Rotatable secondary coupling device and laser fiber conduit thereof

Abstract

The invention discloses a rotary shrinkage type secondary coupling device and a laser fiber conduit thereof, the rotary shrinkage type secondary coupling device comprises a mounting seat, a first mounting cylinder and a second mounting cylinder, the first mounting cylinder and the second mounting cylinder are fixedly connected to two sides of the mounting seat, and a rotary sleeve assembly is rotatably mounted in the first mounting cylinder to clamp a large-core-diameter fiber group. A sliding sleeve assembly is slidably sleeved with the second installation cylinder, a small-core-diameter optical fiber set is clamped, and the laser overlapping area of a laser optical fiber guide pipe in the rotary sleeve assembly and a laser optical fiber guide pipe in the sliding sleeve assembly is controlled by rotating the rotary sleeve assembly. And the telescopic distance adjusting assembly is used for controlling and adjusting the distance between the laser optical fiber guide pipe in the rotary sleeve assembly and the laser optical fiber guide pipe in the sliding sleeve assembly, so that controllable coupling of the large-core-diameter optical fiber group and the small-core-diameter optical fiber group is realized, and coupling of various types of small-core-diameter optical fiber groups can be conveniently and quickly adapted. And moreover, while the passing ability and the treatment effect of the catheter are ensured, the large-core-diameter optical fiber group can be repeatedly used only by abandoning the small-core-diameter optical fiber group part, so that the cost of an anti-ultraviolet optical fiber material is greatly saved.

Description

Technical Field

[0001] The present invention belongs to the technical field of laser ablation, and particularly relates to a retractable secondary coupling device and its laser fiber catheter. Background Art

[0002] In the existing excimer laser treatment equipment, laser fiber catheters of different models and specifications are required to adapt to different blood vessel diameters for intravascular lesion ablation treatment. For some special models and specifications of small-core-diameter laser fiber catheters, an optical path coupling device is usually used for coupling. However, its coupling adaptation requirements are relatively high, and the optical path coupling distance in the excimer laser treatment equipment needs to be finely adjusted so that the coupling light spot meets the preset requirements to complete the coupling adaptation with the special models and specifications of small-core-diameter laser fiber catheters. At present, the adjustment of the optical path coupling distance of the existing excimer laser treatment equipment is cumbersome. When it is necessary to replace the above-mentioned special models and specifications of laser fiber catheters during the operation, it may be necessary to re-adjust the coupling distance during use. The operation is time-consuming and troublesome, greatly increasing the operation time and operation risk.

[0003] In addition, the fiber catheter for conducting excimer laser needs to use ultraviolet-resistant fiber. Its special materials and complex processes result in extremely high costs, with a price of dozens to hundreds of yuan per meter, which is dozens of times that of ordinary fibers, and it is completely dependent on imports. As a disposable medical consumable, one end of the catheter is configured with a coupling plug for coupling and docking with the excimer laser treatment equipment, and the other end of the catheter enters the lesion in the human blood vessel for laser ablation treatment. After use, the entire laser fiber catheter needs to be discarded. Multiple different models and specifications of laser fiber catheters may be used during one operation, and the cost of the laser fiber catheters consumed in one operation is relatively expensive, which will cause certain resource waste to patients and the medical system. Summary of the Invention

[0004] The purpose of the present invention is to provide a retractable secondary coupling device and its laser fiber catheter to solve the problems raised in the above background art.

[0005] To achieve the above object, the present invention provides the following technical solution: a retractable secondary coupling device and its laser fiber catheter, including a mounting base, a first mounting cylinder and a second mounting cylinder fixedly connected to both sides of the mounting base. A swivel assembly is rotatably installed inside the first mounting cylinder. Clamping parts one are equidistantly arranged on the inner wall of the swivel assembly. A rotation driving part and a hydraulic control part are respectively arranged on the outer side surface of the first mounting cylinder. The rotation driving part controls the rotation of the swivel assembly. The hydraulic control part fixes the laser fiber catheter sleeved in the swivel assembly through the clamping parts one. A sliding sleeve assembly is slidably sleeved inside the second mounting cylinder. Clamping parts two are equidistantly arranged on the outer side surface of the sliding sleeve assembly. An expansion and distance adjustment assembly is arranged on the top of the second mounting cylinder. The expansion and distance adjustment assembly controls the horizontal reciprocating movement of the sliding sleeve assembly. The expansion and distance adjustment assembly controls the clamping parts two to automatically clamp the laser fiber catheter in the sliding sleeve assembly. Positioning rings are fixedly arranged inside both the swivel assembly and the sliding sleeve assembly. By rotating the swivel assembly, the laser overlapping area between the laser fiber catheter inside it and the laser fiber catheter inside the sliding sleeve assembly is controlled, and the distance between the laser fiber catheter inside the swivel assembly and the laser fiber catheter inside the sliding sleeve assembly is controlled and adjusted by the expansion and distance adjustment assembly.

[0006] Preferably, the swivel assembly includes a swivel body, an internal reserved cavity and an adapter port. A clamping ring is fixedly sleeved on the outer side surface of the swivel body. An annular cavity is provided on the inner wall of the first mounting cylinder. The clamping ring is rotatably sleeved in the arc-shaped cavity. The internal reserved cavity is opened inside the swivel body. The adapter port is opened on the inner wall of the swivel body and is communicated with the internal reserved cavity. A side port is provided on the outer side surface of the swivel body, and the internal reserved cavity is communicated with the annular cavity through the side port.

[0007] Preferably, the clamping part one includes an arc-shaped clamping plate one, a fixed sleeve and a movable block. The arc-shaped clamping plate one is adapted in the adapter port. The fixed sleeve is fixed in the internal reserved cavity. One end of the movable block is fixedly connected to the arc-shaped clamping plate one, and the movable block is elastically connected in the fixed sleeve through a first spring. The fixed sleeve is communicated with the annular cavity.

[0008] Preferably, the rotation driving part includes a first motor, a first gear and a second gear. The first gear is fixedly sleeved on the output shaft of the first motor. The second gear is fixedly sleeved on the outer side surface of the swivel body, and the second gear is meshed and connected with the first gear.

[0009] Preferably, the hydraulic control part includes a fixed cylinder, an adjusting rod and a piston plate. The fixed cylinder is fixed on the outer side of the first mounting cylinder and is communicated with the annular cavity. The piston plate is movably sleeved in the fixed cylinder. One end of the adjusting rod movably passes through the fixed cylinder and extends into the fixed cylinder. The inner end of the die-cutting adjusting rod is fixedly connected to the piston plate. The piston plate is elastically connected in the fixed cylinder through a second spring. The fixed cylinder is filled with lubricating oil.

[0010] Preferably, the sliding sleeve assembly includes a sliding sleeve body, an outer groove, an adapter cavity, and a slider. The slider is fixedly connected in the sliding sleeve body. A sliding groove is formed on the outer side surface of the second mounting cylinder. The slider is slidably sleeved in the sliding groove. The adapter cavity is formed on the inner wall of the sliding sleeve body. The outer groove is formed on the outer side surface of the sliding sleeve body. The outer grooves and the adapter cavities correspond to each other one by one, and the outer grooves and the sliding grooves correspond to each other one by one.

[0011] Preferably, the second clamping part includes a movable frame, an arc-shaped clamping plate II, a connecting rod, and an inclined surface. The movable frame is elastically connected in the outer groove through a third spring. The arc-shaped clamping plate II is properly sleeved in the adapter cavity. The connecting rod is fixedly connected between the arc-shaped clamping plate II and the movable frame. The inclined surface is formed on the movable frame and is close to the left end of the sliding groove.

[0012] Preferably, the telescopic distance adjustment component includes a bracket, a lead screw, a second motor, and a movable connection block. The lead screw is rotatably arranged in the bracket. The second motor controls the forward and reverse rotation of the lead screw. The movable connection block is threadedly sleeved on the outer surface of the lead screw. The movable connection block is fixed on the slider of the sliding sleeve assembly.

[0013] A laser fiber catheter applied to the retractable secondary coupling device described above. The laser fiber catheter includes a large-core-diameter fiber group, a small-core-diameter fiber group, and the above-mentioned retractable secondary coupling device. The large-core-diameter fiber group is sleeved inside the rotating sleeve assembly. The small-core-diameter fiber group is sleeved in the sliding sleeve assembly. The large-core-diameter fiber group includes a catheter sleeve I and large-core-diameter optical fibers arranged in the catheter sleeve I. The small-core-diameter fiber group includes a catheter sleeve II and a small-core-diameter fiber bundle arranged in the catheter sleeve II. The number of large-core-diameter optical fibers is not less than a certain number and is distributed around the circumference of the axis of the large-core-diameter fiber group. The number of small-core-diameter fiber bundles is not less than a certain number and is distributed around the circumference of the axis of the small-core-diameter fiber group. Each large-core-diameter optical fiber is coaxial with each small-core-diameter fiber bundle.

[0014] Preferably, at least one positioning groove or positioning protrusion is provided on the circumference of the positioning ring of the rotating sleeve assembly. On the circumference of the end surface where the large-core-diameter fiber group contacts the positioning ring, the same number of matching positioning protrusions or positioning grooves are correspondingly provided; At least one positioning groove or positioning protrusion is provided on the circumference of the positioning ring of the sliding sleeve assembly. On the circumference of the end surface where the small-core-diameter fiber group contacts the positioning ring, the same number of matching positioning protrusions or positioning grooves are correspondingly provided.

[0015] The beneficial effects of the present invention are as follows: (1) In the present invention, the laser fiber catheter is divided into a large-core-diameter fiber group and a small-core-diameter fiber group, and the large-core-diameter fiber group and the small-core-diameter fiber group are combined and installed with a secondary coupling device. The large-core-diameter fiber group is fixedly installed on one side of the secondary coupling device through a swivel sleeve assembly and a clamping part 1, and the small-core-diameter fiber group is conveniently and detachably installed on the other side of the secondary coupling device through a sliding sleeve assembly and a telescopic distance adjustment assembly. At the same time, by utilizing the characteristics of the large-core-diameter fiber group, which has low adaptability difficulty and high transmission efficiency with the excimer laser treatment device, and the small-core-diameter fiber group, which can improve the passing performance of the catheter inside the human body and facilitate reaching the lesion under the guidance of a guide wire, the treatment effect is further improved. And after each use, only the small-core-diameter fiber group needs to be discarded while the large-core-diameter fiber group is retained, so as to achieve fast replacement and adaptation for continuous multiple times, greatly saving the cost of anti-ultraviolet fiber materials and having good use effects.

[0016] (2) In the present invention, by using the swivel sleeve assembly and the clamping part 1 in the secondary coupling device, after the socket installation of the large-core-diameter fiber group is completed, the rotation control of the large-core-diameter fiber group can be realized. Cooperating with the small-core-diameter fiber group fixedly installed at the other end, when the laser power required for different lesions is different, the large-core-diameter fiber group is deflected by rotating the swivel sleeve assembly, and the overlapping area between the light spot emitted by the large-core-diameter fiber in the large-core-diameter fiber group and the small-core-diameter fiber bundle in the small-core-diameter fiber group is controlled. By controlling the overlapping area of the light spots, the energy received by the small-core-diameter fiber group is further controlled, so as to achieve the effect of controlling the laser power at the output end of the laser fiber catheter, and it can be adjusted and controlled within a large range according to the actual use requirements.

[0017] (3) In the present invention, by using the telescopic distance adjustment assembly and the sliding sleeve assembly again, on the one hand, when the socket installation of the small-core-diameter fiber group is carried out, the telescopic distance adjustment assembly controls the sliding sleeve assembly to drive the internally damped socketed small-core-diameter fiber group to move. Cooperating with the second installation cylinder and the clamping part 2, the socketed small-core-diameter fiber group is automatically clamped and fixed when moving horizontally forward, and the clamping can be released when the telescopic distance adjustment assembly moves in the reverse direction, realizing the rapid disassembly of the small-core-diameter fiber group and facilitating timely replacement. On the other hand, after the automatic clamping is completed, the telescopic distance adjustment assembly further controls the forward and backward movement of the sliding sleeve assembly, and the coupling distance between the socketed small-core-diameter fiber group and the fixed large-core-diameter fiber group can be changed. For the small-core-diameter fiber bundle with a changed core diameter after replacement, the appropriate coupling distance is adjusted to adapt to the core diameter change, ensuring good coupling effects and coupling transmission efficiency during the use process. Brief Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a sectional schematic diagram of the present invention; Figure 3 is a sectional schematic diagram of the swivel sleeve assembly and the rotation driving part of the present invention; Figure 4 A cross-sectional schematic view of the sliding sleeve assembly of the present invention; Figure 5 An exploded schematic view of clamping part 1 of the present invention; Figure 6 An exploded schematic view of the hydraulic control part of the present invention; Figure 7 A cross-sectional schematic view of the first mounting cylinder of the present invention; Figure 8 A schematic view of the telescopic distance adjustment assembly and the second mounting cylinder of the present invention; Figure 9 A schematic view of clamping part 2 of the present invention; Figure 10 A schematic view of the large core diameter optical fiber group of the present invention; Figure 11 A schematic view of the small core diameter optical fiber group of the present invention Figure 1 ; Figure 12 A schematic view of the small core diameter optical fiber group of the present invention Figure 2 。

[0019] In the figure: 1, mounting base; 2, first mounting cylinder; 3, second mounting cylinder; 4, rotating sleeve assembly; 41, rotating sleeve body; 42, internal reserved cavity; 43, adapter port; 5, clamping part 1; 51, arc-shaped clamping plate 1; 52, fixing sleeve; 53, movable block; 6, large core diameter optical fiber group; 61, conduit sleeve 1; 62, large core diameter optical fiber; 7, sliding sleeve assembly; 71, sliding sleeve body; 72, outer side groove; 73, adapter cavity; 74, slider; 8, clamping part 2; 81, movable frame; 82, arc-shaped clamping plate 2; 83, connecting rod; 84, inclined surface; 9, small core diameter optical fiber group; 91, conduit sleeve 2; 92, small core diameter optical fiber bundle; 10, rotation driving part; 101, motor 1; 102, gear 1; 103, gear 2; 11, telescopic distance adjustment assembly; 111, bracket; 112, lead screw; 113, motor 2; 114, movable connection block; 12, hydraulic control part; 121, fixed cylinder; 122, adjusting rod; 123, piston plate; 13, positioning ring; 14, chute. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Such as Figures 1 to 12As shown in the figure, an embodiment of the present invention provides a retractable secondary coupling device and its laser fiber catheter, including a mounting base 1, a first mounting cylinder 2 and a second mounting cylinder 3 fixedly connected to both sides of the mounting base 1. A swivel sleeve assembly 4 is rotatably installed inside the first mounting cylinder 2. Clamping portions I 5 are equidistantly arranged on the inner wall of the swivel sleeve assembly 4. A rotation driving member 10 and a hydraulic control portion 12 are respectively arranged on the outer side surface of the first mounting cylinder 2. The rotation driving member 10 controls the rotation of the swivel sleeve assembly 4. The hydraulic control portion 12 fixes the laser fiber catheter sleeved in the swivel sleeve assembly 4 through the clamping portions I 5. A sliding sleeve assembly 7 is slidably sleeved inside the second mounting cylinder 3. Clamping portions II 8 are equidistantly arranged on the outer side surface of the sliding sleeve assembly 7. A telescopic distance adjustment assembly 11 is arranged on the top of the second mounting cylinder 3. The telescopic distance adjustment assembly 11 controls the lateral reciprocating movement of the sliding sleeve assembly 7. The telescopic distance adjustment assembly 11 controls the clamping portions II 8 to automatically clamp the laser fiber catheter in the sliding sleeve assembly 7. Positioning rings 13 are fixedly arranged inside both the swivel sleeve assembly 4 and the sliding sleeve assembly 7. The laser overlapping area between the laser fiber catheter inside the swivel sleeve assembly 4 and the laser fiber catheter inside the sliding sleeve assembly 7 is controlled by rotating the swivel sleeve assembly 4, and the distance between the laser fiber catheter inside the swivel sleeve assembly 4 and the laser fiber catheter inside the sliding sleeve assembly 7 is controlled and adjusted by the telescopic distance adjustment assembly 11.

[0022] Embodiment 1: During use, first, the large-core-diameter optical fiber group 6 is sleeved along one side of the first mounting cylinder 2 and sleeved inside the rotating sleeve assembly 4, and the inner end of the large-core-diameter optical fiber group 6 abuts against the positioning ring 13. After the positioning and sleeving are completed, the adjusting rod 122 in the hydraulic control part 12 is rotated, so that the piston plate 123 compresses the internal hydraulic oil in the fixed cylinder 121, so that the internal hydraulic oil is further filled into the arc-shaped cavity of the first mounting cylinder 2 and further compressed into the fixed sleeve 52 of the clamping part one 5 through the arc-shaped cavity. The internal hydraulic pressure in the fixed sleeve 52 rises, and the hydraulic pressure acts on the sleeved movable block 53, pushing the movable block 53 connected by the first spring to move, and driving the arc-shaped clamping plate one 51 to clamp and fix along the outside of the large-core-diameter optical fiber group 6. The small-core-diameter optical fiber group 9 is sleeved along the second mounting cylinder 3 into the corresponding sliding sleeve assembly 7 and sleeved into the inside of the sliding sleeve body 71, and abuts against the positioning ring 13 inside the sliding sleeve assembly 7. After the positioning and sleeving are completed, the telescopic distance-adjusting component 11 is started, and the motor two 113 controls the screw rod 112 to rotate, driving the movable connecting block 114 to move horizontally, and driving the sliding sleeve assembly 7 to slide inside the second mounting cylinder 3 and move toward the side of the mounting seat 1. As the sliding sleeve assembly 7 drives the small-core-diameter optical fiber group 9 sleeved inside with damping to move synchronously, the clamping part two 8 in the sliding sleeve assembly 7 slides along the chute 14, and the movable frame 81 is extruded and compressed through the top inclined surface 84, so that the movable frame 81 is further pressed into the outer groove 72 of the sliding sleeve body 71. At the same time, as the movable frame 81 is compressed, the arc-shaped clamping plate two 82 is driven by the connecting rod 83 to squeeze and clamp along the outside of the small-core-diameter optical fiber group 9, and the clamping part two 8 is compressed and hidden into the outer groove 72 to complete the automatic clamping of the small-core-diameter optical fiber group 9; the rotation driving part 10 is started and the large-core-diameter optical fiber group 6 is powered on. The motor one 101 rotates through the gear one 102, and the engaged gear two 103 rotates, thereby driving the rotating sleeve assembly 4 to rotate in the first mounting cylinder 2, so that the clamped and sleeved large-core-diameter optical fiber group 6 follows the rotation, so that each large-core-diameter optical fiber 62 in the large-core-diameter optical fiber group 6 gradually rotates and aligns with each small-core-diameter optical fiber bundle 92 in the small-core-diameter optical fiber group 9. When aligning, the energy output by the small-core-diameter optical fiber group 9 gradually increases and reaches the maximum value. It is determined that the large-core-diameter optical fiber group 6 and the small-core-diameter optical fiber group 9 are completely aligned at this time, and the light spots emitted by each large-core-diameter optical fiber 62 and each small-core-diameter optical fiber bundle 92 completely overlap; when the laser power required for different lesions is different, by starting the rotation driving part 10 and controlling the rotation of the rotating sleeve assembly 4, driving the internal large-core-diameter optical fiber group 6 to deflect, so that the light spots emitted by each large-core-diameter optical fiber 62 and the ends of each small-core-diameter optical fiber bundle 92 are offset and misaligned, thereby controlling the overlapping area between the light spots emitted by the large-core-diameter optical fibers 62 in the large-core-diameter optical fiber group 6 and the small-core-diameter optical fiber bundles in the small-core-diameter optical fiber group 9, and further controlling the energy received by the small-core-diameter optical fiber group. When the overlapping area is large, the output power is large; when the overlapping area is small, the output power is small, so as to control the laser power at the output end of the laser fiber catheter.

[0023] First, by dividing the laser fiber catheter into a large-core-diameter fiber group 6 and a small-core-diameter fiber group 9, and combining and installing the large-core-diameter fiber group 6 and the small-core-diameter fiber group 9 with a secondary coupling device, the large-core-diameter fiber group 6 is fixedly installed on one side of the secondary coupling device through a swivel sleeve assembly 4 and a first clamping part, and the small-core-diameter fiber group 9 is conveniently and detachably installed on the other side of the secondary coupling device through a sliding sleeve assembly 7 and a telescopic distance adjustment assembly 11. At the same time, by using the fact that the large-core-diameter fiber group 6 has a low adaptation difficulty with the excimer laser treatment device, and the small-core-diameter fiber group 9 can adapt to blood vessels of different diameters and improve its passability inside the human body, it is convenient to reach the lesion under the guidance of a guide wire, further improving the treatment effect. And after each use, only the small-core-diameter fiber group 9 needs to be discarded while the large-core-diameter fiber group 6 is retained, so that quick use can be achieved continuously for multiple times, greatly saving the anti-ultraviolet fiber material and having a good use effect.

[0024] In addition, by using the swivel sleeve assembly 4 and the first clamping part 5 in the secondary coupling device, after the socket installation of the large-core-diameter fiber group 6 is completed, the rotation control of the large-core-diameter fiber group 6 can be realized. Cooperating with the small-core-diameter fiber group 9 fixedly installed at the other end, when the laser power required for different lesions is different, by rotating the swivel sleeve assembly 4, the deflection of the large-core-diameter fiber group 6 is realized, and the overlapping area of the light spot emitted by the large-core-diameter fiber 62 in the large-core-diameter fiber group 6 and the small-core-diameter fiber bundle in the small-core-diameter fiber group 9 is controlled. By controlling the overlapping area of the light spots, the energy received by the small-core-diameter fiber group 9 is further controlled, achieving the effect of controlling the laser power at the output end of the laser fiber catheter, and large-range adjustment and control can be carried out according to actual use requirements.

[0025] Embodiment 2: When the small-core-diameter fiber group 9 is replaced and the core diameter of the small-core-diameter fiber bundle 92 in the replaced small-core-diameter fiber group 9 changes, the telescopic distance adjustment assembly 11 is started again. The second motor 113 controls the lateral movement of the movable connection block 114 through the lead screw 112, thereby controlling the lateral movement of the sliding sleeve assembly 7, and thus changing the distance between the small-core-diameter fiber group 9 and the large-core-diameter fiber group 6 in the sliding sleeve assembly 7 to adapt to the focusing coupling distance between the small-core-diameter fiber bundle 92 with different core diameters and the large-core-diameter fiber, and maintaining the coupling stability.

[0026] In this embodiment, the light-emitting end of the large-core-diameter fiber catheter adopts a grinding and polishing process, with a specific divergence angle, so that the emitted light beam emits forward in a state of being slightly divergent after focusing. The number of optical fibers and the optical fiber diameter of the small optical fiber catheters with different core diameters are different, so the required light spot area at the coupling part will be different; after the large-core-diameter fiber emits light, there are different light spot areas both inside and outside the focal point, and the light spot coupling area of the small-core-diameter fiber can be adapted by adjusting the coupling distance.

[0027] Such as Figure 11 and Figure 12As shown in the figure, in the present invention, an example of the method for focusing and aligning fiber optic groups with different diameters and different numbers on the same path is described as follows: 1. For small core diameter optical fibers with a diameter of 2.5 mm, the optical fiber has a larger diameter and a larger number of optical fibers, and a larger spot area is required, so the distance from the focus is farther; 2. For small core diameter optical fibers with a diameter of 0.9 mm, the optical fiber has a smaller diameter and a smaller number of optical fibers, and a smaller spot area is required, so the distance from the focus is closer.

[0028] First, by reusing the telescopic distance adjustment component 11 and the sliding sleeve component 7, on the one hand, when installing the small core diameter fiber optic group 9 in a sleeved manner, the telescopic distance adjustment component 11 controls the sliding sleeve component 7 to drive the internally damped sleeved small core diameter fiber optic group 9 to move, and cooperates with the second installation cylinder 3 and the second clamping part 8 to automatically complete the clamping and fixing of the sleeved small core diameter fiber optic group 9 during the transverse forward movement, and the clamping can be released when the telescopic distance adjustment component 11 moves in the reverse direction, realizing the quick disassembly of the small core diameter fiber optic group 9, facilitating timely replacement. On the other hand, after automatic clamping, the telescopic distance adjustment component 11 further controls the forward and backward movement of the sliding sleeve component 7, which can change the coupling distance between the sleeved small core diameter fiber optic group 9 and the fixed large core diameter fiber optic group 6. For the small core diameter fiber optic bundle 92 with a changed core diameter after replacement, the coupling distance is adjusted appropriately to adapt to the core diameter change, ensuring good coupling effect and coupling transmission efficiency during use.

[0029] Among them, the swivel sleeve component 4 includes a swivel sleeve body 41, an internal reserved cavity 42 and an adapter port 43. A snap ring is fixedly sleeved on the outer side surface of the swivel sleeve body 41, and an annular cavity is provided on the inner wall of the first installation cylinder 2. The snap ring is rotatably sleeved in the arc-shaped cavity. The internal reserved cavity 42 is opened inside the swivel sleeve body 41, and the adapter port 43 is opened on the inner wall of the swivel sleeve body 41, and the adapter port 43 communicates with the internal reserved cavity 42. A side port is provided on the outer side surface of the swivel sleeve body 41, and the internal reserved cavity 42 communicates with the annular cavity through the side port. The first clamping part 5 includes an arc-shaped clamping plate one 51, a fixed sleeve 52 and a movable block 53. The arc-shaped clamping plate one 51 is adapted in the adapter port 43, the fixed sleeve 52 is fixed in the internal reserved cavity 42, one end of the movable block 53 is fixedly connected with the arc-shaped clamping plate one 51, and the movable block 53 is elastically connected in the fixed sleeve 52 through a first spring, and the fixed sleeve 52 communicates with the annular cavity.

[0030] The swivel sleeve component 4 rotates in the first installation cylinder 2 to realize the rotation control of the internally sleeved and clamped large core diameter fiber optic group 6. The snap ring and the annular cavity cooperate to ensure the stable rotation of the swivel sleeve component 4. At the same time, the arc-shaped cavity is also used to guide the flow of hydraulic oil. The internal reserved cavity 42 adapts to the installation layout of the first clamping part 5. The circumferentially distributed first clamping parts 5 ensure stable clamping and fixing of the large core diameter fiber optic group 6. The first clamping part 5 is pushed by internal hydraulic pressure to provide clamping power, and the movable block 53 moves in the fixed sleeve 52 in a dynamic sealing manner.

[0031] Among them, the rotation driving member 10 includes a first motor 101, a first gear 102 and a second gear 103. The first gear 102 is fixedly sleeved on the output shaft of the first motor 101. The second gear 103 is fixedly sleeved on the outer side surface of the rotating sleeve body 41, and the second gear 103 is meshed with the first gear 102.

[0032] The rotation driving member 10 controls the rotation of the rotating sleeve assembly 4 to provide the power for rotation control.

[0033] Among them, the hydraulic control part 12 includes a fixed cylinder 121, an adjusting rod 122 and a piston plate 123. The fixed cylinder 121 is fixed on the outer side of the first mounting cylinder 2, and the fixed cylinder 121 is communicated with the annular cavity. The piston plate 123 is movably sleeved in the fixed cylinder 121. One end of the adjusting rod 122 movably passes through the fixed cylinder 121 and extends into the fixed cylinder 121. The inner end of the die-cutting adjusting rod 122 is fixedly connected with the piston plate 123. The piston plate 123 is elastically connected in the fixed cylinder 121 through a second spring. The fixed cylinder 121 is filled with lubricating oil.

[0034] The hydraulic control part 12 realizes the adjustment and control of the internal hydraulic pressure through manual selection, and realizes the clamping and fixing of the large-core-diameter optical fiber group 6 by enhancing the hydraulic pressure. Since the replacement frequency of the large-core-diameter optical fiber group 6 is low, manual control is adopted to save the control cost.

[0035] Among them, the sliding sleeve assembly 7 includes a sliding sleeve body 71, an outer side groove 72, an adaptation cavity 73 and a slider 74. The slider 74 is fixedly connected in the sliding sleeve body 71. A sliding groove 14 is formed on the outer side surface of the second mounting cylinder 3. The slider 74 is slidably sleeved in the sliding groove 14. The adaptation cavity 73 is formed on the inner wall of the sliding sleeve body 71. The outer side groove 72 is formed on the outer side surface of the sliding sleeve body 71. The outer side grooves 72 and the adaptation cavities 73 correspond to each other one by one. The outer side grooves 72 and the sliding grooves 14 correspond to each other one by one. The second clamping part 8 includes a movable frame 81, an arc-shaped clamping plate 82, a connecting rod 83 and an inclined surface 84. The movable frame 81 is elastically connected in the outer side groove 72 through a third spring. The arc-shaped clamping plate 82 is properly sleeved in the adaptation cavity 73. The connecting rod 83 is fixedly connected between the arc-shaped clamping plate 82 and the movable frame 81. The inclined surface 84 is formed on the movable frame 81 and is close to the left end of the sliding groove 14.

[0036] The sliding sleeve assembly 7 controls the lateral movement of the small-core-diameter optical fiber group 9 sleeved inside through lateral movement. And the second clamping part 8 is elastically arranged on the outer side of the sliding sleeve assembly 7. By cooperating with the telescopic distance-adjusting component 11 and the second mounting cylinder 3, while realizing the movement control of the sliding sleeve assembly 7, the second clamping part 8 is guided and extruded to realize automatic compression and clamping, and the automatic clamping operation of the small-core-diameter optical fiber group 9 is completed. For the small-core-diameter optical fiber group 9 that needs to be frequently disassembled and replaced, the clamping is completed by the second clamping part 8 under the movement and extrusion, and the clamping is released when moving in the reverse direction and pushing out. The operation is simple and the replacement is convenient.

[0037] Among them, the telescopic distance adjustment component 11 includes a bracket 111, a lead screw 112, a second motor 113, and a movable connection block 114. The lead screw 112 is rotatably arranged in the bracket 111. The second motor 113 controls the forward and reverse rotation of the lead screw 112. The movable connection block 114 is threadedly sleeved on the outer surface of the lead screw 112, and the movable connection block 114 is fixed on the slider 74 of the sliding sleeve assembly 7.

[0038] The telescopic distance adjustment component 11 realizes reciprocating lateral movement through the forward and reverse rotation of the lead screw 112 and the cooperating sliding sleeve assembly 7. On the one hand, it completes the automatic clamping action of the first clamping part 5. On the other hand, when controlling the lateral movement of the sliding sleeve assembly 7, it completes the adjustment of the coupling distance.

[0039] Among them, the laser optical fiber catheter includes a large-core-diameter optical fiber group 6, a small-core-diameter optical fiber group 9, and a retractable secondary coupling device. The large-core-diameter optical fiber group 6 is sleeved inside the rotating sleeve assembly 4. The small-core-diameter optical fiber group 9 is sleeved in the sliding sleeve assembly 7. The large-core-diameter optical fiber group 6 includes a first catheter sleeve 61 and large-core-diameter optical fibers 62 arranged in the first catheter sleeve 61. The small-core-diameter optical fiber group 9 includes a second catheter sleeve 91 and a small-core-diameter optical fiber bundle 92 arranged in the second catheter sleeve 91. There are no less than 6 large-core-diameter optical fibers 62, and they are distributed around the axis of the large-core-diameter optical fiber group 6 in a circumferential manner. There are no less than 6 small-core-diameter optical fiber bundles 92, and they are distributed around the axis of the small-core-diameter optical fiber group 9 in a circumferential manner. Each large-core-diameter optical fiber 62 is coaxial with each small-core-diameter optical fiber bundle 92.

[0040] Laser is emitted through the large-core-diameter optical fibers 62 in the large-core-diameter optical fiber group 6, and laser transmission is realized after coupling with the small-core-diameter optical fiber bundles 92 in the small-core-diameter optical fiber group 9. Each large-core-diameter optical fiber 62 is coaxial with each small-core-diameter optical fiber bundle 92, ensuring that when the large-core-diameter optical fibers 62 deflect, the overlapping spot areas of each large-core-diameter optical fiber 62 and small-core-diameter optical fiber bundle 92 are the same, realizing uniform control.

[0041] Working principle and usage process of the present invention: During use, first, the large-core-diameter optical fiber group 6 is sleeved along one side of the first mounting cylinder 2 and sleeved inside the rotating sleeve assembly 4, and the inner end of the large-core-diameter optical fiber group 6 abuts against the positioning ring 13. After the positioning and sleeving are completed, the adjusting rod 122 in the hydraulic control part 12 is rotated, so that the piston plate 123 compresses the internal hydraulic oil in the fixed cylinder 121, and the internal hydraulic oil is further filled into the arc-shaped cavity of the first mounting cylinder 2 and further compressed into the fixed sleeve 52 of the clamping part 1 5 through the arc-shaped cavity. The internal hydraulic pressure in the fixed sleeve 52 rises, and the hydraulic pressure acts on the sleeved movable block 53, pushing the movable block 53 connected by the first spring to move, and driving the arc-shaped clamping plate 1 51 to clamp and fix along the outer side of the large-core-diameter optical fiber group 6. The small-core-diameter optical fiber group 9 is sleeved along the second mounting cylinder 3 into the corresponding sliding sleeve assembly 7 and sleeved into the inside of the sliding sleeve body 71, and abuts against the positioning ring 13 inside the sliding sleeve assembly 7. After the positioning and sleeving are completed, the telescopic distance-adjusting component 11 is started, and the motor two 113 controls the screw rod 112 to rotate, driving the movable connection block 114 to move horizontally, and driving the sliding sleeve assembly 7 to slide inside the second mounting cylinder 3 and move toward the side of the mounting seat 1. As the sliding sleeve assembly 7 drives the small-core-diameter optical fiber group 9 sleeved inside with damping to move synchronously, the clamping part 2 8 in the sliding sleeve assembly 7 slides along the sliding groove 14, and the movable frame 81 is extruded and compressed through the top inclined surface 84, so that the movable frame 81 is further pressed into the outer groove 72 of the sliding sleeve body 71. At the same time, as the movable frame 81 is compressed, the arc-shaped clamping plate 2 82 is driven by the connecting rod 83 to squeeze and clamp along the outer side of the small-core-diameter optical fiber group 9, and the clamping part 2 8 is compressed and hidden into the outer groove 72 to complete the automatic clamping of the small-core-diameter optical fiber group 9; the rotation driving part 10 is started and the large-core-diameter optical fiber group 6 is energized. The motor one 101 rotates through the gear one 102, and the meshing gear two 103 rotates, thereby driving the rotating sleeve assembly 4 to rotate in the first mounting cylinder 2, so that the clamped and sleeved large-core-diameter optical fiber group 6 rotates accordingly, so that each large-core-diameter optical fiber 62 in the large-core-diameter optical fiber group 6 gradually rotates and is aligned with each small-core-diameter optical fiber bundle 92 in the small-core-diameter optical fiber group 9. When aligning, the energy output by the small-core-diameter optical fiber group 9 gradually increases and reaches the maximum value. It is determined that the large-core-diameter optical fiber group 6 and the small-core-diameter optical fiber group 9 are completely aligned at this time, and the light spots emitted by each large-core-diameter optical fiber 62 and each small-core-diameter optical fiber bundle 92 completely overlap; when the laser power required for different lesions is different, by starting the rotation driving part 10 and controlling the rotation of the rotating sleeve assembly 4, the internal large-core-diameter optical fiber group 6 is driven to deflect, so that the light spots emitted by each large-core-diameter optical fiber 62 and the ends of each small-core-diameter optical fiber bundle 92 are offset and misaligned, thereby controlling the overlapping area of the light spots emitted by the large-core-diameter optical fibers 62 in the large-core-diameter optical fiber group 6 and the small-core-diameter optical fiber bundles in the small-core-diameter optical fiber group 9, and further controlling the energy received by the small-core-diameter optical fiber group. When the overlapping area is large, the output power is large; when the overlapping area is small, the output power is small, so as to control the laser power at the output end of the laser optical fiber catheter;After replacing the small-core-diameter optical fiber group 9, when the core diameter of the small-core-diameter optical fiber bundle 92 in the replaced small-core-diameter optical fiber group 9 changes, the telescopic distance-adjusting component 11 is started again. The second motor 113 controls the transverse movement of the movable connection block 114 through the lead screw 112, thereby controlling the transverse movement of the sliding sleeve component 7, and thus changing the distance between the small-core-diameter optical fiber group 9 and the large-core-diameter optical fiber group 6 in the sliding sleeve component 7 to adapt to the focusing coupling distance between the small-core-diameter optical fiber bundle 92 with different core diameters and the large-core-diameter optical fiber, and maintaining the coupling stability.

[0042] Embodiment 3: On the basis of the above Embodiment 1 and 2, in this embodiment, a positioning groove (which can also be a positioning protrusion) is provided on the circumference of the positioning ring 13 of the swivel sleeve component 4 of the retractable secondary coupling device, and a matching positioning protrusion (which can also be a positioning groove) is coaxially provided at the corresponding position on the circumference of the end face where the large-core-diameter optical fiber group 6 contacts the positioning ring 13.

[0043] At least one positioning groove (which can also be a positioning protrusion) is provided on the circumference of the positioning ring 13 of the sliding sleeve component 7 of the retractable secondary coupling device, and a matching positioning protrusion (which can also be a positioning groove) is coaxially provided at the corresponding position on the circumference of the end face where the small-core-diameter optical fiber group 9 contacts the positioning ring 13.

[0044] When the large-core-diameter optical fiber group 6 or the small-core-diameter optical fiber group 9 is inserted into the swivel sleeve component 4 or the sliding sleeve component 7 of the retractable secondary coupling device, only need to rotate the large-core-diameter optical fiber group 6 or the small-core-diameter optical fiber group 9 until its positioning protrusion is inserted into the positioning groove to complete the adaptation, then it can ensure that the large-core-diameter optical fiber group 6 and the small-core-diameter optical fiber group 9 are coaxial inside the retractable secondary coupling device, thus ensuring the secondary coupling effect.

[0045] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A retractable secondary coupling device, comprising a mounting base (1), a first mounting cylinder (2) and a second mounting cylinder (3) fixedly connected to both sides of the mounting base (1), characterized in that: A swivel sleeve assembly (4) is rotatably installed inside the first mounting cylinder (2). Clamping parts I (5) are equidistantly arranged on the inner wall of the swivel sleeve assembly (4). A rotation driving part (10) and a hydraulic control part (12) are respectively arranged on the outer side surface of the first mounting cylinder (2). The rotation driving part (10) controls the rotation of the swivel sleeve assembly (4). The hydraulic control part (12) fixes and sleevs a laser optical fiber conduit in the swivel sleeve assembly (4) through the clamping part I (5). A sliding sleeve assembly (7) is slidably sleeved inside the second mounting cylinder (3). Clamping parts II (8) are equidistantly arranged on the outer side surface of the sliding sleeve assembly (7). A telescopic distance adjusting assembly (11) is arranged on the top of the second mounting cylinder (3). The telescopic distance adjusting assembly (11) controls the horizontal reciprocating movement of the sliding sleeve assembly (7). The telescopic distance adjusting assembly (11) controls the clamping part II (8) to automatically clamp the laser optical fiber conduit in the sliding sleeve assembly (7). Positioning rings (13) are fixedly arranged inside both the swivel sleeve assembly (4) and the sliding sleeve assembly (7). The overlapping area of the laser of the laser optical fiber conduit inside the swivel sleeve assembly (4) and the laser optical fiber conduit inside the sliding sleeve assembly (7) is controlled by rotating the swivel sleeve assembly (4), and the distance between the laser optical fiber conduit inside the swivel sleeve assembly (4) and the laser optical fiber conduit inside the sliding sleeve assembly (7) is controlled and adjusted by the telescopic distance adjusting assembly (11).

2. The retractable secondary coupling device according to claim 1, wherein: The swivel sleeve assembly (4) includes a swivel sleeve body (41), an internal reserved cavity (42) and an adapter port (43). A snap ring is fixedly sleeved on the outer side surface of the swivel sleeve body (41), and an annular cavity is arranged on the inner wall of the first mounting cylinder (2). The snap ring is rotatably sleeved in the arc-shaped cavity. The internal reserved cavity (42) is arranged inside the swivel sleeve body (41). The adapter port (43) is arranged on the inner wall of the swivel sleeve body (41), and the adapter port (43) communicates with the internal reserved cavity (42). A side port is arranged on the outer side surface of the swivel sleeve body (41), and the internal reserved cavity (42) communicates with the annular cavity through the side port.

3. The retractable secondary coupling device according to claim 2, wherein: The clamping part I (5) includes an arc-shaped clamping plate I (51), a fixed sleeve (52) and a movable block (53). The arc-shaped clamping plate I (51) is adapted in the adapter port (43). The fixed sleeve (52) is fixed in the internal reserved cavity (42). One end of the movable block (53) is fixedly connected with the arc-shaped clamping plate I (51), and the movable block (53) is elastically connected in the fixed sleeve (52) through a first spring. The fixed sleeve (52) communicates with the annular cavity.

4. The retractable secondary coupling device according to claim 3, wherein: The rotation driving part (10) includes a first motor (101), a first gear (102) and a second gear (103). The first gear (102) is fixedly sleeved on the output shaft of the first motor (101). The second gear (103) is fixedly sleeved on the outer side surface of the swivel sleeve body (41), and the second gear (103) is meshed and connected with the first gear (102).

5. The retractable secondary coupling device according to claim 4, wherein: The hydraulic control unit (12) includes a fixed cylinder (121), an adjusting rod (122), and a piston plate (123). The fixed cylinder (121) is fixed to the outer side of the first mounting cylinder (2) and is in communication with the annular cavity. The piston plate (123) is movably sleeved in the fixed cylinder (121). One end of the adjusting rod (122) movably passes through the fixed cylinder (121) and extends into the fixed cylinder (121). The inner end of the die-cutting adjusting rod (122) is fixedly connected to the piston plate (123). The piston plate (123) is elastically connected in the fixed cylinder (121) by a second spring. The fixed cylinder (121) is filled with lubricating oil.

6. The retractable secondary coupling device according to claim 5, characterized in that: The sliding sleeve assembly (7) includes a sliding sleeve body (71), an outer groove (72), an adaptation cavity (73), and a slider (74). The slider (74) is fixedly connected in the sliding sleeve body (71). A sliding groove (14) is formed on the outer side surface of the second mounting cylinder (3). The slider (74) is slidably sleeved in the sliding groove (14). The adaptation cavity (73) is formed on the inner wall of the sliding sleeve body (71). The outer groove (72) is formed on the outer side surface of the sliding sleeve body (71). The outer grooves (72) and the adaptation cavities (73) are in one-to-one correspondence. The outer grooves (72) and the sliding grooves (14) are in one-to-one correspondence.

7. The retractable secondary coupling device according to claim 6, characterized in that: The second clamping part (8) includes a movable frame (81), an arc-shaped clamping plate two (82), a connecting rod (83), and an inclined surface (84). The movable frame (81) is elastically connected in the outer groove (72) by a third spring. The arc-shaped clamping plate two (82) is suitably sleeved in the adaptation cavity (73). The connecting rod (83) is fixedly connected between the arc-shaped clamping plate two (82) and the movable frame (81). The inclined surface (84) is formed on the movable frame (81) and is close to the left end of the sliding groove (14).

8. The retractable secondary coupling device according to claim 7, characterized in that: The telescopic distance adjustment assembly (11) includes a bracket (111), a lead screw (112), a second motor (113), and a movable connection block (114). The lead screw (112) is rotatably arranged in the bracket (111). The second motor (113) controls the forward and reverse rotation of the lead screw (112). The movable connection block (114) is threadedly sleeved on the outer surface of the lead screw (112). The movable connection block (114) is fixed to the slider (74) of the sliding sleeve assembly (7).

9. A laser fiber catheter, characterized in that: The laser optical fiber catheter includes a large-core-diameter optical fiber group (6) and a small-core-diameter optical fiber group (9), as well as the retractable secondary coupling device described in claim 1; the large-core-diameter optical fiber group (6) is sleeved inside the rotating sleeve assembly (4), the small-core-diameter optical fiber group (9) is sleeved in the sliding sleeve assembly (7), the large-core-diameter optical fiber group (6) includes a catheter sleeve one (61), and large-core-diameter optical fibers (62) arranged in the catheter sleeve one (61), the small-core-diameter optical fiber group (9) includes a catheter sleeve two (91), and a small-core-diameter optical fiber bundle (92) arranged in the catheter sleeve two (91), the number of the large-core-diameter optical fibers (62) is not less than 6, and they are distributed around the axis of the large-core-diameter optical fiber group (6) in a circumferential manner, the number of the small-core-diameter optical fiber bundles (92) is not less than 6, and they are distributed around the axis of the small-core-diameter optical fiber group (9) in a circumferential manner, and each large-core-diameter optical fiber (62) is coaxial with each small-core-diameter optical fiber bundle (92).

10. A laser fiber catheter according to claim 9, characterized in that: At least one positioning groove or positioning protrusion is provided on the circumference of the positioning ring (13) of the rotating sleeve assembly (4), and the same number of adapted positioning protrusions or positioning grooves are correspondingly provided on the circumference of the end face of the large-core-diameter optical fiber group (6) in contact with the positioning ring (13); at least one positioning groove or positioning protrusion is provided on the circumference of the positioning ring (13) of the sliding sleeve assembly (7), and the same number of adapted positioning protrusions or positioning grooves are correspondingly provided on the circumference of the end face of the small-core-diameter optical fiber group (9) in contact with the positioning ring (13).

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