WO2024066963A1

WO2024066963A1 - Connecting and sealing structure used for ultrasonic knife driving handle

Info

Publication number: WO2024066963A1
Application number: PCT/CN2023/117042
Authority: WO
Inventors: 杨志文; 王小娟; 李岩; 张新岗; 郭双梅
Original assignee: 桐惠(杭州)医疗科技有限公司
Priority date: 2022-09-26
Filing date: 2023-09-05
Publication date: 2024-04-04
Also published as: CN219198113U

Abstract

Provided is a connecting and sealing structure used for an ultrasonic knife driving handle, wherein a multi-section driving handle housing (10) comprises a front driving handle housing (101), a middle driving handle housing (102), and a rear driving handle housing (103) which are successively in communication with each other. An ultrasonic wave generating member (20) is mounted in the front driving handle housing (101) and the middle driving handle housing (102). A water injection member (30) is mounted in the rear driving handle housing (103) and protrudes from the rear driving handle housing. The connecting and sealing structure comprises a first connecting structure (11) arranged between the front driving handle housing (101) and the middle driving handle housing (102), a second connecting structure (21) arranged between the middle driving handle housing (102) and the rear driving handle housing (103), a third connecting structure (31) arranged between the water injection member (30) and the rear driving handle housing (103), and a fourth connecting structure (41) arranged at a communication part between the water injection member (30) and the ultrasonic wave generating member (20). By means of the connecting and sealing structure, the connecting and sealing performance of the ultrasonic knife driving handle is optimized, such that the production efficiency can be effectively improved, and the production and maintenance costs are reduced.

Description

A connection sealing structure for ultrasonic knife drive handle

Technical Field

The utility model relates to an ultrasonic knife driving handle provided with a liquid channel and a water nozzle, in particular to a connection sealing structure applied to the ultrasonic knife driving handle, belonging to the field of medical equipment.

Background technique

An ultrasonic surgical knife system generally consists of an ultrasonic knife main unit and accessories such as a foot-operated excitation switch, a driving handle, and an ultrasonic cutter. The ultrasonic cutter is installed at the front end of the driving handle, which includes a transducer, a wire, and a connector. A foot-operated excitation switch or a manual excitation switch is used to activate the ultrasonic cutter through the transducer in the driving handle. At this time, the ultrasonic knife main unit output system converts electrical energy into mechanical vibration waves of the corresponding resonant frequency through the transducer in the driving handle, and then transmits the mechanical vibration waves to the tip of the ultrasonic cutter, so that the tissue in contact with the tip of the ultrasonic cutter is cut.

Ultrasonic scalpels, as a type of ultrasonic surgical scalpel system, are widely used in surgical instrument operations. In order to achieve the function of rinsing wounds and generating water cavitation during surgery, ultrasonic scalpels in the prior art generally have an external water channel on the driving handle, which is connected to the liquid channel set inside the transducer and ultrasonic cutter. In order to avoid water leakage, short circuit and interference, this type of ultrasonic scalpel driving handle has higher requirements for sealing performance.

When assembling the traditional ultrasonic knife drive handle, the connection between its parts is often connected by welding to achieve a sealing effect. This welding connection method with a sealing effect can make the parts of the drive handle firmly connected and have a certain sealing effect, ensuring the relative balance of the internal environment of the drive handle. However, when using welding technology to achieve the connection and sealing of the drive handle, welding is prone to defects such as spatter, cracks, weld depressions, poor welding forming, incomplete welding, sand holes, etc., and the surface treatment of the parts in the later stage is complicated. At the same time, there is a risk of poor sealing, and the welding process is complicated and the cost is high.

At present, some known non-welded assembled ultrasonic knife driving handles, such as an ultrasonic knife handle and an ultrasonic bone knife (CN114631866A) and an ultrasonic bone knife handle with a button and an ultrasonic bone knife (CN208756077U), all divide the handle shell into two components, which are detachably connected, and a sealing structure such as a sealing ring is provided at the connection, but the sealing position and number are small, and the connection and sealing method of other parts inside the handle shell (such as a transducer, a faucet, etc.) are not fully considered. Therefore, the structure of the driving handle needs to be further improved; and because the transducer is suspended at the end and has no actual contact with the shell, the connection stability is not high, and the insulation and sealing performance also need to be improved.

Summary of the invention

In order to overcome the above-mentioned shortcomings of the prior art, the utility model provides a connection sealing structure applied to the ultrasonic knife drive handle, which can comprehensively optimize the connection and sealing performance of the ultrasonic knife drive handle, effectively improve production efficiency, significantly enhance the sealing effect and practicality, simplify the process and operation, and reduce production and maintenance costs.

The technical solution adopted by the utility model to solve its technical problems is:

A connection sealing structure applied to an ultrasonic knife driving handle, the ultrasonic knife driving handle comprising a multi-section driving handle shell and an ultrasonic generating component and a water injection component arranged inside the multi-section driving handle shell, the water injection component is connected to a liquid channel inside the ultrasonic generating component, the multi-section driving handle shell comprises a front driving handle shell, a middle driving handle shell and a tail driving handle shell which are connected in sequence; the ultrasonic generating component is installed in the front driving handle shell and the middle driving handle shell, and the water injection component is installed in the tail driving handle shell and extends outward;

The connection sealing structure includes a first connection structure arranged between the front driving handle housing and the middle driving handle housing, a second connection structure arranged between the middle driving handle housing and the rear driving handle housing, and a structure, a third connection structure arranged between the water injection component and the tail driving handle shell, and a fourth connection structure arranged at the communication portion between the water injection component and the ultrasonic generating component.

Compared with the prior art, the utility model is a connection sealing structure applied to the ultrasonic knife drive handle, which replaces the original welding structure by setting a first sealing connection component, a second sealing connection component, a third sealing connection component, and a fourth sealing connection component. The connection structure and the sealing structure contained therein complement each other. The connection structure can make the drive handle parts and components firmly connected, and the sealing structure can achieve a sealing effect at the connection between the drive handle parts and components, so that the outside of the drive handle is isolated from the inside, and external liquid or dirt can be effectively prevented from entering the inside of the drive handle to cause adverse effects on the drive handle. These connection sealing components effectively enhance the sealing of the drive handle, reduce the safety risk level caused by poor sealing, and at the same time improve detectability, making it more practical. Designing the multi-section drive handle shell into a three-section structure of the front drive handle shell, the middle drive handle shell and the rear drive handle shell can further simplify the production process and assembly operation, and improve production efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

The utility model is further described below in conjunction with the accompanying drawings and embodiments.

FIG. 1 is a perspective view of an embodiment 1 of the present utility model.

FIG. 2 is an exploded view of an embodiment 1 of the present utility model.

FIG3 is a cross-sectional view of an embodiment 1 of the present utility model.

4a and 4b are three-dimensional views of two front driving handle housings in one embodiment 1 of the utility model.

FIG. 5 is an exploded view of a split isolation assembly in Embodiment 1 of the present invention.

FIG. 6 is an exploded view of an embodiment 2 of the present utility model.

FIG. 7 is a cross-sectional view of an embodiment 2 of the present utility model.

FIG8 is a cross-sectional view of an embodiment 3 of the present utility model.

Description of reference numerals in the figures:

10-multi-stage drive handle housing; 101-front drive handle housing; 102-middle drive handle housing; 103-rear drive handle housing; 1031-wire outlet; 104-sheath; 1041-wire channel; 20-ultrasonic generating component; 201-wire; 2011-knot; 202-limiting boss; 203-liquid channel; 30-water injection component;

11-first connection structure; 111-detachable matching structure I; 12-first sealing structure; 121-sealing groove I; 1211-sealing member I;

21-second connection structure; 211-detachable matching structure II; 22-second sealing structure; 221-sealing groove II; 2211-sealing member II;

31-third connection structure; 311-external thread connection part; 312-limiting shoulder; 313-internal thread member/internal thread part; 32-third sealing structure; 321-sealing groove III; 3211-sealing member III;

41-fourth connecting structure; 411-pipe connecting piece; 42-fourth sealing structure; 421-first sealing assembly; 422-second sealing assembly;

51-fifth connecting structure; 511-external connecting member; 512-internal connecting member; 513-detachable matching structure III; 52-fifth sealing structure; 521-sealing groove IV; 5211-sealing member IV;

61-first circumferential limiting assembly; 611-limiting groove; 612-limiting platform; 613-sealing member; 62-second circumferential limiting assembly; 621-limiting plane; 622-limiting stop platform;

7-axial limit assembly; 71-limiting member; 72-buffer member;

81-isolating piece; 82-isolating assembly; 821-isolating outer cylinder; 822-insulating inner cylinder; 8221-isolating layer.

Detailed ways

In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the following will be combined with The drawings in the embodiments of the utility model clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, but not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

Example 1

Fig. 1 to Fig. 3, Fig. 4a, Fig. 4b and Fig. 5 show the schematic structural diagram of a preferred embodiment 1 of the utility model, in which a connection sealing structure applied to an ultrasonic knife driving handle is shown, wherein the ultrasonic knife driving handle comprises a multi-section driving handle shell 10 and an ultrasonic generating component 20 and a water injection component 30 arranged inside the multi-section driving handle shell 10, the water injection component 30 is connected with a liquid channel 203 inside the ultrasonic generating component 20, and the multi-section driving handle shell 10 comprises a front driving handle shell 101, a middle driving handle shell 102 and a tail driving handle shell 103 which are connected in sequence; the ultrasonic generating component 20 is installed in the front driving handle shell 101 and the middle driving handle shell 102, and the water injection component 30 is installed in the tail driving handle shell 103 and extends outward;

The connection sealing structure includes a first sealing connection component arranged between the front driving handle shell 101 and the middle driving handle shell 102, a second sealing connection component arranged between the middle driving handle shell 102 and the tail driving handle shell 103, a third sealing connection component arranged between the water injection component 30 and the tail driving handle shell 103, and a fourth sealing connection component arranged at the connection position between the water injection component 30 and the ultrasonic generating component 20.

The ultrasonic generating component 20 and the water injection component 30 can be respectively set as an ultrasonic transducer and a water nozzle, or other products with the same specific functions can be selected. The ultrasonic generating component 20 and the water injection component 30 are arranged in the front driving handle housing 101, the middle driving handle housing 102 and the rear driving handle housing 103 of the three-stage driving handle housing. The front driving handle housing 101 is connected to the water nozzle by using the first sealing connection component and the second sealing connection component. The driving handle housing 101, the middle driving handle housing 102 and the tail driving handle housing 103 are sealed and connected in a non-welded manner, and the third sealing connection assembly and the fourth sealing connection assembly are used to effectively seal and connect the water injection component 30 involved in liquid circulation with the tail driving handle housing 103 and the ultrasonic generating component 20. These sealing connection assemblies are complementary designs of connection structure and sealing structure, which not only realize the firm connection between the driving handle parts and components, but also realize the sealing effect at the connection between the driving handle parts and components, so that the outside of the driving handle is isolated from the inside, effectively enhancing the sealing of the driving handle, effectively preventing external liquid or dirt from entering the inside of the driving handle to cause adverse effects on the driving handle, reducing the safety risk level caused by poor sealing, and at the same time achieving the purpose of effectively improving production efficiency and improving detectability.

In a further optional implementation of this embodiment 1, the first sealing connection assembly includes a first connection structure 11 and a first sealing structure 12 used in conjunction with each other;

The first connection structure 11 includes a detachable mating structure I111 arranged at the connection position between the front driving handle shell 101 and the middle driving handle shell 102; the first sealing structure 12 includes a sealing groove I121 on the front driving handle shell 101 or the middle driving handle shell 102, and a sealing member I1211 is installed in the sealing groove.

The front driving handle housing 101 and the middle driving handle housing 102 are firmly connected by the first connecting structure 11 , and the first sealing structure 12 achieves a sealing effect to prevent liquid or dirt from entering the driving handle.

The removable mating structure I111 may include a threaded mating structure, an interference fit structure or a plug-in mating structure, etc., and may also be replaced by a non-removable connection method such as bonding or welding. The sealing member I1211 may be a movable sealing method such as a sealing ring or a sealing pad, and a fixed sealing method such as a sealant is not excluded.

In a further optional implementation of this embodiment 1, the second sealing connection assembly includes a second connection structure 21 and a second sealing structure 22 used in conjunction with each other; the second connection structure 21 includes a A detachable mating structure II211 is disposed at the connection between the middle driving handle housing 102 and the tail driving handle housing 103; the second sealing structure 22 includes a sealing groove II221 on the middle driving handle housing 102 or the tail driving handle housing 103, and a sealing member II2211 is installed in the sealing groove.

The middle driving handle housing 102 and the rear driving handle housing 103 are firmly connected by the second connecting structure 21 , and the second sealing structure 22 enables the two to achieve a sealing effect to prevent liquid or dirt from entering the driving handle.

The removable mating structure II211 may include a threaded mating structure, an interference fit structure or a plug-in mating structure, etc., or may be replaced by a non-removable connection method such as bonding or welding. The sealing member II2211 may be a movable sealing method such as a sealing ring or a sealing pad, and a fixed sealing method such as a sealant is not excluded.

In a further optional implementation of this embodiment 1, the third sealing connection assembly includes a third connection structure 31 and a third sealing structure 32 used in conjunction with each other;

The third connection structure 31 includes an external thread connection portion and a limiting shoulder 312 spaced apart on the water injection member 30. The water injection member 30 passes through the front end opening of the tail driving handle housing 103 and is fixed to the limiting shoulder 312 through the external thread connection portion and the internal thread member 313.

The third sealing structure 32 includes a sealing groove III321 provided in the front end opening of the tail driving handle housing 103 or provided on the end surface of the limiting shaft shoulder 312, and a sealing member III3211 is installed in the sealing groove.

The water injection component 30 is firmly connected to the tail drive handle housing 103 through the third connection structure 31 , and the third sealing structure 32 achieves a sealing effect to prevent liquid or dirt from entering the tail drive handle housing 103 .

The external threaded connection part can be specifically an external threaded shaft, which can also be replaced by a snap connection part or an interference connection part, etc. The internal threaded part 313 can be a nut, or other components that can cooperate with the above external threaded part, or components that can cooperate with the above various alternative connection parts. Movable sealing methods such as sealing rings or sealing pads are not excluded, and fixed sealing methods such as sealants are not excluded.

In a further optional implementation of this embodiment 1, the fourth sealing connection assembly includes a fourth connection structure 41 and a fourth sealing structure 42 used in conjunction with each other;

The fourth connection structure 41 includes a tubular connector 411 which is sleeved on the outside of the connection portion between the water injection component 30 and the ultrasonic generating component 20; the fourth sealing structure 42 includes at least one first sealing component 421 and at least one second sealing component 422 which are respectively arranged between the water injection component 30 and the tubular connector 411 and between the ultrasonic generating component 20 and the tubular connector 411.

The fourth connecting structure 41 ensures that the water injection component 30 is firmly connected to the ultrasonic generating component 20 , and the fourth sealing structure 42 achieves a sealing effect to prevent liquid from flowing out of the water injection component 30 or the ultrasonic generating component 20 and entering the driving handle.

The tubular connector 411 can be a connecting hose or a connecting hard pipe, and a reinforced sealing structure, such as a variable diameter structure or a rough structure, can be provided at the cross section between the water injection component 30 and/or the ultrasonic generating component 20 and the tubular connector 411. The first sealing component 421 and the second sealing component 422 can both adopt a combination of a sealing groove + a sealing component, and the sealing component can be a movable sealing method such as a sealing ring or a sealing pad, and a fixed sealing method such as a sealant is not excluded.

More specifically, the axial installation of the tubular connector 411 can be conveniently positioned at the step structures on the water injection component 30 and the ultrasonic generating component 20 by positioning both ends. Further, a buffer 72 is provided between the tubular connector 411 and the step structure of the ultrasonic generating component 20; preferably, the buffer 72 is arranged inside the isolation layer 8221 of the isolation component 82, and the tubular connector 411 passes through the hole on the isolation layer 8221; further, the outer periphery of the end of the tubular connector 411 located on one side of the water injection component 30 is also arranged inside the outer end of the middle driving handle housing 102 through a support member, and is located at the end of the isolation component 82.

In a further optional implementation of this embodiment 1, the outer end of the tail driving handle housing 103 is provided with a wire outlet 1031, and the wire outlet 1031 is provided with a sheath 104 having a wire channel 1041, and the sheath 104 and the wire outlet 1031 are assembled through a fifth sealing connection component;

The fifth sealing connection assembly includes a first connection structure and a fifth sealing structure 52 used in conjunction with each other; the fifth connection structure 51 includes an external connection member 511 and an internal connection member 512, the connection end of the external connection member 511 and the sheath 104 is provided with a detachable matching structure III513, the external connection member 511 and the wire outlet are detachably connected thereto via the internal connection member 512; the fifth sealing structure 52 includes a sealing groove IV521 on the middle driving handle shell 102 or the tail driving handle shell 103, and a sealing member IV5211 is installed in the sealing groove.

The fifth connection structure 51 ensures that the sheath 104 is firmly connected to the tail drive handle housing 103 , and the fifth sealing structure 52 achieves a sealing effect to prevent dirt from entering the tail drive handle housing 103 through the wire outlet 1031 .

The above-mentioned detachable connection includes the connection between the external connector 511 and the internal connector 512 and the connection between the internal connector 512 and the wire outlet, which can adopt a threaded fitting structure, an interference fit structure or a plug-in fitting structure, etc., and can also be replaced by a non-detachable connection method such as bonding and welding.

The removable matching structure III513 may include a thread matching structure, an interference matching structure or a plug-in matching structure, etc., and may also be replaced by a non-removable connection method such as bonding or welding. The sealing member IV5211 may use a movable sealing method such as a sealing ring or a sealing pad, and a fixed sealing method such as a sealant is not excluded.

In a further optional implementation of this embodiment 1, the wire outlet 1031 includes a hollow boss arranged at the outer end of the tail driving handle shell 103 and a slot opened on the hollow boss; the wire 201 of the ultrasonic generating component 20 is provided with a knot 2011, and the knot 2011 is fixed on the inside of the slot.

By providing a knot 2011 for the wire 201 and fixing it by gluing or the like, it is possible to prevent the wire 201 By setting the uncovering inside the slot, it is possible to prevent the wire 201 from being pulled from the outside, which would cause the wire 201 to move and break.

In a further optional implementation of the present embodiment 1, the wire channel 1041 is arranged at a certain angle to the water injection component 30, and the angle is not less than 20°.

The angle between the wire channel 1041 and the water injection component 30 serves to protect the wire 201 from interference and damage caused by liquid leaking from the water injection component 30 .

In a further optional implementation of the present embodiment 1, a first circumferential limiting assembly 61 is provided between the ultrasonic generating component 20 and the middle driving handle housing 102 and the front driving handle housing 101 respectively;

The first circumferential limiting component 61 includes a limiting groove 611 arranged on the ultrasonic generating component 20 and a limiting platform 612 arranged at the front end of the middle driving handle shell 102. The limiting groove 611 is opened on the limiting boss 202 arranged near the front end of the ultrasonic generating component 20, and the limiting platform 612 is connected with the limiting groove 611 to constrain the relative rotation of the ultrasonic generating component 20; a sealing component 613 is also provided on the ultrasonic generating component 20 between the limiting boss 202 and the limiting platform 612, which is used to prevent liquid from entering the driving handle through the front driving handle shell 101.

In a further optional implementation of the present embodiment 1, an isolating member 81 and an isolating assembly 82 are respectively provided at both ends between the ultrasonic generating member 20 and the middle driving handle housing 102; the isolating member 81 is provided between the limiting boss 202 of the ultrasonic generating member 20 and the middle driving handle housing 102;

The isolation assembly 82 adopts an insulating isolation sleeve, including an insulating outer cylinder 821 and an insulating inner cylinder 822. The insulating outer cylinder 821 is located between the ultrasonic generating component 20 and the middle driving handle shell 102; the insulating inner cylinder 822 is arranged inside the insulating outer cylinder 821, and forms an isolation layer 8221 at its cross section; the isolation layer 8221 is provided with holes for the wire 201 and the far end of the ultrasonic generating component 20 to pass through respectively.

The isolation assembly 82 can be a split structure or an integrated structure, that is, the insulating inner cylinder 822 It is connected to the inside of the isolation outer cylinder 821 , and the isolation layer 8221 belongs to the end surface of the insulation inner cylinder 822 , or the insulation inner cylinder 822 is integrally formed inside the isolation outer cylinder 821 and is separated by the isolation layer 8221 inside the isolation outer cylinder 821 .

Both the isolation member 81 and the isolation assembly 82 are used to separate the ultrasonic generating component 20 from the multi-stage driving handle shell 10 to prevent conduction, wherein the far end length of the insulating isolation sleeve is preferably at least not shorter than the farthest end of the positive electrode sheet of the ultrasonic generating component 20 to prevent short circuit or open circuit.

In terms of the specific positioning of the isolation component 82, a boss/groove structure can be provided on the front driving handle housing 101, which cooperates with the groove/boss structure provided on the isolation component 82 to fix the isolation component 82 and prevent the risk of the wire 201 breaking due to its movement. The isolation member 81 can also be designed as an L-shaped cross section to cooperate with the limiting boss 202 fixed on the ultrasonic generating component 20.

Example 2

In another embodiment 2 shown in FIG. 6-FIG . 7 , a connection sealing structure applied to an ultrasonic knife driving handle is provided, which is different from the above-mentioned embodiment 1 in that:

A second circumferential limiting assembly 62 is also provided between the ultrasonic generating component and the middle driving handle shell and the front driving handle shell respectively; the second circumferential limiting assembly 62 includes at least one limiting plane 621 provided on the ultrasonic generating component and at least one limiting stop platform 622 provided in the front driving handle shell, and the limiting stop platform 622 cooperates with the limiting plane 621 to constrain the relative rotation of the ultrasonic generating component.

An axial limiting assembly 7 is provided between the ultrasonic generating component and the middle driving handle shell and the front driving handle shell; the axial limiting assembly 7 includes a limiting member 71 provided on the front driving handle shell or the middle driving handle shell, and the limiting boss of the ultrasonic generating component is axially fixed between the limiting member 71 and the limiting stop 622.

The limit member 71 is connected to the front driving handle shell by threaded connection, or interference fit, welding and other connection methods can be used. The limit member 71 is connected to the front driving handle shell to fix the ultrasonic generating component and cannot move.

In Example 1, this limiting member 71 is not provided, but the end of the middle driving handle shell is used as the limiting member 71 to support the limiting boss of the ultrasonic generating component to achieve fixation.

Example 3

In yet another embodiment 3 shown in FIG8 , a connection sealing structure for an ultrasonic knife driving handle is provided, which is different from the above two embodiments 1 and 2 in the following aspects:

The fifth connection structure of the fifth sealing connection assembly includes an external connection member 511, which is directly and detachably connected to the wire outlet 1031. The detachable connection here can be a threaded fitting structure, an interference fit structure, or a plug-in fitting structure, or can be replaced by a non-detachable connection method such as bonding or welding.

The third connection structure of the third sealing connection assembly includes an external thread connection portion and a limiting shoulder continuously arranged on the water injection member, the water injection member passes through the rear end opening of the tail drive handle housing and is fixed to the internal thread portion 313 at the rear end opening through the external thread connection portion, and is axially limited at the limiting shoulder. The internal thread portion 313 is specifically an internal thread hole arranged in the rear end opening of the tail drive handle housing, and the external thread connection portion can also be replaced by a snap connection portion or an interference connection portion.

The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modifications and equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

A connection sealing structure applied to an ultrasonic knife driving handle, the ultrasonic knife driving handle comprising a multi-section driving handle shell and an ultrasonic generating component and a water injection component arranged inside the multi-section driving handle shell, the water injection component is connected to a liquid channel inside the ultrasonic generating component, and is characterized in that:

The multi-section drive handle housing comprises a front drive handle housing, a middle drive handle housing and a tail drive handle housing which are connected in sequence; an ultrasonic generating component is installed in the front drive handle housing and the middle drive handle housing, and a water injection component is installed in the tail drive handle housing and extends outward;

The connection sealing structure includes a first connection structure arranged between the front driving handle shell and the middle driving handle shell, a second connection structure arranged between the middle driving handle shell and the tail driving handle shell, a third connection structure arranged between the water injection component and the tail driving handle shell, and a fourth connection structure arranged at the connecting portion between the water injection component and the ultrasonic generating component.
According to claim 1, a connection sealing structure applied to an ultrasonic knife drive handle is characterized in that: the connection sealing structure further comprises a first sealing structure disposed between the front drive handle shell and the middle drive handle shell, and cooperates with the first connection structure to form a first sealing connection assembly;

The first connection structure includes a detachable matching structure I arranged at the connection position between the front drive handle shell and the middle drive handle shell; the first sealing structure includes a sealing groove I on the front drive handle shell or the middle drive handle shell, and a sealing member I is installed in the sealing groove.
According to claim 2, a connection sealing structure for an ultrasonic knife drive handle is characterized in that: the connection sealing structure also includes a second sealing structure arranged between the middle drive handle shell and the tail drive handle shell, and is used in conjunction with the second connection structure to form a second sealing connection assembly; the second connection structure includes a detachable matching structure II arranged at the connection position between the middle drive handle shell and the tail drive handle shell; the second sealing structure includes a middle drive handle shell or a tail drive handle shell. A sealing groove II is provided on the movable handle housing, and a sealing member II is installed in the sealing groove.
According to claim 3, a connection sealing structure applied to an ultrasonic knife drive handle is characterized in that: the connection sealing structure further comprises a third sealing structure arranged between the water injection component and the tail drive handle housing, and is used in conjunction with the third connection structure to form a third sealing connection assembly;

The third connection structure includes an external thread connection part and a limiting shoulder arranged at intervals on the water injection member, the water injection member passes through the rear end opening of the tail drive handle shell and is fixed to the limiting shoulder by the external thread connection part and the internal threaded part; or, the third connection structure includes an external thread connection part and a limiting shoulder arranged continuously on the water injection member, the water injection member passes through the rear end opening of the tail drive handle shell and is fixed to the internal thread part at the front end opening by the external thread connection part, and is axially limited at the limiting shoulder;

The third sealing structure comprises a sealing groove III provided in the front end opening of the tail driving handle housing or provided on the end surface of the limiting shaft shoulder, and a sealing member III is installed in the sealing groove.
According to claim 4, a connection sealing structure applied to an ultrasonic knife driving handle is characterized in that: the connection sealing structure further comprises a fourth sealing structure arranged at a portion where the water injection component and the ultrasonic generating component communicate with each other, and is used in conjunction with the fourth connection structure to form a fourth sealing connection assembly;

The fourth connection structure includes a tubular connector that is sleeved on the outside of the connection portion between the water injection component and the ultrasonic generating component; the fourth sealing structure includes at least one first sealing component and at least one second sealing component that are respectively arranged between the water injection component and the tubular connector and between the ultrasonic generating component and the tubular connector.
According to claim 5, a connection sealing structure for an ultrasonic knife drive handle is characterized in that: a wire outlet is provided at the outer end of the tail drive handle housing, a sheath having a wire channel is provided at the wire outlet, and the sheath and the wire outlet are assembled through a fifth sealing connection component;

The fifth sealing connection assembly includes a fifth connection structure and a fifth sealing structure that are used together; the fifth connection structure includes an external connection part, or includes an external connection part and an internal connection part, and the connecting end of the external connection part and the sheath is provided with a detachable matching structure III, and the external connection part is directly detachably connected to the wire outlet or detachably connected to it through the internal connection part; the fifth sealing structure includes a sealing groove IV on the middle driving handle shell or the tail driving handle shell, and a sealing part IV is installed in the sealing groove.
According to claim 6, a connection sealing structure applied to an ultrasonic knife driving handle is characterized in that: the wire outlet includes a hollow boss arranged at the outer end of the tail driving handle shell and a notch opened on the hollow boss; the wire of the ultrasonic generating component is provided with a knot, and the knot is fixed on the inner side of the notch.
According to the connection sealing structure applied to the ultrasonic knife driving handle according to claim 7, it is characterized in that the wire channel and the water injection component are arranged at a certain angle, and the angle is not less than 20°.
According to claim 8, a connection sealing structure for an ultrasonic knife drive handle is characterized in that: a first circumferential limit assembly and a second circumferential limit assembly are respectively provided between the ultrasonic generating component and the middle drive handle shell and the front drive handle shell;

The first circumferential limit assembly includes a limit groove arranged on the ultrasonic generating component and a limit platform arranged at the front end of the middle driving handle shell, the limit groove is arranged on the limit boss arranged near the front end of the ultrasonic generating component, and the limit platform and the limit groove are connected in cooperation to restrict the relative rotation of the ultrasonic generating component; a sealing component is also arranged on the ultrasonic generating component between the limit boss and the limit platform;

The second circumferential limit assembly includes at least one limit plane disposed on the ultrasonic generating component and at least one limit stop platform disposed in the front driving handle housing, the limit stop platform cooperates with the limit plane to restrict the relative rotation of the ultrasonic generating component;

An axial connection is arranged between the ultrasonic generating component and the middle driving handle shell and the front driving handle shell. Limiting assembly; the axial limiting assembly includes a limiting member arranged on the front driving handle shell or the middle driving handle shell, and the limiting boss of the ultrasonic generating component is axially fixed between the limiting member and the limiting stop.
According to claim 9, a connection sealing structure for an ultrasonic knife driving handle is characterized in that: an isolation member and an isolation assembly are respectively provided at both ends between the ultrasonic generating component and the middle driving handle shell; the isolation member is arranged between the limiting boss of the ultrasonic generating component and the middle driving handle shell;

The isolation assembly adopts an insulating isolation sleeve, including an insulating outer cylinder and an insulating inner cylinder. The insulating outer cylinder is located between the ultrasonic generating component and the middle driving handle shell; the insulating inner cylinder is arranged inside the insulating outer cylinder and forms an isolation layer at its cross section; the isolation layer is provided with holes for the wire and the far end of the ultrasonic generating component to pass through respectively.