Through-wall LC optical fiber connector

Abstract

The invention relates to the technical field of optical fiber connectors, and discloses a through-wall type LC optical fiber connector, which comprises an insertion core assembly arranged in a main body shell, a stop dog in buckled connection with the right end of the main body shell, and a compression ring cylinder assembly connected with the right end of the stop dog, and is characterized in that the compression ring cylinder assembly is used for riveting and fixing an optical cable and a metal turning tail handle at the right end of the stop dog; according to the optical cable connector, the optical cable and the metal turning tail handle at the right end of the stopper are riveted and fixed through the pressing ring cylinder assembly, the tensile strength of the optical cable and the connector is greatly improved through combined riveting, and an aramid fiber yarn of the optical cable winds around the winding table, so that the friction force between the optical cable and the connector is increased; and the end cover compresses and fixes the optical cable aramid yarn in the wire passing groove in the optical cable aramid yarn, so that the tensile resistance between the optical cable and the connector is further improved after the connector and the optical cable are assembled. The rubber sealing assembly is tightly matched with the pressing ring cylinder assembly and the stop dog, and multiple sealing is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber connectors, in particular to a through-the-wall LC optical fiber connector. Background Art

[0002] LC fiber optic connectors are widely used in fiber optic connection systems due to their small size, stable connection performance, and high connection density. They are gradually replacing SC and FC connectors, especially in space-sensitive scenarios such as 5G base stations and compact devices. However, due to their small structure, the connection between the optical cable and the connector is not strong enough, especially when there is a requirement for through-the-wall wiring. It is difficult to meet the high tensile performance requirements between the optical cable and the connector. In addition, under complex construction conditions, the connection sealing of the optical cable and the connector has very high requirements. Otherwise, external dust, water vapor, etc. will enter the connector, causing the internal structure of the connector and the fiber core to be affected by the external environment. To this end, we have launched a through-the-wall LC fiber optic connector. Summary of the invention

[0003] The object of the present invention is to provide a through-the-wall LC optical fiber connector to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: A through-the-wall LC optical fiber connector, comprising a ferrule assembly installed in a main body shell, a stopper snap-connected to the right end of the main body shell, and a pressure ring barrel assembly connected to the right end of the stopper, wherein the pressure ring barrel assembly is used to fix the optical cable to the metal flower tail handle at the right end of the stopper by riveting, and the right end of the pressure ring barrel assembly is engaged and sealed on the outside of the optical cable; The outer side of the metal flower tail handle is sleeved with a rubber sealing component, and the left end of the pressure ring cylinder component is sleeved on the outer side of the rubber sealing component, and the rubber sealing component is pressed and sealed on the outer surface of the metal flower tail handle; A protective sleeve is sleeved on the outer side of the connection between the stopper and the pressure ring cylinder assembly.

[0005] Preferably, the ferrule assembly comprises a ceramic ferrule and a ferrule tail handle fixed by interference fit, the ferrule tail handle extends through a reserved hole at the left end of the main shell, and a spring sleeved on the ferrule tail handle abuts against the left end of the stopper.

[0006] Preferably, the ferrule tail handle comprises a sleeve for sleeve-connecting the spring and a plug connector connected to the left end of the sleeve through a limit plate; The right end of the ceramic ferrule is plugged into the plug connector, the plug connector extends out through the reserved hole, and the limit plate is clamped at the right end of the reserved hole.

[0007] Preferably, the two sides of the main body shell are provided with a first card slot and a U-shaped reserved slot in sequence from left to right; The stopper includes a stop head, a metal knurled tail handle provided at the right end of the stop head, and a snap barrel provided at the left end of the stop head; On both sides of the snap barrel, a first snap protrusion and a slotted groove are successively provided from left to right, and a second snap protrusion is provided at the left end of the slotted groove; While the first snap protrusion is stuck in the first card slot, the second snap protrusion is located in the U-shaped reserved slot to realize the snap connection between the main body shell and the stopper.

[0008] Preferably, a hollow outer frame is sleeved outside the main body shell. Second card slots are provided on both sides of the hollow outer frame, and a first limiting plane is provided on the top wall of the inner hole inside the hollow outer frame; A second limiting plane is provided at the top of the stop head; The right end of the hollow outer frame is sleeved on the stop head, so that the first limiting plane is in contact with the second limiting plane, and the second snap protrusion is stuck in the second card slot to realize the connection between the hollow outer frame and the stopper.

[0009] Preferably, a through-wall cap is sleeved outside the main body shell. An external thread is provided on the outer side of the left end of the stop head, an internal thread for threaded connection with the external thread is provided on the inner wall of the right end of the through-wall cap, and a wire passing hole is provided at the left end of the through-wall cap.

[0010] Preferably, the crimping ring barrel assembly includes a sleeve for sleeving on the metal knurled tail handle and a crimping barrel connected by a frustum-shaped hollow barrel at the right end of the sleeve. The diameter of the frustum-shaped hollow barrel gradually decreases from left to right; The optical cable includes a fiber core, a first inner cladding, a second inner cladding, and an optical cable outer sheath arranged in sequence from inside to outside, and optical cable aramid fibers are also provided between the second inner cladding and the optical cable outer sheath; The sleeve is used to rivet and fix the optical cable aramid fibers on the surface of the metal knurled tail handle. The inner wall of the crimping barrel is provided with a biting thread, and the optical cable outer sheath is bitten into the biting thread by stamping.

[0011] Preferably, the rubber sealing assembly includes a left sealing ring and a right sealing ring sleeved on the metal knurled tail handle; The sleeve is sleeved and pressed on the outside of the rubber sealing assembly; The left sealing ring and the right sealing ring are connected by a rubber strip; An annular card slot is provided inside the right sealing ring, and the right end of the metal knurled tail handle is hermetically stuck in the annular card slot.

[0012] Preferably, a frustum-shaped sealing end is provided at the right end of the right sealing ring and is closely attached to the inner wall of the frustum-shaped hollow barrel; A wire passing groove for passing the optical cable aramid fibers is provided between the frustum-shaped sealing end and the top of the right sealing ring, and an end cover is provided at the top of the wire passing groove.

[0013] Preferably, a plurality of sets of wire winding platforms are arranged in the wire groove, and the left end of the aramid fiber of the optical cable extends to the surface of the metal knurled tail handle after passing around the plurality of sets of wire winding platforms; The upper end of the wire winding platform is provided with a plug hole, and the plug post at the bottom of the end cover is inserted into the corresponding plug hole.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention rivets and fixes the optical cable to the metal knurled tail handle at the right end of the stopper through the press ring cylinder assembly, and the combined riveting greatly improves the tensile strength between the optical cable and the connector. Moreover, the aramid fiber of the optical cable bypasses the wire winding platform, increasing the friction between the two. And the end cover presses and fixes the aramid fiber of the optical cable in the wire groove to further improve the tensile resistance between the optical cable and the connector after the connector and the optical cable are assembled.

[0015] The rubber sealing assembly closely cooperates with the press ring cylinder assembly and the stopper to achieve multiple seals. The sleeve is sleeved and presses the rubber sealing assembly to seal it on the outer surface of the metal knurled tail handle; the annular card slot inside the right sealing ring catches the right end of the metal knurled tail handle, and the frustum-shaped sealing end closely adheres to the inner wall of the frustum-shaped hollow cylinder, effectively preventing external dust, water vapor, etc. from entering the connector, protecting the internal structure and fiber core from the influence of the external environment, and meeting the high requirements for connection tightness under complex construction conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic exploded view of the overall assembly of the present invention; Figure 2 is a schematic exploded view of the assembly of the main body shell, ferrule assembly and stopper of the present invention; Figure 3 is a schematic exploded view of the assembly of the stopper, rubber sealing assembly and press ring cylinder assembly of the present invention; Figure 4 is a schematic exploded view of the assembly of the hollow outer frame and the stopper of the present invention; Figure 5 is a schematic exploded view of the assembly of the wall-through cap and the stopper of the present invention; Figure 6 is a schematic view of the connection structure of the right sealing ring, left sealing ring and rubber strip of the present invention; Figure 7 is a schematic view of the structure of the end cover of the present invention; Figure 8 is a schematic view of the structure of the optical cable of the present invention; Figure 9 is a schematic view of the assembly structure of the optical cable, metal knurled tail handle and rubber sealing assembly of the present invention; Figure 10 is a schematic view of the assembly structure of the main body shell, stopper, rubber sealing assembly and optical cable of the present invention; Figure 11 It is a schematic diagram of the structure of the assembly of the stopper and the pressure ring cylinder assembly of the present invention; Figure 12 It is a schematic cross-sectional view of the pressure ring cylinder assembly of the present invention; Figure 13 It is a schematic diagram of the structure of the hollow outer frame, protective cover and optical cable assembly of the present invention; Figure 14 It is a schematic diagram of the structure of the wall cap, protective cover and optical cable assembly of the present invention; Figure 15 The figure is a cross-sectional structural diagram of the assembly of the stopper, the pressure ring cylinder assembly, the rubber sealing assembly, the protective sleeve and the optical cable of the present invention.

[0017] In the figure: 1. Main body shell; 101. First card slot; 102. U-shaped reserved slot; 103. Reserved hole; 2. Ferrule tail handle; 201. Plug connector; 202. Limiting plate; 203. Socket sleeve; 3. Ceramic ferrule; 4. Spring; 5. Stopper; 501. First buckle protrusion; 502. Second buckle protrusion; 503. External thread; 504. Metal turning handle; 505. Second limiting plane; 506. Buckle cylinder; 507. Stopper head; 508. Slot; 6. Hollow outer frame; 601. Second card slot; 602. First limiting plane; 7. Pressing ring cylinder assembly; 701. Engaging thread; 702. Sleeve; 703. Crimping cylinder; 704. Truncated cone-shaped hollow cylinder; 8. Protective cover; 9. Wall cap; 901. Internal thread; 902. Threading hole; 10. Rubber sealing assembly; 1001. Right sealing ring; 1002. Left sealing ring; 1003. Rubber strip; 1004. End cover; 10041. Connecting column; 1005. Cone-shaped sealing end; 1006. Wire groove; 1007. Winding table; 1008. Connecting hole; 1009. Annular slot; 11. optical cable; 111. outer sheath of optical cable; 112. aramid filament of optical cable; 113. second inner cladding; 114. first inner cladding; 115. fiber core. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Embodiment: Please refer to Figures 1-15 , the present invention provides a technical solution: A wall-penetrating LC fiber optic connector includes a ferrule assembly inserted into the main body shell 1, a stopper 5 snap-connected to the right end of the main body shell 1, and a compression ring barrel assembly 7 connected to the right end of the stopper 5; The ferrule assembly includes a ceramic ferrule 3 and a ferrule tail handle 2 fixed by interference fit. The ferrule tail handle 2 extends out through a reserved hole 103 at the left end of the main body shell 1. A spring 4 sleeved on the ferrule tail handle 2 abuts against the left end of the stopper 5.

[0020] The ferrule tail handle 2 includes a socket cylinder 203 for sleeving the spring 4 and a plug connector 201 connected to the left end of the socket cylinder 203 through a limiting disk 202; The right end of the ceramic ferrule 3 is inserted into the plug connector 201. Under the elastic force of the spring 4 on the ferrule tail handle 2, the plug connector 201 extends out through the reserved hole 103, and the limiting disk 202 is stuck at the right end of the reserved hole 103.

[0021] On both sides of the main body shell 1, a first card slot 101 and a U-shaped reserved slot 102 are successively provided from left to right; The stopper 5 includes a stop head 507, a metal knurled tail handle 504 provided at the right end of the stop head 507, and a snap cylinder 506 provided at the left end of the stop head 507; On both sides of the snap cylinder 506, a first snap protrusion 501 and a slotted groove 508 are successively provided from left to right. A second snap protrusion 502 is provided at the left end of the slotted groove 508; While the first snap protrusion 501 is stuck in the first card slot 101, the second snap protrusion 502 is located in the U-shaped reserved slot 102 to realize the snap connection between the main body shell 1 and the stopper 5.

[0022] On both sides of the main body shell 1, a first card slot 101 is designed, and on the stopper 5, a corresponding first snap protrusion 501 is designed. Through a snap connection (i.e., the first snap protrusion 501 is snapped in the first card slot 101), the stopper 5 fixes the ferrule tail handle 2 and the spring 4 on the main body shell 1; On both sides of the hollow outer frame 6, there are designed second card slots 601, and on the stopper 5, there are corresponding second snap protrusions 502. Through the snap connection (that is, the second snap protrusion 502 snaps into the second card slot 601), the stopper 5 fixes the main body shell 1 on the hollow outer frame 6; The stopper 5 is designed with left and right double snap positions (that is, the first snap protrusion 501 and the second snap protrusion 502). The first snap protrusion 501 is connected to the main body shell 1, and the second snap protrusion 502 is connected to the hollow outer frame 6, enabling repeated disassembly and use.

[0023] The press ring cylinder assembly 7 is used to rivet and fix the optical cable 11 to the metal knurled tail handle 504 at the right end of the stopper 5, and the right end of the press ring cylinder assembly 7 is bite-sealed on the outside of the optical cable 11; The press ring cylinder assembly 7 includes a sleeve 702 for sleeving on the metal knurled tail handle 504 and a crimping cylinder 703 connected to the right end of the sleeve 702 by a frustum-shaped hollow cylinder 704. The diameter of the frustum-shaped hollow cylinder 704 gradually decreases from left to right; The optical cable 11 includes a fiber core 115, a first inner cladding 114, a second inner cladding 113, and an optical cable outer sheath 111 arranged in sequence from the inside to the outside. And there is also an optical cable aramid fiber 112 between the second inner cladding 113 and the optical cable outer sheath 111; The press ring cylinder assembly 7 is stamped so that the sleeve 702 is used to rivet and fix the optical cable aramid fiber 112 on the surface of the metal knurled tail handle 504, so that the tensile strength between the optical cable 11 and the stopper 5 meets 80N; The inner wall of the crimping cylinder 703 is provided with a bite thread 701. Through stamping, the optical cable outer sheath 111 is bitten into the bite thread 701, so that the tensile strength between the optical cable outer sheath 111 and the stopper 5 meets 20N. The combined riveting improves the overall tensile strength of the optical cable 11 and the stopper 5.

[0024] And through stamping, the optical cable outer sheath 111 is bitten into the bite thread 701, which can realize the seal between the right end of the press ring cylinder assembly 7 and the optical cable 11.

[0025] A rubber sealing assembly 10 is sleeved on the outside of the metal knurled tail handle 504; The rubber sealing assembly 10 includes a left sealing ring 1002 and a right sealing ring 1001 sleeved on the metal knurled tail handle 504; The sleeve 702 is sleeved and pressed on the outside of the rubber sealing assembly 10, so that the left sealing ring 1002 and the right sealing ring 1001 are tightly sealed between the sleeve 702 and the metal knurled tail handle 504, both playing a sealing role; The left sealing ring 1002 and the right sealing ring 1001 are connected by a rubber strip 1003; An annular card slot 1009 is provided inside the right sealing ring 1001, and the right end of the metal knurled tail handle 504 is hermetically clamped in the annular card slot 1009, thus further realizing the sealing function of the right end of the metal knurled tail handle 504; A frustum-shaped sealing end head 1005 is provided at the right end of the right sealing ring 1001 and is closely attached to the inner wall of the frustum-shaped hollow cylinder 704, so that the right end of the metal knurled tail handle 504 and the inside of the pressure ring cylinder assembly 7 are sealed again; That is, through the arrangement of the rubber sealing assembly 10, multiple seals at the connection between the stopper 5 and the pressure ring cylinder assembly 7 can be realized, further improving the sealing effect and effectively preventing external substances from invading.

[0026] A wire groove 1006 for passing through the optical cable aramid fiber 112 is provided between the top of the frustum-shaped sealing end head 1005 and the right sealing ring 1001, and an end cover 1004 is provided at the top of the wire groove 1006.

[0027] A number of wire winding platforms 1007 are provided in the wire groove 1006. The left end of the optical cable aramid fiber 112 extends to the surface of the metal knurled tail handle 504 after passing around a number of wire winding platforms 1007. Since the optical cable aramid fiber 112 passes around the wire winding platforms 1007, the friction between the two is increased, so that after the rubber sealing assembly 10, the pressure ring cylinder assembly 7 and the stopper 5 are firmly assembled, the tensile resistance between the optical cable 11 and the stopper 5 can be improved; A plug hole 1008 is provided at the upper end of the wire winding platform 1007, and the plug post 10041 at the bottom of the end cover 1004 is inserted into the corresponding plug hole 1008. Such an arrangement facilitates the positioning and installation of the end cover 1004.

[0028] When the pressure ring cylinder assembly 7 is stamped so that the frustum-shaped sealing end head 1005 is closely attached to the inner wall of the frustum-shaped hollow cylinder 704, the end cover 1004 will be squeezed, pressing the optical cable aramid fiber 112 in the wire groove 1006 tightly and fixing it inside the optical cable aramid fiber 112. Thus, after the rubber sealing assembly 10, the pressure ring cylinder assembly 7 and the stopper 5 are firmly assembled, the tensile resistance between the optical cable 11 and the stopper 5 is further improved.

[0029] The left end of the pressure ring cylinder assembly 7 is sleeved outside the rubber sealing assembly 10, pressing and sealing the rubber sealing assembly 10 on the outer surface of the metal knurled tail handle 504; The sleeve 702 of the pressure ring cylinder assembly 7 is sleeved and pressed tightly outside the rubber sealing assembly 10, pressing and sealing the rubber sealing assembly 10 on the outer surface of the metal knurled tail handle 504, realizing the sealed connection between the stopper 5 and the pressure ring cylinder assembly 7, preventing external dust, water vapor, etc. from entering the inside of the connector, and protecting the internal structure and the fiber core 115 from the influence of the external environment.

[0030] The rubber sealing assembly 10 cooperates with the pressing ring cylinder assembly 7, the stopper 5, etc., and plays a certain role in the fixation and stress dispersion of the aramid fiber 112 of the optical cable, which helps to improve the tensile strength of the overall optical cable 11 and the connector.

[0031] A protective sleeve 8 is sleeved on the outside of the connection between the stopper 5 and the pressing ring cylinder assembly 7, and the right end of the optical cable 11 extends out through the right end of the protective sleeve 8. A hollow outer frame 6 is sleeved on the outside of the main body shell 1. Second card slots 601 are provided on both sides of the hollow outer frame 6, and a first limiting plane 602 is provided on the top wall of the inner hole inside the hollow outer frame 6. A second limiting plane 505 is provided on the top of the stopper head 507. The right end of the hollow outer frame 6 is sleeved on the stopper head 507, so that the first limiting plane 602 is in contact with the second limiting plane 505. Such a first limiting plane 602 and a second limiting plane 505 can perform anti-fooling operations and provide operation reliability. And the second buckle protrusion 502 is stuck in the second card slot 601 to realize the connection between the hollow outer frame 6 and the stopper 5.

[0032] A through-wall cap 9 is sleeved on the outside of the main body shell 1. An external thread 503 is provided on the outer side of the left end of the stopper head 507, and an internal thread 901 for threaded connection with the external thread 503 is provided on the inner wall of the right end of the through-wall cap 9. Through such a threaded connection, the through-wall tensile strength of the through-wall type LC optical fiber connector can meet 140 N. A wire passing hole 902 is provided at the left end of the through-wall cap 9.

[0033] Specifically, during use, the ceramic ferrule 3 and the ferrule tail handle 2 are fixed by interference fit. The ferrule tail handle 2 is turned into the main body shell 1. The spring 4 is sleeved on the socket cylinder 203 of the ferrule tail handle 2. The stopper 5 is fixed to the main body shell 1 by snap connection to complete the assembly of the main body structure.

[0034] The pressing ring cylinder assembly 7 and the protective sleeve 8 are adapted to be used for connecting an optical cable with a diameter of φ1.2~φ2.4 mm. The pressing ring cylinder assembly 7 rivets and fixes the optical cable 11 to the metal knurled tail handle 504 of the stopper 5, and the protective sleeve 8 is put on to cover the connection between the stopper 5 and the pressing ring cylinder assembly 7.

[0035] The hollow outer frame 6 is fixed to the stopper 5 by snap connection to complete the overall assembly of the through-wall type LC optical fiber connector. The left end of the fiber core 115 extends out through the left end of the ceramic ferrule 3. The ceramic ferrule 3 extends out a certain distance through the left end of the hollow outer frame 6, and then the ceramic ferrule 3 is ground and tested to make the connection performance of the product meet the use requirements.

[0036] When wall-piercing construction is to be carried out, the hollow outer frame 6 is removed with a disassembly jig, and then the wall-piercing cap 9 is screwed to be threadedly connected to the stopper 5. After being firmly fixed, the pull rope can be passed through the wire threading hole 902 and then the wire pulling operation can be carried out. After the construction is completed, the wall-piercing cap 9 is unscrewed, and then the hollow outer frame 6 and the stopper 5 are fixed to restore the use as a connector.

[0037] The present invention adopts a combined installation structure of a stopper 5, a hollow outer frame 6, a wall-piercing cap 9, etc., which can realize the multi-function of assembling the wall-piercing cap 9 for use during wall piercing and assembling the hollow outer frame 6 for use when connecting devices. Moreover, the wall-piercing cap 9 and the hollow outer frame 6 can be repeatedly disassembled and assembled for use, with low usage cost.

[0038] 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 spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wall-penetrating LC fiber optic connector, comprising a ferrule assembly installed in a main body housing, a stopper snap-connected to the right end of the main body housing, and a compression ring cylinder assembly connected to the right end of the stopper, characterized in that: The pressing ring cylinder assembly is used to rivet and fix the optical cable to the metal knurled tail handle at the right end of the stopper, and the right end of the pressing ring cylinder assembly is bite-sealed outside the optical cable; A rubber sealing assembly is sleeved outside the metal knurled tail handle, and the left end of the pressing ring cylinder assembly is sleeved outside the rubber sealing assembly, pressing and sealing the rubber sealing assembly on the outer surface of the metal knurled tail handle; A protective sleeve is sleeved outside the connection between the stopper and the pressing ring cylinder assembly.

2. The through-wall LC optical fiber connector according to claim 1, wherein: The ferrule assembly includes a ceramic ferrule and a ferrule tail handle fixed by interference fit. The ferrule tail handle extends out through a reserved hole at the left end of the main body shell, and a spring sleeved on the ferrule tail handle abuts against the left end of the stopper.

3. The wall-penetrating LC fiber optic connector according to claim 2, characterized in that: The ferrule tail handle includes a socket cylinder for sleeving the spring and a socket joint connected to the left end of the socket cylinder through a limiting disc; The right end of the ceramic ferrule is inserted into the socket joint, the socket joint extends out through the reserved hole, and the limiting disc is stuck at the right end of the reserved hole.

4. A wall-penetrating LC fiber optic connector according to claim 1, characterized in that: First clamping grooves and U-shaped reserved grooves are sequentially arranged on both sides of the main body shell from left to right; The stopper includes a stop head, a metal knurled tail handle arranged at the right end of the stop head, and a snap cylinder arranged at the left end of the stop head; First snap protrusions and slots are sequentially arranged on both sides of the snap cylinder from left to right, and second snap protrusions are arranged at the left end of the slot; While the first snap protrusion is stuck in the first clamping groove, the second snap protrusion is located in the U-shaped reserved groove to realize the snap connection between the main body shell and the stopper.

5. The through-wall LC fiber optic connector according to claim 4, wherein: A hollow outer frame is sleeved outside the main body shell. Second clamping grooves are arranged on both sides of the hollow outer frame, and a first limiting plane is arranged on the top wall of the inner hole inside the hollow outer frame; A second limiting plane is arranged on the top of the stop head; The right end of the hollow outer frame is sleeved on the stop head, so that the first limiting plane is attached to the second limiting plane, and the second snap protrusion is stuck in the second clamping groove to realize the connection between the hollow outer frame and the stopper.

6. The through-wall LC optical fiber connector according to claim 4, wherein: A through-wall cap is sleeved outside the main body shell. An external thread is arranged on the outer side of the left end of the stop head, an internal thread for threaded connection with the external thread is arranged on the inner wall of the right end of the through-wall cap, and a wire passing hole is arranged at the left end of the through-wall cap.

7. The wall-penetrating LC fiber optic connector according to claim 1, characterized in that: The pressing ring cylinder assembly includes a sleeve for sleeving on the metal knurled tail handle and a crimping cylinder connected by a frustum-shaped hollow cylinder at the right end of the sleeve. The diameter of the frustum-shaped hollow cylinder gradually decreases from left to right; The optical cable includes a fiber core, a first inner cladding, a second inner cladding and an optical cable outer sheath arranged in sequence from inside to outside, and optical cable aramid fibers are also arranged between the second inner cladding and the optical cable outer sheath; The sleeve is used to rivet and fix the optical cable aramid fibers on the surface of the metal knurled tail handle. The inner wall of the crimping cylinder is provided with bite threads, and the optical cable outer sheath is bitten into the bite threads by stamping.

8. The through-wall LC optical fiber connector according to claim 7, characterized in that: The rubber sealing assembly includes a left sealing ring and a right sealing ring sleeved on the metal knurled tail handle; The sleeve is sleeved and pressed tightly outside the rubber sealing assembly; The left sealing ring and the right sealing ring are connected by a rubber strip; An annular clamping groove is arranged inside the right sealing ring, and the right end of the metal knurled tail handle is sealingly stuck in the annular clamping groove; 9. The wall-penetrating LC fiber optic connector according to claim 8, wherein: A frustum-shaped sealing end is arranged at the right end of the right sealing ring and is closely attached to the inner wall of the frustum-shaped hollow cylinder; A wire groove for passing through the aramid fiber of the optical cable is provided between the frustum-shaped sealing end head and the top of the right sealing ring, and an end cover is provided on the top of the wire groove.

10. A wall-penetrating LC optical fiber connector according to claim 9, characterized in that: A number of wire winding platforms are provided in the wire groove, and the left end of the aramid fiber of the optical cable extends to the surface of the metal knurled tail handle after passing around a number of wire winding platforms. Insertion holes are provided at the upper ends of the wire winding platforms, and the insertion posts at the bottom of the end cover are inserted into the corresponding insertion holes.

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