CN117653287A - End sealing element, sheath tube and puncture outfit - Google Patents

Abstract

The end sealing element comprises an upper cover, a radial sealing component, a pressing ring and a lower cover, wherein the radial sealing component and the pressing ring are arranged in a space formed by the upper cover and the lower cover. The upper cover and the lower cover can not move relatively along the axial direction through limiting, and under the combined action of the compression ring, the radial sealing assembly is fixedly arranged in a space formed by the upper cover and the lower cover, so that good sealing performance is ensured. The upper cover and the lower cover are dynamically connected along the cross section direction, relative movement can occur between the upper cover and the lower cover, when the lower cover is connected with an external part, the lower cover keeps fixed when the upper cover moves, static connection between the lower cover and the external part is realized, and good sealing assembly and sealing performance are ensured. The sheath tube and the puncture outfit of the invention comprise the end sealing element of the invention, the installation and removal operation of the end sealing element in the clinical use process is simple, and the dynamic connection design can well ensure the sealing performance in the use process.

Description

End sealing element, sheath tube and puncture outfit

Technical Field

The present invention relates to laparoscopic surgical instruments, and more particularly to an end seal, sheath, and puncture outfit for laparoscopic surgery.

Background

Laparoscopic surgery has been increasingly used, and in order to avoid iatrogenic infections, the amount of disposable puncture outfits (Trocar) used in laparoscopic surgery has also been increasing, and on the basis of guaranteeing the performance, the structure is simplified, the cost is reduced, the performance is improved, and this trend has become the direction of improvement of puncture outfits.

In order to take out large resected tissue from the surgical channel of the penetrator during use, the end seal and the sleeve of the penetrator are typically designed to be removable when large resected tissue is required to be removed, the end seal is removed from the sleeve, and the end seal is mounted to the end of the sleeve after the tissue is removed. In order to ensure the sealing performance of the puncture outfit in the clinical use process, a sealing mechanism needs to be arranged between the end sealing piece and the sleeve so as to ensure the sealing after the end sealing piece and the sleeve are assembled. The end seal and the sleeve can be connected together by pressing up and down, rotating the end face, etc., wherein the connection by rotation is more reliable than the connection by pressing up and down, but when such connection is adopted, the connection or disconnection between the end seal and the sleeve requires a rotational movement at the end face, and therefore, the sealing mechanism between the end seal and the sleeve is easily displaced, resulting in poor sealing performance.

Accordingly, there is a need for further improvements in the manner in which existing end seals are connected to a sleeve.

Disclosure of Invention

In the invention, the upper cover and the lower cover of the end sealing element are in a special design of dynamic connection, the end sealing element can be conveniently installed on or removed from the sleeve by rotating the upper cover, and meanwhile, the lower cover can be kept in a static state in the rotating process, so that a sealing mechanism between the end sealing element and the sleeve is in static connection, relative movement can not occur, and the sealing performance of the puncture outfit is ensured.

The end sealing element is characterized in that the end sealing element 1 comprises an upper cover 11, a radial sealing component 12, a compression ring 13 and a lower cover 14;

A. the radial sealing assembly 12 and the compression ring 13 are arranged in a space formed by the upper cover 11 and the lower cover 14; the outer edge of the corrugated sealing ring 12-6 on the radial sealing assembly 12 is embedded between the sealing edge 14-1 of the lower cover 14 and the compression ring 13 and is compressed by the upper cover 11;

B. the upper cover 11 and the lower cover 14 form a dynamic connection, when the upper cover 11 moves, the lower cover 14 is fixed, the upper cover 11 and the lower cover 14 move relatively, and the connection between the lower cover 14 and other components is ensured not to shift.

The upper cover 11 and the lower cover 14 cannot move relatively in the axial direction through limiting, and under the combined action of the compression ring 13, the radial sealing assembly 12 is fixedly arranged in a space formed by the upper cover 11 and the lower cover 14, so that good sealing performance is ensured. However, the upper cover 11 and the lower cover 14 are dynamically connected along the cross section direction, and the upper cover 11 and the lower cover 14 can perform relative movement, when the lower cover 14 is connected with an external component, such as the lower cover 14 is in sealing connection with the sleeve 2, the upper cover 11 moves, such as the lower cover 14 is in rotating movement, and the lower cover 14 and the sleeve 2 can be kept fixed, so that static connection between the lower cover 14 and the sleeve is realized, and good sealing assembly and sealing performance are ensured.

The upper cover 11 and the lower cover 14 are dynamically connected together by means of concave-convex clamping or sliding blocks and sliding grooves. The upper cover 11 and the lower cover 14 can be dynamically connected in a concave-convex clamping fit mode of the positioning hole and the moving platform, and the relative movement between the upper cover 11 and the lower cover 14 can be realized in a mutual fit mode of sliding blocks and sliding grooves. In practical applications, those skilled in the art may design other ways to implement the dynamic connection between the upper cover 11 and the lower cover 14 according to practical needs, which are not illustrated herein, but do not depart from the scope of the present application.

The lower part of the upper cover 11 is provided with a sliding positioning block 11-1, the lower part of the lower cover 14 is provided with a sliding convex step 14-2, and the sliding positioning block 11-1 slides along the sliding convex step 14-2 to perform relative movement. When the upper cover 11 rotates, the sliding positioning block 11-1 rotates along the sliding convex step 14-2, but the lower cover 14 and the external parts, such as the sleeve 2, can be kept fixed. The dynamic connection mode of the matching of the positioning block and the concave-convex card of the convex steps has simple structure and is very convenient to install.

The radial sealing assembly 12 comprises an upper pressing plate 12-1, a protection sheet 12-2, a positioning plate 12-3, a funnel-shaped sealing ring 12-4, a lower pressing plate 12-5 and a corrugated sealing ring 12-6; after the positioning pins 121-1 on the upper pressing plate 12-1 sequentially pass through the mounting holes 122-1 on the protecting plate 12-2 and the mounting holes 126-1 on the corrugated sealing ring 12-6, the protecting plate 12-2 and the corrugated sealing ring 12-6 are mounted between the upper pressing plate 12-1 and the positioning plate 12-3; after the positioning pin 125-1 on the lower pressure plate 12-5 passes through the mounting hole 124-1 on the funnel-shaped sealing ring 12-4, the funnel-shaped sealing ring 12-4 is fixed between the lower pressure plate 12-5 and the positioning plate 12-3;

A. the upper pressing plate 12-1 and the positioning plate 12-3 are connected together by adopting a concave-convex card matching structure;

B. the lower pressing plate 12-5 and the positioning plate 12-3 are connected together by adopting a concave-convex card matching structure.

Because the upper pressing plate 12-1 and the positioning plate 12-3 are connected together through the concave-convex matching structure, even if the elastic force of the elastic material of the corrugated sealing ring 12-6 acts, the upper pressing plate 12-1 and the positioning plate 12-3 still keep good fixed connection, and the relaxation and the air leakage can not occur. Similarly, the lower pressing plate 12-5 and the positioning plate 12-3 are also connected together by a concave-convex card matching structure, and even if the elastic force of the elastic material of the funnel-shaped sealing ring 12-4 acts, the upper pressing plate 12-1 and the positioning plate 12-3 still keep good fixed connection without loosening and air leakage.

In addition, the connection mode of unsmooth card cooperation structure is more convenient than connection modes such as interference fit are assembled, has not only improved production efficiency, and the connection is more firm moreover, is difficult to relax, gas leakage, has guaranteed better radial seal assembly 12's sealing performance. The concave-convex card is matched, and the assembling process does not need chemical adhesive, so that errors in the operation process are not easy to occur, and the safety is improved. For example, when the adhesive bonding connection mode is selected, the problem of unstable connection caused by uneven application of adhesive is easy to occur.

Further, the radial seal assembly 12 has the following features:

A. at least 2 connecting convex hooks 121-2 connected with the positioning plate 12-3 are arranged on the upper pressing plate 12-1, and the connecting convex hooks 121-2 are provided with wedge-shaped guide surfaces 1212-1 and positioning working surfaces 1212-2;

B. the positioning plate 12-3 is provided with at least 2 connecting grooves 123-1 connected with the upper pressing plate 12-1 and at least 2 connecting convex hooks 123-2 connected with the lower pressing plate 12-5; the connecting convex hook 123-2 is provided with a guide surface 1232-1 and a positioning working surface 1232-2;

C. at least 2 connecting grooves 125-2 connected with the positioning plate 12-3 are formed in the lower pressing plate 12-5;

D. the connecting convex hooks 121-2 on the upper pressing plate 12-1 are embedded in the connecting grooves 123-1 on the positioning plate 12-3 to form a concave-convex clamping structure, so that the upper pressing plate 12-1 and the positioning plate 12-3 are connected together; the connecting convex hooks 123-2 on the positioning plate 12-3 are embedded in the connecting grooves 125-2 on the lower pressing plate 12-5 to form a concave-convex clamping structure, so that the lower pressing plate 12-5 and the positioning plate 12-3 are connected together.

The upper pressing plate 12-1, the lower pressing plate 12-5 and the positioning plate 12-3 are in at least 2 concave-convex clamping fit connection, so that the connection is firmer and more reliable.

Because the wedge-shaped guide surface 1212-1 is provided on the connection male hook 121-2 of the upper press plate 12-1, the connection male hook 121-2 can be conveniently inserted into the connection groove 123-1 of the positioning plate 12-3 during installation. The positioning working surface 1212-2 is further designed on the connecting convex hook 121-2, and after the connecting convex hook 121-2 is embedded into the connecting groove 123-1 on the positioning plate 12-3, the positioning working surface 1212-2 can perform a good positioning function, so that the connecting convex hook 121-2 is effectively prevented from slipping out of the connecting groove 123-1 on the positioning plate 12-3, and the connection firmness is ensured.

Because the guide surface 1232-1 is provided on the connection convex hook 123-2 of the positioning plate 12-3, which is connected to the lower pressing plate 12-5, the connection convex hook 123-2 of the positioning plate 12-3 can be conveniently embedded into the connection groove 125-2 of the lower pressing plate 12-5 to form a concave-convex matching structure during installation. The positioning working surface 1232-2 is further designed on the connecting convex hook 123-2 of the connecting lower pressing plate 12-5 on the positioning plate 12-3, and after the connecting convex hook 123-2 is embedded into the connecting groove 125-2 on the lower pressing plate 12-5, the positioning working surface 1232-2 can effectively prevent the connecting convex hook 123-2 from sliding off from the connecting groove 125-2 on the lower pressing plate 12-5, thereby ensuring the connection firmness.

Preferably, 4 connection hooks 121-2 connected with the positioning plate 12-3 are arranged on the upper pressing plate 12-1; the positioning plate 12-3 is provided with 4 connecting grooves 123-1 connected with the upper pressing plate 12-1 and 4 connecting convex hooks 123-2 connected with the lower pressing plate 12-5; the lower pressure plate 12-5 is provided with 4 connecting grooves 125-2 for connecting the positioning plate 12-3.

The 4-hole positioning design can ensure the connection firmness in all directions, and on the other hand, the 4-hole positioning design and installation process does not need to deliberately select the installation direction, so that the radial seal assembly 12 is convenient to install.

A through hole 123-3 is arranged above the connecting convex hook 123-2 on the positioning plate 12-3. The through hole 123-3 is convenient for demolding, and the surrounding force at the connecting convex hook 123-2 is reduced, so that the connecting convex hook 123-2 slides into the connecting groove 125-2 on the lower pressing plate to form convex-concave clamping fit when the connecting convex hook is convenient to install.

The connecting groove 123-1 of the positioning plate 12-3 is generally provided at the upper end of the inner side of the positioning plate 12-3, and the connecting male hook 123-2 of the positioning plate 12-3 is provided at the lower end of the inner side of the positioning plate 12-3. When in installation, the upper pressing plate 12-1 and the positioning plate 12-3 are connected through the connecting groove 123-1 at the upper part of the positioning plate 12-3; the connection between the lower pressure plate 12-5 and the positioning plate 12-3 is accomplished by a connection male hook 123-2 at the lower part of the positioning plate 12-3. The assembly of the upper platen 12-1 and the lower platen 12-5 during assembly does not interfere with each other, facilitating the assembly of the radial seal assembly 12.

The upper press plate 12-1 is provided with a slit 121-3 for easy installation. Because the slit 121-3 is provided beside the connecting convex hook 121-2 of the upper pressing plate 12-1, the connecting convex hook 121-2 can be deformed moderately during assembly, so that the connecting convex hook 121-2 can slide into and be embedded into the connecting groove 123-1 of the positioning plate conveniently, and the concave-convex card is formed for matching and fixing.

The sheath according to the invention is characterized in that the sheath 102 comprises the end seal 1 according to claim 1.

The sheath 102 comprises the end seal 1 and a sleeve 2, and the end seal 1 and the sleeve 2 are detachably connected together; the lower cover 14 is provided with a sealing convex edge 14-3, the proximal end of the sleeve 2 is provided with a sealing mechanism 21, and the sealing convex edge 14-3 is in static connection with the sealing mechanism 21 and cannot move relatively in the process of connecting or disconnecting the end sealing element 1 and the sleeve 2.

Because the upper cover 11 and the lower cover 14 are dynamically connected, when the sealing convex edge 14-3 on the lower cover 14 is closely attached to the sealing mechanism 21 at the proximal end of the sleeve 2, the sealing performance of the sheath tube 102 can be well ensured by rotating the upper cover 11 to connect the end sealing element 1 to the sleeve 2 or reversely rotating the upper cover 11 to remove the end sealing element 1 from the sleeve 2, the sealing convex edge 14-3 and the sealing mechanism 21 can continuously keep static connection without relative movement.

The sheath 102 further comprises an anti-reverse device 3, and the end seal 1 and the sleeve 2 are detachably connected together through the anti-reverse device 3; the anti-reversion device 3 comprises a lock catch 31 capable of preventing the end sealing member 1 from reversing, and a loosening switch 32 capable of releasing the lock catch 31 from preventing the end sealing member 1 from reversing; depressing the release switch 32 releases the lock catch 31 from restricting the reverse movement of the end seal 1.

The anti-reverse device 3 can play a good locking role through the cooperation of the lock catch 31 and the loosening switch 32, and can effectively prevent the connection between the end sealing piece 1 and the sleeve 2 from being accidentally released due to the rotation action of the surgical instrument in the clinical use process.

Said catches 31 are provided on the proximal side 22 of said sleeve 2; the slack switch 32 is provided on the side 12 of the housing of the end seal 1, the location of the slack switch 32 corresponding to the location of the catch 31. Typically the catch 31 is designed on the proximal side 22 of the sleeve 2 and the release switch 32 is arranged on the side 12 of the housing of the end seal 1 in such a way that unlocking is very easy. Of course, in practical applications, the latch 31 may be disposed on the side 12 of the housing of the end seal 1, the slack switch 32 may be disposed on the side 22 of the proximal end of the sleeve 2, or both the latch 31 and the slack switch 32 may be disposed on the end seal 1 or the sleeve 2, which are not illustrated herein, but do not depart from the scope of the present application.

The end seal 1 is removably mounted on the proximal end of the sleeve 2 by a rotationally-inlaid male-female snap fit or screw-thread arrangement. The end seal 1 may be removably mounted to the proximal end of the sleeve 2 by a rotationally-mounted male-female snap fit or screw-threaded arrangement or other connection, although applicant does not exemplify this, without departing from the scope of the present application.

The puncture outfit 100 of the present invention comprises the sheath 102.

The puncture device 100 comprises a puncture rod 101 and a sheath tube 102, and the size of the working part 1-1 of the puncture rod 101 is matched with the size of the instrument channel 23 of the sheath tube 102.

In use, the working portion 1-1 of the penetrating rod 101 is placed into the instrument channel 23 of the sheath 102, and the working portion 1-1 is used to pierce the abdominal wall and then create a surgical channel.

The end seal 1 of the invention comprises an upper cover 11, a radial seal assembly 12, a compression ring 13 and a lower cover 14, wherein the radial seal assembly 12 and the compression ring 13 are arranged in a space formed by the upper cover 11 and the lower cover 14. The upper cover 11 and the lower cover 14 cannot move relatively in the axial direction through limiting, and under the combined action of the compression ring 13, the radial sealing assembly 12 is fixedly arranged in a space formed by the upper cover 11 and the lower cover 14, so that good sealing performance is ensured. The upper cover 11 and the lower cover 14 are dynamically connected along the cross section direction, the upper cover 11 and the lower cover 14 can perform relative movement, when the lower cover 14 is connected with an external component, such as the lower cover 14 is in sealing connection with the sleeve 2, the upper cover 11 moves, such as the lower cover 14 is in rotary movement, the lower cover 14 can be kept fixed with the sleeve 2, static connection between the lower cover 14 and the sleeve is realized, and good sealing assembly and sealing performance are ensured. The sheath tube of the invention comprises the end sealing element 1 of the invention, when the sealing convex edge 14-3 on the lower cover 14 is closely attached to the sealing mechanism 21 at the proximal end of the sleeve 2, the upper cover 11 is rotated to connect the end sealing element 1 to the sleeve 2, or the upper cover 11 is reversely rotated to remove the end sealing element 1 from the sleeve 2, the sealing convex edge 14-3 and the sealing mechanism 21 can continuously keep static connection without relative movement, and the sealing performance of the sheath tube 102 can be well ensured. The puncture outfit of the invention comprises the sheath tube of the invention, the installation and removal operation of the end sealing element 1 in the clinical use process is simple, and the sealing performance in the use process can be well ensured by the dynamic connection design.

Drawings

FIG. 1 is a schematic perspective view of an end seal of the present invention.

Fig. 1-1 is a front view of fig. 1.

Fig. 1-2 is a cross-sectional view A-A of fig. 1-1.

Fig. 1-3 are exploded views of fig. 1.

Fig. 2 is a schematic perspective view of a radial seal assembly.

Fig. 2-1 is a top view of fig. 2.

Fig. 2-2 is a B-B cross-sectional view of fig. 2-1.

Fig. 2-3 are exploded views of fig. 2.

FIG. 3 is a schematic perspective view of the sheath tube of the present invention.

Fig. 3-1 is a front view of fig. 3.

Fig. 3-2 is a C-C cross-sectional view of fig. 3-1.

Fig. 3-3 is a sectional view at D-D of fig. 3-1.

Fig. 3-4 are enlarged views at E of fig. 3-3.

Fig. 3-5 are schematic illustrations of the structure of fig. 3 with the end seal and sheath separated.

FIG. 4 is a schematic perspective view of the puncture outfit of the present invention.

Fig. 4-1 is a front view of fig. 4.

Fig. 4-2 is a cross-sectional view of F-F of fig. 4-1.

In the above figures:

100 is the puncture outfit of the present invention, 101 is the puncture rod of the puncture outfit of the present invention, and 102 is the sheath of the present invention.

1 is an end seal of the present invention, 2 is a sleeve, and 3 is an anti-reverse device.

11 is the upper cover, 12 is radial seal assembly, 13 is the clamping ring, and 14 is the lower cover.

21 is the sealing mechanism, 22 is the proximal side, and 23 is the instrument channel.

31 is a latch and 32 is a slack switch.

1-1 is the working part of the puncture rod, 11-1 is the sliding positioning block, and 11-2 is the side surface of the shell.

12-1 is an upper pressing plate, 12-2 is a protecting sheet, 12-3 is a locating plate, 12-4 is a funnel-shaped sealing ring, 12-5 is a lower pressing plate, and 12-6 is a corrugated sealing ring.

14-1 is the sealing edge on the lower cover, 14-2 is the sliding convex step, and 14-3 is the sealing convex edge.

121-1 is a locating pin, 121-2 is a connecting convex hook connected with a locating plate on the upper pressing plate, and 121-3 is a crack.

122-1 are mounting holes on the protective sheet.

123-1 is a connecting groove on the positioning plate for connecting the upper pressing plate, 123-2 is a connecting convex hook on the positioning plate for connecting the lower pressing plate, and 123-3 is a through hole.

124-1 are mounting holes on the funnel-shaped seal ring.

125-1 is a positioning pin on the lower pressing plate, 125-2 is a connecting groove on the lower pressing plate for connecting the positioning plate.

126-1 are mounting holes on the bellows seal.

1212-1 is the wedge-shaped guide surface of the connecting male hook of the connecting positioning plate on the upper platen, and 1212-2 is the positioning working surface of the connecting male hook of the connecting positioning plate on the upper platen.

1232-1 is the guiding surface of the connecting convex hook of the connecting lower pressing plate on the positioning plate, and 1232-2 is the positioning working surface of the connecting convex hook of the connecting lower pressing plate on the positioning plate.

Detailed Description

Example 1: the end seal of the present invention

Referring to fig. 1 to 1-3, the end seal of the present embodiment comprises an upper cover 11, a radial seal assembly 12, a pressure ring 13, and a lower cover 14.

The radial sealing assembly 12 and the compression ring 13 are arranged in a space formed by the upper cover 11 and the lower cover 14; the outer edge of the corrugated sealing ring 12-6 on the radial sealing assembly 12 is embedded between the sealing edge 14-1 of the lower cover 14 and the pressing ring 13, and is pressed by the upper cover 11.

The upper cover 11 and the lower cover 14 form a dynamic connection, when the upper cover 11 moves, the lower cover 14 is fixed, the upper cover 11 and the lower cover 14 move relatively, and the connection between the lower cover 14 and other components is ensured not to shift.

Referring to fig. 1-2 and fig. 1-3, in this embodiment, a sliding positioning block 11-1 is disposed at a lower portion of the upper cover 11, a sliding protruding step 14-2 is disposed at a lower portion of the lower cover 14, the sliding protruding step 14-2 is inlaid at an upper portion of the sliding positioning block 11-1, the sliding positioning block 11-1 axially limits the lower cover through the sliding protruding step 14-2, the upper cover 11 and the lower cover 14 cannot move relatively in an axial direction, and under a combined action of the pressure ring 13, the radial sealing assembly 12 is fixedly mounted in a space formed by the upper cover 11 and the lower cover 14 to ensure good sealing performance.

However, the upper cover 11 and the lower cover 14 can slide relatively along the cross section direction, so as to form a dynamic connection. When the lower cover 14 is connected with an external component, for example, the lower cover 14 is tightly attached to the sealing mechanism 21 of the sleeve 2 for sealing connection, the upper cover 11 moves, for example, when rotating, the sliding positioning block 11-1 rotates along the sliding convex step 14-2, but the lower cover 14 can keep fixed with the sealing mechanism 21 of the sleeve 2, so that static connection between the lower cover 14 and the sleeve 2 is realized, and good sealing assembly and sealing performance are ensured.

In this embodiment, the upper cover 11 and the lower cover 14 are dynamically connected by means of the concave-convex engagement between the sliding positioning block 11-1 and the sliding convex step 14-2, which is simple in structure and convenient to install.

In practical applications, the upper cover 11 and the lower cover 14 may also be matched with each other through a sliding block chute to realize the relative movement between the upper cover 11 and the lower cover 14, or a person skilled in the art may design other ways to realize the dynamic connection between the upper cover 11 and the lower cover 14 according to the actual needs, which is not illustrated herein, but does not depart from the protection scope of the present application.

Referring to fig. 2 to 2-3, in the present embodiment, the radial seal assembly 12 includes an upper pressure plate 12-1, a protection plate 12-2, a positioning plate 12-3, a funnel-shaped seal ring 12-4, a lower pressure plate 12-5, and a bellows seal ring 12-6, and reference is made to fig. 1 to 7-2.

The upper pressing plate 12-1 and the positioning plate 12-3 are connected together by adopting a concave-convex card matching structure.

The lower pressing plate 12-5 and the positioning plate 12-3 are connected together by adopting a concave-convex card matching structure.

Referring to fig. 2-2 and 2-3, after the positioning pins 121-1 of the upper platen 12-1 pass through the mounting holes 122-1 of the protective sheet 12-2 and the mounting holes 126-1 of the bellows seal ring 12-6 in sequence, the protective sheet 12-2 and the bellows seal ring 12-6 are mounted between the upper platen 12-1 and the positioning plate 12-3. After the positioning pin 125-1 on the lower pressure plate 12-5 passes through the mounting hole 124-1 on the funnel-shaped sealing ring 12-4, the funnel-shaped sealing ring 12-4 is fixed between the lower pressure plate 12-5 and the positioning plate 12-3.

Referring to fig. 2-3, in this embodiment, 4 connection hooks 121-2 connected to the positioning plate 12-3 are provided on the upper pressing plate 12-1, and the connection hooks 121-2 are provided with a wedge-shaped guiding surface 1212-1 and a positioning working surface 1212-2.

The positioning plate 12-3 is provided with 4 connecting grooves 123-1 connected with the upper pressing plate 12-1 and 4 connecting convex hooks 123-2 connected with the lower pressing plate 12-5; the connecting male hook 123-2 is provided with a guide surface 1232-1 and a positioning working surface 1232-2.

The lower pressure plate 12-5 is provided with 4 connecting grooves 125-2 for connecting the positioning plate 12-3.

Further, the connecting convex hooks 121-2 on the upper pressing plate 12-1 are embedded in the connecting grooves 123-1 on the positioning plate 12-3 to form a concave-convex clamping structure, so that the upper pressing plate 12-1 and the positioning plate 12-3 are connected together; the connecting hooks 123-2 on the positioning plate 12-3 are embedded in the connecting grooves 125-2 on the lower pressing plate 12-5 to form a concave-convex matching structure, so that the lower pressing plate 12-5 and the positioning plate 12-3 are connected together, referring to fig. 2.

Referring to fig. 2-3, since the wedge-shaped guide surface 1212-1 is provided on the coupling male hook 121-2 of the upper press plate 12-1, the coupling male hook 121-2 can be conveniently inserted into the coupling recess 123-1 of the positioning plate 12-3 when installed. The positioning working surface 1212-2 is further designed on the connecting convex hook 121-2, and after the connecting convex hook 121-2 is embedded into the connecting groove 123-1 on the positioning plate 12-3, the positioning working surface 1212-2 can play a good fixing role, so that the connecting convex hook 121-2 is effectively prevented from slipping out of the connecting groove 123-1 on the positioning plate 12-3, and the connection firmness is ensured, as shown in fig. 2.

Because the guide surface 1232-1 is provided on the connection convex hook 123-2 of the positioning plate 12-3, which is connected to the lower pressing plate 12-5, the connection convex hook 123-2 of the positioning plate 12-3 can be conveniently embedded into the connection groove 125-2 of the lower pressing plate 12-5 to form a concave-convex matching structure during installation. The positioning working surface 1232-2 is further designed on the connecting convex hook 123-2 of the connecting lower pressing plate 12-5 on the positioning plate 12-3, and after the connecting convex hook 123-2 is embedded into the connecting groove 125-2 on the lower pressing plate 12-5, the positioning working surface 1232-2 can effectively prevent the connecting convex hook 123-2 from sliding off from the connecting groove 125-2 on the lower pressing plate 12-5, thereby ensuring the connection firmness, referring to fig. 2.

In this embodiment, a design of a concave-convex card fit of 4 connection convex hooks and connection grooves is adopted. The 4-hole positioning design can ensure the connection firmness in all directions, and on the other hand, the 4-hole positioning design and installation process does not need to deliberately select the installation direction, so that the radial seal assembly 12 is convenient to install.

A through hole 123-3 is arranged above the connecting convex hook 123-2 on the positioning plate 12-3. The through hole 123-3 is convenient for demolding, and the surrounding force at the connecting convex hook 123-2 is reduced, so that the connecting convex hook 123-2 slides into the connecting groove 125-2 on the lower pressing plate to form convex-concave clamping fit when the connecting convex hook is convenient to install.

A slit 121-3 for easy installation is provided beside the connection male hook 121-2 of the upper press plate 12-1. During assembly, the connecting convex hooks 121-2 can be deformed moderately, so that the connecting convex hooks 121-2 can conveniently slide into and be embedded into the connecting grooves 123-1 of the positioning plate, and concave-convex card matching and fixing are formed.

The radial seal assembly 12 is convenient to assemble and high in production efficiency; and the elastic force of the sealing ring material can be effectively resisted, the connection is firm, the relaxation and the air leakage are avoided.

In this embodiment, since the upper cover 11 and the lower cover 14 are dynamically connected, the upper cover 11 and the lower cover 14 are axially limited by the matching of the sliding positioning block 11-1 and the sliding convex step 14-2, so that axial movement is prevented, the radial seal assembly 12 is ensured to be effectively fixed in the end seal 1, meanwhile, relative movement in the radial cross section direction is ensured, and when the lower cover 14 is closely matched with the seal mechanism 21 at the end part of the sleeve 2, movement of the upper cover 11 does not cause movement of the lower cover 14, so that movement and displacement of the seal mechanism 21 in the process of removing and installing the end seal 1 from the sheath tube 2 are effectively ensured, and good sealing performance in the use process is ensured.

Example 2: the sheath tube of the present invention

Referring to fig. 3 to 3-5, in this embodiment, the sheath 102 comprises the end seal 1 and sleeve 2 of embodiment 1.

In this embodiment, the end seal 1 and the sleeve 2 are detachably connected together. The lower cover 14 is provided with a sealing convex edge 14-3, the proximal end of the sleeve 2 is provided with a sealing mechanism 21, and the sealing convex edge 14-3 is in static connection with the sealing mechanism 21 and cannot move relatively in the process of connecting or disconnecting the end sealing element 1 and the sleeve 2.

Because the upper cover 11 and the lower cover 14 are dynamically connected, when the sealing convex edge 14-3 on the lower cover 14 is closely attached to the sealing mechanism 21 at the proximal end of the sleeve 2, the sealing convex edge 14-3 can continuously keep static connection with the sealing mechanism 21 when the upper cover 11 is rotated to connect the end sealing element 1 to the sleeve 2 or the upper cover 11 is reversely rotated to remove the end sealing element 1 from the sleeve 2, and the lower cover 14 can keep static without moving, so that the sealing performance of the sheath tube 102 can be well ensured.

Referring to fig. 3-2 to 3-5, in this embodiment, the end seal 1 and the sleeve 2 are detachably connected together by the anti-reverse device 3.

The anti-reversion device 3 comprises a lock catch 31 capable of preventing the end sealing member 1 from reversing, and a loosening switch 32 capable of releasing the lock catch 31 from preventing the end sealing member 1 from reversing; depressing the release switch 32 releases the lock catch 31 from restricting the reverse movement of the end seal 1.

The anti-reverse device 3 can play a good locking role through the cooperation of the lock catch 31 and the loosening switch 32, and can effectively prevent the connection between the end sealing piece 1 and the sleeve 2 from being accidentally released due to the rotation action of the surgical instrument in the clinical use process.

Referring to fig. 3-1 to 3-5, in this embodiment, the catch 31 is provided on the proximal side 22 of the sleeve 2; the slack switch 32 is provided on the side 12 of the housing of the end seal 1, the location of the slack switch 32 corresponding to the location of the catch 31. In this arrangement, the release switch 32 can be unlocked very conveniently by pressing it externally.

Of course, in practical applications, the latch 31 may be disposed on the side 12 of the housing of the end seal 1, the slack switch 32 may be disposed on the side 22 of the proximal end of the sleeve 2, or both the latch 31 and the slack switch 32 may be disposed on the end seal 1 or the sleeve 2, which are not illustrated herein, but do not depart from the scope of the present application.

In this embodiment, the end seal 1 is removably mounted on the proximal end of the sleeve 2 by a rotationally-inlaid male-female snap-fit arrangement. In practice, the end seal 1 may be removably mounted to the proximal end of the sleeve 2 by a threaded structure or other connection, not illustrated herein, but without departing from the scope of the present application.

In the sheath tube of this embodiment, since the end seal member 1 of embodiment 1 is adopted, when the upper cover 11 is rotated to connect the end seal member 1 to the sleeve 2, or the upper cover 11 is reversely rotated to remove the end seal member 1 from the sleeve 2, the sealing flange 14-3 and the sealing mechanism 21 can continuously maintain static connection, and the lower cover 14 can not move, so that the sealing performance of the sheath tube 102 can be well ensured. Moreover, the anti-reverse device 3 is capable of effectively maintaining an effective connection between the end seal 1 and the sleeve 2 without the occurrence of accidental unlocking of the end seal 1 and the sleeve 2 due to the rotational movement of the surgical instrument, and is extremely safe for clinical use.

Example 3: the puncture outfit of the present invention

Referring to fig. 4 to 4-2, in this embodiment, the puncture outfit 100 includes the sheath 102 according to embodiment 2.

Referring to fig. 4 and 4-1, the puncture outfit 100 is composed of a puncture rod 101 and a sheath 102, and the puncture rod 101 is inserted into the sheath 102. The sheath 102 is composed of an end seal 1 and a sleeve 2, the end seal 1 being mounted at the proximal end of the sleeve 2

Referring to fig. 4-2, the working portion 1-1 of the penetrating shaft 101 is sized to match the size of the instrument channel 23 of the sheath 102.

In use, the working portion 1-1 of the penetrating rod 101 is placed into the instrument channel 23 of the sheath 102, and the working portion 1-1 is used to pierce the abdominal wall and then create a surgical channel.

When a large amount of resected tissue is required, the end seal 1 can be removed from the sleeve 2 by rotating the upper cover 11 while pressing the loosening switch 32, and after the tissue is taken out, the end seal 1 can be conveniently reinstalled on the sleeve 2 by rotating the upper cover 11.

In the puncture outfit of the embodiment, the end sealing member 1 adopts a dynamic connection design, so that the lower cover 14 can be fixedly connected with the sealing mechanism 21 in a static state in the removing and installing processes, the sealing mechanism 21 cannot shift due to movement, good sealing performance can be maintained, and the puncture outfit is very convenient to use clinically and good in sealing performance.

It should be noted that the structures disclosed and described herein may be replaced by other structures having the same effect, and that the embodiments described herein are not the only structures for implementing the present invention. Although preferred embodiments of the present invention have been described and illustrated herein, it will be apparent to those skilled in the art that these embodiments are merely illustrative, and that numerous changes, modifications and substitutions can be made herein by one skilled in the art without departing from the invention, and therefore the scope of the invention is to be defined by the spirit and scope of the appended claims.

Claims (14)

1. The end sealing member, its characterized in that end sealing member (1) contain upper cover (11), radial seal subassembly (12), clamping ring (13), lower cover (14), its characterized in that:

A. the radial sealing assembly (12) and the compression ring (13) are arranged in a space formed by the upper cover (11) and the lower cover (14); the outer edge of the corrugated sealing ring (12-6) on the radial sealing assembly (12) is embedded between the sealing edge (14-1) of the lower cover (14) and the compression ring (13), and is compressed by the upper cover (11);

B. the upper cover (11) and the lower cover (14) are dynamically connected, when the upper cover (11) moves, the lower cover (14) is fixed, the upper cover (11) and the lower cover (14) move relatively, and the connection between the lower cover (14) and other parts is guaranteed not to shift.

2. The end seal of claim 1, wherein: the upper cover (11) and the lower cover (14) are dynamically connected together in a concave-convex clamping or sliding block sliding chute mode.

3. The end seal of claim 2, wherein: the lower part of the upper cover (11) is provided with a sliding positioning block (11-1), the lower part of the lower cover (14) is provided with a sliding convex step (14-2), and the sliding positioning block (11-1) slides along the sliding convex step (14-2) to perform relative movement.

4. The end seal of claim 1, wherein: the radial sealing assembly (12) comprises an upper pressing plate (12-1), a protection sheet (12-2), a positioning plate (12-3), a funnel-shaped sealing ring (12-4), a lower pressing plate (12-5) and a corrugated sealing ring (12-6); after the locating pins (121-1) on the upper pressing plate (12-1) sequentially pass through the mounting holes (122-1) on the protecting sheet (12-2) and the mounting holes (126-1) on the corrugated sealing ring (12-6), the protecting sheet (12-2) and the corrugated sealing ring (12-6) are arranged between the upper pressing plate (12-1) and the locating plate (12-3); after a positioning pin (125-1) on the lower pressing plate (12-5) passes through a mounting hole (124-1) on the funnel-shaped sealing ring (12-4), the funnel-shaped sealing ring (12-4) is fixed between the lower pressing plate (12-5) and the positioning plate (12-3);

A. the upper pressing plate (12-1) and the positioning plate (12-3) are connected together by adopting a concave-convex clamping structure;

B. the lower pressing plate (12-5) and the positioning plate (12-3) are connected together by adopting a concave-convex clamping structure.

5. The end seal of claim 4, wherein:

A. at least 2 connecting convex hooks (121-2) connected with the positioning plate (12-3) are arranged on the upper pressing plate (12-1), and the connecting convex hooks (121-2) are provided with wedge-shaped guide surfaces (1212-1) and positioning working surfaces (1212-2);

B. at least 2 connecting grooves (123-1) connected with the upper pressing plate (12-1) and at least 2 connecting convex hooks (123-2) connected with the lower pressing plate (12-5) are arranged on the positioning plate (12-3); the connecting convex hook (123-2) is provided with a guide surface (1232-1) and a positioning working surface (1232-2);

C. at least 2 connecting grooves (125-2) for connecting the positioning plate (12-3) are formed in the lower pressing plate (12-5);

D. the connecting convex hooks (121-2) on the upper pressing plate (12-1) are embedded in the connecting grooves (123-1) on the positioning plate (12-3) to form a concave-convex clamping structure, and the upper pressing plate (12-1) is connected with the positioning plate (12-3); the connecting convex hooks (123-2) on the positioning plate (12-3) are embedded in the connecting grooves (125-2) on the lower pressing plate (12-5) to form a concave-convex clamping structure, and the lower pressing plate (12-5) and the positioning plate (12-3) are connected together.

6. The end seal of claim 5, wherein: 4 connecting convex hooks (121-2) connected with the positioning plate (12-3) are arranged on the upper pressing plate (12-1); the positioning plate (12-3) is provided with 4 connecting grooves (123-1) connected with the upper pressing plate (12-1) and 4 connecting convex hooks (123-2) connected with the lower pressing plate (12-5); 4 connecting grooves (125-2) connected with the positioning plate (12-3) are formed in the lower pressing plate (12-5).

7. The end seal of claim 5, wherein: a through hole (123-3) is arranged above the connecting convex hook (123-2) on the positioning plate (12-3).

8. The end seal of claim 4, wherein: the upper pressing plate (12-1) is provided with a crack (121-3) which is convenient to install.

9. Sheath, characterized in that the sheath (102) comprises an end seal (1) according to claim 1.

10. The sheath according to claim 9, wherein: the sheath (102) comprises the end sealing element (1) and a sleeve (2), and the end sealing element (1) and the sleeve (2) are detachably connected together; the lower cover (14) is provided with a sealing convex edge (14-3), the proximal end of the sleeve (2) is provided with a sealing mechanism (21), and the sealing convex edge (14-3) is in static connection with the sealing mechanism (21) in the process of connecting or disconnecting the end sealing piece (1) and the sleeve (2) without relative movement.

11. The sheath according to claim 10, wherein: the sheath (102) also comprises an anti-reversion device (3), and the end sealing piece (1) and the sleeve (2) are detachably connected together through the anti-reversion device (3); the anti-reversion device (3) comprises a lock catch (31) capable of preventing the end sealing piece (1) from reversing, and a loosening switch (32) capable of releasing the lock catch (31) from preventing the end sealing piece (1) from reversing; pressing the release switch (32) releases the restriction of the reverse movement of the end seal (1) by the lock catch (31).

12. The sheath according to claim 11, wherein: the lock catch (31) is arranged on the side surface (22) of the proximal end of the sleeve (2); the loosening switch (32) is arranged on the side face (12) of the shell of the end sealing piece (1), and the position of the loosening switch 32 corresponds to the position of the lock catch 31.

13. The sheath according to claim 11, wherein: the end seal (1) is detachably mounted on the proximal end of the sleeve (2) by a rotationally embedded male-female snap fit or screw thread.

14. A puncture outfit, characterized in that the puncture outfit (100) comprises the sheath (102) according to claim 9.