Saw-toothed ultrasonic osteotome and ultrasonic operating handle

Abstract

The utility model relates to the technical field of ultrasonic operating knives, especially to a sawtooth ultrasonic bone knife and an ultrasonic operating handle, which comprise a rod body and a tool bit integrally formed at the head end of the rod body, the rod body comprises, in sequence along the direction from back to front, a base section, a first transition section, an amplitude variation section and a second transition section of an integral structure, the diameter of the first transition section is greater than that of the second transition section; further comprising cutting teeth integrally formed with the tool bit, a plurality of cutting teeth are continuously distributed on at least one edge of the tool bit in the width direction to form a first cutting section; the cutting teeth are symmetrical along the line connecting the tooth tip to the middle of the tooth root, so that the cutting force in the positive direction and the reverse direction can be balanced when the cutting section vibrates axially, and the beneficial effects are that the cutting teeth are symmetrical along the line connecting the tooth tip to the middle of the tooth root, the cutting force in the positive direction and the reverse direction can be balanced when the cutting section vibrates axially, and the cutting consistency of the first cutting section is improved when the ultrasonic bone knife vibrates, and the cutting effect is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of ultrasonic scalpels, and more particularly to a serrated ultrasonic bone scalpel and an ultrasonic operating handle. Background Technology

[0002] In the field of medical surgery, especially orthopedic surgery, the precise cutting and separation of bone tissue is crucial. The working principle of an ultrasonic bone scalpel is to use the mechanical energy generated by ultrasonic vibrations to cut bone tissue. When ultrasonic waves are converted into mechanical vibrations by a transducer, these vibrations are transmitted to the blade tip, causing it to vibrate minutely at extremely high frequencies, thus achieving the cutting effect.

[0003] Existing serrated ultrasonic bone cutters suffer from easy tooth wear, resulting in a significant decrease in cutting force, low cutting efficiency, poor heat dissipation, and a limited variety of cutter head designs, which are not conducive to improving cutting efficiency. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, this utility model provides a serrated ultrasonic bone scalpel and ultrasonic operating handle, which solves the problems of low cutting efficiency, poor heat dissipation and single blade type in the prior art, greatly improves surgical efficiency, avoids thermal damage to patients and improves surgical flexibility.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0008] In a first aspect, this utility model provides a serrated ultrasonic bone scalpel, comprising a rod body and a blade head integrally formed at the head end of the rod body. The rod body includes, in sequence from back to front, an integrally structured base section, a first transition section, an amplitude-changing section, and a second transition section. The diameter of the first transition section is larger than the diameter of the second transition section. It also includes cutting teeth integrally formed with the blade head. Multiple cutting teeth are distributed at least continuously on one edge in the width direction of the blade head to form a first cutting section. The cutting teeth are symmetrical along the line connecting the tooth tip to the middle of the tooth root, so as to balance the positive and negative cutting forces when the cutting section vibrates axially.

[0009] In one technical solution of this utility model, the cutting teeth are also continuously distributed on another edge in the width direction of the cutter head to form a second cutting segment, and the first cutting segment and the second cutting segment are symmetrical along the axis of the cutter head.

[0010] In one technical solution of this utility model, relief grooves are provided on both width planes of the cutter head, and the relief grooves extend towards the axis of the cutter head.

[0011] In one technical solution of this utility model, the front end of the cutter head extends forward to form a cutting end.

[0012] In one technical solution of this utility model, the ratio of the projected area F of the cutting profile formed by all the cutting teeth along its own axis to the projected area of ​​the base segment along its own axis is 1:5-1:7.

[0013] In one technical solution of this utility model, the angle between the first cutting segment and the axis of the blade head is 2°-5°, and the front end of the first cutting segment is closer to the axis of the blade head than the rear end of the first cutting segment.

[0014] In one technical solution of this utility model, the tooth height A of the cutting tooth is 0.2mm-0.5mm, the tooth width B is 0.4mm-0.8mm, and the tooth tip angle C is 40°-80°; the diameter of the first transition section is 6mm-9mm, the fillet size of the amplitude-changing section is 10mm-30mm, the second transition section is a cone with the small end facing forward, the diameter of the rear end of the second transition section is 3mm-5mm, and the taper of the second transition section is 0.5°-1.5°.

[0015] In one technical solution of this utility model, the rod body also includes a wrench means located between the base and the first transition section. Two wrench slots symmetrical along the axis of the rod body are provided on the radial outer wall of the wrench means to accommodate torque wrenches.

[0016] In one technical solution of this utility model, the front end of the second transition section is provided with an inclined surface, the inclined surface includes two first cutting surfaces opposed along the first radial direction and two second cutting surfaces opposed along the second radial direction, the first radial direction and the second radial direction are perpendicular, and the thickness of the front end of the second transition section along the first radial direction is 0.6mm-1mm; the two width planes of the cutter head are connected to the two first cutting surfaces respectively.

[0017] Secondly, this utility model provides an ultrasonic operating handle, including the ultrasonic bone scalpel in the above-mentioned technical solution, and also including a shell, an ultrasonic transducer, and a head cap assembly. The ultrasonic transducer is supported inside the shell, the head cap assembly is fixedly connected to the front end of the shell, the ultrasonic bone scalpel is connected to the front end of the ultrasonic transducer, and the scalpel head extends out of the head cap assembly from inside the head cap assembly; the inner cavity of the head cap assembly forms a liquid channel, and the gap between the front end of the head cap assembly and the ultrasonic bone scalpel forms the outlet of the liquid channel; the liquid channel circumferentially surrounds the outer periphery of the front end of the scalpel handle, so that the liquid channel forms a cooling cavity on the outer periphery of the ultrasonic bone scalpel.

[0018] (III) Beneficial Effects

[0019] The beneficial effects of this utility model are as follows: The serrated ultrasonic bone scalpel of this utility model has a base section that serves as the support for the entire ultrasonic bone scalpel and is connected to the amplitude transformer of the ultrasonic transducer. This connection is established via a threaded connection, ensuring stable vibration transmission and the stability of the ultrasonic bone scalpel. The first transition section facilitates the transition from the wrench to the amplitude transformer section. The amplitude transformer section amplifies the ultrasonic vibration, converting the minute vibrations of the ultrasonic drive device into a larger amplitude of the blade head, thereby achieving a highly efficient cutting effect. The diameter of the second transition section is smaller than that of the first transition section, which helps reduce energy loss during vibration transmission and ensures that the vibration is mainly concentrated on the blade head. The cutting teeth are integrally formed with the blade head, ensuring their high strength and durability.

[0020] The cutting teeth are continuously distributed along at least one edge in the width direction of the cutter head, forming a first cutting segment. This helps to provide a consistent cutting force during the cutting process and improves cutting efficiency. Since the cutting teeth are symmetrical along the line connecting the tooth tip to the middle of the tooth root, they can balance the positive and negative cutting forces when the cutting segment vibrates axially, thereby improving the cutting consistency of the first cutting segment during ultrasonic bone scalpel vibration and enhancing the cutting effect.

[0021] Furthermore, due to its symmetrical design, the wear of the cutting teeth has a relatively low impact on cutting efficiency, which helps to ensure the surgical efficiency when using this serrated ultrasonic bone scalpel. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a serrated ultrasonic bone scalpel according to an embodiment of the present invention;

[0023] Figure 2 This utility model Figure 1 A magnified schematic diagram of the structure at point 100 in the middle;

[0024] Figure 3 This is a schematic diagram of the structure of a serrated ultrasonic bone scalpel according to another embodiment of the present invention;

[0025] Figure 4 This utility model Figure 3 A magnified schematic diagram of the structure at point 200 in the middle;

[0026] Figure 5 This is a schematic diagram of the structure of a serrated ultrasonic bone scalpel according to another embodiment of the present invention;

[0027] Figure 6 This utility model Figure 5 A magnified schematic diagram of the structure at point 300 in the middle;

[0028] Figure 7 This is one of the structural schematic diagrams of a serrated ultrasonic bone scalpel according to another embodiment of the present invention;

[0029] Figure 8 This is the second schematic diagram of the serrated ultrasonic bone scalpel of another embodiment of the present invention;

[0030] Figure 9 This is the third schematic diagram of the serrated ultrasonic bone scalpel of another embodiment of the present invention;

[0031] Figure 10 This utility model Figure 9 A magnified schematic diagram of the structure at point 400 in the middle;

[0032] Figure 11 This is a schematic diagram of the ultrasonic operating handle and the serrated ultrasonic bone scalpel in this utility model.

[0033] [Explanation of Labels in the Attached Image]

[0034] 1. Base section;

[0035] 2. Manipulation methods;

[0036] 3. First transition section;

[0037] 4. Variable amplitude section;

[0038] 5. Second transition section;

[0039] 6. Inclined surface; 61. First cutting surface; 62. Second cutting surface;

[0040] 7. Cutting teeth;

[0041] 8. Leaving slot;

[0042] 9. Cutting end;

[0043] 10. Blade tip;

[0044] X, the first segment;

[0045] Y, the second cutting segment;

[0046] 11. Outer shell;

[0047] 12. Ultrasonic transducer;

[0048] 13. Head cap assembly; D. Liquid channel; E. Cooling chamber. Detailed Implementation

[0049] To better explain and facilitate understanding of this utility model, the following description is provided in conjunction with the appendix. Figures 1-11 This invention will be described in detail through specific embodiments. Wherein, directional terms such as "upper" and "lower" are used in this document. Figure 1 The orientation is used as a reference.

[0050] Example 1:

[0051] Reference Figures 1-11 This utility model provides a serrated ultrasonic bone scalpel, including a rod and a blade head 10 integrally formed at the head end of the rod. The rod includes, in a forward direction, an integrally formed base section 1, a wrench 2, a first transition section 3, an amplitude-changing section 4, and a second transition section 5. The axes of the rod and the blade head 10 coincide, and the diameter of the first transition section 3 is larger than the diameter of the second transition section 5. It also includes cutting teeth 7 integrally formed with the blade head 10. Multiple cutting teeth 7 are distributed continuously on at least one edge in the width direction of the blade head 10 to form a first cutting segment X. The cutting teeth 7 are symmetrical along the line connecting the tooth tip to the middle of the tooth root, so as to balance the positive and negative cutting forces when the cutting segment vibrates axially. Specifically, the forward direction along the axial direction of the rod is positive, and the backward direction along the axial direction of the rod is negative.

[0052] In this embodiment, the base section 1 serves as the support for the entire ultrasonic bone scalpel and is connected to the amplitude transformer of the ultrasonic transducer 11 via a threaded connection to ensure stable vibration transmission and the stability of the ultrasonic bone scalpel. The first transition section 3 facilitates the transition from the wrench 2 to the amplitude transformer section 4. The amplitude transformer section 4 amplifies the ultrasonic vibration, converting the minute vibrations of the ultrasonic drive device into a larger amplitude of the blade head 10, thereby achieving a highly efficient cutting effect. The diameter of the second transition section 5 is smaller than that of the first transition section 3, which helps reduce energy loss during vibration transmission and ensures that the vibration is mainly concentrated on the blade head 10. The cutting teeth 7 are integrally formed with the blade head 10, ensuring their high strength and durability.

[0053] The cutting teeth 7 are continuously distributed on at least one edge of the cutter head 10 in the width direction, forming a first cutting segment X, which helps to provide a consistent cutting force during the cutting process and improves cutting efficiency. Since the cutting teeth 7 are symmetrical along the line connecting the tooth tip to the middle of the tooth root, they can balance the positive and negative cutting forces when the cutting segment vibrates axially, thereby improving the cutting consistency of the first cutting segment X when the ultrasonic bone cutter vibrates and improving the cutting effect.

[0054] The tooth height A of the cutting tooth 7 is 0.2mm-0.5mm, preferably 20mm; the tooth width B is 0.4mm-0.8mm, preferably 0.6mm; and the tooth tip angle C is 40°-80°, preferably 60°.

[0055] The cutter head 10, designed with these dimensions, boasts high strength and cutting efficiency. This design avoids tooth deformation caused by processing stress during manufacturing, and also prevents wear and tear on the cutter head 10 during use, which would reduce cutting efficiency.

[0056] The diameter of the first transition section 3 is 6mm-9mm, preferably 8mm. The radius of the corner of the amplitude-changing section 4 is 10mm-30mm, preferably 20mm. The second transition section 5 is a cone with the small end facing forward. The diameter of the rear end of the second transition section 5 is 3mm-5mm, preferably 3.5mm. The taper of the second transition section 5 is 0.5°-1.5°, preferably 0.95°.

[0057] The conical second transition section 5 can further increase the amplitude of the cutter head 10. By setting its diameter to 3mm-5mm and its taper to 0.5°-1.5°, the amplitude of the cutter head 10 can be significantly increased while ensuring the structural strength and service life of the second transition section 5, thereby improving the cutting efficiency.

[0058] The rod also includes a wrench 2 located between the base and the first transition section 3. Two wrench slots symmetrical along the rod axis are provided on the radial outer wall of the wrench 2 to accommodate torque wrenches. The inclined surface 6 includes two first cutting surfaces 61 opposite each other along the first radial direction and two second cutting surfaces 62 opposite each other along the second radial direction. The first and second radial directions are perpendicular. The thickness of the front end of the second transition section 5 along the first radial direction is 0.6mm-1mm, preferably 0.8mm. The two width planes of the cutter head 10 are connected to the two first cutting surfaces 61 respectively.

[0059] Wrench 2 is used to adapt to a torque wrench to complete the loading and unloading of the ultrasonic bone cutter and the amplitude transformer, ensuring loading and unloading efficiency. The symmetrical arrangement of the wrench positions reduces design complexity and ensures that the ultrasonic waves propagate along the axial direction. The design of the first cutting surface 61 and the second cutting surface 62 also reduces the impact on the resonant frequency of the rod, while realizing the transition between the second transition section 5 and the cutter head 10, so that the vibration can be transmitted smoothly.

[0060] Setting the thickness of the front end of the second transition section 5 along the first radial direction within 0.6mm-1mm ensures both the strength of the cutting head 10 and improves cutting efficiency. If the blade is too thin, it is prone to breakage when cutting bone, and the bending of the cutting head 10 alters its structure, causing a change in its resonant frequency. When the resonant frequency exceeds the allowable range of the equipment, the cutting head 10 stops working, affecting cutting efficiency. If the blade is too thick, the contact area with bone tissue is too large, leading to reduced cutting efficiency. The aforementioned thickness range of 0.6mm-1mm represents a well-balanced choice.

[0061] Example 2:

[0062] Reference Figure 3 and Figure 4 , Figures 7-10 In addition to possessing all the technical solutions of the above embodiments, the embodiments of this utility model further possess the following technical solutions:

[0063] The cutting teeth 7 are also continuously distributed on another edge in the width direction of the cutter head 10 to form a second cutting segment Y. The first cutting segment X and the second cutting segment Y are symmetrical along the axis of the cutter head 10.

[0064] In this embodiment, the cutter head 10 has a first cutting segment X and a second cutting segment Y, which are symmetrical. Therefore, the two can be used alternately, thereby providing a hardware basis for more cutting methods, such as grooving, flaring, and alternating cutting.

[0065] The blade head 10 has relief grooves 8 on both of its width planes, which extend towards the axis of the blade head 10. The relief grooves 8 reduce the contact area between the blade head 10 and the bone, thereby reducing heat generation, effectively avoiding thermal damage, and improving the stability of the blade head 10.

[0066] The ratio of the projected area F of the cutting profile formed by all the cutting teeth 7 along its own axis to the projected area of ​​the base segment 1 along its own axis is 1:5-1:7, preferably 1:6.

[0067] With the above settings, the amplitude at base segment 1 is 30 micrometers and the amplitude at tooth tip 9 is 180 micrometers, which effectively improves the cutting efficiency of the product and ensures the safety and stability of the product.

[0068] Currently, the titanium alloy material used in ultrasonic scalpel heads typically has a yield strength between 830 MPa and 960 MPa. For product safety, a safety factor of 3 is used, and the yield strength is set at 830 MPa. Therefore, the maximum stress inside the scalpel head should not exceed 270 MPa. Simulation analysis shows that when the ratio is 1:5, the internal stress is 167 MPa; when the ratio is 1:6, the internal stress is 210 MPa; and when the ratio is 1:7, the internal stress is 260 MPa. Due to some deviation in the simulation results, a ratio of 1:6 was chosen to maximize the amplitude within a safe range, thereby improving the product's cutting efficiency.

[0069] Example 3:

[0070] Reference Figures 7-10 In addition to possessing all the technical solutions of Embodiment 2 described above, the embodiments of this utility model further possess the following technical solutions:

[0071] The cutting end 9 extends forward from the front end of the cutter head 10.

[0072] In this embodiment, the cutting end 9 is used to perform opening work on the bone or to axially break bone, thereby enriching the function of the ultrasonic bone cutter. Specifically, the impact part can be configured to have a protruding triangular structure to ensure its structural strength while ensuring its breaking performance.

[0073] Example 4:

[0074] Reference Figures 1-4 , Figures 7-10 In addition to possessing all the technical solutions of any one of embodiments 1-3 above, the embodiments of this utility model further possess the following technical solutions:

[0075] The angle between the first cutting segment X and the axis of the cutter head 10 is 2°-5°, and the front end of the first cutting segment X is closer to the axis of the cutter head 10 than the rear end of the first cutting segment X. This arrangement of the first cutting segment X and the second cutting segment Y allows the cutting teeth to be arranged at a certain angle and in sequence, which not only conforms to ergonomics but also effectively reduces the jamming phenomenon during use.

[0076] Example 5:

[0077] Figures 1-11 In addition to providing an ultrasonic operating handle, the embodiments of this utility model include the ultrasonic bone scalpel in any of the above embodiments, and also include a housing 11, an ultrasonic transducer 12, and a head cap assembly 13. The ultrasonic transducer 12 is supported inside the housing 11, and the head cap assembly 13 is fixedly connected to the front end of the housing 11. The ultrasonic bone scalpel is connected to the front end of the ultrasonic transducer 12, and the scalpel tip extends out of the head cap assembly 13. The inner cavity of the head cap assembly 13 forms a liquid channel D, and the gap between the front end of the head cap assembly 13 and the ultrasonic bone scalpel forms the outlet of the liquid channel D. The liquid channel D circumferentially surrounds the outer periphery of the front end of the handle, so that the liquid channel D forms a cooling cavity E on the outer periphery of the ultrasonic bone scalpel.

[0078] In this embodiment, a medium liquid, such as physiological saline, can be introduced into the liquid channel D. Under natural flow or negative pressure at the front end of the suction channel, the medium liquid will flow over the part of the scalpel exposed at the tip cap assembly 13. Under the action of high-frequency vibration, the medium liquid will be atomized, and at the same time, the temperature of the scalpel will be reduced, improving its safety and cutting efficiency.

[0079] At the same time, the atomized medium can flush the surgical site, improve visibility during the surgery, and thus improve the safety of the procedure.

[0080] The cooling chamber E can further reduce the temperature of the rod and improve the stability of the ultrasonic bone scalpel in use.

[0081] It can be understood that, except for conflicting parts, the above embodiments 1-6 can be freely combined to form other embodiments of this utility model.

[0082] In the description of this utility model, it should be understood that 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0083] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0084] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0085] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0086] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A serrated ultrasonic bone scalpel, characterized in that: The rod includes a rod body and a cutter head (10) integrally formed at the head end of the rod body. The rod body includes, in sequence from back to front, an integral base section (1), a first transition section (3), a variable amplitude section (4), and a second transition section (5). The diameter of the first transition section (3) is larger than the diameter of the second transition section (5). It also includes cutting teeth (7) integrally formed with the cutter head (10), and a plurality of cutting teeth (7) are distributed at least continuously on one edge of the cutter head (10) in the width direction to form a first cutting segment (X); The cutting teeth (7) are symmetrical along the line connecting the tip to the middle of the root, so as to balance the positive and negative cutting forces when the cutting segment vibrates axially.

2. The serrated ultrasonic bone scalpel as described in claim 1, characterized in that: The cutting teeth (7) are also continuously distributed on another edge of the cutter head (10) in the width direction to form a second cutting segment (Y), and the first cutting segment (X) and the second cutting segment (Y) are symmetrical along the axis of the cutter head (10).

3. The serrated ultrasonic bone scalpel as described in claim 2, characterized in that: The cutter head (10) has relief grooves (8) on both width planes, and the relief grooves (8) extend in the direction of the axis of the cutter head (10).

4. The serrated ultrasonic bone scalpel as described in claim 2, characterized in that: The cutting end (9) extends forward from the front end of the cutter head (10).

5. The serrated ultrasonic bone scalpel as described in claim 4, characterized in that: The ratio of the projected area F of the cutting profile formed by all the cutting teeth (7) along its own axis to the projected area of ​​the base segment (1) along its own axis is 1:5-1:

7.

6. The serrated ultrasonic bone scalpel as described in any one of claims 1-5, characterized in that: The angle between the first cutting segment (X) and the axis of the blade (10) is 2°-5°, and the front end of the first cutting segment (X) is closer to the axis of the blade (10) than the rear end of the first cutting segment (X).

7. The serrated ultrasonic bone scalpel as described in claim 1, characterized in that: The cutting tooth (7) has a tooth height A of 0.2mm-0.5mm, a tooth width B of 0.4mm-0.8mm, and a tooth tip angle C of 40°-80°. The diameter of the first transition section (3) is 6mm-9mm, the radius of the variable amplitude section (4) is 10mm-30mm, the second transition section (5) is a cone with the small end facing forward, the diameter of the rear end of the second transition section (5) is 3mm-5mm, and the taper of the second transition section (5) is 0.5°-1.5°.

8. The serrated ultrasonic bone scalpel as described in claim 1, characterized in that: The rod also includes a wrench (2) located between the base and the first transition section (3). Two wrench slots symmetrical along the axis of the rod are provided on the radial outer wall of the wrench (2) to accommodate torque wrenches.

9. The serrated ultrasonic bone scalpel as described in claim 1, characterized in that: The front end of the second transition section (5) is provided with a slope (6), the slope (6) includes two first cutting surfaces (61) facing each other along the first radial direction and two second cutting surfaces (62) facing each other along the second radial direction. The first radial direction and the second radial direction are perpendicular. The thickness of the front end of the second transition section (5) along the first radial direction is 0.6mm-1mm. The two width planes of the cutter head (10) are respectively connected to the two first cutting surfaces (61).

10. An ultrasonic operating handle, characterized in that: Includes the ultrasonic bone scalpel as described in any one of claims 1-9; It also includes a housing (11), an ultrasonic transducer (12) and a head cap assembly (13), wherein the ultrasonic transducer (12) is supported inside the housing (11), the head cap assembly (13) is fixedly connected to the front end of the housing (11), the ultrasonic bone scalpel is connected to the front end of the ultrasonic transducer (12), and the scalpel tip extends out of the head cap assembly (13) from inside the head cap assembly (13). The inner cavity of the head cap assembly (13) forms a liquid channel (D), and the gap between the front end of the head cap assembly (13) and the ultrasonic bone scalpel forms the outlet of the liquid channel (D). The liquid channel (D) circumferentially surrounds the outer periphery of the front end of the rod, so that the liquid channel (D) forms a cooling cavity (E) on the outer periphery of the ultrasonic bone scalpel.

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