Phacoemulsification handpiece

Abstract

The utility model discloses a kind of phacoemulsification handles, comprising: shell, with hollow cavity;Amplitude rod, be set in the hollow cavity, and one end of the amplitude rod is from the first end of the hollow cavity and stretches out;Transducer, be set in the hollow cavity;Pre-tightening structure, be set in the hollow cavity;Wherein, the pre-tightening structure includes integrally-formed pre-tightening part and extension, the pre-tightening part is connected to the other end of the amplitude rod, and the transducer is fixed to the amplitude rod, the extension is from the second end of the hollow cavity and stretches out with the pre-tightening part one end of side, the amplitude rod has first suction passage, the extension has second suction passage, the second suction passage is communicated with the first suction passage.The ultrasonic emulsification handle of the utility model can simplify structure and improve reliability.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and in particular to an ultrasonic emulsification handpiece. Background Technology

[0002] Cataracts are a visual impairment caused by clouding of the lens inside the eye, obstructing light from entering. As the leading cause of blindness worldwide, it has an extremely high incidence rate among the elderly. The cause is the denaturation of lens proteins, causing the lens to change from transparent to cloudy, forming a cataract. Currently, the most common and effective treatment for this disease is phacoemulsification cataract extraction. This procedure uses high-frequency ultrasound energy (typically 20kHz–60kHz) from a phacoemulsification handpiece to emulsify the diseased lens nucleus. The emulsified material is then removed, and an artificial lens is implanted to complete the surgery.

[0003] In related technologies, the ultrasonic emulsification handle includes a transducer, an amplitude transformer, and a housing. The housing has a hollow cavity. The transducer and amplitude transformer are coaxially arranged and housed within the hollow cavity. One end of the amplitude transformer extends out of the hollow cavity to form an emulsification head. During operation, the emulsification head vibrates ultrasonically to achieve the emulsification function. A fastening structure is provided at one end of the amplitude transformer to fix the transducer. A pipe structure is also provided at one end of the amplitude transformer, communicating with the flow channel inside the amplitude transformer to form a channel for suction and emulsification of the tissue. Because the amplitude transformer operates in a vibrating environment, the stability and reliability of the structure connected to it are required to be high. However, since both the fastening structure and the pipe structure are located at one end of the amplitude transformer, their connection design is mutually constrained, resulting in a complex connection structure and relatively low reliability. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an ultrasonic emulsification handle that simplifies the structure and improves reliability.

[0005] According to a first aspect of the present invention, an ultrasonic emulsification handle includes:

[0006] The outer shell has a hollow cavity;

[0007] An amplitude transformer is disposed within the hollow cavity, with one end of the amplitude transformer extending from the first end of the hollow cavity;

[0008] The transducer is disposed within the hollow cavity;

[0009] A pre-tightening structure is provided inside the hollow cavity;

[0010] The pre-tightening structure includes an integrally formed pre-tightening part and an extension part. The pre-tightening part is connected to the other end of the amplitude transformer and fixes the transducer to the amplitude transformer. The end of the extension part opposite to the pre-tightening part extends from the second end of the hollow cavity. The amplitude transformer has a first suction channel, and the extension part has a second suction channel, which communicates with the first suction channel.

[0011] The ultrasonic emulsification handle according to the embodiment of this utility model has at least the following beneficial effects:

[0012] In the above embodiment, the pre-tightening part is connected to one end of the amplitude transformer and the transducer is fixed to the amplitude transformer, so that the transducer can transmit vibration to the amplitude transformer, thereby causing the end of the amplitude transformer extending out of the hollow cavity to vibrate at high frequency to achieve the emulsification function. The amplitude transformer extends from the first end of the hollow cavity, and the extension part extends from the second end of the hollow cavity away from the pre-tightening part. The amplitude transformer has a first suction channel, and the extension part has a second suction channel. The second suction channel is connected to the first suction channel, so that the emulsified tissue is extracted through the connected first and second suction channels. Since the second suction channel is integrated into the pre-tightening structure, there is no need to set up an additional pipe structure with a second suction channel, reducing the number of parts. Moreover, the one-piece pre-tightening part and extension part are not prone to connection failure and leakage under vibration environment, resulting in high reliability.

[0013] According to some embodiments of the present invention, the extension portion and the pre-tightening portion are coaxially arranged, the central axis of the second suction channel coincides with the central axis of the extension portion, the central axis of the first suction channel coincides with the central axis of the amplitude rod, and the pre-tightening portion is coaxially connected to the amplitude rod.

[0014] According to some embodiments of the present invention, the inner wall of the hollow cavity has a first mounting surface, and the amplitude transformer has a second mounting surface. The first mounting surface and the second mounting surface abut against each other along the radial direction of the amplitude transformer to divide the hollow cavity into a first chamber and a closed second chamber, and the transducer is located in the second chamber.

[0015] According to some embodiments of the present invention, the outer shell includes a housing, the hollow cavity is located inside the housing, the housing has an injection channel extending axially along the amplitude rod, one end of the injection channel is connected to the first chamber, and an outlet is defined between the inner wall of the first chamber and the outer wall of the amplitude rod.

[0016] According to some embodiments of the present invention, portions of the first mounting surface and the second mounting surface are planar.

[0017] According to some embodiments of the present invention, a first sealing ring is provided between the first mounting surface and the second mounting surface.

[0018] According to some embodiments of the present invention, a first adhesive layer is provided between the first mounting surface and the second mounting surface.

[0019] According to some embodiments of the present invention, the inner wall of the hollow cavity further has a first stepped surface, and the amplitude transformer has a second stepped surface, wherein the first stepped surface and the second stepped surface abut against each other along the axial direction of the amplitude transformer.

[0020] According to some embodiments of the present invention, the outer shell includes a housing and an end cap; the end cap is disposed at one end of the housing, and the two together enclose the hollow cavity; the end cap has a through hole, and the extension portion passes through the through hole; it also includes a second sealing ring disposed between the inner wall of the through hole and the outer wall of the end cap.

[0021] According to some embodiments of the present invention, the outer shell includes a housing and an end cap; the end cap is disposed at one end of the housing, and the two together enclose the hollow cavity; the end cap has a through hole, the extension is disposed through the through hole, and a second adhesive layer is disposed between the inner sidewall of the through hole and the outer sidewall of the end cap.

[0022] According to some embodiments of the present invention, the amplitude rod is axially oriented, and the amplitude rod includes an installation section, a first amplitude section, a second amplitude section, and a third amplitude section. The transducer is disposed in the installation section. The diameters of the first amplitude section, the second amplitude section, and the third amplitude section are different, and the diameter of the third amplitude section is smaller than the diameters of the first amplitude section and the second amplitude section.

[0023] According to some embodiments of the present invention, the radial dimension of the second amplitude segment gradually increases from the end connected to the first amplitude segment to the end connected to the third amplitude segment.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0026] Figure 1 This is a schematic diagram of the ultrasonic emulsification handle according to an embodiment of the present invention;

[0027] Figure 2 This is a first cross-sectional view of the ultrasonic emulsification handle according to an embodiment of the present invention;

[0028] Figure 3 This is a second cross-sectional view of the ultrasonic emulsification handle according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the ultrasonic emulsification handle without a shell according to an embodiment of the present invention.

[0030] Figure label:

[0031] 100, outer casing; 100a, hollow cavity; 100b, first mounting surface; 100c, first chamber; 100d, second chamber;

[0032] 110. Housing; 110a. Filling channel; 100e. Outlet; 100f. First stepped surface; 120. End cap; 130. Connection port;

[0033] 200, luffing bar; 200a, first suction channel; 200b, second mounting surface; 200c, second stepped surface; 210, first luffing section; 220, second luffing section; 230, third luffing section;

[0034] 300. Transducer;

[0035] 400, Pre-tightening structure; 410, Pre-tightening part; 420, Extension part; 420a, Second suction channel;

[0036] 500, First sealing ring; 600, Second sealing ring. Detailed Implementation

[0037] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0039] In the description of the embodiments of this application, the technical terms "first," "second," "third," etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0040] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0041] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0042] In the description of the embodiments of this application, the technical terms "top", "bottom", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0043] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0044] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0045] Please refer to Figures 1-4 This application provides an ultrasonic emulsification handle, including a housing 100, an amplitude transformer 200, a transducer 300, and a pre-tightening structure 400.

[0046] Please refer to Figure 1The outer shell 100 has a hollow cavity 100a, in which the amplitude rod 200, transducer 300 and pre-tightening structure 400 are all disposed. The transducer 300 is used to convert electrical energy into mechanical vibration. The transducer 300 is fixedly connected to the amplitude rod 200 through the pre-tightening structure 400 and is used to transmit vibration to the amplitude rod 200. The hollow cavity 100a has a first end and a second end that are axially opposite. One end of the amplitude rod 200 extends out from the first end of the hollow cavity 100a. The end of the amplitude rod 200 extending out of the hollow cavity 100a vibrates at high frequency to achieve the emulsification function.

[0047] The pre-tightening structure 400 includes an integrally formed pre-tightening part 410 and an extension part 420. The pre-tightening part 410 is connected to the other end of the amplitude rod 200 and fixes the transducer 300 to the amplitude rod 200.

[0048] One end of the extension 420, away from the pre-tightening portion 410, extends from the second end of the hollow cavity 100a. The amplitude rod 200 has a first suction channel 200a, and the extension 420 has a second suction channel 420a, which communicates with the first suction channel 200a. Thus, emulsified tissue can be drawn in through the first suction channel 200a and discharged through the second flushing channel.

[0049] In the above embodiment, the pre-tightening part 410 is connected to one end of the amplitude rod 200 and the transducer 300 is fixed to the amplitude rod 200, so that the transducer 300 can transmit vibration to the amplitude rod 200, thereby causing the end of the amplitude rod 200 extending out of the hollow cavity 100a to vibrate at high frequency to achieve the emulsification function. The amplitude rod 200 extends from the first end of the hollow cavity 100a, and the end of the extension part 420 away from the pre-tightening part 410 extends from the second end of the hollow cavity 100a. The amplitude rod 200 has a first suction channel 200a, and the extension part 420 has a second suction channel 420a. The second suction channel 420a is connected to the first suction channel 200a, so that the emulsified tissue is extracted through the connected first suction channel 200a and second suction channel 420a. Since the second suction channel 420a is integrated into the pre-tightening structure 400, there is no need to set up an additional pipe structure with the second suction channel 420a, which reduces the number of parts. Furthermore, the one-piece pre-tightening part 410 and extension part 420 are less prone to connection failure and leakage under vibration environment, resulting in high reliability.

[0050] In some embodiments, the transducer 300 is sleeved on the amplitude transformer 200, and the amplitude transformer 200 has a third stepped surface adapted to the transducer 300. The transducer 300 axially abuts against the third stepped surface, thereby achieving its own axial positioning.

[0051] The preload 410 is a sleeve structure, sleeved on one end of the amplitude rod 200 and pressed axially onto the transducer 300, thereby fixing the transducer 300 onto the amplitude rod 200. The preload 410 may be threaded to one end of the amplitude rod 200 or connected to the amplitude rod 200 in other ways.

[0052] The extension 420 is a tubular structure, with one end connected to the pre-tightening part 410. The connection between the two forms an arc transition structure to improve the reliability of the connection.

[0053] The extension 420 and the pre-tightening part 410 are coaxially arranged and coaxially connected to the amplitude rod 200. Furthermore, the central axis of the second suction channel 420a coincides with the central axis of the extension 420, and the central axis of the first suction channel 200a coincides with the central axis of the amplitude rod 200. Thus, after the pre-tightening part 410 and the amplitude rod 200 are coaxially engaged, the first suction channel 200a and the second suction channel 420a can automatically align and connect.

[0054] In some embodiments, the inner wall of the hollow cavity 100a has a first mounting surface 100b, and the amplitude rod 200 has a second mounting surface 200b. The first mounting surface 100b and the second mounting surface 200b abut against each other along the radial direction of the amplitude rod 200 to divide the hollow cavity 100a into a first chamber 100c and a closed second chamber 100d. The transducer 300 is located in the second chamber 100d.

[0055] Understandably, the first mounting surface 100b and the second mounting surface 200b are radially abutted, thereby constraining the radial relative position of the amplitude transformer 200 and the housing 100, so that they maintain their radial relative position under vibration environment, avoiding eccentricity that would affect ultrasonic vibration and emulsification. Furthermore, since the transducer 300 needs to operate energized, the first mounting surface 100b and the second mounting surface 200b abutting radially along the amplitude transformer 200 form a closed second chamber 100d. The transducer 300 is disposed within this second chamber 100d, preventing liquid contact with the transducer 300.

[0056] In some embodiments, the first mounting surface 100b and the second mounting surface 200b are transition fit or interference fit.

[0057] The inner wall of the hollow cavity 100a has a third mounting surface. Along the axial direction, the third mounting surface is spaced from the first mounting surface 100b. The pre-tightening part 410 has a fourth mounting surface. The third and fourth mounting surfaces abut against each other radially along the amplitude rod 200, thereby further constraining the radial relative position of the amplitude rod 200 and the outer casing 100, improving stability. Parts of the third and fourth mounting surfaces are relatively flat planes.

[0058] Please refer to Figure 3 In some embodiments, the outer casing 100 includes a housing 110 having an injection channel 110a extending axially along the amplitude rod 200, one end of the injection channel 110a communicating with a first chamber 100c, and an outlet 100e being defined between the inner wall of the first chamber 100c and the outer wall of the amplitude rod 200.

[0059] The injection channel 110a is designed on the housing 110, so there is no need to set up an additional pipe structure on the outside of the housing 110. On the one hand, it simplifies the structure and avoids the problem of reliability of the connection between the pipe structure and the housing 110. On the other hand, it also helps to reduce the size of the housing 110 and improve its appearance.

[0060] The housing 100 also includes a connection port 130 extending outward from the housing 110. The connection port 130 is connected to the end of the infusion channel 110a away from the first chamber 100c. The connection port 130 is integrally formed with the housing 100. The connection port 130 is used to communicate with an external infusion device. Liquid is discharged into the first chamber 100c through the connection port 130 and the infusion channel 110a, and flows out from the liquid outlet 100e.

[0061] The injection channel 110a extends along the axial direction of the amplitude transformer 200, and the extension direction of the connection port 130 is inclined to the axial direction of the amplitude transformer 200, thereby facilitating the connection of external injection equipment.

[0062] Please refer to Figure 2 In some embodiments, portions of the first mounting surface 100b and the second mounting surface 200b are planar. Thus, the planar portions of the first mounting surface 100b and the second mounting surface 200b cooperate to further constrain the circumferential position of the amplitude transformer 200 and the housing 100, thereby further improving the assembly progress and consequently enhancing stability under vibration conditions.

[0063] In some embodiments, the inner wall of the hollow cavity 100a also has a first stepped surface 100f, and the amplitude transformer 200 has a second stepped surface 200c. The first stepped surface 100f and the second stepped surface 200c abut against each other along the axial direction of the amplitude transformer 200. This defines the axial relative position of the amplitude transformer 200 and the outer shell 100, thereby enabling quick confirmation of whether the two are axially assembled, and further improving assembly accuracy and stability under vibration environment.

[0064] In some specific implementations, the first mounting surface 100b and the first stepped surface 100f together form a groove formed in the inner wall of the hollow cavity 100a. The middle part of the amplitude rod 200 forms a radially outward protrusion, the second mounting surface 200b is the outer peripheral surface of the protrusion, and the second stepped surface 200c is the end face of one axial end of the protrusion.

[0065] In some embodiments, a first sealing ring 500 is provided between the first mounting surface 100b and the second mounting surface 200b. The first sealing ring 500 is an O-ring that can improve sealing performance through its own deformation. The first mounting surface 100b or the second mounting surface 200b has a recessed ring portion, and the first sealing ring 500 is disposed on the recessed ring portion.

[0066] In some embodiments, a first adhesive layer is provided between the first mounting surface 100b and the second mounting surface 200b. The first adhesive layer is obtained by applying and curing adhesive, and the adhesive is generally a biocompatible silicone adhesive.

[0067] In some embodiments, the outer casing 100 includes a housing 110 and an end cap 120. The housing 110 has a channel, one end of which forms a gradually narrowing constriction structure. The amplitude rod 200 extends out from the constriction structure. The end cap 120 is disposed at the end of the housing 110 away from the constriction structure. The end cap 120 and the housing 110 together enclose a hollow cavity 100a.

[0068] The end cap 120 has a through hole in the middle, and the extension 420 passes through the through hole. It also includes a second sealing ring 600, which is disposed between the inner wall of the through hole and the outer wall of the end cap 120. The second sealing ring 600 is an O-ring, which can improve sealing performance through its own deformation. Its installation structure can be referred to that of the first sealing ring 500, and will not be described again here.

[0069] In some embodiments, a second adhesive layer is provided between the inner wall of the through hole and the outer wall of the end cap 120. The second adhesive layer is obtained by applying and curing adhesive, and the adhesive is generally a biocompatible silicone adhesive.

[0070] Working principle of ultrasonic emulsification handpiece: The main unit provides a certain frequency to excite the piezoelectric ceramic in the transducer 300. The piezoelectric ceramic converts electrical energy into mechanical energy. The mechanical energy and amplitude generated by the piezoelectric ceramic are amplified and transmitted by the cross-sectional change of the amplitude transformer 200 in the transducer 300, so that the extended end of the amplitude transformer 200 outputs the maximum amplitude, which breaks the human eye tissue into particles. The particles are then sucked out through the suction channel in the ultrasonic emulsification handpiece, creating favorable conditions for subsequent intraocular lens implantation.

[0071] The length of the amplitude transformer 200 is generally set to an odd multiple of a quarter wavelength. Different amplitude transformer 200 materials have different wavelengths. Usually, the principle for selecting materials at high frequencies is to choose materials with good mechanical properties, such as titanium alloys, whose crystal phase structure is uniform and dense, which facilitates the improvement of subsequent energy transfer efficiency.

[0072] Please refer to Figure 4In some embodiments, along the axial direction of the amplitude rod 200, the amplitude rod 200 includes an installation section, a first amplitude section 210, a second amplitude section 220, and a third amplitude section 230. The transducer 300 is disposed in the installation section. The diameters of the first amplitude section 210, the second amplitude section 220, and the third amplitude section 230 are different, and the diameter of the third amplitude section 230 is smaller than the diameter of the first amplitude section 210 and the diameter of the second amplitude section 220.

[0073] Understandably, the vibration of the transducer 300 is transmitted to the mounting section and then along the axial direction of the amplitude transformer 200 to the third amplitude transformer section 230. The amplitude transformer 200 is designed as a multi-stage amplitude transformer structure. By making the diameter of the third amplitude transformer section 230 smaller than the diameter of the first amplitude transformer section 210 and the second amplitude transformer section 220, the amplitude of the third amplitude transformer section 230 is increased, thereby improving the product amplitude.

[0074] In some specific embodiments, the first amplitude-changing segment 210 and the third amplitude-changing segment 230 are generally cylindrical segments. From the end connecting the first amplitude-changing segment 210 to the end connecting the third amplitude-changing segment 230, the radial dimension of the second amplitude-changing segment 220 gradually increases. The second amplitude-changing segment 220 is a truncated conical segment.

[0075] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and all should be covered within the scope of the specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of protection.

Claims

1. An ultrasonic emulsification handpiece, characterized in that, include: The outer shell has a hollow cavity; An amplitude transformer is disposed within the hollow cavity, with one end of the amplitude transformer extending from the first end of the hollow cavity; The transducer is disposed within the hollow cavity; A pre-tightening structure is provided inside the hollow cavity; The pre-tightening structure includes an integrally formed pre-tightening part and an extension part. The pre-tightening part is connected to the other end of the amplitude rod and fixes the transducer to the amplitude rod. The end of the extension part opposite to the pre-tightening part extends out from the second end of the hollow cavity. The amplitude rod has a first suction channel, and the extension part has a second suction channel, which communicates with the first suction channel.

2. The ultrasonic emulsification handle according to claim 1, characterized in that, The extension and the pre-tightening part are coaxially arranged, the central axis of the second suction channel coincides with the central axis of the extension, the central axis of the first suction channel coincides with the central axis of the amplitude rod, and the pre-tightening part is coaxially connected to the amplitude rod.

3. The ultrasonic emulsification handle according to claim 1, characterized in that, The inner wall of the hollow cavity has a first mounting surface, and the amplitude transformer has a second mounting surface. The first mounting surface and the second mounting surface abut against each other along the radial direction of the amplitude transformer to divide the hollow cavity into a first chamber and a closed second chamber. The transducer is located in the second chamber.

4. The ultrasonic emulsification handle according to claim 3, characterized in that, The outer casing includes a housing, the hollow cavity is located inside the housing, the housing has an injection channel extending axially along the amplitude rod, one end of the injection channel is connected to the first chamber, and an outlet is defined between the inner wall of the first chamber and the outer wall of the amplitude rod.

5. The ultrasonic emulsification handle according to claim 3, characterized in that, Parts of the first mounting surface and the second mounting surface are planar.

6. The ultrasonic emulsification handle according to claim 3, characterized in that, A first sealing ring is provided between the first mounting surface and the second mounting surface; And / or, A first adhesive layer is provided between the first mounting surface and the second mounting surface.

7. The ultrasonic emulsification handle according to claim 1, characterized in that, The inner wall of the hollow cavity also has a first stepped surface, and the amplitude transformer has a second stepped surface. The first stepped surface and the second stepped surface abut against each other along the axial direction of the amplitude transformer.

8. The ultrasonic emulsification handle according to claim 7, characterized in that, The outer casing includes a shell and an end cap; the end cap is disposed at one end of the shell, and the two together enclose the hollow cavity; the end cap has a through hole, and the extension passes through the through hole. It also includes a second sealing ring, which is disposed between the inner wall of the through hole and the outer wall of the end cap; And / or, A second adhesive layer is provided between the inner wall of the through hole and the outer wall of the end cap.

9. The ultrasonic emulsification handle according to claim 1, characterized in that, Along the axial direction of the luffing rod, the luffing rod includes an installation section, a first luffing section, a second luffing section, and a third luffing section. The transducer is disposed in the installation section. The diameters of the first luffing section, the second luffing section, and the third luffing section are different, and the diameter of the third luffing section is smaller than the diameters of the first luffing section and the second luffing section.

10. The ultrasonic emulsification handle according to claim 9, characterized in that, From the end connected to the first amplitude section to the end connected to the third amplitude section, the radial dimension of the second amplitude section gradually increases.

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