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 the curve control line 11 is wound on the fixed 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 the curve control line 11 is difficult to further tighten; if there is uncertainty about the position of the bending-controlling line 11 passing through the fixed shaft 101, the position of the bending-controlling line 11 passing through the fixed shaft 101 is not an expected track, which easily causes the rotation to be knotted together, and the bending-controlling line 11 is more difficult to be tightened. If the bending control line 11 wants to recover the initial loose state, the rotating part 102 needs to be rotated reversely, because the bending control line 11 is knotted, the bending control line 11 close to the rotating part 102 is recovered first, and the bending control line 11 close to the through hole of the fixed shaft 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-controlling line 11 is properly passed through the fixed shaft 101, after the bending-controlling line 11 is wound around the fixed shaft 101 for a certain number of turns, a large contact frictional resistance is formed between the bending-controlling line 11 and the fixed shaft 101, and further rotation of the rotating member 102 is prevented, so that the bending-controlling line 11 is difficult to be further tightened, and the bending-controlling effect is deteriorated. Even if the bending-controlling line 11 wants to recover the initial loose state, due to the influence of the frictional resistance, the bending-controlling line 11 close to the rotating part 102 is recovered first, and the bending-controlling line 11 close to the through hole of the fixed shaft 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 the adjustment key 5 and the driving gear 3;

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

FIG. 5 is a schematic view of a curved section of the outer 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, a driving shaft 2, a driving gear 3, a driven rack 4, an adjusting key 5, a telescopic knob 6, a threaded rod 7, a propelling pipe 8, a conveying outer pipe 9, a conveying inner pipe 10, a bending control line 11, a box body 12, a bending control pipe 13, a penetrating groove 21, an annular groove 31, a shaft main body 201, a limiting part 202, a shifting key 51, a shifting fork 52, a boss 81, a rod 82, a semi-annular component 91, a bending control line 11A, a bending control line 11B, a bending control line 11C, a fixed shaft 101 and a rotating part 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, a driving shaft 2, a driving gear 3, a driven rack 4, an adjusting key 5, a telescopic knob 6, a threaded rod 7, a propelling pipe 8, a box body 12, a bending control line 11 and a bending control pipe 13. The delivery system for delivering the implant comprises a bending control handle, an outer delivery tube 9 and an inner delivery tube 10 which are matched to realize the loading, delivery and release of the implant.

Generally, the telescopic knobs 6 on the bending control handles are used for controlling the advancing and retreating of the conveying outer pipes 9 and the conveying inner pipes 10; the bending control knob 1 is used for controlling the bending degree of the bending control pipe 13, and the adjusting key 5 is matched with the bending control knob 1 to control the bending degree of the bending control pipe 13 in multiple directions.

The transmission part of the bending control handle is positioned in the box body 12 and comprises a driving shaft 2, a driving gear 3, a driven rack 4 and a telescopic knob 6. The telescopic knob 6, the threaded rod 7, the propelling pipe 8, the conveying outer pipe 9, the conveying inner pipe 10 and the box body 12 are coaxially arranged. The outer dimension of the telescopic knob 6 is smaller than the inner dimension of the housing 12 to ensure that the telescopic knob 6 can freely rotate in the housing 12. The threaded rod 7, the propulsion tube 8, the outer conveying tube 9 and the inner conveying tube 10 are partially located inside the casing 12 and partially extend out of the casing 12.

The bending control knob 1 is located on the side face of the handle box body 12 and is coaxially connected with the driving shaft 2, and the bending control knob 1 can drive the driving shaft 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 driving shaft 2 includes a shaft main body 201 and a stopper member 202. The driving gear 3 is connected to the shaft main body 201 of the driving shaft 2, and the driving shaft 2 drives the driving gear 3 to move circumferentially. The connection between the driving gear 3 and the driving shaft 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, the drive gear 3 can slide in the axial direction of the drive shaft 2 but cannot rotate circumferentially with respect to the drive shaft 2. Specifically, when the driving gear 3 is fixedly connected with the driving shaft 2, the shifting fork 52 of the adjusting key 5 pushes the driving gear 3, the driving shaft 2 moves along with the driving gear 3, and the bending control knob 1 also moves; when the driving gear 3 is connected with the driving shaft 2 in a sliding manner and cannot rotate relative to the driving shaft 2, the shifting fork 52 of the adjusting key 5 pushes the driving gear 3, the driving gear 3 can slide on the driving shaft 2, but the driving shaft 2 does not move along with the driving gear 3, and the bending control knob 1 does not move.

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

The adjustment key 5 includes a dial key 51 and a shift fork 52 (shown in fig. 3), the dial key 51 of the adjustment key 5 is located outside the outer surface of the case 12, and the shift fork 52 of the adjustment key 5 is located inside the case 12. Specifically, the housing of the case 12 is provided with a through groove 21 (see fig. 1) through which the adjustment key 5 can be moved along the through groove 21. The through groove 21 may be linear or curved. Correspondingly, the adjusting key 5 can move linearly or in a curve. The shape of the dial key 51 of the adjustment 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 through groove 21. The middle section (middle section or middle part) of the driving gear 3 is provided with a circumferential inward concave annular groove 31, and the annular groove 31 provides a containing space for the shifting fork 52 of the adjusting key 5, so that the driving gear 3 is ensured to rotate around the axis to any angle and cannot interfere with the shifting fork 52 of the adjusting key 5. The fork 52 of the adjustment key 5 may be a rectangular parallelepiped, a cylinder, etc., and has a length such that the end point of the fork 52 is located in the annular groove 31 of the driving gear 3, and specifically, as shown in fig. 3, the length a2 of the fork 52 should be smaller than the distance a1 from the outer surface of the housing 12 to the bottom of the annular groove 31 of the driving gear 3 and larger than the distance A3 from the outer surface of the housing 12 to the outer surface of the driving gear 3.

When the adjustment 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), the fork 52 of the adjustment key 5 pushes the pinion 3 to butt the pinion 3 to the corresponding rack 4 (e.g., 4A to 4B, 4B to 4C, or 4A to 4C from the rack 4A). When the adjustment key 5 is moved to the direction of the bending control knob 1 (i.e. the moving direction is the direction B → a), the shift fork 52 of the adjustment key 5 pushes the driving gear 3 to be butted against the corresponding driven rack 4 (e.g. from the driven rack 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 driving shaft 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 the driving gear 3 is located to the end face of the box body 12 (i.e. the end face of the box body 12 close to the bending control knob 1).

The direction of motion of driven rack 4 is parallel with the axis of carrying outer 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, driving gear 3 can mesh with every driven rack 4 respectively promptly, driving gear 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 bending control 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 bending control 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 bending control lines 11 is fixed on the driven rack 4.

The telescopic 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 the telescopic 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 a boss 81 and a rod 82 (shown in figure 2), and the boss 81 plays a role in linear guiding, limits the circumferential motion of the propelling pipe 8 and forms a linear sliding pair with the box body 2. When the telescopic knob 6 is rotated, the delivery outer tube 9 can be advanced or retracted. Specifically, because flexible knob 6 is fixed connection with threaded rod 7, when rotatory flexible knob 6, threaded rod 7 rotates and drives and carry outer tube 9 to advance and retreat.

The threaded rod 7 and the thrust tube 8 each have a hollow chamber, through which the control bend line 11 leads from the driven toothed rack 4 and is connected to the control 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 bending control lines 11, and the circumferential distribution angles of the via holes on the propelling pipe 8 are consistent with those of the bending control lines 11 on the bending control lines 13. The control elbow 13 is coaxial with the conveying outer pipe 9 and is positioned at the outer side of the conveying outer pipe, meanwhile, the control elbow 13 is fixedly connected with the far end of the box body 12, and the control elbow 13 is not controlled by the telescopic knob 6 and can not advance and retreat. The outer transport pipe 9 is partially disposed inside the bend pipe 13 and can advance and retreat inside the bend pipe 13. When the control bend pipe 13 is bent, the delivery outer pipe 9 is forced to be bent, and the delivery outer pipe 9 is bent to be forced to be bent to be the delivery inner pipe 10.

The n lines (n = driven rack number) of the bend control line 11 are respectively connected with different bending sections of the bend control pipe 13, the bending sections of the bend 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 the bend control pipe 13 are mutually attached, so that the bend control pipe 13 is integrally bent towards one side. Referring to fig. 5, on the curved section of the control bend 13, a semi-annular member 131 may be disposed along the circumferential direction of the control bend 13, and the semi-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 the semi-annular member 131 is located on the outer surface of the bend control pipe 13, and the bend control line 11 extends through the wall of the bend control pipe 13, including the pipe section where the semi-annular member 131 is located, and is finally fixed to the distal end of the bend control pipe 13; in another embodiment, the semi-annular member 131 is located on the inner surface of the bend control tube 13, and the bend control line 11 is located on the inner surface of the bend control tube 13 and the outer side of the delivery catheter 10, such that the bend control line 11 extends through the wall of the bend control tube 13, and then the bend control line 11 extends through the wall of the catheter section where the semi-annular member 131 is located, and finally is fixed inside the distal end of the bend control tube 13. The plurality of semi-annular components 131 are connected in series by 1 bending control line 11, and when the bending control line 11 is tightened, the semi-annular components 131 of the bending section of the bending control pipe 13 are mutually attached, so that the whole bending control pipe 13 bends towards one side. The semi-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 the control 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 the control 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 the adjustment key 5 is disposed at the position a, and the bending control knob 1 is rotated, the bending control knob 1 drives the driving shaft 2 to rotate, so as to drive the driving gear 3 to rotate, and at this time, the driving gear 3 is engaged with the driven rack 4A, so as to drive the driven rack 4A to move linearly. When the driven rack 4A moves linearly, since the bending control wire 11A is fixed to the driven rack 4A, the bending control wire 11A is gradually tightened (see fig. 4), so that a specific section of the controllable 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 driven rack 4B to move linearly, so that the other section of the bending control pipe 13 is controlled to bend towards the other direction. When the adjustment 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 bending control pipe 13 is required, the bending control knob 1 is reversely rotated only by meshing the driving 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).

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