Fiber optic cable anchoring device for use with fiber optic connectors and methods of using the same
10444443 ยท 2019-10-15
Assignee
Inventors
Cpc classification
G02B6/3889
PHYSICS
G02B6/3871
PHYSICS
G02B6/387
PHYSICS
International classification
Abstract
A fiber-optic connector housing (50) and cable (20, 20) are attached together by an anchor (100, 200). The anchor includes a one-piece main body, a passage (110, 210), and an injection port (130, 230). The passage extends between first (102, 202) and second ends (104, 204) of the anchor. Strength members (40, 40) of the cable are secured within the passage by a bonding material (90) and are thereby anchored to the connector housing. A proximal end (54) of the connector housing includes first (60) and second housing components (70) which capture the anchor. The passage passes through an optical fiber (30) of the cable. The passage includes first (120, 220), second (170, 270), and third portions (180, 280). The first portion radially positions the optical fiber. The second portion receives the bonding material and the strength members. The third portion receives a jacket (26, 26) of the fiber optic cable. The injection port delivers the bonding material to the passage. The anchor may further include retention tabs (150) that fit within corresponding receivers (62, 72) within the connector.
Claims
1. A fiber optic connector and cable assembly comprising: a fiber optic cable including an optical fiber, a jacket surrounding the optical fiber, and at least one strength member for providing the fiber optic cable with axial reinforcement; a connector housing including a housing first end positioned opposite from a housing second end, the housing first end defining a plug portion adapted for insertion in a fiber optic adapter and the housing second end internally receiving the at least one strength member and the optical fiber of the fiber optic cable; a ferrule positioned at the housing first end of the connector housing, the ferrule receiving an end portion of the optical fiber, the ferrule defining an axis that extends through the connector housing from the housing first end to the housing second end of the connector housing; and an anchor extending between a first end and a second end, the anchor retained within the connector housing, the housing second end of the connector housing including first and second housing components between which the anchor is captured, the anchor including a passage extending between the first end and the second end of the anchor, a bonding material adhering the at least one strength member within the passage of the anchor such that the anchor anchors the at least one strength member to the connector housing, and the at least one strength member being adapted such that it can be secured to the anchor prior to retaining the anchor within the connector housing; wherein the bonding material directly contacts and adheres the optical fiber within the passage of the anchor.
2. The fiber optic connector and cable assembly of claim 1, wherein the bonding material is an epoxy.
3. The fiber optic connector and cable assembly of claim 1, wherein the at least one strength member includes a plurality of reinforcing yarns.
4. The fiber optic connector and cable assembly of claim 1, wherein the anchor includes at least one retention tab that fits within a corresponding receiver provided on the connector housing.
5. The fiber optic connector and cable assembly of claim 1, wherein the anchor is positioned between at least the first and second components of the connector housing that are secured together during assembly of the connector housing.
6. The fiber optic connector and cable assembly of claim 1, wherein the anchor is fixed in position relative to the connector housing along the axis that extends through the connector housing.
7. The fiber optic connector and cable assembly of claim 6, wherein the anchor includes at least one anchor tab that engages at least one corresponding retaining receiver of the connector housing and is thereby fixed in position relative to the connector housing along the axis that extends through the connector housing.
8. The fiber optic connector and cable assembly of claim 1, further comprising a spring for biasing the ferrule in a direction that extends outwardly from the housing first end of the connector housing along the axis of the ferrule.
9. The fiber optic connector and cable assembly of claim 1, wherein the first housing component of the connector housing is a one-piece main body that defines the plug portion of the connector housing, wherein the one-piece main body also includes a proximal extension that projects outwardly from the plug portion, and wherein the second housing component of the connector housing is a cover piece that mounts to the proximal extension.
10. The fiber optic connector and cable assembly of claim 9, wherein an attachment portion of the anchor is positioned between the proximal extension and the cover piece and wherein the attachment portion includes a plurality of retention tabs that fit within corresponding receivers defined by the connector housing.
11. The fiber optic connector and cable assembly of claim 10, wherein the proximal extension includes a first receiver of the corresponding receivers that receives a first retention tab of the plurality of retention tabs and wherein the cover piece includes a second receiver of the corresponding receivers that receives a second retention tab of the plurality of retention tabs.
12. The fiber optic connector and cable assembly of claim 1, wherein a tube is positioned around a portion of the optical fiber within the passage of the anchor.
13. The fiber optic connector and cable assembly of claim 12, wherein the tube is positioned between the portion of the optical fiber and the bonding material.
14. The fiber optic connector and cable assembly of claim 1, further comprising a shrink tube positioned around a portion of the jacket and the second end of the anchor.
15. The fiber optic connector and cable assembly of claim 1, wherein the passage of the anchor includes a necked-down portion adjacent the first end of the anchor.
16. The fiber optic connector and cable assembly of claim 1, wherein the anchor includes an injection port adapted to deliver the bonding material to the passage of the anchor.
17. An anchor for anchoring a fiber optic cable within a fiber optic connector, the anchor comprising: a main body extending between a first end and an opposite second end; a passage extending between the first end and the second end of the anchor, the passage adapted to pass through an optical fiber of the fiber optic cable, the passage including: a first portion radially positioning the optical fiber of the fiber optic cable within the passage; and a second portion containing at least one strength member of the fiber optic cable; and an injection port adapted to deliver a bonding material to the passage of the anchor; wherein the bonding material directly contacts and adheres the optical fiber and the at least one strength member within the passage of the anchor; and wherein the anchor is separate from a connector housing of the fiber optic connector.
18. The anchor of claim 17, wherein the passage further includes a third portion adapted to receive a jacket of the fiber optic cable.
19. The anchor of claim 17, further comprising at least one retention tab that fits within a corresponding receiver provided within the fiber optic connector.
20. A method for anchoring a fiber optic cable within a fiber optic connector, the method comprising: providing an anchor including a passage; inserting a strength member and an optical fiber of the fiber optic cable within the passage; injecting bonding material within the passage such that the bonding material directly contacts and adheres the strength member and the optical fiber; and attaching the anchor within an interior of a connector housing of the fiber optic connector.
21. A fiber optic connector and cable assembly comprising: a fiber optic cable including an optical fiber, a jacket surrounding the optical fiber, and at least one strength member for providing the fiber optic cable with axial reinforcement; a connector housing including a first end positioned opposite from a second end, the first end defining a plug portion adapted for insertion in a fiber optic adapter and the at least one strength member of the fiber optic cable being anchored at the second end; a ferrule positioned at the first end of the connector housing, the ferrule receiving an end portion of the optical fiber, the ferrule defining an axis that extends through the connector housing from the first end to the second end of the connector housing; and an anchor positioned at the second end of the connector housing, the optical fiber being directly contacted and adhered by a bonding material within the anchor, wherein the optical fiber is adapted such that it is bonded to the anchor before the anchor is positioned at the second end of the connector housing.
22. A method for anchoring a fiber optic cable within a fiber optic connector, the fiber optic cable including: an optical fiber, a jacket surrounding the optical fiber, and at least one strength member for providing the fiber optic cable with axial reinforcement; and the fiber optic connector including: a connector housing including a first end positioned opposite from a second end, the first end defining a plug portion adapted for insertion in a fiber optic adapter and the at least one strength member of the fiber optic cable being anchored at the second end; and a ferrule positioned at the first end of the connector housing, the ferrule receiving an end portion of the optical fiber, the ferrule defining an axis that extends through the connector housing from the first end to the second end of the connector housing, the method comprising: directly contacting the optical fiber with a bonding material and adhering the optical fiber by the bonding material within an anchor; and positioning the anchor at the second end of the connector housing after adhering the optical fiber to the anchor with the bonding material.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
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DETAILED DESCRIPTION
(33) According to the principles of the present disclosure, a fiber optic cable can be securely attached to a fiber optic connector. In certain embodiments, crimp bands, crimp rings, etc. are not used. Instead, strength members of a fiber optic cable are internally bonded within an anchor that anchors the strength members to a fiber optic connector. In certain embodiments, a passage extends through the anchor, and the strength members are inserted within the passage and bonded within the passage to the anchor. An optical fiber of the fiber optic cable may also extend through the passage of the anchor. In certain embodiments, the strength members terminate within the passage of the anchor. The fiber optic cable may thereby be terminated by the fiber optic connector. In certain embodiments, the fiber optic connector may be a hardened fiber optic connector.
(34) Turning now to
(35) As illustrated at
(36) Turning now to
(37) In the depicted embodiment, the housing components 60, 70 include the female half of the connection and the anchor 100 includes the male half of the connection. In other embodiments, the receivers 62, 72 may be replaced with a male member, such as a tab Likewise, the retention tabs 150 of the anchor 100 may be replaced with a female member, such as a receiver. In the depicted embodiment, the anchor 100 extends between a first end 102 and a second end 104. In the depicted embodiment, the retention tabs 150 are adjacent the first end 102 of the anchor 100. In the depicted embodiment, the second end 104 of the anchor extends proximally beyond the second end 54 of the connector housing 50.
(38) In the depicted embodiment, the first housing component 60 and the second housing component 70 interlock with each other. For example, the first housing component 60 includes a plurality of notches 68 (see
(39) Turning now to
(40) In certain embodiments, the bonding material 90 may adhere to the optical fiber 30 and thereby secure the optical fiber 30 within the passage 110 of the anchor 100. In other embodiments, a tube 28 (see
(41) The anchor 100 may include an injection port 130. The injection port 130 is adapted to inject the bonding material 90 into the passage 110 after the strength members 40, the optical fiber 30, and, optionally, the tube 28 have been installed in the passage 110. As depicted at
(42) Turning now to
(43) The passage 110 may further include a main portion 170. As depicted at
(44) The passage 110 of the anchor 100 further includes a cable jacket portion 180, in certain embodiments. The cable jacket portion 180 is adapted to receive the jacket 26 of the fiber optic cable 20. In particular, the jacket 26 may include an exterior shape that substantially matches an interior shape of the cable jacket portion 180.
(45) In certain embodiments, the cable jacket portion 180 may include a notch 182 (see
(46) In certain embodiments, the notch 182 may be used as a tool to collect portions of the strength members 40 that are outside of the passage 110. In particular, if the jacket 26 and/or the fiber optic cable 20 is partially inserted or fully inserted into the passage 110, the portions of the strength members 40 that are outside of the passage 110 may be collected by the notch 182 by rotating the anchor 100 relative to the fiber optic cable 20 about the axis A1. As the portions of the strength members 40 that are outside of the passage 110 pass by the notch 182, the notch 182 traps the portions and funnels them into the passage 110. The relative rotating motion about the axis Al may be combined with a relative translating motion between the anchor 100 and the fiber optic cable 20.
(47) The cable jacket portion 180 may further include an annular portion 184 and/or portions of an annular portion 184 (see
(48) The fit of the cable jacket portion 180 over the cable jacket 26 may substantially prevent the bonding material 90 from leaking beyond the second end 104 of the anchor 100. The fit of the necked-down portion 120 and/or the cable jacket portion 180 with the fiber optic cable 20, the optical fiber 30, and/or the tube 28 may allow air to vent as the bonding material 90 is injected through the injection port 130. A suitable viscosity for the bonding material 90 may be selected to eliminate and/or minimize bonding material 90 from leaking beyond the necked-down portion 120 and/or the cable jacket portion 180.
(49) Turning now to
(50) As depicted, the fiber optic connector and cable assembly 10 is adapted to terminate a noncircular fiber optic cable 20. In particular, the fiber optic cable 20 includes a pair of strength members 40 positioned opposite an optical fiber 30. A jacket 26 of the fiber optic cable 20 may therefore be rectangular or obround in shape. As depicted, the pair of strength members 40 are opposite each other about a horizontal direction. The injection port 230 extends perpendicular to the horizontal plane and thereby allows the bonding material 90 to flow between the strength members 40 (see
(51) The anchor 200 extends between a first end 202 and a second end 204. The anchor 200 includes a passage 210 that extends through the anchor 200 and through the first end 202 and the second end 204. The passage 210 includes a necked-down portion 220, a main portion 270, and a cable jacket portion 280. The passage 210 may be shaped generally rectangularly or may be shaped obround to accommodate the pair of the strength members 40 and the jacket 26.
(52) The anchor 200 may further include a shrink wrap receiving area 250. As depicted, the shrink wrap receiving area 250 is on an exterior of the anchor 200 and positioned adjacent the second end 204 of the anchor 200. The cable anchor 200 may further include a finger 252 (see
(53) In certain embodiments, the fiber optic connector and cable assembly 10, 10 provides strain relief for cables (e.g., 20, 20) with strength members (e.g., 40, 40) of glass and/or metal as well as for yarn of glass and/or aramid material.
(54) The above system may include molded and/or machined parts (e.g., 60, 70, 100, and/or 200). A stripped cable (e.g., 20, 20) may be inserted from one end. The optical fiber (e.g., 30) passes through the anchor 100, 200. Via the port 130, 230 (e.g., a hole), the anchor 100, 200 is filled with epoxy or hot melt. In this way the mechanical carrier (i.e., the strength members 40, 40) are fixated to the anchor 100, 200 (i.e., a cable fixation part). The epoxy and/or hot melt seals the cable (e.g., 20, 20) to the anchor 100, 200. When the ferrule 80 is added, the assembly can be inserted in the housing 50 in such a way that a tuned fiber optic connector can be achieved.
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(56) In embodiments with the optical fiber 30 fixed to the anchor 100, 200, the anchor 100, 200 may prevent the optical fiber 30 from rotating at the anchor 100, 200.
(57) From the foregoing detailed description, it will be evident that modifications and variations can be made in the devices of the present disclosure without departing from the spirit or scope of the invention.
PARTS LIST
(58) A1 axis
(59) 10 fiber optic connector and cable assembly
(60) 10 fiber optic connector and cable assembly
(61) 20 fiber optic cable
(62) 20 fiber optic cable
(63) 22 end portion
(64) 26 jacket
(65) 26 a jacket
(66) 28 tube
(67) 30 optical fiber
(68) 32 end portion
(69) 40 strength member
(70) 40 strength member
(71) 50 connector housing
(72) 52 first end
(73) 54 second end
(74) 56 plug portion
(75) 58 passage
(76) 60 first housing component
(77) 62 receiver
(78) 64 proximal extension
(79) 66 grooves
(80) 68 notches
(81) 70 second housing component
(82) 72 receiver
(83) 78 tabs
(84) 80 ferrule
(85) 81 hub
(86) 82 spring holder
(87) 84 tube
(88) 86 spring
(89) 88 direction
(90) 90 bonding material
(91) 100 anchor
(92) 102 first end
(93) 104 second end
(94) 110 passage
(95) 120 necked-down portion
(96) 122 outer taper
(97) 124 inner taper
(98) 130 injection port
(99) 140 attachment portion
(100) 150 retention tab
(101) 150a retention tab
(102) 150b retention tab
(103) 160 protrusions
(104) 170 main portion
(105) 180 cable jacket portion
(106) 182 notch
(107) 184 annular portion
(108) 186 bottom
(109) 190 shrink tube
(110) 192 first end
(111) 194 second end
(112) 200 anchor
(113) 202 first end
(114) 204 second end
(115) 210 passage
(116) 220 necked-down portion
(117) 230 injection port
(118) 250 shrink wrap receiving area
(119) 252 finger
(120) 270 main portion
(121) 280 cable jacket portion