Ultrasonic bone knife and knife handle thereof

Abstract

The utility model discloses an ultrasound osteotome and a knife handle thereof, the knife handle is used for connecting an osteotome knife, the osteotome knife is provided with a hole path communicated with the outside, the knife handle comprises an osteotome shell, an ultrasound generating assembly and a cooling pipe assembly, the ultrasound generating assembly is fixedly connected in an inner cavity of the osteotome shell, and the cooling pipe assembly is fixedly connected in the inner cavity of the osteotome shell. The osteotome cutter is fixedly connected to the front end of the ultrasonic generation assembly, the cooling pipe assembly comprises a capillary tube and a cooling pipe unit, the capillary tube is arranged in a center hole formed in the center of the ultrasonic generation assembly in the axial direction, the front end of the capillary tube is communicated with a hole path formed in the osteotome cutter, and the cooling pipe unit is arranged in the hole path. And the rear end of the capillary tube is connected with the cooling tube unit so as to transmit a cooling medium to the capillary tube and a hole path of the osteotome tool through the cooling tube unit. According to the utility model, the cooling medium can be released to play a cleaning role when the osteotome works, and the problems of short circuit, abnormity and the like caused by overheating of the ultrasonic generating component can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic processing, in particular to an ultrasonic bone knife handle. Background Art

[0002] Ultrasonic machining is a special machining technology that gradually breaks the surface of workpiece materials. Ultrasonic bone knife is an innovative technology in recent years. Ultrasonic bone knife uses the high-frequency vibration generated by the ultrasonic knife handle to drive the machining tool to vibrate. When in use, the tool continuously rubs the surface of the object being cut through high-frequency vibration, gradually breaking the surface of the object, and the broken material flows away through the liquid outlet of the knife handle. In addition, during the high-frequency vibration process, the high heat energy generated by friction causes the liquid on the cut surface of human tissue to vaporize rapidly, which guarantees the safety and reliability of cutting to a limited extent.

[0003] However, the tool transducer of the existing ultrasonic bone knife handle generates severe heat and has poor waterproof effect, which may cause the ultrasonic generating device to overheat and short-circuit abnormally, and eventually damage the handle.

[0004] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Utility Model Content

[0005] In order to solve the above technical problems, the utility model proposes an ultrasonic bone knife and a handle thereof, which can not only release cooling medium to play a cleaning role when the bone knife tool is working, but also avoid problems such as overheating and short circuit of ultrasonic components.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] In the first aspect, the utility model discloses a handle of an ultrasonic bone knife, which is used to connect a bone knife tool. The bone knife tool is provided with a hole connected to the outside world. The handle includes a bone knife shell, an ultrasonic generating component and a cooling tube component. The ultrasonic generating component is fixedly connected to the inner cavity of the bone knife shell, and the bone knife tool is fixedly connected to the front end of the ultrasonic generating component. The cooling tube component includes a capillary and a cooling tube unit. The capillary is arranged in a center hole axially opened in the center of the ultrasonic generating component, and the front end of the capillary is connected to the hole opened in the bone knife tool, and the rear end of the capillary is connected to the cooling tube unit to transmit cooling medium to the capillary and the hole of the bone knife tool through the cooling tube unit.

[0008] Preferably, the bone cutter housing comprises a front housing, a middle housing and a rear housing, and the front housing, the middle housing and the rear housing are sealed and connected in sequence.

[0009] Preferably, the ultrasonic generating assembly includes a variable amplitude rod, a pressure cover, an ultrasonic transducer and a fixing screw, the ultrasonic transducer is fixedly connected to the rear end of the variable amplitude rod by the fixing screw, the variable amplitude rod is provided with a flange, and the flange is fixed to the flange protruding from the inner wall of the middle section shell by the pressure cover, wherein the centers of the variable amplitude rod and the fixing screw are respectively provided with center holes axially for accommodating the capillary.

[0010] Preferably, at least one guide boss or groove is provided at the rear end face of the flange, and at least one groove or guide boss is correspondingly provided at the front end face of the flange, and the guide bosses correspond to the grooves so that each guide boss can be guided and inserted into each groove.

[0011] Preferably, a waterproof sealing ring is fixedly connected to the outer wall surface of the flange.

[0012] Preferably, the cooling tube assembly further comprises a first water-stop screw, which is fixedly connected to the front end of the capillary tube and is located between the bone cutter and the amplitude transformer.

[0013] Preferably, the cooling tube assembly further comprises a second water-stop screw, which is fixedly connected to the middle section of the capillary tube and is located between the amplitude transformer and the ultrasonic transducer.

[0014] Preferably, the cooling pipe unit includes a cooling pipe joint and a cooling duct, the cooling duct is connected to the rear end of the cooling pipe joint, the rear end of the capillary tube is connected to the front end of the cooling pipe joint, the cooling pipe joint is fixedly connected to the rear end of the middle section outer shell, and a waterproof sealing ring is provided between the cooling pipe joint and the rear end of the middle section outer shell.

[0015] Preferably, an anti-slip structure is provided on the outer wall surface of the middle section shell.

[0016] In a second aspect, the utility model discloses an ultrasonic bone knife, comprising a bone knife tool and the knife handle described in the first aspect, wherein the bone knife tool is fixedly connected to the front end of the knife handle.

[0017] Preferably, the bone knife tool is provided with a first hole and a second hole, the first hole is opened at the center of the rear end part of the bone knife tool and is arranged along the axial direction, the second hole is connected to the first hole and is perpendicular to the first hole, and the two ends of the second hole are arranged on the side of the bone knife tool to communicate with the outside world.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows: the ultrasonic bone knife and its handle disclosed by the utility model, wherein the ultrasonic generating assembly can provide ultrasonic energy to the bone knife tool so that the bone knife tool generates high-frequency vibration, and the bone knife tool achieves the purpose of quickly and effectively cutting human tissue through high-frequency vibration; wherein a central hole is opened at the center of the ultrasonic generating assembly to set a capillary, and the two ends of the capillary are respectively connected to the cooling tube unit and the hole path of the bone knife tool, so that the cooling medium can be transmitted to the hole path of the bone knife tool at the front end through the cooling duct and the capillary, and the cooling medium is released through the hole path of the bone knife tool to achieve a cleaning effect (i.e., the purpose of flushing blood or human tissue debris); at the same time, when the cooling medium passes through the ultrasonic generating assembly, it will take away the heat generated by the ultrasonic energy transmission as it circulates, thereby avoiding problems such as overheating and short circuit abnormalities of the ultrasonic generating assembly.

[0019] In a further solution, a guide boss or groove is provided at the rear end face of the flange of the amplitude transformer, and a groove or guide boss is correspondingly provided at the front end face of the flange on the inner wall of the middle section shell. On the one hand, this can play a positioning role, and on the other hand, it can also prevent the amplitude transformer from rotating even under the action of external force, thereby preventing the amplitude transformer from rotating in the axial position.

[0020] In a further scheme, a first water-stop screw is provided at the front end of the capillary, between the bone knife tool and the amplitude converter, to prevent the cooling medium flowing out of the capillary from flowing back; a second water-stop screw is provided in the middle section of the capillary, between the amplitude converter and the ultrasonic transducer, to assist in supporting the capillary and prevent the capillary from being deformed due to being too long. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an ultrasonic osteotome according to a preferred embodiment of the utility model;

[0022] Figure 2 yes Figure 1 A cross-sectional schematic diagram of an ultrasonic osteotome;

[0023] Figure 3 yes Figure 2 A partially enlarged schematic diagram of the front end of the ultrasonic osteotome;

[0024] Figure 4 yes Figure 2 A partially enlarged schematic diagram of the middle section of the ultrasonic osteotome;

[0025] Figure 5 yes Figure 1 A schematic cross-sectional view of the middle section of the ultrasonic osteotome in another direction;

[0026] Figure 6 yes Figure 2A partially enlarged schematic diagram of the rear half of the ultrasonic osteotome;

[0027] Figure 7 yes Figure 1 A schematic diagram of the structure of the middle shell of the ultrasonic osteotome;

[0028] Figure 8 yes Figure 2 A partially enlarged schematic diagram of the rear end of the ultrasonic osteotome;

[0029] Fig. 9 yes Figure 1 Schematic diagram of the enlarged structure of the rear end of the ultrasonic bone knife. DETAILED DESCRIPTION

[0030] The following is a detailed description of the implementation of the utility model. It should be emphasized that the following description is only exemplary and is not intended to limit the scope and application of the utility model.

[0031] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for both fixing and circuit / signal communication.

[0032] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0034] To facilitate the description of the positional relationship between the various structures, the "front" described in the embodiment of the utility model refers to the direction of the installation position of the bone knife tool in the integral ultrasonic bone knife, and the "back" refers to the direction opposite to the "front".

[0035] like Figure 1As shown, a preferred embodiment of the utility model discloses an ultrasonic bone knife and a handle thereof, wherein the ultrasonic bone knife includes a bone knife tool 200 and a handle 100, the bone knife tool 200 is fixedly connected to the front end of the handle 100, and a hole is opened in the bone knife tool 200.

[0036] Combination Figure 2 The knife handle 100 includes a bone knife housing 10, an ultrasonic generating assembly 20, a cooling tube assembly 30 and a power cord assembly 40. The ultrasonic generating assembly 20 is fixedly connected to the inner cavity of the bone knife housing 10, and the bone knife tool 200 is fixedly connected to the front end of the ultrasonic generating assembly 20; Figure 3 and Figure 6 The cooling tube assembly 30 includes a capillary tube 31, a cooling tube joint 32 and a cooling conduit 33. The capillary tube 31 is arranged in the center hole 25 opened along the axis of the center of the ultrasonic generating assembly, and the front end of the capillary tube 31 is connected to the hole opened in the bone cutter 200, the rear end of the capillary tube 31 is connected to the front end of the cooling tube joint 32, and the cooling conduit 33 is connected to the rear end of the cooling tube joint 32 so that the capillary tube 31 and the cooling conduit 33 are connected to each other, so that the cooling medium can be transmitted to the capillary tube 31 and the hole of the bone cutter 200 through the cooling conduit. The cooling medium can be a cooling liquid or a cooling gas.

[0037] A first hole 201 arranged in the axial direction is opened at the center of the rear end part of the bone knife tool 200, and a second hole 202 arranged in a direction perpendicular to the axial direction is opened on the bone knife tool 200. The first hole 201 and the second hole 202 are perpendicular to each other, and the first hole 201 is connected to the capillary 31 arranged in the ultrasonic generating component 20. The second hole 202 serves as a water outlet so that the cooling liquid or cooling gas can flow out through the second hole 202 to facilitate flushing of damaged tissue.

[0038] The bone knife housing 10 includes a front housing 11, a middle housing 12 and a rear housing 13, which are sealed and connected in sequence. Specifically, each housing section is fixed to form an integral bone knife housing 10 by threaded connection, wherein the connection between each housing section is provided with threads and rubber rings for fastening and waterproofing.

[0039] The ultrasonic generating assembly 20 includes a horn 21, a gland 22, an ultrasonic transducer 23 and a fixing screw 24. The ultrasonic transducer 23 is fixedly connected to the rear end of the horn 21 by the fixing screw 24. Figure 4, the horn 21 is provided with a flange 211, which is pressed on the flange 121 protruding from the inner wall of the middle shell 12 through a gland 22. Specifically, the gland 22 presses the horn 21 as a whole onto the flange 121 of the middle shell 12 through the threads on the middle shell 12; wherein the center of the horn 21 and the fixing screw 24 are respectively provided with a center hole 25 along the axial direction for accommodating the capillary 31. Further, a waterproof gasket 221 is padded between the gland 22 and the flange 121, and a waterproof sealing ring 2112 is fixedly connected to the outer wall of the flange 211 to ensure the waterproof sealing of the gland 22. Specifically, the waterproof sealing ring 2112 can be made of rubber material, and two grooves are reserved on the outer wall of the flange 211 for placing the waterproof sealing ring 2112. After the waterproof sealing ring 2112 is placed in the groove and then fixed with a small amount of glue, it can prevent sliding and dislocation during installation.

[0040] Combination Figure 5 , two guide bosses 2111 are provided at the rear end face of the flange 211, and two grooves 1211 are provided at the front end face of the flange 121, and each guide boss 2111 corresponds to each groove 1211, so that each guide boss 2111 can be guided and inserted into each groove 1211, respectively, to play a positioning role, so that when subjected to external force, the amplitude transformer 21 will not rotate, so that the bone knife tool 200 always maintains an axially determined position. In some embodiments, the number of guide bosses 2111 and grooves 1211 can also be one, or three or more. In other embodiments, two grooves can also be provided at the rear end face of the flange 211, and a guide boss can be provided at the front end face of the flange 121, which can also play the above-mentioned role.

[0041] In this embodiment, combined with Figure 4 and Figure 6The ultrasonic transducer 23 includes a rear cover plate 231, a plurality of electrode sheets 232 and a plurality of piezoelectric ceramic sheets 233. The plurality of electrode sheets 232 and the plurality of piezoelectric ceramic sheets 233 are coaxially and alternately arranged axially between the rear cover plate 231 and the amplitude transformer 21. The fixing screws 24 pass through the rear cover plate 231, the plurality of electrode sheets 232 and the plurality of piezoelectric ceramic sheets 233 and are fixedly connected to the rear end of the amplitude transformer 21 to fix the plurality of electrode sheets 232 and the plurality of piezoelectric ceramic sheets 233 to the rear end of the amplitude transformer 21. Among them, the amplitude transformer 21 adopts an integrated structure, the front end of the amplitude transformer 21 is threadedly connected to the bone knife tool 200, the ultrasonic transducer 23 is fixed to the rear end of the amplitude transformer 21 by a fixing screw 24, and the axis of the fixing screw 24 is provided with a through hole (i.e., a center hole 25) to facilitate the capillary 31 to be connected to the threaded adapter 26 at the end through the ultrasonic transducer 23 and the amplitude transformer 21, the threaded adapter 26 is fixed to the cooling pipe joint 32 by a threaded connection, and a waterproof sealing ring 321 is provided between the threaded adapter 26 and the cooling pipe joint 32; the cooling conduit 33 is connected to the other side of the cooling pipe joint 32.

[0042] Combination Figure 3 and Figure 4 The cooling tube assembly 30 also includes a first water-stop screw 34 and a second water-stop screw 35. The first water-stop screw 34 is fixedly connected to the front end of the capillary 31 and is located between the bone knife tool 200 and the amplitude transformer 21 to prevent the coolant flowing out of the capillary 31 from flowing back; the second water-stop screw 35 is fixedly connected to the middle section of the capillary 31 and is located between the amplitude transformer 21 and the ultrasonic transducer 23 to play a role in auxiliary support of the capillary 31 and prevent the capillary 31 from being deformed due to being too long.

[0043] The cooling pipe joint 32 is fixedly connected to the rear end of the middle shell 12 , and a waterproof sealing ring 321 is provided between the cooling pipe joint 21 and the threaded adapter 26 connected to the rear end of the middle shell 12 .

[0044] like Figure 7 As shown, an anti-slip structure 121 is provided on the outer wall surface of the middle shell 12, and a wiring hole 122 and a fixing hole 124 for fixing the threaded adapter 26 are provided on the rear end surface. The rear end of the middle shell 12 and the front end of the rear shell 13 are fixedly connected to each other through threads.

[0045] like Figure 8 As shown, the power cord assembly 40 includes a power output cord connector 41 and a power output cord 42. The power output cord connector 41 is connected to the rear end of the rear section housing 13. After the wire of the ultrasonic transducer 23 passes through the wiring hole 122 at the rear end surface of the middle section housing 12, it is connected to the power output cord 42 through the power output cord connector 41.

[0046] The cooling pipe assembly 30 also includes a waterproof plug (not shown), which is sealed and connected to the rear end of the rear shell 13. The cooling conduit 33 is led out from the rear end of the cooling pipe joint 32 and then passes through the waterproof plug to the outside of the bone cutter shell 10 to connect with the supply device of the cooling liquid or cooling gas. In other embodiments, a hole for passing the wire and the cooling conduit can also be opened at the rear end of the rear shell 13, and a rubber dustproof protective coil can be set on the hole.

[0047] One end of the capillary 31 in this embodiment is connected and fixed to the first water-stop screw 34, and the other end passes through the center hole 25 opened in the center of the amplitude transformer 21 and the fixing screw 24, and is connected to the front end of the threaded adapter 26 at the rear end of the middle section shell 12. The rear end of the threaded adapter 26 is threadedly connected and fixed to the front end of the cooling pipe joint 32. A waterproof sealing ring 321 is provided between the threaded adapter 26 and the cooling pipe joint 32 to prevent the coolant in the capillary 31 from being diverted. The rear end of the cooling pipe joint 32 is connected to the cooling conduit 33, so that after the coolant or cooling gas is input from the cooling conduit 33, it directly enters the capillary 31, and then enters the first hole 201 and the second hole 202 of the bone knife tool 200, so that the coolant or cooling gas can flow out through the second hole 202, which is convenient for cleaning the bone knife tool during operation, that is, flushing damaged tissue.

[0048] In the ultrasonic bone cutter of this embodiment, the coolant enters the cooling pipe joint 32 through the cooling duct 33 at the rear, and the coolant directly enters the capillary 31 through the cooling pipe joint 32. The capillary 31 passes through the fixing screw 24, the ultrasonic transducer 23, and the middle part of the horn 21 and is connected to the bone cutter 200 at the front end, avoiding the internal ultrasonic transducer 23 and the circuit part of the horn 21; in addition to using coolant, gas can also be used as a cooling method. The gas passes through the capillary 31 and the vertical holes (the first hole 201 and the second hole 202 that are perpendicular to each other) on the bone cutter 200 to reduce the temperature of the bone cutter 200 and the horn 21, so that the ultrasonic bone cutter and its handle have a longer service life.

[0049] The installation method of this embodiment adopts threaded connection, wherein the integrated amplitude transformer 21 is installed at the middle shell 12 through the pressure cover 22 and the guide fixing device (guide boss 2111 and groove 1211), and then the cooling pipe joint 32, threaded adapter 26 and capillary 31, cooling duct 33, waterproof sealing ring, etc. are fixed, and finally the front shell 11 and the rear shell 13 are respectively connected through threads. The installation and disassembly method is simple and the structure is relatively simple.

[0050] The handle 100 of the ultrasonic bone knife in this embodiment has a smooth outer surface as a whole, has anti-slip textures at the grip, and is smooth and light as a whole, which can save the user's physical energy consumption to the greatest extent during work. The front shell 11 can be reduced in size and lengthened in length according to actual conditions, which is more conducive to deep cutting inside the tissue.

[0051] The ultrasonic bone cutter and the handle of the ultrasonic bone cutter disclosed in the preferred embodiment of the utility model provide ultrasonic energy through the ultrasonic transducer 23, and the ultrasonic energy is transmitted and converted to the bone cutter 200 through the horn 21, so that the bone cutter 200 generates high-frequency vibration, and the ultrasonic energy of the ultrasonic transducer 23 is transmitted through the power output line 42; the blade teeth on the bone cutter 200 achieve the purpose of quickly and effectively cutting human tissue through high-frequency vibration; a large amount of heat, human tissue debris, blood, etc. are generated during the cutting process, and the cooling liquid or cooling gas is transmitted through the cooling duct 33, and is transmitted to the first hole 201 and the second hole 202 of the front bone cutter 200 through the capillary 31, and the cooling liquid or cooling gas is released through the second hole 202 to achieve the purpose of flushing blood or human tissue debris; and the cooling liquid or cooling gas will take away the heat generated by the energy transmission as it flows through the ultrasonic transducer 23 and the horn 21; and the front section shell 11, the middle section shell 12, and the rear section shell 13 play a role in protecting the overall internal structure, waterproofing and facilitating holding.

[0052] The ultrasonic bone knife disclosed in the utility model is mainly composed of an ultrasonic generator component, a bone knife tool, a bone knife shell, a cooling tube component and a power cord component, wherein the bone knife shell adopts a structural style with a slender front end surface and a thick rear end surface, so that the bone knife can better extend into the tissue of the human body for cutting. Compared with the traditional cooling liquid flowing out from the outside, the ultrasonic bone knife in this embodiment allows the cooling liquid to directly pass through the inside of the bone knife and flow out from the inner hole of the bone knife tool, so as to better flush the damaged tissue. At the same time, when the cooling liquid or cooling gas passes through the inside of the bone knife, it can also take away the heat of the ultrasonic transducer part, thereby overcoming the problems of the existing ultrasonic transducer part being seriously heated and having poor waterproof effect, resulting in the abnormal overheating and short circuit of the ultrasonic generator component, and the easy damage of the knife handle.

[0053] The background section of the utility model may contain background information about the problem or environment of the utility model, rather than describing the prior art by others. Therefore, the content contained in the background technology section is not an admission of the applicant to the prior art.

[0054] The above content is a further detailed description of the utility model in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, it can also make several substitutions or modifications to these described embodiments, and these substitutions or modifications should be regarded as belonging to the protection scope of the utility model. In the description of this specification, the description of the reference terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, in the absence of mutual contradiction, the technical personnel in this field can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope defined by the appended claims.

Claims

1. A handle of an ultrasonic osteotome, characterized in that: Used to connect a bone knife tool, the bone knife tool is provided with a hole connected to the outside world, the knife handle includes a bone knife shell, an ultrasonic generating component and a cooling tube component, the ultrasonic generating component is fixedly connected to the inner cavity of the bone knife shell, the bone knife tool is fixedly connected to the front end of the ultrasonic generating component, the cooling tube component includes a capillary tube and a cooling tube unit, the capillary tube is arranged in a center hole axially opened in the center of the ultrasonic generating component, and the front end of the capillary tube is mutually connected with the hole opened in the bone knife tool, and the rear end of the capillary tube is connected to the cooling tube unit to transmit cooling medium to the capillary tube and the hole of the bone knife tool through the cooling tube unit.

2. The knife handle according to claim 1, characterized in that: The bone cutter housing comprises a front housing, a middle housing and a rear housing, and the front housing, the middle housing and the rear housing are sealed and connected in sequence.

3. The knife handle according to claim 2, characterized in that: The ultrasonic generating assembly includes a variable amplitude rod, a pressure cover, an ultrasonic transducer and a fixing screw. The ultrasonic transducer is fixedly connected to the rear end of the variable amplitude rod by the fixing screw. The variable amplitude rod is provided with a flange, and the flange is fixed to the flange protruding from the inner wall of the middle section shell by the pressure cover. The centers of the variable amplitude rod and the fixing screw are respectively provided with center holes along the axial direction for accommodating the capillary.

4. The knife handle according to claim 3, characterized in that: At least one guide boss or groove is provided at the rear end face of the flange, and at least one groove or guide boss is correspondingly provided at the front end face of the flange. The guide bosses correspond to the grooves so that each guide boss can be guided and inserted into each groove.

5. The knife handle according to claim 3, characterized in that: The cooling pipe assembly also includes a first water-stopping screw, which is fixedly connected to the front end of the capillary tube and is located between the bone cutter and the amplitude transformer.

6. The knife handle according to claim 3, characterized in that: The cooling tube assembly further includes a second water-stopping screw, which is fixedly connected to the middle section of the capillary tube and is located between the horn and the ultrasonic transducer.

7. The knife handle according to claim 2, characterized in that: The cooling pipe unit includes a cooling pipe joint and a cooling conduit, the cooling conduit is connected to the rear end of the cooling pipe joint, the rear end of the capillary tube is connected to the front end of the cooling pipe joint, the cooling pipe joint is fixedly connected to the rear end of the middle section shell, and a waterproof sealing ring is provided between the cooling pipe joint and the rear end of the middle section shell.

8. The knife handle according to claim 2, characterized in that: An anti-slip structure is arranged on the outer wall surface of the middle section shell.

9. An ultrasonic osteotome, characterized in that: It comprises a bone cutter and a handle according to any one of claims 1 to 8, wherein the bone cutter is fixedly connected to the front end of the handle.

10. The ultrasonic osteotome according to claim 9, characterized in that: The bone knife tool is provided with a first hole and a second hole. The first hole is opened at the center of the rear end part of the bone knife tool and is arranged along the axial direction. The second hole is connected to the first hole and is perpendicular to the first hole. The two ends of the second hole are arranged on the side of the bone knife tool to communicate with the outside world.

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