Laparoscopic cutting and bendable bipolar electrocoagulation forceps

Abstract

The present invention relates to the field of medical devices, and specifically to a bipolar electrocoagulation forceps that can be cut and bent under laparoscope, comprising a fixed handle, a movable handle, an outer tube, a forceps head and an electrical connector, wherein the outer tube is arranged on the fixed handle, the distal end of the outer tube passes through the fixed handle, and the forceps head is arranged through a bending assembly, a forceps head pusher is arranged in the outer tube, one end of the forceps head pusher is slidably connected with the forceps head and the bending assembly, and the other end extends out of the outer tube and is located in the fixed handle, the movable handle is rotationally connected with the fixed handle, and the movable handle is transmission-connected with the forceps head pusher; the forceps head and the forceps head pusher are electrically connected to the electrical connector, and the electrical connector is located outside the fixed handle and is used to connect to a high-frequency electrosurgical unit. The present invention has a reasonable structure, good electrocoagulation effect, safe use, and the position of the forceps head can be adjusted, which is more conducive to surgery.

Description

Technical Field

[0001] The invention relates to the field of medical equipment, and in particular to a bipolar electrocoagulation forceps that can be cut and bent under laparoscope. Background Art

[0002] During laparoscopic surgery, energy instruments are used to separate tissues, grasp, and coagulate blood vessel ends. Ultrasonic scalpels are commonly used now, but they have obvious disadvantages: ① The sealing effect on blood vessel ends is not as stable as instruments based on the principle of high-frequency bipolar electrocoagulation, which may cause secondary bleeding or bleeding after surgery; ② It can only seal blood vessels with a diameter of less than 1mm, resulting in the inevitable use of vascular clamps, which increases the cost of surgery for patients. ③ Thermal penetration damage to nerve tissue within a radius of 3mm at the tissue contact site is inevitable, which is prone to complications. High-frequency bipolar electrocoagulation forceps can provide a more stable electrocoagulation hemostasis effect and ensure absolute safety of peripheral nerve tissue in laparoscopic surgery, and reduce or even avoid the use of vascular clamps to reduce the cost burden of patients. For example, the disposable bipolar electrocoagulation forceps KJ-SJ0105 of Hangzhou Kangji Medical Instrument Co., Ltd. However, the current domestic bipolar electrocoagulation forceps for laparoscopic surgery do not have the function of electrocuting tissue, and can only stop bleeding by electrocoagulation forceps, so they cannot effectively replace the position of ultrasonic scalpels in laparoscopic surgery. This product is designed to overcome this weakness and allow the bipolar electrocoagulation forceps to have the function of effectively electrocuting tissue, thereby replacing the ultrasonic scalpel and bringing better surgical results and lower cost burden to patients undergoing laparoscopic surgery. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a bipolar electrocoagulation forceps which can be cut and bent under laparoscope, has reasonable structure, good electrocoagulation effect, is safe to use, and the position of the forceps head can be adjusted, which is more conducive to surgery.

[0004] In order to achieve the above object, the technical solution of the present invention is:

[0005] The bipolar electrocoagulation forceps capable of cutting and bending under laparoscope comprises a fixed handle, a movable handle, an outer tube, a forceps head and an electrical connector, wherein the outer tube is arranged on the fixed handle, the distal end of the outer tube passes through the fixed handle, and the forceps head is arranged through a bending assembly, a forceps head pusher is arranged in the outer tube, one end of the forceps head pusher is slidably connected with the forceps head and the bending assembly, and the other end extends out of the outer tube and is located in the fixed handle, the movable handle is rotatably connected with the fixed handle, and the movable handle is transmission-connected with the forceps head pusher;

[0006] The clamp head and the clamp head pusher are electrically connected to an electrical connector, which is located outside the fixed handle and is used to be connected to a high-frequency electric knife host.

[0007] Further, the pliers head comprises a second pliers and a first pliers hinged to the second pliers, the first pliers and the second pliers are respectively provided with a first slide groove and a second slide groove in the middle, the first pliers are provided with a plurality of convex teeth at the first slide groove, a ceramic insulating layer is fixedly provided on the second pliers, a conductive layer is provided on the ceramic insulating layer, the conductive layer is provided with grooves corresponding to the convex teeth, a metal wire is connected to the conductive layer, and an insulating isolation tube is sleeved on the metal wire;

[0008] The clamp head pusher comprises a metal sheet and an inner tube, one end of the metal sheet is located in the slide grooves of the first clamp and the second clamp, the metal sheet contacts the first clamp, the other end of the metal sheet is fixedly connected to the inner tube, the inner tube is connected to the electrical connector, one end of the inner tube is provided with an insulating layer, the insulating layer is provided with a through hole, the metal wire passes through the through hole of the inner tube and is connected to the electrical connector;

[0009] Push plates are arranged on both sides of one end of the metal sheet, and the two push plates are respectively located on the outsides of the two clamps. An insulating pad layer is arranged on the end surface of the first clamp facing the second clamp, and the height of the insulating pad layer is lower than the convex teeth.

[0010] Furthermore, guide grooves are provided on the outer sides of the first clamp and the second clamp, the two guide grooves are respectively connected to the first slide groove and the second slide groove, the two push pieces are respectively located in the two guide grooves, and the guide groove of the first clamp is provided with an arc-shaped recess at the end facing the outer tube.

[0011] Furthermore, the bending assembly includes a spring sheet, a pull rod and an elastic connecting member, the elastic connecting member includes a first elastic member and a second elastic member that are interlocked, the first elastic member and the second elastic member are both divided into a bending section and a fixed section, the middle of the bending section and the fixed section are both provided with a through slot, the through slot is used for the metal sheet to pass through, the metal wire is fixedly passed through the through slot of the first elastic member, a plurality of arc plates are arranged at intervals on both sides of the bending section, the inner side of the arc plate is fixedly connected to the spring sheet, the spring sheet passes through the fixed section to connect to the pull rod, and the fixed section is sleeved in the outer tube;

[0012] The pull rod is passed through the inner tube, and through grooves are provided on both sides of the other end of the inner tube. The pull rod is provided with guide plates corresponding to the through grooves, and the two guide plates are staggered. Limit blocks protruding from the inner tube are provided at both ends of the guide plates. A T-shaped push rod is also provided between the two pull rods, and a through hole is provided on the T-shaped push rod for the metal wire to pass through. The T-shaped push rod is inserted into the inner tube and contacts with the two pull rods on both sides respectively. A rotating drive assembly is sleeved on the limit block.

[0013] Furthermore, the rotation drive assembly includes a limit ring, a limit guide column, a receiving ring and a rotating handle. There are two limit rings, and the two limit rings are sleeved on the inner tube. The two limit rings correspond to the two guide plates respectively, and the limit ring is located between the two limit blocks of the guide plate. Two limit guide columns are passed through both sides of the limit ring, and the two limit guide columns are arranged along the axial direction of the limit ring. The limit guide column is rotatably connected to the fixed handle through a clamping piece. The outer ends of the two limit rings are opposite threaded sections, and the receiving rings are sleeved on the outer sides of the two limit rings. The receiving rings are threadedly connected to the two limit rings, and the rotating handle is arranged on the outer side of the receiving ring, and the rotating handle extends out of the fixed handle and is located on the outer side of the fixed handle.

[0014] Furthermore, the fixed handle is provided with a clamping groove for clamping the T-shaped push rod, and two electrode wire connectors are respectively provided on both sides of the clamping groove, one electrode wire connector is in contact with the inner tube, and the other electrode wire connector is in contact with the metal wire, and both electrode wire connectors are connected to the electrical connector.

[0015] Furthermore, a circuit switch is provided between the electrical connector and the two electrode wire connectors, and the circuit switch is provided at the front end of the movable handle.

[0016] Furthermore, the movable handle is provided with a shift fork at a hinged position with the fixed handle, the inner tube is located at a fork end of the shift fork, and retaining rings are provided on both sides of the inner tube corresponding to the shift fork.

[0017] Furthermore, the inner tube is provided with a limit shell at the positions corresponding to the two retaining rings, the limit shell is slidably connected to the fixed handle, a spring is arranged between one end of the limit shell and the fixed handle, an n-shaped stopper is arranged between the fixed handle and the other end of the limit shell, the transverse section of the n-shaped stopper is rotatably connected to the fixed handle, one end of the transverse section of the n-shaped stopper is provided with a rotation limit handle through the outside of the fixed handle, the vertical section of the n-shaped stopper faces the shift fork or the limit shell, a protrusion is arranged at the end of the vertical section of the n-shaped stopper, and grooves corresponding to the protrusions are provided on the fixed handle at both ends of the rotation path corresponding to the n-shaped stopper, and one of the grooves is located at the other end of the limit shell.

[0018] Furthermore, a curved display panel is arranged at the other end of the transverse section of the n-shaped stopper, two different colors are arranged on the curved display panel, and a display through hole is arranged at a position corresponding to the curved display panel on the fixed handle.

[0019] Through the above technical solution, the beneficial effects of the present invention are:

[0020] The present invention has good electrocoagulation effect: two electrode wire connectors are respectively connected to the inner tube and the metal wire, one of which charges the first clamp through the inner tube and the metal sheet to form an electrode, and the other charges the conductive layer on the second clamp through the metal wire to form another electrode. As the movable handle is rotated, the clamp head pusher is driven forward to close the two clamp heads, thereby forming a closed loop between the convex teeth on the first clamp head and the conductive layer, and electrocoagulation is performed on the tissue between the convex teeth and the conductive layer. The contact area between the convex teeth and the tissue is large, forming a strip-shaped electrocoagulation belt, and the electrocoagulation effect is good.

[0021] The present invention is convenient for cutting: the movable handle is rotated to make the shift fork push the retaining ring forward, thereby driving the inner tube and the metal sheet forward, so that the metal sheet slides in the slide groove of the clamp head, thereby achieving the purpose of cutting the electrocoagulated tissue; a push piece is provided on the metal sheet, and the end of the guide groove of the first clamp is provided with an arc-shaped depression. When the push piece passes through the arc-shaped depression, the first clamp is driven to close or open. The clamp head push piece is not only a connecting part of the circuit, but also a transmission part of the clamp head action, and also has the function of cutting tissue.

[0022] The connection between the pliers head and the handle of the present invention has a flexible section and is bendable. Through the arrangement of a bending assembly and a rotating drive assembly, rotating the rotating handle can drive the bending assembly to deflect and bend, so that a bendable part exists in the path between the pliers head and the handle, and the position of the pliers head can be adjusted. During the operation, there are fewer restrictions on the position of the handle, which is more conducive to the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the bipolar electrocoagulation forceps capable of cutting and bending under laparoscope of the present invention;

[0024] Figure 2 is a schematic structural diagram of a second clamp head of the present invention;

[0025] Figure 3 is a schematic cross-sectional structural diagram of a first clamp head of the present invention;

[0026] Figure 4 It is a schematic structural diagram of the clamp head and the bending assembly of the present invention;

[0027] Figure 5 is a schematic structural diagram of the elastic connector of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the pliers head pusher of the present invention;

[0029] Figure 7 It is a schematic diagram of the connection structure of the end of the inner tube of the present invention;

[0030] Figure 8 is a cross-sectional schematic diagram of the connection structure of the end portion of the inner tube of the present invention;

[0031] Fig. 9 It is a schematic structural diagram of a T-shaped push rod of the present invention;

[0032] Fig.10 It is a cross-sectional structural schematic diagram of the rotary handle and the receiving ring of the present invention;

[0033] Fig.11 It is a structural schematic diagram of the rotary drive assembly, the inner tube and the limit block of the present invention.

[0034] The numbers in the accompanying drawings are: 1 is a fixed handle, 2 is a movable handle, 201 is a fork, 3 is an outer tube, 4 is a clamp head, 401 is a first clamp, 4011 is a convex tooth, 4012 is an insulating cushion layer, 402 is a second clamp, 4021 is a ceramic insulating layer, 403 is a guide groove, 5 is a conductive layer, 501 is a metal wire, 502 is an insulating isolation tube, 6 is a clamp head pusher, 601 is a metal sheet, 6011 is a push sheet, 602 is an inner tube, 60 21 is a retaining ring, 11 is a bending assembly, 1101 is a spring, 1103 is a pull rod, 1104 is a T-shaped top rod, 1105 is an elastic connecting piece, 1106 is a feeler, 1107 is a limit block, 13 is an n-shaped stopper, 1301 is a protrusion, 1302 is an arc display panel, 15 is a spring, 18 is a rotation drive assembly, 1801 is a rotating handle, 1802 is a receiving ring, 1803 is a limit ring, and 1804 is a limit guide column. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0036] In the description of the present invention, it should be understood that the terms "left", "right", "up", "down", "horizontal", "vertical" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] like Figures 1 to 11As shown, this embodiment provides a laparoscopically cuttable and bendable bipolar electrocoagulation forceps, comprising a fixed handle 1, a movable handle 2, an outer tube 3, a forceps head 4 and an electrical connector, wherein the outer tube 3 is arranged on the fixed handle 1, the distal end of the outer tube 3 passes through the fixed handle 1, and the forceps head 4 is arranged through a bending component 11, a forceps head pusher 6 is arranged in the outer tube 3, one end of the forceps head pusher 6 is slidably connected with the forceps head 4 and the bending component 11, and the other end extends out of the outer tube 3 and is located in the fixed handle 1, the movable handle 2 is rotatably connected with the fixed handle 1, and the movable handle 2 is transmission-connected with the forceps head pusher 6; the forceps head 4 and the forceps head pusher 6 are electrically connected to the electrical connector, and the electrical connector is located outside the fixed handle 1 and is used to be connected to the high-frequency electrosurgical unit. After the electrocoagulation forceps is connected to the high-frequency electrosurgical unit and turned on, the forceps head pusher 6 and the forceps head 4 are respectively charged with monopolar electricity to form corresponding two poles. The movable handle 2 is rotated to drive the forceps head pusher 6 to move, so that the forceps head pusher 6 drives the forceps head 4 to clamp the tissue and electrocoagulate the tissue. When the position of the forceps head 4 needs to be adjusted, the position of the forceps head 4 is adjusted by bending the bending assembly 11.

[0038] Specifically, the clamp head 4 includes a second clamp 402 and a first clamp 401 hinged to the second clamp 402, a first slide groove and a second slide groove are respectively provided in the middle of the first clamp 401 and the second clamp 402, the width of the second slide groove is greater than the width of the first slide groove, the first clamp 401 is provided with a plurality of convex teeth 4011 at the first slide groove, a ceramic insulating layer 4021 is fixedly provided on the second clamp 402, a conductive layer 5 is provided on the ceramic insulating layer 4021, the conductive layer 5 is provided with grooves corresponding to the convex teeth 4011, the conductive layer 5 is connected to the metal wire 501, and the metal wire 501 is sleeved with an insulating isolation tube 502;

[0039] The clamp head pusher 6 includes a metal sheet 601 and an inner tube 602. One end of the metal sheet 601 is located in the slide grooves of the first clamp 401 and the second clamp 402. The part of the metal sheet 601 located in the first slide groove contacts the first clamp 401, so that the first clamp 401 is charged to form a positive or negative electrode. The other end of the metal sheet 601 is fixedly connected to the inner tube 602. The inner tube 602 is located in the outer tube 2, and the inner tube 602 is connected to the electrical connector. The left end of the inner tube 602 is provided with an insulating layer, and a through hole is opened on the insulating layer. The metal wire 501 passes through the inner tube 602. The through hole is connected to the electrical connector, the metal wire 501 is partially sleeved with the insulating isolation tube 502 on the inner tube 602, and the metal wire 501 and the inner tube 602 are isolated from the current by the insulating layer on the inner tube 602 and the insulating isolation tube 502, so that the electrodes form negative / positive electrodes on the conductive layer 5 along the electrical connector and the metal wire 502, so that the heads of the electrocoagulation forceps, that is, the conductive layers 5 on the first forceps head 401 and the second forceps head 402 are respectively charged to form electrodes, and a current loop is formed by closing the two forceps heads, so as to achieve electrocoagulation of the tissue between the two forceps heads;

[0040] Pushing pieces 6011 are provided on both sides of one end of the metal sheet 601. The two pushing pieces 6011 are respectively located on the outsides of the two clamps. An insulating pad layer 4012 is provided on the end surface of the first clamp 401 facing the second clamp 402. The height of the insulating pad layer 4012 is lower than the convex teeth 4011. Therefore, when the two clamp heads are closed, the current only passes through the convex teeth 4011 and the conductive layer 5 to form a current loop to electrocoagulate the tissue. The push piece 6011 is driven to push the two clamp heads through the movement of the clamp head pusher 6, so that the two clamp heads are closed.

[0041] The outer sides of the first clamp 401 and the second clamp 402 are both provided with guide grooves 403, the two guide grooves 403 are respectively connected with the first slide groove and the second slide groove, the two push pieces 6011 are respectively located in the two guide grooves 403, and the guide groove 403 of the first clamp 401 is provided with an arc-shaped depression at the end facing the outer tube 3. The push piece 6011 moves along the guide groove 403, and when the push piece passes through the arc-shaped depression at the end of the guide groove 403, the first clamp head 401 is opened or closed.

[0042] Furthermore, the bending assembly 11 includes a spring piece 1101, a pull rod 1103 and an elastic connector 1105. The elastic connector 1105 includes a first elastic piece and a second elastic piece that are interlocked, and the first elastic piece and the second elastic piece are divided into a bending section and a fixed section. A through groove is provided in the middle of the bending section and the fixed section, and the through groove is used for the metal sheet 601 to pass through. The metal wire 501 is fixedly passed through the through groove of the first elastic piece. A plurality of arc plates are arranged at intervals on both sides of the bending section, and the inner side of the arc plate is fixedly connected to the spring piece 1101. A connecting contact angle 1106 is arranged on the arc plate of the first elastic piece, and the connecting contact angle 1106 is columnar. A groove is arranged on the arc plate of the second elastic piece corresponding to the connecting contact angle. The two elastic pieces are connected by snapping the connecting contact angle 1106 and the groove. The spring piece 1101 passes through the fixed section to connect the pull rod 1103, and the fixed section is sleeved in the outer tube 3.

[0043] The pull rod 1103 is passed through the inner tube 602, and a through slot is provided at the right end of the inner tube 602. A guide plate is provided on the pull rod 1103 corresponding to the through slot, and the two guide plates are staggered. Stop blocks 1107 protruding from the inner tube 602 are provided at both ends of the guide plate. A T-shaped push rod 1104 is also provided between the two pull rods 1103. A through hole is provided on the T-shaped push rod 1104 for the metal wire 501 to pass through. The T-shaped push rod 1104 is inserted into the inner tube 602, and the two sides are respectively in contact with the two pull rods 1103. The T-shaped push rod 1104 is made of non-conductive material, such as plastic, and a rotation drive assembly 18 is sleeved on the stop block 1107. The pull rod 1103 is pulled by the rotation drive assembly 18, thereby driving the spring sheet 1101 to bend and tighten, and then driving the elastic connector 1105 to bend, so as to adjust the position of the clamp head 4.

[0044] Furthermore, the rotation drive assembly 18 includes a limit ring 1803, a limit guide post 1804, a receiving ring 1802 and a rotating handle 1801. The limit rings 1803 are two, and the two limit rings 1803 are sleeved on the inner tube 602. The two limit rings 1803 correspond to the two guide plates respectively. The limit ring 1803 is located between the two limit blocks 1107 of the guide plate. The two sides of the limit ring 1803 are penetrated by two limit guide posts 1804. The two limit guide posts 1804 are inserted into the inner tube 602. The column 1804 is arranged along the axial direction of the limiting ring 1803, and the limiting guide column 1804 is rotatably connected to the fixed handle through a clamping piece. The outer ends of the two limiting rings 1803 are opposite threaded sections. The receiving ring 1802 is sleeved on the outer side of the two limiting rings 1803, and the receiving ring 1802 is threadedly connected to the two limiting rings 1803. The rotating handle 1801 is arranged on the outer side of the receiving ring 1802, and the rotating handle 1801 extends out of the fixed handle 1 and is located on the outside of the fixed handle 1. By rotating the rotating handle 1801, the receiving ring 1802 is driven to rotate. Under the action of the limiting guide column 1804, the two limiting rings 1803 can only slide horizontally and in opposite directions. The horizontal movement of the limiting ring 1803 drives the limiting block 1107 and the pull rod 1103 to move horizontally. The movement of the pull rod 1103 drives the spring sheet 1101 to bend. Since the horizontal movement directions of the two pull rods 1103 are opposite, the two spring sheets 1101 can drive the elastic connecting piece 1105 to bend in the direction of the tensioned spring sheet 1101, thereby driving the position of the pliers head to move and adjust the position of the pliers head.

[0045] Furthermore, the movable handle 2 is provided with a shift fork 201 at the hinged position with the fixed handle 1, the inner tube 602 is located at the fork end of the shift fork 201, and the inner tube 602 is provided with retaining rings 6021 on both sides of the corresponding shift fork 201. The shift fork 201 is driven to rotate by rotating the movable handle 2, and the retaining ring 6021 is driven to move forward and backward, thereby driving the inner tube 602 to move forward and backward, so as to realize the opening or closing of the first clamp head 401 by the clamp head pusher 6, and at the same time, the convex teeth 4011 of the first clamp head 401 are charged through the inner tube 602 and the metal sheet 601 to form electrodes.

[0046] In order to make the use of the electrocoagulation forceps safer and more reliable, the inner tube 602 is provided with a limit shell 12 at the corresponding two retaining rings 6021, and the limit shell 12 is slidably connected to the fixed handle 1, and a spring 15 is arranged between one end of the limit shell 12 and the fixed handle 1, and an n-shaped stopper 13 is arranged between the fixed handle 1 and the other end of the limit shell 12, and the transverse section of the n-shaped stopper 13 is rotatably connected to the fixed handle 1, and one end of the transverse section of the n-shaped stopper 13 passes through the outside of the fixed handle 1 and is provided with a rotation limit handle, and the vertical section of the n-shaped stopper 13 faces the fork 201 or the limit shell 12, and a protrusion 1301 is arranged at the end of the vertical section of the n-shaped stopper 13, and grooves corresponding to the protrusion 1301 are opened on the fixed handle 1 at both ends of the rotation path corresponding to the n-shaped stopper 13, and one of the grooves is located at the other end of the limit shell 12. The other end of the transverse section of the n-shaped stopper 13 is provided with an arc display panel 1302, and the arc display panel 1302 is provided with two different colors. The fixed handle 1 is provided with a display through hole corresponding to the arc display panel 1302. By rotating the n-shaped stopper 13 so that its end blocks the stopper ring 6021, it is possible to observe whether the n-shaped stopper 13 is blocked in place through the display through hole.

[0047] The fixed handle 1 is provided with a fixing groove for fixing the T-shaped top rod 1104, and two electrode wire connectors are respectively provided on both sides of the fixing groove, one electrode wire connector is in contact with the inner tube 602, and the other electrode wire connector is in contact with the metal wire 501, and both electrode wire connectors are connected to the electrical connector. A circuit switch is provided between the electrical connector and the two electrode wire connectors, and the circuit switch is provided at the front end of the movable handle 2.

[0048] When in use, the electrical connector is connected to the high-frequency electrosurgical unit, and the rotary switch handle is rotated counterclockwise to drive the n-shaped stopper 13 to rotate counterclockwise, thereby releasing the restriction of the end of the n-shaped stopper 13 on the stopper ring 6021 and the restriction on the inner tube 602; the movable handle 2 can be rotated to make the shift fork 201 push the stopper ring 6021 forward, thereby driving the inner tube 602 forward, making the metal sheet 601 forward, and driving the push sheet 6011 to close the first clamp head 401 toward the second clamp head 402; by pressing the circuit switch at the front end of the movable handle 2, the electrocoagulation forceps is energized, so that one electrode wire connector passes through the inner tube 602 and the metal sheet 601 to charge the convex teeth 4011 of the first clamp 401 to form an electrode, and the other electrode wire connector passes through the metal wire 5 01 makes the conductive layer 5 charged to form an electrode. With the closing of the clamp head, the convex teeth 4011 of the first clamp head 401 and the conductive layer 5 and the tissue therebetween form a closed loop, and the tissue is electrified for electrocoagulation. After the electrocoagulation is completed, the circuit switch at the front end of the movable handle 2 is released to close the circuit; the movable handle 2 is continued to be rotated to push the metal sheet 601 forward so that the metal sheet 601 cuts off the electrocoagulated tissue; then the movable handle 2 is relaxed, and under the action of the spring 15, the limit shell 12 returns to its original position, and at the same time drives the retaining ring 6021, the inner tube 602 and the metal sheet 601 to reset. During the reset of the metal sheet 601, the push piece 6011 moves along the guide groove 403 to the arc-shaped depression of the first clamp head 401, and then the first clamp head 401 is opened. When the position of the clamp head needs to be adjusted, the elastic connector 1105 is driven to bend by rotating the rotating handle 1801 to adjust the position of the clamp head, and the route from the hand-held position to the clamp head position is changed, so that the route has a certain curvature, which is more conducive to surgery.

[0049] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. Laparoscopically cuttable and bendable bipolar electrocoagulation forceps, characterized in that: The invention comprises a fixed handle (1), a movable handle (2), an outer tube (3), a pliers head (4) and an electrical connector, wherein the outer tube (3) is arranged on the fixed handle (1), the distal end of the outer tube (3) passes through the fixed handle (1) and the pliers head (4) is arranged via a bending assembly (11), a pliers head pusher (6) is arranged in the outer tube (3), one end of the pliers head pusher (6) is slidably connected to the pliers head (4) and the bending assembly (11), and the other end extends out of the outer tube (3) and is located in the fixed handle (1), the movable handle (2) is rotatably connected to the fixed handle (1), and the movable handle (2) is transmission-connected to the pliers head pusher (6); The clamp head (4) and the clamp head pusher (6) are electrically connected to an electrical connector, which is located outside the fixed handle (1) and is used to connect to a high-frequency electric knife host; The clamp head (4) comprises a second clamp (402) and a first clamp (401) hinged to the second clamp (402); a first slide groove and a second slide groove are respectively provided in the middle of the first clamp (401) and the second clamp (402); the first clamp (401) is provided with a plurality of convex teeth (4011) at the first slide groove; a ceramic insulating layer (4021) is fixedly provided on the second clamp (402); a conductive layer (5) is provided on the ceramic insulating layer (4021); the conductive layer (5) is provided with grooves corresponding to the convex teeth (4011); a metal wire (501) is connected to the conductive layer (5); and an insulating isolation tube (502) is sleeved on the metal wire (501); The clamp head push piece (6) comprises a metal sheet (601) and an inner tube (602), one end of the metal sheet (601) is located in the slide grooves of the first clamp (401) and the second clamp (402), the metal sheet (601) is in contact with the first clamp (401), the other end of the metal sheet (601) is fixedly connected to the inner tube (602), the inner tube (602) is connected to the electrical connector, one end of the inner tube (602) is provided with an insulating layer, the insulating layer is provided with a through hole, the metal wire (501) passes through the through hole of the inner tube (602) and is connected to the electrical connector; Pushing plates (6011) are provided on both sides of one end of the metal sheet (601), and the two pushing plates (6011) are respectively located on the outsides of the two clamps; an insulating pad layer (4012) is provided on the end surface of the first clamp (401) facing the second clamp (402), and the height of the insulating pad layer (4012) is lower than the convex teeth (4011); The first clamp (401) and the second clamp (402) are both provided with guide grooves (403) on their outer sides, and the two guide grooves (403) are respectively connected to the first slide groove and the second slide groove; The movable handle (2) is provided with a shift fork (201) at the hinged position with the fixed handle (1).

2. The laparoscopically cuttable and bendable bipolar electrocoagulation forceps according to claim 1, characterized in that: The two push pieces (6011) are respectively located in the two guide grooves (403), and the guide groove (403) of the first clamp (401) is provided with an arc-shaped recess at the end facing the outer tube (3).

3. The laparoscopically cuttable and bendable bipolar electrocoagulation forceps according to claim 1, characterized in that: The bending assembly (11) comprises a spring sheet (1101), a pull rod (1103) and an elastic connecting piece (1105). The elastic connecting member (1105) comprises a first elastic member and a second elastic member that are interlocked, the first elastic member and the second elastic member are each divided into a curved section and a fixed section, the middle of each of the curved section and the fixed section is provided with a through slot, the through slot is used for the metal sheet (601) to pass through, the metal wire (501) is fixedly passed through the through slot of the first elastic member, a plurality of arc-shaped plates are arranged at intervals on both sides of the curved section, the inner side of the arc-shaped plates is fixedly connected to the spring sheet (1101), the spring sheet (1101) passes through the fixed section to connect to the pull rod (1103), and the fixed section is sleeved in the outer tube (3); The pull rod (1103) is inserted into the inner tube (602), and through grooves are provided on both sides of the other end of the inner tube (602). The pull rod (1103) is provided with guide plates corresponding to the through grooves, and the two guide plates are staggered. Limit blocks (1107) protruding from the inner tube (602) are provided at both ends of the guide plates. A T-shaped top rod (1104) is also provided between the two pull rods (1103), and a through hole is provided on the T-shaped top rod (1104) for the metal wire (501) to pass through. The T-shaped top rod (1104) is inserted into the inner tube (602), and the two sides are respectively in contact with the two pull rods (1103), and a rotation drive component (18) is sleeved on the limit block (1107).

4. The laparoscopically cuttable and bendable bipolar electrocoagulation forceps according to claim 3, characterized in that: The rotary drive assembly (18) comprises a limit ring (1803), a limit guide post (1804), a receiving ring (1802) and a rotating handle (1801). The limit rings (1803) are two in number. The two limit rings (1803) are sleeved on the inner tube (602). The two limit rings (1803) correspond to the two guide plates respectively. The limit ring (1803) is located between the two limit blocks (1107) of the guide plates. Two limit guide posts (1804) are provided on both sides of the limit ring (1803). The two limit guide posts (1804) are provided on the inner tube (602). 804) is arranged along the axial direction of the limiting ring (1803), the limiting guide column (1804) is rotatably connected to the fixed handle through a clamping piece, the outer ends of the two limiting rings (1803) are opposite threaded sections, the receiving ring (1802) is sleeved on the outer sides of the two limiting rings (1803), and the receiving ring (1802) is threadedly connected to the two limiting rings (1803), the rotating handle (1801) is arranged on the outer side of the receiving ring (1802), and the rotating handle (1801) extends out of the fixed handle (1) and is located on the outer side of the fixed handle (1).

5. The laparoscopically cuttable and bendable bipolar electrocoagulation forceps according to claim 3, characterized in that: The fixed handle (1) is provided with a fixing groove for fixing the T-shaped top rod (1104), and two electrode wire connectors are respectively provided on both sides of the fixing groove, one electrode wire connector is in contact with the inner tube (602), and the other electrode wire connector is in contact with the metal wire (501), and both electrode wire connectors are connected to the electrical connector.

6. The laparoscopically cuttable and bendable bipolar electrocoagulation forceps according to claim 5, characterized in that: A circuit switch is provided between the electrical connector and the two electrode wire connectors, and the circuit switch is provided at the front end of the movable handle (2).

7. The laparoscopically cuttable and bendable bipolar electrocoagulation forceps according to claim 1, characterized in that: The inner tube (602) is located at the fork end of the shift fork (201), and retaining rings (6021) are provided on both sides of the inner tube (602) corresponding to the shift fork (201).

8. The laparoscopically cuttable and bendable bipolar electrocoagulation forceps according to claim 7, characterized in that: The inner tube (602) is sleeved with a limit shell (12) at positions corresponding to the two retaining rings (6021); the limit shell (12) is slidably connected to the fixed handle (1); a spring (15) is arranged between one end of the limit shell (12) and the fixed handle (1); an n-shaped stopper (13) is arranged between the fixed handle (1) and the other end of the limit shell (12); a transverse section of the n-shaped stopper (13) is rotatably connected to the fixed handle (1); one end of the transverse section of the n-shaped stopper (13) passes through the outside of the fixed handle (1) and is provided with a rotation limiter handle; the vertical section of the n-shaped stopper (13) faces the shift fork (201) or the limit shell (12); a protrusion (1301) is arranged at the end of the vertical section of the n-shaped stopper (13); grooves corresponding to the protrusion (1301) are provided on the fixed handle (1) at both ends of the rotation path corresponding to the n-shaped stopper (13); one of the grooves is located at the other end of the limit shell (12).

9. The laparoscopically cuttable and bendable bipolar electrocoagulation forceps according to claim 8, characterized in that: The other end of the transverse section of the n-shaped stopper (13) is provided with a curved display panel (1302), the curved display panel (1302) being provided with two different colors, and the fixed handle (1) is provided with a display through hole at a position corresponding to the curved display panel (1302).

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