Ultrasonic osteotome and osteotome head thereof

Abstract

The ultrasonic bone knife comprises an ultrasonic transducer and the knife head, the knife head comprises a knife handle section and a knife point section, the knife handle section is connected with the ultrasonic transducer, a fluid channel is arranged in the knife handle section, the knife point section is of a sheet-shaped structure and comprises a transition section and a cutting section, and the transition section is arranged between the knife handle section and the cutting section. The transition section is provided with a flow guide groove and a fluid hole, the flow guide groove is formed in the outer side wall of the transition section, and the fluid hole is used for connecting the fluid channel and the flow guide groove so that fluid can reach the cutting section through a fluid channel formed by the fluid channel, the fluid hole and the flow guide groove. The ultrasonic osteotome has the advantages that fluid can be well guided to the cutting section through the fluid channel, a good cooling effect on the cutting section is achieved, the influence on the strength of the knife point section is small, the service life of the knife head can be prolonged, and meanwhile the knife breaking risk is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical apparatus and instruments, especially to an ultrasonic bone cutter and a cutter head thereof. BACKGROUND

[0002] The cutter head of the existing ultrasonic bone cutter generally uses a side water outlet to cooperate with a water injection sleeve or sets a through groove at the cutter tip section to guide water flow, so as to realize cooling. If the side water outlet scheme is adopted, the water flow will impact the inner wall of the water injection sleeve after being discharged, and the kinetic energy will be lost when the water flow changes direction to flow towards the cutting section, thereby affecting the cooling effect, and the water injection sleeve will affect the doctor's field of vision. If the scheme of setting a through groove at the cutter tip section is adopted, the strength of the cutter tip section will be affected to some extent, the service life of the cutter head will be reduced, and the risk of cutter breakage will be increased. SUMMARY

[0003] Therefore, the utility model provides an ultrasonic bone cutter and a cutter head thereof.

[0004] The ultrasonic bone cutter provided by the utility model has the advantages that the fluid channel is arranged in the cutter handle section, the fluid channel is connected with the fluid hole and the flow guide groove, and the fluid channel, the fluid hole and the flow guide groove form a fluid passage for the fluid to reach the cutting section, so that the fluid can be guided to the cutting section through the flow guide groove and the fluid hole, and the fluid can be guided to the cutting section through the flow guide groove and the fluid hole, thereby achieving the effect of cooling the cutting section.

[0005] The transition section is provided with a flow guide groove and a fluid hole, the flow guide groove is arranged on the outer side wall of the transition section, and the fluid hole is used to connect the fluid channel and the flow guide groove, so that the fluid passing through the fluid channel, the fluid hole and the flow guide groove forms a fluid passage to reach the cutting section.

[0006] The cutter head provided by the utility model has the advantages that the fluid channel is arranged in the cutter handle section, the fluid channel is connected with the fluid hole and the flow guide groove, and the fluid channel, the fluid hole and the flow guide groove form a fluid passage for the fluid to reach the cutting section, so that the fluid can be guided to the cutting section through the flow guide groove and the fluid hole, and the fluid can be guided to the cutting section through the flow guide groove and the fluid hole, thereby achieving the effect of cooling the cutting section.

[0007] The transition section is provided with a flow guide groove and a fluid hole, the flow guide groove is arranged on the outer side wall of the transition section, and the fluid hole is used to connect the fluid channel and the flow guide groove, so that the fluid passing through the fluid channel, the fluid hole and the flow guide groove forms a fluid passage to reach the cutting section.

[0008] As can be seen from the above technical solutions, the ultrasonic bone scalpel proposed in the first aspect of this utility model, firstly, can effectively guide the fluid to the cutting section through the fluid pathway formed by the fluid channel, fluid hole, and guide groove, thereby achieving a better cooling effect on the cutting section. Secondly, compared with the existing method of opening a through groove in the blade tip to guide the fluid to cool the cutting section, this embodiment, by setting the guide groove on the outer wall of the transition section, has less impact on the strength of the blade tip, can extend the service life of the blade head, and reduce the risk of blade breakage. Furthermore, the blade head proposed in this embodiment does not require an additional water injection sleeve, which can avoid the problems of fluid kinetic energy loss, reduced cooling effect, and obstruction of the doctor's vision caused by using a water injection sleeve. Attached Figure Description

[0009] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0010] Figure 1 This is a three-dimensional structural diagram of the blade head proposed in one embodiment of the present invention;

[0011] Figure 2 yes Figure 1 A side view of the cutter head from a first-person perspective;

[0012] Figure 3 yes Figure 1 A side view of the cutter head from a second perspective;

[0013] Figure 4 yes Figure 3 A schematic cross-sectional view of the cutter head BB shown;

[0014] Figure 5 yes Figure 4 A magnified view of a portion of point C in the middle;

[0015] Figure 6 yes Figure 3 A schematic diagram of the cutter head from the E-direction perspective;

[0016] Figure 7 This is a cross-sectional schematic diagram of a cutting head according to another embodiment of this utility model;

[0017] Figure 8 This is a cross-sectional schematic diagram of a cutting head according to another embodiment of the present invention. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are all within the protection scope of the present utility model.

[0019] like Figure 1 and Figure 4 As shown, an embodiment of this utility model proposes an ultrasonic bone scalpel. The proposed ultrasonic bone scalpel includes an ultrasonic transducer and a blade head 100. The blade head 100 includes a handle section 10 and a tip section 20. The handle section 10 is connected to the ultrasonic transducer, and a fluid channel 11 is provided inside the handle section 10. The tip section 20 has a sheet-like structure and includes a transition section 21 and a cutting section 22. The transition section 21 is located between the handle section 10 and the cutting section 22. The transition section 21 is provided with a guide groove 211 and a fluid hole 212. The guide groove 211 is located on the outer wall of the transition section 21, and the fluid hole 212 is used to connect the fluid channel 11 and the guide groove 211, so that fluid reaches the cutting section 22 through the fluid passage formed by the fluid channel 11, the fluid hole 212, and the guide groove 211.

[0020] The "connection of the handle section 10 to the ultrasonic transducer" can be a direct connection between the handle section 10 and the ultrasonic transducer, or an indirect connection between the handle section 10 and the ultrasonic transducer. For example, in some embodiments, the ultrasonic bone scalpel also includes an amplitude transformer, and the handle section 10 is connected to the ultrasonic transducer through the amplitude transformer.

[0021] The "fluid hole 212 is used to connect the fluid channel 11 and the guide groove 211" can be directly connected to both the fluid hole 212 and the fluid channel 11 and the guide groove 211, or the fluid hole 212 can be directly connected to the fluid channel 11, while the fluid hole 212 and the guide groove 211 are spaced apart, but the connection between the two is achieved through other components.

[0022] In this embodiment of the invention, firstly, the fluid passage formed by the fluid channel 11, fluid hole 212, and guide groove 211 effectively guides the fluid to the cutting section 22, resulting in a better cooling effect on the cutting section 22. Secondly, compared to the existing method of opening a through groove in the blade tip section 20 to guide the fluid to cool the cutting section 22, this embodiment, by placing the guide groove 211 on the outer wall of the transition section 21, has less impact on the strength of the blade tip section 20, which can extend the service life of the blade head 100 and reduce the risk of blade breakage. Furthermore, the blade head 100 proposed in this embodiment does not require an additional water injection sleeve, thus avoiding the fluid kinetic energy loss, reduced cooling effect, and obstruction of the doctor's field of vision caused by using a water injection sleeve.

[0023] In some embodiments, the cutting head 100 is integrally formed. This forming method can give the cutting head 100 higher strength, thereby extending its service life and reducing the risk of breakage. Of course, the cutting head 100 can also be made in a non-integral manner. For example, in some other embodiments, the shank section 10 and the cutting tip section 20 can be separate parts, which are independently machined and then assembled together by mechanical coupling.

[0024] like Figure 2 and Figure 3 As shown, in some embodiments, the transition section 21 includes a first extension section 213 and a second extension section 214 connected to the first extension section 213. The first extension section 213 is connected to the handle section 10, and the cutting section 22 is connected to the second extension section 214. The first extension section 213 has a first side surface 2131, the second extension section 214 has a second side surface 2141, and the cutting section 22 has a first cutting side surface 221 in the thickness direction X. The first side surface 2131, the second side surface 2141, and the first cutting side surface 221 are oriented in the same direction. With the first cutting side surface 221 as a reference plane, the first side surface 2131 is not lower than the second side surface 2141, and the second side surface 2141 is higher than the first cutting side surface 221. The fluid hole 212 is recessed inward from the first side surface 2131 to connect with the fluid channel 11, and the guide groove 211 is disposed on the second side surface 2141.

[0025] The "connection of the first extension segment 213 to the handle segment 10" can be a direct connection between the first extension segment 213 and the handle segment 10, or an indirect connection between the first extension segment 213 and the handle segment 10. For example, in one embodiment, such as... Figure 2 and Figure 3 As shown, the transition section 21 also includes a variable diameter section 215, and the first extension section 213 is connected to the tool holder section 10 through the variable diameter section 215.

[0026] The “connection between the cutting segment 22 and the second extension segment 214” can be a direct connection between the cutting segment 22 and the second extension segment 214, or an indirect connection between the cutting segment 22 and the second extension segment 214, depending on the actual design requirements.

[0027] In this embodiment, by setting the first side 2131 to be no lower than the second side 2141 and the second side 2141 to be higher than the first cutting side 221, the fluid hole 212 is set on the first side 2131, and the guide groove 211 is set on the second side 2141, so that after the fluid flows from the fluid channel 11 to the fluid hole 212, it enters the guide groove 211 well under the action of gravity. The fluid in the guide groove 211 can flow well to the first cutting side 221 under the action of gravity, thereby forming a better cooling effect on the cutting section 22.

[0028] like Figure 1 and Figure 2 As shown, in some embodiments, the first side 2131 is higher than the second side 2141, and the first side 2131, the second side 2141, and the first cutting side 221 form a stepped structure from high to low. A notch G is provided on the side of the first extension 213 facing the second extension 214, and the notch G is connected to the fluid hole 212. The guide groove 211 is connected to the notch G, thereby communicating with the fluid hole 212.

[0029] like Figure 1 and Figure 2 As shown, it can be understood that since the first side 2131 is higher than the second side 2141, the flow channel 211 is connected to the lower section of the side of the fluid hole 212. When the fluid in the fluid channel 11 flows to the fluid hole 212, the liquid level of the fluid is higher than the flow channel 211. Under the action of gravity, the liquid in the fluid hole 212 will flow into the flow channel 211 through the gap G.

[0030] like Figure 2 and Figure 3 As shown, in some embodiments, the transition section 21 further includes a sub-transition section 216, which is disposed between the first extension section 213 and the second extension section 214. The sub-transition section 216 has a transition surface 2161, which extends obliquely from the first side surface 2131 toward the second side surface 2141. In this embodiment, as the fluid flows from the fluid hole 212 to the guide channel 211, the sub-transition section 216 can constrain and guide the fluid, allowing it to flow smoothly and centrally into the guide channel 211. Of course, in some embodiments, the transition section 21 may not have a sub-transition section 216, depending on the actual design requirements.

[0031] like Figure 2 and Figure 3 As shown, in some embodiments, the transition section 21 further includes a third extension section 217, which is disposed between the second extension section 214 and the cutting section 22. The third extension section 217 has a third side surface 2171, which is flush with the first cutting side surface 221. Fluid in the guide channel 211 flows through the third side surface 2171 to reach the first cutting side surface 221. It should be noted that in some other embodiments, the transition section 21 may not have a third extension section 217, and the cutting section 22 may be directly connected to the second extension section 214.

[0032] like Figure 2As shown, in some embodiments, the first extension segment 213 further has a fourth side surface 2132, the second extension segment 214 further has a fifth side surface 2142, the third extension segment 217 further has a sixth side surface 2172, and the cutting segment 22 further has a second cutting side surface 222. The fourth side surface 2132 and the first side surface 2131 are disposed opposite each other in the thickness direction X of the first extension segment 213, and are symmetrically arranged with respect to the central axis M of the handle segment 10. The fifth side surface 2142 and the second side surface 2141 are disposed opposite each other in the thickness direction X of the second extension segment 214, and are symmetrically arranged with respect to the central axis M of the handle segment 10. The sixth side surface 2172 and the third side surface 2171 are disposed opposite each other in the thickness direction X of the third extension segment 217, and are symmetrically arranged with respect to the central axis M of the handle segment 10. The second cutting side 222 and the first cutting side 221 are arranged opposite each other in the thickness direction X of the cutting section 22, and the second cutting side 222 and the first cutting side 221 are symmetrically arranged with respect to the central axis M of the tool holder section 10. In this embodiment, the tool tip section 20 is symmetrically arranged, which facilitates the processing and use of the tool head 100. Of course, in some other embodiments, the tool tip section 20 may also be asymmetrically arranged, depending on the actual design requirements.

[0033] like Figure 1 and Figure 2 As shown, in some embodiments, the cutting segment 22 has a first cutting side surface 221 in the thickness direction X, and the distance from the lowest point of the guide groove 211 to the central axis M of the tool holder segment 10 is greater than or equal to the distance from the first cutting side surface 221 to the central axis M of the tool holder segment 10. That is, the lowest point of the guide groove 211 is at the same height as the first cutting side surface 221 or the lowest point of the guide groove 211 is higher than the first cutting side surface 221. In this embodiment, the liquid in the guide groove 211 can flow smoothly to the first cutting side surface 221 with less kinetic energy loss, thereby forming a better cooling effect on the cutting segment 22.

[0034] In some embodiments, the cross-sectional profile of the guide channel 211 is rectangular, and the lowest point of the guide channel 211 is the bottom surface of the guide channel 211. Of course, the cross-sectional profile of the guide channel 211 is not limited to being rectangular. For example, in some other embodiments, the cross-section of the guide channel 211 is an arc, and the lowest point of the guide channel 211 is the lowest point of the arc.

[0035] like Figure 6As shown, in some embodiments, the projection of the guide groove 211 on the first plane at least partially overlaps with the projection of the fluid channel 11 on the first plane, and the first plane is perpendicular to the axial direction of the cutter head 100. In this embodiment, a portion of the fluid in the fluid channel 11 can directly pass through the fluid hole 212 and enter the guide groove 211 along the axial direction of the cutter head 100, thereby giving the fluid in the guide groove 211 a large flow velocity and sufficient kinetic energy to flow to the cutting section 22.

[0036] like Figure 1 and Figure 4 As shown, in some embodiments, the tool holder section 10 is a cylinder, and the fluid channel 11 is coaxially arranged with the central axis M of the tool holder section 10. It should be noted that the tool holder section 10 is not limited to being a cylinder. For example, in some other embodiments, the tool holder section 10 can also be a cuboid, a polygon, or other shapes, depending on the actual design requirements.

[0037] It should also be noted that the fluid channel 11 is not limited to being coaxial with the central axis M of the tool holder section 10. For example, in some other embodiments, the fluid channel 11 may also be eccentrically set with the central axis M of the tool holder section 10, depending on the actual design requirements.

[0038] like Figure 4 and Figure 5 As shown, in some embodiments, the fluid orifice 212 extends from the outer wall of the transition section 21 along the radial direction Y of the cutter head 100 to connect with the fluid channel 11, and the guide groove 211 extends along the axial direction Z of the cutter head 100.

[0039] It should be noted that the fluid orifice 212 is not limited to extending in the radial direction Y of the cutter head 100. For example, in some other embodiments, such as Figure 7 As shown, it is also possible for the fluid hole 212 to extend from the outer wall of the transition section 21 along the axial direction Z of the cutter head 100 to connect with the fluid channel 11.

[0040] like Figure 8 As shown, in some embodiments, the ultrasonic bone scalpel also includes a fluid guiding sleeve 200, which is sleeved on the scalpel head 100 and is used to guide the fluid coming out of the fluid hole 212 to the flow channel 211.

[0041] like Figure 8 As shown, it should be noted that in the embodiment of the ultrasonic bone scalpel with a fluid guiding sleeve 200, the fluid hole 212 and the flow channel 211 can be set at intervals, and the fluid hole 212 and the flow channel 211 can be connected through the fluid guiding sleeve 200.

[0042] like Figure 4 and Figure 5As shown, in some embodiments, the transition section 21 includes a first side 21a and a second side 21b opposite to the first side 21a in the thickness direction X. Both the first side 21a and the second side 21b of the transition section 21 are provided with fluid holes 212 and flow guide grooves 211. In this embodiment, fluid can flow from the first side 21a and the second side 21b of the transition section 21 to the two first cutting surfaces 221 in the thickness direction X of the cutting section 22, thereby creating a better cooling effect on the cutting section 22.

[0043] It should be noted that the fluid holes 212 and guide grooves 211 are not limited to being provided on both the first side 21a and the second side 21b of the transition section 21. For example, in some other embodiments, the fluid holes 212 and guide grooves 211 may be provided only on the first side 21a or only on the second side 21b of the transition section 21. The specific arrangement can be determined according to the actual design requirements.

[0044] like Figure 4 and Figure 5 As shown, it should also be noted that in the embodiment where fluid holes 212 and guide grooves 211 are provided on both the first side 21a and the second side 21b of the transition section 21, a through hole is provided on the first side 21a of the transition section 21 facing the second side 21b of the transition section 21. The portion of the through hole on the first side 21a of the transition section 21 forms the fluid hole 212 of the first side 21a of the transition section 21, and the portion of the through hole on the second side 21b of the transition section 21 forms the fluid hole 212 of the second side 21b of the transition section 21. With this embodiment, it is very convenient to process and form the fluid holes 212 on the first side 21a and the second side 21b of the transition section 21, as only the through hole needs to be processed. Of course, the forming of the fluid holes 212 on the first side 21a and the second side 21b of the transition section 21 is not limited to the above-described embodiments. For example, in some other embodiments, the fluid holes 212 on the first side 21a and the second side 21b of the transition section 21 may be staggered in the thickness direction X of the transition section 21. The specific arrangement can be determined according to the actual design requirements.

[0045] It should also be noted that in embodiments where fluid holes 212 and guide grooves 211 are provided on both the first side 21a and the second side 21b of the transition section 21, the number of fluid channels 11 can be one or two. Specifically, as shown in the example... Figure 4 As shown, when there is only one fluid channel 11, the fluid channel 11 is coaxially arranged with the central axis M of the tool holder section 10, and both fluid holes 212 are connected to the fluid channel 11. Figure 7As shown, when there are two fluid channels 11, the two fluid channels 11 are respectively set on both sides of the central axis M of the tool holder section 10, one fluid hole 212 is connected to one fluid channel 11, and the other fluid hole 212 is connected to the other fluid channel 11.

[0046] like Figures 1 to 8 As shown in the figure, an embodiment of this utility model also proposes a cutter head 100, which includes a handle section 10 and a tip section 20. The handle section 10 is connected to an ultrasonic transducer, and a fluid channel 11 is provided inside the handle section 10. The tip section 20 has a sheet-like structure and includes a transition section 21 and a cutting section 22. The transition section 21 is disposed between the handle section 10 and the cutting section 22. The transition section 21 is provided with a guide groove 211 and a fluid hole 212. The guide groove 211 is disposed on the outer wall of the transition section 21, and the fluid hole 212 is used to connect the fluid channel 11 and the guide groove 211, so that the fluid reaches the cutting section 22 through the fluid passage formed by the fluid channel 11, the fluid hole 212 and the guide groove 211.

[0047] The blade head 100 proposed in this embodiment firstly, through the fluid passage formed by the fluid channel 11, fluid hole 212, and guide groove 211, can effectively guide the fluid to the cutting section 22, thereby achieving a better cooling effect on the cutting section 22. Secondly, compared to the existing method of opening a through groove in the blade tip section 20 to guide the fluid to cool the cutting section 22, this embodiment, by placing the guide groove 211 on the outer wall of the transition section 21, has less impact on the strength of the blade tip section 20, which can extend the service life of the blade head 100 and reduce the risk of blade breakage. Furthermore, the blade head 100 proposed in this embodiment does not require an additional water injection sleeve, which can avoid the fluid kinetic energy loss, reduced cooling effect, and obstruction of the doctor's vision caused by using a water injection sleeve.

[0048] In some embodiments, the transition section 21 includes a first extension section 213 and a second extension section 214 connected to the first extension section 213. The first extension section 213 is connected to the handle section 10, and the cutting section 22 is connected to the second extension section 214. The first extension section 213 has a first side surface 2131, the second extension section 214 has a second side surface 2141, and the cutting section 22 has a first cutting side surface 221 in the thickness direction X. The first side surface 2131, the second side surface 2141, and the first cutting side surface 221 are oriented in the same direction. With the first cutting side surface 221 as a reference plane, the first side surface 2131 is not lower than the second side surface 2141, and the second side surface 2141 is higher than the first cutting side surface 221. The fluid hole 212 is recessed inward from the first side surface 2131 to connect with the fluid channel 11, and the guide groove 211 is disposed on the second side surface 2141.

[0049] In some embodiments, the cutting segment 22 has a first cutting side surface 221 in the thickness direction X, and the distance from the lowest point of the guide groove 211 to the central axis M of the handle segment 10 is greater than or equal to the distance from the first cutting side surface 221 to the central axis M of the handle segment 10.

[0050] In some embodiments, the transition section 21 includes a first side 21a and a second side 21b disposed opposite to the first side 21a in the thickness direction X. Both the first side 21a and the second side 21b of the transition section 21 are provided with fluid holes 212 and flow guide grooves 211.

[0051] Other structures, connections, extended descriptions, and beneficial effects of the cutter head 100 proposed in this embodiment can be referred to the above embodiments, and will not be repeated here.

[0052] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model.

Claims

1. An ultrasonic bone scalpel, characterized in that, The device includes an ultrasonic transducer and a cutting head. The cutting head includes a handle section and a cutting tip section. The handle section is connected to the ultrasonic transducer and has a fluid channel inside. The cutting tip section has a sheet-like structure and includes a transition section and a cutting section. The transition section is located between the handle section and the cutting section. The transition section is provided with a flow guide groove and a fluid hole. The flow guide groove is located on the outer side wall of the transition section, and the fluid hole is used to connect the fluid channel and the flow guide groove, so that the fluid reaches the cutting section through the fluid passage formed by the fluid channel, the fluid hole and the flow guide groove.

2. The ultrasonic bone scalpel as described in claim 1, characterized in that, The transition section includes a first extension section and a second extension section connected to the first extension section, the first extension section being connected to the handle section, and the cutting section being connected to the second extension section; The first extension segment has a first side surface, the second extension segment has a second side surface, and the cutting segment has a first cutting side surface in the thickness direction. The first side surface, the second side surface, and the first cutting side surface are oriented in the same direction. With the first cutting side surface as a reference plane, the first side surface is not lower than the second side surface, and the second side surface is higher than the first cutting side surface. The fluid hole is recessed inward from the first side to connect with the fluid channel, and the guide groove is disposed on the second side.

3. The ultrasonic bone scalpel as described in claim 2, characterized in that, The transition section further includes a sub-transition section disposed between the first extension section and the second extension section. The sub-transition section has a transition surface that extends obliquely from the first side side toward the second side side.

4. The ultrasonic bone scalpel as described in claim 2, characterized in that, The transition section further includes a third extension section, which is disposed between the second extension section and the cutting section. The third extension section has a third side surface, which is flush with the first cutting side surface.

5. The ultrasonic bone scalpel as described in claim 1, characterized in that, The cutting section has a first cutting side surface in the thickness direction, and the distance from the lowest point of the guide groove to the central axis of the handle section is greater than or equal to the distance from the first cutting side surface to the central axis of the handle section.

6. The ultrasonic bone scalpel according to any one of claims 1 to 5, characterized in that, The fluid orifice extends from the outer wall of the transition section along the radial direction of the cutter head to connect with the fluid channel, and the guide groove extends along the axial direction of the cutter head.

7. The ultrasonic bone scalpel as described in claim 1, characterized in that, The fluid orifice extends from the outer wall of the transition section along the axial direction of the cutter head to connect with the fluid channel, and the guide groove extends along the axial direction of the cutter head.

8. The ultrasonic bone scalpel according to any one of claims 1 to 5, characterized in that, The ultrasonic bone scalpel also includes a fluid guiding sleeve, which is fitted onto the scalpel head and is used to guide the fluid coming out of the fluid hole to the flow channel.

9. The ultrasonic bone scalpel according to any one of claims 1 to 5, characterized in that, The tool holder section is cylindrical, and the fluid channel is coaxially arranged with the central axis of the tool holder section; and / or The cutting head is integrally formed; and / or, The projection of the guide groove on the first plane at least partially overlaps with the projection of the fluid channel on the first plane, and the first plane is perpendicular to the axial direction of the cutter head.

10. The ultrasonic bone scalpel according to any one of claims 1 to 5, characterized in that, The transition section includes a first side and a second side disposed opposite to the first side in the thickness direction. Both the first side and the second side of the transition section are provided with the fluid hole and the guide groove.

11. A blade for use in an ultrasonic bone scalpel, characterized in that, The blade head includes a handle section and a tip section. The handle section is connected to an ultrasonic transducer and has a fluid channel inside. The tip section has a sheet-like structure and includes a transition section and a cutting section. The transition section is located between the handle section and the cutting section. The transition section is provided with a flow guide groove and a fluid hole. The flow guide groove is located on the outer side wall of the transition section, and the fluid hole is used to connect the fluid channel and the flow guide groove, so that the fluid reaches the cutting section through the fluid passage formed by the fluid channel, the fluid hole and the flow guide groove.

12. The cutting head as described in claim 11, characterized in that, The transition section includes a first extension section and a second extension section connected to the first extension section, the first extension section being connected to the handle section, and the cutting section being connected to the second extension section; The first extension segment has a first side surface, the second extension segment has a second side surface, and the cutting segment has a first cutting side surface in the thickness direction. The first side surface, the second side surface, and the first cutting side surface are oriented in the same direction. With the first cutting side surface as a reference plane, the first side surface is not lower than the second side surface, and the second side surface is higher than the first cutting side surface. The fluid hole is recessed inward from the first side to connect with the fluid channel, and the guide groove is disposed on the second side.

13. The cutting head as described in claim 11, characterized in that, The cutting section has a first cutting side surface in the thickness direction, and the distance from the lowest point of the guide groove to the central axis of the handle section is greater than or equal to the distance from the first cutting side surface to the central axis of the handle section.

14. The cutting head as described in any one of claims 11 to 13, characterized in that, The transition section includes a first side and a second side disposed opposite to the first side in the thickness direction. Both the first side and the second side of the transition section are provided with the fluid hole and the guide groove.

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