CN111938781A

CN111938781A - Hollow tube assembly containing rotary bolt for puncture outfit

Info

Publication number: CN111938781A
Application number: CN202010826903.0A
Authority: CN
Inventors: 曾国庆
Original assignee: Chongqing Chengyi Technology Co ltd
Current assignee: Chongqing Chengyi Technology Co ltd
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2020-11-17
Anticipated expiration: 2040-08-17
Also published as: CN111938781B

Abstract

The invention discloses a hollow tube component containing a rotary bolt for a puncture outfit, which comprises an outer pipeline, an inner pipeline and a rotary bolt, wherein the outer pipeline is connected with the inner pipeline; the outer tube including an outer tube proximal end and an outer tube distal end and an outer tube wall extending therebetween, the outer tube wall defining a first hollow channel; the outer pipeline also comprises an axial tunnel arranged along the axial direction of the outer pipeline, the tunnel comprises a first tunnel side wall and a second tunnel side wall which are connected with the outer pipeline into a whole, and also comprises a tunnel top wall connected with the first tunnel side wall and the second tunnel side wall, and the first tunnel side wall, the second tunnel side wall and the tunnel top wall define a tunnel channel communicated with the first hollow channel; the tunnel extends to the adjacent area of the far end of the outer pipe along the axial direction to form a closed tunnel end; the first tunnel side wall includes a circumferential chute communicating with the tunnel passage, the rotary bolt includes a latch having a shape and a size matching the circumferential chute, the rotary bolt is installed at an outer side of the first tunnel side wall, wherein the latch is inserted into the circumferential chute.

Description

Hollow tube assembly containing rotary bolt for puncture outfit

Technical Field

The invention relates to a minimally invasive surgical instrument, in particular to a hollow tube assembly containing a rotary bolt for a puncture outfit.

Background

A puncture instrument is a surgical instrument used in minimally invasive surgery (especially hard-tube endoscopic surgery) for establishing an artificial passage into a body cavity. Typically consisting of a spike assembly and a spike. The general clinical use mode is as follows: a small opening is cut on the skin of a patient, the puncture needle penetrates through the puncture tube assembly, and then the puncture needle penetrates through the abdominal wall through the skin opening to enter a body cavity. Once inside the body cavity, the needle is removed, leaving the puncture tube assembly as a passage for instruments into and out of the body cavity.

In the hard tube laparoscopic surgery, a pneumoperitoneum machine is usually adopted to continuously perfuse gas (such as carbon dioxide gas) into the abdominal cavity of a patient and maintain a stable gas pressure (about 13-15 mmHg) so as to obtain a sufficient operation space. The puncture tube assembly typically consists of a hollow tube, a housing, a sealing membrane (also known as an instrument seal) and a zero seal (also known as a self-seal). The puncture tube assembly penetrates from the outside of the body cavity to the inside of the body cavity and is used as a passage for instruments to enter and exit the body cavity. The housing connects the hollow tube, zero seal and sealing membrane into a sealed system. The zero seal generally does not provide a seal for the inserted instrument, but automatically closes and forms a seal when the instrument is removed. The sealing membrane grips the instrument and forms a seal as the instrument is inserted.

When the puncture tube assembly is secured to the abdominal wall of a patient, the hollow tube thereof may be divided into an external body section (length H1), a body wall section (length H2) and an internal body section (length H3). The length H2 of the body wall segment varies, and when applied to different patients, the abdominal wall thickness varies from patient to patient, e.g., the difference between obese patients and the smaller abdominal wall thickness is greater; the wall section H2 varies for different puncture positions and puncture angles even when used with the same patient. The length H1 of the extracorporeal section cannot be reserved too long or too short, which is inconvenient for inserting the instrument, and especially when the puncture tube component is used as a main operation hole and needs to be repeatedly switched, the puncture tube component is too short which is inconvenient for operating the instrument at different inclination angles. The length H3 of the in-vivo section is not changed greatly generally, and is reserved for 20-30 mm. The length of the hollow tube of the puncture tube assembly in the prior art is fixed, and the requirements of different scene in the field cannot be met.

Disclosure of Invention

In one aspect of the invention, a hollow tube assembly for a puncture instrument including a rotation plug includes an outer tubing, an inner tubing, and a rotation plug. The outer tube including an outer tube proximal end and an outer tube distal end and an outer tube wall extending therebetween, the outer tube wall defining a first hollow channel; the outer pipeline also comprises an axial tunnel arranged along the axial direction of the outer pipeline, the tunnel comprises a first tunnel side wall and a second tunnel side wall which are connected with the outer pipeline into a whole, and also comprises a tunnel top wall connected with the first tunnel side wall and the second tunnel side wall, and the first tunnel side wall, the second tunnel side wall and the tunnel top wall define a tunnel channel communicated with the first hollow channel; the tunnel extends axially to the vicinity of the distal end of the outer tube to form a closed tunnel end. The inner conduit comprises an inner conduit proximal end and an inner conduit distal end and an inner conduit wall extending therebetween, the inner conduit wall outer surface comprising an inner conduit outer cylindrical surface, the outer surface of the inner conduit proximal end comprising an outer bump; the inner pipeline is arranged in the outer pipeline, wherein the shape and the size of the outer cylindrical surface of the inner pipeline are matched with those of the first hollow channel, the outer lug is matched with the tunnel channel, the inner pipeline is limited to rotate relative to the outer pipeline, and the inner pipeline can move axially relative to the outer pipeline. The first tunnel side wall includes a circumferential chute communicating with the tunnel passage, the rotary bolt includes a latch having a shape and a size matching the circumferential chute, the rotary bolt is installed at an outer side of the first tunnel side wall, wherein the latch is inserted into the circumferential chute.

In one solution, the rotating bolt comprises an unlocked state and a locked state, in which the rotating bolt is rotated towards the inside of the tunnel passage so that the latch enters the tunnel passage; in the unlocked state, the rotary bolt is rotated towards the exterior of the tunnel passage such that the latch exits the tunnel passage.

In another scheme, the tunnel further comprises a near-end plug, the shape and the size of the near-end plug are matched with those of the tunnel channel, and the near-end plug is installed at the near end of the tunnel.

In yet another aspect, the hollow tube assembly comprises a proximal fixed state, a mobile state, and a distal fixed state; in the proximal end fixing state, the rotating bolt is in a locking state, and the outer convex block is limited between the proximal end plug and the proximal end of the latch, so that the inner pipeline is limited to move axially relative to the outer pipeline; in the far end fixing state, the rotating bolt is in a locking state, and the outer convex block is limited between the end of the tunnel and the far end of the latch, so that the inner pipeline is limited to move axially relative to the outer pipeline; in the mobile state, the rotating bolt is in the unlocked state and the inner pipe can move axially relative to the outer pipe.

In another scheme, the hollow tube assembly can be switched from a proximal end fixing state to a moving state and then to a distal end fixing state; or the far-end fixed state can be switched to the moving state and then to the near-end fixed state.

In yet another aspect, the outer surface of the outer tube distal end includes a rotation track, the rotation peg includes a rotation peg body, the rotation peg body is mounted in the rotation track, and the rotation peg body is movable and rotatable in the rotation track.

In yet another aspect, the system further comprises a latch seal, the latch seal comprising a seal bore shaped and dimensioned to mate with the latch, the latch seal being mounted to an exterior side of the first tunnel sidewall with the seal bore substantially aligned with the circumferential chute; and an air seal is formed between the latch sealing ring and the latch, so that the air in the outer pipeline is prevented from leaking through a fit clearance between the annular sliding groove and the latch.

In yet another aspect, the hollow tube assembly further comprises a tube end seal mounted at the distal end of the outer tube, the tube end seal comprising a proximal elastomeric ring and a distal elastomeric ring; the far end of the outer pipe comprises an outer cylindrical surface at the tail of the outer pipe, and the sealing element is fixed outside the outer cylindrical surface at the tail of the outer pipe; the inner pipeline comprises an outer cylindrical surface of the inner pipeline, and the distal end elastic ring is matched with the outer cylindrical surface of the inner pipeline to form a seal.

In yet another aspect, a puncture tube assembly comprises a hollow tube assembly as described in any of the preceding claims, further comprising a sealing assembly, wherein the proximal end of the hollow tube assembly is connected to and forms a gas tight seal with the distal end of the sealing assembly.

In one aspect of the present invention, a hollow tube assembly for a puncture instrument is provided that includes an outer tubing, an inner tubing, and a rotating plug. The outer tube including an outer tube proximal end and an outer tube distal end and an outer tube wall extending therebetween, the outer tube wall defining a first hollow channel; the outer pipeline still includes the axial tunnel that sets up along its axis direction, the tunnel contains the tunnel roof of being connected with first tunnel lateral wall and second tunnel lateral wall that links as an organic whole with outer pipe wall and with it, the tunnel contains the tunnel passageway with first cavity passageway UNICOM. The inner conduit comprises an inner conduit proximal end and an inner conduit distal end and an inner conduit wall extending therebetween, the inner conduit wall outer surface comprising an inner conduit outer cylindrical surface, the outer surface of the inner conduit proximal end comprising an outer bump; the inner pipeline is arranged in the outer pipeline, wherein the shape and the size of the outer cylindrical surface of the inner pipeline are matched with those of the first hollow channel, the outer lug is matched with the tunnel channel, the inner pipeline is limited to do rotary motion relative to the outer pipeline, and the inner pipeline can axially move relative to the outer pipeline. The rotary bolt including a rotary bolt body proximal end and a rotary bolt body distal end and a rotary bolt body extending therebetween, the locking teeth extending outwardly from the rotary bolt body; first tunnel lateral wall contains the hoop spout with tunnel passageway UNICOM, and rotatory bolt is installed in the outside of first tunnel lateral wall, and wherein the locking tooth inserts in the hoop spout, rotatory bolt can be in the hoop spout for outer pipeline do the hoop and rotate.

In one scheme, a plurality of lock teeth of the rotating bolt are distributed approximately uniformly along the length direction of the rotating bolt body, and in another scheme of two adjacent locks, the rotating bolt comprises an unlocking state and a locking state; in a locking state, the rotating bolt rotates towards the interior of the tunnel channel so that the locking teeth enter the tunnel channel; in the unlocked state, the rotary bolt is rotated towards the outside of the tunnel passage so that the locking teeth are withdrawn from the tunnel passage and are closed.

In yet another aspect, the hollow tube assembly comprises a fixed state and a mobile state; in a fixed state, the rotating bolt is in a locked state, and the outer convex block is limited between two adjacent locking teeth, so that the inner pipeline is limited to move axially relative to the outer pipeline; in the mobile state, the rotating bolt is in the unlocked state and the inner pipe can move axially relative to the outer pipe.

In a further embodiment, the rotary latch comprises m locking teeth, wherein m > 3; the m locking teeth are approximately uniformly distributed along the length direction of the rotating bolt main body, the distance between two adjacent locking teeth is X2, the locking teeth are a first locking tooth, a second locking tooth … … and an mth locking tooth in sequence from the proximal end to the distal end; the length of the hollow tube assembly comprises m-1 length settings; when the outer protrusion is matched with the first and second locking teeth, the length of the hollow tube assembly is Lt1, namely the initial length; when the outer lug is matched with the second third locking tooth, the length of the hollow tube assembly is Lt 2; by analogy, when the outer lug is matched with the m-1 th locking tooth and the m-1 th locking tooth, the length of the hollow pipe assembly is Ltm-1. The inner pipeline length is Ltm-1, and the following relation is satisfied:

Ltm-1＝Lt1+(m-1)*X2

ltm-1, the length of the hollow tube component when the mth locking tooth is matched with the mth locking tooth; lt1 — length of the hollow tube assembly when the outer tab mates with the first and second locking teeth; m is the serial number of the annular through groove; x2-spacing of two adjacent locking teeth.

In another scheme, the rotary bolt sealing device further comprises a rotary bolt sealing ring, wherein the rotary bolt sealing ring comprises a sealing hole matched with the rotary bolt main body in shape and size; the rotary bolt sealing ring is arranged on the outer side surface of the side wall of the first tunnel, and a sealing hole of the rotary bolt sealing ring is basically aligned with the annular sliding groove; the rotary bolt sealing ring and the rotary bolt main body form air seal, and air in the outer pipeline is prevented from leaking through a fit clearance between the annular sliding groove and the rotary bolt main body.

In another aspect, the medical tube further comprises a tube tail sealing element arranged at the distal end of the outer tube, wherein the tube tail sealing element comprises a proximal elastic ring and a distal elastic ring; the far end of the outer pipe comprises an outer cylindrical surface at the tail of the outer pipe, and the sealing element is fixed outside the outer cylindrical surface at the tail of the outer pipe; the inner pipeline comprises an outer cylindrical surface of the inner pipeline, and the distal end elastic ring is matched with the outer cylindrical surface of the inner pipeline to form a seal.

In another aspect, a method for adjusting the length of a hollow tube assembly of a puncture tube assembly comprises the steps of:

s1: rotating the rotating bolt in a direction outside the tunnel passage so that the locking teeth exit the tunnel passage, thereby causing the rotating bolt to transition from the locked state to the unlocked state;

s2: pulling the inner sleeve axially along the outer pipe to a desired length;

s3: and rotating the rotating bolt towards the inner direction of the tunnel channel and matching with the inner sleeve to move axially, so that the outer lug is clamped between the locking teeth, and the rotating bolt is converted from an unlocking state to a locking state.

In one aspect of the present invention, an axially retractable puncture tube assembly is presented comprising a seal assembly and a hollow tube assembly, the seal assembly comprising a first seal assembly and a second seal assembly; the second seal comprises a second capsule comprising a proximal capsule end and a distal capsule end and a wall portion extending therebetween. The near end of the hollow pipe component is connected with the far end of the bin body to form sealing. The hollow tube assembly includes an outer tube, an inner tube, and a rotating plug. The outer tube including an outer tube proximal end and an outer tube distal end and an outer tube wall extending therebetween, the outer tube wall defining a first hollow channel; the outer pipeline still includes the axial tunnel that sets up along its axis direction, the tunnel contains the tunnel roof of being connected with first tunnel lateral wall and second tunnel lateral wall that links as an organic whole with outer pipe wall and with it, the tunnel contains the tunnel passageway with first cavity passageway UNICOM. The inner conduit comprises an inner conduit proximal end and an inner conduit distal end and an inner conduit wall extending therebetween, the inner conduit wall outer surface comprising an inner conduit outer cylindrical surface, the outer surface of the inner conduit proximal end comprising an outer bump; the inner pipeline is arranged in the outer pipeline, wherein the shape and the size of the outer cylindrical surface of the inner pipeline are matched with those of the first hollow channel, the outer lug is matched with the tunnel channel, the inner pipeline is limited to do rotary motion relative to the outer pipeline, and the inner pipeline can axially move relative to the outer pipeline. The rotary bolt comprises a rotary bolt main body, and the lock teeth extend outwards from the rotary bolt main body; first tunnel lateral wall contains the hoop incision with tunnel passageway UNICOM, and rotatory bolt is installed in the outside of first tunnel lateral wall, and wherein the locking tooth inserts in the hoop incision, rotatory bolt can be in the hoop incision for outer pipeline do the hoop and rotate.

In one scheme, the circumferential notch comprises a plurality of circumferential through holes, and the plurality of circumferential through holes are uniformly arranged in the side wall of the first tunnel along the axial direction of the outer pipeline; the plurality of locking teeth are approximately uniformly distributed along the length direction of the rotating bolt main body, and two adjacent locking teeth define a locking groove; the shape, size and position relation of the locking teeth are matched with the annular through hole.

In yet another aspect, the rotating bolt includes an unlocked state and a locked state; in a locking state, the rotating bolt rotates towards the interior of the tunnel channel so that the locking teeth enter the tunnel channel; in the unlocked state, the rotary bolt is rotated towards the outside of the tunnel passage so that the locking teeth are withdrawn from the tunnel passage and are closed.

In another embodiment, the tunnel comprises a tunnel end, the rotating bolt comprises m locking teeth, wherein m is greater than 3, the m locking teeth are substantially uniformly distributed along the length direction of the rotating bolt body from the proximal end to the distal end, and the locking teeth are sequentially a first locking tooth, a second locking tooth … … and an m locking tooth; two adjacent lock teeth define a lock slot having a width dimension X1 along the length of the tumbler body and a spacing X2 between the two adjacent lock teeth; the distance between the mth locking tooth and the end of the tunnel is equal to X1; when the outer convex block is limited between the mth locking tooth and the end of the tunnel, the inner pipeline can be limited to move axially relative to the outer pipeline.

In yet another aspect, the length of the hollow tube assembly comprises m length settings, and when the outer protrusion is matched with the first and second locking teeth, the length of the hollow tube assembly is Lt1, which is referred to as the initial length; when the outer lug is matched with the second third locking tooth, the length of the hollow tube assembly is Lt 2; by analogy, when the outer lug is matched with the m-1 th locking tooth and the m-1 th locking tooth, the length of the hollow pipe assembly is Ltm-1. The length of the hollow tube assembly is Ltm when the outer projection is matched with the mth locking tooth and the end of the tunnel is matched. The inner pipe length of Ltm satisfies the following relationship:

Ltm＝Lt1+m*X2

ltm-length of the hollow tube component when the outer projection matches the mth locking tooth and the tunnel end; lt1 — length of the hollow tube assembly when the outer tab mates with the first and second locking teeth; m is the serial number of the annular through groove; x2-spacing of two adjacent locking teeth.

In another scheme, the rotary bolt sealing device further comprises a rotary bolt sealing gasket, wherein the rotary bolt sealing gasket comprises a rotary bolt sealing sheet body and a locking tooth sealing hole penetrating through the sheet body; the rotary bolt sealing gasket is adhered to the outer part of the top wall of the tunnel, wherein the locking tooth sealing hole is basically aligned with the annular through hole; and air seal is formed between the locking tooth sealing hole and the locking tooth, so that air in the outer pipeline is prevented from leaking through a fit clearance between the annular through hole and the locking tooth.

In another aspect, the method for adjusting the length of the hollow tube assembly of the puncture tube assembly comprises the following steps:

s2: pulling the inner sleeve axially along the outer pipe to a desired length;

In one aspect of the present invention, a puncture instrument is provided that includes a puncture tube assembly and a puncture needle extending through the puncture tube assembly.

Drawings

For a fuller understanding of the nature of the present invention, reference should be made to the following detailed description taken together with the accompanying figures in which:

FIG. 1 is an exploded view of a seal assembly 2;

FIG. 2 is a cross-sectional view of the seal assembly 2;

FIG. 3 is a cross-sectional view of the seal assembly 2 at 90 from FIG. 2;

FIG. 4 is a perspective view of an outer tube 500;

FIG. 5 is a transverse cross-sectional view of an outer tube 500;

fig. 6 is a schematic perspective view of an inner conduit 600;

FIG. 7 is a perspective view of the turn key 700;

figure 8 is a perspective view of hollow tube assembly 3;

figure 9 is a side view of hollow tube assembly 3;

FIG. 10 is a cross-sectional view 10-10 of FIG. 9;

figure 11 is a perspective view of the puncture tube assembly 1;

FIG. 12 is an axial cross-sectional view of the spike assembly 1 a;

FIG. 13 is a perspective view of the second capsule 230;

FIG. 14 is an enlarged view 14-14 of FIG. 12;

FIG. 15 is a perspective view of the turn key 700 b;

figure 16 is a side view of hollow tube assembly 3 b;

FIG. 17 is a cross-sectional view of 17-17 of FIG. 16;

FIG. 18 is a side view of the spike assembly 1 b;

FIG. 19 is a perspective view of outer tubing 500 c;

FIG. 20 is a perspective view of the rotary bolt seal 60 c;

fig. 21 is a side view of hollow tube assembly 3 c;

FIG. 22 is a cross-sectional view 22-22 of FIG. 21;

the same reference numbers will be used throughout the drawings to refer to identical or similar parts or elements.

Detailed Description

Embodiments of the present invention are disclosed herein, however, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which can be embodied in various forms. Therefore, the disclosure herein is not to be interpreted as limiting, but merely as a basis for the claims and as a basis for teaching one skilled in the art how to employ the present invention. Embodiments of the present disclosure will now be described in detail with reference to the drawings, where for convenience, the party proximal to the operator is defined as the proximal end and the party distal from the operator is defined as the distal end.

Figures 1-13 depict a puncture tube assembly 1 for use in laparoscopic procedures. The spike assembly 1 comprises a sealing assembly 2 and a hollow tube assembly 3. Fig. 1-3 depict the structure and composition of the seal assembly 2. The seal assembly 2 may be divided into a first seal assembly 100 and a second seal assembly 200. The first seal assembly 100 is also referred to as an instrument seal assembly, and when an external instrument is inserted, the central bore of the first seal assembly grips the instrument to form an air tight seal. The second sealing assembly is also called a zero sealing assembly, when an external instrument is not inserted, the zero sealing assembly automatically closes to form sealing, when the external instrument is inserted, the zero sealing assembly opens, and no sealing is formed between the zero sealing assembly and the instrument. The locking groove 239 of the component 200 and the locking hook 112 of the component 100 are fastened in a matching manner. The hook 112 and the slot 239 can be quickly detached by one hand. The connection between the assembly 100 and the assembly 200 is implemented in a variety of ways. Besides the structure shown in the embodiment, the structure can also adopt a threaded connection, a rotary buckle or other quick locking structures. Alternatively, the assembly 100 and the assembly 200 may be designed in a configuration that is not quickly detachable.

Fig. 1-3 depict the composition and assembled relationship of the first seal assembly 100. The seal membrane assembly 180 is sandwiched between the first seal housing 110 and the first seal cartridge 190. The proximal end 132 of the seal membrane assembly 180 is secured between the inner ring 116 of the first seal housing 110 and the inner ring 196 of the first seal cartridge 190. The fixing mode between the first sealing bin 190 and the first sealing seat 110 is various, and can adopt the modes of interference fit, ultrasonic welding, gluing, fastening and the like. The housing wall 191 of the first seal cartridge 190 and the housing wall 111 of the first seal housing 110 are fixed by ultrasonic welding. This securement places the proximal end 132 of the sealing membrane assembly 180 in compression.

Fig. 1-3 depict the composition and assembly of the sealing membrane assembly 180. The sealing membrane assembly 180 includes a lower fixing ring 120, a sealing membrane 130, a protector 160, and an upper fixing ring 170. The sealing membrane 130 and the protector 160 are sandwiched between the lower fixing ring 120 and the upper fixing ring 170. And the posts 121 of the lower retaining ring 120 are aligned with corresponding holes in the other components of the assembly 180. The post 121 is an interference fit with the hole 171 of the upper retaining ring 170 so that the entire sealing membrane assembly 180 is in a compressed state. The protector 160 comprises 4 sequentially overlapping protector sheets 163 for protecting the central seal of the sealing membrane 130 from perforation or tearing by the sharp edges of an inserted surgical instrument. The sealing membrane 130 includes a proximal end 132, a distal sealing lip 134, and a sealing wall extending proximally from the distal end, the sealing wall having a proximal face and a distal face. The sealing lip 134 is adapted to receive an inserted instrument and form an air seal. The sealing membrane 130 further includes a flange 136; the sealing wall 135 is connected at one end to the sealing lip 134 and at the other end to the flange 136; the floating portion 137 is connected at one end to the flange 136 and at the other end to the proximal end 132. The flange 136 is used to mount the guard 160. The floating portion 137 contains one or more radial (transverse) folds, thereby enabling the entire sealing membrane assembly 180 to float in the assembly 200.

Fig. 3-4 depict the composition and assembled relationship of the second seal assembly 200. The second capsule 230 comprises a proximal cartridge body end 232 and a distal cartridge body end 234 and a wall portion 235 extending therebetween. The second capsule 230 also has an inner wall 236 supporting the duckbill seal and an air valve mounting hole 237 communicating with the inner wall. The inner wall 236 defines a central through-hole 233 extending through the proximal end 232 and the distal end 234. The valve spool 280 is mounted in the valve body 270 and together in the mounting hole 237. The flange 256 of the duckbill seal 250 is sandwiched between the inner wall 236 and the second seal seat 260. The fixed mode between second seal receptacle 260 and the second sealed storehouse 230 has the multiple, can adopt interference fit, ultrasonic bonding, bonds, modes such as buckle fixed. The 4 mounting posts 268 of the second seal carrier 260 in this embodiment have an interference fit with the 4 mounting holes 238 of the second seal cartridge 230, which interference fit places the duckbill seal 250 in a compressed state. In this embodiment, the duckbill seal 250 is a single slit, but other types of closure valves, including flapper-type valves, multi-slit duckbill valves, may be used. The duckbill 253 can open when an external instrument is passed through the duckbill seal 250, but it typically does not provide a complete seal against the instrument. The duckbill 253 automatically closes when the instrument is removed.

Fig. 4-11 depict the structure and composition of a hollow tube assembly 3, said hollow tube assembly 3 comprising an outer tubing 500, an inner tubing 600 and a swivel bolt 700. Fig. 4-5 depict the structure and composition of the outer tubing 500. The outer tube 500 includes an outer tube proximal end 510 and an outer tube distal end 530 and an outer tube wall 520 extending therebetween. The outer tube wall 520 defines a first hollow channel 521. The outer tube distal end 530 includes an outer tube cylindrical tail surface 540. The outer pipe 500 further comprises an axial tunnel 550 arranged in the axial direction thereof, the tunnel 550 comprising a first tunnel side wall 551 and a second tunnel side wall 552 integral with the outer pipe wall 520, and a tunnel top wall 553 connecting the

tunnel side walls

551, 552. The

tunnel side walls

551, 552 and the tunnel top wall 553 define a tunnel passage 555 communicating with the first hollow passage 521. In this example, the cross-section of the tunnel 550 is approximately U-shaped, but may be V-shaped, T-shaped, polygonal, or other non-closed wall patterns including openings. The tunnel 550 defines a tunnel entrance 557 at the outer tube proximal end 510, and the tunnel 550 extends axially to the vicinity of the outer tube distal end 530 to define a walled-off tunnel end 559. The first tunnel side wall 551 includes circumferential runners 561 extending therethrough. In an alternative embodiment, the outer surface of the outer tube distal end 530 includes a rotational track 570. In this example, the rotation rail 570 includes a transverse rotation wall 571 integrally connected with the outer pipe wall 520 and a longitudinal rotation wall 573 connected therewith, and the transverse rotation wall 571 and the longitudinal rotation wall 573 constitute an approximately L-shaped rotation rail.

As shown in fig. 6, the inner conduit 600 includes an inner conduit proximal end 610 and an inner conduit distal end 630 with an inner conduit wall 620 extending therebetween. The inner surface of the inner conduit wall defines a second hollow channel 621 while the outer surface comprises an outer cylindrical surface 670 of the inner conduit having a diameter Dw 1. The inner tube distal end 630 defines an open tube lip 631. The outer surface of the inner tube proximal end 610 includes outer nubs 640.

Referring to fig. 7, the rotary bolt 700 includes a rotary bolt body 710 and a latch 720 coupled thereto. The latch 720 includes a latch proximal end 721 and a latch distal end 727. The rotation bolt body 710 includes a rotation bolt lever 715 extending laterally outward.

Fig. 8-10 depict the assembled relationship of the hollow tube assembly 3. The inner conduit 600 is mounted inside the outer conduit 500 with the outer cylindrical surface 670 of the inner conduit shaped and dimensioned to fit the first hollow channel 521 and the outer protrusion 640 to fit the tunnel channel 555 to limit rotational movement of the inner conduit 600 relative to the outer conduit 500, the inner conduit 600 being axially movable relative to the outer conduit 500. The rotation bolt 700 is installed at the outside of the first tunnel side wall 551 with a latch inserted into the circumferential slide groove 561, the latch 720 having a shape and size corresponding to the circumferential slide groove 561, the rotation bolt body 710 having a shape and size corresponding to the rotation rail 570, and the rotation bolt 700 being rotatable in the circumferential direction of the circumferential slide groove 561 with respect to the outer pipe 500.

As shown in fig. 10, the hollow tube assembly 3 further includes a proximal plug 50 which is shaped and dimensioned to mate with the tunnel passageway 555, the proximal plug being mounted at the proximal end of the tunnel 550. The fixing mode includes but is not limited to interference connection, glue bonding, ultrasonic welding and heating welding. The hollow tube assembly 3 further includes a latch seal 60 comprising a sealing aperture shaped and dimensioned to mate with the latch; the latch sealing ring 60 is mounted (bonded) on the outer side surface of the first tunnel side wall, and the sealing hole of the latch sealing ring is basically aligned with the annular sliding groove; and an air seal is formed between the latch sealing ring and the latch, so that the air in the outer pipeline is prevented from leaking through a fit clearance between the annular sliding groove and the latch.

Referring now to fig. 9-10, the rotating bolt 700 includes an unlocked state and a locked state. In the locked state, the rotary bolt 700 is rotated towards the inside of the tunnel passage 555 so that the latch 720 enters the tunnel passage; in the unlocked state, the rotating bolt 700 is rotated towards the outside of the tunnel passage 555 so that the latch 720 exits the tunnel passage.

The hollow tube assembly 3 comprises a proximal fixed state, a mobile state and a distal fixed state. Figure 10 depicts hollow tube assembly 3 in a proximally secured position with the rotating bolt 700 in a locked position and the outer protrusion 640 captured between proximal plug 50 and latch proximal end 721 to thereby limit axial movement of the inner conduit relative to the outer conduit. In a proximally fixed state, the hollow tube assembly 3 comprises a shortest length Lmin. In the distal fixed position, the rotating bolt 700 is in the locked position and the outer protrusion 640 is trapped between the tunnel end 559 and the latch distal end 727, thereby restricting axial movement of the inner conduit relative to the outer conduit. In the distal fixation state, the hollow tube assembly 3 comprises a maximum length Lmax. In the moving state, the rotating bolt 700 is in the unlocked state, and the inner pipe is axially movable relative to the outer pipe.

As shown in fig. 9-10, hollow tube assembly 3 further comprises a tube end seal 800 mounted on the distal end of the outer tube, said tube end seal 800 comprising a proximal elastomeric ring 810 having an inner diameter Dt1 and a distal elastomeric ring 830 having an inner diameter Dt 3. The seal 800 is mounted on the outside of the outer cylindrical surface 540, wherein the proximal elastic ring 810 mates with the outer cylindrical surface 540 to form a hermetic seal, and the distal elastic ring 830 mates with the outer cylindrical surface 670 of the inner conduit to form a hermetic seal. In one embodiment, the proximal elastic ring 810 and the outer tube tail cylindrical surface 540 are fixed by glue.

As shown in fig. 11, the puncture tube assembly 1 comprises a sealing assembly 2 and a hollow tube assembly 3, and the proximal end of the hollow tube assembly 3 is connected to the distal end of the sealing assembly 2 and forms an airtight seal. The second seal cartridge 230 has a cartridge body distal end 234 that is shaped and dimensioned to mate with the outer tube proximal end 510, and the cartridge body distal end 234 is connected to and forms an airtight seal with the outer tube proximal end 510. In one scheme, the far end 234 of the bin body is firmly connected with the near end 510 of the outer tube by adopting a glue bonding method to form air seal; another method employs an interference fit to securely couple and form an air tight seal between the cartridge body distal end 234 and the outer tube proximal end 510. The method of connecting the sealing member 2 and the hollow tube member 3 includes various ways in addition to the above-listed methods. For example, a sealing ring is added to the outside of the tip of the outer tube 500, and the outer tube tip and the distal end of the cartridge body are firmly connected and hermetically sealed by a conventional snap-fit connection or a threaded connection. As shown in fig. 11, the cartridge body distal end 234 of the second capsule 230 in this example includes an extension conduit 2343 and an extension baffle 2347 extending distally. The extension tubing 2343 is shaped and dimensioned to fit within the outer tube proximal end 510, and the extension tubing 2343 is coupled to the outer tube proximal end 510 and forms an airtight seal. The extension bezel 2347 mates with the outer surface of the outer conduit, the extension bezel 2347 sized and positioned to prevent the rotation peg 700 from disengaging from the circumferential runner 561.

It will be appreciated by those skilled in the art that the hollow tube assembly of the puncture tube assembly 1 comprises two lengths, the shortest length Lmin and the longest length Lmax, and when the puncture tube assembly 1 is used in laparoscopic surgery, the surgeon can switch the length of the hollow tube assembly of the puncture tube assembly 1 between Lmin and Lmax according to the thickness of the abdominal wall of the patient, the position and puncture angle of the puncture tube assembly, the personal operation habit and the like, and the length switching method comprises the following steps:

s1: pushing the rotary bolt operating rod towards the outer rotation direction of the tunnel channel to enable the lock bolt to exit the tunnel channel, so that the rotary bolt is converted from the locking state to the unlocking state;

s2: pulling the inner sleeve along the axial direction of the outer pipeline, and moving from the near end to the far end or from the far end to the near end;

s3: the rotary bolt operating lever is pushed toward the inside of the tunnel passage so that the latch bolt enters the tunnel passage to thereby convert the rotary bolt from the unlocked state to the locked state.

Fig. 12-14 depict yet another improved spike assembly 1a, said spike assembly 1a comprising a sealing assembly 2 and a hollow tube assembly 3 a. The hollow tube assembly 3a includes an outer tube 500, an inner tube 600, a rotary bolt 700, a latch seal ring 60 and a tube end seal 800, and the matching relationship between the components is the same as that in the hollow tube assembly 3, and will not be described herein again. The hollow tube assembly 3a is substantially identical in construction and composition to hollow tube assembly 3 except that hollow tube assembly 3a does not include proximal plug 50.

Referring to fig. 12-14, the cartridge body distal end 234 of the second capsule 230 includes a distal flange 2341, and an extension duct 2343 and an extension cantilever 2345 extending distally from the distal flange 2341, the extension duct 2343 further including an extension baffle 2347 extending distally. As shown in fig. 12 and 14, the puncture tube assembly 1a comprises a sealing assembly 2 and a hollow tube assembly 3a, and the proximal end of the hollow tube assembly 3a is connected to the distal end of the sealing assembly 2 and forms a hermetic seal. In this example, the extension conduit 2343 of the second capsule 230 is shaped and dimensioned to mate with the outer tube proximal end 510, and the extension conduit 2343 is coupled to the outer tube proximal end 510 and forms an airtight seal. In one approach, the extension conduit 2343 is securely attached to the outer tube proximal end 510 by glue bonding and forms a hermetic seal; another method of interference fitting is to securely connect the extension conduit 2343 to the outer tube proximal end 510 and form a gas tight seal. The extended cantilever 2345 is shaped and sized to match the proximal end of the tunnel.

The rotating bolt 700 in the spike assembly 1a comprises an unlocked state and a locked state. In the locked state, the rotary bolt 700 moves toward the axial center of the outer pipe 500 so that the latch 720 enters the tunnel passage; in the unlocked state, the rotating bolt 700 is moved away from the axial center of the outer pipe 500 such that the latch 720 exits the tunnel passage. The spike assembly 1a comprises a proximal, stationary state, a mobile state and a distal, stationary state. Fig. 12 and 14 depict the penetration tube assembly 1a in a proximally fixed state. In the proximally secured state, the rotating bolt 700 is in the latched state and the outer protrusion 640 is restrained between the extended cantilever 2345 and the latch proximal end 721, thereby limiting axial movement of the inner conduit relative to the outer conduit. In a proximally fixed state, the hollow tube assembly of the spike assembly 1a includes a shortest length Lmin. In the distal fixed position, the rotating bolt 700 is in the locked position and the outer protrusion 640 is trapped between the tunnel end 559 and the latch distal end 727, thereby restricting axial movement of the inner conduit relative to the outer conduit. In the distally secured state, the hollow tube assembly of the spike assembly 1a comprises a longest length Lmax. In the mobile state, the rotation bolt 700 is in the unlocked state, and the inner pipe can move axially relative to the outer pipe. The extension bezel 2347 is sized and positioned to prevent the rotation pin 700 from disengaging from the circumferential slide slot 561.

Fig. 15-17 depict the structure and composition of yet another modified hollow tube assembly 3b, said hollow tube assembly 3b comprising an outer tube 500, an inner tube 600, a rotating plug 700b and a rotating plug seal 60. The hollow tube assembly 3b is similar to the hollow tube assembly 3a except for the provision of a rotating plug. As shown in fig. 15, the turn key 700b includes a turn key body proximal end 711 and a turn key body distal end 719 with a turn key body 710 extending therebetween. The teeth 720b extend outwardly from the body 710, and a plurality of teeth 720b are substantially evenly distributed along the length of the body 710, with two adjacent teeth 720b defining a locking slot 730 b. The width of the locking groove 730b along the length of the rotary bolt body 710 is X1, and the distance between two adjacent locking teeth is X2 (obtained by measuring the distance between the geometric centers of two adjacent locking teeth).

Figures 16-17 depict the assembled relationship of the hollow tube assembly 3 b. The inner conduit 600 is mounted inside the outer conduit 500b, wherein the inner conduit has an outer cylindrical surface 670 shaped and dimensioned to fit the first hollow channel 521, and wherein the outer protrusion 640 fits into the tunnel channel 555 to limit rotational movement of the inner conduit 600 relative to the outer conduit 500b, and wherein the inner conduit 600 is axially movable relative to the outer conduit 500 b. The latch sealing ring 60 is mounted (bonded) on the outer side surface of the first tunnel side wall, and the sealing hole of the latch sealing ring is basically aligned with the annular sliding groove; and an air seal is formed between the latch sealing ring and the latch, so that the air in the outer pipeline is prevented from leaking through a fit clearance between the annular sliding groove and the latch. The rotation pin 700b is installed at the outside of the first tunnel side wall 551 with the locking teeth inserted into the circumferential slide groove 561, the rotation pin body 710 is shaped and sized to match the rotation rail 570, and the rotation pin 700b can rotate in the circumferential slide groove 561 in the circumferential direction with respect to the outer pipe 500.

Similarly, the rotating bolt 700b includes an unlocked state and a locked state. In the locked state, the rotating bolt 700b is rotated toward the inside of the tunnel passage 555 so that the locking teeth 720b enter the tunnel passage; in the unlocked state, the rotating bolt 700 is rotated towards the outside of the tunnel passage 555 so that the locking teeth 720b exit the tunnel passage.

The hollow tube assembly 3b includes a fixed state and a movable state. Figure 17 depicts hollow tube assembly 3b in a secured state. In the fixed state, the rotating bolt 700b is in the locked state, and the outer protrusion 640 is restricted between two adjacent locking teeth 720b, so as to restrict the inner pipe from moving axially relative to the outer pipe. In the moving state, the rotating bolt 700b is in the unlocked state, and the inner pipe is axially movable relative to the outer pipe.

As in fig. 17, the hollow tube assembly 3b further comprises a tube end seal 800 mounted on the distal end of the outer tube, said seal 800 being mounted on the outside of the outer tube cylindrical surface 540, wherein the proximal elastic ring 810 mates with the outer tube cylindrical surface 540 to form an airtight seal, and the distal elastic ring 830 mates with the inner tube cylindrical surface 670 to form an airtight seal.

In one embodiment, the rotating pin 700b includes m (m ≧ 3) locking teeth 720b, the m locking teeth 720b are substantially uniformly distributed along the length of the rotating pin body 710, and the spacing between two adjacent locking teeth is X2. From the proximal end to the distal end, the locking tooth 720b is a first, a second … …, and an mth locking tooth 720b in sequence. The length of the hollow tube assembly comprises m-1 length settings; when the outer protrusion is matched with the first and second locking teeth, the length of the hollow tube assembly is Lt1, namely the initial length; when the outer lug is matched with the second third locking tooth, the length of the hollow tube assembly is Lt 2; by analogy, when the outer lug is matched with the (m-1) th locking tooth, the length of the hollow pipe assembly is Lt_m-1. The length of the inner pipeline is Lt_m-1The following relationship is satisfied:

Lt_m-1＝Lt1+(m-1)*X2

wherein, Lt is_m-1-length of the hollow tube assembly when the mth locking tooth is mated; lt1 — length of the hollow tube assembly when the outer tab mates with the first and second locking teeth; m is the serial number of the annular through groove; x2-spacing of two adjacent locking teeth.

As shown in fig. 18, the puncture tube assembly 1b comprises a sealing assembly 2 and a hollow tube assembly 3b, wherein the proximal end of the hollow tube assembly 3b is connected to the distal end of the sealing assembly 2 and forms an airtight seal. In this example, the second capsule 230 has a distal cartridge body end 234 that is shaped and dimensioned to mate with the outer tube proximal end 510, and the distal cartridge body end 234 is joined to and hermetically seals with the outer tube proximal end 510. In one scheme, the far end 234 of the bin body is firmly connected with the near end 510 of the outer tube by adopting a glue bonding method to form air seal; another method employs an interference fit to securely couple and form an air tight seal between the cartridge body distal end 234 and the outer tube proximal end 510.

It will be appreciated by those skilled in the art that when the puncture tube assembly 1b is used in laparoscopic surgery, the surgeon can change the overall length of the hollow tube assembly of the puncture tube assembly and adjust the fixed depth of the puncture tube assembly in the abdominal wall according to the thickness of the abdominal wall of the patient, the position and puncture angle of the puncture tube assembly, and the personal operation habit, etc., so that the desired arrangement of the external section (length H1), the internal section (length H2) and the internal section (length H3) of the puncture tube assembly is achieved. The method of adjusting the length of the hollow tube of the puncture tube assembly 1b comprises the steps of:

s2: pulling the inner sleeve axially along the outer pipe to a desired length;

Fig. 19-22 depict the structure and composition of yet another modified hollow tube assembly 3c, which hollow tube assembly 3c includes an outer conduit 500c, an inner conduit 600, a rotating plug 700b and a rotating plug seal 60 c. The hollow tube assembly 3c is similar to the hollow tube assembly 3b, except for the provision of the outer conduit and the rotating plug gasket. Fig. 19 depicts the structure of the outer tubing 500c, which outer tubing 500c is similar to the outer tubing 500. The outer tube 500c includes an outer tube proximal end 510 and an outer tube distal end 530 and an outer tube wall 520 extending therebetween. The outer tube wall 520 defines a first hollow channel 521. The outer tube distal end 530 includes an outer tube cylindrical tail surface 540. The outer pipe 500 further comprises an axial tunnel 550c arranged in the axial direction thereof, the tunnel 550c comprising a first tunnel side wall 551c and a second tunnel side wall 552 integral with the outer pipe wall 520, and a tunnel top wall 553 connecting the

tunnel side walls

551c, 552. The

tunnel side walls

551c, 552 and the tunnel top wall 553 define a tunnel passage 555 communicating with the first hollow passage 521. The tunnel 550c defines a tunnel entrance 557 at the outer tube proximal end 510, and the tunnel 550c extends axially to the vicinity of the outer tube distal end 530 to define a closed tunnel end 559. The outer surface of the outer tube distal end 530 includes a rotation track 570, the rotation track 570 includes a transverse rotation wall 571 integrally connected with the outer tube wall 520 and a longitudinal rotation wall 573 connected thereto, and the transverse rotation wall 571 and the longitudinal rotation wall 573 constitute an approximately L-shaped rotation track.

The first tunnel side wall 551c comprises circumferential slits 580 therethrough, in one version the circumferential slits 580 comprise a plurality of circumferential through holes 581, the plurality of circumferential through holes 581 are evenly arranged in the first tunnel side wall 551c along the axial direction of the outer pipe, two adjacent circumferential through holes 581 define one ring beam 583. The circumferential through holes 581 have a width dimension P1 in the axial direction, and the distance between two adjacent circumferential through holes 581 is P2 (obtained by measuring the distance between the geometric centers of two adjacent circumferential through holes 581). Fig. 20 depicts the structure and composition of a rotary plug seal 60c, the rotary plug seal 60c comprising a rotary plug seal body 61c and a plurality of locking tooth seal holes 63c extending through the body, the plurality of locking tooth seal holes 63c being evenly distributed along the length of the rotary plug seal body.

Fig. 21-22 depict the assembled relationship of the hollow tube assembly 3 c. The inner conduit 600 is mounted within the outer conduit 500c with the inner conduit outer cylindrical surface 670 shaped and dimensioned to fit the first hollow channel 521 and the outer tab 640 to fit the tunnel channel 555 to limit rotational movement of the inner conduit 600 relative to the outer conduit 500c, the inner conduit 600 being axially movable relative to the outer conduit 500 c. The rotary plug seal 60c is mounted externally of the first tunnel side wall 551c with the latch tooth seal bore 63c generally aligned with the circumferential through bore 581. In one implementation, the rotating plug seal 60c is bonded to the exterior of the first tunnel side wall 551 c. A rotation bolt 700b is mounted on the outside of the first tunnel side wall 551, wherein the shape, size and positional relationship (pitch) of the locking teeth 720b match the circumferential through hole 581, said rotation bolt 700b being rotatable in the circumferential direction of the circumferential through hole 581 relative to the outer pipe 500 c. The locking tooth sealing hole 63c and the locking tooth 720b form a hermetic seal therebetween, preventing gas in the outer pipe from leaking through a fitting gap between the annular through hole 581 and the locking tooth.

The rotating bolt 700b includes an unlocked state and a locked state. In the locked state, the rotating bolt 700b is rotated toward the inside of the tunnel passage 555 so that the locking teeth 720b enter the tunnel passage; in the unlocked state, the rotating bolt 700 is rotated towards the outside of the tunnel passage 555 so that the locking teeth 720b exit the tunnel passage.

The hollow tube assembly 3c includes a fixed state and a movable state. In the fixed state, the rotating bolt 700b is in the locked state, and the outer protrusion 640 is restricted between two adjacent locking teeth 720b, so as to restrict the inner pipe from moving axially relative to the outer pipe. In the moving state, the rotating bolt 700b is in the unlocked state, and the inner pipe is axially movable relative to the outer pipe.

In yet another embodiment, the rotating bolt 700b includes m (m ≧ 3) locking teeth 720b, the m locking teeth 720b are substantially uniformly distributed along the length of the rotating bolt body 710 from the proximal end to the distal end, and the locking teeth 720b are the first, second … …, and mth locking tooth 720b in sequence. Two adjacent teeth define a slot 730b having a width dimension X1 along the length of the tumbler body 710 and a spacing X2. In figure 22, the spacing between the mth locking tooth and the tunnel end 559 of the hollow tube assembly 3c is equal to X1, and the inner conduit is restricted from axial movement relative to the outer conduit when the outer protrusion 640 is restricted between the mth locking tooth and the tunnel end 559. The length of the hollow tube assembly comprises m length settings; when the outer protrusion is matched with the first and second locking teeth, the length of the hollow tube assembly is Lt1, namely the initial length; when the outer lug is matched with the second third locking tooth, the length of the hollow tube assembly is Lt 2; by analogy, when the outer lug is matched with the (m-1) th locking tooth, the length of the hollow pipe assembly is Lt_m-1. The length of the hollow tube assembly when the outer protrusion is mated with the mth locking tooth, tunnel end 559, is Ltm. The inner pipe length of Ltm satisfies the following relationship:

Ltm＝Lt1+m*X2

The hollow tube assembly 3c further comprises a tube end seal 800 mounted on the distal end of the outer tube, said seal 800 being mounted on the outside of the outer tube cylindrical tail surface 540, wherein the proximal elastic ring 810 mates with the outer tube cylindrical tail surface 540 to form a gas tight seal and the distal elastic ring 830 mates with the inner tube cylindrical outer surface 670 to form a gas tight seal.

Replacement of the hollow tube assembly 3b in the puncture tube assembly 1b with the hollow tube assembly 3c results in a new puncture tube assembly 1c (not shown in the figure). Similarly, when the puncture tube assembly 1c is used in laparoscopic surgery, the operator can change the total length of the hollow tube assembly of the puncture tube assembly according to the thickness of the abdominal wall of the patient, the position and puncture angle of the puncture tube assembly, and the personal operation habit, etc., and further adjust the fixed depth of the puncture tube assembly on the abdominal wall, so that the external section (length H1), the body wall section (length H2) and the internal section (length H3) of the puncture tube assembly can be set ideally. The method of adjusting the length of the hollow tube assembly of the puncture tube assembly 1c is substantially the same as the aforementioned method of adjusting the length of the hollow tube assembly of the puncture tube assembly 1 c. Compared with the hollow pipe component 3b, the hollow pipe component 3c has better strength of the outer pipeline, the locking teeth 720b are more precise to match with the annular through hole 581, and the state switching is more convenient.

Those skilled in the art will readily appreciate that the spike assembly also requires a mating spike. The puncture needle penetrates through the puncture tube assembly to form a puncture outfit, then the puncture outfit and the puncture outfit penetrate through the abdominal wall through an incision arranged on the abdominal wall of a patient in advance to enter the body cavity, and then the puncture needle is taken away, and the inner pipeline is used as a passage for instruments to enter and exit the body cavity. The introducer needle generally includes a handle portion, a shaft portion and a distal portion. For example, CN201611125444.3 entitled "improved bladeless visual puncture needle" is incorporated herein by reference, which is the puncture needle disclosed in the chinese invention application filed on 12/9/2016. The puncture tube component formed by the telescopic bottom shell component can be contracted into the shortest length at the initial position, and then is matched with the improved knife-free visual puncture needle to form the puncture device for penetrating through the abdominal wall, and the outer pipeline and the inner pipeline are rotated relatively after the puncture needle is taken away, so that the fixed depth of the puncture tube component on the abdominal wall is adjusted, and the external section (length H1), the body wall section (length H2) and the internal section (length H3) of the puncture tube component are ideally arranged. A retractable puncture needle can also be designed to match the retractable puncture tube assembly.

Many different embodiments and examples of the invention have been shown and described. The individual embodiments each contain typically different distinguishing features, which can be interchanged or superimposed on one another. One of ordinary skill in the art can adapt the methods and apparatus described herein by making appropriate modifications without departing from the scope of the invention. Several modifications have been mentioned, and other modifications will occur to those skilled in the art. The scope of the invention should, therefore, be determined with reference to the appended claims, and not be construed as limited to the details of structure, materials, or acts shown and described in the specification and drawings.

Claims

1. A hollow tube assembly for a puncture instrument including a rotation plug, characterized in that:

1) comprises an outer pipeline, an inner pipeline and a rotating bolt;

2) the outer tube including an outer tube proximal end and an outer tube distal end and an outer tube wall extending therebetween, the outer tube wall defining a first hollow channel; the outer pipeline also comprises an axial tunnel arranged along the axial direction of the outer pipeline, the tunnel comprises a first tunnel side wall and a second tunnel side wall which are connected with the outer pipeline into a whole, and also comprises a tunnel top wall connected with the first tunnel side wall and the second tunnel side wall, and the first tunnel side wall, the second tunnel side wall and the tunnel top wall define a tunnel channel communicated with the first hollow channel; the tunnel extends to the adjacent area of the far end of the outer pipe along the axial direction to form a closed tunnel end;

3) the inner conduit comprises an inner conduit proximal end and an inner conduit distal end and an inner conduit wall extending therebetween, the inner conduit wall outer surface comprising an inner conduit outer cylindrical surface, the outer surface of the inner conduit proximal end comprising an outer bump; the inner pipeline is arranged in the outer pipeline, wherein the shape and the size of the outer cylindrical surface of the inner pipeline are matched with those of the first hollow channel, the outer lug is matched with the tunnel channel, the inner pipeline is limited to do rotary motion relative to the outer pipeline, and the inner pipeline can axially move relative to the outer pipeline;

4) the first tunnel side wall includes a circumferential chute communicating with the tunnel passage, the rotary bolt includes a latch having a shape and a size matching the circumferential chute, the rotary bolt is installed at an outer side of the first tunnel side wall, wherein the latch is inserted into the circumferential chute.

2. A hollow tube assembly as claimed in claim 1, wherein: the rotary bolt comprises an unlocking state and a locking state, and in the locking state, the rotary bolt rotates towards the interior of the tunnel channel so that the lock bolt enters the tunnel channel; in the unlocked state, the rotary bolt is rotated towards the exterior of the tunnel passage such that the latch exits the tunnel passage.

3. A hollow tube assembly as claimed in claim 2, wherein: the tunnel is characterized by further comprising a near-end plug, the shape and the size of the near-end plug are matched with those of the tunnel channel, and the near-end plug is installed at the near end of the tunnel.

4. The hollow tube assembly of claim 3, wherein the hollow tube assembly comprises a proximal fixation state, a mobile state, and a distal fixation state; in the proximal end fixing state, the rotating bolt is in a locking state, and the outer convex block is limited between the proximal end plug and the proximal end of the latch, so that the inner pipeline is limited to move axially relative to the outer pipeline; in the far end fixing state, the rotating bolt is in a locking state, and the outer convex block is limited between the end of the tunnel and the far end of the latch, so that the inner pipeline is limited to move axially relative to the outer pipeline; in the mobile state, the rotating bolt is in the unlocked state and the inner pipe can move axially relative to the outer pipe.

5. The hollow tube assembly of claim 4, wherein: the hollow tube assembly can be switched from a near-end fixed state to a moving state and then to a far-end fixed state; or the far-end fixed state can be switched to the moving state and then to the near-end fixed state.

6. The hollow tube assembly of claim 5, wherein: the outer surface of the outer tube distal end includes a rotation track, the rotation peg includes a rotation peg body that is mounted in the rotation track, and the rotation peg body is movable and rotatable in the rotation track.

7. The hollow tube assembly of claim 6, wherein: the first tunnel is provided with a first tunnel side wall, a first locking ring is arranged on the first tunnel side wall, and the first locking ring is provided with a first locking hole; and an air seal is formed between the latch sealing ring and the latch, so that the air in the outer pipeline is prevented from leaking through a fit clearance between the annular sliding groove and the latch.

8. The hollow tube assembly of claim 6, wherein: the hollow tube assembly further comprises a tube tail seal mounted at the distal end of the outer tube, the tube tail seal comprising a proximal elastic ring and a distal elastic ring; the far end of the outer pipe comprises an outer cylindrical surface at the tail of the outer pipe, and the sealing element is fixed outside the outer cylindrical surface at the tail of the outer pipe; the inner pipeline comprises an outer cylindrical surface of the inner pipeline, and the distal end elastic ring is matched with the outer cylindrical surface of the inner pipeline to form a seal.