CN114019614A

CN114019614A - Outdoor optical fiber connector and optical fiber adapter

Info

Publication number: CN114019614A
Application number: CN202111231673.4A
Authority: CN
Inventors: 吴明; 吴体荣; 朱礼吉
Original assignee: Nanjing Huamai Technology Co Ltd
Current assignee: Nanjing Huamai Technology Co Ltd
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2022-02-08
Anticipated expiration: 2041-10-22
Also published as: CN114019614B

Abstract

The invention discloses an outdoor optical fiber connector and an optical fiber adapter, wherein the outdoor optical fiber connector comprises an SC internal part, an inserting core, an inner clamp, a circular hoop, a rotating shaft, an inner rod, an optical fiber, a protective cap, a pressure ring, a heat-shrinkable tube and a tail sheath, wherein the inserting core is arranged in the SC internal part and the inner clamp; the optical fiber adapter comprises a main body seat, a ceramic sleeve, a U-shaped clamp, a nut and an end cap, when the optical fiber adapter is connected with the outdoor optical fiber connector, the front end of the main body seat is inserted into a circular hoop in the outdoor optical fiber connector, and a ferrule in the outdoor optical fiber connector is inserted into the ceramic sleeve of the optical fiber adapter.

Description

Outdoor optical fiber connector and optical fiber adapter

Technical Field

The invention relates to the technical field of optical fiber connection, in particular to an outdoor optical fiber connector and an optical fiber adapter.

Background

Fiber optic connectors are indispensable optical communication connection elements for Fiber To The Home (FTTH), mainly used for The "last kilometer" of FTTH Fiber To The Home, and are generally installed on optical communication distribution equipment near residential areas.

Currently, the most common connection methods are: adapter, tail optical fiber and field assembly formula optic fibre connect the subassembly soon, its waterproof performance is relatively poor, generally can only use in indoor, and the outdoor environment is used in to a few. Due to poor water resistance, the above optical fiber assembly can generally be used only inside optical communication equipment; during each construction, the optical communication equipment is opened, and then a tail fiber is inserted or an optical fiber quick-connection assembly is manufactured on site to realize the termination of the optical fiber. Thus, the construction time is prolonged, communication signals of opened customers can be influenced, and constructed optical fibers in the interior can be damaged. Meanwhile, when the field assembly type optical fiber quick connection assembly is manufactured on the field, the requirement on the quality of constructors is high, and if the installation quality is not high, optical signals can be greatly attenuated. Therefore, the existing optical fiber splicing product cannot meet the requirements of single-person operation, quick construction, plug and play, high quality and quality consistency of constructors.

Disclosure of Invention

Based on the problems, the invention provides an outdoor optical fiber connector and an optical fiber adapter, which have the advantages that the outdoor optical fiber connector and the optical fiber adapter can be used in an outdoor environment, the installation steps are simplified, and the outdoor optical fiber connector and the optical fiber adapter are convenient to install outdoors quickly.

On one hand, the invention provides an outdoor optical fiber connector, which comprises an SC internal part, an inserting core, an inner clamp, a round hoop, a rotating shaft, an inner rod, an optical fiber, a protective cap, a pressing ring, a heat-shrinkable tube and a tail sheath, wherein the rotating shaft is in a hollow step-shaped cylindrical shape, the round hoop is arranged in the large-diameter end of the rotating shaft, the inner rod is arranged in the small-diameter end of the rotating shaft, the SC internal part is buckled with the inner clamp, the inserting core is arranged in the SC internal part and the inner clamp, the inner clamp is arranged in the round hoop and penetrates out of the round hoop to be connected with the inner rod in the rotating shaft, the stripped optical fiber is connected in the inserting core after penetrating through the inner rod, the pressing ring is arranged at the tail part of the inner rod and is used for pressing an aramid fiber wire on the inner rod, the heat-shrinkable tube is used for wrapping the joint of the inner rod and the optical fiber, the tail sheath is sleeved on the outer side of the heat-shrinkable tube, and one end of the tail sheath is connected to the tail part of the pressing ring;

an annular positioning cylinder is arranged in the circular hoop, the annular positioning cylinder and the outer wall of the circular hoop are arranged at intervals, an inserting cylinder is arranged at the end part of the protective cap, and the inserting cylinder is used for being inserted between the outer wall of the circular hoop and the positioning cylinder.

The invention is further provided with a first sealing ring arranged between the circular hoop and the rotating shaft, and a first U-shaped groove used for installing the first sealing ring is arranged on the outer side of the end part of the circular hoop; a second sealing ring is arranged between the inner rod and the rotating shaft, and a second U-shaped groove for mounting the second sealing ring is arranged on the outer side of the tail end of the inner rod; the protective cap is provided with a third sealing ring, and a third U-shaped groove used for installing the third sealing ring is formed in the outer side of the root of the inserting cylinder.

The invention is further arranged that at least one clamping jaw is arranged on the side wall of the round hoop and faces to the buckle of the inner side of the round hoop, the inner profile section of the position of the rotating shaft, which is opposite to the buckle, is oval, the length of the short axis of the oval is equal to the radius of the outer profile circle at the buckle position of the round hoop, a first big mouth groove corresponding to the buckle is arranged on the side surface of the inserting cylinder, and a first wedge block used for buckling with the buckle is arranged in the first big mouth groove; the circular hoop is also provided with an arc C-shaped guide groove, the rotating shaft is provided with a limiting guide block extending into the C-shaped guide groove, and two limit positions of the limiting guide block in the C-shaped guide groove respectively correspond to two states of the rotating shaft pressing and releasing from the buckle; the tail part of the rotating shaft is provided with a pit, the inner rod is provided with a convex hull matched with the pit, and the pit is occluded with the convex hull when the rotating shaft rotates to a state of pressing or disengaging the buckle; the inner side of the circular hoop is provided with at least one directional guide block which is used for being inserted into the large-opening groove.

The invention is further set up in that a D-shaped groove for the inner card to pass through is arranged at the bottom of the circular hoop, a D-shaped positioning block matched with the D-shaped groove in shape is arranged on the inner card, a large circular stop block is arranged above the D-shaped positioning block, the diameter of the large circular stop block is equal to the inner diameter of the annular positioning cylinder, an arc-shaped positioning block protruding out of an outer edge line is arranged at the edge of the large circular stop block, a first notch for the arc-shaped positioning block to pass through is arranged on the annular positioning cylinder, a first extending lug is arranged on the inner side of an inserting cylinder on the protective cap, and the first extending lug is positioned in the first notch after the inserting cylinder is inserted into the circular hoop; the top end of the annular positioning cylinder is provided with a second notch at a position opposite to the first notch.

The invention is further set up in that the tail of the inner clip is inserted into the inner rod, the tail of the inner clip is provided with at least one back-off, the positions of the inner clip on the two sides of the back-off are provided with notches to make the back-off elastic, the inner rod is provided with a fastening hole corresponding to the back-off position, and the back-off enters the fastening hole after the tail of the inner clip is inserted into the inner rod; the side surface of the tail part of the inner clamp is also provided with a rectangular pin block, and the inner rod is provided with a rectangular pin hole for the rectangular pin block to enter.

The invention is further provided with a first connecting belt, one end of the first connecting belt is connected to the protective cap, and the other end of the first connecting belt is connected to the inner rod; the top end of the protective cap is provided with a threading hole which radially penetrates through.

On the other hand, the invention also provides an optical fiber adapter, which is used for matching the outdoor optical fiber connector and comprises a main body seat, a ceramic sleeve, a U-shaped card, a nut and an end cap, wherein the main body seat is cylindrical, the main body seat is provided with a convex positioning plate, the part of the main body seat positioned on the front side of the positioning plate is an insertion part which is used for being inserted between the outer wall of a round hoop in the outdoor optical fiber connector and the positioning cylinder, the part of the main body seat positioned on the rear side of the positioning plate is an installation part which is provided with a thread used for being connected with the nut, the ceramic sleeve is installed in the U-shaped card, the U-shaped card is installed in the main body seat, the U-shaped card is provided with two clamping strips which are abutted against the inner wall of the main body seat, the outer sides of the clamping strips are provided with bulges, the side wall of the main body seat is provided with holes corresponding to the bulges, when the optical fiber adapter is connected with the outdoor optical fiber connector, the front end of the main body seat is inserted into the round hoop in the outdoor optical fiber connector, the insertion core in the outdoor optical fiber connector is inserted into the ceramic sleeve of the optical fiber adapter, and the end cap is used for being sleeved at the front end of the main body seat.

The invention is further provided that a fourth sealing ring is arranged on the outer side of the root part of the insertion part of the main body seat, and a fourth U-shaped groove for installing the fourth sealing ring is arranged on the insertion part of the main body seat; the inner side of the main body seat inserting part is provided with a second extending convex block, and after the main body seat inserting part is inserted into the circular hoop, the first extending convex block is positioned in the first gap.

The invention is further arranged that a second big mouth groove is arranged on the insertion part of the main body seat, a second wedge block is arranged in the second big mouth groove, when the optical fiber adapter is connected with the outdoor optical fiber connector, a buckle on a round hoop in the outdoor optical fiber connector enters the second big mouth groove and is buckled with the second wedge block, and a directional guide block on the round hoop enters the big mouth groove.

The invention further provides a second connecting belt and a dustproof cap, wherein one end of the second connecting belt is connected with the end cap, the other end of the second connecting belt is connected with the main body seat, the dustproof cap is used for being inserted into the mounting part on the main body seat, and the shape of the dustproof cap is matched with that of the U-shaped card.

In conclusion, the beneficial effects of the invention are as follows:

1. the outdoor optical fiber connector and the optical fiber adapter are matched for use and are used for optical fiber connection in outdoor environment, when the outdoor optical fiber connector is connected with the optical fiber adapter, the insertion part on the main body seat is inserted into the circular hoop, and the insertion part of the main body seat is positioned and guided through the inner wall of the circular hoop and the annular positioning cylinder, so that the insertion core in the outdoor optical fiber connector can be quickly and directly inserted into the ceramic sleeve in the optical fiber adapter to realize quick connection, the technical requirement on working personnel is low in the connection process, and the unified connection standard is facilitated;

2. after the outdoor optical fiber connector is connected with the optical fiber adapter, the SC inner part, the inserting core and the inner clamp are wrapped by the main body seat inserting part, the annular positioning cylinder, the circular hoop and the rotating shaft, so that the waterproof effect is better, the outdoor optical fiber connector is suitable for outdoor use, and the waterproof property of the outdoor optical fiber connector after being connected with the optical fiber adapter is improved by the first sealing ring, the second sealing ring and the fourth sealing ring, so that the outdoor optical fiber connector is beneficial to outdoor long-term use;

3. after the outdoor optical fiber connector and the optical fiber adapter are connected, the buckle is buckled with the second wedge block to lock the outdoor optical fiber connector and the optical fiber adapter, the buckle is pressed or separated through rotation of the rotating shaft, so that buckling and separation of the buckle and the second wedge block are realized, when the rotating shaft rotates, the rotation of the rotating shaft is limited through the limiting guide block in the C-shaped guide groove, and meanwhile, the rotating shaft is fixed to a certain degree after rotating in place through meshing of the concave pit and the convex hull, so that the rotating shaft is prevented from rotating randomly;

4. the inner clamp is fixed in the round hoop and is stable in position after being positioned by the D-shaped positioning block, the big round stop block and the like, the inner clamp is not easy to rotate and twist, the inner clamp is further positioned in the first notch by the arc-shaped positioning block, and after the outdoor optical fiber connector is connected with the optical fiber adapter, the second extending lug penetrates through the first notch to tightly press the arc-shaped positioning block to fix the inner clamp, so that the stability of the inner clamp is further improved, and the reliability of optical fiber connection is ensured; in addition, set up the second breach on annular location section of thick bamboo and be used for observing the optic fibre terminal surface when connecting optic fibre, be favorable to carrying out the calibration to optic fibre.

5. The mechanism design of the insertion cylinder on the protective cap is similar to the insertion part of the main body seat in the optical fiber adapter and is used for blocking an opening of the outdoor optical fiber connector when the outdoor optical fiber connector is not connected with the optical fiber adapter, so that dust, water vapor and the like are reduced, and meanwhile, an end cap is also arranged on the optical fiber adapter and used for protecting the optical fiber adapter.

Drawings

FIG. 1 is a general schematic view of an outdoor fiber optic connector of the present invention;

FIG. 2 is an exploded view of an outdoor fiber optic connector of the present invention;

FIG. 3 is a schematic view of the circular hoop of the present invention;

FIG. 4 is a schematic view of the SC inner part and inner card assembly of the present invention;

FIG. 5 is a schematic view of the SC inner part and the inside card assembly of the present invention from another perspective;

FIG. 6 is a schematic view of the assembly between the SC inner member and the inside card assembly and the round band in the present invention;

FIG. 7 is a schematic view of the bottom of the circular hoop of the present invention;

FIG. 8 is a schematic view of the inner rod of the present invention;

FIG. 9 is a schematic view of the inner rod from another perspective according to the present invention;

FIG. 10 is a schematic view of the construction of the rotating shaft according to the present invention;

FIG. 11 is a schematic view of another perspective of the hinge of the present invention;

fig. 12 is a schematic view of determining the direction of the SC inner according to the present invention by using a first notch and a second notch, where a is a horizontal viewing angle, b is a second notch direction viewing angle, and c is a second notch direction viewing angle;

FIG. 13 is a schematic view of the outdoor fiber optic connector of the present invention fully assembled;

FIG. 14 is a schematic view of the outdoor fiber optic connector protective cap of the present invention in an open position;

FIG. 15 is a cross-sectional view of an outdoor fiber optic connector of the present invention showing an elliptical profile of the shaft at the ferrule snap;

FIG. 16 is a schematic view of the connection between the outdoor fiber optic connector and the fiber optic adapter of the present invention, shown in the state where the latch is not pressed by the shaft;

FIG. 17 is a cross-sectional view of the position guide in the FIG. 16 state;

FIG. 18 is a schematic view of the connection between the outdoor fiber optic connector and the fiber optic adapter of the present invention, shown with the latch compressed by the shaft;

FIG. 19 is a cross-sectional view of the positive stop guide in the condition of FIG. 18;

FIG. 20 is an overall schematic view of a fiber optic adapter of the present invention;

FIG. 21 is an exploded view of a fiber optic adapter according to the present invention;

FIG. 22 is a schematic view of the internal structure of the fiber optic adapter of the present invention;

FIG. 23 is a schematic view of the fiber optic adapter of the present invention after assembly.

In the figure, 1, SC internals; 2. inserting a core; 3. an inner card; 301. d-shaped positioning blocks; 302. a large round stopper; 303. an arc-shaped positioning block; 304. reversing; 305. a rectangular pin block; 4. a circular hoop; 401. an annular positioning cylinder; 402. a first U-shaped groove; 403. buckling; 404. a first notch; 405. a second notch; 406. a D-shaped groove; 407. a C-shaped guide groove; 408. a directional guide block; 5. a rotating shaft; 501. a limiting guide block; 502. a pit; 6. an inner rod; 601. a second U-shaped groove; 602. a convex hull; 603. buckling holes; 604. a rectangular pin hole; 7. a protective cap; 701. inserting a cylinder; 702. a third U-shaped groove; 703. a first wide mouth groove; 704. a first wedge; 707. a first extension bump; 708. threading holes; 8. pressing a ring; 9. heat shrink tubing; 10. a tail sheath; 11. a spring; 12. a first seal ring; 13. a second seal ring; 14. a third seal ring; 15. a first connecting belt; 16. a main body seat; 161. positioning a plate; 162. an insertion portion; 163. an installation part; 164. a fourth U-shaped groove; 165. a second extension bump; 166. a second wide mouth groove; 167. a second wedge; 17. a ceramic sleeve; 18. a U-shaped card; 181. clamping the strip; 182. a protrusion; 19. a nut; 20. an end cap; 21. a fourth seal ring; 22. a second connecting band; 23. a dust cap; 24. an optical fiber.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings.

The first embodiment is as follows: referring to fig. 1 to 19, an outdoor optical fiber connector includes an SC inner member 1, an insert core 2, an inner ferrule 3, a circular hoop 4, a rotating shaft 5, an inner rod 6, an optical fiber 24, a protective cap 7, a press ring 8, a heat shrink tube 9 and a tail sheath 10, wherein the rotating shaft 5 is a hollow stepped cylinder, the circular hoop 4 is installed in a large diameter end of the rotating shaft 5, the inner rod 6 is installed in a small diameter end of the rotating shaft 5, the SC inner member 1 is buckled with the inner ferrule 3, the insert core 2 is installed in the SC inner member 1 and the inner ferrule 3, the inner ferrule 3 is installed in the circular hoop 4, the inner ferrule 3 penetrates out of the circular hoop 4 and is connected with the inner rod 6 in the rotating shaft 5, the stripped optical fiber 24 is connected in the insert core 2 after penetrating through the inner rod 6, the press ring 8 is arranged at the tail of the inner rod 6 for pressing an aramid fiber on the optical fiber 24 tightly on the inner rod 6, the heat shrink tube 9 is used for wrapping the press ring 8 and the joint of the inner rod 6 and the optical fiber 24, the tail sheath 10 is sleeved outside the press ring 9, one end of the tail sheath 10 is connected with the tail part of the inner rod 6;

an annular positioning cylinder 401 is arranged in the circular hoop 4, the annular positioning cylinder 401 and the outer wall of the circular hoop 4 are arranged at intervals, an inserting cylinder 701 is arranged at the end part of the protective cap 7, and the inserting cylinder 701 is used for being inserted between the outer wall of the circular hoop 4 and the positioning cylinder.

A first sealing ring 12 is arranged between the circular hoop 4 and the rotating shaft 5, and a first U-shaped groove 402 for mounting the first sealing ring 12 is arranged on the outer side of the end part of the circular hoop 4; a second sealing ring 13 is arranged between the inner rod 6 and the rotating shaft 5, and a second U-shaped groove 601 for mounting the second sealing ring 13 is arranged on the outer side of the tail end of the inner rod 6; and a third sealing ring 14 is arranged on the protective cap 7, and a third U-shaped groove 702 for mounting the third sealing ring 14 is arranged on the outer side of the root part of the insert cylinder 701.

The side wall of the round hoop 4 is provided with at least one clamping jaw towards the buckle 403 on the inner side of the round hoop 4, the inner profile section of the position of the rotating shaft 5 opposite to the buckle 403 is oval, the short axial length of the oval is equal to the radius of the outer profile circle at the buckle 403 of the round hoop 4, the side surface of the insert cylinder 701 is provided with a first large opening groove 703 corresponding to the buckle 403, and a first wedge block 704 used for buckling with the buckle 403 is arranged in the first large opening groove 703; the circular hoop 4 is also provided with an arc C-shaped guide groove 407, the rotating shaft 5 is provided with a limiting guide block 501 extending into the C-shaped guide groove 407, and two limit positions of the limiting guide block 501 in the C-shaped guide groove 407 respectively correspond to two states of the rotating shaft 5, namely a state of pressing and releasing the buckle 403; a pit 502 is arranged at the tail part of the rotating shaft 5, a convex hull 602 matched with the pit 502 is arranged on the inner rod 6, and when the rotating shaft 5 rotates to two states of pressing or disengaging the buckle 403, the pit 502 is meshed with the convex hull 602; at least one orientation guide block 408 is arranged on the inner side of the circular hoop 4, and the orientation guide block 408 is used for being inserted into the large-opening groove.

A D-shaped groove 406 for the inner card 3 to pass through is formed in the bottom of the circular hoop 4, a D-shaped positioning block 301 matched with the D-shaped groove 406 in shape is arranged on the inner card 3, a large circular stop 302 is arranged above the D-shaped positioning block 301, the diameter of the large circular stop 302 is equal to the inner diameter of the annular positioning cylinder 401, an arc-shaped positioning block 303 protruding out of an outer edge line is arranged at the edge of the large circular stop 302, a first notch 404 for the arc-shaped positioning block 303 to pass through is formed in the annular positioning cylinder 401, a first extending lug 707 is arranged on the inner side of an inserting cylinder 701 on the protective cap 7, and after the inserting cylinder 701 is inserted into the circular hoop 4, the first extending lug 707 is positioned in the first notch 404; the top end of the annular positioning cylinder 401 is provided with a second notch 405 at a position opposite to the first notch 404.

The second notch 405 is provided for viewing the end face of the optical fiber when the optical fiber is connected, which is beneficial to calibrating the optical fiber. Specifically, in the field of optical fiber movable connection, the ground end surface of the optical fiber movable connector is divided into two categories, i.e., a plane type (PC or UPC for short) and an inclined plane 8-degree or 9-degree angle (APC for short), according to the standard of the SC connector, the SC internal part 1 is directional, and the direction of the SC internal part 1 is observed and recognized through the second notch 405 and the first notch 404. Referring to fig. 12, when viewed from the vertical direction, the first notch 404 is used to identify the direction of the SC inner member 1, the outer side surface of the SC inner member 1 is beveled to be correctly installed, the end surface of the ferrule 2 is beveled leftwards and downwards to be correctly installed, if the two are not in accordance with the installation methods of the ferrule 2, the SC inner member 1 and the inner clip 3 to be correspondingly adjusted, the second notch 405 is located on the cambered surface on the opposite side of the first notch 404, and is used to observe that the end surface of the ferrule 2 is correspondingly beveled rightwards and downwards to be correctly installed when the two are viewed from the opposite side.

The tail of the inner card 3 is inserted into the inner rod 6, the tail of the inner card 3 is provided with at least one inverted buckle 304, notches are arranged at the positions, located on the two sides of the inverted buckle 304, of the inner card 3 to enable the inverted buckle 304 to have elasticity, a buckle hole 603 corresponding to the position of the inverted buckle 304 is formed in the inner rod 6, and after the tail of the inner card 3 is inserted into the inner rod 6, the inverted buckle 304 enters the buckle hole 603; the side surface of the tail part of the inner clamp 3 is also provided with a rectangular pin block 305, and the inner rod 6 is provided with a rectangular pin hole 604 for the rectangular pin block 305 to enter.

The safety helmet further comprises a first connecting belt 15, wherein one end of the first connecting belt 15 is connected to the protective cap 7, and the other end of the first connecting belt 15 is connected to the inner rod 6; the top end of the protective cap 7 is provided with a threading hole 708 which radially penetrates through.

When the protective cap 7 is inserted into the circular hoop 4, the inner wall of the insertion cylinder 701 is in contact with the annular positioning cylinder 401, the outer wall of the insertion cylinder 701 is in contact with the inner wall of the circular hoop 4, the first extending projection 707 enters the first notch 404 and is in contact with the arc-shaped positioning block 303, the first wedge block 704 enters the position of the buckle 403, and the directional guide block 408 on the inner side of the circular hoop 4 enters the large-opening groove to guide and position the insertion cylinder 701. At this time, the protective cap 7 can be locked by rotating the rotating shaft 5 to press the buckle 403, and when the protective cap 7 needs to be taken down, the rotating shaft 5 is reversed.

When the outdoor optical fiber connector is used, the ferrule 2 is arranged in the SC inner part 1, the spring 11 (the spring 11 is used for applying certain thrust to the ferrule 2) is sleeved on the ferrule 2, the front end of the inner clamp 3 is buckled in a tail clamping groove of the SC inner part 1, and the guide surface of the inner clamp 3 is correspondingly assembled with the surface of the SC inner part 1 with the inclined surface. A first sealing ring 12 is arranged in a first U-shaped groove 402 at the front end of the outer side of the round hoop 4; the second sealing ring 13 is arranged in the second U-shaped groove 601 at the tail end of the inner rod 6, one end of the first connecting sleeve is sleeved in the other groove at the tail end of the inner rod 6, the other end of the first connecting sleeve is sleeved in the corresponding groove arranged on the protective cap 7, and the third sealing ring 14 is sleeved in the third U-shaped groove 702 of the protective cap 7. And then sequentially penetrating a tail sheath 10, a heat-shrinkable tube 9, a pressure ring 8, an inner rod 6, a rotating shaft 5 and a circular hoop 4 into the optical fiber 24, injecting glue into the ferrule 2, penetrating the optical fiber 24 subjected to fiber stripping into the ferrule 2, drying according to the process requirements, and cutting the end face. Then the circular hoop 4 is sleeved into the front end of the rotating shaft 5, the first sealing ring 12 at the front end of the circular hoop 4 is in contact with the circular hole at the front end inside the rotating shaft 5, and the limiting guide block 501 in the rotating shaft 5 is arranged in the C-shaped groove at the bottom of the circular hoop 4. The inner card 3 is arranged in a D-shaped hole in the circular hoop 4, and a D-shaped positioning block 301 in the middle of the inner card 3 is correspondingly assembled with the D-shaped hole; then an inner rod 6 penetrates through a tail hole of the circular hoop 4 to be in axial butt joint with the inner clamp 3; then, sleeving aramid fiber filaments on the optical fibers 24 on the concave-convex annular surface at the tail part of the inner rod 6, sleeving the compression ring 8, tightly pressing the compression ring 8 by using a machine, sleeving the heat-shrinkable tube 9 until the compression ring is not pushed, and tightly wrapping the compression ring 8 and the optical fibers 24 after high-temperature heat shrinkage; the trailing sheath 10 is then pulled over until it is pushed. Corresponding marks are arranged on the outer wall of the protective cap 7, so that the direction can be quickly aligned when the protective cap 7 is used.

Example two: an optical fiber adapter, referring to fig. 20-23, for use with an outdoor optical fiber connector in the first embodiment, includes a main body seat 16, a ceramic sleeve 17, a U-shaped card 18, a nut 19, and an end cap 20, where the main body seat 16 is cylindrical, a protruding positioning plate 161 is disposed on the main body seat 16, a portion of the main body seat 16 located at a front side of the positioning plate 161 is an insertion portion 162 for being inserted between an outer wall of a round ferrule 4 and the positioning cylinder in the outdoor optical fiber connector, a portion of the main body seat 16 located at a rear side of the positioning plate 161 is a mounting portion 163, a screw thread for being connected with the nut 19 is disposed on the mounting portion 163, the main body seat 16 is configured to be mounted on a wiring box, the main body seat 16 can be fixed on the wiring box through the positioning plate 161 and the nut 19, and the insertion portion 162 of the main body seat 16 faces outward. The ceramic sleeve 17 is installed in the U-shaped clamp 18, the U-shaped clamp 18 is installed in the main body seat 16, two clamping strips 181 which are abutted to the inner wall of the main body seat 16 are arranged on the U-shaped clamp 18, the clamping strips 181 are SC type optical fiber connector symmetrical clamping strips 181, a cylindrical through hole is formed in the middle of the U-shaped clamp 18, the outer side is small and the inner side is large, the outermost side is horn-shaped, and the inner side is small and the outer side is large for installing a ceramic sleeve. The outer side of the clamping strip 181 is provided with a protrusion 182, the side wall of the main body seat 16 is provided with a hole corresponding to the protrusion 182, when the optical fiber adapter is connected with the outdoor optical fiber connector, the front end of the main body seat 16 is inserted into the circular hoop 4 in the outdoor optical fiber connector, the ferrule 2 in the outdoor optical fiber connector is inserted into the ceramic sleeve 17 of the optical fiber adapter, and the end cap 20 is used for being sleeved at the front end of the main body seat 16.

A fourth sealing ring 21 is arranged on the outer side of the root part of the insertion part 162 of the main body seat 16, and a fourth U-shaped groove 164 for installing the fourth sealing ring 21 is arranged on the insertion part 162 of the main body seat 16; the inner side of the insertion portion 162 of the main body seat 16 is provided with a second extending protrusion 165, and after the insertion portion 162 of the main body seat 16 is inserted into the circular hoop 4, the first extending protrusion 707 is located in the first notch 404.

The main body base 16 insertion portion 162 is provided with a second wide-mouth groove 166, a second wedge block 167 is arranged in the second wide-mouth groove 166, when the optical fiber adapter is connected with the outdoor optical fiber connector, a buckle 403 on the round hoop 4 in the outdoor optical fiber connector enters the second wide-mouth groove 166 and is buckled with the second wedge block 167, the orientation guide block 408 on the round hoop 4 enters the wide-mouth groove, and through the positioning of the orientation guide block 408, blind insertion during connection can be achieved, and installation difficulty is reduced.

The anti-dust card is characterized by further comprising a second connecting belt 22 and a dust cap 23, wherein one end of the second connecting belt 22 is connected with the end cap 20, the other end of the second connecting belt is connected to the main body seat 16, the dust cap 23 is used for being inserted into the mounting portion 163 on the main body seat 16, and the shape of the dust cap 23 is matched with that of the U-shaped card 18.

The overall structure of the insertion portion 162 of the main body socket 16 is similar to that of the insertion cylinder 701 of the helmet 7 in the first embodiment.

What has been described above is merely a preferred embodiment of the present invention, and no portion of the description is given here by design or means conventional in the art. It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.

Claims

1. An outdoor optical fiber connector is characterized by comprising an SC inner part (1), an inserting core (2), an inner clamp (3), a round hoop (4), a rotating shaft (5), an inner rod (6), an optical fiber (24), a protective cap (7), a pressing ring (8), a heat shrink tube (9) and a tail sheath (10), wherein the rotating shaft (5) is in a hollow step-shaped cylindrical shape, the round hoop (4) is arranged in a large-diameter end of the rotating shaft (5), the inner rod (6) is arranged in a small-diameter end of the rotating shaft (5), the SC inner part (1) is buckled with the inner clamp (3), the inserting core (2) is arranged in the SC inner part (1) and the inner clamp (3), the inner clamp (3) is arranged in the round hoop (4), the inner clamp (3) penetrates out of the round hoop (4) to be connected with the inner rod (6) in the rotating shaft (5), the stripped optical fiber (24) penetrates through the inner rod (6) to be connected in the inserting core (2), the compression ring (8) is arranged at the tail part of the inner rod (6) and used for compressing aramid fibers on the optical fibers (24) on the inner rod (6), the heat-shrinkable tube (9) is used for wrapping the compression ring (8) and the joint of the inner rod (6) and the optical fibers (24), the tail sheath (10) is sleeved on the outer side of the heat-shrinkable tube (9), and one end of the tail sheath (10) is connected to the tail part of the inner rod (6);

be equipped with annular location section of thick bamboo (401) in circle hoop (4), annular location section of thick bamboo (401) and circle hoop (4) outer wall interval set up, and the tip of helmet (7) is equipped with inserts a section of thick bamboo (701), inserts between a section of thick bamboo (701) and is used for inserting the outer wall and the location section of thick bamboo of circle hoop (4).

2. An outdoor optical fiber connector according to claim 1, wherein a first sealing ring (12) is arranged between the circular hoop (4) and the rotating shaft (5), and a first U-shaped groove (402) for installing the first sealing ring (12) is arranged outside the end part of the circular hoop (4); a second sealing ring (13) is arranged between the inner rod (6) and the rotating shaft (5), and a second U-shaped groove (601) for mounting the second sealing ring (13) is arranged on the outer side of the tail end of the inner rod (6); and a third sealing ring (14) is arranged on the protective cap (7), and a third U-shaped groove (702) for mounting the third sealing ring (14) is formed in the outer side of the root part of the inserting cylinder (701).

3. The outdoor optical fiber connector according to claim 1, wherein the side wall of the round hoop (4) is provided with at least one snap (403) facing the inside of the round hoop (4), the inner profile cross section of the position of the rotating shaft (5) opposite to the snap (403) is oval, the length of the oval short shaft is equal to the radius of the outer profile circle at the snap (403) of the round hoop (4), the side surface of the insert barrel (701) is provided with a first wide-mouth groove (703) corresponding to the snap (403), and a first wedge block (704) for being snapped with the snap (403) is arranged in the first wide-mouth groove (703); an arc C-shaped guide groove (407) is further formed in the circular hoop (4), a limiting guide block (501) extending into the C-shaped guide groove (407) is arranged on the rotating shaft (5), and two limit positions of the limiting guide block (501) in the C-shaped guide groove (407) respectively correspond to two states of the rotating shaft (5) in compression and disengagement with the buckle (403); a pit (502) is arranged at the tail part of the rotating shaft (5), a convex hull (602) matched with the pit (502) is arranged on the inner rod (6), and when the rotating shaft (5) rotates to two states of pressing or disengaging the buckle (403), the pit (502) is meshed with the convex hull (602); at least one directional guide block (408) is arranged on the inner side of the circular hoop (4), and the directional guide block (408) is used for being inserted into the large-opening groove.

4. The outdoor optical fiber connector according to claim 1, wherein a D-shaped groove (406) for the inner card (3) to pass through is formed in the bottom of the circular hoop (4), a D-shaped positioning block (301) matched with the D-shaped groove (406) in shape is arranged on the inner card (3), a large circular stop block (302) is arranged above the D-shaped positioning block (301), the diameter of the large circular stop block (302) is equal to the inner diameter of the annular positioning cylinder (401), an arc-shaped positioning block (303) protruding out of an outer edge line is arranged at the edge of the large circular stop block (302), a first notch (404) for the arc-shaped positioning block (303) to pass through is arranged on the annular positioning cylinder (401), a first extending protrusion (707) is arranged on the inner side of an insertion cylinder (701) on the protective cap (7), and after the insertion cylinder (701) is inserted into the circular hoop (4), the first extending protrusion (707) is located in the first notch (404); a second notch (405) is arranged at the position, opposite to the first notch (404), of the top end of the annular positioning cylinder (401).

5. The outdoor optical fiber connector as claimed in claim 1, wherein the tail of the inner card (3) is inserted into the inner rod (6), the tail of the inner card (3) is provided with at least one reverse buckle (304), notches are arranged on the inner card (3) at positions on two sides of the reverse buckle (304) to enable the reverse buckle (304) to have elasticity, a buckle hole (603) corresponding to the position of the reverse buckle (304) is arranged on the inner rod (6), and after the tail of the inner card (3) is inserted into the inner rod (6), the reverse buckle (304) enters the buckle hole (603); the side surface of the tail part of the inner clamp (3) is also provided with a rectangular pin block (305), and the inner rod (6) is provided with a rectangular pin hole (604) for the rectangular pin block (305) to enter.

6. The outdoor optical fiber connector according to claim 1, further comprising a first connecting band (15), wherein one end of the first connecting band (15) is connected to the protective cap (7) and the other end is connected to the inner rod (6); the top end of the protective cap (7) is provided with a threading hole (708) which radially penetrates through.

7. An optical fiber adapter used in cooperation with the outdoor optical fiber connector of any one of claims 1 to 6, comprising a main body seat (16), a ceramic sleeve (17), a U-shaped card (18), a nut (19) and an end cap (20), wherein the main body seat (16) is cylindrical, a protruding positioning plate (161) is arranged on the main body seat (16), the part of the main body seat (16) located at the front side of the positioning plate (161) is an insertion part (162) used for being inserted between the outer wall of a round hoop (4) in the outdoor optical fiber connector and the positioning plate, the part of the main body seat (16) located at the rear side of the positioning plate (161) is a mounting part (163), a thread used for connecting with the nut (19) is arranged on the mounting part (163), the ceramic sleeve (17) is arranged in the U-shaped card (18), the U-shaped card (18) is arranged in the main body seat (16), two clamping strips (181) arranged on the U-shaped card (18) are abutted against the inner wall of the main body seat (16), the outer side of the clamping strip (181) is provided with a protrusion (182), the side wall of the main body seat (16) is provided with a hole corresponding to the protrusion (182), when the optical fiber adapter is connected with the outdoor optical fiber connector, the front end of the main body seat (16) is inserted into a circular hoop (4) in the outdoor optical fiber connector, an insertion core (2) in the outdoor optical fiber connector is inserted into a ceramic sleeve (17) of the optical fiber adapter, and the end cap (20) is used for being sleeved at the front end of the main body seat (16).

8. The fiber optic adapter of claim 7, wherein a fourth sealing ring (21) is arranged outside the root of the insertion part (162) of the main body seat (16), and a fourth U-shaped groove (164) for installing the fourth sealing ring (21) is arranged on the insertion part (162) of the main body seat (16); the inner side of the insertion part (162) of the main body seat (16) is provided with a second extending lug (165), and after the insertion part (162) of the main body seat (16) is inserted into the circular hoop (4), the first extending lug (707) is positioned in the first notch (404).

9. The fiber optic adapter of claim 7, wherein the body mount (16) insertion portion (162) is provided with a second wide-mouth groove (166), and a second wedge (167) is provided in the second wide-mouth groove (166), when the fiber optic adapter is connected to the outdoor fiber optic connector, the catch (403) on the round ferrule (4) in the outdoor fiber optic connector enters the second wide-mouth groove (166) and is buckled with the second wedge (167), and the orientation guide (408) on the round ferrule (4) enters the wide-mouth groove.

10. The fiber optic adapter of claim 7, further comprising a second connecting strip (22) and a dust cap (23), wherein one end of the second connecting strip (22) is connected to the end cap (20) and the other end is connected to the main body seat (16), the dust cap (23) is used for being inserted into the mounting portion (163) of the main body seat (16), and the shape of the dust cap (23) is matched with that of the U-shaped card (18).