CN110488423B

CN110488423B - Optical fiber adapter and optical fiber connector

Info

Publication number: CN110488423B
Application number: CN201810990129.XA
Authority: CN
Inventors: 杨沐晨
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-05-14
Filing date: 2018-08-28
Publication date: 2021-11-05
Anticipated expiration: 2038-08-28
Also published as: CN110488423A

Abstract

The invention relates to a fiber optic adapter. Comprises the following steps: a hollow housing; a cantilever disposed within the housing, one end of the cantilever being connected to the housing; and a first protrusion disposed on the cantilever, the protrusion being used to engage with a second protrusion on a fiber optic connector, wherein the first protrusion on the cantilever has a first surface, a second surface, a third surface, a fourth surface, a first side surface and a second side surface, the first, second, third and fourth surfaces are connected to the first and second side surfaces, the second surface is located between the first surface and the third surface, the third surface is located between the second surface and the fourth surface, the fourth surface is closer to the connection point of the cantilever and the housing than the third surface, wherein an edge R3 connecting the third surface to the second surface and the fourth surface is an edge with a rounded corner, and the radius of the rounded corner is between 0.1mm and 0.7 mm. The invention also provides an optical fiber connector.

Description

Optical fiber adapter and optical fiber connector

Technical Field

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

Background

Optical fiber has the advantages of high bandwidth and low loss, and has been widely used as a transmission medium for signals in recent years. An optical fiber connector is a mechanical device installed at the end of an optical fiber and can be used as a connecting part of an optical path when the optical fiber is connected. When the two optical fiber connectors are to be butted, the optical fiber connectors can be connected through the optical fiber adapters.

Generally, fiber optic adapters are often equipped with latches that allow the fiber optic connectors to be aligned with one another and maintain the alignment of the fiber optic connectors. Therefore, the larger the frictional force of the hook, the less likely the optical fiber connector is to slip off, but when the frictional force is large, the abrasion of the surface of the optical fiber connector is likely to be caused, and the chipping is increased.

Disclosure of Invention

In order to solve the problem that the friction force of a clamping hook is large to cause the surface abrasion of an optical fiber connector and increase the grinding, the invention provides an optical fiber adapter, which comprises: a hollow housing; a cantilever disposed within the housing, the cantilever having one end connected to the housing; and a first protrusion disposed on the cantilever, the first protrusion being adapted to engage with a second protrusion on a fiber optic connector, wherein the first protrusion on the cantilever has a first surface, a second surface, a third surface, a fourth surface, a first side surface and a second side surface, the first, second, third and fourth surfaces are connected to the first side surface, respectively, the first surface, the second surface, the third surface and the fourth surface are connected to the second side surface, the second surface is located between the first surface and the third surface, the third surface is located between the second surface and the fourth surface, the fourth surface is closer to the connection between the cantilever and the housing than the third surface, wherein an edge R3 of the third surface connecting the second surface and the fourth surface is an edge with rounded corners, and the fillet radius is between 0.1mm and 0.7 mm.

Another object of the present invention is to provide an optical fiber connector.

To achieve the above object, the optical fiber connector of the present invention comprises: an outer casing; and an inner casing, the outer casing encircles the inner casing, be formed with a second on the surface of inner casing and protruding for with the first protruding joint on the trip of a fiber optic adapter, wherein fiber optic connector's second is protruding to have a top surface, a first inclined plane and a second inclined plane, the top surface is located first inclined plane with between the second inclined plane, wherein the top surface is connected first inclined plane with the edge R4 on second inclined plane is for having the edge of fillet (round edge), and fillet radius is between 0.05mm to 0.8 mm.

The invention provides an optical fiber adapter and an optical fiber connector, when the optical fiber adapter and the optical fiber connector are plugged, the generated powder is less, and the friction force also meets the IEC standard specification.

Drawings

FIG. 1 is a perspective view of a fiber optic adapter of the present invention.

FIG. 2 is an enlarged view of a first protrusion on a hook of a fiber optic adapter of the present invention.

FIG. 3 is another enlarged view of the first protrusion on the hook of the fiber optic adapter of the present invention.

Fig. 4 shows a first protrusion on a hook of a fiber optic adapter of the present invention formed with a rounded edge R1.

Fig. 5 shows a first protrusion on a hook of a fiber optic adapter of the present invention formed with a rounded edge R2.

Fig. 6 shows a first protrusion of a hook of a fiber optic adapter according to the present invention formed with a rounded edge R3.

Fig. 7 is a perspective view of the optical fiber connector according to the present invention.

Fig. 8 is another perspective view of the optical fiber connector according to the present invention.

Fig. 9 is a perspective view of an inner housing of the optical fiber connector according to the present invention.

Fig. 10 is a diagram illustrating the mating of the fiber optic connector into a fiber optic adapter according to the present invention.

FIG. 11 is a graph of the push-in force and pull-out force required versus time for a fiber optic connector to be inserted into and removed from a fiber optic adapter of the present invention at a plurality of different speeds.

FIG. 12 is a graph of push-in force and pull-out force versus time required for a fiber optic connector to be inserted into and removed from a conventional fiber optic adapter at a variety of different speeds.

The reference numbers illustrate:

100 fiber optic adapter

110 casing

112 opening

120 trip

122 cantilever

124 first projection

210 first surface

220 second surface

230 third surface

240 fourth surface

251 first side surface

252 second side

300 optical fiber connector

310 outer casing

320 inner casing

330 optical fiber sleeve

350 second projection

351 first inclined plane

352 second inclined plane

353 top surface

R1 edge

R2 edge

R3 edge

R4 edge

Detailed Description

Referring to fig. 1, in one embodiment of a fiber optic adapter 100 according to the present invention, the MPO type fiber optic adapter includes a hollow housing 110 surrounded by a plurality of sidewalls. The housing 110 has an opening 112 for insertion of a fiber optic connector. The fiber optic adapter 100 further includes at least one pair of hooks 120 disposed in the housing 110. Each hook 120 has a cantilever arm 122 secured at one end to one of the side walls, the cantilever arm 122 extending outwardly from the housing 110 in an axial direction toward the opening 112. In addition, a first protrusion 124 is formed at the front end of each cantilever 122, and the first protrusions 124 of the two cantilevers 122 face each other. When a fiber optic connector is inserted into the fiber optic adapter 100 through the opening 112, the arms 122 flex outwardly and then spring back such that the first protrusion 124 on the arms engages the protrusion on the fiber optic connector. For clarity, other adapter assemblies are not shown.

Referring to fig. 2 and 3, each of the first protrusions 124 has a first surface 210, a second surface 220, a third surface 230, a fourth surface 240, a first side surface 251 and a second side surface 252. The first side 251 is parallel to the second side 252, and the first surface 210, the second surface 220, the third surface 230 and the fourth surface 240 are located between the first side 251 and the second side 252. The second surface 220 is located between the first surface 210 and the third surface 230, and the third surface 230 is located between the second surface 220 and the fourth surface 240. The first surface 210 and the second surface 220 face the opening 112, and the fourth surface 240 faces away from the opening 112. In addition, the second surface 220, the third surface 230 and the fourth surface 240 on one first protrusion 124 face the second surface 220, the third surface 230 and the fourth surface 240 on another first protrusion 124, respectively.

The first surface 210 is convex and has four sides, two sides of which are respectively connected to the first side 251 and the second side 252, and another side of which is connected to the second surface 220.

The second surface 220 is concave and has four sides, two sides of which are respectively connected to the first side 251 and the second side 252, and the other two sides of which are respectively connected to the first surface 210 and the third surface 230.

The third surface 230 is concave and has four sides, two sides of which are respectively connected to the first side 251 and the second side 252, and the other two sides of which are respectively connected to the second surface 220 and the fourth surface 240.

The fourth surface 240 is concave and has four sides, two sides of which are respectively connected to the first side 251 and the second side 252, and another side of which is connected to the third surface 230.

The first surface 210 and the second surface 220 are closer to the opening 112 than the third surface 230, and the third surface 230 is closer to the opening 112 than the fourth surface 240. The fourth surface 240 is closer to the junction of the cantilever 122 and the housing 110 than the third surface 230.

Referring to fig. 4, in the fiber optic adapter 100 according to the present invention, the edges of the first surface 210, the second surface 220, the third surface 230 and the fourth surface 240 connecting the first side 251 and the second side 252 are not sharp edges, but are rounded edges (rounded edges) R1 (shown by thick black lines), and the radius of the rounded edges is between 0.1mm and 0.7mm, preferably 0.4 mm.

Referring to fig. 5, the junction between the first surface 210 and the second surface 220 of the fiber optic adapter 100 is not a sharp edge, but is formed with a rounded edge R2 (shown by a thick black line) having a radius of 0.3mm to 0.9mm, preferably 0.6 mm.

Referring to fig. 6, the junction between the third surface 230 and the second and

fourth surfaces

220 and 240 of the fiber optic adapter 100 is formed with a rounded edge R3 (shown by a thick black line) having a radius of 0.1mm to 0.7mm, preferably 0.4 mm.

Referring to fig. 7 and 8, an optical fiber connector 300, such as an MPO type optical fiber connector, of the present invention includes a hollow outer housing 310, a hollow inner housing 320, and a fiber ferrule 330. The outer housing 310 surrounds the inner housing 320, and the fiber ferrule 330 extends from an opening at the front end of the inner housing 320. In addition, a second protrusion 350 is formed on each of two opposite sidewalls of the inner housing 320. For clarity, other connector assemblies are not shown.

Referring to fig. 9, each of the second protrusions 350 has a top surface 353, a first inclined surface 351 and a second inclined surface 352. The top surface 353 is substantially rectangular and is located between the first inclined surface 351 and the second inclined surface 352. Two edges of the top surface 353 respectively connect the first inclined surface 351 and the second inclined surface 352, and a rounded edge R4 (shown by a thick black line in the figure) is formed at the joint of the first inclined surface 351 and the second inclined surface 352, and the rounded radius of the rounded edge R4 is between 0.05mm and 0.8mm, and is preferably 0.5 mm.

Referring to fig. 10, when the optical fiber connector 300 is inserted into the optical fiber adapter 100 from the opening 112, the two cantilever arms 122 are gradually bent outward, and the first protrusions 124 of the two cantilever arms 122 slide on the two second protrusions 350, respectively. When the optical fiber connector 300 is continuously inserted, the second surface 220 of the first protrusion 124 contacts the first inclined surface 351 of the second protrusion 350, and then the third surface 230 slides on the top surface 353 of the second protrusion 350. The outwardly bent cantilever 122 will then gradually spring back and the fourth surface 240 on the first protrusion 124 will slide over the second ramp 352 on the second protrusion 350. Fig. 10 shows the fiber optic connector 300 inserted into the fiber optic adapter 100, wherein the fiber optic ferrule 330 of the fiber optic connector 300 is not shown for clarity.

When the optical fiber connector 300 is pulled out from the optical fiber adapter 100, the two cantilever arms 122 will gradually bend outward, and the first protrusions 124 on the two cantilever arms 122 will slide on the two second protrusions 350, respectively. As the fiber optic connector 300 is continuously pulled out, the fourth surface 240 on the first protrusion 124 contacts the second ramp 352 on the second protrusion 350, and the third surface 230 slides over the top surface 353 of the second protrusion 350. The outwardly bent cantilever 122 then gradually springs back and the second surface 220 on the first protrusion 124 slides over the first inclined surface 351 on the second protrusion 350.

To verify the advantages of the optical fiber adapter 100 of the present invention, please refer to fig. 11 and 12, in which fig. 11 shows the push-in force and the pull-out force required for inserting and pulling out an optical fiber connector 100 at different speeds when the parameters R1, R2, and R3 of the first protrusion 124 on the hook 120 of the optical fiber adapter 100 are 0.4mm, 0.6mm, and 0.4mm, respectively. Referring to fig. 11, when the speed of inserting and extracting the fiber connector is fast (2mm/sec), the dynamic friction force is small and is close to the lower friction force limit (2.9N) specified by iec (international electrical commission) standard; on the other hand, when the speed of inserting and removing the optical fiber connector is slow (1mm/sec), the kinetic friction force becomes large and approaches the upper limit (6.9N) of the friction force of the IEC standard specification. At different speeds, the push-in force varied by about 1.1N, while the pull-out force varied by about 1.9N.

Referring to fig. 12, it shows the push-in force and the pull-out force required by a fiber optic connector to insert and pull out the fiber optic adapter at different speeds when the corresponding parameters R1, R2, and R3 of the protrusions on the hooks of the fiber optic adapter are 0, 0.1mm, and 0, respectively. The friction force during insertion and removal of the fiber optic connector is large, and the variation of the push-in force is about 0.5N and the variation of the pull-out force is about 1N at different speeds. Comparing fig. 11 and 12, it can be seen that when a fiber optic connector is inserted into or removed from the fiber optic adapter 100 of the present invention, less friction is encountered.

Referring to the following table, when the optical fiber connector 300 of the present invention (the parameter R4 of the second protrusion 350 on the inner housing 320 is 0.1mm) is inserted into the optical fiber adapter 100 of the present invention (the parameters R1, R2 and R3 of the first protrusion 124 on the hook 120 are 0.4mm, 0.6mm and 0.4mm, respectively) and the optical fiber adapter (the corresponding parameters R1, R2 and R3 of the protrusions on the hook are 0, 0.1mm and 0, respectively) for a plurality of times, the amount of the dust (particulate) dropped from the front end surface of the optical fiber sleeve 330 of the optical fiber connector 300 is counted. As can be seen from the data in the table, the fiber optic connector of the present invention has a significantly smaller amount of dust falling off regardless of the material used for the hook of the fiber optic adapter.

Generally, the frictional force is desirably large because it is not likely to slip when an external axial tension is applied (when the speed of the axial load tension is very slow), and thus the wire is prevented from being inadvertently pulled off. The external axial tension is used to verify that the hooks of the fiber optic adapter have sufficient friction. However, the friction force is high and has a relative disadvantage: the dusting caused by surface abrasion also increases. Therefore, the best mode is as follows: when the optical fiber connector is plugged and pulled fast (the optical fiber connector is in a normal use state), the required friction force is small; and when the speed is slow (in use with axial load), the friction force required is large.

The friction force of the clamping hook of the optical fiber adapter is close to the upper limit of the specification, and the problem of chip falling is caused. If the frictional force of the hook is designed to approach the lower specification limit, there is a risk that the optical fiber connector may easily slip.

According to the optical fiber adapter and the optical fiber connector provided by the invention, when the optical fiber adapter and the optical fiber connector are plugged with the corresponding optical fiber connector or the optical fiber adapter, the generated powder is less, and the friction force also meets the IEC standard. More importantly, the fiber adapter and the fiber connector provided by the invention are manufactured without using special materials, so that the manufacturing cost is not increased.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A fiber optic adapter for insertion of a fiber optic connector having a second protrusion formed thereon, comprising:

a hollow housing;

a cantilever disposed within the housing, one end of the cantilever being connected to the housing; and the number of the first and second groups,

a first protrusion disposed on the cantilever, the first protrusion being for engaging with a second protrusion on the fiber optic connector, wherein the first protrusion has a first surface, a second surface, a third surface, a fourth surface, a first side surface and a second side surface, the first surface, the second surface, the third surface and the fourth surface are respectively connected to the first side surface, the first surface, the second surface, the third surface and the fourth surface are respectively connected to the second side surface, the second surface is located between the first surface and the third surface, the third surface is located between the second surface and the fourth surface, the fourth surface is closer to a connection between the cantilever and the housing than the third surface, and an edge R3 connecting the third surface to the second surface and the fourth surface is an edge with rounded corners, and the edge R3 has a fillet radius of 0.1mm to 0.7mm, the edge R2 of the first surface connecting the second surface is an edge with a fillet, and the fillet radius of the edge R2 is 0.3mm to 0.9mm, the edge R1 of the first surface, the second surface, the third surface and the fourth surface connecting the first side face and the second side face is an edge with a fillet, and the fillet radius of the edge R1 is 0.1mm to 0.7 mm.

2. The fiber optic adapter of claim 1, wherein an edge R3 of the third surface connecting the second and fourth surfaces has a fillet radius of 0.4 mm.

3. The fiber optic adapter of claim 1, wherein an edge R2 where the first surface connects the second surface has a fillet radius of 0.6 mm.

4. The fiber optic adapter of claim 1, wherein an edge R1 connecting the first, second, third, and fourth surfaces has a fillet radius of 0.4 mm.

5. The fiber optic adapter of claim 1, wherein the fiber optic adapter is an MPO-type fiber optic adapter.