CN212592330U - Laparoscope puncture outfit and sealing assembly thereof - Google Patents

Abstract

The application discloses peritoneoscope puncture ware and seal assembly thereof, wherein peritoneoscope puncture ware includes: the puncture needle comprises a puncture sleeve which is vertically arranged, a sealing assembly which is arranged at the top of the puncture sleeve, a puncture rod which is vertically inserted into the sealing assembly and the puncture sleeve, and a gas injection valve which is connected with the puncture sleeve; the seal assembly includes: the sealing element shell is sequentially arranged on an upper retaining ring, a flexible sealing gasket and a lower retaining ring from top to bottom in the sealing element shell; the flexible sealing gasket is of an integrated structure and comprises a conical surface part with a downward tip end, and the tip end of the conical surface part is provided with a first through hole which is vertically communicated and has a hole diameter smaller than the diameter of the puncture rod. The sealing assembly of the laparoscope puncture outfit has the advantages of simple structure, good sealing effect and stable performance.

Description

Laparoscope puncture outfit and sealing assembly thereof

Technical Field

The application relates to a surgical device, in particular to a laparoscope puncture outfit and a sealing assembly thereof.

Background

In recent decades, Chinese medicine is gradually becoming in orbit with the world's stage. The occurrence of minimally invasive surgery enables more and more patients to be cured of the disease more optimally. In minimally invasive surgery, pneumoperitoneum is required to be performed in the abdominal cavity of a patient. The pneumoperitoneum is an important link in the laparoscopic surgery, and the laparoscopic puncture outfit is a medical instrument for building the pneumoperitoneum. Good gas tightness and gas barrier properties are the basis for establishing pneumoperitoneum. CO2 gas is injected into the human body through an air injection valve on the puncture outfit to form pneumoperitoneum.

In order to prevent accidental injury of human tissues in the puncture process, visual puncture gradually occurs in the prior art, an endoscope enters from a puncture rod and observes the puncture process while puncturing, so that the endoscope is safer and more reliable, the risk is reduced, and the endoscope is more humanized in design for doctors and accords with the concept of modern minimally invasive surgery.

The laparoscope puncture outfit mainly comprises a puncture sleeve, a sealing component, a puncture rod and an air injection valve, wherein after the puncture rod (or a surgical instrument) is inserted into the sealing component and the puncture sleeve, the sealing component can seal an insertion channel of the puncture rod (or the surgical instrument), prevent foreign matters in the environment, particularly infection sources, from entering the body of a patient from the puncture sleeve, and simultaneously prevent gas in the abdominal cavity from overflowing outwards.

The puncture outfits on the market are different in types, but the sealing components on the puncture outfits have the problems of complex structure, poor sealing performance and the like.

Disclosure of Invention

The purpose of this application is: to the problem, a peritoneoscope puncture ware and seal assembly thereof is proposed, this application this kind of peritoneoscope puncture ware's seal assembly simple structure, sealed effectual, the stable performance.

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

a laparoscopic puncture instrument comprising:

a puncture cannula which is vertically arranged is arranged,

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

a puncture rod vertically inserted in the seal assembly and the puncture cannula, an

The gas injection valve is connected with the puncture sleeve;

the seal assembly includes:

a seal housing, and

the upper retaining ring, the flexible sealing gasket and the lower retaining ring are sequentially arranged in the sealing element shell from top to bottom;

the flexible sealing gasket is of an integrated structure and comprises a conical surface part with a downward tip end, and the tip end of the conical surface part is provided with a first through hole which is vertically communicated and has a hole diameter smaller than the diameter of the puncture rod.

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

the flexible sealing gasket comprises an annular flange which is integrally arranged at the opening of the lower end of the first through hole and protrudes downwards.

And a hard anti-turnover protective sheet is clamped between the upper retaining ring and the flexible sealing gasket and comprises a spherical part protruding downwards, and the center of the spherical part is vertically penetrated with a second through hole with the aperture larger than that of the first through hole.

The upper retaining ring is integrally provided with a plurality of inserting columns which extend downwards and are arranged at intervals along the circumferential direction, the top surface of the lower retaining ring is provided with a plurality of inserting slots which are recessed downwards and are arranged at intervals along the circumferential direction, the flexible sealing gasket is provided with a plurality of first positioning holes which are vertically communicated and are arranged at intervals along the circumferential direction, the overturn-preventing protection sheet is provided with a plurality of second positioning holes which are vertically communicated and are arranged at intervals along the circumferential direction, and the inserting columns sequentially penetrate through the second positioning holes and the first positioning holes from top to bottom and are then fixedly inserted into the inserting slots.

Flexible sealing pad include an organic whole encircle in the partial outlying thickening ring of circular conical surface, first locating hole is located on the thickening ring, the outer fringe limit an organic whole that prevents turning over the bluff piece sets up the outside location lug that stretches out of a plurality of, forms a location opening between arbitrary two adjacent location lugs, the top an organic whole of thickening ring sets up the convex location boss that makes progress of a plurality of, forms a positioning groove between arbitrary two adjacent location bosses, the embedding of location boss in the location opening, the embedding of location lug is in the positioning groove.

The positioning lug is provided with a positioning notch which is concave downwards, the upper retaining ring is integrally provided with a positioning lug which protrudes downwards, the positioning lug is embedded into the positioning notch, and the depth of the positioning groove is equal to the thickness of the positioning lug.

The sealing element shell comprises an upper shell body and a lower shell body which are detachably connected, wherein vertical through holes are formed in the upper shell body and the lower shell body, the first through holes of the flexible sealing gaskets are coaxially arranged with the through holes, and the outer edge of each flexible sealing gasket is clamped and arranged between the upper shell body and the lower shell body.

The outer rim of the flexible gasket comprises:

a ring of horizontally extending horizontal circular rims, an

A circle of vertical circular ring edge integrally connected to the periphery of the horizontal circular ring edge and vertically extending downwards;

go up the casing and include the vertical last clamping ring that stretches out downwards of round, the casing includes the vertical lower clamping ring that upwards stretches out of round down, vertical ring limit elasticity paste to lean on overlap in it is peripheral to push down the ring, horizontal ring limit by vertical clamp go up the clamping ring with between the clamping ring down.

The flexible sealing gasket comprises a fold ring arranged around the periphery of the thickening ring.

A seal assembly of a laparoscopic puncture instrument comprising:

a seal housing, and

the upper retaining ring, the flexible sealing gasket and the lower retaining ring are sequentially arranged in the sealing element shell from top to bottom;

the flexible sealing gasket is of an integrated structure and comprises a conical surface part with a downward tip end, and the tip end of the conical surface part is provided with a first through hole which is vertically communicated and has an aperture smaller than the diameter of the puncture rod.

The application has the advantages that:

1. sealing assembly's flexible sealing pad is an overall structure in this application, and only the vertical through-hole that is provided with a less through-hole that link up in its central point, after puncture rod (or medical instrument) inserted flexible sealing pad's central through-hole, the through-hole pore wall and puncture rod body pole wall elasticity extrusion contact, form sealedly. The other parts of the flexible sealing gasket are of solid structures, so that the problem of air leakage is avoided.

2. The flexible sealing gasket is provided with a conical surface part with a downward tip, and a central through hole is arranged at the bottom tip position of the conical surface part. When the puncture rod is inserted downwards and moves, the inclined plane at the upper part of the conical surface part can guide the rod head to move towards the central through hole at the center and finally penetrate downwards from the central through hole, so that the puncture rod is prevented from puncturing the position of the non-through hole of the flexible sealing gasket to puncture the flexible sealing gasket when inserted downwards.

3. The flexible sealing gasket is integrally arranged at a hole at the lower end of the central through hole and is provided with a downward protruding annular flange. The annular flange not only has a structure reinforcing effect, reduces the possibility that the central through hole is torn, but also increases the axial dimension of the central through hole, further increases the extrusion contact area with the hole wall of the central through hole when the puncture rod (or medical appliance) is inserted, and improves the sealing capability.

4. When the medical staff upwards draws out the puncture rod, the conical surface part of the flexible sealing gasket is blocked by the spherical surface part of the anti-overturn protection sheet when upwards deforming, so that the conical surface part cannot be overturned.

5. The flexible sealing gasket has a thickening ring surrounding the periphery of the conical surface part of the flexible sealing gasket, and is provided with a protrusion, a groove, a hole and other various positioning structures on the thickening ring, the anti-turning protective sheet is correspondingly provided with a corresponding positioning structure, the flexible sealing gasket is convenient to assemble, the anti-turning protective sheet is convenient to assemble, the local pressure of the upper retaining ring on the flexible sealing gasket can be reduced, meanwhile, the pressure bearing part of the flexible sealing gasket is the thickening ring with high thickness and strength, the flexible sealing gasket is not easy to damage, and the service life is prolonged.

6. The outer edge of the flexible sealing gasket is composed of a specially-made horizontal circular ring edge and a special vertical circular ring edge, the horizontal circular ring edge is sealed and clamped between an upper pressing ring of an upper shell of the sealing element and a lower pressing ring of a lower shell of the sealing element, and the vertical circular ring edge is elastically attached to and sleeved on the periphery of the lower pressing ring, so that the sealing performance of the matching part of the flexible sealing gasket and a sealing element shell is greatly improved.

7. The flexible sealing gasket is provided with a plurality of circles of fold rings, so that the radial deformability of the flexible sealing gasket is greatly improved, the vertical circular ring edge can be very conveniently sleeved on the periphery of the lower compression ring, and the assembly efficiency is accelerated.

Drawings

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

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

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

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

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

FIG. 6 is a schematic diagram of the structure of a flexible gasket in an embodiment of the present application;

FIG. 7 is a schematic structural view of an upper seat body of the rod seat in the embodiment of the present application;

FIG. 8 is an exploded view of the penetration rod in an embodiment of the present application;

FIG. 9 is an exploded view of the puncture cannula of the puncture instrument in accordance with the embodiment of the present application;

FIG. 10 is a schematic view of the inner structure of the puncture cannula in the embodiment of the present application, in which the upper half of the upper housing of the rod housing is removed;

FIG. 11 is a schematic view of the engagement of the puncture cannula with the seal assembly in an embodiment of the present application;

FIG. 12 is a schematic view showing the structure of a rotating ring in the embodiment of the present application;

FIG. 13 is a schematic structural view of an upper base of the socket of the present embodiment;

FIG. 14 is a schematic view of the structure of the puncture cannula engaged with the air injection valve in the embodiment of the present application;

FIG. 15 is a schematic structural diagram of a valve core of the gas injection valve in the embodiment of the present application;

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

100-puncture cannula, 200-sealing component, 300-puncture rod and 400-gas injection valve;

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

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

1021 a-jack, 1021 b-rotation stopping limiting block and 1021 c-spring abutting table;

1022 a-connecting pipe, 1022a-1 is a mounting groove;

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

201-sealing piece shell, 202-upper retaining ring, 203-flexible sealing pad, 204-anti-turnover protecting sheet, 205-lower retaining ring;

2011-upper shell, 2012-lower shell;

2011 a-upper pressure ring, 2011 b-neck;

2012 a-lower press ring, 2012 b-latch, 2012b-1 is a chuck;

2021-insert post, 2022-positioning lug;

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

2031 a-annular flange;

2033 a-a first positioning hole, 2033 b-a positioning boss, 2033 c-a positioning groove and 2033 d-a positioning notch;

2041-a second positioning hole, 2042-a spherical part, 2043-a second through hole, 2044-a positioning lug and 2045-a positioning notch;

301-shaft, 302-head, 303-shaft seat;

3011-injection molding a fabrication hole;

3021-cutting edge;

3031-rod seat upper seat body, 3032-rod seat lower seat body, 3033-turnover pressure tongue, 3034-elastic clamping strip;

3031 a-upper seat body through pipe, 3031 b-abdicating gap, 3031 c-reinforcing rib, 3031 d-pressing gap;

3032 a-lower seat body through pipe;

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

3034 a-top arm, 3034 b-side arm, 3034b-1 is a clamping edge;

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

4021-valve core rod, 4022-rotary handle;

4021a vent hole, 4021b arc protrusion.

4011-limit projection;

4041-glue groove, 4042-assembling boss.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. The present application may be embodied in many different forms and is not limited to the embodiments described in the present embodiment. The following detailed description is provided to facilitate a more thorough understanding of the present disclosure, and the words used to indicate orientation, top, bottom, left, right, etc. are used solely to describe the illustrated structure in connection with the accompanying figures.

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

Furthermore, the technical features, aspects or characteristics described herein may be combined in any suitable manner in one or more embodiments. It will be readily appreciated by those of skill in the art that the order of the steps or operations of the methods associated with the embodiments provided herein may be varied. Thus, any sequence in the figures and examples is for illustrative purposes only and does not imply a requirement in a certain order unless explicitly stated to require a certain order.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

Fig. 1 to 16 show a preferred embodiment of the puncture outfit for laparoscope of the present application, which is mainly composed of a puncture cannula 100, a sealing assembly 200, a puncture rod 300 and an air injection valve 400. Wherein the sealing assembly 200 is detachably connected to the top end of the puncture cannula 100, the gas injection valve 400 is installed at one side of the top of the puncture cannula 100, and the puncture rod 300 is movably inserted into the sealing assembly 200 and the puncture cannula 100. Specifically, the method comprises the following steps:

the puncture cannula 100 includes a tube body 101 vertically extending from top to bottom and a hub 102 fixedly attached to the top end of the tube body. Wherein, the tube body 101 and the tube seat 102 are provided therein with a vertical passage for inserting the piercing rod 300, i.e., a piercing rod insertion passage. For the convenience of holding, a plurality of annular convex ribs surrounding the periphery of the tube body are formed on the outer surface of the tube body 101, and the annular convex ribs are sequentially and uniformly distributed from top to bottom. Moreover, the annular convex ridge can increase the friction force between the cannula and the abdominal cavity incision wall, and prevent the puncture cannula from being separated from the human body in the operation process.

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

The sealing assembly 200 is detachably connected to the top of the socket 102 by a snap-fit structure. When the puncture rod 300 is inserted into the sealing assembly 200 and the puncture cannula 100 from top to bottom in sequence, so that the puncture instrument can be used to puncture the skin of a patient and enter the abdominal cavity, the sealing assembly 200 can seal the insertion channel of the puncture rod 300, and prevent foreign matters in the environment, particularly infection sources, from entering the body of the patient from the puncture cannula 100. After the puncture and the pneumoperitoneum are established, if a medical instrument for operation is inserted into the seal assembly 200 and the puncture cannula 100 in this order, the seal assembly 200 also seals an insertion channel (the same as the insertion channel of the puncture rod) of the medical instrument in preparation for a laparoscopic operation, thereby preventing foreign matter, particularly an infection source, in the environment from entering the patient from the puncture cannula 100 during the preparation for an operation and the operation.

The puncture rod 300 comprises a hollow rod body 301, a rod head 302 fixed at the lower end of the rod body, and a rod seat 303 fixed at the upper end of the rod body and provided with a vertical insertion hole. An endoscope channel for inserting an endoscope is arranged in the rod body 301, the rod head 302 and the rod seat 303, and comprises a hollow part of the rod body 301, a vertical insertion hole of the rod seat 303 and a slot on the rod head. The rod head 302, also called a bayonet head, is of a substantially pointed and tapered configuration, and has a surface with an outwardly convex cutting edge 3021, and an insertion groove for disposing an endoscope lens is provided therein, the insertion groove being formed recessed downward from the top of the bayonet head. The rod seat 303 is provided with a holding handle for medical staff to hold, so that the puncture rod is convenient to insert and extract, and the medical staff is convenient to puncture the abdominal skin of the operated person. In order to prevent the puncture rod 300 from separating from the sealing assembly 200 and the puncture cannula 100 during the puncturing process, i.e. moving upwards, and ensure the puncturing is performed smoothly, the embodiment further provides a connecting mechanism for detachably and fixedly connecting the rod seat 303 with the sealing assembly 200, and the specific structural form of the connecting mechanism is described later.

The gas injection valve 400 is arranged at the side part of the tube seat 102 of the puncture cannula 100 and is used for connecting a CO2 gas supply device so as to inject CO2 gas into the abdominal cavity of an operator to establish pneumoperitoneum. The insufflation valve 400 has two operating states, open and closed, and only when insufflation is performed will the insufflation valve 400 be opened, otherwise the insufflation valve 400 is closed to prevent foreign objects, especially sources of infection, from entering the puncture outfit and even the abdominal cavity through the insufflation valve, and simultaneously prevent gas in the abdominal cavity from overflowing.

In this embodiment, the sealing assembly 200 includes a sealing housing 201 with a substantially circular ring structure, and an upper retaining ring 202, a rollover prevention plate 204, a flexible sealing pad 203 and a lower retaining ring 205 are fixedly mounted in the sealing housing 201, which are sequentially arranged from top to bottom. Wherein the upper snap ring 202 and the lower snap ring 205 are detachably fastened up and down, and the flexible gasket 203 and the anti-rollover protective sheet 204 are sandwiched between the upper snap ring 202 and the lower snap ring 205. Specifically, the method comprises the following steps:

in order to facilitate installation of the anti-rollover protective sheet 204, the flexible gasket 203, and the lower retaining ring 205 in the sealing housing 201, the sealing housing 201 in this embodiment is composed of an upper housing 2011 and a lower housing 2012 that are fastened to each other and detachably and fixedly connected together. The upper housing 2011 and the lower housing 2012 are both provided with vertically through insertion holes therein, and the insertion holes are coaxially arranged with the first through holes of the upper snap ring, the lower snap ring, the flexible gasket 203 and the second through holes of the anti-turnover protective sheet 204, so as to allow a puncture rod or a medical instrument to penetrate therethrough. A plurality of downward-extending insertion posts 2021 are integrally provided on the upper snap ring 202, and the insertion posts 2021 are uniformly spaced along the circumferential direction. Correspondingly, the flexible sealing gasket 203 is provided with a plurality of vertically through first positioning holes 2033a, the anti-overturn protection plate 204 is provided with a plurality of vertically through second positioning holes 2041, the top surface of the lower retaining ring 205 is provided with a plurality of downwardly concave slots (not shown in the figure), and the first positioning holes 2033a, the second positioning holes 2041 and the slots are uniformly arranged at intervals along the circumferential direction. The insertion post 2021 of the upper snap ring 202 sequentially passes through the second positioning hole 2041 and the first positioning hole 2033a from top to bottom, and then is fixedly (interference-) inserted into the slot of the lower snap ring 205. The first positioning hole 2033a on the flexible sealing gasket 203 is matched with the inserting column 2021 for fixing the position of the flexible sealing gasket 203 and preventing the flexible sealing gasket 203 from moving in the circumferential direction or the radial direction. The second positioning hole 2041 of the anti-overturn protection sheet 204 is matched with the insertion column 2021, and is used for fixing the position of the anti-overturn protection sheet 204 and preventing the anti-overturn protection sheet 204 from moving circumferentially or radially.

The flexible sealing gasket 203 is of an integrated structure, is made of soft deformable rubber, has a circular outer contour, and is vertically provided with a small circular first through hole 2031 in the center, wherein the aperture of the first through hole 2031 is smaller than the diameter of the rod body 302 of the puncture rod 300, and is also smaller than the diameter of a medical instrument which needs to extend into the abdominal cavity during an operation. After the puncture rod 300 (or medical device) is inserted into the first through hole 2031 of the flexible sealing gasket 203, the first through hole 2031 is elastically expanded and deformed, and the hole wall of the first through hole 2031 is elastically pressed and contacted with the rod wall of the puncture rod body 301 to form a seal.

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

In order to further enhance the sealing performance of the flexible sealing gasket 203 against the insertion channel of the puncture rod 300 (or medical instrument), the flexible sealing gasket 203 of the present embodiment includes an annular flange 2031a integrally provided at the lower end aperture of the first through hole 2031 and protruding downward. This annular flange 2031a not only has the structure reinforcing effect, has reduced the possibility that first through-hole 2031 is torn, but also has increaseed the axial dimension of first through-hole 2031, and then increases puncture rod 300 (or medical instrument) when inserting with the extrusion area of contact of first through-hole 2031 pore wall, promote sealing capacity.

When the medical staff draws the puncture rod 300 upward, the conical surface portion 2032 is easily turned over upward by the friction force between the puncture rod wall and the first through hole wall, and the tip of the conical surface portion 2032 and the first through hole 2031 at the center are located above the conical surface portion 2032 after the conical surface portion 2032 is turned over, in this case, if the puncture rod or the medical instrument is inserted downward again, the conical surface portion 2032 cannot guide the lower end of the puncture rod or the medical instrument to move to the first through hole 2031 at the center, but can guide the puncture rod or the medical instrument to the side of the conical surface portion 2032 in the opposite direction, so that the insertion of the puncture rod or the medical instrument is very difficult, and even the flexible sealing gasket 203 is punctured to lose the sealing performance. The above-mentioned anti-turnover shield 204 disposed above the flexible seal 203 just solves this problem:

the anti-turnover protective plate 204 is made of a rigid plastic material, a spherical portion 2042 protruding downward is disposed in the middle of the anti-turnover protective plate, a second through hole 2043 having a diameter larger than that of the first through hole 2031 is vertically disposed through the center of the spherical portion 2042, and the second through hole 2043 and the first through hole 2031 are coaxially disposed one above the other.

In practical applications, when the medical staff withdraws the puncture rod 300 upward, the conical surface portion 2032 of the flexible sealing gasket 203 is blocked by the spherical surface portion 2041 of the anti-turnover protecting sheet 204 when being deformed upward (upturning deformation), so that the conical surface portion 2032 cannot be turned upside down.

Moreover, in order to facilitate the mutual alignment of the anti-rollover protective sheet 204 and the flexible gasket 203 and then to be sleeved on the insertion post 2021 of the upper snap ring 202, the structure of the anti-rollover protective sheet 204 and the flexible gasket 203 is improved as follows:

the flexible gasket 203 further includes a ring of thickened circular rings 2033 with a large thickness integrally surrounding the periphery of the conical surface portion 2032, four positioning bosses 2033b protruding upwards are integrally formed at the top of the thickened circular rings 2033, and the four positioning bosses 2033b are uniformly arranged at intervals along the circumferential direction, so that one positioning groove 2033c is formed between any two adjacent positioning bosses 2033 b. Four (radially) positioning tabs 2044 extending outwards are integrally arranged at the outer edge of the anti-turnover guard plate 204, and the four positioning tabs 2044 are uniformly arranged at intervals along the circumferential direction, so that a positioning notch 2045 is formed between any two adjacent positioning tabs 2044.

During assembly, the positioning boss 2033b of the flexible gasket 203 is inserted into the positioning notch 2045 of the anti-turnover protection sheet 204, and at the same time, the positioning tab 2044 of the anti-turnover protection sheet 204 is just inserted into the positioning groove 2033c of the flexible gasket 203, so that the assembly positioning of the flexible gasket 203 and the anti-turnover protection sheet 204 is realized. At this time, the first through holes 2031 of the flexible gasket 203 are aligned with the second through holes 2041 of the anti-rollover flap 204, and the posts 2021 of the upper snap ring 202 can be inserted into the aligned first through holes 2031 and second through holes 2041 very conveniently.

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

So, after last buckle 202, anti-overturning protective sheet 204, flexible sealing gasket 203 and lower buckle 205 assembly are accomplished, flexible sealing gasket 203 only its thickening ring 2033 part receives vertical extrusion, and thickening ring 2033 has great thickness, so difficult damage after the pressurized has promoted life.

In this embodiment, each positioning boss 2033b is further provided with a positioning groove 2033d recessed downward, and the upper snap ring 202 is provided with four positioning protrusions 2022 protruding downward, and the positioning protrusions 2022 are respectively inserted into the positioning grooves 2033d, so as to position the assembly of the upper snap ring 202 and the flexible gasket 203.

Also, the groove depth of the positioning groove 2033c on the flexible mat seal 203 is equal to the thickness of the positioning tab 2044 on the anti-rollover patch 204 in the vertical direction. Thus, after the positioning lug 2044 is inserted into the positioning groove 2033c after assembly, the upper surface of the anti-turnover protection piece 204 is flush with the upper surface of the positioning boss 2033b, and the upper snap ring 202 is in flat contact with the anti-turnover protection piece 204 and the positioning boss 2033b, so that the upper snap ring 202 is prevented from pressing the positioning boss 2033b of the flexible gasket 203 too much, which causes the positioning boss 2033b to deform and break due to large-size downward recess.

It can be seen from the above that, after the upper retaining ring, the anti-overturn protection sheet, the flexible sealing gasket and the lower retaining ring are assembled in the sealing element shell, the flexible sealing gasket is tightly clamped between the anti-overturn protection sheet and the upper retaining ring, and the pressing contact surface of the flexible sealing gasket and the anti-overturn protection sheet and the pressing contact surface of the flexible sealing gasket and the upper retaining ring can keep good sealing without air leakage. However, if a good seal is not maintained between the outer rim of the flexible seal and the seal housing, the gas filling the patient's abdominal cavity may escape therefrom.

In view of the above problems, the embodiment further improves the sealing assembly 200 to ensure the sealing performance at the connection between the flexible sealing gasket 203 and the sealing member housing 201, and prevent air leakage at the joint between the flexible sealing gasket 203 and the sealing member housing 201, specifically:

in this embodiment, the outer edge of the flexible gasket 203 is sandwiched between the upper case 2011 and the lower case 2012. Further, the outer edge of the flexible sealing gasket 203 includes a horizontal circular ring edge extending horizontally and a vertical circular ring edge 2035 integrally connected to the periphery of the horizontal circular ring edge 2034 and extending vertically and downwardly. The upper casing 2011 includes an upper press ring 2011a extending vertically downward, the lower casing 2012 includes a lower press ring 2011a extending vertically upward, and the upper press ring 2011a and the lower press ring 2012a are both circular ring structures. After the assembly is completed, the vertical annular rim 2035 is elastically abutted (i.e., the two are not only arranged in an abutting manner, but also have a certain elastic extrusion force, so that the sealing performance between the sealing ring and the lower pressing ring can be improved) to be sleeved on the periphery of the lower pressing ring 2012a, and the horizontal annular rim is vertically clamped between the upper pressing ring 2011a and the lower pressing ring 2012 a. Obviously, this configuration greatly enhances the sealing of the flexible gasket 203 where it engages the seal housing 201.

If it is ensured that the vertical annular edge 2035 of the flexible gasket 203 can elastically abut against the periphery of the lower pressing ring 2012a after the assembly is completed, it is inevitably required that the inner diameter of the vertical annular edge 2035 in a natural state is smaller than the outer diameter of the lower pressing ring 2012 a. Obviously, this will increase the difficulty of mounting the flexible gasket 203 on the lower pressure ring 2012 a. In this regard, the present embodiment further optimizes and improves the structure of the flexible sealing gasket 203:

the flexible gasket 203 further includes a plurality of rings of corrugated rings 2036 circumferentially disposed around the outer periphery of the thickened ring 2033, and each ring of corrugated rings 2036 is circumferentially disposed from the inside to the outside in sequence. The corrugated ring 2036 greatly improves the radial deformability of the flexible gasket 203, so that the vertical annular edge 2035 can be easily fitted around the lower pressure ring 2012 a.

During the puncturing operation, an endoscope extending into the puncturing rod 300 needs to be disposed in order to observe the puncturing situation in real time and prevent the puncturing rod, particularly the rod head 302 of the puncturing rod, from scratching the tissues in the body. An endoscope used in laparoscopic surgery mainly comprises a thread guide rod and a lens mounted at the front end of the thread guide rod. Wherein, the wire rod is a hollow structure (tubular structure), a wire connected with the lens is arranged in the wire rod, and the rear end of the wire is connected with a computer (or other image processors). The camera lens at the front end transmits the collected image to the computer at the rear end through the wires in the wiring rod, and the image information in the abdominal cavity of the patient is displayed on the computer in real time.

In practical application, the endoscope, particularly the wiring rod of the endoscope, needs to be fixed relative to the puncture rod, so that the situation that the endoscope moves in the puncture process and cannot accurately and clearly acquire in-vivo images is avoided. The endoscope used in laparoscopic surgery is of a standard size and has a very thin wire rod. The diameter of the wire walking rod is smaller than the diameter of the inner hole of the puncture rod body 301, the wire walking rod is used for accommodating a puncture rod head 302 of a front-end lens of an endoscope, and the inner space (especially the bottom tip space) of the wire walking rod is smaller. Therefore, the endoscope routing rod is preferably arranged coaxially with the inner hole of the puncture rod body 301, because only this ensures that the lower lens is in a desired position in the rod head 302, and at the same time prevents bending deformation due to the routing rod.

In order to meet the above requirements, the conventional practice is: the bore diameter of the inner bore of the puncture rod base 303 is made small, the bore diameter is slightly larger than (basically equal to) the diameter of the endoscope wiring rod, and the inner bore of the rod base 303 is coaxial with the inner bore of the rod body 301. After the endoscope penetrates the puncture rod, the turning pressure tongue which is arranged on the rod seat 303 and is positioned on one side of the endoscope routing rod in the radial direction is utilized to press the routing rod against the hole wall of the inner hole of the rod seat, so that the routing rod is radially clamped between the turning pressure tongue and the inner hole wall of the puncture rod seat, and the endoscope is fixed.

If the connection strength and the smoothness of the connection part of the puncture rod body and the puncture rod seat are to be improved, the puncture rod body and the puncture rod seat are preferably integrally injection-molded. Therefore, in the conventional scheme, in order to fix the endoscope, the bore diameter of the inner bore of the rod base is smaller than that of the rod body, so that the integral injection molding of the rod base and the rod body can be realized by adopting a downward core pulling mode (namely, a forming core rod of an injection mold is pulled downwards), and the demolding is smooth.

In the conventional case where the shaft 301 and the shaft holder 303 of the puncture rod 300 have the above-described structure, the head 302 can generally be constructed only to be wrapped around the lower end of the shaft 301 because:

1. if the upper end of the rod head 302 is embedded inside the lower end of the rod body 301, the rod body cannot be used as an injection molding insert (in this case, the rod body needs to be made of metal material) to perform injection molding on the rod head 302, because the step at the connection between the inner hole of the rod seat 303 and the inner hole of the rod body 301 blocks the upward core pulling of the molding core rod, that is, the mold cannot complete the core pulling action.

2. If make the body of rod 302 alone, fixed cartridge with the pole head 302 of making is inside the tip under the body of rod 301 again, not only can lead to pole head 302 to take place to warp, influences its puncture performance, and mechanical grafting's connected mode must have the gap of certain size (gap opening direction level is outside) between pole head 302 and the body of rod 301 moreover, and the internal tissue of person operated in the actual application probably blocks into this gap, pulls the internal tissue, causes very big injury to the person operated.

Therefore, in the conventional scheme, the club head 302 is fixed on the lower end of the club body 301. This is because, although there is a gap between the club head 302 wrapped around the lower end of the club body 301 and the club body 301, the opening gap of the gap is upward, and the possibility that the vertical gap catches the tissues of the human body during use is relatively small, which is necessary. Still some producers can adopt the mode of moulding plastics to wrap up the pole head in body of rod periphery, but pole head surface protrusion in body of rod surface, can form annular step between the two, and when the puncture operation, this annular step also harms patient's internal tissue easily.

In addition, in the conventional scheme, no matter the club head 302 adopts an embedded installation structure or an outer wrapping installation structure, the connection strength between the club head and the club body is not high. In use, there is theoretically a possibility that the rod head 302 may fall off from the rod body 301, and although this possibility is small, once it occurs, a serious medical accident may be caused.

It is appreciated that the present embodiment solves the above problems very skillfully. In this embodiment, the base 303 is connected to the shaft 301 by injection molding, the rod 302 is connected to the shaft 301 by injection molding, and the rod 302 is embedded in the lower end of the shaft 301 by insert molding. Specifically, the method comprises the following steps:

the rod base 303 is composed of a rod base upper base 3031 and a rod base lower base 3032 which are detachably connected, the rod base upper base 3031 and the rod base lower base 3032 are both plastic parts, and the detachable connection mode of the rod base upper base 3031 and the rod base lower base 3032 can be screw connection or clamping connection. The rod body 301 is made of metal, when the puncture rod 300 is processed, the rod body 301 made of metal is placed in a cavity of an injection mold as an insert, the two ends of the rod body 301 are simultaneously subjected to injection molding to obtain the rod head 302 and the lower rod seat 3032, after the injection molding is finished, the lower part of the lower rod seat 3032 is sleeved outside the upper end part of the rod body 301, and the upper part of the rod head 302 is embedded inside the lower end part of the rod body 301. Because the bore diameters of the inner bores of the rod head 302, the rod body 301 and the rod base lower seat body 3032 are sequentially increased, after the injection molding is finished, the core rods which are positioned in the mold cavity and are inserted into the rod base lower seat body 3032, the rod body 301 and the rod head 302 can be smoothly drawn out (core-pulling).

The rod head 302 and the rod body 301 are connected in an injection molding mode, the connection strength of the rod head and the rod body is high, and the connection position is smooth and seamless. The rod seat lower seat body 3032 and the rod body 301 are also connected in an injection molding mode, the connection strength of the rod seat lower seat body and the rod body is high, and the connection position is smooth and seamless. The above problems are well overcome.

During injection molding, the lower end surfaces of the rod head 302 and the inner hole of the rod body 301 can be tightly attached only by controlling the structure and the process of the mold, and the outer surface of the rod head 302 and the outer surface (at the butt joint) of the rod body 301 are completely flush.

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

Similarly, an injection molding hole 3011 is also formed at the upper end of the rod 301, so that during the injection molding process, a portion of the rod seat lower seat body 3032 flows into the injection molding hole 3011 to form a plug embedded in the injection molding hole 3011, thereby further improving the bonding force between the rod seat lower seat body 3032 and the rod 301.

As can be seen from the above, the main reason why the club head 302, the club base lower seat 3032 and the club body 301 can be integrally connected by injection molding is that the inner bore diameters of the club head 302, the club body 301 and the club base lower seat 3032 are gradually increased. Thus, how should the endoscope be fixed during the puncture? The following structure is very skillfully adopted in the embodiment:

the rod seat upper seat body 3031 comprises an upper seat body through pipe 3031a which is arranged in the middle of the rod seat upper seat body 3031 and is provided with a vertical through hole (equivalent to the upper hole section of the inner hole of the traditional rod seat), the rod seat lower seat body 3032 comprises a lower seat body through pipe 3032a which is arranged in the middle of the rod seat lower seat body and is provided with a vertical through hole (equivalent to the lower hole section of the inner hole of the traditional rod seat), and after the upper seat body and the lower seat body are assembled together to form the rod seat 303, the upper seat body through pipe 3031a and the lower seat body through pipe 3032a are communicated up and down and are coaxially arranged to provide. Moreover, the aperture of the vertical through hole in the through pipe 3031a of the upper seat body is slightly larger than (basically equal to) the rod diameter of the wire rod of the endoscope, and obviously, the aperture of the vertical through hole in the through pipe 3031a of the upper seat body is smaller than that of the vertical through hole in the through pipe 3032a of the lower seat body. The tube wall of the lower end of the upper seat body through tube 3031a is provided with a circular arc-shaped notch along the circumferential direction, and the circular arc-shaped notch (width) extends to the lower end surface of the upper seat body through tube 3031a, so that a circular arc-shaped baffle 3031a-1 facing the circular arc-shaped notch is formed. The circular ring-shaped baffle is actually a part of the pipe wall of the upper seat body through pipe 3031a, and originally, when the circular arc-shaped notch is not cut, the circular ring-shaped baffle and the other part of the circular arc-shaped pipe wall which is not cut form a lower pipe section of the upper seat body through pipe 3031a together. The lower seat body 3032 of the rod seat is hinged with a turnover pressure tongue 3033 which can be turned over manually, and the turnover pressure tongue 3033 is provided with an actuating end 3033a which exposes the outer surface of the puncture rod seat 301 and a working end 3033b which extends into the circular arc-shaped notch. In practical application, a user presses the actuating end 3033a of the flip spatula 3033 to turn the flip spatula 3033, the working end 3033b of the flip spatula 3033 turns and moves close to the endoscope routing rod in the upper seat body through pipe 3031a, and the endoscope routing rod is pressed against the inner wall of the upper seat body through pipe 3031a, so that the endoscope routing rod is radially pressed and fixed between the flip spatula working end 3033b and the inner wall of the upper seat body through pipe 3031 a. The working end 3033b of the turnover spatula cooperates with the circular arc baffle 3031a-1 to clamp the wire rod of the endoscope.

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

In order to increase the pressing contact area between the working end 3033b of the turnover spatula and the wall of the endoscope routing rod, so as to reduce the pressure intensity between the working end 3033b of the turnover spatula and improve the static friction force between the working end 3033b of the turnover spatula and the wall of the endoscope routing rod, and prevent the hollow endoscope routing rod from collapsing and deforming radially inwards due to the extrusion of the turnover spatula, the working end 3033b-1 of the turnover spatula is provided with an arc-shaped groove.

To facilitate the user's actuation of the flip tab actuation end 3033a, this embodiment provides protective ribs on the surface of the flip tab actuation end 3033a to prevent slippage.

Also, the lever seat upper seat body 3031 is provided with a relief notch 3031b, and the flip tongue depressor actuation end 3033a is disposed in the relief notch 3031b for user contact actuation.

In order to prevent the upper seat through tube 3031a from deforming under long-term high-frequency pressure, the tube wall of the upper seat through tube 3031a is made very thick-thicker than the tube wall of the lower seat through tube 3032a, and two reinforcing ribs 3031c connected to the outer side of the upper seat through tube 3031a are integrally arranged on the rod seat upper seat 3031. The arc-shaped baffle 3031a-1 is a main pressure bearing part, so the two reinforcing ribs 3031c are specifically connected to the outer side of the arc-shaped baffle 3031 a-1.

As described above, to prevent the puncture rod 300 from being separated upward from the seal assembly 200 and the puncture cannula 100 during a puncture procedure, the present embodiment provides a connection mechanism for detachably and fixedly connecting the puncture rod holder 303 with the seal assembly 200, and the structure of the connection mechanism is described in detail below:

the top of the sealing element housing 201 (specifically, the upper housing 2011) is provided with two downward recessed clamping grooves 2011b, which are left and right, the rod seat upper seat body 3031 of the puncture rod seat 303 is fixedly provided with an elastic clamping strip 3034 made of plastic material, the outer contour of the elastic clamping strip 3034 is substantially in an inverted U shape, the elastic clamping strip includes a top arm 3034a and two side arms 3034b which integrally extend downward from the left end portion and the right end portion of the top arm respectively, the top arm 3034a is approximately in a circular ring structure, the lower end of each side arm 3034b is provided with a clamping edge 3034b-1 which extends outward along the radial direction of the lower seat body through pipe 3032a (i.e., the radial direction of the puncture cannula), and the top arm 3034a is fixedly connected with the rod seat upper seat body 3031 of the puncture rod seat 303. In practical use, a user can squeeze the two side arms 3034b of the elastic clamping strip 3034 inwards by using fingers to enable the two side arms 3034b to approach a distance from each other, then insert the side arms 3034b into the clamping grooves 2011b of the sealing element shell 201, release the fingers, relieve the left-right squeezing force applied to the elastic clamping strip 3034, keep the two side walls 3034b outwards away, clamp the clamping edges 3034b-1 at the end parts in the clamping grooves 2011b, and enable the elastic clamping strip 3034 to be fixedly connected with the upper shell 2011 of the sealing element shell, namely the puncture rod 300 to be fixedly connected with the sealing element 200. When the puncture rod 300 needs to be pulled out, the two side arms 3034b of the elastic clamping strip 3034 are pressed inwards again to release the clamping between the clamping edge 3034b-1 and the clamping groove 2011b, and then the puncture rod 300 is pulled out upwards.

It would be inconvenient if the resilient snap strip 3034 were to be depressed each time the penetration rod 300 is inserted into the seal assembly 200 and the penetration sleeve 100. In this embodiment, a guiding inclined surface (not shown) is provided at the bottom of the blocking edge 3034 b-1. Thus, when the puncture rod 300 is attached, the two side arms 3034b are pushed downward in alignment with the two notches 2011b, and the lower end portions of the two side arms 3034b are inserted downward into the notches 2011b while being moved closer to each other by the guide of the guide slopes and the pushing force.

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

Furthermore, the rod seat lower seat body 3032 is provided with two side arm through holes 3032b arranged at intervals, the side arms 3034b penetrate into the side arm through holes 3032b, and the side arm 3034b is limited by the side arm through holes 3032b, so that the two side arms 3034b are prevented from being freely close to each other or away from each other to deform after the puncture rod 300 is pulled out.

In addition, when a surgeon needs to remove a foreign body from a patient, the puncture instrument needs to be separated a second time, i.e., the seal assembly 200 is removed from the puncture cannula 100. In this regard, the puncture instrument of the present embodiment is further designed to have the following structure:

the puncture cannula 100 has a rotary lock with a return spring mounted in a base 102, and two insertion holes 1021a extending downward into the mounting space of the rotary lock are formed in the top of the base 102. The bottom of the lower casing 2012 of the packing casing 201 is integrally provided with two downwardly extending latch tongues 2012b which cooperate with the aforementioned rotary lock, and the bottom of the latch tongues 2012b is provided with a head 2012b-1 which extends outwardly in the radial direction of the rotary ring. Generally, the latch 2012b is inserted downward into the insertion hole 1021a and locked with the rotary lock, so as to fix the sealing assembly 200 and the puncture cannula 100; when the doctor needs to take out the foreign matter, the rotating lock catch is unlocked, the sealing assembly 200 is pulled upwards, the clamping tongue 2012b is pulled out upwards from the insertion hole 1021a, and the sealing assembly 200 is taken down.

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

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

In a natural state, under the elastic force of the return spring 104, the locking platform 1031 on the rotating ring 103 abuts against and contacts the rotation stopping stopper 1021b, and the locking platform 1031 applies a clockwise abutting force in the plan view direction of fig. 11 to the rotation stopping stopper 1021b, so that the circumferential angle of the rotating ring 103 in the natural state is positioned. The clamp head 2012b-1 at the bottom end of the latch 2012b abuts against the bottom of the clamping platform 1031, and the two are mutually clamped and fixed in the vertical direction, so that the latch 2012b cannot be pulled out upwards. When the seal assembly 200 needs to be removed, the rotating ring 103 is rotated counterclockwise in the top view direction of fig. 11, so that the clamping table 1031 on the rotating ring 103 moves counterclockwise for a certain stroke (at this time, the return spring 104 is compressed and shortened), and further the clamping table 1031 and the chuck 2012b-1 at the bottom end of the clamping tongue 2012b are staggered with each other, at this time, the clamping table 1031 no longer vertically limits the chuck 2012b-1 at the bottom end of the clamping tongue 2012b, and the seal assembly 200 can be easily removed upward. The rotating ring 103 is released, and the rotating ring 103 is reset under the elastic force of the return spring 104.

It can be understood that the circular arc-shaped spring slots 1032 and the spring positioning columns 1033 at the ends of the slots greatly facilitate the positioning and installation of the return springs 104, and improve the assembly efficiency of the puncture outfit.

In this embodiment, the outer peripheral wall of the rotating ring 103 is disposed in contact with the cavity wall of the circular inner cavity, so as to limit the rotating ring 103, and only allow the rotating ring 103 to rotate, but not allow the rotating ring 103 to move radially.

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

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

In order to facilitate the rotation of the rotating ring 103 by the user, the rotating handle 1034 is integrally provided on the outer peripheral wall of the rotating ring 103 and extends radially outward. Correspondingly, a notch 1021d is formed in the seat 1021 of the tube seat for the rotation handle 1034 to extend out, so that the rotation handle 1034 can be easily touched and actuated by the user.

After the puncture rod 300 is withdrawn upwardly from the puncture sleeve 100 and seal assembly 200, the gas phase of the patient's abdominal cavity should still be kept isolated from the external environment to prevent the escape of gas that fills the abdominal cavity. However, as can be seen from the specific construction of the seal assembly 200, the seal assembly 200 alone cannot effect a seal against the penetration of the puncture rod (or medical instrument) into the channel after the puncture rod 300 has been withdrawn. In this regard, in this embodiment, a one-way sealing ring 105 is further installed in the tube seat of the puncture cannula, and the one-way sealing ring 105 is of a conventional structure, and can be penetrated by the puncture rod 300 and can seal and close the puncture cannula after the puncture rod 300 is pulled out.

The one-way sealing ring 105 is fixedly installed between the upper seat body 1021 and the lower seat body 1022 of the tube seat, and when the upper seat body 1021 and the lower seat body 1022 of the tube seat are detached, the one-way sealing ring 105 can be easily taken out.

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

a circular vertical through hole, which may also be called a valve seat hole, is penetratingly disposed in the valve seat 401, the valve element 402 is rotatably inserted into the vertical through hole, the air inlet connection pipe 403 and the air outlet connection pipe 404 are both fixedly connected to the valve seat 401, the air inlet connection pipe 403 and the air outlet connection pipe 404 are respectively disposed at two radial sides of the vertical through hole, and the air inlet connection pipe 403 and the air outlet connection pipe 404 are both directly communicated with the vertical through hole. The air outlet adapter 404 is fixedly connected with the puncture cannula 200, and the air outlet adapter and the puncture cannula are communicated with each other. The valve core 402 includes a valve core rod 4021 rotatably inserted in the vertical through hole and a rotary handle 4022 fixedly connected to the upper end of the valve core rod and located outside the vertical through hole, and a through hole 4021a penetrating in the radial direction is formed in the valve core rod 4021.

In practice, the intake adapter 403 is connected to an upstream air supply system. If the user holds the rotation handle 4022 to rotate the valve core 402, so that the vent hole 4021a on the valve core rod 4021 is exactly aligned with the air inlet connecting pipe 403 and the air outlet connecting pipe 404 on the two sides, the vent hole 4021a communicates the air inlet connecting pipe 403 and the air outlet connecting pipe 404, and the gas (CO2) introduced from the air inlet connecting pipe 403 sequentially enters the abdominal cavity of the patient through the valve core vent hole 4021a, the air outlet connecting pipe 404 and the puncture cannula 100 to establish pneumoperitoneum. If the user rotates the valve core 402 reversely to make the vent hole 4021a on the valve core rod 4021 staggered with the inlet connecting pipe 403 and the outlet connecting pipe 404 on both sides, and the solid part of the valve core rod 4021 blocks the left end pipe orifice of the inlet connecting pipe 403 in fig. 10, the gas supplied from the gas supply device cannot enter the outlet connecting pipe 404, so that the inflation of the abdominal cavity is stopped.

The user's experience alone is relied on to determine whether the rotation angle of the valve core 402 is as desired, which is obviously unreliable and undesirable. To this end, the present embodiment provides a structure for limiting the rotation angle of the valve element between the valve element and the valve seat, specifically: two limiting protrusions 4011 which are arranged at intervals along the circumferential direction are integrally arranged on the hole wall of the vertical through hole of the valve seat 401, an arc protrusion 4021b which extends in an arc shape is integrally arranged on the rod wall of the valve core rod 4021, and the arc protrusion 4021b is arranged between the two limiting protrusions 4011. In the process of rotating the valve core 402, when the circular arc protrusion 4021b abuts against one of the limiting protrusions 4011, the vent hole 4021a on the valve core 402 just aligns with the air inlet connection pipe 403 and the air outlet connection pipe 404, and the air inlet connection pipe 403 and the air outlet connection pipe 404 are communicated with each other, at this time, the valve core 402 cannot continue to rotate along the initial direction due to the abutting limit of the circular arc protrusion 4021b and the limiting protrusion 4011. That is, the spool 402 can only be rotated in the reverse direction at this time, and the spool cannot be further rotated in the initial direction. When the circular arc protrusion 4021b abuts against and contacts with the other limiting protrusion 4011, the vent hole 4021a on the valve core 402 is just staggered with the air inlet connecting pipe 403 and the air outlet connecting pipe 404 on the two sides, the solid part of the valve core rod 4021 blocks the pipe orifice of the air inlet connecting pipe 403, and air provided by air supply equipment cannot enter the air outlet connecting pipe 404.

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

In order to make the glue adhere more firmly between the air outlet pipe 404 and the connecting pipe 1022a, the outer wall of the air outlet pipe 404 is provided with a ring of glue groove 4041 surrounding the air outlet pipe.

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

The foregoing is a more detailed description of the present application in connection with specific embodiments thereof, and it is not intended that the present application be limited to the specific embodiments thereof. It will be apparent to those skilled in the art from this disclosure that many more simple derivations or substitutions can be made without departing from the spirit of the disclosure.

Claims (10)

1. A laparoscopic puncture instrument comprising:

a vertically arranged puncture cannula (100),

a sealing assembly (200) arranged at the top of the puncture cannula,

a puncture rod (300) vertically inserted in the seal assembly and the puncture cannula, an

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

the seal assembly (200) comprises:

a seal housing (201), and

an upper retaining ring (202), a flexible sealing gasket (203) and a lower retaining ring (205) which are arranged in the sealing element shell from top to bottom in sequence;

the flexible sealing gasket (203) is of an integral structure and comprises a conical surface part (2032) with a downward pointed end, wherein a first through hole (2031) which is vertically communicated and has a hole diameter smaller than the rod diameter of the puncture rod (300) is formed in the pointed end of the conical surface part (2032).

2. The laparoscopic puncture instrument according to claim 1, wherein said flexible sealing gasket (203) comprises an annular flange (2031a) integrally formed at a lower end aperture of said first through hole (2031) and protruding downward.

3. The laparoscopic puncture outfit according to claim 1, wherein a hard anti-turnover protection plate (204) is interposed between the upper retaining ring (202) and the flexible sealing gasket (203), the anti-turnover protection plate (204) comprises a spherical portion (2042) protruding downwards, and a second through hole (2043) having a larger aperture than that of the first through hole (2031) is vertically arranged through the center of the spherical portion (2042).

4. The laparoscopic puncture outfit according to claim 3, wherein the upper retaining ring (202) is integrally provided with a plurality of downwardly extending insertion posts (2021) arranged at intervals along the circumferential direction, the top surface of the lower retaining ring (205) is provided with a plurality of downwardly recessed insertion slots arranged at intervals along the circumferential direction, the flexible gasket (203) is provided with a plurality of first positioning holes (2033a) vertically penetrating and arranged at intervals along the circumferential direction, the anti-overturn protection sheet (204) is provided with a plurality of second positioning holes (2041) vertically penetrating and arranged at intervals along the circumferential direction, and the insertion posts (2021) sequentially penetrate through the second positioning holes (2041) and the first positioning holes (2033a) from top to bottom and then are fixedly inserted into the insertion slots.

5. The laparoscope puncture outfit according to claim 4, wherein the flexible sealing gasket (203) comprises a thickened ring (2033) integrally surrounding the periphery of the conical surface portion (2032), the first positioning hole (2033a) is formed in the thickened ring (2033), a plurality of positioning lugs (2044) extending outwards are integrally arranged on the outer edge of the anti-overturn protection sheet (204), a positioning gap (2045) is formed between any two adjacent positioning lugs (2044), a plurality of positioning bosses (2033b) protruding upwards are integrally arranged on the top of the thickened ring (2033), a positioning groove (2033c) is formed between any two adjacent positioning bosses (2033b), the positioning bosses (2033b) are embedded in the positioning gap (2045), and the positioning lugs (2044) are embedded in the positioning groove (2033 c).

6. The laparoscopic puncture outfit according to claim 5, wherein the positioning protrusion (2033b) is formed with a positioning groove (2033d) which is recessed downward, the upper retaining ring (202) is integrally provided with a positioning protrusion (2022) which is protruded downward, the positioning protrusion (2022) is embedded in the positioning groove (2033d), and the depth of the positioning groove (2033c) is equal to the thickness of the positioning lug (2044).

7. The laparoscopic puncture outfit according to claim 1, wherein the sealing member housing (201) comprises an upper housing (2011) and a lower housing (2012) which are detachably connected, wherein vertically penetrating insertion holes are arranged in the upper housing (2011) and the lower housing (2012), the first through hole (2031) of the flexible gasket (203) is coaxially arranged with the insertion holes, and the outer edge of the flexible gasket (203) is hermetically clamped between the upper housing (2011) and the lower housing (2012).

8. The laparoscopic puncture instrument according to claim 7, wherein the outer rim of said flexible seal (203) comprises:

a ring of horizontally extending horizontal circular rims, an

A circle of vertical circular ring edge (2035) which is integrally connected with the periphery of the horizontal circular ring edge (2034) and vertically extends downwards;

go up casing (2011) including the vertical last clamping ring (2011a) that stretches out downwards of round, casing (2012) includes the vertical lower clamping ring (2012a) that upwards stretches out of round down, vertical ring limit (2035) elasticity paste to overlap in it is peripheral to lower clamping ring (2012a), horizontal ring limit is vertically pressed from both sides tightly go up clamping ring (2011a) with between lower clamping ring (2012 a).

9. The laparoscopic puncture instrument according to claim 5, wherein said flexible seal (203) comprises a corrugated ring (2036) disposed around the outer periphery of said thickened ring (2033).

10. A seal assembly of a laparoscopic puncture instrument comprising:

a seal housing (201), and

an upper retaining ring (202), a flexible sealing gasket (203) and a lower retaining ring (205) which are arranged in the sealing element shell from top to bottom in sequence;

the flexible sealing gasket (203) is of an integral structure and comprises a conical surface part (2032) with a downward pointed end, wherein a first through hole (2031) which is vertically communicated and has a hole diameter smaller than the rod diameter of the puncture rod (300) is formed in the pointed end of the conical surface part (2032).

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