Conveying handle capable of realizing bidirectional bending

Abstract

The utility model relates to the field of medical instruments, and discloses a conveying handle capable of achieving bidirectional bending. The bend adjusting pipe is arranged in the shell in a penetrating manner; the first bending adjusting wire and the second bending adjusting wire are connected to the two opposite sides of the bending adjusting pipe in the first radial direction respectively; the third bending adjusting wire and the fourth bending adjusting wire are connected to the two opposite sides of the bending adjusting pipe in the second radial direction respectively; the first bending adjusting wire and the second bending adjusting wire are fixed and directly wound on the first rod body and can be in a tensioning state and a loosening state respectively along with rotation of the first rod body; the third bending adjusting wire and the fourth bending adjusting wire are fixed and directly wound on the second rod body and can be in a tensioning state and a loosening state respectively along with rotation of the second rod body; the first driving assembly drives the first rod body to rotate; and the second driving assembly drives the second rod body to rotate. According to the valve positioning device, secondary bending adjustment of a pipeline can be achieved so that the valve can be positioned to the accurate position, and effective bending adjustment and release can be carried out on a bending adjustment wire with high hardness.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a delivery handle capable of realizing bidirectional bending. Background Art

[0002] Cardiac interventional surgical instruments need to place the implanted valve prosthesis in the specified position. Due to the different degrees of differences in individual heart structures, it is more difficult to implant the valve prosthesis in the correct position. At the same time, ultrasound imaging during the operation requires that the imaging section and the system pipeline are in the same section, otherwise the exact position of the valve prosthesis cannot be located, which will bring great uncertainty to the subsequent release of the valve prosthesis to the specified position. Therefore, it is required that the system pipeline can be bent and then enter the ventricle for a second time to adjust the valve prosthesis to a position close to the axis of the native valve ring. This requires an improved solution that can achieve secondary bending adjustment of the system pipeline.

[0003] For some valve prostheses, the valve stent is in contact with the native valve ring only through radial support force. This structure requires that the radial support force of the valve stent is relatively large. Correspondingly, the strength of the pipeline of the delivery system matched with it is also required to be relatively high, which makes it difficult for the pipeline to bend. Therefore, it is necessary to increase the diameter of the bending wire to improve the strength. The increase in diameter will make the steel wire used as the bending wire harder. In the prior art, the bending wire is usually wound in the winding groove of the winding wheel. The inventor of the present application recognizes that the softer bending wire can be relatively effectively bound by the winding wheel, but for the harder bending wire, when it is not subjected to tension and is in a relaxed state, the bending wire wound on the winding wheel is easy to expand and break away from the winding groove due to its strong rigidity and is distributed to, for example, the main shaft on both sides of the winding wheel. In this way, when the tension is applied, the bending wire may be wound around other positions such as the main shaft, and cannot be effectively wound into the winding groove, affecting the bending and release of the bending wire.

[0004] Based on this, the existing technology still needs to be improved. Utility Model Content

[0005] The main purpose of the utility model is to provide a delivery handle that can achieve bidirectional bending, so as to solve the problems of how to achieve secondary bending adjustment of the pipeline to position the valve to an accurate position and how to effectively bend and release a bending wire with higher hardness.

[0006] According to one aspect of the utility model, a delivery handle capable of achieving bidirectional bending is provided, comprising:

[0007] case;

[0008] A bending adjustment pipe passing through the shell;

[0009] A first bending adjustment wire and a second bending adjustment wire are respectively connected to two opposite sides of the bending adjustment pipe along a first radial direction;

[0010] The third bending adjustment wire and the fourth bending adjustment wire are respectively connected to two opposite sides of the bending adjustment pipe along the second radial direction;

[0011] The first rod body, the first bending wire and the second bending wire are fixed and directly wound on the first rod body and can be in a tensioned state and a relaxed state respectively with the rotation of the first rod body, so as to drive the distal end of the bending pipe to bend toward the tensioning side in the first radial direction, or to be straightened toward the relaxation side in the first radial direction;

[0012] The second rod body, the third bending wire and the fourth bending wire are fixed and directly wound on the second rod body and can be in a tensioned state and a relaxed state respectively with the rotation of the second rod body, so as to drive the bending section of the distal end of the bending tube in the first radial direction to approach or overlap with a preset axis along the second radial direction;

[0013] A first driving assembly for driving the first rod body to rotate;

[0014] A second driving assembly drives the second rod body to rotate.

[0015] According to an embodiment of the present utility model, the first radial direction and the second radial direction are perpendicular to each other.

[0016] According to an embodiment of the utility model, the first rod body is disposed through the housing and extends along a direction parallel to the first radial direction; the second rod body is disposed through the housing and extends along a direction parallel to the second radial direction.

[0017] According to an embodiment of the present utility model, the first rod body and the second rod body are spaced apart by a predetermined distance in the axial direction of the bending tube.

[0018] According to one embodiment of the utility model, the first driving assembly includes a first worm wheel coaxially connected to the first rod body, a first worm matched with the first worm wheel, and a first knob driving the first worm to rotate; and / or

[0019] The second driving assembly includes a second worm wheel coaxially connected to the second rod body, a second worm screw matched with the second worm wheel, and a second knob driving the second worm screw to rotate.

[0020] According to an embodiment of the utility model, the first bending adjustment wire is directly fixed to one side of the first rod body, and the second bending adjustment wire is fixed to the other side of the first rod body after being wound around the first rod body for multiple turns;

[0021] The axis center of the proximal end of the bending adjustment tube is located on the left side or the right side of the middle position of the first rod body.

[0022] According to an embodiment of the present invention, the third bending wire and the fourth bending wire are respectively wound around the second rod body in opposite directions;

[0023] The axis center of the proximal end of the bending adjustment tube is located just above or just below the middle position of the second rod body.

[0024] According to one embodiment of the utility model, the first bending adjustment wire, the second bending adjustment wire, the third bending adjustment wire and / or the fourth bending adjustment wire are double-strand wires, and a through hole is radially opened on the first rod body and / or the second rod body. After each double-strand wire passes through the through hole, it is separated and respectively wrapped back from both sides of the circumference of the first rod body or the second rod body and then fixed together.

[0025] According to an embodiment of the utility model, the delivery handle also includes a mounting seat, the bending adjustment tube is inserted into the mounting seat, and the mounting seat can be detachably installed in the shell.

[0026] According to an embodiment of the utility model, the delivery handle further comprises: a protective cover covering the first drive assembly and the second drive assembly.

[0027] In the technical solution of the utility model, the first bending wire and the second bending wire are respectively connected to the opposite sides of the bending tube along the first radial direction, and the third bending wire and the fourth bending wire are respectively connected to the opposite sides of the bending tube along the second radial direction; when the first rod body is rotated, the first bending wire and the second bending wire are respectively in a tensioned state and a relaxed state, so that the flexible end of the distal end of the bending tube can be bent toward the tension side in the first radial direction; when the second rod body is rotated, the third bending wire and the fourth bending wire are respectively in a tensioned state and a relaxed state, so that the flexible end of the distal end of the bending tube can be bent toward the tension side in the second radial direction. Therefore, through the solution of the utility model, the bending tube can be bent toward the tension side in two radial directions, thereby realizing secondary bending adjustment of the pipeline to position the valve to an accurate position. Furthermore, in the present application, the bending wire is fixed and directly wound on the rod body instead of on the winding wheel. In this way, even if the harder bending wire expands in a relaxed state, it will still be distributed on the entire rod body. When the bending wire is tightened, it can be effectively wound on the rod body without being wound on other components. Effective bending and release of the harder bending wire can be achieved, and the provision of a winding wheel can also be omitted, which is conducive to simplifying the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings required for use in the embodiment will be briefly introduced below. Obviously, the drawings described below are only some implementation cases of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 An overall schematic diagram of a delivery handle that realizes bidirectional bending according to an embodiment of the utility model is shown;

[0030] Figure 2 Show Figure 1AA section view;

[0031] Figure 3 Show Figure 1 BB cross-sectional view;

[0032] Figure 4 A schematic diagram showing the first bending adjustment of the bending adjustment pipe according to an embodiment of the utility model;

[0033] Figure 5 A schematic diagram showing the second bending adjustment of the bending pipe according to an embodiment of the utility model;

[0034] Figure 6 A schematic diagram showing the distribution of the bending wires in an embodiment of the utility model is shown.

[0035] Description of reference numerals:

[0036] 10. Shell; 12. Mounting seat; 20. Adjustment tube; 30. First adjustment wire; 32. Second adjustment wire; 40. Third adjustment wire; 42. Fourth adjustment wire; 50. First rod body; 60. Second rod body; 70. First drive assembly; 72. First worm gear; 74. First worm; 76. First knob; 80. Second drive assembly; 82. Second worm gear; 84. Second worm; 86. Second knob; 100. Delivery handle; 200. Petal ring; X, first radial direction; Y, second radial direction. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] Figure 1 The overall schematic diagram of the delivery handle 100 realizing bidirectional bending according to an embodiment of the utility model is shown. Figure 2 Show Figure 1 AA section view, Figure 3 Show Figure 1 BB cross-section view. Figures 1 to 3The delivery handle 100 includes: a housing 10; a bending adjustment tube 20 inserted into the housing 10; a first bending adjustment wire 30 and a second bending adjustment wire 32, respectively connected to opposite sides of the bending adjustment tube 20 along a first radial direction X (the first bending adjustment wire 30 and the second bending adjustment wire 32 can be inserted into the bending adjustment tube 20 and connected to its distal end, and the distal end refers to the end away from the operator); a third bending adjustment wire 40 and a fourth bending adjustment wire 42, respectively connected to opposite sides of the bending adjustment tube 20 along a second radial direction Y (the third bending adjustment wire 40 and the fourth bending adjustment wire 42 can be inserted into the bending adjustment tube 20 and connected to its distal end); a first rod body 50, the first bending adjustment wire 30 and the second bending adjustment wire 32 are fixed and directly wrapped around The first rod 50 is wound around the first rod 50 and can be in a tensioned state and a relaxed state respectively with the rotation of the first rod 50, so as to drive the distal end of the bending adjustment tube 20 to bend toward the tensioning side on the first radial direction X, or to be straightened toward the relaxation side on the first radial direction X; the second rod 60, the third bending adjustment wire 40 and the fourth bending adjustment wire 42 are fixed and directly wound around the second rod 60 and can be in a tensioned state and a relaxed state respectively with the rotation of the second rod 60, so as to drive the bending section of the bending adjustment tube 20 in the first radial direction X to approach or overlap with a preset axis along the second radial direction Y; the first driving component 70 that drives the first rod 50 to rotate; the second driving component 80 that drives the second rod 60 to rotate.

[0040] Figure 4 A schematic diagram showing the first bending adjustment of the bending adjustment pipe 20 according to the embodiment of the utility model is shown. Figure 5 A schematic diagram showing the second bending adjustment of the bending adjustment pipe 20 according to an embodiment of the utility model is shown. Figure 6 The following is a schematic diagram showing the distribution of the bending wires in an embodiment of the utility model. Figures 1 to 6 In the technical solution of the utility model, when the first rod body 50 is rotated, the first bending wire 30 and the second bending wire 32 are respectively in a tensioned state and a relaxed state, so that the distal flexible end of the bending tube 20 can be bent toward the tensioning side in the first radial direction X, and the first bending of the bending tube 20 is completed (such as Figure 4 As shown in FIG. 1 ), the bending tube 20 can cross the valve ring 200, but the position at this time is often not accurately positioned at the center of the valve ring 200, and a second bending adjustment is required to adjust the bending tube 20 to the center of the valve ring 200. Therefore, by rotating the second rod 60, the third bending wire 40 and the fourth bending wire 42 are respectively in a tensioned state and a relaxed state, so that the distal flexible end of the bending tube 20 can be bent toward the tensioned side on the second radial direction Y, and the second bending adjustment of the bending tube 20 is completed (as shown in FIG. 1 ). Figure 5 As shown in the figure, the bending adjustment tube 20 is accurately positioned at the center of the valve ring 200, which greatly reduces the serious consequences such as valve displacement or dislocation caused by valve malposition after surgery.

[0041] Furthermore, in the present application, the bending wire is fixed and directly wound on the rod body instead of on the winding wheel. In this way, even if the harder bending wire expands in a relaxed state, it will still be distributed on the entire rod body. When the bending wire is tightened, it can be effectively wound on the rod body without being wound on other components. Effective bending and release of the harder bending wire can be achieved, and the provision of a winding wheel can also be omitted, which is conducive to simplifying the structure.

[0042] In the embodiment of the utility model, the first bending adjustment wire 30 and the second bending adjustment wire 32 are respectively connected to the opposite sides of the bending adjustment tube 20 along the first radial direction X, so that when the first bending adjustment wire 30 is in a tensioned state to bend the distal flexible end of the bending adjustment tube 20 toward the tensioned side, the second bending adjustment wire 32 in a relaxed state can allow the bending adjustment tube 20 to bend toward the tensioned side. In addition, the first rod body 50 can be rotated in the reverse direction so that the first bending adjustment wire 30 and the second bending adjustment wire 32 are in a relaxed state and a tensioned state respectively, and the tensioned side and the relaxed side are replaced at this time, so that the already bent bending adjustment tube 20 can be readjusted to a straight state, and even the bending adjustment tube 20 can be further bent in the reverse direction. The third bending adjustment wire 40 and the fourth bending adjustment wire 42 are similar, and will not be described in detail. It can be seen that the utility model is conducive to obtaining a richer bending effect (it can be bent to any side of any radial direction and can also be restored to a straight state) by connecting the first bending wire 30 and the second bending wire 32 to the opposite sides of the bending tube 20 along the first radial direction X, and connecting the third bending wire 40 and the fourth bending wire 42 to the opposite sides of the bending tube 20 along the second radial direction Y, and has better flexibility and adaptability. The bending tube 20 can be a multi-lumen tube, and each bending wire is inserted into a corresponding cavity and finally connected to each side of the distal flexible end of the bending tube 20.

[0043] refer to Figure 6 In some embodiments, the first radial direction X and the second radial direction Y are perpendicular to each other, so that the bending of the bending adjustment tube 20 can be adjusted more directly and effectively through the bending adjustment wire. The final bending effect of the bending adjustment tube 20 can be regarded as the additive result of the bending effect of the first radial direction X on the tightening side and the bending effect of the second radial direction Y on the tightening side.

[0044] Combination Figures 1 to 3In some embodiments, the first rod 50 is disposed through the housing 10 and extends in a direction parallel to the first radial direction X, so that the first bending wire 30 and the second bending wire 32 fixed to the first rod 50 can be naturally connected to the opposite sides of the bending tube 20 along the first radial direction X, respectively, and the first bending wire 30 and the second bending wire 32 can be respectively disposed in the areas of the first rod 50 located on both sides of the bending tube 20. Similarly, the second rod 60 is disposed through the housing 10 and extends in a direction parallel to the second radial direction Y, so that the third bending wire 40 and the fourth bending wire 42 fixed to the second rod 60 can be naturally connected to the opposite sides of the bending tube 20 along the second radial direction Y, respectively, and the third bending wire 40 and the fourth bending wire 42 can be respectively disposed in the areas of the second rod 60 located on both sides of the bending tube 20. The first rod body 50 may pass through opposite side walls of the housing 10 and may be rotatably connected to the housing 10, for example, by bearings, and the second rod body 60 may pass through opposite side walls of the housing 10 and may be rotatably connected to the housing 10, for example, by bearings. The first rod body 50 and the second rod body 60 may be spaced apart by a predetermined distance in the axial direction of the bending tube 20 to avoid interference with each other.

[0045] In some embodiments, the first drive assembly 70 includes a first worm wheel 72 coaxially connected to the first rod body 50, a first worm 74 matched with the first worm wheel 72, and a first knob 76 for driving the first worm 74 to rotate. Similarly, the second drive assembly 80 includes a second worm wheel 82 coaxially connected to the second rod body 60, a second worm 84 matched with the second worm wheel 82, and a second knob 86 for driving the second worm 84 to rotate. By adopting the transmission mode of worm wheels, a self-locking function can be achieved to ensure a stable bending effect.

[0046] refer to Figure 2 In some embodiments, the first bending wire 30 is directly fixed to one side of the first rod 50, and the second bending wire 32 is fixed to the other side of the first rod 50 after being wound around the first rod 50 for multiple turns, for example, after being wound clockwise for more than one turn, the bending wire 32 is fixed to the first rod 50. In some cases, when performing the first bending, the bending tube 20 may only need to be bent toward one side (for example, Figure 4 The first bending wire 30 is bent downward in the middle of the valve body 50 so that it can cross the valve ring 200. Therefore, the first bending wire 30 can be directly fixed to one side of the first rod body 50 to achieve tension during forward rotation, without winding to reserve margin for loosening during reverse rotation. When the first knob 76 is rotated in a predetermined direction, it drives the first worm 74 to rotate in the corresponding direction. Under the drive of the first worm 74, the first worm wheel 72 drives the first rod body 50 to rotate, so that the first bending wire 30 is wound and tightened, and the second bending wire 32 is relaxed, so that the distal flexible end of the bending tube 20 is bent toward the side where the first bending wire 30 is located. Reference Figure 1In some embodiments, the axis of the proximal end of the bending adjustment tube 20 is located on the left or right side of the middle position of the first rod body 50 to avoid interference between the bending adjustment tube 20 and the first rod body 50.

[0047] In some embodiments, the third bending wire 40 and the fourth bending wire 42 are respectively wound around the second rod 60 in opposite directions. For example, the third bending wire 40 is wound clockwise for more than one turn and then fixed to the second rod 60, and the fourth bending wire 42 is wound counterclockwise for more than one turn and then fixed to the second rod 60. In some cases, when performing the second bending, it may be necessary for the bending tube 20 to be able to bend in both directions (for example, except for the case where the bending tube 20 is bent in the opposite direction). Figure 5 In addition to the upward bending, it may sometimes be necessary to bend downward) to adjust the bending adjustment tube 20 to the center of the valve ring 200. Therefore, the third bending wire 40 and the fourth bending wire 42 are both wound around the second rod body 60 to reserve a margin. When the second knob 86 is rotated in a predetermined direction, it drives the second worm 84 to rotate in the corresponding direction. Under the drive of the second worm 84, the second worm gear 82 drives the second rod body 60 to rotate, so that the third bending wire 40 is tightened and the fourth bending wire 42 is relaxed. At this time, the distal flexible end of the bending adjustment tube 20 is bent toward the side where the third bending wire 40 is located. When the second knob 86 is rotated in a direction opposite to the predetermined direction, it drives the second worm 84 to rotate in the opposite direction. Under the drive of the second worm 84, the second worm gear 82 drives the second rod body 60 to rotate in the opposite direction, thereby switching to the third bending wire 40 being relaxed and the fourth bending wire 42 being tightened. At this time, the distal flexible end of the bending adjustment tube 20 is bent toward the side where the fourth bending wire 42 is located. Reference Figure 1 In some embodiments, the axis of the proximal end of the bending adjustment tube 20 is located just above or just below the middle position of the second rod body 60 to avoid interference between the bending adjustment tube 20 and the second rod body 60.

[0048] In some embodiments, the first bending adjustment wire 30, the second bending adjustment wire 32, the third bending adjustment wire 40 and / or the fourth bending adjustment wire 42 are double-stranded wires, and through holes are provided in the radial direction on the first rod body 50 and / or the second rod body 60. After each double-stranded wire passes through the through hole, it is separated and respectively wound back from the circumferential sides of the first rod body 50 or the second rod body 60 and then fixed together (for example, it is fixed together by a lock, or the double-stranded wires are knotted and fixed together). For example, the first bending adjustment wire 30 is a double-stranded wire, which is separated after passing through the through hole of the first rod body 50 and respectively wound back from the circumferential sides of the first rod body 50 and then fixed together. For another example, the third bending adjustment wire 40 is a double-stranded wire, which is separated after passing through the through hole of the second rod body 60 and respectively wound back from the circumferential sides of the second rod body 60 and then fixed together. In this way, the fixing of the bending adjustment wire can be achieved relatively simply and reliably. Of course, in other embodiments, the fixing of the bending adjustment wire can also be achieved by direct knotting, bonding, pressing, etc.

[0049] In some embodiments, the delivery handle 100 further includes a mounting seat 12, and the bending adjustment tube 20 is inserted into the mounting seat 12, and the mounting seat 12 can be detachably mounted in the housing 10. Thus, the bending adjustment tube 20 is fixed in the housing 10 by means of the mounting seat 12.

[0050] In some embodiments, the delivery handle 100 further includes: a protective cover for covering the first drive assembly 70 and the second drive assembly 80. The protective cover protects the first drive assembly 70 and the second drive assembly 80, thereby increasing the service life of the device.

[0051] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the disclosure of the embodiments of the present invention (including the claims) is limited to these examples; under the concept of the embodiments of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the above embodiments of the present invention, which are not provided in detail for the sake of simplicity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A delivery handle (100) capable of achieving bidirectional bending, characterized in that: include: Housing (10); A bending adjustment pipe (20) passing through the housing (10); A first bending adjustment wire (30) and a second bending adjustment wire (32) are respectively connected to two opposite sides of the bending adjustment tube (20) along a first radial direction (X); A third bending adjustment wire (40) and a fourth bending adjustment wire (42) are respectively connected to opposite sides of the bending adjustment tube (20) along a second radial direction (Y); A first rod body (50), the first bending adjustment wire (30) and the second bending adjustment wire (32) are fixed and directly wound on the first rod body (50) and can be in a tensioned state and a relaxed state respectively with the rotation of the first rod body (50), so as to drive the distal end of the bending adjustment tube (20) to bend toward the tensioning side on the first radial direction (X), or to be straightened toward the relaxation side on the first radial direction (X); a second rod (60), the third bending adjustment wire (40) and the fourth bending adjustment wire (42) being fixed and directly wound around the second rod (60) and respectively being in a tensioned state and a relaxed state as the second rod (60) rotates, so as to drive the bending section of the bending adjustment tube (20) in the first radial direction (X) to approach or overlap a preset axis along the second radial direction (Y); A first driving assembly (70) for driving the first rod (50) to rotate; A second driving assembly (80) drives the second rod (60) to rotate.

2. The delivery handle (100) according to claim 1, characterized in that: The first radial direction (X) and the second radial direction (Y) are perpendicular to each other.

3. The delivery handle (100) according to claim 1, characterized in that: The first rod body (50) is disposed through the housing (10) and extends in a direction parallel to the first radial direction (X); the second rod body (60) is disposed through the housing (10) and extends in a direction parallel to the second radial direction (Y).

4. The delivery handle (100) according to claim 1, characterized in that: The first rod body (50) and the second rod body (60) are spaced apart by a predetermined distance in the axial direction of the bending adjustment tube (20).

5. The delivery handle (100) according to claim 1, characterized in that: The first driving assembly (70) comprises a first worm wheel (72) coaxially connected to the first rod body (50), a first worm (74) matched with the first worm wheel (72), and a first knob (76) driving the first worm (74) to rotate; and / or The second driving assembly (80) includes a second worm gear (82) coaxially connected to the second rod body (60), a second worm (84) matched with the second worm gear (82), and a second knob (86) driving the second worm (84) to rotate.

6. The delivery handle (100) according to claim 1, characterized in that: The first bending adjustment wire (30) is directly fixed to one side of the first rod (50), and the second bending adjustment wire (32) is fixed to the other side of the first rod (50) after being wound around the first rod (50) for multiple turns; The axis of the proximal end of the bending adjustment tube (20) is located on the left or right side of the middle position of the first rod body (50).

7. The delivery handle (100) according to claim 1, characterized in that: The third bending adjustment wire (40) and the fourth bending adjustment wire (42) are respectively wound around the second rod (60) in opposite directions; The axis center of the proximal end of the bending adjustment tube (20) is located directly above or directly below the middle position of the second rod body (60).

8. The delivery handle (100) according to claim 1, characterized in that: The first bending adjustment wire (30), the second bending adjustment wire (32), the third bending adjustment wire (40) and / or the fourth bending adjustment wire (42) are double-stranded wires, and a through hole is radially provided on the first rod body (50) and / or the second rod body (60). After each of the double-stranded wires passes through the through hole, they are separated and respectively wound back from two circumferential sides of the first rod body (50) or the second rod body (60) and then fixed together.

9. The delivery handle (100) according to claim 1, characterized in that: It also comprises a mounting seat (12), the bending adjustment pipe (20) is inserted into the mounting seat (12), and the mounting seat (12) can be detachably mounted in the shell (10).

10. The delivery handle (100) according to claim 1, characterized in that: Also includes: A protective cover is provided for the first drive assembly (70) and the second drive assembly (80).

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