Transducer shell for ultrasonic scalpel

Abstract

The utility model discloses a transducer shell for ultrasonic scalpel, including front shell, middle shell and back shell, middle shell is connected between the front shell and back shell, wherein the front shell and back shell are both made of hard plastic material, the middle shell is made of flexible plastic material or silica gel material, the back shell is made of flexible plastic material or silica gel material, and the back shell is made of flexible plastic material or silica gel material. The hardness of the front shell and the hardness of the rear shell are both larger than the hardness of the middle shell. Therefore, an elastic component does not need to be arranged when the transducer is installed, the overall structure of the transducer shell is simpler, the production and assembly processes are more convenient and fast, the overall weight of the transducer shell can be greatly reduced, and the production cost is reduced. The overall weight of the transducer assembly and the weight of the ultrasonic scalpel handle provided with the transducer assembly are correspondingly reduced, the hand operation burden of an operation operator is relieved, and implementation of a fine operation and a long-time complex operation is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of ultrasonic scalpel manufacturing, specifically relates to a transducer shell for ultrasonic scalpel. BACKGROUND

[0002] Ultrasound scalpel (also known as ultrasonic knife or ultrasonic hemostatic knife) is an advanced medical equipment, which is widely used in surgical operation. Its working principle is based on high-frequency ultrasonic vibration, which can accurately cut the tissue and reduce bleeding at the same time, and is an indispensable tool in modern minimally invasive surgery. The core part of the ultrasonic scalpel is the transducer, which can convert electrical energy into mechanical energy to produce high-frequency vibration (usually around 55,000 Hz), and the high-frequency vibration is transmitted to the operation site through a special knife head, so that the knife head can cut the tissue gently and accurately. The ultrasonic scalpel not only can cut the tissue, but also has the function of coagulating blood. During the cutting process, the high-frequency vibration of the knife head can make the blood vessels close, so as to reduce bleeding.

[0003] The transducer is usually assembled with the transducer shell to form a transducer assembly, and is integrally installed in the handle shell of the ultrasonic scalpel, wherein the amplitude rod assembly of the transducer is used to produce vibration, and the transducer shell is used to protect the amplitude rod assembly, and the rotation of the amplitude rod assembly can be realized by rotating the transducer shell, that is, the transducer shell and the amplitude rod assembly are relatively fixed.

[0004] In the existing ultrasonic scalpel, the transducer shell is usually made of metal. Because the metal shell is hard, a plurality of elastic components need to be arranged between the metal shell and the amplitude rod assembly to reduce the interference of the metal shell on the vibration of the amplitude rod assembly. However, the metal shell not only has relatively high manufacturing cost, but also increases the overall weight of the ultrasonic scalpel, which affects the operation to some extent. TECHNICAL FIELD

[0005] The utility model aims at providing a transducer shell for ultrasonic scalpel to solve one or more problems in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme of: a transducer shell for ultrasonic scalpel, the transducer shell comprises a front shell, a middle shell and a rear shell, the middle shell is connected between the front shell and the rear shell, wherein the front shell and the rear shell are made of hard plastic material, the middle shell is made of flexible plastic material or silicone or rubber material, the hardness of the front shell and the hardness of the rear shell are both greater than the hardness of the middle shell.

[0007] Preferably, the transducer housing further comprises an electrically conductive plate fixed to the rear portion of the rear shell, the middle shell and the front shell are sealingly connected between the middle shell and the front shell, between the middle shell and the rear shell, and between the electrically conductive plate and the rear shell, so that the electrically conductive plate, the rear shell, the middle shell and the front shell form a receiving cavity with a front opening.

[0008] In some embodiments, the front shell, the middle shell and the rear shell are hollow, the front shell is sleeved on the front portion of the middle shell, and the inner circumferential cavity wall of the front shell is sealingly arranged between the outer circumferential wall of the middle shell; the rear portion of the middle shell is sleeved on the front portion of the rear shell, and the outer circumferential wall of the rear shell is sealingly arranged between the inner circumferential cavity wall of the middle shell; the electrically conductive plate is fixedly arranged on the rear portion of the rear shell and sealingly arranged with the rear end surface of the rear shell.

[0009] In some embodiments, the middle shell is integrally formed on one of the front shell and the rear shell, and a sealing adhesive layer is arranged between the other one of the front shell and the rear shell and the middle shell to achieve mutual fixation and sealing;

[0010] Alternatively, a sealing adhesive layer is arranged between the inner cavity wall of the front shell and the outer circumferential wall of the middle shell, and between the outer circumferential wall of the rear shell and the inner cavity wall of the middle shell to achieve mutual fixation and sealing.

[0011] In some embodiments, the front portion of the middle shell is integrally formed in the inner cavity of the front shell, and the cross section of at least part of the inner cavity of the front shell is the same as at least part of the cross section of the middle shell and is non-circular.

[0012] In some embodiments, the front portion of the front shell is provided with a limiting portion in the inner cavity of the front shell, and a through hole penetrating in the front-rear direction is formed in the limiting portion.

[0013] In some embodiments, the electrically conductive plate is provided with a through hole communicating with the receiving cavity, and the through hole is covered with a waterproof and breathable film.

[0014] In some embodiments, the electrically conductive plate comprises a plate body and an electrically conductive member fixed to the plate body, the through hole is formed in the plate body and penetrates the plate body in the front-rear direction, the waterproof and breathable film is fixed to the plate body and covers the through hole, and the electrically conductive member and the through hole do not overlap each other.

[0015] In some embodiments, the electrically conductive member comprises a first electrically conductive portion and a second electrically conductive portion arranged to be insulated from each other, the first electrically conductive portion is annular and annularly arranged on the outer circumferential portion of the second electrically conductive portion, and the through hole is arranged in two or more than two with intervals, and the through hole is located between the first electrically conductive portion and the second electrically conductive portion on the plate body.

[0016] In some embodiments, the plate has two or more perforations, and each perforation is covered with a waterproof and breathable membrane on its front side, with the circumferential edge of the waterproof and breathable membrane being sealed to the front end face of the plate.

[0017] Due to the application of the above technical solution, this utility model has the following advantages: The transducer housing for the ultrasonic scalpel provided in this utility model embodiment is made of hard plastic material for both the front and rear shells, and the middle shell is made of flexible plastic material, silicone or rubber material and connected between the front and rear shells. This not only eliminates the need for elastic components when installing the transducer, making the overall structure of the transducer housing simpler and the production and assembly process more convenient, but also significantly reduces the overall weight of the transducer housing. Consequently, the overall weight of the transducer assembly and the weight of the ultrasonic scalpel handle with the transducer assembly installed are reduced, alleviating the hand operation burden of the surgeon and facilitating the implementation of delicate and long-term complex surgeries. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the transducer housing according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 An exploded view of the transducer housing structure;

[0021] Figure 3 for Figure 1 A schematic diagram of the overall structure of the transducer assembly formed by the transducer housing and the transducer being installed together;

[0022] Figure 4 for Figure 3 A front view schematic diagram of the transducer assembly;

[0023] Figure 5 For along Figure 4 Schematic diagram of the cross-sectional structure along the middle AA direction;

[0024] Figure 6 for Figure 3 A schematic diagram of the transducer assembly from the left;

[0025] Figure 7 for Figure 3Fig. 1 is a structural exploded schematic view of a transducer assembly of the present application;

[0026] In the above drawings:

[0027] 1. front shell; 11, limiting portion; 12, positioning portion;

[0028] 2. middle shell; 21, first cylinder; 21a, fitting portion; 22, second cylinder; 22a, cylinder body; 22b, connecting portion; 23, third cylinder;

[0029] 3. rear shell; 31, mounting cylinder portion; 31a, annular protrusion; 31b, avoiding groove; 32, end cover portion;

[0030] 4. conductive plate; 41, plate body; 41a, connecting hole; 41b, through hole; 42, waterproof and breathable film; 43, conductive member; 43a, first conductive portion; 43b, second conductive portion;

[0031] 5. transducer; 51, flange plate; 52, rear portion of amplitude-varying rod; 53, front portion of amplitude-varying rod; 53a, connecting screw;

[0032] 6. conductive wire;

[0033] 10. transducer shell. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present application will be described in detail below with reference to the drawings. It should be noted that the description of the embodiments is intended to help understand the present application, but does not constitute a limitation of the present application.

[0035] It should be noted that the following description of the front-rear direction is based on the direction observed by the operator when the ultrasonic scalpel is used for surgical operation, and is only used to clearly describe the relative position relationship of the components in the transducer shell and the transducer assembly.

[0036] Referring to Figures 3 to 7The transducer assembly shown, which includes a transducer 5 and a transducer shell 10 arranged relatively fixedly, the transducer 5 includes a front part 53 of a variable amplitude rod, a flange plate 51 and a rear part 52 of the variable amplitude rod arranged in sequence from front to back along the axial direction, the outer diameter of the flange plate 51 is greater than the outer diameter of the rear part 52 of the variable amplitude rod and the outer diameter of the front part 53 of the variable amplitude rod, the front end of the front part 53 of the variable amplitude rod is provided with a connecting screw 53a for connecting with the blade rod of the ultrasonic surgical knife to transmit the vibration of the transducer 5 to the blade rod for surgical operation; the rear part 52 of the variable amplitude rod has the core components and circuit elements of the transducer 5, the transducer shell 10 is mainly used to enclose the rear part 52 of the variable amplitude rod and other structures installed thereon therein and is fixed with the transducer 5, and the installation of the transducer assembly in the handle shell of the ultrasonic surgical knife is realized through the connection between the transducer shell 10 and the handle shell of the ultrasonic surgical knife.

[0037] Referring to Figures 1 to 7 As shown, the transducer shell 10 includes a front shell 1, a middle shell 2 and a rear shell 3, the middle shell 2 is connected between the front shell 1 and the rear shell 3, wherein the front shell 1 and the rear shell 3 are both made of hard plastic material, the middle shell 2 is made of flexible plastic material or silicone material or rubber material, and the hardness of the front shell 1 and the hardness of the rear shell 3 are both greater than the hardness of the middle shell 2. It needs to be declared that here, the front shell 1, the middle shell 2 and the rear shell 3 are all formed by using the existing materials in the prior art. When the transducer 5 is assembled to form the transducer assembly, the rear part 52 of the variable amplitude rod of the transducer 5 is accommodated in the transducer shell 10, and the front part 53 of the variable amplitude rod protrudes in front of the transducer shell 10, at the same time, the front shell 1 is located at the front of the transducer 5 and close to the front part 53 of the variable amplitude rod, and the rear shell 3 is located at the rear of the transducer 5.

[0038] In this way, on the one hand, compared with the existing transducer assembly with an integral metal shell, the overall weight of the transducer shell 10 is greatly reduced, so that the overall weight of the transducer assembly and the weight of the handle of the ultrasonic surgical knife installed with the transducer assembly are both reduced accordingly, which reduces the hand operation burden of the operator and is beneficial to the implementation of fine surgery and long-time complex surgery; on the other hand, in the transducer shell 10, the middle shell 2 made of flexible and deformable material is connected between the front shell 1 and the rear shell 3, when the transducer 5 is assembled to form the transducer assembly, the connection between the front shell 1 and the rear shell 3 is a flexible connection, so that the vibration between the front shell 1 and the rear shell 3 can be fully buffered, so that the rear shell 3 has little effect on the vibration of the front part 53 of the variable amplitude rod, so that it is not necessary to set multiple elastic components to reduce the effect of the transducer shell 10 on the vibration of the front part 53 of the variable amplitude rod, so that the whole structure of the transducer shell 10 is simpler and the production and assembly process is more convenient.

[0039] Referring to the drawings, the transducer shell 10 further comprises an electrically conductive plate 4 fixedly arranged at the rear of the rear shell 3. In the transducer shell 10, the middle shell 2 and the front shell 1, the middle shell 2 and the rear shell 3, and the electrically conductive plate 4 and the rear shell 3 are sealingly connected, so that the electrically conductive plate 4, the rear shell 3, the middle shell 2 and the front shell 1 form a containing cavity with a front opening. When the transducer shell 10 is assembled with the transducer 5, the rear part 52 of the amplitude rod is entirely located in the containing cavity, the front part 53 of the amplitude rod extends out of the front opening of the containing cavity to the front of the transducer shell 10, and the flange plate 51 is located in the containing cavity and cooperates with the inner side cavity wall of the front shell 1 or the inner side cavity wall of the front part of the middle shell 2, so that the electrically conductive plate 4, the rear shell 3, the middle shell 2, the front shell 1 and the flange plate 51 form a sealed chamber, and the rear part 52 of the amplitude rod is accommodated in the sealed space and electrically connected with the electrically conductive plate 4.

[0040] Referring to the drawings, Figures 1 to 7 In the transducer shell 10 of the embodiment, the middle shell 2 has a hollow cavity extending through in the axial direction, the front shell 1 is sleeved on the front part of the middle shell 2, and the inner side circumferential cavity wall of the front shell 1 is sealingly arranged between the outer side circumferential wall of the middle shell 2; the rear part of the middle shell 2 is sleeved on the front part of the rear shell 3, and the outer side circumferential wall of the rear shell 3 is sealingly arranged between the inner side circumferential cavity wall of the middle shell 2; the electrically conductive plate 4 is fixedly arranged at the rear of the rear shell 3, and the electrically conductive plate 4 is sealingly arranged with the rear end face of the rear shell 3.

[0041] In the embodiment, the middle shell 2 is a flexible pipe made of flexible plastic material, and the front shell 1 and the rear shell 3 are made of hard plastic material. The middle shell 2, the front shell 1 and the rear shell 3 are made of materials in the prior art, the material of the middle shell 2 is mainly selected from TPU and TPE, and has a certain flexibility; the materials of the front shell 1 and the rear shell 3 are mainly selected from PC (polycarbonate), ABS (acrylonitrile-butadiene-styrene plastic), PI (polyimide), PA (polyamide), PMMA (polymethyl methacrylate), POM (polyoxymethylene) and PTFE (polytetrafluoroethylene). The middle shell 2 can be integrally arranged on one of the front shell 1 and the rear shell 3, and a sealing adhesive layer is arranged between the other one of the front shell 1 and the rear shell 3 and the middle shell 2, and the sealing adhesive layer is used to realize mutual fixation and sealing connection; or the middle shell 2, the front shell 1 and the rear shell 3 are respectively fixed and sealed with each other by the sealing adhesive layer, that is, the sealing adhesive layers are respectively arranged between the inner side cavity wall of the front shell 1 and the outer side circumferential wall of the middle shell 2 and between the outer side circumferential wall of the rear shell 3 and the inner side cavity wall of the middle shell 2 to realize mutual fixation and sealing. In the embodiment, the front part of the middle shell 2 is integrally formed on the front shell 1, that is, the middle shell 2 and the front shell 1 form an integral component and are assembled with the transducer 5 and the rear shell 3, so that the assembly is convenient and the reliability of the sealing connection between the front shell 1 and the middle shell 2 is ensured.

[0042] The middle shell 2 has a first barrel 21, a second barrel 22 and a third barrel 23 connected in sequence from front to back, the front shell 1 is fitted on the outer side of the first barrel 21, and the first barrel 21 is fitted on the flange plate 51, the cross section of the flange plate 51 is non-circular, specifically can be set as a polygon, the cross section of at least part of the first barrel 21, the cross section of at least part of the inner cavity of the front shell 1 and the cross section of the flange plate 51 are the same, which makes the front shell 1, the middle shell 2 and the flange plate 51 fixed in the circumferential direction after being fitted, avoiding relative rotation between each other, so that the transducer 5 can rotate synchronously when the transducer shell 10 rotates.

[0043] Here, the rear part of the front shell 1 is also provided with a plurality of positioning parts 12, which are specifically positioning grooves communicating with the inner cavity of the front shell 1, and the outer side of the first barrel 21 is also provided with a fitting part 21a, which protrudes outward from the outer side wall of the first barrel 21 and can be inserted into the plurality of positioning parts 12 one by one, which makes the combination between the front shell 1 and the middle shell 2 more stable and reliable.

[0044] The front part of the front shell 1 is also provided with a limiting part 11, which has a through hole for the front part 53 of the amplitude bar to pass axially, which also constitutes the front opening of the accommodating cavity of the transducer shell 10. The limiting part 11 is located in the inner cavity of the front shell 1 and the flange plate 51 is located behind the limiting part 11, and the limiting of the transducer 5 and the transducer shell in the axial direction is realized by the cooperation between the limiting part 11 and the flange plate 51. The end face between the limiting part 11 and the flange plate 51 is also provided with sealing glue, so that the relative fixation and sealing between the flange plate 51 and the limiting part 11 of the front shell 1 is further realized.

[0045] The front part of the rear shell 3 is fitted into the inner cavity of the third barrel 23, here, the inner cavity of the third barrel 23 is specifically set as a circular cross section, the second barrel 22 has a barrel body 22a and a connecting part 22b, the barrel body 22a extends backward from the rear part of the first barrel 21, the inner cavity of the barrel body 22a and the inner cavity of the first barrel 21 have the same cross section shape, and the size gradually decreases from front to back, which makes the middle shell 2 more easily shaped when molded; the connecting part 22b is connected between the third barrel 23 and the barrel body 22a, and the connecting part 22b is conical with the front small and the rear large. Of course, in other embodiments, the second barrel 22 can also be set as other shapes, for example, the front inner cavity of the barrel body 22a is the same as the cross section shape of the inner cavity of the first barrel 21, and the rear inner cavity is a circular shape with gradually decreasing diameter, etc.

[0046] The rear shell 3 comprises a mounting cylinder portion 31 and an end cover portion 32, the outer diameter of the end cover portion 32 is larger than that of the mounting cylinder portion 31, the rear portion of the middle shell 2 is fitted on the outer side of the mounting cylinder portion 31, and the conductive plate 4 is fixedly connected to the rear end face of the mounting cylinder portion 31. A plurality of annular ribs 31a are arranged on the outer side of the mounting cylinder portion 31 and spaced along the axial direction. When the mounting cylinder portion 31 is inserted into the inner cavity of the connecting portion 22b, the annular ribs 31a are fitted between the connecting portion 22b and the circumferential cavity wall, which not only makes the connection between the two more compact, but also allows the sealing adhesive layer to be accommodated between the adjacent two annular ribs 31a, further improving the sealing performance between the two.

[0047] In the embodiment, referring to Figure 2 With Figure 7 As shown, the conductive plate 4 is further provided with a through hole 41b in communication with the accommodating cavity, and the through hole 41b is covered with a waterproof and breathable film 42. In this way, after the transducer shell 10 and the transducer 5 are assembled to form a transducer assembly, when the transducer assembly is sterilized, the waterproof and breathable film 42 can make the sealed cavity on the transducer assembly have the characteristics of water isolation and air flow communication. When vacuumizing, the middle shell 2 will not expand outward under the action of pressure due to the pressure difference between the inside and outside of the sealed cavity, avoiding deformation of the transducer shell 10 and loss of protection of the rear portion 52 of the amplitude rod, so that the transducer assembly and the transducer shell 10 can be used for a long time.

[0048] Specifically, the conductive plate 4 comprises a plate body 41, which can be integrally provided with the rear shell 3, or fixedly connected to the rear end portion of the rear shell 3 and sealingly connected to the rear end face of the rear shell 3 as in the embodiment. The through hole 41b is opened on the plate body 41 and penetrates the plate body 41 along the thickness direction, and the waterproof and breathable film 42 is fixed on the front end face of the plate body 41 and covers the front side of the through hole 41b.

[0049] The conductive plate 4 further comprises a conductive part 43 for electrically connecting with an external power connecting element, so that the conductive part 43 can maintain electrical connection with the power connecting element when the transducer assembly is rotated to any angle around the axis thereof. Here, the conductive part 43 is in the form of a thin plate, which is fixedly arranged on the rear end portion of the plate body 41 and the rear end face thereof is flush with the rear end face of the plate body 41. Specifically, the conductive part 43 comprises a first conductive portion 43a and a second conductive portion 43b which are arranged to be insulated from each other, the first conductive portion 43a is in the form of a ring, and the second conductive portion 43b is in the form of a ring or a disc as shown in the embodiment, and the first conductive portion 43a is coaxially arranged on the circumferential outer side of the second conductive portion 43b.

[0050] The positions of the perforations 41b on the plate body 41 do not overlap with the conductive member 43, that is, the perforations 41b on the plate body 41 avoid the positions of the conductive member 43. In this embodiment, two or more perforations 41b are provided on the plate body 41, and each of the perforations 41b is covered with a waterproof and breathable film 42, and the circumferential edges of all the waterproof and breathable films 42 are sealingly connected to the front end face of the plate body 41. Here, the two perforations 41b are arranged at intervals and located between the first conductive portion 43a and the second conductive portion 43b.

[0051] In this embodiment, the plate body 41 of the conductive plate 4 is specifically a PCB plate, which has a disc shape as a whole, and a plurality of connecting holes 41a are arranged at intervals on the outer circumferential portion thereof, and a plurality of positioning protrusions 33 are correspondingly arranged on the rear end portion of the rear shell 3. When the conductive plate 4 is connected to the rear end portion of the rear shell 3, sealing glue is first applied between the front side faces of the conductive plate 4, and then the plurality of connecting holes 41a are correspondingly matched with the plurality of positioning protrusions 33, so that the conductive plate 4 is correspondingly positioned with the rear shell 3, and the front side faces of the conductive plate 4 are adhered and fixed to the rear end face of the rear shell 3 through the sealing glue, so that the conductive plate 4 is fixed to the rear shell 3 and sealingly connected with the rear shell 3, thereby sealing the rear end portion of the rear shell 3.

[0052] The rear shell 3 is also provided with two avoiding grooves 31b extending through in the axial direction, and the rear portion 52 of the amplitude rod of the transducer 5 is electrically connected with the first conductive portion 43a and the second conductive portion 43b of the conductive plate 4 through two conductive wires 6, and the two conductive wires 6 are respectively accommodated in the two avoiding grooves 31b.

[0053] Exemplarily, when the transducer shell 10 is used, the transducer shell 10 can be assembled to form a transducer assembly in cooperation with the transducer 5 in the following manner:

[0054] The front portion 53 of the amplitude rod of the transducer 5 is inserted into the inner cavity of the middle shell 2 from the rear portion of the middle shell 2 and passes through the through hole in the front portion of the front shell 1, so that the middle shell 2 is fitted on the outer circumferential portion of the flange plate 51, and the flange plate 51 is forwardly limited in the axial direction by cooperating with the limiting portion 11; the two conductive wires 6 are respectively inserted into the two avoiding grooves 31b of the rear shell 3, and then sealing glue is arranged on the outer circumferential portion of the rear shell 3, and the front portion of the rear shell 3 is inserted into the inner cavity of the third barrel 23 of the middle shell 2, and the sealing glue solidifies to form a sealing glue layer between the rear shell 3 and the middle shell 2, so that the rear shell 3 and the middle shell 2 are fixed to each other and sealed to each other; the conductive plate 4 is electrically connected with the transducer 5 through the two conductive wires 6, and then the sealing glue is applied on the front end face of the conductive plate 4, and the conductive plate 4 is positioned on the rear end portion of the rear shell 3, so that the conductive plate 4 and the rear shell 3 are mutually sealed and fixedly connected.

[0055] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A transducer housing for an ultrasonic surgical knife, characterized by: The transducer shell comprises a front shell, a middle shell and a rear shell, the middle shell is connected between the front shell and the rear shell, wherein the front shell and the rear shell are made of hard plastic material, the middle shell is made of flexible plastic material or silica gel or rubber material, the hardness of the front shell and the hardness of the rear shell are greater than the hardness of the middle shell.

2. The transducer housing for an ultrasonic surgical knife according to claim 1, characterized in that: The transducer shell further comprises a conductive plate, the conductive plate is fixedly arranged on the rear part of the rear shell, the middle shell and the front shell are sealingly connected between the middle shell and the front shell, the middle shell and the rear shell, and the conductive plate and the rear shell, so that the conductive plate, the rear shell, the middle shell and the front shell form a containing cavity with a front opening.

3. The transducer housing for an ultrasonic surgical knife according to claim 2, characterized in that: The front shell, the middle shell and the rear shell are hollow, the front shell is sleeved on the front part of the middle shell, and the inner circumferential cavity wall of the front shell and the outer circumferential wall of the middle shell are sealingly arranged; the rear part of the middle shell is sleeved on the front part of the rear shell, and the outer circumferential wall of the rear shell and the inner circumferential cavity wall of the middle shell are sealingly arranged; the conductive plate is fixedly arranged on the rear part of the rear shell and sealingly arranged with the rear end face of the rear shell.

4. The ultrasonic surgical blade transducer housing of claim 3, wherein: The middle shell is integrally formed on one of the front shell and the rear shell, and a sealing adhesive layer is arranged between the other of the front shell and the rear shell and the middle shell to realize mutual fixation and sealing. Alternatively, a sealing adhesive layer is arranged between the inner cavity wall of the front shell and the outer circumferential wall of the middle shell, and between the outer circumferential wall of the rear shell and the inner cavity wall of the middle shell to realize mutual fixation and sealing.

5. The ultrasonic surgical blade transducer housing of claim 2, wherein: The front part of the middle shell is integrally formed in the inner cavity of the front shell, and the cross section of at least part of the inner cavity of the front shell and at least part of the cross section of the middle shell are the same and are non-circular.

6. The transducer housing for ultrasonic surgical knives according to claim 2, characterized in that: The front part of the front shell is provided with a limiting part in the inner cavity of the front shell, and a through hole penetrating in the front-rear direction is formed in the limiting part.

7. The ultrasonic surgical blade transducer housing of claim 2, wherein: A through hole is formed in the conductive plate and communicates with the containing cavity, and a waterproof and breathable film covers the through hole.

8. The ultrasonic surgical blade transducer housing of claim 7, wherein: The conductive plate comprises a plate body and a conductive member fixedly arranged on the plate body, the through hole is formed in the plate body and penetrates the plate body in the front-rear direction, the waterproof and breathable film is fixedly arranged on the plate body and covers the through hole, and the conductive member and the through hole do not overlap each other.

9. The ultrasonic surgical blade transducer housing of claim 8, wherein: The conductive member comprises a first conductive part and a second conductive part which are arranged to be insulated from each other, the first conductive part is annular and annularly arranged on the outer circumferential part of the second conductive part, and the through hole is arranged in two or more than two.

10. The transducer housing for an ultrasonic surgical knife of claim 8, wherein: The plate body is provided with two or more than two through holes, and each front side of the through holes is respectively covered with a waterproof and breathable film, and the circumferential edge of the waterproof and breathable film is sealingly connected with the front end face of the plate body.

Images