Light pipe for a modular jack

• US 6,368,159 B1
• Filed: 12/13/2000
• Issued: 04/09/2002
• Est. Priority Date: 12/13/2000
• Status: Expired due to Fees

• Current Assignee: Bel Fuse Limited (Bel Fuse)
• Original Assignee: Stewart Connector Systems, Inc. (Bel Connector Incorporated)
• Inventors: Hess, John Matthew, Imschweiler, Derek
• Primary Examiner(s): Paumen, Gary
• Assistant Examiner(s): NGUYEN, PHUONGCHI T
• Application Number:
  US09/735,680
• Time in Patent Office: 482 Days
• Field of Search: 439/676, 439/490, 439/910, 439/488, 385/139, 385/149, 385/88, 385/89, 385/92, 385/14, 385/901, 385/147, 385/36
• US Class Current: 439/676
• CPC Class Codes: H01R 13/6641 with diode with LED H01R13/7175
• CPC Class Codes: H01R 13/7172 Conduits for light transmission
• CPC Class Codes: H01R 24/64 for high frequency, e.g. RJ 45
• CPC Class Codes: Y10S 385/901 Illuminating or display apparatus

Abstract

The new modular jack is mounted to a PC board to overlie an LED on this board. The jack includes a light pipe having a light-entry zone in its bottom surface, a first light reflection zone in its rear surface, a light indicator zone in its front surface and a longitudinal axis in the rear-to-front direction. The light pipe further includes in its top surface a second light reflection zone situated forward of the first light reflection zone, the first and second light reflection zones positioned to receive light from the LED and to reflect same forward to the light indicator zone which is visible at the front of the jack.

Claims

1. A modular jack and PC board assembly comprising a PC board having a first surface with a surface mounted LED mounted thereon and a modular jack mounted to said first surface and overlying said LED, said LED having rear and forward light-emitting portions which emit rear and forward light ray bundles respectively, said jack comprising a housing having front, rear, top and opposite side walls and a bottom, said housing defining in said front wall a recess for receiving a plug with at least one electrical contact in said housing for electrical engagement with said plug when it is inserted into said recess and a window adjacent said recess, said jack further comprising a light pipe having a top, bottom, front, rear and side surfaces and having a light-entry zone in said bottom surface, a first light reflection zone in said rear surface, and light indicator zone in said front surface, and defining a longitudinal axis in the rear-to-front direction, said light pipe further comprising in its top surface a second light reflection zone situated forward of said first light reflection zone, said first and second light reflection zones positioned to receive said rear and forward light bundles respectively from said LED and to reflect said light bundles forward to said light indicator zone which is visible through said window.

2. An assembly according to claim 1 wherein said first light reflection zone defines a plane that is inclined forwardly and forms an acute angle with respect to said longitudinal axis.

3. An assembly according to claim 1 wherein said light indicator zone has height and said LED has in the axial direction of said light emitting portions total length that is greater than said height of said light indicator zone, and said light pipe is configured to receive and reflect light from substantially said total length to substantially fill said height of said light indicator zone.

4. An assembly according to claim 1 wherein said rear and forward reflection zones each define an angle of about 40-55 degrees with respect to said longitudinal axis and wherein said LED has a top planar surface, and said longitudinal axis of said light pipe is inclined with respect to said LED'"'"'s top planar surface so that light entering said light entry surface is refracted to strike said first and second reflection zones and then be reflected in the direction of said longitudinal axis.

5. An assembly according to claim 1 for receiving and reflecting said forward and rearward light bundles from said LED to said light indicator zone, where the height between said LED'"'"'s light entry surface and said top surface of said light pipe is less than the axial length of the light-emitting portions of said LED.

6. An assembly according to claim 1 wherein portions of said top and bottom surfaces of said light pipe are engaged and constrained by said housing.

7. An assembly according to claim 1 wherein said rear and forward light bundles comprise separate light emitting chips of separate colors, and said first and second reflection zones reflect said rear and forward light bundles to produce different colors of illumination in said light indicator zone.

8. An assembly according to claim 1 wherein said housing comprises a plurality of said modular jacks aligned side-by-side.

9. An assembly according to claim 1 wherein said second light reflection zone is generally parallel to said first light reflection zone.

10. An assembly according to claim 2 wherein said second light reflection zone is generally parallel to said first light reflection zone.

11. An assembly according to claim 1 wherein said light pipe'"'"'s top surface defines therein a channel including axially spaced front and rear walls extending transversely between its opposite side surfaces and extending downward from said top surface toward said bottom surface, said front wall of said channel including thereon said second light reflection zone.

12. An assembly according to claim 11 wherein said first channel is situated in said light pipe such that some light emitted from said LED and received by said first reflection zone is reflected to said rear wall of said first channel where it is refracted and then exits said front wall of said first channel where it is again refracted and then travels to and is reflected off said bottom wall of said light pipe to said window.

13. An assembly according to claim 11 wherein said channel'"'"'s rear wall is axially spaced from its front wall and defines a plane that is inclined rearwardly forming an acute angle with respect to said longitudinal axis.

14. An assembly according to claim 13 wherein said light pipe further defines a first separation plane intermediate said top and bottom surfaces, and wherein said second reflection zone extends down to said first separation plane and said first reflection zone extends up to said first separation plane.

15. An assembly according to claim 14 wherein said LED emits between said rear and front light emitting portions a third light ray bundle, and where said light pipe'"'"'s bottom surface defines therein a second channel having rear and front walls extending transversely between its opposite side surfaces and extending upward from said bottom surface, and wherein said rear wall of said second channel includes thereon a secondary light reflection zone and said front wall thereof comprises a light refraction surface, whereby said third light ray bundle is received and reflected by said secondary light reflection zone and refracted by said refraction surface and directed to said window.

16. An assembly according to claim 15 wherein said second channel is situated axially intermediate said first and second light reflection zones and axially intermediate said rear and front light bundles.

17. An assembly according to claim 15 wherein said light pipe further defines a second separation plane intermediate said first separation plane and said bottom surface of said light pipe, and said second channel'"'"'s reflection surface extends upward to said second separation plane, and said first reflection zone extends downward to said second separation plane.

18. A modular jack mountable on a PC board to overlie a surface mounted LED mounted on said PC board, said LED having rear and forward light-emitting portions which emit rear and forward light ray bundles respectively, said jack comprising a housing having front, rear, top and opposite side walls and a bottom, and defining in said front wall a recess for receiving a plug with at least one electrical contact in said housing for electrical engagement with said plug when it is inserted into said recess and a window adjacent said recess, said jack further comprising a light pipe having a top, bottom, front, rear and side surfaces and having a light-entry zone in said bottom surface, a first light reflection zone in said rear surface, and light indicator zone in said front surface, and defining a longitudinal axis in the rear-to-front direction, said light pipe further comprising in its top surface a second light reflection zone situated forward of said first light reflection zone, said first and second light reflection zones positioned to receive said rear and forward light bundles respectively from said LED, and to reflect said light bundles forward to said light indicator zone which is visible through said window.

19. A modular jack according to claim 18 wherein said second light reflection zone is generally parallel to said first light reflection zone.

20. A modular jack according to claim 18 wherein said first light reflection zone defines a plane that is inclined forwardly and forms an acute angle with respect to said longitudinal axis.

21. A modular jack according to claim 18 wherein said light pipe'"'"'s top surface defines therein a channel including axially spaced front and rear walls extending transversely between its opposite side surfaces and extending downward from said top surface toward said bottom surface, said front wall of said channel including therein said second light reflection zone.

22. A modular jack according to claim 21 wherein said second light reflection zone is generally parallel to said first light reflection zone.

23. A modular jack according to claim 19 wherein said channel'"'"'s rear wall is axially spaced from its front wall and defines a plane that is inclined rearwardly forming an acute angle with respect to said longitudinal axis.

24. A modular jack according to claim 23 wherein said light pipe further defines a first separation plane intermediate said top and bottom surfaces, and wherein said second reflection zone extends down to said first separation plane and said first reflection zone extends up to said first separation plane.

25. A light pipe operable with an LED having rear and forward light-emitting portions which emit rear and forward light ray bundles respectively, said light pipe having a top, bottom, front, rear and side surfaces and having a light-entry zone in said bottom surface, a first light reflection zone in said rear surface, and light indicator zone in said front surface, and defining a longitudinal axis in the rear-to-front direction, said light pipe further comprising in its top surface a second light reflection zone situated forward of said first light reflection zone, and said first and second light reflection zones positioned to receive said rear and forward light bundles respectively and to reflect light bundles forward to said light indicator zone.

26. A light pipe according to claim 25 wherein said channel'"'"'s rear wall is axially spaced from its front wall and defines a plane that is inclined rearwardly forming an acute angle with respect to said longitudinal axis.