CN107115137B

CN107115137B - Sealing assembly for abdominal cavity puncture outfit

Info

Publication number: CN107115137B
Application number: CN201710438838.2A
Authority: CN
Inventors: 郑红连; 仝小冬
Original assignee: Changzhou Arone Precision Machinery Co ltd
Current assignee: Changzhou Arone Precision Machinery Co ltd
Priority date: 2017-06-12
Filing date: 2017-06-12
Publication date: 2020-05-22
Anticipated expiration: 2037-06-12
Also published as: CN107115137A

Abstract

The invention discloses a sealing assembly for an abdominal cavity puncture outfit, and belongs to the field of medical puncture instruments. The invention discloses a sealing assembly for an abdominal cavity puncture outfit, which comprises an upper cover, a lower cover and a choke valve, wherein the choke valve comprises a valve wall and a wavy elastic skirt edge arranged on the periphery of the valve wall, an opening is formed in the center of the valve wall, the choke valve is clamped between the upper cover and the lower cover through the periphery of the elastic skirt edge, the valve wall is in an integral trumpet-shaped structure, and the gradient of the trumpet-shaped valve wall is gradually reduced from the opening in the center of the valve wall to the periphery of the valve wall. According to the invention, the choke valve in the sealing assembly is improved, so that the sealing performance of the sealing assembly is better, the deformation capability of the choke valve in the direction of resisting the center normal is obviously improved, the choke valve is not easy to turn up, and the air leakage risk of the choke valve is greatly reduced; meanwhile, the sealing assembly is simple and compact in structure, small in resistance to instruments and more flexible and convenient in instrument operation.

Description

Sealing assembly for abdominal cavity puncture outfit

Technical Field

The present invention relates to a laparoscopic surgical puncture instrument, and more particularly, to a seal assembly for a laparoscopic surgical puncture instrument.

Background

The abdominal cavity puncture outfit is a surgical instrument commonly used in abdominal cavity puncture operations, and is mainly used for establishing artificial pneumoperitoneum and an instrument channel in laparoscopic operations. In laparoscopic surgery, artificial pneumoperitoneum is the key to successful surgery, and the artificial pneumoperitoneum needs to be established before surgery so as to separate the peritoneal wall from the viscera, thereby facilitating the surgical operation. The existing abdominal cavity puncture outfit mainly comprises a puncture needle, a sealing valve and a puncture sheath tube, when in use, the puncture needle, the sealing valve and the puncture sheath tube are combined together firstly, the puncture sheath tube is punctured into an abdominal cavity from human skin by the puncture needle, and an artificial pneumoperitoneum is established by a gas injection valve on the puncture sheath tube; after the puncture needle is taken out, the sealing valve and the puncture sheath tube form an operation channel, and the surgical instrument is inserted into the abdominal cavity through the sealing valve and the puncture sheath tube to carry out laparoscopic operation. In the operation process, the surgical instruments are in sealing fit with the sealing valve, so that the pneumoperitoneum cannot leak air to influence the operation, when focal tissues need to be taken out, the sealing valve is detached from the puncture sheath, the sealing is realized by the fetching valve on the puncture sheath, and the focal tissues are taken out by instruments such as biopsy forceps and the like penetrating the fetching valve.

The design of the sealing valve of the abdominal cavity puncture outfit has great practical significance for laparoscopic surgery, and the sealing valve and surgical instruments are required to realize good sealing performance, and the sealing valve is also required to be convenient for the flexible operation of the surgical instruments. In Chinese patent number ZL200510062967.3, the date of the granted announcement is 6 months and 17 days in 2009, and the name of the invention creation is as follows: in the improved trocar seal application, a sealing valve arrangement for a laparoscopic puncture instrument is described, the seal assembly comprising a first substantially rigid ring, a second substantially rigid ring, and a plurality of layers of elastomeric members compressed between the two rings, the plurality of layers of elastomeric members being interlaced to form a conical seal, the plurality of layers of elastomeric members preferably having a semi-circular profile and preferably having a circumference of about 180 to 270 degrees; in addition, a protection component with a similar structure is arranged on the upper part of the conical sealing element. The abdominal cavity puncture outfit adopting the conical sealing piece with the structure is very common in the market, and achieves better use effect: for example, the seal eliminates the "hoop stress" problem with lip seals, greatly reduces strain in the system during instrument insertion by breaking the seal into multiple sections, effectively reduces the resistance to instrument insertion and withdrawal, and facilitates penetration of the instrument through the seal. However, the sealing member of the above structure has the following disadvantages:

1) the sealing element is formed by a multi-section structure, so that the processing and the assembly of the sealing element are difficult, and the manufacturing cost of the sealing element is increased;

2) because the sealing element adopts a multi-section structure, complete sealing is difficult to realize when the sealing element is matched with the side wall of the instrument, and the sealing performance of the sealing element is reduced to some extent.

In addition, for the lip-shaped sealing element, there are also related improved technical disclosures, such as chinese patent number ZL201320161408.8, the publication date of the authorization is 12 months and 25 days in 2013, and the name of the invention creation is: a multi-stage sealed medical puncture outfit is disclosed in the application, a non-resistance sealing ring is introduced, the center of the non-resistance sealing ring is a through hole, the non-resistance sealing ring comprises an umbrella-shaped core disc, the whole non-resistance sealing ring is of an integral structure formed in one step, the umbrella-shaped core disc is positioned in the middle of the non-resistance sealing ring, the umbrella-shaped core disc is of a protruding structure, and the umbrella-shaped core disc consists of a plurality of core disc elastic membranes which are uniformly distributed into an umbrella shape. The application adopts the non-resistance sealing ring with special structure and shape, ensures the instrument to move left and right without resistance in the puncture process by utilizing the film on the periphery of the non-resistance sealing ring, and ensures the instrument to be airtight when moving back and forth in the puncture process by utilizing the elastic film of the core disc. However, the above non-resistance sealing ring still has major defects: the non-resistance sealing ring is a lip-shaped sealing element, a central through hole of the non-resistance sealing ring has larger resistance to the insertion and extraction of an instrument while ensuring the sealing performance, when the instrument is extracted, an umbrella-shaped core disc of the non-resistance sealing ring is easy to turn outwards along with the extraction of the instrument, so that the re-insertion of the instrument is influenced, and after the sealing ring is turned upwards, the original deformation capacity of the sealing ring is reduced, the central hole is small, and the sealing ring is easy to be hooked by edges and corners of instruments such as suturing nails, hemostatic forceps and the like, so that the normal operation; moreover, the non-resistance sealing ring is frequently upturned along with the extraction of an instrument, so that the sealing ring is easy to crack and damage, and the risk of air leakage of the air blocking valve is increased.

In view of the above problems of the sealing member of the puncture outfit, there is a need for a new sealing assembly for a peritoneal puncture outfit.

Disclosure of Invention

1. Technical problem to be solved by the invention

The invention aims to overcome the defects of poor sealing property, easy eversion of the air-lock valve, strong blocking feeling of instrument operation and the like of the sealing component of the conventional abdominal cavity puncture outfit, and provides the sealing component for the abdominal cavity puncture outfit; meanwhile, the sealing assembly is simple and compact in structure, small in resistance to instruments and more flexible and convenient in instrument operation.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the invention discloses a sealing assembly for an abdominal cavity puncture outfit, which comprises an upper cover, a lower cover and an air-blocking valve, wherein the air-blocking valve comprises a valve wall and a wavy elastic skirt edge arranged on the periphery of the valve wall, an opening is arranged in the center of the valve wall, the air-blocking valve is clamped between the upper cover and the lower cover through the periphery of the elastic skirt edge, the valve wall is in an integral trumpet-shaped structure, and the gradient of the trumpet-shaped valve wall is gradually reduced from the central opening of the valve wall to the periphery of the valve wall.

Furthermore, a plurality of creases extending from the center of the valve wall to the periphery are uniformly distributed on the valve wall, and each crease is composed of a convex rib arranged on the inner side of the valve wall and a groove arranged on the outer side of the valve wall and corresponding to the convex rib in position and shape.

Furthermore, the folds are bent on the valve wall in the same direction around the central axis of the valve wall, the line type of the folds is a three-dimensional reducing spiral line, and the radius of the three-dimensional reducing spiral line is gradually increased from the outer periphery of the valve wall to the central direction.

Furthermore, the sealing lip at the central opening of the valve wall is provided with a trumpet-shaped outward turning structure, and a plurality of small convex ribs extending along the central axis of the sealing lip are uniformly distributed on the trumpet-shaped outward turning structure of the sealing lip.

Furthermore, the height of said small rib with respect to the flared surface of the sealing lip decreases with decreasing radial dimension of the sealing lip until the height with respect to the flared surface of the sealing lip is zero.

Furthermore, the inner side of the choke valve is also provided with a conical protection device which is formed by interweaving a plurality of protection blades and covers the inner side of the valve wall, the periphery of the protection device is clamped by the valve ring A and the valve ring B and is arranged in a containing cavity which is surrounded by the upper part of the valve wall and the elastic skirt edge.

Furthermore, the valve wall and the elastic skirt are of an integrally formed structure.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:

(1) the invention discloses a sealing assembly for an abdominal cavity puncture outfit, which comprises an upper cover, a lower cover and a choke valve, wherein the choke valve comprises a valve wall and a wavy elastic skirt edge arranged on the periphery of the valve wall; by improving the air choke valve in the sealing assembly, the sealing performance of the sealing assembly is better, the deformation capability of the air choke valve in resisting the center normal direction is obviously improved, the air choke valve is not easy to turn over, and the air leakage risk of the air choke valve is greatly reduced; moreover, the eversion of the air-blocking valve is effectively prevented, so that the back part of the air-blocking valve scraped by the edge and corner structure of the surgical instrument is reduced, the cracking and damage of the air-blocking valve are avoided, and the sealing performance of the abdominal puncture outfit is ensured;

(2) according to the sealing assembly for the abdominal cavity puncture outfit, a plurality of wrinkles extending from the center of the valve wall to the periphery are uniformly distributed on the valve wall, each wrinkle is composed of a convex rib arranged on the inner side of the valve wall and a groove arranged on the outer side of the valve wall and corresponding to the convex rib in position and shape, and under the condition of frequent friction, extrusion force and stretching force, the wrinkle structure can effectively reduce the deformation amplitude of the air blocking valve; the convex ribs can effectively reduce the contact surface between the choke valve and the instrument, thereby reducing the friction force for leading in the instrument and reducing the operation blocking feeling; meanwhile, the fold structure can provide sufficient material supplement in the deformation process of the inner diameter of the choke valve, so that the risk of damage of the choke valve is effectively reduced;

(3) according to the sealing assembly for the abdominal cavity puncture outfit, the folds of the sealing assembly are bent on the valve wall in the same direction around the central axis of the valve wall, the line type of the folds is a three-dimensional reducing spiral line, the radius of the three-dimensional reducing spiral line is increased progressively from the outer periphery of the valve wall to the central direction, the complexity of the mechanical property of the air lock valve in the using process is fully considered, the mechanical property of the air lock valve in the original shape is kept in the using process by utilizing the regular change of the three-dimensional reducing spiral line and combining the generalized hooke's law, and the deformation and the eversion of the air lock valve are further prevented;

(4) according to the sealing assembly for the abdominal cavity puncture outfit, the sealing lip at the central opening of the valve wall is provided with the horn-shaped outward turning structure, a plurality of small convex ribs extending along the central axis of the sealing lip are uniformly distributed on the horn-shaped outward turning structure of the sealing lip, the horn-shaped outward turning structure at the central opening of the valve wall is opposite to the integral horn-shaped structure of the choke valve in direction, and the normal pressure of the sealing lip and the contact surface of an apparatus is effectively reduced; in addition, by the design of the small convex ribs, the contact area between the sealing lip and the instrument is further reduced when the instrument is drawn out, the frictional resistance when the instrument is drawn out is reduced, and the eversion possibility of the choke valve is further reduced;

(5) according to the sealing assembly for the abdominal cavity puncture outfit, the height of the small convex rib relative to the horn-shaped surface of the sealing lip is reduced along with the reduction of the radial dimension of the sealing lip until the height of the small convex rib relative to the horn-shaped surface of the sealing lip is zero, so that the air tightness of the sealing lip is not influenced, and the friction resistance of the instrument during extraction is effectively reduced;

(6) according to the sealing assembly for the abdominal cavity puncture outfit, the conical protection device which is formed by interweaving a plurality of protection leaves and covers the inner side of the valve wall is further arranged on the inner side of the air lock valve, the periphery of the protection device is clamped by the valve ring A and the valve ring B and is arranged in the cavity which is defined by the upper part of the valve wall and the elastic skirt edge, the air lock valve is protected to a certain extent by the protection leaves, and the friction force between the air lock valve and the protection leaves on the upper part is reduced due to the corrugated structure arranged on the air lock valve, so that the flexible action between the sealing valve assemblies in the use process is ensured, and the blocking feeling of the operation of an instrument is reduced; and the sealing assembly has simple and compact structure.

Drawings

FIG. 1 is a schematic view of the overall structure of a laparoscopic puncture instrument according to the present invention;

FIG. 2 is a schematic view of a disassembled structure of the abdominal cavity puncture outfit of the present invention;

FIG. 3 is a schematic cross-sectional view of an abdominal cavity puncture outfit of the present invention;

FIG. 4 is a schematic structural view of the lancet assembly of the present invention;

FIG. 5 is a schematic structural view of the puncture head of the present invention;

FIG. 6 is a schematic structural view of a sealing valve assembly of the present invention;

FIG. 7 is an exploded view of the sealing valve assembly of the present invention;

FIG. 8 is a schematic cross-sectional view of the sealing valve assembly of the present invention;

FIG. 9 is a schematic view of an angled configuration of the choke valve of the present invention;

FIG. 10 is a schematic view of another angle configuration of the choke valve of the present invention;

FIG. 11 is a schematic cross-sectional view of a choke valve of the present invention;

FIG. 12 is a schematic view of the connection structure of the moving cover and the choke valve according to the present invention;

FIG. 13 is a schematic structural view of a sheath assembly according to the present invention;

FIG. 14 is a schematic cross-sectional view of a sheath assembly according to the present invention;

FIG. 15 is a schematic view of an angle of the object extraction valve of the present invention;

fig. 16 is a schematic view of another angle of the fetching valve of the present invention.

The reference numerals in the schematic drawings illustrate:

1. an introducer needle assembly; 1-1, puncturing a core rod; 1-2, puncturing head; 1-2-1, lance wall; 1-2-2, side edge; 1-2-3, tip; 1-3, a mandrel base; 1-4, an instrument passage port; 1-5, fixing a lock catch by an instrument; 1-6, taking the needle and fastening; 1-7, reinforcing convex ribs;

2. a sealing valve assembly; 2-1, an upper cover; 2-1-1, concave structure; 2-2, a lower cover; 2-2-1, rolling surfaces; 2-3, a choke valve; 2-3-1, valve wall; 2-3-2, an elastic skirt; 2-3-3, opening; 2-3-4, folding; 2-3-5, a cavity; 2-3-6, connecting hole; 2-3-7, sealing lip; 2-3-8 parts of small convex ribs; 2-3-9, a positioning ring; 2-4, protecting leaves; 2-5, a movable cover; 2-6, A valve ring; 2-7, B valve ring;

3. a sheath assembly; 3-1, a sheath; 3-2, a sheath tube seat; 3-2-1, operating a handle; 3-2-2, a threading hole; 3-3, a fetching valve; 3-3-1, valve clack; 3-3-2, valve port; 3-3-3, mounting edges; 3-3-4, inner wall reinforcing ribs; 3-3-5 parts of outer wall reinforcing ribs; 3-3-6, positioning blocks; 3-4, an air injection valve; 3-5, anti-skid lines; 3-6, pressing rings.

Detailed Description

For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

Examples

Referring to fig. 1, fig. 2 and fig. 3, the abdominal cavity puncture outfit of the present embodiment includes a puncture needle assembly 1, a sealing valve assembly 2 and a sheath assembly 3 which can be assembled together in sequence, and the connection and assembly structure of the puncture needle assembly 1, the sealing valve assembly 2 and the sheath assembly 3 is similar to that of the existing puncture outfit, for example, the puncture needle assembly 1 and the sealing valve assembly 2 can be connected by a snap structure, and the sealing valve assembly 2 and the sheath assembly 3 can be connected by a rotary snap structure. When the puncture outfit is used, firstly, the abdominal cavity puncture outfit is assembled into the state shown in fig. 1, namely, after the sealing valve assembly 2 and the sheath tube assembly 3 are assembled, the puncture needle assembly 1 sequentially penetrates through the sealing valve assembly 2 and the sheath tube assembly 3, and the sheath tube assembly 3 is inserted into human tissues under the guidance of the puncture needle assembly 1 to establish pneumoperitoneum; then the puncture needle assembly 1 is drawn out, the sealing is realized by the fetching valve 3-3 in the sheath tube assembly 3, then the surgical operation is carried out by the surgical instrument through the sealing valve assembly 2 and the sheath tube assembly 3, and the sealing is formed by the air choke valve 2-3 in the sealing valve assembly 2 and the side wall of the instrument; when it is desired to remove surgically excised tissue, the sealing valve assembly 2 is removed and the excised tissue is removed through the access valve 3-3 using an instrument such as a biopsy forceps.

As shown in fig. 3 and 4, the puncture needle assembly 1 includes a puncture core bar 1-1 and a puncture head 1-2 disposed at one end of the puncture core bar 1-1, and unlike the existing conical puncture head structure, the puncture head 1-2 of the present embodiment is provided with two curved lance walls 1-2-1 (as shown in fig. 5), the two lance walls 1-2-1 gradually decrease from the rear portion of the puncture head 1-2 to the front portion to form a tip 1-2-3, and the two lance walls 1-2-1 intersect at two sides to form a side blade 1-2-2. The puncture head 1-2 in the embodiment is similar to a spearhead type structure, two sides of the puncture head are unfolded to form spears with edges, and the spears are gathered forwards to form sharp spikes, so that the whole puncture head 1-2 is of a streamline or side-flat structure, resistance is reduced when puncture motion advances, normal pressure of reaction force acting on the puncture head during puncture is effectively reduced, the spikes are sharp, and the penetrating power is strong. In addition, the puncture needle assembly 1 also comprises a core rod seat 1-3 which is arranged at one end of the puncture core rod 1-1 far away from the puncture head 1-2, the puncture core rod 1-1 is hollow, an instrument channel port 1-4 communicated with the puncture core rod 1-1 is arranged at the top of the core rod seat 1-3, an instrument fixing lock catch 1-5 used for fixing an instrument is arranged on the core rod seat 1-3, and a needle taking buckle 1-6 used for connecting or separating with the sealing valve assembly 2 is also arranged on the core rod seat 1-3. In the embodiment, the preferred inclination of 5-60 degrees is arranged at the 1-4 position of the instrument channel port, and the best inclination of 15-45 degrees is used for facilitating the introduction of the instrument; the upper parts of the core rod seats 1 to 3 are round and smooth, so that an operator can conveniently grasp the core rod seats during puncturing, the convenience of the operation is improved, and the puncturing risk is reduced. When the puncture needle is used, a camera tool extends into the puncture core rod 1-1 from the instrument channel opening 1-4, after the camera tool reaches a set position, the position of the camera tool is fixed by utilizing the instrument fixing lock catch 1-5, the camera tool can be conveniently placed, and the tissues can be more conveniently and clearly observed through the camera tool by combining the regular shape of the puncture head 1-2, so that organ tissues are effectively protected during puncture; the lancet assembly 1 can be removed from the sealing valve assembly 2 by pressing the needle extraction snaps 1-6. It should be understood that when a camera is needed to be used for puncture, the puncture head 1-2 is made of transparent material. In addition, in order to prevent the problem of broken shell when the puncture needle is taken out in an operation, reinforcing convex ribs 1-7 are also arranged on the core rod seat 1-3 and positioned at the periphery of the needle taking buckle 1-6, so that the circumferential antiskid and structural strength of the puncture needle assembly 1 are increased, and the appearance of the core rod seat 1-3 has higher identification degree. As for the structural principles of the instrument fixing lock 1-5 and the needle taking buckle 1-6 are similar to the prior art, the detailed description is omitted.

As shown in fig. 6, 7, 8 and 9, the sealing valve assembly 2 includes a choke valve 2-3 disposed in the valve body, the choke valve 2-3 includes a valve wall 2-3-1 having an opening 2-3-3 at the center and having an integral trumpet-shaped structure, the valve body of the sealing valve assembly 2 includes an upper cover 2-1 and a lower cover 2-2, the choke valve 2-3 is clamped between the upper cover 2-1 and the lower cover 2-2 by the outer periphery of a wavy elastic skirt 2-3-2 disposed at the periphery of the valve wall 2-3-1, the valve wall 2-3-1 and the elastic skirt 2-3-2 are preferably integrally formed, and the material of the choke valve 2-3 is preferably rubber or silicone rubber, the wavy elastic skirt 2-3-2 is used to provide mechanical support for the valve wall 2-3-1, the valve wall 2-3-1 is suspended in the center of the upper cover 2-1 and the lower cover 2-2, and has no contact with the upper cover 2-1 and the lower cover 2-2, no friction, and certain axial moving space for the choke valve 2-3. Most importantly, as shown in FIG. 11, the slope of the trumpet-shaped valve wall 2-3-1 gradually decreases from the central opening 2-3-3 of the valve wall 2-3-1 to the periphery of the valve wall 2-3-1, i.e., the valve wall 2-3-1 gradually changes from the central opening 2-3-3 of the valve wall 2-3-1 to the periphery of the valve wall 2-3-1, the slope is the slowest at the maximum diameter and the slope is the steepest at the minimum diameter. Experiments show that the steeper the gradient of the valve wall 2-3-1 at the central opening 2-3-3, which is close to the sealing lip 2-3-7 of the sealing ring structure, the more remarkable the sealing lip 2-3-7 resists deformation in the direction of the central normal, and the less easy the sealing lip 2-3-7 turns upwards; compared with the existing inverted cone-shaped valve wall structure, the problem that the sealing lip 2-3-7 of the choke valve 2-3 turns upwards in use is effectively solved. As the operator of the instrument is aware of, when the operator of the instrument uses the instrument, the upturning of the sealing lip 2-3-7 can increase the friction force for leading in the instrument, after the upturning of the sealing lip 2-3-7, the original deformation capability of the air choke valve 2-3 is reduced, the central opening 2-3-3 is reduced, and the air choke valve is easy to be hooked by edges and corners of instruments such as a suturing nail, a hemostatic forceps and the like, which greatly influences the usability of the instrument. According to the abdominal cavity puncture outfit, the structure of the air-blocking valve 2-3 is improved, so that the sealing performance of the air-blocking valve 2-3 is better, the deformation capability of the air-blocking valve 2-3 in the direction resisting the central normal is obviously improved, the air-blocking valve 2-3 is not easy to turn upwards, and the air leakage risk of the air-blocking valve 2-3 is greatly reduced; and because the gas barrier valve 2-3 is effectively prevented from turning outwards, the back of the gas barrier valve 2-3 scraped by the edge structure of the surgical instrument is reduced, the gas barrier valve 2-3 is prevented from cracking and damaging, and the sealing performance of the abdominal puncture outfit is ensured.

As shown in fig. 9 and 10, in order to further prevent the choke valve 2-3 from turning outwards, in the present embodiment, a plurality of creases 2-3-4 extending from the center of the valve wall 2-3-1 to the periphery are uniformly distributed on the valve wall 2-3-1, and preferably, the creases 2-3-4 are formed by ribs arranged on the inner side of the valve wall 2-3-1 (the inner side of the valve wall 2-3-1 can be referred to as "male surface") and grooves arranged on the outer side of the valve wall 2-3-1 (the outer side of the valve wall 2-3-1 can be referred to as "female surface") corresponding to the positions and shapes of the ribs. Further preferably, the above-mentioned fold 2-3-4 adopts a spiral structure, the fold 2-3-4 is bent on the valve wall 2-3-1 in the same direction around the central axis of the valve wall 2-3-1, and macroscopically forms a three-dimensional reducing spiral line type, the radius of the three-dimensional reducing spiral line increases from the outer periphery of the valve wall 2-3-1 to the central direction, the convex rib and the concave groove forming the fold 2-3-4 are respectively attached to the male surface and the female surface of the valve wall 2-3-1, the spiral radius increases from the outer periphery to the center according to an equation, and the spiral line equation:

x²+y²＝r²；

z＝k·[2π+arctan(y/x)]；

wherein r is the radius of the helix; k 2 pi is the distance of rise in the z axis per revolution; k and r are both constants.

The design of the spiral wrinkles 2-3-4 is based on the generalized Hooke's law, the three-dimensional reducing spiral line and the modern theory of solid friction, the complexity of the mechanical property of the air lock valve 2-3 in the using process is fully considered, the regular change of the three-dimensional reducing spiral line is utilized and combined with the generalized Hooke's law, and the design and analysis result shows that the deformation amplitude of the air lock valve 2-3 can be reduced well even under the frequent friction force, extrusion force and stretching force, and the original shape is kept to have the mechanical property. In the using process, the instrument enters from the bell mouth of the air lock valve 2-3, and in the process of entering the sealing lip 2-3-7, the convex rib on the male surface provides a smaller contact surface, so that the friction force introduced into the instrument is reduced; in addition, in the process of introducing the instrument, the inner diameter of the bell mouth of the air lock valve 2-3 is enlarged, and the fold structure can provide sufficient material supplement in the process of deformation of the inner diameter of the air lock valve 2-3, so that the risk of breakage of the air lock valve is effectively reduced.

In addition, as shown in fig. 10 and 11, the sealing lip 2-3-7 at the central opening 2-3-3 of the valve wall 2-3-1 in the embodiment has a trumpet-shaped outward turning structure, and a plurality of small convex ribs 2-3-8 extending along the central axis of the sealing lip 2-3-7 are uniformly distributed on the trumpet-shaped outward turning structure of the sealing lip 2-3-7. It is known that under the influence of the displacement of the instrument, the "female" face of the sealing lip 2-3-7 must contact with the instrument to generate friction, and when the friction force exceeds the dynamic friction range, the friction is converted into static friction, so that the sealing lip 2-3-7 is turned upwards to influence the service performance of the choke valve 2-3. In the structure of the sealing lip 2-3-7 in the embodiment, the direction of the trumpet-shaped outward-turning structure of the central opening 2-3-3 of the valve wall 2-3-1 is opposite to that of the integral trumpet-shaped structure of the air lock valve 2-3, the normal pressure of the contact surface of the sealing lip 2-3-7 and an instrument is reduced through the trumpet-shaped structure, meanwhile, a plurality of small convex ribs 2-3-8 which extend along the central axis of the sealing lip 2-3-7 are designed and uniformly distributed on the 'female surface' of the sealing lip 2-3-7 from the lower part of the main sealing surface, namely on the trumpet-shaped outward-turning structure of the sealing lip 2-3-7, 15-25 small convex ribs 2-3-8 are preferably arranged, and the small convex ribs 2-3-8 are characterized in that: the height of the small convex rib 2-3-8 relative to the trumpet-shaped surface of the sealing lip 2-3-7 is reduced along with the reduction of the radial dimension of the sealing lip 2-3-7 until the height of the trumpet-shaped surface relative to the sealing lip 2-3-7 is zero, and the small convex rib 2-3-8 of the structure can not only not influence the air tightness of the sealing lip 2-3-7, but also effectively reduce the friction resistance of the instrument to be drawn out. Through the design of the small convex ribs 2-3-8, the contact area between the sealing lips 2-3-7 and the instrument is further reduced when the instrument is drawn out, the frictional resistance when the instrument is drawn out is reduced, and the possibility of eversion of the choke valve is further reduced.

As shown in fig. 7 and 8, the inner side of the choke valve 2-3 in this embodiment is further provided with a tapered protection device covered on the inner side of the valve wall 2-3-1 and formed by interweaving a plurality of protection leaves 2-4, the protection leaves 2-4 are preferably 4, the 4 protection leaves 2-4 are interlaced with each other to form a tapered structure, the periphery of the protection device is clamped by the valve ring a 2-6 and the valve ring B2-7 and is installed in the cavity 2-3-5 enclosed by the upper part of the valve wall 2-3-1 and the elastic skirt 2-3-2, specifically, the valve ring a 2-6 and the valve ring B2-7 are provided with connecting columns and connecting holes which are matched with each other, the valve ring a 2-6 and the valve ring B2-7 clamp and fix the periphery of the protection leaves 2-4 by the splicing and matching of the connecting columns and the connecting holes, the valve ring A2-6 and the choke valve 2-3 are also in fit connection through a connecting column and a connecting hole. The protective leaves 2-4 are utilized to protect the air lock valve 2-3 to a certain extent, and the corrugated structure arranged on the air lock valve 2-3 also reduces the friction force between the air lock valve 2-3 and the protective leaves 2-4 on the upper part, ensures the flexible action between the sealing valve components 2 in the using process and reduces the blocking feeling of the operation of the instrument. In addition, referring to fig. 6, 7, 8 and 12, the choke valve 2-3 in this embodiment is further provided with a movable cover 2-5 covering the outside of the valve wall 2-3-1 and having an opening in the center, the outer side surface of the movable cover 2-5 is a spherical surface, the inner wall of the lower through hole of the lower cover 2-2 can be matched with the spherical surface outside the movable cover 2-5, and preferably, a circle of spherical rolling surface 2-2-1 can be provided at the inner wall of the lower through hole of the lower cover 2-2 to enable the movable cover 2-5 to perform relative rolling movement on the lower cover 2-2; the diameter of the movable cover 2-5 is larger than that of the through hole at the lower part of the lower cover 2-2, and the diameter of the opening of the movable cover 2-5 is smaller than that of the through hole at the lower part of the lower cover 2-2. Specifically, a plurality of connecting columns are arranged at the upper part of the movable cover 2-5, and connecting holes 2-3-6 matched and connected with the connecting columns are arranged on the air choke valve 2-3; in order to better coaxially position the movable cover 2-5 and the choke valve 2-3 and prevent the movable cover 2-5 and the choke valve 2-3 from being dislocated relatively during use, a circle of positioning ring 2-3-9 is further arranged on the outer side of the choke valve 2-3, and the positioning ring 2-3-9 is matched with and limited by a positioning ring on the movable cover 2-5. The movable cover 2-5 is matched with the inner wall of the lower through hole of the lower cover 2-2 in a rolling way, so that the air choke valve 2-3 can have a universal rotating function in the sealing valve assembly 2, and the flexible operation of instruments is facilitated; and the rigidity constraint of the choke valve 2-3 in each direction in the use range is zero, thereby providing excellent operability for operators and avoiding the problem of sealing failure of the choke valve 2-3 caused by breakthrough of product limit in the similar products. In order to facilitate the instruments to extend into the sealing valve assembly 2 for surgical operation, the upper opening of the upper cover 2-1 is further provided with a concave structure 2-1-1 for smooth introduction of the instruments.

As shown in fig. 3, 13 and 14, the sheath assembly 3 comprises a sheath 3-1, a sheath seat 3-2 disposed at one end of the sheath 3-1, and a fetching valve 3-3 disposed in the sheath seat 3-2, wherein the sheath 3-1 and the sheath seat 3-2 are formed in an integral structure to ensure the air tightness of the sheath 3-1; the anti-slip grains 3-5 are further arranged on the periphery of the sheath tube 3-1, the anti-slip grains 3-5 are utilized to increase the resistance of the sheath tube 3-1 in the puncturing process, the damage to organs caused by the fact that the puncture outfit punctures too deeply due to the fact that the resistance is suddenly reduced when penetrating tissues is effectively prevented, and the use is safer and more reliable. A sheath tube seat 3-2 of the sheath tube component 3 is also provided with a gas injection valve 3-4 communicated with the sheath tube 3-1, so that pneumoperitoneum operation is facilitated; the two sides of the sheath tube seat 3-2 are also provided with operating handles 3-2-1 which are convenient to hold, the operating handles 3-2-1 are provided with threading holes 3-2-2 which are convenient for connecting and fixing, so that an operator can conveniently hold and operate, and in order to adapt to different operation requirements, a method for fixing the sheath tube 3-1 and the skin surface of a patient by using a suture line is provided for the operator, so that the operation convenience is improved.

Referring to fig. 14, 15 and 16, in the present embodiment, the fetching valve 3-3 in the sheath assembly 3 adopts a three-petal structure, and compared with a duckbill fetching valve, a radial channel of the fetching valve is further enlarged, so that convenience of fetching the excised tissue is improved, difficulty and time of the operation are reduced, and operation risk is reduced; compared with a four-flap type fetching valve, the fetching valve 3-3 is high in structural strength, few in incision and better in sealing performance. Specifically, in this embodiment, the fetching valve 3-3 includes three valve flaps 3-3-1, each valve flap 3-3-1 includes a valve side wall and a valve bottom wall connected to the valve side wall into a whole, the valve side walls of the three valve flaps 3-3-1 are connected into a whole, three valve ports 3-3-2 extending from the center to the connecting edge of the valve side wall are formed in the valve bottom wall of the three valve flaps 3-3-1, and an included angle of the three valve ports 3-3-2 is preferably 120 °. The outer side of each valve clack 3-3-1 is provided with an outer wall reinforcing rib 3-3-5 extending from the valve bottom wall to the outer edge of the valve side wall, the inner side of each valve clack 3-3-1 is provided with an inner wall reinforcing rib 3-3-4 positioned on the connecting edge of the valve bottom wall and the valve side wall, and the outer wall reinforcing rib 3-3-5 and the inner wall reinforcing rib 3-3-4 ensure the stability of the shape of each valve clack 3-3-1, ensure the natural closing of the valve port 3-3-2 of the fetching valve 3-3, and prevent the valve bottom wall of the valve clack 3-3-1 from turning outwards to cause sealing failure. In addition, the outer wall reinforcing ribs 3-3-5 extend to the outer edge of the valve side wall from the valve bottom wall, the overall strength of the object taking valve 3-3 is improved, the stability and the reliability of the structure are improved, the rebound rate is improved, the self-tightness of the object taking valve 3-3 is improved, the inner wall reinforcing ribs 3-3-4 are arranged on the connecting edge of the valve bottom wall and the valve side wall, the size of the inner wall reinforcing ribs 3-3-4 is small, the space inside the object taking valve 3-3 is not occupied, meanwhile, the interference of hook hanging and the like to the operation of instruments is avoided, and the practicability is higher. In addition, the valve side wall of each valve flap 3-3-1 is inwardly curved, and the slope of the valve side wall gradually decreases from the bottom of the valve side wall toward the outer edge of the valve side wall, which contributes to the improvement in the deformation resistance and resilience of the valve flap 3-3-1. In order to facilitate the installation of the fetching valve 3-3 in the sheath tube seat 3-2, the outer edge of the valve side wall of the three-flap valve flap 3-3-1 is also provided with a circle of installation edge 3-3-3, the fetching valve 3-3 can be fixed in the sheath tube seat 3-2 through a compression ring 3-6, and the bottom of the installation edge 3-3-3 is also provided with a positioning block 3-3-6, so that the fetching valve 3-3 is convenient to fix in position, simple in structure and convenient to install.

According to the sealing assembly for the abdominal cavity puncture outfit, the air blocking valve in the sealing assembly is improved, so that the sealing performance of the sealing assembly is better, the deformation capability of the air blocking valve in resisting the center normal direction is obviously improved, the air blocking valve is not easy to turn upwards, and the air leakage risk of the air blocking valve is greatly reduced; meanwhile, the sealing assembly is simple and compact in structure, small in resistance to instruments and more flexible and convenient in instrument operation.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Claims

1. A sealing component for a peritoneal puncture outfit comprises an upper cover (2-1), a lower cover (2-2) and a choke valve (2-3), wherein the choke valve (2-3) comprises a valve wall (2-3-1) and a wavy elastic skirt edge (2-3-2) arranged on the periphery of the valve wall (2-3-1), the center of the valve wall (2-3-1) is provided with an opening (2-3-3), and the choke valve (2-3) is clamped between the upper cover (2-1) and the lower cover (2-2) through the periphery of the elastic skirt edge (2-3-2), and is characterized in that: the valve wall (2-3-1) is of an integral trumpet-shaped structure, and the gradient of the trumpet-shaped valve wall (2-3-1) is gradually reduced from the central opening (2-3-3) of the valve wall (2-3-1) to the periphery of the valve wall (2-3-1); a plurality of wrinkles (2-3-4) extending from the center of the valve wall (2-3-1) to the periphery are uniformly distributed on the valve wall (2-3-1), and the wrinkles (2-3-4) are formed by convex ribs arranged on the inner side of the valve wall (2-3-1) and grooves arranged on the outer side of the valve wall (2-3-1) and corresponding to the positions and shapes of the convex ribs;

the sealing lip (2-3-7) at the central opening (2-3-3) of the valve wall (2-3-1) is provided with a trumpet-shaped outward turning structure, and a plurality of small convex ribs (2-3-8) extending along the central axis of the sealing lip (2-3-7) are uniformly distributed on the trumpet-shaped outward turning structure of the sealing lip (2-3-7); the height of the small convex rib (2-3-8) relative to the trumpet-shaped surface of the sealing lip (2-3-7) is reduced along with the reduction of the radial dimension of the sealing lip (2-3-7) until the height of the trumpet-shaped surface relative to the sealing lip (2-3-7) is zero.

2. A seal assembly for a laparoscopic puncture instrument according to claim 1, wherein: the wrinkles (2-3-4) are bent around the central axis of the valve wall (2-3-1) in the same direction on the valve wall (2-3-1), the line type of the wrinkles (2-3-4) is a three-dimensional reducing spiral line, and the radius of the three-dimensional reducing spiral line is gradually increased from the outer periphery of the valve wall (2-3-1) to the central direction.

3. A seal assembly for a laparoscopic puncture instrument according to claim 1 or 2, wherein: the inner side of the choke valve (2-3) is also provided with a conical protection device which is formed by interweaving a plurality of protection blades (2-4) and covers the inner side of the valve wall (2-3-1), the periphery of the protection device is clamped by a valve ring A (2-6) and a valve ring B (2-7) and is arranged in a cavity (2-3-5) surrounded by the upper part of the valve wall (2-3-1) and the elastic skirt edge (2-3-2).

4. A seal assembly for a laparoscopic puncture instrument according to claim 3, wherein: the valve wall (2-3-1) and the elastic skirt edge (2-3-2) are of an integrally formed structure.