Ultrasonic handle, ultrasonic osteotome and ultrasonic surgical apparatus

Abstract

The application provides an ultrasonic handle, an ultrasonic bone cutter and an ultrasonic surgical device, and relates to the technical field of medical devices, wherein the ultrasonic handle comprises a shell, a transducer, a driver and a transmission assembly; the transducer is connected in the shell and is used to be connected with a cutter head to drive the cutter head to vibrate along the axial direction of the transducer relative to the shell; the driver is connected in the shell; the transmission assembly is connected between the driver and the transducer, and is used to convert the mechanical energy output by the driver into the reciprocating swing of the transducer around the axial direction. The transmission assembly can make the transducer swing around the axial direction, so that the cutter head can not only realize the forward and backward vibration along the axial direction, but also can swing around the axial direction following the transducer, which is convenient for chip removal, makes the ultrasonic output smooth, and improves the cutting efficiency.

Description

Technical Field

[0001] This disclosure relates to the field of medical device technology, and in particular to an ultrasonic handpiece, an ultrasonic bone scalpel, and an ultrasonic surgical device. Background Technology

[0002] As an ultrasonic surgical instrument, the ultrasonic bone scalpel uses high-frequency ultrasonic vibrations to cut hard bone with minimal damage to soft tissue, and is now widely used in surgical procedures. Understandably, the higher the cutting efficiency of the ultrasonic bone scalpel, the less bleeding and complications occur during surgery. Therefore, improving the cutting efficiency of the ultrasonic bone scalpel has always been a research hotspot in this field. Summary of the Invention

[0003] This disclosure provides an ultrasonic handpiece, an ultrasonic bone scalpel, and an ultrasonic surgical device to improve the cutting efficiency of the ultrasonic bone scalpel.

[0004] According to one aspect of this disclosure, an ultrasonic handpiece is provided, comprising: a housing, a transducer, a driver, and a transmission assembly; the transducer is connected inside the housing and is used to connect to a cutting head to drive the cutting head to vibrate relative to the housing along the axial direction of the transducer; the driver is connected inside the housing; the transmission assembly is connected between the driver and the transducer and is used to convert the mechanical energy output by the driver into reciprocating oscillation of the transducer about the axial direction.

[0005] In some embodiments, the transmission assembly includes a first connector having a first hinge portion, a first connecting end, and a second connecting end. The first hinge portion is hinged to the housing, the first connecting end is driven to the output end of the driver, and the second connecting end is driven to the transducer. A preset angle is formed between a first connecting line between the first connecting end and the first hinge portion and a second connecting line between the second connecting end and the first hinge portion.

[0006] In some embodiments, the first hinge portion includes a first hinge hole, the housing is provided with a first hinge shaft, and the first hinge hole is hinged to the first hinge shaft; the housing is also provided with a first fastener, the first fastener is screwed into the threaded hole of the housing, and one end of the first fastener passes through the threaded hole and abuts against the peripheral side of the first hinge shaft.

[0007] In some embodiments, the first connector includes a first strip and a second strip connected to one end of the first strip, a first hinge portion is disposed at the connection position between the first strip and the second strip, a first connecting end is located at one end of the first strip away from the first hinge portion, and a second connecting end is located at one end of the second strip away from the first hinge portion.

[0008] In some embodiments, the transmission assembly further includes a first eccentric member and a first connecting rod. The first eccentric member is connected to the output end of the driver, and the first eccentric member has a first eccentric portion at a preset distance from the output end of the driver. The first eccentric portion is hinged to a first end of the first connecting rod, and a second end of the first connecting rod is hinged to a first connecting end.

[0009] In some embodiments, the transmission assembly further includes a second connecting rod and a second eccentric member. The second eccentric member is connected to the transducer and has a second eccentric portion at a predetermined distance from the axis of the transducer. The second eccentric portion is hinged to a first end of the second connecting rod, and a second end of the second connecting rod is hinged to a second connecting end.

[0010] In some embodiments, the second eccentric member includes a body coaxially connected to the transducer and a protrusion protruding from the peripheral side of the body. The second eccentric member is located on the protrusion. A first bearing is also provided between the body and the housing. The first bearing and the protrusion are arranged along the axial direction.

[0011] In some embodiments, the maximum swing angle α of the transducer's reciprocating oscillation satisfies: 14°≤α≤23°.

[0012] In some embodiments, a seal is provided between the transducer and the housing. The seal is sleeved outside the transducer and is sealed to the outer surface of the transducer at a first end facing the transmission assembly along the axial direction. The second end of the seal is sealed to the housing along the axial direction.

[0013] In some embodiments, a sealing ring is provided over the first end of the seal, and the sealing ring presses the first end of the seal against the outer surface of the transducer.

[0014] In some embodiments, a cavity is provided between the seal and the outer surface of the transducer, and a second end of the seal has a boss protruding toward the outer surface of the transducer. The housing is also provided with a second connector, at least a portion of which abuts against the inner side of the boss toward the cavity to press the boss against a portion of the housing outside the boss.

[0015] In some embodiments, the second connector includes a cylindrical body extending along the axial direction and a clamping part connected to one end of the cylindrical body. The cylindrical body is sleeved outside the transducer and is located between the boss and the transducer. The clamping part abuts against the inner side of the boss. The other end of the cylindrical body away from the clamping part protrudes out of the outer shell. A second fastener is also provided on the outer side of the outer shell away from the boss. The second fastener is screwed to the other end of the cylindrical body to clamp the boss and part of the outer shell between the second fastener and the clamping part.

[0016] In some embodiments, a heat exchange pipe is also provided on the housing, the transducer has a conveying section extending along the axial direction, the heat exchange pipe and the conveying section are connected by a flexible pipe, the flexible pipe has a first opening and a second opening disposed opposite to each other, the first end of the heat exchange pipe located inside the housing passes through the first opening, and the first end of the heat exchange pipe is sealed to the inner wall of the flexible pipe; the first end of the conveying section passes through the second opening, and the first end of the conveying section is sealed to the inner wall of the flexible pipe.

[0017] In some embodiments, the first end of the conveying section has a fitting portion, the first end of the heat exchange pipeline has a mating portion, the fitting portion is fitted outside the mating portion, and there is a gap between the inner surface of the fitting portion and the outer surface of the mating portion; or, the first end of the conveying section has a mating portion, the first end of the heat exchange pipeline has a fitting portion, the fitting portion is fitted outside the mating portion, and there is a gap between the inner surface of the fitting portion and the outer surface of the mating portion.

[0018] In some embodiments, the gap D satisfies: D < 0.5 mm.

[0019] In some embodiments, the outer surface of the heat exchange pipeline is provided with a protrusion and a threaded section located on the side of the protrusion away from the conveying section, and a third fastener is provided on the outer shell, the third fastener being screwed into the threaded section to press part of the outer shell between the protrusion and the third fastener.

[0020] Another aspect of this application provides an ultrasonic bone scalpel, including: a blade head and an ultrasonic handle as described in any of the above embodiments, the blade head passing through the housing of the ultrasonic handle, and the blade head being connected to the transducer of the ultrasonic handle.

[0021] Another aspect of this application provides an ultrasonic surgical device, including an ultrasonic bone scalpel as described in any of the above embodiments.

[0022] According to one or more embodiments of this disclosure, the transmission assembly enables the transducer to oscillate about the axial direction, thereby enabling the cutter head to not only vibrate back and forth along the axial direction, but also to oscillate with the transducer about the axial direction, which facilitates chip removal, makes the ultrasonic output smooth, and improves cutting efficiency.

[0023] These and other aspects of this disclosure will be apparent from the embodiments described below, and will be elucidated with reference to the embodiments described below. Attached Figure Description

[0024] Further details, features, and advantages of this disclosure are disclosed in the following description of exemplary embodiments in conjunction with the accompanying drawings, in which: Figure 1 This is a schematic diagram of the internal structure of an ultrasonic handpiece provided in some embodiments of this disclosure; Figure 2 yes Figure 1 A schematic diagram of the transducer, driver, and transmission components; Figure 3 yes Figure 1 Another structural schematic diagram of the transducer, driver, and transmission components; Figure 4 yes Figure 1 Schematic diagram of the middle transmission assembly; Figure 5 yes Figure 4 A schematic diagram showing the dimensions of each component. Figure 6 for Figure 4 A schematic diagram of the structure of the first connecting component; Figure 7 yes Figure 1 Installation diagram of the central sealing component; Figure 8 yes Figure 1 Schematic diagram of the installation of heat exchange pipelines and transducers.

[0025] Explanation of reference numerals in the attached figures: The outer casing 100, the first hinge shaft 110, the first fastener 120, the second connector 130, the cylindrical body 131, the pressing part 132, the second fastener 140, the third fastener 150, and the threaded hole 160. Transducer 200, conveying unit 210, transducer body 220; Drive 300; Transmission assembly 400, first connector 410, first hinge part 411, first hinge hole 4111, first connecting end 412, second connecting end 413, first strip 414, second strip 415, first eccentric member 420, first eccentric part 421, first connecting rod 430, second connecting rod 440, second eccentric member 450, second eccentric part 451, body 452, protrusion 453, first bearing 460; Seal 510, cavity 511, boss 512, sealing ring 520, heat exchange pipeline 530, protrusion 531, threaded section 532, flexible pipeline 540, first opening 541, second opening 542, fitting part 550, mating part 560, gap 570, sealing ring 580. Detailed Implementation

[0026] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this disclosure. Therefore, the drawings and description are to be considered exemplary in nature and not restrictive.

[0027] With the development of ultrasound technology and its integration with the medical field, ultrasonic bone scalpels are widely used in various surgical procedures. In these techniques, the ultrasonic bone scalpel vibrates back and forth along its longitudinal axis, i.e., the axial direction of the blade. However, as the cutting depth increases, the cutting speed slows down, chip removal becomes difficult, and the ultrasonic output can be disrupted during cutting, thus affecting cutting efficiency. This is particularly noticeable in drilling procedures, where the reduction in cutting efficiency is more pronounced when the drilling reaches a certain depth.

[0028] To address at least one of the aforementioned problems, this application provides an ultrasonic handpiece, an ultrasonic bone scalpel, and an ultrasonic surgical device. The ultrasonic handpiece includes a housing, a transducer, a driver, and a transmission assembly. The transducer is connected within the housing and is used to connect to the blade head, driving the blade head to vibrate relative to the housing along the transducer's axial direction. The driver is connected within the housing. The transmission assembly is connected between the driver and the transducer, converting the mechanical energy output by the driver into reciprocating oscillation of the transducer around its axial direction. The transmission assembly enables the transducer to oscillate around its axial direction, allowing the blade head to not only vibrate back and forth along its axial direction but also oscillate with the transducer around its axial direction, facilitating chip removal, ensuring smooth ultrasonic output, and improving cutting efficiency.

[0029] The following is a detailed explanation in conjunction with the accompanying drawings.

[0030] Figure 1 This is a schematic diagram of the internal structure of an ultrasonic handpiece provided in some embodiments of this disclosure; Figure 2 yes Figure 1 A schematic diagram of the transducer, driver, and transmission components; Figure 3 yes Figure 1 Another structural schematic diagram of the transducer, driver, and transmission components; Figure 4 yes Figure 1 Schematic diagram of the middle transmission assembly; Figure 5 yes Figure 4 A dimensional diagram showing the relationships between the various components. Please refer to it. Figures 1 to 5 This application provides an ultrasonic handpiece, including: a housing 100, a transducer 200, a driver 300, and a transmission assembly 400. The transducer 200 is connected inside the housing 100 and is used to connect to a cutting head to drive the cutting head to vibrate relative to the housing 100 along the axial direction X of the transducer 200; the driver 300 is connected inside the housing 100; the transmission assembly 400 is connected between the driver 300 and the transducer 200, and is used to convert the mechanical energy output by the driver 300 into reciprocating oscillation of the transducer 200 around the axial direction X.

[0031] The housing 100 can be made of one or more materials such as metal, plastic, and rubber. The housing 100 may have a receiving cavity in which the driver 300, transmission assembly 400, and transducer 200 can be housed. The housing may also have a grip for easy handling by the operator.

[0032] The transducer 200 is located inside the housing. The transducer 200 can be a component capable of converting electrical energy into mechanical energy. It may include a piezoelectric ceramic and an amplitude transformer. The piezoelectric ceramic can receive high-frequency electrical signals and utilize the electrostriction effect of the material to convert electrical energy into weak mechanical vibrations. The amplitude transformer amplifies the vibration amplitude, thereby providing the energy required to cut bone.

[0033] A cutter head (not shown) can be connected to one end of the housing and connected to the transducer 200 inside the housing. The cutter head can extend along the axial direction X, so that the cutter head can vibrate back and forth along the axial direction X under the drive of the transducer. Figure 1 In this embodiment, the blade head can be located at the right end of the outer casing and connected to the right end of the transducer. The blade head can be a commonly used ultrasonic bone scalpel blade structure, and its shape can vary.

[0034] The driver 300 can be a common drive structure, such as a motor. The driver 300 can convert electrical energy into mechanical motion at its output, such as rotation or linear motion.

[0035] The transmission assembly 400 is connected between the driver 300 and the transducer 200. It can transmit the mechanical energy output from the output terminal of the driver 300 to the transducer 200, so that the transducer 200 can oscillate back and forth about the axis X. The specific oscillation direction can be as follows: Figure 1 or Figure 4 The swing direction Y is shown. It can be understood that reciprocating swing means that the transducer 200 can rotate back and forth within a certain range. Taking the maximum swing angle of 17° as an example, the transducer can drive the cutter head to rotate 17° clockwise from the 0° position, and then rotate back to the 0° position counterclockwise, and repeat the cycle.

[0036] The transmission component 400 can have various structures, such as a linkage mechanism consisting of multiple links, or a transmission mechanism such as a gear and rack.

[0037] It is understandable that, under the action of the transducer 200 itself, the cutter head can vibrate back and forth along the axial direction X. Furthermore, under the action of the driver 300 and the transmission assembly 400, the transducer 200 can also oscillate back and forth around the axial direction X, which in turn drives the cutter head fixed to the transducer 200 to oscillate back and forth around the axial direction X. Based on this, when cutting bone, the cutter head can both vibrate back and forth and oscillate back and forth; the combination of these two movements achieves efficient and rapid cutting.

[0038] In some embodiments, to facilitate the swinging of the transducer, one or more bearings may be provided between the transducer 200 and the inner surface of the housing 100. The multiple bearings may be arranged along the axial direction X, so that the transducer can swing back and forth stably relative to the housing and reduce wear from the movement.

[0039] This embodiment utilizes a transmission component to allow the transducer to oscillate around its axis. This enables the cutter head to not only vibrate back and forth along the axis but also reciprocate around the axis following the transducer's movement. This oscillation generates a lateral shearing force, which helps to separate or crush bone fragments. It also creates a tiny gap between the cutter head and the bone, increasing chip removal during cutting and improving chip removal efficiency. This results in smooth ultrasonic output and increased cutting efficiency. Furthermore, the combined motion of the cutter head's back-and-forth vibration and reciprocating oscillation further enhances cutting efficiency.

[0040] Figure 6 for Figure 4 A schematic diagram of the structure of the first connecting member; please refer to... Figures 1 to 6 In some embodiments, the transmission assembly 400 may include a first connector 410, which has a first hinge portion 411, a first connecting end 412, and a second connecting end 413. The first hinge portion 411 is hinged to the housing 100, the first connecting end 412 is drivenly connected to the output end of the driver 300, and the second connecting end 413 is drivenly connected to the transducer 200. The first connecting line B1 between the first connecting end 412 and the first hinge portion 411 and the second connecting line B2 between the second connecting end 413 and the first hinge portion 411 form a preset angle A.

[0041] The first connecting member 410 can be a block-shaped or plate-shaped structure, etc., and may have a first hinge portion 411. The first hinge portion 411 can be a hinge shaft or a hinge hole, etc., and can be hinged to the outer shell 100 so that the first hinge portion can be rotatably connected to the outer shell. It can be understood that the first hinge portion 411 can be directly hinged to the outer shell 100, or the outer shell 100 can be fixedly connected to a connecting body, and the first hinge portion 411 can be directly hinged to the connecting body, so that the first hinge portion 411 is indirectly hinged to the outer shell 100.

[0042] The first connector 410 may also be provided with a first connecting end 412 and a second connecting end 413. The first connecting end 412 can be drivenly connected to the output end of the driver 300. The second connecting end 413 can be drivenly connected to the transducer.

[0043] It is understood that the first connection end 412 can be directly connected to the output end of the driver 300, or the first connection end 412 can be connected to the output end of the driver 300 through other transmission components, such as connecting rods, cams, and other components. Similarly, the second connection end 413 can be directly connected to the transducer, or the second connection end 413 can be connected to the transducer through other transmission components, such as connecting rods, cams, and other components.

[0044] Reference Figure 6 A first connecting line B1 may be provided between the first connecting end 412 and the first hinge portion 411. The first connecting line B1 may pass through the rotation center of the first hinge portion 411 and the center of the first connecting end 412. A second connecting line B2 may be provided between the second connecting end 413 and the first hinge portion 411. The second connecting line B2 may pass through the rotation center of the first hinge portion 411 and the center of the second connecting end 413. In this embodiment, the first connecting line B1 and the second connecting line B2 form a preset angle A. It can be understood that the preset angle can be greater than 0° and less than 180°, thereby reducing the maximum outer contour size of the first connector and allowing the shape of the first connector to fit as closely as possible to the inner surface of the outer shell, which is beneficial for making reasonable use of the space inside the outer shell.

[0045] In this embodiment, the transducer and the blade head can be oscillated through the first connector 410, and since the first connector 410 is hinged to the housing 100, the stability of the transmission assembly can be improved.

[0046] In some embodiments, the transducer includes a transducer body 220 and a conveying section 210 connected to the transducer body. The transducer body 220 may include piezoelectric ceramics and an amplitude transformer, which are the main components for energy conversion. A first end of the transducer body 220 along the axial direction X may be connected to a cutter head, and the conveying section 210 may be connected to a second end of the transducer body opposite to the cutter head. A transmission assembly 400 may be connected to the conveying section 210, such that the driver 300 and the transmission assembly 400 may be located on the side of the transducer body opposite to the cutter head.

[0047] In this embodiment, the second connection end 413 can be connected to the conveying part of the transducer. Since the diameter of the conveying part 210 is usually small, the space between it and the housing can be used to set up the transmission component, thereby improving the space utilization of the housing.

[0048] In some embodiments, the first hinge portion 411 includes a first hinge hole 4111, the housing 100 is provided with a first hinge shaft 110, and the first hinge hole 4111 is hinged to the first hinge shaft 110; the housing 100 is also provided with a first fastener 120, the first fastener 120 is screwed into the threaded hole 160 of the housing, and one end of the first fastener 120 passes through the threaded hole 160 and abuts against the peripheral side surface of the first hinge shaft 110.

[0049] like Figures 1 to 2 The outer casing 100 may be provided with a threaded hole 160. It can be understood that the threaded hole 160 is provided on the outer casing 100, or the outer casing 100 may extend inwards with an extension portion, on which the threaded hole 160 may be provided. In this embodiment, the threaded hole is a structure that remains relatively fixed to the outer casing, and its arrangement can be varied.

[0050] The first hinge portion 411 may include a first hinge hole 4111 disposed in the first connector. The first hinge shaft 110 may pass through the first hinge hole 4111, and the two may rotate relative to each other, thereby realizing the hinge. The first hinge shaft 110 may be fixed inside the housing 100. For example, the first hinge shaft 110 may be integrally formed with the housing, or the first hinge shaft may be a fixing screw structure that can be screwed to the housing.

[0051] Alternatively, the threaded hole 160 can be a through hole, and the axis of the threaded hole can point towards the circumferential surface of the first hinge shaft 110, so that the first fastener installed inside the threaded hole 160 can pass through the threaded hole 160 and then abut against the circumferential surface of the first hinge shaft. It can be understood that the first fastener can be a screw, the axis of which can be perpendicular to the axis of the first hinge shaft, and the tail of the screw can pass through the threaded hole 160 and be pressed against the circumferential surface of the first hinge shaft.

[0052] Since the first hinge shaft is hinged to the first hinge hole, after long-term use, the first hinge shaft is prone to loosening due to the rotation of the first connector. In this embodiment, the first fastener can press the circumferential side of the first hinge shaft, thereby improving the problem of the first hinge shaft loosening and rotating relative to the outer shell after long-term use and improving the reliability of the transmission.

[0053] In some embodiments, the first hinge shaft and the first hinge hole can be connected by a structure such as a bushing or a bearing, thereby reducing the frictional force of the hinge.

[0054] In some embodiments, continue to refer to Figure 6The first connector 410 includes a first strip 414 and a second strip 415 connected to one end of the first strip 414. A first hinge portion 411 is disposed at the connection position between the first strip 414 and the second strip 415. A first connecting end 412 is located at one end of the first strip 414 away from the first hinge portion 411, and a second connecting end 413 is located at one end of the second strip 415 away from the first hinge portion 411.

[0055] In this embodiment, the first connector 410 can be generally in the shape of a "V" plate, and it can include a first strip 414 extending along the direction of the first connecting line B1 and a second strip 415 extending along the direction of the second connecting line B2. The first strip 414 and the second strip 415 can each be in the shape of a plate.

[0056] One end of the first strip can be connected to one end of the second strip, and a first hinge portion 411 can be provided at the connection point. The other end of the first strip 414 away from the connection point can have a first connecting end 412, and the other end of the second strip 415 away from the connection point can have a second connecting end 413.

[0057] In this embodiment, by providing the first strip and the second strip, the volume and weight of the first connector can be reduced, thereby reducing the weight and volume of the ultrasonic handle. Furthermore, it reduces the space occupied within the housing, providing clearance for the delivery unit and improving the rationality of the ultrasonic handle layout.

[0058] In some embodiments, the transmission assembly 400 further includes a first eccentric member 420 and a first connecting rod 430. The first eccentric member 420 is connected to the output end of the driver 300, and the first eccentric member 420 has a first eccentric portion 421 at a preset distance D7 from the output end of the driver 300. The first eccentric portion 421 is hinged to the first end of the first connecting rod 430, and the second end of the first connecting rod 430 is hinged to the first connecting end 412.

[0059] In this embodiment, the output end of the driver can be sequentially connected to the first eccentric member 420 and the first connecting rod 430 to achieve a transmission connection.

[0060] The first eccentric component 420 can be a component with an eccentric structure, such as an eccentric wheel or an eccentric shaft, and its cross-sectional shape can be elliptical or circular, etc. The first eccentric component 420 can be fixedly connected to the output end of the driver; for ease of explanation, this connection position is simply referred to as the first connection position. The first eccentric component 420 is provided with a first eccentric portion 421, which is offset from the first connection position, and the two can have a preset distance D7 (in conjunction with...) Figure 4 and Figure 5 ).

[0061] The first eccentric portion 421 can be hinged to the first end of the first connecting rod 430. For example, the first eccentric portion 421 can protrude from the first eccentric member in a direction parallel to the axial direction X and form a hinge shaft. The first end of the first connecting rod 430 can form a hinge hole that is hinged to the hinge shaft. Of course, the first eccentric portion 421 can also be a hinge hole provided in the first eccentric member, and the first end of the first connecting rod 430 can form a hinge shaft that is hinged to the hinge hole. In some embodiments, the hinge shaft and the hinge hole can also be connected by a structure such as a bushing or bearing to reduce transmission friction.

[0062] The second end of the first connecting rod 430 can be hinged to the first connecting end 412 of the first connecting member. There are also various specific hinge methods. For reference, please refer to the hinge connection between the first eccentric part 421 and the first connecting rod. It will not be described in detail here.

[0063] It is understood that the first eccentric member 420 can be a circular wheel, which can be coaxially connected to the output end of the driver. The first eccentric part 421 can be located at a certain position between the center of the first eccentric member 420 and the wheel surface of the first eccentric member, thereby forming an eccentric structure.

[0064] The first link 430 can be a rod-shaped or strip-shaped structure, which can extend in a straight line or in a broken line, etc., and can be set according to the actual situation.

[0065] In this embodiment, the rotational motion output by the driver can be transmitted to the first connecting member through the first eccentric member 420 and the first connecting rod, which can provide as much clearance space as possible for the conveying part, and the structure is simple and easy to process and manufacture.

[0066] In some embodiments, the transmission assembly 400 further includes a second connecting rod 440 and a second eccentric member 450. The second eccentric member 450 is connected to the transducer 200, and the second eccentric member 450 has a second eccentric portion 451 at a predetermined distance D6 from the axis of the transducer 200. The second eccentric portion 451 is hinged to the first end of the second connecting rod 440, and the second end of the second connecting rod 440 is hinged to the second connecting end 413.

[0067] In this embodiment, the first connector and the transducer can be connected in sequence to the second connecting rod 440 and the second eccentric member 450, thereby realizing the transmission connection.

[0068] The second eccentric component 450 can be a component with an eccentric structure, such as an eccentric wheel or eccentric shaft, and its cross-sectional shape can be elliptical or circular, etc. The second eccentric component 450 can be fixedly connected to the conveying part of the transducer; for ease of explanation, this connection position is simply referred to as the second connection position. The second eccentric component 450 is provided with a second eccentric portion 451, which is offset from the second connection position, and the two can have a preset dimension D6 (combined) between them. Figure 4 and Figure 5 ).

[0069] The second eccentric portion 451 can be hinged to the first end of the second connecting rod 440. For example, the second eccentric portion 451 can protrude from the second eccentric member in a direction parallel to the axial direction X and form a hinge shaft. The first end of the second connecting rod 440 can form a hinge hole that is hinged to the hinge shaft. Of course, the second eccentric portion 451 can also be a hinge hole provided in the second eccentric member, and the first end of the second connecting rod 440 can form a hinge shaft that is hinged to the hinge hole. In some embodiments, the hinge shaft and the hinge hole can also be connected by a structure such as a bushing or bearing to reduce transmission friction.

[0070] The second end of the second link 440 can be hinged to the second connecting end 413 of the first connector. There are also various hinge methods. For reference, please refer to the hinge connection between the second eccentric part 451 and the second link. It will not be described in detail here.

[0071] It is understandable that the second link 440 can be a rod-shaped or strip-shaped structure, which can extend along a straight line or along a broken line, etc. The specific design can be determined according to the actual situation.

[0072] In this embodiment, the motion of the first transmission component can be transmitted to the transducer through the second eccentric component 450 and the second connecting rod, which can provide as much clearance space as possible for the conveying part, and the structure is simple and easy to process and manufacture.

[0073] In some embodiments, the second eccentric member 450 includes a body 452 coaxially connected to the transducer 200 and a protrusion 453 protruding from the peripheral side of the body 452. The second eccentric part 451 is located on the protrusion 453. A first bearing 460 is also provided between the body 452 and the housing 100. The first bearing 460 and the protrusion 453 are arranged along the axial direction X.

[0074] In this embodiment, the second eccentric member 450 may include a body 452 and a protrusion 453. The body 452 may be a cylindrical structure, which may be fixed to the transducer 200, for example, it may be coaxially fixedly sleeved outside the conveying part of the transducer.

[0075] The protrusion can be formed by protruding outward from the peripheral side of the body 452, and the thickness of the protrusion 453 along the axial direction X can be less than the thickness of the body 452 along the axial direction. In some embodiments, the side surface of the protrusion 453 can be part of a cylindrical surface, that is, in a cross-section perpendicular to the axial direction X, the outer contour shape of the cross-section of the body and the protrusion can be the outer contour formed by two intersecting circles.

[0076] The second eccentric portion 451 can be located on the protrusion 453, for example, it can be located at the center of the protrusion.

[0077] In addition, a first bearing 460 can be sleeved on the outside of the main body 452. The first bearing 460 can be located on one side of the protrusion 453 along the axial direction X, so that the peripheral side of the main body 452 can be used in a reasonable way to connect the second connecting rod 440 and set the first bearing 460, thereby improving the rationality of the layout.

[0078] In this embodiment, by setting the body and the protrusion, the first bearing can be installed on the peripheral side of the body to improve the stability of the transducer swinging relative to the outer shell while realizing motion transmission.

[0079] Please refer to Figure 2 and Figure 3 In one embodiment, the driver 300 can be located at the end of the transducer body 220 away from the blade tip, and the transmission assembly 400 can be located between the driver 300 and the transducer body 220. The first eccentric member 420, the first connecting rod 430, the first connecting member 410, the second connecting rod 440, and the second eccentric member 450 can be sequentially arranged approximately along the axial direction X between the driver 300 and the transducer body 220. This embodiment minimizes the volume of the transmission assembly and the ultrasonic handle. Furthermore, since the ultrasonic handle is held approximately on the outer shell of the transducer, the position of the transmission assembly can be adjusted to keep it away from the holding position, resulting in greater grip stability.

[0080] In some embodiments, the maximum swing angle α of the transducer's reciprocating oscillation satisfies: 14° (degrees) ≤ α ≤ 23°.

[0081] It is understood that the transmission assembly 400 can drive the transducer 200 to reciprocate around the axial direction X. The maximum swing angle α of this reciprocating swing refers to the maximum angle by which the transducer can rotate clockwise (or counterclockwise). In this embodiment, the maximum swing angle α can be in the range of 14° to 23°, for example, α can be 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, or 23°, etc. In one embodiment, α can be 17.6°, thereby balancing cutting efficiency and the grip stability of the ultrasonic handpiece, and reducing soft tissue damage.

[0082] Continue to refer to Figure 4 and Figure 5 Both have the same perspective and components. Figure 4 The accompanying drawings show the reference numerals for the various components of the transmission assembly. Figure 5 The design dimensions between the various components are shown (these dimensions are in a plane perpendicular to the X-axis direction). Figure 5 The reference numerals for the middle components can be found in the attached drawings. Figure 4The eccentric dimension of the first eccentric member 420 (the dimension between the second eccentric portion and the output end of the driver) is D7; the dimension between the output end of the driver and the first hinge portion is D1; ​​the dimension between the connection point of the first connecting rod 430 and the first eccentric member 420 (the first eccentric portion 421) and the first connecting end 412 is D2; the distance between the first connecting end 412 and the first hinge portion 411 is D3; the distance between the first hinge portion 411 and the second connecting end 413 is D4; the distance between the connection point of the second connecting rod 440 and the second eccentric member 450 (the second eccentric portion 451) and the second connecting end 413 is D5; and the eccentric dimension of the second eccentric member 450 (the dimension between the second eccentric portion and the axis of the transducer) is D6. It can be understood that, unless otherwise stated, D1 to D7 refer to the distances between the rotation axes or center lines of each component. By adjusting one or more of the dimensions D1 to D7, the maximum swing angle α of the transducer can be changed.

[0083] In some embodiments, the transducer's oscillation frequency B can satisfy 1Hz (Hertz) ≤ B ≤ 6Hz, thereby balancing the accuracy of cutting and the safety of protecting soft tissue.

[0084] Figure 7 yes Figure 1 Installation diagram of the central sealing component; please refer to... Figure 1 and Figure 7 In some embodiments, a sealing element 510 is provided between the transducer 200 and the housing 100. The sealing element 510 is sleeved on the outside of the transducer 200, and the first end of the sealing element 510 facing the transmission assembly 400 along the axial direction X is sealed to the outer surface of the transducer 200, and the second end of the sealing element 510 along the axial direction X is sealed to the housing 100.

[0085] In this embodiment, the seal 510 can be made of sealing materials such as rubber or silicone. It can be connected between the transducer 200 and the housing 100, specifically, it can be connected between the end of the transducer near the blade and the housing 100.

[0086] The seal 510 can be a cylindrical structure extending along the axial direction X, which can be sleeved on the outside of the transducer. The length of the seal 510 along the axial direction can be less than the length of the transducer, so that both ends of the transducer can extend out of the seal 510.

[0087] The end of the seal 510 that faces away from the cutter head is its first end. Figure 7 The left end of the seal 510, the end closest to the cutter head is its second end ( Figure 7The first end of the seal 510 can be tightly fitted to the outer surface of the transducer, thereby achieving a sealed connection between the seal and the transducer. The second end of the seal 510 can be tightly fitted to the inner surface of the housing, thereby achieving a sealed connection between the seal and the housing.

[0088] In this embodiment, by setting a sealing element, the sealing element can be sealed between the outer shell and the transducer, thereby enabling the ultrasonic handle to withstand the pressure and steam during pressure steam sterilization. This allows the ultrasonic handle to be sterilized by pressure steam sterilization or other methods, facilitating aseptic control before and after use. Furthermore, steam or coolant during operation is less likely to enter the interior of the ultrasonic handle through the blade side, thus improving the service life of the ultrasonic handle.

[0089] In some embodiments, a sealing ring 520 is provided over the first end of the seal 510, and the sealing ring 520 presses the first end of the seal 510 against the outer surface of the transducer 200.

[0090] The sealing ring 520 can be a ring-shaped structure with elasticity. The sealing ring 520 can surround the side surface of the first end of the sealing member 510, so that it can press the first end of the sealing member 510 against the outer surface of the transducer by its own elasticity, thereby achieving a sealed connection between the first end of the sealing member and the outer surface of the transducer. The structure is simple.

[0091] In some embodiments, a cavity 511 is provided between the seal 510 and the outer surface of the transducer 200, and a second end of the seal 510 has a boss 512 protruding toward the outer surface of the transducer 200. The housing 100 is also provided with a second connector 130, at least a portion of which abuts against the inner side of the boss 512 toward the cavity 511 to press the boss 512 against the portion of the housing 100 outside the boss 512.

[0092] In this embodiment, the second end of the seal 510 may have a boss 512 protruding toward the outer surface of the transducer 200. The boss 512 may be an annular structure surrounding the transducer, thereby reducing the opening size of the second end of the seal.

[0093] The housing 100 may have a portion protruding toward the outer surface of the transducer 200. Figure 7 (as indicated by the outer casing 100), this part can be substantially parallel to the boss 512, and the boss 512 can be located inside this part of the outer casing. The second connector 130 can press the boss 512 onto this part of the outer casing 100.

[0094] The structure of the second connector 130 can be varied. For example, it can be a clamping structure that clamps the two from the inside of the boss 512 and the outside of the outer shell of this part to achieve a seal.

[0095] In this embodiment, the seal between the sealant and the outer shell can be achieved through the structure of the boss and the outer shell, and this is easy to implement. The area of ​​the opening near the tip of the ultrasonic handle can be reduced accordingly, making it less likely for steam and coolant to enter the outer shell.

[0096] In some embodiments, the second connector 130 includes a cylindrical body 131 extending along the axial direction X and a clamping part 132 connected to one end of the cylindrical body 131. The cylindrical body 131 is sleeved on the outside of the transducer 200 and is located between the boss 512 and the transducer 200. The clamping part 132 abuts against the inner side of the boss 512. The other end of the cylindrical body 131 away from the clamping part 132 protrudes out of the outer shell 100. A second fastener 140 is also provided on the outer side of the outer shell 100 away from the boss 512. The second fastener 140 is screwed to the other end of the cylindrical body 131 to clamp the boss 512 and part of the outer shell 100 between the second fastener 140 and the clamping part 132.

[0097] In this embodiment, neither the boss 512 nor the portion of the outer shell 100 that abuts the boss 512 is attached to the inner surface of the transducer; that is, there is a gap between the boss 512, the outer shell 100, and the outer surface of the transducer. The second connector has a cylindrical body 131 extending along the axial direction, which can be inserted into the gap and surround the transducer 200.

[0098] One end of the cylindrical body 131 can be located inside the cavity 511, and this end can be connected to a pressing part 132. The pressing part 132 can protrude outward from the circumferential side of the cylindrical body 131. It can be understood that the pressing part 132 can also be a ring structure, which fits against the inner side of the boss 512 along the axial direction, while the outer side of the boss 512 along the axial direction X can abut against the outer shell.

[0099] The other end of the cylindrical body 131 can extend out of the outer shell 100, and the outer circumferential surface of this end can be provided with external threads. A second fastener 140 can also be provided on the outside of the outer shell 100, which can fit against the side of the outer shell away from the boss. The second fastener can be hollow inside to facilitate the connection of the transducer to the cutter head. The inner wall of the second fastener 140 can also be provided with internal threads, so that the second fastener 140 can be sleeved and screwed onto the end of the cylindrical body with external threads and abut against the outside of the outer shell. Through the second connector and the second fastener, the clamping part, the boss, part of the outer shell and the second fastener can be sequentially fitted and connected along the axial direction. And through the threaded connection between the second fastener and the cylindrical body, the boss and part of the outer shell can be clamped between the clamping part and the second fastener, thereby achieving a sealed connection between the boss and the outer shell. The structure is simple and easy to disassemble and assemble.

[0100] Figure 8 yes Figure 1Installation diagram of heat exchange piping and transducers. Please refer to... Figure 8 The outer casing 100 is also provided with a heat exchange pipe 530. The transducer 200 has a conveying section 210 extending along the axial direction X. The heat exchange pipe 530 and the conveying section 210 are connected by a flexible pipe 540. The flexible pipe 540 has a first opening 541 and a second opening 542 that are arranged opposite to each other. The first end of the heat exchange pipe 530 located inside the outer casing 100 passes through the first opening 541 and is sealed to the inner wall of the flexible pipe 540. The first end of the conveying section 210 passes through the second opening 542 and is sealed to the inner wall of the flexible pipe 540.

[0101] In this embodiment, the conveying unit 210 can be connected to the side of the transducer body 220 away from the cutter head. The conveying unit 210 can communicate with the channel inside the transducer body 220, and the axial direction of the conveying unit 210 is also the axial direction X of the transducer body 220. The transmission component can be connected to the conveying unit 210 for transmission, thereby driving the conveying unit 210 to swing, so as to realize the reciprocating swing of the transducer 200.

[0102] The outer casing 100 is also provided with a heat exchange pipe 530. The first end of the heat exchange pipe 530 is used to connect to the delivery unit 210, and the second end can extend out of the outer casing 100 so as to connect to the heat exchange medium delivery device. The heat exchange medium, such as physiological saline, can enter the delivery unit 210 through the heat exchange pipe 530 and flow to the cutter head through the channel inside the transducer body 220, thereby cooling the transducer body and the cutter head.

[0103] The heat exchange piping 530 and the conveying section 210 can be made of materials such as metal and plastic, and are not easily deformed. The two can be connected by a flexible piping 540.

[0104] The flexible conduit 540 can be made of a flexible material, such as silicone or rubber, which can deform under external force. The flexible conduit 540 may include a first opening 541 and a second opening 542, which are arranged opposite each other. The first end of the conveying section 210, away from the transducer body, can extend into the flexible conduit through the second opening 542 and be sealed to the flexible conduit 540. For example, an annular protrusion can be formed on the periphery of the first end of the conveying section 210, which can be interference-fitted onto the flexible conduit 540. Alternatively, the flexible conduit 540 can also use its own deformation capacity to clamp the conveying section, thereby achieving a sealed connection. Another example is that a clamping part can be provided on the outer side of the flexible conduit 540, which can press and seal the flexible conduit 540 to the first end of the conveying section 210.

[0105] Furthermore, the first end of the heat exchange pipe 530 located in the outer casing 100 can extend into the interior of the flexible pipe through the first opening 541 and be sealed to the flexible pipe 540. For example, an annular protrusion can be formed on the periphery of the first end of the heat exchange pipe 530, and this annular protrusion can also be interference-fitted onto the flexible pipe 540. In addition, the flexible pipe 540 can also rely on its own deformation capacity to clamp the heat exchange pipe, thereby achieving a sealed connection. For another example, a clamping part can also be provided on the outer side of the flexible pipe 540 to compress and seal the flexible pipe 540 to the outside of the heat exchange pipe 530.

[0106] There can be no direct contact or connection between the heat exchange pipeline and the delivery section, but the flow of the heat exchange medium between the heat exchange pipeline and the delivery section can be achieved through flexible pipelines.

[0107] In this embodiment, a flexible pipeline is used to indirectly connect the heat exchange pipeline and the conveying section, allowing the heat exchange medium to flow smoothly from the heat exchange pipeline into the conveying section. Furthermore, since the conveying section can reciprocate under the drive of the transmission assembly, while the heat exchange pipeline is typically fixed relative to the outer shell, the deformation of the flexible pipeline allows one end to reciprocate with the conveying section, while the other end remains relatively stationary. This not only avoids hindering the reciprocating motion of the conveying section but also achieves sealing and flow of the heat exchange medium. The structure is simple and easy to implement.

[0108] In some embodiments, such as Figure 8 As shown, the first end of the conveying section 210 has a fitting part 550, and the first end of the heat exchange pipeline 530 has a mating part 560. The fitting part 550 is fitted outside the mating part 560, and there is a gap D between the inner surface of the fitting part 550 and the outer surface of the mating part 560.

[0109] In this embodiment, the mating part 560 can be formed by the end of the heat exchange pipeline. Furthermore, the outer diameter of the mating part 560 can be slightly smaller than the outer diameter of other parts of the heat exchange pipeline. The fitting part 550 can be a cylindrical structure, which can be fitted over the mating part 560. In one embodiment, the outer diameter of the fitting part 550 can be slightly larger than the outer diameter of other parts of the conveying part.

[0110] The inner diameter of the fitting part 550 can be larger than the outer diameter of the mating part 560, so that there can be a gap D between the fitting part 550 and the mating part 560. It can be understood that the gap D can be an annular gap, that is, there is no direct contact between the fitting part 550 and the mating part 560.

[0111] In other embodiments, the first end of the conveying section 210 has a mating portion, and the first end of the heat exchange pipeline 530 has a fitting portion, which is fitted over the mating portion, and there is a gap between the inner surface of the fitting portion and the outer surface of the mating portion.

[0112] It is understood that in this embodiment, the fitting part can be provided in the heat exchange pipeline 530, and the mating part can be provided in the conveying part. The structure and mating method of the fitting part and the mating part can be referred to the above embodiment, and will not be repeated here.

[0113] It is understandable that when cleaning the heat exchange channel, tools such as brushes or fine wires can be used to reach into the heat exchange pipeline and delivery section for cleaning. Since the fitting part 550 fits outside the mating part 560, the tool is blocked by the fitting part when passing through the flexible pipeline and will not directly contact the flexible pipeline, reducing the risk of puncturing the flexible pipeline. This prevents the heat exchange medium from leaking into the ultrasonic handle and helps improve the reliability of the ultrasonic handle.

[0114] In some implementations, the gap D satisfies: D < 0.5 mm.

[0115] In this embodiment, the gap D can be 0.4mm, 0.3mm, 0.2mm, etc. By setting the gap to be less than 0.5mm, the tool is less likely to protrude from the gap and puncture the flexible pipe. At the same time, the size of the fitting part can be reduced accordingly, thereby reducing the size of the flexible pipe and making the structure compact.

[0116] In some embodiments, the outer surface of the heat exchange pipeline 530 is provided with a protrusion 531 and a threaded section 532 located on the side of the protrusion 531 away from the conveying section 210. A third fastener 150 is provided on the outer surface of the housing 100. The third fastener 150 is screwed to the threaded section 532 to press part of the housing 100 between the protrusion 531 and the third fastener 150.

[0117] A protrusion 531 may be provided at the connection between the heat exchange pipe 530 and the outer casing 100. The protrusion 531 may be located inside the outer casing 100 and abut against a portion of the outer casing 100. The outer surface of the portion of the heat exchange pipe 530 extending outside the outer casing 100 may have a threaded section 532, which is located on the side of the protrusion 531 facing away from the conveying section 210.

[0118] The third fastener 150 can be a hollow structure, such as a nut structure, which can be sleeved on the outside of the heat exchange pipeline, and the inner surface of the third fastener can have an internal thread section that mates with the threaded section 532. The third fastener 150 can be screwed onto the threaded section, so that the protrusion 531 and the third fastener 150 can clamp the part of the outer shell located between them, thereby realizing the fixed connection between the heat exchange pipeline and the outer shell.

[0119] This embodiment achieves a fixed connection between the heat exchange pipeline and the outer shell through the cooperation of the protrusion and the third fastener. The structure is simple, easy to disassemble and assemble, and easy to process.

[0120] In some embodiments, a sealing ring 580 may be fitted over the heat exchange pipeline between the protrusion 531 and the threaded section 532. The sealing ring 580 can seal the outer shell 100 and the heat exchange pipeline 530 to improve the sealing capability.

[0121] This application also provides an ultrasonic bone scalpel, including: a scalpel head and an ultrasonic handle as described in any of the above embodiments, the scalpel head passing through the housing of the ultrasonic handle, and the scalpel head being connected to the transducer of the ultrasonic handle.

[0122] The structure and function of the ultrasonic handpiece are the same as in any of the above embodiments, and can be referred to the above embodiments for details, which will not be repeated here.

[0123] The ultrasonic bone scalpel provided in this embodiment has the ultrasonic handle of any of the above embodiments, and therefore also has the beneficial effects of any of the above embodiments, which will not be repeated here.

[0124] This application also provides an ultrasonic surgical device, including the ultrasonic bone scalpel of any of the above embodiments.

[0125] The structure and function of the ultrasonic bone scalpel are the same as those in the above embodiments, and can be referred to the above embodiments for details, which will not be repeated here.

[0126] The ultrasonic surgical device provided in this embodiment can be used in surgical procedures involving bone cutting, such as cutting bone tissue by grinding or drilling. Furthermore, because the ultrasonic surgical device possesses the ultrasonic bone scalpel from any of the above embodiments, it also exhibits the beneficial effects of any of the above embodiments, which will not be elaborated further.

[0127] It should be understood that in this specification, the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship or dimensions based on the orientation or positional relationship or dimensions shown in the accompanying drawings. These terms are used only for ease of description and are not intended to 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 should not be construed as limiting the scope of protection of this disclosure.

[0128] Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.

[0129] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., 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, an electrical connection, or a communication 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. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0130] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0131] This specification provides many different implementations or examples that can be used to implement this disclosure. It should be understood that these different implementations or examples are entirely exemplary and are not intended to limit the scope of this disclosure in any way. Those skilled in the art will be able to conceive of various variations or substitutions based on the disclosure of this specification, and these should all be covered within the scope of this disclosure. Therefore, the scope of this disclosure should be determined by the scope defined in the appended claims.

Claims

1. An ultrasonic handpiece, characterized in that, include: shell; A transducer is connected inside the housing and is used to connect with a cutting head to drive the cutting head to vibrate relative to the housing along the axial direction of the transducer. The driver is connected inside the housing; A transmission assembly is connected between the driver and the transducer, and the transmission assembly is used to convert the mechanical energy output by the driver into the reciprocating oscillation of the transducer about the axis.

2. The ultrasonic handpiece according to claim 1, characterized in that, The transmission assembly includes a first connector, which has a first hinge portion, a first connecting end, and a second connecting end. The first hinge portion is hinged to the housing, the first connecting end is driven to the output end of the driver, and the second connecting end is driven to the transducer. A preset angle is formed between the first connecting line between the first connecting end and the first hinge portion and the second connecting line between the second connecting end and the first hinge portion.

3. The ultrasonic handpiece according to claim 2, characterized in that, The first hinge portion includes a first hinge hole, and the outer casing is provided with a first hinge shaft, wherein the first hinge hole is hinged to the first hinge shaft; The housing is also provided with a first fastener, which is screwed into the threaded hole of the housing, and one end of the first fastener passes through the threaded hole and abuts against the peripheral side of the first hinge shaft.

4. The ultrasonic handpiece according to claim 2, characterized in that, The first connector includes a first strip and a second strip connected to one end of the first strip. The first hinge portion is disposed at the connection position between the first strip and the second strip. The first connecting end is located at the end of the first strip away from the first hinge portion, and the second connecting end is located at the end of the second strip away from the first hinge portion.

5. The ultrasonic handpiece according to claim 2, characterized in that, The transmission assembly further includes a first eccentric member and a first connecting rod. The first eccentric member is connected to the output end of the driver, and the first eccentric member has a first eccentric portion at a preset distance from the output end of the driver. The first eccentric portion is hinged to a first end of the first connecting rod, and a second end of the first connecting rod is hinged to the first connecting end.

6. The ultrasonic handpiece according to claim 2, characterized in that, The transmission assembly further includes a second connecting rod and a second eccentric member. The second eccentric member is connected to the transducer, and the second eccentric member has a second eccentric portion at a predetermined distance from the axis of the transducer. The second eccentric portion is hinged to the first end of the second connecting rod, and the second end of the second connecting rod is hinged to the second connecting end.

7. The ultrasonic handpiece according to claim 6, characterized in that, The second eccentric component includes a body coaxially connected to the transducer and a protrusion protruding from the peripheral side of the body. The second eccentric component is located on the protrusion. A first bearing is also provided between the body and the housing. The first bearing and the protrusion are arranged along the axial direction.

8. The ultrasonic handpiece according to claim 1, characterized in that, The maximum swing angle α of the reciprocating oscillation of the transducer satisfies: 14°≤α≤23°.

9. The ultrasonic handpiece according to any one of claims 1-7, characterized in that, A sealing element is provided between the transducer and the housing. The sealing element is sleeved on the outside of the transducer, and the first end of the sealing element facing the transmission assembly along the axial direction is sealed to the outer surface of the transducer. The second end of the sealing element along the axial direction is sealed to the housing.

10. The ultrasonic handpiece according to claim 9, characterized in that, The first end of the seal is fitted with a sealing ring, which presses the first end of the seal against the outer surface of the transducer.

11. The ultrasonic handpiece according to claim 9, characterized in that, There is a cavity between the seal and the outer surface of the transducer. The second end of the seal has a boss protruding toward the outer surface of the transducer. The housing is also provided with a second connector. At least a portion of the second connector abuts against the inner side of the boss toward the cavity to press the boss against the portion of the housing outside the boss.

12. The ultrasonic handpiece according to claim 11, characterized in that, The second connector includes a cylindrical body extending along the axial direction and a clamping part connected to one end of the cylindrical body. The cylindrical body is sleeved on the outside of the transducer and is located between the boss and the transducer. The clamping part abuts against the inner side of the boss, and the other end of the cylindrical body away from the clamping part protrudes out of the outer shell. A second fastener is provided on the outer side of the outer shell away from the boss. The second fastener is screwed to the other end of the cylindrical body to clamp the boss and part of the outer shell between the second fastener and the clamping part.

13. The ultrasonic handpiece according to any one of claims 1-7, characterized in that, The outer shell is also provided with heat exchange pipes, the transducer has a conveying part extending along the axial direction, the heat exchange pipes and the conveying part are connected by a flexible pipe, the flexible pipes have a first opening and a second opening arranged opposite to each other, the first end of the heat exchange pipe located inside the outer shell passes through the first opening, and the first end of the heat exchange pipe is sealed to the inner wall of the flexible pipe. The first end of the conveying section passes through the second opening, and the first end of the conveying section is sealed to the inner wall of the flexible pipeline.

14. The ultrasonic handpiece according to claim 13, characterized in that, The first end of the conveying section has a fitting portion, and the first end of the heat exchange pipeline has a mating portion. The fitting portion is sleeved on the outside of the mating portion, and there is a gap between the inner surface of the fitting portion and the outer surface of the mating portion; or... The first end of the conveying section has a mating part, and the first end of the heat exchange pipeline has a fitting part. The fitting part is fitted outside the mating part, and there is a gap between the inner surface of the fitting part and the outer surface of the mating part.

15. The ultrasonic handpiece according to claim 14, characterized in that, The gap D satisfies the following condition: D < 0.5 mm.

16. The ultrasonic handpiece according to claim 13, characterized in that, The outer surface of the heat exchange pipeline is provided with a protrusion and a threaded section located on the side of the protrusion away from the conveying part. A third fastener is provided on the outer shell and is screwed to the threaded section to press part of the outer shell between the protrusion and the third fastener.

17. An ultrasonic bone scalpel, characterized in that, include: The blade and the ultrasonic handle as described in any one of claims 1-16, wherein the blade passes through the housing of the ultrasonic handle and is connected to the transducer of the ultrasonic handle.

18. An ultrasonic surgical device, characterized in that, Including the ultrasonic bone scalpel as described in claim 17.

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