An endoscope handpiece with side-firing fiber conduit

Abstract

The application discloses an endoscope handpiece with side-emitting optical fiber conduit and relates to the technical field of laser minimally invasive treatment instruments. The endoscope handpiece comprises an endoscope main body, an optical fiber conduit, an optical fiber body, a first control assembly, a second control assembly, a first linkage mechanism and a second linkage mechanism. The first control assembly can move along the length direction of the endoscope main body. The optical fiber conduit is movably arranged on the endoscope main body and can rotate relative to the first control main body. The optical fiber body is arranged in the optical fiber conduit and is provided with an optical fiber light outlet for emitting laser light laterally. The first control mechanism is used for driving the optical fiber conduit and the optical fiber body to rotate. The second control mechanism drives the first control main body, the optical fiber conduit and the optical fiber body to move along the length direction through the first linkage mechanism. The second linkage mechanism synchronously transmits the movement of the first linkage mechanism to the first control mechanism. The design can improve the traversal efficiency of the side-emitting laser on the target tissue and the operation continuity.

Description

Technical Field

[0001] This application relates to the field of laser minimally invasive treatment device technology, and in particular to an endoscope handpiece with a side-emitting fiber optic tube. Background Technology

[0002] Lasers, due to their concentrated energy, controllable target location, and ease of transmission via optical fibers, have been widely used in minimally invasive treatments of human diseases. Clinically used treatment fibers typically include direct-fiber lasers and side-fiber lasers. Direct-fiber lasers primarily project the laser beam forward along the fiber axis, while side-fiber lasers, through a beam-directing structure at the fiber end, project the laser beam laterally at a predetermined angle relative to the fiber axis. Depending on the treatment site and method, the side-fiber direction can be approximately 90°, 60°, or 30°. Side-fiber lasers allow the laser energy to act more directly on soft tissue lesions located beside the endoscopic channel, such as lesions in the prostate, thereby improving the efficiency of soft tissue resection or vaporization.

[0003] In actual surgical procedures, to ensure the laser beam covers the intended treatment area, the operator typically needs to adjust the axial extension position and circumferential orientation of the optical fiber. While existing endoscopic handpieces can be equipped with separate adjustment mechanisms for fiber advance / retraction and fiber rotation, these two mechanisms are usually independent. The operator must first complete the adjustment in one direction before switching to the other mechanism to complete the adjustment in the other direction, or they may need to use both hands to perform both adjustments. This independent adjustment method results in discontinuous surgical movements and makes it difficult to ensure the side-firing laser spot traverses the target tissue along a continuous spatial trajectory.

[0004] Especially when it is necessary to treat the lesion segment by segment along its axial range while simultaneously changing the lateral beam direction, independent adjustment can easily lead to repeated or missed irradiation of local areas. Operators also need to frequently change their grip and operating position, which reduces the efficiency of cutting, vaporizing, or pulverizing the target tissue and increases the difficulty of precise control. Therefore, it is necessary to provide an endoscopic handpiece that can link the axial advance / retraction and circumferential rotation of the optical fiber, allowing the operator to obtain a composite motion including axial and circumferential components in a single continuous operation. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide an endoscope handpiece with a side-fiber duct to solve the problem that the axial advance and retraction adjustment and circumferential rotation adjustment of the side-fiber in the existing endoscope handpiece are independent, resulting in low operation continuity and low traversal efficiency of the fiber to the target tissue.

[0006] To achieve the above technical objectives, this application provides an endoscope handpiece with a side-fiber duct, including an endoscope body, a fiber duct, a fiber body, a first control component, a second control component, a first linkage mechanism, and a second linkage mechanism. The first control component is movably mounted on the endoscope body along the length direction of the endoscope body. The first control component includes a first control body and a first control mechanism mounted on the first control body. The optical fiber conduit is movably installed on the endoscope body along the length of the endoscope body, and one end of the optical fiber conduit passes through the first control body and can rotate relative to the first control body; One end of the optical fiber body extends into the optical fiber conduit through one end and extends out through the other end of the optical fiber conduit. The portion of the optical fiber body extending out of the optical fiber conduit is provided with an optical fiber output port for lateral laser emission. The first control mechanism is connected to the optical fiber conduit via a transmission mechanism, and is used to drive the optical fiber conduit to rotate, thereby driving the optical fiber body to rotate; The second control component is installed on the endoscope body. The second control component includes a second control body and a second control mechanism installed on the second control body. The second control mechanism is connected to the first control body through the first linkage mechanism and is used to drive the first control body, the optical fiber conduit and the optical fiber body to move along the length direction of the endoscope body. The second linkage mechanism is connected between the first linkage mechanism and the first control mechanism. When the first linkage mechanism drives the first control body to move, it synchronously transmits the movement of the first linkage mechanism to the first control mechanism so as to synchronously drive the optical fiber guide tube and the optical fiber body to rotate.

[0007] Furthermore, the first control body is provided with a first through hole and a second through hole penetrating through itself; The first through hole allows the endoscope body to move through; The second through hole allows the optical fiber conduit to pass through; The endoscope handpiece also includes a locking assembly; The locking assembly is installed at one end of the optical fiber conduit and is used to lock the movement of the optical fiber body relative to the optical fiber conduit.

[0008] Furthermore, the locking assembly includes a lock sleeve, a lock head, and a locking elastic element; One end of the optical fiber conduit extends into the locking sleeve through one end of the locking sleeve; The portion of the optical fiber conduit that extends into the locking sleeve is provided with a guide section; One end of the lock sleeve is provided with a stop; The locking elastic element is disposed between the locking sleeve and the optical fiber conduit, with one end of the locking elastic element contacting the stop portion and the other end contacting the guide portion; The lock head is detachably mounted on the other end of the lock sleeve, and the end of the lock head that extends into the lock sleeve is provided with multiple claws distributed in a circumferential direction; The guide section is provided with a tapered guide cavity; When the lock head is connected to the lock sleeve, each of the claws extends into the tapered guide cavity under the action of the locking elastic element, and contracts radially under the guidance of the tapered guide cavity to clamp the optical fiber body passing through the claw.

[0009] Furthermore, one end of the second control body is rotatably connected to the endoscope body via a first shaft; The first axis is perpendicular to the length direction of the endoscope body; The second control mechanism includes a connecting handle and an operating handle; One end of the connecting handle is rotatably connected to the other end of the second control body via a second shaft; The other end of the connecting handle is connected to the operating handle; The second axis is parallel to the first axis.

[0010] Furthermore, the first linkage mechanism includes a first linkage block and a second linkage block that are fixedly connected and arranged at an angle; The end of the first linkage block away from the second linkage block is rotatably connected to the connecting handle via a third shaft; The end of the second linkage block furthest from the first linkage block is rotatably connected to the first control body via a fourth shaft; Both the third axis and the fourth axis are parallel to the first axis.

[0011] Furthermore, a reset elastic element is provided between the connecting handle and the operating handle; The reset elastic element is used to drive the second control mechanism to reset after the forward or backward operation of the operating handle is completed.

[0012] Furthermore, the first control mechanism includes a gear set and a gear drive handle; The gear set is installed inside the first control body and connected to the optical fiber conduit passing through the first control body; The gear drive handle is disposed outside the first control body, and one end of the gear drive handle is connected to the gear set for driving the gear set to rotate; The rotation center line of the gear set is parallel to the length direction of the endoscope body.

[0013] Furthermore, the second linkage mechanism includes a first pendulum block, a second pendulum block, and a third pendulum block; One end of the first swing block is rotatably connected to the first linkage block or the second linkage block via a fifth axis; One end of the second pendulum block is rotatably connected to the other end of the first pendulum block via a sixth axis; One end of the third pendulum block is rotatably connected to the other end of the second pendulum block via a seventh axis; The other end of the third swing block is rotatably connected to the other end of the gear drive handle via the eighth shaft; The fifth axis and the sixth axis are both parallel to the first axis, and the seventh axis and the eighth axis are both parallel to the length direction of the endoscope body.

[0014] Furthermore, the gear set includes a driving gear and a driven gear that mesh with each other; The pitch circle diameter of the driving gear is larger than that of the driven gear. The driven gear is connected to the optical fiber conduit; The drive gear is connected to the gear drive handle.

[0015] Furthermore, the endoscope body is connected to a limiting device; The limiting member is provided with a limiting hole for the optical fiber conduit to move through; This ensures that the fiber optic conduit is parallel to the endoscope body.

[0016] As can be seen from the above technical solutions, the endoscope handpiece with side-fiber optic channel designed in this application has the following beneficial effects: 1. The second control mechanism drives the first control body to move along the length of the endoscope body through the first linkage mechanism. Simultaneously, the movement of the first linkage mechanism is transmitted to the first control mechanism through the second linkage mechanism, causing the fiber optic tube and fiber optic body to rotate synchronously. The operator can simultaneously achieve axial advance and retraction and circumferential rotation with a single operation, reducing the steps of switching between two independent adjustment mechanisms.

[0017] 2. The optical fiber output port forms a composite motion trajectory with axial displacement and circumferential rotation components along with the optical fiber body, enabling the side-emitted laser to continuously cover a larger target area, reducing the possibility of local repeated irradiation or missed irradiation, and improving the traversal efficiency of cutting, vaporizing or pulverizing target lesions.

[0018] 3. The locking assembly can form a circumferential clamp on the optical fiber body, keeping the optical fiber body and the optical fiber guide tube relatively fixed during the linkage process, ensuring that the axial movement and rotation of the optical fiber guide tube can be reliably transmitted to the optical fiber body; the clamp can be released after the locking head is removed, making it convenient to replace the optical fiber body.

[0019] 4. The first and second linkage blocks, which are set at an angle, together with multiple cooperating swing blocks, form a mechanical linkage transmission chain. This chain can convert the operation of the second control mechanism into the axial displacement of the first control body and the swing of the gear drive handle, respectively. The structure is compact and does not require separate operating ends for the two movements.

[0020] 5. The pitch circle diameter of the driving gear is larger than that of the driven gear, which can amplify the small swing angle of the gear drive handle into a larger rotation angle of the optical fiber guide tube, thereby expanding the circumferential scanning range of the optical fiber output port within the limited handpiece operation stroke. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A perspective view of an endoscope handpiece with a side-fiber optic tube provided in this application; Figure 2 This is a first partial three-dimensional view of an endoscope handpiece with a side-fiber optic tube provided in this application; Figure 3 This is a second partial structural cross-sectional view of an endoscope handpiece with a side-fiber optic tube provided in this application; Figure 4 This is a third partial perspective view of an endoscope handpiece with a side-fiber optic tube provided in this application; Figure 5 This is a fourth partial structural cross-sectional view of an endoscope handpiece with a side-fiber optic tube provided in this application; Figure 6 This is a fifth partial three-dimensional view of an endoscope handpiece with a side-fiber optic tube provided in this application; Figure 7 This is a sixth partial three-dimensional view of an endoscope handpiece with a side-fiber optic tube provided in this application; In the diagram: 1. Endoscope body; 2. Fiber optic conduit; 3. Fiber optic cable; 31. Fiber optic outlet; 4. First control component; 41. First control body; 411. First through hole; 412. Second through hole; 413. Stop; 42. First control mechanism; 421. Gear set; 4211. Driving gear; 4212. Driven gear; 422. Gear drive handle; 5. Second control component; 51. Second control body; 52. Second control mechanism; 521. Connecting handle; 522. Operating handle; 523. Reset elastic element; 6. First linkage mechanism 61. First linkage block; 62. Second linkage block; 7. Second linkage mechanism; 71. First swing block; 72. Second swing block; 73. Third swing block; 8. Locking assembly; 81. Lock sleeve; 811. Stop part; 82. Lock head; 821. Claw; 83. Locking elastic element; 84. Guide part; 841. Conical guide cavity; 9. Limiting element; 91. Limiting hole; 101. First shaft; 102. Second shaft; 103. Third shaft; 104. Fourth shaft; 105. Fifth shaft; 106. Sixth shaft; 107. Seventh shaft; 108. Eighth shaft. Detailed Implementation

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

[0024] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a replaceable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0026] This application discloses an endoscope handpiece with a side-firing fiber optic tube.

[0027] Please see Figure 1 One embodiment of an endoscope handpiece with a side-fiber optic cable provided in this application includes: The endoscope body 1, fiber optic conduit 2, fiber optic body 3, first control component 4, second control component 5, first linkage mechanism 6, and second linkage mechanism 7.

[0028] The endoscope body 1 forms the main support base for the handpiece, and its length direction generally aligns with the direction in which the handpiece extends towards the endoscope's working channel during use. The endoscope body 1 can adopt the main structure of existing endoscope handpieces used for holding, connecting the endoscope, or forming the instrument channel. This application does not impose additional limitations on the imaging, illumination, irrigation, or other existing functional structures inside the endoscope body 1. Both the first control component 4 and the second control component 5 use the endoscope body 1 as their mounting base, thereby establishing a stable relative positional relationship between each control component and the handpiece.

[0029] The first control component 4 is movably mounted on the endoscope body 1 along its length. "Movably mounted along its length" means that the first control component 4 can be displaced relative to the endoscope body 1 in the length direction. The first control component 4 includes a first control body 41 and a first control mechanism 42 mounted on the first control body 41. The first control body 41 supports the first control mechanism 42 and serves as an axially movable component driven by the first linkage mechanism 6.

[0030] The fiber optic conduit 2 is also movably mounted on the endoscope body 1 along its length. One end of the fiber optic conduit 2 passes through the first control body 41 and is able to rotate relative to the first control body 41. Thus, when the first control body 41 moves along the endoscope body 1, it can synchronously drive the fiber optic conduit 2 to generate axial displacement, while the fiber optic conduit 2 retains rotational freedom relative to the first control body 41, allowing axial movement and circumferential rotation to be superimposed on the same fiber optic conduit 2. The fiber optic conduit 2 can be used to provide support, guidance, and motion transmission for the flexible fiber optic body 3, avoiding uncertain bending that occurs when only the flexible fiber optic body 3 is pulled.

[0031] One end of the optical fiber body 3 extends into the optical fiber conduit 2 from the end closest to the operator and extends out from the other end of the optical fiber conduit 2 closest to the treatment site. The portion of the optical fiber body 3 extending out of the optical fiber conduit 2 is provided with an optical fiber exit port 31. The optical fiber exit port 31 can change the direction of laser beam propagation through an optical reflecting surface, a refractive surface, a steering element, or an existing side-emitting fiber end structure, causing the laser to be emitted laterally relative to the axis of the optical fiber body 3. Depending on the actual treatment needs, the angle between the side-emitting direction and the axis of the optical fiber body 3 can be 90°, 60°, or 30°, etc., and the specific angle does not constitute a limitation on the linkage structure of this application.

[0032] The first control mechanism 42 is connected to the fiber optic conduit 2 via a transmission mechanism. After receiving driving force, the first control mechanism 42 causes the fiber optic conduit 2 to rotate around its own axis. The fiber body 3 rotates accordingly while maintaining a motion connection with the fiber optic conduit 2, thereby changing the circumferential orientation of the fiber optic outlet 31. The first control mechanism 42 can employ a mechanical transmission structure capable of converting input motion into rotation of the fiber optic conduit 2. Its core function is to receive the motion transmitted by the second linkage mechanism 7 and output rotation to the fiber optic conduit 2.

[0033] The second control component 5 is installed on the endoscope body 1, including a second control body 51 and a second control mechanism 52 installed on the second control body 51. The second control mechanism 52 constitutes the input terminal for the operator to perform linkage operations. The second control mechanism 52 is connected to the first control body 41 through a first linkage mechanism 6. When the operator causes the second control mechanism 52 to perform a predetermined operation, the first linkage mechanism 6 converts the operation movement into movement of the first control body 41 along the length direction of the endoscope body 1. The first control body 41 then drives the fiber optic conduit 2 and the fiber optic body 3 to move forward or backward along this length direction to adjust the axial position of the fiber optic outlet 31 relative to the treatment site.

[0034] The second linkage mechanism 7 is connected between the first linkage mechanism 6 and the first control mechanism 42. During the transmission of axial driving force, at least a portion of the components of the first linkage mechanism 6 will oscillate or displace. The second linkage mechanism 7 receives input from this moving component and transmits it to the first control mechanism 42, causing the first control mechanism 42 to drive the fiber optic conduit 2 to rotate simultaneously with the axial movement of the first control body 41. Thus, a single operation of the second control mechanism 52 outputs two types of motion through two interconnected transmission paths: the first path outputs axial displacement to the first control body 41 via the first linkage mechanism 6; the second path outputs rotation to the fiber optic conduit 2 sequentially via the first linkage mechanism 6, the second linkage mechanism 7, and the first control mechanism 42.

[0035] It should be noted that the aforementioned "synchronization" does not require that the axial displacement and rotation angle maintain a strict linear ratio at any given moment, nor does it require that the two movements start or end at exactly the same instant. As long as a single continuous operation of the second control mechanism 52 can cause the fiber optic body 3 to simultaneously or concurrently generate axial displacement and circumferential rotation through a common linkage, the synchronous linkage effect of this application can be achieved. The length, included angle, connection position, or transmission ratio of the transmission component can be selected according to the size of the handpiece, the required axial stroke, and the required rotation angle.

[0036] In use, the fiber optic body 3 is first inserted into the fiber optic conduit 2, with the end having the fiber optic outlet 31 extending from the treatment end of the fiber optic conduit 2. After aligning the endoscope handpiece with the corresponding endoscope body or working channel, the operator holds the endoscope body 1 and operates the second control mechanism 52. When the second control mechanism 52 moves in the first operating direction, the first linkage mechanism 6 drives the first control body 41, the fiber optic conduit 2, and the fiber optic body 3 to move forward or backward; simultaneously, the second linkage mechanism 7 transmits the movement of the first linkage mechanism 6 to the first control mechanism 42, causing the fiber optic conduit 2 and the fiber optic body 3 to rotate around their axis. When the second control mechanism 52 moves in the opposite direction, the direction of axial movement and rotation changes accordingly.

[0037] Because the axial position and circumferential orientation of the fiber optic output port 31 change synchronously, the fiber optic output port 31 can form a continuous spatial motion trajectory with both axial and circumferential components relative to the target tissue. When the transmission relationship of the specific mechanism is relatively uniform, this trajectory can be approximately spiral or other continuous curves. The side-firing laser energy can thus move continuously within the lesion area, allowing the operator to complete tissue processing at different axial and circumferential positions with fewer movements, improving the efficiency of cutting, vaporizing, or pulverizing target lesions.

[0038] The key to this embodiment is not that the first control mechanism 42, the first linkage mechanism 6, and the second linkage mechanism 7 must adopt a single form, but rather that a coordinated transmission relationship is established, uniformly triggered by the second control mechanism 52. As long as the second control mechanism 52 can drive the first control body 41 to move axially through the first linkage mechanism 6, and the movement of the first linkage mechanism 6 can synchronously drive the first control mechanism 42 to rotate the fiber optic conduit 2 through the second linkage mechanism 7.

[0039] The above is Embodiment 1 of an endoscope handpiece with a side-emitting fiber optic cable provided in this application. The following is Embodiment 2 of an endoscope handpiece with a side-emitting fiber optic cable provided in this application. Please refer to the following for details. Figures 1 to 7 .

[0040] Based on the above-described Embodiment 1: Furthermore, such as Figure 2As shown, the first control body 41 has a first through hole 411 and a second through hole 412 extending through itself. The first through hole 411 allows the endoscope body 1 to move through, enabling the first control body 41 to move along its length with the endoscope body 1 as a guide; the second through hole 412 allows the fiber optic conduit 2 to pass through and provides installation space for the rotation of the fiber optic conduit 2 relative to the first control body 41. The first through hole 411 and the second through hole 412 can be arranged side by side according to the relative arrangement of the endoscope body 1 and the fiber optic conduit 2, so that the fiber optic conduit 2 remains substantially parallel to the endoscope body 1 when the first control body 41 moves.

[0041] To enable the first control body 41 to move smoothly, the wall of the first through hole 411 can form a sliding fit with the outer surface of the endoscope body 1. The second through hole 412 can provide a rotational support for the fiber optic conduit 2 through a bushing, bearing, or a hole wall with a low-friction surface. The above support forms are all basic structures for realizing insertion, guidance, and relative rotation, and do not change the basic relationship of the second through hole 412 allowing the fiber optic conduit 2 to pass through and rotate.

[0042] Furthermore, such as Figure 3 As shown, it also includes a locking component 8, which is installed at the end of the fiber optic conduit 2 closest to the operator. The locking component 8 restricts the axial movement and circumferential rotation of the fiber optic body 3 relative to the fiber optic conduit 2. After locking, when the fiber optic conduit 2 is moved axially by the first control body 41, the fiber optic body 3 moves along with the fiber optic conduit 2; when the first control mechanism 42 drives the fiber optic conduit 2 to rotate, the fiber optic body 3 also rotates accordingly. Thus, the actual movement of the fiber optic outlet 31 is consistent with the linked movement of the fiber optic conduit 2. After releasing the locking component 8, the fiber optic body 3 can be pulled out of the fiber optic conduit 2 for replacement when it reaches its usage limit, experiences wear, or needs to be replaced with a fiber at a different side-emitting angle.

[0043] Furthermore, such as Figure 3 As shown, the locking assembly 8 includes a locking sleeve 81, a locking head 82, and a locking elastic member 83. One end of the optical fiber conduit 2 extends into the interior of the locking sleeve 81 from one end, and the portion of the optical fiber conduit 2 extending into the locking sleeve 81 is provided with a guide portion 84. The guide portion 84 can be fixedly connected to the optical fiber conduit 2 or integrally formed therein, and can move along the inner wall of the locking sleeve 81. A stop portion 811 is formed at one end of the locking sleeve 81, and the locking elastic member 83 is located between the stop portion 811 and the guide portion 84, with one end of the locking elastic member 83 abutting against the stop portion 811 and the other end abutting against the guide portion 84.

[0044] The locking head 82 is detachably mounted on the other end of the locking sleeve 81. Detachable mounting means that the locking head 82 can establish a removable connection with the locking sleeve 81, for example, by inserting and then screwing, inserting and then snapping, or other reusable connection methods. The end of the locking head 82 that extends into the locking sleeve 81 has multiple circumferentially distributed claws 821, each claw 821 forming a clamping channel through which the optical fiber body 3 passes. The circumferential distribution of multiple claws 821 allows the clamping force to be applied more evenly to the outer periphery of the optical fiber body 3, reducing the possibility of eccentricity caused by unilateral compression.

[0045] The guide section 84 is provided with a tapered guide cavity 841. The inner diameter of the tapered guide cavity 841 gradually changes along the insertion direction of the claw 821. When the locking head 82 is connected to the locking sleeve 81, the compressed locking elastic member 83 applies a force to the guide section 84 and the stop section 811, causing the locking sleeve 81 to move relative to the guide section 84, so that the claw 821 and the guide section 84 are axially pressed together. Each claw 821 extends into the tapered guide cavity 841 and retracts towards the optical fiber body 3 under the radial component force of the tapered cavity wall, thereby forming a clamping lock on the optical fiber body 3. The locking elastic member 83 can be a compression spring, which can use a mature axial elastic loading method to continuously maintain the clamping force and compensate for assembly errors or minor wear during use.

[0046] When disassembling the fiber optic body 3, remove the locking head 82 from the locking sleeve 81 or retract the locking head 82 to the released position. The chuck 821 disengages from the tightening area of ​​the tapered guide cavity 841, releasing the fiber optic body 3. At this point, the old fiber optic body 3 can be pulled out of the fiber optic conduit 2, and the new fiber optic body 3 can be inserted. After reconnecting the locking head 82, the chuck 821 retracts again under the action of the tapered guide cavity 841 and completes the locking. The entire replacement process does not require the removal of the first control component 4 and the second control component 5.

[0047] Furthermore, such as Figure 4 As shown, one end of the second control body 51 is rotatably connected to the endoscope body 1 via a first shaft 101, which is perpendicular to the length direction of the endoscope body 1. The second control body 51 is thus able to swing relative to the endoscope body 1 and provides a mounting or support position for the second control mechanism 52 and related linkage components. The first shaft 101 being perpendicular to the length direction of the endoscope body 1 facilitates the conversion of operator actions applied to the handpiece side into swinging motions within a plane encompassing the length direction of the endoscope body 1.

[0048] The second control mechanism 52 includes a connecting handle 521 and an operating handle 522. One end of the connecting handle 521 is rotatably connected to the other end of the second control body 51 via a second shaft 102, and the other end of the connecting handle 521 is connected to the operating handle 522. The second shaft 102 is parallel to the first shaft 101, allowing the connecting handle 521, the second control body 51, and the subsequent first linkage mechanism 6 to rotate within a mutually coordinated plane. The operating handle 522, as the part where the operator directly applies force, can be positioned to facilitate pushing, pulling, or flipping with the fingers. The connecting handle 521 transmits the movement of the operating handle 522 to the first linkage mechanism 6, while simultaneously allowing the second control mechanism 52 to oscillate adaptively relative to the second control body 51, avoiding jamming caused by rigid linear transmission.

[0049] Furthermore, such as Figure 4 As shown, the first linkage mechanism 6 includes a first linkage block 61 and a second linkage block 62 fixedly connected, which are arranged at an angle. This angle allows the first linkage mechanism 6 to form a folding force transmission structure, for example, the whole is inverted V-shaped. The end of the first linkage block 61 away from the second linkage block 62 is rotatably connected to the connecting handle 521 through a third shaft 103; the end of the second linkage block 62 away from the first linkage block 61 is rotatably connected to the first control body 41 through a fourth shaft 104. Both the third shaft 103 and the fourth shaft 104 are parallel to the first shaft 101, so that each hinge point can achieve planar movement under the constraint of mutually parallel axes.

[0050] When the connecting handle 521 moves under the drive of the operating handle 522, the input at the third axis 103 causes the fixedly connected first linkage block 61 and second linkage block 62 to swing as a whole. The second linkage block 62 then applies a pushing or pulling force along the length direction of the endoscope body 1 to the first control body 41 through the fourth axis 104. Since the first control body 41 is guided by the endoscope body 1, its non-axial component in motion is constrained by the guiding relationship, and the main output is displacement along the length direction. By changing the included angle between the first linkage block 61 and the second linkage block 62, the length of each linkage block, and the positions of the third axis 103 and the fourth axis 104, the required operating stroke and fiber optic axial stroke can be matched.

[0051] Furthermore, such as Figure 4 As shown, a reset elastic element 523 is provided between the connecting handle 521 and the operating handle 522. The reset elastic element 523 can be a torsion spring and can be arranged at the connection position or corresponding rotation position of the connecting handle 521 and the operating handle 522. When the operator performs a forward or backward operation, the reset elastic element 523 undergoes elastic deformation and stores energy; when the operator releases the operating force, the reset elastic element 523 releases the energy, causing the second control mechanism 52 to return to the predetermined initial position or intermediate position. The reset structure can reduce the operator's active reverse flicking action and ensure that each operation has a more consistent starting state.

[0052] Furthermore, the first control body 41 can adopt a box structure, with a mounting cavity formed inside the box. The mounting cavity is used to accommodate the gear set 421, so that the gear set 421 is protected by the first control body 41 and the relative center distance of each gear is maintained. The box structure of the first control body 41 also facilitates the integration of axial sliding bearing, gear mounting, and external linkage connection into the same component, improving the structural integration. The box can be formed by interconnected shell parts to assemble and maintain the gear set 421, but the specific split form is not limited.

[0053] like Figure 5 As shown, the first control mechanism 42 includes a gear set 421 and a gear drive handle 422. The gear set 421 is installed inside the mounting cavity of the first control body 41 and connected to the optical fiber conduit 2 passing through the first control body 41. The gear drive handle 422 is located outside the first control body 41, with one end extending into or connected to the gear set 421 inside the mounting cavity, for inputting rotation to the gear set 421. The rotation center line of the gear set 421 is parallel to the length direction of the endoscope body 1, so the rotation output by the gear set 421 can be transmitted directly or via a coaxial connection to the optical fiber conduit 2 extending along this length direction.

[0054] The gear drive handle 422 can swing around an axis that is aligned with or related to the rotation center line of the gear set 421. When the second linkage mechanism 7 pushes the gear drive handle 422, the gear drive handle 422 drives the gear set 421 to rotate; when the second linkage mechanism 7 moves in the opposite direction, the gear drive handle 422 drives the gear set 421 to rotate in the opposite direction. During the movement of the first control body 41 along the axial direction of the endoscope body 1, the gear set 421 and the gear drive handle 422 move together with the first control body 41, thus the first control mechanism 42 always maintains a transmission connection with the optical fiber conduit 2.

[0055] Furthermore, such as Figure 6 As shown, the second linkage mechanism 7 includes a first swing block 71, a second swing block 72, and a third swing block 73 connected in sequence. One end of the first swing block 71 is rotatably connected to either the first linkage block 61 or the second linkage block 62 via a fifth shaft 105. The specific connection position can be selected according to the spatial arrangement and the required direction of movement. The fifth shaft 105 is parallel to the first shaft 101, enabling the first swing block 71 to receive the swing or displacement generated by the first linkage mechanism 6 in its plane of motion. One end of the second swing block 72 is rotatably connected to the other end of the first swing block 71 via a sixth shaft 106, which is also parallel to the first shaft 101, thereby forming a planar linkage relationship between the first swing block 71 and the second swing block 72 with a changeable included angle.

[0056] One end of the third swing block 73 is rotatably connected to the other end of the second swing block 72 via the seventh axis 107, and the other end of the third swing block 73 is rotatably connected to the other end of the gear drive handle 422 via the eighth axis 108. Both the seventh axis 107 and the eighth axis 108 are parallel to the length direction of the endoscope body 1. By setting the first two hinge axes to be parallel to the first axis 101 and the last two hinge axes to be parallel to the length direction of the endoscope body 1, the second linkage mechanism 7 can change the direction of motion transmission within a limited space, so that the planar oscillation from the first linkage mechanism 6 is ultimately converted into the oscillation of the gear drive handle 422 around the gear rotation center line.

[0057] The first swing block 71, the second swing block 72, and the third swing block 73 are rotatably connected. During the axial movement of the first control body 41, the relative rotation between the swing blocks compensates for changes in the connection point position, thereby preventing excessive constraint of the second linkage mechanism 7 on the first control body 41. The length and initial included angle of each swing block can be determined according to the predetermined axial stroke, the required swing angle of the gear drive handle 422, and the available internal space of the handpiece. As long as the movement of the first linkage mechanism 6 can be synchronously transmitted to the gear drive handle 422, the conversion function can be achieved.

[0058] In addition, such as Figure 7 As shown, two circumferentially distributed blocks 413 can be provided outside the first control body 41 to limit the swing angle of the gear drive handle 422.

[0059] Furthermore, such as Figure 5 As shown, gear set 421 can be composed of a driving gear 4211 and a driven gear 4212, with the driving gear 4211 and driven gear 4212 meshing with each other. The driving gear 4211 is connected to a gear drive handle 422, and the driven gear 4212 is connected to the optical fiber conduit 2. The oscillation of the gear drive handle 422 first causes the driving gear 4211 to rotate, which in turn drives the driven gear 4212 to rotate. The driven gear 4212 then drives the optical fiber conduit 2 and the optical fiber body 3 to rotate. After the driving gear 4211 and driven gear 4212 mesh, their rotation directions are opposite. Specifically, the desired optical fiber rotation direction can be adapted by setting the operating direction of the gear drive handle 422.

[0060] The pitch circle diameter of the driving gear 4211 is larger than that of the driven gear 4212, therefore the rotational angular velocity of the driven gear 4212 is greater than that of the driving gear 4211. This transmission ratio can convert a smaller swing angle of the gear drive handle 422 into a larger rotation angle of the fiber optic catheter 2. For example, the pitch circle diameters of the two gears can be configured according to the swing stroke provided by the second linkage mechanism 7 and the circumferential scanning range required clinically, so that the fiber optic body 3 can achieve a near-360° circumferential rotation in a single operation. 360° is only an achievable example and is not limited to reaching this angle.

[0061] Furthermore, such as Figure 1 As shown, the endoscope body 1 is connected to a limiting member 9, which has a limiting hole 91 for the fiber optic conduit 2 to pass through. The limiting member 9 can be located on the side of the first control body 41 away from the locking assembly 8, or it can be set at other positions that can form auxiliary support, depending on the overhang length of the fiber optic conduit 2. The limiting hole 91 provides radial constraint on the fiber optic conduit 2, while allowing the fiber optic conduit 2 to move axially and rotate about its own axis.

[0062] The portion of the fiber optic conduit 2 furthest from the first control body 41 may tilt due to its own weight, the bending reaction force of the fiber optic body 3, or external tension. The limiting hole 91 and the second through hole 412 in the first control body 41 together provide spaced guidance for the fiber optic conduit 2, keeping it relatively parallel to the endoscope body 1 and reducing the impact of tilt on axial movement resistance and rotational stability. The diameter of the limiting hole 91 provides necessary radial restraint to the fiber optic conduit 2 while ensuring smooth movement and rotation.

[0063] One operation process of this embodiment is as follows: The optical fiber body 3 is passed sequentially through the locking head 82, the locking sleeve 81, and the optical fiber conduit 2, so that the optical fiber outlet 31 extends from the treatment end of the optical fiber conduit 2; the locking head 82 is connected to the locking sleeve 81, so that the clasp 821 holds the optical fiber body 3 tightly under the action of the tapered guide cavity 841. The operator then drives the operating handle 522, and the connecting handle 521 drives the first linkage block 61 and the second linkage block 62, which are set at an angle, to swing through the third axis 103. The second linkage block 62 pushes the first control body 41 to move along the endoscope body 1 through the fourth axis 104. At the same time, the first linkage block 61 or the second linkage block 62 drives the first swing block 71 through the fifth axis 105. The movement is transmitted sequentially through the second swing block 72 and the third swing block 73 to the gear drive handle 422, which drives the driving gear 4211, the driven gear 4212, and the optical fiber conduit 2 to rotate.

[0064] During the above process, the first control body 41, gear set 421, and fiber optic conduit 2 move together along the length of the endoscope body 1. The gear set 421 also causes the fiber optic conduit 2 to rotate relative to the first control body 41. The locking component 8 causes the fiber optic body 3 to move synchronously with the fiber optic conduit 2, and the limiting component 9 provides auxiliary constraint on the movement direction of the fiber optic conduit 2. Therefore, the fiber optic outlet 31 can stably form a combination of axial forward and backward movement and circumferential rotation. After the operation ends and the operating handle 522 is released, the reset elastic component 523 can cause the second control mechanism 52 to reset, providing consistent initial conditions for the next linkage operation.

[0065] When the fiber optic body 3 needs to be replaced, stop the endoscope handpiece and deactivate the laser output. Remove the locking head 82 to release the clamp 821 from the fiber optic body 3, pull out the old fiber optic body 3, insert the new fiber optic body 3, and reconnect the locking head 82. The replacement process does not require disassembling the gear set 421 inside the first control body 41, nor does it require disassembling the first linkage mechanism 6 and the second linkage mechanism 7, which facilitates clinical preparation and maintenance.

[0066] The above provides a detailed description of an endoscope handpiece with a side-fiber optic channel provided in this application. For those skilled in the art, based on the ideas of the embodiments of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An endoscope handpiece with a side-fiber optic cable, characterized in that, It includes an endoscope body (1), an optical fiber conduit (2), an optical fiber body (3), a first control component (4), a second control component (5), a first linkage mechanism (6), and a second linkage mechanism (7); The first control component (4) is movably mounted on the endoscope body (1) along the length direction of the endoscope body (1). The first control component (4) includes a first control body (41) and a first control mechanism (42) mounted on the first control body (41). The fiber optic conduit (2) is movably installed on the endoscope body (1) along the length direction of the endoscope body (1), and one end of the fiber optic conduit (2) passes through the first control body (41) and can rotate relative to the first control body (41); One end of the optical fiber body (3) extends into the optical fiber conduit (2) through one end and extends out through the other end of the optical fiber conduit (2). The part of the optical fiber body (3) extending out of the optical fiber conduit (2) is provided with an optical fiber output port (31) for lateral laser emission. The first control mechanism (42) is connected to the optical fiber conduit (2) for driving the optical fiber conduit (2) to rotate, thereby driving the optical fiber body (3) to rotate; The second control component (5) is installed on the endoscope body (1). The second control component (5) includes a second control body (51) and a second control mechanism (52) installed on the second control body (51). The second control mechanism (52) is connected to the first control body (41) through the first linkage mechanism (6) and is used to drive the first control body (41), the optical fiber conduit (2) and the optical fiber body (3) to move along the length direction of the endoscope body (1). The second linkage mechanism (7) is connected between the first linkage mechanism (6) and the first control mechanism (42). When the first linkage mechanism (6) drives the first control body (41) to move, it synchronously transmits the movement of the first linkage mechanism (6) to the first control mechanism (42) so as to synchronously drive the optical fiber guide tube (2) and the optical fiber body (3) to rotate.

2. The endoscope handpiece with a side-fiber optic cable according to claim 1, characterized in that, The first control body (41) is provided with a first through hole (411) and a second through hole (412) penetrating through itself. The first through hole (411) allows the endoscope body (1) to move through; The second through hole (412) allows the optical fiber conduit (2) to pass through; The endoscope handpiece also includes a locking assembly (8); The locking component (8) is installed at one end of the optical fiber conduit (2) to lock the movement of the optical fiber body (3) relative to the optical fiber conduit (2).

3. An endoscope handpiece with a side-fiber optic cable according to claim 2, characterized in that, The locking assembly (8) includes a lock sleeve (81), a lock head (82), and a locking elastic element (83); One end of the optical fiber conduit (2) extends into the locking sleeve (81) through one end of the locking sleeve (81); The portion of the optical fiber conduit (2) that extends into the locking sleeve (81) is provided with a guide portion (84). One end of the lock sleeve (81) is provided with a stop (811); The locking elastic element (83) is disposed between the locking sleeve (81) and the optical fiber conduit (2), and one end of the locking elastic element (83) contacts the stop part (811) and the other end contacts the guide part (84); The lock head (82) is pluggably installed at the other end of the lock sleeve (81), and the end of the lock head (82) that extends into the lock sleeve (81) is provided with a plurality of claws (821) distributed in the circumferential direction. The guide part (84) is provided with a tapered guide cavity (841); When the lock head (82) is connected to the lock sleeve (81), each of the claws (821) extends into the tapered guide cavity (841) under the action of the locking elastic member (83), and radially contracts under the guidance of the tapered guide cavity (841) to clamp the optical fiber body (3) passing through the claw (821).

4. An endoscope handpiece with a side-fiber optic cable according to claim 1, characterized in that, One end of the second control body (51) is rotatably connected to the endoscope body (1) via a first shaft (101); The first axis (101) is perpendicular to the length direction of the endoscope body (1); The second control mechanism (52) includes a connecting handle (521) and an operating handle (522); One end of the connecting handle (521) is rotatably connected to the other end of the second control body (51) via a second shaft (102); The other end of the connecting handle (521) is connected to the operating handle (522); The second axis (102) is parallel to the first axis (101).

5. An endoscope handpiece with a side-fiber optic cable according to claim 4, characterized in that, The first linkage mechanism (6) includes a first linkage block (61) and a second linkage block (62) that are fixedly connected and arranged at an angle. The end of the first linkage block (61) away from the second linkage block (62) is rotatably connected to the connecting handle (521) via a third shaft (103); The end of the second linkage block (62) away from the first linkage block (61) is rotatably connected to the first control body (41) via the fourth shaft (104); The third axis (103) and the fourth axis (104) are both parallel to the first axis (101).

6. An endoscope handpiece with a side-fiber optic cable according to claim 4, characterized in that, A reset elastic element (523) is provided between the connecting handle (521) and the operating handle (522); The reset elastic element (523) is used to drive the second control mechanism (52) to reset after the forward or backward operation of the operating handle (522) is completed.

7. An endoscope handpiece with a side-fiber optic cable according to claim 5, characterized in that, The first control mechanism (42) includes a gear set (421) and a gear drive handle (422). The gear set (421) is installed inside the first control body (41) and connected to the optical fiber conduit (2) passing through the first control body (41); The gear drive handle (422) is disposed outside the first control body (41), and one end of the gear drive handle (422) is connected to the gear set (421) to drive the gear set (421) to rotate; The rotation center line of the gear set (421) is parallel to the length direction of the endoscope body (1).

8. An endoscope handpiece with a side-fiber optic cable according to claim 7, characterized in that, The second linkage mechanism (7) includes a first swing block (71), a second swing block (72), and a third swing block (73); One end of the first swing block (71) is rotatably connected to the first linkage block (61) or the second linkage block (62) via the fifth axis (105); One end of the second pendulum block (72) is rotatably connected to the other end of the first pendulum block (71) via a sixth shaft (106); One end of the third pendulum block (73) is rotatably connected to the other end of the second pendulum block (72) via the seventh shaft (107); The other end of the third swing block (73) is rotatably connected to the other end of the gear drive handle (422) via the eighth shaft (108); The fifth axis (105) and the sixth axis (106) are both parallel to the first axis (101), and the seventh axis (107) and the eighth axis (108) are both parallel to the length direction of the endoscope body (1).

9. An endoscope handpiece with a side-fiber optic cable according to claim 7, characterized in that, The gear set (421) includes a driving gear (4211) and a driven gear (4212) that mesh with each other. The pitch circle diameter of the driving gear (4211) is larger than that of the driven gear (4212); The driven gear (4212) is connected to the optical fiber conduit (2); The drive gear (4211) is connected to the gear drive handle (422).

10. An endoscope handpiece with a side-fiber optic cable according to claim 1, characterized in that, The endoscope body (1) is connected to a limiting member (9); The limiting member (9) is provided with a limiting hole (91) through which the optical fiber conduit (2) can move. So that the fiber optic conduit (2) is kept parallel to the endoscope body (1).

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