invention. Additionally, capacitors 700B and 710B correspond to the second passive element involved in this invention.

[0068] In this embodiment, the capacitances of capacitors 700A, 710A, 700B, and 710B are 1pF or more and 100nF or less, respectively.

[0069] The third circuits 7A and 7B described above are connected to a pair of output lines 610A and 610B in a structurally paired manner. Here, "structurally paired" means that the number of capacitors (two in this embodiment), the number of inductors (one in this embodiment), and the arrangement order of the capacitors and inductors from the output lines 610A and 610B to ground GL are the same between the third circuits 7A and 7B. That is, the capacitance of the capacitors and the inductance of the inductors between the third circuits 7A and 7B can also be different.

[0070] [Function of the third circuit]

[0071] Figure 3 and Figure 4 This is a diagram illustrating the functions of the third circuit 7A and 7B.

[0072] Next, refer to Figure 3 and Figure 4 This will explain the functions of the third circuits 7A and 7B.

[0073] Furthermore, the current leaking from the second circuit 6 (hereinafter referred to as patient leakage current) depends on the parasitic capacitance of components such as the output transformer 350 used for insulation of the second circuit 6, and the parasitic capacitance generated by the circuit pattern. That is, the patient leakage current becomes higher as the parasitic capacitance increases. In addition, the patient leakage current needs to be measured in the second circuit 6, and the patient leakage current becomes higher as the value of the ultrasonic drive signal (AC power) output to the ultrasonic treatment device 2 increases.

[0074] Furthermore, the inductors 720A and 720B constituting the third circuits 7A and 7B have the function of reducing the patient leakage current by significantly reducing the parasitic capacitance mentioned above.

[0075] Specifically, with the imaginary unit set as j, the angular frequency of the AC circuit set as ω, and the capacitance set as C, the impedance Z of the parasitic capacitance (capacitor component) is represented by 1 / jωC. C That is, the impedance Z C Is it like this? Figure 3 The downward-pointing vector in the complex plane, as indicated by the arrow.

[0076] On the other hand, with the imaginary unit set as j, the angular frequency of the AC signal set as ω, and the inductance set as L, the impedance Z of inductors 720A and 720B can be represented by jωL. L That is, the impedance Z L Is it like this? Figure 4 The upward-pointing vector in the complex plane, as indicated by the arrow.

[0077] Therefore, by setting inductors 720A and 720B, the effects of the parasitic capacitance (capacitor component) mentioned above can be offset (the parasitic capacitance can be significantly reduced), and as a result, the patient leakage current can be reduced.

[0078] In addition, capacitors 700A and 710A constituting the third circuit 7A are used to make the second circuit 6 and ground GL considered as insulated.

[0079] According to the above-described implementation method, the following effects are achieved.

[0080] Figure 5 This is a diagram illustrating the effects of this embodiment. Specifically, Figure 5 This is a graph where the horizontal axis represents the value of the ultrasonic drive signal (AC power) generated in the second circuit 6 and output to the ultrasonic treatment device 2, and the vertical axis represents the value of the patient leakage current measured in the output lines 610A and 610B. Additionally, in Figure 5In the diagram, line L1 represents the relationship between the ultrasonic drive signal output to the ultrasonic treatment device 2 and the patient leakage current when, unlike this embodiment, inductors 720A and 720B are omitted from the third circuits 7A and 7B, while capacitors 700A, 710A, 700B, and 710B remain. Line L2 represents the same relationship when, unlike this embodiment, the third circuits 7A and 7B are not provided. Line L3 represents the same relationship when the third circuits 7A and 7B are provided as in this embodiment. Line L4 represents the same relationship when, unlike this embodiment, capacitors 700A, 710A, 700B, and 710B are omitted from the third circuits 7A and 7B, while inductors 720A and 720B remain.

[0081] like Figure 5 As shown in line L1, when inductors 720A and 720B are omitted from the third circuits 7A and 7B and capacitors 700A, 710A, 700B, and 710B are left, the value of the patient leakage current exceeds the specification value S1 specified by the safety specifications before the value of the ultrasonic drive signal output to the ultrasonic treatment device 2 becomes 100W.

[0082] In addition, such as Figure 5 As shown by line L2, without the third circuits 7A and 7B, as long as the value of the ultrasonic drive signal generated in the second circuit 6 and output to the ultrasonic treatment device 2 is less than 100W, the patient leakage current can be kept below the specification value S1 stipulated by the safety specifications. However, when the value of the ultrasonic drive signal output to the ultrasonic treatment device 2 is 100W or more, as in this embodiment where the treatment target is a harder biological tissue such as bone, the patient leakage current exceeds the specification value S1.

[0083] In this embodiment, third circuits 7A and 7B are provided. Therefore, as... Figure 5 As shown in line L3, even when the value of the ultrasonic drive signal output to the ultrasonic treatment device 2 is 100W or more, the value of the patient leakage current can be set to below the specified value S1.

[0084] Therefore, according to the drive device 3 of this embodiment, even when the output to the ultrasonic treatment device 2 is high, the leakage current to the patient can be reduced.

[0085] Furthermore, it can be said that the same applies when the value of the ultrasonic drive signal output to the ultrasonic treatment device 2 is below 400W.

[0086] Furthermore, by incorporating passive components in the third circuits 7A and 7B, patient leakage current can be sufficiently reduced with a simple structure. Unlike active components, passive components reduce patient leakage current without active control. Therefore, patient leakage current can be reduced with a simple structure by matching the values ​​of the passive components during the assembly of the drive device 3. The constants of the passive components are determined by considering the output and circuit structure. For example, in the case of a circuit structure with an output of 200W in this embodiment, it is sufficient to set the capacitor to 1nF and the inductor to 150mH.

[0087] Furthermore, passive components have fewer parts, which can reduce patient leakage current at a lower cost. In addition, since passive components save space, the drive device 3 can be miniaturized.

[0088] (Other implementation methods)

[0089] So far, methods for implementing the present invention have been described, but the present invention should not be limited to the embodiments described above.

[0090] Figures 6-8 This is a diagram illustrating a variation of this embodiment.

[0091] In the third circuit of this invention, the arrangement order of the inductors and capacitors is not limited to the arrangement order described in the above embodiments, and other arrangement orders may also be used.

[0092] Figure 6 The example shown is an example of changing the arrangement order of inductor 720A and capacitors 700A and 710A in the third circuits 7A and 7B described in the above embodiments, and similarly changing the arrangement order of inductor 720B and capacitors 700B and 710B.

[0093] Furthermore, in the third circuit involved in this invention, the number of inductors and capacitors is not limited to the above-mentioned number, and other numbers may also be used.

[0094] Figure 7 The example shown is an example from the above-described embodiment where the third circuits 7A and 7B omit capacitors 710A and 710B. In this case, fewer capacitors are used, resulting in fewer components, making the circuit cheaper, and shortening the circuit pattern.

[0095] In the above embodiments, the third circuit involved in the present invention is connected to a pair of output lines 610A and 610B respectively, but it is not limited thereto, and one of the pair of output lines 610A and 610B may be omitted.

[0096] Figure 8The example shown is an example with only the third circuit 7B. This structure allows for adjustment when the patient leakage current is biased to one side of the output line. Furthermore, fewer capacitors and inductors are used compared to the embodiments described above, resulting in fewer components, lower cost, and a shorter circuit diagram.

[0097] In the above-described embodiments, the structure shown below can also be adopted.

[0098] Reference Figures 9-11 This section describes the housing used to house the circuitry of the present invention. Specifically, Figure 9 This is a perspective view of the drive unit 3 viewed from the front (front surface 31 side). Figure 10 This is an exploded perspective view of the housing 30 that constitutes the drive device 3. Figure 11 This is a perspective view of the support member 38 as seen from the front of the housing 30.

[0099] like Figure 9 or Figure 10 As shown, the front surface portion 31 includes a front panel 31a. Figure 10 ) and front panel cover 31b.

[0100] The front panel 31a is a rectangular plate when viewed from the front surface. Furthermore, the front panel 31a is equipped with a connector 32, a power switch 33, two operation switches 34 and 35, and a display panel 36.

[0101] like Figure 10 As shown, a gasket 31c is installed at the upper end of the front panel 31a, extending along its entire length. When the U-shaped top cover 37, which forms the upper surface and a pair of sides of the housing 30, is fitted onto the front panel 31a, the gasket 31c abuts against the inner surface of the top cover 37. This eliminates any gap between the front panel 31a and the top cover 37, thereby improving water resistance.

[0102] Here, as Figure 11 As shown, the display panel 36 is supported by the support member 38 on one side and assembled to the front panel 31a on the other side.

[0103] The support member 38 includes: a rectangular frame 38a surrounding the outer edge of the display panel 36; and four legs 38b, which protrude from the four corners of the frame 38a toward the rear side and are mounted on the front surface of the front panel 31a. Furthermore, in Figure 11 For ease of explanation, only one of the two lower legs 38bD of the four legs 38b is shown in the figure.

[0104] Here, the protruding lengths of the two upper legs 38bU of the four legs 38b are shorter than the protruding lengths of the two lower legs 38bD. That is, when the support member 38 is mounted on the front surface of the front panel 31a, the display panel 36 is tilted forward as it tends to move downward. Thus, even if the waterproof strip 31i is damaged, a structure can be achieved that allows liquids such as medicine to flow only in a fixed direction (the bottom surface side of the housing 30). Furthermore, although specific illustrations are omitted, the circuit board is not provided at the destination of the liquid flow. That is, the circuit board is prevented from getting wet.

[0105] The front panel cover 31b, when viewed from the front surface, is composed of a rectangular plate that covers the front surface of the front panel 31a. Furthermore, the front panel cover 31b is provided with openings 31d to 31h for exposing the connector 32, the power switch 33, the two operation switches 34 and 35, and the display panel 36 to the outside.

[0106] A rectangular waterproof strip 31i is installed around the opening 31h on the back of the front panel cover 31b, which exposes the display panel 36 to the outside. When the front panel cover 31b is assembled to the front panel 31a, the waterproof strip 31i abuts against the front surface of the support member 38 used to fix the display panel 36. This eliminates any gap between the front panel cover 31b and the support member 38 that fixes the display panel 36, thereby improving waterproofing.

[0107] In addition, by making the front panel cover 31b abut against the support member 38 with a waterproof strip 31i in between, even if the support member 38 expands or contracts due to temperature changes, the deformation will be absorbed by the waterproof strip 31i, so that the front panel cover 31b will not deform.

[0108] Explanation of reference numerals in the attached figures

[0109] 1: Treatment system; 2: Ultrasonic treatment device; 3: Drive unit; 4: Foot switch; 5: First circuit; 6: Second circuit; 7A, 7B: Third circuit; 21: Main body of the treatment device; 22: Probe; 22a: Treatment part; 23: Sheath; 24: Cable; 25: Connector; 30: Housing; 31: Front surface; 31a: Front panel; 31b: Front panel cover; 31c: Gasket; 31d-31h: Opening; 31i: Waterproof strip; 32: Connector; 33: Power switch; 34, 35: Operation switch; 36: Display panel; 37: Top cover; 38: Support member; 38b, 38bU, 38bD: Legs; 100: Power supply; 200: Drive energy input part; 210: Ultrasonic transducer; 220: Memory; 300: Drive unit; Dynamic control unit; 310A, 310B: Buffer circuit; 320A, 320B: Switching circuit; 321HA: High-side switching element; 321LA: Low-side switching element; 330A, 330B: Low-pass filter; 340: Common-mode coil; 350: Output transformer; 351: Primary winding; 360: Operation control unit; 370A, 370B: Optical switch; 380: Memory; 600A, 600B: Electrode; 610A, 610B: Output line; 620: Relay circuit; 630: Matching coil; 640: Noise response component; 700A, 710A, 700B, 710B: Capacitor; 720A, 720B: Inductor; C1: Joint cavity; GL: Ground; J1: Knee joint; L1~L4: Line; S1: Specification value.

Claims

1. A driving device comprising: A first circuit has an AC power supply, a primary winding, and an input line. The primary winding forms one winding of an output transformer, and the input line connects the primary winding to the AC power supply. A second circuit has a pair of electrodes, a secondary winding, a pair of output lines, and a matching coil. The pair of electrodes are detachably connected to an ultrasonic treatment device. The secondary winding forms the other winding of the output transformer. The pair of output lines connect the pair of electrodes to the secondary winding. The third circuit has one end connected to the output line and the other end connected to ground. in, The third circuit has: Inductors as passive components; and The capacitor, as a passive component, is connected in series with the inductor. A pair of the third circuits is provided, and the pair of third circuits are respectively connected to the pair of output lines. One of the third circuits is configured between the matching coil and the secondary winding.

2. The driving device according to claim 1, characterized in that, The third circuit has two or more capacitors connected in series.

3. The driving device according to claim 1, characterized in that, The capacitance of the capacitor is above 1pF and below 100nF.

4. The driving device according to claim 1, characterized in that, The AC power generated in the second circuit and output to the ultrasonic treatment device is 100W or more and 400W or less.

5. A driving device for driving an ultrasonic treatment apparatus, the driving device comprising: A first circuit has an AC power supply, a primary winding, and an input line. The primary winding forms one winding of an output transformer, and the input line connects the primary winding to the AC power supply. The second circuit has a pair of electrodes, a secondary winding, a pair of output lines and a matching coil. The pair of electrodes are detachably connected to the ultrasonic treatment device. The secondary winding forms the other winding of the output transformer. The pair of output lines connect the pair of electrodes to the secondary winding. as well as The third circuit has one end connected to the output line and the other end connected to ground. The third circuit has the following features: The first passive component significantly reduces the parasitic capacitance of the drive device; and A second passive component, connected in series with the first passive component, is used to treat the second circuit as an insulator to the ground. A pair of the third circuits is provided, and the pair of third circuits are respectively connected to the pair of output lines. One of the third circuits is configured between the matching coil and the secondary winding.

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