Puncture outfit

Abstract

The utility model belongs to the field of medical instruments, and particularly relates to a puncture outfit. A puncture through hole is formed in a puncture base, a connecting sleeve is arranged on the puncture base on one side of the puncture through hole, a guide semicircular sleeve is arranged on the puncture base on the other side of the puncture through hole, limiting check blocks are symmetrically arranged on the wall face of the connecting sleeve, each limiting check block comprises an arc-shaped check block body protruding out of the wall face, and the guide semicircular sleeve is arranged on the guide semicircular sleeve. A guide slope is arranged on the side, close to the connecting sleeve, of the check block body, the radius of the guide semicircular sleeve is smaller than that of the puncture through hole, the guide semicircular sleeve forms a limiting blocking face in the axial direction of the puncture through hole, a connecting hole is formed in the wall face of the stainless steel pipe, the stainless steel pipe is inserted from the connecting sleeve, and the end face of the stainless steel pipe abuts against the limiting blocking face. The limiting baffle block is matched in the connecting hole; the connection mode of the stainless steel tube and the puncture base is improved, and the stainless steel tube and the puncture base are fixed through structural parts, so that connection is reliable and stable.

Description

Technical Field

[0001] The utility model belongs to the field of medical devices, and particularly relates to a trocar. Background Art

[0002] In minimally invasive human medical surgeries, once a disease is found in the human body and surgery or resection is required, during the surgery, the first instrument to be used is a trocar. A trocar is a surgical instrument that pierces the abdominal wall and provides a channel for other surgical instruments to enter the body cavity, belonging to a minimally invasive surgical instrument. A trocar usually includes a sleeve assembly serving as a channel for other surgical instruments to enter and a trocar rod penetrating through the sleeve assembly. First, in order to penetrate the skin, the skin epidermis is first incised with a scalpel, and then the trocar rod is used to penetrate the skin and enter the body cavity together with the sleeve assembly. Then, the trocar rod is withdrawn, and the sleeve assembly can be used as a channel to introduce various instruments and tools into the abdominal cavity and provide an inflation chamber to raise the abdominal wall above the organs.

[0003] In the prior art, the connection between the stainless steel tube and the trocar base of the trocar is fixed by glue. The strength of the product is poor, and there are safety implications. Further, in the prior art, the support pieces in the seal of the trocar sleeve assembly are all designed in a petal shape, and then multiple pieces are assembled together to form a complete support piece. There may be a problem of missing installation of the support piece during the assembly process, resulting in the failure of the product's sealing ring. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the utility model improves the trocar. First, the connection method between the stainless steel tube and the trocar base is improved, and it is fixed through a structural member, with reliable and stable connection. Secondly, the support piece of the first seal assembly of the trocar sleeve assembly is improved, adopting an integrated design, which is convenient for assembly and reduces the manufacturing cost.

[0005] The technical solution of the utility model is as follows:

[0006] A trocar, which includes a trocar needle assembly and a trocar sleeve assembly. The trocar needle assembly includes a trocar base, a stainless steel tube, and a trocar head. A trocar through hole is provided on the trocar base. A connecting sleeve is provided on the trocar base on one side of the trocar through hole, and a guiding semi-circular sleeve is provided on the trocar base on the other side of the trocar through hole. Symmetrically arranged limiting blocks are provided on the wall surface of the connecting sleeve. The limiting block includes an arc-shaped block body protruding from the wall surface. A guiding slope surface is provided on the side of the block body close to the connecting sleeve. The radius of the guiding semi-circular sleeve is smaller than the radius of the trocar through hole. The guiding semi-circular sleeve forms a limiting and blocking surface in the axial direction of the trocar through hole. A connecting hole is provided on the wall surface of the stainless steel tube. The stainless steel tube is inserted from the connecting sleeve and its end face abuts against the limiting and blocking surface. The limiting block is fitted in the connecting hole.

[0007] Furthermore, the puncture cannula assembly includes a puncture cannula base and a cannula connected to the puncture cannula base. The interior of the puncture cannula base is provided with a first sealing assembly and a second sealing assembly. The first sealing assembly includes a first sealing ring and further includes a support member connected to the first sealing ring for preventing the first sealing ring from turning outwards. The support member includes a support piece with a tapered cross-section. A through-hole is provided in the middle of the support piece. Four spaced slits are evenly distributed on the support piece body, and the spaced slits extend to the through-hole. Four connecting portions are provided at the edge of the support piece. The spaced slits correspond to the middle portions of the connecting portions. The connecting portions include vertical sides and horizontal sides. Two fixing holes are provided on the horizontal plate. The support piece and the connecting portions are integrally formed.

[0008] Furthermore, the first sealing ring includes a tapered sealing valve. A connecting edge is provided at the edge of the sealing valve, and a through-hole is provided on the connecting edge. It further includes an annular upper pressing plate and a lower pressing plate. A plurality of connecting columns are provided on the lower surface of the upper pressing plate, and a plurality of connecting holes are provided on the lower pressing plate. After the support piece and the first sealing ring are assembled, the connecting columns of the upper pressing plate pass through the fixing holes and the through-holes and are in interference fit with the connecting holes of the lower pressing plate.

[0009] Furthermore, an inner ring pressing plate is provided at the inner ring edge of the upper pressing plate, and the inner pressing plate presses on the vertical side of the support member.

[0010] Furthermore, an elastic connecting edge with an S-shaped cross-section is connected to the outer ring of the connecting edge. A second horizontal edge is provided at the edge of the elastic connecting edge, and a second vertical edge is provided at the edge of the second horizontal edge.

[0011] In summary, the present utility model has the following beneficial effects:

[0012] 1. The present utility model improves the structure of the puncture device. Specifically, the connection structure between the stainless steel tube of the puncture needle and the puncture base is improved. Axial limitation of the stainless steel tube is achieved through the limit stop block and the limit stop surface, thereby ensuring the reliability of its connection with the puncture base. Moreover, the connection structure is simple, facilitating processing, manufacturing, and assembly.

[0013] 2. The present utility model further improves the first sealing assembly of the puncture cannula assembly. Specifically, the support member is improved. The support member of the present utility model adopts an integrated design and can be installed once, overcoming the problem of cumbersome installation existing in the prior art with a multi-piece design. Further, the problem of possible missing installation is also avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional schematic diagram of the present utility model;

[0015] Figure 2 is a cross-sectional schematic diagram of the present utility model;

[0016] Figure 3 is Figure 2 the enlarged schematic diagram in

[0017] Figure 4 the three-dimensional schematic diagram of the puncture base, stainless steel tube and puncture head;

[0018] Figure 5 the three-dimensional schematic diagram of the first sealing assembly;

[0019] Figure 6 the three-dimensional schematic diagram of the first sealing assembly with the upper pressing plate removed;

[0020] Figure 7 the three-dimensional schematic diagram of the first sealing assembly with the support removed;

[0021] Figure 8 the sectional schematic diagram of the first sealing assembly;

[0022] Figure 9 the three-dimensional schematic diagram of the support;

[0023] In the figure, 1 is the puncture needle assembly, 10 is the puncture base, 11 is the stainless steel tube, 12 is the puncture head, 100 is the puncture through-hole, 101 is the connecting sleeve, 103 is the guiding semi-circular sleeve, 104 is the limiting stop block, 1040 is the block body, 1041 is the guiding slope surface, 1030 is the limiting blocking surface, 110 is the connecting hole.

[0024] 2 is the puncture cannula assembly, 20 is the puncture cannula base, 21 is the cannula, 3 is the first sealing assembly, 4 is the second sealing assembly, 30 is the first sealing ring, 31 is the support, 310 is the support piece, 311 is the spaced gap, 312 is the connecting part, 3120 is the vertical side, 3121 is the horizontal side, 3122 is the fixing hole, 301 is the sealing valve, 302 is the connecting edge, 303 is the through-hole, 304 is the upper pressing plate, 305 is the lower pressing plate, 3040 is the connecting column, 3041 is the inner ring pressing plate, 306 is the elastic connecting edge, 307 is the second horizontal side, 308 is the second vertical side. Detailed implementation manners

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it, but the specific embodiments cited are not intended to limit the present invention.

[0026] It should be noted that when an element is referred to as being "disposed on" or "fixed to" another element, it can be directly on the other element or there can be an intermediate element. When an element is referred to as being "fixed to" another element or "fixedly connected" to another element, the connection between them can be a detachable fixing method or a non-detachable fixing method. When an element is considered to be "connected" or "rotationally connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right", "up", "down" and similar expressions are only for the purpose of illustration and do not represent the only implementation.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the description of this invention herein are only for the purpose of describing specific embodiments and are not intended to limit this invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] In the present invention, the terms such as "first", "second", "third", etc. do not represent specific quantities and sequences, but are only used for name distinction.

[0029] See Figures 1 to 4 As shown, the trocar includes a trocar needle assembly 1 and a trocar cannula assembly 2. The trocar needle assembly 1 includes a trocar base 10, a stainless steel tube 11 and a trocar tip 12. A trocar through hole 100 is provided on the trocar base 10. A connecting sleeve 101 is provided on the trocar base 10 on one side of the trocar through hole 100. A guiding semi-circular sleeve 103 is provided on the trocar base 102 on the other side of the trocar through hole 100. Limiting blocks 104 are symmetrically provided on the wall surface of the connecting sleeve 101. The limiting block 104 includes an arc-shaped block body 1040 protruding from the wall surface. A guiding slope 1041 is provided on the side of the block body close to the connecting sleeve. The radius of the guiding semi-circular sleeve 103 is smaller than the radius of the trocar through hole 100. The guiding semi-circular sleeve 103 forms a limiting and blocking surface 1030 in the axial direction of the trocar through hole 100. A connecting hole 110 is provided on the wall surface of the stainless steel tube 11. The stainless steel tube 11 is inserted from the connecting sleeve and its end surface abuts against the limiting and blocking surface. The limiting block is fitted in the connecting hole.

[0030] The utility model improves the structure of the puncture device and improves the connection structure between the stainless steel tube and the puncture base. Firstly, the connection structure between the stainless steel tube and the puncture base is improved, and the connecting sleeve is tightly matched with the outer wall of the stainless steel tube to ensure the sealing between the connecting sleeve and the outer wall of the stainless steel tube. Secondly, the stainless steel tube is positioned axially by the limit stopper and the limit blocking surface. The axial positioning of the physical structure makes the structure stable and reliable and not prone to failure.

[0031] Further, see Figure 2 as well as Figures 5 to 9 As shown, the puncture sleeve assembly 2 includes a puncture sleeve seat 20 and a sleeve 21 connected to the puncture sleeve seat, the interior of the puncture sleeve seat 20 is provided with a first sealing assembly 3 and a second sealing assembly 4, the first sealing assembly 3 includes a first sealing ring 30, and also includes a support member 31 connected to the first sealing ring 30 for preventing the first sealing ring from everting outward, the support member 31 includes a support sheet 310 with a conical cross-section, a through hole is provided in the middle of the support sheet 310, and the support sheet body 310 is evenly distributed with four spaced slits 311, and the spaced slits 311 extend to the through hole, during the insertion of the puncture needle, no The stainless steel pipe will stretch the support sheet body along the interval gap. Four connecting parts 312 are provided at the edge of the support sheet 310. The interval gap corresponds to the middle part of the connecting part. The connecting part includes a vertical edge and a horizontal edge. Two fixing holes are provided on the horizontal plate. The support sheet and the connecting part are integrally formed. The utility model improves the first sealing component of the puncture sleeve assembly, specifically the support member. The support member adopts an integral structural design and can be installed once, which overcomes the problem of missing installation that may exist in multiple assemblies of the prior art. The utility model can be installed once, which improves the installation efficiency.

[0032] The first sealing ring 30 includes a conical sealing valve 301, the edge of the sealing valve 301 is provided with a connecting edge 302, the connecting edge 302 is provided with a through hole 303, and also includes an annular upper pressing plate 304 and a lower pressing plate 305, the lower surface of the upper pressing plate 304 is provided with a plurality of connecting columns 3040, and the lower pressing plate 305 is provided with a plurality of connecting holes. When the support sheet and the first sealing ring are assembled, the connecting column of the upper pressing plate passes through the fixing hole, the through hole and the connecting hole of the lower pressing plate to have an interference fit. The structure of the first sealing ring is further defined here, and the connection and fixation of the first sealing ring and the support sheet are realized by the connection between the upper pressing plate and the lower pressing plate. The first sealing ring and the support sheet form a module in advance, which is convenient for the subsequent assembly of the entire puncture device.

[0033] Furthermore, an inner ring pressing plate 3041 is provided at the inner ring edge of the upper pressing plate 304. The inner pressing plate presses on the vertical side of the support member. The arranged inner ring pressing plate covering the vertical side of the support member can protect the vertical side of the support member, and reduce the possible impact and damage of the puncture needle on the support piece during the insertion of the puncture needle.

[0034] Furthermore, an elastic connecting edge 306 with an S-shaped cross-section is connected to the outer ring of the connecting edge 302. A second horizontal edge 307 is provided at the edge of the elastic connecting edge 306, and a second vertical edge 308 is provided at the edge of the second horizontal edge. During the assembly process, the arranged second horizontal edge and second vertical edge will be pressed by the puncture cannula base in the housing, and a seal is formed again between the edge of the first sealing ring and the puncture cannula base.

[0035] In summary, the present utility model has the following beneficial effects:

[0036] 1. The structure of the puncture device of the present utility model is improved. Specifically, the connection structure between the stainless steel tube of the puncture needle and the puncture base is improved. The axial limit of the stainless steel tube is achieved through the limit stop block and the limit stop surface, thereby ensuring the reliability of its connection with the puncture base, and the connection structure is simple, facilitating processing, manufacturing and assembly.

[0037] 2. The present utility model further improves the first sealing assembly of the puncture cannula assembly. Specifically, the support member is improved. The support member of the present utility model adopts an integrated design and can be installed once, overcoming the problem of cumbersome installation existing in the prior art with a multi-piece design. Further, the problem of possible missing installation is also avoided.

[0038] Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

Claims

1. A puncture device, comprising a puncture needle assembly and a puncture cannula assembly, characterized in that: The puncture needle assembly includes a puncture base, a stainless steel tube and a puncture head. The puncture base is provided with a puncture through hole, a connecting sleeve is provided on the puncture base on one side of the puncture through hole, and a guide semicircular sleeve is provided on the puncture base on the other side of the puncture through hole. The wall surface of the connecting sleeve is symmetrically provided with limit blocks, and the limit blocks include an arc-shaped block body protruding from the wall surface, and a guide slope is provided on the side of the block body close to the connecting sleeve. The radius of the guide semicircular sleeve is smaller than the radius of the puncture through hole, and the guide semicircular sleeve forms a limit blocking surface in the axial direction of the puncture through hole. The wall surface of the stainless steel tube is provided with a connecting hole, the stainless steel tube is inserted from the connecting sleeve and the end face abuts against the limit blocking surface, and the limit block fits in the connecting hole.

2. The trocar according to claim 1, characterized in that: The puncture sleeve assembly includes a puncture sleeve seat and a sleeve connected to the puncture sleeve seat. The interior of the puncture sleeve seat is provided with a first sealing assembly and a second sealing assembly. The first sealing assembly includes a first sealing ring and also includes a support member connected to the first sealing ring to prevent the first sealing ring from turning outward. The support member includes a support sheet with a conical cross-section, a through hole is provided in the middle of the support sheet, four spaced slits are evenly distributed on the support sheet body, and the spaced slits extend to the through hole. Four connecting parts are provided at the edge of the support sheet, and the spaced slits correspond to the middle of the connecting part. The connecting part includes a vertical edge and a horizontal edge. Two fixing holes are provided on the horizontal plate. The support sheet and the connecting part are integrally formed.

3. The trocar according to claim 2, characterized in that: The first sealing ring includes a conical sealing valve, the edge of the sealing valve is provided with a connecting edge, the connecting edge is provided with a through hole, and also includes an annular upper pressure plate and a lower pressure plate, the lower surface of the upper pressure plate is provided with a plurality of connecting columns, and the lower pressure plate is provided with a plurality of connecting holes. When the support plate and the first sealing ring are assembled, the connecting column of the upper pressure plate passes through the fixing hole, the through hole and the connecting hole of the lower pressure plate for interference fit.

4. The trocar according to claim 3, characterized in that: The inner ring edge of the upper pressing plate is provided with an inner ring pressing plate, and the inner ring pressing plate is pressed on the vertical edge of the supporting member.

5. The trocar according to claim 3, characterized in that: The outer circle of the connecting edge is connected with an elastic connecting edge with an S-shaped cross section, the edge of the elastic connecting edge is provided with a second horizontal edge, and the edge of the second horizontal edge is provided with a second vertical edge.

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