Fiber optic connector, supporting member used therein, and method of connecting the fiber optic connector to a fiber optic cable

• US 6,238,104 B1
• Filed: 02/10/1999
• Issued: 05/29/2001
• Est. Priority Date: 02/10/1998
• Status: Expired due to Fees

• Current Assignee: The Whitaker Corporation (Meggitt PLC)
• Original Assignee: Tyco Electronics Corporation (TE Connectivity Limited)
• Inventors: Takahashi, Kenji, Hayashi, Takehiro, Kikuta, Tomohiro, Yamakawa, Jun, Shiino, Masato
• Primary Examiner(s): Nguyen, Thong
• Application Number:
  US09/247,273
• Time in Patent Office: 839 Days
• Field of Search: 385/53-55, 385/60, 385/62, 385/69, 385/70, 385/72, 385/76-78, 385/81, 385/92, 385/86-88
• US Class Current: 385/87
• CPC Class Codes: G02B 6/3869 Mounting ferrules to connector body, i.e. plugs
• 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

The present invention provides a fiber optic connector which allows easy and secure assembly with a fiber optic cable, a supporting member used therein, and a method of assembling the fiber optic connector to the fiber optic cable. A member (41) which is used to fasten reinforcing members (105) extending from the fiber optic cable (100) is disposed in the vicinity of a rear end of an inner housing (40) of fiber optic connector (10). A supporting member (50) is fastened by crimping to an end portion of the fiber optic cable (100). An appropriate stripping operation is performed on the end portion of the fiber optic cable (100) so that optical fiber (150) and the reinforcing members (105) are exposed. Recesses (55a, 55b), which hold the reinforcing members are located in the supporting member (50). When optical fiber (150) of the fiber optic cable (100) is accommodated in a ferrule (30), the supporting member (50) is caused to engage a rear end of the inner housing (40); the reinforcing members (105) are disposed along member (41) of housing (40) whereafter they are fastened to member (41) by crimping sleeve (90) onto member (41).

Claims

1. A fiber optic connector for connection to a fiber optic cable, comprising

a housing having a ferrule provided with a bore in which an optical fiber of the fiber optic cable is secured and a fastening member;

and

a supporting member having a securing section for engagement with an end portion of the fiber optic cable and a holding section for holding reinforcing members of the fiber optic cable for disposition along the fastening member prior to being fastened thereto, wherein the holding section comprises at least one passageway through the supporting member to allow the reinforcing members to pass laterally from inside the supporting member to outside the supporting member, and wherein the securing section is a crimping section to effect crimping engagement with the end portion of the fiber optic cable.

2. A fiber optic connector as claimed in claim 1, wherein the passageway comprises recesses.

3. A fiber optic connector as claimed in claim 2, wherein the supporting member comprises another recess for accommodating a portion of an outer covering of the fiber optic cable.

4. A fiber optic connector as claimed in claim 2, wherein the holding section engages an outer end of the fastening member.

5. A fiber optic connector as claimed in claim 1, wherein a sleeve is disposed over the supporting member and includes a small-diameter portion for crimping engagement with the crimping section and a large-diameter portion for crimping engagement onto the fastening member to fasten the reinforcing members thereon.

6. A fiber optic connector as claimed in claim 5, wherein a strain-relief member has a large-diameter section disposed along the large-diameter portion of the supporting member and a small-diameter section extending along the fiber optic cable.

7. A fiber optic connector as claimed in claim 1, wherein the supporting member is a sleeve having a small-diameter portion defining a crimping section for crimping engagement with the end portion of the fiber optic cable and a large-diameter portion including recesses in which the reinforcing members are disposed and which is crimped onto the fastening member.

8. A method of connecting a fiber optic connector to a fiber optic cable, comprising the steps of:

stripping the fiber optic cable exposing an optical fiber and reinforcing members;

securing one end of a supporting member onto an outer covering of the fiber optic cable;

inserting the reinforcing members in one end of the supporting member;

guiding the reinforcing members laterally out of the supporting member;

moving the supporting member adjacent a fastening member of a housing with the optical fiber being disposed in a bore of a ferrule within the housing such that the reinforcing members are arranged along the fastening member; and

securing the optical fiber within the bore of the ferrule.

9. A method as claimed in claim 8, wherein the one end of the supporting member is secured onto the outer covering of the fiber optic cable by crimping.

10. A method as claimed in claim 9, wherein a sleeve covers the supporting member with one end of the sleeve being crimped onto the crimped end of the supporting member and the other end of the sleeve being crimped onto the fastening member with the reinforcing members therebetween.

11. A method as claimed in claim 10, wherein a portion of the outer covering is positioned in another recess of the supporting member so that the portion of the outer covering is located between the crimped other end and the fastening member.

12. A method as claimed in claim 10, wherein a strain-relief member covers the sleeve with an inner end engaging the other end of the sleeve and an outer end extending along a section of the fiber optic cable.

13. A method as claimed in claim 8, wherein the supporting member is a sleeve with the one end being crimped onto the outer covering of the fiber optic cable and the other end of the sleeve having the recesses in which the reinforcing members are positioned and crimping the other end of the sleeve onto the fastening member with the reinforcing members therebetween.

14. A method as claimed in claim 13, wherein a portion of the outer covering is positioned within another recess of the sleeve so that the portion of the outer covering is located between the crimped other end and the fastening member.