Ultrasonic osteotome cutter, ultrasonic osteotome assembly and ultrasonic osteotome

Abstract

The utility model discloses an ultrasonic osteotome tool, an ultrasonic osteotome assembly and an ultrasonic osteotome. The cutter bar comprises a first bar part, a variable-amplitude part and a second bar part which are connected in sequence, one end of the first bar part is connected with the working head, one end of the second bar part is connected with the driving handle, and the radial sectional area of the variable-amplitude part is larger than that of the first bar part and that of the second bar part; a liquid inlet is formed in the end, away from the working head, of the cutter bar, the ultrasonic osteotome cutter is further provided with a liquid injection channel and a liquid outlet, the liquid outlet is formed in the cutter bar and / or the working head, and the liquid injection channel communicates with the liquid inlet and the liquid outlet. According to the technical scheme, the service life of the ultrasonic osteotome is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an ultrasonic bone scalpel tool, an ultrasonic bone scalpel component and an ultrasonic bone scalpel. Background Art

[0002] In orthopedic surgery, ultrasonic bone knives are often used to cut and grind bones. The ultrasonic bone knives are generally installed on a driving handle, which is equipped with a transducer. The ultrasonic bone knives are connected to the transducer, which converts electrical energy into mechanical energy, so that the ultrasonic bone knives generate high-frequency ultrasonic oscillations, thereby vaporizing water in the tissue cells in contact with the ultrasonic bone knives and breaking protein hydrogen bonds, thereby achieving the function of destroying bone tissue.

[0003] An existing ultrasonic bone cutter has a liquid injection channel disposed inside the cutter shaft, through which cooling liquid is directed to the working head of the ultrasonic bone cutter, thereby cooling the working head during surgery.

[0004] However, this type of ultrasonic bone knife has the problem of a short service life. Utility Model Content

[0005] The main purpose of the utility model is to provide an ultrasonic bone knife tool, aiming to prolong the service life of the ultrasonic bone knife tool.

[0006] To achieve the above-mentioned purpose, the ultrasonic bone scalpel tool proposed in the utility model is connected to a driving handle, and the ultrasonic bone scalpel tool comprises:

[0007] Working head; and

[0008] The tool bar comprises a first rod portion, a variable amplitude portion and a second rod portion connected in sequence, one end of the first rod portion is connected to the working head, one end of the second rod portion is connected to the driving handle, and the radial cross-sectional area of ​​the variable amplitude portion is larger than the radial cross-sectional areas of the first rod portion and the second rod portion;

[0009] A liquid inlet is provided at one end of the knife rod away from the working head, and the ultrasonic bone knife tool is also provided with an injection channel and a liquid outlet. The liquid outlet is arranged on the knife rod and / or the working head, and the injection channel connects the liquid inlet and the liquid outlet.

[0010] Optionally, the position where the amplitude changing portion is connected to the first rod portion has a smooth transition; the position where the amplitude changing portion is connected to the second rod portion has a smooth transition.

[0011] Optionally, the liquid inlet is provided at an end of the second rod portion away from the amplitude changing portion;

[0012] The liquid outlet is arranged on the outer peripheral wall of the knife rod, or the liquid outlet is arranged along the axial direction of the working head.

[0013] Optionally, the injection channel includes a first sub-channel and a second sub-channel, the first sub-channel is provided on the tool rod, one end of the first sub-channel is communicated with the liquid inlet, and the other end of the first sub-channel extends toward the direction close to the working head;

[0014] One end of the second sub-channel is connected to the first sub-channel, and the other end of the second sub-channel radially extends toward the outer peripheral wall of the tool rod to be connected to the liquid outlet; or the second sub-channel is arranged on the working head and is connected to the liquid outlet.

[0015] Optionally, the liquid outlet is arranged on the outer peripheral wall of the amplitude-changing portion, the first sub-channel extends to the amplitude-changing portion from one end of the liquid inlet, and the second sub-channel extends in the radial direction of the amplitude-changing portion.

[0016] Optionally, the first sub-channel extends along the axial direction of the knife rod; and / or,

[0017] The second sub-channel extends in a radial direction of the knife rod.

[0018] Optionally, the knife rod is provided with a plurality of the liquid outlets, and each of the liquid outlets is correspondingly provided with a second sub-channel.

[0019] Optionally, a radial cross-sectional area of ​​the first rod portion decreases from an end close to the amplitude-changing portion to an end close to the working head.

[0020] Optionally, the working head is a grinding head; or,

[0021] The working head is a cutting head.

[0022] The utility model also provides an ultrasonic bone knife assembly, comprising:

[0023] The ultrasonic osteotome tool mentioned above; and

[0024] A bone knife sheath is used for being sleeved on the outside of the ultrasonic bone knife tool.

[0025] The utility model also provides an ultrasonic bone knife, comprising:

[0026] The ultrasonic osteotome assembly mentioned above; and

[0027] A driving handle is connected to and drives the ultrasonic bone knife tool.

[0028] The ultrasonic bone scalpel tool in a technical solution of an embodiment of the utility model includes a working head and a shank, the shank includes a first rod portion, a second rod portion and an amplitude-changing portion, the working head is arranged on the first rod portion of the shank, the second rod portion of the shank is connected to a driving handle, the amplitude-changing portion is connected to the first rod portion and the second rod portion, and the driving handle drives the shank to vibrate and then drives the working head to vibrate. The mechanical energy generated by the driving handle is sequentially transmitted to the working head along the second rod portion, the amplitude-changing portion and the first rod portion. Since the radial cross-sectional area of ​​the amplitude-changing portion is greater than the radial cross-sectional area of ​​the first rod portion, and the radial cross-sectional area of ​​the amplitude-changing portion is greater than the radial cross-sectional area of ​​the second rod portion, when the driving handle drives the shank to oscillate, the amplitude-changing portion can expand the amplitude of the oscillation, reduce the attenuation of the energy transmitted from the driving handle to the working head, thereby improving the working efficiency of the working head and improving the surgical effect, and since the radial cross-sectional area at the amplitude-changing portion is large, that is, the amplitude-changing portion is thicker, the amplitude-changing portion improves the strength of the shank itself, reduces the possibility of damage to the ultrasonic bone scalpel tool during surgery, and prolongs the service life of the ultrasonic bone scalpel tool. An injection channel is provided on the ultrasonic bone knife tool. When the ultrasonic bone knife tool is used for surgery, coolant can be injected through the injection channel. The liquid outlet can be provided on the knife rod, so that after the coolant flows out from the liquid outlet, it can flow along the knife rod to the working head, thereby reducing the temperature of the surface of the working head and extending the service life of the working head. The coolant flows through the injection channel and the knife rod, which can also have a certain cooling effect on the knife rod and extend the service life of the knife rod. The liquid outlet can also be provided on the working head, and the coolant flowing out of the liquid outlet directly cools the surface of the working head, extending the service life of the working head. The liquid outlet will not damage the structure of the knife rod, reducing the possibility of the knife rod breaking. Liquid outlets can also be provided on both the knife rod and the working head to improve the heat dissipation effect of the ultrasonic bone knife tool and reduce working heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0030] Figure 1 The structure of an embodiment of the ultrasonic bone knife of the utility model is shown in FIG. Figure 1 ;

[0031] Figure 2 It is a cross-sectional view of an embodiment of an ultrasonic bone knife tool of the utility model;

[0032] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0033] Figure 4 The structure of an embodiment of the ultrasonic bone knife of the utility model is shown in FIG. Figure 2 ;

[0034] Figure 5 The structure of another embodiment of the ultrasonic bone knife of the utility model is shown as follows Figure 1 ;

[0035] Figure 6 It is a cross-sectional view of another embodiment of the ultrasonic bone knife of the utility model;

[0036] Figure 7 for Figure 6 A partial enlarged view of point B in the middle;

[0037] Figure 8 The structure of another embodiment of the ultrasonic bone knife of the utility model is shown as follows Figure 2 .

[0038] Description of Figure Numbers:

[0039] Label name Label name 100 Working head 200 Tool bar 210 First rod 220 Second rod 222 Connection structure 223 Wrench Department 230 Amplitude change part 240 Injection channel 241 First subchannel 242 Second subchannel 221 Liquid inlet 231 Liquid outlet

[0040] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0045] The utility model provides an ultrasonic bone knife tool.

[0046] Reference Figure 1 to Figure 2 , Figure 1 The structure of an embodiment of the ultrasonic bone knife of the utility model is shown in FIG. Figure 1 , Figure 2 It is a cross-sectional view of an embodiment of an ultrasonic bone knife tool of the utility model.

[0047] In an embodiment of the utility model, the ultrasonic bone knife tool is connected to a driving handle, and the ultrasonic bone knife tool comprises:

[0048] A working head 100; and

[0049] The tool bar 200 comprises a first rod portion 210, a variable amplitude portion 230 and a second rod portion 220 which are connected in sequence, one end of the first rod portion 210 is connected to the working head 100, one end of the second rod portion 220 is connected to the driving handle, one end of the variable amplitude portion 230 is connected to an end of the first rod portion 210 away from the working head 100, and the other end of the variable amplitude portion 230 is connected to an end of the second rod portion 220 away from the driving handle, and the radial cross-sectional area of ​​the variable amplitude portion 230 is greater than the radial cross-sectional area of ​​the first rod portion 210, and the radial cross-sectional area of ​​the variable amplitude portion 230 is greater than the radial cross-sectional area of ​​the second rod portion 220;

[0050] A liquid inlet 221 is provided at one end of the knife rod 200 away from the working head 100, and the ultrasonic bone knife tool is also provided with an injection channel 240 and a liquid outlet 231. The liquid outlet 231 is arranged on the knife rod 200 and / or the working head 100, and the injection channel 240 connects the liquid inlet 221 and the liquid outlet 231.

[0051] An ultrasonic bone knife tool in a technical solution of an embodiment of the utility model includes a working head 100 and a knife rod 200, the knife rod 200 includes a first rod portion 210, a second rod portion 220 and an amplitude variation portion 230, the working head 100 is arranged on the first rod portion 210 of the knife rod 200, the second rod portion 220 of the knife rod 200 is connected to a driving handle, the amplitude variation portion 230 connects the first rod portion 210 and the second rod portion 220, and the driving handle drives the knife rod 200 to vibrate and then drives the working head 100 to vibrate. The mechanical energy generated by the driving handle is transmitted to the working head 100 along the second rod portion 220, the amplitude variation portion 230, and the first rod portion 210 in sequence. Since the radial cross-sectional area of ​​the amplitude variation portion 230 is larger than the radial cross-sectional area of ​​the first rod portion 210, and the radial cross-sectional area of ​​the amplitude variation portion 230 is larger than the radial cross-sectional area of ​​the second rod portion 220, when the driving handle drives the knife rod 200 to oscillate, the amplitude variation portion 230 can enlarge the amplitude of the oscillation, and reduce the attenuation of energy transmitted from the driving handle to the working head 100, thereby improving the working efficiency of the working head 100 and improving the surgical effect. In addition, since the radial cross-sectional area of ​​the amplitude variation portion 230 is large, that is, the amplitude variation portion 230 is thicker, the amplitude variation portion 230 improves the strength of the knife rod 200 itself, reduces the possibility of damage to the ultrasonic bone knife tool during surgery, and extends the service life of the ultrasonic bone knife tool. The ultrasonic bone knife tool is provided with an injection channel 240. When the ultrasonic bone knife tool is used for surgery, coolant can be injected through the injection channel 240. The liquid outlet 231 can be provided on the knife rod 200, so that after the coolant flows out from the liquid outlet 231, it can flow along the knife rod 200 to the working head 100, thereby reducing the temperature of the surface of the working head 100 and extending the service life of the working head 100. In addition, the coolant flows through the injection channel 240 and the knife rod 200, which can also play a certain cooling effect on the knife rod 200 and extend the service life of the knife rod 200; the liquid outlet 231 can also be provided on the working head 100, and the coolant flowing out of the liquid outlet 231 directly cools the surface of the working head 100, thereby extending the service life of the working head 100. The liquid outlet 231 will not damage the structure of the knife rod 200, thereby reducing the possibility of the knife rod 200 breaking; the liquid outlet 231 can also be provided on both the knife rod 200 and the working head 100 to improve the heat dissipation effect of the ultrasonic bone knife tool and reduce working heat.

[0052] In this embodiment, the specific form of the working head 100 can be specifically designed according to the type of surgery, and can be a grinding head for grinding or a cutting head for cutting, etc.

[0053] Optionally, the position where the amplitude changing portion 230 is connected to the first rod portion 210 is smoothly transitioned; the position where the amplitude changing portion 230 is connected to the second rod portion 220 is smoothly transitioned.

[0054] In this embodiment, the position where the amplitude changing portion 230 and the first rod portion 210 are connected has a smooth transition, and the position where the amplitude changing portion 230 and the second rod portion 220 are connected has a smooth transition. The smooth transition avoids sudden diameter changes between the amplitude changing portion 230 and the first rod portion 210 and between the amplitude changing portion 230 and the second rod portion 220. On the one hand, the continuity of energy transfer is guaranteed, thereby further reducing the attenuation rate of energy transferred to the working head 100. On the other hand, the stress concentration on the tool rod 200 is reduced, thereby further reducing the possibility of the tool rod 200 breaking.

[0055] Optionally, the liquid inlet 221 is disposed at an end of the second rod portion 220 away from the amplitude changing portion 230;

[0056] The liquid outlet 231 is disposed on the outer peripheral wall of the tool rod 200 , or the liquid outlet 231 is disposed along the axial direction of the working head 100 .

[0057] In this embodiment, the liquid inlet 221 is arranged at one end of the second rod portion 220 away from the amplitude changing portion 230. When the second rod portion 220 is docked with the driving handle, the liquid inlet 221 can be conveniently connected to the coolant pipe in the driving handle, so as to facilitate the coolant to enter the ultrasonic bone knife tool. When the liquid outlet 231 is arranged on the shank 200, the liquid outlet 231 is arranged on the outer peripheral wall of the shank 200, and the coolant flows to the working head 100 along the outer peripheral wall of the shank 200. The manufacturing difficulty is low and it is easy to implement. When the liquid outlet 231 is arranged on the working head 100, the liquid outlet 231 is arranged along the axial direction of the working head 100. After the coolant leaves the liquid outlet 231, the working head 100 is directly cooled, and the cooling effect is better.

[0058] Optionally, the injection channel 240 includes a first sub-channel 241 and a second sub-channel 242, the first sub-channel 241 is provided on the tool rod 200, one end of the first sub-channel 241 is connected to the liquid inlet 221, and the other end of the first sub-channel 241 extends toward the direction close to the working head 100;

[0059] One end of the second sub-channel 242 is connected to the first sub-channel 241 , and the other end of the second sub-channel 242 extends toward the outer peripheral wall of the tool rod 200 to be connected to the liquid outlet 231 ; or the second sub-channel 242 is arranged on the working head 100 and is connected to the liquid outlet 231 .

[0060] Please combine Figure 2 and Figure 3In this embodiment, the injection channel 240 includes a first sub-channel 241 and a second sub-channel 242. The first sub-channel 241 is connected to the liquid inlet 221, and the second sub-channel 242 is connected to the liquid outlet 231. The first sub-channel 241 and the second sub-channel 242 are connected, so that the coolant can enter the first sub-channel 241 through the liquid inlet 221, then enter the second sub-channel 242 through the first sub-channel 241, and then flow out through the liquid outlet 231, and then flow to the working head 100. When the liquid outlet 231 is set on the outer peripheral wall of the tool rod 200, the second sub-channel 242 is set inside the tool rod 200, the length of the injection channel 240 is short, and the manufacturing difficulty is low. When the liquid outlet 231 is set on the working head 100, the second sub-channel 242 is set inside the working head 100, and the second sub-channel 242 will not affect the strength of the tool rod 200, reducing the possibility of the tool rod 200 breaking.

[0061] Optionally, the liquid outlet 231 is disposed on the outer peripheral wall of the amplitude varying portion 230 , the first sub-channel 241 extends from one end of the liquid inlet 221 to the amplitude varying portion 230 , and the second sub-channel 242 extends along the radial direction of the amplitude varying portion 230 .

[0062] In this embodiment, the liquid outlet 231 is arranged on the outer peripheral wall of the amplitude changing part 230, and the diameter of the amplitude changing part 230 is relatively large. The liquid outlet 231 and the second sub-channel 242 have little effect on the structure of the amplitude changing part 230, thereby reducing the damage of the liquid outlet 231 and the injection channel 240 to the strength of the knife bar 200, reducing the possibility of the knife bar 200 breaking, and extending the service life of the ultrasonic bone knife tool. The first sub-channel 241 extends to the amplitude changing part 230 at one end away from the liquid inlet 221. The first sub-channel 241 does not completely penetrate the knife bar 200. On the one hand, the processing difficulty of the first sub-channel 241 is reduced, and on the other hand, the structural strength of the knife bar 200 is ensured, the possibility of the knife bar 200 breaking is reduced, and the service life of the ultrasonic bone knife tool is extended. The second sub-channel 242 extends along the radial direction of the amplitude changing part 230, which reduces the processing difficulty of the second sub-channel 242, and also reduces the damage of the second sub-channel 242 to the strength of the knife bar 200, thereby ensuring the service life of the knife bar 200.

[0063] Optionally, the first sub-channel 241 extends along the axial direction of the knife rod 200; and / or,

[0064] The second sub-channel 242 extends in the radial direction of the knife rod 200 .

[0065] In this embodiment, the first sub-channel 241 extends along the axial direction of the knife bar 200, and the axis of the first sub-channel 241 coincides with the axis of the knife bar 200. On the one hand, the processing difficulty of the first sub-channel 241 is reduced, and on the other hand, the damage of the first sub-channel 241 to the strength of the knife bar 200 is reduced, so that the overall structural strength of the knife bar 200 is uniform. The second sub-channel 242 extends along the radial direction of the knife bar 200. On the one hand, the processing difficulty of the second sub-channel 242 is reduced, and on the other hand, the second sub-channel 242 is short, which reduces the damage of the second sub-channel 242 to the strength of the knife bar 200 and ensures the service life of the knife bar 200.

[0066] Optionally, the knife rod 200 is provided with a plurality of liquid outlets 231 , and each liquid outlet 231 is correspondingly provided with a second sub-channel 242 .

[0067] In this embodiment, a plurality of liquid outlets 231 are provided on the outer peripheral wall of the tool rod 200, and each liquid outlet 231 corresponds to a second sub-channel 242 connected to the first sub-channel 241. By providing a plurality of liquid outlets 231, the outflow of the coolant is increased, thereby improving the cooling effect on the working head 100 and preventing the working head 100 from overheating. The plurality of liquid outlets 231 can be distributed along the axial direction of the tool rod 200, or can be distributed along the circumferential direction of the tool rod 200. Specifically, in this embodiment, two liquid outlets 231 are provided on the outer peripheral wall of the tool rod 200, and the two liquid outlets 231 are provided on both sides of the first sub-channel 241. On the basis of meeting the cooling requirements of the working head 100, the damage to the strength of the tool rod 200 is reduced, and the strength of the tool rod 200 is ensured. The diameter of each second sub-channel 242 is not greater than 0.5 mm, and on the basis of meeting the requirements for the outflow of the coolant, the influence on the strength of the amplitude changing part 230 is reduced.

[0068] Optionally, the radial cross-sectional area of ​​the first rod portion 210 decreases from an end close to the amplitude-changing portion 230 to an end close to the working head 100 .

[0069] Reference Figure 2 and Figure 4 In this embodiment, the radial cross-sectional area of ​​the first rod portion 210 decreases from the end close to the amplitude changing portion 230 to the end close to the working head 100, so that the first rod portion 210 becomes thinner as it is closer to the working head 100, thereby reducing obstruction during surgery, providing the user with a good surgical field of view, facilitating user operation, and improving the safety of surgery.

[0070] Optionally, the working head 100 and the tool bar 200 are an integrated structure; and / or,

[0071] A connecting structure 222 is provided at one end of the second rod portion 220 away from the amplitude changing portion 230 , and the knife rod 200 is detachably connected to the driving handle via the connecting structure 222 .

[0072] In this embodiment, the working head 100 and the tool rod 200 are an integrated structure, which ensures the overall structural strength of the ultrasonic bone knife tool and extends the service life of the ultrasonic bone knife tool.

[0073] In this embodiment, a connection structure 222 is provided on the second rod portion 220, and the connection structure 222 can be detachably connected to the driving handle by threaded matching or clamping. Specifically, in this embodiment, an external thread is provided at one end of the second rod portion 220 away from the amplitude changing portion 230, and the external thread is matched with the driving shaft thread of the driving handle. The structure is simple, easy to manufacture, and firmly connected, so as to avoid the separation of the ultrasonic bone knife tool and the driving shaft due to high-speed oscillation. A wrench portion 223 is also provided on the second rod portion 220, and the wrench portion 223 is arranged close to the external thread on the second rod portion 220. When the ultrasonic bone knife tool is installed on the driving handle, the wrench portion 223 is clamped by a wrench, so that the ultrasonic bone knife tool is conveniently applied with force to rotate the ultrasonic bone knife, thereby facilitating the threaded matching of the ultrasonic bone knife tool and the driving shaft. The wrench portion 223 can also be matched with a torque wrench for fixed torque assembly to improve assembly accuracy.

[0074] Optionally, the working head 100 is a grinding head; or,

[0075] The working head 100 is a cutting head.

[0076] Reference Figures 1 to 4 In this embodiment, the working head 100 is a grinding head, and the grinding head can be used to perform grinding operations on bone tissue. In this embodiment, a liquid outlet 231 is provided on the outer wall of the amplitude-changing portion, and a liquid outlet is provided along the axial direction of the working head 100. The liquid injection channel extends along the axial direction of the tool rod from the liquid inlet toward the working head to communicate with the liquid outlet provided on the working head. On the one hand, the coolant flows out of the liquid outlet 231 of the amplitude-changing portion and flows to the working head along the outer wall of the first rod portion 210. On the other hand, the coolant can also flow directly to the grinding head after flowing out of the liquid outlet 231 of the working head, thereby reducing the temperature of the grinding head, reducing the heat generated by the grinding head during the grinding process, improving the grinding efficiency of the grinding head, and extending the service life of the grinding head.

[0077] Reference Figures 5 to 8 In this embodiment, the working head 100 is a cutting head, and the cutting head can be used to perform a cutting operation on bone tissue. In this embodiment, a liquid outlet 231 is provided on the outer wall of the amplitude-changing portion. When the liquid outlet 231 is provided on the cutting head, the liquid outlet 231 is provided along the axial direction of the cutting head. At this time, the liquid outlet provided on the cutting head is equivalent to a guide channel. After the coolant flows out of the liquid outlet 231 of the amplitude-changing portion, it directly flows to the cutting head through the guide channel, thereby reducing the temperature of the cutting head, reducing the heat generated by the cutting head during the cutting process, improving the cutting efficiency of the cutting head, and extending the service life of the cutting head.

[0078] The utility model also provides an ultrasonic bone knife assembly, comprising:

[0079] The ultrasonic osteotome tool mentioned above; and

[0080] A bone knife sheath is used for being sleeved on the outside of an ultrasonic bone knife tool.

[0081] The ultrasonic bone knife assembly includes a bone knife sheath and an ultrasonic bone knife tool. The specific structure of the ultrasonic bone knife tool refers to the above embodiment. Since the ultrasonic bone knife assembly adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. The bone knife sheath is adapted to the ultrasonic bone knife tool and is sleeved on the outside of the ultrasonic bone knife tool to support the ultrasonic bone knife tool and prevent the ultrasonic bone knife tool from breaking during the operation. At the same time, it isolates the ultrasonic bone knife tool from other tissues to prevent the high-speed oscillating knife rod 200 from causing damage to other tissues. In this embodiment, the ultrasonic bone knife tool and the corresponding bone knife sheath are both disposable items. The two are contained in the same packaging, which is more convenient to transfer and use and not easy to confuse.

[0082] The utility model also provides an ultrasonic bone knife, comprising:

[0083] The ultrasonic osteotome assembly mentioned above; and

[0084] A driving handle is connected to and drives the ultrasonic bone knife tool.

[0085] The ultrasonic surgical instrument includes a driving handle and an ultrasonic bone scalpel tool. The specific structure of the ultrasonic bone scalpel tool refers to the above embodiment. Since the ultrasonic bone scalpel adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. The ultrasonic bone scalpel tool and the bone scalpel sheath are both installed on the driving handle, wherein the ultrasonic bone scalpel tool is installed on the driving shaft of the driving handle, the driving shaft drives the ultrasonic bone scalpel tool to oscillate at high speed, and the bone scalpel sheath is installed on the handle body of the driving handle, fixed and motionless, isolating the high-speed oscillating ultrasonic bone scalpel tool and other tissues.

[0086] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An ultrasonic bone knife tool connected to a driving handle, characterized in that: The ultrasonic bone knife tool comprises: Working head; and The tool bar comprises a first rod portion, a variable amplitude portion and a second rod portion connected in sequence, one end of the first rod portion is connected to the working head, one end of the second rod portion is connected to the driving handle, and the radial cross-sectional area of ​​the variable amplitude portion is larger than the radial cross-sectional area of ​​the first rod portion and the radial cross-sectional area of ​​the second rod portion; A liquid inlet is provided at one end of the knife rod away from the working head, and the ultrasonic bone knife tool is also provided with an injection channel and a liquid outlet. The liquid outlet is arranged on the knife rod and / or the working head, and the injection channel connects the liquid inlet and the liquid outlet.

2. The ultrasonic osteotome tool according to claim 1, characterized in that: The position where the amplitude changing portion is connected to the first rod portion has a smooth transition; the position where the amplitude changing portion is connected to the second rod portion has a smooth transition.

3. The ultrasonic osteotome tool according to claim 1 or 2, characterized in that: The liquid inlet is arranged at one end of the second rod portion away from the amplitude changing portion; The liquid outlet is arranged on the outer peripheral wall of the knife rod, or the liquid outlet is arranged along the axial direction of the working head.

4. The ultrasonic osteotome tool according to claim 3, characterized in that: The injection channel includes a first sub-channel and a second sub-channel, the first sub-channel is provided on the tool rod, one end of the first sub-channel is communicated with the liquid inlet, and the other end of the first sub-channel extends toward the direction close to the working head; One end of the second sub-channel is connected to the first sub-channel, and the other end of the second sub-channel radially extends toward the outer peripheral wall of the tool rod to be connected to the liquid outlet; or the second sub-channel is arranged on the working head and is connected to the liquid outlet.

5. The ultrasonic osteotome tool according to claim 4, characterized in that: The liquid outlet is arranged on the outer peripheral wall of the amplitude-changing portion, the first sub-channel extends to the amplitude-changing portion at one end away from the liquid inlet, and the second sub-channel extends along the radial direction of the amplitude-changing portion.

6. The ultrasonic osteotome tool according to claim 4, characterized in that: The first sub-channel extends along the axial direction of the knife rod; and / or, The second sub-channel extends in a radial direction of the knife rod.

7. The ultrasonic osteotome tool according to claim 4, characterized in that: The knife rod is provided with a plurality of liquid outlets, and each of the liquid outlets is correspondingly provided with a second sub-channel.

8. The ultrasonic osteotome tool according to claim 1, characterized in that: The radial cross-sectional area of ​​the first rod portion decreases from an end close to the amplitude-changing portion to an end close to the working head.

9. The ultrasonic osteotome tool according to any one of claims 4 to 8, characterized in that: The working head is a grinding head; or, The working head is a cutting head.

10. An ultrasonic bone knife assembly, characterized in that: include: The ultrasonic osteotome tool according to any one of claims 1 to 9; as well as A bone knife sheath is used for being sleeved on the outside of the ultrasonic bone knife tool.

11. An ultrasonic osteotome, characterized in that: include: The ultrasonic osteotome assembly according to claim 10; as well as A driving handle is connected to and drives the ultrasonic bone knife tool.

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