Shear type ultrasonic surgical instrument with forcep head included angle

Abstract

The utility model belongs to the technical field of medical instruments, and discloses a shear type ultrasonic surgical instrument with a forcep head included angle. 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 a cutter point of the waveguide rod is exposed out of the first end of the fixed support; the movable assembly comprises a movable support, the movable support is rotationally connected with the fixed support through a rotating shaft piece, a clamping arm is arranged at the first end of the movable support, a second annular handle is arranged at the second end of the movable support, and the clamping arm pivots relative to the tool nose to form clamping closing and opening. The working surface of the clamping arm is an inclined plane, an included angle theta is formed between the working surface of the clamping arm and the working surface of the tool nose when the working surface of the clamping arm and the working surface of the tool nose start to be in contact, and the included angle theta is larger than or equal to 1 degree and smaller than or equal to 5 degrees. According to the shear type ultrasonic surgical instrument, a large angle can be formed between the clamping arm and the tool nose, the clamping force is uniform, the cutting speed is stable, operation is convenient, and the shearing accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a scissor-type ultrasonic surgical instrument with a clamp head angle. Background Art

[0002] The ultrasonic scalpel is a new medical device for surgical operations. Its working principle is: the ultrasonic equipment host generates high-frequency current, and the piezoelectric ceramic material uses the piezoelectric effect to convert the high-frequency current into high-frequency mechanical vibration energy, and amplifies this high-frequency mechanical vibration energy. The thermal effect it produces 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. Compared with traditional electric scalpels and gun-type (grip-type) ultrasonic scalpels, scissors-type ultrasonic scalpels can provide a longer working end cutting length and meet the clamping force requirements. At the same time, using long-distance ultrasonic scissors can achieve a larger operating end opening angle and a larger opening distance. Utility Model Content

[0004] The utility model aims to provide a scissor-type ultrasonic surgical instrument with a clamp head angle, aiming to solve the problem of uneven distribution of ultrasonic knife clamping force in the prior art. The scissor-type ultrasonic surgical instrument is easy to operate, improves shearing accuracy, and has uniform clamping force distribution.

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

[0006] A scissor-type ultrasonic surgical instrument, 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] A movable assembly, comprising a movable bracket, the movable bracket being rotatably connected to the fixed bracket via a rotating shaft, a clamping arm being arranged at a first end of the movable bracket, and the clamping arm pivoting relative to the knife tip to form clamping and opening;

[0009] The working surface of the clamping arm is an inclined surface. When the working surface of the clamping arm and the working surface of the tool tip begin to contact each other, there is an angle θ, and the range of the angle θ is 1°≤θ≤5°. 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 knife tip and the clamping arm provided by the embodiment of the utility model when they are not clamped;

[0015] Figure 6 It is a schematic diagram of the knife tip and the clamping arm provided by the embodiment of the utility model when clamped;

[0016] Figure 7 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 ;

[0017] Figure 8 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 ;

[0018] Fig. 9 yes Figure 8 Cross-sectional view at AA in the middle;

[0019] Fig.10 yes Fig. 9 A' is an enlarged cross-sectional view;

[0020] Fig.11 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;

[0021] Fig.12 It is a schematic diagram of the structure of the groove and shallow groove provided in the embodiment of the utility model;

[0022] Fig.13 It is an assembly schematic diagram of another implementation mode of the rotating shaft member provided in the embodiment of the utility model;

[0023] Fig.14 This is a front view of the scissor-type ultrasonic surgical instrument provided by an embodiment of the utility model;

[0024] Fig.15 yes Fig.14 Cross-section at the middle BB;

[0025] Fig.16 It is a schematic diagram of the internal structure of the gripping structure provided by an embodiment of the utility model;

[0026] Fig.17 It is a schematic diagram of the assembly of the key provided by the embodiment of the utility model;

[0027] Fig.18 It is a partial structural schematic diagram of the knife bar assembly provided by an embodiment of the utility model;

[0028] Fig.19 is a cross-sectional view of a key provided by an embodiment of the utility model;

[0029] Fig. 20 It is a partial structural schematic diagram of an electronic component provided by an embodiment of the utility model;

[0030] Fig.21 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;

[0031] Fig. 22 It is a schematic diagram of the distribution of the pinhole seat and the spring pin provided in the embodiment of the utility model;

[0032] Fig.23 It is a structural schematic diagram of the elastic needle provided by the embodiment of the utility model being assembled on the pinhole seat.

[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; 220a, metal clamp; 220b, tissue pad; 230, second ring handle; 240, splint; 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] The present embodiment provides a scissor-type ultrasonic surgical instrument, which aims to solve the problems in the prior art, such as inconvenient operation between the clamping arm and the blade tip, a small opening angle of the clamping arm, resulting in poor shearing accuracy, inconsistent shearing speed, and uneven clamping force distribution. The scissor-type ultrasonic surgical instrument can open a larger angle between the clamping arm and the blade tip, is easy to operate, and has improved shearing accuracy. The blade rod assembly rotates stably and smoothly, the blade tip can output a large clamping force, and the clamping force is evenly distributed. The connection between the button, the spring pin and the transducer electrical signal is stable.

[0041] like 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 convex block, 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, and the second end of the movable bracket 210 is provided with a second annular handle 230. The clamping arm 220 pivots relative to the blade tip 111 to form clamping and opening. The clamping arm 220 includes a metal clamp and a tissue gasket mounted on the metal clamp. The blade tip 111 is straight or curved, and the clamping arm 220 is also straight or curved accordingly.

[0042] like Figure 5 and Figure 6 As shown, the working surface of the clamping arm 220 is designed to be 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 tip of the knife is also inclined at a certain angle. The surface where the tip of the knife contacts the tissue pad or tissue is the working surface of the tip of the knife. There is an angle θ of 1°-5° between the two working surfaces that come into contact with each other when the clamping arm 220 and the tip of the knife 111 start to contact each other. 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°. Since the clamping arm 220 includes the metal clamp 220a and the tissue pad 220b, the thickness of the tissue pad 220b installed and fixed on the metal clamp 220a is basically the same, so the angle α (not shown) between the working surface of the metal clamp and the working surface of the blade tip 111 when the clamping arm 220 and the blade tip 111 begin to contact each other is substantially the same as the range of the angle θ.

[0043] The working surface of the metal clip 220a is the top surface covered by the tissue pad 220b. The working surface of the clamp arm 220 refers to the surface formed on the tissue pad 220b after the metal clip 220a is installed with the tissue pad 220b, which contacts the tissue or the blade tip 111. The surface of the blade tip 111 refers to the surface of the blade tip 111 that contacts the tissue or the tissue pad 220b.

[0044] In the prior art, when the clamping arm 220 and the blade tip 111 are clamped, the defect of uneven clamping force distribution is easy to occur. Usually, when clamping, the blade tip 111 requires a certain clamping force, and the main body material of the movable bracket 210 and the fixed bracket is often a metal material, such as aluminum alloy, stainless steel. The manufacturing of the fixed bracket and / or the movable bracket 210 includes the following methods: machining, powder metallurgy, and 3D printing. The handle of the movable bracket 210 includes a polymer resin (PC / ABS plastic) material.

[0045] 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, such as PC / ABS plastic. 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, maintain stable clamping force, and make the cutting speed stable.

[0046] 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.

[0047] like Figure 7-Figure 9As 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.

[0048] 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.

[0049] See also Fig.10 and Fig.11In 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.

[0050] 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.

[0051] like Fig.11 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.

[0052] See also Fig.14 and Fig.15Preferably, a limiting groove is provided on the side of the shell 132 away from the first annular handle 140, and the second annular handle 230 at the second end of the movable bracket 210 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.

[0053] 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.

[0054] See also Figure 16-Figure 22In 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 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 FPC component 1332 is an FPC soft board. The two ends of the FPC component 1332 are respectively fixed on the PCB hard board 1333 and then fixed on the fixing seat 1331. The 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 button 131. The number of the key switches 1336 is at least two. The fixing seat 1331 serves as a skeleton to support the FPC component 1332 and the PCB hard board 1333, thereby improving the assembly stability of the FPC component 1332 and the PCB hard board 1333. 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, thereby realizing the connection of three groups of signals: grounding, MAX gear position signal and MIN gear position signal.

[0055] Furthermore, an encryption chip 1335 is also provided on the PCB hard board 1333, and the encryption chip 1335 is 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.

[0056] 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.

[0057] Optionally, the spring pins 1334 are divided into three groups, and the three groups of spring pins 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 spring pins 1334 connected to the transducer copper rings 135 of the same diameter are a group, and the number of spring pins 1334 in each group is at least two, so as to avoid the problem of signal disconnection caused by slight misalignment during installation, 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 spring pins 1334 driven by high-frequency vibration. Preferably, each of the spring pins 1334 is fixed in a pinhole seat 1338 integrally formed with the fixing seat 1331 and protruding from the fixing seat 1331, so as to ensure that the spring pins 1334 are firmly installed.

[0058] 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.

[0059] 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 .

[0060] 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 clamp head angle, 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), a clamping arm (220) is disposed at a first end of the movable bracket (210), a second ring-shaped handle (230) is disposed at a second end of the movable bracket (210), and the clamping arm (220) pivots relative to the knife tip (111) to form clamping and opening; The working surface of the clamping arm (220) is an inclined surface. 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, and the range of the angle θ is 1°≤θ≤5°.

2. The scissor-type ultrasonic surgical instrument according to claim 1, characterized in that: The range of the angle θ is 2°≤θ≤3°.

3. The scissor-type ultrasonic surgical instrument according to claim 1, characterized in that: The clamping arm (220) comprises a metal clamp and a tissue pad. When the clamping arm (220) and the knife tip (111) begin to contact each other, an angle α exists between the working surface of the metal clamp and the working surface of the knife tip (111). The angle α has the same range as the angle θ.

4. The scissor-type ultrasonic surgical instrument according to claim 1, characterized in that: During operation, the working range of the clamping force F applied between the clamping arm (220) and the knife tip (111) is 20N≤F≤30N.

5. The scissor-type ultrasonic surgical instrument according to claim 1, characterized in that: The material of the first ring-shaped handle (140) and / or the second ring-shaped handle (230) includes PC / ABS plastic.

6. The scissor-type ultrasonic surgical instrument according to claim 1, characterized in that: The fixed bracket and the movable bracket both include metal material, and the manufacturing method of the metal material includes the following methods: machining, powder metallurgy, or 3D printing.

7. The scissor-type ultrasonic surgical instrument according to any one of claims 1 to 6, 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.

8. The scissor-type ultrasonic surgical instrument according to any one of claims 1 to 6, 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 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 6, characterized in that: A guide limit block (121) is protrudingly provided on the fixed bracket (120), and a limit groove matching the guide limit block (121) is provided on the movable bracket (210), wherein the limit groove clamps and guides the limit block (121).

10. The scissor-type ultrasonic surgical instrument according to any one of claims 1 to 6, characterized in that: 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 a 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 (1333) and the FPC component (1332) and are fixed by solder (1337), and the PCB hard board (1333) is provided with a key switch (1336), and the key switch (1336) is used to contact the key (131).

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