Ultrasonic knife shifting structure and ultrasonic knife

Abstract

The utility model relates to the technical field of medical instruments, and discloses an ultrasonic knife turning structure and an ultrasonic knife, the ultrasonic knife turning structure comprises a turning head and a turning shaft, the inner wall of the turning head is provided with a first limiting part, the turning shaft is arranged in the turning head in a penetrating manner, the outer wall of the turning shaft is clamped with the inner wall of the turning head, and the end part of one side of the turning shaft is provided with a second limiting part. A first limiting part is arranged at one end of the shifting rotating shaft, a second limiting part is arranged at the other end of the shifting rotating shaft, the first limiting part abuts against the second limiting part, a plurality of first grooves are formed in the end, where the second limiting part is located, of the shifting rotating shaft in the circumferential direction, and the end, away from the second limiting part, of the shifting rotating shaft abuts against the shifting rotating head in a limiting mode. When the shifting rotating shaft completely penetrates into the shifting rotating head, the end where the second limiting part is located recovers to the original position, the second limiting part abuts against the first limiting part, the end, away from the second limiting part, of the shifting rotating shaft abuts against the shifting rotating head in a limiting mode, and axial displacement of the shifting rotating shaft in the shifting rotating head is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an ultrasonic knife rotation structure and an ultrasonic knife. Background Art

[0002] Ultrasonic scalpel is a common medical device, mainly used in surgical laparoscopic surgery, which can accurately cut and coagulate tissues while minimizing trauma and bleeding. Ultrasonic scalpel is mainly composed of ultrasonic generator, handle and blade. Ultrasonic scalpel generates mechanical energy through high-frequency sound wave vibration, causing tissue coagulation and denaturation, thereby achieving the purpose of cutting and hemostasis.

[0003] The blade on the ultrasonic scalpel is movably mounted on the blade rod. In order to cut at different circumferential angles during surgery, the blade rod part needs to be rotated so that the blade faces different angles. Therefore, a dial structure is required to control the rotation of the blade rod.

[0004] In the prior art, the dial structure usually sets a locking boss with a certain elastic deformation on the dial shaft on the side wall of the cylindrical table. Since the radial deformation of the locking boss is very small and the axial positioning end surface positioning surface of the dial shaft is very small, it is very inconvenient to install the dial shaft sleeve into the dial head. At the same time, due to the small positioning surface, the limiting support strength is poor, and the positioning is unstable after installation. Utility Model Content

[0005] In view of this, the utility model provides an ultrasonic knife rotating structure and an ultrasonic knife to solve the problems in the prior art that the rotating shaft and the rotating head are inconvenient to install and unstable after installation.

[0006] In the first aspect, the utility model provides an ultrasonic knife dial structure, including a dial head and a dial shaft, the interior of the dial head is a cavity, the inner wall of the dial head is provided with a first limiting portion, the dial shaft is tubular, and its interior is used for detachable connection with the knife rod assembly, the dial shaft is passed through the interior of the dial head, the outer wall of the dial shaft and the inner wall of the dial head are mutually clamped, a second limiting portion is provided at one end of the dial shaft, the first limiting portion is abutted against the second limiting portion, and a plurality of first grooves are provided along the circumferential direction at the end where the second limiting portion is located, and the end of the dial shaft away from the second limiting portion is abutted against the dial head limit.

[0007] Beneficial effect: The utility model provides a plurality of first grooves along the circumferential direction at the end of the dial shaft. When the dial shaft is inserted into the dial head, since the end face size of the second limiting portion is larger than the inner diameter of the dial head, the end of the dial shaft where the second limiting portion is located is squeezed inward by the inner wall of the dial head. When the dial shaft is completely inserted into the dial head, the end where the second limiting portion is located returns to its original position, the second limiting portion abuts against the first limiting portion, and the end of the dial shaft away from the second limiting portion abuts against the dial head limit, thereby avoiding axial displacement of the dial shaft in the dial head. The utility model has the advantages of easy installation, good limiting effect and stable positioning after installation.

[0008] In an optional embodiment, a plurality of first ribs are provided on the inner wall of the rotary head along the circumferential direction, and a plurality of second ribs are provided on the outer wall of the rotary shaft along the circumferential direction, and the second ribs are engaged with the first ribs.

[0009] Beneficial effect: The utility model can make the installation of the dial head and the dial shaft more stable by interlocking the first convex rib in the dial head and the second convex rib on the dial shaft. When it is necessary to adjust the angle of the knife rod assembly in the dial shaft, it is only necessary to rotate the dial head to drive the dial shaft and the knife rod assembly to rotate together.

[0010] In an optional embodiment, the first limiting portion is located at the end of the first rib.

[0011] Beneficial effect: The utility model sets the first limiting part at the end of the first convex rib, so that the first convex rib and the first limiting part can be integrated into a whole, making the layout inside the dial head more concise, and at the same time, the first limiting part of the overall structure has high supporting strength.

[0012] In an optional embodiment, a third limiting portion is provided on the outer wall of the dial shaft, the second rib is located between the second limiting portion and the third limiting portion, a fourth limiting portion is provided on the inner wall of the dial head, the first rib is located between the first limiting portion and the fourth limiting portion, and the third limiting portion abuts against the fourth limiting portion.

[0013] Beneficial effect: The utility model provides a third limiting portion and a fourth limiting portion. When the dial shaft is installed in the dial head, the abutting third limiting portion and the fourth limiting portion can produce axial limitation on the dial shaft, avoiding the axial movement of the dial shaft during use, thereby improving the stability of the ultrasonic knife dial structure.

[0014] In an optional embodiment, a side of a limiting portion away from the second rib is an inclined surface.

[0015] Beneficial effect: In the utility model, one side of the first limiting portion is configured as an inclined surface, so that the rotating shaft is easily inserted into the rotating head during installation.

[0016] In an optional embodiment, a second groove is provided on the rotating shaft, the second rib is located in the second groove, and one end of the second rib is fixedly connected to the rotating shaft.

[0017] Beneficial effect: The utility model arranges the second rib in the second groove. When the dial shaft rotates to the extreme position, if the dial head continues to be rotated, the first rib can push the second rib to deform in the second groove, thereby playing a buffering role and avoiding damage to the first and second ribs due to excessive rotation of the dial head.

[0018] In an optional embodiment, a groove is provided on the outer wall of the rotary head.

[0019] Beneficial effects: The utility model provides a groove on the outer wall of the dial head, which is convenient for the user to hold and operate during use, thereby increasing the comfort during use.

[0020] In an optional embodiment, a first pin hole is provided on a side wall of one end of the rotating shaft away from the second limiting portion.

[0021] In the second aspect, the utility model also provides an ultrasonic knife, including the above-mentioned ultrasonic knife rotating structure, shell, knife rod assembly, and trigger assembly, the shell is fixedly connected to the rotating shaft, the knife rod assembly is fixedly connected to the rotating shaft, the trigger assembly is movably connected to the shell, and the trigger assembly is movably connected to the knife rod assembly.

[0022] In an optional embodiment, the knife rod assembly includes a knife rod and a knife head. The knife rod is inserted into the rotating shaft and fixedly connected to the rotating shaft. One end of the knife rod is movably connected to the trigger assembly, and the knife head is movably connected to the knife rod.

[0023] Since the ultrasonic scalpel adopts the ultrasonic scalpel rotating structure in the utility model, it has the same beneficial effects as the rotating structure, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a front view of an ultrasonic knife rotating structure in the related art;

[0026] Figure 2 It is a cross-sectional front view of an ultrasonic scalpel according to an embodiment of the utility model;

[0027] Figure 3 for Figure 2 Middle A is a partial enlarged schematic diagram of the ultrasonic knife rotation structure;

[0028] Figure 4 A radial cross-sectional view of an ultrasonic scalpel according to an embodiment of the utility model;

[0029] Figure 5 This is a schematic diagram of the structure of a rotary head in an ultrasonic scalpel according to an embodiment of the utility model;

[0030] Figure 6 It is a schematic structural diagram of another viewing angle of a rotary head in an ultrasonic scalpel according to an embodiment of the utility model;

[0031] Figure 7 It is a schematic diagram of the cross-sectional view structure of a rotary head in an ultrasonic scalpel according to an embodiment of the utility model;

[0032] Figure 8 This is a schematic structural diagram of a rotary shaft in an ultrasonic scalpel according to an embodiment of the utility model;

[0033] Fig. 9 This is a front view of a rotary shaft in an ultrasonic scalpel according to an embodiment of the utility model;

[0034] Fig.10 It is a cross-sectional front view of a rotary shaft in an ultrasonic knife according to an embodiment of the utility model;

[0035] Fig.11 This is a front view of an ultrasonic knife according to an embodiment of the utility model;

[0036] Fig.12 The figure is a schematic diagram of the three-dimensional structure of an ultrasonic knife according to an embodiment of the utility model.

[0037] Description of reference numerals:

[0038] 1. Turning head; 101. First limiting portion; 102. First convex rib; 103. Fourth limiting portion; 104. Groove;

[0039] 2. rotating shaft; 201. second limiting portion; 202. first groove; 203. second convex rib; 204. third limiting portion; 205. second groove; 206. first pin hole;

[0040] 3. Shell;

[0041] 4. Cutter bar assembly; 401. Cutter bar; 402. Cutter head;

[0042] 5. Trigger assembly;

[0043] 6. Connecting pin.

[0044] Description of related technical reference numerals:

[0045] 1a. Rotate the shaft;

[0046] 2a, positioning boss;

[0047] 3a. Turn the head;

[0048] 4a. Limiting part. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0050] In related technologies, such as Figure 1 As shown, the dial structure of the ultrasonic knife is usually to set a locking boss 2a with a certain elastic deformation on the dial shaft 1a on the side wall of the dial shaft 1a. When the dial shaft 1a is installed in the dial head 3a, the locking boss 2a shrinks radially. After being installed to a suitable position, the locking boss 2a returns to its original position and is engaged with the limiting portion 4a on the inner wall of the dial head 3a. Since the radial deformation of the locking boss 2a is very small and the axial positioning end face positioning surface of the dial shaft 1a is very small, it is very inconvenient to put the dial shaft 1a into the dial head 3a. At the same time, due to the small positioning surface and poor limiting support strength, the positioning is unstable after installation.

[0051] Combine the following Figures 2 to 12 , describing an embodiment of the utility model.

[0052] According to an embodiment of the present utility model, on the one hand, as Figures 2 to 10 As shown, an ultrasonic knife dial structure is provided, including a dial head 1 and a dial shaft 2, the interior of the dial head 1 is a cavity, the inner wall of the dial head 1 is provided with a first limiting portion 101, the dial shaft 2 is tubular, and its interior is used for detachable connection with the knife rod assembly 4, the dial shaft 2 is passed through the interior of the dial head 1, the outer wall of the dial shaft 2 and the inner wall of the dial head 1 are mutually clamped, and a second limiting portion 201 is provided at one end of the dial shaft 2, the first limiting portion 101 is abutted against the second limiting portion 201, and a plurality of first grooves 202 are provided along the circumferential direction at the end where the second limiting portion 201 is located, and the end of the dial shaft 2 away from the second limiting portion 201 is limitedly abutted against the dial head 1.

[0053] Specifically, in this embodiment, the dial head 1 and the dial shaft 2 are both cylindrical tubes, the length of the dial shaft 2 is greater than the length of the dial head 1, the outer diameter of the dial shaft 2 matches the inner diameter of the dial head 1, the dial shaft 2 is passed through the dial head 1, and the cavity inside the dial shaft 2 is used to install the tool rod assembly 4. The outer wall of the dial shaft 2 and the inner wall of the dial head 1 are connected with each other to achieve synchronous rotation, thereby driving the tool rod assembly 4 to rotate to the desired angle with the dial shaft 2.

[0054] In this embodiment, a first limit portion 101 is circumferentially provided on the inner wall of the dial head 1, and a second limit portion 201 is provided at one end of the dial shaft 2. The inner diameter of the first limit portion 101 is smaller than the outer diameter of the second limit portion 201. When the dial shaft 2 is installed in the dial head 1, the side of the first limit portion 101 can abut against the side of the second limit portion 201, and the end of the dial shaft 2 away from the second limit portion 201 is limitedly abutted against the dial head 1, thereby limiting the axial displacement of the dial shaft 2.

[0055] In this embodiment, the first groove 202 is in the shape of an elongated strip, and its length direction is parallel to the axial direction of the rotating shaft 2 . A plurality of first grooves 202 are equidistantly arranged along the circumferential direction at the end of the second limiting portion 201 on the rotating shaft 2 .

[0056] Specifically, in this embodiment, the number of the first grooves 202 is three, and the three first grooves 202 are distributed at equal intervals.

[0057] The utility model provides a plurality of first grooves 202 along the circumferential direction at the end of the dial shaft 2. When the dial shaft 2 is inserted into the dial head 1, since the end surface size of the second limiting portion 201 is larger than the inner diameter of the dial head 1, the end of the dial shaft 2 where the second limiting portion 201 is located is squeezed inward by the inner wall of the dial head 1. When the dial shaft 2 is completely inserted into the dial head 1, the end where the second limiting portion 201 is located returns to its original position, and the second limiting portion 201 abuts against the first limiting portion 101, thereby preventing the dial shaft 2 from generating axial displacement in the dial head 1. The utility model has the advantages of easy installation, good limiting effect, and stable positioning after installation.

[0058] In one embodiment, Figures 3 to 10 As shown, a plurality of first convex ribs 102 are provided on the inner wall of the rotary head 1 along the circumferential direction, and a plurality of second convex ribs 203 are provided on the outer wall of the rotary shaft 2 along the circumferential direction. The second convex ribs 203 are engaged with the first convex ribs 102 .

[0059] Specifically, in this embodiment, the first rib 102 protrudes from the inner wall of the dial head 1 to a certain height, and its length direction is parallel to the axial direction of the dial head 1, and multiple first ribs 102 are arranged on the inner wall of the dial head 1 at equal intervals along the circumferential direction; the second rib 203 protrudes from the outer wall of the dial shaft 2 to a certain height, and the length direction of the second rib 203 is parallel to the first rib 102, and multiple second ribs 203 are arranged on the outer wall of the dial shaft 2 at equal intervals along the circumferential direction. When the dial shaft 2 is sleeved in the dial head 1, the first rib 102 is inserted between two adjacent second ribs 203, and similarly the second rib 203 is inserted between two adjacent first ribs 102.

[0060] In this embodiment, the number of second ribs 203 is set to four, and the number of first ribs 102 is greater than the number of second ribs 203. In this way, the number of plug-in spaces formed between the first ribs 102 is greater than the number of second ribs 203. During installation, the second ribs 203 can be inserted into any plug-in space for easy installation.

[0061] The utility model can make the installation of the dial head 1 and the dial shaft 2 more stable by mutually clamping the first convex rib 102 in the dial head 1 and the second convex rib 203 on the dial shaft 2. When it is necessary to adjust the angle of the knife rod assembly 4 in the dial shaft 2, it is only necessary to rotate the dial head 1 to drive the dial shaft 2 and the knife rod assembly 4 to rotate together.

[0062] In one embodiment, Figure 3 , Figure 5 and Figure 7 As shown, the first limiting portion 101 is located at the end of the first rib 102 .

[0063] Specifically, in this embodiment, the first limiting portion 101 is located at the end of the first rib 102 close to the cutter head 402 .

[0064] The utility model sets the first limiting part 101 at the end of the first convex rib 102, so that the first convex rib 102 and the first limiting part 101 are integrated into one body, making the layout inside the dial head 1 more concise, and the first limiting part 101 of the overall structure has high supporting strength.

[0065] In one embodiment, Figures 3 to 10 As shown, a third limiting portion 204 is provided on the outer wall of the rotating shaft 2, the second convex rib 203 is located between the second limiting portion 201 and the third limiting portion 204, a fourth limiting portion 103 is provided on the inner wall of the rotating head 1, the first convex rib 102 is located between the first limiting portion 101 and the fourth limiting portion 103, and the third limiting portion 204 abuts against the fourth limiting portion 103.

[0066] Specifically, in the present embodiment, when one end of the dial shaft 2 provided with the second limit portion 201 is inserted from the other end of the dial head 1 provided with the fourth limit portion 103, since the inner diameter at the fourth limit portion 103 is smaller than the inner diameter of the dial head 1, the end of the dial shaft 2 provided with the second limit portion 201 is gathered and tightened toward the axial direction. During the insertion process, the first convex rib 102 and the second convex rib 203 are inserted into each other in the spaced gap. When the dial shaft 2 completely passes through the inner wall of the dial head 1 and reaches the first limit portion 101, the gathered and tightened end of the dial shaft 2 returns to its original position. At this time, the first limit portion 101 abuts against the second limit portion 201, and the third limit portion 204 abuts against the fourth limit portion 103, thereby limiting the axial displacement of the first convex rib 102 and the second convex rib 203.

[0067] The utility model provides the third limiting portion 204 and the fourth limiting portion 103. When the dial shaft 2 is installed in the dial head 1, the abutting third limiting portion 204 and the fourth limiting portion 103 can axially limit the dial shaft 2 to avoid the axial movement of the dial shaft 2, thereby improving the stability of the dial structure.

[0068] In one embodiment, Figure 3 , Figures 8 to 10 As shown, the side of the second limiting portion 201 away from the second rib 203 is an inclined surface.

[0069] Specifically, in this embodiment, one side of the second limiting portion 201 is set as an inclined surface. When the dial shaft 2 is inserted into the dial head 1, the inclined surface structure can reduce the resistance of the dial shaft 2 to penetrate into the dial head 1, making it easier for the user to insert the operation.

[0070] In the present invention, one side of the second limiting portion 201 is configured as an inclined surface, so as to facilitate the insertion of the rotating shaft 2 into the rotating head 1 during installation.

[0071] In one embodiment, Figure 3 , Figure 4 , Figures 8 to 10 As shown, a second groove 205 is provided on the rotating shaft 2 , the second convex rib 203 is located in the second groove 205 , and one end of the second convex rib 203 is fixedly connected to the rotating shaft 2 .

[0072] Specifically, in this embodiment, the second rib 203 is cantilevered in the second groove 205, and the second rib 203 has a certain elasticity. When the user rotates the dial head 1, the side wall of the first rib 102 in the dial head 1 applies a driving force to the second rib 203, pushing the second rib 203 to drive the dial shaft 2 to rotate synchronously.

[0073] In this embodiment, the second groove 205 is U-shaped and located at the side of the second rib 203 , and the opening direction of the second groove 205 is located at the same side as the rotation direction of the rotating shaft 2 .

[0074] The utility model arranges the second convex rib 203 in the second groove 205. When the dial shaft 2 rotates to the limit position, if the dial head 1 continues to rotate, the first convex rib 102 can push the second convex rib 203 to deform in the second groove 205, thereby playing a buffering role and avoiding damage to the first convex rib 102 and the second convex rib 203 due to excessive rotation of the dial head 1.

[0075] In one embodiment, Figure 5 and Figure 6 As shown, a groove 104 is provided on the outer wall of the rotary head 1 .

[0076] Specifically, in this embodiment, the multiple grooves 104 on the outer wall of the dial head 1 are arc-shaped, so that the outer wall of the dial head 1 forms multiple concave gripping parts, which increases the resistance between the hand and the outer wall of the dial head 1 during rotation, making it easier for the user to hold and rotate the dial head 1 during use.

[0077] The utility model provides a groove 104 on the outer wall of the rotary head 1, which is convenient for the user to hold and operate during use, thereby increasing the comfort during use.

[0078] In one embodiment, Figure 3 , Figures 8 to 10 As shown, a first pin hole 206 is provided on a side wall of one end of the rotating shaft 2 away from the second limiting portion 201 .

[0079] Specifically, in this embodiment, a side wall of one end of the rotating shaft 2 away from the second limiting portion 201 is provided with a first pin hole 206 perpendicular to the rotating shaft 2 for inserting the connecting pin 6 to connect the knife rod assembly 4 to the rotating shaft 2 .

[0080] According to an embodiment of the present utility model, on the other hand, Figure 2 , Figure 3 , Fig.11 and Fig.12 As shown, an ultrasonic knife is also provided, including the ultrasonic knife rotating structure in the above embodiment, a shell 3, a knife rod assembly 4, and a trigger assembly 5, the shell 3 is fixedly connected to the rotating shaft 2, the knife rod assembly 4 is fixedly connected to the rotating shaft 2, the trigger assembly 5 is movably connected to the shell 3, and the trigger assembly 5 is movably connected to the knife rod assembly 4.

[0081] Specifically, in this embodiment, a mounting hole is provided on the shell 3, and a fifth limiting portion is provided at one end of the dial shaft 2 away from the third limiting portion 204. When the dial shaft 2 is installed in the shell 3, the dial shaft 2 is inserted into the mounting hole, and the fifth limiting portion abuts against the inner wall of the shell 3.

[0082] In this embodiment, the knife bar assembly 4 is inserted into the rotating shaft 2, and a second pin hole is provided on the knife bar assembly 4. The first pin hole 206 and the second pin hole are penetrated by connecting pins 6.

[0083] In this embodiment, the trigger assembly 5 is hinged to the housing 3 , and the driving end on the trigger assembly 5 is movably connected to the knife bar assembly 4 , and the driving end is used to generate high-frequency vibration to the knife bar assembly 4 .

[0084] The utility model provides a dial structure on the ultrasonic knife to facilitate adjustment of the angle of the knife rod assembly 4 during use. When installing the dial assembly, the dial shaft 2 is inserted into the dial head 1. Since the end face size of the second limiting portion 201 is larger than the inner diameter of the dial head 1, the end of the dial shaft 2 where the second limiting portion 201 is located is squeezed inward by the inner wall of the dial head 1. When the dial shaft 2 is completely inserted into the dial head 1, the end where the second limiting portion 201 is located returns to its original position, and the second limiting portion 201 abuts against the first limiting portion 101, thereby avoiding axial displacement of the dial shaft 2 in the dial head 1. The utility model has the advantages of easy installation, good limiting effect, and stable positioning after installation.

[0085] In one embodiment, the knife bar assembly 4 includes a knife bar 401 and a knife head 402. The knife bar 401 is inserted into the rotating shaft 2 and fixedly connected to the rotating assembly. One end of the knife bar 401 is detachably connected to the trigger assembly 5, and the knife head 402 is detachably connected to the knife bar 401.

[0086] Specifically, in this embodiment, the knife rod 401 is inserted into the rotating shaft 2, and a second pin hole is provided at the end of the knife rod 401 away from the installation of the knife head 402. The connection between the knife rod 401 and the rotating shaft 2 can be achieved by inserting the connecting pin 6 in the first pin hole 206 and the second pin hole. The other end of the knife rod 401 is movably mounted with a knife head 402, and the knife head 402 is used for resection or clamping of the diseased part.

[0087] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An ultrasonic knife rotation structure, characterized in that: include: A rotary head (1), wherein the interior of the rotary head (1) is a cavity, and the inner wall of the rotary head (1) is provided with a first limiting portion (101); A dial shaft (2), the dial shaft (2) is tubular, and its interior is used for detachable connection with the knife rod assembly (4), the dial shaft (2) is inserted into the interior of the dial head (1), the outer wall of the dial shaft (2) and the inner wall of the dial head (1) are mutually clamped, and a second limiting portion (201) is provided at one end of the dial shaft (2), the first limiting portion (101) is abutted with the second limiting portion (201), and a plurality of first grooves (202) are provided at the end where the second limiting portion (201) is located along the circumferential direction, and the end of the dial shaft (2) away from the second limiting portion (201) is limitedly abutted with the dial head (1).

2. The ultrasonic knife rotation structure according to claim 1, characterized in that: The inner wall of the rotating head (1) is provided with a plurality of first convex ribs (102) along the circumferential direction, and the outer wall of the rotating shaft (2) is provided with a plurality of second convex ribs (203) along the circumferential direction, and the second convex ribs (203) are engaged and snap-fitted with the first convex ribs (102).

3. The ultrasonic knife rotation structure according to claim 2, characterized in that: The first limiting portion (101) is located at the end of the first convex rib (102).

4. The ultrasonic knife rotation structure according to claim 2 or 3, characterized in that: A third limiting portion (204) is provided on the outer wall of the rotating shaft (2), and the second convex rib (203) is located between the second limiting portion (201) and the third limiting portion (204); The inner wall of the rotating head (1) is provided with a fourth limiting portion (103), the first convex rib (102) is located between the first limiting portion (101) and the fourth limiting portion (103), and the third limiting portion (204) is in abutment with the fourth limiting portion (103).

5. The ultrasonic knife rotation structure according to claim 4, characterized in that: A side of the second limiting portion (201) away from the second convex rib (203) is an inclined surface.

6. The ultrasonic knife rotation structure according to claim 5, characterized in that: The rotating shaft (2) is provided with a second groove (205), the second convex rib (203) is located in the second groove (205), and one end of the second convex rib (203) is fixedly connected to the rotating shaft (2).

7. The ultrasonic knife rotation structure according to claim 5 or 6, characterized in that: A groove (104) is provided on the outer wall of the rotary head (1).

8. The ultrasonic knife rotation structure according to claim 7, characterized in that: A first pin hole (206) is provided on a side wall of one end of the rotating shaft (2) away from the second limiting portion (201).

9. An ultrasonic scalpel, characterized in that: include: The ultrasonic knife rotation structure according to any one of claims 1 to 8; A housing (3), wherein the housing (3) is fixedly connected to the rotating shaft (2); A knife bar assembly (4), wherein the knife bar assembly (4) is fixedly connected to the rotating shaft (2); A trigger assembly (5), wherein the trigger assembly (5) is movably connected to the housing (3), and the trigger assembly (5) is movably connected to the knife rod assembly (4).

10. The ultrasonic scalpel according to claim 9, characterized in that: The knife bar assembly (4) comprises: A knife rod (401), the knife rod (401) is inserted into the rotating shaft (2) and is fixedly connected to the rotating shaft (2), and one end of the knife rod (401) is movably connected to the trigger assembly (5); A cutter head (402), wherein the cutter head (402) is movably connected to the cutter rod (401).

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