Surgical instrument

Abstract

The present application provides a surgical instrument and belongs to the technical field of medical devices. The surgical instrument comprises a knife bar, a sleeve assembly, a first connecting assembly, a second connecting assembly, and a handle assembly. The knife bar is provided with a first end and a second end which are arranged along a first direction. The sleeve assembly is provided with a cavity body extending along the first direction. The sleeve assembly is arranged on the knife bar in a sleeving manner, and the first end extends out of the cavity body. One end of the first connecting assembly is connected to the end of the sleeve assembly proximal to the second end. One end of the second connecting assembly is detachably connected to the other end of the first connecting assembly, and the second connecting assembly is connected to the second end of the knife bar. The handle assembly is connected to the other end of the second connecting assembly. By means of disassembling the sleeve assembly and the knife bar, the knife bar can be cleaned. The cleaned knife bar can be reused without discarding it, thereby reducing resource waste.

Description

surgical instruments

[0001] Cross-references

[0002] This application refers to Chinese Patent Application No. 202420645939.2, filed on March 29, 2024, entitled “Surgical Instrument,” which is incorporated herein by reference in its entirety. Technical Field

[0003] The present application relates to the technical field of medical instruments, and in particular to a surgical instrument. Background Art

[0004] Surgical instruments are widely used in surgical procedures. In related technologies, surgical instruments consist of a scissor shaft, a cannula, and a handle. The cannula and scissor shaft are connected to the handle, and the cannula is mounted on the scissor shaft. The scissor shaft and cannula work together to perform the surgery. During surgery, dirt can enter the space between the scissor shaft and the cannula, which is narrow and difficult to clean.

[0005] In related technologies, surgical instruments are discarded after the operation is completed, resulting in a waste of resources. Summary of the Invention

[0006] The present application aims to solve at least one of the technical problems in the background art. To this end, one purpose of the present application is to provide a surgical instrument to reduce resource waste.

[0007] An embodiment of the first aspect of the present application provides a surgical instrument, which includes: a knife rod having a first end and a second end arranged along a first direction; a sleeve assembly having a cavity extending along the first direction, the sleeve assembly being sleeved on the knife rod, and the first end extending out of the cavity; a first connecting assembly, one end of the first connecting assembly being connected to an end of the sleeve assembly close to the second end; a second connecting assembly, one end of the second connecting assembly being detachably connected to the other end of the first connecting assembly, and the second connecting assembly being connected to the second end of the knife rod; and a handle assembly being connected to the other end of the second connecting assembly.

[0008] In some embodiments, the first connecting assembly includes: a first connecting sleeve, connected to one end of the sleeve assembly near the second end; a second connecting sleeve, sleeved on the first connecting sleeve; the second connecting assembly includes: a third connecting sleeve, connected to the handle assembly, the third connecting sleeve is connected to the second end of the knife rod, and the third connecting sleeve is detachably connected to the first connecting sleeve; a fourth connecting sleeve, sleeved on the third connecting sleeve, the fourth connecting sleeve is connected to the handle assembly, and the fourth connecting sleeve is detachably connected to the second connecting sleeve.

[0009] In some embodiments, the first connecting sleeve includes: a first connecting sleeve, connected to one end of the sleeve assembly close to the second end, the outer wall of the first connecting sleeve is connected to a first positioning protrusion, the first positioning protrusion is elastic so that the first positioning protrusion can move toward the cavity, and the height of the first positioning protrusion gradually decreases from the first end to the second end; a second connecting sleeve, sleeved on the first connecting sleeve, the second connecting sleeve is sleeved on the second connecting sleeve, and the second connecting sleeve is connected to the second connecting sleeve, and the side wall of the second connecting sleeve has a first positioning hole; wherein, the third connecting sleeve is sleeved on the second connecting sleeve, the outer wall of the third connecting sleeve has a second positioning hole, and the first positioning protrusion extends out of the first positioning hole and the second positioning hole in sequence.

[0010] In some embodiments, the inner side wall of the second connecting sleeve has a second positioning protrusion, which forms a step on the inner side wall of the second connecting sleeve. The outer side wall of the second connecting sleeve has a third positioning protrusion, which is clamped on the step.

[0011] In some embodiments, the first connecting assembly also includes: a positioning plate, connected to one end of the sleeve assembly close to the second end, the first connecting sleeve and the second connecting sleeve are located on the side of the positioning plate close to the handle assembly, the positioning plate has a positioning pin on the side facing the handle assembly, the positioning pin is inserted into the first positioning groove of the fourth connecting sleeve, the positioning plate has a notch to avoid the second positioning protrusion, and the outer wall of the positioning plate is clamped at the step.

[0012] In some embodiments, the sleeve assembly includes: an inner tube, the cavity is located in the inner tube, and the first connecting sleeve is connected to one end of the inner tube close to the second end; an outer tube, sleeved on the inner tube, and the positioning plate is connected to one end of the outer tube close to the second end.

[0013] In some embodiments, the inner side wall of the second connecting sleeve has a first mounting groove, and the first connecting component also includes: an elastic element, which is sleeved on the sleeve component, and the elastic element is located in the first mounting groove. The opposite ends of the elastic element along the first direction are respectively against the inner side wall of the first mounting groove and the positioning plate.

[0014] In some embodiments, the second connecting sleeve has a first mounting protrusion at one end facing the handle assembly, and the first mounting protrusion is elastic so that the first mounting protrusion can move toward the cavity; the fourth connecting sleeve is arranged on the second connecting sleeve, and the inner side wall of the fourth connecting sleeve has a second mounting groove, and the first mounting protrusion is located in the second mounting groove; the fourth connecting sleeve has a first mounting hole that passes through the side wall of the fourth connecting sleeve, and the first mounting hole is connected to the second mounting groove. The outer side wall of the fourth connecting sleeve is also connected to a pressing protrusion, which extends into the first mounting hole and contacts the first mounting protrusion.

[0015] In some embodiments, the outer side wall of the second connecting sleeve has a first anti-rotation plane, the inner side wall of the fourth connecting sleeve has a second anti-rotation plane, and the first anti-rotation plane and the second anti-rotation plane are in contact with each other.

[0016] In some embodiments, the fourth connecting sleeve is arranged on the second connecting sleeve; the outer wall of the second connecting sleeve is connected to the second mounting protrusion, and the second mounting protrusion is elastic so that the second mounting protrusion can move toward the cavity; there is a second mounting hole on the side wall of the fourth connecting sleeve, and the second mounting protrusion is located in the second mounting hole and extends out of the second mounting hole.

[0017] In some embodiments, the fourth connecting sleeve is sleeved on the second connecting sleeve; the outer side wall of the second connecting sleeve is connected to the first rotation slot, the inner side wall of the fourth connecting sleeve is connected to the second rotation slot, and the first rotation slot is located in the second rotation slot.

[0018] In some embodiments, the second connecting sleeve is sleeved on the fourth connecting sleeve; the second connecting sleeve is threadedly connected to the fourth connecting sleeve.

[0019] During installation, the surgical instrument provided in an embodiment of the present application connects the second connecting assembly to the first connecting assembly, thereby connecting the cannula assembly and the knife rod, allowing the surgical instrument to be used for surgery. After the surgery is completed, the second connecting assembly and the first connecting assembly are disassembled, allowing the cannula assembly and the knife rod to be disassembled. Since dirt may enter the space between the knife rod and the cannula assembly during surgery, the cannula assembly and the knife rod can be disassembled to allow the knife rod to be cleaned. After cleaning, the cleaned knife rod can be put back into use without having to be discarded, thereby reducing resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the drawings without paying creative work.

[0021] FIG1 shows a schematic structural diagram of a surgical instrument provided in an embodiment of the present application;

[0022] FIG2 shows an exploded schematic diagram of a surgical instrument provided in an embodiment of the present application;

[0023] FIG3 shows another exploded schematic diagram of a surgical instrument provided by an embodiment of the present application;

[0024] FIG4 is an enlarged view of point A in FIG3 ;

[0025] FIG5 shows a partial connection diagram of a first connecting sleeve provided in an embodiment of the present application;

[0026] FIG6 shows a partial cross-sectional schematic diagram of a surgical instrument provided in an embodiment of the present application;

[0027] FIG7 shows a cross-sectional schematic diagram of a second connecting sleeve provided in an embodiment of the present application;

[0028] FIG8 shows a left side view of a positioning plate provided in an embodiment of the present application;

[0029] FIG9 shows a left side view of a fourth connecting sleeve provided in an embodiment of the present application;

[0030] FIG10 shows a cross-sectional schematic diagram of the cooperation between a fourth connecting sleeve and a second connecting sleeve provided in an embodiment of the present application;

[0031] FIG11 shows a schematic structural diagram of another surgical instrument provided in an embodiment of the present application;

[0032] FIG12 is a schematic structural diagram of a second connecting sleeve of another surgical instrument provided in an embodiment of the present application;

[0033] FIG13 is a schematic structural diagram of a second connecting assembly of another surgical instrument provided in an embodiment of the present application;

[0034] FIG14 shows a schematic structural diagram of another surgical instrument provided in an embodiment of the present application;

[0035] FIG15 is a schematic diagram showing a partial structure of a second connecting assembly of another surgical instrument provided in an embodiment of the present application;

[0036] FIG16 shows a schematic structural diagram of another surgical instrument provided in an embodiment of the present application;

[0037] FIG17 shows a diagram illustrating the connection process of a second connecting sleeve and a fourth connecting sleeve of another surgical instrument provided in an embodiment of the present application.

[0038] Explanation of the reference numerals: 10, knife bar; 11, first end; 12, second end; 20, sleeve assembly; 21, inner tube; 22, outer tube; 23, nozzle; 30, first connecting assembly; 31, first connecting sleeve; 32, second connecting sleeve; 33, positioning plate; 34, elastic element; 311, first connecting sleeve; 3111, first positioning protrusion; 3112, spring piece; 312, second connecting sleeve; 3121, first positioning hole; 3122, third positioning protrusion; 3123, fourth positioning protrusion; 321, second positioning protrusion; 322, first mounting groove; 323, first mounting protrusion; 324, first anti-rotation plane; 325, second mounting Protrusion; 326, first rotation slot; 331, positioning pin; 332, notch; 3211, second positioning groove; 40, second connecting assembly; 41, third connecting sleeve; 42, fourth connecting sleeve; 411, second positioning hole; 421, second mounting groove; 422, first mounting hole; 423, pressing protrusion; 424, second anti-rotation plane; 425, second mounting hole; 426, first positioning groove; 50, handle assembly; 51, housing; 52, grip ring; 53, switch; 60, connecting sleeve. DETAILED DESCRIPTION

[0039] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0040] An embodiment of the present application provides a surgical instrument. FIG1 shows a schematic structural diagram of a surgical instrument according to an embodiment of the present application. FIG2 shows an exploded schematic diagram of a surgical instrument according to an embodiment of the present application. FIG3 shows another exploded schematic diagram of a surgical instrument according to an embodiment of the present application. To clearly illustrate the internal structure of the surgical instrument, the exploded views of FIG2 and FIG3 show partial cross-sectional views. In conjunction with FIG1 to FIG3 , the surgical instrument includes a shank 10, a cannula assembly 20, a first connecting assembly 30, a second connecting assembly 40, and a handle assembly 50. The shank 10 has a first end 11 and a second end 12 arranged along a first direction X. The cannula assembly 20 has a cavity extending along the first direction X. The cannula assembly 20 is sleeved on the shank 10, with the first end 11 extending out of the cavity. One end of the first connecting assembly 30 is connected to an end of the cannula assembly 20 near the second end 12. One end of the second connecting assembly 40 is detachably connected to the other end of the first connecting assembly 30. The second connecting assembly 40 is connected to the second end 12 of the shank 10. The handle assembly 50 is connected to the other end of the second connecting assembly 40.

[0041] In the embodiment of the present application, the first end 11 of the knife rod 10 extends out of the cavity, so that the first end 11 of the knife rod 10 can be operated during surgery.

[0042] Exemplarily, the shank 10 may be made of a material with high thermal strength and good corrosion resistance, such as titanium alloy.

[0043] In an embodiment of the present application, the handle assembly 50 is connected to the other end of the second connecting assembly 40, and the second connecting assembly 40 is connected to the second end 12 of the knife rod 10, that is, the handle assembly 50 and the knife rod 10 are connected through the second connecting assembly 40, so that the knife rod 10 can be operated through the handle assembly 50.

[0044] Referring to Figure 1 , the handle assembly 50 includes a housing 51, a grip ring 52, and an on / off switch 53. The housing 51 is the entire main body of the handle assembly 50, and control components and the like can be located within the housing 51. The grip ring 52 can be linked to the shank 10 or cannula assembly 20 to control the movement of the shank 10 or cannula assembly 20, and the on / off switch 53 can control the opening and closing of the surgical instrument.

[0045] For example, the handle assembly 50 may be made of a material having the physical property of being resistant to high-temperature sterilization and the chemical property of not releasing undesirable components at high temperatures, such as a polymer material.

[0046] For example, the shell 51 may be made of a plastic-coated metal plate to increase the strength of the plastic part during high-temperature sterilization.

[0047] In an embodiment of the present application, one end of the first connecting component 30 is connected to the end of the sleeve assembly 20 near the second end 12, one end of the second connecting component 40 is detachably connected to the other end of the first connecting component 30, and the handle assembly 50 is connected to the other end of the second connecting component 40, that is, the connection between the sleeve assembly 20 and the handle assembly 50 is realized through the first connecting component 30 and the second connecting component 40, so that the sleeve assembly 20 can be operated by the handle assembly 50.

[0048] At the same time, the second connecting component 40 is connected to the second end 12 of the knife rod 10, that is, the connection between the sleeve component 20 and the knife rod 10 is realized through the first connecting component 30 and the second connecting component 40, so that the sleeve component 20 and the knife rod 10 are relatively stable during the operation.

[0049] For example, the first connection component 30 or the second connection component 40 can be made of a material having physical properties of high strength and resistance to high temperature sterilization and chemical properties of not releasing undesirable components at high temperatures, such as a polymer material.

[0050] In an embodiment of the present application, during installation, the second connecting assembly 40 is connected to the first connecting assembly 30 to connect the cannula assembly 20 and the knife rod 10, allowing the surgical instrument to be used for surgery. After the surgery is completed, the second connecting assembly 40 and the first connecting assembly 30 are disassembled, allowing the cannula assembly 20 and the knife rod 10 to be disassembled. Since dirt may enter the space between the knife rod 10 and the cannula assembly 20 during the surgery, after the cannula assembly 20 and the knife rod 10 are disassembled, the knife rod 10 can be cleaned. After cleaning, the knife rod 10 can be put back into use without being discarded, thereby reducing resource waste.

[0051] Meanwhile, in related technologies, surgical instruments are not detachable, and patients need to purchase a complete set of surgical instruments before undergoing surgery. The surgical instrument provided in the embodiment of the present application can reuse the knife bar 10 after cleaning, thereby reducing the cost of surgical instruments and alleviating the financial burden on the patient.

[0052] FIG4 is an enlarged view of point A in FIG3 . Referring to FIG2 to FIG4 , the first connecting assembly 30 includes a first connecting sleeve 31 and a second connecting sleeve 32. The first connecting sleeve 31 is connected to the end of the sleeve assembly 20 near the second end 12, and the second connecting sleeve 32 is sleeved on the first connecting sleeve 31. Referring to FIG2 and FIG3 , the second connecting assembly 40 includes a third connecting sleeve 41 and a fourth connecting sleeve 42. The third connecting sleeve 41 is connected to the handle assembly 50, and the third connecting sleeve 41 is connected to the second end 12 of the arbor 10. The third connecting sleeve 41 is detachably connected to the first connecting sleeve 31, and the fourth connecting sleeve 42 is sleeved on the third connecting sleeve 41. The fourth connecting sleeve 42 is connected to the handle assembly 50, and the fourth connecting sleeve 42 is detachably connected to the second connecting sleeve 32.

[0053] In an embodiment of the present application, the third connecting sleeve 41 is connected to the handle assembly 50 , and the third connecting sleeve 41 is connected to the second end 12 of the knife rod 10 , that is, the knife rod 10 is connected to the handle assembly 50 through the third connecting sleeve 41 .

[0054] In the embodiment of the present application, the third connecting sleeve 41 is detachably connected to the first connecting sleeve 31, and the fourth connecting sleeve 42 is detachably connected to the second connecting sleeve 32. That is, the first connecting assembly 30 and the second connecting assembly 40 are detachably connected in two layers. This can improve the stability of the first connecting assembly 30 and the second connecting assembly 40 when connected, thereby ensuring the relative stability of the cannula assembly 20 and the knife rod 10 during surgery. At the same time, it will not affect the disassembly of the first connecting assembly 30 and the second connecting assembly 40, so that the cannula assembly 20 and the knife rod 10 can be disassembled and the knife rod 10 can be cleaned, thereby reducing resource waste.

[0055] Referring to Figures 2 to 4, the first connecting sleeve 31 includes a first connecting sleeve 311 and a second connecting sleeve 312. Figure 5 shows a partial connection schematic diagram of a first connecting sleeve provided in an embodiment of the present application. In conjunction with Figures 2 to 5, the first connecting sleeve 311 is connected to the end of the sleeve assembly 20 close to the second end 12, and the outer wall of the first connecting sleeve 311 is connected to a first positioning protrusion 3111. The first positioning protrusion 3111 is elastic so that the first positioning protrusion 3111 can move toward the cavity, and the height of the first positioning protrusion 3111 gradually decreases from the first end 11 to the second end 12. The second connecting sleeve 312 is sleeved on the first connecting sleeve 311, and the second connecting sleeve 32 is sleeved on the second connecting sleeve 312, and the second connecting sleeve 32 is connected to the second connecting sleeve 312. The side wall of the second connecting sleeve 312 has a first positioning hole 3121. The third connecting sleeve 41 is sleeved on the second connecting shaft sleeve 312 . The outer wall of the third connecting sleeve 41 has a second positioning hole 411 . The first positioning protrusion 3111 extends out of the first positioning hole 3121 and the second positioning hole 411 in sequence.

[0056] In one embodiment of the present application, a ¾-circular annular square hole can be provided on the outer sidewall of the first connecting sleeve 311, so that the sidewall of the first connecting sleeve 311 forms a square spring piece 3112. The first positioning protrusion 3111 is connected to the spring piece 3112, so that the first positioning protrusion 3111 is elastic and can move toward the cavity. For example, the first positioning protrusion 3111 can be bonded or welded to the spring piece 3112, or the first positioning protrusion 3111 and the spring piece 3112 can be integrally formed.

[0057] In an embodiment of the present application, the spring piece 3112 may also be in other forms. For example, a circular hole, a triangular hole, an oblong hole or other special-shaped hole that is not a full circle is set on the outer wall of the first connecting sleeve 311, so that the side wall of the first connecting sleeve 311 forms a spring piece 3112.

[0058] In an embodiment of the present application, the height of the first positioning protrusion 3111 gradually decreases from the first end 11 to the second end 12. From the view shown in Figure 5, the cross-sectional shape of the first positioning protrusion 3111 is a trapezoid. In other implementations, the cross-sectional shape of the first positioning protrusion 3111 is a triangle.

[0059] In an embodiment of the present application, when installing the first connecting sleeve 31 and the third connecting sleeve 41, the first connecting sleeve 311 is first connected to the sleeve assembly 20, and then the second connecting sleeve 312 is sleeved on the first connecting sleeve 311 so that the first positioning protrusion 3111 extends out of the first positioning hole 3121, and then the third connecting sleeve 41 is sleeved on the second connecting sleeve 312. The first positioning protrusion 3111 has the elasticity to move toward the cavity, ensuring that the third connecting sleeve 41 can be smoothly sleeved on the second connecting sleeve 312. When the first positioning protrusion 3111 moves to the second positioning hole 411, the first positioning protrusion 3111 extends out of the second positioning hole 411, thereby connecting the first connecting sleeve 31 and the third connecting sleeve 41 together.

[0060] In an embodiment of the present application, when the first connecting sleeve 31 and the third connecting sleeve 41 are disassembled, since the second connecting sleeve 32 is connected to the second connecting shaft sleeve 312, the second connecting sleeve 32 can be controlled to move along the first direction X toward the first end 11, and the second connecting sleeve 32 drives the second connecting shaft sleeve 312 to move in the first direction X toward the first end 11. During the movement of the second connecting shaft sleeve 312, the positional relationship between the first positioning hole 3121 and the first positioning protrusion 3111 changes, and the side wall of the second connecting shaft sleeve 312 slowly squeezes the first positioning protrusion 3111, so that the first positioning protrusion 3111 moves toward the cavity, that is, the connection between the first connecting sleeve 31 and the third connecting sleeve 41 is released, thereby disassembling the first connecting sleeve 31 and the third connecting sleeve 41.

[0061] In the embodiment of the present application, the above-mentioned design can make the first positioning protrusion 3111 cooperate with the second positioning hole 411 to connect the first connecting sleeve 31 and the third connecting sleeve 41 together. At the same time, the first connecting sleeve 31 and the third connecting sleeve 41 can be disassembled by controlling the movement of the second connecting sleeve 32. The installation and disassembly are relatively convenient, saving the time of disassembly and installation.

[0062] Figure 6 shows a partial cross-sectional view of a surgical instrument provided in an embodiment of the present application. Referring to Figures 4 and 6 , the inner sidewall of the second connecting sleeve 32 has a second positioning protrusion 321, which creates a step on the inner sidewall of the second connecting sleeve 32. The outer sidewall of the second connecting sleeve 312 has a third positioning protrusion 3122, which is secured to the step.

[0063] Figure 7 shows a cross-sectional schematic diagram of a second connecting sleeve provided in an embodiment of the present application. Referring to Figure 7 , the second connecting sleeve 32 may include two second positioning protrusions 321, which are arranged radially opposite to each other along the second connecting sleeve 32. Similarly, referring to Figures 4 and 6 , the outer wall of the second connecting sleeve 312 has two third positioning protrusions 3122, which are arranged radially opposite to each other along the second connecting sleeve 312, such that the two third positioning protrusions 3122 are respectively secured to the steps formed by the two second positioning protrusions 321.

[0064] In the embodiment of the present application, when installing the second connecting sleeve 32 and the second connecting shaft sleeve 312, the second connecting sleeve 32 or the second connecting shaft sleeve 312 can be rotated first so that the second positioning protrusion 321 and the third positioning protrusion 3122 are staggered with each other, and then the third positioning protrusion 3122 is extended into the inner cavity of the second connecting sleeve 32. Then, the second connecting sleeve 32 or the second connecting shaft sleeve 312 is rotated so that the third positioning protrusion 3122 is stuck on the step formed by the second positioning protrusion 321, thereby completing the installation of the second connecting sleeve 32 and the second connecting shaft sleeve 312. When removing the second connecting sleeve 32 and the second connecting shaft sleeve 312, the second connecting sleeve 32 or the second connecting shaft sleeve 312 is rotated again so that the second positioning protrusion 321 and the third positioning protrusion 3122 are staggered with each other, and then the third positioning protrusion 3122 is pulled out from the inner cavity of the second connecting sleeve 32, thereby completing the removal of the second connecting sleeve 32 and the second connecting shaft sleeve 312.

[0065] In an embodiment of the present application, the connection between the second connecting sleeve 32 and the second connecting shaft sleeve 312 can be achieved by setting the second positioning protrusion 321 and the third positioning protrusion 3122, ensuring that when the second connecting sleeve 32 moves, the second connecting shaft sleeve 312 can be driven to move, and at the same time, the second connecting sleeve 32 and the second connecting shaft sleeve 312 can be disassembled to achieve the disassembly of the second connecting sleeve 32 and the first connecting sleeve 31.

[0066] 4 to 6 , the outer sidewall of the second connecting sleeve 312 may further include a fourth positioning protrusion 3123. The fourth positioning protrusion 3123 and the at least one third positioning protrusion 3122 are arranged along the first direction X, and the fourth positioning protrusion 3123 is close to the handle assembly 50. The fourth positioning protrusion 3123 is located outside the inner cavity of the second connecting sleeve 32. The fourth positioning protrusion 3123 can limit the movement of the second connecting sleeve 312. When the second connecting sleeve 312 moves toward the first end 11 along the first direction X, the fourth positioning protrusion 3123 will abut against the outer shell of the second connecting sleeve 32, thereby limiting the further movement of the second connecting sleeve 312 and preventing the second connecting sleeve 312 from moving into the interior of the second connecting sleeve 32 and colliding with other components.

[0067] Referring to Figures 2 to 6, the first connecting assembly 30 also includes a positioning plate 33, which is connected to the end of the sleeve assembly 20 near the second end 12, and the first connecting sleeve 311 and the second connecting sleeve 312 are located on the side of the positioning plate 33 near the handle assembly 50. Figure 8 shows a left view of a positioning plate provided in an embodiment of the present application. Referring to Figure 8, the positioning plate 33 has a positioning pin 331 on the side facing the handle assembly 50, and the positioning plate 33 has a notch 332 for avoiding the second positioning protrusion 321, and the outer wall of the positioning plate 33 is clamped at the step. Figure 9 shows a left view of a fourth connecting sleeve provided in an embodiment of the present application. In combination with Figures 2, 8 and 9, the positioning pin 331 is inserted into the first positioning groove 426 of the fourth connecting sleeve 42.

[0068] Referring to Figure 6, the second positioning protrusion 321 has a second positioning groove 3211, so that the second connecting sleeve 32, the second positioning groove 3211 and the second positioning protrusion 321 form two continuous steps. The outer wall of the positioning plate 33 is clamped at the step away from the handle assembly 50, and the third positioning protrusion 3122 is clamped at the step close to the handle assembly 50 to avoid interference between the positioning plate 33 and the third positioning protrusion 3122.

[0069] In an embodiment of the present application, when installing the second connecting sleeve 32 and the positioning plate 33, the positioning plate 33 is first installed on the end of the sleeve assembly 20 near the second end 12. Then, from the side of the positioning plate 33 near the handle assembly 50, the first connecting sleeve 311 and the second connecting sleeve 312 are connected to the end of the sleeve assembly 20 near the second end 12. Then, the second connecting sleeve 32 or the positioning plate 33 can be rotated so that the notch 332 is opposite the second positioning protrusion 321, and then a portion of the positioning plate 33 is extended into the inner cavity of the second connecting sleeve 32. Then, the second connecting sleeve 32 or the positioning plate 33 is rotated so that the notch 332 and the second positioning protrusion 321 are staggered, and the outer wall of the positioning plate 33 is clamped on the step to achieve the connection between the second connecting sleeve 32 and the positioning plate 33. After the second connecting sleeve 32 and the positioning plate 33 are installed, the second connecting sleeve 32 and the second connecting sleeve 312 can be installed using the above-mentioned installation method for the second connecting sleeve 32 and the second connecting sleeve 312.

[0070] In the embodiment of the present application, when disassembling the second connecting sleeve 32 and the positioning plate 33, the above-mentioned method for disassembling the second connecting sleeve 32 and the second connecting sleeve 312 can be used to disassemble the second connecting sleeve 32 and the second connecting sleeve 312. Then, the second connecting sleeve 32 or the positioning plate 33 is rotated so that the notch 332 is aligned with the second positioning protrusion 321, and the positioning plate 33 is then pulled out of the inner cavity of the second connecting sleeve 32, completing the disassembly of the second connecting sleeve 32 and the positioning plate 33.

[0071] In an embodiment of the present application, after the first connecting sleeve 31, the second connecting sleeve 32 and the positioning plate 33 are installed, the third connecting sleeve 41 can be mounted on the first connecting shaft sleeve 311 of the first connecting sleeve 31, and the positioning pin 331 can be inserted into the first positioning groove 426 of the fourth connecting sleeve 42 to prevent the first connecting component 30 and the second connecting component 40 from rotating relative to each other, thereby ensuring that the knife rod 10 and the sleeve assembly 20 are relatively stable during the operation.

[0072] In an embodiment of the present application, two positioning pins 331 can be set on the positioning plate 33, and correspondingly, the fourth connecting sleeve 42 has two first positioning grooves 426. The lengths of the two positioning pins 331 are different, and the depths of the two first positioning grooves 426 corresponding to the two positioning pins 331 are also different, thereby avoiding reverse insertion during insertion and achieving fool-proofing.

[0073] 2 to 4 , the sleeve assembly 20 includes an inner tube 21 and an outer tube 22. The cavity is located in the inner tube 21, the first connecting sleeve 311 is connected to the end of the inner tube 21 near the second end 12, the outer tube 22 is sleeved on the inner tube 21, and the positioning plate 33 is connected to the end of the outer tube 22 near the second end 12.

[0074] In the embodiment of the present application, the first connecting sleeve 311 and the inner tube 21 can be connected by welding, bonding or interference fit. The positioning plate 33 and the outer tube 22 can also be connected by welding, bonding or interference fit.

[0075] In an embodiment of the present application, the sleeve assembly 20 is configured in the form of an inner tube 21 and an outer tube 22, and the first connecting sleeve 311 is connected to the inner tube 21, and the positioning plate 33 is connected to the outer tube 22, so that the first connecting sleeve 311 and the positioning plate 33 do not interfere with each other when they are respectively connected to the sleeve assembly 20.

[0076] 2 and 3 , the cannula assembly 20 further includes a clamping nozzle 23 , which is connected to the outer tube 22 and is rotatable, with the rotation axis of the clamping nozzle 23 being perpendicular to the first direction X. In the embodiment of the present application, the grip ring 52 controls the movement of the inner tube 21 along the first direction X, thereby rotating the clamping nozzle 23 . When the clamping nozzle 23 rotates, it cooperates with the first end 11 of the knife rod 10 to achieve a clamping action during surgery.

[0077] In the embodiment of the present invention, a clamping pad may be arranged on the clamping nozzle 23 to increase cushioning.

[0078] For example, the inner tube 21 and the outer tube 22 may be made of a material that is resistant to oxidation, high in strength, and resistant to corrosion, such as stainless steel.

[0079] In combination with Figures 2 to 4 and Figure 6, the inner side wall of the second connecting sleeve 32 has a first mounting groove 322, and the first connecting component 30 also includes an elastic element 34, which is sleeved on the sleeve component 20, and the elastic element 34 is located in the first mounting groove 322. The opposite ends of the elastic element 34 along the first direction X are respectively against the inner side wall of the first mounting groove 322 and the positioning plate 33.

[0080] In the embodiment of the present application, the elastic element 34 is sleeved on the outer tube 22 .

[0081] For example, the elastic element 34 may include a spring.

[0082] In an embodiment of the present application, an elastic element 34 is provided, and the opposite ends of the elastic element 34 along the first direction X respectively abut against the inner wall of the first mounting groove 322 and the positioning plate 33, so that the positioning plate 33 abuts against the step formed by the second positioning protrusion 321 on the inner wall of the second connecting sleeve 32. When the sleeve assembly 20 rotates, the second connecting sleeve 32 is abutted by the positioning plate 33 and cannot rotate relative to each other. At the same time, the positioning plate 33 and the fourth connecting sleeve 42 cannot rotate relative to each other, thereby preventing the sleeve assembly 20 and the fourth connecting sleeve 42 from rotating relative to each other, thereby improving the safety of the operation.

[0083] Referring to Figures 4 and 6, the second connecting sleeve 32 has a first mounting protrusion 323 at one end facing the handle assembly 50, and the first mounting protrusion 323 is elastic so that the first mounting protrusion 323 can move toward the cavity. Figure 10 shows a cross-sectional schematic diagram of the cooperation between a fourth connecting sleeve and a second connecting sleeve provided in an embodiment of the present application. In combination with Figures 2, 3 and 10, the fourth connecting sleeve 42 is sleeved on the second connecting sleeve 32, and the inner side wall of the fourth connecting sleeve 42 has a second mounting groove 421, and the first mounting protrusion 323 is located in the second mounting groove 421. Referring to Figure 10, the fourth connecting sleeve 42 has a first mounting hole 422 that passes through the side wall of the fourth connecting sleeve 42, and the first mounting hole 422 is connected to the second mounting groove 421. The outer side wall of the fourth connecting sleeve 42 is also connected to a pressing protrusion 423, and the pressing protrusion 423 extends into the first mounting hole 422 and contacts the first mounting protrusion 323.

[0084] In the embodiment itself, the second connecting sleeve 32 has an inner cavity, and the end of the second connecting sleeve 32 facing the handle assembly 50 can be made of elastic material. When the first mounting protrusion 323 is pressed, the first mounting protrusion 323 can move toward the cavity, that is, the first mounting protrusion 323 is elastic.

[0085] In some embodiments of the present application, the pressing protrusion 423 may be made of silicone material, which provides a better hand feel when pressing the pressing protrusion 423 .

[0086] In other embodiments of the present application, the material of the pressing protrusion 423 may also include thermoplastic polyurethane elastomer (TPU) or thermoplastic elastomer (TPE), may also include hard polymer materials, and may also include metal materials. The embodiments of the present application are not limited to this.

[0087] In the embodiment of the present application, when installing the second connecting sleeve 32 and the fourth connecting sleeve 42, the first mounting protrusion 323 of the second connecting sleeve 32 is inserted into the inner cavity of the fourth connecting sleeve 42 from the end of the fourth connecting sleeve 42 away from the handle assembly 50, and the first mounting protrusion 323 is snapped into the second mounting groove 421, thereby achieving the connection between the second connecting sleeve 32 and the fourth connecting sleeve 42. When removing the second connecting sleeve 32 and the fourth connecting sleeve 42, the pressing protrusion 423 is pressed, so that the pressing protrusion 423 pushes the first mounting protrusion 323 toward the cavity, and then moves along the first direction X toward the first end 11 past the second connecting sleeve 32 to achieve the removal of the second connecting sleeve 32 and the fourth connecting sleeve 42. This makes it easy to install and remove the second connecting sleeve 32 and the fourth connecting sleeve 42, saving time for disassembly and installation.

[0088] 6 and 10 , the height of the first mounting protrusion 323 gradually decreases from the first end 11 to the second end 12 .

[0089] In the embodiment of the present application, the height of the first mounting protrusion 323 near the second end 12 is relatively short. When the second connecting sleeve 32 and the fourth connecting sleeve 42 are installed, the end of the first mounting protrusion 323 near the second end 12 first enters the inner cavity of the fourth connecting sleeve 42, so that the inner side wall of the fourth connecting sleeve 42 can move in accordance with the outer side wall of the first mounting protrusion 323 and gradually squeeze the first mounting protrusion 323, so that the entire first mounting protrusion 323 enters the inner cavity of the fourth connecting sleeve 42, without the need to press the first mounting protrusion 323 additionally, which is more convenient.

[0090] In other implementations, the height of the first mounting protrusion 323 may also be constant, or the shape of the first mounting protrusion 323 may adopt other forms, which is not limited in the embodiments of the present application.

[0091] 7 , the outer sidewall of the second connecting sleeve 32 has a first anti-rotation plane 324 . Referring to FIG. 9 , the inner sidewall of the fourth connecting sleeve 42 has a second anti-rotation plane 424 . The first anti-rotation plane 324 and the second anti-rotation plane 424 fit together.

[0092] In the embodiment of the present application, the first anti-rotation plane 324 and the second anti-rotation plane 424 fit together to prevent the second connecting sleeve 32 and the fourth connecting sleeve 42 from rotating relative to each other, thereby avoiding affecting the safety of the operation.

[0093] In other implementations, the first anti-rotation plane 324 may not be provided on the outer wall of the second connecting sleeve 32, and accordingly, the second anti-rotation plane 424 may not be provided on the inner wall of the fourth connecting sleeve 42. The embodiments of the present application do not limit this.

[0094] 10 , the surgical instrument further includes a connecting sleeve 60 , which is used to connect the fourth connecting sleeve 42 and the handle assembly 50 .

[0095] Figure 11 shows a schematic diagram of the structure of another surgical instrument provided in an embodiment of the present application. Figure 12 shows a schematic diagram of the structure of the second connecting sleeve of another surgical instrument provided in an embodiment of the present application. Figure 13 shows a schematic diagram of the structure of the second connecting assembly of another surgical instrument provided in an embodiment of the present application. In conjunction with Figures 11 to 13, the fourth connecting sleeve 42 is sleeved on the second connecting sleeve 32. The outer side wall of the second connecting sleeve 32 is connected to a second mounting protrusion 325, and the second mounting protrusion 325 is elastic so that the second mounting protrusion 325 can move toward the cavity. A second mounting hole 425 is provided on the side wall of the fourth connecting sleeve 42, and the second mounting protrusion 325 is located in the second mounting hole 425 and extends out of the second mounting hole 425.

[0096] In the embodiment of the present application, when installing the fourth connecting sleeve 42 and the second connecting sleeve 32, the end of the second connecting sleeve 32 facing the fourth connecting sleeve 42 can be extended into the inner cavity of the fourth connecting sleeve 42, so that the second mounting protrusion 325 is engaged with the second mounting hole 425, thereby achieving installation of the fourth connecting sleeve 42 and the second connecting sleeve 32. When removing the fourth connecting sleeve 42 and the second connecting sleeve 32, the second mounting protrusion 325 can be pressed in the second mounting hole 425, and then the second connecting sleeve 32 can be moved along the first direction X to achieve removal of the fourth connecting sleeve 42 and the second connecting sleeve 32. This disassembly and installation method is relatively simple and easy to operate, and can also save disassembly and installation time.

[0097] Figure 14 is a schematic diagram of the structure of another surgical instrument provided in an embodiment of the present application. Figure 15 is a schematic diagram of the partial structure of the second connecting assembly of another surgical instrument provided in an embodiment of the present application. In conjunction with Figures 14 and 15 , the fourth connecting sleeve 42 is sleeved onto the second connecting sleeve 32. The outer wall of the second connecting sleeve 32 is connected to a first rotation slot 326, and the inner wall of the fourth connecting sleeve 42 is connected to a second rotation slot. The first rotation slot 326 is located within the second rotation slot.

[0098] In the embodiment of the present application, the second rotation slot is located inside the fourth connecting sleeve 42 and is not shown.

[0099] In the embodiment of the present application, when installing the fourth connecting sleeve 42 and the second connecting sleeve 32, the end of the second connecting sleeve 32 facing the fourth connecting sleeve 42 can be inserted into the inner cavity of the fourth connecting sleeve 42, and then the fourth connecting sleeve 42 or the second connecting sleeve 32 can be rotated so that the first rotating slot 326 is locked in the second rotating slot, thereby achieving installation of the fourth connecting sleeve 42 and the second connecting sleeve 32. When removing the fourth connecting sleeve 42 and the second connecting sleeve 32, the fourth connecting sleeve 42 or the second connecting sleeve 32 can be rotated again so that the first rotating slot 326 is locked in the second rotating slot and is misaligned, and then the second connecting sleeve 32 can be moved along the first direction X to achieve removal of the fourth connecting sleeve 42 and the second connecting sleeve 32. This disassembly and installation method is relatively simple and easy to operate, and can also save time for disassembly and installation.

[0100] Figure 16 shows a schematic diagram of the structure of another surgical instrument provided in an embodiment of the present application. Figure 17 shows a diagram illustrating the connection process of the second and fourth connecting sleeves of another surgical instrument provided in an embodiment of the present application. Referring to Figures 16 and 17, the second connecting sleeve 32 is sleeved on the fourth connecting sleeve 42, and the second connecting sleeve 32 and the fourth connecting sleeve 42 are threadedly connected.

[0101] In the embodiment of the present application, when installing the fourth connecting sleeve 42 and the second connecting sleeve 32, the first connecting sleeve 31 and the positioning plate 33 are first connected to the sleeve assembly 20. Then, the entirety of the first connecting sleeve 31, the positioning plate 33, and the sleeve assembly 20 is inserted into the inner cavity of the fourth connecting sleeve 42. Finally, the second connecting sleeve 32 is threadedly connected to the fourth connecting sleeve 42. When removing the fourth connecting sleeve 42 and the second connecting sleeve 32, the fourth connecting sleeve 42 or the second connecting sleeve 32 is simply rotated to unthread the threads, thereby removing the fourth connecting sleeve 42 and the second connecting sleeve 32. This disassembly and installation method is relatively simple and easy to operate, while also saving disassembly and installation time.

[0102] In the second connecting sleeve 312 shown in Figures 2 and 3, the first positioning hole 3121 extends to the end of the second connecting sleeve 312 away from the handle assembly 50. In the second connecting sleeve 312 shown in Figure 17, the first positioning hole 3121 does not extend to the end of the second connecting sleeve 312 away from the handle assembly 50. The surgical instrument provided in the embodiment of the present application can include either of the two structural forms of the second connecting sleeve 312 described above, and the embodiments of the present application are not limited thereto.

[0103] Exemplarily, the surgical instrument provided in the embodiment of the present application may be an ultrasonic instrument, such as an ultrasonic scalpel, which activates or excites the end actuator of the ultrasonic scalpel (e.g., the first end 11 of the scalpel rod 10) at an ultrasonic frequency, such as a cutting scalpel, to induce longitudinal vibrations, which generate local heat in adjacent tissues, thereby promoting cutting and coagulation.

[0104] It should be understood that in this specification, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships or dimensions based on the orientations or positional relationships or dimensions shown in the accompanying drawings, and these terms are used only for the convenience of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of this application.

[0105] Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first," "second," or "third" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0106] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0107] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0108] This specification provides many different embodiments or examples that can be used to implement the present application. It should be understood that these different embodiments or examples are purely exemplary and are not intended to limit the scope of protection of the present application in any way. Those skilled in the art can conceive of various changes or replacements based on the disclosure of the specification of the present application, all of which should be encompassed within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection defined by the appended claims.

Claims

1. A surgical instrument, comprising: A knife bar (10) having a first end (11) and a second end (12) arranged along a first direction; A sleeve assembly (20) having a cavity extending along the first direction, the sleeve assembly (20) being sleeved on the knife rod (10), and the first end (11) extending out of the cavity; a first connecting assembly (30), one end of the first connecting assembly (30) being connected to an end of the sleeve assembly (20) close to the second end (12); a second connecting assembly (40), one end of the second connecting assembly (40) being detachably connected to the other end of the first connecting assembly (30), and the second connecting assembly (40) being connected to the second end (12) of the knife rod (10); The handle assembly (50) is connected to the other end of the second connecting assembly (40).

2. The surgical instrument according to claim 1, wherein The first connecting component (30) comprises: a first connecting sleeve (31) connected to an end of the sleeve assembly (20) close to the second end (12); A second connecting sleeve (32) is sleeved on the first connecting sleeve (31); The second connecting component (40) comprises: a third connecting sleeve (41) connected to the handle assembly (50), the third connecting sleeve (41) connected to the second end (12) of the knife rod (10), and the third connecting sleeve (41) detachably connected to the first connecting sleeve (31); A fourth connecting sleeve (42) is sleeved on the third connecting sleeve (41), the fourth connecting sleeve (42) is connected to the handle assembly (50), and the fourth connecting sleeve (42) is detachably connected to the second connecting sleeve (32).

3. The surgical instrument according to claim 2, wherein: The first connecting sleeve (31) comprises: a first connecting sleeve (311) connected to an end of the sleeve assembly (20) close to the second end (12); a first positioning protrusion (3111) connected to an outer wall of the first connecting sleeve (311); the first positioning protrusion (3111) is elastic so that the first positioning protrusion (3111) can move toward the cavity; and the height of the first positioning protrusion (3111) gradually decreases in a direction from the first end (11) to the second end (12); A second connecting sleeve (312) is sleeved on the first connecting sleeve (311), the second connecting sleeve (32) is sleeved on the second connecting sleeve (312), and the second connecting sleeve (32) is connected to the second connecting sleeve (312), and a side wall of the second connecting sleeve (312) has a first positioning hole (3121); The third connecting sleeve (41) is sleeved on the second connecting shaft sleeve (312), the outer wall of the third connecting sleeve (41) has a second positioning hole (411), and the first positioning protrusion (3111) extends out of the first positioning hole (3121) and the second positioning hole (411) in sequence.

4. The surgical instrument according to claim 3, wherein: The inner side wall of the second connecting sleeve (32) has a second positioning protrusion (321), and the second positioning protrusion (321) forms a step on the inner side wall of the second connecting sleeve (32). The outer side wall of the second connecting sleeve (312) has a third positioning protrusion (3122), and the third positioning protrusion (3122) is clamped on the step.

5. The surgical instrument according to claim 4, wherein: The first connecting component (30) further comprises: A positioning plate (33) is connected to one end of the sleeve assembly (20) close to the second end (12); the first connecting sleeve (311) and the second connecting sleeve (312) are located on a side of the positioning plate (33) close to the handle assembly (50); the positioning plate (33) has a positioning pin (331) on the side facing the handle assembly (50); the positioning pin (331) is inserted into the first positioning groove (426) of the fourth connecting sleeve (42); the positioning plate (33) has a notch (332) for avoiding the second positioning protrusion (321); and the outer wall of the positioning plate (33) is clamped at the step.

6. The surgical instrument according to claim 5, wherein: The sleeve assembly (20) comprises: an inner tube (21), the cavity being located in the inner tube (21), and the first connecting sleeve (311) being connected to an end of the inner tube (21) close to the second end (12); The outer tube (22) is sleeved on the inner tube (21), and the positioning plate (33) is connected to an end of the outer tube (22) close to the second end (12).

7. The surgical instrument according to claim 5 or 6, wherein: The inner side wall of the second connecting sleeve (32) has a first mounting groove (322), and the first connecting assembly (30) further includes: An elastic element (34) is sleeved on the sleeve assembly (20), the elastic element (34) is located in the first mounting groove (322), and the opposite ends of the elastic element (34) along the first direction respectively abut against the inner side wall of the first mounting groove (322) and the positioning plate (33).

8. The surgical instrument according to any one of claims 2 to 7, wherein: The second connecting sleeve (32) has a first mounting protrusion (323) at one end facing the handle assembly (50), and the first mounting protrusion (323) is elastic so that the first mounting protrusion (323) can move toward the cavity; The fourth connecting sleeve (42) is sleeved on the second connecting sleeve (32), the inner side wall of the fourth connecting sleeve (42) has a second mounting groove (421), and the first mounting protrusion (323) is located in the second mounting groove (421); The fourth connecting sleeve (42) has a first mounting hole (422) that passes through the side wall of the fourth connecting sleeve (42), the first mounting hole (422) is connected to the second mounting groove (421), and the outer side wall of the fourth connecting sleeve (42) is also connected to a pressing protrusion (423), and the pressing protrusion (423) extends into the first mounting hole (422) and contacts the first mounting protrusion (323).

9. The surgical instrument according to any one of claims 2 to 8, wherein: The outer side wall of the second connecting sleeve (32) has a first anti-rotation plane (324), the inner side wall of the fourth connecting sleeve (42) has a second anti-rotation plane (424), and the first anti-rotation plane (324) and the second anti-rotation plane (424) are in close contact with each other.

10. The surgical instrument according to any one of claims 2 to 7, wherein: The fourth connecting sleeve (42) is sleeved on the second connecting sleeve (32); The outer side wall of the second connecting sleeve (32) is connected to a second mounting protrusion (325), and the second mounting protrusion (325) is elastic so that the second mounting protrusion (325) can move toward the cavity; the side wall of the fourth connecting sleeve (42) is provided with a second mounting hole (425), and the second mounting protrusion (325) is located in the second mounting hole (425) and extends out of the second mounting hole (425).

11. The surgical instrument according to any one of claims 2 to 7, wherein: The fourth connecting sleeve (42) is sleeved on the second connecting sleeve (32); The outer side wall of the second connecting sleeve (32) is connected to a first rotating slot (326), the inner side wall of the fourth connecting sleeve (42) is connected to a second rotating slot, and the first rotating slot (326) is located inside the second rotating slot.

12. The surgical instrument according to any one of claims 2 to 7, wherein: The second connecting sleeve (32) is sleeved on the fourth connecting sleeve (42); The second connecting sleeve (32) is threadedly connected to the fourth connecting sleeve (42).

Images