Instrument for electric cautery operation

Abstract

The invention relates to an instrument for an electric cautery operation, in particular to an instrument for an electric cautery operation, which can be manually operated to be used for laparoscopic surgery or various surgeries. According to one embodiment of the present invention, provided is an instrument for an electrocautery operation, comprising: a tip tool which includes one or more jaws and is formed so as to be rotatable in two or more directions; a connection part which is formed by extending in a first direction (X-axis) and to which the tip tool is coupled at one end; one end part of the lead wire is connected with the end tool; a shrink tube into which the other end of the wire, which is opposite to the end connected to the tip tool, is inserted; and a shaft tube into which the other end portion of the shrink tube opposite to the end portion into which the lead wire is inserted is inserted, in which the lead wire and the shaft tube are separated by the shrink tube so that the lead wire and the shaft tube are insulated from each other.

Description

Technical Field

[0001] The present invention relates to an instrument for electrocautery surgery, in particular to an instrument for electrocautery surgery with improved insulation performance, which is a surgical instrument installed on a robot arm or can be manually operated for laparoscopic surgery or various surgeries. Background Art

[0002] In many cases, surgical procedures require cutting and joining of body tissues, including organs, muscle tissues, connective tissues, and blood vessels. For centuries, cutting and joining have been performed using sharp blades and sutures. However, during surgical procedures, cutting body tissues, especially relatively highly vascularized tissues, can induce bleeding. Therefore, doctors have always needed a surgical instrument and method to slow or reduce bleeding during surgical procedures.

[0003] Recently, it has become possible to perform certain surgical procedures with electrosurgical instruments that use electrical energy. For example, in surgical instruments such as graspers, scissors, forceps, blades, needles, and hooks, electrosurgical instruments have been developed that include one or more electrodes that are configured to provide electrical energy. The electrical energy provided by the electrodes can be used to coagulate, bind, or cut a patient's body tissue. In particular, when using electrical energy, it may be possible to perform cutting and hemostasis simultaneously.

[0004] Electrosurgical instruments are generally classified into two types: monopolar and bipolar. In a monopolar electrosurgical instrument, electrical energy of a specific polarity is supplied to one or more electrodes of the instrument. Also, electricity of a different polarity is electrically connected to the patient. In a bipolar electrosurgical instrument, one or more electrodes are electrically connected to a first polarity power source, and one or more electrodes are electrically connected to a second polarity power source opposite to the first polarity.

[0005] The above-mentioned background technology is technical information possessed by the inventor in order to derive the present invention or technical information obtained in the process of deriving the present invention, and is not necessarily known technology disclosed to the public before applying for the present invention. Summary of the invention

[0006] The object of the present invention is to provide an electrocautery surgical instrument with improved insulation performance, which is a surgical instrument installed on a robot arm or can be manually operated for laparoscopic surgery or various surgeries.

[0007] An embodiment of the present invention provides an instrument for electrocautery surgery, characterized in that it includes: an end tool, which includes one or more jaws and is formed to be rotatable in two or more directions; a connecting portion, which is extended along a first direction (X-axis) and is combined with the end tool at one end thereof; a wire, one end of which is connected to the end tool; a shrinkable tube, into which the other end of the wire opposite to the end connected to the end tool is inserted; and a shaft tube, into which the other end of the shrinkable tube opposite to the end into which the wire is inserted is inserted, wherein the wire is separated from the shaft tube by the shrinkable tube, so that the wire and the shaft tube are insulated from each other.

[0008] The present invention is characterized in that the other end of the wire is not exposed outside the other end of the shrinkable tube.

[0009] The present invention is characterized in that a region where the conductive wire, the shrink tube, and the shaft tube overlap is crimped.

[0010] The present invention is characterized in that when the wire is inserted into the shrinkable tube, the shrinkable tube is heated and shrunk, so that the shrinkable tube and the wire are tightly combined.

[0011] The present invention is characterized in that it further comprises an operating portion that controls the rotation of the end tool in the two or more directions, wherein the operating portion is coupled to the other end portion of the connecting portion.

[0012] In the present invention, the shaft tube is characterized in that the guide wire on the end tool side and the guide wire on the operation portion side are connected.

[0013] The present invention is characterized in that the shaft tube is arranged in the connecting portion.

[0014] The present invention is characterized in that the conductive wire is not in direct contact with the shaft tube.

[0015] In the present invention, the guide wire, the shrinkable tube, and the axial tube are each provided in plural numbers, and the guide wires and the axial tubes are formed so as not to directly face each other in any operating state.

[0016] In the present invention, it is characterized in that it further includes an electric wire connected to the jaws to provide electric energy to the jaws, wherein when electric energy flows in the electric wire through the shrink tube, the voltage induced in the shaft tube is prevented from being transmitted to the wire.

[0017] The present invention is characterized in that the entirety of the conductive wire is formed within the shrinkable tube.

[0018] In the present invention, it is characterized in that the end tool includes: an end tool center, which is rotatably connected to the end tool jaw pulley combined with the jaw; and a pitch center, which is connected to the end tool center axis through a rotating axis connected to one end of the end tool center, wherein the end tool center and the pitch center include insulators.

[0019] The present invention is characterized in that all surfaces of the end tool center and the pitch center are formed of insulating material.

[0020] In the present invention, it is characterized in that the end tool includes: an end tool center, which is rotatably coupled to an end tool jaw pulley coupled to the jaw; a pitch pulley, whose axis is coupled to a pitch rotation axis formed at one end of the end tool center; a pitch wire, which is wound around the pitch pulley; and a fastener, which is coupled to the pitch wire to couple the pitch pulley with the pitch wire, wherein the end tool center is separated from the fastener by the pitch pulley, thereby insulating the end tool center and the fastener from each other.

[0021] In the present invention, wherein the pitch wire is formed as a single wire, and the fastener is fastened to a portion of the pitch wire.

[0022] The present invention is characterized in that the pitch pulley includes an insulator.

[0023] In the present invention, the pitch pulley includes at least one or more coupling parts for fixing the pitch pulley to the center of the end tool.

[0024] In the present invention, it is characterized in that the fastener does not directly contact the center of the end tool.

[0025] Another embodiment of the present invention provides an instrument for electrocautery surgery, comprising: an end tool, which includes one or more jaws and is formed to be rotatable in two or more directions; a connecting portion, which is extended along a first direction (X axis) and is combined with the end tool at one end thereof; and

[0026] A wire, one end of which is connected to the end tool, wherein the end tool includes: an end tool center, which is formed to accommodate at least a portion of the jaws inside; a pitch center, which is combined with the end tool center axis so as to be relatively rotatable relative to the end tool center; an intermediate tube, which extends and is combined along the length direction of the pitch center and is between the pitch center and the connecting portion; and a cover, which wraps at least a portion of the end tool including the jaws.

[0027] In the present invention, the cover comprises insulating material.

[0028] The present invention is characterized in that the cover forms wrinkles in a certain area where the end tool undergoes a pitching motion.

[0029] In the present invention, it is characterized in that the cover is formed obliquely to reduce the diameter of the end portion on the proximal end portion side.

[0030] In the present invention, it is characterized in that the pitch center includes a third pin and a fourth pin, wherein the third pin is formed to be combined with the end tool center axis, the fourth pin is formed on one side of the third pin, and the cover is formed with a fold in an area adjacent to the fourth pin.

[0031] In the present invention, it is characterized in that one or more cover combining parts are formed on the intermediate tube, and one or more grooves combined with the cover combining parts are formed on the cover.

[0032] In the present invention, it is characterized in that the diameter of the body of the cover is formed to be smaller than the diameter of the body of the intermediate tube to a certain extent.

[0033] In the present invention, it is characterized in that it further includes: a shrinkable tube, into which the other end of the wire opposite to the end connected to the end tool is inserted; and an axis tube, into which the other end of the shrinkable tube opposite to the end into which the wire is inserted is inserted, wherein the shrinkable tube separates the wire from the axis tube, thereby insulating the wire from the axis tube.

[0034] The present invention is characterized in that the other end of the wire is not exposed outside the other end of the shrinkable tube.

[0035] The present invention is characterized in that a region where the conductive wire, the shrink tube, and the shaft tube overlap is crimped.

[0036] The present invention is characterized in that the conductive wire is not in direct contact with the shaft tube.

[0037] In the present invention, further included is an electric wire connected to the jaws to provide electric energy to the jaws, wherein when electric energy flows in the electric wire through the shrink tube, the voltage induced in the shaft tube is prevented from being transmitted to the wire.

[0038] In the present invention, it is characterized in that the jaw includes: a first jaw; and a second jaw, which is rotatably combined with the first jaw, wherein the first jaw and the second jaw respectively include a clamping portion, an extension portion extending from the clamping portion in one direction, and a combining portion formed at one end of the extension portion, and the end tool side end of the cover is formed to cover at least a portion of the extension portion of the first jaw and the extension portion of the second jaw.

[0039] In the present invention, the first jaw and the second jaw are combined via a shaft passing through their respective combined portions, and the extended portion of the first jaw is combined with the extended portion of the second jaw in an intersecting manner.

[0040] The present invention is characterized in that when the first jaw and the second jaw are closed, the extension portion of the first jaw intersects with the extension portion of the second jaw in an X-shape.

[0041] In the present invention, it includes: a jaw rotation axis, which is inserted through the first jaw and the second jaw to become the rotation center of the first jaw and the second jaw; and an intersection, which makes the extension of the first jaw and the extension of the second jaw intersect in an X shape when the first jaw and the second jaw are closed, wherein the intersection is formed to be separated from the jaw rotation axis.

[0042] Another embodiment of the present invention provides an instrument for electrocautery surgery, comprising: an end tool, which includes one or more jaws and is formed to be rotatable in two or more directions; a connecting portion, which is extended along a first direction (X axis) and is combined with the end tool at one end thereof; and

[0043] A wire, one end of which is connected to the end tool, wherein the jaws include: a first jaw; and a second jaw, which is rotatably combined with the first jaw, wherein the first jaw and the second jaw respectively include a clamping portion, an extension portion extending from the clamping portion in one direction, and a combining portion formed at one end of the extension portion, the first jaw and the second jaw are combined by an axis passing through their respective combining portions, and the extension portion of the first jaw is combined with the extension portion of the second jaw in an intersecting manner.

[0044] The present invention is characterized in that when the first jaw and the second jaw are closed, the extension portion of the first jaw intersects with the extension portion of the second jaw in an X-shape.

[0045] In the present invention, it includes: a jaw rotation axis, which is inserted through the first jaw and the second jaw to become the rotation center of the first jaw and the second jaw; and an intersection, which makes the extension of the first jaw intersect with the extension of the second jaw in an X shape when the first jaw and the second jaw are closed, wherein the intersection is formed to be separated from the jaw rotation axis.

[0046] In the present invention, it is characterized in that it further includes a cover that wraps around the outside of the configuration between the jaws and the connecting portion, wherein the entrance portion of the cover is arranged adjacent to the intersection where the extension portion of the first jaw intersects the extension portion of the second jaw.

[0047] In the present invention, the cover comprises insulating material.

[0048] The present invention is characterized in that the cover forms wrinkles in a certain area where the end tool undergoes a pitching motion.

[0049] In the present invention, it is characterized in that the cover is formed obliquely to reduce the diameter of the end portion on the proximal end portion side.

[0050] In the present invention, the clamping portion and the extension portion form a predetermined angle, and when the first jaw and the second jaw are closed, the clamping portion is based on a surface that is in contact with each other, and the extension portion adjacent to the joint of the second jaw and the clamping portion of the first jaw are located on one side of the one surface, and the extension portion adjacent to the joint of the first jaw and the clamping portion of the second jaw are located on the other side of the one surface.

[0051] The present invention is characterized in that it includes: a first jaw pulley, which is combined with the first jaw and is formed to be rotatable around a first axis; and a second jaw pulley, which is combined with the second jaw and is formed to be rotatable around the first axis, wherein the first axis is a jaw pulley rotation axis inserted through the first jaw pulley and the second jaw pulley to become the rotation center of the first jaw pulley and the second jaw pulley, and when the first jaw pulley and the second jaw pulley rotate around the jaw pulley rotation axis, the jaw rotation axis moves relative to the jaw pulley rotation axis.

[0052] In the present invention, it is characterized in that a movable coupling hole is formed on the first jaw or the second jaw, and an axis coupling portion is formed on the first jaw pulley or the second jaw pulley, so that when the axis coupling portion is inserted into the movable coupling hole, the axis coupling portion is formed to be able to move to a certain extent inside the movable coupling hole.

[0053] In the present invention, it is characterized in that when the first jaw and the second jaw are closed, the jaw rotating axis moves toward the distal end direction of the end tool, and when the first jaw and the second jaw are opened, the jaw rotating axis moves toward the proximal end direction of the end tool.

[0054] In the present invention, it is characterized in that it further includes: a shrinkable tube, into which the other end of the wire opposite to the end connected to the end tool is inserted; and an axis tube, into which the other end of the shrinkable tube opposite to the end into which the wire is inserted is inserted, wherein the shrinkable tube separates the wire from the axis tube, thereby insulating the wire from the axis tube.

[0055] The present invention is characterized in that the other end of the wire is not exposed outside the other end of the shrinkable tube.

[0056] The present invention is characterized in that a region where the conductive wire, the shrink tube, and the shaft tube overlap is crimped.

[0057] The present invention is characterized in that the conductive wire is not in direct contact with the shaft tube.

[0058] Another embodiment of the present invention provides an instrument for electrocautery surgery, characterized in that it includes: an end tool, which includes one or more jaws and is formed to be rotatable in two or more directions; a connecting portion, which extends along a first direction (X-axis) and is combined with the end tool at one end thereof; and a wire, one end of which is connected to the end tool, wherein the wire is a fully coated electric wire that transmits power to the end tool and transmits electrical energy to the jaws through the wire.

[0059] The present invention is characterized in that it further comprises an operating portion that controls the rotation of the end tool in the two or more directions, wherein the operating portion is coupled to the other end portion of the connecting portion.

[0060] In the present invention, it is characterized in that the guide wire is a power transmission part connected to the operating part to transmit the rotation of the operating part to the jaws.

[0061] The present invention is characterized in that the jaws are formed as conductors.

[0062] In the present invention, it is characterized in that the wire includes a fastening region as a portion of one end from which a sheath has been removed, and the fastening region contacts a portion of the jaws to transmit electric energy to the jaws through the wire.

[0063] In the present invention, the conductive wire is provided in the end tool and the connecting portion, and a portion other than the fastening region is coated.

[0064] In the present invention, it is characterized in that the conducting wire is formed as a single electric wire, and the fastener is bonded to a portion of a middle point of the single electric wire from which the covering has been removed.

[0065] In the present invention, it is characterized in that the fastener is crimped to be fixed to the wire, and the covered electric wire is formed on the wire on both sides with the fastener as the center.

[0066] In the present invention, it is characterized in that the end tool includes an end tool jaw pulley which accommodates at least a part of the jaw, wherein the end tool jaw pulley is formed of an insulator.

[0067] In the present invention, it is characterized in that the conductive wire is wound around the end tool jaw pulley so as to extend toward the connecting portion side.

[0068] Another embodiment of the present invention provides a method for manufacturing an electrocautery surgical instrument, comprising the following steps: inserting the other end of the wire into a shrinkable tube; tightly combining the shrinkable tube and the wire while heating the shrinkable tube; inserting the other end of the shrinkable tube opposite to the end into which the wire is inserted into a shaft tube;

[0069] The wire, the shrink tube and the shaft tube are crimped together.

[0070] In the present invention, it is characterized in that, in the step of inserting the other end portion of the wire into the shrinkable tube, the other end portion of the wire does not protrude outside the other end portion of the shrinkable tube.

[0071] In the present invention, it is characterized in that, in the step of crimping the conductive wire, the shrinkable tube, and the shaft tube together, a region where the conductive wire, the shrinkable tube, and the shaft tube overlap is crimped.

[0072] In the present invention, the following steps are further included:

[0073] One end of the guide wire is connected to a distal end tool; and one end of the shaft tube is connected to the guide wire on the operation part side.

[0074] The present invention is characterized in that the conductive wire is not in direct contact with the shaft tube.

[0075] In the present invention, the guide wire, the shrinkable tube, and the axial tube are each provided in plural numbers, and the guide wires and the axial tubes are formed so as not to directly face each other in any operating state.

[0076] In the present invention, it further comprises an electric wire connected to the jaws to provide electric energy to the jaws, wherein when electric energy flows in the electric wire through the shrink tube, the voltage induced in the shaft tube is prevented from being transmitted to the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the inventive concept.

[0078] Figure 1a This is a conceptual diagram of the pitch motion of existing surgical instruments. Figure 1b This is a conceptual diagram of the yaw action.

[0079] Figure 1c This is a conceptual diagram of the pitch motion of another existing surgical instrument. Figure 1d This is a conceptual diagram of the yaw action.

[0080] Figure 1e is a conceptual diagram of the pitch motion of the surgical instrument according to the present invention, Figure 1f This is a conceptual diagram of the yaw action.

[0081] Figure 2 is a perspective view showing an instrument for electrocautery surgery according to a first embodiment of the present invention.

[0082] Figure 3 yes Figure 2 Side view of an instrument used for electrocautery surgery.

[0083] Figure 4 and Figure 5 It is shown Figure 2 A perspective view of a distal end tool of an instrument for electrocautery surgery.

[0084] Figure 6 It is shown Figure 4 An enlarged perspective view of the center of the distal tool of an electrocautery surgical instrument.

[0085] Figure 7 It is shown Figure 6 An enlarged perspective view of another embodiment of an end tool center.

[0086] Figure 8 It is shown Figure 7 A front view of the guide member.

[0087] Fig. 9 and Fig.10 It is shown Figure 2 A plan view of the end tool of an instrument for electrocautery surgery.

[0088] Fig.11 and Fig.12 It is shown Figure 2 A perspective view of an operating portion of an instrument for electrocautery surgery.

[0089] Fig.13 The structure is only schematically shown. Figure 2 A diagram showing the configuration of pulleys and guide wires of a joint of an instrument for electrocautery surgery is shown.

[0090] Figures 14 to 16 is only shown schematically Figure 2 FIG. 2 is a diagram showing a wire connection arrangement in a connection portion of an electrocautery surgical instrument.

[0091] Fig.17 It is shown Fig.16 FIG. 2 is a diagram of another variation of the embodiment disclosed in FIG.

[0092] Fig.18 and Fig.19 1 is a perspective view showing a distal end tool of an instrument for electrocautery surgery according to a second embodiment of the present invention.

[0093] Fig. 20 1 is a perspective view showing the tip tool center and the pitch center of the electrocautery surgical instrument according to the third embodiment of the present invention.

[0094] Fig.21a and Figure 21b 1 is a perspective view showing a distal end tool of an instrument for electrocautery surgery according to a fourth embodiment of the present invention, Fig.21c It is shown Fig.21a and Figure 21b A perspective view of the insulating pulley of the end tool shown in FIG. Fig.21d It is shown Fig.21a and Figure 21b A perspective view of the center of the end tool shown in .

[0095] Fig. 22 1 is a diagram showing a connection arrangement of a jaw pulley and a guide wire in a tip tool of an electrocautery surgical instrument according to a fifth embodiment of the present invention.

[0096] Fig.23 1 is a perspective view showing an instrument for electrofulguration surgery according to a sixth embodiment of the present invention.

[0097] Fig.24 yes Fig.23 Side view of an instrument used for electrocautery surgery.

[0098] Figure 25 to Figure 27 It is shown Fig.23 A perspective view of a distal end tool of an instrument for electrocautery surgery.

[0099] Fig.28 It is shown Fig.26 An exploded perspective view of the end tool center, pitch center, intermediate tube and axis, etc. shown in FIG.

[0100] Fig.29 It is shown Fig.26 An enlarged perspective view of the center of the distal tool of an electrocautery surgical instrument.

[0101] Fig.30 It is shown Fig.26 An enlarged perspective view of an intermediate tube of an electrocautery surgical instrument.

[0102] Fig.31 It is shown Fig.26 An exploded perspective view of a jaw combination structure of an electrocautery surgical instrument.

[0103] Fig.32 It is shown Fig.31 Plan view of the first jaw.

[0104] Fig.33 It is shown Fig.31 A plan view of the second jaw.

[0105] Fig.34a and Fig.34b It is shown Fig.29 A plan view of a combination of a first jaw and a second jaw.

[0106] Fig.35a and Fig.35b This is a diagram showing jaws of a conventional structure of an electrocautery surgical instrument.

[0107] Fig.36a and Fig.36b It is shown Fig.23 Diagram of the jaws of an instrument used for electrocautery surgery.

[0108] Fig.37a and Figure 37b It is shown Fig.23 Figure 1. A cover for an electrocautery instrument.

[0109] Fig.38a and Figure 38b It is shown Fig.23 Figure 2 shows the end tool of an instrument used in electrocautery surgery.

[0110] Fig.39 and Fig.40 It is shown Fig.23 A perspective view of the yaw motion of an instrument used in electrocautery surgery.

[0111] Fig.41 and Fig.42 It is shown Fig.23 A perspective view of the pitching action of an instrument used in electrocautery surgery.

[0112] Fig.43 It is shown Fig.23 A perspective view of the yaw-pitch motion of an instrument used in electrocautery surgery.

[0113] Fig.44 1 is a perspective view showing an instrument for electrofulguration surgery according to a seventh embodiment of the present invention.

[0114] Fig.45 It is shown Fig.44 Side view of an instrument used for electrocautery surgery.

[0115] Fig.46 and Fig.47 It is shown Fig.44 A perspective view of a distal end tool of an instrument for electrocautery surgery. DETAILED DESCRIPTION

[0116] Since the present invention can be modified in various ways and has a variety of embodiments, specific embodiments will be shown in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that all changes, equivalents and substitutes included in the concept and technical scope of the present invention are included. When describing the present invention, if it is determined that the specific description of the relevant known technology may obscure the main purpose of the present invention, that part of the specific description will be omitted.

[0117] Terms such as first and second, etc. may be used to describe various constituent elements, but the constituent elements should not be limited by the terms. The terms are only used to distinguish one constituent element from another constituent element.

[0118] The terms used in this application are only used to describe specific embodiments and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "including" or "having" and the like are intended to indicate the presence of features, numbers, steps, actions, constituent elements, parts or combinations thereof described in the specification, and should be understood as not excluding in advance the possibility of the presence or addition of one or more other features or numbers, steps, actions, constituent elements, parts or combinations thereof.

[0119] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description in conjunction with the accompanying drawings, the same or corresponding components are marked with the same reference symbols and repeated descriptions thereof are omitted.

[0120] In addition, it should be understood that when describing the various embodiments of the present invention, it is not necessary to describe or implement each embodiment separately, and the technical ideas described in each embodiment can be described or implemented in combination with other separately described embodiments.

[0121] One feature of the electrocautery surgical instrument according to the present invention is that when the operating portion is rotated in any direction for at least one or more of pitch, yaw and actuation, the end tool rotates in the direction intuitively the same as the operating direction of the operating portion.

[0122] Figure 1a This is a conceptual diagram of the pitch motion of existing surgical instruments. Figure 1b This is a conceptual diagram of the deflection action.

[0123] See also Figure 1a The conventional surgical instrument is formed as follows when performing a pitching action: when the end tool 120a is formed at a position forward of the end tool rotation center 121a and the operating part 110a is formed at a position backward of the operating part rotation center 111a, when the operating part 110a is rotated in the clockwise direction, the end tool 120a also rotates in the clockwise direction, and when the operating part 120a is rotated in the counterclockwise direction, the end tool 120a also rotates in the counterclockwise direction. On the one hand, see Figure 1b , the conventional surgical instrument is formed as follows when performing a deflection action: when the end tool 120a is formed at a position forward of the end tool rotation center 121a, and the operating part 110a is formed at a position backward of the operating part rotation center 111a, when the operating part 110a is rotated in the clockwise direction, the end tool 120a also rotates in the clockwise direction, and when the operating part 120a is rotated in the counterclockwise direction, the end tool 120a also rotates in the counterclockwise direction. In this case, from the user's left and right direction, when the user moves the operating part 110a to the left, the end tool 120a moves to the right, and when the user moves the operating part 110a to the right, the end tool 120a moves to the left. As a result, since the user's operation direction is opposite to the movement direction of the end tool, it may cause the user's mistake, and there is a problem that the user's operation is not easy.

[0124] Figure 1c This is a conceptual diagram of the pitch motion of another existing surgical instrument. Figure 1d This is a conceptual diagram of the deflection action.

[0125] See also Figure 1c, a part of the existing surgical instruments is formed in a mirror-symmetrical form, so when performing a pitch action, it is formed as follows: when the end tool 120b is formed in a position forward of the end tool rotation center 121b, and the operating part 110b is formed in a position backward of the operating part rotation center 111b, when the operating part 110b is rotated in the clockwise direction, the end tool 120b rotates in the counterclockwise direction, and when the operating part 110b is rotated in the counterclockwise direction, the end tool 120b rotates in the clockwise direction. In this case, from the perspective of the rotation direction of the operating part and the end tool, the rotation direction of the operating part 110b rotated by the user and the rotation direction of the end tool 120b that rotates accordingly are opposite to each other. As a result, the user may be confused about the operation direction, and there is a problem that the joint action is not intuitive, which may cause errors. In addition, see Figure 1d , when performing the yaw action, the formation is as follows: when the end tool 120b is formed at a position forward of the end tool rotation center 121b, and the operating part 110b is formed at a position backward of the operating part rotation center 111b, when the operating part 110b is rotated in the clockwise direction, the end tool 120b rotates in the counterclockwise direction, and when the operating part 110b is rotated in the counterclockwise direction, the end tool 120b rotates in the clockwise direction. In this case, from the perspective of the rotation direction of the operating part and the end tool, the rotation direction of the user rotating the operating part 110b and the rotation direction of the end tool 120b rotating accordingly are opposite to each other. As a result, the user may be confused about the operation direction, and there is a problem that the joint action is not intuitive and causes errors. Therefore, when the user operates the existing surgical instrument to perform pitch or yaw operations, the user's operation direction and the action direction of the end tool are inconsistent with each other in terms of one angle in the rotation direction or the left and right direction. This is because in terms of the joint configuration of the existing surgical instrument, the configuration of the end tool and the configuration of the operating part are different from each other. That is, this is because the end tool is formed at a position forward of the end tool rotation center, and the operating part is formed at a position backward of the operating part rotation center. Figure 1e and Figure 1f A feature of the surgical instrument according to an embodiment of the present invention is that the end tool 120c is formed at a position forward of the end tool rotation center 121c, and the operating portion 110c is also formed at a position forward of the operating portion rotation center 111c, so that the operations of the operating portion 110c and the end tool 120c are intuitively consistent. This feature can be expressed in different ways as follows: Figure 1a , Figure 1b , Figure 1c and Figure 1d Unlike the conventional example shown, the configuration in which the operating portion is closer to the user (ie, farther from the end tool) relative to its own joint is different. Figure 1e and Figure 1fThe surgical instrument according to an embodiment of the present invention shown in FIG. 1 is formed such that at any one or more moments during the operation, at least a portion of the operating portion is closer to the end tool based on its own joint (than its own joint).

[0126] In other words, Figure 1a , Figure 1b , Figure 1c and Figure 1d In the conventional surgical instrument shown, since the end tool is formed at a position forward of its own rotation center, and the operating part is formed at a position backward of its own rotation center, the end tool in the fixed state at the back and the moving state at the front is moved by the operation of the operating part in the fixed state at the front and the moving state at the back, so from the structural point of view, it is a structure that is not intuitively consistent. As a result, the following problem may occur: the operation of the operating part and the movement of the end tool are inconsistent in the left-right direction or the rotation direction, which may cause confusion to the user, and it is impossible to operate the operating part intuitively and quickly, causing errors. On the contrary, in the surgical instrument according to an embodiment of the present invention, the end tool and the operating part are both moved based on the rotation center formed at the backward position, so it can be considered that the movements are intuitively consistent with each other from the structural point of view. In other words, just as the moving part of the end tool moves based on the rotation center formed at the backward position, the moving part of the operating part also moves based on the corresponding rotation center formed at the backward position, so it can be considered that the movements are intuitively consistent with each other from the structural point of view. As a result, the user can intuitively and quickly control the direction of the end tool, which has the advantage of greatly reducing the possibility of causing errors. Hereinafter, a detailed mechanism for implementing the above functions will be described.

[0127] <Electrocautery surgical instruments>

[0128] Figure 2 is a perspective view showing an instrument for electrocautery surgery according to a first embodiment of the present invention. Figure 3 yes Figure 2 Side view of an instrument used for electrocautery surgery. Figure 4 and Figure 5 It is shown Figure 2 A perspective view of a distal end tool of an instrument for electrocautery surgery.

[0129] Figure 6 It is shown Figure 4 An enlarged perspective view of the center of the distal tool of an electrocautery surgical instrument. Figure 7 It is shown Figure 6 An enlarged perspective view of another embodiment of an end tool center. Figure 8 It is shown Figure 7 A front view of the guide member. Fig. 9 and Fig.10 It is shown Figure 2 A plan view of the end tool of an instrument for electrocautery surgery. Fig.11 and Fig.12 It is shown Figure 2 A perspective view of an operating portion of an instrument for electrocautery surgery. Fig.13 The structure is only schematically shown. Figure 2 A diagram showing the configuration of pulleys and guide wires of a joint of an instrument for electrocautery surgery is shown. Figures 14 to 16 is only shown schematically Figure 2 FIG. 2 is a diagram showing a wire connection arrangement in a connection portion of an electrocautery surgical instrument.

[0130] First, see Figure 2 and Figure 3 The electrocautery surgical instrument 10 according to the first embodiment of the present invention includes an end tool 100 , an operating portion 200 , a power transmission portion 300 , and a connection portion 400 .

[0131] Here, the connection part 400 is formed in a hollow shaft shape, in which one or more wires and electric wires can be accommodated. The operation part 200 is coupled to one end of the connection part 400, and the end tool 100 is coupled to the other end of the connection part 400, so that the connection part 400 can be used to connect the operation part 200 and the end tool 100. Here, one feature of the connection part 400 of the electrocautery surgical instrument 10 according to the first embodiment of the present invention is that it has a straight portion 401 and a curved portion 402, and the straight portion 401 is formed on the side coupled to the end tool 100, and the curved portion 402 is formed on the side coupled to the operation part 200. As described above, the end of the operation part 200 side of the connection part 400 is bent, so that the pitch operation part 201, the yaw operation part 202 and the actuation operation part 203 are formed on the extension line of the end tool 100 or adjacent to the extension line. Describing this from another perspective, it can be described that at least a portion of the pitch operator 201 and the yaw operator 202 are accommodated in a recess formed by the curved portion 402. The shapes and actions of the operator 200 and the end tool 100 can be more intuitively consistent with the shape of the curved portion 402 as described above.

[0132] On the one hand, the plane forming the curved portion 402 may be parallel to the pitch plane, i.e. Figure 2 As described above, since the bending portion 402 is formed on a plane substantially the same as the XZ plane, interference between the operating parts can be reduced. Of course, in order to intuitively operate the end tool and the operating part, other forms of configuration other than the XZ plane can also be adopted.

[0133] On the one hand, the connector 410 may be formed on the curved portion 402. The connector 410 may be connected to an external power source (not shown), and the connector 410 is connected to the jaw 103 through electric wires 411 and 412, so that the electric energy provided by the external power source (not shown) may be transmitted to the jaw 103. Here, the drawings show a monopolar type in which one electrode is formed on the connector 410, but the spirit of the present invention is not limited thereto, and a bipolar electrode may be formed on the connector.

[0134] The operation part 200 is formed at one end of the connection part 400 and has an interface that the doctor can directly operate, such as a clamp-shaped, rod-shaped, lever-shaped interface. When the doctor controls it, it will be connected to the corresponding interface, and the end tool 100 inserted into the surgical patient's body will perform a predetermined operation to perform surgery. Figure 2 The operation part 200 is shown to be formed in a handle shape that can be rotated by inserting a finger, but the spirit of the present invention is not limited thereto, and it can be an operation part in various forms as long as it can be connected to the end tool 100 to control the end tool 100.

[0135] The end tool 100 is formed at the other end of the connection part 400 and is inserted into the surgical site to perform the required operation. As an example of the end tool 100 as described above, Figure 2 The end tool 100 is a pair of jaws 103 shown in the figure for gripping. However, the spirit of the present invention is not limited thereto, and various surgical devices may also be used as the end tool 100. For example, a configuration such as a single-arm cauterizer may also be used as the end tool. The end tool 100 as described above is connected to the operating part 200 through the power transmission part 300, and receives the driving force of the operating part 200 through the power transmission part 300, thereby performing the actions required for the operation, such as gripping, cutting, and suturing actions.

[0136] Here, the end tool 100 of the electrocautery surgical instrument 10 according to the first embodiment of the present invention is formed to be rotatable in one or more directions. For example, the end tool 100 can be formed to surround Figure 2 While the Y axis is pitching, Figure 2 The Z-axis performs yaw motion and actuation motion.

[0137] Here, pitch, yaw, and actuation actions used in the present invention are defined as follows.

[0138] First, the pitch motion refers to the extension direction ( Figure 2 The X-axis direction in the vertical direction) is the movement of rotation around Figure 2 In other words, the pitch motion refers to the rotational motion of the end tool 100 relative to the connection part 400 around the Y axis in the up-down direction, wherein the end tool 100 is moved from the connection part 400 to the extension direction of the connection part 400 ( Figure 2 The X-axis direction) is extended to form.

[0139] Next, the yaw motion refers to the movement of the end tool 100 relative to the extension direction of the connecting portion 400 ( Figure 2 The X-axis direction in the left and right directions (the X-axis direction in the right and left directions) is the rotation around Figure 2 In other words, the yaw motion refers to the rotational motion of the end tool 100 relative to the connection part 400 in the left-right direction around the Z-axis, wherein the end tool 100 is moved from the connection part 400 to the extension direction of the connection part 400 ( Figure 2 That is, the yaw motion refers to the motion of the two jaws 103 formed on the end tool 100 rotating in the same direction around the Z axis.

[0140] On the other hand, the actuation action refers to the action of contracting or opening the jaws while the end tool 100 rotates around the same rotation axis as the yaw action, but the two jaws 103 rotate in opposite directions to each other. That is, the actuation action refers to the movement of the two jaws 103 formed on the end tool 100 rotating around the Z axis in opposite directions to each other.

[0141] The power transmission unit 300 connects the operation unit 200 and the end tool 100 , thereby transmitting the driving force of the operation unit 200 to the end tool 100 , and may include a plurality of wires, pulleys, connectors, joints, gears, and the like.

[0142] Here, a monopolar dissector is shown in the accompanying drawings as an example of an instrument for electrocautery surgery, but the spirit of the present invention is not limited to this and can be applied to various monopolar electrocautery surgical instruments, such as monopolar scissors, monopolar hooks, monopolar spatulas, etc.

[0143] Furthermore, the present invention may also be applied to various bipolar electrocautery surgical instruments such as bipolar dissectors and bipolar forceps.

[0144] The monopolar hook will be Fig.18 and Fig.19 Described in more detail in .

[0145] The above-mentioned will be described in detail later. Figure 2 The electrocautery surgical instrument 10 includes a distal end tool 100, an operating part 200, a power transmission part 300, and the like.

[0146] (Intuitive Drive)

[0147] Hereinafter, intuitive driving of the electrocautery surgical instrument 10 of the present invention will be described.

[0148] First, the user rotates the first handle 204 around the Y axis (i.e., the rotation axis 246) to perform a pitch action, and rotates the first handle 204 around the Z axis (i.e., the rotation axis 243) to perform a yaw action while gripping the first handle 204 with the palm of the hand. In addition, the user can operate the actuation operation part 203 to perform an actuation action while inserting the thumb and index finger into the first actuation extension part 252 and / or the second actuation extension part 257 in a finger ring shape formed at one end of the actuation operation part 203.

[0149] Here, one feature of the electrocautery surgical instrument 10 according to the first embodiment of the present invention is that when the operating portion 200 is rotated in any direction relative to the connecting portion 400, the end tool 100 rotates in the direction that is intuitively the same as the operating direction of the operating portion 200. In other words, when the first handle 204 of the operating portion 200 is rotated in any direction, the end tool 100 also rotates in the direction that is intuitively the same as the one direction to perform a pitch or yaw motion. Here, it can be further explained that the intuitively same direction means that the moving direction of the user's finger grasping the operating portion 200 and the moving direction of the end portion of the end tool 100 are substantially the same direction. Of course, the same direction here is not necessarily a completely consistent direction in three-dimensional coordinates, but can be understood as the following degree of identity: for example, if the user's finger moves to the left, the end portion of the end tool 100 also moves to the left, and when the user's finger moves downward, the end portion of the end tool 100 also moves downward.

[0150] In addition, for this purpose, one feature of the electrocautery surgical instrument 10 according to the first embodiment of the present invention is that the operating portion 200 and the end tool 100 are formed in the same direction based on a plane perpendicular to the extension axis (X axis) of the connecting portion 400. Figure 2 From the perspective of the YZ plane, the operating unit 200 is formed to extend in the +X axis direction, and the end tool 100 is also formed to extend in the +X axis direction. In other words, with the YZ plane as a reference, the formation direction of the end tool 100 at one end of the connection part 400 is the same as the formation direction of the operating unit 200 at the other end of the connection part 400. Or, in other words, it can be said that the operating unit 200 is formed in a direction away from the body of the user who grasps it, that is, it is formed along the direction in which the end tool 100 is formed. That is, in the first handle 204, the first actuation operating unit 251, and the second actuation operating unit 256, etc., which the user grasps and moves to perform actuation, yaw, and pitch movements, the portion that moves for each action is formed to extend in the +X axis direction relative to the rotation center of each joint used to perform the corresponding action. Thus, the moving part of the end tool 100 is extended along the +X axis direction relative to the rotation center of each joint used to perform the corresponding action, and the configuration of the operating part 200 can be the same, and as described in Figure 1, the user's operation direction and the action direction of the end tool are consistent whether from the rotation direction or from the left and right direction, so as a result, intuitively consistent operations can be performed.

[0151] In detail, existing surgical instruments have the following problems: since the direction in which the user operates the operating part and the actual moving direction of the end tool are different from each other and intuitively inconsistent, it is not easy to perform intuitive operations from the perspective of the surgeon, and it takes a long time to skillfully operate to move the end tool in the desired direction, and in some cases, incorrect operations may occur and cause harm to the patient.

[0152] In order to solve the above-mentioned problem, a feature of the electrocautery surgical instrument 10 according to the first embodiment of the present invention is that the operating direction of the operating part 200 and the running direction of the end tool 100 are intuitively the same direction. To this end, the operating part 200, like the end tool 100, is used to perform actuation, deflection, and pitch movements, and the part that actually moves extends along the +X axis direction relative to the rotation center of the corresponding joint used to perform each movement.

[0153] This will be described in more detail later Figure 2 The electrocautery surgical instrument 10 includes a distal end tool 100, an operating part 200, a power transmission part 300, and the like.

[0154] (Power Transmission Department)

[0155] In the following, it will be described in more detail Figure 2 The power transmission part 300 of the electrocautery surgical instrument 10.

[0156] See also Figures 2 to 13 The power transmission part 300 of the electrocautery surgical instrument 10 according to an embodiment of the present invention may include a wire 301 , a wire 302 , a wire 303 , a wire 304 , a wire 305 , and a wire 306 .

[0157] Here, the wire 301 and the wire 305 can be used as a first jaw wire in pair. The wire 302 and the wire 306 can be used as a second jaw wire in pair. Here, the component including the wire 301 and the wire 305 as the first jaw wire, and the wire 302 and the wire 306 as the second jaw wire can be referred to as a jaw wire. In addition, the wire 303 and the wire 304 can be used as a pitch wire in pair.

[0158] In addition, the power transmission part 300 of the electrocautery surgical instrument 10 according to an embodiment of the present invention may include a fastener coupled to each end of each wire to couple the wire and the pulley (see Figure 7 321), fastener 323, fastener 324, fastener 326, fastener 327. Here, each fastener can have various shapes as required, for example, a ball or a tube.

[0159] Here, fasteners 321 and 322 are used as pitch wire-end tool fasteners, fastener 323 is used as a first jaw wire-end tool fastener, and fastener 326 is used as a second jaw wire-end tool fastener.

[0160] In addition, on the side of the operation part 200, the fastener 324 is used as the first jaw wire-operation part fastener, and the fastener 327 can be used as the second jaw wire-operation part fastener. In addition, although not shown in the drawings, a pitch wire-operation part fastener and a staple wire-operation part fastener can be further formed on the side of the operation part 200.

[0161] Next, the coupling relationship between each wire, each fastener, and each pulley will be described in detail.

[0162] First, the wire 301 and the wire 305 as the first jaw wire can be a single wire. After the fastener 323 as the first jaw wire-end tool fastener is inserted into the middle position of the first jaw wire as a single wire and the fastener 323 is fixed by crimping, the two branches of the first jaw wire can be respectively called the wire 301 and the wire 305 with the fastener 323 as the center.

[0163] Alternatively, the wire 301 and the wire 305 as the first jaw wire may be formed as separate wires, respectively, and the wire 301 and the wire 305 may be connected by a fastener 323 .

[0164] In addition, since the fastener 323 is coupled to the pulley 111, the wire 301 and the wire 305 can be fixedly coupled to the pulley 111. Thus, the pulley 111 can rotate as the wire 301 and the wire 305 are pulled and released.

[0165] On the one hand, the first jaw wire-operating part fastener 324 may be combined with the end of the wire 301 and the wire 305 opposite to the position where the fastener 323 is fastened.

[0166] In addition, as described above, since the first jaw wire-operating part fastener 324 is coupled to the pulley 210, the wire 301 and the wire 305 can be fixedly coupled to the pulley 210. As a result, when the pulley 210 is rotated by a motor or manpower, the wire 301 and the wire 305 are pulled and released, so that the pulley 111 of the end tool 100 can be rotated.

[0167] Similarly, the wire 302 and the wire 306 as the second jaw wire are respectively connected to the fastener 326 as the second jaw wire-end tool fastener and the second jaw wire-operating part fastener 327. In addition, the fastener 326 is connected to the pulley 121, and the second jaw wire-operating part fastener 327 is connected to the pulley 220. As a result, when the pulley 220 is rotated by a motor or manpower, the wire 302 and the wire 306 are pulled and released, so that the pulley 121 of the end tool 100 can be rotated.

[0168] Similarly, the wire 303 and the wire 304 as the pitch wire are respectively combined with the fastener 321 as the pitch wire-end tool fastener and the pitch wire-operating part fastener (not shown). In addition, the fastener 321 is combined with the pulley 131, and the pitch wire-operating part fastener (not shown) is combined with the pulley 231. As a result, when the pulley 231 is rotated by a motor or manpower, the wire 303 and the wire 304 are pulled and released, so that the pulley 131 of the end tool 100 can be rotated.

[0170] Here, one feature of the electrocautery surgical instrument 10 according to one embodiment of the present invention is that the middle portion of each guide wire, that is, the portion inserted into the straight portion 401 of the connecting portion 400, is replaced with a shrink tube and an axial tube. Figures 14 to 16 Described in more detail in .

[0171] (End Tool)

[0172] The following is described in further detail Figure 2 The end tool 100 of the electrocautery surgical instrument 10 is shown. Figure 4 and Figure 5 It is shown Figure 2 A perspective view of a distal end tool of an instrument for electrocautery surgery. Figure 6 It is shown Figure 4 An enlarged perspective view of the center of the distal tool of an electrocautery surgical instrument.

[0173] Figure 7 It is shown Figure 6 An enlarged perspective view of another embodiment of an end tool center. Figure 8 It is shown Figure 7 A front view of the guide member. Fig. 9 and Fig.10 It is shown Figure 2 A plan view of the end tool of an instrument for electrocautery surgery.

[0174] in, Figure 4 The state where the end tool center 180 and the pitch center 107 are combined is shown. Figure 5 The state where the end tool center 180 and the pitch center 107 are removed is shown. In addition, Figure 7 A diagram mainly showing wires, Figure 8 This is a diagram mainly showing the pulley.

[0175] Reference Figures 4 to 10 The end tool 100 of the first embodiment of the present invention is equipped with a pair of jaws for performing a gripping action, namely a first jaw 101 and a second jaw 102. Each of the first jaw 101 and the second jaw 102, or a component including the first jaw 101 and the second jaw 102, may be referred to as a jaw 103.

[0176] In addition, the end tool 100 may include pulleys 111, 113, 114, 115, and 116 associated with the rotational movement of the first jaw 101. In addition, pulleys 121, 123, 124, 125, and 126 associated with the rotational movement of the second jaw 102 may be included.

[0177] In the drawings, the pulleys facing each other are formed in parallel, but the concept of the present invention is not limited thereto, and each pulley can be formed in a different position and size suitable for the configuration of the end tool.

[0178] Furthermore, the end tool 100 according to the first embodiment of the present invention may include an end tool center 180 and a pitch center 107 .

[0179] The rotating shaft 141 to be described later is inserted through the end tool center 180, and the interior of the end tool center 180 can accommodate the pulley 111 and the pulley 121 coupled to the rotating shaft 141, and at least a part of the first jaw 101 and the second jaw 102 coupled thereto. Among them, one embodiment of the present invention is characterized in that a guide portion 183 used as an auxiliary pulley is formed on the end tool center 180. That is, the guide portion 183 can be formed on the end tool center 180, and the guide portion 183 guides the path of the wire 305 and the wire 302. The guide portion 183 of the end tool center 180 as described above changes the path of the wire by serving as a kind of auxiliary pulley, and the guide portion 183 of the end tool center 180 used as an auxiliary pulley will be described in detail later.

[0180] On the other hand, one end of the end tool center 180 may form a pulley 131, and the pulley 131 performs the function of an end tool pitch pulley. Figure 4 As shown, the pulley 131 may be formed as one-body with the end tool center 180. Alternatively, the pulley 131 may be formed as a member independent of the end tool center 180, thereby being combined with the end tool center 180. In addition, the wire 303 and the wire 304 are combined to the pulley 131 that performs the function of the end tool pitch pulley, and the pulley 131 rotates around the rotation axis 143, thereby performing a pitching action.

[0181] The rotation shaft 143 and the rotation shaft 144 penetrate the pitch center 107, and the pitch center 107 can be connected to the end tool center 180 and the pulley 131 through the rotation shaft 143. Therefore, the end tool center 180 and the pulley 131 can be formed to be rotatable relative to the pitch center 107 around the rotation shaft 143.

[0182] In addition, the pitch center 107 may internally accommodate at least a portion of the pulleys 113, 114, 123, and 124 axially coupled to the rotation axis 143. In addition, the pitch center 107 may internally accommodate at least a portion of the pulleys 115, 116, 125, and 126 axially coupled to the rotation axis 144.

[0183] In addition, the end tool 100 of the first embodiment of the present invention may include a rotation axis 141, a rotation axis 143, and a rotation axis 144. As described above, the rotation axis 141 may be inserted through the end tool center 180, and the rotation axes 143 and 144 may be inserted through the pitch center 107.

[0184] The rotation axis 141, the rotation axis 143, and the rotation axis 144 can be sequentially arranged from the distal end 104 to the proximal end 105 of the end tool 100. Thus, the rotation axis 141 can be sequentially referred to as the first pin, the rotation axis 143 as the third pin, and the rotation axis 144 as the fourth pin starting from the distal end 104.

[0185] The rotation axis 141 functions as an end tool jaw pulley rotation axis, the rotation axis 143 functions as an end tool pitch rotation axis, and the rotation axis 144 functions as an end tool pitch auxiliary rotation axis of the end tool 100 .

[0186] One or more pulleys may be inserted into each of the rotating shafts 141 , 143 , 144 , which will be described in further detail later.

[0187] The pulley 111 functions as the first jaw pulley of the end tool, and the pulley 121 functions as the second jaw pulley of the end tool. The pulley 111 may also be referred to as the first jaw pulley, and the pulley 121 may be referred to as the second jaw pulley, and the two components may also be collectively referred to as the end tool jaw pulley.

[0188] The pulley 111 and the pulley 121 as the end tool jaw pulleys are formed to be opposite to each other and are formed to be able to rotate independently of each other around the rotation axis 141 as the rotation axis of the end tool jaw pulley. Among them, the pulley 111 and the pulley 121 in the drawings are formed to rotate around one rotation axis 141, but it is a matter of course that each jaw pulley can be formed to rotate around another axis. Among them, the first jaw 101 can rotate together with the pulley 111 by being fixedly coupled to the pulley 111, and the second jaw 102 can rotate together with the pulley 121 by being fixedly coupled to the pulley 121. The deflection action and the actuation action of the end tool 100 are performed as the pulley 111 and the pulley 121 rotate. That is, when the pulley 111 and the pulley 121 rotate in the same direction with the rotation axis 141 as the center, the yaw action is performed, and when the pulley 111 and the pulley 121 rotate in opposite directions with the rotation axis 141 as the center, the actuation action is performed.

[0189] The first jaw 101 and the pulley 111 may be formed as separate components and combined with each other, or the first jaw 101 and the pulley 111 may be formed as one body. Similarly, the second jaw 102 and the pulley 121 may be formed as separate components and combined with each other, or the second jaw 102 and the pulley 121 may be formed as one body.

[0190] The guide portion 183 of the end tool center 180 is formed on one side of the pulley 111 and the pulley 121 as the end tool jaw pulleys, thereby serving as an end tool jaw auxiliary pulley. Specifically, the guide portion 183 of the end tool center 180 can be located on one side of the pulley 111 and the pulley 121, and the guide portion 183 of the end tool center 180 as described above will be described in detail later.

[0191] Pulley 113 and pulley 114 function as main pulleys for pitching the first jaw of the end tool, and pulley 123 and pulley 124 function as main pulleys for pitching the second jaw of the end tool. The above two components can also be collectively referred to as main pulleys for pitching the jaws of the end tool.

[0192] Pulley 115 and pulley 116 function as the end tool first jaw pitch sub-pulley, pulley 125 and pulley 126 function as the end tool second jaw pitch sub-pulley, and the above two components can also be collectively referred to as the end tool jaw pitch sub-pulley.

[0193] Hereinafter, constituent elements related to the rotation of the pulley 111 are described.

[0194] The pulley 113 and the pulley 114 function as the main pulleys for the pitching of the first jaw of the end tool, that is, they function as the main rotating pulleys for the pitching action of the first jaw 101. The wire 301 as the first jaw wire is wound around the pulley 113, and the wire 305 as the first jaw wire is wound around the pulley 114.

[0195] The pulley 115 and the pulley 116 function as the auxiliary pulleys for the pitching of the first jaw of the end tool, that is, they function as auxiliary rotation pulleys for the pitching action of the first jaw 101. The wire 301 as the first jaw wire is wound around the pulley 115, and the wire 305 as the first jaw wire is wound around the pulley 116.

[0196] In one side of the pulley 111, the pulley 113 and the pulley 114 are arranged to be opposite to each other. In one side of the pulley 111, the pulley 113 and the pulley 114 are formed to be able to rotate independently of each other with the rotation axis 143 as the end tool pitch rotation axis as the center. In addition, in one side of each of the pulleys 113 and 114, the pulley 115 and the pulley 116 are arranged to be able to rotate independently of each other with the rotation axis 144 as the end tool pitch auxiliary rotation axis as the center. In the drawings, the pulleys 113, 115, 114 and 116 are all formed to be able to rotate with the Y-axis direction as the center, but the concept of the present invention is not limited thereto, and the rotation axis of each pulley can be formed in various directions to suit its configuration.

[0197] The wire 301 as the first jaw wire is wound around the pulley 115, the pulley 113 and the pulley 111 in sequence so as to contact at least a portion thereof. In addition, the wire 305 connected to the wire 301 by the fastener 323 is wound around the pulley 111, the guide 183, the pulley 114 and the pulley 116 in sequence so as to contact at least a portion thereof.

[0198] Explained from another perspective, the wire 301 and the wire 305 serving as the first jaw wire are sequentially wound around the pulley 115, the pulley 113, the pulley 111, the guide portion 183, the pulley 114, and the pulley 116 so as to contact at least a portion thereof, and the wire 301 and the wire 305 are formed to be able to move with the pulley while rotating the pulley.

[0199] Therefore, when Fig. 9 When the wire 301 is pulled from the arrow 301 side, the fastener 323 combined with the wire 301 and the pulley 111 combined with it move toward Fig. 9 On the contrary, when the Fig. 9 When the wire 305 is pulled from the arrow 305 side, the fastener 323 combined with the wire 305 and the pulley 111 combined with it move toward Fig. 9 Rotate in the direction of arrow R.

[0200] Hereinafter, constituent elements related to the rotation of the pulley 121 are described.

[0201] The pulley 123 and the pulley 124 function as the main pulleys for the pitching of the second jaw of the end tool, that is, they function as the main rotating pulleys for the pitching action of the second jaw 102. The wire 306 as the second jaw wire is wound around the pulley 123, and the wire 302 as the second jaw wire is wound around the pulley 124.

[0202] The pulley 125 and the pulley 126 function as the auxiliary pulleys of the second jaw of the end tool, that is, they function as auxiliary rotation pulleys for the pitching motion of the second jaw 102. The wire 306 as the second jaw wire is wound around the pulley 125, and the wire 302 as the second jaw wire is wound around the pulley 126.

[0203] On one side of the pulley 121, the pulley 123 and the pulley 124 are arranged to be opposite to each other. The pulley 123 and the pulley 124 are formed to be able to rotate independently of each other with the rotation axis 143 as the end tool pitch rotation axis as the center. In addition, on one side of each of the pulleys 123 and 124, the pulley 125 and the pulley 126 are arranged to be opposite to each other. The pulley 125 and the J15 pulley 123J25 are formed to be able to rotate independently of each other with the rotation axis 144 as the end tool pitch auxiliary rotation axis as the center. In the drawings, the pulleys 123, 125, 124 and 126 are all formed to be able to rotate with the Y-axis direction as the center, but the concept of the present invention is not limited thereto, and the rotation axis of each pulley can be formed in various directions to suit its configuration.

[0204] The wire 306 as the second jaw wire is wound around the pulley 125, the pulley 123, and the pulley 121 in sequence so as to be in contact with at least a portion thereof. In addition, the wire 302 connected to the wire 306 by the fastener 326 is wound around the pulley 121, the guide 183, the pulley 124, and the pulley 126 in sequence so as to be in contact with at least a portion thereof.

[0205] Explained from another perspective, wire 306 and wire 302, which serve as the second jaw wire, are wound around pulley 125, pulley 123, pulley 121, guide 183, pulley 124, and pulley 126 in sequence so as to contact at least a portion thereof, and wire 306 and wire 302 are formed to be able to move with the pulley while rotating the pulley.

[0206] Therefore, when Fig. 9 When the wire 306 is pulled from the arrow 306 side, the fastener 322 combined with the wire 306 and the pulley 121 combined with the fastener 322 are moved toward Fig. 9 On the contrary, when the Fig. 9 When the wire 302 is pulled from the arrow 302 side, the fastener 326 combined with the wire 302 and the pulley 121 combined with it move toward Fig. 9 Rotate in the direction of arrow L.

[0207] Hereinafter, the end tool center 180 according to an embodiment of the present invention will be described in further detail, and in particular, the guide portion 183 of the end tool center 180 used as an auxiliary pulley will be described in detail.

[0208] The end tool hub 180 includes a pair of jaw pulley coupling portions 181 , 182 , a guide portion 183 , a guide groove 184 , and a pitch pulley portion 185 .

[0209] Specifically, a pair of jaw pulley joints 181 and 182 are formed opposite to each other so that the pulleys 111 and 121 are accommodated therein. In addition, through holes are formed in each of the jaw pulley joints 181 and 182, and the rotary shaft 141 is axially coupled by passing through the jaw pulley joints 181 and 182 and the pulleys 111 and 121.

[0210] The pair of jaw pulley joints 181 and 182 are connected by a guiding portion 183. That is, the pair of jaw pulley joints 181 and 182 that are balanced with each other are joined by the guiding portion 183 formed in a substantially perpendicular direction thereto. Thus, the pair of jaw pulley joints 181 and 182 and the guiding portion 183 are substantially in a "C" shape, and the pulleys 111 and 121 are accommodated therein.

[0211] Explained from another perspective, it can also be regarded that the pair of jaw pulley joints 181 and 182 are formed by extending from the two end portions of the guiding portion 183 in the X-axis direction, and the guiding portion 183 is formed to be longer in the Z-axis direction.

[0212] Among them, the guiding portion 183 can be formed in a cylindrical shape with a substantially semi-circular cross section. In addition, the above-mentioned semi-circular portion can be set to protrude toward the pulleys 111 and 121. Explained from another perspective, it can also be expressed that the guiding portion 183 protrudes into the space formed by the pair of jaw pulley joints 181 and 182 and the guiding portion 183. Explained from another perspective, it can also be expressed that the region of the guiding portion 183 adjacent to the jaw pulley joints 181 and 182 is bent to have a predetermined curvature in its cross section.

[0213] Or, explained from another perspective, the guiding portion 183 performs the function of a kind of pulley element by winding the wire 305 and the wire 302 around its outer peripheral surface, that is, guiding the paths of the wire 305 and the wire 302. However, here the guiding portion 183 is not an element that rotates around a predetermined axis like a pulley in the original sense, but is fixedly formed as a part of the end effector center 180, and due to the wire wound around its periphery, it similarly performs part of the function of a pulley guiding the wire path.

[0214] Among them, the drawings show that the guiding portion 183 is formed in a cylindrical shape with a substantially semi-circular cross section. That is, at least a part of the cross section of the guiding portion 183 in the XY plane is in a predetermined arc shape. However, the concept of the present invention is not limited thereto, and the cross section can be formed in various shapes and sizes suitable for guiding the paths of the wire 305 and the wire 302. For example, it is formed to have a predetermined curvature (such as an ellipse or a parabola, etc.), or the corners of a polygonal column are bent to a predetermined degree, etc.

[0215] The portion of the guide portion 183 that contacts the wires 305 and 302 may further form a guide groove 184 for better guiding the paths of the wires 305 and 302. The guide groove 184 may be formed in the form of a groove that is recessed to a predetermined degree from the surface protruding from the guide portion 183.

[0216] In the drawings, the guide groove 184 is formed on the entire arc surface of the guide portion 183 , but the concept of the present invention is not limited thereto, and the guide groove 184 can be formed on a partial arc surface of the guide portion 183 as needed.

[0217] As described above, by further forming the guide groove 184 in the guide portion 183 , unnecessary friction between the wires can be reduced, thereby improving the durability of the wires.

[0218] In the guide portion 183, a pitch pulley portion 185 may be further formed in a direction opposite to the direction in which the jaw pulley coupling portions 181 and 182 are formed. In addition, a pulley 131 serving as a pitch pulley may be formed on the pitch pulley portion 185, and wires 303 and 304 serving as pitch wires may be wound around the pulley 131. However, the pulley 131 is not an element that rotates around a predetermined axis as a pulley in the original sense, but is fixedly formed as a part of the end tool center 180, and performs a partial function of a pulley similarly due to the wires being wound around its periphery. The pitch pulley portion 185 may be formed on the XZ plane. In addition, a through hole may be formed in the pitch pulley portion 185, and the rotating shaft 143 may be inserted through the through hole.

[0219] On the other hand, although not shown in the drawings, the pitch pulley portion and the pitch pulley may be formed as separate members to be combined, and the rotation shaft 143 may be formed to penetrate the pitch pulley portion and the pulley.

[0220] Hereinafter, the role and function of the guide portion 183 will be described in further detail.

[0221] The guide portion 183 performs a function of expanding the rotation radius of each of the first jaw 101 and the second jaw 102 by changing the arrangement paths of the wires 305 and 302 to some extent by coming into contact with the wires 305 and 302 .

[0222] That is, when the auxiliary pulley or guide portion 183 is not provided, the pulley 111 serving as the first jaw pulley and the pulley 121 serving as the second jaw pulley can be rotated to right angles respectively, but one embodiment of the present invention can obtain the effect of expanding the maximum rotation angle of each pulley by further equipping the end tool center 180 with a guide portion 183.

[0223] This enables the two jaws of the end tool 100 to be opened for actuation when the two jaws are deflected and rotated 90 degrees. In other words, the guide portion 183 of the end tool center 180 has the feature of expanding the deflection rotation range in which actuation can be performed.

[0224] Furthermore, without adding an additional component such as an auxiliary pulley, the guide portion 183 is formed on the existing end tool center 180, thereby having a feature of expanding the rotation range without adding components and manufacturing processes.

[0225] As a result, there is no need to add additional components for expanding the rotation angle, thereby reducing the number of original parts and simplifying the manufacturing process, and the length of the end tool is reduced by the same length as the size of the auxiliary pulley, so that the length of the end tool is reduced when performing a pitch action, thereby achieving the effect of more easily performing surgical actions in a small space.

[0226] This is described in detail below.

[0227] The end tool 100 of the surgical instrument according to an embodiment of the present invention is characterized in that a guide portion 183 capable of changing the wire path is formed on the inner side wall of the end tool center 180, thereby changing the setting path of the wire without additional components. As described above, by forming the guide portion 183 on the end tool center 180, the setting path of the wire 305, the wire 302 can be changed to a certain extent, thereby changing the tangent direction of the wire 305, the wire 302, thereby expanding the rotation angle of the fastener 323, the fastener 326 that connects each wire to the pulley.

[0228] That is, the fastener 326 that connects the wire 302 and the pulley 121 can be rotated to the inner common tangent line between the pulley 121 and the guide portion 183. Similarly, the fastener that connects the wire 305 and the pulley 111 (see Fig.11 323) can be rotated to the inner common tangent line between the pulley 111 and the guide portion 183, thereby expanding the fastener (refer to Fig.11 The rotation angle of 323).

[0229] To explain this from another perspective, the wires 301 and 305 wound on the pulley 111 are arranged on one side with respect to a plane perpendicular to the Y axis and passing through the X axis through the guide portion 183. Meanwhile, the wires 302 and 306 wound on the pulley 121 are arranged on the other side with respect to a plane perpendicular to the Y axis and passing through the X axis through the guide portion 183.

[0230] In other words, the pulleys 113 and 114 are disposed on one side with respect to a plane perpendicular to the Y axis and passing through the X axis, and the pulleys 123 and 124 are disposed on the other side with respect to a plane perpendicular to the Y axis and passing through the X axis.

[0231] In other words, the wire 305 is located on the inner common tangent line of the pulley 111 and the guide 183, and the rotation angle of the pulley 111 is enlarged by the guide 183. In addition, the wire 302 is located on the inner common tangent line of the pulley 121 and the guide 183, and the rotation angle of the pulley 121 is enlarged by the guide 183.

[0232] Compared with a surgical instrument with an additional auxiliary pulley, the present embodiment does not form an auxiliary pulley and forms a guide portion 183 that can change the guide wire path on the inner side wall of the end tool center 180. The length of the end tool of the surgical instrument in the present embodiment can be reduced. As described above, the reduced length of the end tool allows the operator to easily perform surgery in a narrow surgical space in the human body and reduces the side effects of the surgery.

[0233] According to the present invention as described above, the rotation radius of the pulley 111 as the first jaw pulley and the pulley 121 as the second jaw pulley is enlarged, thereby achieving an effect of expanding the deflection action range capable of performing a normal opening and closing actuation action.

[0234] On the other hand, as described above, the guide portion 183 may be integrally formed in the end tool center 180, but may also be formed as a separate member distinguished from the end tool center 180. Figure 7 As shown, the guide member 150 may be separately formed and coupled to the interior of the end tool center 180 .

[0235] Here, the guide member 150 is formed of an elastic body such as plastic, so that the paths of the wires 305 and 302 can be guided to reduce the friction between the wires and the end tool center 180. In other words, by interposing the guide member 150 formed of plastic between the end tool center 180 and the wires to prevent the wires from directly contacting the end tool center 180 of the metal material, the effect of reducing friction with the wires and the wear of the wires can be obtained.

[0236] In addition, the guide member 150 has a through hole 155 formed therein, so that when the guide member 150 is located within the end tool center 180, a second pin (not shown) is sequentially inserted into the through holes 155 of the end tool center 180 and the guide member 150, thereby fixing the end tool center 180 and the guide member 150 together.

[0237] In addition, the guide member 150 has the same shape as the guide portion 183 as described above, and at least a portion of the cross-section of the guide member 150 on the XY plane may have a predetermined arc shape, but the spirit of the present invention is not limited thereto, and it may be formed into various shapes and sizes suitable for the paths of the guide wires 305 and 302, such as a cross-section formed into an ellipse or a parabola, etc., to have a predetermined curvature, or the edges and corners of a polygonal prism may be formed into an arc shape to a certain extent.

[0238] See also Figures 7 and 8 Guide wings 153 and 154 are further formed on the guide member 150 to contact the wires 305 and 302 to better guide the paths of the wires. The guide wings 153 and 154 may be formed in the shape of wings protruding to a certain extent from the surface of the guide member 150.

[0239] In detail, the guide wings 153 and 154 may be formed to have paths corresponding to directions traveling from points where the wires 305 and 302 respectively intersect the guide member 150 toward the end tool pitch pulleys 114 and 124 through the end tool center 180 .

[0240] Describing this from another perspective, the wires 305 and 302 may be located in contact with inner corners 153a and 154a between the guide member 150 and the guide wings 153 and 154 protruding from the surface of the guide member, and the inner corners 153a and 154a may be formed as curved surfaces.

[0241] On the other hand, as shown in the figure, the guide wing 154 is formed on one side of the guide member 150 where the wire 305 contacts the guide member 150, and the guide wing 153 may be formed on the other side where the wire 302 contacts the guide member 150.

[0242] Here, the drawings show that the guide wings 153 and 154 are formed only on one side of the guide member 150 , but the spirit of the present invention is not limited thereto, and the guide wings 153 may be formed on the entire arc-shaped surface of the guide member 150 .

[0243] On the other hand, here, the pitch wire may be a single wire. That is, after the fastener 325 is inserted into the middle point of the pitch wire as a single wire and the fastener 325 is fixed to the pitch wire by crimping, the two branches of the pitch wire can be respectively called wire 303 and wire 304 with the fastener 325 as the center. At this time, in order to prevent the fastener 325 of the pitch wire from being separated from the end tool center 180, the fastener 325 fastening the pitch wire is set to the tube receiving portion 186 of the end tool center 180, and then the guide member 150 is coupled to the end tool center 180, so that the guide member 150 can seal the tube receiving portion 186.

[0244] In addition, the guide member 150 may be formed with a groove 152 having a certain depth from a surface coupled with the end tool center 180 so as to accommodate the fastener 325 partially protruding from the tube receiving portion 186 toward the guide member 150 .

[0245] As described above, by coupling the guide member 150 formed as a separate member to the end tool center 180, friction and wear caused by contact between the wire 305 and the wire 302 and the end tool center 180 can be reduced, and the fastener 325 of the pitch wire composed of a single wire can be stably coupled to the end tool center 180.

[0246] Hereinafter, the pitching motion of the present invention will be described in detail.

[0247] On the other hand, when the wire 301 is pulled to Fig. 9 The wire 305 is pulled to the side of the arrow 301 in FIG. Fig. 9 When the arrow 305 side in FIG. 1 is pulled (i.e., both branches of the first jaw wire are pulled), as Figure 5 As shown, the wires 301 and 305 are wound downwardly of the pulleys 113 and 114 which can rotate around the rotation axis 143 as the pitch rotation axis of the end tool, so the pulley 111 to which the wires 301 and 305 are fixedly coupled and the end tool center 180 to which the pulley 111 is coupled rotates counterclockwise around the rotation axis 143 as a whole, and finally the end tool 100 rotates downwardly while performing the pitch motion. At this time, the second jaw 102 and the wires 302 and 306 fixedly coupled thereto are wound upwardly of the pulleys 123 and 124 which can rotate around the rotation axis 143 as a center, so the wires 302 and 306 are released in the opposite directions of 302 and 306, respectively.

[0248] In contrast, when the wire 302 is pulled to Fig. 9 The wire 306 is pulled to the side of the arrow 302 in FIG. Fig. 9When the arrow 306 is on the side, Figure 5 As shown, the wires 302 and 306 are wound upwards around the pulleys 123 and 124 that can rotate around the rotation axis 143 as the pitch rotation axis of the end tool, so the pulley 121 to which the wires 302 and 306 are fixedly coupled and the end tool center 180 to which the pulley 121 is coupled rotate together in the clockwise direction around the rotation axis 143 as a whole, and finally the end tool 100 is rotated upwards while performing the pitch motion. At this time, the first jaw 101 and the wires 301 and 305 fixedly coupled thereto are wound downwards around the pulleys 113 and 114 that can rotate around the rotation axis 143 as a center, so the wires 302 and 306 move in the opposite directions of 301 and 305, respectively.

[0249] On the other hand, the end tool 100 of the electrocautery surgical instrument 10 of the present invention can be further equipped with a pulley 131 as an end tool pitch pulley, the operating part 200 can be further equipped with pulleys 231 and 232 as operating part pitch pulleys, and the power transmission part 300 can be further equipped with wires 303 and 304 as pitch wires. Specifically, the pulley 131 of the end tool 100 can rotate around the rotation axis 143 as the end tool pitch rotation axis, and is formed as a whole with the end tool center 180 (or fixedly coupled to the end tool center 180). In addition, the wires 303 and 304 can perform the function of connecting the pulley 131 of the end tool 100 with the pulleys 231 and 232 of the operating part 200.

[0250] Therefore, when the pulleys 231 and 232 of the operating part 200 rotate, the rotation of the pulleys 231 and 232 is transmitted to the pulley 131 of the end tool 100 through the wires 303 and 304, so that the pulley 131 also rotates, and finally the end tool 100 rotates while performing a pitch motion.

[0251] That is, the electrocautery surgical instrument 10 according to the first embodiment of the present invention is equipped with a pulley 131 of the end tool 100, pulleys 231 and 232 of the operating part 200, and wires 303 and 304 of the power transmission part 300 to transmit the power required for the pitch movement, so that the driving force of the pitch movement of the operating part 200 is more perfectly transmitted to the end tool 100, thereby improving the movement reliability.

[0252] The diameters of the pulleys 113, 114, 123, and 124 as the end tool jaw pitch main pulleys and the diameter of the pulley 131 as the end tool pitch pulley may be the same as or different from each other. At this time, the ratio of the diameter of the end tool jaw pitch main pulley to the diameter of the end tool pitch pulley may be the same as the ratio of the diameter of the operating portion pitch pulley of the operating portion 200 to be described later to the diameter of the operating portion pitch main pulley.

[0253] (Operation Department)

[0254] Fig.11 and Fig.12 It is shown Figure 2 A perspective view of an operating portion of an instrument for electrocautery surgery.

[0255] See also Figures 2 to 12 The operating part 200 of the electrocautery surgical instrument 10 according to the first embodiment of the present invention includes a first handle 204 that can be grasped by a user, an actuation operating part 203 for controlling the actuation movement of the end tool 100, a deflection operating part 202 for controlling the deflection movement of the end tool 100, and a pitch operating part 201 for controlling the pitch movement of the end tool 100.

[0256] The operation part 200 may include pulleys 210, 211, 212, 213, 214, 215, 216, 217, and 218 associated with the rotational movement of the first jaw 101. In addition, the operation part 200 may include pulleys 220, 221, 222, 223, 224, 225, 226, 227, and 228 associated with the rotational movement of the second jaw 102. In addition, the operation part 200 may include pulleys 231, 232, 233, and 234 associated with the pitching movement. In addition, the operation part 200 may include a pulley 235, which is an intermediate pulley provided at intervals in the curved portion 402 of the connecting portion 400.

[0257] Here, although the drawings show that each pulley facing each other is formed in parallel with each other, the spirit of the present invention is not limited thereto, and each pulley may be formed at various positions suitable for the configuration of the operating portion and may also be formed in various sizes suitable for the configuration of the operating portion.

[0258] In addition, the operating part 200 of the first embodiment of the present invention may include a rotation axis 241, a rotation axis 242, a rotation axis 243, a rotation axis 244, a rotation axis 245, and a rotation axis 246. Here, the rotation axis 241 is used as the first jaw actuation rotation axis of the operating part, and the rotation axis 242 can be used as the second jaw actuation rotation axis of the operating part. In addition, the rotation axis 243 is used as the main rotation axis of the operating part deflection, and the rotation axis 244 can be used as the secondary rotation axis of the operating part deflection. In addition, the rotation axis 245 is used as the secondary rotation axis of the operating part pitch, and the rotation axis 246 can be used as the main rotation axis of the operating part pitch.

[0259] The rotation axis 241 / the rotation axis 242 , the rotation axis 243 , the rotation axis 244 , the rotation axis 245 , and the rotation axis 246 may be sequentially disposed in a direction from a distal end 205 to a proximal end 206 of the operation portion 200 .

[0260] One or more pulleys may be inserted into the rotating shafts 241 , 242 , 243 , 244 , 245 , and 246 , which will be described in detail below.

[0261] The pulley 210 is used as an operating part first jaw actuating pulley, and the pulley 220 is used as an operating part second jaw actuating pulley, and these two components may be collectively referred to as operating part actuating pulleys.

[0262] The pulleys 211 and 212 are used as main pulleys for deflecting the first jaw of the operating part, and the pulleys 221 and 222 are used as main pulleys for deflecting the second jaw of the operating part. These components can be collectively referred to as main pulleys for deflecting the operating part.

[0263] The pulleys 213 and 214 are used as the operating part first jaw deflection auxiliary pulleys, and the pulleys 223 and 224 are used as the operating part second jaw deflection auxiliary pulleys. These components can be collectively referred to as operating part deflection auxiliary pulleys.

[0264] The pulleys 215 and 216 are used as the first jaw pitching sub-pulleys of the operating part, and the pulleys 225 and 226 are used as the second jaw pitching sub-pulleys of the operating part. These components can be collectively referred to as the operating part pitching sub-pulleys.

[0265] The pulleys 217 and 218 are used as the main pulleys for pitching the first jaw of the operating part, and the pulleys 227 and 228 are used as the main pulleys for pitching the second jaw of the operating part. These components can be collectively referred to as the main pulleys for pitching the operating part.

[0266] The pulleys 231 and 232 serve as operating section pitch wire main pulleys, and the pulleys 233 and 234 serve as operating section pitch wire sub pulleys.

[0267] The above-mentioned constituent elements are classified as follows from the viewpoint of each movement (pitch / yaw / actuation) of the operating portion.

[0268] The pitch operation part 201 for controlling the pitch movement of the end tool 100 may include pulleys 215, 216, 217, 218, 225, 226, 227, 228, 231, 232, and 234. In addition, the pitch operation part 201 may include a rotation axis 245 and a rotation axis 246. In addition, the pitch operation part 201 may further include a pitch frame 208.

[0269] The deflection operation part 202 for controlling the deflection movement of the end tool 100 may include pulleys 211, 212, 213, 214, 221, 222, 223, and 224. In addition, the deflection operation part 202 may include a rotation shaft 243 and a rotation shaft 244. In addition, the deflection operation part 202 may further include a deflection frame 207.

[0270] The actuation operator 203 for controlling the actuation movement of the end tool 100 may include a pulley 210, a pulley 220, a rotation shaft 241, and a rotation shaft 242. In addition, the actuation operator 203 may further include a first actuation operator 251 and a second actuation operator 256.

[0271] Hereinafter, each constituent element of the operation portion 200 will be described in more detail.

[0272] The first handle 204 is formed to be grasped by the user, and in particular, can be formed to be grasped by the user by wrapping the palm of his hand around the first handle 204. In addition, the actuation operation part 203 and the yaw operation part 202 are formed on the first handle 204, and the pitch operation part 201 is formed on one side of the yaw operation part 202. In addition, the other end of the pitch operation part 201 is connected to the bent part 402 of the connecting part 400.

[0273] The actuation operation part 203 includes a first actuation operation part 251 and a second actuation operation part 256. The first actuation operation part 251 includes a rotation shaft 241, a pulley 210, a first actuation extension part 252, and a first actuation gear 253. The second actuation operation part 256 includes a rotation shaft 242, a pulley 220, a second actuation extension part 257, and a second actuation gear 258. Here, the ends of the first actuation extension part 252 and the second actuation extension part 257 are formed in a finger ring shape to act as a second handle.

[0274] Here, the rotation axis 241 and the rotation axis 242 as the actuation rotation axis may be formed to have a predetermined angle with the XY plane formed with the connection portion 400. For example, the rotation axis 241 and the rotation axis 242 may be formed in a direction parallel to the Z axis, in which case the coordinate system of the actuation operation portion 203 may be relatively changed when the pitch operation portion 201 or the yaw operation portion 202 rotates. Of course, the spirit of the present invention is not limited thereto, and according to ergonomic design, the rotation axis 241 and the rotation axis 242 may be formed in multiple directions to accommodate the structure of the user's hand holding the actuation operation portion 203.

[0275] On the one hand, the pulley 210, the first actuating extension 252 and the first actuating gear 253 may be fixedly coupled to each other so as to rotate together around the rotation axis 241. Here, the pulley 210 may consist of one pulley or may consist of two pulleys fixedly coupled to each other.

[0276] Similarly, the pulley 220, the second actuating extension 257 and the second actuating gear 258 may be fixedly coupled to each other so as to rotate together around the rotating shaft 242. Here, the pulley 220 may consist of one pulley, or may consist of two pulleys fixedly coupled to each other.

[0277] Here, the first actuating gear 253 and the second actuating gear 258 are formed to be meshed with each other so that when either side rotates, they can be formed to rotate together in opposite directions to each other.

[0278] The yaw operation part 202 may include a rotation shaft 243, pulleys 211 and 212 as the first jaw deflection main pulleys of the operation part, pulleys 221 and 222 as the second jaw deflection main pulleys of the operation part, and a yaw frame 207. In addition, the yaw operation part 202 may further include pulleys 213 and 214, which are the first jaw deflection auxiliary pulleys of the operation part formed on one side of the pulleys 211 and 212, and pulleys 223 and 224, which are the second jaw deflection auxiliary pulleys of the operation part formed on one side of the pulleys 221 and 222. Here, the pulleys 213 and 214 and the pulleys 223 and 224 may be coupled to the pitch frame 208 described later.

[0279] Here, although the yaw operation unit 202 is shown to include the pulleys 211 and 212 and the pulleys 221 and 222, and the pulleys 211 and 212 and the pulleys 221 and 222 each have two pulleys facing each other and independently rotatable, the spirit of the present invention is not limited thereto. That is, the yaw operation unit 202 may have one or more pulleys having the same or different diameters according to the configuration.

[0280] In detail, a rotation axis 243 serving as a main rotation axis of the operation portion 203 is formed on one side of the first handle 204. At this time, the first handle 204 is formed to be rotatable around the rotation axis 243.

[0281] Here, the rotation axis 243 may be formed to have a predetermined angle with the XY plane formed with the connection portion 400. For example, the rotation axis 243 may be formed in a direction parallel to the Z axis, and in this state, when the pitch operation portion 201 rotates, as described above, the coordinate system of the rotation axis 243 may be relatively changed. Of course, the spirit of the present invention is not limited thereto, and according to ergonomic design, the rotation axis 243 may be formed in multiple directions to adapt to the structure of the user's hand holding the operation portion 200.

[0282] On the one hand, the pulleys 211 and 212 and the pulleys 221 and 222 are coupled to the rotating shaft 243 so as to be rotatable around the rotating shaft 243. In addition, the wire 301 or the wire 305 as the first jaw wire is wound around the pulleys 211 and 212, and the wire 302 or the wire 306 as the second jaw wire is wound around the pulleys 221 and 222. At this time, the pulleys 211 and 212 and the pulleys 221 and 222 can be respectively composed of two pulleys formed to face each other and independently rotatable. Therefore, the wire wound in and the wire unwound can be respectively wound on separate pulleys, so that they can operate without interfering with each other.

[0283] The deflection frame 207 rigidly connects the first handle 204 , the rotation axis 241 , the rotation axis 242 , and the rotation axis 243 , so that the first handle 204 , the deflection operator 202 , and the actuation operator 203 deflect and rotate around the rotation axis 243 as a whole.

[0284] The pitch operation part 201 may include a rotation axis 246, a pulley 217 and a pulley 218 as a first jaw pitch main pulley of the operation part, a pulley 227 and a pulley 228 as a second jaw pitch main pulley of the operation part, and a pitch frame 208. In addition, the pitch operation part 201 may further include a rotation axis 245, pulleys 215 and 216, and pulleys 225 and 226, wherein the pulleys 215 and 216 are formed on one side of the pulleys 217 and 218 as a first jaw pitch secondary pulley of the operation part, and the pulleys 225 and 226 are formed on one side of the pulleys 227 and 228 as a second jaw pitch secondary pulley of the operation part. The pitch operation part 201 may be connected to the curved portion 402 of the connecting portion 400 via the rotation axis 246.

[0285] Specifically, the pitch frame 208 is a base frame of the pitch operation unit 201 , and the rotation axis 243 is rotatably coupled to one end thereof. That is, the yaw frame 207 is formed to be rotatable about the rotation axis 243 relative to the pitch frame 208 .

[0286] As described above, since the yaw frame 207 is connected to the first handle 204, the rotation axis 243, the rotation axis 241, and the rotation axis 242, and the yaw frame 207 is axially coupled to the pitch frame 208, when the pitch frame 208 pitches and rotates around the rotation axis 246, the yaw frame 207, the first handle 204, the rotation axis 241, the rotation axis 242, and the rotation axis 243 connected to the pitch frame 208 pitch and rotate together. That is, when the pitch operation unit 201 rotates around the rotation axis 246, the actuation operation unit 203 and the yaw operation unit 202 rotate together with the pitch operation unit 201. In other words, when the user causes the first handle 204 to pitch and rotate around the rotation axis 246, the actuation operation unit 203, the yaw operation unit 202, and the pitch operation unit 201 move together.

[0287] The pulleys 217 and 218 and the pulleys 227 and 228 are coupled to the rotation axis 246 to be rotatable around the rotation axis 246 of the pitch frame 208 .

[0288] Here, the pulley 217 and the pulley 218 may be formed to face each other so as to be independently rotatable. Therefore, the wire wound in and the wire unwound may be wound on separate pulleys respectively, so as to be able to operate without interfering with each other. Similarly, the pulley 227 and the pulley 228 may be formed to face each other so as to be independently rotatable. Therefore, the wire wound in and the wire unwound may be wound on separate pulleys respectively, so as to be able to operate without interfering with each other.

[0289] Next, the wires 303 and 304 serving as the elevation wires operate as follows.

[0290] In the end tool 100, the pulley 131 as the end tool pitch pulley is formed to be fixedly coupled to the end tool center 180, and in the operating part 200, the pulleys 231 and 232 as the operating part pitch pulleys are formed to be fixedly coupled to the pitch frame 208. In addition, these pulleys are connected to each other by the wires 303 and 304 as the pitch wires, so that the pitching action of the end tool 100 can be more easily performed according to the pitching operation of the operating part 200. Here, the wire 303 is fixedly coupled to the pitch frame 208 through the pulleys 231 and 233, and the wire 304 is fixedly coupled to the pitch frame 208 through the pulleys 232 and 234. That is, the pitch frame 208, the pulley 231 and the pulley 232 rotate together around the rotation axis 246 through the pitch rotation of the operating part 200, and as a result, the wires 303 and 304 also move, thereby distinguishing the pitch action of the end tool performed by the wires 301, 302, 305 and 306 serving as the jaw wires, and the power of the pitch rotation can be additionally transmitted.

[0291] The connection relationship between the first handle 204 and the pitch operation unit 201, the yaw operation unit 202 and the actuation operation unit 203 is sorted out as follows. The first handle 204 may be formed with a rotation axis 241, a rotation axis 242, a rotation axis 243, a rotation axis 244, a rotation axis 245 and a rotation axis 246. At this time, since the rotation axis 241 and the rotation axis 242 are directly formed on the first handle 204, the first handle 204 and the actuation operation unit 203 can be directly connected. On the one hand, since the rotation axis 243 is directly formed on the first handle 204, the first handle 204 and the yaw operation unit 202 can be directly connected. On the contrary, since the pitch operation unit 201 is formed to be connected to the yaw operation unit 202 on one side of the yaw operation unit 202, the pitch operation unit 201 is not directly connected to the first handle 204, but can be formed to be indirectly connected to the first handle 204 through the yaw operation unit 202.

[0292] Continuing to refer to the drawings, in the electrocautery surgical instrument 10 according to the first embodiment of the present invention, the pitch operation part 201 and the end tool 100 can be formed on the same or parallel axis (X axis). That is, the rotation axis 246 of the pitch operation part 201 is formed at one end of the curved part 402 of the connecting part 400, and the end tool 100 is formed at the other end of the connecting part 400.

[0293] In addition, one or more intermediate pulleys 235 for changing or guiding the path of each wire may be provided at every interval of the connection portion 400, especially at the curved portion 402. At least a portion of each wire is wound around each intermediate pulley 235 to guide the path of each wire, so that the wire can be arranged along the curved shape of the curved portion 402.

[0294] Here, although the connecting portion 400 is shown in the drawings as having a curved portion 402 and being curved to have a predetermined curvature, the spirit of the present invention is not limited thereto, and the connecting portion 400 may be formed as a straight line or curved once or multiple times as required, and even in this case, it can be considered that the pitch operating portion 201 and the end tool 100 are formed on substantially the same or parallel axes. Figure 3 The pitch operation unit 201 and the end tool 100 are shown to be formed on axes parallel to the X-axis, but the spirit of the present invention is not limited thereto, and the pitch operation unit 201 and the end tool 100 may be formed on axes different from each other.

[0295] The staple operation part 260 is connected to the staple pulley 161 of the end tool 100 via the guide wires 307 and 308 as staple guide wires, and can be used to rotate the staple pulley 161 alternately in the clockwise direction or the counterclockwise direction.

[0296] To this end, although not shown in the drawings, the staple operating part 260 may include a motor (not shown). That is, while the user presses the staple operating part 260 formed in the form of a button, the motor (not shown) is driven to alternately rotate the staple pulley in a clockwise direction or a counterclockwise direction (see Fig.47 269). In addition, thereby, the staple pulley 161 of the end tool 100 can rotate alternately in the clockwise direction or the counterclockwise direction.

[0297] (actuation action, yaw action, pitch action)

[0298] The description of the actuation action, yaw action and pitch action in this embodiment is as follows.

[0299] First, the actuation action is as follows.

[0300] When the user puts the index finger into the finger ring formed on the first actuation extension 252 and the thumb into the finger ring formed on the second actuation extension 257, and rotates the actuation extension 252 and the actuation extension 257 with any one or two fingers, the pulley 210 and the first actuation gear 253 fixedly coupled to the first actuation extension 252 rotate around the rotation axis 241, and the pulley 220 and the second actuation gear 258 fixedly coupled to the second actuation extension 257 rotate around the rotation axis 242. At this time, the pulleys 210 and 220 rotate in opposite directions to each other, thereby the wires 301 and 305, one end of which is fixedly coupled to the pulley 210 to be wound thereon, and the wires 302 and 306, one end of which is fixedly coupled to the pulley 220 to be wound thereon, also move in opposite directions to each other. In addition, the aforementioned rotational force is transmitted to the end tool 100 through the power transmission unit 300 , so that two jaws 103 of the end tool 100 are actuated.

[0301] Here, the actuation action refers to the action of opening or closing the two jaws, namely the jaw 101 and the jaw 102, while rotating in opposite directions as described above. That is, when the actuation extension 252 and the actuation extension 257 of the actuation operation part 203 are rotated in a direction approaching each other, the first jaw 101 rotates in a counterclockwise direction and the second jaw 102 rotates in a clockwise direction to close the end tool 100. On the contrary, when the actuation extension 252 and the actuation extension 257 of the actuation operation part 203 are rotated in a direction away from each other, the first jaw 121 rotates in a clockwise direction and the second jaw 122 rotates in a counterclockwise direction to open the end tool 100.

[0302] In the present embodiment, the second handle is composed of the first actuation extension 252 and the second actuation extension 257 for performing the above-mentioned actuation operation, and can be operated by grasping with two fingers. However, the configuration of the actuation operation portion 203 for performing the actuation operation of opening and closing the two jaws of the end tool 100 can also fully realize other modifications different from the above, for example, a configuration in which two actuation pulleys (pulley 210 and pulley 220) are operated oppositely to each other by using one actuation rotating portion, etc.

[0303] Next, the deflection action is as follows.

[0304] When the user rotates the first handle 204 around the rotation axis 243 while gripping the first handle 204, the actuation operation unit 203 and the deflection operation unit 202 deflect and rotate around the rotation axis 243. That is, when the pulley 210 of the first actuation operation unit 251 fixedly coupled with the wires 301 and 305 rotates around the rotation axis 243, the wires 301 and 305 wound around the pulleys 211 and 212 move. Similarly, when the pulley 220 of the second actuation operation unit 256 fixedly coupled with the wires 302 and 306 rotates around the rotation axis 243, the wires 302 and 306 wound around the pulleys 221 and 222 move. At this time, the wires 301 and 305 connected to the first jaw 101 and the wires 302 and 306 connected to the second jaw 102 are wound around the pulleys 211 and 212 and the pulleys 221 and 222, so that the first jaw 101 and the second jaw 102 rotate in the same direction during the deflection rotation. In addition, the above-mentioned rotational force is transmitted to the end tool 100 through the power transmission unit 300, so that the two jaws 103 of the end tool 100 perform a deflection action to rotate in the same direction.

[0305] At this time, since the deflection frame 207 connects the first handle 204 , the rotation axis 241 , the rotation axis 242 , and the rotation axis 243 , the first handle 204 , the deflection operator 202 , and the actuation operator 203 also rotate together around the rotation axis 243 .

[0306] Next, the pitching action is as follows.

[0307] When the user rotates the first handle 204 around the rotation axis 246 while gripping the first handle 204, the actuation operation unit 203, the yaw operation unit 202, and the pitch operation unit 201 pitch and rotate around the rotation axis 246. That is, when the pulley 210 of the first actuation operation unit 251 fixedly coupled to the wires 301 and 305 rotates around the rotation axis 246, the wires 301 and 305 wound around the pulleys 217 and 218 move. Similarly, when the pulley 220 of the second actuation operation unit 256 fixedly coupled to the wires 302 and 306 rotates around the rotation axis 246, the wires 302 and 306 wound around the pulleys 227 and 228 move. At this time, as shown in FIG. Figure 5As described above, the wire 301 and the wire 305 as the first jaw wire move in the same direction, and the wire 302 and the wire 306 as the second jaw wire move in the same direction, so that the wire 301, the wire 305, the wire 302 and the wire 306 as the jaw wires are respectively wound on the pulley 217, the pulley 218, the pulley 227 and the pulley 228 as the main pulleys for deflection of the operating part, thereby causing the first jaw 101 and the second jaw 102 to perform pitch rotation. In addition, the above-mentioned rotational force is transmitted to the end tool 100 through the power transmission part 300, so that the two jaws 103 of the end tool 100 perform pitch motion.

[0308] At this time, the pitch frame 208 is connected to the yaw frame 207, and since the yaw frame 207 is connected to the first handle 204, the rotation axis 241, the rotation axis 242, and the rotation axis 243, when the pitch frame 208 rotates around the rotation axis 246, the yaw frame 207, the first handle 204, the rotation axis 241, the rotation axis 242, and the rotation axis 243 connected to the pitch frame 208 also rotate together. That is, when the pitch operation unit 201 rotates around the rotation axis 246, the actuation operation unit 203 and the yaw operation unit 202 rotate together with the pitch operation unit 201.

[0309] In summary, the electrocautery surgical instrument 10 according to an embodiment of the present invention is characterized in that pulleys are formed at each joint point (actuation joint, deflection joint, pitch joint), and wires (first jaw wires or second jaw wires) are wound around these pulleys, and the rotation operation of the operating part (actuation rotation, deflection rotation, pitch rotation) causes each wire to move, thereby ultimately guiding the end tool 100 to perform the desired action. Furthermore, auxiliary pulleys can be formed on one side of each pulley, and these auxiliary pulleys can prevent the wire from being wound around one pulley multiple times.

[0310] Fig.13 The structure is only schematically shown. Figure 2 FIG. 1 is a diagram showing the configuration of pulleys and guide wires of a joint of an electrocautery surgical instrument 10 according to an embodiment of the present invention. Fig.13 In the embodiment, the intermediate pulley for changing the path of the wire which is not related to the joint action is omitted.

[0311] See also Fig.13 The operating part 200 may include pulleys 210 , 211 , 212 , 213 , 214 , 215 , 216 , 217 , and 218 associated with the rotational movement of the first jaw 101 .

[0312] In addition, the operating portion 200 may include pulleys 220, 221, 222, 223, 224, 225, 226, 227, and 228 associated with the rotational movement of the second jaw 102. (Since the arrangement and configuration of each pulley in the operating portion 200 are the same as those in the end tool 100 in principle, the specific markings of the reference numerals in the drawings are partially omitted.)

[0313] Pulleys 211 and 212 and pulleys 221 and 222 may be formed to be independently rotatable around the same axis of rotation shaft 243. At this time, pulleys 211 and 212 and pulleys 221 and 222 may be formed of two pulleys that are formed to face each other and are independently rotatable.

[0314] The pulleys 213 and 214 and the pulleys 223 and 224 may be formed to be independently rotatable about the rotation axis 244 as the same axis. In this case, the pulleys 213 and 214 may be formed of two pulleys formed to face each other and to be independently rotatable, in which case the two pulleys may be formed to have different diameters. Similarly, the pulleys 223 and 224 may be formed of two pulleys formed to face each other and to be independently rotatable, in which case the two pulleys may be formed to have different diameters.

[0315] The pulleys 215 and 216 and the pulleys 225 and 226 may be formed to be independently rotatable around the same axis of the rotation shaft 245. At this time, the pulleys 215 and 216 may be formed to have different diameters. In addition, the pulleys 225 and 226 may be formed to have different diameters.

[0316] The pulleys 217 and 218 and the pulleys 227 and 228 may be formed to be independently rotatable around the rotation shaft 246 as the same axis.

[0317] The wire 301 passes through the pulley 217, the pulley 215, the pulley 213, and the pulley 211 of the operation part 200 in sequence, is wound around the pulley 210, and is then coupled to the pulley 210 through the fastener 324. On the other hand, the wire 305 passes through the pulley 218, the pulley 216, the pulley 214, and the pulley 212 of the operation part 200 in sequence, and is then coupled to the pulley 210 through the fastener 324. Therefore, when the pulley 210 rotates, the wire 301 and the wire 305 are also wound around the pulley 210 or unwound from the pulley 210, thereby rotating the first jaw 101.

[0318] The wire 306 passes through the pulley 227, the pulley 225, the pulley 223, and the pulley 221 of the operation part 200 in sequence, is wound around the pulley 220, and is then coupled to the pulley 220 by the fastener 327. On the other hand, the wire 302 passes through the pulley 228, the pulley 226, the pulley 224, and the pulley 222 of the operation part 200 in sequence, and is then coupled to the pulley 220 by the fastener 327. Therefore, when the pulley 220 rotates, the wire 302 and the wire 306 are also wound around the pulley 220 or unwound from the pulley 220, thereby rotating the second jaw 102.

[0319] Therefore, the actuation operation, the yaw operation, and the pitch operation can be operated independently of each other.

[0320] 1 , the respective rotation axes of the actuation operator 203 , the yaw operator 202 , and the pitch operator 201 are located behind each operator, and therefore, their configuration is the same as the joint configuration of the end tool, thereby enabling the user to perform intuitively consistent operations.

[0321] In particular, the electrocautery surgical instrument 10 according to an embodiment of the present invention is characterized in that pulleys are formed at various joints (actuation joints, deflection joints, and pitch joints), and wires (first jaw wires or second jaw wires) are wound around these pulleys, and the rotation operation of the operating portion (actuation rotation, deflection rotation, and pitch rotation) causes each wire to move, thereby ultimately guiding the end tool 100 to perform the desired action. Further, auxiliary pulleys can be formed on one side of each pulley, and these auxiliary pulleys can prevent the wires from being wound around one pulley multiple times, so that the wires wound around the pulleys do not contact each other, and the paths of the wires wound into the pulleys and the wires unwound from the pulleys are safely formed, thereby improving the safety and efficiency of wire transmission power.

[0322] On the one hand, as described above, the deflection operator 202 and the actuation operator 203 are directly formed on the first handle 204. Therefore, when the first handle 204 rotates around the rotation axis 246, the deflection operator 202 and the actuation operator 203 also rotate together with the first handle 204. Therefore, the coordinate system of the deflection operator 202 and the actuation operator 203 is not fixed, but relatively changes continuously with the rotation of the first handle 204. That is, in Figure 2 In the embodiment of the present invention, the deflection operator 202 and the actuation operator 203 are shown to be parallel to the Z axis. However, when the first handle 204 is rotated, the deflection operator 202 and the actuation operator 203 are not parallel to the Z axis. That is, the coordinate system of the deflection operator 202 and the actuation operator 203 changes with the rotation of the first handle 204. However, in this specification, unless otherwise specified, for the convenience of description, the coordinate system of the deflection operator 202 and the actuation operator 203 is shown to be parallel to the Z axis. Figure 2The coordinate systems of the deflection operating portion 202 and the actuation operating portion 203 are described based on the vertical position state of the first handle 204 relative to the connecting portion 400.

[0323] <Insulation structure of wire>

[0324] Here, a feature of the surgical instrument 10 according to an embodiment of the present invention is that the wire 301 is inserted into the shrinkable tube 331 , and the shrinkable tube 331 is inserted into the shaft tube 341 , so that the wire 301 and the shaft tube 341 are not in direct contact but are insulated from each other.

[0325] In detail, in the existing surgical instruments, a wire made of a metal material as a conductor is directly combined with a shaft tube made of a metal material as a conductor. That is, one end of the wire is inserted into a shaft tube having a hollow portion formed therein, and then the wire and the shaft tube are combined by crimping them. Crimping here refers to combining two or more metals or other soft materials together so that one or both materials are deformed to fix the other. In this case, since the conductors are directly combined with each other, there is a flow of electric wires around the wire and the shaft tube (see Figure 5 The problem of current leakage (411 and 412) in the circuit breaker causing discharge or spark generation is described in more detail below.

[0326] If there is metal (conductor or shaft tube) around the wire through which current flows, the air filling the space between the wire and the metal may be used as a medium, so that electrical coupling occurs between the wire and the metal. Generally, capacitive coupling or inductive coupling may occur, and especially when high-frequency / high-voltage energy flows through the wire, an induced voltage is formed in the metal through the coupling.

[0327] Here, the closer the distance between the wire and the metal is, and the larger the area in which the wire and the metal face each other (ie, are adjacent to and face each other), the stronger the voltage induced by the electrical coupling is.

[0328] In addition, before a closed loop is formed between the jaws and return electrode of the distal end of the end tool connected to the wire and the body tissue of the operator, sparks may be generated when the metal (wire) to which voltage is induced contacts the body tissue.

[0329] Moreover, when metal with induced voltage contacts tissue, 1) if the voltage flowing through the wire is high, the possibility of sparking increases; 2) if the current density is high, the area where the wire and metal face each other is small, so even if the total current is small, sparks will be generated in body tissue, causing tissue burning.

[0330] In order to solve the above-mentioned problem, in the surgical instrument 10 according to an embodiment of the present invention, the shrink tube 331 is interposed in the middle position between the wire 301 and the shaft tube 341, thereby reducing the overall length of the metal that can induce voltage. That is, the voltage induced in the portion of the shaft tube 341 is cut off by the shrink tube 331, so that it is not transmitted toward the jaws 101 and the jaws 102, and only the voltage induced in the portion of the wire 301 is transmitted toward the jaws 101 and the jaws 102.

[0331] Therefore, by reducing the area where the wire and the metal face each other, the amount of induced voltage can be reduced, thereby greatly reducing the possibility of burning body tissue even if the wire contacts the body tissue.

[0332] In other words, a feature of the surgical instrument 10 according to an embodiment of the present invention is that the wire 301 is inserted into the shrinkable tube 331 as an insulator, and the shrinkable tube 331 is inserted into the shaft tube 341, so that the wire 301 and the shaft tube 341 are not in direct contact but insulated from each other, thereby improving the insulation performance of the surgical instrument 10. A more detailed description of this is as follows.

[0333] As described above, one end 301a of the wire 301 is coupled to the pulley 111 as the end tool jaw pulley. In addition, the other end 301b of the wire 301 is inserted into one end 331a of the shrink tube 331. Here, the shrink tube 331 is also called a heat shrink tube, and is made of thermoplastic plastic that changes shape when heat is applied and processed into a shape such as a straw.

[0334] The inner diameter of the shrink tube 331 as described above is initially formed to be somewhat larger than the diameter of the wire 301, and after the wire 301 is inserted into the shrink tube 331, when heat is applied to the shrink tube 331 using a heating gun or the like, the shrink tube 331 shrinks (i.e., is thermally deformed) and is closely bonded to the wire 301. That is, the shrink tube 331 becomes a covering material of the wire 301. As the shrink tube 331 as described above, an insulating material such as a polyolefin shrink tube, a fluoroelastomeric polymer tube, or a PVF tube can be used.

[0335] As described above, after the other end 301b of the wire 301 is inserted into the one end 331a of the shrink tube 331, the shrink tube 331 is heated to tightly bond the shrink tube 331 and the wire 301 so that the other end 301b of the wire 301 as a conductor can be insulated.

[0336] Here, the other end 301b of the wire 301 is completely accommodated in the shrink tube 331, so that the other end 301b of the wire 301 may not protrude outside the other end 331b of the shrink tube 331. Only in this way can the wire 301 and the shaft tube 341 be completely physically separated and insulated.

[0337] On the other hand, the other end 331b of the shrink tube 331 opposite to the one end 331a into which the wire 301 is inserted is inserted into the shaft tube 341. Here, the shaft tube 341 has a hollow portion formed therein and is formed in the shape of a long extension tube. The shaft tube 341 can be formed of, for example, a stainless steel (Steel Use Stainless, SUS) material.

[0338] Specifically, due to the connection portion (see Figure 2 400 in FIG. 4 is relatively long, so when a strong tension is applied to the wire 301, the wire 301 may be at the connection portion (see Figure 2 In order to prevent the wire 301 from sagging, the connection part (see Figure 2 The shaft tube 341 can be used inside the end tool (see Figure 2 100) and the operation part (see Figure 2 200) in the connection part (see Figure 2 400) of the straight line (see Figure 2 401 in the figure) is provided with an axis tube 341, which is relatively thicker than the wire and is not easily deformed, and the end tool (see Figure 2 100) side of the wire and the operating part (see Figure 2 The wires on the 200) side can be connected through the shaft tube 341.

[0339] As described above, in a state where the shrinkable tube 331 into which the lead wire 301 is inserted is inserted into the shaft tube 341 , the shrinkable tube 331 and the shaft tube 341 are crimped to combine the shrinkable tube 331 and the shaft tube 341 .

[0340] At this time, at least a portion of the wire 301 , the shrink tube 331 , and the shaft tube 341 may overlap each other in position, and the overlapping region S may be crimped.

[0341] As described above, the shrink tube 331 as an insulator is interposed between the wire 301 as a conductor and the shaft tube 341, so that the wire 301 and the shaft tube 341 are physically completely separated and do not contact each other, thereby insulating the wire 301 and the shaft tube 341. In this way, the insulation performance of the surgical instrument 10 can be improved.

[0342] On the other hand, the accompanying drawings show that the pulley 111 serving as the first jaw pulley of the end tool is combined with the wire 301 serving as the first jaw wire, but the spirit of the present invention is not limited to this, and the wires 301 and 305 serving as the first jaw wires, the wires 302 and 306 serving as the second jaw wires, and the wires 303 and 304 serving as the pitch wires may also be similarly applicable.

[0343] Here, as shown in the figure, a plurality of wires are provided, and accordingly, a plurality of shrink tubes and shaft tubes are also provided. Moreover, the plurality of wires and the plurality of shaft tubes can be formed so as not to directly face each other in any operation state. And for this purpose, each shrink tube can be formed to have a sufficient length so that each wire and each shaft tube do not directly face each other.

[0344] In detail, the wire 301, the wire 302, the wire 303, the wire 304, the wire 305, and the wire 306 each move forward or backward according to the operation of the operating part 200. At this time, the movement range of the wire 301, the wire 302, the wire 303, the wire 304, the wire 305, and the wire 306 is defined corresponding to the rotation range of the jaws 101 and the jaws 102. For example, Fig.15 As shown, the jaws 101 and 102 can rotate within a range of approximately ±120°, and accordingly, the moving ranges of the wires 301 and 305 as the first jaw wires and the wires 302 and 306 as the second jaw wires are determined. At this time, the shrink tube is formed to have a sufficient length so that each wire and each shaft tube do not directly face each other even when any one wire is moved forward to the maximum extent and when the other wire is moved backward to the maximum extent.

[0345] For example, Fig.15 As shown, even when the second jaw 102 is rotated to the maximum extent in the L direction so that the guide wire 302 moves backward to the maximum extent and the guide wire 306 moves forward to the maximum extent, the shrink tube 332 is interposed between the guide wire 302 and the shaft tube 346, so that the guide wire 302 and the shaft tube 346 do not directly face each other. And this can be applied to all guide wires, all shaft tubes, and all shrink tubes in the same manner.

[0346] As described above, the plurality of wires and the plurality of shaft tubes are formed so that they do not directly face each other in any operating state, so that the voltage induced in the portion of the shaft tube 341 is not transmitted to the voltage induced in the portion of the wire 301. And, by thus reducing the area where the wire and the metal face each other, the amount of induced voltage can be reduced, thereby greatly reducing the possibility of burning the body tissue even if the wire contacts the body tissue.

[0347] On the other hand, a method for manufacturing the surgical instrument 10 according to an embodiment of the present invention is as follows.

[0348] First, the other end 301b of the wire 301 is inserted into the shrink tube 331. At this time, the wire 301 is inserted so that the other end 301b of the wire 301 does not protrude outside the other end 331b of the shrink tube 331. Only in this way can the wire 301 and the shaft tube 341 be completely physically separated and insulated.

[0349] Next, when the shrink tube 331 is heated, the shrink tube 331 is closely combined with the wire 301. That is, when heat is applied to the shrink tube 331 using a heating gun or the like after the wire 301 is inserted into the shrink tube 331, the shrink tube 331 shrinks (i.e., thermally deforms) and closely combines with the wire 301.

[0350] Next, the other end 331b of the shrink tube 331 opposite to the one end into which the wire 301 is inserted is inserted into the shaft tube 341. Here, the shaft tube 341 has a hollow portion formed therein and is formed in the shape of a long extension tube. The shaft tube 341 can be formed of, for example, a stainless steel (SUS) material.

[0351] Next, the wire 301, the shrink tube 331, and the shaft tube 341 are crimped together. At this time, at least a portion of the wire 301, the shrink tube 331, and the shaft tube 341 may overlap each other in position, and the overlapping area S may be crimped.

[0352] As described above, the shrink tube 331 as an insulator is interposed between the wire 301 as a conductor and the shaft tube 341, so that the wire 301 and the shaft tube 341 are physically completely separated and do not contact each other, thereby insulating the wire 301 and the shaft tube 341. In this way, the insulation performance of the surgical instrument 10 can be improved.

[0353] <Variation of the First Embodiment> (Insulation Structure of Wire)

[0354] Hereinafter, an electrocautery surgical instrument according to a modified example of the first embodiment of the present invention will be described. Here, the electrocautery surgical instrument according to the modified example of the first embodiment of the present invention is different from the surgical instrument according to the first embodiment of the present invention (see Figure 2 Compared with 10) in the above, the configuration of the wires is characteristically different.

[0355] Fig.17 It is shown Fig.16 FIG. 2 is a diagram of another variation of the embodiment disclosed in FIG.

[0356] A feature of a surgical instrument 10 according to a variation of the first embodiment of the present invention is that a wire 301 is inserted into a shrinkable tube 331 serving as an insulator, and the shrinkable tube 331 is inserted into a shaft tube 341, so that the wire 301 and the shaft tube 341 are not in direct contact but are insulated from each other, thereby improving the insulation performance of the surgical instrument 10.

[0357] The shrink tube 331 as described above may be made of an insulating material, such as a polytetrafluoroethylene (PTFE) tube, a polyolefin shrink tube, a fluoroelastomer polymer tube, a PVF tube, and the like.

[0358] At this time, at least a portion of the wire 301 , the shrink tube 331 , and the shaft tube 341 may overlap each other in position, and the overlapping region S may be crimped.

[0359] As described above, the shrink tube 331 as an insulator is interposed between the wire 301 as a conductor and the shaft tube 341, so that the wire 301 and the shaft tube 341 are physically completely separated and do not contact each other, thereby insulating the wire 301 and the shaft tube 341. In this way, the insulation performance of the surgical instrument 10 can be improved.

[0360] Here, the difference between this modification and the first embodiment described above is that the shrink tube 331 is applied to the entire wire 301. That is, it can be said that the entire wire 301 is inserted into the shrink tube 331. Of course, as in the first embodiment, the end of the wire 301 inserted into the shaft tube 341 can be formed to be completely accommodated in the shrink tube 331, so that the end of the wire 301 can not protrude outside the end of the shrink tube 331.

[0361] Therefore, the wire 301 has insulation properties in all running parts in the end tool 100 , and can also reduce the risk of electrical coupling between the wire 301 and other components made of metal materials such as the end tool center 180 and the pitch center 107 .

[0362] On the other hand, the accompanying drawings show that the pulley 111 serving as the first jaw pulley of the end tool is combined with the wire 301 serving as the first jaw wire, but the spirit of the present invention is not limited to this, and the wires 301 and 305 serving as the first jaw wires, the wires 302 and 306 serving as the second jaw wires, and the wires 303 and 304 serving as the pitch wires may also be similarly applicable.

[0363] Therefore, when the plurality of wires move forward or backward according to the operation of the operating portion, even when any one of the wires moves forward to the maximum extent and when another wire moves backward to the maximum extent, each wire and each shaft tube do not directly face each other, so that the voltage induced in the portion of the shaft tube 341 is not transmitted to the voltage induced in the portion of the wire 301. And, by thus reducing the area where the wires and the metal face each other, the amount of induced voltage can be reduced, thereby greatly reducing the possibility of burning the body tissue even if the wires come into contact with the body tissue.

[0364] <Second Embodiment> (Auxiliary Pulley and Hook)

[0365] Hereinafter, the end tool 500 of the electrocautery surgical instrument 20 according to the second embodiment of the present invention will be described. Here, the end tool 500 of the electrocautery surgical instrument according to the second embodiment of the present invention is different from the end tool of the surgical instrument according to the first embodiment of the present invention (see Figure 2 Compared with the 100 in the embodiment, the number of jaws and the configuration of the auxiliary pulleys are different in features. As described above, the configuration different from the first embodiment will be described in detail later.

[0366] Fig.18 and Fig.19 1 is a perspective view showing a distal end tool of an electrocautery surgical instrument according to a second embodiment of the present invention. Fig.19 The state in which the end tool center and the pitch center are removed is shown.

[0367] like Fig.18 and Fig.19 As shown, the end tool 500 of the second embodiment of the present invention may include a jaw 501. That is, in this embodiment, as an example of an instrument for electrocautery surgery, a monopolar hook as a single-arm cauterizer is shown. Of course, the spirit of the present invention is not limited to this, and can be applied to various monopolar electrocautery surgery instruments, such as a monopolar spatula, etc.

[0368] The end tool 500 may include pulleys 511 , 512 , 513 , 514 , 515 , and 516 associated with the rotational movement of a jaw 501 .

[0369] Here, although the drawings show that each pulley facing each other is formed in parallel, the spirit of the present invention is not limited thereto, and each pulley can be formed at various positions suitable for the configuration of the end tool and can also be formed into various sizes suitable for the configuration of the end tool.

[0370] Furthermore, an end tool 500 according to the second embodiment of the present invention may include an end tool center 506 and a pitch center 507 .

[0371] The rotating shaft 541 and the rotating shaft 542 described later are inserted through the end tool center 506, and at least a portion of the jaw 501 having the shaft coupled to the rotating shaft 541 can be accommodated inside the end tool center 506. In addition, the end tool center 506 can accommodate at least a portion of the pulley 512 having the shaft coupled to the rotating shaft 542 inside.

[0372] In addition, a pulley 531 used as an end tool pitch pulley may be formed at one end of the end tool center 506. Fig.18 As shown, the pulley 531 and the end tool center 506 may be formed as one body. That is, a groove in which the wire can be wound may be formed inside the end tool center 506. Alternatively, the pulley may be formed as a separate member distinguished from the end tool center 506, thereby being combined with the end tool center 506. The wire 303 and the wire 304 described above are combined to the pulley 531 used as the end tool pitch pulley, and the pulley 531 performs a pitching motion while rotating around the rotation axis 543.

[0373] The rotation shaft 543 and the rotation shaft 544 described later are inserted through the pitch center 507, and the pitch center 507 can be axially coupled with the end tool center 506 and the pulley 531 through the rotation shaft 543. Therefore, the end tool center 506 and the pulley 531 can be formed to be rotatable around the rotation shaft 543 relative to the pitch center 507.

[0374] In addition, the pitch center 507 may accommodate at least a portion of the pulley 513 and the pulley 514 coupled to the rotation axis 543. In addition, the pitch center 507 may accommodate at least a portion of the pulley 515 and the pulley 516 coupled to the rotation axis 544.

[0375] In addition, the end tool 500 of the second embodiment of the present invention may include rotation axes 541, 542, 543, and 544. As described above, the rotation axes 541 and 542 are inserted through the end tool center 506, and the rotation axes 543 and 544 may be inserted through the pitch center 507.

[0376] The rotation axis 541, the rotation axis 542, the rotation axis 543, and the rotation axis 544 may be sequentially arranged from the distal end 504 to the proximal end 505 of the end tool 500. Accordingly, the rotation axis 541 may be referred to as a first pin, the rotation axis 542 as a second pin, the rotation axis 543 as a third pin, and the rotation axis 544 as a fourth pin, starting from the distal end 504.

[0377] Here, the rotation axis 541 is used as the end tool jaw pulley rotation axis, the rotation axis 542 is used as the end tool jaw auxiliary pulley rotation axis, the rotation axis 543 is used as the end tool pitch rotation axis, and the rotation axis 544 can be used as the end tool pitch auxiliary rotation axis of the end tool 500.

[0378] One or more pulleys may be inserted into the rotating shafts 541 , 542 , 543 , and 544 as described above, which will be described in detail below.

[0379] The pulley 511 as the end tool jaw pulley is formed to be independently rotatable around the rotation axis 541 as the end tool jaw pulley rotation axis. Here, the jaw 501 is fixedly coupled to the pulley 511 so as to be able to rotate together with the pulley 511. The end tool 500 performs a yaw motion according to the rotation of the pulley 511. That is, the pulley 511 performs a yaw motion while rotating around the rotation axis 541.

[0380] Here, the jaw 501 and the pulley 511 may be formed as separate members that are distinguished and thus combined with each other, or the jaw 501 and the pulley 511 may also be formed as one-body.

[0381] On the other hand, a pulley 512 as an auxiliary pulley of the end tool jaw can be further equipped on one side of the pulley 511. In other words, the pulley 512 as an auxiliary pulley can be arranged between the pulley 511 and the pulley 513 / pulley 514. The auxiliary pulley as described above will be described in more detail later.

[0382] The pulleys 513 and 514 are used as main pulleys for the end tool jaw pitching, and the pulleys 515 and 516 can be used as auxiliary pulleys for the end tool jaw pitching.

[0383] Hereinafter, description will be made with respect to constituent elements related to the rotation of the pulley 511 .

[0384] Pulley 513 and pulley 514 are used as end tool jaw pitch main pulleys. That is, they are used as main rotation pulleys for the pitching action of jaw 501. Here, wire 301 as a jaw wire is wound around pulley 513, and wire 305 as a jaw wire is wound around pulley 514.

[0385] Pulley 515 and pulley 516 serve as the end tool jaw pitching auxiliary pulleys. That is, they serve as auxiliary rotation pulleys for the pitching action of jaw 501. Here, wire 301 as the jaw wire is wound around pulley 515, and wire 305 as the jaw wire is wound around pulley 516.

[0386] Here, the pulley 513 and the pulley 514 are arranged on one side of the pulley 511 and the pulley 512 in a manner facing each other. Here, the pulley 513 and the pulley 514 are formed to be independently rotatable around the rotation axis 543 as the end tool pitch rotation axis. In addition, the pulley 515 and the pulley 516 are respectively arranged on one side of the pulley 513 and the pulley 514 in a manner facing each other. Here, the pulley 515 and the pulley 516 are formed to be independently rotatable around the rotation axis 544 as the end tool pitch auxiliary rotation axis. Here, although the drawings show that the pulley 513, the pulley 515, the pulley 514 and the pulley 516 are all formed to be rotatable around the Y-axis direction, the spirit of the present invention is not limited thereto, and the rotation axis of each pulley can be formed in a variety of directions suitable for its configuration.

[0387] The wire 301 as the jaw wire is sequentially wound around the pulley 515, the pulley 513, and the pulley 511 so that at least a portion thereof is in contact with the pulley 511, the pulley 512, the pulley 514, and the pulley 516. In addition, the wire 305 connected to the wire 301 by the fastener 323 is sequentially wound around the pulley 511, the pulley 512, the pulley 514, and the pulley 516 so that at least a portion thereof is in contact with the pulley 511, the pulley 512, the pulley 514, and the pulley 516.

[0388] Describing this from another perspective, wire 301 and wire 305, which serve as jaw wires, are wound sequentially thereon so that at least a portion is in contact with pulley 515, pulley 513, pulley 511, pulley 512, pulley 514, and pulley 516, and wire 301 and wire 305 are formed so as to be able to rotate each of the pulleys while moving with the pulleys.

[0389] Therefore, when the wire 301 is pulled, the fastener 323 coupled to the wire 301 and the pulley 511 coupled thereto rotate counterclockwise. Conversely, when the wire 305 is pulled, the fastener 323 coupled to the wire 305 and the pulley 511 coupled thereto rotate clockwise.

[0390] Hereinafter, the pulley 512 serving as an auxiliary pulley will be described in more detail.

[0391] The pulley 512 contacts the wire 305 as the jaw wire to change the setting path of the wire 305 to a certain extent, thereby playing a role in expanding the rotation angle of the jaw 501. That is, when the auxiliary pulley is not provided, the jaw can only rotate to a right angle, however, in one embodiment of the present invention, by additionally providing the pulley 512 as an auxiliary pulley, the effect of expanding the maximum rotation angle can be obtained.

[0392] A more detailed description of this is as follows.

[0393] When the auxiliary pulley is not provided, since the jaw wire is fixedly coupled to the end tool jaw pulley, the end tool jaw pulley can only rotate up to 90° to the left and right. In contrast, in the electrocautery surgical instrument 20 of the present invention, a pulley 512 as an auxiliary pulley is further provided on one side of the pulley 511. By providing the pulley 512 in the manner described above, the setting path of the wire 305 as the jaw wire is changed to a certain extent, thereby changing the tangent direction of the wire 305, and thus, the fastener 326 that combines the wire 305 with the pulley 511 can be rotated up to about 120°. That is, the fastener 326 as the coupling portion of the wire 305 and the pulley 511 can be rotated to the inner common tangent line of the pulley 511, thereby expanding the rotation range in both directions.

[0394] Describing this from another perspective, the wire 301 and the wire 305 are arranged on either side of the plane perpendicular to the Y axis and passing through the X axis through the pulley 512, wherein the wire 301 and the wire 305 are two branches of the jaw wire wound on the pulley 511. Describing this from another perspective, it can be described as pulley 513 and pulley 514 are arranged on either side of the plane perpendicular to the Y axis and passing through the X axis. Describing this from another perspective, the wire 305 is located on the inner tangent of the pulley 511 and the pulley 512, and the rotation angle of the pulley 511 is expanded by the pulley 512.

[0395] According to the present invention as described above, it is possible to obtain an effect of widening the rotation radius of the jaw 501 .

[0396] <Third Embodiment> (End Tool Center / Pitch Center)

[0397] Hereinafter, the end tool 600 of the electrocautery surgical instrument 30 according to the third embodiment of the present invention will be described. Here, the end tool 600 of the electrocautery surgical instrument 30 according to the third embodiment of the present invention is different from the end tool of the electrocautery surgical instrument according to the first embodiment of the present invention (see Figure 4Compared to 100 in the figure, the configuration of the end tool center 605 and the pitch center 607 are characteristically different.

[0398] Fig. 20 1 is a perspective view showing a tip tool center 606 and a pitch center 607 of the electrocautery surgical instrument 30 according to the third embodiment of the present invention.

[0399] The common contents such as the structure and connection relationship of the end tool center 606 and the pitch center 607 are the same as those described above for the electrocautery surgical instrument according to the first embodiment, and therefore, only the parts with different features are described here.

[0400] Since the end tool center 606 and the pitch center 607 are formed of a metal material, there is a risk that the current flowing through the wires inside the end tool center 606 and the pitch center 607 may leak or electrical coupling may occur between the wires and the metal.

[0401] Therefore, in order to distinguish from the insulation of the above-mentioned wires, the end tool center 606 and the pitch center 607 need to be insulated to prevent problems such as electrical coupling from occurring in the end tool.

[0402] That is, the surfaces of the end tool center 606 and the pitch center 607 of the metal material may be coated with a material having an insulating property so that the end tool center 606 and the pitch center 607 have an insulating structure.

[0403] As described above, ceramics, polyparaxylene, etc. can be used as insulating materials for coating metal surfaces, and examples of ceramic coating materials can include aluminum oxide, fused quartz, and magnesium oxide. As a method for coating ceramics on metals, the following various methods can be used. For example, various deposition methods such as enamel coating, thermal spray coating, physical vapor deposition (PVD), and chemical vapor deposition (CVD) can be used.

[0404] <Fourth Embodiment> (Insulating Pulley)

[0405] Hereinafter, the end tool 700 of the electrocautery surgical instrument 40 according to the fourth embodiment of the present invention will be described. Here, the end tool 700 of the electrocautery surgical instrument 40 according to the fourth embodiment of the present invention is different from the end tool of the electrocautery surgical instrument according to the first embodiment of the present invention (see Figure 4 Compared with 100 in the examples above, the configuration of the end tool center and the pulley are different in characteristics.

[0406] Fig.21a and Figure 21b1 is a perspective view showing a distal end tool of an instrument for electrocautery surgery according to a fourth embodiment of the present invention, Fig.21c It is shown Fig.21a and Figure 21b A perspective view of the insulating pulley of the end tool shown in FIG. Fig.21d It is shown Fig.21a and Figure 21b A perspective view of the center of the end tool shown in . Here, Figure 21b The state in which the pitch center is removed is shown.

[0407] See also Fig.21a and Figure 21b The end tool 700 of the fourth embodiment of the present invention may include a pair of jaws, namely a first jaw 701 and a second jaw 702. The end tool 700 may include pulleys 711, 713, 714, 715, and 716 associated with the rotational movement of the first jaw 701. In addition, pulleys 721, 723, 724, 725, and 726 associated with the rotational movement of the second jaw 702 may be included.

[0408] In addition, the end tool 700 of the first embodiment of the present invention may include an end tool center 780 and a pitch center 707. The end tool center 780 described above will be described in more detail later.

[0409] In addition, the end tool 700 of the fourth embodiment of the present invention may include a rotation axis 741, a rotation axis 743, and a rotation axis 744. The rotation axis 741 is inserted through the end tool center 780, and the rotation axes 743 and 744 may be inserted through the pitch center 707.

[0410] In the fourth embodiment of the present invention, the first jaw 701 and the second jaw 702, the pitch center 707, each pulley and each rotation axis are the same as those of the first embodiment. Figure 4 The end tool 100 described in FIG. 1 is substantially the same as that described in FIG. 1 , and therefore, a detailed description thereof will be omitted here.

[0411] Hereinafter, the end tool center 780 according to the fourth embodiment of the present invention will be described in more detail, and in particular, the pulley 731 formed at one end of the end tool center 780 and used as an end tool pitch pulley will be described with emphasis.

[0412] A rotating shaft 741 described later is inserted through the end tool center 780, and the pulley 711 and the pulley 721 axially coupled to the rotating shaft 741, and at least a portion of the first jaw 701 and the second jaw 702 coupled thereto can be accommodated inside the end tool center 780. Here, one feature of the fourth embodiment of the present invention is that a pulley 731 serving as an end tool pitch pulley is formed on the end tool center 780.

[0413] Here, the pulley 731 may be formed as a separate member distinguished from the end tool center 780 to be combined with the end tool center 780. That is, Figure 4 The pulley 131 of the end tool center 180 is shown as an example in which the pulley 131 is formed as a one-body with the end tool center, but Fig.21a and Figure 21b As shown, the pulley 731 of the end tool center 780 according to the fourth embodiment of the present invention can be said to be an independent configuration that can be separated and distinguished from the end tool center 780.

[0414] In detail, the end tool center 780 may have a pitch pulley portion 785 formed in a direction opposite to the direction in which the jaw pulley coupling portion of the jaw coupling is formed. Also, a pulley 731 as a pitch pulley may be formed on the pitch pulley portion 785, and the wire 303 and the wire 304 as pitch wires may be wound around the pulley 731. Here, the pulley 731 serves as a member rotating around an axis and may be used as an end tool pitch pulley. Here, the pitch pulley portion 785 may be formed on an XZ plane. In addition, a through hole through which the rotation shaft 743 can be inserted may be formed in the pitch pulley portion 785. That is, the pitch pulley portion 785 and the pulley 731 are formed as separate members, and the rotation shaft 743 is inserted through the pitch pulley portion 785 and the pulley 731, so that the two members can be coupled.

[0415] On the other hand, the pulley 731 may include at least one or more coupling portions that fix the pulley 731 to the end tool center 780. For example, in addition to the through hole 731a through which the rotating shaft 743 can be inserted, the pulley 731 may be further formed with one or more through holes 731b. In addition, the pitch pulley portion 785 is formed with a protrusion 785b protruding in the direction of the pulley 731 on a surface that contacts the pulley 731, and the protrusion 785b can be coupled with the through hole 731b. That is, when the protrusion 785b formed on the pitch pulley portion 785 is coupled with the through hole 731b of the pulley 731 to rotate the pulley 731 around the rotating shaft 743, the end tool center 780 can also rotate together. For example, Fig.21cThe pulley 731 shown is formed with a through hole 731a for inserting the rotating shaft 743 in the center, and two through holes 731b are additionally formed, and the additional through hole 731b is combined with the protrusion 785b of the pitch pulley part 785, so that the rotation of the pulley 731 can be transmitted to the pitch pulley part 785. However, the spirit of the present invention is not limited to this, and the number, position and size of the through holes can be formed in various ways. In addition, of course, a protrusion can be formed on the pulley 731, and a through hole as a combination portion can be formed on the pitch pulley part 785.

[0416] Continuing to describe the pulley 731, the pulley 731 of the fourth embodiment of the present invention is characterized by having insulation. That is, the pulley 731 used as the end tool pitch pulley includes an insulator, and the end tool center 780 and the fastener 325 are separated by the pulley 731 having insulation, so that the end tool center 780 and the fastener 325 can be insulated from each other.

[0417] In detail, the metal fastener 325 is combined with the pulley 731 having insulation, and the pulley 731 is combined with the metal end tool 780. That is, the fourth embodiment of the present invention is different from the above-mentioned embodiments in that the fastener 325 of the pitch wire does not directly contact the metal end tool center 780, but the pulley 731 having insulation is interposed between the end tool center 780 and the fastener 325, so that the metal fastener 325 and the metal end tool center 780 are physically completely separated.

[0418] As described above, the pulley 731 having insulation is interposed between the end tool center 780 and the fastener 325 , thereby preventing sparks from being generated when the fastener 325 of a metal material coupled to the end of the pitch wire contacts the end tool center 780 of a metal material.

[0419] The pulley 731 having insulation may be formed of plastic, ceramic, etc. For example, the pulley 731 may be made of polyetheretherketone (PEEK), phenolic resin, polycarbonate, and glass fiber reinforced plastic (GRP), and may be plastic coated with ceramic.

[0420] On the other hand, the wires 303 and 304 are coupled to a pulley 731 serving as a pitch pulley of the end tool, and the pulley 731 performs a pitching motion while rotating about a rotation axis 743 .

[0421] Here, the wire 303 and the wire 304 can be used as a pair of pitch wires. In addition, it can include a fastener 325 coupled to the end of the wire to couple the wire with the pulley. Here, each fastener can have various shapes as required, for example, a ball and a tube, etc.

[0422] The lead wire 303 and the lead wire 304 as the elevation lead wire may be a single lead wire. That is, after the fastener 325 is inserted into the middle point of the elevation lead wire as a single lead wire and the fastener 325 is fixed by crimping, the two branches of the elevation lead wire may be respectively called the lead wire 303 and the lead wire 304 with the fastener 325 as the center.

[0423] Alternatively, the wire 303 and the wire 304 serving as the elevation wire may be formed as separate wires, respectively, and the wire 303 and the wire 304 may be connected by a fastener 325 .

[0424] Furthermore, since the fastener 325 is coupled to the pulley 731, the wire 303 and the wire 304 can be fixedly coupled to the pulley 731. Thus, the pulley 731 can rotate as the wire 303 and the wire 304 are pulled and released.

[0425] Rotation shafts 743 and 744 are inserted through pitch center 707, and pitch center 707 is axially coupled to end tool center 780 and pulley 731 through rotation shaft 743. Therefore, end tool center 780 and pulley 731 can be formed to be pitch-rotatable relative to pitch center 707 around rotation shaft 743.

[0426] <Fifth Embodiment> (Combining Conductor and Wire)

[0427] Hereinafter, the electrocautery surgical instrument according to the fifth embodiment of the present invention will be described. Here, the electrocautery surgical instrument according to the fifth embodiment of the present invention is different from the surgical instrument according to the first embodiment of the present invention (see Figure 2 Compared with 10) in the embodiment, the configuration of the wire is different in characteristics. As described above, the configuration different from the first embodiment will be described in detail later.

[0428] Fig. 22 1 is a diagram showing a connection arrangement of a jaw pulley and a guide wire in a tip tool of an electrocautery surgical instrument according to a fifth embodiment of the present invention.

[0429] See also Fig. 22The end tool 800 of the electrocautery surgical instrument according to the fifth embodiment of the present invention has a pair of jaws for gripping, namely a first jaw 801 and a second jaw 802. Here, the first jaw 801 and the second jaw 802, or a component including the first jaw 801 and the second jaw 802, can be referred to as a jaw 803.

[0430] Pulley 811 is used as the first jaw pulley of the end tool, and pulley 821 is used as the second jaw pulley of the end tool. Pulley 811 can be called the first jaw pulley, pulley 821 can be called the second jaw pulley, and these two components can also be collectively called the end tool jaw pulley.

[0431] Pulley 811 and pulley 821, which are jaw pulleys of the end tool, are formed to face each other and are formed to be independently rotatable around a rotation axis 841, which is a rotation axis of the jaw pulleys of the end tool. Here, although pulley 811 and pulley 821 are formed to rotate around one rotation axis 841 in the accompanying drawings, each jaw pulley can of course be formed to be rotatable around a separate axis. Here, the first jaw 801 is fixedly coupled to the pulley 811 to rotate together with the pulley 811, and the second jaw 802 can be fixedly coupled to the pulley 821 to rotate together with the pulley 821. The yaw action and actuation action of the end tool 800 are performed according to the rotation of the pulley 811 and the pulley 821. That is, when the pulley 811 and the pulley 821 rotate in the same direction about the rotation axis 841, the end tool 800 performs a yawing action, and when the pulley 811 and the pulley 821 rotate in opposite directions about the rotation axis 841, the end tool 800 performs an actuating action.

[0432] On the other hand, the power transmission unit 300 of the electrocautery surgical instrument according to the fifth embodiment of the present invention may include a wire 301 , a wire 302 , a wire 303 , a wire 304 , a wire 305 , and a wire 306 .

[0433] Here, the wire 301 and the wire 305 can be used as a first jaw wire in pair. The wire 302 and the wire 306 can be used as a second jaw wire in pair. Here, the component including the wire 301 and the wire 305 as the first jaw wire, and the wire 302 and the wire 306 as the second jaw wire can be referred to as a jaw wire. In addition, the wire 303 and the wire 304 can be used as a pitch wire in pair.

[0434] Here, one feature of the electrocautery surgical instrument 50 according to the fifth embodiment of the present invention is that the lead wire is covered with a wire sheath. That is, the entire lead wire can be wrapped with an insulating material and formed into an electric wire.

[0435] In detail, the wire 301 is covered with a wire sheath, so it may be referred to as a wire 351 , and the wire 302 may be referred to as a wire 352 , the wire 305 may be referred to as a wire 355 , and the wire 306 may be referred to as a wire 356 , respectively.

[0436] In the electrocautery surgical instrument 10 of the first embodiment of the present invention, each wire is used to transmit power from the operating portion 200 to the end tool 100 , and electric energy is transmitted from the connector 410 to the jaws 103 through separate wires 411 and 412 .

[0437] In contrast, in the electrocautery surgical instrument 50 according to the fifth embodiment of the present invention, the wire can transmit power from the operating portion 200 to the end tool 100 while transmitting electrical energy from the connector 410 to the jaws 803. Specifically, the wires 301 and 305 as the first jaw wires and the wires 302 and 306 as the second jaw wires can be formed of wires 351, 355, 352, and 356, respectively, and the wire sheath can be formed of a material such as perfluoroalkoxy alkanes (PFA).

[0438] On the other hand, the first jaw 801 may be formed of a conductor such as metal and connected to the electric wire. In other words, the electric wire 351 may include an area (fastening area, not shown) from which the sheath has been removed at the end portion combined with the first jaw 801, and the area from which the sheath has been removed is in contact with the first jaw 801, so that electric energy can be transmitted to the first jaw 801 as a conductor. Describing this from another perspective, it can be said that the electric wire 351 is covered with a sheath except for the portion combined with the first jaw 801, and is wound around the pulley 811. At this time, the pulley 811 may be formed of an insulator (nonconductor) such as ultem, ceramic, and plastic.

[0439] In other words, the electric wire 351 is wound around the pulley 811 as an insulator, and the fastening area (not shown) as the end of the electric wire 351 is combined with the first jaw 801 as a conductor. That is, the first jaw 801 connected to the electric wire 351 is combined with the pulley 811, and the electric wire 351 is wound around the pulley 811 as an insulator so as to extend toward the operating portion (not shown) side.

[0440] On the other hand, the electric wire 355 may also include a region (fastening region, not shown) from which the sheath has been removed at the end portion coupled to the first jaw 801, and the region from which the sheath has been removed contacts the first jaw 801, thereby enabling electric energy to be transmitted to the first jaw 801 as a conductor. Describing this from another perspective, it can be said that the electric wire 355 is covered with a sheath except for the portion coupled to the first jaw 801, and is wound around the pulley 811. The first jaw 801 connected to the electric wire 355 is coupled to the pulley 811, and the electric wire 355 is wound around the pulley 811 as an insulator so as to extend toward the operating portion (not shown) side.

[0441] Alternatively, the wire 351 and the wire 355 as the wires connected to the first jaw may be a single wire. That is, the sheath at the middle point of the single wire is stripped, and then the fastener 328 is inserted into the stripped sheath portion, and the fastener 328 is fixed by crimping, and then the two branches of the wire can be respectively called the wire 351 and the wire 355 with the fastener 328 as the center.

[0442] Similarly, the second jaw 802 may be formed of a conductor such as metal and connected to the electric wire. In other words, the electric wire 352 may include an area (fastening area, not shown) from which the sheath has been removed at the end portion combined with the second jaw 802, and the area from which the sheath has been removed contacts the second jaw 802, thereby transmitting electric energy to the second jaw 802 as a conductor. Describing this from another perspective, it can be said that the electric wire 352 is covered with a sheath except for the portion combined with the second jaw 802, and is wound around the pulley 821. At this time, the pulley 821 may be formed of an insulator (nonconductor) such as ultem, ceramic, and plastic.

[0443] In other words, the electric wire 352 is wound around the pulley 821 as an insulator, and the fastening area (not shown) as the end of the electric wire 352 is combined with the second jaw 802 as a conductor. That is, the second jaw 802 connected to the electric wire 352 is combined with the pulley 821, and the electric wire 352 is wound around the pulley 821 as an insulator so as to extend toward the operating portion (not shown) side.

[0444] On the other hand, the electric wire 356 may also include a region (fastening region, not shown) from which the coating has been removed at the end portion coupled to the second jaw 802, and the region from which the coating has been removed contacts the second jaw 802, thereby transmitting electric energy to the second jaw 802 as a conductor. Describing this from another perspective, it can be said that the electric wire 356 is covered with the coating except for the portion coupled to the second jaw 802, and is wound around the pulley 821. The second jaw 802 connected to the electric wire 356 is coupled to the pulley 821, and the electric wire 356 is wound around the pulley 821 as an insulator, thereby extending toward the operating portion (not shown) side.

[0445] As described above, by changing the conductive wire to an electric wire, the conductive wire can perform the electric energy transmission function while performing the power transmission function, and there is no need to equip a separate electric wire and a pulley wrapped with the electric wire, etc., thereby reducing various configurations and simplifying the process.

[0446] <Sixth Embodiment> (Monopolar Dissector)

[0447] Hereinafter, the end tool 1100 of the electrocautery surgical instrument 60 according to the sixth embodiment of the present invention will be described. Here, the end tool 1100 of the electrocautery surgical instrument according to the sixth embodiment of the present invention is different from the end tool of the surgical instrument according to the first embodiment of the present invention (see Figure 2 Compared with 100 in the embodiment, the configuration of the end tool is different in features, for example, the shape of the jaw is different, and there is additionally a cover and an intermediate tube, etc. As described above, the configuration different from the first embodiment will be described in detail later.

[0448] Fig.23 is a perspective view showing an instrument for electrocautery surgery according to a sixth embodiment of the present invention, Fig.24 yes Fig.23 A side view of an instrument for electrocautery surgery. Figure 25 to Figure 27 It is shown Fig.23 A perspective view of the end tool of an electrocautery surgical instrument. Fig.28 It is shown Fig.26 The exploded perspective view of the end tool center, pitch center, intermediate tube and axis shown in Fig.29 It is shown Fig.26 An enlarged perspective view of the center of the end tool of an electrocautery surgical instrument. Fig.30 It is shown Fig.26 An enlarged perspective view of an intermediate tube of an electrocautery surgical instrument.

[0449] First, see Fig.23 and Fig.24The electrocautery surgical instrument 60 according to the sixth embodiment of the present invention includes an end tool 1100 , an operating portion 1200 , a power transmission portion (not shown), and a connecting portion 1400 .

[0450] The connection portion 1400 has a straight portion 1401 and a curved portion 1402, and includes a connector 1410. The operation portion 1200 includes a first handle 1204, an actuation operation portion 1203, a yaw operation portion 1202, and a pitch operation portion 1201.

[0451] In this embodiment, the respective configurations of the connection portion 1400 and the operation portion 1200 are similar to those of the first embodiment. Figure 2 The connection portion 400 and the operation portion 200 described in the drawings are substantially the same, and therefore, a detailed description thereof will be omitted here.

[0452] Fig.25 is a perspective view showing an end tool 1100 having a cover 1190, Fig.26 It is shown from Fig.25 A perspective view of a state in which the end tool 1100 removes the cover 1190, Fig. 27 It is shown from Fig.26 A perspective view of a state where the end tool 1100 is removed with the end tool center 1180 and the pitch center 1170.

[0453] See also Figure 25 to Figure 27 The end tool 1100 of the electrocautery surgical instrument 60 according to the sixth embodiment of the present invention has a pair of jaws, namely a first jaw 1101 and a second jaw 1102. Here, the first jaw 1101 and the second jaw 1102, or a component including the first jaw 1101 and the second jaw 1102, may be referred to as a jaw 1103. The first jaw 1101 and the second jaw 1102 will be described in detail later.

[0454] On the other hand, the end tool 1100 may include pulleys 1111, 1113, 1114, 1115, and 1116 associated with the rotational movement of the first jaw 1101. In addition, pulleys 1121, 1123, 1124, 1125, and 1126 associated with the rotational movement of the second jaw 1102 may be included. In this embodiment, the pulleys associated with the rotational movement of the first jaw and the pulleys associated with the rotational movement of the second jaw are similar to those of the first embodiment. Figure 5 The pulleys 111, 113, 114, 115, 116, 121, 123, 124, 125 and 126 described in the drawings are substantially the same, and therefore, a detailed description thereof will be omitted here.

[0455] In addition, the end tool 1100 may include an end tool center 1180, a pitch center 1170, and an intermediary tube 1160. These configurations may be sequentially coupled in a direction from a distal end 1104 to a proximal end 1105 of the end tool, and the intermediary tube 1160 may be coupled to the axis of the straight portion 1401 as the connection portion 1400. Here, the cover 1190 and the intermediary tube 1160 will be described in detail later.

[0456] On the other hand, although not shown in the drawings, the electrocautery surgical instrument 60 according to the sixth embodiment of the present invention is Figure 2 and Fig.16 The electrocautery surgical instrument 10 according to the first embodiment of the present invention shown in FIG. 1 may further include a guide wire (see FIG. 1 ). Fig.16 301 in), shrink tube (see Fig.16 331) and shaft tube (see Fig.16 341 in). In addition, a feature of the surgical instrument 60 according to the sixth embodiment of the present invention is that due to the shrink tube (see Fig.16 331) in which a wire is inserted (see Fig.16 301 in), the shrink tube (see Fig.16 331) into the shaft tube (see Fig.16 341), therefore, the wire (see Fig.16 301 in) and shaft tube (see Fig.16 341) in the figure are not in direct contact and are insulated from each other.

[0457] In the end tool 1100 of the sixth embodiment of the present invention, the rotation axis 1141 is inserted through the end tool center 1180, the rotation axis 1143 and the rotation axis 1144 are inserted through the pitch center 1170, and the pitch center 1170 can be axially coupled with the end tool center 1180 and the pulley 1131 through the rotation axis 1143. Therefore, the end tool center 1180 and the pulley 1131 can be formed to be pitch-rotatable relative to the pitch center 1170 around the rotation axis 1143.

[0458] In this embodiment, the end tool center 1180, the pitch center 1170, and the rotation axes 1141, 1143, and 1144 are respectively the same as those in the first embodiment. Figure 4 The end tool center 180, the pitch center 107, and the rotation axes 141, 143, and 144 described in the drawings are substantially the same, and therefore, a detailed description thereof will be omitted here.

[0459] On the other hand, the end tool 1100 of the sixth embodiment of the present invention may further include an intermediate tube 1160. The intermediate tube 1160 may be formed of a material having insulation properties, for example, the intermediate tube 1160 may be made of polyetheretherketone (PEEK), phenolic resin, polycarbonate, and glass fiber reinforced plastic (GRP), and may be an intermediate tube 1160 in which ceramic is coated on plastic. It is combined with one end of the above-mentioned pitch center 1170 and may be combined with the straight portion 1401 of the connecting portion 1400. That is, the intermediate tube 1160 may be a member between the straight portion 1401 and the pitch center 1170.

[0460] In detail, the intermediary tube 1160 may be interposed between the pitch center 1170 as a conductor and the straight portion 1401 as a conductor, thereby being able to function as an insulating adapter, and may be used to fix the cover 1190 described later.

[0461] A more detailed description of this is as follows.

[0462] The intermediate tube 1160 may form one or more center coupling parts 1164 coupled with the pitch center 1170 at one end of the tube body 1161, and may form one or more shaft coupling parts 1165 coupled with the straight part 1401 of the connection part 1400 at the other end. In addition, the cover coupling part 1162 coupled with the cover 1190 may be formed in one area of ​​the tube body 1161. In detail, one end of the tube body 1161 is a part inserted into the inside of the pitch center 1170, so that it may have a diameter smaller than the center of the body, and the other end of the tube body 1161 is a part inserted into the inside of the straight part 1401 of the connection part 1400, so that it may have a diameter smaller than the center of the body. Here, the center coupling part 1164 may be formed in an area where one end of the tube body 1161 is inserted into the inside of the pitch center 1170. And, the shaft coupling part 1165 may be formed in an area where the other end of the tube body 1161 is inserted into the inside of the straight part 1401 of the connection part 1400.

[0463] Each of the above-mentioned joints may be in the shape of a protrusion protruding a certain portion from the tube body 1161, and a groove matching the shape of the center joint 1164 is formed on the pitch center 1170, and as each center joint 1164 is engaged with the groove, the pitch center 1170 can be fixedly joined with the intermediate tube 1160. Similarly, a groove matching the shape of the shaft joint 1165 is formed on the straight portion 1401, and as each shaft joint 1165 is engaged with the groove, the straight portion 1401 can be fixedly joined with the intermediate tube 1160.

[0464] In addition, the tube body 1161 of the intermediate tube 1160 may include one or more protrusions 1163 formed along the circumference of the tube body. The protrusions 1163 may be used to prevent the cover 1190 from sliding off the intermediate tube 1160. In detail, the protrusions 1163 may have a band shape such as a ring, and the protrusions 1163 may be provided in a substantially middle area of ​​the tube body 1161. In addition, the protrusions 1163 may be provided on the boundary surface between the pitch center 1170 and the tube body 1161 or on the boundary surface between the straight portion 1401 and the tube body 1161, but the spirit of the present invention is not limited thereto, and various shapes and numbers of protrusions 1163 may be implemented.

[0465] In addition, the tube body 1161 of the intermediary tube 1160 may include a cover coupling portion 1162 formed in one area of ​​the tube body. The cover coupling portion 1162 is coupled with a groove 1192 formed on the cover 1190 described later, so that the cover 1190 is fixedly coupled to the intermediary tube 1160, thereby preventing the two from being easily separated, and when the cover 1190 is inserted into the intermediary tube 1160, the cover coupling portion 1162 can be used to guide the position.

[0466] As described above, in order to prevent the cover 1190 from being separated and guide the position, the cover coupling part 1162 may be formed in plural, and the cover coupling part 1162 may be formed in a protrusion shape protruding from the tube body 1161 to a certain thickness. Fig.30 In the embodiment, cover coupling parts 1162 are respectively formed on the upper and lower surfaces of the intermediate tube 1160, but the spirit of the present invention is not limited thereto, and the shape and number of the cover coupling parts 1162 may be formed in various ways.

[0467] Hereinafter, the jaws of the end tool 1100 according to the sixth embodiment of the present invention will be described in detail. Here, the component including the first jaw 1101 and the second jaw 1102 may be referred to as a jaw 1103 .

[0468] Fig.31 It is shown Fig.26 An exploded perspective view of the jaw combination structure of an electrocautery surgical instrument, Fig.32 It is shown Fig.31 Plan view of the first jaw. Fig.33 It is shown Fig.31 A plan view of the second jaw, Fig.34a and Fig.34b It is shown Fig.31 A plan view of a combination of a first jaw and a second jaw.

[0469] See also Figure 31 to Figure 33The jaw 1103 of the end tool 1100 may be a structure disposed between jaw pulleys for combination. That is, the first jaw pulley 1111, the first jaw 1101, the second jaw 1102, and the second jaw pulley 1121 are sequentially stacked for combination and are combined with each other by inserting the rotation shaft 1141 through them.

[0470] Here, the first jaw 1101 may include a clamping portion 1101a, an extension portion 1101b, and a coupling portion 1101c, and the second jaw 1102 may include a clamping portion 1102a, an extension portion 1102b, and a coupling portion 1102c.

[0471] The clamping part 1101a and the clamping part 1102a are parts constituting the main body of the jaw 1103, which can form predetermined projections and depressions on one surface (inner surface). In the drawings, a dissector is shown as the clamping part, but in addition, various types of clamping parts such as forceps and needle holders can be provided.

[0472] The extension portion 1101b and the extension portion 1102b are portions extending from the clamp portion 1101a and the clamp portion 1102a in one direction (for example, in the -X axis direction which is the formation direction of the connection portion 1400), and may form a predetermined angle with the clamp portion 1101a and the clamp portion 1102a. Therefore, when the first jaw 1101 and the second jaw 1102 are combined through the axis passing through the combination portion 1101c and the combination portion 1102c, the extension portion 1101b of the first jaw and the extension portion 1102b of the second jaw may be combined in an intersecting manner. In other words, when the first jaw 1101 and the second jaw 1102 are closed, the extension portion 1101b of the first jaw 1101 and the extension portion 1102b of the second jaw 1102 may form an intersection 1103b intersecting in an X shape. Describing this from another perspective, it can be described that when the first jaw 1101 and the second jaw 1102 are closed, based on the surface (XZ plane) where the clamping portion 1101a and the clamping portion 1102a contact each other, the portion of the extension portion 1102b adjacent to the joint portion 1102c of the second jaw and the clamping portion 1101a of the first jaw are located on one side, and the portion of the extension portion 1101b adjacent to the joint portion 1101c of the first jaw and the clamping portion 1102a of the second jaw can be located on the other side. Describing this from another perspective, it can be described as follows. Fig.34bAs shown, with the surface (XZ plane) where the clamping portion 1101a and the clamping portion 1102a contact each other as the standard, the clamping portion 1101a of the first jaw is located on one side, and at least a portion of the extension portion 1101b adjacent to the coupling portion 1101c of the first jaw can be located on the other side. Similarly, the clamping portion 1102a of the second jaw is located on one side, and at least a portion of the extension portion 1102b adjacent to the coupling portion 1102c of the second jaw is located on the other side.

[0473] On the other hand, the coupling parts 1101c and 1102c are formed in a flat plane shape at one end of the extension parts 1101b and 1102b, and are coupled with the jaw pulleys 1111 and 1121. In addition, the coupling parts 1101c and 1102c may include shaft coupling holes 1101d and 1102d, movable coupling holes 1101f and 1102f, and jaw pulley coupling holes 1101g and 1102g described later.

[0474] In the following, each configuration is described based on the first jaw 1101.

[0475] Here, the movable coupling hole 1101f is formed to have a predetermined curvature and can be roughly formed into an ellipse. The shaft coupling portion 1111a of the pulley 1111 described later can be inserted into the movable coupling hole 1101f. Here, the short radius of the movable coupling hole 1101f can be formed to be substantially equal to or slightly larger than the radius of the shaft coupling portion 1111a. On the other hand, the long radius of the movable coupling hole 1101f can be formed to be larger than the radius of the shaft coupling portion 1111a. Therefore, in a state where the shaft coupling portion 1111a of the pulley 1111 is inserted into the movable coupling hole 1101f of the first jaw 1101, the shaft coupling portion 1111a is formed to be movable to a certain extent inside the movable coupling hole 1101f.

[0476] On the other hand, the jaw pulley coupling hole 1101g is formed in a cylindrical hole shape, into which the jaw coupling portion 1111b of the pulley 1111 described later can be inserted. Here, the radius of the jaw pulley coupling hole 1101g can be formed to be substantially equal to or slightly larger than the radius of the jaw coupling portion 1111b. Therefore, the jaw coupling portion 1111b of the pulley 1111 can be formed to be rotatably coupled to the jaw pulley coupling hole 1101g of the first jaw 1101.

[0477] Compared with the movable coupling hole 1101f and the jaw pulley coupling hole 1101g, the shaft coupling hole 1101d can be relatively formed at the distal end of the first jaw 1101, that is, the extension part 1101b side. The shaft coupling hole 1101d is formed in a hole shape, and the rotating shaft 1145 as the jaw rotating shaft can be inserted through the shaft coupling hole 1101d.

[0478] The pulley 1111 as the first jaw pulley may include an axis coupling portion 1111a and a jaw coupling portion 1111b. The pulley 1111 is formed as a rotatable disc shape as a whole, and the axis coupling portion 1111a and the jaw coupling portion 1111b may be formed to protrude to a certain extent on one surface of the pulley 1111. As described above, the axis coupling portion 1111a of the pulley 1111 may be inserted into the movable coupling hole 1101f of the first jaw 1101, and the jaw coupling portion 1111b of the pulley 1111 may be inserted into the jaw pulley coupling hole 1101g of the first jaw 1101. The pulley 1111 may be formed to be rotatable around a rotation axis 1141 as a rotation axis of the end tool jaw pulley.

[0479] Similarly, the axial coupling hole 1102d, movable coupling hole 1102f and jaw pulley coupling hole 1102g of the coupling portion 1102c of the second jaw 1102 are substantially the same as the corresponding configurations of the axial coupling hole 1101d, movable coupling hole 1101f and jaw pulley coupling hole 1101g of the coupling portion 1101c of the first jaw, and therefore, a detailed description thereof is omitted.

[0480] The pulley 1121 serving as the second jaw pulley also includes a shaft coupling portion (not shown) and a jaw coupling portion (not shown), and is substantially the same as the first jaw pulley 1111 within a range corresponding to the first jaw pulley 1111, and therefore, a detailed description thereof is omitted.

[0481] Hereinafter, description will be made with respect to the increase in grip force due to the coupling relationship between the above-mentioned constituent elements.

[0482] A feature of the surgical instrument 60 according to an embodiment of the present invention is that the combination structure of the first jaw 1101 and the second jaw 1102 is formed into an X-shaped structure, so that when the first jaw 1101 and the second jaw 1102 rotate in a direction approaching each other (i.e., when the first jaw 1101 and the second jaw 1102 are closed), the gripping force in the direction of closing the first jaw 1101 and the second jaw 1102 is further increased. A more detailed description of this is as follows.

[0483] As described above, in the action of opening and closing the first jaw 1101 and the second jaw 1102, there are two axes that serve as the rotation center. That is, the first jaw 1101 and the second jaw 1102 perform the opening and closing action around the two axes of the rotation axis 1141 and the rotation axis 1145. At this time, the rotation axis 1145 becomes the rotation center of the first jaw 1101 and the second jaw 1102, and the rotation axis 1141 becomes the rotation center of the pulley 1111 and the pulley 1121. At this time, the rotation axis 1141 becomes an axis whose position is relatively fixed, and the rotation axis 1145 becomes an axis whose position moves linearly relatively. In other words, in a state where the position of the rotation axis 1141 is fixed, when the pulley 1111 and the pulley 1121 rotate, the rotation axis 1145, which is the rotation axis of the first jaw 1101 and the second jaw 1102, moves back and forth, and the first jaw 1101 and the second jaw 1102 are opened / closed.

[0484] That is, assuming that the position of the rotation axis 1141 serving as the rotation axis of the end tool jaw pulley is fixed, at this time, if the first jaw 1101 and the second jaw 1102 are closed, the rotation axis 1145 serving as the jaw rotation axis is subjected to force in the direction of forward movement (i.e., the distal end direction), and therefore, the gripping force in the direction of closing (closing) the first jaw 1101 and the second jaw 1102 is further increased.

[0485] On the contrary, when the first jaw 1101 and the second jaw 1102 rotate in an opening direction, the rotation shaft 1145 moves rearward in a proximal direction.

[0486] Fig.35a and Fig.35b 1 is a diagram showing a jaw of a conventional electrocautery surgical instrument. Fig.36a and Fig.36b It is shown Fig.23 Diagram of the jaws of an instrument used for electrocautery surgery.

[0487] See also Fig.35a and Fig.35b The jaw C103 of the existing end tool rotates in the direction in which the first jaw C101 and the second jaw C102 open, that is, when each jaw opens, it directly contacts the entrance 190a of the cover 190.

[0488] Therefore, the neck of the jaw C103 repeatedly contacts and stretches the cover 190, causing the cover 190 to be torn or deformed, or the cover 190 is pushed back and the insulation is damaged. Therefore, the opening angle of the jaw C103 is limited, thereby limiting the opening action of the jaw.

[0489] On the contrary, see again Fig.34bIn the sixth embodiment of the present invention, the jaws 1103 of the end tool 1100 are formed into an X-shaped structure, and the jaw rotation axis 1145 that is inserted through the first jaw 1101 and the second jaw 1102 and becomes the rotation center of the first jaw 1101 and the second jaw 1102, when the first jaw 1101 and the second jaw 1102 are closed, the extension portion 1101b of the first jaw 1101 and the extension portion 1102b of the second jaw 1102 include an intersection 1103b that intersects in an X-shape, and the intersection 1103b is formed to be separated from the jaw rotation axis 1145.

[0490] In addition, see Fig.36a and Fig.36b , the cover 1190 may be arranged so that the entrance portion 1190a is adjacent to the intersection 1103b where the extension 1101b of the first jaw and the extension 1102b of the second jaw intersect. Therefore, even if the first jaw 1101 and the second jaw 1102 rotate in the opening direction, the first jaw 1101 and the second jaw 1102 may not directly contact the cover 1190. That is, even if the jaw 1103 is opened, no force is applied to expand the entrance of the cover 1190, and damage such as deformation or tearing of the cover 1190 caused by repeated opening and closing actions of the jaw 1103 can be prevented. In addition, even if the jaw 1103 is opened, the cover 1190 is not pushed back, so that the effect of stably maintaining insulation can be obtained.

[0491] In other words, the jaws 1103 are formed into an X-shaped structure, and the entrance portion 1190a of the cover 1190 is located at the intersection 1103b of the jaws which serves as the X-shaped neck of the jaws 1103, so that the restriction on the opening and closing angles of the jaws 1103 is reduced, preventing the jaws 1103 from contacting the cover 1190, thereby preventing deformation of the cover 1190 and damage to the insulation.

[0492] Hereinafter, the cover 1190 of the end tool 1100 according to the sixth embodiment of the present invention will be described in detail.

[0493] Fig.37a It is shown Fig.23 A plan view of a cover for an electrocautery surgical instrument. Figure 37b is a side view showing the cover. Fig.38a It is shown Fig.23 A plan view of an end tool of an electrocautery surgical instrument and a cover covering the end tool, Figure 38b is a side view of the end tool.

[0494] The cover 1190 is a cover that wraps the main part of the end tool 1100 including the above-mentioned intermediate tube 1160. Specifically, the cover 1190 can be said to be a cover covering a certain area from the intermediate tube 1160 to the pitch center 1170, the end tool center 1180 and the jaw 1103. The cover 1190 can be formed of an insulating material. For example, the cover 1190 can be formed of silicone rubber, chloroprene rubber, polytetrafluoroethylene (PTFE), polyurethane, epoxy resin, etc.

[0495] See also Fig.37a and Figure 37b , the cover 1190 includes a fold 1191 and a groove 1192 located on the body. The fold 1191 may be formed in a certain area of ​​the cover 1190 where the pitching action of the end tool 1100 occurs. That is, the fold 1191 may be partially formed in a direction parallel to the rotation axis on the surface opposite to the rotation axis of the pitch center 1170 where the pitching action occurs. In detail, the pitch center 1170 includes a third pin 1143 used as an end tool pitch rotation axis in conjunction with the end tool center 1180 axis and a fourth pin 1144 used as an end tool pitch auxiliary rotation axis, and the fourth pin 1144 is formed to be parallel to the third pin 1143 and formed on one side of the third pin 1143. At this time, the fold 1191 of the cover 1190 may be formed in an area relatively closer to the fourth pin 1144 than the third pin 1143. In other words, it can be said that the fold 1191 of the cover 1190 can be formed to be closer to the side of the fourth pin 1144 than the third pin 1143. Therefore, when the fold 1191 is unfolded while the cover 1190 is pulled during the pitching action of the end tool 1100, the fold 1191 can be located on the third pin 1143 which is the end tool pitch rotation axis.

[0496] On the other hand, the groove 1192 of the cover 1190 is formed at a position corresponding to the cover coupling part 1162 of the above-mentioned intermediary tube 1160, and can be coupled with the cover coupling part 1162. In other words, it can be said that the cover coupling part 1162 protruding from the intermediary tube 1160 is inserted into the groove 1192 of the cover 1190.

[0497] In addition, the diameter of the proximal end portion side end portion 1190b of the cover 1190 may be formed to be inclined while becoming smaller as it approaches the proximal end portion.

[0498] Thus, it is possible to prevent a step from occurring at the boundary between the cover 1190 and the straight portion 1401 .

[0499] In addition, if Fig.37a As shown in , the diameter of the body of the cover 1190 can be slightly smaller than the diameter of the intermediate tube 1160.

[0500] Thus, the cover 1190 may be coupled to the intermediate tube 1160 by interference fit, thereby preventing the cover 1190 from falling off from the end tool 1100 .

[0501] Hereinafter, a method according to a sixth embodiment of the present invention will be described. Fig.23 Intuitively driven movements of electrocautery surgical instruments.

[0502] The intuitive driving of the present invention has been described in detail through the first embodiment, and since the present embodiment is also substantially the same, the detailed description will be omitted.

[0503] Fig.39 and Fig.40 It is shown Fig.23 A perspective view of the yaw action of an instrument used in electrocautery surgery, Fig.41 and Fig.42 It is shown Fig.23 A perspective view of the pitching action of an instrument used in electrocautery surgery. Fig.43 yes Fig.23 A perspective view of the yaw-pitch motion of an instrument used in electrocautery surgery.

[0504] Here, Fig.39 1 is a diagram showing the state where each jaw is yaw rotated by +90°. Fig.40 The diagram shows a state where each jaw is yaw-rotated by -90°.

[0505] See also Figure 39 to Figure 40 , it can be seen that when performing a yaw action, the actions of the operating unit 1200 and the end tool 1100 are intuitively consistent. That is, when the operating unit 1200 rotates in the + direction with the yaw rotation axis (Z axis) as the alignment, the end tool 1100 also rotates in the + direction with the yaw rotation axis (Z axis) as the alignment. In addition, when the operating unit 1200 rotates in the - direction with the yaw rotation axis (Z axis) as the alignment, the end tool 1100 also rotates in the - direction with the yaw rotation axis (Z axis) as the alignment. Here, the rotation angle of the operating unit 1200 and the rotation angle of the end tool 1100 can be set in various ways according to the ratio of the pulleys.

[0506] Fig.41 1 is a diagram showing the state where each jaw is pitched and rotated by +90°. Fig.42 The figure shows a state where each jaw is pitched and rotated by -90 degrees.

[0507] See also Figure 41 to Figure 42, it can be seen that when performing a pitch action, the actions of the operating unit 1200 and the end tool 1100 are intuitively consistent. That is, when the operating unit 1200 rotates in the + direction with the pitch rotation axis (Y axis) as the alignment, the end tool 1100 also rotates in the + direction with the pitch rotation axis (Y axis) as the alignment. In addition, when the operating unit 1200 rotates in the - direction with the pitch rotation axis (Y axis) as the alignment, the end tool 1100 also rotates in the - direction with the pitch rotation axis (Y axis) as the alignment. Here, the rotation angle of the operating unit 1200 and the rotation angle of the end tool 1100 can be set in various ways according to the ratio of the pulleys.

[0508] Fig.43 The figure shows a state where each jaw is rotated by +90° in pitch and -90° in yaw.

[0509] See also Fig.43 It can be seen that when the pitch action and the yaw action are performed simultaneously, the actions of the operating unit 1200 and the end tool 1100 are also intuitively consistent.

[0510] Here, it can be further explained that intuitively the same direction means that the moving direction of the user's finger gripping the operating unit 1200 and the moving direction of the end portion of the end tool 1100 are substantially the same direction. Of course, the same direction here does not mean a direction that is perfectly consistent with the three-dimensional coordinates, but, for example, when the user's finger moves to the left, the end portion of the end tool 1100 also moves to the left, and when the user's finger moves downward, the end portion of the end tool 1100 also moves downward.

[0511] <Seventh Embodiment> (Monopolar Scissor)

[0512] Hereinafter, the end tool 2100 of the electrocautery surgical instrument 70 according to the seventh embodiment of the present invention will be described. Here, the end tool 2100 of the electrocautery surgical instrument according to the seventh embodiment of the present invention is different from the end tool of the surgical instrument according to the sixth embodiment of the present invention (see Fig.23 Compared with 1100 in the embodiment, the shape of the jaw is different. As described above, the configuration different from the sixth embodiment will be described in detail later.

[0513] Fig.44 is a perspective view showing an instrument for electrocautery surgery according to a seventh embodiment of the present invention, Fig.45 It is shown Fig.44 Side view of an instrument used for electrocautery surgery. Fig.46 and Fig.47 It is shown Fig.44 A perspective view of a distal end tool of an instrument for electrocautery surgery.

[0514] First, see Fig.44 and Fig.45 The electrocautery surgical instrument 70 according to the seventh embodiment of the present invention includes an end tool 2100 , an operating portion 2200 , a power transmission portion (not shown), and a connecting portion 2400 .

[0515] The connection portion 2400 has a straight portion 2401 and a curved portion 2402, and includes a connector 2410. The operation portion 2200 includes a first handle 2204, an actuation operation portion 2203, a yaw operation portion 2202, and a pitch operation portion 2201.

[0516] In this embodiment, the configurations of the connection portion 2400 and the operation portion 2200 are similar to those of the first embodiment. Figure 2 The connection portion 400 and the operation portion 200 described in the drawings are substantially the same, and therefore, a detailed description thereof will be omitted here.

[0517] Fig.46 is a perspective view showing an end tool 2100 having a cover 2190, Fig.47 21 is a perspective view showing a state in which the cover 2190 is removed from the end tool 2100 .

[0518] See also Figure 46 to Figure 47 The end tool 2100 of the electrocautery surgical instrument 70 according to the seventh embodiment of the present invention has a pair of jaws, namely a first jaw 2101 and a second jaw 2102. Here, the first jaw 2101 and the second jaw 2102, or a component including the first jaw 2101 and the second jaw 2102, may be referred to as a jaw 2103. The first jaw 2101 and the second jaw 2102 will be described in detail later.

[0519] In addition, the end tool 2100 may include an end tool center 2180, a pitch center 2170, and an intermediate tube 2160. They may be configured to be sequentially coupled in a direction from a distal end 2104 to a proximal end 2105 of the end tool, and the intermediate tube 2160 may be coupled to the axis of the straight portion 2401 as the connecting portion 2400.

[0520] In the end tool 2100 of this embodiment, the rotation axis 2141 is inserted through the end tool center 2180 , and the rotation axis 2143 and the rotation axis 2144 may be inserted through the pitch center 2170 .

[0521] In this embodiment, the end tool center 2180, the pitch center 2170, and the rotation axes 2141, 2143, and 2144 are respectively the same as those in the first embodiment. Figure 4The end tool center 180, the pitch center 107, and the rotation axes 141, 143, and 144 described in the drawings are substantially the same, and therefore, a detailed description thereof will be omitted here.

[0522] In addition, the intermediate tube 2160 and the cover 2190 of this embodiment are different from those of the sixth embodiment. Fig.30 The intermediate tube 1160 and the cover 1190 described in the embodiments of the present invention are substantially the same, and therefore, a detailed description thereof will be omitted here.

[0523] On the other hand, although not shown in the drawings, the electrocautery surgical instrument 70 according to the seventh embodiment of the present invention is Figure 2 and Fig.16 The electrocautery surgical instrument 10 according to the first embodiment of the present invention shown in FIG. 1 may further include a guide wire (see FIG. 1 ). Fig.16 301 in), shrink tube (see Fig.16 331) and shaft tube (see Fig.16 341 in). In addition, a feature of the surgical instrument 70 according to the seventh embodiment of the present invention is that due to the shrinkage tube (see Fig.16 331) in which a wire is inserted (see Fig.16 301 in), the shrink tube (see Fig.16 331) into the shaft tube (see Fig.16 341), therefore, the wire (see Fig.16 301 in) and shaft tube (see Fig.16 341) in the figure are not in direct contact and are insulated from each other.

[0524] Hereinafter, the jaws of the end tool 2100 according to the seventh embodiment of the present invention will be described in detail. Here, the component including the first jaw 2101 and the second jaw 2102 may be referred to as a jaw 2103 .

[0525] although Fig.47 Although not shown in the figure, the jaw according to the present embodiment includes a coupling portion as described in the sixth embodiment, and the coupling portion is coupled with the jaw pulley 2111 and the jaw pulley 2121. In addition, the coupling portion may include a shaft coupling hole, a movable coupling hole, and a jaw pulley coupling hole.

[0526] The shaft coupling part of the pulley can be inserted into the shaft coupling part, and the jaw coupling part of the pulley can be inserted into the jaw pulley coupling hole. The rotating shaft 2141 as the jaw pulley rotating shaft is inserted through the movable coupling hole, and the rotating shaft 2145 as the jaw rotating shaft is inserted through the shaft coupling hole.

[0527] Here, the jaw pulley 2111, the jaw pulley 2121, the coupling portion, the shaft coupling hole, the movable coupling hole and the jaw pulley coupling hole, and the rotating shaft 2141 and the rotating shaft 2145 of the present embodiment are the same as those of the sixth embodiment. Fig.31 The jaw pulley 1111, jaw pulley 1121, joint 1101c and joint 1102c, shaft joint hole 1101d and shaft joint hole 1102d, movable joint hole 1101f and movable joint hole 1102f, jaw pulley joint hole 1101g and jaw pulley joint hole 1102g and rotating shaft 1141 and rotating shaft 1145 described in the above are substantially the same, and therefore, a detailed description thereof will be omitted here.

[0528] Compared with the other end tool 1100 according to the sixth embodiment of the present invention, the end tool 2100 according to the seventh embodiment of the present invention is different in features in terms of the shape of the jaws 2103 .

[0529] The jaws 2103 of the end tool 2100 according to the seventh embodiment of the present invention are jaws used as scissors, which are used to cut objects rather than clamp objects. Therefore, in a state where the jaws 2103 are closed, the first jaw 2101 and the second jaw 2102 can overlap each other, and the inner surfaces of the jaws are formed with sharp blades.

[0530] According to the present invention as described above, it is possible to obtain an effect of improving the insulation performance of an instrument for electrocautery surgery.

[0531] As described above, the present invention is described with reference to an embodiment shown in the accompanying drawings, but this is only exemplary, and those skilled in the art should understand that various modifications and variations of the embodiments can be made therefrom. Therefore, the true technical protection scope of the present invention should be determined according to the technical ideas of the claims.

[0532] Explanation of symbols

[0533] 10: Surgical instruments

[0534] 100: end tool

[0535] 200: Operation Department

[0536] 300: Power transmission unit

[0537] 400: Connection

Claims

1. An instrument for electrocautery surgery, characterized in that: include: a tip tool including one or more jaws and formed to be rotatable in two or more directions; A connecting portion extending along a first direction (X axis) and having the end tool coupled to one end thereof; A wire, one end of which is connected to the end tool; a shrink tube into which the other end of the wire opposite to the end connected to the end tool is inserted; and an axial tube, wherein the other end of the shrinkable tube opposite to the end into which the wire is inserted is inserted in, The conductive wire is separated from the shaft tube by the shrink tube, so that the conductive wire and the shaft tube are insulated from each other.

2. The electrocautery surgical instrument according to claim 1, characterized in that: The other end of the wire is not exposed outside the other end of the shrink tube.

3. The electrocautery surgical instrument according to claim 1, characterized in that: The overlapping area of ​​the wire, the shrink tube, and the shaft tube is crimped.

4. The electrocautery surgical instrument according to claim 1, characterized in that: When the wire is inserted into the shrink tube, the shrink tube is heated and shrunk, so that the shrink tube and the wire are closely combined.

5. The electrocautery surgical instrument according to claim 1, characterized in that: An operating portion is further included, which controls the rotation of the end tool in the two or more directions, wherein the operating portion is coupled to the other end portion of the connecting portion.

6. The electrocautery surgical instrument according to claim 5, characterized in that: The shaft tube connects the lead wire on the end tool side and the lead wire on the operation portion side.

7. The electrocautery surgical instrument according to claim 1, characterized in that: The shaft tube is arranged in the connecting portion.

8. The electrocautery surgical instrument according to claim 1, characterized in that: The wire is not in direct contact with the shaft tube.

9. The electrocautery surgical instrument according to claim 1, characterized in that: The guide wires, the shrinkable tubes, and the shaft tubes each include a plurality of guide wires and a plurality of shaft tubes, and the guide wires and the shaft tubes are formed so as not to directly face each other in any operating state.

10. The electrocautery surgical instrument according to claim 1, characterized in that: Further included is an electric wire connected to the jaws to provide electrical energy to the jaws, wherein when electrical energy flows in the electric wire through the shrink tube, a voltage induced in the shaft tube is prevented from being transmitted to the wire.

11. The electrocautery surgical instrument according to claim 1, characterized in that: The entirety of the wire is formed within the shrink tube.

12. The electrocautery surgical instrument according to claim 1, characterized in that: The end tool comprises: an end tool center rotatably coupled to an end tool jaw pulley coupled to the jaw; and a pitch center coupled to the end tool center axis via a rotation axis coupled to one end of the end tool center, Wherein, the end tool center and the pitch center include insulators.

13. The electrocautery surgical instrument according to claim 12, characterized in that: All surfaces of the end tool center and the pitch center are formed of insulating material.

14. The electrocautery surgical instrument according to claim 1, characterized in that: The end tool comprises: an end tool center rotatably coupled to an end tool jaw pulley coupled to the jaw; a pitch pulley having an axis coupled to a pitch rotation axis formed at one end of the center of the end tool; a pitch wire wound around the pitch pulley; and a fastener coupled to the pitch wire to couple the pitch pulley with the pitch wire, The end tool center is separated from the fastener by the pitch pulley, so that the end tool center and the fastener are insulated from each other.

15. The electrocautery surgical instrument according to claim 14, wherein: The pitch wire is formed as a single wire, and the fastener is fastened to a portion of the pitch wire.

16. The electrocautery surgical instrument according to claim 14, characterized in that: The pitch pulley includes an insulator.

17. The electrocautery surgical instrument according to claim 14, wherein: The pitch pulley includes at least one or more coupling parts for fixing the pitch pulley to the center of the end tool.

18. The electrocautery surgical instrument according to claim 14, characterized in that: The fastener does not directly contact the end tool center.

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