Scissor type ultrasonic surgical instrument with handle limiting structure

Abstract

The utility model belongs to the technical field of medical instruments, and discloses a shear type ultrasonic surgical instrument with a handle limiting structure. The shear type ultrasonic surgical instrument comprises a cutter bar assembly and a movable assembly, the cutter bar assembly comprises a holding structure, and the holding structure comprises a first annular handle; the movable assembly comprises a second annular handle, the second annular handle is provided with a groove or a protrusion, and the side, away from the first annular handle, of the holding structure is provided with a protrusion or a groove which is matched with the second annular handle in an aligned mode when the second annular handle is clamped. According to the ultrasonic surgical instrument provided by the utility model, the movable assembly can be limited, and the clamping force is stable and consistent and the cutting speed is stable and controllable under the condition that the movable assembly cannot be continuously pressed downwards and the head of the instrument is clamped.

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 handle limiting structure. Background Art

[0002] The ultrasonic scalpel is a new surgical instrument that has been widely used in various surgical procedures. The operating principle of the ultrasonic scalpel system is as follows: the ultrasonic device generates a high-frequency current, and the ultrasonic guide rod at the end transmits vibration energy to the blade tip. The thermal effect of the mechanical vibration breaks the hydrogen bonds in tissue proteins, causing them to denature and coagulate. The mechanical and thermal energy is used to cut, stop bleeding, and coagulate human tissue.

[0003] Traditional electrosurgeries cause severe tissue thermal damage and produce a lot of smoke during surgery. The common gun-type (grip-type) ultrasonic scalpels on the market have a short operating end and a short single cutting distance. Due to the slender cannula structure, there is no way to simply lengthen the working end, so it is impossible to achieve effective clamping force to ensure cutting strength and cannot cut accurately. Secondly, when the movable component is pressed down and the scissors head is clamped, the clamping force cannot be stable and consistent, so the cutting speed cannot be stable and controllable. Utility Model Content

[0004] The purpose of the utility model is to provide a scissor-type ultrasonic surgical instrument with a handle limiting structure, aiming to solve the problems in the prior art that the movable handle tilts left and right when pressed down, affecting the clamping force and cutting speed.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A scissor-type ultrasonic surgical instrument with a handle limiting structure, characterized by comprising:

[0007] A knife bar assembly comprises 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 (140) is arranged at one side of the gripping structure, the gripping structure further comprises a housing, a button arranged on the housing, and an electronic component arranged in the housing and in contact with the button;

[0008] A movable assembly includes a movable bracket, the movable bracket being rotatably connected to the fixed bracket via a rotating shaft, a clamping arm being provided at a first end of the movable bracket, the clamping arm pivoting relative to the blade tip to form a clamping and opening state;

[0009] In which, the movable component includes a second annular handle arranged at the second end of the movable bracket, the second annular handle is provided with a groove or a protrusion, and the side of the holding structure facing away from the first annular handle is provided with a protrusion or groove aligned with the second annular handle.

[0010] The beneficial effects of the present invention are as follows: the scissor-type ultrasonic surgical instrument provided by the present invention is provided with grooves and protrusions or protrusions and grooves at the contact positions of the knife rod assembly and the movable assembly, so that when the two handles gradually approach each other during the use of the ultrasonic surgical instrument, that is, when clamped, the protrusion of the movable assembly is inserted into the groove of the knife rod assembly, or the protrusion of the knife rod assembly is inserted into the groove of the movable assembly. When the movable assembly cannot be pressed down and the forceps head (that is, the clamping arm and the knife tip) is clamped, the clamping force of the forceps head is kept constant, the instrument does not produce unnecessary shaking, thereby achieving a stable and controllable cutting speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic structural diagram of the scissor-type ultrasonic surgical instrument provided by an embodiment of the present utility model when being held by an operator;

[0012] Figure 2 This is a three-dimensional view of a scissor-type ultrasonic surgical instrument provided by an embodiment of the present utility model;

[0013] Figure 3 This is an exploded view of a scissor-type ultrasonic surgical instrument provided by an embodiment of the present utility model;

[0014] Figure 4 This is a schematic diagram of the positions of the scissor-type ultrasonic surgical instrument, torque wrench, and transducer provided in an embodiment of the present utility model;

[0015] Figure 5 This is a front view of the scissor-type ultrasonic surgical instrument provided by an embodiment of the present utility model;

[0016] Figures 6a-6d yes Figure 5 Schematic diagram of various cross sections at the middle BB;

[0017] Figure 7a-7b yes Figure 5 Size markings of convex and concave parts;

[0018] Figure 8 This is a schematic diagram of the structure of the rotating shaft provided by the embodiment of the utility model being assembled on the movable bracket and the fixed bracket Figure 1 ;

[0019] Figure 9 This is a schematic diagram of the structure of the rotating shaft provided by the embodiment of the utility model being assembled on the movable bracket and the fixed bracket Figure 2 ;

[0020] Figure 10 yes Figure 9 Cross-section at AA;

[0021] Figure 11 yes Figure 10 A' in the middle is an enlarged cross-sectional view;

[0022] Figure 12 This is a schematic structural diagram of an embodiment of the present utility model in which the rotating shaft member is not assembled on the movable bracket and the fixed bracket;

[0023] Figure 13 It is a structural schematic diagram of the groove and shallow groove provided by the embodiment of the utility model;

[0024] Figure 14 This is a schematic diagram of the tool tip and the clamping arm provided by the embodiment of the present utility model when they are not clamped;

[0025] Figure 15 This is a schematic diagram of the tool tip and the clamping arm provided by an embodiment of the present utility model when clamped;

[0026] Figure 16 This is a schematic diagram of the internal structure of the gripping structure provided by an embodiment of the present utility model;

[0027] Figure 17 This is a schematic diagram of the assembly of a key provided by an embodiment of the present utility model;

[0028] Figure 18 This is a partial structural diagram of the knife bar assembly provided by an embodiment of the present utility model;

[0029] Figure 19 is a cross-sectional view of a button provided by an embodiment of the present utility model;

[0030] Figure 20 This is a partial structural diagram of an electronic component provided by an embodiment of the present utility model;

[0031] Figure 21 Schematic diagram of a transducer provided by an embodiment of the present invention and three transducer copper rings separated at the front end by insulating plastic in contact with multiple probe groups;

[0032] Figure 22 It is a structural schematic diagram of the elastic needle provided by an embodiment of the utility model being assembled on the needle hole seat.

[0033] In the picture:

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

[0035] 100, blade assembly; 110, waveguide rod; 111, blade tip; 120, fixed bracket; 121, guide stopper; 130, grip structure; 131, button; 1311, base; 1312, curved beam; 1313, connecting structure; 13131, riser; 13132, intermediate body; 132, housing; 1321, recessed structure; 1322, flat baffle; 1323, side panel; 1324 , vertical baffle; 133, electronic components; 1331, fixing seat; 1332, FPC component; 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 will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0040] This embodiment provides a scissor-type ultrasonic surgical instrument, such as Figure 1-Figure 22As shown, the scissor-type ultrasonic surgical instrument 10 includes a blade rod assembly 100 and a movable assembly 200. The blade rod assembly 100 includes a waveguide rod 110, a fixed bracket 120 mounted on the waveguide rod 110, and a gripping structure 130. The blade tip 111 of the waveguide rod 110 is exposed at the first end of the fixed bracket 120, and the gripping structure 130 is disposed at the second end of the fixed bracket 120. The gripping structure 130 includes a first annular handle 140 disposed on one side of the gripping structure 130. The gripping structure 130 also includes a housing 132, a button 131 disposed on the housing 132, and an electronic assembly 133 disposed within the housing 132 and in contact with the button 131. The button 131 is disposed 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 that 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 via a rotating shaft 300. The first end of the movable bracket 210 is provided with a clamping arm 220. The clamping arm 220 pivots relative to the blade tip 111 with the rotating shaft (300) as the center to form a clamping and opening. The clamping arm 220 includes a metal clamp and a tissue gasket mounted 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 convex relative to the base 1311 and exposed to the shell 132. The operator can press or push the center position or both ends of the arc beam 1312 at different angles to activate 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 flexible 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 cutting accuracy. The front part of the first annular handle 140 can be provided with an activation button for adjusting the cutting and coagulation gears.

[0042] See also Figure 5As shown in Figure 6 , preferably, a limiting groove is provided on the side of the housing 132 of the gripping structure 130 away from the first annular handle 140, and a second annular handle 230 is provided on the second end of the movable bracket 210. The second annular handle 230 is provided with a limiting protrusion that aligns with the limiting groove; alternatively, a limiting protrusion (not shown) is provided on the side of the housing 132 away from the first annular handle 140, and the second annular handle 230 is provided with a limiting groove (not shown) that aligns with the limiting groove. The groove and protrusion, or the protrusion and groove, are typically aligned at the contact point between the second annular handle 230 and the gripping structure 130. Elastic plastic is generally installed at the finger contact point between the first and second annular handles 140, 230. The elastic plastic can buffer the reaction force of the clamping force on the fingers, improving the comfort during the operation. The elastic plastic can be a polymer resin, such as PC / ABS plastic. One of the groove and the protrusion is made of a flexible plastic and the other is made of a hard material; or both are made of a hard material; or both are made of a flexible plastic. The hard material is, for example, the same material as the housing. Preferably, the groove or protrusion is integrally formed with the housing or handle to which it is connected.

[0043] 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 shell 132, the limiting protrusion is inserted into the limiting groove. The limiting groove can limit and guide the second annular handle 230 left and right to prevent the second annular handle 230 from shaking or tilting during 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 shell 132, the limiting protrusion is pressed against the limiting groove, which makes it easier for the operator to keep the scissor-type ultrasonic surgical instrument 10 in a clamped state.

[0044] like Figures 6a-6d As shown, the shape of the protrusion can be V-shaped, arc-shaped, trapezoidal, or rectangular, or any combination thereof. Figure 7a-7bThe length of the protrusion is shown as L1, 3mm≤L1≤15mm, for example, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 14.5mm, 15mm. The width of the protrusion is shown as W1, 2mm≤W1≤6mm, for example, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm. The maximum height of the protrusion is shown as H, 1mm≤H≤3mm, for example, 1mm, 1.5mm, 2mm, 2.5mm, 3mm. The length of the corresponding groove is L2, 4mm≤L2≤20mm, for example, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 14.5mm, 15mm, 15.5mm, 16mm, 16.5mm, 17mm, 17.5mm, 18mm, 18.5mm, 19mm, 19.5mm, 20mm. The width of the groove is W2, 3mm≤W2≤7mm, for example, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm. The maximum depth of the groove is D, 1mm≤D≤3mm. For example, 1mm, 1.5mm, 2mm, 2.5mm, 3mm.

[0045] For example, the limiting groove is a V-shaped opening. When the movable assembly 200 is pressed down, the V-shaped notch can guide the second annular handle 230 so that the second annular handle 230 does not tilt left or right, which will not affect the position of the ultrasonic scalpel head tip 111 and the misalignment of the tissue pad, affecting clamping and cutting. In addition, for situations where slow clamping of the tip 111 is required or large-area cutting is required, the movable assembly 200 is usually required to clamp and fit the housing 132 of the shank assembly 100, keep it still, and press and hold the trigger button 131 to continuously trigger it. The cooperation between the limiting protrusion and the limiting groove can make it easier for the operator to maintain such a clamping state without causing unnecessary shaking.

[0046] like Figures 8-11As 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 the corresponding side or both sides of the movable bracket 210. 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. A rotating shaft 300 is placed on each side or both sides. 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, and the second step 320 is inserted into 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. The second step 320 and the fixed bracket 120 rotate around a circular surface, and the rotating shaft 300 and the movable bracket 210 are relatively fixed. 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, with 4 points 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, preventing the rotating shaft 300 from loosening and falling out during the operation of the scissor-type ultrasonic surgical instrument 10. Preferably, there is a gap 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 harsh noises.

[0047] Optionally, in order to ensure the quality of welding and the appearance of welding, laser welding is adopted during welding, argon is used as the shielding gas for blowing, welding is performed by adding welding wire, and after welding, the blackened welding points 400 can be wiped with medical alcohol and then cleaned. For example, 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, the second step 320 and the movable bracket 210 can be laser welded in a full circle along the circumference of the second step 320 to improve the connection stability and prevent long-term violent use. The failure of the welding points 400 will cause the rotation of the shaft 300 to be damaged. This is redundant protection for the shaft 300.

[0048] See also Figure 12 and Figure 13In another embodiment, the rotating shaft 300 is a stepped column comprising a first step 310 of smaller diameter and a second step 320 of larger diameter, which are interconnected. The first step 310 is rotatably inserted into the circular groove of the fixed bracket 120. The outer circumference of the second step 320 is provided with an external thread, and the circular hole of the movable bracket 210 is provided with an internal thread. The second step 320 and the movable bracket 210 are threadedly connected. The end surface of the second step 320, which is away from the first step 310, is provided with a mounting groove 321 for screwing. 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 into the circular hole of the movable bracket 210, which facilitates operation. Optionally, the mounting groove 321 is configured as a square groove to match the shape of the screwdriver end. Alternatively, the mounting groove 321 can also be shaped as other polygons, such as a triangle, a pentagon, or a hexagon. The shape of the mounting groove 321 can also be a plurality of disconnected smaller grooves, which correspond to the corresponding plurality of 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.

[0049] Furthermore, the end surface of the second step 320, facing away from the first step 310, is provided with a plurality of shallow grooves 322 for screw-on positioning and / or weld spot positioning. After the second step 320 is screwed into the circular hole of the movable bracket 210, the second step 320 and the movable bracket 210 can be further welded to improve connection reliability. The shallow grooves 322 facilitate weld spot positioning. In this embodiment, the shallow grooves 322 are configured as cross-shaped shallow grooves, which effectively ensure consistent positioning of the weld points 400 during mass production.

[0050] like Figure 12 As shown, optionally, a guide limit block 121 is provided on the fixed bracket 120, and a limit groove matching the guide limit block 121 is provided on the movable bracket 210. The limit groove clamps the guide limit block 121, and the guide limit block 121 can reduce the shaking of the movable bracket 210 along the length direction. The guide limit block 121 is preferably provided in the middle position of the fixed bracket 120. Further, see Figure 12 The rotating shaft 300 is rotatably disposed through the guide stop 121 and the movable bracket 210. The movable bracket 210 and the rotating shaft 300 are interference-fitted, facilitating assembly. 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 with a clearance fit.

[0051] The first ring handle 140 is the gripping portion for the operator's middle finger, ring finger, and pinky finger, and the second ring handle 230 is the manipulation portion for the operator's thumb. The first ring handle 140 remains stationary, and the thumb presses down and lifts the second ring handle 230 to close and release the scissors' blade tips. Alternatively, the first ring handle 140 is the manipulation portion for the operator's thumb, and the second ring handle 230 is the gripping portion for the operator's middle finger, ring finger, and pinky finger. The first ring handle 140 remains stationary, and the middle finger, ring finger, and pinky finger press down and lift the second ring handle 230 to close and release the scissors' blade tips.

[0052] like Figure 14 and Figure 15 As 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 and the tissue pad are assembled is set at a certain angle. Consequently, the working surface of the tissue pad mounted 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. An angle θ of 1°-5° exists between the two working surfaces of the clamping arm 220 and the blade tip 111 when they initially contact each other. For example, θ can be 1°, 1.5°, 2°, 2.5°, 3°, 3.5°, 4°, 4.5°, or 5°. The angle θ is preferably 2°-3°, including 2° and 3°. In the prior art, when the clamping arm 220 and the blade tip 111 are clamped, the clamping force is easily unevenly distributed. Typically, during clamping, the blade tip 111 requires a certain amount of clamping force, and the main body of the movable bracket 210 is often made of metal, such as aluminum alloy or stainless steel. The handle of the movable support 210 is made of a polymer resin (PC / ABS plastic). When the handle is pressed down to achieve such a high clamping force, both the metal body and the handle of the movable support 210 will deform, which will exacerbate the uneven distribution of the clamping force. When the second ring handle 230 is pressed down, the area of ​​contact between the clamping arm 220 and the blade tip 111 continuously increases, and the clamping force continuously increases. When the second ring handle 230 reaches the limit, the clamping force on the blade tip 111 reaches the required force for surgery. At this point, the distribution of the clamping force between the clamping arm 220 and the blade tip 111 is relatively uniform. In addition, by setting an angle of 1°-5° to compensate for deformation of the movable assembly 200, the material of the second ring handle 230 can be selected from a resin with high elasticity. When the scissor-type ultrasonic surgical instrument 10 clamps thick tissue, the elastic deformation of the second ring handle 230 can absorb the clamping force, preventing excessive clamping force and maintaining a stable clamping force.

[0053] See also Figure 16-Figure 22In this embodiment, the electronic assembly 133 includes an FPC 1332 that contacts the button 131, a PCB 1333 that isolates and supports the FPC 1332, a mounting base 1331 that mounts and secures the FPC 1332 and the PCB 1333, and a plurality of spring pins 1334 mounted on the side of the mounting base 1331 opposite the FPC 1332. The FPC 1332 is a flexible FPC. Its ends are secured to the PCB 1333a and 1333b, respectively, and further secured to the mounting base 1331. The plurality of spring pins 1334 pass through the mounting base 1331, electrically connecting the PCB 1333 and the FPC 1332, and are secured via solder 1337. A key switch 1336 is provided on the PCB 1333, which is configured to contact the button 131. There are at least two key switches 1336. Mounting bracket 1331 serves as a support structure for FPC 1332 and PCB 1333, enhancing their assembly stability. Mounting bracket 1331 is provided with multiple grooves. During assembly, the PCB 1333 assembly at one end of FPC 1332 is inserted through the grooves to secure the PCBA assembly. Spring pins 1334 penetrate holes in mounting bracket 1331, PCB 1333, and FPC 1332, connecting to the FPC 1332 circuitry and securing it with solder 1337. This connects three signal groups: ground, MAX gear position signal, and MIN gear position signal.

[0054] Furthermore, an encryption chip 1335 is mounted on the FPC component 1332 supported on the PCB 1333. This encryption chip 1335 is signal-connected to the FPC component 1332. The encryption chip 1335 is preferably positioned between the two key switches 1336 on the mounting base 1331. This encryption chip 1335 assists in implementing encryption functions, enhancing data acquisition and usage security.

[0055] In this embodiment, two limit plates 1339 are provided on either side of the PCB hard board 1333 for engaging the key switches 1336. Two keys 131 and two key switches 1336 are each provided. Keys 131 include a MAX key and a MIN key, respectively used to activate cutting and coagulation. The encryption chip 1335 is positioned between the two key switches 1336. Limit plates 134 are provided around the sides of the encryption chip 1335, ensuring that the key switches 1336 are positioned between the limit plates 134 and the corresponding limit plates 1339, ensuring a secure installation. The two keys 131 in this embodiment are separate entities, with two completely independent tracks within the housing 132. This means that each key 131 has its own independent track. This allows pressing either key 131 to activate the other, making accidental presses less likely. 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 arranged planar baffles 1322 ), which will not cause the button 131 to get stuck when pressed.

[0056] Optionally, the spring pins 1334 are divided into three groups, each of which is electrically connected to a transducer copper ring 135 having three different diameters, for connecting three sets of electrical signals on the transducer copper ring 135. The spring pins 1334 connected to the transducer copper ring 135 of the same diameter are grouped together, with each group of spring pins 1334 containing at least two. This prevents slight misalignment during installation that could cause signal dropouts, improves fault tolerance, reduces the requirements for machining accuracy, reduces the possibility of dropouts due to improper operator operation, and significantly reduces the possibility of high-frequency vibrations causing resonance in the spring pins 1334, leading to momentary disconnection of the electrical signal. Preferably, each spring pin 1334 is secured in a pinhole seat 1338 integrally formed with and protruding from the fixing seat 1331, ensuring that the spring pins 1334 are securely mounted.

[0057] When the scissor-type ultrasonic surgical instrument 10 and the transducer 30 are assembled, the transducer 30 is connected to the shank assembly 100 via mechanical threads. After the transducer 30 passes through the housing 132 and is then connected to the shank assembly 100 via threads, 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, with insulating plastic 136 provided between adjacent transducer copper rings 135. When the transducer 30 and the spring pins 1334 abut, the three transducer copper rings 135 synchronously contact the three groups of spring pins 1334 in a one-to-one correspondence, thereby reducing the possibility of the spring pins 1334 resonating during high-frequency vibration of the ultrasonic instrument and causing signal disconnection. The mechanical threaded connection between the shank assembly 100 and the transducer 30 and the signal connection between the key signals of the shank 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. These three signals, ground, MAX, and MIN, correspond to three different diameter transducer copper rings 135 at the front end of transducer 30. When transducer 30 is connected and screwed into the arbor, the concentric transducer copper rings 135 also make synchronous contact with the spring pins 1334, achieving a simple synchronous connection.

[0058] When the scissor-type ultrasonic surgical instrument 10 is connected to the transducer 30, the torque wrench 20 acts on the fixing bracket 120 to tightly connect the scissor-type ultrasonic surgical instrument 10 to the transducer 30. In this embodiment, the effective length of the fixing bracket 120 can be 90 mm or 170 mm for different uses.

[0059] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A scissor-type ultrasonic surgical instrument with a handle limiting structure, 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) is pivotally rotated relative to the knife tip (111) with the rotating shaft (300) as the center; Wherein, the movable component (200) includes a second annular handle (230) arranged at the second end of the movable bracket (210), and the second annular handle (230) is provided with a groove or a protrusion, and the side of the holding structure (130) facing away from the first annular handle (140) is provided with a protrusion or a groove that aligns with the second annular handle (230) when clamped.

2. The scissor-type ultrasonic surgical instrument according to claim 1, characterized in that: The second ring-shaped handle (230) and the holding structure (130) are respectively provided with a groove and a protrusion, or a protrusion and a groove, at positions where they contact each other.

3. The scissor-type ultrasonic surgical instrument according to claim 2, characterized in that: The first ring-shaped handle (140) and the second ring-shaped handle (230) are both installed with elastic plastic.

4. The scissor-type ultrasonic surgical instrument according to claim 3, characterized in that: One of the groove and the protrusion is made of elastic plastic, and the other is made of hard material; or both are made of hard material; or both are made of elastic plastic.

5. The scissor-type ultrasonic surgical instrument according to claim 2, characterized in that: The protrusion is V-shaped, arc-shaped, trapezoidal, or rectangular.

6. The scissor-type ultrasonic surgical instrument according to claim 2, characterized in that: The length of the protrusion is L1, 3mm≤L1≤15mm, the width of the protrusion is W1, 2mm≤W1≤6mm, and the maximum height of the protrusion is H, 1mm≤H≤3mm; the corresponding length of the groove is L2, 4mm≤L2≤20mm, the width of the groove is W2, 3mm≤W2≤7mm, and the maximum depth of the groove is D, 1mm≤D≤3mm.

7. 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, wherein 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 inserted into the circular hole of the movable bracket (210) and is interference-fitted with the circular hole of the movable bracket (210); or the second step (320) is threadedly connected to the movable bracket (210).

8. The scissor-type ultrasonic surgical instrument according to any one of claims 1 to 6, 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 of 1°-5°.

9. 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).

10. The scissor-type ultrasonic surgical instrument according to any one of claims 1 to 6, characterized in that: The button (131) is arranged at the front part of the first ring-shaped handle (140), and the button (131) is in an I-shaped structure. The I-shaped structure includes a base (1311), an arc-shaped beam (1312) arranged to protrude outward 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 convex block (13111) with a flat end, and the convex block (13111) contacts the electronic component (133). The arc-shaped beam (1312) is exposed outside the housing (132) to facilitate finger operation.

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