CN114795434B - Snare for fetching matter in blood vessel - Google Patents

Abstract

The invention discloses a snare for fetching objects in a blood vessel, which comprises a snare wire drawing roll and a fixed length retracting device for retracting the snare wire drawing roll, wherein the fixed length retracting device comprises a fixed base, the top of the fixed base is provided with a fixed upright post, one end of the fixed upright post, which is far away from the fixed base, is rotatably connected with a movable upright post, one end of the movable upright post, which is far away from the fixed upright post, is fixedly connected with a lifting mechanism, the front end of the lifting mechanism is fixedly connected with a machine shell, and the snare wire drawing roll is fixed in the machine shell; according to the invention, the clamping device is arranged, when the snare drawn wires with required length are drawn out, the fixed handle can be pulled, the fixed handle can drive the driven rod to press the snare drawn wires through the driving rod and the stress rod, the movable upright post can rotate relative to the fixed upright post through the arrangement of the movable upright post, so that the angle of the shell is adjusted, the height of the shell can be adjusted through the arrangement of the lifting mechanism, and the use requirements of different patients and different environments can be met.

Description

Snare for fetching matter in blood vessel

Technical Field

The invention relates to the technical field of medical instruments, in particular to a snare for fetching materials in a blood vessel.

Background

With the continuous popularization and promotion of cardiovascular interventional diagnosis and treatment technologies and the wide application of intravascular implant technologies such as central venous catheters, venous transfusion harbors, PICCs and the like, the problems of breakage and catheter falling of interventional instruments in the diagnosis and treatment processes occur occasionally, foreign matters are easy to generate in blood vessels of patients after trauma, and need to be taken out at the moment, so that the health of the bodies of the patients is guaranteed.

Chinese patent 'CN 209074824U' discloses an endoscope foreign body snare with a locking function, wherein an upper pull rod and a lower pull rod are fixedly connected through a transition conical surface, and the upper pull rod and the lower pull rod penetrate through a locking rubber ring fixedly arranged in a handheld sleeve; the lower end of the hand-held sleeve is fixedly connected with a soft sleeve, the two ends of the drawn wire are fixedly connected with the lower end of the lower pull rod, the middle part of the drawn wire penetrates through the interior of the soft sleeve, the middle part of the drawn wire is also provided with a fetching rubber sleeve, and the fetching rubber sleeve is arranged outside the end part of the soft sleeve; the aperture of the through hole on the locking rubber ring is smaller than the outer diameter of the upper pull rod.

Chinese patent "CN 204655098U" discloses "snare with foreign matter pincers" including net type binding clip, electricity circle, protecting tube, transition joint, electricity circle handle and foreign matter pincers handle, the end of net type binding clip and electricity circle all is connected with the cable, and the cable that net type binding clip links to each other is connected to foreign matter pincers handle, and the cable that the electricity circle links to each other is connected with the sliding ring on the electricity circle handle, sets up the protecting tube outside the cable, has two lumens in the protecting tube, and protecting tube trailing end connection transition joint, transition joint connect foreign matter pincers handle and electricity circle handle respectively through two connecting pipes.

Chinese patent "CN 213047157U" discloses "get thing in blood vessel and use snare", the device include the grab handle, get thing pipe, wire drawing, the ring lantern ring and anticreep buckle, the inside cavity of grab handle, get the thing pipe with the inside intercommunication of grab handle, the grab handle is kept away from the one end of getting the thing pipe has been seted up and has been drawn the mouth, the wire drawing in get the thing pipe and keep away from the one end of grab handle penetrates, and passes get the thing pipe with the inside back of grab handle in draw the mouth to wear out, the snare ring is solid to be in penetrating of wire drawing the one end of getting the thing pipe, the anticreep buckle includes spring and dop, the one end of spring with the wire drawing rigid coupling, the dop rigid coupling is in the spring is kept away from the one end of wire drawing, the card hole has been seted up on the grab handle.

However, the pull wires or the pull cables in the above applications are all of fixed length, and although the adjustment can be shortened through manual adjustment, when a longer snare pull wire is needed, the pull wire is not suitable for use, if each pull wire is too long, waste is caused, and the use cost of a user is increased; based on this, there is a need for a snare for intravascular access that solves the above-mentioned problems.

Disclosure of Invention

The snare for fetching objects in a blood vessel is provided to solve the defects in the prior art, and the snare for fetching objects in the blood vessel can be pulled out at each time when a snare wire with a required length is pulled out, the fixed handle can drive the driven rod to press the snare wire through the driving rod and the stress rod, the snare wire can be stopped, and then the snare wire can be conveniently retracted; by arranging the clamping device, when the snare drawn wires with required length are drawn out at each time, the fixed handle can be pulled, the fixed handle can drive the driven rod to press the snare drawn wires through the driving rod and the stress rod, the snare drawn wires can be stopped, and then the snare drawn wires can be conveniently stored and released.

The invention provides a snare for fetching objects in a blood vessel, which comprises a snare wire drawing coil and a fixed length retracting device for retracting the snare wire drawing coil, wherein the fixed length retracting device comprises a fixed base, a fixed upright post is arranged at the top of the fixed base, one end of the fixed upright post, which is far away from the fixed base, is rotatably connected with a movable upright post, one end of the movable upright post, which is far away from the fixed upright post, is fixedly connected with a lifting mechanism, the front end of the lifting mechanism is fixedly connected with a machine shell, and the snare wire drawing coil is fixed in the machine shell;

a roller is arranged in the machine shell, the snare wire drawing coil is wound on the surface of the roller, a limiting roller is arranged on one side of the roller, two guide rollers are arranged on one side, away from the roller, of the limiting roller, the two guide rollers are oppositely arranged, one side, away from the limiting roller, of each guide roller is provided with an outlet, the side wall of the machine shell is provided with an outlet, and the snare wire drawing coil passes through the limiting roller, penetrates through the guide rollers and extends out of the outlet;

and the bottom of the limiting roller and the inner cavity of the shell are provided with clamping devices, the clamping devices are used for clamping the ring sleeve wire drawing rolls, the top of the outlet is provided with a winding and unwinding device, and the winding and unwinding device is used for winding and unwinding the ring sleeve wire drawing rolls.

Preferably, the lifting mechanism comprises a fixed plate, a movable plate is arranged at the rear end of the fixed plate, the movable plate is connected with the fixed plate in a sliding manner, and the machine shell is fixed at the top of the movable plate.

Preferably, the rear end of the fixed plate is fixedly connected with a slide rail, the movable plate penetrates through the space between the slide rail and the fixed plate, the inner cavity of the slide rail is provided with a driving gear, the driving gear is connected with the slide rail in a sliding manner, the rear end of the movable plate is distributed with limiting columns meshed with the driving gear in an array manner, and the driving gear is used for driving the movable plate to slide up and down.

Preferably, a limiting slide block is arranged at the center of the surface of the driving gear, the limiting slide block penetrates through the driving gear and extends towards two ends of the driving gear, a first sliding groove matched with the limiting slide block is formed in the rear side of the movable plate, the driving gear is movably connected with the movable plate through the limiting slide block, a second sliding groove matched with the limiting slide block is formed in the surface of the sliding rail, and the driving gear is connected with the sliding rail in a sliding mode through the limiting slide block.

Wherein, preferentially, clamping device includes the driven lever, and the rear end of driven lever is provided with first pivot, and the driven lever rotates with the casing through first pivot and links to each other, and the one end activity that the driven lever is close to first pivot links to each other has the actuating lever, and the one end stationary phase that the driven lever was kept away from to the actuating lever even has fixed handle, and the lateral wall of casing is seted up with fixed handle matched with arc wall, and actuating lever drive driven lever rotates and lets the driven lever hug closely in the surface of spacing roller.

Wherein, it is preferred, the surface of driven lever is provided with the atress pole, the one end that the atress pole is close to the driven lever is provided with the second pivot, and the atress pole rotates with the driven lever through the second pivot and links to each other, the movable slot has been seted up on the surface of atress pole, it links to each other to slide in the movable slot has the atress slider, one side of atress slider is provided with reset spring, and the atress slider passes through reset spring and links to each other with the atress pole, the surface of atress slider is provided with the third pivot, and the actuating lever rotates with the atress slider through the third pivot and links to each other, the surperficial center department of actuating lever is provided with the fourth pivot, and the actuating lever rotates with the casing through the fourth pivot and links to each other.

Wherein, preferentially, the both ends of arc wall and the equal stationary phase of inside wall of casing even have first pin, and the one end that the actuating lever is close to fixed handle is located between two first pin, keeps away from the fixed second pin that links with of inside wall of one end and the casing of first pivot at the driven lever.

Preferably, the retraction device comprises a scraping block, the top of the outlet is provided with a notch matched with the scraping block, the top of the scraping block is fixedly connected with a hanging plate, the scraping block is connected with the casing in a sliding mode through the hanging plate, the top of the hanging plate is provided with a push plate, a connecting rod is arranged between the push plate and the hanging plate, and the push plate is used for pushing the hanging plate to slide up and down.

Wherein, it is preferred that, be provided with limit baffle between push pedal and the hanger plate, limit baffle is fixed in the inside wall of casing, and limit baffle is run through to the connecting rod, and the surface cover of connecting rod is equipped with limit spring between limit baffle and hanger plate, and the hanger plate passes through limit spring and limit baffle links to each other, and the top of push pedal is provided with the cam, and the cam rotates with the casing through fixed rotating shaft and links to each other, and the cam hugs closely in the surface of push pedal.

Compared with the prior art, the snare wire drawing coil is wound on the roller through the fixed-length winding and unwinding device provided with the retractable snare wire drawing coil, the snare wire drawing can extend outwards from the outlet, and can be fixed by the scraping block after reaching a certain length, so that the snare wire drawing coil can be freely wound and unwound according to the requirements of a user, the snare wire drawing coil is convenient to use, and the waste of resources can be reduced as much as possible;

according to the invention, the clamping device is arranged, so that when the snare drawn wires with the required length are drawn out, the fixed handle can be pulled, the fixed handle can drive the driven rod to tightly press the snare drawn wires through the driving rod and the stress rod, the snare drawn wires can be stopped, and then the snare drawn wires can be conveniently stored and released;

the movable stand column is arranged, the movable stand column can rotate relative to the fixed stand column, so that the angle of the shell can be adjusted, the lifting mechanism is arranged, the height of the shell can be adjusted, the use requirements of different patients and different environments can be met, and the application range is widened.

In the working process, firstly, the snare drawn wire coil is wound on the roller wheel, then, when the snare drawn wire coil is used, the angle of the whole machine shell can be rotated through the movable stand column, and through the lifting mechanism, namely through the rotation of the driving gear, the teeth on the side wall of the driving gear can roll along the limiting columns, so that the movable plate can slide up and down between the fixed plates, the height of the machine shell can be adjusted, and a user can conveniently catch the snare drawn wire; when the snare wire drawing is needed, the guide roller is rotated, the guide roller can drive the snare wire drawing to stretch out from an outlet, after the length needed by the snare wire drawing is stretched, the fixed handle is pulled, the fixed handle is enabled to rotate along the arc-shaped groove, the driven rod can be driven to deflect towards the limiting roller through the driving rod and the stress rod, then the snare wire drawing is fixed and clamped, then the cam can be started, when the cam rotates, when the protruding end of the cam faces downwards, the push plate can be pushed to move downwards, the push plate can push the hanging plate downwards through the connecting rod, the snare wire drawing is enabled to be fixed through the scraping block, and then after the protruding end of the cam upwards rotates, the hanging plate can upwards move under the elastic action of the limiting spring and can return to the original shape.

Drawings

FIG. 1 is an isometric view of the overall structure of the present invention;

FIG. 2 is a schematic view of the lift mechanism of the present invention;

FIG. 3 is a schematic view of the internal structure of the housing of the present invention;

FIG. 4 is a schematic view of the structure of the clamping device of the present invention;

fig. 5 is a schematic structural view of the retracting device of the present invention.

Description of the reference numerals:

the mark in the figure is: 1. looping and drawing a wire coil; 2. a fixed base; 3. fixing the upright post; 4. a movable upright post; 5. a lifting mechanism; 51. a fixing plate; 52. a movable plate; 521. a limiting column; 522. a first chute; 53. a slide rail; 531. a second chute; 54. a driving gear; 55. a limiting slide block; 6. a housing; 60. an arc-shaped slot; 61. a roller; 62. a limiting roller; 63. a guide roller; 64. an outlet; 7. a clamping device; 71. a driven lever; 711. a first rotating shaft; 72. a force-bearing rod; 721. a second rotating shaft; 73. a stressed slider; 74. a return spring; 75. a drive rod; 751. a third rotating shaft; 752. a fourth rotating shaft; 76. fixing a handle; 77. a first bar; 78. a second bar; 8. a retracting device; 81. scraping off the block; 82. a hanger plate; 83. a limit baffle; 84. pushing the plate; 85. a connecting rod; 86. a limiting spring; 87. a cam.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different objects and not for describing a particular order.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein may be combined with other embodiments.

The existing equipment has fixed-length wire drawing, although the wire drawing can be shortened and adjusted by manual adjustment, when longer snare wire drawing is needed, the wire drawing is not suitable for use, if each wire drawing is designed to be overlong, waste is caused, and the use cost of a user is increased; based on this, there is a need for a snare for intravascular access that solves the above-mentioned problems.

In the working process, by rotating the cam 87, when the protruding end of the cam 87 faces downwards, the push plate 84 can be pushed to move downwards, the push plate 84 can push the hanging plate 82 downwards through the connecting rod 85, the snare wire is fixed by the scraping block 81, and adsorbed objects on the surface of the snare wire are scraped, so that the snare wire is prevented from being contaminated by foreign objects, the next use is facilitated, and then after the protruding end of the cam 87 rotates upwards, the hanging plate 82 can move upwards under the elastic action of the limiting spring 86 and returns to the original shape, and the winding and unwinding actions are completed.

Example 1

The embodiment of the invention comprises the following steps: as shown in figure 1, a snare for fetching objects in blood vessels comprises a snare wire drawing roll 1 and a fixed length retracting device for retracting the snare wire drawing roll 1, wherein the fixed length retracting device comprises a fixed base 2, a fixed upright post 3 is arranged at the top of the fixed base 2, one end, far away from the fixed base 2, of the fixed upright post 3 is rotatably connected with a movable upright post 4, the movable upright post 4 can rotate relative to the fixed upright post 3 so as to adjust the angle, one end, far away from the fixed upright post 3, of the movable upright post 4 is fixedly connected with a lifting mechanism 5, the front end of the lifting mechanism 5 is fixedly connected with a machine shell 6, the lifting mechanism 5 can drive the machine shell 6 to slide up and down so as to adapt to users with different heights, the snare wire drawing roll 1 is fixed in the machine shell 6, the snare wire drawing roll 1 can extend outwards from the machine shell 6 and can be fixed after extending to a required length, therefore, the snare drawn wires with corresponding lengths can be obtained as required, the waste of resources is prevented, meanwhile, the excessive snare drawn wires are prevented from being exposed in the external environment, the use safety of a user is guaranteed, the snare drawn wires are convenient to fold and unfold, and the workload of medical staff is also reduced.

It should be noted that, in the application, one end of the snare wire drawing is fixedly connected with the fetching snare for the snare device, the snare device is in the prior art, the type of the snare device is not limited, and the telescopic protection hard tube is sleeved outside the wire drawing and used for correcting the shape of the snare wire drawing, so that the snare wire drawing is prevented from being bent, and the fetching is guaranteed to be smoothly carried out.

Example 2

The embodiment of the invention comprises the following steps: as shown in fig. 3, a roller 61 is arranged in the machine case 6, the snare wire drawing roll 1 is wound on the surface of the roller 61, a plurality of limiting rollers 62 are arranged on one side of the roller 61, two guide rollers 63 are arranged on one side of the limiting roller 62 farthest from the roller 61, the two guide rollers 63 are arranged oppositely, the guide rollers 63 can be used for conveying snare wires, an outlet 64 is formed in one side of each guide roller 63 far away from the limiting roller 62 and in the side wall of the machine case 6, and the snare wire drawing roll 1 passes through the limiting rollers 62, penetrates through the guide rollers 63 and extends out of the outlet 64;

the bottom of the limiting roller 62 and the inner cavity of the machine shell 6 are provided with clamping devices 7, after the snare wire with the required length extends out, the clamping devices 7 can clamp the snare wire drawing roll 1 to prevent redundant snare wire drawing from extending out, the top of the outlet 64 is provided with a winding and unwinding device 8, and after the clamping devices 7 clamp the snare wire drawing, the winding and unwinding device 8 is used for winding and unwinding the snare wire drawing.

In the working process, firstly, the machine shell 6 is adjusted according to the height and the position of a user, the movable stand column 4 is rotated to adjust the angle of the movable stand column, the machine shell 6 is adjusted in height through the lifting mechanism 5, when the snare wire drawing is needed, the guide roller 63 can drive the snare wire drawing to extend outwards from the outlet by rotating the guide roller 63, and after the length is reached, the snare wire drawing is fixedly clamped by the clamping device 7 and then is wound and unwound through the winding and unwinding device 8.

Example 3

The embodiment of the invention comprises the following steps: specifically, as shown in fig. 2, the lifting mechanism 5 includes a fixed plate 51, a movable plate 52 is disposed at a rear end of the fixed plate 51, the movable plate 52 can slide up and down in the fixed plate 51, and the housing 6 is fixed at a top of the movable plate 52, so that when the movable plate 52 slides, a height of the housing 6 can be adjusted;

a slide rail 53 is fixedly connected to the rear end of the fixed plate 51, the movable plate 52 penetrates through the space between the slide rail 53 and the fixed plate 51, a driving gear 54 is arranged in an inner cavity of the slide rail 53, the driving gear 54 is connected with the slide rail 53 in a sliding manner, limiting columns 521 meshed with the driving gear 54 are distributed at the rear end of the movable plate 52 in an array manner, and the driving gear 54 is used for driving the movable plate 52 to slide up and down;

the limiting slide block 55 is arranged at the center of the surface of the driving gear 54, the limiting slide block 55 penetrates through the driving gear 54 and extends towards two ends, a first sliding groove 522 matched with the limiting slide block 55 is formed in the rear side of the movable plate 52, the driving gear 54 is movably connected with the movable plate 52 through the limiting slide block 55, a second sliding groove 531 matched with the limiting slide block 55 is formed in the surface of the sliding rail 53, and the driving gear 54 is connected with the sliding rail 53 in a sliding mode through the limiting slide block 55.

During operation, by rotating the driving gear 54, the driving gear 54 rotates along the position-limiting post 521, so that the movable plate 52 slides up and down along the fixed plate 51, the driving gear 54 slides in the first sliding slot 522 through the position-limiting slider 55, and when the end of the first sliding slot 522 is reached, the driving gear 54 slides left and right on the slide rail 53 along the second sliding slot 531 through the position-limiting slider 55.

Example 4

The embodiment of the invention comprises the following steps: as shown in fig. 4, the clamping device 7 includes a driven rod 71, a first rotating shaft 711 is disposed at a rear end of the driven rod 71, the driven rod 71 is rotatably connected to the housing 6 through the first rotating shaft 711, one end of the driven rod 71 close to the first rotating shaft 711 is movably connected to a driving rod 75, one end of the driving rod 75 far away from the driven rod 71 is fixedly connected to a fixed handle 76, an arc-shaped groove 60 matched with the fixed handle 76 is formed in a side wall of the housing 6, and the driving rod 75 drives the driven rod 71 to rotate and enables the driven rod 71 to be tightly attached to the surface of the limiting roller 62;

the surface of the driven rod 71 is provided with a stress rod 72, one end of the stress rod 72 close to the driven rod 71 is provided with a second rotating shaft 721, the stress rod 72 is rotatably connected with the driven rod 71 through the second rotating shaft 721, the surface of the stress rod 72 is provided with a movable groove, a stress slider 73 is slidably connected in the movable groove, one side of the stress slider 73 is provided with a return spring 74, the stress slider 73 is connected with the stress rod 72 through the return spring 74, the surface of the stress slider 73 is provided with a third rotating shaft 751, a driving rod 75 is rotatably connected with the stress slider 73 through the third rotating shaft 751, the center of the surface of the driving rod 75 is provided with a fourth rotating shaft 752, and the driving rod 75 is rotatably connected with the machine shell 6 through the fourth rotating shaft 752;

the two ends of the arc-shaped groove 60 and the inner side wall of the housing 6 are fixedly connected with first blocking rods 77, one end of the driving rod 75 close to the fixed handle 76 is located between the two first blocking rods 77, and one end of the driven rod 71 far away from the first rotating shaft 711 and the inner side wall of the housing 6 are fixedly connected with second blocking rods 78.

In the working process, the fixed handle 76 is pulled to rotate the fixed handle 76 along the arc-shaped groove 60, so that the driving rod 75 rotates along the fourth rotating shaft 752, the other end of the driving rod 75 drives the stressed slider 73 to extrude the return spring 74 when rotating, after one end of the driving rod 75 close to the stressed slider 73 moves to the lower end, the stressed slider 73 moves back under the elastic force of the return spring 74, and meanwhile, the driven rod 71 rotates upwards and clings to the surface of the limiting roller 62 to fixedly clamp the snare wire.

Further, as shown in fig. 5, the retraction device 8 includes a scraping block 81, a notch matched with the scraping block 81 is formed at the top of the outlet 64, a hanging plate 82 is fixedly connected to the top of the scraping block 81, the scraping block 81 is slidably connected to the housing 6 through the hanging plate 82, a pushing plate 84 is arranged at the top of the hanging plate 82, a connecting rod 85 is arranged between the pushing plate 84 and the hanging plate 82, and the pushing plate 84 is used for pushing the hanging plate 82 to slide up and down;

a limit baffle 83 is arranged between the push plate 84 and the hanging plate 82, the limit baffle 83 is fixed on the inner side wall of the machine shell 6, the connecting rod 85 penetrates through the limit baffle 83, a limit spring 86 is sleeved between the limit baffle 83 and the hanging plate 82 and on the surface of the connecting rod 85, the hanging plate 82 is connected with the limit baffle 83 through the limit spring 86, a cam 87 is arranged at the top of the push plate 84, the cam 87 is connected with the machine shell 6 in a rotating mode through a fixed rotating shaft, and the cam 87 is tightly attached to the surface of the push plate 84.

In the working process, by rotating the cam 87, when the protruding end of the cam 87 faces downwards, the push plate 84 can be pushed to move downwards, the push plate 84 can push the hanging plate 82 downwards through the connecting rod 85, the snare wire is fixed by the scraping block 81, adsorbed substances on the surface of the snare wire are scraped, and therefore the snare wire is prevented from being infected with foreign matters, the next use is facilitated, after the protruding end of the cam 87 rotates upwards, the hanging plate 82 can move upwards under the elastic action of the limiting spring 86 and returns to the original state, and the retracting action is completed.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is only one type of division of logical functions, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or communication connection may be an indirect coupling or communication connection between devices or units through some interfaces, and may be in a telecommunication or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

The above examples are only used to illustrate the technical solutions of the present invention, and do not limit the scope of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from these embodiments without inventive step, are within the scope of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art may still make various combinations, additions, deletions or other modifications of the features of the embodiments of the present invention according to the situation without conflict, so as to obtain different technical solutions without substantially departing from the spirit of the present invention, and these technical solutions also fall within the protection scope of the present invention.

Claims (6)

1. The utility model provides a snare for getting thing in blood vessel, includes snare drawing of wire book (1) and is used for receiving and releasing the fixed length of snare drawing of wire book (1) and receive and releases equipment, its characterized in that: the fixed-length winding and unwinding equipment comprises a fixed base (2), a fixed upright (3) is arranged at the top of the fixed base (2), one end, far away from the fixed base (2), of the fixed upright (3) is rotatably connected with a movable upright (4), one end, far away from the fixed upright (3), of the movable upright (4) is fixedly connected with a lifting mechanism (5), the front end of the lifting mechanism (5) is fixedly connected with a machine shell (6), and a loop wire drawing coil (1) is fixed in the machine shell (6);

a roller wheel (61) is arranged in the machine shell (6), the loop wire drawing coil (1) is wound on the surface of the roller wheel (61), a limiting roller (62) is arranged on one side of the roller wheel (61), two guide rollers (63) are arranged on one side, away from the roller wheel (61), of the limiting roller (62), the two guide rollers (63) are arranged oppositely, an outlet (64) is formed in one side, away from the limiting roller (62), of the guide rollers (63) and the side wall of the machine shell (6), and the loop wire drawing coil (1) passes through the limiting roller (62), penetrates through the guide rollers (63) and extends out of the outlet (64);

the bottom of the limiting roller (62) and the inner cavity of the machine shell (6) are provided with clamping devices (7), the clamping devices (7) are used for clamping the loop cover wire drawing coil (1), the top of the outlet (64) is provided with a winding and unwinding device (8), the winding and unwinding device (8) is used for winding and unwinding the loop cover wire drawing coil (1), each clamping device (7) comprises a driven rod (71), the rear end of each driven rod (71) is provided with a first rotating shaft (711), the driven rods (71) are rotatably connected with the machine shell (6) through the first rotating shafts (711), one ends, close to the first rotating shafts (711), of the driven rods (71) are movably connected with driving rods (75), one ends, far away from the driven rods (71), of the driving rods (75) are fixedly connected with fixed handles (76), arc-shaped grooves (60) matched with the fixed handles (76) are formed in the side walls of the machine shell (6), the driving rods (75) drive the driven rods (71) to rotate and enable the driven rods (71) to cling to the surface of the limiting roller (62), the surface of the driven rod (71) is provided with a stress rod (72), one end of the stress rod (72) close to the driven rod (71) is provided with a second rotating shaft (721), the stress rod (72) is rotatably connected with the driven rod (71) through the second rotating shaft (721), the surface of the stress rod (72) is provided with a movable groove, a stress slider (73) is connected in the movable groove in a sliding manner, one side of the stress slider (73) is provided with a return spring (74), the stress slider (73) is connected with the stress rod (72) through the return spring (74), the surface of the stress slider (73) is provided with a third rotating shaft (751), the driving rod (75) is rotatably connected with the stress slider (73) through the third rotating shaft (751), the center of the surface of the driving rod (75) is provided with a fourth rotating shaft (752), and the driving rod (75) is rotatably connected with the machine shell (6) through the fourth rotating shaft (752), the two ends of the arc-shaped groove (60) and the inner side wall of the machine shell (6) are fixedly connected with first stop levers (77), one end of the driving rod (75) close to the fixed handle (76) is positioned between the two first stop levers (77), a second stop lever (78) is fixedly connected with one end of the driven lever (71) far away from the first rotating shaft (711) and the inner side wall of the machine shell (6), the retraction device (8) comprises a scraping block (81), the top of the outlet (64) is provided with a notch matched with the scraping block (81), the top of the scraping block (81) is fixedly connected with a hanging plate (82), the scraping block (81) is connected with the machine shell (6) in a sliding way through a hanging plate (82), a push plate (84) is arranged at the top of the hanging plate (82), and a connecting rod (85) is arranged between the push plate (84) and the hanging plate (82), and the push plate (84) is used for pushing the hanging plate (82) to slide up and down.

2. A snare for endovascular access as claimed in claim 1, wherein: the lifting mechanism (5) comprises a fixed plate (51), a movable plate (52) is arranged at the rear end of the fixed plate (51), the movable plate (52) is connected with the fixed plate (51) in a sliding mode, and the machine shell (6) is fixed to the top of the movable plate (52).

3. A snare for endovascular access as claimed in claim 2, wherein: the rear end of the fixed plate (51) is fixedly connected with a sliding rail (53), the movable plate (52) penetrates through the space between the sliding rail (53) and the fixed plate (51), a driving gear (54) is arranged in an inner cavity of the sliding rail (53), the driving gear (54) is connected with the sliding rail (53) in a sliding mode, limiting columns (521) meshed with the driving gear (54) are distributed at the rear end of the movable plate (52) in an array mode, and the driving gear (54) is used for driving the movable plate (52) to slide up and down.

4. A snare for endovascular access as claimed in claim 3, wherein: the surface center department of driving gear (54) is provided with limiting slide block (55), limiting slide block (55) run through driving gear (54) and extend to both ends, the rear side of fly leaf (52) is opened and is equipped with first spout (522) with limiting slide block (55) matched with, driving gear (54) pass through limiting slide block (55) and fly leaf (52) activity link to each other, second spout (531) with limiting slide block (55) matched with are seted up on the surface of slide rail (53), driving gear (54) pass through limiting slide block (55) and slide rail (53) slide and link to each other.

5. A snare for endovascular access as claimed in claim 4, wherein: a limit baffle (83) is arranged between the push plate (84) and the hanging plate (82), the limit baffle (83) is fixed on the inner side wall of the machine shell (6), and the connecting rod (85) penetrates through the limit baffle (83).

6. A snare for endovascular fetching according to claim 5, wherein: between limit baffle (83) and hanger plate (82) and the surface cover of connecting rod (85) is equipped with limit spring (86), and hanger plate (82) link to each other with limit baffle (83) through limit spring (86), and the top of push pedal (84) is provided with cam (87), and cam (87) rotate with casing (6) through fixed rotating shaft and link to each other, and cam (87) hug closely in the surface of push pedal (84).

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