Optical fiber connector latching mechanism

• US 5,542,015 A
• Filed: 11/25/1994
• Issued: 07/30/1996
• Est. Priority Date: 04/08/1993
• Status: Expired due to Term

• Current Assignee: The Whitaker Corporation (Meggitt PLC)
• Original Assignee: The Whitaker Corporation (Meggitt PLC)
• Inventors: Hultermans, Antonius P. C. M.
• Primary Examiner(s): Healy, Brian
• Application Number:
  US08/345,063
• Time in Patent Office: 613 Days
• Field of Search: 385/55, 385/56, 385/60, 385/62, 385/66, 385/70, 385/72, 385/77, 385/78, 385/81, 385/84, 385/87, 385/139
• US Class Current: 385/60
• CPC Class Codes: G02B 6/3821 with axial spring biasing or loading means G02B6/3847 takes precedence
• CPC Class Codes: G02B 6/3825 with an intermediate part, e.g. adapter, receptacle, linking two plugs
• CPC Class Codes: G02B 6/3869 Mounting ferrules to connector body, i.e. plugs
• CPC Class Codes: G02B 6/3877 Split sleeves
• 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

An optical fibre connector is shown comprising a jack mounted to a mother board and a plug mounted to a daughter board. The plug has a slidable insert retained by thrust lances against a shoulder of the plug housing such that the insert can be inserted into a cavity of the jack. Latches of the jack serve to latch onto ribs of the plug insert so as to butt a ferrule of the plug against a ferrule of the jack resiliently together. Further insertion of the insert into the jack causes ribs to release the thrust lances of the plug insert such that the insert springs rearwards allowing the plug housing to slide forwards without spring resistance, enabling absorption of a certain tolerance in the spacing between the daughter board and the mother board.

Claims

1. An optical fibre connector comprising a receptacle jack for receiving on at least one side at least one ferrule for supporting an optical fibre, and a plug for optical connection therewith via connection spring means, characterized in that the jack comprises a housing, thrust disengagement means, and latching means;

and the plug comprises a housing, at least one plug body with at least one ferrule mounted therein for supporting an optical fibre, thrust means to enable insertion of the plug into the jack, and latching means;

whereby the jack latching means cooperate with the plug latching means for retention of the plug body to the jack for optical connection therebetween, and whereby the jack and the plug body are in a static relation during the optical connection, and the plug housing is axially movable over a tolerance absorption distance (T) with respect thereto, this axial movement not influencing the forces generated by the connection spring means.

2. The connector of claim 1 characterized in that each plug ferrule is mounted to a separate plug body.

3. The connector of claim 1 characterized in that the plug body is mounted substantially within a cavity of the plug housing and has an outer surface close to an inner surface of the cavity such that when the thrust means are disengaged the plug body, can slide axially guided in the cavity.

4. The connector of claim 3 characterized in that the plug housing has at a forward end a bridge portion (131) protruding into the cavity, the bridge portion cooperable with a transverse rib of the plug body to retain the plug body from forward extraction from the cavity.

5. The connector of claim 2 characterized in that the plug body is mounted substantially within a cavity of the plug housing and has an outer surface close to an inner surface of the cavity such that when the thrust means are disengaged the plug body, can slide axially guided in the cavity.

6. The connector of any of claims 1-3 or 5 characterized in that the thrust means comprises resilient lances attached to the insert and a shoulder of the plug housing against which the lances abut, such that the insert can be pushed into a latched connection with the plug via a force on the plug housing.

7. The connector of claim 6 characterized in that the lances are integral with a housing of a plug insert.

8. The connector of claim 6 characterized in that the lances project obliquely outwards into an opening of the plug housing such that the thrust disengagement means have access thereto via the opening.

9. The connector of claim 6 characterized in that the jack has ribs extending from the jack housing having an inner surface that resiliently biases the lances inward during insertion of the plug into the jack such that the lances disengage from the shoulder and the insert is free to slide axially rearwards.

10. The connector of any of claims 1-3 or 5 characterized in that the jack latching means comprises latches having a resilient arm attached to the jack housing and extending forwardly therefrom to a free end having a protrusion that cooperates with a rib on the plug body for retention thereof.

11. The connector of claim 10, characterized in that there is at least one pair of latches per plug ferrule.

12. The connector of any of claims 1-3 or 5 characterized in that the plug housing has camming members for cooperation with wings attached to resilient latches of the jack housing, the camming members having camming surfaces whereby the wings overlap these surfaces such that during retraction of the plug from the jack, the wings engage the camming surfaces causing the latches to bias resiliently outward hence unlatching the jack from the plug body.

13. The connector of claim 12 characterized in that the plug has at least one pair of camming members, the camming members extending axially from the top or from the bottom of the plug housing and separated by a cavity that allows access for a jack housing latch projection to engage with a rib of the plug body for retention of the plug to the jack.

14. The connector of claim 13 characterized in that there is at least one pair of camming members on the top side and opposing bottom side of the plug housing.

23. The connector of claim 7 characterized in that the lances project obliquely outwards into an opening of the plug housing such that the thrust disengagement means have access thereto via the opening.

24. The connector of claim 6 characterized in that the jack latching means comprises latches having a resilient arm attached to the jack housing and extending forwardly therefrom to a free end having a protrusion that cooperates with a rib on the plug body for retention thereof.

25. The connector of claim 24 characterized in that there is at least one pair of latches per plug ferrule.

26. The connector of claim 10 characterized in that the plug housing has camming members for cooperation with wings attached to resilient latches of the jack housing, the camming members having camming surfaces whereby the wings overlap these surfaces such that during retraction of the plug from the jack, the wings engage the camming surfaces causing the latches to bias resiliently outward hence unlatching the jack from the plug body.

27. The connector of claims 24 characterized in that the plug housing has camming members for cooperation with wings attached to resilient latches of the jack housing, the camming members having camming surfaces whereby the wings overlap these surfaces such that during retraction of the plug from the jack, the wings engage the camming surfaces causing the latches to bias resiliently outward hence unlatching the jack from the plug body.

28. The connector of claim 6 characterized in that the plug housing has camming members for cooperation with wings attached to resilient latches of the jack housing, the camming members having camming surfaces whereby the wings overlap these surfaces such that during retraction of the plug from the jack, the wings engage the camming surfaces causing the latches to bias resiliently outward hence unlatching the jack from the plug body.

29. The connector of claim 26 characterized in that the plug has at least one pair of camming members, the camming members extending axially from the top or from the bottom of the plug housing and separated by a cavity that allows access for a jack housing latch projection to engage with a rib of the plug body for retention of the plug to the jack.

30. The connector of claim 27 characterized in that the plug has at least one pair of camming members, the camming members extending axially from the top or from the bottom of the plug housing and separated by a cavity that allows access for a jack housing latch projection to engage with a rib of the plug body for retention of the plug to the jack.

31. The connector of claim 28 characterized in that the plug has at least one pair of camming members, the camming members extending axially from the top or from the bottom of the plug housing and separated by a cavity that allows access for a jack housing latch projection to engage with a rib of the plug body for retention of the plug to the jack.

32. The connector of claim 26 characterized in that there is at least one pair of camming members on the top side and opposing bottom side of the plug housing.

33. The connector of claim 27 characterized in that there is at least one pair of camming members on the top side and opposing bottom side of the plug housing.

34. The connector of claim 28 characterized in that there is at least one pair of camming members on the top side and opposing bottom side of the plug housing.

15. A fibre optic connector assembly, comprising a jack, and a plug member which is receivable in said jack in optical engagement therewith, the plug including an inner plug insert which carries a fibre in spring loaded condition therein, and the insert being slidably receivable within an outer housing, the inner body being axially movable within said housing, between a forward position provided by first stop means and a rearward position provided by second stop means, the fibre plug connector being characterized in that said second stop means are releasable to allow said inner body to move axially within said outer housing, to a position beyond said rearward position, thereby allowing said outer housing to move further forward, without undue spring load on said assembly.

16. A fibre optic connector assembly according to claim 15, characterized in that said second stop means are provided by a rearwardly extending resilient latch arm which abuts a forwardly facing latch face, the resilient latch arm being deflectable to a position clear from said face, to allow said housing to move further forward relative to said inner body.

17. A fibre optic connector assembly according either of claims 15 or 16, characterized in that said latches are deflected by actuator members positioned adjacent to the front face of the jack member.

18. A fibre optic connector assembly according to claim 16 characterized in that the receptacle jack has locking latch arms extending outwardly towards the plug receiving opening, and in that the housing surrounding the insert body includes an opening providing access to the stop member on the insert body, whereby a latch projection on the latch arm can extend through the opening to lock behind the stop member on the insert body.

19. A fibre optic connector assembly according to claim 18, characterized in that when in the position where the latch projection is positioned behind the stop member, the front face of the insert body is spaced from an inner face of the receptacle jack.

20. A fibre optic connector assembly according to claim 19, characterized in that said receptacle jack includes actuator members positioned adjacent to a front face of said jack, whereby said outer housing and insert body can be pushed forwardly to a position where said latch projections and stop member are spaced apart, whereby continued insertion of said housing causes the actuator members to deflect the second stop members such that the inner plug body is resiliently biased rearwardly to a position where the plug body is held exclusively by said latch projection whereby said outer housing can be floatably movable relative to said inner insert body.

22. The assembly of claim 20, characterized in that when in the position where the latch projections are engaging said latching shoulder, a front face of said insert body is spaced from the inner surface of said receptacle jack, and in that resilient lances releasably latch said insert body within the housing, and in that the receptacle jack includes actuator members adjacent to a front face of the receptacle jack, whereby the housing and insert body are moved forward together retained by said lances to a position where said locking projections are spaced from said latching shoulder, the actuator members extending through the opening to deflect the resilient lances to release the insert body from the outer housing, and the insert body is spring loaded outwardly to the extent where the latching projection is again in engagement with said shoulder.

21. A fibre optic connector assembly comprising a receptacle jack having a fibre receiving bore, a plug receiving cavity and latch arms extending forwardly and flanking said plug receiving cavity, and a fibre plug member having an outer housing retaining therein, a fibre insert body, the insert body having a forwardly loaded fibre positioned therein, the outer housing having an opening adjacent to a front face thereof, thereby said latch projections are engageable with a latching shoulder on said plug body, the assembly being characterized in that the outer housing is releasable from said plug body and the insert body is held exclusively by said latch arms, such that the housing is movable further forwardly.

35. A hybrid connector for forming an electrical and optical interconnection between a base and a mating component where the base is fixed and the mating component is pluggable thereto, the base including a complementary connector including an optical receptacle jack including a housing, thrust disengagement means and latching means said jack being in communication with an optical transmission member, the hybrid connector mounted on the mating component and comprising an electrical connector portion wherein electrical contacts are disposed within a housing for engaging complementary contacts on the base and a fibre plug portion having an outer housing with a cavity therein where an insert having a plug body including an optical ferrule is disposed within the cavity in a slidable and spring biased manner for abutting the jack to establish optical coupling with the optical transmission member;

the insert further including thrust means to enable insertion of the insert into the jack and latching means that cooperate with the latching means of the receptacle jack for retention of the insert and jack in static relation during the optical connection, where the plug housing is axially moveable over a tolerance absorption distance relative the jack and where this ayial tolerance absorption displacement does not influence the forces generated by the spring biased abuttment.

36. The hybrid connector of claim 35 wherein the fibre plug portion includes a plurality of cavities each having an insert therein.

37. The hybrid connector of claim 35 or 36 wherein the hybrid connector includes a plurality of board mounts extending therefrom.