WO2018218993A1 - Chuck-type reducer cannula device and puncture device - Google Patents

Abstract

Provided are a chuck-type reducer cannula device and a puncture device. The cannula device comprises a reducer cannula assembly (300), a lower cover plate (104) and a lower housing (103). The reducer cannula assembly (300) is clamped and fixed by means of the lower cover plate (104) and the lower housing (103). The reducer cannula assembly (300) comprises a first split cannula (301), a second split cannula (302) and a third split cannula (303) capable of moving in a radial direction, and a thin film cannula (101) wrapped around the first, second and third split cannulas (301, 302, 303). The first, second and third split cannulas (301, 302, 303) are arranged in a circular ring shape along a longitudinal axis (1000), and together with the thin film cannula (101), form a hollow channel for a surgical instrument to access or exit therefrom. The reducer cannula assembly (300) further comprises a vortex drive mechanism (308). The vortex drive mechanism (308) drives the first, second and third split cannulas (301, 302, 303) to move linearly close to the longitudinal axis (1000) or move linearly away from the longitudinal axis (1000) in a radial direction, so as to achieve a diameter change of the cannula assembly.

Description

Chuck type reducer sleeve device and puncturing device Technical field

The present invention relates to a minimally invasive surgical instrument, and more particularly to a trocar structure.

Background technique

A trocar is a surgical instrument used to create an artificial passage into a body cavity during minimally invasive surgery (especially for hard laparoscopic surgery). It usually consists of a cannula assembly and a puncture needle. The general clinical use is as follows: firstly, a small opening is cut in the skin of the patient, and then the puncture needle is inserted through the cannula assembly, but penetrates the abdominal wall through the skin opening to enter the body cavity. Once the body cavity is inserted, the needle is removed, leaving the cannula assembly as a passage for the instrument to enter and exit the body cavity.

In hard laparoscopic surgery, especially in laparoscopic surgery, the pneumoperitoneum is usually used to continuously perfuse the patient's abdominal cavity with gas (such as carbon dioxide gas) and maintain a stable air pressure (about 13 ~ 15mmHg) to obtain sufficient operation space. . The cannula assembly typically consists of a cannula, a housing, a sealing membrane (also known as an instrument seal), and a zero seal (also known as an automatic seal). The cannula penetrates from outside the body cavity into the body cavity as a passage for the instrument to enter and exit the body cavity. The outer casing joins the casing, zero seal and sealing membrane into a sealed system. The zero seal typically does not provide a seal for the insertion instrument and automatically closes and forms a seal when the instrument is removed. The sealing film tightens the instrument and forms a seal when the instrument is inserted.

In a typical gallbladder endoscopic procedure, four puncture channels are typically established in the abdominal wall of the patient, namely two small inner diameter cannula assemblies (typically 5 mm) and two large inner diameter cannula assemblies (typically 10 mm). The instrument that typically enters the patient via the small-diameter cannula assembly performs only ancillary procedures; one of the large-diameter cannula assemblies acts as an endoscope channel; and the other large-diameter cannula assembly serves as the primary access for the surgeon to perform the procedure. In this main channel, about 5% of the time applies 5mm instruments; about 20% of the time applies other large diameter instruments; and 5mm instruments and large diameter instruments need to be switched frequently during surgery. The application of small-diameter instruments takes the longest time, and its sealing reliability is more important; the application of large-diameter instruments is often a critical stage in the operation (such as vascular closure and tissue suture), and its switching convenience and operational comfort are more important.

With the extensive development of laparoscopic surgery in the field of gynecology and gastroenterology, the variety of surgery is becoming more and more diverse, and the demand for the trocar is also diversified. For example, in a typical bowel surgery, a 15 mm stapler needs to be inserted into the patient through a trocar. However, usually the main channel is a 10 mm or 12 mm trocar, and an additional 15 mm puncturing channel is required. For example, in a typical gynecological procedure, a 15 mm puncture channel is required to facilitate the removal of the cut uterine tissue. However, usually the main channel is a 10 mm or 12 mm trocar, and an additional 15 mm puncturing channel is required. In the above two surgical scenarios, if the diameter of the puncture channel can be easily switched from 10 mm (12 mm) to 15 mm in diameter, and the stapler can be inserted for anastomosis or a large diseased organ (tissue), the additional puncture channel can be reduced. Small damage to the patient. So far, there is no such type of trocar.

Summary of the invention

In order to solve one or more problems of the prior art, the present invention provides a chuck type reducer sleeve device including a reducer sleeve assembly, a lower cover, a lower housing, the lower cover and the lower case The reducer sleeve assembly is fixedly clamped, wherein the reducer sleeve assembly includes a first flap sleeve that is radially movable, a second flap sleeve, a third flap sleeve, and a wrapper first a second, third, cannula membrane sleeve, the first, second, and third valve sleeves are arranged in a circular shape along the longitudinal axis and form a hollow passage for the surgical instrument to enter and exit with the membrane sleeve The reducer sleeve assembly further includes a scroll drive mechanism that drives the first, second, and third valve sleeves to move linearly about the longitudinal axis or away from the longitudinal axis. Linear motion.

In an implementation of the present invention, the first, second, and third valve sleeves respectively include first, second, and third valve bodies and the first, second, and third valve bodies The first, second, and third valve sleeves are driven by the proximal end, and the first, second, and third valve sleeves respectively drive the first, second, and third guide rails and the proximal end thereof First, second, third vortex groove.

In still another implementation of the present invention, the reducer sleeve assembly includes an initial state and an expanded state: in the initial state, the first, second, and third valve bodies are formed to have a substantially circular shape a transverse cross-section of the ring, the inner diameter of the basic ring is D1; in the expanded state, the first, second and third valve bodies move radially away from the longitudinal axis to form a transverse section with a swollen ring, and expand The inner diameter of the large ring is D2 and D2 > D1.

In still another implementation of the present invention, the scroll drive mechanism includes a drive table, a gear turntable, and a turntable drive assembly that drives the gear turntable to rotate along a longitudinal axis.

In still another implementation of the present invention, the gear turntable includes a turbine ring body penetrating through holes, the outer circumference of the turbine ring is provided with gear teeth, and a distal end surface of the turbine ring body is provided with a spiral a turntable scroll groove, the turntable scroll groove is matched with the shape of the first, second, and third scroll grooves; the drive table includes a torus having a through hole for allowing the instrument to enter and exit, The annular body comprises a hole wall and an outer wall, and a drive table chute transversely extending through the outer wall to the hole wall and respectively matched with the first, second and third guide rails, the drive table chute being equally divided along the axial direction of the instrument through hole It is provided that the first, second, and third sleeves drive linear motion along the drive table chute near the longitudinal axis or away from the longitudinal axis.

In still another implementation of the present invention, the turntable drive assembly includes a worm that meshes with the gear teeth, a worm drive hand wheel that interfaces with the worm, the worm includes teeth that are coupled to the gear turntable a matching scroll tooth shape; rotating the worm to drive the hand wheel to drive the worm to rotate, further driving the gear wheel to make axial rotation.

In still another implementation of the present invention, the turntable drive assembly includes a rack drive assembly and a rack lock assembly, the rack drive assembly for driving the gear turntable to rotate, the rack lock assembly Locking or releasing the rack; the rack drive assembly includes a rack, a rack drive button, a rack return spring and a rack drive seal sleeve, the rack front surface comprising a plurality of parameters and a gear turntable upper wheel The tooth has a uniform tooth shape and meshes with the tooth, the back surface of the rack includes a plurality of limiting slots, and the rack driving button is pressed to drive the rack to perform a linear motion, thereby further driving the gear wheel to rotate about the longitudinal axis; The rack drive button is released, and the rack is reset by the rack return spring.

In still another implementation of the present invention, the turntable drive assembly includes a limiter, a limiter return spring, a limiter drive button, and a seal ring that is disposed on the limiter drive button. The distal end of the positioner is provided with a limit hook and a limiter hole. Under the force of the limiter return spring, the limiter button pulls the limiter to rotate along the limiter hole to make the limit hook Automatically snapping into the limiting slot on the back of the rack to define a linear motion of the rack; pressing the stopper driving button, the stopper button pushes the stopper to rotate in the opposite direction along the stopper hole, The limit hook is disengaged from the limiting slot, and the rack is de-defined.

In still another embodiment of the present invention, the first, second, and third valve bodies are made of a metal material and molded by one press, or by cutting a circular metal tube into three parts.

Another object of the present invention is to provide a trocar comprising a cannula assembly and a puncture needle extending through the cannula assembly, the cannula assembly including the reducer cannula device, the reducer cannula device further comprising a lower retaining ring, The lower housing and the lower retaining ring clamp the fixed membrane sleeve, the sleeve assembly further comprising an upper retaining ring, the upper retaining ring sealingly fixing the duckbill to the cannula device to form a first sealing component, A second seal assembly is coupled to the first seal assembly.

DRAWINGS

In order to more fully understand the essence of the present invention, a detailed description will be made with reference to the accompanying drawings, in which:

Figure 1 is a schematic view showing a simulated abdominal puncture position of a typical laparoscopic surgery;

Figure 2 is a perspective view of the sleeve assembly of the first embodiment of the present invention;

Figure 3 is a perspective partial cross-sectional view of the bushing assembly of Figure 2;

Figure 4 is an exploded view of the second seal assembly of Figure 2;

Figure 5 is a cross-sectional view of the sealing assembly of Figure 4 after assembly;

Figure 6 is a perspective view of the first sealing assembly of Figure 3;

Figure 7 is an exploded view of the first seal assembly of Figure 6;

Figure 8 is an exploded view of the reducer sleeve assembly of Figure 7;

Figure 9 is a perspective view of the worm of Figure 8;

Figure 10 is a perspective view of the gear turntable shown in Figure 8;

Figure 11 is a perspective view of the drive table shown in Figure 8;

Figure 12 is an exploded perspective view of the second valve cannula of Figure 8;

Figure 13 is a perspective view, partly in section, of the reducer sleeve assembly of Figure 8;

Figure 14 is a schematic view showing the drive of the reducer sleeve assembly shown in Figure 13;

Figure 15 is a schematic exploded view showing the reduction sleeve assembly shown in Figure 14;

Figure 16 is a perspective view of the lower case shown in Figure 7;

Figure 17 is a schematic view of the reduction sleeve assembly of Figure 7 loaded into the lower housing;

Figure 18 is a perspective view of the lower cover shown in Figure 7;

Figure 19 is a perspective partial cross-sectional view of the first seal assembly of Figure 3;

Figure 20 is a cross-sectional view showing the initial state of the first seal assembly shown in Figure 19;

Figure 21 is a cross-sectional view showing the state in which the first sealing member shown in Figure 19 is inflated;

Figure 22 is a cross-sectional view of the initial state 22-22 shown in Figure 20;

Figure 23 is a cross-sectional view of the expanded state 23-23 shown in Figure 21;

Figure 24 is a perspective view showing a second embodiment of the reduction sleeve device (the sleeve and the lower cover are not shown);

Figure 25 is an exploded perspective view of the reducer sleeve device of Figure 24;

Figure 26 is a cross-sectional view of the reducer sleeve device of Figure 24;

Figure 27 is a schematic view showing the initial state of the reducing sleeve device shown in Figure 24;

Figure 28 is a schematic view of the pressing rack locking assembly of the reducing sleeve device shown in Figure 27;

Figure 29 is a schematic view of the pressing rack drive assembly of the reducer sleeve device of Figure 28;

Figure 30 is a schematic view showing the simultaneous reduction of the rack lock assembly and the rack drive assembly of the reducer sleeve device of Figure 24;

Figure 31 is still another cross-sectional view of the initial state of the first seal assembly shown in Figure 20;

Figure 32 is a cross-sectional view showing another state in which the first sealing member shown in Figure 21 is inflated;

In all the views, the same reference numerals indicate equivalent parts or parts.

detailed description

Embodiments of the present invention are disclosed herein, but it should be understood that the disclosed embodiments are merely examples of the invention, which may be implemented in various ways. Therefore, the disclosure of the present invention is not to be construed as limiting, but as a basis

Referring to FIGS. 1-3, for convenience of description, one of the parties immediately adjacent to the operator is defined as the proximal end, and the side remote from the operator is defined as the distal end, and the central axis defining the cannula assembly 10 is the longitudinal axis 1000, which is generally parallel. The direction of the longitudinal axis is referred to as the axial direction, and the subsequent direction substantially perpendicular to the longitudinal axis is referred to as the lateral direction, and the direction perpendicular to the longitudinal axis 1000 and perpendicular to the longitudinal axis is referred to as the radial direction. The central axis of the worm 305 defining the reducer sleeve assembly 300 is the transverse axis 2000, the distal end of the transverse axis 2000 is referred to as the forward end, and the proximal end of the transverse axis 2000 is referred to as the reverse direction.

As shown in Fig. 1, the scene in the gynecological and gastroenterology field in the foregoing background is depicted, and four puncturing devices 1 (2, 3, 4) are respectively inserted into the abdominal cavity 6 of the patient, when it is necessary to use the stapler 5 When the wound is anastomosed or a large diseased organ (tissue) is removed, a 15 mm cannula assembly is usually required to operate, and in the time of minimally invasive surgery, the 10 mm cannula assembly can fully meet the requirements of use. Those skilled in the art should understand that in order to reduce the size of the wound of the patient and reduce the additional puncture channel, if the diameter of the puncture channel can be easily switched from 10 mm (12 mm) to 15 mm in diameter, the surgeon can greatly facilitate the operation and reduction of the surgeon. For the patient's injury.

2-24 detail the overall structure of the trocar of the first embodiment of the present invention. As shown in Figures 3-8, a typical trocar includes a puncture needle 50 (not shown) and a cannula assembly 10. The cannula assembly 10 has an open proximal end 292 and an open cannula distal end 377. In a typical application, the puncture needle 50 extends through the cannula assembly 10 and then penetrates the entire abdominal wall through the skin opening into the body cavity. Once in the body cavity, the puncture needle 50 is removed and the cannula assembly 10 is left as a passage for the instrument to enter and exit the body cavity. The proximal end 292 is external to the patient and the distal end 377 is in the patient. A preferred cannula assembly 10 can be divided into a first seal assembly 11 and a second seal assembly 12. The card slot 139 of the component 11 and the hook 262 of the component 12 are fastened. The cooperation of the hook 262 and the card slot 139 is a quick lock structure that can be quickly split by one hand. This is mainly for the purpose of taking out tissues or foreign bodies in the patient during surgery. There are a number of implementations of the quick lock connection between the assembly 11 and the assembly 12. In addition to the structure shown in this embodiment, a threaded connection, a rotary snap or other quick lock structure may be employed. Alternatively, the assembly 11 and assembly 12 can be designed as structures that are not quick to split.

3, 7-8 depict the composition and assembly relationship of the first seal assembly 11. For convenience of description, the variable diameter sleeve assembly is subsequently in an unreduced state (ie, the sleeve 307 is in a closed state) as an initial state, and the variable diameter sleeve assembly is reduced in diameter (ie, the sleeve 307 is inflated). Inflated state. The first seal assembly 11 includes a reducer sleeve assembly 15, a duckbill seal 107 and an upper retaining ring 106 that extend through the sleeve distal end 377. The reducer sleeve assembly 15 includes a reducer sleeve assembly 300, a lower cover 104 lower housing 103 and a lower retaining ring 102 for effecting dimensional changes in the diameter of the sleeve.

The reducer sleeve assembly 300 is fixed in the axial direction by the lower cover 104 and the lower case 103. The lower cover 104 has an inner wall 148 that supports a duckbill seal. A flange 176 of the duckbill seal 107 is sandwiched between the inner wall 148 and the upper retaining ring 106. There are a plurality of fixing manners between the upper fixing ring 106 and the lower cover 104, and an interference fit, ultrasonic welding, glue bonding, snap fastening, and the like can be adopted. In the embodiment, the fixing ring 106 and the lower cover 104 adopt an annular engagement interference fit, and the interference fit makes the duckbill seal 107 in a compressed state. The reducer sleeve assembly 300, the inner wall 148, the duckbill seal 107 and the intake valve (not shown) together form a first chamber 13, which forms the intake system passage and is also an instrument Access to the body cavity. In this embodiment, the duckbill seal 107 is a single slit, but other types of closure valves may be used, including a tongue valve, a multi-slot duckbill valve. When the external instrument passes through the duckbill seal 107, its duckbill 173 can be opened, but it typically does not provide a complete seal with respect to the instrument. When the instrument is removed, the duckbill 173 automatically closes, thereby preventing fluid within the first chamber 13 from leaking out of the body.

Figures 3-5 depict the composition and assembly relationship of the second seal assembly 12. The sealing film assembly 208 is sandwiched between the cap plate 206 and the upper casing 209. The proximal end 282 of the sealing membrane assembly 208 is secured between the inner ring 266 of the cover plate 206 and the inner ring 296 of the upper housing 209. There are a plurality of fixing manners between the upper casing 209 and the cover plate 206, and an interference fit, ultrasonic welding, glue bonding, snap fastening, and the like can be adopted. This embodiment shows that the outer casing 291 of the upper casing 209 and the outer casing 261 of the cover plate 206 are fixed by ultrasonic welding. This fixation causes the proximal end 282 of the sealing membrane assembly 208 to be in a compressed state. The central bore 263 of the cover plate 206, the inner ring 266 and the sealing membrane assembly 208 together form a second chamber 14.

4-5 depict the composition and assembly relationship of the sealing membrane assembly 208. The sealing film assembly 208 includes a sealing film 280 and a protective device 281. The protection device 281 is embedded in the sealing film 280. The protection device 281 is sized and shaped to be mounted inside the sealing film 280 without interfering with the sealing film 280. The protective device 281 moves or floats with the sealing film 280 for protecting the central portion of the sealing film 280 from perforations or tears caused by the sharp edges of the inserted surgical instrument. The sealing film 280 is usually made of an elastic material such as natural rubber, silica gel or isoprene rubber; the protective device 281 is usually made of a rigid or semi-rigid material such as a thermoplastic elastomer, polypropylene, polyethylene, or vinyl.

Figures 6-13 depict the composition and assembly relationship of the reducer sleeve assembly 15. The reducer sleeve device 15 includes the reducer sleeve assembly 300, the lower cover 104 and the lower housing 103, and the lower retaining ring 102. The lower retaining ring 102, the lower cover 104 and the lower housing 103 clamp and secure the reducer sleeve assembly 300.

As shown in FIGS. 7-8, 12, and 22, the reducer sleeve assembly 300 includes a first flap sleeve 301, a second flap sleeve 302, and a third flap sleeve 303 that can be assembled to form a sleeve 307. And a film sleeve encasing the first, second, and third valve sleeves. The first, second, and third valve sleeves 301 (302, 303) are arranged in a circular shape along the axis 1000 of the reducer sleeve assembly 300. The first, second, and third valve cannula 301 (302, 303) respectively include first, second, and third valve bodies 316 (326, 336) and first, second, and third cuffs The proximal end 318 (328, 338) connects the fixed first, second, and third valve cannula drives 310 (320, 330). The first, second, third valve body 316 (326, 336) further includes first, second, and third valve cannula distal ends 317 (327, 337). The first, second, and third valve cannula distal ends 317 (327, 337) form a cannula distal end 377, and the first, second, and third valve bodies 316 (326, 336) are identical in shape and waiting The tube body 376 is divided into a plurality of parts. The tube body 376 has a circular cross section in an initial state and is defined by the film sleeve 101. The first, second, and third valve sleeves 301 (302, 303) are moved toward the axis direction to When mutually abutting, the radial cross-section of any tube is taken, the first, second and third valve bodies 316 (326, 336) are abutted into an approximately circular shape, and the film sleeve 101 is wrapped in The outermost, central through hole is used to accommodate instrument access (shown in Figure 22). 12, for the sake of convenience of description, a more detailed description is made with a second bushing drive 320, which includes a second rail 323 having a cross-sectional shape approximately "I" shaped, the second rail The proximal end of the 323 (i.e., the top of the mandrel) includes a second scroll slot 324 having a distal end (i.e., the bottom of the stem) that includes a second tube attachment portion 321 that is coupled to the proximal end 328 of the second annulus. The second rail 323 further includes a second cam 322 extending laterally inwardly from the distal end of the second rail 323, and the extension length does not exceed the wall thickness of the tube 326, and the second sleeve drives 320 and the second flap. The proximal end 328 of the sleeve can be fixed by welding, bonding or the like. First, the third valve cannula drive 310 (330) is substantially identical to the second valve cannula drive 320, but the first, second, and third scroll slots 314 (324, 334) are slightly different to ensure the first Second, the third valve sleeve 301 (302, 303) is synchronized with the initial state and the motion of the inflated state, the first and second of the first and second third cannula drive 310 (320, 330), The third scroll grooves 314 (324, 334) are respectively matched to the shape of the turn spiral groove 343.

The first, second, and third valve bodies 316 (326, 336) are stamped and formed from sheet metal material. It should be understood by those skilled in the art that the metal materials used in the first, second, and third valve bodies 316 (326, 336) include stainless steel alloy materials having good ductility and high molding strength, while others are suitable for stamping. Alloy materials that satisfy biocompatibility can also be applied to the present invention. In order to ensure the strength of the first, second, and third valve bodies 316 (326, 336), the present embodiment uses a stainless steel material having a thickness of 0.8 mm for one-time stamping, and those skilled in the art should understand that in order to increase the strength, It is also within the scope of the present invention for the first, second, and third valve bodies 316 (326, 336) to be stamped to form outwardly convex ribs or to increase their thickness. In still another alternative, the first, second, and third valve bodies 316 (326, 336) are formed by cutting a circular metal tube into three portions that are substantially equally divided. The first, second, and third valve sleeve drives 310 (320, 330) are injection molded using a POM material, and may also be die casted from a metal material.

As shown in Figure 7, the film cannula 101 includes a distal end of the tubular body 111 at its distal end, a proximal end 114 of the proximal end of the tubular body, a transition portion 112 extending distally from the proximal end 114 of the tubular body, and a connecting tube. The body 110 of the distal end 111 and the transition section 112. The tubular body proximal end 114 extends laterally outwardly from the U-shaped body of revolution 113. The rotating body 113 includes a fixing surface 115 at the bottom of the U-shaped rotating body. The diameter of the proximal end 114 of the tubular body is greater than the diameter of the tubular body 110. The lower housing 103 and the lower fixing ring 102 clamp the fixed film sleeve fixing surface 115. Those skilled in the art will appreciate that in order to minimize the footprint of the outer diameter of the elongated sleeve 307 formed by the reducer sleeve assembly 300 while ensuring good strength, the film sleeve 101 is blow molded from an elastic film material. It can swell and recover automatically. The thickness of the film sleeve 113 is usually from 0.1 mm to 0.5 mm. In another optional technical solution, as shown in FIGS. 31-32, the film sleeve 101a is blow molded from a flexible film material such as PET, PP, PC or the like. During the reducing process, the film sleeve 101a does not undergo elastic deformation or only slight elastic deformation, and the variable diameter is increased, mainly relying on compression in the first, second, and third valve bodies 316 (326, 336). The pleats at the seams are stretched.

As shown in Figures 8-11, the reducer sleeve assembly 300 further includes a scroll drive mechanism 308 for driving the first, second, and third valve sleeves 301 (302, 303) to make a radial straight line. motion. The first, second and third valve sleeves 301 (302, 303) are driven by the scroll drive mechanism 308 while performing a linear motion about the axis or a linear motion away from the axis in the radial direction. The scroll drive mechanism 308 includes a drive table 306, a gear turntable 304 and a turntable drive assembly 309 that drives the gear turntable 304 to rotate along the axis 1000 within the drive table 306. The turntable drive assembly 309 includes a worm 305 that meshes with the teeth. The gear turntable 304, the worm 305 is loaded into the drive table 306 and meshed to form a worm linkage.

As shown in FIG. 7, the turntable drive assembly 309 also includes a worm drive hand wheel 105 that interfaces with the worm 305. The worm driving hand wheel 105 sequentially includes a knob 151, a boss 152, a rotating shaft 155, a limiting groove 154 and a driving boss 153 from the proximal end to the distal end. The driving boss 153 is coupled with the connecting groove 355 of the worm 305, and can rotate the knurl 305 by rotating the knob 151. The limiting slot 154 is defined by the slot 147 such that the worm drive hand wheel 105 can only make a rotational movement in the aperture 136 of the lower housing 103. The worm driving hand wheel 105 further includes a hand wheel sealing ring 159 on the rotating shaft 155 and sealing action. The hand wheel sealing ring 159 is inserted into the rotating shaft 155 and then loaded into the mounting groove 138 of the lower casing 103 and is raised by the boss. 152 is defined together to the sealing action. The worm drive hand wheel 105 is rotated to drive the worm 305 to rotate, further driving the gear turntable 304 to perform axial rotation.

As shown in FIG. 9, the worm 305 includes a distal shaft 352, a proximal end 353 thereof, and a shaft 350 connecting the convex shaft 352 and the head. The rod 350 is provided with a wrap 351. The worm 305 also includes an annular groove 354 extending proximally from the head 353 and a coupling groove 355. The connecting groove 355 is engaged with the driving boss 153 of the worm drive hand wheel 105. The worm 305 acts roughly as a worm.

As shown in FIG. 10, the gear turntable 304 includes a turbine ring body 340 defined by a through hole 345. The outer circumference of the turbine ring body 340 is provided with gear teeth 341 and a wrap shape 351 of the worm 305. Engage. The hole wall 346 defines a hole 345, and a spiral line disposed around the ring surface of the turbine ring body 340 forms a turntable scroll groove 343, and the turntable scroll groove 343 is first, second, and third. The swirl grooves 314 (324, 334) are shaped to match the bite. The gear turntable 304 is substantially equivalent to a turbine action. The worm 305 and the gear turntable 304 form a worm gear. It should be understood by those skilled in the art that the worm-and-worm mode motion realizes a self-locking function by setting specific thread and gear tooth matching parameters, that is, the gear wheel 304 can only be driven from the direction of the worm 305, and the gear wheel 304 cannot The drive worm 305 operates in reverse.

As shown in FIG. 8 and FIG. 11, the drive table 306 includes a through hole 361 for passing through the instrument and a toroidal body 360 defined therein, the through hole 361 being defined by a hole wall 362, the gear turntable 304 Rotating motion is performed around the hole wall 362. The annular body 360 further includes an outer wall 367, and three I-shaped drive table chutes extending transversely through the outer wall 367 to the hole wall 362 and respectively mating with the first, second, and third guide rails 313 (323, 333). 363, the driving table chute 363 is axially equally divided along the through hole 361, and the guide rail 313 (323, 333) and the driving table chute 363 are matched with the I-shaped rail and the chute in the present invention. An optional technical solution can also be matched with a T-shaped rail chute, or a dovetail slot rail chute. The radial length dimension of the first, second, and third guide rails 313 (323, 333) is smaller than the radial length dimension of the drive table chute 363. The outer side of the outer wall 367 extends laterally out of a worm slot 365 for mounting the worm 305, the worm slot 365 including a first shoulder 364 connected to its distal end and a second shoulder 366 at its proximal end. The male shaft 352 and the annular groove 354 are matched with the first shoulder 364 and the second shoulder 366, respectively. The gear turntable 304 drives the first, second, and third sleeves 301 (302, 303) to move linearly along the axis or away from the axis along the drive table chute 363.

As shown in Figures 7, 16, and 19, the lower housing 103 includes an aperture 131 that can be threaded into the sleeve 307 of the reducer sleeve assembly 300, the outer housing 130 and defining first, second, and third petals. The sleeve 301 (302, 303) has an inner wall 135 that moves radially outward. The aperture 131 is defined by the aperture wall 132. The lower housing 103 further includes a plurality of fixing holes 133 that are clamped and fixed to the fixing sleeve 149 of the lower cover 104 by an interference fit. The outer casing 130 is provided with a hole 136 for mounting the worm drive hand wheel 105. The hole 136 defines a hollow guide post 137 extending laterally outwardly, and the proximal end inner edge of the guide post 137 is provided with a hand wheel seal 159. Mounting slot 138. The outer wall 367 of the drive table 306 is inserted into the inner wall 135 of the lower housing 103 to form an interference fit. The inner wall 135 defines a range of expansion of the first, second, and third valve sleeves 301 (302, 303), which is the first of the first, second, and third valve sleeves 301 (302, 303) in the initial state. Second, the minimum distance of the third rail 313 (323, 333) is the maximum size at which the first, second, and third rails 313 (323, 333) can expand along the drive table chute 363 of the drive table 306. The minimum distance is approximately equal to the variable radius difference R. As mentioned above, usually the surgeon usually needs to switch between 10mm--15mm cannula assemblies. In order to meet this need, the variable radius difference R≥2.5mm, that is, the radius from 5mm to the radius of 7.5mm, this implementation The variable radius difference R = 2.5 mm in the example.

As shown in Figures 7, 11 and 18, the lower cover 104 includes a through hole 141 for passing the instrument and an inner wall 148 defining a through hole 141, and an axial extension from the distal end of the lower cover 104 to the lower housing The fixing holes 133 of the 103 match the fixing posts 149, and the two form an interference fit. The proximal end of the inner wall extends laterally outwardly from the sealing wall 140, and the sealing wall 140 forms a mouth seal with the outer casing 130 of the lower casing 103. The lower cover 104 further includes a third shoulder 143 and a fourth shoulder 145, the first and third shoulders 364 (143) and the second and fourth shoulders 366 (145) collectively defining the worm 305 makes a rotary motion along the horizontal axis 2000. The lower cover 104 further includes a card arm 146, and the distal end of the card arm 146 includes a card slot 147, and the card arm 146 defines that the worm drive hand wheel 105 can only rotate in the hole 136 of the lower casing 103. . The inner wall 148 defines the gear turntable 304 in the drive table 306 in a clearance fit manner.

As shown in FIG. 7, the lower retaining ring 102 includes a hole 122 slightly larger than the tubular body 110 of the film sleeve 101, and a fixing post 121 fixedly coupled to the lower casing 103. The lower retaining ring 102 also includes a boss 123 that extends proximally of the bore 122. The boss 123 clamps the fixing surface 115 of the film sleeve 103 when the lower casing 103 and the lower fixing ring 102 are fixed.

8-18, the approximate assembly process of the reducer sleeve device 15 includes:

First, the installation of the reducer cannula assembly 300, the first, second, and third valve cannula proximal ends 318 (328, 338) of the first, second, and third valve cannula 301 (302, 303) Connecting the fixed first, second, and third valve cannula drives 310 (320, 330) to form first, second, and third valve cannula 301 (302, 303), and then first, second, and The three-segment sleeves 301 (302, 303) are respectively inserted into the drive table chutes 363 corresponding to the drive table 306; then the gear turntables 304 and the worms 305 are respectively loaded into the drive table 306, so that The scroll tooth shape 351 of the worm 305 is meshed with the gear wheel 304 tooth 341, the turntable scroll groove 343 of the gear turntable 304 and the first, second, and third valve sleeves 301 (302, 303) The first, second, and third scroll grooves 314 (324, 334) are matched to the bite, and the reducing sleeve assembly 300 is adjusted to be in an initial state;

The reducer sleeve assembly 300 (when the worm drive hand wheel 105 without the turntable drive assembly 309 is not loaded) is then loaded into the lower housing 103 and the hand wheel seal 159 is loaded into the mounting slot 138 and then The worm drive hand wheel 105 is inserted into the hole 136 of the lower casing 103 and is movably connected to the worm 305. The connection groove 355 of the worm 305 is engaged with the transmission boss 153 of the worm drive hand wheel 105, and then the film is The sleeve 101 is nested by the sleeve distal end 377 of the sleeve 307 and exposes the sleeve distal end 377;

Finally, the lower fixing ring 102 is assembled on the lower casing 103, and the film sleeve 101 is sandwiched between the lower casing 103 and the lower fixing ring 102, and the fixing surface 113 is clamped and fixed; the fixing column 149 of the lower cover 104 is inserted. The fixing hole 133 of the housing 103 forms an interference fit. The fixing hole 133 is in an interference fit with the fixing post 149 of the lower cover 104 to define the reducer sleeve assembly 300. The gear turntable 304 and the worm 305 are not axially displaceable, respectively, along the longitudinal axis. 1000 and the horizontal axis 2000 do the rotational motion.

As shown in FIGS. 14-15, by rotating the worm drive hand wheel 105, the worm 305 performs a rotational movement between the lower cover 104 and the lower casing 103 along the transverse axis 2000, and the vortex tooth shape 351 of the worm 305. Engaging the gear turntable 304 gear teeth 341 to drive the gear turntable 304 to rotate along the hole wall 362 of the drive table 306. The turntable scroll groove 343 of the gear turntable 304 engages the first, second, and third valve sleeves. The first, second, and third scroll grooves 314 (324, 334) of 301 (302, 303) are limited by the drive table chute 363 of the drive table 306, and the second and third valve sleeves 301 (302) 303) linearly moving in the drive table chute 363 to achieve switching of the sleeve 307 from an initial state to a swollen state or from a swollen state to an initial state. The first, second, and third valve sleeves 301 (302, 303) are moved radially back and forth by rotating the knob 151, and the range of movement is substantially equal to the difference R of the variable radius.

The variable swell process of the reducer casing assembly 15 is depicted in detail in Figures 13-15 and Figures 19-24. As shown in FIG. 13, FIG. 19-20 and FIG. 22, in particular, in the initial state, the tubular body 110 of the film sleeve 101 encloses the tubular body 376 of the fixing sleeve 307 to form a section having a substantially circular shape;

As shown in FIG. 14-15 and FIG. 21-23, when the variable diameter needs to be adjusted, the knob 151 is rotated counterclockwise along the horizontal axis 2000, and the driving boss 153 of the worm driving hand wheel 105 drives the connecting groove 355 that is engaged with it to rotate. The scroll tooth shape 351 of the worm 305 rotates the gear wheel 304 tooth 341 meshing therewith to rotate the gear wheel 304 along the hole wall 362 of the driving table 306, and the wheel vortex of the gear wheel 304 The slot 343 is rotated to drive the first, second, third scroll slots 314 (324, 334) of the first, second, third flap sleeves 301 (302, 303) to move, due to the drive table of the drive table 306 The chute 363 limits that the second and third valve cannula 301 (302, 303) linearly move radially outward in the drive table chute 363, the first, second, and third valve cannula 301 The first, second, third valve body 316 (326, 336) of (302, 303) is inflated outwardly, and the tubular body 110 of the membrane cannula 101 is due to the first, second, and third valve bodies 316 ( 326,336) The outward expansion is expanded and expanded, and the basic annular section of the elongated tube (as shown in Fig. 22, initial state) becomes an approximately circular section (as shown in Fig. 23, Inflated state). Since the inner wall 135 of the lower casing 103 defines the range of expansion of the first, second, and third valve sleeves 301 (302, 303), the first, second, and third guide rails 313 (323, 333) are radially moved to contact the inner wall 135. At that time, the cannula assembly 10 reaches a maximum expanded diameter size.

As shown in Figures 21-23 and 31-32, in the initial state, the first, second and third valve bodies 316 (326, 336) are formed with a substantially circular ring. a transverse section, the inner annular inner diameter is D1; in the expanded state, the first, second and third valve bodies 316 (326, 336) move radially away from the longitudinal axis to form a swollen ring The transverse section, the inner diameter of the expanded ring is D2, and D2 > D1.

When it is required to restore the tapered sleeve assembly 10 to the initial state, it is only necessary to rotate the knob 115 clockwise along the horizontal axis 2000, and the transmission boss 153 of the worm drive hand wheel 105 drives the connection groove 355 with its engagement to rotate. The scroll tooth shape 351 of the worm 305 rotates the gear wheel 304 tooth 341 with which the meshing gear 341 rotates to rotate the gear wheel 304 along the hole wall 362 of the driving table 306. The turntable scroll groove 343 of the gear wheel 304 Rotating to move the first, second, and third scroll grooves 314 (324, 334) of the first, second, and third valve sleeves 301 (302, 303) to move, due to the drive table chute of the drive table 306 363 limiting, the second, third valve cannula 301 (302, 303) linearly moves inwardly in the drive table chute 363, the first, second, and third valve cannula 301 (302 The first, second, and third valve bodies 316 (326, 336) of 303) are inwardly reduced, and the tube body 113 of the membrane cannula 101 is due to the first, second, and third valve bodies 316 (326, 336). ) shrinks inwardly and elastically contracts, and the sleeve 307 is changed from a swollen state of an approximately annular section elongated tube (as shown in FIG. 23) to a basic ring type. The cross section (shown in Figure 22) is restored to its original state.

According to the foregoing, in the present embodiment, since the gear turntable 304 and the worm 305 have a self-locking function, when the first, second, and third valve bodies 316 (326, 336) are inflated, the abdominal wall is cut. The first, second, and third valve bodies 316 (326, 336) do not automatically move radially inward during linear compression. The cannula assembly 10 disclosed in the present invention is specifically exemplified by a 10 mm cannula assembly, which can be dimensionally changed according to actual needs of the operation, and can satisfy any diameter size between 10 mm and 15 mm. Since the casing assembly larger than 10 mm is used less frequently, the casing assembly 10 can be used as a conventional casing assembly when no diameter reduction is required. When surgery requires the use of a stapler for wound anastomosis or removal of a large diseased organ (tissue), the surgeon can make a reduction as needed. At this time, since only the original cannula assembly 10 is tapered, there is no need to increase it. The puncture channel does not require the original cannula assembly to be removed, and a large-sized cannula assembly is inserted. As shown in Fig. 23, after the variable diameter expansion of the cannula assembly 10, the section of the reduced diameter cannula assembly 300 is approximately circular, and the patient's muscles are laterally expanded directly in the original wound passage, so that the patient does not cause a wound. The damage greatly reduces the suffering of the patient and reduces the time required for subsequent rehabilitation. In addition, those skilled in the art should know that when the surgeon uses the prior art cannula assembly, it is necessary to increase the puncture channel or switch the cannula assembly, which also increases the workload of the surgeon, using the sleeve disclosed by the present invention. The tube assembly 10 can effectively reduce the working intensity of the surgeon and reduce the operation time.

24-30 detail the overall construction of the cannula assembly 20 of the second embodiment of the present invention. As shown in FIG. 18, the sleeve assembly 20 includes a first seal assembly 21 (not shown) and a second seal assembly 12. This embodiment is based on the first embodiment and is primarily directed to the turntable drive assembly of the first seal assembly. The driving method proposes another alternative technical solution.

19-20 and in conjunction with the portion of FIG. 7, the composition and assembly relationship of the first seal assembly 21 are depicted. The first seal assembly 21 includes a reducer sleeve device 25, a duckbill seal 107 and an upper retaining ring 106 that extend through the distal end 377 of the cannula. The reducer sleeve device 25 includes a reducer sleeve assembly 400, a lower cover plate 104, a lower housing 103a and a lower retaining ring 102. The sleeve 307 of the reducer sleeve assembly 400 is sheathed within and wrapped by the film sleeve 101. The lower retaining ring 102, the lower cover 104 and the lower housing 103a clamp the fixed reducer sleeve assembly 400.

Referring to Figures 8 and 24-25, the reducer sleeve assembly 400 includes first, second, and third valve sleeves 301 (302, 303) that can be assembled to form a sleeve 307 and wraps the first, first Second, the film sleeve 101 of the third valve sleeve 301 (302, 303). The reducer sleeve assembly 400 also includes a scroll drive mechanism 508 for driving the first, second, and third valve sleeves 301 (302, 303) for radial linear motion. The first, second, and third valve sleeves 301 (302, 303) are driven by the scroll drive mechanism 508 while performing a linear motion about the axis 1000 or a linear motion away from the axis 1000 in the radial direction. The scroll drive mechanism 508 includes a drive table 406, a gear turntable 404 and a turntable drive assembly 509 that drives the gear turntable 404 to rotate along the axis 1000 within the drive stage 406. The carousel drive assembly 509 includes a rack drive assembly 407 and a rack lock assembly 408. The rack drive assembly 407 is configured to drive the gear wheel 404 to rotate, and the rack lock assembly 408 is used to lock the rack 405 to linearly or lock the rack 405.

As shown in FIG. 25, the rack drive assembly 407 includes a rack 405, a rack drive button 471, a rack return spring 457, and a rack drive seal sleeve 475. Pressing the rack drive button 471, the driving rack 405 is linearly moved to further drive the gear turntable 404 to rotate along the axis 1000. After the pressing external force is removed, the rack 405 is under the action of the rack return spring 457. Implement a reset.

As shown in FIG. 25, the rack 405 includes a spring shaft 454 at its distal end, a connecting shaft 453 at its proximal end, and a rack body 450 connecting the spring shaft 454 and the connecting shaft 453. The front surface of the rack 405 includes a plurality of teeth 451 having parameters corresponding to the gear teeth 441 of the gear turntable 404. The tooth shape 451 meshes with the corresponding gear teeth 441 of the gear turntable 404, and the back surface includes several smaller pieces. The limiting slot 452 is disposed at an axially distal end to match the sliding slot 465 of the driving table 406 so that the rack 405 can slide back and forth along the sliding slot 465. The turntable 404 is substantially identical to the first embodiment of the gear turntable 304. It will be understood by those skilled in the art that the gear teeth 441 of the turntable 404 need only be matched with the gear 405 to match the worm 305. The teeth 341 of 304 are replaced with the teeth 441 that match the rack 405, and the other portions are unchanged. Compressing or releasing the rack return spring 457 can drive the rack 405 to slide along the sliding slot 465.

As shown in FIG. 25, the rack drive button 471 includes a proximal hemispherical button body 470, and the button body 480 is provided with a rod 472 distally, and a distal end of the rod 472 is provided with a positioning hole 473. The connecting shaft 453 of the rack 405 is inserted into the distal end of the rod 472 and the holes 473 (456) are aligned and fixed by pins 476.

As shown in Figures 25-26, the rack drive seal sleeve 475 includes a seal sleeve distal end 475a, a seal sleeve proximal end 475c and a seal sleeve 475b, the seal sleeve distal end 475a and the lower housing 103a mounting sleeve 139a. Adhesively secured, the seal sleeve proximal end 475c is adhesively secured to the proximal end of the stem 472 to ensure airtightness of the sleeve assembly 20 during compression and release of the rack drive assembly 407.

As shown in FIG. 25, the rack lock assembly 408 includes a limiter 493, a limiter return spring 482, a limiter drive button 481, and a seal ring 484 that fits over the limiter drive button 481. The stopper 493 is substantially V-shaped, and a distal end of the stopper 493 is provided with a limit hook 497. The stopper 493 is provided with a stopper hole 496 at a middle thereof and is rotatable about the rotation shaft 464, and the proximal end is provided with the sliding groove 495 and the shaft. The 492 is connected in a movable manner, and the distal end setting limit hook 497 is engaged with the limiting groove 452 of the rack 405 to achieve locking or release of the rack 405. The stopper drive button 481 includes a hemispherical button body 480. The button body 480 is provided with a hollow boss 487 at the distal end, and a positioning hole 486 is disposed at the boss 487. The stopper drive button 481 further includes a transmission shaft 491 fixedly coupled thereto. The connection transmission shaft 491 is provided with a positioning hole 491a at a proximal end thereof, and the proximal end of the transmission shaft 491 is inserted into the boss 487 and the hole 486 (491a) Align and lock with the fixing pin 485.

Under the force of the stopper return spring 482, the stopper button 481 pulls the stopper 493 to rotate along the stopper hole 496, so that the limit hook 497 automatically snaps into the back of the rack 405. The limiting slot 452 is configured to define a linear motion of the rack 405, and the stopper driving button 481 is pressed. At this time, the stopper button 481 pushes the stopper 493 to rotate in the opposite direction along the stopper hole 496. , the limit hook 497 is disengaged from the limiting slot 452, the rack 405 is de-defined, and linear motion can be performed;

As shown in FIG. 25, the drive table 406 includes a through hole 461 for passing the instrument and an annular body 460 defined therein, the through hole 461 being defined by a hole wall 462 that rotates around the hole wall 462. motion. The annular body 460 further includes an outer wall 467, and three drive table chutes 463 extending transversely through the outer wall 467 to the hole wall 462 and respectively mating with the first, second, and third guide rails 313 (323, 333). The driving table chute 463 is axially equally divided along the through hole 461, and the radial length dimension of the first, second, and third guide rails 313 (323, 333) is smaller than the radial length dimension of the driving table chute 463. . The outer side of the outer wall 467 extends laterally out of the sliding groove 465 and the rotating shaft 464 for mounting the rack 405. The shaft 464 is matched with the stopper hole 496 of the stopper 493, and the stopper 493 can be rotated around the rotation shaft 464 to release or lock the rack 405.

As shown in Figure 25, the lower housing 103a includes an aperture 131a that can be threaded into the reducer sleeve assembly 400, and the outer housing 130a and the first, second, and third valve sleeves 301 (302, 303) are expanded outwardly. Inner wall 135a. The hole 131a is defined by the hole wall 132a. The outer casing 130a is provided with a hole 136a for mounting the rack lock assembly 408, and a drive spring groove 137a is provided along the inner side of the hole 136a for mounting the rack return spring 457. The other side of the hole 136a of the outer casing 130a is provided with a hollow guide post 138a for mounting the rack drive assembly 407, and the guide post 138a extends outwardly to provide a hollow mounting sleeve 139a.

As shown in Figures 8 and 26-27, the approximate assembly process of the reducer sleeve device 25 includes:

The reducer cannula assembly 400 is mounted to first connect the first, second, and third petal cannula proximal ends 318 (328, 338) of the first, second, and third valve cannula 301 (302, 303) The fixed first, second, and third valve cannula drives 310 (320, 330) constitute a first, second, and third valve cannula 301 (302, 303), and then the first, second, and third valves The sleeves 301 (302, 303) are respectively inserted into the drive table chutes 463 corresponding to the drive table 406; then the turntable 404 and the rack 405 are respectively loaded into the corresponding positions in the drive table 306, so that The tooth profile 451 of the rack 405 is in meshing engagement with the gear teeth 441 of the turntable 404. The turntable scroll 343 of the turntable 404 and the first of the first, second and third valve sleeves 301 (302, 303) a second, third scroll groove 314 (324, 334) that matches the bite and adjusts the reducer sleeve assembly 400 to an initial state;

The reducer sleeve assembly 400 (the rack drive assembly 407 and the rack lock assembly 408, which are not equipped with the turntable drive assembly 509) is then loaded into the lower housing 103a, and the film sleeve 101 is sleeved by the sleeve 307. The distal end of the tube 377 is inserted and the distal end 377 of the cannula is exposed. Then, the drive shaft 491 of the rack lock assembly 408 is inserted into the outer side of the hole 136a and passed through the stopper return spring 482 to be fixed with the stopper drive button 481, and the seal ring 484 is fixed to the seal 483 by the gasket 483. The lower limiter return spring 482 is in a compressed state on the lower casing 103a; then the limiter 493 is movably connected to the distal end of the drive shaft 491, and the limiter 493 can be realized by pressing or releasing the stopper drive button 481. Release or locking with the rack 405; then the rod 472 of the rack drive assembly 407 is threaded through the guide post 138a and fixed with the pin 476 to the connecting shaft 453 of the rack 405, and the rack is driven The sealing sleeve distal end 475a of the sealing sleeve 475 is adhesively fixed to the mounting sleeve 139a of the lower housing 103a, and the sealing sleeve proximal end 475c is adhesively fixed to the proximal end of the rod 472. Finally, the lower fixing ring 102 is assembled to the lower housing 103a. The film sleeve 101 is sandwiched between the lower casing 103a and the lower fixing ring 102 to clamp and fix the fixing surface 113; the lower cover 104 and the lower casing 103a are interference-fitted to clamp the reducing sleeve assembly 400. Defining that the rack 405 and the turntable 404 cannot be axially positioned , The rack 405 along the horizontal axis 2000 can axially linear motion, along a longitudinal axis 404 of the turntable 1000 for rotational movement.

The variable diameter expansion process of the reducer sleeve assembly 25 is depicted in detail in Figures 27-30. Since the first, second, and third valve sleeves 301 (302, 303) of the film sleeve 101 of the present embodiment are the same as those of the first embodiment, the same portions as those of the first embodiment are not described, and only for the turntable 404 are different. The driving method is explained.

As shown in FIG. 27, in the initial state, the rack locking assembly 408 is tensioned by the stopper return spring 482 from the distal end to the left side, and the shaft 492 is at the left end. The proximal end 495a of the chute 495 of the stopper 493. The rack return spring 457 of the rack drive assembly 407 is slightly compressed. Under the elastic force, the rack 405 drives the limit tooth 45 to the right side, so that the limit hook 497 and the limit slot 452 are stressed. In the opposite direction, the limit hook 497 of the stopper 493 cooperates with the limiting slot 452 of the rack 405 to realize the firm locking of the rack 405 and cannot escape.

As shown in FIG. 28, in the unlocked state, the stopper driving button 481 of the rack locking assembly 408 is pressed inward, the stopper return spring 482 is compressed, and the transmission shaft 491 is moved from the proximal end to the distal end. The shaft 492 slides from the proximal end 495a of the chute 495 of the stopper 493 to the distal end 495b of the chute 495, pushing the stopper 493 to rotate in the opposite direction of the shaft 464 (counterclockwise rotation, FIG. 28 angle of view), The limit stop hook 497 is separated from the limit groove 452 of the rack 405.

As shown in FIG. 29, in the inflated state, the stopper driving button 481 is pressed inwardly to separate the limit hook 497 from the limiting groove 452 of the rack 405; and the rack is pressed with a finger on the other side. The rack drive button 471 of the drive assembly 407, the rod 472 of the rack drive assembly 407 drives the rack 405 to be displaced from the proximal end to the distal end (ie, from right to left), and the tooth profile 451 of the rack 405 drives the dial The teeth 441 of the 404 rotate counterclockwise, and the turntable 404 drives the first, second, and third scroll grooves 314 (324, 334) of the first, second, and third valve sleeves 301 (302, 303). Movement, due to the drive table chute 463 of the drive table 406, the second and third valve sleeves 301 (302, 303) move linearly outward in the drive table chute 363, the first Second, the first, second, and third valve bodies 316 (326, 336) of the third valve cannula 301 (302, 303) are inflated outwardly, and the tube body 113 of the membrane cannula 101 is first. Secondly, the third valve body 316 (326, 336) is swollen and expanded to expand outward. At this time, the finger pressing the stopper driving button 481 is released, so that the limit hook 497 locks the limiting slot 452. ,then When the rack drive button 471 is released, the expansion state operation is completed.

As shown in FIG. 30, during the actual operation of the surgery, it is more common to combine the unlocked state and the inflated state to perform the variable diameter process of the cannula assembly 20. By simultaneously pressing the stopper drive button 481 and the rack drive button 471, when the stopper 493 presses the stopper drive button 481, the limit hook 497 is separated from the limit groove 452 of the rack 405, and is pressed. The rack drive button 471 drives the rod 472 of the rack drive assembly 407 to drive the rack 405 from the proximal end to the distal end (ie, from right to left). The tooth shape 451 of the rack 405 drives the teeth of the dial 404. The 441 rotates counterclockwise along the hole wall 462. The surgeon can adjust the stroke of the pressing rack driving button 471 as needed. When the adjustment is in place, the finger of the stopper driving button 481 is released, so that the limiting hook 497 locks the limiting slot 452, and then releases the tooth. The strip drive button 471 performs the inflation state operation, and can also press or release the stopper drive button 481 and the rack drive button 471 at the same time.

When it is necessary to restore the sleeve assembly 20 to the initial state, it is only necessary to press the stopper drive button 481. When the stopper 493 presses the stopper drive button 481, the limit of the limit hook 497 and the rack 405 is limited. The bit slots 452 are separated. The compressed drive spring 494 releases the elastic force, causing the rack 405 to move from the distal end to the proximal end (to the right). The tooth shape 451 of the rack 405 drives the teeth 441 of the turntable 404 along the hole wall 462. The clockwise rotation is performed and the first, second, and third valve sleeves 301 (302, 303) are returned to the initial state.

It should be understood by those skilled in the art that both the present embodiment and the first embodiment can achieve locking at any position within the range of variable diameter expansion, that is, the sleeve assembly can be any diameter between 10 mm and 15 mm in diameter. Size adjustment. This method greatly facilitates the operation of the surgeon, and also avoids the secondary puncture or the additional damage caused by the puncture channel. It should be understood by those skilled in the art that the advantages and advantageous effects of the present embodiment are substantially the same as those of the first embodiment, and are not described herein. The reduced diameter sleeve assembly of the present invention employs three-and-a-half approximately symmetric first, second, and third valve sleeves to form a variable diameter sleeve assembly, and those skilled in the art will appreciate that four or more sleeves are employed. It is also within the scope of the invention to make up the variable diameter sleeve assembly.

Many different embodiments and examples of the invention have been shown and described. One of ordinary skill in the art can make adaptations to the methods and apparatus by appropriate modifications without departing from the scope of the invention. Several corrections have been mentioned, and other modifications are also conceivable to those skilled in the art. Therefore, the scope of the invention should be construed in the appended claims and the claims

Claims (10)

A chuck type reducer sleeve device comprising a reducer sleeve assembly, a lower cover plate and a lower casing, wherein the lower cover plate and the lower casing clamp and fix the reducer sleeve assembly, wherein: The reducer cannula assembly includes a first valve sleeve radially movable, a second valve sleeve, a third valve sleeve, and a membrane sleeve surrounding the first, second, and third valve sleeves, The first, second, and third valve sleeves are arranged in a circular shape along the longitudinal axis and form a hollow passage for receiving the surgical instruments in and out with the film sleeve; The reducer sleeve assembly further includes a scroll drive mechanism that drives the first, second, and third valve sleeves to move linearly along the longitudinal axis or a line away from the longitudinal axis motion. The reducer sleeve device according to claim 1, wherein said first, second, and third valve sleeves respectively comprise first, second, and third valve bodies, and first and second a first, a second, and a third valve cannula are coupled to the proximal end of the third valve body, and the first, second, and third valve cannula drives respectively include first, second, and third guide rails, and a first, second, and third scroll groove extending proximally. A reducing sleeve device according to claim 2, wherein said reducer sleeve assembly comprises an initial state and an expanded state: said first, second and third valve tubes in said initial state The body forms a transverse cross section having a substantially circular ring having a substantially inner diameter D1; and in the expanded state, the first, second and third valve bodies are radially moved away from the longitudinal axis to form a swollen ring The transverse section of the expanded ring has an inner diameter of D2 and D2 > D1. A reducer bushing apparatus according to claim 3, wherein said scroll drive mechanism comprises a drive table, a gear turntable and a turntable drive assembly for driving said gear turntable to rotate along a longitudinal axis. A bushing device according to claim 4, wherein said gear turntable includes a turbine ring body penetrating through holes, said outer circumference of said turbine ring being provided with teeth, a distal end face of said turbine ring body Providing a turntable scroll groove composed of a spiral, the turntable scroll groove is matched with the shape of the first, second, and third scroll grooves; The driving platform comprises an annular body having a through hole for the instrument to enter and exit, the annular body comprising a hole wall and an outer wall and a transverse through outer wall to the hole wall and respectively matched with the first, second and third guide rails a drive table chute, the drive table chute is equally divided along the axial direction of the instrument through hole, and the first, second, and third sleeve drives are driven along the drive table chute to be close to the longitudinal axis or away from the vertical axis The linear motion of the direction. A reducer bushing assembly according to claim 5, wherein said turntable drive assembly includes a worm engaged with said teeth, a worm drive hand wheel that interfaces with said worm, said worm including said The gear teeth of the gear turntable are matched with the wrap shape; the worm drive rotates the hand wheel to drive the worm to rotate, and further drives the gear turntable to perform axial rotation. A reducer bushing assembly according to claim 5, wherein said turntable drive assembly comprises a rack drive assembly and a rack lock assembly, said rack drive assembly for driving said gear turntable to rotate a rack locking assembly for locking or releasing the rack; the rack drive assembly comprising a rack, a rack drive button, a rack return spring and a rack drive seal, the rack front comprising a plurality of parameters a tooth shape conforming to the gear teeth on the gear turntable and engaging with the gear teeth, the back of the rack includes a plurality of limiting slots, pressing the rack drive button to drive the rack to perform linear motion, thereby further driving the gear shift The coil is rotated about the longitudinal axis; the rack drive button is released, and the rack is reset by the rack return spring. The reducer bushing assembly of claim 7 wherein said turntable drive assembly includes a limiter, a limiter return spring, a limiter drive button, and a seal that fits over the limiter drive button a limit, a limit hook and a stopper hole are disposed at a distal end of the stopper, and the stopper button pulls the limiter to rotate along the stopper hole under the force of the stopper return spring; The limit hook is automatically inserted into the limit slot on the back of the rack to define a linear motion of the rack; pressing the limiter drive button, the limit button pushes the limiter along the limiter hole In the reverse rotation, the limit hook is disengaged from the limiting slot, and the rack is de-defined. A reducing sleeve device according to claim 2, wherein said first, second, and third valve bodies are made of a metal material and formed by stamping once or by cutting a circular metal tube In three parts. A trocar comprising a cannula assembly and a puncture needle extending through the cannula assembly, wherein the cannula assembly comprises the reducer sleeve device of any of claims 1-9, the reducer sleeve device A lower retaining ring is further included, the lower and lower retaining rings clamping the fixed membrane sleeve, the sleeve assembly further comprising an upper retaining ring, the upper retaining ring sealingly fixing the duckbill to the cannula device The first seal assembly also includes a second seal assembly that is snap-fitted to the first seal assembly.

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