Surgical instrument

Abstract

The utility model provides a surgical instrument, and belongs to the technical field of medical instruments. A surgical instrument includes a cutter bar, a cannula assembly, a first connection assembly, a second connection assembly, and a handle assembly. The cutter bar is provided with a first end and a second end which are arranged in the first direction. The sleeve assembly is provided with a cavity extending in the first direction, the sleeve assembly is arranged on the cutter bar in a sleeving mode, and the first end extends out of the cavity. One end of the first connecting assembly is connected with the end, close to the second end, of the sleeve assembly. One end of the second connecting assembly is detachably connected with the other end of the first connecting assembly, and the second connecting assembly is connected with the second end of the cutter bar. The handle assembly is connected with the other end of the second connecting assembly. After the sleeve assembly and the cutter bar are detached, the cutter bar can be cleaned, the cleaned cutter bar can be put into use again, the cutter bar does not need to be discarded, and resource waste is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of medical instruments, and in particular to a surgical instrument. Background Art

[0002] Surgical instruments have been widely used in surgical operations. In related technologies, surgical instruments include a knife bar, a sleeve and a handle. The sleeve and the knife bar are connected to the handle, and the sleeve is sleeved on the knife bar. The knife bar and the sleeve cooperate to perform the operation. Dirt during the operation will enter the space between the knife bar and the sleeve, and the space between the knife bar and the sleeve is relatively narrow and difficult to clean.

[0003] In the related art, surgical instruments are discarded after the operation is completed, resulting in a waste of resources. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems in the background technology. To this end, one purpose of the present application is to provide a surgical instrument to reduce resource waste.

[0005] 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.

[0006] 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.

[0007] 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.

[0008] In some embodiments, the inner wall of the second connecting sleeve has a second positioning protrusion, which forms a step on the inner wall of the second connecting sleeve. The outer wall of the second connecting sleeve has a third positioning protrusion, which is clamped on the step.

[0009] 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.

[0010] 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.

[0011] In some embodiments, the inner 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 assembly, 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 wall of the first mounting groove and the positioning plate.

[0012] 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, the first mounting hole is connected to the second mounting groove, and 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.

[0013] 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 fit together.

[0014] In some embodiments, the fourth connecting sleeve is sleeved on the second connecting sleeve; the outer wall of the second connecting sleeve is connected to a second mounting protrusion, and the second mounting protrusion is elastic so that the second mounting protrusion can move toward the cavity; a second mounting hole is provided 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.

[0015] In some embodiments, the fourth connecting sleeve is sleeved on the second connecting sleeve; the outer wall of the second connecting sleeve is connected to the first rotation slot, the inner wall of the fourth connecting sleeve is connected to the second rotation slot, and the first rotation slot is located inside the second rotation slot.

[0016] 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.

[0017] The surgical instrument provided in the embodiment of the present application, when installed, connects the second connecting component to the first connecting component to achieve the connection between the sleeve assembly and the knife rod, so that the surgical instrument can perform surgery. After the surgery is completed, the second connecting component and the first connecting component are disassembled, so that the sleeve assembly and the knife rod are disassembled. Since dirt will enter the space between the knife rod and the sleeve assembly during the surgery, after the sleeve assembly and the knife rod are disassembled, the knife rod can be cleaned, and the cleaned knife rod can be put into use again, without discarding the knife rod, thereby reducing resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 A schematic structural diagram of a surgical instrument provided in an embodiment of the present application is shown;

[0020] Figure 2 An exploded schematic diagram of a surgical instrument provided in an embodiment of the present application is shown;

[0021] Figure 3 Another exploded schematic diagram of a surgical instrument provided by an embodiment of the present application is shown;

[0022] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0023] Figure 5 A partial connection schematic diagram of a first connecting sleeve provided in an embodiment of the present application is shown;

[0024] Figure 6 A partial cross-sectional schematic diagram of a surgical instrument provided by an embodiment of the present application is shown;

[0025] Figure 7 A cross-sectional schematic diagram of a second connecting sleeve provided in an embodiment of the present application is shown;

[0026] Figure 8 A left view of a positioning plate provided in an embodiment of the present application is shown;

[0027] Fig. 9 A left side view of a fourth connecting sleeve provided in an embodiment of the present application is shown;

[0028] Fig.10 A cross-sectional schematic diagram showing the cooperation between a fourth connecting sleeve and a second connecting sleeve provided in an embodiment of the present application is shown;

[0029] Fig.11 A schematic diagram of the structure of another surgical instrument provided in an embodiment of the present application is shown;

[0030] Fig.12 A schematic structural diagram of a second connecting sleeve of another surgical instrument provided in an embodiment of the present application is shown;

[0031] Fig.13 A schematic structural diagram of a second connecting assembly of another surgical instrument provided in an embodiment of the present application is shown;

[0032] Fig.14 A schematic diagram of the structure of another surgical instrument provided in an embodiment of the present application is shown;

[0033] Fig.15 A partial structural schematic diagram of a second connecting assembly of another surgical instrument provided in an embodiment of the present application is shown;

[0034] Fig.16 A schematic diagram of the structure of another surgical instrument provided in an embodiment of the present application is shown;

[0035] Fig.17 A diagram showing 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 is shown.

[0036] Description of reference numerals:

[0037] 10. knife bar; 11. first end; 12. second end;

[0038] 20. Sleeve assembly; 21. Inner tube; 22. Outer tube; 23. Clamping nozzle;

[0039] 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 rotating slot; 331. Positioning pin; 332. Notch; 3211. Second positioning groove;

[0040] 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;

[0041] 50. Handle assembly; 51. Shell; 52. Grip ring; 53. Switch; 60. Connecting sleeve. DETAILED DESCRIPTION

[0042] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0043] An embodiment of the present application provides a surgical instrument, Figure 1 A schematic structural diagram of a surgical instrument provided in an embodiment of the present application is shown. Figure 2 An exploded schematic diagram of a surgical instrument provided in an embodiment of the present application is shown. Figure 3 Another exploded schematic diagram of a surgical instrument provided by an embodiment of the present application is shown. In order to clearly show the internal structure of the surgical instrument, Figure 2 and Figure 3 An exploded view of the diagram shows a partial cutaway view. Figures 1 to 3The surgical instrument includes a knife rod 10, a sleeve assembly 20, a first connecting assembly 30, a second connecting assembly 40 and a handle assembly 50. The knife rod 10 has a first end 11 and a second end 12 arranged along a first direction X. The sleeve assembly 20 has a cavity extending along the first direction X, and the sleeve assembly 20 is sleeved on the knife rod 10, and the first end 11 extends out of the cavity. One end of the first connecting assembly 30 is connected to one end of the sleeve assembly 20 close to 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, and the second connecting assembly 40 is 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.

[0044] 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.

[0045] Exemplarily, the shank 10 may be made of a material having high thermal strength and good corrosion resistance, such as titanium alloy.

[0046] 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.

[0047] See also Figure 1 The handle assembly 50 includes a housing 51, a grip ring 52 and a switch 53. The housing 51 is the entire main body of the handle assembly 50. Control elements and the like can be arranged in the housing 51. The grip ring 52 can be linked with the knife bar 10 or the sleeve assembly 20 to control the movement of the knife bar 10 or the sleeve assembly 20. The switch 53 can control the opening and closing of the surgical instrument.

[0048] Exemplarily, the handle assembly 50 may be made of a material having a physical property of high strength resistant to high temperature sterilization and a chemical property of not releasing undesirable components at high temperatures, such as a polymer material.

[0049] Exemplarily, the shell 51 may be made of a plastic-coated metal plate to increase the strength of the plastic part during high-temperature sterilization.

[0050] In an embodiment of the present application, one end of the first connecting component 30 is connected to an 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 achieved 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.

[0051] 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 assembly 20 and the knife rod 10 is realized through the first connecting component 30 and the second connecting component 40, so that the sleeve assembly 20 and the knife rod 10 are relatively stable during the operation.

[0052] Exemplarily, the first connection component 30 or the second connection component 40 may be supported by a material having a physical property of high strength and resistance to high temperature sterilization and a chemical property of not releasing undesirable components at high temperatures, such as a polymer material.

[0053] In the embodiment of the present application, during installation, the second connection assembly 40 is connected to the first connection assembly 30 to achieve the connection between the sleeve assembly 20 and the knife rod 10, so that the surgical instrument can perform surgery. After the surgery is completed, the second connection assembly 40 and the first connection assembly 30 are disassembled so that the sleeve assembly 20 and the knife rod 10 are disassembled. Since dirt will enter the space between the knife rod 10 and the sleeve assembly 20 during the surgery, after the sleeve assembly 20 and the knife rod 10 are disassembled, the knife rod 10 can be cleaned, and the cleaned knife rod 10 can be put into use again, without discarding the knife rod 10, thereby reducing resource waste.

[0054] Meanwhile, in the related art, surgical instruments are not detachable, and surgical 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 economic burden of surgical patients.

[0055] Figure 4 for Figure 3 Enlarged view of point A in the middle. Figures 2 to 4 The first connection assembly 30 includes a first connection sleeve 31 and a second connection sleeve 32. The first connection sleeve 31 is connected to an end of the sleeve assembly 20 close to the second end 12, and the second connection sleeve 32 is sleeved on the first connection sleeve 31. Figure 2 and Figure 3 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, the third connecting sleeve 41 is connected to the second end 12 of the knife rod 10, the third connecting sleeve 41 is detachably connected to the first connecting sleeve 31, 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.

[0056] 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 .

[0057] 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, which 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 sleeve assembly 20 and the knife rod 10 during the operation, and 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 sleeve assembly 20 and the knife rod 10 can be disassembled and the knife rod 10 can be cleaned. Reduce resource waste.

[0058] See also Figures 2 to 4 The first connecting sleeve 31 includes a first connecting shaft sleeve 311 and a second connecting shaft sleeve 312 . Figure 5 FIG. 1 shows a partial connection diagram of a first connecting sleeve provided in an embodiment of the present application. 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. The outer wall of the first connecting sleeve 311 is connected with a first positioning protrusion 3111. The first positioning protrusion 3111 is elastic so that the first positioning protrusion 3111 can move toward the cavity. In the direction from the first end 11 to the second end 12, the height of the first positioning protrusion 3111 gradually decreases. 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. The second connecting sleeve 32 is connected to the second connecting sleeve 312, and the side wall of the second connecting sleeve 312 has a first positioning hole 3121. Among them, the third connecting sleeve 41 is sleeved on the second connecting sleeve 312, and 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.

[0059] In one embodiment of the present application, a 3 / 4-circle annular square hole can be provided on the outer side wall of the first connecting sleeve 311, so that the side wall of the first connecting sleeve 311 forms a square spring piece 3112, and 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. Exemplarily, 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.

[0060] 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.

[0061] In the 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. Figure 5 In the illustrated view, 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.

[0062] 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 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.

[0063] In the 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.

[0064] 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.

[0065] Figure 6 FIG. 1 is a partial cross-sectional schematic diagram of a surgical instrument provided by an embodiment of the present application. Figure 4 and Figure 6 The inner 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 wall of the second connecting sleeve 32. The outer wall of the second connecting sleeve 312 has a third positioning protrusion 3122, and the third positioning protrusion 3122 is clamped at the step.

[0066] Figure 7 FIG. 2 shows a cross-sectional schematic diagram of a second connecting sleeve provided in an embodiment of the present application. Figure 7 , the second connecting sleeve 32 may include two second positioning protrusions 321, and the two second positioning protrusions 321 are arranged opposite to each other along the radial direction of the second connecting sleeve 32. Figure 4 and Figure 6 The outer wall of the second connecting sleeve 312 has two third positioning protrusions 3122, and the two third positioning protrusions 3122 are arranged opposite to each other along the radial direction of the second connecting sleeve 312, so that the two third positioning protrusions 3122 are respectively clamped at the steps formed by the two second positioning protrusions 321.

[0067] In the embodiment of the present application, when installing the second connecting sleeve 32 and the second connecting sleeve 312, the second connecting sleeve 32 or the second connecting sleeve 312 can be rotated first, so that the second positioning protrusion 321 and the third positioning protrusion 3122 are staggered, and then the third positioning protrusion 3122 is extended into the inner cavity of the second connecting sleeve 32, and then the second connecting sleeve 32 or the second connecting sleeve 312 is rotated so that the third positioning protrusion 3122 is clamped at the step where the second positioning protrusion 321 forms a step, and the installation of the second connecting sleeve 32 and the second connecting sleeve 312 is completed. When disassembling the second connecting sleeve 32 and the second connecting sleeve 312, the second connecting sleeve 32 or the second connecting sleeve 312 is rotated again, so that the second positioning protrusion 321 and the third positioning protrusion 3122 are staggered, and then the third positioning protrusion 3122 is pulled out from the inner cavity of the second connecting sleeve 32, and the disassembly of the second connecting sleeve 32 and the second connecting sleeve 312 is completed.

[0068] In an embodiment of the present application, the connection between the second connecting sleeve 32 and the second connecting 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 sleeve 312 can be driven to move, and at the same time, the second connecting sleeve 32 and the second connecting sleeve 312 can be disassembled to achieve the disassembly of the second connecting sleeve 32 and the first connecting sleeve 31.

[0069] See also Figures 4 to 6The outer side wall of the second connecting sleeve 312 may further include a fourth positioning protrusion 3123, the fourth positioning protrusion 3123 and 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, and 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 second connecting sleeve 312 from continuing to move, and preventing the second connecting sleeve 312 from moving to the inside of the second connecting sleeve 32 and colliding with other components.

[0070] See also Figures 2 to 6 The first connecting assembly 30 also includes a positioning plate 33, which is connected to one end of the sleeve assembly 20 close to the second end 12, and the first connecting sleeve 311 and the second connecting sleeve 312 are located on one side of the positioning plate 33 close to the handle assembly 50. Figure 8 FIG. 2 shows a left side view of a positioning plate provided in an embodiment of the present application. Figure 8 The positioning plate 33 has a positioning pin 331 on one 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. Fig. 9 FIG. 2 shows a left side view of a fourth connecting sleeve provided in an embodiment of the present application. Figure 2 , Figure 8 and Fig. 9 The positioning pin 331 is inserted into the first positioning groove 426 of the fourth connecting sleeve 42 .

[0071] See also 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.

[0072] In the 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 close to the second end 12, and then the first connecting sleeve 311 and the second connecting sleeve 312 are connected to the end of the sleeve assembly 20 close to the second end 12 from the side of the positioning plate 33 close to the handle assembly 50. Then the second connecting sleeve 32 or the positioning plate 33 can be rotated first so that the notch 332 is opposite to the second positioning protrusion 321, and then part 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 at 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 by the above-mentioned installation method of the second connecting sleeve 32 and the second connecting sleeve 312.

[0073] In the embodiment of the present application, when disassembling the second connecting sleeve 32 and the positioning plate 33, the above-mentioned disassembly method of 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 opposite to the second positioning protrusion 321, and then the positioning plate 33 is pulled out from the inner cavity of the second connecting sleeve 32, and the disassembly of the second connecting sleeve 32 and the positioning plate 33 is completed.

[0074] 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 sleeved 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.

[0075] 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, so as to avoid reverse insertion during insertion and achieve fool-proofing.

[0076] See also Figures 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 one 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 one end of the outer tube 22 close to the second end 12.

[0077] 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 be connected by welding, bonding or interference fit.

[0078] In an embodiment of the present application, the sleeve assembly 20 is configured to be in the form of an inner tube 21 and an outer tube 22, and at the same time, 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 will not interfere with each other when they are respectively connected to the sleeve assembly 20.

[0079] See also Figure 2 and Figure 3 The sleeve assembly 20 further includes a clamping nozzle 23, which is connected to the outer tube 22 and is rotatable, and the rotation axis of the clamping nozzle 23 is perpendicular to the first direction X. In the embodiment of the present application, the grip ring 52 controls the inner tube 21 to move along the first direction X, so that the clamping nozzle 23 rotates, and when the clamping nozzle 23 rotates, it cooperates with the first end 11 of the knife rod 10, so that the clamping action can be realized during the operation.

[0080] In the embodiment of the present invention, a clamping pad may be arranged on the clamping nozzle 23 to increase the cushioning effect.

[0081] Exemplarily, the inner tube 21 and the outer tube 22 may be made of an oxidation-resistant, high-strength, and corrosion-resistant material, such as stainless steel.

[0082] Combination Figures 2 to 4 and Figure 6 The inner side wall of the second connecting sleeve 32 has a first mounting groove 322. The first connecting assembly 30 also includes an elastic element 34. The elastic element 34 is sleeved on the sleeve assembly 20. 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.

[0083] In the embodiment of the present application, the elastic element 34 is sleeved on the outer tube 22 .

[0084] Exemplarily, the elastic element 34 may include a spring.

[0085] 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.

[0086] See also Figure 4 , Figure 6 The second connecting sleeve 32 has a first mounting protrusion 323 at one end facing the handle assembly 50 . The first mounting protrusion 323 is elastic so that the first mounting protrusion 323 can move toward the cavity. Fig.10 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 is shown. Figure 2 , Figure 3 and Fig.10 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. Fig.10 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 . The outer side wall of the fourth connecting sleeve 42 is also connected to a pressing protrusion 423 . The pressing protrusion 423 extends into the first mounting hole 422 and contacts the first mounting protrusion 323 .

[0087] In the embodiment of the present invention, 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.

[0088] In some embodiments of the present application, the pressing protrusion 423 may be made of a silicone material to improve the hand feel when pressing the pressing protrusion 423 .

[0089] 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, which is not limited to the embodiments of the present application.

[0090] In the embodiment of the present application, when installing the second connection sleeve 32 and the fourth connection sleeve 42, the first installation protrusion 323 of the second connection sleeve 32 is inserted into the inner cavity of the fourth connection sleeve 42 from the end of the fourth connection sleeve 42 away from the handle assembly 50, and the first installation protrusion 323 is inserted into the second installation groove 421, so as to realize the connection between the second connection sleeve 32 and the fourth connection sleeve 42. When disassembling the second connection sleeve 32 and the fourth connection sleeve 42, the pressing protrusion 423 is pressed, so that the pressing protrusion 423 pushes the first installation protrusion 323 to move toward the cavity, and then moves along the first direction X toward the first end 11 past the second connection sleeve 32, so as to realize the disassembly of the second connection sleeve 32 and the fourth connection sleeve 42. It makes it easy to install and disassemble the second connection sleeve 32 and the fourth connection sleeve 42, saving the time of disassembly and installation.

[0091] See also Figure 6 and Fig.10 , in the direction from the first end 11 to the second end 12, the height of the first mounting protrusion 323 gradually decreases.

[0092] In the embodiment of the present application, the height of the first mounting protrusion 323 close to 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 close to 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, and there is no need to press the first mounting protrusion 323 additionally, which is more convenient.

[0093] 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 be in other forms, which is not limited in the embodiments of the present application.

[0094] See also Figure 7 The outer side wall of the second connecting sleeve 32 has a first anti-rotation plane 324, see Fig. 9 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 contact with each other.

[0095] 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.

[0096] In other implementations, the first anti-rotation plane 324 may not be provided on the outer wall of the second connecting sleeve 32, and correspondingly, the second anti-rotation plane 424 may not be provided on the inner wall of the fourth connecting sleeve 42, which is not limited in the embodiments of the present application.

[0097] See also Fig.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 .

[0098] Fig.11 A schematic structural diagram of another surgical instrument provided in an embodiment of the present application is shown. Fig.12 A schematic structural diagram of a second connecting sleeve of another surgical instrument provided in an embodiment of the present application is shown. Fig.13 FIG. 2 is a schematic diagram showing the structure of another second connection assembly of a surgical instrument provided in an embodiment of the present application. Figures 11 to 13 The fourth connecting sleeve 42 is sleeved on the second connecting sleeve 32. The outer wall of the second connecting sleeve 32 is connected with 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 has 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.

[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 extended into the inner cavity of the fourth connecting sleeve 42, so that the second mounting protrusion 325 is inserted into the second mounting hole 425, thereby realizing the installation of the fourth connecting sleeve 42 and the second connecting sleeve 32. When disassembling 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 is moved along the first direction X, thereby realizing the disassembly 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 save time for disassembly and installation.

[0100] Fig.14 A schematic structural diagram of another surgical instrument provided in an embodiment of the present application is shown. Fig.15 FIG. 2 is a partial structural diagram of another second connecting assembly of a surgical instrument provided in an embodiment of the present application. Fig.14 and Fig.15 The fourth connecting sleeve 42 is sleeved on the second connecting sleeve 32. The outer wall of the second connecting sleeve 32 is connected with the first rotating slot 326, and the inner wall of the fourth connecting sleeve 42 is connected with the second rotating slot. The first rotating slot 326 is located in the second rotating slot.

[0101] In the embodiment of the present application, the second rotation slot is located inside the fourth connecting sleeve 42 (not shown).

[0102] 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, and then the fourth connecting sleeve 42 or the second connecting sleeve 32 is rotated so that the first rotating slot 326 is clamped in the second rotating slot, thereby realizing the installation of the fourth connecting sleeve 42 and the second connecting sleeve 32. When disassembling 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 clamped in the second rotating slot and misaligned, and then the second connecting sleeve 32 is moved along the first direction X, thereby realizing the disassembly 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 save time for disassembly and installation.

[0103] Fig.16 A schematic structural diagram of another surgical instrument provided in an embodiment of the present application is shown. Fig.17 FIG. 2 shows a connection process diagram of a second connection sleeve and a fourth connection sleeve of another surgical instrument provided in an embodiment of the present application. Fig.16 and Fig.17 The second connecting sleeve 32 is sleeved on the fourth connecting sleeve 42 , and the second connecting sleeve 32 is threadedly connected to the fourth connecting sleeve 42 .

[0104] In the embodiment of the present application, when installing the fourth connecting sleeve 42 and the second connecting sleeve 32, first connect the first connecting sleeve 31 and the positioning plate 33 to the sleeve assembly 20, then extend the whole formed by the first connecting sleeve 31, the positioning plate 33 and the sleeve assembly 20 into the inner cavity of the fourth connecting sleeve 42, and finally thread the second connecting sleeve 32 to the fourth connecting sleeve 42. When disassembling the fourth connecting sleeve 42 and the second connecting sleeve 32, directly rotate the fourth connecting sleeve 42 or the second connecting sleeve 32 to unscrew the threads to realize the disassembly 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 save time for disassembly and installation.

[0105] exist Figures 2 to 3 In the second connecting sleeve 312 shown, the first positioning hole 3121 extends to the end of the second connecting sleeve 312 away from the handle assembly 50. Fig.17 In the second connecting sleeve 312 shown, 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 may include any of the above two structural forms of the second connecting sleeve 312, and the embodiment of the present application is not limited thereto.

[0106] 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.

[0107] 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 that are 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present application.

[0108] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third" may explicitly or implicitly include one or more of the feature. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0109] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0110] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0111] 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, which should all be included in 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 attached claims.

Claims

1. A surgical instrument, characterized in that: The surgical instrument comprises: A knife rod (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 component (30), one end of the first connecting component (30) being connected to an end of the sleeve component (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); A handle assembly (50) is connected to the other end of the second connecting assembly (40).

2. The surgical instrument according to claim 1, characterized in that 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), 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, characterized in that The first connecting sleeve (31) comprises: a first connecting sleeve (311) connected to one end of the sleeve assembly (20) close to the second end (12); an 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 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); Wherein, the third connecting sleeve (41) is sleeved on the second connecting 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, characterized in that The inner side wall of the second connecting sleeve (32) has a second positioning protrusion (321), and the second positioning protrusion (321) enables the inner side wall of the second connecting sleeve (32) to form a step. 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, characterized in that The first connection 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, characterized in that The sleeve assembly (20) comprises: An inner tube (21), the cavity is located in the inner tube (21), and the first connecting sleeve (311) is 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 6, characterized in that The inner side wall of the second connecting sleeve (32) has a first mounting groove (322), and the first connecting assembly (30) further comprises: 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 are respectively 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, characterized in that 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) penetrating the side wall of the fourth connecting sleeve (42), the first mounting hole (422) being 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), the pressing protrusion (423) extending into the first mounting hole (422) and contacting the first mounting protrusion (323).

9. The surgical instrument according to claim 8, characterized in that 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, characterized in that 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) has 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, characterized in that 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, characterized in that 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).

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