Power supply device

Abstract

Provided is a power supply device in which a shaft provided with a power receiving unit is inserted through the inside of a puncture cannula, the power supply device being capable of supplying current to the power receiving unit at low cost. In this power supply device (1), ring-side terminals (4A, 4B) can be brought into contact with shaft-side terminals (8A, 8B) as a shaft (6) is inserted into a power supply ring (14) and into a puncture cannula (2). In a state in which the ring-side terminals (4A, 4B) are in contact with the shaft-side terminals (8A, 8B), power from a power source can be supplied to the power receiving unit (7) via the ring-side power supply lines (5A, 5B), the ring-side terminals (4A, 4B), the shaft-side terminals (8A, 8B), and the shaft-side power supply lines (9A, 9B).

Description

Technical Field

[0001] The present invention relates to a power supply device capable of supplying electric power to a power receiving portion provided on a shaft to which a surgical instrument such as a microwave forceps is attached, as the shaft is inserted into a puncture cannula. Background Art

[0002] In recent years, as most surgical procedures have shifted toward robot-assisted and endoscopic surgery, surgical instruments with shafts for performing internal surgeries have been used. These instruments consist of a puncture cannula, which is inserted through a through-hole in the cannula and inserted into the body. Microwaves are emitted from the shaft's tip to cauterize the bleeding site.

[0003] In order to directly supply microwaves to the shaft of the above-mentioned instruments, a thick and rigid coaxial cable is connected to the shaft. Therefore, when multiple such instruments are used during surgery, the multiple coaxial cables become entangled in the space above the operating table, which is an extremely troublesome problem.

[0004] In particular, when using 2.45GHz microwaves, which are essential for surgery, approximately 50W of microwaves must be applied to the surgical site. Therefore, a coaxial cable, at least 2m long, is typically routed from an external microwave power source to supply 50W of power to the instrument's distal end. Furthermore, due to the high transmission losses of microwaves in this case, a coaxial cable with a diameter of approximately 10mm is used for this wiring. While somewhat flexible, microwave coaxial cables are quite rigid, making it difficult to manipulate the shaft while pulling the coaxial cable and also raising concerns about patient safety.

[0005] Furthermore, as devices that do not require the above-mentioned coaxial cables, high-frequency devices with built-in batteries have been proposed in recent years. However, it has been pointed out that the battery life, weight, and size do not meet the required levels.

[0006] In addition, in recent years, some people have proposed surgical instruments that connect a coaxial cable to a puncture cannula instead of to a shaft. For example, in the surgical instrument disclosed in Patent Document 1, high-frequency power is supplied from a power supply device to the puncture cannula (trocar) via a coaxial cable, and the power supplied to the puncture cannula (trocar) is wirelessly supplied to the shaft. However, in the instrument of Patent Document 1, in order to achieve the above-mentioned wireless power supply, not only is it necessary to provide a power supply coil on the puncture cannula (trocar) and a power receiving coil on the shaft, but also a complex mechanism for sliding the shaft is required to maintain the power supply coil and the power receiving coil in a state of facing each other. Therefore, the surgical instrument of Patent Document 1 is considered to have high manufacturing costs and difficult to be applied as a disposable product.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: Japanese Patent Application Laid-Open No. 2015-123117 Summary of the Invention

[0010] Problems to be solved by the invention

[0011] The present invention has been made in view of the above problems, and its object is to provide a power supply device in which a shaft provided with a power receiving portion is inserted through a puncture cannula, and the power supply device can supply current to the power receiving portion at low cost.

[0012] Means used to solve problems

[0013] In order to achieve the above objectives, the present invention includes the following subjects recorded in the technical solutions.

[0014] Item 1. A power supply comprising: The puncture cannula is formed of an insulating material and is cylindrical; a power supply ring formed of an insulating material; a ring-side terminal, provided on the inner surface of the power supply ring; a ring-side power supply line, connecting the ring-side terminal to a power source; The shaft is inserted into the interior of the power supply ring and the interior of the puncture sleeve in sequence; a power receiving portion, disposed on the shaft; a shaft-side terminal, disposed on the outer surface of the shaft; and A shaft-side power supply line is provided on the shaft and connects the power receiving unit to the shaft-side terminal. Wherein, as the shaft is inserted into the interior of the power supply ring and the interior of the puncture sleeve, the ring side terminal can be brought into contact with the shaft side terminal. When the ring-side terminal is in contact with the shaft-side terminal, electric power from the power supply can be supplied to the power receiving unit via the ring-side power supply line, the ring-side terminal, the shaft-side terminal, and the shaft-side power supply line.

[0015] Item 2. The power supply according to Item 1, wherein the shaft includes a shaft body and a cylindrical piece, the shaft body is provided with the power receiving portion, the cylindrical piece covers the outside of the shaft body, and the shaft-side terminal is provided on the outer surface of the cylindrical piece. A first connector and a first shaft-side power supply line are provided on the shaft body, and the first shaft-side power supply line connects the power receiving unit to the first connector; a second connector and a second shaft-side power supply line are provided on the cylindrical piece, and the second shaft-side power supply line connects the shaft-side terminal to the second connector; by connecting the first connector and the second connector, the power receiving unit can be connected to the shaft-side terminal via the first shaft-side power supply line, the first connector, the second connector, and the second shaft-side power supply line. When the first connector and the second connector are connected, as the shaft is inserted into the interior of the power supply ring and the interior of the puncture cannula, the ring side terminal and the shaft side terminal are brought into contact, thereby enabling power from the power supply to be supplied to the power receiving part via the ring side power supply line, the ring side terminal, the shaft side terminal, the second shaft side power supply line and the first shaft side power supply line.

[0016] Item 3. The power supply according to Item 1 or 2, comprising a cylindrical body extending from one end of the puncture cannula, The cylindrical body is formed of an insulating material and comprises a connecting ring, the power supply ring, and a cylindrical body; the connecting ring is mounted on one end of the puncture cannula or is integrally formed with one end of the puncture cannula, thereby being connected to the one end of the puncture cannula; the cylindrical body connects the connecting ring and the power supply ring; The cylindrical body is formed of a retractable insulating material, and the shaft is sequentially inserted into the interior of the cylindrical body and the interior of the puncture cannula. As the shaft is inserted through the interior of the cylindrical body and the interior of the puncture sleeve, the grooves of one of the puncture sleeve side terminal and the shaft side terminal are engaged with the other, thereby enabling the ring side terminal to contact the shaft side terminal. In a state where the ring-side terminal is in contact with the shaft-side terminal, the cylindrical body expands and contracts as the shaft moves.

[0017] Item 4. The power supply according to Item 3, wherein the cylindrical body has a shape in which the diameter decreases toward the power supply ring side.

[0018] Item 5. The power supply according to Item 1, comprising a winding ring formed of an insulating material, The winding ring is connected to one end of the puncture cannula and can be used to wind the ring-side power supply line. The shaft is sequentially inserted into the interior of the power supply ring, the winding ring and the interior of the puncture sleeve.

[0019] Effects of the Invention

[0020] The power supply of the present invention supplies power to the power receiving unit through a simple mechanism that connects the power supply line (ring-side power line and ring-side terminals) on the power source side with the power supply line (shaft-side terminals and shaft-side power line) on the power receiving unit side through contact between the ring-side terminals and the shaft-side terminals. Therefore, the power supply of the present invention can supply power to the power receiving unit at a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram showing a usage state of the power supply according to the embodiment of the present invention.

[0022] Figure 2 1 and 2 are views showing a power supply according to an embodiment of the present invention, wherein sub-view (A) is a schematic side view of the power supply, and sub-view (B) is a schematic longitudinal sectional view of the power supply.

[0023] Figure 3 It means using Figure 2 The cross-sectional view of the sub-figure (A) shows the state where the AA line cuts off the power supply.

[0024] Figure 4 It means using Figure 2 The cross-sectional view of sub-figure (A) shows the state where the BB line of the power supply is cut off.

[0025] Figure 5 It is a schematic longitudinal sectional view showing a part of the power supply.

[0026] Figure 6 The sub-figure (A) is a schematic cross-sectional view of a power supply ring of the power supply, and the sub-figure (B) is a schematic cross-sectional view of a shaft of the power supply.

[0027] Figure 7 It is a diagram of a power supply according to an embodiment of the present invention, wherein sub-diagram (A) is a schematic cross-sectional view of the power supply showing a state in which the cylindrical body is extended, and sub-diagram (B) is a schematic cross-sectional view of the power supply showing a state in which the cylindrical body is contracted.

[0028] Figure 8 1 and 2 are views showing a power supply according to a modified example of the present invention, wherein sub-view (A) is a schematic side view of the power supply, and sub-view (B) is a schematic longitudinal sectional view of the power supply.

[0029] Figure 9 It is a diagram of a power supply of a modified example of the present invention, wherein sub-diagram (A) is a schematic cross-sectional view of the power supply showing a state in which the cylindrical body is extended, and sub-diagram (B) is a schematic cross-sectional view of the power supply showing a state in which the cylindrical body is contracted.

[0030] Figure 101 and 2 are views showing a power supply according to a modified example of the present invention, wherein sub-view (A) is a schematic side view of the power supply, and sub-view (B) is a schematic longitudinal sectional view of the power supply.

[0031] Figure 11 The figure shows a power supply according to a modified example of the present invention, wherein sub-figure (A) shows a state where the ring-side power supply wire is wound around the winding ring a small number of times, and sub-figure (B) shows a state where the ring-side power supply wire is wound around the winding ring a large number of times.

[0032] Figure 12 1 and 2 are views showing a power supply according to a modified example of the present invention, wherein sub-view (A) is a schematic side view of the power supply, and sub-view (B) is a schematic longitudinal sectional view of the power supply.

[0033] Figure 13 yes Figure 12 Sub-figure (B) is an enlarged view of range A. DETAILED DESCRIPTION

[0034] Next, refer to the attached Figure 1 Embodiments of the present invention will be described. Figure 1 Schematic diagram showing the state of use of the power supply 1. Figure 2 1 and 2 are views showing a power supply 1 according to an embodiment of the present invention. FIG. 1 is a schematic side view of the power supply 1 , and FIG. 1 is a schematic longitudinal sectional view of the power supply 1 . Figure 3 It means using Figure 2 The AA line of the sub-figure (A) is a schematic cross-sectional view of the power supply 1. Figure 4 It means using Figure 2 The BB line of sub-figure (A) provides a schematic cross-sectional view of the state of the electrical appliance 1. Figure 5 It is a schematic longitudinal sectional view showing a part of the power supply 1 .

[0035] The power supply 1 of this embodiment is used for the subject H ( Figure 1 The power supply 1 of this embodiment includes a puncture cannula 2, a cylindrical body 3, a pair of ring-side terminals 4A and 4B, ring-side power supply wires 5A and 5B, a shaft 6, a power receiving unit 7, a pair of shaft-side terminals 8A and 8B, shaft-side power supply wires 9A and 9B, a first coaxial cable 10, and a second coaxial cable 11.

[0036] The puncture cannula 2 is cylindrical and made of an insulating material such as resin. In the illustrated example, the puncture cannula 2 is a cannula having an elongated small diameter portion 2b extending from a large diameter portion 2a constituting one end, and has a circular through hole 12 extending through the cross section of the large diameter portion 2a and the small diameter portion 2b.

[0037] The cylindrical body 3 is attached to one end (large diameter portion 2a in the illustrated example) of the puncture cannula 2. The cylindrical body 3 includes a connecting ring 13, a power supply ring 14, and a cylindrical body 15. The connecting ring 13 and the power supply ring 14 are connected via the cylindrical body 15.

[0038] The aforementioned “connecting the connecting ring 13 and the power supply ring 14 via the cylindrical body 15” can be achieved, for example, by bonding the connecting ring 13 and the power supply ring 14 to the cylindrical body 15 using an adhesive or by fusing the connecting ring 13 and the power supply ring 14 to the cylindrical body 15. Alternatively, the connecting ring 13, the cylindrical body 15, and the power supply ring 14 can be integrally molded in advance, thereby achieving a state where the connecting ring 13 and the power supply ring 14 are connected via the cylindrical body 15.

[0039] The connecting ring 13 is formed of an insulating material such as resin, and is connected to one end (large diameter portion 2a) of the puncture cannula 2 by attaching the connecting ring 13 to one end (large diameter portion 2a) of the puncture cannula 2 or by integrally forming the connecting ring 13 with the one end (large diameter portion 2a) of the puncture cannula 2. The above-mentioned "attaching the connecting ring 13 to one end of the puncture cannula 2" is, for example, by providing a pin 20 ( Figure 2 Subgraph (B) of Figure 3), with one end (large diameter portion 2a) of the puncture cannula 2 inserted into the interior of the connecting ring 13, the tip of the pin 20 is pressed toward the one end of the puncture cannula 2. In this case, the connecting ring 13 is provided with the aforementioned pin 20 and an elastic member (not shown) that applies a force (urging) to the pin 20 radially inward of the connecting ring 13. The force of the elastic member presses the tip of the pin 20 toward the one end of the puncture cannula 2. Furthermore, by pulling the pin 20 radially outward of the connecting ring 13 against the force of the elastic member, the pressure of the tip of the pin 20 against the one end of the puncture cannula 2 can be released, and the connecting ring 13 can be removed from the one end of the puncture cannula 2. In addition, the above-mentioned "installing the connecting ring 13 on one end of the puncture cannula 2" can be achieved by inserting one end of the puncture cannula 2 (large diameter portion 2a) into the interior of the connecting ring 13 while making the inner diameter of the connecting ring 13 consistent with the outer diameter of the one end of the puncture cannula 2 (in this case, the connecting ring 13 is connected to the one end of the puncture cannula 2 by the friction force generated between the inner surface of the connecting ring 13 and the outer surface of the one end of the puncture cannula 2). In addition, the above-mentioned "installing the connecting ring 13 on one end of the puncture cannula 2" can also be achieved by inserting the connecting ring 13 into the interior of the one end of the puncture cannula 2 while making the outer diameter of the connecting ring 13 consistent with the inner diameter of the one end of the puncture cannula 2 (in this case, the connecting ring 13 is connected to the one end of the puncture cannula 2 by the friction force generated between the outer surface of the connecting ring 13 and the inner surface of the one end of the puncture cannula 2). In addition, the connecting ring 13 can also be installed on the one end of the puncture cannula 2 by bonding the connecting ring 13 to the one end of the puncture cannula 2 with an adhesive.

[0040] Figure 6 Sub-figure (A) is a cross-sectional schematic diagram of the power supply ring 14, Figure 6 Sub-figure (B) is a schematic cross-sectional view showing a state in which the shaft 6 is cut at a position where the shaft-side terminals 8A and 8B are provided.

[0041] The power feeding ring 14 is formed of an insulating material such as resin, and a pair of ring-side terminals 4A and 4B are provided on the inner surface of the power feeding ring 14 .

[0042] The ring-side terminals 4A and 4B are formed of metal. The ring-side terminals 4A and 4B are arranged to face each other in the radial direction E of the power supply ring 14 and are fixed to the power supply ring 14 using screws or adhesive. The so-called ring-side terminals 4A and 4B facing each other in the radial direction E means that the center of the width of the terminal 4A and the center of the width of the terminal 4B are located on the same straight line extending in the radial direction E. The ring-side terminals 4A and 4B each have a length that is less than half the circumference of the power supply ring 14. In the circumferential direction of the power supply ring 14, a gap S is left between one end of the ring-side terminals 4A and 4B and between the other ends of the ring-side terminals 4A and 4B. In addition, the ring-side terminals 4A and 4B can also be formed by applying metal powder to the inner surface of the power supply ring 14.

[0043] like Figure 2 The subgraph (B) and Figure 5 As shown, in the axial direction of the power supply ring 14 ( Figure 2 、 Figure 5 In the left-right direction), the ring-side terminals 4A and 4B are in an arc shape that is curved toward the radial outside of the power supply ring 14 over the entire circumference, thereby having a groove 21 that is recessed toward the radial outside of the power supply ring 14. In addition, the present invention is not limited to the ring-side terminals 4A and 4B being in the above-mentioned arc shape. For example, the ring-side terminals 4A and 4B may be formed in the axial direction ( Figure 2 、 Figure 5 The central portions of the ring-side terminals 4A and 4B (in the left-right direction) are formed to be thinner so that the ring-side terminals 4A and 4B have grooves 21 that are recessed toward the radially outer side of the power supply ring 14.

[0044] Ring-side power supply lines 5A and 5B are DC power supply lines. One end of ring-side power supply line 5A is connected to one electrode of a DC power source, and the other end of ring-side power supply line 5A is connected to ring-side terminal 4A, thereby connecting one electrode of the DC power source and ring-side terminal 4A via ring-side power supply line 5A. One end of ring-side power supply line 5B is connected to the other electrode of the DC power source, and the other end of ring-side power supply line 5B is connected to ring-side terminal 4B, thereby connecting the other electrode of the DC power source and ring-side terminal 4B via ring-side power supply line 5B. (In the illustrated example, a cable is used to bundle ring-side power supply lines 5A and 5B, with ring-side power supply lines 5A and 5B separated at one and the other ends of the cable, so that power supply lines 5A and 5B are connected to the DC power source and terminal 4 as described above.) A user can apply voltage to ring-side terminals 4A and 4B via ring-side power supply lines 5A and 5B by turning on a switch (such as a foot switch) connected to the DC power source, and stop applying voltage to terminals 4A and 4B by turning off the switch.

[0045] The cylindrical body 15 is formed of a retractable insulating material (e.g., resin). The ring-side power supply wires 5A and 5B are attached to the surface (outer or inner surface) of the cylindrical body 15 so as to extend spirally in the direction in which the cylindrical body 15 extends (in the illustrated example, the ring-side power supply wires 5A and 5B are attached to the outer surface of the cylindrical body 15). In order to connect one end of the ring-side power supply wires 5A and 5B to the DC power supply and the other end of the ring-side power supply wires 5A and 5B to the ring-side terminals 4A and 4B, the ring-side power supply wires 5A and 5B are passed through a through hole formed in the wall of the cylindrical body 15, with one end of the ring-side power supply wires 5A and 5B disposed on the outside of the cylindrical body 15 and the other end of the ring-side power supply wires 5A and 5B disposed on the inside of the cylindrical body 15.

[0046] Alternatively, the ring-side power supply wires 5A and 5B may be embedded in the wall of the cylindrical body 15 so as to extend spirally in the direction in which the cylindrical body 15 extends. In this case, one end of the ring-side power supply wires 5A and 5B extends outward from the cylindrical body 15 in order to connect one end of the ring-side power supply wires 5A and 5B to the DC power supply.

[0047] In addition, as the ring-side power supply wires 5A and 5B, spiral insulated wires can be used. In addition, it is not necessary to attach the ring-side power supply wires 5A and 5B to the surface (external surface or internal surface) of the cylindrical body 15 or to bury the ring-side power supply wires 5A and 5B in the wall of the cylindrical body 15. The ring-side power supply wires 5A and 5B can also be separated from the cylindrical body 15.

[0048] The shaft 6 is formed of an insulating material such as resin, and is sequentially inserted through the interior of the cylindrical body 3 and the interior of the puncture cannula 2 (the interior of the puncture cannula 2 described above corresponds to the through hole 12).

[0049] The shaft 6 has a longitudinal direction ( Figure 2 The cavity 30 ( Figures 3 to 5 ). On the base end side of the shaft 6, a gripping portion 31 for the operator to grip is provided in a manner protruding outward in the radial direction. Figure 2 ). The gripping portion 31 has a hollow structure, and the aforementioned cavity 30 extends from the internal space of the gripping portion 31 to the front end portion of the shaft 6. The power receiving portion 7 is provided in the internal space of the gripping portion 31, and outputs microwaves by receiving a DC power supply from a power source. The power receiving portion 7 includes a microwave oscillator 32 and a microwave amplifier 33. The first coaxial cable 10 is disposed in the internal space of the gripping portion 31, connecting the microwave oscillator 32 and the microwave amplifier 33. The microwave oscillator 32 oscillates and generates microwaves by using the DC power supplied from the power source to the power receiving portion 7 as a DC power source. The microwave amplifier 33 amplifies the microwaves supplied from the microwave oscillator 32 via the first coaxial cable 10 by using the DC power supplied from the power source to the power receiving portion 7 as a DC power source.

[0050] The second coaxial cable 11 passes through the hollow space 30 of the shaft 6 and extends from the microwave amplifier 33 to the front end of the shaft 6 .

[0051] In the illustrated example, a pair of blades 34, 34 are provided at the distal end (working portion) of the shaft 6, and a microwave amplifier 33 is connected to the blades 34, 34 via a second coaxial cable 11. The blades 34, 34 are, for example, a tapered coaxial body such as that disclosed in Japanese Patent Application Laid-Open No. 2018-11994, with the central conductor and outer conductor ends exposed and an insulator interposed therebetween, and can supply microwaves to the central conductor via the second coaxial cable 11.

[0052] A wire or shaft (not shown) is connected to the blades 34, 34. By pushing or pulling the wire or shaft, the blades 34, 34 can be opened or closed. For example, the wire or shaft is configured to pass through the cavity 30 of the shaft 6. By operating the control shaft 35 connected to the base end of the shaft 6, the wire or shaft can be pushed or pulled to open and close the blades 34, 34. Alternatively, a drive mechanism can be provided on the shaft 6 to rotate the wire or shaft about the axis, so that the blades 34, 34 can be rotated as the drive mechanism rotates the wire or shaft. The drive mechanism is provided, for example, on the grip 31.

[0053] A pair of shaft-side terminals 8A and 8B are formed of metal and are provided on the outer surface of the shaft 6. The shaft-side terminals 8A and 8B are arranged in a radial direction F ( Figure 6 In the sub-figure (B) of FIG), the width Ha of the shaft-side terminals 8A and 8B in the circumferential direction of the shaft 6 ( Figure 6 Sub-figure (B)) is larger than the width Hb of the gap S in the circumferential direction of the power supply ring 14 ( Figure 6 In addition, the so-called shaft-side terminals 8A and 8B are relative to each other in the radial direction F, which means that the width center of the terminal 8C and the width center of the terminal 8D are located on the same straight line extending in the radial direction F.

[0054] Shaft-side terminals 8A and 8B are arranged in recesses 41 formed on the outer surface of shaft 6 while being supported by springs 40. Springs 40 are leaf springs or coil springs and are attached to the outer surface of shaft 6 (eg, the surface of recesses 41).

[0055] Shaft-side power supply lines 9A and 9B are DC power supply lines. Shaft-side power supply line 9A connects shaft-side terminal 8A to power receiving unit 7, while shaft-side power supply line 9B connects shaft-side terminal 8B to power receiving unit 7. These shaft-side power supply lines 9A and 9B are, for example, embedded in the wall of shaft 6. In this case, one end of each shaft-side power supply line 9A and 9B extends into the interior space of grip 31 and connects to power receiving unit 7. The other end of each shaft-side power supply line 9A and 9B extends into recess 41 and connects to shaft-side terminals 8A and 8B.

[0056] During the period when the shaft 6 is not inserted into the cylindrical body 3, the compression length (compression stroke) of the springs 40, 40 supporting the terminals 8A, 8B is reduced, and the distances La, Lb ( Figure 6 The sub-figure (B)) exceeds the inner diameter R ( Figure 6 Subgraph (A)).

[0057] Furthermore, the user presses the shaft-side terminals 8A, 8B with his fingers, compressing the spring 40 supporting the terminals 8A, 8B, so that the distances La, Lb are less than or equal to the through-hole inner diameter R, thereby allowing the shaft 6 to penetrate the interior of the cylindrical body 3 and the interior of the puncture sleeve 2 in sequence, and allowing the shaft-side terminals 8A, 8B to enter the interior of the power supply ring 14. In this state, Figure 5 As shown, by fitting one terminal 8 into the groove 21 of the ring-side terminal 4A, bringing one terminal 8 into contact with the ring-side terminal 4A, and fitting the other terminal 8 into the groove 21 of the ring-side terminal 4B, bringing the other terminal 8 into contact with the ring-side terminal 4B, the power supply path on the power source side (composed of power supply wires 5A, 5B and terminals 4A, 4B) is connected to the power supply path on the power receiving unit 7 side (composed of terminals 8A, 8B and power supply wires 9A, 9B). This allows DC power from the DC power source to be supplied to the power receiving unit 7, and microwaves to be emitted from the distal end (blades 34, 34) of the shaft 6. Furthermore, the reaction force of the spring 40, which resists compression, maintains contact between the ring-side terminals 4A, 4B and the shaft-side terminals 8A, 8B, thereby maintaining continuous power supply to the power receiving unit 7.

[0058] For example, Figure 4 as well as Figure 5 As shown, in a state where terminal 8A is engaged with groove 21 of terminal 4A, terminal 8A is in contact with terminal 4A, terminal 8B is engaged with groove 21 of terminal 4B, and terminal 8B is in contact with terminal 4B, the above-mentioned DC power flows in the order of, for example, the positive electrode of the DC power supply → power supply line 5A → terminal 4A → terminal 8A → power supply line 9A → power receiving unit 7 → power supply line 9B → terminal 8B → terminal 4B → power supply line 5B → negative electrode of the DC power supply.

[0059] In addition, as described above, from the state where the terminal 8A contacts the terminal 4A and the terminal 8B contacts the terminal 4B ( Figure 4 and Figure 5 By rotating shaft 6 about its axis (in a state in which the power supply is not provided), in the opposite direction to the above, terminal 8A can be engaged with groove 21 of terminal 4B, causing terminal 8A to contact terminal 4B, and then terminal 8B can be engaged with groove 21 of terminal 4A, causing terminal 8B to contact terminal 4A. In this case, DC power flows, for example, in the order of the positive electrode of the DC power supply → power supply line 5A → terminal 4A → terminal 8B → power supply line 9B → power receiving unit 7 → power supply line 9A → terminal 8A → terminal 4B → power supply line 5B → negative electrode of the DC power supply.

[0060] Hereinafter, the situation where “one of the shaft-side terminals 8A and 8B contacts the ring-side terminal 4A and the other terminal 8 contacts the ring-side terminal 4B” will be appropriately described as “ring-side terminals 4A and 4B contact the shaft-side terminals 8A and 8B”.

[0061] Furthermore, when ring-side terminals 4A, 4B are in contact with shaft-side terminals 8A, 8B (the power supply path on the power source side is connected to the power supply path on the power receiving unit 7 side), direct current power is supplied to microwave oscillator 32 and microwave amplifier 33 of power receiving unit 7, causing microwave oscillator 32 to oscillate and generate microwaves. These microwaves are then supplied to microwave amplifier 33 via first coaxial cable 10 and amplified. These amplified microwaves are then supplied to the central conductor of the distal end portion (blades 34, 34) of shaft 6 via second coaxial cable 11 and can be emitted from this central conductor. The frequency of the microwaves emitted from the central conductor is not particularly limited, but is preferably 300 MHz to 6 GHz, and more preferably 2.45 GHz ± 50 MHz.

[0062] In the power supply 1 of the present embodiment, the cylindrical body 15 is formed of an insulating material that is flexible and retractable. Thus, when the shaft-side terminals 8A and 8B are engaged with the grooves 21 of the ring-side terminals 4A and 4B and the ring-side terminals 4A and 4B are in contact with the shaft-side terminals 8A and 8B, the cylindrical body 15 is retracted and retracted as the shaft 6 moves in the longitudinal direction. Figure 7 For example, when the shaft 6 is turned to one side in the longitudinal direction ( Figure 7 When the shaft 6 is moved to the left side so that the length of the shaft 6 extending from the front end of the puncture cannula 2 becomes longer, the cylindrical body 15 is gradually compressed ( Figure 7 In addition, for example, when the axis 6 is directed to the other side in the longitudinal direction ( Figure 7 When the shaft 6 is moved to the right side of the puncture cannula 2 so as to shorten the length of the shaft 6 extending from the front end, the cylindrical body 15 gradually extends ( Figure 7 Subgraph (A)).

[0063] When the power supply 1 of this embodiment is used in surgery, first, the puncture cannula 2 is inserted into the subject H ( Figure 1 ) of the body wall. At this point, the orientation of the puncture cannula 2 is adjusted so that one end of the puncture cannula 2 and the barrel 3 are located outside the body, and the other end of the puncture cannula 2 is inserted into the body. As shown in the example shown, if the puncture cannula 2 has a large-diameter portion 2a at one end and a small-diameter portion 2b at the other end, for example, the small-diameter portion 2B is inserted into the body until the large-diameter portion 2a contacts the body wall surface.

[0064] Next, the ring-side power supply wires 5A and 5B are fixed to the body wall surface of the subject H.

[0065] Next, the surgical assistant hands shaft 6 to the operator, who then inserts shaft 6 from one end of puncture cannula 2 into through-hole 12, allowing the distal end of shaft 6 to extend from the other end of puncture cannula 2 into the body. This positions blades 34, 34 (the distal ends of shaft 6) within the body at the surgical site. At this point, the control shaft 35 is operated to open and close blades 34, 34, and the area to be coagulated and cut is clamped with blades 34, 34, performing the coagulation (hemostasis) and cutting operations. Furthermore, since the power supply line is not connected to shaft 6 during this process, the surgical assistant can easily hand shaft 6 to the operator, allowing the operator to easily operate shaft 6.

[0066] As described above, with the blades 34, 34 positioned at the surgical site within the body, if the ring-side terminals 4A, 4B come into contact with the shaft-side terminals 8A, 8B, turning on the switch connected to the power source allows operation at the surgical site. Specifically, turning on the switch supplies DC power to the power receiving unit 7, oscillating microwaves from the microwave oscillator 32. These microwaves are then supplied to the microwave amplifier 33 for amplification. The amplified microwaves are then supplied to the central conductors of the blades 34, 34 and emitted toward the coagulation and cutting site. This cauterizes the surgical site, achieving hemostasis. Furthermore, the microwaves emitted from the central conductor toward the surgical site flow toward the outer conductors of the blades 34, 34 located nearby. Furthermore, with the switch turned on, if the shaft 6 is inserted through the through-hole 12 of the puncture cannula 2, bringing the ring-side terminals 4A, 4B into contact with the shaft-side terminals 8A, 8B, DC power is supplied to the power receiving unit 7 from the moment the terminals 4A, 4B come into contact, emitting microwaves from the blades 34, 34 (the distal end of the shaft 6).

[0067] According to the power supply 1 of the present embodiment described above, power can be supplied to the power receiving unit 7 by a simple mechanism that connects the power supply path (power supply lines 5A, 5B and terminals 4A, 4B) on the power source side with the power supply path (terminals 8A, 8B and power supply lines 9A, 9B) on the power receiving unit 7 side by utilizing the contact between the ring-side terminals 4A, 4B and the shaft-side terminals 8A, 8B. Therefore, according to the power supply 1 of the present embodiment, power can be supplied to the power receiving unit 7 at a low cost.

[0068] In addition, according to the power supply 1 of this embodiment, Figure 1 As shown, if the ring-side terminals 4A, 4B are brought into contact with the shaft-side terminals 8A, 8B while the cylindrical body 3 is located outside the body, the current flowing due to the contact of the terminals 4, 8 is conducted outside the body, thereby reducing the risk of electric shock to the subject H.

[0069] Furthermore, according to the power supply device 1 of this embodiment, while the ring-side terminals 4A, 4B are in contact with the shaft-side terminals 8A, 8B and power from the power source is supplied to the power receiving unit 7, the shaft-side terminals 8A, 8B are arranged inside the power supply ring 14 ( Figure 2 Subgraph (B) of Figure 4 、 Figure 5 ). Therefore, it is possible to prevent an operator or the like from being electrocuted due to contact with the shaft-side terminals 8A and 8B.

[0070] Furthermore, when the ring-side terminals 4A and 4B are in contact with the shaft-side terminals 8A and 8B, the cylindrical body 15 expands and contracts as the shaft 6 moves in the longitudinal direction. This prevents the cylindrical body 15 from hindering the movement of the shaft 6 .

[0071] Furthermore, according to the power supply 1 of this embodiment, a rigid coaxial cable is not used, and instead the ring-side terminals 4A and 4B are connected to the power source using power supply wires 5A and 5B. Therefore, when the shaft 6 is inserted into the puncture cannula 2, the load applied to the shaft 6 can be kept small when the shaft 6 is manipulated. Therefore, manipulation of the shaft 6 can be easily performed. For example, when the shaft 6 is tilted to change the angle of the power supply 1, the load applied to the shaft 6 is small, making it easy to tilt the shaft 6 (i.e., the angle of the power supply 1 can be easily changed).

[0072] Furthermore, according to the power supply device 1 of this embodiment, the ring-side terminals 4A and 4B are arranged in the radial direction E ( Figure 6 In the sub-figure (A) of FIG), the shaft-side terminals 8A and 8B are opposite to each other in the radial direction F ( Figure 6 In the sub-figure (B) of FIG), the width Ha of the shaft-side terminals 8A and 8B ( Figure 6 The subgraph (B) is larger than the width Hb of the gap S ( Figure 6 Therefore, even if the shaft 6 is accidentally rotated during the operation, a situation in which one terminal 8 (terminal 8A or terminal 8B) contacts both the ring-side terminals 4A and 4B will not occur, and a short circuit (short) between the terminals will not occur.

[0073] Furthermore, according to the power supply 1 of this embodiment, microwaves are emitted from the distal end portion (blades 34, 34) of the shaft 6, thereby exciting water molecules in the living tissue of the subject H and heating the living tissue itself. Therefore, the living tissue is not burned and the surrounding damage can be minimized.

[0074] Furthermore, the cylindrical body 3 can be attached to one end of the existing puncture cannula 2 , so there is no need to modify the puncture cannula 2 , and the existing puncture cannula 2 can be effectively utilized.

[0075] In addition, the present invention is not limited to the methods shown in the above-mentioned embodiments, and various modifications can be made. The following describes a modified example of the present invention. In addition, in the following description, the description will be centered around the points that differ from the above-mentioned embodiments. For structures common to the above-mentioned embodiments, the same reference numerals are shown in the drawings, and description is omitted.

[0076] For example, the power supply of the present invention can be used as Figure 8 as well as Figure 9 Deform as shown. Figure 8 as well as Figure 9 The power supply 50 shown in the figure replaces the cylindrical body 3 shown in the above embodiment and includes a cylindrical body 51. The cylindrical body 51 includes a connecting ring 13, a power supply ring 14, and a cylindrical body main body 52 that connects the connecting ring 13 and the power supply ring 14. The cylindrical body main body 52 is formed of a flexible insulating material and has a shape that decreases in diameter (shrinks in diameter) as it approaches the power supply ring 14 side. Even in the above-mentioned modified example, the cylindrical body main body 52 is formed of a flexible material, so that when the ring-side terminals 4A, 4B are in contact with the shaft-side terminals 8A, 8B, the shaft 6 can be moved smoothly in the long side direction (the expansion and contraction of the cylindrical body main body 52 can avoid the cylindrical body main body 52 becoming an obstacle to the movement of the shaft 6). In addition, even in the above-mentioned modified example, the ring-side power supply wires 5A, 5B are attached to the surface (outer surface or inner surface) of the cylindrical body main body 52 in a manner that spirally extends in the extension direction of the cylindrical body main body 52. Alternatively, the ring-side power supply wires 5A and 5B are embedded in the wall of the cylindrical body 52 so as to spirally extend in the extending direction of the cylindrical body 52 .

[0077] In addition, as the ring-side power supply wires 5A and 5B, spiral insulated wires can be used. In addition, it is not necessary to attach the ring-side power supply wires 5A and 5B to the surface (external surface or internal surface) of the cylindrical body 52 or to embed the ring-side power supply wires 5A and 5B in the wall of the cylindrical body 52. ​​The ring-side power supply wires 5A and 5B can also be separated from the cylindrical body 52.

[0078] Furthermore, when the above-described cylindrical body 51 is used, the connecting ring 13 can also be connected to one end of the puncture cannula 2 by the same method as in the above-described embodiment.

[0079] Alternatively, the cylindrical body 3, 51 may be connected to one end of the puncture cannula in such a manner that the connecting ring 13 can rotate relative to the puncture cannula. In this case, the terminal 8 on one side is in contact with the terminal 4A, and the terminal 8 on the other side is in contact with the terminal 4B ( Figure 5 In the state), by utilizing the friction between the terminals, when the shaft 6 is rotated, the cylindrical bodies 3 and 51 also rotate.

[0080] In addition, the power supply of the present invention can be Figure 10 and Figure 11 Changes as shown. Figure 10 as well as Figure 11 The power supply 60 shown in FIG. 1 further includes a winding ring 61 (i.e., the power supply 60 replaces the cylindrical body 3 shown in the embodiment) in addition to the puncture cannula 2, a pair of ring-side terminals 4A and 4B, ring-side power supply wires 5A and 5B, a shaft 6, a power receiving unit 7, a pair of shaft-side terminals 8A and 8B, shaft-side power supply wires 9A and 9B, a first coaxial cable 10, and a second coaxial cable 11 shown in the embodiment. The winding ring 61 is connected to one end of the puncture cannula 2 and can be wound around the ring-side power supply wires 5A and 5B. The shaft 6 is inserted through the interior of the power supply ring 14, the winding ring 61, and the interior of the puncture cannula 2 in this order.

[0081] In the example shown in the figure, one end side of the winding ring 61 (the power supply ring 14 side) is used to wind the ring side power supply wires 5A, 5B, and when one end (large diameter portion 2a) of the puncture cannula 2 is inserted into the inner side of the other end side (puncture cannula 2 side) of the winding ring 61, the other end side (puncture cannula 2 side) of the winding ring 61 is connected to one end of the puncture cannula 2. This connection is achieved, for example, by a pin 20 ( Figure 10(B) ), this can be achieved by pressing the tip of the pin 20 toward the end of the puncture cannula 2 while one end (large diameter portion 2a) of the puncture cannula 2 is inserted into the inner side of the winding ring 61. In this case, the winding ring 61 is provided with the aforementioned pin 20 and an elastic member (not shown) that applies a force radially inwardly to the winding ring 61. The force of the elastic member presses the tip of the pin 20 toward the end of the puncture cannula 2. Furthermore, by pulling the pin 20 radially outwardly of the winding ring 61 against the force of the elastic member, the pressure of the tip of the pin 20 against the end of the puncture cannula 2 can be released, allowing the winding ring 61 to be removed from the end of the puncture cannula 2. Furthermore, the aforementioned "connection of the winding ring 61 to the one end of the puncture cannula 2" can also be achieved by inserting the one end (large diameter portion 2a) of the winding ring 61 into the inner side of the other end of the puncture cannula 2 while the inner diameter of the other end of the winding ring 61 is aligned with the outer diameter of the one end of the puncture cannula 2 (in this case, the winding ring 61 is connected to the one end of the puncture cannula 2 by utilizing the frictional force generated between the inner surface of the other end of the winding ring 61 and the outer surface of the one end of the puncture cannula 2). Furthermore, the aforementioned "connection of the winding ring 61 to the one end of the puncture cannula 2" can also be achieved by inserting the other end of the winding ring 61 into the interior of the one end of the puncture cannula 2 while the outer diameter of the other end of the winding ring 61 is aligned with the inner diameter of the one end of the puncture cannula 2 (in this case, the winding ring 61 is connected to the one end of the puncture cannula 2 by utilizing the frictional force generated between the outer surface of the other end of the winding ring 61 and the inner surface of the one end of the puncture cannula 2). Alternatively, the winding ring 61 and the one end of the puncture cannula 2 may be connected by bonding the winding ring 61 and the one end of the puncture cannula 2 with an adhesive.

[0082] According to the above-described modified embodiment, by winding the ring-side power supply wires 5A and 5B around the winding ring 61, it is possible to prevent slack in the area of ​​the ring-side power supply wires 5A and 5B located between the power supply ring 14 and the puncture cannula 2. Therefore, it is possible to prevent the area of ​​the ring-side power supply wires 5A and 5B from becoming an obstacle to the operation.

[0083] Furthermore, to reduce the effort and time required to wind the ring-side power supply wires 5A and 5B, an elastic member that pulls the ring-side power supply wires 5A and 5B toward the winding ring 61 may be provided on the winding ring 61. In this case, the winding ring 61 is configured such that, as the power supply ring 14 and the puncture cannula 2 move closer due to movement of the shaft 6, the ring-side power supply wires 5A and 5B can be wound around the winding ring 61 by the pull of the elastic member. Furthermore, in this case, the winding ring 61 is preferably configured such that, as the shaft 6 moves in a manner that opposes the pull of the elastic member, the power supply ring 14 and the puncture cannula 2 move away from each other, allowing the ring-side power supply wires 5A and 5B wound around the winding ring 61 to be unwound.

[0084] Although not shown in the figure, the power supply of the present invention may also include a puncture cannula 2, a power supply ring 14, ring-side terminals 4A and 4B, ring-side power supply wires 5A and 5B, a shaft 6, a power receiving unit 7, shaft-side terminals 8A and 8B, and shaft-side power supply wires 9A and 9B, wherein a coil formed by partially winding the ring-side power supply wires 5A and 5B is connected to one end of the puncture cannula 2. In this case, the coil utilizes the shape memory of the ring-side power supply wires 5A and 5B to maintain the partially wound state of the ring-side power supply wires 5A and 5B. Furthermore, as shaft 6 is sequentially inserted into power supply ring 14, the aforementioned coil, and puncture cannula 2, ring-side terminals 4A, 4B can be brought into contact with shaft-side terminals 8A, 8B. With ring-side terminals 4A, 4B in contact with shaft-side terminals 8A, 8B, power from the power source is supplied to power receiving unit 7 via ring-side power supply wires 5A, 5B, ring-side terminals 4A, 4B, shaft-side terminals 8A, 8B, and shaft-side power supply wires 5A, 5B. Furthermore, in the aforementioned power supply device, it is preferable that the aforementioned coil be stretchable, so that with ring-side terminals 4A, 4B in contact with shaft-side terminals 8A, 8B, the coil can be stretched and contracted as shaft 6 moves, while being clamped between power supply ring 14 and puncture cannula 2.

[0085] In addition, in the above, an example is shown in which the shaft side terminals 8A and 8B are arranged in the recess 41 of the shaft 6, but in the above power supply, the shaft side terminals 8A and 8B can also be fixed to the outer surface of the shaft 6 using screws or adhesive, or the shaft side terminals 8A and 8B can be formed by coating metal powder on the outer surface of the shaft 6.

[0086] In addition, the power supply of the present invention can be Figure 12 Make the changes as shown ( Figure 13 express Figure 12 The power supply 70 shown in FIG has an axis). Figure 12 The power supply 70 shown in the figure is different from the power supply shown in the above embodiment in that: the shaft 71, which is inserted into the interior of the cylindrical body 3 and the interior of the puncture cannula 2 in sequence, has a shaft body 72 and a cylindrical piece 73 covering the outside of the shaft body 72; the power receiving part 7, the first coaxial cable 10, the second coaxial cable 11, the first connector 74 and the first shaft side power supply lines 9C and 9D are arranged on the shaft body 72; and the pair of shaft side terminals 8A and 8B, the second connector 75 and the second shaft side power supply lines 9E and 9F are arranged on the cylindrical piece 73.

[0087] The shaft body 72 and the cylindrical piece 73 are respectively formed of an insulating material such as resin. The shaft body 72 has the same shape as the shaft 6 shown in the above embodiment, and has a longitudinal direction ( Figure 12 as well as Figure 13A cavity extending in the left and right directions). The gripping portion 31 for the operator to grip is provided on the base end side of the shaft body 72 in a manner protruding radially outward. The gripping portion 31 has a hollow structure, and the above-mentioned cavity of the shaft body 72 extends from the internal space of the gripping portion 31 and reaches the front end portion of the shaft body 72. The power receiving portion 7 is provided with a microwave oscillator 32 and a microwave amplifier 33 in the same manner as in the above-mentioned embodiment, and is provided in the internal space of the gripping portion 31. The first coaxial cable 10 is arranged in the internal space of the gripping portion 31, connecting the microwave oscillator 32 and the microwave amplifier 33. The microwave oscillator 32 uses the DC power supplied from the power supply to the power receiving portion 7 as a DC power supply to oscillate microwaves. The microwave amplifier 33 uses the DC power supplied from the power supply to the power receiving portion 7 as a DC power supply to amplify the microwaves supplied from the microwave oscillator 32 through the first coaxial cable 10.

[0088] The second coaxial cable 11 extends from the microwave amplifier 33 to the front end of the shaft body 72 through the cavity of the shaft body 72. In the illustrated example, a pair of blades 34, 34 are provided at the front end (working portion) of the shaft body 72, and the microwave amplifier 33 and the blades 34, 34 are connected via the second coaxial cable 11.

[0089] A pair of shaft-side terminals 8A and 8B are arranged in the radial direction of the cylindrical piece 73 (in the example shown in the figure, equivalent to Figure 12 、 Figure 13 The shaft-side terminals 8A and 8B are arranged on the outer surface of the cylindrical piece 73 so as to face each other in the vertical direction. In the example shown in the figure, the shaft-side terminals 8A and 8B are each arranged in a recessed portion 77 formed on the outer surface of the cylindrical piece 73 while being supported by a spring 76. The spring 76 is a leaf spring or a coil spring and is attached to the outer surface of the cylindrical piece 73 (e.g., the surface of the recessed portion).

[0090] The first axial power supply lines 9C and 9D and the second axial power supply lines 9E and 9F are DC power supply lines. The first axial power supply lines 9C and 9D connect the power receiving unit 7 to the first connector 74. The first axial power supply lines 9C and 9D are, for example, buried in the wall of the shaft body 72. In this case, one end of the first axial power supply lines 9A and 9B respectively extends into the internal space of the gripping portion 31 and is connected to the power receiving unit 7. In addition, the first connector 74 is mounted on the outer surface of the shaft body 72, and the other end of the first axial power supply lines 9A and 9B is connected to the first connector 74. The second axial power supply line 9E connects the axial terminal 8A to the second connector 75, and the second axial power supply line 9F connects the axial terminal 8B to the second connector 75. The second axial power supply lines 9E and 9F are, for example, buried in the wall of the tubular sheet 73. In this case, one end of the second axial power supply lines 9E and 9F respectively extends into the recess 77. The other ends of the second shaft-side power supply wires 9E and 9F extend outward from the cylindrical piece 73 and are connected to the second connector 75 .

[0091] Figure 12 The power supply 70 shown in FIG. 1 can connect the shaft-side terminals 8A and 8B to the power receiving unit 7 via the first shaft-side power supply lines 9C and 9D and the second shaft-side power supply lines 9E and 9F by connecting the first connector 74 and the second connector 75. For example, the first connector 74 and the second connector 75 can be connected by inserting the plug 74a of the first connector 74 into the insertion port of the second connector 75.

[0092] In addition, Figure 12 In the power supply 70 shown in FIG, when the shaft 71 is not inserted into the cylindrical body 3, the compression length (compression stroke) of the springs 76, 76 supporting the terminals 8A, 8B is small, so the distance from the center of the shaft 71 to the outer edge of the shaft-side terminals 8A, 8B exceeds the through hole 12 of the puncture cannula 2 ( Figure 12 The user presses the shaft-side terminals 8A and 8B with their fingers, compressing the spring 76 supporting the terminals 8A and 8B so that the distance mentioned above becomes less than the inner diameter of the through hole 12, thereby allowing the shaft 71 to sequentially penetrate the interior of the power supply ring 14 (more specifically, the interior of the cylindrical body 3) and the interior of the puncture sleeve 2, and allowing the shaft-side terminals 8A and 8B to enter the interior of the power supply ring 14.

[0093] Furthermore, with the first connector 74 and the second connector 75 connected, as the shaft 71 is inserted into the interior of the power supply ring 14 (more specifically, into the interior of the cylindrical body 3) and the interior of the puncture cannula 2, the shaft-side terminals 8A and 8B enter the interior of the power supply ring 14, causing one terminal 8 to contact the ring-side terminal 4A, and the other terminal 8 to contact the ring-side terminal 4B. This allows power from the DC power supply to be supplied to the power receiving unit via the ring-side power supply lines 5A and 5B, the ring-side terminals 4A and 4B, the shaft-side terminals 8A and 8B, the second shaft-side power supply lines 9E and 9F, and the first shaft-side power supply lines 9C and 9D, and microwaves to be emitted from the distal end (blades 34 and 34) of the shaft body 72. Furthermore, the reaction force of the spring 76, which resists compression, maintains the contact between the ring-side terminals 4A and 4B and the shaft-side terminals 8A and 8B, thereby continuously supplying power to the power receiving unit 7.

[0094] In addition, Figure 12 In the power supply 70 shown in the figure, instead of arranging the axial side terminals 8A and 8B in the recess 77 of the cylindrical piece 73, the axial side terminals 8A and 8B can be fixed to the outer surface of the cylindrical piece 73 using screws or adhesive, or the axial side terminals 8A and 8B can be formed by coating metal powder on the outer surface of the cylindrical piece 73.

[0095] Furthermore, in the power supply of the present invention described above, it is preferred that the power receiving unit 7 (microwave output unit) be capable of supplying microwave power of 20W or more and 100W or less to the distal end of the shaft 6 or the shaft body 72. This allows the microwave power required for surgical procedures such as hemostasis to be supplied to the distal end of the shaft 6. Furthermore, the size, volume, and weight of the power receiving unit 7 can be controlled to approximately 50 mm × 100 mm × 5 mm, single-digit cubic centimeters, and single-digit grams (e.g., approximately 5 g), respectively. This allows the power receiving unit 7 (microwave output unit) to be easily accommodated within the grip 31 of the shaft 6.

[0096] When microwaves are supplied directly from the outside, as is conventional practice, a thick and rigid coaxial cable with a diameter of approximately 10 mm is required. With the power supply described above, by supplying DC power to the power receiving unit 7, it is easy to achieve a power conversion efficiency of approximately 50% for the microwave amplifier 33. Furthermore, while maintaining the efficiency of the microwave amplifier 33 at approximately 50%, in order to supply microwave power of 20 W or more but less than 100 W to the distal end of the shaft 6 or shaft body 72, it is sufficient to supply power to the power receiving unit 7 at a power of 200 W or less. Therefore, extremely fine power supply wires with a diameter of approximately 1 mm can be used for the ring-side power supply wires 5A, 5B and the shaft-side power supply wires 9A, 9B or 9C, 9D, 9E, 9F. Furthermore, since the ring-side power supply wires 5A, 5B are extremely fine, the operability of the shaft 6 or 71 when inserted into the puncture cannula 2 can be significantly improved.

[0097] In addition, as described above, in order to use the extremely fine power supply wires 5 and 9 to supply microwave power that can be used for surgery, the frequency of the microwaves emitted from the front end of the shaft 6 or the shaft body 72 is preferably 300 MHz or more and 6 GHz or less, and more preferably 2.45 GHz ± 50 MHz. In addition, the power conversion efficiency of the microwave amplifier (the ratio of the output microwave power to the used DC power) is preferably 30% or more and 80% or less, and more preferably 50% or more. In addition, the microwave output supplied to the front end of the shaft 6 or the shaft body 72 is preferably 20 W or more and 100 W or less, and more preferably 30 W or more and 60 W or less. In addition, the DC power supplied to the power receiving unit 7 is preferably 10 W or more and 150 W or less, and more preferably 50 W or more and 100 W or less.

[0098] Furthermore, for example, by using gallium nitride transistors in microwave amplifier 33, it is possible to achieve a power conversion efficiency of 50% or higher. In particular, the use of gallium nitride HEMTs (high electron mobility transistors) achieves high power conversion efficiency. Using a microwave amplifier 33 with such high power conversion efficiency can minimize the amount of externally supplied power, allowing the power supply lines 5 and 9 to be made even thinner and lighter.

[0099] In the aforementioned power supply, the power receiving unit 7 may include a DC power supply unit and a microwave output unit. In this case, the DC power supply unit constitutes a microwave oscillator that oscillates microwaves and a microwave amplifier that amplifies the microwaves. Externally supplied DC power serves as a DC power supply (driving power supply) for operating the microwave oscillator and the microwave amplifier. In this case, a voltage control unit capable of controlling the voltage may be added to the microwave output unit. Furthermore, in this case, an impedance matching circuit and an output control circuit may be added to the power receiving unit 7.

[0100] In addition, although the example of connecting the microwave oscillator 32 and the microwave amplifier 33 via a coaxial cable is shown above, when the microwave oscillator 32 and the microwave amplifier 33 are arranged in proximity, or when the microwave oscillator 32 and the amplifier 9 are formed on the same circuit substrate, the microwave oscillator 32 and the microwave amplifier 33 can also be connected via a microwave transmission line such as a microstrip line.

[0101] In addition, the power supply may also be provided with a power receiving unit 7 that outputs microwaves by receiving AC power from an AC power source. The AC power referred to herein refers to commercial frequency AC power supplied to household power distribution lines, etc. (in the case of Japan, the frequency is 50 Hz or 60 Hz and the voltage is about 100 V).

[0102] In the above case, AC power lines are used as the ring-side power lines 5A, 5B and the shaft-side power lines 9A, 9B or 9C, 9D, 9E, 9F. AC power is supplied from the AC power source to the power receiving unit 7 via the ring-side power lines 5A, 5B and the shaft-side power lines 9A, 9B or 9C, 9D, 9E, 9F. The power receiving unit 7 includes at least a converter, a microwave oscillator, and a microwave amplifier. The converter converts the AC power supplied from the AC power source to the power receiving unit 7 into DC power. The microwave oscillator uses the DC power converted by the converter as a DC power source (driving power source) to oscillate and generate microwaves. The microwave oscillator uses the DC power converted by the converter as a DC power source (driving power source) to amplify the microwaves.

[0103] As described above, when AC power is supplied to power receiving unit 7, it is easy to achieve a power conversion efficiency of approximately 90% for the converter that converts AC power to DC power. Therefore, it is easy to achieve a power level of 1.11 times that of the AC power supplied to power receiving unit 7 compared to the case where DC power is supplied to power receiving unit 7. Furthermore, as described above, by achieving a power conversion efficiency of approximately 90% for the converter that converts AC power to DC power, and thereby increasing the power level of 1.11 times that of the AC power supplied to power receiving unit 7, it is possible to achieve the same effects as when DC power is supplied to power receiving unit 7, while using an extremely thin power supply line that is substantially the same as when DC power is supplied to power receiving unit 7.

[0104] The power supply described above can also be modified to include a power receiving unit 7 capable of outputting a high frequency signal by supplying DC power from a DC power supply. In this case, the power supply 1, 50, 60, 70 includes a power receiving unit having a high-frequency oscillator and a high-frequency amplifier, a third coaxial cable, and a fourth coaxial cable, instead of the power receiving unit 7, the first coaxial cable 10, and the second coaxial cable 11.

[0105] The power receiving unit including the high-frequency oscillator and the high-frequency amplifier is housed within the grip 31 located on the proximal side of the shaft 6 or the shaft body 72. A third coaxial cable and a fourth coaxial cable are provided on the shaft 6 or the shaft body 72. The third coaxial cable connects the high-frequency oscillator to the high-frequency amplifier, and the fourth coaxial cable connects the high-frequency amplifier to the distal end (blades 34, 34) of the shaft 6 or the shaft body 72.

[0106] With the power supply 1 modified as described above, with ring-side terminals 4A, 4B in contact with shaft-side terminals 8A, 8B, DC power from a DC power supply can be supplied to the power receiving unit via ring-side power supply lines 5A, 5B, ring-side terminals 4A, 4B, shaft-side terminals 8A, 8B, and shaft-side power supply lines 9A, 9B or 9C, 9D, 9E, 9F. This causes the high-frequency oscillator to oscillate a high frequency, which is then supplied to a high-frequency amplifier via a third coaxial cable for amplification. This amplified high frequency is then supplied to the distal end (blades 34, 34) of the shaft 6 or shaft body 72 via a fourth coaxial cable and emitted. With the power supply 1 described above, the high frequency emitted from the distal end (blades 34, 34) of the shaft 6 or shaft body 72 can be used to cauterize the surgical site, stop bleeding, or perform amputation. The frequency of the high frequency emitted from the distal end of the shaft 6 is preferably between 150 kHz and 10 MHz.

[0107] Alternatively, the power supply can be modified to include a power receiving unit capable of outputting high frequencies by supplying AC power from an AC power source. In this case, the power receiving unit includes at least a converter, a high-frequency oscillator, and a high-frequency amplifier. Furthermore, AC power lines are used as the ring-side power lines 5A and 5B and the shaft-side power lines 9A and 9B, or 9C, 9D, 9E, and 9F. Ring-side power line 5A is configured so that ring-side terminal 4A is connected to the first terminal of the AC power source, and ring-side power line 5B is configured so that ring-side terminal 4B is connected to the second terminal of the AC power source. With ring-side terminals 4A and 4B in contact with shaft-side terminals 8A and 8B, AC power from the AC power source is supplied to power receiving unit 7 via ring-side power lines 5A and 5B, ring-side terminals 4A and 4B, shaft-side terminals 8A and 8B, and shaft-side power lines 9A and 9B, or 9C, 9D, 9E, and 9F. The converter converts the AC power supplied from the AC power source to power receiving unit 7 into DC power. A high-frequency oscillator uses the DC power converted by the converter as a DC power source (driving power source) to oscillate and generate a high frequency. A high-frequency amplifier uses the DC power converted by the converter as a DC power source (driving power source) to amplify the high frequency.

[0108] Alternatively, the power supply can be supplied with high-frequency power generated by a device other than the power supply itself. In this case, with ring-side terminals 4A, 4B in contact with shaft-side ends 8A, 8B, the power supply supplies power from a high-frequency power source to blades 34, 34 of shaft 6 or shaft body 72 via ring-side power supply wires 5A, 5B, ring-side terminals 4A, 4B, shaft-side terminals 8A, 8B, and shaft-side power supply wires 9A, 9B or 9C, 9D, 9E, 9F, thereby heating the contact portions of blades 34, 34. In this case, there is no need to incorporate a high-frequency power source into the power receiving unit.

[0109] Alternatively, the power supply described above can be modified to include a power receiving unit capable of outputting ultrasonic waves by supplying DC power from a DC power supply. In this case, the power receiving unit includes at least an ultrasonic oscillator. Furthermore, DC power supply lines are used as the ring-side power supply lines 5A and 5B and the shaft-side power supply lines 9A and 9B, or 9C, 9D, 9E, and 9F. Ring-side power supply line 5A is configured so that ring-side terminal 4A is connected to the first terminal of the DC power supply, and ring-side power supply line 5B is configured so that ring-side terminal 4B is connected to the second terminal of the DC power supply. Furthermore, with ring-side terminals 4A and 4B in contact with shaft-side terminals 8A and 8B, DC power from the DC power supply is supplied to the power receiving unit 7 via the ring-side power supply lines 5A and 5B, the ring-side terminals 4A and 4B, the shaft-side terminals 8A and 8B, and the shaft-side power supply lines 9A and 9B, or 9C, 9D, 9E, and 9F. The ultrasonic oscillator oscillates using the DC power as a DC power supply (driving power source) to generate ultrasonic waves. In this case, the shaft 6 and the blade 34 are provided with an ultrasonic wave transmission mechanism.

[0110] Alternatively, the power supply can be modified to include a power receiving unit capable of outputting ultrasonic waves by supplying AC power from an AC power source. In this case, the power receiving unit includes at least a converter and an ultrasonic oscillator. Furthermore, AC power lines are used as the ring-side power lines (5A, 5B) and the shaft-side power lines (9A, 9B or 9C, 9D, 9E, 9F). Ring-side power line 5A is configured so that ring-side terminal 4A is connected to the first pole of the AC power source, and ring-side power line 5B is configured so that ring-side terminal 4B is connected to the second pole of the AC power source. Furthermore, with ring-side terminals 4A, 4B in contact with shaft-side terminals 8A, 8B, AC power from the AC power source is supplied to power receiving unit 7 via ring-side power lines 5A, 5B, ring-side terminals 4A, 4B, shaft-side terminals 8A, 8B, and shaft-side power lines 9A, 9B or 9C, 9D, 9E, 9F. The converter converts the AC power supplied from the AC power source to power receiving unit 7 into DC power. The ultrasonic oscillator uses the DC power converted by the converter as a DC power source (driving power source) to oscillate and generate ultrasonic waves. In this case, the shaft 6 and the blade 34 are equipped with an ultrasonic transmission mechanism.

[0111] Furthermore, the functions of shaft 6 or shaft 71 included in the power supply of the present invention are not limited to those described above; a variety of functions can be implemented through power supply. Furthermore, the applications of the power supply of the present invention are not limited to hemostasis applications; they can be extended to various applications depending on the functions of shaft 6 or shaft 71. Furthermore, while the above examples illustrate the provision of power receiving portion 7 at the base end of shaft 6 or shaft body 72, power receiving portion 7 can also be provided at the distal end of shaft 6 or shaft body 72 to supply power, depending on the application of the power supply 1.

[0112] Description of Reference Numerals

[0113] 1, 50, 60, 70: Power supply

[0114] 2: Puncture cannula

[0115] 3. 51: Cylindrical body

[0116] 4A, 4B: Ring terminal

[0117] 5A, 5B: Ring side power supply line

[0118] 6.71: Axis

[0119] 7: Power receiving unit

[0120] 8A, 8B: Shaft side terminal

[0121] 9A, 9B, 9C, 9D, 9E, 9F: Shaft-side power supply lines

[0122] 13: Connecting ring (connecting ring)

[0123] 14: Power supply ring (power supply ring)

[0124] 15, 52: Cylindrical body

[0125] 61: Winding ring (winding ring)

[0126] 72: Shaft body

[0127] 73: Tubular tablet

[0128] 74: First connector

[0129] 75: Second connector

Claims

1. A power supply comprising: The puncture cannula is formed of an insulating material and is cylindrical; a power supply ring formed of an insulating material; a ring-side terminal, arranged on the inner surface of the power supply ring; a ring-side power supply line, connecting the ring-side terminal to a power source; The shaft is inserted into the interior of the power supply ring and the interior of the puncture sleeve in sequence; a power receiving portion, disposed on the shaft; A shaft-side terminal, provided on the outer surface of the shaft; as well as A shaft-side power supply line is provided on the shaft and connects the power receiving unit to the shaft-side terminal. Wherein, as the shaft is inserted into the interior of the power supply ring and the interior of the puncture sleeve, the ring side terminal can be brought into contact with the shaft side terminal. When the ring-side terminal is in contact with the shaft-side terminal, electric power from the power supply can be supplied to the power receiving unit via the ring-side power supply line, the ring-side terminal, the shaft-side terminal, and the shaft-side power supply line.

2. The power supply according to claim 1, wherein: The shaft includes a shaft body and a cylindrical piece. The shaft body is provided with the power receiving portion. The cylindrical piece covers the outside of the shaft body. The shaft-side terminal is provided on the outer surface of the cylindrical piece. A first connector and a first shaft-side power supply line are provided on the shaft body, and the first shaft-side power supply line connects the power receiving unit to the first connector; a second connector and a second shaft-side power supply line are provided on the cylindrical piece, and the second shaft-side power supply line connects the shaft-side terminal to the second connector; by connecting the first connector and the second connector, the power receiving unit can be connected to the shaft-side terminal via the first shaft-side power supply line, the first connector, the second connector, and the second shaft-side power supply line. When the first connector and the second connector are connected, as the shaft is inserted into the interior of the power supply ring and the interior of the puncture cannula, the ring side terminal and the shaft side terminal are brought into contact, thereby enabling power from the power supply to be supplied to the power receiving part via the ring side power supply line, the ring side terminal, the shaft side terminal, the second shaft side power supply line and the first shaft side power supply line.

3. The power supply according to claim 1, wherein: The power supply includes a cylindrical body extending from one end of the puncture cannula, The cylindrical body is formed of an insulating material and comprises a connecting ring, the power supply ring, and a cylindrical body; the connecting ring is mounted on one end of the puncture cannula or is integrally formed with one end of the puncture cannula, thereby being connected to the one end of the puncture cannula; the cylindrical body connects the connecting ring and the power supply ring; The cylindrical body is formed of a stretchable insulating material. The shaft is sequentially inserted into the interior of the cylindrical body and the interior of the puncture cannula. As the shaft is inserted through the interior of the cylindrical body and the interior of the puncture sleeve, the grooves of one of the puncture sleeve side terminal and the shaft side terminal are engaged with the other, thereby enabling the ring side terminal to contact the shaft side terminal. In a state where the ring-side terminal is in contact with the shaft-side terminal, the cylindrical body expands and contracts as the shaft moves.

4. The power supply according to claim 3, wherein: The cylindrical body has a shape in which the diameter decreases toward the power supply ring side.

5. The power supply according to claim 1, wherein: The power supply includes a winding ring formed of an insulating material. The winding ring is connected to one end of the puncture cannula and can be used to wind the ring-side power supply line. The shaft is sequentially inserted into the interior of the power supply ring, the winding ring and the interior of the puncture sleeve.

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