JP2003033366A - Bipolar type medical treatment tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cross-shaft type and bipolar type medical treatment tool that is not only easy to handle but also low-cost. SOLUTION: A supporting part 3 which pivots a crossing part of a crossed first shaft 21 and a second shaft 22 comprises a base member 31 made of an insulating resin, and against X-Y flat face including a fixed part of the first shaft 21, a straight line (rotation axis) P-P which passes a rotation part of the second shaft 22 is offset by F. Then the first shaft 21 and the second shaft 22 are made as electric current circuits of individual poles for high-frequency electric current.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical device, and more particularly, to a pair of shaft intermediate portions of electric scalpels, hemostatic forceps, hemostatic scissors, and other bipolar type medical devices used in surgical operations. The present invention relates to a cross shaft type medical device that supports each other rotatably.

[0002]

2. Description of the Related Art In surgical procedures, electric scalpels and hemostats,
Other medical devices utilizing electric energy are used to perform hemostasis at the same time as a process of incising an affected part and a pressing operation of a tissue or a blood vessel associated with cutting by utilizing a heat generating effect using Joule heat of a high frequency current. A medical device for supplying an electric current to this type of medical device has a monopolar type in which the medical device has only one polarity electrode and the affected part side is the other polarity electrode,
A bipolar type in which the medical device is provided with both electrodes is known.

In particular, the crossed shaft type bipolar medical device has a treatment piece which constitutes a treatment portion at each tip of a pair of shafts, and the treatment piece presses or cuts the affected area at the same time. A high-frequency current is passed between them to stop bleeding. The frequency of the high frequency current used in the medical field is approximately 300 KHz to 5 MHz. The treatment portion provided at each tip of the pair of shafts has a rod shape, a flat plate shape, or a blade shape represented by scissors. A high frequency current is applied between a pair of electrodes arranged directly or close to this treatment portion.

This type of crossed shaft type bipolar medical device is entirely made of a metal material, and at its crossing part (pivotally supporting part), a pair of shafts are rotatably supported by one metal pivoting screw or the like. Has been done. Therefore, if a high-frequency current is supplied to the treatment portion via the shaft, the high-frequency current will be short-circuited at this intersection. Have.

In the conventional crossed shaft type bipolar medical device, the entire shaft is made of ceramics, and an electrode formed of a metal material is integrally fixed only to the treatment portion, or it is detachable from the treatment portion. What is covered with an insulated electrode part is known.

[0006]

However, the one in which the entire shaft is made of ceramics and the electrode made of a metal material is integrally fixed only to the treatment portion is manufactured by an advanced manufacturing method. It is expensive. Further, in the case where the treatment portion is covered with an electrode portion which is detachable and is insulated from the shaft, it is necessary to provide each electrode with a lead wire for feeding power, which is troublesome in handling during a surgical operation and becomes an obstacle to treatment. This was one of the problems to be solved.

An object of the present invention is to provide a cross shaft bipolar medical device which is easy to handle and is low in cost, by using the shaft itself as a power supply path for a high frequency current and as a current supply path for a high frequency current. It is in.

[0008]

In order to achieve the above object, the present invention has a structure in which a pivot portion for pivotally supporting a pair of intersecting shafts electrically insulates the pair of shafts. Can be achieved. A typical configuration of the present invention will be described below with reference to reference numerals of embodiments described later.

(1) A first grip portion 41 having a first terminal 61 for supplying a high-frequency current of one polarity at one end is provided,
The first shaft 21 made of a metal material having one treatment piece 51 of the treatment section 5 for surgical treatment at the other end and the second terminal 62 having the second terminal 62 for supplying the high frequency current of the other polarity to the one end
The second shaft 2 made of a metal material that has the grip portion 42 and has the other treatment piece 52 of the treatment portion 5 for surgical treatment at the other end.
2 of the first shaft 21 and the second shaft 22, and a pivotal support portion 3 that supports the first shaft 21 and the second shaft 22 so as to be rotatable relative to each other. By pressing one treatment piece 51 of the treatment section 5 and the other treatment piece 52 in accordance with an operation with the pivotal support portion 3 as a fulcrum, the first terminal 61 and the second terminal 62 are respectively attached. A bipolar medical device 1 for generating Joule heat between one processing piece 51 of the treatment section 5 and the other processing piece 52 of the treatment section 5 by the supplied high-frequency currents having different polarities. The first shaft 21 and the second
The base member 31 is interposed between the shafts 22 and is made of an insulating material for electrically insulating the first shaft 21 and the second shaft 22 from each other.
Is a first base portion 3 fixed to the first shaft 21.
1A and the second shaft 22 to the first shaft 2
1 has a second base portion 31B which is rotatably supported with respect to 1, and a straight line P-P passing through the rotation center of the second shaft 22 is the first base of the first shaft 21. The first base portion 31 of the first shaft 21 with respect to a straight line Q-Q parallel to a straight line P-P passing through the rotation center of the second shaft 22 through a fixed portion with the portion 31A.
A plane X-Y including a longitudinal direction X-X of the first shaft 21 and a direction Y-Y orthogonal to the longitudinal direction and orthogonal to the longitudinal direction of the first shaft 21 through a fixing portion with A.
To a straight line P- passing through the center of rotation of the second shaft 22
It is characterized in that it is at a position offset to the P side.

With this structure, the pair of shafts (the first shaft 21 and the second shaft 22 are electrically insulated from each other, so that the pair of shafts is a general-purpose metal used in general medical devices). It can be made of material, and each shaft can be used as a feeding path for high-frequency current of positive and negative poles, so that a bipolar medical device which is easy to handle and low in cost can be obtained.

In (2) and (1), the second base portion 31B of the base member 31 that pivotally supports the second shaft 22 is rotatable from the first base portion 31A to the second shaft 22. It is characterized in that it rises to the side of the straight line P-P passing through the center of motion and has a substantially L-shaped cross section that passes through the straight line P-P and is orthogonal to the plane X-Y.

With this structure, when the screw for fixing the second shaft 22 in the second base portion 32A is made of metal, the distance between the metal screw and the first shaft becomes large, and the distance between the two becomes large. The possibility of discharge can be reduced.

(3), (1) or (2), the first shaft 21 for fixing the first shaft 21 to the base member 31, the pivot holes 35, 36 in the first shaft 21,
There are a plurality of sets of fixing holes 37 in the second shaft 22 for fixing the second shaft 22 to the base member 31, and the position of each set of the pivotally supporting portion 3 is set to the first shaft 21 and the first shaft 21. It is characterized in that it can be changed along the longitudinal direction of the two shafts 22.

With this structure, the treatment piece (5
1, 52) depending on the degree of opening angle of the grip portion 4 (41, 4).
The opening / closing stroke between 2) can be changed, and the operability adapted to the treatment size of the target affected area can be improved.

The first shaft 21 and the second shaft 22 are connected to the first base member 31A along the longitudinal direction of the first shaft 21 and the second shaft in (4), (1) or (2). And slits 21B and 22B for inserting fixing screws and pivot screws to be fixed to the second base member 31B, respectively, and the pivot portions 3 of the first shaft 21 and the second shaft 22 in the longitudinal direction thereof. It is characterized in that it can be changed along.

With this structure, the treatment piece (5
1, 52) depending on the degree of opening angle of the grip portion 4 (41, 4).
The opening / closing stroke between 2) can be changed steplessly, and the operability adapted to the treatment size of the target affected area can be further improved.

In (5), (3) or (4), the first shaft 21 has a recess 36C on the first base member 31A side, and the first base member 31A has the first shaft 21 side on the first shaft 21 side. The second base member 32 of the second shaft 22 has a convex portion 31D that engages with the concave portion 36C.
A concave portion 22C is provided on the A side, and a convex portion 31C engaging with the concave portion 22C is provided on the second shaft 21 side of the second base member 31B. Since the concave portion and the convex portion are engaged with each other, the same applies when the concave portion is replaced with the convex portion.

With this structure, the first base member 31A and the first shaft 21, and the second base member 31B and the second shaft 22 can be stably attached.
The above structure may be applied only to the mounting structure of the second shaft.

In any one of (6), (1) to (5), the pivot is provided at a portion of the second shaft 22 provided on the second base portion 31B of the first shaft 21, which is opposed to the pivot support screw 34. It is characterized by having a concave portion for increasing the distance d to the support screw 34.

With this structure, when the pivot screw for pivotally supporting the second shaft 22 in the second base portion 32A is made of metal, the pivot screw made of metal and the first shaft 2 are used.
The interval of 1 becomes large, and the possibility of discharge between the two can be further reduced.

In any one of (7) and (1) to (6), the first grip portion 41 and the first grip portion 41 are provided on at least one of the facing portions of the first grip portion 41 and the first grip portion 42. It is characterized in that an insulating spacer 7 is provided for preventing the contact of the grip portion 42.

The spacing element 7 prevents a short circuit between the grips during operation, avoids the influence of opening to the power source, and prevents an accidental accident to the operator.

The present invention is not limited to the forceps as the treatment section 5, but can be similarly applied to a scissors and other medical devices having a hemostatic function. Further, it goes without saying that other configurations are not limited to the above configurations and the configurations of the embodiments described later, and various modifications can be made without departing from the technical idea of the present invention.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will now be described in detail with reference to the drawings of the embodiments. 1 is a perspective view illustrating a first embodiment of a bipolar medical device according to the present invention. In this embodiment, the present invention is applied to a hemostat. FIG. 2 is a side view of FIG. 1 viewed from the direction of arrow R. Note that FIG. 2B is an enlarged view of the A portion of FIG. Also, FIG. 3 is a top view similarly seen from the direction of arrow S. 1 to 3, reference numeral 2 is a shaft, and
It is composed of a shaft 21 and a second shaft 22, and the first shaft 21 has a pivot portion 3 and fixing screws 32 and 33 for the base member 3.
It is fixed at 1. The second shaft 22 is rotatably supported by the pivot 3 with respect to the first shaft 21 fixed to the base member 31 by pivot screws (rotating screws) 34.

A first terminal 6 for supplying a high-frequency current of one polarity is provided at one end of the first shaft 21 formed of a metal material.
1 has a first grip portion 41, and the other end has one treatment piece 51 of the treatment portion 5 for surgical processing. Further, the second shaft 22 formed of a metal material has a second grip portion 42 provided with a second terminal 62 for supplying a high-frequency current of the other polarity at one end, and a treatment portion for surgical treatment at the other end. 5 has the other treatment piece 52.

The first shaft 21 and the second shaft 22 are
The pivot portions 3 provided in the middle portion intersect each other and are rotatably supported with respect to each other. In addition, "rotatable with respect to each other" means that the second shaft 22 pivotally supported by the base member 3 pivots with respect to the first shaft 21 fixed to the base member 3 of the pivot portion 3. An insulating spacer 7 is provided between at least one of the first grip portion 41 and the second grip portion 42 (on the side of the first grip portion 41 in this embodiment), and the first grip portion 41 is provided. The first grip portion 42 is prevented from contacting with each other to prevent short circuit of high frequency current.

The first grip portion 41 and the second grip portion 42 correspond to one treatment piece 51 of the treatment portion 5 and the other treatment piece 52 of the treatment portion 5 in response to an operation with the pivot portion 3 as a fulcrum. By sandwiching and pressing, the first terminal 61 and the second terminal 6
High-frequency currents having different polarities supplied to the two flow into the affected area, and Joule heat is generated by the resistance of the affected area. Due to the heating action of this Joule heat, hemostasis of the affected area between the one processing piece 51 and the other processing piece 52 is stopped.

The pivot portion 3 has a base member 31 having an L-shaped cross section, which is preferably made of a resin having good insulating properties such as polystyrene or polyethylene. The base member 31 is provided between the first shaft 21 and the second shaft 22. 1st shaft 2 through 31
The first shaft 22 and the second shaft 22 are electrically insulated. The base member 31 integrally has a first base portion 31A fixed to the first shaft 21 and a second base portion 31B that rotatably supports the second shaft 22 with respect to the first shaft 21. . When the concave portion 23 is formed in the opposing portion of the pivotal support portion 3 of the first shaft 21, and the pivotal support screw 34 for fixing the second shaft 22 by the second base portion 32A is made of metal,
The space between the metal pivot screw 34 and the first shaft 21 becomes large, and the possibility of electric discharge between the two can be reduced.

The straight line P-P passing through the center of rotation of the second shaft 22 is the first base portion 31 of the first shaft 21.
Fixation of the first shaft 21 to the first base portion 31A including a straight line Q-Q parallel to a straight line (rotational axis) P-P passing through the rotation center of the second shaft 22 through the fixing portion with A. A rotation center of the second shaft 22 from a plane XY including a longitudinal direction XX of the first shaft 21 passing through the portion and a direction YY orthogonal to the longitudinal direction of the first shaft 21 and orthogonal to the longitudinal direction. It is located at a position offset by F toward the straight line PP passing through. In FIG. 1, the first shaft 21 is in the XX direction.
Longitudinal direction, Y-Y is orthogonal to X-X and the first shaft 2
In the direction orthogonal to the longitudinal direction of 1, the plane X-Y is a plane including X-X and Y-Y and including a straight line Q-Q parallel to the straight line P-P.

The first shaft 21 and the first shaft 2
1. A base member 3 that constitutes a pivotal support along the longitudinal direction of 1.
Other screw holes 35, 36, 37 for changing the position of 1
We have a set of. Although the other sets of screw holes 35, 36, and 37 are shown as one set, two or more sets may be provided.

FIG. 4 is an explanatory view of the base member 31 which constitutes the pivotal support portion in this embodiment. FIG. 4A is a front view,
The same (b) is a sectional view taken along the line D-D of the same (a), the same (c) is a sectional view taken along the line E-E of the same (a), the same (d).
Shows a top view, and (e) shows a bottom view. This base member 3
1 is made of a good electrically insulating resin such as polystyrene or polyethylene. As shown in (b) and (c), the first base portion 31A and the second base portion 31B are integrated and the cross section thereof is substantially L-shaped. Is.

The first shaft 21 is attached to the first base portion 31A.
Has fixing screw holes 35 and 36 for fixing, and the second base portion 31B has a pivoting screw hole 37 for rotatably supporting the second shaft 22. What is a pivot screw?
The second shaft 22 does not separate from the second base portion 31B and performs a predetermined rotation, but both have a function of supporting so as to maintain a predetermined relationship, and at least one of them rotates. Is an unrestrained screw. Note that the number of fixing screw holes provided in the first base portion 31A may be one if the first shaft 21 can be firmly fixed, or three or more. Furthermore, the first
The screw hole provided in the base portion 31A is a through hole, but may be a bottomed screw hole if screwing can be reliably performed with a screw.

FIG. 5 is a sectional view taken along the line BB in FIG. 2 showing the pivotal support portion, and FIG. 6 is a sectional view taken along the line C-B in FIG. 2 showing the pivotal support portion.
It is sectional drawing which followed the C line. As shown in FIG. 5, the second
The shaft 22 is rotatably attached through a pivot screw 34 of a screw hole provided in the second base portion 31B of the base member. On the other hand, as shown in FIG. 6, the first shaft 21 is fixed by fixing screws 32 and 33 which are inserted through two screw holes provided in the first base portion 31A of the base member.

The screw holes 37 provided in the second base portion 31B are the screw holes 35, 36 provided in the first base portion 31A.
It is provided at a position offset by a distance F from.
In addition, the second base portion side of the screw holes 35 and 36 is enlarged,
The nut of the screw does not protrude from the surface so as to prevent the rotation of the second shaft rotatably supported by the second base portion 31B. According to the bipolar medical device described in the above embodiments, the pair of shafts (the first shaft 21 and the second shaft 22) are electrically insulated, so that the pair of shafts is used as a general medical device. It can be composed of a general-purpose metal material used for. Further, each shaft can be used as a power feeding path for high-frequency currents of positive and negative poles, and a bipolar medical device that is easy to handle and low in cost can be obtained.

FIG. 7 is an explanatory view of a base member which constitutes a pivot portion for explaining the second embodiment of the present invention. FIG. 7A is a front view and FIG. 7B is the same as FIG. Sectional drawing which followed the D'-D 'line, the same (c) is a cross section along the E'-E' line of the same (a). The base member 31 has a shape in which the outer diameter of the side on which the second shaft 21 is rotated is substantially curved,
This is to prevent rattling when the second shaft rotates. The other configurations and effects are similar to those described with reference to FIG. Since the pair of shafts 21 and 22 are also electrically insulated by the bipolar medical device described in the present embodiment, the pair of shafts can be made of a general-purpose metal material used for general medical devices. . Further, each shaft can be used as a power feeding path for high-frequency currents of positive and negative poles, and a bipolar medical device that is easy to handle and low in cost can be obtained.

FIG. 8 is an enlarged cross-sectional view of a pivot portion for explaining the third embodiment of the present invention, and FIG. 9 is an explanatory view of the operation of the constitution of FIG. The pivot portion has a base member 31, and the base member 3
The first shaft 21 is fixed to the first base portion 31A side and the second shaft 22 is rotatably supported to the second base portion 31B side. The pivot screw 34 provided on the second base portion 31B projects or is exposed to the first shaft 21 side (not projected, but visible from the first shaft 21 side).

As shown by the dotted line in FIG. 9, the pivot screw 34 (screw head) may be retracted from the surface of the second base portion 31B. However, when the size of the forceps is reduced, the first shaft is still used. The distance d to 21 is close. In this embodiment, a pivotal screw 3 for rotatably fixing the second shaft 22.
4 is provided with a concave portion 23 in a part of the first shaft 21 facing the shaft 4, and the high frequency current of one pole is applied to the pivot screw 3
The distance d between the fourth shaft and the first shaft 21 to which the high frequency current of the other pole is applied is increased to avoid the possibility of discharging the high frequency current between both poles.

FIG. 10 is a schematic view of the essential portions of the first shaft or the second shaft for explaining the third embodiment of the present invention. In the present embodiment, the first shaft 21 or the second shaft 22
Alternatively, a slit 21B or 22B for inserting a fixing screw or a rotating screw is provided in both of them. Then, for example, the first shutter 21 in FIG.
A slit 21B or 22B provided on each shaft with a fixing screw 32 (33) fixed to the base portion 31A and a pivotal screw (rotating screw) 34 rotatably supported on the second base portion 31B of the base member 31. By moving the shafts in the longitudinal direction along the axis, the pivot portion 3 can be changed steplessly.

FIG. 11 is an explanatory view of the engaging portion of the base member and each shaft for explaining the fourth embodiment of the present invention. The first base portion 31A of the base member 31 has a concave portion 31C on the first shaft 21 side, and the second base portion 31B has a convex portion 31D on the second shaft 22 side. In the portion of the first shaft 21 that is fixed to the first base portion 31A, there is a convex portion 21A that engages with the concave portion 31C, and in the second shaft 22.
A concave portion 22D that engages with the convex portion 31D is formed in the portion fixed to the second base portion 31B.

At least the convex portion 31D and the concave portion 22
D is circular so that the second shaft 22 can rotate with respect to the base member 31. Projection 21A and recess 31
The shape of C is not limited to a circle, and may be an ellipse, a triangle, a quadrangle, a polygon, or another irregular shape. The above-mentioned arrangement of each concave portion and each convex portion may be reversed. The fixing screw and the turning screw are not shown. The above-mentioned recesses and protrusions that engage with each other may be replaced with each other by the forming members (base side and shaft side).

FIG. 12 is an explanatory view of an engaging portion of a base member and a first shaft for explaining a fifth embodiment of the present invention, and FIG. 13 is a base member and a second shaft for explaining a fifth embodiment of the present invention. FIG. 14 is an explanatory view of an engaging portion, FIG. 14 is a side view of an essential part of a first shaft, and FIG. 15 is a side view of an essential part of a second shaft. Figure 1
2, the first shaft 21 has the slit 21B shown in FIG. 14 similar to that described with reference to FIG. 10, and a recess 36C is formed so as to surround the two fixing screws 32 and 33.

On the side of the first base portion 31A of the base member 31, a convex portion 31D that engages with the concave portion 36C is formed. The concave portion 36C and the convex portion 31D as a set form the first shaft
One or more are arranged in one longitudinal direction. The first shaft 21 is integrally fixed to the base member 31 by engaging the concave portion 36C and the convex portion 31D with each other and screwing them together, and the position thereof is also variable along the slit 21B.

On the other hand, as shown in FIG. 13, the second shaft 22 also has the slit 22B shown in FIG. 15 similar to that described with reference to FIG. 10 and is formed with a circular recess 22D. A circular convex portion 31C is formed on the side of the second base portion 31B of 31. One set or a plurality of sets of the recesses 22D and 31C are arranged in the longitudinal direction of the second shaft 22 corresponding to the set of the recesses 36C and the projections 31D. Then, the second shaft 22 is rotatably supported with respect to the base member 31 by engaging the convex portion 31C with the concave portion 22D and attaching the convex portion 31C with the rotary screw 34. According to the present embodiment, the pivot portion can be set at a determined position in the longitudinal direction of each shaft, and the opening degree of the treatment portion described in the first embodiment can be adjusted. In addition, in each of the above-described embodiments, the concave portion, the convex portion, and the slit may be formed on only one of the shafts. Further, the above-mentioned recesses and protrusions that engage with each other may be exchanged with each other by the forming members (base side, shaft side).

FIG. 16 is a perspective view of a base member for explaining the sixth embodiment of the present invention. The base member 31 of this embodiment is a cube or a thick rectangular plate as a whole, and does not have a step between the first base portion 31A and the second base portion 31B as described in each of the above embodiments. In the base member of the present embodiment, the screw holes 35-36 for inserting the fixing screw for fixing the first shaft 21 and the screw hole 37 for inserting the pivotal screw for rotatably supporting the second shaft 22 are provided. It is offset by F as in the example. However, when the size of the entire base member is the same, the distance between the screw inserted through the screw hole 37 and the first shaft 21 becomes smaller than that of the base member in each of the above-described embodiments. Therefore, this base member is applied to a medical device in which the voltage value of the high frequency current is relatively low. Further, the base member 31 is not limited to a cube or a thick rectangular plate shape, but a cylindrical shape,
It may be disk-shaped or polygonal.

The respective embodiments of the present invention described above may be combined as appropriate. Furthermore, the pair of shafts and each screw in each embodiment can use an existing metal material, an existing shape without special processing, and the base member is also a material having a good insulating property. Since the existing resin can be used, it is possible to obtain a cross shaft type bipolar medical device which is low in cost and good in operability.

[0046]

As described above, according to the present invention,
Since the shaft itself can be used as a power supply path for high frequency current, there is no need to separately provide a power supply path for high frequency current as in the conventional medical device of this type, and the entire shaft is simplified and has good workability. The bipolar medical device can be provided at a low price.

[0047]

[Brief description of drawings]

FIG. 1 is a perspective view illustrating a first embodiment of a bipolar medical device according to the present invention.

FIG. 2 is a side view of the bipolar medical device according to the first embodiment of the present invention, viewed from the direction of arrow R in FIG.

FIG. 3 is a top view of the bipolar medical device according to the first embodiment of the present invention viewed from the direction of arrow S in FIG.

FIG. 4 is an explanatory view of a base member constituting the pivotal support portion of FIG. 1 for explaining the first embodiment of the bipolar medical device according to the present invention.

FIG. 5 is a cross-sectional view taken along line BB of FIG. 2 showing a pivotal support portion for explaining the first embodiment of the bipolar medical device according to the present invention.

FIG. 6 is a cross-sectional view taken along the line C-C of FIG. 2, showing a pivotal support portion for explaining the first embodiment of the bipolar medical device according to the present invention.

FIG. 7 is an explanatory diagram of a base member that constitutes a pivotal support portion for explaining a second embodiment of the present invention.

FIG. 8 is an enlarged cross-sectional view of a pivotal portion for explaining a third embodiment of the present invention.

FIG. 9 is an explanatory view of the operation of the configuration of FIG. 8 for explaining the third embodiment of the present invention.

FIG. 10 is a main part configuration diagram of a first shaft or a second shaft for explaining a third embodiment of the present invention.

FIG. 11 is an explanatory diagram of an engaging portion between a base member and each shaft for explaining a fourth embodiment of the present invention.

FIG. 12 is an explanatory diagram of an engaging portion between a base member and a first shaft for explaining a fifth embodiment of the present invention.

FIG. 13 is an explanatory view of an engaging portion between a base member and a second shaft for explaining a fifth embodiment of the present invention.

FIG. 14 is a side view of an essential part of a first shaft for explaining a fifth embodiment of the present invention.

FIG. 15 is a side view of a main portion of a second shaft for explaining a fifth embodiment of the present invention.

FIG. 16 is a perspective view of a base member for explaining a sixth embodiment of the present invention.

[Explanation of symbols]

2 ... Shaft, 21 ... First shaft, 22
.... Second shaft, 3 ... Pivot part, 5 ...
Processing part, 51 ... One treatment piece, 52 ... Other processing piece, 4 ... Grip part, 41 ... First grip part, 42 ... Second grip part , 6 ..., terminal, 61 ..
... First terminal, 61 ... First terminal, 62 ...
Second terminal, 7 ... Spacer.

Claims (7)

[Claims] 1. A metal material having a first grip portion having a first terminal for supplying a high-frequency current of one polarity at one end and one treatment piece of a treatment portion for surgical treatment at the other end. First
A shaft and a second grip part having a second terminal for supplying a high-frequency current of the other polarity at one end, and a second treatment piece of a treatment portion for surgical treatment at the other end; And a pivotal support portion that has a shaft and that rotatably supports the first shaft and the second shaft so that the intermediate portions of the first shaft and the second shaft intersect with each other, and the pivotal support portions of the first grip portion and the second grip portion are fulcrums. By pressing one treatment piece of the treatment section and the other treatment piece of the treatment section according to the operation described above, the treatment is performed by high-frequency currents having different polarities supplied to the first terminal and the second terminal, respectively. A bipolar medical device for generating Joule heat between one processing piece of one part and the other processing piece, wherein the pivotal support part is interposed between the first shaft and the second shaft. The first shaft and the second shaft are electrically connected A base member made of an insulating material for insulating the first base member from the first shaft fixed to the first shaft.
A base portion and a second base portion that rotatably supports the second shaft with respect to the first shaft are integrally formed, and a straight line passing through a rotation center of the second shaft is the first base portion. The second shaft is passed through a fixed part of the first shaft and the first base part.
With respect to a straight line parallel to the straight line passing through the rotation center of the shaft, it passes through a fixed portion of the first shaft with the first base portion, and the longitudinal direction of the first shaft and the orthogonal direction to the longitudinal direction. A bipolar medical device characterized in that the bipolar medical device is located at a position offset from a plane including a direction orthogonal to the longitudinal direction of the first shaft to a straight line passing through the rotation center of the second shaft. 2. The second base portion of the base member that pivotally supports the second shaft is erected from the first base portion to a straight side passing through a rotation center of the second shaft, The bipolar medical device according to claim 1, wherein a cross section passing through the straight line and orthogonal to the plane is substantially L-shaped. 3. A pivot hole formed in the first shaft for fixing the first shaft to the base member, and a second supporting hole for fixing the second shaft to the base member.
3. A plurality of fixing holes provided in the shaft are provided, and the position of each set of the pivotally supporting portions can be changed along the longitudinal direction of the first shaft and the second shaft. The bipolar medical device described in. 4. The first shaft and the second shaft along the longitudinal direction of the first shaft and the second shaft.
A slit for inserting a fixing screw for fixing the shaft to the first base member and the second base member and a pivotal screw for rotatably supporting the shaft;
The bipolar medical device according to claim 1 or 2, wherein the shaft and the pivotal support portion of the second shaft are changeable along their longitudinal direction. 5. A recess is provided on the side of the first base member of the first shaft, and a projection or a recess that engages with the recess is provided on the side of the first shaft of the first base member, Two shafts have a concave portion or a convex portion on the side of the second base member, and have a convex portion or a concave portion that engages with the concave portion or the convex portion on the second shaft side of the second base member. The bipolar medical device according to claim 3 or 4. 6. A recessed portion for increasing a distance d from the pivotal screw is provided in a portion of the first shaft opposite to the pivotal screw provided in the second base portion of the first shaft. The bipolar medical device according to any one of claims 1 to 5, which is characterized. 7. A spacer for preventing contact between the first grip portion and the first grip portion is provided on at least one of the first grip portion and a facing portion of the first grip portion. The bipolar medical device according to any one of claims 1 to 6.