Optical fiber fitting

• US 20020186933A1
• Filed: 06/11/2002
• Published: 12/12/2002
• Est. Priority Date: 06/12/2001
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Suzuki, Masayuki
• Granted Patent: US 6,736,549 B2
• Time in Patent Office: Days
• US Class Current: 385/78
• CPC Class Codes: G02B 6/4248 Feed-through connections for the hermetical passage of fibres through a package wall see provisionally also G02B6/4428

Abstract

An optical fiber fitting includes a cylindrical sleeve having a first annular groove extending normal to the axial direction on the inner surface of the cylindrical sleeve, a rod member having a plurality of channels each extending in the axial direction and receiving therein an optical fiber and a second annular groove extending normal to the axial direction, and a C-shape spring, having a radially outer surface received in the first annular groove and a radially inner surface received in the second annular groove, for locking the rod member with the cylindrical sleeve.

Claims

1. An optical fiber fitting comprising:

a cylindrical sleeve having an inner surface, said inner surface having thereon a first annular groove extending normal to an axial direction of said cylindrical sleeve;

a ring-like spring member having a radially outer surface received in said first annular groove, with a radially inner surface of said spring member protruding from said first annular groove; and

a rod member having a cylindrical portion received in said cylindrical sleeve, said cylindrical portion having thereon at least one channel extending along said axial direction for receiving therein an optical fiber and a second annular groove extending normal to said axial direction and receiving therein said radially inner surface of said spring member, said spring member locking said rod member with said cylindrical sleeve.

2. The optical fiber fitting according to claim 1, wherein said rod member has another cylindrical portion at a rear side of said cylindrical portion, and a coupling portion for coupling together said cylindrical portion and said another cylindrical portion.

3. The optical fiber fitting according to claim 1, wherein said spring member has a shape of character “

C”

.

4. The optical fiber fitting according to claim 1, wherein a gap between said cylindrical sleeve and said coupling portion of said rod member is filled with a metal for airtight.

5. The optical fiber fitting according to claim 1, wherein said channel receives therein a plurality of optical fibers.

6. The optical fiber fitting according to claim 1, wherein said cylindrical portion has a chamfer at a front edge thereof.