CN113244501A - Bending control handle for conveying implant and conveying system thereof - Google Patents

Abstract

The invention discloses a bending control handle for conveying an implant and a conveying system thereof, wherein the handle comprises: the device comprises a box body (12), a driving shaft (2), a driving gear (3), a bending control pipe (13) and a bending control line (11), wherein the bending control pipe is connected with the box body; the driving gear (3) is connected to the driving shaft (2), more than 2 driven racks (4) are arranged in the box body, and the driving gear (3) can be switched to be respectively meshed with the driven racks (4); and a bending control line (11) is arranged on each driven rack (4), and the bending control line (11) is connected with the bending control pipe (13) and is used for controlling the bending of the bending control pipe (13). All bending control directions are integrated through a knob, the handle is light and simplified, and the operation is more efficient and simple.

Description

Bending control handle for conveying implant and conveying system thereof

Technical Field

The invention relates to a bending control handle for conveying an implant and a conveying system thereof.

Background

Survey shows that the probability of heart valvulopathy of the middle-aged and the elderly is increased year by year, which directly influences the life quality and even the life safety of the middle-aged and the elderly. Traditional surgical treatment is still the first choice for patients with serious diseases, but for patients with advanced age, complicated multiple organ diseases, chest-open operation history and poor body recovery function, the traditional surgical operation has high risk and high death rate, and some patients even have no operation chance. In the last decade, the international intervention has made a remarkable progress through continuous exploration, and becomes the branch of the most promising field of intervention.

Interventional therapy is a brand new treatment technology which is developed in recent years internationally, and the principle of the interventional therapy is that a modern high-tech means is used for carrying out tiny wound treatment, and under the guidance of medical imaging equipment, a specially-made precise instrument is introduced into a human body to carry out diagnosis and local treatment on internal lesions. The technique has the characteristics of no operation, small wound, quick recovery, good effect and the like, and avoids the harm to patients caused by traditional surgical operations.

The human body structure is very complicated, and the accurate positioning of the interventional operation is one of the key factors for the success of the operation. In order to accurately deliver the implant to the target site through the complex tortuous anatomy of the body, it is often necessary to use a steerable handle.

It is often desirable for the handle to have at least two types of knobs, one for controlling flexion (controlling flexion) and one for controlling release of the implant (controlling axial movement). In the prior art, one bending control knob corresponds to bending control in one direction, and the bending of a catheter in different directions is controlled by operating different knobs. On the one hand, the surgeon needs to identify which knob is used to control the bending and which knob is used to control the release of the implant. On the other hand, the operator needs to distinguish which direction each bending control knob corresponds to. This undoubtedly increases the operational difficulty of the operation.

In addition, in the prior art, one bending control knob is correspondingly used for bending control in each direction, and the bending control knob needs to be manually operated, so that the bending control knob is not suitable to be small, so that one bending control knob needs to be added every time one bending control direction is added, namely, the size of the handle is increased, and even the handle needs to be operated by multiple persons when the size is too large.

In the prior art, the bending control wire is generally tightened or loosened in a winding mode, so that the bending control of the catheter is realized. As shown in fig. 6, after thecurve control line 11 is wound on thefixed shaft 101 for a certain number of turns, a large contact friction resistance is formed between the curve control line and the curve control line to prevent the driven gear from further rotating, and thecurve control line 11 is difficult to further tighten; if there is uncertainty about the position of the bending-controllingline 11 passing through thefixed shaft 101, the position of the bending-controllingline 11 passing through thefixed shaft 101 is not an expected track, which easily causes the rotation to be knotted together, and the bending-controllingline 11 is more difficult to be tightened. If thebending control line 11 wants to recover the initial loose state, the rotatingpart 102 needs to be rotated reversely, because thebending control line 11 is knotted, thebending control line 11 close to the rotatingpart 102 is recovered first, and thebending control line 11 close to the through hole of the fixedshaft 101 is recovered later, the catheter is flicked suddenly by a certain bending rigidity to recover the initial straight state, and the flicking process easily damages tissues. As shown in fig. 7, even if the bending-controllingline 11 is properly passed through thefixed shaft 101, after the bending-controllingline 11 is wound around thefixed shaft 101 for a certain number of turns, a large contact frictional resistance is formed between the bending-controllingline 11 and thefixed shaft 101, and further rotation of the rotatingmember 102 is prevented, so that the bending-controllingline 11 is difficult to be further tightened, and the bending-controlling effect is deteriorated. Even if the bending-controllingline 11 wants to recover the initial loose state, due to the influence of the frictional resistance, the bending-controllingline 11 close to the rotatingpart 102 is recovered first, and the bending-controllingline 11 close to the through hole of the fixedshaft 101 is recovered later, the catheter is suddenly bounced off by a certain bending rigidity to recover the initial straight state, the tissue is easily injured in the bouncing-off process, and the injury of the catheter with strong rigidity to the tissue is particularly obvious.

Disclosure of Invention

The handle and the conveying system thereof provided by the invention can solve the problems, and the handle is light and simplified by integrating all bending control directions through the knob, so that the operation is more efficient and simple. The technical scheme is as follows:

a bend-controlling handle for delivering an implant, the handle comprising: the device comprises a box body, a driving shaft, a driving gear, a bend control pipe and a bend control line, wherein the bend control pipe and the bend control line are connected with the box body; the driving gear is connected to the driving shaft, more than 2 driven racks are arranged in the box body, and the driving gear can be switched to be respectively meshed with the driven racks; and a bending control line is arranged on each driven rack, is connected with the bending control pipe and is used for controlling the bending of the bending control pipe.

Furthermore, the driving shaft is arranged in the box body, and one end of the driving shaft penetrates through the side face of the box body;

the bending control knob is arranged outside the box body and connected with the driving shaft, and the bending control knob can drive the driving shaft to rotate in the circumferential direction.

Furthermore, the box body is provided with an adjusting key for shifting the position of the driving gear, and the box body is provided with a through groove for moving the adjusting key.

Furthermore, the adjusting key comprises a shifting key and a shifting fork, the shifting key is positioned outside the box body, and the shifting fork is positioned inside the box body; the driving gear is provided with an annular groove which is inwards sunken in the circumferential direction, and the shifting fork of the adjusting key is inserted into the annular groove.

Further, the handle is including installing flexible knob, threaded rod and the propulsion pipe of box inside, the threaded rod with propulsion pipe threaded connection, flexible knob with the near-end fixed connection of threaded rod.

Further, the threaded rod and the propelling pipe are provided with a through inner cavity, and the bending control line penetrates through the inner cavity and is connected to the bending control pipe; the far-end face of the propelling pipe is provided with a plurality of through holes, and the number of the through holes is equal to that of the bending control lines.

Furthermore, the bending control pipe is provided with a plurality of bending sections, and the plurality of bending control lines are respectively connected with different bending sections of the bending control pipe.

Further, the propulsion pipe comprises a boss and a rod, and the boss is used for limiting the circumferential movement of the propulsion pipe.

Furthermore, the driving shaft comprises a shaft main body and a limiting part, the driving gear is connected to the shaft main body of the driving shaft, and the driving shaft is used for driving the driving gear to do circumferential motion; the limiting component is used for limiting the position of the driving gear.

Further, the driving gear and the driving shaft are fixedly or slidably connected in the axial direction and fixedly connected in the circumferential direction.

The utility model provides a conveying system, conveying system including carry the inner tube, carry the outer tube and accuse curved handle, accuse return bend the inner tube carry the outer tube coaxial setting, accuse curved line is in carry the outside of outer tube.

The invention has the following beneficial effects:

1) the 1 bending control knob integrally controls the bending of the catheter in multiple directions, so that the condition that the 1 bending control knob only controls the bending in 1 direction is avoided, and the operation convenience and precision of the handle are improved. In the invention, only one bending control knob is arranged, the selection of the bending control direction is controlled by the adjusting key, and when one direction is controlled, other directions are locked, thereby avoiding the possible misoperation when a plurality of bending control knobs are arranged in parallel in the prior art.

2) The curved knob of accuse of 1 integrated form is for a plurality of curved knobs of accuse of current handle, and the product is more brief, the lightweight. According to the invention, only one bending control knob is adopted, the adjusting key is used for shifting the bending control direction, and the bending degree of the catheter in one direction can be controlled every time the bending control knob is shifted by one gear, so that the product is lighter.

3) The linear displacement of the rack is adopted to drive the curve control line, so that the interventional instrument is convenient to remove from the body, and the complications are reduced. When the interventional operation is completed, the catheter tip is required to be returned from the curved state at the time of the operation to the straight state and then completely removed from the body. In the invention, the bending control line of the driven rack is always close to a linear state without winding, and the bending control line can be changed from a tightening state to a loosening state by only reversely rotating the bending control knob and restoring the rigidity by means of a certain straight line of the catheter, and then the body is smoothly removed, thereby reducing the occurrence probability of complications.

4) The bending control wire is basically in a linear state in the operation process, compared with the winding bending control wire in the prior art, the bending control wire has longer service life, and meanwhile, the bending control speed and the bending control precision can be kept unchanged all the time, so that the bending control effect is better.

Drawings

FIG. 1 is a top view of the exterior of a bend control handle and its delivery system in accordance with an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a bend control handle and its delivery system in accordance with an embodiment of the present invention;

FIG. 3 is a schematic view of theadjustment key 5 and thedriving gear 3;

FIG. 4 is a partial cross-sectional view of thehousing 12 in one embodiment of the invention;

FIG. 5 is a schematic view of a curved section of theouter delivery tube 9 according to an embodiment of the present invention; wherein FIG. 5a is a front view and FIG. 5b is a top view;

FIG. 6 is a schematic diagram of a prior art bend-controlling wire knotting;

FIG. 7 is a schematic view of a prior art winding stack with a stationary axis and bend-controlling lines.

In the figure: the bending control device comprises a bending control knob 1, adriving shaft 2, adriving gear 3, a driven rack 4, an adjustingkey 5, atelescopic knob 6, a threaded rod 7, a propelling pipe 8, a conveyingouter pipe 9, a conveyinginner pipe 10, abending control line 11, abox body 12, abending control pipe 13, a penetratinggroove 21, anannular groove 31, a shaftmain body 201, a limitingpart 202, a shiftingkey 51, ashifting fork 52, aboss 81, arod 82, a semi-annular component 91, abending control line 11A, abending control line 11B, abending control line 11C, afixed shaft 101 and a rotatingpart 102.

Detailed Description

The present invention will be described in further detail with reference to the drawings and the detailed description, but the present invention is not limited to the following examples.

To more clearly describe the structural features of the present invention, the terms "proximal", "distal", "axial" and "circumferential" are used as terms of orientation, wherein "proximal" denotes the end that is closer to the operator during the procedure; "distal" means the end away from the operator; "axial" refers to a direction along the axis of the drive handle; "circumferential" refers to the axial direction about the corresponding machine component. The term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.

Fig. 1 and 2 are a top view and a cross-sectional view of the bending control handle and its delivery system, respectively, in accordance with an embodiment of the present invention. As shown in the figure, the bending control handle comprises a bending control knob 1, adriving shaft 2, adriving gear 3, a driven rack 4, an adjustingkey 5, atelescopic knob 6, a threaded rod 7, a propelling pipe 8, abox body 12, abending control line 11 and abending control pipe 13. The delivery system for delivering the implant comprises a bending control handle, anouter delivery tube 9 and aninner delivery tube 10 which are matched to realize the loading, delivery and release of the implant.

Generally, thetelescopic knobs 6 on the bending control handles are used for controlling the advancing and retreating of the conveyingouter pipes 9 and the conveyinginner pipes 10; the bending control knob 1 is used for controlling the bending degree of thebending control pipe 13, and the adjustingkey 5 is matched with the bending control knob 1 to control the bending degree of thebending control pipe 13 in multiple directions.

The transmission part of the bending control handle is positioned in thebox body 12 and comprises a drivingshaft 2, adriving gear 3, a driven rack 4 and atelescopic knob 6. Thetelescopic knob 6, the threaded rod 7, the propelling pipe 8, the conveyingouter pipe 9, the conveyinginner pipe 10 and thebox body 12 are coaxially arranged. The outer dimension of thetelescopic knob 6 is smaller than the inner dimension of thehousing 12 to ensure that thetelescopic knob 6 can freely rotate in thehousing 12. The threaded rod 7, the propulsion tube 8, the outer conveyingtube 9 and the inner conveyingtube 10 are partially located inside thecasing 12 and partially extend out of thecasing 12.

The bending control knob 1 is located on the side face of thehandle box body 12 and is coaxially connected with the drivingshaft 2, and the bending control knob 1 can drive the drivingshaft 2 to rotate in the circumferential direction. The shape of the bending control knob 1 is not particularly limited in the present invention, and may be various shapes which are easy to handle, such as a cylindrical shape, a circular truncated cone shape, a spherical segment shape, and a spherical crown shape. For convenience of operation, the surface of the bending control knob 1 may be made of a frosted material or provided with ribs, waves and the like to increase friction force and optimize operation hand feeling, and the invention is not particularly limited.

Referring to fig. 4, the drivingshaft 2 includes a shaftmain body 201 and astopper member 202. Thedriving gear 3 is connected to the shaftmain body 201 of the drivingshaft 2, and the drivingshaft 2 drives thedriving gear 3 to move circumferentially. The connection between the drivinggear 3 and the drivingshaft 2 can be fixed or sliding, and when the connection is fixed, the connection can be interference connection, key groove connection, screw connection, bonding and the like; when slidably coupled, thedrive gear 3 can slide in the axial direction of thedrive shaft 2 but cannot rotate circumferentially with respect to thedrive shaft 2. Specifically, when thedriving gear 3 is fixedly connected with the drivingshaft 2, the shiftingfork 52 of the adjustingkey 5 pushes thedriving gear 3, the drivingshaft 2 moves along with thedriving gear 3, and the bending control knob 1 also moves; when thedriving gear 3 is connected with the drivingshaft 2 in a sliding manner and cannot rotate relative to the drivingshaft 2, the shiftingfork 52 of the adjustingkey 5 pushes thedriving gear 3, thedriving gear 3 can slide on the drivingshaft 2, but the drivingshaft 2 does not move along with thedriving gear 3, and the bending control knob 1 does not move.

Theposition restricting member 202 restricts the position of thedrive gear 3 and prevents thedrive gear 3 from being disengaged from thedrive shaft 2. The bending control knob 1, the drivingshaft 2 and thedriving gear 3 are coaxial.

Theadjustment key 5 includes adial key 51 and a shift fork 52 (shown in fig. 3), thedial key 51 of theadjustment key 5 is located outside the outer surface of thecase 12, and theshift fork 52 of theadjustment key 5 is located inside thecase 12. Specifically, the housing of thecase 12 is provided with a through groove 21 (see fig. 1) through which theadjustment key 5 can be moved along the throughgroove 21. The throughgroove 21 may be linear or curved. Correspondingly, the adjustingkey 5 can move linearly or in a curve. The shape of thedial key 51 of theadjustment key 5 is not particularly limited, and may be a cube, a cylinder, a semicircle, etc., and the size should be larger than the size of the throughgroove 21. The middle section (middle section or middle part) of thedriving gear 3 is provided with a circumferential inward concaveannular groove 31, and theannular groove 31 provides a containing space for the shiftingfork 52 of the adjustingkey 5, so that thedriving gear 3 is ensured to rotate around the axis to any angle and cannot interfere with the shiftingfork 52 of the adjustingkey 5. Thefork 52 of theadjustment key 5 may be a rectangular parallelepiped, a cylinder, etc., and has a length such that the end point of thefork 52 is located in theannular groove 31 of thedriving gear 3, and specifically, as shown in fig. 3, the length a2 of thefork 52 should be smaller than the distance a1 from the outer surface of thehousing 12 to the bottom of theannular groove 31 of thedriving gear 3 and larger than the distance A3 from the outer surface of thehousing 12 to the outer surface of thedriving gear 3.

When theadjustment key 5 is moved toward the position of the position limiting member 202 (i.e., the direction of movement is a → B direction, such as A, B shown in fig. 1), thefork 52 of theadjustment key 5 pushes thepinion 3 to butt thepinion 3 to the corresponding rack 4 (e.g., 4A to 4B, 4B to 4C, or 4A to 4C from therack 4A). When theadjustment key 5 is moved to the direction of the bending control knob 1 (i.e. the moving direction is the direction B → a), theshift fork 52 of theadjustment key 5 pushes thedriving gear 3 to be butted against the corresponding driven rack 4 (e.g. from the drivenrack 4B to 4A, 4C to 4B, or 4C to 4A). The exposed length L1 of the driving shaft 2 (i.e. the length of the drivingshaft 2 between the bending control knob 1 and the driving gear 3) should be greater than the distance L2 (shown in FIG. 2) from the driven rack where thedriving gear 3 is located to the end face of the box body 12 (i.e. the end face of thebox body 12 close to the bending control knob 1).

The direction of motion of driven rack 4 is parallel with the axis of carryingouter tube 9, according to the curved demand of accuse (controlling several directions crooked promptly, 1 driven rack corresponds a direction), the quantity of driven rack 4 can be 1, 2, 3 or a plurality ofly, every driven rack 4 can independently be linear motion, and is not influenced each other, drivinggear 3 can mesh with every driven rack 4 respectively promptly, drivinggear 3 meshes with which driven rack 4, which driven rack 4 is linear motion, other driven rack 4 is motionless. According to the bending control requirement, each bending control direction corresponds to one group of bendingcontrol lines 11 and the driven racks 4 matched with the bending control lines, and n bending control directions correspond to n groups. Fig. 4 shows that 3 groups of bendingcontrol lines 11 are matched with the driven rack 4, so that bending control in 3 directions can be realized, wherein 4A and 11A are one group, 4B and 11B are one group, and 4C and 11C are one group, and in the figure, one end of each group of bendingcontrol lines 11 is fixed on the driven rack 4.

Thetelescopic knob 6 is fixedly connected with the threaded rod 7 in a manner of interference connection, key groove connection, screw connection, glue connection and the like, and thetelescopic knob 6 can be in various shapes which are easy to operate, such as a cylinder, a cube and the like.

The threaded rod 7 is in threaded connection with the propelling pipe 8, the propelling pipe 8 comprises aboss 81 and a rod 82 (shown in figure 2), and theboss 81 plays a role in linear guiding, limits the circumferential motion of the propelling pipe 8 and forms a linear sliding pair with thebox body 2. When thetelescopic knob 6 is rotated, the deliveryouter tube 9 can be advanced or retracted. Specifically, becauseflexible knob 6 is fixed connection with threaded rod 7, when rotatoryflexible knob 6, threaded rod 7 rotates and drives and carryouter tube 9 to advance and retreat.

The threaded rod 7 and the thrust tube 8 each have a hollow chamber, through which thecontrol bend line 11 leads from the driven toothed rack 4 and is connected to thecontrol bend 13. The end face of the far end of the propelling pipe 8 is provided with a plurality of via holes for controlling the bending lines 11, the number of the via holes is equal to that of the bendingcontrol lines 11, and the circumferential distribution angles of the via holes on the propelling pipe 8 are consistent with those of the bendingcontrol lines 11 on the bendingcontrol lines 13. Thecontrol elbow 13 is coaxial with the conveyingouter pipe 9 and is positioned at the outer side of the conveying outer pipe, meanwhile, thecontrol elbow 13 is fixedly connected with the far end of thebox body 12, and thecontrol elbow 13 is not controlled by thetelescopic knob 6 and can not advance and retreat. Theouter transport pipe 9 is partially disposed inside thebend pipe 13 and can advance and retreat inside thebend pipe 13. When thecontrol bend pipe 13 is bent, the deliveryouter pipe 9 is forced to be bent, and the deliveryouter pipe 9 is bent to be forced to be bent to be the deliveryinner pipe 10.

The n lines (n = driven rack number) of thebend control line 11 are respectively connected with different bending sections of thebend control pipe 13, the bending sections of thebend control pipe 13 adopt a half-wave ring design, the wave rings are strung by 1 bend control line, and when the bend control lines are tightened, the half-wave rings of the bending sections of thebend control pipe 13 are mutually attached, so that thebend control pipe 13 is integrally bent towards one side. Referring to fig. 5, on the curved section of thecontrol bend 13, asemi-annular member 131 may be disposed along the circumferential direction of thecontrol bend 13, and thesemi-annular member 131 refers to a wall structure having only a semi-circle in the circumferential direction and having an intermittent groove in the axial direction. FIG. 5 shows an embodiment where thesemi-annular member 131 is located on the outer surface of thebend control pipe 13, and thebend control line 11 extends through the wall of thebend control pipe 13, including the pipe section where thesemi-annular member 131 is located, and is finally fixed to the distal end of thebend control pipe 13; in another embodiment, thesemi-annular member 131 is located on the inner surface of thebend control tube 13, and thebend control line 11 is located on the inner surface of thebend control tube 13 and the outer side of thedelivery catheter 10, such that thebend control line 11 extends through the wall of thebend control tube 13, and then thebend control line 11 extends through the wall of the catheter section where thesemi-annular member 131 is located, and finally is fixed inside the distal end of thebend control tube 13. The plurality ofsemi-annular components 131 are connected in series by 1bending control line 11, and when the bendingcontrol line 11 is tightened, thesemi-annular components 131 of the bending section of the bendingcontrol pipe 13 are mutually attached, so that the wholebending control pipe 13 bends towards one side. Thesemi-ring members 131 on different curved sections can be arranged along different semi-circular directions to control different conduit curved directions, such as the upper semi-circle and the lower semi-circle respectively arranged on thecontrol bend pipe 13 shown in fig. 5, which can control the delivery conduit to be curved upwards and downwards respectively, of course, the curved sections of thecontrol bend pipe 13 are not limited to the arrangement of the semi-ring members, and can be fan-shaped ring members with a fan center angle smaller than 180 degrees or other shapes of members.

As shown in fig. 1, 2 and 4, when theadjustment key 5 is disposed at the position a, and the bending control knob 1 is rotated, the bending control knob 1 drives the drivingshaft 2 to rotate, so as to drive thedriving gear 3 to rotate, and at this time, thedriving gear 3 is engaged with the drivenrack 4A, so as to drive the drivenrack 4A to move linearly. When the drivenrack 4A moves linearly, since the bendingcontrol wire 11A is fixed to the drivenrack 4A, the bendingcontrol wire 11A is gradually tightened (see fig. 4), so that a specific section of thecontrollable bending pipe 13 is bent toward a designated direction. When the adjusting key 5 moves to the position B, the bending control knob 1 is operated to drive the drivenrack 4B to move linearly, so that the other section of the bendingcontrol pipe 13 is controlled to bend towards the other direction. When theadjustment key 5 is moved to the position C or the position n, the matching mode of the parts can be similar to the positions A and B. If the bending recovery of the specific section of the bendingcontrol pipe 13 is required, the bending control knob 1 is reversely rotated only by meshing thedriving gear 3 with the corresponding driven rack 4.

Although the present invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (11)

1. A bend-controlling handle for delivering an implant, the handle comprising: the device comprises a box body (12), a driving shaft (2), a driving gear (3), a bending control pipe (13) and a bending control line (11), wherein the bending control pipe is connected with the box body;

the driving gear (3) is connected to the driving shaft (2), more than 2 driven racks (4) are arranged in the box body, and the driving gear (3) can be switched to be respectively meshed with the driven racks (4);

and a bending control line (11) is arranged on each driven rack (4), and the bending control line (11) is connected with the bending control pipe (13) and is used for controlling the bending of the bending control pipe (13).

2. The bend-controlling handle according to claim 1, wherein:

the driving shaft (2) is arranged in the box body (12), and one end of the driving shaft penetrates through the side face of the box body;

the bending control knob (1) is arranged outside the box body (12) and connected with the driving shaft (2), and the bending control knob (1) can drive the driving shaft (2) to rotate in the circumferential direction.

3. The bend-controlling handle according to claim 2, wherein: the box body (12) is provided with an adjusting key (5) used for shifting the position of the driving gear (3), and the box body is provided with a through groove (21) for the movement of the adjusting key (5).

4. The bend-controlling handle according to claim 3, wherein: the adjusting key (5) comprises a shifting key (51) and a shifting fork (52), the shifting key (51) is positioned outside the box body (12), and the shifting fork (52) is positioned inside the box body; the driving gear (3) is provided with an annular groove (31) which is recessed inwards in the circumferential direction, and the shifting fork (52) of the adjusting key (5) is inserted into the annular groove (31).

5. The bend-controlling handle according to claim 1, wherein: the handle is including installing flexible knob (6), threaded rod (7) and propulsion pipe (8) inside box (12), threaded rod (7) with propulsion pipe (8) threaded connection, flexible knob (6) with the near-end fixed connection of threaded rod (7).

6. The bend-controlling handle according to claim 5, wherein: the threaded rod (7) and the propelling pipe (8) are provided with through inner cavities, and the curve control line (11) penetrates through the inner cavities and is connected to the curve control pipe (13); the end face of the far end of the propelling pipe (8) is provided with a plurality of through holes, and the number of the through holes is equal to that of the bending control lines (11).

7. The bend-controlling handle according to claim 1, wherein: the bending control pipe (13) is provided with a plurality of bending sections, and the plurality of bending control lines (11) are respectively connected with different bending sections of the bending control pipe (13).

8. The bend-controlling handle according to claim 7, wherein: the propulsion pipe (8) comprises a boss (81) and a rod (82), and the boss (81) is used for limiting the circumferential movement of the propulsion pipe (8).

9. The bend-controlling handle according to claim 1, wherein: the driving shaft (2) comprises a shaft main body (201) and a limiting part (202), the driving gear (3) is connected to the shaft main body (201) of the driving shaft (2), and the driving shaft (2) is used for driving the driving gear (3) to move circumferentially; the limiting component (202) is used for limiting the position of the driving gear (3).

10. The bend-controlling handle according to claim 2, wherein: the driving gear (3) is fixedly or slidably connected with the driving shaft (2) in the axial direction and is fixedly connected with the driving shaft in the circumferential direction.

11. A conveying system, characterized in that the conveying system comprises an inner conveying pipe (10), an outer conveying pipe (9) and a bend control handle according to any one of claims 1-10, the bend control pipe (13), the inner conveying pipe (10) and the outer conveying pipe (9) are coaxially arranged, and the bend control line (11) is positioned outside the outer conveying pipe (9).

Images