WO2020077700A1

WO2020077700A1 - Outdoor optical fiber connector

Info

Publication number: WO2020077700A1
Application number: PCT/CN2018/113983
Authority: WO
Inventors: 李尧乐
Original assignee: 深圳市飞博康光通讯技术有限公司
Priority date: 2018-10-18
Filing date: 2018-11-05
Publication date: 2020-04-23
Also published as: CN109270639B; CN109270639A

Abstract

An outdoor optical fiber connector for connecting an external optical cable comprises: a front frame sleeve, a white inner core, a ferrule assembly, a spring, a small white tube, a retainer ring, a crimp ring, a fastening device for fastening an optical fiber, a rear frame sleeve, and a tail sleeve. A second annular protrusion is provided at an outer side of the retainer ring. A first protrusion and a second protrusion having different sizes are provided within a first installation hole of the front frame sleeve. A first engagement recess engaging with the first protrusion is provided on the second annular protrusion. A second engagement recess engaging with the second protrusion is provided on the second annular protrusion. The retainer ring is engaged within the first installation hole. The first protrusion is engaged within the first engagement recess, and the second protrusion is engaged within the second engagement recess. When the retainer ring is fastened to the front frame sleeve, installation can only be achieved when the first protrusion is engaged within the first engagement recess and the second protrusion is engaged within the second engagement recess. The outdoor optical fiber of the present invention provides a better positioning effect in a circumferential direction, thereby preventing twisting of the inner core, providing superior splicing quality for optical fibers, avoiding fiber displacement after splicing, and achieving high reliability.

Description

Outdoor optical fiber connector

Technical field

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

Background technique

Outdoor optical fiber connector is a detachable (movable) device between optical fiber and optical fiber. It precisely butts the two end faces of the optical fiber, so that the optical energy output by the transmitting fiber can be coupled to the receiving fiber to the maximum. . After the installation of the existing outdoor optical fiber connector, the core wire is easy to rotate along the axis circumference, the axial positioning effect of the optical fiber connection is poor, the quality of the optical fiber core butt is poor, and the reliability is low.

Summary of the invention

The purpose of the present invention is to avoid the shortcomings in the prior art and provide an outdoor optical fiber connector with high quality of optical fiber butt joints, easy displacement of optical fibers after docking, and high reliability.

An outdoor optical fiber connector for connecting an external optical cable, comprising: a front frame sleeve with a first mounting hole, a white inner core, a ferrule assembly with a first convex ring on the outside, a spring, a small white tube, and a first inside A stop ring, a crimp ring, a fixing device for fixing the optical cable, a rear frame sleeve, and a tail sleeve; the small white tube is inserted into the rear end of the ferrule assembly, and the spring is sleeved on the small white Outside the tube, the front end of the spring bears against the first convex ring of the ferrule assembly, the stop ring is buckled and connected with the white inner core, the ferrule assembly, the spring and the small white The tube is installed in the first cavity formed by the snap ring and the white inner core buckling, the rear end of the spring bears against the first stop ring; the outside of the snap ring has a second protrusion A ring, a first bump and a second bump with different sizes are provided in the first mounting hole of the front frame sleeve, and a first matching with the first bump is provided on the second bump ring A snap groove, a second snap groove matched with the second bump is provided on the second convex ring, the stop ring snaps into the first mounting hole, so The first bump is caught in the first slot, the second bump is stuck in the second slot; the crimp ring is fixed to the tail of the stop ring, and the fixing device is provided Behind the crimp ring; the tail of the front frame sleeve is screwed to the rear frame sleeve; the white inner core, the ferrule assembly, the spring, the small white tube, the stop The moving ring, the crimp ring and the fixing device are disposed in the second cavity formed by the front frame sleeve and the rear frame sleeve, and the tail sleeve is sleeved on the tail portion of the rear frame sleeve.

Preferably, the fixing device is a fixed cylinder sleeved on the tail of the crimp ring, and the tail sleeve is a tail sleeve with a circular inner hole.

Preferably, an aluminum ring is provided on the outer side of the tail of the crimp ring.

Preferably, the above-mentioned fixing device includes two oppositely arranged fixing splints, and a third clamping slot and a first positioning column are provided inside the clamping plate, wherein the first positioning column of one of the clamping plates snaps into the other of the clamping plates In the third clamping slot, a first semicircular slot is provided on the inner side of the splint, two sides of the first semicircular slot are respectively provided with a second semicircular slot having a smaller radius than the first semicircular slot, and the two splints When fixed, two of the first semicircular grooves form a first round hole, two sets of the second semicircular grooves form two second round holes, and the tail sleeve is a flat tail sleeve with an inner hole.

Preferably, a first dispensing groove is provided in the second semicircular groove, a first dispensing hole is provided in the first dispensing groove, and a second dispensing hole is provided in the first semicircular groove.

Preferably, the above-mentioned fixing device has a first outer peripheral surface that gradually decreases toward the tail circumferential direction, the rear frame sleeve has a through hole that gradually decreases toward the tail circumferential direction, and the reduction length of the through hole of the same length is smaller than that of the first A large reduction in the outer peripheral surface.

Preferably, the tail portion of the rear frame sleeve is provided with a heat shrinkable tube with glue to fix the external cable.

Preferably, the outdoor optical fiber connector is further provided with a first waterproof ring and a second waterproof ring, and an inner side of the second external thread of the front frame sleeve is provided with a first waterproof groove, and the first waterproof ring sleeve In the first waterproof groove, the first waterproof ring is pressed into the second internal thread of the rear frame sleeve; the front end of the rear frame sleeve and the front frame sleeve form a second waterproof groove, The second waterproof trap is enclosed in the second waterproof groove.

Preferably, the front frame sleeve is provided with a dust cap at the front sleeve, the rear frame sleeve outer sleeve is provided with a locking frame, the tail part of the dust cap is provided with a third internal thread, and the front part of the locking frame is provided There is a third external thread corresponding to the third internal thread, the third external thread is screwed into the third internal thread, and the inner wall of the dust cap is pressed against the second waterproof ring.

Preferably, the tail portion of the stop ring has a first external thread, the crimp ring has a first internal thread that cooperates with the first external thread, and the first external thread is screwed into the first internal thread ; The tail portion of the front frame sleeve has a second external thread, the rear frame sleeve has a second internal thread cooperating with the second external thread, the second external thread is screwed into the second internal thread; The outdoor optical fiber connector is also provided with a connecting handle having a fixing ring at both ends, one of the fixing rings is sleeved outside the dust cap, and the other fixing ring is sleeved outside the tail sleeve.

Compared with the prior art, the present invention has the following advantages: the small white tube of the outdoor optical fiber connector of the present invention is inserted into the rear end of the ferrule assembly, the spring is sheathed outside the small white tube, and the front end of the spring bears the first of the ferrule assembly The convex ring, the stop ring is buckled and connected with the white inner core, the ferrule assembly, the spring and the small white tube are installed in the first cavity formed by the stop ring and the white inner core, and the rear end of the spring bears against the stop The first retaining ring in the ring and the ferrule assembly have a certain mobility in the first cavity, and the internal structure of the outdoor optical fiber connector of the present invention is more firm and reliable by the elastic force of the spring. The stop ring and the crimp ring can be connected by a thread, and the front frame sleeve and the rear frame sleeve are connected by a thread. The threaded connection is easy to operate, and the dustproof and waterproof effect is good. The size of the first bump and the second bump in the first mounting hole of the front frame sleeve are different, the size of the first clamping slot matches the size of the first bump, the size of the second clamping slot and the second bump The size of the first and second bumps are caught in the first slot, and the second bump is stuck in the second slot, so when the stop ring is fixed to the front frame sleeve, only when the first bump is stuck in the first Only one card slot and the second bump can be installed in the second card slot to ensure successful installation, which ensures the correct installation of the stop ring and does not rotate after the stop ring is installed. It has a good circumferential positioning effect and can prevent The internal core wire is twisted, the quality of optical fiber butt joint is high, the optical fiber is not easy to shift after docking, and the reliability is high.

BRIEF DESCRIPTION

The present invention will be further described using the drawings, but the embodiments in the drawings do not constitute any limitation to the present invention.

1 is a schematic structural diagram of a first embodiment of an outdoor optical fiber connector of the present invention;

2 is an exploded schematic view of the first embodiment of an outdoor optical fiber connector of the present invention;

3 is a schematic structural diagram of a second embodiment of an outdoor optical fiber connector of the present invention;

4 is an exploded schematic structural view of a second embodiment of an outdoor optical fiber connector of the present invention;

5 is a schematic structural view of a front frame sleeve of an outdoor optical fiber connector of the present invention;

6 is a schematic cross-sectional structural view of a front frame sleeve of an outdoor optical fiber connector of the present invention;

7 is a schematic structural diagram of a stop ring of an outdoor optical fiber connector of the present invention;

8 is a schematic cross-sectional structural view of a stop ring of an outdoor optical fiber connector of the present invention;

9 is a schematic structural view of two splints of an outdoor optical fiber connector of the present invention after assembly;

10 is an exploded schematic view of two splints of an outdoor optical fiber connector of the present invention;

11 is a schematic structural view of a splint of an outdoor optical fiber connector of the present invention;

12 is a schematic cross-sectional structure of an outdoor optical fiber connector of the present invention after assembly of two splints;

13 is a schematic cross-sectional structural view of a rear frame sleeve of an outdoor optical fiber connector of the present invention;

14 is a schematic structural view of a crimp ring of an outdoor optical fiber connector of the present invention;

15 is a schematic cross-sectional structural view of a circular tail sleeve of an outdoor optical fiber connector of the present invention;

16 is a schematic cross-sectional structural view of a flat tail sleeve of an outdoor optical fiber connector of the present invention.

detailed description

The present invention will be further described in conjunction with the following embodiments and drawings:

An outdoor optical fiber connector, as shown in FIGS. 1 to 16, for connecting an external optical cable 10, comprising: a front frame sleeve 20 having a first mounting hole 21, a white inner core 30, and a first convex ring 32 on the outer side Ferrule assembly 31, spring 33, small white tube 34, stop ring 40 with first stop ring 41 inside, crimp ring 45, fixing device 50 for fixing the outer sheath of optical cable 10, rear frame sleeve 60, tail sleeve 70; small The white tube 34 is inserted into the rear end of the ferrule assembly 31, and the spring 33 is sleeved outside the small white tube 34. The front end of the spring 33 bears against the first convex ring 32 of the ferrule assembly 31, and the stop ring 40 is engaged with the white inner core 30 Connected, the ferrule assembly 31, the spring 33 and the small white tube 34 are inserted into the first cavity formed by the snap ring 40 and the white inner core 30, and the rear end of the spring 33 bears against the first stop ring 41; A second convex ring 43 is provided on the outer side of the ring 40, and a first convex point 23 and a second convex point 24 of different sizes are provided in the first mounting hole 21 of the front frame sleeve 20. The first locking groove 431 of the convex point 23 cooperates with the second convex ring 43 is provided with a second locking groove 432 which cooperates with the second convex point 24, the stop ring 40 is locked into the first mounting hole 21, the first convex point 23 stuck in the first slot In 431, the second bump 24 is caught in the second slot 432, the crimp ring 45 is fixed to the tail of the stop ring 40, and the fixing device 50 is arranged behind the crimp ring 45; the tail and rear of the front frame cover 20 The frame sleeve 60 is screwed; the white inner core 30, the ferrule assembly 31, the spring 33, the small white tube 34, the stop ring 40, the crimp ring 45 and the fixing device 50 are formed on the front frame sleeve 20 and the rear frame sleeve 60 In the second cavity, the tail sleeve 70 is sleeved on the tail portion of the rear frame sleeve 60.

The small white tube 34 of the outdoor optical fiber connector of the present invention is inserted into the rear end of the ferrule assembly 31, the spring 33 is sleeved outside the small white tube 34, the front end of the spring 33 bears against the first convex ring 32 of the ferrule assembly 31, and stops The ring 40 is buckled and connected with the white inner core 30, the ferrule assembly 31, the spring 33 and the small white tube 34 are inserted into the first cavity formed by the snap ring 40 and the white inner core 30, and the rear end of the spring 33 is The first stop ring 41 in the stop ring 40, the first protruding ring 32 and the first stop ring 41 play a limiting role on both ends of the spring 33, and the ferrule assembly 31 has a certain mobility in the first cavity Through the elastic force of the spring 33, the internal structure of the outdoor optical fiber connector of the present invention is more firm and reliable. The stop ring 40 and the crimp ring 45 can be connected by a thread, and the front frame sleeve 20 and the rear frame sleeve 60 are connected by a thread. The threaded connection is easy to operate and has a good dustproof and waterproof effect. The size of the first bump 23 and the second bump 24 in the first mounting hole 21 of the front frame cover 20 are different. The size of the first clamping slot 431 matches the size of the first bump 23, and the second clamping slot 432 The size of the second bump 24 matches the size of the second bump 24, the first bump 23 is caught in the first slot 431, the second bump 24 is caught in the second slot 432, so the stop ring 40 is fixed in front When the frame cover 20 is installed, only when the first bump 23 is caught in the first slot 431 and the second bump 24 is caught in the second slot 432 can the installation be successful, which ensures the correct installation of the stop ring 40 and The moving ring 40 does not rotate after installation, has a good circumferential positioning effect, can prevent the internal core wire from twisting, and at the same time increases the torsion resistance of the stop ring 40 in the front frame sleeve 20, the optical fiber butt quality is high, butt joint The rear fiber is not easy to shift and has high reliability. The fixing device 50 can be set according to the type of the external optical cable 10, and can be used to fix the round optical cable when the structure is matched with the mating round optical cable; when the structure is matched with the mating flat optical cable, it can be used to fix the flat optical cable.

As an embodiment of the present invention, as shown in FIGS. 1, 2 and 15, the fixing device 50 is a fixed cylinder 51 sleeved on the tail of the crimp ring 45, and the tail sleeve 70 is a tail sleeve with a circular inner hole 70. At this time, the outdoor optical fiber connector of the present invention can be used to connect the round outdoor optical cable 10.

Preferably, as shown in FIG. 14, an aluminum ring 47 is provided outside the tail of the crimp ring 45. The fixed cylinder 51 tightly presses the Kevlar wire inside the circular optical cable 10 to the aluminum ring 47 at the rear end of the crimp ring 45 as the main tensile structure of the entire connector and the circular optical cable 10. The rear end presses the outer skin of the circular optical cable 10 to fix the circular optical cable 10. The fixed cylinder 51 crimps the Kevlar wire inside the optical cable 10 to the aluminum ring 47. Because the aluminum ring 47 is made of aluminum, it will not break after the crimping deformation, and the crimping is firm and reliable.

As a second embodiment of the present invention, as shown in FIGS. 9 to 12, the fixing device 50 includes two oppositely arranged fixed clamping plates 52, and a third clamping slot 53 and a first positioning post 54 are provided inside the clamping plate 52, wherein The first positioning post 54 of one clamping plate 52 snaps into the third clamping groove 53 of the other clamping plate 52. A first semi-circular groove 55 is provided inside the clamping plate 52, and two sides of the first semi-circular groove 55 are respectively provided with a radius greater than the first semi-circular groove 55 small second semicircular groove 56, two first semicircular grooves 55 when the two clamping plates 52 are fixed form a first circular hole 57, two sets of second semicircular grooves 56 form two second circular holes 58, the tail sleeve 70 is an inner hole Flat tail cover 70.

The fixing device 50 is composed of the same two clamping plates 52. When the two clamping plates 52 are closed, the first positioning post 54 of one clamping plate 52 snaps into the third clamping groove 53 of the other clamping plate 52. The structure can be used to connect the flat optical cable 10, the first positioning post 54 and the third clamping slot 53 cooperate, the structure is simple, and the two clamping plates 52 can be conveniently fixed; when connecting the flat optical cable 10, the two second round holes 58 are respectively Clamping the two reinforcing members of the flat optical cable 10, the first round hole 57 can clamp the reinforcing member of the center of the flat optical cable 10 and the kraft cable, the structure of the fixing device 50 matches the structure of the flat optical cable 10, and then the The flat optical cable 10 is fixed.

Preferably, as shown in FIG. 11, the first semi-circular groove 56 is provided with a first dispensing groove 59, the first dispensing groove 59 is provided with a first dispensing hole 591, and the first semi-circular groove 55 is provided with a first Two dispensing holes 592. After the two second round holes 58 clamp the reinforcing member of the optical cable 10, glue can be added from the first dispensing hole 591 to the first dispensing groove 59 to strengthen the fixing of the optical cable 10 reinforcing member by the two clamping plates 52. At the same time, the first semi-circular groove 55 also has a second dispensing hole 592, which can be dispensed through the second dispensing hole 592 to further strengthen the fixing of the reinforcing member of the optical cable 10, so that the optical cable 10 is not easy to fall off after fixing, and the optical cable 10 is fixed Can resist a certain amount of pulling force.

Preferably, as shown in FIG. 9 to FIG. 11 and FIG. 13, the fixing device 50 has a first outer circumferential surface 593 tapering toward the tail circumferential direction, and the rear frame sleeve 60 has a through hole 63 tapering toward the tail circumferential direction. Moreover, the through hole 63 of the same length is reduced by a greater extent than the first outer peripheral surface 593 is reduced. Therefore, when the optical cable 10 is pulled backward, the inner side wall of the rear frame cover 60 will press against the outer side wall of the clamping plate 52, so that the tighter the clamp is, the more reliable the structure is.

Preferably, as shown in FIGS. 1 and 3, the rear portion of the rear frame cover 60 is provided with a heat-shrinkable sleeve 64 with glue to fix the external cable. The rear portion of the rear frame sleeve 60 is heat-shrinked on the optical cable 10 and the rear frame sleeve 60 by a heat-shrinkable tube 64 with glue. At the same time, water or dust and other impurities are prevented from infiltrating through the hole at the rear end of the rear frame cover 60, so that the outdoor fiber optic connector of the present invention has better dustproof and waterproof effects.

The tail sleeve 70 is set at the rear end of the rear frame sleeve 60, and the outer diameter of the heat shrinkable sleeve 64 with heat shrinkage on the rear frame sleeve 60 is larger than the inner hole of the tail sleeve 70, so that the tail sleeve 70 can be fixed, It can also prevent the penetration of water or dust and other impurities.

Preferably, as shown in FIGS. 1 to 4, the outdoor optical fiber connector is further provided with a first waterproof ring 80 and a second waterproof ring 81, and the inner side of the second external thread 22 of the front frame sleeve 20 is provided with a first In the waterproof groove 25, the first waterproof ring 80 is sleeved in the first waterproof groove 25, and the first waterproof ring 80 is pressed in the second internal thread 61 of the rear frame sleeve 60; the front end of the rear frame sleeve 60 and the front frame sleeve 20 form a first The second waterproof groove 26 and the second waterproof ring 81 are sleeved in the second waterproof groove 26.

The first waterproof ring 80 is tightened in the first waterproof groove 25 of the front frame sleeve 20, and the rear frame sleeve 60 is locked on the second external thread 22 at the rear end of the front frame sleeve 20 through the threaded hole at the front end thereof. The 80 is pressed into the second internal thread 61 of the rear frame sleeve 60, thereby preventing other impurities such as water or dust from seeping through the gap where it is connected. The second waterproof ring 81 is tightened in the second waterproof groove 26 formed after the front frame cover 20 and the rear frame cover 60 are tightened, which can prevent water or dust and other impurities from infiltrating from above.

Preferably, as shown in FIGS. 1 to 4, the front frame cover 20 is provided with a dust cap 90 at the front, the rear frame cover 60 is provided with a locking frame 92, and the tail of the dust cap 90 is provided with a third internal thread (Not shown in the figure), the front part of the locking frame 92 is provided with a third external thread 93 corresponding to the third internal thread (not shown in the figure), and the third external thread 93 is screwed into the third internal thread (not shown in the figure) (Marked), the inner wall of the dust cap 90 is pressed against the second waterproof ring 81.

The second waterproof ring 81 is tightened in the second waterproof groove 26 formed after the front frame cover 20 and the rear frame cover 60 are tightened. When the locking frame 92 locks the dust cap 90, the inner wall of the dust cap 90 is tight Pressing tightly on the second waterproof ring 81 can prevent other impurities such as water or dust from seeping from above.

Preferably, as shown in FIGS. 1 to 4, the tail portion of the stop ring 40 has a first external thread 42, the crimp ring 45 has a first internal thread 46 that cooperates with the first external thread 42, and the first external thread 42 Screwed into the first internal thread 46; the fixing device 50 is arranged behind the crimp ring 45; the rear portion of the front frame sleeve 20 has a second external thread 22, and the rear frame sleeve 60 has a second internal thread that cooperates with the second external thread 22 Thread 61, the second external thread 22 is screwed into the second internal thread 61, the outdoor optical fiber connector is also provided with a connecting handle 94 with a fixing ring 95 at both ends, one of the fixing ring 95 is sleeved outside the dust cap 90, the other The fixing ring 95 is sleeved outside the tail sleeve 70. The stop ring 40 and the crimp ring 45 can be connected by a thread, and the front frame sleeve 20 and the rear frame sleeve 60 are connected by a thread. The threaded connection is easy to operate and has a good dustproof and waterproof effect. The fixing rings 95 at both ends of the connecting handle 94 are respectively sleeved on the dust cap 90 and the tail sleeve 70, and the dust cap 90 and the tail sleeve 70 are connected together. When the dust cap 90 is removed during use, neither the dust cap 90 nor the dust cap 90 It will fall, the locking frame 92 is sleeved outside the rear frame sleeve 60, and the fixing ring 95 of the lower connecting handle 94 is sleeved on the tail sleeve 70 to prevent the locking frame 92 from falling down, making the structure more reliable.

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention, rather than limiting the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand The technical solution of the present invention may be modified or equivalently replaced without departing from the essence and scope of the technical solution of the present invention.

Claims

An outdoor optical fiber connector for connecting an external optical cable, which is characterized by comprising: a front frame sleeve with a first mounting hole, a white inner core, a ferrule assembly with a first convex ring on the outside, a spring, a small white tube, There is a stop ring, a crimp ring, a fixing device for fixing the optical cable, a rear frame sleeve, and a tail sleeve inside the first stop ring;

The small white tube is inserted into the rear end of the ferrule assembly, the spring is sleeved outside the small white tube, the front end of the spring bears against the first convex ring of the ferrule assembly, and the stop ring Buckle-connected with the white inner core, the ferrule assembly, the spring and the small white tube are installed in a first cavity formed by buckling of the stop ring and the white inner core, the The rear end of the spring bears against the first retaining ring;

A second convex ring is provided on the outer side of the stop ring, a first convex point and a second convex point of different sizes are provided in the first mounting hole of the front frame sleeve, and the second convex ring is provided with A first snap groove that cooperates with the first bump, a second snap groove that cooperates with the second bump is provided on the second convex ring, and the stop ring snaps into the first mounting hole Inside, the first bump is caught in the first slot, and the second bump is stuck in the second slot;

The crimp ring is fixed to the tail of the stop ring, and the fixing device is arranged behind the crimp ring; the tail of the front frame sleeve is screwed to the rear frame sleeve; the white inner core , The ferrule assembly, the spring, the small white tube, the stop ring, the crimp ring and the fixing device are provided on the front frame sleeve and the rear frame sleeve formed by the first In the two cavities, the tail sleeve is sleeved on the tail portion of the rear frame sleeve.
The outdoor optical fiber connector according to claim 1, wherein the fixing device is a fixed cylinder sleeved on the tail of the crimp ring, and the tail sleeve is a round sleeve with an inner hole.
An outdoor optical fiber connector according to claim 2, wherein an aluminum ring is provided outside the tail of the crimp ring.
The outdoor optical fiber connector according to claim 1, wherein the fixing device comprises two oppositely arranged fixing splints, and a third clamping slot and a first positioning post are provided inside the splint, one of which is The first positioning post of the clamping plate is snapped into the third clamping groove of another clamping plate, a first semicircular groove is provided inside the clamping plate, and two sides of the first semicircular groove are respectively provided with a radius ratio A second semicircular groove with a small first semicircular groove, when the two clamping plates are fixed, two of the first semicircular grooves constitute a first circular hole, and two groups of the second semicircular grooves constitute two second circular holes, and the tail The sleeve is a flat tail sleeve with an inner hole.
An outdoor optical fiber connector according to claim 4, wherein a first dispensing groove is provided in the second semi-circular groove, and a first dispensing hole is provided in the first dispensing groove, so The first semi-circular groove is provided with a second dispensing hole.
An outdoor optical fiber connector according to claim 5, wherein the fixing device has a first outer circumferential surface that gradually decreases toward the tail circumferential direction, and the rear frame sleeve has a passage that gradually decreases toward the tail circumferential direction. A through hole, and the through hole of the same length shrinks more than the first outer peripheral surface.
An outdoor optical fiber connector according to claim 3 or 6, wherein a heat shrinkable tube with glue for fixing the external cable is provided at the tail of the rear frame sleeve.
An outdoor optical fiber connector according to claim 7, wherein the outdoor optical fiber connector is further provided with a first waterproof ring and a second waterproof ring, and the second external thread of the front frame sleeve A first waterproof groove is provided on the inner side, the first waterproof ring is sleeved in the first waterproof groove, and the first waterproof ring is pressed in the second internal thread of the rear frame sleeve; the rear A front end of the frame sleeve and the front frame sleeve form a second waterproof groove, and the second waterproof ring is enclosed in the second waterproof groove.
An outdoor optical fiber connector according to claim 8, wherein the front frame sleeve is provided with a dust cap on the front sleeve, the rear frame sleeve is provided with a locking frame, and the tail part of the dust cap A third internal thread is provided. A front portion of the locking frame is provided with a third external thread corresponding to the third internal thread. The third external thread is screwed into the third internal thread. The inner wall of the dust cap is pressed against the second waterproof ring.
An outdoor optical fiber connector according to claim 9, wherein the tail portion of the stop ring has a first external thread, and the crimp ring has a first internal thread that cooperates with the first external thread , The first external thread is screwed into the first internal thread; the tail of the front frame sleeve has a second external thread, and the rear frame sleeve has a second internal thread that cooperates with the second external thread, The second external thread is screwed into the second internal thread; the outdoor optical fiber connector is further provided with a connecting handle with a fixing ring at both ends, one of the fixing rings is sleeved outside the dust cap, the other The fixing ring is outside the tail sleeve.