Plugging-resistant beam expanding type optical fiber coupling device

Abstract

The invention relates to the technical field of optical fiber coupling, in particular to a plugging-resistant beam expanding type optical fiber coupling device which comprises a sleeve, a connecting assembly connected with an optical fiber is arranged in the sleeve, the connecting assembly comprises two threaded holes formed in the two sides of the inner wall of the sleeve, and bolts are in threaded connection with the interiors of the threaded holes. A conical groove is formed in the inner wall of one end of the sleeve, two semicircular cylinders are inserted into the conical groove, the trapezoidal clamping block is driven by the fixing plug to extrude the clamping groove, the two semicircular cylinders are made to rotate towards the two sides, the trapezoidal clamping block can be pulled out of the clamping groove, at the moment, the fixing plug can be pulled out of the sleeve, and meanwhile the optical fiber cable is driven to move out of the sleeve. The fixing plug does not have violent friction with the semicircular cylinder in the plugging process, stable fixation of the fixing plug is not affected by multiple plugging of the fixing plug, shaking of the optical fiber caused by loosening of the fixing plug is effectively avoided, and the optical fiber and the lens are in stable butt joint and transmission.

Description

Technical Field

[0001] The present invention relates to the technical field of fiber optic coupling, and specifically to an anti-pull-out and beam-expanding fiber optic coupling device. Background Art

[0002] A beam-expanding fiber optic coupling device is a device used to efficiently couple a laser beam into an optical fiber, and is commonly used in high-power laser transmission systems. The beam-expanding fiber optic coupling device expands and collimates the beam output from the transmitting optical fiber through a collimating mirror, and then couples the parallel beam into the receiving optical fiber through a focusing mirror, thereby realizing the optical path connection. The existing fiber optic coupling device fixes the optical fiber by plugging and unplugging.

[0003] For example, an anti-pull-out beam-expanding fiber optic coupling device and a semiconductor laser with a publication number of CN116908975B can adjust the distance between the first lens and the light source module by rotating a threaded sleeve, improving the optical coupling efficiency of the beam-expanding fiber optic coupling device. However, the fiber optic plug and the sleeve are connected by plugging, and each plugging and unplugging will cause wear to the fiber optic plug. When the wear exceeds the plastic tolerance due to excessive plugging and unplugging times, the optical fiber and the laser cannot be correctly aligned, resulting in a decrease in the power and accuracy of laser transmission. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides an anti-pull-out beam-expanding fiber optic coupling device.

[0005] The technical solution adopted by the present invention to solve its technical problems is: an anti-pull-out beam-expanding fiber optic coupling device, including a sleeve, on the inner wall of which a fixing plate for providing a supporting force is fixedly connected. At the center of the fixing plate, a fixing cylinder for guiding the optical fiber is fixedly sleeved. Inside the fixing cylinder, a positioning cylinder for positioning the optical fiber is clamped. Inside the positioning cylinder, a lens is clamped. A laser emitter is inserted into the sleeve.

[0006] A connecting component for connecting the optical fiber is arranged inside the sleeve. The connecting component includes two threaded holes opened on both sides of the inner wall of the sleeve. Bolts are threadedly connected inside the threaded holes. A tapered groove is opened on the inner wall at one end of the sleeve. Two semi-cylindrical tubes are inserted into the tapered groove. Two rotating grooves are symmetrically opened on the inner wall of the semi-cylindrical tube. Two inclined surfaces are symmetrically opened on the inner wall at one end of the semi-cylindrical tube. A fixing plug is inserted into the semi-cylindrical tube. An optical fiber line is embedded inside the fixing plug. A trapezoidal clamping block is fixedly connected to the inner wall of the semi-cylindrical tube. Two clamping grooves are symmetrically opened on the outer wall of the fixing plug.

[0007] Specifically, one of the bolts is clamped in two rotating grooves on the same side of the two semi-cylinders. The inclined surface is arranged at one end of the semi-cylinder inside the sleeve, and the position of the shortest inner diameter end of the tapered groove corresponds to the position of the threaded hole.

[0008] Specifically, one end of the fixed plug inserted into the semi-cylinder corresponds to the rotating groove, and the fixed plug matches the semi-cylinder.

[0009] Specifically, one end of the optical fiber cable inserted into the semi-cylinder is inserted inside the positioning cylinder. The optical fiber cable is attached to the lens, and the inner wall of the positioning cylinder close to the optical fiber cable is tapered.

[0010] Specifically, the trapezoidal block is clamped inside the card slot, and the length of the card slot is longer than the length of the trapezoidal block.

[0011] Specifically, a reinforcement component for reinforcing the connection component is arranged on the surface of the fixed plug. The reinforcement component includes a collar. The collar is movably sleeved on the surface of the fixed plug. One side of the collar is fixedly connected with a rubber tapered ring. A ring groove is formed on the outer wall of the collar, and a snap ring is clamped inside the ring groove. A rubber strip is fixedly connected to the outer wall of the snap ring.

[0012] Specifically, the outer wall of the rubber tapered ring is clamped inside the tapered groove, and the inner wall of the rubber tapered ring is clamped on the outer wall of the semi-cylinder.

[0013] Advantages of the present invention:

[0014] (1) For a beam-expanding optical fiber coupling device with anti-pull and anti-plug performance according to the present invention, by driving the trapezoidal block with the fixed plug to squeeze the card slot, the two semi-cylinders rotate to both sides, and the trapezoidal block can be pulled out from the card slot. At this time, the fixed plug can be pulled out of the sleeve, and at the same time, the optical fiber cable is driven to move out of the sleeve. During the insertion and extraction of the fixed plug, there is no severe friction with the semi-cylinder. Multiple insertions and extractions of the fixed plug will not affect the stable fixation of the fixed plug, effectively avoiding the shaking of the optical fiber cable caused by the loosening of the fixed plug, and enabling the stable butt-joint transmission between the optical fiber cable and the lens.

[0015] (2) For a beam-expanding optical fiber coupling device with anti-pull and anti-plug performance according to the present invention, the gap between the inner wall of the tapered groove and the outer wall of the semi-cylinder is blocked by the rubber tapered ring, so that the semi-cylinder cannot rotate, and thus the fixed plug can be stably fixed. When it is necessary to insert and extract the fixed plug, pulling the rubber strip drives the snap ring to move, the snap ring drives the collar to move, and the collar drives the rubber tapered ring to move out of the tapered groove, which can release the fixation of the semi-cylinder and enable the semi-cylinder to rotate and loosen the fixation of the fixed plug. Description of the Drawings

[0016] The present invention will be further described below with reference to the drawings and embodiments.

[0017] Figure 1 Schematic cross-sectional structure of a plug-resistant beam-expanding fiber optic coupling device provided by the present invention Figure 1 ;

[0018] Figure 2 Schematic external structure diagram of a plug-resistant beam-expanding fiber optic coupling device provided by the present invention;

[0019] Figure 3 Schematic cross-sectional structure of a plug-resistant beam-expanding fiber optic coupling device provided by the present invention Figure 2 ;

[0020] Figure 4 Schematic semi-cylindrical structure diagram of a plug-resistant beam-expanding fiber optic coupling device provided by the present invention;

[0021] Figure 5 Schematic sleeve structure diagram of a plug-resistant beam-expanding fiber optic coupling device provided by the present invention;

[0022] Figure 6 Schematic structure diagram of a reinforcement component of a plug-resistant beam-expanding fiber optic coupling device provided by the present invention;

[0023] Figure 7 Schematic structure diagram of a fixed plug of a plug-resistant beam-expanding fiber optic coupling device provided by the present invention.

[0024] In the figure: 1. Sleeve; 2. Fixed plate; 3. Fixed cylinder; 4. Positioning cylinder; 5. Laser emitter; 6. Lens; 7. Connection component; 71. Threaded hole; 72. Bolt; 73. Tapered groove; 74. Semi-cylinder; 75. Rotating groove; 76. Inclined surface; 77. Fixed plug; 78. Fiber optic cable; 79. Trapezoidal block; 710. Card slot; 8. Reinforcement component; 81. Collar; 82. Rubber tapered ring; 83. Ring groove; 84. Snap ring; 85. Rubber strip. Specific embodiments

[0025] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0026] Please refer to Figures 1 to 7 , the present invention provides the following technical solutions:

[0027] Embodiment 1: A plug-resistant beam-expanding fiber optic coupling device, including a sleeve 1, a fixed plate 2 for providing support force is fixedly connected to the inner wall of the sleeve 1, a fixed cylinder 3 for guiding the optical fiber is fixedly sleeved at the center of the fixed plate 2, a positioning cylinder 4 for positioning the optical fiber is clamped inside the fixed cylinder 3, a lens 6 is clamped inside the positioning cylinder 4, and a laser emitter 5 is inserted into the sleeve 1.

[0028] In use, first, the positioning cylinder 4 is sleeved on the laser head of the laser emitter 5, then the lens 6 is snapped into the inside of the positioning cylinder 4 to make the lens 6 correspond to the laser emitter 5. Then, the laser emitter 5 with the positioning cylinder 4 is inserted into the sleeve 1, so that the positioning cylinder 4 is snapped into the inside of the fixed cylinder 3. Then, an optical fiber is inserted from the other end of the sleeve 1 to make the optical fiber contact and correspond to the lens 6. At this time, the laser emitter 5 emits laser light, and the laser light is aggregated by the lens 6 and input into the optical fiber.

[0029] Embodiment 2: The technical solution of this embodiment different from that of Embodiment 1 includes: A connection component 7 for connecting the optical fiber is arranged inside the sleeve 1. The connection component 7 includes two threaded holes 71 opened on both sides of the inner wall of the sleeve 1. A bolt 72 is threadedly connected inside the threaded hole 71. A tapered groove 73 is opened on the inner wall at one end of the sleeve 1. Two semi-cylindrical barrels 74 are inserted into the tapered groove 73. Two rotating grooves 75 are symmetrically opened on the inner wall of the semi-cylindrical barrel 74. Two inclined surfaces 76 are symmetrically opened on the inner wall at one end of the semi-cylindrical barrel 74. A fixed plug 77 is inserted into the semi-cylindrical barrel 74. An optical fiber line 78 is embedded inside the fixed plug 77. A trapezoidal clamping block 79 is fixedly connected to the inner wall of the semi-cylindrical barrel 74. Two clamping grooves 710 are symmetrically opened on the outer wall of the fixed plug 77.

[0030] A bolt 72 is clamped in the two rotating grooves 75 on the same side of the two semi-cylindrical barrels 74. The inclined surface 76 is arranged at the end of the semi-cylindrical barrel 74 located inside the sleeve 1. The position of the shortest inner diameter end of the tapered groove 73 corresponds to the position of the threaded hole 71, so that the two semi-cylindrical barrels 74 are clamped on the surface of the two bolts 72 through the rotating grooves 75, so that the two semi-cylindrical barrels 74 can rotate around the bolt 72, and the two semi-cylindrical barrels 74 can rotate and open and close.

[0031] One end of the fixed plug 77 inserted into the semi-cylindrical barrel 74 corresponds to the rotating groove 75. The fixed plug 77 matches the semi-cylindrical barrel 74, so that the fixed plug 77 can be stably inserted into the two semi-cylindrical barrels 74.

[0032] One end of the optical fiber line 78 inserted into the semi-cylindrical barrel 74 is inserted into the positioning cylinder 4. The optical fiber line 78 is attached to the lens 6. The inner wall of the positioning cylinder 4 on the side close to the optical fiber line 78 is tapered, and the optical fiber line 78 is guided by the positioning cylinder 4 to correspond to the lens 6.

[0033] The trapezoidal clamping block 79 is clamped inside the clamping groove 710. The length of the clamping groove 710 is longer than the length of the trapezoidal clamping block 79, which facilitates the trapezoidal clamping block 79 to disengage from the clamping groove 710.

[0034] During use, first snap the two semi-cylindrical barrels 74 into the conical groove 73, then thread the bolt 72 into the threaded hole 71 so that the bolt 72 is inserted into the corresponding rotating groove 75. Fix the semi-cylindrical barrel 74 in the conical groove 73 through the bolt 72. Then fix the optical fiber line 78 inside the fixed plug 77, and then insert the fixed plug 77 into the two semi-cylindrical barrels 74. Drive the optical fiber line 78 to insert into the positioning cylinder 4 through the fixed plug 77, so that the optical fiber line 78 contacts the lens 6. At this time, the fixed plug 77 pushes the two semi-cylindrical barrels 74 to rotate and fit together around the bolt 72. The semi-cylindrical barrel 74 drives the trapezoidal block 79 to snap into the card slot 710, thereby fixing the fixed plug 77 in the semi-cylindrical barrel 74. When it is necessary to pull out the optical fiber line 78, just pull the optical fiber line 78 to drive the fixed plug 77 to move. When the fixed plug 77 moves, it drives the trapezoidal block 79 to squeeze the card slot 710, causing the two semi-cylindrical barrels 74 to rotate to both sides, and the trapezoidal block 79 can be pulled out of the card slot 710. At this time, the fixed plug 77 can be pulled out of the sleeve 1, and at the same time, the optical fiber line 78 is driven to move out of the sleeve 1. During the insertion and extraction of the fixed plug 77, there is no violent friction with the semi-cylindrical barrel 74, so the wear of the fixed plug 77 during each insertion and extraction is low. Inserting and extracting the fixed plug 77 multiple times will not affect the stable fixation of the fixed plug 77, effectively avoiding the shaking of the optical fiber line 78 caused by the loosening of the fixed plug 77, and enabling the optical fiber line 78 to be stably docked with the lens 6 for stable transmission.

[0035] Embodiment 3: The technical solution of this embodiment different from that of Embodiment 2 includes: a reinforcement component 8 for reinforcing the connection component 7 is provided on the surface of the fixed plug 77. The reinforcement component 8 includes a collar 81 which is movably sleeved on the surface of the fixed plug 77. One side of the collar 81 is fixedly connected with a rubber conical ring 82. A ring groove 83 is formed on the outer wall of the collar 81, and a snap ring 84 is clamped inside the ring groove 83. A rubber strip 85 is fixedly connected to the outer wall of the snap ring 84.

[0036] The outer wall of the rubber conical ring 82 is clamped inside the conical groove 73, and the inner wall of the rubber conical ring 82 is clamped on the outer wall of the semi-cylindrical barrel 74. By blocking the gap between the inner wall of the conical groove 73 and the outer wall of the semi-cylindrical barrel 74 with the rubber conical ring 82, the semi-cylindrical barrel 74 can be stably fixed.

[0037] During use, first push the collar 81, drive the rubber conical ring 82 to move through the collar 81, so that the rubber conical ring 82 is snapped into the gap between the inner wall of the conical groove 73 and the outer wall of the semi-cylindrical barrel 74. Block the gap between the inner wall of the conical groove 73 and the outer wall of the semi-cylindrical barrel 74 with the rubber conical ring 82, so that the semi-cylindrical barrel 74 cannot rotate, and thus the fixed plug 77 can be stably fixed. When it is necessary to insert and extract the fixed plug 77, pull the rubber strip 85 to drive the snap ring 84 to move, the snap ring 84 drives the collar 81 to move, and the collar 81 drives the rubber conical ring 82 to move out of the conical groove 73, which can release the fixation of the semi-cylindrical barrel 74, so that the semi-cylindrical barrel 74 can rotate to release the fixation of the fixed plug 77.

[0038] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and the descriptions in the specification are only used to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A plug-in resistant beam expansion type optical fiber coupling device, comprising a sleeve (1), a fixing plate (2) for providing a supporting force is fixedly connected to the inner wall of the sleeve (1), a fixing cylinder (3) for guiding an optical fiber is fixedly sleeved at the center of the fixing plate (2), a positioning cylinder (4) for positioning the optical fiber is clamped inside the fixing cylinder (3), a lens (6) is clamped inside the positioning cylinder (4), and a laser emitter (5) is plugged inside the sleeve (1); Features: A connection assembly (7) for connecting an optical fiber is arranged inside the sleeve (1), and the connection assembly (7) comprises two threaded holes (71) provided on both sides of the inner wall of the sleeve (1), and the inner threads of the threaded holes (71) are connected to bolts (72). A conical groove (73) is provided on the inner wall of one end of the sleeve (1), and two semi-cylinders (74) are inserted inside the conical groove (73). Two rotation grooves (75) are symmetrically provided on the inner wall of the semi-cylinder (74), and two inclined surfaces (76) are symmetrically provided on the inner wall of one end of the semi-cylinder (74). A fixed plug (77) is inserted inside the semi-cylinder (74), and an optical fiber line (78) is embedded inside the fixed plug (77). A trapezoidal clamping block (79) is fixedly connected to the inner wall of the semi-cylinder (74), and two clamping grooves (710) are symmetrically provided on the outer wall of the fixed plug (77).

2. The plug-resistant expanded beam optical fiber coupling device according to claim 1, characterized in that: One of the bolts (72) is clamped in two rotating grooves (75) on the same side of the two semi-cylinders. The inclined surface (76) is arranged at one end of the semi-cylinder (74) located inside the sleeve (1). The position of the shortest end of the inner diameter of the tapered groove (73) corresponds to the position of the threaded hole (71).

3. The plug-in-resistant expanded beam optical fiber coupling device according to claim 1, characterized in that: One end of the fixed plug (77) inserted into the semi-cylinder (74) corresponds to the rotation groove (75), and the fixed plug (77) matches the semi-cylinder (74).

4. The plug-in-resistant expanded beam optical fiber coupling device according to claim 1, characterized in that: One end of the optical fiber line (78) inserted into the semi-cylinder (74) is plugged into the interior of the positioning cylinder (4), the optical fiber line (78) fits the lens (6), and the inner wall of the positioning cylinder (4) close to the optical fiber line (78) is conical.

5. The plug-resistant expanded beam optical fiber coupling device according to claim 1, characterized in that: The trapezoidal clamping block (79) is clamped inside the clamping slot (710), and the length of the clamping slot (710) is longer than the length of the trapezoidal clamping block (79).

6. The plug-resistant expanded beam optical fiber coupling device according to claim 1, characterized in that: A reinforcing component (8) for reinforcing the connecting component (7) is arranged on the surface of the fixed plug (77), and the reinforcing component (8) comprises a sleeve ring (81), and the sleeve ring (81) is movably sleeved on the surface of the fixed plug (77), and a rubber cone ring (82) is fixedly connected to one side of the sleeve ring (81), and an annular groove (83) is provided on the outer wall of the sleeve ring (81), and a snap ring (84) is snapped inside the annular groove (83), and a rubber strip (85) is fixedly connected to the outer wall of the snap ring (84).

7. The plug-in-resistant expanded-beam optical fiber coupling device according to claim 6, characterized in that: The outer wall of the rubber cone ring (82) is clamped in the interior of the cone groove (73), and the inner wall of the rubber cone ring (82) is clamped on the outer wall of the semi-cylinder (74).

Images