Scissor ultrasonic surgical instrument with signal needle arrangement

Abstract

The utility model belongs to the technical field of medical instruments, and discloses a shear type ultrasonic surgical instrument with signal needle arrangement. The shear type ultrasonic surgical instrument comprises a cutter bar assembly and a movable assembly, the cutter bar assembly comprises a waveguide rod, a fixed support and a holding structure, the waveguide rod is sleeved with the fixed support, and the holding structure comprises a first annular handle, a shell, a key and an electronic assembly which is arranged in the shell and makes contact with the key. The electronic assembly comprises an FPC part in contact with the key, a PCB hard board for isolating and supporting the FPC part, a fixing seat for mounting and fixing the FPC part and the PCB hard board, and a plurality of vibrating needles mounted on one side, opposite to the FPC part, of the fixing seat, the plurality of vibrating needles penetrate through the fixing seat, are electrically connected with the PCB hard board and the FPC part and are fixed through soldering tin, the PCB hard board is provided with a key switch, and the key switch is provided with a button. The key switch is used for being in contact with the key. According to the shear type ultrasonic surgical instrument, stable signal connection can be provided, and wire dropping of the tool bit is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of minimally invasive medical instruments, in particular to a scissor-type ultrasonic surgical instrument with a signal needle arrangement. Background Art

[0002] Ultrasonic scalpels have been widely used in various surgical operations. Their working principle is: the ultrasonic equipment host generates high-frequency current, which is transmitted to the transducer assembly in the handle through the handle connecting line. The tail of the ultrasonic guide rod transmits the vibration energy to the tip of the knife. The thermal effect of the mechanical vibration generated can break the hydrogen bonds of tissue proteins, denature and coagulate the proteins, and use mechanical energy and thermal energy to achieve the purpose of cutting, stopping bleeding and coagulating human tissues.

[0003] The common gun-type (grip-type) ultrasonic scalpels on the market have a shorter operating end and a shorter single cutting distance. Due to the slender sleeve structure, there is no way to simply lengthen the working end. Ultrasonic scalpel signal dropout is also a problem. Utility Model Content

[0004] The utility model aims to provide a scissor-type ultrasonic surgical instrument with a signal needle arrangement, aiming to solve the problem in the prior art that the handle is slightly misaligned when screwed into the ultrasonic blade housing, causing signal disconnection. The scissor-type ultrasonic surgical instrument reduces the instantaneous disconnection of the electrical signal caused by the resonance of the elastic needle driven by high-frequency vibration.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A scissor-type ultrasonic surgical instrument with a signal pin arrangement, comprising:

[0007] A knife bar assembly, comprising a waveguide rod, a fixing bracket sleeved on the waveguide rod, and a gripping structure, wherein the knife tip of the waveguide rod is exposed at a first end of the fixing bracket, the gripping structure is arranged at a second end of the fixing bracket, the gripping structure comprises a first annular handle, the first annular handle is arranged at one side of the gripping structure, the gripping structure further comprises a shell, a button arranged on the shell, and an electronic component arranged in the shell and in contact with the button, the button being arranged at the front of the first annular handle;

[0008] The movable component comprises a movable bracket, which is rotatably connected to the fixed bracket via a rotating shaft. A clamping arm is arranged at the first end of the movable bracket, and the clamping arm pivots relative to the knife tip to form clamping and opening. The electronic component (133) comprises an FPC component (1332) in contact with the key (131), a PCB hard board (1333) isolating and supporting the FPC component (1332), a fixing seat (1331) for mounting and fixing the FPC component (1332) and the PCB hard board (1333a), and a plurality of spring pins (1334) mounted on the side of the fixing seat (1331) opposite to the FPC component (1332), wherein the plurality of spring pins (1334) pass through the fixing seat (1331) and are electrically connected to the PCB hard board (1333a) and the FPC component (1332) and are fixed by solder (1337); the PCB hard board (1333b) is provided with a key switch (1336), and the key switch (1336) is used to contact the key (131).

[0009] Beneficial effects of the utility model: The scissor-type ultrasonic surgical instrument provided by the utility model can realize simple and fast operation when the ultrasonic knife rod is connected to the mechanical thread of the handle head, and when the knife head button signal is connected to the handle signal, and the connection is stable and effective. The three groups of signals are provided with 6 spring pins, which can effectively prevent the handle from being slightly misaligned when being screwed into the ultrasonic knife housing, causing the signal to drop out, improve fault tolerance, reduce the requirements for processing accuracy, and reduce the possibility of the operator causing the knife head to drop out due to improper operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the scissor-type ultrasonic surgical instrument provided by an embodiment of the utility model when being held by an operator;

[0011] Figure 2 It is a three-dimensional view of the scissor-type ultrasonic surgical instrument provided by an embodiment of the utility model;

[0012] Figure 3 It is an exploded view of a scissor-type ultrasonic surgical instrument provided by an embodiment of the utility model;

[0013] Figure 4 It is a schematic diagram of the positions of the scissor-type ultrasonic surgical instrument, torque wrench and transducer provided in an embodiment of the utility model;

[0014] Figure 5 It is a schematic diagram of the internal structure of the gripping structure provided by an embodiment of the utility model;

[0015] Figure 6 It is a schematic diagram of the assembly of the key provided by the embodiment of the utility model;

[0016] Figure 7 It is a partial structural schematic diagram of the knife bar assembly provided by an embodiment of the utility model;

[0017] Figure 8 is a cross-sectional view of a key provided by an embodiment of the utility model;

[0018] Fig. 9 It is a partial structural schematic diagram of an electronic component provided by an embodiment of the utility model;

[0019] Fig.10 It is a schematic diagram of the transducer provided by the embodiment of the utility model and the three transducer copper rings separated by insulating plastic at the front end thereof in contact with multiple groups of probes;

[0020] Fig.11 It is a schematic diagram of the distribution of the pinhole seat and the spring pin provided in the embodiment of the utility model;

[0021] Fig.12 It is a structural schematic diagram of the elastic needle provided in the embodiment of the utility model being assembled on the pinhole seat;

[0022] Fig.13 The structure diagram of the rotating shaft provided in the embodiment of the utility model is assembled on the movable bracket and the fixed bracket. Figure 1 ;

[0023] Fig.14 The structure diagram of the rotating shaft provided in the embodiment of the utility model is assembled on the movable bracket and the fixed bracket. Figure 2 ;

[0024] Fig.15 yes Figure 6 Cross-sectional view at AA in the middle;

[0025] Fig.16 yes Figure 7 A' is an enlarged cross-sectional view;

[0026] Fig.17 It is a schematic diagram of the position of the fixing pin provided in the embodiment of the utility model;

[0027] Fig.18 It is a schematic diagram of the structure in which the rotating shaft provided in the embodiment of the utility model is not assembled on the movable bracket and the fixed bracket;

[0028] Fig.19 It is a schematic diagram of the structure of the groove and shallow groove provided in the embodiment of the utility model;

[0029] Fig. 20 This is a front view of the scissor-type ultrasonic surgical instrument provided by an embodiment of the utility model;

[0030] Fig.21 yes Fig.14 Cross-section at the middle BB;

[0031] Fig. 22 It is a schematic diagram of the knife tip and the clamping arm provided by the embodiment of the utility model when they are not clamped;

[0032] Fig.23 It is a schematic diagram of the knife tip and the clamping arm provided by the embodiment of the utility model when clamped.

[0033] In the figure:

[0034] 10. Scissor-type ultrasonic surgical instruments; 20. Torque wrench; 30. Transducer;

[0035] 100, knife bar assembly; 110, waveguide rod; 111, knife tip; 120, fixed bracket; 121, guide stopper; 130, grip structure; 131, button; 1311, base; 1312, arc beam; 1313, connection structure; 13131, vertical plate; 13132, intermediate body; 132, shell; 1321, recessed structure; 1322, plane baffle; 1323, side plate; 1324 , vertical baffle; 133, electronic components; 1331, fixing seat; 1332, FPC parts; 1333, PCB hard board; 1334, spring pin; 1335, encryption chip; 1336, key switch; 1337, solder; 1338, pinhole seat; 1339, limit card plate; 134, limit plate; 135, transducer copper ring; 136, insulating plastic; 137, stopper; 140, first ring handle;

[0036] 200, movable assembly; 210, movable bracket; 211, mounting hole; 220, clamping arm; 230, second ring handle; 240, clamping plate; 250, fixing pin; 260, assembly pin;

[0037] 300, rotating shaft; 310, first step; 320, second step; 321, mounting groove; 322, shallow groove;

[0038] 400. Solder point. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0040] This embodiment provides a scissor-type ultrasonic surgical instrument with a signal needle arrangement, such as Figure 1-Figure 23As shown, the scissor-type ultrasonic surgical instrument 10 includes a knife bar assembly 100 and a movable assembly 200. The knife bar assembly 100 includes a waveguide rod 110, a fixed bracket 120 sleeved on the waveguide rod 110, and a gripping structure 130. The knife tip 111 of the waveguide rod 110 is exposed at the first end of the fixed bracket 120. The gripping structure 130 is arranged at the second end of the fixed bracket 120. The gripping structure 130 includes a first annular handle 140, which is arranged at one side of the gripping structure 130. The gripping structure 130 also includes a housing 132, a button 131 arranged on the housing 132, and an electronic assembly 133 arranged in the housing 132 and in contact with the button 131. The button 131 is arranged at the front of the first annular handle 140. The button 131 is an I-shaped structure, which includes a base 1311, an arc-shaped beam 1312 that is convex relative to the base 1311, and a connecting structure 1313 connecting the base 1311 and the arc-shaped beam 1312. The base 1311 has a flat end protrusion, which contacts the electronic component 133. The arc-shaped beam 1312 is exposed from the housing 132 to facilitate finger operation. The movable component 200 includes a movable bracket 210, which is rotatably connected to the fixed bracket 120 through a rotating shaft 300. The first end of the movable bracket 210 is provided with a clamping arm 220, which pivots relative to the blade tip 111 to form a clamping and opening. The clamping arm 220 includes a metal clamp and a tissue gasket installed on the metal clamp.

[0041] The scissor-type ultrasonic surgical instrument 10 provided in this embodiment has an I-shaped button 131, and the arc beam 1312 is convexly arranged relative to the base 1311 and exposed to the shell 132. The operator can press or push the center position or the two end positions of the arc beam 1312 at different angles to excite the scissor-type ultrasonic surgical instrument 10, and the operating angle is free. For example, the button 131 can be pressed in a vertical direction, or the two sides can be pressed at an inclined angle, so that the operator can operate the ultrasonic instrument at other more free angles. The operation is comfortable and there will be no problem of getting stuck and not returning to the position. The clamping arm 220 and the blade tip 111 can open a larger angle relative to the grip-type ultrasonic knife, which is convenient to operate and improves the shearing accuracy. The front part of the first annular handle 140 can be provided with an excitation button for adjusting the cutting and coagulation gears.

[0042] See also Figure 5-Figure 12In this embodiment, the electronic component 133 includes an FPC component 1332 in contact with the button 131, a PCB hard board 1333 isolating and supporting the FPC component 1332, a fixing seat 1331 for installing and fixing the FPC component 1332 and the PCB hard board 1333, and a plurality of spring pins 1334 installed on the side of the fixing seat 1331 opposite to the FPC component 1332. The FPC component 1332 is an FPC soft board. Both ends of the FPC component 1332 are respectively fixed on the PCB hard board 1333 and then fixed on the fixing seat 1331. The fixing seat 1331 has a central circular hole, so that the waveguide rod 110 can pass through the central circular hole. A plurality of spring pins 1334 pass through the fixing seat 1331 and are electrically connected to the PCB hard board 1333 and the FPC component 1332 and are fixed by solder 1337. A key switch 1336 is provided on the PCB hard board 1333, and the key switch 1336 is used to contact the key 131. The number of key switches 1336 is at least two. The fixing seat 1331 serves as a skeleton supporting the FPC component 1332 and the PCB hard board 1333, and improves the assembly stability of the FPC component 1332 and the PCB hard board 1333. The fixing seat 1331 is provided with a plurality of holes (not shown), and the housing is provided with a plurality of columns (not shown) matched with the plurality of holes.

[0043] The two ends of the FPC component 1332 are respectively fixed on two PCB hard boards 1333 installed on the two ends of the fixing seat 1331. One end of the FPC component 1332 is welded and installed on a PCB hard board 1333 and then fixed to one end of the fixing seat 1331, and the other end of the FPC is installed on another PCB hard board 1333 and then clamped to the other end of the fixing seat 1331. The two ends of the fixing seat 1331 are folded.

[0044] The fixing seat 1331 is provided with a plurality of grooves, and during assembly, the PCB hard board 1333 assembly at one end of the FPC component 1332 is inserted from the groove to fix the PCBA hard board assembly. The spring pin 1334 passes through the holes in the fixing seat 1331, the PCB hard board 1333 and the FPC component 1332, and is connected to the FPC component 1332 circuit and fixed by solder 1337, so as to realize the connection of the three groups of signals of grounding, MAX gear signal and MIN gear signal.

[0045] Furthermore, the PCB hard board 1333 is also provided with an encryption chip 1335, and the encryption chip 1335 is electrically and signal-connected to the FPC component 1332. The encryption chip 1335 is preferably provided between two key switches 1336 on the fixing seat 1331. The encryption chip 1335 assists in realizing the encryption function and improves the security of data acquisition and use.

[0046] In this embodiment, limit card plates 1339 for clamping the key switch 1336 are respectively provided on both sides of the PCB hard board 1333. Two keys 131 and key switches 1336 are each provided. The key 131 includes a MAX key and a MIN key, which are respectively used for stimulating cutting and coagulation. The encryption chip 1335 is arranged between the two key switches 1336, and a limit plate 134 is provided around the side of the encryption chip 1335, so that the key switch 1336 is arranged between the limit plate 134 and the corresponding limit card plate 1339 to ensure a stable installation. The two keys 131 of this embodiment are two independent entities, and two completely independent tracks are arranged in the shell 132, that is, the two keys 131 have their own independent key 131 movement tracks, so that pressing any one of the keys 131 will not affect the stimulation of the other key 131, and it is less likely to cause accidental touch. Preferably, a stopper 137 is provided in the housing 132 to prevent the button 131 from being assembled in the reverse direction. The stopper 137 is parallel to the track of the button 131 (ie, two oppositely disposed planar baffles 1322 ) and will not cause the button 131 to get stuck when pressed.

[0047] Optionally, a plurality of elastic needles are distributed on both sides of the center line of the middle fixing seat (1331) and are arranged in an asymmetric pattern. Preferably, the plurality of elastic needles distributed on both sides of the center line of the fixing seat (1331) are the same in number. The elastic needles 1334 are divided into three groups, and the three groups of elastic needles 1334 are respectively electrically connected to the transducer copper rings 135 with three different diameters, and are used to connect the three groups of electrical signals on the transducer copper rings 135, wherein the elastic needles 1334 connected to the transducer copper rings 135 of the same diameter are a group, and the number of each group of elastic needles 1334 is at least two, so as to avoid the problem of slight misalignment during installation, which may cause signal disconnection, improve fault tolerance, reduce the requirements for processing accuracy, reduce the possibility of disconnection caused by improper operation of the operator, and greatly reduce the occurrence of the problem of instantaneous disconnection of the electrical signal caused by the resonance of the elastic needles 1334 driven by high-frequency vibration. Preferably, each of the spring pins 1334 is fixed in a pinhole seat 1338 which is integrally formed with the fixing seat 1331 and protrudes from the fixing seat 1331 , so as to ensure that the spring pins 1334 are firmly installed.

[0048] like Figure 13-Figure 17As shown, in one embodiment, a circular groove is provided on one or both sides of the fixed bracket 120, and a circular hole and circular groove are provided on one or both sides of the corresponding movable bracket 210, and the fixed bracket 120 is inserted into the square hole in the middle of the movable bracket 210, and the circular holes and circular grooves on one or both sides are aligned with the center of the circle, and a rotating shaft 300 is placed on each side or both sides. The rotating shaft 300 is a stepped column, and the stepped column includes a first step 310 and a second step 320 connected to each other, and the diameter of the second step 320 is larger than the diameter of the first step 310. The first step 310 is rotatably inserted into the circular groove of the fixed bracket 120, and the second step 320 is penetrated in the circular hole and circular groove of the movable bracket 210 and has an interference fit with the circular hole of the movable bracket 210. The second step 320 is riveted into the circular hole and circular groove of the movable bracket 210, and the second step 320 rotates around the circular surface with the fixed bracket 120, and the rotating shaft 300 is relatively fixed with the movable bracket 210. The second step 320 and the movable bracket 210 can also be fixed by welding. Welding fixation can make the connection between the second step 320 and the movable bracket 210 more stable, so that the rotating shaft 300 will not loosen and fall off during the use of the scissor-type ultrasonic surgical instrument 10. After the riveting assembly is completed, laser welding is performed on the outer surface of the second step 320 of each rotating shaft 300 on both sides and the gap between the movable bracket 210. Four points are made, and the four points are distributed at 90°. (Or a full circle of laser welding can be performed along the circular gap.) Laser welding can make the connection between the riveted rotating shaft 300 and the movable bracket 210 more stable, so as to prevent the rotating shaft 300 from loosening and falling off during the operation of the scissor-type ultrasonic surgical instrument 10. Preferably, there are gaps between the bottom surface of the rotating shaft 300 and the bottom surface of the circular groove of the fixed bracket 120, and between the step surface of the rotating shaft 300 and the plane of the circular groove mouth of the fixed bracket 120, so as to prevent damaging friction between the rotating shaft 300 and the fixed bracket 120 when the movable bracket 210 rotates, thereby preventing sharp and piercing noises.

[0049] Optionally, in order to ensure the quality of welding and the appearance of welding, laser welding is used during welding, argon is used as the protective gas for blowing, welding is performed by adding welding wire, and after welding, the blackened welding points 400 can be wiped with medical alcohol for cleaning. Exemplarily, there are four welding points 400 during laser welding, and the four welding points 400 are evenly distributed along the circumference of the second step 320. Alternatively, a full circle of laser welding can be performed between the second step 320 and the movable bracket 210 along the circumference of the second step 320 to improve the connection stability and prevent long-term violent use. Failure of the welding points 400 causes the rotation damage of the shaft 300, which is redundant protection for the shaft 300.

[0050] See also Fig.18 and Fig.19In another embodiment, the rotating shaft 300 is a stepped column, which includes a first step 310 of a small diameter and a second step 320 of a large diameter connected to each other. The first step 310 is rotatably inserted into the circular groove of the fixed bracket 120, and an external thread is arranged on the outer peripheral surface of the second step 320. An internal thread is arranged in the circular hole of the movable bracket 210. The second step 320 is threadedly connected with the movable bracket 210, and a mounting groove 321 for screwing is arranged on the end surface of the second step 320 away from the first step 310. During assembly, a screwdriver is used to abut the end of the screwdriver against the mounting groove 321, and the second step 320 is screwed to be screwed into the circular hole of the movable bracket 210, which is convenient for operation. Optionally, the mounting groove 321 is set as a square groove, which matches the shape of the end of the screwdriver. In addition, the shape of the mounting groove 321 can also be other polygonal shapes, such as a triangle, a pentagon, a hexagon, etc. The shape of the mounting groove 321 can also be a plurality of disconnected smaller grooves, which correspond to a plurality of corresponding protruding positions on the screwdriver. The screwdriver can screw the threads on the second step 320 into the internal threads of the movable bracket 210 through these small grooves.

[0051] Furthermore, a plurality of shallow grooves 322 for rotational positioning and / or welding point positioning are further provided on the end surface of the second step 320 away from the first step 310. After the second step 320 is screwed to the round hole of the movable bracket 210, in order to improve the connection reliability, the second step 320 and the movable bracket 210 can be further welded and fixed, and the shallow grooves 322 are conducive to welding point positioning. In this embodiment, the shallow grooves 322 are set as cross-shaped shallow grooves, which can effectively ensure that the positions of the welding points 400 are consistent during mass production.

[0052] like Fig.14 As shown, optionally, a guide stopper 121 is convexly provided on the fixed bracket 120, and a stopper groove matching the guide stopper 121 is provided on the movable bracket 210. The stopper groove clamps the guide stopper 121, and the guide stopper 121 can reduce the shaking of the movable bracket 210 along the length direction. The guide stopper 121 is preferably arranged in the middle position of the fixed bracket 120. Further, see Fig.12 The rotating shaft 300 can be rotatably inserted into the guide stop block 121 and the movable bracket 210, and the movable bracket 210 and the rotating shaft 300 are interference-fitted, which is easy to assemble. For example, the rotating shaft 300 can be a rotating shaft pin. The fixed bracket 120 and the movable bracket 210 of the knife bar assembly 100 are assembled in a clearance fit manner.

[0053] See also Fig. 20 and Fig.21Preferably, a limiting groove is provided on the side of the shell 132 away from the first annular handle 140, a second annular handle 230 is provided on the second end of the movable bracket 210, and the second annular handle 230 is provided with a limiting protrusion aligned and matched with the limiting groove; or a limiting protrusion is provided on the side of the shell 132 away from the first annular handle 140, and the second annular handle 230 is provided with a limiting groove aligned and matched with the limiting groove. During use, the operator holds the first annular handle 140 and the second annular handle 230. When the second annular handle 230 moves toward the housing 132, the limiting protrusion is inserted into the limiting groove. The limiting groove can limit and guide the second annular handle 230 to the left and right, so as to prevent the second annular handle 230 from shaking or tilting during the movement, so that during the clamping process, the clamping force of the scissor-type ultrasonic surgical instrument 10 remains stable, and the cutting speed is stable and controllable. Secondly, after the second annular handle 230 is pressed against the housing 132, the limiting protrusion is pressed against the limiting groove, and the operator can more easily keep the scissor-type ultrasonic surgical instrument 10 in a clamped state. Exemplarily, the limiting groove is a V-shaped opening. During the downward pressing process of the movable component 200, the V-shaped notch can guide the second annular handle 230 so that the second annular handle 230 does not tilt left and right, and does not affect the misalignment of the ultrasonic blade tip 111 and the tissue pad, which affects clamping and cutting. In addition, for situations where the knife tip 111 needs to be clamped slowly or a large area needs to be cut, the movable component 200 is usually required to clamp and fit the shell 132 of the knife rod assembly 100, keep it still, and press and hold the activation button 131 to continuously activate it. The cooperation of the limiting protrusion and the limiting groove can make it easier for the operator to maintain such a clamping state without causing unnecessary shaking.

[0054] The first ring handle 140 is the gripping part of the operator's middle finger, ring finger, and little finger, and the second ring handle 230 is the manipulation part of the operator's thumb. The first ring handle 140 is immovable, and the thumb presses down and lifts up the second ring handle 230 to complete the clamping and loosening of the scissors. Alternatively, the first ring handle 140 is the manipulation part of the operator's thumb, and the second ring handle 230 is the gripping part of the operator's middle finger, ring finger, and little finger. The first ring handle 140 is immovable, and the middle finger, ring finger, and little finger pull down and lift up the second ring handle 230 to complete the loosening and clamping of the scissors.

[0055] like Fig. 22 and Fig.23As shown, the working surface of the clamping arm 220 is designed as an inclined surface. For example, the surface where the metal clamp of the clamping arm 220 is assembled with the tissue pad is set to be inclined at a certain angle. Then, the working surface of the tissue pad installed in the metal clamp that contacts the tissue or the blade tip is also inclined at a certain angle. The surface where the blade tip contacts the tissue pad or tissue is the working surface of the blade tip. When the working surface of the clamping arm 220 and the working surface of the blade tip 111 start to contact each other, there is an angle θ of 1°-5°. For example, θ can be 1°, 1.5°, 2°, 2.5°, 3°, 3.5°, 4°, 4.5° or 5°, and the angle θ is preferably 2°-3°, including 2° and 3°. In the prior art, when the clamping arm 220 is clamped with the blade tip 111, the defect of uneven clamping force distribution is prone to occur. Usually, when clamping, the blade tip 111 requires a certain clamping force, and the main body material of the movable bracket 210 is often a metal material, such as aluminum alloy or stainless steel. The handle of the movable bracket 210 is made of polymer resin (PC / ABS plastic). When the handle is pressed down to reach such a large clamping force, the metal body and handle of the movable bracket 210 will be deformed, and this deformation will aggravate the uneven distribution of the clamping force. When the second ring-shaped handle 230 is pressed down, the area of ​​the clamping arm 220 and the blade tip 111 is continuously increased, and the clamping force is continuously increased. When the second ring-shaped handle 230 reaches the limit, the clamping force of the blade tip 111 reaches the force required for the operation. At this time, the distribution force of the clamping arm 220 and the blade tip 111 is relatively uniform. In addition, by setting an angle of 1°-5° to compensate for the deformation of the movable component 200, the material of the second ring-shaped handle 230 can be selected from a resin with good elasticity. When the scissor-type ultrasonic surgical instrument 10 clamps thicker tissue, the elastic deformation of the second ring-shaped handle 230 can absorb the clamping force, avoid excessive clamping force, and maintain stable clamping force.

[0056] When the scissor-type ultrasonic surgical instrument 10 and the transducer 30 are assembled, the transducer 30 is connected to the knife bar assembly 100 through a mechanical thread. After the transducer 30 passes through the housing 132 and is connected to the knife bar assembly 100 through a thread, the three concentrically arranged transducer copper rings 135 at the front end of the transducer 30 are simultaneously connected to a plurality of spring pins 1334 in groups, and an insulating plastic 136 is arranged between adjacent transducer copper rings 135. When the transducer 30 and the spring pins 1334 are in contact, the three transducer copper rings 135 are synchronously contacted with the three groups of spring pins 1334 in a one-to-one correspondence, which can reduce the possibility that the ultrasonic instrument may cause the spring pins 1334 to resonate during high-frequency vibration and cause signal disconnection. The mechanical thread connection between the knife bar assembly 100 and the transducer 30 and the signal connection between the key signal of the knife bar assembly 100 and the three transducer copper rings 135 at the front end of the transducer 30 need to be simple and fast during operation, and the connection should be stable and effective. The three groups of signals are ground signal, MAX gear signal and MIN gear signal, which correspond to three transducer copper rings 135 of different diameters at the front end of the transducer 30. When the transducer 30 is connected and the shank screw thread is screwed in, the concentric transducer copper rings 135 are also in synchronous contact with the spring pin 1334, realizing a simple synchronous connection.

[0057] When the scissor-type ultrasonic surgical instrument 10 is connected to the transducer 30, the torque wrench 20 acts on the fixing bracket 120, so that the scissor-type ultrasonic surgical instrument 10 is tightly connected to the transducer 30. In this embodiment, for different uses, the effective length of the fixing bracket 120 can be 90 mm or 170 mm.

[0058] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A scissor-type ultrasonic surgical instrument with a signal pin arrangement, characterized in that: include: A knife rod assembly (100) comprises a waveguide rod (110), a fixed bracket (120) sleeved on the waveguide rod (110), and a gripping structure (130), wherein a knife tip (111) of the waveguide rod (110) is exposed at a first end of the fixed bracket (120), the gripping structure (130) is arranged at a second end of the fixed bracket (120), the gripping structure (130) comprises a first annular handle (140), the first annular handle (140) is arranged at one side of the gripping structure (130), and the gripping structure (130) further comprises a shell (132), a button (131) arranged on the shell (132), and an electronic component (133) arranged in the shell (132) and in contact with the button (131); A movable assembly (200) comprises a movable bracket (210), wherein the movable bracket (210) is rotatably connected to the fixed bracket (120) via a rotating shaft (300), and a clamping arm (220) is provided at a first end of the movable bracket (210), and the clamping arm (220) pivots relative to the knife tip (111) to form clamping and opening; The electronic component (133) comprises an FPC component (1332) in contact with the key (131), a PCB hard board (1333) isolating and supporting the FPC component (1332), a fixing seat (1331) for mounting and fixing the FPC component (1332) and the PCB hard board (1333), and a plurality of spring pins (1334) mounted on the side of the fixing seat (1331) opposite to the FPC component (1332). The plurality of spring pins (1334) pass through the fixing seat (1331) to be electrically connected to the PCB hard board (1333) and the FPC component (1332) and are fixed by solder (1337). The PCB hard board (1333) is provided with a key switch (1336).

2. The scissor-type ultrasonic surgical instrument according to claim 1, characterized in that: The plurality of elastic pins (1334) are distributed on both sides of the center line of the fixing seat (1331) and are arranged in an asymmetric or symmetric pattern.

3. The scissor-type ultrasonic surgical instrument according to claim 2, characterized in that: The spring pins (1334) are divided into three groups. The three groups of spring pins (1334) are respectively electrically connected to transducer copper rings (135) with three different diameters, and are used to connect three groups of electrical signals on the transducer copper rings (135). The spring pins (1334) connected to the transducer copper rings (135) with the same diameter form a group, and the number of spring pins (1334) in each group is at least two.

4. The scissor-type ultrasonic surgical instrument according to claim 1, characterized in that: Each of the elastic pins (1334) is fixed in a pinhole seat (1338) which is integrally formed with the fixing seat (1331) and protrudes from the fixing seat (1331).

5. The scissor-type ultrasonic surgical instrument according to claim 1, characterized in that: The PCB hard board (1333) is also provided with an encryption chip (1335).

6. The scissor-type ultrasonic surgical instrument according to claim 1, characterized in that: The fixing seat (1331) has a central circular hole, so that the waveguide rod (110) can pass through the central circular hole.

7. The scissor-type ultrasonic surgical instrument according to claim 1, characterized in that The two ends of the FPC component (1332) are respectively fixed on two PCB hard boards (1333) installed at the two ends of the fixing seat (1331).

8. The scissor-type ultrasonic surgical instrument according to any one of claims 1 to 7, characterized in that: The rotating shaft (300) is a stepped column, which includes a first step (310) and a second step (320) connected to each other, the diameter of the second step (320) is larger than the diameter of the first step (310), the first step (310) is rotatably inserted into the circular groove of the fixed bracket (120), the second step (320) is inserted into the circular hole of the movable bracket (210) and is interference fit with the circular hole of the movable bracket (210), and the second step (320) and the movable bracket (210) are fixed by welding; or, the first step (310) is rotatably inserted into the circular groove of the fixed bracket (120), the outer peripheral surface of the second step (320) is provided with an external thread, the circular hole of the movable bracket (210) is provided with an internal thread, and the second step (320) and the movable bracket (210) are threadedly connected.

9. The scissor-type ultrasonic surgical instrument according to any one of claims 1 to 7, characterized in that: A limiting groove is provided on a side of the shell (132) away from the first annular handle (140), a second annular handle (230) is provided on the second end of the movable bracket (210), and the second annular handle (230) is provided with a limiting protrusion aligned and matched with the limiting groove; or a limiting protrusion is provided on a side of the shell (132) away from the first annular handle (140), and the second annular handle (230) is provided with a limiting groove aligned and matched with the limiting protrusion.

10. The scissor-type ultrasonic surgical instrument according to any one of claims 1 to 7, characterized in that: The working surface of the clamping arm (220) is an inclined surface, and when the working surface of the clamping arm (220) and the working surface of the knife tip (111) begin to contact each other, there is an angle θ, wherein 1°≤θ≤5°.

Images