CN107115135B - abdominal cavity puncture outfit with improved sealing assembly - Google Patents
abdominal cavity puncture outfit with improved sealing assembly Download PDFInfo
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- CN107115135B CN107115135B CN201710438331.7A CN201710438331A CN107115135B CN 107115135 B CN107115135 B CN 107115135B CN 201710438331 A CN201710438331 A CN 201710438331A CN 107115135 B CN107115135 B CN 107115135B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3478—Endoscopic needles, e.g. for infusion
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3498—Valves therefor, e.g. flapper valves, slide valves
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B2017/3419—Sealing means between cannula and body
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Abstract
The invention discloses an abdominal cavity puncture outfit with an improved sealing assembly, and belongs to the field of medical instruments. The abdominal cavity puncture outfit of the invention, the valve wall slope of the choke valve is gradually reduced from the valve wall central opening to the valve wall periphery, the sealing lip at the valve wall central opening has a trumpet-shaped outward turning structure, and a plurality of small convex ribs are uniformly distributed on the trumpet-shaped outward turning structure of the sealing lip; get the thing valve and include the three lamella valve clacks, every lamella valve clack all includes valve side wall and valve bottom wall, and the valve side wall of three lamella valve clacks is connected in an organic whole, has seted up three valve port on the valve bottom wall of three lamella valve clacks, and the outside of every lamella valve clack all is equipped with the outer wall strengthening rib that extends to valve side wall periphery department by valve bottom wall, and the inboard of every lamella valve clack all is equipped with the inner wall strengthening rib that is located valve bottom wall and valve side wall connection limit. The improved air-blocking valve is matched with the fetching valve, the air-blocking valve is not easy to turn upwards, the fetching valve has a large radial channel and is convenient to operate, so that the abdominal cavity puncture outfit has better sealing performance and more flexible and convenient operation.
Description
Technical Field
The present invention relates to an abdominal cavity puncture instrument, and more particularly, to an abdominal cavity puncture instrument with an improved seal assembly.
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 three parts of a puncture needle, a sealing valve and a puncture sheath tube, wherein a choke valve in the sealing valve and a fetching valve in the puncture sheath tube form a sealing assembly in the puncture outfit; after the puncture needle is taken out, an operation channel is formed by the sealing valve and the puncture sheath tube, the laparoscopic operation can be carried out by inserting the surgical instrument into the abdominal cavity through the sealing valve and the puncture sheath tube, the fetching valve in the puncture sheath tube is in an open state, and the pneumoperitoneum sealing is realized by the side wall of the instrument and the air blocking valve in the sealing valve. 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.
therefore, the air blocking valve and the fetching valve are two key sealing elements in the abdominal cavity puncture outfit, and the air blocking valve and the fetching valve are matched to meet the operation requirement in the operation. Therefore, the performance of the air blocking valve and the fetching valve is directly related to the smooth completion of the operation.
The search shows that the existing abdominal cavity puncture outfit also has a structure of an air blocking valve and a fetching valve with superior performance. For example, in chinese patent No. ZL200510062967.3, the publication date is 6/17 in 2009, and the name of the invention creation is: 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, greatly reduces strain in the system during instrument insertion by breaking the seal into multiple parts, effectively reduces 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 choke valve, there is also related improved technology disclosure, such as chinese patent number ZL201320161408.8, the publication date of grant is 12 months and 25 days in 2013, the name of 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.
For the fetching valve structure, in Chinese patent number ZL200410092185.X, the date of the issue of grant is 2008, 4 months and 2 days, the name of the invention is: in the application of the multi-angled duckbill seal assembly, there is described an access valve structure for a laparoscopic puncture instrument, the duckbill seal assembly including first and second seal bodies extending from an annular flange member, distal ends of the first and second seal bodies intersecting to define an engagement surface to allow passage of an instrument therethrough, the engagement surface being closed by the resiliency of the first and second seal bodies in the absence of an instrument. Further details regarding the duckbill seal assembly described above can also be found in U.S. patent application No. US20090005799a 1. The fetching valve with the structure has a good sealing effect, but has certain defects, and is mainly embodied in that the opening ranges of the first sealing body and the second sealing body of the duckbill-shaped sealing assembly are small, so that great interference exists in the operation of cutting off tissues, the operation difficulty and the operation time are increased, and the operation risk is increased.
To the above-mentioned little problem of opening that gets thing valve existence, also have three lamella formulas and four petal formulas to get thing valve structure at present and disclose, the opening of these two kinds of thing valves of getting is bigger than duckbilled shape and gets the thing valve to be convenient for more the operation, and because the increase of getting thing valve opening quantity, get thing valve wall intensity and reduce, thereby air tightness performance also has certain decline. The Chinese patent number ZL201110454669.4 is published as 2012, 5 and 2, and the name of the invention is: a three lamella seal valves for abdominal cavity puncture ware, this application relates to a three lamella seal valve for abdominal cavity puncture ware, including three lamella seal valve bodies, three lamella seal valve body one end is equipped with the joint edge, and the other end is pincher trees shape and three incision in addition, at the internal surface of valve body, corresponds every incision and is equipped with the supplementary muscle of airtight of axial placement. The three air-tight auxiliary ribs solve the problem that gaps exist when the three-piece sealing valve is naturally closed after incision, and further enhance the natural closing performance of the three-piece sealing valve after incision, so that the incision channel of the three-piece sealing valve can be automatically closed when instruments are replaced in the operation process; preventing the cut part of the three-valve sealing valve from turning back along the pulling direction of the appliance when the appliance is pulled out, thereby leading CO in the abdominal cavity of the human body2The gas is protected, and the CO in the abdominal cavity of the human body is effectively prevented2Leakage of gas. In the application, although the airtight auxiliary rib and the reinforcing rib are adopted to solve the problem that the strength of the valve wall is reduced and the untight closing is easy to occur, on one hand, the airtight auxiliary rib occupies the space inside the valve body and reduces the available space inside the fetching valve because the airtight auxiliary rib is arranged on the inner surface of the valve body and the reinforcing rib is arranged on the outer surface of the valve body; on the other hand, because the instrument passes through the inside of the object taking valve to reach the outside to realize the object taking operation, in the operation process, the airtight auxiliary rib on the inner side easily blocks the instrument from passing through, and causes hooking and the like on the instrument, thereby being not beneficial to the normal operation of the operation.
Disclosure of Invention
1. technical problem to be solved by the invention
The invention aims to overcome the defects of the sealing assembly of the existing abdominal cavity puncture outfit and provides the abdominal cavity puncture outfit with the improved sealing assembly, and by adopting the technical scheme of the invention, the air blocking valve and the fetching valve in the sealing assembly are improved, so that the air blocking valve is not easy to turn upwards, the air leakage risk of the air blocking valve is greatly reduced, the radial channel of the fetching valve is further enlarged, the convenience for fetching excised tissues is improved, the sealing failure caused by the outward turning of the fetching valve is effectively prevented, and the fetching valve cannot interfere with the operation of instruments; the improved air blocking valve is matched with the fetching valve, so that the sealing performance of the abdominal cavity puncture outfit is better, and the operation is more flexible and convenient.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
The invention discloses an abdominal cavity puncture outfit with an improved sealing assembly, which comprises a sealing valve assembly and a sheath pipe assembly, wherein the sealing valve assembly and the sheath pipe assembly are detachably connected, the sealing valve assembly comprises an upper cover, a lower cover and a choke valve, the choke valve is clamped between the upper cover and the lower cover through the periphery of a wavy elastic skirt edge arranged on the periphery of the choke valve, the sheath pipe assembly comprises a sheath pipe, a sheath pipe seat arranged at one end of the sheath pipe and a fetching valve arranged in the sheath pipe seat, wherein:
the choke valve comprises a valve wall which is provided with an opening at the center and is of an integrated trumpet-shaped structure, and the gradient of the valve wall is gradually reduced from the central opening of the valve wall to the periphery of the valve wall; the sealing lip at the central opening of the valve wall is provided with a horn-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 horn-shaped outward turning structure of the sealing lip;
get thing valve include the three lamella valve clacks, every lamella valve clack all include the valve side wall and with valve side wall connection in the valve bottom wall of an organic whole, the valve side wall connection in an organic whole of three lamella valve clacks, set up by the center to the three valve port that the connection limit direction of valve side wall extends on the valve bottom wall of three lamella valve clacks, the outside of every lamella valve clack all is equipped with the outer wall strengthening rib that extends to valve side wall periphery department by the valve bottom wall, the inboard of every lamella valve clack all is equipped with the inner wall strengthening rib that is located valve bottom wall and valve side wall connection limit.
as a further improvement of the invention, a plurality of creases extending from the center of the valve wall to the periphery are uniformly distributed on the valve wall of the choke valve, and the creases are formed by convex ribs arranged on the inner side of the valve wall and grooves arranged on the outer side of the valve wall and corresponding to the positions and shapes of the convex ribs.
As a further improvement of the invention, 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, the radius of the three-dimensional reducing spiral line is increased from the outer circumferential direction of the valve wall to the central direction according to an equation, and the equation of the three-dimensional reducing spiral line is as follows:
x2+y2＝r2；
z＝k·[2π+arctan(y/x)]；
wherein r is the radius of the helix; k 2 pi is the distance of rising on the z axis per rotation; k and r are both constants.
as a further improvement of the invention, the inner side of the choke valve is also provided with a conical protection device which is formed by interweaving a plurality of protection leaves 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.
As a further improvement of the invention, the outer side of the choke valve is also provided with a movable cover which is covered on the outer side of the valve wall and has an opening in the center, the outer side surface of the movable cover is a spherical surface, and the inner wall of the lower through hole of the lower cover can be matched with the outer spherical surface of the movable cover, so that the movable cover can perform relative rolling motion on the lower cover.
as a further improvement of the invention, the height of the small convex rib on the sealing lip relative to the trumpet-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 trumpet-shaped surface relative to the sealing lip is zero.
As a further improvement of the invention, the gradient of the valve side wall of the fetching valve is gradually reduced from the bottom of the valve side wall to the outer edge of the valve side wall.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
(1) according to the abdominal cavity puncture outfit with the improved sealing assembly, the air blocking valve and the fetching valve in the sealing assembly are improved, so that the air blocking valve is not easy to turn up, the air leakage risk of the air blocking valve is greatly reduced, the radial channel of the fetching valve is further enlarged, the convenience for fetching and cutting tissues is improved, the sealing failure caused by the outward turning of the fetching valve is effectively prevented, and the fetching valve cannot interfere with the operation of instruments; the improved air-blocking valve is matched with the fetching valve, so that the sealing performance of the abdominal cavity puncture outfit is better, and the operation is more flexible and convenient;
(2) According to the abdominal cavity puncture outfit with the improved sealing assembly, a plurality of folds extending from the center of the valve wall to the periphery are uniformly distributed on the valve wall of the air-blocking valve, and under the condition of frequent friction, extrusion force and stretching force, the fold structure can effectively reduce the deformation amplitude of the air-blocking valve; the contact surface between the air-blocking valve and the instrument can be effectively reduced by the convex ribs on the inner side of the folds, so that the introduced friction force of the instrument is reduced, and the operation blocking feeling is reduced; 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 abdominal cavity puncture outfit with the improved sealing assembly, the folds of the abdominal cavity puncture outfit 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 design of the shape of the folds fully considers the complexity of the mechanical property of the air lock valve in the use process, the regular change of the three-dimensional reducing spiral line is utilized and the generalized hooke's law is combined, so that the original shape of the air lock valve is kept in the use process and the deformation and the eversion of the air lock valve are further prevented;
(4) According to the abdominal cavity puncture outfit with the improved sealing assembly, the conical protection device which is formed by interweaving a plurality of protection blades and covers the inner side of the valve wall is further arranged on the inner side of the air lock valve, and the protection blades are utilized to play a certain protection role on the air lock valve, so that the air lock valve is effectively prevented from being damaged and leaking air; the outer side of the choke valve is also provided with a movable cover which is covered on the outer side of the valve wall and is provided with an opening in the center, under the mechanical support of the wavy elastic skirt edge, the choke valve can have a universal rotation function in the sealing valve assembly by utilizing the rolling fit of the movable cover and the inner wall of the lower through hole of the lower cover, so that the flexible operation of instruments is facilitated, the rigid constraint of the choke valve in each direction in the use range is zero, the excellent operability is provided for an operator, and the problem of sealing failure of the choke valve caused by breakthrough of product limitation in the similar products is avoided;
(5) According to the abdominal cavity puncture outfit with the improved sealing assembly, the height of the small convex rib on the sealing lip relative to the trumpet-shaped surface of the sealing lip is reduced along with the reduction of the radial size of the sealing lip until the height of the small convex rib relative to the trumpet-shaped surface of the sealing lip is zero, the small convex rib cannot influence the air tightness of the sealing lip, the friction resistance of the instrument is effectively reduced, and the possibility of deformation and eversion of the air lock valve is further reduced;
(6) the invention discloses an abdominal cavity puncture outfit with an improved sealing assembly, wherein the gradient of a valve side wall of an extraction valve is gradually reduced from the bottom of the valve side wall to the outer edge of the valve side wall, which is helpful for improving the deformation resistance and resilience of a valve clack.
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, 2 and 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, wherein the sealing valve assembly 2 and the sheath assembly 3 are detachably connected, 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. While the above is directed to an arrangement of an introducer needle assembly 1 for use with the present invention, the present invention is not limited to such an arrangement as may be used with a laparoscopic introducer needle having an improved seal assembly.
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 of the choke valve 2-3, 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. The air choke valve 2-3 in the embodiment has better sealing performance, obviously improves the deformation resistance of the air choke valve 2-3 in the direction of the central normal, ensures that the air choke valve 2-3 is not easy to turn over, and greatly reduces the air leakage risk of the air choke valve 2-3; 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 abdominal cavity puncture outfit with the improved sealing assembly, the air blocking valve and the fetching valve in the sealing assembly are improved, so that the air blocking valve is not easy to turn up, the air leakage risk of the air blocking valve is greatly reduced, the radial channel of the fetching valve is further enlarged, the convenience for fetching and cutting tissues is improved, the sealing failure caused by the outward turning of the fetching valve is effectively prevented, and the fetching valve cannot interfere with the operation of instruments; the improved air blocking valve is matched with the fetching valve, so that the sealing performance of the abdominal cavity puncture outfit is better, and the operation is more flexible and convenient.
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 (5)
1. a peritoneal puncture instrument with an improved sealing assembly comprises a sealing valve component (2) and a sheath component (3), the sealing valve component (2) is detachably connected with the sheath pipe component (3), the sealing valve component (2) comprises an upper cover (2-1), a lower cover (2-2) and a choke valve (2-3), the choke valve (2-3) is clamped between the upper cover (2-1) and the lower cover (2-2) through the periphery of a wave-shaped elastic skirt edge (2-3-2) arranged on the periphery of the choke valve (2-3), sheath pipe subassembly (3) include sheath pipe (3-1), locate sheath pipe seat (3-2) of sheath pipe (3-1) one end and locate getting thing valve (3-3) in sheath pipe seat (3-2), its characterized in that:
The choke valve (2-3) comprises a valve wall (2-3-1) which is provided with an opening (2-3-3) at the center and is of an integral trumpet-shaped structure, and the gradient of the 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); 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, 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), and the height of the small convex ribs (2-3-8) on the sealing lip (2-3-7) relative to the trumpet-shaped surface of the sealing lip (2-3-7) is reduced along with the reduction of the radial size 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; the outer side of the choke valve (2-3) is also provided with a movable cover (2-5) which covers the outer side of the valve wall (2-3-1) and is provided with an opening in the center, the outer side surface of the movable cover (2-5) is a spherical surface, and the inner wall of a through hole at the lower part of the lower cover (2-2) can be matched with the spherical surface at the outer side of the movable cover (2-5) so that the movable cover (2-5) can perform relative rolling motion on the lower cover (2-2);
The fetching valve (3-3) comprises three valve clacks (3-3-1), each valve clack (3-3-1) comprises a valve side wall and a valve bottom wall connected with the valve side wall into a whole, the valve side walls of the three valve clacks (3-3-1) are connected into a whole, three valve ports (3-3-2) extending from the center to the direction of the connecting edge of the valve side walls are formed in the valve bottom wall of the three valve clacks (3-3-1), outer wall reinforcing ribs (3-3-5) extending from the valve bottom wall to the outer edge of the valve side walls are arranged on the outer sides of each valve clack (3-3-1), and inner wall reinforcing ribs (3-3-4) located on the connecting edge of the valve bottom wall and the valve side walls are arranged on the inner sides of each valve clack (3-3-1).
2. A laparoscopic puncture instrument with an improved seal assembly according to claim 1, wherein: a plurality of wrinkles (2-3-4) extending from the center to the periphery of the valve wall (2-3-1) are uniformly distributed on the valve wall (2-3-1) of the choke valve (2-3), 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.
3. A laparoscopic puncture instrument with an improved seal assembly according to claim 2, 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, the radius of the three-dimensional reducing spiral line is increased from the outer periphery of the valve wall (2-3-1) to the central direction according to an equation, and the equation of the three-dimensional reducing spiral line is as follows:
x2+y2=r2；
z=k·[2π+arctan（y/x）]；
Wherein r is the radius of the helix; k 2 pi is the distance of rising on the z axis per rotation; k and r are both constants.
4. a laparoscopic puncture instrument with an improved seal assembly according to claim 3, 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).
5. A laparoscopic puncture instrument with an improved seal assembly according to claim 1, wherein: the gradient of the valve side wall of the fetching valve (3-3) is gradually reduced from the bottom of the valve side wall to the outer edge of the valve side wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710438331.7A CN107115135B (en) | 2017-06-12 | 2017-06-12 | abdominal cavity puncture outfit with improved sealing assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710438331.7A CN107115135B (en) | 2017-06-12 | 2017-06-12 | abdominal cavity puncture outfit with improved sealing assembly |
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| CN107115135A CN107115135A (en) | 2017-09-01 |
| CN107115135B true CN107115135B (en) | 2019-12-17 |
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| CN201710438331.7A Expired - Fee Related CN107115135B (en) | 2017-06-12 | 2017-06-12 | abdominal cavity puncture outfit with improved sealing assembly |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108553149B (en) * | 2018-05-11 | 2021-02-05 | 青岛市妇女儿童医院（青岛市妇幼保健院、青岛市残疾儿童医疗康复中心、青岛市新生儿疾病筛查中心） | Puncture probe for pediatric internal medicine |
| CN108771560A (en) * | 2018-06-29 | 2018-11-09 | 广东弘和医疗器械制造有限公司 | Laparoscope puncture outfit |
| CN113520537B (en) * | 2020-04-22 | 2023-04-11 | 麦德莱(苏州)医疗科技有限公司 | Puncture outfit for operation |
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| CN106175846A (en) * | 2016-08-02 | 2016-12-07 | 成都五义医疗科技有限公司 | A kind of perforator sealing system of fold-type |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20120108905A1 (en) * | 2010-10-28 | 2012-05-03 | Tyco Healthcare Group Lp | Portal apparatus with a contoured compliant seal |
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| CN101478924A (en) * | 2006-04-18 | 2009-07-08 | 伊西康内外科公司 | Pleated trocar seal |
| CN201079631Y (en) * | 2007-10-18 | 2008-07-02 | 周泰立 | Improved one-way valve for puncturing device |
| CN201389062Y (en) * | 2009-01-23 | 2010-01-27 | 周星 | Universal trough type radial gasket ring for puncture outfit and puncture outfit |
| CN201461935U (en) * | 2009-07-30 | 2010-05-12 | 南方天合底盘系统有限公司 | High-intensity sealing leather collar |
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| CN107115135A (en) | 2017-09-01 |
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Granted publication date: 20191217 |