Hardened Fiber Optic Connector and Cable Assembly with Multiple Configurations

• US 20090148103A1
• Filed: 09/03/2008
• Published: 06/11/2009
• Est. Priority Date: 12/11/2007
• Status: Active Grant

• Current Assignee: CommScope Technologies, LLC (CommScope Holding Company, Inc.)
• Original Assignee: Tyco Electronics Services GmbH (TE Connectivity Limited)
• Inventors: Reagan, Randy, Lu, Yu
• Granted Patent: US 7,942,590 B2
• Time in Patent Office: Days
• US Class Current: 385/62
• CPC Class Codes: G02B 6/3816 for use under water, high pressure connectors provisionally see G02B6/4428
• CPC Class Codes: G02B 6/3821 with axial spring biasing or loading means G02B6/3847 takes precedence
• CPC Class Codes: G02B 6/3825 with an intermediate part, e.g. adapter, receptacle, linking two plugs
• CPC Class Codes: G02B 6/3826 characterised by form or shape
• CPC Class Codes: G02B 6/3849 using mechanical protective elements, e.g. caps, hoods, sealing membranes G02B6/3816 takes precedence; provisionally see H01R13/44
• CPC Class Codes: G02B 6/3877 Split sleeves
• CPC Class Codes: G02B 6/3887 Anchoring optical cables to connector housings, e.g. strain relief features
• CPC Class Codes: G02B 6/3893 Push-pull type, e.g. snap-in, push-on
• CPC Class Codes: G02B 6/3894 Screw-lock type
• CPC Class Codes: G02B 6/4433 Double reinforcement laying in straight line with optical transmission element

Abstract

A fiber optic connector and cable assembly includes a cable with one or more strength members secured to a connector that is connectable to both a hardened and a non-hardened fiber optic adapter. The cable can include multiple cable types with various shapes and strength member configurations. The connector includes a connector housing having a one-piece main body and a cover piece mounted thereon. The one-piece main body defines a plug portion compatible with the adapters. A ferrule assembly is mounted in the plug portion and biased outwardly by a spring. An insert within the connector housing includes a spring stop for holding the spring and a cable retention portion for securing the strength members of the cable. The spring stop and the cable retention portion can be included on a one-piece insert or they can separately be included on separate inserts. The cable retention portion of the insert and the cover piece can take various forms suited for a particular cable of a given fiber optic connector and cable assembly.

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 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 second end receiving the at least one strength member and the optical fiber of the fiber optic cable;

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;

a spring for biasing the ferrule in a direction that extends outwardly from the first end of the connector housing along the axis of the ferrule; and

an insert that mounts within the connector housing, the insert including a first portion that forms a spring stop for retaining the spring within the plug portion of the connector housing, the insert also including a cable retention portion to which the at least one strength member of the fiber optic cable is secured.

2. The fiber optic connector and cable assembly of claim 1, wherein the cable retention portion of the insert includes at least a first strength member receiving channel portion in which the at least one strength member of the fiber optic cable is received.

3. The fiber optic connector and cable assembly of claim 2, wherein the connector housing includes a second strength member receiving channel portion that opposes the first strength member receiving channel portion of the insert, wherein the at least one strength member is positioned between the first and second strength member receiving channel portions.

4. The fiber optic connector and cable assembly of claim 1, wherein the fiber optic cable includes at least two of the strength members and also includes a buffer tube that surrounds the optical fiber, wherein the cable retention portion of the insert includes two first strength member receiving channel portions separated by a first buffer tube receiving channel portion, wherein the strength members are received in the first strength member receiving channel portions and the buffer tube is received in the first buffer tube receiving channel portion.

5. The fiber optic connector and cable assembly of claim 4, wherein the connector housing includes two second strength member receiving channel portions separated by a second buffer tube receiving channel portion, wherein the second strength member receiving channel portions oppose the first strength member receiving channel portions and the first buffer tube receiving channel portion opposes the second buffer tube receiving channel portion, and wherein the strength members are received between the first and second strength member receiving channel portions and the buffer tube is received between the first and second buffer tube receiving channel portions.

6. The fiber optic connector and cable assembly of claim 1, further comprising a first set of intermeshing gripping teeth, the first set of intermeshing gripping teeth including a first plurality of gripping teeth provided on the insert and a second plurality of gripping teeth provided on the connector housing, wherein the strength member is positioned between the first and second pluralities of gripping teeth.

7. The fiber optic connector and cable assembly of claim 6, wherein the first and second pluralities of gripping teeth are each spaced along a line that is generally parallel to the axis of the ferrule.

8. The fiber optic connector and cable assembly of claim 6, wherein the strength member includes a plurality of yarns grouped together and passed between the first and second pluralities of gripping teeth.

9. The fiber optic connector and cable assembly of claim 1, further comprising first and second sets of intermeshing gripping teeth separated by a buffer tube channel, each of the first and second sets of intermeshing gripping teeth including a first plurality of gripping teeth provided on the insert and a second plurality of gripping teeth provided on the connector housing, wherein the fiber optic cable includes a plurality of the strength members and a buffer tube surrounding the optical fiber, wherein the strength members are positioned between the first and second pluralities of gripping teeth of the first and second sets of intermeshing gripping teeth, and wherein the buffer tube is positioned within the buffer tube channel.

10. The fiber optic connector and cable assembly of claim 1, wherein the connector housing includes a one-piece main body defining 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, wherein the connector housing includes a cover piece that mounts to the proximal extension, wherein the cable retention portion of the insert is positioned between the proximal extension and the cover piece, and wherein the insert includes a plurality of retention tabs that fit within corresponding slots defined by the proximal extension.

11. The fiber optic connector and cable assembly of claim 10, wherein the insert includes a flex point between the spring stop and the cable retention portion for facilitating inserting the insert into the one-piece main body of the connector housing.

12. The fiber optic connector and cable assembly of claim 1, wherein the connector housing includes a one-piece main body defining 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, wherein the connector housing includes a cover piece that mounts to the proximal extension, wherein the cable retention portion of the insert is positioned between the proximal extension of the one-piece main body and the cover piece, wherein a first portion of the strength member is clamped between the cable retention portion of the insert and the cover piece, and wherein a second portion of the strength member is clamped between the cover piece and the proximal extension of the one-piece main body.

13. The fiber optic connector and cable assembly of claim 3, wherein the connector housing includes a one-piece main body defining 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, wherein the connector housing includes a cover piece that mounts to the proximal extension, wherein the cable retention portion of the insert is positioned between the proximal extension of the one-piece main body and the cover piece, and wherein the second strength member receiving channel portion is provided on the cover piece.

14. A fiber optic connector and cable assembly comprising:

a fiber optic cable including an optical fiber, a jacket surrounding the optical fiber, and a plurality of reinforcing yarns 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 second end receiving at least some of the plurality of reinforcing yarns and the optical fiber of the fiber optic cable;

a ferrule positioned at the first end of the connector housing, the ferrule receiving an end portion of the optical fiber, the ferule defining an axis that extends through the connector housing from the first end to the second end of the connector housing; and

first and second sets of intermeshing gripping teeth separated by a fiber channel, each of the first and second sets of intermeshing gripping teeth including a first plurality of gripping teeth and a second plurality of gripping teeth;

wherein the reinforcing yarns are separated into groups that are positioned between the first and second pluralities of gripping teeth of the first and second sets of intermeshing gripping teeth; and

wherein the optical fiber of the fiber optic cable passes through the fiber channel.

15. 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 second end receiving the at least one strength member and the optical fiber of the fiber optic cable;

a ferrule positioned at the first end of the connector housing, the ferrule receiving an end portion of the optical fiber, the ferule defining an axis that extends through the connector housing from the first end to the second end of the connector housing; and

an anchor retained within the connector housing, the at least one strength member being secured to the anchor such that the anchor anchors the at least one strength member to the connector housing.

16. The fiber optic connector and cable assembly of claim 15, wherein the at least one strength member is secured to the anchor prior to retaining the anchor within the connector housing.

17. The fiber optic connector and cable assembly of claim 15, wherein the at least one strength member is secured to the anchor by a crimp band.

18. The fiber optic connector and cable assembly of claim 15, wherein the at least one strength member includes a plurality of reinforcing yarns.

19. The fiber optic connector and cable assembly of claim 15, wherein the anchor includes retention tabs that fit within corresponding notches provided on the connector housing.

20. The fiber optic connector and cable assembly of claim 15, wherein the anchor is positioned between at least first and second components of the connector housing that are secured together during assembly of the connector housing.

21. A fiber optic connector and cable assembly system for enhancing manufacturing efficiency, the system comprising:

a connector housing including a one-piece main body 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, the one-piece main body also including a proximal extension that extends from the plug portion to the second end of the one-piece main body;

a ferrule positioned at the first end of the connector housing, the ferrule receiving an end portion of an optical fiber, the ferule defining an axis that extends through the connector housing from the first end to the second end of the one-piece main body;

a spring for biasing the ferrule in a direction that extends outwardly from the first end of the one-piece main body of the connector housing along the axis of the ferrule;

a first assembly including a first cover piece and a first insert, the first assembly being adapted to be assembled with the one-piece main body to secure the spring within the plug portion of the one-piece main body and to secure a first fiber optic cable to the one-piece main body, wherein the first fiber optic cable includes a first optical fiber, two strength members positioned at opposite sides of the first optical fiber, and a first jacket surrounding the first optical fiber and the strength members, the first jacket defining a non-circular outer cross-sectional shape;

a second assembly including a second cover piece and a second insert, the second assembly being adapted to be assembled with the one-piece main body to secure the spring within the plug portion of the one-piece main body and to secure a second fiber optic cable to the one-piece main body, wherein the second fiber optic cable includes a second optical fiber, reinforcing yarns positioned around the second optical fiber and a second jacket surrounding the second optical fiber and the reinforcing yarns, the second jacket defining a circular outer cross-sectional shape;

wherein selection of one of the first assembly or the second assembly allows either the first fiber optic cable or the second fiber optic cable to be secured to the one-piece main body.