Corrosion-resistant surgical instrument

Abstract

The utility model relates to the technical field of surgical instruments, in particular to a corrosion-resistant surgical instrument. According to the technical scheme, the corrosion-resistant surgical instrument comprises a sheath, a knife handle, a blade and an installation groove, a first reed is arranged in the sheath, second reeds are arranged on the two sides of the knife handle, the knife handle is installed in the sheath in a limited mode through cooperation of the second reeds and the first reed, the installation groove is formed in the knife handle, and the blade is arranged in the installation groove. A fixing buckle is arranged in the installation groove, and a blade is installed in the installation groove of the knife handle in a limited mode through the fixing buckle. The utility model provides a safer, more convenient and more reliable operation tool for medical personnel, and is beneficial to improving the success rate of an operation and the treatment effect of a patient.

Description

Technical Field

[0001] The utility model relates to the technical field of surgical instruments, in particular to a corrosion-resistant surgical instrument. Background Art

[0002] Surgical instruments are tools and equipment used in medical operations, including various knives, pliers, needles and threads, syringes, aspirators, electric instruments, etc. The types and uses of these instruments vary. Depending on the type and needs of the operation, the doctor will choose the appropriate instrument to operate. For example, scalpels are used to cut tissues, suture needles and threads are used to suture wounds, aspirators are used to remove blood and other fluids, and electric instruments can be used to assist in surgery, such as electric knives for hemostasis or cutting tissues. These instruments play a vital role in surgery to ensure the smooth progress of the operation and the safety of the patient. At present, surgical instruments are mostly made of 2Cr13 or 3Cr13 materials. Titanium nitride coatings are prepared on the surface of such materials. After high-temperature sterilization, rust and coating shedding occur, which poses a fatal risk to the recovery of patients' wounds. Utility Model Content

[0003] The utility model provides a corrosion-resistant surgical instrument, which solves the above-mentioned technical problems.

[0004] The utility model solves the above-mentioned technical problems as follows:

[0005] A corrosion-resistant surgical instrument comprises a sheath, a handle, a blade and a mounting groove, wherein a first spring is arranged inside the sheath, and second springs are arranged on both sides of the handle, and the handle is installed in the sheath by the second spring cooperating with the first spring to limit the position, and the handle is provided with a mounting groove, and a fixing buckle is provided in the mounting groove, and a blade is installed in the mounting groove of the handle by limiting the position of the fixing buckle.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the base layer of the tool handle and the blade is prepared by magnetron sputtering, the transition layer is prepared by magnetron sputtering and cathode arc technology, and the functional layer is prepared by cathode arc technology.

[0008] The beneficial effects of adopting the above further scheme are:

[0009] Material uniformity and density: Magnetron sputtering technology can form a uniform and dense film layer on the surface of the base material, which ensures the quality and uniformity of the surface of the handle and blade. This uniformity and density help improve corrosion resistance and mechanical properties, thereby extending the service life of the instrument.

[0010] Good adhesion: The film layer prepared by magnetron sputtering technology has good adhesion and can be firmly attached to the base material without peeling or falling off. This excellent adhesion ensures the stability of the transition layer and the functional layer, making the handle and blade less susceptible to damage or peeling during use.

[0011] Precise film control: Magnetron sputtering technology can achieve precise control of film composition and thickness, which enables the prepared transition layer and functional layer to have precise chemical composition and thickness, thereby ensuring the performance and functional stability of the device surface.

[0012] Process stability: Magnetron sputtering and cathode arc technology are both mature and stable surface treatment technologies, with the characteristics of high efficiency and reliability. This process stability ensures the consistency and repeatability of the preparation process, so that the produced devices have stable quality and performance.

[0013] Multifunctionality: The transition layer and functional layer prepared by magnetron sputtering and cathode arc technology can be adjusted according to specific needs, so that the device has different functional properties, such as antibacterial, anti-friction, biocompatibility, etc., thereby improving the comprehensive performance and scope of application of the device.

[0014] Furthermore, the bottom layer material of the handle and the blade is chromium, and the thickness is 3-5 μm.

[0015] The beneficial effects of adopting the above further scheme are:

[0016] Excellent corrosion resistance: Chromium is a metal material with good corrosion resistance, which has high stability in most corrosive media. Therefore, using chromium as the base material of the handle and blade can effectively improve the corrosion resistance of the instrument and extend its service life.

[0017] Hardness and wear resistance: Chromium has high hardness and wear resistance, and can effectively resist friction and wear. Therefore, as the base material of the handle and blade, chromium can provide good wear resistance and maintain the sharpness and functionality of the instrument.

[0018] Surface smoothness: Chrome materials have high surface smoothness and flatness, which helps to reduce friction resistance, improve the operability and feel of the instrument, and make surgical operations smoother and more precise.

[0019] Biocompatibility: Chromium is a commonly used biomedical material with good biocompatibility and is not prone to allergic or rejection reactions. Therefore, as the base material of the handle and blade, chromium can ensure good compatibility between the instrument and human tissue, reducing the risk of postoperative complications.

[0020] Simple preparation process: Chromium materials are easy to process and prepare. The chromium base layer prepared in the form of a thin film or coating can be prepared using a variety of process methods, such as magnetron sputtering, electroplating, etc. The preparation process is relatively simple, the cost is low, and the production efficiency is high.

[0021] Furthermore, the thickness of the transition layer between the handle and the blade is 1-2 μm.

[0022] The beneficial effects of adopting the above further scheme are:

[0023] Improve adhesion: The presence of the transition layer can enhance the adhesion between the bottom layer and the functional layer. The appropriate thickness of the transition layer can ensure that there is enough bonding area and contact surface between the bottom layer and the functional layer, thereby improving the adhesion and stability of the coating and reducing the possibility of peeling or falling off of the coating.

[0024] Reduce stress concentration: The presence of the transition layer can reduce the stress concentration between the bottom layer and the functional layer. The gradual transition of the material properties and structure through the transition layer can effectively alleviate the stress difference between the bottom layer and the functional layer, reducing the risk of cracks or peeling during use of the coating.

[0025] Improve corrosion resistance: The addition of a transition layer can further enhance the corrosion resistance of the handle and blade. The transition layer is usually made of a material similar or compatible with the functional layer and has certain corrosion resistance. Therefore, forming a transition layer between the bottom layer and the functional layer can further improve the corrosion resistance of the overall coating.

[0026] Precise control of coating properties: By precisely controlling the thickness of the transition layer, the properties of the coating can be adjusted. The appropriate thickness of the transition layer can balance the hardness, wear resistance, corrosion resistance and other properties of the coating, making the coating more suitable for specific use environments and application requirements.

[0027] Optimize the preparation process: The addition of the transition layer can optimize the preparation process of the coating. The presence of the transition layer can improve the interface quality between the bottom layer and the functional layer, making the preparation process of the coating more stable and controllable, and improving the production efficiency and quality of the coating.

[0028] Furthermore, the functional layer thickness of the handle and the blade is 2-3 μm.

[0029] The beneficial effects of adopting the above further scheme are:

[0030] Provide more functions: The existence of the functional layer gives the handle and blade additional functional characteristics. The functional layer can be designed as needed, such as antibacterial, anti-oxidation, anti-friction and other functions, providing more options and possibilities for the use of surgical instruments.

[0031] Enhanced wear resistance: The functional layer usually has higher hardness and wear resistance, which can effectively improve the wear resistance of the handle and blade. During surgical operations, the blade often needs to withstand friction and wear. The presence of the functional layer can extend the service life of the blade and reduce the number of frequent blade replacements.

[0032] Improve corrosion resistance: The functional layer can further enhance the corrosion resistance of the handle and blade. The functional layer usually has good chemical stability and corrosion resistance, which can prevent the handle and blade from being corroded by acid and alkali solutions, biological fluids and other corrosive media, and keep the surface of the instrument clean and smooth.

[0033] Improved feel and operability: The presence of the functional layer can improve the surface texture of the handle and blade, making them smoother and flatter, and improve the feel and operability. During surgery, surgeons need to operate the instruments precisely, and good feel and operability can improve the accuracy and efficiency of the operation.

[0034] Improved aesthetics: The functional layer can add a layer of coating to the handle and blade to make it more beautiful. By selecting different functional layer materials and coating processes, various colors and patterns can be coated, which improves the aesthetic effect and quality of the instrument.

[0035] Furthermore, a sliding groove is provided on the sheath, and a sliding block is provided on the knife handle, and the sliding distance of the knife handle is limited by the sliding groove and the sliding block.

[0036] The beneficial effects of adopting the above further scheme are:

[0037] Precise control of operating distance: The design of the slide and slider can effectively limit the sliding distance of the handle, allowing the surgeon to accurately control the operating range and amplitude of the instrument. This precise control can ensure that the surgical operation is more accurate and safe, reducing operational errors and risks.

[0038] Stability and reliability: The limiting effect of the chute and slider can increase the stability and reliability of the knife handle in the sheath. During the operation, the stability of the knife handle is crucial to the success of the operation. The design of the chute and slider can reduce the shaking and instability of the knife handle and improve the success rate of the operation.

[0039] Reduced operating difficulty: The design of the slide and slider makes the operation of the knife handle smoother and easier. The doctor can easily move the slider to adjust the position of the knife handle for fast and accurate operation. This design reduces the difficulty and technical requirements of surgical operation and improves the doctor's operating efficiency.

[0040] Avoid excessive sliding: The limiting effect of the slide and slider can prevent the handle from sliding excessively in the sheath, thereby reducing the wear and damage of the instrument. Excessive sliding may cause friction and wear between instrument parts, affecting the service life and performance of the instrument, and the restriction of the slide and slider can effectively reduce the occurrence of this situation.

[0041] Enhance the stability of the instrument: The design of the chute and slider can enhance the overall stability of the instrument. During surgical operations, the stability of the instrument is crucial to the smooth progress of the operation. Through the restrictions of the chute and slider, the stability of the instrument can be maintained, unnecessary movement and shaking during the operation can be reduced, and the accuracy and success rate of the operation can be improved.

[0042] Furthermore, the sliding distance of the handle in the sheath is adapted to the length of the blade.

[0043] The beneficial effects of adopting the above further scheme are:

[0044] Ensure full use of the blade: The sliding distance of the handle in the sheath is adapted to the length of the blade, which can ensure that the blade is fully extended out of the sheath and in the use position. This can maximize the effective length of the blade, ensure that the blade can be fully utilized during the surgical operation, and improve surgical efficiency.

[0045] Reduced operational risks: The sliding distance is adapted to the blade length, which can reduce unnecessary blade exposure or overexposure. This helps reduce the risk of accidental injury or misoperation during surgery, and ensures the safety and success rate of surgery.

[0046] Improved operation accuracy: The sliding distance of the handle in the sheath is adapted to the length of the blade, which can make the position of the blade stable and accurate. This helps the doctor to more accurately control the position and depth of the blade, making the operation more precise and reducing the risk of damaging surrounding tissues.

[0047] Extended blade life: The handle sliding distance is adapted to the blade length, which can reduce the time the blade is exposed to the outside when not in use. This helps to reduce the blade's contact with the environment and wear, extend the blade's life, and reduce the frequency and cost of blade replacement.

[0048] Simplify the operation process: The adaptive sliding distance can simplify the surgical operation process and reduce the doctor's adjustment and control of the handle position. The doctor does not need to pay too much attention to the relationship between the handle position and the blade, and can focus more on the surgical operation itself, improving the efficiency and smoothness of the operation.

[0049] Furthermore, the first spring leaf and the second spring leaf are symmetrically distributed on both sides of the sheath and the handle respectively.

[0050] The beneficial effects of adopting the above further scheme are:

[0051] Enhanced stability: The first and second springs are symmetrically distributed on both sides of the sheath and the handle, which can enhance the overall stability of the instrument. This symmetrical distribution design makes the connection between the handle and the sheath more secure, reduces the instability caused by the shaking of the instrument during the operation, and improves the success rate of the operation.

[0052] Uniform force: The symmetrical distribution design can make the force on the first and second reeds more evenly distributed. When the handle is connected to the sheath, the reeds on both sides can evenly withstand pressure and vibration, avoiding breakage or loosening caused by excessive force on one side, ensuring the stability and reliability of the instrument.

[0053] Operational balance: The symmetrical distribution design helps maintain the operational balance of the instrument. When the doctor operates the instrument, he can feel the balanced force between the handle and the sheath, making the operation smoother and more comfortable, and reducing hand fatigue and discomfort caused by unbalanced operation.

[0054] Easy to install and remove: The symmetrical distribution design of the first and second reeds makes the installation and removal of the instrument more convenient. When assembling the instrument, the symmetrical layout can ensure that the reeds are smoothly matched with the corresponding connection points, reducing the difficulties and mistakes in the assembly process.

[0055] Improve the durability of the instrument: The symmetrical distribution design helps reduce wear and damage caused by unilateral force. The first and second reeds bear the pressure evenly, which prolongs the service life of the instrument, reduces the frequency of maintenance and replacement, and reduces the cost of use.

[0056] Furthermore, the sheath is composed of two shells, and the two shells are connected by a snap-fit ​​limiter.

[0057] The beneficial effects of adopting the above further scheme are:

[0058] Stronger structural stability: The design of two shells makes the structure of the sheath more stable. The two shells cooperate with each other to form a stronger shell structure, which can effectively resist external impact and pressure, and improve the durability and safety of the device.

[0059] Easy assembly and disassembly: The design of the snap-on limit connection makes the assembly and disassembly of the sheath easier and faster. Medical staff can easily connect or separate the two shells without using additional tools, saving operation time and labor costs and improving use efficiency.

[0060] Reduced maintenance costs: Since the sheath adopts a simple buckle limit connection design, it is easier to maintain and replace the sheath. Hospitals or clinics can replace and maintain the sheath more quickly, reducing the repair cost and downtime caused by equipment damage, and reducing the cost of use.

[0061] Reduced impurities inside the device: The two shells are connected by snap-fit ​​limiters to form a sealed sheath structure, which can effectively prevent external impurities from entering the device. This helps to keep the inside of the device clean and hygienic, reduces the risk of infection and cross infection, and ensures the safety of patients.

[0062] Improved the appearance of the device: The design of the two shells connected by the buckle limit makes the appearance of the device more neat and beautiful. No additional screws or fixings are required at the connection, making the surface of the device smoother and improving the overall texture and quality impression of the device.

[0063] The beneficial effects of the utility model are:

[0064] Corrosion resistance: The base layer, transition layer and functional layer prepared by magnetron sputtering provide excellent corrosion resistance for the handle and blade. The chromium material as the base layer has good corrosion resistance and can prevent oxidation and rust. At the same time, the design of the transition layer and functional layer further enhances the corrosion resistance, ensuring that the instrument will not be damaged when in contact with biological fluids or chemicals.

[0065] Reasonable structure: The instrument uses multiple components such as a sheath, a handle, and a blade, which are connected by snap-on limiters. This structural design makes the assembly and disassembly process easier, allowing medical staff to prepare and clean the instrument more quickly, thereby improving surgical efficiency.

[0066] Safe and reliable: The design of the first and second springs allows the handle to be firmly fixed in the sheath, preventing accidental injuries caused by loosening or movement of the instrument during surgery. This limited installation design ensures the stability of the blade, allowing doctors to focus more on the surgical operation without worrying about the safety of the instrument.

[0067] Convenient operation: There is a slide groove on the sheath and a slider on the handle. Through this design, the doctor can control the moving distance of the instrument more flexibly, making the operation more precise. This design can also reduce unnecessary vibration and shaking during the operation, and improve the success rate of the operation.

[0068] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the utility model with the accompanying drawings. The specific implementation method of the utility model is given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0070] In the attached picture:

[0071] Figure 1 This is a schematic diagram of the storage-shaped top view of the utility model;

[0072] Figure 2 It is a schematic diagram of the axial side appearance of the storage shape of the utility model;

[0073] Figure 3 This is a schematic diagram of the utility model in a stretched-out top view;

[0074] Figure 4 This is a schematic diagram of the axial side appearance of the utility model in an extended state;

[0075] Figure 5 This is a schematic diagram of the axial side cross-sectional structure of the utility model;

[0076] Figure 6 It is a schematic diagram of the reverse axial side cross-sectional structure of the utility model.

[0077] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0078] 1. Sheath; 2. Slide groove; 3. Slider; 4. Handle; 5. Blade; 6. First reed; 7. Second reed; 8. Fixing buckle; 9. Mounting groove. DETAILED DESCRIPTION

[0079] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0080] See also Figures 1 to 6 As shown, the embodiments provided by the utility model:

[0081] Embodiment 1

[0082] A corrosion-resistant surgical instrument comprises a sheath 1, a knife handle 4, a blade 5 and a mounting groove 9. A first spring 6 is arranged inside the sheath 1. The sheath 1 is composed of two shells, and the two shells are connected by a buckle limiter. The design of the two shells makes the structure of the sheath 1 more stable. The two shells cooperate with each other to form a more solid shell structure, which can effectively resist external impact and pressure, and improve the durability and safety of the instrument. The design of the buckle limiter connection makes the assembly and disassembly of the sheath 1 simpler and faster. Medical staff can easily connect or separate the two shells without using additional tools, saving operation time and labor costs, and improving the use efficiency. Since the sheath 1 adopts a simple buckle limiter connection design, it becomes easier to maintain and replace the sheath 1. Hospitals or clinics can replace and maintain the sheath 1 more quickly, reducing the maintenance cost and downtime caused by damage to the instrument, and reducing the use cost. The two shells are connected by the buckle limiter to form a sealed sheath 1 structure, which can effectively prevent external impurities from entering the inside of the instrument. This helps to keep the inside of the device clean and hygienic, reduces the risk of infection and cross infection, and ensures the safety of the patient. The design of the two shells connected by the buckle limit makes the appearance of the device more neat and beautiful. No additional screws or fixings are required at the connection, making the surface of the device smoother, improving the overall texture and quality impression of the device. The handle 4 and the blade 5 are prepared by magnetron sputtering. The bottom layer is prepared by magnetron sputtering and cathode arc technology. The functional layer is prepared by cathode arc technology, so as to prevent rust and coating shedding. The magnetron sputtering technology can form a uniform and dense film layer on the surface of the base material, which ensures the quality and uniformity of the surface of the handle 4 and the blade 5. This uniformity and density help to improve corrosion resistance and mechanical properties, thereby extending the service life of the device. The film layer prepared by magnetron sputtering technology has good adhesion, can be firmly attached to the base material, and is not easy to peel off or fall off. This excellent adhesion ensures the stability of the transition layer and the functional layer, so that the handle 4 and the blade 5 are not easily damaged or peeled off during use. Magnetron sputtering technology can achieve precise control of film composition and thickness, which makes the prepared transition layer and functional layer have precise chemical composition and thickness, thus ensuring the stability of the performance and function of the device surface. Magnetron sputtering and cathode arc technology are both mature and stable surface treatment technologies with the characteristics of high efficiency and reliability. This process stability ensures the consistency and repeatability of the preparation process, so that the produced devices have stable quality and performance.The transition layer and functional layer prepared by magnetron sputtering and cathode arc technology can be regulated according to specific needs, so that the instrument has different functional characteristics, such as antibacterial, anti-friction, biocompatibility, etc., thereby improving the comprehensive performance and application range of the instrument. The bottom material of the handle 4 and the blade 5 is chromium, and the thickness is 3-5μm. Chromium is a metal material with good corrosion resistance, which has high stability in most corrosive media. Therefore, using chromium as the bottom material of the handle 4 and the blade 5 can effectively improve the corrosion resistance of the instrument and extend its service life. Chromium has high hardness and wear resistance and can effectively resist friction and wear. Therefore, as the bottom material of the handle 4 and the blade 5, chromium can provide good wear resistance and maintain the sharpness and functionality of the instrument. Chromium material has high surface smoothness and flatness, which helps to reduce friction resistance, improve the operability and feel of the instrument, and make the surgical operation smoother and more precise. Chromium is a commonly used biomedical material with good biocompatibility and is not easy to cause allergic or rejection reactions. Therefore, as the bottom material of the handle 4 and the blade 5, chromium can ensure good compatibility between the instrument and human tissue and reduce the risk of postoperative complications. Chromium materials are easy to process and prepare. The chromium bottom layer prepared in the form of a thin film or coating can be prepared by a variety of process methods, such as magnetron sputtering, electroplating, etc. The preparation process is relatively simple, the cost is low, and the production efficiency is high. The thickness of the transition layer of the handle 4 and the blade 5 is 1-2μm, and the transition layer material is chromium nitride. The presence of the transition layer can enhance the adhesion between the bottom layer and the functional layer. The appropriate thickness of the transition layer can ensure that there is sufficient bonding area and contact surface between the bottom layer and the functional layer, thereby improving the adhesion and stability of the coating and reducing the possibility of peeling or shedding of the coating. The presence of the transition layer can reduce the stress concentration between the bottom layer and the functional layer. The properties and structure of the material gradually transitioned by the transition layer can effectively alleviate the stress difference between the bottom layer and the functional layer, reducing the risk of cracks or peeling of the coating during use. The addition of the transition layer can further enhance the corrosion resistance of the handle 4 and the blade 5. The transition layer is usually made of a material similar to or compatible with the functional layer and has certain corrosion resistance. Therefore, forming a transition layer between the bottom layer and the functional layer can further improve the corrosion resistance of the overall coating. The performance of the coating can be adjusted by precisely controlling the thickness of the transition layer. The appropriate thickness of the transition layer can balance the hardness, wear resistance, corrosion resistance and other properties of the coating, making the coating more suitable for specific use environments and application requirements. The addition of a transition layer can optimize the preparation process of the coating. The presence of the transition layer can improve the interface quality between the bottom layer and the functional layer, making the coating preparation process more stable and controllable, and improving the production efficiency and quality of the coating. The thickness of the functional layer of the handle 4 and the blade 5 is 2-3μm, and the material of the functional layer is TiN or DLC. The presence of the functional layer gives the handle 4 and the blade 5 additional functional characteristics.The functional layer can be designed as needed, such as antibacterial, anti-oxidation, anti-friction and other functions, providing more options and possibilities for the use of surgical instruments. The functional layer usually has high hardness and wear resistance, which can effectively improve the wear resistance of the handle 4 and the blade 5. During surgical operations, the blade 5 often needs to withstand friction and wear. The presence of the functional layer can extend the service life of the blade 5 and reduce the number of frequent replacements of the blade 5. The functional layer can further enhance the corrosion resistance of the handle 4 and the blade 5. The functional layer usually has good chemical stability and corrosion resistance, which can prevent the handle 4 and the blade 5 from being corroded by corrosive media such as acid and alkali solutions and biological fluids, and keep the surface of the instrument clean and smooth. The presence of the functional layer can improve the surface texture of the handle 4 and the blade 5, making it smoother and flatter, and improving the feel and operability. During surgical operations, surgeons need to operate the instruments accurately, and good feel and operability can improve the accuracy and efficiency of the operation. The functional layer can add a layer of appearance coating to the handle 4 and the blade 5 to make their appearance more beautiful. By selecting different functional layer materials and coating processes, various colors and patterns of coating can be achieved, which improves the aesthetic effect and quality of the instrument. The handle 4 is provided with a second reed 7 on both sides. The handle 4 is installed in the sheath 1 through the second reed 7 and the first reed 6. The first reed 6 and the second reed 7 are symmetrically distributed on both sides of the sheath 1 and the handle 4, respectively. The first reed 6 and the second reed 7 are symmetrically distributed on both sides of the sheath 1 and the handle 4, which can enhance the overall stability of the instrument. This symmetrical distribution design makes the connection between the handle 4 and the sheath 1 more secure, reduces the unstable factors caused by the shaking of the instrument during the surgical operation, and improves the success rate of the operation. The symmetrical distribution design can make the force on the first reed 6 and the second reed 7 more evenly distributed. When the handle 4 is connected to the sheath 1, the reeds on both sides can evenly withstand pressure and vibration, avoiding breakage or loosening caused by excessive force on one side, and ensuring the stability and reliability of the instrument. The symmetrical distribution design helps to maintain the operational balance of the instrument. When operating the instrument, the doctor can feel the balanced force between the handle 4 and the sheath 1, making the operation smoother and more comfortable, reducing hand fatigue and discomfort caused by unbalanced operation. The symmetrical distribution design of the first reed 6 and the second reed 7 makes the installation and disassembly of the instrument more convenient. When assembling the instrument, the symmetrical layout can ensure that the reeds are smoothly matched with the corresponding connection points, reducing difficulties and mistakes in the assembly process. The symmetrical distribution design helps to reduce wear and damage caused by unilateral force. The first reed 6 and the second reed 7 evenly bear the pressure, which prolongs the service life of the instrument, reduces the frequency of maintenance and replacement, and reduces the cost of use. A slide groove 2 is provided on the sheath 1, and a slider 3 is provided on the handle 4. The handle 4 limits the sliding distance through the slide groove 2 and the slider 3. The design of the slide groove 2 and the slider 3 can effectively limit the sliding distance of the handle 4, so that the surgeon can accurately control the operating range and amplitude of the instrument.This precise control can ensure that the surgical operation is more accurate and safe, and reduce operational errors and risks. The limiting effect of the chute 2 and the slider 3 can increase the stability and reliability of the handle 4 in the sheath 1. During the operation, the stability of the handle 4 is crucial to the success of the surgical operation. The design of the chute 2 and the slider 3 can reduce the shaking and instability of the handle 4, thereby improving the success rate of the operation. The design of the chute 2 and the slider 3 makes the operation of the handle 4 smoother and easier. The doctor can adjust the position of the handle 4 by easily moving the slider 3 to achieve fast and accurate operation. This design reduces the difficulty and technical requirements of the surgical operation and improves the doctor's operating efficiency. The limiting effect of the chute 2 and the slider 3 can prevent the handle 4 from sliding excessively in the sheath 1, thereby reducing the wear and damage of the instrument. Excessive sliding may cause friction and wear between the instrument components, affecting the service life and performance of the instrument, and the restriction of the chute 2 and the slider 3 can effectively reduce the occurrence of this situation. The design of the chute 2 and the slider 3 can enhance the overall stability of the instrument. In the operation, the stability of the instrument is crucial for the smooth progress of the operation. The restrictions of the slide groove 2 and the slider 3 can maintain the stability of the instrument, reduce unnecessary movement and shaking during the operation, and improve the accuracy and success rate of the operation. The handle 4 is provided with a mounting groove 9, and a fixing buckle 8 is provided in the mounting groove 9 of the handle 4. The blade 5 is limited and installed in the mounting groove 9 of the handle 4 through the fixing buckle 8. The sliding distance of the handle 4 in the sheath 1 is adapted to the length of the blade 5. When the blade 5 is not needed, the blade 5 is stored through the sheath 1. When the blade 5 is needed, the blade 5 is pushed out for use. The sliding distance of the handle 4 in the sheath 1 is adapted to the length of the blade 5, which can ensure that the blade 5 is fully extended from the sheath 1 and is in the use position. In this way, the effective length of the blade 5 can be maximized, ensuring that the blade 5 can be fully utilized in the operation, and improving the efficiency of the operation. The sliding distance is adapted to the length of the blade 5, which can reduce the unnecessary exposure or overexposure of the blade 5. This helps to reduce the risk of accidental injury or misoperation during the operation and ensure the safety and success rate of the operation. The sliding distance of the handle 4 in the sheath 1 is adapted to the length of the blade 5, so that the position of the blade 5 can be stable and precise. This helps the doctor to control the position and depth of the blade 5 more accurately, making the surgical operation more precise and reducing the risk of damaging surrounding tissues. The sliding distance of the handle 4 is adapted to the length of the blade 5, which can reduce the time that the blade 5 is exposed to the outside when not in use. This helps to reduce the contact and wear of the blade 5 with the environment, extend the service life of the blade 5, and reduce the frequency and cost of replacing the blade 5. The adapted sliding distance can simplify the surgical operation process and reduce the doctor's adjustment and control of the position of the handle 4. The doctor does not need to pay too much attention to the relationship between the position of the handle 4 and the blade 5, and can focus more on the surgical operation itself, improving the efficiency and smoothness of the operation.

[0083] A corrosion-resistant surgical instrument according to Example 1 is used:

[0084] Corrosion resistance: The base layer, transition layer and functional layer prepared by magnetron sputtering provide excellent corrosion resistance for the handle 4 and the blade 5. The chromium material as the base layer has good corrosion resistance and can prevent oxidation and rust. At the same time, the design of the transition layer and the functional layer further enhances the corrosion resistance, ensuring that the instrument will not be damaged when it comes into contact with biological fluids or chemicals.

[0085] Reasonable structure: The instrument adopts multiple components such as sheath 1, handle 4, blade 5, etc., and is connected by snap-fit ​​limiter. This structural design makes the assembly and disassembly process easier, and medical staff can prepare and clean the instrument more quickly, thereby improving the efficiency of the operation.

[0086] Safe and reliable: The design of the first spring 6 and the second spring 7 enables the handle 4 to be firmly fixed in the sheath 1, preventing accidental injuries caused by loosening or movement of the instrument during surgery. This limited installation design ensures the stability of the blade 5, allowing the doctor to focus more on the surgical operation without worrying about the safety of the instrument.

[0087] Convenient operation: The sheath 1 is provided with a slide groove 2, and the handle 4 is provided with a slider 3. Through this design, the doctor can more flexibly control the moving distance of the instrument, making the operation more accurate. This design can also reduce unnecessary vibration and shaking during the operation, and improve the success rate of the operation.

[0088] The above description is only a preferred embodiment of the utility model and does not impose any form of limitation on the utility model. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A corrosion-resistant surgical instrument, characterized in that: The knife comprises a sheath (1), a knife handle (4), a blade (5) and a mounting groove (9); a first spring leaf (6) is arranged inside the sheath (1); second spring leaves (7) are arranged on both sides of the knife handle (4); the knife handle (4) is mounted in the sheath (1) in a limited manner by the second spring leaf (7) cooperating with the first spring leaf (6); a mounting groove (9) is provided on the knife handle (4); a fixing buckle (8) is arranged in the mounting groove (9); and a blade (5) is mounted in the mounting groove (9) of the knife handle (4) in a limited manner by the fixing buckle (8).

2. A corrosion-resistant surgical instrument according to claim 1, characterized in that: The handle (4) and the blade (5) are prepared by magnetron sputtering for the bottom layer, by magnetron sputtering and cathode arc technology for the transition layer, and by cathode arc technology for the functional layer.

3. A corrosion-resistant surgical instrument according to claim 2, characterized in that: The bottom layer material of the handle (4) and the blade (5) is chromium, and the thickness is 3-5 μm.

4. A corrosion-resistant surgical instrument according to claim 2, characterized in that: The thickness of the transition layer between the handle (4) and the blade (5) is 1-2 μm.

5. A corrosion-resistant surgical instrument according to claim 3, characterized in that: The functional layer thickness of the handle (4) and the blade (5) is 2-3 μm.

6. The corrosion-resistant surgical instrument according to claim 1, characterized in that: The sheath (1) is provided with a slide groove (2), the knife handle (4) is provided with a slide block (3), and the sliding distance of the knife handle (4) is limited by the slide groove (2) and the slide block (3).

7. The corrosion-resistant surgical instrument according to claim 1, characterized in that: The sliding distance of the knife handle (4) in the sheath (1) is adapted to the length of the blade (5).

8. The corrosion-resistant surgical instrument according to claim 1, characterized in that: The first spring leaf (6) and the second spring leaf (7) are symmetrically distributed on both sides of the sheath (1) and the knife handle (4).

9. The corrosion-resistant surgical instrument according to claim 1, characterized in that: The protective sleeve (1) is composed of two outer shells, and the two outer shells are connected by means of a snap-fit ​​limiter.

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