CN107049441B - Puncture outfit with automatic reset lock catch - Google Patents

Abstract

The invention relates to a puncture outfit with an automatic reset lock catch, which comprises a puncture needle and a sleeve assembly, wherein the sleeve assembly comprises an instrument seal, a zero seal, a first fixing piece, a second fixing piece, a top shell, a lower shell and a hollow sleeve connected with the upper shell; the zero seal is clamped between the lower shell and the second firmware and is mutually fixed to form a zero seal assembly; the zero seal assembly further comprises a gas valve assembly mounted on the lower housing and in communication with the hollow sleeve; the sleeve assembly further includes a lock to selectively connect the instrument seal assembly and the zero seal assembly, the lock including a button that extends beyond an outer surface of the sleeve assembly defined by the top and lower housings; the sleeve assembly includes a front region, a left side region, a right side region, and a rear region, the buttons being disposed within the front region and not interfering with standard left-handed and right-handed gripping procedures.

Description

Puncture outfit with automatic reset lock catch

Technical Field

The invention relates to a minimally invasive surgical instrument, in particular to a puncture outfit structure.

Background

A puncture device is a surgical instrument used in minimally invasive surgery (especially hard endoscopic surgery) to create an artificial channel into a body cavity. The penetrator typically comprises a cannula assembly and a needle. The clinical general use mode is as follows: a small opening is firstly cut on the skin of a patient, then a puncture needle penetrates through the sleeve assembly, the distal end of the puncture needle exceeds the distal end of the sleeve assembly, and then the puncture needle penetrates through the body wall through the skin opening and enters the body cavity. The surgeon holds the puncture outfit and applies a large puncture operating force for overcoming the resistance to puncturing and cutting the tissue and the resistance to expanding and swelling the tissue. When the distal end of the needle and cannula assembly is entirely penetrating the patient's body wall, the resistance suddenly disappears, and the physician may not be able to stop the application of force or the distal end of the needle may accidentally damage the patient's internal tissue due to inertia. To reduce this risk of accidental trauma, numerous designers have made numerous innovative designs that create three broad categories of knife-protected lancets, knife-free lancets, and visible lancets. Various puncture needles have advantages and disadvantages, and surgeons often comprehensively consider and formulate a reasonable method for establishing a puncture channel and select the puncture needle matched with the puncture channel according to the type of the operation, the operation position and the condition of a patient.

In hard endoscopic surgery, a stable pneumoperitoneum is often created and maintained to obtain sufficient surgical space. The cannula assembly is typically comprised of a cannula, a housing, a sealing membrane (also known as an instrument seal) and a zero seal (also known as an auto seal). The cannula penetrates from outside the body cavity into the body cavity as a passageway for instruments to enter and exit the body cavity. The zero seal typically does not provide a seal to 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 when the instrument is inserted.

In the disclosed prior art sleeve assemblies, the instrument seal is typically coupled to the housing to form a first seal assembly, the zero seal is coupled to the sleeve to form a second seal assembly, and the first and second seal assemblies are coupled by a quick lock mechanism. The quick locking mechanism is convenient to assemble the first sealing component and the second sealing component together and automatically lock, and meanwhile, the quick locking mechanism can be released by one hand so as to split the first sealing component and the second sealing component. This design is typically intended to facilitate the removal of tissue from a patient during surgery. For example, after a tissue sample is obtained from a patient using an instrument during surgery, the first seal assembly is removed by releasing the quick-lock mechanism, and the sample is removed from the body with only a zero seal, without having to seal with the instrument. This makes it easier to remove the sample and less damaging to the sample.

The quick locking mechanism is realized in a plurality of modes: a spring-actuated rotary latch member to achieve a quick lock connection is disclosed in chinese patent application 200410092127.8 (entitled "rotary latch system for trocars") filed on 9/30 2004. In chinese invention application 201410072509.7 (entitled "improved puncture outfit") filed on 1/3/2014, the first and second sealing assemblies of the prior art are not tightly connected, resulting in leakage; and a scheme for realizing quick lock connection by the spring-driven horizontally-moving lock plug body is provided. Chinese invention application 201410335388.0 (entitled "minimally invasive puncture device") filed on 7/15 2014 discloses a spring-driven bi-directional releasable rotary locking member for quick-lock connection. There are many improvements disclosed for the quick lock connection between the first and second seal assemblies that are not described in detail for economy. While the search for simpler, more reliable, faster to operate quick lock mechanisms continues.

Disclosure of Invention

To solve one or more of the problems of the prior art, it is an object of the present invention to provide a puncture outfit comprising an automatic reset lock, comprising a puncture needle and a cannula assembly, wherein the cannula assembly comprises an instrument seal, a zero seal, a first fixing member, a second fixing member, a top housing, a lower housing and a hollow cannula connected with the same; the instrument seal is clamped between the top shell and the first fixing piece and mutually fixed to form an instrument seal assembly, and the zero seal is clamped between the lower shell and the second fixing piece and mutually fixed to form a zero seal assembly; the zero seal assembly further comprises a gas valve assembly mounted on the lower housing and in communication with the hollow sleeve; wherein: the sleeve assembly further includes a lock to selectively connect the instrument seal assembly and the zero seal assembly, the lock including a button that extends beyond an outer surface of the sleeve assembly defined by the top and lower housings; the sleeve assembly includes a front region, a left side region, a right side region, and a rear region, the buttons being disposed within the front region and not interfering with standard left-handed and right-handed gripping procedures.

Preferably, the button is generally axially aligned with the valve assembly.

Preferably, the lock is constrained between the lower housing and the second securing member in a clearance fit, the lock being movable in a transverse plane substantially perpendicular to the axis of the lower housing; the lock piece also comprises a lock piece frame and an elastic reset arm, wherein the button, the lock piece frame and the elastic reset arm are connected to form a single integral part and are made of plastic materials; the first fixing piece and the locking piece are matched with each other to form a first locking part, a second locking part and a third locking part, and the first locking part, the second locking part and the third locking part are matched with each other to fix the instrument sealing assembly and the zero sealing assembly together; applying unlocking external force to drive the button, and enabling the corresponding movement of the locking piece to unlock the first locking part, the second locking part and the third locking part, so that the instrument sealing assembly and the zero sealing assembly are separated from each other; and removing the unlocking external force, and driving the locking piece to reset by the elastic reset arm.

Preferably, the lock further comprises a transverse shaft passing through the button and being substantially perpendicular to the axial direction of the sleeve assembly; the locking piece comprises a first locking hook, a second locking hook and a third locking hook, wherein the first locking hook and the second locking hook are arranged at the near-end position of the locking piece frame along the transverse axis direction and are rigidly connected with the locking piece frame into a whole, and the third locking hook is arranged at the far-end position of the locking piece frame along the transverse axis direction and is connected with the locking piece frame into a whole through a flexible arm; the first firmware comprises a first lock catch, a second lock catch and a third lock catch, the first lock catch and the first lock hook are matched to form the first locking part, the second lock catch and the second lock hook are matched to form the second locking part, and the third lock catch and the third lock hook are matched to form the third locking part; and the unlocking external force is applied to drive the button to transversely move towards the direction in the sleeve assembly, the first lock hook and the second lock hook move in the same direction as the button to unlock, and the flexible arm elastically deforms and drives the third lock hook to move in the opposite direction to the button to unlock.

Preferably, the first firmware comprises a first lip, the second firmware comprises a second lip, and the first lip and the second lip are matched with each other to form a lip fit; the lip engagement primarily limits lateral movement of the instrument seal assembly and the zero seal assembly, while the first, second, and third locking portions primarily limit axial movement of the instrument seal assembly and the zero seal assembly.

Preferably, the first fastener comprises a lower annular wall in contact with the zero seal and forming an airtight seal at the contact location.

Drawings

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

FIG. 1 is a perspective view of a first embodiment of the puncture instrument according to the present invention;

FIG. 2 is an exploded view of the cannula assembly and the needle of the penetrator of FIG. 1;

FIG. 3 is a partial cross-sectional view of the sleeve assembly of FIG. 1;

FIG. 4 is an exploded view of the zero seal assembly of the sleeve assembly of FIG. 3;

FIG. 5 is a perspective view of the lock of the zero seal assembly shown in FIG. 4;

FIG. 6 is a schematic view of the lock assembly of the zero seal assembly of FIG. 4;

FIG. 7 is a schematic illustration of the assembled zero seal assembly of FIG. 4;

FIG. 8 is a schematic view of an instrument seal assembly of the cannula assembly of FIG. 3;

FIG. 9 is a partial cross-sectional view of the shackle and shackle mating portion of the sleeve assembly;

FIG. 10 is a schematic illustration of a latch in an initial state;

FIG. 11 is a schematic illustration of a latch in an unlocked state;

FIG. 12 is a schematic view of a zero seal assembly of another embodiment;

FIG. 13 is a schematic view of another embodiment instrument seal assembly;

FIG. 14 is a partial cross-sectional view of a sleeve assembly of another embodiment;

FIG. 15 is a partial cross-sectional view of a sleeve assembly of yet another embodiment;

FIG. 16 is a schematic view of an instrument seal assembly of the cannula assembly of FIG. 15;

FIG. 17 is an exploded view of the zero seal assembly of the sleeve assembly of FIG. 15;

FIG. 18 is a perspective view of the lock of the zero seal assembly of FIG. 17;

FIG. 19 is a reverse perspective view of the lock of FIG. 18;

FIG. 20 is a schematic view of the lock assembly of the zero seal assembly of FIG. 17;

FIG. 21 is a schematic view of the assembled zero seal assembly of FIG. 17;

FIG. 22 is a partial cross-sectional view of the shackle and shackle mating portion of the sleeve assembly of FIG. 15 in an unlocked state;

FIG. 23 is a partial cross-sectional view of the shackle and shackle mating portion of the sleeve assembly shown in FIG. 15;

FIG. 24 is an exploded view of a zero seal assembly of another embodiment;

FIG. 25 is a perspective view of the lock of the zero seal assembly of FIG. 24;

FIG. 26 is a reverse perspective view of the latch of FIG. 25;

FIG. 27 is a schematic view of the lock assembly of the zero seal assembly of FIG. 24;

FIG. 28 is an enlarged partial schematic view of FIG. 27;

FIG. 29 is a schematic view of the zero seal assembly of FIG. 27 in an unlocked condition;

FIG. 30 is an enlarged partial schematic view of FIG. 29;

FIG. 31 is a schematic view of a right hand grip of a prior art penetrator in clinical use;

FIG. 32 is a schematic view of a left hand grip during clinical use of a prior art penetrator;

FIG. 33 is a front projection view of thepenetrator 1000;

FIG. 34 is a left side projection view of thepenetrator 1000;

FIG. 35 is a proximal-to-distal projection of thepenetrator 1000;

FIG. 36 is a schematic view of a right hand grip of the present invention in clinical application;

FIG. 37 is a schematic view of a left hand grip of the present invention in clinical use;

throughout the drawings, like reference numerals designate identical 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 may 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 invention.

Referring to fig. 1-2, for convenience of description, the party closer to the operator is defined as the proximal end, and the party farther from the operator is defined as the distal end. The central axis defining thesleeve assembly 200 is referred to as thelongitudinal axis 10, the direction generally parallel to thelongitudinal axis 10 is referred to as the axial direction, the axis defining the button through thesleeve assembly 200 and generally perpendicular to thelongitudinal axis 10 is referred to as thetransverse axis 20, and the direction generally parallel to thetransverse axis 20 is referred to as the transverse direction.

Fig. 1-9 depict the overall structure and assembly of a first embodiment of the puncture instrument of the present invention. Fig. 1-3 depict the overall structure of thepenetrator 1000. Atypical penetrator 1000 includes aneedle 100 and acannula assembly 200.Cannula assembly 200 includesinstrument seal assembly 300 and zeroseal assembly 400. Theinstrument seal assembly 300 includes afirst fixture 310, atop cover 370 and a sealingmembrane assembly 320 sandwiched therebetween. Theseal assembly 400 includes abody 410, alock 430, a zeroseal 450, asecond firmware 470, and avalve assembly 490. It will be appreciated by those skilled in the art that it is important that theinstrument seal assembly 300 and the zeroseal assembly 400 remain securely connected and reliably sealed during insertion of thecannula assembly 200 into the abdominal wall, as well as during normal operation. However, it may be more convenient for the surgeon to remove theinstrument seal assembly 300 when taking a sample, such as when taking sample tissue from the abdominal cavity, so that the sample tissue passes through the zeroseal 450 only, rather than simultaneously passing through the zeroseal 450 and theseal membrane assembly 320. The mode can be used for taking out the sample more easily in the taking-out process, and meanwhile, the condition that the sample tissue is damaged due to extrusion is reduced.

The structure and composition of theinstrument seal assembly 300 is depicted in greater detail in fig. 3 and 8. Thefirst fastener 310 includes aplanar wall portion 311 and acentral hole 313 therethrough. Thefirst fastener 310 further includes a proximally extending upperannular wall 314 and anupper housing 315 connected to thewall portion 311, and a distally extending lowerannular wall 316 and afirst lip 317, theupper housing 315 and thefirst lip 317 being connected and smoothly transitioning. Thetop cover 370 comprises atop housing 371 and a throughhole 373 therethrough, thetop cover 370 further comprising a proximal flat 372 and an innerannular wall 374 extending distally from the interior of thetop housing 371. The sealstack film assembly 320 includes aseal film 330 and aprotective sheet 340, wherein theprotective sheet 340 may be secured to theseal film 330 by adhesive or other mechanical means, in this example, theprotective sheet 340 is embedded onto theseal film 330. The sealingmembrane 330 includes sealing membrane proximal 334 anddistal sealing aperture 338 and a sealing wall extending therebetween. The seal membraneproximal end 334 is secured between the upperannular wall 314 and the innerannular wall 374. Thefirst fixing member 310 and thetop cover 370 may be fixed in various manners, such as interference fit, ultrasonic welding, gluing, fastening, etc. The connection mode is shown in this embodiment, thetop case 371 and theupper case 315 are fixed by ultrasonic welding. This fixation places theproximal end 334 of the sealingmembrane assembly 320 in compression. Thecentral bore 313, the distal seal bore 338 and the throughbore 373 are substantially aligned to form a passageway for the ingress and egress of instruments.

The structure and composition of the zeroseal assembly 400 is depicted in greater detail in fig. 3 and 4. Thebody 410 includes anelongated tube 412, theelongated tube 412 including an opendistal end 419 and ahollow cannula 413 coupled to thebody housing 411 extending through thedistal end 419. Thedistal end 419 is defined by thecannula lip 414. Thebody 410 also includes aninner wall 426 supporting a zero seal and avalve mounting hole 427 in communication with the inner wall. Thevalve element 496 is mounted in thevalve body 492 to form avalve assembly 490 and is mounted together in the mountingbore 427.

Referring to fig. 5, thelock 430 includes alock frame 432, theframe 432 including a frameproximal face 433 and a frame distal face 434 (not shown), thelock frame 432 defining acentral throughbore 431. In this example, thelatch frame 432 is a planar, approximately annular, closed structure, however, one of ordinary skill will recognize that the latch frame may be comprised of other shaped ribs, beams or walls, or may be a non-closed structure. Thelock 430 further includes afirst return arm 437, asecond return arm 438 and abutton 436 integrally connected to theframe 432. Thelock 430 further includes a firstrigid latch hook 442 extending proximally, a secondrigid latch hook 444, and a thirdrigid latch hook 446, wherein thefirst latch hook 442 and thesecond latch hook 444 are disposed at a proximal location along thetransverse axis 20 of thelock frame 432 and are directly coupled to theframe 432, the coupling being rigid; and thethird latch hook 446 is disposed at a distal end of thelatch frame 432 in the direction of thetransverse axis 20 and is indirectly connected to theframe 432 by a firstflexible arm 447 and a secondflexible arm 448, which are flexible. The first, second, and third latch hooks 442 (444, 446) each include a lead-in slope, a locking plane, and a cantilever, the lead-in slopes of the first, second, and third latch hooks 442 (444, 446) each being longitudinally downward, the locking planes of the first and second latch hooks being oriented in a proximal direction along thetransverse axis 20, and the locking plane of thethird latch hook 446 being oriented in a distal direction along thetransverse axis 20.

Referring to fig. 4 and 7, thesecond fixture 470 includes aplanar wall portion 471 and acentral bore 473 therethrough, and further includes ahousing wall 472 coupled to thewall portion 471, a proximally extendingsecond lip 474 and a distally extending mountingpost 478. In this example, thesecond lip 474 includes acylindrical lip 474a and aflat lip 474b. Thesecond fastener 470 further includes a clearance throughhole 475 through thewall portion 471 and a clearance throughhole 476 through thesecond lip 474, the clearance throughhole 475 and clearance throughhole 476 being sized and positioned to accommodate the first, second, and third shackle of the lockingmember 430.

With continued reference to fig. 4-7, thebody 410 further includes a plurality of stop bars 422, a plurality of stop posts 423, a plurality of hollow fixedposts 428, and abutton mounting location 424. The zeroseal 450 includes aflange portion 456, a zeroseal wall 454 extending proximally from the flange, and adistally extending duckbill 453. Referring now to FIG. 6, the zeroseal 450 is mounted onto thebody 410 with theflange portion 456 in contact with theinner wall 426. With continued reference to fig. 6, the lockingmember 430 is mounted to thebody 410 with the distal face 434 of the lockingmember 430 mated with thestop bead 422; thebutton 436 mates with thebutton mount 424; the firstreset arm 437 and the secondreset arm 438 are in contact with the outside of the hollowstationary post 428 and in an initial compressed state; the firstflexible arm 447 and the secondflexible arm 448 are in contact with thelimiter post 423 and are in an initial compressed state. Referring now primarily to fig. 4 and 7, thesecond firmware 470 is secured with thebody 410. Thesecond fixing member 470 and themain body 410 may be fixed in various manners, such as interference fit, ultrasonic welding, adhesive bonding, and fastening. In this embodiment 4 mountingposts 478 have an interference fit with 4 hollow fixing posts 428. Theflange portion 456 of the zeroseal 450 is sandwiched between theinner wall 426 and thesecond fastener 470 and theflange 456 is in a compressed state. The lockingmember 430 is sandwiched between thespacing rib 422 and the second securingmember 470 in a clearance fit state, wherein the first, second and third locking hooks 442, 444 and 446 pass through the clearance through-holes 475 and 476 and protrude beyond thesecond lip 474, and thebutton 436 protrudes beyond themain body housing 411.

Referring to fig. 8, thefirst firmware 310 further includes afirst buckle 319a, asecond buckle 319b, and athird buckle 319c that are matched with the first, second, and third locking hooks of the lockingmember 430. Thefirst lip 317 includes acylindrical lip 317a and aflat lip 317b that match the shape and size of thesecond lip 474. Referring now to fig. 9, theinstrument seal assembly 300 and the zeroseal assembly 400 are coupled together to form thecannula assembly 200, wherein thefirst latch hook 442 and thefirst clasp 319a mate to form a first locking feature, thesecond latch hook 444 and thesecond clasp 319b mate to form a second locking feature, and thethird latch hook 446 and thethird clasp 319c mate to form a third locking feature. And theannular wall 316 contacts and forces the zeroseal wall 454 in a compressed state such that the connection area between the instrument channel defined by theinstrument seal assembly 300 and the instrument channel defined by the zeroseal assembly 400 forms an airtight seal. In one aspect, thefirst lip 317 and thesecond lip 474 mate with each other to form a lip fit; the lip engagement primarily limits lateral movement of the instrument seal assembly and the zero seal assembly, while the first, second, and third locking portions primarily limit axial movement of the instrument seal assembly and the zero seal assembly. Those skilled in the art will recognize that other limiting means may be employed to achieve similar functionality.

Fig. 10 depicts a morphology oflock 430 in an initial state or locked state. Fig. 11 depicts a morphology oflock 430 in a compressed or unlocked state. The locking action process is as follows: when theinstrument seal assembly 300 is snapped down toward the zeroseal assembly 400, thefirst catch 319a presses thefirst shackle 442 axially downwardLeading-inslope 443a to generate a component force F in a lateral direction (seen from the view angle of FIG. 11)₁ While thesecond latch 319b presses the lead-inslope 445a of thesecond latch hook 444 axially downward to generate a laterally upward force component F₂ The component force F₁ And component force F₂ Theentire lock frame 432 is driven laterally upward until the first andsecond shackle 442, 444 are concealed within thesecond lip 474. Thelock frame 432 is moved laterally upward as a whole so that the first and second returnarms 437 and 438 continue to compress and undergo a large elastic deformation; and the overall lateral upward movement of thelatch frame 432 reduces the spacing between thepost 423 and thelatch frame 432, compressing the first and secondflexible arms 447, 448 to displace thethird latch hook 446 laterally downward (as viewed in the perspective of fig. 11) until thethird latch hook 446 is concealed within thesecond lip 474. After the first, second andthird catches 319a, 319b, 319c are fully extended axially downward beyond the leading-in inclined surfaces of the first, second and third shackle, the force component F₁ And F₂ The first, second and second returnarms 437, 438, 447, 448 snap back to return such that the lockingplane 442b of thefirst latch hook 442 engages thefirst catch 319a, the lockingplane 444b of thesecond latch hook 444 engages thesecond catch 319b, and the lockingplane 446b of thethird latch hook 446 engages thethird catch 319 c. Thereby securing theinstrument seal assembly 300 and the zeroseal assembly 400 together (as shown in fig. 9).

The unlocking action process is as follows: with continued reference to fig. 9-11, when an unlocking force F is applied to thebutton 436 laterally upward (as viewed from the perspective of fig. 11)₃ Thelock frame 432 is driven to move laterally upward as a whole until the first andsecond shackle 442, 444 are concealed inside thesecond lip 474. Thelock frame 432 is moved laterally upward as a whole so that the first and second returnarms 437 and 438 continue to compress and undergo a large elastic deformation; and thelock frame 432 is moved upward and laterally integrally so that the stopper posts 423 and the lock frame432 is reduced, thereby compressing the firstflexible arms 447 and the secondflexible arms 448 such that thethird latch hook 446 is displaced laterally downward until thethird latch hook 446 is concealed within thesecond lip 474. At this time, the connection between thefirst latch 319a and thefirst latch hook 442 is disengaged, the connection between thesecond latch 319b and thesecond latch hook 444 is disengaged, and the connection between thethird latch 319c and thethird latch hook 446 is disengaged. So that theinstrument seal assembly 300 can be separated from the zeroseal assembly 400. Removing the unlocking force F₃ The first 437, second 438, first 447 and second 448 flexible arms spring back rapidly to drive thelatch 430 back.

In the prior art disclosed at present, a large number of locking parts or quick locking mechanisms for realizing quick connection and disconnection between an instrument sealing assembly and a zero sealing assembly are provided, wherein the quick locking mechanism mainly composed of movable locking parts (movable locking part mechanism for short) is convenient to disassemble and reassemble, and has wide application. Typical application cases include: rotary latching systems such as disclosed in US 8029475; bidirectionally unlockable rotary latch members such as disclosed in chinese patent No. 201410335388.0; double-return font locking schemes such as those disclosed in chinese invention 201310202250.9; such as the horizontally moving lock insert solution disclosed in chinese patent No. 201410072509.7, etc. The quick locking mechanism is convenient to disassemble and reassemble as much as possible and has small force for disassembly and reassembly on the premise of ensuring reliable connection so as to obtain better operation experience, and meanwhile, the production and manufacture of the quick locking mechanism are as simple as possible so as to save cost. The movable locking mechanisms disclosed so far generally have the common feature that they are mainly constituted by a spring-driven translational or rotational locking member, which usually comprises only two locking portions. It will be appreciated by those skilled in the art that the springs are limited to the structural features of the sleeve assembly itself, which typically need to be of a slim size, and even if they are of a slim construction, they typically require a relatively large installation space, resulting in significant limitations in the design and installation of other components (e.g., zero seals, movable locks or valve assemblies, etc.). Often a tiny spring complicates the assembly of the sleeve assembly and makes robotic automated assembly difficult. In addition, based on the related mechanical principle, the two limiting points can only limit translational movement but not rotational movement taking the two limiting points as axes, that is, the structure of the two locking portions is usually unstable, and the two locking portions must be compensated by increasing the locking contact area and increasing the locking force, so that the operation experience of disassembly or reassembly is poor.

It will be appreciated by those skilled in the art that the lock of the present invention comprises a single piece of plastic material with which the lock frame is integrally connected and the resilient return arm is formed, and that no additional spring drive is required, thereby saving installation space and simplifying assembly operations. At the same time, the lock and other parts can be designed more complex, since there is no need to leave a spring installation space. In this embodiment, thefirst fastener 310 and the lockingmember 430 cooperate to form a first locking portion, a second locking portion, and a third locking portion, the first, second, and third locking portions cooperating to secure the instrument seal assembly and the zero seal assembly together. The device has the advantages that the connection between the instrument sealing assembly and the zero sealing assembly is firmer and smoother, the locking force of the connection can be reduced, and the operation experience of disassembly or reassembly is better. The locking piece can be integrally formed in an injection molding mode, elastic parts such as springs are not required to be additionally arranged, and the number of parts and assembly procedures are effectively reduced. The injection molding plastic material includes, but is not limited to, polyamide (PA), polyamide+glass fiber, polycarbonate (PC), polymethyl methacrylate (PMMA), polypropylene (PP), cyclic Olefin Copolymer (COC), acrylonitrile-butadiene-styrene copolymer (ABS), etc.

Fig. 12-14 depict another implementation, thecannula assembly 200a includes aninstrument seal assembly 300a and a zeroseal assembly 400a. Thesleeve assembly 200a is substantially identical in construction and composition to thesleeve assembly 200, with the primary difference being the manner in which the interface between the instrument channel defined by the instrument seal assembly and the instrument channel defined by the zero seal assembly forms an airtight seal. In this embodiment, the zeroseal assembly 400a includes an upperannular lip 478a extending proximally, the upperannular lip 478a including a sealring securing slot 478b and further including apositioning aperture 478c; theinstrument seal assembly 300a includes a lowerannular lip 318a and a locatingpost 318c. Referring now to fig. 14, theinstrument seal assembly 300a and the zeroseal assembly 400a are coupled together, the locatingpost 318c mates with the locatinghole 478c, and thesealing ring 460a fits within the securingslot 478b between the upperannular lip 478a and the lowerannular lip 318a such that the interface between the instrument channel defined by theinstrument seal assembly 300a and the instrument channel defined by the zeroseal assembly 400a forms an airtight seal.

Fig. 15-20 depict asleeve assembly 500 according to a second embodiment of the present invention. Thesleeve assembly 500 includes aninstrument seal assembly 600 and a zeroseal assembly 700.

The structure and composition of theinstrument seal assembly 600 is depicted in fig. 15 and 16. Theinstrument seal assembly 600 includes afirst fastener 610, atop cover 370 and a sealingmembrane assembly 320 sandwiched therebetween. Thefirst fastener 610 includes aplanar wall portion 612 and acentral bore 618 therethrough. Thewall portion 612 includes a proximal face 611 and adistal face 613, and the upperannular wall 314 is integral with thewall portion 612 and extends proximally. Thefirst fastener 610 also includes anupper housing 315, theupper housing 315 being integral with and smoothly transitioning with thewall portion 612. The seal membraneproximal end 334 is secured between the upperannular wall 314 and the innerannular wall 374. Thetop case 371 is secured to theupper housing 315 by ultrasonic welding. This fixation places theproximal end 334 of the sealingmembrane assembly 320 in compression. Thecentral bore 618, the distal seal bore 338 and the throughbore 373 are substantially aligned to form a passageway for the ingress and egress of instruments. Thefirst fastener 610 further includes a firstlower extension arm 684, a secondlower extension arm 683, and a thirdlower extension arm 682. Each lower extension arm 684 (683, 682) includes a downwardly facingcam surface 684a (683 a,682 a) and alatch surface 684b (683 b,682 b), and the first, second, and third lower extension arms 684 (683, 682) are disposed in a triangular approximately uniform arrangement over thedistal face 613 of thefirst firmware 610.

The structure and composition of the zeroseal assembly 700 is depicted in fig. 15 and 17. Theseal assembly 700 includes abody 710, alock 760, a zeroseal 450, asecond firmware 770, and avalve assembly 490. Thebody 710 includes anelongated tube 412, theelongated tube 412 including an opendistal end 419 and ahollow cannula 413 coupled to thebody housing 411 extending through thedistal end 419. Thebody 410 also includes aninner wall 426 supporting a zero seal and avalve mounting hole 427 in communication with the inner wall. Thevalve element 496 is mounted in thevalve body 492 to form avalve assembly 490 and is mounted together in the mountingbore 427.

Referring to fig. 18-19, thelock 760 includes alock frame 761 and abutton 769 coupled thereto, thelock frame 761 defining acentral throughbore 768. Thelatch frame 761 includes afirst latching member 764, asecond latching member 763 and athird latching member 762. The first, second, third latching members 764 (763, 762) mate with the first, second, and third lower extension arms 684 (683, 682), respectively, of theinstrument seal cartridge 600. The first, second and third latching members 764 (763, 762) are triangularly arranged in correspondence with the first, second and third lower extension arms 684 (683, 682). Thelock 760 also includes atransverse shaft 20a passing through thebutton 769 and generally perpendicular to the axial direction of thesleeve assembly 500. More precisely, thefirst locking member 764 is disposed at a distal end position of thelock frame 761 along thetransverse axis 20a, and the second, third locking members (763, 762) are disposed at both sides of the proximal end position of thelock frame 761 along thetransverse axis 20a. The first, second and third latching members 764 (763, 762) each include a proximally facingcam surface 764a (763 a,762 a); likewise, the first, second and third latch members 764 (763, 762) include distally facing latch surfaces 764b (763 b,762 b) that are shaped and dimensioned to mate with the latch surfaces 684b (683 b,682 b) of the first, second and third lower extension arms 684 (683, 682). Thelock 760 also includes areset arm 766 integral with thelock frame 761. Thereturn arm 766 includes aresilient cantilever 766a and aresilient tip 766b, theresilient cantilever 766a being an elongated arm with good resilient capabilities. In one implementation, theresilient tip 766b includes a blunt or spherical surface to facilitate sliding back and forth along an axial fit on the outer surface of theinner wall 426. Thelock frame 761 also includes aguide slot 765, theguide slot 765 including a guide slotproximal end 765a and a guide slotdistal end 765b.

Referring to fig. 17, thesecond retainer 770 includes aplanar wall portion 771 and acentral bore 773 therethrough, and further includes ahousing wall 772 coupled to thewall portion 771 and a distally extending mountingpost 778. Thesecond firmware 770 further includes a clearance throughhole 775 extending through thewall portion 771, the clearance throughhole 775 being sized and positioned to accommodate the first, second and third lower extension arms 684 (683, 682).

Referring to fig. 15, 17, 20 and 21, themain body 710 further includes a plurality of hollow fixingposts 721, a plurality oflimit ribs 722,2positioning posts 723 and abutton mounting position 724. Referring now to FIG. 15, the zeroseal 450 is mounted onto thebody 710 with theflange portion 456 in contact with theinner wall 426. Referring now to fig. 19-20, thelock 760 is mounted to thebody 710 with thelock frame 761 sandwiched between thestop bar 722 and thewall portion 771; thebutton 769 mates with thebutton mount 724; thepositioning column 723 is matched with theguide groove 765; thereturn arm 766 is in contact with theinner wall 426 and is in a pre-compressed state. Referring now to fig. 20, an interference fit of 4 mountingposts 778 with 4 hollow fixing posts 721 secures thesecond firmware 770 with thebody 710. Theflange portion 456 of the zeroseal 450 is sandwiched between theinner wall 426 and thesecond retainer 770 and theflange 456 is in a compressed state. Thelock 760 is sandwiched between thestop bar 722 and thesecond fastener 770 and is in a clearance fit.

The locking action process is as follows: referring to fig. 20 and 22, when theinstrument seal assembly 600 is axially snapped down toward the zeroseal assembly 700, first the cam surfaces 684a (683 a,682 a) press against the cam surfaces 764a (763 a,762 a) to generate a force component F that is directed laterally upward (as viewed from the perspective of fig. 20)₅ The component force F₅ Continuing to compress thereturn arm 766 laterally upward to a greater elastic deformation and driving thelock frame 761 laterally upward until the cam surfaces 684a (683 a,682 a) clear the cam surfaces 764a (763 a,762 a) and disengage from one another, whereupon the separation F₅ And vanishes. Theguide groove 765 and the positioning column 723The engagement is such that the latch frame can only move laterally upward or laterally downward without rotation. Referring now to FIG. 23, when the separation F₅ Upon removal, thereturn arm 766 resiliently returns to drive thelatch frame 761 laterally downward until the latch surfaces 684b (683 b,682 b) engage the latch surfaces 764b (763 b,762 b) to secure theinstrument seal assembly 600 and zeroseal assembly 700 together. The zeroseal wall 454 passes through thecentral bore 618 and is in an interference fit to seal the contact area.

The unlocking action process is as follows: with continued reference to fig. 20-23, a laterally upward unlocking force F is applied to thebutton 769₆ Thelatch frame 761 is actuated to move generally laterally upward (as viewed in the perspective of fig. 20) until the latch surfaces 684b (683 b,682 b) disengage from the latch surfaces 764b (763 b,762 b). So that theinstrument seal assembly 600 can be separated from the zeroseal assembly 700. Thelock frame 761 moves upward and downward integrally to force thereturn arm 766 to compress and deform more elastically when the external force F is removed₆ Thereturn arm 766 then springs back rapidly to actuate the return of thelock 760.

The advantages and benefits achieved by this embodiment are substantially the same as those achieved by the first embodiment, and it should be noted that thereturn arm 766 of thelock 760 of this embodiment is disposed axially, thereby saving valuable lateral space, while being simpler in construction and more advantageous to manufacture.

Fig. 24-30 depict in detail another implementation of a zeroseal assembly 700a. The zeroseal assembly 700a is substantially identical in structure and composition to theseal assembly 700, with only the structure of the lock being different. Referring to fig. 23, theseal assembly 700a includes abody 710, alock 860, a zeroseal 450, asecond firmware 770, and avalve assembly 490. In this example, thebody 710 further includes two stop posts 726.

Referring to fig. 25-26, the lockingmember 860 is a generally U-shaped fork structure including abutton 868 and first and second lockingarms 867, 869 that are generally symmetrically disposed on opposite sides of thebutton 868. Thelatch 860 includes afirst latching member 864, asecond latching member 863 and athird latching member 862. The first, second, third latch members 864 (863, 862) mate with the first, second, and third lower extension arms 684 (683, 682), respectively, of theinstrument seal cartridge 600. The first, second and third latch members 864 (863, 862) are arranged in a triangular configuration corresponding to the first, second and third lower extension arms 684 (683, 682). The first, second and third latching members 864 (863, 862) each include a proximally facingcam surface 864a (863 a,862 a); likewise, the first, second and third latch members 864 (863, 862) include distally facing latch surfaces 864b (863 b,862 b) shaped and dimensioned to mate with the latch surfaces 684b (683 b,682 b) of the first, second and third lower extension arms 684 (683, 682). The lockingelement 860 further includes areturn arm 866, thereturn arm 866 including aresilient cantilever 866a and aresilient tip 866b, theresilient cantilever 866a being an elongate arm having good resilient capabilities. The lockingelement 860 also includes aguide slot 865, theguide slot 865 including a guide slotproximal end 865a and a guide slotdistal end 865b. Thefirst lock arm 867 further includes afirst cam portion 867a and a firstresilient portion 867b; thesecond lock arm 869 also includes asecond cam portion 869a and a secondresilient portion 869b.

Referring now to fig. 27-30, thelock 860 is mounted to thebody 710, sandwiched between thestop bar 722 and thewall portion 771; thebutton 868 mates with thebutton mount 724; thepositioning column 723 is matched with theguide groove 865; thereturn arms 866 are in contact with theinner wall 426 and are in a pre-compressed state. Referring now to the interference fit of 21,4 mountingposts 778 with 4 hollow fixing posts 721, thesecond retainer 770 is fixed with thebody 710. Theflange portion 456 of the zeroseal 450 is sandwiched between theinner wall 426 and thesecond retainer 770 and theflange 456 is in a compressed state. Thelock 860 is sandwiched between thestop bar 722 and thesecond fastener 770 in a clearance fit.

During the locking action, referring to fig. 22, when theinstrument seal assembly 600 is axially snapped downward toward the zeroseal assembly 700a, thecam surface 684a first presses against thecam surface 864a to displace the lockingmember 860 laterally upward and to elastically deform thereturn arm 866 more. At the same time, thecam surface 682a presses against thecam surface 862a, forcing theresilient portion 867b to resiliently deform so as to bias thefirst locking arm 867 laterally outwardly (as indicated by the arrow in fig. 30); also, thecam surface 683a presses against thecam surface 863a, forcing theresilient portion 869b to resiliently deform, causing thefirst locking arm 869 to deflect laterally outwardly. When the cam surfaces 684a (683 a,682 a) fully clear the cam surfaces 764a (763 a,762 a), thereturn arms 866 resiliently return, theresilient portions 867b resiliently return, and theresilient portions 869b resiliently return such that the latch surfaces 684b (683 b,682 b) engage the latch surfaces 764b (763 b,762 b) to secure theinstrument seal assembly 600 and zeroseal assembly 700a together.

During the unlocking action, when a transverse upward unlocking force F is applied to thebutton 769₇ Actuating thelatch 860 as a whole laterally upward (as viewed from the perspective of fig. 29) until thelatch surface 684b disengages from thelatch surface 764 b; simultaneously, the lockingmember 860 is moved generally laterally upward and thestop post 726 presses against thecam portion 867a andcam portion 869a, causing theresilient portion 867b to resiliently deform to force thefirst locking arm 867 laterally outward, as well as causing theresilient portion 867b to resiliently deform to force thefirst locking arm 867 laterally outward until the latch surfaces 683b,682b disengage from the latch surfaces 763b,762b, thereby allowing theinstrument seal assembly 600 to be separated from the zeroseal assembly 700 a. When the unlocking force F7 is removed, thereturn arm 866 is elastically returned, and theelastic portion 867b is elastically returned and theelastic portion 869b is elastically returned so that theentire lock 860 is completely returned.

The advantages and benefits achieved by this embodiment are substantially the same as those achieved by the second embodiment, and it should be noted that this embodiment has a greater automatic return of the lockingmember 860 than the second embodiment due to the second, third locking member 863 (862) being offset laterally outwardly to store energy in said first and second lockingarms 867, 869.

In another aspect of the present invention, a puncture outfit is provided having a contoured design for facilitating gripping operations. More generally, the buttons are disposed on the sleeve assembly while not interfering with the right-hand and left-hand grip areas. As discussed in the background, when a physician holds a needle penetrating the abdominal wall of a patient, the distal end of the needle may accidentally damage tissue inside the patient. Therefore, the ergonomics of the puncture outfit model are important, the puncture outfit model is designed to be convenient for a doctor to hold, and particularly, the puncture outfit model is well matched with various hand shapes and various holding methods, thereby being beneficial to improving the control capability of the doctor when carrying out puncture operation on the holding puncture outfit and reducing the risk of accidental injury. In order to better control the puncturing process, the technique of holding the puncture outfit during the abdominal wall puncture in the operation has been standardized and immobilized so far. Fig. 31-32 depict one of the most common techniques for holding a puncture outfit currently in use. Fig. 31-32 depict the gripping procedure by way of example of apuncture instrument 1000a (illustrated as a 12mm gauge XCEL puncture instrument) that has been mass produced and sold under the trade name "XCEL" as disclosed in US patent 8029475. Thepenetrator 1000a includes aneedle 100a and acannula assembly 200a. Thesleeve assembly 200a includes an instrument seal assembly and a zero seal assembly and a rotational locking system that selectively connects the two together. Thesleeve assembly 200a is first defined as having a front side and a rear side opposite the front side of thevalve assembly 106, and left and right side sides (as viewed in fig. 31). The rotational locking system comprises apush button 107 protruding from the left side to the outside of the casing assembly housing.

As shown in fig. 31, theright hand 110R holds thepuncture outfit 1000a, the palm center of the right hand is tightly attached to the back of the puncture outfit, themiddle finger 103 is buckled at the junction of the sleeve of the puncture outfit and the lower casing, and the junction of the palm and the wrist is tightly attached to the top of the puncture outfit, so that the force can be conveniently applied. Meanwhile, thethumb 105 is attached to the intersection area of the left side surface and the front surface of the puncture outfit, and thering finger 102 and thelittle finger 101 are attached to the right side surface of the puncture outfit, so that the puncture outfit is controlled at the palm center. And theindex finger 104 abuts against the cannula of the puncture outfit to control the direction of puncture and to help control the depth of penetration of the puncture outfit through the abdominal wall, thereby preventing accidents. The standard method of holding thepuncture instrument 1000a by a right-handed physician illustrated in fig. 31 is that the protrudingbutton 107 is just in the space between thumb and index finger, which is a good or near perfect operating experience.

Fig. 32 shows a standard procedure for a left-handed physician to grasp thepuncture instrument 1000a, and the grasping posture or procedure is difficult to change due to the presence of theair valve assembly 106, and the grasping procedure is substantially the same as that of fig. 31. Theleft hand 110L holds thepuncture outfit 1000a, the left palm center is clung to the back of the puncture outfit, themiddle finger 103 is buckled at the junction of the sleeve of the puncture outfit and the lower shell, and the junction of the palm and the wrist is clung to the top of the puncture outfit, so that the force is conveniently applied. Meanwhile, thethumb 105 is attached to the intersection area of the right side surface and the front surface of the puncture outfit, and thering finger 102 and thelittle finger 101 are attached to the left side surface of the puncture outfit, so that the puncture outfit is controlled at the palm center. And theindex finger 104 abuts against the cannula of the puncture outfit to control the direction of puncture and to help control the depth of penetration of the puncture outfit through the abdominal wall, thereby preventing accidents. The standard method of holding thepuncture instrument 1000a by a left-handed physician illustrated in fig. 31, the protrudingbutton 107 interferes with the holding position of thering finger 102 or thelittle finger 101, and the operation experience is not perfect or poor.

In the prior art disclosed at present, a plurality of quick locking mechanisms for realizing quick connection and disconnection between an instrument sealing assembly and a zero sealing assembly are arranged, wherein the quick locking mechanism mainly composed of movable locking pieces (the movable locking piece mechanism for short) is convenient to disassemble and reassemble, and is widely applied. The presently disclosed cannula assemblies having a movable locking mechanism typically have its unlocking button disposed in the left-hand region of the cannula assembly, which is well suited for right-handed surgeon handling, but not for left-handed surgeon handling. According to incomplete statistics, people who use left hands in China account for about 8-12% of the general population, the proportion of left hands used in Europe and America is relatively higher, and the proportion of left hands used by doctor groups is higher than that of the general public. However, in the field of medical device design, many medical devices, such as forceps, tweezers, scissors, etc., are designed and manufactured according to the right hand habit, and it is sometimes very inconvenient for a left-handed doctor to use these medical devices. So far, many designers have generally ignored the need for a left-handed doctor.

In addition, locating thebutton 107 on the side of thecannula assembly 200a presents other problems. For example, when thesleeve assembly 200a is secured to the patient's abdominal wall, typically the back of the sleeve assembly is proximate the patient's skin and thevalve assembly 106 faces away from the skin, such that the corners of thevalve assembly 106 are prevented from damaging the patient's skin; and because operation at different angles is often required in the operation, the sleeve assembly is often caused to deflect to a certain extent, so that the left side surface or the right side surface of the sleeve assembly is close to the skin of a patient, and the condition that the sleeve assembly is integrally overturned to the front surface of the sleeve assembly to contact the skin of the patient is rare. Thebutton 107 is disposed on the left side of the cannula assembly, and when the cannula assembly is deflected to the left side to contact the patient's skin, thebutton 107 presses the patient's skin for an extended period of time, which may cause a bruise or other damage.

Fig. 33-35 depict an improved button setup method. The sleeve set 200 is defined to have afront region 210 on one side of thevalve assembly 490, arear region 270 on the opposite side of the front region, and left andright regions 230 and 250 on both sides. Referring to fig. 35, in greater detail, a first datum plane a is defined through the geometric center of thevalve assembly 490 and theaxis 10, a second datum plane B is defined through theaxis 10 at an angle of 45 ° to the first datum plane a, and a third datum plane C is defined through theaxis 10 that is symmetrical to the second datum plane B with respect to the first datum plane a. The second datum surface B and the third datum surface C intersect the housing of theferrule assembly 200 to divide the housing of theferrule assembly 200 into 4 substantially equally divided regions, namely thefront region 210, theleft region 230, theright region 250 and therear region 270 described above. Thebutton 436 is disposed in thefront region 210 on the upper side of the valve assembly 490 (i.e., closer to the proximal end relative to the valve assembly 490). Thebutton 436 may be axially aligned with thevalve assembly 490 and then in some cases, both may be disposed axially out of alignment to allow for ease of opening and closing the valve assembly and pressing the button. More precisely, thebuttons 436 are provided in reasonable locations in the front area that do not interfere with the standard left-handed and right-handed gripping methods.

Figs. 36-37 illustrate standard right-handed and left-handed grips, respectively, of thepenetrator 1000 of the present invention. As shown in fig. 36, thepuncture outfit 1000 is held by theright hand 110R, the palm center of the right hand is closely attached to the rear of the puncture outfit, themiddle finger 103 is buckled at the junction of the sleeve and the lower casing of the puncture outfit, and the junction of the palm and the wrist is closely attached to the top of the puncture outfit, so that the force can be conveniently applied. Meanwhile, thethumb 105 is attached to the intersection area of the left side surface and the front surface of the puncture outfit, and thering finger 102 and thelittle finger 101 are attached to the right side surface of the puncture outfit, so that the puncture outfit is controlled at the palm center. And theindex finger 104 abuts against the cannula of the puncture outfit to control the direction of puncture and to help control the depth of penetration of the puncture outfit through the abdominal wall, thereby preventing accidents. As shown in fig. 37, theleft hand 110L holds thepuncture outfit 1000, the left palm center is tightly attached to the back of the puncture outfit, themiddle finger 103 is buckled at the junction of the sleeve and the lower shell of the puncture outfit, and the junction of the palm and the wrist is tightly attached to the top of the puncture outfit, so that the force can be conveniently applied. Meanwhile, thethumb 105 is attached to the intersection area of the left side surface and the front surface of the puncture outfit, and thering finger 102 and thelittle finger 101 are attached to the right side surface of the puncture outfit, so that the puncture outfit is controlled at the palm center. And theindex finger 104 abuts against the cannula of the puncture outfit to control the direction of puncture and to help control the depth of penetration of the puncture outfit through the abdominal wall, thereby preventing accidents. It is apparent that thebuttons 436 are positioned so as not to interfere with the standard left-handed and right-handed gripping methods.

Many different embodiments and examples of the invention have been shown and described. One of ordinary skill in the art will be able to make adaptations to the method and apparatus by appropriate modifications without departing from the scope of the invention. Such as the snap lock mechanism disclosed in other inventions, with slight adaptations, the button arrangement area of the present invention may be employed. Several modifications have been mentioned, and other modifications are conceivable to the person skilled in the art. The scope of the present invention should therefore be determined with reference to the appended claims, rather than with reference to the structures, materials, or acts illustrated and described in the specification and drawings.

Claims (4)

1. A puncture outfit comprising an automatic reset lock catch, comprising a puncture needle and a sleeve assembly, wherein the sleeve assembly comprises an instrument seal, a zero seal, a first fixing piece, a second fixing piece, a top shell, a lower shell and a hollow sleeve connected with the lower shell; the instrument seal is clamped between the top shell and the first fixing piece and mutually fixed to form an instrument seal assembly, and the zero seal is clamped between the lower shell and the second fixing piece and mutually fixed to form a zero seal assembly; the zero seal assembly further comprises a gas valve assembly mounted on the lower housing and in communication with the hollow sleeve; the method is characterized in that:

1) The sleeve assembly further includes a lock to selectively connect the instrument seal assembly and the zero seal assembly, the lock including a button that extends beyond an outer surface of the sleeve assembly defined by the top and lower housings;

2) The sleeve assembly includes a front region, a left side region, a right side region and a rear region, the buttons being disposed within the front region and not interfering with standard left-handed and right-handed gripping procedures; the button is generally axially aligned with the valve assembly;

3) The lock being limited between the lower housing and the second fastener in a clearance fit, the lock being movable in a transverse plane substantially perpendicular to the axis of the lower housing;

4) The lock piece also comprises a lock piece frame and an elastic reset arm, wherein the button, the lock piece frame and the elastic reset arm are connected to form a single integral part and are made of plastic materials;

5) The first fixing piece and the locking piece are matched with each other to form a first locking part, a second locking part and a third locking part, and the first locking part, the second locking part and the third locking part are matched with each other to fix the instrument sealing assembly and the zero sealing assembly together;

6) Applying unlocking external force to drive the button, and enabling the corresponding movement of the locking piece to unlock the first locking part, the second locking part and the third locking part, so that the instrument sealing assembly and the zero sealing assembly are separated from each other; removing the unlocking external force, and driving the lock to reset by the elastic reset arm; the lock further includes a transverse shaft passing through the button and generally perpendicular to the axial direction of the sleeve assembly;

7) The locking piece comprises a first locking hook, a second locking hook and a third locking hook, wherein the first locking hook and the second locking hook are arranged at the near-end position of the locking piece frame along the transverse axis direction and are rigidly connected with the locking piece frame into a whole, and the third locking hook is arranged at the far-end position of the locking piece frame along the transverse axis direction and is connected with the locking piece frame into a whole through a flexible arm;

8) The first firmware comprises a first lock catch, a second lock catch and a third lock catch, the first lock catch and the first lock hook are matched to form the first locking part, the second lock catch and the second lock hook are matched to form the second locking part, and the third lock catch and the third lock hook are matched to form the third locking part;

9) And the unlocking external force is applied to drive the button to transversely move towards the direction in the sleeve assembly, the first lock hook and the second lock hook move in the same direction as the button to unlock, and the flexible arm elastically deforms and drives the third lock hook to move in the opposite direction to the button to unlock.

2. The puncture device according to claim 1, wherein: the first firmware comprises a first lip, the second firmware comprises a second lip, and the first lip and the second lip are matched with each other to form a lip fit.

3. The puncture device according to claim 2, wherein: the lip engagement primarily limits lateral movement of the instrument seal assembly and the zero seal assembly, while the first, second, and third locking portions primarily limit axial movement of the instrument seal assembly and the zero seal assembly.

4. The puncture device according to claim 1, wherein: the first fastener includes a lower annular wall that is in contact with the zero seal and forms an airtight seal at the contact location.

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