CN111419341A - Four-wire mesh basket structure and stone taking assembly comprising same - Google Patents
Four-wire mesh basket structure and stone taking assembly comprising same Download PDFInfo
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- CN111419341A CN111419341A CN202010358210.3A CN202010358210A CN111419341A CN 111419341 A CN111419341 A CN 111419341A CN 202010358210 A CN202010358210 A CN 202010358210A CN 111419341 A CN111419341 A CN 111419341A
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- 239000004575 stone Substances 0.000 title claims description 18
- 230000007704 transition Effects 0.000 claims abstract description 34
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 claims description 20
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 20
- 238000007493 shaping process Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 3
- 230000002040 relaxant effect Effects 0.000 abstract description 3
- 238000005452 bending Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 210000000056 organ Anatomy 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 2
- 238000002504 lithotomy Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 210000000626 ureter Anatomy 0.000 description 1
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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
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
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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
- A61B2017/0046—Surgical instruments, devices or methods, e.g. tourniquets with a releasable handle; with handle and operating part separable
- A61B2017/00469—Surgical instruments, devices or methods, e.g. tourniquets with a releasable handle; with handle and operating part separable for insertion of instruments, e.g. guide wire, optical fibre
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
- A61B2017/2212—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions having a closed distal end, e.g. a loop
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Orthopedic Medicine & Surgery (AREA)
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Abstract
The invention relates to a four-wire mesh basket structure, which comprises a basket root at the rear end, wherein four main wires are distributed at the front end of the basket root in a forward extending manner, and the front end of each main wire is forked to form two sub-wires; the front ends of the eight component mesh wires are converged at the top of the basket structure, the front ends of the adjacent component mesh wires which are branched from different main mesh wires are connected through arc-shaped transition sections, and the front ends of the four component mesh wires are correspondingly formed and put into the four arc-shaped transition sections to be spliced to form the top of the basket structure; the middle parts of the four main net wires are bulged outwards, the rear end parts are tightened at the root parts of the net baskets, and the front ends are spliced through arc-shaped transition sections to form the spherical net top. Such basket structure is opened more neatly when retrieving with more relaxing, does not have the sheath pipe that can more convenient receipts of the "little cap (the position of knoing)" of head, and this kind of structural design can make the basket specification accomplish littleer moreover.
Description
Technical Field
The invention relates to a four-wire mesh basket structure and a stone taking assembly comprising the same.
Background
The four-wire basket is applied to operation calculus removal operation in a large number now, and the basket top of current four-wire basket is fixed through the mode of knoing, and such structure is great because the size of the knot body of knoing has restricted the size of sheath pipe, can not further do the fineness with calculus removal subassembly. The prior art continues a basket rational in infrastructure, uses convenient four wire mesh basket structure and contains the subassembly of getting the stone of four wire mesh basket structures.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a four-wire basket structure which is reasonable in structure and convenient to use and a stone taking assembly comprising the four-wire basket structure.
The technical scheme of the invention is that a four-wire mesh basket structure is provided, which comprises a basket root at the rear end, wherein four main wires extend forwards from the front end of the basket root and are distributed on the front end of the basket root, and the front end of each main wire is forked to form two sub-wires; the front ends of the eight component mesh wires are converged at the top of the basket structure, the front ends of the adjacent component mesh wires which are branched from different main mesh wires are connected through arc-shaped transition sections, and the front ends of the four component mesh wires are correspondingly formed and put into the four arc-shaped transition sections to be spliced to form the top of the basket structure;
the middle parts of the four main net wires are bulged outwards, the rear end parts are tightened at the root parts of the net baskets, and the front ends are spliced through arc-shaped transition sections to form the spherical net top.
Such basket structure is opened more neatly when retrieving with more relaxing, does not have the sheath pipe that can more convenient receipts of the "little cap (the position of knoing)" of head, and this kind of structural design can make the basket specification accomplish littleer moreover.
Preferably, the openings of the four arc-shaped transition sections face outwards, the four arc-shaped transition sections are symmetrically or asymmetrically arranged relative to the central axis of the basket structure, and the outer edges of the adjacent arc-shaped transition sections are tangentially arranged. Due to the design, the top of the net basket has elasticity, and the bending resistance is further improved; the top structure of the net basket is more orderly; the symmetrical or asymmetrical design is determined according to the size of the crushed stones to be sleeved, and the asymmetrical design is more suitable for sleeving the crushed stones with larger sizes. Preferably symmetrically arranged, such a basket structure is more stable.
Preferably, an oval area is formed between two branch net wires which are branched from the same main net wire, and the branched end at the rear end and the closed end at the front end of the oval area are in smooth transition. Due to the design, the top of the net basket is more elastic, and the bending resistance is further improved.
Preferably, the root part of the basket is a main nickel-titanium tube, and the main mesh wire, the sub-mesh wire and the arc transition section are integrally formed with the nickel-titanium tube or formed by cutting and shaping the main nickel-titanium tube. Such design does benefit to processing convenience, and bulk strength is high, and the product size is good including geometric tolerance uniformity, and the basket owner net silk design degree of difficulty reduces the process and simplifies, and the main net silk presss from both sides the angle deviation size and depends on the mould precision height, the optimization contained angle precision that can be very big in theory.
Preferably, the net basket shaping angle can be reduced to below 70 degrees, and the net basket can benefit from the two-segment arc transition design of the net separating wires. The net basket reduces the bending angle of the net basket, improves the bending resistance and prolongs the service life.
Preferably, the front end of the root of the basket is branched into two secondary roots, and then each secondary root is branched into two main mesh wires. The four-wire basket is sleeved with the rotating basket to take stones, and the secondary root part with two sections of extensions is added at the root part of the basket, so that the strength and the rigidity of the root part of the basket are higher, the service life of the basket is prolonged, and most importantly, the handle end rotation and basket end synchronization performance are better, and stones are more conveniently sleeved and taken. Under the condition that the strength and the rigidity of the secondary root of the basket are improved, the secondary root of the basket can obtain a larger branching angle, the diameter of the maximum circle formed by the main net wires of the basket is further enlarged, and the baskets of the same type are larger and more advantageous in the diameter range of the stone taking.
Preferably, the push-pull wire comprises a push section at the rear section and a grinding conical section at the front end, the push section is a nickel-titanium wire, and the diameter range of the nickel-titanium wire at the push section is 0.25-0.35 mm; the diameter of the thinnest front end of the pushing section is 0.15-0.25mm, and the length of the pushing section is 120-180 mm. Due to the design, the pushing section is arranged to be the nickel-titanium wire, compared with the existing spring tube, the pushing performance of the whole wire at the position of the pushing section can be greatly improved due to the structure that the nickel-titanium wire of the pushing section is combined with the sheath tube, and the mesh basket can be more easily put in and taken out of the endoscope; the grinding conical section is designed to improve the passing performance of the whole wire at the position of the grinding conical section, and particularly, the grinding conical section can be easily opened when passing through an S-shaped bend, so that the grinding conical section can adapt to work in a complex cavity channel.
The sheath tube is made of PEEK or a braided tube; the mesh guide pipe is made of PTFE or PI; the fixing sleeve is made of PTFE. By the design, the quality of the wire can be improved.
A stone taking assembly comprising a four-wire basket structure comprises the four-wire basket structure and further comprises a sheath tube, wherein the four-wire basket structure slides in the sheath tube or is opened outside the sheath tube, a push-pull wire is connected in the sheath tube in a sliding mode, and the push-pull wire is connected with the root of a basket; the handle is characterized by further comprising a handle body, a push rod is connected to the handle body in a front-back sliding mode, a sheath tube fixing tube is arranged at the front end of the push rod, a push-pull wire fixing portion is arranged at the rear end of the handle body, the sheath tube penetrates through the sheath tube fixing tube, and the outer wall of the sheath tube is fixedly connected with the sheath tube fixing tube; the rear end of the push-pull wire is fixedly connected with the push-pull wire fixing part. By the design, the sheath tube and the push-pull wire can slide relatively, so that an operator can conveniently open and fold the three-wire basket and the sheath tube can pass through the ureter soft lens. The push-pull wire and the root of the basket are welded or connected and fixed through a heat shrink tube. By adopting the design, the stable first-to-first sliding between the push-pull wire and the sheath tube can be realized.
Preferably, the handle main body is tubular, and the side wall of the handle main body is provided with an installation groove; the handle is characterized in that a guide post is inserted in the handle main body, the outer wall of the guide post is provided with rotation limiting plates, and the rotation limiting plates are arranged in pairs and are respectively matched with notches at the rear end parts of the mounting grooves for limiting; the rear end part of the guide post is provided with a sliding limiting ring, notches are symmetrically formed in the sliding limiting ring, the sliding limiting ring is separated into sliding limiting sub-rings, and the front surface of each sliding limiting sub-ring is matched with the rear end surface of the corresponding mounting groove for limiting; the rear end of each sliding limiting sub-ring is provided with a push-pull wire clamping block, and the two push-pull wire clamping blocks are matched to clamp and fix the rear end of the push-pull wire. Such design can be through guide post and mounting groove cooperation to it is fixed to push away the wire rear end.
Preferably, the upper surface of the guide post is an arc-shaped surface, the push rod is provided with a sliding cover plate matched with the arc-shaped surface, and the sliding cover plate covers the arc-shaped surface and is matched with the arc-shaped surface to slide back and forth;
a sliding guide lug is convexly arranged on the arc-shaped surface, and a sliding groove matched with the sliding guide lug to slide is formed in the sliding cover plate; the upper surface of the sliding cover plate is convexly provided with a limiting convex edge, and the sliding groove is arranged in the limiting convex edge; the limiting convex edge is matched with the notch of the mounting groove for limiting; and push-pull inclined blocks are arranged outside the limiting convex ribs. By the design, the guide column and the push rod can be in sliding fit and limited.
Preferably, the rear ends of the rotation limiting plates and the adjacent sliding limiting sub-rings are integrally formed, and the front ends of the paired rotation limiting plates are provided with push rod limiting blocks; the rear end of the handle body is in threaded fit connection with a rear end cover, and the rear end cover covers the position of the push rod limiting block. By the design, the overall strength and the appearance attractiveness of the guide column are improved.
The invention has the advantages and beneficial effects that: such basket structure is opened more neatly when retrieving with more relaxing, does not have the sheath pipe that can more convenient receipts of the "little cap (the position of knoing)" of head, and this kind of structural design can make the basket specification accomplish littleer moreover.
Drawings
FIG. 1 is a perspective view of a basket mechanism of the present invention;
FIG. 2 is a side view of the basket mechanism of the present invention;
FIG. 3 is a top view of the basket mechanism of the present invention;
FIG. 4 is a front view of the basket mechanism of the present invention;
FIG. 5 is a schematic view of the overall structure of the stone removing assembly;
FIG. 6 is a cross-sectional structural view of the handle body;
FIG. 7 is an enlarged view of the structure at A in FIG. 6;
FIG. 8 is a perspective view of the handle body;
FIG. 9 is an exploded view of the handle body and other components;
FIG. 10 is an exploded view of the main body of the handle and other components (from another perspective);
fig. 11 is an exploded view (from another perspective) of the handle body and other components.
In the figure: 1. a sheath tube; 2. the root of the basket; 3. a main mesh; 4. pushing and drawing wires; 5. dividing the mesh; 6. an arc transition section; 7. an elliptical region; 8. a primary nickel titanium tube; 9. a pushing section; 10. grinding the conical section; 11. a handle body; 12. a push rod; 13. a sheath tube fixing tube; 14. a push-pull wire fixing part; 15. a threaded connection section; 16. protecting the front tube; 17. mounting grooves; 18. a guide post; 19. rotating the limiting plate; 20. sliding the limit sub-ring; 21. a notch; 22. a push-pull wire clamping block; 23. an arc-shaped surface; 24. a sliding cover plate; 25. a sliding guide projection; 26. a sliding groove; 27. a limiting convex rib; 28. pushing and pulling the inclined block; 29. a push rod limiting block; 30. a rear end cap; 31. a front connecting pipe; 32. a rear connecting pipe; 33. reinforcing ribs; 34. secondary roots.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
As shown in fig. 1 to 11, a four-wire basket structure includes a basket root 2 at a rear end, four main wires 3 are distributed at a front end of the basket root 2 in a forward extending manner, and a front end of each main wire 3 is forked to form two sub-wires 5; the front ends of the eight component mesh wires 5 are converged at the top of the basket structure, the front ends of the adjacent component mesh wires 5 which are branched from different main mesh wires 3 are connected through arc-shaped transition sections 6, and the front ends of the four component mesh wires 5 are correspondingly formed and are placed into the four arc-shaped transition sections 6 to be spliced to form the top of the basket structure;
the middle parts of the four main net wires 3 are bulged outwards, the rear end parts are tightened at the root parts 2 of the net baskets, and the front ends are spliced through arc-shaped transition sections 6 to form a spherical net top.
The openings of the four arc transition sections 6 face outwards, the four arc transition sections are symmetrically or asymmetrically arranged relative to the central axis of the basket structure, and the outer edges of the adjacent arc transition sections 6 are tangentially arranged (the arc transition sections 6 are not connected in contact).
An oval area 7 is formed between two branch net wires 5 which are branched from the same main net wire 3, and the branched end at the rear end and the closed end at the front end of the oval area 7 are in smooth transition.
The root part 2 of the basket is a main nickel-titanium tube 8, and the main mesh wire 3, the sub-mesh wires 5 and the arc transition section 6 are integrally formed with the nickel-titanium tube or formed by cutting and shaping the main nickel-titanium tube 8. The main mesh wire 3, the sub-mesh wires 5 and the arc transition section 6 are all made of nickel titanium.
The net basket shaping angle is reduced to be less than 70 degrees (the net basket shaping angle is the arc included angle corresponding to the arc transition section 6, such as R in figure 4).
The front end of the basket root 2 is first forked into two secondary roots 34, and then each secondary root 34 is forked into two main mesh wires 3.
When the mesh basket is used, the four-wire mesh basket structure is driven by the push-pull wire to retract into the sheath tube 1 or is opened outside the sheath tube 1, preferably, the root part 2 of the mesh basket is a main nickel-titanium tube 8, the main mesh wire 3, the branch mesh wires 5 and the arc-shaped transition section 6 are formed by cutting and shaping the main nickel-titanium tube 8, and a knotted cap is not arranged at the top of the mesh basket, so that the retracted size of the mesh basket is greatly reduced, the sheath tube can be further reduced, and the components can be refined;
when the front end of the push-pull wire 4 is pulled backwards, the basket structure retracts and is combined into a bundle (in a state of not taking stones), so that the endoscope and the organs can conveniently pass through;
the push-pull wire 4 comprises a push section 9 at the rear section and a grinding conical section 10 at the front end, the push section 9 is a nickel-titanium wire 5, the push section 9 keeps the hardness of part of wires (the push section 9 and a sheath tube 1 outside the push section 9) of the push section 9, the pushing performance of the wires is kept, the grinding conical section 10 can be sent to the position of a lithotomy organ, when the wires (the grinding conical section 10 and the sheath tube 1 outside the grinding conical section 10) of the grinding conical section 10 are at the position of the lithotomy organ, especially when passing through an S-shaped curve, the front section is thin and the rear section is thick, the wire can easily pass through the S-shaped curve, the basket is smoothly opened, the S-shaped curve can be adapted to work in a complex cavity channel, and the minimum diameter of the S-shaped curve which can pass through the push-pull wire is 10 mm;
when 4 front ends of push-and-pull silk promote forward, every basket structure is opened (memory metal design shape), the basket structure is lantern skeleton form, through the twist grip, it rotates to drive to push away wire 4, it drives basket structure cover and gets the rubble to push away wire 4, when rotating, the push-and-pull silk drives basket root 2, basket root 2 drives two times root 34, two times root 34 and then drive whole basket structure and rotate, because the linking design of two times root 34, basket root 2 intensity has been strengthened, make the torsion transmission faster, the rotatory and basket end synchronism performance of handle end is better.
Because the design of the arc transition section 6, the oval region 7 of this application for the basket is opened and is retracted the time stress concentration point position, turns into two stress points from traditional single stress point, and the differentiation has reduced the stress concentration problem, and stress concentration position structure for the rounding off design, in addition the basket set angle contracts and is less than 70, has reduced the requirement of the fatigue strength of buckling more, and both superpose mutually, make the anti rupture ability of basket improve greatly.
Example 2
A stone taking assembly comprising a four-wire basket structure comprises the four-wire basket structure in embodiment 1 and further comprises a sheath tube 1, wherein the four-wire basket structure slides in the sheath tube 1 or is opened outside the sheath tube 1, a push-pull wire 4 is connected in the sheath tube 1 in a sliding manner, and the push-pull wire 4 is connected with the root of the basket; the sheath tube fixing device is characterized by further comprising a handle main body 11, a push rod 12 is connected to the handle main body 11 in a front-back sliding mode, a sheath tube fixing tube 13 is arranged at the front end of the push rod 12, a wire pushing and drawing fixing portion 14 is arranged at the rear end of the handle main body 11, the sheath tube 1 penetrates through the sheath tube fixing tube 13, and the outer wall of the sheath tube 1 is fixedly connected with the sheath tube fixing tube 13; the rear end of the push wire 4 is fixedly connected with a push wire fixing part 14. The rear part of the sheath tube fixing tube 13 is provided with a threaded connection section 15, and the threaded connection section 15 is connected with a protection front tube 16 in a matching manner. The push-pull wire 4 comprises a push section 9 at the rear section and a grinding conical section 10 at the front end, wherein the push section 9 is a nickel-titanium wire 5, and the diameter range of the nickel-titanium wire of the push section 9 is 0.25-0.35 mm; the diameter of the thinnest front end of the grinding conical section 10 is 0.15-0.25mm, and the length of the pushing section is 120-180 mm. The length of the pushing section 9 is preferably 1000mm or more;
the sheath tube 1 is made of PEEK or a braided tube.
The handle main body 11 is tubular, and the side wall of the handle main body is provided with an installation groove 17; a guide post 18 is inserted in the handle main body 11, rotation limiting plates 19 are arranged on the outer wall of the guide post 18, and the rotation limiting plates 19 are arranged in pairs and are respectively matched with the notches at the rear end parts of the mounting grooves 17 for limiting; the rear end part of the guide post 18 is provided with a sliding limiting ring, notches 21 are symmetrically formed in the sliding limiting ring, the sliding limiting ring is separated into a sliding limiting sub-ring 20, and the front surface of the sliding limiting sub-ring 20 is matched with the rear end surface of the mounting groove 17 for limiting; the rear end of each sliding limiting sub-ring 20 is provided with a push-pull wire clamping block 22, and the two push-pull wire clamping blocks 22 are matched to clamp and fix the rear end of the push-pull wire 4.
The upper surface of the guide column 18 is an arc-shaped surface 23, the push rod 12 is provided with a sliding cover plate 24 matched with the arc-shaped surface 23, and the sliding cover plate 24 covers the arc-shaped surface 23 and is matched with the arc-shaped surface 23 to slide back and forth; the cross section of the guide post 18 is C-shaped, and an elastic clamping space is formed by gaps among the push-pull wire clamping blocks 22, gaps 21 among the sliding limiting sub-rings 20 and intervals among the rotating limiting plates 19; after the rear end cover 30 is in threaded fit with the rear end of the handle body 11, the push-pull wire clamping block 22 can be restrained to clamp the rear connecting pipe 32. The bottom of the guide post 18 is further provided with a reinforcing rib 33, the reinforcing rib 33 is arranged on the front side of the sliding limiting sub-ring 20, and the C-shaped opening of the cross section of the guide post 18 is connected with the rib to ensure the resilience strength of the elastic clamping space.
A sliding guide convex block 25 is convexly arranged on the arc-shaped surface 23, and a sliding groove 26 which is matched with the sliding guide convex block 25 to slide is formed on the sliding cover plate 24; the upper surface of the sliding cover plate 24 is convexly provided with a limiting convex rib 27, and the sliding groove 26 is arranged in the limiting convex rib 27; the limiting convex ridge 27 is matched with the notch of the mounting groove 17 for limiting; and a push-pull inclined block 28 is arranged outside the limiting convex rib 27.
The rear ends of the rotation limiting plates 19 and the adjacent sliding limiting sub-rings 20 are integrally formed, and the front ends of the paired rotation limiting plates 19 are provided with push rod limiting blocks 29; the rear end of the handle body 11 is in threaded fit connection with a rear end cover 30, and the rear end cover 30 covers the position of the push rod limiting block 29.
When the sheath tube is used, the rear end of the sheath tube 1 penetrates through the sheath tube fixing tube 13 and the guide column 18 to the front end of the push-pull wire clamping block 22, and the push-pull wire 4 extends out of the rear end of the sheath tube 1 and is matched with the two push-pull wire clamping blocks 22 to be clamped and fixed; the sheath tube fixing tube 13 and the front connecting tube 31 are integrally formed, the front connecting tube 31 (the material of the front connecting tube 31 is PET) and the outer wall of the sheath tube 1 are fixed in a heat shrinkage mode, the push-pull wire 4 is fixedly provided with a rear connecting tube 32 (the material of the rear connecting tube 32 is 304 stainless steel tube or PET heat shrinkage tube) from the rear end of the sheath tube 1, and the push-pull wire clamping block 22 is matched to clamp and fix the rear connecting tube 32;
when the push-pull inclined block 28 drives the push rod 12 to slide forwards, the push rod 12 drives the sheath tube 1 to slide forwards relative to the push-pull wire 4, and the net basket is tightened; when the push-pull inclined block 28 drives the push rod 12 to slide backwards, the push rod 12 drives the sheath tube 1 to slide backwards relative to the push-pull wire 4, and the basket is opened.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the technical principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the invention.
Claims (10)
1. A four-wire mesh basket structure, its characterized in that: the net basket comprises a net basket root part at the rear end, wherein four main net wires extend forwards from the front end of the net basket root part, and the front end of each main net wire is forked to form two sub-net wires; the front ends of the eight component mesh wires are converged at the top of the basket structure, the front ends of the adjacent component mesh wires which are branched from different main mesh wires are connected through arc-shaped transition sections, and the front ends of the four component mesh wires are correspondingly formed and put into the four arc-shaped transition sections to be spliced to form the top of the basket structure;
the middle parts of the four main net wires are bulged outwards, the rear end parts are tightened at the root parts of the net baskets, and the front ends are spliced through arc-shaped transition sections to form the spherical net top.
2. The four wire mesh basket structure of claim 1, wherein: the openings of the four arc transition sections face outwards, the four arc transition sections are symmetrically or asymmetrically arranged relative to the central axis of the basket structure, and the outer edges of the adjacent arc transition sections are tangentially arranged.
3. The four wire mesh basket structure of claim 1, wherein: an oval area is formed between two branch net wires which are branched from the same main net wire, and the branch end at the rear end and the closing end at the front end of the oval area are in smooth transition.
4. A four wire mesh basket structure as defined in claim 1 or 3, wherein: the root part of the basket is a main nickel-titanium tube, and the main mesh wire, the sub-mesh wires and the arc transition section are integrally formed with the nickel-titanium tube or formed by cutting and shaping the main nickel-titanium tube.
5. The four wire mesh basket structure of claim 1, wherein: the net basket shaping angle is reduced to be less than 70 degrees.
6. The four wire mesh basket structure of claim 1, wherein: the front end of the root of the basket is branched into two secondary roots, and then each secondary root is branched into two main net wires.
7. A stone removal assembly comprising a four-wire basket structure, characterized in that: the four-wire basket structure of claims 1 to 6, further comprising a sheath tube, wherein the basket structure slides in or opens out of the sheath tube, a push-pull wire is connected in the sheath tube, and the push-pull wire is connected with the root of the basket; the handle is characterized by further comprising a handle body, a push rod is connected to the handle body in a front-back sliding mode, a sheath tube fixing tube is arranged at the front end of the push rod, a push-pull wire fixing portion is arranged at the rear end of the handle body, the sheath tube penetrates through the sheath tube fixing tube, and the outer wall of the sheath tube is fixedly connected with the sheath tube fixing tube; the rear end of the push-pull wire is fixedly connected with the push-pull wire fixing part.
8. The stone retrieval assembly comprising a four wire basket structure of claim 7, wherein: the handle main body is tubular, and the side wall of the handle main body is provided with an installation groove; the handle is characterized in that a guide post is inserted in the handle main body, the outer wall of the guide post is provided with rotation limiting plates, and the rotation limiting plates are arranged in pairs and are respectively matched with notches at the rear end parts of the mounting grooves for limiting; the rear end part of the guide post is provided with a sliding limiting ring, notches are symmetrically formed in the sliding limiting ring, the sliding limiting ring is separated into sliding limiting sub-rings, and the front surface of each sliding limiting sub-ring is matched with the rear end surface of the corresponding mounting groove for limiting; the rear end of each sliding limiting sub-ring is provided with a push-pull wire clamping block, and the two push-pull wire clamping blocks are matched to clamp and fix the rear end of the push-pull wire.
9. The stone retrieval assembly comprising a four wire basket structure of claim 8, wherein: the upper surface of the guide post is an arc-shaped surface, the push rod is provided with a sliding cover plate matched with the arc-shaped surface, and the sliding cover plate covers the arc-shaped surface and is matched with the arc-shaped surface to slide back and forth;
a sliding guide lug is convexly arranged on the arc-shaped surface, and a sliding groove matched with the sliding guide lug to slide is formed in the sliding cover plate; the upper surface of the sliding cover plate is convexly provided with a limiting convex edge, and the sliding groove is arranged in the limiting convex edge; the limiting convex edge is matched with the notch of the mounting groove for limiting; and push-pull inclined blocks are arranged outside the limiting convex ribs.
10. The stone retrieval assembly comprising a four wire basket structure of claim 9, wherein: the rear ends of the rotating limit plates and the adjacent sliding limit sub-rings are integrally formed, and the front ends of the paired rotating limit plates are provided with push rod limit blocks; the rear end of the handle body is in threaded fit connection with a rear end cover, and the rear end cover covers the position of the push rod limiting block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010358210.3A CN111419341A (en) | 2020-04-29 | 2020-04-29 | Four-wire mesh basket structure and stone taking assembly comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010358210.3A CN111419341A (en) | 2020-04-29 | 2020-04-29 | Four-wire mesh basket structure and stone taking assembly comprising same |
Publications (1)
| Publication Number | Publication Date |
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| CN111419341A true CN111419341A (en) | 2020-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010358210.3A Pending CN111419341A (en) | 2020-04-29 | 2020-04-29 | Four-wire mesh basket structure and stone taking assembly comprising same |
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| CN (1) | CN111419341A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115040198A (en) * | 2022-06-27 | 2022-09-13 | 广东斐尔医疗科技有限公司 | Rotary stone-taking basket |
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