Ultrasonic scalpel head capable of improving axial displacement uniformity and ultrasonic scalpel

Abstract

The invention provides an ultrasonic scalpel head capable of improving axial displacement uniformity and an ultrasonic scalpel, and belongs to the technical field of medical instruments. The problem that the tissue closing effect is poor due to the fact that longitudinal vibration displacement of the inner diameter and the outer diameter of the bent part of the ultrasonic scalpel head is not uniform is solved. The ultrasonic scalpel comprises a connecting rod and a scalpel head body which are distributed from the near end to the far end of the ultrasonic scalpel, the scalpel head body is fixedly connected with the connecting rod, the scalpel head body is provided with a cutting side, a back cutting side, a first cambered surface side, a second cambered surface side, a first cutting groove and a second cutting groove, the cutting side and the back cutting side are oppositely arranged, and the first cambered surface side and the second cambered surface side are oppositely arranged. The first cutting groove is arranged between the back cutting side and the first cambered surface side, and the second cutting groove is arranged between the cutting side and the first cambered surface side. According to the ultrasonic scalpel head, the displacement difference of the inner diameter and the outer diameter of the cutting side of the ultrasonic scalpel head can be reduced, longitudinal vibration displacement of the cutting side is more uniform, the uniformity of axial displacement of the cutting side can be improved, the vibration mode is stabilized, and the tissue closing capacity of the scalpel head is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of medical instruments, and in particular relates to an ultrasonic surgical knife head and an ultrasonic surgical knife capable of improving axial displacement uniformity. Background Art

[0002] Ultrasonic scalpel, also known as ultrasonic scalpel or ultrasonic cutting hemostatic knife, is a medical device that uses high-frequency ultrasonic energy for surgical operations. It generates high-frequency vibration to generate high temperature and pressure at the tip of the blade, thereby achieving the purpose of cutting tissue and coagulating blood vessels. Ultrasonic scalpels have many advantages such as high cutting efficiency, good flexibility, less bleeding, and few side effects. They are used in almost all surgical fields such as general surgery, cardiac surgery, and thoracic surgery. Ultrasonic scalpels generally include a blade and a waveguide connected to the blade. Since ultrasonic scalpels are driven by ultrasonic vibration waves, blades of different shapes, especially blades with larger curvatures, will affect the overall resonant frequency and vibration mode of the ultrasonic scalpel, reducing the working stability of the ultrasonic scalpel. With the gradual increase in the difficulty of surgery, the requirements for ultrasonic scalpels are also getting higher and higher, so it is very important to improve the working stability of ultrasonic scalpels.

[0003] For the curved blade, since the driving source of the ultrasonic scalpel is an ultrasonic transducer, the ultrasonic transducer outputs an ultrasonic signal which is a high-frequency resonant mechanical wave. The mechanical wave transmits the high-frequency ultrasonic signal to the blade body through the blade body and the connecting rod, so that the blade body presents high-frequency vibration. The curved blade can change the blade from a simple longitudinal vibration to a longitudinal-bending coupled vibration. The inner and outer diameters of the cutting side of the curved blade have a longitudinal displacement difference, that is, an axial displacement difference. The existence of this difference will cause a difference in the cutting and closing effect of the biological tissue being acted on during surgery, which is reflected in the situation that one end of the blood vessel has been closed while the other end has not been closed when cutting and closing the biological blood vessel. However, the ultrasonic scalpel in the prior art has a groove between the back of the blade and the side wall of the blade. On the one hand, it makes the back of the blade sharper, so that the operator can use the back of the blade to separate the tissue or stimulate the ultrasonic scalpel to perform back cutting on the tissue; on the other hand, it can reduce the lateral amplitude of the connection between the back of the blade and the side wall when the blade is excited. Alternatively, a stress-reducing side wall is provided between the back of the blade and the cutting side wall to reduce stress. This cannot reduce the axial displacement difference between the inner and outer diameters of the curved blade head on the cutting side, and there is still the problem of uneven longitudinal displacement of the inner and outer diameters of the curved part of the ultrasonic surgical knife blade head, resulting in poor tissue closure effect. Summary of the invention

[0004] In view of this, in order to solve the problem of uneven longitudinal displacement of the inner and outer diameters of the curved part of the ultrasonic surgical blade head, resulting in poor tissue closure effect, the present invention proposes an ultrasonic surgical blade head and an ultrasonic surgical blade that can improve the uniformity of axial displacement.

[0005] To achieve the above object, the present invention adopts the following technical solutions: An ultrasonic surgical knife head capable of improving the uniformity of axial displacement comprises a connecting rod and a head body distributed from the proximal end to the distal end of the ultrasonic surgical knife, the head body being fixedly connected to the connecting rod, the head body being provided with a cutting side, a back cutting side, a first arc surface side, a second arc surface side, a first cutting groove and a second cutting groove, the cutting side and the back cutting side being arranged opposite to each other, the first arc surface side and the second arc surface side being arranged opposite to each other, the first cutting groove being arranged between the back cutting side and the first arc surface side, and the second cutting groove being arranged between the cutting side and the first arc surface side.

[0006] As a preferred solution of the ultrasonic surgical blade head capable of improving the uniformity of axial displacement, the size relationship between the blade head body and the second cutting groove is:

[0007] Wherein, D1 represents the width of the distal end of the blade body; D2 represents the width of the proximal end of the blade body; L3 represents the length of the second groove; and H1 represents the vertical length of the second groove from the distal end to the proximal end.

[0008] As a preferred solution of the ultrasonic surgical blade head capable of improving the uniformity of axial displacement, the blade head body is further provided with a transition surface, and the transition surface is located between the proximal end of the blade head body and the second arc surface side.

[0009] As a preferred solution of the ultrasonic surgical blade head capable of improving the uniformity of axial displacement, the dimensional relationship between the cutting side and the transition surface is:

[0010] Wherein, L1 represents the length of the cutting side; L2 represents the length of the transition surface.

[0011] As a preferred solution of the above-mentioned ultrasonic surgical blade head capable of improving the uniformity of axial displacement, the blade head body is also provided with a first cutting plane and a second cutting plane, the first cutting plane is arranged at the distal end of the first arc surface side, and the second cutting plane is arranged at the distal end of the second arc surface side.

[0012] As a preferred solution of the ultrasonic surgical blade head capable of improving the uniformity of axial displacement, the relationship between the dimensions of the first cutting plane, the second cutting plane and the second cutting groove is:

[0013] Wherein, L5 is the length of the first cutting plane; L6 is the length of the second cutting plane.

[0014] As a preferred solution of the ultrasonic surgical blade head capable of improving the uniformity of axial displacement, the radius of curvature of a circle having the same curvature degree as the second cutting groove is equal to the radius of curvature of the first arc surface side.

[0015] As a preferred solution of the above-mentioned ultrasonic surgical knife head capable of improving the uniformity of axial displacement, the length of the second groove is 6mm~7mm, the radius of the groove ball of the second groove is 0.2mm~0.3mm; the vertical length of the second groove from the distal end to the proximal end is 1mm~2mm.

[0016] As a preferred solution of the ultrasonic surgical blade head capable of improving the uniformity of axial displacement, the width of the blade head body gradually decreases from the proximal end to the distal end.

[0017] The present invention also provides an ultrasonic surgical knife, comprising the ultrasonic surgical knife head capable of improving the uniformity of axial displacement.

[0018] Compared with the prior art, the ultrasonic surgical blade head and ultrasonic surgical blade provided by the present invention can improve the uniformity of axial displacement and have the following beneficial effects: 1. The present invention provides an ultrasonic surgical blade head and an ultrasonic surgical blade that can improve the uniformity of axial displacement. The ultrasonic surgical blade head that can improve the uniformity of axial displacement reduces the stiffness of the bending area without destroying the stable vibration of the blade head by setting a second groove between the cutting side and the first arc surface side, making the area more susceptible to deformation, thereby amplifying the amplitude of the bending mode, and constructing a cutting surface of a reasonable size at the same time when the axial displacement changes slightly, so that the axial displacement difference between the inner diameter and the outer diameter of the cutting side is reduced. At the same time, tissue closure is achieved by the axial displacement acting on the tissue, and the amplified bending mode can amplify the axial displacement acting on the tissue to a certain extent. By setting the second groove, the displacement difference between the inner diameter and the outer diameter of the cutting side of the ultrasonic surgical blade head is reduced, making the axial displacement of the cutting side more uniform, stabilizing the vibration mode, improving the tissue closure ability of the ultrasonic surgical blade, and improving the safety of the operation and the stability of blood vessel closure.

[0019] 2. The present invention provides an ultrasonic surgical blade head and an ultrasonic surgical blade capable of improving the uniformity of axial displacement. The ultrasonic surgical blade head capable of improving the uniformity of axial displacement has a first groove between the back cutting side and the first arc surface side. By changing the mass distribution and stiffness distribution, the modal characteristics of the blade head are optimized, specific modes, such as first-order or second-order bending modes, are enhanced, and other modes are suppressed. Ensure that the natural frequency of the blade head body matches the driving frequency of the ultrasonic transducer to form resonance. When the ultrasonic wave propagates in the blade head body, it will be reflected and interfered at the structural change (such as the groove area). The first groove changes the propagation path of the ultrasonic wave inside the blade head body. The first groove can guide the propagation of the wave to form a standing wave and generate the maximum amplitude in the working area, so that the wave energy is more concentrated in the cutting area, while reducing the energy consumption in the non-working area.

[0020] 3. The present invention provides an ultrasonic surgical blade head and ultrasonic surgical blade that can improve the uniformity of axial displacement. The blade head body is also provided with a first cutting plane and a second cutting plane. The first cutting plane is arranged at the distal end of the first arc surface side, and the second cutting plane is arranged at the distal end of the second arc surface side. By setting the first cutting plane and the second cutting plane, the overall thickness of the blade head body from the proximal end to the distal end can be reduced, so that the tip of the blade head presents a more "slender" shape, which can make the blade head suitable for more minimally invasive surgical occasions, and the wound caused during the operation is smaller. At the same time, the stress at the connection between the blade head and the blade rod can be reduced, and the service life of the ultrasonic surgical blade can be extended.

[0021] 4. The ultrasonic surgical blade head and ultrasonic surgical blade provided by the present invention can improve the uniformity of axial displacement. The blade head body is also provided with a transition surface, and the transition surface is located between the proximal end of the blade head body and the second arc surface side. The transition surface can change the sudden change between structures, so that the structural change presents a "gentle" shape, optimize the shape of the second arc surface side, reduce the problem of excessive stress at the sudden change caused by the sudden change, reduce the risk of blade breakage, and improve the safety and stability of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic structural diagram of an ultrasonic surgical knife head capable of improving axial displacement uniformity along a first viewing angle provided by a specific embodiment of the present invention; Figure 2 is a schematic structural diagram of an ultrasonic surgical knife head capable of improving axial displacement uniformity along a second viewing angle provided by a specific embodiment of the present invention; Figure 3It is a schematic structural diagram of an ultrasonic surgical knife head capable of improving axial displacement uniformity provided by a specific embodiment of the present invention along a third viewing angle; Figure 4 is a schematic structural diagram of an ultrasonic surgical knife head capable of improving axial displacement uniformity provided by a specific embodiment of the present invention along a fourth viewing angle; Figure 5 is a schematic structural diagram of an ultrasonic surgical knife head capable of improving axial displacement uniformity along a fifth viewing angle provided by a specific embodiment of the present invention; Figure 6 The size diagram of the ultrasonic surgical blade head capable of improving the uniformity of axial displacement provided by the specific embodiment of the present invention is shown in FIG. Figure 1 ; Figure 7 The size diagram of the ultrasonic surgical blade head capable of improving the uniformity of axial displacement provided by the specific embodiment of the present invention is shown in FIG. Figure 2 ; Figure 8 It is an axial displacement diagram of the inner and outer diameters of an ultrasonic surgical blade head capable of improving the uniformity of axial displacement provided by a specific embodiment of the present invention; Fig. 9 It is an axial displacement diagram of the inner and outer diameters of an ultrasonic surgical knife head without the first cutting groove, the second cutting groove, the first cutting plane and the second cutting plane.

[0023] In the figure: 1. Cutting side; 2. Back cutting side; 3. First arc surface side; 4. Second arc surface side; 5. First cutting groove; 6. Second cutting groove; 7. First cutting plane; 8. Second cutting plane; 9. Tip of the cutter head; 10. Transition surface; 11. Outer diameter; 12. Inner diameter. DETAILED DESCRIPTION The following will be combined with the drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0024] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 or an electrical connection; 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 the present invention can be understood according to specific circumstances.

[0025] In the present invention, 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.

[0026] In the description of this embodiment, the terms "upper", "lower", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0027] See also Figure 1-9 To describe this embodiment, the present invention provides an ultrasonic surgical knife head and an ultrasonic surgical knife capable of improving the uniformity of axial displacement. The ultrasonic surgical knife head capable of improving the uniformity of axial displacement comprises a connecting rod and a head body distributed from the proximal end to the distal end of the ultrasonic surgical knife, the head body being fixedly connected to the connecting rod, the head body being provided with a cutting side 1, a back cutting side 2, a first arc surface side 3, a second arc surface side 4, a first cutting groove 5 and a second cutting groove 6, the cutting side 1 is arranged opposite to the back cutting side 2, the first arc surface side 3 is arranged opposite to the second arc surface side 4, the first cutting groove 5 is arranged between the back cutting side 2 and the first arc surface side 3, and the second cutting groove 6 is arranged between the cutting side 1 and the first arc surface side 3.

[0028] In this embodiment, the distal end refers to the end away from the contact point between the operator's hand and the ultrasonic scalpel, and the proximal end refers to the end close to the contact point between the operator's hand and the ultrasonic scalpel. The cutting side 1 is used to cut tissue or to clamp tissue in cooperation with the blade clamp to achieve tissue cutting and closing. The blade body is curved, the first curved side 3 and the second curved side 4 are curved, and the distal end deviates from the central axis of the blade body, so that the distal end of the blade body has a certain curvature, thereby enabling the blade to be used in surgeries on human tissues with a certain curvature, reducing wounds and thermal damage during surgery.

[0029] The ultrasonic surgical knife head capable of improving the uniformity of axial displacement reduces the rigidity of the bending area without destroying the stable vibration of the blade head by setting a second groove 6 between the cutting side 1 and the first curved surface side 3, making the area more susceptible to deformation, thereby amplifying the amplitude of the bending mode, and constructing a cutting surface of a reasonable size at the same time when the axial displacement changes slightly, so that the axial displacement difference between the inner diameter 12 and the outer diameter 11 of the cutting side 1 is reduced. At the same time, tissue closure is achieved by the axial displacement acting on the tissue, and the amplified bending mode can amplify the axial displacement acting on the tissue to a certain extent. By setting the second groove 6, the axial displacement difference between the inner diameter 12 and the outer diameter 11 of the cutting side 1 of the ultrasonic surgical knife head is reduced, making the axial displacement of the cutting side 1 more uniform, stabilizing the vibration mode, improving the tissue closure ability of the ultrasonic surgical knife, and improving the safety of the operation and the stability of blood vessel closure.

[0030] The ultrasonic surgical knife head capable of improving the uniformity of axial displacement has a first groove 5 between the back cutting side 2 and the first curved side 3, and optimizes the modal characteristics of the head by changing the mass distribution and stiffness distribution, enhancing specific modes, such as the first-order or second-order bending mode, and suppressing other modes. Ensure that the natural frequency of the head body matches the driving frequency of the ultrasonic transducer to form resonance. When the ultrasonic wave propagates in the head body, it will be reflected and interfered at the structural change (such as the groove area). The first groove 5 changes the propagation path of the ultrasonic wave inside the head body. The first groove 5 can guide the propagation of the wave to form a standing wave and generate the maximum amplitude in the working area, so that the wave energy is more concentrated in the cutting area, while reducing the energy consumption in the non-working area.

[0031] Optionally, the size relationship between the cutter head body and the second cutting groove 6 is:

[0032] Among them, D1 represents the width of the distal end of the blade body; D2 represents the width of the proximal end of the blade body; L3 represents the length of the second groove 6; H1 represents the vertical length of the second groove 6 from the distal end to the proximal end.

[0033] The width of the distal end of the cutter head body is the vertical distance between the first arc surface side 3 and the second arc surface side 4. The length of the second slot 6 is the projection of the second slot 6 in the direction of the center axis of the cutter head body. The vertical length of the second slot 6 from the distal end to the proximal end is the projection of the second slot 6 in the direction perpendicular to the center axis of the cutter head body.

[0034] By limiting the dimensional relationship between the cutter head body and the second cutting groove 6 , the shape of the cutter head body can be limited, thereby improving the uniformity of the vibration of the cutter head body.

[0035] It can be understood that a portion is cut off at the distal end of the first arc surface side 3 to obtain the first cutting plane 7, and a portion is cut off at the distal end of the second arc surface side 4 to obtain the second cutting plane 8. The thickness of the portion cut off at the distal end of the first arc surface side 3 and the thickness of the portion cut off at the distal end of the second arc surface side 4 satisfy a certain linear relationship with the length of the second groove 6. Here, the thickness of the cut portion is limited by the length of the second groove 6. Since the cut portion cannot be reflected in the structure, it is expressed by the width of the distal end of the tool head body and the width of the proximal end of the tool head body.

[0036] Optionally, the width of the blade body gradually decreases from the proximal end to the distal end. Because some cutting processing is performed at the distal end of the blade, the curved blade portion as a whole presents a state from thick to thin, which is conducive to the scalpel being able to adapt to more minimally invasive surgery scenarios.

[0037] In this embodiment, the width of the distal end of the blade body is 1 mm to 2 mm; the width of the proximal end of the blade body is 2 mm to 3 mm.

[0038] Optionally, the length of the second groove 6 is 6 mm to 7 mm, the radius of the groove ball of the second groove 6 is 0.2 mm to 0.3 mm, and the vertical length of the second groove 6 from the distal end to the proximal end is 1 mm to 2 mm. The vertical length from the distal end to the proximal end of the second groove 6 is the projection of the second groove 6 along the direction perpendicular to the central axis of the tool head body.

[0039] Optionally, the length of the first groove 5 is 11mm~13mm, and the length of the first groove 5 is the projection length of the first groove 5 in the direction of the central axis of the cutter head body; the vertical length from the distal end to the proximal end of the first groove 5 is 1mm~2mm, and the vertical length from the distal end to the proximal end of the first groove 5 is the projection of the first groove 5 along the direction perpendicular to the central axis of the cutter head body; the radius of the groove ball of the first groove 5 is 0.5mm~0.6mm. By setting the first groove 5 between the back cutting side 2 and the first arc side 3, the unstable vibration of the ultrasonic scalpel can be weakened, and the efficiency of the operation can be improved. By controlling the length of the first groove 5 and the radius of the groove ball, the size and shape of the first groove 5 can be controlled, thereby improving the vibration stability of the cutter head body.

[0040] Optionally, the blade body is further provided with a transition surface 10, which is located between the proximal end of the blade body and the second curved surface side 4. The transition surface 10 can change the sudden change between structures, make the structural change present a "gentle" shape, optimize the shape of the second curved surface side 4, reduce the problem of excessive stress at the sudden change caused by the sudden change, reduce the risk of blade breakage, and improve the safety and stability of the operation.

[0041] Optionally, the dimensional relationship between the cutting side 1 and the transition surface 10 is:

[0042] Among them, L1 represents the length of the cutting side 1; L2 represents the length of the transition surface 10. The length of the cutting side 1 is the projected length of the cutting edge in the direction of the central axis of the blade body, and the length of the transition surface 10 is the projected length of the transition surface 10 in the direction of the central axis of the blade body. By controlling the length of the cutting side 1, in conjunction with the structural design of the entire ultrasonic scalpel blade and blade body, surgical requirements can be met. The length of the transition surface 10 can also be limited. The largest stress part of the entire ultrasonic scalpel is at the connection between the blade head and the shank. An overly long transition surface 10 will reduce the diameter of the shank at the point of maximum stress, making the scalpel unable to meet the working intensity required for surgery.

[0043] In this embodiment, the length of the cutting side 1 is 9.5 mm to 12 mm, and the length of the transition surface 10 is 1 mm to 2 mm. By limiting the length of the cutting side 1 and the length of the transition surface 10, the length of the distal end of the blade body is controlled so that the cutting side 1 can meet the cutting effect required during surgery.

[0044] Optionally, the cutter head body is further provided with a first cutting plane 7 and a second cutting plane 8 , the first cutting plane 7 is arranged at the distal end of the first arc surface side 3 , and the second cutting plane 8 is arranged at the distal end of the second arc surface side 4 .

[0045] By setting the first cutting plane 7 and the second cutting plane 8, the overall thickness of the blade body from the proximal end to the distal end can be reduced, so that the blade tip 9 presents a more "slender" shape, which can make the blade suitable for more minimally invasive surgical occasions, and the wound caused during the operation is smaller. At the same time, the stress at the connection between the blade and the blade rod can be reduced, thereby extending the service life of the ultrasonic scalpel.

[0046] Optionally, the dimensional relationship between the first cutting plane 7, the second cutting plane 8 and the second cutting groove 6 is:

[0047] Among them, L5 is the length of the first cutting plane 7; L6 is the length of the second cutting plane 8. The length of the first cutting plane 7 is the projected length of the first cutting plane 7 in the direction of the central axis of the blade body; the length of the second cutting plane 8 is the projected length of the second cutting plane 8 in the direction of the central axis of the blade body. The design of the first cutting plane 7 and the second cutting plane 8 requires the parameters of these two structures to be matched. Too long or too rough cutting will destroy the stable vibration of the blade and increase the impedance of the entire ultrasonic surgical knife. The length of the first cutting plane 7 and the second cutting plane 8 is limited by the length of the second cutting groove 6.

[0048] In this embodiment, the length of the first cutting plane 7 is 3 mm to 4 mm, and the length of the second cutting plane 8 is 6 mm to 8 mm.

[0049] Optionally, the radius of curvature of the circle with the same curvature as the second slot 6 is equal to the radius of curvature of the first arc surface side 3. In this embodiment, the radius of curvature of the first arc surface side 3 is 31 mm to 33 mm. Similarly, the radius of curvature of the circle with the same curvature as the second slot 6 is also 31 mm to 33 mm.

[0050] Optionally, the length of the first arc surface side 3 is 14 mm to 16 mm, and the length of the first arc surface side 3 is the projection length of the first arc surface side 3 in the direction of the central axis of the tool head body.

[0051] Figure 6 and Figure 7 In the figure, L4 is the length of the first arc surface side; L7 is the length of the second arc surface side; and L8 is the length of the first arc surface side minus the first cutting plane.

[0052] Figure 8 It is a schematic diagram of the axial displacement of the cutting side 1 when the first cutting groove 5, the second cutting groove 6, the first cutting plane 7 and the second cutting plane 8 are provided in this embodiment.

[0053] Fig. 9 It is a schematic diagram of the axial displacement of the cutting side 1 when the first cutting groove 5, the second cutting groove 6, the first cutting plane 7 and the second cutting plane 8 are not provided in this embodiment.

[0054] according to Figure 8 and Fig. 9 It can be seen that the axial displacement of the cutting side 1 with the first cutting groove 5, the second cutting groove 6, the first cutting plane 7 and the second cutting plane 8 is highly uniform and the vibration mode is more stable.

[0055] The present invention also provides an ultrasonic surgical knife, comprising the ultrasonic surgical knife head capable of improving the uniformity of axial displacement.

[0056] Obviously, the embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. It is not necessary and impossible to exhaustively list all the embodiments here.

Claims

1. An ultrasonic surgical knife head capable of improving axial displacement uniformity, characterized in that: The invention comprises a connecting rod and a blade body extending from the proximal end to the distal end of an ultrasonic surgical knife, wherein the blade body is fixedly connected to the connecting rod, and the blade body is provided with a cutting side (1), a back cutting side (2), a first arc surface side (3), a second arc surface side (4), a first cutting groove (5) and a second cutting groove (6); the cutting side (1) is arranged opposite to the back cutting side (2), the first arc surface side (3) is arranged opposite to the second arc surface side (4), the first cutting groove (5) is arranged between the back cutting side (2) and the first arc surface side (3), and the second cutting groove (6) is arranged between the cutting side (1) and the first arc surface side (3).

2. The ultrasonic surgical blade head capable of improving axial displacement uniformity according to claim 1, characterized in that: The size relationship between the cutter head body and the second cutting groove (6) is: Wherein, D1 represents the width of the distal end of the blade body; D2 represents the width of the proximal end of the blade body; L3 represents the length of the second groove (6); and H1 represents the vertical length of the second groove (6) from the distal end to the proximal end.

3. The ultrasonic surgical blade head capable of improving axial displacement uniformity according to claim 1, characterized in that: The cutter head body is also provided with a transition surface (10), and the transition surface (10) is located between the proximal end of the cutter head body and the second arc surface side (4).

4. The ultrasonic surgical blade head capable of improving axial displacement uniformity according to claim 3, characterized in that: The dimensional relationship between the cutting side (1) and the transition surface (10) is: Wherein, L1 represents the length of the cutting side (1); and L2 represents the length of the transition surface (10).

5. The ultrasonic surgical blade head capable of improving axial displacement uniformity according to claim 1, characterized in that: The cutter head body is also provided with a first cutting plane (7) and a second cutting plane (8), wherein the first cutting plane (7) is arranged at the distal end of the first arc surface side (3), and the second cutting plane (8) is arranged at the distal end of the second arc surface side (4).

6. The ultrasonic surgical blade head capable of improving axial displacement uniformity according to claim 5, characterized in that: The dimensional relationship between the first cutting plane (7), the second cutting plane (8) and the second cutting groove (6) is: Wherein, L5 is the length of the first cutting plane (7); L6 is the length of the second cutting plane (8).

7. The ultrasonic surgical blade head capable of improving axial displacement uniformity according to claim 1, characterized in that: The radius of curvature of a circle having the same curvature degree as the second cutting groove (6) is equal to the radius of curvature of the first arc surface side (3).

8. The ultrasonic surgical blade head capable of improving axial displacement uniformity according to claim 1, characterized in that: The length of the second groove (6) is 6 mm to 7 mm, the radius of the groove ball of the second groove (6) is 0.2 mm to 0.3 mm; and the vertical length of the second groove (6) from the distal end to the proximal end is 1 mm to 2 mm.

9. The ultrasonic surgical blade head capable of improving axial displacement uniformity according to claim 1, characterized in that: The width of the cutter head body decreases gradually from the proximal end to the distal end.

10. An ultrasonic surgical knife, characterized in that: An ultrasonic surgical knife head capable of improving axial displacement uniformity as described in any one of claims 1 to 9.

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