Shielded fiber optic connector assembly

• US 4,840,451 A
• Filed: 12/08/1987
• Issued: 06/20/1989
• Est. Priority Date: 12/08/1987
• Status: Expired due to Fees

• Current Assignee: Molex Incorporated
• Original Assignee: Molex Incorporated
• Inventors: Brunker, David L., Dambach, Philip J., Sampson, Stephen A.
• Primary Examiner(s): Scott, Jr., Leon
• Application Number:
  US07/130,145
• Time in Patent Office: 560 Days
• Field of Search: 350/96.20, 350/96.21, 350/96.22, 339/19
• US Class Current: 385/89
• CPC Class Codes: G02B 6/4277 Protection against electromagnetic interference [EMI], e.g. shielding means shielding of electric apparatus H05K9/00, of instruments G12B17/00
• CPC Class Codes: G02B 6/4292 the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements

Abstract

An improved fiber optic connector assembly for connecting the ends of optical fibers to OED lenses is provided by a plug connector including a front mating end and a corresponding number of fiber receiving channels. Each channel includes an enlarged generally cylindrical portion adjacent the front end wherein the optical fiber end is coaxially positioned. The plug connector is mateable with a receptacle connector including a housing having a plug receiving socket with a front opening and a rear wall. The rear wall includes a corresponding number of spaced interface apertures aligned with each OED lens. A plurality of tubular projections coaxially aligned with and surrounding each aperture extend forwardly into the plug-receiving socket. As the plug connector is inserted into the socket, the tubular projections are received within the enlarged portions of the fiber receiving channels surrounding the fiber ends and the ends of the optical fibers are guided by the tubular projections into abutting coaxial alignment with the apertures and lenses, respectively. In a preferred embodiment, the receptacle connector housing is formed of die cast zinc to provide a shielded fiber optic link connector assembly for connecting a CPU to peripheral equipment which is characterized by reduced or eliminated EMI emissions. In an especially preferred embodiment, a shielded connector assembly including an integral switch feature is provided.

Claims

1. A fiber optic receptacle connector for connecting at least one optical-electronic device of the type including a body with a major face and having a lens projecting from said face to at least one end of an optical fiber secured in a plug connector, said receptacle connector comprising;

a plug-receiving socket with a front opening and a rear wall, said rear wall including a corresponding number of spaced interface apertures, each interface aperture being aligned with and dimensioned to closely coaxially receive the projecting lens of one said optical-electronic device, said rear wall further including a corresponding number of tubular projections coaxially aligned with and surrounding each aperture extending forwardly into the plug-receiving socket,

whereby, as a plug connector is inserted into the socket, each said optical fiber end is received and guided by a said tubular projection into abutting coaxial alignment with the aperture and lens, respectively.

2. A receptacle connector as in claim 1, wherein the housing is an integral unitary member.

3. A receptacle connector as in claim 1, wherein the housing is an integral, unitary electrically conductive member.

4. A receptacle connector as in claim 3, wherein each interface aperture has a diameter and each tubular projection has a length which is at least about three times said interface aperture diameter.

5. A receptacle connector as in claim 1, wherein the housing is an integral, unitary die cast zinc member.

6. A receptacle connector as in claim 1, wherein each tubular projection has an internal diameter dimensioned to closely slideably receive an end of an optical fiber.

7. A receptacle connector as in claim 1, wherein said rear wall includes an outside surface opposite the socket having at least one recess for receiving and positioning a said optical-electronic device so that the projecting lens is coaxially aligned with and received in an interface aperture.

8. A receptacle connector as in claim 7, further comprising mounting means for retaining the optical-electronic device in a said recess on the outside surface.

9. A fiber optic connector assembly for connecting the ends of one or more optical fibers to a corresponding number of optical-electronic devices, each optical-electronic device including a body with a major face and a lens projecting from said major face, said connector assembly comprising:

a plug connector including an elongate housing having a front mating end with an opening, a rear end with an opening and a corresponding number of fiber-receiving channels extending between said openings, each channel including an enlarged, generally cylindrical portion adjacent the front end wherein the fiber end is coaxially positioned; and

a receptacle connector including a housing having a plug-receiving socket with a front opening and a rear wall, said rear wall including a corresponding number of spaced interface apertures, each interface aperture being aligned with and being dimensioned to closely coaxially receive the projecting lens of one said optical-electronic device, said rear wall further including a plurality of tubular projections coaxially aligned with and surrounding each aperture extending forwardly into the plug-receiving socket;

whereby, as the plug connector is inserted into the socket, the tubular projections are received within the enlarged portions of the fiber-receiving channels surrounding the fiber ends and the optical fiber ends are guided by the tubular projections into abutting coaxial alignment with the apertures and lenses, respectively.

10. A connector assembly in claim 9, wherein the receptacle housing is an integral unitary member.

11. A connector assembly as in claim 9, wherein the receptacle housing is an integral, unitary electrically conductive member.

12. A connector assembly as recited in claim 11, wherein each interface aperture has a diameter and each tubular projection has a length which is at about three times said interface aperture diameter.

13. A connector assembly as in claim 9, wherein the housing is an integral, unitary die cast zinc member.

14. A receptacle assembly as in claim 9, wherein each tubular projection has an internal diameter dimensioned to closely slideably receive an end of an optical fiber.

15. A receptacle assembly as in claim 9, wherein said rear wall includes an outside surface opposite the socket having at least one recess for receiving and positioning each said optical-electronic device so that the projecting lens is coaxially aligned with and received in an interface aperture.

16. A connector assembly as in claim 15, further comprising mounting means for retaining the optical-electronic devices in said recesses on said outside surface.

17. A connector assembly as recited in claim 16, wherein said mounting means comprises a plurality of staking tab projections rearwardly extending from said outside surface on opposed sides of each recess;

and an elongate generally rectangular dielectric retainer member having a plurality of mounting apertures therethrough and received on said staking tab projections, said tab projections being staked over to retain the retainer member on said outside surface with each optical-electronic device supported therebetween.

18. A connector assembly as recited in claim 12, further including an integral switch assembly, said switch assembly comprising:

a switch aperture extending through the rear wall of the receptacle housing;

an elongate electrically conductive switch arm cantilever mounted at one end to an outside surface of the rear wall opposite the socket having an opposed free end with a contact portion extending beyond the receptacle housing, said switch arm being biased against the outside surface and overlying the switch aperture; and

switch contact means rearwardly spaced from said switch arm and said outside surface and aligned with the contact portion on the free end of the switch arm;

said swtich arm being resiliently deflectable between a normally open position, wherein the switch arm is biased against the outside surface and the contact portion on the free end of the switch arm is spaced from said switch contact means, and a closed position, wherein the free end of the switch arm is rearwardly deflected away from the outside surface and the contact portion electrically engages the switch contact means.

19. A connector assembly as in claim 18, wherein said plug connector optionally further includes a forwardly projecting switch boss actuator extending from the front mating end which, upon mating of the plug connector with the receptacle connector, is received through said switch aperture into engagement with the switch arm to deflect the switch arm from said normally open position to said closed position.

20. A connector assembly as in claim 18, wherein said switch contact means comprises an elongate conductive switch pin mounted in said retainer member.

21. A connector assembly as in claim 9, further including an integral switch assembly, said switch assembly comprising:

a switch aperture extending through the rear wall of the receptacle housing;

an elongate electrically conductive switch arm cantilever mounted at one end to an outside surface of the rear wall opposite the socket having an opposed free end with a contact portion extending beyond the receptacle housing, said switch arm being biased against the outside surface and overlying the switch aperture; and

switch contact means rearwardly spaced from said switch arm and said outside surface and aligned with the contact portion on the free end of the switch arm;

said switch arm being resiliently deflectable between a normally open position, wherein the switch arm is biased against the outside surface and the contact portion on the free end of the switch arm is spaced from said switch contact means, and a closed position, wherein the free end of the switch arm is rearwardly deflected away from the outside surface and the contact portion electrically engages the switch contact means.

22. A connector assembly as in claim 21, wherein said plug connector optionally further includes a forwardly projecting switch boss actuator extending from the front mating end which, upon mating of the plug connector with the receptacle connector, is received through said switch aperture into engagement with the switch arm to low deflect the switch arm from said normally open position to said closed position.