CN111110325B

CN111110325B - Puncture rod and laparoscope puncture outfit equipped with same

Info

Publication number: CN111110325B
Application number: CN201911371970.1A
Authority: CN
Inventors: 马建民; 周伟绩; 虞芹
Original assignee: Jiangsu Shengna Enterprise Management Co ltd
Current assignee: Jiangsu Shengna Enterprise Management Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2024-08-06
Anticipated expiration: 2039-12-27
Also published as: CN111110325A

Abstract

The application discloses a puncture rod and a laparoscope puncture device provided with the puncture rod, wherein the puncture rod comprises: the rod body is vertically arranged, the rod head is arranged at the lower end of the rod body and is provided with a cutting edge, and the rod seat is arranged at the upper end of the rod body; the rod seat, the rod body and the rod head are respectively provided with an endoscope channel; the pole body is the metal pole, the pole seat comprises the pole seat upper seat body and the pole seat lower seat body of detachable connection, the pole seat upper seat body with the pole body is connected of moulding plastics, the pole head with the pole body is connected of moulding plastics, and the lower part cover of the pole seat lower seat body is in outside the pole body, the upper portion embedding of pole head in the pole body, the surface of pole head with the surface parallel and level of the pole body is arranged. The rod head and the rod body of the puncture rod have high connection strength, the joint is very smooth and seamless, the outer surface is completely flush, the insertion and extraction force of the puncture rod in the puncture sleeve can be reduced, and the possibility that the puncture rod accidentally injures human tissues is reduced.

Description

Puncture rod and laparoscope puncture outfit equipped with same

Technical Field

The application relates to surgical equipment, in particular to a puncture rod and a laparoscopic puncture outfit provided with the puncture rod.

Background

The advent of minimally invasive surgery has led to more and more patients becoming more optimized for radical treatment of lesions. In minimally invasive surgery, pneumoperitoneum is performed in the abdominal cavity of a patient. Establishing pneumoperitoneum is an important link in laparoscopic surgery, and a laparoscopic puncture outfit is a medical instrument used for establishing pneumoperitoneum. Good gas tightness and gas barrier properties are the basis for establishing pneumoperitoneum. CO2 gas is injected into a human body through an air injection valve on the puncture outfit to form pneumoperitoneum.

In order to observe the puncture condition in real time during the puncture operation, and to prevent the puncture rod, particularly the head of the puncture rod, from injuring human tissue by mistake, it is necessary to provide an endoscope (endoscope) extending into the puncture rod. An endoscope used in laparoscopic surgery mainly comprises a wire rod and a lens arranged at the front end of the wire rod. The wiring rod is of a hollow structure, a wire connected with the lens is arranged in the wiring rod, and the rear end of the wire is connected with a computer (or other image processors). The lens at the front end transmits the collected image to the computer at the rear end through the lead in the wiring rod, and the image information in the abdominal cavity of the patient is displayed on the computer in real time.

In practical application, the relative fixation of the endoscope, particularly the wire rod and the puncture rod of the endoscope, is required to be ensured, so that the endoscope is prevented from moving in the puncture process and the in-vivo image can not be accurately and clearly acquired. While the endoscope used in laparoscopic surgery is of standard size, the track bar is very thin. The diameter of the wiring rod is smaller than the diameter of the inner hole of the rod body of the puncture rod, the puncture rod head is used for accommodating the lens at the front end of the endoscope, and the inner space (especially the bottom tip space) is smaller. Therefore, the endoscope wire rod is preferably arranged coaxially with the inner hole of the puncture rod body, because the lower end lens can be ensured to be positioned at the ideal position in the rod head only in this way, and meanwhile, the bending deformation of the wire rod is prevented.

If the connection strength of the puncture rod body and the puncture rod seat and the smoothness of the connection part are to be improved, the puncture rod body and the puncture rod seat are preferably integrally injection-molded. From the above, in the conventional scheme, in order to fix the endoscope, the bore diameter of the rod seat is smaller than that of the rod body, so that the integral injection molding of the rod seat and the rod body can be realized by adopting a downward core pulling (namely, drawing the molding core rod of the injection mold downward), and the demoulding is smooth.

In the conventional scheme, in the case that the stick body and the stick base of the puncture stick adopt the above-mentioned structure, the stick head generally can only adopt a structure which is externally covered at the lower end part of the stick body, because:

1. If the upper end of the club head is embedded in the lower end of the club body, the club body cannot be used as an injection molding insert (in this case, the club body is made of metal), and the club head cannot be injection molded, because the step at the joint of the inner hole of the club seat and the inner hole of the club body can block the upward core pulling of the molding core rod, i.e. the core pulling action cannot be completed by the mold.

2. If the rod body is manufactured independently, the manufactured rod head is fixedly inserted into the lower end part of the rod body, so that the rod head is deformed to influence the puncture performance of the rod head, a gap with a certain size (the gap opening direction is horizontally outwards) is necessarily formed between the rod head and the rod body in a mechanical inserting connection mode, and in actual application, internal tissues of an operated person can be blocked into the gap, and the internal tissues are pulled to cause great damage to the operated person.

Therefore, in the conventional scheme, the club head outer sleeve is fixed at the lower end of the club body. This is because, although a gap exists between the club head and the club body, which is externally covered on the lower end of the club body, the gap is opened upwards, and the possibility that the vertical gap is stuck to the tissue in the human body during use is relatively small, which is the reason why the vertical gap is always the case. Some manufacturers can use an injection molding mode to cover the club head on the periphery of the club body, but the outer surface of the club head protrudes out of the outer surface of the club body, an annular step is formed between the club head and the club head, and the annular step is easy to damage tissues in a patient during puncture operation.

In addition, in the traditional scheme, no matter the club head adopts embedded mounting structure or outsourcing mounting structure, all there is the not high problem of club head and body of rod joint strength. In the use process, the possibility that the club head is detached from the club body theoretically exists, and although the possibility is small, serious medical accidents can be caused once the club head happens.

Disclosure of Invention

The purpose of the application is that: aiming at the problems, the application provides a puncture rod and a laparoscope puncture outfit provided with the puncture rod, the rod head and the rod body of the puncture rod have high connection strength, the joint is very smooth and seamless, the outer surface is completely flush, the insertion and extraction force of the puncture rod in a puncture sleeve can be reduced, and the possibility that the puncture rod accidentally damages human tissues is reduced.

In order to achieve the above purpose, the technical scheme of the application is as follows:

a penetration rod of a laparoscopic penetration device, comprising:

the rod body is arranged vertically,

A rod head with a cutting edge arranged at the lower end of the rod body, and

The rod seat is arranged at the upper end of the rod body;

The rod seat, the rod body and the rod head are respectively provided with an endoscope channel;

The pole body is the metal pole, the pole seat comprises the pole seat upper seat body and the pole seat lower seat body of detachable connection, the pole seat upper seat body with the pole body is connected of moulding plastics, the pole head with the pole body is connected of moulding plastics, and the lower part cover of the pole seat lower seat body is in outside the pole body, the upper portion embedding of pole head in the pole body, the surface of pole head with the surface parallel and level of the pole body is arranged.

On the basis of the technical scheme, the application further comprises the following preferable scheme:

The upper end and the lower end of the rod body are respectively provided with an upper injection molding process hole and a lower injection molding process hole, the rod head is provided with a stopper embedded in the upper injection molding process hole, and the lower seat body of the rod seat is provided with a stopper embedded in the lower injection molding process hole.

The upper seat body of the rod seat comprises an upper seat body through pipe with a vertical through hole, the lower seat body of the rod seat comprises a lower seat body through pipe with a vertical through hole, the upper seat body through pipe and the lower seat body through pipe are coaxially arranged and are communicated up and down, and the aperture of the vertical through hole in the upper seat body through pipe is smaller than the aperture of the vertical through hole in the lower seat body through pipe.

The pipe wall of the lower end part of the upper seat body through pipe is provided with a circular arc incision along the circumferential direction, the lower seat body of the rod seat is hinged with a turnover pressing tongue, and the turnover pressing tongue comprises:

an actuating end exposed from the outer surface of the stem block, and

The working end of the endoscope wire rod is clamped by the working end, which extends into the circular arc-shaped notch and is matched with the inner wall of the upper seat body through pipe.

The circular arc notch extends to the lower end face of the upper seat body through pipe, so that a circular arc baffle plate protruding downwards is formed at the lower end part of the upper seat body through pipe, and the working end is matched with the circular arc baffle plate to clamp an endoscope wiring rod.

The working end is provided with a circular arc groove.

The upper seat body of the rod seat is provided with a yielding gap, and the actuating end is arranged in the yielding gap.

The upper seat body of the rod seat further comprises a reinforcing rib connected to the outer side of the through pipe of the upper seat body.

The reinforcing ribs are connected to the outer sides of the circular arc-shaped baffles.

A laparoscopic puncture device, comprising:

a puncture cannula arranged vertically is arranged,

A sealing component arranged at the top of the puncture cannula,

A puncture rod vertically inserted into the seal assembly and the puncture cannula, and

An air injection valve connected with the puncture cannula;

the puncture rod has the structure.

The application has the advantages that:

1. The puncture rod is characterized in that the rod seat is designed into an upper seat body and a lower seat body which are detachably connected, and the aperture of an endoscope insertion hole in the upper seat body is reduced to fix a very thin endoscope wiring rod, so that the aperture of inner holes of the rod head, the rod body and the lower seat body can be sequentially and gradually increased, the rod head, the lower seat body and the rod body can be connected together through one-time injection molding, and meanwhile, the rod head can be installed at the lower end of the rod body in an embedded mode. Therefore, the connecting strength of the rod head and the rod body is high, the joint is very smooth and seamless, and meanwhile, the connecting strength of the rod seat and the rod body is high, and the joint is very smooth and seamless. In addition, the club head and the club body can be perfectly butted, and the outer surfaces of the club head and the club body at the butted position can be completely flush, so that the insertion and extraction force of the puncture rod in the puncture sleeve is reduced, and meanwhile, the possibility that human tissues are accidentally injured by the puncture rod is greatly reduced.

2. The upper seat body of the rod seat is specially designed, so that the upper seat body can press and fix a very thin endoscope wire rod, the wire rod and the puncture rod are coaxial, the position stability of the endoscope in the puncture device in the puncture process is ensured, and the pressed bending probability of the endoscope wire rod can be greatly reduced.

3. The working end of the turning pressing tongue is provided with the arc-shaped groove, so that the extrusion contact area between the working end of the turning pressing tongue and the rod wall of the endoscope wire-walking rod can be increased, the pressure intensity between the working end of the turning pressing tongue and the rod wall of the endoscope wire-walking rod can be reduced, the static friction force between the working end of the turning pressing tongue and the rod wall of the endoscope wire-walking rod can be improved, and the hollow endoscope wire-walking rod can be prevented from collapsing and deforming due to extrusion of the small area of the turning pressing tongue.

Drawings

FIG. 1 is a schematic perspective view of a puncture outfit according to an embodiment of the present application;

FIG. 2 is a front view of the puncture outfit according to the embodiment of the present application;

FIG. 3 is a cross-sectional view of a puncture outfit according to an embodiment of the present application;

Fig. 4 is an enlarged view of the X portion of fig. 3:

FIG. 5 is an exploded view of the seal assembly with the seal housing removed in an embodiment of the application;

FIG. 6 is a schematic view of a flexible gasket according to an embodiment of the present application;

FIG. 7 is a schematic view of a structure of an upper seat body of a pole seat according to an embodiment of the present application;

FIG. 8 is an exploded view of a piercing post according to an embodiment of the present application;

FIG. 9 is an exploded view of the puncture cannula in the puncture device according to the embodiment of the present application;

FIG. 10 is a schematic view showing the internal structure of the puncture cannula according to the embodiment of the present application, wherein the upper half of the upper housing of the rod housing is removed;

FIG. 11 is a schematic view of the mating structure of the puncture cannula and the sealing assembly according to an embodiment of the present application;

FIG. 12 is a schematic view of a rotary ring according to an embodiment of the present application;

FIG. 13 is a schematic view of a structure of a seat body on a tube seat according to an embodiment of the present application;

FIG. 14 is a schematic view of the mating structure of the puncture cannula and the gas injection valve according to an embodiment of the present application;

FIG. 15 is a schematic structural view of a valve core of an air injection valve according to an embodiment of the present disclosure;

FIG. 16 is a schematic view of a valve seat of the gas injection valve according to the embodiment of the present application;

100-puncture sleeve, 200-sealing assembly, 300-puncture rod, 400-gas injection valve;

101-tube body, 102-tube seat, 103-rotating ring, 104-return spring and 105-one-way sealing ring;

1021-upper seat body of tube seat, 1022-lower seat body of tube seat;

1021 a-insertion hole, 1021 b-rotation stopping limiting block, 1021 c-spring abutting against the table;

1022 a-connecting tube 1022a-1 is an assembly slot;

1031-a clamping table, 1032-a spring groove, 1033-a spring positioning column and 1034-a rotary handle;

201-a seal housing, 202-an upper clasp, 203-a flexible gasket, 204-an anti-tipping protection sheet, 205-a lower clasp;

2011-upper housing, 2012-lower housing;

2011 a-upper compression ring and 2011 b-clamping groove;

2012 a-lower press ring, 2012 b-clamping tongue, 2012b-1 is clamping head;

2021-plug, 2022-positioning bump;

2031-a first through hole, 2032-a conical surface portion, 2033-a thickened annular ring, 2034-a horizontal annular rim, 2035-a vertical annular rim, 2036-a corrugated ring;

2031 a-an annular flange;

2033 a-first positioning holes, 2033 b-positioning bosses, 2033 c-positioning grooves and 2033 d-positioning grooves;

2041-second positioning holes, 2042-spherical parts, 2043-second through holes, 2044-positioning lugs and 2045-positioning notches;

301-rod body, 302-rod head and 303-rod seat;

3011-injection molding process holes;

3021-cutting edges;

3031-an upper seat body of the rod seat, 3032-a lower seat body of the rod seat, 3033-a turnover pressing tongue and 3034-an elastic clamping strip;

3031 a-upper seat body through pipe, 3031 b-abdication notch, 3031 c-reinforcing rib and 3031 d-pressing notch;

3032 a-lower housing tube;

3033 a-actuating end, 3033 b-working end, 3033b-1 being a circular arc-shaped groove;

3034 a-top arm, 3034 b-side arm, 3034b-1 being a bayonet;

401-valve seat, 402-valve core, 403-air inlet connecting pipe, 403-air outlet connecting pipe;

4021-a valve core rod, 4022-a rotating handle;

4021 a-vent holes, 4021 b-circular arc protrusions.

4011-Limit protrusions;

4041-glue groove, 4042-assembly boss.

Detailed Description

The application will be described in further detail below with reference to the drawings by means of specific embodiments. This application may be embodied in many different forms and is not limited to the implementations described in this example. The following detailed description is provided to facilitate a more thorough understanding of the present disclosure, in which words of upper, lower, left, right, etc., indicating orientations are used solely for the illustrated structure in the corresponding figures.

However, one skilled in the relevant art will recognize that the detailed description of one or more of the specific details may be omitted, or that other methods, components, or materials may be used. In some instances, some embodiments are not described or described in detail.

Furthermore, the features and aspects described herein may be combined in any suitable manner in one or more embodiments. It will be readily understood by those skilled in the art that the steps or order of operation of the methods associated with the embodiments provided herein may also be varied. Thus, any order in the figures and examples is for illustrative purposes only and does not imply that a certain order is required unless explicitly stated that a certain order is required.

The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated.

Fig. 1 to 16 show a preferred embodiment of a laparoscopic puncture outfit according to the present application, which is mainly composed of four parts of a puncture cannula 100, a sealing assembly 200, a puncture rod 300 and an insufflation valve 400. Wherein, the sealing assembly 200 is detachably connected to the top end of the puncture cannula 100, the gas injection valve 400 is installed at one side of the top of the puncture cannula 100, and the puncture rod 300 is movably inserted into the sealing assembly 200 and the puncture cannula 100. Specifically:

The puncture cannula 100 comprises a tube body 101 extending vertically from top to bottom and a tube seat 102 fixedly connected to the top end of the tube body. Wherein, the tube body 101 and the tube seat 102 are internally provided with a vertical channel for inserting the puncture rod 300, namely a puncture rod insertion channel. For convenient holding, a plurality of annular ribs surrounding the periphery of the tube body 101 are formed on the outer surface of the tube body, and the annular ribs are sequentially and uniformly distributed from top to bottom.

In this embodiment, the terms "up, down, vertical and vertical" refer to fig. 3 unless otherwise specified.

The seal assembly 200 is removably attached to the top of the header 102 by a snap-fit arrangement. When the penetration rod 300 is sequentially inserted into the sealing assembly 200 and the penetration cannula 100 from top to bottom so as to penetrate the skin of a patient to enter the abdominal cavity by using the penetration device, the sealing assembly 200 can seal the insertion channel of the penetration rod 300 to prevent foreign matters in the environment, particularly infection sources, from entering the patient from the penetration cannula 100. When surgical medical devices are sequentially inserted into the sealing unit 200 and the puncture cannula 100 after the completion of the puncture and the pneumoperitoneum is established, the sealing unit 200 also seals the insertion passage (the same as the insertion passage of the puncture rod) of the medical devices when the laparoscopic surgery is to be performed, thereby preventing foreign substances in the environment, particularly, infection sources, from entering the patient from the puncture cannula 100 during the preparation and the operation.

The puncture rod 300 comprises a hollow rod body 301, a rod head 302 fixed at the lower end of the rod body, and a rod seat 303 fixed at the upper end of the rod body and provided with a vertical jack. The rod 301, the rod head 302 and the rod seat 303 are provided with an endoscope channel for inserting an endoscope, wherein the endoscope channel comprises a hollow part of the rod 301, a vertical jack of the rod seat 303 and a slot on the rod head. The club head 302, also called a spike, is generally of a pointed cone-shaped configuration, and has a convex edge 3021 on its surface, and a socket for placing an endoscope lens therein, which is formed by recessing from the top of the spike. The rod seat 303 is provided with a holding handle for holding by medical staff, so that the insertion and extraction of the puncture rod are convenient, and the medical staff can puncture the abdominal skin of an operated person. In order to avoid the puncture rod 300 from being separated from the sealing assembly 200 and the puncture cannula 100 during the puncture process, and ensure that the puncture is performed smoothly, a connection mechanism for detachably and fixedly connecting the rod seat 303 and the sealing assembly 200 is further provided in this embodiment, and the specific structural form of the connection mechanism is described later.

An insufflation valve 400 is installed at the side of the stem 102 of the puncture cannula 100 for connecting to a CO2 gas supply device to inject CO2 gas into the abdominal cavity of the operated person to establish a pneumoperitoneum. The gas injection valve 400 has two working states of opening and closing, the gas injection valve 400 can be opened only when gas is injected, and under other conditions, the gas injection valve 400 is in a closed state so as to prevent foreign objects, particularly infection sources, from entering the puncture outfit and even the abdominal cavity from the gas injection valve, and simultaneously prevent gas in the abdominal cavity from overflowing.

In this embodiment, the seal assembly 200 includes a seal housing 201 having a substantially circular ring shape, and an upper retaining ring 202, an anti-overturning guard 204, a flexible gasket 203, and a lower retaining ring 205 are fixedly installed in the seal housing 201. Wherein the upper snap ring 202 and the lower snap ring 205 are detachably snapped up and down, and the flexible gasket 203 and the anti-rollover protection sheet 204 are sandwiched between the upper snap ring 202 and the lower snap ring 205. Specifically:

In order to facilitate the installation of the above-described anti-rollover protection sheet 204, the flexible gasket 203, and the lower grommet 205 in the seal housing 201, the seal housing 201 in this embodiment is composed of an upper case 2011 and a lower case 2012 that are fastened to each other and detachably and fixedly connected together. The upper housing 2011 and the lower housing 2012 are provided with vertically penetrating insertion holes, and the insertion holes are coaxially arranged with the first through holes of the upper retaining ring, the lower retaining ring, the flexible sealing gasket 203 and the second through holes of the anti-turning protection sheet 204, so as to be penetrated by a puncture rod or a medical instrument. A plurality of downward projecting posts 2021 are integrally provided on the upper buckle 202, and these posts 2021 are arranged at regular intervals along the circumferential direction. Correspondingly, the flexible sealing pad 203 is provided with a plurality of vertically penetrating first positioning holes 2033a, the anti-turning protection sheet 204 is provided with a plurality of vertically penetrating second positioning holes 2041, the top surface of the lower retaining ring 205 is provided with a plurality of downwardly recessed slots (not shown in the figure), and the first positioning holes 2033a, the second positioning holes 2041 and the slots are uniformly distributed at intervals along the circumferential direction. The plug 2021 on the upper snap ring 202 passes through the second positioning hole 2041 and the first positioning hole 2033a in order from top to bottom, and is then fixedly (by interference) inserted into the slot of the lower snap ring 205. The first positioning hole 2033a on the flexible gasket 203 cooperates with the plug 2021 for fixing the position of the flexible gasket 203, preventing the flexible gasket 203 from moving circumferentially or radially. The second positioning hole 2041 on the anti-rollover protection sheet 204 is matched with the plug 2021, and is used for fixing the position of the anti-rollover protection sheet 204 and preventing the anti-rollover protection sheet 204 from moving circumferentially or radially.

The flexible sealing pad 203 is of an integrated structure, is made of soft and deformable rubber, has a circular outer contour, is vertically penetrated by a smaller circular first through hole 2031 in the center part, has a diameter smaller than that of the rod body 302 of the puncture rod 300, and is smaller than that of a medical instrument which needs to be stretched into the abdominal cavity during operation. After the puncture rod 300 (or medical instrument) is inserted into the first through hole 2031 of the flexible seal 203, the first through hole 2031 is elastically deformed by expansion, and the hole wall of the first through hole 2031 is elastically pressed against the rod wall of the puncture rod body 301 to form a seal.

In order to guide the lower end portion of the puncture rod (i.e., the head 302) to move toward the first through hole 2031 on the flexible sealing pad 203 when the puncture rod 300 is inserted downward, so as to avoid puncturing the flexible sealing pad 203 by piercing the non-center portion (i.e., the non-first through hole portion) of the flexible sealing pad 203 when the puncture rod 300 is inserted downward, the flexible sealing pad 203 of this embodiment includes a conical surface portion 2032 (approximately funnel-shaped structure) in the middle portion thereof, with the tip of the conical surface portion 2032 facing downward, and the first through hole 2031 is disposed at the bottom tip position of the conical surface portion 2032. When the tip 302 of the lower end portion of the piercing member 300 first contacts the conical surface portion 2032 instead of the first through hole 2031 during the insertion movement, the inclined surface at the upper portion of the conical surface portion 2032 guides the tip 302 to move toward the central first through hole 2031 and finally to pass downward from the first through hole 2031.

In order to further improve the sealability of the flexible sealing pad 203 against the insertion passage of the puncture rod 300 (or medical instrument), the flexible sealing pad 203 of the present embodiment includes an annular flange 2031a integrally provided at the hole of the lower end of the aforementioned first through hole 2031 and protruding downward. The annular flange 2031a has a structure reinforcing effect, reduces the possibility of tearing of the first through hole 2031, and increases the axial dimension of the first through hole 2031, thereby increasing the extrusion contact area with the wall of the first through hole 2031 when the puncture rod 300 (or medical instrument) is inserted, and improving the sealing capability.

When the medical staff withdraws the puncture rod 300 upwards, the conical surface portion 2032 is easily turned upwards by the friction force between the wall of the puncture rod and the wall of the first through hole, and the tip and the central first through hole 2031 of the conical surface portion 2032 are located above the conical surface portion 2032 after the conical surface portion 2032 is turned upside down, in which case, if the puncture rod or the medical instrument is inserted downwards again, the conical surface portion 2032 cannot guide the lower end portion of the puncture rod or the medical instrument to move to the central first through hole 2031, but instead can reversely guide the lower end portion to the side portion of the conical surface portion 2032, so that the insertion of the puncture rod or the medical instrument is very difficult, and even the flexible sealing gasket 203 is punctured to lose the sealing performance. The anti-rollover protection sheet 204 disposed above the flexible gasket 203 just solves the problem:

The anti-turnover protective sheet 204 is made of hard plastic, a spherical surface portion 2042 protruding downwards is arranged in the middle of the anti-turnover protective sheet, a second through hole 2043 with a larger aperture than the first through hole 2031 is vertically arranged in a penetrating manner in the center of the spherical surface portion 2042, and the second through hole 2043 and the first through hole 2031 are coaxially arranged one above the other.

In practical use, when the medical staff withdraws the puncture rod 300 upwards, the conical surface portion 2032 of the flexible sealing pad 203 is blocked by the spherical surface portion 2041 on the anti-overturn protection piece 204 when being deformed upwards (upturning deformation), so that the conical surface portion 2032 cannot be overturned.

In order to facilitate the positioning of the anti-overturning protecting piece 204 and the flexible sealing pad 203, the anti-overturning protecting piece 204 and the flexible sealing pad 203 are sleeved on the plug 2021 of the upper retaining ring 202, and the following improvement is made in the structure of the anti-overturning protecting piece 204 and the flexible sealing pad 203 in this embodiment:

the flexible sealing pad 203 further comprises a ring of thickened circular ring 2033 with a larger thickness, which integrally surrounds the periphery of the conical surface portion 2032, and four positioning bosses 2033b protruding upwards are integrally formed at the top of the thickened circular ring 2033, and the four positioning bosses 2033b are uniformly distributed at intervals along the circumferential direction, so that one positioning groove 2033c is formed between any two adjacent positioning bosses 2033 b. Four positioning lugs 2044 extending outwards in the radial direction are integrally arranged at the outer edge of the anti-overturning protective piece 204, and the four positioning lugs 2044 are uniformly distributed at intervals along the circumferential direction, so that a positioning notch 2045 is formed between any two adjacent positioning lugs 2044.

During assembly, the positioning boss 2033b of the flexible sealing gasket 203 is embedded into the positioning notch 2045 of the anti-overturning protecting piece 204, and meanwhile, the positioning lug 2044 of the anti-overturning protecting piece 204 is just embedded into the positioning groove 2033c of the flexible sealing gasket 203, so that the assembly and the positioning of the flexible sealing gasket 203 and the anti-overturning protecting piece 204 are realized. At this time, each of the first through holes 2031 on the flexible gasket 203 is aligned with each of the second through holes 2041 on the anti-roll-over protection sheet 204, and the plug 2021 of the upper grommet 202 can be inserted into the aligned first through holes 2031 and second through holes 2041 very conveniently.

Each first through hole 2031 of the flexible gasket 203 is provided at its positioning groove 2033c, and each second through hole 2041 of the anti-roll-over protection sheet 204 is provided at its positioning tab 2044.

So, after the assembly of the upper snap ring 202, the anti-turning protection sheet 204, the flexible sealing gasket 203 and the lower snap ring 205 is completed, only the thickened circular ring 2033 part of the flexible sealing gasket 203 is vertically extruded, and the thickened circular ring 2033 has a larger thickness, so the flexible sealing gasket is not easy to damage after being pressed, and the service life is prolonged.

In this embodiment, the positioning bosses 2033b are further provided with positioning grooves 2033d recessed downward, and four positioning protrusions 2022 protruding downward are provided on the upper retaining ring 202, and the positioning protrusions 2022 are respectively embedded into the positioning grooves 2033d, so that the assembly of the upper retaining ring 202 and the flexible sealing gasket 203 can be positioned.

Also, in the vertical direction, the groove depth of the positioning groove 2033c on the flexible seal 203 is equal to the thickness of the positioning tab 2044 on the anti-rollover protection sheet 204. Thus, after the positioning tab 2044 is inserted into the positioning groove 2033c after the assembly is completed, the upper surface of the anti-rollover protection sheet 204 is flush with the upper surface of the positioning boss 2033b, and the upper snap ring 202 is in flat contact with the anti-rollover protection sheet 204 and the positioning boss 2033b, thereby preventing the positioning boss 2033b of the flexible gasket 203 from being excessively pressed by the upper snap ring 202, resulting in large-size downward concave deformation of the positioning boss 2033b and breakage.

It is seen from the above that when the upper retaining ring, the anti-turning protective sheet, the flexible sealing gasket and the lower retaining ring are assembled behind the sealing element shell, the flexible sealing gasket is tightly clamped between the anti-turning protective sheet and the upper retaining ring, and the pressing contact surface of the flexible sealing gasket and the anti-turning protective sheet and the pressing contact surface of the flexible sealing gasket and the upper retaining ring can be kept well sealed, so that air leakage can be avoided. However, if a good seal is not maintained between the peripheral edge of the flexible seal and the seal housing, gases that are introduced into the patient's abdominal cavity may escape therefrom.

In view of the above problems, the embodiment further improves the sealing assembly 200 as follows to ensure the tightness of the connection between the flexible sealing pad 203 and the seal housing 201, and prevent air leakage at the mating position of the flexible sealing pad 203 and the seal housing 201, specifically:

The present embodiment seals the outer edge of the flexible gasket 203 between the upper housing 2011 and the lower housing 2012. Further, the outer edge of the flexible sealing pad 203 includes a ring of horizontal annular edges 2033d extending horizontally and a ring of vertical annular edges 2035 integrally connected to the periphery of the horizontal annular edges 2034 and extending vertically downward. The upper housing 2011 includes a ring of upper compression ring 2011a extending vertically downward, the lower housing 2012 includes a ring of lower compression ring 2011a extending vertically upward, and the upper compression ring 2011a and the lower compression ring 2012a are both in a circular structure. After the assembly is completed, the vertical annular edge 2035 is elastically abutted (i.e., not only is the vertical annular edge 2035 abutted against each other, but also a certain elastic extrusion force exists, so that the tightness between the sealing ring and the lower pressure ring can be improved) and sleeved on the periphery of the lower pressure ring 2012a, and the horizontal annular edge 2033d is vertically clamped between the upper pressure ring 2011a and the lower pressure ring 2012 a. Obviously, this configuration greatly enhances the tightness of the flexible gasket 203 in cooperation with the seal housing 201.

To ensure that the vertical circular rim 2035 of the flexible seal 203 is able to resiliently abut the periphery of the lower pressure ring 2012a after assembly is completed, it is necessary that the inner diameter of the vertical circular rim 2035 in a natural state be smaller than the outer diameter of the lower pressure ring 2012 a. Obviously, this will increase the difficulty of mounting the flexible seal 203 on the lower compression ring 2012 a. In this regard, this embodiment provides a further optimized improvement in the structure of the flexible gasket 203:

The flexible gasket 203 further includes a plurality of ring-like crease rings 2036 disposed around the periphery of the aforementioned thickened ring 2033, and each ring of the crease rings 2036 is disposed sequentially around from inside to outside. The crimped ring 2036 greatly enhances the radial deformability of the flexible gasket 203 so that the vertical annular rim 2035 can be very conveniently sleeved around the lower pressure ring 2012 a.

During the lancing operation, in order to observe the lancing condition in real time, and to prevent the lancing lever, and in particular the tip 302 of the lancing lever, from scratching the tissue in the body, an endoscope extending into the lancing lever 300 needs to be deployed. An endoscope used in laparoscopic surgery mainly comprises a wire rod and a lens arranged at the front end of the wire rod. The wiring rod is of a hollow structure (tubular structure), a wire connected with the lens is arranged in the wiring rod, and the rear end of the wire is connected with a computer (or other image processors). The lens at the front end transmits the collected image to the computer at the rear end through the lead in the wiring rod, and the image information in the abdominal cavity of the patient is displayed on the computer in real time.

In practical application, the relative fixation of the endoscope, particularly the wire rod and the puncture rod of the endoscope, is required to be ensured, so that the endoscope is prevented from moving in the puncture process and the in-vivo image can not be accurately and clearly acquired. While the endoscope used in laparoscopic surgery is of standard size, the track bar is very thin. The diameter of the wiring rod is smaller than the diameter of the inner hole of the puncture rod body 301, the puncture rod head 302 for accommodating the front lens of the endoscope has smaller inner space (especially the bottom tip space). The endoscope routing bar is preferably arranged coaxially with the bore of the piercing bar body 301 because only so is the lower end lens guaranteed to be in the desired position within the bar head 302 while bending deformation due to the routing bar is prevented.

To meet the above requirements, it is conventional practice to: the bore diameter of the puncture rod seat 303 is made small-the bore diameter is slightly larger than (substantially equal to) the endoscope routing rod diameter, and the bore of the rod seat 303 is coaxial with the bore of the rod body 301. After the endoscope penetrates into the puncture rod, the wire rod is pressed against the inner hole wall of the rod seat by the overturning pressing tongue which is arranged on the rod seat 303 and is positioned at one radial side of the wire rod of the endoscope, so that the wire rod is radially clamped between the overturning pressing tongue and the inner hole wall of the rod seat of the puncture rod, and the fixation of the endoscope is completed.

In the conventional scheme, in the case where the shaft 301 and the shaft seat 303 of the penetration shaft 300 are constructed as described above, the head 302 is generally constructed to be covered at the lower end portion of the shaft 301 because:

1. If the upper end of the club head 302 is embedded in the lower end of the club body 301, the club body cannot be used as an injection molding insert (in this case, the club body needs to be made of metal) for injection molding the club head 302, because the step at the connection between the inner hole of the club seat 303 and the inner hole of the club body 301 can block the core pulling up of the molded core rod, i.e. the mold cannot complete the core pulling action.

2. If the rod body 302 is manufactured separately, and then the manufactured rod head 302 is fixedly inserted into the lower end portion of the rod body 301, the rod head 302 is deformed to affect the puncture performance of the rod head, a gap (the gap opening direction is horizontally outward) with a certain size is necessarily formed between the rod head 302 and the rod body 301 in a mechanical insertion connection mode, and in practical application, internal tissues of an operator may be blocked into the gap, and the internal tissues are pulled, so that the operator is greatly injured.

Therefore, in the conventional scheme, the club head 302 is sleeved and fixed on the lower end of the club body 301. This is because, although a gap exists between the club head 302, which is externally wrapped around the lower end of the club body 301, and the club body 301, the gap is upwardly opened, and the possibility that the vertical gap will catch the tissue in the human body during use is relatively small, which is the reason why this is the case. Some manufacturers can use an injection molding mode to cover the club head on the periphery of the club body, but the outer surface of the club head protrudes out of the outer surface of the club body, an annular step is formed between the club head and the club head, and the annular step is easy to damage tissues in a patient during puncture operation.

In addition, in the conventional scheme, no matter the club head 302 adopts the embedded type mounting structure or the external wrapping type mounting structure, there is a problem that the connection strength between the club head and the club body is not high. In use, there is a possibility that the head 302 may be detached from the shaft 301 in theory, and although this possibility is small, a serious medical accident may be caused once it occurs.

It is appreciated that the present embodiment solves the above-described problems very skillfully. In this embodiment, the shaft seat 303 is injection-molded with the shaft 301, the club head 302 is injection-molded with the shaft 301, and the club head 302 is embedded in the lower end of the shaft 301. Specifically:

The rod seat 303 is composed of a rod seat upper seat body 3031 and a rod seat lower seat body 3032 which are detachably connected, wherein the rod seat upper seat body 3031 and the rod seat lower seat body 3032 are plastic parts, and the two can be detachably connected by a screw or a clamping connection. When the puncture rod 300 is processed, the rod 301 made of metal is used as an insert to be placed in a die cavity of an injection die, meanwhile, a rod head 302 and a lower rod seat 3032 are obtained by injection molding at two ends of the rod 301, after injection molding is completed, the lower part of the lower rod seat 3032 is sleeved outside the upper end part of the rod 301, and the upper part of the rod head 302 is embedded inside the lower end part of the rod 301. Because the inner hole diameters of the club head 302, the club body 301 and the lower club seat 3032 are sequentially increased, after injection molding is completed, the core rod which is positioned in the mold cavity and is inserted into the lower club seat 3032, the club body 301 and the club head 302 can be smoothly pulled out (core pulling) upwards.

The club head 302 is injection-molded with the club body 301, and the joint strength of the club head and the club body is high and the joint is very smooth and seamless. The lower rod seat 3032 is also in injection-molded connection with the rod body 301, and the connection strength of the lower rod seat 3032 and the rod body is high and the connection part is very smooth and seamless. The above problems are well overcome.

During injection molding, only the mold structure and the process are controlled, so that the club head 302 and the lower end face of the inner hole of the club body 301 can be tightly attached, and the outer surface of the club head 302 and the outer surface (at the butt joint) of the club body 301 are completely flush.

An injection molding process hole 3011 is formed at the lower end of the rod 301, so that a part of the rod head 302 flows into the injection molding process hole 3011 during injection molding, a stopper embedded in the injection molding process hole 3011 is formed, and the bonding force between the rod head 302 and the rod 301 is further improved.

Similarly, an injection molding hole 3011 is also formed in the upper end of the rod 301, so that a part of the lower rod seat 3032 flows into the injection molding hole 3011 during injection molding, forming a stopper inserted into the injection molding hole 3011, and further improving the bonding force between the lower rod seat 3032 and the rod 301.

As can be seen from the above, the club head 302, the lower seat 3032 and the club body 301 can be integrally injection-molded together according to the present embodiment, and the main reason is that the bore diameters of the club head 302, the club body 301 and the lower seat 3032 are sequentially increased. Thus, how should an endoscope be used during a puncture be secured? The embodiment adopts the following structure very skillfully:

The upper rod seat body 3031 includes an upper seat body tube 3031a disposed in the middle portion and having a vertical through hole (corresponding to an upper hole section of a conventional rod seat inner hole), and the lower rod seat body 3032 includes a lower seat body tube 3032a disposed in the middle portion and having a vertical through hole (corresponding to a lower hole section of a conventional rod seat inner hole), and after the upper seat body and the lower seat body are assembled together to form the rod seat 303, the upper seat body tube 3031a and the lower seat body tube 3032a are vertically communicated and coaxially arranged to provide an insertion channel for an endoscope. And the aperture of the vertical through hole in the upper housing tube 3031a is slightly larger than (substantially equal to) the rod diameter of the endoscope routing rod, it is obvious that the aperture of the vertical through hole in the upper housing tube 3031a is smaller than the aperture of the vertical through hole in the lower housing tube 3032 a. The pipe wall at the lower end of the upper housing tube 3031a is provided with a circular arc-shaped slit in the circumferential direction, and the circular arc-shaped slit extends to the lower end surface of the upper housing tube 3031a, thereby forming a circular arc-shaped baffle 3031a-1 facing the circular arc-shaped slit. The circular baffle is actually a part of the pipe wall of the upper seat body through pipe 3031a, and the circular baffle and another part of the circular pipe wall which are not cut form a lower pipe section of the upper seat body through pipe 3031a when the circular arc-shaped notch is not cut. The lower body 3032 of the holder is hinged with a manually reversible push tongue 3033, the push tongue 3033 having an actuating end 3033a exposed to the outer surface of the holder 301 and a working end 3033b extending into the circular arc cutout. In practical application, a user presses the actuating end 3033a of the turning tongue 3033 to turn the turning tongue 3033, the working end 3033b of the turning tongue 3033 moves towards the endoscope routing rod of the upper seat tube 3031a while turning, and the endoscope routing rod is pressed towards the inner wall of the upper seat tube 3031a, so that the endoscope routing rod is radially pressed and fixed between the turning tongue working end 3033b and the inner wall of the upper seat tube 3031 a. The working end 3033b of the roll-over tongue cooperates with the circular arc shaped shield 3031a-1 to clamp the track bar of the endoscope.

It should be noted that, the circular arc-shaped notch may not extend to the lower end surface of the upper seat body through pipe 3031a, and is a circular arc-shaped long hole formed on the pipe wall of the upper seat body through pipe 3031a in structure, and the working end 3033b of the turning pressing tongue 3033 may also extend into the circular arc-shaped long hole to cooperate with the pipe inner wall of the upper seat body through pipe to clamp the wire rod of the endoscope.

In order to increase the extrusion contact area between the working end 3033b of the turning pressing tongue and the rod wall of the endoscope routing rod, thereby reducing the pressure intensity between the working end 3033b of the turning pressing tongue and the rod wall of the endoscope routing rod, improving the static friction force between the working end 3033b of the turning pressing tongue and the rod wall of the endoscope routing rod, and preventing the hollow endoscope routing rod from collapsing and deforming inwards in the radial direction due to extrusion of the turning pressing tongue, the working end 3033b of the turning pressing tongue is provided with a circular arc-shaped groove 3033b-1.

In order to facilitate the user's action on the roll-over tongue actuation end 3033a, the present embodiment provides a protective ridge on the surface of the roll-over tongue actuation end 3033a to prevent slippage.

And, the upper seat body 3031 of the lever seat is provided with a yielding gap 3031b, and the turning tongue-pressing actuating end 3033a is arranged in the yielding gap 3031b so as to be convenient for the user to contact and actuate.

Because the wall of the upper housing tube 3031a can bear the radial extrusion force of the endoscope routing rod for a long time at high frequency during practical application, in order to avoid the deformation of the upper housing tube 3031a under long-term high-frequency compression, the wall of the upper housing tube 3031a is made to be very thick, i.e. thicker than the wall of the lower housing tube 3032a, and two reinforcing ribs 3031c connected to the outer side of the upper housing tube 3031a are integrally arranged on the upper housing tube 3031 of the rod housing. Because the circular arc-shaped baffle 3031a-1 is a main bearing portion, the two reinforcing ribs 3031c are specifically connected to the outer side of the circular arc-shaped baffle 3031 a-1.

In order to avoid the puncture rod 300 from being separated from the sealing assembly 200 and the puncture cannula 100 during the puncture process, the present embodiment provides a connection mechanism for detachably and fixedly connecting the puncture rod holder 303 with the sealing assembly 200, and the following details of the structure of the connection mechanism are described below:

The top of the seal member housing 201 (specifically, the upper housing 2011) is provided with a left concave clamping groove 2011b and a right concave clamping groove, an elastic clamping strip 3034 made of plastic is fixedly installed in a rod seat upper seat 3031 of the puncture rod seat 303, the outer contour of the elastic clamping strip 3034 is approximately in an inverted U shape, the elastic clamping strip comprises a top arm 3034a and two side arms 3034b integrally and downwardly extending from the left end part and the right end part of the top arm respectively, the top arm 3034a is approximately in a ring structure, the lower end of each side arm 3034b is provided with a clamping rib 3034b-1 which extends outwards along the radial direction of the lower seat through pipe 2a (namely, the radial direction of the puncture sleeve), and the top arm 3034a is fixedly connected with the rod seat upper seat 3031 of the puncture rod seat 303. In practical application, a user can press the two side arms 3034b of the elastic clamping strip 3034 inwardly with fingers to make the two side arms 3034b approach each other for a certain distance, then insert the side arms 3034b into the clamping grooves 2011b of the seal member housing 201, release the fingers, release the pressing force applied to the elastic clamping strip 3034 in the left-right direction, and the two side walls 3034b are far away outwardly, and the clamping edges 3034b-1 at the end portions of the two side walls are clamped in the clamping grooves 2011b, so that the elastic clamping strip 3034 is fixedly connected with the upper housing 2011 of the seal member housing, that is, the puncture rod 300 is fixedly connected with the seal member 200. When the puncture rod 300 is to be pulled out, the two side arms 3034b of the elastic locking bar 3034 are pressed inward again, the locking between the locking rib 3034b-1 and the locking groove 2011b is released, and then the puncture rod 300 is pulled out upward.

This is inconvenient if the resilient catch 3034 is to be pressed each time the lancing lever 300 is inserted into the sealing assembly 200 and the lancing cannula 100. In this regard, in the present embodiment, a guiding slope (not shown) is provided at the bottom of the blocking rib 3034 b-1. In this way, when the puncture rod 300 is mounted, only the two side arms 3034b need to be pushed downward in alignment with the two locking grooves 2011b, and the lower end portions of the two side arms 3034b are inserted downward into the locking grooves 2011b while approaching each other under the guiding of the guide inclined surfaces and the pushing force.

In order to facilitate the user to press and unlock the two side arms 3034b of the elastic clamping strip 3034, in this embodiment, two pressing slits 3031d are formed on the upper seat body 3031 of the lever seat, and the two side arms 3034b are respectively disposed in the two pressing slits 3031d, so as to facilitate the user to touch and actuate. And a protective rib is provided on the surface of the side arm 3034 b.

In addition, the lower body 3032 of the stick base is formed with two spaced side arm through holes 3032b, and the side arm 3034b is inserted into the side arm through holes 3032b, so that the side arm 3034b is limited by the side arm through holes 3032b to prevent the two side arms 3034b from being deformed toward each other or from being deformed away from each other without limitation after the puncture stick 300 is withdrawn.

In addition, when a physician needs to remove foreign matter from the patient, a secondary separation of the penetrator is required, i.e., removal of the seal assembly 200 from the penetration cannula 100. In this regard, the puncture outfit of the present embodiment is also designed as follows:

A rotary latch with a return spring is installed in the tube seat 102 of the puncture cannula 100, and two insertion holes 1021a extending downward into the installation space of the rotary latch are opened at the top of the tube seat 102. The bottom of the lower housing 2012 of the seal housing 201 is integrally provided with two downwardly projecting tabs 2012b which mate with the aforementioned rotary catches, the bottom of the tabs 2012b having clips 2012b-1 projecting outwardly in the radial direction of the rotary ring. In general, the latch 2012b is inserted into the jack 1021a and locked with the rotary lock catch, so as to fix the sealing assembly 200 and the puncture cannula 100; when the doctor needs to take out the foreign matter, the rotary lock catch is unlocked, the sealing assembly 200 is pulled upwards, the clamping tongue 2012b is pulled upwards from the inserting hole 1021a, and the sealing assembly 200 is removed.

In this embodiment, the specific structure of the rotary lock catch is as follows:

The holder 102 of the puncture cannula 100 is composed of a holder upper holder 1021 and a holder lower holder 1022 which are detachably and fixedly connected, and the insertion hole 1021a is provided in the holder upper holder 1021. The top of the lower seat body 1022 of the tube seat is provided with a downward concave inserting groove, the bottom of the upper seat body 1021 of the tube seat is integrally provided with a downward extending inserting column, and the inserting column is inserted into the inserting groove in an interference manner, so that the detachable fixed connection between the upper seat body 1021 of the tube seat and the lower seat body 1022 of the tube seat is realized. The upper body 1021 and the lower body 1022 form a circular cavity therebetween after assembly. A rotating ring 103 is movably arranged in the circular inner cavity, two clamping tables 1031 extending radially inwards are integrally arranged on the inner peripheral wall of the rotating ring 103, a circular arc-shaped spring groove 1032 is integrally formed on the inner peripheral wall of the rotating ring 103, one end of the circular arc-shaped spring groove 1032 in the length direction is closed, the other end of the circular arc-shaped spring groove 1032 is open, a spring positioning column 1033 extending into the spring groove 1032 is fixedly arranged at the closed end, a return spring 104 is arranged in the spring groove 1032, and one end of the return spring 104 is sleeved on the spring positioning column 1033. A spring abutment table 1021c and a rotation stopping limiting block 1021b positioned in the circular inner cavity are fixedly arranged on the upper seat body 1021 of the tube seat, the other end of the return spring 104 abuts against the spring abutment table 1021c, and the closed end of the spring groove 1032 abuts against the rotation stopping limiting block 1021 b.

In a natural state, the locking piece 1031 on the rotary ring 103 is abutted against the rotation stop block 1021b by the elastic force of the return spring 104, and the locking piece 1031 applies a clockwise abutment force in the plane view direction of the drawing XX to the rotation stop block 1021b, so that the circumferential angle of the rotary ring 103 in the natural state is positioned. The clamping head 2012b-1 at the bottom end of the clamping tongue 2012b abuts against the bottom of the clamping table 1031, and the clamping head 2012b and the clamping head are mutually clamped and fixed in the vertical direction, so that the clamping tongue 2012b cannot be pulled out upwards. When the seal assembly 200 needs to be removed, the rotating ring 103 is rotated counterclockwise in the top view direction of fig. 11, so that the clamping table 1031 on the rotating ring 103 moves counterclockwise for a certain stroke (at this time, the return spring 104 is compressed and shortened), and further, the clamping table 1031 and the clamping head 2012b-1 at the bottom end of the clamping tongue 2012b are staggered, at this time, the clamping table 1031 does not vertically limit the clamping head 2012b-1 at the bottom end of the clamping tongue 2012b any more, and the seal assembly 200 can be removed easily upwards. The rotary ring 103 is released, and the rotary ring 103 is restored under the elastic force of the return spring 104.

It will be appreciated that the circular arc spring slot 1032 and spring locating post 1033 at the end of the slot greatly facilitate the locating installation of the return spring 104, improving the assembly efficiency of the puncture outfit.

In this embodiment, the outer peripheral wall of the rotating ring 103 is disposed in abutment with the cavity wall of the circular inner cavity, so that the rotating ring 103 is limited, and only the rotating ring 103 is allowed to rotate, but the rotating ring 103 is not allowed to radially move.

To facilitate assembly of seal assembly 200 with lancing cannula 100, a guide ramp is also provided at the bottom of cartridge 2012 b-1. When the user reinstalls the removed sealing assembly 200, only the latch 2012b at the bottom of the sealing assembly 200 is required to be inserted downward in alignment with the insertion hole 1021a, and the bottom end of the latch 2012b is deformed (plastically deformed) radially inward under the guidance of the guide slope, so that the chuck 2012b-1 climbs over the latch 2012b to reach the bottom of the latch.

Further, the clamping table 1031 of the present embodiment is further provided with a guiding inclined plane 1031a extending from the top of the clamping table to the side of the clamping table, if the lower chuck 2012b-1 is clamped on the top of the clamping table 1031 during the inserting process of the clamping tongue 2012b and cannot complete the above-mentioned "climbing-over" action, the chuck 2012b-1 contacts with the guiding inclined plane 1031a, and when the chuck 2012b-1 moves down, a counterclockwise pushing force is applied to the guiding inclined plane 1031a in the top view direction of fig. 11, so that the rotating ring 103 rotates by a certain angle. And in the process of rotating the rotary ring 103, the bottom of the clamping head 2012b-1 is always in contact with the guiding inclined plane 1031a, while the clamping table 1031 moves along with the rotary ring, the clamping head 2012b-1 moves downwards, when the clamping head 2012b-1 moves downwards to the bottom of the clamping table 1031, the clamping head 2012b-1 does not apply anticlockwise thrust to the clamping table 1031 in the top view direction of fig. 11, under the action of the elastic force of the return spring 104, the rotary ring and the clamping table thereon return clockwise, and the clamping head 2012b-1 abuts against the bottom of the clamping table 1031.

In order to facilitate the rotation of the rotary ring 103 by the user, the present embodiment integrally provides a rotary knob 1034 extending radially outward on the outer peripheral wall of the rotary ring 103. Correspondingly, a notch 1021d for extending the rotary handle 1034 is formed on the upper base 1021 of the tube base, so as to facilitate the contact and actuation of the rotary handle 1034 by a user.

After the lancing lever 300 is withdrawn upward from the lancing sleeve 100 and the sealing assembly 200, the patient's abdominal cavity should remain isolated from the atmosphere to prevent the gases that are fed into the abdominal cavity from being vented outward. However, as can be seen from the specific construction of the seal assembly 200, the seal of the penetration channel of the penetration rod (or medical device) cannot be achieved by the seal assembly 200 alone after the penetration rod 300 is withdrawn. In this regard, in this embodiment, a unidirectional sealing ring 105 is further installed in the tube seat of the puncture cannula, and the unidirectional sealing ring 105 adopts a conventional structure, which can be penetrated by the puncture rod 300 and can seal and close the puncture cannula after the puncture rod 300 is pulled out.

The one-way seal 105 is fixedly installed between the upper seat 1021 and the lower seat 1022, and the one-way seal 105 can be easily taken out after the upper seat 1021 is detached from the lower seat 1022.

The gas injection valve 400 mainly includes a valve seat 401, a valve element 402, a gas inlet connection pipe 403, and a gas outlet connection pipe 404. Wherein:

A circular vertical through hole, which may be also referred to as a valve seat hole, is arranged in the valve seat 401 in a penetrating manner, a (part of a) valve core 402 is rotatably inserted in the vertical through hole, an air inlet connecting pipe 403 and an air outlet connecting pipe 404 are fixedly connected with the valve seat 401, the air inlet connecting pipe 403 and the air outlet connecting pipe 404 are respectively arranged on two radial sides of the vertical through hole, and meanwhile, the air inlet connecting pipe 403 and the air outlet connecting pipe 404 are directly communicated with the vertical through hole. The air outlet connection pipe 404 is fixedly connected with the puncture cannula 200 and is communicated with the puncture cannula 200. The valve core 402 includes a valve core rod 4021 rotatably inserted in the vertical through hole, and a rotating handle 4022 fixedly connected to the upper end of the valve core rod and located outside the vertical through hole, and a vent hole 4021a radially penetrating the valve core rod 4021 is formed in the valve core rod.

In practice, the intake manifold 403 is connected to the upstream air supply. If the user holds the rotation handle 4022 and rotates the valve core 402 so that the air vent 4021a on the valve core rod 4021 is just aligned with the air inlet connection pipe 403 and the air outlet connection pipe 404 on two sides, the air vent 4021a communicates the air inlet connection pipe 403 and the air outlet connection pipe 404 with each other, and the gas (CO 2) introduced from the air inlet connection pipe 403 sequentially enters the abdominal cavity of the patient through the valve core air vent 4021a, the air outlet connection pipe 404 and the puncture cannula 100, so that pneumoperitoneum is established. If the user rotates the valve core 402 reversely to make the vent hole 4021a on the valve core rod 4021 staggered with the air inlet connection pipe 403 and the air outlet connection pipe 404 on the two sides, the solid part of the valve core rod 4021 seals the left end pipe orifice of the air inlet connection pipe 403 in fig. 10, so that the air supplied from the air supply device cannot enter the air outlet connection pipe 404, and thus the air inflation to the abdominal cavity is stopped.

Whether the rotation angle of the spool 402 is required or not is determined by experience of the user alone, and is obviously unreliable or not preferable. In this regard, the present embodiment provides a structure for limiting the rotation angle of the valve element between the valve element and the valve seat, specifically: two limit protrusions 4011 are integrally arranged on the wall of the vertical through hole of the valve seat 401 at intervals along the circumferential direction, an arc protrusion 4021b extending in an arc shape is integrally arranged on the rod wall of the valve rod 4021, and the arc protrusion 4021b is arranged between the two limit protrusions 4011. In the process of rotating the valve core 402, when the circular arc protrusion 4021b is abutted against one of the limit protrusions 4011, the air vent 4021a on the valve core 402 is just aligned with the air inlet connection pipe 403 and the air outlet connection pipe 404, so that the air inlet connection pipe 403 and the air outlet connection pipe 404 are mutually communicated, and at the moment, the valve core 402 cannot continue to rotate along the initial direction due to the abutting and limiting of the circular arc protrusion 4021b and the limit protrusion 4011. That is, only the spool 402 can be rotated in the reverse direction at this time, and the spool cannot be rotated further in the initial direction. When the valve core 402 is reversely rotated and the arc protrusion 4021b is abutted against and contacted with the other limit protrusion 4011, the vent holes 4021a on the valve core 402 are just staggered with the air inlet connecting pipe 403 and the air outlet connecting pipe 404 on two sides, the pipe orifice of the air inlet connecting pipe 403 is blocked by the solid part of the valve core rod 4021, and the air supplied from the air supply equipment cannot enter the air outlet connecting pipe 404.

In addition, the gas injection valve 400 is assembled with the puncture cannula 100 for convenience. In this embodiment, a connecting pipe 1022a extending horizontally is integrally disposed on the lower seat 1022 of the tube seat, and the outer wall surface of the air outlet connecting pipe 404 is coated with glue and then inserted into the connecting pipe 1022a, so as to fix the air outlet connecting pipe 404 and the connecting pipe 1022a, thereby fixing the air injection valve 400 and the puncture cannula 100.

In order to make the above glue adhere between the outlet connection tube 404 and the connection tube 1022a more firmly, the present embodiment forms a ring of glue groove 4041 around the outlet connection tube 404 on the outer wall surface.

In addition, in order to ensure that the injection valve 400 has a precise installation angle on the puncture cannula 100, in this embodiment, an assembly groove 1022a-1 is formed on the wall of the pipe orifice of the connecting pipe 1022a, and an assembly boss 4042 is fixedly provided on the outer wall surface of the air outlet connecting pipe 404. During installation, the assembling boss 4042 is aligned with the assembling groove 1022a-1, so that the air outlet connection pipe 404 is inserted into the connection pipe 1022a according to a fixed angle, and the assembling boss 4042 is just embedded into the assembling groove 1022a-1 after the installation is completed.

The foregoing is a further detailed description of the application in connection with specific embodiments, and it is not intended that the application be limited to such description. It will be apparent to those skilled in the art that several simple deductions or substitutions can be made without departing from the spirit of the application.

Claims

1. A penetration rod of a laparoscopic penetration device, comprising:

a vertically arranged rod body (301),

A club head (302) with a cutting edge (3021) arranged at the lower end of the club body, and

A rod seat (303) arranged at the upper end of the rod body;

An endoscope channel is arranged in each of the rod seat (303), the rod body (301) and the rod head (302);

The novel rod is characterized in that the rod body (301) is a metal rod, the rod seat (303) is composed of a rod seat upper seat body (3031) and a rod seat lower seat body (3032) which are detachably connected, the rod seat upper seat body (3031) is in injection molding connection with the rod body (301), the rod head (302) is in injection molding connection with the rod body (301), the lower part of the rod seat lower seat body (3032) is sleeved outside the rod body (301), the upper part of the rod head (302) is embedded into the rod body (301), and the outer surface of the rod head (302) is arranged in parallel and level with the outer surface of the rod body (301);

an upper injection molding process hole and a lower injection molding process hole are respectively formed at the upper end and the lower end of the rod body (301), a stopper embedded in the upper injection molding process hole is formed on the rod head (302), and a stopper embedded in the lower injection molding process hole is formed on the lower seat body (3032) of the rod seat;

The upper seat body (3031) of the rod seat comprises an upper seat body through pipe (3031 a) with a vertical through hole, the lower seat body (3032) of the rod seat comprises a lower seat body through pipe (3032 a) with a vertical through hole, the upper seat body through pipe (3031 a) and the lower seat body through pipe (3032 a) are coaxially arranged and are communicated up and down, and the aperture of the vertical through hole in the upper seat body through pipe (3031 a) is smaller than the aperture of the vertical through hole in the lower seat body through pipe (3032 a).

2. The puncture rod of a laparoscopic puncture outfit according to claim 1, wherein a circular arc incision is formed on the pipe wall of the lower end part of the upper seat body through pipe (3031 a) along the circumferential direction, a turnover pressing tongue (3033) is hinged on the lower seat body (3032) of the rod seat, and the turnover pressing tongue (3033) comprises:

An actuating end (3033 a) exposing an outer surface of the lever seat (303), and

And the working end (3033 b) extends into the circular arc-shaped notch and is matched with the inner wall of the upper seat body through pipe (3031 a) to clamp the endoscope wiring rod.

3. The puncture rod of a laparoscopic puncture device according to claim 2, characterized in that the circular arc incision extends to the lower end surface of the upper housing tube (3031 a) so as to form a circular arc baffle (3031 a-1) protruding downwards at the lower end part of the upper housing tube (3031 a), and the working end (3033 b) cooperates with the circular arc baffle (3031 a-1) to clamp an endoscope wiring rod.

4. The puncture rod of a laparoscopic puncture device according to claim 2, characterized in that the working end (3033 b) is provided with a circular arc-shaped groove (3033 b-1).

5. The lancing lever of a laparoscopic lancet according to claim 2, wherein a relief notch (3031 b) is formed in the upper body (3031) of the lever seat, and the actuation end (3033 a) is disposed in the relief notch (3031 b).

6. A lancing lever for a laparoscopic lancet according to claim 3, wherein said lever housing upper housing (3031) further comprises a stiffener (3031 c) attached to the outside of said upper housing tube (3031 a).

7. The lancing lever of a laparoscopic lancet according to claim 6, wherein said stiffener (3031 c) is attached to the outside of said circular arc shaped shield (3031 a-1).

8. A laparoscopic puncture device, comprising:

a vertically arranged puncture cannula (100),

A sealing component (200) arranged at the top of the puncture cannula,

A penetration rod (300) vertically inserted into the seal assembly and the penetration sleeve, and

An air injection valve (400) connected to the puncture cannula;

characterized in that the piercing rod (300) is a piercing rod according to any one of claims 1 to 7.