CN111166430A - Ultrasonic transducer and ultrasonic surgical instrument comprising same - Google Patents

Abstract

The invention provides an ultrasonic transducer and an ultrasonic surgical instrument comprising the same. The ultrasonic transducer includes: the conductive assembly comprises an insulating fixed seat and three conductive rings axially arranged in parallel at intervals in the front of the insulating fixed seat, and the three conductive rings are spaced by two annular insulating parts in the front of the insulating fixed seat; the rear part of the insulating fixed seat comprises one or more convex bodies which extend axially backwards and are installed on the front shell through a connector; the first conducting ring, the second conducting ring, the insulating fixed seat, one or more convex bodies on the insulating fixed seat and the two annular insulating parts are integrally formed by encapsulation and injection molding; the third conductive ring is secured to the front end of the front shell by an interference fit. The invention has compact structure, convenient installation, stable and reliable connection after assembly and can realize the relative sealed installation of ultrasonic transducer parts.

Description

Ultrasonic transducer and ultrasonic surgical instrument comprising same

Technical Field

The invention relates to the technical field of medical instruments, in particular to an ultrasonic transducer and an ultrasonic surgical instrument comprising the same.

Background

Ultrasonic surgical instruments include components such as an ultrasonic generator, an ultrasonic transducer, and an execution site, where the ultrasonic transducer converts high frequency electrical signals from the ultrasonic generator into ultrasonic mechanical energy and transmits mechanical vibrations at ultrasonic frequencies to the surgical end execution site, which may be used to cut, dissect, pull or cauterize tissue or to separate muscle tissue from bone, thereby cutting and/or coagulating organic tissue. Ultrasonic surgical instruments may thus be used for open procedures or minimally invasive procedures, such as endoscopic or laparoscopic procedures, in which an end effector is passed through a trocar to reach a surgical site.

The end effector of a solid core ultrasonic surgical instrument can be activated with ultrasonic frequencies to induce longitudinal vibrations, thereby generating localized heat within adjacent tissue. Because of this characteristic of ultrasonic instruments, ultrasonically driven end effectors may be designed to perform a number of functions, including cutting and coagulating functions. For example, through an electrically activated transducer, the transducer converts an ultrasonic frequency electric signal into ultrasonic frequency mechanical vibration, the mechanical wave is transmitted to a wave guide rod through the front part of the transducer, the mechanical wave is transmitted along the wave guide rod, and finally the ultrasonic frequency mechanical vibration energy is focused on the tip of a cutter head to act on the targeted tissue, so that the cutting and hemostasis functions are realized.

Ultrasonic surgical instruments including, but not limited to: endocutter, grasper, cutter, staplers, clip applier, access device, drug/gene therapy delivery device, and energy delivery device using ultrasound, radiofrequency, laser, etc., and/or any combination thereof.

Ultrasonic transducer is the core component in the whole set of system, plays the effect of converting the electric energy into mechanical energy, the trigger excitation signal in the handle and the effect of encrypting chip signal transmission back to the host computer simultaneously, still need compromise the transducer and need wash many times, accept the demand that repeatedly uses behind disinfection and sterilization modes such as high temperature and high humidity, consequently carry out special design to ultrasonic transducer's inside electrical connection and anterior conductive component and connection structure to avoid inside ultrasonic transducer damage or the inside short circuit that causes of water or steam infiltration handle.

Disclosure of Invention

Aiming at the defects existing in the background technology, the invention aims to solve the technical problems that: the ultrasonic transducer can be cleaned for multiple times, can be disinfected at high temperature and high humidity, has compact structure and good sealing performance, and is reasonable and simple in electrical connection.

In order to achieve the purpose, the invention adopts the following technical scheme:

an ultrasonic transducer comprises a front shell and a conductive assembly connected to the front end of the front shell, wherein the conductive assembly comprises an insulating fixed seat which is generally cylindrical and is provided with a central through hole, and a first conductive ring, a second conductive ring and a third conductive ring which are axially arranged in parallel at intervals in the front of the insulating fixed seat, and two annular insulating parts in the front of the insulating fixed seat separate the first conductive ring, the second conductive ring and the third conductive ring;

the rear part of the insulating fixed seat comprises one or more convex bodies extending axially backwards, and the one or more convex bodies are mounted on the front shell through a connector;

the first conducting ring and the second conducting ring, the insulating fixing seat, one or more convex bodies on the insulating fixing seat and two annular insulating parts are integrally formed through encapsulation and injection molding, and the first conducting ring and the second conducting ring are tightly wrapped by the two annular insulating parts and are fixed on the insulating fixing seat;

the third conductive ring dimensionally completely covers the outer surface of the connector and is secured to the front end of the front shell by an interference fit.

In the above ultrasonic transducer, the front end of the front housing includes a substantially cylindrical boss, the boss includes one or more receiving grooves formed axially, and the one or more protrusions and the one or more receiving grooves are matched in shape and are engaged with each other and fixed together by the connector.

In the ultrasonic transducer, a plurality of positioning protrusions extend axially from the rear portions of the first conductive ring and the second conductive ring, an axial positioning recess is provided inside each of the positioning protrusions, the positioning protrusions are matched in shape with and embedded in the positioning through holes in the bottom surface of the insulating fixing seat, and electrical contact points are provided on the first conductive ring and the second conductive ring, respectively.

In the above ultrasonic transducer, the rear part of the insulating fixing seat is extended with an integrally formed convex part, a hollow depressed part is arranged in the raised part, two wire passing holes are arranged at the bottom of the depressed part, the front ends of the two wire passing holes are separated by the two annular insulating parts, the boss of the front shell is provided with a concave groove, the shape and the position of the convex part are matched with the concave groove and inserted into the concave groove, the concave part and the bottom surface of the concave groove form a closed space after the convex part is buckled with the concave groove, the bottom surface of the concave groove is also provided with wire passing holes, and the first conducting wire and the second conducting wire penetrate through the wire passing holes in the concave groove and correspondingly penetrate through the two wire passing holes in the concave part to be in contact with electric contact points on the first conducting ring and the second conducting ring so as to form electric connection.

In the above ultrasonic transducer, the recessed groove in the front of the front housing and the recessed portion in the rear of the insulating fixing base are filled with a gel material for sealing the wire passing holes of the recessed groove and the two wire passing holes of the recessed portion, through which the first and second wires pass.

In the ultrasonic transducer, the side surfaces of the first conductive ring and the second conductive ring are provided with grooves, and the grooves of the side surfaces of the first conductive ring and the grooves of the side surfaces of the second conductive ring are matched with corresponding protrusions integrally formed on the side surfaces of the two annular insulating parts, are embedded together, and are locked with each other.

In the ultrasonic transducer, the groove on the side surface of the first conductive ring and the groove on the side surface of the second conductive ring are both annular grooves.

In the ultrasonic transducer, the front ends of the first conductive ring and the second conductive ring are provided with an annular groove in the axial direction.

In the above ultrasonic transducer, the front portion of the middle shell is connected to the rear portion of the front shell by interference fit, an outer diameter of the middle shell abutting against the rear end of the front shell is the same as an outer diameter of the rear end of the front shell, and the outer diameter of the middle shell gradually decreases after the middle shell is spaced from the rear end of the front shell from front to rear.

The invention also provides an ultrasonic surgical instrument comprising the ultrasonic transducer of any one of the above.

Compared with the prior art, the invention has the beneficial effects that:

1. the assembly manufactured through the encapsulation and injection molding integrated forming is more compact and reliable in structure, and the limited assembly space is more fully utilized when the assembly is combined with other parts.

2. The structure formed by the encapsulation and injection molding integrated molding and the interference fit can realize the relative sealed installation of ultrasonic transducer parts, can play a sealing role during high-temperature and high-pressure sterilization, and prevents water vapor from entering the transducer.

3. Due to the fact that the structure of the line passing hole is specially arranged on the structure, internal wiring of the ultrasonic surgical instrument is facilitated, flexibility and reasonability of circuit layout are improved, more wires can be arranged in a limited space, and function expansion of the ultrasonic surgical instrument is facilitated.

4. Overall structure is simple, and manufacturing process is simple, and simple to operate can reduce the assembly degree of difficulty for the installation rate, connects reliable and stable after the assembly is accomplished, and job stabilization nature is high.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic external structural diagram of an ultrasonic transducer provided by the present invention;

fig. 2 is a cross-sectional view of the internal structure of an ultrasonic transducer provided by the present invention;

FIG. 3 is an exploded view of the front housing and conductive components of an ultrasonic transducer provided by the present invention;

FIG. 4 is an exploded schematic view of another perspective of the front housing and conductive components of the ultrasonic transducer provided by the present invention;

fig. 5 is a schematic perspective view of a conductive assembly of an ultrasonic transducer provided by the present invention;

in the figure: 1. a first conductive ring; 1-1. a groove on the side surface of the first conductive ring; 1-2, a groove at the front end of the first conducting ring; 2. a second conductive ring; 2-1, a groove on the side surface of the second conductive ring; 2-2, a groove at the front end of the second conducting ring; 3. a third conductive ring; 4. an insulating fixed seat; 4-1. convex body; 4-2. a convex part; 4-2-1. a recess; 5. a front housing; 5-1, a containing groove; 5-2, a concave groove; 6. a middle shell; 7. a transducer horn assembly; 8. a first conductive line; 9. a second conductive line; 10. a connector; 100. an electrically conductive component.

Detailed Description

The following description of certain embodiments of the invention is not limited in its application to the details of construction and the arrangement of components set forth in the accompanying drawings and description. The illustrated embodiments of the invention are capable of being practiced or being incorporated in other embodiments, variations and modifications, and may be practiced or carried out in various ways. Furthermore, unless otherwise indicated, the terms and expressions employed herein have been chosen for the purpose of describing the illustrative embodiments of the present invention for the convenience of the reader and are not for the purpose of limiting the invention.

It should be understood that the terms "forward" and "rearward" as used herein refer to a direction toward the patient and a direction away from the patient when the handle of the ultrasonic surgical tool is in operation. Ultrasonic surgical instruments are used in a variety of orientations and positions, and these terms are not intended to be limiting and are not absolute.

The terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, it is to be understood that any one or more of the following-described embodiments, expressions of embodiments, examples, etc. can be combined with any one or more of the other following-described embodiments, expressions of embodiments, examples, etc.

Examples

As shown in fig. 1-5, the present invention provides an ultrasonic transducer, which includes a front housing 5 and a conductive assembly 100 connected to a front end of the front housing 5, wherein the conductive assembly 100 includes a generally cylindrical insulating holder 4 having a central through hole, and a first conductive ring 1, a second conductive ring 2, and a third conductive ring 3 axially spaced in parallel at a front portion of the insulating holder 4, and two annular insulating portions at the front portion of the insulating holder 4 separate the first conductive ring 1, the second conductive ring 2, and the third conductive ring 3. The central throughbore receives the horn at the front of the horn assembly 7. The diameter of the first conductive ring 1 is smaller than that of the second conductive ring 2, the diameter of the second conductive ring 2 is smaller than that of the third conductive ring 3, and the three conductive rings are coaxially arranged so that their axes coincide with each other. The first conductive ring 1 is closest to the central via, followed by the second conductive ring 2 and the third conductive ring 3 in that order, as shown in fig. 3-5. The axes of the first conductive ring 1, the second conductive ring 2, the third conductive ring 3 and the two annular insulating parts at the front part of the insulating fixed seat 4 are coincident with the central line of the ultrasonic transducer horn assembly. The first conductive ring 1 and the second conductive ring 2 are coaxially arranged, so that the assembly space can be more fully utilized. The outer diameter of the third conductive ring 3 is smaller than or equal to the outer diameter of the front shell 5. The central through hole of the insulating fixed seat 4 and the central through hole of the first conductive ring are not in direct contact with the front amplitude transformer of the ultrasonic transducer amplitude transformer assembly, but a certain gap is kept, so that enough space is reserved for the vibration of the amplitude transformer. The insulating fixed seat is made of insulating materials and plays a role in blocking conduction between the conducting materials. The insulating material includes rubber, resin, or the like. Preferably, the insulating material is Polycarbonate (PC). The polycarbonate has the characteristics of high transparency, light weight, impact resistance, sound insulation, heat insulation, flame resistance, aging resistance and the like.

The rear of the insulating holder 4 includes one or more projections 4-1 extending axially rearward, and the one or more projections 4-1 are mounted to the front housing 5 by a connector 10, as shown in fig. 3-4. The meaning of a plurality is that the number is two or more. Wherein the plurality of asperities 4-1 may be uniformly or non-uniformly distributed around the circumference. Preferably, the number of convexities is 1-6. More preferably, the number of convexities is 4. The number of connectors 10 is the same as the number of bosses 4-1. In addition, the connector 10 can prevent the front shell 5 from rotating relative to the insulating fixing seat 4. The connector 10 includes any one or any combination of screws, adhesives, pins, clips, or snaps. As shown in fig. 3 and 4, the connectors 10 are screws and are 4 in number, evenly distributed on the circumference.

The first conductive ring 1 and the second conductive ring 2, the insulating fixing base 4, and one or more protrusions 4-1 and two annular insulating portions thereon are integrally formed by encapsulation and injection molding, and the first conductive ring 1 and the second conductive ring 2 are tightly wrapped by the two annular insulating portions and fixed on the insulating fixing base 4. Through the encapsulation injection molding process, the inner surface and/or the outer surface and/or the end part of the first conductive ring and the second conductive ring are/is provided with a structure combined with the insulating fixed seat, and the combined structure is a protrusion or a recess so as to increase the surface area of the combination of the conductive ring and the insulating fixed seat, increase the combined strength and ensure the compactness and the firmness of the whole structure. The structure formed by the encapsulation injection molding process can reduce or even prevent air, water vapor or dust and the like from entering the conductive assembly, and more fully utilizes the space between the two conductive rings and the insulating fixed seat. One or more protrusions integrally formed at the rear part of the insulating fixed seat 4 are connected with the corresponding structure at the front end of the front shell 5 through a connector 10, so that the mounting space of the insulating fixed seat and the front shell can be saved, and the structure is more compact. The material of the first, second and third conductive rings is metal, such as gold, silver, copper, or aluminum. Preferably, the material of the first, second and third conductive rings is copper.

The third conductive ring 3 is dimensioned to completely cover the outer surface of the connector 10 and is fixed to the front end of the front shell 5 by interference fit, as shown in fig. 1-2. Therefore, the appearance attractiveness is guaranteed, the connector 10 can be well protected, and the reliability of grounding connection between the third conductive ring 3 and the front shell 5 is also guaranteed. The third conductive ring 3 surrounds the other parts of the front end of the front shell 5 besides covering the connector 10, and is fastened to the front end of the front shell by interference fit (the front end of the front shell is equivalent to a shaft and is directly and hard pressed with a through hole of the third conductive ring). This third conducting ring, it is the ground ring essentially, can realize short circuit, ground connection function through installing the earth connection on the ground ring when the wire has electricity suddenly, guarantee operating personnel's safety. The structure formed by the encapsulation injection molding process and the structure formed by interference fit can meet the requirement that the transducer needs to be cleaned for many times and can be repeatedly used after being subjected to high-temperature high-humidity sterilization and other sterilization modes.

The first conducting ring, the second conducting ring and the insulating fixing seat are fixed together, the third conducting ring is fastened at the front part of the front shell, the positions and the structures of the three conducting rings on the ultrasonic transducer are well designed, the whole structure is compact and tight, the problem of sealing is solved, the mounting space is saved, and the combination is firmer.

The front end of the first conductive ring 1 and the front end of the second conductive ring 2 may be in the same plane in the axial direction, and the front end of the third conductive ring 3 and the front ends of the first conductive ring 1 and the second conductive ring 2 may or may not be in the same plane in the axial direction. For example, the front end of the third conductive ring 3 is located slightly behind the plane where the front ends of the first conductive ring 1 and the second conductive ring 2 are located. Also for example, the three conductive rings are arranged obliquely with a certain gradient. Preferably, the front end of the third conductive ring 3 is in the same plane in the axial direction as the front end of the first conductive ring 1 and the front end of the second conductive ring 2, as shown in fig. 5. Of course, the particular arrangement of the three conductive rings depends on the arrangement of the electrodes inside the ultrasonic surgical instrument to which they are connected.

In one embodiment, the front end of the front housing 5 includes a generally cylindrical boss including one or more axially-formed receiving slots 5-1, and the one or more projections 4-1 are shaped to mate with and interfit with the one or more receiving slots 5-1 and are secured together by the connector 10, as shown in FIG. 3. The boss has a diameter smaller than the outer diameter of the front shell 5. The number of the convex bodies 4-1 is equal to that of the accommodating grooves 5-1. Since the protrusions correspond to the receiving grooves, when a plurality of protrusions are provided, the front housing 5 is correspondingly provided with receiving grooves 5-1 having the same number and matching positions, and connectors having the same number are also required. The embedding can improve the universality of parts, greatly accelerate the installation speed and improve the production efficiency.

In one embodiment, a plurality of positioning protrusions extend axially from the rear portion of each of the first conductive ring 1 and the second conductive ring 2, each of the positioning protrusions is provided with an axial positioning recess therein, the positioning protrusions are matched in shape with and correspondingly embedded in a plurality of positioning through holes in the bottom surface of the insulating fixing seat 4, and the first conductive ring 1 and the second conductive ring 2 are respectively provided with an electrical contact point, as shown in fig. 4. A plurality of positioning protrusions respectively arranged on the first conducting ring 1 and the second conducting ring 2 and axial positioning recesses arranged in the positioning protrusions are used for assisting in positioning during rubber coating injection molding, and the first conducting ring 1 and the second conducting ring 2 are fastened on an insulating fixing seat after the rubber coating injection molding is completed and cannot rotate relative to the insulating fixing seat.

In one embodiment, the rear portion of the insulating fixing base 4 further extends to form an integrally formed protruding portion 4-2, as shown in fig. 4, a hollow recessed portion 4-2-1 is provided inside the protruding portion 4-2, the bottom of the recessed portion 4-2-1 is provided with two wire through holes, the front ends of the two wire through holes are separated by the two annular insulating portions, a recessed groove 5-2 is provided on the boss of the front shell 5, the protruding portion 4-2 matches the recessed groove 5-2 in shape and position and is inserted into the recessed groove 5-2, the recessed portion 4-2-1 and the bottom surface of the recessed groove 5-2 form a closed space after the protruding portion 4-2 is fastened with the recessed groove 5-2, the bottom of the recessed groove 5-2 is also provided with a wire through hole, the first wire 8 and the second wire 9 pass through the wire passing holes in the concave groove and correspondingly pass through the two wire passing holes in the concave groove to contact with the electric contact points on the first conductive ring 1 and the second conductive ring 2 so as to form electric connection. The convex part 4-2 is formed at the rear part of the insulating fixed seat 4, and the concave part 4-2-1 is formed in the convex part, which is easily realized by injection molding and integral molding, the bottom surface of the concave part is on the same plane with the bottom surface of the insulating fixed seat, and the concave part 4-2-1 in the convex part 4-2 and the other part of the convex part 4-2 form a cup-shaped structure. The number of the projections 4-2 is one or more. The first and second wires are two power lines connected to the buttons on the handle of the ultrasonic surgical instrument incorporating the ultrasonic transducer of the present invention. As shown in fig. 3, a wire passing hole is provided in the recess groove. In fact, a plurality of wire through holes, for example, two wire through holes, can be arranged in the recessed groove according to actual needs. One end of the front housing facing the insulating holder 4 (i.e., the boss at the front end of the front housing) is provided with a recessed groove (the recessed groove is formed by machining) in order to easily form a wire passing hole at the front end of the front housing and to be matched with the protruding part in the insulating holder 4, thereby protecting the wire passing hole of the recessed part in the protruding part, the wire passing hole in the recessed groove of the front housing, and the first and second wires passing through the wire passing hole. The recessed groove is higher in height than the raised portion to allow some space for the first and second wires to pass through the recessed groove into the recessed portion 4-2-1 of the raised portion 4-2 if the wire passing hole of the recessed groove is disposed near the edge of the front case 5. The first conducting wire 8 is electrically contacted with the first conducting ring 1 through interference fit, that is, the conducting head of the first conducting wire 8 protrudes out of the plane where the conducting head is located and is directly and tightly abutted against the electric contact point of the first conducting ring 1; likewise, the second conductive wire 9 is also in electrical contact with the second conductive ring 2 by interference fit. The electrical contact may be a semicircular or cylindrical indentation. The convex portion 4-2 is inserted into the concave portion 4-2-1 surrounding the convex portion, and the concave portion 4-2-1 in the convex portion 4-2 forms a closed space together with the bottom surface of the concave groove 5-2. The closed space can be insulated from the penetration of water or water vapor. The first and second conductors are easy to enter the wire holes of the concave part 4-2-1 in the convex part 4-2 after passing through the wire holes in the concave groove 5-2, and then contact with the electric contact points on the two conductive rings, so that the designed electric structure is more reasonable, simple and direct. And the insertion structure can improve the universality of parts, greatly accelerate the installation speed and improve the production efficiency.

In one embodiment, the recessed groove 5-2 in the front of the front shell 5 and the recessed portion 4-2-1 in the rear of the insulating fixing base 4 are filled with a gel material for sealing the wire passing holes of the recessed groove and the two wire passing holes of the recessed portion through which the first and second wires pass. The filling colloid material is mainly used for sealing the wire through hole and fixing the first conducting wire and the second conducting wire.

In one embodiment, the side surface of the first conductive ring 1 and the side surface of the second conductive ring 2 are provided with grooves, and the grooves of the side surface of the first conductive ring 1 and the grooves of the side surface of the second conductive ring 2 are matched with and fitted together and locked with corresponding protrusions integrally formed on the two annular insulating parts. The structural arrangement is that the first conducting ring and the second conducting ring are not easy to fall off from the front end of the insulating fixed seat, and the first conducting ring and the second conducting ring are locked on the insulating fixed seat. When the insulation fixing seat is manufactured, grooves are machined in the first conducting ring and the second conducting ring, the two conducting rings and the insulation fixing seat are integrally formed through encapsulation and injection molding, and the two annular insulation parts of the insulation fixing seat are correspondingly formed with the protruding parts.

In one embodiment, the grooves on the sides of the first conductive ring 1 and the grooves on the sides of the second conductive ring 2 are both annular grooves 1-1,2-1, as shown in FIG. 4. The annular groove facilitates machining of the conductive ring, a circular groove can be formed in the conductive ring by only one-time machining, and the machining is easy and fast. And the contact area of the corresponding protruding parts which are integrally formed on the two annular insulating parts is larger, so that the first conducting ring 1 and the second conducting ring 2 can be tightly attached to the two annular insulating parts and locked with each other, and the structure is more stable.

In one embodiment, the front ends of the first conductive ring 1 and the second conductive ring 2 are provided with an annular groove 1-2,2-2 in the axial direction, as shown in fig. 3. The annular groove 1-2 at the front end of the first conductive ring 1 and the annular groove 2-2 at the front end of the second conductive ring 2 are used for accommodating a plurality of elastic conductive pins in a handle of an ultrasonic surgical instrument and are electrically connected with the elastic conductive pins, the elastic conductive pins are in axial contact with the first conductive ring and the second conductive ring, and since the elastic conductive pins are usually arranged at parallel intervals in the radial direction or the circumferential direction, the annular grooves corresponding to the radial direction or the circumferential direction are arranged to guide the elastic conductive pins to move in the annular grooves when the ultrasonic transducer translates or rotates and tightly abut against the walls of the annular grooves. The structure ensures the contact performance between the conducting ring and the elastic conducting pin, realizes smooth signal transmission and improves the product performance.

In one embodiment, the ultrasonic transducer further comprises a middle shell 6 coaxial with and connected to the front shell 5, a front portion of the middle shell 6 is connected to a rear portion of the front shell 5 by interference fit, an outer diameter of the middle shell 6 abutting against a rear end of the front shell 5 is the same as an outer diameter of a rear end of the front shell 5, and an outer diameter of the middle shell 6 gradually decreases after a distance from a front to a rear end of the front shell 5, as shown in fig. 2. The front end of the middle shell 6 also has a cylindrical protrusion which is machined and has a diameter smaller than the outer diameter of the middle shell 6 and which is provided with a groove for receiving an O-ring. The protrusion of the front end of the middle shell 6 and the O-ring thereon correspond to a shaft, the rear end of the middle shell 6 corresponds to a hole, and an interference fit is formed between the shaft holes. Preferably, the outer diameter of the middle case is gradually reduced after a distance of 1/3 of the length of the middle case from the front to the rear from the rear end of the front case 5. More preferably, the outer diameter of the middle case is gradually reduced after a distance of 1/2 of the length of the middle case from the front to the rear from the rear end of the front case 5. The front shell and the middle shell are mainly made of aluminum alloy. The appearance shape of the front shell of the ultrasonic transducer provided by the invention is roughly cylindrical, the appearance shape of the middle shell shrinks conically from the cylindrical shape at the front part to the back part, and the cylindrical design is suitable for being held by hands. The ultrasonic transducer provided by the invention is convenient to operate by one hand and completely accords with human engineering.

The invention also provides an ultrasonic surgical instrument comprising the ultrasonic transducer. The front end of the ultrasonic transducer is connected with a handle of an ultrasonic surgical instrument, and the rear end of the ultrasonic transducer is connected with a power supply and an ultrasonic generator. The ultrasonic transducer is removably attached to the ultrasonic surgical instrument.

In the description herein, references to the description of the term "one embodiment," "as illustrated in FIG. …," "for example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described, it is understood that the embodiments are illustrative and not restrictive, and that all equivalent modifications or changes that may be made by those skilled in the art without departing from the spirit and scope of the present invention as disclosed herein are intended to be covered by the appended claims.

Claims (10)

1. An ultrasonic transducer, comprising a front shell (5) and a conductive assembly (100) connected to the front end of the front shell (5), wherein the conductive assembly (100) comprises a generally cylindrical insulating fixed seat (4) with a central through hole, and a first conductive ring (1), a second conductive ring (2) and a third conductive ring (3) axially arranged in parallel at intervals in front of the insulating fixed seat (4), and two annular insulating parts in front of the insulating fixed seat (4) separate the first conductive ring (1), the second conductive ring (2) and the third conductive ring (3);

the rear part of the insulating fixed seat (4) comprises one or more convex bodies (4-1) extending axially backwards, and the one or more convex bodies (4-1) are mounted on the front shell (5) through a connector (10);

the first conducting ring (1) and the second conducting ring (2) are integrally formed with the insulating fixed seat (4) and one or more convex bodies (4-1) and two annular insulating parts on the insulating fixed seat through encapsulation and injection molding, and the first conducting ring (1) and the second conducting ring (2) are tightly wrapped by the two annular insulating parts and are fixed on the insulating fixed seat (4);

the third conductive ring (3) is dimensioned to completely cover the outer surface of the connector (10) and is fixed to the front end of the front shell (5) by interference fit.

2. The ultrasonic transducer according to claim 1, wherein the front end of said front housing (5) comprises a substantially cylindrical boss comprising one or more axially formed receiving slots (5-1), said one or more protrusions (4-1) and said one or more receiving slots (5-1) being matched in shape and interfitting and secured together by said connector (10).

3. The ultrasonic transducer according to claim 2, wherein a plurality of positioning protrusions extend axially from the rear of the first conductive ring (1) and the second conductive ring (2), each of the positioning protrusions is provided with an axial positioning recess inside, the positioning protrusions are matched in shape with and correspondingly embedded in a plurality of positioning through holes in the bottom surface of the insulating holder (4), and electrical contact points are respectively provided on the first conductive ring (1) and the second conductive ring (2).

4. The ultrasonic transducer according to claim 3, wherein the rear portion of the insulating fixing base (4) further extends to form an integrally formed protruding portion (4-2), a hollow recessed portion (4-2-1) is provided inside the protruding portion (4-2), two wire holes are provided at the bottom of the recessed portion (4-2-1), the front ends of the two wire holes are separated by the two annular insulating portions, a recessed groove (5-2) is provided on the boss of the front housing (5), the protruding portion (4-2) matches with the recessed groove (5-2) in shape and position and is inserted into the recessed groove (5-2), the recessed portion (4-2-1) and the bottom surface of the recessed groove (5-2) form a closed space after the protruding portion (4-2) is fastened with the recessed groove (5-2), the bottom surface of the concave groove is also provided with wire through holes, and a first wire (8) and a second wire (9) penetrate through the wire through holes in the concave groove (5-2) and correspondingly penetrate through the two wire through holes in the concave part (4-2-1) to be in contact with electric contact points on the first conductive ring (1) and the second conductive ring (2) so as to form electric connection.

5. The ultrasonic transducer according to claim 4, wherein a recessed groove (5-2) in the front of the front housing (5) and a recessed portion (4-2-1) in the rear of the insulating holder (4) are filled with a gel material for sealing the wire holes of the recessed groove and the two wire holes of the recessed portion, through which the first and second wires pass.

6. The ultrasonic transducer according to claim 1, wherein the side faces of the first conductive ring (1) and the second conductive ring (2) are each provided with a groove, the grooves of the side faces of the first conductive ring (1) and the grooves of the side faces of the second conductive ring (2) matching and fitting together and locking with each other corresponding protrusions integrally formed on the two annular insulating part side faces.

7. The ultrasonic transducer according to claim 6, wherein the groove at the side of the first conductive ring (1) and the groove at the side of the second conductive ring (2) are both annular grooves (1-1, 2-1).

8. The ultrasonic transducer according to claim 1, wherein the front ends of said first and second conductive rings (1, 2) each have one annular groove (1-2,2-2) in the axial direction.

9. The ultrasonic transducer according to claim 1, further comprising a middle shell (6) coaxial with and connected to said front shell (5), wherein a front portion of said middle shell (6) is connected to a rear portion of said front shell (5) by interference fit, an outer diameter of said middle shell (6) abutting at a rear end of said front shell (5) is the same as an outer diameter of a rear end of said front shell (5), and an outer diameter of said middle shell (6) is gradually reduced after a distance from front to rear from a rear end of said front shell (5).

10. An ultrasonic surgical instrument comprising the ultrasonic transducer of any one of claims 1-9.

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