A directional laser emitting device for a ureteroscope

Abstract

The present application relates to the field of ureteroscopes, and particularly relates to a directional laser emission device of a ureteroscope, which comprises two energy transmission optical fibers arranged inside the ureteroscope and a control spring piece, and the control spring piece is connected with the two energy transmission optical fibers; the control spring piece has a constraint form stored inside the ureteroscope and a memory form extended outside the ureteroscope, so that when the control spring piece is extended out of the ureteroscope, the control spring piece drives the two energy transmission optical fibers to rotate to face the front of the ureteroscope, so that the two output light beams emitted by the two energy transmission optical fiber exit ends can converge at a target area. The present application improves the energy density of the target area by the convergence of the two output light beams at the target area without increasing the energy density of a single output light beam, which is beneficial to crushing high-hardness stones; after the two output light beams penetrate the stones or pass by the edges of the stones, the two output light beams will irradiate towards two different directions, thereby reducing the risk of causing thermal damage to other surrounding tissues.

Description

Technical Field

[0001] This invention relates to the field of ureteroscopy, and more specifically to a directional laser emitting device for a ureteroscope. Background Technology

[0002] In minimally invasive urological surgery, endoscopic laser lithotripsy is a standard interventional procedure for treating urinary system stones. Laser lithotripsy involves inserting an optical fiber into the ureteroscope during a ureteroscopy. The output beam of a high-power pulsed laser is transmitted through the optical fiber and focused on the stone to break it up. Some ureteroscopes also integrate optical fibers, eliminating the need for medical staff to insert the fiber; the output beam of the high-power pulsed laser can be transmitted through the optical fiber built into the ureteroscope.

[0003] Current laser lithotripsy has the following drawbacks: for safety reasons, the energy density of the output beam is usually limited, making it difficult to break up high-hardness stones; if the energy density of the laser is increased, the risk of thermal damage to surrounding tissues after the output beam penetrates the stone or passes over the edge of the stone will increase. Summary of the Invention

[0004] The purpose of this invention is to provide a directional laser emission device for a ureteroscope to improve the laser energy density in the target area and reduce the risk of thermal damage.

[0005] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: A directional laser emitting device for a ureteroscope, comprising: The lateral cavities are arranged along the central axis of the ureteroscope, and one of the lateral cavities is arranged on each side of the operating channel of the ureteroscope. The guide cavity is located on the outer periphery of the operating channel along the central axis of the ureteroscope and connects to the lateral cavities on both sides; A control spring is disposed inside the guide cavity. The control spring is axially movable and has an extension section that can extend out of the guide cavity. The two sides of the extension section are respectively placed in the side wing cavities on the corresponding sides. The material of the curled memory section is a shape memory alloy, and the curled memory section has a shape memory shape that curls towards the center of the operating channel. The energy transmission fiber is provided in the side wing cavity on both sides. The emitting end of each energy transmission fiber is set as a bent section and is respectively arranged inside the corresponding curl memory part and limited by the curl memory part. Wherein, when the protruding section is located inside the guide cavity, the curled memory section maintains its constrained shape by the radial constraint of the side cavity; When the extended section extends out of the guide cavity, the curling memory section restores the memory shape and curls inward. At the same time, the two energy transmission optical fibers rotate with the curling action, so that the bending direction of the curved sections on both sides is towards the front of the ureteroscope, and the two output beams emitted from the output ends of the two energy transmission optical fibers can converge at a point.

[0006] Furthermore, the outer edge of the coiled memory section forms an inwardly coiled axial constraint channel, and the bent section of the energy transmission optical fiber is constrained within the axial constraint channel.

[0007] Furthermore, the axial constraint channel includes a clamping section near the outlet of the guide cavity, and the outer wall of the curved section is interference-fitted with the inner wall of the clamping section, thereby enabling the curling memory part to drive the curved section to move and rotate axially.

[0008] Furthermore, the axial constraint channel also includes a socket section away from the outlet of the guiding cavity, and the outer surface of the energy transmission optical fiber is clearance-fitted with the inner wall of the socket section.

[0009] Furthermore, the side wing cavities on both sides are symmetrically arranged with respect to the central axis of the operating channel. The side wing cavities on both sides have long axes that extend vertically and are parallel to each other on the plane of symmetry. This ensures that when the curling memory part is inside the guide cavity, the bending direction of the bending segment is the same as the vertical height direction of the side wing cavity, and the bending segments of the two energy transmission optical fibers are parallel to each other.

[0010] Furthermore, the cross-sectional dimension of the wing cavity is larger than the maximum outer contour dimension of the curved segment, so as to allow the curved segment to slide axially without interference inside the wing cavity.

[0011] Furthermore, the cross-section of the side wing cavity is oblong, the cross-section of the guide cavity is fan-shaped, and the edge of the guide cavity is tangent to the ends of the two side wing cavities.

[0012] Furthermore, the angle range of the curling action of the curling memory section from the constrained form to the memory form is set to enable the curved section to rotate 90°, so that the emitting ends of the two energy transmission optical fibers change from a parallel state to a cross-plane state.

[0013] Furthermore, a rigid guide is provided at the outlet edge of the guide cavity, and the outer wall of the guide is a tapered surface that tapers towards the outlet direction of the guide cavity. When the protruding section extends out of the guide cavity, the inner wall of the curled memory section contacts the outer wall of the guide member; When the control spring is subjected to axial tension, causing the protruding section to retract into the guide cavity, the conical surface guides the coiled memory section to expand radially outward, thereby maintaining the control spring in a constrained state.

[0014] Furthermore, the thickness of the control spring is less than the radial dimension of the corresponding position of the guide cavity, and the outer wall of the control spring is provided with multiple protrusions, which form line contact with the inner wall of the guide cavity.

[0015] Furthermore, the convex strip includes: A first protrusion is disposed at the center of one side surface of the control reed; Two second protrusions are provided on both sides of the other side surface of the control spring; The inner wall of the guide cavity contacts the first protrusion and the second protrusion, so that the guide cavity forms a three-line support line contact with the control spring.

[0016] Furthermore, an operating section is provided at the end of the control reed away from the protruding section. The operating section is exposed outside the guide cavity and can be operated to cause the control reed to be displaced axially along the guide cavity.

[0017] Compared with the prior art, this application has the following advantages: The laser emitting device provided by this invention arranges two energy transmission optical fibers with pre-set curved sections on both sides of the operating channel of a ureteroscope, and pushes the control reed to the outside of the ureteroscope. By utilizing the memory shape change of the control reed, the state of the curved sections of the two energy transmission optical fibers is changed, so that the output beam emitted from the emitting end of the energy transmission optical fiber can automatically converge to the target area. Thus, without increasing the energy density of a single output beam, the energy density of the target area can be increased by the convergence of the two output beams, which is beneficial for crushing high-hardness stones.

[0018] In terms of operation, it is only necessary to drive the axial displacement of the control reed, and there is no need to manually control the position of the energy transmission fiber to achieve the convergence of the output beams.

[0019] Furthermore, after the two output beams penetrate the stone or glide over its edge, they will irradiate in two different directions. Since the energy density of a single output beam is low, the risk of thermal damage to other surrounding tissues is reduced. Attached Figure Description

[0020] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0021] Figure 1 This is a front view of a non-crushing stone working condition according to an embodiment of the present invention; Figure 2 This is a perspective view of a non-crushing stone working condition according to an embodiment of the present invention; Figure 3 This is a perspective view of the constraint configuration of the control reed and the energy transmission optical fiber according to an embodiment of the present invention. Figure 4 This is a front view of the crushing operation in an embodiment of the present invention; Figure 5 This is a perspective view of the stone crushing operation according to an embodiment of the present invention; Figure 6 This is a perspective view of the release state of the control reed and the energy transmission optical fiber according to an embodiment of the present invention; Figure 7 This is a front view of a ureteroscope according to an embodiment of the present invention; Figure 8 This is a three-dimensional perspective view of a ureteroscope according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the crushing operation in an embodiment of the present invention.

[0022] The labels in the diagram represent the following: 1-Ureteroscope; 11-Operating channel; 12-Lateral cavity; 13-Guidance cavity; 2-Control spring; 21-Extending section; 22-Curling memory section; 221-Axial constraint channel; 222-Clamping section; 223-Sleeve section; 23-First convex strip; 24-Second convex strip; 25-Operating section; 3-Energy transmission fiber; 31-Bent section; 32-Straight section; 4-Guide components; 5-Ureteral wall; 6. Kidney stones. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The directional laser emission device for a ureteroscope 1 proposed in this application mainly addresses the problem of limited laser energy density in the target area when a single or multiple parallel output beams act on it in the prior art. Moreover, it is very difficult to accurately achieve this operation manually within the narrow space of the ureteroscope 1 so that multiple parallel output beams can converge at a single point.

[0025] In response to this difficulty, the directional laser emitting device for the ureteroscope 1 provided in this application aims to overcome this challenge, so as to make it easier to accurately converge the two output beams at one point inside the ureteroscope 1.

[0026] refer to Figures 1 to 9 The directional laser emitting device of the ureteroscope 1 includes: a lateral cavity 12 and a guiding cavity 13 disposed inside the ureteroscope 1, and an energy transmission fiber 3 and a control reed 2 respectively installed inside the lateral cavity 12 and the guiding cavity 13.

[0027] Two lateral cavities 12 are parallel to the central axis of the ureteroscope 1 and are symmetrically arranged on both sides of the operating channel 11 of the ureteroscope 1.

[0028] The guide channel 13 is parallel to the central axis of the ureteroscope 1, located on the outer periphery of the operating channel 11, and connects to the interior of the two lateral cavities 12.

[0029] The control spring 2 is disposed inside the guide cavity 13. The control spring 2 can be moved axially and has an extension section 21 that can extend out of the guide cavity 13. On both sides of the extension section 21 are curled memory sections 22 respectively placed in two side wing cavities 12. The material of the curled memory section 22 is a memory alloy (e.g., nickel-titanium memory alloy), and the curled memory section 22 has a memory shape that curls towards the center of the operation channel 11.

[0030] An energy transmission fiber 3 is provided in each of the two side wing cavities 12. The emitting end of each energy transmission fiber 3 is configured as a bent section 31 and is respectively located inside the corresponding curling memory section 22 and limited by the curling memory section 22.

[0031] When the protruding section 21 is inside the guide cavity 13, the coiled memory section 22 is radially constrained by the lateral cavity 12 and maintains its constrained shape. When the protruding section 21 extends out of the guide cavity 13, the coiled memory section 22 restores its memory shape. At the same time, the two energy transmission optical fibers 3 rotate with the coiling action so that the bending direction of the curved sections 31 on both sides is facing the front of the ureteroscope 1. The two output beams emitted by the two energy transmission optical fibers 3 converge at the predetermined target area (stone fragmentation area) within a predetermined working distance. The predetermined working distance is set according to the working distance of the ureteroscope to aspirate stone fragments.

[0032] An operating section 25 is provided at the end of the control reed 2 away from the extension section 21. The operating section 25 is exposed outside the guide cavity 13 and can be operated so that the control reed 2 is displaced axially along the guide cavity 13.

[0033] This embodiment also generally includes a laser host (not shown in the figure), which is connected to the energy transmission fiber 3 through an optical fiber coupling interface. When the medical staff steps on the foot switch, the shutter of the laser host opens, and the output beam is emitted through the energy transmission fiber 3.

[0034] This implementation method mainly achieves its purpose through the following technical means: First, refer to Figure 4 and Figure 5 The output beam emitted from the energy transmission fiber 3 is set to a bent state (i.e., bent section 31) so that the output beam emitted from the output end can be converged by simply changing the position and angle of the energy transmission fiber 3 using a pre-set bent state (deflection angle). Its advantage is that there is no need to bend the energy transmission fiber 3 during operation, thus avoiding the risk of the energy transmission fiber 3 being broken due to excessive bending.

[0035] Second, reference Figure 1 and Figure 2 A guide cavity 13 is formed around the operating channel 11 of the ureteroscope 1, and the guide cavity 13 has side wing cavities 12 distributed on both sides of the operating channel 11 to provide an initial position and state of accommodation space for the curvature of the energy transmission fiber 3. Its advantage is that the energy transmission fiber 3 can be housed inside the ureteroscope 1, which is conducive to the insertion of the ureteroscope 1 into the ureter.

[0036] Third, refer to Figure 3 and Figure 6 A control spring 2 is arranged in the guide cavity 13, and the bent section 31 of the energy transmission optical fiber 3 is connected to the coiling memory section 22 of the control spring 2. The extended section 21 of the control spring 2 can be extended so that the bent section 31 of the energy transmission optical fiber 3 can change its orientation as the memory shape is restored, so that the bending directions of the two bent sections 31 converge toward the center. The advantage is that medical staff only need to operate the axial sliding of the control spring 2 to control the retraction and extension of the energy transmission optical fiber 3. For example, the axial sliding of the control spring 2 can be operated by connecting the operating section 25 of the control spring 2 to an external handle on the ureteroscope 1.

[0037] Fourth, refer to Figure 9 Crossing the two output beams emitted by the energy transmission fiber 3 has the following advantages: On the one hand, the two intersecting laser beams ( Figure 9The thick solid lines converge at a point in the target area, increasing the laser energy density acting on the target area and thus improving the efficiency of crushing stones.

[0038] On the other hand, although a laser beam can achieve the technical effect of increasing the laser energy density by increasing the working power of the laser generator, a laser beam still has extremely high energy density after penetrating the stone or passing over the target area, which poses a high risk of accidental thermal damage.

[0039] However, the solution in this embodiment uses two output beams. It does not require increasing the energy density of a single output beam; instead, it achieves the target area's energy density by having the two output beams converge. The converged output beam ( Figure 9 The thick dashed line (6) irradiates in two different directions after penetrating the stone or passing over the target area, which reduces the risk of accidental thermal damage to the surrounding healthy ureteral wall tissue compared to enhancing the energy density of a single output beam.

[0040] The directional laser emitting device provided in this embodiment only needs to consider that the bent section 31 of the energy transmission fiber 3 can change from the initial state to a state in which the emitted output beams can converge. This is mainly achieved by pre-designing the structure of the control reed 2, especially the range and direction of its memory shape change, which can be obtained through multiple experiments and calculations.

[0041] In practical applications, the point where the output beams intersect can be any point in the field of view directly in front of the operation channel 11 (it can be on the axis or off the axis), depending on the specific application requirements.

[0042] The bent section 31 of the energy transmission fiber 3 can be relatively fixed by any structure that can constrain its relative position with the coiling memory section 22 of the control spring 2, but does not constrain the rotation of the straight section 32 of the energy transmission fiber 3. In one embodiment, an axial constraint channel 221 is used. Other structures that can achieve the same constraint effect can also be used, such as constraining the bent section 31 of the energy transmission fiber 3 by setting a ring structure in the coiling memory section 22.

[0043] The following provides a more preferred embodiment to solve the constraint problem of the bent section 31 of the power transmission optical fiber 3. Specifically, an axial constraint channel 221 that curls inward is formed on the outer edge of the curling memory section 22. The axis of the axial constraint channel 221 is an arc, and the bent section 31 of the power transmission optical fiber 3 is constrained and disposed within the axial constraint channel 221.

[0044] Those skilled in the art can determine the position of the intersection of the output beams based on the installation spacing between the two energy transmission optical fibers 3, the maximum radius of curvature of the curved section 31, the bending angle, and the target working distance between the ureteroscope 1 and the stone 6, according to the geometric optical relationship, and then calculate the deflection angle of the axial constraint channel 221.

[0045] The relative position of the bent section 31 of the energy transmission fiber 3 within the side cavity 12 is not restricted. This application mainly achieves the axial displacement and rotation of the bent section 31 of the energy transmission fiber 3 by configuring the bent section 31 of the energy transmission fiber 3 and the coiling memory part 22 of the control spring 2.

[0046] In a preferred embodiment, the side wing cavities 12 on both sides have a vertical height and are parallel to each other, and are symmetrically arranged with respect to the operation channel 11, so that when the curling memory section 22 is inside the guide cavity 13, the bending direction of the bending section 31 is the same as the vertical height direction of the side wing cavities 12, and the bending sections 31 on both sides are parallel to each other.

[0047] This symmetrical design simplifies the configuration requirements of the bending section 31 and the curling memory section 22 of the control reed 2, and makes the shaping and configuration of the guide cavity 13 easier, as well as the realization of the action and the convergence of the output beam more accurate.

[0048] Of course, the side wing cavities 12 on both sides can also preferably be a section of arc-shaped cavity with the same curvature as the outer periphery of the operating channel 11, and are arranged symmetrically.

[0049] The side wing cavity 12 can also be configured in other shapes, as long as the cross-sectional dimension of the side wing cavity 12 is larger than the maximum outer contour dimension of the curved section 31, thereby allowing the curved section 31 to slide axially without interference inside the side wing cavity 12; for example, the cross-section of the side wing cavity 12 is an elongated oval shape, the cross-section of the guide cavity 13 is a fan-shaped ring, and the edge of the guide cavity 13 is tangent to the ends of the two side wing cavities 12.

[0050] As a preferred embodiment, the design of the curling memory section 22 is preferably such that the angle range of the curling action of the curling memory section 22 from the constrained form to the memory form is set to allow the bent segment 31 to rotate 90°, so that the emitting end of the energy transmission optical fiber 3 changes from parallel to cross-coplanar, thereby achieving the purpose with a smaller range of action.

[0051] When the curled memory section 22 is in the memory state, the bent section 31 of the energy transmission fiber 3 is symmetrically located on both sides of the axis of the operation channel 11 and is coplanar, so that the two output beams emitted by the output end of the energy transmission fiber 3 converge in front of the axis of the operation channel 11.

[0052] In a preferred embodiment, the axial constraint channel 221 includes a clamping section 222 near the outlet of the guide cavity 13. The curved section 31 and the inner wall of the channel formed by the clamping section 222 are interference-fitted, so that the curling memory section 22 can drive the curved section 31 to move and rotate axially.

[0053] The axial constraint channel 221 also includes a socket section 223 at the outlet away from the guide cavity 13, and the energy transmission optical fiber 3 and the socket section 223 form a gap fit on the inner wall of the channel.

[0054] When the curled memory section 22 changes between the constrained form and the memory form, the shape of the clamping section 222 remains basically unchanged, and a flexible material, such as polytetrafluoroethylene, silicone, or polyurethane elastomer, is provided between the bending section 31 and the clamping section 222 as a pad, thereby reducing the risk that the clamping section 222 will crush the bending section 31 when the curled memory section 22 changes between the constrained form and the memory form.

[0055] The socket section 223 is used to constrain the radial position of the energy transmission fiber 3, but does not restrict the rotation and axial displacement of the energy transmission fiber 3, thereby making it easier for the bending section 31 to follow the rotation of the clamping section 222.

[0056] In a preferred embodiment, the outlet edge of the guide cavity 13 is provided with a rigid guide 4, and the outer wall of the guide 4 is a tapered surface that gradually narrows in the direction of the outlet of the guide cavity 13.

[0057] When the extension section 21 extends out of the guide cavity 13, the curling memory section 22 has a tendency to change from a constrained state to a memory state, thereby generating an inward radial curling action, so that the inner wall of the curling memory section 22 contacts the outer wall (conical surface) of the guide member 4.

[0058] When the control spring 2 is subjected to axial tension, causing the protruding section 21 to retract into the guide cavity 13, the conical surface acts as a wedge guide, guiding the curling memory section 22 to expand radially outward, thereby keeping the control spring 2 in a constrained shape.

[0059] The friction between the control spring 2 and the guide cavity 13 is crucial to whether medical staff can easily drive the control spring 2 to move axially. If the control spring 2 and the guide cavity 13 are tightly fitted together, the control spring 2 will be difficult to move axially.

[0060] In a preferred embodiment, the thickness of the control spring 2 is less than the radial dimension of the corresponding position of the guide cavity 13, and the outer wall of the control spring 2 is provided with a plurality of protrusions, which form line contact with the inner wall of the guide cavity 13.

[0061] The specific arrangement of the raised strips is as follows: A first protrusion 23 is provided at the center of one side surface of the control spring 2, and two second protrusions 24 are provided on both sides of the other side surface of the control spring 2. The length direction of the first protrusion 23 and the second protrusion 24 is arranged along the entire length of the control spring 2. The inner wall of the guide cavity 13 contacts the first protrusion 23 and the second protrusion 24, so that the guide cavity 13 forms a three-line support line contact with the control spring 2.

[0062] The working principle of this embodiment includes the following steps.

[0063] refer to Figure 1 , Figure 2 Step 1, Introduction and Positioning Stage: The ureteroscope 1 is advanced to the lesion area. The control reed 2 and the energy transmission fiber optic cable 3 are both housed inside the guide cavity 13. The control reed 2 is under the radial constraint force of the tube wall and is in a constrained state.

[0064] refer to Figure 4 , Figure 5 Step 2, Release and Convergence Stage: An axial thrust is applied to the control spring 2, causing the distal end of the control spring 2, along with the energy transmission fiber 3, to exit the guide cavity 13. After losing the constraint of the tube wall, the control spring 2 releases its elastic restoring force and automatically returns to its memory shape bent towards the center. Through the interference fit between the curled memory part 22 and the bent section 31, the bent section 31 is driven to rotate axially, causing the geometric optical paths of the two laser beams to converge at a predetermined distance in front of the endoscope.

[0065] refer to Figure 9 Step 3, Stone fragmentation stage: Each energy transmission fiber 3 corresponds to a laser generator. When two laser generators are turned on at the same time, the two high-energy-density output beams converge on the target area of ​​the stone 6 for effective fragmentation. The energy density of the non-converging area decays rapidly to avoid thermal damage to the surrounding tissue. On the other hand, if the size of the stone 6 is small, only one laser generator can be turned on, and there is no need to apply axial thrust to the control spring 2.

[0066] refer to Figure 1 , Figure 2 Step 4, Retraction and Reset Stage: After the crushing is completed, an axial pull is applied backward; the curling memory part 22 of the control spring 2 contacts and slides backward along the conical surface of the guide 4; the conical surface forces the curling memory part 22 to unfold outward, so that it is straightened again, and then the control spring 2 and the energy transmission fiber 3 smoothly retract and are concealed inside the guide cavity 13, completing the operation cycle.

[0067] Step 5, Suction Stage: The external suction device generates negative pressure suction through the operation channel 11 to suck the gravel into the operation channel 11.

[0068] Overall, in this embodiment, the two energy transmission optical fibers 3, driven by the control reed 2, can extend out of the ureteroscope 1 and automatically rotate to align the output end with the stone, thereby emitting two output beams that can converge at a point towards the stone. This not only increases the laser energy density in the target area but also reduces the laser energy density behind the target area, thus achieving the goal of improving stone fragmentation efficiency and reducing the risk of thermal damage.

[0069] Driven by the control reed 2, the two energy transmission optical fibers 3 can also be retracted into the ureteroscope 1, which is beneficial for medical staff to insert the ureteroscope 1 into the urethra, while avoiding the energy transmission optical fibers 3 from obstructing the operating channel 11 of the ureteroscope 1 from attracting stone fragments.

[0070] In addition, the energy transmission fiber 3 is configured to have a preset bending section 31, and the angle of the output end is adjusted by its own rotation during the operation. Compared with the scheme of bending the energy transmission fiber 3 during the operation, rotating the energy transmission fiber 3 makes it easier to control the output beam angle and can effectively avoid the energy transmission fiber 3 from being damaged due to excessive bending during the operation.

[0071] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of the present invention.

Claims

1. A directional laser emitting device for a ureteroscope, characterized in that, include: Side wing cavities (12) are provided along the central axis of the ureteroscope (1), and one side wing cavity (12) is provided on each side of the operating channel (11) of the ureteroscope (1). The guide cavity (13) is located on the outer periphery of the operating channel (11) along the central axis of the ureteroscope (1) and connects to the lateral cavities (12) on both sides. A control spring (2) is disposed inside the guide cavity (13). The control spring (2) can be moved axially and has an extension section (21) that can extend out of the guide cavity (13). The two sides of the extension section (21) are respectively placed in the side wing cavities (12) on the corresponding sides. The material of the extension section (22) is a memory alloy, and the extension section (22) has a memory shape that curls towards the center of the operation channel (11). An energy transmission fiber (3) is provided in each of the side wing cavities (12) on both sides. The output end of each energy transmission fiber (3) is set as a bent section (31) and is respectively located inside the corresponding curl memory section (22) and limited by the curl memory section (22). When the protruding section (21) is located inside the guiding cavity (13), the curling memory section (22) is constrained by the radial constraint of the side cavity (12) and maintains its constrained shape. When the extension section (21) extends out of the guide cavity (13), the curling memory section (22) restores the memory shape and curls inward. At the same time, the two energy transmission optical fibers (3) rotate with the curling action so that the bending direction of the curved sections (31) on both sides is towards the front of the ureteroscope (1), and the two output beams emitted from the output ends of the two energy transmission optical fibers (3) can converge at a point.

2. The directional laser emitting device for a ureteroscope according to claim 1, characterized in that, The outer edge of the coiled memory section (22) forms an inwardly coiled axial constraint channel (221), and the bent section (31) of the energy transmission fiber (3) is constrained within the axial constraint channel (221).

3. The directional laser emitting device for a ureteroscope according to claim 2, characterized in that, The axial constraint channel (221) includes a clamping section (222) near the outlet of the guide cavity (13). The outer wall of the curved section (31) is interference-fitted with the inner wall of the channel of the clamping section (222), thereby enabling the curling memory part (22) to drive the curved section (31) to move and rotate axially.

4. The directional laser emitting device for a ureteroscope according to claim 3, characterized in that, The axial constraint channel (221) also includes a socket section (223) away from the outlet of the guide cavity (13), and the outer surface of the energy transmission fiber (3) is clearance-fitted with the inner wall of the channel of the socket section (223).

5. The directional laser emitting device for a ureteroscope according to claim 1, characterized in that, The side wing cavities (12) on both sides are symmetrically arranged with respect to the central axis of the operation channel (11). The side wing cavities (12) on both sides have long axes that extend vertically and are parallel to each other on the plane of symmetry. This makes it possible that when the curling memory part (22) is inside the guide cavity (13), the bending direction of the bending section (31) is the same as that of the side wing cavity (12) in the vertical height direction, and the bending sections (31) of the two energy transmission optical fibers (3) are parallel to each other.

6. The directional laser emitting device for a ureteroscope according to claim 5, characterized in that, The cross-sectional dimension of the wing cavity (12) is larger than the maximum outer contour dimension of the curved section (31) to allow the curved section (31) to slide axially without interference inside the wing cavity (12).

7. The directional laser emitting device for a ureteroscope according to claim 5, characterized in that, The cross-section of the side wing cavity (12) is oblong, and the cross-section of the guide cavity (13) is fan-shaped. The edge of the guide cavity (13) is tangent to the ends of the two side wing cavities (12).

8. The directional laser emitting device for a ureteroscope according to claim 5, characterized in that, The angle range of the curling action of the curling memory section (22) from the constrained form to the memory form is set to enable the bending segment (31) to rotate 90° so that the axes of the emitting ends of the two energy transmission optical fibers (3) change from a parallel state to a cross-plane state.

9. The directional laser emitting device for a ureteroscope according to claim 1, characterized in that, The outlet edge of the guide cavity (13) is provided with a rigid guide (4), and the outer wall of the guide (4) is a tapered surface that tapers towards the outlet direction of the guide cavity (13). When the protruding section (21) extends out of the guide cavity (13), the inner wall of the curling memory section (22) contacts the outer wall of the guide (4); When the control spring (2) is subjected to axial tension, causing the protruding section (21) to retract into the guide cavity (13), the conical surface guides the curling memory section (22) to expand radially outward, thereby keeping the control spring (2) in a constrained state.

10. The directional laser emitting device for a ureteroscope according to claim 1, characterized in that, The thickness of the control spring (2) is less than the radial dimension of the corresponding position of the guide cavity (13). The outer wall of the control spring (2) is provided with a plurality of protrusions, and the protrusions form line contact with the inner wall of the guide cavity (13).

11. The directional laser emitting device for a ureteroscope according to claim 10, characterized in that, The protrusion includes: A first protrusion (23) is disposed at the center of one side surface of the control reed (2); Two second protrusions (24) are disposed on both sides of the other side surface of the control spring (2); The inner wall of the guide cavity (13) contacts the first protrusion (23) and the second protrusion (24) so ​​that the guide cavity (13) forms a three-line support line contact with the control spring (2).

12. The directional laser emitting device for a ureteroscope according to claim 1, characterized in that, The control reed (2) has an operating section (25) at one end away from the protrusion section (21). The operating section (25) is exposed outside the guide cavity (13) and can be operated to cause the control reed (2) to be axially displaced along the guide cavity (13).

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