Bending handle and adjustable bending sheath

Abstract

The utility model relates to the technical field of medical instruments, in particular to a bending adjusting handle and an adjustable bending sheath. The bending adjusting handle comprises an adjusting body, and a first connecting structure and a second connecting structure are arranged at the two ends of the adjusting body respectively. The sliding part is arranged on the outer surface of the adjusting main body and can linearly move on the outer surface of the adjusting main body; the connecting piece is arranged at one end of the adjusting main body and is movably connected with the first connecting structure; the protection piece is arranged on the outer surface of the connecting piece; and one end of the adjusting shell is arranged between the connecting piece and the protection piece, and the inner wall of the adjusting shell is in threaded connection with the outer surface of the sliding piece. According to the embodiment of the invention, the adjustment shell is mounted through the matching of the adjustment main body and the protection piece, and the adjustment of the bending adjustment sheath tube is realized through the matching of the adjustment shell and the sliding piece. Therefore, the adjusting main body and the sliding part are simpler in structure and more convenient to disassemble and assemble, and production and maintenance are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly to a bending adjustment handle and an adjustable bending sheath Background Art

[0002] Interventional therapy is a minimally invasive therapy using modern high-tech means. Under the guidance of medical imaging equipment, precision medical devices such as special catheters and guide wires are introduced into the human body to diagnose and locally treat lesions in the human body. Interventional surgery causes less trauma, less invasiveness, faster recovery and better effects to the human body, and is a medical technology that has rapidly emerged and been widely promoted in recent years

[0003] Currently, interventional surgery usually needs to rely on interventional diagnostic and treatment sheaths (such as guiding catheters, delivery sheaths, guiding sheaths, etc.) to establish a channel between the lesion site in the patient's body and the external operating end, so as to introduce various diagnostic and treatment instruments, drugs, implantable instruments, etc. to the lesion site of the patient, achieving the purpose of reaching the lesion site without using surgical operations. The interventional diagnostic and treatment sheath generally consists of a tube body and a handle. The tube body is usually long and has an inner cavity serving as a channel. The tube body has a distal end and a proximal end. The distal end can conveniently enter the human body lumen (such as blood vessels), and the proximal end is used to connect the handle for professional medical staff to use

[0004] In the process of implementing the present invention, the inventors of the present invention found that: currently, the existing adjustable sheaths still have problems such as non-simple internal structure, inconvenient operation for users during use, and instability when adjusting the bending angle of the adjustable bending sheath Summary of the Invention

[0005] Aiming at the above-mentioned defects of the prior art, the main purpose of the present utility model is to provide a bending adjustment handle, including: an adjustment main body, with a first connection structure and a second connection structure respectively arranged at both ends of the adjustment main body

[0006] A sliding member, arranged on the outer surface of the adjustment main body and capable of making a linear movement on the outer surface of the adjustment main body

[0007] A connecting member, arranged at one end of the adjustment main body and movably connected to the first connection structure

[0008] A protection member, arranged on the outer surface of the connecting member; and

[0009] An adjustment housing, with one end of the adjustment housing arranged between the connecting member and the protection member, and the inner wall being threadedly connected to the outer surface of the sliding member

[0010] Furthermore, the adjustment main body includes: a first tube body, with a first connection structure arranged at one end of the first tube body, and a limiting groove arranged on the outer surface of the first tube body

[0011] A stop member is provided at the other end of the first pipe body, and the stop member is connected to the adjustment housing;

[0012] A second pipe body is provided on the side of the stop member away from the first pipe body, and the second pipe body communicates with the first pipe body. A second connection structure is provided at the end of the second pipe body.

[0013] Furthermore, a sealing ring is provided at a position of the stop member close to the adjustment housing.

[0014] Furthermore, a thread is provided on the outer surface of the sliding member;

[0015] A limiting projection is provided on the inner wall of the sliding member and is engaged with a limiting groove; and,

[0016] A fixing member is provided on one side of the sliding member for fixedly installing a wire for adjusting the bend and moves along with the sliding member.

[0017] Furthermore, a through hole is provided on the sliding member for the wire for adjusting the bend to pass through.

[0018] Furthermore, a connection port is provided on the surface of the second pipe body, and the connection port communicates with the inside of the second pipe body.

[0019] Furthermore, anti-slip protrusions are provided on the outer surface of the adjustment housing.

[0020] Furthermore, the second connection structure includes a first connection body having a through hole extending from one end face to the other end face;

[0021] A groove is provided at a position near the edge at one end of the first connection body;

[0022] A protrusion structure is provided at one end of the first connection body near the groove;

[0023] A flange is provided on the inner peripheral edge of the through hole near the edge.

[0024] Furthermore, the adjusting handle is further provided with a quick-connecting member for connecting an expander.

[0025] One aspect of the embodiment also discloses an adjustable sheath, which includes the adjusting handle according to any one of the above;

[0026] An adjustable sheath tube, one end of the adjustable sheath tube passes through a protective member and extends into the adjustment housing, and a wire for adjusting the bend is connected to the sliding member;

[0027] An expander is provided on the second connection structure.

[0028] The beneficial effects of the above technical solutions provided by the embodiments of the present invention at least include:

[0029] In an embodiment, through the cooperation of the connecting member and the protective member, the adjusting housing can rotate radially around the adjusting body. At the same time, through the cooperation between the inner wall of the adjusting housing and the sliding member, when the adjusting housing is rotated, the sliding member can move along the axial direction of the adjusting body. That is, through the cooperation of the adjusting body and the protective member, the installation of the adjusting housing is realized. In this way, the movable installation of the adjusting housing is effectively ensured, and the adjustment of the deflectable sheath can also be realized through the cooperation of the adjusting housing and the sliding member. In the embodiment, the structures of the adjusting body and the sliding member are simpler, the disassembly and assembly are more convenient, which is helpful for production and maintenance.

[0030] Other features and advantages of the present invention will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained by the structures specifically pointed out in the written specification and the drawings.

[0031] The technical solutions of the present invention will be further described in detail below through the drawings and embodiments. Description of the Drawings

[0032] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0033] Figure 1 is a schematic diagram of a deflectable sheath according to an embodiment of the present utility model;

[0034] Figure 2 is a schematic diagram of the bending adjustment handle of the present utility model;

[0035] Figure 3 is an exploded view of the bending adjustment handle of the present utility model;

[0036] Figure 4 is an exploded view of the adjusting body of the present utility model;

[0037] Figure 5 is of the present utility model Figure 4 schematic diagram from another angle;

[0038] Figure 6 is an assembled view of the adjusting body of the present utility model;

[0039] Figure 7 is a schematic diagram of the sliding member of the present utility model;

[0040] Figure 8It is a schematic diagram of the second connection structure according to an embodiment of the present utility model;

[0041] Figure 9 is the present utility model Figure 7 A schematic diagram from another angle;

[0042] Figure 10 It is a schematic diagram of the second sealing ring according to an embodiment of the present utility model;

[0043] Figure 11 It is a schematic diagram of an adjustable bending sheath according to an embodiment of the present utility model;

[0044] Figure 12 is the present utility model Figure 11 A - A cross - sectional view.

[0045] Reference numerals:

[0046] 1, bending adjustment handle; 2, bending adjustment sheath tube; 3, bending adjustment wire;

[0047] 10, adjustment main body; 100, first tube body; 101, second tube body; 102, stop member; 103, connection port; 104, limit groove; 105, first connection structure; 106, second connection structure; 107, second sealing ring; 1060, first connection body; 1061, groove; 1062, perforation; 1063, convex structure;

[0048] 20, protection member;

[0049] 30, adjustment housing; 300, anti - slip protrusion;

[0050] 40, sliding member; 400, thread; 401, limit protrusion; 402, fixing member; 403, mounting hole;

[0051] 50, connecting member; 60, first sealing ring; 70, quick - connection member. Detailed implementation manners

[0052] Hereinafter, embodiments of the technical solutions of the present utility model will be described in detail with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model, so they are only examples and cannot be used to limit the protection scope of the present utility model.

[0053] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meanings understood by those skilled in the art to which the present utility model belongs.

[0054] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0055] In addition, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present utility model, the meaning of "a plurality" is more than two, unless otherwise specifically defined.

[0056] In the present application, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0057] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0058] In the prior art, the adjustable bending sheath is used to establish an access channel for vascular interventional surgery, assist other instruments to enter and exit the blood vessel and effectively reduce the damage of the instrument to the blood vessel wall, and at the same time reduce blood flow loss. Almost in all vascular interventional surgeries, an adjustable bending sheath is required.

[0059] Please refer to the attached Figure 2 and 3 , an adjustable bending handle 1, comprising: an adjusting main body 10, and a first connection structure 105 and a second connection structure 106 are respectively arranged at two ends of the adjusting main body 10;

[0060] A sliding member 40 is provided on the outer surface of the adjustment main body 10 and can perform linear movement on the outer surface of the adjustment main body 10;

[0061] A connecting member 50 is provided at one end of the adjustment main body 10 and is movably connected to the first connection structure 105;

[0062] A protection member 20 is provided on the outer surface of the connecting member 50; and,

[0063] An adjustment housing 30, one end of the adjustment housing 30 is provided between the connecting member 50 and the protection member 20, and the inner wall is threadedly connected to the outer surface of the sliding member 40 by a thread 400.

[0064] It can be understood that the sliding member 40 of this embodiment is used on the bending adjustment handle 1 for the adjustable bending sheath operation, and the sliding member 40 is set as a ring-shaped slider, and can also be considered as a tubular structure. In the embodiment, the sliding member 40 is sleeved on the adjustment main body 10. Therefore, in order to enable the sliding member 40 to move relative to the adjustment main body 10, a thread 400 is provided on the outer surface of the sliding member 40.

[0065] In the embodiment, through the cooperation of the connecting member 50 and the protection member 20, the adjustment housing 30 can perform radial rotation around the adjustment main body 10. At the same time, the cooperation between the inner wall of the adjustment housing 30 and the sliding member 40 enables the sliding member 40 to move along the axial direction of the adjustment main body 10 when the adjustment housing 30 is rotated. That is, through the cooperation of the adjustment main body 10 and the protection member 20, the installation of the adjustment housing 30 is realized. In this way, the movable installation of the adjustment housing 30 is effectively ensured, and the adjustment of the bending sheath tube 2 can also be realized by the cooperation of the adjustment housing 30 and the sliding member 40. In the embodiment, the structures of the adjustment main body 10 and the sliding member 40 are made simpler, and the disassembly and assembly are more convenient, which is helpful for production and maintenance.

[0066] Please refer to the appendix Figure 4 and 6 In the embodiment, further, the adjustment main body 10 includes: a first tube body 100, a first connection structure 105 is provided at one end of the first tube body 100, and a limit groove 104 is provided on the outer surface of the first tube body 100;

[0067] A stopper 102 is provided at the other end of the first tube body 100, and the stopper 102 is connected to the adjustment housing 30;

[0068] The second tube body 101 is provided on the side of the stopper 102 away from the first tube body 100, and the second tube body 101 is communicated with the first tube body 100. A second connection structure 106 is provided at the end of the second tube body 101.

[0069] It can be understood that in order to ensure that the bending adjustment housing rotates only in the radial direction when bending adjustment is required, a stopper 102 with a limiting structure needs to be provided on the first tube body 100. The stopper 102 can limit the axial movement of the bending adjustment housing at this end, while a connecting member 50 and a protective member 20 are provided at the other end of the first tube body 100 to limit the axial movement at this end, so that the bending adjustment housing can only rotate radially. In the embodiment, the convenience of operation is improved through such cooperation, and the structure is simpler.

[0070] The first connection structure 105 and the second connection structure 106 are respectively provided at the ends of the first tube body 100 and the second tube body 101, which are respectively used for detachably connecting other components. For example, the first connection structure 105 is used for detachably connecting the connecting member 50. In the actual embodiment, the first connection structure 105 can be a thread 400 or a snap connection structure.

[0071] The limiting groove 104 is arranged along the axial direction of the first tube body 100, which is used to limit the moving direction of the sliding member 40, that is, the sliding member 40 can only move along the limiting groove 104.

[0072] Please refer to the appendix Figure 4 , further in the embodiment, a first sealing ring 60 is provided at the position of the stopper close to the adjustment housing 30.

[0073] In order to ensure the sealing performance of the bending adjustment handle 1, it can be understood that by providing it on the adjustment main body 10, on the side of the stopper close to the adjustment housing 30, the first sealing ring 60 cooperates with the inner wall of the adjustment housing 30 to realize the sealing of the bending adjustment handle 1 at this place.

[0074] Please refer to the appendix Figure 5 , further in the embodiment, the outer surface of the sliding member 40 is provided with a thread 400;

[0075] A limiting protrusion 401 is provided on the inner wall of the sliding member 40 and cooperates with the limiting groove 104; and,

[0076] A fixing member 402 is provided on one side of the sliding member 40, which is used for fixedly installing the bending wire 3 and moves along with the sliding member 40.

[0077] It can be understood that in order to enable the sliding member 40 to only perform linear movement in the axial direction, in the embodiment, at least one limiting protrusion 401 is provided on the inner wall of the sliding member 40. The limiting protrusion 401 is installed by cooperating with the adjusting body 10, so that the sliding member 40 only performs linear movement along the adjusting body 10.

[0078] In the actual embodiment, the sliding member 40 is a structural member with an annular structure. The limiting protrusion 401 is arranged on the inner wall of the structural member. The limiting protrusion 401 cooperates with the outer surface of the adjusting body 10. A thread 400 is provided on the outer surface of the sliding member 40, and this thread 400 is threadedly connected to the inner wall thread 400 of the adjusting housing 30. By rotating the adjusting housing 30, the sliding member 40 can be adjusted to move axially. A fixing member 402 is arranged on the sliding member 40, and the bending wire 3 can be installed through the mounting hole 403 of the fixing member 402. When the sliding member 40 moves axially, the bending wire 3 can be pulled, realizing the adjustment of the bending degree of the bending sheath 2.

[0079] Please refer to the appendix Figure 7 , Further in the embodiment, a through hole is provided on the sliding member 40 for the bending wire 3 to pass through.

[0080] Please refer to the appendix Figure 10 and <00> 11 , Further in the embodiment, a connection port 103 is provided on the surface of the second tube body 101, and the connection port 103 is communicated with the inside of the second tube body 101.

[0081] In order to ensure that the operating handle meets the functions during operation, in the embodiment, a connection port 103 is provided on the second tube body 101, and the inner cavity of the second tube body 101 can be directly communicated through the connection port 103. For example, inserting an exhaust pipe between the connection ports 103 can achieve the purpose of exhausting gas.

[0082] In the embodiment, through the quick-disassembly connection port 103 structure, the plugging of other functional components is realized, achieving the convenience of operation and the simplicity of the structure, making the operation easier during operation and the product more applicable.

[0083] Please refer to the appendix Figure 3 , Further in the embodiment, anti-slip protrusions 300 are provided on the outer surface of the adjusting housing 30.

[0084] To prevent slipping during operation and causing problems such as operation errors, in the embodiment, anti-slip protrusions 300 are provided on the outer surface of the adjusting housing 30. When the user operates the handle, the friction can be effectively increased through the anti-slip protrusions 300 to ensure the accuracy of the operation.

[0085] In the embodiments, other anti-slip structures may also be provided on the outer surface of the adjustment housing 30, such as uniformly distributed concave structures or knurling structures, which are considered to have the same functions and effects as the anti-slip protrusions 300 here.

[0086] Please refer to the appendix Figure 7 and 8 For the embodiments, further, the second connection structure 106 includes a first connection body 1060, and the first connection body 1060 has a through hole 1062 extending from one end face to the other end face;

[0087] A groove 1061 is provided at one end of the first connection body 1060 near the edge position;

[0088] A protrusion structure 1063 is provided at one end of the first connection body 1060 near the groove 1061;

[0089] A flange is provided on the inner peripheral edge of the through hole 1062 near the edge.

[0090] To ensure that the second connection structure 106 can be installed and connected to the second pipe body 101, in the embodiments, the outer surface of the protrusion structure 1063 is in interference fit with the inside of the second pipe body 101, and the groove 1061 is in cooperation with the second pipe body 101. At the same time, to enable the second connection structure 106 to be quickly connected to the dilator, in the embodiments, a through hole 1062 extends from one end face to the other end face in the first connection body 1060, and a flange is provided on the inner peripheral edge of the through hole 1062 near the edge, and quick connection can be achieved through the cooperation of the protrusion with the dilator. In the embodiments, the second connection structure 106 realizes quick disassembly and assembly through interference fit, and quick disassembly and assembly can be achieved through the protrusion provided in the through hole 1062 with the dilator.

[0091] Wherein, a raised ring is provided at the end of the second pipe body 101, and the raised ring is installed in cooperation with the groove 1061. At the same time, the outer surface of the protrusion structure 1063 is installed in cooperation with the inner peripheral edge of the end of the second pipe body 101, so as to realize the connection and installation of the second connection structure 106 and the second pipe body 101 and achieve the purpose of quick disassembly and assembly.

[0092] Please refer to the appendix Figure 9 For the embodiments, further, a second sealing ring 107 is further provided at a position where the second connection structure 106 is close to the first pipe body 100.

[0093] To ensure the sealing of the end of the second tube body 101, in the embodiment, a second sealing ring 107 is provided at the end of the second connection structure 106. During use, the intervention tube passes through the second connection structure 106 and then through the second sealing ring 107. The tight fit between the second sealing ring 107 and the tube can play a sealing role.

[0094] Please refer to the appendix Figure 11 In the embodiment, the bending adjustment handle 1 is further provided with a quick connector for connecting the dilator.

[0095] To ensure that the bending adjustment handle 1 can quickly disassemble and assemble the dilator, so as to meet the actual dilation function during actual operation, in the embodiment, a quick connector is provided on the bending adjustment handle 1, and the dilator is quickly connected through the quick connector.

[0096] Please refer to the appendix Figure 1 In one aspect, the embodiment also discloses an adjustable bending sheath, which includes the bending adjustment handle 1 according to any one of the above;

[0097] A bending adjustment sheath tube 2, one end of the bending adjustment sheath tube 2 passes through the protective member 20 and extends into the adjustment housing 30, and the bending wire 3 is connected to the sliding member 40;

[0098] A dilator, which is provided on the second connection structure 106.

[0099] During actual use:

[0100] In the embodiment, one end of the bending adjustment sheath tube 2 first passes through the protective member 20 and the connecting member 50, then enters the adjustment main body 10, and the bending wire 3 is connected to the sliding member 40. The exhaust pipe is communicated with the bending adjustment sheath tube 2 through the connection port 103. First, connect a syringe (pump) to the through valve, and then inject physiological saline to discharge the air in the inner cavity of the bending adjustment sheath tube 2, so that the inner cavity is filled with physiological saline to avoid air entering the human body.

[0101] In the embodiment, the original state of the bending adjustment sheath tube is a long straight tube. The distal end of the bending adjustment sheath tube has an elastic section that can be freely bent within a certain arc range and actively restore its original state. The bending wire is arranged inside the bending adjustment sheath tube. The bending adjustment sheath tube includes a conveying inner cavity and a bending wire cavity. The bending wire passes through the bending wire cavity and is arranged in the middle of the wall of the bending adjustment sheath tube, and one end of the bending wire is connected to the sliding block. Near the proximal end of the bending adjustment sheath tube, adjust the adjustment housing, so that the sliding member can move linearly on the adjustment main body. In this way, the bending wire is subjected to a pulling force, which will cause the elastic section to bend within a certain angle range. If the pulling force on the bending wire is withdrawn, the elastic section will restore the straight tube original state.

[0102] When an interventional operation needs to be performed, the operator holds the adjustment housing and can adjust the bending of the bending sheath tube by simply rotating the adjustment housing. Specifically, when the adjustment housing is rotated to the left, the adjustment housing drives the sliding member away from the protection member. At this time, the bending wire for bending is pulled forward, realizing the bending of the bending sheath tube; if the adjustment housing is rotated to the right, the adjustment housing drives the sliding member closer to the protection member. At this time, the bending wire is released and relaxed, achieving the purpose of restoring the leftward bending.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A bending-adjusting handle, characterized in that, Comprising: An adjustment body, with a first connection structure and a second connection structure respectively provided at both ends of the adjustment body; A sliding member, provided on the outer surface of the adjustment body and capable of making a linear movement on the outer surface of the adjustment body; A connecting member, provided at one end of the adjustment body and movably connected to the first connection structure; A protective member, provided on the outer surface of the connecting member; And, An adjustment housing, with one end of the adjustment housing provided between the connecting member and the protective member, and the inner wall threadedly connected to the outer surface of the sliding member.

2. The bending adjustment handle according to claim 1, wherein, The adjustment body includes: a first pipe body, with a first connection structure provided at one end of the first pipe body, and a limiting groove provided on the outer surface of the first pipe body; A blocking member, provided at the other end of the first pipe body, and the blocking member is connected to the adjustment housing; A second pipe body, provided on the side of the blocking member away from the first pipe body, and the second pipe body communicates with the first pipe body, and a second connection structure is provided at the end of the second pipe body.

3. The bending adjustment handle according to claim 2, wherein, A first sealing ring is provided at a position of the blocking member close to the adjustment housing.

4. The bending adjustment handle according to claim 2, wherein, Threads are provided on the outer surface of the sliding member; A limiting protrusion, provided on the inner wall of the sliding member and cooperating with the limiting groove; and, A fixing member, provided on one side of the sliding member for fixedly installing a wire for bending adjustment and moving along with the sliding member.

5. The bending adjustment handle according to claim 4, wherein, A through hole is provided on the sliding member for the wire for bending adjustment to pass through.

6. The bending adjustment handle according to claim 2, wherein, A connection port is provided on the surface of the second pipe body, and the connection port communicates with the inside of the second pipe body.

7. The bending adjustment handle according to claim 1, wherein, Anti-slip protrusions are provided on the outer surface of the adjustment housing.

8. The bending adjustment handle according to claim 1, wherein, The second connection structure includes a first connection body, with a perforation penetrating from one end face to the other end face; A groove is provided at a position near the edge at one end of the first connection body; A protrusion structure is provided at one end of the first connection body near the groove; A flange is provided on the inner periphery of the perforation near the edge.

9. The bending adjustment handle according to claim 1, wherein, The bending adjustment handle further is provided with a quick-connecting member for connecting an expander.

10. An adjustable bending sheath, wherein, Comprising the bending adjustment handle according to any one of claims 1-9; A bending adjustment sheath tube, with one end of the bending adjustment sheath tube extending into the adjustment housing through the protective member, and the wire for bending adjustment is connected to the sliding member; An expander, provided on the second connection structure.

Images