Single-use puncture device

Abstract

The present application relates to the technical field of disposable puncture equipment, in particular to a disposable puncture device, the lower end of the inner ring is provided with a right-angle reinforcing ring which is pressed on the upper end port of the puncture port, a thin-walled tube is arranged between the inner tube and the bellows, a cross bar is slidably inserted through the lower ring, one end of the cross bar is driven to slide inward under the rotation and extrusion of the rotating arc block, and the other end of the cross bar extrudes and fixes the side wall of the thin-walled tube on the outer arc wall of the inner ring, beneficial effects are that: by arranging the fixed tube assembly on the sleeve, the port of the puncture port is adhered to the right-angle reinforcing ring to form extrusion sealing during the sleeve insertion process, so as to avoid the blood flow out of the puncture port, after puncture, the rotation arc block is used to realize the fixation with the skin, and the rotation adhesion achieves the purpose of fixing the height of the bellows at the same time, so as to avoid causing extrusion rebound, thereby forming the protection of the puncture port, reducing the risk of infection, improving the stability of subsequent operation and the efficiency of wound healing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of disposable puncture equipment, in particular to a disposable puncture device. BACKGROUND

[0002] In the prior art, during puncture treatment, a puncture device is used to puncture the human body, and a miniature image lens is used to clearly observe the internal structure of the human body, thereby facilitating surgical treatment.

[0003] The existing patent: CN105534576B disposable puncture device is a minimally invasive endoscope supporting surgical instrument suitable for establishing a surgical working channel during laparoscopic examination and surgery of the abdominal cavity, urinary system and gynecological system. The disposable puncture device comprises a puncture sleeve, a gas injection valve, a gas injection switch, a gas blocking sealing sheet, a flat sealing sheet, a valve body upper cover, a puncture cone and a puncture cone handle sleeve; the puncture sleeve is provided with a valve body at the rear, and the valve body and the puncture sleeve are arranged in one body; the gas blocking sealing sheet is installed in the inner cavity of the valve body; the flat sealing sheet is installed at the rear of the gas blocking sealing sheet in the inner cavity of the valve body; the valve body upper cover is installed in the valve body upper cover installation groove of the valve body, the flat sealing sheet compression step cooperates with the valve body upper cover compression groove of the flat sealing sheet, and the flat sealing sheet and the gas blocking sealing sheet are compressed; the puncture cone handle sleeve is provided with a handle connector mounting hole, and the puncture cone handle sleeve is fixedly sleeved on the puncture cone handle connector through the handle connector mounting hole.

[0004] The existing disposable puncture device is composed of a sleeve and a puncture cone which are mutually sleeved, after puncture, the puncture cone is taken out, the sleeve is placed at the puncture position to form an operation platform, which is convenient for subsequent surgical operation, but during puncture, the skin needs to be pierced, therefore, blood will seep out at the puncture position after puncture, which will affect the subsequent operation and the stability of the sleeve at the position. SUMMARY

[0005] The present application aims to provide a disposable puncture device to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] The utility model provides a disposable puncture device, which comprises a needle rod assembly and a sleeve assembly which are sleeved with each other, the needle rod assembly comprises a mounting head connected with a visible lens and a needle rod for puncture, the end of the needle rod is provided with a cutter head, the sleeve assembly comprises a threaded sleeve sleeved outside the needle rod and a sealing cover connected with the mounting head, a lower shell is arranged between the threaded sleeve and the sealing cover, a fixed tube assembly fixed outside the puncture port is arranged between the upper end of the threaded sleeve and the lower shell, the fixed tube assembly comprises an upper sleeve ring clamped with the arc outer wall of the lower shell, an upper annular table rotationally attached to the lower end surface of the lower shell, an inner tube is arranged at the lower end of the upper annular table, a corrugated tube is arranged at the lower end outside of the upper annular table, a lower ring attached to the skin is arranged at the upper end and the lower end of the corrugated tube, the arc outer wall of the lower ring is provided with a plurality of groups of rotationally mounted rotation arc blocks which are distributed in a circumferential array, the lower end of the rotation arc block is fixedly bonded to the skin outside the puncture port, an inner ring is arranged at the lower end of the inner tube, a right-angle reinforcing ring is arranged at the lower end of the inner ring and is pressed on the upper end port of the puncture port, a thin-walled tube is arranged between the inner tube and the corrugated tube, a horizontal rod is slidably inserted through the lower ring, one end of the horizontal rod is driven to slide inward under the rotation extrusion of the rotation arc block, and the other end of the horizontal rod is used for pressing and fixing the side wall of the thin-walled tube on the arc outer wall of the inner ring.

[0008] Preferably, a jack is arranged on the mounting head to facilitate the installation of the puncture lens, a fixing clamp for clamping the lens is arranged on the mounting head, a pair of clamping blocks are arranged at the lower end of the mounting head, a clamping groove is arranged at the upper end of the sealing cover and is fixedly clamped in cooperation with the clamping blocks, an adjusting groove is arranged on the lower shell, and a lock catch is arranged on the adjusting groove to control the connection between the sealing cover and the lower shell.

[0009] Preferably, a liquid seal sealing device is arranged in the lower shell, a water injection port is integrally formed on the lower shell and is communicated with the water inlet of the sealing device, a through hole is arranged between the sealing cover and the lower shell and is communicated with the threaded sleeve, and the upper end of the through hole is opposite to the jack.

[0010] Preferably, a stepped tube table is arranged at the upper end of the threaded sleeve, the inner diameter of the stepped tube table is smaller than the outer diameter of the threaded sleeve, the inner diameter of the right-angle reinforcing ring is smaller than the outer diameter of the threaded sleeve, and the right-angle reinforcing ring is located directly above the stepped tube table.

[0011] Preferably, a plurality of side grooves are arranged on the arc outer wall of the lower shell in a circumferential array, the upper sleeve ring is sleeved outside the lower end of the lower shell, a cavity in the form of an annular ring is arranged in the inner cavity of the upper sleeve ring, and a semi-spherical sac which can be deformed and expanded is sealingly arranged at one end of the cavity close to the arc inner wall of the upper sleeve ring.

[0012] Preferably, an air inlet pipe communicated with the cavity is arranged on the arc outer wall of the upper sleeve ring, the port of the air inlet pipe is sealed by a rubber sealing plug, the rubber sealing plug can be inserted into a syringe to introduce air into the cavity, so that the semi-spherical sac is expanded and clamped in the side groove.

[0013] Preferably, the upper annular platform is provided with multiple sets of rotating grooves, in which rollers are rotatably installed. The rollers are covered with pressure rings, and the upper arcuate outer wall of the rollers penetrates the pressure rings and fits against the lower end face of the lower shell. The pressure rings are fixedly installed by a fixing rod that penetrates the upper annular platform.

[0014] Preferably, the upper end of the outer arc of the lower ring is provided with a tensioning arc strip corresponding to the rotating arc block. The tensioning arc strip connects the lower ring and the rotating arc block. The rotating arc block can rotate along the tensioning arc strip to a position that fits against the outer arc of the lower ring. The lower end of the rotating arc block is provided with an adhesive layer that adheres to the skin.

[0015] Preferably, the lower end of the thin-walled tube extends to the same height as the inner ring, and the upper end of the thin-walled tube is provided with an installation ring that is sleeved with the fixing rod. The installation ring is fixed by a nut at the end of the fixing rod through threaded rotation.

[0016] Preferably, an annular groove is provided on the outer arc of the inner ring, the groove being flush with the same height as the crossbar, and the end of the crossbar pressing and fixing the outer wall of the thin-walled tube in the groove.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This invention provides a fixing tube assembly on the cannula. During cannula insertion, a right-angle reinforcing ring fits against the puncture site, forming a compression seal to prevent blood leakage. After puncture, a rotating arc block is used to fix the tube to the skin, simultaneously fixing the height of the corrugated tube and preventing compression rebound. This protects the puncture site, reduces the risk of infection, and improves the stability of subsequent procedures and wound healing efficiency. Attached Figure Description

[0019] Figure 1 This is an assembly diagram of the needle bar assembly and sleeve assembly of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the connection between the needle bar assembly and the sleeve assembly of the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of the sleeve assembly of the present invention;

[0022] Figure 4 This is a three-dimensional structural diagram of the needle bar assembly of the present invention;

[0023] Figure 5 This is a schematic diagram of the mounting structure of the fixed tube assembly of the present invention;

[0024] Figure 6 for Figure 5 Enlarged view of the structure at point A in the middle;

[0025] Figure 7 For Figure 6 Structure enlarged view at B in the middle;

[0026] Figure 8 Fixed tube assembly half-section structure schematic diagram of the application;

[0027] Figure 9 Fixed tube assembly structure schematic diagram of the application;

[0028] Figure 10 Fixed tube assembly bottom structure schematic diagram of the application.

[0029] In the figure: 1, needle rod assembly; 2, sleeve assembly; 3, mounting head; 4, jack; 5, fixed clamp; 6, needle rod; 7, cutter head; 8, sealing cover; 9, sealer; 10, adjusting groove; 11, lock catch; 12, water inlet; 13, lower shell; 14, threaded tube; 15, clamping block; 16, clamping groove; 17, through hole; 19, fixed tube assembly; 20, stepped tube table; 21, upper sleeve ring; 22, upper circular ring table; 23, corrugated tube; 24, lower ring; 25, inner tube; 26, rotating arc block; 27, elastic arc strip; 28, adhesive layer; 29, right-angle reinforcing ring; 30, inner ring; 31, cross rod; 32, thin-walled tube; 33, side groove; 34, cavity; 35, air inlet tube; 36, hemispherical bag; 37, rubber sealing plug; 38, roller; 39, compression ring; 40, fixed rod; 41, mounting ring; 42, rotating groove; 43, ring groove. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0031] Please refer to Figures 1 to 10 The application provides a technical solution:

[0032] Embodiment 1: A disposable puncture device, comprising a needle rod assembly 1 and a sleeve assembly 2 which are connected with each other, the needle rod assembly 1 comprising a mounting head 3 connected with a visual lens and a needle rod 6 for puncture, the mounting head 3 being provided with a jack 4 facilitating installation of the puncture lens, and the mounting head 3 being provided with a fixed clamp 5 for clamping the lens.

[0033] By arranging the jack 4 and the fixed clamp 5, the lens is fixedly installed, so that the puncture process is visually monitored throughout, and the puncture precision is facilitated to be improved.

[0034] The end of the needle rod 6 is provided with a cutter head 7, the sleeve assembly 2 includes a threaded tube 14 sleeved outside the needle rod 6 and a sealing cover 8 connected with the mounting head 3, the lower end of the mounting head 3 is provided with a pair of clamping blocks 15, and the upper end of the sealing cover 8 is provided with a clamping groove 16 fixedly clamped in cooperation with the clamping blocks 15.

[0035] Through cooperation of the clamping blocks 15 and the clamping groove 16, the mounting head 3 is clamped and fixedly mounted on the sealing cover 8, wherein the needle rod 6 and the cutter head 7 are provided with optical assemblies matched with the lens to transmit the image of the puncture end (which is mature prior art in the field and will not be described in detail).

[0036] The lower shell 13 is provided with an adjusting groove 10, and the adjusting groove 10 is provided with a lock catch 11 for controlling connection of the sealing cover 8 and the lower shell 13; the lower shell 13 is provided with a liquid seal sealing device 9, the lower shell 13 is provided with a water injection port 12 integrally formed and communicated with a water inlet of the sealing device 9, the sealing cover 8 and the lower shell 13 are provided with a through hole 17 communicated with the threaded tube 14, and the upper end of the through hole 17 is opposite to the insertion hole 4.

[0037] Through cooperation of the lock catch 11 and the adjusting groove 10 (which is mature prior art in the field and will not be described in detail), detachable mounting of the sealing cover 8 is realized, and the sealing connection between the threaded tube 14 and the lower shell 13 is realized through the sealing device 9.

[0038] The lower shell 13 is arranged between the threaded tube 14 and the sealing cover 8, and the upper end of the threaded tube 14 and the lower shell 13 are provided with a fixed tube assembly 19 fixed outside the puncture port, the fixed tube assembly 19 includes an upper sleeve ring 21 clamped with the arc outer wall of the lower shell 13, an upper circular ring table 22 rotationally attached to the lower end surface of the lower shell 13, an inner tube 25 arranged at the lower end inner side of the upper circular ring table 22, and a corrugated tube 23 arranged at the lower end outer side of the upper circular ring table 22.

[0039] The corrugated tube 23 is adapted to extrusion deformation when the puncture is inserted, so that the right-angle reinforcing ring 29 is tightly pressed on the puncture port.

[0040] The lower end of the corrugated tube 23 is provided with a lower ring 24 attached to the skin, the arc outer wall of the lower ring 24 is provided with a plurality of groups of rotationally mounted rotation arc blocks 26 distributed in a circumferential array, the lower end of the rotation arc block 26 is fixedly bonded to the skin outside the puncture port, the arc outer wall of the upper end of the lower ring 24 is provided with a plurality of groups of loose arc strips 27 corresponding to the rotation arc blocks 26, the loose arc strips 27 connect the lower ring 24 and the rotation arc blocks 26, the rotation arc blocks 26 can be rotated along the loose arc strips 27 to a position attached to the arc outer wall of the lower ring 24, and the lower end of the rotation arc block 26 is provided with a bonding layer 28 bonded to the skin.

[0041] The loose arc strips 27 are arranged to rotationally mount the rotation arc blocks 26 outside the lower ring 24, and the bonding layer 28 is arranged to fixedly bond to the skin.

[0042] The lower end of the inner tube 25 is provided with an inner ring 30, the lower end of the inner ring 30 is provided with a right-angled reinforcing ring 29 which is pressed on the upper end port of the puncture port, the upper end of the threaded tube 14 is provided with a stepped tube platform 20, the inner diameter of the stepped tube platform 20 is smaller than the outer diameter of the threaded tube 14, the inner diameter of the right-angled reinforcing ring 29 is smaller than the outer diameter of the threaded tube 14, and the right-angled reinforcing ring 29 is located directly above the stepped tube platform 20.

[0043] The stepped tube platform 20 is provided to form a difference in outer diameter, so that when punctured to this position, a circular annular gap is formed between the outer wall of the threaded tube 14 and the inner wall of the puncture port, facilitating the insertion and pressing of the vertical section of the right-angled reinforcing ring 29.

[0044] A thin-walled tube 32 is provided between the inner tube 25 and the corrugated tube 23, a cross rod 31 is slidably inserted through the lower ring 24, one end of the cross rod 31 is driven to slide inward under the rotation and extrusion of the rotating arc block 26, and the other end of the cross rod 31 extrudes and fixes the side wall of the thin-walled tube 32 on the circular arc outer wall of the inner ring 30.

[0045] During the rotation of the rotating arc block 26, the purpose of extruding one end of the cross rod 31 is achieved, so that the cross rod 31 moves inward, realizing the fixed extrusion of the side wall of the thin-walled tube 32, thereby limiting the height of the fixed tube assembly 19 after extrusion.

[0046] Working principle: first, install the seal 9 in the lower shell 13, install the seal cover 8 on the upper end, insert the threaded tube 14 with the fixed tube assembly 19 at the end into the lower end of the lower shell 13, and then insert the needle rod assembly 1 and the sleeve assembly 2 into each other, and use the cooperation of the clamping block 15 and the clamping groove 16 to form a fixed connection between them.

[0047] In the actual puncture process, the extrusion of the cutter head 7 realizes the piercing of the skin, and the continuous advancement achieves the purpose of puncturing the human body. During the descent, the lower ring 24 first contacts the skin, and under the action of extrusion force, the corrugated tube 23 contracts. As the continuous descent continues, when punctured to the position of the stepped tube platform 20, a circular annular gap is formed between the outer wall of the threaded tube 14 and the inner wall of the puncture port, facilitating the insertion and pressing of the vertical section of the right-angled reinforcing ring 29. At this time, under the limiting of the inner tube 25, it cannot continue to be inserted, so as to limit the depth of puncture and avoid excessive puncture.

[0048] After puncture, the sealing connection between the upper end of the threaded tube 14 and the sealing cover 8 is realized by injecting water into the sealer 9, at this time the right-angle reinforcing ring 29 is pressed on the puncture port to avoid blood seepage and to strengthen the strength of the puncture port to avoid continuous friction damage to the port position caused by the expansion and contraction of the puncture, then the fixed tube assembly 19 is fixedly connected with the skin by pulling the elastic arc strip 27 to make the rotating arc block 26 rotate the outside of the lower ring 24 and use the adhesive layer 28 to adhere and fix the skin, in the process of rotating and adhering, the rotating arc block 26 extrudes one end of the horizontal rod 31, so that the other end of the horizontal rod 31 is fixedly pressed on the side wall of the thin-walled tube 32, so that the side wall of the thin-walled tube 32 at this position is fixed on the inner ring 30, thereby using the thin-walled tube 32 to pull the height of the upper sleeve ring 21 and the upper circular ring table 22 to avoid the rebound caused by the reset of the bellows 23 after the free end is formed after losing the puncture pressure, which affects the puncture depth.

[0049] Example 2: On the basis of example 1, since the treatment operation after the puncture operation includes complex processes such as extraction and cleaning of the tissue, the installation head 3 is involved in the disassembly, angle rotation adjustment of the threaded tube 14 and disassembly of the sealing cover 8, and the fixed installation of the fixed tube assembly 19 will affect the subsequent operation.

[0050] The outer arc wall of the lower shell 13 is provided with a circumferential array of side grooves 33, the upper sleeve ring 21 is sleeved on the outer side of the lower end of the lower shell 13, the inner cavity of the upper sleeve ring 21 is provided with a circular cavity 34, one end of the circular cavity 34 close to the inner arc wall of the upper sleeve ring 21 is sealingly installed with a deformable and inflatable hemispherical sac 36, the outer arc wall of the upper sleeve ring 21 is provided with an air inlet pipe 35 communicating with the circular cavity 34, the port of the air inlet pipe 35 is sealed by a rubber sealing plug 37, the rubber sealing plug 37 can be inserted into a syringe to inject air into the circular cavity 34, so that the hemispherical sac 36 is inflated and clamped on the side groove 33.

[0051] By setting the cooperation of the circular cavity 34 and the rubber sealing plug 37, the puncture advancement of the syringe is used to increase the internal pressure of the circular cavity 34, so that the hemispherical sac 36 is deformed and inflated under pressure to form a transverse dislocation clamping with the side groove 33, so that the upper sleeve ring 21 and the lower shell 13 are temporarily fixedly connected to avoid position deviation during puncture.

[0052] After puncture, the hemispherical sac 36 is reset by pressure relief to release the dislocation clamping, so that the upper sleeve ring 21 and the lower shell 13 are separated, which is convenient for the free operation of the lower shell 13.

[0053] The upper circular ring table 22 is provided with a plurality of groups of rotating grooves 42, rollers 38 are rotatably installed in the rotating grooves 42, the rollers 38 are covered with pressure rings 39, the upper end arc outer wall of the rollers 38 penetrates the pressure rings 39 and abuts against the lower end face of the lower shell 13, and the pressure rings 39 are fixedly installed by penetrating the fixed rods 40 of the upper circular ring table 22.

[0054] By setting the cooperation between the rotating groove 42 and the pressing ring 39, the rotating installation of the roller 38 is realized, so as to form the rolling contact between the lower shell 13 and the upper circular ring table 22, reduce the friction, facilitate the rotation adjustment of the threaded pipe 14 driven by the lower shell 13, and will not be to the position of the right angle reinforcing ring 29, ensure the protection of the puncture port.

[0055] In example 3, on the basis of example 2, the lower end of the thin-walled pipe 32 extends to the position with the same height as the inner ring 30, the upper end of the thin-walled pipe 32 is provided with the mounting ring 41 sleeved with the fixed rod 40, and the mounting ring 41 is rotatably installed in the nut fixed at the end of the fixed rod 40 through the thread.

[0056] By setting the cooperation between the mounting ring 41 and the fixed rod 40, the fixed installation of the upper end of the thin-walled pipe 32 is realized.

[0057] The circular arc outer wall of the inner ring 30 is provided with the annular ring groove 43, the ring groove 43 is flush with the horizontal rod 31, and the end of the horizontal rod 31 is pressed and fixed to the outer wall of the thin-walled pipe 32 in the ring groove 43.

[0058] By setting the pressing groove with the arc surface formed by the ring groove 43, the extrusion area of the horizontal rod 31 to the side wall of the thin-walled pipe 32 is increased.

[0059] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A disposable puncture device, comprising a needle bar assembly (1) and a cannula assembly (2) interlocked together, the needle bar assembly (1) comprising a mounting head (3) connected to a viewing lens and a needle bar (6) for puncture, the end of the needle bar (6) being provided with a cutting head (7), the cannula assembly (2) comprising a threaded tube (14) sleeved on the outside of the needle bar (6) and a sealing cap (8) connected to the mounting head (3), characterized in that: A lower shell (13) is provided between the threaded tube (14) and the sealing cap (8). A fixing tube assembly (19) fixed to the outside of the puncture site is provided between the upper end of the threaded tube (14) and the lower shell (13). The fixing tube assembly (19) includes an upper collar (21) that engages with the outer arc of the lower shell (13) and an upper annular platform (22) that rotates and fits against the lower end face of the lower shell (13). An inner tube (25) is provided on the inner side of the lower end of the upper annular platform (22). A corrugated tube (23) is provided on the outer side of the lower end of the upper annular platform (22). A lower ring (24) that fits against the skin is provided at the lower end of the corrugated tube (23). Multiple sets of circumferentially distributed rings are provided on the outer arc of the lower ring (24). A rotating arc block (26) is installed, and the lower end of the rotating arc block (26) is fixedly bonded to the skin outside the puncture site. The lower end of the inner tube (25) is provided with an inner ring (30). The lower end of the inner ring (30) is provided with a right-angle reinforcing ring (29) pressed against the upper end of the puncture site. A thin-walled tube (32) is provided between the inner tube (25) and the corrugated tube (23). A crossbar (31) is slidably inserted through the lower ring (24). One end of the crossbar (31) is driven to slide inward under the rotation and compression of the rotating arc block (26). The other end of the crossbar (31) presses and fixes the side wall of the thin-walled tube (32) onto the arc outer wall of the inner ring (30). The upper end of the outer arc of the lower ring (24) is provided with a tensioning arc strip (27) corresponding to the rotating arc block (26). The tensioning arc strip (27) connects the lower ring (24) and the rotating arc block (26). The rotating arc block (26) can rotate along the tensioning arc strip (27) to a position that fits against the outer arc of the lower ring (24). The lower end of the rotating arc block (26) is provided with an adhesive layer (28) that adheres to the skin.

2. The disposable puncture device according to claim 1, characterized in that: The mounting head (3) is provided with an insertion hole (4) for easy installation of the piercing lens. The mounting head (3) is provided with a fixing clip (5) for holding the lens. The lower end of the mounting head (3) is provided with a pair of locking blocks (15). The upper end of the sealing cover (8) is provided with a locking groove (16) that cooperates with the locking blocks (15) for fixed engagement. The lower shell (13) is provided with an adjustment groove (10). The adjustment groove (10) is provided with a locking buckle (11) for controlling the connection between the sealing cover (8) and the lower shell (13).

3. The disposable puncture device according to claim 2, characterized in that: The lower shell (13) is provided with a liquid seal (9), and the lower shell (13) is provided with an integrally formed water inlet (12) that is connected to the water inlet of the seal (9). The middle of the sealing cover (8) and the lower shell (13) is provided with a through hole (17) that is connected to the threaded pipe (14), and the upper end of the through hole (17) is directly opposite the insertion hole (4).

4. The disposable puncture device according to claim 1, characterized in that: The upper end of the threaded pipe (14) is provided with a stepped pipe platform (20). The inner diameter of the stepped pipe platform (20) is smaller than the outer diameter of the threaded pipe (14), the inner diameter of the right-angle reinforcing ring (29) is smaller than the outer diameter of the threaded pipe (14), and the right-angle reinforcing ring (29) is located directly above the stepped pipe platform (20).

5. The disposable puncture device according to claim 4, characterized in that: The lower shell (13) has a circular array of side grooves (33) on its outer arc wall. The upper collar (21) is located on the outer side of the lower end of the lower shell (13). The inner cavity of the upper collar (21) has a circular cavity (34). The end of the cavity (34) near the inner arc wall of the upper collar (21) is sealed with a deformable and expandable hemispherical bladder (36).

6. The disposable puncture device according to claim 5, characterized in that: An air inlet pipe (35) communicating with the cavity (34) is provided on the outer arc wall of the upper collar (21). The port of the air inlet pipe (35) is sealed by a rubber sealing plug (37). The rubber sealing plug (37) can be inserted into a syringe to introduce air into the cavity (34), so that the hemispherical bladder (36) expands and is locked onto the side groove (33).

7. The disposable puncture device according to claim 1, characterized in that: The upper annular platform (22) is provided with multiple sets of rotating grooves (42), and a roller (38) is rotatably installed in the rotating groove (42). A pressure ring (39) is covered on the roller (38). The upper arc outer wall of the roller (38) passes through the pressure ring (39) and fits against the lower end face of the lower shell (13). The pressure ring (39) is fixedly installed by a fixing rod (40) that passes through the upper annular platform (22).

8. The disposable puncture device according to claim 7, characterized in that: The lower end of the thin-walled tube (32) extends to the same height as the inner ring (30), and the upper end of the thin-walled tube (32) is provided with an installation ring (41) that is sleeved with the fixing rod (40). The installation ring (41) is fixed by a nut at the end of the fixing rod (40) by threaded rotation.

9. The disposable puncture device according to claim 8, characterized in that: The inner ring (30) has an annular groove (43) on its arc-shaped outer wall. The annular groove (43) is flush with the crossbar (31) at the same height. The end of the crossbar (31) presses and fixes the outer wall of the thin-walled tube (32) in the annular groove (43).

Images