Small medical ultrasonic amplitude transformer

Abstract

The utility model provides a small medical ultrasonic amplitude transformer. The small medical ultrasonic amplitude transformer comprises a base cylinder, a nose cylinder and a cutter bar cylinder. The base cylinder is provided with an internal thread and is used for being detachably connected with a transducer or other external components. The nose portion cylinder axially extends from the front end of the base portion cylinder, two symmetrical and parallel flat portions are arranged on the circumferential face of the nose portion cylinder, and the flat portions are used for being matched with the whole transducer to be installed, so that accurate positioning of the direction of the tool bit is guaranteed, and pre-tightening and fixing during assembly are facilitated. The cutter bar cylinder extends from the front end of the nose cylinder, the front portion of the cutter bar cylinder is of an arc-shaped structure, the vibration mode of the cutter head can be adjusted, bending vibration is overlaid on the basis of longitudinal vibration, and a longer effective cutting line is formed. The cutting edge limited by the multiple cutting faces is arranged on the arc-shaped front portion of the cylindrical cutter bar, the edge width and the cutting area of the cutting edge are larger, and better blood coagulation and sealing effects can be achieved. The cutting face where the cutting edge is located is perpendicular to the extending plane of the flat part so that the vibration direction of the arc-shaped front part can be accurately controlled.

Description

Technical Field

[0001] The present application belongs to the technical field of medical devices, and more specifically, relates to a small medical ultrasonic horn. Background Art

[0002] As minimally invasive surgery expands into more complex tissue areas, the long shaft structure of existing ultrasonic scalpels has exposed significant limitations. Due to the excessive length of the instrument shaft, intraoperative adjustment of the operating angle requires displacement of the entire instrument, which not only increases the difficulty of the surgical procedure but also may cause unnecessary tissue stretching. Especially when treating multi-quadrant lesions, surgeons are often forced to frequently change instruments or adopt suboptimal surgical approaches, which not only prolongs the operation time but also increases the risk of patient trauma. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a small medical ultrasonic horn to solve the technical problems in the prior art that the ultrasonic horn is large in size and has limited freedom of use.

[0004] To achieve the above objectives, the technical solution adopted in this application is:

[0005] Provided is a small medical ultrasonic horn, comprising:

[0006] The base is cylindrical and provided with an internal thread;

[0007] a nose cylinder extending from the front end of the base cylinder;

[0008] A knife rod cylinder extends from the front end of the nose cylinder, the front portion of the knife rod cylinder is arc-shaped, and the arc-shaped front portion has a cutting edge defined by multiple cutting surfaces; wherein,

[0009] The nose cylinder is provided with two symmetrical and mutually parallel flat portions, which respectively correspond to the concave surface and convex surface of the arc-shaped front portion. The cutting surface where the cutting edge is located is perpendicular to the extension plane of the flat portion. The base cylinder, the nose cylinder and the shank cylinder are an integrated structure made of metal.

[0010] As a further improvement of the above technical solution:

[0011] Optionally, the total length of the small medical ultrasonic horn is less than 42 mm.

[0012] Optionally, the arc-shaped front portion includes a convex cutting surface and a concave cutting surface for cutting the concave surface and the convex surface, and the cutting edge is formed by cutting the side surface of the arbor cylinder defined between the convex cutting surface and the concave cutting surface.

[0013] Optionally, a front end of the arc-shaped front portion is provided with a plurality of chamfers.

[0014] Optionally, the width of the cutting edge is in the range of 0.35 mm to 0.45 mm.

[0015] Optionally, a conical transition portion is provided between the nose cylinder and the shank cylinder.

[0016] Optionally, the diameter of the base cylinder is 6 mm.

[0017] Optionally, the metal is a titanium alloy.

[0018] Optionally, the medical small ultrasonic horn is heat-treated.

[0019] Optionally, the small medical ultrasonic horn is surface-treated.

[0020] The beneficial effects of the small medical ultrasonic horn provided in this application are:

[0021] The present application provides a small medical ultrasonic horn comprising a cylindrical base, a cylindrical nose, and a cylindrical shank. The cylindrical base is internally threaded for removable connection to a transducer or other external component. The cylindrical nose extends axially from the front end of the base and features two symmetrical, parallel flattened sections on its circumference. These flattened sections mate with the aluminum flange of the transducer assembly, ensuring accurate positioning of the blade tip and facilitating pre-tightening during assembly. The shank extends from the front end of the nose and features an arc-shaped front portion. This arc adjusts the blade tip's vibration mode, superimposing bending vibration on longitudinal vibration, thereby creating a longer effective cutting line. Compared to traditional longitudinal vibration cutting, bending vibration improves cutting efficiency. The curved front portion of the shank features a cutting edge defined by multiple cutting surfaces. Compared to traditional cylindrical blades, this blade has a larger blade width and cutting area, resulting in better coagulation and sealing effects. The cutting surfaces of the cutting edges are perpendicular to the plane extending from the flattened sections to precisely control the vibration direction of the curved front portion. The base cylinder, nose cylinder and shank cylinder are integrally formed of metal materials, ensuring the mechanical strength and vibration transmission efficiency of the overall structure while avoiding energy loss caused by connection gaps.

[0022] Furthermore, the total length of the medical miniature ultrasonic horn is optimized to less than 42 mm. Compared to existing ultrasonic horns, the ultrasonic horn of the present application is more compact, thereby improving the operational freedom of the instrument in confined surgical spaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 This is a schematic diagram of the main structure of the small medical ultrasonic horn provided in this application;

[0025] Figure 2 A schematic diagram of the top view of the medical small ultrasonic horn provided in this application;

[0026] Figure 3 A schematic diagram of the three-dimensional structure of a small medical ultrasonic horn provided in this application;

[0027] Figure 4 for Figure 1 Schematic diagram of the local enlarged structure in;

[0028] Figure 5 for Figure 2 Schematic diagram of the locally enlarged structure in .

[0029] Among them, the reference numerals in the figures are:

[0030] 1. Base cylinder; 2. Nose cylinder;

[0031] 21. Flat part; 3. Cylinder of tool bar;

[0032] 31. cutting edge; 32. convex cutting surface;

[0033] 33. Concave cutting surface; 4. Conical transition portion;

[0034] 41. Variable amplitude steps. DETAILED DESCRIPTION

[0035] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0038] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0039] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0040] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of the disclosure of this utility model.

[0041] In the following description, suffixes such as "circuit", "component", "assembly" or "unit" are used only to facilitate the description of the present invention and have no specific meaning. Therefore, they can be used interchangeably.

[0042] The present invention will be further described in detail below through specific implementations in conjunction with the accompanying drawings.

[0043] like Figures 1 to 3 As shown, the present application provides a small medical ultrasonic horn, comprising a base cylinder 1, a nose cylinder 2 and a knife rod cylinder 3.

[0044] The base cylinder 1 is internally threaded for removable connection to a transducer or other external components. The nose cylinder 2 extends axially from the front end of the base cylinder 1 and is circumferentially provided with two symmetrical, parallel flat portions 21. These flat portions 21 are designed to mate with the aluminum flange of the transducer assembly, ensuring accurate positioning of the cutter head and facilitating pre-tightening during assembly. The shank cylinder 3 extends from the front end of the nose cylinder 2 and has an arc-shaped front portion. This arc-shaped structure adjusts the vibration mode of the cutter head, superimposing bending vibration on longitudinal vibration, thereby forming a longer effective cutting line. Compared to traditional longitudinal vibration cutting, bending vibration improves cutting efficiency. The arc-shaped front portion of the shank cylinder 3 is provided with a cutting edge 31 defined by multiple cutting surfaces. Compared to traditional cylindrical blades, this has a larger blade width and cutting area, resulting in better coagulation and sealing effects. The cutting surface of the cutting edge 31 is perpendicular to the extension plane of the flat portion 21 to precisely control the vibration direction of the arc-shaped front portion. It should be noted that the perpendicular relationship between the cutting surface of the cutting edge 31 and the extended plane of the flat portion 21, in addition to being strictly limited to a 90° intersection, can deviate within a certain range of angles, such as 85° or 100° intersections, and these are equivalent replacements for the plane angles and should also fall within the scope of protection of this application. The base cylinder 1, nose cylinder 2, and shank cylinder 3 are integrally formed of metal materials to ensure the mechanical strength and vibration transmission efficiency of the overall structure, while avoiding energy loss due to connection gaps.

[0045] The medical small ultrasonic horn of the present application has a compact structure and is suitable for scenarios with strict requirements on operating space in minimally invasive surgery. It can effectively improve the accuracy and controllability of ultrasonic cutting.

[0046] like Figure 1As shown, in a specific embodiment of the present application, the total length L of the small medical ultrasonic horn is optimized to be less than 42 mm. The specific length can be 41 mm, 40 mm, 39 mm, 38 mm, 37 mm, 36 mm, 37 mm, 36 mm, 35 mm, 34 mm, 33 mm, 32 mm, 31 mm, 30 mm, 29 mm, 28 mm, 27 mm, 26 mm, or 25 mm.

[0047] Compared with the existing ultrasonic horn, the ultrasonic horn of the present application has a more compact structure, thereby improving the operational freedom of the instrument in a narrow surgical space. By shortening the overall size of the base cylinder 1, the nose cylinder 2 and the shank cylinder 3, the horn can achieve more flexible angle adjustment within a limited surgical field of view while maintaining the efficiency of ultrasonic energy transmission. Specifically, the shorter rod length enables the end of the instrument to adapt to more complex operating paths while ensuring the controllability of the vibration mode. This size optimization solves the problem of limited operation of traditional ultrasonic knives due to the excessive length of the rod. In addition, the one-piece metal structure ensures sufficient mechanical strength while reducing the size, avoiding the influence of the transmission stability of ultrasonic vibration due to size reduction.

[0048] like Figure 1 and Figure 2 As shown, in a specific embodiment of the present application, the front portion of the arbor cylinder 3 adopts an arc structure to increase the radial vibration of the cutter head and thereby realize two-dimensional composite vibration of the cutter head to achieve a better cutting effect.

[0049] like Figure 1 and Figure 2 As shown, in a specific embodiment of the present application, the arc-shaped front portion of the arbor cylinder 3 is provided with a specific cutting surface structure, including a convex cutting surface 32 located on the convex surface of the arc and a concave cutting surface 33 located on the concave surface of the arc. Among them, the arc radius r1 of the convex cutting surface 32 is 75mm, and the arc radius r2 of the concave cutting surface 33 is 10mm. When the arc radius is too large, the tool vibration mode will shift to short-wavelength bending vibration, which will not only lead to a decrease in energy transfer efficiency, but also produce obvious sharp noise; and when the arc radius is too small, the vibration mode will be too close to pure longitudinal vibration, resulting in insufficient cutting line length, affecting the actual cutting effect. This parameter selection not only ensures the working efficiency of the cutting edge 31 of the tool head, but also reduces its working noise.

[0050] The cutting edge 31 is specifically formed by cutting the side surface of the arbor cylinder 3 defined between the convex cutting surface 32 and the concave cutting surface 33, thereby forming a double-sided cutting structure, so that the tool can simultaneously use the convex surface and the concave surface to perform cutting operations during the vibration process.

[0051] like Figure 4 and Figure 5As shown, in a specific embodiment of the present application, the front end of the arc-shaped front part, that is, the position of the blade tip, is provided with a plurality of chamfers. Specifically, there is a chamfer R1 where the convex cutting surface 32 meets the front end, a chamfer R2 where the concave cutting surface 33 meets the front end, and a chamfer R3 where the cutting surface where the cutting edge 31 is located meets the front end. The radius range of the aforementioned chamfers is controlled between 0.3mm and 1.5mm, so as to effectively reduce the risk of accidental damage to non-target tissues during surgery while ensuring cutting efficiency. It should be noted that when the chamfer radius is less than 0.3mm, its protective effect is insufficient; and when it exceeds 1.5mm, it will affect the sharpness and energy transfer efficiency of the cutting edge 31. The synergistic effect of the three chamfers enables the ultrasonic scalpel to improve the safety of surgical operations while maintaining cutting performance.

[0052] like Figure 1 As shown, in a specific embodiment of the present application, the width range H of the cutting blade 31 is 0.35 mm -0.45 mm. The setting of this size range is based on the consideration of the balance between cutting speed and tissue closure effect: when the width of the cutting blade 31 is in the range of 0.35 mm to 0.40 mm, its narrower blade structure is conducive to increasing the cutting speed; and when the width increases to the range of 0.40 mm to 0.45 mm, the increased blade contact area can significantly improve the tissue closure effect. Experimental data show that the width range of 0.38 mm to 0.42 mm can achieve the best balance between cutting efficiency and hemostatic effect. This parameter design allows the surgeon to select the appropriate width of the cutting blade 31 according to specific surgical needs, while ensuring surgical efficiency and meeting the processing requirements of different tissue characteristics. By precisely controlling the width parameters of the cutting blade 31, this embodiment achieves adjustable optimization of cutting performance while maintaining the efficiency of ultrasonic vibration energy transmission.

[0053] like Figure 1 and Figure 2 As shown, in a specific embodiment of the present application, a conical transition portion 4 is provided between the nose cylinder 2 and the shank cylinder 3. The transition portion adopts a gradual structure, with its base connected to the nose cylinder 2 having a diameter of 4.6 mm, and its tip forming a smooth transition with the shank cylinder 3 having a diameter of 1.6 mm. The conical transition portion 4 can effectively improve the stress distribution while adjusting the transducer amplitude ratio, reduce the stress concentration phenomenon at the connection between the nose cylinder 2 and the shank cylinder 3, and thus improve the structural reliability of the instrument during operation. In order to further enhance the vibration transmission efficiency, an amplitude step 41 of a specific size can be provided between the base cylinder 1 and the nose cylinder 2, which can increase the output amplitude of the transducer without increasing the overall size.

[0054] In a specific embodiment of the present application, the diameter of the base cylinder 1 is 6 mm, so that it can be coaxially connected to the transducer core with the same diameter of 6 mm to avoid vibration mode distortion caused by size mismatch.

[0055] In a specific embodiment of the present application, a small medical ultrasonic horn is specifically made of titanium alloy rods through one-piece molding. The material selection is based on the excellent mechanical properties and biocompatibility characteristics of titanium alloy. Its elastic modulus is about 110GPa and its density is 4.5 g / cm3, which can meet the strength-to-weight ratio requirements required for ultrasonic vibration transmission. Specifically, the base cylinder 1, nose cylinder 2 and shank cylinder 3 made of titanium alloy can control the overall weight within the range required for surgical operation while maintaining structural integrity. In addition, the biological inertness of titanium alloy enables it to directly contact human tissue, meeting the biosafety requirements of medical devices. This material selection takes into account the vibration performance, structural reliability and clinical applicability of the instrument. In other specific embodiments, the small medical ultrasonic horn can also be commonly used in one-piece molding methods such as 3D printing.

[0056] In a specific embodiment of the present application, a small medical ultrasonic horn is heat-treated. The heat treatment process includes two stages: aging treatment and tempering treatment. By controlling parameters such as heating temperature, holding time and cooling rate, the microstructure of the titanium alloy material is optimized. The mechanical properties of the base cylinder 1, the nose cylinder 2 and the shank cylinder 3 after heat treatment are significantly improved, and their tensile strength is improved while maintaining sufficient toughness. In addition, the heat treatment process also eliminates the residual stress generated during the processing process, so that the horn maintains dimensional stability during long-term use, ensuring the accurate transmission of ultrasonic vibration energy.

[0057] In a specific embodiment of the present application, a small medical ultrasonic horn is surface-treated. This surface treatment includes sputtering and coating the base cylinder 1, nose cylinder 2, and blade cylinder 3. This effectively reduces tissue adhesion during surgery, improves the biocompatibility of the blade tip, and enhances its corrosion resistance, ensuring long-term stability and reliability in the surgical environment and providing a solid foundation for the stable operation of the transducer.

[0058] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A small medical ultrasonic horn, characterized in that: include: A cylindrical base (1) provided with an internal thread; A nose cylinder (2) extending from the front end of the base cylinder (1); A knife rod cylinder (3) extends from the front end of the nose cylinder (2), and the front portion of the knife rod cylinder (3) is arc-shaped, and the arc-shaped front portion has a cutting edge (31) defined by multiple cutting surfaces; wherein, The nose cylinder (2) is provided with two symmetrical and mutually parallel flat portions (21), the two flat portions (21) respectively corresponding to the concave surface and the convex surface of the arc-shaped front portion, the cutting surface where the cutting edge (31) is located is perpendicular to the extension plane of the flat portion (21), and the base cylinder (1), the nose cylinder (2) and the shank cylinder (3) are an integrated structure made of metal.

2. The small medical ultrasonic horn according to claim 1, characterized in that: The total length of the small medical ultrasonic horn is less than 42 mm.

3. The small medical ultrasonic horn according to claim 2, characterized in that: The arc-shaped front portion includes a convex cutting surface (32) and a concave cutting surface (33) for cutting the concave surface and the convex surface, and the cutting edge (31) is formed by cutting the side surface of the arbor cylinder (3) defined between the convex cutting surface (32) and the concave cutting surface (33).

4. The small medical ultrasonic horn according to claim 3, characterized in that: The front end of the arc-shaped front portion is provided with a plurality of chamfers.

5. The small medical ultrasonic horn according to any one of claims 2 to 4, characterized in that: The width of the cutting edge (31) ranges from 0.35 mm to 0.45 mm.

6. The small medical ultrasonic horn according to any one of claims 2 to 4, characterized in that: A conical transition portion (4) is provided between the nose cylinder (2) and the shank cylinder (3).

7. The small medical ultrasonic horn according to any one of claims 2 to 4, characterized in that: The diameter of the base cylinder (1) is 6 mm.

8. The small medical ultrasonic horn according to any one of claims 1 to 4, characterized in that: The metal is a titanium alloy.

9. The small medical ultrasonic horn according to any one of claims 1 to 4, characterized in that: The medical small ultrasonic horn is heat-treated.

10. The small medical ultrasonic horn according to any one of claims 1 to 4, characterized in that: The medical small ultrasonic horn is surface-treated.

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