High-density optical connecting block

• US 6,478,472 B1
• Filed: 01/10/2001
• Issued: 11/12/2002
• Est. Priority Date: 01/10/2001
• Status: Expired due to Term

• Current Assignee: Furukawa Electric North America Incorporated (Furukawa Electric Company Limited)
• Original Assignee: Fitel USA Corporation (Furukawa Electric Company Limited)
• Inventors: Sheldon, Steven Edward, Anderson, Jerry Max
• Primary Examiner(s): PATEL, TULSIDAS C
• Application Number:
  US09/756,715
• Publication Number:
  US 20020172467A1
• Time in Patent Office: 671 Days
• Field of Search: 385/53, 385/55, 385/59, 385/71, 385/135, 385/136, 385/137, 385/139
• US Class Current: 385/53
• 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 6/3897 Connectors fixed to housings, casing, frames or circuit boards G02B6/44528 takes precedence

Abstract

A high density optical connecting block 100 is mounted in a relatively thin, flat panel 10, and is constructed as an array of identical cells 110 that are linked together as a one-piece unit. The connecting block has a front-to-back depth that is greater than ten millimeters for imparting flexural rigidity to the panel. The array includes at least twelve cells that are arranged in two or more rows and two or more columns. Each cell has a front side that is shaped to receive and interlock with a duplex optical connector 50, and a back side that is shaped to receive and interlock with two simplex optical plugs 20. The duplex connector is a unifying structure that yokes a pair of simplex optical plugs 20-1, 20-2 into a duplex configuration. The duplex connector includes a pair of side-by-side cavities 153-153, each having: (i) an opening at a back end that is shaped to receive a simplex optical plug, (ii) a tubular boss 58 for holding a cylindrical ferrule or a plastic optical fiber, the boss projecting into and out of the cavity from a front-end wall 57 of the cavity and having a central axis that is perpendicular to the front-end wall, and (iii) a retaining feature 54 for holding each simplex plug within the cavity. Additionally, the duplex connector includes latching members 55-55 on its top and bottom sides that interlock with the cell.

Claims

1. A high-density, optical connecting block for mounting in a generally flat panel, said connecting block comprising a plurality of interlocked horizontal and vertical ribs that form at least twelve cells, which are disposed in an array comprising at least two rows and at least two columns, each cell being substantially identical to the others in size, shape and orientation, each cell comprising a back side having a pair of receptacles that are adapted to receive individual optical plugs, each cell comprising a front side that is adapted to receive a duplex optical connector, and each cell further comprising at least one opening in the front side for receiving a guide member on the duplex optical connector, said opening including a retaining feature for interlocking with the duplex optical connector.

2. The optical connecting block of claim 1 wherein the interlocked horizontal and vertical ribs have a front-to-back depth that exceeds ten millimeters thereby providing flexural rigidity to the panel.

3. The optical connecting block of claim 1 wherein said connecting block is molded as a unitary structure from a polymeric material.

4. The optical connecting block of claim 1 wherein said connecting block comprises at least eighteen cells that are disposed in an array comprising at least three rows and at least six columns.

5. The optical connecting block of claim 4 wherein said connecting block comprises at least thirty-six cells that are disposed in an array comprising at least three rows and at least twelve columns.

6. The optical connecting block of claim 1 wherein the back side of the connecting block includes pairs of optical ports, each pair being associated with one cell and each port comprising a plurality of internal walls that define a cavity that includes:

(i) a generally rectangular entrance for receiving the optical plug, and (ii) a retaining surface that is molded into a top portion of the cavity for holding the optical plug within the cavity.

7. The optical connecting block of claim 1 wherein each cell includes a pair of openings for receiving guide members on the duplex optical connector, said openings being disposed at the top and bottom sides of each cell.

8. The optical connecting block of claim 7 wherein said pair of openings in each cell have different shapes, which preclude the duplex connector from being inserted into the cell in more than one orientation.

9. In combination, a connecting block and a plurality of duplex optical connectors,

the connecting block comprising:

an array of substantially identical cells that are molded into a one-piece unit, the array comprising at least twelve cells that are arrayed in two or more rows and two or more columns, each cell including a front side that is shaped to receive a duplex optical connector, each cell including at least one opening for receiving a guide member on the duplex optical connector, each cell including a first retaining feature that is shaped to interlock with the duplex connector, and each cell further including a back side with a pair of optical receptacles having generally rectangular entrances for receiving individual optical plugs, each optical receptacle having a second retaining feature that is shaped to interlock with the optical plug,

each duplex optical connector comprising;

a pair of side-by-side optical ports, each port including a plurality of internal walls that define a cavity having;

(i) an opening in a back end thereof that is shaped to receive a predetermined optical plug, (ii) a tubular boss for holding a cylindrical ferrule, said boss projecting from a wall at a front end of the connector, and (iii) a retaining feature within the cavity for holding the predetermined optical plug within the cavity; and

a latching member that is disposed on at least one outside surface of the duplex connector for engagement with the first retaining feature of the cell for interlocking the duplex connector with the cell.

10. The combination of claim 9 wherein the connecting block comprises at least eighteen cells that are disposed in an array comprising at least three rows and at least six columns.

11. The combination of claim 10 wherein the connecting block comprises at least thirty-six cells that are disposed in an array comprising at least three rows and at least twelve columns.

12. The combination of claim 9 wherein the duplex connector includes a pair of tongue-like projections that are disposed on its top and bottom sides for guiding the duplex connector into the cell during insertion.

13. The combination of claim 9 wherein the duplex connector further includes an alignment sleeve that is disposed within the tubular boss.