Optical connector receptacle having switching capability

• US 6,511,231 B2
• Filed: 02/15/2001
• Issued: 01/28/2003
• Est. Priority Date: 12/27/2000
• Status: Expired due to Term

• Current Assignee: Furukawa Electric North America Incorporated (Furukawa Electric Company Limited)
• Original Assignee: Fitel USA Corporation
• Inventors: Mock, Joel L., Lampert, Norman R.
• Primary Examiner(s): Feild, Lynn D.
• Assistant Examiner(s): WEBB, BRIAN SCOTT
• Application Number:
  US09/784,574
• Publication Number:
  US 20030002808A1
• Time in Patent Office: 712 Days
• Field of Search: 385/70, 385/60, 439/489, 439/188, 200/51.09
• US Class Current: 385/70
• CPC Class Codes: G02B 2006/4297 having protection means, e.g. protecting humans against accidental exposure to harmful laser radiation
• CPC Class Codes: G02B 6/3825 with an intermediate part, e.g. adapter, receptacle, linking two plugs
• CPC Class Codes: G02B 6/3893 Push-pull type, e.g. snap-in, push-on
• CPC Class Codes: G02B 6/3895 identification of connection, e.g. right plug to the right socket or full engagement of the mating parts keying element on the plug or adapter G02B6/3831; keying element on the ferrule G02B6/3851; keying element for electrical connection H01R13/64
• CPC Class Codes: G02B 6/3897 Connectors fixed to housings, casing, frames or circuit boards G02B6/44528 takes precedence
• CPC Class Codes: G02B 6/4296 coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources

Abstract

An optical fiber connector adapter has a sensing mechanism for determining when the adapter has a connector plug therein and when the adapter is vacant or empty. The sensing mechanism creates an indication of the state of the adapter which is transmitted to a control circuit. The control circuit responds to the indication by activating or de-activating a laser, for example, which applies optical energy to the adapter. The laser is deactivated when the adapter has no connector plug therein and is activated when there is a connector plug in place in the adapter. In two of the embodiments of the invention, the sensing mechanism signals the impending insertion or withdrawal of the connector plug relative to the adapter.

Claims

1. An optical fiber coupling adapter assembly comprising:

an adapter housing having a receptacle therein for receiving a connector plug having a ferrule extending from its front end and a latching arm;

said adapter having a latching surface within said receptacle which latches the connector in place when said surface is engaged by the latching arm;

said adapter having a sensing means therein for sensing when said surface is so engaged by the latching arm and producing an indication of the latched condition; and

said sensing means being positioned to respond to an unlatching of the latching arm in said receptacle prior to withdrawal of the connecter plug for producing an indication of the unlatched condition prior to such plug withdrawal.

2. An optical fiber coupling adapter as claimed in claim 1 wherein said receptacle has an open end, and said sensing mechanism comprises a cantilevered leaf spring having a distal end and having an end thereof affixed to said adapter and extending toward said open end to its distal end;

a contact member affixed to said adapter adjacent the distal end and spaced therefrom a distance sufficient to be contacted by said distal end when said leaf spring is flexed by the connector plug when it is substantially fully inserted into said adapter.

3. An optical fiber coupling adapter assembly as claimed in claim 1 wherein said securing means comprises a cantilevered spring member in said receptacle and an electrical contact member adjacent said latching surface, said spring member being positioned to be moved into engagement with said contact member by the connector plug latching arm when the latching arm engages said latching surface.

4. an optical fiber connector assembly comprising:

a connector plug;

a connector adapter forming a receptacle for said connector plug for receiving and latching said plug therein, and said receptacle having first and second side walls;

said connector plug having a latching arm thereon having a latched position within said receptacle and an unlatched position therein;

a mechanism for sensing the particular latched or unlatched position of said latching arm and producing a signal indicative of the latched or unlatched position of said connector plug.

5. An optical fiber connector assembly as claimed in claim 4 wherein said latching arm has at least one latching lug thereon sand said receptacle has a latching surface therein against which said latching lug bears in the latched position of said connector plug.

6. An optical fiber connector assembly as claimed in claim 5 wherein said sensing means comprises a spring member in said receptacle and an electrical contact member adjacent said latching surface;

said spring member being positioned to engage said contact member when said latching lug engages said latching surface.

7. An optical fiber connector assembly as claimed in claim 6 wherein said spring member is a cantilevered leaf spring having a distal end positioned to be engaged by said latching lug and forced against said contact member when said latching lug bears against said latching surface.

8. An optical fiber connector assembly as claimed in claim 5 wherein said sensing means comprises a magnetic field detecting device mounted in one of said side walls of said receptacle;

and

said latching arm has a magnetic member mounted therein, said magnetic member being adjacent said magnetic field detecting device when said latching arm is in said latched position and removed from said magnetic field detecting device when said latching arm is in its unlatched position.

9. An optical fiber connector assembly comprising a connector plug and a connector receptacle for receiving and latching said plug whereby said plug has a latched or an unlatched condition within said receptacle, said receptacle having a light transmitting member connected thereto and to a control circuit and a light source, said assembly further comprising:

a sensing mechanism in said receptacle for sensing the particular condition signifying the presence or absence of a latched plug for producing a signal indicative of at least one of said conditions;

a movable member on said connector plug for activating said sensing mechanism in response to the latched condition of said plug; and

said signal being applied to said control circuit to activate said light source when said plug is latched in said receptacle.

10. An optical fiber connector assembly as claimed in claim 9 wherein said movable member on said connector comprises a latching arm.

11. An optical fiber connector assembly as claimed in claim 10 wherein said latching arm is a cantilevered resilient member wherein depression thereof unlatches said plug and de-activates said sensing mechanism.