Bending-adjustable protective sleeve and bending-adjustable treatment optical fiber

Abstract

The invention discloses a bending-adjustable protection tube and a bending-adjustable treatment optical fiber. According to the disclosed scheme, the bending-adjustable treatment optical fiber comprises a handle, a bending-adjusting operation mechanism and a protection tube, wherein the bending adjusting operation mechanism and the protection tube are both installed on the handle, a treatment columnar optical fiber can be loaded in the protection tube, the bending adjusting operation mechanism comprises a rotating part and an adjusting part, a steel wire is wound on the rotating part, the free end of the steel wire extends into the wall of the protection tube, and the steel wire is driven to be shortened and lengthened by adjusting and rotating the rotating part. And bending and straightening of the protection tube are realized. According to the bending-adjustable treatment optical fiber, the angle of the front treatment area can be freely adjusted, so that an optical fiber treatment area and a patient treatment area can be perfectly overlapped and close, energy loss caused by the distance is reduced, a better treatment effect is achieved, and meanwhile, the situation that the scattering area is larger due to the larger scattering distance of the optical fiber is reduced. And temperature and illumination damage of tissues in a non-treatment area is caused.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to an adjustable bending therapeutic optical fiber. Background Art

[0002] Medical laser fiber is mainly used for the diagnosis and treatment of diseases. Common medical laser fibers include single-mode medical laser fiber and multi-mode medical laser fiber. Its general structure is that the core layer is in the middle, the cladding layer is outside the core layer, and the coating layer is outside the cladding layer. Generally, the light output is end-face light output, inclined light output and cylindrical light output.

[0003] Currently, fiber optic therapy is generally performed for surface treatment or reaches the diseased area through simple natural cavities or simple instrument channels. The optical fiber itself will not bend or deform during the process of entering the body. The surgery is complicated and difficult to operate. The uncontrollable entry of the optical fiber can easily cause physical damage. Summary of the invention

[0004] In view of the defects or shortcomings of the prior art, the present invention provides an adjustable bending protection tube.

[0005] To this end, the adjustable bending protection tube provided by the present invention comprises a handle, a bending operation mechanism and a protection tube;

[0006] The bending operation mechanism comprises:

[0007] A rotating member, along the axial direction of the rotating member, a wire winding section, a locking section, a spring installation section and an adjustment section are sequentially arranged on the rotating member, the radial dimension of the adjustment section is larger than the radial dimensions of the remaining sections, and the side surface of the adjustment section partially protrudes in the radial direction to form a convex structure, and a limiting structure A is arranged on an axial end surface of the convex structure; the locking section is provided with a plurality of first limiting structures, and the plurality of first limiting structures are distributed along the circumference of the rotating member; the spring installation section is sleeved with a spring;

[0008] An adjusting member, wherein a mounting hole is axially arranged in the adjusting member body, a groove is axially arranged on the inner wall of the mounting hole, and an arc-shaped cavity is circumferentially arranged on the inner wall of the mounting hole, and the groove is located at one circumferential end of the arc-shaped cavity, and the groove is connected with the arc-shaped cavity, and the axial dimension of the groove is greater than the axial dimension of the arc-shaped cavity; a limiting structure B is arranged on the inner wall of the arc-shaped cavity, and the limiting structure B is circumferentially away from the groove; a mounting structure A is arranged at one axial end of the adjusting member body;

[0009] The handle comprises a handle shell, wherein a cavity is arranged in the handle shell; a through hole A and a through hole B are opened on the side wall of the cavity; a limiting section and a mounting section (412) are arranged in sequence on the inner wall of the through hole A along the axial direction; and the limiting section is close to the inside of the handle shell; the limiting section is provided with a plurality of second limiting structures, and the plurality of second limiting structures are distributed along the circumference of the through hole A; and the mounting section is provided with a mounting structure B;

[0010] The adjusting member is movably mounted on the handle housing through the mounting structure A and the mounting structure B, and the through hole A is axially connected with the mounting hole;

[0011] The rotating member is installed in the through hole A and the mounting hole, wherein the wire winding section extends into the cavity, the limiting section is located in the through hole A, and the plurality of first limiting structures match the plurality of second limiting structures, the spring and the spring mounting section and the adjusting section are located in the mounting hole, and the protruding structure is located in the groove, and at the same time, one end of the spring contacts the adjusting section, and the other end contacts the handle housing;

[0012] The protective tube is connected to the through hole B, the steel wire winding section is wound with a steel wire, the free end of the steel wire passes through the handle housing and extends into the wall of the protective tube, and the steel wire passes through the entire protective tube or a partial section of the protective tube along the axial direction of the protective tube; the protective tube can accommodate a therapeutic cylindrical optical fiber;

[0013] When the bending needs to be adjusted, the rotating part is pushed into the cavity along the axial direction of the through hole A, so that the first limiting structure is separated from the second limiting structure, and the protruding structure moves along the groove to the arc-shaped cavity area, and then the rotating part is rotated, and the protruding structure moves to the limiting mechanism B in the arc-shaped cavity, and the limiting structure B matches the limiting structure A under the elastic force of the spring, so that the adjusting part and the rotating part are fixed, and then the adjusting part and the rotating part are rotated to drive the steel wire to wind, and the steel wire drives the protective tube to bend;

[0014] When it is necessary to straighten from a bent state, the rotating part is pushed into the cavity along the axial direction of the through hole A to compress the spring, and the limit structure B is disengaged from the limit structure A. At the same time, the rotating part is rotated in the opposite direction so that the raised structure turns to the groove area, and the steel wire is released in the opposite direction to drive the protective tube to straighten. Then, under the action of the spring force, the rotating part moves away from the handle shell, and the first limit structure matches the second limit structure.

[0015] The bend-adjustable protective cover of the present invention can be applied to the bend adjustment of medical devices such as therapeutic optical fibers during treatment.

[0016] An optional solution is that the steel wire winding section is wound with a steel wire, and the steel wire has two free ends, the two free ends pass through the handle housing and extend into the wall of the protection tube, and at the same time, each free end of the steel wire passes through the entire protection tube or a partial section of the protection tube along the axial direction of the protection tube, and the extension lengths of the two free ends in the protection tube are the same;

[0017] When the bending needs to be adjusted, the rotating part can be rotated in different directions to achieve the bending of the protective tube in two different directions.

[0018] An optional solution is that the adjustable bending protection tube includes two sets of bending operating mechanisms; two through holes A are opened on the side wall of the cavity, and the two through holes A are opened axially vertically; and a set of bending operating mechanisms is installed in each of the two through holes.

[0019] An optional solution is that the limiting structure A is a groove-shaped structure, and the limiting structure B is a protrusion-shaped structure matching the limiting structure A with the groove-shaped structure.

[0020] An optional solution is that the first limiting structure is a protrusion, and the axial dimension of the protrusion is the same as the axial length of the locking section, and the second limiting structure is a sliding groove adapted to the first limiting structure, and the axial dimension of the sliding groove is the same as the axial length of the limiting section.

[0021] An optional solution is that the free end of the steel wire extends to the end of the protective tube away from the handle shell, and a hard material tube sleeve is sleeved in the middle area of ​​the protective tube, and the protective tube between the end of the hard material tube sleeve away from the handle shell and the free end of the steel wire is a bending section.

[0022] An optional solution is that an isolation cavity is provided in the handle shell cavity, the through hole A is connected to the isolation cavity, and the rotating member extends into the isolation cavity; the steel wire passes through the isolation cavity and the handle shell in sequence and then extends into the protective tube.

[0023] An optional solution is that a wire winding section, a locking section, a spring installation section, an adjustment section and a hand-holding section are sequentially arranged on the rotating member along the axial direction of the rotating member, and the surface of the hand-holding section is provided with anti-slip grooves.

[0024] An optional solution is that the protection tube is connected to the through hole B via a protection sleeve.

[0025] An optional solution is that the protective tube is formed by an inner protective tube, an elastic tube and an outer protective tube which are sequentially assembled from the inside to the outside, the surface of the steel wire is coated, and the steel wire is fixed between the elastic tube and the outer protective tube.

[0026] An optional solution is that the inner protective tube is made of polytetrafluoroethylene; the elastic tube is a metal braided tube, a metal spring or a metal snake-bone tube; the outer protective tube is made of Pebax, TPU or silicone; the coating material is polytetrafluoroethylene; the distal end of the steel wire is fixedly connected to the distal end of the elastic tube by a fixing ring, wherein the fixing ring is welded to the end of the elastic tube, and the steel wire is welded to the fixing ring.

[0027] Another aspect of the present invention provides a bendable therapeutic optical fiber, which comprises the bendable protective cover and a therapeutic cylindrical optical fiber, wherein the therapeutic cylindrical optical fiber is installed in the protective cover.

[0028] The adjustable bend therapeutic optical fiber of the present invention can freely adjust the angle of the front treatment area, so that the optical fiber treatment area and the patient treatment area can be perfectly overlapped and close, reducing the energy loss caused by distance and achieving better treatment effects. At the same time, it can also reduce the temperature and light damage to tissues in non-treatment areas caused by the larger scattering area due to the larger scattering distance of the optical fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the internal structure of the adjustable bend therapeutic optical fiber of the present invention.

[0030] Figure 2 for Figure 1 AA section view.

[0031] Figure 3 for Figure 2 An enlarged schematic diagram of the center bending operating mechanism.

[0032] Figure 4 Schematic diagram of the overall structure of the handle housing in an embodiment of the present invention.

[0033] Figure 5 It is a cross-sectional view of the handle housing in an embodiment of the present invention.

[0034] Figure 6 Schematic diagram of the overall structure of the adjusting member in an embodiment of the present invention.

[0035] Figure 7 2 is a cross-sectional view of an adjusting member in an embodiment of the present invention.

[0036] Figure 8 Schematic diagram of the overall structure of the rotating part in the embodiment of the present invention.

[0037] Fig. 9 2 is a cross-sectional view of a rotating member in an embodiment of the present invention.

[0038] Fig.10 Schematic diagram of the structure of the protection tube in the embodiment of the present invention.

[0039] Fig.11 Schematic diagram of the internal structure of the distal end of the protection tube in an embodiment of the present invention.

[0040] Fig.12 Schematic diagram of the structural principle of the preparation pipe.

[0041] Fig.13 Schematic diagram of the structural principle of the metal snake tube. DETAILED DESCRIPTION

[0042] Unless otherwise specified, the scientific and technical terms used herein are understood according to the knowledge of ordinary technicians in the relevant fields.

[0043] The axial, radial and other directional or orientation terms of the relevant components described herein are consistent with the specific directions or orientations of the relevant components in the drawings of the specification. It is necessary to explain that the drawings of the specification are intended to explain the present invention, and the solutions obtained by those skilled in the art through equivalent rotation or exchange of directions or orientations based on the disclosure of this invention are all within the protection scope of the present invention.

[0044] See also Figure 1-9 As shown, the adjustable bending protection tube of the present invention comprises a handle, a bending operation mechanism and a protection tube 6, wherein the protection tube is a bendable protection tube, which can accommodate a therapeutic cylindrical optical fiber;

[0045] See also Figure 2 and 3 As shown, the bending operating mechanism includes a rotating member 12 and an adjusting member 3; Figure 8 and 9 As shown, a wire winding section 121, a locking section 122, a spring installation section 123 and an adjustment section 124 are sequentially arranged on the rotating member 12 along its axial direction, the radial dimension of the adjustment section is larger than the radial dimensions of the remaining sections, and the side surface of the adjustment section partially protrudes in the radial direction to form a protruding structure 125, and a limiting structure A126 is arranged on an axial end face of the protruding structure; the locking section is provided with a plurality of first limiting structures, and the plurality of first limiting structures are distributed along the circumference of the rotating member; the spring installation section is sleeved with a spring 11;

[0046] See also Figure 6 and 7 As shown, a mounting hole 31 is axially provided in the adjusting member body, a groove 32 is axially provided on the inner wall of the mounting hole, and an arc-shaped cavity 33 is circumferentially provided on the inner wall of the mounting hole, and the groove is located at one circumferential end of the arc-shaped cavity, and the groove is connected with the arc-shaped cavity, and the axial dimension of the groove is greater than the axial dimension of the arc-shaped cavity; a limiting structure B34 is provided on the inner wall of the arc-shaped cavity, and the limiting structure B is circumferentially away from the groove; a mounting structure A35 is provided at one axial end of the adjusting member body;

[0047] See also Figure 4 and 5 As shown, the handle includes a handle housing 4, and a cavity is arranged in the handle housing; a through hole A41 and a through hole B42 are opened on the side wall of the cavity; a limiting section 411 and a mounting section 412 are arranged in sequence on the inner wall of the through hole A along the axial direction; and the limiting section is close to the inside of the handle housing; the limiting section is provided with a plurality of second limiting structures, and the plurality of second limiting structures are distributed along the circumference of the through hole A; and the mounting section is provided with a mounting structure B;

[0048] See also Figure 3 As shown, the adjusting member 3 is movably mounted on the handle housing through the mounting structure A35 and the mounting structure B, and the through hole A41 is axially connected with the mounting hole 31;

[0049] The rotating member is installed in the through hole A and the mounting hole, wherein the wire winding section extends into the cavity, the limiting section is located in the through hole A, and the plurality of first limiting structures match the plurality of second limiting structures, the spring and the spring mounting section and the adjusting section are located in the mounting hole, and the protruding structure 125 is located in the groove, and at the same time, one end of the spring contacts the adjusting section, and the other end contacts the handle housing;

[0050] The protection tube is connected to the through hole B, the steel wire winding section is wound with a steel wire 61, the free end of the steel wire passes through the handle housing and extends into the wall of the protection tube, and the steel wire passes through the entire protection tube or a partial section of the protection tube along the axial direction of the protection tube, which is the initial state;

[0051] When the bending needs to be adjusted, the rotating part is pushed into the cavity along the axial direction of the through hole A, so that the first limiting structure is separated from the second limiting structure, and the protruding structure moves along the groove to the arc-shaped cavity area, and then the rotating part is rotated, and the protruding structure moves to the limiting mechanism B in the arc-shaped cavity, and the limiting structure B matches the limiting structure A under the elastic force of the spring, so that the adjusting part and the rotating part are fixed, and then the adjusting part and the rotating part are rotated to drive the steel wire to wind, and the steel wire drives the protective tube to bend;

[0052] When it needs to be straightened from a bent state, the rotating part is pushed into the cavity along the axial direction of the through hole A to compress the spring, and the limiting structure B is disengaged from the limiting structure A. At the same time, the rotating part is rotated in the opposite direction so that the protruding structure turns to the groove area, and the steel wire is released in the opposite direction to drive the protective tube to straighten. Then, under the action of the spring elastic force, the rotating part moves away from the handle shell, and the first limiting structure matches the second limiting structure, thereby returning to the initial state.

[0053] The adjustable bend treatment optical fiber of the present invention is based on the above scheme, and a treatment optical fiber or a diffuse optical fiber 8 is installed in the protection tube. In the specific scheme, the end of the protection tube away from the handle is sealed by a colloid 10 (such as Fig.11As shown). The adjustable bend therapeutic optical fiber can be used in interventional minimally invasive surgery. It enters the human body under the guidance of an endoscope, an X-ray machine or ultrasound, which can achieve a small wound, and the direction of needle insertion can be selected to insert the needle in a reasonable area with little restriction on human tissues and organs in the treatment area. If entering under the guidance of an endoscope, the adjustable bend therapeutic optical fiber can enter through the endoscope instrument channel, and the endoscope instrument channel can be used as a fulcrum for bending to achieve bending support. For some areas that conventionally require anterior needle insertion to treat, the adjustable bend therapeutic optical fiber can enter through the posterior route for treatment, reducing surgical risks (there are more human tissues and organs in the anterior route). During the whole process, the treatment optical fiber is adjusted after the optical fiber has been inserted and the surgical window has been sutured. In the later treatment examination, it is found that the treatment position and the area to be treated have an angular deviation, which can be corrected by an external adjustment part. In a further scheme, the treatment optical fiber is installed in the protective tube through the through hole C44 on the handle housing, and a dust cover 1 is installed on the through hole C.

[0054] In order to achieve multi-directional bending of the therapeutic optical fiber, in some solutions, the steel wire winding section is wound with a steel wire 61, and the steel wire has two free ends, which pass through the handle shell and extend into the wall of the protective tube. At the same time, each free end of the steel wire passes through the entire protective tube or a partial section of the protective tube along the axial direction of the protective tube, and the extension lengths of the two free ends in the protective tube are the same; when bending is required, the rotating part can be rotated in different directions to achieve bending of the protective tube in two different directions (such as left and right or up and down). In some other solutions, the adjustable bending protective tube includes two sets of bending operating mechanisms ( Figure 1 The figure shows an adjusting member 2 and another adjusting member 3 of a bending adjustment mechanism installed in two through holes A); two through holes A41 are opened on the side wall of the cavity, and the opening axes of the two through holes A are perpendicular; a set of bending adjustment mechanism is installed in each of the two through holes. On this basis, in some preferred schemes, two through holes A can be designed, and two free ends (61, 66) are present on the steel wire of each set of bending adjustment mechanism, so that the bending can be adjusted up and down and left and right.

[0055] In some other preferred embodiments, in order to prevent the steel wire from being entangled with other parts in the handle housing, an isolation chamber 43 is provided in the handle housing cavity, the through hole A41 is connected to the isolation chamber, and the rotating member extends into the isolation chamber; the steel wire passes through the isolation chamber and the handle housing in sequence and then extends into the protective tube. When there are two through holes A, each through hole A corresponds to one isolation chamber.

[0056] In the solution of the present invention, the limiting structures A and B can be matched by engaging concave and convex structures, for example Figure 4 and 5 In the figure, the limiting structure A is a groove-shaped structure, and the limiting structure B is a protrusion-shaped structure matching the groove-shaped structure limiting structure A.

[0057] The first limiting structure and the second limiting structure can be matched by engaging a concave and convex structure, such as Figure 6 and 7 In the embodiment, the first limiting structure is a protrusion, and the axial dimension of the protrusion is the same as the axial length of the locking section, and the second limiting structure is a sliding groove adapted to the first limiting structure, and the axial dimension of the sliding groove is the same as the axial length of the limiting section 411.

[0058] In some other schemes, the free end of the steel wire extends to the end of the protective tube away from the handle shell, and a hard reaming sleeve 7 is provided in the middle area of ​​the protective tube. The protective tube between the end of the hard reaming sleeve away from the handle shell and the free end of the steel wire is a bending section. The hard reaming sleeve can be used to establish a channel to reach the lesion in the inner cavity to be treated (that is, before using the adjustable bend treatment optical fiber, an instrument channel is first established using the hard reaming sleeve 7), and on the other hand, it serves as a fulcrum for bending.

[0059] In some optional schemes, for the convenience of operation, a wire winding section 121, a locking section 122, a spring installation section 123, an adjustment section 124 and a hand-held section 127 are sequentially arranged on the rotating member along the axial direction of the rotating member, and the surface of the hand-held section is provided with anti-slip grooves.

[0060] In some other optional solutions, the protection tube is connected to the through hole B through a hard protective cover 5.

[0061] In some other schemes, see Fig.10 As shown, the protective tube is composed of three layers of tubes, which are an inner protective tube 65, an elastic tube 62 and an outer protective tube 64 from the inside to the outside, and a steel wire 61 with a coating 67 on the outside is located between the elastic tube and the outer protective tube. In a further specific scheme, the material of the inner protective tube 65 is a material with a relatively low friction coefficient such as polytetrafluoroethylene; the elastic tube 62 is generally a metal braided tube, a metal spring or a metal snake bone tube; the material of the outer protective tube 64 is generally a material with relatively good biocompatibility such as Pebax, TPU, silicone and other materials; the coating 67 on the outside of the bent steel wire is generally a material with a relatively low friction coefficient such as polytetrafluoroethylene; the distal end of the steel wire is connected to the distal end of the elastic tube through a fixing ring 63, wherein the fixing ring is welded to the end of the elastic tube by low-temperature plasma, and the steel wire is welded to the fixing ring. Generally, the material of the fixing ring can be the same as that of the steel wire.

[0062] The bending radius of the therapeutic optical fiber can be further adjusted by selecting and designing the structural parameters of the elastic tube. For example, the braided tube can be made of stainless steel wire with a width of 0.3-1mm and a thickness of 0.09mm. The bend radius can also be adjusted by different β values ​​(β value represents the angle between the braided wire and the center line of the braided tube, see Fig.12The β value is generally between 30° and 60°. The smaller the β value, the harder the tube is, the greater the elasticity is, and the larger the minimum bending radius that can be achieved is. Metal snake tubes can be cut and assembled from stainless steel capillaries. Fig.13 As shown, different bending angles can be achieved through different L values; the smaller the L value, the smaller the minimum bending radius that can be achieved. The spring tube can be wound with a steel wire of suitable diameter, such as 0.2mm in diameter, and different minimum bending radii can be achieved through different pitch values. The smaller the pitch, the smaller the minimum bending radius that can be achieved, and the smaller the minimum bending radius, the more flexible the operation.

Claims

1. An adjustable bend protection tube, It is characterized in that It comprises a handle, a bending operating mechanism and a protective tube (6); The bending operation mechanism comprises: A rotating member (12), wherein a wire winding section (121), a locking section (122), a spring installation section (123) and an adjustment section (124) are sequentially arranged on the rotating member along the axial direction of the rotating member, wherein the radial dimension of the adjustment section is greater than the radial dimensions of the remaining sections, and a convex structure (125) is partially protruded in the radial direction on the side surface of the adjustment section, and a limiting structure A (126) is arranged on an axial end surface of the convex structure; the locking section is provided with a plurality of first limiting structures, and the plurality of first limiting structures are distributed along the circumference of the rotating member; and the spring installation section is sleeved with a spring (11); An adjusting member (3), wherein a mounting hole (31) is axially arranged in a main body of the adjusting member, a groove (32) is axially arranged on an inner wall of the mounting hole, and an arc-shaped cavity (33) is circumferentially arranged on the inner wall of the mounting hole, and the groove is located at one circumferential end of the arc-shaped cavity, and the groove is connected to the arc-shaped cavity, and the axial dimension of the groove is greater than the axial dimension of the arc-shaped cavity; a limiting structure B (34) is arranged on the inner wall of the arc-shaped cavity, and the limiting structure B is circumferentially away from the groove; and a mounting structure A (35) is arranged at one axial end of the adjusting member main body; The handle comprises a handle shell (4), wherein a cavity is provided in the handle shell; a through hole A (41) and a through hole B (42) are provided on the side wall of the cavity; a limiting section (411) and a mounting section (412) are provided in sequence on the inner wall of the through hole A along the axial direction; and the limiting section is close to the inside of the handle shell; the limiting section is provided with a plurality of second limiting structures, and the plurality of second limiting structures are distributed along the circumference of the through hole A; and the mounting section is provided with a mounting structure B; The adjusting member (3) is movably mounted on the handle housing via the mounting structure A (35) and the mounting structure B, and the through hole A (41) is axially connected to the mounting hole (31); The rotating member is installed in the through hole A and the mounting hole, wherein the wire winding section extends into the cavity, the limiting section is located in the through hole A, and the plurality of first limiting structures match the plurality of second limiting structures, the spring and the spring mounting section and the adjusting section are located in the mounting hole, and the protruding structure (125) is located in the groove, and at the same time, one end of the spring contacts the adjusting section, and the other end contacts the handle housing; The protective tube is connected to the through hole B, the steel wire winding section is wound with a steel wire (61), the free end of the steel wire passes through the handle housing and extends into the wall of the protective tube, and the steel wire passes through the entire protective tube or a partial section of the protective tube along the axial direction of the protective tube; the protective tube can accommodate a therapeutic cylindrical optical fiber; When the bending needs to be adjusted, the rotating part is pushed into the cavity along the axial direction of the through hole A, so that the first limiting structure is separated from the second limiting structure, and the protruding structure moves along the groove to the arc-shaped cavity area, and then the rotating part is rotated, and the protruding structure moves to the limiting mechanism B in the arc-shaped cavity, and the limiting structure B matches the limiting structure A under the elastic force of the spring, so that the adjusting part and the rotating part are fixed, and then the adjusting part and the rotating part are rotated to drive the steel wire to wind, and the steel wire drives the protective tube to bend; When it is necessary to straighten from a bent state, the rotating part is pushed into the cavity along the axial direction of the through hole A to compress the spring, and the limit structure B is disengaged from the limit structure A. At the same time, the rotating part is rotated in the opposite direction so that the raised structure turns to the groove area, and the steel wire is released in the opposite direction to drive the protective tube to straighten. Then, under the action of the spring force, the rotating part moves away from the handle shell, and the first limit structure matches the second limit structure.

2. The adjustable bend protection tube according to claim 1, It is characterized in that The steel wire winding section is wound with a steel wire (61), and the steel wire has two free ends, the two free ends pass through the handle housing and extend into the wall of the protection tube, and each free end of the steel wire passes through the entire protection tube or a partial section of the protection tube along the axial direction of the protection tube, and the extension lengths of the two free ends in the protection tube are the same; When the bending needs to be adjusted, the rotating part can be rotated in different directions to achieve the bending of the protective tube in two different directions.

3. The adjustable bend protection tube according to claim 1, It is characterized in that The adjustable bending protection tube includes two sets of bending operation mechanisms; Two through holes A (41) are provided on the side wall of the cavity, and the two through holes A are provided with vertical axes; a set of bending adjustment operating mechanism is installed in each of the two through holes.

4. The adjustable bend protection tube according to claim 1, It is characterized in that The limiting structure A is a groove-shaped structure, and the limiting structure B is a protrusion-shaped structure matching the groove-shaped limiting structure A.

5. The adjustable bend protection tube according to claim 1, It is characterized in that The first limiting structure is a protrusion, and the axial dimension of the protrusion is the same as the axial length of the locking section. The second limiting structure is a sliding groove adapted to the first limiting structure, and the axial dimension of the sliding groove is the same as the axial length of the limiting section (411).

6. The adjustable bend protection tube according to claim 1, It is characterized in that The free end of the steel wire extends to the end of the protection tube away from the handle shell, and the middle area of ​​the protection tube is covered with a hard material tube sleeve (7), and the protection tube between the end of the hard material tube sleeve away from the handle shell and the free end of the steel wire is a bending section.

7. The adjustable bend protection tube according to claim 1, It is characterized in that An isolation cavity (43) is provided in the handle shell cavity, the through hole A (41) is communicated with the isolation cavity, and the rotating member extends into the isolation cavity; the steel wire passes through the isolation cavity and the handle shell in sequence and then extends into the protective tube.

8. The adjustable bend protection tube according to claim 1, It is characterized in that Along the axial direction of the rotating member, a wire winding section (121), a locking section (122), a spring installation section (123), an adjustment section (124) and a hand-held section (127) are sequentially arranged on the rotating member, and the surface of the hand-held section is provided with anti-slip grooves.

9. The adjustable bend protection tube according to claim 1, It is characterized in that The protection tube is connected to the through hole B via a protection sleeve (5).

10. The adjustable bend protective cover according to claim 1, It is characterized in that The protective tube is formed by sequentially inserting an inner protective tube, an elastic tube and an outer protective tube from the inside to the outside. The surface of the steel wire is coated with a coating, and the steel wire is fixed between the elastic tube and the outer protective tube.

11. The adjustable bend protective cover according to claim 10, It is characterized in that The inner protective tube is made of polytetrafluoroethylene; the elastic tube is a metal braided tube, a metal spring or a metal snake-bone tube; the outer protective tube is made of Pebax, TPU or silicone; the coating material is polytetrafluoroethylene; the distal end of the steel wire is fixedly connected to the distal end of the elastic tube through a fixing ring, wherein the fixing ring is welded to the end of the elastic tube, and the steel wire is welded to the fixing ring.

12. An adjustable bending therapeutic optical fiber, It is characterized in that It comprises the adjustable bending protective cover as claimed in any one of claims 1 to 11 and a therapeutic cylindrical optical fiber (8), wherein the therapeutic cylindrical optical fiber is installed in the protective cover.

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