Tool for testing driving force of ultrasonic knife head

Abstract

The invention discloses an ultrasonic knife head driving force testing tool, and belongs to the technical field of force measuring tools, the ultrasonic knife head driving force testing tool comprises a rack and a testing head located at the tail end of a knife rod of an ultrasonic knife, the testing head comprises a joint part and an overhead part, the joint part is matched with the end of the cutter bar in an openable and closable mode and forms a containing space, the overhead part is fixed to the coaxial position of the cutter bar, a three-axis pressure probe array is fixedly installed in the containing space of the overhead part and composed of a first pressure probe, a second pressure probe and a third pressure probe, and the first pressure probe, the second pressure probe and the third pressure probe are arranged in the containing space. Therefore, the contact type monitoring of the joint part in the vertical, horizontal and depth directions is realized. Through the design of the testing head, the joint part replaces a blade and a blade fastener to serve as a load to be installed at the end of the cutter bar, a real use scene is simulated, the multi-direction driving force of the ultrasonic cutter to the cutter head can be detected, and the detection result is closer to the actual output value of the ultrasonic cutter.

Description

Technical Field

[0001] The present invention belongs to the technical field of force measurement tools, and particularly relates to a test fixture for the driving force of an ultrasonic scalpel head. Background Art

[0002] An ultrasonic scalpel is a medical device that uses ultrasonic technology for cutting and coagulation, and is widely used in surgical operations and tumor treatments. When the ultrasonic scalpel cuts, there is less bleeding, less damage to surrounding tissues, and faster postoperative recovery. The reason is that the ultrasonic scalpel converts the high-frequency electrical signal provided by the main unit into an ultrasonic signal (mechanical vibration) through the transducer handle, and this high-frequency vibration is used for cutting and hemostasis.

[0003] The existing Chinese utility model patent with the publication number CN217424620U discloses a test fixture for the driving force of an ultrasonic scalpel head. One end of a tension sensor is connected to the inner sleeve of the slender body through a floating connecting piece, and the other end of the tension sensor is connected with a fixed connecting piece. The pulling force between the inner sleeve and the outer sleeve can be measured through the tension sensor, so as to realize the detection of the driving force of the scalpel head. However, in actual use, the slender body of the ultrasonic scalpel does not only have an axial driving force, but can release driving forces in multiple directions. Due to this fixing method, only the axial driving force released by the slender body of the ultrasonic scalpel can be detected, and the driving forces in other directions of the slender body will be transmitted to the sleeve and absorbed, and cannot be detected. Therefore, there is a large deviation between the detected value and the actual value. In view of this, a test fixture for the driving force of an ultrasonic scalpel head is provided. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned disadvantages of the prior art and provide a test fixture for the driving force of an ultrasonic scalpel head.

[0005] The technical solution adopted to solve the above technical problem is as follows: A test fixture for the driving force of an ultrasonic scalpel head, including a frame, and further including: A clamping bracket fixed on the flat surface of the frame, the clamping bracket has the ability to move horizontally and open and close, and the clamping bracket is used to horizontally fix and press the ultrasonic scalpel placed thereon; A test head located at the end of the knife rod of the ultrasonic scalpel, the test head includes a joint part and an overhead part, the joint part is openably adapted to the end of the knife rod and forms an accommodation space, the overhead part is fixed at the coaxial position of the knife rod, and a three-axis pressure probe array is fixedly installed in the accommodation space of the overhead part. The three-axis pressure probe array is composed of a pressure probe one, a pressure probe two, and a pressure probe three to realize contact monitoring of the joint part in the vertical, horizontal, and depth directions; End frame, the end frame is fixed to the end of the clamping frame, and the end frame is connected to the overhead part through a screw and a self-locking nut to adjust the vertical position of the triaxial pressure probe array.

[0006] Furthermore, the clamping frame includes a slide rail, on which a first fork is slidably installed, and a second fork is fixedly installed at the end of the slide rail. The first fork can be pushed and extruded towards the second fork by a pushing member.

[0007] Through the above technical solution, the slide rail plays a guiding role when the second fork slides, pulling apart the distance between the first fork and the second fork. The second fork is fixed and has a U-shaped opening facing upwards. The first fork also has a U-shaped opening facing upwards. The ultrasonic scalpel can be horizontally placed on the two U-shaped openings, and then the ultrasonic scalpel can be quickly fixed radially by translating and pressing the first fork.

[0008] Furthermore, the pushing member is composed of a crank and a push rod. The middle of the crank is hinged to the end of the push rod. A cylinder is hingedly installed at the distal end of the push rod. A guide seat is sleeved outside the cylinder and installed on the slide rail. The cylinder is detachably connected to the first fork through a bolt. A limit seat is arranged below the crank, and the limit seat and the crank are detachably inserted through a pin rod.

[0009] Through the above technical solution, the second fork needs to be fixed after pressing the ultrasonic scalpel to prevent the ultrasonic scalpel from loosening. When operating the second fork, the lower end of the crank is hinged to the frame at the end of the slide rail. Pushing the upper end of the crank to horizontally slide the cylinder can achieve the second fork translating and pressing the ultrasonic scalpel. After pressing, the limit hole on the crank is aligned with the horizontal hole on the limit seat, and the pin rod can be inserted between the limit hole and the horizontal hole to fix the crank, thereby locking the position of the second fork.

[0010] Furthermore, the joint part includes a connecting frame, on which a first clamp and a second clamp are hingedly installed. The first clamp and the second clamp form an arc-shaped inner wall adapted to the tool bar at the end close to the tool bar. A clamping clip is installed on the connecting frame. The clamping clip is in a vertical position to press the first clamp and the second clamp against the end of the tool bar. The clamping clip can swing 90 degrees to release the first clamp and the second clamp.

[0011] Through the above technical solution, the first clamp and the second clamp are sleeved on one end of the tool bar along the radial direction, and the clamping clip is used for clamping to ensure stable contact. During the test, when the tool bar moves radially, the joint part can move synchronously. When disassembling, the clamping clip can rotate 90 degrees around the rotation center at the left top, and the clamping clip can swing above the first clamp and the second clamp to complete the detachment and release, and the disassembly action is fast.

[0012] Further, the crank has a plug rod at the position of the through hole of the blade groove on the tool bar. The first clamp and the second clamp are provided with semi-circular grooves corresponding to the through hole of the blade groove. The two semi-circular grooves can form a circular jack, and the plug rod can displace vertically through the jack and insert into the through hole of the blade groove.

[0013] Through the above technical solution, the blade groove of the tool bar is a rectangular groove along the axis, and a circular through hole is provided at the bottom of the groove to avoid cracking here. After the first clamp and the second clamp are sleeved on the end of the tool bar, the plug rod is inserted into the through hole position of the blade groove from top to bottom, and at the same time, it is clamped with the first clamp and the second clamp respectively through the semi-circular grooves to prevent the first clamp and the second clamp from sliding along the axis of the tool bar and avoid insufficient measurement accuracy caused by relative displacement.

[0014] Further, the joint part further includes a transmission part. The transmission part has a longitudinal sliding frame. A rocker arm is slidably installed at the transverse opening of the longitudinal sliding frame. One end of the rocker arm away from the longitudinal sliding frame is rotatably connected to the connecting frame. The top end of the plug rod is fixedly connected to the bottom end of the longitudinal sliding frame. A connecting shaft is coaxially arranged at the rotational connection position of the clamp and the connecting frame. A steel wire rope is wound around the middle of the connecting shaft. A middle shaft is rotatably installed near the connecting shaft of the rocker arm, and a bushing sleeved outside the steel wire rope is installed in the middle of the middle shaft.

[0015] Through the above technical solution, the clamp is rotatably installed through the connecting shaft. The steel wire rope is wound counterclockwise outside the connecting shaft. The outer wall of the steel wire rope is in frictional contact with the middle shaft through the bushing. Pulling the steel wire rope upward can drive the clamp to rotate counterclockwise by 90 degrees to disengage from the first clamp and the second clamp. When the steel wire rope rubs against the middle shaft and moves upward, the longitudinal sliding frame will move upward and disengage from the tool bar, completing the separation drive of the clamp and the plug rod in different directions but at the same time.

[0016] Further, a roller is installed at one end of the longitudinal sliding frame close to the connecting frame. A longitudinal opening is provided at the corresponding position of the connecting frame for the roller. The middle shaft is lapped under the middle part of the longitudinal sliding frame. A stabilizing rod is rotatably installed at the end of the middle shaft. One end of the stabilizing rod away from the middle shaft is hinged to the connecting frame.

[0017] Through the above technical solution, the plug rod needs to move vertically up and down. Therefore, the rolling of the roller in the longitudinal opening is utilized. The inner wall of the longitudinal opening can play a guiding role for the end of the longitudinal sliding frame. The stabilizing rod can be telescopic and is located on both sides of the longitudinal sliding frame to provide anti-torsion support when the longitudinal sliding frame moves upward and ensure the vertical stability of the sliding of the longitudinal sliding frame.

[0018] Further, a through tube cooperating with the steel wire rope is installed at the top of the connecting frame. One end of the steel wire rope away from the connecting shaft is installed with an attracting block. A sleeve is sleeved outside the attracting block. An electromagnet is installed at one end of the sleeve away from the attracting block. A top plate is fixedly installed outside the sleeve. The top plate is detachably installed at the top end of the screw rod through a screw cap on the bottom surface.

[0019] Through the above technical solution, the through-tube guides the steel rope, and uses the magnetic force generated by the energized electromagnet to attract the attracting block to provide pulling power for the steel rope. It can quickly disassemble the joint during the installation and debugging stages. During the detection, the joint can be separated from the tool bar by energizing the electromagnet to simulate the situation of the blade falling off the tool bar and test whether the anti-detachment function of the ultrasonic tool with the blade detachment detection function is normal.

[0020] Further, a vertical light hole is provided at the position corresponding to the screw rod in the overhead part. An installation table is provided at one end of the overhead part located inside the accommodation space. All four pressure probes one, one pressure probe two, and two pressure probes three are fixedly installed on the installation table. A circular gap is formed when the connecting sleeve is sleeved outside the overhead part.

[0021] Through the above technical solution, the overhead part can slide up and down along the screw rod. With the fixation of the clamping frame, because the ultrasonic tools have different models, the tool bars will have different heights after being clamped. After the joint is fixed to the tool bar, it is necessary to adjust the height of the overhead part to ensure that the three-axis pressure probe array is centered in the accommodation space, so as to ensure that pressure probe one, pressure probe two, and pressure probe three can all contact the inner wall of the accommodation space for multi-directional detection. To prevent and reduce interference, the connecting sleeve is sleeved in the middle section of the overhead part and a circular gap is left. Before the joint is installed on the tool bar, it can form an integral body with the overhead part, avoiding being scattered and inconvenient for installation, and can also prevent the loss of parts. After the joint is installed on the tool bar, the circular gap can prevent the fixed overhead part from affecting the free movement of the joint along with the tool bar and prevent the detected data from being less than the actual value.

[0022] Further, pressure probe one includes an outer ring and a pressure sensor arranged coaxially. A compensation gap is formed between the outer ring and the pressure sensor. A support frame is installed in the compensation gap. The support frame is in direct contact with the inner wall of the outer ring and the outer wall of the pressure sensor. A sliding bearing is installed at one end of the pressure sensor located inside the outer ring. Pressure probe two and pressure probe three have the same structure as pressure probe one except for the installation positions.

[0023] Through the above technical solution, the support frame is an elastic structure and can be deformed under pressure. Cooperating with the compensation gap, the pressure sensor can slide with two degrees of freedom inside the outer ring, enabling the pressure sensor to detect the force perpendicular to the end face of the pressure sensor. The force parallel to the end face of the pressure sensor will be offset by the sliding of the pressure sensor, ensuring the installation stability during long-term detection and reducing the influence of multi-degree-of-freedom movement on the detection accuracy through adaptive horizontal sliding.

[0024] The beneficial effects of the present invention are as follows: (1)Through the design of the test head, the joint replaces the blade and the blade fastener and is mounted at the end of the tool bar as a load. The joint is driven by the tool bar to move at multiple angles through radial and axial locking, simulating the real use scenario. The driving force of the tool bar on the joint is converted into the displacement of the joint and then transmitted to the position of the triaxial pressure probe array to be converted into an electrical signal, so that the driving force of the ultrasonic knife on the tool head in multiple directions can be detected, and the detection result is closer to the actual output value of the ultrasonic knife; (2)Through the optimization of the test head, a flexible steel rope is used as the unlocking transmission part. During the test, it does not affect the normal progress and accuracy range of the driving force test. When detecting the anti-detachment function of the ultrasonic knife, the joint can be unlocked radially and axially by pulling the steel rope at the same time, so that the joint can be detached from the tool bar during the test, truly simulating the accidental scenario of the blade and the blade fastener falling off during use, and the practicability is stronger. Brief Description of the Drawings

[0025] Figure 1 is the structural diagram of the first perspective of the present invention; Figure 2 is the enlarged schematic diagram of the middle part structure of the frame of the present invention; Figure 3 is the assembly schematic diagram among the clamping frame, the test head and the ultrasonic knife of the present invention Figure 1 ; Figure 4 is the assembly schematic diagram among the clamping frame, the test head and the ultrasonic knife of the present invention Figure 2 ; Figure 5 is the structural schematic diagram of the test head in the unfolded state of the present invention; Figure 6 is the structural schematic diagram of the test head in the retracted state of the present invention; Figure 7 is the disassembled schematic diagram of the test head of the present invention; Figure 8 is the schematic diagram of the connecting frame, the transmission part, the clamp and the plug pin of the test head of the present invention; Figure 9 is the disassembled schematic diagram of the test head in the retracted state of the present invention; Figure 10 is the structural schematic diagram among the connecting frame, the driving part and the transmission part and at position a of the present invention; Figure 11 is the sectional schematic diagram of the first pressure probe of the present invention.

[0026] Reference numerals: 1, ultrasonic scalpel; 11, tool bar; 12, blade groove; 2, clamping bracket; 21, fork bracket I; 22, fork bracket II; 23, slide rail; 24, pressing member; 25, limit seat; 3, frame; 4, joint portion; 41, connecting bracket; 411, longitudinal opening; 412, support ear; 413, hinge seat; 414, transfer hole; 42, clamp I; 421, clamping hole; 422, pin; 43, clamp II; 44, clip; 441, connecting shaft; 45, insertion rod; 46, transmission member; 461, longitudinal sliding frame; 462, rocker arm; 463, central shaft; 464, sub-arm; 465, stabilizing rod; 466, transverse opening; 467, roller; 468, bushing; 47, steel wire rope; 471, sleeve; 472, suction block; 473, electromagnet; 48, accommodation space; 49, insertion hole; 5, overhead portion; 51, mounting table; 52, annular gap; 6, end frame; 61, screw; 62, top plate; 63, nut; 7, pressure probe I; 71, outer ring; 72, pressure sensor; 73, compensation gap; 74, support frame; 75, sliding bearing; 8, pressure probe II; 9, pressure probe III. Detailed implementation manners

[0027] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] As Figure 1 - Figure 11 shown, this embodiment provides a test tool for the driving force of the ultrasonic scalpel head, including a frame 3, which is formed by combining aluminum alloy rods and has a flat substrate in the middle for installing other components; During use, in order to solve the problems existing in the existing equipment, the multi-directional driving forces of the ultrasonic scalpel 1 are measured separately. The axial driving force improves the cutting ability, and the radial driving force is used to make the blade move at multiple angles to break up the tissues around the blade. Therefore, the driving forces in multiple angles all have their expected effects and minimum indicators. To ensure that the detection is closer to the actual value, a specific configuration is provided: Regarding the clamping bracket 2, referring to Figure 1 and Figure 2 , the clamping bracket 2 is fixed on the flat surface in the middle of the frame 3, and multiple clamping brackets can be arranged side by side to provide multiple detection stations. When one ultrasonic scalpel 1 is being detected, other ultrasonic scalpels 1 can be disassembled and assembled, making full use of the detection time and reducing the ineffective waiting time during detection. The clamping bracket 2 has the ability to open and close horizontally. When it is opened, the ultrasonic scalpel 1 can be placed, and when it is closed, the ultrasonic scalpel 1 is pressed tightly, fixing the ultrasonic scalpel 1 in the horizontal position and waiting for the driving force detection; Regarding the test head, referring to Figure 3 , Figure 5 , Figure 6And Figure 7 , the test head is located at the end of the tool bar 11 of the ultrasonic scalpel 1. Among them, the joint 4 is operably adapted to the end of the tool bar 11, can be fixedly connected to the tool bar 11, replaces the blade as the load of the tool bar 11, simulates a more realistic working scenario, and forms an accommodation space 48 for installing a driving force detection sensor. Specifically, the overhead part 5 is fixed at the coaxial position of the tool bar 11, and a triaxial pressure probe array is fixedly installed in the accommodation space 48. The triaxial pressure probe array is composed of a first pressure probe 7, a second pressure probe 8 and a third pressure probe 9. The first pressure probe 7, the second pressure probe 8 and the third pressure probe 9 respectively contact the inner wall of the accommodation space 48 and respectively detect the driving force conditions in the left-right direction, the front-back direction and the vertical direction. Compared with only detecting the driving force in the axial direction of the tool bar 11, this multi-angle detection of the driving force is more comprehensive and closer to the actual situation; Regarding the end frame 6, refer to Figure 4 And Figure 5 , the end frame 6 is fixed to the end of the clamping frame 2. Specifically, it is close to one end of the tool bar 11. The end frame 6 is connected to the overhead part 5 through a screw 61 and a self-locking nut. Loosen the self-locking nuts on the upper and lower sides of the overhead part 5 to make them away from the overhead part 5, and then the height of the overhead part 5 can be adjusted. Furthermore, the vertical position of the triaxial pressure probe array can be adjusted. After that, reverse the self-locking nut to press the overhead part 5 to complete the fixation, which is convenient for it to be coaxial with the tool bar 11 so as to be inserted and centered with the joint 4 to complete the centered contact.

[0029] In a further embodiment, refer to Figure 3 And Figure 4 , the clamping frame 2 includes a slide rail 23. A first fork 21 is slidably installed on the slide rail 23. When the distance between the first fork 21 and the second fork 22 is pulled apart, the slide rail 23 plays a guiding role when the first fork 21 slides. A second fork 22 is fixedly installed at the end of the slide rail 23. The first fork 21 can be pushed and squeezed towards the second fork 22 by a pushing member 24. The second fork 22 is fixed and has a U-shaped opening facing upward. The first fork 21 also has a U-shaped opening facing upward. The ultrasonic scalpel 1 can be horizontally placed in the two U-shaped openings for centered limiting, and then the ultrasonic scalpel 1 is translated and pressed by the second fork 22 to realize the rapid radial fixation of the ultrasonic scalpel 1; Among them, refer to Figure 4, disclose a specific configuration of the driving structure of the fork support 21. The pressing member 24 is composed of a crank and a push rod. The middle part of the crank is hinged to the end of the push rod. A cylinder is hinged and installed at the distal end of the push rod. The lower end of the crank is hinged to the frame 3 at the end of the slide rail 23. Pushing the upper end of the crank slides the cylinder horizontally. A guide seat is sleeved outside the cylinder and installed on the slide rail 23. The cylinder is detachably connected to the fork support 21 through bolts. A limit seat 25 is arranged below the crank. The limit seat 25 and the crank are detachably inserted through a pin rod, which can realize the translation and pressing of the fork support 22 on the ultrasonic knife 1. After pressing, the limit hole on the crank is aligned with the horizontal hole on the limit seat 25, and the pin rod can be inserted between the limit hole and the horizontal hole to fix the crank, thereby realizing the position locking of the fork support 22. Similarly, the crank and the push rod can be replaced with a horizontally arranged hydraulic cylinder, which can perform automatic telescoping and limiting of the fork support 21. The automated hydraulic cylinder operation is faster, but an additional hydraulic drive device is required, resulting in a higher cost. It can also be replaced with other forms of linear power sources to drive the horizontal movement and self-locking of the fork support 21, which will not be elaborated here.

[0030] In a further embodiment, referring to Figure 7 and Figure 8 , to achieve faster disassembly and assembly of the joint portion 4 and the tool bar 11, a specific configuration is provided. The joint portion 4 includes a connecting frame 41. A transfer hole 414 is vertically opened in the middle of the connecting frame 41. Referring to Figure 9 , vertical pin columns 422 are installed at one end of the clamping bracket 42 and the clamping bracket 43 away from the tool bar 11 for hinged installation with the transfer hole 414. The ends of the clamping bracket 42 and the clamping bracket 43 close to the tool bar 11 form an arc-shaped inner wall adapted to the tool bar 11. When the clamping bracket 42 and the clamping bracket 43 approach each other, a cylindrical tube-like structure can be formed to fit around the circumferential side wall of the tool bar 11. The connecting frame 41 is provided with an ear 412 at a position above the middle of the clamping bracket 42 and the clamping bracket 43. A U-shaped clamp 44 is rotatably installed in the middle of the ear 412. The clamp 44 is clamped on the outside of the clamping bracket 42 and the clamping bracket 43 from top to bottom for clamping, and hemispherical protrusions are provided at both ends of the clamp 44, while clamping holes 421 are provided in the middle of the clamping bracket 42 and the clamping bracket 43 to cooperate with the hemispherical protrusions, ensuring the firm contact between the joint portion 4 and the tool bar 11. At the same time, when the clamp 44 swings counterclockwise by 90 degrees, it can rotate above the clamping bracket 42 and the clamping bracket 43 to release the two; However, after coaxial sleeving, the axial driving force of the tool bar 11 can only be transmitted by the friction force between the clamping bracket 42 and the clamping bracket 43 and the outer wall of the tool bar 11. Once coaxial sliding occurs, the driving force transmission will be lost, reducing the detection accuracy. Referring to Figure 8 and Figure 9, the blade groove 12 of the tool shank 11 is an axially rectangular groove, and a circular through-hole is provided at the bottom of the groove to avoid cracking at this position. Therefore, the connecting bracket 41 is provided with an inserting rod 45 at the through-hole position of the blade groove 12 of the tool shank 11. The inserting rod 45 is a cylinder with a vertically designed axis. After the clamping part one 42 and the clamping part two 43 are sleeved on the end of the tool shank 11, semi-circular grooves are provided at the positions of the clamping part one 42 and the clamping part two 43 corresponding to the through-hole of the blade groove 12. In this way, after the clamping part one 42 and the clamping part two 43 are closed, the two semi-circular grooves can form a circular jack 49, and the inserting rod 45 can displace vertically through the jack 49 and insert into the through-hole of the blade groove 12. The inserting rod 45 is inserted into the through-hole position of the blade groove 12 from top to bottom, and at the same time, it is respectively clamped with the clamping part one 42 and the clamping part two 43 through the semi-circular grooves, preventing the clamping part one 42 and the clamping part two 43 from sliding along the axis of the tool shank 11 and avoiding insufficient measurement accuracy caused by relative displacement; The axial fixation is achieved through the clamp 44 in cooperation with the clamping part one 42 and the clamping part two 43, and the radial fixation is achieved through the inserting rod 45 in cooperation with the clamping part one 42 and the clamping part two 43. In this way, the multi-directional driving force of the tool shank 11 can be completely transmitted to the joint part 4. Furthermore, the joint part 4 can move at multiple angles relative to the overhead part 5, and then act on the triaxial pressure probe array to be converted into the electrical signal of the triaxial pressure probe array, completing the detection of the multi-angle driving force. It should be noted that, to avoid the assembly gap between the triaxial pressure probe array and the inner wall of the accommodation space 48 affecting the conversion of displacement and electrical signal, an interference fit installation method is adopted. Specifically, it is achieved by reducing the inner diameter of the accommodation space 48. The height of the accommodation space 48 is less than the distance between the end faces of the upper and lower pressure probes three 9, the depth of the accommodation space 48 is less than the distance that the pressure probe two 8 extends into the accommodation space 48, and the width of the accommodation space 48 is less than the distance between the end faces of the two pressure probes one 7 on both sides. That is, when the clamping part one 42 and the clamping part two 43 approach each other and are tightened by the clamp 44, the inner wall of the accommodation space 48 formed by the clamping part one 42 and the clamping part two 43 will generate a pre-tightening force on the triaxial pressure probe array. Before measurement, the triaxial pressure probe array is first zeroed, and then the driving force measurement experiment is carried out, which can eliminate the influence of the assembly gap on the detection accuracy. Similarly, other methods of applying a pre-tightening force to the triaxial pressure probe array to eliminate the assembly gap, such as pushing the probes of the triaxial pressure probe array towards the inner wall of the accommodation space 48 by a certain distance after assembly and the implementation structure, can be used as a direct replacement for this solution and will not be elaborated here.

[0031] Refer to Figure 8 and Figure 10, a specific driving structure for the clip 44 and the insertion rod 45 is provided to drive the clip 44 to rotate counterclockwise and the insertion rod 45 to move upward. The joint portion 4 further includes a transmission member 46. The transmission member 46 has a longitudinal sliding frame 461, which is a long strip structure. The insertion rod 45 is fixed to the bottom end of the longitudinal sliding frame 461. A transverse opening 466 is provided at the position where the insertion rod 45 is installed on the longitudinal sliding frame 461 for sliding connection with the upper end of the rocker arm 462. An assembly hole is provided at one end of the rocker arm 462 away from the longitudinal sliding frame 461 for sleeving outside the support ear 412 and being assembled and connected with the connecting frame 41. A coupling shaft 441 is coaxially arranged at the rotational connection between the rocker arm 462 and the connecting frame 41 where the clip 44 is located. At this time, the support ear 412 is designed in a shape with a hollow through hole for installing the coupling shaft 441. A steel cable 47 is wound around the middle of the coupling shaft 441. The steel cable 47 is wound counterclockwise outside the coupling shaft 441. A shorter auxiliary arm 464 extends from the rocker arm 462 near the coupling shaft 441. A middle shaft 463 is rotatably installed at the position of the auxiliary arm 464. The middle shaft 463 is lapped below the longitudinal sliding frame 461. And a bushing 468 sleeved outside the steel cable 47 is installed in the middle of the middle shaft 463. The inner wall of the bushing 468 is in frictional contact with the outer wall of the steel cable 47. In this way, when it is necessary to drive the clip 44 to rotate counterclockwise and the insertion rod 45 to move upward, only by pulling the steel cable 47, the clip 44 can be driven to rotate counterclockwise by 90 degrees to disengage from the clamping jaw one 42 and the clamping jaw two 43. At the same time, the steel cable 47 moves upward to drive the middle shaft 463 to move upward through the frictional force with the bushing 468, so that the longitudinal sliding frame 461 drives the insertion rod 45 to move upward to disengage from the tool bar 11. Because the steel cable 47 and the bushing 468 are in frictional contact, the steel cable 47 can be wound around the outside of the coupling shaft 441 for multiple turns, and sufficient steel cable 47 is reserved below the middle shaft 463 to ensure that there is sufficient length of the steel cable 47 to complete the driving actions of the clip 44 and the insertion rod 45, and to prevent the steel cable 47 from being completely straightened before the clip 44 swings or the insertion rod 45 moves upward to complete.

[0032] The insertion rod 45 needs to move vertically up and down. Therefore, referring to Figure 8, a roller 467 is installed at one end of the longitudinal sliding frame 461 close to the connecting rod 41. A longitudinal opening 411 is formed in the connecting rod 41 at the position corresponding to the roller 467. The roller 467 is installed in the longitudinal opening 411 and there are at least two rollers, which can respectively contact the two side walls of the longitudinal opening 411. By using the rolling of the roller 467 in the longitudinal opening 411, the inner wall of the longitudinal opening 411 can play a guiding role in the end of the longitudinal sliding frame 461. The central shaft 463 is lapped and arranged in the middle of the lower side of the longitudinal sliding frame 461. A clamping groove cooperating with the central shaft 463 is provided in the middle of the lower side of the longitudinal sliding frame 461. When the steel rope 47 moves upward, the central shaft 463 can be driven to move upward through the bushing 468, and the upward acting force is transmitted to the middle of the lower side of the longitudinal sliding frame 461. At the same time, the rocker arm 462 will also be driven to swing when the central shaft 463 moves upward, and the upper end of the rocker arm 462 is slidably lapped with the end of the longitudinal sliding frame 461 away from the roller 467, so that another upward acting force can be applied to the end of the longitudinal sliding frame 461. Two scattered acting points simultaneously apply an upward acting force to the longitudinal sliding frame 461, and one of the acting points is also directly above the inserting rod 45, which can ensure that there is sufficient driving force to drive the inserting rod 45 to move upward and ensure smooth detachment. At the same time, a stabilizing rod 465 is rotatably installed at the end of the central shaft 463. The stabilizing rod 465 can be telescopic and is located on both sides of the longitudinal sliding frame 461. A hinge seat 413 is rotatably installed at one end of the stabilizing rod 465 away from the central shaft 463. The hinge seat 413 is fixed to the middle side wall of the connecting rod 41. The stabilizing rod 465 can provide anti-torsion support when the longitudinal sliding frame 461 moves upward, ensuring the vertical stability of the sliding of the longitudinal sliding frame 461.

[0033] In a further embodiment, referring to Figure 10 , a through cylinder cooperating with the steel rope 47 is installed at the top of the connecting rod 41. The through cylinder guides the steel rope 47 to prevent the middle section of the steel rope 47 from being wound around other parts. An attracting block 472 is installed at one end of the steel rope 47 away from the connecting shaft 441. A sleeve 471 is sleeved outside the attracting block 472. An electromagnet 473 is installed at one end of the sleeve 471 away from the attracting block 472. The attracting block 472 is attracted by the magnetic force generated by the energization of the electromagnet 473, providing a pulling force for unlocking the joint 4 of the steel rope 47. The rapid disassembly of the joint 4 can be carried out during the installation and debugging stages. A top plate 62 is fixedly installed outside the sleeve 471 to provide an installation position for the sleeve 471. A rotary cap 63 is rotatably installed on the bottom surface of the top plate 62. The rotary cap 63 is detachably installed at the top end of the screw rod 61, enabling rapid disassembly and fixing. Similarly, when the electromagnet 473 is damaged or the electromagnet 473 is not installed, the middle section of the steel rope 47 can be directly manually pulled when needed to provide the unlocking driving force for the joint 4. During the detection, the joint 4 can be separated from the tool bar 11 by energizing the electromagnet 473 or directly pulling the steel rope 47, simulating the situation of the blade falling off the tool bar 11, and testing whether the anti-detachment function of the ultrasonic knife 1 with the blade falling off detection function is normal.

[0034] In a further embodiment, referring toFigure 9 , a vertical smooth hole is provided at the position corresponding to the screw rod 61 of the overhead part 5. The overhead part 5 can slide up and down along the screw rod 61. With the fixation of the clamping frame 2, due to different models of the ultrasonic scalpel 1, the height of the tool rod 11 will be different after being clamped. After the joint part 4 is fixed to the tool rod 11, it is necessary to adjust the height of the overhead part 5 to ensure that the triaxial pressure probe array is centered in the accommodation space 48, so as to ensure that the pressure probe one 7, the pressure probe two 8 and the pressure probe three 9 can all contact the inner wall of the accommodation space 48 for multi-directional detection. At the same time, an installation platform 51 is provided at one end of the overhead part 5 located inside the accommodation space 48. The installation platform 51 provides the required installation positions. Specifically, there can be three directions and seven installation positions, among which four pressure probes one 7, one pressure probe two 8 and two pressure probes three 9 can be installed. And the paired design of the pressure probe one 7 and the pressure probe three 9 can avoid the torsion or even detachment of the joint part 4 caused by uneven force. Moreover, to prevent and reduce interference, the connecting frame 41 is sleeved outside the overhead part 5 to form an annular gap 52. The setting of the annular gap 52 makes the joint part 4 and the overhead part 5 form a movable whole, which avoids being scattered and inconvenient to install before installation and preparation, and can also prevent the loss of parts. After the joint part 4 is installed on the tool rod 11, the annular gap 52 can prevent part of the driving force of the tool rod 11 from being directly transmitted to the fixed overhead part 5 and offset, ensuring that the driving force of the tool rod 11 acts only on the triaxial pressure probe array through the joint part 4 and preventing the detected data from being less than the actual value.

[0035] In a further embodiment, referring to Figure 11, disclose a specific configuration of a first pressure probe 7. The first pressure probe 7 includes a coaxial outer ring 71 and a pressure sensor 72. A compensation gap 73 is formed between the outer ring 71 and the pressure sensor 72. A support frame 74 is installed in the compensation gap 73. The support frame 74 is in direct contact with the inner wall of the outer ring 71 and the outer wall of the pressure sensor 72. The support frame 74 is an elastic structure and can be deformed under pressure. Cooperating with the compensation gap 73, the pressure sensor 72 can slide in two degrees of freedom within the outer ring 71. With this design, the pressure sensor 72 can detect the force vertically acting on the end face of the pressure sensor 72, while the force parallel to the end face of the pressure sensor 72 will be offset by the same-direction sliding of the pressure sensor 72. At the same time, a sliding bearing 75 is installed at one end of the pressure sensor 72 inside the outer ring 71, which can perform self-adaptive horizontal sliding with small frictional resistance. The second pressure probe 8 and the third pressure probe 9 have the same structure as the first pressure probe 7 except for the installation positions. That is, the first pressure probe 7 only detects the driving force in the horizontal direction and perpendicular to the axis of the tool bar 11, and the driving forces in the other two directions will be offset by driving the first pressure probe 7 to slide; the second pressure probe 8 only detects the driving force in the same direction as the axis of the tool bar 11, and the driving forces in the other two directions will be offset by driving the second pressure probe 8 to slide; the third pressure probe 9 only detects the driving force in the vertical direction and perpendicular to the axis of the tool bar 11, and the driving forces in the other two directions will be offset by driving the third pressure probe 9 to slide, preventing the driving forces with multiple degrees of freedom of the tool bar 11 from all acting on the same fixed pressure sensor 72 to generate a resultant force and avoiding the insufficient detection accuracy caused by the interference of driving forces at multiple angles.

[0036] Through the above technical solution, the pressure sensor 72 can detect the force vertically acting on the end face of the pressure sensor 72, while the force parallel to the end face of the pressure sensor 72 will be offset by the sliding of the pressure sensor 72, ensuring the installation stability during long-term detection and reducing the influence of multi-degree-of-freedom movement on the detection accuracy through self-adaptive horizontal sliding.

[0037] The working principle of this embodiment is as follows: Clamp the ultrasonic knife 1 horizontally and centrally on the clamping bracket 2. By adjusting the position of the overhead part 5 relative to the screw 61 above the end bracket 6, make the overhead part 5 at the same height as the tool bar 11 of the ultrasonic knife 1, and complete the coaxial arrangement of the three-axis pressure probe array (the first pressure probe 7, the second pressure probe 8, and the third pressure probe 9) relative to the tool bar 11; Move the first clamp 42 and the second clamp 43 of the joint part 4 closer to each other and use the clamp 44 to hold them tightly, and clamp them at the end of the tool bar 11 of the ultrasonic knife 1. Then, insert the insertion rod 45 into the blade groove 12 opened on the tool bar 11 through the insertion hole 49 formed by the first clamp 42 and the second clamp 43, so that the joint part 4 can move with multiple degrees of freedom of the tool bar 11 without relative displacement; At this time, the three-axis pressure probe array is located in the accommodating space 48 formed by the clamp 1 42 and the clamp 2 43. The accommodating space 48 opens toward the overhead portion 5 and has a flat end face and inner wall. The pressure probe 1 7 directly contacts the vertical side wall of the accommodating space 48 parallel to the axis of the tool rod 11, the pressure probe 2 8 directly contacts the vertical side wall of the accommodating space 48 perpendicular to the axis of the tool rod 11, and the pressure probe 3 9 directly contacts the horizontal side wall of the accommodating space 48 parallel to the axis of the tool rod 11. When the joint 4 moves with the tool rod 11 at multiple angles, the driving force in the three-axis directions can be collected respectively through the three-axis pressure probe array, and the driving force detection is more comprehensive and in line with reality. After the driving force test is completed, the ultrasonic scalpel 1 does not stop working, but directly uses the steel rope 47 to pull the transmission member 46, so that the insertion rod 45 moves upward and disengages from the knife rod 11, and the clamp 44 swings to loosen the clamp 1 42 and the clamp 2 43, so that the joint 4 is separated from the knife rod 11, simulating the scene of the load (blade or blade fastener) on the knife rod 11 falling off, and testing whether the anti-slip function of the ultrasonic scalpel 1 is normally started (the ultrasonic scalpel head of the Johnson & Johnson ETHICON HAR1120 ultrasonic high-frequency surgical integrated system, the SoniCure® ultrasonic soft tissue cutting and hemostasis device independently developed by Beijing Sino Micro Medical Technology Co., Ltd., and other equipment all have this anti-slip shutdown function). If the ultrasonic scalpel 1 stops working at the moment the joint 4 is detached, it means that the anti-slip function is normal. This setting makes the driving force test equipment more applicable. At the same time, the steel rope 47 can be in a relaxed state during the driving force test of the ultrasonic scalpel 1 to avoid the driving force from being transmitted outward along the taut steel rope 47, thereby ensuring the detection accuracy.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention.

Claims

1. An ultrasonic knife head driving force testing tool, comprising a frame (3), characterized in that: Also includes: A clamping frame (2) fixed to the flat surface of the frame (3), the clamping frame (2) having the ability to open and close horizontally, and the clamping frame (2) is used to horizontally fix and press the ultrasonic knife (1) placed thereon; A test head located at the end of a blade rod (11) of an ultrasonic blade (1), the test head comprising a joint portion (4) and an overhead portion (5), the joint portion (4) being adapted to be opened and closed at the end of the blade rod (11) to form a receiving space (48), the overhead portion (5) being fixed at a coaxial position of the blade rod (11), the overhead portion (5) being fixedly mounted with a three-axis pressure probe array in the receiving space (48), the three-axis pressure probe array being composed of a pressure probe 1 (7), a pressure probe 2 (8) and a pressure probe 3 (9), so as to realize contact monitoring of the joint portion (4) in the vertical, horizontal and depth directions; An end frame (6), wherein the end frame (6) is fixed to the end of the clamping frame (2), and the end frame (6) is connected to the overhead portion (5) through a screw rod (61) and a self-locking nut to achieve vertical position adjustment of the three-axis pressure probe array.

2. The ultrasonic knife head driving force testing tool according to claim 1, characterized in that: The clamping frame (2) comprises a slide rail (23), a fork frame 1 (21) is slidably mounted on the slide rail (23), a fork frame 2 (22) is fixedly mounted at the end of the slide rail (23), and the fork frame 1 (21) can be pushed toward the fork frame 2 (22) by a pushing member (24).

3. The ultrasonic knife head driving force testing tool according to claim 2, characterized in that: The push piece (24) is composed of a crank and a push rod. The middle part of the crank is hinged to the end of the push rod. The distal end of the push rod is hinged to a cylinder. The cylinder is covered with a guide seat and slidably installed on a slide rail (23). The cylinder is detachably connected to a fork frame (21) by bolts. A limit seat (25) is provided below the crank. The limit seat (25) is detachably connected to the crank by a pin rod.

4. The ultrasonic scalpel head driving force testing tool according to claim 1, characterized in that: The joint portion (4) comprises a connecting frame (41), a first clamp (42) and a second clamp (43) being hingedly connected to the connecting frame (41), the ends of the first clamp (42) and the second clamp (43) forming an arc-shaped inner wall adapted to the knife rod (11), and a clamp (44) being mounted on the connecting frame (41), the clamp (44) pressing the first clamp (42) and the second clamp (43) against the end of the knife rod (11) in a vertical position, and the clamp (44) being able to swing ninety degrees to realize the release of the first clamp (42) and the second clamp (43).

5. The ultrasonic scalpel head driving force testing tool according to claim 4, characterized in that: The connecting frame (41) is provided with an insertion rod (45) at the position of the through hole of the blade slot (12) of the blade rod (11); the first clamp (42) and the second clamp (43) form a semicircular groove at the position of the through hole of the blade slot (12); the two semicircular grooves are combined to form a perfect circular insertion hole (49); the insertion rod (45) can be vertically displaced to pass through the insertion hole (49) and be inserted into the through hole of the blade slot (12).

6. The ultrasonic scalpel head driving force testing tool according to claim 5, characterized in that: The joint portion (4) further comprises a transmission member (46), the transmission member (46) having a longitudinal sliding frame (461), a rocker arm (462) slidably mounted on the longitudinal sliding frame (461) at a transverse opening (466) and rotatably connected to the connecting frame (41), a top end of the insertion rod (45) being fixed to a bottom end of the longitudinal sliding frame (461), a connecting shaft (441) being coaxially arranged between the first clamp (42) and the second clamp (43), a steel rope (47) being coiled around the middle of the connecting shaft (441), a middle shaft (463) being rotatably mounted near the connecting shaft (441), a bushing (468) being sleeved on the middle of the middle shaft (463) on the outside of the steel rope (47).

7. The ultrasonic scalpel head driving force testing tool according to claim 6, characterized in that: A roller (467) is installed at one end of the longitudinal sliding frame (461), and the roller (467) corresponds to the longitudinal opening (411) of the connecting frame (41). A central axis (463) is provided at the lower middle portion of the longitudinal sliding frame (461), and a stabilizing rod (465) is rotatably installed at the end of the central axis (463). One end of the stabilizing rod (465) away from the central axis (463) is hinged to the connecting frame (41).

8. The ultrasonic scalpel head driving force testing tool according to claim 6, characterized in that: A through-tube cooperating with the steel rope (47) is installed at the top of the connecting frame (41); an attraction block (472) is installed at one end of the steel rope (47); a sleeve (471) is sleeved outside the attraction block (472); an electromagnet (473) is installed at the other end of the sleeve (471); a top plate (62) is fixed outside the sleeve (471); and the top plate (62) is detachably installed on the top of the screw rod (61) through a screw cap (63).

9. The ultrasonic scalpel head driving force testing tool according to claim 4, characterized in that: The overhead part (5) is provided with a vertical smooth hole to fit the screw rod (61). The mounting platform (51) at one end of the overhead part (5) located in the accommodating space (48) is fixed with four pressure probes 1 (7), one pressure probe 2 (8) and two pressure probes 3 (9). The connecting frame (41) is sleeved on the outside of the overhead part (5) to form an annular gap (52).

10. The ultrasonic scalpel head driving force testing tool according to claim 1, characterized in that: The pressure probe 1 (7) comprises an outer ring (71) and a pressure sensor (72) which are coaxially arranged. A compensation gap (73) is provided between the outer ring (71) and the pressure sensor (72). A support frame (74) is installed in the compensation gap (73) to directly contact the inner wall of the outer ring (71) and the outer wall of the pressure sensor (72). A sliding bearing (75) is installed at the end of the pressure sensor (72). The structures of the pressure probe 2 (8) and the pressure probe 3 (9) are the same as those of the pressure probe 1 (7), except for the installation positions.

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