A plug-and-pull resistant expanded beam optical fiber coupling device

Abstract

The present invention relates to the technical field of optical fiber coupling, and more specifically, to a plug-and-pull resistant expanded beam optical fiber coupling device, comprising a sleeve, wherein a connecting assembly for connecting an optical fiber is provided inside the sleeve, the connecting assembly comprising two threaded holes formed on both sides of an inner wall of the sleeve, wherein bolts are connected to the inner threads of the threaded holes, a tapered groove is formed on the inner wall of one end of the sleeve, and two semi-cylinders are inserted into the inner wall of the tapered groove. A fixed plug drives a trapezoidal clamping block to squeeze the clamping groove, so that the two semi-cylinders are rotated to both sides, and the trapezoidal clamping block can be pulled out of the clamping groove. At this time, the fixed plug can be pulled out of the sleeve, and the optical fiber line is simultaneously driven out of the sleeve. During the process of plugging and unplugging the fixed plug, there is no severe friction with the semi-cylinders, and multiple plugging and unplugging of the fixed plug will not affect the stable fixation of the fixed plug, effectively avoiding the shaking of the optical fiber line caused by loosening of the fixed plug, so that the optical fiber line is stably docked with the lens and the transmission is stable.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber coupling, in particular to a plug-and-pull resistant expanded beam optical fiber coupling device. Background Art

[0002] A beam-expanding fiber coupling device is a device used to efficiently couple a laser beam into an optical fiber. It is commonly used in high-power laser transmission systems. The beam-expanding fiber coupling device uses a collimator to expand and collimate the light beam output from the transmitting optical fiber, and then uses a focusing lens to couple the parallel light beam into the receiving optical fiber, thereby achieving an optical path connection. Existing fiber coupling devices fix the optical fiber by plugging and unplugging.

[0003] For example, a plug-in / out resistant beam-expanding fiber coupling device and semiconductor laser disclosed in publication number CN116908975B can adjust the distance between the first lens and the light source module by rotating a threaded sleeve, thereby improving the optical coupling efficiency of the beam-expanding fiber coupling device. However, the fiber optic plug and the sleeve are connected by plugging, and each plugging / unplugging operation causes wear to the fiber optic plug. When the wear exceeds the plastic's tolerance due to excessive plugging / unplugging, the fiber optic and laser cannot be properly aligned, resulting in reduced power and accuracy of laser transmission. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides a plug-and-pull resistant expanded beam optical fiber coupling device.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a plug-and-pull resistant beam-expanding optical fiber coupling device, comprising a sleeve, a fixing plate for providing support fixedly connected to the inner wall of the sleeve, a fixing cylinder for guiding the optical fiber fixedly sleeved at the center of the fixing plate, a positioning cylinder for positioning the optical fiber clamped inside the fixing cylinder, a lens clamped inside the positioning cylinder, and a laser emitter plugged into the interior of the sleeve;

[0006] The interior of the sleeve is provided with a connection component for connecting the optical fiber, and the connection component includes two threaded holes opened on both sides of the inner wall of the sleeve, the internal threads of the threaded holes are connected to bolts, a conical groove is opened on the inner wall of one end of the sleeve, and two semi-cylinders are inserted into the inside of the conical groove, two rotating grooves are symmetrically opened on the inner wall of the semi-cylinder, and two inclined surfaces are symmetrically opened on the inner wall of one end of the semi-cylinder, a fixed plug is inserted into the interior of the semi-cylinder, and an optical fiber is embedded in the interior of the fixed plug, a trapezoidal card block is fixedly connected to the inner wall of the semi-cylinder, and two card grooves are symmetrically opened on the outer wall of the fixed 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 located inside the sleeve, and the position of the shortest end of the inner diameter 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 rotation groove, and the fixed plug matches the semi-cylinder.

[0009] Specifically, one end of the optical fiber inserted into the semi-cylinder is plugged into the interior of the positioning cylinder, the optical fiber fits the lens, and the inner wall of the positioning cylinder on the side close to the optical fiber is tapered.

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

[0011] Specifically, a reinforcement component for reinforcing the connection component is provided on the surface of the fixed plug, and the reinforcement component includes a ring, which is movably sleeved on the surface of the fixed plug, and a rubber cone ring is fixedly connected to one side of the ring, and a ring groove is provided on the outer wall of the ring, and a clamping ring is clamped inside the ring groove, and a rubber strip is fixedly connected to the outer wall of the clamping ring.

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

[0013] Beneficial effects of the present invention:

[0014] (1) The present invention discloses a beam-expanding optical fiber coupling device that is resistant to plugging and unplugging. The fixed plug drives the trapezoidal block to squeeze the card slot, causing the two semi-cylinders to rotate to both sides, and the trapezoidal block can be pulled out of the card slot. At this time, the fixed plug can be pulled out of the sleeve, and the optical fiber can be moved out of the sleeve at the same time. During the process of plugging and unplugging the fixed plug, there is no severe friction with the semi-cylinder. Multiple plugging and unplugging of the fixed plug will not affect the stable fixation of the fixed plug, effectively avoiding the shaking of the optical fiber caused by the loosening of the fixed plug, so that the optical fiber and the lens can be stably connected and the transmission is stable.

[0015] (2) The present invention describes a plug-in / plug-resistant expanded beam optical fiber coupling device, which blocks the gap between the inner wall of the cone groove and the outer wall of the semi-cylinder by a rubber cone ring, making the semi-cylinder unable to rotate, so that the fixed plug can be stably fixed. When the fixed plug needs to be plugged in or unplugged, the rubber strip is pulled to drive the clamping ring to move, the clamping ring drives the sleeve ring to move, and the sleeve ring drives the rubber cone ring to move out of the cone groove, which can release the fixation of the semi-cylinder and allow the semi-cylinder to rotate to loosen the fixation of the fixed plug. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 1 A schematic cross-sectional view of a plug-resistant expanded beam optical fiber coupling device provided by the present invention Figure 1 ;

[0018] Figure 2 A schematic diagram of the appearance and structure of a plug-resistant expanded beam optical fiber coupling device provided by the present invention;

[0019] Figure 3 A schematic cross-sectional view of a plug-resistant expanded beam optical fiber coupling device provided by the present invention Figure 2 ;

[0020] Figure 4 A schematic diagram of a semi-cylindrical structure of a plug-resistant expanded beam optical fiber coupling device provided by the present invention;

[0021] Figure 5 A schematic diagram of the sleeve structure of a plug-and-pull resistant expanded beam optical fiber coupling device provided by the present invention;

[0022] Figure 6 A schematic diagram of the structure of a reinforcement component of a plug-and-pull resistant expanded beam optical fiber coupling device provided by the present invention;

[0023] Figure 7 This is a schematic diagram of the fixed plug structure of a plug-resistant expanded-beam optical fiber coupling device provided by the present invention.

[0024] In the figure: 1. Sleeve; 2. Fixing plate; 3. Fixing cylinder; 4. Positioning cylinder; 5. Laser emitter; 6. Lens; 7. Connecting assembly; 71. Threaded hole; 72. Bolt; 73. Conical groove; 74. Semi-cylinder; 75. Rotating groove; 76. Inclined surface; 77. Fixed plug; 78. Optical fiber line; 79. Trapezoidal block; 710. Card groove; 8. Reinforcement assembly; 81. Ring; 82. Rubber cone ring; 83. Ring groove; 84. Snap ring; 85. Rubber strip. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

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

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

[0028] When in use, first put the positioning tube 4 on the laser head of the laser emitter 5, then insert the lens 6 into the positioning tube 4 so that the lens 6 corresponds to the laser emitter 5, then insert the laser emitter 5 with the positioning tube 4 into the sleeve 1, so that the positioning tube 4 is inserted into the fixed tube 3, and then insert the optical fiber from the other end of the sleeve 1 so that the optical fiber contacts and corresponds to the lens 6. At this time, the laser emitter 5 emits laser, and the laser is aggregated by the lens 6 and input into the optical fiber.

[0029] Embodiment 2: The technical solution that distinguishes this embodiment from that of Embodiment 1 includes: a connecting component 7 for connecting the optical fiber is provided inside the sleeve 1, the connecting component 7 includes two threaded holes 71 opened on both sides of the inner wall of the sleeve 1, the internal threads of the threaded holes 71 are connected to bolts 72, a conical groove 73 is opened on the inner wall of one end of the sleeve 1, two semi-cylinders 74 are inserted into the inside of the conical groove 73, two rotating grooves 75 are symmetrically opened on the inner wall of the semi-cylinder 74, two inclined surfaces 76 are symmetrically opened on the inner wall of one end of the semi-cylinder 74, a fixed plug 77 is inserted into the interior of the semi-cylinder 74, an optical fiber line 78 is embedded in the fixed plug 77, a trapezoidal block 79 is fixedly connected to the inner wall of the semi-cylinder 74, and two card grooves 710 are symmetrically opened on the outer wall of the fixed plug 77.

[0030] A bolt 72 is clamped in two rotating grooves 75 on the same side of the two semi-cylinders 74. The inclined surface 76 is provided 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, so that the two semi-cylinders 74 are clamped on the surface of the two bolts 72 through the rotating groove 75, so that the two semi-cylinders 74 can rotate around the bolts 72, so that the two semi-cylinders 74 can rotate to open and close.

[0031] 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 so that the fixed plug 77 can be stably inserted into the two semi-cylinders 74 .

[0032] One end of the optical fiber 78 is inserted into the semi-cylinder 74 and plugged into the interior of the positioning tube 4. The optical fiber 78 fits the lens 6. The inner wall of the positioning tube 4 close to the optical fiber 78 is tapered, and the optical fiber 78 is guided to correspond to the lens 6 through the positioning tube 4.

[0033] The trapezoidal block 79 is engaged in the slot 710 . The slot 710 is longer than the trapezoidal block 79 , making it easier for the trapezoidal block 79 to be disengaged from the slot 710 .

[0034] When in use, first insert the two semi-cylinders 74 into the tapered groove 73, then thread the bolt 72 into the threaded hole 71, insert the bolt 72 into the corresponding rotating groove 75, fix the semi-cylinder 74 in the tapered groove 73 by the bolt 72, then fix the optical fiber line 78 inside the fixing plug 77, then insert the fixing plug 77 into the two semi-cylinders 74, drive the optical fiber line 78 to be inserted into the positioning cylinder 4 through the fixing plug 77, so that the optical fiber line 78 contacts the lens 6, at this time, the fixing plug 77 pushes the two semi-cylinders 74 to rotate and splice around the bolt 72, and the semi-cylinder 74 drives the trapezoidal block 79 to be stuck in the card groove 710, and then fix the fixing plug 77 in the semi-cylinder 74. When it is necessary to pull out the optical fiber line 78 When the fixing plug 77 is pulled out, it is only necessary to pull the optical fiber line 78 to drive the fixed plug 77 to move. When the fixing plug 77 moves, it drives the trapezoidal block 79 to squeeze the card slot 710, so that the two semi-cylinders 74 rotate to both sides, and the trapezoidal block 79 can be pulled out from the card slot 710. At this time, the fixing plug 77 can be pulled out of the sleeve 1, and the optical fiber line 78 can be moved out of the sleeve 1 at the same time. There is no severe friction between the fixing plug 77 and the semi-cylinder 74 during the plugging and unplugging process, so the wear of the fixing plug 77 is low each time it is plugged in and out. Multiple plugging and unplugging of the fixing plug 77 will not affect the stable fixation of the fixing plug 77, effectively avoiding the shaking of the optical fiber line 78 caused by the loosening of the fixing plug 77, so that the optical fiber line 78 and the lens 6 are stably docked and the transmission is stable.

[0035] Embodiment 3: The technical solution that distinguishes this embodiment 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, and the reinforcement component 8 includes a ring 81, which 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 ring 81, and an annular groove 83 is provided on the outer wall of the ring 81, and a snap ring 84 is clamped inside the annular groove 83, and a rubber strip 85 is fixedly connected to the outer wall of the snap ring 84.

[0036] The outer wall of the rubber cone ring 82 is clamped into the inside of the cone groove 73, and the inner wall of the rubber cone ring 82 is clamped onto the outer wall of the semi-cylinder 74. The rubber cone ring 82 blocks the gap between the inner wall of the cone groove 73 and the outer wall of the semi-cylinder 74, so that the semi-cylinder 74 can be stably fixed.

[0037] When in use, first push the ring 81, and the ring 81 drives the rubber cone ring 82 to move, so that the rubber cone ring 82 is stuck between the inner wall of the cone groove 73 and the outer wall of the semi-cylinder 74, and the rubber cone ring 82 blocks the gap between the inner wall of the cone groove 73 and the outer wall of the semi-cylinder 74, so that the semi-cylinder 74 cannot rotate, so that the fixed plug 77 can be stably fixed. When it is necessary to plug or unplug the fixed plug 77, pull the rubber strip 85 to drive the clamping ring 84 to move, and the clamping ring 84 drives the ring 81 to move, and the ring 81 drives the rubber cone ring 82 to move out of the cone groove 73, which can release the fixation of the semi-cylinder 74, so that the semi-cylinder 74 can be rotated to loosen the fixation of the fixed plug 77.

[0038] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plug-and-pull resistant beam-expanding optical fiber coupling device, comprising a sleeve (1), a fixing plate (2) for providing a supporting force fixedly connected to the inner wall of the sleeve (1), a fixing cylinder (3) for guiding an optical fiber fixedly sleeved at the center of the fixing plate (2), a positioning cylinder (4) for positioning the optical fiber clamped inside the fixing cylinder (3), a lens (6) clamped inside the positioning cylinder (4), and a laser emitter (5) plugged into the interior of the sleeve (1); Its characteristics are: The sleeve (1) is provided with a connecting assembly (7) for connecting an optical fiber. The connecting assembly (7) includes two threaded holes (71) provided on both sides of the inner wall of the sleeve (1). The inner threads of the threaded holes (71) are connected with bolts (72). A conical groove (73) is provided on the inner wall of one end of the sleeve (1). Two semi-cylinders (74) are inserted into the inner wall of the conical groove (73). Two rotating grooves (75) are symmetrically provided on the inner wall of the semi-cylinder (74). 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 into the inner wall of the semi-cylinder (74). An optical fiber (78) is embedded in the inner wall of the fixed plug (77). A trapezoidal card block (79) is fixedly connected to the inner wall of the semi-cylinder (74). Two card slots (710) are symmetrically provided on the outer wall of the fixed plug (77). A reinforcing assembly (8) for reinforcing the connecting assembly (7) is provided on the surface of the fixed plug (77), the reinforcing assembly (8) comprising a sleeve (81), the sleeve (81) being movably sleeved on the surface of the fixed plug (77), a rubber cone ring (82) being fixedly connected to one side of the sleeve (81), an annular groove (83) being provided on the outer wall of the sleeve (81), a snap ring (84) being clamped inside the annular groove (83), and a rubber strip (85) being fixedly connected to the outer wall of the snap ring (84).

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 provided 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-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-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) is in contact with the lens (6), and the inner wall of the positioning cylinder (4) close to the optical fiber line (78) is tapered.

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: 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).

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