WO2020133981A1

WO2020133981A1 - Optical fiber connecting head, optical fiber adaptor and optical fiber connector

Info

Publication number: WO2020133981A1
Application number: PCT/CN2019/093165
Authority: WO
Inventors: 徐庆; 罗科杰; 王国伟
Original assignee: 浙江超前通信科技股份有限公司
Priority date: 2018-12-28
Filing date: 2019-06-27
Publication date: 2020-07-02
Also published as: CN109521532A; CN109521532B

Abstract

The present invention discloses an optical fiber connecting head, comprising an optical fiber and a housing. The optical fiber is butt-jointed to the optical fiber adapter by the housing which is a concave outer sheath element; an optical fiber through hole is formed in a concave inner cavity at the housing bottom; a ring-shaped elastic sealing layer with the through hole at the center is formed on the housing bottom; an internal connecting thread is formed on the side wall of the concave inner cavity. Further disclosed is an optical fiber adaptor for the optical fiber connecting head. The optical fiber adaptor comprises a barrel-shaped body; one end of the barrel-shaped body is a convex end adapted to the diameter of the concave outer sheath element for butt-joint; an external thread is formed on the outer side wall of the convex end; the external thread is adaptive to the inner thread on the side wall of the concave inner cavity; the convex end and the opposite end of the barrel-shaped body is each provided with a slot adaptive to a plugging core component; a ring-shaped protruded sealing ring wall is formed on the top surface of the convex end, the diameter of the sealing ring wall corresponding to the width and position of the sealing ring of the outer sheath element. The external thread can rotate together with the internal thread in a matching manner to make the sealing ring wall extrude on the sealing ring.

Description

Optical fiber connector, optical fiber adapter and optical fiber connector

Technical field

The invention relates to the field of data communication equipment, in particular to an optical fiber connector, optical fiber adapter and optical fiber connector.

Background technique

Both ends of the fiber adapter can be inserted into fiber connectors of different interface types to achieve conversion between different interfaces such as FC, SC, ST, LC, MTRJ, MPO, E2000, etc., and are widely used in optical fiber distribution frames (ODF), optical fiber communication equipment, Instruments, etc., excellent performance, stable and reliable. Patent CN107656339A discloses an optical fiber adapter. The optical fiber adapter 200 includes an adapter dust cap 230. An end of the adapter dust cap 230 is provided with an adapter accommodating cavity for accommodating the optical fiber adapter 200. The accommodating cavity is used for The optical fiber adapter 200 is inserted into the dust cap 230 to accommodate the socket 201.

When the optical fiber connector 100 is inserted into the optical fiber adapter 200, the trumpet-shaped opening of the sleeve on the inner sleeve member 140 is aligned with the positioning key 2014 on the slot, and the inner sleeve member 140 is inserted The slot 2012 allows the ferrule 150 to be inserted into the cavity 2011, the locking point 1304 of the optical fiber connector slides into the sliding slot 2015 of the optical fiber adapter, and the optical fiber socket 201 is rotated to make the lock The tight point 1304 is slid to the end of the sliding groove 2015 to achieve locking. Through the above technical solution, the optical fiber connector is seamlessly connected to the C-shaped slot of the optical fiber adapter through the sleeve with the C-shaped opening of the optical fiber connector, and the blind insertion of the foregoing optical fiber connector is realized, and the operation is more convenient, and Can realize the plug and play of the optical fiber connector, and also has better waterproof performance.

The above solution achieves the function of inserting the optical fiber connector 100 into the optical fiber adapter through the dual connection relationship between the C-shaped open sleeve and the C-shaped slot, the locking point 1304 of the optical fiber connector and the sliding groove 2015 of the optical fiber adapter. It is more complicated from a structural point of view. The optical fiber connector and the optical fiber adapter are relatively fixed by locking points, slide grooves and sealing rings. The contact point of the locking point and the sliding groove of this fixing method is limited. The optical fiber connector and the optical fiber adapter The gap between them is completely sealed by the sealing ring, which results in the gap between the optical fiber connector and the optical fiber adapter being too large, the processing technology is not up to the standard, or the aging of the sealing ring performance has an effect on the sealing effect. Moreover, the sealing ring is only an elastic material, and the radial position between the optical fiber connector and the optical fiber adapter cannot be limited, and the relative sway also affects the sealing performance.

Summary of the invention

In order to solve the above technical problems, the present invention provides an optical fiber connector, an optical fiber adapter and an optical fiber connector with simpler connection and better sealing effect.

The present invention adopts the following technical solutions:

In a first aspect, an optical fiber connector 10 includes an optical fiber 20 and a housing. The housing connects the optical fiber to an optical fiber adapter.

The housing is a concave outer casing element 11, the bottom shell of the concave inner cavity is provided with a fiber-optic hole 11a, and the bottom shell is provided with a ring-shaped elastic sealing layer centered on the line hole; on the side wall of the concave inner cavity With connecting internal thread.

Further, the bottom shell of the concave inner cavity is provided with an annular groove centered on the through hole, and an elastic sealing ring 12 is provided in the annular groove.

Further, a convex dust cap 13 is also included. The diameter of the dust cap 13 is adapted to the diameter of the concave outer cover element 11 so that the convex dust cap 13 fits within the concave outer cover element 11 and the convex butt portion The side wall is provided with an external thread 13a, and the external thread 13a is adapted to the internal thread of the concave inner cavity side wall; the bottom of the convex dust cap 13 is also provided with a seal ring wall extending toward the inner cavity, the seal ring wall The diameter corresponds to the sealing ring 12 of the outer casing element 11. When the external thread 13a rotates in cooperation with the internal thread of the concave inner cavity side wall, the sealing ring wall is pressed against the sealing ring 12.

Further, the ring width of the sealing ring wall is smaller than the ring width of the sealing ring 12.

Further, the outer shell of the outer cover element 11 is provided with a connecting lanyard 14, and the connecting lanyard 14 is connected to the convex dust cap 13.

Further, the bottom shell of the concave inner cavity extends vertically along the wire hole to the concave inner cavity to form a ring wall, and the wire hole in the ring wall butts with the ferrule assembly 40 and fixes its position.

Further, it also includes a tail sleeve 16, a heat shrinkable tube 15 with glue, the inside of the heat shrinkable tube 15 is sealed and fixed with the optical fiber 20, and the outer end of the heat shrinkable tube 15 is fixed on the jacket element 11, The other end is sleeved with the tail sleeve 16.

In a second aspect, the present invention also provides an optical fiber adapter 30, characterized in that it includes:

A cylindrical body 31, one end of the cylindrical body is a convex end 31a adapted to butt with the diameter of the concave outer sheath element 11 of the optical fiber connector 10, the outer wall of the convex end 31a forms an external thread 31b, the external thread 31b and the optical fiber The female thread of the inner wall of the concave cavity of the connector 10 is adapted; the convex end and the opposite end of the cylindrical body are provided with slots for adapting the ferrule assembly 40; the top surface of the convex end 31a is also provided with a ring A raised sealing ring wall whose diameter corresponds to the ring width and position of the sealing ring 12 of the optical fiber connector jacket element 11 when the external thread 31b rotates in coordination with the internal thread of the concave cavity side wall of the optical fiber connector 10 The sealing ring wall is pressed against the sealing ring 12.

Further, the optical fiber adapter 30 further includes a concave dust cap 32, the diameter of the dust cap 32 is adapted to the diameter of the convex end 31a, so that the concave dust cap 32 is sleeved on the convex end 31a, and the concave shape The inner wall of the inner wall of the dust cap 32 is provided with internal threads, which are adapted to the external threads 31b; the bottom of the dust cap 32 is provided with an annular groove, and an elastic sealing ring 32a is provided in the annular groove when the concave shape The internal thread of the dust cap 32 and the external thread 31b are rotationally matched so that the top seal ring wall of the convex end 31a is pressed against the dust cap seal ring 32a.

In a third aspect, the present invention also provides an optical fiber connector, including an optical fiber connector 10, an optical fiber 20, an optical fiber adapter 30, and a ferrule assembly 40), the ferrule assembly 40 is inserted between the optical fiber connector 10 and the optical fiber adapter 30 , The optical fiber 20 is connected to the ferrule assembly 40 through the optical fiber connector 10, characterized in that

One end of the cylindrical body 31 of the optical fiber adapter 30 is a convex end 31a, and the convex end 31a is adapted to the diameter of the inner cavity of the concave sheath element 11 of the optical fiber connector 10. The outer wall of the convex end 31a forms an external thread 31b. The external thread 31b is adapted to the internal thread of the side wall of the concave cavity of the optical fiber connector 10;

The convex end 31a and the opposite end of the cylindrical body are respectively provided with slots for adapting the ferrule assembly 40;

The top surface of the convex end 31a is also provided with a ring-shaped convex sealing ring wall. The ring width and position of the sealing ring wall correspond to the ring width and position of the optical fiber connector 10 outer cover member 11 sealing ring 12 when the external thread 31b and the optical fiber The internal threads of the concave inner cavity side wall of the connecting head 10 cooperate to rotate and squeeze the seal ring wall against the seal ring 12.

Compared with the prior art, the technical advantages of the present invention are:

1. Between the optical fiber connector and the optical fiber adapter, the optical fiber connector and the dust cap, the optical fiber adapter and the dust cap are all threaded, and the top surface between the two pairs is provided with a sealing ring wall and an elastic sealing ring Correspondingly fit, so that after the thread is tightened, the sealing ring wall and the elastic sealing ring are correspondingly sealed and fitted. Moreover, the screwing pressure of the screw thread makes the sealing effect of the sealing ring wall and the elastic sealing ring better, and the sealing performance is high.

2. Due to the thread connection between the fiber connector and the fiber adapter, the fiber connector and the dust cap, and the fiber adapter and the dust cap, installation and disassembly are very convenient, labor-saving and time-saving.

BRIEF DESCRIPTION

FIG. 1 is an exploded view of the optical fiber connector of the present invention.

2 is a schematic structural view of the optical fiber connector of the present invention.

3 is a schematic structural view of the optical fiber connector of the present invention.

4 is a schematic structural diagram of the optical fiber adapter of the present invention.

Figure 5 is an exploded view of the fiber optic adapter of the present invention.

6 is a cross-sectional view of the optical fiber adapter of the present invention.

In the picture, 10-fiber connector, 11-concave jacket element, 11a-fiber cable hole, 12-seal ring, 13-convex dust cap, 13a-external thread, 14-connection lanyard, 15-band Rubber heat shrinkable sleeve, 16-tail sleeve, 20-fiber, 30-fiber adapter, 31-barrel body, 31a-male end, 31b-male thread, 32-concave dust cap, 32a-seal ring, 33-nut, 34-connect lanyard, 40-ferrule assembly.

detailed description

The technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Between the optical fiber connector and the optical fiber adapter provided in the embodiments of the present invention, the optical fiber connector and the dust cap are all threaded between the optical fiber adapter and the dust cap, and the top surface between the two pairs is provided with a seal ring wall Correspondingly cooperates with the elastic sealing ring, so that after the screw thread is tightened, the sealing ring wall and the elastic sealing ring are just in sealing fit, and the screw tightening pressure makes the sealing ring wall and the elastic sealing ring have a better sealing effect.

Referring to FIGS. 1 and 2, the present invention provides an optical fiber connector, including an optical fiber connector 10, an optical fiber 20, an optical fiber adapter 30, and a ferrule assembly 40. The ferrule assembly 40 is inserted into the optical fiber connector 10 and the optical fiber adapter 30 In the meantime, the optical fiber 20 is connected to the ferrule assembly 40 through the optical fiber connector 10).

One end of the cylindrical body 31 of the optical fiber adapter 30 is a convex end 31a, and the convex end 31a is adapted to the diameter of the inner cavity of the concave sheath element 11 of the optical fiber connector 10. The outer wall of the convex end 31a forms an external thread 31b. The external thread 31b is adapted to the internal thread of the concave inner cavity side wall of the optical fiber connector 10; the convex end 31a and the opposite end of the cylindrical body are each provided with a slot for adapting the ferrule assembly 40; the convex end 31a The top surface is also provided with an annular convex sealing ring wall, the ring width and position of the sealing ring wall correspond to the ring width and position of the sealing ring 12 of the optical fiber connector jacket element 11, when the external thread 31b is concave with the optical fiber connector (10) The internal threads of the side wall of the inner cavity cooperate to rotate and squeeze the seal ring wall against the seal ring 12. The above structure makes the optical fiber connector and the optical fiber adapter screw tight, the sealing ring wall and the elastic sealing ring on the interface between the optical fiber connector and the optical fiber adapter are pressed, and the screw tightening makes the distance between the two closer and the sealing ring wall squeezed The greater the pressure, the better the sealing effect of the seal ring wall and the elastic seal ring.

A single optical fiber connector (10) structure, as shown in FIGS. 1 and 3, includes an optical fiber 20, a concave jacket element 11, a sealing ring 12, a connection lanyard 14, a convex dust cap 13, a tail sleeve 16, A heat shrinkable tube 15 with glue, a lanyard 14 is provided on the outer shell of the outer cover element 11, and a convex dust cap 13 is connected with the lanyard 14, the heat shrinkable tube 15 with glue is sealed and fixed with the optical fiber 20, and One end of the rubber heat shrinkable sleeve 15 is fixed on the outer sleeve element 11 and the other end is sleeved with the tail sleeve 16. The bottom shell of the concave outer casing element 11 extends vertically along the thread hole to the concave inner cavity to form a ring wall, and the thread hole in the ring wall butts with the ferrule assembly 40 and fixes its position.

The inner wall of the concave outer casing element 11 is provided with a connecting internal thread, and the bottom shell of the inner cavity is provided with an optical fiber passing hole 11a, and the bottom shell is provided with a circular groove centered on the passing hole. Set the elastic seal ring 12.

The dust cap 13 has a convex shape, and the diameter of the dust cap 13 is adapted to the diameter of the concave outer cover element 11, so that the convex dust cap 13 is fitted in the concave outer cover element 11, and the side wall of the convex butt portion is provided External thread 13a, the external thread 13a is adapted to the internal thread of the side wall of the concave inner cavity; the bottom of the convex dust cap 13 is also provided with a seal ring wall extending toward the inner cavity, the ring width and position of the seal ring wall Corresponding to the sealing ring 12 of the outer covering element, when the external thread 13a rotates in cooperation with the internal thread of the concave cavity side wall, the sealing ring wall is pressed against the sealing ring 12. The function of the dust cap is to cover the dust cap when the connector is not in use to ensure a clean environment. The dust cap of this structure is easy to install with the connector, and the sealing effect is good.

To further improve the sealing effect, the ring width of the seal ring wall is smaller than the ring width of the seal ring 12, and an arc-shaped protrusion is formed on the contact surface of the seal ring wall and the seal ring 12, or

The shape of the ribs, arc-shaped protrusions, or ribs can be inserted deeper into the seal ring, so that the seal ring wall and the seal ring 12 are more tightly combined, and the waterproof effect is better.

An optical fiber adapter (30), as shown in FIGS. 4-6, includes a cylindrical body 31, and one end of the cylindrical body is a convex end 31a adapted to butt with a diameter of a concave outer sheath element 11 of an optical fiber connector 10, the An outer thread 31b is formed on the outer wall of the convex end 31a, and the outer thread 31b is adapted to the inner thread of the concave inner cavity side wall of the optical fiber connector 10; the convex end and the opposite end of the cylindrical body are each provided with an adapting ferrule assembly 40 slot; the top surface of the convex end 31a is also provided with a ring-shaped raised sealing ring wall, the diameter of the sealing ring wall corresponds to the optical fiber connector 10 outer cover member 11 sealing ring 12 ring width, position corresponding to the external thread 31b rotates in cooperation with the internal thread of the concave inner cavity side wall of the optical fiber connector 10 and squeezes the seal ring wall on the seal ring 12.

In addition, a concave dust cap 32 is also included. The diameter of the dust cap 32 is adapted to the diameter of the convex end 31a, so that the concave dust cap 32 is fitted on the convex end 31a, and the concave dust cap 32 The side wall of the inner cavity is provided with an internal thread, and the internal thread is adapted to the external thread 31b; the bottom groove of the dust cap 32 is provided with an elastic seal ring. When the internal thread of the concave dust cap 32 is The external thread 31b is rotationally adapted so that the top seal ring wall of the male end 31a is pressed against the dust cap 32 seal ring. One end of the connecting lanyard 34 is sleeved on the concave dust cap 32, and the other end is sleeved between the cylindrical body 31 and the nut 33. The role of the dust cap is to cover the adapter port when not in use to ensure a clean environment. The dust cap and adapter of this structure are easy to install and have a good sealing effect.

The above are only preferred embodiments of the present invention, and the protection scope of the present invention is subject to the scope defined by the claims. A number of improvements and retouchings made by those skilled in the art without departing from the spirit and scope of the present invention should also be regarded as This is the protection scope of the present invention.

Claims

An optical fiber connector (10) includes an optical fiber (20) and a housing. The housing connects the optical fiber to the optical fiber adapter.

The shell is a concave outer cover element (11), the bottom shell of the concave inner cavity is provided with an optical fiber passing hole (11a), and the bottom shell is provided with a ring-shaped elastic sealing layer centered on the passing hole;

The concave inner cavity side wall is provided with a connecting internal thread.
The optical fiber connector according to claim 1, wherein the concave inner cavity bottom shell is provided with an annular groove centered on the through hole, and an elastic sealing ring (12) is provided in the annular groove.
The optical fiber connector according to claim 2, further comprising a convex dust cap (13), the diameter of the dust cap (13) is matched with the diameter of the concave outer sheath element (11) to make the convex shape The dust cap (13) is sleeved in the concave outer casing element (11), and the side wall of the convex butt portion is provided with an external thread (13a), which is adapted to the internal thread of the side wall of the concave cavity ;

The bottom of the convex dust cap (13) is also provided with a sealing ring wall extending toward the inner cavity, the ring width and position of the sealing ring wall correspond to the sealing ring (12) of the outer casing element (11), when the external thread (13a) ) Cooperate with the internal thread of the concave cavity side wall to rotate the sealing ring wall against the sealing ring (12).
The optical fiber connector according to claim 3, wherein the ring width of the sealing ring wall is smaller than the ring width of the sealing ring (12).
The optical fiber connector according to claim 3, characterized in that the outer shell (11) is provided with a connecting lanyard (14) on the outer shell, and the connecting lanyard (14) is connected to the convex dust cap (13).
The optical fiber connector according to claim 1, wherein the bottom shell of the concave inner cavity extends vertically along the wire hole to the concave inner cavity to form a ring wall, and the wire hole in the ring wall and the ferrule assembly (40) Docking and fixing its position.
The optical fiber connector according to claim 1, further comprising a tail sleeve (16), a heat shrinkable tube with glue (15), the heat shrinkable tube (15) with glue and the optical fiber (20) inside It is sealed and fixed, and the outer end of the heat-shrinkable tube with glue (15) is fixed on the outer casing element (11), and the other end is sleeved with the tail sleeve (16).
An optical fiber adapter (30), characterized in that it includes:

A cylindrical body (31), one end of the cylindrical body is a convex end (31a) adapted to butt with the diameter of the concave outer sheath element (11) of the optical fiber connector (10), the outer wall of the convex end (31a) is formed External thread (31b), the external thread (31b) is adapted to the internal thread on the side wall of the concave cavity of the optical fiber connector (10);

The convex end and the opposite end of the cylindrical body are respectively provided with slots for adapting the ferrule assembly (40);

The top surface of the convex end (31a) is also provided with a ring-shaped convex sealing ring wall, the diameter of the sealing ring wall corresponds to the ring width and position of the sealing ring (12) of the optical fiber connector jacket element (11), and is external The screw thread (31b) rotates in cooperation with the inner screw thread of the concave inner cavity side wall of the optical fiber connector (10) and squeezes the seal ring wall on the seal ring (12).
The optical fiber adapter according to claim 8, further comprising a concave dust cap (32), the diameter of the dust cap (32) is adapted to the diameter of the convex end (31a), so that the concave The dust cap (32) is sleeved on the convex end (31a), and the side wall of the inner cavity of the concave dust cap (32) is provided with an internal thread, and the internal thread is adapted to the external thread (31b);

The bottom of the dust cap (32) is provided with an annular groove, and an elastic seal ring (32a) is provided in the annular groove. When the internal thread of the concave dust cap (32) and the external thread (31b) are rotated and matched, the convex shape The top seal ring wall of the end (31a) is pressed against the dust cap seal ring (32a).
An optical fiber connector includes an optical fiber connector (10), an optical fiber (20), an optical fiber adapter (30), a ferrule assembly (40), the ferrule assembly (40) is plugged into the optical fiber connector (10), an optical fiber adapter Between (30), the optical fiber (20) is connected to the ferrule assembly (40) through the optical fiber connector (10), characterized in that:

One end of the cylindrical body (31) of the optical fiber adapter (30) is a convex end (31a), and the convex end (31a) is adapted to the diameter of the inner cavity of the concave sheath element (11) of the optical fiber connector (10). An external thread (31b) is formed on the outer side wall of the convex end (31a), and the external thread (31b) is adapted to the internal thread of the side wall of the concave cavity of the optical fiber connector (10);

The convex end (31a) and the opposite end of the cylindrical body are respectively provided with slots for adapting the ferrule assembly (40);

The top surface of the convex end (31a) is also provided with a ring-shaped convex sealing ring wall, the ring width and position of the sealing ring wall are similar to the ring width and position of the optical fiber connector (10) jacket element (11) sealing ring (12) Correspondingly, when the external thread (31b) cooperates with the internal thread on the side wall of the concave cavity of the optical fiber connector (10), the sealing ring wall is pressed against the sealing ring (12).