Fiber optic connector with strain relief assembly

• US 9,551,842 B2
• Filed: 01/11/2016
• Issued: 01/24/2017
• Est. Priority Date: 01/15/2015
• Status: Active Grant

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Inventors: Theuerkorn, Thomas
• Primary Examiner(s): Ullah, Akm Enayet
• Assistant Examiner(s): MOONEY, MICHAEL P
• Application Number:
  US14/992,433
• Publication Number:
  US 20160209602A1
• Time in Patent Office: 379 Days
• Field of Search: 385 53- 87
• US Class Current: 1/1
• CPC Class Codes: G02B 6/3807 Dismountable connectors, i.e. comprising plugs
• CPC Class Codes: G02B 6/381 of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
• CPC Class Codes: G02B 6/3821 with axial spring biasing or loading means G02B6/3847 takes precedence
• CPC Class Codes: G02B 6/3858 Clamping, i.e. with only elastic deformation
• CPC Class Codes: G02B 6/3869 Mounting ferrules to connector body, i.e. plugs
• CPC Class Codes: G02B 6/387 Connector plugs comprising two complementary members, e.g. shells, caps, covers, locked together
• CPC Class Codes: G02B 6/38875 Protection from bending or twisting
• CPC Class Codes: G02B 6/3888 Protection from over-extension or over-compression
• CPC Class Codes: G02B 6/3893 Push-pull type, e.g. snap-in, push-on

Abstract

A fiber optic connector includes a ferrule, a ferrule holder from which the ferrule extends, a housing in which the ferrule holder is received, and a connector body coupled to the housing. The connector body is configured to retain the ferrule holder within the housing. The fiber optic connector further includes a strain relief assembly comprising a support coupled to a rear portion of the connector body and a boot received over support. The support includes a first portion defining a front end of the support and a second portion defining a back end of the support, with the second portion having a stiffness less than the first portion. Additionally, the support and boot are formed from respective first and second materials, with the second material being less rigid than the first material.

Claims

1. A fiber optic connector, comprising:

a ferrule configured to support at least one optical fiber;

a ferrule holder from which the ferrule extends;

a housing in which the ferrule holder is received;

a connector body coupled to the housing and configured to retain the ferrule holder within the housing, the connector body having a front portion at least partially received in the housing and a rear portion at least partially outside of the housing; and

a strain relief assembly, comprising;

a support coupled to the rear portion of the connector body, wherein the support includes a first portion defining a front end of the support, a second portion defining a back end of the support, and a transition region between the first and second portions, the second portion having a stiffness less than the first portion; and

a boot received over the first portion of the support and extending rearwardly over the transition region and second portion, wherein the support and boot are formed from respective first and second materials, the second material being less rigid than the first material.

2. The fiber optic connector of claim 1, wherein the second portion of the support is substantially cylindrical and includes at least one lateral opening.

3. The fiber optic connector of claim 2, wherein the support extends along a longitudinal axis of the fiber optic connector, and further wherein the at least one lateral opening in the second portion of the support comprises a plurality of circumferentially-extending openings.

4. The fiber optic connector of claim 1, wherein the first material comprises an elastomer and the second material comprises a polycarbonate or metal.

5. The fiber optic connector of claim 1, wherein the boot is over-molded onto the first portion of the support.

6. The fiber optic connector of claim 1, wherein the first portion of the support includes at least one rib extending through a wall of the boot.

7. The fiber optic connector of claim 6, further comprising:

a shroud received over the housing, connector body, and at least a portion of the strain relief assembly, wherein the at least one rib on the first portion of the support extends through the wall of the boot toward an inner surface of the shroud.

8. The fiber optic connector of claim 7, wherein the at least one rib on the first portion of the support contacts the inner surface of the shroud.

9. The fiber optic connector of claim 8, wherein the at least one rib comprises at least one planar projection extending from an outer surface of the first portion of the support.

10. The fiber optic connector of claim 1, wherein the first portion of the support includes at least one slot extending from the front end of the support, and further wherein the first portion of the support is coupled to the connector body by a snap-fit connection facilitated by the at least one slot.

11. The fiber optic connector of claim 10, wherein the at least one slot comprises opposed first and second slots.

12. The fiber optic connector of claim 1, wherein the strain relief assembly includes a passage extending through the support and boot, and further wherein an inner surface of the support and inner surface of the boot each define a portion of the passage and have complementary geometry where the passage transitions between them.

13. The fiber optic connector of claim 1, wherein at least a portion of the boot that is received over the first portion of the support has a rectangular or substantially rectangular profile when viewed along a longitudinal axis of the fiber optic connector, and further wherein the boot terminates with a circular or substantially circular profile when viewed along the longitudinal axis such that the boot transitions from the rectangular or substantially rectangular profile to the circular or substantially circular profile as the boot extends rearwardly from the first portion of the support.

14. The fiber optic connector of claim 1, wherein the boot extends from the front end of the support and rearwardly over the first portion, transition region, and second portion.

15. A fiber optic connector, comprising:

a ferrule configured to support at least one optical fiber;

a ferrule holder from which the ferrule extends;

a housing in which the ferrule holder is received;

a connector body coupled to the housing and configured to retain the ferrule holder within the housing, the connector body having a front portion at least partially received in the housing and a rear portion at least partially outside of the housing; and

a strain relief assembly, comprising;

a support coupled to the rear portion of the connector body; and

a boot received over support and extending rearwardly therefrom, wherein the support and boot are formed from respective first and second materials, the second material being less rigid than the first material, and further wherein the support includes at least one rib extending through a wall of the boot.

16. The fiber optic connector of claim 15, further comprising:

a shroud received over the housing, connector body, and at least a portion of the strain relief assembly, the at least one rib on the support extending through the wall of the boot toward an inner surface of the shroud.

17. A fiber optic connector, comprising:

a ferrule configured to support at least one optical fiber;

a ferrule holder from which the ferrule extends;

a housing in which the ferrule holder is received;

a connector body coupled to the housing and configured to retain the ferrule holder within the housing, the connector body having a front portion at least partially received in the housing and a rear portion at least partially outside of the housing;

a shroud received over the housing and the connector body; and

a strain relief assembly comprising;

a support coupled to the rear portion of the connector body, wherein the support includes a first portion and second portion, the first portion defining a front end of the support and at least a first quarter of the support, the second portion defining a back end of the support an at least a last quarter of the support, the second portion having a stiffness less than the first portion; and

a boot received over the support and extending rearwardly therefrom, wherein a portion of the boot is positioned between the first portion of the support and the shroud, and further wherein the support and boot are formed from respective first and second materials, the second material being less rigid than the first material.

18. The fiber optic connector of claim 17, wherein the first portion of the support includes at least one rib extending through a wall of the boot toward an inner surface of the shroud.

19. The fiber optic connector of claim 17, wherein the boot is received over support such that the boot extends from the front end of the support and rearwardly over the first and second portions.

20. A fiber optic cable assembly, comprising:

a fiber optic cable having at least one optical fiber; and

a fiber optic connector according installed on the fiber optic cable, wherein the fiber optic connector comprises;

a ferrule configured to support at least one optical fiber;

a ferrule holder from which the ferrule extends;

a housing in which the ferrule holder is received;

a connector body coupled to the housing and configured to retain the ferrule holder within the housing, the connector body having a front portion at least partially received in the housing and a rear portion at least partially outside of the housing; and

a strain relief assembly, comprising;

a support coupled to the rear portion of the connector body, wherein the support includes a first portion defining a front end of the support, a second portion defining a back end of the support, and a transition region between the first and second portions, the second portion having a stiffness less than the first portion; and

a boot received over the first portion of the support and extending rearwardly over the transition region and second portion, wherein the support and boot are formed from respective first and second materials, the second material being less rigid than the first material.