An optical fiber connector

Abstract

The application relates to the technical field of connectors, and particularly discloses an optical fiber connector which comprises an outer sheath, a main body, a tail sheath and a matching liquid device, the tail sheath is connected to one end of the main body, the outer sheath is sleeved on the main body, and the matching liquid device is arranged in the main body; the main body comprises a plug-in core, a pre-buried optical fiber and a connecting block, a through core hole is formed in the connecting block, one end of the plug-in core is fixedly arranged on the connecting block, one end of the pre-buried optical fiber is arranged in the plug-in core, the other end of the pre-buried optical fiber is fixedly arranged in the through core hole, and the matching liquid device is communicated with the through core hole. The matching liquid device is used for sealing and storing the matching liquid before the optical fiber is connected, and the matching liquid is injected into the through core hole when the optical fiber is connected to the optical fiber connector, so that the matching liquid in the optical fiber connector is prevented from being in contact with air for a long time during storage and being deteriorated, meanwhile, the matching liquid is prevented from leaking and losing, and the insertion loss of the optical fiber is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of connectors, in particular to an optical fiber connector. BACKGROUND

[0002] The optical fiber connector is a device for detachable (movable) connection between optical fibers, which precisely butts two end faces of the optical fibers to maximize the coupling of the light output by the transmitting optical fiber into the receiving optical fiber, and minimizes the impact on the system due to its intervention in the optical link, which is the basic requirement of the optical fiber connector. To some extent, the optical fiber connector affects the reliability and performance of the optical transmission system. The key factor of the high insertion loss of the optical fiber connector is the low refractive index caused by the air gap at the splicing point, so the insertion loss can be effectively reduced by adding the optical fiber matching liquid at the splicing point. The optical fiber matching liquid is a soft, non-sticky, water-resistant, non-toxic and harmless, and crystal clear paste compound. The use of the optical fiber matching liquid can reduce the Fresnel reflection caused by the low refractive index air gap between the end faces of the optical fibers.

[0003] In the prior art, the matching liquid is manually dipped on the core end face of the optical fiber, and then the optical fiber is inserted into the optical fiber connector, which has the problems of slow speed, uneven liquid amount, etc. The current method of pre-adding optical fiber matching liquid in the optical fiber connector has the problems that the pre-added matching liquid is contaminated and deteriorated due to long-term contact with air, the refractive index changes, and the insertion loss increases. Meanwhile, the internal matching liquid of the connector also has the problem of leakage and loss, which causes the matching liquid to be unable to fill the splicing point, resulting in an increase in insertion loss. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art and provide an optical fiber connector.

[0005] The purpose of the present application is achieved by the following technical solution: an optical fiber connector, comprising an outer sheath, a main body, a tail sheath and a matching liquid device, the tail sheath is connected to one end of the main body, the outer sheath is sleeved on the main body, and the matching liquid device is arranged in the main body.

[0006] The main body comprises a plug-in core, a pre-buried optical fiber and a connecting block, the connecting block is provided with a core penetrating hole penetrating through the connecting block, one end of the plug-in core is fixedly arranged on the connecting block, one end of the pre-buried optical fiber is arranged in the plug-in core, and the other end of the pre-buried optical fiber is fixedly arranged in the core penetrating hole.

[0007] The matching liquid device comprises a sliding frame, a liquid blocking plate, a liquid injection plug, a piston rod, a pushing block and a pushing plate, a frame sliding groove corresponding to the sliding frame is formed on the connecting block, the sliding frame is partially and slidably arranged in the frame sliding groove, a liquid injection cavity is formed in the connecting block, the liquid injection plug is slidably arranged in the liquid injection cavity, a missing groove communicating with the frame sliding groove is formed on one side of the liquid injection cavity, one end of the piston rod is fixedly connected with the liquid injection plug, the other end of the piston rod extends out of the liquid injection cavity and into the missing groove, a plate sliding groove is formed between the liquid injection cavity and the through hole, one end of the plate sliding groove communicates with the missing groove, the liquid blocking plate is partially and slidably arranged in the plate sliding groove, a liquid injection hole penetrating through the plate sliding groove and communicating with the through hole is formed on one side of the liquid injection cavity, the pushing block is fixedly arranged on the sliding frame, a plug rod hole is formed on the pushing block, the plug rod hole is slidably connected with the piston rod, a plurality of elastic triangular plates are arranged on the piston rod, the inclined surface of the elastic triangular plate faces the liquid injection plug, the height of the elastic triangular plate is greater than the gap between the piston rod and the plug rod hole, a slot is formed on one side of the liquid blocking plate along the axial direction of the piston rod, and the pushing plate is fixedly arranged on the pushing block and slidably arranged in the slot.

[0008] When the optical fiber connector is not used, the slide frame is located at one end of the frame sliding groove close to the ferrule, the liquid blocking plate is located at the deepest part of the plate sliding groove, the liquid injection hole is completely blocked, the matching liquid is filled in the liquid injection cavity, the liquid injection plug is located at one end of the liquid injection cavity at this time, the space between the end surface of the liquid injection plug and the liquid injection cavity is in the maximum state, the liquid blocking plate and the liquid injection plug jointly seal the matching liquid in the liquid injection cavity, which avoids the matching liquid from being polluted and deteriorated due to contact with air, and also avoids the leakage of the matching liquid, thereby ensuring that the amount of the matching liquid is sufficient to fill the connection points of the embedded optical fiber and the inserted optical fiber when the optical fiber connector is assembled with the optical fiber; when the inserted optical fiber is assembled with the optical fiber connector, the processed optical fiber core is inserted into the side of the embedded optical fiber from the core penetrating hole, after the fiber core is inserted in place, the inserted optical fiber is first fixed on the connecting block through the tail sleeve, and then the slide frame is pushed to the tail sleeve side along the frame sliding groove, the pushing block moves synchronously with the tail sleeve, the pushing plate moves synchronously with the pushing block, the pushing plate contacts the end of the slot close to the tail sleeve, the liquid blocking plate is pushed to the outside of the plate sliding groove, the upper and lower liquid injection holes of the plate sliding groove are communicated, the elastic triangular plate is extruded and shrunk when the plug rod hole passes through the elastic triangular plate, and the elastic triangular plate returns to the original state after the plug rod hole slides through the elastic triangular plate, at this time, the pushing block is located at the side of the straight edge of the elastic triangular plate, and through the action of pushing the slide frame to the tail sleeve side, the communication between the liquid injection cavity and the core penetrating hole is realized, and the limiting of the pushing block and the piston rod during reverse movement is also realized; after the slide frame is pushed to the end of the frame sliding groove close to the tail sleeve, the slide frame is reversely pushed to the original position, at this time, the piston rod moves together with the slide frame due to the limiting of the straight edge of the elastic triangular plate and the pushing block, the piston rod pushes the liquid injection plug to extrude the matching liquid in the liquid injection cavity into the core penetrating hole through the liquid injection hole, and the gap between the embedded optical fiber and the inserted optical fiber is filled; since the pushing plate does not contact the slot during reverse movement, only slides along the slot, the liquid blocking plate does not move with the pushing plate, thereby avoiding the liquid blocking plate from blocking the liquid injection hole and hindering the injection of the matching liquid during the injection of the matching liquid; after the slide frame is pushed back to the original position, the liquid injection plug is located at one end of the liquid injection cavity close to the ferrule, the side surface of the liquid injection plug blocks the liquid injection hole, thereby avoiding the backflow of the matching liquid, the liquid blocking plate and the plate sliding groove form a seal, and the leakage of the matching liquid from the plate sliding groove is avoided.

[0009] Specifically, the core penetrating hole is provided with an exhaust hole communicating outside the connecting block on the side opposite to the liquid injection hole. Through the exhaust hole opposite to the liquid injection hole, the air in the core penetrating hole is injected with the matching liquid, and is discharged outside the connecting block through the exhaust hole. The slide frame blocks the exhaust hole after being reset, thereby realizing the sealing of the exhaust hole.

[0010] Specifically, the inner side of the slide frame is fixedly provided with a sealing gasket corresponding to the exhaust hole. When the slide frame is located at one end of the frame sliding groove close to the ferrule, the elastic gasket blocks the exhaust hole, thereby greatly improving the sealing performance of the exhaust hole and enabling the matching liquid to flow out of the exhaust hole.

[0011] Specific, the outer side of the slide is fixedly provided with a push block, and recesses are formed in the two sides of the moving direction of the push block. In the scheme, the friction between the slide and the hand is increased through the push block, and the fingers hold the recesses on the two sides of the push block, so that the slide can be pushed more labor-saving.

[0012] Specific, the core hole is divided into a core passing section and a cladding section, the core passing section is close to the ferrule, and the diameter of the cladding section is greater than that of the core passing section. By limiting the cladding section of the inserted optical fiber through the cross section of the core passing section, it is avoided that the inserted optical fiber is inserted too deeply, and the end face damage caused by the direct contact between the core of the inserted optical fiber and the pre-buried optical fiber is avoided.

[0013] Specific, a slope is formed in the connecting block from the cladding section to the core passing section. When the end of the core contacts the slope, it is guided into the core passing section, avoiding that the core is stuck by the cross section of the core passing section before being inserted in place.

[0014] Specific, the end of the cladding section connected to the outside of the connecting block is provided with a trumpet mouth. Through the trumpet mouth, the core is more easily inserted into the core hole when inserting the core.

[0015] Specific, the piston rod is further fixedly provided with a leak-proof plug on one side in the liquid injection cavity, and the leak-proof plug is tightly attached to the liquid injection cavity. The leak-proof plug plays an insurance role, so that the liquid injection plug can still ensure the sealing of the matching liquid in the liquid injection cavity in the case of leakage.

[0016] Specific, the connecting block is fixedly provided with a threaded pipe at the other end of the ferrule, the tail sleeve is screwed with the threaded pipe, and an observation port is formed in one side of the threaded pipe. Through the observation port, the core hole on the connecting block can be directly observed by the human eye, and the core of the inserted optical fiber can be aligned with the core hole for insertion.

[0017] Specific, a positioning groove is formed in the threaded pipe opposite the observation port. By placing the cladding of the inserted optical fiber on the positioning groove, the parallelism between the inserted optical fiber and the core hole can be ensured, so that the insertion of the core is more smooth, and friction between the core and the inner wall of the core hole is avoided.

[0018] The present application has the following advantages:

[0019] The present application seals the matching liquid in the liquid injection cavity through the liquid blocking plate and the liquid injection plug, avoids the pollution and deterioration of the matching liquid caused by the contact with air, and also avoids the leakage of the matching liquid, so that the amount of the matching liquid is sufficient to fill the splicing points of the pre-buried optical fiber and the inserted optical fiber when the optical fiber connector and the optical fiber are assembled; by pushing the slide to one side of the tail sleeve, the communication between the liquid injection cavity and the core hole is realized, and the limiting of the push block to the piston rod when moving in the opposite direction is realized;

[0020] The liquid blocking plate is not moved along with the pushing plate by the pushing plate not contacting with the slot during reverse movement, so that the liquid blocking plate does not block the liquid injection hole during injection of the matching liquid, and injection of the matching liquid is not hindered.

[0021] After the injection is completed, the injection hole is blocked by the side of the injection plug, so that backflow of the matching liquid is avoided, and the liquid blocking plate and the plate sliding groove form a seal, so that leakage of the matching liquid from the plate sliding groove is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 It is a schematic diagram of the optical fiber connector structure of the application;

[0023] Fig. 2 It is a schematic diagram of the main body structure of the application;

[0024] Fig. 3 It is a schematic diagram of the matching liquid device structure of the application;

[0025] Fig. 4 It is a top view of the main body of the application;

[0026] Fig. 5 It is a top view of the main body of the application;

[0027] In the figure: 1-outer sheath, 2-main body, 3-tail cover, 4-matching liquid device, 5-insert core, 6-pre-buried optical fiber, 7-connection block, 8-core penetrating hole, 9-sliding carriage, 10-liquid blocking plate, 11-injection plug, 12-piston rod, 13-pushing block, 14-pushing block, 15-sliding groove, 16-injection cavity, 17-slot, 18-sliding groove, 19-injection hole, 20-plug rod hole, 21-elastic triangular plate, 22-slot, 23-vent hole, 24-sealing gasket, 25-pushing carriage block, 26-groove, 27-core penetrating section, 28-cladding section, 29-flared mouth, 30-leakage prevention plug, 31-threaded tube, 32-viewing port, 33-positioning groove. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the application clearer and more understandable, the application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the application and are not used to limit the application, that is, the described examples are only a part of the examples of the application, but not all the examples. The components of the application embodiments described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] The following detailed description of embodiments of the application in the drawings provided is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. Based upon the embodiments of the application, all other embodiments obtained by persons of ordinary skill in the art without creative work are within the scope of the application claimed.

[0030] It should be noted that the relational terms herein, such as first and second, and the like, are used solely to distinguish one from another entity or action, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... a" does not, without more limitations, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0031] The application will be further described below in conjunction with the drawings, but the scope of the application is not limited to the following description.

[0032] As shown in Figs. 1-5 Fig. 1, it comprises an outer sheath 1, a main body 2, a tail sheath 3 and a matching liquid device 4, the tail sheath 3 is connected to one end of the main body 2, the outer sheath 1 is sleeved on the main body 2, and the matching liquid device 4 is arranged in the main body 2;

[0033] The main body 2 comprises a plug core 5, a pre-buried optical fiber 6 and a connecting block 7, the connecting block 7 is provided with a through core hole 8 penetrating through the connecting block 7, one end of the plug core 5 is fixedly arranged on the connecting block 7, one end of the pre-buried optical fiber 6 is arranged in the plug core 5, and the other end of the pre-buried optical fiber 6 is fixedly arranged in the through core hole 8;

[0034] The matching liquid device 4 comprises a sliding frame 9, a liquid blocking plate 10, a liquid injection plug 11, a piston rod 12, a pushing block 13 and a pushing plate 14, the sliding frame 9 is partially slidably arranged in the frame sliding groove 15, the liquid injection cavity 16 is formed in the connecting block 7, the liquid injection plug 11 is slidably arranged in the liquid injection cavity 16, the connecting block 7 is provided with a missing groove 17 on one side of the liquid injection cavity 16, one end of the piston rod 12 is fixedly connected with the liquid injection plug 11, the other end of the piston rod 12 extends into the missing groove 17, the plate sliding groove 18 is formed between the liquid injection cavity 16 and the through-hole 8, one end of the plate sliding groove 18 is communicated with the missing groove 17, the liquid blocking plate 10 is partially slidably arranged in the plate sliding groove 18, the liquid injection hole 19 is formed in one side of the liquid injection cavity 16 and communicated with the through-hole 8, the pushing block 13 is fixedly arranged on the sliding frame 9, the plug rod hole 20 is formed in the pushing block 13 and slidably connected with the piston rod 12, a plurality of elastic triangular plates 21 are arranged on the piston rod 12, the inclined surface of the elastic triangular plate 21 faces the liquid injection plug 11, the height of the elastic triangular plate 21 is greater than the gap between the piston rod 12 and the plug rod hole 20, the slot 22 is formed in one side of the liquid blocking plate 10 along the axial direction of the piston rod 12, and the pushing plate 14 is fixedly arranged on the pushing block 13 and slidably arranged in the slot 22.

[0035] In the scheme, the optical fiber is composed of the fiber core of the inner layer, the cladding of the middle layer and the protective layer of the outer layer. When assembling the insertion optical fiber and the optical fiber connector, the tail sleeve 3 is first sleeved on the insertion optical fiber, the protective layer at one end of the insertion optical fiber is stripped by a special tool, part of the cladding is stripped, the exposed fiber core at the end is inserted into the main body 2, the protective layer of the insertion optical fiber is fixed on the main body 2 through the tail sleeve 3, the outer protective sleeve 1 is fixed on the main body 2, the installation of the optical fiber connector is completed, the connection and fixation of the outer protective sleeve 1 and the terminal equipment interface are realized through the joint on the outer protective sleeve 1, or the connection and fixation with other optical fiber connectors are realized through the coupler. In order to facilitate the adaptation with the existing optical fiber connector and terminal equipment, the joint adopts the common SC standard joint form.

[0036] The traditional straight-through optical fiber connector connection point is on the surface of the ferrule 5, the end face of the optical fiber extends to the surface of the ferrule 5, the cutting surface of the optical fiber is the end face, so the quality and length of the optical fiber cutting are required very strictly. A pre-embedded optical fiber 6 is pre-embedded in the ferrule 5, one end of the optical fiber extends to the end face of the ferrule 5, the pre-embedded optical fiber 6 and the ferrule 5 are pre-processed in the factory, and the optical performance of the end face is much higher than that of the cutting on site. One end of the ferrule 5 is fixed with the connecting block 7, the other end of the pre-embedded optical fiber 6 extends into the through-hole 8, and the insertion optical fiber is connected through the matching liquid, which greatly reduces the requirement of assembly operation.

[0037] In order to solve the problem of deterioration and pollution of the matching liquid in the optical fiber connector when it is in contact with air during storage, and the problem of leakage of the matching liquid, a matching liquid device 4 is arranged in the main body 2; the slide 9 is a hollow cuboid structure, the slide 9 is sleeved on the connecting block 7 through the slide groove 15, and the slide 9 can slide on the slide groove 15 in the axial direction of the core hole 8; when the optical fiber connector is not in use, the slide 9 is located at one end of the slide groove 15 close to the ferrule 5, the liquid blocking plate 10 is located at the deepest part of the plate slide groove 18, the liquid injection hole 19 is completely blocked, the matching liquid is filled in the liquid injection cavity 16, at this time, the liquid injection plug 11 is located at one end of the liquid injection cavity 16, so that the space between the end face of the liquid injection plug 11 and the liquid injection cavity 16 is in the maximum state, the liquid blocking plate 10 and the liquid injection plug 11 jointly seal the matching liquid in the liquid injection cavity 16, which avoids the pollution and deterioration of the matching liquid caused by the contact with air, and also avoids the leakage of the matching liquid, so that the amount of the matching liquid is sufficient to fill the joint point between the embedded optical fiber 6 and the inserted optical fiber when the optical fiber connector is assembled with the optical fiber; when the inserted optical fiber is assembled with the optical fiber connector, the treated optical fiber core is inserted from the side of the core hole 8 which is not inserted into the embedded optical fiber 6, after the fiber core is inserted in place, the inserted optical fiber is fixed on the connecting block 7 through the tail sleeve 3, then the slide 9 is pushed to the side of the tail sleeve 3 along the slide groove 15, the pushing block 13 moves synchronously with the tail sleeve 3, the pushing plate 14 moves synchronously with the pushing block 13, after the pushing plate 14 contacts one end of the slot 22 close to the tail sleeve 3, the liquid blocking plate 10 slides to the outside of the plate slide groove 18, so that the upper and lower liquid injection holes 19 of the plate slide groove 18 are communicated, when the plug rod hole 20 passes through the elastic triangular plate 21, the elastic triangular plate 21 is extruded and shrunk, after the plug rod hole 20 slides through the elastic triangular plate 21, the elastic triangular plate 21 returns to the original state, at this time, the pushing block 13 is located at the straight side of the elastic triangular plate 21, by pushing the slide 9 to the side of the tail sleeve 3, the communication between the liquid injection cavity 16 and the core hole 8 is realized, and the limiting of the pushing block 13 and the piston rod 12 during reverse movement is also realized; after the slide 9 is pushed to the end of the slide groove 15 close to the tail sleeve 3, the slide 9 is reversely pushed to the original position, at this time, because the straight side of the elastic triangular plate 21 limits the pushing block 13, the piston rod 12 moves together with the slide 9, the piston rod 12 pushes the liquid injection plug 11 to extrude the matching liquid in the liquid injection cavity 16 to the core hole 8 through the liquid injection hole 19, and the gap between the embedded optical fiber 6 and the inserted optical fiber is filled; because the pushing plate 14 does not contact the slot 22 during reverse movement, only slides along the slot 22, so the liquid blocking plate 10 does not move with the pushing plate 14, which avoids that the liquid blocking plate 10 blocks the liquid injection hole 19 during the injection of the matching liquid.After the carriage 9 is pushed back to the original position, the liquid injection plug 11 is located at one end of the liquid injection cavity 16 close to the plug core 5, and the side of the liquid injection plug 11 just blocks the liquid injection hole 19, avoiding the backflow of the matching liquid. The larger contact area between the liquid blocking plate 10 and the plate sliding groove 18 also avoids the leakage of the matching liquid from the plate sliding groove 18. Since the liquid blocking plate 10 is tightly attached to the plate sliding groove 18, and the liquid injection plug 11 is tightly attached to the liquid injection cavity 16, there is a damping force much greater than the pressure of the matching liquid. Therefore, after the injection of the matching liquid is completed, the density of the matching liquid in the core hole 8 will not change during the use of the fiber connector, ensuring the stability of the refractive index of the connection point between the inserted optical fiber and the embedded optical fiber 6, and avoiding the increase of the insertion loss of the fiber connector with use.

[0038] Further, the core hole 8 is provided with an exhaust hole 23 on the side opposite to the liquid injection hole 19. In this scheme, since there is air in the core hole 8, if the air is not discharged when the matching liquid is injected, the air will mix into the matching liquid, greatly affecting the refractive index of the matching liquid. Through the exhaust hole 23 opposite to the liquid injection hole 19, the air in the core hole 8 is discharged to the outside of the connecting block 7 along with the injection of the matching liquid. After the carriage 9 is reset, the exhaust hole 23 is blocked, realizing the sealing of the exhaust hole 23.

[0039] Further, the inner side of the carriage 9 is fixedly provided with a sealing pad 24 corresponding to the exhaust hole 23. In this scheme, the sealing pad 24 is an elastic rubber pad. When the carriage 9 is located at one end of the frame sliding groove 15 close to the plug core 5, the elastic pad just blocks the exhaust hole 23, greatly improving the sealing performance of the exhaust hole 23, and organizing the matching liquid to flow out of the exhaust hole 23.

[0040] Further, the outer side of the carriage 9 is fixedly provided with a pushing block 25, and the pushing block 25 is provided with grooves 26 on both sides in the moving direction. In this scheme, by means of the pushing block 25, the friction between the carriage 9 and the hand is increased, and the fingers can more easily push the carriage 9 by buckling the grooves 26 on both sides of the pushing block 25.

[0041] Further, the core hole 8 is divided into a core segment 27 and a cladding segment 28, the core segment 27 is close to the plug core 5, and the diameter of the cladding segment 28 is greater than that of the core segment 27. In this scheme, the cross-sectional diameter of the fiber cladding is greater than that of the core segment 27. When the cladding section of the inserted optical fiber contacts the connecting section of the core segment 27, the inserted optical fiber cannot continue to be inserted, avoiding the end face damage caused by the direct contact between the core of the inserted optical fiber and the embedded optical fiber 6.

[0042] Further, the connecting block 7 is provided with a slope inside the connecting block 7, which transitions from the cladding segment 28 to the core segment 27. In this scheme, the end of the core is guided to the core segment 27 when it contacts the slope, avoiding the core being stuck by the cross section of the core segment 27 before being inserted in place.

[0043] Further, the package layer section 28 is provided with a trumpet mouth 29 at the end outside the connecting block 7. In this scheme, the core is more easily inserted into the core hole 8 through the trumpet mouth 29.

[0044] Further, the piston rod 12 is fixedly provided with a leak-proof plug 30 at one side in the liquid injection cavity 16, and the leak-proof plug 30 is tightly combined with the liquid injection cavity 16. In this scheme, the leak-proof plug 30 plays the role of insurance, so that the liquid injection plug 11 can still ensure the sealing of the matching liquid in the liquid injection cavity 16 in the case of leakage.

[0045] Further, the connecting block 7 is fixedly provided with a threaded pipe 31 at the other end of the insertion core 5, the tail sleeve 3 is screwed with the threaded pipe 31, and the threaded pipe 31 is provided with an observation hole 32 at one side. In this scheme, the end of the threaded pipe 31 is also symmetrically provided with two optical fiber clamps, the tail sleeve 3 is provided with an internal thread at one end, and the diameter of the other end gradually decreases. After the insertion of the optical fiber is completed, the optical fiber clamps are located at the protective layer of the inserted optical fiber, the tail sleeve 3 is screwed on the threaded pipe 31, and with the rotation of the tail sleeve 3, the two clamps are squeezed by the tail sleeve 3 to clamp the inserted optical fiber; through the observation hole 32, the core hole 8 on the connecting block 7 can be directly observed by the human eye, so that the core of the inserted optical fiber can be aligned with the core hole 8 for insertion.

[0046] Further, the threaded pipe 31 is provided with a positioning groove 33 at the side opposite to the observation hole 32. In this scheme, by placing the cladding of the inserted optical fiber on the positioning groove 33, the parallelism of the inserted optical fiber and the core hole 8 can be ensured, so that the insertion of the core is more smooth, and the friction between the core and the inner wall of the core hole 8 is avoided.

[0047] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any skilled person in the art can make many possible changes and modifications to the technical solution of the present application, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of the present application. Therefore, any modification, equivalent change and modification of the above embodiments made by the technical personnel according to the technical solution of the present application, which does not depart from the content of the technical solution of the present application, all belong to the protection scope of the technical solution of the present application.

Claims

1. A fiber optic connector comprising: The utility model provides a kind of optical cable, including outer sheath (1), main body (2), tail cover (3) and matching liquid device (4), the tail cover (3) is connected in one end of main body (2), the outer sheath (1) is sleeved on main body (2), and the matching liquid device (4) is arranged in main body (2); The main body (2) includes a plug core (5), a pre-buried optical fiber (6), and a connecting block (7). The connecting block (7) is provided with a through hole (8) that penetrates through the connecting block (7). One end of the plug core (5) is fixedly arranged on the connecting block (7). One end of the pre-buried optical fiber (6) is arranged in the plug core (5). The other end of the pre-buried optical fiber (6) is fixedly arranged in the through hole (8). The matching liquid device (4) includes a sliding frame (9), a liquid blocking plate (10), a liquid injection plug (11), a piston rod (12), a pushing block (13), and a pushing plate (14). The connecting block (7) is provided with a sliding groove (15) corresponding to the sliding frame (9). The sliding frame (9) is partially arranged in the sliding groove (15). The connecting block (7) is provided with a liquid injection cavity (16). The liquid injection plug (11) is arranged in the liquid injection cavity (16). The connecting block (7) is provided with a missing groove (17) on one side of the liquid injection cavity (16), which is connected with the sliding groove (15). One end of the piston rod (12) is fixedly connected with the liquid injection plug (11). The other end of the piston rod (12) penetrates through the liquid injection cavity (16) and extends into the missing groove (17). The liquid injection cavity (16) is provided with a plate sliding groove (18) between the through hole (8). One end of the plate sliding groove (18) is connected with the missing groove (17). The liquid blocking plate (10) is partially arranged in the plate sliding groove (18). One side of the liquid injection cavity (16) is provided with a liquid injection hole (19) that penetrates through the plate sliding groove (18) and is connected with the through hole (8). The pushing block (13) is fixedly arranged on the sliding frame (9). The pushing block (13) is provided with a plug rod hole (20). The plug rod hole (20) is slidably connected with the piston rod (12). The piston rod (12) is provided with a plurality of elastic triangular plates (21). The inclined surface of the elastic triangular plate (21) faces the liquid injection plug (11). The height of the elastic triangular plate (21) is greater than the gap between the piston rod (12) and the plug rod hole (20). One side of the liquid blocking plate (10) is provided with a slot (22) along the axial direction of the piston rod (12). The pushing plate (14) is fixedly arranged on the pushing block (13). The pushing plate (14) is slidably arranged in the slot (22).

2. The fiber optic connector of claim 1, characterized by: The through hole (8) is provided with an exhaust hole (23) on the side opposite to the liquid injection hole (19), which is connected with the outside of the connecting block (7).

3. A fiber optic connector according to claim 2, wherein: The inner side of the sliding frame (9) is fixedly provided with a sealing gasket (24) corresponding to the exhaust hole (23).

4. The fiber optic connector of claim 1, wherein: The outer side of the sliding frame (9) is fixedly provided with a pushing frame block (25). The pushing frame block (25) is provided with a groove (26) on both sides of its moving direction.

5. The fiber optic connector of claim 1, wherein: The core-penetrating hole (8) is divided into a core-penetrating section (27) and a cladding section (28), the core-penetrating section (27) is close to the side of the core (5), and the diameter of the cladding section (28) is greater than that of the core-penetrating section (27).

6. A fiber optic connector according to claim 5, wherein: The connecting block (7) is internally provided with an inclined surface transitioning from the cladding section (28) to the core-penetrating section (27).

7. A fiber optic connector according to claim 5, wherein: The cladding section (28) is provided with a flared opening (29) at the end communicating with the outside of the connecting block (7).

8. The fiber optic connector of claim 1, wherein: The piston rod (12) is further fixedly provided with a leakage-proof plug (30) at one side in the liquid injection cavity (16), and the leakage-proof plug (30) is tightly attached to the liquid injection cavity (16).

9. The fiber optic connector of claim 1, wherein: The connecting block (7) is fixedly provided with a threaded tube (31) at the other end provided with the core (5), the tail cover (3) is threadedly connected with the threaded tube (31), and the threaded tube (31) is provided with an observation opening (32) at one side.

10. The fiber optic connector of claim 9, wherein: The threaded tube (31) is provided with a positioning groove (33) at one side opposite to the observation opening (32).

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