CN111887955B - Elongated tube assembly containing lever lock for minimally invasive surgery - Google Patents
Elongated tube assembly containing lever lock for minimally invasive surgery Download PDFInfo
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- CN111887955B CN111887955B CN202010825797.4A CN202010825797A CN111887955B CN 111887955 B CN111887955 B CN 111887955B CN 202010825797 A CN202010825797 A CN 202010825797A CN 111887955 B CN111887955 B CN 111887955B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3415—Trocars; Puncturing needles for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
- A61B17/3439—Cannulas with means for changing the inner diameter of the cannula, e.g. expandable
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3474—Insufflating needles, e.g. Veress needles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3494—Trocars; Puncturing needles with safety means for protection against accidental cutting or pricking, e.g. limiting insertion depth, pressure sensors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
- A61B17/3439—Cannulas with means for changing the inner diameter of the cannula, e.g. expandable
- A61B2017/3441—Cannulas with means for changing the inner diameter of the cannula, e.g. expandable with distal sealing means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
- A61B2017/3443—Cannulas with means for adjusting the length of a cannula
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B2017/347—Locking means, e.g. for locking instrument in cannula
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- General Health & Medical Sciences (AREA)
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- Gastroenterology & Hepatology (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses a slender tube component containing a lever lock for minimally invasive surgery, which comprises a static tube, a moving tube and a lever lock, wherein the static tube is provided with a first end and a second end; the static tube comprises a static tube proximal end, a static tube distal end and a static tube wall extending therebetween, the appearance of the static tube wall comprises a first rib and a second rib, the first rib and the second rib extend from the static tube distal end to the static tube proximal end, the first rib comprises a first transverse hole, and the second rib comprises a second transverse hole; the lever lock includes a proximal lever end and a distal lever end and a lever arm extending therebetween, the lever arm including a first pivot and a second pivot; the lever lock is arranged between a first rib and a second rib of the static pipe, wherein the first rotating shaft is matched with the first transverse hole, the second rotating shaft is matched with the second transverse hole, and the lever lock can rotate around the first rotating shaft and the second rotating shaft; the tube comprises a tube proximal end and a tube distal end and a tube wall extending therebetween, and the lever distal end comprises locking teeth that mate with the outer ring teeth.
Description
Technical Field
The present invention relates to minimally invasive surgical instruments and, more particularly, to an elongated tube assembly including a lever lock for use in minimally invasive surgery.
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 cannula assembly and a needle. 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 cannula 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 cannula assembly as a passage for the instrument 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. Cannula assemblies typically consist 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 cannula assembly penetrates from outside the body cavity to inside the body cavity to serve as a passage for instruments to and from 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 cannula assembly is secured to the abdominal wall of a patient, the hollow cannula may be divided into an extracorporeal section (length H1), a body wall section (length H2) and an intracorporeal 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 external section of the body cannot be reserved too long or too short, which is inconvenient for inserting the instruments, especially when the cannula assembly is used as a main operation hole and needs to be repeatedly switched, the length H1 of the external section of the body is too short, which is inconvenient for operating the instruments 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 pipe of the sleeve pipe 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, an elongated tube assembly including a lever lock for use in minimally invasive surgery is provided, including a static tube, a moving tube, and a lever lock. The static tube comprises a static tube proximal end, a static tube distal end and a static tube wall extending therebetween, the exterior of the static tube wall comprises a first rib and a second rib extending from the static tube distal end to the static tube proximal end, the first rib comprises a first transverse hole, and the second rib comprises a second transverse hole. The lever lock includes a proximal lever end and a distal lever end and a lever arm extending therebetween, the lever arm including a first pivot and a second pivot; the lever lock is installed between the first muscle and the second muscle of quiet pipe, wherein first pivot and first horizontal hole match, the second pivot matches with the horizontal hole of second, the lever lock can be around first, the second pivot is rotatory. Said moving tube comprising a proximal moving tube end and a distal moving tube end and a moving tube wall extending therebetween, said moving tube being mounted within said static tube for axial movement relative thereto; the outer surface of the movable pipe wall comprises a plurality of axially and uniformly distributed outer ring teeth, and the far end of the lever comprises locking teeth matched with the outer ring teeth.
In one arrangement, a locked state and an unlocked state are included; in the locked state, the lever lock locks the moving pipe and limits the moving pipe to axially move relative to the static pipe; in the unlocked state, the moving pipe can move axially relative to the static pipe.
In another embodiment, in the locked state, the lever lock rotates clockwise around the first and second rotating shafts until the lock teeth engage with any one of the outer ring teeth, and the lever arm contacts with the static tube to limit the distal end of the moving tube to move to the proximal end; in the unlocking state, the lever lock rotates around the first rotating shaft and the second rotating shaft anticlockwise until the lock teeth are completely separated from the outer ring teeth, and then the moving pipe can axially move relative to the static pipe.
In yet another aspect, the elongate shaft assembly further includes a tension mechanism that limits counterclockwise rotation of the lever lock about the first and second axes of rotation to limit proximal to distal movement of the tube.
In another embodiment, the tension mechanism comprises an invaginated pit arranged in the middle of the lever arm and a spring plate arranged in the invaginated pit, and the spring plate is in a compressed state and generates thrust for the lever arm to enable the lever lock to rotate clockwise around the first rotating shaft and the second rotating shaft so as to limit the movement of the moving pipe from the proximal end to the distal end.
In another scheme, the tension mechanism comprises a first sliding chute arranged at the proximal end of the first rib, a second sliding chute arranged at the proximal end of the second rib and a sliding block arranged in the first sliding chute and the second sliding chute; the lever proximal end comprises a lever pushing surface and a lever locking surface;
the sliding block comprises a sliding block pushing surface and a sliding block locking surface; the slide block can move between a near end stroke end point and a far end stroke end point along the first sliding chute and the second sliding chute; in the locked state, the slide block moves to the far end stroke end point, the slide block locking surface is contacted with the rod locking surface, so that the lever lock is limited to rotate anticlockwise around the first rotating shaft and the second rotating shaft, and the moving pipe is limited to move from the near end to the far end.
In another scheme, when the sliding block moves from the far end stroke end point to the near end stroke end point, the sliding block locking surface and the lever locking surface are separated from each other, the lever lock can rotate anticlockwise around the first rotating shaft and the second rotating shaft until the locking teeth are completely separated from the outer ring teeth, and the slender shaft assembly is switched from the locking state to the unlocking state; the slider is pushed to the far end from the near end again, the slider pushing surface interacts with the lever pushing surface to force the lever lock to rotate clockwise until the lock tooth is meshed with the outer ring tooth, and the lever lock is continuously moved until the slider locking surface contacts with the lever locking surface, so that the lever lock is limited to rotate anticlockwise around the first rotating shaft and the second rotating shaft, and then the movable pipe is limited to move from the near end to the far end, and the unlocking state is switched to the locking state.
In yet another aspect, a cannula assembly is provided, comprising an elongate tube assembly as described in any of the preceding aspects, and further comprising a seal assembly, wherein a proximal end of the elongate tube assembly is coupled to and forms a gas seal with a distal end of the seal assembly.
In one aspect of the invention, an elongated tube assembly for a cannula assembly is provided, comprising a stationary tube, a rotating cartridge, and a traveling bolt. The static tube comprises a static tube proximal end, a static tube distal end and a static tube wall extending therebetween, the exterior of the static tube wall comprises a first rib and a second rib extending from the static tube distal end to the static tube proximal end, the first rib comprises a first transverse hole, and the second rib comprises a second transverse hole. The rotary clamping block comprises a far-end clamping head, a near-end clamping tail and a clamping block body extending between the far-end clamping head and the near-end clamping tail, and two sides of the clamping block body respectively comprise a first rotating shaft and a second rotating shaft; the rotary clamping block is arranged between a first rib and a second rib of the static pipe, wherein the first rotating shaft is matched with the first transverse hole, the second rotating shaft is matched with the second transverse hole, and the rotary clamping block can rotate around the first rotating shaft and the second rotating shaft. The movable bolt comprises a proximal buckle handle, a distal bolt head and a bolt body extending between the proximal buckle handle and the distal bolt head; the movable bolt is arranged between the first rib and the second rib, and the bolt head is arranged between the near-end clamping tail and the wall of the static pipe; and when the movable bolt is pushed, the bolt head can push the proximal end clamping tail to move or limit the proximal end clamping tail to move.
In one embodiment, the first tendon proximal end comprises a first runner, and the second tendon proximal end comprises a second runner; the proximal buckle comprises a first side lug and a second side lug, the first side lug is matched with the first sliding groove, and the second side lug is matched with the second sliding groove; the movable bolt can slide axially along the first sliding groove and the second sliding groove.
In yet another aspect, the elongate tube assembly further comprises a moving tube comprising a proximal moving tube end and a distal moving tube end with a moving tube wall extending therebetween, the moving tube being mounted within the interior of the static tube for axial movement relative to the static tube; the outer surface of the movable pipe wall comprises a plurality of axially and uniformly distributed outer ring teeth, and the far-end chuck comprises clamping teeth matched with the outer ring teeth.
In yet another aspect, a locked state and an unlocked state are included; in the locking state, any outer ring tooth and the latch are meshed with each other, and the movable bolt locks the rotary latch so that the outer ring tooth and the latch cannot be separated, so that the movable pipe is limited to move axially relative to the static pipe; under the unlocking state, the rotary clamping block can rotate to completely separate from the outer ring gear and the clamping gear, and the moving pipe can axially move relative to the static pipe.
In yet another aspect, the proximal latch tail comprises a first pushing surface and a first locking surface; the bolt head comprises a second pushing surface and a second locking surface; the pushing movable bolt moves from the near end to the far end, the second pushing surface pushes the first pushing surface to force the rotating fixture block to rotate clockwise around the first rotating shaft and the second rotating shaft until the far end chuck is contacted with the wall of the static pipe, and the second locking surface is matched with the first locking surface so as to lock the rotating fixture block.
In another embodiment, the moving bolt is pushed to move from the far end to the near end until the second locking surface and the first locking surface are completely disengaged, the rotating fixture block can rotate anticlockwise around the first rotating shaft and the second rotating shaft until the outer ring tooth and the fixture tooth are completely disengaged, and the moving pipe can move axially relative to the static pipe.
In another scheme, the device further comprises an elastic belt arranged outside the static tube and the proximal clamping tail, wherein the elastic belt is in a stretching state and applies hoop tightening force to the proximal clamping tail; when the second locking surface and the first locking surface are completely separated, the elastic band forces the rotating clamping block to rotate around the first locking surface and the second rotating shaft anticlockwise until the outer ring gear and the clamping tooth are completely separated.
In another scheme, the device further comprises a sealing ring, wherein the sealing ring is fixed outside the proximal end of the moving pipe, and the sealing ring is in contact with the inner wall of the static pipe to form air seal between the proximal end of the moving pipe and the static pipe.
In yet another aspect, a cannula assembly is provided, comprising an elongate tube assembly as described in any of the preceding aspects, and further comprising a seal assembly, wherein a proximal end of the elongate tube assembly is coupled to and forms a gas seal with a distal end of the seal assembly. .
In one aspect of the invention, a sleeve assembly comprising a static tube and a moving tube is provided, comprising a seal assembly and an elongated tube assembly; the seal assembly comprises a first seal assembly and a second seal assembly; the second seal comprises a second seal cartridge comprising a cartridge body proximal end and a cartridge body distal end and a wall portion extending therebetween, the elongated tube assembly comprising a static tube, a dynamic tube, a rotational cartridge and a travel pin. The static tube comprises a static tube proximal end, a static tube distal end and a static tube wall extending therebetween, the exterior of the static tube wall comprises a first rib and a second rib extending from the static tube distal end to the static tube proximal end, the first rib comprises a first transverse hole, and the second rib comprises a second transverse hole. The rotary clamping block comprises a far-end clamping head, a near-end clamping tail and a clamping block body extending between the far-end clamping head and the near-end clamping tail, and two sides of the clamping block body respectively comprise a first rotating shaft and a second rotating shaft; the rotary clamping block is arranged between a first rib and a second rib of the static pipe, wherein the first rotating shaft is matched with the first transverse hole, the second rotating shaft is matched with the second transverse hole, and the rotary clamping block can rotate around the first rotating shaft and the second rotating shaft. The dynamic tube includes a proximal and distal dynamic tube end and a dynamic tube wall extending therebetween, the dynamic tube being mounted within the static tube for axial movement relative thereto. The movable bolt comprises a proximal buckle handle, a distal bolt head and a bolt body extending between the proximal buckle handle and the distal bolt head; the movable bolt is arranged between the first rib and the second rib; and when the movable bolt is pushed, the bolt head can push the proximal end clamping tail to move or limit the proximal end clamping tail to move. In one scheme, the outer surface of the movable pipe wall comprises a plurality of axially and uniformly distributed outer ring teeth, and the far-end chuck comprises clamping teeth matched with the outer ring teeth.
In still another scheme, the height Hd1 of the outer ring teeth is more than or equal to 0.3mm and less than or equal to Hd1 and less than or equal to 0.5 mm.
In yet another aspect, a locked state and an unlocked state are included; in the locking state, any outer ring tooth and the latch are meshed with each other, and the movable bolt locks the rotary latch so that the outer ring tooth and the latch cannot be separated, so that the movable pipe is limited to move axially relative to the static pipe; under the unlocking state, the rotary clamping block can rotate to completely separate from the outer ring gear and the clamping gear, and the moving pipe can axially move relative to the static pipe.
In yet another aspect, the proximal latch tail comprises a first pushing surface and a first locking surface; the bolt head comprises a second pushing surface and a second locking surface; the pushing movable bolt moves from the near end to the far end, the second pushing surface pushes the first pushing surface to force the rotating fixture block to rotate clockwise around the first rotating shaft and the second rotating shaft until the far end chuck is contacted with the wall of the static pipe, and the second locking surface is matched with the first locking surface so as to lock the rotating fixture block.
In another embodiment, the moving bolt is pushed to move from the far end to the near end until the second locking surface and the first locking surface are completely disengaged, the rotating fixture block can rotate anticlockwise around the first rotating shaft and the second rotating shaft until the outer ring tooth and the fixture tooth are completely disengaged, and the moving pipe can move axially relative to the static pipe.
In another scheme, the device further comprises an elastic belt arranged outside the static tube and the proximal clamping tail, wherein the elastic belt is in a stretching state and applies hoop tightening force to the proximal clamping tail; when the second locking surface and the first locking surface are completely separated, the elastic band forces the rotating clamping block to rotate around the first locking surface and the second rotating shaft anticlockwise until the outer ring gear and the clamping tooth are completely separated.
In another scheme, the device further comprises a sealing ring, wherein the sealing ring is fixed outside the proximal end of the moving pipe, and the sealing ring is in contact with the inner wall of the static pipe to form air seal between the proximal end of the moving pipe and the static pipe.
In another aspect, a method for adjusting a length of an elongated tube assembly of a cannula assembly is provided, comprising the steps of:
s1: moving the movable bolt from the far end to the near end to enable the sliding block locking surface and the rod locking surface to be separated from each other, enabling the rotating buckle to rotate around the first rotating shaft and the second rotating shaft anticlockwise until the locking teeth and the outer ring teeth are completely separated, and enabling the slender shaft assembly to be switched from a locking state to an unlocking state;
s2: moving the moving pipe axially to make the moving pipe and the static pipe generate relative axial displacement, thereby adjusting the length of the elongated pipe assembly to a proper position;
s3: and the moving bolt is pushed from the near end to the far end to enable the rotating fixture block to rotate clockwise around the first rotating shaft and the second rotating shaft until the locking teeth are meshed with the outer ring teeth, and meanwhile, the second locking surface is matched with the first locking surface, so that the rotating fixture block is locked, and the unlocking state is switched into the locking state.
In one aspect of the present invention, a cannula assembly is provided comprising a seal assembly and an elongated tube assembly; the seal assembly comprises 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 proximal end of the elongated tube assembly is connected to and forms a seal with the distal end of the cartridge body. Comprises a static pipe, a moving pipe and a lever lock. The static tube comprises a static tube proximal end, a static tube distal end and a static tube wall extending therebetween, the exterior of the static tube wall comprises a first rib and a second rib extending from the static tube distal end to the static tube proximal end, the first rib comprises a first transverse hole, and the second rib comprises a second transverse hole. The lever lock includes a proximal lever end and a distal lever end and a lever arm extending therebetween, the lever arm including a first pivot and a second pivot; the lever lock is installed between the first muscle and the second muscle of quiet pipe, wherein first pivot and first horizontal hole match, the second pivot matches with the horizontal hole of second, the lever lock can be around first, the second pivot is rotatory. Said moving tube comprising a proximal moving tube end and a distal moving tube end and a moving tube wall extending therebetween, said moving tube being mounted within said static tube for axial movement relative thereto; the outer surface of the movable pipe wall comprises a plurality of axially and uniformly distributed outer ring teeth, and the far end of the lever comprises locking teeth matched with the outer ring teeth. In one arrangement, a locked state and an unlocked state are included; in the locked state, the lever lock locks the moving pipe and limits the moving pipe to axially move relative to the static pipe; in the unlocked state, the moving pipe can move axially relative to the static pipe.
In another embodiment, in the locked state, the lever lock rotates clockwise around the first and second rotating shafts until the lock teeth engage with any one of the outer ring teeth, and the lever arm contacts with the static tube to limit the distal end of the moving tube to move to the proximal end; in the unlocking state, the lever lock rotates around the first rotating shaft and the second rotating shaft anticlockwise until the lock teeth are completely separated from the outer ring teeth, and then the moving pipe can axially move relative to the static pipe.
In another embodiment, the tension mechanism comprises an invagination pit arranged in the middle of the lever arm and a spring plate arranged in the invagination pit, and the spring plate is in a compressed state and generates thrust for the lever arm to enable the lever lock to rotate clockwise around the first rotating shaft and the second rotating shaft so as to limit the movement of the moving pipe from the proximal end to the distal end.
In another embodiment, the tension mechanism comprises an invaginated pit arranged in the middle of the lever arm and a spring plate arranged in the invaginated pit, and the spring plate is in a compressed state and generates thrust for the lever arm to enable the lever lock to rotate clockwise around the first rotating shaft and the second rotating shaft so as to limit the movement of the moving pipe from the proximal end to the distal end.
In another scheme, the device further comprises a sealing ring, wherein the sealing ring is fixed outside the proximal end of the moving pipe, and the sealing ring is in contact with the inner wall of the static pipe to form air seal between the proximal end of the moving pipe and the static pipe.
In yet another aspect: the height Hd1 of the outer ring teeth is more than or equal to 0.3mm and less than or equal to Hd1 and less than or equal to 0.5mm
In another aspect, a method for adjusting the length of an elongated tube assembly of a cannula assembly is provided, comprising the steps of:
s1: applying external force to press the near end of the lever, so that the lever lock rotates around the first rotating shaft and the second rotating shaft anticlockwise until the locking teeth are completely separated from the outer ring teeth; switching the elongate tube assembly from the locked state to the unlocked state;
s2: maintaining an external force applied to the proximal end of the lever while axially moving the moving tube into axial relative displacement with the stationary tube, thereby adjusting the length of the elongated tube assembly to a desired position;
s3: and removing the external force and matching with slight axial movement of the moving pipe to enable the locking teeth and the outer ring teeth to be mutually meshed, so that the elongated pipe assembly is switched from the unlocking state to the locking state.
In one aspect of the invention, a puncture instrument is provided that includes a cannula assembly and a puncture needle extending through the cannula 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 an exploded view of elongated tube assembly 3;
FIG. 4 is a perspective view of the stationary tube 300;
FIG. 5 is a perspective view of the lever lock 500;
figure 6 is a side view of elongate tube assembly 3;
FIG. 7 is a cross-sectional view taken from 7-7 of FIG. 6;
FIG. 8 is an unlocked state schematic of the cross-sectional view of FIG. 7;
FIG. 9 is an enlarged view of 9-9 of FIG. 7;
FIG. 10 is an enlarged view of 10-10 of FIG. 8;
FIG. 11 is a perspective view of the cannula assembly 1;
fig. 12 is a perspective view of the rotary latch 500 a;
FIG. 13 is a perspective view of the travel bar 600;
figure 14 is a side view of the elongate tube assembly 3 a;
FIG. 15 is a cross-sectional view of 15-15 of FIG. 14;
FIG. 16 is a schematic view of the locked state of the cross-sectional view of FIG. 15;
FIG. 17 is a perspective view of the cannula assembly 1 a;
FIG. 18 is a perspective view of the modified lower capsule 230;
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.
Fig. 1-13 depict a cannula assembly 1 for laparoscopic surgery. The cannula assembly 1 includes a seal assembly 2 and an elongate tube assembly 3. Fig. 1-2 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 262 of the component 200 and the locking hook 112 of the component 100 are matched and fastened. The hook 112 and the slot 262 are matched to be quickly disassembled 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, a threaded connection or other quick-locking structure can be adopted. Alternatively, the assembly 100 and the assembly 200 may be designed in a configuration that is not quickly detachable.
1-2, the first seal assembly 100 comprises a first seal housing 110, a first seal cartridge 190 and an instrument seal assembly 180 sandwiched therebetween. The housing wall 191 of the first seal cartridge 190 is secured to the housing wall 111 of the first seal mount 110 by ultrasonic welding, such that the proximal end 181 of the instrument seal assembly 180 forms an air tight seal with the perimeter of the first seal mount.
1-2, the second seal assembly 200 comprises a second seal cartridge 230, a second seal housing 260 and a zero seal 250 sandwiched therebetween. 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 further comprises an inner wall 236 and an air valve mounting hole 237 communicating with the inner wall. The valve spool 280 is mounted in the valve body 270 and together in the mounting hole 237. The flange 256 of the zero seal 250 is sandwiched between the inner wall 236 and the second seal housing 260, and the 4 mounting posts 268 of the second seal housing 260 in this embodiment are in interference fit with the 4 mounting holes 238 (not shown) of the second cartridge 230, such that the flange 256 forms an air tight seal with the inner wall 236. In this embodiment, the zero seal 250 includes a single slit duckbill 253, which duckbill 253 opens when an external instrument is passed through the zero seal 250, and which duckbill 253 automatically closes when the instrument is removed.
Fig. 4-7 depict the structure and composition of elongate tube assembly 3, which elongate tube assembly 3 includes a still tube 300, a moving tube 400, and a lever lock 500. Fig. 4 depicts the structure and composition of the still pipe 300. The static tube 300 includes a static tube proximal end 310 and a static tube distal end 330 with a static tube wall 320 extending therebetween. The static tube wall 320 defines a first hollow passage 321. The exterior of the static tube wall 320 comprises a first rib 340 and a second rib 350 extending from the far end of the static tube to the near end thereof, and the far end 330 of the static tube comprises a limit notch 331 between the first rib 340 and the second rib 350. The first rib 340 includes a first transverse hole 341, and the second rib 350 includes a second transverse hole 351. In an alternative arrangement, the proximal end of the first rib 340 includes a first runner 349 and the proximal end of the second rib 350 includes a second runner 359.
As shown in figure 3, the tube 400 comprises a proximal tube end 410 and a distal tube end 430 with a tube wall 420 extending therebetween. The inner surface of the flow tube wall defines a second hollow passageway 421 and the distal flow tube end 430 defines an open tube lip 431. The outer surface of the tube wall 420 comprises a plurality of external ring teeth 440, the plurality of external ring teeth 440 are evenly distributed along the axial direction on the outer surface of the tube wall, the plurality of external ring teeth 440 form a non-slip region 460, and the non-slip region 460 extends from the outer surface of the tube proximal end 410 to the tube distal end 430. In an alternative embodiment, the distance Dx between the non-slip region 460 and the distal tube end 30 is 20mm or less and Dx or less and 30mm or less. Each of the outer ring teeth 440 includes an outer ring tip 441 and an outer ring root 449 (see fig. 9).
As shown in fig. 5, the lever lock 500 includes a lever proximal end 510 and a lever distal end 530 with a lever arm 520 extending therebetween. The lever distal end 530 includes a locking arm 531 and a locking tooth 533, and both sides of the lever arm 520 include a first pivot 540 and a second pivot 550, respectively. In an alternative, the lever arm 520 also includes an inwardly recessed dimple 521. In an alternative arrangement, the lever proximal end 510 includes a lever pushing surface 511 and a lever locking surface 513.
Figures 6-10 depict the assembled relationship of elongate tube assembly 3. The moving tube 400 is mounted inside the static tube 300 with the outer circumference of the moving tube wall 420 sized and shaped to match the first hollow passageway 321, and is axially movable relative to the static tube. The lever lock 500 is installed between the first rib 340 and the second rib 350 of the stationary pipe 300, wherein the first rotating shaft 540 is matched with the first transverse hole 341, the second rotating shaft 540 is matched with the second transverse hole 351, and the lever lock 500 can rotate around the first rotating shaft and the second rotating shaft.
The elongated tube assembly 3 comprises a locked state and an unlocked state. In the locked state, the lever lock locks the moving pipe and limits the moving pipe to axially move relative to the static pipe; in the unlocked state, the moving pipe can move axially relative to the static pipe. In more detail, referring to fig. 7 and 9, in the locked state, the lever lock rotates clockwise (as viewed in fig. 7) about the first and second axes until the locking tooth 533 engages with any one of the external ring teeth 440, and the locking arm 531 contacts the stationary tube to restrict the distal movement of the moving tube to the proximal movement. The elongate shaft assembly 3 further includes a tension mechanism that limits counterclockwise rotation (as viewed in FIG. 7) of the lever lock about the first and second axes of rotation, thereby limiting proximal to distal movement of the tube.
The tension mechanism can be implemented in a variety of ways, and fig. 7 depicts a spring tension mechanism comprising a spring 60. The spring 60 is mounted in a recessed pocket 521 in the lever arm 520 and contacts the wall of the stationary tube, and the spring 60 is compressed to generate a pushing force on the lever arm 520 to rotate the lever lock clockwise (as viewed in fig. 7) about the first and second axes of rotation, thereby restricting the movement of the tube from the proximal end to the distal end. Fig. 7 also depicts another slider tension mechanism comprising a slider 50. The slide 50 includes a slide pushing surface 51, a slide locking surface 53 and side rails 59 (not shown). The slide 50 is mounted between the stationary tube and the lever lock with the side slide rails 59 mating with and movable along first 349 and second 359 runners between a proximal end of travel and a distal end of travel. In the locked state, the slider 50 is moved to the end of its distal travel, and the slider locking surface 53 contacts the lever locking surface 513, thereby limiting counterclockwise rotation of the lever lock about the first and second axes of rotation (as viewed in FIG. 7), and thus limiting proximal to distal movement of the tube.
Referring to fig. 8 and 10, in the unlocked state, the lever lock is rotated counterclockwise (in the view of fig. 8) about the first and second axes of rotation until the lock teeth 533 are completely disengaged from the outer ring teeth 440, and the moving tube is axially movable relative to the stationary tube. When the elastic piece tension mechanism is adopted, external force is applied to overcome the elastic piece tension, the lever lock is forced to rotate around the first rotating shaft and the second rotating shaft anticlockwise until the locking teeth 533 and the outer ring teeth 440 are completely separated, and the slender shaft assembly is switched from the locking state to the unlocking state. When external force is removed, the elastic sheet recovers to force the lever lock to rotate clockwise around the first rotating shaft and the second rotating shaft until the locking tooth 533 is meshed with any one of the outer ring teeth 440, and the locking arm 531 is contacted with the static tube so as to limit the distal end of the moving tube to move towards the proximal end, and the unlocking state is switched to the locking state.
When the slider tensioning mechanism is adopted, when the slider 50 is moved from the distal end of travel to the proximal end of travel, the slider locking surface 53 and the lever locking surface 513 are disengaged from each other, and the lever lock can rotate counterclockwise around the first and second rotating shafts until the locking teeth 533 and the outer ring teeth 440 are completely disengaged, so that the slender shaft assembly is switched from the locked state to the unlocked state. The slider 50 is pushed from the proximal end to the distal end again, the slider pushing surface 51 interacts with the lever pushing surface 511, so that the lever lock is forced to rotate clockwise around the first and second rotating shafts until the locking tooth 533 and the outer ring tooth 440 are engaged with each other, and the lever lock continues to move until the slider locking surface 53 contacts the lever locking surface 513, so that the lever lock is limited to rotate counterclockwise around the first and second rotating shafts, and the movement of the moving tube from the proximal end to the distal end is further limited, and the unlocking state is switched to the locking state.
As shown in figure 7, the elongate tube assembly 3 further comprises a sealing ring 40, wherein the sealing ring 40 is affixed to the exterior of the proximal tubing end 410, either by glue or by interference fit with the proximal tubing end 410 by virtue of the elastic deformability of the sealing ring 40 itself. The sealing ring 40 contacts the inner wall of the stationary tube 300 to make the proximal end 410 of the movable tube airtight with the stationary tube 300.
As shown in fig. 13, the cannula assembly 1 comprises a seal assembly 2 and an elongate tube assembly 3, the proximal end of the elongate tube assembly 3 being connected to the distal end of the seal assembly 2 and forming a gas tight seal. The second sealing assembly 200 comprises a second sealing cartridge 230, wherein the shape and size of the distal end 234 of the second sealing cartridge 230 match with the proximal end 310 of the static tube, and the distal end 234 of the second sealing cartridge is connected with the proximal end 310 of the static tube to form an airtight seal. In one scheme, the far end 234 of the bin body is firmly connected with the near end 310 of the static tube by a glue bonding method to form an airtight seal; another method employs an interference fit to securely couple and form an air tight seal between the distal cartridge body end 234 and the proximal stationary tube end 310. In addition to the above-listed methods, the method of attaching the sealing assembly 2 to the elongated tubular assembly 3 can include a variety of means. For example, a sealing ring is added on the outside of the tube head of the static tube 300, and the static tube head and the far end of the bin body are firmly connected and form an air-tight seal through a common snap connection or a threaded connection.
In one design, the height Hd1 of the outer ring gear 440 is equal to the shortest distance between the tooth crest and the tooth root, wherein 0.3mm Hd1 mm 0.5mm, when Hd1 is smaller than 0.3mm, the outer ring gear is difficult to manufacture, and the depth of engagement between the outer ring gear and the elastically deformed locking gear 533 is too shallow, and the friction force of the outer ring gear wrapping the wound on the abdominal wall of the patient is insufficient; when Hd1 is larger than 0.5mm, the outer diameter of the tube needs to be increased to ensure sufficient strength, so that the puncture wound is damaged, and when the outer ring teeth are wrapped on the abdominal wall wound of the patient, the outer ring teeth with height of more than 0.5 tend to cause additional damage to the wound.
It will be appreciated by those skilled in the art that when cannula assembly 1 is used in laparoscopic surgery, the surgeon may vary the overall length of the elongated tube assembly of the cannula assembly and adjust the fixed depth of the cannula assembly in the abdominal wall based on the thickness of the patient's abdominal wall, the position and angle of penetration of the cannula assembly, and the individual handling habits, etc., so that the desired placement of the cannula assembly external section (length H1), the body wall section (length H2), and the internal section (length H3) is achieved.
The length adjusting method of the slender pipe assembly of the sleeve pipe assembly adopting the elastic tension mechanism or the sliding block tension mechanism is different. A method for adjusting the length of an elongated tube assembly of a sleeve assembly using a spring tension mechanism comprises the following steps:
s1: applying external force to press the near end of the lever, so that the lever lock rotates around the first rotating shaft and the second rotating shaft anticlockwise until the locking teeth are completely separated from the outer ring teeth; switching the elongate tube assembly from the locked state to the unlocked state;
s2: maintaining an external force applied to the proximal end of the lever while axially moving the moving tube into axial relative displacement with the stationary tube, thereby adjusting the length of the elongated tube assembly to a desired position;
s3: and removing the external force and matching with slight axial movement of the moving pipe to enable the locking teeth and the outer ring teeth to be mutually meshed, so that the elongated pipe assembly is switched from the unlocking state to the locking state.
A method for adjusting the length of an elongated tube assembly of a sleeve assembly using a slider tension mechanism comprises the steps of:
s1: the slide block is moved from the far end stroke end point to the near end stroke end point, so that the slide block locking surface and the lever locking surface are separated from each other, the lever lock can rotate around the first rotating shaft and the second rotating shaft anticlockwise until the locking teeth are completely separated from the outer ring teeth, and the slender shaft assembly is switched from the locking state to the unlocking state;
s2: moving the moving pipe axially to make the moving pipe and the static pipe generate relative axial displacement, thereby adjusting the length of the elongated pipe assembly to a proper position;
s3: the slide block is pushed from the near end to the far end, so that the lever lock winds the first rotating shaft and the second rotating shaft rotate clockwise until the lock teeth are meshed with the outer ring teeth, and the lever lock continues to move until the slide block locking surface contacts with the lever locking surface, so that the lever lock is limited to rotate anticlockwise around the first rotating shaft and the second rotating shaft, and the unlocking state is switched to the locking state.
Figures 12-17 depict yet another elongate tube assembly 3 a. The elongated tube assembly 3a includes a static tube 300, a moving tube 400, a rotational latch 500a and a travel pin 600. As shown in fig. 12, the rotary latch 500a includes a distal latch 530a and a proximal latch tail 510, and a latch body 520a extending therebetween, and both sides of the latch body 520a include a first rotation shaft 540a and a second rotation shaft 550a, respectively. The distal chuck 530a includes laterally extending latch teeth 533 a. The proximal catch 510a includes a first pushing surface 511a and a first locking surface 513 a. As shown in fig. 13, the travel bolt 600 includes a proximal buckle 610 and a distal bolt head 630 with a bolt body 620 extending therebetween. The stud head 630 includes a second pushing surface 631 and a second locking surface 633. The proximal clasp 610 includes a first side ear 611 and a second side ear 623.
Figures 14-16 depict the assembled relationship of the elongate tube assembly 3 a. The moving pipe 400 is installed inside the static pipe 300, and is axially movable with respect to the static pipe. The rotating latch 500a is installed between the first rib 340 and the second rib 350 of the stationary pipe 300, wherein the first rotating shaft 540a is matched with the first transverse hole 341, the second rotating shaft 540a is matched with the second transverse hole 351, and the rotating latch 500a can rotate around the first and second rotating shafts. The moving bolt 600 is installed between the first rib 340 and the second rib 350, and the bolt head 630 is disposed between the proximal snap tail 510a and the wall of the static tube; when the moving bolt 600 is pushed, the bolt head 630 can push the proximal clip tail 510a to move or limit the movement of the proximal clip tail 510 a.
As shown in fig. 15, the elongate tube assembly 3a comprises a locked state and an unlocked state; in the locking state, any outer ring tooth and the latch tooth are mutually meshed, and the movable bolt locks the rotary latch so that the outer ring tooth and the latch tooth cannot be separated, thereby limiting the axial movement of the movable pipe relative to the static pipe; under the unlocking state, the rotary clamping block can rotate to completely separate from the outer ring gear and the clamping gear, and the moving pipe can axially move relative to the static pipe. As shown in fig. 15 to 16, when the moving bolt 600 moves from the proximal end to the distal end, the second pushing surface 631 pushes the first pushing surface 511a to force the rotary latch 500a to rotate clockwise about the first and second rotation axes until the distal end chuck 530a contacts the stationary pipe wall 320, and the second locking surface 633 and the first locking surface 513a are matched, thereby locking the rotary latch 500 a.
As shown in fig. 15, when the moving bolt 500a is pushed to move from the distal end to the proximal end until the second locking surface 633 and the first locking surface 513a are completely disengaged, the rotary latch 500a can rotate counterclockwise around the first and second rotation axes until the outer ring teeth 440 and the latch teeth 533a are completely disengaged, and the moving tube 400 can move axially relative to the stationary tube 300. 14-15, in one design, the elongate tube assembly 3a further includes an elastic band 80 mounted externally to the static tube 300 and the proximal clip tail 510a, the elastic band being in tension and applying hoop tension to the proximal clip tail; when the second locking surface and the first locking surface are completely separated, the elastic band forces the rotating clamping block to rotate around the first locking surface and the second rotating shaft anticlockwise until the outer ring gear and the clamping tooth are completely separated. As shown in fig. 15, the elongate tube assembly 3 further comprises a sealing ring 40, wherein the sealing ring 40 is affixed to the exterior of the tube proximal end 410, either by glue or by interference fit with the tube proximal end 410 by virtue of the elastic deformability of the sealing ring 40 itself. The sealing ring 40 contacts the inner wall of the stationary tube 300 to make the proximal end 410 of the movable tube airtight with the stationary tube 300.
Referring to fig. 17, the cannula assembly 1a includes a seal assembly 2 and an elongate tube assembly 3a, the proximal end of the elongate tube assembly 3a being connected to and forming a gas tight seal with the distal end of the seal assembly 2. The second sealing assembly 200 comprises a second sealing cartridge 230, wherein the shape and size of the distal end 234 of the second sealing cartridge 230 match with the proximal end 310 of the static tube, and the distal end 234 of the second sealing cartridge is connected with the proximal end 310 of the static tube to form an airtight seal.
It will be appreciated by those skilled in the art that when cannula assembly 1a is used in laparoscopic surgery, the surgeon may vary the overall length of the elongated tube assembly of the cannula assembly and adjust the fixed depth of the cannula assembly in the abdominal wall according to the thickness of the abdominal wall of the patient, the position and angle of penetration of the cannula assembly, and the individual handling habits, etc., so as to achieve the desired arrangement of the external portion (length H1), the internal portion (length H2) and the internal portion (length H3) of the cannula assembly. Cannula assembly 1a may be formed with smaller, more elaborate, and space-saving elongated tube assemblies than cannula assembly 1.
The method for adjusting the length of the elongated tube assembly of the sleeve assembly 1a comprises the steps of:
s1: moving the movable bolt from the far end to the near end to enable the sliding block locking surface and the rod locking surface to be separated from each other, enabling the rotating buckle to rotate around the first rotating shaft and the second rotating shaft anticlockwise until the locking teeth and the outer ring teeth are completely separated, and enabling the slender shaft assembly to be switched from a locking state to an unlocking state;
s2: moving the moving pipe axially to make the moving pipe and the static pipe generate relative axial displacement, thereby adjusting the length of the elongated pipe assembly to a proper position;
s3: and the moving bolt is pushed from the near end to the far end to enable the rotating fixture block to rotate clockwise around the first rotating shaft and the second rotating shaft until the locking teeth are meshed with the outer ring teeth, and meanwhile, the second locking surface is matched with the first locking surface, so that the rotating fixture block is locked, and the unlocking state is switched into the locking state.
In the case shown, the sleeve assembly is divided into a sealing assembly and an elongated tubular assembly, the static tube of which is connected to the lower capsule of the sealing assembly, but the static tube may also be integrated with the lower capsule as a single piece. As shown in fig. 18, in an alternative embodiment, the second seal cartridge 230 comprises a cartridge body proximal end 232 and a cartridge body distal end 234, and a wall portion 235 extending therebetween, the cartridge body distal end 234 extending distally to form the static tube 300. The static tube 300 includes a static tube proximal end 310 and a static tube distal end 330 with a static tube wall 320 extending therebetween. The static tube wall 320 defines a first hollow passage 321. The exterior of the static tube wall 320 comprises a first rib 340 and a second rib 350 extending from the far end of the static tube to the near end thereof, and the far end 330 of the static tube comprises a limit notch 331 between the first rib 340 and the second rib 350. The first rib 340 includes a first transverse hole 341, and the second rib 350 includes a second transverse hole 351. In an alternative arrangement, the proximal end of the first rib 340 includes a first runner 349 and the proximal end of the second rib 350 includes a second runner 359.
In the illustrated case, only one lever lock or one rotary buckle is included, and it should be understood by those skilled in the art that two or more sets of the illustrated first and second ribs and their auxiliary structures and the lever lock or rotary block may be disposed along the outer circumference of the stationary pipe to increase the stability, and the related mechanisms may be operated simultaneously when locking or releasing. ,
those skilled in the art will readily appreciate that the cannula assembly also requires a mating needle. The needle penetration cannula assembly constitutes a puncture instrument which is then passed together through the abdominal wall via an incision previously provided in the abdominal wall of the patient into the body cavity, and the needle is then removed leaving the tube as a passage for the instrument into and out of 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 cannula assembly formed by the telescopic bottom shell assembly can be retracted to the shortest length of the initial position, and then matched with the improved knife-free visual puncture needle to form the puncture needle for penetrating through the abdominal wall, the static tube and the moving tube are rotated relatively after the puncture needle is taken away, and then the fixed depth of the cannula assembly on the abdominal wall is adjusted, so that the external section (length H1), the body wall section (length H2) and the internal section (length H3) of the cannula assembly reach ideal settings. A retractable needle may also be designed to mate with the retractable cannula 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 (3)
1. An elongated tube assembly including a lever lock for use in minimally invasive surgery, characterized by:
1) comprises a static pipe, a moving pipe and a lever lock;
2) the static tube comprises a static tube proximal end, a static tube distal end and a static tube wall extending therebetween, the appearance of the static tube wall comprises a first rib and a second rib, the first rib and the second rib extend from the static tube distal end to the static tube proximal end, the first rib comprises a first transverse hole, and the second rib comprises a second transverse hole;
3) the lever lock includes a proximal lever end and a distal lever end and a lever arm extending therebetween, the lever arm including a first pivot and a second pivot; the lever lock is arranged between a first rib and a second rib of the static pipe, wherein the first rotating shaft is matched with the first transverse hole, the second rotating shaft is matched with the second transverse hole, and the lever lock can rotate around the first rotating shaft and the second rotating shaft;
4) said moving tube comprising a proximal moving tube end and a distal moving tube end and a moving tube wall extending therebetween, said moving tube being mounted within said static tube for axial movement relative thereto; the outer surface of the movable pipe wall comprises a plurality of axially and uniformly distributed outer ring teeth, and the far end of the lever comprises locking teeth matched with the outer ring teeth;
including locked and unlocked states; in the locked state, the lever lock locks the moving pipe and limits the moving pipe to axially move relative to the static pipe; in the unlocking state, the movable pipe can axially move relative to the static pipe;
in a locked state, the lever lock rotates clockwise around the first rotating shaft and the second rotating shaft until the lock teeth are meshed with any one of the outer ring teeth, and the lever arm is contacted with the static tube so as to limit the moving tube from the far end to the near end; in an unlocking state, the lever lock rotates around the first rotating shaft and the second rotating shaft anticlockwise until the lock teeth are completely separated from the outer ring teeth, and then the moving pipe can axially move relative to the static pipe;
the elongated tube assembly further includes a tension mechanism that limits counterclockwise rotation of the lever lock about the first and second axes of rotation to limit proximal to distal movement of the tube;
the tension mechanism comprises an inward concave pit arranged in the middle of the lever arm and an elastic sheet arranged in the inward concave pit, the elastic sheet is in a compressed state, and thrust on the lever arm is generated to enable the lever lock to rotate clockwise around the first rotating shaft and the second rotating shaft so as to limit the moving pipe to move from the near end to the far end.
2. The elongated tube assembly of claim 1, wherein the tension mechanism includes a first runner disposed proximate the first rib, a second runner disposed proximate the second rib, and a slider mounted in the first and second runners; the near end of the lever comprises a lever pushing surface and a lever locking surface; the sliding block comprises a sliding block pushing surface and a sliding block locking surface; the slide block can move between a near end stroke end point and a far end stroke end point along the first sliding chute and the second sliding chute; in a locked state, the sliding block moves to a far-end stroke end point, and the sliding block locking surface is in contact with the lever locking surface, so that the lever lock is limited to rotate anticlockwise around the first rotating shaft and the second rotating shaft, and the moving pipe is further limited to move from the near end to the far end.
3. The elongate tube assembly of claim 2, wherein: when the sliding block moves from the far end stroke end point to the near end stroke end point, the sliding block locking surface and the lever locking surface are mutually separated, the lever lock can rotate anticlockwise around the first rotating shaft and the second rotating shaft until the locking teeth are completely separated from the outer ring teeth, so that the slender shaft assembly is switched from a locking state to an unlocking state; the slider is pushed to the far end by the near end again, the slider pushing surface interacts with the lever pushing surface to force the lever lock to wind around the first rotating shaft, the second rotating shaft rotates clockwise until the locking tooth is meshed with the outer ring tooth, the slider locking surface and the lever locking surface continuously move to be in contact, so that the lever lock is limited to wind around the first rotating shaft and the second rotating shaft to rotate anticlockwise, the moving of the moving pipe from the near end to the far end is further limited, and the unlocking state is switched to the locking state.
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| CN202010825797.4A CN111887955B (en) | 2020-08-17 | 2020-08-17 | Elongated tube assembly containing lever lock for minimally invasive surgery |
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| CN202010825797.4A CN111887955B (en) | 2020-08-17 | 2020-08-17 | Elongated tube assembly containing lever lock for minimally invasive surgery |
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| CN207870944U (en) * | 2017-07-06 | 2018-09-18 | 河南驼人医疗器械集团有限公司 | A kind of combined spinal-epidural paracentesis trocar with latch functions |
| CN110353784A (en) * | 2019-08-21 | 2019-10-22 | 南方医科大学珠江医院 | A kind of depth-adjustable and laparoscope of fixation punctures set |
| CN110974502A (en) * | 2019-11-14 | 2020-04-10 | 先健科技(深圳)有限公司 | Conveyor and implant conveying system |
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| US20080228213A1 (en) * | 2007-03-15 | 2008-09-18 | Terumo Cardiovascular Systems Corporation And Olympus Medical Systems Corporation | Variable size trocar |
| US9332973B2 (en) * | 2008-10-01 | 2016-05-10 | Covidien Lp | Needle biopsy device with exchangeable needle and integrated needle protection |
| WO2010065901A1 (en) * | 2008-12-04 | 2010-06-10 | Pivot Medical, Inc. | Method and apparatus for accessing the interior of a hip joint, including the provision and use of a novel telescoping access cannula and novel telescoping obturator |
| US10987129B2 (en) * | 2015-09-04 | 2021-04-27 | Medos International Sarl | Multi-shield spinal access system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207870944U (en) * | 2017-07-06 | 2018-09-18 | 河南驼人医疗器械集团有限公司 | A kind of combined spinal-epidural paracentesis trocar with latch functions |
| CN110353784A (en) * | 2019-08-21 | 2019-10-22 | 南方医科大学珠江医院 | A kind of depth-adjustable and laparoscope of fixation punctures set |
| CN110974502A (en) * | 2019-11-14 | 2020-04-10 | 先健科技(深圳)有限公司 | Conveyor and implant conveying system |
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